Transport vehicle estimation system

Abstract

To provide a transport vehicle estimation system capable of accurately estimating a destination transport vehicle and eliminating the need for an operator to check vehicle numbers or perform reselection. [Solution] The transport vehicle estimation system 50 comprises an entry detection unit (control unit 160) that, when it detects the entry of a transport vehicle into a predetermined loading operation area, generates first detection information including the first detection time when the entry was detected and the vehicle identification data (vehicle number) of the transport vehicle, and a list creation unit (control unit 140) that creates a data string consisting of the first detection information arranged in order of the first detection time, and the control unit 140 deletes the first first detection information from the data string when the loading operation onto the transport vehicle by the loading machine is completed.

Description

[Technical Field]

[0001] The present invention relates to a transport vehicle estimation system in a construction management system for a construction site. [Background technology]

[0002] Generally, the soil excavated by a hydraulic excavator is loaded onto a transport vehicle and transported to a designated dump site. The transported soil is then used for embankment work by the hydraulic excavator. Finally, the desired shape, such as a levee or road, is created by excavating and filling the soil.

[0003] At construction sites, the efficiency of transporting this soil and sand is crucial for improving work efficiency. At the same time, to prevent overloading, a load measurement system is introduced to strictly manage the amount of load on transport vehicles. Also, to create an accurate daily report of transport performance, it is necessary to record which transport vehicles the hydraulic excavator has loaded.

[0004] To address this problem, for example, Patent Document 1 discloses a method in which position sensors that detect position information are attached to both the loading machine and the transport vehicle, and the weight of the load loaded on the transport vehicle is calculated based on time-series information on the positions of the loading machine and the transport vehicle. Also known is a method described in Patent Document 2 in which the presence or absence of loading work is estimated from the relative distance between a hydraulic excavator and a transport vehicle. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Publication No. 2021-056688 [Patent Document 2] Patent No. 5973676 Summary of the Invention [Problem to be solved by the invention]

[0006] However, when these methods are used to estimate the transport vehicle carrying the load, errors in the estimation of the transport vehicle due to errors in the position obtained from the position sensor tend to result in inaccurate transport records. This requires the excavator operator to check the vehicle number of the transport vehicle to be loaded and re-input or re-select it in the load measurement system, which reduces work efficiency. Furthermore, if the excavator operator forgets to check the vehicle number of the transport vehicle and re-input or re-select it, the transport record will be inaccurate. An object of the present invention is to provide a transport vehicle identification system that can accurately identify a transport vehicle onto which a load has been loaded by a loading machine, thereby improving work efficiency. [Means for solving the problem]

[0007] A transport vehicle estimation system according to one aspect of the present invention comprises an entry detection unit that, when it detects the entry of a transport vehicle into a predetermined loading operation area, generates first detection information including a first detection time at which the entry was detected and vehicle identification data of the transport vehicle, and a list creation unit that creates a data string consisting of the first detection information arranged in order of the first detection time.The list creation unit identifies the transport vehicle that will be loaded by a loading machine based on the order of the data string, and when completion of the loading operation by the loading machine onto the identified transport vehicle is input, it estimates the transport vehicle that loaded the cargo by the loading machine by deleting the first first detection information from the data string. [Effects of the Invention]

[0008] According to the present invention, the loading destination transport vehicle can be accurately estimated, and the operator does not need to check the vehicle number or perform reselection. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram showing the overall configuration of a construction management system. [Figure 2] FIG. 2 is a block diagram showing a schematic configuration of a transport vehicle estimation system according to the first embodiment of the present invention. [Figure 3] FIG. 3 is a diagram showing a hydraulic excavator, which is an example of a loading machine. [Figure 4] FIG. 4 is a diagram showing an example of a display screen on the display device. [Figure 5] FIG. 5 is a diagram illustrating detection of entry of a transport vehicle into a work site. [Figure 6] FIG. 6 is a flowchart showing the process flow of the transport vehicle estimation program. [Figure 7] FIG. 7 is an enlarged view of a work site in the second embodiment. [Figure 8] FIG. 8 is a flowchart showing the flow of processing of the transport vehicle estimation program in the second embodiment. [Figure 9] FIG. 9 is a diagram showing an example of a data string generated in time series. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an embodiment of a transport vehicle estimation system according to the present invention will be described with reference to the drawings. The following description and drawings are examples for explaining the present invention, and omissions and simplifications have been made as appropriate for clarity of explanation. Furthermore, in the following description, identical or similar elements and processes are given the same reference numerals, and duplicate explanations may be omitted. Note that the content described below merely shows one example of an embodiment of the present invention, and the present invention is not limited to the following embodiment, and can be implemented in various other forms.

[0011] (First embodiment) FIG. 1 is a diagram showing the overall configuration of a construction management system 10. The construction management system 10 is configured to transmit position information of a loading machine 11, such as a hydraulic excavator, and position information of a transport vehicle 12, such as a dump truck, at a work site 100 to a server 14 via an internet communication line 18. Specifically, the loading machine 11 and the transport vehicle 12 (12a) are equipped with smartphones as information terminals 15, 16 (16a), and the transport vehicle 12 (12b) is equipped with an in-vehicle terminal as an information terminal 16 (16b). The information terminals 15, 16 (16a) may be carried by the drivers. The information terminals 15, 16 receive radio waves from multiple positioning satellites 17 that constitute a global navigation satellite system (GNSS) and transmit position information obtained by calculations using those radio waves to the server 14 via the internet communication line 18.

[0012] At the site office 200, an internet-connected PC (personal computer) 19 or smartphone 20 can be used to access the server 14 via a browser and check the current locations of the loading machine 11 and transport vehicle 12 on a map display screen. Each information terminal 15, 16, which is made up of a smartphone, not only transmits its own location information, but also receives location information of information terminals 15, 16 within the same work site 100 from the server 14, making it possible to grasp the locations of the loading machine 11 and transport vehicle 12 within the same work site 100.

[0013] FIG. 2 is a block diagram showing a schematic configuration of a transport vehicle estimation system 50 according to a first embodiment of the present invention. The transport vehicle estimation system 50 estimates the loading order and loading amount of each transport vehicle (described later) using notification information from the construction management system 10. In the example shown in FIG. 2, the transport vehicle estimation system 50 is composed of information terminals 15 and 16, a server 14, a weight detection device 30 mounted on the loading machine 11, and a PC 19 installed in the site office 200. The smartphone 20 shown in FIG. 1 may be used instead of the PC 19. Note that while FIG. 1 shows multiple information terminals 16a and 16b for multiple transport vehicles 12a and 12b, the transport vehicle 12 and information terminal 16 in FIG. 2 are shown as representative examples.

[0014] The server 14 includes a control unit 140, a storage unit 141, and a communication device 142. The control unit 140 is configured using, for example, a CPU (Central Processing Unit), and executes a transport vehicle estimation program related to transport vehicle management to generate a data sequence related to the waiting order of transport vehicles 12 at the work site 100 and vehicle loading information, which is information related to the loading amount of each transport vehicle 12. Details of the processing by the control unit 140 will be described later. The communication device 142 communicates with the information terminals 15 and 16, the weight detection device 30 of the loading machine 11, and each communication device provided in the PC 19 via the Internet communication line 18. Data generated by the control unit 140 and information obtained via the communication device 142 are stored in the storage unit 141 as appropriate.

[0015] The weight detection device 30 mounted on the loading machine 11 includes a control unit 300, a communication device 301, a hydraulic sensor 302, and an attitude sensor 303. Fig. 3 is a diagram showing a hydraulic excavator 11A, which is an example of the loading machine 11 on which the weight detection device 30 shown in Fig. 2 is mounted. Note that, although the following description will be given taking the loading machine 11 as an example, where the loading machine 11 is a hydraulic excavator, the loading machine 11 is not limited to a hydraulic excavator and may be, for example, a work machine such as a wheel loader or a crane.

[0016] The hydraulic excavator 11A is equipped with an engine 111 as a power source and a main pump 112 driven by the engine 111. A lower traveling body 113, an upper rotating body 114, and a front device 115 are each operated independently by the hydraulic oil discharged from the main pump 112.

[0017] The lower traveling body 113 has a pair of left and right crawlers 116 and a traveling hydraulic motor 117. The traveling hydraulic motor 117 is rotationally driven by hydraulic oil supplied from the main pump 112, driving the crawlers 116 and causing the lower traveling body 113 to travel. The upper rotating body 114 is connected vertically to the lower traveling body 113 via a swing device (not shown) that has a swing hydraulic motor 118. The swing hydraulic motor 118 is rotationally driven by hydraulic oil supplied from the main pump 112, causing the upper rotating body 114 to swing relative to the lower traveling body 113.

[0018] The front device 115 is mounted on the upper rotating body 114 and has a boom 119, a boom cylinder 120 for driving the boom 119, an arm 121, an arm cylinder 122 for driving the arm 121, a bucket 123, and a bucket cylinder 124 for driving the bucket 123. The boom cylinder 120, arm cylinder 122, and bucket cylinder 124 each extend and contract using hydraulic oil sent from the main pump 112, and drive the boom 119, arm 121, and bucket 123, respectively.

[0019] Although not shown, each of the boom cylinder 120, arm cylinder 122, and bucket cylinder 124 is equipped with a hydraulic sensor 302 (see FIG. 2) that measures the hydraulic pressure inside the cylinder tube. Note that the hydraulic sensor 302 only needs to be provided in at least the boom cylinder 120 that drives the boom 119 relative to the upper rotating body 114, and does not necessarily have to be provided in the other arm cylinder 122 and bucket cylinder 124. The hydraulic sensor 302 measures the hydraulic pressure inside the cylinder tubes of the boom cylinder 120, arm cylinder 122, and bucket cylinder 124, for example, and outputs hydraulic pressure information corresponding to the measured hydraulic pressure to the control unit 300.

[0020] The boom 119 is rotatably supported on the upper rotating structure 114 via a boom pin. The arm 121 is rotatably supported on the boom 119 via an arm pin. The bucket 123 is rotatably supported on the arm 121 via a bucket pin. The attitude sensor 303 shown in FIG. 2 is, for example, an angle sensor provided on each of the boom pin, the arm pin, and the bucket pin. The attitude sensor 303 detects the rotation angle of the boom 119 relative to the upper rotating structure 114, the rotation angle of the arm 121 relative to the boom 119, and the rotation angle of the bucket 123 relative to the arm 121. Note that the attitude sensor 303 is not limited to an angle sensor. For example, another sensor capable of detecting the attitude of the front device 115, such as an acceleration sensor or a gyro sensor, can also be used as the attitude sensor 303.

[0021] The upper rotating body 114 is provided with a cabin for an operator to ride in. The operator of the hydraulic excavator 11A sits in a driver's seat installed in this cabin and controls the operations of the lower traveling body 113, the upper rotating body 114, and the front device 115 by operating an operating lever (not shown) installed near the driver's seat. This allows the hydraulic excavator 11A to perform work such as excavation and ground leveling. The upper rotating body 114 is equipped with a weight detection device 30 shown in FIG. 2.

[0022] 2 detects the weight of a load held by the bucket 123 of the loading machine 11. The hydraulic sensor 302 detects the hydraulic pressure inside the cylinder tube of the boom cylinder 120, for example, at a predetermined cycle, and outputs the hydraulic pressure to the control unit 300. The attitude sensor 303 detects the attitude of the front device 115, such as the angle of the boom 119 relative to the upper rotating body 114, the angle of the arm 121 relative to the boom 119, and the angle of the bucket 123 relative to the arm 121, at a predetermined cycle, and outputs the attitude to the control unit 300.

[0023] The control unit 300 calculates the weight of the load (e.g., earth and sand) held by the bucket 123 of the front device 115 based on the hydraulic pressure information and attitude information input from the hydraulic pressure sensor 302 and attitude sensor 303, and dimensional information of each part of the front device 115. The dimensional information of each part of the front device 115 is stored in advance in a memory (not shown) of the control unit 300. The weight detection device 30 transmits weight information including the calculated weight and the time when the weight was detected to the server 14 via the communication device 301. When the transport vehicle 12 is loaded multiple times with the bucket 123, multiple pieces of weight information are transmitted to the server 14, and each of the weight information is stored in the memory unit 141 of the server 14.

[0024] 2, the information terminal 15 includes a control unit 150, a display device 151, a communication device 152, and a position sensor 153. The information terminal 16 includes a control unit 160, a display device 161, a communication device 162, and a position sensor 163. The information terminals 15 and 16 have the same configuration, but are denoted by different reference numerals in order to distinguish between the information terminal provided in the loading machine 11 and the information terminal provided in the transport vehicle 12.

[0025] The information terminals 15 and 16 receive radio waves from a plurality of positioning satellites 17 that make up a Global Navigation Satellite System (GNSS), and transmit location information obtained by calculation using those radio waves to the server 14 via an Internet communication line 18. The control units 150 and 160 are configured with a microcomputer or the like, and include a processor such as a CPU, a memory, and the like.

[0026] In the information terminal 15 of the operator of the loading machine 11, a transport vehicle management program for the loading machine is executed by the control unit 150. When the transport vehicle management program is executed, a display screen such as that shown in FIG. 4 is displayed on the display device 151 of the information terminal 15. A list of transport vehicles 12 that have arrived at the work site 100 is displayed in the display area 40. In the illustrated display example, sets of the vehicle numbers (such as "12-34") of the transport vehicles 12 and the first detection times (hh:mm:ss) that are the arrival times are displayed from top to bottom in the order of arrival. In the display area 41, the vehicle numbers of the transport vehicles (loading vehicles) 12 currently performing loading operations, i.e., the first vehicle number displayed in the display area 40, are displayed.

[0027] The weight being loaded onto the transport vehicle 12 with the vehicle number "12-34" of the transport vehicle currently being loaded and displayed in the display area 41 is displayed below the display area 41. The information terminal 15 acquires weight information stored in the memory unit 141 of the server 14 and displays this weight based on the weight information. The loading end button icon 42 is displayed below the display area 40. When loading onto the transport vehicle (loading vehicle) 12 displayed in the display area 41 is completed, the operator of the loading machine 11 touches the icon 42 to input to the information terminal 15 that the loading operation onto the transport vehicle 12 has been completed. When the icon 42 is operated to input the completion of the loading operation, the information terminal 15 transmits a loading end signal to the server 14 via the communication device 152. The loading end signal includes the vehicle number of the loading vehicle and the end time (the time when the icon 42 was operated).

[0028] In the information terminal 16 of the driver of the haulage vehicle 12, a haulage vehicle management program for the haulage vehicle is executed by the control unit 160. A display screen generated by the haulage vehicle management program is displayed on the display device 161. Although the display screen is not shown, for example, a display screen with the icon 42 removed from the display example shown in FIG. 4 is displayed. By displaying such a screen, the driver can confirm the loading order of his / her vehicle. The communication device 162 communicates with the server 14 via the Internet communication line 18.

[0029] The position sensors 153, 163 calculate the position of the information terminals 15, 16 on which the position sensors 153, 163 are installed, using radio waves from the positioning satellite 17. The information terminals 15, 16 constantly transmit delivery vehicle position information, including the calculated position, the calculation time, and the vehicle number, to the server 14 via the communication devices 152, 162. Furthermore, as will be described later, when the delivery vehicle 12 equipped with the information terminal 16 enters the work site 100, the information terminal 16 transmits first detection information to the server 14 notifying that the delivery vehicle 12 has entered the work site 100.

[0030] (Explanation of the transport vehicle estimation system 50) Next, details of the transport vehicle estimation system 50 will be described with reference to FIGS. 5 and 6. FIG. 5 is a diagram illustrating detection of entry of a transport vehicle 12 into the work site 100. For example, the work site area is set by accessing the web management screen of the server 14 using the PC 19 of the site office 200 in FIG. 1 and drawing the area of ​​the work site 100 on a map on the web management screen. Each transport vehicle 12 enters the work site 100 (work site area) from the site entrance where the access road R1 is provided. In the example shown in FIG. 5, there are two transport vehicles 12 (12a, 12b) within the work site 100, and the image shows the moment when another transport vehicle 12 (12c) enters the work site 100 from the access road R1. A loading operation is being performed on the transport vehicle 12a by the loading machine 11. Also, a transport vehicle 12 (12d) is heading toward the work site 100.

[0031] As described above, the control unit 160 of the information terminal 16 (16a to 16d) of the delivery vehicle 12 executes the delivery vehicle management program and acquires position information of the work site area from the server 14. When the position obtained by the position sensor 163 of each information terminal 16 (16a to 16d) changes from outside the area of ​​the work site 100 to inside the area of ​​the work site 100, the control unit 160 of each information terminal 16 (16a to 16d) transmits first detection information to the server 14 notifying that the delivery vehicle 12 equipped with that information terminal 16 (16a to 16d) has entered the work site 100. The first detection information includes the first detection time, which is the time of entry detection, and the vehicle number, which is the identification data of the delivery vehicle 12.

[0032] Fig. 6 is a flowchart showing the flow of processing of a transport vehicle estimation program executed by the control unit 140 of the server 14. The control unit 140 performs the processing shown in the flowchart of Fig. 6 at predetermined calculation intervals.

[0033] In step S10, the server 14 determines whether or not it has received the first detection information, and if it has received it proceeds to step S20, and if it has not received it ends the processing in Fig. 6. As described above, the first detection information includes the first detection time and the vehicle number of the transport vehicle 12.

[0034] In step S20, the received first detection information is added to the end of a data string consisting of first detection information items arranged in order of first detection time. If the data string has not yet been generated at the time of processing in step S20 (i.e., if no data string has been stored in storage unit 141 of server 14), a data string with the received first detection information as the first data item is generated.

[0035] In step S30, it is determined whether or not the above-mentioned loading completion signal has been received from the information terminal 15 of the loading machine 11. If it is determined in step S30 that the signal has been received, the process proceeds to step S40, and if it is determined that the signal has not been received, the process in FIG. 6 ends.

[0036] In step S40, the first data (first detection information) is deleted from the data string made up of the first detection information arranged in order of the first detection time. The data string stored in storage unit 141 is replaced with a new data string from which the first data has been deleted.

[0037] In step S50, the loading amount, which is the sum of one or more weights stored in the memory unit 141, is calculated, and vehicle loading information is generated including the calculated loading amount and the vehicle number included in the received loading completion signal. As described above, the weight detection device 30 of the loading machine 11 transmits weight information to the server 14 every time loading is performed with the bucket 123 onto the same transport vehicle 12. The weight information is stored in the memory unit 141. When a loading completion signal is received from the information terminal 15 upon completion of the loading operation, weights are extracted from each piece of weight information stored in the memory unit 141, and the sum of these is calculated.

[0038] In step S60, all weight information stored in the storage unit 141 is cleared (deleted).

[0039] As described above, in the first embodiment, by using the time (first detection time) when the transport vehicle 12 enters the work site 100, even if two transport vehicles enter the work site 100 side by side, the entry times (first detection times) are clearly different and the entry times (first detection times) are not reversed. Therefore, the entry order of the transport vehicles 12 to the work site 100, i.e., the loading order, can be accurately determined.

[0040] Furthermore, the data string in which the first detection information including the vehicle numbers of the transport vehicles 12 are arranged in chronological order corresponds to the data string of vehicle numbers arranged in order of arrival. When the operator touches the icon 42 on the display screen to input the completion of the loading operation, the first data in the data string is deleted. As a result, the order of the vehicle numbers of the transport vehicles 12 waiting for loading operation is always accurately reflected in the data string. This makes it possible to accurately estimate the transport vehicles 12 that have loaded goods by the loading machine 11 from the data string without the operator of the loading machine 11 having to perform the vehicle number confirmation or reselection work as in the conventional case, thereby eliminating these work steps.

[0041] Furthermore, by displaying a list of vehicle numbers based on the data string as shown in Fig. 4 on the information terminal 15 provided on the loading machine 11, the operator can easily check the vehicle numbers of the loading vehicles and waiting transport vehicles 12 and their order, which reduces the workload of the operator.

[0042] (Second embodiment) 7 to 9 are diagrams illustrating a transport vehicle estimation system according to a second embodiment of the present invention. FIG. 7 is an enlarged view of a work site 100 in the second embodiment, and corresponds to FIG. 5 of the first embodiment. Note that the server 14, positioning satellite 17, internet communication line 18, etc. are omitted from FIG. 7. In the second embodiment, the information terminal 15 of the loading machine 11 can set a loading machine range 400 that includes the position of the loading machine 11. In the example shown in FIG. 7, the loading machine range 400 is a circle centered on the position of the information terminal 15, but the shape of the loading machine range 400 is not limited to a circle. Furthermore, the size (i.e., radius) of the loading machine range 400 can be set to any value.

[0043] The work site 100 is provided with a toilet 110 for workers as a location where the transport vehicle 12 may stop. The toilet 110 can also be used by the driver of the transport vehicle 12. In the example shown in FIG. 7, the order of arrival at the work site 100 is transport vehicle 12a, transport vehicle 12b, transport vehicle 12c, and transport vehicle 12d, and loading work is being carried out onto transport vehicle 12a. In order to use the toilet 110, transport vehicle 12b leaves the waiting line of vehicles and moves to the location of the toilet 110.

[0044] If the loading operation onto the transport vehicle 12a is completed while the driver of the transport vehicle 12b is using the toilet 110, the transport vehicle 12c at the head of the waiting convoy moves to the vicinity of the loading machine 11 in the loading machine range 400, and the loading operation onto the transport vehicle 12c begins. Then, the transport vehicle 12b returns to the waiting convoy after using the toilet and lines up, for example, at the end of the convoy (behind the transport vehicle 12d). In this way, if the transport vehicle 12 stops at a stop-off point within the work site (for example, the toilet 110), the order of the convoy may differ from the order of arrival at the work site 100. However, even if such a situation occurs, in the second embodiment, the loading order can be correctly determined from the data sequence by correcting the above-mentioned data sequence as described below.

[0045] The configuration of the haulage vehicle estimation system 50 is the same as that shown in FIG. 2. The setting conditions for the loading machine range 400 are also transmitted to the information terminal 16 of each haulage vehicle 12 via the server 14 and applied to a haulage vehicle management program executed by the control unit 160 of each information terminal 16. The haulage vehicle management program determines that the haulage vehicle 12 has entered the loading machine range 400 when the position calculated by the position sensor 163 of the information terminal 16 changes from outside to inside the loading machine range 400. Then, second detection information notifying the entry of the haulage vehicle 12 into the loading machine range 400 is transmitted to the server 14 via the communication device 162. The second detection information includes a second detection time, which is the time when the entry into the loading machine range 400 was detected, and a vehicle number, which is identification data of the haulage vehicle 12. In the haulage vehicle estimation system 50 of the second embodiment, the second detection information is also used to generate the data string in addition to the first detection information described above.

[0046] Next, a data string generation procedure in the transport vehicle estimation system 50 of the second embodiment will be described with reference to Figures 8 and 9. Figure 8 is a flowchart showing the processing flow of the transport vehicle estimation program in the second embodiment. The control unit 140 of the server 14 performs the processing shown in the flowchart in Figure 8 at predetermined calculation intervals.

[0047] FIG. 9 shows an example of a generated data string, illustrating data strings at times t1 to t11. In FIG. 9, from the left, the first column indicates the data string number, the second column indicates the time the data string was generated, and the third column indicates the data string. In the area marked 1G to the right of the dashed line in the third column, data groups of the first detection information are arranged in chronological order. In the area marked 2G to the left of the dashed line in the third column, data groups of the second detection information are arranged in chronological order. The fourth column lists the steps in the flowchart in FIG. 8 related to the generation of the data string for that row. Note that in the example shown in FIG. 9, the number of data in the second group, i.e., the number of transport vehicles 12 that can enter the loading machine range 400, is set to 2, but the number of vehicles that can enter varies depending on the size of the loading machine range 400.

[0048] The data contained in the data string is divided into two groups: a first group listed in the firstG column and a second group listed in the secondG column. The data contained in the first group is the first detection information, and the data contained in the second group is the second detection information. Symbols A to F represent the vehicle numbers contained in the first detection information and the second detection information. In FIG. 9, to simplify the display of the data string, the first detection information and the second detection information constituting the data string are represented by the vehicle numbers contained in the detection information. Furthermore, A1 and A2 represent the vehicle number A of the same transport vehicle 12, and when it is contained in the first detection information it is represented as A1, and when it is contained in the second detection information it is represented as A2.

[0049] In the flowchart shown in Figure 8, the processing in steps S10 and S20 is the same as the processing in corresponding steps S10 and S20 in Figure 6. That is, when first detection information is received in step S10, the received first detection information is added to the end of a data string consisting of the first detection information in step S20. The first detection information includes the first detection time (the time when the haulage vehicle 12 entered the work site 100) and the vehicle number of the haulage vehicle 12.

[0050] The data strings at times t1 and t2 in Figure 9 are generated by the processing of steps S10 and S20. That is, when a delivery vehicle 12 with vehicle number A (vehicle number A) enters the work site 100 at time t1, the server 14 receives the first detection information (vehicle number A1) (step S10), and a data string (A1) is generated (step S20). Similarly, when a delivery vehicle 12 with vehicle number B (vehicle number B) enters the work site 100 at time t2, the server 14 receives the first detection information (vehicle number B1) (step S10), and a data string (A1, B1) is generated.

[0051] In step S110 of Fig. 8, it is determined whether or not the second detection information has been received, and if it has been received, the process proceeds to step S120, and if it has not been received, the process of Fig. 8 ends. In step S120, a correction process for the data string is performed.

[0052] 9 is generated by the processes of steps S110 and S120. That is, when the transporter vehicle 12 (vehicle number A) enters the loading machine range 400 at time t3, the server 14 receives the second detection information (vehicle number A2) (step S110), and generates a data sequence (A2, B1) by correcting the data sequence (A1, B1) (step S120). In the correction process of step S120, the following process is performed.

[0053] The procedure for the correction process in step S120 will be described with reference to FIG. 9. First, in the first group, the first detection information containing the same vehicle number A (= A1) as the vehicle number A (= A2) contained in the second detection information is deleted from the data string. Next, in the second group, the received second detection information (vehicle number A2) is added to the end of the data of the second group. Note that since there is no data of the second group in the second row (time t2) of FIG. 9, only the second detection information (vehicle number A2) becomes the data of the second group in the third row (time t3). Then, the first detection information of the first group arranged in chronological order is placed at the end of the second detection information of the second group arranged in chronological order, which becomes a new data string.

[0054] Steps S30 to S60 in Fig. 8 are the same as the corresponding steps S30 to S60 in Fig. 6. Here, the processing of steps S30 and S40 will be described with reference to Fig. 9. For example, at time t7 in Fig. 9, the second detection information is arranged in the order of vehicle numbers A2 (= A) and B2 (= B) in the second group, and the first detection information is arranged in the order of vehicle numbers C1 (= C), D1 (= D), and E1 (= E) in the first group. That is, two transport vehicles 12 (vehicle number A) and 12 (vehicle number B) are included in the loading machine range 400 in Fig. 7, and loading work is performed onto the transport vehicle 12 (vehicle number A). Furthermore, the transport vehicles 12 are lined up in the waiting queue outside the loading machine range 400 in the order of vehicle number C, vehicle number D, and vehicle number E. At the next time t8, when the server 14 receives a loading completion signal (step S30), it deletes the first data (second detection information (vehicle number A2)) from the data string (A2, B2, C1, D1, E1) (step S40).

[0055] 7, the work site 100 is provided with a toilet 110, and the driver of the transport vehicle 12b may leave the waiting line to use the toilet 110. When the transport vehicle 12b returns to the waiting line, it generally lines up at the end of the waiting line (behind the transport vehicle 12d). In other words, the order of loading the transport vehicles 12 differs from the order in which the transport vehicles 12 enter the work site 100.

[0056] Therefore, in the second embodiment, a loading machine range 400 is set around the loading machine 11, and when the transport vehicle 12 enters the loading machine range 400, second detection information is generated (step S110), and the second detection information is used to correct the data string representing the loading order of the transport vehicle 12 (step S120).

[0057] For example, let us consider a case where at time t6 in Figure 9, a delivery vehicle 12 (vehicle number D1) lined up at the end of the waiting line of vehicles leaves the waiting line to use the toilet 110, and then returns to the waiting line at time t9. In this case, the order of the vehicle numbers listed in the first group from time t7 to t11 in Figure 9 will differ from the actual waiting order of the delivery vehicles 12. If the actual waiting order of the delivery vehicles 12 in the first group is expressed by vehicle numbers, it is (C1, E1) at time t7, (C1, E1) at time t8, (E1, D1) at time t9, (E1, D1) at time t10, and (E1, D1, F1) at time t11.

[0058] However, the order of the vehicle numbers in the second group matches the order of the vehicle numbers of the transport vehicles 12 lined up in the loading machine range 400 by providing the processes of steps S110 and S120.

[0059] At time t11, the actual waiting order in the first group is (E1, D1, F1) as described above. Therefore, when the transport vehicle 12 (vehicle number E) enters the loading machine range 400 at time t12, the server 14 receives the second detection information (vehicle number E2) (step S110).

[0060] In the correction process of step S120, first, in the first group, the first detection information including the same vehicle number E (= E1) as the vehicle number E (= E2) included in the second detection information is deleted from the data string, and then, in the second group, the received second detection information (vehicle number E2) is added to the end of the data of the second group. As a result, the order of the vehicle numbers in the first group becomes (D1, F1), and the order of the vehicle numbers in the second group becomes (C2, E2).

[0061] In this way, even if the transport vehicle 12 leaves the waiting queue and then returns to the waiting queue, the data string is corrected so that the order of the vehicle numbers in the second group is correct. As a result, the vehicle number of the first data in the data string matches the vehicle number of the loading vehicle. As a result, it is possible to know how much cargo has been loaded onto each transport vehicle 12 from the vehicle loading information created in step S50. For example, an accurate daily report on vehicle transportation can be created using the vehicle loading information stored in the server 14.

[0062] In the first and second embodiments described above, the generation of data strings and vehicle loading information is performed by the server 14, but these may also be generated by the PC 19 of the site office 200 or by the information terminal 15 of the loading machine 11.

[0063] According to the embodiment of the present invention described above, the following advantageous effects are achieved.

[0064] (1) As shown in Figures 2, 5, 6, etc., the transport vehicle estimation system 50 includes an entry detection unit (control unit 160) that, when it detects the entry of a transport vehicle 12 into a predetermined loading work area (work site 100), generates first detection information including the first detection time at which the entry was detected and vehicle identification data (vehicle number) of the transport vehicle 12, and a list creation unit (control unit 140) that creates a data string consisting of the first detection information arranged in order of the first detection time.The control unit 140 identifies the transport vehicle 12 that will be the loading destination by the loading machine 11 based on the order of the data string, and when the completion of the loading work by the loading machine 11 onto the identified transport vehicle 12 is input, it estimates the transport vehicle 12 that has loaded the cargo by the loading machine 11 by deleting the first first detection information from the data string.

[0065] As described above, by using the time (first detection time) when the transport vehicle 12 enters the work site 100, the arrangement order of the first detection information in the data string, i.e., the order of the vehicle numbers, becomes the same order as the arrangement of the vehicle numbers in the order of arrival of the transport vehicles 12. Based on the order of the vehicle numbers in this data string, the transport vehicle 12 to be loaded by the loading machine 11 is identified. Then, when the completion of the loading operation on this transport vehicle 12 is input from the information terminal 15 of the loading machine 11, the first first detection information is deleted from the data string. As a result, the arrangement order of the vehicle numbers in the data string matches the arrangement order of the vehicle numbers of the transport vehicles 12 lined up at the work site 100 with the loading vehicle at the head. Therefore, it is possible to accurately estimate the transport vehicle 12 that has loaded the cargo by the loading machine 11, and it is possible to eliminate the need for the operator of the loading machine 11 to check the vehicle number or reselect the vehicle, as in the conventional system.

[0066] (2) In (1) above, as shown in Figures 2, 7 to 9, etc., a loading machine range 400 of a predetermined width is further set which includes the position of the loading machine 11, and when the entry detection unit (control unit 160) detects the entry of the transport vehicle 12 into the loading machine range 400 after the first detection time, it further generates second detection information which includes the second detection time at which the entry was detected and the vehicle identification data (vehicle number) of the transport vehicle 12. For example, the list creation unit (control unit 140) deletes the first detection information containing the vehicle number E1 (=E) that is the same as the vehicle number E2 (=E) contained in the second detection information generated from the group consisting of the first detection information from the data sequence (C2, D1, E1, F1) at time t11 in Figure 9, generates a first data group (D1, F1) arranged in order of the first detection time, adds the generated second detection information (vehicle number E2) to the group consisting of the second detection information, generates a second data group (C2, E2) arranged in order of the second detection time, and places the first data group (D1, F1) at the end of the second data group (C2, E2) to create a new data sequence (C2, E2, D1, F1).

[0067] By the processing of the list creation unit (control unit 140) as described above, the vehicle number of the first data in the data string will match the vehicle number of the loading vehicle. By matching the loading amount by the loading machine 11 with the loading vehicle (transport vehicle 12), it is possible to know how much loading amount has been loaded onto which transport vehicle 12. Therefore, it is possible to eliminate the need for the operator of the loading machine 11 to check the vehicle number or reselect the vehicle, as in the conventional system.

[0068] (3) In the above (1), as shown in Figures 2, 6, etc., the transport vehicle estimation system 50 further includes a loading data generation unit (control unit 140) that generates vehicle loading information (step S50) including the vehicle identification data (vehicle number) included in the deleted leading first detection information and the loading amount by the loading machine 11, upon input of the completion of the loading work on the transport vehicle 12 by the loading machine 11 (step S30). The generated vehicle loading information makes it possible to know how much loading amount has been loaded onto which transport vehicle 12.

[0069] (4) In (1) above, as shown in Figures 2, 4, etc., the loading machine 11 is equipped with an information terminal 15 provided with a display unit (display device 151) that displays a list of data strings and an input unit (icon 42) into which the loading machine operator inputs a command to complete the loading work, and the list creation unit (control unit 140) deletes the first detection information at the top of the data string when a command to complete the loading work is input by operating the icon 42. The operator of the loading machine 11 can complete the loading work while checking the loading vehicle on the list displayed on the display device 151.

[0070] The above-described embodiments and various modifications are merely examples, and the present invention is not limited to these, as long as the features of the invention are not impaired. Other embodiments that can be conceived within the scope of the technical idea of ​​the present invention are also included within the scope of the present invention. [Explanation of symbols]

[0071] 10...construction management system, 11...loading machine, 11A...hydraulic excavator, 12, 12a to 12d...transport vehicle (loading vehicle), 14...server, 15, 16, 16a to 16d...information terminal, 19...PC, 30...weight detection device, 40, 41...display area, 42...icon (input unit), 100...work site, 110...toilet, 140...control unit (list creation unit, loading data generation unit), 150, 300...control unit, 160...control unit (entry detection unit), 141...memory unit, 142, 152, 162, 301...communication device, 151...display device (display unit), 161...display device, 153, 163...position sensor, 200...site office, 302...hydraulic sensor, 303...posture sensor, 400...loading machine range

Claims

1. an entry detection unit that, when detecting entry of a transport vehicle into a predetermined loading operation range, generates first detection information including a first detection time at which the entry was detected and vehicle identification data of the transport vehicle; a list creation unit that creates a data string consisting of the first detection information arranged in order of the first detection time, The list creation unit identifies the transport vehicle to be loaded by the loading machine based on the order of the data string, and when completion of loading work by the loading machine onto the identified transport vehicle is input, the list creation unit deletes the first detection information at the beginning of the data string, thereby estimating the transport vehicle onto which the cargo was loaded by the loading machine.

2. The transport vehicle estimation system according to claim 1, A loading machine range of a predetermined width including the position of the loading machine is further set within the loading operation range, When the entry detection unit detects the entry of the transport vehicle into the loading machine range after the first detection time, the entry detection unit further generates second detection information including a second detection time at which the entry was detected and the vehicle identification data of the transport vehicle, The list creation unit generating a first data group arranged in order of the first detection time by deleting first detection information that includes vehicle identification data identical to vehicle identification data included in the generated second detection information from the group consisting of the first detection information; adding the generated second detection information to a group consisting of the second detection information to generate a second data group arranged in order of the second detection time; a new data string is created by arranging the first data group at the end of the second data group; Transport vehicle estimation system.

3. The transport vehicle estimation system according to claim 1, A transport vehicle estimation system further comprising a loading data generation unit that generates vehicle loading information including the vehicle identification data contained in the deleted first detection information and the loading amount by the loading machine upon input of completion of loading work onto the transport vehicle by the loading machine.

4. The transport vehicle estimation system according to claim 1, the loading machine is equipped with an information terminal provided with a display unit that displays the list of data strings and an input unit into which a loading machine operator inputs a command to complete the loading work, The transport vehicle estimation system is characterized in that the list creation unit deletes the first detection information at the beginning from the data string when a command to complete the loading operation is input by the input unit.

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