Reversing is a common action in driving, and it is also a link that is prone to accidents. In order to improve the safety and convenience of reversing, many cars are equipped with auxiliary equipment such as reversing sensors or reversing cameras. So, what's the difference between the two devices? What are the advantages and disadvantages of each? How should we choose? Today, let's take a look at this topic together.
Reversing radar, as the name suggests, is to use the principle of radar to detect obstacles behind the car. It consists of parts such as an ultrasonic sensor (commonly known as a probe), a controller, and a display (or buzzer). When the reverse gear is engaged, the sensor will emit ultrasonic waves to the rear, and then receive the reflected signal, and judge the distance and position of the obstacle by calculating the time difference and strength of the signal. The display displays the distance numerically or graphically, and the buzzer makes a sound at different frequencies and volumes to alert the driver.
Reversing image, also known as parking assist system, or reversing visual system, vehicle monitoring system, etc. It does this using a camera and a display. When reverse gear is engaged, the high-definition camera at the rear of the car is automatically turned on, transmitting the image from the rear of the car to the display in real time, so that the driver can intuitively see the road conditions behind him. Some advanced reversing camera systems also add auxiliary or grid lines to the image to help the driver determine direction and distance.
Reversing radar and reversing image have their own advantages and disadvantages, and we can compare them from the following aspects:
Accuracy: The advantage of the reversing sensor is that it can accurately measure the distance of the obstacle, while the advantage of the reversing camera is that it can clearly show the shape and size of the obstacle. However, the disadvantage of the reversing radar is that it cannot detect objects below the height of the probe, such as children, small animals, ditches, etc., and the disadvantage of the reversing image is that its image will be distorted due to the distortion of the wide-angle lens, resulting in the driver's misjudgment of the position and distance of the object.
Adaptability: The advantage of the reversing radar is that it is not affected by light and climate, whether it is day or night, whether it is sunny or rainy, it works properly. The advantage of the reversing camera is that it can adapt to different reversing scenarios, whether it is a narrow parking space or a complex traffic environment, it can provide a full range of perspectives. However, the disadvantage of the reversing radar is that it has a limited detection range and can only cover a certain angle behind the car, while the disadvantage of the reversing image is that its image quality is affected by the cleanliness and resolution of the camera, and if the camera is disturbed by dirt, rain, or other interference, it may affect the clarity and visibility of the image.
*: The advantage of reversing radar is that it is relatively cheap, generally around a few hundred yuan, and the advantage of reversing image is that it is more functional, and can generally be integrated with navigation, entertainment and other systems to improve the level of intelligence in the car. However, the disadvantage of the reversing radar is that its installation needs to be punched, which may affect the aesthetics and integrity of the body, and the disadvantage of the reversing image is that it is relatively expensive, generally around a few thousand yuan.
Based on the above comparison, we can draw the following selection suggestions:
If you're on a budget, or if you're experienced in driving, you can opt for a reversing sensor, which can meet your basic needs, as long as you pay attention to the sound and cooperate with the mirror, you can safely complete the reversing maneuver.
If you have a good budget or you don't have enough driving experience, you can opt for the reversing camera, which can provide you with more information, as long as you pay attention to the image and follow the guide line, you can easily complete the reversing action.
If you want more safety and convenience, or if your car is equipped with both devices, you can choose a combination of reversing sensors and reversing cameras, which complement each other's strengths and weaknesses, allowing you to hear both the sound and the image when reversing for the best results.
In short, reversing radar and reversing image are both auxiliary equipment for reversing, they have their own advantages and disadvantages, and we should choose according to our needs and preferences. Of course, no matter which equipment we choose, we cannot rely on them completely, but we must be vigilant and pay attention to the situation around us to ensure the safety and smoothness of reversing.
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