CN211452669U - Multi-temperature-point multi-channel resistance acquisition system based on standard sample - Google Patents
Multi-temperature-point multi-channel resistance acquisition system based on standard sample Download PDFInfo
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- CN211452669U CN211452669U CN201922132654.0U CN201922132654U CN211452669U CN 211452669 U CN211452669 U CN 211452669U CN 201922132654 U CN201922132654 U CN 201922132654U CN 211452669 U CN211452669 U CN 211452669U
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Abstract
The utility model belongs to the technical field of sensor precision measurement, specifically provides a many temperature points multichannel resistance collection system based on standard sample, puts into a plurality of standard samples earlier, controls constant temperature medium controller output the constant temperature environment of each temperature point department that the temperature point is concentrated, gathers and stores all standard samples respectively corresponding respective standard resistance in same temperature point department; then binding the sample to be tested and the standard sample together and placing the bound sample and the standard sample into a constant temperature environment output by the constant temperature medium controller, and comparing the actually measured resistance value of each standard sample with the corresponding standard resistance value according to the set test temperature point; and when the actually measured temperature value is judged to be stable and accurate, starting to collect the resistance value of the sample to be measured and outputting the resistance-temperature relation curve of the sample to be measured. The sample to be tested is scanned in a short time, and the data is stored in an Excel table, so that the operation flow of personnel is saved. Whether the temperature is stable is judged by fixed logic, so that the test data can keep better consistency.
Description
Technical Field
The utility model belongs to the technical field of the sensor precision measurement, concretely relates to many temperature points multichannel resistance collection system based on trade sample.
Background
The R-T characteristic of the NTC sensor is used as a very important key characteristic parameter, the performance of the NTC sensor is directly reflected, the application range and the sensitivity of the sensor can be determined, and the result of the measurement must be carried out with high precision.
The old test mode before needs be according to the standard sample resistance, and manual regulation temperature point again waits to acquire the resistance and record on switching the table pen to the sample that awaits measuring after the people judges the temperature stable. Each temperature point and each single sample test is highly reproducible and unique. 1467 temperature points are tested in 2018 according to incomplete statistics, each temperature point is manually tested for about 30 minutes, a large amount of manpower is consumed every year, efficiency is low, and capacity optimization needs to be improved urgently.
Disclosure of Invention
The utility model aims at overcoming the problem that NTC sensor precision measurement is inefficient among the prior art.
Therefore, the utility model provides a multi-temperature point multi-channel resistance acquisition system based on a standard sample, which comprises a universal meter module, a constant temperature medium control module, a data acquisition module and an output module;
the universal meter is used for measuring the resistance values of the standard sample and the sample to be measured;
the constant temperature medium controller is used for controlling and stably outputting a specific constant temperature environment;
the data acquisition module is used for acquiring the resistance value of the standard sample and/or the sample to be detected in the constant temperature environment in real time;
and the output module is used for drawing the acquired actual temperature value and resistance value of the sample to be detected into an R-T curve and displaying the R-T curve under the condition of stable constant temperature environment.
Preferably, the multimeter module comprises a plurality of Keysight34461 multimeters, and each Keysight34461 multimeter is connected with a standard sample or a sample to be measured.
Preferably, the data acquisition module is used for setting temperature parameters of data to be acquired according to different temperature zone ranges and temperature intervals, and automatically acquiring corresponding resistance values at set temperature points.
Preferably, the data acquisition module comprises an STC12 single chip microcomputer and a crystal thermometer, the output end of the crystal thermometer is connected with the serial port of the STC12 single chip microcomputer, and the input end of the crystal thermometer is connected with the standard sample or the sample to be detected.
Preferably, the output module comprises a relay and a display, an output end of the relay is connected with a power supply end of the display, and an input end of the relay is connected with a serial port of the STC12 single chip microcomputer.
Preferably, the standard sample is an NTC temperature sensor with qualified precision.
Preferably, the thermostatic medium controller is a temperature and thermostatic control device based on a programmable control thermostatic bath.
Preferably, the temperature and constant temperature control device is an RTS-80 constant temperature bath.
The utility model has the advantages that: the utility model provides a many temperature points multichannel resistance collection system based on trade sample puts into a plurality of trade samples earlier, controls constant temperature medium controller output the constant temperature environment of each temperature point department that the temperature point is concentrated, gathers and stores all trade samples and respectively corresponds respective standard resistance in same temperature point department; then binding the sample to be tested and the standard sample together and placing the bound sample and the standard sample into a constant temperature environment output by the constant temperature medium controller, and comparing the actually measured resistance value of each standard sample with the corresponding standard resistance value according to the set test temperature point; and when the actually measured temperature value is judged to be stable and accurate, starting to collect the resistance value of the sample to be measured and outputting the resistance-temperature relation curve of the sample to be measured. The sample to be tested is scanned in a short time, and the data is stored in an Excel table, so that the operation flow of personnel is saved. Whether the temperature is stable is judged by fixed logic, so that the test data can keep better consistency.
The present invention will be described in further detail with reference to the accompanying drawings.
Drawings
Fig. 1 is the utility model discloses many temperature points multichannel resistance collection system's functional module sketch map based on trade sample.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of the present invention, "a plurality" means two or more unless otherwise specified.
The embodiment of the utility model provides a multi-temperature-point multi-channel resistance acquisition system based on a standard sample, which comprises a universal meter module, a constant temperature medium control module, a data acquisition module and an output module;
the universal meter is used for measuring the resistance values of the standard sample and the sample to be measured;
the constant temperature medium controller is used for controlling and stably outputting a specific constant temperature environment;
the data acquisition module is used for acquiring the resistance value of the standard sample and/or the sample to be detected in the constant temperature environment in real time;
and the output module is used for drawing the acquired actual temperature value and resistance value of the sample to be detected into an R-T curve and displaying the R-T curve under the condition of stable constant temperature environment.
As shown in fig. 1, the method generally includes two processes, first, obtaining a table of temperature-resistance curves of a standard sample: firstly, a plurality of standard samples are put into a closed system, two standard samples are generally selected, the standard samples are standard NTC temperature sensors which are normal in test and have higher manufacturing precision, a constant temperature environment is manufactured by setting a temperature sequence through a constant temperature medium controller, then the corresponding resistance of the standard NTC temperature sensors is tested through a universal meter at each temperature point, and real-time temperature and universal meter resistance are acquired through a data acquisition module. Wherein the temperature acquisition can be performed by a temperature sensor, such as a crystal thermometer. And finally obtaining resistance values corresponding to different temperature points to form a standard sample table for outputting. Then, the second step is to measure the temperature-resistance curve of the sample to be measured when the temperature is stable and accurate according to the reference comparison: binding a sample to be tested and a standard sample together, putting the sample and the standard sample into a constant temperature environment, setting a temperature value to be tested, reading a corresponding standard resistance value of each standard sample at the temperature point by searching a standard sample table, measuring the resistance value of each standard sample in real time, comparing and analyzing the actually measured resistance value and the standard resistance value, and if the actually measured resistance value is in the fluctuation range of a curve table, indicating that the regulation and control temperature at the moment tends to be stable. And then further determining whether the temperature value is an accurate temperature value to be tested, detecting the current actual temperature in real time through a temperature sensor, comparing the actual temperature value with a set temperature value, and if the temperature is accurate or the fluctuation range is in a reasonable range. At the moment, the sampling time is mature, sample data are obtained through a high-speed data acquisition module, the sample data comprise a resistance-temperature relation curve of the standard sample, finally, the result of the branch pipe is output after calculation through a certain proportion conversion logic, and all data recording results are automatically stored in an Excel table.
Preferably, the multimeter module comprises a plurality of Keysight34461 multimeters, and each Keysight34461 multimeter is connected with a standard sample or a sample to be measured. By setting a Keysight34461 universal meter, the data acquisition mode is that the resistance value of a standard sample and the resistance value of a strip sample are alternately acquired, and then the result data is output after the logical calculation is converted according to the median equal proportion.
According to the preferable scheme, the data acquisition module is used for setting temperature parameters needing to acquire data according to different temperature zone ranges and temperature intervals, and automatically acquiring corresponding resistance values at set temperature points. Setting temperature parameters and the number of standard samples, automatically setting the temperature after a temperature point is set by a constant temperature control system, slightly adjusting positive and negative deviations according to actual conditions, waiting for the temperature to be stable, finding the time for starting to collect data by a high-speed collection system, alternately scanning the sample to be detected and the standard sample in a short time, obtaining the data of the sample to be detected and the standard sample, then converting logic according to a median column to output a final result, and automatically storing all data records in an Excel table.
Preferably, the data acquisition module comprises an STC12 single chip microcomputer and a crystal thermometer, the output end of the crystal thermometer is connected with the serial port of the STC12 single chip microcomputer, and the input end of the crystal thermometer is connected with the standard sample or the sample to be detected. The output module comprises a relay and a display, the output end of the relay is connected with the power supply end of the display, and the input end of the relay is connected with the serial port of the STC12 single chip microcomputer. A Relay control circuit, namely a Relay circuit, is built based on an STC12 single chip microcomputer, 16 relays, namely a threshold value input/output control switch, every two relays are a group, positive and negative two meter pens of the multimeter are respectively connected, 8 groups are formed in total, the contact closing impedance of each group of relays is less than 2 omega, the response time is less than 10ms, the wireless communication speed is 9600bps, the platform is powered by AC220V, different required voltages are automatically converted by the inside, the Relay control circuit has a power-on self-resetting function, a sample resistance interface is designed into a 2pin plastic seat, and plugging and unplugging are facilitated. When the single chip microcomputer judges that the temperature of the system is stable, the display is started through Relay so as to output corresponding temperature and resistance, otherwise, the corresponding temperature and resistance are not output.
In a preferred scheme, the standard sample is an NTC temperature sensor with qualified precision. Therefore, before the NTC temperature sensor is used, the NTC temperature sensor with two qualified precision standards is detected by the existing complex and higher-precision instrument and is used as a standard sample of the technical scheme.
In a preferred embodiment, the thermostatic medium controller is a thermostatic temperature control device based on a programmable thermostatic bath. The method comprises the steps of placing a sample to be measured, namely a standard sample, in a constant temperature medium of a programmable control constant temperature bath, automatically regulating and controlling the temperature to reach a desired temperature condition through a temperature constant temperature control device, manufacturing a proper and accurate standard sample based on actual temperature detection and evaluation of a crystal thermometer, judging the standard sample to be in a stable and accurate temperature environment through a high-speed acquisition data acquisition module, and starting to test a temperature point data set to generate an R-T curve. Similarly, after the resistance value of one temperature point is measured, the steps are repeated to start the measurement of the next temperature point, and finally the resistance values of all the temperature points are connected to form an R-T curve, namely a resistance-temperature relation curve.
Preferably, the temperature and constant temperature control equipment is RTS-80 constant temperature bath. By simplifying the process of capturing temperature points during resistance testing of the NTC sensor, the system can automatically regulate and control the temperature of the RTS-80 thermostatic bath according to requirements, can slightly regulate positive and negative deviations according to conditions, and can realize multi-channel element and multi-temperature point testing by combining a peripheral I/O circuit, so that about five ten thousandths of average testing precision can be realized. The method replaces manual long waiting for measurement, reduces various errors caused by manual judgment, and improves data reliability. When the temperature is stable, the sample to be tested is scanned in a short time, the data is stored in an Excel table, the temperature point is captured more accurately, the test data keeps better consistency, the data scanning time is recorded in a very short time, and the consistency timeliness and the data accuracy of the data among the samples are ensured.
In the preferable scheme, the standard sample is an NTC temperature sensor qualified by test and inspection, and a plurality of standard samples have the same model and different packaging forms. In the selection of the standard sample, generally two or more NTC temperature sensors which are detected to be accurate are selected as the standard sample, the two NTC temperature sensors have the same parameters, but different packaging forms, namely different time constants, and the resistance values of the two NTC temperature sensors are acquired by simultaneously placing the two NTC temperature sensors in a constant temperature environment output by a constant temperature medium controller to form respective resistance value reference tables. And then, selecting temperature test points for the sample to be tested, judging, and when the resistance values of the two standard samples are respectively detected to fluctuate in a small range of the corresponding nearby standard values, considering that the current temperature is stabilized at the required temperature point, and determining the mature time of data acquisition. Or selecting more NTC temperature sensors, and then measuring the resistance value to obtain the median value.
The specific working principle of the system comprises two processes, specifically as follows:
the first process is as follows: and (5) establishing a standard table. The method comprises the steps of putting two standard NTC sensors, namely standard samples, into a test system, calculating temperature points to be tested according to a temperature range and interval temperature, manufacturing a stable constant temperature environment by constant temperature medium control equipment according to a set temperature sequence, measuring resistance values of the standard samples at each temperature point, correspondingly manufacturing the respective temperature-resistance values into a standard sample temperature-resistance value curve table, and storing the standard sample temperature-resistance value curve table as a reference standard in subsequent actual measurement.
The second process: and starting actual measurement. Putting a sample to be tested and a standard sample into a constant temperature environment, setting a parameter value of a temperature point to be tested, inquiring a standard sample temperature-resistance curve table according to a temperature value to obtain the resistance value of the standard sample at the moment, judging and regulating whether a current temperature set value is stable or not, namely monitoring the actual temperature value of the standard sample at the temperature in real time, and seeing whether temperature measured values of all the standard samples fluctuate within a set acceptable precision range or not, if so, indicating that the temperature is stable, otherwise, indicating that the temperature is unstable, and continuing to measure the resistance value until the temperature. After the temperature is stable, whether the current temperature is accurate or not is judged according to the resistance values of the two standard samples, namely, the resistance values of the standard samples are reversely obtained through a current stable temperature value table, two continuous 10 resistance value data of the two standard samples are respectively taken to respectively form two arrays, if the variance of the two arrays meets the fluctuation within 0.005% of the average value, the temperature at the moment is judged to be in an accurate state, the sampling time is mature, and then the temperature and the resistance values at the moment are collected through a data collection module and output.
Specifically, during sampling, the temperature value of the standard sample is read once every 1.5 seconds, 15 groups of data are continuously read to form a row of array, the average value and variance of the array are calculated, and if the variance of all the standard samples is less than 0.005% of the average value, the temperature is considered to be stable. Therefore, the first process is to obtain the standard resistance value table corresponding to the temperatures of the double standard samples, which includes calculating the temperature points to be tested according to the temperature range and the interval temperature, and the thermostatic medium control device produces the stable thermostatic environment according to the set temperature sequence. The stable constant temperature environment is automatically regulated and controlled by a system program, the temperature accuracy is directly read by a crystal thermometer calibrated by an instrument checking center, temperature data is transmitted to a test system, the test system reads the temperature value of each standard sample once every 1.5 seconds, 15 groups of data are continuously read to form a row of array, the average value and the variance of the array are calculated, if the variance is less than 0.005 percent of the average value, the temperature values of all the standard samples can be collected, and the median value is taken as the temperature actual measurement value at the moment.
In the preferred scheme, two continuous 10 resistance data of the two standard samples are respectively taken to respectively form two arrays, and if the variance of the two arrays meets the fluctuation within 0.005% of the average value at the same time, the temperature at the moment is judged to be in an accurate state, so that the sampling time is mature. Therefore, the second process is to determine the data acquisition time of the sample to be detected according to the resistance value of the standard sample, so that the data acquisition system continuously acquires the resistance value of the standard sample once every 1.6 seconds, respectively take 10 continuous data of the two standard samples to respectively form two arrays, if the variance of the two arrays simultaneously meets 0.005% fluctuation of the average value, the time is considered to be mature, immediately and alternately acquire the resistance values of the standard sample and the sample to be detected, and output the result and store the result in the table through a proportional operation algorithm.
The utility model has the advantages that: the utility model provides a many temperature points multichannel resistance collection system based on trade sample puts into the trade sample earlier, utilizes constant temperature medium controller output the constant temperature environment of each temperature point department that the temperature point is concentrated, gathers and saves the corresponding resistance of each temperature point so as to form the trade sample temperature-resistance curve table; then monitoring the resistance value of the standard sample in real time according to the set test temperature point, and comparing the fluctuation condition of the measured resistance value with the standard sample temperature-resistance value curve table; and when the actually measured temperature value is judged to be stable and accurate, starting to collect the resistance value of the sample to be measured and outputting the resistance-temperature relation curve of the standard sample. The positive and negative deviations can be slightly adjusted according to the conditions, the temperature is kept stable, the sample to be detected is scanned in a short time, the data is stored in an Excel table, and the personnel operation flow is saved. Whether the temperature is stable is judged by fixed logic, accidental errors of manual judgment are reduced, test data are kept in good consistency, automatic regulation and control can be achieved, multi-channel simultaneous measurement can be achieved, test efficiency is improved, manual operation is not needed in the test process, accidental errors caused by operation of personnel are reduced, and human resources are saved. The response speed is automatically controlled by a program to be higher, the test precision is improved, and in addition, output data are output in a report form, so that the post-processing is convenient.
The above illustration is merely an illustration of the present invention, and does not limit the scope of the present invention, and all designs identical or similar to the present invention are within the scope of the present invention.
Claims (8)
1. The utility model provides a many temperature points multichannel resistance collection system based on trade sample which characterized in that: the device comprises a universal meter module, a constant temperature medium control module, a data acquisition module and an output module;
the universal meter is used for measuring the resistance values of the standard sample and the sample to be measured;
the constant temperature medium controller is used for controlling a stable output constant temperature environment;
the data acquisition module is used for acquiring the resistance value of the standard sample and/or the sample to be detected in the constant temperature environment in real time;
and the output module is used for drawing the acquired actual temperature value and resistance value of the sample to be detected into an R-T curve and displaying the R-T curve under the condition of stable constant temperature environment.
2. The standards-based multi-temperature-point multi-channel resistance acquisition system of claim 1, wherein: the universal meter module comprises a plurality of Keysight34461 universal meters, and each Keysight34461 universal meter is connected with a standard sample or a sample to be tested.
3. The standards-based multi-temperature-point multi-channel resistance acquisition system of claim 1, wherein: the data acquisition module is used for setting temperature parameters needing to acquire data according to different temperature zone ranges and temperature intervals, and automatically acquiring corresponding resistance values at set temperature points.
4. The standards-based multi-temperature-point multi-channel resistance acquisition system of claim 1, wherein: the data acquisition module comprises an STC12 single chip microcomputer and a crystal thermometer, the output end of the crystal thermometer is connected with the serial port of the STC12 single chip microcomputer, and the input end of the crystal thermometer is connected with the standard sample or the sample to be detected.
5. The standards-based multi-temperature-point multi-channel resistance acquisition system according to claim 4, wherein: the output module comprises a relay and a display, the output end of the relay is connected with the power supply end of the display, and the input end of the relay is connected with the serial port of the STC12 single chip microcomputer.
6. The standards-based multi-temperature-point multi-channel resistance acquisition system of claim 1, wherein: the standard sample is an NTC temperature sensor with qualified precision.
7. The standards-based multi-temperature-point multi-channel resistance acquisition system of claim 1, wherein: the thermostatic medium controller is a temperature thermostatic control device based on a programmable control thermostatic bath.
8. The standards-based multi-temperature-point multi-channel resistance acquisition system of claim 7, wherein: the temperature constant temperature control equipment is RTS-80 constant temperature bath.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113324679A (en) * | 2021-05-31 | 2021-08-31 | 新疆维吾尔自治区计量测试研究院 | Thermal resistance time constant measuring method and device |
| CN113483918A (en) * | 2021-05-26 | 2021-10-08 | 孝感华工高理电子有限公司 | Method and system for testing temperature response rate of NTC (negative temperature coefficient) automobile temperature sensor |
| CN113567010A (en) * | 2021-08-17 | 2021-10-29 | 安徽江淮汽车集团股份有限公司 | Engine temperature sensor test system and test method |
| CN113588132A (en) * | 2021-07-27 | 2021-11-02 | 吉林省中赢高科技有限公司 | Temperature processing method and device |
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2019
- 2019-11-29 CN CN201922132654.0U patent/CN211452669U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113483918A (en) * | 2021-05-26 | 2021-10-08 | 孝感华工高理电子有限公司 | Method and system for testing temperature response rate of NTC (negative temperature coefficient) automobile temperature sensor |
| CN113483918B (en) * | 2021-05-26 | 2023-06-23 | 孝感华工高理电子有限公司 | Method and system for testing response speed of NTC (negative temperature coefficient) automobile temperature sensor to temperature |
| CN113324679A (en) * | 2021-05-31 | 2021-08-31 | 新疆维吾尔自治区计量测试研究院 | Thermal resistance time constant measuring method and device |
| CN113588132A (en) * | 2021-07-27 | 2021-11-02 | 吉林省中赢高科技有限公司 | Temperature processing method and device |
| CN113588132B (en) * | 2021-07-27 | 2023-08-08 | 吉林省中赢高科技有限公司 | Temperature processing method and device |
| CN113567010A (en) * | 2021-08-17 | 2021-10-29 | 安徽江淮汽车集团股份有限公司 | Engine temperature sensor test system and test method |
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