Backing radar installations automatically correcting sensory element scanning area and method thereof

Abstract

The invention relates to a reverse radar apparatus which automatically revises the scanning area of a sensor and a method thereof. The apparatus of the invention mainly comprises a central processing unit, a memory unit, an ultrasound emission and receiving module, a signal amplifying module and a caution module, wherein, the central processing unit is provided with default compensation value and critical distance in advance. The surrounding status is firstly recorded as initial sensing value when the reverse radar apparatus is started, and then the initial sensing value is compared with subsequent sensing value recorded by sensing the surrounding status when in reversion, if the subsequent sensing value is more than the sum of the initial sensing value and the compensation value, whether the actual distance between the barrier and the ultrasound sensors arranged at both sides of the car rear is larger than the critical distance is judged, and if the actual distance is larger, the compensation value is increased, so the reversion radar can sense the existence of barriers when barriers are closer to the ultrasound sensor, thus reducing the sensitivity of ultra sensors arranged at both sides of the car rear, and achieving the goal of avoiding the misoperation of reverse radar.

Description

technical field [0001] The invention relates to a reversing radar, in particular to a reversing radar device capable of automatically revising the scanning range of a sensor and a method for automatically revising the scanning range of the sensor. Background technique [0002] In order to make the driver park more safely and conveniently, most vehicles are now equipped with reversing radar devices to reduce the accidents caused by the difficulty of judging whether there are obstacles behind the driver when parking. The common reversing radar uses ultrasonic The sensor emits ultrasonic waves to the rear of the vehicle, and detects whether there are obstacles behind the vehicle by receiving reflected waves. When the ultrasonic waves encounter obstacles during the traveling process, the ultrasonic waves will be reflected, and the ultrasonic wave The sensor receives it, and then calculates the actual distance between the obstacle and the sensor according to the transmission spee...

AI Technical Summary

Problems solved by technology

[0003] However, the general ultrasonic sensor 32 emits ultrasonic waves in a fan shape (such as Figure 4 shown), rather than a semicircle, so the scanning range of the ultrasonic sensor 32 must appear incomplete in the scanning blind area 320, and if the scope of the above-mentioned scanning blind area 320 is minimized, the ultrasonic sensing must be Device 32 emits supersonic waves (such as Figure 5 shown), only in this way, the ultrasonic sensor 32 may scan an obstacle that is not directly behind the vehicle body due to the large scanning range, and then issue an obstacle warning, causing the driver to misjudge

[0004] In order to solve the above problems, some manufacturers have designed a new ultrasonic sensor, whose outer scanning range is smaller than that of the aforementioned ultrasonic sensor. Objects located on both sides of the car body generate induction; however, two different types of ultrasonic sensors must be installed on one vehicle at the same time, which is not only difficult to install and maintain, but also increases the production cost

[0005] This shows that the above-mentioned existing reversing radar device obviously still has inconvenience and defects in product structure, manufacturing method and use, and needs to be further improved urgently

In order to solve the above-mentioned problems, the relevant manufacturers have tried their best to find a solution, but no suitable design has been developed for a long time, and there is no suitable structure and method for general products and methods to solve the above-mentioned problems. This is obviously a problem that relevant industry players are eager to solve

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