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Design Concept for a Transducer Holding System

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Design Concept for a Transducer Holding System Suitable for use with the Ohmic Instruments Model UPDM-DT-1E Radiation Force Balance. Craig E. Nelson - Consultant Engineer. Ohmic Instruments Model UPDM-DT-1E. Strengths Relatively sensitive Reasonable dynamic range Modest cost.

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Presentation Transcript
slide1

Design Concept

for a

Transducer Holding System

Suitable for use with the Ohmic Instruments Model UPDM-DT-1E

Radiation Force Balance

Craig E. Nelson - Consultant Engineer

slide2

Ohmic Instruments Model UPDM-DT-1E

  • Strengths
  • Relatively sensitive
  • Reasonable dynamic range
  • Modest cost
  • Weaknesses
  • Various useful force sensing targets are not available
  • Various useful measurement chambers are not available
  • A stream guard is not available
  • A variety of transducer holding devices are not available
  • The installed transducer support post is not adequate for precision
  • Acoustic measurements such as hydrophone calibration
slide3

Ohmic Instruments Model UPDM-DT-1E

  • Upgrade Components and Features Required for Hydrophone Calibrations Work
  • Transducer Holding Assembly
  • a. Adjustable with Precision
  • b. Versatile
  • c. Robust
  • d. Semi-permanent Lockdown features
  • Stream Guard Assembly
  • a. Easily installable and Removable
  • b. Useable with a variety of Source Transducers
  • Convenient Features
  • a. All Parts and Pieces to be Stowed Inside the UPDM Storage Case
  • b. No modification to the UPDM-DT-1E should be required
slide4

Ohmic Instruments Radiation Force Balance

Proposed Transducer Measuring Devices

Overview

slide6

Original Accessory Support Post is Retained

Mounts with Existing Screw Holes

¾ Top View – Thumb Nuts and Other Hardware Are Not Shown

slide7

Robust and Flexible Jigging Setup

¾ Side View – Thumb Nuts and Other Hardware Are Not Shown

slide8

Jigging Locks Down Rigidly

Sound Field is Illustrated

Cutaway Side View – Thumb Nuts and Other Hardware Are Not Shown

slide9

Cutout for Force Target Support Bracket

“Upgrade Kit” fits within the original platform envelope

More Jigging can be installed on this side

Top View – Thumb Nuts and Other Hardware Are Not Shown

slide10

Ohmic Instruments Radiation Force Balance

Proposed Transducer Measuring Devices

Individual Components

slide13

Panasonic Model V318 Sound Field

Force Sensing Cone – Panasonic Model V318 Source Transducer with Sound Field (in yellow)

slide14

Black Rubber Sound Absorber on Sides and Bottom

Deep Drawn Steel Shell

Measurement Chamber - Standard Issue

slide15

Lower Rail

Both rails have the same cross section

Upper Rail

slide16

Upper Carriage

Stainless Steel 1/2 in

Diameter Support Rods

Both rails have the same cross section

Lower Carriage Assembly

Thumb Nuts and Other Hardware Are Not Shown

slide17

Upper Cross Bar

Thumb Nuts and Other Hardware

Are Not Shown

Panasonic Model V318 Transducer Holder (Two Parts)

slide18

Summary

  • The Ohmic Instruments Ohmic Instruments model UPDM-DT-1E requires enhancement in order to be effectively used for hydrophone calibration and other QA related tasks
  • A set of components has been designed to substantially enhance the UPDM-DT-1E capabilities
  • The proposed “upgrade kit” will allow accurate hydrophone calibrations to be performed
  • The proposed “kit” can be easily modified or adjusted to allow a variety of useful quality assurance tasks
  • A lesser level of upgrade will not suffice for the intended purposes
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