Safe, comfortable, free from contamination, economy is auto industry and the objective that the user pursues all the time. The electron that realizes the key of these targets to depend on a car is changed and intelligence is changed, precondition is all sorts of information is seasonable get, this certainly will asks to use all sorts of sensor in great quantities in the car. Car sensor can run the car all sorts of operating mode message in the process, if dynamical drive, safety administration and automobile body are comfortable,wait for systematic parameter, change into telegraphic date to carry unit of the control central (ECU) , the adjustment of by ECU and feedback make the car is in optimal moving condition. Among them, dynamical drive system uses sensor measure most, safe system and comfortable system develop with sensor market the fastest. Traditional sensor often bulk and weight are great, cost is high, they get in the application of the car very big limitation.

 

MEMS sensor will emphasize development

 

In recent years from semiconductor integrated circuit (IC) the MEMS that the technology develops and comes (Microelectromechnical System, microelectronics machine system) the technology is mature with each passing day. Use this one technology to be able to be made all sorts of can sensitive and detect the miniature sensor of mechanical quantity, magnetics quantity, heat quantity, chemical quantity and biomass, the bulk of these sensor and specific power consumption are small, can realize a lot of brand-new functions, facilitate large quantities of quantities and high accuracy are produced, odd a cost is low, easy form large-scale and muti_function array, these characteristics make they special agree with the application of car respect at the beginning of 80 time, multichannel of type of miniature pressing block is absolutely pressure (Manifold Absolute Pressure) sensor begins large quantities of quantities to produce, replaced inchoate the pressure sensor that uses LVDT technology.

 

Sensor of acceleration of miniature of 80 time metaphase begins to be used at automobile safety gasbag, they are so far mass-produced, the miniature sensor that gets applied extensively in the car. However the large-scale application situation of miniature sensor is sure not control of combustion of engine of be confined to and safe gasbag, in future 5 ～ include engine to run management, waste gas and air quality control, ABS inside 7 years (Antilock Brake System, prevent adopt dead system) , car is kinetic control, get used to system of security of travel of navigation, car oneself (if gasbag and fraise detect with avoid bump etc) inside application will be MEMS technology to provide broad market.

 

MEMS sensor can machine craft to realize the miniature of traditional sensor to change through small accept, the mechanical that big already range replaces a tradition, meet an emergency piece the sensor; such as type, slip potentiometer can be on same underlay rather his many MEMS sensor is muti_function compositive; can pass the compositive implementation with information processing and control chip to be diagnosed oneself, multi-parameter mixes measure, the intelligence such as error compensation, can narrow effectively integral bulk, reduce systematic power comsumption, raise dependability.

 

 

Safety management system gets lost active safety with sensor

 

Develop ceaselessly as the technology, automobile safety manages systematic target to already turned to active protection from passive defence. The security that using at present runs a system, if safe gasbag system, embryo controls the system that monitor, prevent adopt dead brake system (ABS) , force of electronic apply the brake allocates (EBD) system, advanced drive support system (ADAS) , night inspects a system to wait, used many sensor, collection information includes a car pressure of position of footplate of the acceleration of each direction, embryo pressing, apply the brake, collision, adjacent the warning. This kind of sensor is in recent years the part with the most active innovation of car application domain.

 

Dynamical drive system is paid attention to with sensor energy-saving decrease a platoon

 

Dynamical drive system basically includes engine and chassis management system, use sensor basically has flow transducer, pressure sensor (inlet pressure, air cylinder pressure, atmosphere, oil pressure) , temperature sensor (air, water, lube) , explode sensor of position of door of shake sensor, crankshaft sensor, aeriform chroma sensor, solar term, idle fast sensor, , and the wheel in automatic gear-box fast sensor of sensor, engine rotate speed and sensor of accelerator footplate position.

The information that the electronic control unit of engine provides according to sensor has accurate control to each operating mode of engine, the dynamical sex that raises engine thereby, can safeguard a gender, reduce oil bad news and reduce discharge. Because working environment is harsh, dynamical drive system is compared with sensor general industrial the precision of sensor and dependability all tower above 1 ～ 2 amounts class.