| 摘要 |
<p>This strain-detection device is provided with a substrate designed so as to be provided on a strain element, first and second beams supported on the substrate so as to be able to vibrate in a flexing manner, a drive circuit, and a detection circuit. Said detection circuit functions so as to obtain the following: a first squared signal obtained by squaring a first detection signal based on the vibrations of the first beam; and a second squared signal obtained by squaring a second detection signal based on the vibrations of the second beam. The detection circuit also functions so as to obtain a product signal by multiplying the second squared signal by a sensitivity ratio, namely the ratio between the detection sensitivity of the first beam and the detection sensitivity of the second beam. The detection circuit further functions so as to detect a strain amount on the basis of the difference between the product signal and the first squared signal. This strain-detection device has a high degree of detection precision.</p> |
