Please select the most similar patent number from A, B, C and D. Which number is?
A piezoelectric vibration sensor, comprising an upper cover plate structure, a positioning plate (1), a lower cover plate structure, a piezoelectric element (2) and a circuit mechanism (3); the upper cover plate structure, the positioning plate (1) and the lower cover plate structure are arranged in sequence, and form a cavity therein; a channel (13) is provided on a positioning plate body, one end of the channel (13) is in communication with the cavity, and the other end of the channel is in communication with the atmosphere; one end of the piezoelectric element (2) is provided in the channel (13), and the other end of the piezoelectric element is provided in the cavity; and the circuit mechanism (3) is provided on the positioning plate body (11) and located in a first chamber, and an upper electrode and a lower electrode are led out from the piezoelectric element (2), and the piezoelectric element is connected to the circuit mechanism (3). The piezoelectric vibration sensor has a stacked structure, and the piezoelectric element is embedded in the cavity formed by the cover plates, reducing the space occupation rate of a product, having a small volume and enlarging the usage range; in addition, the design of the stacked structure enables, during production, batch processing or large-scale automated production, improving the production efficiency.
A: A shear-type piezoelectric sensor (100) and a method for manufacturing the shear-type piezoelectric sensor (100). The shear-type piezoelectric sensor (100) comprises: a collar (101), a piezoelectric element (105), and a mass (106), wherein the collar (101) is disposed outside a fastening nail (102), the fastening nail (102) can be screwed onto a support (104) arranged on a base (103); the piezoelectric element (105) is disposed outside the collar (101); the mass (106) is disposed outside the piezoelectric element (105), the collar (101) is expanded as the fastening nail (102) is screwed onto the support (104), the piezoelectric element (105) is expanded by an expanding force transferred from the collar (101), and the mass (106) is expanded by an expanding force transferred from the piezoelectric element (105).
B: The present invention provides a camera module, an optical anti-shake method thereof, and an electronic device. At least one piezoelectric actuator is transmittingly connected to the photosensitive assembly. The piezoelectric actuator comprises a piezoelectric element, a drive shaft, and a moving member. One end of the piezoelectric element is fixed, and the drive shaft is arranged on the piezoelectric element. The drive shaft is in frictional contact with the moving member. The piezoelectric element drives the drive shaft, and the drive shaft drives the moving member by friction, so that the piezoelectric actuator drives the photosensitive assembly to move in an X-axis direction and/or a Y-axis direction so as to realize optical anti-shake of the camera module.
C: A heat dissipation module is used for a device provided with heat dissipation teeth. The heat dissipation module comprises a fixing apparatus and at least two vibration units, wherein each of the vibration units comprises a piezoelectric element and a solid piece. The piezoelectric element in each of the vibration units is connected to one end of the solid piece in the vibration unit. The fixing apparatus is connected to the piezoelectric element in each of the vibration units and used for fixing the module. According to a preceding technical scheme, the heat dissipation module comprises the at least two vibration units and the piezoelectric element is connected to the one end of the solid piece in any one of the vibration units. Therefore, when the piezoelectric element vibrates, the solid piece can be driven to swing, thus providing outside wind for the device provided with the heat dissipation teeth and implementing a heat dissipation effect. In addition, because rotating components such as a bearing and the like are not used any more, not only power consumption is lowered, but also noise is reduced. Also provided are a dissipation system, a control method and a related device.
D: The present description provides a vibration sensor and a microphone, composed of a piezoelectric system and a capacitive system. The piezoelectric system comprises a vibrating component and a piezoelectric sensing component that collects a first electrical signal generated due to deformation of the vibrating component. The capacitive system uses the vibrating component in the piezoelectric system as a movable capacitive plate in the capacitive system, and a fixed substrate and the vibrating component are arranged opposite each other to form a capacitive vibration sensor. The deformation of the vibrating component causes the distance between the vibrating component and the fixed substrate to change, and a capacitive sensing component collects a second electrical signal generated due to the change in the distance. The capacitive sensing component is arranged in an area, in which the first electrical signal is low, in the piezoelectric system, so that the space of the vibration sensor can be rationally utilized, and second electrical signals collected by the capacitive system can be increased without affecting the output of the first electrical signal of the piezoelectric system, thereby improving the sensitivity of the vibration sensor and also increasing the space utilization.
Answer: D