Light source control method in ultraviolet gas analyzer

Abstract

The invention provides a method for controlling a light source in an ultraviolet gas analyzer. The method comprises the following steps: a. a control processor sends a starting command to a light source controller, and the light source generates light; b. a spectrograph is started to acquire data of the light source; c. after data acquisition is ended, the light source controller is controlled to be shut down; d. the acquired data is processed, and after data processing is ended, step a is repeated. According to the invention, the processor is used as a main part to control the light on and off states of the light source controller, thereby improving the efficiency of data acquisition and data processing and greatly increasing the operating rate of the ultraviolet analyzer product; and in addition, power supply isolation, signal isolation and a monitoring circuit are adopted to protect the circuit of the light source controller, so that the spectroscopic data obtained by the ultraviolet analyzer is more safe and reliable.

Description

technical field [0001] The invention relates to the field of environment, in particular to a light source control method in an ultraviolet gas analyzer. Background technique [0002] In the current field of gas analysis, although there are many DOAS-based gas analyzer research institutions in my country, the current automatic monitoring system of ambient air quality in China basically relies on the introduction of foreign technology and equipment, and the existing systems are often good and bad; domestic research and development levels and capabilities are limited; The combination of imported equipment and my country's actual situation is not enough, especially in system structure, data acquisition, remote control and diagnosis, which are far from actual needs. [0003] In the existing ultraviolet gas analyzers, the pulse timing control method is adopted for the on and off control of the pulse xenon lamp light source, that is, the light source is on and the spectrometer colle...

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Problems solved by technology

[0002] In the current field of gas analysis, although there are many DOAS-based gas analyzer research institutions in my country, the current automatic monitoring system of ambient air quality in China basically relies on the introduction of foreign technology and equipment, and the existing systems are often good and bad; domestic research and development levels and capabilities are limited; The combination of imported equipment and the specific reality of our country is not enough, especially in terms of system structure, data acquisition, remote control and diagnosis, which are far from the actual needs

[0003] In the existing ultraviolet gas analyzers, the pulse timing control method is adopted for the on and off control of the pulsed xenon lamp light source, that is, the light source is on and the spectrometer collects data, and after the data collection is completed, the DOAS algorithm is processed and the data is processed after the light source is off. After the completion, send it to the processor, then wait for the xenon lamp light source to turn on the light source again when the timing time is up, and wait for the spectrometer to collect data when the light source is on. After the data collection is completed, wait for the light source to go out to perform DOAS algorithm processing. Such a processing algorithm has a slow operation speed, therefore, a method is needed to improve the operation speed of the UV analyzer product

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