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

A technology of LED light source and detection device, which is applied in the direction of light source, electric light source, lighting device, etc. It can solve the problems that the compatibility of computers is not as good as that of PLC, it is difficult to stabilize the light intensity, and it is not known whether the light intensity fluctuates. The effect of stable strength, good compatibility and easy control

Active Publication Date: 2010-09-29
EAST CHINA JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 lig

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Embodiment 1, a kind of LED light source stability detection device based on PLC control, including box body 1, silicon photoelectric sensor 2, conditioning circuit 3, power supply 4, A / D converter 5, connecting cable 6; D / A converter 7. PLC 8, seven-segment digital tube 9, drive circuit 10, LED light source 11, wherein: the silicon photoelectric sensor 2 is installed on the box body 1, the silicon photoelectric sensor 2 and the conditioning circuit 3 are connected by wires, and the conditioning circuit 3 and A / D converter 5 is connected, A / D converter 5 is connected with PLC 8 through connection cable 6, PLC 8 is connected with D / A converter 7 through connection cable 6, D / A converter 7 is connected with drive circuit 10, LED The light source 11 and the power supply 4 are connected to the driving circuit 10 respectively, and the PLC 8 is connected to the seven-segment digital tube 9 .

Embodiment 2

[0023] Embodiment 2, a kind of LED light source stability detection device based on PLC control, wherein: the core of driving circuit 10 is step-down current type LM3409PFET controller, is when the external DC input voltage is 24V, drives 4 LEDs, LED light source The maximum average current of (11) is 1A; connect the VIN input voltage interface (12) to the EN pin, VIN pin and CSP pin of the LM3409, connect it to the UVLO pin of the LM3409 in series, and connect the CIN1 capacitor (13) in series Ground, connect the CF capacitor (14) in series to the VCC pin of LM3409; the UVLO pin of LM3409 connects the RUV2 resistor (15) in series to ground; pin, the IADJ pin of LM3409 is connected in series with CF2 capacitor (18) and grounded; the COFF pin of LM3409 is connected in series with ROFF resistor (19) and then connected to +14V power supply VO (26), and the COFF pin of LM3409 is connected in series with COFF capacitor (20) Then connected to the GND pin of LM3409; the GND pin of LM...

Embodiment 3

[0024] Embodiment 3, a kind of LED light source stability detection device based on PLC control, wherein: it is made up of two parts: hardware system (such as figure 1 ) and software systems.

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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...

Claims

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Application Information

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IPC IPC(8): G01M11/02G09G3/14H05B37/02
CPCY02B20/42Y02B20/40
Inventor 龚志远刘伟刘燕德高荣杰刘涛孙旭东
Owner EAST CHINA JIAOTONG UNIVERSITY
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