CN220732732U - Oscillating circuit applied to inductive high-precision analog quantity sensor - Google Patents
Oscillating circuit applied to inductive high-precision analog quantity sensor Download PDFInfo
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- CN220732732U CN220732732U CN202322091505.0U CN202322091505U CN220732732U CN 220732732 U CN220732732 U CN 220732732U CN 202322091505 U CN202322091505 U CN 202322091505U CN 220732732 U CN220732732 U CN 220732732U
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- 239000003990 capacitor Substances 0.000 claims abstract description 36
- 230000000903 blocking effect Effects 0.000 claims abstract description 34
- 230000010355 oscillation Effects 0.000 claims description 25
- 238000001514 detection method Methods 0.000 abstract description 4
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- 230000005672 electromagnetic field Effects 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 238000003199 nucleic acid amplification method Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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Abstract
The oscillating circuit applied to the inductance type high-precision analog quantity sensor comprises an LC oscillating module, a negative resistance feedback module, a positive feedback excitation source and a signal acquisition module, wherein the negative resistance feedback module is connected with the LC oscillating module, the positive feedback excitation source is connected with the LC oscillating module, the negative resistance feedback module is connected with the positive feedback excitation source, the signal acquisition module is connected with the negative resistance feedback module, the negative resistance feedback module is connected with the LC oscillating module, the positive feedback excitation source is connected with the LC oscillating module, the negative resistance feedback module is connected with the positive feedback excitation source, the positive feedback excitation source is connected with the LC oscillating module, and the signal acquisition module is connected with the negative resistance feedback module through blocking capacitors. The oscillating circuit applied to the inductance type high-precision analog quantity sensor provided by the utility model has the advantages that the inductance type analog quantity sensor has extremely high signal stability and extremely high detection precision by arranging the plurality of blocking capacitors in the circuit, and the oscillating circuit is suitable for popularization and use.
Description
Technical Field
The utility model relates to the technical field of sensors, in particular to an oscillating circuit applied to an inductive high-precision analog quantity sensor.
Background
The inductive analog sensor is a device for converting a distance into an analog quantity, the inductive sensor utilizes an inductance coil at the front end of an induction surface to generate a high-frequency oscillating electromagnetic field, when the high-frequency oscillating electromagnetic field meets a target object made of a metal material, eddy currents which are opposite to each other are ready on the surface of the metal target object, the eddy currents can inhibit the electromagnetic field oscillation in the inductance coil, and the closer the target object is, the stronger the inhibition degree is.
At present, the distance measurement precision of the inductance type analog quantity sensor in the market is low, and the output analog quantity signal is unstable. Therefore, there is a strong need for a high-precision inductance analog sensor, but the most central is also an oscillation processing circuit with excellent performance. At present, in the inductance type analog quantity sensor in the market, signals in an oscillating circuit are consumed to a certain extent in the process of analog quantity signal acquisition; and a strong signal is supplied to the inductor coil with an uncertain excitation current, resulting in unstable fluctuation of the amplitude of the high-frequency oscillation signal in the inductor coil
Therefore, in order to solve the above-mentioned problems, it is necessary to design an oscillating circuit applied to an inductance type high-precision analog sensor.
Disclosure of Invention
To overcome the above-mentioned drawbacks of the prior art, an object of the present utility model is to provide an oscillating circuit for use in an inductive high-precision analog sensor.
To achieve the above and other related objects, the present utility model provides the following technical solutions: the oscillating circuit applied to the inductance type high-precision analog quantity sensor comprises an LC oscillating module, a negative resistance feedback module, a positive feedback excitation source and a signal acquisition module, wherein the negative resistance feedback module is connected with the LC oscillating module, the positive feedback excitation source is connected with the LC oscillating module, the negative resistance feedback module is connected with the positive feedback excitation source, the signal acquisition module is connected with the negative resistance feedback module, and the negative resistance feedback module is connected with the LC oscillating module, the positive feedback excitation source is connected with the LC oscillating module, the negative resistance feedback module is connected with the positive feedback excitation source, and the signal acquisition module is connected with the negative resistance feedback module through blocking capacitors.
The preferable technical scheme is as follows: the positive feedback module is connected with the LC oscillation module through the second blocking capacitor, the negative resistance feedback module is connected with the positive feedback excitation source through the third blocking capacitor, and the signal acquisition module is connected with the negative resistance feedback module through the fourth blocking capacitor; the LC oscillation module is connected with the first blocking capacitor and the second blocking capacitor through the temperature compensation network.
The preferable technical scheme is as follows: the high-precision voltage reference source is connected with the positive feedback excitation source.
Due to the application of the technical scheme, the utility model has the following beneficial effects:
the oscillating circuit applied to the inductance type high-precision analog quantity sensor provided by the utility model is characterized in that a temperature compensation network and an LC oscillating module are connected in series, and a negative resistance feedback module carries out nondestructive acquisition on signals in the LC oscillating module through a blocking capacitor; the negative resistance feedback module carries out follow amplification on the collected LC oscillating circuit signal, and gives a fierce signal to the positive feedback excitation source through the blocking capacitor, and the process has no signal loss; the reference power supply signal of the positive feedback excitation source is provided by a high-precision voltage reference source, the positive feedback excitation source transmits the signal given by the collected negative resistance feedback module to the LC oscillation module through a value-separating capacitor, and the process has no signal loss; the signal acquisition module carries out nondestructive acquisition on the high-frequency oscillation signal in the negative resistance feedback module through the blocking capacitor, and the process has no loss of the signal; the high-frequency oscillation signal in the negative resistance feedback module and the LC oscillation signal in the vibration head are the same-frequency and same-phase oscillation, and the amplitude is amplified and reduced in equal proportion with the amplitude in the LC oscillation module; the structure enables the inductance type analog quantity sensor to have extremely high signal stability and extremely high detection precision.
Drawings
Fig. 1 is a block diagram of an oscillating circuit according to the present utility model.
Detailed Description
Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present utility model, which is described by the following specific examples.
Please refer to fig. 1. It should be noted that, in the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or directions or positional relationships in which the inventive product is conventionally put in use, are merely for convenience of describing the present utility model and for simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," "overhang," and the like do not denote that the component is required to be absolutely horizontal or overhang, but may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediary, or communicating between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
According to one general technical concept of the utility model, an oscillating circuit applied to an inductance type high-precision analog quantity sensor is provided, and the oscillating circuit comprises an LC oscillating module 1, a negative resistance feedback module 8, a positive feedback excitation source 5 and a signal acquisition module 10, wherein the negative resistance feedback module 8 is connected with the LC oscillating module 1, the positive feedback excitation source 5 is connected with the LC oscillating module 1, the negative resistance feedback module 8 is connected with the positive feedback excitation source 5, the signal acquisition module 10 is connected with the negative resistance feedback module 8, and the negative resistance feedback module 8 and the LC oscillating module 1, the positive feedback excitation source 5 and the LC oscillating module 1, the negative resistance feedback module 8 and the positive feedback excitation source 5 and the signal acquisition module 10 and the negative resistance feedback module 8 are all connected through blocking capacitors. According to the method, the blocking capacitor is arranged on the signal transmission part in the oscillating circuit, so that no loss exists in the signal transmission process, the high-frequency oscillating signal in the negative resistance feedback module 8 and the LC oscillating signal in the oscillating head are in the same-frequency and same-phase oscillation, and the amplitude is amplified and reduced in equal proportion with the amplitude in the LC oscillating module 1; the structure enables the inductance type analog quantity sensor to have extremely high signal stability and extremely high detection precision.
Fig. 1 shows a block diagram of an oscillating circuit according to an exemplary embodiment of the present utility model.
As shown in fig. 1, in an exemplary embodiment of the present utility model, an oscillating circuit applied to an inductance type high-precision analog sensor is disclosed, which includes an LC oscillating module 1, a negative resistance feedback module 8, a positive feedback excitation source 5 and a signal collecting module 10, wherein the negative resistance feedback module 8 is connected to the LC oscillating module 1, the positive feedback excitation source 5 is connected to the LC oscillating module 1, the negative resistance feedback module 8 is connected to the positive feedback excitation source 5, the signal collecting module 10 is connected to the negative resistance feedback module 8, between the negative resistance feedback module 8 and the LC oscillating module 1, between the positive feedback excitation source 5 and the LC oscillating module 1, between the negative resistance feedback module 8 and the positive feedback excitation source 5, and between the signal collecting module 10 and the negative resistance feedback module 8 are all connected through blocking capacitors.
As shown in fig. 1, in the illustrated embodiment, the blocking capacitor includes a first blocking capacitor 3, a second blocking capacitor 4, a third blocking capacitor 7 and a fourth blocking capacitor 9, the negative resistance feedback module 8 is connected with the LC oscillation module 1 through the first blocking capacitor 3, the positive feedback excitation source 5 is connected with the LC oscillation module 1 through the second blocking capacitor 4, the negative resistance feedback module 8 is connected with the positive feedback excitation source 5 through the third blocking capacitor 7, and the signal acquisition module 10 is connected with the negative resistance feedback module 8 through the fourth blocking capacitor 9; the temperature compensation network 2 is further included, and the LC oscillation module 1 is connected with the first blocking capacitor 3 and the second blocking capacitor 4 through the temperature compensation network 2.
As shown in fig. 1, in the illustrated embodiment, a high precision voltage reference source 6 is also included, the high precision voltage reference source 6 being connected to a positive feedback excitation source 5.
Therefore, the utility model has the following advantages:
the oscillating circuit applied to the inductance type high-precision analog quantity sensor provided by the utility model is characterized in that a temperature compensation network and an LC oscillating module are connected in series, and a negative resistance feedback module carries out nondestructive acquisition on signals in the LC oscillating module through a blocking capacitor; the negative resistance feedback module carries out follow amplification on the collected LC oscillating circuit signal, and gives a fierce signal to the positive feedback excitation source through the blocking capacitor, and the process has no signal loss; the reference power supply signal of the positive feedback excitation source is provided by a high-precision voltage reference source, the positive feedback excitation source transmits the signal given by the collected negative resistance feedback module to the LC oscillation module through a value-separating capacitor, and the process has no signal loss; the signal acquisition module carries out nondestructive acquisition on the high-frequency oscillation signal in the negative resistance feedback module through the blocking capacitor, and the process has no loss of the signal; the high-frequency oscillation signal in the negative resistance feedback module and the LC oscillation signal in the vibration head are the same-frequency and same-phase oscillation, and the amplitude is amplified and reduced in equal proportion with the amplitude in the LC oscillation module; the structure enables the inductance type analog quantity sensor to have extremely high signal stability and extremely high detection precision.
The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations which can be accomplished by persons skilled in the art without departing from the spirit and technical spirit of the present utility model shall be covered by the appended claims.
Claims (3)
1. The oscillating circuit applied to the inductance type high-precision analog quantity sensor comprises an LC oscillating module, a negative resistance feedback module, a positive feedback excitation source and a signal acquisition module, wherein the negative resistance feedback module is connected with the LC oscillating module, the positive feedback excitation source is connected with the LC oscillating module, the negative resistance feedback module is connected with the positive feedback excitation source, and the signal acquisition module is connected with the negative resistance feedback module, and the oscillating circuit is characterized in that: the negative resistance feedback module is connected with the LC oscillation module, the positive feedback excitation source is connected with the LC oscillation module, the negative resistance feedback module is connected with the positive feedback excitation source, and the signal acquisition module is connected with the negative resistance feedback module through blocking capacitors.
2. The oscillating circuit for use in an inductive high precision analog sensor of claim 1, wherein: the positive feedback module is connected with the LC oscillation module through the second blocking capacitor, the negative resistance feedback module is connected with the positive feedback excitation source through the third blocking capacitor, and the signal acquisition module is connected with the negative resistance feedback module through the fourth blocking capacitor; the LC oscillation module is connected with the first blocking capacitor and the second blocking capacitor through the temperature compensation network.
3. The oscillating circuit for use in an inductive high precision analog sensor of claim 1, wherein: the high-precision voltage reference source is connected with the positive feedback excitation source.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322091505.0U CN220732732U (en) | 2023-08-04 | 2023-08-04 | Oscillating circuit applied to inductive high-precision analog quantity sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322091505.0U CN220732732U (en) | 2023-08-04 | 2023-08-04 | Oscillating circuit applied to inductive high-precision analog quantity sensor |
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| CN220732732U true CN220732732U (en) | 2024-04-05 |
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| CN202322091505.0U Active CN220732732U (en) | 2023-08-04 | 2023-08-04 | Oscillating circuit applied to inductive high-precision analog quantity sensor |
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2023
- 2023-08-04 CN CN202322091505.0U patent/CN220732732U/en active Active
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