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US 2025/0027794 A1Published application
Movement measurement system with method for reducing interpolation error
AssigneeNanowave, Inc.
InventorTetsuo Ohara
Life of this patent
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AssigneeNanowave, Inc.
InventorTetsuo Ohara
Estimating the term…
A system for measuring movement along a designated travel path includes an encoder assembly with a pair of encoder heads maintained a fixed distance apart. The encoder assembly is designed to simultaneously compile pairs of position measurements relative to a main track, with each encoder head utilizing a unique scale pitch. A signal processing unit in communication with the encoder assembly converts each pair of position measurements into the spatial domain and maps the calculated distance between position measurements. The signal processing unit identifies patterns in the mapped data which are directly attributable to interpolation error, for example, by performing either a fast Fourier transform or a discrete Fourier transform on the mapped data to yield spatial frequency peaks. Thereafter, the signal processing unit can filter out mapped data at the peak frequencies to minimize errors that may otherwise compromise encoder measurement accuracy.
A system for measuring movement along a travel path, the system comprising:
A system for measuring movement along a travel path, the system comprising:
A system for measuring movement along a travel path, the system comprising:
Dependencies are inferred from the claim text.