A device that converts the CO concentration variable in the air into a corresponding output signal. Subject: Coal Science and Technology (first-level discipline); mine electrical engineering (second-level discipline); coal mine monitoring and control (third-level discipline) 1. Chemical sensor CO sensor Belongs to chemical sensors. Chemical sensors are mainly composed of two parts: identification system; conduction or conversion system. The identification system connects a certain chemical parameter (in this case, gas concentration) of the object to be measured with the conduction system. It has two main functions: it selectively interacts with the object to be tested, and converts the measured chemical parameters into a conduction system, which can generate a response signal. The molecular recognition system is a key factor that determines the entire chemical sensor. Therefore, the main problem of chemical sensor research is the choice of molecular recognition system and how to connect the molecular recognition system with the appropriate conduction system. The conduction system of the chemical sensor receives the response signal of the recognition system, and transmits the response signal in the form of changes in voltage, current or light intensity through electrodes, optical fibers or quality sensitive components to the electronic system (i.e. conditioning circuit) for amplification, or The conversion output is carried out, and finally the response signal of the recognition system is transformed into a signal that can be used for analysis by people to detect the amount of the analyte in the sample. The chemical CO gas sensor adopts a closed structure design, and its structure is composed of electrodes, filters, breathable membranes, electrolyte, electrode lead wires (pins), shells and other parts. Chemical sensor Molecular awareness Different system conduction system conditioning circuit Digital quantity Monitor Two, electrochemical CO sensor The CO electrochemical gas sensor can be used in conjunction with the alarm. It is the core detection element in the alarm. It is based on the basic principle of constant potential electrolysis. When CO diffuses to the gas sensor, its output terminal produces a current output, which is provided to the sampling circuit in the alarm, and plays the role of converting chemical energy into electrical energy. When the gas concentration changes, the output current of the gas sensor also changes proportionally. Through the intermediate circuit of the alarm, the amplified output is converted 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.
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