1、AccelerometerBilly1contentAccelerometer principleMEMS Accelerometer(LIS331DLH)Accelerometer applicationGyroscope principleMEMS Gyroscope(L3G4200DH)Gyroscope application2Accelerometer principlemFamadtdvmdtvmdF/)(mFa/3Accelerometer principlemGg/4MEMS AccelerometerdSCvqCdaMEMS Micro-Electro-Mechanical
2、Systems56LIS331DLHDescriptionThe LIS331DLH is an ultra low-power high performance three axes linear accelerometer belonging to“nano”family with digital I2C/SPI serial interface standard output.Features16 bit data output2 independent programmable interrupt generators for free-fall and motion detectio
3、n.+-2g/+-4g/+-8g dynamically selectable full-scalesSmart embedded function10000g high shock survivability7ISS331DL8LIS331DLH9LIS331DLH10LIS331DLH11LIS331DLH12LIS331DLH13LIS331DLHRegister(128 bytes 8 bit)Control is behaviorRetrieve acceleration dataSelect operation mode14LIS331DLH15LIS331DLH measurem
4、entI2C waveform and data Write Command accel-fct:measure pin 4&616LIS331DLH measurementI2C waveform and data Write Command accel-intr:measure pin 4&617Accelerometer applicationFree-fall detectionMotion activated functionsGaming and virtual reality input device Vibration monitoring and compensation18
5、Q&A19GyroscopeBilly20 Gyroscope A gyroscope is a device for measuring or maintaining orientation,based on the principles of conservation of angular momentum.vmrprL21MEMS Gyroscope Coriolis force)(2vwmFc)(2vwac22MEMS Gyroscope 23MEMS Gyroscope24L3G4200DHLow-power there axes angular rate sensorThree s
6、electable full scales (+-250/+-500/+-2000dps)I2C/SPI digital output interfaceSmart embedded functions16 bit-rate value data output8-bit temperature data ouput25L3G4200DH26L3G4200DH27L3G4200DH28L3G4200DH29L3G4200DH30L3G4200DHPin 14 PPFILT maximum voltage level is equal to Vdd.31L3G4200DH32L3G4200DH33
7、L3G4200DH34L3G4200DHFive modes(select by FIFO_MODE bits in register)Bypass modeFIFO modeStream modeBypass-to-Stream modeStream-to-FIFO mode35Bypass modeOnly one slot used,when new data input old data will be overwritten.36FIFO modeWhen the data filled to the level specified in REG,it will trigger a
8、interrupt.The FIFO continues filling until full.When full FIFO stop collection data,to restart collection data it is necessary back to Bypass mode.37Stream modeLike FIFO mode,but when full it will discards the older data as new data arrives,and can generate a interrupts on the DRDY/INT2 pin.38Bypass
9、-to-Stream modeThe FIFO starts operating in Bypass mode,once a trigger event occurs(INT1_CFG register events)the FIFO starts operating in Stream mode.39Stream-to-FIFO modeThe FIFO starts operating in Stream mode,once a trigger event occurs(INT1_CFG register events)the FIFO starts operating in FIFO mode.40Gyroscope application41Gyroscope applicationGame controllers.Assisted-GPS navigation systems.Image stabilization.Tilting and angular motion detection in robotics.42The endThanks!43
