Ship-mounted positioning device based on Beidou positioning and iridium communication

The invention relates to a ship-mounted positioning device based on Beidou positioning and iridium communication. The ship-mounted positioning device comprises a power circuit, a JTAG program downloading interface, a serial port debugging circuit, an iridium module satellite communication circuit, a leading double-mode satellite positioning circuit, a main control circuit and an externally-arranged interface circuit. The power circuit comprises a primary power source changeover chip IC1 and a secondary changeover chip IC2. The JTAG program downloading interface comprises a 2*5 connector assembly JTAG1. The serial port debugging circuit comprises a level changeover chip IC3. The iridium module satellite communication circuit comprises an iridium communication chip IC4. The leading double-mode satellite positioning circuit comprises a Beidou satellite positioning chip IC5. The ship-mounted positioning device can be carried on any ship system provided with a 12V external power source, real-time monitoring with global coverage can be achieved, the operational position and the operational speed of the ship system can be tracked, and the double-direction communication function, namely the function of sending an abnormal alarm or a remote alarming command, between the ship-mounted positioning device and a server can be achieved.