Communications: electrical – Selective – Having indication or alarm
Patent
1976-03-03
1977-08-09
Farley, Richard A.
Communications: electrical
Selective
Having indication or alarm
340 3T, G01S 380
Patent
active
040414426
ABSTRACT:
A data acquisition system is provided for acquiring acoustic information from an array placed in a body of water and for transmitting the information through a single transmission line to remotely located data processing equipment. The array includes a plurality of sensors, a plurality of sub-multiplexers, a master multiplexer and an A/D converter. The sensors are arranged to receive acoustic signals from objects submerged in the water and each sensor provides an analog electrical signal representative of the acoustic signal received thereby. Each sub-multiplexer has a plurality of inputs and a single output with each of the inputs being connected to a corresponding one of the sensors. The sub-multiplexers sequentially sample signals received at their inputs from the sensors connected thereto and transmit these samples to a single output provided on each sub-multiplexer. The master multiplexer sequentially samples signals from the outputs of the sub-multiplexers and transmits these samples to the A/D converter. Multiplexer timing is controlled so that the A/D converter repeatedly receives analog samples from all acoustic sensors. The master multiplexer may further include two individual multiplexers and means for alternately connecting outputs of these multiplexers to the master multiplexer output. The A/D converter encodes each sample into a binary data word. These binary words are changed to a ternary code by a ternary encoder and then transmitted through the single transmission line to the data processing equipment.
REFERENCES:
patent: 3795817 (1974-03-01), Chambaut
patent: 3810082 (1974-05-01), Arens
patent: 3852708 (1972-01-01), Doolittle et al.
Baker Carl W.
Farley Richard A.
General Electric Company
Lang Richard V.
Neuhauser Frank L.
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