CN2702317Y - Resistance instrument scaling method calibration circuit - Google Patents

Resistance instrument scaling method calibration circuit Download PDF

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Publication number
CN2702317Y
CN2702317Y CN 200320113337 CN200320113337U CN2702317Y CN 2702317 Y CN2702317 Y CN 2702317Y CN 200320113337 CN200320113337 CN 200320113337 CN 200320113337 U CN200320113337 U CN 200320113337U CN 2702317 Y CN2702317 Y CN 2702317Y
Authority
CN
China
Prior art keywords
resistance
resistor
measured
voltage
digital voltmeter
Prior art date
Application number
CN 200320113337
Other languages
Chinese (zh)
Inventor
赵军
王卓
刘文芳
朱卫民
杨明镜
Original Assignee
赵军
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 赵军 filed Critical 赵军
Priority to CN 200320113337 priority Critical patent/CN2702317Y/en
Application granted granted Critical
Publication of CN2702317Y publication Critical patent/CN2702317Y/en

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Abstract

The utility model discloses a resistance instrument scaling method calibration circuit, comprising a standard resistor R < N > and a measured resistor R < X>. The standard resistor R < N > and the measured resistor R < X> connect in series and concatenate a constant-current source. A potential terminal of the standard resistor R < N > is connected with a standard voltage measurement terminal of a digital voltmeter; a potential terminal of the measured resistor R < X> is connected with an input voltage measurement terminal of the digital voltmeter. Provided voltage across the R < N > is U< N >, voltage across the measure resistor R <X> is U < X> and a constant current is I, and then U< N > =I .R < N >, U< X> =I .R < X>; the displayed value of the digital voltmeter is K: K =U< X> / U< N > =R < X> / R < N >, and then the electrical resistance of the measured resistor can be worked out: R < X> =K .R < N >. The utility model is of simple structure, easy manipulation, broad measured range and high certainty of measurement, which can be widely used for resistance measuring of bridge and electric resistance box.

Description

Resistance quasi-instrument rule of three calibrating circuit
Technical field:
The utility model relates to a kind of calibrating circuit, the circuit of resistance quasi-instrument rule of three calibrating specifically.
Background technology:
Along with development and national economy, electric bridge, resistance box constant resistance quasi-instrument have obtained using widely in industrial and agricultural production and scientific research, accurate and the degree of reliability of its transmission of quantity value is directly connected to produces and the scientific research result, therefore seem important day by day, and the calibration method of traditional resistance quasi-instrument is a bridge method, finishes by adjusting bridge balance, manual record data during detection, and verification process is usually interrupted, working strength is big, efficient is low, also introduces personal error simultaneously easily.Extensive utilization along with computing machine, the raising of digitizing, automaticity and universal, at present aspect Measuring and testing, all trending towards realizing computer assisted automatic measurement both at home and abroad, and, be mostly to utilize the high accuracy number multimeter directly to detect for the automatic detection of resistance quasi-instrument, again by computer data acquisition and handle the detection that realizes semi-automation, these class methods require the measuring accuracy of digital watch enough high when surveying the higher resistance quasi-instrument of precision on the one hand; Be subjected to the limitation of digital watch performance on the other hand at aspects such as measurement range, stability, thereby restricted applying of intelligent detecting method.
Summary of the invention:
The utility model is exactly to provide a kind of resistance quasi-instrument rule of three simple and convenient, that measuring accuracy is high, measurement range is wide to examine and determine circuit at above deficiency.
Technical solution adopted in the utility model is:
A kind of resistance quasi-instrument rule of three calibrating circuit comprises measuring resistance R N, measured resistance R X, it is characterized in that: measuring resistance R NWith measured resistance R XBe connected in series, and be connected in series a constant current source, measuring resistance R NVoltage terminal connect the normal voltage measurement terminal of digital voltmeter, measured resistance R XVoltage terminal connect the input voltage measurement terminal of digital voltmeter.
If R NThe voltage at two ends is U N, R XThe voltage at two ends is U X, by measuring resistance R NWith measured resistance R XSteady current be I, then: U N=IR N, U X=IR X, the displayed value K of digital voltmeter:
K=U X/ U N=R X/ R N, then can get the resistance value of measured resistance: R X=KR N
The beneficial effect that the utility model can reach is:
1, the utility model is simple in structure, easy to operate, measurement range is wide, can cover electric bridge, the whole measurement range of resistance box;
2, the utility model is reduced to minimum level with personal error, has improved work efficiency and measuring accuracy greatly.
Description of drawings:
Fig. 1 is circuit theory diagrams of the present utility model;
Embodiment:
The utility model will be further described below in conjunction with accompanying drawing:
As shown in Figure 1: this resistance quasi-instrument rule of three calibrating circuit comprises measuring resistance R N, measured resistance R X, measuring resistance R NWith measured resistance R XBe connected in series, and be connected in series a constant current source, measuring resistance R NCan be according to measured resistance R XSize carry out match selection, measuring resistance R NVoltage terminal connect the normal voltage measurement terminal of digital voltmeter, measured resistance R XVoltage terminal connect the input voltage measurement terminal of digital voltmeter.Digital voltmeter is the data that record input computing machine, monitored automatically, verification automatically, write down automatically and carry out judgment processing by compiled software.
If R NThe voltage at two ends is U N, R XThe voltage at two ends is U X, by measuring resistance R NWith measured resistance R XSteady current be I, then: U N=IR N, U X=IR X, the displayed value K of digital voltmeter:
K=U X/ U N=R X/ R NBut, the resistance value of measured resistance: R then X=KR N
According to above-mentioned principle of work, the resistance value and ten that can examine and determine resistance box, electric bridge measured point is easily advanced the resistance value that adds up of dish, and the precision height of measuring, adopt 6 half digital watch can reach in the past the measuring accuracy of 8 half digital watch, measurement range is wide, has solved the problem that common Intelligent Measurement resistance quasi-instrument is restricted in excessive and too small resistance detection.

Claims (1)

1, a kind of resistance quasi-instrument rule of three calibrating circuit comprises measuring resistance R N, measured resistance R X, it is characterized in that: measuring resistance R NWith measured resistance R XBe connected in series, and be connected in series a constant current source, measuring resistance R NVoltage terminal connect the normal voltage measurement terminal of digital voltmeter, measured resistance R XVoltage terminal connect the input voltage measurement terminal of digital voltmeter.
CN 200320113337 2003-12-02 2003-12-02 Resistance instrument scaling method calibration circuit CN2702317Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200320113337 CN2702317Y (en) 2003-12-02 2003-12-02 Resistance instrument scaling method calibration circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200320113337 CN2702317Y (en) 2003-12-02 2003-12-02 Resistance instrument scaling method calibration circuit

Publications (1)

Publication Number Publication Date
CN2702317Y true CN2702317Y (en) 2005-05-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200320113337 CN2702317Y (en) 2003-12-02 2003-12-02 Resistance instrument scaling method calibration circuit

Country Status (1)

Country Link
CN (1) CN2702317Y (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101943712A (en) * 2009-07-02 2011-01-12 弗卢克公司 The resistance bridge architecture and method
WO2011137708A2 (en) * 2011-04-13 2011-11-10 华为技术有限公司 Resistance detection device and method thereof
CN102288831A (en) * 2011-05-16 2011-12-21 钟小梅 Low-cost high-accuracy resistance measuring system and measuring method thereof
CN102520383A (en) * 2012-01-12 2012-06-27 浙江省电力试验研究院 High-voltage high-resistance box with digitalized output
CN101937066B (en) * 2009-07-02 2013-01-23 臧佳菁 Self-calibrating method of internal reference resistors of multi-range digital electronic measuring instrument
CN104198819A (en) * 2014-08-28 2014-12-10 国家电网公司 Conductor resistance and resistivity measurement device
CN105467219A (en) * 2014-09-04 2016-04-06 盛微先进科技股份有限公司 Load impedance measuring system and method
CN108445292A (en) * 2018-06-04 2018-08-24 中车青岛四方机车车辆股份有限公司 Resistance measurement method based on error correction and device
WO2020253552A1 (en) * 2019-06-19 2020-12-24 中南大学 High-precision resistor measurement system and method based on combination of differential method and proportional method

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101943712A (en) * 2009-07-02 2011-01-12 弗卢克公司 The resistance bridge architecture and method
CN101937066B (en) * 2009-07-02 2013-01-23 臧佳菁 Self-calibrating method of internal reference resistors of multi-range digital electronic measuring instrument
WO2011137708A2 (en) * 2011-04-13 2011-11-10 华为技术有限公司 Resistance detection device and method thereof
CN102317798A (en) * 2011-04-13 2012-01-11 华为技术有限公司 Resistance detection device and method thereof
WO2011137708A3 (en) * 2011-04-13 2012-02-23 华为技术有限公司 Resistance detection device and method thereof
CN102317798B (en) * 2011-04-13 2013-06-26 华为技术有限公司 Resistance detection device and method thereof
CN102288831A (en) * 2011-05-16 2011-12-21 钟小梅 Low-cost high-accuracy resistance measuring system and measuring method thereof
CN102520383A (en) * 2012-01-12 2012-06-27 浙江省电力试验研究院 High-voltage high-resistance box with digitalized output
CN104198819A (en) * 2014-08-28 2014-12-10 国家电网公司 Conductor resistance and resistivity measurement device
CN105467219A (en) * 2014-09-04 2016-04-06 盛微先进科技股份有限公司 Load impedance measuring system and method
CN108445292A (en) * 2018-06-04 2018-08-24 中车青岛四方机车车辆股份有限公司 Resistance measurement method based on error correction and device
WO2020253552A1 (en) * 2019-06-19 2020-12-24 中南大学 High-precision resistor measurement system and method based on combination of differential method and proportional method

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