JP3463382B2 - Head system - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera platform system, and more particularly to a camera which is operated by remote control of a tilt drive unit and a pan drive unit built in a camera body. And a pan head system located at a shooting position. 2. Description of the Related Art A camera for monitoring and the like installed in a building or the like is used by being fixed on a camera mounting plate of a camera platform. The camera mounting plate is supported by a tilt shaft extending from a side surface of the camera platform body, and the camera is tilted to a desired position by driving the tilt shaft by a tilt drive unit built in the camera platform body. Further, a pan axis extending from the lower portion of the pan head body is fixed on a mounting table, and the pan axis is driven by a pan driving unit built in the pan head body to pan the camera to a desired position. [0003] The tilt drive unit and the pan drive unit are remotely controlled by a remote control device. That is, when a joy stick of the remote control device is operated, the control signal is converted into a drive signal by a relay circuit. The signals are output to the tilt drive unit and the pan drive unit. The tilt drive unit and the pan drive unit
The tilt axis and the pan axis are driven based on the drive signal, and the camera is positioned at a shooting position designated by a joystick. [0004] By the way, in the conventional pan head, since a pan driving unit controls a panning position by a potentiometer having two terminators and one movable contact, pan operation is possible. The range is regulated to about 320 °. Thus, in the conventional camera platform, for example, when tracking and photographing a moving subject while panning, if the subject exceeds the pan operable range, the subject must be panned in the opposite direction. However, there is a disadvantage that a time loss occurs before that. The present invention has been made in view of such circumstances, and has as its object to provide a pan head system capable of expanding a pan operable range of a pan head body. According to the present invention, in order to achieve the above object, a pan driving unit is built in a camera platform body, and a pan operation of a camera is performed by driving the pan driving unit. In the camera platform system, an auxiliary drive unit that rotates the camera body in the pan direction is provided in the camera body, and the pan operation range of the camera is expanded by driving the camera auxiliary drive unit. I have. According to the present invention, the range in which the pan can be operated by the pan driver is limited when the pan driver drives the pan driver of the camera platform and shoots a moving subject while panning the camera. Then, next, the auxiliary driving unit is driven to pan the head body in the same direction. A preferred embodiment of a pan head system according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a sectional view showing an embodiment of a camera platform system according to the present invention, which is partially broken. A pan head system 10 shown in FIG.
And an auxiliary drive unit 14.
Is fixedly installed on a mounting table 15 via an auxiliary drive unit 14. The camera platform 12 has a camera mounting plate 18 for supporting the camera 16, and the camera mounting plate 18 has a left side surface extending from the side of the camera platform main body 20.
2 cantilevered. The tilt shaft 22 is rotatably driven about its axis 22A by a tilt drive unit including a motor, a worm wheel, and a worm gear (not shown) built in the camera platform body 20, and is supported by the camera mounting plate 18. The camera 16 can be tilted to a desired position. A pan shaft 24 is rotatably provided at a lower portion of the camera platform body 20 via a bearing 25. The pan shaft 24 is driven by a pan driving unit including a motor 26, a worm wheel 28, and a worm gear 30 built in the camera platform body 20. Further, the pan driving unit is provided with a potentiometer 32 built in the head body 20.
Controls the panning position. The potentiometer 32 is a resistor having two terminators and one movable contact. When the movable contact is positioned at one of the terminators during the pan operation,
The pan operation is controlled to stop. This allows
The pan operable range of the pan drive unit is restricted to about 320 °. The tilt drive unit and the pan drive unit are remotely controlled by a remote control device 34, that is,
When the joystick 36 of the remote controller 34 is operated, the control signal is converted into a drive signal by the relay circuit 38 and output to the motor of the tilt drive unit and the motor 26 of the pan drive unit. The control system of the pan drive unit will be described later. A pan shaft main body 40 is provided below the pan shaft 24.
Is fixed. As shown in FIG. 2, the pan shaft main body 40 has an annular swing seat 4 that constitutes the auxiliary drive unit 14 described above.
2 is rotatably supported on bearings 44 via bearings 44. In the auxiliary drive unit 14, a motor 48 and a worm wheel 50 driven by the motor 48 are disposed in an inner space 46 of the turning seat 42. The worm wheel 50 is meshed with a worm gear 52 fixed to a lower portion of the pan shaft main body 40, and transmits the rotational driving force from the motor 48 from the worm gear 52 to the pan shaft main body 40,
The entire camera platform 12 can be rotated in the pan direction. The panning position of the auxiliary drive unit 14 is controlled by a potentiometer 54 built in the swivel seat 42. The potentiometer 54 is a resistor having two terminators and one movable contact, like the potentiometer 32 (see FIG. 1) on the camera platform 12 side. Control is performed so that the panning operation is stopped when it is positioned at one of the terminators. Thus, the pan operable range of the auxiliary drive unit 14 is restricted to about 320 °. The auxiliary drive unit 14 is also connected to the remote control device 34
The control signal from the remote controller 34 is converted into a drive signal by the relay circuit 38 and output to the motor 48 of the auxiliary drive unit 14. Next, a control system for the pan operation will be described with reference to a block diagram shown in FIG. The control system includes a pan control system indicated by reference numeral 56 on the camera platform 12 side and a pan control system indicated by reference numeral 58 on the auxiliary drive unit 14 side. The pan control system 56 of the camera platform 10 includes a switch 60 and a motor driver 62. A drive signal from the relay circuit 38 and a voltage signal from the potentiometer 32 indicating the panning position of the camera 16 are output to the switch 60. When the driving signal is output from the relay circuit 38, the switch 60 is turned on until the maximum value or the minimum value of the voltage signal is output from the potentiometer 32, that is, until the pan operation limit by the pan driving unit is reached. During this period, a signal for driving the motor 26 is output to the motor driver 62. Also, the switch 60
When the maximum value or the minimum value of the voltage signal is output from the potentiometer 32, that is, when the pan operation limit is reached, the output is turned off and the motor 26 is stopped. On the other hand, the pan control system 58 on the auxiliary drive unit 14 side
Includes a switch 64 and a motor driver 66. The switch 64 outputs a drive signal from the relay circuit 38, a voltage signal from the potentiometer 32 indicating the panning position of the camera 16, and a voltage signal from the potentiometer 54 indicating the panning position of the camera platform 12, respectively. The switch 64 is turned on until the maximum value or the minimum value of the voltage signal is output from the potentiometer 32, that is, until the pan operation limit by the pan driving unit is reached.
The FF state is continued. The switch 64 is turned on when the maximum value or the minimum value of the voltage signal is output from the potentiometer 32, that is, when the pan operation limit is reached, and outputs a signal for driving the motor 48 to the motor driver 66. Next, the operation of the head system configured as described above will be described. When the joystick 36 is operated to track and shoot a horizontally moving subject, first, the pan driving unit on the camera platform 10 drives to pan and shoot the camera 16 to track and shoot the subject. Then, when the pan operable range of the pan driving unit reaches the limit of 320 ° during the tracking shooting, the pan driving unit on the camera platform 12 stops. At the same time as this stop operation, the auxiliary drive unit 14 starts to operate, and the pan head body 20 starts to pan in the same direction as the pan direction by the motor 48 on the auxiliary drive unit 14 side. Thus, in the present embodiment, a moving subject that cannot be completely tracked and photographed by the pan drive unit on the camera platform 12 side can be continuously tracked and photographed by the operation of the auxiliary drive unit 14. Therefore, if the pan head system 10 of this embodiment is used, the pan operation range of the pan head 12 is 3
A pan operation possible range of 640 ° can be obtained by 20 ° and 320 ° of the photographable range of the auxiliary drive unit 14. In this embodiment, the pan head system using one auxiliary drive unit 14 has been described. However, by connecting a plurality of auxiliary drive units 14 in series, the pan operable range can be further increased. it can. As described above, according to the camera platform system of the present invention, the camera body has the auxiliary drive unit for rotating the camera body in the pan direction. You can extend the range of pan operation that you have.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a pan head system according to an embodiment of the present invention, including a partial cutaway. FIG. 2 is a cross-sectional view illustrating an embodiment of an auxiliary drive unit. FIG. 10 is a block diagram showing a control system between the camera and the auxiliary drive unit. [Description of References] 10: Head System 12: Head 14: Auxiliary Drive 16: Camera 20: Head Body 32, 54 Potentiometer 34 Remote Controller 40 Pan axis body

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H04N 5/222 G03B 17/56

Claims (1)

(57) [Claim 1] In a pan head system in which a pan driving unit is built in a pan head main body and a pan operation of a camera is performed by driving the pan driving unit. A pan head system, wherein an auxiliary drive section for rotating the main body in the pan direction is provided in the pan head main body, and the pan operation range of the camera is expanded by driving the auxiliary drive section.