| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an easily portable power saving type information transmission system. <P>SOLUTION: An electromagnetic wave to be transmitted from a transmitter 11 is amplitude-modulated by a signal detected by sensors 22a to 22n in a transmission module 21 by antennas 25a to 25n, and the reflected reflection wave is received and demodulated by a signal reproducer 31. The transmission module 21 is made compact and easily portable so that it is possible for a testee to freely act by radio transmission. Also, power consumption can be suppressed not by transmitting any electromagnetic wave but by reflecting the electromagnetic wave. Also, the signals detected by the sensors 22a to 22n are converted from a voltage into a frequency so that the real time detection of the signal can be attained. Furthermore, a transmitter 11 outputs non-modulated carrier signals (sine wave signals) of different frequencies fa, fb through fn by time-division to a transmission module 21 so that multiple channel transmission can be attained. <P>COPYRIGHT: (C)2007,JPO&INPIT |
