Capacitance sensing device for sensing hand waving action, automobile charging port cover and automobile

Abstract

The utility model relates to a capacitance sensing device for sensing a hand waving action, an automobile charging port cover and an automobile. The capacitance sensing device comprises a capacitance digital conversion circuit, a processor and a sensing unit, the sensing unit comprises a main electrode and an auxiliary electrode; the number of the main electrodes is at least two, the edge distance between every two adjacent main electrodes meets G = p * H / W + k, and the main electrodes form a capacitance induction electric field used for non-contact type hand waving recognition and / or contact type hand waving recognition of the outer surface of a device installation object; the object outer surface of the area where each main electrode is located is provided with a guide mark, the auxiliary electrodes surround or partially surround the mark area, and the area of a single auxiliary electrode is configured to be smaller than half of the area of a single main electrode; the capacitance-to-digital conversion circuit is respectively coupled with each electrode; the processor is coupled with the digital conversion circuit and used for outputting electric signals according to capacitance of the main electrode and the auxiliary electrode. According to the utility model, the gesture opening action or the interference signal can be distinguished, and the misoperation of the charging port cover is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile, especially a kind of capacitive sensing device of induction hand waving action, automobile charging port cover, automobile. BACKGROUND

[0002] Automobile charging port cover is attached dust and other stains on surface with the passage of time, under the increasingly high health consciousness of people, the design demand of non-contact gesture opening automobile charging port cover appears.

[0003] The prior art adopts the arrangement of two horizontal electrodes, and gives a trigger signal to the automobile control system by recognizing horizontal one-way gesture waving or reciprocating gesture waving, and the control system controls the driving device to automatically open / close the cover accordingly.Under this sensor arrangement structure, it is easy to misjudge in the case of user wiping car, washing car, raining, etc. UTILITY MODEL CONTENT

[0004] To improve the deficiency in the prior art, the utility model provides a kind of capacitive sensing device of induction hand waving action, automobile charging port cover, automobile.

[0005] As a solution, the capacitive sensing device of induction hand waving action of the utility model includes a capacitive digital conversion circuit, a processor and a sensing unit.The sensing unit includes a main electrode and an auxiliary electrode.The main electrode has at least two, and the edge spacing of adjacent two main electrodes satisfies G=p*H / W+k, where W is the electrode width, G is the edge spacing of adjacent two main electrodes, H is the set non-contact sensing distance, p is the proportionality coefficient, and k is the minimum spacing of adjacent two main electrodes when contact triggering.The main electrode forms a capacitive sensing electric field for non-contact hand waving recognition and / or contact hand waving recognition of the outer surface of the device installation object.The object outer surface in the area of each main electrode is provided with a guide mark, the auxiliary electrode has multiple rings or partial rings outside the mark area, and the area of a single auxiliary electrode is configured to be less than half of the area of a single main electrode.The capacitive digital conversion circuit is coupled to each electrode, and the processor is coupled to the digital conversion circuit to output electrical signals according to the capacitance of the main electrode and the auxiliary electrode.

[0006] The utility model provides a vehicle door outer handle, which further includes the following auxiliary schemes:

[0007] Among them, the area of a single auxiliary electrode is configured to be less than at least one order of magnitude of the area of a single main electrode.

[0008] Among them, the sensing unit includes a first main electrode and a second main electrode, and the first main electrode and the second main electrode are arranged along a first direction.

[0009] Among them, the first main electrode and / or the second main electrode is arranged with a third main electrode in the orthogonal direction along the first direction.

[0010] The area of the main electrode is configured to be 3-5cm from the outer surface of the object at the effective sensing height of the constructed induced electric field.

[0011] The auxiliary electrode is a point electrode or a strip electrode.

[0012] The capacitive digital conversion circuit is coupled to each main electrode through a switch array to obtain the self-capacitance and / or mutual capacitance of the main electrode.

[0013] A capacitive sensing device is also provided, which is coupled to a communication link of a central control system of a vehicle.

[0014] A vehicle is also provided, which comprises the capacitive sensing device and has a communication link with a central control system of the vehicle.

[0015] The electrode arrangement can distinguish between a gesture start-up operation and an interference signal, reduce false operation of the charging port cover, and improve the possibility of mass production and user experience. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The basic electrode arrangement structure of the sensing unit is illustrated;

[0017] Figure 2 The arrangement relationship of the spacing between the two adjacent main electrodes is illustrated;

[0018] Figure 3 The arrangement scheme of the four self-capacitance main electrodes is illustrated;

[0019] Figure 4 The arrangement scheme of the four mutual-capacitance main electrodes is illustrated;

[0020] Figure 5 The design style of the strip auxiliary electrode is illustrated. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model.

[0022] The capacitive sensing device of the utility model can be applied to non-contact gesture opening of a vehicle charging port cover or a garbage can cover.

[0023] Figure 1The base electrode arrangement of the sensing unit is illustrated, including the main electrodes 100, the auxiliary electrodes 200. The main electrodes 100 have at least two, the minimum two main electrodes 100 constitute a capacitive sensing field for non-contact hand waving recognition and / or contact hand waving recognition in one direction of the outer surface of the installation object, and more main electrodes allow sensing of multi-directional gestures.

[0024] For the arrangement of the main electrodes, refer to Figure 2 , it is required that the edge distance between two adjacent main electrodes 100 satisfies the relationship G = p * H / W + k, where W is the electrode width, G is the edge distance between two adjacent main electrodes 100, H is the set non-contact sensing distance, p is the proportional coefficient, and k is the minimum distance between two adjacent main electrodes 100 when contact triggering. The distance between two adjacent main electrodes 100 is proportional to the non-contact distance and inversely proportional to the electrode width. That is, the farther the non-contact distance requires, the larger the main electrode 100 width, and the smaller the distance between the main electrodes 100.

[0025] The object outer surface in the area where each main electrode 100 is located is provided with a guide mark, and the auxiliary electrode 200 has a plurality of surrounding or partially surrounding the mark area, wherein the area of a single auxiliary electrode 200 is configured to be less than half the area of a single main electrode 100.

[0026] The capacitive digital conversion circuit is coupled to each electrode to obtain the capacitance, and the processor is coupled to the digital conversion circuit to output an electrical signal according to the capacitance of the main electrode 100 and the auxiliary electrode 200. The electrical signal can be expressed in the form of a control signal, raw data or sensing processing result.

[0027] The above structure, by arranging auxiliary electrodes 200 outside the mark area where the main electrodes 100 are located, since the auxiliary electrodes 200 are small, less than half the area of the main electrodes 100, non-contact gesture recognition is not possible, but close-range and contact touch and wiping, rain, small electrodes can be recognized. The user's touch swipe in the mark area and the non-contact gesture 3 to 5 cm apart, the large electrode can be recognized. But the small electrode cannot be recognized. At this time, the gesture is considered valid. If it is wiping, washing, raining, etc., the signal directly contacts the small electrode, and the small electrode can detect the valid signal, at this time, the signal of the large electrode is considered invalid.

[0028] In the above, the capacitance of the main electrode 100 can be self-capacitance and / or mutual capacitance. The self-capacitance has the advantages of channel and long sensing distance, and the mutual capacitance is less sensitive to the environment. The sensing device is provided with a switch array, and the capacitive digital conversion circuit is coupled to each main electrode 100 through the switch array to obtain the self-capacitance and / or mutual capacitance of the main electrode 100.

[0029] Corresponding to the self-capacitance scheme, such as Figure 3, the sensing unit can include a first main electrode 101, a second main electrode 102, the first main electrode 101 and the second main electrode 102 are arranged along a first direction. The first direction can be a horizontal direction, corresponding to the user's left and right wiping cars or left and right flushing actions of the water gun. Further, the first main electrode 101 and / or the second main electrode 102 is arranged with a third main electrode 103 in the orthogonal direction of the first direction. At this time, 3-4 self-capacitances are formed, and horizontal and vertical gesture recognition can be realized. Corresponding to the mutual capacitance scheme, each main electrode is divided into two, forming four mutual capacitances, realizing horizontal and vertical gesture recognition. Figure 4 , Figure 3 Each main electrode is divided into two, forming four mutual capacitances, realizing horizontal and vertical gesture recognition.

[0030] As an improved scheme, the area of a single auxiliary electrode 200 is configured to be at least one order of magnitude smaller than the area of a single main electrode 100, and the size difference of a larger area is differentiated, which can further reduce the probability of false triggering.

[0031] As another improved scheme, the area of the main electrode 100 is configured to be 3-5 cm away from the effective sensing height of the constructed sensing electric field from the surface of the object, which can better sense the hand waving action of an adult, and the distance is not too far to introduce more interference.

[0032] The utility model discloses, the auxiliary electrode 200 can be configured as Figure 1 The point electrode shown in the drawing, or Figure 5 The strip electrode shown in the drawing.

[0033] Finally, it should be explained that the above embodiments are only used to illustrate the technical scheme of the utility model, and not to limit the protection scope of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical scheme of the utility model can be modified or replaced equivalently without departing from the essence and scope of the technical scheme of the utility model.

Claims

1. A capacitive sensing device for sensing hand waving action, characterized in that: it comprises a capacitive digital conversion circuit, a processor, a sensing unit; the sensing unit comprises a plurality of main electrodes and a plurality of auxiliary electrodes; each main electrode has at least two, and the edge distance between two adjacent main electrodes satisfies G = p * H / W + k, W is the width of the electrode, G is the edge distance between two adjacent main electrodes, H is a set non-contact sensing distance, p is a proportional coefficient, and k is the minimum distance between two adjacent main electrodes when contact is triggered, and the main electrodes form a capacitive sensing electric field for non-contact hand waving recognition and / or contact hand waving recognition of the outer surface of the object to be installed by the device; the outer surface of the object in the area where each main electrode is located is provided with a guide mark, and the auxiliary electrodes have a plurality of surrounding or partially surrounding the mark area, and the area of a single auxiliary electrode is configured to be less than half of the area of a single main electrode; the capacitive digital conversion circuit is coupled to each electrode respectively; the processor is coupled to the digital conversion circuit, and is configured to output an electric signal according to the capacitance of the main electrodes and the auxiliary electrodes.

2. The capacitive sensing device of claim 1, wherein: The area of the single auxiliary electrode is configured to be less than at least one order of magnitude of the area of the single main electrode 。 3. The capacitive sensing device of claim 1, wherein: The sensing unit comprises a first main electrode and a second main electrode, and the first main electrode and the second main electrode are arranged along a first direction.

4. The capacitive sensing device of claim 3, wherein: A third main electrode is arranged in a direction perpendicular to the first direction of the first main electrode and / or the second main electrode.

5. The capacitive sensing device of claim 1, wherein: The area of the main electrode is configured to be 3-5 cm away from the effective sensing height of the constructed sensing electric field from the outer surface of the object.

6. The capacitive sensing device of claim 1, wherein: The auxiliary electrode is a point electrode or a strip electrode.

7. The capacitive sensing device according to claim 1, characterized in that: it comprises a switch array, and the capacitive digital conversion circuit is coupled to each main electrode through the switch array to obtain the self-capacitance and / or mutual capacitance of the main electrode.

8. A car charging port cover, characterized in that, The capacitive sensing device comprises the capacitive sensing device according to any one of claims 1-7, and the capacitive sensing device has a communication link with the automobile central control system.

9. An automobile characterized by comprising: The capacitive sensing device comprises the capacitive sensing device according to any one of claims 1-7 and the automobile central control system, and the capacitive sensing device has a communication link with the automobile central control system.

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