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tilt 姿态记录标记

DST tilt - subsea tilt logger with temperature & pressure sensors

Tilt (3D), temperature and pressure

Overview

Key features

Ideal for monitoring orientation of underwater gear or movements of marine animals

Available with an adjustable housing that keeps the logger fixed inside

Tilt measurements based on an accelerometer and measured in relation to earth's gravity

Option for burst measurements (5 recordings per second) for tilt & acceleration

Acceleration displayed in the supporting software together with tilt, temp & depth

Description

The subsea DST tilt sensor is a miniature data logger that measures and records temperature, depth (pressure) and tilt (in three directions) in relation to earth's gravity field. Tilt measuring range is +/-90° for each of the axis X, Y and Z. The tilt angle data are shown in degrees. Recorded data is stored in the logger‘s internal memory with a real-time clock reference for each measurement.

The DST tilt is supported by the SeaStar software and the Communication Box which serves as an interface between the logger and a PC. Communication between the logger and the Communication Box is wireless when sitting in the box.

In SeaStar, the user sets the start time, start date and sampling interval before starting the recorder. Up to seven different intervals can be set for the same measurement sequence. This is especially useful when more frequent measurements are needed at a certain time period. It is possible to have burst measurements for the tilt sensor where 5 measurements are recorded per second. 

With default programming depth, temperature, and tilt are recorded at the same time. Optionally TD (Temp-Depth) and tilt can be uncoupled, set as primary and secondary parameter pairs/parameters with different sampling frequency. That way memory partitioning can be customized according to individual preferences.

When the DST has been recovered, recorded data is uploaded to SeaStar where results are displayed both in graphic and tabular form. Since the tilt sensor is in fact an accelerometer the acceleration data are also displayed in the SeaStar software. Therefore both tilt angle data in degrees and acceleration data in m/s2 (meters per second per second) are shown.
After retrieving the data, the DST can be re-programmed and reused as long as the battery lasts.

A set of Communication Box and SeaStar software needs to be purchased with the first order.
For more information about accessories please click here.

Examples of Application

DST tilt is both used for analyzing movements and behavior of fish and marine animals as well as for studying various underwater gear. 

The DST tilt is suitable for various studies:

Fishing gear studies (trawl doors, nets, lines)

Tilt monitoring of fishing traps and cages

ROV and AUV orientation studies

Fish and marine animal tagging

Orientation of gethermal boreholes

Any other field where tilt angle monitoring is required

Accessories
Star-Oddi offers the Adjustable Housing for DST tilt, specially designed to immobalise the tilt sensor and protect the logger against impact. It has flexible mounting options, making it easier to attach to gears and cables. More details here. For external tagging of fish Star-Oddi can provide a special tag holder kit.

Sensors

Tilt (3-D), temperature, pressure*

Size (diameter x length)

15mm x 46mm

Housing material

Alumina (Ceramic)

Weight (in air/in water)

in air: 19g
in water: 12g

Memory type

Non-volatile EEPROM

Memory capacity

43,598 measurements per channel
(if all parameters are recorded simultaneously)

Memory capacity bytes

392,379 bytes / temperature-pressure 3 bytes, tilt 6 bytes

Memory management

- Custom programming
- Primary and secondary parameter

Data resolution

12 bits for TD, 15 bits for tilt

Temperature resolution

0.032°C (0.058°F)

Temperature accuracy

+/-0.1°C (0.18°F)

Tilt resolution

0.05°

Tilt accuracy

+/-3°

Temperature range

-1°C to +40°C (30°F to 104°F)***

Temperature response time

Time constant (63%) reached in 20 sec.

Standard depth ranges

0.1m-50m
0.1m-100m
1m-270m
5m-800m
5m-1500m
10m-3000m

Depth resolution

0.03% of selected range

Depth accuracy

+/-0.6% of selected range

Depth response time

Immediate

Data retention

25 years

Clock

Real time clock 
Accuracy +/-1 min/month

Sampling interval

User programmable

Number of different sampling intervals

1 to 7 different intervals within a measurement sequence

Communications

Communication Box, RS-232C 9 pin serial or USB

Attachment hole

0.9 mm (in diameter)

Tilt range

+/-90° (180° span)

Battery life

4 years**

* Pressure and temperature sensors optional.
** For sampling interval of 10 minutes; tilt, temperature and pressure recorded simultaneously.
*** Outside ranges available upon request.
Specifications may change without notice.

 

http://www.star-oddi.com/products/32/tilt-sensor/default.aspx

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