Subject:

Coal Science and Technology (a subject); mine electrical engineering (two subjects); coal mine monitoring and control (three subjects)

1. Chemical sensor CO sensor

Belongs to chemical sensors. The chemical sensor consists mainly of two parts: the identification system; the conduction or conversion system.

The identification system links a chemical parameter (here the gas concentration) of the object to be tested to the conduction system. It mainly has two functions: selectively interacting with the object to be tested, converting the measured chemical parameters into a conduction system, and generating a response signal.

The molecular recognition system is a key factor in determining the entire chemical sensor. Therefore, the main problem in chemical sensor research is the choice of molecular recognition systems and how to link molecular recognition systems to appropriate conduction systems.

The conduction system of the chemical sensor receives the response signal of the identification system and transmits the response signal to the electronic system (ie, the conditioning circuit) for amplification by means of an electrode, an optical fiber or a mass sensitive component, or The conversion output is performed, and finally the response signal of the identification system is converted into a signal that can be used as an analysis, and the amount of the object to be tested in the sample is detected.

The chemical CO gas sensor adopts a closed structure design, and its structure is composed of an electrode, a filter, a gas permeable membrane, an electrolyte, an electrode lead wire (pin), a casing and the like.

Chemical sensor

Molecular knowledge

System conduction system conditioning circuit

Digital quantity

Monitor

Second, electrochemical CO sensor

CO electrochemical gas sensor can be used together with the alarm. It is the core detection component in the alarm. It is based on constant potential electrolysis. When CO diffuses into the gas sensor, its output produces a current output that is supplied to the sampling circuit in the alarm, which acts to convert chemical energy into electrical energy.

When the gas concentration changes, the output current of the gas sensor also changes in proportion, and the intermediate circuit of the alarm is used to convert the amplified output to drive different actuators to complete the detection and alarm functions of sound, light and electricity. Together with the corresponding control device, it constitutes an environmental detection or monitoring alarm system.

Recommended for residential electrochemical CO sensor - TGS5042.