Yokogawa Electric Corporation

Takuya Saitou

Shigeru Takezawa

Yoshinobu Sugihara

The objective is to realize a numeric value search apparatus and numeric value search method capable of rapidly searching for a numeric value of a prescribed rank. The present invention is characterized in that it comprises the following: a storage unit which stores multiple pieces of digitized numeric value data; a resolution specifying means which specifies a frequency distribution resolution; a frequency distribution creation unit which determines the frequency distribution of numeric value data in the storage unit using the resolution specified by this resolution specifying means; and a computation unit which determines the numeric value range or numeric value with the prescribed rank from the frequency distribution determined by this frequency distribution creation unit; wherein the resolution specifying means increases the resolution specified to the frequency distribution creation unit in steps, based on the computation results of the computation unit.

Numeric value search apparatus and numeric value search method

The present invention is intended to provide a waveform measuring instrument which can carry out signal processing and waveform parameter measurement with high accuracy and at high resolution. In a waveform measuring instrument configured to write measured signal waveforms into a memory after converting the waveforms to digital data, the present invention is characterized by providing an interpolation system which performs interpolation between the above digital data and writing the data obtained after interpolation into the above memory.

Waveform measuring instrument using interpolated data

The present invention is intended to provide a waveform measuring instrument whose waveform reproducibility in the equivalent time sampling system is improved. The present invention is characterized by that, in a waveform measuring instrument configured so that the repeated waveform data items are acquired and sent to the acquisition memory by means of the equivalent time sampling, the above acquisition memory is divided into a plurality of time slot regions corresponding to the interval of equivalent time sampling and a plurality of memory address groups is assigned to each time slot region.

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Musashino, Japan

Takuya Saitou