MEMS sensors address airbags, body applications
March 10, 2014 // Christoph Hammerschmidt
With two new inertial sensor families Bosch addresses the needs of modern car design in various areas of the vehicle. The SMA6xy sensor family makes facilitates the integration of airbag systems; the SMI7xy family aims at driver assistance systems and vehicle dynamics applications.
The sensors that control the airbag systems are typically distributed across the vehicle - some are in or near the airbag control system, others are located in the front or rear section or in the doors for early crash detection. The SMA6xy family takes this into account - there are versions available designed for peripheral deployment and for the airbag control unit. The types for peripheral are designed for forces of up to 120g or 480g, depending on the type. In addition to the normal x and y channels, these sensors are In addition to the normal x and y channels, these sensors are also available with a z channel for measuring acceleration in the vertical axis. So whatever the desired orientation of the sensor's installation, there is a version to match. This gives airbag system developers greater design freedom. Compared to previous versions, the new sensors are better protected against microcuts - extremely brief interruptions in power supply to the sensor as a consequence of an impact. The sensors now tolerate interruptions of up to 10 microseconds.
The implementation for integration in the airbag control unit senses forces of up to 120g in all three axes. To facilitate the requirements of individual car designs, the sensors are available in implementations with one or two axes as well.
The other series of MEMS sensors Bosch released today are designed for utilisation in a broad range of body and ADAS applications - from ESP to hill-hold systems or rollover detection. This series measures forces of up to 35 g and bears the type designation SMI7xy and is optimised robust operation in environments with limited space conditions. Again, this family embraces two categories - the SMI720 and SMI740 are designed for basic applications whereas the SMI700 and SMI710 meet higher requirements. Depending to the application, the devices meet safety levels up to ASIL D (the highest). The SMI700 and SMI710 contain a yaw rate sensor and a 2-axis acceleration sensor each; the axis configuration varies by type. The SMI720 is optimised for rollover detection and contains a yaw rate and an acceleration sensor, each with one axis. The SMI740 features similar characteristics but is optimised for vehicle dynamics control.
For more information visit http://www.bosch-semiconductors.de/en/ubk_semiconductors/homepage/homepage_1.html
Related articlesAll news
What she sees is what you get
July 06, 2015
360º video is an ongoing experiment, something that's technically feasible, yet whose consumer use-cases are not quite well ...
Private equity makes moves on GaN startup
TSMC overtakes Intel in chip capex ranking
3D fingerprint scanner beats Apple's
Solar powered flight smashes long distance records
Electric double-decker buses lead London's zero emission drive
July 06, 2015
Global electric vehicle leader, the Chinese-based BYD Company Ltd. has been selected to build the next generation of London's ...
Another kind of SUV: High agility at zero local emissions
Biodegradable electronics debut
Power magnetics Lab Kit enters education
- Critical Requirements in High Speed Signal Generation Applications
- The 400XAC Series: Two Major Advantages that Simplify Functional Testing
- A Smart Way to Drive ECU Consolidation
- Autonomous Driving: An Eye on the Road Ahead
InterviewCEO interview: Cadence is about enablement, collaboration
EDA companies are being asked to provide expertise from the circuit- to the system-level observes Lip-Bu Tan, CEO of EDA software vendor Cadence Design Systems Inc. Covering such a breadth of endeavour ...
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
This month, Novelda is giving away two full XeThru Inspiration kits worth 1499 US Dollars each, for EETimes Europe's readers to experiment first hand with its XeThru technology.Based on the use of radio waves, rather than infrared, ultrasound or light, the company's X2M1000 Inspiration modules can detect presence just from the chest movement while breathing, and measure both the rate and... MORE INFO AND LAST MONTH' WINNERS...
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.