Another Manufacturer Exhibits FMCW Lidar, From PPT To Samples

When mass production has become the key to the success of the lidar company, the TOF ranging as a more mature solution has naturally become the mainstream.However, FMCW is regarded as the technical route of future lidar, and major manufacturers are actually continuously invested in development. There are also many startups ALL in FMCW, and some samples have been launched.

Moore Core Display Car FMCW Lidar Lark

June this year,Moore Core lightSecond-rateIn China, the vehicle FMCW Lidar Lark is displayed. This lidar parameter has reached the mainstream level of the current TOF lidar. The ranging capacity can reach up to 200m@10%reflectivity, vertical resolution with 120 lines, and viewing angle as the field of viewing.120 ° X25 °, at the same time the whole machine is only 54mm.

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

For the FMCW laser radar, the core part is the silicon light module.Moore Core also showed two silicon light modules for independent designs and packaging tests. Among them, the FMCW optical module highly integrated the integrated packaging of silicon photon chips, function circuits, and photoelectric interfaces.Recycling from signal; completion of high -efficiency and low noise signal conversion.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.ToFThat is, the flight time is directly calculated by the time difference between laser and echo signals. The detection accuracy is high and the response speed is fast.This is also the most widely used in the current market application。

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.But long -distance TOFLaser radar 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, FMCW Lidar has been launched from time to time, but for the industry, the problem is that it is difficult to obtain samples or not to see the prototype as end users.Moore Cordon said that as long as there is a demand, you can bring a sample machine to the door within 24 hours.

ActuallyYear1moonofCES 2024There are also many manufacturers exhibitedBeFMCWLidar products and chips, bags, bagsincludeAevaof4DLaserReachAeva Atlas、SiLCofEyeonic MiniandEyeonic、Ommatidiaroll outofANTTieListFMCWLidar radar, etc.。

In China, Guangxun Technology also announced earlier that it can provide 1550Nm FMCW BPD(Optical balance detector), 1550Nm FMCW ICR (infrared filter), 1550Nm FMCW silicon optical and photoelectric seal module and other under -level devices.

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.However, the good news is that in the past two years, due to the fire in the AI industry, the data center interconnection has been drivenNew technological innovation, of which new techniques such as light interconnectionSurgeryThe participation of the silicon optical process will be further accelerated by the maturity of the silicon light process under the demand. This may also drive the development speed of the FMCW laser radar that is also required to support the silicon optical technology support in another dimension.