JPH11164286A - Cordless monitoring camera system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display monitored data on a monitor by switching radio communica tion to optical communication and transferring the data to a radio communica tion enable slave set when line disconnection is detected in a system which performs communication between a monitor part and monitoring cameras by radio communication. SOLUTION: Cordless monitoring cameras 100, 110, 111 and 112 are arranged so that adjacent cameras cover their visual field. The camera 100 photographs an invader 5 when it can not be connected to a local cordless telephone connecting device 8, it blinks a light emitting part and transmits encoded data to an adjacent camera 110. When the cameras 110 and 111 can not be connected to the local cordless telephone connecting device, the encoded data is sequentially transferred and the connectable camera 112 is connected to a telephone connecting device 9 and transmits the transferred data to a monitoring part 1 by radio communication. The part 1 can observe image and sound information which is acquired by the camera 100 with a monitor 6, enduring intentional noise and interference.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cordless surveillance camera system for wirelessly exchanging signals between a monitor unit and a surveillance camera device.

[0002]

2. Description of the Related Art In a conventional cordless surveillance camera system, each surveillance camera device is provided with a call number in an in-house cordless telephone connection device or a call number in a wireless public line network such as a cellular phone or PHS. Signals are exchanged wirelessly between the monitor unit and the monitoring camera device. This eliminates the need for wiring work for cables for exchanging signals, and facilitates installation. For this reason, the use period at one location is short, and it is suitable for use in changing installation locations, for example, at exhibitions, construction sites, and the like.

[0003]

As described above, in the conventional cordless surveillance camera system, the premises cordless telephone connection device and the wireless public line network transmit and receive voice and data to and from each base station by radio. In addition, a plurality of terminals can be simultaneously connected to one base station by dividing and using one carrier. However, there is a limit to such division, and more terminals than the limit cannot be simultaneously connected to one base station. In addition, since the connection between the base station and the terminal is made wirelessly, there is a problem that the connection between the base station and the terminal cannot be made if any noise or interference occurs. For this reason, the cordless surveillance camera device has an advantage that the wireless connection to the monitor unit facilitates installation, but the wireless connection may not be able to connect to the monitor unit when necessary. That is, it has a drawback. For example, to prevent the cordless surveillance camera device from being deliberately connected to the wireless network, connect a terminal beyond the limit or generate jamming radio waves, destroy the cordless surveillance camera device during this time, It is possible to make it impossible to transfer the obtained image and sound information to the monitor unit.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to solve these problems, and has a surveillance camera, in which audio and image data captured by the surveillance camera are transferred by wireless communication. And a monitor for receiving and displaying audio and image data captured by the surveillance camera, wherein a cordless handset that transmits and receives using optical communication in addition to the wireless communication is the surveillance camera. When a line disconnection is detected during transfer of photographed voice and image data using wireless communication, the sound captured by the surveillance camera is transferred by switching to the optical communication and transferring to a slave unit capable of wireless communication. And a cordless surveillance camera system capable of displaying image data on the monitor.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a basic configuration diagram of a cordless surveillance camera system of the present invention, FIG. 2 is a diagram for explaining the operation of the cordless surveillance camera device of the present invention, and FIG. 3 is a cordless surveillance camera device of the present invention. FIG. 7 is a diagram for explaining an initial operation of FIG. In FIG. 1, a monitoring camera apparatus 100 obtains image information of a monitoring target by an image information input unit 101, encodes the information by an image information encoding unit 102, stores the encoded information in an image information storage unit 103, and outputs sound information of the monitoring target to a sound. The image information obtained by the information input unit 121, encoded by the sound information encoding unit 122, stored in the sound information storage unit 123, and the image information stored in the image information storage unit 103 by the multiplexing unit 104 and the sound information storage unit The multiplexing unit multiplexes the sound information stored in the unit 123 and transmits the multiplexed information via the transmitting / receiving unit 105 and the antenna.

[0006] The adjacent camera information search unit 240 calculates the installation position of the adjacent cordless surveillance camera device based on the emission signal of the adjacent cordless surveillance camera device, and stores it in the adjacent camera information storage unit 245. The adjacent camera information search unit 240 searches for a cordless surveillance camera device installed in the target direction obtained by the image information input unit 101, and sends position information to the image information analysis unit 242.

[0007] The surveillance information analysis unit 242 cuts out the light emission information from the adjacent cordless surveillance camera device from the image obtained by the image information input unit 101 based on the position information from the adjacent camera information search unit 240, and The encoded data is stored in the encoded data storage unit 243 as encoded data. The multiplexing unit 244 multiplexes the coded data of the image and audio information obtained by the cordless surveillance camera device 100 from the multiplexing unit 104 and the coded data stored in the coded data storage unit 243. The multiplexed data is transmitted by the light emitting unit 241 as a light emission signal to another adjacent cordless surveillance camera device.

In FIG. 2, when the cordless surveillance camera device 100 and the local cordless telephone connection device 8 cannot be connected to each other (), the cordless surveillance camera device 100 blinks the light emitting unit when the person 5 is photographed, and the image and sound are reproduced. The encoded data of the information is transferred to the adjacent cordless surveillance camera device 11.
Transfer to 0 (). Cordless surveillance camera device 11
When 0 and 111 cannot be connected to the local cordless telephone connection device, the light emitting unit is similarly turned on and off, the encoded data is sequentially transferred, and the encoded data is transferred to the cordless surveillance camera device 112 (()).

When the cordless surveillance camera device 112 can be connected to the local cordless telephone connection device 9, the cordless surveillance camera device 112 connects to the local cordless telephone connection device 9 () and transfers the encoded data to the monitor unit 1. Yes (). The monitor unit 1 observes the image and audio information obtained by the cordless surveillance camera device 100 using the monitor 6 (). This allows the cordless surveillance camera device to transfer the image and audio information obtained by the cordless surveillance camera device to the monitor unit even when the cordless surveillance camera device cannot be connected to the wireless network due to noise, jamming radio waves, and the like. Become.

In FIG. 3, surveillance camera devices 110, 1
When the monitoring camera device 100 is newly installed in the monitoring device 11 or 112, the monitoring camera device 100 is installed at the installation location, and the monitoring camera device 100 is connected from the cordless telephone 200 connected to the monitor unit 1 or the local cordless telephone connection device 8.
Surveillance camera devices 110, 111, 1
A call number 12 and a signal to start the registration operation are sent. Neighbor camera search unit 240 of surveillance camera device 100
Calls the other surveillance camera devices 110, 111, and 112, sends a signal requesting start of acquisition of position information of the surveillance camera device 100, and starts blinking the light emitting unit 241. The surveillance camera devices 110, 111, and 112 check whether the blinking of the light emitting unit 241 of the surveillance camera device 100 can be perceived over the entire field of view, and if the blinking can be perceived, store the position information in the adjacent camera information storage unit 245, The surveillance camera device 100 is notified of the perception. On the other hand, if it cannot be perceived, it is determined that the
Inform 0.

The surveillance camera device 100 stores the perceived call number of the surveillance camera device in the adjacent camera information storage unit 24.
5 and the light emitting unit is turned off. Further, the light emitting units of the other monitoring camera devices 110, 111, and 112 are sequentially blinked, and the monitoring camera device 100 causes the monitoring camera devices 110, 111, and 1 to blink.
Check the entire area to see if you can perceive the blinking of the 12 light emitting units,
The information is stored in the adjacent camera information storage unit 245. This allows
It is possible to update the adjacent camera information storage unit 245 of each monitoring camera device without requiring any manpower. Note that the light emitting unit may also be used as a warning light for warning. Also, by changing the emission color of the light emitting unit for each cordless surveillance camera device, a plurality of cordless surveillance camera devices can be identified, or by using a plurality of emission colors for the light emitting unit of one cordless surveillance camera device, It is also conceivable to increase the transfer speed of transfer from one cordless surveillance camera device.

[0012]

As described above, according to the present invention, a line disconnection is detected when a slave unit having an optical communication function in addition to a wireless communication function is transferring voice and image data using wireless communication means. Sometimes, by switching to optical communication, the monitoring data can be displayed on the monitor.

[Brief description of the drawings]

FIG. 1 is a basic configuration diagram of a cordless surveillance camera system of the present invention.

FIG. 2 is a diagram for explaining the operation of the cordless surveillance camera device of the present invention.

FIG. 3 is a diagram for explaining an initial operation of the monitoring camera device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Monitor part 4 Public line network 5 people 6 Monitor 7 Private branch exchange 8 Private cordless telephone connection machine 9 Private cordless telephone connection machine 100 Cordless surveillance camera device 101 Image information input part 102 Image information encoding part 103 Image information storage part 104 Multiplexing Unit 105 transmitting / receiving unit 106 antenna 110 cordless surveillance camera device 111 cordless surveillance camera device 112 cordless surveillance camera device 200 cordless telephone 240 adjacent camera information search unit 241 light emitting unit 242 image information analysis unit 243 coded data storage unit 244 multiplexing unit 245 adjacent Camera information storage

Claims (2)

[Claims] 1. A slave unit having a surveillance camera and transferring voice and image data shot by the surveillance camera by wireless communication, and a monitor for receiving and displaying voice and image data shot by the surveillance camera In a cordless surveillance camera system comprising: when a slave unit that transmits and receives using optical communication in addition to the wireless communication is transferring voice and image data captured by the monitoring camera using wireless communication A cordless surveillance camera system characterized in that when a line disconnection is detected, voice and image data captured by the surveillance camera can be displayed on the monitor by switching to the optical communication and transferring to a slave unit capable of wireless communication. 2. The cordless device according to claim 1, wherein a warning lamp is used as a light emitting unit when data is transferred using the optical communication, and an image capturing unit of the monitoring camera is used as a light receiving unit. Surveillance camera system.