JP7277209B2 - Communication system and process control system - Google Patents

Description

The present invention relates to communication systems and process control systems.

In some cases, work is performed in a space enclosed by radio wave shielding materials. For example, Patent Literature 1 describes that a welding operation is performed on a structure of a ship. Such a welding work is a work of welding so as to extend in a straight line in order to fix the members inside the hull.

Japanese Patent Application Laid-Open No. 2000-118482

As in the welding work shown in the above-mentioned Patent Document 1, when the work is performed in a space closed by radio wave shielding materials, it is necessary to transmit predetermined information to the outside, such as reporting the progress of the work. may occur. However, since the work site in the space enclosed by the radio wave shielding material is surrounded by the metal walls that serve as radio wave shields, it is impossible to communicate with the outside using, for example, Wi-Fi. Therefore, the operator must actually move to the outside of the space closed by the radio wave shielding material to report, or pull out the cable to the outside for wired communication. However, such a method may increase the workload of the worker.

SUMMARY OF THE INVENTION The present invention has been made in order to solve such problems, and provides a communication system and a process control system that can easily transmit information to the outside of a space closed off by radio wave shielding materials. With the goal.

A communication system according to the present invention includes a communication unit arranged at a work site in a space enclosed by a radio wave shielding material, and the communication unit communicates between the work site and the outside of the work site provided in the radio wave shielding material. Communicate radio waves through the mouth.

In such a communication system, a communication unit is arranged at a work site in a space enclosed by radio wave shielding materials. The communication unit communicates radio waves between the work site and the outside through a work port provided in the radio wave shielding material. In this manner, the communication unit uses radio waves that can pass through the working port, thereby enabling wireless communication with the outside. As described above, information can be easily transmitted to the outside of the space closed by the radio wave shielding material.

Here, the present inventors paid attention to radio waves in a low frequency band when communicating from a work site inside a metal structure through a work opening. Radio waves in such a low frequency band are not used in other fields of communication because of their extremely slow communication speed, and are not attracting attention. On the other hand, as a result of extensive research, the inventors of the present application have found that low-frequency radio waves are effective in a very special environment such as a work site inside a metal structure, and will continue their research. and found that radio waves in a low frequency band of 430 MHz or less are suitable. Therefore, the communication unit may communicate radio waves in a low frequency band of 430 MHz or less. In this case, the communication section can satisfactorily transmit information to the outside using the work port.

The work opening may serve both as a manhole for entry and exit of workers and as an opening through which radio waves pass. In this case, the number of holes formed in the radio wave shielding material can be reduced.

A receiving unit for receiving radio waves from the communication unit is arranged outside. The communication unit transmits encoded information obtained by encoding predetermined information to the receiving unit. Predetermined information may be obtained by querying the encoded information. Radio waves with a slow communication speed may be used to communicate with radio waves through the working port. By reducing the amount of information by the communication unit and the reception unit using the encoded information, it is possible to perform good communication using radio waves with a low communication speed.

Further provided is an input unit arranged at the work site for inputting predetermined information, the input unit comprising an RFID reader for reading the IC card, and a holding unit for holding the IC card in a readable state with the RFID reader. Be prepared. The holding unit holds the IC card in a readable state by the RFID reader, so that the RFID reader can read the held IC card repeatedly. Therefore, when a reading error by the RFID reader and a transmission error by the transmitting section occur, the RFID reader can read the IC card again and the transmitting section can transmit the process progress information again.

A process control system according to the present invention is a process control system that manages the process progress of a single continuous work performed on a single work, wherein the above-described communication system , and a display unit, an input unit for inputting process progress information indicating the process progress of the work, and transmitting the process progress information input by the input unit by radio waves. and a receiving unit arranged outside to receive the process progress information transmitted from the communicating unit, and the display unit displays the process progress information received by the receiving unit.

Such a process control system includes an input unit that is arranged at a work site and inputs process progress information indicating the process progress of the work. Therefore, the worker can input the process progress information on the spot at the work site. In other words, workers do not have to interrupt their work for a long time to report process progress information. The process progress information input in this manner is transmitted by the communication section and received by the reception section. The display unit can display the process progress information received by the reception unit. Therefore, the manager can quickly grasp the process progress information input at each work site through the display unit. In addition, since the process progress information can be exchanged as data, the manager can check the process progress even on a display unit other than the site. As described above, it is possible to easily comprehend the process progress of a single continuous work for a single work.

As described above, according to the present invention, it is possible to provide a communication system and a process control system that can easily transmit information to the outside of a space closed by radio wave shielding materials.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic system diagram which shows the structure of the communication system and process control system which concern on embodiment of this invention. FIG. 2 is a schematic diagram showing how a worker works in a steel structure that is a work site; It is a perspective view which shows some steel structures. It is a conceptual diagram for demonstrating the management procedure of process progress. 1 is a block configuration diagram of a process control system; FIG. It is a figure which shows an example of the encoding information which encoded process progress information. 4 is a diagram showing the configuration of an input unit; FIG. 4 is a conceptual diagram showing the operation of the input section; FIG. FIG. 2 is a conceptual diagram showing a communication system according to a comparative example;

Various embodiments are described in detail below with reference to the drawings. In each drawing, the same or corresponding parts are denoted by the same reference numerals, and overlapping descriptions are omitted.

FIG. 1 is a schematic system diagram showing configurations of a communication system 200 and a process control system 100 according to an embodiment of the present invention. As shown in FIG. 1, the process control system 100 includes a communication system 200 including an input device 1 and a control device 2A arranged in a work building B1, and a supervisory building B2 and an office building B3. and a management device 2B. The input device 1 is a device for a worker to input the process progress of work at each work site (within the steel structure 50) of the work building B1. The management device 2A is a device for collecting the process progress information input by each input device 1 and for outputting the process progress of the work in the work building B1. The management device 2B is a device for receiving information from the management device 2A and outputting work progress. The management devices 2A and 2B include an information processing section 3 that performs various types of information processing, and a display section 4 that displays process progress.

The process control system 100 is a system that manages the process progress of a single continuous work performed on a single work. Such work involves performing the same operation for a long time on the same very large work. For example, in a manufacturing line for small products, one worker repeats a single work for a long time, and the work to be worked on is quickly changed in a short time. That is, the management of the process progress of such work is to manage the process progress of "a single work that is intermittently performed for each of a plurality of works". It is different from the process control system 100 concerned. Also, when one or more workers manufacture one product at one work site, one work is worked on, but the work content itself changes quickly in a short period of time. That is, the management of the process progress of such work is to manage the process progress of "a plurality of works performed on a single work", and the process management system 100 according to the present embodiment different. The process management system 100 is a system capable of grasping and managing the process progress of each work performed at a plurality of locations in a plurality of work buildings B1.

First, the work to be managed by the process management system 100 will be described with reference to FIGS. 2 and 3. FIG. FIG. 2 is a schematic diagram showing how a worker works at a work site 55 inside the steel structure 50. As shown in FIG. FIG. 3 is a perspective view showing part of the steel structure 50. As shown in FIG. Note that the steel plate on the ceiling side is omitted in FIG. 3 to show the internal configuration. In the present embodiment, welding work performed inside the steel structure 50 (inside a space closed by radio wave shielding material) is exemplified as such work. Examples of the steel structure 50 include shipbuilding blocks that form part of the hull of a ship. As shown in FIGS. 2 and 3, the steel structure 50 is a box-shaped structure made of steel plates, surrounded on all sides and above and below by outer walls 51, and the inner space is also formed in a grid pattern by inner walls 52. partitioned. The outer wall 51 and the inner wall 52 are formed with a work opening 53, which is an opening for a worker to pass through (see FIG. 3). In addition, reinforcing members and the like exist in each room.

Each worker welds walls and reinforcing members in each room. Unlike the work of welding small parts, the steel structure 50 requires a long time for welding work per place. For example, if the inner wall 52 per side of one room is regarded as a single workpiece, it is necessary to perform a continuous single welding operation over the length L1 (see FIG. 2). As described above, in the steel structure 50, it takes a long time to perform a single continuous work on a single work, so it is important to manage the progress of each work location. A worker performs welding work with the welding feeder 7 and the input device 1 installed near the work place. The welding feeder 7 and the input device 1 are arranged at least in a room where workers are working. As the worker moves along with the progress of the welding work, the welding feeder 7 and the input device 1 move along with the worker's movement. A management device 2A is arranged outside the steel structure 50 . 2 A of management apparatuses receive the process progress information which each worker in the steel structure 50 input into the input device 1, and collect the said information.

In FIG. 1, one management device 2A exists in the work building B1, and the management device 2A receives process progress information from the input devices 1 in the plurality of steel structures 50. FIG. Instead of this, one management device 2A may be provided for one steel structure 50 . At this time, a plurality of management devices 2A may transmit process progress information to the management devices 2B of the other buildings B2 and B3. In addition, a management device 2B for aggregating the process progress information of a plurality of management devices 2A is provided in the work building B1, and the management device 2B transmits the consolidated process progress information to the management devices 2B of the other buildings B2 and B3. You can

Here, how the process progress is managed in the process control system 100 will be described with reference to FIG. First, a work plan for each worker is determined in advance by the start time of the day's work. At this time, a work lot is set in which the amount of work and the completion time are linked. In FIG. 4A, for example, the amount of welding to be completed by 9:00, 10:00 and 11:00 is set as a work lot. A label or the like may be attached to the work at a position corresponding to the work lot for each time. When the actual work is started, the worker inputs that the work lot at 9:00 is completed when the welding work for the work lot at 9:00 is completed. The time at which the input is made is acquired as the completion time of the work lot at 9:00. For example, worker A completed the 9:00 work lot at 9:10. As a result, as shown in FIG. 4B, the display unit 4 displays the worker, the content of the work lot, and the completion time in a state of being associated with each other. From the information shown in FIG. 4(b), the manager understands that worker A generally works late, worker B works early, and worker C generally works on time. be able to.

Next, a block configuration of the process control system 100 will be described with reference to FIG. FIG. 5 is a block diagram of the process control system 100. As shown in FIG. FIG. 5 shows only one input device 1 and one management device 2A. As shown in FIG. 5 , the input device 1 includes an information processing section 11 and an input section 20 . The management device 2A includes an information processing section 3 and a display section 4 .

The input unit 20 of the input device 1 is arranged at a work site 55 where work is performed, and is a part for inputting process progress information indicating the process progress of the work. That is, it is a part that receives an operation for information input by the operator. The input unit 20 has an RFID reader 10 . The input unit 20 acquires process progress information by reading the worker's IC card with the RFID reader 10 . At least the name of the process being performed, the name of the worker, and the lot name are registered in advance in the IC card. The input unit 20 transmits the input process progress information to the information processing unit 11 . A specific configuration of the input unit 20 will be described later.

The display unit 4 of the management device 2A is a device that displays the process progress information received from the input device 1. FIG. The display unit 4 may be configured by an installation type monitor or the like. Alternatively, when the display unit 4 can wirelessly communicate with the information processing unit 3, the display unit 4 may be configured by a portable monitor such as a monitor of a smartphone or a tablet terminal.

The information processing units 3 and 11 are provided with processors, memories, storages, communication interfaces and user interfaces, and are configured as general computers. The processor is a calculator such as a CPU (Central Processing Unit). The memory is a storage medium such as ROM (Read Only Memory) or RAM (Random Access Memory). The storage is a storage medium such as an HDD (Hard Disk Drive). A communication interface is a communication device that implements data communication. A user interface is an output device such as a liquid crystal or a speaker, and an input device such as a keyboard, a touch panel, or a microphone. The processor controls the memory, storage, communication interface, and user interface, and implements the functions of the information processing units 3 and 11, which will be described later. In the information processing units 3 and 11, for example, programs stored in the ROM are loaded into the RAM, and the programs loaded into the RAM are executed by the CPU, thereby realizing various functions. The information processing units 3 and 11 may be composed of a plurality of computers.

The information processing section 11 of the input device 1 is a part of the input device 1 that performs various types of information processing. The information processing section 11 also functions as a transmission section that transmits the process progress information input by the input section 20 to the management device 2A. The information processing section 11 includes an encoding section 12 and a communication section 13 .

The information processing unit 3 of the management device 2A is a part that performs various information processing of the management device 2A. The information processing section 3 also functions as a receiving section that receives the process progress information transmitted from the information processing section 11 . The information processing section 3 includes a compound section 16 , a communication section 17 and a storage section 18 .

The communication units 13 and 17 are parts that transmit and receive information by exchanging radio waves with the outside. In this embodiment, the communication section 13 transmits process progress information to the communication section 17 . The communication unit 13 and the communication unit 17 can communicate wirelessly using radio waves. Therefore, the information processing section 11 can wirelessly transmit the process progress information to the information processing section 3 . The communication unit 17 of the management device 2A can transmit process progress information to another management device 2B (see FIG. 1).

Here, wireless communication means between the input device 1 and the management device 2A will be described in detail. The input device 1 is arranged inside the steel structure 50 (see FIG. 2). That is, the input device 1 is surrounded by a steel plate that serves as a radio wave shield. In this way, the input device 1 is arranged in a place where radio wave propagation disturbances are likely to occur. Also, since welding may be performed by a welding machine near the input device 1, noise is generated in the radio waves. As described above, welding work is performed in a special environment, unlike a normal factory line, so that a commonly used wireless communication means such as Wi-Fi cannot be used.

Therefore, the communication units 13 and 17 communicate radio waves between the work site 55 and the outside through the work opening 53 provided in the steel structure 50 . Specifically, the communication units 13 and 17 use wireless communication means using radio waves in a low frequency band. Radio waves in the low frequency band have strong diffraction and reflection characteristics. Further, the frequency of this wireless communication means is set in consideration of the diameter of the working port 53, the limit of the frequency, and the like. At this time, the work opening 53 serves both as a manhole for entry and exit of workers and as an opening through which radio waves pass. Furthermore, the wireless communication means employs a noise-resistant modulation method so as not to receive noise from the welding machine. For example, the communication units 13 and 17 may communicate radio waves in a low frequency band of 429 MHz or more and 430 MHz or less, preferably 429.250 MHz or more and 429.7375 MHz or less. Also, the LoRa modulation method may be adopted as a modulation method that is resistant to noise. Of course, the modulation method is not limited to this. As shown in FIG. 3, the input device 1 is placed in a room R1 inside the steel structure 50. As shown in FIG. Since the input device 1 uses radio waves MW in a low frequency band, reflection/diffraction can be performed within the steel structure 50 . Therefore, the radio wave MW spreads over a wide angle from the work opening 53 of the outer wall 51 . Further, since the radio waves MW are repeatedly reflected and diffracted in the room R2 adjacent to the room R1, the radio waves MW are diffused over a wide angle from the work opening of the room R2 as well. When high-frequency radio waves MW are used, reflection and diffraction in the rooms R1 and R2 are not so much performed, so the strength of the radio waves in the rooms R1 and R2 is low, and even when exiting from the work opening 53, the radio waves are diffused. communication is possible only in the vicinity of a straight direction.

Radio waves in the low frequency band are suitable for communication from within the steel structure 50 as described above. However, such radio waves have a problem of extremely low communication speed due to their low frequency. Therefore, the input device 1 transmits encoded information obtained by encoding the process progress information to the management device 2A. In addition, the management device 2A acquires process progress information by referring to a preset data table and encoded information. Specifically, the encoding unit 12 encodes the process progress information. Then, the communication unit 13 transmits the process progress information to the communication unit 17 as encoded information. The compounding unit 16 receives the encoded information from the communication unit 17 and acquires the process progress information by compounding the encoded information. The combining unit 16 acquires process progress information by referring to the data table and the encoded information stored in the storage unit 18 .

FIG. 6 is a diagram showing an example of encoded information obtained by encoding process progress information. Coded information is encoded by a simple combination of letters and numbers. In the example shown in FIG. 6, the encoded information consists of four items: "process name", "operator", "lot name", and "reading time". The "process name" indicates the type of process that the worker who has input the process progress information is performing. Alphabets corresponding to process names are set in advance. "Worker" indicates the name of the worker who entered the process progress information. Alphabets corresponding to the names of workers are set in advance. "Lot name" indicates the lot name entered by the operator. A number corresponding to the lot name is set in advance. "Reading time" indicates the time when the worker inputs the process progress information. The "process name", "worker" and "lot name" are information registered in the IC card read by the RFID reader 10, and the "process name", "worker" and "lot name" are encoded by the encoding unit 12 in advance. Each item of "lot name" is assigned a corresponding alphabet or number, coded and described on the label. "Reading time" is information automatically registered when the RFID reader 10 reads the IC card. The encoding unit 12 associates the registered time with the encoded information.

The combining unit 16 acquires encoded information. Then, the compounding unit 16 compares the compounding information with the data table stored in the storage unit 18 . Correspondence between each item and alphabets or numbers is preset in the data table. Therefore, after obtaining the encoded information "A A 01 1020", the combining unit 16 searches the data table for the item "process name". Then, the composite unit 16 searches for "A" from "process name" and acquires that "A" corresponds to "welding". The composite unit 16 acquires other items by comparing them with the data table in the same procedure. Also, the composite unit 16 grasps the time from the number "1020". As described above, the combining unit 16 can restore the original process progress information by combining the encoded information. The compounding unit 16 transmits the compounded process progress information to the display unit 4 .

Next, the configuration and operation of the input unit 20 will be described in detail with reference to FIGS. 7 and 8. FIG. FIG. 7 is a diagram showing the configuration of the input unit 20. As shown in FIG. FIG. 8 is a conceptual diagram showing the operation of the input section 20. As shown in FIG. As shown in FIG. 7A, the input unit 20 includes an RFID reader 10 that reads the IC card 30, and a holding unit 25 that holds the IC card 30 in a state in which the IC card 30 can be read by the RFID reader 10. Prepare. The holding portion 25 has a box-like shape that can accommodate the IC card 30 . Further, the holding part 25 can store the stored IC card 30 in a position where the RFID reader 10 can read it. The holding section 25 can hold a plurality of IC cards 30 at the same time. The holding part 25 is attached to the welding feeder 7 . The holding portion 25 includes a rear wall portion 26 joined to the welding feeder 7, a front wall portion 21 facing the rear wall portion 26, and side walls connecting the rear wall portion 26 and the front wall portion 21 at both end sides. It has parts 22 , 22 and a bottom part 23 . The RFID reader 10 is provided on the rear wall portion 26 . Therefore, an IC card 30 placed between the rear wall 26 and the front wall 21 is read by the RFID reader 10 . Since the IC card 30 is held at a position facing the RFID reader 10 after being housed in the holding portion 25 , it is repeatedly read by the RFID reader 10 . Note that the holding portion 25 can hold a plurality of IC cards 30 in an overlapping state. For example, when eight IC cards 30 are used for one day's work, the holding unit 25 can hold all eight IC cards 30 .

As shown in FIG. 8, the worker inserts the corresponding IC card into the input unit 20 after completing the work lot for a predetermined time. Then, when the next work lot is completed, the worker further inserts the corresponding IC card 30 into the input unit 20 . In this way, the number of IC cards 30 held in the input unit 20 increases as the work progresses. The input unit 20 repeatedly reads information from the inserted IC card 30, and the information processing unit 11 repeatedly transmits the information as process progress information. The input unit 20 can read information of all the inserted IC cards 30 .

A specific description will be given of how the input unit 20 reads the IC card 30 . A worker has a plurality of IC cards 30 corresponding to a predetermined work lot. First, when the worker finishes the work corresponding to the 9:00 o'clock lot, he/she inserts the IC card 30 corresponding to the 9:00 o'clock work lot into the input unit 20 . At this time, the input unit 20 reads the information from the IC card 30 and sets the time when the information is read for the first time as the completion time of the work lot (9:05 in FIG. 8). Even when the input unit 20 fails to read the IC card 30, the input unit 20 repeats reading, so the information of the IC card 30 can be acquired at any timing. The input unit 20 acquires the input information and the set time as process progress information, and the information processing unit 11 transmits the information to the management device 2B. Here, the input unit 20 has successfully transmitted to the management device 2B in the first transmission. Even after success, the input unit 20 repeatedly reads the same process progress information, and the information processing unit 11 continues to repeatedly transmit it. Although omitted in FIG. 8, even after the IC card 30 corresponding to another work lot is inserted, the input unit 20 continues to hold the IC card 30 corresponding to the 9 o'clock work lot. Continue to read the process progress information for the 9 o'clock lot.

Next, when the work lot at 10 o'clock is completed, the worker inserts the IC card 30 corresponding to the work lot at 10 o'clock into the input unit 20 . The input unit 20 acquires process progress information by reading the IC card 30 and setting the completion time (10:05 in FIG. 8), and the information processing unit 11 transmits it to the management device 2B. However, the position of the input device 1 at that time is a position where the radio wave condition is poor, and the information processing section 11 fails in transmission to the management device 2B. However, the input unit 20 repeatedly reads the process progress information, and the information processing unit 11 repeatedly transmits it. Therefore, when the input device 1 reaches a position where the radio wave condition is good as the welding work progresses, the information processing section 11 succeeds in transmitting the process progress information to the management device 2B. When the IC card 30 of a new work lot is read, the input unit 20 sets the time when the reading was successful for the first time. The input unit 20 repeatedly reads the IC card 30 of the work lot, but does not update the time when the IC card 30 is read from the second time onward, but maintains the time set the first time. Therefore, the information processing unit 11 does not transmit the time when the process progress information was successfully transmitted, but transmits the time (10:05) when the IC card of the work lot of 10:00 was read for the first time. do. Accordingly, the information processing section 11 can correctly transmit the time when the worker completed the work lot at 10 o'clock.

Next, when the work lot at 11:00 is completed, the worker inserts the IC card 30 corresponding to the work lot at 11:00 into the input unit 20 . The input unit 20 acquires the process progress information by reading the IC card 30 and setting the completion time (11:05 in FIG. 8), and the information processing unit 11 transmits it to the management device 2B. Here, the information processing section 11 repeatedly fails to transmit the process progress information for the work lot at 11:00, and the IC card 30 corresponding to the next work lot at 12:00 is inserted into the input section 20 . At this time, the input unit 20 repeatedly reads all the process progress information of the IC card 30 it holds, and the information processing unit 11 repeatedly transmits it. 2B can simultaneously receive the process progress information for the work lot at 11:00 and the process progress information for the work lot at 12:00. The input unit 20 and the information processing unit 11 perform the same processing on the IC cards 30 of subsequent work lots.

Next, functions and effects of the process control system 100 according to this embodiment will be described.

First, a process control method according to a comparative example will be described. In the process control method according to the comparative example, when the worker completes the work for the work lot at a specific time, he carries the pace card for the work lot to the bulletin board. The bulletin board is installed at a predetermined position outside the steel structure 50 in the work building B1. Accordingly, the manager can grasp the process progress by referring to the bulletin board. However, in such a process control method, the worker has to go to the bulletin board to paste the pace card, which is very troublesome. Also, the welding work must be suspended during this time. In addition, the manager cannot grasp the process progress without going to the bulletin board provided at the site, and it takes time and effort to grasp the information. Moreover, since it takes time and effort to attach the pace cards, the frequency of attachment cannot be increased, and it is difficult for the manager to grasp the progress of the process in detail.

Further, as shown in FIG. 9 , in the communication system 300 according to the comparative example, the input device 1 inside the steel structure 50 and the management device 2A are connected by wire using a cable 40 . In this case, it is necessary to pull out the cable 40 from the input device 1 at the work site 55 to the external management device 2A, which increases the work load. At this time, the cables 40 must be pulled out from the narrow and few work openings 53, further increasing the work load. In addition, when moving the welding feeder 7 and the input device 1 as the work progresses, the cable 40 becomes an obstacle, which increases the burden during the work.

On the other hand, in the communication system 200 , the input device 1 having the communication section 13 is arranged at the work site 55 inside the steel structure 50 . The communication unit 13 communicates radio waves between the work site 55 and the outside through the work opening 53 provided in the steel structure 50 . In this manner, the communication unit 13 uses radio waves that can pass through the working port 53, thereby enabling wireless communication with the outside. As described above, information can be easily transmitted to the outside of the steel structure 50 .

Further, in the communication system 200 , there is no need to extend a cable from the information processing section 11 at the work site 55 inside the steel structure 50 to the information processing section 3 existing outside the steel structure 50 . Employing wireless communication eliminates the trouble of the wired communication system 300 shown in FIG.

The communication unit 13 communicates radio waves in a low frequency band of 430 MHz or less. In this case, the communication unit 13 can use the working opening 53 to transmit information to the outside.

The work opening 53 serves both as a manhole for entry and exit of workers and as an opening through which radio waves pass. In this case, the number of holes formed in the steel structure 50 can be suppressed.

An information processing unit 11 that receives radio waves from the communication unit 13 is arranged outside. The information processing unit 11 transmits encoded information obtained by encoding the process progress information in the encoding unit 12 to the information processing unit 3. , the information processing unit 3 acquires process progress information by referring to a preset data table and encoded information in the compound unit 16 . Since the inside of the steel structure 50 is a place where it is difficult for the information processing section 11 to communicate, the information processing section 11 communicates in a low frequency band in order to transmit the process progress information to the information processing section 3 . Since the information processing units 11 and 3 reduce the amount of information using the encoded information, it is possible to enable good communication even in a low frequency band with a slow communication speed.

The input unit 20 is arranged at the work site 55 and further includes an input unit 20 for inputting predetermined information. and a holding portion 25 that holds the IC card 30 . The holding unit 25 holds the IC card 30 in a readable state with the RFID reader 10 , so that the RFID reader 10 can read the held IC card 30 repeatedly. Therefore, when a reading error by the RFID reader 10 and a transmission error by the information processing unit 11 occur, the RFID reader 10 can read the IC card again, and the information processing unit 11 can transmit the process progress information again. can be done.

The process control system 100 is a process control system 100 that manages the process progress status of a single continuous work performed on a single work, and includes the above-described communication system 200, and a display unit 4, the communication system 200 includes an input unit 20 arranged at a work site for inputting process progress information indicating the process progress of the work, and an input unit 20 for inputting the process progress information. An information processing unit 11 that transmits by radio waves, and an information processing unit 3 that is arranged outside and receives process progress information transmitted from the information processing unit 11 . display the process progress information.

Such a process management system 100 is arranged at a work site 55 and includes an input unit 20 for inputting process progress information indicating the process progress of the work. Therefore, the worker can input the process progress information on the spot at the work site. That is, the worker does not need to go to the bulletin board to report the process progress information, and does not need to interrupt the work for a long time. The process progress information input in this manner is transmitted by the information processing section 11 and received by the information processing section 3 . The display unit 4 can display the process progress information received by the information processing unit 3 . Therefore, the manager can quickly grasp the process progress information input at each work site via the display section 4 . In addition, since the process progress information can be exchanged as data, the manager can check the process progress even on the display unit 4 other than the site. For example, the process progress information can be confirmed on the display units 4 of the supervisory building B2 and the office building B3, and the process progress information can also be confirmed on the smartphone or the like owned by the manager. As described above, it is possible to easily grasp the process progress of a single continuous work performed on a single work.

The invention is not limited to the embodiments described above.

For example, in the above-described embodiments, the welding work for the structural parts of ships was exemplified as an example of performing a continuous single work on a single work. Instead of this, work such as an outfitting process, electrical equipment process, temporary tacking process, etc. may be managed. Moreover, the process control system 100 may be applied not only to the work within the steel structure 50 but also to the work at a work site such as a dock or a ship. The communication system according to the present invention can be applied to a wide range of work as long as the work is performed in a space closed by radio wave shielding materials.

DESCRIPTION OF SYMBOLS 1... Input device, 3... Information processing part (receiving part), 4... Display part, 10... RFID reader, 13... Communication part, 20... Input part, 25... Holding part, 30... IC card, 50... Steel structure , 53... Work entrance, 55... Work site, 100... Process control system, 200... Communication system.

Claims (5)

Equipped with a communication unit that is placed at the work site in a space enclosed by radio wave shielding materials,
The communication unit communicates radio waves between the work site and the outside of the space enclosed by the radio wave shielding material through a work opening provided in the radio wave shielding material,
The communication system , wherein the communication unit communicates radio waves in a low frequency band of 430 MHz or less . 2. The communication system according to claim 1 , wherein said work opening serves both as a manhole for entry and exit of workers and as an opening through which said radio waves pass. A receiving unit for receiving the radio waves from the communication unit is disposed outside the communication unit,
The communication unit transmits encoded information obtained by encoding predetermined information to the receiving unit,
3. The communication system according to claim 1, wherein said receiving unit acquires said predetermined information by referring to a preset data table and said encoded information. Further comprising an input unit arranged at the work site for inputting predetermined information,
The input unit
an RFID reader that reads an IC card;
4. The communication system according to any one of claims 1 to 3 , further comprising a holding section that holds said IC card in a readable state with said RFID reader. A process control system that manages the process progress of a single continuous work performed on a single work,
A communication system according to any one of claims 1 to 4 , and a display unit,
The communication system is
an input unit arranged at the work site for inputting process progress information indicating the process progress of the work;
the communication unit that transmits the process progress information input by the input unit by the radio wave;
a receiving unit that is arranged outside and receives the process progress information transmitted from the communication unit;
The process management system, wherein the display unit displays the process progress information received by the reception unit.

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