Model 428a Integrated Tilt, Heading, Depth, Temperature Sensor

Model 428

 

 

DESCRIPTION

FEATURES

APPLICATIONS

SPECIFICATIONS

O V E R V I E W

This unique sensor has been specially designed for underwater arrays and quasi-static mooring lines. The ocean ready sensor senses all the common utility parameters needed for determining the orientation of an underwater cable. The sensor uses a three axis solid state accelerometer for measuring total tilt and tilt direction. The total tilt angle measurement is computed internally from the total acceleration (which includes gravity) of the instrument relative to the length axis of the pressure vessel cylinder. A three axis solid state flux-gate magnetometer produces three axis field intensity measurement. This measurement, the tilt angle and tilt direction, is used to obtain an artificial horizontal plane for computing the magnetic x and y field intensity components. From these computed x and y magnetic field components, the heading of the sensor is computed. The difference between the sensor heading and the tilt direction is the sensor tilt direction. When the sensor is placed in parallel with the cable, it is the sensor tilt direction (in degrees with respect to magnetic North) that determines the direction of the cable.

Pressure Transducer

The sensor measures depth by use of a solid state pressure transducer. The scale and the offset of the pressure transducer can be set so the instruments outputs depth with any units (psi, meters, MPa, feet,....).

Temperature Transducer

Integral to the pressure transducer is solid state temperature transducer. This transducer is used to maintain calibration of the pressure transducer over temperature.



F E A T U R E S



A P P L I C A T I O N S

The PSI Integrated Tilt, Heading, Depth Sensor is intended for remote operation in ocean environments, primarily for determining the total tilt, direction of tilt and depth of moored cables. It has been designed to be placed over a sheave without undue difficulty. Typical applications include:

  • vertical and horizontal acoustic arrays
  • towed arrays
  • autonomous submersible vehicles
  • tow fish
  • buoys
  • shipboard control systems
Model 428

S P E C I F I C A T I O N S

MECHANICAL SPECIFICATIONS

Connector: Brantner AWL-4P-BC with locking sleeve
(other connector styles available)
Exterior Construction: 6061-t6 Aluminum, Hard Coat Anodized
Outside Length: 8.25 inches
Outside Diameter: 2.0 inches
Weight: 21 oz (600 g)
Survival Depth: 4500 meters
Operational Depth: 2000 meters


ELECTRICAL SPECIFICATIONS

Storage Temperature Range: C. to -40° to +70°C
Operating Temperature Range: C. to -20° +50°C
Voltage: 7 V. to 28 V. DC, unregulated, reverse bias protected
Power: 400 mW


SENSOR TYPES

Magnetic Detector: 3-Axis flux-gate sensor
Tilt Sensor: 3-Axis accelerometer
Depth Sensor: Silicon-based sealed strain gauge
Temperature: Solid state sensor
Operating Pitch, Roll, Yaw: 360° Continuous


ACCURACIES

Tilt: ±0.5° absolute, 0.1° relative
Heading: ±1° absolute, 0.5° relative
Depth: 0 to 2 Km (±l m absolute, 0.1 m relative)


OUTPUT DATA FORMAT

ACSII Data RS-232, RS-485, custom FM modulated, user selectable baud rates


BRANTNER AWL-4P-BC INTERFACE CONNECTOR PINOUT

Pin Number RS-232 Option RS-485 Option FM output
1 +V (7 to 24V) +V (7 to 24V) +V (7 to 24V)
2 Ground Ground Ground
3 RX (input) RS-485+ Out+
4 TX (output) RS-485- Out-


Go To:
Planning Systems, Inc. i-Ocean Home Page

OCEANTEC ELECTRONICS
1109 PECAN ST.
BASTROP, TX 78602
PHONE TOLL FREE 800/733-0221
FAX 866/861-9732

Updated: 6/28/06
OceanTec Electrics
Webmaster