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Measuring Distance with Laser Sensor Technology

Update: 2019-08-10 16:57 Source: LUFTMY

Laser sensor technology is a kind of high speed and high precision detection application. Advanced laser sensors include rugged free-standing enclosures, precise laser emitters, linear imagers and user-configurable output characteristics.

The laser sensor does not require an external controller for adjustment. The operator is able to easily place the laser sensor in all locations, including inaccessible areas or harsh environments of the equipment, and make all necessary adjustments and configurations according to other applications.

Automatic laser power and measurement rate

Laser sensor distance measurement method:

One of the main components of the laser sensor is the linear imager, which is composed of hundreds or thousands of pixels in a row. The advanced laser sensor is based on the principle of optical triangulation and combines with the linear imager. The linear image is used to accurately measure the position of the object in front of the sensor. The laser transmitter aims the visible laser at the object under test through a lens. The laser also diffuses light from the surface of the subject, which is then focused by a receiver lens on the sensor, generating light and electricity on the linear imager.

Optical triangulation schematic diagram

The distance between the subject and the sensor determines the Angle at which the light passes through the receiving lens, which determines the position at which the received light will reach the linear imager. If the distance of the subject is close to the maximum specified range, the light will be directed to the end of the imager closest to the laser emitter. If the position of the object is close to the minimum specified range, the light will fall on the opposite end of the imager furthest away from the laser transmitter. The position of the light on the linear imager calibrates all effective target distances during operation. The received light is processed by analog and digital electronic devices and analyzed by a digital signal processor.

Advantages of laser sensor technology:

Laser sensor technology has many advantages over traditional mechanical measurement equipment, including non-contact measurement, small measurement area, high-speed data acquisition, solid state design and flexible operation. At the same time, laser sensors are mostly used in quality control, error prevention and positioning.

Non-contact measurement by laser sensor


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