CN104374495A - R-T characteristics testing method of temperature transducer - Google Patents
R-T characteristics testing method of temperature transducer Download PDFInfo
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- CN104374495A CN104374495A CN201410736003.1A CN201410736003A CN104374495A CN 104374495 A CN104374495 A CN 104374495A CN 201410736003 A CN201410736003 A CN 201410736003A CN 104374495 A CN104374495 A CN 104374495A
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Abstract
The invention discloses an R-T characteristics testing method of a temperature transducer. The R-T characteristics testing method includes steps of (1) defining and connecting leads according to transducer pins, placing the temperature transducer into a thermostatic oil bath containing testing solvent with the head immerged in the testing solvent; (2) placing a thermometer into the testing solvent close to the temperature transducer, adjusting the temperature of the thermostatic oil bath, setting the appointed temperature, detecting the real-time temperature of the testing solvent in the thermostatic oil bath by the thermometer, measuring resistance of the temperature transducer by a multimeter, recording numerical value to compare with a standard numerical value and obtain a difference; (3) recovering the testing solvent after cooled, arranging instruments and sorting the original records. The R-T characteristics testing method is reasonable in design, can solve the problem that the thermostatic oil bath is non-uniform in temperature and generates error, testing steps are unified, testing accuracy is improved, and powerful insurance is provided for the testing accuracy.
Description
Technical field
The present invention relates to a kind of method of testing, particularly a kind of R-T characteristic test method of temperature sensor, belongs to field tests.
Background technology
Temperature sensor (temperature transducer) refers to can experience temperature and the sensor converting usable output signal to.Temperature sensor is the core of temperature measuring instrument, various in style.Contact and contactless two large classes can be divided into by metering system, be divided into thermal resistance and thermopair two class according to sensor material and electron component characteristic.Wherein thermopair, thermistor, platinum resistance (RTD) and temperature IC are temperature sensors the most frequently used in test.
The R-T characteristic test of temperature sensor is mainly tested according to the requirement in various test specification, general temperature sensor (thermistor-type) is along with the corresponding change of rising resistance value meeting of temperature, but this standard is the superclass of a test, special explanation and regulation are not had to concrete test method, the accuracy in detection of test method is not also ensured.Moreover the temperature heterogeneity of thermostatic oil bath, has deviation, has a strong impact on the accuracy of test.
Therefore, need to provide a kind of system comprehensive temperature sensor R-T characteristic test method, unified testing procedure, improves the accuracy of test.
Summary of the invention
In order to solve the defect existed in above-mentioned prior art, the object of the present invention is to provide a kind of R-T characteristic test method of temperature sensor, it can solve thermostatical oil grain non-uniform temperature, problem devious, unified testing procedure, improve the accuracy of test, for the accuracy of test provides strong guarantee.
To achieve these goals, the technical scheme that the present invention takes is:
A R-T characteristic test method for temperature sensor, this method of testing comprises the steps:
(1) connect wire according to sensor pin definition, be placed on by temperature sensor and fill in the thermostatic oil bath of test solvent, temperature sensor head immerses in test solvent;
(2) then thermometer is put into test solvent near temperature sensor location, regulating thermostatic oil sump temperature, setting assigned temperature, the real time temperature of test solvent in thermostatic oil bath is detected by thermometer, then the resistance in multimeter measuring tempeature sensor is used, record numerical value, compares difference with standard figures;
(3), after solvent cooling to be tested, reclaimed, arranged instrument, arranged raw readings.
As one of preferred version of the present invention, the length >=50cm of described wire.
As one of preferred version of the present invention, described test solvent is methyl-silicone oil.
As one of preferred version of the present invention, the degree of depth of the head immersion test solvent of described temperature sensor is 6 ± 1mm.
Preferred, the connector of described temperature sensor is not immersed in test solvent.
One of preferably, the described temperature of thermometer display and the difference of assigned temperature be not more than ± 0.2 DEG C.
Further, the time that described temperature sensor immerses in test solvent is not less than 3min, error≤± 0.2 DEG C, temperature compensation time >=10min.
Preferably, the R-T characteristic test method of described temperature sensor carries out in constant temperature oven.
Compared with prior art, beneficial effect of the present invention is:
The present invention is reasonable in design, and can solve thermostatical oil grain non-uniform temperature, problem devious, unified testing procedure, improves the accuracy of test, for the accuracy of test provides strong guarantee.
Accompanying drawing explanation
In order to be illustrated more clearly in the technology of the present invention main points, below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Fig. 1 is the schematic diagram of the R-T characteristic test method structure used of temperature sensor disclosed in this invention.
Description of reference numerals: 1-constant temperature oven, 2-thermostatic oil bath, 20-methyl-silicone oil, 3-platinum resistance, 4-wire, 5-thermometer, 6-multimeter.
Embodiment
Below in conjunction with the accompanying drawing in the present embodiment, carry out specifically, clearly and completely describing to the technical scheme in embodiment.
The invention provides a kind of R-T characteristic test method of temperature sensor, this method of testing is carried out in constant temperature oven, and it comprises the steps:
(1) wire is connected according to temperature sensor pinout, be convenient to test, length >=the 50cm of described wire, being placed on by temperature sensor fills in the thermostatic oil bath of test solvent, described test solvent is preferably methyl-silicone oil, temperature sensor head immerses in test solvent, and the degree of depth is 6 ± 1mm, and the connector of described temperature sensor is not immersed in test solvent;
Temperature sensor can be any one in thermopair, thermistor, platinum resistance (RTD) and temperature IC.
(2) then thermometer is put into test solvent near temperature sensor location, regulating thermostatic oil sump temperature, setting assigned temperature, the real time temperature of test solvent in thermostatic oil bath is detected by thermometer, the temperature of described thermometer display and the difference of assigned temperature be not more than ± and 0.2 DEG C, the time that described temperature sensor immerses in test solvent is not less than 3min, error≤± 0.2 DEG C, temperature compensation time >=10min, then the resistance in multimeter measuring tempeature sensor is used, record numerical value, compares difference with standard figures;
(3), after solvent cooling to be tested, reclaimed, arranged instrument, arranged raw readings.
As shown in Figure 1, be the method for testing of the present embodiment, thermostatic oil bath 2 be positioned in constant temperature oven 1, in constant temperature oven 1, test solvent is housed, test solvent is preferably methyl-silicone oil 20, and platinum resistance 3 is connected with multimeter 6 wire 4, be convenient to test, the length >=50cm of wire 4.Platinum resistance 3 head immerses in methyl-silicone oil 20, and the degree of depth is 6 ± 1mm, and the connector of described platinum resistance 3 is not immersed in methyl-silicone oil 20.
Then thermometer 5 is put into methyl-silicone oil 20, near platinum resistance 3 position, the temperature of regulating thermostatic oil groove 2, setting assigned temperature, the real time temperature of methyl-silicone oil 20 in thermostatic oil bath 2 is detected by thermometer 5, the difference of the temperature that described thermometer 5 shows and assigned temperature is not more than ± and 0.2 DEG C, the time that platinum resistance 3 immerses in methyl-silicone oil 20 is not less than 3min, error≤± 0.2 DEG C, temperature compensation time >=10min, then measure the resistance of platinum resistance 3 with multimeter 6, record numerical value, compares difference with the standard figures in table 1.
| Temperature (DEG C) | Resistance value (K Ω) | Margin tolerance % |
| -10 | 9.450 | ±13.6 |
| 20 | 2.500 | ±9.2 |
| 80 | 0.322 | ±9.9 |
Table 1
After methyl-silicone oil 20 cools, reclaimed, arranged instrument, arranged raw readings.
In sum, the present invention is reasonable in design, and can solve thermostatical oil grain non-uniform temperature, problem devious, unified testing procedure, improves the accuracy of test, for the accuracy of test provides strong guarantee.
Above-mentioned embodiment; be only and technical conceive of the present invention and architectural feature are described; object is to allow the stakeholder being familiar with technique implement according to this; but above said content does not limit the scope of the invention; every any equivalence done according to Spirit Essence of the present invention changes or modifies, and all should fall within protection scope of the present invention.
Claims (8)
1. a R-T characteristic test method for temperature sensor, is characterized in that, this method of testing comprises the steps:
(1) connect wire according to sensor pin definition, be placed on by temperature sensor and fill in the thermostatic oil bath of test solvent, temperature sensor head immerses in test solvent;
(2) then thermometer is put into test solvent near temperature sensor location, regulating thermostatic oil sump temperature, setting assigned temperature, the real time temperature of test solvent in thermostatic oil bath is detected by thermometer, then the resistance in multimeter measuring tempeature sensor is used, record numerical value, compares difference with standard figures;
(3), after solvent cooling to be tested, reclaimed, arranged instrument, arranged raw readings.
2. the R-T characteristic test method of temperature sensor according to claim 1, is characterized in that, the length >=50cm of described wire.
3. the R-T characteristic test method of temperature sensor according to claim 1 and 2, is characterized in that, described test solvent is methyl-silicone oil.
4. the R-T characteristic test method of temperature sensor according to claim 1 and 2, is characterized in that, the degree of depth of the head immersion test solvent of described temperature sensor is 6 ± 1mm.
5. the R-T characteristic test method of temperature sensor according to claim 4, is characterized in that, the connector of described temperature sensor is not immersed in test solvent.
6. the R-T characteristic test method of temperature sensor according to claim 1, is characterized in that, the temperature of described thermometer display and the difference of assigned temperature be not more than ± and 0.2 DEG C.
7. the R-T characteristic test method of temperature sensor according to claim 4, is characterized in that, the time that described temperature sensor immerses in test solvent is not less than 3min, error≤± 0.2 DEG C, temperature compensation time >=10min.
8. the R-T characteristic test method of temperature sensor according to claim 1, is characterized in that, the R-T characteristic test method of described temperature sensor carries out in constant temperature oven.
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| CN201410736003.1A CN104374495A (en) | 2014-12-04 | 2014-12-04 | R-T characteristics testing method of temperature transducer |
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| CN201410736003.1A CN104374495A (en) | 2014-12-04 | 2014-12-04 | R-T characteristics testing method of temperature transducer |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104807562A (en) * | 2015-05-08 | 2015-07-29 | 福州大学 | Labview-based temperature sensor chip testing system |
| CN105868439A (en) * | 2016-03-22 | 2016-08-17 | 深圳市赛尔美电子科技有限公司 | Resistance wire resistance value fitting method |
| CN107748021A (en) * | 2017-09-30 | 2018-03-02 | 中国计量大学 | A kind of temperature sensor dynamic testing method based on FPGA |
| CN107764435A (en) * | 2017-10-12 | 2018-03-06 | 中国计量大学 | A kind of dynamic characteristic test method of temperature switch |
| CN110926519A (en) * | 2019-12-26 | 2020-03-27 | 重庆卓开科技有限公司 | Sensor multi-party verification system and method |
| CN112924774A (en) * | 2021-01-21 | 2021-06-08 | 杭州永谐科技有限公司上海分公司 | Constant-temperature darkroom system for aging test |
| CN113917072A (en) * | 2021-10-11 | 2022-01-11 | 聚光科技(杭州)股份有限公司 | Detection method based on reaction process control |
| CN114488936A (en) * | 2022-01-26 | 2022-05-13 | 哈尔滨工程大学 | Performance verification platform of fire alarm system |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104807562A (en) * | 2015-05-08 | 2015-07-29 | 福州大学 | Labview-based temperature sensor chip testing system |
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| CN105868439A (en) * | 2016-03-22 | 2016-08-17 | 深圳市赛尔美电子科技有限公司 | Resistance wire resistance value fitting method |
| CN105868439B (en) * | 2016-03-22 | 2019-04-05 | 深圳市赛尔美电子科技有限公司 | A kind of resistance wire resistance value approximating method |
| CN107748021A (en) * | 2017-09-30 | 2018-03-02 | 中国计量大学 | A kind of temperature sensor dynamic testing method based on FPGA |
| CN107764435A (en) * | 2017-10-12 | 2018-03-06 | 中国计量大学 | A kind of dynamic characteristic test method of temperature switch |
| CN110926519A (en) * | 2019-12-26 | 2020-03-27 | 重庆卓开科技有限公司 | Sensor multi-party verification system and method |
| CN112924774A (en) * | 2021-01-21 | 2021-06-08 | 杭州永谐科技有限公司上海分公司 | Constant-temperature darkroom system for aging test |
| CN112924774B (en) * | 2021-01-21 | 2023-07-14 | 杭州永谐科技有限公司上海分公司 | Constant temperature darkroom system for aging test |
| CN113917072A (en) * | 2021-10-11 | 2022-01-11 | 聚光科技(杭州)股份有限公司 | Detection method based on reaction process control |
| CN114488936A (en) * | 2022-01-26 | 2022-05-13 | 哈尔滨工程大学 | Performance verification platform of fire alarm system |
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Application publication date: 20150225 |