CN109510624B - High-voltage digital-to-analog conversion and inspection device for airborne equipment - Google Patents
High-voltage digital-to-analog conversion and inspection device for airborne equipment Download PDFInfo
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- CN109510624B CN109510624B CN201811231844.1A CN201811231844A CN109510624B CN 109510624 B CN109510624 B CN 109510624B CN 201811231844 A CN201811231844 A CN 201811231844A CN 109510624 B CN109510624 B CN 109510624B
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/10—Calibration or testing
- H03M1/1071—Measuring or testing
- H03M1/1095—Measuring or testing for ac performance, i.e. dynamic testing
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/66—Digital/analogue converters
Abstract
The invention provides a high-voltage digital-to-analog conversion and inspection device for airborne equipment, wherein after a digital signal is input into an adjustable precision reference voltage source, the digital signal enters a high-voltage digital-to-analog conversion circuit from the output end of the adjustable precision reference voltage source, and the output end of the high-voltage digital-to-analog conversion circuit is connected with a high-voltage digital-to-analog conversion result inspection circuit; the invention can ensure the reliability of airborne high-voltage signal conversion, and effectively overcomes the limitation that the digital-to-analog conversion result of the high-voltage signal lacks simple, effective and reliable inspection; the invention has reliable design principle, simple realization of design circuit form and very wide application prospect.
Description
Technical Field
The invention relates to the technical field of airborne equipment, in particular to an airborne signal conversion device.
Background
In the process of signal transmission between airborne equipment, digital-to-analog conversion is in a very important position, and especially, digital-to-analog conversion of high-voltage signals is also performed between partial airborne equipment, which plays a crucial role in completing the established functions of the airborne equipment.
Digital-to-analog conversion in the prior art is mostly low-voltage digital-to-analog conversion, and the digital-to-analog conversion method is only limited to low-voltage digital-to-analog conversion transmission between devices. When needs often comparatively complicated when carrying out digital analog conversion transmission to high voltage machine carried signal, and cause the circuit maladjustment easily to make the circuit appear ending the saturation phenomenon, bring very big limitation for the design, lack simple effectual inspection to the digital analog conversion result of high voltage moreover, especially to the check-up of multichannel high voltage, reduced machine carried equipment high voltage digital analog conversion's reliability. This is a disadvantage of the prior art.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a high-voltage digital-to-analog conversion and inspection device for airborne equipment.
The invention aims to provide a high-voltage digital-to-analog conversion and inspection device for airborne equipment, aiming at the problems that the high-voltage airborne signal is often complex in digital-to-analog conversion and transmission, great design limitation is brought, the high-voltage digital-to-analog conversion result is lack of simple and effective inspection, the reliability of the high-voltage digital-to-analog conversion of the airborne equipment is reduced, and the like, so as to solve the technical problems.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the high-voltage digital-to-analog conversion and inspection device for the airborne equipment comprises an adjustable precision reference voltage source, a high-voltage digital-to-analog conversion circuit and a high-voltage digital-to-analog conversion result inspection circuit, wherein after a digital signal is input into the adjustable precision reference voltage source, the digital signal enters the high-voltage digital-to-analog conversion circuit from the output end of the adjustable precision reference voltage source, and the output end of the high-voltage digital-to-analog conversion circuit is connected with the high-voltage digital-to-analog conversion result inspection circuit;
the adjustable precision reference voltage source comprises a high-precision operational amplifier and a parameter adjustable configuration circuit, and the signal output end of the high-precision operational amplifier is connected with the parameter adjustable configuration circuit; the high-precision operational amplifier and the parameter adjustable configuration circuit generate adjustable precision reference voltage, and the precision reference voltage is used as reference voltage and is sent to the high-voltage digital-to-analog conversion circuit.
The high-voltage digital-to-analog conversion circuit comprises a first-stage digital-to-analog conversion circuit, a channel switching control circuit, a second-stage digital-to-analog conversion circuit and a high-voltage amplification output circuit, wherein the first-stage digital-to-analog conversion circuit is connected with the channel switching control circuit, the output end of the channel switching control circuit is electrically connected with the second-stage digital-to-analog conversion circuit, and the output end of the second-stage digital-to-analog conversion circuit is electrically connected with the high-voltage amplification output circuit; the first-stage digital-to-analog conversion circuit is electrically connected with a parameter adjustable configuration circuit of an adjustable precision reference voltage source, and the high-voltage amplification output circuit outputs to the digital-to-analog conversion result inspection circuit; through each stage of circuits of the high-voltage digital-to-analog conversion circuit, after first-stage digital-to-analog conversion is carried out on high-voltage signals required by an airborne system in sequence, switching control is carried out on channels, amplified high voltage is output after second-stage digital-to-analog conversion is carried out, and finally conversion results are transmitted through driving.
The high-voltage digital-to-analog conversion result detection circuit comprises a window comparison circuit, a check channel control circuit and a check result trigger forming circuit, wherein the output end of the high-voltage amplification output circuit is electrically connected with the window comparison circuit, the output end of the window comparison circuit is connected with the check channel control circuit, and the output end of the check channel control circuit is connected with the check result trigger forming circuit; the high voltage digital-to-analog conversion result is sequentially subjected to switch-on control and trigger formation through a window comparison circuit, a check channel control circuit and a check result trigger formation circuit of the high voltage digital-to-analog conversion result checking circuit, and finally the verification result is transmitted out.
The check channel control circuit is connected with the high-voltage digital-to-analog conversion result check circuit; and verifying the multi-channel high-voltage conversion result by arranging a cascade check channel control circuit.
The invention has the advantages that the high-precision operational amplifier matching parameter adjustable configuration circuit is utilized to generate high-precision reference voltage, and the high-precision reference voltage is transmitted to the high-voltage digital-to-analog conversion circuit to be used as the precision reference voltage of the first-stage digital-to-analog conversion;
the high-voltage signal reference digital signal sent by the airborne equipment is converted into an analog voltage signal by a first-stage digital-to-analog conversion circuit of the high-voltage digital-to-analog conversion circuit, and the analog voltage signal passes through a conversion channel switching control circuit, a second-stage digital-to-analog conversion circuit and a high-voltage amplification output circuit in sequence, so that the high-voltage signal required by the airborne equipment is effectively subjected to digital-to-analog conversion, the conversion channel is effectively controlled, the precision of the digital-to-analog conversion process is controlled, and the digital-to-analog conversion driving output of the high-voltage signal is finally realized;
the conversion control of the airborne high-voltage signals to be converted can be realized through the channel switching control circuit, so that the timely and reliable transmission of the airborne high-voltage signals is ensured;
the airborne high-voltage digital signals can be collected through the second-stage digital-to-analog conversion circuit, and conversion from digital-to-analog conversion current to voltage is achieved by combining high-voltage reference voltage generated by the first-stage digital-to-analog conversion. The conversion from airborne high-voltage digital signals to analog signals is ensured, and the conversion precision is improved;
the high-voltage amplification output circuit can amplify, drive and output the conversion result from the airborne digital signal to the analog signal so as to realize high-voltage signal matching transmission with other airborne equipment;
the high-voltage signal digital-to-analog conversion result can be accurately verified through the high-voltage digital-to-analog conversion result verifying circuit.
Therefore, compared with the prior art, the method and the device can ensure the reliability of airborne high-voltage signal conversion and effectively overcome the limitation that the digital-to-analog conversion result of the high-voltage signal is lack of simple, effective and reliable detection. In addition, the invention has reliable design principle, simple realization of design circuit form and very wide application prospect.
Drawings
Fig. 1 is a schematic circuit block diagram of the high voltage digital-to-analog conversion and inspection method for airborne equipment provided by the invention.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
The invention is a high voltage digital-to-analog conversion and inspection device of airborne equipment; the high-voltage digital-to-analog conversion and inspection method for the airborne equipment not only can effectively perform digital-to-analog conversion on airborne high-voltage signals, but also can improve the digital-to-analog conversion precision and the digital-to-analog conversion reliability, reduce the influence of other airborne signals on the digital-to-analog conversion, and simultaneously can effectively and reliably verify the output result of the high-voltage digital-to-analog conversion.
A high-voltage digital-to-analog conversion and inspection device for airborne equipment comprises an adjustable precision reference voltage source, a high-voltage digital-to-analog conversion circuit and a high-voltage digital-to-analog conversion result inspection circuit, wherein after a digital signal is input into the adjustable precision reference voltage source, the digital signal enters the high-voltage digital-to-analog conversion circuit from the output end of the adjustable precision reference voltage source, and the output end of the high-voltage digital-to-analog conversion circuit is connected with the high-voltage digital-to-analog conversion result inspection circuit;
the adjustable precision reference voltage source comprises a high-precision operational amplifier and a parameter adjustable configuration circuit, and the signal output end of the high-precision operational amplifier is connected with the parameter adjustable configuration circuit; the high-precision operational amplifier and the parameter adjustable configuration circuit generate adjustable precision reference voltage, and the precision reference voltage is used as reference voltage and is sent to the high-voltage digital-to-analog conversion circuit.
The high-voltage digital-to-analog conversion circuit comprises a first-stage digital-to-analog conversion circuit, a channel switching control circuit, a second-stage digital-to-analog conversion circuit and a high-voltage amplification output circuit, wherein the first-stage digital-to-analog conversion circuit is connected with the channel switching control circuit, the output end of the channel switching control circuit is electrically connected with the second-stage digital-to-analog conversion circuit, and the output end of the second-stage digital-to-analog conversion circuit is electrically connected with the high-voltage amplification output circuit; the first-stage digital-to-analog conversion circuit is electrically connected with a parameter adjustable configuration circuit of an adjustable precision reference voltage source, and the high-voltage amplification output circuit outputs to the digital-to-analog conversion result inspection circuit; through the circuits at different levels of the high-voltage digital-to-analog conversion circuit, after the high-voltage signals required by the airborne are subjected to first-level digital-to-analog conversion in sequence, the channels are subjected to switching control, and after the high-voltage signals are subjected to second-level digital-to-analog conversion, amplified high voltage is output, and finally, conversion results are transmitted through driving, so that the defects that in the prior art, the digital-to-analog conversion transmission of the high-voltage airborne signals is complex and the design is limited are overcome.
The high-voltage digital-to-analog conversion result detection circuit comprises a window comparison circuit, a check channel control circuit and a check result trigger forming circuit, wherein the output end of the high-voltage amplification output circuit is electrically connected with the window comparison circuit, the output end of the window comparison circuit is connected with the check channel control circuit, and the output end of the check channel control circuit is connected with the check result trigger forming circuit; through the window comparison circuit, the check channel control circuit and the check result trigger forming circuit of the high-voltage digital-to-analog conversion result checking circuit, the high-voltage digital-to-analog conversion result is sequentially subjected to switch-on control and trigger forming, and finally, the checking result is transmitted out, so that the limitation that simple and effective checking is lacked in the checking of the high-voltage digital-to-analog conversion result in the prior art is solved.
The high-voltage digital-to-analog conversion result checking circuit also comprises a high-voltage window comparison circuit for result verification; the high-voltage window comparison circuit can be used for reliably and accurately verifying the high-voltage conversion result.
The cascade check channel control circuit is connected with the high-voltage digital-to-analog conversion result checking circuit; the multi-channel high-voltage conversion result is verified by arranging the cascade check channel control circuit, the circuit form is simple, and the design is convenient to realize.
As shown in fig. 1, the high voltage digital-to-analog conversion and inspection apparatus for an airborne device provided by the present invention includes an adjustable precision reference voltage source, an output end of the adjustable precision reference voltage source is connected with a high voltage digital-to-analog conversion circuit, the high voltage digital-to-analog conversion circuit is connected with a high voltage digital-to-analog conversion result inspection circuit, and the high voltage digital-to-analog conversion circuit includes:
the digital-to-analog conversion circuit comprises a first-stage digital-to-analog conversion circuit, a channel switching control circuit electrically connected with the first-stage digital-to-analog conversion circuit, a second-stage digital-to-analog conversion circuit electrically connected with the channel switching control circuit, and a high-voltage amplification output circuit electrically connected with the second-stage digital-to-analog conversion circuit. The first-stage digital-to-analog conversion circuit is electrically connected with an adjustable precision reference voltage source, and the high-voltage amplification output circuit is electrically connected with the digital-to-analog conversion result inspection circuit; through the circuits at all levels of the high-voltage digital-to-analog conversion circuit, the first-level digital-to-analog conversion, the channel switching control, the second-level digital-to-analog conversion and the high-voltage output can be sequentially carried out on the airborne required high-voltage signal, and finally, the conversion result is transmitted through the drive, so that the defects that the digital-to-analog conversion transmission of the high-voltage airborne signal is often complex and the design is limited in the prior art are overcome.
In this embodiment, the adjustable precision reference voltage source includes: the high-precision operational amplifier is connected with the output end point of the high-precision operational amplifier and is connected with the parameter adjustable configuration circuit; the high-precision operational amplifier and the parameter adjustable configuration circuit are adopted to generate adjustable precision reference voltage, and the precision voltage is used as reference voltage and is sent to the first-stage digital-to-analog conversion circuit.
In this embodiment, the high voltage digital-to-analog conversion result checking circuit includes: the high-voltage window comparison circuit, the check channel control circuit electrically connected with the high-voltage window comparison circuit point, and the check result trigger forming circuit electrically connected with the output end point of the check channel control circuit; the window comparison circuit is electrically connected with the high-voltage amplification output circuit, and can sequentially conduct switch-on control and trigger formation on the high-voltage digital-to-analog conversion result through all stages of circuits of the high-voltage digital-to-analog conversion result detection circuit, and finally transmit the verification result out, so that the limitation that simple and effective detection is lacked in verification of the high-voltage digital-to-analog conversion result in the prior art is solved. The high-voltage window comparison circuit is arranged, so that the high-voltage conversion result can be verified reliably and accurately, the circuit form is simple, and the design is convenient to realize.
In other embodiments, the channel switching control circuit may also employ switching control having both analog and mechanical functions.
In the technical scheme, the acquired airborne high-voltage control digital signal is combined with the adjustable precision reference voltage source, the two-stage digital-to-analog conversion output is carried out, and the conversion output result is triggered to form a circuit through the window comparison circuit, the cascade type check channel control circuit and the check result to carry out real-time check, so that the defects that the digital-to-analog conversion transmission of the high-voltage airborne signal is complex and the design is limited in the prior art can be overcome. And meanwhile, the conversion result is reliably and accurately verified so as to ensure the reliability of the transmission of the acquired airborne high-voltage signal between the devices.
Claims (2)
1. The utility model provides an airborne equipment high voltage digital-to-analog conversion and verifying attachment which characterized in that:
the high-voltage digital-to-analog conversion and inspection device for the airborne equipment comprises an adjustable precision reference voltage source, a high-voltage digital-to-analog conversion circuit and a high-voltage digital-to-analog conversion result inspection circuit, wherein after a digital signal is input into the adjustable precision reference voltage source, the digital signal enters the high-voltage digital-to-analog conversion circuit from the output end of the adjustable precision reference voltage source, and the output end of the high-voltage digital-to-analog conversion circuit is connected with the high-voltage digital-to-analog conversion result inspection circuit;
the adjustable precision reference voltage source comprises a high-precision operational amplifier and a parameter adjustable configuration circuit, and the signal output end of the high-precision operational amplifier is connected with the parameter adjustable configuration circuit; the high-precision operational amplifier and the parameter adjustable configuration circuit generate adjustable precision reference voltage, and the precision reference voltage is used as reference voltage and is sent to the high-voltage digital-to-analog conversion circuit;
the high-voltage digital-to-analog conversion circuit comprises a first-stage digital-to-analog conversion circuit, a channel switching control circuit, a second-stage digital-to-analog conversion circuit and a high-voltage amplification output circuit, wherein the first-stage digital-to-analog conversion circuit is connected with the channel switching control circuit, the output end of the channel switching control circuit is electrically connected with the second-stage digital-to-analog conversion circuit, and the output end of the second-stage digital-to-analog conversion circuit is electrically connected with the high-voltage amplification output circuit; the first-stage digital-to-analog conversion circuit is electrically connected with a parameter adjustable configuration circuit of an adjustable precision reference voltage source, and the high-voltage amplification output circuit outputs to the digital-to-analog conversion result inspection circuit; sequentially carrying out first-stage digital-to-analog conversion on high-voltage signals required by an airborne machine through each stage of circuits of the high-voltage digital-to-analog conversion circuit, carrying out switching control on channels, outputting amplified high voltage after second-stage digital-to-analog conversion, and finally transmitting a conversion result through driving;
the high-voltage digital-to-analog conversion result detection circuit comprises a window comparison circuit, a check channel control circuit and a check result trigger forming circuit, wherein the output end of the high-voltage amplification output circuit is electrically connected with the window comparison circuit, the output end of the window comparison circuit is connected with the check channel control circuit, and the output end of the check channel control circuit is connected with the check result trigger forming circuit; the high-voltage digital-to-analog conversion result is sequentially subjected to switch-on control and trigger formation through a window comparison circuit, a check channel control circuit and a check result trigger formation circuit of the high-voltage digital-to-analog conversion result checking circuit, and finally, a verification result is transmitted out.
2. The on-board unit high voltage digital-to-analog conversion and verification apparatus according to claim 1, wherein:
the check channel control circuit is connected with the high-voltage digital-to-analog conversion result check circuit; and verifying the multi-channel high-voltage conversion result by arranging a cascade check channel control circuit.
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| CN201811231844.1A CN109510624B (en) | 2018-10-22 | 2018-10-22 | High-voltage digital-to-analog conversion and inspection device for airborne equipment |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005086695A (en) * | 2003-09-10 | 2005-03-31 | Sanyo Electric Co Ltd | Analog-to-digital conversion circuit |
| JP2010045553A (en) * | 2008-08-12 | 2010-02-25 | Yokogawa Electric Corp | Digital-analog conversion module |
| CN101701971A (en) * | 2009-10-24 | 2010-05-05 | 中北大学 | High-precision multichannel analog signal source |
| CN103391098A (en) * | 2013-07-25 | 2013-11-13 | 哈尔滨工业大学 | DAC (digital to analog conversion) circuit with high precision and large-current drive capability |
| CN203950229U (en) * | 2014-07-07 | 2014-11-19 | 南京工业大学 | DC high voltage increasing apparatus based on photoelectric control |
| CN106054092A (en) * | 2016-05-23 | 2016-10-26 | 广东电网有限责任公司佛山供电局 | GIS partial discharge sensor sensitivity tester |
| WO2018129882A1 (en) * | 2017-01-10 | 2018-07-19 | 京东方科技集团股份有限公司 | Digital-to-analog conversion circuit and method, source driver, and display device |
| CN108490382A (en) * | 2018-04-04 | 2018-09-04 | 山东计保电气有限公司 | High-voltage electric energy meter metering plate remote online method of calibration and system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100550102B1 (en) * | 2004-07-16 | 2006-02-08 | 한국전자통신연구원 | A current-steering digital-to-analog converter for 1 bit extension |
-
2018
- 2018-10-22 CN CN201811231844.1A patent/CN109510624B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005086695A (en) * | 2003-09-10 | 2005-03-31 | Sanyo Electric Co Ltd | Analog-to-digital conversion circuit |
| JP2010045553A (en) * | 2008-08-12 | 2010-02-25 | Yokogawa Electric Corp | Digital-analog conversion module |
| CN101701971A (en) * | 2009-10-24 | 2010-05-05 | 中北大学 | High-precision multichannel analog signal source |
| CN103391098A (en) * | 2013-07-25 | 2013-11-13 | 哈尔滨工业大学 | DAC (digital to analog conversion) circuit with high precision and large-current drive capability |
| CN203950229U (en) * | 2014-07-07 | 2014-11-19 | 南京工业大学 | DC high voltage increasing apparatus based on photoelectric control |
| CN106054092A (en) * | 2016-05-23 | 2016-10-26 | 广东电网有限责任公司佛山供电局 | GIS partial discharge sensor sensitivity tester |
| WO2018129882A1 (en) * | 2017-01-10 | 2018-07-19 | 京东方科技集团股份有限公司 | Digital-to-analog conversion circuit and method, source driver, and display device |
| CN108490382A (en) * | 2018-04-04 | 2018-09-04 | 山东计保电气有限公司 | High-voltage electric energy meter metering plate remote online method of calibration and system |
Non-Patent Citations (2)
| Title |
|---|
| "Diagnostic and acceptance tests of AC long lengths high voltage power cables";Parciak Jaroslaw等;《2016 IEEE International Conference on High Voltage Engineering and Application (ICHVE)》;20161229;第1-4页 * |
| "基于OMAP-L138的激光打标机控制系统设计";蓝晓柯等;《科技通报》;20140131;第30卷(第1期);第145-148页 * |
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