| 摘要 |
<p>A method and system for measuring work done by a moving force or torque over either a preset measurement time period or a preset distance travelled uses a transducer (1) which measures the force or torque and provides a signal proportional to the measured value. This signal may be digital or may be analogue and converted to a digital signal in an A/D converter (2). The resulting signal is sampled at preselected trigger intervals during the measurement period, sampling being controlled by a trigger (3) which is controlled by the movement of the force or torque such that the interval between successive trigger signals represents a distance travelled by the force or torque. The sampled values of the force or torque are summed in a summing circuit (5) to provide a signal representing a value which is proportional to the accumulated work done by the force or torque since the measurement period began. The signal is then processed in a calculator (6) and displayed on a display (W) as a reading in, for example, the energy unit Joule. The calculator (6) may also produce displays of the accumulated force or torque and power over the measurement period. In addition, the average work, force or torque and power may also be calculated and displayed at selected intervals during the measurement period.</p> |
