CN202189096U - Device for automatically testing resistance of platinum resistor high precisely - Google Patents
Device for automatically testing resistance of platinum resistor high precisely Download PDFInfo
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- CN202189096U CN202189096U CN2011203257245U CN201120325724U CN202189096U CN 202189096 U CN202189096 U CN 202189096U CN 2011203257245 U CN2011203257245 U CN 2011203257245U CN 201120325724 U CN201120325724 U CN 201120325724U CN 202189096 U CN202189096 U CN 202189096U
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- resistance
- platinum resistor
- measuring
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Abstract
The utility model relates to a device for automatically testing the resistance of a platinum resistor high precisely, belonging to the device for automatically testing the resistance of a platinum resistor and aiming to solve the problem of low measuring precision of the prior method for measuring the resistance of the platinum resistor. A platinum resistor under test is connected in parallel with a clamping tool; a measuring unit is used for providing a current signal and measuring the voltage on two ends of the platinum resistor; and after the measurement result is inputted into a computer, the computer sends a command to control a logic switching control circuit to logically switch a switch matrix so as to realize the positive and negative current measurement. In the utility model, the lead resistance and other superimposed resistance are eliminated by using a four-wire measurement method, the positive and negative current measurement is realized by using a matrix switch circuit to switch rapidly, and the measuring precision which is superior to 0.01% of the resistance of the platinum resistor is realized by programming a computer software to process the measurement result. The device disclosed by the utility model is suitable for measuring the resistance of a common resistor high precisely.
Description
Technical field
The utility model relates to a kind of RTD resistance automatic testing equipment.
Background technology
In the existing RTD resistance measuring process, lead resistance and thermopower can be brought extra error to measurement, and these errors are bigger for the resistance measurement influence of RTD high-precision measurement, especially PT100, and measuring accuracy is low.
The utility model content
The utility model is the low problem of measuring accuracy that has test RTD resistance method now in order to solve, thereby a kind of high-precision platinum resistor resistance automatic testing equipment is provided.
A kind of high-precision platinum resistor resistance automatic testing equipment; It comprises anchor clamps, switch matrix, measuring unit, computing machine and logic control switching circuit; Said RTD to be measured is parallelly connected with anchor clamps; The two-way current signal output end of said anchor clamps is connected with the two-way current signal input end of switch matrix; The two-way voltage signal output end of said anchor clamps is connected with the two-way voltage signal input end of switch matrix; The current signal output end of said switch matrix is connected with the current signal input end of measuring unit; The voltage signal output end of switch matrix is connected with the voltage signal input end of measuring unit; The current measurement control signal output ends of measuring unit is connected with the current measurement signal input end of switch matrix, and the voltage measurement control signal output ends of measuring unit is connected with the voltage measurement signal input end of switch matrix, and the measuring-signal output of measuring unit or input end input or output end with the measuring-signal of computing machine and be connected; The logic switch-over control signal output terminal of said computing machine is connected with the logic switch-over control signal input end of logic control switching circuit, and the logic switch-over control signal output terminal of said logic control switching circuit is connected with the logic switch-over control signal input end of switch matrix.
Beneficial effect: the method that the utility model is measured through four-wire system is eliminated in lead resistance and the system other stack resistance; And switch fast through switch matrix circuit and to realize the forward and reverse measurement of electric current; Through the establishment computer software measurement result is handled, realized being superior to the resistance measuring accuracy of 0.01% RTD.
Description of drawings
Fig. 1 is the structural representation of the utility model, and Fig. 2 is the circuit catenation principle synoptic diagram of the utility model.
Embodiment
Embodiment one, combination Fig. 1 and Fig. 2 explain this embodiment; A kind of high-precision platinum resistor resistance automatic testing equipment; It comprises anchor clamps 1, switch matrix 2, measuring unit 3, computing machine 4 and logic control switching circuit 5; Said RTD to be measured is parallelly connected with anchor clamps 1; The two-way current signal output end of said anchor clamps 1 is connected with the two-way current signal input end of switch matrix 2; The two-way voltage signal output end of said anchor clamps 1 is connected with the two-way voltage signal input end of switch matrix 2; The current signal output end of said switch matrix 2 is connected with the current signal input end of measuring unit 3, and the voltage signal output end of switch matrix 2 is connected with the voltage signal input end of measuring unit 3, and the current measurement control signal output ends of measuring unit 3 is connected with the current measurement signal input end of switch matrix 2; The voltage measurement control signal output ends of measuring unit 3 is connected with the voltage measurement signal input end of switch matrix 2; The measuring-signal output of measuring unit 3 or input end input or output end with the measuring-signal of computing machine 4 and are connected, and the logic switch-over control signal output terminal of said computing machine 4 is connected with the logic switch-over control signal input end of logic control switching circuit 5, and the logic switch-over control signal output terminal of said logic control switching circuit 5 is connected with the logic switch-over control signal input end of switch matrix 2.
In this embodiment; The method of measuring through four-wire system is eliminated in lead resistance and the system other stack resistance; And switch fast through switch matrix circuit and to realize the forward and reverse measurement of electric current; Combine the signal filtering algorithm of software to eliminate the electromotive force error through opposite polarity measurement electric current, realize being superior to the resistance measuring accuracy of 0.01% RTD.Simultaneously, this embodiment is furnished with the good man-machine interaction interface, is convenient to operation.Proving installation in this embodiment has enough fast switching and measurement response speed, is superior to the thermal time constant of circuit under test, and assurance circuit under test temperature causes to accomplish before thermopower changes to be measured.The utility model can be applicable to scientific research, produce in the measurement, calibration etc. of RTD, but also expanded application in the measurement of precision resister.
The difference of embodiment two, this embodiment and embodiment one described a kind of high-precision platinum resistor resistance automatic testing equipment is that it also comprises thermostat 6, and RTD to be measured is positioned in the thermostat 6.
In this embodiment, thermostat 6 is used to keep RTD to be measured to be in temperature constant state.
The difference of embodiment three, this embodiment and embodiment one or two described a kind of high-precision platinum resistor resistance automatic testing equipments is; The quantity of RTD to be measured is N; The quantity of anchor clamps 1 is N; Said each RTD to be measured is all parallelly connected with anchor clamps 1, and said N is the integer more than or equal to 1.
This embodiment can be as required, and the one or more RTDs of one-shot measurement have the advantage that measuring speed is fast, stable, antijamming capability is strong.
Claims (3)
1. high-precision platinum resistor resistance automatic testing equipment; It is characterized in that: it comprises anchor clamps (1), switch matrix (2), measuring unit (3), computing machine (4) and logic control switching circuit (5); Said RTD to be measured is parallelly connected with anchor clamps (1); The two-way current signal output end of said anchor clamps (1) is connected with the two-way current signal input end of switch matrix (2); The two-way voltage signal output end of said anchor clamps (1) is connected with the two-way voltage signal input end of switch matrix (2); The current signal output end of said switch matrix (2) is connected with the current signal input end of measuring unit (3); The voltage signal output end of switch matrix (2) is connected with the voltage signal input end of measuring unit (3); The current measurement control signal output ends of measuring unit (3) is connected with the current measurement signal input end of switch matrix (2); The voltage measurement control signal output ends of measuring unit (3) is connected with the voltage measurement signal input end of switch matrix (2); The measuring-signal output of measuring unit (3) or input end input or output end with the measuring-signal of computing machine (4) and are connected, and the logic switch-over control signal output terminal of said computing machine (4) is connected with the logic switch-over control signal input end of logic control switching circuit (5), and the logic switch-over control signal output terminal of said logic control switching circuit (5) is connected with the logic switch-over control signal input end of switch matrix (2).
2. a kind of high-precision platinum resistor resistance automatic testing equipment according to claim 1 is characterized in that it also comprises thermostat (6), and RTD to be measured is positioned in the thermostat (6).
3. a kind of high-precision platinum resistor resistance automatic testing equipment according to claim 1 and 2; The quantity that it is characterized in that RTD to be measured is N; The quantity of anchor clamps (1) is N, and said each RTD to be measured is all parallelly connected with anchor clamps (1), and said N is the integer more than or equal to 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203257245U CN202189096U (en) | 2011-09-01 | 2011-09-01 | Device for automatically testing resistance of platinum resistor high precisely |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203257245U CN202189096U (en) | 2011-09-01 | 2011-09-01 | Device for automatically testing resistance of platinum resistor high precisely |
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| Publication Number | Publication Date |
|---|---|
| CN202189096U true CN202189096U (en) | 2012-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011203257245U Expired - Fee Related CN202189096U (en) | 2011-09-01 | 2011-09-01 | Device for automatically testing resistance of platinum resistor high precisely |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675470A (en) * | 2013-11-11 | 2014-03-26 | 北京控制工程研究所 | N*M dimension resistor network measuring device |
| CN107917739A (en) * | 2017-11-10 | 2018-04-17 | 辽宁红沿河核电有限公司 | Full power primary Ioops coolant flow measurement complexes |
| CN109283395A (en) * | 2018-11-30 | 2019-01-29 | 中国科学院上海微系统与信息技术研究所 | A kind of multichannel resistance test system and its test method |
| CN112798864A (en) * | 2020-12-31 | 2021-05-14 | 徐州淮远电子科技有限公司 | Automatic testing device and sorting device for equivalent impedance of MOSFET (metal-oxide-semiconductor field effect transistor) |
| CN113533949A (en) * | 2021-05-28 | 2021-10-22 | 中电科思仪科技股份有限公司 | Large-scale switch matrix rapid detection device and method |
| CN117607546A (en) * | 2024-01-24 | 2024-02-27 | 合肥巨阙电子有限公司 | Multi-channel high-speed high-resistance measurement system and measurement method |
-
2011
- 2011-09-01 CN CN2011203257245U patent/CN202189096U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675470A (en) * | 2013-11-11 | 2014-03-26 | 北京控制工程研究所 | N*M dimension resistor network measuring device |
| CN103675470B (en) * | 2013-11-11 | 2016-02-10 | 北京控制工程研究所 | A kind of N*M dimension resistor network measurement mechanism |
| CN107917739A (en) * | 2017-11-10 | 2018-04-17 | 辽宁红沿河核电有限公司 | Full power primary Ioops coolant flow measurement complexes |
| CN109283395A (en) * | 2018-11-30 | 2019-01-29 | 中国科学院上海微系统与信息技术研究所 | A kind of multichannel resistance test system and its test method |
| CN112798864A (en) * | 2020-12-31 | 2021-05-14 | 徐州淮远电子科技有限公司 | Automatic testing device and sorting device for equivalent impedance of MOSFET (metal-oxide-semiconductor field effect transistor) |
| CN112798864B (en) * | 2020-12-31 | 2022-03-15 | 徐州淮远电子科技有限公司 | Automatic testing device and sorting device for equivalent impedance of MOSFET (metal-oxide-semiconductor field effect transistor) |
| CN113533949A (en) * | 2021-05-28 | 2021-10-22 | 中电科思仪科技股份有限公司 | Large-scale switch matrix rapid detection device and method |
| CN117607546A (en) * | 2024-01-24 | 2024-02-27 | 合肥巨阙电子有限公司 | Multi-channel high-speed high-resistance measurement system and measurement method |
| CN117607546B (en) * | 2024-01-24 | 2024-04-16 | 合肥巨阙电子有限公司 | Multi-channel high-speed high-resistance measurement system and measurement method |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120411 Termination date: 20170901 |