VIBRATION-TYPE DRIVING APPARATUS THAT DETECTS UNDESIRED VIBRATIONS, CONTROL METHOD FOR THE VIBRATION-TYPE DRIVING APPARATUS, STORAGE MEDIUM, ROBOT, PAN HEAD FOR IMAGE PICKUP APPARATUS, AND IMAGE FORMING APPARATUS
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United States of America Patent
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Issued Date -
Oct 25, 2018
app pub date -
Apr 23, 2018
filing date -
Apr 23, 2018
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Abstract
A vibration-type driving apparatus that is capable of detecting an undesired vibration in a vibrating body more accurately than conventional detection methods even if a frequency of the undesired vibration falls inside a range of driving frequencies or is an integer multiple of a driving frequency. The driven body which is brought into contact with the vibrating body is driven by generating a driving vibration in the vibrating body through application of driving voltage to the electro-mechanical energy conversion element. An electro-mechanical energy conversion element of the vibrating body has a first sensor phase and a second sensor phase placed at different locations in the vibrating body. A vibration of the vibrating body is detected by using a result of comparison between an output signal from the first sensor phase and an output signal from the second sensor phase.
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