Embedded general communication board based on signal ML language
An embedded and communication board technology, which is applied in the traffic control system of road vehicles, traffic control systems, instruments, etc., can solve the problems of high cost, poor reliability, and difficult integration, etc., to achieve maximum benefits and improve the effect of integration
Inactive Publication Date: 2009-07-08
BEIJING UNIV OF TECH
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[0007] Through comprehensive analysis, we can see that the above traffic control systems, centers and signal machines all transmit data according to their own special protocols, and there is no compatibility with domestic signal machines, and the integration is not easy. Although the ACTRA system uses the open NTCIP protocol, but This protocol is closely related to the control function and algorithm of the system, and the development of domestic signal machines following it has great limitations and high costs
In addition, although there are many domestic signal machine manufacturers, the signal machines produced have few functions and poor reliability.
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[0034] Technical scheme of the present invention: this embedded universal communication board based on SignalML language comprises two boards of core board and target board, and what wherein core board adopted is ColdFire microprocessor 5272, and it has variable-length RISC (reduced instruction set) structure , and integrates a high-performance core with a high code density and a large number of peripheral interfaces, using μCLinux embedded operating system. μCLinux is developed based on the Linux kernel. It is an embedded operating system specially built for microprocessors without memory management units, and it is also free software released under the free software GNU Public License (GPL). The core board includes a memory expansion part (including two parts of Flash and SDRAM memory expansion), a reset and clock circuit setting part, and a starting circuit configuration part. The target board mainly includes embedded TESTMODULE components, power supply circuit part, CPLD p...
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The invention belongs to the field of urban traffic signal control, and is characterized in that: the communication board is a markup language specification based on extensible markup language to describe the control information of signal light control intersections, which can make different manufacturers and different types of traffic control signal machines and The communication board for communication between the upper computer, which integrates the target board with the core board, realizes the communication between the upper computer and the core board through the target board, and configures a CPLD device on the target board so that the core board can pass through the target board. The CPLD on the board is used to control and configure the bus as required, so as to realize the communication with the signal machine and other bus devices. The invention has the advantages of strong common use, high integration, and can fully exert the maximum benefit of the urban traffic signal control system.
Description
technical field [0001] The embedded universal communication board based on the SignalML language can realize the communication between different manufacturers and different types of traffic control signal machines and the host computer, and follow the proposed new data exchange standard for urban traffic signal control systems—SignalML (traffic Signal Markup Language), which can be widely used in the field of urban traffic signal control. Background technique [0002] Urban traffic signal control system, as an important part of intelligent transportation system, plays a pivotal role in alleviating urban traffic congestion, ensuring smooth traffic and maintaining good traffic order. [0003] However, the communication protocols used in the relatively mature urban traffic signal control systems imported from abroad are all special protocols, which are not open to the outside world. As a result, when the system is expanded and newly built, the special signal machine of the orig...
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IPC IPC(8): H04L29/00G08G1/00
Inventor 石建军于泉顾九春
Owner BEIJING UNIV OF TECH