Research On Fabricationof Hollowrotor Inliquid-Suspendedgyroscope

Sensor technology, micro-electromechanical technology, the progress ofmodern Network and Wireless communication technology, promote the WirelessSensor Network (WSN, Wireless Sensor Network) of the emergence anddevelopment. The technology has already become one of the three high and newtechnology change the future world. The future, wireless sensor network (WSN) willsky, air, sea, land, underground integrated integrated sensor in the direction ofdevelopment. At present, the technology has been at the scene of the industrialmonitoring, environment monitoring, precision agriculture and other fields has beenwidely used. With the acceleration of railway informatization, the wireless sensornetwork technology has also become the important direction of railway automationand network.This topic according to the requirements of railway marshalling yard sitemonitoring information, design a kind of railway marshalling yard information monitoring system based on wireless sensor network (WSN), through the setting of wireless sensor network node along the railway track to realize themonitoring of information on the spot. According to the difference of locomotive and car wheel to information, set up the orbit of electromagnetic fieldmodel of the wheel, the wheels were analyzed sensor magnetic field changesat the top of the space, this paper proposes a new wheel detection methodbased on the principle of giant magnetoresistance. By establishing the mathematical model of the wheel sensor magnetic field strength, optimize the structure of the wheel sensor, after the test, sensor maximum detection range of about28mm. In order to achieve reliable wheel sensor signal acquisition andtransmission, choose CC2430rf SoC and MSP430processor, dual processorhas been designed the hardware platform of network nodes. CC2430of8051kernel is dedicated to run the ZigBee protocol stack, a protocol stack andMSP430to via a serial port control and the data were collected in the network, complex processing. Strengthening design of rf front-end circuit, improvesystem by radio frequency power amplifier and low noise amplifier transmitt ed power and receiver sensitivity.Based on wireless sensor network node test, the test results show that theclearing of two nodes in the open communication distance is3.2Km, can realize thescope of the wireless network coverage and reliable transmission. Set upinformation software simulation platform for railway marshalling yard, on themarshalling yard, simulation of train running state. The system at the scene of thefuture railway information monitoring field has a broad application prospect.