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US 8,947,981 B2Granted
Attenuating mass for an ultrasonic sensor, use of epoxy resin
AssigneeContinental Automotive GmbH
InventorsWalter Fischer, Volker Muhrer, Karl-Friedrich Pfeiffer, Manfred Roth
Life of this patent
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Abstract
Temperature stability at the temperatures prevailing in a motor and stability that is required over an entire temperature range are provided by an attenuating mass. This enables continuous use at temperatures of approximately 150° C. while providing ultrasonic attenuation at low temperatures.
Claims12
An attenuating mass adapted to be soft and stable in a temperature interval of −30° C. to 150° C., comprising:
- an epoxy resin matrix;
- and
- a filler with a multimodal grain size distribution, wherein the filler is dispersed throughout the resin matrix to cause a density gradient of particles.
An ultrasonic sensor, comprising:
- an ultrasonic transmitter;
- and
- an attenuating mass adapted to be soft and stable a temperature interval of −30′C to 150° C. and including an epoxy resin matrix and a filler with a multimodal grain size distribution, wherein the filler is dispersed throughout the resin matrix to cause a density gradient of particles.
Dependencies are inferred from the claim text.