| 摘要 |
Data recording device including a sampling device for sampling data to be recorded at a predetermined period, a permissible error range calculating device for calculating a permissible error range with respect to the data sampled by the sampling device at each sampling timing, and a recording device for deciding a longest straight line intersecting the permissible error range calculated by the permissible error range calculating device and recording a length of the straight line represented by a sampling number obtained by the sampling device and the data at an end point of the straight line, whereby compression processing of the data sampled is carried out, and the data compressed is recorded. The data recording device further includes a device for detecting an inflection point of the data sampled by the sampling device, wherein when the inflection point is detected by the inflection point detecting device, the compression processing is stopped.
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