Broadly speaking, RFID, ZigBee, wireless sensing networks, Micro Electro Mechanical Systems (MEMS), image sensing, sound waves, temperature sensing, etc. are all areas of sensing technology. As far as the application market is concerned, considering the factors such as human safety, driving and the environment inside the vehicle, the wide range of technologies used in vehicle sensing is said to be a great result of the collection of sensing technology.
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Safety is the mother of vehicle development, and sensing technology is the top student who is firmly in control of the safety of the new generation of vehicles. Since the invention of the automobile, land traffic accidents have increased. Although the automobile industry has been hailed as a closed and relatively traditional industry, various automobile manufacturers have not been working hard in the direction of safety and comfort for a long time. Electronic industry manufacturers are also aware of this trend, and propose many sensing technology solutions for vehicle safety and other related applications, making modern high-computerized vehicles a big step toward safety. Broadly speaking, RFID, ZigBee, wireless sensing networks, Micro Electro Mechanical Systems (MEMS), image sensing, sound waves, temperature sensing, etc. are all areas of sensing technology. As far as the application market is concerned, considering the factors such as human safety, driving and the environment inside the vehicle, the wide range of technologies used in vehicle sensing is said to be a great result of the collection of sensing technology.
Wireless sensing technology provides personalized service
Wireless sensing technology is widely used, providing a safe and personalized service to vehicle users due to different application areas. In the early days, wireless sensing applications used military applications as the bulk, and then began to flow to civilian applications, such as traffic engineering, mine monitoring, geographic detection, etc., and then moved to the smart home field. Today, the automotive field is also one of the applications of wireless sensing technology.
The wireless sensing technology in the automotive field involves personal safety, and the system requirements are much higher than the smart home wireless sensing system. For example, the sensitivity of the carbon dioxide concentration in the car is very important. If the concentration of oxygen is too high, it will affect the driving spirit, and it will lead to suffocation. For the above reasons, the sensitivity of the sensor is necessary to be improved. Once the concentration is too high, the signal conversion of the system is notified to inform the vehicle that the carbon dioxide concentration in the vehicle is too high, and the driver is prompted to open the window to allow air to circulate.
Anti-theft systems can also become smarter and more user-friendly through wireless sensing systems. In the past, the anti-theft system usually used the wireless transmitter on the owner's body, and the button could be pressed to unlock the anti-theft system. However, due to the advancement of ultra-low-power power management and RF process technology, the power consumption of wireless sensing is also greatly reduced. The owner can carry a wireless RF system, and at the same time control all the doors, the door is close to which door, the door will automatically open. The other doors remain unopened, full of intelligent anti-theft systems. At the same time, with the car control system, it can be matched with the owner's preferences, first playing music, air conditioning inside the car and adjusting the sitting space. Therefore, on the whole, wireless sensing technology is widely used, and it can provide safe and personalized services for users in the car due to different application fields.
MEMS Sensor is sensitive to the role of Wang to protect the car body safety
Thanks to the wireless sensing network, the protection of the safety of people in the car is still not enough. At this time, the MEMS system plays a key role in the body movement. The early industry did not pay attention to MEMS, until the iPhone and WII appeared in the rivers and lakes, MEMS was really carried forward.
However, MEMS has already used a lot of body movements. The main reason is that there is acceleration, climbing and encountering unequal movements during the movement of the car body. The MEMS Gyro scope instantly detects the movement of the car body and returns to the body control. The system further controls the body to avoid overturning caused by excessive tilting of the body or excessive slippage resulting in a runaway collision. Considering the safety of the people inside the car, the sensitivity of MEMS and the speed of response are relatively important. For example, one of the applications of MEMS, the accelerometer, can calculate the speed of the car's moving motion. In the event of a crash, the accelerometer immediately calculates the impact velocity and then the safety of the electronic control component. Airbags, decide whether to activate the airbag to protect the human body.
Xu Ruida, associate director of the technical department of Dunji Technology Pathway, pointed out that although MEMS is widely used, the rigor of the component operating environment is very different in terms of consumer and vehicle safety, for example, in temperature testing, general consumption. Or the temperature test of industrial electronic systems is about -20 ° C to 105 ° C, but in the automotive field temperature test, the test range must be pulled to about -50 ° C to 150 ° C The interval is expected to be more stable in the actual application environment. Similarly, in crash and shockproof, the MEMS system must also transmit signals stably under strong vibration conditions, so that other electronic systems of the car body can quickly respond to keep the car body stable and personal. Safety.
Image sensing plus infrared driving without worry
Image detection can be divided into driver's mental condition, driving distance and reversing detection. At present, the most widely used is reversing detection. Especially in Taiwan, the small people are thick, every household has a RV, how to park in a small space. It has become a big challenge. If you cooperate with the infrared function, it is even more powerful. By calculating the distance between the car and the obstacle through reflection, the driver can more clearly grasp how much safe parking space there is.
Considering the safety of driving, many providers of solutions for in-vehicle systems have begun to think about how to further prevent car accidents. Among them, the two major applications of the driver's mental state and driving distance are the most heated discussions in the industry. Through image detection, such as whether the eyes are looking straight ahead, whether the eyes are closed, the frequency of the head shaking, etc., to determine the driver's mental state and remind them. The system design usually captures images by a camera lens, performs signal conversion through an Analog-to-Digital Converter (ADC), and transmits the data to a DSP (Digital Signal Processor). As long as you burn a lot of dangerous action data of the driver in the DSP in advance, cooperate with the software driver to perform high-speed calculation, and then transfer the calculation result to other electronic systems, promptly remind the driver of the precautions and avoid accidents.
The same system design concept can also be applied to the detection of driving distance. The car manufacturer can consider the safety requirements, and arrange video cameras around the car body to quickly capture information on other vehicles and roads using moving objects, such as pedestrians, bicycle riders, etc., to conduct road motion detection in advance to remind the driver of the current The condition of the car dealership.
In general, sensing technology is not a technical concept that can be completed by a single electronic component, but a complete and operable electronic system. Its system components can include: signal receiving components, ADC, processor, FPGA and DAC (Digital- To- Analog Converter; digital analog converter) and power management components. Considering the safety electronics field of vehicles, due to the safety of the users involved in the car, the stability of the components themselves, collision resistance, operating temperature, reaction speed and accuracy are all important factors. The semiconductor component industry has introduced relevant certification specifications, such as IEC61508, AEC Q-100 and ISO/TS 16949:2002, to meet the needs of automotive system manufacturers.
Life safety is the most important and important requirement of people. In the real environment, vehicle safety is the most urgent problem to be solved. The high-tech products will eventually have to return to the market demand. The role of the industry is to provide solutions to solve problems and provide more security for people's lives.
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