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Photoelectric detector

A photoelectric detection and signal detection technology, applied in measuring devices, special recording/indicating devices, instruments, etc., can solve the problem of large background light interference factors, and achieve the effects of easy identification and processing, good display effect, and easy observation.

Inactive Publication Date: 2015-04-08
ANHUI DANFENG ELECTRONICS MATERIAL
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Problems solved by technology

[0002] Photoelectric detection is to convert optical signals into electrical signals for easy analysis and processing. Photoelectric detection devices, such as PD, PMT, APD, etc., are used to convert optical signals into electrical signals. The authorized announcement number is CN201020505309.3. The load is replaceable. According to the detection requirements, one of the visible light camera, infrared thermal imager or ultraviolet imager is used. The camera is installed on the stable platform on the machine. However, because the output current through the photosensitive device is very low, it is easily affected by external electromagnetic waves. Signal interference; since the change of light intensity is much weaker than the change of background light, the interference factor of background light is very large

Method used

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Embodiment Construction

[0012] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. like figure 1 Shown: a kind of photoelectric detection device, the voltage that the photoelectric detection device needs to provide is 5V, as figure 2 As shown, it includes a signal detection circuit, the signal detection circuit is connected with a photon detector and a thermal detector, the signal detection circuit is connected with an optical signal conversion level circuit and a thermocouple temperature sensor, and the optical signal conversion level circuit and the thermocouple temperature sensor are connected with a signal amplification circuit, the signal amplification circuit is connected with a waveform shaping circuit, and the waveform shaping circuit is connected with a single chip microcomputer, the signal is received by the photon detector and the thermal detector, and the signal is processed by the photoelectric detection...

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Abstract

The invention discloses a photoelectric detector and relates to the technical field of photoelectricity. The photoelectric detector requires 3.3V voltage and comprises a signal detection circuit, the signal detection circuit is connected with a light-emitting diode, a photosensitive diode and a signal amplification circuit, and the signal amplification circuit is connected with a waveform shaping circuit which is connected with a single chip microcomputer. Light emitted by the light-emitting diode is transmitted through fingers to be absorbed and attenuated by blood finger tissues and then received by the photosensitive diode, and signals are acquired by a pulse signal pick-up circuit, amplified by the amplification circuit, processed by the waveform shaping circuit and finally displayed by the single chip microcomputer. Therefore, the problem that feeble signals are easily interfered by external electromagnetic signals is solved, and the influence of background light is eliminated.

Description

technical field [0001] The invention relates to the field of photoelectric technology, in particular to a photoelectric detection device. Background technique [0002] Photoelectric detection is to convert optical signals into electrical signals for easy analysis and processing. Photoelectric detection devices, such as PD, PMT, APD, etc., are used to convert optical signals into electrical signals. The authorized announcement number is CN201020505309.3. The load is replaceable. According to the detection requirements, one of the visible light camera, infrared thermal imager or ultraviolet imager is used. The camera is installed on the stable platform on the machine. However, due to the low output current through the photosensitive device, it is easily affected by external electromagnetic waves. The interference of the signal; because the change of light intensity is much weaker than the change of background light, the interference factor of background light is very large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D3/036
Inventor 徐大治王新武张勇
Owner ANHUI DANFENG ELECTRONICS MATERIAL
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