Detection device and detection method of car ultrasonic blind area for preventing ground measuring error and misinformation

The technology of a detection device and a detection method, which is applied in the direction of measuring devices, sound wave re-radiation, vehicle components, etc., can solve the problem of long detection distance of the second sensor 20, false detection and false alarm of the second sensor 20 on the ground, and inability to cover the visible area To improve the long-distance detection ability, prevent false detection and false alarm, and ensure the detection performance

Inactive Publication Date: 2017-01-11
陈武强
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  • Abstract
  • Description
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Problems solved by technology

In the CN104442812A scheme, in practical application, such a large detection distance (range) before and after the side road has reached the coverage limit of the two sensor detection devices, and the device can no longer detect the visual area SQ2 or more at a distance of 7-9 meters behind the car. This is the first problem that the CN104442812A scheme exists. At the same time, the second sensor 20 of the CN104442812A scheme has a long detection distance, reaching 4-6 meters. , the second sensor 20 has ground misdetection and false alarms, which is the second problem of the CN104442812A scheme; so there is no mature ultrasonic blind spot monitoring system with a range of 4-6 meters on the market

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  • Detection device and detection method of car ultrasonic blind area for preventing ground measuring error and misinformation
  • Detection device and detection method of car ultrasonic blind area for preventing ground measuring error and misinformation
  • Detection device and detection method of car ultrasonic blind area for preventing ground measuring error and misinformation

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Embodiment 1

[0067] Embodiment 1: Ultrasonic detection device SZ is provided with two ultrasonic sensors S1, S2 to illustrate the detection device of the present invention.

[0068] Figure 10 It is a schematic diagram of the original detection of the opposite side lane of the detection device SZ with two ultrasonic sensors. The detection distance of each ultrasonic sensor is different. degrees, the angle γ1 with the longitudinal centerline of the car is 70-90 degrees; the remote long-distance ultrasonic sensor S2, the detection distance L2 of S2 is 4-6 meters, the detection angle β2 is 20-40 degrees, and the angle with the longitudinal centerline of the car γ2 is 20-40 degrees.

[0069] The detection distance of the ultrasonic sensor S1 is 3-4 meters, and the detection distance is short, so there is no false detection and false alarm on the ground in the whole process; the detection distance of the ultrasonic sensor S2 is 4-6 meters, the detection distance is relatively long, and there a...

Embodiment 2

[0070] Embodiment 2: Ultrasonic detection device SZ is provided with three ultrasonic sensors S1, S2, S3 to illustrate the detection device of the present invention.

[0071] Figure 14 It is a schematic diagram of the original detection of the opposite side lane of the detection device SZ with three ultrasonic sensors. The detection distances of each ultrasonic sensor are different. degrees, the angle γ1 with the longitudinal centerline of the car is 70-90 degrees; the remote long-distance ultrasonic sensor S2, the detection distance L2 of S2 is 4-6 meters, the detection angle β2 is 20-40 degrees, and the angle with the longitudinal centerline of the car γ2 is 20-40 degrees; the farthest long-distance ultrasonic sensor S3, the detection distance L3 of S3 is 7-9 meters, the detection angle β3 is 15-25 degrees, and the angle γ3 with the longitudinal centerline of the vehicle is 15-25 degrees.

[0072] The detection distance of the ultrasonic sensor S1 is 3-4 meters, the detect...

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Abstract

The invention discloses a detection device and detection method of car ultrasonic blind area for preventing ground measuring error and misinformation which consists of several ultrasonic sensors. Every ultrasonic sensor is arranged in a certain angle with the longitudinal center line of the vehicle. The set angle of detection direction space in every ultrasonic sensor corresponds respectively to different directions from far to near inside road blind area. The detection distance of every ultrasonic sensor is different, and the detection distance decreases gradually from far to near inside road blind area. By shielding the error signal of every ultrasonic sensor to the ground and extracting useful signals from every ultrasonic sensor detection, continuous and remote detection signals from near to far are combined. A larger coverage can be provided to cover the visible area belonging to the rear mirror blind spot and blind area outside the car side. The invention can provide a more appropriate and lager coverage for the visual area of the rear end of the blind area and the rear end of the blind area at vehicle side. And the invention ensures effectively the detection performance of the blind spot detection system.

Description

technical field [0001] The invention belongs to the field of automobile electronic equipment, and in particular relates to an automobile ultrasonic blind spot detection device and a detection method for preventing ground false detection and false alarm. Background technique [0002] The application of ultrasonic sensors in automobiles is becoming more and more popular. For example, the commonly known reversing radar in the car, that is, the front and rear parking assistance system, detects the surrounding environment of the front and rear of the car through the ultrasonic sensors arranged in the rear and front of the car. To identify objects and eliminate blind spots, ultrasonic detection technology is used, and the sensors used are ultrasonic sensors. [0003] At present, the newly added semi-automatic parking system or automatic parking system (hereinafter collectively referred to as automatic parking system) on the car also detects the surrounding environment through ultr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60R16/023G01S15/93G01S15/08G01S15/931
CPCB60R16/0232G01S15/08G01S15/931G01S2015/937B60R16/023G01S15/93G01S15/87B60W30/06B60W2420/54G01S2015/938
Inventor 陈武强
Owner 陈武强
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