The electrical characteristics of light sensors, what are the common types of photoelectric sensors

For general acoustic emission applications, the signal frequency band range is mostly between 25kHz and 750kHz, so resonant sensors are more suitable. Resonant narrowband sensors with a general broadband frequency of 150kHz are commonly used for metal materials and other applications; For acoustic emission signals such as corrosion and leakage, resonant sensors with a resonant frequency of 40kHz are commonly used; Due to the relatively low response sensitivity of wideband sensors in a wide frequency band, wideband sensors are selected for spectrum analysis. Qingcheng acoustic emission sensor is made of high-quality stainless steel material, and the overall shielding design can effectively reduce interference; It is suitable for bridge wire fracture monitoring, valve pipeline leakage monitoring, tool wear monitoring, wind power equipment monitoring, rotating equipment acoustic emission monitoring, structural parts damage monitoring, storage tank floor acoustic emission monitoring.

Photoelectric sensors are sensors that use optoelectronic devices as conversion elements. It can be used to detect non-electric amounts that directly cause changes in the amount of light, such as light intensity, illuminance, radiation temperature measurement, gas composition analysis, etc.; It can also be used to detect other non-electric amounts that can be converted into changes in the amount of light, such as part diameter, surface roughness, strain, displacement, vibration, velocity, acceleration, and the identification of the shape and working state of the object. Photoelectric sensors are non-contact, fast responding, and reliable, so they are widely used in industrial automation devices and robots.

There are many aspects of use, the most common can be used in the production line to detect technology, you can consult the sales staff of Wuxi Yuxuan Electronics!

Photoelectric switch is to use the measured object to block or reflect the light beam, and the circuit is selected by the synchronous circuit to detect the existence of the blocked object. All objects that reflect light can be detected. The photoelectric switch converts the input current into a light signal on the transmitter and emits it.

The receiver will then detect the target object based on the intensity or presence of the received light. Most photoelectric switches use infrared light, which has a wavelength close to that of visible light. Photoelectric switch manufacturers said that different standards and classification methods are used in the classification of various photoelectric switches, representing different attribute categories, and there are some classification methods between them that are cross-related, and photoelectric switches will not be able to be selected at multiple levels through the simplification of a classification method and the integration and utilization of needs.

1.Classification according to detection methods One is the light amount method, most of the photoelectric switches are used to detect whether the object is the amount of light, both by the light source by the object shading or reflection, radiation and shadow caused by the change of the amount of light to detect whether the object has it. In addition, photoelectric switch manufacturers have also introduced the triangulation ranging method, and the amount of light is easily affected by the flatness and roughness of the surface of the object and the color, so the distance method is required to be detected in some occasions with high requirements.

The laser measurement method is to emit an optical signal from the laser to the target, and then accept the reflected light signal from the target. 2.Classification of light source type Photoelectric switch manufacturers said that most of the current light sources use light-emitting diodes, and according to different purposes, incandescent lamps (visible light) need white light sign detectors, due to the service life and seismic performance are relatively small.

Light-emitting diode (LED) type (visible light and near-infrared light) is easy to modulate, long life, small size, low consumption, the advantage of ** is the ideal light source photoelectric switch, photoelectric switch manufacturers say can be used for various purposes, fluorescence type (visible light) is mainly used in photoelectric systems need length (image sensor, etc.), ultraviolet (invisible) through ultraviolet irradiation to detect objects visible light (fluorescence finishing defects, foreign bodies in food, etc.). The gas laser (visible light) beam is relatively strong, and it is used in flaw detection systems and barcode systems and strong light attenuation occasions, and the stable operation of photoelectric switch manufacturers such as steam, flame and other occasions. Photoelectric switch manufacturers have also corrected some people's mistakes, some people think that the purchase of photoelectric switches only need to choose the best products, but in fact, due to the difference in its space environment adaptation, the first product will not be able to fully guarantee the applicability, so want to pass the basic principle of the photoelectric switch, the structure of the components and the arbitrary selection of the working range, after the installation will be determined by tracking and measuring the photoelectric switch state.

1. A photoelectric sensor is a device that detects the distance and presence of an object by using an optical emitter (usually an infrared emitter) and an optoelectronic receiver. Photoelectric sensors are widely used in industrial manufacturing. There are three common types of photoelectric sensors:

Counter type (transmissive), reflective type, and close-range detection type (diffuse reflective type).

2. What are the types of sensors?

1) Laser, a measuring device that uses laser technology. It consists of a laser, a laser detector, and a measurement circuit. It is a new type of measuring instrument, which has the advantage of being able to achieve non-contact remote measurement, and has the advantages of speed, high precision, strong anti-light and anti-interference ability.

2) Resistive type, which is a device that converts measured physical quantities such as displacement, deformation, force, acceleration, humidity, temperature, etc. into resistance values.