Signal processing device, control method thereof, control procedure and recording medium
AssigneeOMRON Corporation
InventorsHiroki Miyake, Toshiyuki Kojima
Life of this patent
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Abstract
The invention is adapted to properly suppress noises of various frequency bands. An input unit (10) includes an acquiring element (11) for periodically acquiring signals from a load cell, so as to obtain time series signals; a plurality of frequency filters (121-123) for filtering the time series signals according to frequencies; and a transfer element (13) for transferring the signal filtered by at least one of the frequency filters (121-123) according to the frequency to a control device (90). The suppressed frequency bands of the frequency filters (121-123) are not repeated.
Claims14
A signal processing device, adapted to filter signals coming from a load cell measuring a weight of at least one work and transfer the signals to a control device, the signal processing device comprising:
- a data acquiring circuit, periodically acquiring the signals from the load cell, so as to obtain the signals of a time series as time series signals;
- a plurality of frequency filters, filtering the time series signals acquired by the data acquiring circuit according to frequencies, wherein frequency bands suppressed by the frequency filters are not repeated, and each of the plurality of frequency filters is preset with an inherent vibration frequency of an inertial system including the at least one work being measured and a weighing platform where the at least one work is placed, wherein the plurality of frequency filters are switched by detecting a change of the at least one work being measured;
- and
- a transfer circuit, transferring the signal filtered by at least one of the frequency filters according to the frequency to the control device.
A control method of a signal processing device, adapted to filter signals coming from a load cell measuring a weight of at least one work and transfer the signals to a control device, the control method of the signal processing device comprising:
- a data acquiring step, periodically acquiring the signals from the load cell, so as to obtain the signals of a time series as time series signals;
- a filtering step, filtering the time series signals acquired in the data acquiring step according to frequencies, wherein at least one of a plurality of frequency filters with suppressed frequency bands being not repeated is used to perform the filtering step, each of the plurality of frequency filters is preset with an inherent vibration frequency of an inertial system including the at least one work being measured and a weighing platform where the at least one work is placed, and the plurality of frequency filters are switched by detecting a change of the setup of the at least one work being measured;
- and
- a transfer step, transferring the signal obtained by performing filtering according to the frequency in the filtering step to the control device.
A signal processing device, adapted to filter signals coming from a load cell measuring a weight of at least one work and transfer the signals to a control device, the signal processing device comprising:
- a processor, configured to periodically acquire the signals from the load cell, so as to obtain the signals of a time series as time series signals;
- and
- a plurality of frequency filters, filtering the time series signals acquired by the processor according to frequencies, wherein frequency bands suppressed by the frequency filters are not repeated, and each of the plurality of frequency filters is preset with an inherent vibration frequency of an inertial system including the at least one work being measured and a weighing platform where the at least one work is placed, and the plurality of frequency filters are switched by detecting a change of the at least one work being measured,
- wherein the processor is further configured to transfer the signal filtered by at least one of the frequency filters according to the frequency to the control device.
Dependencies are inferred from the claim text.