The hottest sensor to help blind people drive in t

2022-08-18
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Sensors to help blind people drive in the future is not a dream

one day in the future, when you walk out of the door, you will see a dazzling future traffic scene: all kinds of roads hover in the sky, and all kinds of cars fly among them. Whether blind people, the elderly, or children can realize their dream of driving. Is this a scene that can only appear in movies

maybe you don't have enough patience to wait for this future, but it's likely that you will see blind people driving on the road in a few years

according to Xinhua on July 5, the American Federation of the blind and Virginia Tech plan to show the world a modified car next year, equipped with new technologies that are expected to help blind people drive independently

some people say that this is a fantasy, while others say that this great idea is comparable to landing on the moon

close contact

new technology has eyes and brain

blind car, as the name suggests, refers to a vehicle driven by people with visual impairment, which can directly help people with visual impairment drive freely in a completely enclosed environment blind car

in 2007, the U.S. Department of defense funded an auto driving competition. A car developed by Virginia Tech that does not need driver control and moves forward completely by feeling devices performed well. The special vehicle for the blind extends from this

the non visual interface of the special vehicle for the blind developed by Virginia Tech includes two interfaces

an interface is the eye and brain: the driver's handle, which is composed of laser sensors and several cameras, bears the heavy responsibility of the eye, and its task is to record the road conditions; The head is a specially made vibrating vest, which receives information from the eyes, judges and prompts the driver whether to accelerate, slow down or turn through different tremors. If you don't want to wear a vest, you can also wear similar vibrating gloves. These gloves are equipped with vibrators near the knuckles

in addition, there is a voice control software system to convey turning instructions. The steering wheel of the car is connected with a laser ranging instrument that can remotely monitor and collect information, and uses voice software to tell the driver how far it still needs to turn the steering wheel to turn the corner. For example, when you need to turn left, the ranging instrument will make three beeps. In addition, the vibration vest equipped for the driver will tell the driver when to accelerate and decelerate. The vest will vibrate on the back, abdomen and shoulders to convey different commands. When the whole vest is shaking, it means that the driver needs to brake quickly

another interface is called air image, which is a half sheet of paper board with many pores. This device releases compressed air to form a distribution map of objects around the car, telling the driver whether there is a car or whether there are obstacles on the road

background

extension of driverless

for this new technology, Yang Ming, an associate professor of automation at the school of telecommunications, Shanghai Jiaotong University, said: blind cars are a special application of driverless vehicles. The basic principle and core technology proposed in the requirements are basically the same as those of driverless vehicles

at present, urban traffic is closely related to people's lives. The emergence of more and more private cars also brings many problems, such as traffic congestion, energy tension, environmental pollution and so on. The safety (traffic accidents) and system efficiency (traffic congestion) of traditional vehicles need to be fundamentally solved. The way is to invite people out of the car, so that the car can perceive the obstacles on the road and avoid the danger

Professor Yang continued: in fact, the blind car made by Virginia Tech University in the United States is based on the driverless vehicle they developed before, and added some auxiliary control systems on it: Zhongchuang microcomputer shows the human-computer interaction equipment to help the blind. Except for human-computer interaction technology, all key technologies are the same, such as positioning technology, control technology, obstacle avoidance technology, etc

key technology

radar sensor communication system

safety is the key to the success or failure of driverless vehicles. At present, commonly used obstacle avoidance sensors include laser radar, microwave radar, ultrasonic sensor, etc. In the expressway environment, microwave radar with large detection distance is usually used because of its high speed; In the urban environment, due to the complex environment, the laser radar with large detection angle is usually selected. Due to the different properties of different radars, the selection and placement positions are also different. Professor Yang explained

in the 2007 auto driving competition, a car developed by Virginia Tech that does not need driver control and moves forward completely by feeling devices is equipped with laser sensors

however, as a new public transport system (car coupling), driverless vehicles also need some other related technologies, such as communication system, which is used to ensure the communication between vehicles and central control system, as well as the communication between vehicles. It is believed that the blind car also needs these basic key technologies with higher strength and lighter weight, which are the same as driverless technology. Professor Yang said

outlook

how far is the future of blind driving

blind cars are developed and produced for a special group of people, and can only meet the needs of a small number of people. Professor Yang said

moreover, there are still a series of problems to be solved for the blind driving: the first is the legal problem. Although the blind car has advanced technology that can remind the blind to avoid obstacles in the road, how to pay if there is an accident

secondly, from a technical point of view, environmental awareness technology is still the focus of driverless research, and the same is true for blind driving

in addition, with the growth of the number of blind cars, the coordination between cars, communication system and remote monitoring are also important issues

finally, there are car insurance and today's attitude towards blind people driving cars

extend

benefits brought by the research on blind driving

blind cars can make some people who lose their brightness enjoy the same pleasure of driving as normal people, which has certain social significance. Professor Yang believes that the significance of intelligent transportation is more than that. In a big way, the vast majority of traffic accidents are caused by human factors. The smart car will not drive tiredly, let alone violate the rules. In case of emergencies, it can always keep a clear head. No one is safer than others. The benefits of blind driving should be the same, which can greatly improve the efficiency and safety of the transportation system

for example, the laser sensor and several cameras on the blind driving car record the road conditions, and the vibrating vest and voice control software system remind ordinary drivers when to accelerate, slow down and turn through vibration and voice. In this way, drivers will be safer and more efficient

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