Anti-pinch sensor for vehicle door

Abstract

The utility model discloses a car door anti-pinch sensor which comprises an induction antenna and an induction signal acquisition circuit, and an electromagnetic induction signal generated by the induction antenna is transmitted to a car door controller through the induction signal acquisition circuit to be processed. A metal framework arranged in a door frame sealing strip at the periphery of a door frame of a vehicle body and / or a metal framework arranged in a door slot sealing strip at a door slot of the vehicle body are / is used as the induction antenna. The device is not only suitable for detecting obstacles which rapidly intrude into a sensing area, but also suitable for detecting obstacles which are statically parked on a vehicle body, so that the anti-pinch performance is effectively improved, and the development cost and the implementation cost of newly added parts are effectively saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile sensor, especially to a car door anti-pinch hand sensor. BACKGROUND

[0002] Typical car door pinch hand scenarios mainly have the following two situations:

[0003] 1. The injured person's body is located outside the vehicle, and the hand is supported on the A or B column of the vehicle, the door closing action is initiated by others and is not in the injured person's field of view, and the injured person causes hand pinch due to not noticing the door closing risk;

[0004] 2. The injured person's body is inside the vehicle, the hand is grabbed on the door frame or placed in the pinch hand area of the door frame and the door, the door closing action is initiated by others and the position of the injured person's hand is not found, resulting in hand pinch.

[0005] At present, the electric door anti-pinch sensor technical scheme includes pressure sensors, capacitive sensors, etc. The pressure sensor is usually arranged at the edge of the door, and when the door is pressed against the obstacle, the surface of the pressure sensor is subjected to a certain pressure, and a sensing signal is triggered to detect the obstacle in the gap between the door and the door frame. The capacitive sensor is usually arranged on the door trim, which detects obstacles by electromagnetic induction. The capacitive sensor can detect obstacles by contact and / or proximity to detect larger obstacles, such as human bodies, etc.

[0006] The pressure sensor is suitable for slow door closing speed application scenarios, such as the slow closing speed of the rear door, when the door edge and the vehicle body pinch the obstacle, the door can stop in time. The left and right side doors have a fast closing speed, and although the door controller receives the obstacle signal when the door quickly hits the obstacle, it is not in time to stop the movement of the door. Therefore, the pressure sensor is not suitable for left and right side door anti-pinch applications.

[0007] In order to timely detect whether there is an obstacle in the door pinch hand area, a non-contact sensing sensor, such as a capacitive sensor, can be added in this risk area. When the finger enters the door pinch hand area, the sensor sends an obstacle signal to the door controller in time. The door controller can refer to the obstacle signal when executing the door closing instruction to make appropriate response, such as stopping or issuing a sound alarm to remind, etc.

[0008] The current door anti-pinch technology tends to arrange a capacitive sensor on the inner side of a moving door, and detects an obstacle in a non-contact sensing manner during door closing. When the inner side of the door is close to the vehicle body at a distance less than a certain set value, the capacitive sensor can sense certain features on the vehicle body, such as door hole edge steps, door lock hooks and the like, so that when the door is very close to the vehicle body, the capacitive sensor on the inner side of the door is turned off to avoid false detection.

[0009] However, the capacitive sensor arranged on the inner side of the door is difficult to detect the finger on the door frame or the door gap. When the finger is attached to the edge of the door gap, the signal strength generated by the finger is affected by the vehicle body and is easily ignored by the capacitive sensor arranged on the door. The capacitive sensor arranged on the door is more suitable for detecting obstacles that quickly intrude into the sensing area, and the sensing effect on obstacles that are stationary and parked on the vehicle body is not ideal.

[0010] Therefore, the applicant has found a method to solve the above problems through beneficial exploration and research, and the technical scheme to be introduced below is generated in this background. Practical new type content

[0011] The technical problem to be solved by the present application is to provide a door anti-pinch sensor that improves anti-pinch performance, reduces development cost and implementation cost, and solves the problems of the prior art.

[0012] The technical problem to be solved by the present application can be solved by using the following technical scheme:

[0013] A door anti-pinch sensor, comprising an induction antenna and an induction signal acquisition circuit, the electromagnetic induction signal generated by the induction antenna is transmitted to the door controller through the induction signal acquisition circuit for processing, characterized in that the metal framework arranged in the door frame sealing strip of the vehicle body door frame and / or the metal framework arranged in the door gap sealing strip of the vehicle body door gap is used as the induction antenna.

[0014] In one preferred embodiment of the present application, the vehicle body sheet metal part is used as a shielding layer of the induction antenna.

[0015] The utility model discloses the beneficial effect lies in: the utility model discloses the metal framework in the door frame sealing strip or the metal framework in the door gap sealing strip as the induction antenna, and the door frame sealing strip or the door gap sealing strip is in the anti -hand -pinching area, can detect whether the finger is close or close to the vehicle body, can detect the contact action of the finger or the action of non -contact close to the vehicle body, thereby improve the barrier signal, and through the induction signal acquisition circuit, the induction signal is transmitted to the vehicle door controller, and the vehicle door controller can control whether the vehicle door continues to close or stops according to the induction signal, not only is suitable for detecting the barrier that breaks into the sensing area fast, but also is suitable for detecting the barrier that is parked on the vehicle body, effectively improve the anti -hand -pinching performance. Meanwhile, because the door frame sealing strip or the door gap sealing strip is arranged on the vehicle body or close to the vehicle body, can utilize the vehicle body sheet metal spare as the shielding layer of induction antenna, effectively improve the anti -interference ability of induction antenna. In addition, the utility model discloses the metal framework in the door frame sealing strip and / or the metal framework in the door gap sealing strip as the induction antenna, does not need to increase the conductive spare as the capacitive antenna, effectively saves the development cost and implementation cost of new spare. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, below will be to the drawings needed to be used in the embodiment or prior art description simple introduction, obviously, below description's drawing only is some embodiments of the utility model, for the ordinary skilled person in the art comes, under the premise of not paying the creative labor, can also obtain other drawings according to these drawings.

[0017] Figure 1 It is the circuit schematic diagram of the utility model.

[0018] Figure 2 It is the arrangement schematic drawing of the utility model using door frame sealing strip as induction antenna.

[0019] Figure 3 It is the local longitudinal section view of the utility model that induction antenna is arranged in door frame sealing strip.

[0020] Figure 4 It is the local longitudinal section view of the utility model that induction antenna is arranged in door frame sealing strip (finger close to induction antenna).

[0021] Figure 5 It is the local longitudinal section view of the utility model that induction antenna is arranged in door frame sealing strip (finger close to induction antenna, and induction antenna generates electromagnetic induction signal).

[0022] Figure 6 It is the arrangement schematic drawing of the utility model using door gap sealing strip as induction antenna.

[0023] Figure 7 Figure 3 is a partial longitudinal sectional view of the induction antenna arranged in the door gap sealing strip of the present application.

[0024] Figure 8 Figure 4 is a partial longitudinal sectional view of the induction antenna arranged in the door gap sealing strip of the present application (finger close to the induction antenna).

[0025] Figure 9 Figure 5 is a partial longitudinal sectional view of the induction antenna arranged in the door gap sealing strip of the present application (finger close to the induction antenna, the induction antenna generates an electromagnetic induction signal).

[0026] Figure 10 Figure 6 is a partial longitudinal sectional view of the induction antenna arranged in the door frame sealing strip of the present application (this is a frameless door).

[0027] Figure 11 Figure 7 is a partial longitudinal sectional view of the induction antenna arranged in the door frame sealing strip of the present application (this is a frameless door, finger close to the induction antenna).

[0028] Figure 12 Figure 8 is a partial longitudinal sectional view of the induction antenna arranged in the door frame sealing strip of the present application (this is a frameless door, finger close to the induction antenna, the induction antenna generates an electromagnetic induction signal). DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, purposes and effects realized by the present application easy to understand, the present application is further described below in combination with specific drawings.

[0030] Referring to Figure 1 , the figure shows a car door anti-pinch hand sensor, which comprises an induction antenna 100 and an induction signal acquisition circuit 200. The electromagnetic induction signal generated by the induction antenna 100 is transmitted to the car door controller 10 for processing through the induction signal acquisition circuit 200, and the car door controller 10 controls whether the car door continues to close or stops according to the electromagnetic induction signal. Among them, the main function of the induction signal acquisition circuit 200 is to collect and judge the change of the electromagnetic induction signal to identify the finger and other obstacles, which is a common circuit in the capacitive sensor and belongs to the conventional technology in the field, which will not be described here.

[0031] Referring to Figure 2 and in combination with Figures 3 to 5 , the metal skeleton 31 arranged in the door frame sealing strip 30 at the periphery of the car body door frame 21 is used as the induction antenna 100, and the door frame sealing strip 30 is located in the anti-pinch hand area. When the finger 1 contacts or approaches the door frame sealing strip 30, the surrounding magnetic field of the induction antenna 100 will change, such as Figure 5As shown, the movement of charge on the induction antenna 100 causes a change in the current signal. By processing the electromagnetic induction signal, the presence of a finger can be identified. This method can effectively detect whether a finger is close to or near the vehicle body 20, especially the door frame 21, thereby detecting whether the finger is touching or not touching the vehicle body, thus improving the obstacle signal. The induction signal is transmitted to the door controller 10 through the induction signal acquisition circuit 200. The door controller 10 can control whether the door continues to close or stops based on this induction signal. It is suitable not only for detecting obstacles that quickly enter the sensing area, but also for detecting obstacles that are stationary on the vehicle body, effectively improving the anti-pinch performance. At the same time, since the door frame sealing strip 30 is arranged on the vehicle body 20, the sheet metal of the vehicle body can be used as a shielding layer for the induction antenna 100, effectively improving the anti-interference capability of the induction antenna. This utility model uses an existing part (door frame sealing strip 30) as an induction antenna and makes it play more roles, increasing the added value of the part without increasing the material cost, and saving the development cost and implementation cost of adding new parts.

[0032] See Figure 6 and combined Figures 7 to 9 A metal frame 41, located within a door seal strip 40 at the door seam 22, serves as an inductive antenna 100. The door seal strip 40 is situated within the anti-pinch area. When a finger 1 touches or approaches the door seal strip 40, the magnetic field surrounding the inductive antenna 100 changes, such as... Figure 9 As shown, the movement of charge on the induction antenna 100 causes a change in the current signal. By processing the electromagnetic induction signal, the presence of a finger can be identified. This method can effectively detect whether a finger is close to or near the vehicle body 20, especially the door seam 22, thereby detecting the finger's contact action or non-contact approach to the vehicle body, thus improving the obstacle signal. The induction signal is transmitted to the door controller 10 through the induction signal acquisition circuit 200. The door controller 10 can control whether the door continues to close or stops based on this induction signal. It is suitable not only for detecting obstacles that quickly enter the sensing area, but also for detecting obstacles that are stationary on the vehicle body, effectively improving the anti-pinch performance. At the same time, since the door seam sealing strip 40 is close to the vehicle body 20, the vehicle body sheet metal can be used as a shielding layer for the induction antenna 100, effectively improving the anti-interference capability of the induction antenna. This utility model uses an existing part (door seam sealing strip) as an induction antenna and makes it play more roles, increasing the added value of the part without increasing the material cost, and saving the development cost and implementation cost of adding new parts.

[0033] This invention can also be applied to frameless car doors. See also Figures 10 to 12The metal sheet 51 within the door frame sealing strip 50 of the frameless door can also serve as an inductive antenna 100. The edge of the glass 52 of the frameless door is close to the door frame sealing strip 50 on the vehicle body to ensure waterproofing. Therefore, the door frame sealing strip 50 on the vehicle body can be used, with one or more metal strips embedded within it, as an inductive antenna. When the metal sheet 51 within the door frame sealing strip 50 is used as the inductive antenna 100, the vehicle body sheet metal 53 serves as a grounding shielding layer. When a finger 1 approaches the door frame sealing strip 50, it will generate electromagnetic induction on the magnetic field around the capacitor, such as... Figure 12 As shown, this causes a change in the sensor signal. By processing the electromagnetic induction signal, the presence of a finger is detected. Adding a new sensing antenna would inevitably increase automotive R&D costs. This invention utilizes existing components as sensing antennas and enhances their functionality, increasing the added value of the components without increasing material costs.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A vehicle door anti-pinch hand sensor, comprising an induction antenna and an induction signal acquisition circuit, an electromagnetic induction signal generated by the induction antenna is transmitted to a vehicle door controller through the induction signal acquisition circuit for processing; characterized in that, The metal skeleton arranged in the door frame seal strip at the periphery of the door frame of the vehicle body and / or the metal skeleton arranged in the door gap seal strip at the door gap of the vehicle body are used as the induction antenna.

2. The vehicle door anti-pinch sensor of claim 1, wherein, The sheet metal part of the vehicle body is used as a shielding layer of the induction antenna.

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