Bosch introduces new semiconductor chip for improved navigation
Bosch has released a new MEMS sensor, the SMI230, to constantly register changes in the vehicle’s direction and speed, evaluate the information, and transmit it to the navigation system. There, the information is combined with the positional data from the global navigation satellite system (GNSS) and used for navigation. A sudden interruption in the GPS signal—due to a tunnel or urban canyon—causes the new sensor to step in.
“When the navigation system is at a loss, Bosch semiconductor sensors ensure that the car doesn’t lose its way,” said Jens Fabrowsky, Member of the Executive Management of Bosch’s Automotive Electronics Division.
The company recently started production of the SMI230, and the first customers are already receiving the sensor as standard equipment.
To generate high-precision data on vehicle motion, the company puts together two of the sensors—one for the vehicle’s acceleration, the other for its yaw rate—in a single housing. The sensor pairing aids in a higher degree of precision and can quickly detect changes in the vehicle’s motion.
Data from the SMI230 sensor helps the map display moves smoothly in tandem with the vehicle’s motion. The same applies to a situation in which the navigation system completely loses its orientation due to a dropped satellite signal.
“Bosch’s sensor resolves the blind spots of GNSS navigation,” said Michael Rupp, Product Manager in Automotive Electronics at Bosch. “It helps to precisely determine the vehicle’s position, even with a weak satellite signal, and to provide directions at just the right time for proceeding along the route.”
To accomplish this, the navigation system constantly analyzes changes in vehicle direction and speed as detected by the sensor and transmits the vehicle’s position to the navigation map. According to the company, the data acquisition is so precise that the display of the vehicle’s position remains reliable even if the dropped signal persists for some time.
Bosch says the capabilities of the SMI230 MEMS sensor not only improve navigation, but they can also be used in fleet management and toll systems, as these areas also require precise motion detectors. Furthermore, the sensor is suited for use in vehicle alarm systems because of its ability to detect vibrations and impacts. If there is an accident—detectable through extremely negative acceleration values (collision) or enormous rotational motion (flipping)—the sensor data can still trigger the automatic eCall emergency call system.
For more information, visit www.bosch.us.