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AR+HUD: Micro-drive System Accelerates the Ecological Layout of Intelligent Transport

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With the development of 5G communication, the automotive industry has entered a turning point era where cars are smarter than before and connected to everything. Interactive car products with a strong sense of technology, such as the head-up display (HUD), are gradually increasing in value.   

Automotive HUD has been part of the automotive field for more than 30 years, but it has always been stagnant. There are very few models with HUD on the market. At present, the price of HUD products is high. For example, it costs about $1400 for BMW to install a HUD. In the case of non-rigid demand, it is not easy to convince people to make purchases. From the perspective of car companies, HUD products have technical difficulties, while development and material costs are also high. In addition, the insufficient capacity will inevitably affect the investment confidence of car companies. As for the HUD itself, the big problem with it is that the on-board display flip device often affects driving safety due to the fact that it is not turned in the right place, the drive does not stop after turning in place, and the turning angle is not sufficient. Although HUD has advantages, it is costly and not essential. Without certain market guidance and education, the value of this product will not be recognized by consumers, and it will be hard to improve the market share.   

To meet the intelligent flipping demand of the head-up display, Shenzhen ZHAOWEI Machinery & Electronics Co., Ltd. (hereinafter referred to as ZHAOWEI) has put forward a head-up display of the flip-screen gearbox solution. By analyzing the structure of the head-up display flip screen, the reversing mechanism of the display screen allows the gear reversing device to form two sets of transmission routes, one of which is the transmission system consisting of the input shaft, the commutator, the forward gear train, and the output gear. The other transmission system is composed of an input shaft, commutator, reverse gear train, and an output gear. When the forward gear train is involved in the transmission, the output gear rotates forward. When the reverse gear is involved in transmission, the output gear is reversed. The output gear steering can be changed through the conversion of the above two sets of transmission routes, in order to avoid damage to the gear due to excessive load, and enable position adjustment of the head-up display. 

Automotive display HUD rotating motor

To meet the requirements of small size and high torque, as well as the transmission torque of the head-up display for easy and intelligent rotation, the HUD transmission structure has two, three, and four-level transmission adjustments. The input speed, torque, and reduction ratio can be adjusted according to the design requirements of the head-up display micro switch motor.  

In order to improve the service life and quality of the head-up display, ZHAOWEI has used kinematics simulation to verify the smoothness and local interference of the gear pair movement during the gearbox design stage. At the same time, finite element analysis technology is used to analyze and check the tooth surface strength of spiral teeth and bevel gears. In addition, ZHAOWEI is able to detect changes in cavity pressure during the injection molding process while using cavity pressure technology to monitor product quality.  In terms of reducing noise, ZHAOWEI has used the gearbox design platform to achieve automatic parameter design of involute planetary gear systems, bevel gears, face gears and other mechanisms. By optimizing gear parameters, such as modification coefficients, tooth coefficients, pressure angles, center distance, etc., ZHAOWEI has decreased the meshing impact speed, and the ratio of the meshing impact speed to meshing impact speed is limited within a certain value range. The gear design method to reduce or mesh the pitch circle impact can meet needs for silent operation (low noise).   

HUD is a complex component that integrates optical design, structural design, and software algorithms. It has a high technical threshold. For many start-up companies, even if these problems are solved, they still need to convince the core customer, the main engine manufacturer from the perspectives of mass production and profitability. Nowadays, more and more manufacturers have invested in this field, and the market potential of HUD is vast. With the advent of electrification and the intelligence of automobiles, the acceptance of the HUD market is continuously improving. Based on the development of artificial intelligence technology, the Internet of Things (IOT) for automobiles is rapidly deepening. HUD is an important window for human-computer interaction with ADAS functions. In addition to visually presenting information about the instrument and the central control screen on the windshield, in the level 3 automatic driving, AR-HUD can give the driver intuitive feedback of information inside and outside the car, such as speed limit reminder, collision warning, ground navigation, etc., effectively alleviating the driver's anxiety about the safety of automatic driving.   

The HUD market is growing rapidly every year. According to the global market research company IHS Markit, the HUD market is expected to grow at an average annual rate of 20%. In the current era of upgrades, the question of how to “travel efficiently” is one that must be solved urgently. Traditional travel methods can no longer meet the needs of the consumers. Under the guidance of the technological revolution and industrial transformation, the transformation of smart mobility has begun. In the future, under the impetus of artificial intelligence and other technologies, AR (augmented reality) HUD will become a new trend in development. HUD has been put high expectations upon the arrival of automobile intelligence. ZHAOWEI plans to contribute to this process by optimizing and adjusting the HUD flip system in terms of micro-drive systems. 

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