1 Introduction With the rapid development of the domestic aviation market, the airport and out of the increasing number of visitors, the airport information system on the computer automation and integration have become increasingly demanding, the transportation systems passenger baggage sorting system s processing capacity is also made more to higher demand, more and more Airport in the automatic baggage sorting system. Passenger baggage for automatic sorting system is a medium-sized airports, passenger baggage on centralized delivery, sorting and processing of an automation system, set the computer, industrial control network, PLC and electrical control technology, and a fast, efficient, high integration, etc, have broad application prospects. Advanced automatic sorting technique had previously been mastered by foreign countries, at present China s major airport baggage sorting system automatically sets most of the introduction of foreign systems, although the performance good, but expensive. In recent years, China has an active R & D units are put into force with independent intellectual property rights automated baggage sorting system solutions, this paper presents a development of the baggage from abroad automatic sorting system in an airport application.
Automatic baggage sorting system, description 2 2.1 Control System Architecture baggage sorting system (BHS) control the departure and arrival of two parts system equipment, using the information network, control network and remote I / O Link 3 control structure. Host Controller with two departures WINDOWS NT4.0 operating systems and INTOUCH 7.0 configuration software industry, mutual hot standby, dual-card, in addition to integration with the airport computer system (SI) and the departure control system computer (DCS) constitute Ethernet, but also to constitute a lower level host controller PLC Ethernet. AB PLC selected the company s two large processors PLC-5/80, mutual hot standby. PLC-5/80 not only rich in logic capacity, and has very powerful data processing capabilities. System architecture shown in Figure 1.
2.2 The principle of automatic baggage sorting automatic sorting system (BHS) and the airport to the Computer Integrated System (SI) and the departure control system computer (DCS) for real-time data exchange, and to obtain the data sent to the next bit PLC-5/80 for processing. Network topology shown in Figure 2.
PLC-5/80 must obtain the following three types of data:
A. Flight information. This information from the baggage sorting system host computer system from the airport, the flight computer integrated database to read and forward to the next bit PLC. Flight Information contained includes: flight number, destination code, check-in start time, end time of check-in, take-off time.
B. BSM message (Baggage Source Message). Passengers in baggage delivery, by the check-in computer-generated. Civil Aviation Administration of the host gathering this information packet sent to the departure airport computer systems, and then through the baggage sorting system to send messages to the baggage sorting machine interface, host controller, host controller to the internal LAN packet passes through PLC. Luggage packet includes flight number, destination code, serial number, the number of baggage items and other information..
C. Luggage bar code information. Serial number bar code contains the baggage baggage, passengers in the baggage delivery, by the check-in computer-generated, and was printed bar code label affixed to the passenger s luggage delivery. When the baggage through the scanning station, the bar code information is automatically scan reading, and passed to the PLC.
To achieve automatic sorting, PLC s data must be carried out twice more. First of all, PLC luggage bar code information and message information for each comparison, if the luggage bar code information and message information in the serial number has the same baggage, to determine the bar code and message are the same baggage of the information (bar code information contains water luggage number, the message contains information on baggage serial number and flight number); then packets of information and PLC in the flight schedule of the flights for each comparison, if the two corresponding section of the same information (flight number, destination code) will determine the bar code label affixed to the baggage belonging to the flight. Data flow shown in Figure 3.
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