The Security Needs Of The Consumer Driven Automotive Sensor Market - Sensors, Security Needs -
Car security is a major challenge facing the designers
, especially in today's definition of consumer safety is not only the safety and reliability of the vehicle itself, but also in those who pass the electronic control technology to provide more security auxiliary drive system, the expansion of this demand driven market demand for some sensor IC has gradually expanded.Car Security is a major challenge facing the designers, especially in today, consumers are not only the definition of safety security and reliability of the vehicle itself, but also reflected in those who pass the Electronic Control technology to provide more security for driver assistance systems, the expansion of this demand driven market demand for some sensor IC has gradually expanded.
Past some of the luxury high-end configuration has been as the term has gradually spread to intermediate grade term markets, such as electronic stability control (ESC), electronic power steering system ( EPS ), Anti-lock brake system (ABS), acceleration skid control (ASR), tire pressure monitoring system (TPMS), radar ranging, etc., and in these terms behind the hidden great variety of Sensor Technology.
Inertial sensors Inertial sensors including accelerometers and gyroscopes are mainly used to monitor air bags, flip monitor, ESC, GPS navigation, anti-roll system. The MEMS technology, is making more effective use inertial sensors including automotive electronics, including a variety of electronic products. For example, ESC MEMS inertial sensor market system is the main engine of growth. Some countries in Europe and the United States, ESC system has become the standard vehicle components, and since 2012 style, the U.S. and EU requirements Sell Of passenger cars must be equipped with ESC. The coercive measures will increase the car market accelerometers and gyroscopes demand.
Nowadays, in a fully functional car will use a lot of inertial sensors. In some cases, will use up to 15 axes of the inertial sensors (accelerometers and gyroscopes). Since only six possible mechanical degrees of freedom, apparently there are lots of these sensors is redundant. "The reason for this result is a long time customer of each system are from different vendors to buy. But today, the concept of inertial sensors group will be sent to any of their information systems needs, as many auto OEM goal. "ADI's Greater China, said automotive e-business manager of the earthquake.
Addition to many of today's cars use the front and side impact airbags, rollover detection system is also currently trucks, pickups and popular SUV in the open, because the higher the possibility of a vehicle rollover. "ADI's iMEMS? Accelerometers and gyros for these applications. In rollover incident, the deployment of rollover airbags to protect the safety of passengers. Roll detection system by reading the vehicle's roll angle and roll rate to determine if the car in the roll process. If you determine the occurrence of rollover, rollover airbags to protect passengers will pop up. "Earthquake said Lee.
Roll for the use of accelerometer detection system, the most important performance parameter is the stability of zero-g offset and sensitivity. In general, assuming the availability of the minimum deceleration forces (such as wet roads) is about 100mg (0.98m/s2). Therefore, in the automotive temperature range and sensitivity of zero-g bias shift portfolio value must not exceed 100mg. Lee introduced the earthquake, ADI's ADXLiMEMS? Accelerometers in the automotive temperature range of zero-g offset with 16mg stability and sensitivity drift of 0.3% is ideal for such applications.
High precision angle measurement is highly automatic adjustment of headlights, electronic parking Brakes And the unique Hill Start Assist (HSA) system is integral to the function. STMicroelectronics provides AIS226DS is a coplanar axis accelerator sensor measurement accuracy is higher than the two independent solutions. The device's maximum range is 6g, can reliably distinguish the slight angle is less than 0.02 degrees. In addition, the company also recently introduced a full line of single-axis (yaw) and dual-axis (pitch and roll, pitch and yaw) MEMS gyroscopes, providing a scale ranging from 30dps up to 6,000 dps.
High aspect ratio process technology development to enhance the performance of the MEMS sensor. Freescale's MMA6222EG, MMA6255EG and MMA621010EG inertial sensors based on high aspect ratio MEMS technology, the accelerometer advanced converter design enhances the performance of sensor offset, and ultra-damping response, thus helping to improve system reliability and high frequency, high amplitude parasitic resistance to shock.
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