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Title:
PREPAID-SYSTEM GAS SUPPLY CONTROL METHOD AND GAS SUPPLY CONTROL SYSTEM, AND GAS RESIDUAL AMOUNT DISPLAY DEVICE
Document Type and Number:
Japanese Patent JP2010282449
Kind Code:
A
Abstract:

To provide a prepaid-system gas supply control system in which device cost is reduced without needing provision of a new communication line at the time of installation.

A home display device 3 connected to a gas meter 2 is installed in each gas consumption place 6. When transmitting a gas purchase request to a server 5 from a communication terminal 12 such as a cellphone and performing a money payment procedure, the server 5 performs settlement processing of a gas purchase price, and issues a rewriting code effective in only the home display device 3 storing and holding an in-subtraction-counter-start point based on the in-subtraction-counter-start point and a gas purchase amount received from the communication terminal 12. The home display device 3 collates a generated collation code with the input rewriting code based on the stored in-subtraction-counter-start point, decides whether or not it is an effective rewriting code, and adds the gas purchase amount to a subtraction counter 7 when it is effective. At that time, the in-subtraction-counter-start point is updated to a value different from before the addition.


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Inventors:
Tsuchida, Yasuhide
Nishida, Junichi
Application Number:
JP2009000135728
Publication Date:
December 16, 2010
Filing Date:
June 05, 2009
Export Citation:
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Assignee:
TOYO KEIKI CO LTD
International Classes:
G07F15/02; G01D4/14; G01F3/22; G06Q20/00; G06Q20/28; G06Q50/00; G06Q50/06
Domestic Patent References:
2002-03-15
2008-10-01
2008-05-15
2002-01-25
2006-09-21