CN201993458U - Digital continuously adjustable direct-current resistance system - Google Patents
Digital continuously adjustable direct-current resistance system Download PDFInfo
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- CN201993458U CN201993458U CN2011200273621U CN201120027362U CN201993458U CN 201993458 U CN201993458 U CN 201993458U CN 2011200273621 U CN2011200273621 U CN 2011200273621U CN 201120027362 U CN201120027362 U CN 201120027362U CN 201993458 U CN201993458 U CN 201993458U
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- resistance
- digital
- current resistance
- direct
- precision
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Abstract
The utility model relates to a digital continuously adjustable precision direct-current resistance system, which belongs to the field of use of resistance in direct-current circuits, is based on Ohm's law, employs a microprocessor as a core and ingeniously realizes the function of continuously adjustable precision direct-current resistance by means of closed loop control. The system comprises a man-machine interface, the microprocessor, a DA (digital-to-analog) converter, an operational amplifier, an MOS (metal oxide semiconductor) tube, a precision sampling resistor and an AD (analog-to-digital) converter, and is characterized in that output direct-current resistance is continuously adjustable by the aid of the man-machine interface, and the man-machine interface includes a keyboard, a display and various communication ports. The problem that traditional digital adjustable direct-current resistance is limited in fixed precision resistance range is solved as the output direct-current resistance is continuously adjustable, a circuit is simple and clear, software and hardware are easily realized, and the system is low in manufacturing cost, high in output resistance precision and wide in application.
Description
Technical field
The utility model relates to the digital continuous adjustable direct current resistance system in the calibration and certification field of use field, the especially resistance type sensor of resistance in the DC circuit and resistor-type load.
Background technology
Present known all kinds of ohmmeters, comprising multimeter, relating to the vehicular meter of various resistance type sensors and other various is the instrument of detected object with resistance, all needs to detect calibration before dispatching from the factory.Classic method is to use fixedly that precision resistance detects calibration, and this method all must have corresponding fixed value precision resistance in the point of resistance that each need detect calibration.Along with the development of technology, the point of resistance that needs to detect calibration gets more and more, and uses classic method to need a large amount of fixedly precision resistances, so that detect the cost increase, detection system is huge, detects and carries out inefficiency.Press for a kind of easy to usely, the continuously adjustable precision direct current resistance of output resistance system satisfies current needs.
The utility model content
The purpose of this utility model provides the continuous adjustable direct current resistance of a kind of numeral system, and realizes easy and convenient use.
Concrete design proposal is as follows:
The continuous adjustable direct current resistance of numeral system, comprise man-machine interface, microprocessor, DA digital to analog converter, operational amplifier, metal-oxide-semiconductor, accurate sample resistance and AD analog to digital converter and Control Software, described each electronic component is electrically connected, it is characterized in that, the direct current resistance of output can be realized adjustable continuously by man-machine interface and Control Software, and described man-machine interface comprises keyboard, display and various PORT COM.。
The utility model is core with the microprocessor, and by being the closed-loop control of core with the microprocessor, the output voltage amplitude of constantly regulating described DA digital to analog converter changes described electric current I
D, make output resistance R
OutEqual the resistance value that Control Software will obtain rapidly.The output resistance scope is big, the precision height, and governing speed is fast, exports reliable and stable.
Microprocessor can be chosen fast operation, and as the processor more than 16, DA digital to analog converter and AD analog to digital converter can be chosen the high speed multidigit number, as more than 12.For obtaining the resistance value of wideer stable precision, it is little that metal-oxide-semiconductor can be chosen conduction voltage drop, and it is good that accurate sample resistance can be chosen the precision high stability.
The beneficial effects of the utility model are: the direct current resistance of output is continuously adjustable, solve the adjustable direct current resistance of conventional digital and be subject to the fixedly problem of precision resistance scope, all kinds of ohmmeters have been solved effectively, comprising multimeter, relating to the vehicular meter of various resistance type sensors and other various is the instrument of detected object with resistance, the detection calibration problem before dispatching from the factory, and circuit is simply clear, software and hardware is realized easily, low cost of manufacture, output resistance precision height, purposes is wide.
Description of drawings
Fig. 1 is a system schematic of the present utility model.
Fig. 2 is a process flow diagram of the present utility model.
Fig. 3 is a circuit diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described by embodiment.
Referring to Fig. 1, the continuous adjustable direct current resistance of numeral system comprises man-machine interface 1, microprocessor 2, DA digital to analog converter 3, operational amplifier 4, metal-oxide-semiconductor 5, accurate sample resistance 6, AD analog to digital converter 7 and Control Software 8.For can quick adjustment obtaining the resistance value of stable precision, microprocessor 1 can be chosen fast operation, and as the processor more than 16, DA digital to analog converter 2 and AD analog to digital converter 6 can be chosen the high speed multidigit number, as more than 12.For obtaining the resistance value of wideer stable precision, it is little that metal-oxide-semiconductor 4 can be chosen conduction voltage drop, and it is good that accurate sample resistance 5 can be chosen the precision high stability.
Referring to Fig. 2, the utility model also provides the detection principle and the method for digital continuous adjustable direct current resistance system, and concrete enforcement may further comprise the steps:
101. connection is set;
102. man-machine interface is the target resistance values R that receives
OutSend microprocessor (MCU) to;
103. microprocessor (MCU) is by the value of feedback of running control software in conjunction with analog to digital converter (ADC), regulating and controlling digital to analog converter (DAC) is exported corresponding analog voltage signal;
104. the voltage signal of digital to analog converter (DAC) output carries out voltage follow to improve carrying load ability by operational amplifier;
105. operational amplifier is followed the grid (G) that the voltage signal of output is loaded into metal-oxide-semiconductor, regulates the electric current I that flows through metal-oxide-semiconductor
DDrain voltage V with metal-oxide-semiconductor
D
106. described electric current I
DFlow through sampling resistor R, produce sampled voltage V
R
107. analog to digital converter (ADC) conversion sampled voltage V
RWith drain voltage V
DFeed back to microprocessor (MCU);
108. according to I
D=(V
R-V
D)/R judges V
R/ I
DWhether equal R
Out,, otherwise turn back to step 103 if equal then to enter step 109;
109. output terminal export target analog DC resistance R
Out
Be further elaborated in conjunction with process flow diagram and circuit diagram, described Control Software is according to I
D=(V
R-V
D)/R, R
Out=V
R/ I
D, so R
Out=V
R/ (V
R-V
D) * R, because accurate sample resistance R resistance is very little, so described voltage V
RThe size of value depends primarily on described voltage V
DValue, referring to Fig. 3.According to Ohm law and metal-oxide-semiconductor characteristic, work as I
DIncrease V
RReduce and V
R-V
DIncrease, so R
OutReduce, work as I
DReduce V
RIncrease and V
R-V
DReduce, so R
OutIncrease.By being the closed-loop control of core with the microprocessor, the output voltage amplitude of constantly regulating described DA digital to analog converter changes described electric current I
D, make output resistance R
OutEqual the resistance value that Control Software will obtain rapidly.
Above content is the detailed description of the utility model being done in conjunction with concrete optimal way, can not assert that concrete enforcement of the present utility model is confined to these explanations.Do not breaking away under the utility model design prerequisite, the simple deduction or replace of making all should be considered as originally belonging to protection domain of the present utility model.
Claims (2)
1. the continuous adjustable direct current resistance of numeral system, comprise man-machine interface, microprocessor, DA digital to analog converter, operational amplifier, metal-oxide-semiconductor, accurate sample resistance, AD analog to digital converter, described electronic component is electrically connected, it is characterized in that: the direct current resistance of output is realized adjustable continuously by man-machine interface, described man-machine interface comprises keyboard, display and various PORT COM.
2. the continuous adjustable direct current resistance of numeral according to claim 1 system, it is characterized in that: by being the closed-loop control of core with the microprocessor, the output voltage amplitude of constantly regulating described DA digital to analog converter changes described electric current I
D, make output resistance R
OutEqual the resistance value that will obtain rapidly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200273621U CN201993458U (en) | 2011-01-27 | 2011-01-27 | Digital continuously adjustable direct-current resistance system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200273621U CN201993458U (en) | 2011-01-27 | 2011-01-27 | Digital continuously adjustable direct-current resistance system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201993458U true CN201993458U (en) | 2011-09-28 |
Family
ID=44669944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200273621U Expired - Fee Related CN201993458U (en) | 2011-01-27 | 2011-01-27 | Digital continuously adjustable direct-current resistance system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201993458U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104880963A (en) * | 2014-10-27 | 2015-09-02 | 上海葩星信息科技有限公司 | Resistor simulator |
| CN104914781A (en) * | 2015-04-14 | 2015-09-16 | 常州信息职业技术学院 | Program controlled AC-DC resistance box |
| CN106524842A (en) * | 2016-11-30 | 2017-03-22 | 中国电子科技集团公司第三十八研究所 | Digital self-adaptive direct-current voltage regulating device applied to electronic detonator explosion initiating device |
| CN107037760A (en) * | 2017-05-19 | 2017-08-11 | 北京东方计量测试研究所 | A kind of input current type artifical resistance device and resistance control method |
| CN107145182A (en) * | 2017-05-19 | 2017-09-08 | 北京东方计量测试研究所 | Input voltage pattern intends resistor and resistance control method |
| CN108111172A (en) * | 2017-12-25 | 2018-06-01 | 广州市熙泰自控设备有限公司 | A kind of circuit that digital quantity is converted to resistance output |
| CN108254702A (en) * | 2018-01-25 | 2018-07-06 | 常州同惠电子股份有限公司 | Resistance simulation device based on multiplying-type digital analog converter |
| CN110488728A (en) * | 2019-10-03 | 2019-11-22 | 青岛大学 | Low resistance variable resistance based on analog circuit |
-
2011
- 2011-01-27 CN CN2011200273621U patent/CN201993458U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104880963A (en) * | 2014-10-27 | 2015-09-02 | 上海葩星信息科技有限公司 | Resistor simulator |
| CN104914781A (en) * | 2015-04-14 | 2015-09-16 | 常州信息职业技术学院 | Program controlled AC-DC resistance box |
| CN106524842A (en) * | 2016-11-30 | 2017-03-22 | 中国电子科技集团公司第三十八研究所 | Digital self-adaptive direct-current voltage regulating device applied to electronic detonator explosion initiating device |
| CN107037760A (en) * | 2017-05-19 | 2017-08-11 | 北京东方计量测试研究所 | A kind of input current type artifical resistance device and resistance control method |
| CN107145182A (en) * | 2017-05-19 | 2017-09-08 | 北京东方计量测试研究所 | Input voltage pattern intends resistor and resistance control method |
| CN107145182B (en) * | 2017-05-19 | 2018-11-06 | 北京东方计量测试研究所 | Input voltage pattern intends resistor and resistance control method |
| CN107037760B (en) * | 2017-05-19 | 2019-07-26 | 北京东方计量测试研究所 | A kind of input current type artifical resistance device and resistance control method |
| CN108111172A (en) * | 2017-12-25 | 2018-06-01 | 广州市熙泰自控设备有限公司 | A kind of circuit that digital quantity is converted to resistance output |
| CN108254702A (en) * | 2018-01-25 | 2018-07-06 | 常州同惠电子股份有限公司 | Resistance simulation device based on multiplying-type digital analog converter |
| CN108254702B (en) * | 2018-01-25 | 2020-05-05 | 常州同惠电子股份有限公司 | Resistor simulation device based on multiplication type digital-to-analog converter |
| CN110488728A (en) * | 2019-10-03 | 2019-11-22 | 青岛大学 | Low resistance variable resistance based on analog circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110928 Termination date: 20160127 |
|
| EXPY | Termination of patent right or utility model |