LED light source stability detector based on PLC control and detection method thereof

Abstract

The invention relates to an LED light source stability detector based on PLC control, which comprises a box body, a silicon photoelectric sensor, a conditioning circuit, a power source, an A / D converter, a connecting cable, a D / A converter, a PLC, seven segments of nixie tubes, a driving circuit and an LED light source, wherein the silicon photoelectric sensor is arranged on the box body, the silicon photoelectric sensor is connected with the conditioning circuit via conductors, the conditioning circuit is connected with the A / D converter, the electric current of the LED is regulated via detecting and analyzing the change of illumination intensity so as to realize the stability of illumination intensity, and the effectiveness of the experimental result is intuitively analyzed and judged and can be directly fed back and controlled via saving and displaying the experimental result. The invention can display the intensity change of the light source in a graphical form, and carries out real-time operation according to the change of illumination intensity, and the device has simple structure and is easy to control.

Description

technical field [0001] The invention relates to an LED light source stability detection device and a detection method thereof, in particular to a PLC-based LED control light source stability detection device and a detection method thereof. Background technique [0002] With the continuous development of optical devices and control technology, the proportion of optical analysis and application in opto-mechanical integration is getting higher and higher. In spectral experiments, the stability of the light source is a very important factor. Because LED light sources can emit monochromatic light with narrow light waves, and have the advantages of small size, long life, use of direct current, and low calorific value, they are more and more used in spectral detection. Due to the unstable power supply or the defect of the light source itself, the LED light intensity fluctuates, and the slight fluctuation is difficult to detect with the naked eye, and the application will affect th...

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Problems solved by technology

[0003] Domestic patent No.200620069695.X realizes the adjustment of light directly through the feedback circuit. Since there is no signal conversion and display, it cannot directly reflect the adjustment effect, and it is not known whether the light intensity fluctuates. No.200710177356.2 is through wireless The way of automatic networking controls the lighting state according to the actual light intensity conditions of the application site, but it is mainly used in street lighting conditions, and the accuracy of the stabilization effect is not high

No.200710024056.0 converts the change of external natural light into electrical signals, and controls the opening and closing of lighting devices after processing by a microprocessor. It is a kind of switch control, and it is difficult to achieve stable light intensity.

It is also reported that some light source stabilizing devices use a single-chip microcomputer as the control core or directly control the light source with a feedback circuit. Although the cost of the single-chip microcomputer is relatively low, because the compatibility with the computer is not as good as PLC, it is inconvenient to perform various real-time tests on the detected light source. Control, but there is no PLC optical flow stabilization and detection device for plant factories or control requirements with complex and high stability

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