Description of conversion of an EG&G VMCM into a MVMS (multi-variable moored sensor)

Author

Maccio, Miguel ; Langdon, Christopher

Author_Institution

Lamont-Doherty Geol. Obs. of Columbia Univ., Palisades, NY, USA

fYear

1988

fDate

31 Oct-2 Nov 1988

Firstpage

1181

Abstract

A standard EG&G VMCM (vector measuring current meter) has been modified to acquire data from external sensors. The external sensors are mounted on a compact backpack which attaches to the VMCM´s cage. Some simple changes to the VMCM´s A/D (analog/digital) board opened up eight analog voltage channels. Changes to the VMCM´s firmware were made to allow control over the period of time between toggling external power on and the A/D sampling cycle. Some sensors with low power consumption were powered continuously and their signals passed through a low-pass filter to match time constants and minimize aliasing. Sixteen VMCMs were modified and three deployments of these MVMSs (multivariable moored sensors) were made in 1987 with durations of three to four months

Keywords

computerised instrumentation; data acquisition; geophysics computing; oceanographic equipment; EG&G; MVMS; VMCM; backpack; computerised instrumentation; data acquisition; external sensors; measurement equipment; multivariable moored sensor; ocean; vector measuring current meter; Bioluminescence; Biosensors; Conductivity; Current measurement; Energy consumption; Low pass filters; Matched filters; Measurement standards; Microprogramming; Optical sensors; Sampling methods; Sensor phenomena and characterization; Sensor systems; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

OCEANS '88. A Partnership of Marine Interests. Proceedings

Conference_Location

Baltimore, MD

Type

conf

DOI

10.1109/OCEANS.1988.23682

Filename

23682