Mobility Solutions

Sensors for increased safety in vehicles New generation of Bosch inertial sensors SMI7xy combines measurement of yaw rate and acceleration

  • Broad range of applications - from ESP® to rollover detection
  • Can be used in applications up to ASIL D in accordance with ISO 26262
  • Optimized for robust operation and extremely space-saving
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  • March 10, 2014
  • Mobility Solutions
  • Press releases

press release

Bosch has launched a new generation of inertial sensors. The SMI7xy sensor platform is designed specifically for use in active and passive safety systems and in driver assistance systems. These new sensors are very robust and take up very little room, as they are supplied in a compact BGA housing that measures just 7x7x1.5 mm3.

The SMI7xy platform comprises four types of sensors in two categories: type SMI720 and type SMI740 sensors for basic applications, and type SMI700 and type SMI710 sensors for more demanding applications. Depending on their final application, the sensors can be used up to ASIL D (SMI720 up to ASIL C) in accordance with the ISO 26262 safety standard. All models feature an integrated safety controller; the SMI700 and SMI710 also offer a robust offset stability. When outputting data via their serial peripheral interface (SPI), the sensors use the two most widespread versions of SPI protocol.

Particularly suited to demanding vehicle dynamics applications
The SMI700's housing contains a yaw-rate sensor (z axis) and a 2-axis acceleration sensor (x and y axis). This sensor can optionally register high accelerations of up to 35 g. In addition to its SPI, the SMI700 comes with a PSI5 interface and a CAN interface – two standard data output interfaces in automotive electronics. These characteristics make the SMI700 the ideal sensor for use in ESP® systems and in demanding vehicle dynamics applications such as hill hold control, adaptive cruise control, and active front steering.

The SMI710 also combines a yaw-rate sensor (x axis) with a 2-axis acceleration sensor (this time y and z axis). It features a PSI5 interface and a CAN interface. This means it is capable of detecting a rollover and meets the requirements for use in demanding driver assistance functions such as roll and pitch stability programs.

Rollover detection and ESP®
The SMI720 sensor is designed specifically for rollover detection. Its housing contains a yaw-rate sensor (x axis) and a 1-axis acceleration sensor (z axis). Meanwhile the SMI740 has a yaw-rate sensor (z axis) and a 2-axis acceleration sensor (x and y axis). Since the SMI740 is designed according to standard ESP® specifications, it is tailored to basic vehicle dynamics control.

Samples of the SMI7xy are already available.

Background to MEMS technology
Bosch has been at the forefront of MEMS (microelectromechanical systems) technology since the very beginning. Since the start of production in 1995, the company has manufactured well in excess of three billion MEMS sensors, with production volumes hitting new highs year after year. In 2013, more than a billion sensors rolled off the production lines at the company's Reutlingen plant. The range includes sensors for measuring pressure, acceleration, humidity, temperature, yaw rate, inertial, and geomagnetic field, as well as MEMS microphones for a wide range of applications in the consumer electronics and automotive industries. More information on Bosch sensors is available online at www.bosch-sensors.com.

Readers' contact:
Jochen Volm,
Phone +49 7121 35-6651

Mobility Solutions is the largest Bosch Group business sector. In 2015, its sales came to 41.7 billion euros, or 59 percent of total group sales. This makes the Bosch Group one of the leading automotive suppliers. The Mobility Solutions business sector combines the group’s expertise in three mobility domains – automation, electrification, and connectivity – and offers its customers integrated mobility solutions. Its main areas of activity are injection technology and powertrain peripherals for internal-combustion engines, diverse solutions for powertrain electrification, vehicle safety systems, driver-assistance and automated functions, technology for user-friendly infotainment as well as vehicle-to-vehicle and vehicle-to-infrastructure communication, repair-shop concepts, and technology and services for the automotive aftermarket. Bosch is synonymous with important automotive innovations, such as electronic engine management, the ESP anti-skid system, and common-rail diesel technology.

The Bosch Group is a leading global supplier of technology and services. It employs roughly 375,000 associates worldwide (as of December 31, 2015). The company generated sales of 70.6 billion euros in 2015. Its operations are divided into four business sectors: Mobility Solutions, Industrial Technology, Consumer Goods, and Energy and Building Technology. The Bosch Group comprises Robert Bosch GmbH and its roughly 440 subsidiaries and regional companies in some 60 countries. Including sales and service partners, Bosch’s global manufacturing and sales network covers some 150 countries. The basis for the company’s future growth is its innovative strength. Bosch employs 55,800 associates in research and development at 118 locations across the globe. The Bosch Group’s strategic objective is to deliver innovations for a connected life. Bosch improves quality of life worldwide with products and services that are innovative and spark enthusiasm. In short, Bosch creates technology that is “Invented for life.”

Further information is available online at www.bosch.com and www.bosch-press.com, http://twitter.com/BoschPresse.

PI8507 - March 10, 2014

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