CN114459328A - LVDT/RVDT simulation module output circuit - Google Patents
LVDT/RVDT simulation module output circuit Download PDFInfo
- Publication number
- CN114459328A CN114459328A CN202210091240.1A CN202210091240A CN114459328A CN 114459328 A CN114459328 A CN 114459328A CN 202210091240 A CN202210091240 A CN 202210091240A CN 114459328 A CN114459328 A CN 114459328A
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- lvdt
- rvdt
- signal
- conversion chip
- circuit
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- 238000004088 simulation Methods 0.000 title claims abstract description 25
- 230000005284 excitation Effects 0.000 claims abstract description 40
- 238000006243 chemical reaction Methods 0.000 claims abstract description 31
- 230000001143 conditioned effect Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
Abstract
The invention relates to an LVDT/RVDT simulation module output circuit, which comprises an excitation voltage acquisition circuit and an LVDT/RVDT simulation circuit, wherein an external excitation signal of the excitation voltage acquisition circuit is used as a reference source of a DA conversion chip, the digital end of the DA conversion chip outputs a fixed voltage value, and because the reference source is an alternating current excitation signal, a DA actual output signal and an input excitation voltage signal have the same frequency and direction, and the amplitude of the LVDT/RVDT simulation signal can be changed by changing the DA output voltage value, so that the simulation of the position of a sensor is realized. The circuit is simple to realize, high in control precision and capable of flexibly controlling the displacement value to be continuously scanned and output.
Description
Technical Field
The invention belongs to the technical field of LVDT/RVDT sensors for the field of aviation, and particularly relates to an output circuit of an LVDT/RVDT simulation module.
Background
The LVDT/RVDT sensor is widely applied in the field of aviation, the LVDT/RVDT simulation module is the output of the analog LVDT/RVDT sensor signal, the technology is mature abroad, and has corresponding products, but the price is expensive. At present, the technology in China is immature in China, the precision is low, the self-adaptability of simulation equipment is poor, the use is unchanged, and the like.
Disclosure of Invention
The invention aims to solve the problems and provides an output circuit of an analog LVDT/RVDT sensor, which is simple to realize, high in control precision and capable of flexibly controlling displacement magnitude continuous scanning output.
In order to achieve the purpose, the invention provides the following technical scheme: an output circuit of an LVDT/RVDT simulation module comprises an excitation voltage acquisition circuit and an LVDT/RVDT simulation circuit, wherein the excitation voltage acquisition circuit is provided with an instrument amplifier, an RC filter circuit, an AD637 voltage effective value conversion chip and a 16-bit AD conversion chip, an excitation signal is input into the excitation voltage acquisition circuit, the input excitation signal is conditioned by the instrument amplifier, the input excitation voltage signal of the excitation voltage acquisition circuit is a sinusoidal alternating current signal, the input excitation voltage signal is converted into a direct current signal by the AD637 voltage effective value conversion chip, and the excitation voltage signal is converted into a digital signal by the 16-bit AD conversion chip; the LVDT/RVDT simulation circuit takes an input excitation voltage signal as a reference source of a DA conversion chip, and the digital end of the DA conversion chip outputs a fixed voltage value which is in the same frequency and direction as the input excitation voltage signal.
Further: the AD conversion chip is a 16-bit, 12-bit, 14-bit, 18-bit or 24-bit AD conversion chip;
further: the amplitude of the LVDT/RVDT simulation signal can be changed by changing the output voltage value of the DA conversion chip.
Compared with the prior art, the invention has the beneficial effects that:
the external excitation signal is used as a reference source of the DA conversion chip, the digital end of the DA conversion chip outputs a fixed voltage value, the reference source is an alternating current excitation signal, so that the DA actual output signal and the input excitation voltage signal have the same frequency and direction, and the amplitude of the LVDT/RVDT simulation signal can be changed by changing the DA output voltage value, so that the simulation of the sensor position is realized.
The circuit is simple to realize, high in control precision and capable of flexibly controlling the displacement value to be continuously scanned and output.
Drawings
In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings needed to be used in the description of the embodiment will be briefly introduced below, it is obvious that the drawings in the following description are only for more clearly illustrating the embodiment of the present invention or the technical solution in the prior art, 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 an excitation voltage acquisition circuit of the present invention;
FIG. 2 is a schematic diagram of an LVDT/RVDT simulation circuit according to the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood and implemented by those skilled in the art, the present invention is further described with reference to the following specific examples, which are provided for illustration only and are not intended to limit the present invention.
Fig. 1 shows a specific implementation schematic diagram of an excitation voltage acquisition circuit, which includes an excitation voltage acquisition circuit and an LVDT/RVDT simulation circuit, where the excitation voltage acquisition circuit is provided with an instrument amplifier, an RC filter circuit, an AD637 voltage effective value conversion chip, and a 16-bit AD conversion chip, an input excitation signal is conditioned by the instrument amplifier with high precision and high operating mode rejection ratio to improve input impedance, and the front end of the instrument amplifier is provided with the RC filter circuit to remove interference;
the input excitation voltage signal is a sine alternating current signal, and is converted into direct current through an AD637 voltage effective value conversion chip;
the input excitation voltage is converted into a digital signal by a 16-bit AD conversion chip.
As shown in fig. 2, a schematic diagram of an implementation of an LVDT/RVDT simulation circuit is shown, in which an input excitation signal is used as a reference source of a DA conversion chip, a digital end of the DA conversion chip outputs a fixed voltage value, and since the reference end is an ac excitation voltage signal, the DA output and the input excitation voltage signal have the same frequency and the same direction.
The amplitude of the LVDT/RVDT simulation signal can be changed by changing the output voltage value of the DA conversion chip.
The DA conversion chip is a 16-bit, 12-bit, 14-bit, 18-bit or 24-bit AD conversion chip.
The details of the present invention not described in detail are prior art.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (3)
1. An LVDT/RVDT simulation module output circuit is characterized by comprising an excitation voltage acquisition circuit and an LVDT/RVDT simulation circuit, wherein the excitation voltage acquisition circuit is provided with an instrument amplifier, an RC filter circuit, an AD637 voltage effective value conversion chip and a 16-bit AD conversion chip, an excitation signal is input into the excitation voltage acquisition circuit, the input excitation signal is conditioned by the instrument amplifier, the input excitation voltage signal of the excitation voltage acquisition circuit is a sinusoidal alternating current signal, the input excitation voltage signal is converted into a direct current signal by the AD637 voltage effective value conversion chip, and the excitation voltage signal is converted into a digital signal by the 16-bit AD conversion chip; the LVDT/RVDT simulation circuit takes an input excitation voltage signal as a reference source of a DA conversion chip, and the digital end of the DA conversion chip outputs a fixed voltage value which is in the same frequency and direction as the input excitation voltage signal.
2. The LVDT/RVDT simulation module output circuit according to claim 1, characterized in that the DA conversion chip is a 16-bit, 12-bit, 14-bit, 18-bit or 24-bit AD conversion chip.
3. The LVDT/RVDT simulation module output circuit according to claim 1, characterized in that the amplitude of the LVDT/RVDT simulation signals can be changed by changing the output voltage value of the DA conversion chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210091240.1A CN114459328A (en) | 2022-01-26 | 2022-01-26 | LVDT/RVDT simulation module output circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210091240.1A CN114459328A (en) | 2022-01-26 | 2022-01-26 | LVDT/RVDT simulation module output circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114459328A true CN114459328A (en) | 2022-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210091240.1A Pending CN114459328A (en) | 2022-01-26 | 2022-01-26 | LVDT/RVDT simulation module output circuit |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4463605A (en) * | 1982-05-18 | 1984-08-07 | The Boeing Company | Simulator circuit for electrohydraulically controlled aircraft surfaces |
| US5708368A (en) * | 1996-03-07 | 1998-01-13 | Ade Corporation | Method and apparatus for emulation of a linear variable differential transducer by a capacitive gaging system |
| CN101565138A (en) * | 2009-05-18 | 2009-10-28 | 天津大学 | Discrete self-charging elevator energy feedback device |
| CN106773786A (en) * | 2016-12-27 | 2017-05-31 | 北京润科通用技术有限公司 | A kind of RVDT signal simulations circuit, method and device |
| JP6667750B1 (en) * | 2018-11-16 | 2020-03-18 | 大西 徳生 | DC-DC converter |
| KR20210128239A (en) * | 2020-04-16 | 2021-10-26 | 한국수력원자력 주식회사 | Diagnostic appratus for lvdt |
-
2022
- 2022-01-26 CN CN202210091240.1A patent/CN114459328A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4463605A (en) * | 1982-05-18 | 1984-08-07 | The Boeing Company | Simulator circuit for electrohydraulically controlled aircraft surfaces |
| US5708368A (en) * | 1996-03-07 | 1998-01-13 | Ade Corporation | Method and apparatus for emulation of a linear variable differential transducer by a capacitive gaging system |
| CN101565138A (en) * | 2009-05-18 | 2009-10-28 | 天津大学 | Discrete self-charging elevator energy feedback device |
| CN106773786A (en) * | 2016-12-27 | 2017-05-31 | 北京润科通用技术有限公司 | A kind of RVDT signal simulations circuit, method and device |
| JP6667750B1 (en) * | 2018-11-16 | 2020-03-18 | 大西 徳生 | DC-DC converter |
| KR20210128239A (en) * | 2020-04-16 | 2021-10-26 | 한국수력원자력 주식회사 | Diagnostic appratus for lvdt |
Non-Patent Citations (1)
| Title |
|---|
| 金超武;徐龙祥;: "差动变压器式位移传感器及其在磁悬浮轴承中的应用", 机械工程学报, no. 11, 15 November 2009 (2009-11-15) * |
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