Automobile door opening obstacle avoidance system

Abstract

An automobile door opening obstacle avoidance system comprises a detection sensor and a processing device, and the detection sensor is arranged on the side edge of an automobile door and used for transmitting and receiving ultrasonic waves for detection; and the processing device is vehicle-mounted computing equipment, and issues an instruction to the sensor based on an operation chip, so that the sensor sends waves and receives echo information. According to the automobile door opening obstacle avoidance system, the automobile door can be effectively prevented from being blocked by parallel obstacles in the opening process, detection under special conditions can be achieved only by adding detection module software under the condition that a traditional detection structure and mode are not changed, cost is reduced, and meanwhile use functions are added.

Description

Technical Field

[0001] The invention relates to an automobile door opening obstacle avoidance system. Background Art

[0002] Nowadays, cars are becoming more and more intelligent, and the technology of automatic alarm and detection of vehicles is also keeping pace with the times. In order to provide users with a better operating experience, automatic detection technology is added in multiple usage scenarios to improve the safety performance of vehicle use.

[0003] Common usage scenarios include automatic parking and automatic positioning. Some car models also have automatic door opening and closing. In parking scenarios, due to parking space restrictions, two cars are often positioned close to each other, which will cause the doors to be unable to open normally. Since people in the car cannot observe the situation near the door, it is easy to cause a door opening collision.

[0004] At present, the existing technical solution is to use a door switch and an ultrasonic sensor to achieve door opening and obstacle avoidance. The ultrasonic sensor is used to scan obstacles outside the door. When the detected obstacle is smaller than the set value, the obstacle avoidance information will be transmitted to the door switch, causing the door drive to stop moving, thereby achieving the obstacle avoidance function.

[0005] This method works based on the principle of ultrasonic detection. When the obstacle outside the car door is a flat wall or another vehicle, the angle between the sensor probe and the wall or vehicle will be greater than 45 degrees after it is turned on, resulting in the rebound echo from the ultrasonic wave not being received by the sensor, causing the detection result to be that there is no obstacle, which in turn affects the opening of the car door. Summary of the invention

[0006] To solve the above problems, the purpose of the present invention is to provide a car door opening obstacle avoidance system, which can solve the blind spot of real-time detection when the car door is opened and prevent parallel vehicles or walls from interfering with the opening of the car door.

[0007] The present invention provides a vehicle door opening obstacle avoidance system, comprising a detection sensor and a processing device, wherein the detection sensor is arranged on the side of the vehicle door and is used to transmit and receive ultrasonic waves for detection; the processing device is an on-board computing device, which issues instructions to the sensor based on a computing chip, so that it transmits waves and receives echo information; In the processing device, an automatic detection program is provided, which includes a detection unit, a comparison unit, a standard value unit, a conventional unit and a special unit; wherein the detection unit controls the detection sensor on the vehicle, and uses at least two detection sensors on the door to detect obstacles outside the door, and obtains two sets of detection distances; the comparison unit is connected to the detection unit, receives the two sets of detected data, calculates the data, obtains the absolute value of the difference between the two, and compares the difference with the data in the standard value unit; the standard value unit is connected to the cloud or database to store the standard value of the difference under various scenarios; the conventional unit controls the door switch system, adopts the traditional real-time detection method, and performs real-time detection of the door opening; the special unit is connected to the comparison unit, when the comparison module outputs data that meets the result, the special unit works, and then the conventional unit performs the door opening work while being monitored by the special unit; if the comparison module outputs data that meets the result, the conventional unit works directly; The workflow is as follows: In the first step, the detection unit starts to detect obstacles outside the door; the detection data is obtained, the sensor close to the A column of the vehicle measures the distance data as a; the sensor close to the B column of the vehicle measures the distance data as b, and the data a and b are transmitted to the comparison module; wherein the distance a and b are the shortest distances between the door and the obstacle in real time In the second step, the comparison module calculates the difference between the data a and b, takes the absolute value |ab|, and extracts the comparison standard value s from the standard value unit; compares the size of |ab| with s; Step 3: When |ab|≤s, the comparison module issues a command to the special unit, and the door is opened by the special unit; In the fourth step, the special unit issues a maximum opening angle instruction to the door, and then the conventional unit works. When the door reaches the maximum opening angle, the special unit opens and takes over the conventional unit to stop the door from opening further. Step 5: When |ab|>s, the comparison module issues instructions to the conventional unit to perform door switch operation.

[0008] Furthermore, the detection units are arranged around the vehicle doors, and at least two detection sensors are arranged on each vehicle door.

[0009] Furthermore, when the conventional unit is working, the detection unit is also working, using a sensor to perform real-time detection to determine the door opening action.

[0010] Furthermore, when the special unit is turned on, if the conventional unit detects an obstacle before reaching the maximum opening angle and the door needs to be stopped, the conventional unit is executed; when the door reaches the maximum angle, the door will stop regardless of the detection result of the conventional unit.

[0011] Furthermore, the maximum opening angle is calculated by using the two detected distances a and b and the door width.

[0012] Furthermore, the conventional unit detects obstacles in real time through sensors, and during this process calculates the maximum angle at which the door can be opened, which is different from the maximum opening angle calculated by the special unit. When the special unit is running, the maximum opening angle set by the special unit shall prevail.

[0013] Furthermore, the standard value s and the maximum opening angle are obtained through big data calculations and are applicable to different models of vehicles.

[0014] Compared with the prior art, the automobile door opening obstacle avoidance system provided by the present invention can effectively prevent the door from being blocked by parallel obstacles during the opening process. Traditional sensors cannot identify obstacles during the opening process because they cannot transmit rebounded ultrasonic waves, resulting in obstruction of door opening and affecting consumers' use. Without changing the traditional detection structure and mode, only the detection module software needs to be added to realize the detection of special situations, thereby reducing costs and increasing usage functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram showing a vehicle door opening known in the prior art is shown.

[0016] Figure 2 A system schematic diagram showing a preferred embodiment of the present invention.

[0017] Figure 3 A system flow chart of the present invention is shown.

[0018] Figure 4 The measuring distances a and b of the preferred embodiment of the present invention are shown.

[0019] Among them: 1. Detection unit, 2. Comparison unit, 3. Standard value unit, 4. Conventional unit, 5. Special unit. DETAILED DESCRIPTION

[0020] In order to make the features and advantages of the present invention more clearly understood, preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0021] like Figure 2As shown, it is a car door opening obstacle avoidance system, including a detection unit 1, a comparison unit 2, a standard value unit 3, a conventional unit 4 and a special unit 5; wherein the detection unit 1 is connected to the vehicle-mounted sensor, and at least two sensors on the door detect obstacles outside the door to obtain two sets of detection distances; the comparison unit 2 is connected to the detection unit 1, receives the two sets of detected data, calculates the data, obtains the absolute value of the difference between the two, and compares the difference with the data in the standard value unit 3; the standard value unit 3 is connected to the cloud or vehicle-mounted storage to store the standard value of the difference under various scenarios; the conventional unit 4 is connected to the door switch system, and adopts the traditional real-time detection method to detect the door opening in real time; the special unit 5 is connected to the comparison unit 2, and when the comparison module outputs data that meets the result, the special unit 5 works, and then the conventional unit 4 performs the door opening work; if the comparison module outputs data that meets the result, the conventional unit 4 works directly; like Figure 3 As shown, the workflow is as follows: In the first step, the detection unit 1 starts to detect obstacles outside the vehicle door; the detection data is obtained, and the distance data measured by the sensor close to the vehicle A column is a; the distance data measured by the sensor close to the vehicle B column is b (reference Figure 4 ), transmitting data a and b to the comparison module; In the second step, the comparison module calculates the difference between the data a and b, takes the absolute value |ab|, and extracts the comparison standard value s from the standard value unit 3; compares the size of |ab| with s; Step 3: When |ab|≤s, the comparison module issues a command to the special unit 5, and the door is opened using the special unit 5; In the fourth step, the special unit 5 issues a maximum opening angle instruction to the door, and then the conventional unit 4 works. When the door reaches the maximum opening angle, the special unit 5 opens and takes over the conventional unit 4 to stop the door from opening further. Step 5: When |ab|>s, the comparison module issues an instruction to the conventional unit 4 to perform the door opening and closing operation.

[0022] In one embodiment, the detection unit 1 is arranged around the vehicle door, and each vehicle door is arranged with no less than two detection sensors; when the conventional unit 4 is working, the detection unit 1 also works, using the sensor to perform real-time detection and determine the door opening action; when the special unit 5 is turned on, if the conventional unit 4 detects an obstacle before reaching the maximum opening angle and needs to stop the vehicle door, it is executed according to the conventional unit 4; when the vehicle door reaches the maximum angle, regardless of the detection result of the conventional unit 4, the vehicle door is stopped; the maximum opening angle is calculated by the distances a and b detected twice and the door width; the conventional unit 4 performs real-time detection of obstacles through sensors, and in this process, the maximum angle that the vehicle door can open is also calculated, which is different from the maximum opening angle calculated by the special unit 5. When the special unit 5 is running, the maximum opening angle set by the special unit 5 shall prevail; the standard value s and the maximum opening angle are obtained through big data calculation and are applicable to different models of vehicles.

Claims

1. A car door opening obstacle avoidance system, characterized in that: It includes a detection sensor and a processing device, wherein the detection sensor is arranged on the side of the car door and is used to transmit and receive ultrasonic waves for detection; the processing device is an on-board computing device, which issues instructions to the sensor based on the computing chip to make it transmit waves and receive echo information; In the processing device, an automatic detection program is provided, which includes a detection unit, a comparison unit, a standard value unit, a conventional unit and a special unit; wherein the detection unit controls the detection sensor on the vehicle, and uses at least two detection sensors on the door to detect obstacles outside the door, and obtains two sets of detection distances; the comparison unit is connected to the detection unit, receives the two sets of detected data, calculates the data, obtains the absolute value of the difference between the two, and compares the difference with the data in the standard value unit; the standard value unit is connected to the cloud or database to store the standard value of the difference under various scenarios; the conventional unit controls the door switch system, adopts the traditional real-time detection method, and performs real-time detection of the door opening; the special unit is connected to the comparison unit, when the comparison module outputs data that meets the result, the special unit works, and then the conventional unit performs the door opening work while being monitored by the special unit; if the comparison module outputs data that meets the result, the conventional unit works directly; The workflow is as follows: In the first step, the detection unit starts to detect obstacles outside the door; the detection data is obtained, and the distance data measured by the sensor close to the A column of the vehicle is a; the distance data measured by the sensor close to the B column of the vehicle is b, and the data a and b are transmitted to the comparison module; wherein the distances a and b are the shortest distances between the door and the obstacle in the real-time state; In the second step, the comparison module calculates the difference between the data a and b, takes the absolute value |ab|, and extracts the comparison standard value s from the standard value unit; compares the size of |ab| with s; Step 3: When |ab|≤s, the comparison module issues a command to the special unit, and the door is opened by the special unit; In the fourth step, the special unit issues a maximum opening angle instruction to the door, and then the conventional unit works. When the door reaches the maximum opening angle, the special unit opens and takes over the conventional unit to stop the door from opening further. Step 5: When |ab|>s, the comparison module issues instructions to the conventional unit to perform door switch operation.

2. The vehicle door opening obstacle avoidance system according to claim 1, characterized in that: The detection units are arranged around the vehicle doors, and at least two detection sensors are arranged on each vehicle door.

3. The vehicle door opening obstacle avoidance system according to claim 1, characterized in that: When the conventional unit is working, the distance detection unit is also working, using the sensor to perform real-time distance detection and determine the door opening action.

4. The vehicle door opening obstacle avoidance system according to claim 1, characterized in that: When the special unit is turned on, if the conventional unit detects an obstacle before reaching the maximum opening angle and needs to stop the door, the conventional unit is executed; When the door reaches the maximum angle, the door will stop regardless of the result of detection by the conventional unit.

5. The vehicle door opening obstacle avoidance system according to claim 1, characterized in that: The maximum opening angle is calculated from the two detected distances a and b and the door width.

6. The vehicle door opening obstacle avoidance system according to claim 1, characterized in that: The conventional unit detects obstacles in real time through sensors, and during this process calculates the maximum angle that the door can open, which is different from the maximum opening angle calculated by the special unit. When the special unit is running, the maximum opening angle set by the special unit shall prevail.

7. The vehicle door opening obstacle avoidance system according to claim 1, characterized in that: The standard value s and the maximum opening angle are obtained through big data calculation and are applicable to different models of vehicles.

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