Gasbag Pavement Testing Apparatus Pneumatic Load Simulation
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Solution Overview
Problem
Conventional pavement accelerated loading testing apparatuses are complex, inefficient, consume high power, and generate noise due to their reliance on dead weights or hydraulic systems for simulating vehicle load on pavements.
Innovation Solution
A gasbag type pavement accelerated loading testing apparatus utilizing a pneumatic suspension frame system with gasbags, ventilated bolts, spokes, and an inflating valve to control rolling force, driven by an electromotor through a V-belt and reducer, allowing for precise simulation of vehicle load with reduced power consumption and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dead weight or hydraulic device is used to apply roll force, then the testing apparatus can simulate vehicle load on pavement, but the apparatus becomes complicated, consumes high power, and generates large noise
Solution Approach 1:
The patent replaces dead weight and hydraulic devices with a pneumatic system using gas bags to apply rolling force. The gas bags are inflated and deflated through a pneumatic suspension frame system, eliminating the need for complex mechanical dead weights or hydraulic machinery while maintaining the ability to simulate vehicle load on pavement
Solution Approach 2:
The patent substitutes mechanical dead weight systems and hydraulic devices with a pneumatic system. The gas bags, driven by air pressure control, replace the need for heavy mechanical counterweights or complex hydraulic actuators, thereby simplifying the apparatus structure while preserving simulation capability
2Reliability
If a dead weight or hydraulic device is used to apply roll force, then the testing apparatus can simulate vehicle load on pavement, but power consumption increases
Solution Approach 1:
The pneumatic system uses compressed air to inflate and deflate gas bags, which applies rolling force to the pavement. This approach consumes significantly less power compared to mechanical dead weight systems that require continuous energy input to maintain position or hydraulic systems that require pumps and motors
Solution Approach 2:
The pneumatic system allows the gas bags to store and release energy efficiently. When air is compressed into the gas bags, they store elastic potential energy that can be rapidly released to apply rolling force, eliminating the need for continuous external power input required by mechanical and hydraulic systems
3Reliability
If a dead weight or hydraulic device is used to apply roll force, then the testing apparatus can simulate vehicle load on pavement, but large noise is generated
Solution Approach 1:
The pneumatic system operates silently compared to mechanical dead weight systems that involve moving heavy parts and hydraulic systems that involve pumps and valves. The gas bags inflate and deflate smoothly without mechanical contact or fluid turbulence that would generate noise
Solution Approach 2:
By replacing mechanical and hydraulic systems with a pneumatic system, the patent eliminates the sources of noise associated with moving mechanical parts, hydraulic pumps, and heavy counterweights. The gas bags move air rather than mechanical components, resulting in minimal noise generation
4Productivity
If conventional roller devices are used, then pavement testing can be conducted, but testing efficiency is low
Solution Approach 1:
The patent employs a dynamic pneumatic suspension system where gas bags can be rapidly inflated and deflated to apply variable rolling forces. This dynamic capability allows the system to adapt to different testing requirements and accelerate the testing process compared to static conventional roller devices
Solution Approach 2:
The pneumatic system allows for rapid changes in rolling force parameters by adjusting air pressure in the gas bags. This enables the system to simulate various vehicle loads and testing conditions efficiently, improving testing productivity while maintaining relatively simple apparatus structure
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The gasbag type apparatus enhances testing efficiency and precision while reducing power consumption and noise, offering a simpler and more reliable method for simulating vehicle load on pavements.
Implementation Method 1
the air pressure of the system can be employed to control the rolling force that applied on the testing pavement by the rolling wheel
Implementation Method 2
a pneumatic suspension frame system which consisting of gasbags, ventilated bolts, spokes, an inflating valve, a communicating shaft and rockers
Implementation Method 3
the spokes are driven by an electromotor through a belt in shape of V and a reducer
Implementation Method 4
the rockers are hinge-jointed with the spokes
Data Source
AI summary
Disclosed is a gasbag type pavement testing apparatus, comprising a main frame (7), roller wheels (1) and a pneumatic suspension frame system which consists of gasbags (2), ventilated bolts (5), spokes (6), an inflating valve (10), a communicating shaft (11) and rockers (3). The gasbags (2), ventilated bolts (5), spokes (6), inflating valve (10), and communicating shaft (11) constitute an air storing space interconnecting each gasbag, the air storing space is inflated or deflated through the inflating valve (10), and the rockers (3) are hinge-jointed with the spokes (6). The spokes (6), rockers (3) and the communicating shaft (11) constitute a spoke assembly. The roller wheels (1) are driven by the spoke assembly to rotate round the communicating shaft (11), the roller wheels (1) contact the pavement in turn under the joint action of the gasbags (2) and the spoke assembly to simulate the practical situation and hence conduct the rolling test for the pavement. The testing apparatus performs the test with higher accuracy and higher efficiency.