Surveying system and surveying method

Abstract

To provide a survey system and a survey method that allow rapid and accurate automatic measurement to be performed using a total station.SOLUTION: A survey system surveys positional information of a construction machine used in a pit of a tunnel, by automatically collimating a plurality of targets (construction machine targets 1a, 1b) mounted on the construction machine, using a total station (TS 2) arranged in the tunnel. The survey system is equipped with: a survey server 5 for setting a plurality of search ranges in which the construction machine is assumed to be arranged, on the basis of finished shape information of the tunnel; and a survey instruction terminal 3 which is mounted on the construction machine and receives a selection input of the search ranges. The TS 2 automatically collimates the targets within left and right search angles according to the search range for which a selection input has been received by the survey instruction terminal.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a surveying system and a surveying method for measuring the position coordinates of construction machinery used in a tunnel pit.

Background Art

[0002] When giving position coordinates to construction machinery such as a drill jumbo used in a tunnel pit, it is necessary to mount a plurality of prisms on the construction machinery and measure the positions of the plurality of prisms by a total station (see, for example, Patent Document 1). When the distances between the measured plurality of prisms match a preset value, they are determined to be those of the construction machinery to be measured. Then, based on the positions of the plurality of prisms, the construction machinery can recognize its position coordinates in the tunnel and its postures (pitching angle, rolling angle, and yawing angle) with respect to the tunnel planned line as position information.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a tunnel pit, a plurality of construction machines are used, and it is required to measure the position coordinates of each construction machine. For example, when performing parallel automatic driving with a plurality of construction machines installed in parallel near the face, it is necessary to give position information (position coordinates + posture) to any of the plurality of construction machines.

[0005] However, when multiple construction machines are installed in parallel, the prisms mounted on different machines are aligned at a narrow angle. Therefore, when performing automatic measurements with a total station, it is often difficult to determine which prism belongs to the same construction machine, resulting in measurement errors. Furthermore, since automatic measurement with a total station relies on detecting prisms based on the degree of light reflection, it may detect reflective objects other than the prism being measured, which delays the process and prevents the measurement from being completed in the shortest possible time.

[0006] This invention has been made in view of the above circumstances, and aims to solve the aforementioned problems and provide a surveying system and surveying method that can perform automatic measurements using a total station quickly and accurately, even when multiple construction machines are installed in parallel. [Means for solving the problem]

[0007] The present invention relates to a surveying system that measures the positional information of construction machinery used inside a tunnel by automatically aiming at a plurality of targets mounted on the construction machinery using a total station placed in the tunnel, and comprises a surveying server that sets a plurality of search ranges in which the placement of the construction machinery is assumed based on the completed tunnel information, and a surveying instruction terminal mounted on the construction machinery that receives input for selection of the search range, wherein the total station automatically aims at the targets within the left and right search angles corresponding to the search range selected by the surveying instruction terminal. Furthermore, in the surveying system of the present invention, the surveying server may set different search ranges for each type of construction machine, and the total station may automatically sight the target within left and right search angles corresponding to the search range selected by the surveying instruction terminal and the type of construction machine on which the surveying instruction terminal that received the selection input for the search range is mounted. Furthermore, in the surveying system of the present invention, the surveying server may set different search ranges in the vertical direction for each type of construction machine, and the total station may automatically sight the target within the vertical and horizontal search angles corresponding to the search range selected by the surveying instruction terminal and the type of construction machine on which the surveying instruction terminal that received the selection input for the search range is mounted. Furthermore, in the surveying system of the present invention, the target is equipped with a shutter mechanism for opening and closing the sighting plane, and the surveying indicator terminal may sequentially open one of the targets in accordance with the sighting operation of the total station. Furthermore, the present invention relates to a surveying method for surveying the positional information of a construction machine used inside a tunnel by automatically aiming at a plurality of targets mounted on the construction machine using a total station placed in the tunnel, wherein a plurality of search ranges in which the placement of the construction machine is assumed are set based on the completed tunnel information, a surveying instruction terminal mounted on the construction machine receives input for selection of the search range, and the total station automatically aims at the targets within the left and right search angles corresponding to the search range selected by the surveying instruction terminal. [Effects of the Invention]

[0008] According to the present invention, even when multiple construction machines are installed in parallel, the total station can limit the illumination angle, allowing for quick and accurate sighting of targets mounted on the construction machines, and enabling quick and accurate automatic measurement using the total station. [Brief explanation of the drawing]

[0009] [Figure 1] This is a diagram showing the configuration of the surveying system according to the present invention. [Figure 2] This block diagram shows the configuration of the survey instruction terminal and survey server as shown in Figure 1. [Figure 3] This figure shows an example of the range request screen for the survey instruction terminal shown in Figure 2. [Figure 4] This figure shows an example of search range information, as shown in Figure 2. [Figure 5] This is a sequence diagram illustrating the surveying operation using the surveying system according to the present invention. [Figure 6] This figure shows a modified example of the search range information shown in Figure 2. [Figure 7] This figure shows a modified example of the search range information shown in Figure 2. [Modes for carrying out the invention]

[0010] Next, embodiments for carrying out the present invention (hereinafter simply referred to as "embodiments") will be specifically described with reference to the drawings. The surveying system of this embodiment is a system that measures the position coordinates of a construction machine 10, such as a drill jumbo, used inside a tunnel, and its attitude relative to the planned tunnel line (pitching angle, rolling angle, and yawing angle) as positional information. Referring to Figure 1, the surveying system comprises a construction machine target 1 mounted on the construction machine 10, a total station (hereinafter referred to as TS) 2 for sighting the construction machine target 1, a survey instruction terminal 3 mounted on the construction machine 10 that instructs TS2 to sight the construction machine target 1, an inclinometer 4 mounted on the construction machine 10 that measures the pitching angle of the construction machine 10, and a surveying server 5 that manages the measurement results of the construction machine target 1 by TS2. TS2, the survey instruction terminal 3, and the surveying server 5 are all equipped with communication functions such as wireless LAN and are configured to communicate directly or indirectly.

[0011] The construction equipment target 1 includes a sighting plane (prism) that reflects the light used for distance and angle measurement projected from TS2 back to TS2, and a shutter mechanism that opens and closes the sighting plane. The shutter mechanism of the construction equipment target 1 is controlled to open and close by the surveying instruction terminal 3.

[0012] Two construction machine targets 1 (1a, 1b) are mounted on a construction machine 10 such as a drill jumbo at intervals in the left - right direction. In the example shown in Fig. 1, two construction machines 101, 102 are installed in parallel near the face in the tunnel pit. On construction machine 101, two construction machine targets 1a1, 1b1 are mounted, and on construction machine 102, two construction machine targets 1a2, 1b2 are mounted respectively.

[0013] TS2 has a function as an optical wave distance measuring instrument that measures the distance to the construction machine target 1 by aiming at the construction machine target 1 (projecting light for distance measurement angle towards the construction machine target 1 and receiving the reflected light), and a function as a theodolite that measures the angle with the construction machine target 1. Also, TS2 has an automatic aiming function that automatically aims at the construction machine target 1 existing within the search range, and an automatic tracking function that automatically tracks the construction machine target 1.

[0014] When TS2 receives a measurement instruction notification from, for example, the surveying instruction terminal 31, it executes a first aiming operation to automatically aim at the construction machine target 1 existing within the search range specified by the surveying server 5. When the aiming is successful, it sends a first aiming success notification to the surveying instruction terminal 31. After sending the first aiming success notification, TS2 executes a second aiming operation to automatically aim at the construction machine target 1 existing within the search range. When the aiming is successful, it sends a second aiming success notification to the surveying instruction terminal 31 and transmits the measurement results (angle and distance) obtained by the first aiming operation and the second aiming operation to the surveying server 5.

[0015] The surveying instruction terminal 3 is an information processing device such as a computer that operates under program control and is mounted on each construction machine 10. The surveying instruction terminal 3 is composed of, for example, a tablet - type terminal device, a mobile terminal device, etc. In the example shown in Fig. 1, on construction machine 101, a surveying instruction terminal 31 is mounted, and on construction machine 102, a surveying instruction terminal 32 is mounted respectively.

[0016] Referring to FIG. 2, the measurement instruction terminal 3 includes an input unit 31, an output unit 32, a terminal storage unit 33, a terminal communication unit 34, and a terminal control unit 35. The input unit 31 and the output unit 32 are, for example, a touch panel that also serves to receive various instruction inputs and display data.

[0017] The terminal storage unit 33 is a storage means such as a semiconductor memory or an HDD (Hard Disk Drive), and stores the construction machine ID. The construction machine ID is identification information for specifying the construction machine 10 on which the measurement instruction terminal 3 is mounted.

[0018] The terminal communication unit 34 has a data communication function for transmitting and receiving various data to and from the TS2 and the measurement server 5 via a network such as a LAN.

[0019] The terminal control unit 35 is an information processing unit such as a microcomputer including a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), etc. A control program for controlling the operation of the measurement instruction terminal 3 is stored in the ROM. The terminal control unit 35 reads out the control program stored in the ROM and expands the control program in the RAM, thereby functioning as a range reception unit 351, a shutter opening / closing unit 352, and a measurement instruction transmission unit 353.

[0020] The range reception unit 351 causes the output unit 32 to display a range reception screen 6 as shown in FIG. 3. On the range reception screen 6, a range selection button 61 for selecting and inputting the search range of the construction machine targets 1a and 1b of the construction machine 10 and a measurement start button 62 for instructing measurement start are laid out. In the screen example shown in FIG. 3, the range selection button 61 selects any one of the search ranges of "left range", "middle range", and "right range" toward the cutting edge. The range reception unit 351 receives the selection input of the search range and the measurement instruction based on the operations of the range selection button 61 and the measurement start button 62.

[0021] The shutters of construction machine targets 1a and 1b are closed when in standby mode. When the range receiving unit 351 receives a measurement instruction, the shutter opening / closing unit 352 opens the shutter of one (construction machine target 1a) and keeps the shutter of the other (construction machine target 1b) closed. Next, when the first sighting success notification is received from TS2, the shutter opening / closing unit 352 closes the shutter of one (construction machine target 1a) and opens the shutter of the other (construction machine target 1b). Next, when the second sighting success notification is received from TS2, the shutter opening / closing unit 352 returns both (construction machine targets 1a and 1b) shutters to their standby closed state.

[0022] When the range receiving unit 351 receives a measurement instruction, the measurement instruction transmission unit 353 sends a measurement instruction notification to TS2 and the other survey instruction terminals 3. When the other survey instruction terminals 3 receive the measurement instruction notification, they stop accepting input of measurement instructions.

[0023] Furthermore, when the range receiving unit 351 receives a measurement instruction, the measurement instruction transmission unit 353 transmits the construction machine ID, the search range selected, and the inclination angle of the construction machine 10 measured by the inclinometer 4 to the surveying server 5.

[0024] The surveying server 5 is an information processing device such as a computer that operates under program control and is installed at a base location such as an office. The surveying server 5 is composed of, for example, a desktop terminal device.

[0025] Referring to Figure 2, the surveying server 5 comprises a server storage unit 51, a server communication unit 52, and a server control unit 53.

[0026] The server storage unit 51 is a storage means such as semiconductor memory or HDD (Hard Disk Drive), and stores tunnel information (linear information, cross-sectional information) 511, construction equipment information 512, and search range information 513.

[0027] Tunnel information 511 includes excavation instruction information such as the planned tunnel line as specified in the excavation instruction document, information on the actual excavated tunnel (tunnel alignment information, cross-sectional information), the position coordinates of known points inside the tunnel, and the coordinates of the instrument point where the TS2 was installed. The tunnel completion information is updated in a timely manner through a link with the tunnel's CIM (Construction Information Modeling / Management) integrated management system 7. In addition, past instrument point coordinates are added as reference point position coordinates using the new instrument point coordinates as needed.

[0028] The construction equipment information 512 includes the construction equipment ID of the construction machine 10, the type of construction machine 10, and the mounting positions of the construction equipment targets 1a and 1b.

[0029] The search range information 513 is information indicating the search range for automatically aiming at the construction machine target 1, which is set based on the assumed installation status of the construction machine 10. In this embodiment, as shown in Figure 4, the search range information 513 includes a "left range" and a "right range" set based on the assumption of two construction machines 10 installed in parallel near the tunnel face, and a "middle range" set based on the assumption of one construction machine 10 installed alone near the tunnel face.

[0030] The server communication unit 52 has a data communication function that sends and receives various data between the TS2 and the survey instruction terminal 3 via a network such as a LAN.

[0031] The server control unit 53 is an information processing unit such as a microcomputer equipped with a CPU (Central Processing Unit), ROM (Read Only Memory), RAM (Random Access Memory), etc. The ROM stores a control program for controlling the operation of the surveying server 5. The server control unit 53 reads the control program stored in the ROM and loads the control program into the RAM, thereby functioning as the search range setting unit 531 and the position information calculation unit 532.

[0032] When the tunnel completion information is updated, the search range setting unit 531 sets the search range information 513 ("left range", "right range", "middle range") based on the updated tunnel completion information. In the example shown in Figure 4, three search ranges are set as the search range information 513, but the number and area of ​​the search ranges can be set as appropriate according to the expected arrangement of the construction machinery 10. Furthermore, when the search range setting unit 531 receives the search range from the survey instruction terminal 3, it transmits the left and right search angles corresponding to the search range to the TS2.

[0033] The position information calculation unit 532 calculates the position coordinates of the construction machine 10 inside the tunnel and its attitude relative to the tunnel plan line (pitching angle, rolling angle, and yawing angle) as position information, based on the measurement results (angle and distance) from the first and second sighting operations of the TS2 and the inclination angle of the construction machine 10 measured by the inclinometer 4. The position information calculated by the position information calculation unit 532 is transmitted to the vehicle control system 8 of the construction machine 10, allowing the construction machine 10 to recognize its position inside the tunnel.

[0034] Next, the surveying method for the construction machine 101 using TS2 will be explained in detail with reference to Figure 5. First, the operator sets up the TS2 in a position where the construction machinery 101 to be used near the tunnel face can be seen, and determines the instrument point coordinates of the TS2 by sighting multiple reference points whose position coordinates are known. The measurement results of the reference points by the TS2 are transmitted to the survey server 5, and the TS2 enters a standby state, waiting to receive a measurement instruction notification.

[0035] Upon receiving the measurement results of the reference point from TS2, the server control unit 53 of the surveying server 5 functions as a position information calculation unit 532 and calculates the instrument point coordinates of TS2 using the position coordinates of the reference point. The calculated instrument point coordinates are stored as tunnel information 511 in the server storage unit 51.

[0036] Once the operator positions the construction machine 101 at a working position near the tunnel face, they operate the survey instruction terminal 31 to instruct the construction machine 101 to begin surveying. The range receiving unit 351 of the survey instruction terminal 31 receives input for selecting the search range of the construction machine 101 (construction machine targets 1a1, 1b1) by operating the range selection button 61 on the range receiving screen 6 displayed on the output unit 32 (step S101), and receives a measurement instruction by operating the measurement start button 62 (step S102).

[0037] When a measurement instruction is received in step S102, the measurement instruction transmission unit 353 sends a measurement instruction notification to TS2 and other survey instruction terminals 3, and also sends the construction machine ID, the search range selected in the input, and the inclination angle of the construction machine 101 measured by the inclinometer 41 to the survey server 5. The measurement instruction notification is also sent to other survey instruction terminals 32, and when the other survey instruction terminals 32 receive the measurement instruction notification, they stop accepting measurement instruction inputs.

[0038] Furthermore, upon receiving a measurement instruction in step S102, the shutter opening / closing unit 352 opens the shutter of one of the construction equipment targets (1a1) and maintains the shutter of the other (1b1) in a closed state (step S103).

[0039] When the search range setting unit 531 of the survey server 5 receives a search from the survey instruction terminal 31 in step S102 (step S104), it transmits the left and right search angles corresponding to the search range received in step S102 to TS2.

[0040] When TS2 receives a measurement instruction in step S102, it performs a first sighting operation to automatically sight the construction equipment target 1 located within the left and right search angles received from the surveying server 5 (step S105).

[0041] In the first sighting operation, only the shutter of one of the targets (construction equipment target 1a1) is open, and when TS2 successfully sights the target, it sends a notification of first sighting success to the survey instruction terminal 31. In the first sighting operation, the illumination angle can be limited and the sighting target can be limited to the construction equipment target 1a1, so TS2 can sight the construction equipment target 1a1 quickly and accurately.

[0042] When the shutter opening / closing unit 352 of the survey instruction terminal 3 receives a notification of first sighting success from TS2, it closes the shutter of one (construction machine target 1a1) and opens the shutter of the other (construction machine target 1b1) (step S106).

[0043] Next, upon receiving the measurement instruction in step S102, TS2 performs a second sighting operation (step S107) to automatically sight the construction equipment target 1 located within the left and right search angles received from the surveying server 5. In the second sighting operation, the illumination angle can be limited and the sighting target can be limited to the construction equipment target 1b, allowing TS2 to quickly and accurately sight the construction equipment target 1b.

[0044] In the second sighting operation, only the shutter of the other object (construction equipment target 1b1) is open. When TS2 successfully sights the other object (construction equipment target 1b1), it sends a second sighting success notification to the survey instruction terminal 31.

[0045] When the shutter opening / closing unit 352 of the survey instruction terminal 3 receives a notification from TS2 indicating the success of the second sighting, it switches to a standby state in which both shutters (construction machine targets 1a1 and 1b1) are closed (step S108), and the series of operations ends.

[0046] Next, TS2 transmits the measurement results (angle and distance) from the first and second sighting operations to the surveying server 5 (step S109), and ends the series of operations.

[0047] When the position information calculation unit 532 of the surveying server 5 receives the measurement results from TS2 in step S109, it calculates them as position information (step S110) and ends the series of operations. The position information is transmitted from the surveying server 5 to the vehicle control system 8 of the construction machine 101, so that the construction machine 101 can recognize its position information inside the tunnel. Based on the measurement results (angle and distance) from the first and second sighting operations of TS2 received in step S109 and the inclination angle of the construction machine 101 measured by the inclinometer 41 received in step S102, the position information calculation unit 532 calculates the position coordinates of the construction machine 101 inside the tunnel and its attitude relative to the tunnel plan line (pitching angle, rolling angle and yawing angle) as position information.

[0048] In this embodiment, the position information of the construction machine 10 was measured using two construction machine targets and an inclinometer 4, but the position information of the construction machine 10 may also be measured using three construction machine targets 1. In this case as well, it is preferable to open the shutter of only one of the three construction machine targets 1 and sequentially perform the sighting operation. The inclination angle measured by the inclinometer 4 can be calculated using the three construction machine targets.

[0049] The position coordinates of the measurement targets placed inside the tunnel are stored as tunnel information 511, and the search range setting unit 531 should set the search range information 513 ("left range", "right range", "middle range") while avoiding the measurement targets. In this case, the measurement targets can be excluded from the illumination angle of TS2, so TS2 can quickly and accurately sight the target construction machine target 1.

[0050] Furthermore, the survey server 5 may store the position coordinates of the measurement target as tunnel information 511. If the position coordinates of the measurement target are known, the survey server 5 can calculate a travel route that avoids the measurement target for the construction machine 10, which has been automatically sighted by the TS2. The survey server 5 may also calculate a travel route that avoids other construction machines 10 after the TS2 has been surveyed for the construction machine 10. The travel route calculated by the survey server 5 may be provided to the survey instruction terminal 3 as travel guidance, or it may be provided to the vehicle control system 8 of the construction machine 10 for automatic driving.

[0051] The search range setting unit 531 should set different search range information 513 ("left range", "right range", "middle range") for each type of construction machine 10. For example, as shown in Figure 6, the search range setting unit 531 sets search range A for each expected work area of ​​the construction machine 10 (types A, B, C) 1~3 B 1~2 , C 1~4 In this case, when the search range setting unit 531 receives the search range and equipment ID from the survey instruction terminal 3, it transmits the left and right search angles corresponding to the search range and construction machine ID to the TS2. This allows the search range to be limited to the type of construction machine 10, so that the TS2 can sight the target construction machine 1 more quickly and accurately.

[0052] Furthermore, the search range setting unit 531 should also set the vertical search range as different search range information 513 for each type of construction machine 10. For example, as shown in Figure 7, the search range setting unit 531 sets the vertical search range A according to the height of the construction machine targets 1a and 1b mounted on the construction machine 10 (types A, B, and C). 1~3 B 1~2 , C 1~4In this case as well, when the search range setting unit 531 receives the search range and equipment ID from the survey instruction terminal 3, it transmits the up, down, left, and right search angles corresponding to the search range and construction machine ID to the TS2. This allows the vertical search range to be limited according to the type of construction machine 10, so that the TS2 can sight the target construction machine 1 more quickly and accurately.

[0053] As described above, this embodiment is a surveying system that measures the position information of a construction machine 10 used inside a tunnel by automatically aiming at multiple targets (construction machine targets 1a, 1b) mounted on the construction machine 10 using a total station (TS2) placed in the tunnel. The system comprises a surveying server 5 that sets multiple search ranges in which the placement of the construction machine 10 is assumed based on the completed tunnel information, and a surveying instruction terminal 3 mounted on the construction machine 10 that accepts input for selection of a search range. The TS2 automatically aims at the targets within the left and right search angles corresponding to the search range selected by the surveying instruction terminal. This configuration allows TS2 to limit its illumination angle even when multiple construction machines are installed in parallel, enabling quick and accurate sighting of the construction machine target 1, and allowing for quick and accurate automated measurement using TS2.

[0054] Furthermore, in this embodiment, the survey server 5 sets different search ranges for each type of construction machine 10, and automatically aims at the construction machine targets 1a and 1b within the left and right search angles corresponding to the search range selected by the TS2 and the survey instruction terminal 3, and the type of construction machine 10 on which the survey instruction terminal 3 that received the selection input for the search range is mounted. This configuration allows the search range to be limited according to the type of construction machine 10, enabling TS2 to sight the target construction machine 1 more quickly and accurately.

[0055] Furthermore, in this embodiment, the surveying server 5 sets different search ranges in the vertical direction for each type of construction machine 10, and the TS2 automatically aims at the construction machine targets 1a and 1b within the vertical and horizontal search angles corresponding to the search range selected by the surveying instruction terminal 3 and the type of construction machine 10 on which the surveying instruction terminal 3 that received the selection input for the search range is mounted. This configuration allows the vertical search range to be limited according to the type of construction machine 10, enabling the TS2 to sight the target construction machine 1 more quickly and accurately.

[0056] Furthermore, in this embodiment, the construction equipment targets 1a and 1b are equipped with shutter mechanisms that open and close their sighting surfaces, and the surveying instruction terminal 3 sequentially opens the construction equipment targets 1a and 1b in accordance with the sighting operation of the TS2. This configuration allows the TS2 to limit its sighting target to a single construction equipment target, enabling it to sight the construction equipment target quickly and accurately.

[0057] The present invention has been described above based on the embodiments. These embodiments are illustrative, and it will be understood by those skilled in the art that various modifications are possible in the combination of these components, and that such modifications also fall within the scope of the present invention. [Explanation of Symbols]

[0058] 1, 1a, 1b Construction equipment target 2. Total Station (TS) 3. Surveying instruction terminal 4 Inclinometer 5. Surveying Server 6. Range Request Screen 7. Integrated CIM Management System 8. Vehicle control system 10 Construction Machinery 31 Input section 32 Output section 33 Terminal Storage Unit 34 Terminal Communication Unit 35 Terminal Control Unit 51 Server Storage Unit 52 Server Communication Section 53 Server Control Unit 61 Range Selection Button 62 Start Measurement Button 351 Range Reception Section 352 Shutter opening / closing mechanism 353 Measurement instruction transmission unit 511 Tunnel Information 512 Construction Equipment Information 513 Search range information 531 Search range setting section 532 Location information calculation unit

Claims

1. A surveying system that measures the position information of construction machinery used inside a tunnel by automatically aiming at multiple targets mounted on the construction machinery using a total station placed in the tunnel, A surveying server sets multiple search ranges where the placement of the construction machinery is assumed, based on the completed tunnel information, The construction machine is equipped with a surveying instruction terminal that accepts input for selecting the search range, The total station is a surveying system characterized by automatically sighting the target within the left and right search angles corresponding to the search range selected by the surveying instruction terminal.

2. The surveying server sets different search ranges for each type of construction machine, The surveying system according to claim 1, characterized in that the total station automatically sights the target within left and right search angles corresponding to the search range selected by the surveying instruction terminal and the type of construction machine on which the surveying instruction terminal that received the selection input for the search range is mounted.

3. The surveying server sets different search ranges in the vertical direction for each type of construction machine. The surveying system according to claim 2, characterized in that the total station automatically sights the target within the up, down, left, and right search angles corresponding to the search range selected by the surveying instruction terminal and the type of construction machine on which the surveying instruction terminal that received the selection input for the search range is mounted.

4. The target is equipped with a shutter mechanism that opens and closes the sighting plane, The surveying system according to claim 1, characterized in that the surveying instruction terminal sequentially opens one of the targets in accordance with the sighting operation of the total station.

5. A surveying method for measuring the position information of construction machinery used inside a tunnel by automatically aiming at multiple targets mounted on the construction machinery using a total station placed in the tunnel, Based on the tunnel construction information, multiple search ranges are set where the placement of the construction machinery is assumed. The surveying instruction terminal mounted on the construction machine receives the input for selecting the search range. The surveying method is characterized in that the total station automatically sights the target within the left and right search angles corresponding to the search range selected by the surveying instruction terminal.

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