Coordinate-unified measurement system and coordinate-unified measurement method

Abstract

Provided is a coordinate-unified measurement system that can unify the coordinates of a plurality of measurement devices by a simple method and measure the attitude with high accuracy. 【Solution means】A coordinate-unified measurement system U for measuring the attitude of a structure constructed during the construction process of a sinking method is installed around the structure 1 and includes a plurality of measurement units 40 that scan on the side wall 10 of the structure 1, ···; one or more collimation units 30 for specifying the position and rotation direction of each of the plurality of measurement units 40, ···; a total station TS for measuring the position and orientation of one or more collimation units 30; and a control unit 60 as a calculation unit for calculating the settlement amount s, the inclination amount θ, and / or the eccentricity amount e based on the measurement results of a plurality of points on the side wall 10 of the structure 1. The control unit 60 as the calculation unit is configured to specify the positions and rotation directions of the plurality of measurement units 40 in a unified coordinate system based on the measured values of the reflection intensities from one or more collimation units 30.

Description

Technical Field

[0001] The present invention relates to a coordinate unified measurement system having a plurality of measurement devices for non - contact measurement of the amount of settlement, inclination, and / or eccentricity in an operation involving the sinking of a structure (hereinafter referred to as "sinking method"), such as the pneumatic caisson method or the open caisson method.

Background Art

[0002] Conventionally, in the sinking excavation of the sinking method, in order to ensure the sinking accuracy, the construction is carried out while ensuring the eccentricity, sinking amount, inclination, etc. of the caisson structure. Generally, regarding the eccentricity, a target seal or the like is attached to the structure, and this is measured by a total station (hereinafter referred to as TS) installed outside the caisson structure, and the sinking operation is carried out while grasping the eccentricity.

[0003] Also, regarding the sinking amount, the sinking operation is carried out while measuring with a settlement gauge or directly measuring the structure with a level. Further, regarding the inclination, for example, an inclinometer is attached to the structure, and the sinking operation is carried out while measuring the inclination during sinking (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, the measurement method using a conventional type TS including Patent Document 1 has a problem that the target seal may be blocked by the formwork materials or the like during construction and cannot be measured, and it is necessary to frequently replace the target seal (see FIG. 5). Also, in the management of settlement and inclination, it is necessary to separately prepare a settlement gauge and an inclinometer, which leads to an increase in cost.

[0006] Therefore, an object of the present invention is to provide a coordinate-unified measurement system that can unify the coordinates of a plurality of measuring devices by a simple method and measure the attitude with high accuracy.

Means for Solving the Problems

[0007] To achieve the above object, the coordinate-unified measurement system of the sinking construction method of the present invention includes a plurality of measurement units installed around a structure constructed during the construction process of the sinking construction method, the plurality of measurement units including a non-contact distance sensor, a rotation mechanism that rotates the distance sensor, and a rotation position detection unit that detects the rotation position of the distance sensor by the rotation mechanism; one or more collimation units for specifying the position and rotation direction of each of the plurality of measurement units; a total station for measuring the position and orientation of one or more of the collimation units; and a calculation unit that calculates the settlement amount, the inclination amount, and / or the eccentricity amount based on the measurement results of a plurality of points on the side wall of the structure, wherein the calculation unit is configured to specify the positions and rotation directions of the plurality of measurement units in a unified coordinate system based on the measured values of the reflection intensities from one or more of the collimation units.

Effects of the Invention

[0008] The coordinate-unified measurement system for the sinking construction method of the present invention includes a plurality of measurement units installed around the structure constructed during the construction process of the sinking construction method, the plurality of measurement units including a non-contact distance sensor, a rotation mechanism for rotating the distance sensor, and a rotation position detection unit for detecting the rotation position of the distance sensor by the rotation mechanism; one or more collimation units for specifying the position and rotation direction of each of the plurality of measurement units; a total station for measuring the position and orientation of one or more of the collimation units; and a calculation unit for calculating the settlement amount, inclination amount, and / or eccentricity amount based on the measurement results of a plurality of points on the side wall of the structure. The calculation unit is configured to specify the positions and rotation directions of the plurality of measurement units in a unified coordinate system based on the measured values of the reflection intensities from one or more of the collimation units. With such a configuration, the coordinates of a plurality of measurement units can be unified by a simple method, and the attitude can be measured with high accuracy.

Brief Description of the Drawings

[0009]

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Embodiments for Carrying Out the Invention

[0010] Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the components described in the following examples are illustrative, and are not intended to limit the technical scope of the present invention thereto.

Examples

[0011] (Overall Configuration of Coordinate Unification Type Measurement System) First, the configuration of the coordinate unification type measurement system U will be described with reference to FIG. 1. As shown in FIG. 1, the coordinate unification type measurement system U of this embodiment includes four measurement units 40,... installed around the housing 1 to measure the side wall of the housing 1, four sighting units 30,... arranged corresponding to each of the four measurement units 40,..., two total stations TS for measuring the position and orientation of the sighting unit 30, and an arithmetic unit (60; not shown, refer to FIG. 3) for calculating the settlement amount, tilt amount, and eccentricity amount. In FIG. 1, two total stations TS are drawn, but it is possible to handle with one total station TS by changing the installation.

[0012] As shown in the drawing, the four measurement units 40,... of this embodiment are each arranged at positions separated by 90 degrees (east, south, west, and north positions) around the housing 1. And corresponding to each measurement unit 40, four sighting units 30,... are respectively arranged in the direction opposite to the housing 1. Note that the measurement units 40 and the sighting units 30 are not limited to four, and two or more measurement units and sighting units may be provided.

[0013] That is, as shown in FIG. 2, the measurement unit 40 is disposed around (outside) the body 1 at a predetermined distance from the body 1. And the sighting unit 30 is disposed further outside at a greater distance from the measurement unit 40. The measurement unit 40 including the distance sensor 41 is preferably supported and installed by a support means such as a tripod. And, as will be described later, the rotation axis of the measurement unit 40 (the distance sensor 41 thereof) is oriented perpendicular to the direction facing the body 1 and is oriented to be substantially parallel to the plate surface of the sighting unit 30. Therefore, the central measurement unit 40 enables continuous measurement of both the side wall 10 of the body 1 and the sighting unit 30 in a series of operations.

[0014] Here, the separation distance of the measurement unit 40 from the body 1 is determined in consideration of the most reasonable distance and direction, taking into account the ground displacement, the replacement frequency, and the measurement accuracy. As described above, considering the measurement accuracy, the four measurement units 40,... are preferably installed at four locations near north (90 degrees), near west (180 degrees), near south (270 degrees), and near east (0 degrees), respectively. Even when the measurement unit 40 is displaced due to the subsidence excavation of the body 1, the sighting unit 30 is continuously scanned (in real time), and the position after displacement can be specified in real time, so there is no obstacle to the measurement.

[0015] (Configuration of the single posture measurement device S) Next, with reference to FIGS. 2 and 3, the configuration of the single (set of) posture measurement device S will be described more specifically. As shown in FIG. 3, the posture measurement device S mainly includes a measurement unit 40 and a control unit 60 as an arithmetic unit. And by adding a sighting unit (30) and a total station (TS) to each of these configurations, a coordinate unified measurement system (U) is configured (see FIG. 3).

[0016] The measurement unit 40 is a so-called 2D-LIDAR. As shown in FIGS. 2 and 3, it includes a non-contact distance sensor 41, a rotation mechanism 42 such as a motor and gear for rotating the distance sensor 41, and a rotation position detection unit 43 for detecting the rotation position of the distance sensor 41 by the rotation mechanism 42. Among these, the rotation mechanism 42 has a rotation axis perpendicular to the radial direction of the housing 1. Therefore, the distance sensor 41 of the measurement unit 40 can continuously scan a plurality of points in the vertical direction on the side wall of the housing 1. Further, the measurement unit 40 is capable of measuring the sighting unit 30 in a series of operations. Conversely, the sighting unit 30 is arranged on the scanning surface scanned by the measurement unit 40.

[0017] As described above, the measurement unit 40 including the distance sensor 41 is arranged around (outside) the housing 1. More specifically, for example, the measurement unit 40 (the distance sensor 41 thereof) of this embodiment is arranged at four locations separated by a central angle of 90 degrees around the housing 1 with the housing 1 as the center, as shown in FIG. 1.

[0018] The measurement value (reflection pulse) by the distance sensor 41 has a reflection intensity (relative intensity and magnitude of the reflection pulse). As characteristics of the object that affect this reflection intensity, the reflectivity of the material at the wavelength of the LIDAR, the smoothness or roughness of the surface, the orientation of the reflection surface with respect to the sensor, etc. can be considered. In this embodiment, among these, the difference in reflectivity based on the presence or absence of a special-shaped scan is detected as the reflection intensity. The special shape will be described later.

[0019] In this embodiment, for the sighting unit 30, two or more (a plurality of) sighting units 30,... are used. When using a plurality of sighting units 30,..., as shown in the figure, each sighting unit 30,... is preferably arranged at the east, south, west, and north positions outside the measurement unit 40 corresponding to the measurement units 40 arranged at the east, south, west, and north positions. However, the plurality of sighting units 30,... can be seen from the total station TS and can be arranged anywhere as long as they are in positions that can be scanned from the corresponding measurement unit 40.

[0020] And the sighting unit 30 of this embodiment is composed of a plurality of measurement units 40,... a specifying means for specifying the position and rotation direction of each, and a means to be measured for measuring the position and orientation of the sighting unit 30 itself by the total station TS. That is, the measurement unit 40 is indirectly positioned via the sighting unit 30. The specific configurations of this specifying means and the means to be measured will be described later.

[0021] The control unit 60 as the arithmetic unit is a general-purpose personal computer having, for example, a memory, a CPU, an SSD, etc. As its functional units, the control unit 60 has a settlement amount calculation unit 61 that calculates the settlement amount s based on the measurement results of a plurality of points on the side wall of the housing 1, an inclination amount calculation unit 62 that calculates the inclination amount θ, an eccentricity amount calculation unit 63 that calculates the eccentricity amount e based on the measurement data from the plurality of measurement units 40,..., and a coordinate unification unit 64 that specifies the coordinates of each of the plurality of measurement units 40,... in a unified coordinate system. (Refer to FIG. 4 for the settlement amount s, inclination amount θ, and eccentricity amount e.)

[0022] The settlement amount calculation unit 61 measures the positions of a plurality of equally spaced draft marks 10a,... installed on the side wall 10 of the housing 1 so that light and dark (e.g., black and white) can be distinguished, and calculates the change amount, thereby calculating the settlement amount s. The inclination amount calculation unit 62 calculates the inclination amount θ by measuring the angle based on the distance to the side wall 10. The eccentricity amount calculation unit 63 calculates the center of the housing 1 based on the measurement results of the distances to the plurality of side walls 10 and calculates the eccentricity amount. Among these, the settlement amount s can also be obtained by calculating the posture of the housing 1 based on each measurement value and then obtaining values on the central axis, values at each corner, etc. The function of the coordinate unification unit 64 will be described later.

[0023] The control unit 60 as the arithmetic unit may be installed at a remote location, near the site, or both. That is, the measurement data from the distance sensor 41 is sent to the control unit 60 through a cable. Furthermore, the data sent to the control unit 60 through the cable can also be transferred to a terminal at a remote location via the Internet.

[0024] In addition to the input value from the measurement unit 40, input means such as a keyboard 65 and a mouse 66 are connected to the control unit 60. Further, a monitor 71, another PC 72 for subsidence management, etc. are connected to the control unit 60 as output means. Since the point cloud data obtained on the side wall 10 of the housing 1 becomes singular points at the upper end and the lower end (ground surface), the side wall of the housing 1 can be clearly recognized on the coordinate axis of the distance sensor 41.

[0025] (Specific configuration of the sighting unit) Then, as shown in FIGS. 6 and 7, the sighting unit 30 of the present embodiment is composed of a plurality of measurement units 40, a specifying means for inversely specifying the position and rotation direction of each, and a measured means for measuring the position and orientation of the sighting unit 30 itself by a total station TS.

[0026] More specifically, as shown in FIG. 7, the sighting unit 30 has a sighting plate 31 on which a special figure is drawn as a specifying means, and three prisms 33, 34, 35 fixed to the sighting plate 31 as measured means. On the sighting plate 31, a vertical line 31a, a horizontal line 31b, and a diagonal line 31c are drawn in a manner where the light and dark are clearly distinguishable as special figures for inversely calculating the positions of the respective measurement units 40. Further, prisms 33, 34, 35 are installed at three of the four corners of the sighting plate 31.

[0027] More specifically, as shown in FIG. 7, on the sighting plate 31, a figure is drawn in which two rectangles with diagonals drawn are arranged vertically with one side shared in the same direction. Therefore, the sides of each rectangle become the vertical lines 31a, 31a and the horizontal lines 31b, 31b, and the diagonal lines become the diagonal lines 31c. Prisms 33, 34, 35 are respectively arranged at the upper left, upper right, and lower right positions of the sighting plate 31. Note that the prisms as measured means are not limited to these positions, and there may be at least three, or four or more.

[0028] During use, the side wall 10 of the housing 1 is continuously scanned by the measuring unit 40, a special figure on the sighting plate 31 is continuously scanned, and the direction and distance to the three prisms 33, 34, and 35 are measured by the total station TS.

[0029] (Method for Identifying Measurement Position Using Reflection Intensity) Next, a method for identifying the measurement position using the reflection intensity will be described.

[0030] 1) The distance sensor 41 of the measuring unit 40 rotates the measuring device, for example, every 0.125 degrees of the recognition angle, irradiates a laser beam in each direction while measuring the direction (angle), and receives the reflected light to measure (scan) the distance to the object corresponding to the angle.

[0031] 2) At this time, the distance sensor 41 also measures the reflection intensity, which is affected by the reflectivity of the reflected light. For example, in the case of a monochrome figure, the higher the whiteness, the higher the reflectivity, and the reflectivity decreases as the blackness deepens.

[0032] 3) Therefore, by drawing a white line on a black background panel, the reflection intensity can be recognized as a prominent large value only at the angle when passing through this line. Note that if there are variations in the skin reflectivity, it is not necessary to limit it to the combination of white and black.

[0033] 4) As described above, there is no need to identify the position on the panel with the rotation of the distance sensor 41 stopped as in the existing method. It is possible to identify one's own measurement position during continuous measurement, enabling more efficient coordinate unification.

[0034] 5) In addition, by thickening the line to be drawn, it is also possible to prevent non-detection of the measurement position and to recognize it as an average value at multiple locations to improve the accuracy (see FIGS. 6(a) and 6(b)). In addition, it is also preferable to improve the density of the reflection intensity measurement by relatively slowing down the rotation speed of the distance sensor 41.

[0035] The arithmetic unit, which is a functional unit of the control unit 60, includes functional units 61-63 that calculate the settlement amount s, tilt amount θ, and eccentricity amount e, and a functional unit 64 that unifies the coordinates of a plurality of measurement units 40, ... (that is, a function that specifies the positions and rotation directions of the plurality of measurement units 40, ... in a unified coordinate system). Then, with the functions of the control unit 60 to calculate the settlement amount s, tilt amount θ, and eccentricity amount e and the function to unify the coordinates of the plurality of measurement units 40, ..., the posture of the housing 1 can be accurately measured (actually measured and inferred). Among these, since the functions of calculating the settlement amount s, tilt amount θ, and eccentricity amount e have been described above, the description is omitted. Hereinafter, a method for unifying the coordinates of the plurality of measurement units 40, ... will be described.

[0036] (Method for Coordinate Unification) Here, an example of a coordinate unification method when measuring the posture of the housing 1 using a plurality of measurement units 40, ... will be described. This coordinate unification method is realized by executing the following steps 1) to 5).

[0037] 1) After constructing a lot up to the middle of the housing 1, fix a plurality of measurement units 40 (measurement range sensors), ... at the planned positions. Specifically, for example, install four measurement units 40, ... at four locations near the 0-degree (east) position, near the 90-degree (north) position, near the 180-degree (west) position, and near the 270-degree (south) position using tripods or the like.

[0038] 2) Further, corresponding to the measurement units 40, ..., install sighting units (dedicated disk surfaces) 30, ... for coordinate unification outside each measurement unit 40. Then, actually lower the housing 1.

[0039] 3) Each measurement unit 40 (measurement range sensor) continuously scans the side wall portion 10 of the housing 1 and the corresponding sighting unit (dedicated disk surface) 30, and measures its angle and distance. That is, while rotating the distance sensor 41 by the rotation mechanism 42 to measure the distance, the rotation angle is measured by the rotation position detection unit 43. At this time, a special figure (see FIGS. 6 and 7) is drawn on the collimation unit (dedicated panel) 30 for coordinate unification, and prisms 33, 34, and 35 for the total station TS are attached to three of the four corners. Therefore, the positional relationship between the positions scanned by the measurement unit 40 and the positions of the prisms 33, 34, and 35 can be recognized.

[0040] 4) Without moving the position of the collimation unit (dedicated panel) 30, for example, using a total station TS installed at a position where two collimation units 30, 30 can be overlooked, measure the three prisms 33, 34, and 35 respectively (see FIG. 7).

[0041] 5) Then, analyze the three-dimensional coordinates of each measurement unit 40 from the measurement results of the above 2) to 4) to achieve coordinate unification. This process of 2) to 4) can be implemented using four collimation units 30. Furthermore, the collimation unit 30 can also be implemented electronically using a commercially available tablet terminal or the like. Regarding the coordinate unification method, if necessary, it is possible to simplify the calculation conditions using various assumptions. Note that the coordinate unification is performed before the start of subsidence and may also be implemented during the construction process for the purpose of calibration.

[0042] The specific calculation can be implemented as follows. a) Based on the measured values, calculate the relative positional relationship between the positions and angles of the four measurement units 40 (distance sensors 41) and the positions of the four collimation units 30, ···. This method will be described next. b) Based on the measured values, calculate the relative positional relationship between the positions of the four collimation units 30, ··· and the total station TS. c) Based on the two positional relationships calculated in a) and b), calculate the relative positional relationship between the position of the total station TS and the positions and angles of the four measurement units 40 (distance sensors 41). That is, this means that coordinate unification has been achieved.

[0043] (Specification of the position and angle of the measurement unit using a special figure) Here, a method for specifying the position and angle of a measurement unit using a special figure will be described. 1) An example of a special figure is shown in FIG. 7. This figure has the shape of overlapping hypotenuses of right triangles of the same shape, and furthermore, two of them are overlapping. The background of the board surface is black, and the figure is drawn in white. 2) When continuously scanning this dedicated board surface with the distance sensor 41, only the positions of the figures drawn in white are recognized as prominent numerical values of the reflection intensity, and five points as shown in FIG. 8(a) can be recognized. 3) Based on the recognized points, it is possible to calculate the distance L. 4) If L can be specified, the angle can be specified (see FIG. 8(b)). θ = sin -1 (A / L) = θ1 or θ2 θ1 + θ2 = 180° 5) Furthermore, if L1, L2, L3, L4 can be specified, X1, Y1, X3, Y3, that is, point b and point d can be specified (see FIG. 9). X1 = B × L1 / (L1 + L2) Y1 = A × L1 / (L1 + L2) X3 = B × L3 / (L3 + L4) Y3 = A × L3 / (L3 + L4) Also, if X1 and X3 can be specified, it is possible to specify whether θ is θ1 or θ2 based on their magnitudes. 6) Also, if L1, L2, L3, L4 can be specified, then ΔX 11 , ΔX 12 , ΔX 21 , ΔX 22 , that is, point a, point c, and point e can be specified (see FIG. 10). X 01 = cosθ × (L1 + L2) X 02 = cosθ × (L3 + L4) ΔX 11 = X 01 × L2 / (L1 + L2) ΔX 12 = X 01 × L1 / (L1 + L2) ΔX 21 = X 02 × L4 / (L3 + L4) ΔX 22 = X 02 × L3 / (L3 + L4) 7) As described above, it becomes possible to specify the measurement coordinates of five points on the dedicated board surface. Since the positional relationship between the dedicated board surfaces is specified by using a separately prepared transit or the like for a plurality of dedicated board surfaces, it becomes possible to unify the coordinates of a plurality of distance sensors 41. 8) Although the description of the procedure is omitted, it is also possible to unify the coordinates by using shapes other than those shown this time (see, for example, FIG. 11), and the shape is not limited.

[0044] (Effect) Next, the effects exhibited by the coordinate unification type measurement system U of the present embodiment will be listed and described.

[0045] (1) As described above, the coordinate unification type measurement system U of the present embodiment is a coordinate unification type measurement system U that measures the attitude of the structure 1 in the sinking method, and is installed around the structure 1 and scans on the side wall 10 of the structure 1. A plurality of measurement units 40,... including a non-contact distance sensor 41, a rotation mechanism 42 that rotates the distance sensor 41, and a rotation position detection unit 43 that detects the rotation position of the distance sensor 41 by the rotation mechanism 42; One or more collimation units 30 for specifying the position and rotation direction of each of the plurality of measurement units 40,...; A total station TS for measuring the position and orientation of one or more collimation units 30; A control unit 60 as a calculation unit that calculates the settlement amount s, the inclination amount θ, and / or the eccentricity amount e based on the measurement results of a plurality of points on the side wall 10 of the structure 1; The control unit 60 as a calculation unit is configured to specify the positions and rotation directions of the plurality of measurement units 40 in a unified coordinate system based on the measured values of the reflection intensities from one or more collimation units 30. With such a configuration, the coordinates of a plurality of measurement units 40,... can be unified by a simple method, and the attitude can be measured with high accuracy. Furthermore, by unifying the coordinates in this way, a plurality of measurement values can be linked to other plurality of measurement values, and the attitude of the structure 1 can be predicted based on the measurement values.

[0046] (2) Further, one or more collimation units 30 include a specifying means for specifying the positions and rotational directions of a plurality of measurement units 40, ···, respectively, and a means to be measured for measuring the position and orientation of the collimation unit 30 itself by the total station TS. In this way, by intervening the specifying means and the means to be measured in the middle, the relative positions of the plurality of measurement units 40, ··· from the total station TS can be indirectly measured and calculated.

[0047] (3) Further, one or more collimation units 30 have, as the specifying means, a collimation plate 31 on which a special figure including a vertical line 31a, a horizontal line 31b, and a diagonal line 31c is drawn, and, as the means to be measured, at least three prisms 33, 34, 35 fixed to the collimation plate 31. Thus, with a simple configuration in terms of ratio, the specifying means and the means to be measured can be realized.

[0048] (4) Further, on the collimation plate 31 as the specifying means, a figure in which two rectangles with diagonals drawn are arranged in the same direction and share one side is drawn. Therefore, a special figure can be formed extremely easily and accurately, and the position and direction of the measurement unit 40 can be easily specified.

[0049] (5) Further, one or more collimation units 40, ··· are arranged on the scanning surface of the measurement unit 40, ··· and are arranged so that their positions and orientations can be observed by the total station TS. Therefore, by one scanning operation, the measurement of the side wall 10 and the grasping of its own position can be completed as a series of operations, enabling real-time measurement, accurate measurement, and extremely high work efficiency.

[0050] (6) Further, on the surface of the side wall facing the plurality of measurement units 40 in the housing 1, draft marks 10a are drawn at predetermined heights. Therefore, the settlement amount s can be measured in real time with almost no error. Further, not only the distance (the inclination amount θ in the front-rear direction) but also the left-right inclination can be measured by one measurement unit 40.

[0051] (7) And the coordinate unification measurement method using the coordinate unification measurement system U of this embodiment is the coordinate unification measurement method using the coordinate unification measurement system described in (5) above. It includes the steps of installing a plurality of measurement units 40, ···, the step of the plurality of measurement units 40, ··· measuring one or more collimation units 30, ···, the step of the total station TS measuring one or more collimation units 30, ···, the step of the control unit 60 as a calculation unit specifying the positions and rotational directions of the plurality of measurement units 40, ··· in a unified coordinate system based on the measured values of the reflection intensities from one or more collimation units 30, ···, the step of the plurality of measurement units 40, ··· with their positions and rotational directions specified in the unified coordinate system scanning on the side wall of the housing 1, and the step of the control unit 60 calculating the settlement amount s, the inclination amount θ, and / or the eccentricity amount e based on the measurement results. With such a configuration, the coordinates of a plurality of measurement units 40, ··· can be unified by a simple method, and the posture can be measured with high precision. Furthermore, by unifying the coordinates in this way, a plurality of measurement values can be linked to other plurality of measurement values, and the posture of the housing 1 can be predicted based on the measurement values.

[0052] As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes that do not deviate from the gist of the present invention are included in the present invention.

Explanation of Reference Numerals

[0053] 1: Housing; 10: Side wall; 10a: Draft mark; 30: Collimation unit; 31: Collimation plate; 31a: Vertical line; 31b: Horizontal line; 31c: Oblique line; 33, 34, 35: Prism; 40: Measurement unit; 41: Distance sensor; 42: Rotation mechanism; 43: Rotation position detection unit; 60: Control unit (calculation unit); 61: Settlement amount calculation unit; 62: Inclination amount calculation unit; 63: Eccentricity amount calculation unit; 64: Coordinate unification unit; 65: Keyboard; 66: Mouse; 71: Monitor; S: Posture measurement device; TS: Total station; U: Coordinate unified measurement system; s: Settlement amount; θ: Inclination amount; e: Eccentricity amount

Claims

1. A coordinate unification type measurement system for a sinking construction method, comprising: A plurality of measurement units installed around the structure constructed during the construction process of the sinking construction method, scanning the side wall of the structure, each measurement unit including a non-contact distance sensor, a rotation mechanism for rotating the distance sensor, and a rotation position detection unit for detecting the rotation position of the distance sensor by the rotation mechanism; One or more collimation units for specifying the position and rotation direction of each of the plurality of measurement units; A total station for measuring the position and orientation of one or more of the collimation units; An arithmetic unit for calculating the settlement amount, inclination amount, and / or eccentricity amount based on the measurement results of a plurality of points on the side wall of the structure; and The arithmetic unit is configured to specify the positions and rotation directions of the plurality of measurement units in a unified coordinate system based on the measured values of the reflection intensities from one or more of the collimation units. A coordinate unification type measurement system.

2. One or more of the collimation units include a specifying means for specifying the position and rotation direction of each of the plurality of measurement units, and a measured means for measuring the position and orientation of the collimation unit itself by the total station. The coordinate unification type measurement system according to Claim 1.

3. One or more of the collimation units include, as the specifying means, a collimation plate on which vertical lines, horizontal lines, and diagonal lines are drawn, and, as the measured means, at least three prisms fixed to the collimation plate. The coordinate unification type measurement system according to Claim 2.

4. On the collimation plate as the specifying means, a figure is drawn in which two rectangles with diagonals drawn are arranged with the same orientation and sharing one side. The coordinate unification type measurement system according to Claim 3.

5. One or more of the collimation units are arranged on the scanning surface of the measurement unit and are arranged so that their positions and orientations can be observed by the total station. The coordinate unification type measurement system according to any one of Claims 1 to 4.

6. On the side wall of the structure facing the plurality of measurement units, draft marks are drawn so that light and darkness can be discriminated for each predetermined height. The coordinate unification type measurement system according to Claim 5.

7. A coordinate unification type measurement method using the coordinate unification type measurement system according to Claim 5, comprising: A step of installing a plurality of the measurement units; The step in which the plurality of the measurement units measure one or a plurality of collimation units; The step in which the total station measures one or a plurality of collimation units; The step in which the calculation unit specifies the positions and rotational directions of the plurality of the measurement units in a unified coordinate system based on the measurement values of the reflection intensities from one or a plurality of the collimation units; The step in which the plurality of the measurement units whose positions and rotational directions are specified in the unified coordinate system scan on the side wall of the housing; A coordinate unification type measurement method including: the step in which the calculation unit calculates a subsidence amount, an inclination amount, and / or an eccentricity amount based on the measurement results.

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