JPH10283579A - Abnormality alarm device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an abnormality alarm device which improves the precision to detect a human body without dropping the detection precision of a fire in an abnormality alarm system which monitors crime prevention and a fire. SOLUTION: An amplifier circuit 20 for a fire which amplifies an output signal of an infrared sensor S is provided, the output signal of the sensor S is amplified, an amplifier circuit 10 for a human body whose amplification factor is higher than an amplification factor in the circuit 20 is provided, usually, the output signal of the sensor 5 is outputted to the circuit 10, when a temperature detecting means 30 detects that the temperature of a measured object is more than 40 deg.C, a switch controlling means 31 which controls of the switching of a switching means SW so that the output signal of the sensor S may be outputted to the circuit 20 is provided, and an abnormality alarm means 50 which performs abnormality alarm in accordance with output levels of the circuits 10 and 20 is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an abnormality monitoring system for monitoring an object to be measured by an infrared camera.

[0002]

2. Description of the Related Art A conventional alarm system for monitoring crime prevention and fire is provided with an infrared sensor, which detects infrared rays emitted from a human body and infrared rays emitted from a flame at the time of a fire.
The infrared sensor detects. Then, the output signal of the infrared sensor is amplified by one amplifier, and the output signal of this amplifier is 30 to 40. A component corresponding to C; C
Separates into higher components than 30-40. If the level of the component corresponding to C is greater than or equal to the first threshold, it is determined that a human is present, and 40. If the level of the component higher than C is equal to or greater than the second threshold, it is determined that a fire has occurred.

[0003]

However, in the above conventional example, when a fire occurs, 40 of the output signals of the amplifier are output. The level of components higher than C is very high, compared to 30-40. 30 to 40 because the level of the output component in the range of C is low. The output component in the range of C is comparable in level to the noise component in the output component of the amplifier, and is therefore 30-40. C
The accuracy of detecting the level of the component corresponding to is low.

[0004] In other words, the above-described conventional abnormality alarm system includes:
When monitoring crime prevention and fire, there is a problem that the accuracy of detecting a human body is low.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an abnormal alarm system for monitoring both crime prevention and fire, which can increase the accuracy of detecting a human body without lowering the accuracy of fire detection. It is assumed that.

[0006]

According to the present invention, there is provided an abnormality monitoring system for monitoring an object to be measured by an infrared sensor, wherein a flame amplification circuit for amplifying an output signal of the infrared sensor is provided to amplify an output signal of the infrared sensor. An amplification circuit for the human body having an amplification factor higher than the amplification factor of the flame amplification circuit is provided, and the output signal of the infrared sensor is always output to the amplification circuit for the human body, and the temperature of the device under test is 40. When the temperature detection means detects that the temperature is higher than C, switch control means for controlling switching of the switch means is provided so as to output the output signal of the infrared sensor to the flame amplification circuit. This is an apparatus provided with abnormality alarm means for issuing an abnormality alarm according to the output level and the output level of the flame amplifier circuit.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram of an abnormality alarm device 100 according to one embodiment of the present invention.

An abnormality alarm device 100 is an abnormality monitoring system for monitoring an object to be measured by an infrared sensor S, and includes an infrared sensor S, a motor M for controlling the angle of the infrared sensor S, switch means SW, and a human body. Amplifier circuit 10
Amplifying circuit 20 for flame, temperature detecting means 30, switch control means 31, control means 40, alarm means 50,
It has an angle detection circuit 60 and a display 70.

The temperature detecting means 30 is means for detecting the temperature of the object to be measured based on the output signal of the infrared sensor S, and the flame amplifier circuit 20 is a circuit for amplifying the output signal of the infrared sensor S. The human body amplifier circuit 10 is a circuit that amplifies the output signal of the infrared sensor S and has a higher amplification factor than the amplification factor of the flame amplification circuit 20.

The switch means SW is a switch means for switching and outputting the output signal of the infrared sensor S to the flame amplification circuit 20 and the human body amplification circuit 10.

The switch control means 31 normally outputs the output signal of the infrared sensor S to the human body amplifying circuit 10 so that the temperature of the object to be measured is 40. Control means for controlling switching of the switch means SW so that when the temperature detecting means 30 detects that the temperature is higher than C, the output signal of the infrared sensor S is outputted to the flame amplifier circuit 20.

The control means 40 is a means for performing image processing based on one output signal of the amplifier circuits 10 and 20, and displaying a temperature distribution on the display 70.

The alarm unit 50 is an abnormal alarm unit that issues an alarm according to the output level of the human body amplifier circuit 10 and the output level of the flame amplifier circuit 20.

The control means 40 includes a human body discriminating operation,
A flame determining operation and an arson determining operation are executed.
In the human body discriminating operation, the temperature detecting means 30 performs 30 to 40. If the level of the component in the temperature range is equal to or higher than a predetermined level when the component C is detected, the temperature range is cut out, and the monitored object is a human body based on the range. This is an operation for distinguishing between a small animal and a small animal.
In the flame discriminating operation, the temperature detecting means 30 performs 120. This is an operation of cutting out a temperature region when a component having a temperature of C or higher is detected and determining that a flame exists based on the region.

Regarding the temperature to be determined, the temperature in the combustion state is at least 400 ° C., but when the fire is determined for a pit staying in a garbage cleaning plant, the temperature is 120 ° C.
Is determined as a threshold value. This is because when a temperature equal to or higher than the boiling point of water is detected, it is considered that a fire has occurred and the heat storage state before the ignition is detected at an early stage.

In the arson determination operation, when it is determined that a human body is present, it is determined that a flame region exists around a human body region cut out from an image obtained based on the output signal of the sensor S. For example, this is an operation for determining that a arson or misfire has occurred. In this case, in the human body discriminating operation,
The fact that the human body region is detected is stored, and when a flame is detected in the next flame determination operation, the detected flame region is compared with the stored human body region.

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

FIG. 2 is a flowchart showing the operation of the above embodiment.

First, the switch control means 31 always connects the switch means SW to the human body amplifier circuit 10, that is, the output signal of the infrared sensor S is supplied to the human body amplifier circuit 10.

Here, the field of view of the infrared sensor S is scanned by the motor M, and the temperature distribution in the field of view is measured (S
1) The measured temperature distribution in the visual field is displayed on the display 70 (S2). At this time, the measurement temperature T
If no high-temperature region exceeding the human body determination temperature (for example, 30.C) is detected (S3), the same operations of scanning, temperature distribution measurement, and display display as above (S1, S2).
repeat.

And 30. A temperature region equal to or higher than C is detected (S3), and the detected temperature is 40. If it is lower than C (S10), the temperature distribution is 30. The size of the object to be measured in the temperature region equal to or higher than C is recognized. If the recognized size is equal to or larger than a predetermined threshold (S11), it is determined that a human body has been detected (S12). The human body region is stored in a memory (not shown) (S12a), and step S1 is performed.
Return to

If the recognized size is less than the predetermined threshold (S11), it is determined that a small animal has been detected (S13), and the process returns to step S1.

On the other hand, the detected temperature is 40. If it is not less than C (S10), the switch control means 31
Is switched, and the output signal of the infrared sensor S is sent to the flame amplification circuit 30 (S21).

Then, a flame determining temperature, for example, 120.
If a high temperature region equal to or higher than C is detected (S22), a fire alarm is issued (S24) if the human body region is not already stored or if the human body region is stored but not adjacent (S23).

On the other hand, the human body region has already been stored and detected 120. If the high-temperature region equal to or higher than C is adjacent to the human body region stored in the memory (S23), it is determined to be arson, and an arson report is made together with a fire alarm (S2).
5).

The arson notification may be such that a arson is reported at the same time as the fire alarm by using a bell, a sound, a lamp, or the like. Instead of emitting light or the like, information indicating that arson has been detected may be stored in a memory or the like, and the arson information may be retrieved later. Then, based on this arson notification, arson measures can be taken.

The above operation is an operation when the infrared camera is used as the infrared sensor S. However, an infrared sensor that outputs an average temperature in a predetermined monitoring area may be used as the infrared sensor S. As described above, when the infrared sensor that outputs the average temperature of the predetermined monitoring area is used as the infrared sensor S, the area cannot be determined, so that it is limited to detecting only the human body or only the flame. That is, since the infrared sensor cannot recognize the temperature distribution in the monitoring range, the detection values are unified, the comparison of the areas cannot be performed, and the ignition cannot be determined.

As means for changing the amplification factor as the resolution in the amplifier, two amplification circuits having different amplification factors are provided, and instead of switching between these amplification circuits, an optical circuit is provided near the front position of the sensor S. A filter is installed, and the above-mentioned optical filter is made to enter the path position where the infrared rays incident on the sensor S pass, to limit the amount of light incident on the sensor S, or the optical filter is retracted from the path to make the incident light on the sensor S. The light amount may be increased.

That is, the amplifier circuit for flame and the amplifier circuit for human body are constituted by one amplifier circuit, an optical filter is installed near the front position of the sensor S, and the one amplifier circuit is used as an amplifier circuit for human body. When the optical filter is retracted from the path position through which the infrared rays incident on the sensor S pass,
On the other hand, when the one amplifier circuit is used as a flame amplifier circuit, an optical filter may enter the path to limit the amount of light incident on the sensor S.

In the above embodiment, the monitoring data may be added to the video signal of the monitoring area and transmitted. Note that the monitoring data is data such as the center of gravity, the average temperature, the number of human bodies, the number of flames, and the like in the cut-out region detected as a human body or a flame. In addition, in order to detect monitoring data, it is necessary to detect 30 to 40 detected as a human body.
℃ area, the area of 120 ℃ or more detected as flame,
Cut out from the image data, consider the predetermined temperature as weight,
Calculate the center of gravity of that temperature. When the cut-out areas are separated from each other, the respective centers of gravity are obtained, and simultaneously the individual average temperatures are obtained.

In each of the above cutting processes, it is preferable that the center of gravity and the average temperature are obtained based on the temperature and the area, and are displayed on the display 70 together with the area.

Alternatively, the monitoring data may be transmitted by LAN transmission separately from the video signal obtained by capturing the monitoring area. In this case, the direction and the monitoring range of the infrared camera are controlled by the monitoring center. Preferably, control means is provided.

That is, an area detected as a human body or a flame, which is formed of at least one of the data of the center of gravity, the average temperature, the number of human bodies, and the number of flames in the area cut out from the image area. The infrared sensor transmits the monitoring data on a video signal obtained by photographing the monitoring area by the infrared sensor, or separates the video signal from the LA.
Transmit by N transmission.

Further, even if a video signal cannot be transmitted for protection of privacy, by transmitting monitoring data, a quick and effective response can be made.

[0035]

According to the present invention, in an abnormality alarm system for monitoring both crime prevention and fire, it is possible to increase the accuracy of detecting a human body without lowering the accuracy of fire detection.

[Brief description of the drawings]

FIG. 1 is a block diagram of an abnormality alarm device 100 according to one embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the embodiment.

[Explanation of symbols]

 S: infrared sensor, SW: switch means, M: motor, 10: amplifier circuit for human body, 20: amplifier circuit for flame, 30: temperature detection means, 31: switch control means, 40: control means, 50: alarm means, 60: Angle detection circuit, 70: Display.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI H04N 7/18 H04N 7/18 N

Claims (4)

[Claims] An abnormality monitoring system for monitoring an object to be measured by an infrared sensor, a temperature detecting means for detecting a temperature of the object to be measured based on an output signal of the infrared sensor; Amplifying circuit for amplifying flame; amplifying circuit for human body which amplifies an output signal of the infrared sensor and having an amplification factor higher than the amplification factor of the amplifying circuit for flame; Switch means for switching between the circuit and the human body amplifying circuit and outputting the same; normally, the output signal of the infrared sensor is output to the human body amplifying circuit, and the temperature of the device under test is approximately 40. Switch control means for controlling switching of the switch means so as to output an output signal of the infrared sensor to the flame amplifier circuit when the temperature detection means detects that the temperature is higher than C; Alarm means for issuing an alarm based on the output level of the amplifier circuit for flame and the output level of the amplifier circuit for flame. 2. The method according to claim 1, wherein a center of gravity, an average temperature, and the like in a region detected as a human body or a flame, which are cut out from the image region.
The number of human bodies, the monitoring data composed of at least one of the data of the number of flames, the infrared sensor transmits a video signal obtained by shooting a monitoring area, or separately from the video signal, An abnormality alarm device for transmitting data by LAN transmission. 3. The abnormality alarm device according to claim 2, further comprising control means for controlling a direction or a monitoring range of the infrared sensor by a monitoring center. 4. The amplifying circuit according to claim 1, wherein the amplifying circuit for flame and the amplifying circuit for human body are constituted by one amplifying circuit, and an optical filter is provided near a front position of the infrared sensor. When the circuit is used as the human body amplifying circuit, the optical filter is retracted from a path position through which the infrared light incident on the infrared sensor passes, while the one amplifying circuit is used as the flame amplifying circuit. In some cases, the optical filter enters the path to limit the amount of light incident on the infrared sensor, and the switch means is a means for moving the optical filter forward and backward from the path.