Photoelectric sensor

Abstract

The invention discloses a photoelectric sensor, and relates to the technical field of sensors. The photoelectric sensor comprises a shell, wherein an internal framework is fixedly connected to the interior of the shell; one surface of the internal framework is fixedly connected with a brushless direct-current motor, and one end of an output shaft of the brushless direct-current motor is fixedly connected with a light reflection device; a battery bin is fixedly connected to one side surface of the internal framework; a laser emitting module is clamped on one surface of the internal framework; an infrared receiving tube is fixedly connected to one surface of the internal framework; an A / D conversion chip is fixedly connected to one surface of the internal framework; and one end of the A / D conversion chip is fixedly connected with an operational amplifier chip. By virtue of mutual matching of the laser emitting module and a rotary lens, the sensor can emit a high-frequency light beam to measure a vibration sound source; and light can be transmitted in the a vacuum state, so that the sensor can still effectively collect sound information under a condition that a microphone is interfered by vacuum laminated glass, and therefore, the sensor has the advantage of resisting interference of sound insulation glass.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a photoelectric sensor. Background technique [0002] A photoelectric sensor is a sensor that uses a photoelectric element as a detection element. It first converts the measured changes into changes in optical signals, and then further converts the optical signals into electrical signals with the help of photoelectric elements. Photoelectric sensors are generally composed of three parts: light source, optical pathway and photoelectric elements. The photoelectric detection method has the advantages of high precision, fast response, non-contact, etc., and has many measurable parameters. The structure of the sensor is simple and the form is flexible and diverse. Therefore, photoelectric sensors It is widely used in detection and control. [0003] However, the photoelectric sensor at the present stage does not have an acoustic field. The existing sound collection device is mainly a...

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Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a photoelectric sensor, through the mutual cooperation of the laser emitting module and the rotating lens, the sensor can emit high-frequency light beams to measure the vibration sound source, and decode the measured optical signal into sound waves The signal can effectively collect human voice information through the light beam, because light can propagate in a vacuum, so that the sensor can still effectively collect sound information when the microphone is interfered by the vacuum laminated glass, which solves the problem that the microphone is blocked by the soundproof glass The problem of not being able to collect sound information

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