Ultraviolet photoelectric microsensor device for monitoring water quality on line and monitoring method

Abstract

The invention discloses an ultraviolet photoelectric microsensor device used for monitoring water quality on line, which comprises an ultraviolet light source, an ultraviolet detector, a data acquisition and transmission module, a bracket and a seal cover. A water flow sample to be monitored is placed between the ultraviolet light source and the ultraviolet detector, wherein the ultraviolet light source and the ultraviolet detector are fixed on the bracket, two ends of the ultraviolet light source are connected with a power supply through a lead, and two ends of the ultraviolet detector are connected with the data acquisition and transmission module through a lead. The ultraviolet photoelectric microsenser device is characterized in that the ultraviolet light source, the ultraviolet detector and the stand are encapsulated in the seal cover, the ultraviolet detector comprises a GaN based Schottky type ultraviolet detector, and a response window of the ultraviolet detector corresponds to the center wavelength of an LED; and the ultraviolet light source consists of 3-7 ultraviolet LEDs with the wavelength covering a region ranging from 200nm to 400nm. The device has small volume and low power consumption, can timely and accurately monitor the change conditions of environmental pollution indexes (such as TOC (Total Organic Carbon), COD (Chemical Oxygen Demand) and the like), and has wide application prospect.

Description

1. Technical field [0001] The invention relates to a method for monitoring water quality pollution indicators and a water quality pollution indicator monitoring device using the method, which are used in the fields of water quality pollution monitoring and pollution treatment. 2. Background technology [0002] Changes in water pollution will seriously affect the growth and balance of aquatic organisms. Therefore, monitoring changes in water pollution indicators is very important and has been widely used in various fields such as environmental monitoring and production process pollution monitoring. However, due to the national standard method (GB11914-89 The COD test method in ) has problems such as long test time, complicated operation, need for pretreatment, secondary pollution of chemical reagents, etc., making rapid detection difficult. Using the ultraviolet absorption spectrum of the water body to measure can achieve the goal of accurately testing the water body pollutio...

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Problems solved by technology

[0002] Changes in water pollution will seriously affect the growth and balance of aquatic organisms. Therefore, monitoring changes in water pollution indicators is very important and has been widely used in various fields such as environmental monitoring and production process pollution monitoring. However, due to the national standard method (GB11914-89 The COD test method in ) has problems such as long test time, complicated operation, need for pretreatment, secondary pollution of chemical reagents, etc., making rapid detection difficult

Using the UV absorption spectrum of the water body to measure can achieve the goal of accurately testing water body pollution indicators, but the traditional UV detection device is bulky and difficult to achieve multi-point online monitoring

Existing on-line monitoring instruments usually use a single wavelength (usually the 254nm wavelength of a low-pressure mercury lamp) detection method, and the disadvantage is that some organic compounds do not absorb at 254nm, which makes the detection data deviate from the actual data. Therefore, , it is particularly important to realize online rapid and accurate monitoring of water pollution.

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