Segment roundness measuring device and segment roundness measuring method

Patent metadata

Field	Value
Publication number	US-9500078-B2
Application number	US-201314649699-A
Country	US
Kind code	B2
Filing date	Nov 12, 2013
Priority date	Jan 9, 2013
Publication date	Nov 22, 2016
Grant date	Nov 22, 2016

Abstract

A segment roundness measuring device including a correction means that corrects the positional deviation of the turning center of an erector turning portion resulting from eccentricity on the basis of an angle detected by an angle detector and distances measured by three or more distance meters arranged at angular positions different from each other in the erector turning portion.

First claim

The invention claimed is:

1. A segment roundness measuring device comprising:
an angle detector that detects a turning angle of an erector turning portion, a turning center of which is eccentric;
three or more distance meters that are arranged at angular positions different from each other in the erector turning portion and measure distances to an inner surface of a segment ring obtained by assembling segments in a ring shape; and
correction means that corrects a positional deviation of the turning center of the erector turning portion resulting from eccentricity on the basis of the angle detected by the angle detector and the distances measured by the three or more distance meters.

2. The segment roundness measuring device according to claim 1 , wherein
the three or more distance meters are circumferentially arranged at the angular positions different from each other in the erector turning portion so as to be at equal angular intervals or be line-symmetric.

3. The segment roundness measuring device according to claim 2 , wherein
the correction means is configured to correct the positional deviation of the turning center of the erector turning portion resulting from eccentricity by carrying out averaging on the basis of distance measurement values measured by the three or more distance meters at the same turning angle of the erector turning portion.

4. The segment roundness measuring device according to claim 1 , wherein
the correction means is configured to correct the positional deviation of the turning center of the erector turning portion resulting from eccentricity by carrying out averaging on the basis of distance measurement values measured by the three or more distance meters at the same turning angle of the erector turning portion.

5. The segment roundness measuring device according to claim 4 , wherein
the correction means is configured to correct the positional deviation of the turning center of the erector turning portion resulting from eccentricity by calculating an average distance by obtaining and averaging distances from the turning center to the inner surface of the segment ring associated with the distance meters by adding mounting distances from the turning center of the erector turning portion to mounting positions of the distance meters that are previously acquired to the distance measurement values measured by the three or more distance meters.

6. The segment roundness measuring device according to claim 5 , wherein
the correction means is configured to correct the positional deviation of the turning center of the erector turning portion resulting from eccentricity at every prescribed turning angle of the erector turning portion by calculating the average distance at every prescribed turning angle, and further acquire roundness of the segment ring by converting a plurality of the average distances calculated at every prescribed turning angle to a plurality of X-Y coordinate values and correcting a center position of the segment ring on the basis of the plurality of X-Y coordinate values.

7. A segment roundness measuring method comprising steps of:
detecting a turning angle of an erector turning portion, a turning center of which is eccentric and measuring distances to an inner surface of a segment ring at the same turning angle as the turning angle that has been detected by three or more distance meters arranged at angular positions different from each other in the erector turning portion; and
correcting a positional deviation of the turning center of the erector turning portion resulting from eccentricity by carrying out averaging on the basis of distance measurement values measured by the three or more distance meters at the same turning angle of the erector turning portion.

8. The segment roundness measuring method according to claim 7 , wherein
the step of correcting the positional deviation of the turning center of the erector turning portion resulting from eccentricity includes a step of calculating an average distance by obtaining and averaging distances from the turning center to the inner surface of the segment ring associated with the distance meters by adding mounting distances from the turning center of the erector turning portion to mounting positions of the distance meters that are previously acquired to the distance measurement values measured by the three or more distance meters, and correcting the positional deviation of the turning center of the erector turning portion resulting from eccentricity at every prescribed turning angle of the erector turning portion by calculating the average distance at every prescribed turning angle,
the segment roundness measuring method further comprising a step of acquiring roundness of the segment ring by converting a plurality of the average distances calculated at every prescribed turning angle to a plurality of X-Y coordinate values and correcting a center position of the segment ring on the basis of the plurality of X-Y coordinate values.

Assignees

• Hitachi Shipbuilding Eng Co

Inventors

• Okada Toshiyuki

Classifications

• G01B21/22

  for measuring angles or tapers; for testing the alignment of axes · CPC title

• E21D9/06

  Making by using a driving shield {, i.e. advanced by pushing means bearing against the already placed lining (pushing prefabricated elements through the ground from an access pit E21D9/005)} · CPC title

• G01B21/20

  for measuring contours or curvatures, e.g. determining profile · CPC title

• G01B11/2408

  for measuring roundness · CPC title

• E21D11/40 Primary

  Devices or apparatus specially adapted for handling or placing units of linings {or supporting units} for tunnels or galleries {(combined with tunnelling shields E21D9/06)} · CPC title