中央開発 List of Products and Services

Based on the past achievements of Gentaro, our company recommends setting three levels of management criteria (thresholds) based on the relationship between the inclination angle velocity and the remaining time until collapse.

• Measurement and analysis equipment leasing and rental
• Geological Survey Company
• maintenance

Monitoring was conducted using tilt sensors in a landslide area in southern India.

• Measurement and analysis equipment leasing and rental
• Geological Survey Company
• maintenance

Monitoring was conducted using tilt sensors in a landslide-prone area densely populated with residential buildings.

• Measurement and analysis equipment leasing and rental
• Geological Survey Company
• maintenance

Many of the national road slopes passing through mountainous areas in Bhutan are simply cut into the mountains, and the slopes themselves are unprotected. As a result, during heavy rains, slope collapses and falling rocks frequently occur, leading to reported human and material damage every year. In response to this situation, we are using remote monitoring of slope behavior with tilt sensors and rainfall measurements with rain gauges as one of the decision-making tools for implementing measures such as road closures.

• Measurement and analysis equipment leasing and rental
• Geological Survey Company
• maintenance

Monitoring was conducted using tilt sensors for the large-scale landslides distributed in Brisbane.

• Measurement and analysis equipment leasing and rental
• Geological Survey Company
• maintenance

The collaboration between industry, government, and academia aimed to support the formulation of evacuation action plans by residents and to encourage them to recognize it as their own issue. To achieve this, we utilized "LINE" to send out alert emails, promoting the evacuation actions of residents.

• Measurement and analysis equipment leasing and rental
• Geological Survey Company
• maintenance

Continuous opening cracks with good continuity were observed on the road surface, and significant extrusion deformation was noted on the embankment slope retaining wall. Monitoring was conducted on the embankment slope using inclination sensors, and three levels of management criteria were established. When each criterion was exceeded, corresponding countermeasures were considered, enabling safe and secure vehicle passage.

• Measurement and analysis equipment leasing and rental
• Geological Survey Company
• maintenance

During the heavy rain of the rainy season, the embankment in front of the residential property collapsed. To prevent further expansion of the collapse in areas that fall within the special warning zone for landslides, urgent slope stabilization work became necessary. Therefore, until the countermeasures are implemented, we monitored the ground behavior related to the expansion of the collapse using an inclination sensor.

• Measurement and analysis equipment leasing and rental
• Geological Survey Company
• maintenance

In the steep slope area within the special warning zone for landslides (commonly known as the red zone), deformation in the form of opening cracks has been observed in the foundation of residential land above the slope, and root bending has been noted in the trees within the slope. Therefore, while implementing slope countermeasure works, we have established a system for monitoring using tilt sensors, setting and operating management criteria values, and issuing alerts when those criteria values are exceeded.

• Measurement and analysis equipment leasing and rental
• Geological Survey Company
• maintenance

Due to heavy rainfall during the typhoon season, the slope facing the national highway collapsed. The national highway was blocked by the fallen earth, and since there were no detours available, it was necessary to urgently remove the debris and quickly reopen the road. Therefore, while monitoring the unstable earth that had not completely collapsed behind it using an inclination sensor, we set management criteria and conducted a conditional road reopening.

• Measurement and analysis equipment leasing and rental
• Geological Survey Company
• maintenance

In 2016, due to the Kumamoto earthquake, many stone walls within Kumamoto Castle collapsed; however, some did not completely collapse, and significant deformations such as bulging were observed. In response to this, monitoring was conducted on the stone walls where significant deformations were confirmed, using tilt sensors to understand the behavior of the stone walls during normal conditions and during earthquakes (abnormal conditions).

• Measurement and analysis equipment leasing and rental
• Geological Survey Company
• maintenance

In 2016, the Kumamoto earthquake occurred, causing the Aso Ohashi Bridge to collapse. During the restoration work on the Aso Ohashi Bridge and National Route 57, it was necessary to carry out the work quickly while ensuring the stability of the slopes. By monitoring the ground behavior with an inclination sensor, we were able to achieve the safe and secure completion of the construction.

• Measurement and analysis equipment leasing and rental
• Geological Survey Company
• maintenance

In conjunction with the ground improvement work for the facility's reconstruction, concerns arose regarding the impact on groundwater due to the presence of a drinking water well nearby. Therefore, four observation wells were installed to conduct real-time automatic monitoring of five parameters: turbidity, pH, electrical conductivity, water level, and water temperature at each well. For the water quality standard parameters of turbidity and pH, two levels of management criteria were established, and when these were exceeded, a monitoring system was put in place to send alarm emails to relevant parties. The equipment was designed to operate on solar panels and batteries, making it compact and eliminating the need for commercial power supply cables, thereby minimizing the impact on the construction area.

• Measurement and analysis equipment leasing and rental
• Water quality/pH measuring device
• Other analytical equipment

During the drilling operations on a slope where cracks and unstable rock masses are prevalent, we implemented real-time automatic monitoring using an inclination sensor (Kantaro) as part of the safety monitoring during the work. We installed the inclination sensor (Kantaro) on a steel plate fixed to the unstable rock mass with anchor bolts to monitor its behavior. We established three levels of management criteria, and a monitoring system was created to send alarm emails to relevant parties when these thresholds were exceeded. Since the movement of the unstable rock mass is expected to occur over a shorter time frame than slope deformation, we adopted cumulative inclination angle in addition to the usual slope monitoring using normal inclination angle velocity.

• Measurement and analysis equipment leasing and rental
• Geological Survey Company
• maintenance

With the newly reborn "Kantaro F-Alert," we can catch signs of landslide disasters and instantly communicate alerts regarding landslide disasters to relevant parties for the future.

• Measurement and analysis equipment leasing and rental
• Geological Survey Company
• maintenance

Predicting a landslide and making the decision to implement road closures and issue warnings to residents is not an easy task. And here, too, there was a municipal employee who had to make that decision, troubled by it. However, suddenly, something unexpected appeared...!?

• Measurement and analysis equipment leasing and rental
• Geological Survey Company
• maintenance

The "Monitoring Case Studies of the Impact on Railway Tracks" introduces examples of real-time monitoring of ground displacement at the surface and subsurface using the Observation King to ensure safe railway operations. The measuring instruments connected to the Observation King included a total station capable of measuring surface displacement and a "designed-type inclinometer" that can measure depth displacement both at the surface and deep underground. In areas where secondary disasters on slopes are a concern, real-time monitoring is required, making remote monitoring with the "designed-type inclinometer" effective and also cost-effective from the perspective of automatic observation. 【Features】 ■ Monitoring of subsurface using designed-type inclinometers ■ Proximity construction with railway tracks *For more details, please refer to the PDF document or feel free to contact us.

• Security cameras and surveillance systems

The "Monitoring Cases of Water Level and Water Quality" introduces construction examples conducted for safe tunnel construction in mountainous areas. We carried out groundwater level lowering work using the "Deep Well Method," and monitored the water level, pumping volume, and the water quality of the discharged groundwater. We also monitored the water levels of existing observation wells in the surrounding area. To eliminate cumbersome wiring work, we used "specific low-power wireless," achieving a reduction in work processes and costs. [Features] ■ Monitoring of groundwater levels and water quality ■ Reduction of work processes and costs through the use of wireless equipment *For more details, please refer to the PDF materials or feel free to contact us.

• Security cameras and surveillance systems

The case study titled "Monitoring Behavior of Steep Slope" is based on the Kumamoto earthquake that occurred in April 2016. To ensure a prompt emergency response to the rockfall on the national highway and to fully reopen the road, monitoring was conducted while implementing one-lane alternating traffic. The monitoring involved the installation of a "total station" on the opposite side of the collapsed slope, along with surveillance cameras positioned to provide a comprehensive view of the entire collapsed slope for real-time automatic monitoring. In steep slope areas, monitoring using a total station proved effective, allowing not only measurement data but also image verification, which enabled a cross-check to understand the behavior of the collapsed surface. [Features] ■ Response to sediment disasters caused by the Kumamoto earthquake ■ Monitoring of steep slopes using a total station *For more details, please refer to the PDF document or feel free to contact us.

• Security cameras and surveillance systems

The case study on "Monitoring the Behavior of Bridge Piers" introduces examples of real-time remote automatic monitoring of tilt angles at the top of bridge piers, river water level measurement, and monitoring using web cameras. As part of structural maintenance, the aim is to obtain foundational data for understanding the behavior of bridge piers on rivers in advance, which will aid in considering future facility renewal timing and renewal items. Kantaro is utilized not only in the field of slope disaster prevention but also in maintenance management areas such as stock management. 【Features】 ■ Stock Management ■ Monitoring the Behavior of Bridge Piers *For more details, please refer to the PDF document or feel free to contact us.

• Security cameras and surveillance systems

"Geo Safety Support" is a service that provides comprehensive support from ground consultant engineers. Using our system's landslide detection sensor "Kantarou" and the bidirectional remote automatic monitoring system "Observation King," experienced disaster prevention engineers accurately handle the installation of measuring equipment and respond to results on-site. Both "Kantarou" and "Observation King" are registered with NETIS and trademarked, so you can trust us with peace of mind due to the high external evaluations. 【Features】 ■ Registration and notification to relevant agencies for peace of mind ■ Increased reliability through external evaluations ■ The software (monitoring system "Observation King") can connect to various hardware ■ Approximately 7 years of experience and know-how ■ The hardware (measuring equipment "Kantarou") is affordable *For more details, please refer to the PDF materials or feel free to contact us.

• Security cameras and surveillance systems

The "Simple Surveillance Camera" is a surveillance camera that allows remote monitoring of a location via the internet. It does not have pan, tilt, or zoom functions, but it updates still image data (300,000 pixels) every 10 minutes. Past still image data can be viewed and stored on the server for one month. 【Features】 ■ Operable remotely ■ Can operate using solar panels and batteries ■ Usable in areas without commercial power, such as mountainous regions ■ Past image data can be viewed and stored on the server ■ Useful for managing ponds during disasters *For more details, please refer to the PDF document or feel free to contact us.

• Security cameras and surveillance systems

The "High-Performance Surveillance Camera" is a high-performance surveillance camera that allows remote control of local cameras via the internet. In addition to pan & tilt and zoom functions, it also enables ON/OFF control of the camera and adjustments to the image update speed (at 1-second intervals). By using it in conjunction with various measuring instruments, we provide a more realistic on-site observation. 【Features】 ■ Operable remotely ■ Power consumption control ■ Can operate with solar panels and batteries ■ Usable in locations without commercial power, such as mountainous areas *For more details, please refer to the PDF document or feel free to contact us.

• Security cameras and surveillance systems

This is an introduction to the business activities, joint research, and published papers of Chuo Development Co., Ltd. Our business achievements include "Disaster recovery design and other services for the No. 9 Ubara area," "Commissioned geological survey work for disaster recovery measures at the Aratozawa Dam," "Measurement management work related to the B2 series on the mountain side," and 7 other projects. Our joint research includes "Development of slope failure detection sensors for disaster warning and evacuation support," "Development of low-cost and quickly installable monitoring devices to prevent secondary damage from sediment disasters," "Research on the practical application of slope failure alarm systems in slope excavation work utilizing MEMS technology," and 2 other projects. Our published papers include "Development of a real-time alarm system on the internet for preventing heavy rain slope disasters in transportation networks," "Development of a low-cost and simple slope monitoring device for small slopes during heavy rain," "Development of a real-time slope hazard alarm system using internet two-way communication," and 19 other papers. For more details, please contact us or refer to our catalog.

• others

Monitoring of slopes such as steep inclines and landslide-prone areas, safety management during construction, remote monitoring of hard-to-access locations like snowy cold regions and underground mines, the K³-System (Observation King, Kan Taro, K Taro) caters to various monitoring targets and measurement purposes. As installation examples, we introduce six cases: "Automatic monitoring of landslides around dam reservoirs (2008-2009)," "Monitoring of landslide masses using total stations," "Continuous monitoring of slopes using 'Observation King' and 'Kan Taro'," "Slope monitoring from disaster occurrence to the start of recovery work," "Construction monitoring - safety monitoring related to cut slope construction (2010)," and "Water quality monitoring of nearby commercial wells associated with foundation pile construction (2009)." For more details, please contact us or refer to the catalog.

• Video Monitoring System
• Other security systems

When the construction of a structure's foundation reaches an aquifer, there are concerns about the impact on the water quality of nearby wells that draw from that aquifer. This is especially critical for commercial wells, which require delicate management and emergency response measures. Central Development Co., Ltd., as an expert in "soil" and "water," provides comprehensive support for groundwater quality monitoring, including real-time monitoring services, planning of observation well placements, setting management standards, and developing emergency response manuals. For more details, please contact us or refer to our catalog.

• Other security systems
• Civil Engineering Company
• Other civil engineering services

The cut slope method is designed based on the hardness and weathering degree of the ground, geological structure, groundwater conditions, etc., identified during preliminary investigations, as well as the excavation slope and countermeasures. However, due to partial differences in weathering and geological structure that cannot be fully grasped during the survey, slopes often deform and can ultimately lead to collapse. Therefore, it is necessary to quickly detect any deformation at an early stage during cut slope construction and take emergency measures. Chuo Development Co., Ltd. supports safe and economical safety management through comprehensive construction monitoring services, including the arrangement and measurement of flexible measuring instruments and remote automatic monitoring. For more details, please contact us or refer to our catalog.

• Other security systems
• Civil Engineering Company
• Other civil engineering services

When a disaster such as a landslide occurs on a slope along the road, even if the debris blocking the road is removed, the slope remains in a dangerous state with exposed earth, making it prone to secondary disasters until restoration work is completed. On the other hand, since vehicle passage is required as it serves as a regional artery, the temporary passage period until full restoration necessitates very high-level management. Chuo Development Co., Ltd. supports road management during disasters through comprehensive slope monitoring services, including monitoring with measuring instruments, real-time web distribution of data, alert email notifications, 24-hour surveillance, and slope inspections by technicians. For more details, please contact us or refer to our catalog.

• Dam construction
• Other civil engineering services
• Other Management Services

We are installing slope failure detection sensors called "Kantarou" in areas at risk of landslides, such as steep slopes, and conducting automatic monitoring of local conditions using "Observation King." This allows us to instantly capture changes in the slope, as well as achieve labor-saving and cost reduction through control of measuring instruments, such as changing the data sampling interval from remote locations and retrieving data from memory cards. For more details, please contact us or refer to the catalog.

• Other security systems
• Other civil engineering services
• Other Management Services

At the site of a large landslide triggered by an earthquake, the subsequent behavior of the landslide mass is being monitored using a total station connected to "Observation King." "Observation King" has a track record of connecting various measurement sensors. We select measurement sensors according to the local conditions and objectives, enabling continuous monitoring and real-time web broadcasting. For more details, please contact us or refer to the catalog.

• Other security systems
• Other civil engineering services
• Other Management Services

In the landslide block around the dam reservoir, we installed an inclinometer and a piezometer to understand the landslide behavior and groundwater level fluctuations during water storage. The data from the inclinometer and piezometer is transmitted in real-time via the "Observation King" for continuous monitoring of deformations. Chuo Development Co., Ltd. supports the selection of measurement instruments, layout planning, and the construction of automatic observation systems based on its extensive experience in landslide surveys, analysis, and dynamic observation. For more details, please contact us or refer to our catalog.

• Other security systems
• Civil Engineering Company
• Other civil engineering services

We have developed a simple multi-stage underground inclinometer "K-Tai" that monitors the behavior of soil and sediment deep underground, as opposed to conventional surface slope monitoring. It is designed to be installed quickly by a small team to prevent secondary disasters during sediment disaster recovery operations. When combined with the bidirectional remote automatic monitoring system "Observation King," it is possible to rapidly establish an automatic monitoring system for slopes. This is a joint development with the University of Tokyo, and we are currently conducting demonstration experiments. A patent application is in progress: Application No. 2010033031, Trademark Registration: Application No. 2011-001203. For more details, please contact us or refer to the catalog.

• Other security systems
• Other civil engineering services
• Other Management Services

Natural and artificial slopes gradually change due to factors such as loosening and sliding. "Kantarou" is an inclination sensor developed with the aim of capturing these changes. It can also be used for monitoring changes in objects other than slopes, such as unstable rock masses and structures. The measurements taken by "Kantarou" are often aimed at ensuring the safety of preservation targets located below the slope during construction work or in preparation for secondary disasters. It is registered as a NETIS technology. 【Features】 ■ Captures inclination changes of slopes, etc. ■ Usable for monitoring changes in objects other than slopes, such as unstable rock masses and structures ■ Ensures the safety of preservation targets located below the slope during construction work or in preparation for secondary disasters *For more details, please request materials or view the PDF data from the download.

• Other security systems
• Other civil engineering services
• Other Management Services

"The Observation King" automatically transmits data from local observation equipment to our monitoring server, where it is graphed and distributed via the internet, while also allowing remote control of the observation equipment. This is the base system for our proposed measurement, monitoring, and alert service, the "K3-System Case 3 System." [Features] ■ Bidirectional communication between observation stations and monitoring stations (Observation station: data communication, monitoring station: equipment control) ■ Direct control of local loggers from the monitoring station PC ■ Real-time data distribution and continuous monitoring ■ Data viewing via web browser ■ Proven connectivity with various measurement devices *For more details, please download the PDF or feel free to contact us.

• Dam construction
• Other civil engineering services
• Other Management Services

The "K³-System" enables remote automatic monitoring by visualizing observation data such as ground and groundwater measured on-site and distributing it in real-time to stakeholders. It aims to minimize damage from natural disasters and labor accidents related to the ground through alerts based on the judgment of our engineers, providing "Geo-Safety Support." 【Features】 ■ Public: Registration and notification to relevant agencies for peace of mind ■ Trust: Evaluated from the outside, enhancing reliability ■ Versatile: The software (monitoring system: Observation King) can connect to various hardware ■ Proven: Approximately 7 years of track record and know-how ■ Affordable: The hardware (measuring equipment: Kantaro) is inexpensive *For more details, please download the PDF or feel free to contact us.

• Other security systems
• Civil Engineering Company
• Other civil engineering services

Currently, surveillance cameras are being installed along major rivers, reflecting an increased awareness of disaster prevention in river management. Additionally, in terms of information disclosure, there is a demand for easy-to-understand display methods for water level markers for residents. The high-brightness phosphorescent water level marker is a groundbreaking device that, unlike the conventional reflective type, absorbs ultraviolet light to store energy and emits light, making the scale of the water level marker visible without the need for auxiliary light sources in unexpected situations, thereby ensuring a minimum safety line.

• Airport facilities
• River construction