KR102351524B1 - Pan-tilt-zoom camera assembly with magnetic ring-based precise rotation control - Google Patents

Abstract

The present invention relates to a pan-tilt-zoom (PTZ) camera assembly with a magnetic ring-based precise rotation control function. According to the present invention, the PTZ camera assembly with the magnetic ring-based precise rotation control function comprises: a PTZ camera including a camera module photographing a video, and a motor connected to the camera module by a rotary shaft as the medium and rotating the camera module; a magnetic ring inserted into one side of the rotary shaft, and including a base and a rubber magnet placed on an upper surface of the base; an encoder installed around the magnetic ring, and including a recognition unit recognizing the rotation of the magnetic ring and a detection unit detecting rotation information including one or more of the rotation position and the rev count of the magnetic ring based on changes in the magnetic field in accordance with the rotation; and a controller controlling the driving of the motor based on the rotation information detected through the detection unit. According to the present invention, the PTZ camera assembly with the magnetic ring-based precise rotation control function is able to detect the rotation information including the rotation position and the rev count in a direction toward a pan and toward a tilt through the magnetic ring and the encoder, control the motor based on that, and make it possible to precisely control the rotation.

Description

PAN-TILT-ZOOM CAMERA ASSEMBLY WITH MAGNETIC RING-BASED PRECISE ROTATION CONTROL}

The present invention relates to a pan-tilt zoom camera assembly having a magnetic ring-based precision rotation control function. More specifically, the present invention relates to a pan-tilt zoom camera (PTZ Camera; Pan-Tilt-Zoom Camera) by adding a magnetic ring and an encoder. It relates to a pan/tilt zoom camera assembly in which the precision of rotation control in pan rotation and tilt rotation is increased.

In general, a PTZ camera equipped with a pan/tilt/zoom (PAN/TILT/ZOOM) function is a product that is installed on a ceiling in a specific place or an external wall/pillar, depending on the purpose.

In particular, such a PTZ camera system is installed in a specific place for a special purpose and used for monitoring images from a remote location to monitor all situations. It is generally installed in the upper part or the ceiling and is set toward a specific direction.

7 is a conceptual diagram illustrating a conventional PTZ camera.

Referring to FIG. 7 , the PTZ camera 100 can rotate in up-down and left-right directions. For this purpose, the general PTZ camera 100 tilts the head of the camera up and down by a certain angle with respect to the camera body. It includes a fan function that rotates the camera header by a certain angle left and right with respect to the function and the camera body.

It can be said that rotation control of the PTZ camera is very important in order to prevent the PTZ camera from creating a shooting blind spot. Accordingly, various technologies for controlling the rotation of the PTZ camera have been disclosed and are being developed.

As a prior art related to rotation control of such a PTZ camera, Korean Patent Registration No. 10-1903156 discloses a 'PTZ camera having a rotation structure of a camera head'.

The prior art relates to a PTZ camera having a rotating structure of a camera head, and more particularly, to a PTZ camera capable of controlling the rotation angle of a rotating body constituting a camera head.

To this end, the PTZ camera of the present invention includes a motor driven by external power, a pulley rotating by the motor, a rotating shaft connected to the pulley, rotating by the rotation of the pulley, and a rotation fixedly coupled to the rotating shaft A body, the motor and the pulley are accommodated, and a fixed body having a rotating rail formed at an upper end thereof in a circumferential direction and a fastening hole fastened to a lower surface of the rotating body at one side are formed, and the other side is formed on a rotating rail formed in the fixed body to move and a rotation stopper formed with a protrusion.

A PTZ camera with a rotating structure of a camera head forms a rotating rail with a rotation angle exceeding 360° at the top of the fixed body, one side is fastened to the rotating body, and the other side uses a rotation stopper that rotates on the rotating rail. There is a feature that the rotation angle of the rotating body can be adjusted.

However, in the case of a PTZ camera using such a rotation stopper, there is a disadvantage in that precise control of rotation is not possible, so there is an aspect that it is insufficient in precise rotation control necessary for a PTZ camera that provides a tracking shooting function for an object, etc.

Therefore, in order to solve the above-described problems, there is a need to develop a pan/tilt zoom camera assembly that can refine the rotation control function of the PTZ camera.

The main object of the present invention is to enable detailed rotation control by refining the control function of the pan direction rotation and the tilt direction rotation in the pan/tilt zoom camera.

Another object of the present invention is to memorize the existing rotational position value even when the power of the PTZ camera is turned off and to enable restoration to the original state based on backup data when restarting.

Another object of the present invention is to enable precise tracking of an object based on rotational precision control.

A further object of the present invention is to increase the degree of adhesion of the magnetic ring provided.

In order to achieve the above object, the pan/tilt zoom camera assembly having a magnetic ring-based precision rotation control function according to the present invention includes a camera module for capturing an image, and the camera module is connected to the camera module via a rotation axis to the camera module PTZ camera including a motor to rotate; a magnetic ring fitted to one side of the rotation shaft, the magnetic ring including a base and a rubber magnet provided on an upper surface of the base; Rotation information including at least one of a rotation position and number of rotations of the magnetic ring based on a change in a magnetic field according to a change in a magnetic field caused by a recognition unit recognizing the rotation of the magnetic ring and the rotation of the magnetic ring as installed around the magnetic ring. an encoder including a detection unit; and a controller for controlling driving of the motor based on the rotation information detected through the detection unit.

Furthermore, the rubber magnet includes a magnetic track including 60 to 65 pairs of N poles and S poles, and the recognition unit detects a change in magnetic force of the magnetic track to recognize the rotation of the magnetic ring. do.

In addition, the encoder includes a rotation position value calculation unit for calculating a rotation position value including a vertical direction and a horizontal direction of the current viewpoint of the PTZ camera, and the controller includes a position storage unit for storing the rotation position value; , characterized in that it comprises a backup control unit for controlling the driving of the motor to reach the rotation position value as the PTZ camera is switched to the ON state.

In addition, the encoder includes a rotation position value calculator for calculating a rotation position value including a vertical direction and a horizontal direction of the current view of the PTZ camera, and the controller includes a position value of an object photographed by the PTZ camera. It characterized in that it comprises an object position value calculation unit for calculating the object position value, and a precision object tracking unit for controlling the driving of the motor according to the difference between the object position value and the rotation position value is equal to or greater than a preset reference value.

A pan-tilt zoom camera assembly having a magnetic ring-based precision rotation control function according to the present invention,

1) It detects rotation information including rotation position and number of rotations in the pan and tilt directions through a magnetic ring and encoder, and controls the motor based on this to enable precise control of rotation,

2) By calculating the rotational position values in the vertical and horizontal directions and storing them as data, it is possible to restore the rotational position values based on the stored data even when the PTZ camera is turned off and restarted.

3) The vertical and horizontal rotational position values are compared with the object position value being photographed, and the rotation is controlled based on this, enabling precise object tracking.

4) By attaching the rubber magnet to the upper surface of the base through the adhesive layer, it has the effect of preventing the magnetic rubber magnet included in the magnetic ring from being easily separated from the surface of the base.

1 is a conceptual diagram showing the basic configuration of a PTZ camera.
Fig. 2 is a cross-sectional view of a camera assembly including a magnetic ring;
3 is a conceptual diagram illustrating a magnetic ring and an encoder.
4 is a block diagram showing the configuration of an encoder of the present invention.
5 is a block diagram showing the configuration of a controller according to the present invention.
6 is a cross-sectional view of the magnetic ring of the present invention.
7 is a conceptual diagram illustrating a conventional PTZ camera.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The accompanying drawings are not drawn to scale, and like reference numbers in each drawing refer to like elements.

1 is a conceptual diagram illustrating a basic configuration of a PTZ camera, FIG. 2 is a cross-sectional view illustrating a camera assembly including a magnetic ring, and FIG. 3 is a conceptual diagram illustrating a magnetic ring and an encoder.

1, 2, and 3, the pan/tilt zoom camera assembly 1 having a magnetic ring-based precision rotation control function of the present invention includes a PTZ camera 100 and a magnetic ring 200. , an encoder 300 , and a controller 400 .

The PTZ camera 100, that is, the Pan-Tilt-Zoom Camera, rotates in the left and right directions (Pan), in the vertical direction (Tilt), and zooms in and out of the object to be photographed (Zoom). As a camera capable of this, it is configured to include a camera module 110 and a motor and can rotate. In the case of zoom, this is usually implemented through electronic control. The PTZ camera 100 may include a camera module 110 , a rotation shaft 160 , and a motor.

Preferably, the camera module 110 includes a camera lens to perform a function of photographing an image of an object to be photographed, and may be referred to as a body including a configuration necessary for photographing. Furthermore, the camera module 100 is connected to the rotation shaft 160 , and a motor is connected to one side of the rotation shaft 160 . Accordingly, the camera module 100 is configured to be rotatable by driving the motor.

Here, the rotation includes vertical rotation and left and right rotation. For this purpose, the camera module 100 of the PTZ camera 100 may be supported through a separate connection bracket 120 , and the connection bracket 120 and By being connected and extended, the connection bracket 120 is rotated by the rotation of the rotating shaft 160 by the motor, so that the camera module 100 can be rotated.

In this case, since rotation can be possible only in the vertical or left-right directions, the connection bracket 120 is supported by the support bracket 140, and the end of the support bracket 140 is also connected to another rotation shaft 160. It can be rotated by a motor.

Therefore, the rotation shaft 160 may be a rotation shaft 160 for vertical rotation (tilt) or a rotation shaft 160 for horizontal rotation (tilt). Therefore, the rotation shaft 160 may be at least one of the rotation shaft 160 for vertical and horizontal rotation. The motor is also characterized in that it is provided for each rotation shaft (160).

In FIG. 2, only the rotation shaft 160 connected to the camera module, that is, the rotation shaft 160 connected to the connection bracket 120, is shown. It may be an example of the rotation shaft 160 connected to 140 . In FIG. 2, an example is shown only for the connection bracket 120, that is, a configuration for tilt rotation.

However, in the fan rotation in the same manner as in FIG. 2 , rotation is possible, and at this time, a motor, a magnetic ring 200 , and an encoder 300 are equally provided on the rotation shaft 160 . This will refer to the above-described rotation configuration and description in FIG. 1 .

Most simply, the PTZ camera 100 is tilted and rotated through a motor provided on the rotating shaft 160 extended from the connection bracket 120 , and the motor provided on the rotating shaft 160 extended from the support bracket 140 . Rotating the PTZ camera 100 through a pan may be described as an example.

That is, the connection bracket 120 supports the camera module 100 for tilt rotation, and the rotation shaft 160 extending to the connection bracket 120 is rotated by the tilt rotation motor 130 . Furthermore, the support bracket 140 supports the connection bracket 120 for fan rotation, and the rotation shaft 160 extending from the support bracket 140 is rotated by the fan rotation motor 150 . Therefore, the motor includes a tilt rotation motor 130 and a fan rotation motor 150 , and the rotation shaft 160 refers to the rotation shaft 160 extending from the connection bracket 120 and the support bracket 140 . It includes an extended rotation shaft 160 .

In this case, a counterweight may be installed in the connection bracket 120 to face the tilt rotation motor 130 in order to match the center of gravity with the rotation center of the fan rotation, and the support bracket 140 is the tilt rotation motor Since the motor 150 for rotating the fan is installed on the upper side to offset the center of eccentricity by 130, it is possible to minimize the torque disturbance by the pan and tilt rotation.

However, in addition to this method, if the rotation shaft 160 is connected to the camera module 100 to perform rotation of the camera module 100 through a motor, there is no particular limitation on the method, so the A rotational configuration may be applied. In this case, basically, one side of the camera module 100 should be connected to the rotation shaft 160 , and the rotation shaft 160 is rotated by a motor.

The magnetic ring 200 is fitted to one side of the rotation shaft 160, and includes a base 210 and a rubber magnet 220 (rubber magnet) provided on the upper surface of the base 210 and preferably attached. . Each of these magnetic rings 200 may be provided according to vertical / horizontal rotation, and in the above description, the rotation shaft 160 connected to the connection bracket 120 , and the rotation shaft 160 connected to the support bracket 140 , respectively. The magnetic ring 200 may be fitted to the side.

The magnetic ring 200 has a hollow and is fitted to one side of the rotary shaft 160 through the hollow, and through this, when the rotary shaft 160 is rotated through the motor, the magnetic ring 200 also rotates together.

Here, since there is no limitation on the material of the base 210, it may be made of a metal material or engineering plastic, etc., and a rubber magnet 220 is attached to the surface of the base 210 to generate a change in magnetic force due to rotation.

The rubber magnet 220 may be composed of a synthetic resin mixed with a metallic powder having magnetism, and preferably may have magnetism by including an anisotropic magnetic powder of ferrite. Furthermore, it is possible to reinforce the magnetism by further including a rare earth component.

In addition, most preferably, the N pole and the S pole can be arranged in pairs on the rubber magnet 220 of the magnetic ring 200, that is, N/S poles spaced apart from each other are continuously formed to configure the magnetic track. It is also possible, in this case, 60 to 65 pairs of N poles and S poles may be arranged in the magnetic track. That is, the rubber magnet 220 composed of a magnetic track may have a shape in which N poles and S poles are alternately arranged 60 to 65 times.

4 is a block diagram showing the configuration of the encoder of the present invention.

3 and 4, the encoder 300 detects the rotation information of the magnetic ring 200 on the basis of the rotation of the magnetic ring 200, most preferably the magnetic ring 200 It is installed to be fixed around. That is, it is installed on the upper surface of the magnetic ring 200 , that is, on one side of the upper surface of the rubber magnet 220 , to recognize the rotation of the magnetic ring 200 and to detect rotation information based thereon.

The encoder 300 is preferably a reader that reads information according to the rotation of the magnetic ring 200, and the magnetic ring 200 by detecting a change in the magnetic field as the rubber magnet 220 rotates. It recognizes the rotation of the motor, that is, the rotation of the motor, and detects rotation information based on the change in the magnetic field according to the rotation. To this end, the encoder 300 may include a recognition unit 310 and a detection unit 320 .

The recognition unit 310 recognizes the rotation of the magnetic ring 200, which is implemented by recognizing and processing a change in a magnetic field generated as the magnetic ring 200 is rotated by a motor. That is, when the motor is driven and the rotation shaft 160 rotates, the magnetic ring 200 fitted therein rotates together accordingly, so the rotation is recognized by sensing the change in magnetic force generated at this time.

The detection unit 320 detects rotational information including at least one of the number of rotations, the rotational direction, the rotational angle, and the rotational position of the magnetic ring 200 based on the change in the magnetic field according to the rotation. This is based on the change in the magnetic field due to rotation, that is, the phase of the waveform of the magnetic field generated by the induced voltage of the rotating magnetic field, to detect rotation information including the number of rotations, rotation speed, rotation direction, rotation angle, and rotation position. be able to That is, based on the change in the magnetic field, the encoder 300 receives a signal transmitted by the rotation of the rubber magnet 220, and analyzes it to detect rotation information including rotation speed, number of rotations, rotation direction, rotation angle, etc. use it

Here, since the magnetic signal transmitted by rotation preferably has a sine wave and a cosine wave waveform, it is analyzed by processing an inverse trigonometric function, preferably an inverse tangent function. Through this analysis, the number of rotations, rotation angle, rotation direction, etc. can be detected. In addition, the speed at which the magnetic signal transmitted through rotation is transmitted, that is, the wavelength of the magnetic signal is analyzed and the rotation speed can be detected based on this.

Here, since it was said that the rubber magnet 220 of the magnetic ring 200 described above may include a magnetic track including 60 to 65 pairs of N poles and S poles, it preferably has 120 poles to 130 poles. Decomposition performance is improved to maximize its precision.

Finally, in the case of the controller 400 , it serves to control the driving of the motor based on the rotation information of the magnetic ring 200 detected through the detection unit 320 of the encoder 300 . Here, the rotation information of the magnetic ring 200 is rotation information read by the detection unit 320 by analyzing the change in the magnetic field caused by the rotation of the magnetic ring 200, and as described above, rotation speed, number of rotations, rotation It said that it can include angle, rotation direction, rotation position, etc. Here, the rotational position value includes rotational values (rotation angles) for each of the horizontal and vertical directions.

Therefore, it is to control the driving of the motor based on this, which may include rotation speed control, rotation speed control, rotation angle control, rotation direction control, and the like of the motor. More preferably, the rotation angle and rotation position are controlled according to the rotational position value (vertical and horizontal coordinate values) of the object to be photographed, or the rotation angle and rotation direction are adjusted to position the photographing object in the center of the frame. It could be to control.

In other words, the rotation information analyzed by the encoder 300 on the magnetic triangular signal calculated from the magnetic ring 200 of the PTZ camera 100 and the position of the object being photographed in the image are compared through the comparison processing of the value. If there is a difference, it is possible to match the position information and rotation information of the object to be photographed by controlling the driving of the motor of the PTZ camera 100 .

In addition, the motor control according to the controller 400 may be to control the motors for the pan rotation and the tilt rotation, respectively, as described above, so that the control of the motors is the motor for the pan rotation 150 and the tilt rotation motor ( 130) control. In addition, it is also possible to simultaneously control these motors.

Accordingly, in the pan-tilt zoom camera assembly 1 of the present invention, by adding the configuration of the magnetic ring 200 and the encoder 300 to the PTZ camera 100 , the rotation position and rotation angle through the PTZ camera 100 . It has the effect of maximizing the precision of control.

5 is a block diagram showing the configuration of a controller according to the present invention.

5, it was said that in the case of the encoder 300 of the present invention, rotation information including the rotation position can be calculated, in more detail, the encoder 300 uses the rotation position value calculation unit 330 Including the rotation position value can be calculated.

Here, the rotational position value calculation unit 330 calculates a rotational position value including the vertical direction and the horizontal direction of the current time with respect to the PTZ camera 100 , which is the rotation shaft 160 of the fan rotation motor 150 . The rotational position value in the horizontal direction may be calculated through the magnetic ring 200 provided in the , and the encoder 300 provided together, and the magnetic ring 200 provided in the rotation shaft 160 of the tilt rotation motor 130 . ), and a rotational position value in the vertical direction can be calculated through the encoder 300 provided together.

Therefore, based on the encoder 300 for generating rotation information for the pan rotation and the encoder 300 for generating rotation information for the tilt rotation, the rotation position value including the horizontal direction and the vertical direction at the same time is calculated, Here, the rotational position value includes a value for a rotation angle in each of the horizontal and vertical directions, a coordinate value in the horizontal direction, and a coordinate value in the vertical direction.

That is, the rotation angle and coordinate values in the horizontal direction are calculated through the encoder 300 for generating rotation information for the fan rotation, and the rotation angle for each vertical direction through the encoder 300 for generating rotation information for the tilt rotation. A value for , and a coordinate value in the vertical direction may be calculated.

This may be referred to as information on rotation angles for each of the vertical and horizontal directions at the current time point, and may be used as storage and backup data by an additional configuration of the controller 400 . To this end, the controller 400 includes a location storage unit 410 and a backup control unit 420 .

The position storage unit 410 performs a function of storing the calculated rotation position value of the current time. This can also be said to perform a function of storing the backup data. In this case, the rotational position value is basically stored in the non-volatile memory so that it is not deleted even when the PTZ camera 100 is turned off.

The backup control unit 420 performs a function of controlling the driving of the motor to reach the stored rotational position value as the PTZ camera 100 is switched to the ON state. To this end, the driving of the fan rotation motor 150 and the tilt rotation motor 130 is controlled, respectively, and the fan rotation motor 150 is controlled according to the horizontal rotation angle included in the rotation position value, and vertical By controlling the tilt rotation motor 130 according to the direction rotation angle, even if the power of the PTZ camera 100 is turned off and restarted, it is possible to restore to the original state of the stored rotational position value.

Through this, it is possible to back up the rotational position value, that is, the position data, so that even when the power is turned off and restarted, the vertical (vertical) and left-right (horizontal) rotation control of the PTZ camera 100 with the corresponding rotational position value is possible. .

Therefore, it is possible to compensate for the loss of the rotational position value when the power is turned off in the configuration of the conventional magnetic ring 200 and the encoder 300, so that the rotational position value is not lost even when the power is turned off.

In addition, further from the configuration using the above-described rotational position value, tracking control based on the rotational position value may be performed on the object photographed through the PTZ camera 100. For this purpose, the controller 400 controls the object position value It may be configured to include a calculator 430 and a precision object tracking unit 440 .

The object position value calculating unit 430 performs a function of determining an object position value, which is a position value of an object photographed by the PTZ camera 100 . This is to capture an object position value including horizontal and vertical coordinate values of the object being monitored, that is, photographed by the PTZ camera 100 .

The precision object tracking unit 440 compares the object position value and the rotation position value and matches the rotation position value as the object position value when the difference between the object position value and the rotation position value is greater than or equal to a preset reference value in the result of the comparison processing It performs the function of controlling the driving of the motor so that Therefore, by controlling the rotation speed, rotation direction, rotation angle, and rotation position through this, the rotation position value and the object position value are matched.

Through such a configuration, it is possible to precisely control the rotation and position of the PTZ camera 100 so that the PTZ camera 100 tracks the position of the object, thereby enabling tracking and monitoring of the object.

6 is a cross-sectional view of the magnetic ring of the present invention.

6 , preferably, the rubber magnet 220 may be adhesively fixed to the upper surface of the base 210 through the adhesive layer 230 so as not to be separated from the upper surface of the base 210 . Although the rubber magnet 220 itself is made of a resin material and has viscosity, the adhesive layer 230 is formed between the rubber magnet 220 and the base 210 so that the rubber magnet 220 and the base 210 can be more firmly coupled. mediating adhesion.

The adhesive layer 230 preferably includes an adhesive composition containing n-butyl cyanoacrylate, where n-butyl cyanoacrylate is a transparent colorless liquid insoluble in water, As a material that is also used as a medical instant adhesive, it is known to have very good adhesion, and forms a hard film after curing to form a hard adhesive layer 230 that prevents the rubber magnet 220 from being easily separated from the surface of the base 210 do.

Therefore, the rubber magnet 220 can be more strongly adhered to the base 210 through the adhesive layer 230 including the adhesive composition including the n-butyl cyanoacrylate (n-Butyl cyanoacrylate). It is possible to prevent the rubber magnet 220 from being separated from the surface of the base 210 even in the rotation.

The pressure-sensitive adhesive composition may further include an additional composition in addition to n-butyl cyanoacrylate, and the pressure-sensitive adhesive layer 230 includes a step of preparing a first solution (S11), a step of preparing a second solution (S12), and the pressure-sensitive adhesive composition. It can be manufactured through the step (S13) of completing the.

(S11) preparing the first solution

First, 15 to 30 parts by weight of n-butyl cyanoacrylate, 40 to 60 parts by weight of polyvinylpyrrolidone, and 10 to 25 parts by weight of amodimethicone are mixed to prepare a first solution.

As described above, n-butyl cyanoacrylate is a material with strong adhesion that generates a hard film after curing as described above, and serves to provide adhesion of the adhesive layer 230 .

Polyvinylpyrrolidone is a polymer of N-vinyl-2-pyrrolidone, which serves as a solvent for n-butylcyanoacrylate and amodimethicone, and has adhesive properties by itself. Accordingly, the adhesiveness of the adhesive layer 230 may be aided by the addition of polyvinylpyrrolidone.

Amodimethicone is a siloxane polymer substituted with an amino group, and has excellent properties such as easy emulsification, excellent thermal stability, and excellent UV resistance and insulation performance. In addition, since it has adhesiveness, it serves to improve the adhesiveness of the adhesive layer 230 .

(S12) preparing a secondary solution

Next, 75 to 95 parts by weight of the first solution, (3-isocyanatopropyl) trimethoxysilane ((3-isocyanatopropyl) trimethoxysilane) 5 to 15 parts by weight, and amino-p-benzoquinone (Amino-p -benzoquinone) 3 to 10 parts by weight are mixed to prepare a secondary solution.

(3-isocyanatopropyl)trimethoxysilane is a silane-based compound, which increases interfacial adhesion in a hybrid material in which an organic material and an inorganic material are mixed and improves the film-forming ability of the adhesive layer 230. It is added to enhance properties.

Amino-p-benzoquinone (Amino-p-benzoquinone) is a benzoquinone-based compound has an effect of improving corrosion resistance due to high metal affinity. Through this, the corrosion resistance of the metallic material included in the base 210 and the rubber magnet 220 attached to the surface of the adhesive layer 230 may be improved.

(S13) Step of completing the adhesive composition

Finally, 85 to 95 parts by weight of the secondary solution, 1 to 5 parts by weight of triethylamine, and poly(2-ethylhexyl acrylate) (P2EHA: poly(2-ethylhexyl acrylate)) containing 1 to 10 parts by weight of the elastic auxiliary agent is mixed to complete the adhesive layer 230 composition.

Triethyl amine controls the pH of the prepared adhesive layer 230 composition and at the same time serves as a surfactant to increase the miscibility of each component included in the adhesive layer 230 composition. added for

The elastic auxiliary agent contains poly(2-ethylhexyl acrylate) as its active ingredient, which is a polymer added to improve processability. have Therefore, when poly(2-ethylhexyl acrylate) is added as an elastic auxiliary agent, processability is improved, and even when an impact is applied to the magnetic ring 200 from the outside, a shock absorption effect due to elasticity can be expected.

By applying this adhesive layer 230 composition to the surface of the base 210 and adhering the rubber magnet 220, the rubber magnet 220 is strong through the adhesive layer 230 having a high level of adhesiveness and adhesion. It can be adhered to the upper surface of the base 210 and, at the same time, prevent corrosion of metallic components included in the base 210 and the rubber magnet 220, and further absorb external shocks.
As described so far, the configuration and operation of the pan/tilt zoom camera assembly according to the present invention have been expressed in the above description and drawings, but these are merely examples and the spirit of the present invention is not limited to the above description and drawings, and the present invention is not limited thereto. It goes without saying that various changes and modifications are possible within the scope not departing from the technical spirit of the invention.

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

1: camera assembly 100: PTZ camera
110: camera module 120: connection bracket
130: tilt rotation motor 140: support bracket
150: motor for fan rotation 160: rotation shaft
200: magnetic ring 210: base
220: rubber magnet 230: adhesive layer
300: encoder 310: recognition unit
320: detection unit 330: rotation position value calculation unit
400: controller 410: position storage unit
420: backup control unit 430: object position value calculation unit
440: precision object tracking unit

Claims (9)

A pan/tilt zoom camera assembly with a magnetic ring-based precision rotation control function, comprising:
a PTZ camera including a camera module for capturing an image, and a motor connected to the camera module via a rotation shaft to rotate the camera module;
A rubber magnet, which is fitted to one side of the rotation shaft, and adhered to the upper surface of the base through an adhesive layer including an adhesive composition containing n-butyl cyanoacrylate (n-Butyl cyanoacrylate) A magnetic ring comprising;
Rotation information including at least one of a rotation position and number of rotations of the magnetic ring based on a change in a magnetic field according to a change in a magnetic field caused by a recognition unit recognizing the rotation of the magnetic ring and the rotation of the magnetic ring as installed around the magnetic ring. an encoder including a detection unit;
and a controller for controlling the driving of the motor based on the rotation information detected through the detection unit. The method of claim 1,
The rubber magnet is
It includes a magnetic track comprising 60 to 65 pairs of N poles and S poles,
The recognition unit,
The pan/tilt zoom camera assembly, characterized in that the rotation of the magnetic ring is recognized by detecting a change in the magnetic force of the magnetic track. The method of claim 1,
The encoder is
and a rotation position value calculation unit for calculating rotation position values including vertical and horizontal directions of the current viewpoint of the PTZ camera,
The controller is
a position storage unit for storing the rotation position value;
and a backup control unit for controlling driving of the motor to reach the rotational position value as the PTZ camera is switched to an ON state. The method of claim 1,
The encoder is
and a rotation position value calculator for calculating a rotation position value including a vertical direction and a horizontal direction of the current viewpoint of the PTZ camera,
The controller is
an object position value calculating unit for calculating an object position value that is a position value of an object photographed by the PTZ camera;
and a precision object tracking unit for controlling the driving of the motor according to a difference between the object position value and the rotation position value being greater than or equal to a preset reference value. The method of claim 1,
The adhesive composition,
1 by mixing 15 to 30 parts by weight of n-butyl cyanoacrylate, 40 to 60 parts by weight of polyvinylpyrrolidone, and 10 to 25 parts by weight of amodimethicone preparing a tea solution;
75 to 95 parts by weight of the first solution, (3-isocyanatopropyl) trimethoxysilane ((3-isocyanatopropyl) trimethoxysilane) 5 to 15 parts by weight, and amino-p-benzoquinone (Amino-p-benzoquinone) ) preparing a secondary solution by mixing 3 to 10 parts by weight;
An elastic auxiliary agent comprising 85 to 95 parts by weight of the secondary solution, 1 to 5 parts by weight of triethyl amine, and poly(2-ethylhexyl acrylate) (P2EHA: poly(2-ethylhexyl acrylate)) Completing the adhesive composition by mixing 1 to 10 parts by weight; characterized in that it is prepared through, the pan-tilt zoom camera assembly. delete delete delete delete

Images