JPH11331823A - Camera monitor system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow one set of camera controller to control plural cameras. SOLUTION: The camera monitor system is provided with cameras 2-11-2-n4 that photograph an object and camera controllers 1-1-1-n to control the cameras 2-11-2-n4. Control information is sent/received between control sections 10-1-10-n of the camera operation devices 1-1-1-n and control sections 20-1-20-n4 of the cameras 2-11-2-n4 through buses 5-1-5-n.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera monitoring system used for industrial monitoring and security monitoring.

[0002]

2. Description of the Related Art As shown in FIG. 12, a conventional camera monitoring system includes camera devices 101-1 to 10-1 for imaging a subject.
Camera operating device 100 for performing control for each 101-n
-1 to 100-n are provided correspondingly. Each of the camera devices 101-1 to 101-n is provided with consoles 102-1 to 102-n for an operator to input instructions and monitors 103-1 to 103-n for displaying images. ing.

For this reason, there is a problem that the number of camera operating devices increases as the number of camera devices is increased. Also, since each camera operating device is independent, it was not possible to control a camera device other than those connected to the camera operating device.

When transmitting control information from the camera device to the camera operating device, as shown in FIG. 13, the control information is multiplexed and transmitted in a V blanking period 160 of a retrace period 150 of the vertical synchronization signal. doing.

However, in such a method, the V blanking period 160 is as short as about 60 ms, and the amount of information that can be transmitted at one time is limited. In addition, since the retrace period 150 of the vertical synchronization signal occurs at intervals, it is necessary to store information to be transmitted and transmit an amount that can be multiplexed when the retrace period 150 described above arrives. Memory is required for this purpose, and the processing is cumbersome.

Further, when an image captured by a camera device connected to another camera operating device is viewed on a monitor connected to each of the plurality of camera operating devices, FIG.
As shown in FIG. 4, the video signal of the camera device 101-1 is distributed to the camera operating devices 100-1 to 100-5 by the video distributors 105-1 to 105-5, and
-2 is distributed to the camera operating devices 100-1 to 100-5 by the video distributors 106-1 to 106-5, and the video signal of the camera device 101-3 is distributed to the video distributor 107-1.
Camera operating devices 100-1 to 100-
And the video signals from the camera device 101-4 are distributed by the video distributors 108-1 to 108-5 to the camera operating device 100.
-1 to 100-5, and the video signal of the camera device 101-5 needs to be distributed to the camera operating devices 100-1 to 100-5 by the video distributors 109-1 to 109-5.

[0007]

According to the above arrangement, an image based on a video signal captured by a camera device connected to another camera operating device can be viewed on a monitor connected to any of the camera operating devices. Although it is possible, a large number of video distributors and wiring are required, which causes a problem that the configuration becomes large and complicated.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the conventional camera monitoring system as described above, and its object is to control a plurality of camera devices by one camera operating device. Another object of the present invention is to provide a camera monitoring system capable of controlling a camera device connected to a camera operating device other than the camera operating device. Another object of the present invention is to provide a camera monitoring system capable of viewing an image captured by a camera device connected to another camera operating device without increasing the size and complexity of the configuration. Another object of the present invention is to provide a camera monitoring system which can send a necessary and sufficient amount of control information at a time without having to send control information in a divided manner.

[0009]

According to a first aspect of the present invention, there is provided a camera monitoring system including a camera device for capturing an image of a subject, and a camera operating device for controlling the camera device. The transmission and reception of control information between the control unit of the camera operating device and the control unit of the camera device are performed via a bus. Thus, transmission and reception of control information between the control unit of the camera operating device and the control unit of the camera device are performed via the bus.

[0010] In the camera surveillance system according to the second aspect, the bus is provided in the camera operating device, and an extended interface for interconnecting with a bus of an adjacent camera operating device is provided. This makes it possible to interconnect the adjacent camera operating devices by the bus.

[0011] The camera monitoring system according to claim 3 is
A control unit of a plurality of camera devices is connected to a bus of one camera operating device. Thereby, a plurality of camera devices can be controlled by one camera operating device.

[0012] The camera monitoring system according to claim 4 is
In a camera monitoring system including a camera device for capturing an image of a subject and a camera operation device for controlling the camera device, the camera device multiplexes a video signal obtained by imaging with control information and multiplexes the control information. A bidirectional multiplexing unit for separating control information coming from the camera operating device is provided, while the camera operating device separates a multiplexed signal coming from the camera device into a video signal and control information. And a video separation control transmitting section for transmitting control information to the camera operating device side. Thus, the video signal and the control information are transmitted and received by the signal multiplexed between the camera device and the camera operation device.

In the camera surveillance system according to the fifth aspect, the bidirectional multiplexing unit and the video separation control transmitting unit include a resistor provided between the transmission source and the transmission line, and a potential difference between the resistors. And a differential amplifier that outputs a signal when the voltage on the transmission line side is higher than the voltage on the transmission source side. Thus, the output from the differential amplifier is obtained only for the signal arriving from the transmission path side, and can be separated from the signal to the transmission path side.

A camera monitoring system according to claim 6 is
An output terminal connected to a monitor and a first input terminal connected to the camera device, in a camera monitoring system including a camera device for capturing an image of a subject and a camera operating device for controlling the camera device. And a second input terminal for receiving a video signal from an adjacent camera operating device, wherein the selector selects one of the video signals coming from the first and second input terminals and outputs the selected video signal to the output terminal It is characterized by having. Thereby, one of the video signal coming from the first input terminal connected to the camera device and the video signal coming from the second input terminal for receiving the video signal from the adjacent camera operating device is selected. Output to the monitor, the user can view an image based on a video signal from a camera device connected to the camera operating device of the own device or a video signal from another camera operating device.

[0015] A camera monitoring system according to claim 7 is
The selector is provided with a third input terminal for receiving a video signal from another adjacent camera operating device, and selects one of the video signals coming from the first, second, and third input terminals. The signal is output to the output terminal.
Thereby, the camera operating device is connected to both ends, and the image based on the video signal from the camera device connected to the camera operating device of the own device or the video signal from one of the other two camera operating devices is formed. You can see.

[0016] The camera monitoring system according to claim 8 is
In a camera monitoring system including a camera device for capturing an image of a subject and a camera operating device for controlling the camera device, the camera operating device includes control information of a control unit of the camera operating device, A bus for transmitting and receiving control information of the control unit, and an extended interface for interconnecting with a bus of an adjacent camera operating device, and a plurality of buses connected to a plurality of camera devices are provided by the extended interface. It is characterized by being interconnected. Thereby, the plurality of camera operating devices connected to the plurality of camera devices are cascaded by the bus, and the plurality of camera devices can be controlled from any camera operating device.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A camera monitoring system according to an embodiment of the present invention will be described below with reference to the drawings. In the respective drawings, the same components are denoted by the same reference numerals, and redundant description will be omitted. FIG. 1 shows a schematic configuration of the camera monitoring system. In this system, camera operating units 1-1 to 1--1
camera device 2-11 that captures an image of a subject in each of n
2-14, 2-21 to 2-24, ..., 2-n1
2-n4 is connected, the consoles 3-1 to 3-n and the monitor 4
-1 to 4-n are connected.

The camera operating units 1-1 to 1-n are connected to a bus 5
(5-1 to 5-n), and the bus 5 is connected to the camera devices 2-11 to 11 through control units 10-1 to 10-n of the camera operation units 1-1 to 1-n and signal lines. 2-14, 2-
.., 2-n1 to 2-n4 control units 20-11 to 20-14, 20-21 to 20-24,.
.., 20-n1 to 20-n4 are connected. Camera devices 2-11 to 2-14, 2-21 to 2-24, ...
-Control units 20-11 to 20-1 of 2-n1 to 2-n4
4, 20-21 to 20-24, ..., 20-n1-2
Control information sent from 0-n4 is stored in buffers 6-11 to 6-11.
6-14, 6-21 to 6-24, ..., 6-n1 to 6
-N4 leads to bus 5. Camera operating devices 1-1 to 1-
The control information sent from the n control units 10-1 to 10-n is transmitted to the camera devices 2-11 to 2-14, 2-
.., 2-n1 to 2-n4 control units 20-11 to 20-14, 20-21 to 20-24,.
.., 20-n1 to 20-n4.

FIG. 2 shows a camera operating device 1 (1-1 to 1--1).
The detailed configuration of n) is shown. Video separation control transmission units 12-1 to 12-4 are connected to the camera device. Buffers 14-1 and 14-2 for receiving video signals from adjacent camera operating devices are provided.
The outputs of 4-1 and 14-2 are sent to the selector 11. The selector 11 is provided with the video signals separated by the video separation control transmission units 12-1 to 12-4. Note that the number 4 of camera devices that can be connected is merely an example.

The camera operating device 1 shown in FIG. 2 is provided with a CPU 21 for controlling the operating device.
Numeric keypad 27 for inputting data, information and instructions via I / O port 25, panel switch (SW) 28, display unit 29 for displaying status and alarm, external operation interface for providing operation keys and the like outside ( IF) 30 is connected. The CPU 21 has a bidirectional RAM 22
Is connected to the communication processing unit 23 via the. The communication processing unit 23 is connected to the AM modulation / demodulation units 13-1 to 13-4 via the bus 5 (corresponding to 5-1 to 5-n in FIG. 1). An interface (I / F) 26 is connected to the bus 5 so that the interface (I / F) 26 is connected to a bus of an adjacent camera operating device via an interface (equivalent to 26) of the adjacent camera operating device. Has become.

The video separation control section 12 (12-1 to 12-4), the AM modulation / demodulation section 13 (13-1 to 13-4) and the camera apparatus 2 (2--1) in the camera operating device 1 configured as described above. 11-2-14, 2-21 to 2-24, ...
, 2-n1 to 2-n4) are shown in FIG. The right side in FIG. 3 is the video separation control unit 12.
(12-1 to 12-4) and the AM modulator / demodulator 13 (13-1)
13-4), and the left side is a corresponding portion inside the camera device 2. A coaxial cable 31 is used as a transmission path between the camera device and the camera operation device. The transmission / reception separation units 32 and 42 are connected to the coaxial cable 31.

The transmission / reception separation units 32 and 42 are configured, for example, as shown in FIG. That is, the coaxial cable 31
, Via the amplifier 52. A resistor 5 is provided between the output terminal of the amplifier 52 and the coaxial cable 31.
1 is connected, and a potential difference between both ends of the resistor 51 is detected by a differential amplifier 53 using an operational amplifier. The inverting input terminal (-) of the operational amplifier is connected to the output terminal side of the amplifier 52, and the non-inverting input terminal (+) is connected to the coaxial cable 31 side.
The differential amplifier 52 has a non-inverting input terminal (+)
The potential of the inverting input terminal (-) is subtracted from the potential of
An output is generated only when this value is positive. For this reason, depending on the signal sent from the amplifier 52, a potential difference occurs between both ends of the resistor 51, and the potential of the inverting input terminal (−) becomes higher than the potential of the non-inverting input terminal (+). No output is available. On the other hand, for a signal 54 indicated by a broken line arriving from the opposite side via the coaxial cable 31, the resistor 51
, The potential of the non-inverting input terminal (+) increases, and the potential of the inverting input terminal (-) increases.
Only the signal arriving from the opposite side via
2 can be obtained.

Referring again to FIG. 3, the camera apparatus sends the signal to a low-pass filter 34 for removing high-frequency components of a video signal such as NTSC obtained by a television camera. The control information signal transmitted to the camera controller is AM-modulated by the AM modulator 36 and passed through a predetermined frequency band by the band-pass filter 35. The video signal that has passed through the low-pass filter 34 and the control information signal that has passed through the band-pass filter 35 are added and multiplexed by the adder 33, and the transmission / reception separating unit 3 already described
2 to the coaxial cable 31.

The multiplexed signal reaches the transmission / reception separation unit 42 on the camera controller via the coaxial cable 31.
The signal is amplified by a required gain by a cable compensating circuit 42 composed of an amplifier or the like, and the low-pass filter 44
And a band-pass filter 45. A video signal is extracted by passing the multiplexed signal through the low-pass filter 44, and a signal in which the control information is AM-modulated is extracted by passing through the band-pass filter 45. The AM-modulated signal is demodulated by the AM demodulator 46 to be sent to the bus 5 as control information.

On the other hand, the CPU 21 shown in FIG.
The control information signal written in the control signal 22, taken out by the communication processing unit 23, and sent via the bus 5 is modulated by the AM modulator 48 and passed through a predetermined frequency band via the band-pass filter 47. Is transmitted to the coaxial cable 31 via the transmission / reception separation unit 42. This signal is received by the transmission / reception separation unit 32 via the coaxial cable 31, separated, amplified by a required gain by a cable compensation circuit 37 composed of an amplifier or the like, supplied to a band-pass filter 38, and AM-modulated. Signal. The AM-modulated signal is demodulated by the AM demodulator 39 and transmitted as control information.

The camera device 2 is configured, for example, as shown in FIG. In other words, a bidirectional multiplexing unit 66 composed of various units shown on the left side of the coaxial cable 31 in FIG. 3, a camera unit 67 for capturing an image of a subject, obtaining a video signal, and sending it to the bidirectional multiplexing unit 66, A communication processing unit 68 for performing communication with the communication processing unit 23 according to a predetermined protocol, a bidirectional RAM 69, and a CPU 6 for integrally controlling the camera device 2
1 is provided. The CPU 61 has an I / O port 6
2, motors 63 to 65 are provided. The motor 63 is, for example, a motor for performing zooming, the motor 64 is, for example, a motor for horizontally rotating the camera unit 67, and the motor 65 is, for example, a motor for vertically rotating the camera unit 67.

The communication processing unit 23 of FIG. 2 and the communication processing unit 68 of FIG. 5 communicate control information via the bus 5 according to the following protocol. The control information includes one or a plurality of destinations (including a broadcast) and information of one transmission source. The communication processing unit that has received the transmission fetches the destination information if it belongs to the own device, and If it does not match the destination information, it is discarded. If a transmission has been received, a response is returned.
If there is no response, it is determined that a collision has occurred in the transmitted information, and transmission is performed again after a time determined using a random number or the like. The camera devices 2-1 to 2-n return a response when receiving the driving instruction.
It is possible to know the control states of the camera devices 2-1 to 2-n.

When an instruction is given from the CPU 21 of the camera operating unit 1-1 by the system configured as described above, the instruction is sent to the bus 5 (5-1 to 5-n), and the camera device 2-11 to 2-n is sent. 14, 2-21 to 2-24,..., 2
Since the CPU 61 of -n1 to -n4 receives the instruction, an instruction can be given to any camera device. When an instruction is given from the CPU 21 of a plurality of camera operating devices, the CPU 61 of the instructed camera device performs processing based on the instruction. For example, horizontal turning, vertical turning, and zoom are instructed from another camera operating device. Accordingly, it is possible to cause the camera unit 67 of the camera device to perform the corresponding combined motion.

Further, the camera operating device 1 shown in FIG. 2 is cascaded as shown in FIG.
-1 to 1-n can be created.
Video separation control transmitting units 12-1 to 12-4 of the camera operating units 1-1 to 1-n are provided with camera devices 2-11 to 2-14,
2-21 to 2-24,..., 2-n1 to 2-n4 are connected, and buses 5-1 to 5-n between the camera controllers 1-1 to 1-n are connected to terminals TRXA and TRXB of the interface 26.
-N is connected. In addition, two video signal input terminals V
IN and two video signal output terminals VOUT
A link for transmitting and receiving video signals is formed between the adjacent camera controllers 1-1 to 1-n. Then, the console 3-1 is connected only to the camera operating device 1-1, and the monitor 4-1 is connected to one output terminal VOUT of the camera operating device 1-1.

As a result, the console 3-1 of the camera operating unit 1-1 transmits the camera devices 2-11 to 2-14 and 2-21.
, 2 to 24,..., 2-n1 to 2-n4, control can be performed by giving control information, and control information (response and status information) can be transmitted from the corresponding camera device. You can receive. Also, the camera operating device 1-1-1
The monitor devices 4-1 to 2-14, 2-21 to 2-24,.
It is possible to project an image based on a video signal from any of 2-n1 to 2-n4 and perform centralized monitoring and management.

Further, as shown in FIG. 7, three camera operating devices 1 shown in FIG. 2 can be cascaded to create a system using the camera operating devices 1-1 to 1-3. In this system, the console 3-1 and the monitor 4-1 are connected to the camera controller 1-1 as in the configuration of FIG. 6, and the console 3-3 is also connected to the camera controller 1-3. And
The monitor 4-3 is connected to one output terminal VOUT of the camera controller 1-3.

With the above configuration, the camera operating device 1-1
In addition to the instruction monitoring by the operator, the console 3 of the camera operating unit 1-3
-3 to camera devices 2-11 to 2-14, 2-21 to 2
-24, 2-31 to 2-34, control information can be given and control can be performed, and control information (response and status information) can be received from the corresponding camera device. Further, a monitor 4-3 connected to one output terminal VOUT of the camera operating unit 1-3 is provided with a camera device 2-
11-2-14, 2-21 to 2-24, 2-31 to 2-
An image based on a video signal from any one of the above 34 can be displayed, and centralized monitoring management can be performed.

Further, by cascading two camera operating devices 1 shown in FIG. 2 as shown in FIG. 8, a system using the camera operating devices 1-1 and 1-2 can be created. In this system, the console 3-1 and the monitor 4-1 are not connected to the camera operating unit 1-1, and the camera operating unit 1--1 is not connected.
2 is connected to an operation console 3-2, and one of the camera operation units 1-2 is connected to the operation console 1-2.
The monitor 4-2 is connected to two output terminals VOUT.

With this configuration, the operation console 3-2 of the camera operating unit 1-2 is used to connect the camera devices 2-11 to 2-14, 2-
Control information can be given to any of 21 to 24 to perform control, and control information (response and status information) can be received from the corresponding camera device. In addition, the monitor 4-2 connected to one output terminal VOUT of the camera operating unit 1-2 has the camera devices 2-11 to 2-1 connected thereto.
4, an image based on a video signal from any of 2-21 to 2-24 can be displayed, and centralized monitoring management can be performed.

As is clear from FIG. 1 and FIG.
The control units 10-1 to 10-n of -1 to 1-n are also mutually connected by the bus 5, and the CPUs 21 of the control units 10-1 to 10-n are operated by the communication processing unit 23 according to the above-described protocol. Communicate with each other. Then, each CPU 21 controls each selector 11 based on this communication. Thus, as shown in FIG. 10, the monitors 4-1 to 4-5 are connected to one of the output terminals VOUT extending from the respective selectors 11, respectively. Images obtained from the same camera device can be displayed.

Here, in order to simplify the explanation, only one camera device is connected to each of the operation devices 1-1 to 1-5, and the three-input one-output device shown in FIG. The selector 71 is used. The video separation control unit 12 (12-1 to 12-4) connected to the camera device 2 is connected to the input line 72 of the selector 71. The input lines 73 and 73 of the selector 71 are connected to an input terminal VIN for receiving a video signal from an adjacent camera operating device. Output lines 75 and 76 branched from one output terminal of the selector 71 are connected to an output terminal VOUT for outputting a video signal to an adjacent camera operating device.

The camera operating devices 1-1 to 1-1 having the above configuration
10 are cascade-connected as shown in FIG. 10 and monitors 4-1 to 83-5 are provided on lines 83-1 to 83-5 extending from one of the two output terminals VOUT and reaching the input terminal VIN of the adjacent camera controller. Connect 4-5. Lines 82-1 to 82-4 extend from the other of the two output terminals VOUT and are connected to the input terminals VIN of the adjacent camera operating devices.

Then, an image is taken from one of the camera operating devices 1-1 to 1-5, for example, from the camera operating device 1-1 by the camera device 2-1 connected to the camera operating device 1-1. It is assumed that an instruction to monitor an image based on a video signal of a subject is issued. In this instruction, identification information of each of the camera operators 1-2 to 1-5 is set as a destination, and identification information of the camera device 2-1 (for example,
# 1) is set, and is written from the CPU 21 of the operation device 1-1 to the bidirectional RAM 22. This bidirectional RAM 22
Are read out by the communication processing unit 23 and transmitted to the bus 5 according to the above-described protocol.

Each camera controller 1-2 connected to the bus 5
CPUs 1 to 5 receive the above-mentioned instruction via the communication processing unit 23 and the bidirectional RAM 22, detect that the destination includes the identification information of the own apparatus, and perform the video related to the content of the instruction. Camera device 2 as signal source
-1 is detected, and whether it matches the identification information of the camera device connected to the own device is detected. Since the identification information does not match in each of the camera operating units 1-2 to 1-5, the camera devices 2-2 to 2-
5 is detected with respect to the identification information No. 5 (for example, # 2 to # 5, respectively). Here, any of the camera operating units 1-2 to
Also in 1-5, since it becomes large, it is connected to the camera operating device on the upstream side (the smaller number is called the upstream side and the higher number is called the downstream side) among the adjacent camera operating devices. Input terminal VIN and an input terminal VOU connected to the downstream camera operating device of the adjacent camera operating devices.
The switching control of the selector 71 is performed so that the connection with T is established. The CPU 21 of the camera operating device 1-1
The switching control of the selector 71 is performed so that the line 72 reaching the video separation control transmitting unit 12 and the output terminal are connected so that a video signal of the camera device 2-1 connected to the own device is obtained.

As a result, as shown in FIG. 10, the video signal obtained by the camera device 2-1 is represented by line 8
The camera operating device 1-1 reaches the camera operating device 1-1 via the line 1-1, and the camera operating device 1-1 via the lines 83-1 to 83-5.
To the monitors 4-1 to 4-5 to output the same image.

Next, an image is taken from one of the camera controllers 1-1 to 1-5, for example, the camera controller 1-3, by the camera device 2-5 connected to the camera controller 1-5. It is assumed that an instruction to monitor an image based on a video signal of the subject has been issued. In this instruction, identification information of each of the camera operating units 1-1, 1-2, 1-4, and 1-5 is set as a destination, and identification information of the camera device 2-5 (for example, # 5) is set, and the camera operating device 1-
No. 3 is written to the bidirectional RAM 22 from the CPU 21.
The instruction written in the bidirectional RAM 22 is read by the communication processing unit 23 and sent to the bus 5 according to the above-described protocol.

Each camera operating device 1 connected to the bus 5
The CPUs 21 of 1, 1-2, 1-4, and 1-5 receive the above instruction via the respective communication processing units 23 and the bidirectional RAM 22, and detect that the identification information of the own device is included in the destination. Then, the identification information of the camera device 2-3 is detected as the source of the video signal according to the instruction content, and it is detected whether the identification information matches the identification information of the camera device connected to the own device.

The camera operating units 1-1, 1-2, and 1-4 do not match the identification information (# 5) of the video signal source, but the camera operating units 1-5 do. For the camera operating devices (including 1-3) that do not match, the magnitude of the identification information (for example, # 1 to # 4 respectively) of the camera devices 2-1 to 2-4 connected to the own device is determined. To detect. Here, since the size of each of the camera operating units 1-2 to 1-4 is small, an input terminal VIN connected to the downstream camera operating unit of the adjacent camera operating units,
The switching control of the selector 71 is performed such that the selector 71 is connected to the input terminal VOUT connected to the camera operating device on the upstream side of the adjacent camera operating devices.

The CPU 21 of the camera operating unit 1-5 whose identification information as the source of the video signal coincides with the identification information of the camera device connected to the own device is connected to the camera device 2-5 connected to the own device. The switching control of the selector 71 is performed so that the line 72 reaching the video separation control transmitting unit 12 and the output terminal are connected so that the video signal of the above is obtained.

As a result, as shown in FIG. 11, the video signal obtained by the camera device 2-5 is output on line 8
The camera controller 1-5 is reached via a line 1-5, from which each camera controller 1-4 is connected via a line 82-4 to 82-1.
To 1-1, and sent to the monitors 4-1 to 4-5 of the lines 83-1 to 83-5 connected to the output terminals VOUT of the respective camera operating devices 1-1 to 1-5. The image is displayed.

Thus, it is possible to simultaneously view an image based on the video signal of any camera device by an instruction from any of the cascade-connected camera operating devices. FIGS. 10 and 11 show an example in which one camera device is connected to each camera operating device. However, as shown in FIGS. 1 and 6, each camera operating device has a plurality of camera devices. Is connected, an image based on a video signal of any camera device can be simultaneously viewed by an instruction from any of the camera operating devices.

[0047]

As described above, according to the camera monitoring system of the first aspect, transmission and reception of control information between the control section of the camera operating device and the control section of the camera device are performed via the bus. Therefore, the restriction on the amount of control information is relaxed, and quick and appropriate control between the camera operating device and the camera device is enabled.

As described above, according to the camera monitoring system of the second aspect, the bus is provided in the camera operating device, and the bus is provided with an extended interface for interconnecting with the bus of the adjacent camera operating device. Therefore, adjacent camera operating devices can be interconnected by a bus, and a camera device connected to a camera operating device other than the camera operating device can be controlled.

As described above, according to the camera surveillance system of the third aspect, the control unit of a plurality of camera devices is connected to the bus of one camera operating device. A plurality of camera devices can be controlled.

As described above, according to the camera monitoring system of the fourth aspect, the video signal and the control information are transmitted and received by the signal multiplexed between the camera device and the camera operating device. Can be transmitted and received in both directions, and appropriate control and confirmation can be performed.

As described above, according to the camera monitoring system of the fifth aspect, the potential difference between the resistor provided between the transmission source and the transmission line is detected, and the voltage on the transmission line side is transmitted. A differential amplifier that outputs a signal when the voltage is higher than the voltage on the source side is provided, so that an output from the differential amplifier is obtained only for a signal arriving from the transmission line side, and is separated from the signal to the transmission line side. can do.

As described above, according to the camera monitoring system of the sixth aspect, the first system connected to the camera device
And a video signal coming from a second input terminal for receiving a video signal from an adjacent camera operating device is selected and output to the monitor. An image based on a video signal from a camera device connected to one camera operating device or a video signal from another camera operating device can be viewed.

As described above, according to the camera monitoring system of the seventh aspect, the camera operating device is connected to both ends, and the video signal from the camera device connected to the own camera operating device or other Can be viewed based on the video signal from either of the two camera controllers.

As described above, according to the camera monitoring system of the eighth aspect, an extended interface for interconnecting with a bus of an adjacent camera operating device is provided, and a plurality of camera devices are provided by the extended interface. Are connected to each other, it is possible to control a plurality of camera devices from any camera operating device and to provide control information to a control unit of another camera operating device. .

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a bus connection of a camera monitoring system according to the present invention.

FIG. 2 is a detailed configuration diagram of a camera operating device in the camera monitoring system according to the present invention.

FIG. 3 is a detailed configuration diagram of a portion related to demultiplexing in a camera device and a camera operating device of the camera monitoring system according to the present invention.

FIG. 4 is a detailed configuration diagram of a portion related to transmission / reception signal separation in the camera device and the camera operating device of the camera monitoring system according to the present invention.

FIG. 5 is a block diagram showing an example of a camera device of the camera monitoring system according to the present invention.

FIG. 6 is a diagram showing a connection configuration between a plurality of camera devices and a plurality of camera operating devices in the camera monitoring system according to the present invention.

FIG. 7 is a diagram showing a second example of a connection configuration between a plurality of camera devices and a plurality of camera operating devices in the camera monitoring system according to the present invention.

FIG. 8 is a diagram showing a third example of a connection configuration between a plurality of camera devices and a plurality of camera operating devices in the camera monitoring system according to the present invention.

FIG. 9 is a configuration diagram of a selector used for a camera operating device in the camera monitoring system according to the present invention.

FIG. 10 is a diagram showing a transmission path of a video signal between a plurality of camera devices and monitors of a plurality of camera operating devices in the camera monitoring system according to the present invention.

FIG. 11 is a diagram showing a transmission path of a video signal between a plurality of camera devices and a plurality of monitors of the camera operating device in the camera monitoring system according to the present invention.

FIG. 12 is a configuration diagram of a conventional camera monitoring system.

FIG. 13 is a diagram for explaining conventional multiplexing of a video signal and a control information signal.

FIG. 14 is a diagram showing a transmission path of a video signal between a plurality of camera devices and a plurality of camera operating devices in a conventional camera monitoring system.

[Explanation of symbols]

1-1 to 1-n Camera controller 2-11 to 2-
n4 Camera device 3-1 to 3-n Operation console 4-1 to 4-n
Monitor 5, 5-1 to 5-n Bus 6-1 to 6-n
4 Buffer 10, 10-1 to 10-n Controller 11, 71 Selector 12-1 to 12-4 Video Separation Control Transmitter 13-1 to 13-4 AM Modulator / Demodulator 14-1, 14
-2 buffer 20-11 to 20-n4 control device 21, 61C
PU 22, 69 Bidirectional RAM 23, 68 Communication processing unit 25, 62 I / O port 26 Interface 27 Numeric keypad 28 Panel switch 29 Display unit 30 External operation interface 31 Coaxial cable 32, 42 Transmission / reception separation unit

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Takashi Kawazu Inventor of Toshiba Hino Plant, 3-1-1 Asahigaoka, Hino-shi, Tokyo

Claims (8)

[Claims] 1. A camera monitoring system comprising: a camera device for capturing an image of a subject; and a camera operation device for controlling the camera device, wherein a control unit of the camera operation device and a control unit of the camera device A camera monitoring system, wherein control information is transmitted and received between buses via a bus. 2. The system according to claim 1, wherein the bus is provided in the camera operating device, and an extension interface for interconnecting with a bus of an adjacent camera operating device is provided.
A camera surveillance system according to item 1. 3. The camera monitoring system according to claim 2, wherein a control unit of a plurality of camera devices is connected to a bus of one camera operation device. 4. A camera surveillance system comprising a camera device for imaging a subject and a camera operating device for controlling the camera device, wherein the camera device stores a video signal obtained by imaging and control information. A bidirectional multiplexing unit is provided for multiplexing and separating control information coming from the camera operating device side, while the camera operating device controls a multiplexed signal coming from the camera device as a video signal. A camera surveillance system comprising: a video separation control transmission unit that separates information into information and sends control information to the camera operation device side. 5. A bidirectional multiplexing unit and a video separation control transmitting unit, wherein: a resistor provided between a transmission source and a transmission line; a potential difference between the resistors is detected; 5. The camera monitoring system according to claim 4, further comprising: a differential amplifier that outputs a signal when the voltage is higher than the voltage on the transmission side. 6. A camera monitoring system comprising a camera device for imaging a subject and a camera operating device for controlling the camera device, wherein an output terminal connected to a monitor, and an output terminal connected to the camera device A first input terminal; and a second input terminal for receiving a video signal from an adjacent camera operating device, wherein one of the video signals coming from the first and second input terminals is selected and the output is selected. A camera surveillance system comprising a selector for outputting to a terminal. 7. The selector includes a third input terminal for receiving a video signal from another adjacent camera operating device, and includes one of the video signals arriving from the first, second, and third input terminals. 7. The camera surveillance system according to claim 6, wherein one is selected and output to the output terminal. 8. A camera monitoring system comprising: a camera device for capturing an image of a subject; and a camera operating device for controlling the camera device, wherein the camera operating device includes a control unit for controlling a control unit of the camera operating unit. A bus for transmitting and receiving information and control information of the control unit of the camera device; and an extended interface for interconnecting with a bus of an adjacent camera operating device. The extended interface is connected to a plurality of camera devices. A camera surveillance system, wherein a plurality of buses are interconnected.