| 摘要 |
<p>A method and apparatus are provided for measuring a compressive load on a structural member. The method includes the steps of developing an oscillatory signal which varies in frequency in accordance with a compressive force applied to the structural member; linearizing the relationship of the oscillatory signal to the compressive force in accordance with a plurality of oscillatory signals developed in response to a plurality of known compressive forces applied to the structural member; and calculating the compressive load on the structural member in accordance with the oscillatory signals developed and with the linearizing of the response. The apparatus comprises a signal generator coupled with the structural member and responsive to a compressive force applied thereto for producing a frequency-variable signal at a frequency corresponding to the compressive force. A measuring circuit is responsive to the frequency-variable signal for producing a load signal corresponding to the compressive load on the structural member. The measuring circuit includes a linearizing portion responsive to a plurality of frequency-variable signals produced in response to a corresponding plurality of known compressive forces applied to the structural member for producing a linearizing control signal, and a calculating portion responsive to the frequency-variable signal and to the linearizing control signal for calculating the compressive load.</p> |
