WO2001083928A1

WO2001083928A1 - Automatic door allowing access by an animal

Info

Publication number: WO2001083928A1
Application number: PCT/EP2001/005013
Authority: WO
Inventors: Detlef Palesch
Original assignee: Sab Service Und Fertigung Von Automatischen Türanlagen Und Bauelementen Gmbh & Co. Kg
Priority date: 2000-05-03
Filing date: 2001-05-03
Publication date: 2001-11-08
Also published as: DE10065966A1; WO2001083927A1

Abstract

The invention relates to an automatic door allowing access by an animal (10) having a given identity, wherein the door is located between an inner area (70) and an outer area (80). Said door comprises a device (100) indicating the identity of and carried by the animal, which is assigned to said animal (10); a first detection device (40) for detecting the presence of the identity-indicating device (100) within a first defined area (110) relative to the door (20); a second detection device for detecting the presence of the identity-indicating device within a second defined area and an actuation device for opening the door (20) so as to allow access by the animal (10). The first defined area (110) is located either in the inner area (70) or the outer area (80) and the second area is located in the other area respectively. The actuation device has different adjustable operating states, wherein in a first operating state, the actuation device responds to the presence of the identity-indicating device (100) within the first and second defined areas (110). In a second operating state, the actuation device does not respond at all and only responds to the presence of the identity-indicating device (100) within the first defined area (110) in a third operating state. In a fourth operating state, the actuation device only responds to the presence of the identity-indicating device (100) within the second defined area in order to open the door (20).

Description

Automatic gate to let an animal through

description

The present invention relates to the field of animal husbandry, in particular animal husbandry of free-range animals, and in particular the invention relates to gates for the passage of animals from one area to another, such as e.g. B. a cat from a living area to the outside and vice versa.

When keeping free-range animals, e.g. Cats, the problem arises that the animals must be given a possibility, especially in winter, so that they can get out from an inside area and vice versa. In cats in particular, the frequency with which they lie between an interior area, such as e.g. B. an apartment, and a garden back and forth, very high, so that the effort for the cat owner to open a door or window to let the cat in and out is very high. As a result, either a person must always be present to open a door or window, or, for example, a cellar window or the like is left open to allow the animal, e.g. a cat that can switch between an interior and an exterior at any time and at will. The disadvantage in the latter case is that the corresponding interior cools down and it is possible that an undesired stranger enters the interior.

If a shed or the like is available, it is possible for the pet owner to provide it with an opening, e.g. B. a circular opening in the wooden door of a wooden shed. Although these openings are sized openings so that the animal in question, but not a human, such as. B. a thief in can penetrate the interior, the provision of these permanent openings is disadvantageous in that the interior in question cools down greatly in winter.

Therefore, openings with pivotable flaps are known in the prior art. In these openings, for example, a hinge that is in both directions, i.e. H. is pivoted inwards and outwards, is attached between an upper end of the opening and a flap, so that in a normal state the flap hangs downward due to the weight and covers the opening, but is nevertheless pivotable in both directions, so that the the animal in question can press the flap with his head, for example, to get in or out. Although these flap openings avoid the cooling problem associated with a permanent opening, and although these openings are small enough to prevent thieves from entering the interior, these flap devices do not prevent other living things, e.g. B. mice, rats and the like, can penetrate into the interior. In the case of cats, for example, it is possible that not only the in-house cat will pass through the opening, but also that other cats, e.g. the neighbour's cats who use opening to enter the interior, such as B. the basement.

It is also a disadvantage of the flap openings that the resistance to opening the flap in both directions must be low enough to allow the pet to open the flap without problems. This makes it impossible to use seals which thermally isolate the gap between the flap and the opening in the closed state of the flap and seal against moisture, since the associated frictional forces would be too great.

DE4124143A1 describes a slip-through flap for cats, which consists of a slip-through hole or an opening 2, a flap leaf 4, a motor 6 and a sensor 8 exists, wherein the loop hole 2 is opened in response to the sensor 8 recognizing an object attached or implanted to the cat within a defined radius.

DE3702465A1 describes a milking / feeding system for free-range cows carrying identification means. According to this system, identification means are attached to the cows located in a barn, which are detected by suitably arranged identification devices in order to allow or prevent the cows inside the barn from entering or leaving feeding stalls 4, drinking troughs 5 or milking rooms 10. In particular, the unidirectional gates 12 within the barn are assigned identification devices in order to permit the controlled directional passage of only certain cows and to prevent that of other cows, e.g. those who have already received their allotted amount of feed at an earlier point in time, or from whose last time of milk withdrawal a predetermined period of time has passed.

The object of the present invention is to provide an automatic gate for the passage of an animal which is more user-friendly.

This object is achieved by a gate according to claim 1.

According to an embodiment of the present invention, the gate is arranged in the outer wall of a house between a living area and a garden and is specifically intended for the house cat of this apartment. In this exemplary embodiment, the gate is designed as a sliding door, with a transmitting / receiving device being provided above the sliding door. The domestic cat wears a collar on which a passive transponder is attached, which is excited by an excitation signal from the transmitting / receiving device in order to transmit a coded signal, e.g. B. to send out a digitally modulated electromagnetic wave. The encoded Signal has a maximum range up to which the coded signal is detected by the detection device. The maximum range defines a defined area or a release area around the sliding door in which the cat must be located so that the detection device detects the presence of the cat in the vicinity of the sliding door. According to the invention, it is believed that the presence of the cat near the sliding door corresponds to the cat's desire to pass through the gate. In a first operating state, the sliding door is therefore opened by a drive device as soon as the presence of the cat in the defined area has been detected.

According to a further exemplary embodiment, a plurality of operating states can be set. In a second operating state, the sliding door remains closed, for example, even if the presence of the cat in the defined area has been detected, so that the cat cannot get through the gate. The owner of the house cat can select this operating state to prevent the cat from getting outside.

In a further exemplary embodiment, two transmitting / receiving devices are used in order to provide two corresponding trigger areas, one of which is located on the side of the interior and the other on the outside of the gate. Consequently, in this embodiment, the presence of the cat or the passive transponder carried is monitored in either a first or a second defined area or an inner or an outer area in front of or behind the sliding door, so that it is possible to target the cat either only to let it pass through the sliding door from inside to outside or from outside to inside. In a first operating state, the transmitting / receiving device is switched off both inside and outside, so that the cat cannot pass through the sliding door in either direction. In a second operating state, the sliding door becomes independent of whether the signal of the passive transponder is detected in the inner or the outer defined area. In a third and fourth operating state, the sliding door is only opened upon detection of the signal of the passive transponder in one of the two areas, so that the cat can either go from the inside to the outside or from the outside to the inside.

According to a further exemplary embodiment, the sliding door is designed as a double-leaf sliding door with a standard size of either 500 x 350 mm, 800 x 500 mm or 1,000 x 700 mm, only one of two leaves being movable, and the drive device being attached such that the same can be removed again.

An advantage of the present invention is that, by using the automatic gate according to the invention, it is on the one hand possible for the animal keeper to give the animal the opportunity to pass through the gate whenever he wants and regardless of whether the animal keeper is present or not, and on the other hand it is possible to prevent unwanted animals such as. B. mice, rats, or to the animal in question of the same type, but foreign animals, can penetrate into the interior.

Another advantage of the present invention is that by using an actuator to open the door, it is possible to thermally insulate the door in the closed state and to seal it against moisture, since the frictional resistance created by such seals when the door is opened Tors does not have to be overcome by the animal itself, but is overcome by the actuating device.

Preferred exemplary embodiments of the present invention are explained in more detail below with reference to the accompanying drawings. Show it: 1 shows a situation in which a cat intends to pass through an automatic gate according to the present invention;

Figure 2 is a vertical side elevation section through a sliding door used in an automatic gate according to an embodiment of the present invention. and

Fig. 3 shows a cross section of the sliding door of Fig. 2 in a plan view.

Referring first to FIG. 1, a situation is shown in which a cat 10 wants to pass through an automatic gate in accordance with the present invention.

In the exemplary embodiment shown in FIG. 1, the automatic gate has a sliding door 20 which is arranged in an outer wall 30 and a transmitting / receiving device 40 which is attached to the wall 30 above the sliding door 20. The sliding door 20 is shown in FIG. 1 in an open state, in which a wing 50 of the sliding door 20 does not extend into an opening 60 defined by the sliding door 20. In the opened state, it is consequently possible for the cat 10 to walk through the opening 60 in order to get from an inner region 70 into an outer region 80. In the exemplary embodiment shown in FIG. 1, the wall 30 is an outer wall that separates a living area 70 from a garden 80, the transmitting / receiving device 40 being attached to the side of the wall 30 facing the inner area 70.

As shown in FIG. 1, the cat 10 has a collar 90 to which a passive transponder 100 is attached as an identity-indicating device. The passive transponder 100 is characterized by an excitation signal that is emitted by the de / receiving device 40 is permanently transmitted, excitable to send out a signal that is uniquely assigned to the cat 10, which carries this passive transponder 100 with it, by means of a special code. The signal which is emitted by the passive transponder 100 has a maximum range up to which the signal strength of the signal at the location of the transceiver 40 is sufficient for the transceiver 40 to receive the signal and thereby the Presence of the transponder 100 or the cat, 10 in the vicinity of the sliding door 20 can be detected. As a result of this range, a defined area around the opening 60 is defined in the inner area 70, which is indicated in FIG. 1 by a dashed line 110 and for which applies that if the transponder 100 is located therein, the signal strength of the Signal at the location of the transceiver 40 is sufficiently high.

The mode of operation of the exemplary embodiment shown in FIG. 1 will now be described. As previously mentioned, the cat 10 is in a living area 70. In accordance with the present invention, it is believed that when the cat 10 is near the sliding door 20, the cat 10 intends to exit through the opening 60 into the garden 80 reach. In order to avoid that the cat 10 often passes close to the sliding door 20 without wanting to get into the garden 80 through the opening 60, it is preferred that the sliding door 20 is located at a location along the wall 30 which is from the Otherwise cat 10 (ie if cat 10 does not want to get into garden 80) is rarely used.

If the cat 10 now wants to get into the garden 80, the distance between the cat 10 and the transmitting / receiving device 40 decreases as the cat 10 approaches the sliding door 20. The transmitting / receiving device 40 transmits as already mentioned, an excitation signal coming from an internal circuit (not shown) of the passive Coupled transponders 100 and excited the same to send a signal that is clearly assigned to the cat 10. As the distance between the transmitting / receiving device 40 and the cat 10 decreases, the signal strength of the transmitted signal at the location of the transmitting / receiving device 40 increases. As soon as the signal strength exceeds a certain threshold value or a minimum signal strength, or as soon as the transponder 100 penetrates the defined area 110, the transmitting / receiving device 40 detects the presence of the transponder 100 in the defined area 110. If the signal has the code assigned to the cat 10, the transmitting / receiving device 40 releases the opening the sliding door 20. For example, the transceiver 40 can signal a drive device (not shown) to pull the wing 50 of the sliding door 20 to the side to allow passage through the opening 60. After the sliding door 20 has been opened, the cat 10 will go through the opening 60 into the garden 80, the sliding door 20 then closing again. In the exemplary embodiment shown, the door is closed again, for example, after a predetermined period of time has passed, the drive device (not shown) moving the leaf 50 into the opening 60 in order to close the same.

It is desirable not to choose the defined area 110 too large or the threshold value for the signal strength not too small in order to prevent the defined area or the triggering area 110 from being too large, and to prevent the cat 10 from defining the defined area 110 also frequently enters without wanting to get into the garden 80 through the opening 60.

It should be noted that, although in the previous embodiment of FIG. 1 the transponder 100 is a passive transponder, any device that can determine the identity of the transponder can be used instead Cat 10 allows. Such a device further comprises, for example, an active transponder, in which case the transmitting / receiving device could be replaced by a receiving device, since the active transponder would actively send out the signal of the code clearly assigned to the cat, for example using a battery, without having to be excited by an excitation signal. An identity indicating device could also be any device for emitting an electromagnetic wave or a sound or sound, such as e.g. B. a light emitting diode, an infrared transmitter, an ultrasonic transmitter or the like. In this case, the emitted signal would not have to be coded, but would, for example, only have a specific frequency spectrum that is uniquely assigned to the cat. In this case too, the transmitting / receiving device would be replaced by a corresponding receiver, ie a receiver for electromagnetic radiation or a microphone. It would also be possible to use, as the identity indicating device, a bar code or pattern such as that provided on the surface of the collar 90, for example, to enable the identity of the cat 10 to be determined. In this case, the transmitting / receiving device would be replaced by a bar code laser or a similar optical system that can recognize the code and, upon detection of this code, can trigger the opening of the sliding door 20. In this case, the defined area 110 is defined by the field of view that the optical system or the bar code laser has.

It is further pointed out that in the case of a transponder or a device for emitting electromagnetic radiation or sound as an identity-indicating device, it is also possible to implant this identity-indicating device under the skin of the cat and not on a collar to install. In animals other than a cat, a foot strap could also be used as a carrier for the transponder. What is essential is lent that the identity-indicating device is constantly carried by the cat and can not be stripped.

Further, although it has been described above that the defined area 110 is determined by the range of the identity indicating device, it is possible to separately use a receiving device for receiving the signal and a device for detecting the presence of the cat in the defined area. For example, in addition to the transmitting / receiving device shown in FIG. 1, a heat sensor could be attached which detects the presence of any living being when the same is in the defined area. The opening of the sliding door would then be triggered if both the signal with the special code and the presence of a living being were detected.

With regard to the threshold value for the signal strength, it is preferred that this threshold value can be set by the cat holder in order to enable the cat holder to suitably set the defined area or the release area with respect to the extent around the sliding door.

It is pointed out that, contrary to the preceding description, that the signal of the cat is uniquely assigned, it is also possible to use a signal which is not uniquely assigned to the cat, but which nevertheless enables the door to be assigned only one low probability of being opened to other animals or other events. According to the invention, the signal must at least be able to prevent animals from passing through the gate without an identity-indicating device. In the case of an infrared transmitter or an ultrasound transmitter as an identity-indicating device, the frequency spectrum of the same preferably does not overlap with the frequency spectrum of surrounding electrical devices, such as, for. B. a lamp or a stereo, not overlaps to avoid opening the gate in response to other events, such as turning on the interior lights.

It should also be noted that the specific arrangement as shown in Fig. 1 is not essential to the invention. Although it has been described above that the inner area 70 is a living area and that the outer area 80 is a garden, it is possible to use the invention wherever two areas are separated by a wall. Although it is preferable to arrange the defined area or the trigger area directly around the sliding door, for example by arranging the transmitting / receiving device directly above the sliding door, as shown in FIG. 1, it is also possible to use another meaningful defined area to select and to arrange the transmitting / receiving device in a different place. The transmitting / receiving device can, for example, be attached above a basement door while the sliding door is located on an outer basement wall, so that when a cat runs from a living room into the basement room, the opening of the sliding door is already triggered when the cat goes through the Basement door is running.

It is further pointed out that, although it has been described above that the sliding door 20 opens in any case in response to the detection of the presence of the transponder within the defined range, different response behavior of the automatic gate according to the invention can also be provided. According to one exemplary embodiment, the automatic door according to the invention has two operating states or two different response behaviors and a defined area, such as, for example, that shown in FIG. 1. In the first operating state, the door is opened as described above in any case if the transponder of the cat is within the triggering area. In a second operating state, the door remains independent of where it is the cat is closed, which may be desired by a cat owner, for example, if the cat is leaving the apartment for a weekend and the cat is not supposed to leave the apartment during this time.

According to a second embodiment, the automatic gate according to the invention has four operating states and two defined areas or trigger areas, i.e. one inside and one outside. For example, it could be that the second trigger area is mirrored to the trigger area shown in FIG. 1. In a first operating state, the automatic gate is switched off, so that the sliding door never opens. In a second operating state, the sliding door opens as soon as the transponder or the cat is in one of the two release areas, so that the cat can get from the inside to the outside and from the outside to the inside. In a third operating state, the sliding door is opened if the cat is in the release area inside the interior, but not opened if the cat is in the release area inside the outside area. As a result, in the case of the third operating state, the cat can pass through the sliding door from the inside to the outside but not from the outside to the inside. In a fourth operating state, conversely, the sliding door is only opened if the cat enters the release area inside the outside area, but not opened if the cat enters the release area inside the inside area. In this case, the cat can get through the sliding door from the outside in but not from the inside out.

The operating states described above could, for example, be set using a rotary switch or by a plurality of buttons, which are accommodated in a box together with the transceiver and internal logic. It is also possible to implement timing to allow that the cat owner can, for example, program a daily routine with regard to the operating states.

It should be noted that it is also possible to close the sliding door in a manner other than that described above. In the case of two trigger areas, i.e. one in the inside area and one in the outside area, it could be provided, for example, to open the sliding door upon detection of the presence of the cat in the one release area and to close the sliding door as soon as the cat leaves the second release area.

Reference is now made to Figs. 2 and 3 which show various views of a sliding door which can be used in the present invention. Fig. 2 shows a side elevation section of the sliding door, Fig. 3 shows a partial sectional view of the same. The sectional view of FIG. 3 is indicated by B in FIG. 2, the sectional view of FIG. 2 being indicated by C in FIG. 3.

The sliding door from Flg. 2 and 3 is a double-leaf sliding door that is built into an outer wall, for example, in order to separate an inner region 200 from an outer region 210. The sliding door is formed as a unit and has a frame with an upper frame element 220a, a lower frame element 220b and two side frame elements 220c (only one side frame element is shown in FIG. 3). A canopy 230 is attached to the upper frame element 220a by means of a screw 240. A skirting board 250 is attached to the lower frame element 220b and, when the sliding door is installed in a wall, runs along the floor in the outer region 210. The frame with the elements 220a-220c has T-shaped protrusions 260a-2601 on its outer surface in order to enable better engagement between a wall and the frame. In the frame, two rail support elements 290 and 300 are attached to the upper and lower frame elements 220a and 220b by means of screws 270 and 280. Two parallel rails 310a, 310b, 320a and 320b are attached to the rail support elements 290 and 300, respectively. A movable wing 330 extends between the upper rail 310a and the lower rail 320a and is guided by the rails 310a and 320a so as to be laterally movable. A second wing .340 extends between the rails 310b and 320b, which is normally also guided by the rails 310b and 320b in order to be laterally movable, but this wing 340 is locked in this exemplary embodiment.

As can be seen, the wings 330 and 340 consist of a first side wall 350 and 360 and a second side wall 370 and 380, respectively, which are opposed in parallel. It can also be seen that the space between the side walls 350-380 is divided into several sections. In particular, in each case an inner section 390 and 400 is defined by a closed space which changes through the side walls 360, 380 and intermediate connecting walls 410 and 420 or the side walls 350 and 370 and intermediate connecting changes 430 and 440 (and two further ones, not shown) Walls) is limited.

The inner sections 390 and 400 are surrounded by lateral sections. First lateral restriction sections 450 and 460 are provided to be laterally attached to wings 330 and 340 and to enable sliders 470a, 470b and 480 to be secured to wings 330 and 340 via lateral restriction sections 450 and 460, respectively are connected. The slider 470a is guided through the lower rail 320a, the slider 470b being guided through the upper rail 310a. Both sliders 470a and 470b are connected to the movable wing 330 via the lateral limiting section 450 and are also connected via a suitable facility such. B. a belt connected to a drive device (not shown).

As soon as, as mentioned above, a suitable event is detected, such as. B. that the cat is in a release area, the drive device (not shown) is actuated to move the sliders 470a and 470b via a belt (not shown) to thereby laterally shift the movable wing as indicated by an arrow 490 is displayed.

Although, as described above, the side restriction portion 460 is connected to the sliders 480 (only one is shown in FIGS. 2 and 3), in the present embodiment the sliders 480 are locked so that the wing 340 is fixed.

Furthermore, the inner section 400 and 390 of the two vanes 330 and 340 on the side opposite the delimiting section 450 and 460 is delimited by an open delimiting section 500 (the open delimiting section of the wing 340 cannot be seen in FIG. 3). The open boundary portion 500 is bounded laterally by the side walls 370 and 350 and with respect to the inner portion 400 by the interconnection wall 440. As can be seen in FIG. 3, the open delimiting section 500 has a slot 510, into which, in a closed state, a sealing lip 520 projects, which extends between the lower rail support element 300 and the upper rail support element 290 along the side frame element 220c. As can be seen, the open restriction portion 500 has seals 530a and 530b on the side walls 370 and 350 which, when the wing 330 is in a closed condition, are between the sealing lip 520 and the side walls 350 and 370 to provide thermal insulation and moisture protection. The inner sections 390 and 400 of the two wings 330 and 340 are delimited at the top and bottom by an upper and lower open delimiting section 540 and 550, respectively. The upper open restriction section 540 (only the upper restriction section of the wing 340 is shown, but the same section is also in the other wing 330) is delimited by the side walls 360 and 380 and the intermediate connection wall 410 and has a slot opposite the intermediate connection wall 410 560 into which the rail 310b protrudes. Upper open restriction portion 540 has seals 570a and 570b attached to side walls 360 and 380, which are located between rail 310b and side walls 360 and 380 to provide thermal insulation and moisture protection. Corresponding to the upper open boundary section 540, the lower open boundary section 550 is delimited by the side walls 360 and 380 and the intermediate connecting wall 420 and has a slot 580 opposite the intermediate connecting wall 420, into which the lower rail 320b projects. The lower open restriction portion 550 also has seals 590a and 590b attached to the side walls 360 and 380, which are located between the side walls 380 and 360 and the lower rail 320b to provide thermal insulation and moisture protection.

In order to also provide thermal insulation and moisture protection between the two wings 330 and 340, there is a seal 600 in the center of the frame, which runs parallel to and exactly between the side frame elements 220c.

It should be noted that although the sliding door described with reference to Figs. 2 and 3 is a two-wing sliding door, it is also possible to use a sliding door with only one wing. With regard to the size and dimensions of the sliding door unit shown in FIGS. 2 and 3, the standard sizes are 500 x 350 mm, 800 x 500 mm and 1,000 x 700 mm preferred when using the sliding door for cats. It is further preferred that the drive device (not shown) is mounted so that it can be easily removed.

It should be noted that although a sliding door for use in the automatic gate of the present invention has been described in detail above with reference to Figs. 2 and 3, it is also possible to use other means for closing an opening, such as e.g. B. a hinged door, a window or the like. With these different configurations of the closure device, additional measures known in the prior art can be taken to prevent the animal from being injured during a closing or opening operation. With the sliding door, for example, a maximum force of the drive device could be set in such a way that an animal which is located between the sealing lip and the closing wing is not crushed.

Finally, it is further pointed out that the invention is not only applicable to cats, as described above, but that the present invention is also applicable to other animal species and other animal husbandries, such as, for example, livestock husbandry. For example, the present invention can be applied to a dog breeder who provides each of his dogs with a transponder with a different code. For example, each dog could have its own enclosure, each of which is connected to an outdoor enclosure. The breeder can provide each enclosure with an automatic gate in accordance with the present invention, so that each dog can switch between its enclosure and the free-range enclosure at will, but conversely a dog cannot enter a foreign enclosure because the code the its transponder does not match the code required to open the corresponding automatic gate. The present invention is therefore able to enable a gate to be opened automatically as soon as a particular animal is in a triggering area, but the gate remains closed to any other (unwanted) animal.

Claims

claims

1. Automatic gate for passage of an animal (10) with a specific identity, the gate being located between an inner region (70) and an outer region (80)

an identity indicating device (100) carried by the animal and associated with the animal (10);

a first detection device (40) for detecting the presence of the identity indicating device

(100) within a first defined range

(110) relative to the gate (20);

a second detection device for detecting the presence of the identity-indicating device within a second defined area; and

an actuator for opening the gate (20) to let the animal (10) through,

wherein the first defined area (110) lies in either the inner area (70) or the outer area (80) and the second area lies in the respective other area, and

wherein the actuating device has different adjustable operating states, wherein in a first operating state the actuating device detects the presence of the identity-indicating device (100) within the first and the second defined area (110), not at all in a second operating state, only in a third operating state Presence of the identity-indicating device (100) within the first defined area (110), and in a fourth operating state only on the presence of the identity-indicating device responds to the device (100) within the second defined range to open the gate (20).

2. Automatic gate according to claim 1, wherein the identity-indicating device (100) comprises a transmitting device for transmitting a signal associated with the animal, and the detection device (40) comprises a receiving device for receiving the signal.

3. Automatic gate according to claim 2, wherein the signal is an electromagnetic wave or sound with a special frequency spectrum.

, Automatic gate according to claim 2 or 3, wherein the signal comprises a digital code.

5. Automatic gate according to claim 4, wherein the code is adjustable.

6. Automatic gate according to one of claims 2 to 5, wherein the transmitting device (100) comprises a light emitting diode, an infrared transmitter, an ultrasonic transmitter or an active transponder.

7. Automatic gate according to one of claims 2 to 5, further comprising:

an excitation device (40) for emitting an excitation signal,

wherein the transmitter (100) is a passive transponder which is excited by the excitation signal to transmit the signal.

8. Automatic gate according to one of claims 2 to 7, wherein the signal has a limited range, wherein the detection device (40) the presence of the identity indicating device (100) if the receiving device (40) receives the signal.

Automatic gate according to one of claims 2 to 7, in which the signal has a limited range, the detection device (40) detecting the presence of the identity-indicating device (100) if the signal at the location of the receiving device (40) has a minimal signal strength exceeds.

10. Automatic gate according to claim 9, wherein the minimum signal strength is adjustable.

11. The automatic gate according to claim 1, wherein the identity-indicating device (100) has a bar code, the detection device (40) having an optical system with a limited field of view for recognizing the bar code in the defined area.

12. Automatic gate according to one of claims 1 to 11, wherein the identity indicating device (100) is attached to a collar (90) or an ankle of the animal (10), or is implanted under the skin of the animal (10).

13. Automatic gate according to one of claims 1 to 12, wherein the animal (10) is a cat (10).

14. Automatic gate according to one of claims 1 to 13, wherein the door (20) is a sliding door (20), a swing door or a window.

15. Automatic gate according to one of claims 1 to 12, wherein the gate (20) is a sliding door, and the actuating device comprises a drive device for laterally displacing a wing (50) of the sliding door (20).

6. Automatic gate according to claim 15, wherein the drive means can be easily removed.