PCB capacitive sensor and intelligent door lock control switch

Abstract

The invention discloses a PCB capacitive sensor and an intelligent door lock control switch, the PCB capacitive sensor comprises an induction layer, a dielectric layer and a protection layer which are stacked together up and down, wherein the induction layer and the protection layer are respectively located on the upper side and the lower side of the dielectric layer, and the dielectric layer comprises a non-conductive dielectric material substrate; the induction layer comprises a conductive metal induction sheet laid on the substrate and is used for generating induction capacitance; the protection layer comprises a signal shielding net which is laid on the substrate and used for preventing interference signals from entering the induction layer. According to the PCB capacitive sensor with the structure, the size of the sensor is effectively reduced, so that the requirement on the internal space of a vehicle door handle is reduced, a more reasonable and wider design space is provided for the vehicle door handle, and the size of the vehicle door handle can be made to be more delicate and small; besides, the PCB capacitive sensor is provided with the protection layer for preventing interference signals, so that the signal-to-noise ratio of the PCB capacitive sensor can be effectively improved, the touch sensing distance is longer, and the false triggering probability is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of touch-type electrothermal sensors, in particular to a PCB capacitive sensor and an intelligent door lock control switch for a car virtual key. Background technique [0002] With the development of technology, car smart keys have gradually transformed from traditional physical keys to virtual keys. The carriers of virtual keys are usually mobile phones, bracelets, watches and other products. Users no longer need to carry physical keys, they only need to activate the virtual key on the mobile APP to unlock and start the vehicle, and it has more functions than physical keys, such as sharing and other functions. [0003] At present, the common virtual keys are divided into the following types based on radio frequency signals: cloud keys, Bluetooth keys, NFC keys, UWB keys, etc. Based on the product form, there are: smart wearables such as mobile phones, watches, bracelets, and glasses. [0004] The car doo...

AI Technical Summary

Problems solved by technology

like Figure 8 and Figure 9 At present, the touch sensor of the door handle 1' on the car is mainly the metal insert 2', which has a poor signal-to-noise ratio and a short sensing distance. In addition, due to the relatively large volume of the metal insert 2', it needs to be designed on the door handle 1' The suitable installation space, therefore, limits the space design of the door handle 1', moreover, the touch sensor of this metal plug-in type is easily affected by factors such as rainwater, and the false recognition rate is relatively high

Images