The semiconductor laser is focused by the mirror to the object to be measured. The reflected light is collected by the mirror and projected onto the CCD array; the signal processor calculates the position of the light spot on the array through trigonometric function to obtain the distance from the object.

The laser transmitter shoots the visible red laser to the surface of the object through the lens, and the laser reflected by the object passes through the receiver lens and is received by the internal CCD linear camera. According to different distances, the CCD linear camera can "see" this at different angles. light spot. From this angle, known as the distance between the laser and the camera, the digital signal processor can calculate the distance between the sensor and the object being measured.

At the same time, the beam is processed by analog and digital circuits at the position of the receiving element, and analyzed by the microprocessor to calculate the corresponding output value, and output the standard data signal proportionally within the analog window set by the user. If the switch output is used, it will be turned on within the set window and turned off outside the window. In addition, independent detection windows can be set for analog quantity and switch quantity output.

Measurement principle of laser echo analysis method

The laser displacement sensor adopts the principle of echo analysis to measure the distance and can achieve a certain degree of accuracy. The inside of the sensor is composed of a processor unit, an echo processing unit, a laser transmitter, and a laser receiver. The laser displacement sensor transmits one million pulses per second to the detected object through the laser transmitter and returns to the receiver. The processor calculates the time required for the laser pulse to meet the detected object and return to the receiver, thereby calculating the distance value, the output The value is the average output of thousands of measurements.