Vibration type weight measuring apparatus

Details Vibration type weight measuring apparatus Vibration type weight measuring apparatus

G - Physics

01

G

265/30

G01G 3/14 (2006.01) G01G 3/16 (2006.01) G01L 1/10 (2006.01)

Patent

CA 1264335

ABSTRACT OF THE DISCLOSURE The invention relates to a weight measuring apparatus utilizing a vibration type force sensor having a greatly in- creased Q and being inexpensive and easy to manufacture. The force sensor includes a single vibratory beam or a pair of vibra- tory beams, which oscillate at a particular measurement frequency related to the stress applied to the sensor by a weight. A rota- tional mass is coupled to a nodal point of the vibratory beam at the measurement frequency, and greatly influences the frequency at which the beam will vibrate. As a result, the tolerences for manufacture of the force sensor are greatly relaxed, and the pendulum-like movement of the rotational masses for a double-ended tuning fork type sensor tends to override any mismatch between the two parallel vibratory beams.

541166

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