From the perspective of the development of the entire millimeter wave radar industry, no matter the system or the device, the core technology is still in the hands of enterprises, such as Bosch, Continental, Delphi, etc. in the system field, Freescale, Infineon, STMicroelectronics, etc. . However, some millimeter-wave radar-related companies have also emerged in recent years, accelerating the development of the industry. Some experts believe that compared to the fierce competition in the camera field, millimeter-wave radar is more innovative, and the potential laser pointer market has more space and more opportunities. In particular, 77GHz is expected to become the mainstream of millimeter-wave radar in the future. Accelerating the development of domestic 77GHZ millimeter-wave radar chips and applying them as soon as possible on the vehicle will be an opportunity for the automotive millimeter-wave radar industry.
In Tesla’s Autopilot system, in addition to millimeter-wave radar, in fact, ultrasonic radar is also used. It is understood that in the self-driving assistance kit equipped by Tesla, three sensors are used: camera, ultrasonic radar and millimeter wave radar. Among them, ultrasound is mainly used for parking ranging, auxiliary braking, etc., and has a short range.
When using ultrasonic radar to measure distance, the ultrasonic transmitter first sends out an ultrasonic signal in a certain direction outside, and starts timing at the time when the green laser pointer transmits the ultrasonic wave. The ultrasonic wave is transmitted through the air, and it will immediately reflect when it encounters an obstacle during the transmission Back, the ultrasonic receiver immediately stopped timing when it received the reflected wave. The timer can measure the distance from the launch point to the obstacle by recording the time.