Laboratory Instruments
KOHAT Co., Ltd.
21 Dec 2025
(
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Features
This system is to survey the pavement surface distress level and condition, which are the main input for the network and the project level in PMS(Pavement Management System).
This system consists of 1) one investigation vehicle, 2) a set of investigation processing equipment, and 3) the High Speed Computer and Server computer for the data processing and reduction.
The investigation items should include a series of pavement surface distress survey, rut depth survey and International Roughness Index(IRI).
The system is Laser Camer and controller and Recording System in order to survey the pavement surface distress and rut depth and transverse vertical depth and each system included the software to reduce and analyze the data surveyed.
The investigation vehicle includes a series of pavement surface recorder system, transverse cross profile recorder system and a distance measuring instrument(DMI) and GPS and recorder system
The investigation vehicle can be operated at day and night without the controlled lighting system.
Specifications
1 Investigation Vehicle(Any model can be applied)
1) Vehicle(Typical model is presented as follows) 1 Set
Complete vehicle with the form admission or structure modification admission in compliance with Each nation vehicle control law and atmospheric environment and noise regulation.
- Weight : 5,130 Kg
- Dimension (LxWxH)mm : 5125 x 1920 x 2000
- Engine Displacement : 4000cc
- Hill-climbing ability (Tan θ : 25%)
- Interior space should be enough to mount the equipments required and floor finish with carpeting.
- One or Two entrance doors
- Air conditioning
- AM/FM Stereo Cassette and CD Player
- Insulation : Floor, Sides, Rear & roof
- Work table
- System rack
- Ladder access to roof
- Power Brake and power steering
- Storage Area
- Equipment Rack
- Revolving light
- Illuminated Sign Board
- Conference Room
2) Generator 1 Set
- 4 Cycle Gasoline or light oil engine
- Pressure Air Cooled
- 1 or 3 Phase, 5KW, 60Hz
- Industrial Muffler
- High Air Temperature Shutdown
- Air Discharge Duct Adaptor
3) Power Distribution Control Panel 1 Set
- Power Supply : AC 220V, DC24V, DC12V
- Output : Protected with NFB
- Power Supply on/off switch
- Adjustable Voltage(with Inverters)
4) Sensor boxes within front site of Back Tires 1 Set
2 Surface Distress Survey System
2.1 Laser Measurement Image System(LRIS)
1) Specification
- Image size : 4096 pixels/line, 28000 lines/s
- Image width : 4 m
- Laser Class : 3B
- Power : 250W
- Sensor size : 300mm(H) X 375 mm(L) X 200 mm(T)
- Sensor weight : 20kg
- Video Disk Recorder (VDR)
2) Distress Recording System
- Measuring width : 4.0m
- Measuring accuracy : Crack width 1mm
- Transverse Resolution : 1 mm
- Longitudinal resolution : 1 mm
- Maximum measuring speed : 100Km/h
3 Rut Depth Survey System
3.1 LRMS(Laser Rut Measurement System) Specifications
No. of laser profilers : 2
Sampling rate (max.) : 25 profiles/s
Exposure/Laser pulse duration : 0.01 -1.00 ms
Profiles spacing (at 100km/h) : 20 cm
Transverse resolution (max.) : 1280 points/profile
Tranverse field-of-view(nominal) : 4m
Depth range of operation : 750mm
Z-axis(depth) accuracy : 土1mm
X-axis (width) accuracy : 土1mm
Laser profiler dimensions (W X H X D) : 140mmX1052mmX305mm
Power consumption (max.) : 150 W at 120/240 VAC4 Data Processing & Analysis System
4.1 Pavement Distress & Rut Depth
Analysis System (Laser Camera image recording System & Multi-point displacement system(4m width with 25mm distance-160 points)
- Keyboard Inventory Facility
1 KVM Keyboard
Data Processing Software(KOHAT Crack Analysis Program)
Power Supply- ROW Measurements
Type which is capable of Saving Images with crack
250 GB HDD
Data Processing Software- Automated Crack Detection System
Which is capable of detecting Severity, Extent, Orientation
Which is capable of saving and printing the crack map.4.2 Surface Distress analysis software
Laser Camera Image recording System should provide following analysis software for the surface distresses.
1) Analysis Items
- Asphalt Pavement
- Fatigue Cracking
- Block Cracking
- Edge Cracking
- Longitudinal Cracking
- Transverse Cracking
2) Cracking analysis Items
- Crack length
- Distribution percentage of Cracking
5 GPS(Global Positioning System)
- KOHAT will provide GPS for position coordination for IRI(International Roughness Index) and Rut depth and Pavement distress image and Data Processing & Analysis System
- Compact GPS
Summary of Specifications
Classification | Specification |
Pavement
surface
distress
survey
system | Distress survey accuracy
(crack width) | Resolving Power = |
Transverse
coverage
width | F3.7 |
Type of camera | Laser Camera |
Number of camera | 2 |
Lighting system | Laser light |
Size of an image | Above width 3.7m and length 7.5m{about 4mX8m) |
Resolution of an image | All collected images shall be with same resolution.
Should detect cracks as small as 1mm at anytime day or night. |
Rut Depth
Measurement
System | Vertical Measurement
precision | Less than ±1mm |
Longitudinal sampling Interval | Less than 1m |
Transverse Sampling Interval | Less than 25mm |
Transverse coverage
width | More than 3.7m |
Maximum vertical
measurement depth | More than ±7.5cm |
Longitudinal
Profiling
System | Measurement
method | Inertia Non contact sensors Method |
Survey aocuracy | Less than 0.1mm |
Longitudinal
sampling Interval | Less than 25mm
(at 100km/h) |
Transverse sampling
number of profiles
per pass | 2 points |
Position
Confirming
System | Distance Measurement
Instrument (DMI) | Error Tolerance Below 0.5% |
Measurement Environment | Anytime day or night |
Measurement Speed
(Pavement surface distress survey,
rutting Measurement, Longitudinal Profiling
Measurement) | Max. 100km/h |
Chassis | Seating
(With All Measurement
System Installed) | More than 4 seat |
Maximum Speed
Fuel Tankage | Max. 100km/h
Diesel/Gasoline
More than 60? |
Engine Horsepower | More than 150HP |
Overall Length | More than 5,125mm in length(5125mm) |
Overall Width | More than 1,920mm in width(1920mm) |
Overall Height | More than 1,008mm in height(2000mm) |
Wheel Base | More than 3,200mm in distance |
Handle Position | Left-Hand |
Warning Lights | A unit, Yellow Color, 300candela(CD)
A rotating warming light(Rectangular shape) |
Remarks
One year warranty service will be provided.
technical training will be provided by manufacturer's qualified engineer.
Business area
- Road/Airport/Railroad/Harbor pavement/ Facilities management and Planning
- Pavement management system (PMS) and software development
- Railroad roadbed/ Harbor pavement management system development
- National road, City, County, Airport pavement management and vicarious execution
- Lecture and education for Road and Airport pavement engineers
- Planning and Research in test pavement of road and airport
- Consultation for pavement construction and design
- Evaluation of structure stability in railroad roadbed
- Laboratory and field test of various pavement materials
- Pavement structure evaluation using FWD
- Roughness measurement of pavement
- Skid resistance measurement of pavement
- Pavement distress condition survey
- Pavement survey equipment development
Our Client
- Nationwide cities, provinces and counties
- National road / highway management agencies
- Airport and port authorities and operators
- Military facility management units
- National railroad and local subway authorities
- Pavement construction or design companies
- Pavement material development & production companies
- Universities and Pavement relation laboratories
| Achievements & Performance - A study on asphalt pavement management system for Seoul Metropolitan City. (1999.11-2000.11)
- Development of PMS for Incheon International Airport.(2000.6-2000.12)
- A Initial Pavement Investigation in Incheon International Airport. (2001.3)
- A Project of Pavement Evaluation in Shinseon Container Wharf. (2001. 12)
- A Project of Pavement Skid Resistance Evaluation in Jungsuk Airport in Jeju Province. (2002. 6)
- A Project of Runway Stress-Strain Behavior Analysis in J617-03-2 Airport Construction. (2003. 11)
- A Pavement Investigation Project in Incheon International Airport. (2004. 12)
- A Pavement Investigation Project for Kimpo, Ulsan, Kunsan, and Sacheon Airport Runway in Korea Airport Corporation. (2005. 4)
- A Project on DB Development of Pavement Management System for Seoul Metropolitan City.(1st:2004.5-2005.5, 2nd:2006.9-2007.5)
- A Project on DB Development of Pavement Management System for Kyonggi Provice.(2005. 10)
- A Project of Pavement Evaluation in NeongSan-Gil Road for Pavement Extended Construction. (2006. 12)
- A Delivery for ROMA153 in Korea Airport Corporation. (2008. 12)
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