Pavement Test Equipment Trailer-Mounted Falling Weight Deflectometer Fwd

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  • Pavement Test Equipment Trailer-Mounted Falling Weight Deflectometer Fwd
  • Pavement Test Equipment Trailer-Mounted Falling Weight Deflectometer Fwd
  • Pavement Test Equipment Trailer-Mounted Falling Weight Deflectometer Fwd
  • Pavement Test Equipment Trailer-Mounted Falling Weight Deflectometer Fwd
  • Pavement Test Equipment Trailer-Mounted Falling Weight Deflectometer Fwd
  • Pavement Test Equipment Trailer-Mounted Falling Weight Deflectometer Fwd
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  • Overview
  • Standards
  • Introduction
  • Features
  • Technical Specifications
Overview

Basic Info.

Model NO.
JT-FWD01
Delivery Time
10-20 Working Days
Application
Pavement Deflection Test
PC Software
Yes
Loading Mode
Hydraulic
Transport Package
Wooden Tray
Specification
JT-FWD-01
Trademark
SEREV REAL
Origin
China
HS Code
9031809090
Production Capacity
100set/Year

Packaging & Delivery

Package Size
500.00cm * 160.00cm * 170.00cm
Package Gross Weight
600.000kg

Product Description

Standards

SHRP-LTPP AASHTO R32 FWD;JTG 3450-2019;T0953-2008; JTT1125-2017;JJG133-2017

 
Introduction

The Falling Weight Deflectometer (FWD for short) is a special equipment used to evaluate the bearing capacity of pavement. It starts the drop weight device through the computer-controlled hydraulic system, so that the drop weight of a certain mass falls freely from a certain height, and the impact force acts on the bearing plate and transmits it to the road surface, thereby imposing a pulse load on the road surface, resulting in instantaneous deformation of the road surface. Sensors at different distances from the measuring point detect the deformation of the surface of the structural layer, and the recording system transmits the signal to the computer, that is, the dynamic deflection and the deflection basin generated under the action of the dynamic load are measured.


Compared with the traditional Beckman beam measurement deflection, the drop-weight deflection is easy to use, fast, safe, labor-saving, simulates the actual situation to apply dynamic loads, and is suitable for long-distance and continuous measurement. After analysis and comparison, the US Federal Highway Administration confirmed that FWD is a better dynamic load assessment equipment for pavement bearing capacity, and selected FWD as an important equipment for pavement strength assessment in the implementation of SHRP plan.
Features

Easy to set up test parameters, the number of deflection drop weights, the weight lift height and the impact load can be set before the test, which is converted by the built-in load height relationship

The data acquisition software can display the current deflection and load curve of each drop weight in real time; later, the data processing software can be used to view the load and deflection time history curve of the effective drop weight
Hydraulically controlled mechanical locking device for safe detection


Constructions & structure
Falling weight system
The drop weight system is designed as an independent whole, which can flexibly adapt to various bearing chassis, including trailer chassis and vehicle chassis;
The transmission system consists of a hydraulic device, and the lifting and releasing of the mass block are completed by the hydraulic device;
Both sides of the bottom of the drop weight system are equipped with hydraulically controlled mechanical locking devices to ensure safe inspection.

Vehicle chassis
Due to the modular design of the vehicle-mounted drop weight deflectometer, the system can be adapted to be installed on a variety of vehicle chassis (pickup trucks, vans, commercial vehicles, etc.). vehicle needs.

Trailer chassis
 The load-carrying trailer of the trailer-type drop weight deflectometer adopts the chassis imported from Germany, and the structure is firm and stable.
 Adopt inertia mechanical braking system and rubber torsion bar independent suspension system, the braking is sensitive and reliable, and the driving is safe and stable
 Single-axis design, reducing turning radius, making U-turn more convenient
The ball hook is connected to the tractor, which is simple and reliable

Deflection sensors and test beams
Fully automatic drop weight deflectometer can provide customers with test beam multi-point (standard 9 points) and single-point measurement options
The deflection sensor adopts imported high-precision geophone (Geophone), which is consistent with other imported deflection instruments
Number of deflection sensors 1~23 (optional)

Test software
data acquisition software
Chinese and English operating software, friendly interface, used to create data save files, close data save files, test parameter settings, distance calibration, view or modify sensor parameters, easy to set parameters and sequence, display deflection curve and load curve.

Data analysis software
Provided users with data processing software in Chinese, which is convenient for users to organize and analyze the test data and issue test reports.

Main functions
Automatic import and export of collected data; data normalization;
Statistics and calculation of single point distribution represent deflection;
Calculate the Beckman beam conversion factor;
Joint load transfer evaluation, plate void evaluation, and modulus inverse calculation.
 
Technical Specifications

 

Braking device Equipped with inertia brake  
Traction device Standard trailer coupler with 50mm trailer ball  
Signaling device With steering, braking, reversing, width display combination lamps  
GPS function With GPS module (can detect positioning)  
Safety warning coating Equipped with eye-catching safety warning reflective signs  
Engineering lights Equipped with engineering lights  
Hammer lifting method Hydraulic lifting hammer  
Power supply Tractor charging system provided  
Deflection sensor range -3500um~+3500um  
Number of deflection sensors Standard 9, 1-23 optional  
Deflection test accuracy better than 2%  
Deflection resolution 0.1um  
Deflection repeatability The standard deviation of 40 test data at the same point is not more than 3μm  
Maximum load 120/150kN (upgradeable to 300kN)  
Load range 0~120/150kN  
Load accuracy 1%  
Load resolution 0.1kN or 1kPa  
Temperature range -50~100ºC  
The temperature measurement accuracy should be 0.5%  
Emergency lifting device Equipped with manual hydraulic lifting device  
Temperature resolution 0.1ºC  
DMI measurement accuracy 1%  
DMI resolution 0.1m  
Front distance display Real-time display of measuring point spacing  
Test time per point 15~20s  
Loading disk format 300mm diameter 4-point sector disc  
Laptop Windows7/XP operating system  
Software function Calculation with Beckman Beam Data Conversion System
Automatically find the best conversion data
Single point deflection distribution statistics
Calculation and data export representing deflection
data normalization
Evaluation of load transfer ability of joints
Evaluation of plate voids and analysis of stiffness composition
Automatically record the position station of each test point
Temperature correction possible
 
Walking speed 1~140Km/h  
Safety locking mechanism Equipped with safety locking mechanism  
Bearing method Carrier plate automatic locking mechanism  

Software pages
Pavement Test Equipment Trailer-Mounted Falling Weight Deflectometer FwdPavement Test Equipment Trailer-Mounted Falling Weight Deflectometer Fwd
Pavement Test Equipment Trailer-Mounted Falling Weight Deflectometer FwdPavement Test Equipment Trailer-Mounted Falling Weight Deflectometer FwdPavement Test Equipment Trailer-Mounted Falling Weight Deflectometer Fwd

 

 

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