Temperature drift reducing device and control method thereof

A control method and single-chip microcomputer technology, applied in the electronic field, can solve problems such as deviation and change, and achieve the effects of low cost, high efficiency, and reduced temperature drift

Inactive Publication Date: 2012-10-03
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the temperature, humidity and loss of use in the working environment, the resistance value provided by each scale has changed, and the influence of temperature is more serious, which makes the output voltage value deviate from the ideal voltage value.

Method used

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  • Temperature drift reducing device and control method thereof
  • Temperature drift reducing device and control method thereof
  • Temperature drift reducing device and control method thereof

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with accompanying drawing:

[0024] The purpose of the present invention is to form a system (provide bias voltage for the infrared focal plane display device) through the construction of the hardware circuit and the software program, and use the feedback principle to reduce the impact of the temperature, humidity and loss changes on the ADN2850 controllable potentiometer. Influence of resistance value accuracy.

[0025] The invention provides a hardware device, including a computer, a single-chip microcomputer, an adjustable potentiometer, an operational amplifier circuit and a four-channel analog-to-digital A / D converter, wherein: ① the computer controls sending and receiving data, and is bidirectionally connected with the single-chip microcomputer, both The data communication between adopts the RS232 protocol, the single-chip computer input type is connected to the adjustable potentiometer, and is b...

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PUM

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Abstract

The invention discloses a temperature drift reducing device, which is characterized by comprising a computer, a singlechip, a regulable potentiometer, an operational amplifier circuit and a four-channel analogue-to-digital (A / D) converter, wherein the computer controls the transmitting and receiving of data and is bidirectionally connected with the singlechip; data communication between the computer and the singlechip adopts an RS232 protocol; the singlechip is in input connection with the regulable potentiometer and is bidirectionally connected with the four-channel analogue-to-digital (A / D)converter; the regulable potentiometer is in monodirectional input connection with the operational amplifier circuit; and the operational amplifier circuit is respectively in input connection with the four-channel analogue-to-digital (A / D) converter and an infrared focal plane array.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a device for reducing temperature drift and a control method thereof. Background technique [0002] In electronic circuits, it is often necessary to provide one or more controllable real-time voltage values ​​for chips and devices. In order to achieve this purpose, a single-chip microcomputer and an adjustable potentiometer are generally used to form a module, and the single-chip microcomputer is used to control the setting of the resistance value of the potentiometer. set to provide accurate bias values. The potentiometer that will be used in the present invention is ADN2850, and ADN2850 has 1024 selection resistance values ​​altogether, is about to divide its measuring range equally, the selection of output voltage value and resistance value should be a kind of linear relationship theoretically. However, due to the temperature, humidity and loss of use in the working envir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/56
Inventor 刘子骥蒋亚东吴志明舒亚硕雷延钊
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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