CN1276445C - Electron linkage fastener and its working process - Google PatentsElectron linkage fastener and its working process Download PDF
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- CN1276445C CN1276445C CNB021355282A CN02135528A CN1276445C CN 1276445 C CN1276445 C CN 1276445C CN B021355282 A CNB021355282 A CN B021355282A CN 02135528 A CN02135528 A CN 02135528A CN 1276445 C CN1276445 C CN 1276445C
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The invention belongs to the manipulation and the control field of the interlocking device of two or more switch rooms, relate in particular to a kind of electron linkage fastener that is used to prevent the electric power system misoperation.
The electric power misoperation fault is the formidable enemy of safe operation of power system, and misoperation the lighter causes large-area power-cuts each time, and weight person causes casualties and the serious consequence of device damage.Therefore, stopping misoperation becomes and is engaged in the important topic that electric power safety work and anti-error worker study intensively for a long time always.Anti-locking device is installed, is prevented the generation of pernicious misoperation fault, become a technical policy and carried out in electric power system and switchgear manufacturing sector.
The anti-misoperation locking mode mainly contains following several at present: mechanical latching, procedure lock, electrical interlock and electromagnetic lock and microcomputer locking.
Wherein mechanical latching is to reach the locking requirement of action successively with the mechanical mechanism that conditions each other and link between the operating position of switch cubicle.Mechanical latching need not to use auxiliary operations such as key in operating process, can realize correctly carrying out release step by step automatically with operating sequence.When misoperation takes place, can realize automatic blocking, stop the carrying out of misoperation.Yet mechanical latching can only be used between switch cubicle internal mechanical action region of interest, and getting in touch with mechanical latching and can't realize between the electric elements action.To between two cabinets or the locking between the outer controller switching equipment of switch cubicle and cabinet require also beyond one's ability to help.So on switch cubicle, can only also need be aided with other blocking methods, can reach all " five is anti-" requirement based on mechanical latching.
Procedure lock (or claiming Mechanically programm's lock) is the requirement that reaches unlock operation successively with key with operation sequence transmission or displacement.Its great advantage is the restriction that the key transmission is not subjected to distance, so range of application is wider.Between other electric equipment beyond switch cubicle and its, and outdoor power distribution unit, indoor compartment power distribution equipment all suit to reach the locking requirement with procedure lock.Procedure lock has the transmission of key and the auxiliary movement of key number change in operating process, limit the requirement of the operating sequence of the condition of unblanking in the match operation ticket, and is in full accord with the track route of stipulating in the operation order, so also accepted by operating personnel easily.Procedure lock in use institute's exposed problems is: bite phenomenon in various degree appears in (1) procedure lock in operation.(2) procedure lock not tool prevent from instead to send electricity and prevent the function of mistakenly entering charged chamber.When (3) procedure lock uses, must start anew, the centre can not be interrupted.When transformer station adopts the Microcomputer Protection controlling schemes or runs into the link that can not adorn procedure lock, procedure lock just can not use.
Electrical interlock is the exclusive circuit that forms by appliance contact and electric wiring, and electromagnetic lock is then as the executive component of locking, so both are interdependent.Electric-magnetic lock is the electromagnetic mechanism action by solenoid, realizes unlocking operation, is indispensable blocking element in preventing the locking link of mistakenly entering charged chamber.The advantage of electric-magnetic lock is easy to operate, does not have auxiliary movement, but also has following outstanding problem in installing and using: when (1) in general electromagnetic lock uses separately, have only unlocking function not have reverse blocking function.Needs and electrical interlock circuit are used just can have forward and reverse blocking function.(2) need cabling, increase extra construction volume.(3) need seal in the auxiliary contact of operating mechanism, auxiliary contact are easy to generate loose contact and influence the reliability of action, and (4) when complicated loop was operated, key quantity was many and transmittance process is complicated.
The microcomputer locking, it is made up of intelligent simulation board, industrial computer, computer key and various lockset (based on the coding padlock).By the operation on intelligent simulation board, operational order is sent into industrial computer, get operation order, simultaneously by serial communication, operation order is imported among the computer key, remove to open the coding lock that is loaded on each operating position again with computer key then, operate.
Through operation for many years, find that there is following problem in it: (1) structure more complicated, high to operator's technical merit requirement, the operating time is long.(2) the device price is higher, is difficult to bear for a fairly large number of 110kV and following change, power distribution station.(3) the lockset kind is complete inadequately, and blocking function must be further perfect, and the padlock of particularly encoding still can not be carried out forced blocking at present, has serious " walking idle running " phenomenon.(4) the cooperation defective tightness that is connected with the mechanical latching of switch cubicle.Some user removes the original mechanical latching of switch cubicle in order to adorn the microcomputer locking, and cost certainly will increase, and causes unnecessary financial burden to the user.
In the application of above-mentioned various locking devices, anti-" walking idle running " problem becomes the key of stopping the misoperation problem.So-called " walking idle running " do not carry out practical operation after just being meant and opening locking device in the grid switching operation process, just carries out unblanking and operating of next step content of operation, and the misoperation fault that causes, " walking idle running " is the latency that operating accident takes place.Anti-" walking idle running " function problem of locking device (next step can be jumped into without operation in the back that prevents to unblank) has proposed for many years, and national departments concerned will prevent that the requirement of " walking idle running " write into " high voltage electric equipment anti-misoperation locking device technical conditions ".
September 16 1998 day for announcing, a kind of electromagnetism program conversion lock is disclosed in the Chinese patent of notification number CN 2291470, comprise that lock body, pellet shot from a slingshot are to, mandrel and electromagnetic lock, suit mandrel in the lock body, binding post is installed on the lock body, have keyhole in lock body one side, the opposite side of lock body has pin holes and is connected with binding post, it is characterized in that suit mandrel in the lock body, have keyhole in lock body one side, corresponding to having slide groove on the lock body of keyhole and the mandrel, it is inner, and that pellet shot from a slingshot is installed is right, handwheel, plug-in mounting electromagnetic lock in pin holes are installed in the end of mandrel.Its advantage is easy to operate, there is not auxiliary movement, but in installing and using, exist and need cabling, increase extra construction volume, the construction or the reconstruction work of outdoor locking scheme brought the problem of very big inconvenience, and in transmission process, in order to make the program key belong to controllable state, need on lockset, increase sensitive switch, get involved the combined floodgate control loop of circuit breaker, this be the user do not wish to occur.
The January 10 calendar year 2001 day for announcing, a kind of microcomputer linkage fastener is disclosed in the Chinese patent of notification number CN 2414457, comprise computer key and lockset, wherein computer key comprises that microprocessor and photoelectricity adopts a yard module, lockset is provided with photoelectric coding, mechanical variable code and electro-optical feedback, on computer key, be provided with display module, power monitoring module, memory module and serial communication module, adopt contactless sign indicating number, the system controlled by computer of adopting.Its blocking function is complete, and intelligent degree height is easy to use, and performance but can form waste on the function accurately and reliably when being actually used in outdoor locking scheme, and cost increases, and causes unnecessary financial burden to the user.
Summary of the invention
Goal of the invention of the present invention provides and a kind ofly need not cable laying line and external power supply, can stop " walking idle running " phenomenon, can and open and close that bolt spare is controlled lockset and can realize fool proof electron linkage fastener of interlock and workflow thereof with conventional program lock or mechanical latching by operating sequence.
Technical scheme of the present invention is: a kind of electron linkage fastener is provided, comprise lockset and with the electron key of its coupling, lockset is provided with the information output unit that is used to detect lockset and on off state, electron key is provided with lockset and on off state information acquisition unit, control unit, operation information display unit, solenoid actuated unit and the power subsystem that is used to accept above-mentioned information output unit signal, it is characterized in that: set up the programmable logic device unit on electron key; Lockset and on off state information acquisition unit are connected with control unit with the operation information display unit through the programmable logic device unit; Control unit is connected with the solenoid actuated unit; Power subsystem is connected with said units, for said units provides power supply.
Further, described control unit also is connected with power supply supervision unit with alarm unit.
Its described alarm unit is buzzer or loudspeaker, and described power supply supervision unit is a μ P supervisory circuit.
Its described programmable logic device unit is complicated programmable logic device CPLD or on-site programmable gate array FPGA.
Its described lockset and on off state information acquisition unit comprise lockset coding Acquisition Circuit, mechanical variable code Acquisition Circuit and electro-optical feedback Acquisition Circuit.
Its described lockset coding Acquisition Circuit, mechanical variable code Acquisition Circuit are adopted decoding circuit and/or the contactless decoding circuit of adopting of photoelectricity for the sensitive switch contact.
Its described programmable logic device unit is by reading the output signal of lockset and on off state information acquisition unit, the state information of lockset and switch is passed to control unit, accept control unit result relatively, the result is sent into the operation information display unit carry out the dynamic scan demonstration.
Compared with the prior art, advantage of the present invention is:
1. adopt programmable logic device unit (complicated programmable logic device CPLD or on-site programmable gate array FPGA) to realize logic determines and logic control in conjunction with lockset coding, electro-optical feedback and mechanical variable code, solved the problem of laying cable in the outdoor program locking scheme, safe and reliable quick.
2. the lockset that uses of electron key and match and the formation closed loop of control loop with it, read lock status by electro-optical feedback, utilize mechanical variable code to stop " walking idle running " phenomenon, can prevent that charged ground connection and solution from preventing problems such as mistakenly entering charged chamber, thereby realize anti-misoperation.
3. by logic relatively and judge, can realize many groups switch of transformer and distribution station (station) is carried out the transmission or not or the grid switching operation of " one to one ", " many-one " or " one-to-many " " follow procedure, according to condition ".
4. its lockset and blocking mechanism absorb and have kept the major advantage of conventional blocking lock, electronic control part has been broken the pattern of general microcomputer locking, not only on being provided with, system greatly simplifies, and can form succinct, the most rational linkage lock system with procedure lock in the simple circuit and mechanical latching, greatly reduce the cost of locking device, and blocking function is more perfect, and operating process is more simple.
5. compact conformation, antijamming capability is strong, and is easy to operate, and extended capability is strong, makes up flexible and changeablely, can fully adapt to changeable transformer station's locking scheme.
6. compare with microcomputer linkage lock scheme with conventional linkage lock scheme, have more advantage technical and economically.
Description of drawings
The present invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is the electrical principle block diagram of electron key of the present invention;
Fig. 2 is the electrical principle block diagram of electron key embodiment;
Fig. 3 is the line map of electron key embodiment programmable logic device unit;
Fig. 4 is the line map of electron key embodiment control unit and power supply supervision unit;
Fig. 5 is a workflow schematic diagram of the present invention;
Fig. 6 is the workflow diagram of embodiment of the invention electron key programmable logic device unit;
Fig. 7 is the workflow diagram of embodiment of the invention electron key control unit.
Among Fig. 1, in the electric wiring part of electron key, by lockset coding Acquisition Circuit, the lockset of mechanical variable code Acquisition Circuit and electro-optical feedback Acquisition Circuit formation and the output of on off state information acquisition unit are connected with the I/O port of the programmable logic device unit that is made of complicated programmable logic device CPLD (abbreviation of Complex Programmable Logic Device) or on-site programmable gate array FPGA (abbreviation of FieldProgrammable Gate Array), the I/O port of programmable logic device unit is connected with the input of operation information display unit (light-emitting diode and/or LED charactron) and the I/O port of control unit, the I/O port of control unit is connected with the control end of solenoid actuated unit, power subsystem (not drawing among the figure) is connected with said units, for said units provides power supply.
Among Fig. 2, in the electric wiring of the electron key part, the I/O port of control unit also is connected with power supply supervision unit with alarm unit; Wherein, alarm unit is buzzer or loudspeaker, and power supply supervision unit is μ P (Microprocessor, an i.e. microprocessor) supervisory circuit, and power subsystem (not drawing among the figure) also is connected with said units.
Among Fig. 3 and Fig. 4, the programmable logic device unit comprises integrated circuit U3, U7, resistance R 4, capacitor C 7 and socket P4; Control unit comprises integrated circuit U1, U2, resistance R 14, R15, capacitor C 1, C2 and crystal oscillator XT; μ P supervisory circuit comprises integrated circuit U6; Wherein, the TCK of integrated circuit U3, TD OUT, TD IN and TMS pin respectively with 3 of socket P4,4,5 are connected with 6 pins are corresponding, the GSR pin of integrated circuit U3 is connected with the RST pin of integrated circuit U1, in its GTS2 pin and the I/O port 19～23,27, the corresponding connection of B0～B7 pin of chip is selected in 28 pins and led drive circuit stage casing, 29～32 pins in its I/O port and led drive circuit meta select the corresponding connection of B3～B0 pin of chip, 38 pins in its I/O port are connected with the output GDFKCM of electro-optical feedback Acquisition Circuit, 39 pins in its I/O port are connected with mechanical variable code Acquisition Circuit output JXBMDR, the corresponding connection of output SJBMDR of GCK2 pin in its I/O port and 1～8 pin and lockset coding Acquisition Circuit, in its I/O port 12～14,16,18 with 40～42 pins respectively with integrated circuit U1 P1.0～the P1.7 pin is corresponding is connected, its GCK1 pin is connected with the Q pin of integrated circuit U7 and is connected with the TRIG pin with the THR of integrated circuit U7 through resistance R 4; R pin and the V of integrated circuit U7 CCPin and power supply V CCConnect, its TRIG pin is through capacitor C 7 ground connection, its GND pin ground connection; 1 pin of socket P4 and power supply V CCConnect 2 pin ground connection; The P1.0 of integrated circuit U1～P1.7 pin respectively with the I/O port of integrated circuit U3 in 12～14,16,18 be connected with 40～42 pins are corresponding, its P3.0/RXD pin is connected with the input FMQQD of buzzer, its P3.1/TXD pin is connected with the input DCTQD of solenoid driver circuit, its P3.2/INT0 is connected with the SDA pin is corresponding with the SCL of integrated circuit U2 respectively with the P3.3/INT1 pin, its RST pin is connected with the RST pin of integrated circuit U6, and its X1 is connected with the two ends of crystal oscillator XT with the X2 pin and respectively through capacitor C 1 and C2 ground connection; A0～A2 of integrated circuit U2, WP and GND pin ground connection, its SCL and SDA pin are respectively through resistance R 14 and R15 and power supply V CCConnect its V CCPin and power supply V CCConnect; The RST pin of integrated circuit U1 is connected its GND pin ground connection, its V in the RST pin of integrated circuit U6 and the programmable logic device unit with the GSR pin of integrated circuit U3 in the control unit CCPin and power supply V CCConnect.
Integrated circuit U3 (being the CPLD/FPGA chip) mainly finishes following function:
1. read the lockset coding by lockset and on off state information acquisition unit from lockset;
2. obtain mechanical variable code and electro-optical feedback signal by lockset and on off state information acquisition unit from lockset;
3. handle above-mentioned lockset and on off state information coding, it is passed to single-chip microcomputer (Microcomputer Unit--MCU, i.e. integrated circuit U1);
4. accept single-chip microcomputer (MCU) result relatively;
5. the result is sent into LED and carry out the dynamic scan demonstration.
Integrated circuit U7 is that programmable logic device unit (CPLD/FPGA chip) provides a fixing operating frequency, also can utilize crystal oscillator to obtain.Reset signal is provided by the reseting circuit of single-chip microprocessor MCU part, and the interface of socket P4 and CPLD/FPGA chip mainly carries out function and downloads reservation, is very important when debugging and perfect in shape and function.Other parts are just finished by the CPLD/FPGA chip internal, and external interface comprises that the lockset coding reads in, and mechanical variable code reads in electro-optical feedback and reads in, and (MCU, i.e. integrated circuit U1) carries out exchanges data with single-chip microcomputer, and the choosing of LED section, position choosing drive output.
It is to utilize hardware description language Verilog-HDL to be similar to the C language to programme like that the function of CPLD/FPGA chip realizes, carry out logic synthesis again, the copying checking utilizes socket P4 to download to chip internal at last again, and it just can carry out operate as normal according to the requirement of being programmed.
The sensitive switch contact that (being the reading in of lockset coding, mechanical variable code and electro-optical feedback signal of lockset) adopts because lockset and on off state information acquisition unit is adopted decoding circuit, contactless decoding circuit, operation electriomagnet loop and the led drive circuit adopted of photoelectricity is prior art, and its circuit constitutes and operation principle is no longer narrated at this.
The major function of integrated circuit U1 (single-chip microprocessor MCU) is:
1. from the CPLD/FPGA chip, read the address date of lockset, it is decoded as address information;
2. utilize the data message in the appropriate address in this address read access to memory (integrated circuit U2);
3. data are relatively judged the lockset state, and how decision is operated;
4. send the LED content displayed, control buzzer and electromagnet.
Integrated circuit U2 is I 2The flicker of C interface (flash) memory, the current state that is used to store on-the-spot lockset.
Integrated circuit U6 is a μ P supervisory circuit, for singlechip CPU provides electrification reset, power-off reset signal.During powering on, integrated circuit U6 produces the reset pulse of a fixed pulse width after supply voltage surpasses its thresholding that resets, and when power-supply fluctuation or drop to and also produce a reset pulse after being lower than the thresholding that resets, guarantees the working properly of Single Chip Microcomputer (SCM) system in any case.
In the said integrated circuit, that integrated circuit U1 adopts is the AT89C2051 that Atmel company produces, and also can adopt the singlechip chip of the models such as PIC Series P IC16C61 of 89 series of Philips company and Microchip company; Integrated circuit U2 can adopt AT24C04/08/16; Integrated circuit U3 can adopt the CPLD series 9536 of Xilinx company, and the equal chip of the Flex of altera corp series and Atmel company is all passable in addition; Integrated circuit U6 is the μ P supervisory circuit of IMP809L or other models, as IMP810/811/812 etc.; Integrated circuit U7 adopts the integrated circuit of 555 models.
Among Fig. 5, in the internal circuit of electron key, store whole transformer station and be installed on the coding of whole locking locksets at circuit breaker, isolating switch and ground connection disconnecting link place and the operation rules and the anti-error rule of switch.
After operating personnel insert the locking lockset of intending the console switch place with electron key, electron key reads the lockset coding of lockset by information acquisition unit, mechanical variable code and/or electro-optical feedback signal, then, electron key judges that according to the operation rules of its stored selected console switch could be operated, electron key is controlled the unlatching and the closure of this console switch place lockset in conjunction with the coding of desiring console switch place lockset, show and indication lockset coding and state by luminous tube and charactron, operating personnel divide/closing operation intending console switch according to the demonstration of electron key, after operation is finished, electron key reads mechanical variable code and/or the electro-optical feedback signal that is operated the switch lockset by information acquisition unit once more, detection is operated the displacement situation of switch, if really displacement, then allow the lockset locking, the operation that will be operated lockset and the switch simultaneously object information that puts in place deposits its internal circuit in, after above-mentioned steps was all finished, electron key just allowed operating personnel to carry out the relevant branch/closing operation of next switch.
Fig. 6 is the workflow diagram that utilizes the programmable logic device unit (CPLD/FPGA chip) of hardware description language Verilog-HDL programming, by this figure as can be known, programmable logic device is by reading the variation of electro-optical feedback, lockset coding and mechanical variable code, the state information of lockset and switch is passed to single-chip microcomputer (MCU), accept MCU result relatively, the result is sent into LED carry out the dynamic scan demonstration.
Among Fig. 7, single-chip microprocessor MCU reads the address date of lockset from the CPLD/FPGA chip, it is decoded as address information; Utilize the data message in the appropriate address in this address read access to memory; By the lockset address date relatively, judge the lockset state, determine how next step operates; If circuit breaker then reads electro-optical feedback, lockset coding and the mechanical variable code state of its lockset and deposits memory in; If isolating switch then judges whether to allow this isolating switch to operate by reading the state that deposits the respective circuit breakers in the memory in; If allow, then connect the LED displaying contents that the operation electriomagnet loop is carried out associative operation and exported corresponding operating information, electron key is by lockset and on off state information acquisition unit simultaneously, real-time checkout equipment " displacement " (promptly disconnecting or closure) situation is if " displacement " then allowed the lockset locking really; If do not allow, then export the LED displaying contents of corresponding operating error message, control buzzer output alarm information.
Operation principle of the present invention and process summary:
In transformer and distribution power station transmission or not operating process, according to the regulation of safety regulation for operations, when disconnecting switch operation, its pairing circuit breaker must be in off-state, and promptly isolating switch must not carry out branch, closing operation under electriferous state.So, before disconnecting switch operation, must check and verify branch, the "on" position of its pairing circuit breaker, only when its pairing circuit breaker is in gate-dividing state, just allow to carry out branch, the closing operation of isolating switch.
On the lockset that is installed on circuit breaker or isolating switch place, be equiped with by mechanical variable code mechanism and/or photoelectricity and become lockset and the on off state information output unit that the ink recorder structure is formed, lockset adopts the mode of mechanical contact that each lockset is carried out the lockset coding, and lockset provides an electro-optical feedback signal and a mechanical variable code signal simultaneously.The mechanical variable code signal derives from the state variation (being release or locking) of locking execution mechanism, the electro-optical feedback signal is from the operating mechanism of circuit breaker or isolating switch, is used for when the operating mechanism operation puts in place exporting the status signal of circuit breaker or isolating switch (disconnect or closed) to electron key by lockset.Can guarantee that like this electron key can not only discern lockset, can read the state of the switching device that links with lockset and the state of lockset self simultaneously, to stop the generation of " walking idle running " phenomenon.
The internal circuit of electron key has solidified coding and the operation rules that is installed on whole locksets at circuit breaker and isolating switch place in the whole transformer station program locking scheme.It reads coding and the electro-optical feedback signal that is loaded on circuit breaker place lockset by lockset and on off state information acquisition unit, judge according to operation rules whether isolating switch can be operated, control the unlatching and the closure of isolating switch place lockset again in conjunction with the coding of isolating switch place lockset; Prevent that by reading the mechanical variable code that is loaded on the isolating switch place lockset operation sequence from " walking idle running ", show and indication lockset coding and state by luminous tube and charactron (LED).
The present invention is mainly used in mechanism's locking of equipment manual-operating mechanism, is installed in fixed form on the operating mechanism of switchgear." tapered end " of lockset is installed in the movable position of operating mechanism, and the lock body of lockset is installed in the fixed position of equipment.During the lockset locking, the displacement of " tapered end " makes the movable position of equipment and the movable position can't relative motion at blocking, thus the whole locking of the equipment of realization.During the lockset release, detect lockset coding and device location state, and carry out five anti-logic determines according to this, confirm whether this operation is eligible by electron key.If ineligible, then can't release, and send and report to the police and coherent signal shows; If eligible, then electron key discharges release mechanism, the lockset release, and displacement once more takes place in " tapered end ", allows to carry out operation of equipment.Simultaneously, electron key is by lockset and on off state information acquisition unit, in real time checkout equipment " displacement " (promptly disconnect or closed) situation.If " displacement " then allowed the lockset locking really.After the operation of a certain branch (closing) lock was finished, the staff took off electron key, can carry out the next item down operation.
The present invention introduces electron controls technology on the basis of conventional blocking lock and the programmable logic device element produces, its lockset and blocking mechanism absorb and have kept the major advantage of conventional blocking lock, electronic control part has been broken the pattern of general microcomputer locking, not only on being provided with, system greatly simplifies, greatly reduce the cost of locking device, and blocking function is more perfect, and operating process is more simple.Electron key can be realized the use of " fool " formula, the requirement of intellectualized operation as a kind of anti-misoperation instrument.It is compared with microcomputer locking scheme with conventional linkage lock scheme, has more advantage technical and economically.
The present invention can by with the combining of procedure lock or mechanical locking device, constitute electronic program conversion lock, mechano-electronic conversion lock or composite lock.
Because the present invention adopts programmable logic device to realize logic determines and logic control in conjunction with lockset coding, electro-optical feedback and mechanical variable code, read lock status by electro-optical feedback, utilize mechanical variable code to stop " walking idle running " phenomenon, solved the problem of laying cable in the outdoor program locking scheme, safe and reliable quick, compact conformation, easy to operate, extended capability is strong, makes up flexible and changeable, can fully adapt to changeable transformer station's locking scheme, antijamming capability is strong.
The present invention can be widely used as the anti-incorrect manipulation deadlock device of 6～500KV change, the various indoor and outdoor of power distribution station (institute) type circuit breaker, isolating switch.
Priority Applications (1)
|Application Number||Priority Date||Filing Date||Title|
|CNB021355282A CN1276445C (en)||2002-09-10||2002-09-10||Electron linkage fastener and its working process|
Applications Claiming Priority (1)
|Application Number||Priority Date||Filing Date||Title|
|CNB021355282A CN1276445C (en)||2002-09-10||2002-09-10||Electron linkage fastener and its working process|
|Publication Number||Publication Date|
|CN1414584A CN1414584A (en)||2003-04-30|
|CN1276445C true CN1276445C (en)||2006-09-20|
Family Applications (1)
|Application Number||Title||Priority Date||Filing Date|
|CNB021355282A CN1276445C (en)||2002-09-10||2002-09-10||Electron linkage fastener and its working process|
Country Status (1)
|CN (1)||CN1276445C (en)|
Families Citing this family (4)
|Publication number||Priority date||Publication date||Assignee||Title|
|JP4850739B2 (en) *||2007-02-05||2012-01-11||キヤノン株式会社||Information processing apparatus and control method therefor, computer program, and image forming system|
|CN102061840B (en) *||2009-11-16||2012-10-03||珠海优特电力科技股份有限公司||Intelligent locking system and working method thereof|
|CN101789321B (en) *||2010-02-10||2012-06-27||湖北盛佳电器设备有限公司||Device for interlocking electronic high-voltage circuit breaker and high-voltage isolating switch|
|CN103514648B (en) *||2013-09-24||2016-01-27||上海人民电力设备股份有限公司||Safety interlocking timer|
- 2002-09-10 CN CNB021355282A patent/CN1276445C/en not_active IP Right Cessation
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