Introduction
Page 3
© 2017 Valeport Ltd
1. Introduction
The Valeport miniSVS Sound Velocity Sensor has been designed with the objective of
providing high resolution, high accuracy sound velocity data in the most compact
package possible. The basic principle of Valeport’s Sound Velocity technology is “time
of flight”; that is to say, the sound velocity is calculated from the time taken for a single
pulse of sound to travel a known distance.
The miniSVS therefore consists of a single circuit board controlling all sampling, processing
and communications functions, and a sensor comprising a ceramic transducer, a signal
reflector, and spacer rods to control the path length. The two are connected by a single
coaxial cable. A titanium housing may be fitted, which provides waterproof protection
to a depth in excess of 6000m.
Optionally, a strain gauge pressure sensor may be added to the miniSVS, enabling sound
velocity profiles to be obtained. This configuration is used in the SoundBar 2 Digital Bar
Checker, where a 100 dBar range transducer is used, but the miniSVS may be fitted with
a selection of different range transducers up to 6000 dBar. The pressure option also uses
a secondary PCB.
As an alternative option, the miniSVS may be fitted with a PRT temperature sensor.
Note: the miniSVS may have either a pressure or temperature sensor fitted as an
option, but not both
