DATA LOGGER, DATA SAVING METHOD AND PROGRAM
First Claim
1. A data logger comprising:
- a first storage storing newer data among data sequentially outputted from a measurer means such that the number of stored data become a specific number;
second storage; and
a manager that, if a save instruction to save the data outputted from said measurer is accepted, repeatedly calculates an index value indicative of stability of the data outputted from said measurer based on the data stored in said first storage at least until the index value satisfies a predetermined stability condition, and sequentially saving the data outputted from said the measurer in said second storage, and when the index value satisfying the stability condition is calculated, stops saving the data from said measurer in said second storage means.
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Accused Products
Abstract
It is an object to provide a data logger which solves a problem in which data required to analyze a cause of occurrence of abnormality cannot be acquired. Temporary memory 102 stores newer data among data sequentially outputted from measurer 101 wherein the number of the newer data corresponds to a specific number of times. Manager 103 repeatedly calculates an index value indicative of stability of the data outputted from measurer 101 based on the data stored in temporary memory 102 at least until the index value satisfies a predetermined stability condition. Further, if manager 103 accepts an abnormal value trigger, manager 103 sequentially stores the data outputted from measurer 101 in main memory 104. When the index value satisfying the stability condition is calculated by manager 103, manager 103 stops saving the data in main memory 104.
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Citations
12 Claims
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1. A data logger comprising:
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a first storage storing newer data among data sequentially outputted from a measurer means such that the number of stored data become a specific number; second storage; and a manager that, if a save instruction to save the data outputted from said measurer is accepted, repeatedly calculates an index value indicative of stability of the data outputted from said measurer based on the data stored in said first storage at least until the index value satisfies a predetermined stability condition, and sequentially saving the data outputted from said the measurer in said second storage, and when the index value satisfying the stability condition is calculated, stops saving the data from said measurer in said second storage means. - View Dependent Claims (2, 3, 4, 5)
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6. A data saving method performed by a data logger which includes first storage that store newer data among data sequentially outputted from measurer wherein the number of the newer data corresponds to a specific number of times, and second storage, the method comprising:
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if a save instruction to save the data outputted from said measurer is accepted, repeatedly calculating an index value indicative of stability of the data outputted from said measurer based on the data stored in said first storage at least until the index value satisfies a predetermined stability condition; sequentially saving the data outputted from said measurer in said second storage if the save instruction is accepted; and stopping saving the data from said measurer in said second storage when the index value satisfying the stability condition is calculated. - View Dependent Claims (7, 8, 9, 10)
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11. A recording medium readable by a computer and storing therein a program causing a computer to execute data saving processing, the computer being connected to first storage for storing newer data among data sequentially outputted from measurer wherein the number of the newer data corresponds to a specific number of times, and second storage, the data saving processing comprising:
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calculating processing for, if a save instruction to save the data outputted from said measurer is accepted, repeatedly calculating an index value indicative of stability of the data outputted from said measurer based on the data stored in said first storage at least until the index value satisfies a predetermined stability condition; saving processing for sequentially saving the data outputted from said measurer in said second storage if the save instruction is accepted; and stop processing for stopping saving the data from said measurer in said second storage when the index value satisfying the stability condition is calculated. - View Dependent Claims (12)
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Specification