Engineers are using a variety of techniques to increase the intelligence of the car and to ensure the safety of the driver. Laser technology, radar technology, dedicated WiFi technology, and advanced image recognition technology are all mature technologies that can be applied to automobiles. Even so, the application of these technologies to cars is not only complicated but also costly.
Intel's researcher Richard Roberts came up with another technology solution that could use the visible light from LED lights to build a low-cost car mesh network that many cars with LED headlights can use. A network; in fact, this network has a good foundation.
Since 2008, Intel has long been known as the "visible light communication" technology, but until recently, the research and development of the technology has been in an unimportant position. Richard Roberts believes that this technology has the potential to become a communication platform between cars, hoping to attract people's attention. According to Richard Robert and colleagues, the "visible light communication" technology uses a series of LED light-visible flashing signals to communicate information between vehicles.
When the signal is transmitted, the flashing time of the LED light is very short, and the human eye does not feel the change of the light, but can transmit information such as the traffic condition of the road, the position of the car, the possibility of collision, and the like to other vehicles, and can be automatically An integral part of the driving system (if equipped with an automatic driving system).
When LED lights are used to transfer information between cars, the data rate of the LED light transmission signal is very slow for a conventional car camera, and the car camera can receive all the information. It can be seen that a car that has been equipped with LED lights can easily transmit signals. Having said that, the efficiency of "visible light communication" can be improved a lot if special equipment is installed. Compared with the on-board radar installed in the new car, the cost of the "visible light communication" special equipment is much lower.
There is no doubt that in-vehicle radar equipment and laser radar equipment are the best in-vehicle equipment to detect around the car, but at a higher cost, it is necessary to build a radar- or lidar-based network, unless the radar or laser is installed on the road. The proportion of radar equipment reaches 10%, otherwise the car manufacturers can not make a profit. Researchers estimate that the current ratio of car-mounted radar or vehicle-mounted lidar is still very low, and it is impossible to gradually develop a basic communication network.
"Visible Light Communication" also has some drawbacks: unlike on-board radar technology or wireless network technology, this technology relies on visible light to transmit signals. When "visible light communication" is used in the field, its reliability is not good. In strong sunlight, the sun will completely block the light from the LED lights; in harsh weather conditions, such as in fog or snow, the "visible light communication" system is not efficient.
Although the "visible light communication" technology is not efficient in transmitting information under certain conditions, it works very well under other specific conditions. For example, if a large number of cars are equipped with on-board radar, the vehicle-mounted radar will be sent around the vehicle. Signals, which will result in a large amount of signal noise, are compared to cars that use "visible light communication" to pass signals to nearby cars.
From the perspective of autonomous driving technology, the reliability of "visible light communication" is not high, but "visible light communication" is completely feasible as an additional safety device for autonomous vehicles in the future. Richard Robert is developing a set of American Institute of Electrical and Electronics Engineers standards for "visible light communication" to guide the development of future "visible light communication" automotive equipment. In terms of short-term effects, “visible light communication†can improve the safety of our cars before the emergence of fully-automated vehicles.
Intel's researcher Richard Roberts came up with another technology solution that could use the visible light from LED lights to build a low-cost car mesh network that many cars with LED headlights can use. A network; in fact, this network has a good foundation.
Since 2008, Intel has long been known as the "visible light communication" technology, but until recently, the research and development of the technology has been in an unimportant position. Richard Roberts believes that this technology has the potential to become a communication platform between cars, hoping to attract people's attention. According to Richard Robert and colleagues, the "visible light communication" technology uses a series of LED light-visible flashing signals to communicate information between vehicles.
When the signal is transmitted, the flashing time of the LED light is very short, and the human eye does not feel the change of the light, but can transmit information such as the traffic condition of the road, the position of the car, the possibility of collision, and the like to other vehicles, and can be automatically An integral part of the driving system (if equipped with an automatic driving system).
When LED lights are used to transfer information between cars, the data rate of the LED light transmission signal is very slow for a conventional car camera, and the car camera can receive all the information. It can be seen that a car that has been equipped with LED lights can easily transmit signals. Having said that, the efficiency of "visible light communication" can be improved a lot if special equipment is installed. Compared with the on-board radar installed in the new car, the cost of the "visible light communication" special equipment is much lower.
There is no doubt that in-vehicle radar equipment and laser radar equipment are the best in-vehicle equipment to detect around the car, but at a higher cost, it is necessary to build a radar- or lidar-based network, unless the radar or laser is installed on the road. The proportion of radar equipment reaches 10%, otherwise the car manufacturers can not make a profit. Researchers estimate that the current ratio of car-mounted radar or vehicle-mounted lidar is still very low, and it is impossible to gradually develop a basic communication network.
"Visible Light Communication" also has some drawbacks: unlike on-board radar technology or wireless network technology, this technology relies on visible light to transmit signals. When "visible light communication" is used in the field, its reliability is not good. In strong sunlight, the sun will completely block the light from the LED lights; in harsh weather conditions, such as in fog or snow, the "visible light communication" system is not efficient.
Although the "visible light communication" technology is not efficient in transmitting information under certain conditions, it works very well under other specific conditions. For example, if a large number of cars are equipped with on-board radar, the vehicle-mounted radar will be sent around the vehicle. Signals, which will result in a large amount of signal noise, are compared to cars that use "visible light communication" to pass signals to nearby cars.
From the perspective of autonomous driving technology, the reliability of "visible light communication" is not high, but "visible light communication" is completely feasible as an additional safety device for autonomous vehicles in the future. Richard Robert is developing a set of American Institute of Electrical and Electronics Engineers standards for "visible light communication" to guide the development of future "visible light communication" automotive equipment. In terms of short-term effects, “visible light communication†can improve the safety of our cars before the emergence of fully-automated vehicles.
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