Self-adaptive capacitance sensing system
By incorporating an adaptive capacitive sensing system within the seat, and utilizing the area difference and connection method between the electrode layer and the ground electrode layer, the problem of misjudgment by capacitive sensors when in contact with the human body is solved, thereby improving the accuracy and comfort of pressure detection.
Patent Information
- Application Number
- CN202520173356.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-26
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-01-26
AI Technical Summary
Existing capacitive sensors have difficulty accurately determining pressure when a person is in contact with a seat, especially when the contact area and pressure change, resulting in serious misjudgments. Furthermore, the thickness of clothing affects the detection accuracy, and barometers have low accuracy under low pressure.
An adaptive capacitive sensing system is designed by forming a capacitor by setting an electrode layer, a dielectric layer and a ground electrode layer inside the seat. The area of the ground electrode layer is larger than that of the electrode layer. The electrode layer and the ground electrode layer are connected by pins. The area of the dielectric layer is larger than both of them. The capacitive sensor is set between different material layers inside the seat to ensure accurate signal transmission.
It improves the accuracy and sensitivity of human body pressure detection, reduces false judgments, and enhances the comfort and support of the seat.
Smart Images
Figure CN223910378U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to chair technical field, concretely speaking, a kind of self-adapting capacitive sensing system. BACKGROUND
[0002] Commonly used capacitive sensor, detect the capacitance between human body and sensor, as the basis of pressure detection. Human body as one of the electrodes, sensor as another electrode, the dielectric material between the two electrodes is human clothes, and seat leather, and comfortable sponge on the leather, when the contact area between human body and sensor is larger and the contact pressure is smaller, and the contact area between human body and sensor is smaller but the contact pressure is larger, in these two states, the capacitance value may be close. Cannot accurately determine the pressure of human body on seat, when human body moves in a larger range, this can cause misjudgment. The thickness of human clothes can also affect the detection of capacitance. With barometer as the scheme of pressure sensor, when the air bag pressure is smaller, the pressure change is small, and it cannot adapt to the perception of small pressure, and the control precision is low. SUMMARY
[0003] To solve the problems raised in the above background art, the purpose of the utility model is to provide a self-adapting capacitive sensing system, comprising a seat and a capacitive sensor, one or more capacitive sensors are arranged in the seat, the capacitive sensor is arranged in the direction from far to near from human body in turn electrode layer, adhesive layer one, dielectric layer, adhesive layer two and ground electrode layer, capacitor is formed between the two layers of electrode layer and ground electrode layer, the area of ground electrode layer is larger than the area of electrode layer, and the ground electrode layer is grounded.
[0004] The electrode layer and the ground electrode layer are provided with electrode pins.
[0005] The electrode pins of the ground electrode layer are gathered to the total pin.
[0006] The area of the dielectric layer is greater than or equal to the area of the electrode layer and the area of the ground electrode layer.
[0007] The seat is sequentially provided with seat frame, air bag, seat rigid foam material, seat soft foam material, heating layer and chair surface material from far to near from human body, and the capacitive sensor can be arranged between the seat rigid foam material and the seat soft foam material, or arranged between the seat soft foam material and the heating layer.
[0008] The ground electrode layer is arranged to face the human body, and the electrode layer is arranged to face the seat soft foam material or the seat rigid foam material.
[0009] Compared with the prior art, the utility model discloses eliminate the influence of human body as electrode to the capacitor sensor, avoid the detection error, accurately detect the pressure between human body and seat, improve the detection precision, and the corresponding sensitivity is higher. BRIEF DESCRIPTION OF DRAWINGS
[0010] Figure 1 It is structural front view and sectional view for capacitor sensor embodiment one;
[0011] Figure 2 It is structural front view and sectional view for capacitor sensor embodiment two;
[0012] Figure 3 It is structural schematic diagram for adaptive capacitor sensor system setting in seat;
[0013] Reference Figure 1 , 1, dielectric layer, 2, ground electrode layer, 3, electrode layer, 4, adhesive layer two, 5, adhesive layer one, 6, electrode pin, 7, total pin. DETAILED DESCRIPTION
[0014] The utility model will be further explained according to the drawings. Embodiment one
[0015] As Figure 1 An adaptive capacitor sensing system includes a seat and a capacitor sensor, one or more capacitor sensors are arranged in the seat, the capacitor sensor is sequentially stacked in the direction from far to near from human body electrode layer 3, adhesive layer one 5, dielectric layer 1, adhesive layer two 4 and ground electrode layer 2, electrode layer 3 and dielectric layer 1 are connected by adhesive layer one 5, adhesive layer two 4 connects ground electrode layer 2 and dielectric layer 1, adhesive layer one 5 adhesive layer two 4 adopt double-sided adhesive material, capacitor is formed between electrode layer 3 and ground electrode layer 2, the area of ground electrode layer 2 is greater than the area of electrode layer 3, in order to avoid that signal electrode detects the capacitance value of human body wrongly, ground electrode layer 2 is grounded. Multiple capacitor sensors are vertically arranged in the seat, and each capacitor sensor is spaced apart from each other.
[0016] Electrode layer 2 and ground electrode layer 3 can adopt conductive cloth and / or conductive coating and / or plating layer, dielectric layer 1 adopts elastic material, improves the sensitivity of capacitor sensor and the comfort of seat.
[0017] Electrode layer 3 and ground electrode layer 2 are provided with electrode pin 6, and are independently connected to other equipment. The electrode pin 6 of ground electrode layer 2 is gathered to total pin 7, and is connected to other equipment after gathering.
[0018] The area of dielectric layer 1 is greater than or equal to the area of electrode layer 3 and the area of ground electrode layer 2, which improves the accuracy of detection.
[0019] AsFigure 3 The capacitive sensor is arranged in the seat, and the seat frame, the air bag, the seat rigid foam material, the seat soft foam material, the capacitive sensor, the heating layer and the chair surface material are arranged in sequence from far to near from the human body, so that the stability and durability of the capacitive sensor are improved, and the comfort and support of the seat are enhanced. The capacitive sensor can be arranged between the seat rigid foam material and the seat soft foam material, or arranged between the seat soft foam material and the heating layer.
[0020] The ground electrode layer 2 is arranged to face the human body, and the electrode layer 3 is arranged to face the seat soft foam material and the seat rigid foam material.
[0021] After the passenger sits down, the adaptive capacitive sensing system senses the distance change of the electrode layer 3 and the ground electrode layer 4, and calculates the real-time capacitance value and the pressure value. Embodiment two
[0022] As Figure 2 An adaptive capacitive sensing system, other features are the same as embodiment one, the difference is that a plurality of capacitive sensors are arranged vertically in the seat, the plurality of capacitors share a whole dielectric layer 1, adhesive layer two 4 and ground electrode layer 2, and the electrode layer 3, adhesive layer one 5 of the plurality of capacitors are provided with a certain spacing. So that the area of the ground electrode layer 2 is greater than the area of the electrode layer 3, and the area of the dielectric layer 1 is greater than the area of the electrode layer 3 and the area of the ground electrode layer 2.
Claims
1. An adaptive capacitive sensing system comprising a seat, a capacitive sensor, characterized in that: The seat is provided with one or more capacitive sensors, which are stacked in the direction from far to close to the human body in sequence of an electrode layer (3), an adhesive layer one (5), a dielectric layer (1), an adhesive layer two (4) and a ground electrode layer (2), a capacitor is formed between the electrode layer (3) and the ground electrode layer (2), the area of the ground electrode layer (2) is larger than that of the electrode layer (3), and the ground electrode layer (2) is grounded.
2. The self-adapting capacitive sensing system of claim 1, wherein: The electrode layer (3) and the ground electrode layer (2) are provided with electrode pins (6).
3. The self-adapting capacitive sensing system of claim 2, wherein: The electrode pins (6) of the ground electrode layer (2) are gathered to a total pin (7).
4. The self-adapting capacitive sensing system of claim 1, wherein: The area of the dielectric layer (1) is greater than or equal to the areas of the electrode layer (3) and the ground electrode layer (2).
5. The self-adapting capacitive sensing system of claim 1, wherein: The seat is provided with one or more capacitive sensors, which are stacked in the direction from far to close to the human body in sequence of an electrode layer (3), an adhesive layer one (5), a dielectric layer (1), an adhesive layer two (4) and a ground electrode layer (2), a capacitor is formed between the electrode layer (3) and the ground electrode layer (2), the area of the ground electrode layer (2) is larger than that of the electrode layer (3), and the ground electrode layer (2) is grounded.
6. The self-adapting capacitive sensing system of claim 1 or 5, wherein: The electrode layer (3) and the ground electrode layer (2) are provided with electrode pins (6). The electrode pins (6) of the ground electrode layer (2) are gathered to a total pin (7). The area of the dielectric layer (1) is greater than or equal to the areas of the electrode layer (3) and the ground electrode layer (2). The seat is provided with one or more capacitive sensors, which are stacked in the direction from far to close to the human body in sequence of an electrode layer (3), an adhesive layer one (5), a dielectric layer (1), an adhesive layer two (4) and a ground electrode layer (2), a capacitor is formed between the electrode layer (3) and the ground electrode layer (2), the area of the ground electrode layer (2) is larger than that of the electrode layer (3), and the ground electrode layer (2) is grounded. The electrode layer (3) and the ground electrode layer (2) are provided with electrode pins (6). The electrode pins (6) of the ground electrode layer (2) are gathered to a total pin (7). The area of the dielectric layer (1) is greater than or equal to the areas of the electrode layer (3) and the ground electrode layer (2). The seat is provided with one or more capacitive sensors, which are stacked in the direction from far to close to the human body in sequence of an electrode layer (3), an adhesive layer one (5), a dielectric layer (1), an adhesive layer two (4) and a ground electrode layer (2), a capacitor is formed between the electrode layer (3) and the ground electrode layer (2), the area of the ground electrode layer (2) is larger than that of the electrode layer (3), and the ground electrode layer (2) is grounded. The electrode layer (3) and the ground electrode layer (2)