Acoustic sensor with a diaphragm made of a composite fiber material
Patent Information
- Authority / Receiving Office
- CN · China
- Current Assignee / Owner
- ROBERT BOSCH GMBH
- Publication Date
- 2015-05-06
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Abstract
Description
technical field
[0001] The invention relates to an acoustic sensor comprising a sensor housing and a vibration-capable diaphragm with a piezoelectric actuator. The invention also relates to the use of said sensor and its manufacturing method. Background technique
[0002] In general, an acoustic sensor converts an acoustic signal or a variable sound pressure caused by the acoustic signal into an electrical signal, in particular a voltage. In this case an acoustic sensor is used as a receiver. Conversely, an acoustic sensor can also function as a transmitter, which converts an electrical signal into an acoustic signal. In order to receive acoustic signals from or transmit acoustic signals to a space, a combination of vibration-capable diaphragms combined with piezo-electric actuators is often used in order to bring about an electromechanical interaction. The mode of operation of such a sensor is based on a direct relationship between the elastic deformation of the membrane...