JPH02196931A - Infrared-ray detection device - Google Patents

Abstract

PURPOSE:To detect the distribution of temperature simultaneously with the existence of a human body and to obtain the comfortable air conditioning effect of an air conditioner by setting the device in a specified space and successively detecting infrared-rays in plural detection areas in the space. CONSTITUTION:The detecting device is set in the specified space 1 so as to successively detect the infrared-rays in the plural detection areas 2 in the space 1. An infrared-ray detecting means 11 consisting of a thermo pile detects the infrared-rays and an infrared-ray condensing means 10 consisting of a Fresnel lens condenses the infrared-rays from the detection areas 2 on the detecting means 11. A scanning means 51 scans the respective detection areas 2 whose light is condensed by the condensing means 10 in the specified space 1. A signal processing means 52 outputs a temperature distribution signal showing the distribution of the temperature in the respective detection areas 2 in the space 1 and a human body position signal showing the position of the existence of the human body based on the output from the detection means 11 and a scanning position by the scanning means 51.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention detects the temperature of a detection area based on the amount of infrared light.
) An infrared detection device that simultaneously detects cloth and the position of a human body.

(Prior Art) Conventionally, as disclosed in, for example, Japanese Patent Laid-Open No. 62-1.75540, an infrared sensor installed in an indoor space is scanned, and the infrared light intensity signal of the infrared sensor and the position at the time of scanning are detected. This system attempts to maintain a uniform temperature distribution in the indoor space by measuring the temperature distribution in the indoor space from the signal and controlling the start/stop of the compressor of the air control button device according to the temperature distribution. This is a known technique.

In addition, as disclosed in the Sharp Corporation catalog "63 Year Home Air Conditioner New Product Information," the infrared rays from the detection area are focused on the thermovanel, which is an infrared sensor, using a Fresnel lens, and the detection area is scanned within the indoor space. There is a known system that attempts to create a comfortable air-conditioned feeling by determining the presence or absence of a human body in each detection area and controlling the operation of an air conditioner according to the human body position signal.

(The problem WJ that the invention seeks to solve) However, in the former of the above conventional ones,
Although it is possible to know the temperature distribution in the indoor space, it is not possible to detect the presence of a human body, so it is not possible to provide comfortable air conditioning that matches the sensations of the human body.

On the other hand, in the latter of the above-mentioned conventional devices, the temperature distribution in the indoor space cannot be determined, and therefore it is difficult to make the temperature in the indoor space uniform.

In other words, all of the above conventional systems do not perform signal processing that fully utilizes the signals of the infrared sensors, so there is a problem that information about the humidity distribution in the air-conditioned space and the presence of a human body cannot be obtained at the same time. there were.

The present invention has been made in view of the above, and its purpose is to simultaneously detect temperature distribution and the presence of a human body by providing means for appropriately processing information obtained from the output signal of an infrared sensor. At the same time, by using the detection signal to control the operation of the air conditioner, the objective is to obtain a comfortable air conditioning effect of the air conditioner.

(Means for Solving the Problem) In order to achieve the above object, the first solution means is installed in a predetermined space (1) as shown in FIG.
) is assumed to be an infrared detection device that sequentially detects infrared rays in a plurality of detection areas (2), . . .

and an infrared detection means (11) for detecting infrared rays;
The infrared! @Infrared condensing means (10) for concentrating infrared rays from the detection area (2) on the detection means (11); a scanning means (51) that scans each detection area (2) 8... in the space (1) based on the output of the infrared detection means (11) and the scanning position by the scanning means (51). , and a signal processing means (52) for outputting a temperature distribution signal indicating the temperature distribution in each detection area (2), and a human body position signal indicating the position of the human body.

In a second solution, the infrared detection means (11) in the second solution is configured with a thermopile that connects thermocouples in series and generates a voltage output depending on the amount of infrared light incident thereon. It is.

As shown in FIG. 1 (not including the dotted line and -dotted chain line portions), the third solution means continuously scans each detection area (2) by using the scanning means (51) in the second solution method. The signal processing means (52) includes a temperature calculation means (53) for converting the infrared light intensity signal of the thermopile into a temperature signal, and each detection area (2) receives the output of the thermopile.

A determining means (54) for determining whether the amount of infrared light in ... is higher than a predetermined threshold; and the determining means (54)
A human body signal output means (55) receives the output of the infrared light and outputs a human body position signal when the infrared light amount is equal to or higher than the threshold value, and receives the outputs of the discrimination means (54) and the temperature calculation means (53) and determines the infrared light amount. The configuration includes a temperature signal output means (56) that outputs a temperature distribution signal when the temperature is lower than a threshold value.

A fourth solution means, as shown in FIG. shall be continuously scanned within a predetermined space, and the signal processing means (
52), a 4 degree calculation means (53) for converting the infrared light amount signal of the thermopile into a temperature signal, and a light amount change calculation means (58) for receiving the output of the thermopile and calculating a change in the amount of infrared light over a predetermined time; a determining means (54) for determining whether the change in the amount of infrared light calculated by the light amount change calculating means (58) is equal to or greater than a predetermined threshold;
Human body signal output means (55) that receives the output of 54) and outputs a human body position signal when the change in light amount is equal to or greater than the threshold value;
Temperature signal output means (56) is provided which receives the outputs of the discrimination means (54) and temperature calculation means (53) and outputs a temperature distribution signal when the change in light amount is lower than a threshold value.

A fifth solution means, as shown in FIG. 1 (not including the dotted line part but including the dashed line part), uses the scanning means (51) in the second solution means to each detection area (2),... The signal processing means (52) includes a temperature calculation means (53) for converting the infrared light amount signal of the thermopile into a temperature signal, and receives the output of the thermopile.
A light amount change calculation means (58) that calculates a change in the amount of infrared light over a predetermined period of time, and whether the change in the amount of infrared light calculated by the light amount change calculation means (58) while the scanning means (51) is stopped is equal to or greater than a threshold value. Discrimination means (5) for discriminating whether
4), human body signal output means (55) which receives the output of the discrimination means (54) and outputs a human body position signal when the change in light amount is equal to or greater than a threshold value, and the discrimination means (54) and temperature calculation means (53). ) and outputs a temperature distribution signal when the light amount change is lower than the threshold value (56).
It has been established that

A sixth solution is one in which the infrared detecting means (11) in the first solution is configured with a pyroelectric sensor made of a surface-charging material and generating a differential output according to a change in the amount of input infrared light. It is.

A seventh solution means, as shown in FIG. 1 (not including the dotted and broken line portions), uses the scanning means (51) in the sixth solution to each detection area (2).

... shall be scanned intermittently, and the signal processing means (5
2) includes a determining means (54) for determining whether a change in the amount of infrared light detected by the pyroelectric sensor while the scanning by the scanning means (51) is stopped is equal to or greater than a threshold; and an output of the determining means (54). human body signal output means (55) that outputs a human body position signal only when the change in light amount is equal to or greater than a threshold value, and a scanning means (55).
Temperature calculation means (53) for calculating the relative temperature of each detection area (2), . The temperature signal output means (56) outputs a temperature distribution signal based on the position signal of the means (51).

The eighth solution is as shown in FIG. 1 (including the dotted line portion). 4th. The signal processing means (52) in the fifth or sixth solution means each detection area (2),...
A threshold value changing means (57) is provided for changing the threshold value so that the lower the average value of the temperature distribution, the lower the threshold value.

A ninth solution is the above-mentioned first solution. 2nd, 3rd. 4th, 5th
．． 6th. The output of the signal processing means (52) in the seventh or eighth solving means is connected to the control device of the air conditioner, and the operating conditions of the air conditioner are controlled according to the temperature distribution signal and the human body position signal. It is composed of

(Function) With the above configuration, in the invention of claim (1), the detection area (2) is scanned in the space (1) by the scanning means (51), and each detection area (2) is scanned by the infrared detection means (11).
), ..., the signal processing means (52) outputs a temperature distribution signal and a human body position signal in the space (1) based on the infrared light amount and the scanning position. .

In other words, by detecting the temperature distribution in the space (1), the information necessary to equalize the temperature distribution in the indoor space (1) can be obtained, and by detecting the human body position, it can be made comfortable according to the human body's experience. Information necessary for air conditioning can be obtained.

In the invention of claim (2), in the invention of claim (1), the thermopile serving as the infrared detection means (11) outputs the amount of infrared light as a voltage signal, and the signal processing means (52) outputs the amount of infrared light as a voltage signal. According to the signal V, a temperature distribution signal and a human body position signal are output.

In the invention of claim (3), in the invention of claim (2), the detection area (2) is continuously scanned in the space (1) by the scanning means (51), and the signal processing means (52 ), the determining means (54) determines whether the infrared light intensity value output from the thermopile is greater than or equal to a preset threshold.If the light intensity is greater than or equal to the threshold, a human body signal is output. The means (55) outputs a human body position signal indicating the presence of a human body and the current scanning position, while if the light amount is lower than the threshold;
Each detection area (2) is detected by the temperature signal output means (56).
A temperature distribution signal of the entire indoor space (1) is outputted from the scanning position and the temperature value calculated by the temperature calculation means (53).

In the invention of claim (4), the scanning means (51) continuously scans each detection area (2), etc., and the light amount change calculating means (58) calculates the infrared rays detected by the thermopile. A change in light amount is calculated based on the light amount signal, and a determining means (54) determines whether the change in light amount is equal to or greater than a threshold value. Then, if the change in light amount is greater than or equal to a predetermined threshold,
A human body signal is output by the human body signal output means (55),
Otherwise, temperature distribution signals are respectively output by the temperature signal output means (56).

Therefore, while continuously scanning the detection area (2), the human body position is detected and the temperature Information on distribution and body position will be obtained.

In the invention of claim (5), the human body signal and the temperature distribution signal are outputted by the same operation as the invention of claim (4).

In that case, the scanning means (51) scans intermittently and detects the presence or absence of a human body based on changes in the amount of light while it is stopped at a certain location. Even under conditions where it is difficult for the temperature to differ from the surface temperature, if there is movement of the human body within the detection area (2), a predetermined peak will appear in the light intensity signal from the thermopile (11), and The presence of a human body is detected regardless of the temperature.

In the invention of claim (6), in the invention of claim (1), one detection area (2) by the scanning means (51)
When the floor surface temperature changes and the amount of infrared light changes during scanning from one detection area to the next detection area (2), a corresponding differential output is generated in the pyroelectric sensor. Therefore, the signal processing means (52) processes the change signal of the amount of infrared light, and obtains a relative temperature distribution signal of each detection area (2), . . . . Furthermore, a human body position signal can be obtained from changes in the amount of infrared light in each detection area (2) when scanning is stopped.

In the invention of claim (sword), as the function of the signal processing means (52) in the invention of claim (6), the determination means (54)
) determines whether the change in the amount of infrared light is equal to or greater than the threshold while the scanning by the scanning means (51) is stopped, and when it is equal to or greater than the threshold, the human body signal output means (55) detects the presence of a human body and its position. A human body position signal notifying the (detection area (2)) is output. Also, temperature calculation means (53)
The relative temperature of each detection area (2), etc. is calculated from the change in the amount of infrared light before and after scanning, and the temperature signal output means (56) calculates the relative temperature of each detection area (2),...
・Temperature distribution signal is output.

In the invention of claim (8), the above claims (3) and (4)
, (5) and (in the operation of the sword invention, the lower the average value of the temperature distribution of each detection area (2), ... output from the temperature calculation means (53) by the threshold value changing means (57), the lower the , the threshold value is changed to be lower than the initial setting value.For example, when the indoor temperature is low enough during cooling operation, by changing the threshold value lower, it is possible to prevent the presence of a human body from being overlooked. When the surface temperature is high, false detection of the presence of a human body is prevented by changing the threshold value to a high value.

In the invention of claim (9), in each of the inventions of claims (1) to (8), the capacity and air volume of the air conditioner are determined according to the human body position signal and the temperature distribution signal, which are the outputs thereof.

The wind direction etc. are controlled, and the effects of each of the above inventions are actually realized in space (1
), the temperature distribution in the space (1) is made uniform, and the temperature, wind direction, etc. are controlled in accordance with the sensations of the human body.

(Example) Hereinafter, an example of the present invention will be described based on the drawings from FIG. 2 onwards.

2 to 8 show a first embodiment according to the invention of claims (1), (2), (3) and (8), and show an indoor space (1).
), (2) is a detection area set in indoor space (1) for detecting temperature distribution and human body position, (
3) is a ceiling-mounted air conditioner for air conditioning the indoor space (1).

In front of the air conditioner (3), the indoor space (1
) has a built-in infrared detection device (4) for detecting infrared rays in the detection area (2).
), as shown in FIGS. 3 to 5, includes a substantially cylindrical lens holder (5) containing an infrared detection section, a substantially rectangular parallelepiped-shaped casing (6) that fixedly supports the lens holder (5),
A U-shaped support frame (7) rotatably supports the casing (6) around a horizontal axis on both sides thereof, and the support frame (7)
), a stepping motor (8) is connected to the central part of the support frame (7) and the lens holder (5) to rotate the entire support frame (7) and the lens holder (5) around a vertical axis, and a controller (9) is connected to the central part of the infrared detection device (4). ).

Here, the lens holder (5) has a structure in which thermal lightning pairs are connected in series, and serves as an infrared detection means that generates a voltage output according to the amount of infrared light input from the detection area (2). The thermopile (11) is provided with a Fresnel lens (10) as an infrared condensing means for concentrating infrared rays in the detection area (2).

FIG. 6 shows the control contents of the controller (9). In step S1, the switch (not shown) of the infrared detection device (4) is turned on, and in step S2, the lens holder (5) is controlled by the stepping motor (8). ) is initialized to set the stop position θ0 of the position signal θ as the initial value of the position signal θ, and in step S3, the stepping motor (8) is driven to rotate the entire lens holder (5) around the vertical axis, and the indoor space ( 1), each detection area (2), . . . is continuously scanned. Next, in steps s4, Ss, and s6, the infrared signal of the thermopile (11) is input, the temperature T is calculated from the infrared signal, and the scanning position θ at that time is read, and then in step S7 , the threshold value Vp for determining the presence or absence of a human body is set as the output value of the thermopile (11) corresponding to a predetermined infrared human power. A new threshold value Vp is determined by changing the reference temperature (a is a constant).

Then, in step S8, it is determined whether the light amount signal V outputted as a voltage value by the thermopile (11) is equal to or higher than the threshold value Vp. While outputting a signal, ■
When is lower than Vp, a temperature distribution signal corresponding to the amount of infrared light is output in step S9.

That is, as shown in FIG. 7, the change in room temperature (curve g in the figure) with respect to the position θ of the detection area (2) is output as a temperature distribution signal, and when the light amount signal ■ is equal to or higher than the threshold value Vp, the presence of a human body is detected. and its position θp are output as a human body position signal. Further, as shown in FIG. 8, by changing the threshold value Vp from the initial value Vpo according to the average value of the temperature T, the detection accuracy according to the background state is maintained. There is.

When the detection of infrared rays in the predetermined sampling period is completed, in step S11, the above control is performed until θ-2nπ, that is, until the indoor space (1) is rotated once,
After one rotation, it is determined in step S+2 whether the switch is on or not. If the switch is not on, the control is terminated, and if it is on, the above control is repeated.

In the above flow, in the inventions of claims (11, (21, (31) and (8)), the stepping motor (8) and step S3 move the detection area (2) into the indoor space (
1), which receives the outputs of the infrared detection means (11) and the scanning means (51) in steps 83 to SIO, and scans the space ( A signal processing means (52) is configured to output the temperature distribution signal and the human body position signal in 1).

Further, in the inventions of claims (3) and (8), the signal processing means (52) receives the output of the infrared detection means (11) in step S5, and converts it into a temperature signal based on the amount of infrared light. A temperature calculation means (53) is configured, and a determination means (54) is configured to determine whether the amount of light from the detection area (2) is equal to or greater than the threshold value Vp in step S8.

Further, step SIO configures a human body signal output means (55) which receives the output of the discrimination means (54) and outputs a human body position signal if the amount of infrared light is equal to or higher than the threshold value Vp. Temperature signal output means (56) is configured to output a temperature distribution signal if the amount of light is lower than the threshold value Vp. Furthermore, claim (8)
In the invention, each detection area (
2).

The lower the average value of the temperature distribution is, the lower the threshold value changing means (57) is configured to change the threshold value Vp.

Therefore, in the invention of claim (1), the scanning means (51
), the detection area (2) is scanned in the indoor space (1), and each detection area (2) is scanned by the infrared detection means (11).
, . . . , the signal processing means (52) outputs a temperature distribution signal in the space (1) and a human body position signal based on the infrared light amount and the scanning position.

In other words, by detecting the temperature distribution in the indoor space (1), the information necessary to equalize the temperature distribution in the indoor space (1) can be obtained, and by detecting the human body position, it can be made comfortable according to the human body's experience. This will allow you to obtain the information necessary to perform proper air conditioning.

In the invention of claim (2), in the invention of claim (1), a thermopile formed by connecting thermocouples in series is arranged as the infrared detection means (11), so that the amount of infrared light is output as a voltage signal. The signal processing means (52) can output a temperature distribution signal and a human body position signal according to the light amount signal V.

Further, in the invention of claim (3), in the invention of claim (2), the scanning means (51) scans the detection area (2).
is continuously scanned in the indoor space (1), and the light amount signal V of the thermopile (11) is converted into a temperature signal T by the temperature calculation means (53) as signal processing by the signal processing means (52). . On the other hand, the determining means (54) determines whether the light amount signal V from the thermopile (11) is equal to or higher than a preset threshold value Vpo. If V is greater than or equal to Vpo, the human body signal output means (55)
As a result, a human body position signal indicating the presence of a human body and the scanning position θp at that time is output, while if V is lower than Vpo, the temperature signal output means outputs a
The scanning position θ of each detection area (2) according to 1) and each detection area (2) calculated by the temperature calculation means (53),
A temperature distribution signal of the entire indoor space (1) is output from the temperature value T of .

Therefore, the invention of claim (2) above can be carried out effectively.

In the invention of claim (8), in the operation of the invention of claim (3), the threshold value changing means (57) adjusts each detection area output from the temperature calculation means (53) as shown in FIG. (2) The lower the average value of the temperature distribution,
The threshold value Vp is a preset value Vp.

will be changed to be lower than For example, as shown in Fig. 15, when the indoor temperature (floor temperature) is sufficiently low during cooling operation, if the threshold value Vp is set low, it may be determined that a human body is not present even though it is present. On the other hand, when the floor surface temperature is high, the threshold value V
Unless p is also set high, there is a risk of false detection in which it is determined that a human body is present when it is not. Therefore, by changing the threshold value Vp in this manner, it is possible to prevent the presence of a human body from being overlooked or erroneously detected as described above, and it is possible to improve the accuracy of human body detection.

Next, regarding the m2 embodiment according to the invention of claim (5),
This will be explained based on FIGS. 11 to 15. In this embodiment as well, the configuration of the apparatus is the same as that shown in FIGS. 2 to 5 of the first embodiment.

FIG. 11 shows the control contents of the controller (9) in the second embodiment. In steps SIS and S16, the same control as in steps sl and s2 in the first embodiment is performed, and then in step SI7 the stop position θ is The lens holder (5) is stopped for a time tl.

Next, in steps S1g, Sag, and Sn, the input of the infrared light amount signal V of the thermopile (11) and the calculation of the difference between the infrared light amount signal V at a predetermined time Δt corresponding to the sampling interval, that is, the infrared light amount change ΔV, and the above-mentioned The infrared light amount signal V is converted into a temperature signal T. Then, in step S21, the threshold value Vp2 for determining the presence of a human body is set to an initial setting value ΔVp corresponding to a predetermined value of the change in the amount of infrared light ΔV.

(C is a constant), and in step 822, the light amount change ΔV is changed to the threshold value ΔVp2 changed above.
Determine whether or not the above is true, and if the determination is YES, step S
23, the human body position signal is determined as N.

If so, temperature distribution signals are outputted in step S24.

That is, as shown in FIG. 12, for example, the lens holder (5) is rotated intermittently every 45° and stopped at the same position for a predetermined period of time, and each detection area (2) at that time,...
・In addition to outputting the temperature distribution as shown in the stepped characteristic line in the figure, in a certain detection area (2) (position θp), while the lens holder (5) is stopped, as shown in enlarged detail in Fig. 13, When the light intensity change ΔV becomes equal to or greater than the threshold value ΔVp2, the presence of a human body and its position θp are output as a human body position signal.

Then, in step S25, the lens holder (5) is rotated by Δθ to change the position θ of the detection area (2) to θ−θ+Δθ.
After updating to step S26. In S27, the same control as in step Sll812 in the first embodiment is performed and the control ends.

In the above flow, in the invention of claim (5), the stepping motor (8) and step S25 constitute a scanning means (51), and steps S+7 to S24 constitute a signal processing means (52).

Further, as the content of the signal processing means (52), step 5
19, the change in the amount of infrared light over a predetermined time is calculated by 17A.
A light amount change calculating means (58) for calculating the temperature is constituted, and a temperature calculating means (53) is constituted by step Sn. Then, in step S22, the light amount change Δ■ is set to the threshold value ΔV
A determining means (54) is configured to determine whether or not the value is equal to or greater than p2. Then, in step S23, the determining means (
human body signal output means (54) which outputs a human body position signal when the light amount change ΔV is equal to or greater than the threshold value ΔVp2;
55) is configured, and in step S24, the light amount change Δ
Temperature signal output means (56) is configured to output a temperature distribution signal when (2) is lower than the threshold value Δvp2. Furthermore, corresponding to the invention of claim (8), step S21
This constitutes a threshold value changing means (57).

Therefore, in the invention of claim (6), the light amount change calculating means (58) calculates the light amount change ΔV based on the infrared light amount signal V detected by the infrared detecting means (11), and the determining means (54) calculates the light amount change ΔV. , the light amount change ΔV is the threshold value ΔVp
It is determined whether the number is 2 or more.

If the light amount change ΔV is equal to or greater than a predetermined threshold value ΔVp2, the human body signal output means (55) outputs a human body signal, and if not, the temperature signal output means (56) outputs a temperature distribution signal.

In that case, the scanning means (51) scans intermittently for 1 m, and the presence or absence of a human body is detected based on the change in light amount ΔV while scanning is stopped. The detection area (2
), a predetermined peak ΔV appears in the light amount signal V from the thermopile (11), as shown in FIG. Therefore, as shown in FIG. 14, the presence of a human body can be detected by setting a threshold value ΔVp2 for light amount change in advance and comparing it with that value. That is,
Even under conditions where the temperature difference between the background and the human body temperature is small and it is difficult to set a threshold value for discrimination based on the infrared light amount value V, there is an advantage that the temperature distribution signal and the human body position signal can be effectively detected.

Next, regarding the third embodiment according to the invention of claim (4),
This will be explained based on FIGS. 9 and 10. In this example,
The configuration of the apparatus is the same as that shown in FIGS. 2 to 5 of the first embodiment. Further, the control content of the controller (9) is as shown in FIG. 11 of the second embodiment described above.
Almost the same control can be achieved by replacing the scanning in 1) with continuous scanning.

In that case, as shown in FIGS. 9 and 10, by detecting the change ΔV in the infrared light amount signal V during a certain period of time Δt during scanning and comparing the value ΔV with a predetermined threshold ΔVpl, the detection area ( 2) It becomes possible to detect temperature distribution and human body position while continuously scanning.

Next, a fourth embodiment according to the invention of claims (6), (7) and claim (8) will be described. This example is based on the above-mentioned 1. A pyroelectric sensor is used instead of the thermopile (11) as the temperature detection means in the second embodiment.

FIG. 16 and FIG. 17 schematically show the infrared detection device (4') in this embodiment, and (12) is a support member for attaching the entire device, and the inside center of the support member (12) is A pyroelectric sensor (11') as infrared detection means is attached.

The pyroelectric sensor (11') is made of piezoelectric crystals such as glycine sulfate and lead titanate, and uses changes in surface charge due to temperature changes, that is, pyroelectric phenomenon, to generate a differential output in response to changes in infrared input. It is something to do. And (13) is
A P plate (10) installed to fixedly support the pyroelectric sensor (11') and for processing the output signal of the pyroelectric sensor (11') is attached to the front end of the support member (12). A multi-segment Fresnel lens (14
) is provided inside the Fresnel lens (lO) and below the pyroelectric sensor (11'), and
A shielding plate (15) is provided above the shielding plate (14), and the shielding plate (15) has an opening (14a) corresponding to one portion of the eight divisions of 0). This is an ultrasonic motor for rotational driving inside the machine.

In other words, tli18v! As shown in J, the indoor space (
In 1), circular detection areas (2), ... are set concentrically every π/4 from the center of the floor surface, and the shielding plate (14) is intermittently moved by the ultrasonic motor (15). By rotating the opening (14a) by π/4 and aligning the opening (14a) with the corresponding part of the Fresnel lens (10), each detection area (2) is set in each indoor space (1). 8・
While scanning ... intermittently, the temperature TN (N-1 to N-8) of each detection area (2), ... is detected based on the voltage change of the pyroelectric sensor (11') before and after scanning. It is done like this.

FIG. 19 shows the $ control contents of the controller (9) in this embodiment, and in steps 531) and S31, steps Sl and S! in the first embodiment are performed. Perform the same control as
In step S32, the human body detection mode is entered.

That is, the shielding plate (14) is opened and stopped at the stop position θ at the time t1. Next, in step 833, the pyroelectric sensor (11'
) is input, and in step 834, the threshold value Δvp3 for determining human body detection is set to an initial value ΔVp based on the formula %) (where d is a positive constant).
In step S35, it is determined whether the light amount change ΔV is equal to or greater than the threshold value Δvp3.

If the light amount change ΔV is equal to or greater than the threshold value ΔVp3, a human body position signal is output in step S3B, while the light amount change ΔV is
If V is lower than the threshold value ΔVp3, leave it as is and step 83? Go to and set the temperature distribution detection mode. That is, the lens holder (5) is rotated for a predetermined period of time [2] until its rotational position θ changes from the previous θ to (θ + Δθ). Here, the predetermined time t2 is the pyroelectric sensor (11'
) is determined from the characteristics of changes in surface charge caused by changes in the amount of light.

Then, in step S38, the relative temperature T of the new detection area (2) is calculated as follows from the change in the amount of light accompanying the movement of the detection area (2).

For example, as shown in the upper part of Figure 21, when moving from the first detection area (2) to the next detection area (2), the floor temperature changes from TI to T2, and the amount of infrared light increases a (T
2-TI ) ((Z is a predetermined constant), the pyroelectric sensor (11) will have a differential output V as shown in the lower part of the figure.
2-1 occurs. Similarly, as shown in the upper and lower diagrams of Figure 22, when moving to the next detection area (2), the differential output V according to the change in the amount of infrared light (T3 Tz)
3-2 occurs. Therefore, as shown in FIG.
The rotation angle of the stepping motor (8) is π/4. π/2
,... 2π and stop time 1. When the infrared input changes as shown in the above figure, a step-like output change is obtained as shown in the lower figure.

In other words, each detection area (2
),...floor surface temperature T,,T! If there is a distribution of ,..., a change in the infrared human power αT as shown in the figure below will occur during scanning, and by sequentially increasing or decreasing the value of the change from the reference value, the floor surface temperature as shown in the figure below will occur. Distribution value V2-1,
V3-2, . . . are calculated.

Then, in step S39, a floor surface temperature distribution signal indicating the temperature distribution of each detection area (2), . . . is generated based on the floor surface temperature distribution value of each detection area (2), . Output.

When the detection of infrared rays in the predetermined sampling period is completed, in step 54], the above control is performed until θ-2nπ, that is, one round of the indoor space (1) is completed.
If the switch is turned on, it is determined in step S41 whether or not the switch is on, and if it is not on, the control is ended, and if it is on, the control is repeated.

In the above flow, in the invention of claims (6) and (7), the scanning means (51) is constituted by the shielding plate (14), the ultrasonic motor (15), and step S37, and steps S32 to S36 and S33. S39 constitutes a signal processing means (52). Further, the contents of the signal processing means (52) include step S, Sys,
S33. 839. By S34, the temperature calculation means (53), the discrimination means (54), and the human body signal output means (55
), temperature signal output means (56), threshold value changing means (57)
are each configured.

Therefore, in the invention of claim (6), since the pyroelectric sensor (11') is arranged as the infrared detection means, each detection area (
2), ... is scanned, the input of infrared rays changes according to the difference in floor surface temperature before and after scanning, and the pyroelectric sensor (1)
1'), a differential output is generated accordingly. Furthermore, when scanning is stopped, the presence of a human body in the detection area (2) causes the infrared input value to change, so that the pyroelectric sensor (11') generates a differential output corresponding to the input change.

Therefore, the signal processing means (52) causes the scanning means (
51), the relative temperature of each detection area (2), . . . is sequentially detected, and based on the data, a temperature distribution signal is output, and a human body position signal is output.

Further, in the invention of claim (7), as the function of the signal processing means (52) of the invention of claim (6), the discriminating means (5
4), it is determined whether the change in the amount of infrared light ΔV is equal to or greater than the threshold value ΔVp3 while the scanning means (51) is stopped;
When the threshold value ΔVp3 or more, the human body signal output means (55
), the presence of a human body and its location (detection area (2))
A human body position signal that notifies the user is output. Further, the temperature calculation means (53) calculates the relative temperature of each detection area (2), etc. from the change in the amount of infrared light before and after scanning, and the temperature signal output means (56) calculates the relative temperature of each detection area (2). 2), ... temperature distribution signals are output. Therefore, such information regarding the position of the human body and temperature distribution can be used for air conditioning, and the same effect as the invention of claim (5) above can be obtained.

In the invention of claim (8), which corresponds to the invention of claim (7), the threshold value changing means (58) changes the threshold value ΔVp3 to become lower as the average value of the floor surface temperature becomes lower. As in the case of inventions (3) to (5),
This will improve human body detection accuracy.

Next, the invention of claim (9) will be explained. Claim (9
), in each of the inventions of claims (1) to (8) above, the human body position signal and the temperature distribution signal, which are the outputs thereof, are connected to a control device (not shown) of the air conditioner (3). And the air conditioner according to its signal! (3) The capacity, air volume, air direction, etc. are controlled. Therefore, the effects of the above-mentioned inventions are actually used for air conditioning of the indoor space (1) to equalize the distribution of warm melon in the indoor space (1) and to control the temperature, wind direction, etc. in accordance with the human body's bodily sensations. Therefore, it is possible to create a comfortable air-conditioned space.

In addition to the thermopile and pyroelectric sensor in each of the above-described embodiments, a thermistor-type sensor that utilizes resistance change such as InSb or CdHg can be used as the infrared detection means in the present invention.

Further, the infrared condensing means is not limited to the Fresnel lens as in the above embodiment, but it goes without saying that a normal lens, a multi-parabolic mirror, etc. can be used.

(Effects of the Invention) As explained above, according to the infrared detection device of the invention of claim (1), a plurality of detection areas are set within an indoor space, and each detection area is sequentially scanned within the indoor space. The infrared rays from each detection area are detected by the infrared detection means, and based on the scanning position and the infrared signal, a human body position signal indicating the presence of a human body and its position, and a temperature distribution signal indicating the temperature distribution in each detection area are output. Since the signal processing is performed, it is possible to use the signal to provide information for making the temperature distribution of the indoor space uniform and performing air conditioning that adapts to the human body's bodily sensations.

According to the invention of claim (2), since the infrared detection means in the invention of claim (1) is constituted by a thermopile, the amount of infrared light can be controlled by converting the infrared input from each detection area into a voltage signal. Detect effectively. Therefore, the effect of the invention of claim (1) can be obtained.

According to the invention of claim (3), in the invention of claim (2), each detection area is continuously scanned,
Based on the infrared light intensity signal in each detection area, when the light intensity is above a predetermined threshold, a human body position signal indicating the location of the human body is output, and when the infrared light intensity is lower than the threshold, a temperature distribution signal of each detection area is output. Therefore, useful human body signals and temperature distribution signals can be obtained, and the effect of the invention of claim (2) as described above can be obtained more markedly.

According to the invention of claim (4), in the invention of claim (a), each detection area is continuously scanned, and
A human body signal is output when the change in the amount of infrared light within a predetermined time during scanning is greater than a predetermined threshold, and a temperature distribution signal is output when the change in the amount of light is lower than the threshold.
Even under conditions where the floor surface temperature of each detection area is close to the human body temperature and it is difficult to determine the presence or absence of a human body from the infrared light intensity signal value, the effect of the invention of claim (2) above can be effectively obtained. .

According to the invention of claim (5), in the invention of claim (2), each detection area is intermittently scanned, and
When the change in the amount of infrared light while stopped in each detection area is above a predetermined threshold, a human body position signal is output, and when it is lower than the threshold, a temperature distribution signal is output, so that when the floor surface temperature is close to the human body temperature, a light amount value is output. Accordingly, the presence of a human body can be effectively detected even in cases where it is difficult to determine the presence or absence of a human body, and therefore, the effect of the invention of claim 2 can be effectively obtained.

According to the invention of claim (6), in the invention of claim (1), the infrared II detection means is constituted by a pyroelectric sensor, so that the change in light amount when moving from each detection area to the next detection area is prevented. You can find out the relative temperature difference between each detection area by testing. Furthermore, since the presence of a human body can be known from the light amount change signal, useful human body position signals and temperature distribution signals can be output, and the same effect as the invention of claim (a) can be obtained.

According to the invention of claim (7), in the invention of claim (6), the scanning of each detection area detects the temperature distribution while moving, and detects the position of the human body while stopped in one detection area. This makes it possible to effectively utilize the characteristics of the pyroelectric sensor to achieve the effect of the invention of claim (6).

According to the invention of claim (8), the above claim (3), (
4).

In the inventions (5) and (7), since the threshold value is lowered as the average value of the temperature distribution of each detection area is lower, it is possible to improve human body detection accuracy.

According to the invention of claim (9), the signals obtained in each of the above inventions are connected to the control device of the air conditioner, and the operation of the air conditioner is controlled based on the signal. It is possible to equalize the temperature distribution and provide comfortable air conditioning that matches the sensations of the human body.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of the present invention. Fig. 2 and the following diagrams show embodiments of the present invention, Figs. 1 to 5 show the configuration of the infrared detection device in the first to third embodiments, and Fig. 2 schematically shows the state of the indoor space. Perspective view, 3rd
The figure is a perspective view showing the overall configuration of the infrared detection device, FIG. 4 is a side view of the lens holder, FIG. 5 is a plan view thereof, FIGS. 6 to 8 show the first embodiment, and FIG. Flowchart diagram showing the control content of the controller, FIG. 7 is a characteristic diagram showing the relationship between the sensor output signal and the threshold value of the first embodiment, FIG. 8 is a characteristic diagram showing the method of changing the threshold value, and FIGS. 9 and 10. The figure is the third
9 is a characteristic diagram showing the relationship between the sensor output signal and the scanning position, FIG. 10 is a characteristic diagram showing the relationship between the change in the amount of infrared light and the threshold value, and FIGS. Fig. 11 is a flowchart showing the control contents of the controller, Fig. 12 is a characteristic diagram showing the relationship between the sensor output signal and the scanning position, and Fig. 13 shows the method of detecting a human body by changing the amount of light. Fig. 12 is a partially enlarged view, Fig. 14 is a characteristic diagram showing the relationship between light amount change and threshold value, Fig. 15 is an explanatory diagram showing the effect of changing the threshold value, and Figs.
FIG. 16 is a side view showing the overall configuration of the infrared detection device, FIG. 17 is a plan view of the same, FIG. 18 is an explanatory diagram showing the setting of the detection area in an indoor space, and FIG. Figure, middle mouth. The lower figure is a characteristic diagram showing the floor temperature, pyroelectric sensor input signal, and floor temperature distribution signal for each scanning position, and the upper and lower figures in Figures 21 and 22 show the infrared rays of the detection area before and after scanning. An explanatory diagram that sequentially shows changes in input and the resulting differential output of the pyroelectric sensor. The upper and lower diagrams in FIG. 23 show changes in the amount of infrared light in each detection area with respect to the scanning position. FIG. 3 is a characteristic diagram showing the outputs of the pyroelectric sensors. (1)... Indoor space, (2)... Detection area, (1
0) ... Fresnel lens (infrared condensing means), (11
)...Thermopile (infrared detection means), (11')
...Pyroelectric sensor (infrared detection means), (51)...
Scanning means, (52)...Signal processing means, (53)...
・Temperature calculation means, (54)...discrimination means, (55)・
-Human body signal output means, (56)...Temperature signal output means, (57)...Threshold value changing means, (58)...Light amount change calculation means. Fig. 1 Fig. 3 Fig. Pile) Fig. 5 Fig. 4 Fig. Fig. 1-/αcii information Fig. 7 Fig. 18 Fig. 16 Fig. 17 Fig. 21 Fig. 22 Fig. 20 Fig. Motor rotation angle wide e

Claims (9)

[Claims] (1) An infrared detection device that is installed in a predetermined space (1) and sequentially detects infrared rays in a plurality of detection areas (2), ... in the space (1), an infrared detection means (11) for detecting infrared rays, an infrared condensing means (10) for concentrating infrared rays from the detection area (2) on the infrared detection means (11), and the predetermined space (1).
scanning means (51) for scanning each detection area (2), ... focused by the infrared light focusing means (10) within the infrared light focusing means (10);
), a signal that outputs a temperature distribution signal indicating the temperature distribution in each detection area (2), . . . in the space (1) and a human body position signal indicating the position of the human body. An infrared detection device comprising a processing means (52). (2) Claim (1) characterized in that the infrared detecting means (11) is a thermopile formed by connecting thermocouples in series and generating a voltage output according to the amount of incoming infrared light.
The infrared detection device described. (3) The scanning means (51) has each detection area (2),...
The signal processing means (52)
includes a temperature calculation means (53) that converts the infrared light amount signal of the thermopile into a temperature signal, and receives the output of the thermopile and determines whether the infrared light amount in each detection area (2), . . . is higher than a predetermined threshold value. Discrimination means (5) for determining whether
4), human body signal output means (55) which receives the output of the discrimination means (54) and outputs a human body position signal when the amount of infrared light is equal to or higher than the threshold value, and the discrimination means (54) and temperature calculation means ( Claim (2) characterized in that the temperature signal output means (56) receives the output of (53) and outputs a temperature distribution signal when the amount of infrared light is lower than a threshold value.
The infrared detection device described. (4) The scanning means (51) has each detection area (2),...
The signal processing means (52) includes a temperature calculation means (53) that converts the infrared light amount signal of the thermopile into a temperature signal, and a temperature calculation means (53) that receives the output of the thermopile and converts the infrared light amount signal into a temperature signal. A light amount change calculating means (58) for calculating a change in light amount over a predetermined time; and a determining means (54) for determining whether the change in infrared light amount calculated by the light amount change calculating means (58) is equal to or greater than a predetermined threshold value. and human body signal output means (5) which receives the output of the discrimination means (54) and outputs a human body position signal when the change in light amount is equal to or greater than the threshold value.
5), the discrimination means (54) and the temperature calculation means (53).
2. The infrared detection device according to claim 2, further comprising temperature signal output means (56) which receives the output of the infrared ray detector (56) and outputs a temperature distribution signal when the change in light amount is lower than a threshold value. (5) The scanning means (51) has each detection area (2),...
The signal processing means (52)
includes a temperature calculation means (53) for converting the infrared light amount signal of the thermopile into a temperature signal, a light amount change calculation means (58) for receiving the output of the thermopile and calculating a change in the amount of infrared light over a predetermined time, and a scanning means ( determining means (54) for determining whether or not the change in the amount of infrared light calculated by the light amount change calculating means (58) is equal to or greater than a threshold value while the scanning is stopped by step 51); , a human body signal output means (55) that outputs a human body position signal when the change in light amount is equal to or more than a threshold value, and outputs from the above-mentioned discrimination means (54) and temperature calculation means (53), and when the change in light amount is lower than the threshold value; Temperature signal output means (
56). The infrared detection device according to claim (2). (6) Claim (1) characterized in that the infrared detecting means (11) is a pyroelectric sensor made of a surface-chargeable material and generating a differential output according to a change in the amount of input infrared light.
The infrared detection device described. (7) The scanning means (51) has each detection area (2),...
The signal processing means (52)
includes a determining means (54) for determining whether a change in the amount of infrared light detected by the pyroelectric sensor is equal to or greater than a threshold while scanning by the scanning means (51) is stopped; , a human body signal output means (55) that outputs a human body position signal only when a change in light amount is equal to or greater than a threshold value, and a scanning means (51).
temperature calculation means (53) that calculates the relative temperature of each detection area (2), . . . from changes in the amount of infrared light before and after scanning by the temperature calculation means (53); 7. The infrared detection device according to claim 6, further comprising temperature signal output means (56) for outputting a temperature distribution signal based on the position signal of step 51). (8) The signal processing means (52) each detection area (2),
Claims (3), (4), (5), or (7) further comprising a threshold value changing means (57) that changes the threshold value so that the lower the average value of the temperature distribution is, the lower the threshold value is. The infrared detection device described. (9) The output of the signal processing means (52) is connected to a control device of the air conditioner, and the operating conditions of the air conditioner are controlled according to the temperature distribution signal and the human body position signal. (1), (2), (3), (4), (5),
The infrared detection device according to (6) or (7).