The depth of the echo sounder is measured

Previously, people used a variety of ways to detect the sea depth, but the effect is not ideal, and there is an error. Now the most commonly used device for detecting the depth of the sea is the echo sounder.

So, how does the echo sounder measure the depth of the sea? The echo sounder is based on the principle of echo ranging. The transmitting transducer emits sound pulses downward from the sea, the acoustic pulses propagate down in the water, reflect when the submarine medium is different in density, and the reflected acoustic pulses propagate up in the sea and are received by the sea Received. According to the sound pulse in the sea between the time and its speed of sound in the sea, you can calculate the transducer to the sea straight line distance, that is, water depth. For example, at room temperature, the typical sound velocity in seawater is 1500 m / s. If the measured time of the acoustic pulse is 3 seconds in the water, the depth of the seawater is 2250 m. As the sound waves in the sea water propagation speed with the sea water temperature, salinity and pressure changes, so the calculation should be necessary to amend.

The main purpose

In special cases, the position can be identified by measuring the water depth

In the opening of new or shallow water navigation, can be used to navigate to ensure that the ship sailing

It provides accurate and reliable data on waterway and port measurements

The invention of the Echo Sounder provides a powerful means of measuring the depth of water for the majority of marine workers, since it can quickly and accurately measure continuous data of water depth when the vessel sails, so it will soon become the main instrument for water depth measurement, Now it has been widely used in waterway survey, underwater topographic survey, sea survey, vessel navigation and positioning and so on.

Today, the ocean terrain of all the understanding and understanding, are echo sounder of the credit. In the past, according to the number of small number of sea hammer test data, once thought that the world ocean is a flat land. The appearance of the echo sounder, only to make people eye open. Because the measurement results show that the ocean floor and the land as rugged, both mountains, there are deep valleys; both magnificent plateau, ups and downs of the hills, there are vast plains, terraces, thousands of forms, spectacular.