Device for improving temperature measurement accuracy in complex environment

A technology for temperature measurement and complex environment. It is used in measurement devices, thermometers, and heat measurement. It can solve problems such as external electromagnetic environment, complex internal assembly wiring, and interference, and achieve the effect of reducing common mode interference and improving accuracy.

Inactive Publication Date: 2014-11-19
BVCH OPTRONICS SICHUAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Especially in the field of engineering applications, the external electromagnetic environment and internal assembly wir

Method used

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  • Device for improving temperature measurement accuracy in complex environment
  • Device for improving temperature measurement accuracy in complex environment
  • Device for improving temperature measurement accuracy in complex environment

Examples

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Embodiment Construction

[0011] The invention aims at proposing a device for improving the accuracy of temperature measurement in a complex environment, improving the anti-interference ability, and making the temperature data obtained by measurement have higher reliability. In the present invention, the core components composed of a twisted pair, an equi-arm bridge and a differential amplifier are used to reduce the common-mode interference in the signal pickup path, and to reduce the unevenness of the equi-arm bridge caused by the temperature change of the thermistor. The measurement is sent to the differential amplifier in the form of voltage, and finally the output signal of the differential amplifier is provided to the analog / digital conversion circuit for subsequent processing such as voltage sampling.

[0012] Below in conjunction with accompanying drawing and embodiment the scheme of the present invention will be further described:

[0013] like figure 1 As shown, the device in this example in...

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Abstract

The invention relates to temperature measurement technologies and discloses a device for improving the temperature measurement accuracy in complex environment. The antijamming capability is improved, so that temperature data obtained by measurement have higher reliability. A core assembly composed of a twisted pair, an equal-arm bridge and a differential amplifier is adopted, common-mode interference in a signal pickup path is reduced, the equal-arm bridge unbalance amount, caused by temperature changes, of a thermistor is fed into the differential amplifier in a voltage mode, and finally the differential amplifier outputs signals to be provided for an analog-to-digital conversion circuit to carry out voltage sampling or other subsequent processing. The device is applicable to temperature measurement in the complex environment.

Description

technical field [0001] The invention relates to temperature measurement technology, in particular to a device for improving the accuracy of temperature measurement in complex environments. Background technique [0002] In order to be able to grasp the temperature of the heating components in the liquid crystal module products, so as to effectively control them so that they can work within the normal temperature range, it is necessary to take corresponding measures to obtain accurate temperature values ​​in a certain way, and provide them to The back-end control part completes the temperature regulation function. Especially in the field of engineering applications, the external electromagnetic environment and internal assembly wiring are relatively complex, and the temperature measurement process will undoubtedly be subject to various interferences. [0003] Therefore, it is necessary for the present application to propose a device for improving the accuracy of temperature m...

Claims

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Application Information

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IPC IPC(8): G01K7/25
Inventor 杨伟茂
Owner BVCH OPTRONICS SICHUAN
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