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Bosch introducing new mid-range radar sensor, stereo-video sensor in 2014

30 October 2012

As part of its work on developing new safety and driver assistance systems, Bosch will introduce a new mid-range 77 GHz radar sensor for front- and rear-end applications and a new stereo-video sensor.

77 Ghz radar. A leading European automaker is slated to deploy the new Bosch MRR rear mid-range radar sensor, which can precisely locate vehicles in blind spots or approaching from behind, in 2014. Compared to current 24-gigahertz solutions, this sensor is much more precise, with up to three times the ability to distinguish between objects and up to five times more accurate measurement of speed and distances, Bosch says.

With a range of up to 100 meters and an aperture angle of up to 150 degrees, the sensor is able to detect dangerous situations in the area to the rear of the vehicle at an early stage. Its exceptional distance resolution and accurate speed measurement ensure the driver knows exactly what is going on.

—Gerhard Steiger, the president of the Bosch Chassis Systems Control division

Two sensors, hidden one each to the left and right in the vehicle’s rear bumper, monitor the area beside and behind the vehicle. If another car is in the blind spot or is approaching at speed from behind, a lane-change assistant can warn the driver in time. Reversing out of a parking space no longer poses a problem, even when the driver’s view is blocked by obstacles. The MRR rear reliably warns of any approaching vehicles.

Based on the expertise Bosch has accumulated over three generations of radar design, MMR rear allows the automaker to integrate a wide range of safety and convenience functions. The technical basis for this is provided by bistatic frequency-modulated continuous-wave (FMCW) radar with four receiver channels.

Its higher operating frequency, wider modulation bandwidth, and four receiver channels make the quality of its continuous positioning far superior to standard 24-gigahertz systems.

The relative speed and distance of another vehicle is measured using the Doppler effect—the frequency shift between the emitted and received signal—and the time difference between the two signals. The vehicle’s current position can be determined by comparing the reflected signals picked up by the four discretely positioned receiver antennas.

The silicon-germanium technology used in the integrated high-frequency circuits does without moving parts. With a compact design that makes use of space-saving planar arrays, the system is easy to integrate into a vehicle’s body, for example hidden behind the bumper.

The front-end version of MRR, which was developed in parallel, has an even greater range of up to 160 meters, with an aperture angle of up to 45 degrees. On the basis of just one sensor, an emergency braking system working in conjunction with the ESP electronic stability program can take action to avoid or reduce the severity of an accident. Its data can also be fed into the ACC adaptive cruise control.

This function automatically brakes and accelerates to maintain a predetermined distance from the vehicle in front, and can tell drivers how far away they are from the vehicle in front.

Stereo-video sensor. Bosch engineers have succeeded in using a new stereo video camera to give driver assistance systems the capability of “seeing” in binocular vision—a capacity that enables the calculation of object sizes and distances and perceive longitudinal motion.

Stereo technology opens up new potential for video-based safety systems. A mono video camera requires extensive training before it can distinguish between different types of objects, such as pedestrians and cars, in its image field. In contrast, a stereo video camera can measure and detect all the obstacles based only on their movement and distance.

—Gerhard Steiger

Endowed with binocular vision, the sensor can measure distances to other objects using the video signal alone. On the basis of this, Bosch is developing functions that can independently take evasive action or steer the vehicle through a construction site. These will work in conjunction with existing assistance functions such as ACC adaptive cruise control and automatic emergency braking.

The new Bosch video camera supplies data for many different tasks. The information it provides can reduce both the risk and the consequences of collisions with vehicles, pedestrians, and cyclists at speeds of up to 80 km/h (50 mph).

As a result, the stereo camera data alone can be used to trigger an automatic emergency braking process. If an accident cannot be prevented, the speed of impact and thus the severity of the accident can at least be minimized—and by priming the passenger restraint system, airbags and seat belt pretensioners can be deployed in the optimum way.

The stereo system can of perform all the tasks typically associated with a mono video camera, such as recognizing traffic signs, helping drivers to stay in their lane, and automatically adjusting a vehicle’s headlights to take account of vehicles in front and oncoming traffic.

By integrating the control unit for image processing and function control directly in the camera housing, the Bosch engineers have created a compact system. With a 12-centimeter baseline distance—the distance between the optical axes of the lenses—the Bosch stereo camera may well be the smallest system of its kind currently available in the field of automotive solutions, the company sugests. As a result, it is easier for automobile manufacturers to integrate into their vehicles.

Each of the two CMOS (complementary metal oxide semiconductor) image sensors has a resolution of 1.2 megapixels. With its high-quality lens system, the camera is able to capture an angle of view of 25 degrees vertically and ±25 degrees horizontally, and offers a 3D measurement range in excess of 50 meters. The highly light-sensitive image sensors are capable of processing very high contrasts and cover the full spectrum of light visible to the human eye.

October 30, 2012 in Autonomous driving, Driver Assistance Systems, Sensors, Vehicle Systems | Permalink | Comments (7) | TrackBack (0)

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Comments

"Its exceptional distance resolution and accurate speed measurement ensure the driver knows exactly what is going on."

...ensure the car knows exactly what is going on...

Should we start a sweepstake for best guess as to year of introduction of the first self-driving car available to buy?

Human resistance to change could delay the arrival of autonomous cars by 2 or 3 decades. However, all the technology required will be there by 2020 or so.

Minor changes (and standardization) to road markings may be required? Improved GPS (with appropriate augmentation) could also help to guide the car from A to Z.

Aiming for 2014...

"The first tangible result of this research will be Volvo’s traffic jam assistance system, which will allow future Volvos to automatically follow the vehicle in front of them at speeds up to 50 km/h (31 mph)."

If Volvo starts selling cars that drive themselves at slower speeds in 2014 I suspect that we'll see fully self-driving cars before 2020. The technology is already developed. Google cars had accumulated over 300,000 miles without an accident. Regular roads, no special markings, GPS does things like determine the speed limit and route.

Like any other new technology, some will be early adopters and some will refuse to switch over. I recently listened to an interview with a famous author who had gone back to writing with pen because he could no longer find parts to fix his typewriter.

No doubt self-driving systems will come with an off switch.

No doubt self-driving systems will come with an off switch.

Let's hope so.

Self-driving cars are a great idea, and I can imagine many situations where I would like to have one. But I can also imagine many situations where I would not want one, so I will want to be able to deactivate the system at those times.

The adoption of answering machines was slowed by the callers but pushed by the "answerers" (I know; same people) and succeeded with little delay as we overcame the baseless irritation on having to suddenly improvise a message.

I don't think there is any reason to try and feel superior to the masses - autonomous cars, much like GPS, will arrive and be embraced as soon they can safely do the job

- probably WITH off switches, at least until an unpredictable human driver would be an unacceptable hazard.

" at least until an unpredictable human driver would be an unacceptable hazard"

Built in breathalyzer prevents inebriated driver from taking control.

Driver lockout while driver is texting....

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