JP2000047292A - Pan and tilt camera apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a camera apparatus capable of miniaturizing a tilt case part by serving a case protecting a camera block as the tilt case part being an explosionproof case as well. SOLUTION: A case of an explosionproof structure is adopted as a tilt case part 31 and a camera block 32 from which a camera case is removed, is incorporated in the case part 31. A pan and tilt camera controller receives a video signal transmitted from the block 32 to project a picture on a monitor and further, superposes and transmits a signal for controlling the position of a pan and tilt camera main body 6 and the zooming of the block 32 on the video signal. The main body 6 transmits the picture caught by the block 32 as the video signal to the pan and tilt camera controller and separates a control signal which is superposed on the video signal and transmitted by an incorporated receiver circuit part and the direction of the block 32 is changed and the zooming is executed according to the command.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera for monitoring an abnormality in an industrial plant, and more particularly to a pan-tilt camera device having a horizontal and vertical rotation mechanism. In particular, the present invention relates to a pan-tilt camera device that can be easily miniaturized.

[0002]

2. Description of the Related Art FIG. 4 is an explanatory view of the configuration of a conventional example generally used in the prior art. In the figure, a pan-tilt camera controller 1 is connected to a monitor 2.
One end of the coaxial cable 3 is connected to the pan-tilt camera controller 1, and a signal in which a camera control signal is multiplexed with a video signal is transmitted.

A pan-tilt camera receiver 4 is connected to the other end of the coaxial cable 3 and separates a video signal and a camera control signal. The power supply 5 is connected to the pan-tilt camera receiver 4.

The pan / tilt camera main body 6 includes a base 7, a pan case 8 for performing a pan operation with the base 7, a tilt case 9 for performing a tilt operation with the pan case 8, and a tilt And a camera 11 built in the case 9.

A video signal cable 12 connects the pan-tilt camera main body 6 and the pan-tilt camera receiver 4,
This is a signal cable for transmitting a video signal. The motor drive signal cable 13 is a signal cable for connecting the pan / tilt camera body 6 and the pan / tilt camera receiver 4 and transmitting a motor drive signal.

FIG. 5 is a detailed view of a main part of the pan-tilt camera body 6 shown in FIG. 4, particularly used in factories and outdoors.
This is an example of the structure of a camera body that requires environmental resistance and an explosion-proof structure.

In FIG. 1, the tilt case 9 is supported by the pan case 8 by bearings 14 and 15.
In this case, a pressure-resistant explosion-proof case is used for the tilt case 9.

[0010] At the tip of the tilt case 9, there is provided a speed reduction mechanism 1.
6 and the tilt motor 17 are fixed. The rotation of the tilt motor 17 causes the tilt case 9 to rotate.
Is tilted.

The pan case 8 is supported on the base 7 by bearings 21 and 22. Bread case part 8
, A speed reduction mechanism 23 and a pan motor 24 are fixed. By rotating the pan motor 24,
The pan case 9 is panned.

In the above configuration, the image captured by the camera 11 is transmitted to the pan-tilt camera controller 1 as a video signal via the video signal cable 12 by the pan-tilt camera receiver 4.

At the same time, the control signal from the pan / tilt camera controller 1 superimposed on the video signal is separated by the pan / tilt camera receiver 4 and sent to the pan / tilt camera body 6 via the motor drive signal cable 13.

The pan / tilt camera body 6 performs a pan operation, a tilt operation and a zoom operation of the camera 11 based on a camera control signal.

[0013]

However, in such an apparatus, a commercially available general-purpose camera is employed as the camera 11 and the pressure-resistant explosion-proof case is employed as the tilt case 9. Therefore, since the general-purpose camera is housed in the explosion-proof case, the tilt case 9 becomes very large and the weight becomes heavy.

For this reason, in order to rotate the camera 11 to perform the pan-tilt operation, a powerful swivel is required. As a result, the size and weight of the entire apparatus are
It will be very large.

For example, conventionally, the size of the most compact explosion-proof pan-tilt camera device is 485 mmW × 545 m.
mH × 465 mmD, weight was 60 kg. As described above, when installing a large camera, there is a problem that when installing the camera, a sturdy dedicated table must be made, and in a narrow place, the installation must be abandoned.

The present invention solves these problems. An object of the present invention is to provide a pan-tilt camera device that can be easily miniaturized.

[0017]

In order to achieve this object, the present invention provides: (1) a pan-tilt camera controller and one end connected to the pan-tilt camera controller, wherein a camera control signal is multiplexed with a video signal. A coaxial cable through which a signal is transmitted, a pan case for performing a pan operation with respect to a base unit by a control signal of the camera, a tilt case for performing a tilt operation with the pan case, and a camera built in the tilt case A pan-tilt camera device comprising a pan-tilt camera body comprising: a tilt case portion employing a pressure-resistant explosion-proof structure case; and a camera block built in the tilt case portion and excluding the camera case. Pan-tilt camera device. (2) The pan-tilt camera apparatus according to claim 1, further comprising a self-diagnosis unit provided in the pan-tilt camera body for diagnosing an abnormality of the pan-tilt camera apparatus. (3) As self-diagnosis means, a temperature sensor provided on the pan-tilt camera body, a rotation sensor provided on a rotating shaft for performing the pan operation and the tilt operation, and a device based on the temperature sensor and a detection signal of the rotation sensor. 3. The pan-tilt camera device according to claim 2, further comprising: an abnormality diagnosis circuit for judging an abnormality of the camera and outputting and displaying an abnormality signal on the monitor. (4) A microphone device provided in the pan-tilt camera body, and audio output means for outputting audio collected by the microphone device together with the video signal on the monitor. 3. The pan-tilt camera device according to any one of 3. (5) The pan-tilt camera device according to (4), wherein the microphone device is provided so as to balance the rotation axis of the pan operation with respect to the camera body. (6) The pan-tilt camera device according to claim 4 or 5, wherein an intrinsically safe explosion-proof microphone device is used as the microphone device. It is what constituted.

[0018]

In the above arrangement, the pan / tilt camera controller receives a video signal sent from the camera. Further, the pan / tilt camera controller superimposes a signal for controlling the position of the main body of the pan / tilt camera, a zoom of the camera, and the like on the video signal and transmits the signal through a coaxial cable.

On the other hand, the pan-tilt camera body sends the image captured by the camera as a video signal to the pan-tilt camera controller. Also, the pan-tilt camera body separates a control signal from the pan-tilt camera controller multiplexed with the video signal and sent by the built-in pan-tilt camera receiver circuit unit, and according to the instruction,
Change the camera direction or zoom.

Thus, a camera block from which the camera case is removed is built in the tilt case portion in which the pressure-resistant explosion-proof structure case is adopted. Hereinafter, a detailed description will be given based on embodiments.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view of a main part of an embodiment of the present invention. In the figures, the same reference numerals as those in FIGS. 4 and 5 indicate the same functions. Hereinafter, only differences from FIGS. 4 and 5 will be described.

The case 31 has a pressure-resistant explosion-proof structure. The camera block 32 from which the camera case has been removed is built in the tilt case section 31.

In the above configuration, the pan-tilt camera controller 1 receives a video signal sent from the camera block 32 and displays an image on the monitor 2. Further, the pan / tilt camera controller 1 superimposes a signal for controlling the position of the pan / tilt camera main body 6 and the zoom of the camera block 32 on the video signal and transmits the signal via the coaxial cable 3.

On the other hand, the pan-tilt camera body 6 sends the image captured by the camera block 32 to the pan-tilt camera controller 1 as a video signal. The pan / tilt camera body 6 is multiplexed with a video signal and sent by a built-in pan / tilt camera receiver circuit unit.
The control signal from the pan / tilt camera controller 1 is separated, and the direction of the camera block 32 is changed or zoom is performed according to the command.

As a result, (1) Since the case for protecting the camera block 32 is also used as the tilt case 31 which is a pressure-resistant explosion-proof case, a pan-tilt camera device capable of reducing the size of the tilt case 31 is obtained.

(2) Since the camera block 32 is used, the size of the camera and its case can be reduced, the weight and inertia of the movable portion can be reduced, and the driving force can be reduced. As a result, a pan-tilt camera device capable of reducing the size of the entire pan-tilt camera device is obtained.

FIG. 2 is an explanatory view of a main part configuration of another embodiment of the present invention. In the figures, the same reference numerals as those in FIGS. 4 and 5 indicate the same functions. Hereinafter, only differences from FIGS. 4 and 5 will be described.

Conventionally, even if the pan / tilt camera body 6 breaks down, the failure cannot be known unless a human inspects it.
For this reason, it is not known whether it is functioning or not functioning as a surveillance camera, and it may not function at all as a surveillance camera.

In the present embodiment, the pan / tilt camera body 6 is provided with a self-diagnosis function, and when a failure occurs, its contents are displayed on the monitor 2 through the video signal coaxial cable 3. The maintenance staff is to perform maintenance according to the failure content displayed on the monitor 2.

The main failures of the pan / tilt camera main body 6 include a failure to rotate due to an obstacle and an extremely high temperature inside the pan / tilt camera main body 6.

In this embodiment, the temperature sensor 41 is provided in the pan-tilt camera body 6. Rotation sensor 4
Reference numerals 2 and 43 are provided on a rotating shaft that performs a pan operation and a tilt operation.

An abnormality diagnosis circuit 44 determines an abnormality of the pan / tilt camera device main body 6 based on detection signals of the temperature sensor 41 and the rotation sensors 42 and 43, and outputs and displays an abnormality signal on the monitor 2.

In the above configuration, the signals of the temperature sensor 41 and the rotation sensors 42 and 43 are processed by the abnormality diagnosis circuit 44, and when the temperature becomes abnormally high, or when the rotation signal is output to the drive mechanism, When the motor does not rotate, that is, when a failure occurs, the content is displayed on the monitor 2.

As a result, by providing the pan / tilt camera body 6 with a self-diagnosis function, a pan / tilt camera device capable of performing maintenance at an appropriate time can be obtained.
If a temperature sensor 41 and rotation sensors 42 and 43 are provided as a self-diagnosis function, a major failure can be checked and an inexpensive pan-tilt camera device can be obtained.

FIG. 3 is an explanatory diagram of a main part configuration of another embodiment of the present invention. In the figures, the same reference numerals as those in FIGS. 4 and 5 indicate the same functions. Hereinafter, only differences from FIGS. 4 and 5 will be described.

In the conventional pan-tilt camera device, the camera only picks up an image and does not have a function for taking sound. In the present embodiment, by attaching a microphone to the surveillance camera, it is possible to monitor not only the video but also the sound on the spot, so that more information can be obtained from the monitoring target.

In this embodiment, the microphone device 5
1 is provided on the pan-tilt camera body 6. The audio output unit 52 outputs the audio collected by the microphone device 51 on the monitor 2 together with the video signal.

In this case, the microphone device 51
It has a microphone 511 and a microphone case 512 containing the microphone 511. Further, the microphone device 51 is provided to be balanced with respect to the camera block 32 symmetrically about the rotation axis of the pan operation. Further, in this case, a Hon'an type microphone device is used as the microphone device 51.

As a result, by attaching the microphone to the pan-tilt camera body 6, in addition to the image,
Sound can also be collected, and more information can be obtained from the monitoring target.

Further, by mounting the camera 32 and the microphone 51 symmetrically with respect to the rotation axis, the camera 32 and the microphone 51 can be balanced and the torque required for the driving mechanism can be reduced. Therefore, a pan-tilt camera device in which the drive mechanism can be downsized can be obtained.

If a Hon'an type microphone is used as the microphone device 51, a pan-tilt camera device which can be easily used even in a poor atmosphere environment where intrinsically safe explosion is required can be obtained.

[0042]

As described above in detail, according to the first aspect of the present invention, (1) the case for protecting the camera block also functions as the tilt case portion which is a pressure-resistant explosion-proof case. A pan-tilt camera device capable of reducing the size of the case can be obtained.

(2) Since the camera block is used, the size of the camera and its case can be reduced, the weight and inertia of the movable portion can be reduced, and the driving force can be reduced. As a result, the pan-tilt camera device can be used. A pan-tilt camera device that can be reduced in size as a whole is obtained.

According to the second aspect of the present invention, a pan-tilt camera apparatus capable of performing maintenance at an appropriate time can be obtained by providing the pan-tilt camera body with a self-diagnosis function.

According to the third aspect of the present invention, since the temperature sensor and the rotation sensor are provided, a major failure can be checked and an inexpensive pan-tilt camera device can be obtained.

According to the fourth aspect of the present invention, by attaching a microphone to the pan-tilt camera body, in addition to video, audio can be collected, and more information can be obtained from the monitored object. .

According to the fifth aspect of the present invention, by mounting the camera and the microphone symmetrically with respect to the rotation axis, the camera can be balanced and the torque required for the drive mechanism can be reduced. Therefore, a pan-tilt camera device in which the drive mechanism can be downsized can be obtained.

Further, according to the sixth aspect of the present invention, since the intrinsically safe microphone is used as the microphone device, the pan-tilt which can be easily used even in a poor atmosphere where an intrinsically safe explosion is required is used. A camera device is obtained.

Therefore, according to the present invention, it is possible to realize a pan-tilt camera device that can be easily miniaturized.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a main part configuration of an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a main part configuration of another embodiment of the present invention.

FIG. 3 is an explanatory diagram of a main part configuration of another embodiment of the present invention.

FIG. 4 is an explanatory diagram of a configuration of a conventional example generally used in the related art.

FIG. 5 is a detailed explanatory view of a main part of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pan-tilt camera controller 2 Monitor 3 Coaxial cable 4 Pan-tilt camera receiver 5 Power supply 6 Pan-tilt camera main body 7 Base part 8 Pan case part 12 Video signal cable 13 Motor drive signal cable 14 Bearing 15 Bearing 16 Reduction mechanism 17 Tilt motor 21 Bearing 22 Bearing Reference Signs List 23 speed reduction mechanism 24 pan motor 31 tilt case part 32 camera block 41 temperature sensor 42 rotation sensor 43 rotation sensor 44 abnormality diagnosis circuit 51 microphone device 511 microphone 512 microphone case

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 5/225 H04N 5/225 F (72) Inventor Naoki Matsumoto 2-9-132 Nakamachi, Musashino City, Tokyo F term in Yokogawa Electric Corporation (reference) 2H105 AA12 AA14 DD06 DD08 EE08 EE35 5C022 AA01 AB62 AC01 AC13 AC27 AC63 AC71 AC75

Claims (6)

[Claims] 1. A pan-tilt camera controller, a coaxial cable having one end connected to the pan-tilt camera controller and transmitting a signal obtained by multiplexing a camera control signal into a video signal, and a base unit by the camera control signal A pan / tilt camera device comprising: a pan case unit performing a panning operation, a pan case unit performing a pan operation, a tilt case unit performing a tilt operation, and a camera built in the tilt case unit; A pan / tilt camera device, comprising: a tilt case portion adopting the above, and a camera block built in the tilt case portion and excluding a camera case. 2. The pan-tilt camera apparatus according to claim 1, further comprising a self-diagnosis means provided on said pan-tilt camera body for diagnosing an abnormality of said pan-tilt camera apparatus. 3. A self-diagnosis means, comprising: a temperature sensor provided on the pan-tilt camera body; a rotation sensor provided on a rotation shaft for performing the pan operation and the tilt operation; a detection signal of the temperature sensor and the rotation sensor; 3. The pan-tilt camera device according to claim 2, further comprising: an abnormality diagnosis circuit for judging abnormality of the device and outputting and displaying an abnormality signal on the monitor. 4. The apparatus according to claim 1, further comprising a microphone device provided in said pan-tilt camera main body, and audio output means for outputting audio collected by said microphone device together with said video signal on said monitor. The pan-tilt camera device according to claim 3. 5. The pan-tilt camera device according to claim 4, wherein the microphone device is provided so as to balance the rotation axis of the pan operation with respect to the camera body. 6. The pan-tilt camera device according to claim 4, wherein an intrinsically safe explosion-proof microphone device is used as the microphone device.