CN216672852U - Safe power supply driving circuit capable of realizing online detection - Google Patents
Safe power supply driving circuit capable of realizing online detection Download PDFInfo
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- CN216672852U CN216672852U CN202122706366.9U CN202122706366U CN216672852U CN 216672852 U CN216672852 U CN 216672852U CN 202122706366 U CN202122706366 U CN 202122706366U CN 216672852 U CN216672852 U CN 216672852U
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Abstract
The utility model provides a safe power supply driving circuit capable of realizing online detection, which comprises a newly-added state switching module, a safe power supply output module, a Central Processing Unit (CPU) module and a state feedback acquisition module, wherein the newly-added state switching module receives control signals of a first CPU and a second CPU in the CPU module, converts an input power supply into a target power supply and outputs the target power supply to the safe power supply output module, and the target power supply is a power supply passing through a circuit with a switching state; the safety power supply output module receives pulse signals of the first CPU and the second CPU, converts an input target power supply into a safety power supply and outputs the safety power supply; the state feedback acquisition module acquires circuit states in the newly-added state switching module and the safety power supply output module and sends the circuit states to the CPU module so that the CPU module can check the circuit states. The circuit provided by the utility model realizes timely circuit fault detection by adding the newly added state switching module in the power supply driving circuit.
Description
Technical Field
The utility model relates to the technical field of power supply driving, in particular to a safe power supply driving circuit capable of realizing online detection.
Background
The safety power supply circuit is a critical part of the CBTC system. The ground platform system is used for managing trackside equipment such as turnouts, signal machines, track sections, shielded gates, emergency stop buttons and the like on a line through a safety output circuit consisting of a safety power supply circuit, and realizes the control of an access. The whole safety power supply circuit mainly comprises a dynamic direct current conversion circuit, a safety relay circuit, a mutually exclusive relay node state acquisition circuit, a processor and the like, the safety power supply circuit conforms to the regulations of related activities of the system safety life cycle in the EN50126 and EN50129 standards, and conforms to the railway signal failure-safety principle, the safety of each function or the failure of components in each function unit can be ensured, so that the system is not in a dangerous failure state, the safety work of the whole system is ensured, and meanwhile, the safety power supply can be applied to other safety modules in the system.
Previously, the following approaches were mainly taken for the driving of the safety power supply: the pulse square wave with fixed frequency is sent out through 2 processors, the safety relay is driven, the safety output of a safety power supply is realized, the mutual exclusion node state of the safety relay is collected, and 2 processors carry out 2-time voting on the state of the safety relay so as to determine the working state of the safety relay. However, this method has the following drawbacks: during normal operation of the safety power supply circuit, the circuit has no switching of other paths, so that the circuit state is not changed, and the circuit without state switching change cannot detect circuit faults through the relationship between the states.
Therefore, how to increase the state switching in the power driving circuit to check the circuit fault in time is still an urgent problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model provides a safe power supply driving circuit capable of being detected on line, which is used for solving the problem that the circuit fault cannot be detected in time because the existing safe power supply driving circuit does not have state switching.
The utility model provides a safe power supply driving circuit capable of on-line detection, which comprises a newly-added state switching module, a safe power supply output module, a Central Processing Unit (CPU) module and a state feedback acquisition module, wherein the CPU module, the newly-added state switching module and the safe power supply output module are sequentially connected, the state feedback acquisition module is respectively connected with the CPU module, the newly-added state switching module and the safe power supply output module, wherein,
the newly-added state switching module is used for receiving control signals of a first CPU and a second CPU in the CPU module, converting an input power supply into a target power supply and outputting the target power supply to the safety power supply output module, wherein the target power supply is a power supply passing through a circuit with a switching state;
the safe power supply output module is used for receiving pulse signals of the first CPU and the second CPU and converting the input target power supply into a safe power supply for output;
the state feedback acquisition module is used for acquiring circuit states in the newly-added state switching module and the safety power supply output module and sending the circuit states to the CPU module so that the CPU module can check the circuit states.
According to the on-line detectable safety power supply driving circuit provided by the utility model, the newly added state switching module comprises a first safety relay and a second safety relay, wherein,
the first safety relay, the second safety relay and the safety power supply output module are connected in sequence, a first normally open contact of the first safety relay is connected with a second normally closed contact of the second safety relay in series, and a first normally closed contact of the first safety relay is connected with a second normally open contact of the second safety relay in series.
According to the safe power supply driving circuit capable of realizing online detection, the first safety relay is connected with the first CPU and receives a first control signal sent by the first safety relay;
and the second safety relay is connected with the second CPU and receives a second control signal sent by the second safety relay.
According to the safe power driving circuit capable of on-line detection provided by the utility model, the state feedback acquisition module comprises a first state acquisition feedback unit, a second state acquisition feedback unit, a third state acquisition feedback unit and a fourth state acquisition feedback unit, wherein,
the first state acquisition feedback unit is used for acquiring the opening and closing states of the first normally open contact, the second normally open contact, the first normally closed contact and the second normally closed contact and sending the opening and closing states to the first CPU;
the second state acquisition feedback unit is used for acquiring the opening and closing states of the first normally open contact, the second normally open contact, the first normally closed contact and the second normally closed contact and sending the opening and closing states to the second CPU;
the third state acquisition feedback unit is used for acquiring first target states of all contacts of a first relay and a second relay in the safety power supply output module and sending the first target states to the first CPU;
and the fourth state acquisition feedback unit is used for acquiring second target states of all contacts in the safety power supply output module and sending the second target states to the second CPU.
According to the safe power driving circuit capable of online detection provided by the utility model, the CPU module is used for:
and performing state data interaction according to the first CPU and the second CPU, and acquiring the circuit state based on a 2-out-of-2 voting mode.
The safe power supply driving circuit capable of online detection further comprises an electromagnetic compatibility (EMC) protection module and a power failure holding module, wherein,
the EMC protection module, the power-down maintaining module and the newly-added state switching module are connected in sequence.
The safe power supply driving circuit capable of on-line detection provided by the utility model also comprises an output protection module, wherein,
and the safety power output by the safety power output module is processed by the output protection module to obtain a reliable safety power and then output.
The safe power supply driving circuit capable of on-line detection further comprises an isolation module and a dynamic control module, wherein,
the CPU module, the isolation module, the dynamic control module and the safe power supply output module are connected in sequence.
According to the safe power supply driving circuit capable of realizing online detection, the isolation module comprises a first isolation module and a second isolation module, and the dynamic control module comprises a first dynamic control module and a second dynamic control module.
According to the safe power supply driving circuit capable of online detection provided by the utility model, the CPU module, the isolation module, the dynamic control module and the safe power supply output module are sequentially connected, and specifically include:
the first CPU, the first isolation module, the first dynamic control module and a first safety relay in the safety power output module are sequentially connected, and the second CPU, the second isolation module, the second dynamic control module and a second safety relay in the safety power output module are sequentially connected.
The utility model provides an online detection safety power supply driving circuit, which comprises a newly-added state switching module, a safety power supply output module, a Central Processing Unit (CPU) module and a state feedback acquisition module, wherein the newly-added state switching module receives control signals of a first CPU and a second CPU in the CPU module, converts an input power supply into a target power supply and outputs the target power supply to the safety power supply output module, and the target power supply is a power supply passing through a circuit with a switching state; the safe power supply output module receives pulse signals of the first CPU and the second CPU, converts the input target power supply into a safe power supply and outputs the safe power supply; the state feedback acquisition module acquires circuit states in the newly-added state switching module and the safety power supply output module and sends the circuit states to the CPU module so that the CPU module can check the circuit states. Because the newly added state switching module is added in the traditional safety power supply driving circuit, the newly added state switching module converts an input power supply into a target power supply and outputs the target power supply to the safety power supply output module, and the CPU module detects the circuit state in the newly added state switching module besides the safety power supply output module, thereby increasing the reliability of circuit fault detection. Therefore, the circuit provided by the embodiment of the utility model realizes timely circuit fault detection by adding the newly added state switching module in the power supply driving circuit.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is one of the schematic structural diagrams of the on-line detectable safety power driving circuit provided in the present invention;
FIG. 2 is a second schematic diagram of the structure of the on-line detectable safety power driving circuit according to the present invention;
fig. 3 is a third schematic structural diagram of the on-line detectable safety power driving circuit provided in the present invention.
Reference numerals:
101: a newly added state switching module; 102: a safety power supply output module; 103: a CPU module;
104: a state feedback acquisition module; 105: a first CPU; 106: a second CPU;
107: a first safety relay; 108: a second safety relay; 109: an EMC protection module;
110: a power down hold module; 111: an output protection module; 112: an isolation module;
113: a dynamic control module; 114: a first state acquisition feedback unit; 115: a second state acquisition feedback unit;
116: a third state acquisition feedback unit; 117: a fourth state acquisition feedback unit; 118: a first isolation module;
119: a second isolation module; 120: a first dynamic control module; 121: a second dynamic control module;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The problem that circuit faults cannot be detected in time due to the fact that state switching does not exist in the power supply driving circuit generally exists in the existing safe power supply driving circuit. The following describes a safe power driving circuit capable of online detection provided by the present invention with reference to fig. 1 to 3. Fig. 1 is a schematic structural diagram of a safe power driving circuit capable of online detection according to the present invention, as shown in fig. 1, the circuit includes a newly added state switching module 101, a safe power output module 102, a central processing unit CPU module 103, and a state feedback acquisition module 104, wherein,
the newly added state switching module 101 receives control signals of a first CPU105 and a second CPU106 in the CPU module, converts an input power into a target power, and outputs the target power to the safety power output module 102, where the target power is a power passing through a circuit in a switching state;
the safe power output module 102 receives pulse signals of the first CPU105 and the second CPU106, converts the input target power into a safe power, and outputs the safe power;
the state feedback acquisition module 104 acquires the circuit states in the newly added state switching module 101 and the safety power output module 102 and sends the circuit states to the CPU module 103, so that the CPU module 103 checks the circuit states.
Optionally, compared to the conventional safety power driving circuit, the new state switching module 101 is added to the safety power driving circuit provided in fig. 1, and accordingly, the first CPU105 and the second CPU106 in the CPU module 103 in the circuit also need to send a control signal to the new state switching module 101 to control the circuit state switching therein, and meanwhile, the state feedback acquisition module 104 also needs to acquire the circuit state in the new state switching module 101 and output the circuit state to the first CPU105 and the second CPU106 for performing state data interaction between the first CPU105 and the second CPU106 to check the state data, so as to perform preliminary circuit fault checking.
Compared with the traditional safety power supply driving circuit, the circuit provided by the utility model is additionally provided with the state switching module, the CPU module 103 is correspondingly used for sending a control signal to control the circuit to be switched, and the state feedback acquisition module is used for acquiring the circuit state in the state switching module so that the CPU module 103 can analyze whether the circuit state is normal or not to obtain a preliminary inspection conclusion whether the circuit has a fault or not. The newly added state switching module 101 may be two branches including switches, two control signals sent by the CPU module 103 control the conduction of each branch, when one branch switch is powered on, the switch of the other branch is powered off, the newly added state switching module 101 may also be two safety relays connected in series, that is, an input power source passes through the first safety relay and then reaches the safety power source output module 102 through the other safety relay, and contacts in the two safety relays control the power-on and power-off of the contacts through the control signals sent by the CPU module, so that one of the two branches formed by the two safety relays connected in series is conducted, and the other branch is disconnected.
The utility model provides a safe power supply driving circuit capable of realizing online detection, which comprises a newly increased state switching module, a safe power supply output module, a Central Processing Unit (CPU) module and a state feedback acquisition module, wherein the newly increased state switching module receives control signals of a first CPU and a second CPU in the CPU module, converts an input power supply into a target power supply and outputs the target power supply to the safe power supply output module, and the target power supply is a power supply passing through a circuit with a switching state; the safe power supply output module receives pulse signals of the first CPU and the second CPU, converts the input target power supply into a safe power supply and outputs the safe power supply; the state feedback acquisition module acquires circuit states in the newly-added state switching module and the safety power supply output module and sends the circuit states to the CPU module so that the CPU module can check the circuit states. Because the newly added state switching module is added in the traditional safety power supply driving circuit, the newly added state switching module converts an input power supply into a target power supply and outputs the target power supply to the safety power supply output module, and the CPU module detects the circuit state in the newly added state switching module besides the safety power supply output module, thereby increasing the reliability of circuit fault detection. Therefore, the circuit provided by the embodiment of the utility model realizes timely circuit fault detection by adding the newly added state switching module in the power supply driving circuit.
Based on the above embodiment, fig. 2 is a second schematic structural diagram of the on-line detectable safety power driving circuit provided by the present invention, as shown in fig. 2, in the circuit, the newly added state switching module 101 includes a first safety relay 107 and a second safety relay 108, wherein,
the first safety relay 107, the second safety relay 108 and the safety power output module 102 are connected in sequence, a first normally open contact a of the first safety relay 107 is connected in series with a second normally closed contact c of the second safety relay 108, and a first normally closed contact b of the first safety relay 107 is connected in series with a second normally open contact d of the second safety relay 108;
the first safety relay 107 is connected with the first CPU and receives a first control signal sent by the first safety relay;
the second safety relay 108 is connected to the second CPU, and receives a second control signal sent by the second CPU.
Optionally, the utility model further limits the specific structure of the newly added state switching module 101, and simultaneously sets the positive and negative relationship of the control signal to ensure that two branches in the newly added state switching module 101 are in a switching relationship, and the safety relay is connected in series to prevent the fault of a single relay from causing the error output of the safety power supply, and meanwhile, the reliability of the safety power supply circuit is improved by the way of parallel redundancy of the relay nodes; namely, the newly added state switching module 101 includes two safety relays, a first safety relay 107 and a second safety relay 108. When the first control signal and the second control signal are mutually opposite signals, one of two branches obtained by connecting two safety relays in series is conducted, namely the first control signal and the second control signal need to be switched simultaneously, and each switching is ensured to be mutually opposite, namely when the first control signal is electrified, the second control signal is null, when the first control signal is switched from the electrification to the vacancy, the second control signal is also switched from the vacancy to the electrification, for example, when the first control signal is electrified and the second control signal is vacant, the first safety relay normally works, a normally open contact a is opened, a normally closed contact b is closed, the second safety relay is in power-off suspension, a normally closed contact c is opened, a normally open contact d is closed, because the contacts a and c are opened simultaneously and the contacts b and d are closed simultaneously, the branch where the contacts a and c are located is disconnected, the branch where the contacts b and d are positioned is conducted; when the first control signal is changed from live to empty and the second control signal is also changed from idle to live, the first safety relay stops working, the normally open contact a is closed, the normally closed contact b is opened, the second safety relay normally works, the normally closed contact c is closed, and the normally open contact d is opened, so that the contact a and the contact c are closed and the contact b and the contact d are opened simultaneously, the branch where the contacts a and c are located is conducted, the branch where the contacts b and d are located is disconnected, and the reverse direction from the last control signal to the current control signal is obtained, and the conduction branch of the circuit is switched from the branch where the contacts b and d are located to the branch where the contacts a and c are located to be conducted. It should be noted here that the connection relationship between the contacts in the first safety relay 107 and the second safety relay 108 may also realize the switching of the circuit branch state required by the present invention, for example, a first normally open contact a in the first safety relay 107 and a second normally open contact d in the second safety relay 108 are connected in series, a first normally closed contact b in the first safety relay 107 and a second normally closed contact c in the second safety relay 108 are connected in series, then the first control signal and the second control signal are the same signal and the switching timing is kept the same, that is, if the first control signal is charged, the second control signal is also charged, if the first control signal is changed from charged to empty, the second control signal is also changed from charged to empty, therefore, the first normally open contact a and the second normally open contact can be ensured to be simultaneously conducted, and the first normally closed contact b and the second normally closed contact c are simultaneously disconnected.
Based on the above embodiment, in the circuit, the state feedback acquisition module includes a first state acquisition feedback unit, a second state acquisition feedback unit, a third state acquisition feedback unit, and a fourth state acquisition feedback unit, wherein,
the first state acquisition feedback unit acquires the opening and closing states of the first normally open contact, the second normally open contact, the first normally closed contact and the second normally closed contact and sends the opening and closing states to the first CPU;
the second state acquisition feedback unit acquires the opening and closing states of the first normally open contact, the second normally open contact, the first normally closed contact and the second normally closed contact and sends the opening and closing states to the second CPU;
the third state acquisition feedback unit acquires first target states of all contacts of a first relay and a second relay in the safety power supply output module and sends the first target states to the first CPU;
and the fourth state acquisition feedback unit acquires second target states of all contacts in the safety power supply output module and sends the second target states to the second CPU.
Optionally, a specific structure of the state feedback acquisition module is further defined, and the state feedback acquisition module includes four state feedback acquisition units, where the first state feedback acquisition unit and the second state feedback acquisition unit are used to perform redundant acquisition on the contact states of each relay in the newly added state switching module, so that when the CPU module performs 2-out-of-2 voting verification, validity of acquired state data is verified by comparing whether state results of the same contact acquired by different acquisition units are the same or not. Similarly, the third state feedback acquisition unit and the fourth state feedback acquisition unit are used for performing redundant acquisition on the states of all contacts in the safety power output module, so that when the CPU module performs 2-out-of-2 voting verification, the effectiveness of the acquired state data is verified by comparing whether the state results of the same contact acquired by different acquisition units are the same or not. The circuit structure can ensure that the failure of a single node can not cause the loss of the function of the safety power supply, and the safety stability of the system is improved.
Based on the above embodiment, in the circuit, the checking, by the CPU module, a circuit state specifically includes:
and the first CPU and the second CPU carry out state data interaction and check the circuit state in a 2-out-of-2 voting mode.
Optionally, fig. 3 is a third schematic structural diagram of the on-line detectable safety power supply driving circuit provided in the present invention, as shown in fig. 3, in the circuit, the first CPU and the second CPU receive the statuses sent by the first status feedback acquisition unit 114, the second status feedback acquisition unit 115, the third status feedback acquisition unit 116, and the fourth status feedback acquisition unit 117, because the first status feedback acquisition unit 114 acquires the statuses of all contacts in the status feedback acquisition module, and the second status feedback acquisition unit 115 also acquires the statuses of all contacts in the status feedback acquisition module, the first CPU105 receiving the status data sent by the first status feedback acquisition unit 114 and the second CPU106 receiving the status data sent by the second status feedback acquisition unit 115 perform data interaction, and then determine whether the status data collected from the newly added status switching module is valid by 2-out-of-2 voting, similarly, after data interaction is performed between the first CPU105 receiving the state data sent by the third state feedback acquisition unit 116 and the second CPU106 receiving the state data sent by the fourth state feedback acquisition unit 117, whether the state data collected from the safety power output module is valid is determined by 2-out-of-2 voting. The reliability of the circuit is ensured by the construction of the redundant circuit as above.
Based on the above embodiment, in the circuit, the checking the circuit state in the 2-out-of-2 voting manner specifically includes:
if all the state data obtained after the interaction is judged to meet the preset condition, the result of checking the circuit state is normal;
the preset conditions are that the states of the same contact collected at the first CPU and the second CPU are consistent and the states of the two contacts belonging to the same safety relay are opposite.
Alternatively, in the checking whether the circuit state is normally operated, in addition to verifying that the states of any same contact in all the contacts must be identical collected in different state feedback collecting units, it is necessary to verify that the states of two contacts in any same relay in all the relays must be opposite, when the safety relay works normally, if the safety relay works on electricity, the normally open contact is open, the normally closed contact is closed, the states of the two contacts are opposite, if the safety relay stops working when power is off, the normally open contact is closed and the normally closed contact is open, the two contact states are still opposite, and therefore, when the circuit is verified to normally operate, the state data required to be collected simultaneously meets two conditions, that is, the states of all the same contacts collected at the first CPU105 and the second CPU106 are identical and the states of all the two contacts belonging to the same safety relay are opposite. The present embodiment provides a utility model in which the specific determination condition in the vote of 2 out of 2 is strictly and definitely defined.
Based on the above embodiment, in the circuit, if it is determined that all the state data obtained after the interaction satisfies the preset condition, the checking that the result of the circuit state is normal specifically includes:
if any contact point with inconsistent state collected at the first CPU and the second CPU is judged to exist, the result of checking the circuit state is abnormal;
otherwise, if the states of the two contacts belonging to the same safety relay are determined to be not opposite, the result of checking the circuit state is abnormal, and if the states of the two contacts belonging to the same safety relay are determined to be opposite, the result of checking the circuit state is normal.
Optionally, the preset condition is that it needs to be determined whether all the contacts simultaneously satisfy two conditions that the states of all the same contacts collected at the first CPU105 and the second CPU106 are consistent and the states of all the two contacts belonging to the same safety relay are opposite, in order to improve the determination efficiency, a determination priority is set between the two conditions, that is, it is determined whether the states of all the same contacts collected at the first CPU105 and the second CPU106 are consistent first, if this condition is satisfied, when it is determined that the states of the two contacts belonging to the same safety relay are opposite subsequently, the determination can be completed by using the first target state data collected by any one state feedback collection unit, because the second target state data collected by the other state feedback collection unit is already determined to be consistent with the first target state data, and it is not necessary to perform verification again.
Based on the above-mentioned embodiment, the circuit further includes an electromagnetic compatibility EMC protection module 109 and a power down holding module 110, wherein,
the EMC protection module 109, the power down maintaining module 110 and the newly added state switching module 101 are connected in sequence.
Optionally, an EMC protection module 109 and a power down maintaining module 110 are added at the input power source, where the EMC protection module 109 can correct the surge and static abnormal condition, and the power down maintaining module 110 can maintain a certain time to output power to the newly added state switching module in case of short-time power down of the input power source.
Based on the above embodiment, the circuit further includes an output protection module 111, wherein,
the safety power output by the safety power output module 102 is processed by the output protection module 111 to obtain a reliable safety power and then output.
Optionally, an output protection module 111 for post-processing is added before the output of the safety power supply, so that the safety and reliability of the output power supply can be ensured, and the output power supply is not influenced by electromagnetism of other currents in the circuit.
Based on the above-mentioned embodiment, the circuit further includes an isolation module 112 and a dynamic control module 113, wherein,
the CPU module 103, the isolation module 112, the dynamic control module 113, and the safety power output module 102 are connected in sequence.
Optionally, the pulse signal sent by the CPU module 103 needs to be processed by an isolation module 112 and a dynamic control module 113, which play a role of preprocessing, and then controls circuit switching in the safety power output module. The isolation module 112 is configured to isolate electromagnetic interference of other currents in the circuit, and the dynamic control module 113 is configured to convert the pulse signal into a signal more suitable for controlling a relay in the safety power output module.
Based on the above embodiment, in the circuit, the isolation module includes the first isolation module 118 and the second isolation module 119, and the dynamic control module 113 includes the first dynamic control module 120 and the second dynamic control module 121;
correspondingly, the CPU module 103, the isolation module 112, the dynamic control module, and the safety power output module are connected in sequence, specifically including:
the first CPU105, the first isolation module 118, the first dynamic control module 120 and the first safety relay 107 in the safety power output module 102 are connected in sequence, and the second CPU106, the second isolation module 119, the second dynamic control module 121 and the second safety relay 108 in the safety power output module 102 are connected in sequence.
Optionally, under the condition that the devices in the safety power output module are limited to be two relays, specific structures of the isolation module and the dynamic control module which perform a preprocessing function on the pulse signal are further limited, and the devices in the safety power output module are conveniently controlled to be the two relays respectively to realize state switching of the two relays.
The safe power supply driving circuit capable of being detected on line provided by the embodiment realizes the safe power supply driving circuit scheme capable of being detected on line, and accords with the safe design scheme of a rail transit signal system; the safety and reliability of the system are improved; the whole circuit is formed by basic electronic devices, the failure mode of the whole circuit is clear, a complex integrated circuit is not introduced, and the circuit has strong feasibility and is convenient for safety analysis.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A safe power supply driving circuit capable of on-line detection is characterized by comprising a newly-added state switching module, a safe power supply output module, a Central Processing Unit (CPU) module and a state feedback acquisition module, wherein the CPU module, the newly-added state switching module and the safe power supply output module are sequentially connected, the state feedback acquisition module is respectively connected with the CPU module, the newly-added state switching module and the safe power supply output module, wherein,
the newly-added state switching module is used for receiving control signals of a first CPU and a second CPU in the CPU module, converting an input power supply into a target power supply and outputting the target power supply to the safety power supply output module, wherein the target power supply is a power supply passing through a circuit with a switching state;
the safe power supply output module is used for receiving pulse signals of the first CPU and the second CPU and converting the input target power supply into a safe power supply for output;
the state feedback acquisition module is used for acquiring circuit states in the newly-added state switching module and the safety power supply output module and sending the circuit states to the CPU module so that the CPU module can check the circuit states.
2. The on-line detectable safety power driving circuit according to claim 1, wherein the newly added state switching module comprises a first safety relay and a second safety relay, wherein,
the first safety relay, the second safety relay and the safety power supply output module are connected in sequence, a first normally open contact of the first safety relay is connected with a second normally closed contact of the second safety relay in series, and a first normally closed contact of the first safety relay is connected with a second normally open contact of the second safety relay in series.
3. The on-line detectable safe power supply driving circuit as claimed in claim 2, wherein the first safe relay is connected with the first CPU and receives the first control signal sent by the first CPU;
and the second safety relay is connected with the second CPU and receives a second control signal sent by the second safety relay.
4. The on-line detectable safety power driving circuit according to claim 2, wherein the state feedback acquisition module comprises a first state acquisition feedback unit, a second state acquisition feedback unit, a third state acquisition feedback unit and a fourth state acquisition feedback unit, wherein,
the first state acquisition feedback unit is used for acquiring the opening and closing states of the first normally open contact, the second normally open contact, the first normally closed contact and the second normally closed contact and sending the opening and closing states to the first CPU;
the second state acquisition feedback unit is used for acquiring the opening and closing states of the first normally open contact, the second normally open contact, the first normally closed contact and the second normally closed contact and sending the opening and closing states to the second CPU;
the third state acquisition feedback unit is used for acquiring first target states of all contacts of a first relay and a second relay in the safety power supply output module and sending the first target states to the first CPU;
and the fourth state acquisition feedback unit is used for acquiring second target states of all contacts in the safety power supply output module and sending the second target states to the second CPU.
5. The on-line detectable safety power supply driving circuit as claimed in claim 3, wherein the CPU module is configured to:
and performing state data interaction according to the first CPU and the second CPU, and acquiring the circuit state based on a 2-out-of-2 voting mode.
6. An online-detectable safety power supply driving circuit according to any one of claims 1-5, characterized by further comprising an electromagnetic compatibility (EMC) protection module and a power-down holding module, wherein,
the EMC protection module, the power failure maintaining module and the newly added state switching module are connected in sequence.
7. The on-line detectable safety power supply driving circuit according to any one of claims 1 to 5, further comprising an output protection module, wherein,
and the safety power output by the safety power output module is processed by the output protection module to obtain a reliable safety power and then output.
8. The on-line testable safety power supply driving circuit according to one of claims 1 to 4, further comprising an isolation module and a dynamic control module, wherein,
the CPU module, the isolation module, the dynamic control module and the safety power supply output module are connected in sequence.
9. The on-line detectable safety power supply driving circuit according to claim 8, wherein the isolation module comprises a first isolation module and a second isolation module, and the dynamic control module comprises a first dynamic control module and a second dynamic control module.
10. The on-line detectable safety power supply driving circuit according to claim 9, wherein the CPU module, the isolation module, the dynamic control module and the safety power supply output module are connected in sequence, specifically comprising:
the first CPU, the first isolation module, the first dynamic control module and a first safety relay in the safety power output module are sequentially connected, and the second CPU, the second isolation module, the second dynamic control module and a second safety relay in the safety power output module are sequentially connected.
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