Transducer temperature sensing
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United States of America Patent
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Jun 21, 2022
Grant Date -
Sep 10, 2020
app pub date -
May 26, 2020
filing date -
Feb 3, 2017
priority date (Note) -
In Force
status (Latency Note)
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Abstract
In described examples, one or more devices include: apparatus including a lens element and a transducer to vibrate the lens element at an operating frequency when operating in an activated state; and controller circuitry. The controller circuitry is arranged to measure an impedance of the apparatus, to determine an estimated temperature of the apparatus in response to the measured impedance, to compare the estimated temperature against a temperature threshold for delineating an operating temperature range of the apparatus, and to toggle an activation state of the transducer in response to comparing the estimated temperature against the temperature threshold.
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International Classification(s)
- H03K:PULSE TECHNIQUE
- G01K:MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT;....
- B06B:GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS I....
- G01N:INVESTIGATING OR ANALYSING MATERIALS BY DETERMININ....
- G05B:CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTION....
- G05D:SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC....
- G01R:MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC V....
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