典型MEMS器件介绍ppt课件
- 格式:ppt
- 大小:3.42 MB
- 文档页数:10
Inertia Sensor for Automobile “Air Bag”Micro inertia sensor (accelerometer) in place:Sensor-on-a-chip:(2 mm x 3 mm-smaller thanrice grain(Courtesy of Analog Devices, Inc)Rice grainsOver 100 micro-sensors and micro-actuators by MEMS technologyThe ENIAC Computer in 1946A “Palm-top”Computer in 2003This spectacular miniaturization took place in 50 years!!The ENIAC computerMobil phones 15 Years Ago:Current State-of-the Art:Transceive voice onlyTransceive voice+ others Palm-top Wireless PCThe only solution is to pack manyMicro pressure sensorsInertia Sensor for Automobile “Air Bag”Micro inertia sensor (accelerometer) in place:Sensor-on-a-chip:(the size of arice grain(Courtesy of Analog Devices, Inc) Unique Features of MEMS and Microsystems (1)-A great challenge to engineersComponents are in micrometers with complex geometryusing silicon, si-compounds and polymers:25 µmA microgear-train by(1)(10)(2)(3)(4)(5)(6)(8)(9)(2) Exhaust gas differential pressure sensor(1) Manifold or Temperature manifold absolute pressure sensor (3) Fuel rail pressure sensor(4) Barometric absolute pressure sensor (5) Combustion sensor(7) Fuel tank evaporative fuel pressure sensor (6) Gasoline direct injection pressure sensor (8) Engine oil sensor (9) Transmission sensor (10) Tire pressure sensorApplication of MEMS and MicrosystemsinAerospace IndustryCockpit instrumentation.Wind tunnel instrumentation MicrosattellitesCommand and control systems with MEMtronicsInertial guidance systems with microgyroscopes, accelerometers and fiber optic gyroscope.Attitude determination and control systems with micro sun and Earth sensors.Power systems with MEMtronic switches for active solar cell array reconfiguration, andMicro lenses:Micro switches: Micro Optical SwitchesMigratingElectrons The strains associated with the deformation of the diaphragm areplaced in “strategic locations”onThese tiny piezoresistors are madeThere is preset mismatch of pitches of the electrodes in the two sets.Stator RotorGear fortransmittingtorqueStationary electrodesMoving electrodeThe movement of the proof mass is carried out by measuring the change of capacitances between the pairs of electrodes.B e a m M ov e m e n tA c ce l e r a t i o nThe need for integrating microelectronics (ICs)and moving microstructures –A great challenge!A c c e l e r a t i o n3 mm2 mm。