Gas detector for two-wire system displaying through digital tube

Abstract

The invention discloses a gas detector for a two-wire system displaying through a digital tube. The gas detector comprises a current protection limiting module, a power conversion module, a digital tube control module, a current signal control module, an MCU (Micro Controller Unit), an infrared control module and a sensor module, wherein the current protection limiting module is electrically connected between an external power supply and the power conversion module; the current protection limiting module is electrically connected with the current signal control module and is used for supplying a working voltage to the current signal control module; and the MCU is respectively in electric connection with the current signal control module, the digital tube control module, the infrared control module and the sensor module.

Description

technical field [0001] The invention relates to the field of gas detection, in particular to a two-wire gas detector displayed by a digital tube. Background technique [0002] Wiring in industrial environments often accounts for a large proportion of project costs. Considering cost and safety, two-wire detectors came into being. [0003] In the prior art, the two-line gas detectors all use liquid crystals as the concentration display. As a concentration display, liquid crystal itself has two major disadvantages: 1. It does not have the ability to emit light independently, and it cannot be seen clearly when the ambient light is low; 2. The effect of low temperature is poor, and the response in winter is slow and cannot be seen clearly. [0004] Using digital tube display can solve the above problems well. However, the static power consumption of the digital tube is large, limited by the limitation of the static energy provided by the two-wire pair. At present, no other manu...

AI Technical Summary

Problems solved by technology

As a concentration display, liquid crystal itself has two major disadvantages: 1. It does not have the ability of self-luminescence, and it cannot be seen clearly when the ambient light is low; 2. The effect of low temperature is poor, and the response in winter is slow and cannot be seen clearly.

However, the static power consumption of the digital tube is large, which is limited by the limitation of the static energy provided by the two-wire pair. At present, no other manufacturers at home and abroad provide gas detectors that can be applied to the two-wire digital tube display.

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