Automatic calibration method and equipment for electronic temperature measurement equipment having micro-control unit

Abstract

The invention relates to an automatic calibration method and equipment for electronic temperature measurement equipment having a micro-control unit. The electronic temperature measurement equipment having the micro-control unit is in the preset constant temperature test environment. The automatic calibration method of the automatic calibration equipment comprises steps that (1), the present theoryreference oscillation frequency XRF of a built-in reference resistor is taken as basis by the electronic temperature measurement equipment, and the test oscillation frequency XRS of a present test resistor is determined; (2), calculation is carried out through the micro-control unit according to an equation set as described in the specifications; (3), the actual oscillation frequency X'RF of thereference resistor is solved based on the equation set of the step (2); and (4), the actual oscillation frequency X'RF of the reference resistor is utilized to replace the present theory reference oscillation frequency XRF of the system built-in reference resistor, the actual oscillation frequency X'RF is taken as the new present theory reference oscillation frequency and stored in the micro-control unit, and calibration work of the electronic temperature measurement equipment is accomplished. The method and the equipment are advantaged in that calibration of the electronic temperature measurement equipment can be effectively carried out, efficiency is high, and cost is low.

Description

technical field [0001] The invention relates to the field of automatic calibration, in particular to the field of automatic calibration in electronic temperature measuring equipment, in particular to an automatic calibration method and equipment for electronic temperature measuring equipment with a micro control unit. Background technique [0002] In the electronic temperature measuring equipment in the prior art, such as the electronic thermometer, during production, a reference resistor is compared with the thermistor to test the temperature of the human body. Since it is the reference resistor and thermistor, there must be Error, even the high-precision resistance, because of the process and PCB version, there will be error, the error will cause the test error, and the manufacturing standard of the thermometer is the accuracy of ±0.1 ℃, for example, a person's body temperature is 36.7 ℃ , but the actual test is 36.9°C or 36.5°C, then it exceeds the manufacturing standard,...

AI Technical Summary

Problems solved by technology

[0002] In the electronic temperature measuring equipment in the prior art, such as the electronic thermometer, during production, a reference resistor is compared with the thermistor to test the temperature of the human body. Since it is the reference resistor and thermistor, there must be Error, even the high-precision resistance, because of the process and PCB version, there will be error, the error will cause the test error, and the manufacturing standard of the thermometer is the accuracy of ±0.1 ℃, for example, a person's body temperature is 36.7 ℃ , but the actual test is 36.9°C or 36.5°C, then it exceeds the manufacturing standard, and this product is unqualified. At present, when all thermometer manufacturers encounter the accuracy of the thermometer exceeding the manufacturing standard during production, the method they use is to replace it. The reference resistance or the test resistance, that is, the method of thermistor is used to adjust. After one to several resistance replacements, the measurement accuracy meets the manufacturing standard. This method is indeed effective and feasible. However, this technology is virtually Increased production costs and reduced production efficiency

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