Design And Implementation Of Broadband Low Power Underwater Acoustic Transponder

Underwater acoustic positioning technology is developing in high speed.The underwater acoustic transponder,as a necessary equipment for underwater acoustic positioning system,more powerful function,smaller volume,lower power consumption will be its future development direction.Transponder takes use of lithium battery as power supply equipment,thus power consumption has become the key factor which restrict the development of the transponder.Low power design is of great significance for transponder.This paper designed a model of response,release and synchronization trigger underwater acoustic transponder with low consumption.In this paper,in order to reduce the power consumption of the transponder as the goal,according to the features of low power consumption,the transponder in the design process of hardware circuit components selection,software design,power system dynamic management is optimized,so as to effectively reduce the power consumption of the transponder.In the design of hardware circuit,we use the low-power hardware to design the transponder system,comprehensively consider the power consumption of digital processing chip and performance,selecting the digital processing chip low-power processor MSP432,LT8610 AB for power conversion chip,with a core of AD8542 and SSM2212 receiving circuit simulation.This paper expounds the MSP432 minimum system,LT8610 AB power conversion circuit,MAX823 S hardware reset circuit,serial communication circuit,the release of the circuit and receiving circuit simulation.In the software part of the transponder,this paper completed the ask signal analysis of the correlation detection algorithm and 2 FSK release instruction code detection algorithm analysis.Also we make relevant test to the implementation of inquiry signal detection on MSP432 platform,the release instruction detection and the synchronous trigger detection procedures,using the processing chip for motor control to achieve the release of the transponder.According to working characteristics of the low power consumption,transponder system with comparator complete MSP432 ADC14 module for CPU and hibernation.Finally,the transponder system is tested integrally,the analog circuit power consumption,noise,bandwidth of transponder system,and the conversion efficiency of a power supply chip modules are all analyzed.The ask signal detection procedures,release order program,external synchronous trigger are all included in the test.The transponder in this paper realized the function of response,release,synchronous trigger.