Another Manufacturer Exhibits FMCW Lidar, From PPT To Samples

Moore Core Display Car FMCW Lidar Lark

nowYear6Month, Moorekuang showed the car in China for the first timeloadFMCWLaserReachLARK, This laser radar parameter has reached the eyesforwardToFThe mainstream level of lidar, the highest ranging ability can beReach200m@10%Reflective rate, supporthave120The vertical resolution of the line, the angle of the field of viewfor120°x25°, at the same time the whole machine heightonly54mm。

LARKIt is a silicon light chip based on the self -developed Moore core. It integrates hundreds of optical devices on a single chip. It integrates multi -channel launch, receiving, and FMCW signal processing functions to a chip.

In addition, LARK also supports functions similar to focusing, and can achieve the equivalent of more than 600 lines for static objects.

Due to the use of FMCW ranging technology, LARK can directly obtain the speed information of the target object, with its dynamic instantaneous instant recognition ability, high -precision detection performance, image -level multi -frame superposition, and native all -weather anti -interference advantages.The field performance is dazzling, such as improving the functions of the AEB system in the L3 high -end intelligent driving solution and the functions of cities and high -speed NOA, suitable for robot navigation and obstacles, road collection, low -altitude economy and other directions

OpposeAtFMCWFor laser radar, the core part is the silicon light module.Moore Core also shows two silicon light modules for independent designs and packaging tests.middleFMCWThe optical module highly integrates silicon photon chips, function circuits, and integrated packaging of photoelectric interfaces; the multi -road transmission and ranging signal of the FMCW signal is realized;Another all -solid silicon beam scan module has 4,096 (4K) -8,192 (8K) antenna and a 120 ° × 25 ° viewing angle.

Lidar Ultimate Plan

FMCWLidar is regarded as the ultimate form of future lidar.Lidar radar currently sold in the market basically uses TOF ranging.TOF is also the flight time. The time difference between the laser and the echo signal is directly measured by the time difference between the laser and the echo signal. The detection accuracy is high and the response speed is fast.This is also the most widely used in market applications.

Generally, lidar consists of three core structures of launching, receiving, and scanning, and then controls the parts of the three core structures through signal control and processing modules, and processes the obtained information.However, long -distance TOF Lidar scanning mechanisms are generally existed in activity components, which will affect the life and reliability of laser radar.Therefore, in the future, laser radar will inevitably develop in solid state, that is, completely abandon mechanical or activity components.

The FMCW ranging technology uses a laser beam with continuous changing frequency for distance measurement.Specifically, after the laser beam is launched, two parts are divided into two parts: some are used as reference light, and the other part continues to launch forward.Then, the frequency detection technology is used to measure the frequency between the echo signal and the reference light, thereby indirectly to calculate the distance between the subject.

Thanks to the Doppler effect, when the FMCW ranging method is adopted, the lidar is used as a reference. If the measured object is far away from the lidar, the light frequency of the reflection will be reduced; if the object is approaching, the light reflects the light.The frequency will rise.By capturing this frequency change, we can calculate the current speed of the measured object.This is the basic principle of FMCW ranging.

In the FMCW lidar system, the launch and receiving functions depend on silicon optical chips, which is similar to optical communication products.Compared with the traditional silicon -based integrated circuit chip, silicon optical chips can not only conduct electricity, but also be used as transmission media for optical communication.The chipization of core components also allows FMCW lidar to meet the needs of full solid and small size.

So since 2018, many laser -radar startups have begun to pay attention to and put into research and development of FMCW technology.One of the reasons for this trend is that the FMCW lidar is very dependent on silicon optical technology, and the silicon optical process began to mature around 2018.In addition, TOF Lidar technology was relatively mature at the time, which also prompted startups to choose to explore new technical paths.

FMCWLidar from PPT to sample

In the past few years, FMCWLaser radar has new products from time to time, but for the industry, the problem is that it is only difficult to obtain a sample or not to see the prototype as an end user.Mooreson indicates that as long as there is a demand, it can be 24Take a prototype to the door within an hour.

Actually this year 1Moon CES 2024On the top, many manufacturers exhibited FMCWLidar products and chips, including AEVA4DLidar AEVA Atlas、SiLCEyeonic miniAnd Eyeonic、OmmatidiaLaunched bySeries FMCWLidar radar, etc.

In China, Guangxun Technology also announced earlier that it can provide 1550Nm FMCW BPD(Optical balance detector), 1550Nm FMCW ICRInfraredFilter), 1550nm FMCW silicon light and photoelectric seal module and other underlying device.

Luowei Technology reached a technical cooperation agreement with Great Wall Motors last year. The two parties used FMCW4D laser radar products for urban NOH application scenarios. High -level intelligent driving perception technology and application scenarios exploration and applications launched in -depth cooperation.Luowei Technology is the first domestic laser radar manufacturer based on self -developed silicon optical OPA and FMCW chips. It launched samples as early as 2021.

Radima Smart previously stated that FMCW 4D imaging lidar products will be launched in 2024.

Of course, at present, the two major domestic laser radar faucets, Hesai Technology and Sagitan Junchuang have also lay out in the field of FMCW Lidar, but the current progress is relatively low -key, and there is no detailed information.

summary:

FMCWThe industrialization of lidar still takes some time.But the good news is that in the past two yearsAtAIThe fire of the industry has driven new technological innovation such as data center interconnection, of which Light InterconnectionwaitNew technologies require the participation of silicon optical technology. The maturity of the silicon light process will be further accelerated under the demand driven. This may also drive the development speed of the FMCW laser radar that also needs to be supported by the silicon optical process.