Funktioneller Selbsttest für ein Piezoelektrisches, in einem Endprodukt Eingesetztes Element

Details

Veröffentlichungs-Nr.

EP3524946

Aktenzeichen

EP18156383

Anmeldetag

12. Februar 2018

Veröffentlichung

10. Juli 2024

Erteilung

10. Juli 2024

Rechtsraum

EP

IPC

G01H3/00G01R31/28G01R29/22G01D21/00G01D18/00G01P21/00

Abstract

Apparatus and associated methods relate to a functional self-test, including (1) generation of an excitation signal, (2) applying the excitation signal to a unit under test (UUT), the excitation signal including a cyclical signal for a first interval and substantially zero signal for a second interval, (3) determining frequency content of a UUT response signal, and (4) generating a fail result in response to the frequency content below a predetermined threshold. In an illustrative example, the UUT may be a piezoelectric element (PE). The UUT response signal may be processed by a filter, for example. A portion of the filtered UUT response signal, responding to the second interval of the excitation signal, may be analyzed by a fast Fourier transform module (FFTm), for example. In various implementations, the functional self-test may advantageously determine the health of a piezoelectric gas sensing element, periodically, in a field-deployed implementation.

Anmelder

Firma

Honeywell International Inc.

Land

🇺🇸 USA

Fachgebiete