Self-inspection type temperature probe detection circuit

A detection circuit and temperature probe technology, applied in the direction of thermometer testing/calibration, thermometers, measuring devices, etc., can solve the problems that the detection results are easily affected by human factors, time-consuming and laborious, and affect the accuracy of the detection results, so as to improve the detection results. Speed ​​and detection accuracy, excluding the influence of human factors, the effect of high accuracy

Inactive Publication Date: 2013-11-27
GUANGZHOU FORESTON TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] When the temperature probe of the existing temperature-measuring electrical fire detector needs to be overhauled, the temperature probe needs to be disassembled first, and then the various working performances of the temperature-measuring probe are tested

Method used

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  • Self-inspection type temperature probe detection circuit

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Embodiment Construction

[0022] Below in conjunction with accompanying drawing and specific embodiment, the present invention will be further described:

[0023] See figure 1 , the present invention relates to a self-checking temperature probe detection circuit, and its preferred embodiment includes a digital temperature probe U1, a master optocoupler PC2, a slave optocoupler PC1, a processor 10, a diode D1 to a diode D4, for providing a direct current Voltage supply module 20, resistors R1 to resistors R5. The master photocoupler PC2 is composed of a master light emitter PC2A and a master photoreceiver PC2B, and the slave photocoupler PC1 is composed of a slave emitter PC1A and a slave photoreceiver PC1B.

[0024] The anode of the main light emitter PC2A is connected to the power supply module 20 through a resistor R4, the negative pole of the main light emitter PC2A is connected to the processor 10, and connected to the power supply module 20 through a resistor R5, and the output end of the main li...

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PUM

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Abstract

A self-inspection type temperature probe detection circuit comprises a digital temperature probe, a processor module and a reverse binary-channel module. The reverse binary-channel module comprises a master signal path, a slave signal path, a master input-output end and a slave input-output end. A processor is used for sending low-level detection signals, and the master signal path transmits the low-level detection signals. If in a preset waiting time frame, the digital temperature probe sends out low-level response signals, the slave signal path transmits the low-level response signals and sends the low-level response signals to the processor, and the processor does not send out fault warnings. If the processor does not receive the low-level response signals after the waiting time frame, the processor sends out the low-level detection signals again. If the low-level detection signals are sent out for preset times and the processor does not receive the low-level response signals, the fault warnings are sent out. The self-inspection type temperature probe detection circuit can automatically detect the fault of whether the temperature probe normally carries out reading and the reading is accurate or not, time and labor are saved, and the detection result is high in accuracy.

Description

[0001] technical field [0002] The invention relates to a self-checking temperature probe detection circuit. [0003] Background technique [0004] When the temperature probe of the existing temperature-measuring electrical fire detector needs to be overhauled, the temperature probe needs to be disassembled first, and then the various working performances of the temperature-measuring probe are tested by special testing equipment to determine whether the temperature-measuring probe has a working fault , this maintenance method is time-consuming and laborious, and the test results are easily affected by human factors, which affects the accuracy of the test results. [0005] Contents of the invention [0006] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a self-checking temperature probe detection circuit, which can detect the temperature probe conveniently, quickly and accurately. [0007] To achieve the above object, the...

Claims

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Application Information

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IPC IPC(8): G01K15/00
Inventor 徐添增杨鹏飞叶绍亮宋志涛
Owner GUANGZHOU FORESTON TECH
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