JP4946598B2 - Recording / playback device for monitoring - Google Patents

Description

  The present invention relates to a monitoring recording / reproducing apparatus.

  In recent years, due to the deterioration of public safety, the demand for monitoring systems has increased rapidly. As the demand for products has increased, attention has been focused on power-saving technologies for monitoring systems that have been less conscious. In the prior art described in Japanese Patent Laid-Open No. 8-9360 (Patent Document 1), which is a power-saving technique for a monitoring system, a plurality of monitoring cameras, a monitor for displaying images from the cameras, a switching unit for switching the monitor screen, Sensor unit for detecting an abnormality, discriminating unit for determining whether there is an abnormality, an alarm unit for sounding an alarm when an abnormality occurs, a recording unit for recording an image at the time of an abnormality, a control unit for controlling them, and power for supplying power to these devices It consists of parts. In the normal monitoring state, the preheat power is supplied from the power supply unit to the sensor unit, the determination unit, and the control unit. When the determination unit detects an abnormality, the monitoring camera and the camera switching unit are added to the preheat power from the power supply unit. In this monitoring system, power is reduced by supplying power to the monitor.

JP-A-8-9360

  In the monitoring system, it is necessary to always operate the system and turn on the power because of its use. Therefore, there is a strong demand for means for suppressing the power consumption as much as possible while sufficiently satisfying the purpose of recording valuable images, which is the original purpose of the surveillance system.

  In the prior art described in Document 1, since power supply to each unit is started from the moment of detecting the abnormality of the sensor, it is not possible to record before the event that caused the abnormality to be detected. There is a trade-off relationship between reducing power consumption and maintaining high accuracy of the monitoring system, and the conventional technology of Patent Document 1 sufficiently reduces the power consumption so that the original use of the monitoring system is sufficient. It can be said that it is not satisfied. In addition, if the intended use of the surveillance system is sufficiently fulfilled, dozens of surveillance cameras can be connected to one surveillance recording / reproducing device, so the surveillance range becomes wide and abnormal events occur. Even a place far away from the current location will be recorded, resulting in a problem of consuming a lot of power.

  Therefore, the present invention proposes a control means for recording a precious image with high accuracy and without omission as an application of the monitoring system, and aims to suppress the power consumption of the monitoring system as much as possible. To do.

  In order to solve the above-described problems, the present invention uses the configuration described in the claims as an example.

  According to the present invention, it is possible to reduce power consumption of a monitoring recording / reproducing apparatus and to record a valuable image without omission in the monitoring system.

  Embodiments according to the present invention will be specifically described below with reference to the drawings.

  FIG. 1 is a block diagram of a monitoring system constituted by the monitoring recording / reproducing apparatus of the present invention. The configuration and operation of a monitoring system constituted by the monitoring recording / reproducing apparatus of the present invention will be described below with reference to FIG.

  In the embodiment shown in FIG. 1, a monitoring recording / reproducing apparatus (hereinafter referred to as a recording / reproducing apparatus) 0 and a monitoring camera (hereinafter referred to as a camera) installed at a predetermined location and connected to the recording / reproducing apparatus 0 are used. 1 to 16, and an AC plug 17 for supplying power to the recording / reproducing apparatus 0. The AC plug 17 supplies power to the recording / reproducing apparatus 0 and the monitoring cameras 1 to 16 connected thereto.

  The cameras 1 to 16 include sensor units 101, 201,... 1501, 1601 that detect an abnormality. When the cameras 1 to 16 detect an abnormality, a signal is transmitted to the signal analysis unit 003 inside the recording / reproducing apparatus 0. .

  The recording / reproducing apparatus 0 supplies the AC power input from the AC plug 17 to the power supply circuit 009 that converts the DC power to DC power. The rectifier circuit 001 converts the AC power to DC power and supplies the DC power. When the power switch 002 is turned on, it is divided into a B power source 017 that supplies DC power.

  A power supply 010 includes a control circuit 005 for controlling the system and recording / reproduction of the entire recording / reproducing apparatus 0, a memory 006 for temporarily storing video data, a camera control unit 004 for controlling a connected camera, It is connected to a signal analysis unit 003 that analyzes a signal input from a sensor and stores video data in a memory, and continues to supply DC power to the recording / reproducing apparatus 0 as long as power is supplied from the AC plug 17. .

  On the other hand, the B power supply 017 is connected to a hard disk (HDD) 007 for recording and storing video data, and to a display LED other than the fan motor, buzzer, and power switch 13 (not shown in FIG. 1).

  The camera control unit 004 of the recording / reproducing apparatus 0 controls power supply to the connected cameras 1 to 16, and the camera control unit 004 can turn on / off the power supply for each camera. As the power to be supplied, DC power is superposed on the video signal lines from the cameras (1 to 16) input to the video input terminals (011 to 016).

The recording / reproducing apparatus 0 operates the menu operation button 008 to turn off the DC power switch 002, stop the supply of the B power supply 017, and control circuit 005 connected to the A power supply, the camera control unit 004, A state in which power is supplied only to the memory 006 and power consumption can be reduced is provided. This state is set to “standby state” by the menu operation button 008. In the standby state, the camera control unit 004, but may be controlled so as to supply power only to the particular camera set by the user, the image being projected by the previous SL particular camera it is temporarily stored into the memory 006. Further, by operating the menu operation button 008, it is possible to switch to the normal recording state in which recording / reproducing can be performed on the hard disk (HDD) 007 of the recording / reproducing apparatus 0. This state is referred to as “power-on state”. When in the power-on state, the DC power switch 002 is turned on and power is supplied from the A power source 010 and the B power source 017. In the power-on state, video data obtained by encoding the video signals input from the cameras 1 to 16 to the video input terminals 011 to 016 by the signal analysis unit 003 is temporarily stored in the memory 006 and then stored on the hard disk ( HDD) 007.

  When a signal transmitted from any of the sensor units 101 to 1601 provided in the cameras 1 to 16 is input to the signal analysis unit 003 of the recording / reproducing device 0, the recording / reproducing device 0 is in a power-on state and the memory 006 The video data temporarily stored in is stored in the hard disk (HDD) 007, and the subsequent input video data is also recorded in the hard disk (HDD) 007.

  In this recording / reproducing apparatus, the menu operation button 008 is used to “group” the connected cameras (1 to 16) according to the installation location and usage, and the plurality of cameras selected by the user are regarded as the same group, It is possible to control the operation of all cameras in the group in synchronization with an abnormal alarm issued by one camera. In addition, in a camera set as a group, attributes within the group can be set as “parent camera” and “child camera” belonging to the parent camera.

FIG. 2 shows an example of a monitoring system that is actually configured using the recording / reproducing apparatus 0. With reference to FIG. 2 and FIG. 1, a description will be given of a means for preventing the recording of valuable images from being missed while using “grouping” while operating with minimum power consumption.
FIG. 2 assumes an actual surveillance camera installation environment.
The room 50, the room 51, the passage 52, and the outdoor 53 are respectively a room, a passage, and the outdoors where four cameras are installed.

For the cameras (1 to 16) installed in each room and passage, the cameras 1 to 4 installed in the room 50, 5 to 8 installed in the room 51, and 9 installed in the passage 52 -12 and four groups of 13-16 installed in the outdoors 53.
The movement when the connected surveillance cameras are grouped and controlled using the surveillance recording / reproducing apparatus 0 will be described with reference to FIGS. 1 and 2. FIG. Of the four surveillance cameras installed in the room 50, the room 51, the passage 52, and the outdoor 53, the cameras 1, 5, 9, and 13 surrounded by circles are positioned as the parent cameras of each group. Position the other camera as the child camera.

  The parent camera is set to a standby state, and control is performed so that power is supplied only from the camera control unit 003 to the parent camera, and power is not supplied to the child camera and the child camera is stopped. By doing so, one camera that is the parent camera for each room and passage performs pre-recording in the standby state, so that it is when an intruder into the room and passage is detected and an abnormal alarm is generated. However, recording can be performed by one parent camera before the occurrence of the event, and the cameras installed in the other child cameras do not consume power, so that power consumption can be reduced. However, since the camera has a limited viewing angle, it is not possible to capture the entire room and the end of the passageway from one end to the other with a single camera. Therefore, the monitoring camera positioned as a child camera is turned on by using an alarm signal generated from the sensor unit 101, 501, 901, 1301 of the parent camera of the same group as a trigger, and the DC power switch 002 is set in synchronization therewith. The power is supplied to each part including the hard disk (HDD) 007, and the signal analysis unit 003 controls the video input from the camera via the video input terminal 101 to the hard disk (HDD) 007. Perform recording control. A child camera that is not in the same group as the parent camera that generated the alarm is kept in a power-off state to prevent wasteful power consumption. The child cameras that are powered on start up in the power-on state at the beginning, but each target sensor detects the target and can be photographed if there is no response to each sensor for a certain period of time. It is determined that there is no object in the range, and the camera is shifted to a standby state regardless of whether it is a parent camera or a child camera, thereby reducing power consumption. Further, when there is no response for a certain time or more in the sensors included in all the cameras in the group, the power supply to the cameras belonging to the child camera is stopped, and only the parent camera is shifted to the standby state.

  FIG. 3 shows an example of a group in which the camera 1 is a parent camera. The power status of the parent camera 1 and the child cameras 2, 3 and 4 before and after the alarm is generated, and the recording state to the hard disk (HDD) are timed. -Written on a chart.

  The parent camera 1 is set in a standby state, and is operating in a state where video data is temporarily stored in a memory. At that time, the child cameras of the same group are in a stopped state and are not receiving power. Triggered by the occurrence of an alarm from the sensor of the parent camera in event 1, the temporary recording of the parent camera stored in the memory so far is transferred to the hard disk (HDD) and recorded. In synchronism with this, power supply to the child cameras 2, 3, and 4 is started, and the images of the child cameras 2, 3, and 4 are also recorded on the hard disk (HDD). Thereafter, when a state in which the object is not detected occurs in the sensor attached to each camera for a certain time or more, it is determined that there is no object, and the parent camera 1 shifts to the pre-alarm recording state, and the child camera 2, 3, and 4 shift to a stop state.

  By grouping as described above, it is possible to record precious images without omission while maximizing power consumption.

  As described above, in the present invention, in order to solve the conventional problem, it is assumed that the monitoring recording / reproducing apparatus has a standby state in which only a predetermined circuit block is operated. The monitoring recording / reproducing apparatus having the standby state performs pre-recording in the memory from the moment before the occurrence of the abnormal alarm when the supply of power to the entire device is started by the abnormal alarm detected by the connected sensor. This is a device that has a function capable of recording images and reduces power consumption by operating only necessary blocks inside the device when no abnormal alarm occurs. Control means for controlling power supply to a plurality of surveillance cameras connected to such a surveillance recording / reproducing apparatus is provided. The control means means that a plurality of connected cameras can be freely selected and managed by a user (grouping) according to the place where the camera is installed and its use (grouping). This is a possible means. What kind of management means grouping here means that a plurality of surveillance cameras connected to a single surveillance recording / reproducing device can be freely adapted to a user's usage environment. It is possible to group cameras, and if four cameras are selected and grouped from among the connected cameras, only one of the grouped cameras is operated, The supply of power to other than the camera is stopped. When an abnormality is detected by one unit that is supplied with power, the abnormality alarm is triggered to start supplying power to the other three cameras that were grouped together. This is a system for recording a video image monitored in the system. For other cameras that do not exist in the same group, an abnormality detected by one operating camera does not act as a trigger. The above grouping control makes it possible to focus on monitoring the area around where an abnormality has been detected, and to record valuable images without omission, as well as cameras installed in less relevant places. Therefore, precious images can be recorded without omission and power saving can be realized without supplying power.

  According to the present invention, in the monitoring recording / reproducing apparatus, it is possible to efficiently control the power supply to a plurality of connected monitoring cameras, and the most important in the reduction of power consumption and the monitoring system. It is possible to record precious images that are the purpose of use without omission.

The block diagram of the monitoring system comprised by the recording / reproducing apparatus for monitoring of this invention Specific specification environment diagram of the present invention Trends in power supply status by control of the present invention

Explanation of symbols

0 ... Recording device for monitoring
001 ... Rectifier circuit
002 ... DC power switch
003 ... Signal analysis unit
004 ... Camera control unit
005 ... Control circuit
006 ・ ・ ・ Memory
007 ... HDD
008 ... Menu operation buttons
009 ・ ・ ・ Power supply circuit
010 ・ ・ ・ A power supply
011 ~ 016 ・ ・ ・ Video input terminal
017 ・ ・ ・ B power supply
1 ~ 16 ... Monitoring camera
101 ~ 116 ・ ・ ・ Sensor part

Claims (3)

In a monitoring recording / reproducing apparatus having a standby state for operating a predetermined circuit block,
For a plurality of cameras connected to the monitoring recording / playback device, the user can freely select them according to the installation location and use thereof, and perform grouping to manage them together. Position the camera in the group as a parent camera and a child camera other than the parent camera,
Prior to the timing at which the sensor connected to the parent camera generates an abnormal alarm, the parent camera is supplied with power and enters a standby state in which video data of the parent camera is pre-recorded in memory, The child camera is in a stopped state,
When the abnormal alarm occurs, the pre-recording of the parent camera and the video data of the parent camera are recorded, and the power supply to the child camera is started, and the video data of the child camera is recorded. A recording / reproducing apparatus for monitoring. The monitoring recording / reproducing apparatus according to claim 1,
The monitoring recording / reproducing apparatus , wherein the child camera is in the same group as the parent camera . The monitoring recording / reproducing apparatus according to claim 1 or 2,
After the abnormality alarm occurs, in each sensor connected to each camera of the parent camera and the child camera, when the object is not detected for a certain time or more, the parent camera is in the standby state, A monitoring recording / reproducing apparatus, wherein the child camera is in the stopped state .

Images