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Temperature checker

A calibrator and temperature measurement technology, applied in the field of temperature calibrator, can solve the problems of bulky function and expensive

Inactive Publication Date: 2012-08-01
安徽中凌电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing temperature calibration instruments are mainly electronic potentiometers such as UJ36 and the newly emerging digital calibration instruments based on D / A conversion, but the former is heavy and poor in function, and the latter is extremely expensive

Method used

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  • Temperature checker

Examples

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Embodiment 1

[0007] Embodiment 1: A kind of temperature calibrator

[0008] The invention relates to a temperature calibrator, which is made portable and used for calibrating the display value of a temperature measuring instrument in operation on site. Its circuit structure is as figure 1 As shown, it consists of a power supply 1, a display module 2, a single-chip microcomputer module 3, a photocoupler 4, a DC power supply voltage module 5, an input electronic switch module 6, a storage module 7, a filter amplifier circuit module 8, and an output electronic switch module 9. Wherein the single-chip microcomputer module 3 is used to generate the pulse width modulation signal, and the pulse width modulation signal is sent to the input electronic switch module 6 through the photocoupler 4, so that it controls the electronic switch according to the duty ratio of the pulse width modulation signal, and is used to turn on and turn off the DC stable voltage of the DC supply voltage module 5 . The...

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Abstract

The invention discloses a temperature checker. The temperature checker simulates a millivolt signal which is generated by a temperature sensor, and compares and checks display values of a temperature measurement instrument which operates on the site to judge whether the temperature measurement instrument fails. The temperature checker has the advantages that a method for generating a pulse width modulation signal by using a singlechip timer is directly employed, constant direct current power voltage is modulated into a pulse voltage sequence with certain frequency and variable width, input set values are in one-to-one correspondence to temperature check points, the set values are corrected according to compensation values, and output of a check millivolt signal is realized.

Description

(1) Technical field: [0001] The invention relates to a temperature calibrator, which simulates the millivolt signal generated by a temperature sensor, and compares and verifies the display value of a temperature measuring instrument in field operation, thereby judging whether the temperature measuring instrument has a fault. (two) background technology: [0002] Resistance furnaces are widely used in the industrial production process. Each resistance furnace is equipped with temperature sensors and temperature measuring instruments. If the temperature measuring instrument fails during the production process, the display value of the instrument will be wrong, and the product will be scrapped at least, and the product will be damaged. The resistance furnace must be scrapped, so the display value of the temperature measuring instrument must be checked frequently during the production process to judge whether the temperature measuring instrument is faulty, so as to deal with it i...

Claims

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Application Information

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IPC IPC(8): G01K15/00
Inventor 张金木
Owner 安徽中凌电子科技有限公司
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