Automatic foreign object detection and alarm method before a car door is closed

Abstract

The present invention discloses an automatic foreign object detection and alarm method before a car door is closed, which is characterized in that: the method comprises the following steps. S1. When the door is in an open state, the included angle between the door and the door frame is obtained through an angle sensor arranged on the door. When the angle between the door and the door frame continuously decreases by a, foreign object detection at the door position in the subsequent steps is carried out. S2. A radar sensing device installed at the lower edge position of the door is used to detect the actual distance between the radar sensing device and the bottom of the door frame. S3. If the actual distance between the radar sensing device and the bottom of the door frame is less than the theoretical distance between the two, it is determined that there is a foreign object between the door and the door frame, and an alarm is issued to prompt the occupant. This method realizes the detection and alarm of foreign objects at the door position during the door closing process, and avoids damage to the door and items caused by the door clamping a foreign object.

Description

Technical Field

[0001] The present invention relates to the field of foreign object detection for vehicle doors, and particularly to an automatic detection and alarm method for foreign objects before a sedan car door is closed. Background Art

[0002] With the development of the automotive industry, cars have become an essential means of transportation for many people and families when going out. Due to the huge potential of the automotive market, there are an endless number of cars on the market that can meet various needs and are suitable for various scenarios, and various functions are becoming increasingly perfect.

[0003] During the process of traveling by car, we often encounter various problems. Facing various scenarios, our vehicles need to have certain corresponding designs.

[0004] For example, we often encounter the following problems:

[0005] When getting in and out of the car, due to reasons such as the height of the car door frame, sometimes we need to lean to the side slightly. At this time, if the pockets of our clothes are relatively shallow, things may fall out of the pockets when getting in and out of the car. Especially in winter when the clothes are thick, things such as mobile phones and keys in the side pockets of the clothes may slide out and fall on the threshold of the car door frame, and we may not notice it immediately. So when we have already gotten in or out of the car and directly close the door, the items stuck on the threshold will be squeezed by the door, causing damage. Similarly, the car door will also be impacted; or if we are wearing relatively long clothes (such as skirts, windbreakers, etc.), when getting in the car, a part of the edge of the clothes just stays on the threshold, and it is also very difficult for us to directly notice it. At this time, because the clothes fabric is soft, it will not affect the closing effect of the door, but it will cause damage to the clothes. Thus, there are many similar situations. Summary of the Invention

[0006] The purpose of the present invention is to provide an automatic detection and alarm method for foreign objects before a sedan car door is closed, so as to realize the detection of foreign objects at the position of the car door when the sedan car door is closed.

[0007] To solve the above technical problems, the present invention provides a technical solution: an automatic detection and alarm method for foreign objects before a sedan car door is closed, and this method includes the following steps.

[0008] S1. When the car door is in the open state, obtain the included angle between the car door and the door frame through the angle sensor set on the car door. When the angle between the car door and the door frame continuously decreases by a, perform the subsequent foreign object detection at the position of the car door; where a is an angle set value.

[0009] S2. Use the radar sensing device installed at the lower edge position of the car door to detect the actual distance between the radar sensing device and the bottom of the door frame.

[0010] S3. If the actual distance between the radar sensing device and the bottom of the door frame is less than the theoretical distance therebetween, it is determined that there is a foreign object between the vehicle door and the door frame, and an alarm is issued to prompt the occupant.

[0011] According to the above solution, a = 20°.

[0012] According to the above solution, the theoretical distance between the radar sensing device and the bottom of the door frame in S3 is specifically calculated as follows.

[0013] L = 2Rsin(θ / 2)

[0014] where L is the theoretical distance between the radar sensing device and the bottom of the door frame, R is the distance between the radar sensing device and the vehicle door rotating shaft, and θ is the angle between the vehicle door and the door frame.

[0015] An automatic foreign object detection and alarm device for a vehicle door before closing for implementing the automatic foreign object detection and alarm method for a sedan vehicle door described above includes:

[0016] An angle sensor for obtaining the angle between the vehicle door and the door frame;

[0017] A radar sensing device disposed at the lower edge position of the vehicle door for detecting the actual distance between the radar sensing device and the bottom of the door frame;

[0018] A foreign object detection module electrically connected to the angle sensor and the radar sensing device; when the angle between the vehicle door and the door frame continuously decreases by a, foreign object detection at the vehicle door position is performed; according to the distance between the radar sensing device and the vehicle door rotating shaft and the angle between the vehicle door and the door frame, the theoretical distance between the radar sensing device and the bottom of the door frame is calculated, and the theoretical distance is compared with the actual distance measured by the radar sensing device. When the actual distance is less than the theoretical distance, an alarm signal is issued;

[0019] An alarm module electrically connected to the foreign object detection module; when the alarm module receives the alarm signal from the foreign object detection module, an alarm is given.

[0020] According to the above solution, a = 20°.

[0021] According to the above solution, the process by which the foreign object detection module calculates the theoretical distance between the radar sensing device and the bottom of the door frame is as follows.

[0022] L = 2Rsin(θ / 2)

[0023] where L is the theoretical distance between the radar sensing device and the bottom of the door frame, R is the distance between the radar sensing device and the vehicle door rotating shaft, and θ is the angle between the vehicle door and the door frame.

[0024] According to the above solution, the alarm module includes a speaker and an LED light disposed on the instrument panel.

[0025] A vehicle is provided with an automatic foreign object detection and alarm device before the car door is closed as described above.

[0026] The beneficial effects of the present invention are as follows: The opening angle of the car door is obtained by using an angle sensor, and it is judged whether the occupant has the intention to close the door by monitoring the change state of the car door angle; the theoretical angle between the radar sensing device and the door frame is obtained according to the included angle between the current car door and the door frame and the distance between the radar sensing device and the car door rotating shaft, and the theoretical distance is compared with the actual distance detected by the radar sensing device. If the actual distance is less than the theoretical distance, it is judged that there is a foreign object between the car door and the door frame, and an alarm is given, realizing the detection of foreign objects at the door position when the occupant closes the car door during getting on and off the vehicle, and preventing damage to objects and the car door caused by clamping foreign objects when closing the door. Description of the Drawings

[0027] Figure 1 It is a schematic diagram of the foreign object detection principle of an embodiment of the present invention.

[0028] In the figure: 1 - car door, 2 - radar sensing device, 3 - bottom of the door frame. Detailed Embodiments

[0029] To make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0030] An automatic foreign object detection and alarm method before a car door is closed, the method includes the following steps

[0031] S1. When the car door 1 is in the open state, the included angle between the car door 1 and the door frame is obtained through the angle sensor provided on the car door 1. When the angle between the car door 1 and the door frame continuously decreases by a, the subsequent steps of detecting foreign objects at the door position are carried out; where a is an angle setting value;

[0032] S2. Use the radar sensing device 2 installed at the lower edge position of the car door 1 to detect the actual distance between the radar sensing device 2 and the bottom 3 of the door frame;

[0033] S3. If the actual distance between the radar sensing device 2 and the bottom 3 of the door frame is less than the theoretical distance between the two, it is judged that there is a foreign object between the car door 1 and the door frame, and an alarm is issued to prompt the occupant.

[0034] Further, a = 20°.

[0035] Further, the theoretical distance between the radar sensing device 2 and the bottom of the door frame 3 in S3 is calculated as follows:

[0036] L = 2Rsin(θ / 2)

[0037] Where L is the theoretical distance between the radar sensing device 2 and the bottom of the door frame 3, R is the distance between the radar sensing device 2 and the door hinge, and θ is the angle between the car door 1 and the door frame.

[0038] An automatic foreign object detection and alarm device for a car door before closing, which is used to implement the automatic foreign object detection and alarm method for a car door described above, includes:

[0039] An angle sensor, which is used to obtain the angle between the car door 1 and the door frame;

[0040] A radar sensing device 2, which is arranged at the lower edge position of the car door 1 and is used to detect the actual distance between the radar sensing device 2 and the bottom of the door frame 3;

[0041] A foreign object detection module, which is electrically connected to the angle sensor and the radar sensing device 2; when the angle between the car door 1 and the door frame continuously decreases by a, foreign object detection at the car door position is performed; according to the distance between the radar sensing device 2 and the door hinge and the angle between the car door 1 and the door frame, the theoretical distance between the radar sensing device 2 and the bottom of the door frame 3 is calculated, and the theoretical distance is compared with the actual distance measured by the radar sensing device 2. When the actual distance is less than the theoretical distance, an alarm signal is sent;

[0042] An alarm module, which is electrically connected to the foreign object detection module; when the alarm module receives the alarm signal from the foreign object detection module, an alarm is given.

[0043] Further, a = 20°.

[0044] Further, the process of the foreign object detection module calculating the theoretical distance between the radar sensing device 2 and the bottom of the door frame 3 is as follows:

[0045] L = 2Rsin(θ / 2)

[0046] Where L is the theoretical distance between the radar sensing device 2 and the bottom of the door frame 3, R is the distance between the radar sensing device 2 and the door hinge, and θ is the angle between the car door 1 and the door frame.

[0047] Further, the alarm module includes a speaker and an LED light arranged on the instrument panel.

[0048] A car, which is provided with the automatic foreign object detection and alarm device for a car door before closing described above.

[0049] The above are only embodiments of the present invention, and do not thus limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall similarly be included within the patent protection scope of the present invention.

Claims

1. An automatic foreign object detection and alarm method before a car door is closed, characterized in that: The method includes the following steps: S1. When the car door is in the open state, obtain the included angle between the car door and the door frame through the angle sensor set on the car door. When the angle between the car door and the door frame continuously decreases by a, perform the foreign object detection at the door position in the subsequent steps; where a is the set value of the angle. S2. Use the radar sensing device installed at the lower edge position of the car door to detect the actual distance between the radar sensing device and the bottom of the door frame. S3. If the actual distance between the radar sensing device and the bottom of the door frame is less than the theoretical distance between the two, it is determined that there is a foreign object between the car door and the door frame, and an alarm is issued to prompt the occupant. The theoretical distance between the radar sensing device and the bottom of the door frame in S3 is specifically calculated as follows: L = 2Rsin(θ / 2) where L is the theoretical distance between the radar sensing device and the bottom of the door frame, R is the distance between the radar sensing device and the car door rotating shaft, and θ is the included angle between the car door and the door frame.

2. The automatic foreign object detection and alarm method for a car door before closing according to claim 1, characterized in that: a＝20°； where L is the theoretical distance between the radar sensing device and the bottom of the door frame, R is the distance between the radar sensing device and the car door rotating shaft, and θ is the included angle between the car door and the door frame.

3. An automatic foreign object detection and alarm device before closing a car door for implementing the automatic foreign object detection and alarm method before closing a car door described in claim 1, characterized in that: It includes: an angle sensor for obtaining the included angle between the car door and the door frame; a radar sensing device set at the lower edge position of the car door for detecting the actual distance between the radar sensing device and the bottom of the door frame; a foreign object detection module electrically connected to the angle sensor and the radar sensing device; when the angle between the car door and the door frame continuously decreases by a, perform foreign object detection at the door position; calculate the theoretical distance between the radar sensing device and the bottom of the door frame according to the distance between the radar sensing device and the car door rotating shaft and the included angle between the car door and the door frame, and compare the theoretical distance with the actual distance measured by the radar sensing device. When the actual distance is less than the theoretical distance, an alarm signal is issued; an alarm module electrically connected to the foreign object detection module; when the alarm module receives the alarm signal from the foreign object detection module, an alarm is given.

4. The automatic foreign object detection and alarm device for a car door before closing according to claim 3, characterized in that: a＝20°。 5. The automatic foreign object detection and alarm device for a car door before closing according to claim 3, characterized in that: The alarm module includes a speaker and an LED lamp set on the instrument panel.

6. A vehicle, characterized in that: The car is provided with a device for automatically detecting and alarming foreign objects before the car door is closed as described in claim 3.

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