Chapter 1 Preview
1.1, Introduction
KOLIDA SDE-28S+ echo sounder is a kind of industrial control and digital echo sounder which is
integrated with the 12.1-inch TFT-LCD color screen, industrial control unit, echo sounding unit,
data processor, internal memory unit and kinds of interfaces and I/O devices. The special design
can protect it from dust, water, and strong vibration. It collects depth measurement, graphical
navigation, positioning data, water depth data acquisition together. All these features make the
instrument strong compatibility, stable performance and reliable accuracy. The machine comes
with a12.1-inch TFT-LCD color touch-screen which supports clearly visible under bright light. It
has a built-in operating system embedded WIN XP
,
which can connect to external keyboard,
mouse and other external USB devices. Dominant frequency of the CPU is 1.6GHZ with 2GB
internal memory and built-in 8GB SSD storage. SED-28S+ can connect to GPS from any
manufacturers for positioning, also the users can run different hydrographic surveying softwares
(support embedded Win XP version) on it. It is an ideal instrument for sea, river, or lake water
depth measurement together with the port, waterway dredging project.
1.2,
Echo Sounding Principles
The principle of echo sounder is to use ultrasound spread through dielectric, and on different
media surface produce reflective phenomenon, using ultrasonic transducer (probe) launches
ultrasound, and then measure delta-T between the emission wave and the reflected wave.
Acoustic propagation velocity in water is V, transducer (probe) transmits ultrasound, acoustic
emission by the probe to the bottom of the sea, reflected back by the bottom and received by the
transducer, then measure the round trip time the acoustic experienced by t, then: Z = Vt / 2; At
the same time, read the scale on the junction pole to get the value of the draft(draft is the value
between the water surface and the bottom of the transducer), as Fig.1-1.
Содержание SDE-28S
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