Temperature relay test board based on single-chip microcomputer and control method thereof

Abstract

The invention belongs to the technical field of temperature relay detection, and discloses a single-chip microcomputer-based temperature relay test board and a control method thereof, and the single-chip microcomputer-based temperature relay test board comprises a single-chip microcomputer control circuit, a power supply circuit, a trigger circuit, a test circuit, a serial port circuit, a display circuit and a reset circuit. The power supply circuit is used for supplying power to the whole device; the trigger circuit is used for controlling detection of the temperature sensor and data transmission; the test circuit is used for collecting temperature data signals; the serial port circuit is used for sending collected temperature data signals to the single-chip microcomputer control circuit. The single-chip microcomputer control circuit is used for processing the temperature data signals. The circuit auxiliary device is simple in structure, easy to implement and low in manufacturing cost, the circuit auxiliary device is not provided with a temperature system and a data display system and can be connected with various temperature boxes and the data display system, an LCD display screen is designed in the circuit and can be directly matched with the temperature boxes to independently display test values, and the measurement purpose is achieved.

Description

technical field [0001] The invention belongs to the technical field of temperature relay detection, in particular to a temperature relay test board based on a single-chip microcomputer and a control method thereof. Background technique [0002] At present, as a non-electrical control temperature relay, it is widely used in industrial control, information industry, household appliances, national defense industry and other fields. Instantaneous disc bimetal temperature relays are used the most due to their large load current, simple structure, low cost and reliable operation. If the electrical characteristics such as the operating temperature, recovery temperature and contact resistance of the temperature relay cannot be measured correctly, it will trouble both production and use. According to the provisions of GJB1517-92 "General Specification for Thermostatic Relays", there are three methods for the detection of temperature relays, including liquid measurement method, air m...

AI Technical Summary

Problems solved by technology

[0009] 1. The accuracy of the result is low: the tool used in the above test method is a hand-held multimeter, and the temperature relay is measured according to the buzzer prompt, and then the real-time data of the thermostat is recorded. The accuracy of the data record depends on whether the operator is on the temperature relay. Observe the temperature displayed by the incubator immediately after the action, and record it. During this process, the tester has to detect 5 devices at the same time, so there is a certain error, which affects the accuracy of the result;

[0010] 2. The test efficiency is low: as mentioned above, the equipment is not interrupted during the process of recording data after the temperature relay is judged by human power. If too many devices are measured at the same time, the operating temperature point of the device may be missed, thereby affecting the test accuracy.

In order to improve the accuracy of the test, the number of temperature relays for a single measurement cannot exceed 5, so the efficiency cannot be improved;

[0011] It can be seen from the above two problems that the fundamental problem that caused the above problems is that the tool used in the test is a hand-held multimeter that cannot automatically prompt the action of the temperature relay, and there is a certain error in the process of human judgment and recording. In order to effectively reduce the error So sacrificed efficiency

[0012] Through the above analysis, the existing problems and defects of the existing technology are: the accuracy of the results of the existing temperature relay test method is low, and the test efficiency is low

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