Reversing radar has a blind spot. Many people also know it. But in daily driving, can objects that are not in the blind spot be detected?
In real life, parking spaces are difficult to find. What kinds of obstacles are likely to be seen during parking. Can radar be trusted when encountering certain irregular obstacles? Here are some common parking lots in life simulations. Look at the parking sensors. which performed.
How reversing radar works
When reversing, an ultrasonic signal is sent out by the radar probe at the rear. When the signal encounters an obstacle, an echo signal is generated. The vehicle radar controller receives the echo signal and performs data processing to determine the position of the obstacle. At the same time, a prompt is issued. . Although the ultrasonic waves emitted by the radar are diffuse, there are still blind spots in the upper, lower, left, and right positions.
Low concrete pier
Detection effect: ★★★★★
The tall wall can be easily detected by radar , but can low obstacles be detected?
When the reversing radar alarm occurs at a distance of more than one meter from the obstacle, a schematic diagram appears in the reversing image to indicate that the obstacle is found at the far rear side of the vehicle. This is consistent with the position of the actual obstacle, and the low obstacle can be seen. Discovered by reversing radar in time.
Iron fence
Detection effect: ★★★★★
We know that the reversing radar can easily detect the wall, but whether an iron bar consisting of vertical bars can be detected, we have found a fence gate in the community.
When the car is close to the iron gate, the radar starts to alarm when it is more than a meter away from the gate, and the radar map indicates. Continue to approach, the alarm sounds faster. It can be seen that the iron fence reversing radar can promptly discover and give tips.
Snow pile
Detection effect: ★★★☆☆
In the winter, snowfall increases, and the snow in the urban areas is usually cleared into a pile. If it is not a very high level of snow detection, we will continue to experiment. First find a snowdrift on the roadside. The highest spot is 40cm up and down. The shape is conical and not very regular.
Then we reversed near the snowdrift, but there was no warning in the process and we continued to approach and there was still no warning tone. When the rear of the car has covered the edge of the snowplow and is about to hit the highest point, the radar suddenly sounds. From the schematic diagram of the radar in the car, the schematic diagram of the column closest to the car body is already on at this time. It can be seen that the radar is not sensitive to the obstruction of snow drifts, and cannot be detected within the effective distance. When you are prompted, the distance is very close. If you do not pay attention, you may get scratched.
The response of the radar is not sensitive. When it enters the radar coverage area, it cannot be discovered in time. Although the obstacle is eventually detected, the distance is already very close. If the speed is too fast, it is very easy to scrape.
glass
Detection effect: ★★★★☆
We chose a glass plate about 60cm long erected on the ground, reversing close to the glass plate, when the distance from the obstacle more than one meter, the radar began to alarm, the detection is still very sensitive, so we do not worry about the glass door Or the glass wall will not be detected.
Low glass
Detection effect: ☆☆☆☆☆
The height of the glass dropped to about 30cm. We reversed the vehicle near the obstacle, but this time, the radar did not respond. Keeping close to the impending collision with the glass, the radar still has no feedback. It can be seen that for low glass obstructions, the radar can't detect it. Pay special attention to daily parking.
Experiment summary
Through experiments, we can see that vehicle reversing radar is very sensitive to the detection of wall or large-area obstacles. Therefore, during the daily driving process, it is recommended that the vehicle must first be slow when reversing, so even if the radar does not detect obstacles sufficiently Sensitive, it can also respond to a sudden alarm. In addition, radar is just an auxiliary tool for us when we are reversing. Don't rely on it too much. Observe carefully and be cautious. It is the most important thing.
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