DE2912258A1 - FURNISHING AT LOCKS AND THE LIKE TO PREVENT UNAUTHORIZED ACCESS - Google Patents

Description

DIpI. Ing. P «t« r Ott · ₇₀₃₃ Herrenberg (Kuppingen)

Patent attorney 4 Eifeistraße 7

Telephone (0 70 32) 319 99

1403 / ot / wi

February 14, 1979

Company BSG-Schalttechnik GmbH & Co KG, Wilhelmstrasse 8, 7460 Baiingen 1

Equipment on locks and the like to prevent unauthorized access

State of the art

The invention is based on a device on locks according to the preamble of the main claim. It is known to protect rooms to be protected, buildings, objects, especially cars, which are secured by locked doors, through ever more complicated lock devices at these against unauthorized access or unauthorized actions, including the removal of the object or cars · come In the main, consider the usual cylinder locks, in which, due to correspondingly different designs,

03-0041 / 0202

2312258

1403 / ot / wi
February 14, 1979

processing of tumblers, for example, up to 5000 lock combinations set so that one could be convinced that unauthorized action is not possible. However, practice proves the opposite every day, even if to further protect systems, objects and also here again in particular cars separately to the area lock-key nor alarm systems are provided which it in a wide variety of forms. These include For example, alarm systems based on the principle of disturbing an ultrasonic field.

One of the main reasons for the possibility of copying the key, even with very complicated lock systems To provide access, for example, is that every lock, including every cylinder lock, necessarily due to its nature the information code of the mechanical Guard locking, which allows it to be opened on its own, also has in stock in a mechanical ready position, so that you can scan the tumblers of a cylinder lock, for example, by inserting a malleable element and then uses this information to obtain a corresponding key duplicate immediately or later, so that one can apparently take possession of the object or the car or locked facilities without difficulty and can enter rooms.

In the German patent application P 27 52 106.8, to which this Registration represents an addition, is a device on locks, safety devices, switching elements and the like.

to prevent unauthorized access to rooms, buildings, cars etc. and / or unauthorized removal and / or, if applicable simultaneous arming and disarming of alarm systems, with an authorized measure enabling

03-0041 / 0202

February 14, 1979 - / 3 - ^{LQ IU} ^

Control and / or release element (key) and a counter element (lock) that responds to this described, in which the trigger element contains at least one code track on a non-mechanical basis and a sensor in the counter element is arranged, which scans the code track by non-physical action and a corresponding output signal supplies a logic combination circuit comprising a memory (PROM) for carrying out a comparison and output of a control command. With this facility not described above the only applicable lock combination that allows opening is no longer mechanically physically present and is usually not stored in the immediate vicinity of the lock, so that unauthorized action are practically impossible without the use of force. It also enables the German patent application P 27 52 106.8 described device a several orders of magnitude higher number of possible lock combinations, so that an empirical determination of the correct combination is automatically excluded.

At this point, it is expressly pointed out that the scope of this application is limited by one Repetition of the content of the earlier application P 27 52 106.8, to which this invention expressly represents an addition, is disregarded; It goes without saying, however, that in the sense of a cross-reference the entire content of the description of the older Application is also to be regarded as disclosed in this application.

The same applies to the entire description of the German patent application P 28 43 359.2, which relates to an opto-electrical device on locks and the like. and an addition to the main application P 27 52 106.8

03-0 <H1 / Q202

February 14, 1979 - 4r -

represents, to which the present invention forms an addition. Indeed, the present invention is able, in particular, to include the subject matter in the German patent application to be designated as a sister application P 28 43 359.2 to improve decisively and to develop further, whereby in this first additional application P 28 43 359.2 an optoelectrically ^ device on locks is described, which relates in particular to the. logical Evaluation of data information relating to key elements or trigger elements and the ones used for this purpose logic circuits. An essential aspect of this sister application P 20 43 359.2 is the fact that real codings in any encrypted form, for example binary coded, on two or more parallel tracks stored signal pulse sequences are detected and evaluated.

The evaluation in the sister application P 28 43 359.2 is preferably carried out by optoelectronic systems on the infrared light emission with the help of suitable light-emitting diodes, irradiation or illumination of the the material having the codes and detection of the light-dark field distribution with the help of suitable sensors. With these proposed optoelectronic devices and evaluation circuits, the use of light beams, even if in the invisible infrared range, it turns out to be too complicated for the evaluation, because pollution effects, low signal amplitudes and correspondingly cumbersome and high-quality discrimination as well as a certain dependence on the relative movement between information carriers and sensors require suitable compensation measures and high-quality and not always uncomplicated evaluation logic.

03-041 / 02-2

1403 / ot / wi 2312258

February 14, 1979 - jf - "'"

There is a need for measures that reduce the effort reduce the sampling and evaluation and make the sampling foolproof to this extent, in particular also a Complete detachment from the previous dependency on the relative speed between the trigger element and the sensor is strived for.

Advantages of the invention

The device according to the invention with the characterizing features of the main claim has the advantage that if the scanning of the coded signal information is maintained by non-physical influence, interference effects that for example due to dirt and the like, no longer occur; it is also required in the case of the present Invention in the field of scanning, i.e. the generation of signal information, no external supply sources whatsoever, because the coded information is formed as an electrical signal from the movement between the information carrier and the sensor, on the other hand, however, in an advantageous embodiment the invention completely independent of the actual speed of movement is.

Another particular advantage is the extraordinary size of the constant signal amplitude of the coded information which is established at practically every speed and which makes any pulse- shaping or discriminatory measures superfluous in the further evaluation circuit.

The measures listed in the subclaims allow advantageous developments and improvements of the device specified in the main claim. It is particularly advantageous that a suitable design in the scanning

030041/0202

February 14, 1979 - JS -

rich of the counter element (sensor) back movements, i.e. movements against the actual insertion direction of the trigger element or key in the counter element or the key opening not even to generate in this If yes, do not lead to the correct signal information, so that no logical discriminator circuits are required that excrete such unwanted signal information.

drawing

An embodiment of the invention is shown in the drawing and will be described in more detail in the following description explained. 1 shows a side view of a receiving opening in the sensor area of the counter-element, into which a schematic indication of a key or release element is introduced; In Fig. 1, this introduced key is shown in plan view for better understanding. Fig. 1a shows the possible arrangement of scanning coils and excitation or drive magnets in the sensor area, if with several Coding tracks on the release element are worked on, the figures 2a to 2c show the magnetic carrier of signal information in its magnetic behavior, a code track on the trigger element can be formed by a plurality of such small magnetic carriers, and FIG. 3 shows a diagram the course of the change in the magnetic field or the change in the magnetic field on the signal-generating rod external drive magnetic field and that through the envelope of the Magjtetfsides generated electrical impulses in the Sensor coils.

For the sake of better understanding, the arrangement of the magnets and wire rods is shown in the figures as follows: "It is understood that magnets and rods" are to be arranged in such a way that the effects that can be achieved by the effects of the magnetic fields are achieved.

G 3-0041 / 02Ö5

1403 / ot / wi 2312258

February 14, 1979 - γ -

/ IO

Description of the exemplary embodiments

The basic idea of the invention is the non-physical Interaction between the sensor scanning the signal information encoded in the release element and the sensor To generate signal information generating areas on the trigger element by a magnetic interaction, in Modification and further development of the opto-electrical action, as described in German patent application P 2G 43 359.2 is. Such a magnetic interaction, as will be explained in detail below, is unnecessary To a certain extent, circuit elements and logical circuit sequences are contained in this additional sister application mentioned P 28 43 359.2; but it should be pointed out that the evaluation electronics in their essentials Principles as described in this application can also be used for the present invention, so that the present invention in so far also an improvement and is an addition to the application P 28 43 359.2.

In the simplest case, the trigger element, which in the following is only a key element in each of its multiple embodiments is referred to via inclusions permanent magnets or other discrete material particles that generate a permanent magnetic field and induce corresponding voltage jumps in them as they slide past one or more sensor coils.

The main reproach of the present invention relates, in a particularly advantageous embodiment, to the utilization of the so-called and the "Wiegand effect" which is known per se and which is therefore first briefly explained below. This Wiegand effect is based on the knowledge that especially

3Ό041 / 0202

1403 / ot / wi 2912250

February 14, 1979 -Jf-

traded and hardened magnetic wires made of a homogeneous alloy over a shell and hard in the magnetic sense have a soft core in the magnetic sense, i.e. a certain outer wire area is hard magnetic, an inner wire area forms a soft magnetic material part. As a result, one is required to change the The direction of magnetization of the shell part must apply a much larger external magnetic field than this for the inner core is required.

The illustration of FIGS. 2a to 2c show what is meant; in Fig. 2a is the "Wiegand ^ magnet wire - it understands that other geometrical forms of "Wiegand" magnetic particles can also be found are conceivable - magnetically saturated, i.e. both the shell area 2a and the core 2b of the magnetic Element or magnet wire 2, as it is only to be referred to in the following, are in the same Direction magnetized. This is also shown by the thick arrows 3 for the shell area and the thin arrows 4 for the Core areas that run in the same direction. Accordingly, there is then also a comparatively large one external magnetic field 5, which noticeably exceeds the geometrical dimensions of the magnet wire 2.

You put now to a thus saturated magnet wire a comparatively small magnetic field in the opposite direction to - ran for example, the magnetic field effects in the representation of Figure 2a in a positive direction, then the magnetic field for the FIG 2b shown reversal is negative -.., Then the soft magnetic core of the magnet wire 2 is magnetized the other way around with reference to the preferred magnetic direction of the shell material, as the arrows 4 for the core area, now running in the opposite direction, show. The consequence of this is that the magnetic external

030041/0202

February 14, 1979 - / - * °

tion of the magnet wire 2 of FIG. 2b to the outside is practically zero; there is no noticeable magnetic field which apart from the end sides, beyond the dimensions of the magnet wire 2. From this magnetic field distribution the Position of Fig. 2b can now be the magnet wire 2 according to FIG. 2c by applying a positive outer Magnetic field switch back to the original state of Fig. 2a, i.e. in Fig. 2c the orientation run the arrows indicating the nuclear magnetic field again in the original direction according to FIG. 2a. The transition from FIG. 2b to FIG. 2c there is an extremely fast switchover of the magnetic field with the corresponding structure also represents the external magnetic field 5 · and it is preferably this Rapid switching process, which causes a very strong magnetic field to jump out, which is used to generate signals can be. In other words, bring you into the area a magnetic wire 2 in the state of FIG. 2b has a positive magnetic field and in the local and temporal connection with this process an electrical sensor coil, then by the reversal of the magnetic field From Fig. 2b in Fig. 2c in the coil an electrical pulse is generated which has a surprising strength can and depending on the type of coil, for example 0.5 to 12 volts can be.

In relation to the overall system and possible noise in it, the pulse generated only once with clear and distinct conciseness has an extremely high signal-to-noise ratio when the magnetic field changes, whereby this pulse can be generated in any combination of polarity and direction . It is particularly important that no external electrical supply potential is required to generate the impulse, only bringing it up to it

030041/0202

February 14, 1979 - yb ~

of the magnetic wire 2, when it is in the state of FIG. 2b, into the region of a positive magnetic field causes a one-time and only one-time reversal of the magnetic field and the impulse induction.

In the illustration of FIG. 3, the course of the acting magnetic field is shown as curve I; the pulses generated in each case in the sensor coil with II. It can be seen that when the magnetic field I increases in the positive direction at a certain strength of this magnetic field, approximately at time t ₁ , the sharp needle pulse II occurs, which results from the

, ', formed magnetic field

Turning the of the magnetic wire / from the state of the Flg. 2b results in the state of FIG. 2c. The maximum the applied positive magnetic field strength can be between 100 and 150 örstedt? one for switching back the magnetic field strength of the magnet wire 2 in the state of Fig. 2b is sufficient negative external field strength about 20 örstedt.

It is of particular importance that by embedding The "Wiegand effect" exhibiting hanging wire lengths 7a, 7b, 7c.

7i or, if further code tracks are provided, from magnet wire

liuig-ii 8a, 3b, 8c ... Si in a key element any coding of YES-MEIN-FELDERN for each code track of the S chi ils se Ie! can be met again = the type of coding can be so, as described in detail in German patent application P 28 43 359.2. Is now a key element soleiies 9 with the code tracks 7 8 ".. 1 10 lufnahmeöffnung dis In a counter-element 11 is inserted, then first, the magnetic orientation of the einselns n-i-lagnetdrahtabschnittchen 7a, 7b. . "Sa, 3b ... meaningless, = because a first drive magnet 12 switches before magnetic field lengths 7a, 7b. .. 8a, 8b ... on one

30041/0292

µ- 2312258

At

predetermined state of the external magnetic field emitted by this to, namely preferably to the state of FIG. 2b. Some of the magnetic wire lengths are already in the State of FIG. 2b in the receiving opening 10, then this no longer matters and they remain in this state, otherwise they are switched over. Immediately in The area of a second drive magnet 13 is now at least one sensing coil or sensor coil 14 for the at least a code track arranged on the key element 9 is provided. The second drive magnet 13 now generates one Magnetic field that it is necessary to turn over the magnet wire 2 in the state of FIG. 2c from the state of FIG. 2b accordingly the "Wiegand-Effect" comes and this suddenlya An increase in the magnetic field induces the aforementioned in the coil 14 Needle pulse II high precision and extremely high signal-to-noise ratio.

It can be seen that the induction of such a needle pulse II is completely independent of the insertion speed, because the changeover from the state of FIG. 2b to the state of FIG. 2c occurs when a certain influencing factor occurs external magnetic field, not dependent on any Speed. If one of the magnetic field lengths 7a, 7b ... 8a, 8b ..., for example, approaches the magnetic field length. 7c the drive magnet 13, then nothing happens as long as the external magnetic force acting on the magnetic field strength, at which the "Wiegand wire" tips over, has not yet been reached. At some point, however, this magnetic field strength will be achieved when the magnet wire length 7c slides past the drive magnet 13, with every possible relative speed from almost zero to extremely high is possible. At that moment it changes from the respective, to the key element 9 embedded magnet wire length emitted outer magnet

030Ö41 / 02Q2

February 14, 1979 -YZ- * * ^IUVy

field abruptly, with the speed of this change obviously does not depend on the insertion speed and therefore also does not depend on the size of the generated electrical pulse in the coil 14 depends on one of these variables, but only a function of the dimensioning of the respective magnet wire element in the key element 9 and the number of turns from which the sensor coil consists and that basically with a correspondingly thin wire cross-section can be made as high as you want.

It can be seen that even a partial retraction of the key element 9 with the embedded magnetic wires 7a, 7b ... 8a, 8b is irrelevant , because the passing of the drive magnet 13 now no longer causes an individual change in the magnetic field of the magnetic wires, unless they are up to pulled out to the first conditioning magnet 12. This, however, causes a new reading. The generation of the electrical needle impulses induced in the at least one coil 14 to be assigned to the individual codes is therefore completely independent of the respective speed, of trembling movements, of retraction movements or the like, the reading being made clear and distinct.

The evaluation of the electrical pulses generated in this way in the sensor coils 14 can then be carried out with any sockets, preferably with the logic circuits as described in German patent application P 28 43 359.2 and to which this registration is also an addition. It is also of considerable importance that the actual Evaluation circuits not in the lock area, not even in the door area, but in practically any remote area Place, can also be arranged in the basement or the like of a house and are thus protected from any unauthorized access,

030041/0202

1403 / ot / wi 2912250

February 14, 1979 -> <3 - <, - «- ■ -

because the generated impulses have such strong amplitudes, that they can be reliably discriminated and evaluated at any time, even over long connecting lines.

It goes without saying that, in principle, modifications are possible using the Wiegand effect; so they can from the conditioning magnet 12 and the drive magnet 13 generated magnetic field strengths also be the same, with then in each case when turning over the thus influenced magnetic wire lengths result in evaluable pulses in the readout element. Indeed Even when switching from state 2a to state 2b of magnet wire 2 there is an evaluable pulse, which is indicated running in the negative direction in FIG. 3 and denoted by III.

Since every additional code track on the key elements 9 significantly increases the number of possible codings, any number of code tracks can be used as desired, be placed on the key element. The scanning can then take place as shown in FIG. 1a; it's a conditioning magnet 12 'and a drive magnet 13' present, which are arranged for all, locally close to the drive magnet 13 ' Sensor modules 14a, 14b, 14c, 14d are effective.

The pulses induced in the sensor coils 14, 14a, 14b ... are practically independent of temperature and of consistently high quality, with multiple evaluations being a result of the Encounter information carrier and sensor occurring event are impossible, because the magnetic field of a magnetic rod particle 7a, 7b ... 8a, 8b can only change once under the action of a drive magnet of a given polarity.

It is understood that it is possible to be the key element

030041/0202

February 14, 1979 - 1 / -

in a given mechanical design, for example with a specially designed beard, to maintain Doors, locks and the like can be opened mechanically, but with the electrical scanning of the code track area this opening process only then enables and / or releases additional bolts and locks and / or additionally Existing alarm systems are disarmed or, if the key element is not properly activated, armed and triggered brings.

To the magnetic field formations by the magnetic wires, the are stored in the key material, not to be destroyed, it is recommended that the material of the key element is not magnetic or optionally also consists of a suitable plastic.

030041/0202

-Afc-

Blank page

Claims (7)

Claims j, - Equipment on locks, safety devices, switching elements and the like to prevent unauthorized access to rooms, buildings, cars etc. and / or unauthorized removal and / or, if necessary, simultaneous arming and disarming of alarm systems, with a control enabling an authorized measure and / or trigger element (key) on which there is at least one code track, and a counter element that scans the coded information of the trigger element by non-physical action, in particular according to patent application P 27 52 106.8 and P 28 43 359.2, characterized in that the at least one code track (7, 8) is formed from a predetermined distribution of magnetic field lines on the triggering element (9) and that a sensor (14) in the area of the counter-element comprises at least one electrical coil in which the magnetic field line distribution follows one another and on an insertion or separation movement between the trigger element and d em counter-element matched electrical voltage pulses can be induced. 2. Device according to claim 1, characterized in that 030041/0202 1403 / ot / wi Feb. 14, 1979 - 2 - to generate the magnetic field line distribution magnet wire lengths (2; 7a, 7b ... 8a, 8b) provided and on Trigger element (9) are arranged, each of which has a hard magnetic shell area and a soft magnetic shell area Core have such that they are affected by the action of two, possibly different, external magnetic fields opposite polarity can be switched into two magnetic field states (Wiegand effect). 3. Device according to claim 1 or 2, characterized in that in the region of the insertion opening for the key element (9) receiving counter element (lock 11) at least one first conditioning magnet (12) is provided which all arranged in or on the key element (9), through this distribution in common assignment at least each a code track (7, 8) forming magnet wire lengths (7a, 7b ... 8a, 8b ...) in a predetermined magnetic state switches and that a further drive magnet (13) is provided, which switches back all magnet wire particles (7a, 7b ... 8a, 8b ...) in an initial magnet state. A device according to claim 3, characterized in that adjacent to at least one of the magnets (12, 13) at least a sensor coil (14; 14a, 14b, 14c, 14d) is arranged is, in which by the change in magnetic state of the magnet wire lengths arranged in the key element (9) a needle pulse can be induced in each case. 5. Device according to one of claims 1 to 4, characterized that the key element comprises a longitudinal part with mechanical beard training for additional mechanical release and unlocking of a lock 030041/0202 1403 / ot / wi February 14, 1979 - 3 - when actuated. 6. Device according to one of claims 1 to 5, characterized in that that the magnet wire lengths (7a, 7b ... 3a, 8b) embedded in the key element (9) and with at least a top layer are so coated that their distribution is not recognizable. 7. Device according to one of claims 1 to 6, characterized in that that the material of the key element (9) is not magnetic. 030041/0202