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Fire alarm applicaton layer data transmission method based on CAN2.0B

A data transmission method and a technology of a transmission method, which are applied in the field of CAN2.0B-based fire alarm application layer data transmission, can solve problems such as inability to meet the needs of fire alarm systems

Active Publication Date: 2005-01-05
深圳市高新投三江电子股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the CAN2.0B standard alone cannot meet the needs of the current fire alarm system, which requires an application layer protocol to ensure the fast and reliable transmission of these data information

Method used

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  • Fire alarm applicaton layer data transmission method based on CAN2.0B
  • Fire alarm applicaton layer data transmission method based on CAN2.0B
  • Fire alarm applicaton layer data transmission method based on CAN2.0B

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] Hereinafter, the present invention will be further described in detail through specific embodiments in conjunction with the accompanying drawings.

[0025] 1. The construction of application layer protocol data packet format:

[0026] ID28

ID27

ID26

ID25

ID24

ID23

ID22

ID21

ID20

ID19

ID18

ID17

ID16

ID15

ID14

ID13

ID12

ID11

ID10

ID9

ID8

ID7

ID6

ID5

ID4

ID3

ID2

ID1

ID0

Basic ID identifier field

Extended ID identifier field

Packet type field (8 bits)

INFO_ID

Send source address field (8 bits)

SRC_ADDR

Receive destination address field (8

Bit)

DEST_ADDR

Packet data frame

Number field (5 digits)

INFO_ORDER

A

A

A

A

Note: A indicates that the field has been used at present, and different values can be filled according to the application.

[0027] Information packet type domain...

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PUM

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Abstract

The invention discloses a fire alarming application layer data transmitting method based on CAN2.0B, it constructs the information pack according to the length of the transmission information, at the same time, constructed data frame labels include information pack field, transmitting source field, receiving target address field, and information pack data frame number field, the priority of the transmitting information can be defines easily, overcomes the deficiencies that there has no transmitting source address and target address field in the CAN protocol, it can be applied to fire alarming control system; the replay mechanism of the receiving joint guarantees the reliability of the data transmission; it uses multi-frame transmission, or multi-pack, multi-frame transmission, accords the transmission of pack whose length more than single information layer, and of the file whose length more than the maximal permissible length of the single information layer pack; it uses time-out repeating mechanism, joint failure detecting mechanism, buffer area repeating mechanism in the data transmission process, thus it can guarantee the accuracy and effectiveness of data transmission.

Description

【Technical Field】: [0001] The invention relates to a data transmission method based on the CAN2.0B field bus application protocol, in particular to an application layer data transmission method applied in the field of fire alarm control. 【Background technique】: [0002] With the emergence of large-scale group buildings more and more, higher and higher requirements are put forward for automatic fire alarm systems in terms of geospatial fire detection and linkage control of fire-fighting equipment. Large-scale buildings make geographic description information larger, more fire detection points, and equipment linkage control more complicated. At the same time, as the communication distance is getting farther and farther, the delay of communication and the interference of the environment increase, which causes the real-time, accuracy and reliability of information transmission to decrease. All of these require the alarm host to drive and manage more drive circuit boards. The networki...

Claims

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Application Information

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IPC IPC(8): G08B25/00
Inventor 黄红军
Owner 深圳市高新投三江电子股份有限公司
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