Patent
Method for detecting ultrasonic TOFD (time of flight diffraction) imaging of shaft pressing position
Zhan Hongqing,Fu Rulong,Zheng Weihe,Shaowu Zhou,Chen Wei,Xie Ning,Xu Guixi,Cai Yongxin,Zhu Pusheng +8 more
TLDR
In this article, a method for detecting ultrasonic TOFD (time of flight diffraction) imaging of a shaft pressing position is proposed, which is simple and easy to operate and applicable to detection of solid shaft workpieces.Abstract:
A method for detecting ultrasonic TOFD (time of flight diffraction) imaging of a shaft pressing position includes the following steps of firstly, mounting two probes and an encoder, disposing the two probes on two sides of the shaft pressing position respectively, utilizing one of the probes as a transmitting probe and the other as a receiving probe, attaching the transmitting probe and the receiving probe on the shaft surface and connecting the transmitting probe, the receiving probe and the encoder with corresponding ports of an ultrasonic TOFD imaging detector; and then starting the ultrasonic TOFD imaging detector to detect the shaft pressing position. During detecting, positions of the transmitting probe and the receiving probe are kept constant, a shaft rotates freely, the ultrasonic TOFD imaging detector records echo signals and position information thereof, and the echo signals are displayed in an image manner. The method for detecting ultrasonic TOFD imaging of the shaft pressing position can quickly, effectively and completely detect the shaft pressing position and is simple and easy to operate and applicable to detection of solid shaft workpieces, labor intensity is reduced and detecting efficiency is improved.read more
Citations
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Patent
Method for detecting internal defects of cable connector
TL;DR: In this paper, an ultrasonic probe is clung to the outer surface of the cable connector, and the probe is transmitted into the cable and receives a returned ultrasonic reflection signal, and whether a time difference between transmission of the ultrasonic signal and receiving of the returned signal is consistent with a preset time difference or not is obtained through calculation, so that whether the internal defects exist in the cable connectors or not can be judged.
Patent
Hoist spindle crack online monitoring system and working method thereof
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TL;DR: In this article, a Hoist spindle crack online monitoring system and a working method thereof is described. But the authors do not reveal the working method of such a system and do not discuss its performance.
Patent
Accurate quantitative method for inclined cracks of thick-wall pipelines based on time of fight diffraction (TOFD) circumferential scanning images
TL;DR: In this paper, an accurate quantitative method for inclined cracks of thick-wall pipelines based on time of fight diffraction (TOFD) circumferential scanning images, and belongs to the technical field of nondestructive testing.
Patent
System and method for inspecting flange connections
Manuel Kenneth Bueno,Robert M. Roney,Willis James Perry,Robert Charles Shaffer,Richard Michael Hatley +4 more
TL;DR: In this paper, a probe assembly is configured to inspect components of an assembled flange connection when the probe assembly assembly is disposed within a bore of the components, and one or more encoders are coupled to the shaft and are configured to determine a position of the probe relative to a reference point.
Patent
Separator plate main welding line detection system and method
Ji Changguo,Liu Jianping,Jiang Nan,Ma Yanhui,Guo Derui,Mao Liangyan,Yin Jianfeng,Liu Yongchao +7 more
TL;DR: In this article, a separator plate main welding line detection system and method is presented, which comprises a main frame, a driving mechanism which can drive the main frame to freely move, a curvature adjustment rotation shaft which is hinged to the mainframe, a detection module which is connected to the curvature adjusting rotation shaft and comprises a wedge block with a curved work surface having curvature the same to curvature of separator plates to be detected and a linear array A probe tightly pressing against the wedge block, and a position recording device which is arranged on the driving mechanism
References
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Patent
Helical soldering seam manual checking machine
Guangwen Liu,Wang Yuqin,Lijian Zhou,Zhu Zidong,Qingshan Feng,Daqing Chen,Wensheng Huang,Wang Weibin +7 more
TL;DR: In this article, a spiral weld manual scanner walking on pipelines is used for detecting spiral welds of steel pipelines on service with phased array combined with TOFD ultrasonic, which is used to detect spiral weld on pipelines.
Patent
Configurations and methods for ultrasonic time of flight diffraction analysis
Barry Messer,Matthew Yarmuch +1 more
TL;DR: In this article, a low-absorption housing that at least partially encloses an ultrasound transducer is used to detect lack-of-fusion defects in polymeric pipes.
Patent
Portable multi-channel TOFD detection device
TL;DR: In this paper, a portable multi-channel TOFD (time of flight diffraction method) detection device is presented, which consists of a multichannel ultrasonic testing device, a multichannel signal transmission cable, a multiple-channel scanner, a standard test block with a thickness of 200mm, a probe scanning position information encoder, a TOFD probe and clamping device, and a double K value combined probe.
Patent
Inspecting apparatus of phased array supersonic wave for axile of train
TL;DR: In this article, a phase-array-typed ultrasonic detection device of the wheel and axle of a railway vehicle is provided to prevent the wrong reading due to oil by eliminating the oil from the lower part of the wheels and axle in detection.
Patent
Life measuring device for mechanical seal
TL;DR: In this paper, projected rings on the outer circumference of a rotating ring are used to measure the life of a turning-shaft bearing, and the displacement of the projected rings can be detected by ultrasonic detectors from the outside of a shaft-sealing chamber.