JP2001127916A - Monitoring camera system for burglar prevention - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a monitoring camera system for burglar prevention useful to crime prevention, even in cases where a person is not near a camera- monitoring master unit and answering cannot be made to assist crime prevention, even though a camera monitoring slave unit transmits a calling signal to the camera-monitoring master unit and a ring tone rings in the camera- monitoring master unit, when a sensor detects abnormalities. SOLUTION: A telephone line 12 is connected to the camera-monitoring master unit 14-1, and when an answering switch 6 is not operated for a fixed period in response to the input of the calling signal from the camera-monitoring slave unit 4, a preset dial number is transmitted to the line 12 to make a call to a 2nd camera-monitoring master unit 14-2 installed at another place. A control circuit 8 controls, so that a video signal and an audio signal transmitted from the unit 4 are transmitted to the dialed destination, based on the response of the unit 14-2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a security surveillance camera system for monitoring images and sounds of a camera surveillance unit connected to a camera with a microphone from a remote place using a monitor.

[0002]

2. Description of the Related Art A conventional security surveillance camera system uses a surveillance camera to photograph a place where surveillance is required, and photographs the image on a monitor at a remote place, and a surveillance person monitors the crime while watching the monitor. Was something.

[0003] Alternatively, an observer does not always monitor on a monitor, but records an image taken by a surveillance camera on a videotape, and plays back the videotape later to help security.

[0004] In this case, however, it is a heavy burden for the observer to constantly monitor the observer.

[0005] In addition, in the case of always recording on a video tape, the recording time of the video tape is limited, so that it is necessary to frequently change the video tape.

Therefore, there is a method in which a sensor is installed at a place where the surveillance camera monitors, and the video of the surveillance camera is recorded on a video tape only when an abnormality is detected so that the video tape is not wasted.

[0007] However, such security monitoring camera systems are expensive to introduce, so that they can be introduced in large-scale facilities and the like, but are widely used in small shops, offices, and general private homes. Was difficult.

Next, when monitoring a small place at a low cost, there is the following system configuration. FIG. 2 shows the configuration of this system.

In FIG. 2, 1 is a camera with a microphone, 2 is a sensor installed near the camera 1 for detecting abnormalities, and 3 is a device for modulating and encoding video and audio signals input from the camera 1. And a control circuit for transmitting a calling signal when an abnormality is detected by the sensor 2. Reference numeral 4 denotes a camera monitor unit constituted by these components.

Reference numeral 14-1 denotes a camera monitoring master unit, which is connected to the camera monitoring slave unit 4 by a signal line 12-1.

The camera monitoring master unit 14-1 is composed of the following blocks.

Reference numeral 5 denotes a monitor for displaying an image of the camera 1, reference numeral 7 denotes a speaker that emits a ringing tone when a voice picked up by the microphone of the camera 1 and a calling signal from the camera monitoring slave unit 4 are input, and reference numeral 6 denotes a speaker from the speaker 7. A response switch operated when a ringing tone is heard.

Reference numeral 8 denotes a control circuit which decodes and demodulates a signal transmitted from the camera surveillance slave unit 4 and controls a ringing tone when a calling signal is input.

Next, the operation of the above configuration will be described.

In FIG. 2, when the sensor 2 detects an abnormality, the camera monitor slave unit 4 transmits a calling signal to the camera monitor master unit 14-1 via the signal line 12-1.

The control circuit 8 of the camera monitoring base unit 14-1 includes:
When this call signal is detected, a ringing sound is emitted from the speaker 7. When a nearby person operates the answering switch 6 by the ringing sound, the control circuit 8 demodulates and decodes the signal transmitted from the camera monitoring slave unit 4 to project an image on the monitor 5 and also displays the image on the monitor 5 from the microphone of the camera 1. The picked-up voice can also be demodulated into a voice signal and heard on the speaker 7.

In this way, the image from the camera 1 monitored when an abnormality occurs is displayed on the monitor 5 and the sound is heard from the speaker 7, which can be used for crime prevention.

[0018]

However, in the above-mentioned conventional security monitoring camera system, when an abnormality is detected by a sensor, a calling signal is transmitted from the camera monitoring slave unit to the camera monitoring master unit, and the camera monitoring master unit emits a ringing tone. It sounds, but it cannot respond unless there is a person near the camera surveillance base unit, and in such a case, it is not useful for crime prevention.

[0019]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and comprises connecting a camera equipped with a microphone and a sensor for detecting an abnormality installed near the camera, so that an image input from the camera can be obtained. And a camera monitoring slave unit having a control circuit for controlling transmission of a calling signal when an abnormality is detected by the sensor, and a calling signal transmitted from the camera monitoring slave unit. When receiving, output a ringing sound to the speaker, and when responding by operating the connected answer switch, display the image transmitted from the camera on the monitor, and place the microphone attached to the camera on the speaker. In a security surveillance camera system comprising a camera surveillance master unit having a control circuit for controlling so as to output audio transmitted from the camera, When a telephone line was connected to the master unit and the response switch was not operated for a certain period of time in response to the input of a call signal from the camera monitoring slave unit, a preset dial number was sent out to the telephone line and installed at another location. The second camera monitoring master unit is called, and the control circuit controls the video camera and the audio signal transmitted from the camera monitoring slave unit to be transmitted to the dial destination in response to the response of the second camera monitoring master unit. .

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the present invention, when an abnormality is detected by a sensor of a security monitoring camera system, a ringing signal is transmitted to a camera monitoring master unit to generate a ringing sound when a sensor of the security monitoring camera system is detected. If there are no people nearby,
Using a telephone line connected to the camera monitoring master, audio and video signals can be transferred to a second camera monitoring master installed at another location.

Also, in order to be able to periodically check whether or not the camera monitoring slave unit is functioning normally, a call signal is transmitted from the camera monitoring slave unit without periodically detecting an abnormality. In addition, it is possible to perform an operation test of the system by confirming video and audio from the camera monitoring master unit.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration will be described with reference to the drawings showing one embodiment of the present invention.

FIG. 1 is a block diagram of a security monitoring camera system showing one embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a camera with a microphone;
Is a sensor for detecting a human body installed near the camera 1.

Reference numeral 3 denotes an input of a video signal of the camera 1 and an audio signal picked up by a microphone, modulation and encoding of the signal, and input of a signal of the sensor 2. When the sensor 2 detects a human body, a call signal is output. This is a control circuit for controlling transmission to the signal line 12-1.

Reference numeral 4 denotes a camera surveillance slave unit composed of the above components.

Reference numeral 14-1 denotes a camera monitoring master unit, which is connected to the camera monitoring slave unit 4 by a signal line 12-1.

5 is a monitor for displaying the image of the camera 1,
Reference numeral 7 denotes a voice picked up from the microphone of the camera 1 and a speaker that sounds a ringing tone, 6 denotes a response switch, 8 denotes a control circuit, 1
Reference numeral 2 denotes a telephone line, and reference numeral 10 denotes a dial output circuit, which outputs a dial signal to the telephone line 12 under the control of the control circuit 8.

Reference numeral 11 denotes an incoming call detection circuit,
, And outputs it to the control circuit 8.

Reference numeral 13 denotes a telephone network, and 14-2 denotes a second camera monitoring base unit. The description of the same internal configuration as that of the camera monitoring base unit 14-1 will be omitted. A push button switch 22 is connected to the control circuit 18.

Next, the operation of the above configuration will be described.

First, when the camera monitoring base unit 14-1 responds to a call from the camera monitoring slave unit 4, the operation is as follows. The sensor 2 of the camera monitoring slave unit 4 outputs a signal indicating that a human body has been detected to the control circuit 3. Then, the control circuit 3 outputs a calling signal to the signal line 12-1.

The control circuit 8 of the camera monitoring master unit 14-1 is activated when a call signal is input from the signal line 12-1.
A ringing tone is output to the speaker 7 and the speaker 7 sounds.

The control circuit 8 returns a response signal to the control circuit 3 of the camera surveillance subunit 4 when a nearby person operates the response switch 6 upon hearing the ringing tone.

The control circuit 3 turns on the power of the camera 1 based on the response signal, inputs the video signal and the audio signal output from the camera 1, modulates and encodes the signal, and sends out the signal to the signal line 12-1.

The control circuit 8 decodes and demodulates this input, displays the image of the camera 1 on the monitor 5, and
Control is performed so that sound is emitted from the speaker 7.

Therefore, monitoring the video and audio projected by the camera with microphone 1 by the camera monitoring master unit 14-1 can be useful for crime prevention.

Next, the operation when the second camera monitoring master unit 14-1 responds to a call from the camera monitoring slave unit 4 will be described. A signal indicating that the sensor 2 of the camera monitoring slave unit 4 has detected a human body will be described. When output to the control circuit 3, the control circuit 3 outputs a call signal to the signal line 12-1. The control circuit 8 of the camera monitoring base unit 14-1 is activated when a calling signal is input from the signal line 12-1, and outputs a calling sound to the speaker 7 to sound the speaker 7.

At this time, if no one is in the vicinity of the camera monitoring base unit 14-1 and the answer switch 6 is not operated, the control circuit 8 stops outputting the ringing sound of the speaker 6 after a predetermined time, and A dial number set in advance is output by controlling the dial output circuit 10.

The control circuit of the second camera monitoring base unit 14-2 installed on the telephone line 12 of the dial number detects the bell signal input from the telephone line 12 via the telephone network 13 by the incoming call detection circuit 21. Then, the speaker 17 outputs a ringing tone.

When a person in the vicinity hears the ringing tone and operates the answering switch 16, the control circuit 18 controls the communication circuit 19 so as to close the DC circuit of the telephone line 12, whereby the camera monitoring base unit 14 is closed. -1 and a communication path is formed with each other.

Next, when the camera monitoring master unit 14-1 confirms that a communication path with the second camera monitoring master unit 14-2 has been formed, the control circuit 8 sends the control circuit 3 of the camera monitoring slave unit 4 to the control circuit 3.
A response signal is returned to.

When the control circuit 3 detects the response signal,
The power of the camera 1 is turned on, a video signal projected by the camera 1 and an audio signal picked up from a microphone are input, modulated, encoded, and transmitted to a signal line 12-1.

The control circuit 8 of the camera monitoring base unit 14-1 comprises:
The signal input from the signal line 12-1 is input to the control circuit 18 through the communication circuit 19 of the second camera monitoring parent device 14-2 via the telephone line 12 by the communication circuit 9, and the control circuit 18 converts this input signal. After decoding and demodulation, monitor 15
Is controlled so that the image of the camera 1 is projected to the speaker 17 and sound is output from the speaker 17.

Accordingly, the second camera monitoring master unit 14-2 via the telephone line 12 monitors the video and audio projected by the camera 1 with the microphone of the camera monitoring slave unit 4, which can be used for crime prevention.

As described above, the sensor 2 of the camera monitor
Sends a call signal to the signal line 12-1 when an error is detected, a ringing tone sounds from the speaker 7 of the first camera monitoring base unit 14-1 connected to the signal line 12-1, and the user is in the vicinity. When a person operates the response switch 6 to make a response, it is possible to monitor the image and sound projected on the camera 1.

When there is no person on the side of the first camera monitoring base unit 14-1 or when there is no operation of the response switch 6 for a certain period of time, it is installed in another place using the connected telephone line 12. By transferring the information to the second camera monitoring base unit 14-2, when a person on the side of the second camera monitoring base unit 14-2 responds, it is possible to monitor with the video and audio projected on the camera 1.

The security monitoring camera system according to the second aspect of the present invention is the security monitoring camera system according to the first aspect, wherein the camera monitoring slave unit 4 is preset in the control circuit even if the sensor 2 does not detect an abnormality. Cycle, for example, every morning 1
At 0:00, the control circuit 3 automatically sends a calling signal to the signal line 12-1, so that the camera monitoring master unit 14-1 sounds a ringing tone at around 10:00 every day and responds. By operating the switch 6, it is possible to confirm whether there is any abnormality in the monitoring camera system by confirming the video and audio projected on the camera 1.

Then, for example, an operation check such as a ringing tone does not sound at a fixed time, a ringing tone sounds and the answer switch 6 is operated, but no image is displayed on the monitor 5, or no sound can be heard from the speaker 7. If there is a problem, repairs can be made at an early stage.

According to a third aspect of the present invention, there is provided a security monitoring camera system according to the first aspect, wherein the push button switch 22 input to the control circuit 18 of the second camera monitoring master unit 14-2 is provided. When pressed, the control circuit 18
Controls the dial output circuit 20 to output a preset dial number of the telephone line 12 to which the camera monitoring base unit 14-2 is connected to the telephone line 12.

Then, the telephone line 12 is connected via the telephone network 13.
When the incoming call detection circuit 11 detects the bell signal input from the telephone line, the control circuit 8 closes the DC circuit of the telephone line 12 by controlling the communication circuit 9, and the second camera monitoring base unit 14 and the camera monitoring base unit 10 Create a communication path between

When the control circuit 8 sends a start signal to the signal line 12-1 connected to the camera monitor slave unit 4, the control circuit 3 of the camera monitor slave unit 4 detects the start signal, and When the power is turned on, the video and audio projected by the camera 1 are transmitted to the signal line 12-1.

The control circuit 8 of the camera monitoring base unit 14-1 sends this signal to the telephone line 12 via the communication circuit 9,
The control circuit 18 displays the video image of the camera 1 on the monitor 15 and outputs the sound to the speaker 17.

In order to terminate the video output of the monitor 15, when the push button switch 22 is pressed again, the control circuit 1
Reference numeral 8 controls the DC circuit of the telephone line 12 to open.

Therefore, the control circuit 8 of the camera monitoring master unit 14-1 terminates its operation and returns to a steady state because it cannot communicate with the control circuit 18 of the second camera monitoring master unit 14-2.

Next, the control circuit 3 of the camera monitor slave unit 4
When the communication with the camera monitoring base unit 14-1 becomes impossible, the operation is terminated, and the power of the camera 1 is turned off to return to the steady state.

As described above, by pressing the push button switch 22 from the camera monitoring master unit 14-1 at any time, the camera 1 of the camera monitoring slave unit 4 is operated, and the image of the camera 1 is captured by the monitor 5. Because it is possible to hear the voice, it is possible to monitor at any time.

[0058]

As described above, according to the present invention, the camera monitoring slave unit is connected to the camera monitoring master unit via a signal line, and the second camera is connected to the camera monitoring master unit via a telephone line. When an abnormality is detected by a sensor connected to the monitoring base unit,
If a call is made to the camera monitoring base unit and the camera monitoring base unit is not present and does not respond, after a certain period of time, dialing using a telephone line may transfer the call of the camera monitoring base unit to the second camera monitoring base unit. Monitoring can be performed without any trouble.

Further, the system operation can be checked by providing a function of periodically calling a calling signal and transmitting an image on the camera monitoring slave unit side.

By operating the push button switch of the camera monitoring base unit, the camera monitoring base unit can be called at any time, and the image projected by the camera of the camera monitoring base unit can be monitored from the camera monitoring base unit. The monitoring function that wants to see the state of the monitoring target is improved.

[Brief description of the drawings]

FIG. 1 is a block diagram of a security monitoring camera system showing one embodiment of the present invention.

FIG. 2 is a block diagram of a security monitoring camera system showing one embodiment of the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Camera 2 Sensor 3 Control circuit 4 Camera monitoring slave unit 5 Monitor 6 Response switch 7 Speaker 8 Control circuit 12-1 Signal line 14-1 Camera monitoring base unit 12 Telephone line 14-2 Second camera monitoring base unit

Claims (3)

[Claims] 1. A camera with a microphone (1) and a sensor (2) installed near the camera (1) for detecting an abnormality.
To control the transmission of the video and audio signals input from the camera (1), and the sensor (2)
A camera surveillance slave unit (4) including a control circuit (3) for controlling transmission of a call signal upon abnormality detection input
When a ringing signal transmitted from the camera surveillance cordless handset (4) is received, a speaker (7) is output so as to sound a ringing sound, and a response is made by operating the connected response switch (6). A control circuit (8) that controls the monitor (5) to display the video transmitted from the camera (1) and output the sound transmitted from the microphone attached to the camera (1) to the speaker (7). In the security surveillance camera system including the camera surveillance base unit (14-1) provided with the
If the answer switch (6) has not been operated for a certain period of time in response to the input of a call signal from the camera surveillance cordless handset (4), the preset dial number is set to the telephone line (1)
2), calls the second camera monitoring master unit (14-2) installed at another location, and responds to the second camera monitoring master unit (14-2) from the camera monitoring slave unit (4). A security monitoring camera system characterized in that a control circuit (8) controls a video signal and an audio signal to be transmitted to a dial destination. 2. The camera surveillance slave unit (4) transmits a call signal to a camera surveillance master unit (14-1) at a preset cycle even if a sensor (2) for detecting an abnormality does not detect an abnormality. Then, when the destination responds, an announcement using a speech synthesis signal that can be recognized as a test transmission or a camera (1)
2. The security monitoring camera system according to claim 1, wherein a video signal in which characters are displayed in a part of the video can be transmitted. 3. A calling signal is sent from the camera monitoring base unit (14-1) to the camera monitoring slave unit (4), and the camera monitoring slave unit (4) responds to the calling signal to provide a camera with a microphone. A control means for transmitting the video signal and the audio signal of (1), and capable of confirming the video projected by the camera (1) and the audio picked up by the microphone from the camera monitoring master unit (14-1) at any time is provided. 2. The security monitoring camera system according to claim 1, wherein: