JPH04358300A - Stay-in-room state informing device - Google Patents

Abstract

PURPOSE:To inform the stay-in-room state of each room when a fire breaks out. CONSTITUTION:A background image memory part 2 and a present image memory part 3 are connected to an image pickup part 1, and a difference computing part 4 is also connected to the part 1. The part 4 computes the difference between both parts 2 end 5 and is connected with a stay-in-room state detecting part 8. Both the part 8 and a fire alarm part 7 are connected to a stay-in-room state information deciding part 9a which is connected to an informing part 9. In such a constitution, the stay-in-room state is surely informed when a fire breaks out so that the persons can be guided and rescued.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a room occupancy alarm system that notifies a person who is present in a building at the time of a fire outbreak.

0002

2. Description of the Related Art Conventionally, it has been confirmed whether or not people are left behind in a building when a fire breaks out by monitoring the building with a surveillance camera or the like.

[0003] For this reason, television cameras for surveillance have been installed in corridors and the like, and images from the installed television cameras can be viewed in security rooms and the like.

0004

[Problems to be Solved by the Invention] However, with the above conventional configuration, it is not possible to install surveillance cameras in living rooms in buildings from the perspective of protecting the privacy of occupants, and buildings with many rooms such as hotels When a fire breaks out in
There was a problem in that it was not possible to confirm whether the guests had evacuated safely.

[0005] The present invention solves the above-mentioned problems and provides a room occupancy alarm device that protects privacy when a fire does not occur and notifies whether or not there is a person left in the room in the event of a fire. The purpose is to

[0006]

[Means for Solving the Problems] An imaging unit that captures an image of a room, a background image memory unit that stores a background image captured by the imaging unit, and a current image memory unit that stores a current image captured by the imaging unit. a difference calculation unit that performs a difference calculation between the background image memory unit and the current image memory unit; and a room presence detection unit that detects whether there is a person in the room based on the result of the difference calculation unit.
A fire alarm section that outputs a fire signal when a fire occurs, and an alarm section that is activated by a signal from the room occupancy detection section only when a fire occurs and a fire signal from the fire alarm section is received. It is something.

[0007]

[Operation] With the above configuration, the present invention extracts a difference image, that is, a moving object (a person moving in the room) from the current image photographed by the imaging unit and the background image, if it exists, When a fire occurrence signal is issued from the fire alarm section, a signal indicating the presence or absence of a moving object is transmitted from the room occupancy detection section to the alarm section. On the other hand, when the fire alarm section does not output a fire occurrence signal, the room occupancy detection section does not transmit a signal to notify the presence or absence of a moving object to the alarm section.

[0008]

[Embodiment] The first embodiment of the present invention will be described below with reference to FIGS. 1 to 3.
Explain with reference to.

In FIG. 1, 1 is an imaging section, and 2 is an imaging section 1.
a background image memory section for storing a background image input from 3;
4 is a current image memory section that stores the current image inputted from the imaging section 1; and 4 is a difference calculation section that performs a difference calculation between the background image in the background image memory section 2 and the current image in the current image memory section 3. The background image memory section 2, the current image memory section 3, and the difference calculation section 4 constitute a moving object extraction section 6. 9a is an occupancy notification determination unit that determines whether or not to send a signal to the notification unit 9 that notifies the presence or absence of a room based on the output from the fire alarm unit 7 and the output of the occupancy detection unit 8 connected to the difference calculation unit 4; Department.

The operation of the above configuration will be explained based on the image schematic diagrams of FIGS. 2 and 3. A background image 10a (in this embodiment, the image capturing unit 1 installed on the ceiling is shown looking into a room where only a table 14h exists) is inputted by the imaging unit 1, and the background image 10a is stored in the background image memory unit 2. to be memorized. Next, the current image 11a is inputted by the imaging section 1, and the current image 11a is stored in the current image memory section 3. After that, in the difference calculation unit 4, the current image 11a and the background image 10 are
Perform the difference calculation of a. In the difference image 12a obtained here, the tables 14h and 14g cancel each other out, and since there is no moving object in the current image 11a, nothing is extracted as a result of the difference calculation. After that, as shown in FIG.
3a appears in the current image 11b, the difference calculation unit 4
A difference image between the current image 11b and the background image 10b is calculated to obtain a difference image 12b. At this time, the table 14h and the table 14g are offset, but the moving object 13a in the current image 11b is
exists, so the moving object 13s is extracted. Difference image 12
b is sent to the room occupancy detection unit 8, the presence of a moving object is detected, and information on the presence of the room is sent to the room occupancy notification determination unit 9a.

At this time, when a fire occurs and a fire occurrence signal is sent from the fire alarm section 7 to the room occupancy alarm determination section 9a, a occupancy signal from the room occupancy detection section 8 is sent to the alarm section 9. is,
The presence of a moving object (human) in the room is displayed. On the other hand, when there is no fire, the occupancy signal from the occupancy detection section 8 is not sent to the notification section 9, so nothing is displayed.

According to the configuration of this embodiment, only a moving object (human) is extracted by performing a subtraction operation on the background image from the current image captured by the imaging unit 1, and as a result, the presence of the detected moving object (human) is detected. Since information is not sent to the notification section 9 when a fire is not occurring, personal privacy can be completely protected. On the other hand, in the event of an emergency such as a fire outbreak, the presence information of the detected moving object (human) is sent to the alarm unit 9, so it is possible to quickly confirm whether there is a person left in the room or not. There is.

FIG. 4 shows a second embodiment of the present invention, which differs from the first embodiment described above in that the room occupancy determination section is composed of an imaging section 1, a moving object extraction section 6, and a room occupancy detection section 8. 9b are installed in large numbers, and the presence/absence information collected by the room occupancy determination section 9b is displayed by lighting the presence/absence LED 9d and absence LED 9e on the display panel section 9c, which indicates the presence/absence of each room. . Figure 4 shows the case where there are 100 rooms.
Indicates that presence/absence information has been collected.

[0014] According to this configuration, the presence or absence of people in each room can be confirmed at a glance, and evacuation and rescue operations can be carried out quickly in the event of a fire.

FIG. 5 shows a flowchart of presence/absence notification in the second embodiment. As a result of the difference calculation, when it is detected that a moving object 13s (human) exists in the Nth room (hereinafter referred to as #N) and there is a fire alarm, the presence L of #N is detected.
Turn on the ED9d and turn off the #N absence LED9e.

Next, as a result of the difference calculation, there is a moving object 1 in the room #N.
When the presence of 3s (human) is detected but there is no fire alarm, the #N occupancy LED 9d is turned off, and the #N absence LED 9e is also turned off.

Furthermore, as a result of the difference calculation, there is a moving object 1 in the room #N.
When it is detected that 3s (human) is not present and there is a fire alarm, the #N occupancy LED 9d is turned off and the #N absence LED 9e is turned on.

Finally, as a result of the difference calculation, when it is detected that there is no moving object 13s (human) in the room #N and there is no fire alarm, the occupancy LED 9d of #N is turned off, and the room LED 9d of #N is turned off.
N's absence LED 9e also goes out.

The above steps are repeated in an infinite loop from 1 to 100. Above occupancy LED 9d, absence LED 9
By controlling the lights on and off, information on the presence and absence of people in each room is always detected, but it is not displayed when there is no fire, so personal privacy is completely protected, and even in the event of a fire emergency. Since the information about the presence or absence of people in each room is displayed promptly, the presence or absence of people in the room can be quickly confirmed.

By the way, there may be cases where the moving object in the room is other than a human being, but it is possible to extract movements and shapes unique to humans from the way the moving object moves and shape, and to ensure the presence or absence of a human by learning with a neurocomputer, etc. It is possible to detect

Therefore, according to the room occupancy notification device of the present invention,
This has the effect of being able to detect whether people are present or absent in a certain area when a fire occurs. In addition, since information on whether a room is occupied or absent is not displayed except when a fire occurs, it has the effect of completely protecting individual privacy.

[0022]

Effects of the Invention As explained above, the room occupancy alarm device of the present invention detects the presence or absence of a moving object from the moving object extracted by the imaging unit, and also uses the detected room occupancy or absence information in case of an emergency such as a fire outbreak. This has the effect of normally protecting the privacy of individuals by displaying the information only, while also being very useful for prompt evacuation guidance and rescue in the event of an emergency.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a number of people informing device according to an embodiment of the present invention.

[Figure 2] Schematic diagram of the image when there are no people in the room using the same device

[Figure 3] Schematic diagram of the image when there is a person in the room using the same device

FIG. 4 is a configuration diagram of a number of people informing device in a second embodiment of the present invention.

[Fig. 5] Flowchart of notification of the number of people in the embodiment of the present invention

[Explanation of symbols]

1 Imaging section 2 Background image memory section 3 Current image memory section 4 Difference calculation section 7 Fire alarm department 8 Occupancy detection unit 9 Notification Department

Claims (1)

[Claims] 1. An imaging section that captures an image of a room; a background image memory section that stores a background image captured by the imaging section; a current image memory section that stores a current image captured by the imaging section; a difference calculation unit that calculates a difference between a background image memory unit and the current image memory unit; a room occupancy detection unit that detects whether there is a person in the room based on the result of the difference calculation unit; a fire alarm section that outputs a fire signal when a fire occurs, and an alarm section that is activated by a signal from the room occupancy detection section only when a fire occurs and a fire signal is received from the fire alarm section. Device.