Annie Tritt for The New York Times
Jesse Levinson of Stanford develops safety and self-driving systems like one on this Volkswagen Passat that detects obstacles.
PALO ALTO, Calif. — Driving around a college campus can be treacherous. Bikes and scooters zip out of nowhere, distracted students wander into traffic, and stopped cars and speed bumps suddenly appear. It takes a vigilant driver to avoid catastrophe.
Jesse Levinson does not much worry about this when he drives his prototype Volkswagen Passat around the Stanford University campus here. A computer vision system he helped design keeps an unblinking eye out for pedestrians and cyclists, and automatically slows and stops the car when they enter his path.
Someday soon, few drivers will have to worry about car crashes and collisions, whether on congested roads or on empty highways, technology companies and car manufacturers are betting. But even now, drivers are benefiting from a suite of safety systems, and many more are in development to transform driving from a manual task to something more akin to that of a conductor overseeing an orchestra.
An array of optical and radar sensors now monitor the surroundings of a growing number of cars traveling the nation's highways, and in some cases even track the driver's physical state. Pedestrian detection systems, like the one that Dr. Levinson, a research scientist at Stanford's Center for Automotive Research, has helped design, are already available in luxury cars and are being built into some midrange models.
The systems offer auditory, visual and mechanical warnings if a collision is imminent — and increasingly, if needed, take evasive actions automatically. By the middle of this decade, under certain conditions, they will take over the task of driving completely at both high and low speeds.
But the new systems are poised to refashion the nature of driving fundamentally long before completely autonomous vehicles arrive.
"This is really a bridge," said Ragunathan Rajkumar, a computer science professor who is leading a Carnegie Mellon University automated driving research project partly financed by General Motors. "The driver is still in control. But if the driver is not doing the right thing, the technology takes over."
By Carnegie Mellon University
Carnegie Mellon's Autonomous Cadillac SRX can drive itself on public roads, detect and stop for pedestrians, and communicate with traffic signals--among other things--all while looking very normal.
Although drivers — at least for now — remain responsible for their vehicles, a host of related legal and insurance issues have already arisen, and researchers are opening a new line of study about how humans interact with the automatic systems.
What the changes will mean to the century-old American romance with the car remains to be seen. But the safety systems, the result of rapid advances in computer algorithms and the drastically falling cost of sensors, are a practical reaction to the modern reality of drivers who would rather talk on the phone and send text messages than concentrate on the road ahead and drive.
Four manufacturers — Volvo, BMW, Audi and Mercedes — have announced that as soon as this year they will begin offering models that will come with sensors and software to allow the car to drive itself in heavy traffic at speeds up to 37 miles per hour. The systems, known as Traffic Jam Assist, will follow the car ahead and automatically slow down and speed up as needed, handling both braking and steering.
At faster speeds, Cadillac's Super Cruise system is intended to automate freeway driving by keeping the car within a lane and adjusting speed to other traffic. The company has not said when it will add the system to its cars.
Already actions like steering, braking and accelerating are increasingly handled by computer software rather than the driver.
"People don't realize that when you step on antilock brakes it's simply a suggestion for the car to stop," said Clifford Nass, a director at the Center for Automotive Research at Stanford. How and when the car stops is left to the system.
The automobile industry has been motivated to innovate by growing evidence that existing technologies like the antilocking braking systems and electronic stability control have saved tens of thousands of lives.
In November, the National Transportation Safety Board recommended that all new cars be equipped with collision avoidance technologies, including adaptive cruise control and automatic braking. Two states — California and Nevada — have passed laws making it legal to operate self-driving cars as long as a human being is inside, able to take over.
The National Highway Traffic Safety Administration recently reported that one system, electronic stability control, or E.S.C., which digitally detects the loss of traction and compensates automatically, saved 2,202 lives from 2008 to 2010. Federal safety regulations began phasing in electronic stability control on small trucks and passenger vehicles in 2007.
This article has been revised to reflect the following correction:
Correction: January 14, 2013
An earlier version of this article, and a photo caption, misidentified the model of car that researchers at Stanford are working with. It is a Volkswagen Passat, not a Touareg or Passet. The article also referred incorrectly to one of the researchers on second reference. Jesse Levinson has a Ph.D., and should have been referred to as Dr. Levinson, not Mr. Levinson.
This article has been revised to reflect the following correction:
Correction: January 16, 2013
An article on Saturday about new technologies that are changing the way cars are driven misidentified the federal agency that recommended in November that all new cars be equipped with collision avoidance technologies. It is the National Transportation Safety Board, not the National Highway Traffic Safety Administration. And the article and an accompanying picture caption also misidentified the Volkswagen model that researchers at Stanford are working on. It is a Passat, not a Touareg.
Anda sedang membaca artikel tentang
Drivers With Hands Full Get a Backup: The Car
Dengan url
https://scienceteko.blogspot.com/2013/01/drivers-with-hands-full-get-backup-car_16.html
Anda boleh menyebar luaskannya atau mengcopy paste-nya
Drivers With Hands Full Get a Backup: The Car
namun jangan lupa untuk meletakkan link
Drivers With Hands Full Get a Backup: The Car
sebagai sumbernya
0 komentar:
Posting Komentar