An underwater wireless communication device is an equipment in which a voice of a sender is transmitted to a receiver using ultrasonic waves in water. Generally underwater communication has been used for military purposes, but now it is also used for non-military purposes. Demand for underwater communication equipment has increased explosively due to the development of underwater work and leisure industry in particular. This trend is expected to increase with the development of IOT.
However, the industry related to the development of the tester has not yet been activated. Therefore, it is necessary to develop rapidly the maintenance equipment as well as the inspection equipment by coping with an increasing demand of water related equipments.
For safety and convenient communication, expensive underwater wireless communication devices has been sold quickly. Since the equipment has been sold in a short period of time, there are still few repair equipments, and it is difficult to repair because it is made in foreign countries. In addition, it is difficult to find the location of the fault, and there is a problem that the underwater equipment and the sensor must be inspected in water to check the operation. So, we have developed the tester and developed the equipment that can test the fault area on land.
The development inspector principle is that the voice transmitted through the microphone of the underwater wireless communication device is modulated and enters the developed tester. So, it is sent back to the equipment so that it can hear the sound of the microphone as it is output through the speaker. Then, the position of the fault can be grasped by the spectrum after the modulated signal.
The development tester includes a transmission/reception playback, a dummy for replacing the sensor, an automatic cooling for temperature and humidity control, and a display touch function for ease of use. And it is possible to inspect various kinds of underwater wireless communication devices by exposing AUX terminal to the outside.
In particular, as a inspection device developed as a military purposes, it is possible to perform all the tests such as operation state, overhaul and output inspection.
As a result of analyzing the performance of the developed tester, the waveform of the transmission signal and the reception signal were compared and analyzed using MATLAB. As a result, it was confirmed that it works well with the inspection machine through the various experiments.