Time multiplexed electric wiring system for control and monitoring of field points
First Claim
1. An electric wiring system for interconnecting a plurality of local blocks each thereof including a transmitter and receiver unit having transmitting and receiving functions and a plurality of terminals and a plurality of terminals means each thereof having an assigned address connected respectively to each of said terminals, wherein at least one of said plurality of local blocks further includes oscillator means for generating a reference signal and means for generating a synchronous signal having a period of desired cycle of said reference signal, and wherein each of said transmitter and receiver units includes a plurality of transmitting and receiving blocks commonly connected to said terminals, a plurality of selector terminals for applying selecting signals to select one of said transmitting and receiving blocks corresponding to the assigned address of said terminal means and a counting block for receiving said synchronous signal and reference signal and for time-dividing each period of said synchronous signal by said reference signal to designate the address in order and for making the designated address agree with said assigned address and for applying said designated address to said transmitting and receiving blocks, thereby accomplishing transmission and reception of signals among said local blocks corresponding to said assigned address by said transmitting and receiving blocks selected by said selecting signals.
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Abstract
There is provided an electric wiring system in which a plurality of electric components, a plurality of command switches for actuating the electric components and a plurality of sensors, etc., are provided at various points of an automotive vehicle, transmitting and receiving units of time-shared pulse transmission type which are arranged at the various points of the vehicle are interconnected through a plurality of electric wires or lines, the electric components or loads are divided into a plurality of locals each thereof including a group of the loads, and the transmission and reception of information between the respective locals and a command section is effected by a time-shared pulse transmission method, whereby reducing the hazard of short-circuit fault.
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Citations
9 Claims
- 1. An electric wiring system for interconnecting a plurality of local blocks each thereof including a transmitter and receiver unit having transmitting and receiving functions and a plurality of terminals and a plurality of terminals means each thereof having an assigned address connected respectively to each of said terminals, wherein at least one of said plurality of local blocks further includes oscillator means for generating a reference signal and means for generating a synchronous signal having a period of desired cycle of said reference signal, and wherein each of said transmitter and receiver units includes a plurality of transmitting and receiving blocks commonly connected to said terminals, a plurality of selector terminals for applying selecting signals to select one of said transmitting and receiving blocks corresponding to the assigned address of said terminal means and a counting block for receiving said synchronous signal and reference signal and for time-dividing each period of said synchronous signal by said reference signal to designate the address in order and for making the designated address agree with said assigned address and for applying said designated address to said transmitting and receiving blocks, thereby accomplishing transmission and reception of signals among said local blocks corresponding to said assigned address by said transmitting and receiving blocks selected by said selecting signals.
- 5. An electric wiring system for interconnecting a plurality of local blocks each thereof including a transmitter and receiver unit, said transmitter and receiver unit including a plurality of detecting terminals respectively connected to a plurality of sensors each having an assigned address and a plurality of terminals respectively connected to a plurality of actuating means each having an assigned address, each said transmitter and receiver unit serving signal transmitting and receiving functions, wherein at least one of said plurality of local blocks further includes oscillator means for generating a reference signal and means for generating a synchronous signal, and wherein each said transmitter and receiver unit includes a plurality of transmitting and receiving blocks, a plurality of selector terminals for selecting and causing one of said plurality of transmitting and receiving blocks to perform the signal transmitting and receiving functions, a frequency dividing circuit for dividing the frequency of said reference signal, a reset circuit for receiving said synchronous signal to reset said frequency dividing circuit, and a logical circuit for receiving a plurality of frequency-divided output signals of said frequency dividing circuit and a signal from one of said detecting terminals to generate a level signal designating a corresponding one said assigned addresses, whereby accomplishing the transmission and reception of signals among said assigned addresses.
Specification