CN201489361U

CN201489361U - Extensible zone controller based on CAN bus

Info

Publication number: CN201489361U
Application number: CN200920217276XU
Authority: CN
Inventors: 贾恒石
Original assignee: Individual
Current assignee: Beijing Trade Control Technology Co Ltd
Priority date: 2009-09-27
Filing date: 2009-09-27
Publication date: 2010-05-26
Anticipated expiration: 2019-09-27

Abstract

An extensible zone controller based on a CAN bus solves the technical problems of convenient maintenance of the zone controller and the convenient extension and updating of a system. The utility model adopts the technical scheme that the system structure of the zone controller comprises a control module with a processor, wherein the control module consists of a master control module and a sub-control module, the master control module is connected with a transmitter and a receiver in the sub-control module depending on a main-board which is provided with a CAN bus and an RS485 bus. The zone controller effectively improves the real-time and reliability of the system, has modularization design, strengthens the expansion and maintenance of the system, simultaneously realizes the information sharing, and is easy to the update system.

Description

A kind of based on the extendible zone controller of CAN bus

Technical field

The utility model relates to a kind of data acquistion and control system, specifically is the zone controller that a kind of modular design based on the CAN bus has extensibility.

Background technology

Along with science and technology development, supervisory system is also more and more used by people.There is higher traffic hazard danger in vcehicular tunnel as the special road section on the highway.When emergency such as traffic hazard particularly takes place, make a world of difference in traffic transporting and rescue work and common highway section, and the consequence that second accident produces is much serious more than the primary accident.In order to make tunnel energy safety, environmental protection, efficient, economical operation, tunnel monitoring system is that the safety guarantee in tunnel is requisite, also is to guarantee the unimpeded and necessary job facilities of environmental protection of tunnel traffic.Tunnel monitoring system is generally by Surveillance center, and zone controller and field apparatus constitute.And tunnel monitoring system generally is made of subsystems such as illuminator, ventilating system, systems for traffic guiding, and each system is made up of numerous field apparatuss, and this just needs zone controller will think that on-the-spot various device organically couples together to constitute complete, controlled integral body.At present, adopt industry control information acquisition plate or external PLC controller more, the various input input equipments at scene and the computing machine of Surveillance center are connected.And industry control information acquisition plate is pointed, is difficult for system upgrade, and after breaking down, it is very inconvenient to change; Adopt external PLC, increased engineering cost greatly, and exploitation and maintenance need the professional.

Summary of the invention

The technical matters of being convenient to the maintenance of zone controller and being convenient to the expansion and upgrading of system for solution, the utility model has designed a kind of based on the extendible zone controller of CAN bus, utilizes CAN bus and RS-485 bus to realize the control function of arm processor jointly.

The utility model realizes that the technical scheme that goal of the invention adopts is, a kind of based on the extendible zone controller of CAN bus, comprise the control module that has processor in the system architecture of above controller, above-mentioned control module comprises main control module and sub-control module, and the sending and receiving device in main control module and the sub-control module is by supporting corresponding connection of the distribution CAN bus and the motherboard of RS485 bus.

The beneficial effects of the utility model are to connect on-the-spot various interface equipment by various modules, the duty of institute's connection device is sent to the main control module by the CAN bus, the main control module is according to the logic control information that is stored in the chip, the information that will control sends to corresponding sub-control module by the CAN bus again, sub-control module is received the duty of following again after the data according to the programmed control connected equipment of self, effectively raises the real-time and the reliability of system; Modular design has strengthened the extendability and the maintainability of system, has realized information sharing simultaneously, is easy to system upgrade.

Below in conjunction with accompanying drawing the utility model is elaborated.

Description of drawings

Fig. 1 is a system block diagram of the present utility model.

Fig. 2 is a CAN transceiver control circuit schematic diagram of the present utility model.

In the accompanying drawing, the 1st, main control module, the 2nd, sub-control module, the 3rd, motherboard, the 4th, primary processor, 4-1,4-2 ... 4-5 is a sub-processor, the 5th, and the FLASH storer, the 6th, CAN transceiver control circuit, 7,7-1,7-2 ... 7-5 is the CAN bus transceiver, 8,8-1,8-2 ... 8-5 is the RS-485 bus transceiver, the 9th, and digital quantity input module, the 10th, the digital quantity output module, the 11st, analog quantity load module, the 12nd, analog output module, the 13rd, communication module, the 14th, host computer, the 15th, communication interface, the 16th, display circuit, FDS6679 are chips, R1 is a resistance, and LED is a pilot lamp.

Embodiment

Referring to Fig. 1, a kind of based on the extendible zone controller of CAN bus, comprise the control module that has processor in the system architecture of above controller, above-mentioned control module comprises main control module 1 and sub-control module 2, and the sending and receiving device in main control module 1 and the sub-control module 2 is by motherboard 3 supporting corresponding are connected of distribution CAN bus with the RS485 bus.

Above-mentioned main control module 1 comprises primary processor 4, CAN transceiver control circuit 6, CAN bus transceiver 7, RS-485 bus transceiver 8 and be connected FLASH storer 5 and the communication interface 15 that is connected host computer 14 usefulness on the primary processor 4, wherein primary processor 4 is by the CAN interface, control interface and serial line interface respectively with CAN bus transceiver 7, CAN transceiver control circuit 6 is connected with RS-485 bus transceiver 8, CAN transceiver control circuit 6 and 7 supporting connections of CAN bus transceiver, CAN bus transceiver 7 and RS-485 bus transceiver 8 respectively with sub-control module 2 in each CAN bus transceiver 7-1,7-2 ... 7-5 and RS-485 bus transceiver 8-1,8-2 ... 8-5 connects.

Above-mentioned sub-control module 2 comprises digital quantity input module 9, digital quantity output module 10, analog quantity load module 11, analog output module 12 and the communication module 13 with same structure, wherein comprises sub-processor 4-1,4-2 in each module ... 4-5, CAN transceiver control circuit 6, CAN bus transceiver 7-1,7-2 ... 7-5, RS-485 bus transceiver 8-1,8-2 ... 8-5.

At each sub-control module 2-1,2-2 ... all be provided with display circuit 16 among the 2-n.

Above-mentioned motherboard 3 is provided with motherboard cascade expansion connector.

Above-mentioned primary processor 4 is arm processors.

Above-mentioned sub-processor 4-1,4-2 ... 4-n is an arm processor.

Digital quantity input module 9 is used for connecting that output signal is the equipment of switching value in the tunnel, as the fire alarm manual alarm.Digital quantity output module 10 is used for controlling the traffic lights in the system for traffic guiding, the lighting lamp controller in the illuminator.Analog quantity load module 11 is used for the equipment of analog quantitys such as connection detector, wind direction and wind velocity detector output; Communication module 13 is used for connecting on-the-spot wagon detector, weather detector, variable information board, variable speed-limit sign equipment.

During system works, the duty of main control module 1 each module of cyclic query, each module is subjected to behind the querying command duty separately being reported main control module 1 by the CAN bus, main control module 1 is received after the new status information of module again according to the system control scheme that is stored in 5 storages of FLASH storer, issue new control information to corresponding sub-control module 2, sub-control module 2 according to self control program again connected equipment be set to new duty.When monitoring equipment was inquired about, main control module 1 was the RS-232 communication interface with the duty of system by the networking network, and RS-485 interface and network interface report host computer 14.When module of main control module 1 cyclic query, repeatedly overtime this module of not receiving is responded, think that then this module CAN communication breaks down, and then inquire about this module by 485 buses on the motherboard 3, if this module is responded then is sent control information by 485 buses, allow the ARM sub-processor of this module control the power supply that CAN transceiver control circuit 6 cuts off the CAN bus transceivers, by force this module is extractd from the CAN bus, initiatively report host computer 14 simultaneously; Do not respond as this module, think that then this module damages, then fault is initiatively reported host computer 14.Display circuit 16 in the module is used for the duty of display module connected equipment.

See Fig. 2, be the control circuit figure of CAN transceiver.The 1st, 2 and 3 pins of chip FDS6679 are connected to the working power VCC of system, the 4th pin is connected to an I/O pin of arm processor, 5th, 6,7 and 8 pins couple together, and link the power pins of CAN transceiver, and pilot lamp LED and resistance R 1 constitute the display circuit 16 of CAN transceiver.When the I/O of arm processor pin is changed to low level, the 5th pin output high level, pilot lamp LED is bright; When the I/O of arm processor pin was changed to high level, the 5th pin output low level disconnected CAN bus transceiver power supply, and pilot lamp LED goes out.

Claims

1. one kind based on the extendible zone controller of CAN bus, comprise the control module that has processor in the system architecture of above controller, it is characterized in that: described control module comprises main control module (1) and sub-control module (2), and the sending and receiving device in main control module (1) and the sub-control module (2) is by motherboard (3) supporting corresponding be connected of distribution CAN bus with the RS485 bus.

2. according to claim 1 a kind of based on the extendible zone controller of CAN bus, it is characterized in that: described main control module (1) comprises primary processor (4), CAN transceiver control circuit (6), CAN bus transceiver (7), RS-485 bus transceiver (8) and be connected FLASH storer (5) and the communication interface (15) that is connected host computer (14) usefulness on the primary processor (4), wherein primary processor (4) is by the CAN interface, control interface and serial line interface respectively with CAN bus transceiver (7), CAN transceiver control circuit (6) is connected with RS-485 bus transceiver (8), CAN transceiver control circuit (6) and supporting connection of CAN bus transceiver (7), CAN bus transceiver (7) and RS-485 bus transceiver (8) respectively with sub-control module (2) in each CAN bus transceiver (7-1,7-2 ... 7-5) with RS-485 bus transceiver (8-1,8-2 ... 8-5) connect.

3. according to claim 1 a kind of based on the extendible zone controller of CAN bus, it is characterized in that: described sub-control module (2) comprises digital quantity input module (9), digital quantity output module (10), analog quantity load module (11), analog output module (12) and the communication module (13) with same structure, wherein comprises sub-processor (4-1,4-2 in each module ... 4-5), CAN transceiver control circuit (6), CAN bus transceiver (7-1,7-2 ... 7-5), RS-485 bus transceiver (8-1,8-2 ... 8-5).

4. according to claim 3 a kind of based on the extendible zone controller of CAN bus, it is characterized in that: at each sub-control module (2-1,2-2 ... all be provided with display circuit (16) 2-n).

5. according to claim 1 a kind of based on the extendible zone controller of CAN bus, it is characterized in that: described motherboard (3) is provided with motherboard cascade expansion connector.

6. according to claim 2 a kind of based on the extendible zone controller of CAN bus, it is characterized in that: described primary processor (4) is an arm processor.

7. according to claim 3 a kind of based on the extendible zone controller of CAN bus, it is characterized in that: described sub-processor (4-1,4-2 ... 4-n) be arm processor.