From zero to one, MEMS laser radar of the car regulation

As the high-end automatic driving function above L2 enters the mass production period, the laser radar has become a industry consensus.

At present, new and old players on the market gathered, and all kinds of technical routes are complex, mechanical, mixed solid, MEMS, FMCW, Flash and other products.

Among them, the product of the MEMS technology route is rapidly warming.

MEMS is full of Micro-Electro-Mechanical System, which is also a microelectromechanical system.

This micro-system based on a semiconductor process makes small-sized, lightweight, and large-scale manufacturing of laser radar.

In the founder of scientific and technological, CEO stone dragonfly, MEMS laser radar will become mainstream products in the market, seize more than half of the market share.

A laser radar team, which is committed to MEMS route, brought two products in the US CES exhibition at the beginning of this year:

ML-30S: a large-view field angle MEMS solid state laser radar facing short-distance application scene, the angle of view of 140 ° × 70 °, the equivalent line beam is 160 lines, the angle resolution is less than 0.5 °.

ML-X: Long-distance applications, can provide high-end ultra-high resolution three-dimensional imaging products with high measurement accuracy of 200 meters of low ant object, with a super-high resolution of 0.1 °.

Currently, the MEMS laser radar in a field technology is in many key segments, such as:

Commercial vehicles, passenger cars, Robotaxi and AGV robots, realized the industry, and got a fixed order of the relevant header and the main plant.

Customer cooperation with disclosure disclosure of science and technology, including:

A new generation of Robotaxi schemes published by Air Driving Truck Applications, as well as the new generation of Robotaxi programs released in November last year.

In order to meet the growing demand for laser radar on laser radar, a diameter of technology has been in Changshu 5,000 square meters in Changshu Laser radar production base, and the planning capacity of factory production line is 50,000 units.

At the same time, a diameter indicates that the production line will further automate and upgrade to increase production consistency and efficiency.

1, the prelude of laser radar large-scale online

Among the 100-laser radar companies in the world, there are very few manufacturers of car laser radar products in mature commercial applications. Only a few can provide, the most important law, the most important method of mechanically transferred laser radar. Reo.

It is representative in the new player, which is the first LUMINAR of the new Global laser radar market value, the headquarters located in INNOVIZ in Israel.

The former’s product is a mixed solid laser radar, which provides MEMS laser radar.

Currently, domestic laser radar suppliers who have taken mass production orders mainly include Innovusion, Livox, a path technology, Huawei.

Innovusion bet mixed solid state laser radar, currently locked the mass production order on ET7.

The company incubation of Livox with Xiaopeng, which is the new forces of the car, will realize the premium production in the third model of Xiaopeng, carrying the product as a custom-made Horiz.

The mass production of Huawei laser radar is currently the Arcfox of Beiqi, the first mount model is HBT.

On the technical route, domestic manufacturers (such as Huawei, Hai, Livox) use mixed solid state laser radar routes.

Among them, Huawei and Innovusion are equipped with mechanical transfer laser radar, and Livox uses a special rotating prism scheme.

A path of technology is a practitioner of MEMS laser radar route.

From the beginning of the founding to now three years, this company tightly aims to the full solid MEMS laser radar technology route, self-research chip, self-construction plant, release the industry’s first MEMS machine solution, gradually take the head Car Enterprise Order.

It is also similar to a technology company that continues to open up in the road of solid-state laser radar commercialization, so that the dream of laser radar car is in reality.

Before further expand, we need to clarify a concept, whether the MEMS laser radar is solid-state laser radar?

In a field of technology, the silicon-based MEMS device is implemented based on a mature semiconductor preparation process, which distinguishes it to the traditional metal mechanical structural components (motor, rotor, etc.), which can bring costs with mass production significantly reduce.

At the same time, the high reliability of the MEMS laser radar can meet the demanding car regulations, especially in mechanical vibration, impact and life, far better than mechanical laser radar.

From two dimensions of cost and reliability, MEMS laser radar is fully compliant with the requirements of car companies on the vehicle rule, and can also be done at cost.

And these two points are the problem of mechanical laser radar difficult to overcome. Therefore, a radiotechnology believes that the product of the MEMS route can be classified into solid laser radar.

From the mass production, from 2017, the main plant first chooses the mechanical laser radar for mass production, because the optional car grade product at the time is only a SCALA of Fareo, equipped with Scala The model is mainly targeted is the automatic auxiliary driving application of the L2.

Since this year, the mechanical transfer laser thunder is one of the red categories by using the Dongfeng of Type of models such as ET7 and Xiaopeng P5.

In the future, solid-state laser radar will become mainstream products, and many companies are also developing around this track, MEMS is one of the most important technical routes.

The advantage of MEMS technology is:

The chip is very flexible for the control of the laser radar launching optical path, and the rapid scan of the laser radar harness can be realized, and its equivalent harness can easily break through the one hundred and even two hundred lines;

The MEMS laser radar does not contain mechanical rotating shafts, thereby avoiding the use of life problems caused by metal fatigue in mechanical laser radar, and the failure of ultra-high speed bearing under vibration and impact conditions.

However, MEMS also has its limitations, that is, the core structure of MEMS devices is a small scale of cantilever beam structures.

If the chip design or device selection is not appropriate, it will cause superior vibration and impact reliability by innovative system design and chip design because of the external vibration or impact.

In view, in the current market, MEMS has strong advantages in cost, reliability, and mass production, so it is a key track that is selected by companies such as technology.

2, how can a radiote technology kill the rear?

In November 2017, a path of technology was established.

Since the founding team has started working in MEMS laser radar engineering in 2012, there is a deep research and development foundation on photoclasses and ASIC chips.

At the same time, the team has a profound understanding of the mainstream laser radar technology route, especially the reliability-related data.

In 2017, the founding team saw that the automatic driving of the laser thundermate, the reliability and landing time, through the preliminary research and preparation work, the company decided to choose the MEMS laser radar technology route.

At that time, domestic laser radar entrepreneurial companies mainly selected mechanical laser radar routes, on the one hand, there were mature cases to be drawn, and the supply chain resources were relatively rich on the other hand.

However, it is relatively blank for MEMS laser radar.

First, from the system design level, it is necessary to have two challenges in front of the upper layer of chipping scheme, optical system, hardware design, and the upper signal processing.

It is required to develop the R & D team from zero to one, while also need to develop, drive supply chain to support MEMS laser radar systems.

In addition, since the aurarism technology team also focuses on the commercial landing speed of the product, in addition to paying attention to the performance of the product, pay attention to the performance of the product and the functions of various types of laser radar, such as dirt detection, resistance Interference, sunshine noise suppression, car Ethernet, etc.

Based on this, the R & D team of the radial technology spent a lot of effort in laser radar signal processing and function development.

In January 2019, the laser radar product of a radial technology was first logged in to the CES exhibition, and the first ML series MEMS laser radar was released.

The next year’s CES exhibition, a field of technology has released the world’s first MEMS laser radar of the MEMS laser radar in the world, especially the world’s first super wide-angled MEMS laser radar ML-30S.

From the first product to the main factory order, the radiotechnology is only used for three years.

This is benefited from the MEMS laser radar compared to mechanical laser radar more in line with the car regulatory requirements, and more benefits to the accumulation of key links such as photoelectric chip self-research and laser radar system design.

Compared with other MEMS laser radar vendors, there are two main features in technology:

A magnetic technology decouptes the transmitting end and receiving end of MEMS laser radar:

The practice is that the APD + ASIC array chip is received by the self-research core, so that the APD chip of the receiving end can be perfectly adapted to adapt the corresponding receiving optical system, equivalent to increasing the receiving aperture, thereby obtaining a stronger optical signal.

The system design level, for different application scenarios, a path technology adopts different light source programs.

For short applications, 905 nm schemes are employed, while in the long-range applications, a 1550 nm laser source with a higher peak power is achieved, and the probe of further distance is achieved under the premise of human eye safety.

According to the official information of a path:

ML-30S can provide a large-view field angle of 140 ° X70 °, 70 ° large vertical field of view, can greatly increase the field of view of the vehicle, providing a wide range of 3D perceptual 3D perception, blind spheres around the body The risk factor is lowered. ML-X can provide a detection of high measurement accuracy up to 200 meters, and the angular resolution is 0.1 °.

Ultra-high detection is a high-resolution stereoscopic imaging capability that provides reliable security for high-speed intelligent driving vehicles.

It is one of the characteristics of a radioped scientific laser radar scheme for a short-range scene and a long-range high-speed scene.

If compared with existing products in the industry:

The ML-30S level is 140 °, 70 ° vertical angle of view, to achieve 360 ​​degrees coverage, require 3 to 6 laser radar.

Compared to other laser radar schemes on the market, at least 5 to 8 laser radar can achieve equivalent level coverage.

In addition, the ML-30S is more obvious on the coverage of vertical viewing angles.

3, go to the road to mass production

The key step before the product is on the car is to meet the requirements of the car.

A permity of the sample research and development phase at the beginning of its establishment is fully considered.

From the MEMS mechanical impact experiment, its device can withstand 1000g impact.

In extreme high and low temperature environment tests, the angular deviation can be achieved within 0.1 °.

Shi Duo tells the heart of the car. There is not much way to take much in the engineering development stage. It is necessary to design the laser radar system program, and also take into account system-level development, including hardware system, algorithm system robust, anti-vibration impact, and Suitable simulation verification of the effects of optical systems under high and low temperature.

In terms of production and construction, a path of science and technology often launches operation at the end of 2019. The first phase of the annual production capacity planned 50,000 units, which can meet the production capacity requirements of 2020 to 2022.

By 2022, there will be a further expansion plan.

Phase I factory plan 50,000 units is based on the design and increasing design of the current automation system, and will further improve automation efficiency and achieve greater capacity.

The first phase is realized is calibration, and the entire production calibration link can be operated one-click.

The second phase is to do is the automation of production assembly.

From the rhythm of the entire product, the initial customers of the radiote technology are mainly driving for L4.

The most introduced ML-30S is a typical product-oriented product-oriented product, mainly to meet the surrounding and blind spots.

Later, the ML-X main long distance, mainly facing the automatic driving system of L2.

Stone Du said that “In 2020, on the one hand, the L4-level automatic driving customer is very fast in promoting MEMS laser radar.

On the other hand, the laser radar planning in the second half of 2020 is also accelerated, which is much higher than the expected expectation of the previous production time to L3 mass production. In my opinion, there are a lot of mass production projects in 2021, and there will be more production models with laser radar in 2022. “

At the moment, the new forces of the car, Xiaopeng, ideal, etc., as well as Beiqi Arcfox, Great Wall, and Chang’an have laser radar on boarding planning.

In the face of this trend, the radial technology program does SOP mass production of the laser radar to L3 automatic driving at the end of 2021.

Shi Tu believes that the entire market will eventually choose the product that is really capable of mass production, MEMS laser radar can live in the cost and reliability.

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