Today we are talking about the application of laser sensors in life. Do you know where laser sensors are used? Laser technology has always been a relatively advanced technology in modern times, and the sensors that use laser technology to measure also instantly become taller! The difference from the general sensor is that it can realize non-contact long-distance measurement, and its application in this area is also very extensive.
The working principle of the laser sensor is that the laser emitting diode is aimed at the target to emit light pulses, and the laser is scattered in all directions after being reflected by the target. Part of the scattered light returns to the sensor receiver and is imaged on the avalanche photodiode after being received by the optical system. Avalanche photodiode is an optical sensor with internal amplification function, so it can detect extremely weak light signals and convert them into corresponding electrical signals.
Let's take a look at the application cases!
1. Highway toll station
The laser sensor adopts the time-of-flight (TOF) measurement principle, which can form 4 planes in the detection area to detect vehicles. At the same time, the product also has functions such as rear-end collision prevention and vehicle safety protection. Compared with traditional light curtains, laser sensors have the advantages of high sensitivity, high accuracy, easy installation, high cost performance, and strong stability.
2. Vehicle width and height over-limit detection
Using laser sensors for rapid measurement, using PC industrial computer and visual programming software VB network core and sensors for real-time data transmission and processing, and a friendly interface host computer control software is also designed. Field test data shows that the system has good real-time performance and high measurement accuracy, and has certain practical value.
3. Self-driving car
The driving principle of the unmanned vehicle is to continuously collect various accurate data of the vehicle itself and the surroundings through many sensors installed around the vehicle, analyze and calculate it through the processor in the vehicle, and then control the driving of the vehicle based on the calculation results. Unmanned vehicles will use GPS equipment and sensors to accurately locate the vehicle's position and forward speed, and determine the surrounding pedestrians, vehicles, bicycles, signal lights and many other objects.
Laser sensor development prospects
The global sensor market capacity in 2008 was 50.6 billion U.S. dollars. Eastern Europe, Asia-Pacific and Canada became the fastest growing regions of the sensor market, while the United States, Germany, and Japan were still the regions with the largest sensor market distribution. The world's high-end sensor manufacturers such as Zhenshang have begun to enter mainland China and set up a technology development department. As far as the world is concerned, the fastest-growing sensor market is still the automotive market, and the process control market is the second largest. The communications market is optimistic.
Some sensor markets such as pressure sensors, temperature sensors, flow sensors, and level sensors have shown the characteristics of mature markets. Flow sensors, pressure sensors, and temperature sensors have the largest market sizes, accounting for 21%, 19%, and 14% of the entire sensor market, respectively. The main growth of the sensor market comes from emerging sensors such as wireless sensors, MEMS (Micro-Electro-Mechanical Systems) sensors, and biosensors. Among them, the compound annual growth rate of wireless sensors in 2007-2010 is expected to exceed 25%.
The global sensor market is showing a trend of rapid growth amid ever-changing innovations. Relevant experts pointed out that the main technologies in the sensor field will be extended and improved on the existing basis. Countries will compete to accelerate the development and industrialization of a new generation of sensors, and competition will become increasingly fierce. In the field of high-end technology sensors, Zhenshang and other international sensor giants have also entered the domestic market and have directly established a technology research and development department in China. The development of new technologies will redefine the future sensor market, such as the emergence of new sensors such as wireless sensors, optical fiber sensors, smart sensors, and metal oxide sensors and the expansion of market share.
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