Based Cpld + Nrf24e1 To In Wireless Sensor Detection System

A new Wireless Sensor Detecting System is introduced in this article.The systemcould detect seismic signal of person and vehicle,and transmit it by radio.System iscomposed of Seismic Signal Detecting System and Wireless Communication System.Seismic Signal Detecting System is based on CPLD,up-to-4-channel signal can besampled simultaneously.In system,seismic signal can be magnified, fiter, and then sampled.CPLD implement control function,and communicate with Wireless CommunicationSystem by UART.nRF24E1 radio chip of Nordic VLSI corporation is selected as the core apparatus inWireless Communication System. nRF24E1 is based on radio technology, work onISM(Industrial Scientific Medical) frequency,2.4GHz.nRF24E1 is a System onChip,embedded 8051 MCU and nRF2401 radio communication chip.This paper introducesoftware and hardware design of Wireless Communication System.It consist of electricconversion circuit design,periphery memory circuit design,interface with Signal DetectingSystem circuit design,antenna design and PCB design.This paper also explain workingmode of nRF24E1 in detail,and then write out program compile when nRF24E1 work ascommunication mode.The whole design is based on the Unattended Ground Sensor (UGS) system.