Five common applications of laser sensor

With the development of laser technology, laser sensor has become a new type of sensor. It is a sensor that uses laser technology to measure. It consists of laser, laser detector and measuring circuit. Laser sensor is a new type of measuring instrument, which has the advantages of non-contact remote measurement, high speed, high precision, large measuring range, strong electrical interference ability, etc., and has a wide range of applications in many industrial fields.

1. Test and measurement
Using the characteristics of laser, such as high directivity, high monochromaticity and high brightness, it can realize non-contact long-distance measurement. Laser sensors are often used for measuring physical quantities such as length, distance, vibration, orientation, etc., and can also be used for flaw detection and monitoring of air pollutants, etc.

2. Speed measurement.
Laser velocimetry is a kind of laser velocimetry based on kidople's principle. Laser Doppler velocimeter is widely used. It can measure the wind tunnel velocity, rocket fuel velocity, aircraft jet velocity, air velocity, particle size and convergence velocity in chemical reaction, etc.

3. Vehicle width height over limit detection
The laser sensor is used for rapid measurement. The PC industrial computer and the network kernel of visual programming software VB are used for real-time data transmission and processing with the sensor. At the same time, the upper computer control software with friendly interface is designed. The field test data show that the system has good real-time performance and high measurement accuracy, and has a certain practical value.

4. Unmanned vehicle
For example, the second generation of Google's driverless car is equipped with laser sensors. The laser sensors on the top are still quite obvious, and the other sensors are very hidden. The front, rear and both sides of the vehicle are clearly marked with Google's driverless car logo. The driving control principle of Google's driverless car is to continuously collect all kinds of accurate data of the car itself and its surroundings through many sensors installed around the car, analyze and calculate through the processor in the car, and then control the car's driving according to the calculation results.

5. Automobile anti-collision detector
Most of the existing laser ranging sensors of the vehicle collision prevention system use the laser beam to identify the distance between the target vehicles in the front or rear situation in a non-contact way. When the distance between vehicles is less than the predetermined safety distance, the vehicle anti-collision system will brake the vehicle in an emergency, or give an alarm to the driver, or integrate the speed, distance and vehicle of the target vehicle. Braking distance, response time and other real-time judgments and responses to vehicle driving can greatly reduce traffic accidents.

The structure and principle of laser sensor is simple and reliable, with strong anti-interference ability, which is suitable for various harsh working environment and high resolution. In the future, it can play its own role in many fields.