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Design of On-Board Weighing Monitoring System Based on CDMA Transmission
Author: LuoZuo
Tutor: YangHui
School: East China Jiaotong University
Course: Proceedings of the
Keywords: Board Scales DM642 Video Image Processing CIF format conversion Real-time improvements Two-way bandwidth multiplexing Remote monitoring
CLC: TN929.533
Type: Master's thesis
Year: 2009
Downloads: 54
Quote: 0
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Abstract
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In recent years , mobile communications technology continues to mature , are to the 3G network transition to the characteristics of high data transmission rate , China Unicom in 2003 launched the CDMA2000 1x data services . Provides an effective and reliable way to set up a wireless communication network to the CDMA technology , for the wireless transmission of the large amount of data such as video . At the same time , digital signal processing in multimedia applications continue to strengthen , the major DSP manufacturers continue to introduce new DSP processors pieces . TI's recently introduced high-performance TMS320DM642 digital media processor , clocked at up to 600MHz, the computing power of up to 4800MIPS , can perform complex calculations to achieve efficient compression of video images , ideal for multimedia applications . In this paper, the highway -vehicle dynamic weighing system [ 2 ] , weighing locations randomly , remote command center on -site weighing the vehicle can not be the problem of real-time monitoring , use the car to take pictures of the scene vehicle video image compression processing by the DSP Thereafter, the CDMA wireless network, to allow a remote monitoring center can be observed in real time by the received video images and data field situation . The design of the study car weighing wireless monitoring system is the weighing location is not fixed , the best choice for remote real-time monitoring . The package has the advantage of lower cost, and do not need to spend a lot of money used in the laying and maintenance of equipment of the communication cable . Second is the high flexibility, as long as a signal , independent of location restrictions . Papers on the basis of the analysis of CDMA transmission in low- bandwidth , real-time performance and reliability is poor , raised two CDMA bandwidth multiplexing scheme , to improve the video transmission rate ; optimized transport protocol , to improve the real-time nature of the system , reducing wireless transmission of packet loss rate . Primarily designed to complete a car weighing the hardware design of the monitoring system , as well as the sending end video capture and network transmission , the the remote receiving end monitoring software design .
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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Mobile Communications > Cellular mobile communications systems (mobile phones, mobile phone handsets ) > Code Division Multiple Access (CDMA) mobile communication
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