When the vehicle collides, the acceleration sensor will communicate the collision intensity with the main control through an electrical signal, thereby judging that all airbags are used. At present, NXP, ADI, ST, Murata, National and other companies have achieved good results in the market share of acceleration sensors and the coverage of application fields.

The acceleration sensor is an ADSP-21062CSZ-160 sensor that measures the acceleration of the main body of the device. It mainly calculates the acceleration data by measuring the inertial force inside the sensor. At present, acceleration sensors have been used in many fields.

Application accelerometer

In the field of consumer electronics, the concept of metaverse has stimulated the growth of VR/VR devices. To enhance the immersive experience of virtual and reality, sensors are essential. The acceleration sensor in the VR/VR device can accurately monitor the user's acceleration and movement direction, adjust the image in time, effectively reduce dizziness, and improve the user interaction experience. Accelerometers are used in terminal products such as mobile phones and game consoles.

In the field of automotive electronics, the use of acceleration sensors ensures the safety and stability of driving to a certain extent. Generally used in automobile airbags and electronically controlled suspension systems. The acceleration sensor can monitor the driving state of the vehicle in real time. When the vehicle collides, the acceleration sensor will communicate the collision intensity with the main control through an electrical signal, thereby judging that all airbags are used. The accelerometer also senses changes in lateral acceleration while driving. After the ABS system receives the electrical signal, it will automatically open to prevent the driver from braking suddenly and causing the vehicle to roll over. Some vehicles can automatically adjust the driving direction after detecting the vehicle yaw.

With the improvement of users' demand for product experience and purchase, the sensor market is booming, the development prospects of acceleration sensors are favored by chips, and new players are constantly pouring in. At present, NXP, ADI, ST, Murata, National and other companies have achieved good results in the market share of acceleration sensors and the coverage of application fields.

NXP dual axis accelerometer

NXP accelerometer products have achieved full coverage of X-axis, Y-axis, and Z-axis, and can accurately detect the movement direction, trajectory, drop detection, vibration detection, collision detection, etc. of objects in three-dimensional space. At the same time, it has realized multi-scenario applications in the fields of automotive electronics, consumer electronics, and medical care. In addition, based on the acceleration sensor, the airbag system, electronic stability control system, electronic parking brake system and inclination measurement solution for the automotive field have been launched.

Internal topology of FXLS90 dual-axis acceleration sensor

FXLS90 series NXP covers single-axis and dual-axis acceleration sensors, which can complete acceleration detection in two axes. This series of sensors are mainly used in solutions for automotive airbag systems. The FXLS90 series uses NXP's unique UMEMS sensing technology, which greatly improves the performance of the sensor. In terms of chip integration, programmable DSP and 32-bit SPI are integrated. The DSP can be equipped with a 4-stage low-pass filter with a roll-off characteristic of 12.5Hz to 1500Hz, or a single-stage high-pass filter can be selected for fast-start output rate limiting. The sensor meets the application standard of AEC-Q100 automotive regulations, with a temperature resistance range of -40°C to 125°C, and is packaged in a 16PinQFN that meets electromagnetic compatibility requirements.

ADI triaxial accelerometer.

ADI's accelerometers lead the way in power, noise, and operating temperature, enabling high-resolution vibration detection with extremely low noise. Products include analog and digital accelerometers for a wide range of applications.

ADXL317 structure topology

ADXL317 is an acceleration sensor that complies with the AEC-Q100 vehicle standard and can be used in automotive intelligent suspension control system solutions. ADXL317 adopts three-axis detection method, the highest resolution is ±16g, the low noise value of X-axis and Y-axis is 55μg/Hz, and the low-noise value of Z-axis is 120μg/Hz. The accelerometer features low latency (90μs in 4kHz bandwidth) and fast response, allowing sufficient time to suppress bandwidth noise through fast system response. At the same time, it has I2C communication bus interface and 48kHz I2S/TDM digital output, of which the I2C interface can communicate with external systems to complete program writing. ADXL37 operates from 4°C to +125°C

Murata accelerometer

Murata's low G accelerometers lead the industry. Murata's accelerometer products are developed based on Murata's unique 3DMEMS technology and have unique product features.

SCL3300 is a three-axis accelerometer based on Murata3DMEMS technology with a measurement accuracy of ±3.6g. It supports angle output and SPI digital interface. The SPI digital interface can flexibly transmit the electrical signal transmitted by the sensor to the main control device. SCL3300 has zero Due to the characteristics of partial stability, extremely low noise, and good anti-vibration, even in harsh application scenarios and vibration conditions, it can still run with high performance and high-precision output. The standard power supply voltage of SCA3300 is 3.3V, the power current is 1ma under the standard voltage, 40 ℃ to +125 ℃.

In terms of applications, the SCA3300 can improve the characteristics of offset temperature drift and is less affected by temperature range. The accelerometer has high reliability and advanced self-checking function. It has passed the AEC-Q100 standard certification and can be used in automobiles. At the same time, it can also be used to detect the deformation and cracks of buildings and bridges, and to detect the state of buildings in real time.

Summarize

The role of accelerometers in consumer electronics applications is mainly entertainment, and the role in sub-applications is mainly entertainment. In the automotive field, the main role of industrial applications is to improve safety, ensure the safety of people or things, and avoid accidents.