Abstract
This letter improves the Personal Location Beacon( PLB), designs and
implements a prototype personal maritime emergency radio beacon. Unlike
the existing PLB, it is compatible with the traditional global search
and rescue system( COSPAS-SARSAT) and BeiDou search and rescue system,
the vital signs of people monitoring and reporting functions. After the
PLB transmits distress information, the Beidou receiver works. The
Beidou receiver receives information from the Rescue Centre and controls
whether the PLB transmits the distress information again, reducing
unnecessary emissions, thereby reducing the average power consumption of
the PLB and extending the working time of the PLB. Measurements show
that the current is 79mA in the state of receiving Beidou information,
and the 7000mAh 7.4 V lithium battery can send distress messages to
COSPAS Rescue Centre and Beidou Rescue Centre 200 times each, and the
distress message contains the vital signs of people in distress. The
vital sign is the temperature information. Ideally, the 7000mAh 7.4V
lithium battery can support the continuous working time of the market
for 48 hours.