CN207560000U - The controller LAN optic fiber converter of baud rate self-adapting - Google Patents
The controller LAN optic fiber converter of baud rate self-adapting Download PDFInfo
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- CN207560000U CN207560000U CN201721417463.3U CN201721417463U CN207560000U CN 207560000 U CN207560000 U CN 207560000U CN 201721417463 U CN201721417463 U CN 201721417463U CN 207560000 U CN207560000 U CN 207560000U
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Abstract
The utility model belongs to lan device technical field, discloses the controller LAN optic fiber converter of baud rate self-adapting, including：CAN transceiver, CAN controller, data conversion module and TTL optic fiber converters, CAN transceiver one end connects CAN bus, the other end connects CAN controller, and CAN controller is connect by data conversion module with TTL optic fiber converters, and TTL optic fiber converters are connect with optical fiber.The utility model being capable of automatic identification CAN baud rates.
Description
Technical field
The utility model belongs to the controller LAN light of lan device technical field more particularly to baud rate self-adapting
Fine converter.
Background technology
At present, CAN (controller LAN) bus distributed system of twisted-pair feeder has been widely applied, as automobile,
Elevator controlling, electric power system control etc., every technology are ripe.Compared with twisted-pair feeder and coaxial cable, the low transmission of optical fiber
Loss greatly increases transmission range.In addition to this, optical cable also have non-radiating energy, it is non-conductive, without characteristics such as inductance, and
There is no the influences that crosstalk and optical signal interfere with each other in optical cable, have excellent anti-EMI filter and EMC characteristics, there will not be
The safety problem caused by line influence coupling.
CAN bus is one of most widely used fieldbus in the world, because of its high reliability and good error detection
Ability is taken seriously, and is widely used in the various fields such as industrial automation, monitoring system, medical system.But CAN bus is most
Big transmission range is no more than 2 kms, and farther transmission range needs to be extended by relay or hub etc., uses optical fiber
Extension is a kind of common method.
CAN bus can use different baud rates, common baud in different application environments (mainly communication distance)
Rate has 5Kbps, 10Kbps, 20Kbps, 50Kbps, 100Kbps, 125Kbps, 250Kbps, 500Kbps, 1000Kbps etc., makes
The equipment to be communicated with same CAN bus, the CAN baud rates of all equipment must be consistent, and otherwise equipment will be unable to correctly connect
Receive and send CAN data.
At present there are mainly two types of CAN baud rate self-adaptings technologies：It passively listens and active probe.
Passive monitoring mode：Place a device in listening mode, monitor data in bus, by interrupt type (receive interrupt,
Fault interrupt) differentiate whether baud rate matches.CAN bus is needed ceaselessly to send out data to equipment there are one node, if do not had
Equipment actively sends out data, this mode can not use.
Active probe mode：Active sending mode is placed a device in, specific data packet is sent toward the node in bus, if
Node in bus is consistent with the baud rate of equipment, then the data packet that can be received, and then node is fed back to equipment, and equipment receives
To feedback data packet, then it is assumed that connection setup, baud rate is consistent, otherwise changes equipment baud rate, continues to send, until communication is built
It is vertical.This scheme needs to carry out data interaction with the node in bus, if without the node that can be interacted, this mode can not also make
With.
Utility model content
A kind of controller LAN optical fiber for the being designed to provide baud rate self-adapting conversion of the utility model embodiment
Device, being capable of automatic identification CAN baud rates.
What the utility model embodiment was realized in：
The controller LAN optic fiber converter of baud rate self-adapting, including：CAN transceiver, CAN controller, data turn
Change the mold block and TTL optic fiber converters, CAN transceiver one end connection CAN bus, other end connection CAN controller, CAN controller
It is connect by data conversion module with TTL optic fiber converters, TTL optic fiber converters are connect with optical fiber；The CAN controller includes
Baud rate index handover module, CAN frames detection module and response sending module, baud rate index handover module are detected with CAN frames
Module connects, and CAN frames detection module is connected with response sending module, and baud rate indexes handover module, CAN frames detection module and answers
It answers sending module all to connect with CAN transceiver respectively, baud rate index handover module switches different baud rates and receives and dispatches by CAN
Device sends detection data to CAN bus, and CAN frames detection module detects the CAN frames of CAN transceiver, and response sending module is detecting
Response pass signal is sent by CAN transceiver CAN bus after to CAN frames.
The utility model embodiment actively sends the success or not of detection data by CAN controller
No matching, and constantly regulate, solving passive monitoring mode and needing equipment active transmission data and active probe mode needs
The problem of carrying out data interaction with the node in bus is at will sent out a probe data packet, due to the characteristic of CAN, can only be sent
Success means that baud rate is matched (as long as not needing to other side in bus and returning data there are one normal node；It is main
Dynamic detection mode is to send specific data packet toward the node in bus, if the node in bus is consistent with the baud rate of equipment,
The data packet that can then receive, then node fed back to equipment, equipment receives feedback data packet, then it is assumed that connection setup, wave
Special rate is consistent, and the difference with pervious active probe mode maximum as long as the utility model can be sent out, does not need to other side
Confirmed by way of returning data, realize directly by whether send successfully judge baud rate whether successful match
CAN optic fiber converters realize the CAN optic fiber converters with simply and easily baud rate self-adapting.
Description of the drawings
Fig. 1 is the schematic diagram of the utility model CAN optic fiber converters；
Fig. 2 is the schematic diagram using the utility model CAN optic fiber converters of microcontroller；
Fig. 3 is the work flow diagram of the utility model CAN optic fiber converters；
Fig. 4 is the schematic diagram of the utility model CAN controller.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention is further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
The specific implementation of the utility model is described in detail below in conjunction with specific embodiment：
As shown in Figure 1, Figure 2 and Figure 3, the controller LAN optic fiber converter of baud rate self-adapting, which is characterized in that packet
It includes：CAN transceiver, CAN controller, data conversion module and TTL optic fiber converters, CAN transceiver one end connection CAN bus,
The other end connects CAN controller, and CAN controller is connect by data conversion module with TTL optic fiber converters, the conversion of TTL optical fiber
Device is connect with optical fiber；In Fig. 4, the CAN controller includes baud rate index handover module, CAN frames detection module and response hair
Module is sent, baud rate index handover module is connect with CAN frame detection modules, and CAN frames detection module is connected with response sending module,
Baud rate index handover module, CAN frames detection module and response sending module are all connect with CAN transceiver respectively, baud rate rope
Draw handover module and switch different baud rates by CAN transceiver to CAN bus transmission detection data, CAN frames detection module is examined
Survey CAN transceiver CAN frames, response sending module after CAN frames are detected by CAN transceiver CAN bus send response into
Function signal.
CAN transceiver：Complete the mutual conversion of CAN differential signals and TTL signal；CAN controller：CAN frames are detected, concurrently
Send answer signal；Data conversion module：Complete the mutual conversion of CAN data and serial data；TTL fiber optical transceivers：Complete light
The mutual conversion of optical fiber signaling and TTL signal.
CAN transceiver, CAN controller, data conversion module and TTL optic fiber converters may be used microcontroller (MCU),
Application-specific integrated circuit (ASIC), Complex Programmable Logic Devices (CPLD), field programmable gate array (FPGA), hardware circuit etc.
Any one or more of device can be realized.
In Fig. 2, CAN transceiver：Complete the mutual conversion of CAN differential signals and TTL signal；Microcontroller：Realize CAN numbers
It is sended and received according to frame, realizes that serial data frame sends and receivees；TTL fiber optical transceivers：Complete fiber-optic signal and TTL signal
Mutually conversion.
In Fig. 3, CAN baud rate detection modes：Actively send CAN data frames, send successfully then think baud rate matching into
Work(；Failure is sent, then is retransmitted using next baud rate；It repeats the above process, until direct detection success.CAN data
Translative mode：CAN data are received, TTL signal is converted to light by reconvert into serial data finally by TTL fiber optical transceivers
Signal；The optical signal received is converted to by TTL signal by TTL fiber optical transceivers, reconvert finally passes through again into CAN data
CAN data are sent.
Baud rate index handover module is provided in the embodiment of the utility model, in CAN controller, allowing in this way can
It realizes that baud rate matches constantly to send detection data by different baud rates, so as to achieve the purpose that data interaction, builds
Vertical data connection channel, convenience and high-efficiency are properly received and send CAN data.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (1)
1. the controller LAN optic fiber converter of baud rate self-adapting, which is characterized in that including：CAN transceiver, CAN controls
Device, data conversion module and TTL optic fiber converters, CAN transceiver one end connection CAN bus, other end connection CAN controller,
CAN controller is connect by data conversion module with TTL optic fiber converters, and TTL optic fiber converters are connect with optical fiber；The CAN
Controller includes baud rate index handover module, CAN frames detection module and response sending module, baud rate index handover module with
CAN frames detection module connects, and CAN frames detection module is connected with response sending module, baud rate index handover module, the inspection of CAN frames
It surveys module and response sending module is all connect with CAN transceiver respectively, baud rate index handover module switches different baud rates
Detection data is sent to CAN bus by CAN transceiver, CAN frames detection module detects the CAN frames of CAN transceiver, and response is sent
Module sends response pass signal after CAN frames are detected by CAN transceiver CAN bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721417463.3U CN207560000U (en) | 2017-10-30 | 2017-10-30 | The controller LAN optic fiber converter of baud rate self-adapting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721417463.3U CN207560000U (en) | 2017-10-30 | 2017-10-30 | The controller LAN optic fiber converter of baud rate self-adapting |
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| Publication Number | Publication Date |
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| CN207560000U true CN207560000U (en) | 2018-06-29 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109656172A (en) * | 2018-12-24 | 2019-04-19 | 深圳市道通科技股份有限公司 | A kind of method, apparatus obtaining baud rate |
| CN109768907A (en) * | 2019-01-09 | 2019-05-17 | 北京安控科技股份有限公司 | A kind of CAN bus baud rate self-adapting setting method |
| CN112422233A (en) * | 2020-10-27 | 2021-02-26 | 深圳Tcl新技术有限公司 | Device communication method, communication device, and computer-readable storage medium |
| CN114866367A (en) * | 2022-04-13 | 2022-08-05 | 深圳市三旺通信股份有限公司 | CAN equipment communication method and device, CAN optical modem equipment and medium |
| CN116155645A (en) * | 2023-02-27 | 2023-05-23 | 上海中韩杜科泵业制造有限公司 | CAN bus-based equipment network access method, device, equipment and medium |
| CN117376058A (en) * | 2023-12-07 | 2024-01-09 | 武汉神动汽车电子电器股份有限公司 | CAN bus baud rate self-adaption method |
-
2017
- 2017-10-30 CN CN201721417463.3U patent/CN207560000U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109656172A (en) * | 2018-12-24 | 2019-04-19 | 深圳市道通科技股份有限公司 | A kind of method, apparatus obtaining baud rate |
| CN109768907A (en) * | 2019-01-09 | 2019-05-17 | 北京安控科技股份有限公司 | A kind of CAN bus baud rate self-adapting setting method |
| CN112422233A (en) * | 2020-10-27 | 2021-02-26 | 深圳Tcl新技术有限公司 | Device communication method, communication device, and computer-readable storage medium |
| CN114866367A (en) * | 2022-04-13 | 2022-08-05 | 深圳市三旺通信股份有限公司 | CAN equipment communication method and device, CAN optical modem equipment and medium |
| CN114866367B (en) * | 2022-04-13 | 2023-12-05 | 深圳市三旺通信股份有限公司 | CAN equipment communication method and device, CAN optical cat equipment and medium |
| CN116155645A (en) * | 2023-02-27 | 2023-05-23 | 上海中韩杜科泵业制造有限公司 | CAN bus-based equipment network access method, device, equipment and medium |
| CN116155645B (en) * | 2023-02-27 | 2023-09-22 | 上海中韩杜科泵业制造有限公司 | CAN bus-based equipment network access method, device, equipment and medium |
| CN117376058A (en) * | 2023-12-07 | 2024-01-09 | 武汉神动汽车电子电器股份有限公司 | CAN bus baud rate self-adaption method |
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Address after: The 1 District of Nanshan District high tech Industrial Park, Xili Street Baiwang letter 518000 Shenzhen city in Guangdong province 3 Patentee after: 3ONEDATA Co.,Ltd. Address before: The 1 District of Nanshan District high tech Industrial Park, Xili Street Baiwang letter 518000 Shenzhen city in Guangdong province 3 Patentee before: SHENZHEN 3ONEDATA TECHNOLOGY Co.,Ltd. |
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