JPH09205641A - Remote supervisory equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow the monitor side to confirm an image being an object of supervision before the occurrence of a fault. SOLUTION: A video signal resulting from picking up an image of a supervision object outputted from a video camera 104 of a supervisory object side equipment 100 is fed to a camera connection terminal T4 of a transmitter- receiver 101, the data are compressed and fed to a delay circuit, in which delay processing is conducted. When a sensor 106 of the supervisory object side equipment 100 detects a fault, the transmitter-receiver 101 makes a call to automatically connect a line to a transmitter-receiver 201 of a supervisory side equipment 200. In this case, the transmitter-receiver 101 uses the delay circuit to selectively extract compressed video data subject to delay processing and starts transmission to the line. The transmitter-receiver of the supervisory side equipment 200 applies data expansion processing to compressed video data sent from an ISDN line network 300 to obtain a video signal at the monitor connection terminal T13. Thus, an image of a supervision object before the occurrence of a fault is displayed on a television monitor 204 of the supervisory side equipment 200.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote monitoring device. Specifically, when an abnormality is detected by the sensor, by connecting a line with the monitoring side and sending compressed video data subjected to delay processing to the line,
The present invention relates to a remote monitoring device that allows a monitoring side to confirm an image of a monitoring target before an abnormality occurs.

[0002]

2. Description of the Related Art Conventionally, there has been proposed a remote monitoring device capable of monitoring a monitoring target such as a power generation facility in the mountains from a remote location. For example, a sensor for detecting abnormality is arranged corresponding to the monitored object, and when this sensor detects abnormality, the abnormality detection signal is transmitted to the receiving side through the line.

[0003]

As described above, in the case where only the abnormality detection signal of the sensor is transmitted to the receiving side, the abnormal state of the monitoring target cannot be visually confirmed.
Even if the sensor abnormality detection signal was erroneously output, it was necessary to go to the site and confirm the abnormality of the monitoring target.

Therefore, in order to visually confirm the abnormality of the monitoring target on the monitoring side, a video camera for photographing the monitoring target is provided, and when the abnormality is detected by the sensor, the video signal captured by the video camera is monitored. It is possible to send it to the monitoring side through a line.

In this case, since the video signal output from the video camera is transmitted to the monitoring side after the abnormality is detected by the sensor, the monitoring side can confirm only the image of the monitoring target after the abnormality has occurred. However, if the monitoring side can also confirm the image of the monitoring target before or at the time of occurrence of an abnormality, it will be very effective for elucidating the cause of the abnormality.

Therefore, the present invention provides a remote monitoring device that allows the monitoring side to confirm the image of the monitoring target before the occurrence of an abnormality.

[0007]

SUMMARY OF THE INVENTION A remote monitoring apparatus according to the present invention relates to a video camera, an abnormality detecting sensor provided corresponding to the video camera, and a video signal output from the video camera. Signal processing means for performing data compression processing, line connection means for connecting a line to the monitoring side based on line connection data, and signal sending means for sending the compressed video data output from the signal processing means to the line, A delay means inserted between the signal processing means and the signal sending means, and a control means for controlling the line connection means to connect the line to the monitoring side when an abnormality is detected by the sensor Is.

Here, there is provided signal extraction means for selectively extracting the compressed video data output from the delay means and the compressed video data output from the signal processing means, and the signal transmission means compresses the signal extraction means. The video data may be sent to the line. For example, when an anomaly is detected by the sensor, the compressed video data output from the delay means is extracted from the signal extraction means. Further, for example, the signal extracting means is controlled based on the control data transmitted from the monitoring side.

The video camera is arranged to capture an image of the monitored object. The video signal output from this video camera is subjected to data compression processing by the signal processing means and then supplied to the delay means for delay processing. Moreover, the sensor for abnormality detection is arranged so as to detect the abnormality of the monitoring target. When this sensor detects an abnormality, the line connection means makes a call operation based on the line connection data, for example, telephone number data, connects the line to the monitoring side, and compresses the delay processing by the delay means. Video data is transmitted to the monitoring side through the line. As a result, the video signal obtained by imaging the monitoring target before the occurrence of the abnormality is supplied to the monitoring side, and the image of the monitoring target before the occurrence of the abnormality is displayed on, for example, the television monitor.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the configuration of a remote monitoring device 10 as an embodiment. The remote monitoring device 10 includes a monitoring target device 100 provided on the monitoring target side and a monitoring device 200 provided on the monitoring side.
And The monitoring target device 100 and the monitoring device 200 are ISDN (integrated service dig).
ital network) is connected via a network 300.

The monitoring target device 100 is a monitoring device 20.
A transceiver 101 for transmitting and receiving data to and from 0
have. The transceiver 101 connects a line connection terminal T1 for connecting to the ISDN line network 300, a microphone connection terminal T2 for connecting a microphone, a speaker connection terminal T3 for connecting a speaker, and a video camera. A camera connection terminal T4 for connecting the monitor, and monitor connection terminals T12 and T13 for connecting a television monitor,
Sensor connection terminal T1 for connecting an abnormality detection sensor such as a temperature sensor, gas sensor, optical sensor, or vibration sensor
4 and 18-bit parallel input / output terminals T22 to T39
And a computer connection terminal T40 for connecting a computer.

The monitoring target side device 100 also captures an image of the monitoring target, a microphone 102 for capturing the monitoring target side voice, a speaker 103 for reproducing a voice based on a voice signal transmitted from the monitoring side. And a sensor 106 for detecting an abnormality of the monitoring target.

The microphone 102 is connected to the microphone connection terminal T2 of the transceiver 101, the speaker 103 is connected to the speaker connection terminal T3 of the transceiver 101, the video camera 104 is connected to the camera connection terminal T4 of the transceiver 101, and the sensor 106 is connected to the sensor connection terminal T14 of the transceiver 101. Here, the output signal of the sensor 106 is, for example, always at a low level “L” and at a high level “H” when an abnormality is detected.

Further, the monitored device 100 has a camera control unit 10 for controlling the image pickup state (zoom, pan, tilt, focus, iris, etc.) of the video camera 104.
7 and a general-purpose device control unit 108 for controlling opening / closing of the door, turning on / off the lamp, and the like. Although not described above, the parallel input / output terminals T22 to T39 of the transceiver 101 are set to be used as output terminals. The signals output to the parallel input / output terminals T22 to T39 are supplied to the camera control unit 107 and the general equipment control unit 108 as operation control signals.

The monitored device 100 has a computer 109. This computer 109
It is connected to the computer connection terminal T40 of the transceiver 101, for example, by the RS-232C interface standard.
By connecting the computer 109 in this manner, it becomes possible to operate the transceiver 101 using the computer 109 instead of manually operating the transceiver 101 from the key operation unit.

Further, the monitoring side device 200 has a transceiver 201 for transmitting / receiving data to / from the monitoring target side device 100. This transmitter / receiver 201 is configured similarly to the transmitter / receiver 101 of the monitoring target device 100 described above, and has a line connection terminal T1 for connecting to the ISDN line network 300 and a microphone connection terminal T2 for connecting a microphone. A speaker connection terminal T3 for connecting a speaker, a camera connection terminal T4 for connecting a video camera, monitor connection terminals T12, T13 for connecting a TV monitor, and a sensor for detecting abnormality. Sensor connection terminal T14, 18-bit parallel input / output terminals T22 to T39, and a computer connection terminal T40 for connecting a computer.

The monitoring-side device 200 also includes a microphone 202 for capturing the monitoring-side sound, a speaker 203 for reproducing a sound according to a sound signal transmitted from the monitoring-target side, and a speaker 203 transmitted from the monitoring-target side. TV monitor 20 for monitoring the image by the incoming video signal
And 4. The microphone 202 is the transceiver 20
1 is connected to the microphone connection terminal T2, the speaker 203 is connected to the speaker connection terminal T3 of the transceiver 201, and the television monitor 204 is connected to the monitor connection terminal T of the transceiver 201.
13 is connected.

Further, the monitoring side device 200 has a switch circuit 20 for controlling the operations of the camera control section 107 and the general equipment control section 108 of the monitoring target side apparatus 100 described above.
It has 5 _{-1 to} 205 _-18 . Although not described above, the parallel input / output terminals T22 to T39 of the transceiver 201 are set to be used as input terminals. Switch circuit 2
05 _{-1 to} 205 _-18 are connected to the parallel input / output terminals T22 to T39 of the transceiver 201, respectively. here,
Each of the switch circuits 205 _-1 to 205 _-18 corresponds to each item of control by the camera control unit 107 and the general-purpose device control unit 108, outputs, for example signal of high level "H" in response to a user on operation It is configured to do.

For example, the switch circuits 201 _{-1 to} 205
_-10 corresponds to a control item of the camera control unit 107.
That is, the switch circuit 205 _-1, 205 _-2 corresponding to each positive, negative zoom adjustment, the switch circuit 205 _-3,
205 _-4 corresponds to left and right pan adjustments respectively, switch circuits 205 _-5 and 205 _-6 correspond to upward and downward tilt adjustments respectively, and switch circuits 205 _-7 and 205 _-8 respectively correspond to positive and negative. Switch circuit 20
5 _-9 and 205 _-10 correspond to positive and negative iris adjustments, respectively.

The monitoring side device 200 also has a computer 206. The computer 206 is connected to the computer connection terminal T40 of the transceiver 201 by, for example, R
It is connected by the S-232C interface standard. By connecting the computer 206 in this way, instead of manually operating the transceiver 201 from the key operation unit,
It becomes possible to operate using the computer 206.

Next, referring to FIG. 2, the monitoring target side device 1
The configuration of the transmitter / receiver 101 of 00 will be described.

The transceiver 101 is a CPU (Central Processing Unit) 301 for controlling the entire system.
And a flash memory 302 in which an operation program of the CPU 301, system parameters, etc. are stored,
SRAM (Static Random) that functions as a work memory
An access memory) 303 and a key operation unit 304 for a user to operate the operation of the transceiver 101. The flash memory 302, SRAM 303, and key operation unit 304 are connected to the CPU 301 via a bus 305.

The flash memory 302 also stores setting data indicating whether the parallel input / output terminals T22 to T39 are used as input terminals or output terminals. In the transceiver 101, the parallel input / output terminals T22 to T39 are set to be used as output terminals as described above. Further, the flash memory 302 is connected to the telephone number data of the monitoring side to which the line should be connected when a high level “H” signal is supplied to the sensor connection terminal T14 and the line when the intercom to be described later goes off-hook. The telephone number data of the monitoring side to be connected is also stored.

Parallel input / output terminals T22 to T39
Is used as an input terminal or an output terminal, and the telephone number data of the monitoring side to which the line is to be connected is set by, for example, the key operation unit 304 or the transceiver 10.
This can be done by operating the computer connected to the first computer connection terminal T40.

The transceiver 101 also has an ISDN interface section 306 for connecting to the ISDN line network 300 (see FIG. 1). This interface section 3
06 is inserted between the line connection terminal T1 and an image codec described later. The interface unit 306 also performs line connection operations such as call origination under the control of the CPU 301. Therefore, this interface unit 30
6 is connected to the CPU 301 via the bus 305.

Further, the transceiver 101 has an image decoder 312 for obtaining a component video signal (luminance signal, red color difference signal, blue color difference signal) from the composite video signal supplied to the camera connection terminal T4, and this image decoder 312. A / D converter 313 for converting the component video signal output from the digital signal into digital data
And Here, the camera connection terminal T4 is connected to the monitor connection terminal T12. Therefore, by connecting a television monitor to the monitor connection terminal T12, it becomes possible to monitor an image based on the video signal supplied to the camera connection terminal T4.

The transceiver 101 also includes a D / A converter 314 for converting digital video data output from an image codec described later into an analog signal, and a component video output from the D / A converter 314. Image encoder 315 for obtaining a composite video signal from the signal. Here, the output side of the image encoder 315 is connected to the monitor connection terminal T13.

The transceiver 101 also includes an amplifier 316 for amplifying the audio signal supplied to the microphone connection terminal T2, and an A / D conversion for converting the audio signal amplified by the amplifier 316 into digital data. 317, a D / A converter 318 for converting digital audio data output from a voice codec described later into an analog signal, and an amplifier for amplifying the audio signal output from the D / A converter 318. 31
9 and 9. Here, the output side of the amplifier 319 is connected to the speaker connection terminal T3.

The transmitter / receiver 101 includes an A / D converter 3
Data compression processing (encoding processing) is performed on the digital audio data output from 17 to obtain compressed audio data, and data decompression processing (decoding processing) is performed on the compressed audio data separated by the image codec described later. It has an audio codec 321 for obtaining digital audio data. In the voice codec 321, for example, the G.264 standard by CCITT (International Telegraph and Telephone Consultative Committee) is used. Encoding is performed by the encoding method based on the 728 recommendation and data compression is performed.

The transmitter / receiver 101 includes an A / D converter 3
Data compression processing (encoding processing) is performed on the digital video data output from 13 to obtain compressed video data, and the compressed video data and the compressed audio data output from the audio codec 321 and the control supplied from the CPU 301. Data is multiplexed to form transmission data, and compressed video data, compressed audio data, and control data are separated from the transmission data supplied from the ISDN interface unit 306, and data decompression processing (decoding processing) is performed on the compressed video data. It has an image codec 322 for obtaining digital video data.

The image codec 322 uses the H.264 code according to CCITT. The data is compressed by the encoding method based on the H.261 recommendation and the H.264 standard according to CCITT. Video data in a format based on 221 Recommendation,
The compressed audio data and control data are multiplexed. In addition, compressed video data with the image codec 322,
The control data multiplexed with the compressed audio data is the CPU
The image codec 32
The control data separated by 2 is supplied to the CPU 301. Therefore, the image codec 322 is connected to the CPU 301 via the bus 305.

Further, the transceiver 101 transmits the transmission data formed by the image codec 322 for a predetermined time, for example, 10 seconds.
A delay circuit 323 for delaying for about a second, and a changeover switch 311 for selectively taking out the transmission data delayed by the delay circuit 310 or the transmission data output from the image codec 322 and supplying it to the ISDN interface unit 306. And have. In this case, the changeover switch 3 is provided on the output side of the transmission data of the image codec 322.
11 is connected to the fixed terminal on the b side, and the output side of the delay circuit 310 is connected to the fixed terminal on the a side of the changeover switch 311. The delay circuit 310 is, for example, a FIFO (first-in fir).
st-out) configured using memory. Where about 10
The data for a second is about 640 kbits = 80 kbytes when the transmission rate is 64 kbps.

The transceiver 101 has an input / output interface section 323. The sensor connection terminal T14 and the parallel input / output terminals T22 to T39 are connected to the CPU 301 via the interface unit 323 and the bus 305. Further, the changeover switch 311 described above has a C
From PU 301 to bus 305 and interface unit 32
The switching control signal SWC is supplied via 3. In this case, the change-over switch 311 is normally connected to the b side, but is controlled so as to be connected to the a side when a high level “H” signal is supplied to the sensor connection terminal T14, for example.

When a high level "H" signal is supplied to the sensor connection terminal T14, the CPU 301 retrieves the telephone number data of the monitoring side to which the line is to be connected from the flash memory 302 and reads the telephone number data. The ISDN interface unit 306 is controlled so as to perform a call operation by data and connect a line with the monitoring side.

As described above, the parallel input / output terminal T22
About -T39, it is set whether to use as an input terminal or an output terminal. When set to use as an input terminal, parallel input / output terminal T2
18-bit data supplied to 2 to T39 is CPU3
01 to the image codec 322 via the bus 305 as a part of control data. On the other hand, when it is set to be used as the output terminal, the image codec 3
The above-mentioned 18-bit data included in the control data separated by 22 is transmitted from the CPU 301 via the bus 305 and the interface unit 323 to the parallel input / output terminal T22.
~ T39.

The transceiver 101 also has an RS-232C standard input / output interface section 324 for connecting a computer. Computer connection terminal T4
0 is connected to the CPU 301 via the interface unit 324 and the bus 305.

The transmitter / receiver 101 is an intercom 3
25. The input side of the receiver (speaker) of the intercom 325 is connected to the output side of the D / A converter 318, and the output side of the transmitter (microphone) is A / A.
It is connected to the input side of the D converter 317. Here, the hook information IFC indicating whether the intercom 325 is in the on-hook state or the off-hook state is the interface unit 3
23 and the bus 305 to the CPU 301. When the intercom 325 is in the off-hook state, the CPU 301 retrieves and reads the telephone number data of the monitoring side to be connected to the line from the flash memory 302,
The ISDN interface unit 30 is used to make a call operation based on the telephone number data and connect the line to the monitoring side.
6 is controlled.

The transceiver 101 of the monitored device 100 is constructed as described above, but the transceiver 201 of the monitored device 200 is constructed in the same manner as the transceiver 101. However, the parallel input / output terminals T22 to T39 are set to be used as the input terminals as described above.

Next, the operation of the remote monitoring device 10 shown in FIG. 1 will be described.

An abnormality is detected by the sensor 106 of the monitored device 100, and the sensor connection terminal T14 of the transceiver 101 is detected.
Consider a case where a high-level “H” signal is supplied to.
In this case, the CPU 301 of the transceiver 101 (see FIG. 2)
Performs an interrupt operation according to the flowchart shown in FIG.

First, in step ST1, the telephone number data of the monitoring side to be connected to the line when the abnormality is detected by the sensor 106 is retrieved from the flash memory 302 and read out.
Next, in step ST2, the ISDN interface unit 3
Then, 06 is caused to perform a calling operation based on the telephone number data to connect the line with the monitoring side.

Next, at step ST3, the changeover control signal S is sent to the changeover switch 311 via the interface section 323.
WC is supplied, and the changeover switch 311 is controlled to be connected to the a side. As a result, the changeover switch 311
The transmission data delayed by the delay circuit 310 is taken out from and is supplied to the ISDN interface unit 306.

Here, the transmission data is formed by multiplexing the compressed audio data, compressed video data and control data in the image codec 322 as described above. In this case, the audio signal from the microphone 102 supplied to the microphone connection terminal T2 is amplified by the amplifier 316 and then converted into digital audio data by the A / D converter 317, and the audio codec 321 converts this digital audio data. Data compression processing (encoding processing) is performed to form compressed audio data. Also,
The video signal from the video camera 104 supplied to the camera connection terminal T4 is converted into a component video signal by the image decoder 312 and then converted into digital video data by the A / D converter 313, and this digital video data is converted into the image codec 322. Data compression processing (encoding processing) is performed in order to form compressed video data.

Next, in step ST4, the ISDN interface section 306 is controlled to start transmission of transmission data over the line.

Next, in step ST5, it is determined whether or not the line has been disconnected. When the line is disconnected, the ISDN interface unit 30 is operated at step ST6.
6 is controlled to stop transmission of transmission data over the line. Then, in step ST7, the changeover switch 311 is returned to the state of being connected to the b side, and the interruption operation is ended.

Next, as described above, the monitoring target device 10
0-side transmitter / receiver 101 and monitoring side device 200 line-connected
The operation of the transceiver 201 will be described with reference to FIG. 2 (the transmitter 201 is configured similarly to the transmitter 101 as described above).

In this case, the transmitted transmission data is I
It is supplied to the image codec 322 via the SDN interface unit 306, and the compressed video data, compressed audio data, and control data are separated. The compressed audio data separated by the image codec 322 is subjected to data expansion processing (decoding processing) by the audio codec 321 to obtain digital audio data. The digital audio data is supplied to the D / A converter 318 and converted into an analog audio signal, and then the amplifier 3
It is amplified at 19 and led to the speaker connection terminal T3.

The compressed video data separated by the image codec 322 is subjected to data decompression processing (decoding processing) by the image codec 322 to obtain digital video data. This digital video data is D /
After being supplied to the A converter 314 and converted into an analog video signal, it is supplied to the image encoder 315 and converted into a composite video signal. Then, this composite video signal is led to the monitor connection terminal T13.

Since the transceiver 201 of the monitoring side device 200 operates as described above, the speaker 203 (see FIG. 1) connected to the speaker connection terminal T3 of the transceiver 201 transmits from the monitoring target side device 100. The audio signal before the abnormality occurs is output by the incoming audio signal.
Further, on the television monitor 204 (see FIG. 1) connected to the monitor connection terminal T13, the image of the monitoring target before the abnormality occurs is displayed by the video signal transmitted from the monitoring target side device 100.

Further, as described above, the monitoring target device 10
0 is connected to the transmitter / receiver 101 and the transmitter / receiver 201 of the monitoring-side device 200, the transmitter / receiver 201
Of the transmission data formed by the image codec 322 of IS
Sent to the line via the DN interface unit 306,
It is transmitted to the transceiver 101 of the monitored device 100.
Therefore, the audio signal output from the microphone 202 of the monitoring-side apparatus 200 and supplied to the microphone connection terminal T2 of the transceiver 201 is obtained at the speaker connection terminal T3 of the transceiver 101 of the monitoring-side apparatus 100 and is output from the speaker 103. The sound based on the audio signal is output.

Further, as described above, the monitoring target device 10
0 is connected to the transmitter / receiver 101 and the transmitter / receiver 201 of the monitoring-side apparatus 200, the monitoring-side apparatus 20
0 parallel transceiver input / output terminals T22 to T3
The 18-bit data supplied from the switch circuits 205 _{-1 to} 205 _-18 to the transmitter / receiver 9 of the monitoring target side device 100 is a part of the control data constituting the transmission data.
Sent to. Then, each bit data forming the 18-bit data is led to the parallel input / output terminals T22 to T39 of the transceiver 101. Therefore, by operating the switch circuit 205 _-1 to 205 _-18 of the monitoring device 200, the monitored-side device 100 the camera controller 107
Also, the operation of the general equipment controller 108 can be controlled.

The transceiver 1 of the monitored device 100
01 and the transmitter / receiver 201 of the monitoring-side device 200 are connected by calling from the transmitter / receiver 101 of the monitoring-target-side device 100 as described above.
Even if a call is made from the transceiver 201, the connection can be established. In this case, the key operation unit 304 or the computer 206 is operated to input the telephone number data of the monitored side, and the ISDN
The interface unit 306 makes a call (see FIG. 2). The line disconnection can also be performed by operating the key operation unit 304 or the computer 206, not described above.

Here, when the line between the transceiver 101 of the monitored device 100 and the transceiver 201 of the monitored device 200 is called from the transceiver 201 of the monitored device 200 to be connected, Transceiver 1 of side device 100
The 01 changeover switch 311 is connected to the b side. In this case, the transceiver 201 of the monitoring side device 200
The key operation unit 304 or the computer 206 is operated to transmit the switching control data to the transceiver 101 of the monitoring target device 100, and the changeover switch 311 of the transceiver 101 is transmitted.
Can be connected to the a side. Thereby, the monitoring target device 10
0 transmitter / receiver 101 to monitor side device 200 transmitter / receiver 2
The compressed video data sent to 01 is delayed by the delay circuit 31.
The image is subjected to delay processing at 0, and the image of the monitoring target from a predetermined time before, for example, 10 seconds before is displayed on the television monitor 204 of the monitoring device 200.

Next, the transceiver 1 of the monitored device 100
The operation when the intercom 325 of No. 01 is in the off-hook state will be described. In this case, the CPU 301 recognizes that the intercom 325 is in the off-hook state based on the hook information IFC output from the intercom 325, and the intercom 32 from the flash memory 302.
The telephone number data of the monitoring side corresponding to No. 5 is retrieved and read out, and the ISDN interface section 306 is caused to make a call operation by the telephone number data to connect the line with the monitoring side.

Therefore, the audio signal output from the transmitter of the intercom 325 is converted into digital audio data by the A / D converter 317 and then supplied to the audio codec 321 for data compression processing. Then, the compressed audio data output from the audio codec 321 is multiplexed with the compressed video data and control data by the image codec 322, and then sent out from the ISDN interface unit 306 to the line.

Further, the transmitter / receiver 201 of the monitoring side device 200
The image codec unit 3 from the transmission data transmitted from the
The audio codec 321 performs data decompression processing on the compressed audio data separated in 22. Then, the digital audio data output from the audio codec 321 is converted into an analog signal by the D / A converter 318 and supplied to the receiver of the intercom 325.

As a result, by putting the intercom 325 of the transceiver 101 of the monitored device 100 in the off-hook state, it is possible to talk with the monitored device 200 using this intercom 325. in this case,
When the intercom 325 is in the on-hook state, the CPU
The ISDN interface unit 306 is controlled by 301 to disconnect the line.

As described above, in the present embodiment, when an abnormality is detected by the sensor 106 for detecting an abnormality in the monitored device 100, the transceiver 1 of the monitored device 100 is detected.
01 and the transmitter / receiver 201 of the monitoring side device 200 are connected, the changeover switch 311 is connected to the a side, and the transmission data delayed by the delay circuit 310 is sent to the line, and the monitoring side device 200 TV monitors 204
The image of the monitoring target from before the occurrence of the abnormality is displayed on.
Therefore, the monitoring side can also confirm the image of the monitoring target before and at the time of occurrence of the abnormality, which is very effective for elucidating the cause of the abnormality. Further, the delay circuit 310 delays the transmission data (compressed data), which has the advantage of saving the capacity of the FIFO memory forming the delay circuit 310.

Further, the transmitter / receiver 1 of the monitored device 100
01 and the transmitter / receiver 201 of the monitoring side device 200 are connected, the transmitter / receiver 2 of the monitoring side device 200 is connected.
By operating the key operation unit 304 of 01 or the computer 206, the transceiver 10 of the monitored device 100
The transmission data transmitted from 1 to the transmitter / receiver 201 of the monitoring-side device 200 can be delayed by the delay circuit 310. As a result, the image displayed on the television monitor 204 of the monitoring-side device 200 can be returned to a predetermined time before, and there is an advantage that the missed image or the image to be reconfirmed can be easily confirmed.

[0060]

According to the present invention, when an abnormality is detected by the sensor, the line with the monitoring side is connected and the compressed video data subjected to the delay processing is sent to the line. The image of the monitoring target from can be confirmed on the monitoring side, which is very effective for elucidating the cause of the abnormality. Further, since the compressed video data is subjected to delay processing, there is an advantage that the capacity of the FIFO memory or the like which constitutes the delay means can be saved.

Further, the compressed video data subjected to the delay processing based on the control data transmitted from the monitoring side is selectively taken out and transmitted to the line, so that the monitoring target displayed on the monitoring side can be displayed. The image can be returned to a predetermined time before, and it is possible to easily confirm the missed image or the image to be reconfirmed.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a remote monitoring device as an embodiment.

FIG. 2 is a block diagram showing a configuration of a transceiver that constitutes a remote monitoring device.

FIG. 3 is a flowchart for explaining a sensor interrupt operation of a CPU.

[Explanation of symbols]

 10 ... Remote monitoring device, 100 ... Monitoring target equipment
, 101, 201 ... Transceiver, 102, 202 ...
..Microphones, 103, 203 ... Speakers, 1
04 ... video camera, 204 ... TV monitor,
106 ... Sensor for abnormality detection, 107 ... Camera
Control unit, 108 ... General-purpose device control unit, 109, 206
... Computer, 200 ... Monitoring side device, 205
_-1~ 205 _-18... Switch circuit, 300 ... IS
DN line network, 301 ... CPU, 302 ... FLA
Memory, 304 ... Key operation unit, 306 ... I
SDN interface unit, 310 ... Delay circuit, 31
1 ... Changeover switch, 312 ... Image decoder, 3
15 ... image encoder, 321 ... audio codec
322 ... Image codec, 323, 324 ...
・ Input / output interface 325, intercom

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shoko Fujiwara 6-735 Kitashinagawa, Shinagawa-ku, Tokyo Sony Corporation

Claims (4)

[Claims] 1. A video camera, a sensor for detecting abnormality provided corresponding to the video camera, a signal processing means for performing data compression processing on a video signal output from the video camera, and a line connection. Line connection means for connecting a line to the monitoring side based on the data, signal transmission means for transmitting the compressed video data output from the signal processing means to the line, the signal processing means and the signal transmission means And a control means for controlling the line connection means to connect a line to the monitoring side when an abnormality is detected by the sensor. Monitoring equipment. 2. A signal extracting means for selectively extracting the compressed video data output from the delay means and the compressed video data output from the signal processing means, wherein the signal sending means is the signal extracting means. The remote monitoring device according to claim 1, wherein the compressed video data taken out is sent to the line. 3. The remote monitoring apparatus according to claim 2, wherein the compressed video data output from the delay means is extracted from the signal extraction means when an abnormality is detected by the sensor. 4. The remote monitoring device according to claim 2, wherein the signal extracting means is controlled based on control data transmitted from the monitoring side.