Method for detecting capacitance between automotive interior component and human body, sensing device with charge receiving mapping layer and steering wheel with hand-off detection
AssigneeAew Technology Group Co., Ltd.
InventorsHaitao ZHANG, Chunmei LI, Hui JING, Chang LIU
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Abstract
Embodiments of the present disclosure provide a method for detecting a capacitance between an automotive interior component and a human body, including heating the automotive interior component through a metal wire in a heating period, acquiring a total human body occupancy capacitance through a metal wire in a sampling period, comparing magnitudes of the total human body occupancy capacitance and a capacitance threshold to obtain an occupancy situation of the automotive interior component, and repeatedly executing the above process.
Claims20
A method for detecting a capacitance between an automotive interior component and a human body, comprising following steps:
- S100, setting an occupancy capacitance threshold, a sampling period and a heating period;
- S200, heating the automotive interior component through a metal wire in the heating period, wherein a human body occupancy sensor is provided in the automotive interior component, and a sheetlike substrate and the metal wire provided on the sheetlike substrate are provided in the human body occupancy sensor;
- S300, acquiring a total human body occupancy capacitance through the human body occupancy sensor in the sampling period, wherein a capacitance receiving layer having conductivity is further provided in the automotive interior component, and the total human body occupancy capacitance is obtained through sensing capacitances between the human body and the metal wire, between the human body and the capacitance receiving layer and between the metal wire and the capacitance receiving layer;
- S400, comparing magnitudes of the total human body occupancy capacitance and the occupancy capacitance threshold, so as to obtain a comparison result, wherein the comparison result comprises a first comparison result and a second comparison result, when the total human body occupancy capacitance is larger than or equal to the occupancy capacitance threshold, the first comparison result is obtained, and when the total human body occupancy capacitance is smaller than the occupancy capacitance threshold, the second comparison result is obtained, the first comparison result indicates that the automotive interior component is occupied, and the second comparison result indicates that the automotive interior component is unoccupied;
- S500, executing step S200;
- S600, updating the total human body occupancy capacitance, and executing steps S300-S400;
- and
- S700, repeatedly executing steps S500-S600.
A sensing device with a charge receiving mapping layer, comprising:
- a functional layer, wherein the functional layer at least comprises a metal filament and an insulating layer, and the metal filament is configured to heat and sense;
- and
- an expansion layer, wherein the expansion layer is provided on either side of the metal filament, and the expansion layer has weak conductivity, so as to receive charges mapped by the metal filament, and expand a sensing area.
Dependencies are inferred from the claim text.