초록 ▼

A passenger vehicle polling system. The system is capable of polling one or more terminal units, where each terminal unit is provided at a different one of a plurality of passenger seats in a passenger vehicle, to obtain information indicative of the state of each terminal unit. The polling is accom

A passenger vehicle polling system. The system is capable of polling one or more terminal units, where each terminal unit is provided at a different one of a plurality of passenger seats in a passenger vehicle, to obtain information indicative of the state of each terminal unit. The polling is accomplished by transmitting a polling command signal from a head end apparatus through a transmission line to the terminal units. Preferably, a sensor is mounted adjacent each passenger seat to sense the status of the passenger seat. The sensed information is transmitted as a polling answer signal through the transmission line to the head end apparatus so that the status of each passenger seat and the condition of each passenger can be checked from the head end apparatus. Further, a system according to the invention may transmit audio and video programs to the terminal units, and the polling answer signal may indicate which audio or video program has been selected at each terminal unit.

대표청구항 ▼

A passenger vehicle polling system, including: a head end apparatus comprising means for generating a polling command signal and means for centralizing polling answer signals generated in response to the polling command signal, each one of said polling answer signals including a status signal and an

A passenger vehicle polling system, including: a head end apparatus comprising means for generating a polling command signal and means for centralizing polling answer signals generated in response to the polling command signal, each one of said polling answer signals including a status signal and an address signal identifying one of the passenger seats; a plurality of terminal units each provided at a different one of the passenger seats, each of said terminal units comprising a means for decoding said polling command signal, and a means for generating said each polling answer signal; and a means for transmitting the polling command signal from the head end apparatus to the terminal units, and a means for transmitting said each polling answer signal from said one of the terminal units at which it is generated to the head end apparatus.