Method for detecting light in specific wavelength range based on LEDs with different light-emitting wavelengths
A technology with a specific wavelength and emitting wavelength, applied in the field of photoelectric sensors, can solve the problems of complex structure, low response speed, and large area of light detection sensors, and achieve the effects of reducing cost, reducing interference and convenient use.
Pending Publication Date: 2020-10-30
CHENGDU VCARE QINYUAN HEALTH TECH
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[0006] The purpose of the present invention is to overcome the deficiencies of the prior art, provide a detection method for light in a specific wavelength range based on LEDs with different luminous wavelengths, and solve the problem of complex structure, large area, low response speed and high cost of existing light detection sensors. High disadvantage
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[0025] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.
[0026] In this example, if figure 1 As shown, the detection method of light in a specific wavelength range based on LEDs with different emission wavelengths, the method includes the following steps
[0027] In step 1, LED is used as the photosensitive device, and the photosensitive device is placed in a light environment to detect the intensity of detectable light. LED is a light-emitting diode capable of emitting different wavelengths, which can detect detectable light in a specific wavelength range and form a photocurrent. LEDs that emit light of different wavelengths respond differently to detectable light of different wavelengths. Therefore, using this feature, LEDs with different light colors can be used to detect light in...
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The invention discloses a method for detecting light in a specific wavelength range based on LEDs with different light-emitting wavelengths. The method comprises the following steps: employing the characteristic that different LEDs have different responses to different light bands, employing an LED as a light-sensitive device, placing the light-sensitive device in a corresponding illumination environment, and detecting the intensity of corresponding light; converting the photocurrent generated by a PN junction of the LED under illumination into a photosensitive voltage through a correspondingconversion circuit; and converting the output voltage according to a characterization relationship between the photosensitive voltage and the illumination intensity so as to obtain the intensity of the corresponding light detected by the light-sensitive device. According to the scheme, the LED with relatively low cost is adopted to detect light, so that the response speed is high, the interferenceof light with other components is greatly reduced, the cost of the sensor is greatly reduced, resources are saved, and the sensor is convenient to use.
Description
technical field [0001] The invention generally relates to the field of photoelectric sensors, and in particular to a method for detecting light in a specific wavelength range based on LEDs with different emission wavelengths. Background technique [0002] At present, there are many types of photoelectric detection sensors on the market, which can be roughly divided into three types. The first is CCD and CMOS, which are mostly used for image sensing and imaging analysis. The second is a photoresistor, which is made of a photosensitive material. When there is light, the resistance value changes to detect the light intensity. The third type is a relatively common photodiode, which adopts the form of a larger PN junction to excite photons to electrons to form photogenerated carriers for photoelectric detection. But compared with the photodetection device announced by the present invention, these products all have the following problems: [0003] 1) As far as CCD and CMOS are ...
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IPC IPC(8): G01J1/42
CPCG01J1/42
Inventor 崔予红
Owner CHENGDU VCARE QINYUAN HEALTH TECH