Detailed explanation of reversing radar terminology[汽车修理知识]

1:Reversing radarOperating temperature
Operating temperature refers to the temperature range within which the reversing radar can work normally. Generally, it should be guaranteed to work stably between minus 10 degrees and minus 50 degrees. Most reversing radars on the market can guarantee this requirement. Generally, a better working temperature range can support minus 50 degrees to minus 80 degrees.BecausecarIt may drive in various climates and weathers, and whether it can work effectively will directly affect driving safety, so the operating temperature range of the reversing radar should be as wide as possible.

2: Parking sensorCameraangle
The camera angle refers to the reversing radar equipped with a camera, and the range that the camera can observe is generally marked by an angle. The large viewing angle of the camera can see more content and a wider range, which is helpful for safety when reversing. The usual camera angle is about 60 to 90 degrees.

3: Display accuracy of reversing radar
Display accuracy refers to the smallest scale that the reversing radar can display on the display device, generally 0.1M (10CM). Generally speaking, the higher the display accuracy of the product, the smaller the measurement error, the more accurate the measurement.

4: Reversing radar alarm volume
The alarm volume is generally expressed in db (decibel: indicates the loudness of the sound), which refers to the maximum volume that a reversing radar sound alarm system can reach when notifying the driver by sound. The alarm volume of the reversing radar is usually around 60-80db, and the high one can reach more than 100dB. If the alarm volume is too small, it will affect the driver's judgment in a noisy environment.
The sounds expressed by different decibels are roughly as follows:

20dB The sound of wind blowing through leaves
30dB whisper
40dB residential area
50dB department store
60dB ordinary human voice
70dB in the driving car
80dB The radio is turned on very loudly
90dB in heavy traffic
100dB subway
110dB thunder
Most people feel uncomfortable with the sound of 120db.

5: Reversing radar alarm distance
The alarm distance is an interval, which indicates the distance the car is the farthest from the obstacle. The alarm distance of the reversing radar is generally 1.5 meters, and the large alarm distance can give the driver more sufficient response time.Because the probe is generally installed inbumperTherefore, the shortest distance is theoretically 0, but it should generally be left about 20 cm. A few ultra-long alarm distances even reach 3 meters, and some brands of reversing radars are not sensitive enough, and the detection distance is only 0.9 meters, which will cause certain difficulties for drivers to judge and take measures.
Because the equipment will inevitably have certain errors, and in different cold and warm environments and weather, the sensitivity of the probe will also be affected to a certain extent. Therefore, qualified users can install a reversing radar with a camera, and you can intuitively see obstacles such as railings that are not easy to detect by the reversing radar through the display. The new reversing radar will even use an infrared camera to avoid the effects of rainy weather and dark night, and can provide you with all-weather guarantee.

6: Reversing radar shows the distance
The display distance refers to the distance range that the display device of the reversing radar can display. Generally between 20CM and 1.5 meters. Generally, the reversing radar will start to display from the farthest detection distance (1.5 meters), and then as the distance of the obstacle approaches, the displayed value will change, but when it is small to a certain extent (20CM), most systems will no longer display The new distance value, or display STOP and other signs indicating that the distance is very close, you should stop immediately. However, some brands of reversing radars are not sensitive enough, and the detection distance is only 0.9-0.2 meters, which will cause certain difficulties for the driver to judge and take measures.

7: Reversing radar measurement error
The measurement error refers to the difference between the obstacle distance measured by the reversing radar and the actual obstacle distance. Here it is generally expressed in centimeters or percentages. Generally, the measurement error of the reversing radar is about 5 cm. Better ones can reach 1 cm. Small measurement error and high accuracy can play a real role in use. If the error is too large, the reversing radar will be meaningless.

8: Reversing radar power
Power refers to the amount of electric energy consumed by the reversing radar when it is working. Generally expressed in watts. The main power consumption of the reversing radar is the host and the display device. The transmission power of the probe is a few milliwatts, which can generally be ignored. The power consumed by the host is generally within a few watts, and the display device varies according to different types, and is generally about a few watts.