{"id":1453,"date":"2012-09-25T12:34:29","date_gmt":"2012-09-25T11:34:29","guid":{"rendered":"http:\/\/www.atttraining.com\/auto\/?p=1453"},"modified":"2014-03-28T14:13:29","modified_gmt":"2014-03-28T14:13:29","slug":"crash-sensors","status":"publish","type":"post","link":"http:\/\/tomdenton.org\/blog\/?p=1453","title":{"rendered":"Crash sensors"},"content":{"rendered":"

Bosch has introduced the next generation of peripheral acceleration sensors for passenger protection systems in vehicles \u2013 the fifth since 1996. The key features of the new digital sensors include a wide measurement range of between \u00b1120 g and \u00b1480 g and the choice of communication via the SPI or the PSI5-V1.3 interface. Peripheral sensors are located at the outermost points of a vehicle’s engine compartment, at the sides, or at the rear, thus enabling them to recognize a collision quickly. However, the new fifth-generation models can do more than simply register a crash. In just a few milliseconds, they transfer to the airbag control unit all the data needed by the electronics system to determine with absolute certainty whether a collision is minor or serious. The control unit checks the plausibility of the incoming sensor data before deciding which vehicle restraint systems (e.g. front, head or side airbag and seat-belt pretensioners) to activate.<\/p>\n

Four measurement ranges, two sensors, and straightforward integration: Apart from their measurement ranges, the two new sensors are of virtually identical design. The SMA58x can be switched from \u00b1120 g to \u00b1240 g and is designed to be integrated into the peripheral side collision sensors. The SMA59x, with twice the measurement range, is specially designed for front collisions. Both sensors measure along the Y axis. The 10-bit measured-value resolution and measurement range limit values are used to calculate sensitivity values of between 1 LSB\/g and 4 LSB\/g.<\/p>\n

Thanks to the PSI5-V.1.3 bus interface, the sensors can be easily integrated, provided the airbag control unit also features a Peripheral Sensor Interface 5. Up to four bus users can then be operated in parallel or in series. To ensure the databus continues to function smoothly under such conditions, the new acceleration sensors feature an IDATA pin, which is used to select filters or attenuators with customer-specific dimensions. This wiring is integrated into the housing of the peripheral sensors along with the sensor chip.<\/p>\n

Bosch engineers have equipped the SMA58x and the SMA59x with an ultra-effective offset controller. This automatically makes both slow and fast offset adjustments. As a result, the sensors are very resilient to physical disturbances such as vibrations or significant fluctuations in ambient temperature. Two selectable low-pass filters with cut-off frequencies of 213 Hz and 416 Hz are also used to enhance signal conditioning.<\/p>\n

Background information on MEMS technology
\nBosch has shaped the development of MEMS technology (micro-electro-mechanical systems) from the outset. The company has manufactured well over two billion MEMS sensors since production began in 1993. Production volumes reach new highs year after year. In 2011 alone, around half a billion sensors rolled off the production lines in Reutlingen, making Bosch the global market leader. Its product portfolio comprises pressure sensors, acceleration sensors, yaw-rate sensors, and inertial sensors as well as MEMS microphones and terrestrial magnetic field sensors for a variety of automotive and consumer electronics applications. More information on Bosch vehicle sensors is available at www.bosch-sensors.com<\/a>.<\/p>\n

\"\"
\n<\/span><\/p>\n

\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n\n\n\n\n
\u00a0Technical data \u2013 SMA58x\/SMA59x (extract – typical values)<\/strong><\/span><\/td>\n<\/tr>\n
\u00a0Measurement ranges<\/span><\/td>\n\u00a0SMA58x: \u00b1120 g und \u00b1240 g
\nSMA59x: \u00b1240 g und \u00b1480 g<\/span><\/td>\n<\/tr>\n
\u00a0Sensierachse<\/span><\/td>\n\u00a0Y<\/span><\/td>\n<\/tr>\n
\u00a0Measured-value resolution<\/span><\/td>\n\u00a010 bits<\/span><\/td>\n<\/tr>\n
\u00a0Linearity deviation<\/span><\/td>\n\u00a0\u00b12 %<\/span><\/td>\n<\/tr>\n
\u00a0Permissible ambient temperature<\/span><\/td>\n\u00a0-40 \u00b0C to +125 \u00b0C<\/span><\/td>\n<\/tr>\n
\u00a0Supply voltage<\/span><\/td>\n\u00a0Max. 11 V<\/span><\/td>\n<\/tr>\n
\u00a0Current drain<\/span><\/td>\n\u00a0Max. 8 mA<\/span><\/td>\n<\/tr>\n
\u00a0Housing<\/span><\/td>\n\u00a0SOIC14n \u00a7 8.6 mm x 3.9 mm<\/span><\/td>\n<\/tr>\n
\u00a0Certificates<\/span><\/td>\n\u00a0Environment: RoHS<\/span><\/td>\n<\/tr>\n
\u00a0Delivery capability<\/span><\/td>\n\u00a0Series production under way, sample on request<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Bosch has introduced the next generation of peripheral acceleration sensors for passenger protection systems in vehicles \u2013 the fifth since 1996. The key features of the new digital sensors include a wide measurement range of between \u00b1120 g and \u00b1480 g and the choice of communication via the SPI or the PSI5-V1.3 interface. Peripheral sensors […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[15],"tags":[],"class_list":["post-1453","post","type-post","status-publish","format-standard","hentry","category-automotive"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p79TdE-nr","jetpack-related-posts":[{"id":555,"url":"http:\/\/tomdenton.org\/blog\/?p=555","url_meta":{"origin":1453,"position":0},"title":"Airbag acceleration sensor (Bosch)","author":"Tom Denton","date":"November 5, 2010","format":false,"excerpt":"SMA560 MEMS acceleration sensor for airbag control units \u00b7 Two sensing axes with separate measuring-range selection \u00b7 Measurement values output in Bosch-SPI or Open-SPI format \u00b7 SOIC8 package replaces SOIC14n package The dual-axis SMA560 model for airbag control units marks Bosch\u2019s entry into the fifth generation of micro-mechanical acceleration sensors.\u2026","rel":"","context":"In "Automotive"","block_context":{"text":"Automotive","link":"http:\/\/tomdenton.org\/blog\/?cat=15"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":237,"url":"http:\/\/tomdenton.org\/blog\/?p=237","url_meta":{"origin":1453,"position":1},"title":"Extensive safety in the new Audi A8","author":"Tom Denton","date":"April 27, 2010","format":false,"excerpt":"Bosch predictive emergency braking system goes into series production \u00b7 Environment recognition with radar and video sensors \u00b7 Of all the accidents involving injury and fatalities in Germany, 15 percent are rear-end collisions The Bosch automatic emergency braking system is going into series production for the first time. It provides\u2026","rel":"","context":"In "Automotive"","block_context":{"text":"Automotive","link":"http:\/\/tomdenton.org\/blog\/?cat=15"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":2607,"url":"http:\/\/tomdenton.org\/blog\/?p=2607","url_meta":{"origin":1453,"position":2},"title":"Automated mobility – Bosch","author":"Tom Denton","date":"May 10, 2017","format":false,"excerpt":"Automated driving impacts the entire car: its powertrain, brakes, steering, display instruments, navigation, and sensors, as well as connectivity inside and outside the vehicle. The key to success is an in-depth understanding of all vehicle systems. Few automotive suppliers worldwide have as much knowledge in this area as Bosch, in\u2026","rel":"","context":"In "Automated driving"","block_context":{"text":"Automated driving","link":"http:\/\/tomdenton.org\/blog\/?cat=38"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/tomdenton.org\/blog\/wp-content\/uploads\/2017\/05\/composing_voraussehend_11-300x150.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":1667,"url":"http:\/\/tomdenton.org\/blog\/?p=1667","url_meta":{"origin":1453,"position":3},"title":"Bosch collision warning system in use in racing at Le Mans","author":"Tom Denton","date":"June 18, 2013","format":false,"excerpt":"Bosch technology on board the Audi R18 e-tron quattro, Ferrari 458 Italia, GT2 Corvette C6.R, Porsche 911 RSR and Porsche 911 GT3 RSR as well as SRT Viper GTS-R Radar-based collision warning system being used by Corvette Racing Every Le Mans winner since 2000 has used Bosch injection technology This\u2026","rel":"","context":"In "Automotive"","block_context":{"text":"Automotive","link":"http:\/\/tomdenton.org\/blog\/?cat=15"},"img":{"alt_text":"1-BEG-19222","src":"https:\/\/i0.wp.com\/tomdenton.org\/blog\/wp-content\/uploads\/2013\/06\/1-BEG-19222-300x2161.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":1420,"url":"http:\/\/tomdenton.org\/blog\/?p=1420","url_meta":{"origin":1453,"position":4},"title":"Bosch ESP\u00ae plus","author":"Tom Denton","date":"May 24, 2012","format":false,"excerpt":"Bosch is currently rolling out series production of its new ESP\u00ae plus. With this version of Generation 9, many safety and assistance functions in addition to the anti-skid system can be integrated into the car. The high control precision of ESP\u00ae plus enables OEMs to integrate features such as adaptive\u2026","rel":"","context":"In "Automotive"","block_context":{"text":"Automotive","link":"http:\/\/tomdenton.org\/blog\/?cat=15"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":3010,"url":"http:\/\/tomdenton.org\/blog\/?p=3010","url_meta":{"origin":1453,"position":5},"title":"In motion: solutions for the mobility of today and tomorrow","author":"Tom Denton","date":"February 18, 2020","format":false,"excerpt":"Powerful computing for the electronics architecture of the future \u2013 vehicle computers: Increasing electrification, automation, and connectivity are placing ever higher demands on vehicles\u2019 electronics architecture. One key to the vehicles of the future lies in the new high-performance vehicle control units. Bosch vehicle computers will increase computing power in\u2026","rel":"","context":"In "Automated driving"","block_context":{"text":"Automated driving","link":"http:\/\/tomdenton.org\/blog\/?cat=38"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/tomdenton.org\/blog\/wp-content\/uploads\/2020\/02\/mediaspace_usbstick_download_19175_produktseite_battery_in_the_cloud_16_9_rgb-768x432.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/tomdenton.org\/blog\/wp-content\/uploads\/2020\/02\/mediaspace_usbstick_download_19175_produktseite_battery_in_the_cloud_16_9_rgb-768x432.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/tomdenton.org\/blog\/wp-content\/uploads\/2020\/02\/mediaspace_usbstick_download_19175_produktseite_battery_in_the_cloud_16_9_rgb-768x432.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/tomdenton.org\/blog\/wp-content\/uploads\/2020\/02\/mediaspace_usbstick_download_19175_produktseite_battery_in_the_cloud_16_9_rgb-768x432.jpg?resize=700%2C400 2x"},"classes":[]}],"_links":{"self":[{"href":"http:\/\/tomdenton.org\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1453","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/tomdenton.org\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/tomdenton.org\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/tomdenton.org\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/tomdenton.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1453"}],"version-history":[{"count":3,"href":"http:\/\/tomdenton.org\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1453\/revisions"}],"predecessor-version":[{"id":2105,"href":"http:\/\/tomdenton.org\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1453\/revisions\/2105"}],"wp:attachment":[{"href":"http:\/\/tomdenton.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1453"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/tomdenton.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1453"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/tomdenton.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1453"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}