| An intelligent system applied to line-patrolling and line-checking has been described there. By using the serial interface of RS-232 to transfer, the data collected in the process of line patrolling and checking can be put into a database which has been built in the local computer. A new technology of accessing database, ADO.NET, has been used to put the data collected into the enterprise SQL Server database. When the data has been handled, a result analyzed to attain the enterprise management object can be gotten by a rule which has been built earlier. When it has been transferred into the database, an action of inquiry or making report forms can be made. And the printed function also can be achieved.The description of constructing the rules of making schedule is put on the first place. Through a deeply analyzing about the relationship between the rules and the data, an appropriate result can be attained by using the rules existed. And a model of network communication has been given there, as well as its mechanism of implement. A protocol which the both sides of sender and receiver must be lay on is presented, and the dependability of data transfer also has been described. A method of remote communication based on modem has been made a further introducing there. Connected with the enterprise database, ADO.NET's mechanism of accessing database also has been carried out. With it another model of network communication has been figured out. And a method of how the patrolling and checking data can be transferred between the two enterprise's databases distributing in different areas through WAN also has been given. At last, the key technologies associated with the intelligent patrolling and checking system are widely discussed there. A deeply analyzing of how to use AD0.NET to access the database and different database has been given. And the security of this system has been described; include the database security and the implement of system security protecting.
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