JP2707382B2 - Indoor information detection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indoor information detecting apparatus used in an air conditioner or the like to detect the indoor volume, floor, wall temperature, etc. from indoor two-dimensional thermal image data.

[0002]

2. Description of the Related Art In an air conditioner, for example, by controlling the temperature, the air volume, and the wind direction using information such as the volume of the room, the floor, and the wall surface temperature, it is possible to further enhance the comfort of the person in the room. It is possible to automatically perform comfortable air-conditioning operation. Such information can also be used as room information of a fan heater or the like that controls the room temperature with warm air.

In the case of detecting room volume, floor and wall temperatures using two-dimensional thermal image data detected by a pyroelectric infrared sensor, conventionally, image data read from an image input device is compared with image data. In general, a method of performing processing and image recognition to detect a boundary between a wall and a floor in a room and then obtaining the boundary is used.

FIG. 4 is a block diagram showing a configuration of a conventional indoor information detecting device. In FIG. 4, reference numeral 61 denotes image input means for detecting a two-dimensional infrared thermal image, 601 denotes thermal image data, 62 denotes thermal image data storage means, 602 denotes stored thermal image data, 63 denotes edge and line detection means, 60
Numeral 3 denotes line image data, numeral 64 denotes an indoor wall / floor boundary calculating means, numeral 604 denotes indoor characteristic data, and numeral 65 denotes an indoor volume, floor and wall temperature calculating means.

Next, the operation of the above conventional example will be described.
Thermal image data 601 detected by the image input unit 1
Are stored in the thermal image data storage means 62. The stored thermal image data 602 is used for the edge and line detecting means 63.
Is converted into line image data 603 by The line image data 603 is obtained by the indoor wall / floor boundary calculating means 64.
It is used to calculate the position of a wall or a floor in the two-dimensional thermal image data, and from the calculated information and the thermal image data 605 stored in the thermal image data storage means 62, the volume and floor of the room,
Calculation of the wall surface temperature is performed.

[0006]

However, in the above-described conventional indoor information detecting device, when the boundary between the wall surface and the floor cannot be well calculated from the two-dimensional infrared thermal image data,
As a result, the positions of walls and floors cannot be accurately calculated, and it is difficult to calculate unknown indoor walls and floors from the calculated line image data, even as a problem of pattern recognition processing. was there.

The present invention has been made in view of such a conventional problem,
It is an object of the present invention to provide an excellent indoor information detecting device that can easily calculate the volume, floor, and wall surface temperature of a room by effectively using information of a person in the room.

[0008]

According to the present invention, there is provided an image input means for detecting two-dimensional thermal image information in a room, a thermal image data storage means, and a human area detecting means. Means for calculating a representative point indicating the position of a person, storage means for cumulatively storing the representative point, room volume and indoor floor, wall position detecting means, and floor and wall temperature calculating means. It is provided.

[0009]

According to the present invention, a two-dimensional infrared image (thermal image) can be obtained by utilizing the fact that, by detecting thermal image data in a room, the position of a person in the room can be easily detected from a threshold value of heat. ) Calculate the position of the person from the data, accumulate and store the movement range of the position of the person, calculate the position of the wall and floor in the room from the information, and calculate the position of the room from the position of the wall and floor and the thermal image data. Since the volume, the floor, and the wall surface temperature are detected, the room volume, the floor, and the wall surface temperature can be calculated more accurately and easily.

[0010]

An embodiment of the present invention will be described below.
FIG. 1 shows a configuration of an indoor information detecting device according to an embodiment of the present invention. In FIG. 1, 1 is image input means for detecting two-dimensional thermal image information in a room, 2 is thermal image data storage means for storing obtained thermal image data, and 3 is a human image on the stored thermal image data. A human area detecting means for detecting an area, a representative point detecting means for detecting a representative point indicating a position of a human area, and a representative point accumulating means for storing detected representative points and accumulating representative points from the past. Storage means, 6 is a position detecting means for detecting the volume of the room and the position of the floor and wall in the room from the accumulated representative points, 7 is the volume of the obtained room, 8 is the position of the obtained floor and wall. , A floor and wall surface temperature calculating means for detecting the temperature of the floor and the wall surface, and 9 is the obtained indoor floor and wall surface temperature.

The image input means 1 is a device for reading two-dimensional infrared image data using a pyroelectric infrared sensor. Further, the image input unit 1 is assumed to be installed in a general household room, and it is assumed that the entire floor surface of the room can be read in the image data, and the installed height from the floor surface is constant. . For example, when this device is built in an air conditioner, it is installed at a height of approximately 2 m.

Next, the operation of the above embodiment will be described.
The two-dimensional thermal image data 101 read by the image input unit 1 is temporarily stored in the thermal image data storage unit 2. The stored thermal image data 102 is input to the human area detecting means 3 and detects a human area based on the temperature value indicated by each pixel. For example, if there is no non-human heat source in the room and the non-human room temperature is 25 ° C. or less,
By detecting the temperature range from 26 ° C to 34 ° C,
A human area can be detected. It should be noted that this region cutout temperature can be calculated by a method of calculating from the histogram distribution of the pixel values of the thermal image data 102, or by using both edge detection and the cutout temperature.

The signal 103 indicating the human area thus detected is converted into a signal 104 indicating the representative point of the human area by the representative point detecting means 4, and the representative point is stored by the representative point accumulating means 5. It is accumulated and stored. Assuming that there are n pixels representing a human region, the representative points use the coordinates X and Y of the center of gravity calculated from the temperature value and position in the region as shown below.

[0014]

(Equation 1) Here, An is the temperature value of the pixels X1 and Y2.

Also, the coordinates of the pixel closest to the floor surface or the coordinates of the pixel farthest from the floor surface may be used so that the calculation is reduced as the representative point.

When the above processing is repeated many times, the representative point accumulation storage means 5 indicating the position of the person stores information indicating the moving range of the person in the room. In ordinary households, the outer periphery of this movement range is considered to indicate the size of the floor in the room. When the accumulated memory is almost equal to the size of the indoor floor, the signal 105 indicating the outer periphery of the moving range of the representative point is passed to the indoor volume and indoor floor and wall position detecting means 6, The room volume 7 is determined. Also, the indoor floor surface output from the position detection means 6,
From the signal 106 indicating the position of the wall surface and the indoor thermal image data 108 stored in the thermal image data storage means 2, the floor,
The wall surface temperature calculating means 8 outputs a floor / wall surface temperature signal 109 to calculate the indoor floor / wall surface temperature 9.

Next, the procedure of thermal image processing will be described with reference to FIG. 2 in correspondence with the block diagram shown in FIG. 2, reference numeral 10 denotes a thermal image stored in the thermal image data storage means 2, which corresponds to the thermal image data 102 in FIG. The thermal image 10 has a region cut out in a human cut-out temperature range, and corresponds to the signal 103 in FIG.
Becomes Reference numeral 12 denotes a thermal image 12 indicating a representative point indicating the position of a human area in the thermal image 11, and corresponds to the signal 104 in FIG. Reference numeral 13 denotes a thermal image in which representative points of a human area in a room are accumulated and stored, and corresponds to the signal 105 in FIG. From the thermal image 13, a region of a representative point as shown by a hatched portion of the thermal image 14 is obtained, and as shown in the thermal image 15, it is possible to roughly estimate the position of the floor or wall surface in the room. Then, the temperature of the floor or the wall surface is calculated from the thermal image 15 corresponding to the signal 106 and the thermal image data 10 corresponding to the signal 108 in FIG.

Next, the procedure for calculating the room volume 7 will be described with reference to FIG. Two examples (a), (b), and (c) of the thermal image 14 showing the area of the representative point in FIG. 2 are shown. For each of (a), (b), and (c), first, the area of the representative point is detected, then the area of the floor and each wall surface in the room is calculated, and from this, the volume of the room in a general household is calculated. As for the order, based on (a), (b) calculates the difference in depth, and (c) calculates the room volume based on the difference in depth and width.

[0019]

As described above, according to the present invention, a human area is detected from two-dimensional thermal image data, and the size and temperature of a room are obtained from the cumulative value of points representing the human area. In addition, it is possible to more accurately and easily calculate the volume of a room and the temperatures of floors and walls in a room. Therefore, by incorporating the present invention into a device such as an air conditioner or a fan heater that requires room information, the comfort of a room person can be further improved, and a comfortable air-conditioning operation can be automatically performed. .

[Brief description of the drawings]

FIG. 1 is a block diagram of an indoor information detecting apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a thermal image processing procedure in the apparatus.

FIG. 3 is a schematic diagram showing a procedure for calculating the volume of a room in the apparatus.

FIG. 4 is a block diagram of an indoor information detection device showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Image input means 2 Thermal image data storage means 3 Human area detection means 4 Representative point detection means 5 Representative point accumulation storage means 6 Indoor volume and indoor floor and wall position detection means 7 Indoor volume 8 Floor, wall temperature Calculation means 9 Indoor floor and wall temperature

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor ▲ Yoshi ▼ Kunio Tada 3-10-1, Higashi Mita, Tama-ku, Kawasaki City, Kanagawa Prefecture Inside Matsushita Giken Co., Ltd. (72) Inventor Ikuo Akamine Kadoma City, Osaka Prefecture 1006 Oji Kadoma Matsushita Electric Industrial Co., Ltd. (72) Inventor Makoto Shimizu 1006 Oji Kadoma, Kadoma City, Osaka Pref. Matsushita Electric Industrial Co., Ltd. (72) Inventor Katsuhiko Fujiwara 1006 Okadoma Kadoma, Osaka Prefecture Address Matsushita Electric Industrial Co., Ltd. (56) References JP-A-2-197747 (JP, A) JP-A-2-115702 (JP, A) JP-A-64-53287 (JP, A) JP-A-2 −68438 (JP, A)

Claims (5)

(57) [Claims] 1. An image input means for detecting two-dimensional thermal image information in a room; a thermal image data storage means for storing thermal image data obtained from the image input means; Human area detecting means for detecting a human area, representative point detecting means for detecting a representative point indicating the position of a human area, and representative points for storing detected representative points and accumulating representative points from the past Cumulative storage means, the volume of the room and the floor of the room from the storage contents of the representative point cumulative storage means,
An indoor information detection device comprising: a position detection unit that detects a position of a wall surface. 2. A floor / wall surface temperature calculating means for calculating the temperature of the indoor floor / wall surface from the floor / wall position information obtained from the position detecting means and the thermal image data obtained from the thermal image data storing means. The indoor information detecting device according to claim 1, further comprising: 3. The indoor information detecting device according to claim 1, wherein the representative point of the position of the human area is the center of gravity of the heat temperature value in the area. 4. The indoor information detecting apparatus according to claim 1, wherein the representative point of the position of the human area is a pixel closest to the floor of the area. 5. The indoor information detecting apparatus according to claim 1, wherein the representative point of the position of the human area is a pixel farthest from the floor of the area.