Tag Archives: accelerometer

MEMS — A 22-billion-dollar-worth industry by 2018

Thanks to Micro-Electro-Mechanical-Systems MEMS technology, which will be a 22-billion-dollar-worth industry by 2018, our mobile phones are equipped with accelerometers and gyroscopes so they know the direction and rotate our mobile screen as needed. The applications of MEMS had expanded a lot in various fields like: energy harvesting using piezoelectric effect, microphones, gyroscopes, pressure sensors, accelerometers and many more. Moreover, this micro-level technology is going to be nano-level with Nano-Electro-Mechanical-Systems NEMS.

Image is adapted from HowToMechatronics.com YouTube channel

The basic idea behind MEMS is about having moving parts inside the silicon chip. Accelerometers for example, one of the most famous applications of MEMS, sense the acceleration by measuring the change of the capacitance C1, C2 between a moving part/mass and fixed plates. So when acceleration is applied in a particular direction it can be detected and measured.

Image is adapted from engineerguy YouTube channel

The amazing “How a smartphone knows up from down” video presented by Bill Hammack (engineerguy) can demonstrate in a clear way the principle of MEMS.

Last but not least, MEMS has applications in medical and health related technologies like Lab-On-Chip. LOCs can integrate a laboratory function in a single chip. So MEMS may not only solve technical problems, but they may also play an important role in solving problems in human health field.

“Genotyper” device. via NIAID

Tri-axis sensor embeds pedometer

Susan Nordyk @ edn.com discuss about the Kionix’s accelerometer with integrated pedometer.

The K126 16-bit tri-axis digital accelerometer from Kionix integrates a step detector and step counter, yet minimizes power consumption. Housed in a tiny 2×2×0.9-mm LGA package, the K126 offers user-selectable g ranges of ±2 g, ±4 g, and ±8 g and output data rates of up to 25.6 kHz.

Tri-axis sensor embeds pedometer – [Link]

Accelerometers for vibration measurements & wireless condition monitoring

Graham Prophet @ eedesignnewseurope.com discuss about two new MEMS accelerometers from Analog Devices:

Analog Devices (ADI) has added two devices to its low noise, low drift, low power, three-axis MEMS accelerometers. The low noise performance over high frequencies provided by the ADXL356 and ADXL357 MEMS accelerometers delivers high resolution vibration measurements that enable the early detection of machine failure in condition monitoring applications.

Accelerometers for vibration measurements & wireless condition monitoring – [Link]

3-axis accelerometer performs wake-up in consumer designs


Kionix (Ithaca, New York), part of the Rohm Group, has added the KXTJ3 3-axis low-cost accelerometer that offers the performance of a more expensive accelerometer in a 2 x 2 x 0.9 mm form factor. By Graham Prophet @ eedesignnewseurope.com

The company presents the device as a high performance and reliable accelerometer in a package that is sized and priced to be embedded in anything and everything, from toys, wearables, remote controls to the SmartHome and IoT.

3-axis accelerometer performs wake-up in consumer designs – [Link]

Motion sensor offers low-power settings

Susan Nordyk @ edn.com writes:

Small enough for wearable devices, STMicroelectronics’ LIS2DW12 three-axis accelerometer draws only 50 nA in standby mode and 380 nA in low-power mode at a 1.6-Hz output data rate, adding negligible load on the battery. Operating from a supply voltage of 1.62 to 3.6 V, the LIS2DW12 enables extended operation from small coin or button cells.

Motion sensor offers low-power settings – [Link]

Smart sensors track fitness activity

STMicroelectronics’ LIS2DS12 3-axis accelerometer, LSM6DSL/M 6-axis inertial module, and new LSM303AH eCompass enable always-on fitness-tracking applications to operate longer and record progress more accurately. by Susan Nordyk @ edn.com:

These smart sensors help track movement continuously with minimal impact on device battery life by performing various motion-related calculations on-chip, instead of using the main system processor.

Smart sensors track fitness activity – [Link]

+/- 1.7g Dual-Axis IMEMS Accelerometer Using ADXL203

The ADXL203 Module  is high precision, low power, complete dual-axis accelerometers with signal conditioned voltage outputs, all on a single, monolithic IC. The ADXL203 measure acceleration with a full-scale range of ±1.7 g, ±5 g, or ±18 g. The ADXL203 can measure both dynamic acceleration (for example, vibration) and static acceleration (for example, gravity).The typical noise floor is 110 μg/√Hz, allowing signals below 1 mg (0.06° of inclination) to be resolved in tilt sensing applications using narrow bandwidths (<60 Hz).The user selects the bandwidth of the accelerometer using Capacitor CX and Capacitor CY at the XOUT and YOUT pins. Bandwidths of 0.5 Hz to 2.5 kHz can be selected to suit the application.

+/- 1.7g Dual-Axis IMEMS Accelerometer Using ADXL203 – [Link]

Embedded orientation detection using the MMA8450Q

an_nxp_an3915

NXP’s accelerometer chip MMA8450Q, provides orientation detection on handheld devices:

This application note targets the portrait/landscape orientation detection feature which has become standard in many hand-held electronic devices. Additionally, this application note aims to explain uses as well as highlight some of the challenges of designing an embedded algorithm into the sensor. Included in content, the embedded settings of the MMA8450Q are explained and detailed for implementation.

Embedded orientation detection using the MMA8450Q – [Link]

BMX160 from Bosch Sensortec, a New Smallest 9-axis Motion Sensor

Bosch Sensortec announced a new 9-axis motion sensor, the BMX160, on June 21, 2016. BMX160 targets smartphones, smartwatches and other wearables applications. It has a low power consumption (580 μA), which is proper for long working time on battery for this type of applications, also BMX160 is fully Android Marshmallow compliant.

BMX160 integrates 3-axis accelerometer, gyroscope and geomagnetic. This new sensor comes in 14-pin 2.5 × 3.0 × 0.95 mm³ LGA package and Sensortec claims that it’s the world’s smallest 9-axis motion sensor until now.

BMX160BMX160 is fully compatible to BMI160 to easy upgrade your design from the 6-axes measurement unit to the 9-axes one. It has 1024 byte FIFO buffer and a wide VDD voltage range from 1.71V to 3.6V and a VDDIO range from 1.2V to 3.6V.

[press release]

[Product Flyer]

Tiny motion sensor fits wearable devices

pro_BMX160_m_2

by Susan Nordyk @ edn.com:

Bosch Sensortec’s BMX160 is a 9-axis motion sensor touted as the smallest in the industry for wearable and augmented/virtual-reality devices. The miniature device is housed in a 2.5×3.0×0.95-mm, 14-pin LGA package, small enough for smartphones, smart watches, fitness trackers, and even smart eyewear and jewelry.

Combining an accelerometer, gyroscope, and geomagnetic sensor, the BMX160 meets the increasingly more stringent low-power requirements required by wearable devices. The BMX160 reduces power consumption to below 1.5 mA and effectively replaces the mainstream two-component design, which employs a 6-axis inertial measurement unit and a 3-axis geomagnetic sensor.

Tiny motion sensor fits wearable devices – [Link]