Multi-light source detection device and detection method

Abstract

The invention discloses a multi-light source detection device and method. The multi-light source detection device comprises a hollow fixed seat, wherein the fixed seat is provided with a detection cell. The multi-light source detection device is characterized in that the fixed seat is also provided with a light detector, a rotatable prism, and a plurality of light sources; light emitted by one light source is refracted by the prism, passes through the detection cell, and then is received by the light detector. With the multi-light source detection device, light rays emitted by the light sources at different positions are refracted by the prism, then are allowed to respectively pass through the detection cell from a same position and a same straight line through rotation of the prism, and finally irradiate onto the light detector. The prism is a triangular prism, and the central axis of a mounting seat is coincident with the central line of the light detector and is vertical to a central symmetrical plane of the prism. The multi-light source detection device has the advantage of less reagent consumption, moreover, can realize multi-parameter detection, and achieves multi-parameter detection with a single instrument.

Description

[0001] technical field [0002] The invention relates to an optical detection device, in particular to an optical detection device for fluid detection and a detection method thereof. Background technique [0003] In the current water quality detection technology in the market, usually a detection pool is equipped with only one light source and one light detector. Different substances in the fluid absorb light of different wavelengths differently, so the method to detect this substance is to use the detection light that it absorbs most easily to walk a certain distance (that is, the optical path) in the detection cell, and pass the detection by measuring from the other end. The specific detection light intensity of the pool is used to calculate the consumption of the light intensity by the fluid in the detection pool (that is, the light loss), and then the concentration of this substance in the fluid in the detection pool is calculated. A detection cell is equipped with a li...

AI Technical Summary

Problems solved by technology

But its disadvantage is that multiple light sources are realized by controlling the motor through the program and then controlling the runner to make precise rotation. Not only must the rotation angle of the runner be accurately controlled, but also the location of each light source needs to be accurately remembered, and the software program is complicated. , and with the use of mechanical wear, the control of the angle of rotation will inevitably decrease, causing the measurement error of the instrument to increase continuously

Because different parameters have different absorption capabilities for different wavelengths of light, but the wavelength range of the light emitted by the light source is a normal distribution, and the peak also has an error range, so a large part of the light received by the photodetector is the substance that is not easy to be detected. absorbed light

This also increases the detection accuracy requirements of the photodetector and the wavelength accuracy requirements of the light source.

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