CN111864616B - Display device control circuit and five-prevention locking system - Google Patents
Display device control circuit and five-prevention locking system Download PDFInfo
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- CN111864616B CN111864616B CN202010574264.3A CN202010574264A CN111864616B CN 111864616 B CN111864616 B CN 111864616B CN 202010574264 A CN202010574264 A CN 202010574264A CN 111864616 B CN111864616 B CN 111864616B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B15/00—Supervisory desks or panels for centralised control or display
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
- H02H9/047—Free-wheeling circuits
Abstract
The application relates to a display device control circuit and a five-prevention locking system. Through parallelly connected with switch module and first capacitor assembly, when switch module disconnection, first capacitor assembly is in the high voltage state, can't start display device work through first transistor, second transistor and microprocessor. Meanwhile, the first end of the switch assembly is grounded, the first capacitor assembly discharges slowly at the moment that the switch assembly is closed, the first end of the switch assembly is grounded, and a generated instantaneous current lead is grounded, so that the working performance of the display device is prevented from being influenced by the generated instantaneous current and the like. The technical problem that the working performance of the existing display device is poor in the traditional technology is solved by providing the display device control circuit, and the technical effect of improving the working performance of the display device is achieved.
Description
Technical Field
The application relates to the technical field of electronic circuits, in particular to a display device control circuit and a five-prevention locking system.
Background
The five-prevention locking device is an electric power device with a five-prevention function, is mainly used for preventing electric misoperation, and plays an extremely important role in an electric power system. The five-prevention function specifically comprises the following five functions: the circuit breaker is prevented from being opened and closed by mistake; the isolating switch is prevented from being switched on and off under load; preventing the charged hanging (closing) of a grounding wire (a grounding switch); prevent the circuit breaker (isolating switch) from being closed with the grounding wire (grounding switch); prevent the wrong entering into the electrified interval.
Sometimes, in order to facilitate a worker to obtain the operation states of the five-prevention locking device and the primary device corresponding to the five-prevention locking device in real time, a display device is generally arranged on the surface of the five-prevention locking device, and some information is displayed in real time through the display device, so that the field worker can obtain the operation state information of the five-prevention locking device and the related devices thereof in real time. The current power supply modes of the display device include two types: the display equipment directly gets electricity from the power grid or is provided with a mobile power supply. However, no matter power is taken from a power grid or a mobile power supply is arranged, whether the display equipment works or not can be realized only by switching on and off the power supply at present, and very large instantaneous current can be generated at the moment of switching on and off of a switch, so that the working performance of the display equipment is easily influenced. Therefore, the current display device has poor working performance.
Disclosure of Invention
Therefore, it is necessary to provide a control circuit of a display device and a five-prevention locking system for solving the problem of poor working performance of the current display device.
A display device control circuit for controlling operation of a display device, the display device control circuit comprising:
the switch assembly comprises a first end and a second end, and the first end is grounded;
a first capacitive component connected in parallel with the switching component;
the grid electrode of the first transistor is electrically connected with the second end, the drain electrode of the first transistor is used for being connected with an external power supply, and the first transistor is a P-type transistor;
a gate of the second transistor is electrically connected with a source of the first transistor, a source of the second transistor is grounded, and the second transistor is an N-type transistor;
the input end of the microprocessor is electrically connected with the drain electrode of the second transistor, the output end of the microprocessor is in signal connection with the display equipment, and the microprocessor is used for controlling the display equipment to display information according to the drain electrode output signal of the second transistor.
In one embodiment, the switch assembly comprises a micro switch, a first end of the micro switch is grounded, and a second end of the micro switch is electrically connected with the grid electrode of the first transistor.
In one embodiment, the method further comprises the following steps:
and the anode of the first diode component is electrically connected with the second end, and the cathode of the first diode component is electrically connected with the grid electrode of the first transistor.
In one embodiment, the method further comprises the following steps:
and one end of the second capacitor component is electrically connected with the drain electrode of the first transistor, and the other end of the second capacitor component is electrically connected with the source electrode of the second transistor.
In one embodiment, the method further comprises the following steps:
and one end of the first resistor component is electrically connected with the grid electrode of the second transistor, and the other end of the first resistor component is electrically connected with the source electrode of the second transistor.
In one embodiment, the method further comprises the following steps:
and the input end of the booster circuit is used for being connected with the external power supply, and the output end of the booster circuit is electrically connected with the drain electrode of the first transistor.
In one embodiment, the boost circuit includes:
the inductance assembly is used for connecting the external power supply at one end;
and the third capacitor assembly is connected with the inductor assembly in parallel, and the common end of the inductor assembly and the third capacitor assembly is electrically connected with the drain electrode of the first transistor.
In one embodiment, the boost circuit further comprises:
and the grid electrode of the third transistor is electrically connected with one end of the third capacitor assembly far away from the inductor assembly, the drain electrode of the third transistor is electrically connected with the drain electrode of the inductor assembly and the drain electrode of the first transistor, the source electrode of the third transistor is grounded, and the third transistor is a P-type transistor.
In one embodiment, the boosting circuit further comprises:
and the anode of the second diode component is electrically connected with the common end of the inductance component and the third capacitance component, and the cathode of the diode component is electrically connected with the drain electrode of the first transistor.
A five-prevention lockout system comprising:
the five-prevention locking device is used for connecting primary equipment;
the display equipment is arranged on the five-prevention locking device;
according to the display device control circuit, the input end of the microprocessor is electrically connected with the drain electrode of the second transistor, the microprocessor is in signal connection with the display device, and the microprocessor is used for controlling the display device to display information according to the output signal of the drain electrode of the second transistor.
The display device control circuit provided by the embodiment of the application comprises a switch component, a first capacitor component, a first transistor, a second transistor and a microprocessor. By connecting the switch assembly and the first capacitor assembly in parallel, when the switch assembly is switched off, the first capacitor assembly is in a high-voltage state, and the display equipment cannot be started to work through the first transistor, the second transistor and the microprocessor. Meanwhile, the first end of the switch assembly is grounded, the first capacitor assembly discharges slowly at the moment when the switch assembly is closed, the first end of the switch assembly is grounded, and a generated instantaneous current lead is grounded, so that the working performance of the display device is prevented from being influenced by generated instantaneous current and the like. The technical problem that the working performance of the existing display equipment is poor in the traditional technology is solved by the display equipment control circuit, and the technical effect of improving the working performance of the display equipment is achieved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a control circuit of a display device according to an embodiment of the present disclosure;
fig. 2 is a schematic circuit diagram of a part of a control circuit of a display device according to an embodiment of the present application;
fig. 3 is a schematic circuit diagram of a portion of a control circuit of a display device according to an embodiment of the present disclosure;
fig. 4 is a schematic circuit diagram of a part of a control circuit of a display device according to an embodiment of the present application;
fig. 5 is a schematic diagram of a boost circuit of a control circuit of a display device according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of a five-prevention locking system according to an embodiment of the present application.
Description of reference numerals:
10. a display device control circuit; 100. a switch assembly; 200. a first capacitive component; 300. a first transistor; 400. a second transistor; 500. a display device; 600. a microprocessor; 710. a first diode component; 720. a second capacitive component; 730. a first resistive component; 800. a boost circuit; 810. an inductance component; 820. a third capacitive component; 830. a third transistor; 840. a second diode assembly; 20. a five-prevention lockout system; 21. five prevent blocking device.
Detailed Description
In order to make the purpose, technical solution and advantages of the present application more apparent, the display device control circuit and the five-prevention lockout system of the present application are further described in detail by the embodiments and with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be considered as limiting the present application.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
The display device control circuit 10 provided in the embodiment of the present application is configured to control a display device 500 to operate, where the display device may be any display device in a power distribution network, for example, the display device may be a display device of a five-prevention locking device 21, and the display device control circuit 10 is used to control the display device of the five-prevention locking device 21 in this embodiment as an example for explanation.
Referring to fig. 1 to 3 together, an embodiment of the present application provides a display device control circuit 10 including: a switch assembly 100, a first capacitor assembly 200, a first transistor 300, a second transistor 400, and a microprocessor 600.
The switch element 100 includes a first terminal and a second terminal, the second terminal is electrically connected to the gate of the first transistor 300, and the first terminal of the switch element 100 is grounded. When the switch assembly 100 is closed, the first terminal and the second terminal are connected, and the current on the switch assembly 100 flows to the ground through the second terminal, so that the two terminals of the switch assembly 100 are kept at a low level potential. The switching element 100 provides a control signal, i.e., a high level signal or a low level signal, to the first transistor 300 in the subsequent circuit by turning on and off, wherein the high level is a level signal with a voltage higher than 4.99V, and the low level is a level signal with a voltage less than 0.01V. The switch assembly 100 may include one or more switches, which may be micro switches, ship-type switches, toggle switches, push-button switches, membrane switches, intelligent fire switches, steel frame switches, etc., and this embodiment is not particularly limited and may be specifically selected according to actual conditions.
The first capacitor assembly 200 is connected in parallel with the switch assembly 100, and the first capacitor assembly 200 is used for storing charges and stabilizing voltage, so that a relatively high voltage is still provided across the switch assembly 100 when the switch assembly 100 is turned off, and the two terminals of the switch assembly 100 are at a high level potential. When the switch assembly 100 is closed, a current is generated in the switch assembly 100, and the generated current flows to the ground through the first end of the switch assembly 100, so that a level signal across the switch assembly 100 is pulled down. The first capacitance component 200 may include one capacitor or may include a plurality of capacitors. When the first capacitor assembly 200 includes a plurality of capacitors, the plurality of capacitors may be connected in parallel or in series, and this embodiment is not particularly limited. The capacitance value of the first capacitor assembly 200 may be specifically selected according to actual conditions, and this implementation is not particularly limited, and only needs to implement a function of providing a certain voltage to two ends of the switch assembly 100 when the switch assembly 100 is turned off.
The gate of the first transistor 300 is electrically connected to the second terminal, the drain of the first transistor 300 is electrically connected to an external power source, and the first transistor 300 is a P-type transistor. The first transistor 300 may be a Bipolar Junction Transistor (BJT) that provides a certain transconductance and output resistance, amplifies a signal, has a strong power control capability, and has high speed and endurance characteristics, such as a heterojunction bipolar transistor, a darlington transistor, a power diode, an IGBT, and the like. The first transistor 300 may also be a field effect transistor (JFET), such as a Junction Field Effect Transistor (JFET), which is very noisy below one kilohertz, a floating gate transistor, etc. It should be noted that the first transistor 300 is a P-type transistor, and when a high level is input to a gate of the P-type transistor, the source and the drain of the P-type transistor are turned off, and when a low level is input to the gate of the P-type transistor, the source and the drain of the P-type transistor are turned on, so that the circuit is turned on and off. In this embodiment, the specific type and the like of the first transistor 300 are not specifically limited, and only the functions of being turned off at a high level and being turned on at a low level need to be satisfied.
The gate of the second transistor 400 is electrically connected to the source of the first transistor 300, the source of the second transistor 400 is grounded, and the second transistor 400 is an N-type transistor. The second transistor 400 may be a Bipolar Junction Transistor (BJT) that provides a certain transconductance and output resistance, amplifies a signal, and has a strong power control capability, and high-speed and durable characteristics, and may be a heterojunction bipolar transistor, a darlington transistor, a power diode, an IGBT, and the like. The second transistor 400 may also be a field effect transistor (JFET), a floating gate transistor, etc., but it should be noted that the second transistor 400 is an N-type transistor, and when a low level is input to a gate of the N-type transistor, the source and the drain of the N-type transistor are turned off, and when a high level is input to the gate of the N-type transistor, the source and the drain of the N-type transistor are turned on, so as to turn on and off the circuit. In this embodiment, specific types and the like of the second transistor 400 are not specifically limited, and only the functions of being turned off at a high level and being turned on at a low level need to be satisfied.
The input end of the microprocessor 600 is electrically connected to the drain of the second transistor 400, the output end of the microprocessor 600 is in signal connection with the display device 500, and the microprocessor 600 is configured to control the display device 500 to display information according to the drain output signal of the second transistor 400. The storage unit in the microprocessor 600 may be pre-stored with display information, and when the microprocessor 600 receives the electrical signal from the drain of the second transistor 400, the microprocessor controls to output the display information to the display device 500 to display the pre-stored display information. When the display information includes a plurality of types, a display sequence is preset, that is, the plurality of types of display information are arranged in the microprocessor 600 in a certain sequence, and the microprocessor 600 outputs one type of display information according to the display sequence each time it receives the drain output signal of the second transistor 400, thereby implementing switching output and display of the plurality of types of display information. The microprocessor 600 may be a microprocessor which can be divided into 4 bits, 8 bits, 16 bits, 32 bits, 64 bits, and the like, and the present embodiment does not limit the types of the microprocessor 600 at all, and may be specifically selected according to actual situations, and only needs to satisfy the function of controlling the display device 500 to display information according to the drain output signal of the second transistor 400.
The working principle of the display device control circuit 10 provided in this embodiment is as follows:
the display device control circuit 10 provided by the present embodiment includes: the switch element 100, the first capacitor element 200, the first transistor 300, the second transistor 400, and the microprocessor 600. During the charging process, a large amount of charges are accumulated through the first capacitor assembly 200, so that the two ends of the first capacitor assembly 200 have a higher voltage, and the switch assembly 100 is connected in parallel with the first capacitor assembly 200, so that the two ends of the switch assembly 100 also have the same voltage. When the switching element 100 is turned off, both ends of the switching element 100 also have the same potential, and thus the second end of the switching element 100 also has a high level potential. The second terminal of the switch element 100 is electrically connected to the gate of the first transistor 300, the drain of the first transistor 300 is connected to the external power source, and the source of the first transistor 300 is electrically connected to the gate of the second transistor 400. When the switch element 100 is in the off state, the second terminal of the switch element 100, i.e., the gate of the first transistor 300, is a high level signal, and the first transistor 300 is a P-type transistor, and is in the off state, so that the current of the external power cannot flow into the second transistor 400 through the first transistor 300, and the microprocessor 600 does not receive any signal, and thus the display device 500 is also in the non-operating state.
When the switch assembly 100 is closed, the second terminal of the switch assembly 100 is grounded, the current passing through the switch assembly 100 is conducted to the ground through the second terminal, so that both ends of the switch component 100 are at a low voltage level, the second end of the switch component 100 is a low voltage signal, that is, the gate of the first transistor 300 is a low voltage signal, thus, the source and drain of the first transistor 300 are turned on, the external power flows to the gate of the second transistor 400 through the transistor, the second transistor 400 is an N-type transistor, which is turned on by a high level signal, and outputs a low level signal at the drain, and the microprocessor 600 receives the low level signal output from the drain of the second transistor 400 and controls the display device 500 to display information.
The display device control circuit 10 provided in the embodiment of the present application includes the switch element 100, the first capacitor element 200, the first transistor 300, the second transistor 400, and the microprocessor 600. By connecting the switch assembly 100 in parallel with the first capacitor assembly 200, when the switch assembly 100 is turned off, the first capacitor assembly 200 is in a high voltage state, and the display device 500 cannot be started to operate through the first transistor 300, the second transistor 400 and the microprocessor 600. Meanwhile, the first end of the switch assembly 100 is grounded, at the moment when the switch assembly 100 is closed, the first capacitor assembly 200 discharges slowly, and the first end of the switch assembly 100 is grounded, so that a generated instantaneous current conducting wire is grounded, and the working performance of the display device is prevented from being influenced by the generated instantaneous current and the like. The present embodiment solves the technical problem existing in the conventional technology that the working performance of the display device 500 is poor by providing the display device control circuit 10, and achieves the technical effect of improving the working performance of the display device 500.
In one embodiment, the switch assembly 100 includes a micro switch having a first terminal connected to ground and a second terminal electrically connected to the gate of the first transistor 300. The microswitch is also called a sensitive switch or a quick-acting switch, and can use a tiny external force to act on the action reed through the transmission element so as to quickly connect or disconnect the fixed contact and the movable contact at the tail end of the microswitch. The microswitch is sensitive in action and convenient to use, and can greatly improve the working sensitivity of the display equipment control circuit. The micro switch may be a single-link type, a duplex type or a multiple-link type, and this embodiment is not particularly limited, and may be specifically selected according to actual conditions.
Referring to fig. 4, in an embodiment, the display device control circuit 10 further includes: a first diode element 710, a second capacitor element 720, and a first resistor element 730.
The anode of the first diode element 710 is electrically connected to the second terminal, and the cathode of the first diode element 710 is electrically connected to the gate of the first transistor 300, so as to prevent current from flowing back to the first capacitor element 200 or the switch element 100 after the first transistor 300 is turned on, thereby affecting the circuit performance. The first diode component 710 may include one or more diodes, and when the number of the diodes is multiple, the diodes are connected in series or in parallel in the same direction. In this embodiment, the second diode assembly 840 is not particularly limited, and only needs to satisfy the function of unidirectional conduction.
One end of the second capacitor element 720 is electrically connected to the drain of the first transistor 300, and the other end is electrically connected to the source of the second transistor 400, and the second capacitor element 720 is used for stabilizing voltage to protect the first transistor 300 and the second transistor 400, so as to prevent the voltage change speed from being too fast at the moment of power on and power off, thereby generating reverse current or induced current to affect the working performance of other electronic devices in the circuit and the working stability of the circuit. The second capacitor assembly 720 may include one or more capacitors, and when there are a plurality of capacitors, the plurality of capacitors may be connected in series or in parallel, and the capacitance value, the connection mode, and the like of the capacitor are not limited in any way in this embodiment, and may be specifically selected according to actual situations.
One end of the first resistor assembly 730 is electrically connected to the gate of the second transistor 400, and the other end is electrically connected to the source of the second transistor 400. The first resistor 730 is used for shunting current to prevent the current in the circuit from being too large to damage the second transistor 400, thereby affecting the operation stability of the display device control circuit 10. The first resistive component 730 may include one or more resistors, and when the first resistive component 730 includes a plurality of resistors, the plurality of resistors are connected in series. In this embodiment, the type and the resistance of the first resistor assembly 730 are not limited, and may be specifically selected or set according to actual conditions, and only the function of shunting is required.
Referring to fig. 5, in an embodiment, the display device control circuit 10 further includes: a boost circuit 800.
The input terminal of the voltage boost circuit 800 is used for connecting the external power supply, the output terminal of the voltage boost circuit 800 is electrically connected to the drain of the first transistor 300, and the voltage boost circuit 800 is used for boosting the voltage of the external power supply to the operating voltage of the first transistor 300 to adapt to different first transistors 300, thereby expanding the application range of the display device control circuit 10 of the present embodiment. The boosting circuit 800 of this embodiment is not limited, and may be specifically selected or designed according to actual situations, and only needs to satisfy the function of boosting the voltage of the external power source.
In one embodiment, the boost circuit 800 includes an inductive component 810, a third capacitive component 820, a third transistor 830, and a second diode component 840.
One end of the inductance assembly 810 is electrically connected to the external power supply, and the inductance assembly 810 is used as an energy storage component in the boost circuit 800 for storing energy. During the discharging process, the inductive element 810 discharges to the third capacitive element 820, and discharges to the load through the third capacitive element 820. The inductance assembly 810 may include one inductance or a plurality of inductances, and when the inductance assembly 810 includes a plurality of inductances, the plurality of inductances are connected in series. In this embodiment, the type and the inductance of the inductance component 810 are not limited at all, and may be specifically limited according to actual situations.
The third capacitor assembly 820 is connected in parallel with the inductor assembly 810, and a common terminal of the inductor assembly 810 and the third capacitor assembly 820 is electrically connected to the drain of the first transistor 300. The input voltage of the external power source and the voltage generated by the inductance component 810 are mutually superposed to charge the third capacitance component 820, the third capacitance component 820 outputs power to a load, and the output end of the third capacitance component 820 is the boosted voltage.
A gate of the third transistor 830 is electrically connected to one end of the third capacitor element 820, a drain of the third transistor 830 is electrically connected to the inductor element 810 and the drain of the first transistor 300, a source of the third transistor 830 is grounded, and the third transistor 830 is a P-type transistor. The third transistor 830 is used as a power switch to control the charging and discharging of the inductive component 810. When the third transistor 830 is turned on, the inductor is in a charged state, and when the third transistor 830 is turned off, the inductor component 810 is in a discharged state. The third transistor 830 may be an IGBT or an MOS transistor, and the present embodiment is not limited at all, and may be specifically selected according to actual situations.
The anode of the second diode assembly 840 is electrically connected to the common terminal of the inductor assembly 810 and the third capacitor assembly 820, and the cathode of the diode assembly is electrically connected to the drain of the first transistor 300. The second diode assembly 840 is used for freewheeling and controlling the current flow direction to prevent the load current from flowing back into the boost circuit 800. The second diode assembly 840 may include one or more diodes, and when the number of the diodes is plural, the plurality of diodes are connected in series with each other. It should be noted that, in the present embodiment, the diode may be a fast recovery diode or a schottky diode. In this embodiment, the number, the type, and the like of the second diode assemblies 840 are not limited at all, and may be specifically selected according to actual situations.
Referring to fig. 6, an embodiment of the present application provides a five-prevention lockout system 20 comprising: a five-prevention locking device 21, a display device 500 and the display device control circuit 10.
The primary equipment in the power grid of the five-prevention locking device 21 is electrically connected, and the display equipment 500 is arranged on the five-prevention locking device 21. The five-prevention locking device 21 is an electrical device used in a substation to protect various electrical devices, lines, and the like in the substation from misoperation. The five-prevention locking device 21 may be a mechanical locking device, which may perform locking of sequential actions between operating parts of a switch cabinet or an outdoor knife switch by using mechanical mechanisms that are restricted and linked with each other. The mechanical locking device can realize automatic step-by-step unlocking according to an operation sequence without using auxiliary operations such as keys and the like in the operation process, and can realize automatic locking and prevent misoperation when misoperation occurs. The mechanical locking device can meet the requirements of forward locking and reverse locking, and has the advantages of visual locking, low possibility of damage, small overhauling workload, convenience in operation and the like. The five-prevention locking device 21 can also be a program lock, an electric interlock, an electromagnetic lock and the like. The five-prevention locking device 21 may include a housing made of an insulating material, a receiving cavity is formed in the housing, and hardware devices such as an operating mechanism of the five-prevention locking device 21 are disposed in the receiving cavity. In this embodiment, the five-prevention locking device 21 is not limited at all, and only the function of preventing the misoperation of various electrical devices in the substation needs to be satisfied.
The display device 500 is disposed on the surface of the five-prevention locking device 21, and is configured to display different information, such as operation prompt information, field device working state information, field temperature information, and the like. When there are a plurality of display devices 500, the plurality of display devices 500 may be in signal connection with the microprocessor 600 respectively to display different types of information respectively. The display device 500 may be a liquid crystal display, a CRT display, and the display device 500 may also be an electronic paper display, where a display screen of the electronic paper display does not need a backlight source, and has bistability and higher display stability than the common display device 500. When the electronic paper display displays static images, power does not need to be supplied to the display screen continuously, power consumption is completely avoided, and ultra-low power consumption is achieved. The electronic paper display only needs to supply power when the display screen needs to be switched, so that the service life of a power supply battery is prolonged.
The input end of the microprocessor 600 is electrically connected to the drain of the second transistor 400, the microprocessor 600 is in signal connection with the display device 500, and the microprocessor 600 controls the display device 500 to display information according to the output signal of the drain of the second transistor 400. The beneficial effects of the display device control circuit 10 have been described in detail in the above embodiments, and are not described in detail herein.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A display device control circuit for controlling operation of a display device, the display device control circuit comprising:
the switch assembly comprises a first end and a second end, and the first end is grounded;
a first capacitive component connected in parallel with the switching component;
the grid electrode of the first transistor is electrically connected with the second end, the drain electrode of the first transistor is used for being connected with an external power supply, and the first transistor is a P-type transistor;
a gate of the second transistor is electrically connected with a source of the first transistor, a source of the second transistor is grounded, and the second transistor is an N-type transistor;
the input end of the microprocessor is electrically connected with the drain electrode of the second transistor, the output end of the microprocessor is in signal connection with the display equipment, and the microprocessor is used for controlling the display equipment to display information according to the drain electrode output signal of the second transistor.
2. The display device control circuit according to claim 1, wherein the switch assembly comprises a micro switch, a first terminal of the micro switch is connected to ground, and a second terminal of the micro switch is electrically connected to the gate of the first transistor.
3. The display device control circuit according to claim 1, further comprising:
and the anode of the first diode component is electrically connected with the second end, and the cathode of the first diode component is electrically connected with the grid electrode of the first transistor.
4. The display device control circuit according to claim 1, further comprising:
and one end of the second capacitor component is electrically connected with the drain electrode of the first transistor, and the other end of the second capacitor component is electrically connected with the source electrode of the second transistor.
5. The display device control circuit according to claim 1, further comprising:
and one end of the first resistor component is electrically connected with the grid electrode of the second transistor, and the other end of the first resistor component is electrically connected with the source electrode of the second transistor.
6. The display device control circuit according to claim 1, further comprising:
and the input end of the booster circuit is used for being connected with the external power supply, and the output end of the booster circuit is electrically connected with the drain electrode of the first transistor.
7. The display device control circuit according to claim 6, wherein the voltage boosting circuit comprises:
the inductance assembly is used for connecting the external power supply at one end;
and the common end of the inductance component and the third capacitance component is electrically connected with the drain electrode of the first transistor.
8. The display device control circuit according to claim 7, wherein the voltage boosting circuit further comprises:
a gate of the third transistor is electrically connected to one end of the third capacitor element away from the inductor element, a drain of the third transistor is electrically connected to the drain of the first transistor through the inductor element, a source of the third transistor is grounded, and the third transistor is a P-type transistor; a GDR drive signal is present at the gate of the third transistor.
9. The control circuit of claim 3, wherein the first diode component comprises one or more diodes, and when the first diode component comprises a plurality of diodes, the plurality of diodes are connected in series or in parallel in the same direction.
10. A five-prevention lockout system, comprising:
the five-prevention locking device is used for connecting primary equipment;
the display equipment is arranged on the five-prevention locking device;
the display device control circuit according to any one of claims 1 to 9, wherein an input terminal of the microprocessor is electrically connected to a drain of the second transistor, the microprocessor is in signal connection with the display device, and the microprocessor is configured to control the display device to display information according to an output signal from the drain of the second transistor.
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| CN202010574264.3A CN111864616B (en) | 2020-06-22 | 2020-06-22 | Display device control circuit and five-prevention locking system |
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