| 摘要 |
A system equipped with a security unit is provided to realize a system security function by detecting commands inputted from other users or movement of the system, and transmitting a detection signal to a user. An input unit receives a command from a user. A weight detector(214) detects weight of a system(210). A controller outputs an output signal to a user device(220) through a transmitter(213) by using at least one of outputs of the input unit and the weight detector. A signal generator(212) generates an output signal by receiving an output signal from the input unit or the weight detector The user device includes, a receiver(221) receiving the signal transmitted through the transmitter, a signal processor(222) processing the received signal, and a converter(223) converting/outputting the processed signal to a display unit(224). A sensing unit(211) includes a weight sensor(214) and a keyboard controller(215).
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