JP2020095661A - Construction data management system and manufacturing method thereof - Google Patents

Abstract

To prevent alteration of construction data.SOLUTION: A construction data management system includes: a management network in which a plurality of nodes are connected to each other; a first terminal that transmits first data related to construction data to each of the nodes; and a second terminal. When an agreement of the plurality of nodes is formed regarding the first data transmitted from the first terminal, each of the nodes saves second data based on the first data and transmits third data related to the second data to the second terminal. The first terminal transmits data related to the construction data to the second terminal. The second terminal confirms authenticity of the data related to the construction data obtained from the first terminal based on the third data.SELECTED DRAWING: Figure 1

Description

The present invention relates to a construction data management system and a manufacturing method thereof.

Information regarding various types of construction is required to be appropriately managed and stored according to various regulations. Therefore, a management system for managing information about construction has been proposed.

For example, Patent Document 1 discloses the following system for preventing alteration of construction data. In this system, the time stamp data of the construction data is generated by the time stamp station which is a third party organization independent from the construction company, the construction machine maker, the worker and the like. This time stamp data is generated by adding time information to the hash value of the construction data and encrypting it with an encryption key. When verifying the construction data, the time stamp added construction data stored in the server is acquired, the time stamp data is decrypted, and the hash value is acquired. This hash value is compared with the hash value of the construction data included in the time stamp added construction data to determine the tampering of the construction data. In this way it is guaranteed that the construction data has not been tampered with.

For example, Patent Literature 2 discloses a construction management system in which the construction execution terminal transmits various data acquired by the construction execution terminal at the time of construction related to a pile to the management server and deletes the data from the construction execution terminal. The reliability of the data is improved by not leaving the data to the contractor.

Despite different technical fields, for example, Patent Document 3 discloses a system for managing a manufacturing process of a product. This process management system includes a distributed storage system in which arithmetic units functioning as a plurality of nodes are connected by a network to store manufacturing processes. The distributed storage system increases the difficulty level of tampering by creating block data based on process information and storing the block data and past block data in a time series manner.

Moreover, it is preferable that the information regarding the construction to be stored is correct information that has been authenticated by an appropriate person. For example, Patent Document 3 discloses that only data that has been approved by the administrator is stored.

JP, 2017-157879, A JP, 2008-053468, A JP, 2018-169798, A

An object of the present invention is to prevent alteration of stored construction data.

According to an aspect of the present invention, a construction data management system includes a management network in which a plurality of nodes are connected to each other, and a first terminal that transmits first data relating to construction data to each of the plurality of nodes. , And a second terminal. Each of the plurality of nodes stores second data based on the first data when an agreement of the plurality of nodes is formed with respect to the first data transmitted from the first terminal. Then, the third data related to the second data is transmitted to the second terminal. The first terminal transmits data regarding the construction data to the second terminal. The second terminal confirms the authenticity of data regarding the construction data acquired from the first terminal based on the third data.

According to the present invention, falsification of stored construction data is prevented.

FIG. 1 is a block diagram showing an outline of a configuration example of a management system according to the first embodiment. FIG. 2 is a block diagram illustrating an outline of a configuration example of an information processing device included in the management system according to the embodiment. FIG. 3 is a diagram showing an outline of an example of a data structure of a block chain in which data according to the embodiment is stored. Drawing 4A is a figure for explaining the outline of an example of construction data concerning an embodiment. Drawing 4B is a figure for explaining the outline of an example of construction data concerning an embodiment. FIG. 5A is a sequence diagram showing an outline of an example of a data flow according to the first example of the embodiment. FIG. 5B is a sequence diagram illustrating an outline of an example of a data flow according to the second example of the embodiment. FIG. 5C is a sequence diagram illustrating an outline of an example of a data flow according to the third example of the embodiment. FIG. 5D is a sequence diagram showing an outline of an example of a data flow according to the fourth example of the embodiment. FIG. 5E is a sequence diagram illustrating an outline of an example of a data flow according to the fifth example of the embodiment. FIG. 5F is a sequence diagram showing an outline of an example of a data flow according to the sixth example of the embodiment. FIG. 5G is a sequence diagram illustrating an outline of an example of a data flow according to the seventh example of the embodiment. FIG. 5H is a sequence diagram showing an outline of an example of a data flow according to the eighth example of the embodiment. FIG. 6 is a diagram for explaining an example of a combination of various data according to the embodiment. FIG. 7 is a flowchart showing an outline of an example of the operation of the on-site manager PC according to the embodiment. FIG. 8A is a flowchart showing an outline of an example of the operation of the node according to the embodiment. FIG. 8B is a flowchart showing an outline of an example of the operation of the node according to the embodiment. FIG. 9A is a flowchart showing an outline of an example of the operation of the confirmer PC according to the embodiment. FIG. 9B is a flowchart showing an outline of an example of the operation of the confirmer PC according to the embodiment. FIG. 10 is a sequence diagram for explaining an example of the flow of data stored by the management network. FIG. 11 is a block diagram showing an outline of a configuration example of the management system according to the second embodiment. FIG. 12A is a sequence diagram showing an outline of an example of a data flow according to the second embodiment. FIG. 12B is a sequence diagram showing an outline of an example of a data flow according to the second embodiment. FIG. 12C is a sequence diagram illustrating an outline of an example of a data flow according to the second embodiment.

[First Embodiment]
A first embodiment will be described with reference to the drawings. The management system according to the present embodiment is a system that stores and manages construction data including information about various constructions during construction and civil engineering work. In the management system, construction data is distributed and managed by a plurality of nodes connected by a peer-to-peer method. Further, the construction data is saved in a format using a block chain. For these reasons, it is difficult for the management system to falsify construction data. The management system is provided with a mechanism for referring to the stored construction data and confirming that the data at the user's hand has not been tampered with.

<System configuration>
FIG. 1 shows an outline of a configuration example of a management system 1 according to this embodiment. As shown in FIG. 1, the management system 1 includes a management network 110, a site manager personal computer (PC) 120, a site terminal 130, and a confirmer PC 140. The management network 110 stores construction data whose reliability is ensured. The management network 110 is configured by connecting a plurality of servers and the like that function as nodes, for example, in a peer-to-peer network. The site terminal 130 is a terminal used at a construction site. The site terminal 130 collects data relating to the construction at the construction site. The site manager PC 120 organizes data and the like acquired by the site terminal 130 and creates a report based on the data. The site manager PC 120 broadcasts to the management network 110 the data that needs to be recorded among the data acquired by the site terminal 130, the processed data based on the data, the report data, and the like. Each node of the management network 110 stores information based on the data transmitted from the site manager PC 120 according to a predetermined method. The site manager PC 120 also transmits the data to be reported to the confirmer PC 140. The confirmer PC 140 performs a confirmation work regarding construction based on the data acquired from the site manager PC 120. Further, the confirmer PC 140 confirms the authenticity of the data acquired from the on-site manager PC 120 by collating with the record stored in the management network 110.

The management network 110 is a peer-to-peer type network including a plurality of nodes. FIG. 1 schematically shows five nodes, that is, a first node 111, a second node 112, a third node 113, a fourth node 114, and a fifth node 115. This node may have any number. The node may be, for example, a server device. Each node of the management network 110 stores construction data according to a predetermined rule. Each node agrees with each other and stores the same data. That is, the management network 110 is a distributed ledger network. In the present embodiment, the construction data is recorded using the block chain technology. For example, each node acquires the same construction data to be recorded. Each node transmits information of the block including the construction data to be added to the block chain to each other, and confirms the identity. When each node determines that the block that it is trying to add to the blockchain matches the block that another node is trying to add to the blockchain, each node places that same block on the blockchain. to add. In this way, each node keeps holding the same blockchain. The stored data may be appropriately encrypted.

The site manager PC 120 is arranged at, for example, a construction site and is used by the site manager. The site manager PC 120 communicates with the site terminal 130. The site manager PC 120 is also connected to the Internet, for example, and communicates with the management network 110 and the confirmer PC 140. The site manager PC 120 organizes data related to the construction performed at the construction site. The site manager PC 120 transmits the construction data to be recorded to the management network 110. Each node of the management network 110 that receives the construction data stores the construction data in a predetermined method. The management system 1 may be provided with a mechanism for automatically transmitting unprocessed data such as data obtained by measurement to the management network 110 so as not to be processed by the site manager PC 120 or the like. The site manager PC 120 also sends the construction data to the confirmer PC 140.

The construction data transmitted from the on-site manager PC 120 to the management network 110 and the confirmer PC 140 is data such as construction location, construction date and time, construction content, information regarding design, measurement data obtained by various measurements during construction, and construction status. It may be various data such as inspection results and data of reports created based on them.

The site terminal 130 is, for example, a tablet-type information terminal brought to the construction site. The site terminal 130 communicates with the site manager PC 120. The site terminal 130 may be a device that collects information on the construction site, photographs the construction site, records various measurement data measured at the construction site, and inputs the inspected construction status. Further, the site terminal 130 may be a device that is connected to a measurement device related to construction and acquires measurement data. In this case, the field terminal 130 may be a dedicated computer with a limited purpose. The site terminal 130 may be a device that relays data between the measuring device and the site manager PC 120. The site terminal 130 transmits the acquired various data to the site manager PC 120. Although one on-site manager PC 120 and one on-site terminal 130 are illustrated in FIG. 1, a plurality of on-site terminals 130 may be connected to one on-site manager PC 120. Further, one site terminal 130 may be connected to a plurality of site manager PCs 120.

The confirmer PC 140 is a PC used by a confirmer who confirms whether or not the construction data received from the site manager PC 120 is correct. The confirmer PC 140 may perform various processes on the construction data received from the site manager PC 120. The confirmer PC 140 communicates with the management network 110 and the site manager PC 120 via, for example, the Internet. The confirmer PC 140 receives the data regarding the construction from the site manager PC 120. The confirmer PC 140 requests the management network 110 for information regarding construction data for which reliability is ensured, and acquires the information. The confirmer PC 140 determines the authenticity of the data acquired from the site manager PC 120 by comparing the data acquired from the site manager PC 120 with the data acquired from the management network 110. The confirmer PC 140 manages the construction status, inspects the construction result, and performs other various data processing based on the data acquired from the site manager PC 120.

Although one management network 110, one site manager PC 120, one site terminal 130, and one confirmer PC 140 are shown in FIG. 1, any number of these may be provided. For example, when information on a plurality of construction sites or information on a plurality of construction stages is managed using one management network 110, there are a plurality of site manager PCs 120 and confirmer PCs 140 connected to one management network 110. Even when the same construction site is managed using different management networks 110 according to the construction stage, one confirmer PC 140 may connect to a plurality of management networks 110. In this case, different on-site manager PCs 120 are connected to each management network 110.

<Configuration of information processing device>
A server, a PC, a tablet-type information terminal, a dedicated computer, and the like that constitute each of the above-mentioned devices generally have the configuration of an information processing device. FIG. 2 schematically shows a configuration example of such an information processing device 300. The information processing device 300 is connected to each other via a bus line 308, and includes a CPU (Central Processing Unit) 301, a RAM (Random Access Memory) 302, a ROM (Read Only Memory) 303, a storage 304, a communication device 305, and an input device. A display device 307 and a display device 307 are provided.

The CPU 301 performs various signal processing and the like. The RAM 302 functions as the main storage device of the CPU 301. The ROM 303 stores various programs and the like. For the storage 304, for example, a Hard Disk Drive (HDD), Solid State Drive (SSD), or the like is used. Various information such as programs and parameters used in the CPU 301 is recorded in the storage 304. Further, various data is recorded in the storage 304. The information processing device 300 may include an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), and the like.

The above-described program is provided via a communication line such as the Internet or various storage media, and is installed in the information processing device 300. The information processing apparatus 300 functions as a node of the management network 110, a site manager PC 120, a site terminal 130, a confirmer PC 140, or the like according to the installed program. That is, each program is provided to a plurality of information processing devices, and the information processing devices perform their respective functions to form the management system 1.

The communication device 305 is used for communication with other devices. The communication device 305 may use various wired or wireless communication standards, for example. Various recording media such as a semiconductor memory may be used for communication. The input device 306 can be, for example, a keyboard, a mouse, a touch panel, or the like. The display device 307 may be a liquid crystal display, an organic EL display, or the like.

<data structure>
In this embodiment, a block chain as a database is used to record the construction data. FIG. 3 schematically shows an example of the data structure of recorded data using a block chain. The block chain 500 including a series of construction data includes a plurality of blocks. For example, FIG. 3 shows an n−1th block 510, an nth block 520, and an n+1th block 530.

Each block includes a block header and construction data corresponding to a transaction list. The construction data is data to be recorded, which is transmitted from the site manager PC 120. The block header includes at least a hash value of the block header of the immediately preceding block, time information, and Merkle root of construction data.

For example, certain construction data 518 is recorded in the (n-1)th block 510. At this time, the block header 511 of the n−1th block 510 includes the hash value 513 of the block header of the n−2nd block. The block header 511 also includes time information 514 when the data is recorded. The block header 511 also includes a Merkle route 515, which is a hash value for the construction data 518.

Next, when the next construction data 528 is recorded in the nth block 520, the block header 521 includes the hash value 523 of the block header 511 of the n−1th block 510. In addition, as in the case of the (n-1)th block 510, the time information 524 at the time of recording and the Merkle route 525 of the construction data 528 are included in the block header 521. In this way, the n-th block 520 in which the block header 521 and the construction data 528 are paired is recorded.

Similarly, in the case of the (n+1)th block 530, the block header 531 including the hash value 533 of the block header 521 of the nth block 520, the time information 534, and the Merkle route 535 of the construction data 538 is created, and construction is performed. Recorded with data 538.

If the construction data 528 of the nth block 520 is changed, the construction data 528 of the block 520 and the Merkle route 525 will not match. If the Merkle route 525 is changed according to the construction data 528, the hash value 533 of the block header of the immediately preceding block recorded in the next n+1th block 530 matches the hash value of the block header 521 of the nth block 520. Will not do. In this way, the modification of the construction data stored in the block chain 500 can be easily found. Based on this, the authenticity of the construction data stored in the block chain 500 is guaranteed.

Note that, here, each block includes the hash value of the block header of the immediately preceding block, but the present invention is not limited to this. Each block may include, for example, the hash value of the entire immediately preceding block. As described above, each block may include a value calculated based on the data stored in the past and a value that changes when the data stored in the past changes.

<Example of construction data>
The management system 1 according to the present embodiment can manage data of various constructions such as construction and civil engineering. The data managed may also include data relating to pile foundations. Taking the case of a pile foundation as an example, an example of a data structure when the measurement data at the time of pile construction is used as construction data will be described with reference to FIGS. 4A and 4B.

As shown in FIG. 4A, the measurement data may include the following information, for example. A password can be set for each measurement data. The measurement data may include a pile number that identifies the pile, a pile code that indicates a type regarding the design of the pile, and the like. Further, the measurement data may include a construction ID and a construction name for identifying construction. The measurement data may include information such as position information indicating the position of the pile, construction date and time indicating the date and time when the construction was performed, and pile type indicating the type of pile. In addition, the measurement data may include information such as a rotation torque, a current value, an excavation depth, a rotation speed, a pile hole diameter, and a drilling liquid supply amount that can be measured by a pile driver during excavation. The information included in the measurement data may be a part of the above, or may include other information.

FIG. 4A shows a case where one set of construction data is created by one measurement. However, it is not limited to this. As shown in FIG. 4B, one set of construction data may include data obtained by multiple measurements. In this case, as shown in FIG. 4B, data having the same pile code may be set as one set of construction data. The password regarding one set of construction data may be common. Further, the password may be different for each measurement data included in one set of construction data. Instead of the pile code, a set of measurement data having the same other data may be set as one set of construction data, or various data may be set as one set of construction data.

4A and 4B show an example of the measurement data as the construction data, the present invention is not limited to this. Construction data includes construction outline, measurement data, design data, construction status check result data, construction site photo data, construction report data, form data, reports or forms, general contractors, contractors, Alternatively, it may be the data or the like of a confirmation mark or the like of the owner or the like, or a combination thereof.

These data include, for example, information about N values such as depth and N value, information about auger head such as minimum and maximum values of head diameter, excavation depth, excavation speed, auger head used, head diameter, pile diameter, pile circumference. Information on excavation such as fixed liquid supply amount, consolidation liquid supply amount, eccentricity, pile number, pile type, pile length, pile diameter, product name, manufacturing number, joint information such as joint, measured pile hole depth, auger Design values, planned values, measured values, check results, etc. for various information such as support values such as current value, maximum current value, integrated current value, elapsed time, pile erection position, pile head level, etc. There are various data.

The data recorded in one block chain 500 may be all data related to one construction. Further, the construction data may be distributed and recorded in the plurality of block chains 500 according to the type of construction, for example. For example, construction data regarding a pile foundation may be recorded in one block chain 500, and construction data regarding a structure may be recorded in another block chain 500.

Further, for example, even construction data regarding a pile foundation may be distributed and recorded in a plurality of block chains 500. For example, data having the same pile code may be recorded in one block chain 500, and data having another pile code may be recorded in another block chain 500.

<Data flow>
Some examples of the data flow in the management system 1 will be described with reference to the sequence diagrams shown in FIGS. 5A to 5H.

(First example)
The first example will be described with reference to the sequence diagram shown in FIG. 5A. The on-site terminal 130 transmits data regarding construction to the on-site manager PC 120. The site manager PC 120 transmits the construction data based on the acquired data, together with the password, to the management network 110 so as to be recorded in the block chain 500.

The management network 110 stores the construction data in the block chain 500 together with the password. At this time, the management network 110 calculates the Merkle route (hash value A) of the construction data by using the hash function. The Merkle route (hash value A) of this construction data is also stored in the block chain 500. Further, information about the time when the construction data is recorded is also stored in the block chain 500. The management network 110 transmits the address of the added construction data to the site manager PC 120.

The site manager PC 120 also reports the same construction data as the data recorded in the block chain 500 to the confirmer PC 140. At this time, the site manager PC 120 transmits the password corresponding to the construction data recorded in the block chain 500 together with the construction data and the address where the construction data acquired from the management network 110 is recorded to the confirmer PC 140. ..

The confirmer PC 140 transmits the address and the password acquired from the site manager PC 120 to the management network 110, and requests the hash value A of the construction data recorded in the block chain 500. On the other hand, the management network 110 collates the password and, if the combination of the address and the password is correct, sends the hash value A corresponding to the address acquired from the confirmer PC 140 to the confirmer PC 140.

The confirmer PC 140 uses the same function as the hash function used by the management network 110 to calculate the Merkle route (hash value B) of the construction data acquired from the site manager PC 120. The confirmer PC 140 compares the hash value A acquired from the management network 110 with the hash value B based on the construction data acquired from the site manager PC 120, and confirms that they match. If these hash values match, it becomes clear that the construction data acquired from the site manager PC 120 has not been tampered with. In this way, the confirmer PC 140 can confirm the authenticity of the construction data.

(Second example)
The second example will be described with reference to the sequence diagram shown in FIG. 5B. Only points different from the first example will be described. In the first example, the confirmer PC 140 requests the hash value A from the management network 110, and the management network 110 transmits the hash value A to the confirmer PC 140 in response to this request. On the other hand, in the second example, when the construction data is recorded in the block chain 500, the hash value A is transmitted from the management network 110 to the confirmer PC 140.

Therefore, when recording the construction data in the block chain 500, the site manager PC 120 sends the transmission destination of the hash value A to the management network 110 together with the construction data. Based on this destination, the management network 110, when recording the construction data in the block chain 500, transmits the Merkle route (hash value A) of the recorded construction data to the confirmer PC 140. Therefore, the site manager PC 120 need not send the password or address to the confirmer PC 140, and may send only the construction data. The site administrator PC 120 may be configured to specify a password, and the confirmer PC 140 may browse the hash value A by using this password.

As in the first example, the confirmer PC 140 compares the hash value A acquired from the management network 110 with the hash value B based on the construction data acquired from the on-site manager PC 120, and confirms that they match. And confirm the authenticity of the construction data.

(Third example)
The third example will be described with reference to the sequence diagram shown in FIG. 5C. Only points different from the first example will be described. In the first example, the confirmer PC 140 requests the hash value A from the management network 110, but in the third example, the confirmer PC 140 specifies an address in the management network 110 and requests construction data. The management network 110 transmits the construction data designated by the address to the confirmer PC 140 in response to the request from the confirmer PC 140.

As in the first example, the confirmer PC 140 calculates the hash value A, which is the Merkle route of the construction data A acquired from the site manager PC 120, and also the Merkle route of the construction data B acquired from the management network 110. The hash value B is calculated. The confirmer PC 140 compares these two calculated hash values, confirms that they match, and confirms the authenticity of the construction data.

(Fourth example)
The fourth example will be described with reference to the sequence diagram shown in FIG. 5D. Only points different from the third example will be described. In the third example, the confirmer PC 140 requests the construction data B from the management network 110, and the management network 110 transmits the construction data B to the confirmer PC 140 in response to this request. On the other hand, in the fourth example, when the construction data is recorded in the block chain 500, the construction data B is transmitted from the management network 110 to the confirmer PC 140.

Therefore, when recording the construction data in the block chain 500, the site manager PC 120 sends the construction data and the destination of the construction data to the management network 110. Based on this transmission destination, the management network 110, when recording the construction data in the block chain 500, transmits the recorded construction data to the confirmer PC 140. Therefore, the site manager PC 120 need not send the password or address to the confirmer PC 140, and may send only the construction data. The site manager PC 120 may specify a password, and the confirmer PC 140 may browse the construction data B by using this password.

As in the third example, the confirmer PC 140 calculates the hash value A, which is the Merkle route of the construction data A acquired from the site manager PC 120, and also the Merkle route of the construction data B acquired from the management network 110. The hash value B is calculated. The confirmer PC 140 compares these two calculated hash values, confirms that they match, and confirms the authenticity of the construction data.

(Fifth example)
The fifth example will be described with reference to the sequence diagram shown in FIG. 5E. Only points different from the third example will be described. In the third example, the confirmer PC 140 compares the hash value A of the construction data A acquired from the site manager PC 120 with the hash value B of the construction data B acquired from the management network 110. On the other hand, in the fifth example, the confirmer PC 140 compares the construction data A acquired from the site manager PC 120 with the construction data B acquired from the management network 110, and confirms that they match. Check and confirm the authenticity of construction data.

(Sixth example)
The sixth example will be described with reference to the sequence diagram shown in FIG. 5F. Only points different from the fifth example will be described. In the fifth example, the confirmer PC 140 requested the construction data B from the management network 110, but in the sixth example, when the construction data is recorded in the block chain 500, the management network 110 sends the construction data B to the confirmer PC 140. This construction data B is transmitted.

Therefore, when recording the construction data in the block chain 500, the site manager PC 120 sends the construction data and the destination of the construction data to the management network 110. Based on this transmission destination, the management network 110, when recording the construction data in the block chain 500, transmits the recorded construction data to the confirmer PC 140. The confirmer PC 140 compares the construction data A acquired from the site manager PC 120 with the construction data B acquired from the management network 110, confirms that they match, and confirms the authenticity of the construction data. ..

(Seventh example)
The seventh example will be described with reference to the sequence diagram shown in FIG. 5G. Only points different from the first example will be described. In the first example, the site manager PC 120 transmits the construction data to the management network 110, and the construction data is recorded in the block chain 500. On the other hand, in the seventh example, the site manager PC 120 transmits the hash value of the construction data to the management network 110, and the hash value is recorded in the block chain 500.

Therefore, the site manager PC 120 calculates the hash value A that is the Merkle route of the construction data using the hash function. The site manager PC 120 transmits the hash value A together with the password to the management network 110 so as to be recorded in the block chain 500. The management network 110 stores the hash value A in the block chain 500 together with the password. The management network 110 transmits the address of the added hash value A to the site manager PC 120.

The site manager PC 120 reports the construction data corresponding to the hash value recorded in the block chain 500 to the confirmer PC 140. At this time, the site manager PC 120 transmits the password recorded in the block chain 500 together with the construction data and the address acquired from the management network 110 to the confirmer PC 140.

The confirmer PC 140 transmits the address and the password acquired from the site manager PC 120 to the management network 110, and requests the hash value A recorded in the block chain 500. On the other hand, the management network 110 collates the passwords, and when the correspondence between the address and the password can be confirmed, the hash value A corresponding to the address acquired from the confirmer PC 140 is transmitted to the confirmer PC 140.

The confirmer PC 140 uses the same function as the hash function used by the management network 110 to calculate the Merkle route (hash value B) of the construction data acquired from the site manager PC 120. The confirmer PC 140 compares the hash value A acquired from the management network 110 with the hash value B based on the construction data acquired from the site administrator PC 120, confirms that they match, and verifies the construction data authenticity. Check the sex.

(Eighth example)
The eighth example will be described with reference to the sequence diagram shown in FIG. 5H. Only points different from the seventh example will be described. In the seventh example, the confirmer PC 140 requests the hash value A from the management network 110, but in the eighth example, when the hash value A is recorded in the block chain 500, the confirmer PC 140 is sent from the management network 110. The hash value A is transmitted to.

Therefore, when recording the construction data in the block chain 500, the on-site manager PC 120 sends the hash value A and the destination of the hash value A to the management network 110. Based on this transmission destination, when the management network 110 records the hash value A in the block chain 500, it transmits the recorded hash value A to the confirmer PC 140. As in the seventh example, the confirmer PC 140 compares the hash value A acquired from the management network 110 with the hash value B based on the construction data acquired from the on-site manager PC 120, and confirms that they match. And confirm the authenticity of the construction data.

(About other data in each example)
The above-mentioned transmitted/received data is a part of the data transmitted/received in the management system 1. The management system 1 also transmits and receives other data. For example, in order to transmit and receive data between the site manager PC 120 and the confirmer PC 140, mutual information and various arrangements regarding data to be transmitted and received are also transmitted and received.

For example, the site manager PC 120 may request the confirmer PC 140 to perform registration for each work place, and the confirmer PC 140 may perform work registration work. The confirmer PC 140 may determine the ID for each work place and transmit the decided work place ID to the site manager PC 120. At this time, the work place ID may be transmitted as a numerical value or may be transmitted as an image such as a two-dimensional code. This work place ID may be used as an ID or the like necessary for the on-site manager PC 120 to access the management network 110. Further, the site manager PC 120 may add information regarding the corresponding work place ID when transmitting data to the confirmer PC 140. This work place ID may be used like a password. The data may be configured so that the confirmer PC 140 can browse the data acquired from the site manager PC 120 by inputting this work place ID.

<Combination of data to be compared>
As described with reference to FIGS. 5A to 5H, the data transmitted from the site manager PC 120 to the confirmer PC 140 is necessary construction data. On the other hand, the data transmitted from the on-site manager PC 120 to the management network 110, the data recorded on the block chain 500 of the management network 110, the data transmitted from the management network 110 to the confirmer PC 140, and the authenticity of the data on the confirmer PC 140. The data and the like used for the determination of can be various. For example, construction data, its hash value, etc., or various combinations thereof may be used. A list of the examples is shown in FIG.

An example shown in (1) of FIG. 6 corresponding to the above-mentioned first example and second example will be described. Construction data is transmitted from the site manager PC 120 to the management network 110. This construction data is recorded in the block chain 500 of the management network 110. Further, the hash value of the construction data is also recorded in the block chain 500. The recorded hash value is transmitted from the management network 110 to the confirmer PC 140. The confirmer PC 140 calculates the hash value of the construction data acquired from the site manager PC 120 and compares the hash value with the hash value acquired from the management network 110 to confirm the authenticity of the construction data acquired from the site manager PC 120.

According to this method, construction data for which an agreement has been formed is recorded in the management network 110. Therefore, genuine construction data is stored in the management network 110. Further, the data transmitted from the management network 110 to the confirmer PC 140 is a hash value, the amount of data is small, and the handling is easy. Further, since the comparison process by the confirmer PC 140 is also performed between the hash values, the load of the comparison process is small.

An example shown in (2) of FIG. 6 corresponding to the above-mentioned third example and fourth example will be described. Construction data is transmitted from the site manager PC 120 to the management network 110. This construction data is recorded in the block chain 500 of the management network 110. The recorded construction data is transmitted from the management network 110 to the confirmer PC 140. The confirmer PC 140 calculates a hash value of the construction data acquired from the site manager PC 120 and a hash value of the construction data acquired from the management network 110, compares the hash values, and acquires the hash value from the site manager PC 120. Check the authenticity of construction data.

According to this method, construction data for which an agreement has been formed is recorded in the management network 110. Therefore, genuine construction data is stored in the management network 110. Further, since the comparison process by the confirmer PC 140 is performed between the hash values, the load of the comparison process is small. Further, even if the construction data acquired from the site manager PC 120 is falsified, the confirmer PC 140 can acquire the genuine construction data from the management network 110.

An example shown in (3) of FIG. 6 corresponding to the above fifth example and sixth example will be described. Construction data is transmitted from the site manager PC 120 to the management network 110. This construction data is recorded in the block chain 500 of the management network 110. The recorded construction data is transmitted from the management network 110 to the confirmer PC 140. The confirmer PC 140 compares the construction data acquired from the site manager PC 120 with the construction data acquired from the management network 110, and confirms the authenticity of the construction data acquired from the site manager PC 120.

According to this method, construction data for which an agreement has been formed is recorded in the management network 110. Therefore, genuine construction data is stored in the management network 110. Further, even if the construction data acquired from the site manager PC 120 is falsified, the confirmer PC 140 can acquire the genuine construction data from the management network 110.

If the number of data is small, the collation can be easily performed by such a method. Further, when the hash value is used for comparing the data, not only the contents of the data but also the matching of the data formats are compared. Therefore, it is necessary to accurately unify the data formats. On the other hand, when the construction data are compared with each other, the data can be compared even if the data formats are slightly different.

The example shown in (4) of FIG. 6 will be described. Construction data is transmitted from the site manager PC 120 to the management network 110. The hash value of this construction data is recorded in the block chain 500 of the management network 110. The recorded hash value is transmitted from the management network 110 to the confirmer PC 140. The confirmer PC 140 calculates the hash value of the construction data acquired from the site manager PC 120 and compares the hash value with the hash value acquired from the management network 110 to confirm the authenticity of the construction data acquired from the site manager PC 120.

According to this method, the data stored in the management network 110 is a hash value, and the amount of stored data is small. Further, the data transmitted from the management network 110 to the confirmer PC 140 is a hash value, the amount of data is small, and the handling is easy. Further, since the comparison process by the confirmer PC 140 is also performed between the hash values, the load of the comparison process is small.

An example shown in (5) of FIG. 6 corresponding to the above-mentioned seventh example and eighth example will be described. The hash value of the construction data is transmitted from the site manager PC 120 to the management network 110. The hash value of this construction data is recorded in the block chain 500 of the management network 110. The recorded hash value is transmitted from the management network 110 to the confirmer PC 140. The confirmer PC 140 calculates the hash value of the construction data acquired from the site manager PC 120 and compares the hash value with the hash value acquired from the management network 110 to confirm the authenticity of the construction data acquired from the site manager PC 120.

According to this method, since the hash value of the construction data is transmitted to the management network 110, the nodes configuring the management network 110 do not touch the construction data. Therefore, the construction data is kept secret from the nodes that form the management network 110. Also, the data stored in the management network 110 is a hash value, and the amount of data stored is small. Further, the data transmitted from the management network 110 to the confirmer PC 140 is a hash value, the amount of data is small, and the handling is easy. Further, since the comparison process by the confirmer PC 140 is also performed between the hash values, the load of the comparison process is small.

<System operation>
The outline of the operation of each unit of the management system 1 will be described.

(Operation of the site administrator PC)
An outline of the operation of the site administrator PC 120 when recording one piece of construction data in the management network 110 will be described with reference to the flowchart shown in FIG. 7.

In step S101, the on-site manager PC 120 acquires data regarding construction from the on-site terminal 130, for example.

In step S102, the site manager PC 120 creates stored data to be recorded in the block chain 500 based on the acquired data regarding construction. For example, in the first to sixth examples described with reference to FIGS. 5A to 5F, the stored data is construction data. Further, for example, in the seventh example and the eighth example described with reference to FIGS. 5G and 5H, the stored data is a hash value related to the construction data.

In step S 103, the site manager PC 120 broadcasts the stored data to the management network 110. The management network 110 records the data transmitted from the site manager PC 120 in the block chain 500 as construction data and the like. The management network 110 transmits, to the on-site manager PC 120, address information that specifies the construction data and the like transmitted from the on-site manager PC 120 and recorded on the block chain 500.

In step S104, the on-site manager PC 120 receives the transmitted address information specifying the construction data from the management network 110, and saves the received information.

In step S105, the on-site manager PC 120 transmits to the confirmer PC 140 the stored data which is the construction data transmitted to the management network 110 and stored in the management network, and the address information acquired from the management network 110. When the stored data is a hash value, the construction data that is the source of the stored data is transmitted instead of the stored data itself.

(Node behavior)
The outline of the operation of the nodes included in the management network 110 will be described. The management network 110 includes a plurality of nodes. The process described here is executed by each node.

First, the case of the first, third, fifth, and seventh examples described with reference to FIGS. 5A, 5C, 5E, and 5G will be described with reference to the flowchart shown in FIG. 8A.

In step S201, the node determines whether or not the storage data is received from the site manager PC 120. If it is determined that the saved data is received, the process proceeds to step S202. In step S202, the node acquires the stored data from the site manager PC 120.

If the acquired saved data is construction data as in the case of the first to sixth examples described with reference to FIGS. 5A to 5F, in step S203, the node is the Merkle route of construction data. Calculate a hash value.

In step S204, the node creates a block to add to the blockchain 500. The block includes a block header and construction data. Here, the block header includes the hash value of the block header of the immediately preceding block, time information, the Merkle route calculated in step S203, and the like.

In step S205, the node performs consensus processing. That is, the plurality of nodes form an agreement regarding blocks to be added to the block chain 500. For example, each node sends information about the created block to other nodes. Each node obtains information about blocks sent by other nodes and compares them with the blocks it created. If the block created by itself and the block created by another node match, the node transmits information to the other node that the block is correct. When each node performs processing according to a predetermined procedure, the blocks created by each node match each other, and the facts are mutually confirmed. In such cases, it is said that the agreement has been formed.

For example, in the case of the block chain 500 having the structure as shown in FIG. 3, since the Merkle route of the construction data is included in the block header, if only the contents of the block header are collated, the data of the block will match. Can be confirmed. In addition, the hash value of the block header may be recorded in the block header, and the matching of the data of the block may be confirmed by collating the hash value.

Further, the management network 110 can be configured such that an agreement is formed even if the data created by all the nodes configuring the management network 110 do not match. For example, when the data created by more than a predetermined number of nodes match, the data is transmitted to each node constituting the management network 110 together with the fact that the agreement has been formed. All nodes record the data. In this way, the management network 110 may be configured.

In step S206, the node determines whether an agreement has been formed. When the agreement is formed, the process proceeds to step S207.

In step S207, the node adds the created block data to the block chain 500 and saves it.

In step S208, the node transmits address information that identifies the added block to the site manager PC 120 that transmitted the saved data. With the above, a series of processes for recording the received construction data ends, and the process returns to step S201.

When it is determined in step S206 that the consensus is not formed, the process proceeds to step S209. In step S209, the node transmits to the site manager PC 120 error information indicating that the agreement could not be formed and the received stored data could not be recorded in the block chain 500.

When it is determined in step S201 that stored data has not been received, the process proceeds to step S210. In step S210, the node determines whether a data request has been received from the confirmer PC 140. For example, when the confirmer PC 140 determines whether the construction data acquired from the site manager PC 120 is authentic, the confirmer PC 140 transmits the address and password acquired from the site manager PC 120 to the management network 110. In this way, when the address and password are received from the confirmer PC 140, the node determines that the data request has been received. When the data request has not been received, the process returns to step S201. When the data request is received, the process proceeds to step S211.

In step S211, the node collates the address information included in the received data request with the password recorded in the address. When the passwords match, the node reads the requested data from the blockchain 500. In step S212, the node transmits the read requested data to the confirmer PC 140 that requested the data. Then, the process returns to step S201.

Next, the case of the second, fourth, sixth and eighth examples described with reference to FIGS. 5B, 5D, 5F and 5H will be described with reference to the flowchart shown in FIG. 8B. Differences from the case shown in FIG. 8A will be described.

When it is determined in step S201 that the stored data is not received, the process repeats step S201 and waits. If it is determined in step S201 that the storage data has been received, the process proceeds to step S202. Steps S202 to S208 are the same as the above case. Briefly, the node acquires the stored data in step S202, calculates a hash value in step S203, and creates a block in step S204.

The node performs the consensus process in step S205, and when it is determined that the consensus is formed in step S206, the process adds and saves the block data to the block chain 500 in step S207, and in step S208, the site manager PC 120. Send the address of the data added to. Then, in step S220, the node transmits confirmation data to the confirmer PC 140. The confirmation data may be a hash value that is the Merkle route of the construction data or the construction data itself. Then, the process returns to step S201. When it is determined in step S206 that the consensus is not formed, an error is transmitted to the site manager PC 120 in step S209, and the process returns to step S201.

(Operation of confirmer PC)
The outline of the operation of the confirmer PC 140 will be described. First, the case of the first, third, fifth and seventh examples described with reference to FIGS. 5A, 5C, 5E and 5G will be described with reference to the flowchart shown in FIG. 9A.

In step S301, the confirmer PC 140 determines whether or not construction data or the like has been received from the site manager PC 120. When the construction data is received, the process proceeds to step S302. In step S302, the confirmer PC 140 acquires construction data, an address, and the like from the site manager PC 120. In step S303, the confirmer PC 140 records the acquired construction data, address, and the like. After that, the process returns to step S301.

When it is determined in step S301 that the construction data has not been received, the process proceeds to step S304. In step S304, the confirmer PC 140 determines whether to confirm the data, that is, whether the user inputs a data confirmation instruction. If it is determined not to confirm the data, the process returns to step S301. On the other hand, if it is determined to confirm the data, the process proceeds to step S305.

In step S<b>305, the confirmer PC 140 transmits the address regarding the data to be confirmed to the management network 110 and requests the management network 110 for the data. This request may be transmitted to at least one of the nodes that configure the management network 110. In response to this request, data is transmitted from the management network 110 to the confirmer PC 140 by the processing in step S212 described above. In step S306, the confirmer PC 140 receives the requested data from the management network 110. This data is, for example, a hash value of construction data or the construction data itself.

In step S307, the confirmer PC 140 calculates the hash value of the construction data acquired from the site manager PC 120 or the management network 110. In step S308, the confirmer PC 140 compares the construction data acquired from the site manager PC 120 or the hash value thereof with the construction data acquired from the management network 110 or the hash value thereof, and determines whether they match. In step S309, the confirmer PC 140 outputs the comparison result. For example, when the values match, it can be determined that the construction data acquired from the site manager PC 120 is the correct data recorded in the block chain 500.

Next, the case of the second, fourth, sixth and eighth examples described with reference to FIGS. 5B, 5D, 5F and 5H will be described with reference to the flowchart shown in FIG. 9B. Differences from the case shown in FIG. 9A will be described.

In step S301, the confirmer PC 140 determines whether or not construction data or the like has been received from the site manager PC 120, and when it is determined that construction data has been received, the process proceeds to step S302. The confirmer PC 140 acquires the construction data and the like from the site manager PC 120 in step S302, and records the acquired construction data and the like in step S303. After that, the process returns to step S301.

When it is determined in step S301 that the construction data has not been received, the confirmer PC 140 determines in step S304 whether or not to confirm the data. When it is determined that the data is not confirmed, the process proceeds to step S310. In step S310, the confirmer PC 140 determines whether the confirmation data regarding the data added to the block chain 500 transmitted from the management network 110 in step S220 described above has been received. If it is determined that it has not been received, the process returns to step S301. On the other hand, if it is determined that the signal is received, the process proceeds to step S311. The confirmer PC 140 acquires the confirmation data from the management network 110 in step S311, and records the acquired confirmation data in step S312. After that, the process returns to step S301.

When it is determined in step S304 that the data is to be confirmed, the process proceeds to step S307. In step S307, the confirmer PC 140 calculates the hash value of the construction data acquired from the site manager PC 120 or the management network 110. In step S308, the confirmer PC 140 compares the construction data or the hash value thereof acquired from the site administrator PC 120 with the construction data or the hash value thereof acquired from the management network 110, and determines whether they match, and in step S309. At, the result of the comparison is output.

<Node configuration>
The plurality of nodes forming the management network 110 form an agreement when the block chain 500 is generated. This agreement makes it difficult to falsify the construction data recorded in the blockchain 500. Therefore, in the present embodiment, the provider of the node is selected so that the tampering is difficult. For example, if the contractor provides all the nodes, the contractor can freely rewrite the block chain 500, and thus such sharing of nodes is not appropriate. 7 illustrates some aspects of a combination of node providers.

As a first example, one general contractor involved in one construction work and a plurality of contractors in different fields may each provide a node. For example, general contractors, pile construction contractors, bar arrangement contractors, structural contractors, exterior contractors, interior contractors, and the like provide nodes. In this way, since other companies in the same industry are not involved, there is no mutual interest and the objectivity of consensus building is further enhanced.

Further, the general contractor provides the node, so that the general contractor stores the construction data in its own server. Here, if all construction data relating to one construction is stored in this management network 110, the general contractor will store all construction data relating to the construction in its own server. As a result, for example, the general contractor can easily hand over necessary data to the orderer.

As a second example, one general contractor and multiple subcontractors in one area of the general contractor may each provide a node. For example, each contractor, such as a general contractor and a plurality of pile construction contractors who subcontract the general contractor, provides nodes. In this way, by gathering contractors in one field, it is convenient for general contractors to have construction data related to the field in one place. Further, the general contractor provides the node, so that the general contractor stores the construction data in its own server. As a result, for example, the general contractor can easily hand over necessary data to the orderer. In this case, in order to avoid that other companies in the same industry share raw construction data with each other, the data provided to the management network 110 is not the construction data itself as in the example shown in (5) of FIG. , May be a hash value of construction data.

As a third example, a plurality of general contractors and a plurality of subcontractors in one field of the general contractor may each provide a node. For example, a plurality of general contractors and a plurality of pile construction contractors subcontracting the plurality of general contractors provide nodes. It is convenient to collect construction data related to the relevant field in one place when multiple general contractors undertake one large-scale construction. Other than that, the same thing as the second example can be said.

As a fourth example, when one large-scale work is contracted by a plurality of general contractors, a plurality of general contractors involved in a single work and a plurality of contractors in different fields may provide nodes. It is convenient that many construction data for one large-scale construction work are collected in one place. Other than that, the same thing as the third example can be said.

As a fifth example, one subcontractor and a plurality of general contractors that are subcontractors of the subcontractor may each provide a node. It is convenient that the construction data of the subcontractor is collected in one place.

<About management system>
According to this embodiment, the information related to the construction data is stored in the block chain 500 formed by the agreement of the plurality of nodes provided by the plurality of companies forming the management network 110. The block chain 500 for which this agreement has been formed is distributed and stored in each node. For this reason, it is difficult to falsify the construction data, and falsification of the construction data is prevented.

In addition, since the block chain is used and the hash value of the block header is used to form the agreement, when the new construction data is recorded, the authenticity of the past data is also confirmed. Therefore, the authenticity of all construction data including past data can be easily maintained. By providing a node that constitutes the management network 110, the confirmer can easily obtain the construction data whose authenticity is guaranteed.

Further, the confirmer PC 140 compares the construction data or the hash value thereof acquired from the site administrator PC 120 with the construction data or the hash value thereof acquired from the management network 110, thereby facilitating the presence or absence of tampering of the construction data. You can check.

According to this embodiment, the cost for the certification body is reduced because there is no intervening external certification body or the like. In addition, the data is stored in a server prepared by a person involved in the construction. Therefore, it is not necessary to prepare a third party server or the like for storing the data, and the cost for preparing the third party server or the like is also reduced.

[Modification of First Embodiment]
<Data recorded on the blockchain>
The above-described embodiment is an example in which the data recorded in the block chain 500 is transmitted from the site manager PC 120 to the management network 110. However, it is not limited to this. The data recorded in the block chain 500 may be data transmitted from the site terminal 130, data transmitted from the site manager PC 120, data transmitted from the confirmer PC 140, or a combination thereof.

An example of data recorded in the block chain 500 will be described with reference to FIG. In FIG. 10, the on-site terminal is shown as an example of the case of a measuring device that performs measurement related to construction, and the case where the data output from the on-site terminal is the measurement data is shown. However, the present invention is not limited to this, and the site terminal may output various construction data as in the above-described embodiment. Part or all of the data shown in FIG. 10 or other data may be recorded in the block chain.

The measurement data output from the field terminal may be recorded in the block chain.
The measurement data output from the site terminal may be transmitted to the site manager PC, and the measurement data output by the site manager PC may be recorded in the block chain.
The site manager PC may create a form using the measurement data acquired from the site terminal, and the created form may be recorded in the block chain.
The form created by the site manager PC may be transmitted to the confirmer PC, and the data of the form approved by the confirmer PC may be recorded in the block chain.
The form created by the site manager PC may be transmitted to the confirmer PC, and the confirmation person PC may transmit the fact that the form is approved by the confirmer PC to the site manager PC. In this case, the data of the approved form output from the confirmer PC may be recorded in the block chain. Alternatively, the approved form data created by the site manager PC that has received the approval from the confirmer PC may be output from the site manager PC and the approved form data may be recorded in the block chain.

<About the structure of data recorded by the management network>
In the above embodiment, the block chain is used as the data structure for storing the construction data. In this block chain, blocks containing construction data are linked to each other through hash values. However, the data structure is not limited to the block chain. If the management network 110 has the same data as each other, it is difficult to falsify all data, and falsification is prevented. Therefore, a data structure other than the block chain may be used as long as the nodes can confirm that their data has not been tampered with.

<Other>
In the above-described embodiment, the confirmer PC 140 acquires the construction data from the site manager PC 120 and receives the data of which the authenticity is guaranteed from the management network 110. The confirmer PC 140 confirms the authenticity of the data acquired from the site manager PC 120 by comparing the data based on the data acquired from the site manager PC 120 with the data based on the data acquired from the manager PC 120. ing. However, it is not limited to this. When the data required by the confirmer PC 140 can be acquired from the management network 110, the confirmer PC 140 acquires the construction data as the data whose authenticity is guaranteed, not from the site manager PC 120. You may.

Further, in the above-described embodiment, in the consensus building in the management network 110, an example is described in which the data is matched, but the present invention is not limited to this. For example, the block chain 500 and the management network 110 may be configured such that each block includes a nonce and a consensus is formed by a proof of work by a minor. In this case, it is preferable that the miner is provided with some kind of reward. The increased difficulty of adding blocks further increases the difficulty of tampering and increases the certainty that the stored data is authentic.

[Second Embodiment]
The second embodiment will be described. Here, the difference from the first embodiment will be described, and the same portions will be denoted by the same reference numerals and the description thereof will be omitted. FIG. 11 shows an outline of a configuration example of the management system 1 according to this embodiment. As shown in this figure, in the present embodiment, the management system 1 has a construction management server 150 that relays various data regarding construction and performs necessary processing on various data. In the present embodiment, the construction management server 150 is connected to the management network 110, and the site manager PC 120 and the confirmer PC 140 are connected to the construction management server 150.

In the present embodiment, the site manager PC 120 requests the confirmer PC 140 to authenticate the construction data, and the confirmer PC 140 can authenticate, correct or send back the construction data in response to the authentication request. The data flow according to this embodiment will be described with reference to the sequence diagrams shown in FIGS. 12A to 12C.

As shown in FIG. 12A, when the site terminal 130 is acquiring the measurement data, the measurement data is periodically transmitted to the site manager PC 120. The site manager PC 120 transmits the received measurement data to the construction management server 150. The transmission of the measurement data is performed in real time, or periodically such as every 3 minutes, every 10 minutes, or every 60 minutes. When sent in real time, no modification of the measurement data is done. If the transmission interval is relatively long, for example, every 60 minutes, the measurement data can be corrected and edited by the site manager PC 120. When transmitting the measurement data, an ID for specifying the data or a password for protecting the data may be added.

Upon receiving the measurement data from the site manager PC 120, the construction management server 150 regularly creates various documents such as forms and reports every 3 minutes, every 10 minutes, every 60 minutes. The site manager PC 120 transmits the received measurement data and the created forms, reports, documents, etc. to the management network 110 in order to store them in the block chain 500. As in the case of the first embodiment, the management network 110 stores various data transmitted from the construction management server 150 in the block chain 500 using block chain technology while obtaining consensus by a plurality of nodes.

As shown in FIG. 12B, when it is necessary for the confirmer PC 140 to confirm the data, the site manager PC 120 transmits the ID and password for the application software (app) operating on the confirmer PC 140 to the confirmer PC 140. .. Such an ID and password can control the authority of the confirmer PC 140 to access the data output by the site manager PC 120.

The confirmer PC 140 activates the application and inputs the ID and password acquired from the site manager PC 120 into the application. The app of the confirmer PC 140 transmits the input ID and password to the construction management server 150. The construction management server 150 transmits data corresponding to the received ID and password, that is, data such as forms, reports, and documents associated with the ID and password acquired from the site manager PC 120 to the confirmer PC 140. The confirmer PC 140 displays these documents and the like based on the received data such as forms, reports and documents. When the construction management server 150 newly creates these forms, documents, etc., the data is transmitted from the construction management server 150 to the confirmer PC 140, and the confirmer PC 140 updates the display.

As shown in FIG. 12C, the measurement data is transmitted from the site terminal 130 to the site manager PC 120, and the site manager PC 120 transmits a signal requesting authentication by the confirmer PC 140 to the construction management server 150 together with the measurement data. To do. For example, in the case of pile construction, this certification request can be made at the time of completion of excavation, completion of the root consolidation portion, completion of the pile circumference fixing portion, and the like.

For example, when the excavation is completed, measurement data such as an integrated current value at the time of excavation, a diagram such as a graph showing the data, a display of an excavation completion mark, and an authentication request are transmitted. For example, at the completion of the work of the rooting part, the measurement data of the rooting part such as the injection amount of concrete milk, the captured image of the measurement result display by the measuring device, the display of the rooting part completion mark, and the authentication request are transmitted. It For example, when the work around the pile fixing part is completed, the measurement data of the consolidation part such as the injection amount of concrete milk, the captured image of the measurement result display by the measuring device, the display of the completion mark of the pile fixing part, and the authentication request are displayed. Sent.

The construction management server 150 transmits such information to the management network 110 so that the forms, reports, documents, etc. created at the time of receiving the authentication request are stored in the block chain 500 together with the authentication request information. The management network 110 that has acquired these pieces of information stores the information in the block chain 500. In this way, data that may be modified is saved, and the history of the modified data is also saved.

Further, the construction management server 150 transmits a notification that there is an authentication request and information regarding the authentication request to the confirmer PC 140.

Upon receiving the authentication request, the confirmer PC 140 sends a message to that effect to the construction management server 150 when authenticating the information such as the measurement data. The authentication may be performed based on the integrated current value when the excavation is completed, based on the captured image when the root consolidation part is completed, and may be performed based on the captured image when the pile circumference fixing part is completed. ..

The construction management server 150, which has received the information to authenticate from the confirmer PC 140, stores the information such as the authenticated measurement data, forms, documents, etc. in the management network 110 so as to store the information in the block chain 500 together with the authentication information. Send. The management network 110 that has received the information stores the information including the authentication information in the block chain 500.

The confirmer PC 140 that has received the authentication request, when denying and correcting the information such as the measurement data, corrects the data and transmits the correction data to the construction management server 150. For example, if the authentication request information includes a transcription error, the correction data is created by correcting the mistake. The construction management server 150, which has received this correction data, transmits a correction notification indicating that the correction has been received and a request to confirm the correction content to the site manager PC 120.

Upon receiving the confirmation request, the site manager PC 120 transmits the corrected measurement data and the like to the construction management server again together with the authentication request when there is no problem in the correction. After that, similarly to the above-described processing, the corrected data is sent from the construction management server 150 to the management network 110, is stored in the block chain, and is sent the confirmation request notification and the authentication request information to the confirmer PC 140. If authentication is performed by the confirmer PC 140, various data is stored in the block chain 500 together with the authentication information, and if not authenticated, corrections are repeated again.

Upon receipt of the confirmation request, the site manager PC 120 corrects the measurement data by itself when there is a problem with the correction, and sends the corrected measurement data and the like to the construction management server again together with the authentication request. After that, similarly to the above-described processing, the corrected data is sent from the construction management server 150 to the management network 110, is stored in the block chain, and is sent the confirmation request notification and the authentication request information to the confirmer PC 140. If authentication is performed by the confirmer PC 140, various data is stored in the block chain 500 together with the authentication information, and if not authenticated, corrections are repeated again.

Upon receiving the authentication request, the confirmer PC 140, when sending back the measurement data and the like to the site manager PC 120, sends a message to that effect to the construction management server 150. The construction management server 150 notifies the site manager PC 120 of the return.

According to the present embodiment, the data by the site manager PC 120 is confirmed by the confirmer PC 140 and is stored in the block chain 500 together with the information indicating that it has been authenticated. Also, if there is a transcription error, etc., the mistake is properly corrected. For example, in the construction related to piles and the like, manual transcription and input of inspection results are performed, and simple errors may occur in these works. Such an error is preferably corrected appropriately and the corrected data is preferably saved. According to this embodiment, appropriate correction is performed and the corrected data is saved. Further, in this embodiment, information such as the history of correction is shared by all nodes. The monitoring function of each node prevents, for example, improper changes to measured data that should not be corrected.

The confirmer PC 140 who can make a correction is, for example, a general contractor manager, and the design manager and the owner may only make approval without making corrections. Such a difference in authority can be managed by the ID, for example.

The second embodiment can be combined with various items described as the first embodiment and its modifications.

The inventions described in the claims at the time of filing the original application will be additionally described below.
[1]
A management network in which multiple nodes are connected to each other,
A first terminal for transmitting first data regarding construction data to each of the plurality of nodes;
A second terminal that performs a confirmation process regarding the construction data,
Each of the plurality of nodes is
Save the second data based on the first data when the agreement of the plurality of nodes is formed with respect to the first data transmitted from the first terminal,
Transmitting third data related to the second data to the second terminal,
Construction data management system.
[2]
The node stores, as the second data, data including a value calculated based on the second data stored in the past, when storing the new second data, [1] Management system.
[3]
The first terminal transmits the construction data to the second terminal,
The second terminal compares the data based on the construction data acquired from the first terminal with the data based on the third data acquired from the management network to verify the authenticity of the construction data. Check,
The management system according to [1] or [2].
[4]
Multiple people involved in one construction are providing the node,
Construction data related to the one construction is stored in the node,
The management system according to any one of [1] to [3].
[5]
The management system according to any one of [1] to [4], wherein one person provides the node for each construction field, and a plurality of persons in a plurality of construction fields provide the plurality of nodes.
[6]
The management system according to [4] or [5], wherein the first data includes at least a part of the construction data.
[7]
The management system according to any one of [1] to [4], wherein a plurality of persons in the same construction field provide the nodes so that the plurality of persons provide the plurality of nodes.
[8]
The management system according to [7], wherein the first data is a hash value of the construction data.
[9]
Any one of [1] to [8], wherein each of the nodes determines that an agreement has been formed when it is determined that the second data stored in more than a predetermined number of the plurality of nodes match. The management system according to item 1.
[10]
The third data is a hash value of data including at least a part of the construction data, or includes at least a part of the construction data, [1] to [9]. Management system.
[11]
Receiving the first data from the first terminal and transmitting data related to the first data to the node,
Receiving a request for the third data from the second terminal and transmitting the request for the third data to the node,
Any one of [1] to [9], further comprising a construction management server configured to receive the third data from the node and transmit the third data to the second terminal. Management system described in paragraph.
[12]
The management system according to [11], wherein the construction management server creates a report or form based on the first data, and transmits the report or form to the node.
[13]
The construction data is data relating to a pile foundation, and includes data measured using a pile driver or data of an inspection result of construction, according to any one of [1] to [12]. Management system.
[14]
Providing a first program for causing the first terminal to transmit the first data regarding the construction data to each of the plurality of nodes, and
In the node,
With respect to the first data transmitted from the first terminal, when agreement of a plurality of the nodes is formed, the second data based on the first data is stored in the node,
Providing a second program for transmitting the third data included in the second data to the second terminal;
Providing a third program for causing the second terminal to perform a confirmation process regarding the construction data using the third data, and manufacturing a construction data management system.

1... Management system, 110... Management network, 111... First node, 112... Second node, 113... Third node, 114... Fourth node, 115... Fifth node, 120... Site manager PC, 130... Site terminal, 140... Confirmer PC, 150... Construction management server, 300... Information processing device, 301... CPU, 302... RAM, 303... ROM, 304... Storage, 305... Communication device, 306... Input device , 307... Display device, 308... Bus line, 500... Block chain, 510, 520, 530... Block, 511, 521, 531... Block header, 513, 523, 533... Hash value, 514, 524, 534... Time information , 515, 525, 535... Merkle route, 518, 528, 538... Construction data.

Claims (17)

A management network in which multiple nodes are connected to each other,
A first terminal for transmitting first data regarding construction data to each of the plurality of nodes;
With a second terminal,
Each of the plurality of nodes is
Save the second data based on the first data when the agreement of the plurality of nodes is formed with respect to the first data transmitted from the first terminal,
Transmitting third data related to the second data to the second terminal,
The first terminal transmits data related to the construction data to the second terminal,
The second terminal confirms the authenticity of the data regarding the construction data acquired from the first terminal based on the third data,
Construction data management system. A management network in which multiple nodes are connected to each other,
A first terminal that transmits first data, which is a hash value of data related to construction data, to each of the plurality of nodes;
With a second terminal,
Each of the plurality of nodes is
Regarding the first data transmitted from the first terminal, when the agreement of the plurality of nodes is formed, second data based on the first data and having the hash value as a part Save and
Transmitting third data related to the second data and partially having the hash value to the second terminal;
The second terminal confirms the authenticity of the data regarding the construction data based on the third data,
Construction data management system. A management network in which multiple nodes are connected to each other,
A first terminal for transmitting first data regarding construction data to each of the plurality of nodes;
With a second terminal,
Each of the plurality of nodes is
Save the second data based on the first data when the agreement of the plurality of nodes is formed with respect to the first data transmitted from the first terminal,
Transmitting third data, which is a hash value of data including a part of the construction data and related to the second data, to the second terminal,
The second terminal confirms the authenticity of the data regarding the construction data based on the third data,
Construction data management system. A management network in which multiple nodes are connected to each other,
A first terminal for transmitting first data regarding construction data to each of the plurality of nodes;
With a second terminal,
Each of the plurality of nodes is
Save the second data based on the first data when the agreement of the plurality of nodes is formed with respect to the first data transmitted from the first terminal,
Transmitting third data, which is a part of the construction data, related to the second data, to the second terminal,
The second terminal confirms the authenticity of the data regarding the construction data based on the third data,
Construction data management system. A management network in which multiple nodes are connected to each other,
A first terminal,
A second terminal,
With a construction management server,
The first terminal transmits first data regarding construction data to the construction management server,
The construction management server receives the first data from the first terminal and transmits the first data to each of the plurality of nodes,
Each of the plurality of nodes stores second data based on the first data when an agreement of the plurality of nodes is formed with respect to the first data transmitted from the first terminal. Then
The construction management server receives a request for third data related to the second data from the second terminal, and transmits the request for the third data to the node,
The node transmits the third data to the construction management server in response to a request from the construction management server,
The construction management server receives the third data from the node, transmits the third data to the second terminal,
The second terminal confirms the authenticity of the data regarding the construction data based on the third data,
Construction data management system. The management system according to claim 5, wherein the construction management server creates a report or form based on the first data, and transmits the report or form to the node. A management network in which multiple nodes are connected to each other,
Data relating to pile foundations, data measured using a pile driver, or first data relating to construction data including construction inspection result data, and a first terminal for transmitting to each of the plurality of nodes, ,
With a second terminal,
Each of the plurality of nodes is
Save the second data based on the first data when the agreement of the plurality of nodes is formed with respect to the first data transmitted from the first terminal,
Transmitting third data related to the second data to the second terminal,
The second terminal confirms the authenticity of the data regarding the construction data based on the third data,
Construction data management system. A management network in which multiple nodes are connected to each other,
A first terminal for transmitting first data regarding construction data to each of the plurality of nodes;
With a second terminal,
Each of the plurality of nodes is
Regarding the first data transmitted from the first terminal, when the agreement of the plurality of nodes is formed, the second data based on the first data is related to the construction data whose authenticity is guaranteed. Save as data,
Transmitting third data relating to the construction data, which is related to the second data, to the second terminal,
The second terminal acquires the third data as data related to construction data whose authenticity is guaranteed,
The third data includes a part of the construction data,
Construction data management system. A management network in which multiple nodes are connected to each other,
A first terminal,
A second terminal,
With a construction management server,
The first terminal transmits first data regarding construction data to the construction management server,
The construction management server receives the first data from the first terminal and transmits the first data to each of the plurality of nodes,
Each of the plurality of nodes authenticates the second data based on the first data when the consensus of the plurality of nodes is formed regarding the first data transmitted from the first terminal. Data is saved as data related to construction data,
The construction management server receives a request for third data related to the second data from the second terminal, and transmits the request for the third data to the node,
The node transmits the third data to the construction management server in response to a request from the construction management server,
The construction management server receives the third data from the node, transmits the third data to the second terminal,
The second terminal acquires the third data as data related to construction data whose authenticity is guaranteed,
Construction data management system. The management system according to claim 9, wherein the construction management server creates a report or form based on the first data, and transmits the report or form to the node. A management network in which multiple nodes are connected to each other,
A first terminal for transmitting first data regarding construction data to each of the plurality of nodes;
With a second terminal,
Each of the plurality of nodes is
Regarding the first data transmitted from the first terminal, when the agreement of the plurality of nodes is formed, the second data based on the first data is related to the construction data whose authenticity is guaranteed. Save as data,
Transmitting third data related to the second data to the second terminal,
The second terminal acquires the third data as data related to construction data whose authenticity is guaranteed,
The construction data is data on a pile foundation, including data measured using a pile driver, or data of inspection results of construction,
Construction data management system. The node stores data including a value calculated based on previously stored second data as the second data when storing the new second data. The management system according to any one of the above. Multiple people involved in one construction are providing the node,
Construction data related to the one construction is stored in the node,
The management system according to any one of claims 1 to 12. The management system according to any one of claims 1 to 13, wherein one person provides the node for each construction field and a plurality of persons in a plurality of construction fields provide the plurality of nodes. The management system according to claim 1, wherein a plurality of persons in the same construction field provide the nodes, so that the plurality of persons provide the plurality of nodes. 16. The node according to claim 1, wherein each of the nodes determines that an agreement has been formed when determining that the second data stored in more than a predetermined number of the plurality of nodes match. Management system described in paragraph. On the first terminal,
Send the first data related to the construction data to each of the plurality of nodes,
Providing a first program for transmitting data relating to the construction data to a second terminal;
In the node,
With respect to the first data transmitted from the first terminal, when agreement of a plurality of the nodes is formed, the second data based on the first data is stored in the node,
Providing a second program for causing the second terminal to transmit the third data included in the second data; and
Providing the second terminal with a third program for confirming the authenticity of the data related to the construction data from the first terminal based on the third data. Management system manufacturing method.