Capacitive pressure sensing device and electronic device

Abstract

Embodiments of the present application provide a capacitive pressure sensing device and electronic equipment. The capacitive pressure sensing device includes an elastic carrier, a first capacitive plate, and a second capacitive plate. The first end face and the second end face at both ends of the carrier, and the first end face and the second end face are staggered from each other; the first capacitor plate is arranged on the elastic carrier along the direction from the first end face to the second end face; the second capacitor plate is arranged along the second end face The direction from the end surface to the first end surface is set on the elastic carrier, and the overlapping area of ​​the first capacitor plate and the second capacitor plate in the radial direction of the elastic carrier changes with the deformation of the elastic carrier. The capacitive pressure sensing device provided in the embodiment of the present application can sense the pressure acting on any position in the circumferential direction of the elastic carrier, and the pressure sensing area is greatly increased.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a capacitive pressure sensing device and electronic equipment. Background technique [0002] A capacitive pressure sensor is a pressure sensor that uses capacitance as a sensitive element to convert the measured pressure into a change in capacitance value. Capacitive pressure sensors currently on the market generally use circular metal films or metallized films as the two electrode plates of the capacitor. When the electrode plates feel the pressure and change the distance between the two electrode plates, a The capacitance changes, and the electrical signal that has a certain relationship with the capacitance can be output through the measuring circuit. However, the capacitive pressure sensor of this structure can only detect the pressure acting on the electrode plate or the plane where the electrode plate is located. For the pressure in other directions, such as the pressure a...

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Problems solved by technology

However, the capacitive pressure sensor of this structure can only detect the pressure acting on the electrode plate or the plane where the electrode plate is located. For the pressure in other directions, such as the pressure acting between two electrode plates, the pressure sensor It will not be able to sense accurately, so the pressure sensing area of ​​the existing pressure sensor is small, and the detection ability for pressure in different directions is limited

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