EP2113887A1 - Interrupteur à clé - Google Patents

Interrupteur à clé Download PDF

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Publication number
EP2113887A1
EP2113887A1 EP08008284A EP08008284A EP2113887A1 EP 2113887 A1 EP2113887 A1 EP 2113887A1 EP 08008284 A EP08008284 A EP 08008284A EP 08008284 A EP08008284 A EP 08008284A EP 2113887 A1 EP2113887 A1 EP 2113887A1
Authority
EP
European Patent Office
Prior art keywords
coding
key
key switch
excitation
inductance
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
EP08008284A
Other languages
German (de)
English (en)
Other versions
EP2113887B1 (fr
Inventor
Hans-Georg Dr. Köpken
Christiane Müller
Richard Schmidt
Günter Schwesig
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to EP08008284A priority Critical patent/EP2113887B1/fr
Priority to JP2009104035A priority patent/JP5111428B2/ja
Priority to US12/432,317 priority patent/US20090273437A1/en
Publication of EP2113887A1 publication Critical patent/EP2113887A1/fr
Application granted granted Critical
Publication of EP2113887B1 publication Critical patent/EP2113887B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00182—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C2009/00753—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys
    • G07C2009/00769—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means
    • G07C2009/00777—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means by induction

Definitions

  • the invention relates to a key switch and a corresponding keys associated with the key switch.
  • FIG. 1 is a commercially available control device 1 for operating a machine from automation technology, such as a machine tool, production machine and / or a robot shown having a commercially available mechanical key switch 2.
  • a machine from automation technology such as a machine tool, production machine and / or a robot shown having a commercially available mechanical key switch 2.
  • mechanical key switches With mechanical key switches, the key is scanned mechanically.
  • mechanical key switches have the disadvantage that the frequently occurring in an automation environment dirt, which is usually in the form of liquids, dust particles or aggressive gases, can bring about the key switch in the operating device and can lead to malfunction. Furthermore, the mechanics of the key switch itself can be damaged.
  • non-contact RFID systems instead of a key switch, other identification systems are also used, e.g. non-contact RFID systems. However, these systems are relatively expensive and expensive.
  • a key switch wherein the key switch has a first excitation device which generates a first alternating magnetic field and has a first inductance, wherein the key switch is constructed such that by means of the first magnetic alternating field a first coding of a key is scanned, the first coding causes a change in the first inductance of the first excitation means, and thus the first coding is read out by the key switch.
  • a key associated with the key switch wherein the key has a non-electrically conductive and non-magnetizable carrier element, wherein on the carrier element, a first coding of an electrically conductive and / or magnetizable material is arranged.
  • the first coding is read out serially by the key switch during the insertion process of the key. As a result, only a single first excitation means for reading the first encoding of the key is needed.
  • the key switch has several in the insertion direction of the key successively arranged first excitation means by means of which the first coding will read in parallel from the key switch. This allows a fast and particularly reliable reading of the first coding.
  • the key switch has a first excitation device which generates a first alternating magnetic field and has a first inductance
  • the key switch has a second excitation device which generates a second alternating magnetic field and has a second inductance
  • the key switch is constructed such that by means of the first magnetic alternating field, a first coding of a key is scanned, the first coding causes a change in the first inductance of the first excitation means and thus the first encoding is read from the key switch
  • the key switch is constructed in that a second coding of the key can be scanned by means of the second magnetic alternating field
  • the second coding effects a change of the second inductance of the second excitation device and thus the second coding is read out by the key switch
  • the first and the second coding are read out simultaneously the key switch determined by means of the first coding the position of the key in the key switch during the insertion process of the key.
  • the first excitation device is designed as a yoke wound around the one coil. This represents a particularly simple realization of the first excitation device.
  • the coil is designed as a planar coil.
  • the realization of the coil as a planar coil represents a particularly easy to manufacture way of realization of the coil.
  • the first coding and of an electrically conductive and / or magnetizable material influences the alternating magnetic field well.
  • the first coding as binary coding, bar coding, multilevel coding or is designed as an analog coding, since these codes are easy to implement.
  • the second coding is designed as analog coding. As a result, a particularly high level of security against manipulation of the key switch is achieved.
  • the key switch has a front plate with an opening for insertion of the key, wherein on the inside of the key switch, a non-electrically conductive and non-magnetizable separator is disposed at the opening, which spatially separates the opening of the first exciter , As a result, the ingress of dirt in the key switch and by the key switch in the interior of the control device is reliably prevented.
  • the key switch has a front plate with an opening for inserting the key, wherein on the inside of the key switch, a non-electrically conductive and non-magnetisable separating element is arranged at the opening which the opening of the first and the second Separates excitation device spatially.
  • the first coding as binary coding, bar coding, multilevel coding or is designed as an analog coding, since these codes are easy to implement.
  • the second coding is designed as an analog coding. As a result, a particularly high level of security against manipulation of the key switch is achieved.
  • the first coding is covered with an opaque layer. As a result, a replica of the key is difficult.
  • the second coding is covered with an opaque layer. As a result, a replica of the key is difficult.
  • the key switch has a plurality of access codes, wherein the key switch in accordance with an access code with the read first and / or second coding depending on the access code outputs a respective access code associated access signal.
  • a key 7 associated with the key switch is shown.
  • the key 7 consists of a non-conductive and non-magnetizable carrier element 8, on which a first coding 9 made of an electrically conductive and / or magnetizable material is attached.
  • the first coding 9 is read out serially by the key switch, by means of the first magnetic field B, the first code 9 attached to the key 7, by means of the first alternating magnetic field B, is scanned.
  • the first coding 9 is shown in FIG FIG. 2 from top to bottom through the yoke 3 and thus performed by the magnetic alternating field B.
  • the first coding 9 effects a change of the first inductance L of the first excitation device 6, as a result of which the first coding 9 is read out by the key switch.
  • the first coding 9 causes a change in the inductance L of the excitation device 6, as a result of which the current I changes, which is evaluated by the evaluation device 10.
  • the evaluation unit 10 measures the alternating current I which, as already mentioned, changes according to the first coding when the key is inserted into the key switch.
  • the first coding 9 is embodied as multilevel coding.
  • FIG. 3 Essentially the electronics of the key switch are shown in FIG. 3 essentially the passive components of the key switch shown.
  • the key switch has a front panel 11 which has an opening 14 for the introduction of the key 7.
  • the key is passed through the opening 14, which is represented by an arrow 12.
  • the key switch on a non-electrically conductive and non-magnetizable separator 13 which is disposed at the opening and the key from the first exciter spatially completely separate.
  • the partition member 13 is formed in the embodiment as a cuboid hollow body whose cavity is open only upwards in the direction of the opening 14.
  • the partition 13 forms a blind hole through which no dirt entering through the opening 14 continues to the electronics, which in FIG. 2 is shown, the key switch can penetrate.
  • the separating element 14 preferably separates the opening 14 airtight from the excitation device 6.
  • the separating element 13 is arranged guided through the horseshoe-shaped yoke 3.
  • FIG. 4 is a key 7 with a first coding 9, which is designed as multilevel coding, shown in detail.
  • a multilevel coding has a plurality of stages which are evaluated when they are exceeded by the evaluation unit 10. In the context of the embodiment, these are the four stages reset, clock, data and ready, which a certain amount of in FIG. 4 correspond to peg-shaped design of the first coding 9.
  • the evaluation unit 10 in this case has an excitation unit 16 which generates the alternating voltage U r .
  • an alternating current I is produced by the planar coil 4.
  • the first excitation device 6 has an inductance L of several milihenri, which changes when carrying out the first coding 9 by the magnetic field B (The changing inductance L is in FIG. 5 symbolically represented by a black rectangle with an oblique arrow).
  • the alternating current I which is measured by the excitation unit 16, changes accordingly.
  • the first coding 9 is thus sampled inductively by means of the alternating magnetic field B.
  • the excitation unit 16 generates on the output side in accordance with the changing current I and thus according to the changing inductance L a correspondingly changing output voltage U (L).
  • the output voltage U (L) is compared via comparators 17, 18, 19 and 20 with different voltages U1, U2, U3 and U4. If the voltage U (L) exceeds the voltage U1, the signal ready is set to logic "1", the voltage U (L) exceeds the voltage U2, the signal data is set to logic "1", the voltage U exceeds L) the voltage U3, the signal clock is set to logic "1" and exceeds the voltage U (L), the voltage U4, the signal reset is set to logic "1".
  • the reset signal clears the flip-flops 25-29, which form a shift register.
  • the first tooth b0 of the key 7 via the signal data to set the flip-flop 34.
  • the tooth back edge leads to a falling edge of the signal clock, resulting in the transfer of the data bit from flip-flop 34 in the flip-flop 25 of the shift register and to clear the flip-flop 34 leads.
  • the next tooth b1 of the key does not lead to the setting of the flip-flop 34, so that at the next tooth trailing edge a zero is taken over into the flip-flop 25 of the shift register, at the same time b0 in the shift register from flip-flop 25 to flip-flop Flop 26 pushed further.
  • the rising edge of the ready signal will cause the code checker 31 to clear. If all the bits read in are in the shift register have the correct value, the output Z of the code verifier 31 is set to logical "1" and thus the validity of the key is reported.
  • FIG. 6 an embodiment of the invention is shown, which allows a parallel reading of the first coding. Unlike the in FIG. 2 shown serial readout of the first coding, in which only a single excitation means 6 is required, several first excitation means are required in parallel readout.
  • the key switch has in FIG. 6 the three first excitation means 6a, 6b and 6c with the respectively associated planar coils 4a, 4b and 4c and the respectively associated yokes 3a, 3b and 3c.
  • the operation with respect to each first initiator is identical to the in FIG. 2 illustrated and described first excitation means 6, the evaluation unit 10 evaluates the analog of the height of the currents I 1 and I 2 and I 3 , which in detail in FIG. 7 is described.
  • FIG. 6 the evaluation unit 10 evaluates the analog of the height of the currents I 1 and I 2 and I 3 , which in detail in FIG. 7 is described.
  • a first coding 9 is attached, wherein the first coding is formed as a binary coding.
  • the first coding 9 has either an electrically conductive and / or magnetizable region at the positions at which the first excitation devices later scan the key, or no such region is provided at the relevant point, which is shown in FIG FIG. 6 shown in dashed lines.
  • An attached area corresponds, for example, to a logical "1"
  • a non-attached area corresponds, for example, to a logical "0" or vice versa.
  • the evaluation unit 10 belonging to the parallel readout is shown.
  • the first excitation device 6a has the inductance L 1
  • the first excitation device 6b has the inductance L 2
  • the first excitation device 6c has the inductance L 3 .
  • the inductances L 1 , L 2 and L 3 then change again according to the first coding 9 of the key 7.
  • the excitation unit 16 generates the alternating voltages U r1 , U r2 and U r3 , so that, corresponding to the changing inductances L 1 , L 2 and L 3 change the alternating currents I 1 , I 2 and I 3 , which is evaluated in the excitation unit 16.
  • the excitation unit 16 then generates, according to the changing inductances L 1, L 2 and L 3 to the inductances L 1, L 2 and L respectively associated three voltages U 1 (L 1), U 2 (L 2) and U 3 (L 3 ), which are supplied to a comparator 24 as an input.
  • the comparator 24 then compares the three voltages U 1 (L 1 ), U 2 (L 2 ) and U 3 (L 3 ) with an internal reference voltage, for example, when the reference voltage is exceeded, a logical "1" or alternatively a logical "0 " is produced.
  • Each of the three voltages U 1 (L 1 ), U 2 (L 2 ) and U 3 (L 3 ) is thus compared with the internal reference voltage and generates the binary output signals b0, b1 and b2 in parallel. These are fed to a comparator 25 as input, which compares them with the binary numbers c0, c1 and c2, which represent the access code within the scope of the exemplary embodiment. If they match, an access signal Z is set to logic "1" by the comparator 25 on the output side, and thus the key is recognized as suitable.
  • the access signal Z can subsequently be used, for example, to control a relay or, for example, be read directly from an operating device and / or a controller and / or a control device.
  • FIG. 8 shows a further embodiment of the invention is shown, in which two codes are read in series simultaneously.
  • first coding 9 and a second coding 9 'on both sides attached to the key On the carrier element 8 of the key 7 is a first coding 9 and a second coding 9 'on both sides attached to the key.
  • the first coding 9 is designed to detect the instantaneous position of the key in the key switch during the insertion of the key as a location track, while the second coding 9 'is in the form of any curve. From the operation corresponds to the embodiment according to FIG. 8 the embodiment according to FIG. 2 However, in contrast to the embodiment according to FIG. 2 a second excitation means 6 'with a second planar coil 4' and a second yoke 3 'is present.
  • the first coding 9 and the second coding 9 ' are read out at the same time, it being recognized by means of the first coding 9 during insertion of the key into the key switch at which position the key is currently located and thus the second coding 9' can be correspondingly evaluated ,
  • the first coding 9 contains the information of the bit number, while the second coding 9 'contains the associated bit value.
  • FIG. 9 is the according to the embodiment according to FIG. 8 associated evaluation unit 10 shown schematically.
  • the first excitation device 6 has the inductance L that changes when the key is inserted, while the second excitation device 6 'has the variable inductance L' when the key is inserted.
  • the excitation unit 16 generates the two voltages U r and U r ', whereby the two alternating currents I and I' are produced by the respectively associated planar coil 4 and 4 '.
  • the excitation unit 16 On the output side, the excitation unit 16 generates by evaluating the inductances L and L 'changed upon insertion of the key in accordance with FIG alternating currents I and I 'changed, the voltages U (L) and U (L') ', the voltage U (L) representing the first coding 9, while the output voltage U (L') 'representing the second coding 9' , The two voltages U (L) and U (L ')' are evaluated by a decoder 32, which reads in the voltages U (L) and U (L ')' and links the two voltages together, the first coding Number (location information) while the second encoding provides the bit number associated with the bit value.
  • the decoder 32 can thus extract the bit number from the first coding 9, while it can extract the associated bit value from the second coding 9 '.
  • the decoder 32 outputs the corresponding bits b0, b1 and b2 thus determined, which are then compared by means of the comparator 25 with the access code c0, c1 and c2, which are in the form of individual bits, for example. If they match, the access signal Z is set to logic "1" by the comparator 25.
  • the first coding 9 and the second coding 9 ' are preferably evaluated in a quantized manner, ie if, for example, the second coding 9' exceeds a certain height at a position, a logic "1" is recognized and if a certain height is undershot, a value is selected logical "0" or vice versa detected.
  • FIG. 10 a further embodiment of the key 7 is shown, in which on the support member 8, a first coding 9 is attached in the form of a bar code.
  • An evaluation of the barcode can be done eg by means of in FIG. 2 and FIG. 5
  • the output voltage of the excitation unit 16 output voltage U (L) is evaluated by a downstream bar decoder that decodes the bar code, and then compared the thus decoded bar code by means of a comparator with the access code becomes. If they match, then the access signal Z at the output of the comparator is again set to logic "1".
  • FIG. 11 schematically shows an advantageous embodiment of the key is shown, which can be applied to all of the previously described possible key in all the codings described.
  • the coding is covered with an opaque layer 33, so that the coding from the outside is no longer visually recognizable. As a result, a replica of the key is difficult. Otherwise, the key corresponds to FIG. 11 the keys described above. The same elements are therefore provided with the same reference numerals as in the preceding figures.
  • key switch By key switch according to the invention can be realized a high degree of protection against contamination. Furthermore, the sampling of the coding is wear-free, which allows a long life of the key switch and the key. Furthermore, the key switch requires only little space. Since the key switch reads out the coding exclusively via an alternating magnetic field, it has a high immunity to electromagnetic interference, which is e.g. from radio transmission systems. Furthermore, the security against manipulation is very high.
  • the key switch can be easily parameterized to different keys, for example by software. Furthermore, the key function can be combined with an electromechanical switching function.
  • the key switch can have, for example, a plurality of code checkers 31 and / or comparators 25 connected in parallel, for example, each check a different access code and output a respective access signal.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
  • Lock And Its Accessories (AREA)
EP08008284A 2008-04-30 2008-04-30 Interrupteur à clé Expired - Fee Related EP2113887B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP08008284A EP2113887B1 (fr) 2008-04-30 2008-04-30 Interrupteur à clé
JP2009104035A JP5111428B2 (ja) 2008-04-30 2009-04-22 キースイッチ
US12/432,317 US20090273437A1 (en) 2008-04-30 2009-04-29 Key-operated switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08008284A EP2113887B1 (fr) 2008-04-30 2008-04-30 Interrupteur à clé

Publications (2)

Publication Number Publication Date
EP2113887A1 true EP2113887A1 (fr) 2009-11-04
EP2113887B1 EP2113887B1 (fr) 2013-01-02

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Family Applications (1)

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EP08008284A Expired - Fee Related EP2113887B1 (fr) 2008-04-30 2008-04-30 Interrupteur à clé

Country Status (3)

Country Link
US (1) US20090273437A1 (fr)
EP (1) EP2113887B1 (fr)
JP (1) JP5111428B2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106869600A (zh) * 2017-03-17 2017-06-20 辽宁石油化工大学 一种新型可调节通用密码钥匙与锁芯
CN107646063A (zh) * 2015-03-23 2018-01-30 多玛凯拔奥地利有限公司 锁或窗或门配件

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JP2012072600A (ja) * 2010-09-29 2012-04-12 Nihon Kaiheiki Industry Co Ltd キースイッチ
DE102012216396B4 (de) * 2012-09-14 2015-03-26 Siemens Aktiengesellschaft Ermitteln einer IT-Berechtigungsinformation unter Verwendung eines mechanischen Schlüssels
US9984840B2 (en) 2015-12-18 2018-05-29 Darfon Electronics (Suzhou) Co., Ltd. Keyswitch structure, switch structure and method of assembling a keyswitch structure

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US5376932A (en) * 1988-08-24 1994-12-27 Samokine; Georges System for exchanging information between a portable object such as a key and an exchange device
GB2273128A (en) * 1991-01-08 1994-06-08 Chubb Lips Nederland Bv Keys
EP0514772A1 (fr) * 1991-05-22 1992-11-25 Kabushiki Kaisha TEC Clé
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Cited By (4)

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Publication number Priority date Publication date Assignee Title
CN107646063A (zh) * 2015-03-23 2018-01-30 多玛凯拔奥地利有限公司 锁或窗或门配件
CN107646063B (zh) * 2015-03-23 2019-11-19 多玛凯拔瑞士股份公司 锁或窗或门配件
CN106869600A (zh) * 2017-03-17 2017-06-20 辽宁石油化工大学 一种新型可调节通用密码钥匙与锁芯
CN106869600B (zh) * 2017-03-17 2022-08-09 辽宁石油化工大学 一种可调节通用密码钥匙与锁芯

Also Published As

Publication number Publication date
JP5111428B2 (ja) 2013-01-09
EP2113887B1 (fr) 2013-01-02
US20090273437A1 (en) 2009-11-05
JP2009270430A (ja) 2009-11-19

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