Tell you how to select the backup sensor

Reversing sensor, also known as parking assist system, or backup computer alert system. Typically, parking sensor from the ultrasonic sensor (commonly known as probes), controller and display (or buzzer) and other components. Principle of ultrasonic distance measurement system, under the control of the controller, the ultrasonic emission sensor signals, when the encounter obstacles, the generated echo signal, the sensor receives the echo signal data processing by the controller to determine the obstacle position, distance and issued by the display of other warning signals, timely warning, so do the hearts of drivers reversing the "numbers" to make reversing easier. Parking sensor before the market several brand as much as 20 in price from 34 to one or two hundred thousand dollars, and many owners do not know what to compare and choose. By the author of parking sensor products on the market analysis, prompts the user to choose the six parking sensor notes.

1. Function

More complete functional should have a distance display parking sensor, audible alarm, regional alerts and orientation instructions, some products also have the Power On Self Test function. There is also currently on the market with voice alarm products, the feature gives the feeling is very direct, but the main problems is the alarm hysteresis, so that drivers brake late, the not practical.In accordance with the display is divided into parking sensor with LED display, also called ultrasonic backup sensor, and rearview monitor parking Sensor.
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2. Performance

Performance mainly from the detection range, accuracy, stability and capture target display rate to consider. Detection range, most of the product range of 0.4 ~ 1.5m, a good product can reach 0.35 ~ 2.5m, shown in Figure 2. Wide range of parking sensor reversing always detected ahead of target, and the excessive pursuit of the minimum detection distance is meaningless, because the actual use must be fully considered when the inertia brake factors. Detection accuracy, mainly depends on two aspects: One, display resolution, the general products of 10 cm, while a good product can reach 1 cm; second is to look at measurement error, which shows the distance between the actual distance Error, 10cm diameter pipe can be placed in position around 1m comparison, the good product of measurement error should be less than 3cm. Show stability, is not a good reflector in the barrier case, the ability to consistently capture and stable showing obstacle distance. Capture the target rate, reflecting the parking sensor on the ability to capture moving objects. This is to prevent similar child or a cyclist suddenly from the rear view through the driver caused crashes less important. In short, reversing radar performance requirements are: measured accurately measured stability, range, capture speed.

3. Appearance Technology

As the car inside and outside decorations, displays and sensors installed to consider whether the appearance, and vehicles are coordinated. From the sensor shape, one can choose a button style and fusion of two, button-type sensor surface is flat, the surface of sensor fusion is a shape change, the pursuit of a natural transition with the rear bumper. Judging from the size, there are ultra-small, medium and large size, relatively large size of the atmosphere, relatively small, hidden, depending on the size of the rear bumper and personal preferences. From the color point of view, should be chosen with the vehicles after the bars the same or similar color. Monitors should be based on the driver's parking habits use front-or rear, and in order to clear, beautiful as the standard, some products can use both monitors.

4. Quality and Reliability

Parking sensor as automotive supplies, due to its higher quality and reliability requirements, the average consumer it is difficult to determine the index. Good quality products to provide better services, commitment to OZ and repairing a longer period, it is recommended you select the period of 2 years for repairing the product.


Reference: http://espow-world-electronic-world.blogspot.com/