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Reverse sensor range positioning method and system for assisting parking

A technology of reversing radar and parking assistance, which is applied in radio wave measurement systems, measurement devices, and re-radiation, etc., can solve problems such as easy false alarms, and achieve the effect of avoiding misjudgments and facilitating intuitive prompts.

Active Publication Date: 2010-11-17
HANGZHOU AUTOMOTIVE TECH CO LTD
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  • Abstract
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Problems solved by technology

Along with the application and popularization of reversing radar, automobile reversing radar control technology and ranging algorithm also have relatively big development, for example: develop into public number: CN101078770A, the control strategy that a radar probe transmits ultrasonic wave adjacent probe to receive echo at the same time, just A new method of receiving by several probes at the same time was proposed; we conducted a large number of real vehicle tests and found that this method is prone to false alarms. The reason is that the obstacles at the rear of the vehicle body are not regular single or several obstacles objects, but a combination of multiple obstacles of different shapes
Therefore, when using our existing mathematical model to analyze and calculate obstacles, and the shape and number of obstacles are uncertain, it cannot meet the actual needs and is prone to false alarms

Method used

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  • Reverse sensor range positioning method and system for assisting parking
  • Reverse sensor range positioning method and system for assisting parking
  • Reverse sensor range positioning method and system for assisting parking

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Embodiment Construction

[0030] The present invention will be further explained below in conjunction with the drawings and embodiments:

[0031] 1) Such as figure 1 Divide the detection area longitudinally to represent the distance level, and then divide it horizontally into 72 rectangular areas to establish a mathematical model;

[0032] 2) Then establish a judgment model based on the specific distance level of a specific area; and store the relevant parameters of the model in the electronic control unit.

[0033] Specific steps are as follows:

[0034] ① Establish an ellipse model with two probes A and C as the focal point: take point A and point C as the focal point, and draw an ellipse so that the sum of the distances between points A and C is 2c. The two short sides of the rectangle each have an intersection, and the distance from this intersection to the distal focus C is d, such as d=581.55mm; the parameter d is stored in the electronic control unit software. This elliptical area is used to determine ...

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Abstract

The invention relates to a reverse sensor range positioning method and a reverse sensor range positioning system for as assisting parkin. The method comprises the following steps of: performing matrix division on a detected area by establishing a mathematic model; establishing a decision model of each range grade in each detected area; externally calculating a judgment parameter of each matrix, and saving the judgment parameter in a calculation unit, or calculating the judgment parameter in real time by the calculation unit, wherein the judgment parameter is used for judging whether barriers exist in the matrix area or not. The method and the system have the advantages that: 1, the method and the system are applied to a plurality of barriers or barriers with special shapes in actual situations so as to avoid misjudgment; and 2, the detected area is divided horizontally, and the range grade is divided vertically to form the matrix, so that the position of the barrier can be clearly indicated, and is conveniently outputted to a prompt system, a video display and a sound alarm for visual prompt.

Description

Technical field [0001] The invention relates to a reversing radar ranging and positioning method and a system thereof, in particular to a reversing radar ranging and positioning method and a system thereof capable of accurately simultaneously detecting multiple obstacles and odd-shaped obstacles. Background technique [0002] At present, more and more cars are equipped with reversing radar system, which makes the driver safer and more convenient when driving or parking. With the application and popularization of reversing radar, the control technology and ranging algorithm of reversing radar have also been greatly developed. For example, it has developed into a public number: CN101078770A. A radar probe transmits ultrasonic waves and adjacent probes receive echoes at the same time. A new method of receiving by several probes at the same time is proposed; for this, we have conducted a lot of real vehicle tests and found that this method is prone to false alarms. The reason is that...

Claims

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Application Information

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IPC IPC(8): G01S15/93G01S15/08
Inventor 柴世军王晨希李大伟冯奇
Owner HANGZHOU AUTOMOTIVE TECH CO LTD
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