為了解決機(jī)房監(jiān)控中數(shù)據(jù)傳輸實(shí)時(shí)性差、成本高以及人工巡邏效率低的問題，討論了ARM7的數(shù)據(jù)采集和串口通信原理，針對(duì)惡劣條件下數(shù)據(jù)傳輸誤差大的特點(diǎn)，提出將GPRS無線通信和高效節(jié)能芯片LPC2114相結(jié)合的設(shè)計(jì)方案。既實(shí)時(shí)、有效地將機(jī)房信息傳送到監(jiān)控中心，又實(shí)現(xiàn)了機(jī)房的無人值守。在系統(tǒng)組成上提出模塊化設(shè)計(jì)，模塊之間通信采用RS485通信方式，最大實(shí)際傳輸距離可達(dá)800 m，該設(shè)計(jì)既保證了數(shù)據(jù)的可靠傳輸，又使系統(tǒng)結(jié)構(gòu)更加簡(jiǎn)單、性能更加穩(wěn)定，為以后系統(tǒng)升級(jí)提供了條件。在實(shí)際應(yīng)用中，無線數(shù)據(jù)終端傳輸速率可達(dá)40 kbps，完全能夠滿足將各項(xiàng)數(shù)據(jù)實(shí)時(shí)地傳輸?shù)奖O(jiān)控中心。

Abstract:

?In order to solve the problem of computer monitoring data transmission in real-time，high cost and low artificial patrol efficiency，this paper discussed the data acquisition of ARM7 and principle of serial communication. And the design scheme combined GPRS wireless communication and the highly effective energy conservation chip LPC2114 was presented because of data transmission error in bad environment，the system not only made the computer information transmit to the monitoring center real-time and effectively，but also realized unmanned watching.In the system composition，this paper proposed modular design，which adopted RS485 communication between communication module whose practical transmission distance can reach the maximum of 800 meters.The design makes the data reliable transmission，the system structure is simple，and the performance is stable，which also provides conditions for the system upgrading in the future.In practical applications，the transmission rate of the wireless data terminal can up to 40kbps，which completely meets the real-time data transmission to the monitoring center.

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