Optical detection device and optical detection method

Abstract

The embodiment of the invention provides an optical detection device and an optical detection method. The optical detection device comprises a light-emitting device and a spectroscope, the light emitted by the light-emitting device is divided into at least two beams of light through the spectroscope; a first part of light in the at least two beams of light penetrates through a first medium and enters a first receiving end; a second part of light in the at least two beams of light penetrates through a second medium and enters a second receiving end; the second medium is an interval to be measured or an object to be measured, and the first medium is a fixed medium. The measuring device and the measuring method are high in adaptability and can be widely applied to different optical measuring systems.

Description

technical field [0001] The invention relates to the technical field of optical detection, in particular to an optical detection device and an optical detection method. Background technique [0002] Existing optical sensor detection schemes usually enhance the anti-interference ability through modulation and demodulation or filters, and sensor detection methods usually use threshold values ​​and fixed value look-up tables for detection. [0003] Example 1: Solution light transmittance detection sensor, the existing solution is a fixed wavelength detection light source, with a corresponding wavelength light detection sensor, and a corresponding drive circuit. The light source for this application often has a non-negligible light attenuation phenomenon , the current processing scheme is analog compensation, which cannot actually compensate for light attenuation, and cannot cope with such interference factors. At the same time, if the light intensity of the light source fluctua...

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Problems solved by technology

[0003] Example 1: Solution light transmittance detection sensor, the existing solution is a fixed wavelength detection light source, with a corresponding wavelength light detection sensor, and a corresponding drive circuit. The light source for this application often has a non-negligible light attenuation phenomenon , the current processing scheme is analog compensation, which cannot actually compensate for light attenuation, and cannot deal with such interference factors

At the same time, if the light intensity of the light source fluctuates irregularly, existing solutions cannot compensate for this interference

[0004] Example 2: Object counting. Existing schemes usually use light occlusion as the basis for judging the passing of objects, and use threshold values ​​or look-up tables to judge light-transmitting objects. This scheme is sensitive to ambient light, and the light decay and vibration of the light source are all will affect the measurement results

[0005] Existing optical detection schemes usually use the value monitored by the optical sensor as a characterization quantity to judge directly, which has poor anti-interference ability and is sensitive to the influence of errors such as light source light attenuation and ambient light.

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