Galvanometer imaging laser telemeter and gas concentration information imaging method

Abstract

The invention provides a galvanometer imaging laser telemeter and a gas concentration information imaging method, relates to the technical field of measurement by using optical means, and can be usedfor integrating live-action information and concentration information. The laser telemeter comprises a camera, a driving circuit, a laser, a collimating lens, a galvanometer, an optical receiving system, a signal processing circuit and a display system, the driving circuit controls the laser to emit laser, the laser penetrates through the collimating lens, is reflected by the galvanometer and penetrates through gas to reach the surface of an object, the optical receiving system receives the laser diffusely reflected by the surface of the object, the signal processing circuit converts the laserinto concentration information, and the display system displays the image information and the concentration information of the camera in an overlapped mode. The laser telemeter can draw an observed gas mass shape by utilizing concentration information in each pixel point, and in addition, the refresh speed of a gas concentration picture can be improved by utilizing a difference calculation method. The telemeter and the imaging method also have the advantages of high precision, vividness, intuitiveness, high refreshing speed and the like.

Description

technical field [0001] The invention relates to the technical field of measurement by optical means, in particular to a laser telemeter for galvanometer imaging and a gas concentration information imaging method. Background technique [0002] Laser telemetry equipment refers to equipment that uses actively emitted laser light to detect gas concentrations. Among them, the laser methane remote detector adopts tunable diode laser absorption spectroscopy (TDLAS), which can detect methane gas within a certain distance. The laser methane remote meter does not need to place the probe in a gas-filled environment, but the device emits a laser beam. The laser passes through the space above the pipeline or facility, hits the object at the other end, is reflected back to the receiver by the object, and then is detected Converted into electrical signals, these signals are used to analyze the concentration of methane. The laser methane remote detector can achieve extremely high detection...

AI Technical Summary

Problems solved by technology

According to the technical characteristics of the laser methane remote detector, the laser methane remote detector can only measure the gas concentration on the path of the laser, and the laser beam is usually a small size, and the laser methane remote detector usually needs to move the device by hand in the process of finding the leak , let the laser emitted by the equipment gradually sweep over the suspicious leak point until the laser sweeps over the leaked methane gas mass, and then the leak point can be judged according to the leaked gas mass. Low work efficiency when the area is large

[0003] In addition, infrared gas cloud imaging equipment includes a set of infrared imaging lenses, a sensor that can respond to infrared light, and an algorithm for calculating gas concentration. Its principle is to use infrared light reflected in nature to image through infrared lenses and infrared sensors. When the received infrared light passes through the measured air mass, the light passing through the air mass will be absorbed by the measured gas. Compared with other unabsorbed light, the light intensity absorbed by these gases is weaker, and finally measure the location of the air mass by analyzing the light intensity contrast. Position, this kind of equipment can measure a variety of gases, but it uses natural passive infrared light measurement, which is greatly affected by the natural environment. At the same time, because the measurement principle is to calculate the concentration according to the difference in light intensity, the measurement accuracy is very low, and the general accuracy is the highest. can only reach 100ppm. m, and the accuracy of the laser principle can reach 5ppm. m

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