| 摘要 |
PURPOSE:To obtain a device in which no increment of the number of cables is required for that of the number of communication signals by converting image information image-picked up with plural cameras and voice information extracted with a microphone to signals with prescribed frequencies, respectively, and communicating them after super-imposing on a coaxial cable. CONSTITUTION:The plural cameras 5a-5c and the microphone 9 are arranged on a working carriage 1. The image information image-picked up with the cameras 5a-5c are converted to image signals with the prescribed frequencies with an RF converter provided at the control panel 11 of the carriage 1, and an acoustic voltage extracted with the microphone 9 is converted to an audio signal with the prescribed frequency with the RF converter. Those signals are mixed with a mixer, and also, are amplified with an amplifier, then, each signal is superimposed, and is transmitted to an operating panel via the coaxial cable 13a. Thereby, it is possible to perform communication between the operating panel and the control panel with one coaxial cable even when the number of communication elements such as the number of cameras, etc., is increased. |
