CN-224231858-U - Nonlinear resistance tester with temperature and humidity detection function

Abstract

The application discloses a nonlinear resistance tester with a temperature and humidity detection function, which relates to the technical field of resistance testing, and comprises a temperature and humidity detection module, an acquisition switch, an upper computer and a resistance testing module, wherein the temperature and humidity detection module comprises a comparison unit, a temperature gear selection unit, a humidity gear selection unit, a temperature detection unit, a humidity detection unit and a trigger unit which are connected with the comparison unit; the trigger unit is also connected with the acquisition switch, the acquisition switch is respectively connected with the upper computer, the resistor to be tested and the resistor testing module, and the resistor testing module is also connected with the resistor to be tested. According to the application, the temperature and humidity detection module is integrated, so that the nonlinear resistance tester can monitor the environmental temperature and humidity change during testing, the influence of the temperature and humidity change on the resistance characteristic measurement is avoided, and the accuracy and reliability of the testing result are improved.

Inventors

• He Shuangbin
• HE CHANGPING

Assignees

• 四川省万变电气技术有限公司

Dates

Publication Date

20260512

Application Date

20250410

Claims (9)

1. 1. A nonlinear resistance tester with a temperature and humidity detection function is characterized by comprising a temperature and humidity detection module, an acquisition switch, an upper computer and a resistance test module, wherein, The temperature and humidity detection module comprises a comparison unit, a temperature gear selection unit, a humidity gear selection unit, a temperature detection unit, a humidity detection unit and a trigger unit, wherein the temperature gear selection unit, the humidity gear selection unit, the temperature detection unit, the humidity detection unit and the trigger unit are connected with the comparison unit; The trigger unit is also connected with the acquisition switch, the acquisition switch is respectively connected with the upper computer, the resistor to be tested and the resistor testing module, and the resistor testing module is also connected with the resistor to be tested.
2. 2. The nonlinear resistance tester with the temperature and humidity detection function according to claim 1, wherein the comparison unit comprises a temperature comparison unit and a humidity comparison unit, both of which are connected with the trigger unit, wherein, The temperature comparison unit is also respectively connected with the temperature detection unit and the temperature gear selection unit; The humidity comparison unit is also respectively connected with the humidity detection unit and the humidity gear selection unit.
3. 3. The nonlinear resistance tester with the temperature and humidity detection function according to claim 2, wherein the temperature gear selection unit comprises a temperature range selection component, an upper temperature limit adjustment component and a lower temperature limit adjustment component, the humidity gear selection unit comprises a humidity range selection component, an upper humidity limit adjustment component and a lower humidity limit adjustment component, wherein, The temperature range selection assembly is respectively connected with the upper temperature limit adjustment assembly and the lower temperature limit adjustment assembly, and the upper temperature limit adjustment assembly and the lower temperature limit adjustment assembly are also connected with the temperature comparison unit; The humidity range selection assembly is respectively connected with the humidity upper limit adjustment assembly and the humidity lower limit adjustment assembly, and the humidity upper limit adjustment assembly and the humidity lower limit adjustment assembly are also connected with the humidity comparison unit.
4. 4. The nonlinear resistance tester with temperature and humidity detection function according to claim 3, wherein the temperature comparison unit comprises an upper temperature limit comparator, a lower temperature limit comparator, a first diode, a second diode, a first resistor, a second resistor and a first voltage stabilizing tube, The first input end of the temperature upper limit comparator is connected with the temperature upper limit adjusting component, the second input end of the temperature upper limit comparator is connected with the temperature detecting unit, the output end of the temperature upper limit comparator is connected with the anode of the first diode, the cathode of the first diode is connected with one end of the first resistor, the other end of the first resistor is respectively connected with one end of the second resistor, the cathode of the first voltage stabilizing tube and the triggering unit, and the other end of the second resistor is grounded with the anode of the first voltage stabilizing tube; The first input end of the temperature lower limit comparator is connected with the temperature lower limit adjusting component, the second input end of the temperature lower limit comparator is connected with the temperature detecting unit, the output end of the temperature lower limit comparator is connected with the anode of the second diode, and the cathode of the second diode is connected with one end of the first resistor.
5. 5. The nonlinear resistance tester with temperature and humidity detection function according to claim 4, wherein the humidity comparison unit comprises an upper humidity limit comparator, a lower humidity limit comparator, a third diode, a fourth diode, a third resistor, a fourth resistor and a second voltage stabilizing tube, wherein, The first input end of the humidity upper limit comparator is connected with the humidity upper limit adjusting component, the second input end of the humidity upper limit comparator is connected with the humidity detecting unit, the output end of the humidity upper limit comparator is connected with the anode of the third diode, the cathode of the third diode is connected with one end of the third resistor, the other end of the third resistor is respectively connected with one end of the fourth resistor, the cathode of the second voltage stabilizing tube and the triggering unit, and the other end of the fourth resistor is grounded with the anode of the second voltage stabilizing tube; The first input end of the humidity lower limit comparator is connected with the humidity lower limit adjusting component, the second input end of the humidity lower limit comparator is connected with the humidity detecting unit, the output end of the humidity lower limit comparator is connected with the anode of the fourth diode, and the cathode of the fourth diode is connected with one end of the first resistor.
6. 6. The nonlinear resistance tester with the temperature and humidity detection function according to claim 5, wherein the trigger unit comprises an exclusive or gate logic component, wherein, The first input port of the exclusive-or gate logic component is connected with the cathode of the first voltage stabilizing tube, the second input port of the exclusive-or gate logic component is connected with the cathode of the second voltage stabilizing tube, and the output end of the exclusive-or gate logic component is connected with the acquisition switch.
7. 7. The nonlinear resistance tester with the temperature and humidity detection function according to claim 6, wherein the acquisition switch comprises a voltage sampling control switch and a current sampling control switch, wherein, The control end of the voltage sampling control switch is connected with the trigger unit, the input end of the voltage sampling control switch is connected with the resistor to be tested through a voltage sampling module, and the output end of the voltage sampling control switch is connected with the upper computer; The control end of the current sampling control switch is connected with the trigger unit, the input end of the current sampling control switch is connected with the resistor to be tested through the current sampling module, and the output end of the current sampling control switch is connected with the upper computer.
8. 8. The nonlinear resistance tester with the temperature and humidity detection function according to claim 7, wherein the voltage sampling control switch comprises a first switch tube, the current sampling control switch comprises a second switch tube, a control end of the first switch tube is connected with an output end of the exclusive-or gate logic component, an input end of the first switch tube is connected with the resistor to be detected through a voltage sampling module, and an output end of the first switch tube is connected with the upper computer; The control end of the second switching tube is connected with the output end of the exclusive-or gate logic component, the input end of the second switching tube is connected with the resistor to be tested through the current sampling module, and the output end of the second switching tube is connected with the upper computer.
9. 9. The nonlinear resistance tester with temperature and humidity detection function as claimed in any one of claims 1-8, wherein the resistor to be tested is a varistor.

Description

Nonlinear resistance tester with temperature and humidity detection function Technical Field The application relates to the technical field of resistance testing, in particular to a nonlinear resistance tester with a temperature and humidity detection function. Background A nonlinear resistance tester is a device that is specially used to evaluate the resistance value change characteristics of a nonlinear resistive element under voltage or current changes. The nonlinear resistor performance is analyzed and judged by applying different voltage or current signals and measuring corresponding resistance values in real time. In the resistance test process, related test devices such as a nonlinear resistance tester play a key role and are used for accurately capturing and evaluating the nonlinear characteristics of the resistance element. Conventional non-linear resistance testers have only a single electrical quantity test. In practice, the temperature and the humidity have great influence on the electrical parameters of the nonlinear resistor, such as silicon carbide (SiC) and zinc oxide (ZnO) which are widely applied, and the nonlinear resistor has negative humidity coefficient characteristics, that is, in a certain humidity range, the resistance value is reduced along with the rise of the humidity, so that the change of the temperature and the humidity of the surrounding environment needs to be considered to ensure the accuracy of the test result when the nonlinear resistor test is performed. Disclosure of utility model The application mainly aims to provide a nonlinear resistance tester with a temperature and humidity detection function, and aims to solve the technical problem that the accuracy of a test result is affected due to the fact that the traditional nonlinear resistance tester lacks a temperature and humidity detection means. In order to achieve the above purpose, the application provides a nonlinear resistance tester with temperature and humidity detection function, which comprises a temperature and humidity detection module, a collection switch, an upper computer and a resistance test module, wherein, The temperature and humidity detection module comprises a comparison unit, a temperature gear selection unit, a humidity gear selection unit, a temperature detection unit, a humidity detection unit and a trigger unit, wherein the temperature gear selection unit, the humidity gear selection unit, the temperature detection unit, the humidity detection unit and the trigger unit are connected with the comparison unit; The trigger unit is also connected with the acquisition switch, the acquisition switch is respectively connected with the upper computer, the resistor to be tested and the resistor testing module, and the resistor testing module is also connected with the resistor to be tested. In an embodiment, the comparing unit comprises a temperature comparing unit and a humidity comparing unit, both of which are connected with the triggering unit, wherein, The temperature comparison unit is also respectively connected with the temperature detection unit and the temperature gear selection unit; the humidity comparison unit is also respectively connected with the humidity detection unit and the humidity gear selection unit. In one embodiment, the temperature range selection unit includes a temperature range selection assembly, an upper temperature limit adjustment assembly, and a lower temperature limit adjustment assembly, the humidity range selection unit includes a humidity range selection assembly, an upper humidity limit adjustment assembly, and a lower humidity limit adjustment assembly, wherein, The temperature range selection assembly is respectively connected with the temperature upper limit adjustment assembly and the temperature lower limit adjustment assembly, and the temperature upper limit adjustment assembly and the temperature lower limit adjustment assembly are also connected with the temperature comparison unit; the humidity range selection assembly is respectively connected with the humidity upper limit adjusting assembly and the humidity lower limit adjusting assembly, and the humidity upper limit adjusting assembly and the humidity lower limit adjusting assembly are also connected with the humidity comparison unit. In one embodiment, the temperature comparing unit includes an upper temperature limit comparator, a lower temperature limit comparator, a first diode, a second diode, a first resistor, a second resistor, and a first voltage regulator tube, wherein, The first input end of the temperature upper limit comparator is connected with the temperature upper limit adjusting component, the second input end of the temperature upper limit comparator is connected with the temperature detecting unit, the output end of the temperature upper limit comparator is connected with the anode of the first diode, the cathode of the first diode is connected with one end of the first resistor, the