KR20040086068A - Speed dome camera module - Google Patents

Abstract

PURPOSE: A speed dome camera module is provided to smoothly drive pan and tilt motors by accurately calculating a rotation reference position of a motor without error. CONSTITUTION: A camera supporting part(100) supports a camera board. A PCB supporting part(100b) is formed at one end of the camera supporting part. A tilt supporting part(100a) is formed at the other end of the camera supporting part. A tilt driving pulley is installed on an axis same with a tilt motor(115) in a tilt direction rotation driving unit. A tilt timing belt(116) is installed in the tilt direction rotation driving unit to transmit the rotation force of the tilt driving pulley to a tilt slave pulley(117). A tilt bearing(113) is installed in the tilt direction rotation driving unit to fix and support the tilt slave pulley to a tilt main supporting part. A contact asperity part(111) is formed in the tilt direction rotation driving unit to hold the rotation reference position of the tilt motor. A guide hole(112) is formed in the tilt main supporting part to guide the rotation position of the contact asperity part. A micro switch(114) is installed in the most end part of the guide hole to inform the reference position of the contact asperity part. A pan driving pulley(125a) is installed on an axis same with a pan motor(125) in a pan direction rotation driving part. A pan timing belt(126) is installed in the pan direction rotation driving part to transmit the rotation force of the pan driving pulley to a pan slave pulley. A pan bearing(123) is installed in the pan direction rotation driving part to fix and support the pan slave pulley to a pan supporting part. A reference asperity part(121) is formed at one side of the pan slave pulley to hold the rotation reference position of the pan motor. A photo coupler(124) is formed in one surface of the pan slave pulley to sense the position state of the reference asperity part.

Description

Speed dome camera module

The present invention relates to a surveillance camera, and more particularly, to a speed dome surveillance camera module for smoothly performing pan / tilt driving by attaching a sensor indicating a rotation reference position of a motor.

In general, surveillance cameras are classified into standard cameras, zoom cameras, dome cameras, and speed dome cameras.

The dome camera installed in consideration of the double interior has a disadvantage in that the shooting range is limited because only one point of the space is photographed because the camera is fixed.

What has emerged for this disadvantage is the speed dome camera that rotates in the left / right, up / down directions. The speed dome camera allows the camera to be rotated by 360 ° left / right (hereinafter referred to as 'pan') and 90 ° up / down (hereinafter referred to as 'tilt'), allowing you to capture any point in the space. .

The speed dome camera performs a position control of a place to be monitored using a stepping motor, and detects a reference position using a sensor.

Hereinafter, a structure of a speed dome camera according to the prior art disclosed in Korean Patent Laid-Open No. 2002-086077 will be described.

1 is a perspective view of a speed dome camera structure according to the prior art, and FIG. 2 is a side view of FIG. 1. 1 and 2, a conventional speed dome camera includes a body 2 on which a fan motor 1 is mounted; A pulley 14 axially fixed to the fan motor 1; A timing belt 3 having a less amount of backlash generated than a gear connected between the fan motor 1 and the pulley 14; A fan shaft 4 connected and driven through the pulley 14; A bearing (not shown) embedded in one end of the fan shaft 4; A fan case 5 rotatably supported by a bearing; A tilt case 6 fixedly supported at the other end of the fan shaft 4; A tilt motor 7 fixed to one side of the tilt case 6; The built-in tilt housing 17 is coupled to the tilt motor 7 and fixed to the tilt case 6 to rotate the camera 8 provided with the CCD board 15 for photographing in the vertical direction. A tilt shaft 9 rotatably fixed by a bearing (not shown), the tilt shaft 9 being spaced apart from one end of the tilt shaft 9 and fixed integrally by the bush 16; Bracket 10 is fixed to the camera 8 is rotated in the vertical direction in conjunction with the tilt shaft driving 9; A stopper 13 for limiting rotation in the tilt direction; Stoppers 11 and 11a for limiting rotation in the pan direction; And a locking step 12 for stopping the stoppers 11 and 11a when the fan shaft 4 rotates.

By the way, the conventional speed dome camera as described above can be rotated freely in the left and right, up and down direction by the pan tilt motor, but the motor rotation reference position calculated by the control unit because it limits the angle of rotation of the camera pan / tilt through the stopper Unlike when the motor is driven, the rotational direction of the motor is forcibly constrained by the stopper in the state in which the reference position value is incorrectly calculated, and thus an abnormality occurs in the rotation of the motor. There is a problem that an abnormality may occur in the controlling unit.

Therefore, the present invention has been made to solve the above problems, by introducing an electronic sensor at one end of the pan / tilt shaft to inform the rotation reference position of the motor to accurately calculate the rotation reference position of the motor without error. The purpose is to provide a speed dome camera module for smoothly driving the pan tilt motor.

In addition, by configuring the PCB substrate of the speed dome camera module to be integrally attached is another object to facilitate attachment and detachment to the speed dome camera exterior cover.

1 is a perspective view of a speed dome camera structure according to the prior art,

2 is a side view of FIG. 1;

3 is a perspective view of a speed dome camera structure according to a preferred embodiment of the present invention;

4 is a side view of FIG. 3;

<Description of the symbols for the main parts of the drawings>

100: camera support portion 100a: tilt support portion

100b: PCB support 105: camera

110: tilt main support 111: contact protrusion

112: guide hole 113: tilt bearing

114: microswitch 115: tilt motor

115a: Tilt drive pulley 116: Tilt timing belt

117: tilt driven pulley 120: pan support

121: reference protrusion 123: fan bearing

124: photocoupler 125: fan motor

125a: Fan drive pulley 126: Fan timing belt

127: fan driven pulley 130: main support

140: main PCB

The speed dome camera module according to the present invention for achieving this object is a pan / tilt rotation device of a speed dome type camera equipped with a fan motor / tilt motor, to support the camera board Camera support for doing; Printed Circuit Board (PCB) support provided at one end of the camera support: a tilt support provided at the other end of the camera support; A tilt drive pulley is installed on the same axis as the tilt motor, a tilt timing belt is installed to transmit the rotational force of the tilt drive pulley to the tilt driven pulley, and a bearing for fixing the tilt driven pulley to the tilt main support part is installed. A contact protrusion is formed to hold the rotational reference position of the motor, a guide hole for guiding the rotational position of the contact protrusion is formed in the tilt main support, and a guide hole at which the contact protrusion starts to inform the reference position of the contact protrusion. Tilt direction rotation drive unit is installed at the end of the micro switch; A fan drive pulley is installed on the same axis as the fan motor, a fan timing belt is installed to transmit the rotational force of the fan drive pulley to the fan driven pulley, and a bearing for fixing and supporting the fan driven pulley to the fan support part is installed. A reference protrusion is formed on one side of the fan driven pulley to hold the rotation reference position of the fan direction rotation driving unit formed on one surface of the outer circumferential surface of the fan driven pulley for detecting a position of the reference protrusion; And a main support part spaced apart from the bearing of the fan direction rotation driving part at a predetermined interval to support the camera module as a whole.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

3 is a perspective view of a speed dome camera structure according to a preferred embodiment of the present invention, Figure 4 is a side view of FIG.

As shown in Figure 3 and 4, the structure of the speed dome camera module according to the present invention is the camera support 100, tilt support 100a, PCB support 100b, the camera 105, the tilt main support 110 ), Contact protrusion 111, guide hole 112, tilt drive pulley 115a, tilt driven pulley bearing 113, microswitch 114, tilt motor 115, tilt timing belt 116, tilt driven Pulley 117, fan supporter 120, reference protrusion 121, photocoupler 124, fan motor 125, fan drive pulley 125a, fan timing belt 126, fan driven pulley 127, The main support 130, the main PCB 140 is made of.

The micro switch 114 is a switch that can open and close a large current compared to the small by using a snap mechanism, there is a portion (actuator) that is moved in accordance with the movement of the machine or device, thereby changing the electrical circuit, Used for mechanical automatic control. Therefore, when the contact protrusion 111 reaches the reference position P along the guide hole 112, the micro switch 114 is pressed to transmit an electrical signal ('on' signal) to the controller (not shown).

The photocoupler 124 includes a light emitting unit and a light receiving unit, and refers to an element that inverts the input side and the output side by reducing electricity to light or electricity to electricity in a transmission path. Therefore, when the reference protrusion 121 reaches the position of the photocoupler 124 according to the rotation of the fan driven pulley 127, light is blocked from the light emitting portion in the photocoupler 124 to the light receiving portion so that the photocoupler 124 is a control unit. An electrical signal ('off' signal) is output to the signal (not shown).

The main support unit 130 may be assembled (assy ') integrally with the main PCB 140 and formed as one module (or kit' kit ').

In addition, a network interface PCB (not shown) may be integrally installed at the bottom of the main support 130 and the main PCB 140 for network communication. Of course, if you choose a speed dome camera module with a built-in network interface PCB or do not choose a speed dome camera module that does not provide a network interface PCB, the network interface PCB may be an option item. will be.

The pan / tilt rotation method of the speed dome camera module made as described above is as follows.

First, the fan (left and right) rotation will be described. When power is supplied to the fan motor 125 and driven, the fan drive pulley 125a and the fan timing belt 126 fixed to the same axis as the fan motor 125 are described. The driving force through the fan driven pulley 127 is transmitted, the camera 105 is rotated in the left and right directions. At this time, the rotation is made in the 360 ° range.

When the reference protrusion 121 installed to hold the rotation reference position when the camera 105 rotates reaches the position where the photocoupler 124 is installed, the photocoupler 124 outputs an off signal. (Not shown) uses the fan motor 125 in this portion as a reference signal. Therefore, the controller (not shown) at each rotation is able to determine the reference position of the motor.

On the other hand, when the tilt (up and down) direction is described, when the power supply is driven to the tilt motor 115, the tilt drive pulley 115a and the tilt timing belt 116 fixed to the same axis as the tilt motor 115, Driving force through) is transmitted to the tilt driven pulley 117, the camera 105 is rotated in the vertical direction. At this time, the rotation is made within a 90 ° range.

When the contact protrusion 111 installed to hold the rotation reference position when the camera 105 rotates moves along the guide hole 112 to reach the point 'P', the microswitch 114 is turned on. The control unit (not shown) uses the rotation of the tilt motor 115 as a reference signal. Therefore, the controller (not shown) at each rotation is able to determine the reference position of the motor.

Therefore, in order to rotate the camera in the pan / tilt direction as described above, since the rotation reference position of each motor is processed electronically, the calculation of the rotation reference position of the motor is accurate, and thus the motor can be smoothly driven. In addition, the camera rotates exactly to the point where the user wants to shoot using the camera.

Although the preferred embodiments of the present invention have been described in detail above, those skilled in the art will appreciate that the present invention may be modified without departing from the spirit and scope of the invention as defined in the appended claims. It will be appreciated that modifications or variations may be made. Therefore, changes in the future embodiments of the present invention will not be able to escape the technology of the present invention.

As described above, in the present invention, unlike the conventional method in which the micro speed dome camera forcibly processes the rotational reference position of the motor by a physical machine such as a stopper, an electronic sensor (micro switch, photo coupler) is introduced and electronically. Because of the processing, there is no error in determining the reference position, and accordingly there is an advantage that can smoothly drive the motor.

Claims (7)

In a pan / tilt rotating device of a speed dome type camera equipped with a pan motor / tilt motor, A camera support for supporting the camera board; PCB (Printed Circuit Board) support provided at one end of the camera support: A tilt support provided at the other end of the camera support; A tilt drive pulley is installed on the same axis as the tilt motor, a tilt timing belt is installed to transmit the rotational force of the tilt drive pulley to the tilt driven pulley, and a bearing for fixing the tilt driven pulley to the tilt main support part is installed. A contact protrusion is formed to hold the rotational reference position of the motor, a guide hole for guiding the rotational position of the contact protrusion is formed in the tilt main support, and a guide hole at which the contact protrusion starts to inform the reference position of the contact protrusion. Tilt direction rotation drive unit is installed at the end of the micro switch; A fan drive pulley is installed on the same axis as the fan motor, a fan timing belt is installed to transmit the rotational force of the fan drive pulley to the fan driven pulley, and a bearing for fixing and supporting the fan driven pulley to the fan support part is installed. A reference protrusion is formed on one side of the fan driven pulley to hold the rotation reference position of the fan direction rotation driving unit formed on one surface of the outer circumferential surface of the fan driven pulley for detecting a position of the reference protrusion; And Speed dome camera module, characterized in that the main support for supporting the camera module as a whole spaced apart from the bearing of the fan direction rotation drive unit. The speed dome camera module of claim 1, wherein the speed dome camera module is formed to integrally attach the main PCB to the lower end of the main support part. The speed dome camera module of claim 1, wherein the camera uses a charge-coupled device (CCD). The speed dome camera module of claim 1, wherein the camera uses a zoom camera. The speed dome camera module of claim 1, wherein an angle at which the camera rotates in a horizontal direction as the fan motor rotates is within a 360 ° range. The speed dome camera module of claim 1, wherein an angle at which the camera rotates in the vertical direction according to the rotation of the tilt motor is within a range of 90 °. The speed dome camera module of claim 1, wherein a network interface PCB for network communication is integrally installed at the bottom of the main support and the main PCB.