Current Development of 3D Car Wheel Alignment in China

Just past the Beijing International Auto insurance exhibition, almost all of the traditional four wheel alignment manufacturers, regardless of their own production or OEM, are not far behind, have launched their own 3D products, the person in charge of a domestic well-known manufacturers claim that sales last year, 3D locator accounted for two-thirds of the total sales of the positioning system of the enterprise, has gradually given up the meaning of the original traditional products.

However, such sales booming market conditions, product technology and quality in the end in what state, whether the consumer really know the technical performance of the product, and choose to go to their satisfaction with the product? After all, 3D wheel aligner technology is full of modern high-tech new products entering the country is not long, behind the boom, in fact, there are many little-known technology insider, not even for users production of peer-to truly understand. In order to promote our products, technological progress, keep up with the pace of foreign advanced technology to promote the products of the industry long-term stable, healthy and orderly development, publicity and popularize relevant knowledge is obviously very necessary.

A first generation 3D wheel aligner

At present, the 3D locator manufacturers up to three, forty, have claimed that their products are true 3D positioning system, but few manufacturers to truly master the core technology, most of the early products of the just imitation of foreign technology is relatively backward, compared to similar products in developed countries there is not a small gap, if classified according to the production age of the foreign products and technological progress, can be said that domestic products are still in the first generation.

Generation was marked by its core components - industrial camera, such as the United States

Snap-front product uses a 1.3 megapixel camera, inside the camera frame buffer, and continuous shooting with this camera, the serial transmission of image data through the USB port to your computer before a photo data transfer is complete, photographs data one will wash away a part of the data, send photos to your computer data may be before and after photos of the 'hybrid' data, if the vehicle is in motion, before and after the two photos The actual location of the target is non-overlapping, sent back pictures of distorted deformation, can not be used to calculate the spatial coordinates, so the first generation of 3D wheel aligner stationary camera in the specified location. Carts measurement process must be carried out as follows:

⑴ lasted more than 3 seconds to take pictures of the target state of the vehicle is stationary,

⑵ back the cart for some distance

(3) the vehicle is stationary state, the second target for more than 3 seconds to take pictures

⑷ forward trolley vehicle back to the beginning position

Two spatial coordinates of points on the trajectory of the target is calculated by two static camera, and then use these two points, according to the theoretical curve fitting the movement of the target curve used to calculate the relevant parameters of the positioning of the vehicle tires. The advantage of this method is low, software to calculate a simple, low cost of production of cameras and computer hardware requirements. But the disadvantage is obvious, the only two fitting motion curve, with the fitted curve to act as the real motion of the target curve, inevitably based on a series of assumptions, such as:

The ⑴ whole cart process is in an ideal body plane

⑵ whole cart process is not hunting or sliding

⑶ two stationary point shot must be accurate, the vehicle is not shaking

If this assumption is not completely established, the theoretical curve and the actual motion curve consistent

Nature will inevitably bring about the error and poor reproducibility, and even measuring the failure.

Through the above description can be seen, the domestic manufacturers to promote 3D locator is really just shooting in both a stationary position, there is no dynamic measurement can only be regarded as a primary, primitive 3D product in accordance with industry repeatedly emphasized true the 3D extent of the 'true' in the end how much is debatable.

Second, the second generation of 3D wheel aligner

After 10 years of technical development and accumulation, Hunter, SNAP's next-generation platinum version of the product, using the camera and the first generation of considerable change. The main features are:

(1) camera pixel is boosted to 5 million. Advantage is that the image is clear, leaflets available

In the calculation, rather than through continuous shoot lots of pictures to fit in a particular location, so that you can use the pictures taken under the dynamic parameter calculation.

⑵ camera frame buffer. Each picture in the leaflets stored in a memory page,

And a full transfer to your computer. Based on this technique, the target motion the process of continuous camera to transfer photos to your computer will not distortion, and use this to calculate the trajectory of the target point, the curve fitting by dozens of points naturally only by two o'clock curve fitting to be more accurate. And individual shaking, significantly deviated from the normal track points can be effectively weed out, which greatly improves the measurement accuracy, repeatability, and measurement of efficiency and measuring the success rate is much higher.

Just launched new products of the United States Hunter and SNAP representatives of second-generation products, significantly ahead of the technically most of the domestic manufacturers, the most notable feature is the cart and turn the steering wheel did not pause to realize true 3D dynamic measurement, carts or the action of the steering wheel to an end, the measurement data is immediately displayed. In particular, Hunter locator is the most obvious, it only move forward more than 10 cm, did not forward to after the iterative process, before the beam, and extraversion data measurement is completed.

Clearly, the second generation of products has greatly improved due to the underlying hardware, software processing is more advanced, so that positioning the measurement accuracy is improved greatly, the operating process more simple, convenient, and truly on the 3D motion of the vehicle location parameter measurement . Our manufacturers should actively carry out appropriate follow-up, only to maintain innovation cannot be eliminated.

What is gratifying is that the domestic 3D four locator manufacturers, Gao Yi Electronic Technology, after years of hard research, the first in China to grasp the second generation of the 3D wheel aligner technology to produce the 3D car four locator, the core components of industrial cameras completely consistent with the second generation of foreign products, the measurements and the performance indicators can also be fully comparable with foreign products, the production for the automotive warranty industry in China with independent intellectual property rights and reached the highest in the world of high-tech products.