CN101494571A - CAN bus self detection recovery device and method - Google Patents

CAN bus self detection recovery device and method Download PDF

Info

Publication number
CN101494571A
CN101494571A CNA2009100459308A CN200910045930A CN101494571A CN 101494571 A CN101494571 A CN 101494571A CN A2009100459308 A CNA2009100459308 A CN A2009100459308A CN 200910045930 A CN200910045930 A CN 200910045930A CN 101494571 A CN101494571 A CN 101494571A
Authority
CN
China
Prior art keywords
bus
node
answer signal
standby
recovery device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CNA2009100459308A
Other languages
Chinese (zh)
Other versions
CN101494571B (en
Inventor
周正仙
仝芳轩
刘亮
张大成
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Liaoning Electric Power Research Institute
Shanghai Boom Fiber Sensing Technology Co Ltd
Original Assignee
SHANGHAI HUAWEI AT CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SHANGHAI HUAWEI AT CO Ltd filed Critical SHANGHAI HUAWEI AT CO Ltd
Priority to CN2009100459308A priority Critical patent/CN101494571B/en
Publication of CN101494571A publication Critical patent/CN101494571A/en
Application granted granted Critical
Publication of CN101494571B publication Critical patent/CN101494571B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Abstract

The invention discloses a CAN bus self-detecting and restoring device which is used for a CAN bus with at least two CAN nodes and a terminal load, and comprises a CAN bus verification signal transmitter and a reply signal receiver which are connected on the CAN bus, a standby bus, and node restorers, wherein, each node restorer comprises: an additional load, and a controlled connector which can respectively connect the additional load with the CAN bus, the additional load with the standby bus, and the standby bus with the CAN bus; and each CAN node comprises a control unit used for controlling the start of the controlled connector. The invention also discloses a CAN bus self-restoring method which uses the standby bus to replace the CAN bus so as to restore breakpoints in the CAN bus. The beneficial effect of the invention lies in that: the invention can automatically detect and restore the breakpoints in the CAN bus, with lower cost.

Description

CAN bus self detection recovery device and method
Technical field
The present invention relates to a kind of CAN bus self detection recovery device and method, particularly a kind of self detection recovery device and method that makes the alternative CAN bus of standby bus by the node restorer.
Background technology
For solving control numerous in the Hyundai Motor and the exchanges data between the tester, normal at present employing controller area network network CAN (Controller Area Network) bus is transmitted data.CAN bus now adopts non-destructive bus arbitration technology, and communication distance can reach 10km (transfer rate is 5kb/s) farthest, and communication speed reaches as high as 1Mb/s (transmission range is 40m); The node number can reach 110, and its transmission medium that adopts is twisted-pair feeder or optical fiber, and message adopts short frame structure, have CRC check and other error detection measures, can realize full distributed multimachine system,, also can satisfy different real-time requirements, its data error rate is extremely low simultaneously, reliability is high, therefore, has obtained using widely in industry spot, be that a kind of framework is open, the new generation network communication technology of broadcast type, it also becomes unique fieldbus that international standard is arranged at present.
But because the rising of the continuous complicated and system scale of the applied Control Network structure of CAN bus, manually in the CAN bus between the node or the detection of opening circuit of tail end circuit with recover also to become to become increasingly complex, therefore, provide a kind of under the situation that the CAN bus opens circuit, can detect automatically with the device that recovers the normal transmission of CAN bus has become the problem that present technique field personnel need solve.
Summary of the invention
Technical scheme to be solved of the present invention provides a kind of CAN bus self detection recovery device and method.
For solving technique scheme, the invention provides a kind of CAN bus self detection recovery device, be used to have the CAN bus of at least 2 CAN nodes and terminate load, it comprises CAN bus verification signal projector and the answer signal receiver that is connected on the described CAN bus, it is characterized in that described CAN bus self detection recovery device also comprises: standby bus; Control unit; And between the described CAN bus of adjacent C AN node, the node restorer that is provided with respectively between the described CAN bus of last CAN node and described terminate load, wherein, each node restorer comprises again: additional load; And the controlled connector that described additional load and described CAN bus, described additional load and described standby bus, described standby bus and described CAN bus can be coupled together respectively; Described control unit is used to control described controlled connector and starts.
Preferable, described CAN bus self-resetting devices also is included in described control unit control down, and the node that corresponding CAN node is inserted described CAN bus or described standby bus connects adjuster; Described node connects adjuster and comprises 2 single-pole double-throw switch (SPDT)s.
Preferably, described control unit is a microprocessor.
Preferably, described microprocessor is included in described CAN intranodal.
Preferably, described controlled connector comprises relay that is connected with described microprocessor and the switch that is connected with described relay.
Preferably, described additional load is a resistance.
Preferably, each CAN node also comprises the CAN bus transceiver.
The present invention also provides a kind of CAN bus self-recovery method, it is characterized in that, may further comprise the steps:
Steps A, CAN bus verification signal projector send validation signal according to preset rules to each CAN node, and each CAN node that can receive described validation signal transmits corresponding answer signal to the answer signal receiver;
Step B, judge according to the received answer signal of described answer signal receiver whether described CAN bus breaks down, if, then make each node control unit that restorer has start corresponding controlled connector one by one, corresponding additional load is connected, so that detect the position that fault took place on the described CAN bus with described CAN bus;
Step C, according to detected abort situation, make the control unit at described abort situation place start corresponding controlled connector, the standby bus of correspondent section is connected with described CAN bus, and start follow-up each control unit, to control follow-up node connection restorer follow-up CAN node is inserted standby bus.
Preferably, in step B, if n CAN node and n+1 the internodal additional load of CAN are with after described CAN bus is connected, described answer signal receiver can receive corresponding answer signal, and n+1 CAN node and n+2 the internodal additional load of CAN are with after described CAN bus is connected, described answer signal receiver can not receive corresponding answer signal, then detects fault took place on the described CAN bus position between n CAN node and n+2 CAN node.
Beneficial effect of the present invention is: can detect automatically and the breakpoint that recovers in the CAN bus, and cost is lower.
Description of drawings
Fig. 1 is a CAN bus self detection recovery device structural representation provided by the invention.
Fig. 2 is the structural representation of node restorer.
The connection diagram of the controlled connector of Fig. 3 to Fig. 5 under different conditions.
Fig. 6 detects the restoration methods flow chart certainly for CAN bus provided by the invention.
Fig. 7 to Fig. 8 understands for simplicity for the open circuit schematic diagram of bus of node restorer reparation, has omitted node among the figure and connected adjuster.
Fig. 9 is the CAN bus self detection recovery device structural representation of another embodiment.
Embodiment
Describe the preferred embodiments of the present invention in detail below in conjunction with accompanying drawing.
See also Fig. 1, CAN bus self detection recovery device provided by the invention comprises CAN bus 4, is connected with 1, at least 2 CAN nodes 2 of CAN bus verification signal projector and answer signal receiver, 3, at least 2 node restorers of terminal resistance 5 and at least 2 nodes on the described CAN bus 4 and connects adjuster 9.Each CAN node 2 comprises CAN bus transceiver and MPU (microprocessor), described CAN bus transceiver inserts CAN bus 4 and is connected with described MPU, each CAN node 2 is connected with a node restorer 5 by described MPU, each CAN node 2 is connected with CAN bus 4 by node adjuster 9, and node adjuster 9 is controlled by described MPU.Described CAN bus self detection recovery device also comprises standby bus 6, and terminal resistance 3 inserts standby bus 6, and standby bus 6 connects all node restorers 5 and node connects adjuster 9.
See also Fig. 2, node restorer 5 comprises additional resistance 7 and 2 controlled connectors 8,2 controlled connectors 8 are inserted at the two ends of additional resistance 7 respectively, controlled connector 8 comprises the switch that the relay that links to each other with described MPU links to each other with described relay, under the control of described MPU, controlled connector 8 can connect (as shown in Figure 3) with CAN bus 4 and standby bus, or additional resistance 7 is connected (as shown in Figure 4) with CAN bus 4, or additional resistance 7 is connected (as shown in Figure 5) with standby bus 6.
Node connects adjuster 9 and comprises 2 single-pole double-throw switch (SPDT)s, CAN node 2 can be connected CAN bus 4 or standby bus 6 under MPU control.
CAN node with the most close CAN bus verification signal projector and answer signal receiver 1 is the 1st a CAN node, is the 2nd CAN node, m CAN node of the 3rd CAN node to the in turn along CAN bus 4, and wherein, m is the quantity of CAN node.Under the normal situation of communication, described CAN bus transceiver in CAN bus verification signal projector and answer signal receiver 1 and the CAN node 2 can communicate dialogue, but if CAN bus 4 opens circuit, then CAN bus verification signal projector and answer signal receiver 1 can't be received the reply message of CAN node, for this reason, the invention provides the CAN bus from detecting restoration methods, see also Fig. 6, this method may further comprise the steps:
Step 1, CAN bus verification signal projector send validation signal according to preset rules to each CAN node 2, and each CAN node 2 that can receive described validation signal transmits corresponding answer signal to the answer signal receiver;
Step 2, judge according to the received answer signal of described answer signal receiver whether described CAN bus breaks down, if, CAN bus verification signal projector sends short-circuit signal, after described CAN bus transceiver is received above-mentioned short-circuit signal, since the 1st CAN node, control controlled connector 8 by MPU, make additional resistance 7 two ends in the CAN node 2 connect CAN bus 4, with CAN bus 4 partial short circuits, the additional resistance 7 of this moment has temporarily substituted terminal resistance 3;
Step 3, if can proper communication after the short circuit, additional resistance 7 is disconnected and being connected of CAN bus 4, make the additional resistance 7 two ends connection CAN bus 4 in the next CAN node 2, with CAN bus 4 partial short circuits;
Step 4, repeating step 3 until n CAN node and n+1 the internodal additional load of CAN with after described CAN bus is connected, described answer signal receiver can receive corresponding answer signal, and n+1 CAN node and n+2 the internodal additional load of CAN are with after described CAN bus is connected, described answer signal receiver can not receive corresponding answer signal, then detects fault took place on the described CAN bus position between n CAN node and n+2 CAN node;
Step 5, CAN bus verification signal projector sends restoring signal, MPU controls controlled connector 8,2 controlled connectors 8 by n CAN node are connected the CAN bus with standby bus, then standby bus has substituted the partial C AN bus (as shown in Figure 7) that originally opens circuit, the MPU of n node sends the signal of regulating CAN node tie-in line by CAN bus verification signal projector and answer signal receiver 1 to the MPU of subsequent node simultaneously, then the MPU Control Node of subsequent node is regulated connector 9, follow-up CAN node 2 is inserted standby bus 6, form complete communication loop.
If have a plurality of trip points in the CAN bus, then standby bus and CAN bus can repeatedly be replaced mutually, form complete communication loop (as shown in Figure 8).
See also Fig. 9, in another embodiment, node restorer 5 can comprise that also node connects the function of adjuster 9, then in the CAN node 2 access node restorers 5.
" n " in the said method is not a fixed numeric values, but the numbering of CAN node is to change.
Above embodiment is the unrestricted technical scheme of the present invention in order to explanation only.Any modification or partial replacement that does not break away from spirit and scope of the invention all should be encompassed in the middle of the claim scope of the present invention, can substitute with the load that is equal to as, terminal resistance, and MPU can substitute with the control corresponding unit etc.

Claims (9)

1, a kind of CAN bus self detection recovery device, be used to have the CAN bus of at least 2 CAN nodes and terminate load, it comprises CAN bus verification signal projector and the answer signal receiver that is connected on the described CAN bus, it is characterized in that described CAN bus self detection recovery device also comprises:
Standby bus;
Control unit; And
Between the described CAN bus of adjacent C AN node, the node restorer that is provided with respectively between the described CAN bus of last CAN node and described terminate load, wherein, each node restorer comprises again:
Additional load; And
The controlled connector that described additional load and described CAN bus, described additional load and described standby bus, described standby bus and described CAN bus can be coupled together respectively;
Described control unit is used to control described controlled connector and starts.
2, CAN bus self-resetting devices according to claim 1 is characterized in that: also be included in described control unit control down, the node that corresponding CAN node is inserted described CAN bus or described standby bus connects adjuster; Described node connects adjuster and comprises 2 single-pole double-throw switch (SPDT)s.
3, CAN bus self detection recovery device as claimed in claim 1 or 2 is characterized in that: described control unit is a microprocessor.
4, CAN bus self detection recovery device as claimed in claim 3 is characterized in that: described microprocessor is included in described CAN intranodal.
5, CAN bus self detection recovery device as claimed in claim 3 is characterized in that: described controlled connector comprises relay that is connected with described microprocessor and the switch that is connected with described relay.
6, CAN bus self detection recovery device as claimed in claim 1 is characterized in that: described additional load is a resistance.
7, CAN bus self-resetting devices as claimed in claim 1, it is characterized in that: each CAN node also comprises the CAN bus transceiver.
8, a kind of CAN bus is characterized in that from detecting restoration methods, may further comprise the steps:
Steps A, CAN bus verification signal projector send validation signal according to preset rules to each CAN node, and each CAN node that can receive described validation signal transmits corresponding answer signal to the answer signal receiver;
Step B, judge according to the received answer signal of described answer signal receiver whether described CAN bus breaks down, if, then make each node control unit that restorer has start corresponding controlled connector one by one, corresponding additional load is connected, so that detect the position that fault took place on the described CAN bus with described CAN bus;
Step C, according to detected abort situation, make the control unit at described abort situation place start corresponding controlled connector, the standby bus of correspondent section is connected with described CAN bus, and start follow-up each control unit, to control follow-up node connection restorer follow-up CAN node is inserted standby bus.
9, CAN bus as claimed in claim 8 is from detecting restoration methods, it is characterized in that, in step B, if n CAN node and n+1 the internodal additional load of CAN are with after described CAN bus is connected, described answer signal receiver can receive corresponding answer signal, and n+1 CAN node and n+2 the internodal additional load of CAN are with after described CAN bus is connected, described answer signal receiver can not receive corresponding answer signal, then detects fault took place on the described CAN bus position between n CAN node and n+2 CAN node.
CN2009100459308A 2009-01-22 2009-01-22 CAN bus self detection recovery device and method Expired - Fee Related CN101494571B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009100459308A CN101494571B (en) 2009-01-22 2009-01-22 CAN bus self detection recovery device and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009100459308A CN101494571B (en) 2009-01-22 2009-01-22 CAN bus self detection recovery device and method

Publications (2)

Publication Number Publication Date
CN101494571A true CN101494571A (en) 2009-07-29
CN101494571B CN101494571B (en) 2011-09-21

Family

ID=40924987

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2009100459308A Expired - Fee Related CN101494571B (en) 2009-01-22 2009-01-22 CAN bus self detection recovery device and method

Country Status (1)

Country Link
CN (1) CN101494571B (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102611600A (en) * 2012-03-01 2012-07-25 三一重工股份有限公司 Method and device for locating short circuit position of CAN (Controller Area Network) network
CN103259686A (en) * 2013-05-31 2013-08-21 浙江大学 CAN bus network fault diagnosis method based on disperse error events
CN103425123A (en) * 2013-08-15 2013-12-04 上海固泰科技有限公司 Automated testing method for CAN (controller area network) bus based on software script
CN103475523A (en) * 2013-09-10 2013-12-25 浙江大学 CAN bus analysis system with bus error analysis function
CN104363032A (en) * 2014-10-29 2015-02-18 三一汽车起重机械有限公司 Communication line self repairing system, bus network and engineering machine
CN105182151A (en) * 2014-05-27 2015-12-23 通用汽车环球科技运作有限责任公司 Vmethod and apparatus for open-wire fault detection and diagnosis in a controller area network
CN105425780A (en) * 2015-12-23 2016-03-23 上海华兴数字科技有限公司 Bus fault self-diagnosis device
CN106302063A (en) * 2016-08-12 2017-01-04 深圳市沃特玛电池有限公司 CAN communication line Circuits System and terminal resistance connection control method thereof
CN109245864A (en) * 2018-11-27 2019-01-18 威海威高生物科技有限公司 ETH-CAN communication front-end detection device and wrong self checking method based on self feed back
CN111308922A (en) * 2019-07-30 2020-06-19 厦门雅迅网络股份有限公司 Method for preventing CAN bus from sending error frame and CAN bus equipment

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102611600A (en) * 2012-03-01 2012-07-25 三一重工股份有限公司 Method and device for locating short circuit position of CAN (Controller Area Network) network
CN102611600B (en) * 2012-03-01 2014-12-10 三一重工股份有限公司 Method and device for locating short circuit position of CAN (Controller Area Network) network
CN103259686A (en) * 2013-05-31 2013-08-21 浙江大学 CAN bus network fault diagnosis method based on disperse error events
CN103259686B (en) * 2013-05-31 2016-04-27 浙江大学 Based on the CAN network fault diagnosis method of isolated errors event
CN103425123A (en) * 2013-08-15 2013-12-04 上海固泰科技有限公司 Automated testing method for CAN (controller area network) bus based on software script
CN103475523B (en) * 2013-09-10 2016-04-27 浙江大学 With the CAN analytical system of bus error analytical capabilities
CN103475523A (en) * 2013-09-10 2013-12-25 浙江大学 CAN bus analysis system with bus error analysis function
CN105182151A (en) * 2014-05-27 2015-12-23 通用汽车环球科技运作有限责任公司 Vmethod and apparatus for open-wire fault detection and diagnosis in a controller area network
CN105182151B (en) * 2014-05-27 2018-10-09 通用汽车环球科技运作有限责任公司 Method and apparatus for the breaking line fault detect and diagnose in controller local area network
CN104363032A (en) * 2014-10-29 2015-02-18 三一汽车起重机械有限公司 Communication line self repairing system, bus network and engineering machine
CN104363032B (en) * 2014-10-29 2017-03-08 三一汽车起重机械有限公司 communication line self-repairing system, communication line and engineering machinery
CN105425780A (en) * 2015-12-23 2016-03-23 上海华兴数字科技有限公司 Bus fault self-diagnosis device
CN105425780B (en) * 2015-12-23 2018-05-15 上海华兴数字科技有限公司 A kind of bus failure self-diagnosis system
CN106302063A (en) * 2016-08-12 2017-01-04 深圳市沃特玛电池有限公司 CAN communication line Circuits System and terminal resistance connection control method thereof
CN109245864A (en) * 2018-11-27 2019-01-18 威海威高生物科技有限公司 ETH-CAN communication front-end detection device and wrong self checking method based on self feed back
CN109245864B (en) * 2018-11-27 2023-09-19 威海威高生物科技有限公司 ETH-CAN communication front-end detection device based on self-feedback and error self-detection method
CN111308922A (en) * 2019-07-30 2020-06-19 厦门雅迅网络股份有限公司 Method for preventing CAN bus from sending error frame and CAN bus equipment
CN111308922B (en) * 2019-07-30 2021-01-15 厦门雅迅网络股份有限公司 Method for preventing CAN bus from sending error frame and CAN bus equipment

Also Published As

Publication number Publication date
CN101494571B (en) 2011-09-21

Similar Documents

Publication Publication Date Title
CN101494571B (en) CAN bus self detection recovery device and method
CN105700510B (en) The disperse errors detection method and CAN communication system of CAN communication system
CN101520744B (en) Self-checking serial communication system and self-checking method thereof
CN106658565B (en) Multilink preferred transmission method and device for wireless communication of rail transit train-ground
CN103780365A (en) Method and system for dynamically transmitting multilink redundant data
CN201095374Y (en) Track circuit for computer network
CN102752145B (en) Novel detecting and isolating system for fault of RS-485 port and method thereof
CN103781691A (en) Centralized control station computer
CN207939513U (en) A kind of optic fiber converter having ring redundancy networking capability
CN103001808B (en) A kind of port failure detection interchanger and implementation method
CN209813737U (en) Magnetic-levitation train and levitation control system and controller thereof
CN108289050B (en) Ring network control system and control method for transmitter
CN113114551B (en) Dual-redundancy LIN bus communication device
CN102394734A (en) RS 485 communication system with nonpolarized connection and control method thereof
CN101894056A (en) Bus and working node isolation device and fault recovery system and method thereof
CN102710483A (en) RS485 (Recommended Standard 485) intelligent loop
CN101659271A (en) Method for connecting station ATS with interlocking subsystem
CN116647424A (en) Method for automatically recovering faults of CAN bus system of single ring network
CN116149301A (en) Fault diagnosis device and method and vehicle
CN102681515A (en) Redundant circuit and redundancy conversion method
CN201541271U (en) Partial bus node automatic recovery device
CN101659270A (en) Method for connecting station ATS with station ATO
CN105278433B (en) A kind of number adopts instrument and mends the method and apparatus for passing data automatically
CN101520660A (en) Simulation device and simulation method for monitoring sensor signals in general environment
CN109067567B (en) Network communication interruption diagnosis method

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
ASS Succession or assignment of patent right

Owner name: SHANGHAI BOOM FIBER SENSING TECHNOLOGY CO., LTD.

Free format text: FORMER OWNER: SHANGHAI HUAWEI AT CO., LTD.

Effective date: 20100910

C41 Transfer of patent application or patent right or utility model
COR Change of bibliographic data

Free format text: CORRECT: ADDRESS; FROM: 201711 ROOM 701B, YUNFENG BUILDING, LANE 31, ZHAOZHONG ROAD, ZHAOTUN TOWN, QINGPU DISTRICT, SHANGHAI CITY TO: 201711 ROOM 701B, YUNFENG BUILDING, NO.2, LANE 31, ZHAOZHONG ROAD, ZHAOTUN TOWN, QINGPU DISTRICT, SHANGHAI CITY

TA01 Transfer of patent application right

Effective date of registration: 20100910

Address after: Qingpu District of Shanghai city in 201711 Zhao Tun Zhen Zhao road 31 Lane 2, Yunfeng building 701 room B

Applicant after: Shanghai Boom Fiber Sensing Technology Co., Ltd.

Address before: Qingpu District of Shanghai city in 201711 Zhao Tun Zhen Zhao Yunfeng road 31 Lane building 701 room B

Applicant before: SHANGHAI HUAWEI AT Co., Ltd.

C14 Grant of patent or utility model
GR01 Patent grant
ASS Succession or assignment of patent right

Owner name: STATE GRID LIAONING ELECTRIC POWER CO., LTD. ELECT

Effective date: 20131127

C41 Transfer of patent application or patent right or utility model
C53 Correction of patent for invention or patent application
CB03 Change of inventor or designer information

Inventor after: Zhou Zhengxian

Inventor after: Tong Fangxuan

Inventor after: Liu Liang

Inventor after: Zhang Dacheng

Inventor after: Hu Bo

Inventor after: Song Yundong

Inventor after: Liang Huabing

Inventor after: Zhang Xiaohui

Inventor before: Zhou Zhengxian

Inventor before: Tong Fangxuan

Inventor before: Liu Liang

Inventor before: Zhang Dacheng

COR Change of bibliographic data

Free format text: CORRECT: INVENTOR; FROM: ZHOU ZHENGXIAN TONG FANGXUAN LIU LIANG ZHANG DACHENG TO: ZHOU ZHENGXIAN TONG FANGXUAN LIU LIANG ZHANG DACHENG HU BO SONG YUNDONG LIANG HUABING ZHANG XIAOHUI

TR01 Transfer of patent right

Effective date of registration: 20131127

Address after: Qingpu District of Shanghai city in 201711 Zhao Tun Zhen Zhao road 31 Lane 2, Yunfeng building 701 room B

Patentee after: Shanghai Boom Fiber Sensing Technology Co., Ltd.

Patentee after: Electric Power Research Institute of State Grid Liaoning Electric Power Co., Ltd.

Address before: Qingpu District of Shanghai city in 201711 Zhao Tun Zhen Zhao road 31 Lane 2, Yunfeng building 701 room B

Patentee before: Shanghai Boom Fiber Sensing Technology Co., Ltd.

CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110921

Termination date: 20170122

CF01 Termination of patent right due to non-payment of annual fee