On February 10th, the US Highway Safety Administration (NHTSA) identified Google's automatic driving algorithm as a “driverâ€, which removed a major obstacle to the driver's final approval for driving on the road. Prior to this, the half-way of IT giants such as Apple and Intel and the strong promotion of major auto giants drove the rapid development of the driverless auto industry, but in the process it has been accompanied by the debate on the safety of smart cars. . In fact, the mature driverless car can automatically detect the risk factors in the driving environment, and automatically take measures such as deceleration, braking, and avoidance to avoid accidents. These processes react more quickly than people. To achieve the above-mentioned precision security features, you need a series of behind-the-scenes heroes to escort. In this respect, Murata, which is committed to providing intelligent one-stop solutions and has been deeply involved in automotive electronics for decades, is making every effort to provide high precision and high quality for the automotive electronics market in terms of “safetyâ€, “interconnection†and “pre-preventionâ€. Reliability of the product.
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3D positioning auto-driving vehicle, accurate and efficient escort
In mid-January this year, Murata produced a prototype of a sensor that can monitor the three-dimensional position of the vehicle and a device in which the sensor was installed at the 2016 Japan International Automotive Technology Exhibition. The sensor consists of two parts: Murata's inertial measurement unit (IMU) and air pressure sensor. Among them, the inertial measurement device includes a gyro sensor and a three-axis acceleration sensor. It is known that the sensor can detect changes in the horizontal and vertical position of the object with an error of ±5 cm. Murata plans to apply this sensor to the positioning of self-driving vehicles in the future. In order to show the positioning effect, Murata specially ran a toy car equipped with the sensor on the spiral runway of the exhibition hall and showed the three-dimensional position of the toy car.
For most cars today, their positioning systems are based on the Global Positioning System (GPS). When a vehicle crosses a tunnel or a dense building and it is difficult to receive GPS signals, the IMU is used to correct and estimate changes in the horizontal position of the vehicle. However, for unmanned driving, it is not enough to simply detect the change in the horizontal position of the vehicle. It is also necessary to accurately detect the three-dimensional position of the vehicle. For example, when a vehicle is traveling on a highway under an elevated road, the IMU can only detect a change in the horizontal position, so it is possible to misjudge the vehicle on the elevated road. The sensor displayed by Murata can easily measure the three-dimensional position of the vehicle through the air pressure sensor, which effectively assists the 3D positioning of the automatic driving.
2016 Japan International Automotive Technology Show Murata showcases toy cars with sensors
MEMS sensors are sensitive and precise to ensure that the car is "active and safe"
With the expansion of global information data acquisition requirements, the application of MEMS sensors plays an increasingly important role in people's lives. According to the data, the market size of MEMS components in 2014 can exceed 8 billion US dollars, with a growth rate of about 14%. An important source of growth is the automotive electronics sector. Murata, which has always pursued innovation, expanded its MEMS sensor products by acquiring the Finnish MEMS giant VTI in 2012.
The Murata MEMS sensor is mainly composed of microcomputer monocrystalline silicon. The application in the field of automotive electronics is mainly reflected in the early prevention of accidents in the driving process of automobiles, that is, "active safety."
It is understood that Murata is the first company in the industry to apply MEMS sensors to automotive active safety. Its MEMS sensors are widely used in ASB (Brake Anti-lock Braking System), ESC (Electronic Stability Control System) systems, and ECS (Electronic Control). Suspension), EPB (electric handbrake), HAS (ramp start assist), TMPS (tire pressure monitoring), engine anti-shake, vehicle inclination measurement, in-vehicle heartbeat detection, etc. Compared with “passive safety†after accidents such as “airbagsâ€, Murata’s MEMS sensors rely on their extremely high sensitivity and safety performance to “prevent problems before they occurâ€.
For example, its "tilt sensor" can make the car stand still when the road is tilted, and can detect the inclination angle of 2 degrees, and accurately measure the temperature and life. At the same time, Murata's accelerometers, gyro sensors that prevent rollover, pressure sensors, and sensors that can be used in tire pressure detection, as well as their combined sensors, have contributed to the active safety design of automobiles. These sensors are AEC-Q100 compliant, featuring high accuracy, high stability, and high reliability, especially in the field of automotive electronic stability systems (ESC).
Murata MEMS sensor
Today, in the field of ESC sensors, Murata occupies a large share of the mid- to high-end automotive market. For example, as early as the early 1990s, Mercedes-Benz led the adoption of Murata's MEMS sensors. ESC can control the wheels when the car makes a sharp turn, preventing the problem of rollover. At present, the European and American countries have been mandatory. In fact, both European and American car companies, such as BMW, Mercedes-Benz, Toyota, etc., or Chinese local car manufacturers, have applied to Murata's MEMS sensors.
In addition to its deep involvement in the field of active safety, Murata's MEMS sensors are also in the industry in emerging areas such as Advanced Assisted Driving Systems (ADAS), namely front vehicle collision warning, blind spot monitoring, lane departure warning and automatic parking. Technology frontiers. It is worth mentioning that sensor technology, as a support for autonomous driving technology, opens up new areas for safe driving. At the International Automotive Technology Conference on December 9 last year, Murata Senior Product Manager Tommi Vilenius delivered a keynote speech on "Autonomous Driving Technology and China", on the sensor technology needed for autonomous driving and for different levels of autonomous driving needs. Other topics such as better sensors were explored.
Murata Acceleration and Gyro Combination Sensor
Intelligent PEPS system makes automatic driving easier and safer
Murata also provides unlimited convenience for automatic driving while ensuring high reliability and safety. The traditional car door is opened remotely by the key end, and sometimes it needs manual operation; but the appearance of PKE (PEPS) completely solves this problem. The use of a wide range of PEPS (keyless start-up system) not only allows users to start the car easily and quickly, but also gives the car anti-theft function. In PEPS applications, Murata can provide a full range of antennas for vehicles or car keys.
This feature brings a great user experience and meets people's requirements for convenience and comfort. The owner does not need to use the key at all during the entire driving process, just carry it with him. When the owner enters the effective range near the car, the vehicle will automatically detect the key and identify it. If the driver succeeds, the door or trunk will be opened accordingly. When the owner enters the car, simply press the engine start button and the vehicle will automatically detect the key. The location, to determine whether the key is in the car, whether it is in the main driving position, if successful, the engine will be launched.
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