Data loggers
First Claim
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1. A data logger comprising:
- a real time clock;
a data memory having a predetermined number of addresses;
data accumulating means for accumulating data received after an arbitrary commencement time;
transfer means for transferring data accumulated in said accumulating means to successive ones of said addresses, and clearing said accumulating means, each time that the real time reaches one of a plurality of predetermined points in time that are spaced by predetermined intervals t, andcontrol means responsive to data being stored in all of said addresses to;
(i) manipulate mathematically the data in an address or addresses corresponding to the unexpired portion of a real time interval of duration n.t that started before and included said arbitrary commencement time, and put the result in one of said addresses,(ii) manipulate mathematically the data in each successive group of n of said addresses and put each result in a successive one of said addresses,(iii) manipulate mathematically the data in a final group of said addresses, if the number of addresses in the final group is between zero and n, and put the result in said accumulating means, and(iv) cause said transfer means thereafter to transfer accumulated data from said accumulating means to successive ones of said addresses not containing said results, and to clear said accumulating means, each time that the real time reaches one of a plurality of predetermined points in time that are spaced by predetermined intervals equal to n.t.
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Abstract
A data logger for logging data wherein stored incoming data is related to real time. Incoming data initially is stored at a relatively fine time resolution in a data memory. When the capacity of the data memory is exhausted, the stored data is rearranged into a relatively coarse time resolution form and then further incoming data is collected at the relatively coarse resolution. In the event of such a change of resolution, the relationship between the stored data and real time is not distorted.
54 Citations
8 Claims
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1. A data logger comprising:
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a real time clock; a data memory having a predetermined number of addresses; data accumulating means for accumulating data received after an arbitrary commencement time; transfer means for transferring data accumulated in said accumulating means to successive ones of said addresses, and clearing said accumulating means, each time that the real time reaches one of a plurality of predetermined points in time that are spaced by predetermined intervals t, and control means responsive to data being stored in all of said addresses to; (i) manipulate mathematically the data in an address or addresses corresponding to the unexpired portion of a real time interval of duration n.t that started before and included said arbitrary commencement time, and put the result in one of said addresses, (ii) manipulate mathematically the data in each successive group of n of said addresses and put each result in a successive one of said addresses, (iii) manipulate mathematically the data in a final group of said addresses, if the number of addresses in the final group is between zero and n, and put the result in said accumulating means, and (iv) cause said transfer means thereafter to transfer accumulated data from said accumulating means to successive ones of said addresses not containing said results, and to clear said accumulating means, each time that the real time reaches one of a plurality of predetermined points in time that are spaced by predetermined intervals equal to n.t. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification