Using Infrared Technology to Detect Hot Or Defective Brakes on Trucks PDF Download
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Author: DL. Richard
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Author: DL. Richard
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Author: D. L. Richard
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ISBN:
Category :
Languages : en
Pages : 72
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This study investigated the use of infrared thermometers to detect hot or defective brakes on trucks traveling through the eastbound Port Of Entry (POE) on I-70 in Dumont, CO. The objective of this evaluation was to develop brake temperature screening criteria that can be used to identify potential brake-related problems. Brake temperatures were measured and Level 4 brake inspections were performed on trucks traveling through the POE. The measured brake temperatures were then compared to the brake violation data contained in the brake inspection reports to correlate brake temperatures with brake functionality and to develop effective brake temperature screening criteria.
Author: Anne-Claire Christiaen
Publisher:
ISBN:
Category :
Languages : en
Pages : 40
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Author: Paul E. Green
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Category : Infrared imaging
Languages : en
Pages : 33
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The goal of this study was to use temperature measurements derived from infrared cameras to identify trucks with potential brake, tire, or hub defects. Data were collected at inspection sites on six different days and vehicles were subjected to CVSA inspections. Based on the inspections, axle ends were classified into three brake problem categories: yes, no, maybe. Subsequently, the data were analyzed in order to find associations between the temperature measurements and the brake problem classifications. Metrics were developed to identify outliers or large variation in temperatures within or between trucks. Many of the measures focus on differences between axles, left side and right side, and single outlying temperatures. The analysis is restricted to trucks with five axles. Various truck and environment variables were recorded. The maximum brake temperature was most closely associated with the brake problem variable. The coefficient of variation and standard deviation identified ten of the fourteen trucks classified with at least one brake problem correctly. In conjunction with other metrics, additional trucks with brake problems were also identified. Associations between trucks with single outlying temperatures on axle ends and brake problem classifications were not strong. However, it is possible that these outliers could be indicative of brake problems not captured by results produced from inspections.
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Category : Brakes
Languages : en
Pages : 4
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Category : Highway research
Languages : en
Pages : 64
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Author: Richard A. Miller
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Category :
Languages : en
Pages : 126
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Non-Destructive Evaluation (NDE) methods are being used in aerospace industry to inspect flaws and damages for various materials including composites. An NDE method which is capable of detecting defects in C/C composites was developed. This method employs transient infrared thermography. The methodology, experimental setup, and the tests performed on both CAFS-CVI C/C and commercial C/C composites are presented in this thesis. FEA modeling was used as a tool to refine measurements for the thermography system for a better understanding of the system. The modified flash thermography method, a unique method, was used. It combines both flash and step heating thermography methods into one by applying more heat than flash but at a shorter duration than step heating. Results show that drilled side hole defects with minimum size of 1.588mm in diameter at a depth of 1 to 2mm, and a maximum depth of 6 mm (12.7 mm in diameter) can be reasonably detected by this method. Blind hole defects with minimum size of 3.175mm in diameter at 2mm deep, and a maximum depth of 3mm (12.7mm in diameter) can also be detected. These results vary from types of C/C due to material make up and processing, as these affect the material properties. Based on the results, a unique transient thermography NDE method and setup to detect these defects in C/C composite materials costing $70k was developed. This system is capable of detecting relative subsurface defects in C/C composite materials in an efficient and economically feasible way.
Author:
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Category : Highway research
Languages : en
Pages : 344
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Category : Iron industry and trade
Languages : en
Pages : 770
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Author:
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ISBN:
Category :
Languages : en
Pages : 186
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Popular Science gives our readers the information and tools to improve their technology and their world. The core belief that Popular Science and our readers share: The future is going to be better, and science and technology are the driving forces that will help make it better.
