Has Japan developed a new inertial sensor that can assist vehicles in decimeter-level positioning?
According to foreign media EDN Japan, Murata Manufacturing Co., Ltd. recently announced that it has successfully developed a six-axis MEMS (Micro Electro Mechanical System) inertial sensor-SCHA600 that meets the AEC-Q100 standard (a common standard for automotive electronic systems).
The SCHA600 sensor adopts an integrated package and can be used in vehicle ADAS (advanced driving assistance system) and AD (automatic driving) to provide decimeter-level positioning for vehicles. Therefore, SCHA600 sensors can help vehicles achieve safe and reliable autonomous driving.
In the external working environment of -40℃~+110℃, the SCHA600 sensor can also work normally. The sensor can detect the angular velocity and acceleration of the vehicle, and the internal gyro RMS noise level is less than 0.07 degrees/sec.
Not only that, the SCHA600 sensor can also perform self-test and diagnosis.
SCHA600 sensor
1. Japan successfully developed the SCHA600 sensor to assist vehicles in decimeter-level positioning
According to foreign media reports, Japan's Murata Manufacturing Co., Ltd. recently announced that it has successfully developed a six-axis MEMS inertial sensor-SCHA600 that meets the AEC-Q100 standard.
The SCHA600 sensor adopts an integrated package and is small in size. The housing size of this type of sensor is 18.7*8.5*4.5mm (length * width * height), and the volume is only 715mm. It is easy to integrate and install into the vehicle. It can be applied to the ADAS and In AD, real-time motion status and positioning information at the decimeter level are provided for vehicles.
According to Murata, the SCHA600 sensor uses a unique capacitive 3D MEMS technology, which has the characteristics of small size, high positioning accuracy and power saving. The sensor adopts a 32-pin structure and an SOIC (small outline integrated circuit) integrated package. The positioning accuracy error is only tens of centimeters, and it complies with ASIL-D (the highest level of automotive safety integrity).
It is understood that the positioning accuracy and response speed of the global navigation positioning system will be greatly reduced when vehicles enter tunnels, under bridges or in underground parking lots. The six-axis inertial sensor SCHA600 from Murata, Japan may be able to help solve this problem.
2. The SCHA600 sensor can adapt to the working environment of minus 40 degrees
SCHA600 sensor not only has high positioning accuracy, but also can adapt to the working environment of -40℃~+110℃ to perform self-test and diagnosis functions.
By integrating the 3-axis angular velocity meter and accelerometer, the SCHA600 sensor device is reduced in size and the freedom of design is improved. The angular velocity measurement range of the SCHA600 sensor is ±125 degrees/sec or ±300 degrees/sec, and the acceleration measurement range It is ±6g.
This type of sensor is also minimally affected by temperature changes, the error caused by temperature changes is less than 0.3 degrees, the Alan dispersion is 0.9 degrees per hour, the noise level is low, the gyro RMS noise level is less than 0.007 degrees per second, and the bias stability and anti-vibration Excellent performance, the operating voltage of the sensor is 3.0V~3.6V.
Not only that, the SCHA600 sensor also has fault detection and diagnosis functions. The specific approach is to monitor internal reference signals, reserve communication error bits, and monitor and verify abnormal signals.
Murata Manufacturing Co., Ltd. said that it will verify the orthogonality of the sensor's measuring axis, allowing vehicle system integrators to save time and money. The sensor will be put into mass production in December this year.
Conclusion: SCHA600 sensor may make up for the lack of global navigation positioning system
The global navigation and positioning system is not ideal in certain extreme environments, such as the signal, positioning accuracy and response speed of tunnels, bridges and underground parking lots, which increases the technical difficulty and risk factor for autopilot.
The SCHA600 sensor successfully developed by Murata Manufacturing Co., Ltd. has a small size, high positioning accuracy, strong anti-interference ability, and can adapt to extreme temperature environments, or can make up for the shortcomings of the global navigation and positioning system, and contribute to the development of autonomous driving.
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