EP2622153B1 - Sensor device having rotational direction detection - Google Patents

Description

The invention relates to a knob cylinder with a sensor device for rotary knobs of electronic or electromechanical knob cylinders.

Electronics or elements of rotary knobs of knob cylinders are known to be used to control an actuator accommodated in an associated profile cylinder of a wing lock when actuated, to connect a lock bit of the profile cylinder to the rotary knob in a rotationally effective manner. After the actuation has ended, the actuator is switched off. The actuation typically takes place in a contactless manner, for example by means of a code card, for example in the form of a transponder card, which is placed on a reader of the rotary knob or is approached to it and contains authorization data. This data is read out by the reader and checked for authorization to open the respective leaf. If the test is successful, the actuator is activated or energized and the sash can be unlocked and opened using the rotary knob.

Now the problem arises of being able to recognize when the door is unlocked or (again) locked in order to be able to deactivate the activation of the rotary knob or the actuation of the actuator if necessary.

Rotary knobs offer very little space, so that incremental encoders can hardly be used to save space. In addition, slotted disks have the disadvantage that they can become dirty, which can impair operational safety. Last but not least, a relatively complex data evaluation is necessary in order to determine the direction of rotation of the slotted disc.

The object of the invention is to at least reduce the disadvantages of the prior art.

This object is achieved by the subject matter of claim 1. Advantageous further developments of the invention are specified in the subclaims.

A knob cylinder according to the invention comprises a sensor device. The sensor device according to the invention is designed to be inserted with one part into a rotary knob of a knob cylinder. It has at least a pair of sensors and a counter element. This counter element and the at least one pair of sensors are arranged such that they can be moved relative to one another along a substantially circular movement path, for example via a transmission. I.e. the counter element or the respective pair of sensors can be arranged in a stationary manner, while the respective pair of sensors or the counter element is accordingly moved along the circular movement path, that is to say along a respective circular line. The counter element and the sensors are opposite one another in such a way that the detection areas of the sensors each enclose a partial area of the movement path and partially overlap one another in the area of the movement path. I.e. each sensor detects a specific area of the movement path, the two areas thus sharing a partial area. The movement path runs partially outside the detection areas of the at least one pair of sensors. I.e. the detection areas of both sensors do not cover the entire movement path. As a result, the counter-element "moves" one after the other through the detection areas of the at least one pair of sensors. As an example, the counter-element first comes into the partial detection area of only one sensor, then into the overlapping area of both sensors, then into the detection partial area now the other sensor, and then into an area that is not detected by any of the sensors. This makes it possible to determine in which direction the movement is taking place. In addition, a back and forth movement can be detected, and that with simple, space-consuming means. Due to the formation of several sensor detection areas, the counter-element does not have to have any filigree structures such as a slotted disc for the sensor to function.

The sensors are preferably formed by means of GMR sensors. I.e. the counter element is magnetized or, for example, electrically magnetized. This offers the possibility of simply being able to use the electrical resistance of the sensors as a measured variable. In addition, the relative movement of the counter element to the sensors causes relatively large changes in the electrical resistance of the sensors, which enables a simple evaluation circuit.

The sensor device according to the invention preferably also has such an evaluation circuit. The evaluation circuit is set up to detect, on the basis of sensor signals that are output by the at least one pair of sensors, that the counter-element is moving past each sensor. This makes it possible to determine in which detection sub-area the counter-element is located or whether it is located outside the detection areas.

The evaluation circuit preferably detects the movement past by XORing the sensor signals with one another. I.e. the evaluation circuit always detects when a detection sub-area is "entered" or left by the further counter-element. This is a particularly simple and inexpensive solution.

The passing is preferably detected in that the evaluation circuit delays a signal formed by means of the XOR linkage of the sensor signals by a predetermined value as a delay signal and XOR links the signal formed with the delay signal. This means that an entire output signal can be generated that only contains level change pulses instead of longer phases with a changed level. This has the advantage that any downstream control of the knob cylinder is activated for significantly shorter times, namely only during the short pulses, which has an energy-saving effect.

A rotary knob according to the invention is arranged to be freely rotatable with respect to a lock bit of a profile cylinder. It can also be operated to energize an actuator, which then connects the rotary knob with the lock bit in a rotationally effective manner, so that the rotary knob moves the lock bit with it when it is turned. The rotary knob has a reader which is set up to read data from an access data carrier such as a code card. Finally, the rotary knob also has a part of one of the sensor devices described above. I.e. apart from the sensor device, the rotary knob remains almost untouched. The actuator can be, for example, a motor or a lifting magnet which is coupled to a coupling mechanism which, when the actuator is energized, is actuated in such a way that the aforementioned rotational connection is established.

The reader is preferably connected in an active mode so that it is able to read data from an access data carrier. In an inactive state, however, the reader is switched off so that it is no longer able to read data from an access data carrier, such as a code card, a person with biometric data or memorized access codes (mental features) as access data. In inactive mode, the reader consumes little or no energy. The sensor device comprises according to the invention the aforementioned evaluation circuit. This is set up to trigger a connection of the reading device when the evaluation circuit has detected the counter-element moving past one of the sensors. I.e. the sensor device can fulfill two tasks, on the one hand the detection of the direction of movement and on the other hand simply only the detection of the rotary movement at all, and that without complex logic.

For this purpose, the evaluation circuit preferably comprises an XOR (exclusive OR) element to which the sensor signals are input and whose output signal is input to the reader or to a controller that controls the reader. I.e. conventional, inexpensive standard components can be used, which is inexpensive.

The evaluation circuit preferably also has a time delay element to which the output signal of the aforementioned, an XOR element is input. It also has another XOR element, to which the output signal of one XOR element and an output signal formed by the delay element are input. The output signal of this other XOR element is in turn input to the reader or the controller.

The aforementioned counter-element or the at least one pair of sensors is preferably arranged in a stationary manner, that is to say is preferably not moved with respect to the entire rotary knob. In the simplest case, the counter element or this pair of sensors is attached to the profile cylinder or integrated into it. Accordingly, this pair of sensors or the counter-element is arranged to be moved along the path of movement by the rotary knob when the rotary knob is turned. This pair of sensors or the counter element attached to the rotary knob or integrated into it. I.e. the sensor can be easily integrated to save space.

Figur 1

einen Knaufzylinder gemäß einer Ausführungsform der Erfindung in zwei Ansichten,

Figur 2

Verläufe von Sensorsignalen,

Figur 3

eine Erweiterung des Knaufzylinders von Figur 1 und

Figur 4

eine Erweiterung zu Figur 3.

Further features and advantages of the invention emerge from the following description of preferred embodiments. Show it:

Figure 1

a knob cylinder according to an embodiment of the invention in two views,

Figure 2

Courses of sensor signals,

Figure 3

an extension of the knob cylinder from Figure 1 and

Figure 4

an extension to it Figure 3 .

Figure 1 shows a knob cylinder 100 as part of a lockable wing lock in two views, namely only the parts relevant to the invention.

According to Figure 1a the knob cylinder 100 comprises a profile cylinder 110 with a freely rotatable lock bit 111 and a faceplate hole 112. A rotary knob 120 is attached to one end of the profile cylinder 110. This is provided with a reader 121, which is coupled to an antenna 122 for contactless contact with an access data carrier (not shown). Furthermore, a preferably optical display 124 is embodied, for example, in the form of an illuminated ring. Finally, a self-sufficient energy supply in the form of a battery 123 or an accumulator is accommodated in the rotary knob 120.

As in Figure 1b As shown, the rotary knob 120 has four sensors 125, preferably in the form of GMR sensors, on its side facing the profile cylinder 110. The sensors 125 are arranged in such a way that the detection areas 126 of the individual sensors 125, represented with the aid of the hatched areas, partially overlap one another in pairs, indicated by the cross-hatched areas.

Corresponding to this, the profile cylinder 110 has on its side facing the rotary knob 120 elements that can be detected by the sensors 125, here in the form of two magnets 113.

If the rotary knob 120 is rotated, the sensors 125 follow a respective, advantageously the same, circular path, the center of which is the axis of rotation of the rotary knob. This leads to the detection areas 126 of the individual sensors 125 being alternately moved past one of the magnets 113. This makes it possible for the respective sensor 125 to detect when the respective magnet 113 enters the associated detection area 126 or leaves it. Based on this, each sensor 125 outputs a corresponding signal.

The signals preferably from all sensors 125, but at least from sensors 125 belonging to a pair, that is to say two sensors with partially overlapping detection areas 126, are transmitted to a data processing logic, for example a processor.

The sensor signals are or are preferably digitized.

For example, a sensor signal S1 is assigned to the left sensor 125 for the upper pair of sensors 125, while a sensor signal S2 is assigned to the right sensor 125.

In Figure 2 various curves are given for the sensor signals S1, S2.

If the magnet 113 is outside the detection areas 126 of both sensors 125, both take signals S1, S2, as in FIG Figure 2a shown, a low level. If the magnet 113 enters the detection area 126, for example the sensor 125 at the top left in Figure 1b , the associated signal (here: S1) goes high. The other signal remains low. If the rotary knob 120 is turned further, the magnet 113 reaches the overlap area of the two detection areas 126, and the second signal (here: S2) also assumes the high level. When turning the rotary knob 120 further, the magnet 113 at some point leaves the overlap area and remains in the detection area 126 of the other of the two sensors, that is to say the sensor 125 at the top right in Figure 1b . If he also leaves this detection area 126, both signals S1, S2 assume the low level again. In Figure 2a three consecutive rotations of the rotary knob 120 are shown. The duration of the high and low level phases depends on the speed of rotation of the rotary knob 120.

If the rotary knob 120 is turned in the opposite direction, a signal curve results as in FIG Figure 2b shown. This is made clear by the fact that signal S2 now assumes the high level and leaves it again earlier than signal S1.

Figure 2c shows the case when the rotary knob 120 is not continuously rotated in one direction. Instead, the rotary knob 120 is turned back again shortly after leaving the detection area 126 of the sensor 125 associated with the signal S1, so that it enters the detection area 126 of this sensor 125 again without having previously entered the detection area 126 of the sensor 125 associated with the signal S2. And this is clearly reflected in the resulting signal curves.

According to Figure 2d the rotary knob 120 is turned back again before leaving the detection area 126 of the other sensor 125, since two high-level phases of the signal S2 overlap with one and the same high-level phase of the sensor signal S1. And this is clearly reflected in the resulting signal curves.

With the arrangement according to the invention, not only the direction of rotation but also the change in direction of rotation can be detected without the need for complex processing logic.

If the rotary knob 120 is activated, that is, it is rotationally connected to the cam 111, the clear signal curves can be used to easily determine whether the rotary knob 120 is turned in the direction of unlocking or locking the wing lock, not shown, and thus the connected wing should be unlocked or locked. The number of turns of the rotary knob can also be used as a basis. For example, if the check of the access data was successful, it can be provided that a user must turn the rotary knob twice in the unlocking direction before the rotary knob releases the active rotational connection again.

Figure 3 shows an extension of the knob cylinder 100.

According to Figure 3a the sensor signals S1, S2 are input to an XOR element or gate 101. Its output signal A is input to a controller 102 here. The controller 102 functions, for example, in such a way that, when the signal A assumes the high level and the rotary knob 120 is not activated, it activates the reader 121 either immediately or after a predetermined number of high level phases in the output signal A have been exceeded, i.e. switches on or on. I.e. a person who wants to open a door, for example, can activate the reader 121 by simply turning the rotary knob 120. When the reader 121 is activated, the display 124 is preferably activated such that it lights up yellow, for example, in order to indicate readiness for reading.

Figure 3b shows the curves of the output signal A in relation to the in Figure 2 shown curves of the sensor signals S1, S2.

With this arrangement, the controller 102 can recognize when the magnet 113 "enters" or leaves a respective detection (partial) area 126.

Figure 4 shows an extension to the in Figure 3a shown arrangement. Here, a delay element 103, formed here by means of a dead time element, and a second XOR element 101 are connected in series between the XOR element 101 and the controller 102. In addition to the output signal A of the first XOR element 101 itself, the second XOR element 101 receives a signal V which corresponds to the output signal A, except that its course is shifted by a predetermined time period Δt by means of the delay element 103. The following applies for time t: V (t) = A (t - Δt).

The output signal S of the second XOR element 101 resulting therefrom is now input as a signal S to the controller 102. The delayed signal V connected to the second XOR element 101 serves the purpose of converting a signal A with relatively long high-level phases into a signal S with relatively short high-level phases. I.e. signals with very short high level pulses can be input to the controller 102.

The time duration Δt is determined in such a way that the downstream controller 102 can continue to reliably detect each pulse with the minimum pulse width.

Figure 4b shows the course of the signals S1, S2, A, V, S for the course of the signals S1, S2 according to FIG Figure 2a . The time delay Δt between the signals A, V can also be clearly seen here.

The invention is not restricted to the embodiments described above.

For example, it can be provided to display the state of the sensor signals S1, S2. For this purpose, the display 124 has, for example, a multicolored lighting device, for example in the form of an RGB LED. This does not light up when the signals S1, S2 are both low. If S1 changes its state to high, the LED lights up red. If the other signal S2 also goes high, the LED lights up blue. If the signal S1 loses the high level (again), the LED lights up green.

As an alternative or in addition to an optical display, an acoustic display can also be provided, from which a special acoustic signal can be output for each state of the sensor signals S1, S2.

• Schlafmodus: nur die Sensoren 125 sind aktiv
• Berechtigungs- oder Lesemodus: der Leser 121 ist zugeschaltet; die Sensoren 125 sind möglicherweise inaktiv
• Aktivmodus: der Drehknauf 120 ist aktiviert; der Leser 124 ist möglicherweise wieder weggeschaltet

The knob cylinder 100 or its rotary knob 120 advantageously includes three operating states:

• Sleep mode: only sensors 125 are active
• Authorization or read mode: the reader 121 is connected; sensors 125 may be inactive
• Active mode: the rotary knob 120 is activated; the reader 124 may be switched off again

In the sleep mode, only one sensor 125 can be activated in order to activate the reader 121.

The sensors 125 can also be activated in the active mode in order, for example, to be able to carry out evaluations of the frequency of visits and the like when the rotary knob 120 is permanently activated.

If the rotary knob 120 is activated, it is preferably provided that the sensors 125 are left activated. This makes it possible to correspondingly lengthen the activation time of the rotary knob 120 by turning the rotary knob 120. Furthermore, it can be provided that the sash is unlocked when it has been detected that the rotary knob 120 has completed a certain number of revolutions (for example: 2).

Furthermore, it can be provided that the rotary knob 120 and preferably also the sensors 125 are switched off for a predetermined time.

The number of pairs of sensors 125 is not limited. For example, three sensors 125 can be arranged whose detection areas 126 partially overlap one another in pairs. Overall, the three detection areas 126 can even cover the entire movement path, just not the detection areas 126 that overlap in pairs.

The number of magnets 113 is not limited either.

The respective magnet 113 can be designed as a permanent magnet or as an electromagnet.

The sensors 125 can also be optical, haptic, sound-based or other types. The magnet 113 is realized by a counterpart belonging to the sensor 125 for sensor actuation.

The sensors 125 and magnets 113 can be interchanged with one another.

The sensors 125 can additionally or alternatively serve to wake up or activate the reader 20. I.e. the user must first turn the rotary knob 120 before an access data carrier can even be read out.

Special operating modes such as emergency opening can also be implemented in that the rotary knob 120 has to be turned in a certain way, for example, which can be easily recognized with the sensor device according to the invention.

As a result, the invention offers an extremely simply structured and space-saving solution for detecting rotary motion, preferably of the rotary knob 120 of a knob cylinder 100.

List of reference symbols

100

Knob cylinder

101

XOR element

102

control

103

Delay element

110

Profile cylinder

111

Lock bit

112

Forend hole

113

magnetic part

120

Knob

121

reader

122

antenna

123

power supply

124

display

125

sensor

126

Detection area

A.

Output signal

S.

Control signal

S1, S2

Sensor signal

V

Delay signal

Δt

Time Delay

Claims (9)

1. A knob cylinder (100), comprising a rotary knob (120) and a profile cylinder (110), wherein the rotary knob (120) is disposed freely rotatably with regard to a locking bit (111) of the profile cylinder, and
   the rotary knob (120) is formed to energize an actuator, which thereupon rotationally-operatively connects the rotary knob (120) to the locking bit (111), such that, during rotation, the rotary knob (120) moves along the locking bit (111),
   wherein the rotary knob (120)
   includes a reader (121), wherein the reader (121) is adapted to read data of an access data carrier,
   wherein the knob cylinder comprises a sensor device, wherein the sensor device with one part is inserted into the rotary knob (120) of the knob cylinder (100), characterized in that

   • the sensor device includes

   - at least one pair of sensors (125), and

   - a counter-element (113),

   • wherein the counter-element (113) and the at least one pair of sensors (125)

   - are disposed to be movable in relation to each other along an essentially circular displacement path, and

   - are located opposite each other in such a way that detection areas (126) of the sensors (125)

   - respectively include a partial area of the displacement path, and

   - partially overlap each other in the area of the displacement path,

   • wherein the displacement path is partially located outside the detection areas (126) of the at least one pair of sensors (125).
2. The knob cylinder (100) according to claim 1, wherein

   • the sensors (125) are formed by means of GMR sensors (125), and

   • the counter-element (113) is magnetized.
3. The knob cylinder (100) according to claim 1 or 2, furthermore including an evaluation circuit (101; 101, 103, 101) adapted, based on sensor signals (S1, S2), which have been output by at least one pair of sensors (125), to detect the counter-element (113) moving past each sensor (S1, S2).
4. The knob cylinder (100) according to claim 3, wherein the evaluation circuit (101; 101, 103, 101) detects the passing movement in that it XOR concatenates the sensor signals (S1, S2).
5. The knob cylinder (100) according to claim 4, wherein the evaluation circuit (101, 103, 101) detects the passing movement in that it

   • delays a signal (A) formed by means of the XOR concatenation of the sensor signals (S1, S2) by a pre-determined value (Δt) as a delay signal (V), and

   • XOR concatenates the formed signal (A) with the delay signal (V).
6. The knob cylinder (100) according to any of the claims 3 to 5, wherein

   • the reader (121)

   - in an active mode, is switched in such as to be able to read the data of an access data carrier, and

   - in an inactive condition, is switched off such as not to be able to read the data of an access data carrier,

   • and
   the evaluation circuit (101; 101, 103, 101) is adapted to trigger switching-in the reader (121),
   if the evaluation circuit (101; 101, 103, 101) has detected a counter element (113) moving past one of the sensors (125).
7. The knob cylinder (100) according to any of the claims 3 to 6, wherein the evaluation circuit (101) comprises an XOR element (101), to which the sensor signals (S1, S2) are input, and the output signal (A) thereof is input to the reader (121) or to a control (102) activating the reader (121).
8. The knob cylinder (100) according to claim 7, wherein the evaluation circuit (101, 103, 101) furthermore

   • includes a time delay element (103) to which the output signal (A) of the one XOR element (101) is input, and

   • includes another XOR element (101),

   - to which the output signal (A) of the one XOR element (101) and an output signal (V) formed by the delay element (103) are input, and

   - the output signal (S) thereof is input to the reader (121), respectively to the control (102).
9. The knob cylinder (100) according to any of the claims 1 to 8, wherein

   • the counter-element (113) or the at least one pair of sensors (125) is disposed stationarily, and

   • when rotating the rotary knob (120), the at least one pair of sensors (125), respectively the counter-element (113) is disposed to be moved along the displacement path by the rotary knob (120).

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