JPH11168712A - Radio image monitor system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio image monitor system that applies image monitor and monitor control of installation in a tunnel or at a remote place by means of radio relay. SOLUTION: This system has a controller 6 that controls the facilities, including a camera 5 photographing a monitored image and a sensor 7 or the like and is provided with a transmission terminal 1 that sends image monitor data, a relay terminal 2-N that relays radio signal, and a central monitor 4 that conducts monitor control through the transmission reception by the transmission terminal 1 and the relay terminal 2-N via a communication interface 3. Thus, monitor data and monitor image data of the installation in a tunnel or at a remote place are sent to the central monitor 4 by a radio wave without the need for wiring, the central monitor 4 monitors and the image of the installation and the central monitor 4 sends a radio wave control signal to control the facilities in a tunnel or at a remote place.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless image monitoring system for monitoring a tunnel or various facilities or monitoring an image from a remote place.

[0002]

2. Description of the Related Art A conventional wireless image monitoring system includes:
This will be described with reference to FIG. 12, an image signal is input from a camera 50, converted into digital data by an image input unit 51, and further converted into an image compression data format by an image compression unit 52.

A measurement signal from the measuring device 53 or the sensor 54 is converted into digital data by a measurement input means 55, multiplexed with the compressed image data by a multiplexing means 56, and controlled by a communication control means 57. Is transmitted to the receiving side via the antenna 59 by the wireless transmission means 58.

In a receiving device 61, wireless data is received from a transmitting terminal 60 by a wireless receiving means 63 via an antenna 62, and the obtained data is demultiplexed by a multiplexing data separating section 65 to obtain image data and measurement data. The image data is reproduced into a video signal by the image decompression unit 66 and the video reproduction unit 67, and is displayed on the monitor 68. In addition, the measurement data is data for which a measurement value is displayed by the data display unit 69.

[0005]

However, in such a conventional wireless image monitoring system, (1) since the transmission method from the transmitting terminal 60 to the receiving device 61 is unidirectional, for example, the position of the camera 50, zooming, etc. Control could not be performed from the receiving device 61 side. (2) Further, when there are a plurality of locations where the cameras 50 are installed, it is necessary to multiplex the image signals and the measurement signals of each transmission terminal 60. (3) When the transmission distance between the transmitting terminal 60 and the receiving device 61 is long or when an obstacle is in the middle, wireless transmission becomes impossible, and relay transmission is required.

The present invention solves the above-mentioned problems, and transmits an image signal and a measurement signal from a transmission side, can transmit a control signal from a reception side, and relays data of the transmission terminal even when there are a plurality of transmission terminals. It is an object of the present invention to provide a wireless image monitoring system which can perform multiplex transmission while being applied to a case where a transmission distance is long or an obstacle is in the middle.

[0007]

In order to achieve the above object, a first system of the present invention receives an image signal from a camera and a measurement signal from a sensor, and inputs a measurement signal from a sensor and the like. A transmission terminal that performs control and wirelessly transmits the image, measurement, and control signals, and a central monitoring device that displays an image signal from the transmission terminal and monitors and controls equipment through a communication interface; It is.

The second system of the present invention inputs an image signal from a camera and a measurement signal from a sensor, controls equipment including the camera and the sensor, and converts the image, measurement, and control signals. A transmission terminal for wirelessly transmitting data, an image signal from a camera, and a measurement signal from a sensor are input, equipment including these is controlled, and the image, measurement, control signal, and transmission data from the transmission terminal are transmitted. And one or more relay terminals for performing relay transmission using different frequencies, and a central monitoring device for displaying image signals from the transmission terminals and the relay terminals and monitoring and controlling equipment through a communication interface. .

In a third system of the present invention, a transmission terminal used in the system includes an image input means for converting an image signal from a camera into digital image data, and an image for compressing image information into digital image compression format. Compression means, measurement input means for converting a signal from the measurement device into measurement information of a digital signal, and control means for controlling the control of equipment including cameras, sensors, and the like by control information from a central monitoring device,
Multiplexing means for multiplexing the image information and measurement information, and wireless transmission and reception means for transmitting the multiplexed data of the image information and measurement information and transmitting and receiving control information from a higher-level communication device via an antenna, Communication control means for controlling communication for transmission and reception, an address switch for setting an address of a transmission terminal, and a CPU for performing arithmetic processing of communication data such as the image, measurement, and control data
And a memory circuit.

In a fourth system of the present invention, a relay terminal used in the system includes an image input means for converting an image signal from a camera into digital image data, and an image for compressing image information in digital image compression format. Compression means, measurement input means for converting a signal from the measurement device into measurement information of a digital signal, control means for controlling the control of equipment including cameras and sensors by control information of a central monitoring device, and the image information First multiplexing means for multiplexing the measurement information, first radio transmitting and receiving means for receiving multiplexed data of image information and measurement information from another transmission terminal and transmitting the control information, and communication control of transmission and reception And a second multiplexing unit for further multiplexing data from the first multiplexing unit and multiplexed data of image information and measurement information from the transmission terminal. And a second wireless transmission / reception unit for transmitting multiplexed data of image information and measurement information by the second multiplexing unit and transmitting / receiving the control information via an antenna, and a second communication control unit for performing communication control of the transmission / reception. Means, an address switch for setting an address of the relay terminal, and a CPU circuit and a memory circuit for performing arithmetic processing of communication data such as the image, measurement and control data.

In a fifth system of the present invention, the central monitoring device used in the system includes a communication interface having a wireless transmission / reception means for performing wireless communication with a transmission terminal via an antenna and a communication control means. A communication data processing unit for processing communication data, and a control input unit for issuing a control command for equipment connected to the transmission terminal;
Control / monitoring information display means for displaying equipment monitoring and control status, and image decompression means for decompressing the image compressed data of the equipment transmitted from the CPU circuit or communication data processing unit for processing the control / monitoring information data Image reproducing means for converting the expanded digital image data into an analog image signal, image display means for displaying an image, data recording means for recording the monitoring control information and image data,
An external line communication means for communicating the control / monitoring information and the image data through an external line is provided.

In a sixth system of the present invention, the transmission terminal used in the system includes a timer circuit and a CPU circuit when reception data cannot be received even after a certain period of time measured by the timer circuit. Has a memory circuit for storing communication monitoring information and a reset means for resetting the CPU circuit, and has a function of shifting to an initial reception state.

[0013] In a seventh system of the present invention, the relay terminals used in the system include timer circuits respectively corresponding to the transmission terminal side and the central monitoring device side, and communication between the transmission terminal side and the central monitoring device side. In the communication, when the received data cannot be received even after the predetermined time measured by the timer circuit has elapsed, the CPU circuit determines that the communication is abnormal, and a memory circuit for storing monitoring information;
It has a reset means for resetting the circuit, and has a function of shifting to an initial reception state.

In an eighth system of the present invention, the transmission terminal is in a reception state in an initial state of the system, and after transmitting a control signal from the central monitoring device, establishing a communication link from the transmission terminal side, and monitoring the upstream monitoring data. In addition, the transmission terminal and the central monitoring device are provided with transmission and reception communication control means for transmitting upstream image data, returning to the reception state after transmission of the transmission data, and transmitting a termination notification signal, respectively, to the transmission terminal and the central monitoring device.

In a ninth system according to the present invention, the initial state of the system is transmission and the relay terminal is in the reception state. After transmitting the downlink control signal from the upper side (central monitoring device), the lower side (transmission and relay). After the communication link is established from the terminal, the uplink monitoring data and the uplink image data are transmitted, and after the transmission data is completed, the transmission of the termination notification signal is performed and then the reception state is set again.
Communication control means for reception is provided in the transmission, relay terminal and central monitoring device, respectively.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a first system of the present invention, an image signal from a camera and a measurement signal from a sensor are wirelessly transmitted from a transmission terminal to a central monitoring device through a communication interface, and perform image monitoring and monitoring of measurement information. Do. In addition, the central control device wirelessly transmits a control command to a transmission terminal through a communication interface to control a control device of equipment including a camera and a sensor connected to the transmission terminal.

In a second system of the present invention, the image signal from the camera and the measurement signal from the sensor are transmitted from the transmission terminal to one or more relay terminals, and the image signal from the camera at the relay terminal and the measurement from the sensor. While multiplexing the signals, the signals are wirelessly transmitted to the central monitoring device via the communication interface, and the data is used by the central monitoring device to monitor the image of the equipment including the cameras and sensors in the transmission terminal and the relay terminal and to monitor the measurement information. In addition, the control command is transmitted from the central monitoring device to the relay terminal via the communication interface by wireless relay transmission, and the control device of the equipment including the transmission terminal and the cameras and sensors connected to the relay terminal is controlled.

In a third system of the present invention, a transmission terminal used in the system converts an image signal from a camera into digital image data by an image input unit, and further converts the image signal in a digital image compression format by an image compression unit. It compresses information, converts signals from measurement devices and sensors into measurement information of digital signals by measurement input means, and controls equipment including cameras and sensors by control information of a central monitoring device. is there.

Next, the image information and the measurement information are multiplexed by the multiplexing means. The multiplexed data of the image information and the measurement information is transmitted, and control information and communication commands from the central monitoring device are transmitted via the communication interface. Sending and receiving
This is performed by a wireless transmission / reception unit and a communication control unit for performing communication control of transmission / reception via an antenna. Further, the address of the transmission terminal is set by an address switch, and the arithmetic processing of communication data such as the image, measurement, control data and the like is performed by a CPU circuit and a memory circuit.

In a fourth system of the present invention, a relay terminal used in the system converts an image signal from a camera into digital image data by an image input unit, and further converts the image signal in a digital image compression format by an image compression unit. Compressed into information, converted from signals from measuring devices and sensors into measurement information of digital signals by measurement input means, and further multiplexed with image information and measurement information by first multiplexing means. The control of the equipment including the sensors and the like is controlled by the control information of the central monitoring device. Then, the multiplexed data of the image information and the measurement information, which is relay-transmitted from the transmission terminal or the relay terminal via the first communication control means for performing the communication control of the transmission and reception with the first wireless transmission / reception means, is temporarily stored by the memory circuit. Is stored in Then, the stored multiplexed data is added to the image information and the measurement information multiplexed by the first multiplexing means, further multiplexed by the second multiplexing means, and controls the second wireless transmission / reception means and transmission / reception communication control. The second communication control means performs wireless transmission to the relay terminal on the upper side. Further, the address of the relay terminal is set by an address switch, and arithmetic processing of communication data including the image, measurement, and control data is performed by a CPU circuit and a memory circuit.

In a fifth system according to the present invention, the central monitoring device used in the system is connected to a transmission terminal or a relay terminal via an antenna via a wireless transmission / reception means and a communication interface for performing wireless communication by communication control means. To communicate image information, measurement information, and control information.

The communication data is processed by the CPU circuit through the communication data processing unit, and the compressed image data is expanded by the image expansion unit, and the expanded digital image data is reproduced as an analog image signal. Means for converting the image and displaying the image by means of the image display means. On the other hand, a control command for equipment including a camera and a sensor is acquired by a control input unit, processed by a CPU circuit, and a control command is transmitted from a communication data processing unit. The state of equipment monitoring and control is displayed by the control / monitoring information display means.

Further, the control / monitoring information and the image data are transmitted to an external network by an external line communication means for communicating via an external line.

According to a sixth system of the present invention, the transmission terminal used in the system measures the communication time by a timer circuit, and when the reception data cannot be received even after a certain period of time, the monitoring information is transmitted to the messaging circuit. Stored by C
This is to reset the PU circuit and shift to the reception state again.

In a seventh system according to the present invention, the relay terminal used in the system includes a first terminal provided by a timer circuit.
The communication time of the communication control means and the second communication control means is measured, and when the reception data cannot be received even after a certain time elapses, the monitoring information is stored in the relay terminal by the memory circuit, the CPU circuit is reset, and This is to shift to the reception state.

In the eighth system of the present invention, the transmission data format used for the system is such that the transmission terminal is in a receiving state in the initial state of the system, and a control signal is transmitted from the central monitoring unit communication interface to the transmission terminal side. Transmitted, the transmitting terminal receives the control signal and establishes a communication link. Next, the transmission terminal transmits the monitoring data and the image data, and after the transmission data is completed, after receiving the completion notification signal to the central monitoring device, the transmission terminal is again in the receiving state.

In a ninth system according to the present invention, the transmission data format used in the system is such that the transmission terminal and the relay terminal are in a receiving state in an initial state of the system,
A control signal is sent from the central monitoring device to the relay terminal, and the relay terminal receives the control signal and establishes a communication link. Next, the relay terminal transmits the monitoring data and the image data, and after the transmission data is completed, the relay terminal returns to the reception state after transmitting the completion notification signal to the central monitoring device.

In the same manner, the communication is repeated between the plurality of relay terminals up to the transmission terminal in the transmission data format.

An embodiment of the present invention will be described below with reference to FIGS. (First Embodiment) First, a first system according to a first embodiment of the present invention will be described with reference to FIG.

The first system comprises a transmission terminal 1, a central monitoring device 4, and a central monitoring device 4 having a communication interface 3 for wirelessly transmitting and receiving between the transmission terminal 1 and the central monitoring device 4. is there. This first system transmits an image signal from the camera 5 to the transmission terminal 1,
The measurement signal is input from the measurement unit 9 and converted into a digital form, and transmitted to the central monitoring device 4 via the communication interface 3 via the antenna 8 to display image data. The measurement data is processed by the central monitoring device 4 to monitor the state of the equipment including the cameras and sensors.

When control is performed from the central monitoring device 4, a control command of the control device 6 is transmitted to the transmission terminal 1 to control each facility.

Second Embodiment Next, a second system according to a second embodiment of the present invention will be described with reference to FIG.

The configuration of the second system includes a transmission terminal 1, N relay terminals 2, a central monitoring device 4, and a central monitoring device having a communication interface 3 for performing wireless transmission and reception with the relay terminal 2. is there. In the second system,
An image signal from the camera 5 and a measurement signal from the sensor 7 and the measuring device 9 are input to the transmission terminal 1 and converted into digital form, respectively, and the relay terminal 2-N (N =
1, 2, 3,...). Relay terminal 2-N
As in the transmission terminal 1, an image signal is input from the camera 5 and a measurement signal is input from the sensor 7 and the measuring device 9 in the same manner as in the transmission terminal 1, and is converted into a digital format. Further, the data transmitted from the transmission terminal 1 is multiplexed with the data from the relay terminal 2-1 and transmitted to the next relay terminal 2-2. Similarly, the N multiplexed data from the relay terminal 2-N is transmitted to the communication interface 3 and the central monitoring device 4 displays the image data. The measurement data is processed in the central monitoring device 4 to monitor the state of the equipment.

When the equipment including the camera and the sensor is controlled from the central monitoring device 4, the control command of the control device 6 is transmitted to the transmission terminal 1 and the relay terminal 2 to perform the control. Further, the image data is decompressed by the central monitoring device 4 into data before compression, and the image is displayed by the video display means. The measurement data is input to the control / monitoring information means of the central monitoring device 4 to monitor the state of the equipment.

When control is performed from the central monitoring device 4, a control signal is added to the downlink control data, a control command of the control device 6 is transmitted to the N relay terminals, and each facility is controlled.

In the image data, the image shooting time, the image frame number, the type of the image, and the compression format are described as the image management information, so that the database of the image data, the image quality of the monitoring screen, the moving image and the still image can be stored. Can manage types. The selection of the image data can be designated by the downlink control data from the central monitoring device 4.

Third Embodiment Next, a third system according to a third embodiment of the present invention will be described with reference to FIG. In the third system, in the transmission terminal 1, when an image signal input from the camera 5 is an analog video signal, the image signal is converted into a digital format by the image input unit 10. Further, the image data in digital format is converted into a compression format by the image compression means 11. In addition, the sensor 7 and the measuring device 7
Is converted into digital data by the measurement input means 14 and the image compression data and the multiplexing means 2
5 is multiplexed as shown in FIG.

When connected to the general-purpose control unit 17, the data is input to the CPU circuit 18 as measurement data from the serial communication interface 16 and is similarly multiplexed. In this way, the multiplexed data and communication control command are transmitted / received to / from the central monitoring device 4 via the communication interface 3 by the wireless transmission / reception means 26. On this occasion,
The communication control command is initialized by the CPU circuit 18. Switching between transmission and reception is performed by the second communication control means 24.

Embodiment 4 Next, a fourth system according to Embodiment 4 of the present invention will be described with reference to FIG. In the fourth system, the multiplexed data of the image information and the measurement information from the transmission terminal 1 is obtained by the first wireless transmission / reception unit 12 via the antenna 8.
When transmitting and receiving data to and from the transmission terminal 1, the first
Switching between transmission and reception is performed by the communication control means 13,
The CPU circuit 18 receives a communication control command for transmitting and receiving transmission data and reception data, and notifies the CPU circuit 18 when the communication control command is received. The multiplexed data from the transmission terminal 1 is temporarily stored in the memory circuit 21.

The image signal input from the camera 5 is converted into a digital format by the image input means 10 in the case of an analog video signal. Further, the image data in digital format is converted into a compression format by the image compression means 11.
The measurement signals from the sensor 7 and the measuring device 9 are converted into digital data by the measurement input means 14 and multiplexed with the compressed image data by the first multiplexing means 19 as shown in FIG.

When connected to the general-purpose control device 17, the measurement data is input to the CPU circuit 18 from the serial communication interface 16 and multiplexed similarly.
The multiplexed data is further multiplexed by the second multiplexing means 20 at the position of the frame number corresponding to the address switch 22 (FIG. 8). 8, the control data is data transmitted from the central monitoring device via the interface 3, and includes control information of the control device 6 and terminal setting data of the transmission terminal 1 and the relay terminal 2. The image and monitoring information of the transmission terminal 1 are arranged in a frame of the first multiplexed data, and the relay terminal 2-1 is arranged in a frame of the second multiplexed data. Similarly, if there are N relay terminals, N + 1
Frames of the second multiplexed data are configured. Then, the second multiplexed data of the relay terminal 2 is
-N and the second wireless transmission / reception means 23 perform transmission / reception.
At this time, the communication control command is initialized by the CPU circuit 18. Switching between transmission and reception with the upper-level relay terminal 2-N is performed by the second communication control unit 24. At this time, since the lower first radio transmission / reception means 12 and the upper second radio transmission / reception means 23 use different frequencies, it is not necessary for the communication control means to synchronize with each other. Similar effects can be obtained even if the different frequencies are repeatedly reused with a certain synchronization. For example, three frequencies f1, f
2, f3 is used between the relay terminals 2-1, 2-2, 2-3,
Further, three frequencies f1, f2, and f3 are transmitted to the relay terminals 2-4 and 2-4.
It is reused between -5 and 2-6.

Embodiment 5 Next, a fifth system according to Embodiment 5 of the present invention will be described with reference to FIG. In the fifth system, the monitoring data and the image data are received from the N-th relay terminal 2-N after the wireless transmission / reception unit 26 controls the transmission / reception communication via the communication control unit 27, and the communication data processing unit 35 Is entered. In the communication data processing section 35, the image data and the monitoring data are demultiplexed, the monitoring data is displayed by the control / monitoring information display means 38 by the CPU circuit 37, and the image data is sent to the image decompression means 40.

The image data is subjected to image data expansion processing by the image expansion means 40, converted into a video signal by the image reproduction means 41, and multiplexed by the image display means 42 from the transmission terminal 1 and the relay terminal 2. The monitoring image is displayed on one screen or a plurality of screens.

A control command to the transmission terminal 1 is input to the CPU circuit 37 by the control input means 36, and a control data packet is generated by the communication data processing unit 35 while being displayed by the control / monitoring information display means 38 in some cases. Then, communication control is performed by the communication control means 27 to transmit control data and receive the monitoring data, and the control data is transmitted by the wireless transmission / reception means 26 to the transmission terminal 1 or the relay terminal 2-.
N, and the equipment is controlled from each terminal.

Sixth Embodiment Next, a sixth system according to a sixth embodiment of the present invention will be described with reference to FIG. The configuration of the sixth system is applied to the wireless image monitoring system of FIG. 1 or FIG.

First, a transmission signal from the communication interface 3 is sent to the CPU circuit 18a via the communication control means 27a.
The received signal is monitored at. When communication ends,
The CPU circuit 18a activates the timer circuit 33 and measures the communication time. If there is no communication response for a certain fixed time or more, the timer circuit 33 outputs a trigger signal to the reset means 31 to reset the CPU circuit 18a. Also, C
The PU circuit 18a determines a data error of the received signal, and when a communication data error occurs a certain number of times or more, the CPU circuit 18a
Reset to a. Then, the CPU circuit 18a stores the current setting data and the storage time data in the memory circuit 21a before being reset. By this CPU reset, the transmission terminal 1a enters an initial state and shifts to a reception state. Therefore, since the received signal is not transmitted to the central monitoring device 4 via the communication interface 3 even after a certain period of time, it is determined that the system is abnormal, and the central monitoring device 4 starts up the system from the initial state and returns the system. Further, at the time of recovery, the operation status of the transmission terminal 1a can be confirmed from the data and the storage time at which the control signal is stored before resetting in the transmission terminal 1a.

Embodiment 7 Next, Embodiment 7 of the present invention will be described with reference to FIG. In FIG.
The CPU circuit 18b monitors the reception state of the communication via the first communication control means 13a, and when the communication ends, activates the first timer circuit 30 to measure the communication time. Also,
The second timer circuit 32 also measures time similarly by the second communication control means 24a.

First, in the first communication control means 13a,
If the received signal from the lower terminal does not respond for a certain period of time or more, the first timer circuit 30 outputs a trigger signal to the reset means 31 to reset the CPU circuit 18b. When transmission data is not transmitted from the relay terminal 2-N on the upper side in the second communication control unit 24a for a certain period of time, the second timer circuit 32 outputs a trigger signal to the reset unit 31 to reset the CPU circuit 18. Do. Further, the CPU circuit 18b determines a data error of the signal received from the first or second communication control means, and resets the CPU circuit 18b when a communication data error occurs more than a certain number of times. Note that the CPU circuit 18b stores the current setting data and the storage time data in the memory circuit 21 before the reset. By this CPU reset, the relay terminal 2a enters an initial state and shifts to a reception state. Therefore, since transmission is not performed to the upper terminal side, the upper terminal side also shifts to the reception state by the same operation as described above, and finally the reception signal is passed by the central monitoring device 4 via the communication interface 3 for a predetermined time. Is not transmitted, it is determined that the system is abnormal, and the central monitoring device 4 starts up the system from the initial state and returns the system. In addition, when returning, control signals are sequentially transmitted to the transmission terminal, and if there is no transmission response, it can be determined that the transmission terminal is abnormal. Alternatively, when the terminal has already returned from the abnormal state, the operation status of each terminal can be confirmed from the data and the storage time stored before the reset.

(Eighth Embodiment) Next, communication control of an eighth system according to an eighth embodiment of the present invention will be described. In FIG. 11, the upper side is the central monitoring device, and the lower side is the transmission terminal 1 or the relay terminal 2-N. First, in the initial state, each relay terminal 2-N and the transmission terminal 1 are set to the reception state.

Then, a control command and a request for status monitoring are sent from the central monitoring device 4 to the relay terminal 2-N as downlink control data from the central monitoring device 4 via the communication interface 3 from the upper central monitoring device 4. (Communication start signal a). The lower relay terminal 2-N receives the control data of FIG. 8, shifts to the transmission state, sends a start signal (response signal b), shifts to the reception state, and receives the transmission permission signal from the upper layer (downlink control). The N + 1 second multiplexed upstream monitor data and upstream monitor image data of FIG. 9 are transmitted to the data c) (upstream monitor data d and upstream image data e). If there is a transmission error in the uplink monitoring data, retransmission means may be provided. Further, a means for adding an error correction code to the uplink image data may be provided instead of the retransmission means. After the completion of the monitoring and the transmission of the image data, an end packet is transmitted (end notification signal f), and the communication between the relay monitoring device 4 and the relay terminal 2-N via the communication interface 3 is ended. Similarly, communication is performed between the N-th relay terminal and the (N-1) -th terminal (communication start signal a '), and the transmission data transmits N pieces of first multiplexed data in FIG. 8g. Hereinafter, similarly, the transmission terminal 1 transmits the first multiplexed data to the relay terminal 2-N.

It is assumed that the image data of the first multiplexed data can be omitted by the CPU circuit 18b so that the data can be omitted by a command of the control data, and the necessary image of the transmission terminal 1 or the relay terminal 2-N can be set. Only can be selected.

Therefore, it is possible to select a display equipment location, a screen size, a still image, and a moving image of the monitoring image from the central monitoring device 4.

Embodiment 9 Next, a ninth system according to Embodiment 9 of the present invention will be described with reference to FIG.

The control data (FIG. 8), which is a control command from the central monitoring device 4, takes a data format as shown in FIG. 10 to monitor individual or entire transmission terminals or specific groups. By setting the address and the control content in each case, the number of transmission packets of the terminal setting in the case of the initial setting can be reduced.

In addition, the images of all the transmission terminals are normally monitored by the upstream monitoring image data (FIG. 9), and the response time of the monitoring image transmission can be improved by specifying only a necessary part in an emergency.

Further, when only one terminal is designated as the transmission image data, a system can be constructed in which the resolution of the image can be increased and effective monitoring can be performed.

[0057]

As described above, according to the first system of the present invention, the monitoring data and the monitoring image data of the equipment in the tunnel and at the remote place are transmitted to the central monitoring device wirelessly without wiring, and the central monitoring is performed. The device can monitor equipment and monitor images, and can transmit a control signal wirelessly from the central monitoring device to control equipment in a tunnel or at a remote place.

Further, according to the second system of the present invention, monitoring data and monitoring image data of a plurality of facilities in a tunnel or a remote place and a control command are bidirectionally relayed and transmitted to the central monitoring device. Equipment monitoring and control of each relay point facility can be performed.

According to the third system of the present invention, a monitoring image signal of a facility and a measurement signal are multiplexed and transmitted wirelessly between a transmission terminal and a relay terminal apparatus, and control data is wirelessly received and transmitted. And a transmission terminal capable of wirelessly monitoring and controlling the inside of a tunnel or a remote place can be obtained.

Further, according to the fourth system of the present invention, the monitoring image signal of the facility and the measurement signal from the transmission terminal or another relay terminal are multiplexed, and both are relayed while relaying the control command from the central monitoring device. It is possible to obtain a relay terminal capable of performing wireless relay transmission in the opposite direction and performing wireless monitoring control in a tunnel or a remote place.

Further, according to the fifth system of the present invention, a central monitoring system which performs wireless transmission / reception with a transmission terminal or a relay terminal, can display a monitoring image from a facility in a tunnel or at a remote place, and can monitor and control the facility. A device is obtained.

Further, according to the sixth system of the present invention, when communication is interrupted in the wireless communication between the transmission terminal and the central monitoring device or when a communication error occurs and the monitoring system stops functioning, the system is re-established. The system can be restored and the cause of the failure can be investigated.

Further, according to the seventh system of the present invention, when communication is interrupted or a communication error occurs in communication between the transmission terminal and the relay terminal or between the relay terminals and in wireless communication between the relay terminal and the central monitoring device. However, when the monitoring system stops functioning, the system can be restored again, and the cause of the failure can be investigated.

Further, according to the eighth system of the present invention, the communication between the transmission terminal and the central monitoring device does not need to be synchronized in the uplink and downlink transmission and reception of each terminal, and is highly reliable bidirectional communication. A relay system can be realized.

Further, according to the ninth system of the present invention, the communication between the transmission terminal and the relay terminal or between the relay terminals and the communication between the relay terminal and the central monitoring device are synchronized in the uplink and downlink transmission and reception of each terminal. It is possible to realize a highly reliable two-way communication relay system which does not need to be taken.

[Brief description of the drawings]

FIG. 1 is a schematic system configuration diagram of a wireless image monitoring system according to a first embodiment of the present invention.

FIG. 2 is a schematic system configuration diagram of a wireless image monitoring system according to the second embodiment;

FIG. 3 is a block diagram of a transmission terminal of the wireless image monitoring system according to the third embodiment;

FIG. 4 is a block diagram of a relay terminal of the wireless image monitoring system according to the fourth embodiment.

FIG. 5 is a block configuration diagram of a central monitoring device of the wireless image monitoring system according to the fifth embodiment.

FIG. 6 is a block diagram of a transmission terminal of the wireless image monitoring system according to the sixth embodiment.

FIG. 7 is a block diagram of a relay terminal of the wireless image monitoring system according to the seventh embodiment.

FIG. 8 is a configuration diagram of a transmission data format of the wireless image monitoring system.

FIG. 9 is a configuration diagram of a transmission data format of the wireless image monitoring system.

FIG. 10 is a configuration diagram of a transmission data format of the wireless image monitoring system.

FIG. 11 is an explanatory diagram of a communication control procedure of the wireless image monitoring system.

12A is a system configuration diagram of a transmission terminal of a conventional wireless image monitoring system, and FIG. 12B is a system configuration diagram of the reception device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1a Transmission terminal 2, 2a Relay terminal 3 Communication interface 4 Central monitoring device 5 Camera 6 Control device 7 Sensor 8 Antenna 9 Measurement device 10 Image input means 11 Image compression means 12 First wireless communication means 13, 13a First communication control Means 14 Measurement input means 15 Control means 16 Serial communication interface 17 General-purpose control device 18, 18a, 18b CPU circuit 19 First multiplexing means 20 Second multiplexing means 21, 21a Memory circuit 22 Address switch 23 Second wireless communication means 24 , 24a Second communication control means 25 Multiplexing means 26 Wireless communication means 27, 27a Communication control means 30 First timer circuit 31 Reset means 32 Second timer circuit 33 Timer circuit 35 Communication data processing unit 36 Control input means 37 CPU circuit 38 Control / monitoring information Display unit 39 data recording unit 40 the image decompression unit 41 the image reproduction unit 42 the image displaying unit 43 outside line communication means

Claims (13)

[Claims] 1. An image signal from a camera and a measurement signal from a sensor are input, the equipment including the camera and the sensor is controlled, and the image, measurement, and control signals are wirelessly transmitted. A wireless image monitoring system comprising a terminal and a central monitoring device for displaying an image signal from the transmission terminal through a communication interface and monitoring and controlling equipment. 2. An image signal from a camera and a measurement signal from a sensor are input, the equipment including the camera and the sensor is controlled, and the image, measurement, and control signals are wirelessly transmitted. A terminal, an image signal from a camera and a measurement signal from a sensor are input, and equipment including these cameras and sensors is controlled, and the image, measurement, and control signals and transmission data from the transmission terminal are transmitted at different frequencies. A wireless image monitoring system, comprising: one or more relay terminals that perform relay transmission by using a communication terminal; and a central monitoring device that displays image signals from the transmission terminals and the relay terminals and monitors and controls equipment through a communication interface. 3. A transmission terminal, comprising: an image input unit for converting an image signal from a camera into digital image data; an image compression unit for compressing image information into digital image compression format image information; A measurement input unit that converts the information into information, a control unit that controls the control of the equipment including the camera and the sensor by control information from the central monitoring device,
Multiplexing means for multiplexing the image information and measurement information, wireless transmission and reception means for transmitting the multiplexed data of the image information and measurement information and transmitting and receiving control information from a higher-level communication device via an antenna, Communication control means for controlling communication of the transmission and reception, an address switch for setting an address of a transmission terminal, and a CPU circuit and a memory circuit for performing arithmetic processing of communication data such as the image, measurement and control data. Item 3. The wireless image monitoring system according to item 1 or 2. 4. A relay terminal comprising: an image input unit for converting an image signal from a camera into digital image data; an image compression unit for compressing digital image data into image information in a digital image compression format; Measurement input means for converting the information into information, control means for controlling the control of equipment including cameras, sensors, and the like by control information of a central monitoring device, and first multiplexing means for multiplexing the image information and measurement information; A first wireless transmission / reception unit for receiving multiplexed data of image information and measurement information from a transmission terminal and transmitting the control information, a first communication control unit for performing communication control of the transmission / reception, and the first multiplexing. Second multiplexing means for further multiplexing the data from the means and the multiplexed data of the image information and the measurement information from the transmission terminal, and the image information and the total number by the second multiplexing means. Second wireless transmission / reception means for transmitting multiplexed data of measurement information and receiving the control information; second communication control means for performing communication control of the transmission / reception; an address switch for setting an address of a relay terminal; 3. The wireless image monitoring system according to claim 2, further comprising a CPU circuit and a memory circuit for performing arithmetic processing of communication data such as measurement, control data, and the like. 5. A communication data processing unit for processing communication data via a communication interface having a wireless transmission / reception means for performing wireless communication with a transmission terminal via an antenna and a communication control means with a transmission terminal, Control input means for issuing control commands for equipment including cameras and sensors connected to the transmission terminal, control / monitoring information display means for displaying equipment monitoring and control status, and CPU for performing data processing of control / monitoring information Image decompression means for decompressing the compressed image data of the equipment transmitted from the circuit or the communication data processing unit, image reproduction means for converting the decompressed digital image data into an analog image signal, and an image for displaying an image Display means, data recording means for recording the control / monitoring information and image data, and the control / monitoring information and image data through an external line 3. The wireless image monitoring system according to claim 1, further comprising external line communication means for performing communication. 6. A transmission terminal includes a timer circuit for measuring a communication time, and a CPU circuit that determines that communication is abnormal when the reception data cannot be received even after a predetermined time set in the timer circuit has elapsed. 3. The wireless image monitoring system according to claim 1, further comprising a reset unit that resets the wireless communication system, and having a function of shifting to an initial reception state. 7. The relay terminal includes a timer circuit corresponding to each of the transmission terminal and the central monitoring device, and a timer circuit for receiving data even when a predetermined time has elapsed in communication with the transmission terminal or communication with the central monitoring device. If not,
3. The wireless image monitoring system according to claim 2, further comprising: reset means for resetting the CPU circuit when the CPU circuit determines that communication is abnormal, and having a function of shifting to an initial reception state. 8. An initial state of the system is such that the transmission terminal is in a reception state, after transmitting a downlink control signal from the central monitoring device, establishing a communication link from the transmission terminal side, transmitting uplink monitoring data and uplink image data, 3. The wireless image monitoring system according to claim 1, wherein the transmission terminal and the central monitoring device are respectively provided with transmission and reception communication control means for returning to the reception state after transmitting the termination notification signal after the transmission data ends. 9. In an initial state of the system, the transmission and relay terminals are in a reception state, after transmitting a downlink control signal from an upper side (central monitoring device), after establishing a communication link from a lower side (transmission or relay) terminal, and after an uplink. 3. A transmission terminal, a relay terminal, and a central monitoring device, each of which includes transmission and reception communication control means for transmitting monitoring data and uplink image data, and after transmitting data, transmitting an end notification signal and returning to a receiving state after transmission. The wireless image monitoring system according to claim 1. 10. The wireless image monitoring system according to claim 1, wherein image management information is added to upstream image data of the transmission terminal to describe an image capturing time, an image frame number, an image type, and a compression format. . 11. An image management information is added to the upstream monitoring image data of the relay terminal, and an image shooting time, an image frame number,
3. The wireless image monitoring system according to claim 2, wherein a type and a compression format of the image are described. 12. The wireless image monitoring system according to claim 2, wherein different frequencies for performing the relay transmission of the relay terminal are repeatedly reused at a constant cycle. 13. The wireless image monitoring system according to claim 2, wherein the downlink control data enables individual control of relay terminals, simultaneous control of all terminals, or group control of specific group terminals.