Wave transmission performance testing method and device suitable for ACC millimeter wave label

Abstract

The invention belongs to the technical field of exterior trimming parts, and provides a wave transmission performance testing method and device suitable for an ACC millimeter wave label. The device mainly comprises a control computer, pulse radar, a horn antenna, an action control device, a horizontal angle regulator, an inclination angle regulator, an upper position regulator, a lower position regulator, a front position regulator, a rear position regulator, a left position regulator, a right position regulator, a label fixing jig, an angle reflector and a positioning clamp. On the premise ofgreatly reducing the test instrument installation space and the device cost and in the state of each angle combination of products in the horizontal and the inclined directions, for a traditional testing method, the device is simpler, lower in device cost, wider in test area and more comprehensive, and is closer to the use state of the actual vehicle, can perform large-scale testing for the angleerrors between wave transmitting and receiving while testing the wave transmission attenuation, and is more comprehensive and reliable.

Description

technical field [0001] The invention belongs to the technical field of automobile exterior decorations, and in particular relates to a wave-transmitting performance test method and test equipment suitable for ACC millimeter-wave signs. Background technique [0002] ACC (Adaptive cruise control) adaptive cruise control system, in today's electric vehicles and hybrid vehicles, ACC technology is particularly important. During the driving process of the car, ACC continuously senses the road conditions ahead through the radar in front of the car, scans the The vehicle in front, supplemented by the wheel speed sensor on the wheel to feed back the vehicle speed, realizes automatic acceleration and deceleration control to a certain extent. To ensure the best safe distance from the vehicle in front, in the entire ACC adaptive cruise system, the most important application is the millimeter-wave radar (ranging sensor), the feedback data obtained after the millimeter-wave radar scans th...

AI Technical Summary

Problems solved by technology

The two do not match. Although the result can be multiplied by 2 to approximate the two-way value, this method is not accurate; the measurement angle of this method is also single, and it cannot simulate the complex road conditions of real vehicles with multiple angles; its test range It is also single, and can only be tested at a single point. This method actually detects the center position, not a range, and cannot truly simulate the overall range of the radar emission area projected on the vehicle logo (radome), which will bring great benefits to actual use. potential safety hazards; the second two-way single-angle wave transmission test method, the main components of the test equipment are: pulse radar, horn antenna, angular reflector, and the object under test, mainly by the pulse radar to emit radar waves, through the horn antenna towards It is emitted in one direction, then passes through the car logo (radome), is reflected by the corner reflector, passes through the car logo (radome) again from the front, and finally is received by the transmitting area of ​​the horn antenna. This test method The wave penetration is bidirectional, which can simulate the actual use state, but the measurement angle is single, and can only measure a specific angle, and cannot simulate the complex road conditions of real vehicles with multiple angles, and will cause measurement blind spots because the measurement angle does not completely cover the radar range. , causing potential safety hazards, and its test range is also single, located in the middle of the sign, rather than a range, and cannot cover the projected area range of the radar emission area on the radome, resulting in a certain untested blind area, which brings great harm to actual use. Potential safety hazard; the third two-way multi-angle wave transmission test method, the main components of the test equipment are: frequency synthesizer, frequency multiplier, horn antenna, multiple angular reflectors, and the object under test mainly emits radar waves from pulse radar. It is emitted in multiple directions through the horn antenna, and after passing through the car logo (radome), it is reflected by the corresponding angular reflector, and then passes through the car logo (radome) from the front again, and finally by the emission area of ​​the horn antenna. receiving; the wave penetration of this test method is bidirectional and multi-angle, which can simulate the use of multi-angle ranges in actual use, but this method actually requires a very large space to place multiple angular reflectors, and its The angle is fixed and cannot adapt to angle changes

Moreover, this method needs to invest in multiple sets of angular reflectors, aluminum frame guide rails, and wave-absorbing sponges. The cost is high, and the test range is also single. It is in the middle of the sign, not a range, and cannot cover the radar emission area. The range of the projected area on the radome leads to a certain unmeasured blind area, which brings safety hazards to actual use

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