Progress management system and progress management method

Abstract

To propose a progress management system and a progress management method which improve the work efficiency of a tunnel construction work.SOLUTION: A progress management system comprises: a beacon 3 which is attached to a monitoring object (construction machine 6, worker 7) in a tunnel; a plurality of receivers 4 which are arranged so as to be apart from each other at a prescribed interval in a direction heading toward a pit mouth from a pit face from the tunnel; and a processing device 1 which generates position information and operation information of the monitoring object on the basis of the receiver 4 that has received the first radio wave with the intensity being equal to or greater than a first threshold from the beacon 3 and the beacon 3 that has emitted the first radio wave.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a progress management system and a progress management method.

Background Art

[0002] In recent years, in view of improving the work efficiency of construction work, technical development for managing the progress of construction work has been actively carried out. For example, it can be said that the progress of construction work can be managed if the position and operating status of construction machinery used in construction work, the position and work content of workers participating in construction work, etc. can be confirmed in real time. Here, regarding outdoor construction work, the position of outdoor construction machinery and the position of workers can be obtained by GPS (Global Positioning System) or GNSS (Global Navigation Satellite System). In addition, the operating status of outdoor construction machinery and the work content of workers can be obtained by a camera that photographs the outdoor work site. However, since radio waves from satellites do not reach inside a tunnel, the position of construction machinery inside the tunnel and the position of workers cannot be obtained by GNSS or the like. Also, in a closed environment such as inside a tunnel, even if many cameras are installed, there are limitations in the shooting range of the cameras, so the operating status of indoor construction machinery and the work content of workers cannot be reliably obtained.

[0003] Patent Document 1 discloses a tunnel construction process recording device and the like that can quickly record the tunnel construction process at any time without relying on manual work when recording the tunnel construction process. The invention of Patent Document 1 obtains electrical usage information such as ON / OFF of the electrical usage status and the amount of electricity from a power source such as a distribution board that supplies power to a plurality of machines, and determines the corresponding tunnel construction process by analyzing the obtained electrical usage information.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

[0005] The invention described in Patent Document 1 associates the ON / OFF state of a machine's power supply with the work it is performing to determine the operating status of construction machinery in a tunnel. However, for example, even if a machine's power supply is ON, it may not be performing any construction work, so it cannot be said that the operating status of construction machinery can be accurately managed. Therefore, there is a problem in that it cannot improve the work efficiency of tunnel construction.

[0006] From this perspective, the object of the present invention is to propose a progress management system and a progress management method that improve the work efficiency of tunnel construction. [Means for solving the problem]

[0007] The present invention, which solves the aforementioned problems, is a progress management system comprising: a transmitter attached to a target to be monitored inside a tunnel; a plurality of first receivers arranged at predetermined intervals in the direction from the tunnel face toward the tunnel entrance; and a processing device that generates location information and operational information of the target to be monitored based on the first receivers that receive a first radio wave with an intensity of a first threshold or higher from the transmitter, and the transmitter that emitted the first radio wave. Furthermore, the present invention is a progress management method comprising the steps of: each of a plurality of first receivers, which are arranged at predetermined intervals in the direction from the tunnel face toward the tunnel entrance, receiving radio waves from a transmitter attached to a target to be monitored inside the tunnel; and generating location information and operational information of the target to be monitored based on the first receiver that received the first radio waves with an intensity of 1 or more than a first threshold, and the transmitter that emitted the first radio waves.

[0008] For example, by using beacons that emit radio waves through power supply or operation of construction machinery or the movement of workers as transmitters, and placing receivers (first receivers) on the tunnel walls, wireless communication within the tunnel can be realized. The radio waves emitted from the transmitters include an ID that identifies the monitored object (construction machinery, workers, etc.) to which the transmitter is attached. The processing unit is connected to each receiver in a communicative manner and can acquire the location information of the placed receivers in advance. By setting a threshold (first threshold) for the intensity of the radio waves emitted from the transmitters in the receivers, the reception range when the receiver receives radio waves (first radio waves) of a predetermined intensity or higher from the transmitters can be determined. Therefore, when a receiver receives radio waves of a predetermined intensity or higher, it means that the monitored object is within the receiver's reception range, and location information of the monitored object can be generated. Location information can be generated in real time and updated as the monitored object moves. Also, for example, when construction machinery is operating and performing a predetermined task, the transmitter attached to the construction machinery can detect vibrations caused by the work and emit radio waves of an intensity corresponding to the vibrations. Therefore, when the receiver receives a radio wave (first radio wave) of a predetermined intensity or higher, it can analyze the intensity of that radio wave to identify the work of construction machinery, and thus generate operational information of the construction machinery. Operational information can be generated in real time and updated in accordance with the progress of the monitored work. Thus, the progress of work can be managed even inside a tunnel, improving the efficiency of construction work inside the tunnel. Furthermore, by using simple and inexpensive devices such as beacons as transmitters, the cost of introducing a system for managing the progress of work inside a tunnel can be reduced.

[0009] Furthermore, it is preferable that the processing device generates the operational information of the monitored target based on the first receiver, which received a second radio wave having an intensity between a second threshold and less than the first threshold, and the transmitter, which emitted the second radio wave.

[0010] Since the second threshold is smaller than the first threshold, the second radio wave has a weaker signal strength than the first radio wave. Also, the reception range of the receiver capable of receiving the second radio wave (first receiver) is larger than the reception range capable of receiving the first radio wave. Therefore, when a receiver receives the second radio wave after receiving the first radio wave from the same construction machine, it can be inferred that the construction machine has moved away from the receiver (towards the work face as work progresses). Since the receiver can receive the second radio wave, it can analyze the strength of the second radio wave to identify the work of the construction machine that has moved away, and thus generate and update information about the operation of the construction machine.

[0011] Furthermore, it is preferable that the first threshold value is a value that can be set for each transmitter so that the reception range of the first radio wave by the first receiver is the same.

[0012] This makes it possible to mitigate or eliminate differences in radio wave range caused by differences in the type of transmitter and the mounting position of the transmitter relative to the monitored object. Therefore, the distance between the receiver that receives the first radio wave and the monitored object to which the transmitter that emits the first radio wave is attached (the reception range of the first radio wave) can be adjusted to be the same regardless of differences in model or mounting position, thereby mitigating or eliminating variations in the accuracy of the monitored object's location information.

[0013] Furthermore, it is preferable that, of the multiple first receivers, the first receiver located closest to the tunnel face is placed on the power supply trolley, and the remaining receivers are placed on the inner wall of the tunnel.

[0014] Since the power supply trolley moves as the excavation work progresses, the receiver (first receiver) located on the power supply trolley can follow the changing position of the excavation face. Therefore, the receiver located on the power supply trolley can reliably receive the first radio wave from the monitored object working near the excavation face, regardless of the speed of the work or the arrangement of the remaining receivers. As a result, the accuracy of determining the position information of the monitored object working near the excavation face can be improved.

[0015] Furthermore, it is further provided with one or more second receivers arranged outside the tunnel, and it is preferable that the processing device generates position information of the monitoring target based on the second receiver that has received a third radio wave with a strength equal to or greater than a third threshold value from the transmitter and the transmitter that has transmitted the third radio wave.

[0016] When a receiver (second receiver) arranged outdoors receives a radio wave (third radio wave) with a predetermined strength or more, it means that a monitoring target exists within the reception range of the receiver. Therefore, approximate position information of the monitoring target that has moved from inside the tunnel to outside the tunnel can be generated. Thus, a monitoring target outdoors can be managed using a wireless communication system using a beacon or the like.

[0017] Furthermore, it is preferable to further include a display device that displays the position information and operation information.

[0018] Thereby, the work progress of the monitoring target can be easily confirmed, and work progress management can be efficiently performed.

Advantages of the Invention

[0019] According to the present invention, the work efficiency of tunnel construction can be improved.

Brief Description of the Drawings

[0020] [Figure 1] It is a functional configuration diagram of the progress management system of the present embodiment. [Figure 2] It is an explanatory diagram regarding the reception range of the receiver. [[ID=XXX]] [Figure 3] It is an explanatory diagram when the construction machine moves to the face side of the tunnel. [Figure 4] It is an explanatory diagram when setting the reception range of the receiver for each beacon, where (a) is the case of an acceleration type beacon and (b) is the case of a power supply type beacon. [Figure 5] It is an explanatory diagram of a configuration in which a receiver is arranged on a power supply trolley. [Figure 6] Note: There seems to be a formatting issue in the original text where "XXX" is used instead of a tag in line 33. I've left it as is in the translation for consistency with the original. If this is an error, please correct the original text for a more accurate translation.It is an explanatory diagram of a configuration for monitoring construction machinery located outside the tunnel. [Figure 7] It is an example screen of a progress time chart. [Figure 8] It is an example screen of entry management. [Figure 9] It is a flowchart of a progress management process.

Embodiments for Carrying Out the Invention

[0021] Hereinafter, embodiments for carrying out the present invention will be described in detail with appropriate reference to the drawings. Each drawing only schematically shows the present invention to such an extent that it can be sufficiently understood. Therefore, the present invention is not limited only to the illustrated examples. In each drawing, common components and similar components are denoted by the same reference numerals, and their redundant descriptions are omitted.

[0022] [Configuration] FIG. 1 is a functional configuration diagram of the progress management system of the present embodiment. The progress management system is a system for managing the progress of construction work in a tunnel. The progress management system includes a processing device 1, a display device 2, a plurality of types of beacons 3, a plurality of receivers 4, and a camera 5. The processing device 1 is a computer that performs processing for monitoring a construction machine 6 used in tunnel construction work and a worker 7 who performs the construction work. The construction machine 6 and the worker 7 are specific examples of the "monitoring target" of the present invention. The display device 2 is a device that displays the processing result of the processing device 1. The processing device 1, the display device 2, the beacon 3, the receiver 4, and the camera 5 are connected so as to be communicable wirelessly or by wire via a network. The network can be, for example, the Internet, but is not limited thereto. For example, communication via the network can be realized by mounting relay devices (not shown) such as routers, meshes, and bridges.

[0023] The processing unit 1 includes hardware such as an input unit, an output unit, a control unit, and a storage unit. For example, if the control unit consists of a CPU (Central Processing Unit), the information processing performed by the computer including that control unit is realized by program execution processing by the CPU. The storage unit included in the computer stores various programs to realize the computer's functions according to the CPU's instructions. This enables cooperation between software and hardware. The programs can be provided by recording them on a recording medium or via a network.

[0024] The beacon 3 is a device attached to the construction machine 6 and the worker 7 that transmits radio waves for wireless communication. In this embodiment, the beacon 3 may be an acceleration-type beacon 3a (first transmitter) attached to the construction machine 6, a power supply-type beacon 3b (second transmitter) attached to the construction machine 6, and an acceleration-type beacon 3c (first transmitter) attached to the worker 7, but is not limited to these. The acceleration-type beacon 3a detects vibrations generated when the construction machine 6 operates to perform a predetermined task, and transmits radio waves upon detection of vibrations. For example, it is preferable to attach the beacon 3a to a predetermined location on the construction machine 6. The beacon 3a is equipped with an acceleration sensor and transmits radio waves when an acceleration above a predetermined threshold is detected. The power supply-type beacon 3b detects power supply when the power of the construction machine 6 is turned on, and transmits radio waves upon detection of power supply. The power supply-type beacon 3b also detects no power supply when the power of the construction machine 6 is turned off, and stops transmitting radio waves upon detection of no power supply. For example, it is preferable to plug beacon 3b into a power supply port on the construction machine 6 to directly detect the power supply. Alternatively, beacon 3b may be plugged into a power supply control box that supplies power to the construction machine 6 to indirectly detect the power supply. The acceleration-type beacon 3c detects vibrations generated by the movement of the worker 7 and transmits radio waves upon detection of vibrations. For example, it is preferable to attach beacon 3c to the helmet worn by the worker 7. When beacons 3a, 3b, and 3c are not distinguished, they will be described as beacon 3.

[0025] Receiver 4 (first receiver) is a device that receives radio waves from beacon 3. Each of the multiple receivers 4 is arranged at predetermined intervals in the direction from the tunnel face to the tunnel entrance, and can be attached, for example, to the inner wall of the tunnel. Receiver 4 can convert the radio waves received from beacon 3 into data of a predetermined protocol and transmit the converted data to processing unit 1 via the network. The greater the distance between beacon 3 and receiver 4, the weaker the intensity of the radio waves received by receiver 4 from beacon 3. Therefore, the distance between the monitored object to which beacon 3 is attached and receiver 4 can be estimated based on the intensity of the radio waves. The data received by processing unit 1 includes, but is not limited to, information about the radio waves received by receiver 4 and an ID that identifies receiver 4 that received the radio waves. The information about the radio waves includes, for example, an ID that identifies beacon 3 that transmitted the radio waves and the intensity (amplitude) of the radio waves received by receiver 4, but is not limited to these. Camera 5 is a camera device that photographs construction machinery 6 and workers 7 working inside the tunnel. Camera 5 is preferably positioned inside the tunnel and positioned and oriented in a way that allows it to photograph the tunnel face. Construction machinery 6 includes, for example, face drilling machines (drill jumbos), concrete spraying machines, wheel loaders, and dump trucks used in mountain tunnel construction. By monitoring these construction machines 6 or the workers 7 performing tunnel construction work, the progress of tunnel construction work (including mountain tunnel construction) can be managed in detail, further improving the efficiency of tunnel construction work.

[0026] (Software configuration of processing unit 1) The processing unit 1 comprises an analysis unit 11 and a display control unit 12. The processing unit 1 also stores a transmitter DB 13, a receiver DB 14, a location information DB 15, and an operation information DB 16. "DB" is an abbreviation for Database. The analysis unit 11 can analyze the radio waves received from the beacon 3 by processing the data received from the receiver 4. If the beacon 3 is an acceleration-type beacon 3a, the radio waves transmitted by the beacon 3a are radio waves caused by vibrations of the monitored object. For example, the radio waves transmitted by the beacon 3a may have a waveform that follows the waveform of the acceleration of the monitored object. Alternatively, they may be radio waves with a predetermined waveform (e.g., a sine wave) whose frequency changes in response to vibration (acceleration). Alternatively, they may be radio waves that exhibit a constant waveform (frequency and amplitude are constants) when the acceleration (vibration) exceeds a predetermined value. Furthermore, the analysis of radio waves by the analysis unit 11 may, for example, determine that the monitored object is operating because radio waves are being transmitted from the beacon 3. Alternatively, a Fourier transform may be performed to analyze the frequency characteristics contained in the radio waves. Furthermore, the receiver 4 may determine the intensity (amplitude) of the radio waves received, and based on the determined intensity, identify the location of the monitored object or determine its operating status. Finally, by identifying the ID of the beacon 3 that emitted the radio waves, the ID of the monitored object to which the beacon 3 is attached may be identified. The display control unit 12 controls the display content of the display device 2 based on the analysis results of the analysis unit 11. The transmitter DB13 stores transmitter information for each beacon 3, which is information related to the beacon 3. The transmitter information includes, but is not limited to, an ID that identifies the target beacon 3, the type of beacon 3 (accelerometer type, power supply type, etc.), and an ID that identifies the monitored object to which the beacon 3 is attached. The radio waves transmitted from the beacon 3 include the ID that identifies the beacon 3. The analysis unit 11 can refer to the transmitter DB13 to identify the ID that identifies the monitored object to which the beacon 3 is attached from the radio waves received by the receiver 4. Alternatively, the radio waves transmitted from the beacon 3 may include the ID that identifies the monitored object to which the beacon 3 is attached. If the monitored object is a construction machine 6, the processing unit 1 can refer to a predetermined database (not shown) using the ID that identifies the construction machine 6 to identify the type of construction machine 6 (e.g., dump truck, hydraulic excavator, jumbo) and the type of work that the construction machine 6 can perform (e.g., rock bolt installation work for a jumbo). If the target of monitoring is worker 7, the processing unit 1 can identify worker 7's name, affiliation, etc., by referring to a predetermined database (not shown) using an ID that identifies worker 7. The receiver DB14 stores receiver information for each receiver 4, which is information about the receiver 4. The receiver information includes, but is not limited to, an ID that identifies the target receiver 4, the location of the receiver 4, and a threshold value related to the intensity of the radio waves received by the receiver 4. The location of the receiver 4 can be identified, for example, as well-known map information. The threshold value related to the intensity of the radio waves is a value that can be used for analysis by the analysis unit 11 and can be set by the operator of the processing unit 1. For example, radio waves with an intensity below the threshold can be cut off as noise. Also, if the receiver 4 receives radio waves with an intensity above the threshold, the analysis unit 11 can identify the receiver 4 and the beacon 3 that transmitted the radio waves and perform radio wave analysis. Multiple threshold values ​​can be set.

[0027] The location information DB15 stores location information for each monitored object. The location information of the monitored object is information generated by the analysis unit 11 as an analysis result. The location information of the monitored object includes, but is not limited to, the location of the monitored object, an ID that identifies the receiver 4 that received radio waves from the beacon 3 attached to the monitored object, an ID that identifies the monitored object, the ID of the beacon 3 attached to the monitored object, and the time of radio wave reception. The operational information DB16 stores operational information for each monitored object. The operational information for a monitored object is information generated by the analysis unit 11 as an analysis result. The operational information for a monitored object includes, but is not limited to, the operational status of the monitored object, an ID identifying the receiver 4 that received radio waves from the beacon 3 attached to the monitored object, an ID identifying the monitored object, the ID of the beacon 3 attached to the monitored object, and the time of radio wave reception. The operational status of the monitored object is information indicating whether the construction machine 6 is in operation (working) or not, and information indicating whether the worker 7 is moving or not. Furthermore, if the beacon 3 is an acceleration-type beacon 3a, the operational information for the construction machine 6 may include the work performed by the construction machine 6, the work duration, the start time of the work, and the end time of the work. Furthermore, if the beacon 3 is a power supply-type beacon 3b, the operational information for the construction machine 6 may include the power supply duration, power supply start time, and power supply end time of the construction machine 6. Furthermore, the information in the transmitter DB13, receiver DB14, location information DB15, and operational information DB16 are all linked.

[0028] (Receiver 4's reception range) Regarding wireless communication using beacon 3, there is a characteristic that the greater the distance between beacon 3 and receiver 4, the weaker the radio wave intensity received by receiver 4 from beacon 3. This characteristic can be used to set the reception range of receiver 4 according to the application. Figure 2 is an explanatory diagram regarding the reception range of the receiver. For example, if the radio waves emitted from beacon 3a attached to construction machinery 6 are omnidirectional and conditions such as the surrounding environment and mounting position are not considered, the radio waves will radiate with the same intensity in all three dimensions. As shown in Figure 2, the intensity of the radio waves that reach the surface of a virtual sphere s1 with radius r1 centered on beacon 3a is 85 dB, and the radio waves inside virtual sphere s1 are strong (0-85 dB). Also, the intensity of the radio waves that reach the surface of a virtual sphere s2 with radius r2 (>r1; e.g., 100-200 m) centered on beacon 3a is 100 dB, and the radio waves inside virtual sphere s2 excluding virtual sphere s1 are weak (85-100 dB).

[0029] <Improved position accuracy> Receivers 4a and 4b are considered as receivers 4. Receiver 4a is positioned closest to the tunnel face among all receivers 4, while receiver 4b is positioned adjacent to receiver 4a on the tunnel entrance side, at a predetermined distance (e.g., 100m). When the construction machine 6 and receivers 4a and 4b are in the positional relationship shown in Figure 2, both receivers 4a and 4b are contained within the virtual sphere s2. Therefore, both receivers 4a and 4b can receive the weak radio waves from beacon 3a. Consequently, even if the analysis unit 11 analyzes the received radio waves, it cannot determine whether the construction machine 6 is near receiver 4a or receiver 4b, and thus cannot improve the positional accuracy of the construction machine 6. Therefore, a first threshold is set for receivers 4a and 4b. The first threshold is a threshold used to determine whether the radio waves received by receivers 4a and 4b are strong radio waves (first radio waves). The first threshold can be set remotely for each receiver 4a and 4b by control from the processing unit 1. In the situation shown in Figure 2, receiver 4a, located inside the virtual sphere s1 where strong radio waves are distributed, can receive radio waves from beacon 3a, while receiver 4b, located outside the virtual sphere s1, cannot. Therefore, by analyzing the received radio waves, the analysis unit 11 can determine whether the construction machine 6 is near receiver 4a (but not near receiver 4b), thereby improving the position accuracy of the construction machine 6. Furthermore, based on the determination result and the known position of receiver 4, the analysis unit 11 can generate position information of the construction machine 6 (within a distance r1 from the position of receiver 4) and register it in the position information DB 15. In this way, by setting a first threshold for the receivable radio wave strength for receivers 4a and 4b, the radio wave reception range (radius r1 of the virtual sphere s1) for identifying the position of the construction machine 6 can be determined for each of receivers 4a and 4b. Note that position information can be generated in real time, and the position information in the position information DB 15 can be updated as the construction machine 6 moves.

[0030] Furthermore, since receivers 4a and 4b receive radio waves from beacon 3a caused by vibrations from the construction machinery 6, the analysis unit 11 can analyze the received radio waves and determine that the construction machinery 6 is in operation (working). Based on the determination result, the analysis unit 11 can generate operation information for the construction machinery 6 and register it in the operation information database 16. The operation information can be generated in real time, and the operation information can be updated in accordance with the progress of the work of the construction machinery 6. Since the positions of receivers 4a and 4b are known, the progress of work (location and content of work) can be managed even in tunnels where positioning satellite radio waves cannot reach, thereby improving the work efficiency of construction work inside tunnels. In addition, by using simple and inexpensive devices such as beacons as transmitters, the cost of introducing a system for managing the progress of work inside tunnels can be reduced.

[0031] Here, the position of receiver 4a can be determined relative to the position of the tunnel face in the current cycle of face work, taking into account the effects of blasting work, etc. Similarly, the position of receiver 4b can be determined relative to the position of the tunnel face one cycle prior to the face work. In this case, receiver 4b is the receiver that was positioned closest to the tunnel face one cycle prior. If receiver 4a receives radio waves from beacon 3a but receiver 4b does not, the analysis unit 11 can determine that the construction machine 6 to which beacon 3a is attached is working within the reception range of receiver 4a. In other words, the analysis unit 11 can determine that the construction machine 6 is performing face work in the current cycle. Also, if receiver 4b receives radio waves from beacon 3a but receiver 4a does not, the analysis unit 11 can determine that the construction machine 6 to which beacon 3a is attached is performing work other than face work. The specific details of work other than face work can be estimated from the type of construction machine 6, etc., by referring to a predetermined database related to construction machine 6.

[0032] <If you are not within the reception range for location determination> Figure 2 describes the case where the construction machine 6 is not within the reception range of the radio waves used to determine the position of the construction machine 6 for receiver 4a. Figure 3 is an explanatory diagram when the construction machine moves to the tunnel face. Assume that the construction machine 6 has moved further towards the tunnel face compared to the case in Figure 2 due to face work. When the construction machine 6 and receivers 4a and 4b are in the positional relationship shown in Figure 3, receiver 4a is included inside virtual sphere s2 but not inside virtual sphere s1. Therefore, receiver 4a cannot receive strong radio waves from beacon 3a, but can receive weak radio waves. Thus, a second threshold is set for receivers 4a and 4b. The second threshold is the threshold at which receivers 4a and 4b can determine that the radio waves they have received are weak. The second threshold can be set remotely for each receiver 4a and 4b by control from the processing unit 1. When expressing radio wave intensity in dB units, the second threshold value is larger than the first threshold value. However, in this embodiment, regardless of whether it is expressed in dB units or not, the second threshold is the threshold value for receiver 4 to receive low-intensity (weak) radio waves (second radio waves), and the first threshold value is the threshold value for receiver 4 to receive high-intensity (strong) radio waves. In other words, the second threshold value is smaller than the first threshold value. In the case of Figure 3, receiver 4b is farther away from the construction machine 6 than the radius r2 of the virtual sphere s2, and cannot receive even weak radio waves from beacon 3a. Even if receiver 4b could receive radio waves from beacon 3a, the analysis unit 11 would process them as noise.

[0033] Receiver 4a receives radio waves (weak radio waves) from beacon 3a due to vibrations from construction machinery 6, so analysis unit 11 can analyze the received radio waves and determine that construction machinery 6 is in operation (working). Based on the determination result, analysis unit 11 can generate operation information for construction machinery 6 and register and update it in the operation information DB 16DB. However, since receiver 4a did not receive strong radio waves from beacon 3a, analysis unit 11 cannot determine the current position of construction machinery 6. In this case, analysis unit 11 uses the position of construction machinery 6 as indicated by the last generated position information for construction machinery 6 (a position within the reception range determined from the first threshold of receiver 4a) and does not update the position information for construction machinery 6. Here, tunnel work generally proceeds from the tunnel entrance toward the tunnel face. Therefore, even if the processing unit 1 does not recognize that construction machinery 6 is located in the positional relationship shown in Figure 3, if receiver 4b has not received radio waves (weak radio waves) from beacon 3a, it can be inferred that construction machinery 6 has moved toward the tunnel face than the position indicated by the last generated position information for construction machinery 6. Based on these inferences, the analysis unit 11's determination that construction machine 6 is in operation (working) is reasonable.

[0034] Considering the example in Figure 3, it is preferable to provide a first threshold and a second threshold for the receiver 4, and for the processing unit 1 to generate operational information for the construction machine 6 based on the receiver 4 that receives a weak radio wave with an intensity between the second threshold (which is smaller than the first threshold) and the first threshold, and the beacon 3a that emitted the weak radio wave. Since the reception range of the receiver 4, which can receive weak radio waves, is larger than the reception range of the receiver 4, when the receiver 4 receives a strong radio wave from the construction machine 6 and then starts receiving a weak radio wave from the same construction machine 6, it can be inferred that the construction machine 6 has moved away from the receiver 4 (in the direction of moving towards the work face as work progresses). Since the receiver 4 can receive weak radio waves, it can analyze the weak radio waves to identify the work of the construction machine 6 that has moved away, and thus generate and update operational information for the construction machine 6.

[0035] <Set the first threshold for each beacon> Even with the same monitored target, the radio wave range of the beacon 3 differs depending on the type of beacon 3 attached to the monitored target (accelerometer type, power supply type, etc.) and the mounting position of the beacon 3. Therefore, when the same first threshold is set for the same monitored target in the receiver 4, the distribution area of ​​strong radio waves among the radio waves emitted from the beacon 3 may differ for each beacon 3. As a result, even with the same monitored target, the accuracy of the position information generated by the analysis unit 11 may vary for each beacon 3. Figure 4 is an explanatory diagram for setting the receiver's reception range for each beacon, where (a) is the case for an acceleration-type beacon and (b) is the case for a power supply-type beacon. The construction machinery 6 shown in Figure 4(a) and Figure 4(b) are assumed to be the same. Also, the mounting position of the acceleration-type beacon 3a shown in Figure 4(a) and the mounting position of the power supply-type beacon 3b shown in Figure 4(b) are assumed to be the same. When the first threshold for receivers 4a and 4b is set to 85 dB, as shown in Figure 4(a), a virtual sphere s1 with radius r1 where strong radio waves (0-85 dB) are distributed is determined for the radio waves transmitted from beacon 3a, and as shown in Figure 4(b), a virtual sphere s3 with radius r3 where strong radio waves (0-85 dB) are distributed is determined for the radio waves transmitted from beacon 3b.

[0036] Here, as already described, since the radio wave propagation distances of the beacons 3a and 3b are different, r1 ≠ r3. For the sake of convenience of explanation, let r1 > r3. As shown in FIGS. 4(a) and 4(b), both of the virtual spheres s1 and s3 have reached the receiver 4a, and the construction machine 6 is within the reception range of the receiver 4a. Therefore, in either case of FIGS. 4(a) and (b), the analysis unit 11 can generate the position information of the construction machine 6. However, the distance between the construction machine 6 and the receiver 4a shown in FIG. 4(a) is greater than the distance between the construction machine 6 and the receiver 4a shown in FIG. 4(b), and there is a difference in the distance between the two. Therefore, there is a difference in the meaning of the position information between FIGS. 4(a) and 4(b), and variations occur in the accuracy of the position information of the construction machine 6. Thus, the processing device 1 is set to change the first threshold values of the receivers 4a and 4b for the beacon 3a, for example, to 75 dB. With this setting, for the radio waves transmitted from the beacon 3a, a virtual sphere s4 with a radius r4 (< r1) in which strong radio waves (0 to 75 dB) are distributed is determined. At this time, r4 = r3. As shown in FIG. 4(a), even if the virtual sphere s1 is changed to the virtual sphere s4, as long as the virtual sphere s4 reaches the receiver 4a, the construction machine 6 is within the reception range of the receiver 4a. Therefore, between FIGS. 4(a) and 4(b), the distance between the construction machine 6 and the receiver 4a becomes the same, the difference in the meaning of the position information is alleviated or eliminated, and the variation in the accuracy of the position information of the construction machine 6 can be alleviated or eliminated. Thus, it is preferable to appropriately change the first threshold value of the receiver 4 according to the type of the beacon 3.

[0037] <> In addition, in Figures 4(a) and 4(b), the second thresholds of receivers 4a and 4b may be set to be changed in the same way as the first threshold. If the second threshold of receivers 4a and 4b is set to 100 dB, as shown in Figure 4(a), a virtual sphere s2 with radius r2 where weak radio waves (85 (or 75) to 100 dB) are distributed is determined for the radio waves transmitted from beacon 3a, and as shown in Figure 4(b), a virtual sphere s5 with radius r5 where strong radio waves (85 to 100 dB) are distributed is determined for the radio waves transmitted from beacon 3b. The processing unit 1 can change the radius r2 or radius r5 by setting the second threshold of receivers 4a and 4b to be changed for beacon 3a or beacon 3b.

[0038] Similarly, even if the monitored object and the type of beacon 3 are the same, but the mounting positions of the beacons 3 differ, resulting in different radio wave ranges, the receiver 4 may be configured to change the first threshold for one of the beacons 3 mounted in a different position. Furthermore, even if the type of beacon 3 and the mounting positions of the beacons 3 are the same, but the monitored objects (especially the same type of construction machinery 6) differ, resulting in different radio wave ranges, the receiver 4 may be configured to change the first threshold for one of the beacons 3 mounted on different monitored objects. The setting to change the first threshold can also be applied when there are multiple factors causing differences in the radio wave range of the beacons 3. In this way, the first threshold should be set to a value that can be configured for each beacon 3 so that the reception range of strong radio waves by the receiver 4 is the same. This allows for the mitigation or elimination of differences in radio wave range caused by differences in the monitored object, the type of beacon 3 mounted on the monitored object, the mounting position of the beacon 3, etc. Therefore, the distance (reception range of strong radio waves) between the receiver 4 that receives strong radio waves and the monitoring target to which the beacon 3 that emits strong radio waves is attached can be adjusted to be the same regardless of differences in model or mounting location, thereby mitigating or eliminating variations in the accuracy of the monitoring target's location information.

[0039] (When using a power supply trolley) In the progress management system of this embodiment, it is possible to have a configuration in which a receiver is placed on a power supply trolley that travels inside the tunnel. Figure 5 is an explanatory diagram of a configuration in which a receiver is placed on a power supply trolley. The power supply trolley 8 is a vehicle that supplies power to construction machinery 6 inside the tunnel. As shown in Figure 5, a receiver 4c is placed on the power supply trolley 8 and the power supply trolley 8 is kept near the tunnel face. The power supply trolley 8 can approach the construction machinery 6 that is performing excavation work etc. near the tunnel face and supply power. Therefore, the receiver 4c can be placed closer to the tunnel face than any of the receivers 4 placed on the inner wall of the tunnel. In other words, of all the receivers 4 placed in the tunnel, the receiver 4c closest to the tunnel face is placed on the power supply trolley 8, and the rest (receivers 4a, 4b, ...) are placed on the inner wall of the tunnel. With this configuration, the receiver 4c placed on the power supply trolley 8 is placed close to the construction machinery 6 that is performing excavation work etc. near the tunnel face, and the construction machinery 6 is reliably within the reception range of the receiver 4c according to the first threshold, regardless of the progress of the work. Therefore, the receiver 4c receives strong radio waves from the beacon 3 attached to the construction machine 6, and the analysis unit 11 generates positional information for the construction machine 6, thereby reliably determining the position of the construction machine 6.

[0040] Furthermore, as the excavation work at the tunnel face progresses, the construction machine 6 moves closer to the tunnel face, and the power supply trolley can also move closer to the tunnel face in accordance with the progress of the excavation work in order to supply power. Therefore, the receiver 4 located on the power supply trolley 8 can follow the changing position of the tunnel face. Thus, the receiver 4c located on the power supply trolley 8 can reliably receive strong radio waves from the construction machine 6 working near the tunnel face, regardless of the speed of the work or the arrangement of the remaining receivers 4a, 4b, etc. As a result, the accuracy of determining the position information of the construction machine 6 working near the tunnel face can be improved. Note that if, as the excavation work progresses, the receiver 4c located on the power supply trolley 8 moves more than a predetermined distance (e.g., 100m) from the receiver 4a located closest to the tunnel face among the receivers 4 located on the inner wall of the tunnel, it is preferable to place a new receiver 4 on the inner wall of the tunnel closer to the tunnel face than receiver 4a.

[0041] (Monitoring targets outside the tunnel) In the progress management system of this embodiment, it is possible to configure the system to place receivers outside the tunnel construction site. Figure 6 is an explanatory diagram of a configuration for monitoring construction machinery located outside the tunnel. Figure 6 shows a map indicating the location of the tunnel construction site and the location of an office located away from the construction site. As shown in Figure 6, numerous receivers 4 are densely arranged inside the tunnel construction site in the direction from the tunnel face toward the tunnel entrance. Therefore, at least one of the receivers 4 placed inside the tunnel can reliably receive strong radio waves from the beacon 3 attached to the construction machinery 6 staying inside the tunnel. However, since the receivers 4 placed inside the tunnel cannot receive radio waves from the beacon 3 attached to the construction machinery 6 staying outside the tunnel, the construction machinery 6 cannot be monitored.

[0042] In light of these circumstances, the receiver 4 can be placed outside the tunnel, that is, in a predetermined location outdoors. The construction machinery 6 that is outdoors is usually unused and is parked in a parking lot near the office. Therefore, for example, as shown in Figure 6, it is preferable to place the receiver 4d (second receiver) in the office. There may be one or more receivers 4d, but in this embodiment there is one. A third threshold is set for the receiver 4d. The third threshold is the threshold at which the receiver 4d can determine that the radio waves received (second radio waves) are radio waves transmitted from the beacon 3 attached to the construction machinery 6 near the office. The third threshold can be set remotely by control from the processing unit 1.

[0043] The processing unit 1 can generate location information for the construction machine 6 based on the receiver 4d, which received radio waves from the beacon 3 with an intensity of 3 or higher, and the beacon 3 that transmitted those radio waves. In other words, if the receiver 4d, which is located outdoors, receives radio waves of a predetermined intensity or higher, the construction machine 6 is located within the reception range of the receiver 4d. Therefore, the analysis unit 11 can generate approximate location information for the construction machine 6 that is parked in a parking lot near the office, or approximate location information for the construction machine 6 that has moved from inside the tunnel to outside (near the office). Thus, the construction machine 6 located outdoors can be managed using a wireless communication system that uses the beacon 3. The third threshold may be greater or less than the first and second thresholds. For example, if the third threshold is about the same as the second threshold, the receiver 4d may not be able to receive strong radio waves from the beacon 3, but it may be able to receive at least weak radio waves. Therefore, the analysis unit 11 can determine that the construction machine 6 with the beacon 3 attached is located at an approximate location within the area enclosed by a dashed-dot circle 61 with a reasonably large radius centered on the receiver 4d. Furthermore, if it is sufficient for the system to monitor whether the construction machine 6 is outdoors, and it is not necessary to obtain precise location information, the third threshold may be smaller than the second threshold. In this case, the analysis unit 11 can determine that the construction machine 6 with the beacon 3 attached is located at an approximate position within the area enclosed by a circle with a radius larger than the dashed circle 61, centered on the receiver 4d.

[0044] (Visualization of work progress) The display control unit 12 of the processing unit 1 can display the progress of work inside the tunnel on the display device 2 based on the location information and operation information of the monitored object generated by the analysis unit 11. This makes it easy to check the progress of the monitored object's work and enables efficient work progress management. Figure 7 is an example of a progress time chart screen. Tunnel face work performed inside a tunnel progresses by repeatedly performing cycles consisting of multiple types of work processes in a predetermined order. The work processes include, for example, drilling, excavation, and shoring / shotcrete, and one cycle is completed when these are executed in this order. Note that the classification of work processes is not limited to the above and can be designed as appropriate. For example, if the time required to complete one cycle is 7.7 hours and the daily working time is 21.5 hours, then approximately 2.79 cycles can be completed in one day. Also, if the tunnel face advances by 1m in one cycle, the tunnel face advances by approximately 2.79m in one day. The progress time chart in Figure 7 visualizes the operating status of construction machinery participating in tunnel face work on a daily basis.

[0045] The progress time chart in Figure 7 consists of the "Display Name" column, the "Total Operating Hours" column, the "Order" column, and the time chart column. The "Display Name" column lists the names of the construction machines used on a specific work day (for example, yesterday (August 31, 2022)). Here, the list in the "Display Name" column is not for each construction machine that participated in the work, but for each beacon attached to the construction machine. For example, for a spraying machine as a construction machine, the "Display Name" column lists "Spraying Machine," "Spraying Machine Con Piping (Additional)," "Spraying Machine Con Pump (Additional)," and "Spraying Machine Dryer (Additional)." "Spraying Machine" refers to the power supply type beacon attached to the spraying machine. "Spraying Machine Con Piping (Additional)" refers to the acceleration type beacon attached to the concrete piping that is a component of the spraying machine. "Spraying Machine Con Pump (Additional)" refers to the acceleration type beacon attached to the concrete pump that is a component of the spraying machine. "Spraying machine dryer (added)" refers to an acceleration-type beacon attached to a dryer, which is a component of a spraying machine. "(added)" indicates an acceleration-type beacon, while "(added)" indicates a power-supply type beacon. The "Total Operating Hours" column shows the total operating hours of the corresponding construction machinery on a specific work day. More specifically, it shows the total operating time during which the beacon attached to the corresponding construction machinery or its parts activated and transmitted radio waves due to power supply or vibration detection. The "Order" column shows the order number of the construction machinery that performed work in the cycle that progressed on a specific work day. The time chart column illustrates the operating time periods of the corresponding construction machinery on a specific work day. More specifically, it illustrates the operating time periods during which the beacon attached to the corresponding construction machinery or its parts activated and transmitted radio waves due to power supply or vibration detection. The operating time periods are obtained from the operation information generated by the analysis unit 11. The operating time periods can be illustrated by color-coding them according to the work process (in Figure 7, for ease of illustration, by hatching type). The top row of the time chart column shows the execution time periods of the work processes performed in the cycle that progressed on a specific work day, along with the names of the work processes. In the lower left of the progress time chart in Figure 7, the currently ongoing work process (shoring and spraying), the start time of that work process (September 1, 2022, 00:00:00), and the elapsed time of that work process (16 minutes and 55 seconds) can be shown.

[0046] When generating operational information for construction machinery, the analysis unit 11 can identify the working time of the construction machinery's tasks based on the radio wave transmission period from the beacon (beacon operating time), that is, the radio wave reception period by the receiver 4. Furthermore, as shown in Figure 7, the display device 2 can visualize the work status at the site by displaying operational information for each construction machine. The displayed operational information includes not only the ON / OFF status of the power to the construction machinery, but also the specific work content of the construction machinery that corresponds to the vibrations generated by the construction machinery. Therefore, the display device 2 can display the details of the work performed by the construction machinery. It can also display the start time, end time, and working time for each task. Consequently, the progress of construction work can be managed, and the work efficiency of construction work can be improved. In addition, by using simple and inexpensive devices such as beacons as transmitters, the cost of introducing a system for managing the progress of construction work can be reduced. Furthermore, by comparing it with the display of the construction plan, it is possible to clearly show the differences from the construction plan, and to make visible any delayed work, as well as tasks that workers are not good at or are good at.

[0047] The dashed ellipse in Figure 7 shows the operating time periods of the spraying machine that performs shoring and spraying. In particular, band 71 within the dashed ellipse represents the operating time period of the power supply type beacon attached to the spraying machine, for example, the time period when 400V power was supplied to the spraying machine. Bands 72 and 73 within the dashed ellipse represent the operating time periods of the acceleration type beacon attached to the concrete pump, which is a component of the spraying machine. The left end of band 71 is the start time of operation of the power supply type beacon, which indicates the start time of power supply to the spraying machine. The left end of band 72 is the start time of operation of the acceleration type beacon, which indicates the start time of spraying work by the concrete pump. By comparing bands 71 ​​and 72, it can be seen that when the spraying machine starts spraying work, the concrete pump is started after the power to the spraying machine is turned on. Conventionally, the start time of spraying work inside a tunnel, which is difficult to monitor remotely, was taken as the start time of power supply to the spraying machine (corresponding to the left end of band 71). However, the actual start time of the spraying work is the start time of the spraying work using the concrete pump, which in this embodiment can be clearly indicated as the left end of band 72. In other words, the progress management system of this embodiment can visualize the actual start time of the spraying work.

[0048] Furthermore, the rightmost point of band 71 represents the end time of operation of the power supply type beacon, indicating the end time of power supply to the spraying machine. The rightmost point of band 73 represents the end time of operation of the acceleration type beacon, indicating the end time of spraying work by concrete pump. By comparing bands 71 ​​and 73, it can be seen that when the spraying machine finishes spraying work, the power to the spraying machine is turned off after the concrete pump is stopped. Conventionally, the end time of spraying work inside a tunnel, which is difficult to monitor remotely, was considered to be the end time of power supply to the spraying machine (corresponding to the rightmost point of band 71). However, the actual end time of the spraying work is the end time of spraying work by concrete pump, which in this embodiment can be clearly indicated as the rightmost point of band 73. In other words, the progress management system of this embodiment can visualize the actual end time of the spraying work.

[0049] Furthermore, the time from the right end of band 72 to the left end of band 73 represents the time when concrete spraying work is not being performed by the concrete pump. By comparing bands 71, 72, and 73, it can be seen that power to the spraying machine is continuing even when spraying work is not being performed. Conventionally, in the case of spraying work inside tunnels, which is difficult to monitor remotely, it was determined that spraying work was being performed if power was continuing. On the other hand, in this embodiment, the end time of the spraying work midway can be clearly indicated as the right end of band 72, and the restart time of the spraying work can be clearly indicated as the left end of band 73. In other words, the progress management system of this embodiment can visualize the time when spraying work is not actually being performed.

[0050] According to the above explanation, based on radio waves from acceleration-type beacons, the working time, start time, and end time of work performed by construction machinery can be determined. In addition, based on radio waves from power-supplying beacons, the power supply time, power supply start time, and power supply end time can be determined when the power supply of the monitored device is turned ON for the construction machinery to perform work. By comparing the working time, start time, and end time with the power supply time, power supply start time, and power supply end time, it is possible to reveal the preparation period from when the power is turned ON until work begins (for example, the difference between the left end of band 71 and the left end of band 72), the cleanup period from when work is finished until the power is turned OFF (for example, the difference between the right end of band 71 and the right end of band 73), and the interruption period when work is interrupted for some reason while the power remains ON (for example, the difference between the right end of band 72 and the left end of band 73). Therefore, by visualizing the time that construction machinery was actually working as actual working time, and visualizing the preparation period, cleanup period, and interruption time as non-actual working time, it is possible to improve work progress management.

[0051] (Playback display of work content) The camera 5 shown in Figure 1 captures images of the monitored object and transmits the captured image data to the processing unit 1. The display device 2, following the control of the display control unit 12 of the processing unit 1, can play back and display the work performed on the monitored object based on the images captured by the camera 5. This makes it possible to visualize the actual work in video, displaying operational information including details of the work and work time. Therefore, work progress management can be improved by utilizing video. The display device 2 can also display images of the work being played back together with the progress time chart in Figure 7. Furthermore, if the operator of the display device 2 specifies a specific date and time, the display device 2 will indicate the specified date and time (for example, with a vertical line) on the progress time chart in Figure 7 and display the work performed at the specified date and time on the screen. The display device 2 can also play back the work starting from the specified date and time.

[0052] (Management of mine entry) When the target of monitoring is worker 7, the receiver 4, located at the tunnel entrance, can receive radio waves from the beacon 3c attached to worker 7's helmet. Specifically, the acceleration-type beacon 3 emits radio waves when it detects vibrations caused by worker 7's movement. The receiver 4 is positioned to receive strong radio waves from the beacon 3. Therefore, the analysis unit 11 can generate location information for worker 7 and determine whether worker 7 has entered the tunnel. In addition, the display device 2 can display the entry status of each worker 7 according to the control of the display control unit 12.

[0053] Figure 8 shows an example of a tunnel entry management screen. The screen in Figure 8 displays contractor labels 81 and worker labels 82. Contractor labels 81 indicate the names of the contractors involved in the tunnel construction work. Worker labels 82 indicate the names of the workers 7. Each worker 7's worker label 82 is positioned to the right of the contractor label 81 of the contractor to which the worker 7 belongs. For workers 7 that the analysis unit 11 determines have entered the tunnel, the display device 2 displays the corresponding worker label 82 in color (shaded in Figure 8). On the other hand, for workers 7 that the analysis unit 11 determines have not entered the tunnel, the display device 2 displays the corresponding worker label 82 without color. Therefore, it is possible to visualize whether or not the workers 7 performing the tunnel construction have entered the tunnel, and the progress management of the tunnel construction can be improved.

[0054] [process] The progress management process using the progress management system of this embodiment will now be described. Figure 9 is a flowchart of the progress management process. The flowchart in Figure 9 starts when the analysis unit 11 of the processing unit 1 receives data from the receiver 4. First, the analysis unit 11 identifies the receiver 4 that transmitted the received data (step A1). The receiver 4 can be identified by obtaining the ID of the receiver 4 contained in the received data and referring to the receiver DB 14. Next, the analysis unit 11 analyzes the radio waves received by the identified receiver 4 from the beacon 3 (step A2). The received data contains information about the radio waves. Next, the analysis unit 11 identifies the beacon 3 that transmitted the radio waves to the identified receiver 4 (step A3). The beacon 3 can be identified by obtaining the ID of the beacon 3 contained in the radio waves and referring to the transmitter DB 13. Once the analysis unit 11 identifies the beacon 3, it can refer to the transmitter DB 13, etc., to identify the monitored object to which the beacon 3 was attached.

[0055] Next, the analysis unit 11 determines whether the identified receiver 4 is a receiver located inside a tunnel (step A4). If it is a receiver located inside a tunnel (Yes in step A4), the analysis unit 11 determines whether the intensity of the radio waves received from the identified beacon 3 is equal to or greater than the first threshold (step A5). If it is equal to or greater than the first threshold (Yes in step A5), the analysis unit 11 refers to the location information DB 15 and the operation information DB 16 to generate or update the location information and operation information of the identified monitored object (step A6). Next, the display control unit 12 executes the display processing of the progress time chart (step A7). Specifically, the display control unit 12 displays the progress time chart (see Figure 7) on the display device 2 based on the generated or updated location information and operation information. After that, the progress management process is completed.

[0056] On the other hand, if the strength of the radio waves received from the identified beacon 3 is not equal to or greater than the first threshold (No in step A5), the analysis unit 11 determines whether or not the strength of the radio waves received from the identified beacon 3 is equal to or greater than the second threshold (step A8). If it is equal to or greater than the second threshold (Yes in step A8), the analysis unit 11 refers to the operation information 16DB and generates or updates the operation information of the identified monitored target (step A9). After that, the display control unit 12 executes the display processing of the progress time chart (step A7), and the progress management process ends. On the other hand, if it is not equal to or greater than the second threshold (No in step A8), the analysis unit 11 determines that the radio waves received by the identified receiver 4 were noise, and the progress management process ends.

[0057] Furthermore, if the identified receiver 4 is not a receiver inside the tunnel (Yes in step A4), the analysis unit 11 determines whether the strength of the radio waves received from the identified beacon 3 is above the third threshold (step A10). If it is above the third threshold (Yes in step A10), the analysis unit 11 refers to the location information DB 15 and the operation information DB 16 to generate or update the location information and operation information of the identified monitoring target (step A6). After that, the display control unit 12 executes the display processing of the progress time chart (step A7), and the progress management process ends. Note that in the case of Yes in step A10 → step A6 → step A7, if the identified monitoring target is, for example, a construction machine 6 staying in the parking lot of an office far from the tunnel construction site, then if it is sufficient to confirm the presence of the construction machine 6, then it is not necessary to generate or update accurate location information and operation information, and this process may be omitted. On the other hand, if the value is not above the third threshold (No in step A10), the analysis unit 11 determines that the radio waves received by the identified receiver 4 were noise, and the progress management process ends.

[0058] [others] (a): Unless there are special circumstances, the matters described in this embodiment concerning the construction machinery 6 as the object of monitoring also apply to the worker 7 as the object of monitoring. Also, the matters described in relation to the worker 7 as the object of monitoring also apply to the construction machinery 6 as the object of monitoring. (b) Acceleration-type beacons 3a may be attached to multiple locations on the construction machine 6, and the receiver 4 may receive radio waves from each of the beacons 3a that detect vibrations, and individually identify the work content caused by each vibration. For example, acceleration-type beacons may be attached to each of the concrete pipes, concrete pumps, and dryers, which are components of a spraying machine, and the receiver 4 may receive radio waves caused by vibrations in these components, and the analysis unit 11 may determine the work content using each of the concrete pipes, concrete pumps, and dryers. Furthermore, if the construction machine 6 is performing multiple types of operations, the acceleration-type beacons attached to the components may detect multiple types of vibrations, and the analysis unit 11 may analyze the radio waves caused by the vibrations to determine the operation information of the construction machine 6. For example, since the vibrations differ when a dump truck is moving and when it is idling, the analysis unit 11 may generate operation information such as whether it is moving or idling by analyzing the radio waves from the acceleration-type beacons 3a attached to the dump truck. Furthermore, multiple acceleration-type beacons 3a may be used for the same work content. For example, in the case of blasting operations, multiple acceleration-type beacons 3a are attached to construction machinery 6 and equipment inside the tunnel. If vibrations from blasting are detected simultaneously, the analysis unit 11 can analyze the radio waves from the beacons 3a and recognize that blasting has occurred. (c): Examples of applications of beacon-based work progress management include mapping of materials and equipment, water level detection of monitored targets (submersion detection), electrical machinery operation management, door opening and closing management (including construction machinery doors, toilet doors, etc.), seating management (including construction machinery seats, waiting area chairs, etc.), and material quantity management (including cement bags on pallets, etc.). (d): The visualization of work progress using the progress time chart according to this embodiment can also be applied to construction work other than tunnel construction. (e): When generating operational information, the analysis unit 11 can obtain the operating time of the construction machine 6, and can calculate the CO2 emissions of the construction machine 6 based on the operating time and the fuel consumption (known) of the construction machine 6.

[0059] (f) It is also possible to realize technologies that appropriately combine the various technologies described in this embodiment. (g): The software described in this embodiment can be implemented as hardware, and the hardware can be implemented as software. (h): Other components of the present invention may be modified as appropriate without departing from the spirit of the present invention. [Explanation of symbols]

[0060] 1 Processing Unit 2 Display device 3. Beacon (transmitter) 3a Beacon (First Transmitter) 3b Beacon (Second Transmitter) 3c beacon (first transmitter) 4 Receiver 4a, 4b, 4c Receivers (First Receiver) 4D receiver (second receiver) 5. Camera (filming device) 6. Construction machinery (subject to monitoring) 7. Workers (subject to surveillance) 8 Power supply trolley 11 Analysis Department 12 Display Control Unit 13 Transmitter Database 14 Receiver DB 15 Location information DB 16 Operation Information Database

Claims

1. A transmitter attached to construction machinery inside a tunnel, which emits radio waves when it detects power supply or vibration, Multiple first receivers are arranged at predetermined intervals in the direction from the tunnel face toward the tunnel entrance, and convert radio waves received from the transmitter into data and transmit them to a processing unit. The processing device, upon receiving data from the first receiver, identifies the first receiver that received a first radio wave with an intensity equal to or greater than a first threshold from the transmitter, analyzes the data relating to the first radio wave to identify the transmitter that transmitted the first radio wave, and generates operational information including the location information of the construction machine and the operating status of the construction machine. The processing device, upon receiving data from the first receiver, identifies the first receiver that received the second radio wave having an intensity between a second threshold and less than the first threshold, analyzes the data relating to the second radio wave to identify the transmitter that transmitted the second radio wave, and generates the operation information of the construction machine.

2. The progress management system according to claim 1, wherein the first threshold is a value that can be set for each transmitter so that the reception range of the first radio waves by the first receiver is the same.

3. The progress management system according to claim 1, wherein, of the plurality of first receivers, the first receiver located closest to the tunnel face is located on a power supply trolley, and the remaining receivers are located on the inner wall of the tunnel.

4. The tunnel further comprises one or more second receivers located outside the tunnel, The progress management system according to claim 1, wherein the processing device, upon receiving data from the second receiver, identifies the second receiver that received a third radio wave with an intensity of 3 or more from the transmitter, analyzes the data relating to the third radio wave to identify the transmitter that transmitted the third radio wave, and generates location information of the construction machine.

5. The progress management system according to claim 1, further comprising a display device for displaying the aforementioned location information and operational information.

6. Each of a plurality of first receivers, which are arranged at predetermined intervals in the direction from the tunnel face toward the tunnel entrance, is attached to construction machinery inside the tunnel, receives radio waves from a transmitter that emits radio waves when it detects power supply or vibration, converts the radio waves received from the transmitter into data, and transmits it to a processing unit. When the processing device receives data from the first receiver, it identifies the first receiver that received the first radio wave with an intensity equal to or greater than a first threshold, analyzes the data relating to the first radio wave to identify the transmitter that transmitted the first radio wave, and generates operational information including the location information of the construction machine and the operating status of the construction machine. A progress management method comprising the steps of: when the processing device receives data from the first receiver, it identifies the first receiver that received the second radio wave having an intensity of a second threshold or greater than or equal to a second threshold less than the first threshold but less than the first threshold; it analyzes the data relating to the second radio wave to identify the transmitter that transmitted the second radio wave; and it generates the operation information of the construction machine.

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