Automatic calibration circuit structure of temperature measuring device and automatic calibration method
A technology of automatic calibration and temperature measurement device, applied in measurement device, thermometer test/calibration, thermometer and other directions, can solve the problems of reducing production efficiency, reducing output, errors, etc. Effect
Active Publication Date: 2018-04-06
CRM ICBG (WUXI) CO LTD
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[0002] Electronic temperature measuring equipment has been widely used in daily life, such as electronic thermometers. Most of these temperature measuring equipment use a reference resistor to compare with a thermistor to test the temperature of the human body. Since it is a reference resistor and a thermistor, The resistance is bound to have errors. Even if the resistance is high-precision, there will be errors due to process reasons and material reasons. Errors will cause test errors. The manufacturing standard of thermometers is that the accuracy should be ±0.1°C, such as a person's body temperature It is 36.7°C, but the actual test is 36.9°C or 36.5°C, then it exceeds the manufacturing standard, and this electronic thermometer is unqualified
At present, when all electronic thermometer manufacturers are in production, when the accuracy of the electronic thermometer exceeds the manufacturing standard, the method used is to replace the reference resistor or thermistor to adjust. After one or more resistor replacements, the measurement accuracy Until the manufacturing standard is met, this method is indeed effective and feasible, but the existing technology has virtually increased the cost of production, reduced production efficiency, and reduced daily output. It is even possible that one replacement cannot To change to a suitable resistor, you need to replace it more than twice
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[0036] In order to describe the technical content of the present invention more clearly, further description will be given below in conjunction with specific embodiments.
[0037] The implementations described in the following exemplary embodiments do not represent all implementations consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present application as recited in the appended claims.
[0038] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to limit the application. As used in this application and the appended claims, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0039] In the automatic calibration circuit structure and...
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The invention relates to an automatic calibration circuit structure of a temperature measuring device and an automatic calibration method. The temperature measuring device comprises an outer referenceresistor and an outer measuring resistor, the automatic calibration circuit structure of the temperature measuring device comprises an automatic calibration main control module, a measurement module,an internal data register module, a comparator module, a shift register module and a selector module, wherein all the modules are mutually connected, and the automatic calibration method of the temperature measuring device is further employed to realize calibration of the temperature measuring device. The automatic calibration circuit structure is advantaged in that through adjusting the reference oscillation number, calibration of the temperature measuring device is satisfied on the condition that the reference resistor is not changed, measuring precision is made to reach manufacturing standards, efficiency is effectively improved, and production cost is reduced.
Description
technical field [0001] The invention relates to the field of detection, in particular to the field of temperature detection and calibration; in particular, it refers to an automatic calibration circuit structure and an automatic calibration method in a temperature measuring device. Background technique [0002] Electronic temperature measuring equipment has been widely used in daily life, such as electronic thermometers. Most of these temperature measuring equipment use a reference resistor to compare with a thermistor to test the temperature of the human body. Since it is a reference resistor and a thermistor, The resistance is bound to have errors. Even if the resistance is high-precision, there will be errors due to process reasons and material reasons. Errors will cause test errors. The manufacturing standard of thermometers is that the accuracy should be ±0.1°C, such as a person's body temperature It is 36.7 ℃, but the actual test is 36.9 ℃ or 36.5 ℃, then it exceeds th...
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IPC IPC(8): G01K15/00
CPCG01K15/005
Inventor 王磊
Owner CRM ICBG (WUXI) CO LTD