Development of a “Smart” Dynamic Strain Measurement System for Turbine Engine Ground Testing

2009 ◽  
Author(s):  
Alton Reich ◽  
James Shaw ◽  
Andrew Nelius
Keyword(s):  
Data Storage ◽  
Measurement System ◽  
Strain Measurement ◽  
The United States ◽  
Dynamic Strain ◽  
Turbine Engine ◽  
Record Keeping ◽  
Ground Testing ◽  
Smart Transducer ◽  
Transducer Interface

The Arnold Engineering Development Center (AEDC) testing complex includes more than 50 wind tunnels, test cells, arc heaters, and other specialized test facilities. Of these, 27 units have capabilities that are unmatched in the United States, and 14 are unmatched in the world. These unique facilities pose equally unique testing challenges, including several related to test preparation. A dynamic strain measurement system is being developed for turbine engine ground testing applications. The system is being developed to be compatible with the IEEE-1451 Smart Transducer Interface Standard in order to enable “plug and play” test set up. This will help to minimize the time between the test article installation and completion of test preparations. It will also help to minimize “manual” record keeping associated with testing. The system will also utilize the IEEE-1588 precision time protocol to maintain sampling synchronization. This paper discusses the development of the system consisting of the Smart Transducer Interface Modules (STIMs), the network interfaces (NCAPs), and the system server for control and data storage. It also discusses initial testing and evaluation of the system.

On-Board Dynamic Strain System for Turbine Engine Ground Testing

2008 ◽  
Author(s):  
Alton Reich ◽  
Steve Doherty ◽  
James Shaw ◽  
Andrew E. Nelius ◽  
Keith Williams
Keyword(s):  
Phase 1 ◽  
The United States ◽  
Circuit Board ◽  
Digital Data ◽  
Dynamic Strain ◽  
Instrumentation Amplifier ◽  
Data Systems ◽  
Turbine Engine ◽  
Ground Testing ◽  
Ieee 1588

The Arnold Engineering Development Center (AEDC) testing complex includes more than 50 wind tunnels, test cells, arc heaters, and other specialized test facilities. Of these, 27 units have capabilities that are unmatched in the United States, and 14 are unmatched in the world. These unique facilities pose equally unique testing challenges, including several related to test preparation. A dynamic strain measurement system feasibility demonstrator for turbine engine ground testing applications was developed as the product of a Small Business Innovative Research (SBIR) phase 1 contract. System specifications include 40 kHz minimum bandwidth, 0–65°C operating temperature, IEEE-1451 (“smart sensor plug and play”) compliance, and synchronized sampling per IEEE-1588. The transducer interface for each channel features hardware-configurable bridge completion, an instrumentation amplifier, a remotely configurable antialiasing filter, and a combined A-D/microcontroller on a 5 square inch circuit board. The A-D/microcontroller stores essential transducer information locally and converts the amplified analog signal into digital data. The network interface from 12 transducer channels to the host computer comprises an FPGA and a microprocessor with integral IEEE-1588. Data systems of this type will reduce engine test cell wiring to control room, improve noise immunity, reduce engine installation time, enable faster calibration, and reduce per channel instrumentation cost.

A Wireless Strain Sensor Using Frequency Modulation Technique

2009 ◽  
Author(s):  
Hwan-Sik Yoon ◽  
Sanket K. Khedkar
Keyword(s):  
Frequency Modulation ◽  
Strain Gauge ◽  
Strain Measurement ◽  
Measurement Data ◽  
Strain Sensor ◽  
Vibration Measurement ◽  
Dynamic Strain ◽  
Turbine Engine ◽  
Cantilevered Beam ◽  
Remote Station

A compact wireless strain sensor using a Frequency Modulation (FM) technique is proposed. The sensor employs a conventional resistive strain gauge such that the resistance changes as the measured structure is mechanically strained. When the strain gauge is connected to a frequency modulation circuit, the change in the resistance appears as a frequency shift in the output signal that is transmitted wirelessly to a remote station. The received signal is then demodulated and the buried strain measurement data can be retrieved. Using this technique, a dynamic strain measurement is possible without any wire connection between the sensing point and the measurement equipment. This type of sensors have numerous applications in the strain or vibration measurement of moving or rotating structures such as fans on a turbine engine. The proposed concept of the wireless strain sensor is experimentally demonstrated by measuring vibration of a cantilevered beam with a wired transmission of the measurement data from the transmitter to the receiver.

Research and Implementation on Networked Smart Sensor Based on IEEE1451 Standard

2014 ◽  
Vol 8 (1) ◽  
pp. 492-500
Author(s):  
Hong Wang ◽  
Yue Zhou
Keyword(s):  
Data Sheet ◽  
Smart Sensor ◽  
Electronic Data ◽  
Interface Module ◽  
Design Idea ◽  
Application Processor ◽  
Smart Transducer ◽  
Transducer Interface

Firstly, the background and significance of IEEE1451 standard are introduced. Secondly, each protocol, especially the IEEE1451.2 standard of IEEE1451 family standards, is described respectively, including Smart Transducer Interface Module(STIM), Network Capable Application Processor (NCAP) and Transducer Electronic Data Sheet(TEDS). Then, a new design idea and implementation of a kind of networked smart sensor based on the IEEE451.2 is introduced in detail. Finally, the advantages and trends of the smart sensor based on IEEE1451 standard are summarized.

THE DEVELOPMENT OF ACCOUNTING AND INTERNAL CONTROL FOR THE NATIONAL LAND SYSTEM OF THE USA

1994 ◽  
Vol 21 (1) ◽  
pp. 189-213
Author(s):  
Michael P. Schoderbek
Keyword(s):  
United States ◽  
Internal Control ◽  
The United States ◽  
Record Keeping ◽  
Governmental Accounting ◽  
Land System ◽  
The Usa ◽  
And Control

This paper examines the early accounting practices that were used to administer the United States' national land system. These practices are of significance because they provide insights on early governmental accounting and they facilitated an orderly settlement of the western territories. The analysis focuses on the record-keeping and control practices that were developed to meet the provisions of the Land Act of 1800 and to account for land office transactions. These accounting procedures were extracted from the correspondence between the Department of the Treasury and the various land officers.

scholarly journals Medical Record Keeping in the Summer Camp Setting

2016 ◽  
Vol 07 (04) ◽  
pp. 1154-1167
Author(s):  
Jaycelyn Holland ◽  
Stuart Weinberg ◽  
S. Rosenbloom ◽  
Laura Kaufman
Keyword(s):  
Medical Record ◽  
Summer Camp ◽  
The United States ◽  
Summer Camps ◽  
Pediatric Care ◽  
Health Staff ◽  
Health Providers ◽  
Health Records ◽  
Record Keeping ◽  
Survey Responses

Summary Background Approximately one fifth of school-aged children spend a significant portion of their year at residential summer camp, and a growing number have chronic medical conditions. Camp health records are essential for safe, efficient care and for transitions between camp and home providers, yet little research exists regarding these systems. Objective To survey residential summer camps for children to determine how camps create, store, and use camper health records. To raise awareness in the informatics community of the issues experienced by health providers working in a special pediatric care setting. Methods We designed a web-based electronic survey concerning medical recordkeeping and healthcare practices at summer camps. 953 camps accredited by the American Camp Association received the survey. Responses were consolidated and evaluated for trends and conclusions. Results Of 953 camps contacted, 298 (31%) responded to the survey. Among respondents, 49.3% stated that there was no computer available at the health center, and 14.8% of camps stated that there was not any computer available to health staff at all. 41.1% of camps stated that internet access was not available. The most common complaints concerning recordkeeping practices were time burden, adequate completion, and consistency. Conclusions Summer camps in the United States make efforts to appropriately document healthcare given to campers, but inconsistency and inefficiency may be barriers to staff productivity, staff satisfaction, and quality of care. Survey responses suggest that the current methods used by camps to document healthcare cause limitations in consistency, efficiency, and communications between providers, camp staff, and parents. As of 2012, survey respondents articulated need for a standard software to document summer camp healthcare practices that accounts for camp-specific needs. Improvement may be achieved if documentation software offers the networking capability, simplicity, pediatrics-specific features, and avoidance of technical jargon. Citation: Kaufman L, Holland J, Weinberg S, Rosenbloom ST. Medical record keeping in the summer camp setting.

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