CH627296A5 - Optical monitoring device - Google Patents

Description

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PATENT CLAIMS and the focal length and image sections of the objective lens

1. Optical monitoring that can be rotated about at least one axis.

Chungseinrichtung with at least one, a lens aufwei- 14. Optical monitoring device according to claim 13,

send camera and at least one dummy lens and characterized in that the control device a pro-

a device for controlling camera and motion s programmable microprocessor.

functions, characterized in that the camera lens 15. Use of the device according to claim 14, for

(11) and the dummy dummy (21) movable relative to each other monitoring a room, characterized in that are attached to the monitoring device. a mirror is attached to at least one part of the room

2. Optical monitoring device according to claim 1, and the objective lens by means of the control device on the characterized in that the movements of Kameraob- 10 mirror alignable and on the suitable focal length and the jective (11) and dummy lens (21) mechanically coupled suitable image section for indirect Observation of the rough-are. is adjustable.

3. Optical monitoring device according to claim 1,

characterized in that the camera lens (11) in a

Plane, which through the axis of rotation of the monitoring device 15

device, and the dummy lens (21) in a substantially perpendicular plane through the axis of rotation of the

Monitoring device is pivotable. The invention relates to a rotation around at least one axis.

4. Optical monitoring device according to claim 3, bare optical monitoring device with at least one characterized in that at least in the movement 20 having a lens camera and at least one plane of the camera lens and in the movement plane of the dummy lens, and a device for controlling lens dummy each one further dummy lens (12, 22) camera and motion functions, and a use is pivotally attached. such a facility.

5. Optical monitoring device according to claim 3, known devices of this type, which are mainly characterized in that the camera (30) has been used in essentially 25 sales rooms of self-service shops - within a circle that can be pivoted about its center, pointing - as e.g. B. migen first element (10) shown in Swiss Patent 504 742 is attached and the objective lens - on a camera container fixed lenses or trappe (21) on a second such element (20) of some dummy lens. The arrangement of the lenses or the different radius is appropriate, the swivel dummies being made in such a way that for a potential axis of the two elements essentially perpendicular to one another thief could not see through which of the different others are arranged and the centers the sales room was just being observed.

Chen coincide and the elements could be in such a way, although only one camera was used,

Cladding (40) are arranged so that a deterrent effect can be achieved from the outside of the camera, which cannot be distinguished on the jective (11) and dummy lens (21). entire visible sales area; this all the more

6. Optical monitoring device according to claim 5, 35 more than it was no longer necessary to mount the monitoring device — characterized in that the device attached to the same element is hidden.

brought lens dummies (21, 22) or lens (11) and

Dummy lens (12) at an angular distance between 90 ° have various disadvantages. The fixed arrangement of the lens and 135 ° are attached to the element. and the dummy lens on the camera case increased

7. Optical monitoring device according to claim 5, 40 (as shown above), the deterrent effect, characterized in that the one of the pivoting circular but the scope of observation. If the device had fixed elements (10) mounted by means of a drive motor (31), there was only the possibility of driving with a Weitwin and the other element (20) using a mechanical lens, a large part of the space from a certain niche coupling device (13, 14) is to be roughly monitored with the driven angle of view or at most connected to a suitable ben element (10) in such a way that it essentially performs a certain, narrowly limited section of the same pivoting movements as the driven mes exactly to keep under control. Also by means of a rotatable element. Facilities of this type have not been

8. Optical monitoring device according to claim 5,. Attention effect achieved.

characterized in that the two elements (10, 20) are pivotally attached to the support device (2) for the potential thief to provide complete monitoring. To fake 50 of the entire room also had to

9. Optical monitoring device according to claim 8, tiv large number of dummy lenses on the camera container characterized in that a motor (6) are attached to the support part (2), which the closely observing thief - to turn the monitoring device about its axis - about a thief among the staff - on whom deception is seen. ^ was able to draw attention to it and, if necessary,

10. Optical monitoring device according to claim 9, 55 light, to find out through which lens the room is over-characterized in that the motor (6) was at least awake. This was made possible by the fixed arrangement of two speeds of rotation. Objectives or the dummies even easier.

11. Optical monitoring device according to claim 1, The present invention aims to overcome these drawbacks in that the objective (11) eliminates with a lens.

provided for variable focal lengths and image sections 60 This is achieved according to the invention in that this is. Camera lens and the dummy dummy relative to each other

12. Optical monitoring device according to claim 1, are movably mounted in the monitoring device, characterized in that the camera (30) is a television camera. described an embodiment of the invention. Show it:

13. Optical monitoring device according to claim 11, 65 Fig. 1 is a schematic representation of the device without being characterized in that the control device, the Dre-fairing;

hung the monitoring device, the pivoting of Fig. 2 is a sectional view through the pivoting plane of the

Camera lens (11) or the dummy lens (12,21,22) camera of the panel in two embodiments;

Fig. 3 is a side view of the device without cover, with part of the device broken away, and

Fig. 4 is a front view of the device without cladding.

The device comprises two circular elements 10, 20 which are pivotally mounted in a support part 2. The support part 2 is rotatably attached to a fastener 1, by means of which the device on a horizontal wall, for. B. can be attached to the ceiling of the room to be transferred. A motor 6 on the support part 2 ensures the rotary movement of the device via a transmission belt 7. The support part 2 has a horizontal base plate 3 and two vertical elements 4, 4 'emanating therefrom, on which, on the one hand, rollers, on which the ring 20 is mounted, on the other hand, a bracket 9, which carries a television camera 30, are attached. The bracket 9 and the ring 10 connected to it via a web 15 can be rotated about a pivot axis by means of a pivot drive 31. The lens 11 on the television camera 30 passes through the ring 10 to the outside. On the same ring 10, as can be seen particularly clearly from FIG. 3, an objective dummy 12 is attached at an angular distance of approximately 130 °. The outer shape of the dummy dummy 12 is modeled exactly on the lens 11, so that after a suitable formwork of the device, no difference between the two can be determined.

The ring 10 is connected to the ring 20 via two cable pulls 13, 14. For the sake of clarity, only one such cable pull 13 is shown in FIG. 1; however, it is easy to see that a second corresponding cable pull 14 is to be provided, since cables can only absorb tensile forces. The cable pulls can be secured on the rings in guide elements (not shown) against lateral displacement. If, as indicated in FIG. 1 by an arrow on the ring 10, the camera 30 is lowered with its front part, then the associated ring rotates counterclockwise.

As a result, the ring 20 is also rotated counterclockwise via the cable pull 13. The lens dummies 21, 22 attached to the ring 20, which do not differ externally in any way from the visible part of the lens 11, thereby perform a corresponding pivoting movement (cf. arrows in FIG. 4). Thus, if the camera 30 is pivoted downward with its lens 11, the dummy dummy 22 carries out the same pivoting movements, while the dummy lenses 12 and 21 perform opposite pivoting movements.

The device is fastened by means of supports 5 in a housing 40, 40 'which has four slots, which are regularly distributed over the housing and through which the lens 11 or the dummies 12, 21, 22 look outwards. The rings 10 and 20 serve as diaphragms, which prevent any view into the interior of the monitoring device.

In Fig. 2, two different, possible designs of the housing are shown simultaneously. The right half of FIG. 2 shows a housing embodiment 40, to which the device is attached under a ceiling wall 42, whereas the left half shows a housing embodiment 40 'in which the monitoring device is partially embedded in a ceiling wall 43. Both embodiments allow the use of the same device.

The housing 40 ′, 40 is designed, at least at its parties visible from the outside, in such a way that no conclusions can be drawn as to the true position of the camera 30.

As can already be seen from the above description, the camera 30 can be rotated on the one hand about an axis perpendicular to the ceiling wall by 360 ° and on the other hand can be pivoted about a horizontal pivot axis 32 through an angle of approximately 60 °, the uppermost position being approximately 5 ° the horizontal lies. This means that in addition to the points of sale, the ceiling areas can also be monitored, so that

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the monitoring device is able to keep the entire room under visual control, which can be particularly useful in connection with the detection of possible sources of fire.

The camera 30 has a device 33 (cf. FIG. 1 or 3) for continuously adjusting the focal length and the aperture of the camera lens (so-called zoom) and for adjusting the focus. This device 33 allows both an overview of a large part of the sales area to be carried out, as well as individual parts of the room, such as. B. frames, checkout, exit, mirrors, etc., to observe more closely. The camera 30 is connected to a screen (not shown) in an observation room.

The observer operates the monitoring device by means of a control device (not shown). The control device preferably has a programmable microprocessor (not shown), in which control programs which correspond to preferred observation sequences can be stored. The automatic observation processes can be interrupted and replaced by manual control of the movement and camera functions - for example, for the optical tracking of a suspicious or caught person.

By means of the control device, the camera can be switched on and off, rotated automatically or selectively to the left or right, and pivoted up and down. In addition, the focal length (zoom) and the sharpness of the objective lens can be changed. The rotation of the monitoring device can take place at two different speeds. A first speed level is selected so that with a suitable setting of the objective 11, observation during the rotation remains possible, while the second speed level is used for rapid setting of the camera in a specific direction of observation. The control device is designed in such a way that the camera is swiveled slightly downwards during automatic rotation and the lens is adjusted to a larger image section so that the television picture tube is not exposed too strongly to any bright ceiling lighting, which significantly increases the life of the camera.

Using the microprocessor (not shown), it is possible to coordinate the functions described in such a way that the observation sequences can be adapted to the conditions of each room. In particular, it is possible to use the monitoring device together with mirrors installed in the room. A sequence of movements includes e.g. B. the rapid swiveling of the camera on a mirror, the automatic adjustment of the image section to the mirror, observe in this position for 10 seconds, continue to pan to the next mirror after the image section has been enlarged again, readjusting the lens to the second Mirrors, remain in this position, swivel us to the till.

As is clear from the above description of an exemplary embodiment, the monitoring device according to the invention has manifold technical advantages over previously known devices.

The swiveling of the camera, together with the swiveling of the entire device, allows a complete observation of a room. Because mirrors can also be aimed at thanks to the camera’s ability to move, the device is able to create seemingly “blind spots” in the room,

such as to keep the sides of the frame facing away from the device under visual control. The dummy lenses move in the same way as the observing lens, which makes it impossible to find out what the dummy and what the real lens is, even if someone suspects that not all 4 existing "lenses" of the observation

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serve. The device according to the invention thus on the one hand increases the scope for observation by a multiple compared to the known solutions and at the same time increases the

The deterrent effect, in that a potential thief must feel observed more intensely, makes it impossible to recognize the real observation process from the outside.

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2 sheets of drawings