Providing the Ultimate Solutions in Precision Displacement Sensors
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Aircraft Component Measurement, DIN and Lemo Connectors |
Position Measurement & Control - Issue 37
APPLICATION FOCUSLinear and Angular Position Measurement of Aircraft Components During Flight Test Document Addresses Selection Criteria, Technolologies, and Implementation Tips
Figure A1 - Labor-intensive gear coupling method involves custom-design drive chain, two sprockets, associated mounting hardware, and rotary sensor. Firstmark Controls products have been used for over 35 years to measure a variety of aircraft components including:
Recently we became aware of "Linear and Angular Position Measurement of Aircraft Components" that gives novice and expert users a framework in which to make position measurement systems for aircraft components. Produced by the Advisory Group for Aerospace Research and Development, this document provides information on determining what technologies to consider and how to perform the actual measurement. The publication starts by discussing the most important factors to consider when selecting a position measurement solution:
Figure A2 - Various methods to measure the motion of aircraft components.
Figure A3 - Flexible, easy-to-use, reliable alternatives to the methods shown in Figures A1 and A2. While the material was published in 1977 and the print quality of the document is lacking, its content is generally quite useful. It does not specifically address cable-actuated devices (news travelled slow in the 1970s) and its coverage of potentiometer technology has been obsoleted by technology improvements. The document limits its focus to potentiometric, inductive, synchro, and digital technologies. Keep in mind that Firstmark Controls position transducers are capable of integrating these types of rotary sensors:
Figure A1 and A2 image credits: Advisory Group for Aerospace Research and Development Related Links:
PRODUCT FOCUSDIN 45326 and Lemo Connectors Broaden Appeal of Series 6 Position Transducers More Plug-Compatible Solutions Now Available The Series 6 miniature position transducers offer a number of benefits including:
To these benefits we now add broader plug-compatibility. Adding to the existing MIL-C-5015 and flying lead electrical termination options, the Series 6 products are now available with DIN 45326 and Lemo connector options. When ordered with these options, mating connectors are also provided.
Figure B1 - Series 6 drawing showing Lemo (Code 3) and DIN 45326 (Code 4) electrical connectors. If you have a an electrical termination requirement not met by the MIL-C-5015, DIN 45326, Lemo, and flying leads options, request a Custom Solution. CUSTOMER FOCUSPortable Patient Training Device for Lung Cancer Treatment Series 173 Measures Patient Chest Deflection 4-D tomotherapy treatment (Tomotherapy) outcomes for lung cancer depend on the stability and repeatability of a patient’s breathing pattern. The University of Wisconsin recently developed a portable patient training system that allows more practice for the patients. This device incorporates a Firstmark Controls Series 173 position transducer to measure the patient's chest deflection. The portable device measures a patient’s breathing pattern and a portable pocket PC displays the guiding cycles and provides feedback on the patient’s current breathing curve.
Figure C1 - Chest strap with 2.5 inches of slack and elastic band connected to the Series 173 position transducer cable. Connected from the bottom of the box to the strap is an elastic strap to provide adequate tension in the chest strap.
Figure C2 - The tomotherapy machine that accounts for patient breathing. Photo credit: TomoTherapy Incorporated. Related Links: NEWS YOU CAN USEPrevious Issue (Issue 36)
ISSN 1527-5108 • Document Number S050W(040719) |
