US 5,025,653 AGranted

Gas detection system

AssigneeConducta Gesellschaft fur MeB- und Regeltechnik

InventorHans P. Schuldt

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Abstract

In a gas detection system for detecting the content of inflammable, explosive and/or toxic or other gases an arrangement is proposed according to which a central electronic evaluation system is connected to a plurality of measuring heads, which are installed at the points of measurement, by a single common two-wire line and each measuring head is provided, at its place of installation, with its own intelligence (microprocessor) for processing at least partly the values supplied by the sensor, each measuring head being equipped with at least two sensors of different types or measuring ranges and with an additional temperature sensor and each sensor having an identification which is indicative of the type and measuring range of the sensor and which is picked up by the measuring head. The electronic evaluation system and the measuring heads communicate with each other by bidirectional digital communication, after the measuring heads have been addressed, and the measuring head is supplied with current via the two-wire line.

Claims20

Dependent claims

A gas detection system for detecting the content of gases, comprising:

a plurality of measuring heads, each said head being positioned at a measuring point, each said measuring head being equipped for connection with a least one sensor, said sensors being one of the same and different types, sensors of the same type having one of the same and different measuring ranges;
a central electronic evaluation system, said evaluation system being connected to said plurality of measuring heads by means of a common two-wire line, said common two-wire line between said central electronic evaluation system and said measuring heads being adapted for bidirectional digital communication and, simultaneously, for supplying electrical operating current to said measuring heads;
each said measuring head having its own processing means for at least partially processing the signals supplied by each said sensor attached thereto, each said sensor having an identification indicative at least of its type, measuring component and measuring range, said identification being detected by the processing means of the associated measuring head upon connection of said sensor to said associated measuring head,

Dependencies are inferred from the claim text.