General Motors take a step in the layout of automatic driving key technology.
US Time October 9, General Motors announced the acquisition of Strobe - this California's new company, the main low cost solid state laser radar, and hoped to sell this product to less than $ 100.
Although universal did not announce the acquisition details, from this year's Strobe financing plan (only 15 million US dollars only), the general use did not become a big head because of the automatic driving concept. Last year, Uber spent $ 680 million to buy OTTO, and therefore also made a tribunal with Waymo.
Compared with OTTO, General Acquisition Strobe looks definitely a value-for-money sale, this company has only 12 employees, creating only three years. Most importantly, the Frequency-modal "technology it uses is created by the founder Lute Maleki, absolutely will not eat the lawsuit because of patent issues.
FM Lidar: FM Laser Radar
Today, laser radar (main manufacturer is Velodyne and QuaNergy), most of which use flight time (TOF) systems. It judges that the distance is mainly based on a small delay between laser radar signal emission and returning, but such laser radar also has its own soft rib.
If the object is very close to the laser radar, the flight time is particularly short, which affects the spatial data accuracy of the laser radar. At the same time, such laser radar also requires very sensitive photodetectors, and this detector is easily affected by the sun and other light.
Compared to flight time laser radar, Strobe's prototype product (FM Lidar) mainly transmits a linear frequency modulation laser, and only the phase and frequency of returns to the laser, the system can directly obtain the distance and speed of the object peripheral objects. This greatly reduces the calculation load of the "brain" of the vehicle, making it faster. Be
In addition to this advantage, FM Lidar's anti-interference ability is also stronger, and does not require a sensitive photodetector. Of course, it is not easy to create a high quality FM Lidar. However, Maleki has his own trick, he uses the so-called "Wipering Gallery Mode" optical resonator to reduce the laser line width and bring more accurate signals.
In fact, "returning wall" has a similar design in the ancient buildings, including the Forbidden City and London St. Paul's Cathedral, so that even the lightest whisper will also generate resonant sound waves in the church, 40 meters away. People can also understand. The principle is not only valid for the sound, but also valid for the optical wave in the spherical optical resonator.
In the Strobe system, the light from the resonator returns the laser source, but the line width will narrow. Simply adjust the optical properties of the resonator, highly linear FM lasers can be obtained to meet the needs of automatic driving vehicles.
In a blog post, General Cruise Automation wrote: "Strobe chip-level laser radar will greatly enhance the ability of universal automatic cars. But more importantly, make the entire sensor into single-chip, we It can reduce the cost of laser radar by 99%. "
In addition, a picture released from the Strobe official website we can also see that Strobe's laser radar has an advantage in volume, with only 25 cents. Although I want to draw a 360-degree panoramic image around the vehicle requires multiple laser radar, but it seems to be much harmonious compared to the large laser radar that is now driving the test vehicle. Be
Vogt said: "When using, laser radar, camera and radar can make each other, becoming a reliable and powerful induction kit, dealing with different environment and light sources."
Original link: https://www.eeboard.com/news/ai-101/
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