Multi-channel thermal resistance input module verification device and system

A technology of input modules and calibration devices, which is applied in the direction of using electrical devices, measuring devices, and thermometers using electric/magnetic elements that are directly sensitive to heat, can solve the problem of poor control of calibration accuracy and devices required for calibration Large volume and other problems, to achieve the effect of improving calibration accuracy, reducing equipment costs and labor costs, and improving factory pass rate and production efficiency

Pending Publication Date: 2022-04-22
重庆川仪控制系统有限公司
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) The volume of the device required for calibration is large;
[0005] (2) Calibration accuracy is not easy to control

Method used

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  • Multi-channel thermal resistance input module verification device and system
  • Multi-channel thermal resistance input module verification device and system
  • Multi-channel thermal resistance input module verification device and system

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Embodiment Construction

[0038] The implementation of the present invention is illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0039] It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the present invention. Limiting conditions, so there is no technical substantive meaning, any modification of structure, change of proportional relationship or adjustment of size, without affecting the effect and purpose of the present invention, should still fall within the scope of the present invention. The disclosed technical content must be within the scope covered. At the same time, terms such as "upper", "low...

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Abstract

The invention provides a multi-channel thermal resistance input module verification device and system, and the device comprises a precision resistor which is connected with a to-be-verified channel of a multi-channel thermal resistance input module, and generates a voltage through a constant current source configured by the multi-channel thermal resistance input module; the voltage sampling module is used for collecting the sampling voltage on the precision resistor; the micro-processing module is connected with the voltage sampling module and is used for acquiring a constant current value of the constant current source based on the sampling voltage and the precision resistor and calculating a voltage value corresponding to the thermal resistance to be output based on the constant current value and the thermal resistance to be output; and the voltage output module is connected with the micro-processing module and is used for outputting the voltage value to the multi-channel thermal resistance input module. According to the multi-channel thermal resistance input module verification device and system, verification of each channel of the thermal resistance input module is realized based on the voltage signal, the verification accuracy is effectively improved, and the size of the verification device is reduced.

Description

technical field [0001] The invention relates to a verification device, in particular to a multi-channel thermal resistance input module verification device and system. Background technique [0002] Thermal resistance (thermal resistor) is the most commonly used temperature detector in the middle and low temperature area. It is based on the characteristic that the resistance value of the metal conductor increases with the increase of temperature to measure the temperature. It has the advantages of high measurement accuracy and stable performance. . Therefore, thermal resistance is not only widely used in industrial temperature measurement, but also made into a standard reference instrument. [0003] Therefore, the accurate measurement of thermal resistance is of great significance. The multi-channel thermal resistance input module is a commonly used thermal resistance acquisition device. In the prior art, the verification of the multi-channel thermal resistance input modul...

Claims

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Application Information

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IPC IPC(8): G01K15/00G01K7/16
CPCG01K15/005G01K7/16
Inventor 王朝栋
Owner 重庆川仪控制系统有限公司
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