| 摘要 |
A marking device for a target board is provided to permit shooting practice to be easily and smoothly performed by carrying out a real-time monitoring on shooting, and allow for ease of control in case of zero point shooting. A marking device(1) comprises a target board(2), an ultrasonic vibration sensor(3), a distribution amplifying transmitter(4), a receiving differential analyzer(5), and a monitor(6). The target board is made of a material capable of transmitting sound and vibration, and has a front surface where a marking sheet(8) is arranged so that the marking sheet is attachable/detachable. The ultrasonic vibration sensor is arranged at a rear center and left and right symmetrical portions of the target board. The distribution amplifying transmitter amplifies vibration frequency and level sensed by the ultrasonic vibration sensor, and transmits, through wire/wireless communication, the amplified vibration frequency and level to the place where a shooter is located. The receiving differential analyzer is arranged to analyze time taken for transmitting the frequency and level to each vibration sensor by measuring the vibration frequency and level transmitted from the distribution amplifying transmitter over wireless communication. The monitor displays scores on the target board on the basis of the frequency and level analyzed by the receiving differential analyzer.
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