Remote monitoring system for maintenance painting work on steel structures

Abstract

To provide a remote monitoring system for a maintenance coating construction of a steel structure that can remotely monitor spatial information in a work space, a physical condition of a worker, and the like.SOLUTION: A remote monitoring system performs remote monitoring by generating spatial output information based on spatial information acquired by a sensor 10, generating worker output information based on positional information and worker information acquired by using an ID tag 50, and outputting contents thereof to a display 35 and a portable terminal 60.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a remote monitoring system for maintenance painting work on steel structures, which is capable of remotely monitoring the work environment in maintenance painting work for painting the surfaces of steel structures such as steel bridges, tunnels, and factory plants. [Background technology]

[0002] Preventive maintenance has traditionally been carried out on steel structures such as steel bridges, whether they are new or existing, to prevent rust and other issues, or, in the case of existing steel structures in particular, to renew paint that has become corroded due to aging. As preventive maintenance requires the removal of rust and other issues and old paint films, in recent years blasting (type 1 scraping) has been used to remove the rust and paint films, and then a new coat of paint is applied (see, for example, Patent Document 1).

[0003] At such construction sites, scaffolding is set up to carry out the above-mentioned blasting and painting, and the work space is generally shielded from the outside by covering it with a dustproof sheet or the like to prevent dust, paint film, and newly applied paint from scattering outside. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-144543 Summary of the Invention [Problem to be solved by the invention]

[0005] As mentioned above, since the work space is shielded from the outside, it is necessary for an observer to actually patrol the work space in order to monitor the work environment such as the temperature and humidity of the work space, manage the workers, etc. However, in the case of large steel structures such as steel bridges, the work space is vast, or the work space is complicated and has many blind spots, so it requires a great deal of cost and effort for an observer to patrol the entire space in detail.

[0006] Therefore, the present invention aims to provide a remote monitoring system for maintenance painting work on steel structures that can remotely monitor spatial information within the work space and the physical condition of workers, etc., to ensure the safety of workers, etc. [Means for solving the problem]

[0007] The present invention is a remote monitoring system for steel structure maintenance painting work, which monitors the working environment in a work space where workers perform the maintenance painting work, and which shields the areas of the steel structure to be painted from the outside to prevent dust and the like generated during the maintenance painting work from scattering to the outside, and which comprises a work space information detection unit that acquires spatial information of the work space, a main control unit that receives the spatial information acquired by the work space information detection unit via a predetermined network line and generates predetermined spatial output information based on the received spatial information, and an output terminal unit that outputs the content of the spatial output information generated by the main control unit in a predetermined format, and further includes a worker information detection unit carried by the worker. the worker information detection unit acquires position information of the worker based on the work space and worker information, which is information on the physical condition and / or movements of the worker, in association with information specific to the worker; the main control unit receives the position information and worker information acquired by the worker information detection unit via a predetermined network line and generates predetermined worker output information based on the received position information and worker information in association with the information specific to the worker; and the output terminal unit outputs the content of the worker output information generated by the main control unit in a predetermined format.

[0008] In this configuration, for example, in a so-called scaffolding work space, the output terminal unit can be installed in a construction office or carried by a site supervisor, allowing the spatial information and worker information to be monitored remotely in real time, thereby significantly reducing the cost and labor required for monitoring. [Effects of the Invention]

[0009] The remote monitoring system for maintenance painting work on steel structures of the present invention has the excellent effect of significantly reducing the labor required for safety monitoring work and ensuring the safety of workers and others. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a flow chart showing the procedure for maintenance painting work on a steel bridge according to an embodiment. [Figure 2] 1 is an explanatory diagram of a remote monitoring system for maintenance painting work on a steel bridge according to an embodiment. [Figure 3] FIG. 2 is a block diagram of a server according to an embodiment. [Figure 4] FIG. 10 is an explanatory diagram showing the contents of spatial output information displayed on the display according to the embodiment. [Figure 5] FIG. 10 is an explanatory diagram showing the contents of spatial output information displayed on the display according to the embodiment. [Figure 6] FIG. 10 is an explanatory diagram showing the contents of worker output information displayed on the display according to the embodiment. [Figure 7] FIG. 10 is an explanatory diagram illustrating the contents of worker output information related to a specific worker that is displayed on the display according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, a detailed description will be given of an embodiment of the remote monitoring system for maintenance painting work on steel structures according to the present invention. Note that the present invention is not limited to the embodiment shown below, and the design can be modified as appropriate.

[0012] First, the procedure for the maintenance painting work on steel bridge K, which is a steel structure, will be explained below.

[0013] As shown in Figure 1, first, temporary protection equipment is installed on steel bridge K, which is the target of maintenance. Specifically, scaffolding is temporarily set up on steel bridge K, and dustproof sheets are stretched over it to prevent dust and other particles from leaking outside (scaffolding installation process).

[0014] In addition, the non-painted portions are cured, and advance preparations are made (S101) such as installing equipment for projecting a common projection material that can simultaneously perform blasting and shot peening. In this embodiment, a common projection material is projected, but it goes without saying that the blasting and shot peening may be performed as separate processes using different metallic projection materials. Also, only one of the blasting and shot peening processes may be performed.

[0015] Thereafter, the type and thickness of the old paint film T applied to the steel bridge K, as well as the condition of the steel bridge K, are investigated (S102). Then, based on the results of the investigation, the type and spray speed of the blast material (common blast material) to be used are determined. Also, the type and application method of the paint film softener, which will be described later, are determined. Of course, S102 may be performed before S101.

[0016] Next, a paint film softener is applied to the old paint film T applied to the steel bridge K, and the process waits until a predetermined softening time has elapsed (S103: paint film softening step). Here, a known peeling material containing a water-based organic solvent as a main component is suitably used as the paint film softener. Specific examples of water-based organic solvents include, but are not limited to, alcohol-based solvents such as methyl alcohol, ethyl alcohol, and isopropyl alcohol; and ketone-based solvents such as acetone and methyl ethyl ketone. Examples of application methods include spraying, brushing, and roller application.

[0017] Next, the softened coating film T is scraped off with a hand tool such as a scraper or a skiving tool (S104: hand tool scraping step). In this step, it is desirable to scrape off at least about 70% of the coating film T to be completely removed. Here, the softened coating film T turns into a wet sheet and can be scraped off as a lump. This makes the process extremely easy to do. Note that this step has the advantage of reducing the amount of dust containing the coating film, but it can also be omitted as long as the blast material projection step described below is carried out.

[0018] Then, using the common shot material determined in S102, simultaneous blasting and shot peening are next performed (S105: shot material projecting step). Specifically, by projecting the common shot material, the remaining paint film T and the like on the steel bridge K are peeled off, and the surface of the area to be surface-adjusted is adjusted (blasting), while at the same time applying compressive residual stress to the surface of the steel bridge K (shot peening). This completely removes the paint film T that remained in the minute recesses on the surface of the steel bridge K.

[0019] It should be noted again that the shot material projection step is not limited to simultaneous blasting and shot peening, and each treatment may be performed in order, or only one of the treatments may be performed.

[0020] During this process, the paint film and rust that peels off during the simultaneous processing, as well as the used common blast material, are generated as dust, but the amount of dust is extremely small because the hand tool scraping process (S104) is carried out in advance. Also, because a dustproof sheet is installed in S101, the dust does not leak outside and accumulates in the work space.

[0021] The surface of the substrate that has been simultaneously blasted and shot peened is then inspected (S106). This inspection includes not only visual inspection, but also comparison with an ISO 8501 blast photo book or roughness inspection using a surface roughness measuring instrument. This allows confirmation that no unpeeled coating remains, that the surface roughness of the substrate is within specifications, and other such confirmations, allowing appropriate treatment to be carried out for areas that are insufficient. For example, areas that cannot be blasted are prepared using hand tools or the like.

[0022] The part whose base surface has been confirmed in this way is then subjected to a final finish coating to form a final coating film (S107). This coating is generally applied in multiple layers, such as a primer coat to prevent rust, an intermediate coat to protect the rust-preventive coat, and a top coat to provide the final finish.

[0023] Once the painting is complete, the painting is checked (S108). This check includes not only checking the film thickness after the paint has dried, but also checking the wet film thickness during the painting process, for example, using a wetness gauge. This check is also performed during the painting of the primer coat and the intermediate coat, as well as after the top coat, which is the final finish paint.

[0024] When the painting work is completed according to the above confirmation, the site is tidied up (S109). Specifically, the scaffolding, dustproof sheets, etc. are removed, and the blast material injection device is withdrawn, thereby completing the maintenance work.

[0025] In addition to the above steps, a dust collection step is also carried out (S110). Specifically, the used common blast material generated in the blast material projection step (S105) and dust containing peeling material, rust, etc. are collected while being separated.

[0026] As mentioned above, old paint films and projectile materials scatter and accumulate in work spaces where dustproof sheets are installed, creating a harsh environment for workers. In addition, the dustproof sheets shield the interior from the outside, making it difficult to see what is happening inside, and it is also necessary to monitor the concentrations of gases such as oxygen, carbon dioxide, and VOCs (volatile organic compounds).

[0027] A remote monitoring system 1 for maintenance painting work on a steel structure (hereinafter also referred to as the remote monitoring system 1) according to this embodiment will be described below.

[0028] As shown in Fig. 2, the remote monitoring system 1 is equipped with a sensor 10 as a work space information detection unit in a work space S where maintenance painting work is being carried out on a steel bridge K. The sensor 10 acquires spatial information such as the presence or absence of smoke, the location of high-temperature heat sources, oxygen concentration, carbon dioxide concentration, or VOC concentration.

[0029] Furthermore, for example, a site office 20 installed at a construction site is provided with a server 30 as a main control unit. The server 30 receives spatial information from the sensor 10 via a network line 40.

[0030] As shown in FIG. 3, the server 30 includes a CPU unit 31 configured as a central processing unit, and a memory unit 32 that stores various data relating to spatial information and worker information, which will be described later.

[0031] The CPU section 31 generates spatial output information 15, which will be described later, based on the obtained spatial information.

[0032] The generated spatial output information 15 is output in a predetermined format to a display 35 serving as an output terminal unit disposed in the field office 20. The content of the output will be described later.

[0033] Furthermore, workers entering and leaving the work space S carry ID tags 50 as worker information detectors. The ID tags 50 contain information specific to the workers and also acquire position information based on the work space S, and worker information, which is information on the workers' physical condition and movements, such as body temperature, pulse rate, and acceleration.

[0034] The server 30 also receives the location information and worker information from the ID tag 50 via the network line 40 .

[0035] The CPU unit 31 of the server 30 generates worker output information 55, which will be described later, based on the obtained position information and worker information.

[0036] The generated worker output information 55 is output to the display 35 in a predetermined format.

[0037] Next, the contents of the space output information 15 and the worker output information 55 output to the display 35 will be described.

[0038] As shown in FIG. 4, spatial output information 15 is output to a display 35.

[0039] The spatial output information 15 includes information based on the spatial information acquired by the sensor 10 as to whether any abnormalities have occurred within the working space S, such as whether or not there is smoke, whether or not there is a high-temperature heat source, and whether or not there are any abnormalities in the oxygen concentration, carbon dioxide concentration, and VOC concentration.

[0040] For example, if an abnormality occurs in the VOC concentration, the occurrence of the abnormality is notified by, for example, highlighting the column of the VOC concentration that is the subject of the abnormality, as shown in Figure 5. Specifically, when the CPU unit 31 of the server 30 detects an abnormal value, it executes a control process to issue warning information such as a warning message or warning sound from the display 35, etc. Note that the range of normal values ​​or the range of abnormal values ​​for each piece of information can be determined in advance based on predetermined regulations.

[0041] As shown in FIG. 6, the display 35 also displays worker output information 55.

[0042] The worker output information 55 includes information on whether a specific worker is inside or outside the work space S, based on the location information. The location information can be obtained using GPS, or by using a sensor that detects the ID tag 50 when the worker enters or leaves the work space S, or the like.

[0043] Furthermore, as shown in FIG. 7, the worker output information 55 includes information on whether the body temperature, pulse, acceleration, etc. of each individual worker are normal based on the worker information.

[0044] In this way, the supervisor (manager) at the work site can monitor the work space S by monitoring the spatial output information 15 and the worker output information 55 on the display 35 while in the site office 20, which can significantly reduce the burden of supervisory work. Also, the workers in the work space S can concentrate on their work with peace of mind.

[0045] Here, as shown in FIG. 2, instead of the display 35 as the output terminal unit, the contents of the spatial output information 15 and the worker output information 55 may be output to a mobile terminal 60 carried by the supervisor via a network line 40.

[0046] Once again, measures to improve the safety of the workplace and workers will be explained for each process. Note that the normal and abnormal value ranges for the information acquired by each sensor in each process can be determined appropriately according to the work content of each process.

[0047] In S101 of Figure 1, when the scaffolding for the steel bridge is being temporarily erected, the required sensors are placed at the work site. Then, the sensors are used to monitor the following items: 1. Monitoring people entering work sites (useful in the event of a disaster) 2. Monitoring the location of workers (useful in the event of a disaster)

[0048] In addition, sensors will be installed to monitor the temperature, humidity, and wind speed at the work site. These sensors will be used to monitor the following items: 3. Monitoring the wind speed that is the standard for suspending work (hereinafter referred to as the work suspension standard wind speed) (when working at height, high wind speeds are deemed dangerous). 4. Monitoring temperature and humidity to prevent heatstroke

[0049] After the scaffolding is temporarily set up, and when the sides of the scaffolding are planked to partition the work space S, the required sensors are placed at the work site. The sensors are used to monitor the following items: 1. Monitoring people entering work sites (useful in the event of a disaster) 2. Monitoring the location of workers (useful in the event of a disaster)

[0050] In addition, sensors will be installed to monitor the temperature, humidity, and wind speed at the work site. These sensors will be used to monitor the following items: 3. Monitoring the wind speed at which work should be stopped (high wind speeds are deemed dangerous when working at height) 4. Monitoring temperature and humidity to prevent heatstroke

[0051] After the above-mentioned planking protection, during the protective work of covering the scaffolding floor and sides, the required sensors are placed at the work site. The sensors are used to monitor the following items: 1. Monitoring people entering work sites (useful in the event of a disaster) 2. Monitoring the location of workers (useful in the event of a disaster)

[0052] In addition, sensors will be installed to monitor the temperature and humidity at the work site. These sensors will be used to monitor the following items: 3. Monitoring temperature and humidity to prevent heatstroke

[0053] Furthermore, in the coating film softening step (S103) and the hand tool scraping step (S104) in Fig. 1, required sensors are placed in the work space S. The following items are monitored using the sensors. 1. Monitoring people entering work sites (useful in the event of a disaster) 2. Monitoring the location of workers (useful in the event of a disaster)

[0054] In addition, sensors will be installed to monitor the temperature and humidity, fire occurrence, and VOC concentration in the workspace S. These sensors will be used to monitor the following items: 3. Monitoring temperature and humidity to prevent heatstroke 4.Fire monitoring 5. Monitoring VOC concentrations (to eliminate the risk of explosions and fires and to prevent worker poisoning)

[0055] In addition, in the blast material projecting step (S105) in Fig. 1, required sensors are placed in the working space S. The sensors are used to monitor the following items. 1. Monitoring people entering work sites (useful in the event of a disaster) 2. Monitoring the location of workers (useful in the event of a disaster)

[0056] In addition, sensors will be installed to monitor the temperature and humidity, dust concentration, and VOC concentration in the workspace S. The following items will be monitored using these sensors. 3. Monitoring temperature and humidity to prevent heatstroke 4. Monitoring dust concentrations (eliminating the risk of dust explosions and preventing workers from suffering from dust-related injuries) 5. Monitoring VOC concentrations (to eliminate the risk of explosions and fires and to prevent worker poisoning)

[0057] In addition, in the painting process (S107) in FIG. 1, required sensors are placed in the work space S. The sensors are used to monitor the following items. 1. Monitoring people entering work sites (useful in the event of a disaster) 2. Monitoring the location of workers (useful in the event of a disaster)

[0058] In addition, sensors will be installed to monitor the temperature and humidity, fire occurrence, and dust concentration in the workspace S. The following items will be monitored using these sensors. 3. Monitoring temperature and humidity to prevent heatstroke 4.Fire monitoring 5. Monitoring VOC concentrations (to eliminate the risk of explosions and fires and to prevent worker poisoning)

[0059] Furthermore, by using sensors placed as described above, it is possible to simultaneously carry out quality control of maintenance work as described below.

[0060] By monitoring the temperature and humidity in the paint film softening step (S103) in Fig. 1, it is possible to properly ensure the paint stripper's performance as specified in advance. For example, it is proposed that, in accordance with the manufacturer's specifications for the materials used, if the temperature falls below 5°C or the humidity exceeds 85% in this step, the CPU 31 of the server 30 executes a control process to issue warning information such as a warning message or a warning sound from the display 35 or the like.

[0061] Furthermore, by monitoring the dust concentration and VOC concentration in the blast material projection process (S105) and painting process (S107) in Fig. 1, if the VOC concentration rises when the dust concentration is high, it is possible to recognize that a problem of dust-involved painting has occurred, resulting in a decline in quality, and to prevent such a problem from occurring. For example, it is proposed that if the VOC concentration rises even though the dust concentration is high, the CPU unit 31 of the server 30 executes control processing to issue warning information such as a warning message or warning sound from the display 35, etc.

[0062] Furthermore, in the painting process (S107) of Figure 1, if the temperature and humidity conditions are not suitable for painting, measures such as suspending the painting process can be taken. This makes it possible to properly ensure the predetermined quality of the painting. For example, in accordance with the painting prohibition conditions described in the Steel Highway Bridge Corrosion Prevention Handbook (author: edited by Japan Road Association, publisher: Japan Road Association), it is proposed that the CPU 31 of the server 30 executes control processing to issue warning information such as a warning message or warning sound from the display 35, etc., if the temperature falls below 5°C or the humidity exceeds 85% during the process.

[0063] Similarly, by monitoring the interval time when the VOC concentration rises in the painting process (S107) in Figure 1, it is possible to ensure the appropriate coating hardening time when multiple layers of paint are applied, and to confirm the appropriate interval between painting operations. For example, it is proposed that if an increase in VOC concentration is detected before the specified painting interval in the process, according to the painting interval described in the Steel Highway Bridge Corrosion Prevention Handbook, the CPU unit 31 of the server 30 executes control processing to issue warning information such as a warning message or warning sound from the display 35, etc.

[0064] Generally, in the case of steel bridges such as those on expressways, the bridge is divided into multiple sections along its length, and when a specified task is completed in one section, the same task begins in the adjacent section, and new work begins in the original section where the task was completed.This procedure allows construction to proceed in this way, so it is also possible to monitor the work space for a single steel bridge while obtaining different information for each section. [Explanation of symbols]

[0065] 1. Remote monitoring system for maintenance painting work on steel structures 10 sensors 15 Spatial Output Information 20 Field Office 30 servers 31 CPU section 32 Memory section 35 Display 40 network lines 50 ID tags 55 Worker output information 60 Mobile Devices K steel bridge S workspace

Claims

[Claim 1] A remote monitoring system for maintenance painting work on steel structures that monitors the working environment within a work space where workers perform the maintenance painting work, by shielding the areas of the steel structure to be painted from the outside to prevent dust and other particles generated during the maintenance painting work from scattering to the outside. a workspace information detection unit that acquires space information of the workspace; a main control unit that receives the spatial information acquired by the workspace information detection unit via a predetermined network line and generates predetermined spatial output information based on the received spatial information; an output terminal unit that outputs the content of the spatial output information generated by the main control unit in a predetermined format; Equipped with The system further includes a worker information detection unit carried by the worker, The worker information detection unit and acquiring position information of the worker based on the work space and worker information, which is information on the physical condition and / or movement of the worker, in association with information specific to the worker, The main control unit the control content is to receive the position information and worker information acquired by the worker information detection unit via a predetermined network line, and generate predetermined worker output information based on the received position information and worker information by associating it with information specific to the worker; The output terminal unit is The control unit outputs the contents of the worker output information generated by the main control unit in a predetermined format. A remote monitoring system for maintenance painting work on steel structures.

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