| 摘要 |
PROBLEM TO BE SOLVED: To dispense with a mechanism such as a sensor for detecting a vibration state, by determining an excitation pulse train on the basis of these values, a supplement impulse for compensating for a damping quantity of a momentum of a vibrating part by respective excitation pulses, and a growth impulse by the respective excitation pulses. SOLUTION: A control part of a combinational weighing device is provided with an excitation pulse setting part 141 and a control pulse generating part 143. The excitation pulse setting part 141 is provided with a growth quantity arithmetic operation part 145, a damping quantity arithmetic operation part 146 and an excitation pulse arithmetic operation part 147. The growth impulse for growing vibration (increasing amplitude) up to target amplitude, is determined with respective excitation pulses by the growth quantity arithmetic operation part 145. The supplement impulse for compensating for the damping quantity is determined with respective excitation pulses by the damping quantity arithmetic operation part 146. The excitation pulse arithmetic operation part 147 determines the excitation pulse train by determining an impulse imparted by the respective excitation pulses by adding the growth impulse and the supplement impulse. The control pulse generating part 143 also controls an impression of voltage on an electromagnet in response to the determined excitation pulse train. COPYRIGHT: (C)2006,JPO&NCIPI
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