Gas leakage detection system

Details Gas leakage detection system Gas leakage detection system

1997-08-28

1999-02-02

Brock, Michael

Measuring and testing

With fluid pressure

Leakage

73 40, G01M 308, G01M 304

Patent

active

058668039

DESCRIPTION:

BRIEF SUMMARY
TECHNICAL FIELD

This invention relates to a gas leakage detection system that detects the leakage of gas in a gas line system of a definite scope such as from the main side of a gas line, which branches out to individual gas users, to each of these gas users.


BACKGROUND ART

In a gas supply system for an apartment building or other type of collective housing area, there are cases in which a number of liquefied petroleum gas (LP gas) cylinders are arranged in a single location and the LP gas is supplied through gas lines from this single location to each household. In addition, in the case of municipal natural gas, the gas lines also branch out throughout a collective housing area, so the natural gas is supplied from the main side of these gas lines to each household.
The gas supply system in such a field of a definite scope is managed by the LP gas supplier that distributes the LP gas cylinders or the natural gas utility, whose employees regularly travel to the site and perform the stipulated inspection services. This management also includes surveillance for gas leakage, which is important from a safety standpoint.
However, the surveillance for gas leakage that is performed within the inspection services described above may not necessarily be performed regularly and must be done manually, and thus may not be performed frequently, so one cannot say that the gas supply system is under constant surveillance.
Moreover, the inspection for gas leakage must be performed over the entire field and thus consumes considerable time and effort, so this is a major burden on the LP gas supplier or natural gas utility.
In light of these problems, the object of the present invention is to provide a gas leakage detection system that can perform gas detection more easily and reliably.


DISCLOSURE OF THE INVENTION

In order to achieve the aforementioned objects, the gas leakage detection system of the present invention comprises: gas supply amount detection means that detects the amount of gas supplied at the main side of a gas line that branches out to individual gas users, gas usage detection means that detects the amount of gas used by each of said individual gas users, and leakage determination means that finds the total amount of gas used as the sum of the amounts of gas used by the individual gas users, compares this total amount of gas used against the aforementioned amount of gas supplied, and thus determines whether or not there is any leakage of gas between the main side of the gas line and the individual gas users.
Therefore, the work of receiving the amount of gas supplied and amount of gas used and determining whether or not leakage is present can be performed automatically.
The result of this determination is sent to the LP gas supplier or other central office, so the central office can keep gas leakage under constant surveillance.
In addition, an alarm is sounded at the central office when gas leakage is detected, so the central office side can immediately handle the situation.


BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a block diagram illustrating the principle of the configuration of the gas leakage detection system of the present invention.
FIG. 2 is a drawing that illustrates one preferred embodiment of the gas leakage detection system of the present invention.
FIG. 3 is a flow chart of the gas leakage determination process executed by the gas leakage detection device.
FIG. 4 is a flow chart illustrating the procedure of a learning method.
FIG. 5 is a flow chart of a learning method that incorporates updating.


BEST MODE FOR CARRYING OUT THE INVENTION

The invention will now be explained in more detail with reference to the appended drawings.
FIG. 1 is a block diagram illustrating the principle of the configuration of the gas leakage detection system of the present invention. In this diagram, gas supply amount detection means 1 detects the amount of gas supplied at the main side of a gas line that branches out to individual gas users, while gas usage detection means 2 detects the amount of gas used by

REFERENCES:
patent: 5261268 (1993-11-01), Namba

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