Main Title |
Multidirectional turbulence probe development : Phase I. Unidirectional turbulence sensor development / |
Author |
Atterbury, Thomas.
|
Other Authors |
|
CORP Author |
Battelle Memorial Institute. Columbus Laboratories, |
Publisher |
United States Environmental Protection Agency, Water Quality Office, |
Year Published |
1971 |
Report Number |
EPA16050-DOW-10/71; W7212453 |
OCLC Number |
00679334 |
Subjects |
Hydraulic engineering--Instruments ;
Water--Pollution--Research
|
Internet Access |
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
EJBD |
EPA 16050-DOW-10-71 |
|
Headquarters Library/Washington,DC |
04/21/2014 |
ELBD ARCHIVE |
EPA 16050-DOW-10-71 |
Received from HQ |
AWBERC Library/Cincinnati,OH |
10/04/2023 |
ELBD RPS |
EPA 16050-DOW-10-71 |
repository copy |
AWBERC Library/Cincinnati,OH |
10/17/2014 |
|
Collation |
vi, 61 pages : illustrations, charts, plans ; 28 cm |
Notes |
"October, 1971." -- Title page Sponsored by the Environmental Protection Agency Contract Number: 14-12-827 |
Contents Notes |
Development of a unidirectional-turbulence probe was undertaken to investigate the feasibility of a small-diameter strain-gaged diaphragm-type pressure transducer and a self-adjusting depth compensation air reservoir for use in the follow-on development of a small (1/2-inch diameter) multidirectional-turbulence probe. A unidirectional probe was developed which is capable of monitoring water velocities over a range of 0.5 to 5 ft/sec in turbulence frequencies of 0 to over 100 Hertz and which will automatically operate in water up to 10-feet deep. Sealing inadequacies in both the air reservoir membrane and the pressure diaphragm permit moisture entry into the air volume covering the strain gages. This has given rise to balance drift and circuitry ground problems that have resulted in the placing of limitations on the water exposure and turbulence monitoring times for the unidirectional probe. These problems also suggested that the concepts cannot be immediately incorporated into a multidirectional probe design. |