Electronic measuring circuit with a piezo-ground system and method for generating an acceleration-proportional signal

DE102025129145B3Undetermined Publication Date: 2026-09-03BRUEEL & KJAER VIBRO GMBH
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Patent Information

Application Number
DE102025129145
Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
Filing Date
2025-07-23
Publication Date
2026-09-03
Estimated Expiration
2045-07-23

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Abstract

The present invention relates to an electronic measuring circuit with a piezo ground system (500) as a signaling element and a two-stage amplifier circuit consisting of a first amplifier stage (100) with a charge-to-voltage converter (58) and a subsequent second amplifier stage (200), wherein the piezo ground system (500) feeds the charge-to-voltage converter (58), which is designed to achieve an impedance transformation (400) by taking into account a first capacitor C7 (55) and a second capacitor C6 (57), which reduces the original output impedance of the piezo element (49) by a factor of 8, and to feed the signal into the second amplifier stage (200), wherein the second amplifier stage (200) has a non-inverting second operational amplifier (36), with the gain of which the desired output level of the piezo ground system (500) can be dimensioned.The present invention further relates to a method for generating an acceleration-proportional signal using the electronic measuring circuit.
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Citation Information

Patent Citations

  • Electronic measuring device for vibration measuring with a piezoelectric acceleration sensor

    EP3312615B1