US 12,030,450 B2
Sensor devices having sensor and MEMS microphone and associated methods
Rainer Markus Schaller, Saal an der Donau (DE); and Horst Theuss, Wenzenbach (DE)
Assigned to Infineon Technologies AG, Neubiberg (DE)
Filed by Infineon Technologies AG, Neubiberg (DE)
Filed on Jun. 18, 2021, as Appl. No. 17/351,329.
Claims priority of application No. 102020117857.3 (DE), filed on Jul. 7, 2020.
Prior Publication US 2022/0009438 A1, Jan. 13, 2022
Int. Cl. B60R 21/0136 (2006.01); B81B 3/00 (2006.01); B60R 21/013 (2006.01)
CPC B60R 21/0136 (2013.01) [B81B 3/0021 (2013.01); B60R 2021/01302 (2013.01); B81B 2201/0257 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A sensor device, comprising:
a sensor configured to detect a physical quantity generated by an impact event and to generate first measurement data based on the physical quantity generated by the impact event;
a housing including a sound opening covered by a sound-permeable membrane, wherein the sound-permeable membrane is configured to enable a flow of a gas between a cavity formed by the housing and an area surrounding the sensor device; and
a microelectromechanical system (MEMS) microphone arranged in the housing and configured to:
detect sound waves generated by the impact event and communicated via the flow of the gas between the cavity and the area surrounding the sensor device,
process the sound waves generated by the impact event based on a Fourier transform, and
generate second measurement data based on the sound waves process based on Fourier transform,
wherein the sensor device is configured to provide the first measurement data and the second measurement data to a processing circuit,
wherein the processing circuit is configured to detect the impact event based on a combination of the first measurement data and the second measurement data.