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Article
Publication date: 13 June 2019

Rui Zhang, Lei Zhao, Dan Xie, Jinlong Song, Wendong Zhang, Lihu Pan and Yanhua Zhang

This study aims to simulate and test the performance of a transmitting and receiving capacitive micro-machined ultrasonic transducer (CMUT). Aimed at detecting demand of…

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115

Abstract

Purpose

This study aims to simulate and test the performance of a transmitting and receiving capacitive micro-machined ultrasonic transducer (CMUT). Aimed at detecting demand of the CMUT, a matched integrated adjustment circuit was designed through analyzing processing methods of transducer’s weak echo signal.

Design/methodology/approach

Based on the analysis of CMUT array structure and work principle, the CMUT units are designed and the dynamic performance analysis of SIMULINK is given according to the demand of underwater detecting. A transceiver isolation circuit is used to make transmission mode and receiving mode separate. A detection circuit is designed based on the transimpedance amplifier to achieve extraction of high-frequency and weak signal.

Findings

Through experimentation, the effectiveness of the CMUT performance simulation and the transceiver integrated adjustment circuit were verified. In addition, the test showed that CMUT with 400 kHz frequency has wider bandwidth and better dynamic characteristics than other similar transducers.

Originality/value

This paper provides a theoretical basis and design reference for the development and application of CMUT technology.

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Article
Publication date: 1 September 2004

Donal Heffernan and Paula Doyle

In industrial distributed control environments for automation technology, Ethernet network based solutions are gaining prominence in the traditional fieldbus application…

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1024

Abstract

In industrial distributed control environments for automation technology, Ethernet network based solutions are gaining prominence in the traditional fieldbus application areas with the promise of standardised solutions that can support real‐time operation to a resolution of less than 1 μm. However, there are no formal standards for a real‐time Industrial Ethernet. This paper looks at some of the emerging de facto solutions and describes a novel project where clusters of real‐time transducer networks are developed and the control is tightly synchronised using the IEEE 1588 clock synchronisation standard, realising a “Time‐triggered Ethernet” solution.

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Assembly Automation, vol. 24 no. 3
Type: Research Article
ISSN: 0144-5154

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Article
Publication date: 24 December 2020

Shubham Tripathi and Manish Gupta

Procurement is a crucial part of supply chain management, consistently becoming a strategic vantage point in global competition. The industry 4.0 paradigm is transforming…

Abstract

Purpose

Procurement is a crucial part of supply chain management, consistently becoming a strategic vantage point in global competition. The industry 4.0 paradigm is transforming supply chains to smarter systems, giving rise to the concept of procurement 4.0. A systematic framework to transform in current scenario is crucial.

Design/methodology/approach

This study brings together these current researches to propose a redesigned procurement process by combining several technologies. A BPR approach is taken to present the new process and its merits are discussed.

Findings

A re-designed procurement framework is proposed. Radical improvements of cost, cycle time, human effort, degree of automation, traceability, information availability and uncertainty are achievable with the proposed framework.

Practical implications

The proposed re-engineered process addresses the visualization barrier for managers. The proposed framework is grounded on BPR which provides a generic ground for developing redesign exercise along with the visualization of new process.

Originality/value

There is literature discussing implementation, impact and advantages of individual and combination of technologies on procurement process but lacks visualization of the transformed process combining these technologies.

Details

Business Process Management Journal, vol. 27 no. 2
Type: Research Article
ISSN: 1463-7154

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Article
Publication date: 1 January 1992

Mark Howarth

HART stands for Highway Addressable Remote Transducer and refers to the protocol (basically the signalling method, message structure and transaction rules) used for…

Abstract

HART stands for Highway Addressable Remote Transducer and refers to the protocol (basically the signalling method, message structure and transaction rules) used for digital communication amongst “smart” process instruments and their control room counterparts. But why a special protocol for the process field?

Details

Assembly Automation, vol. 12 no. 1
Type: Research Article
ISSN: 0144-5154

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Article
Publication date: 1 April 1980

A.D. Willis

Since this paper was first presented at the International Symposium of Corrosion and Protection Offshore in Paris, May 1979, Wilson Walton International report that their…

Abstract

Since this paper was first presented at the International Symposium of Corrosion and Protection Offshore in Paris, May 1979, Wilson Walton International report that their system for remote monitoring of offshore structures and pipelines is the only one of its type in use in the North Sea area. They add that six major oil companies have now ordered this type for North Sea jackets.

Details

Anti-Corrosion Methods and Materials, vol. 27 no. 4
Type: Research Article
ISSN: 0003-5599

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Article
Publication date: 1 March 1992

Om P. Kharbanda and Ernest A. Stallworthy

In the continuing endeavour to work towards ever better management,experience plays a crucial role. We learn from success, but we can learnmuch more from failure. Further…

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1905

Abstract

In the continuing endeavour to work towards ever better management, experience plays a crucial role. We learn from success, but we can learn much more from failure. Further, it is far better and cheaper when we learn from other people′s failures rather than our own. This monograph assesses the requirements of project management in relation to industrial projects, illustrating the factors that can result in failure by means of a series of case studies of completed and abandoned projects worldwide that have failed in one way or another. The key roles played by project planning and project cost control in meeting and overcoming the practical problems in the management of industrial projects are examined in detail. In conclusion the lessons that can be learned are evaluated and presented, so that we may listen and learn – if only we will.

Details

Industrial Management & Data Systems, vol. 92 no. 3
Type: Research Article
ISSN: 0263-5577

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Article
Publication date: 1 December 1990

THE future of carbon fibre laminates in high‐tech industries such as aerospace receives a substantial boost by the development of an advanced 10‐axis computer controlled…

Abstract

THE future of carbon fibre laminates in high‐tech industries such as aerospace receives a substantial boost by the development of an advanced 10‐axis computer controlled ultra‐sonic scanning machine designed and manufactured by the UK metrology specialist LK Ltd.

Details

Aircraft Engineering and Aerospace Technology, vol. 62 no. 12
Type: Research Article
ISSN: 0002-2667

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Article
Publication date: 1 August 1969

T.E. Ford

THE guidance aid installed at most of the world's major airports is the Instrument Landing System which is currently being developed to cater for all phases of all weather…

Abstract

THE guidance aid installed at most of the world's major airports is the Instrument Landing System which is currently being developed to cater for all phases of all weather landing programmes. For this application, the system has to achieve a guaranteed performance of less than one failure in ten million landings, thus inferring high equipment reliability and integrity. The VHF ground system at present installed consists of a localiser to provide azimuth guidance, a glide path transmitter to provide pitch guidance and marker beacons to give position information at distances of about 5 miles and one mile from touchdown. The guidance signals are formed by modulating two overlapping beams of different frequencies such that when the aircraft is on the extension of the runway centre line, equal modulations are received. This is termed zero difference in depth of modulation contour. The glide path signal is formed in a similar way with the zero contour defining a descent path angle of 3 degrees to the runway touchdown point. In the aircraft, the ILS receivers separate the demodulated tones by filters, and they are then rectified and compared differentially.

Details

Aircraft Engineering and Aerospace Technology, vol. 41 no. 8
Type: Research Article
ISSN: 0002-2667

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Article
Publication date: 1 December 2000

P.J.H. Harris, B.A. Swain and K.P. Webb

Looks at an aircraft engine manufacturer’s use of an electronic system to enhance an existing product. During the early 1990s Rolls‐Royce studied the changing military…

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2311

Abstract

Looks at an aircraft engine manufacturer’s use of an electronic system to enhance an existing product. During the early 1990s Rolls‐Royce studied the changing military market and compared its range of engines with potential business opportunities. The trainer/light combat powerplant was one area where there was potential to develop its position. As a result of the continuing success of the BAe Hawk and Boeing Goshawk aircraft and the expectation of new sales well into the next century, the decision was taken to launch a new version of the Adour engine. Thus in 1996 Rolls‐Royce launched the Adour 900, based on the current, well‐proven Mark 871, but offering thrust growth, improved life cycle costs and enhanced functionality. Central to the concept of the Adour 900 is a new Full Authority Digital Engine Controller with integrated Engine Health Monitoring. Examines the features of the FADEC and EHM System, showing how they have been tailored to meet the needs of a modern trainer aircraft without sacrificing retrofit capability. Attention is also given to the development process which had to ensure the demanding design targets were met within the cost and timescale constraints.

Details

Aircraft Engineering and Aerospace Technology, vol. 72 no. 6
Type: Research Article
ISSN: 0002-2667

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Article
Publication date: 1 April 1997

Lars Skyttner

Distress signalling according to generally accepted methods and codes has always been the main reason for human survival in sea disasters. Examines the origin of this type…

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290

Abstract

Distress signalling according to generally accepted methods and codes has always been the main reason for human survival in sea disasters. Examines the origin of this type of communication and its connection to natural senses and channels together with the alphabets, codes and special distress signals used at sea. Reviews the evolution and transformation of the old channels through the introduction of electronic communication, and the opening of some entirely new channels. Compares the different distress channels and makes some proposals concerning new distress signals.

Details

Kybernetes, vol. 26 no. 3
Type: Research Article
ISSN: 0368-492X

Keywords

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