What are the types of sensors that can be used to detect the presence fishes or objects at underwater?
- Sonar (Sound Navigation and Ranging):
- It is a Technique that can be used to communicate, Detect Objects or to navigate under the Surface of water.
- It is of Basically two Types:
- Active Sonar & Passive sonar. Sonars Basically works from Infrasonic to above a Megahertz frequency Range.
- 405 nanometer Blue Laser:
- You can use it too. But you need to use Epoxy Potting Compound to Waterproof the Module.
- For extended Coverage you can split the laser beam using a parallel prism and than can use Photodarlington as a sensing element. Mount the sensing element Close to the laser.
- You can put a Violet-blue gel filter too to improve the Selectivity.
- Laser+Sensor Combination approaches any reflective or dispersive Surface, The intensity of blue light incident on the phototransistor Increases.
Thanks!!!!!!!!
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