| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a device capable of obtaining accurate keyboard stroke with respect to a keyboard instrument provided with a front punching member regardless of a key touch strength. <P>SOLUTION: When a CPU 200 determines that a key touch operation is started when an output voltage from a sensor part exceeds a reference voltage, it issues a count instruction to a timer part 202. When the CPU 200 determines that a key release operation is completed when the output voltage from the sensor part 100 falls below the reference voltage, it refers to memory contents of a table 207, grasps a sensor voltage correction amount corresponding to a timer value held by the timer part 202, and corrects a maximum sensor voltage value with the grasped sensor voltage correction amount, so as to obtain a sensor voltage range corresponding to real keyboard stroke. <P>COPYRIGHT: (C)2010,JPO&INPIT |
