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US 9,957,796 B2Granted
Tunnel boring machine
AssigneeHitachi Zosen Corporation
InventorToshiyuki Okada
Life of this patent
Estimating the term…
Abstract
The tunnel boring machine includes a data processing unit configured to obtain error data (Er) based on a current measurement value (Vp) of the strain sensor obtained at a current angle (θ) of the cutter head and a past corresponding measurement value (Vo) obtained at a corresponding angle corresponding to the current angle, to correct the current measurement data using the error data.
Claims6
A tunnel boring machine, comprising:
- a cutter head;
- a cutter support supporting the cutter head and configured to rotate with the cutter head;
- a cutter driving unit for rotationally driving the cutter head and the cutter support;
- a rotational angle sensing unit for sensing a rotational angle of the cutter head;
- a strain sensor provided in the cutter head or the cutter support;
- and
- a data processing unit for obtaining measurement data (F) of a force acting on the cutter head, based on a measurement result of the strain sensor,
- wherein the data processing unit is configured to obtain error data (Er) based on a current measurement value (Vp) of the strain sensor obtained at a current angle (θ) of the cutter head and a past corresponding measurement value (Vo) obtained at a rotational angle corresponding to the current angle, to correct the current measurement data using the error data.
5 more elements
Dependencies are inferred from the claim text.