A device and method for detecting the concentration of acetylene gas by photo-induced ultrasonic method

Abstract

The invention discloses a device and method for detecting the concentration of acetylene gas by using photo-induced ultrasonic method. Detectors, temperature sensors, pressure sensors, lock-in amplifiers, data acquisition cards, computers. Based on the above device, the non-contact measurement of the acetylene gas concentration can be realized quickly, accurately, with high sensitivity and high resolution, and the occurrence of fatal accidents caused by acetylene gas poisoning can be effectively avoided. Using temperature and pressure to correct the monitoring value of the concentration can effectively reduce the influence of environmental factors on gas detection and greatly improve the measurement accuracy of the system. The use of ultrasonic imaging to detect gas concentration can reduce the interference of other gas components and environmental noise, and the detection speed is faster and the sensitivity is higher.

Description

technical field [0001] The invention belongs to the technical field of trace gas detection, and relates to a device and method for rapidly and accurately detecting the concentration of acetylene gas, in particular to a device and method for detecting trace acetylene gas by using a photo-induced ultrasonic method. Background technique [0002] Acetylene gas has important applications in metal cutting and welding, and it is also an important organic raw material. However, acetylene gas is colorless, flammable and explosive. When the concentration of acetylene gas in the air reaches 2.3-72.3%, it is very easy to cause an explosion accident. Therefore, accurate and real-time detection of the concentration of acetylene gas in industrial sites is of great significance to ensure the safety of production and workers. At the same time, the quality of fruits can be judged by measuring the concentration of acetylene gas volatilized by strawberries and raspberries. [0003] Gas concent...

AI Technical Summary

Problems solved by technology

Due to the need to sample the gas to be measured, the non-spectral method has a long response time and cannot be monitored in real time. At the same time, it is greatly affected by the external environment. Factors such as temperature, pressure, vibration, etc. have a greater impact on the measurement results, especially when the gas concentration distribution is uneven. , the error of the measurement result is very large. When dealing with the actual industrial and agricultural field environment, the manufacturing and maintenance costs of the equipment are very high, the cost performance is low, and the concentration measurement of most gases cannot be achieved.

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