| The supervision and control system for mobile communication power supply and room environment will test,communicate with,control and adjust a amount of mobile service centers and mobile base station,monitor the operation status of the system and devices real time,record and deal with responsive data,seek for fault and note people to solve in time,so as to implement few one even nobody on duty in the mobile service center or supervision,control and maintenance in mobile base station. This system has been an indispensable component of the whole mobile communication by its important action of ensuring communication,making devices better operation and depletion of numbers and plus benefit.The article analyzes the requirement of the system in design from hardware requirement and software requirement. To intelligence device that has communication interface and protocol, it is to be convert protocol and provide interface. But others need to be convert to voltage by sensor for collecting data. So the data collecting system plays a very important role as a necessary bridge of communicating analog area and digit area. This article is mainly talk about the data collecting system. Usually a multi-input system is analog input and digit input responsively. for all kind of object, the I/O interface is to hope a integral interface and transform current to voltage,so it is. By compared and demonstrated, th method of multi-channel ADC replacing channel switches and common ADC is used, whose conversion vector of 12 bit and serial output ensures the precious data collect, simply the interface with microprocedure. The hardware is microcontroller as its key point and it also includes the data collect module, communication module, man-machine interface, control output module and failure supervision. According with the need of high accuracy and high reliability in appliance, the article compares and chooses ADCs, communication interfaces and so on which suit for the designed system. Meanwhile the program of those parts is edited. For increasing reliability and simplying hardware, the programmable chips are used. CPLD chip is used as the man-machine interface and I/O expandling to carry out the functions accomplished by several chips, which reduces the cost and volume efficiently and improve the performance. PSD813F chip as peripheral device is applied and replaced the chips of chip selection, address latch, memory etc.. The function of IAP updates the system expediently. RS-485 chip is applied to communicate with PC. The isolation chip in hardware and the check code in software both ensure transmission accurately and reliably. For the rich PCM resource of mobile communication, the PCM system is applied in the transmission. The design of software is mainly written by assemble language and VC. The principle is implementing the functions by short sentences as possible. It includes MCU program, data collect program, communication program and peripheral device configure and CPLD design. It also finishes multiply process communication, defines the communication protocol frame.As the software is the key part in fulfill the function of hardware, the article designs carefully and issures as functional module. The whole article is built with theory of modulazition. It is the premise for Designning a system to recognize the object and request, it is the content of introduction. The second port analyses the system and arguer the projects put forward. The next part is the annalyse of the key technolige of hareware.The next part designs the software.The result of experiment is verified in the last part. |
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