Patent ID: 7496457

Claim:
A load body state judging device to judge a state of a load body by analyzing signal data obtained by a displacement signal collection sensor which can collect a living body displacement signal of the load body supported by a load body supporting means, comprising: an average displacement inclination operating means to divide an original waveform of signal data obtained through said displacement signal collection sensor into each prescribed time range and determine a rate of change of the signal data in the prescribed time range as an average displacement inclination; an emphasis displacement inclination operating means to determine an emphasis displacement inclination by slide-calculating a rate of change of an average displacement inclination for each prescribed sampling time at a prescribed slide lap rate over prescribed number of times from time series data of said average displacement inclination so that the time series data of the emphasis displacement inclination is obtained; and a state judging means to judge a load body state from the time series data of the emphasis displacement inclination obtained by said emphasis displacement inclination operating means; wherein said displacement signal collection sensor is attached to the load body supporting means; wherein said average displacement inclination operating means comprises: an original waveform displacement inclination operating means to divide an original waveform of signal data obtained by said displacement signal collection sensor into each prescribed time range, and further divide it within the prescribed time range into a plurality of intervals, and obtain a rate of change for each interval as an original waveform displacement inclination; and an original waveform displacement inclination summing means to sum up each original waveform displacement inclination obtained by said original waveform displacement inclination operating means, wherein the sum up value obtained by said original waveform displacement inclination summing means is structured to be established as an average displacement inclination; wherein said state judging means comprises a type judging means to judge the type of the load body; and wherein said type judging means comprises a means to judge a load body to be a thing when the time series data of said emphasis displacement inclination are in transition within a prescribed range, and to be a person when in transition with an inclination change exceeding the prescribed range.