JPH0675011B2 - Infrared detector - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an infrared detection device that simultaneously detects a temperature distribution and a human body position in a detection area based on the amount of infrared light.

(Prior Art) Conventionally, for example, as disclosed in Japanese Patent Laid-Open No. 62-175540, an infrared sensor installed in an indoor space is scanned, and an infrared light amount signal of the infrared sensor and a position signal during scanning are provided. It is a known technique to determine the temperature distribution in the indoor space from the above, and to control the start / stop of the compressor of the air conditioner according to the temperature distribution to keep the temperature distribution in the indoor space uniform. .

In addition, as disclosed in Sharp's catalog “New Home Air Conditioner Product Information for 1988”, infrared rays from the detection area are collected by a Fresnel lens on a thermopanel, which is an infrared sensor, and the detection area is scanned inside the room. Then, it is known that the presence or absence of a human body in each detection area is determined and the operation of the air conditioner is controlled in accordance with the human body position signal to generate a comfortable air conditioning feeling.

(Problems to be Solved by the Invention) However, in the former one of the above-mentioned conventional ones,
Since it is possible to know the temperature distribution in the indoor space, but it is not possible to detect the presence of the human body, it is not possible to perform comfortable air conditioning that matches the sensation of the human body.

On the other hand, in the latter of the above-mentioned conventional ones, it is not possible to measure the temperature distribution in the indoor space, and in the above-mentioned conventional ones, since signal processing sufficiently utilizing the signal of the infrared sensor is not performed, There is a problem that it is not possible to simultaneously obtain information about the temperature distribution in the air-conditioned space and the presence of the human body.

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

(Means for Solving the Problem) In order to achieve the above-mentioned object, a first solving means is installed in a predetermined space (1), and a plurality of detection areas (2), ... It is premised on an infrared detection device that sequentially detects infrared rays. Then, an infrared detecting means (11) consisting of a thermopile, which is formed by connecting thermocouples in series and generates a voltage output according to the amount of infrared light received and detects infrared rays, and the infrared detecting means (11) is provided with Infrared light collecting means (10) for collecting infrared light from the detection area (2), and each detection area (2) collected by the infrared light collecting means (10) in the predetermined space (1), Based on the scanning means (51) that continuously scans the infrared ray detecting means (11) and the scanning position of the scanning means (51), each detection area (2) in the space (1) , And signal processing means (52) for outputting a temperature distribution signal indicating a temperature distribution at the human body position signal indicating a human body position. Further, the signal processing means (52) receives temperature output from the thermopile and the temperature calculation means (53) for converting the infrared light quantity signal of the thermopile into a temperature signal, and the infrared light quantity in each detection area (2) ,. A discriminating means (54) for discriminating whether or not it is higher than a threshold, and the discriminating means (54)
In response to the output of the human body signal means (55) for outputting a human body position signal when the infrared light quantity is equal to or more than the threshold value, and the outputs of the discrimination means (54) and the temperature calculation means (53), the infrared light quantity is the threshold value. And a temperature signal output means (56) for outputting a temperature distribution signal when the temperature is lower than that.

The second solving means is premised on an infrared detection device which is installed in a predetermined space (1) and sequentially detects infrared rays of a plurality of detection areas (2), ... In the space (1). . Then, an infrared detecting means (11) consisting of a thermopile, which is formed by connecting thermocouples in series and generates a voltage output according to the amount of infrared light received and detects infrared rays, and the infrared detecting means (11) is provided with Infrared light collecting means (10) for collecting infrared light from the detection area (2), and each detection area (2) collected by the infrared light collecting means (10) in the predetermined space (1), Based on the scanning means (51) for continuously scanning the scanning area, the output of the infrared detecting means (11) and the scanning position of the scanning means (51), the detection areas (2) in the space (1), There is provided a signal processing means (52) for outputting a temperature distribution signal indicating a temperature distribution in the ... And a human body position signal indicating a human body existing position. Further, the signal processing means (52) includes a temperature calculating means (53) for converting the infrared light amount signal of the thermopile into a temperature signal and a light amount change calculating means for receiving the output of the thermopile and calculating a change in the infrared light amount at a predetermined time. (58), a discriminating means (54) for discriminating whether or not the change of the infrared light amount calculated by the light amount change calculating means (58) while the scanning by the scanning means (51) is stopped is a threshold value or more; The human body signal output means (55) which receives the output of the means (54) and outputs the human body position signal when the light amount change is equal to or more than the threshold value, and the outputs of the discrimination means (54) and the temperature calculation means (53). , Temperature signal output signal that outputs temperature distribution signal when light intensity change is lower than threshold value (56)
It is composed of and.

The third solving means is premised on an infrared detection device which is installed in a predetermined space (1) and sequentially detects infrared rays of a plurality of detection areas (2), ... In the space (1). . Then, an infrared detecting means (11) comprising a thermopile for connecting a thermocouple in series to generate a voltage output according to the amount of infrared light received and detecting infrared rays, and the detection area in the infrared means (11). An infrared light collecting means (10) for collecting the infrared light from (2) and each detection area (2), which is collected by the infrared light collecting means (10) in the predetermined space (1), are provided. A scanning means (51) for intermittently scanning,
Based on the output of the infrared detecting means (11) and the scanning position of the scanning means (51), a temperature distribution signal indicating a temperature distribution in each detection area (2) in the space (1) and a human body. And a signal processing means (52) for outputting a human body position signal indicating the existing position. Furthermore, the signal processing means (5
2), a temperature 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 the change of the infrared light amount in a predetermined time, and scanning. A discriminating means (54) for discriminating whether or not the change of the infrared light amount calculated by the light amount change calculating means (58) during the stop of the scanning by the means (51) is a threshold value or more, and the output of the judging means (54) In response to the output of the human body signal output means (55) that outputs a human body position signal when the light quantity change is equal to or greater than the threshold value, and the outputs of the determination means (54) and the temperature calculation means (53), the light quantity change is higher than the threshold value. And a temperature signal output means (56) for outputting a temperature distribution signal when the temperature is low.

The fourth solving means is premised on an infrared detection device which is installed in a predetermined space (1) and sequentially detects infrared rays of a plurality of detection areas (2), ... Within the space (1). . The infrared detecting means (11) comprising a pyroelectric sensor for detecting infrared rays by generating a differential output according to a change in the amount of infrared light inputted from the surface charging material, and the infrared detecting means (11) Infrared light collecting means (10) for collecting infrared light from the detection area (2) and infrared light are collected by the infrared light collecting means (10) in the predetermined space (1) via an ultrasonic motor. Each detection area (2),
A signal for outputting a temperature distribution signal indicating a temperature distribution in each of the detection areas (2) in the space (1) and a human body position signal indicating a human body position based on a scanning position for scanning The processing means (52) is provided.

The fifth solving means is premised on an infrared detection device which is installed in a predetermined space (1) and sequentially detects infrared rays of a plurality of detection areas (2), ... In the space (1). . Then, an infrared detecting means (11) made of a surface-chargeable material and comprising a pyroelectric sensor for detecting infrared rays by generating a differential output according to a change in the input infrared light amount.
An infrared ray condensing means (10) for condensing infrared rays from the detection area (2) on the infrared ray detecting means (11), and the infrared ray condensing means (10) in the predetermined space (1). Based on the scanning means (51) for intermittently scanning the detection areas (2), on which the infrared rays are collected, and the output of the infrared detecting means (11) and the scanning position by the scanning means (51). A signal processing means (52) for outputting a temperature distribution signal indicating a temperature distribution in each of the detection areas (2), ... In the space (1) and a human body position signal indicating a human body existing position is provided.
Further, the signal processing means (52) includes a determining means (54) for determining whether or not a change in the amount of infrared light detected by the pyroelectric sensor while the scanning by the scanning means (51) is stopped is a threshold value or more, and the determining means (54). A human body signal output means (55) which receives the output of the means (54) and outputs a human body position signal only when the change in the light amount is equal to or more than a threshold value.
And a temperature calculation means (53) for calculating the relative temperature of each of the detection areas (2), ... From the change in the amount of infrared light before and after scanning by the scanning means (51), and the temperature calculation means (53). And temperature signal output means (56) for outputting a temperature distribution based on the temperature and the position signal of the scanning means (51).

A sixth solution means is that each detection area (2) is provided in the signal processing means (52) in the first, second, third or fifth solution means.
The threshold value changing means (57) for changing the threshold value to be lower as the average value of the temperature distribution is lower is provided.

(Operation) With the above configuration, in the invention of claim (1), the scanning area (2) scans the detection area (2) in the space (1), and the infrared ray is detected by the thermopile as the infrared ray detecting means (11). The light quantity is output as a voltage signal, and the signal processing means (52) outputs a temperature distribution signal and a human body position signal in accordance with the light quantity signal.

In that case, as signal processing by the signal processing means (52),
The discriminating means (54) discriminates whether or not the infrared light amount value output from the thermopile is equal to or larger than a preset threshold value. If the light amount is equal to or more than the threshold value, the human body signal output means (55) outputs a human body position signal indicating the presence of the human body and the scanning position at that time, while if the light amount is lower than the threshold value, the temperature signal is output. The output means (56) outputs a temperature distribution signal of the entire indoor space (1) from the scanning position of each detection area (2) and the temperature value calculated by the temperature calculation means (53).

That is, by detecting the temperature distribution in the space (1), the information necessary to make the temperature distribution in the indoor space (1) uniform can be obtained, and by detecting the human body position, it is possible to obtain a comfortable feeling according to the sensation of the human body. The information necessary for air conditioning will be obtained.

According to the invention of claim (1), the scanning means (51) continuously scans the respective detection areas (2), ... And the light quantity change calculation means (58) detects the infrared light quantity signal detected by the thermopile. The change in light amount is calculated based on the
By 4), it is determined whether or not the change in the light amount is equal to or more than the threshold value.
If the change in light amount is equal to or greater than the predetermined threshold value, the human body signal output means (55) outputs the human body signal, and if not, the temperature signal output means (56) outputs the temperature distribution signal.

Therefore, while continuously scanning the detection area (2), even if the temperature of the entire space (1) is close to the human body and it is difficult to determine the presence or absence of the human body from the infrared light amount value, the human body position is detected and the temperature is detected. Information about distribution and body position will be obtained.

According to the invention of claim (3), the human body signal and the temperature distribution signal are output by the same operation as the invention of claim (1).

In that case, the scanning of the scanning means (51) is made intermittent, and the presence or absence of a human body is detected based on the change in the light amount at a fixed position. Therefore, the floor surface temperature of the detection area (2) and the human body Even if the temperature difference from the surface temperature is less likely to occur, if there is movement of the human body within the detection area (2), a predetermined peak will appear in the light amount signal from the thermopile (11) and the floor surface The presence of the human body is detected regardless of the temperature.

According to the invention of claim (4), if the floor surface temperature changes during the scanning from one detection area (2) to the next detection area (2) by the scanning means (51), and the amount of infrared light changes, A corresponding differential output is produced at the electric sensor. Therefore, the signal processing means (52) processes the change signal of the infrared light amount to obtain the relative temperature distribution signal and the human body position signal of each detection area (2), .... In that case, since the focusing means (10) and the pyroelectric sensor are driven by the ultrasonic motor, electromagnetic noise is not generated unlike the case where a stepping motor is used, and the pyroelectric noise caused by the electromagnetic noise is not generated. A malfunction of the sensor will be avoided.

In the invention of claim (5), when the floor surface temperature changes during the scanning from one detection area (2) to the next detection area (2) by the scanning means (51), and the amount of infrared light changes, A corresponding differential output is produced at the electric sensor. Therefore, the signal processing means (52) processes the change signal of the infrared light amount and obtains the relative temperature distribution signal of each detection area (2). Further, a human body position signal can be obtained from a change in the amount of infrared light in each detection area (2) when scanning is stopped. Therefore, the pyroelectric sensor simultaneously obtains the temperature distribution signal and the human body signal, and obtains information useful for comfortable control of the air conditioner and the like.

In the invention of claim (6), the above claims (1), (2),
In the operations of the inventions (3) and (5), the threshold value changing means (57) reduces the threshold value as the average value of the temperature distributions of the respective detection areas (2), ... Is changed to be lower than the initial setting value. For example, when the room temperature is sufficiently low during cooling operation, the threshold value is changed to a low value to prevent the human body from being overlooked, and when the floor surface temperature is high, the threshold value is changed to a high value to detect the presence of a human body. Detection is prevented.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings starting from FIG.

First, the first embodiment will be described with reference to FIGS. 2 to 5 show the configuration of an air conditioner equipped with the infrared detection device according to the first embodiment. In the indoor space (1), (2) is set in the indoor space (1). A detection area for detecting the temperature distribution and the human body position, and (3) is a ceiling-mounted air conditioner for air conditioning of the indoor space (1).

An infrared detection device (4) for detecting infrared rays in the detection area (2) of the indoor space (1) is built in the front surface of the air conditioner (3). ) Is a substantially cylindrical lens holder (5) having a built-in infrared detector and a substantially rectangular parallelepiped casing (6) for fixing the lens holder (5), as shown in FIGS. 3 to 5.
And a U-shaped support frame (7) that supports the casing (6) on both sides so as to be rotatable about a horizontal axis, and is connected to the central portion of the support frame (7). ) And a stepping motor (8) for rotating the entire lens holder (5) around a vertical axis, and a controller (9) for controlling the operation of the infrared detection device (4).

Here, the lens holder (5) has a structure in which thermocouples are connected in series, and serves as infrared detecting means for generating a voltage output according to the amount of infrared light input from the detection area (2). A thermopile (11) and a Fresnel lens (10) as an infrared ray condensing means for condensing infrared rays in the detection area (2) are provided on the thermopile (11).

FIG. 6 shows the control contents of the controller (9). In step S ₁ , a switch (not shown) of the infrared detector (4) is turned on, and in step S ₂ , the lens holder by the stepping motor (8). Initialize the stop position θo of (5) as the initial value of the position signal θ, and drive the stepping motor (8) in step S ₃ to rotate the lens holder (5) as a whole around the vertical axis. , The detection areas (2), ... Are continuously scanned in the indoor space (1). Next, in steps S ₄ , S ₅ , and S ₆ , after successively inputting infrared rays of the thermopile (11), calculating the temperature T from the infrared signal, and reading the scanning position θ at that time,
In step S ₇ , the threshold value Vp for determining the presence or absence of the human body,
From the initial setting value Vpo, which is set as the output value of the thermopile (11) corresponding to the specified infrared input, to the formula Vp = Vpo + a (T-To) (where To is the specified reference temperature and a is a constant) Based on the change, a new threshold value Vp is determined.

Then, in step S _8, the body of notifying that the light quantity signal V is output as a voltage value by the thermopile (11), it is determined whether or not more than the threshold value Vp, there is a human body in Sutepu S ₁₀ equal to or greater than Vp On the other hand, when V is lower than Vp while outputting the position signal, a temperature distribution signal corresponding to the amount of infrared light is output in step S ₉ .

That is, as shown in FIG. 7, the change in the room temperature with respect to the position θ of the detection area (2) (curve 1 in the figure) is output as a temperature distribution signal, and when the light amount change V is equal to or greater than the threshold value Vp, the presence of the human body is detected. And its position θp are output as a human body position signal. Further, as shown in FIG. 8, the threshold value Vp is changed from the initially set initial value Vpo according to the average value of the temperature T, so that the detection accuracy according to the background state is maintained. There is.

Upon completion of the detection of the infrared at a predetermined sampling interval in the above, perform the above control words indoor space (1) until theta = 2n [pi] in step S ₁₁ until one revolution, when one rotation, the switch on in step S ₁₂ Whether it is in the state or not is determined. If it is not on, the control is ended, and if it is on, the above control is repeated.

In the above flow, by the stepping motor (8) and step S _3, scanning means for scanning the area (2) in the indoor space (1) in (51) is constituted by step S ₃ to S _10, the infrared detection A signal processing means (52) for receiving the outputs of the means (11) and the scanning means (51) and outputting a temperature distribution signal in the space (1) and a human body position signal based on the amount of infrared light and the scanning position is configured. Has been done.

Further, as the contents of the signal processing means (52), the step
A temperature calculation means (53) for receiving the output of the infrared detection means (11) and converting it into a temperature signal based on the amount of infrared light by S _5.
There is constituted, discrimination means for the light quantity from the detection area (2) in step S _8, it is determined whether or not equal to or greater than the threshold value Vp (54)
Is configured. Further, in step S _10, receiving the output of該判by means (54), the body signal output means for outputting a human body position signal if the amount of infrared radiation threshold value Vp or more (55)
There is constituted by step S _9, the light amount of infrared radiation threshold value Vp
Temperature signal output means (56) for outputting a temperature distribution signal if the temperature is lower than the above. Further steps
The S _7, the detection area (2), ... threshold changing means the average value of the temperature distribution changes the lower the low threshold value Vp (57) is configured.

Therefore, in the first embodiment, the scanning means (51) scans the detection area (2) in the indoor space (1), and the infrared detection means (11) composed of a thermopile detects the infrared rays of each detection area (2). Is detected and the amount of infrared light is output as a voltage V signal.

Then, the following signal processing is performed by the signal processing signal (52). That is, when the light amount signal V of the thermopile (11) is converted into the temperature signal T by the temperature calculation means (53),
The discriminating means (54) discriminates whether or not the light amount signal V from the thermopile (11) is equal to or more than a preset threshold value Vpo. When V is Vpo or more, the human body signal output means (55) detects the presence of the human body and the scanning position θ at that time.
On the other hand, if the human body position signal indicating p and P is output, if it is lower than Vpo, the temperature signal output means causes the scanning position θ of each detection area (2) by the scanning means (51) and the temperature calculation means (53). ) Each detection area (2), ...
The temperature distribution signal of the entire indoor space (1) is output from the temperature value T of.

That is, by detecting the temperature distribution in the indoor space (1), the information necessary to make the temperature distribution in the indoor space (1) uniform can be obtained, and by detecting the position of the human body, comfort that matches the sensation of the human body can be obtained. You will be able to get the information you need to air-condition.

Particularly, as shown in FIG. 8, the lower the average value of the temperature distributions of the respective detection areas (2), ... It is changed to be lower than the set value Vpo.
For example, as shown in FIG. 15, when the indoor temperature (floor surface temperature) is sufficiently low during the cooling operation, it may be overlooked that the threshold value Vp is low but the human body does not exist even though it exists. On the other hand, when the floor surface temperature is high, unless the threshold value Vp is also increased, there is a risk of erroneous detection of determining that the human body is present when the human body is not present. Therefore, by changing the threshold value Vp in this way,
It is possible to prevent the human body from being overlooked and erroneously detected as described above, and to improve the human body detection accuracy.

Next, a second embodiment will be described based on FIGS. 11 to 15. Also in this embodiment, the structure 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. After performing the same control as steps S ₁ and S ₂ in the first embodiment in steps S ₁₅ and S ₁₆ , step S _{15
At 17} , the lens holder (5) is stopped at the stop position θ for time t ₁ . Next, in steps S ₁₈ , S ₁₉ , and S ₂₀ , the infrared light amount signal V of the thermopile (1) is input, and the difference between the infrared light amount signals V at a predetermined time Δt corresponding to the sampling interval, that is, the infrared light amount change ΔV is calculated. And converting the infrared light amount signal V into a temperature signal T. And step S
_{At 21} , the threshold value Vp2 for determining the presence of a human body is set to an initial value set value Δ set corresponding to a predetermined value of the infrared light amount change ΔV.
Expression from Vpo ΔVp2 = ΔVpo + c (T -T O) ( however, c is a is a constant) to change based on the light amount change ΔV is determined whether or not the threshold value or more ΔYp2 was changed in the Step S _22, determination If is YES, the human body position signal is output in step S ₂₃ , and if the determination is NO, the temperature distribution signal is output in step S ₂₄ .

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

Then, in step S ₂₅ , the lens holder (5) is rotated by Δθ to update the position θ of the detection area (2) to θ = θ + Δθ, and then in steps S ₂₆ and S ₂₇ , step S in the first embodiment described above. _11, the control is terminated by performing the same control as S _12.

In the above flow, the scanning means (51) is constituted by the stepping motor (8) and step S ₂₅ , and step S
Signal processing means (52) is constituted by ₁₇ to S _24.
Further, as the contents of the signal processing means (52), step S ₁₉
Light amount change calculation means for changing operation of the infrared light intensity (58) is constructed and temperature calculating means (53) is constituted by step S ₂₀ at a predetermined time by. And step
The S _22, determination means for light amount change ΔV is determined whether or not the threshold ΔVp2 or (54) is configured. Then, in step S _23, receiving the output of該判by means (54), the body signal output means for outputting a human body position signal (55) is configured when light amount change ΔV is less than the threshold value Vp2, in step S _24, the amount of light Temperature signal output means (56) is configured to output a temperature distribution signal when the change ΔV is lower than the threshold value ΔVp2. Further, in step S _21, the threshold value changing means (57) is configured.

Therefore, in the second embodiment, the light quantity change calculating means (58)
The light amount change ΔV is calculated based on the infrared light amount signal V detected by the infrared detecting means (11), and the special means (54) determines whether or not the light amount change ΔV is at the threshold value Δp2. If the change in light amount ΔV is greater than or equal to 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 by the scanning means (51) is made intermittent, and the presence or absence of the human body is detected based on the light amount change ΔV while the scanning is stopped. Therefore, the floor surface temperature of the detection area (2) and the surface of the human body are detected. Even if the human body moves in the detection area (2) even under the condition that a temperature difference from the temperature is unlikely to occur (mainly during cooling operation), the light amount signal V from the thermopile (11) shows As shown in FIG. 13, a predetermined peak ΔV appears. Therefore, as shown in FIG. 14, the presence of the human body can be detected by setting the threshold value ΔVp2 of the light amount change in advance and comparing it with the value. That is, the temperature difference between the background and the human body temperature is small, and 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 even under the condition that the threshold value is difficult to be set by the discrimination by.

Next, a third embodiment will be described with reference to FIGS. 9 and 10. In this embodiment, the structure of the apparatus is the same as that shown in FIGS. 2 to 5 of the first embodiment. The control content of the controller (9) is substantially the same as that of the second embodiment shown in FIG. 11 except that the scanning of the scanning means (51) is replaced with continuous scanning.

In that case, as shown in FIG. 9 and FIG. 10, by detecting a change ΔV of the infrared light amount signal V at a constant time Δt during scanning, and comparing the value ΔV with a predetermined threshold ΔVp1, the detection area ( It is possible to detect the temperature distribution and the human body position while continuously scanning 2).

Next, a fourth embodiment will be described with reference to FIGS. 16 to 23. In this embodiment, a pyroelectric sensor is used instead of the thermopile (11) as the temperature detecting means in the first and second embodiments.

FIG. 16 and FIG. 17 show the outline of the infrared detecting device (4 ′) in the present embodiment, and (12) is a support member for mounting the whole device, and the support member (12) is provided at the center of the inside thereof. A pyroelectric sensor (11 ') as an infrared detecting means is attached. The pyroelectric sensor (11 ') is made of a piezoelectric crystal such as glycine sulfate and lead titanate, and uses a pyroelectric phenomenon, which is a change in surface charge due to a surface change due to temperature change, and a differential output according to a change in infrared input. Is generated.
Further, (13) is installed so as to fixedly support the pyroelectric sensor (11 '), a P plate for processing an output signal of the pyroelectric sensor (11'), and (10) is the above support. A multi-divided Fresnel lens (14) attached to the front end of the member (12), which is formed by radially dividing an approximately hemispherical whole from a central point facing vertically downward, (14) inside the Fresnel lens (10) and A shield plate (15) provided below the pyroelectric sensor (11 ') and having an opening (14a) in which a portion corresponding to one part of the Fresnel lens (10) divided into eight is opened. Board (1
It is an ultrasonic motor which is provided above 4) and drives the shield plate (14) to rotate in a horizontal plane.

That is, as shown in FIG. 18, in the indoor space (1), circular detection areas (2), ... Are set concentrically from the center of the floor surface every π / 4, and the ultrasonic motor (15) is set. ) By intermittently rotating the shield plate (14) by π / 4, and aligning the opening (14a) with the part corresponding to each part of the Fresnel lens (10). While intermittently scanning the detection areas (2), ... Within (1), the temperature T _{N of} each detection area (2), ... Is based on the voltage change of the pyroelectric sensor (11 ′) before and after the scanning. (N = 1 to 8)
It is designed to detect.

Figure 19 shows the control contents of the controller (9) in the present embodiment, the same control as in step S _1, S ₂ in the first embodiment in step S _30, S _31, a human body detected in step S ₃₂ Enter the mode. That is, the shield plate (14) is stopped at the stop position θ for the time t ₁ . Then, enter the light amount change signal ΔV of the pyroelectric sensor (11 ') in step S _33, step S
_{At 34} , the threshold value ΔVp3 for determining the human body detection is set to an initial value ΔVpo based on the equation ΔVp3 = ΔVpo + d (T−T _O ), where d is a positive constant.
Change from in step S _35, the light quantity change ΔV is the threshold ΔV
Determine if p3 or more.

Then, while the light amount change ΔV and outputs a human body position signal in step S ₃₆ if the threshold DerutaVp3 above, proceeds to step S ₃₇ as it is when the light amount variation ΔV is lower than the threshold DerutaVp3, set the temperature distribution detection mode . That is, the lens holder (5) is rotationally driven at a predetermined time t ₂ until the rotational position θ becomes (θ + Δθ) from the current θ.
Here, the predetermined time t ₂ is determined based on the change characteristics of the surface charge caused by the change in the light amount of the pyroelectric sensor (11 ′) and the like.

Then, in step S _38, the change of the accompanying quantity the movement of the detection area (2), as follows, and calculates a relative temperature T of the new detection area (2). For example, as shown in the upper diagram of FIG. 21, when moving from the first detection area (2) to the next detection area (2), the floor surface temperature changes from T ₁ to T ₂ , and the infrared light intensity is α (T ₂ -T ₁₎ (α is a predetermined constant)
If it changes only, a differential output V2-1 as shown in the lower diagram of the figure is generated in the pyroelectric sensor (11). Similarly, as shown in diagram view and figure 22, the differential output V3-2 occurs in response to changes in the infrared light amount (T ₃ -T ₂₎ even when moving to the next detection area (2) . Therefore, as shown in FIG. 23, the rotation angle of the stepping motor (8) is π / 4, π / 2,
.., 2π with a stop time t ₁ and a moving time t ₂ sequentially and intermittently, and when the infrared input changes as shown in the above figure, a stepwise output change is obtained as shown in the following figure.

That is, if there is a distribution of the floor surface temperatures T ₁ , T ₂ , ... Of the respective detection areas (2), ... As shown in the upper diagram of FIG. 20, the infrared input αT changes as shown in the same diagram during scanning. Occurs, and by sequentially increasing and decreasing the change value from the reference value,
The floor temperature distribution values V2-1, V3-2, ... As shown in the figure below are calculated.

Then, in step S ₃₉ , a floor surface temperature distribution signal indicating the temperature distribution of each detection area (2), ... Is output based on the floor surface temperature distribution value of each detection area (2) ,.

Upon completion of the detection of the infrared at a predetermined sampling interval in the above, perform the above control until the one-round the words indoor space (1) until theta = 2n [pi] in step S _40, the switch at step S ₄₁ if one-round Determine whether it is on or not,
If it is not on, the control is ended, and if it is on, the control is repeated.

In the above flow, the shielding plate (14), scanning means (51) is constituted by an ultrasonic motor (15) and step S _37, the signal processing unit by the step S ₃₂ to S ₃₆ and S _38, S ₃₉ (52) Is configured. The contents of the signal processing means (52) are as follows: Steps S ₃₈ , S ₃₅ , S ₃₆ , S ₃₉ , S ₃₄ , temperature calculation means (53), discrimination means (54), human body signal means (5
5), a temperature signal output means (56) and a threshold value changing means (57), respectively.

Therefore, in the fourth embodiment, since the pyroelectric sensor (11 ') is arranged as the infrared detecting means, the scanning means (51)
When the detection areas (2), ... Are scanned in the indoor space (1) by the infrared ray input changes according to the difference in floor temperature before and after scanning, and the pyroelectric sensor (11 ') receives the infrared rays. A differential output is generated accordingly. Further, when the scanning is stopped, the infrared input value changes when a human body exists in the detection area (2), so that a differential output corresponding to the input change is generated in the pyroelectric sensor (11 ').

Therefore, the signal processing means (52) causes the scanning means (5
Along with the scanning of 1), the relative temperatures of the respective detection areas (2), ... Are sequentially detected, a temperature distribution signal is output based on the data, and a human body position signal is output.

As a function of the signal processing means (52), the discriminating means (54) discriminates whether or not the infrared light quantity change ΔV is equal to or more than the threshold value ΔVp3 while the scanning means (51) is stopped, and the threshold value ΔVp3 or more. In the case of, the human body signal output means (55) outputs a human body signal for notifying the presence and position of the human body (detection area (2)). Also, temperature calculation means (53)
The relative temperature of each detection area (2) is calculated from the change in the amount of infrared light before and after scanning, and the temperature signal output means (56) outputs the temperature distribution signal of each detection area (2). To be done. Therefore, such information regarding the human body position and temperature distribution can be used for air conditioning.

In particular, since the threshold value changing means (58) changes the threshold value ΔVp3 to be lower as the average floor temperature is lower, the human body detection accuracy is improved.

In particular, the human body position signal output from the infrared detection device and the temperature distribution signal are connected to a control device (not shown) of the air conditioner (3), and the air conditioner (3) is responsive to the signals. It is designed to control the capacity, air volume, wind direction, etc. Therefore, the effects of the above-described inventions are actually used for air conditioning in the indoor space (1) to make the temperature distribution in the indoor space (1) uniform and to control the sensitivity, wind direction, etc. according to the human body's sensation. Therefore, a comfortable air-conditioned space can be created.

As the infrared detecting means in the present invention, in addition to the thermopile and pyroelectric sensor in each of the above-mentioned embodiments, a thermistor type sensor utilizing resistance change such as InSb, CdHg, etc. can be used.

Further, it goes without saying that the infrared ray condensing means is not limited to the Fresnel lens as in the above-mentioned embodiment, and an ordinary lens, a multi-parabolic mirror or the like can be used.

(Effect of the Invention) As described above, according to the infrared detection device of the invention of claim (1), a plurality of detection areas are set in the indoor space, and the detection areas are sequentially scanned in the indoor space. A signal that detects infrared rays from each detection area with a thermopile and outputs a human body position signal indicating the presence and position of a human body based on the scanning position and infrared signals, and a temperature distribution signal indicating the temperature distribution of each detection area. Based on the infrared light amount signal in each detection area, a human body position signal indicating the position where the human body exists when the light amount is above a predetermined threshold value, and a temperature distribution signal of each detection area when the infrared light amount is lower than the threshold value Since it is designed to output, a useful human body signal and temperature distribution signal can be obtained.
By using the signal, it is possible to uniformize the temperature distribution in the indoor space and provide information for performing air conditioning that adapts to the sensation of the human body.

According to the invention as set forth in claim (2), scanning of each detection area is continuously performed, and when the change of the infrared light amount within a predetermined time during scanning is a predetermined threshold value or more, a human body signal is transmitted,
Since the temperature distribution signal is output when the light intensity change is lower than the threshold value, 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 the human body from the infrared light intensity signal value. Also, the effect of the invention of claim (1) can be effectively obtained.

According to the invention of claim (3), each detection area is intermittently scanned, and when the change in the amount of infrared light stopped in each detection area is equal to or larger than a predetermined threshold value, the human body position signal is output, and when the change is lower than the threshold value. Since the temperature distribution signal is output, the presence of the human body can be effectively detected even when the floor surface temperature is close to the human body temperature and it is difficult to determine the presence or absence of the human body from the light intensity value.

According to the invention of claim (4), since the infrared detecting means is composed of the pyroelectric sensor and the condensing area is scanned through the ultrasonic motor, the detection area is changed from the next detection area to the next detection area. It is possible to know the relative temperature difference between each detection area and the human body position based on the change of the term amount during movement, and to improve the detection accuracy by avoiding the malfunction of the pyroelectric sensor due to electromagnetic noise. Can be achieved.

According to the invention of claim (5), the pyroelectric sensor is used to detect the temperature distribution during scanning of each detection area, and
Since the human body position is detected in one of the detection areas while it is stopped, it is possible to effectively utilize the characteristics of the pyroelectric sensor and output a useful human body position signal and temperature distribution signal.

According to the invention of claim 6, the above-mentioned claims (1), (2),
In the invention of (3) or (5), the threshold value is changed to be lower as the average value of the temperature distribution of each detection area is lower, so that the detection accuracy of the temperature of the indoor space can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of the present invention. 2 and the following shows an embodiment of the present invention, and FIGS.
2 shows the configuration of an infrared detection device in a third embodiment,
FIG. 4 is a perspective view schematically showing the state of the indoor space, FIG. 3 is a perspective view showing the entire structure of the infrared detection device, FIG. 4 is a side view of the lens holder, FIG. 5 is the same plan view, and FIG. 8 shows the first embodiment, FIG. 6 is a flow chart showing the control contents 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. Is a characteristic diagram showing a method of changing the threshold value, FIGS. 9 and 10 show a third embodiment, FIG. 9 is a characteristic diagram showing a relation between a sensor output signal and a scanning position, and FIG. 10 is an infrared light amount. FIG. 11 to FIG. 15 are characteristic diagrams showing the relationship between changes and threshold values, and FIG. 11 to FIG.
The figure is a flow chart 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 is a diagram showing a method of detecting a human body by changing the light amount.
Partial enlarged view of the figure, FIG. 14 is a characteristic diagram showing the relationship between the light amount change and the threshold value, FIG. 15 is an explanatory diagram showing the effect of the threshold value change,
FIG. 16 to FIG. 23 show a fourth embodiment, FIG. 16 is a side view showing the whole structure of the infrared detecting device, FIG. 17 is a plan view of the same, and FIG.
Fig. 18 is an explanatory diagram showing the setting of the detection area in the indoor space, and Fig. 20 shows the floor surface temperature, the pyroelectric sensor input signal, and the floor surface temperature distribution signal for the scanning position. Figures 21, 21 and 22 upper and lower figures are explanatory diagrams sequentially showing the change in infrared ray input in the detection area before and after scanning and the resulting differential output of the pyroelectric sensor, and FIG. The figure and the lower figure are characteristic diagrams showing the change of the infrared light amount of each detection area with respect to the scanning position and the output of the pyroelectric sensor, respectively. (1) …… Indoor space, (2) …… Detection area, (10)…
... Fresnel lens (infrared ray condensing means), (11) ... thermopile (infrared ray detecting means), (11 ') ... pyroelectric sensor (infrared ray detecting 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 change means, (58) …… Light intensity change calculation means.

Claims (6)

[Claims] 1. An infrared detector installed in a predetermined space (1) for sequentially detecting infrared rays of a plurality of detection areas (2), ... Within the space (1), the thermocouple being a thermocouple. Infrared detecting means (11) consisting of a thermopile that is connected in series and generates a voltage output according to the amount of incident infrared light to detect infrared rays, and the infrared detecting means (1).
1) Infrared light collecting means (10) for collecting infrared light from the detection area (2), and each detection area collected by the infrared light collecting means (10) in the predetermined space (1) Each detection in the space (1) is based on the scanning means (51) for continuously scanning (2), ... And the output of the infrared detecting means (11) and the scanning position by the scanning means (51). A signal processing means (52) for outputting a temperature distribution signal indicating a temperature distribution in the areas (2), ... And a human body position signal indicating a human body existing position, the signal processing means (52) is a thermopile infrared ray. A temperature calculation means (53) for converting the light amount signal into a temperature signal and a judgment means for receiving the output of the thermopile and judging whether or not the infrared light amount in each of the detection areas (2), ... Is higher than a predetermined threshold value. 54) and the output of the discrimination means (54) When the human body signal output means (55) that outputs a human body position signal when the amount is equal to or more than the threshold value, the outputs of the determination means (54) and the temperature calculation means (53), and the infrared light amount is lower than the threshold value An infrared detector comprising: a temperature signal output means (56) for outputting a temperature distribution signal. 2. An infrared detecting device which is installed in a predetermined space (1) and sequentially detects infrared rays from a plurality of detection areas (2), ... In the space (1), the thermocouple comprising: Infrared detecting means (11) consisting of a thermopile which is connected in series and generates a voltage output according to the amount of incident infrared light to detect infrared rays, and the infrared detecting means (1).
1) Infrared light collecting means (10) for collecting infrared light from the detection area (2), and each detection area collected by the infrared light collecting means (10) in the predetermined space (1) Each detection in the space (1) is based on the scanning means (51) for continuously scanning (2), ... And the output of the infrared detecting means (11) and the scanning position by the scanning means (51). A signal processing means (52) for outputting a temperature distribution signal indicating a temperature distribution in the areas (2), ... And a human body position signal indicating a human body existing position, the signal processing means (52) is a thermopile infrared ray. The temperature calculation means (53) for converting the light quantity signal into a temperature signal, the light quantity change calculation means (58) for receiving the output of the thermopile and calculating the change of the infrared light quantity in a predetermined time, and the scanning means (51) for scanning. During the stop, the light intensity change calculation means (5
8) A discrimination means (54) for discriminating whether or not the change of the infrared light amount calculated in step 8) is equal to or more than a threshold value, and an output of the discrimination means (54), and when the light amount change is equal to or more than the threshold value, a human body position signal is output. The human body signal output means (55) for outputting and the discrimination means (5
4) and a temperature signal output signal means (56) for receiving the output of the temperature calculation means (53) and outputting a temperature distribution signal when the change in light quantity is lower than a threshold value. . 3. An infrared detecting device which is installed in a predetermined space (1) and sequentially detects infrared rays of a plurality of detection areas (2), ... In the space (1), which is a thermocouple. Infrared detecting means (11) consisting of a thermopile that is connected in series and generates a voltage output according to the amount of incident infrared rays to detect infrared rays, and the infrared detecting means (11).
Infrared light collecting means (10) for collecting infrared light from the detection area (2) and each detection area (2) collected by the infrared light collecting means (10) in the predetermined space (1). ), ..., Scanning means (51) for intermittently scanning, the infrared detecting means (11), the output, and the scanning position by the scanning means (51) based on the respective detection areas () in the space (1). 2), ... A signal processing means (52) for outputting a temperature distribution signal indicating a temperature distribution and a human body position signal indicating a human body existing position, the signal processing means (52) being a thermopile infrared light quantity signal. Temperature calculation means (53) for exchanging the temperature signal with the temperature signal, a light quantity change calculation means (58) for receiving the output of the thermopile and calculating the change of the infrared light quantity in a predetermined time, and the scanning by the scanning means (51) is stopped. To the light intensity change calculation means (5
8) Discriminating means (54) for discriminating whether or not the change in the infrared light amount calculated in step 8) is equal to or more than a threshold value, and receiving the output of the discriminating means (54), outputting a human body position signal when the light amount change is equal to or more than the threshold value. Temperature signal output means (56) which receives the outputs of the human body signal output means (55), the discrimination means (54) and the temperature calculation means (53) and outputs a temperature distribution signal when the change in light quantity is lower than a threshold value. An infrared detection device comprising: 4. An infrared detecting device which is installed in a predetermined space (1) and sequentially detects infrared rays from a plurality of detection areas (2), ... Detection means (11) comprising a pyroelectric sensor which is made of a conductive material and generates a differential output according to a change in the amount of infrared light input to detect infrared rays, and the detection area (11) in the infrared detection means (11). Infrared light collecting means (10) for collecting the infrared light from 2) and each detection in which the infrared light is collected by the infrared light collecting means (10) in the predetermined space (1) via an ultrasonic motor. Based on the scanning means (51) for scanning the areas (2), ... And the output of the infrared detecting means (11) and the scanning position by the scanning means (51), each detection area (in the space (1) ( 2) The temperature distribution signal and the human body showing the temperature distribution in ... Infrared detection apparatus characterized by comprising signal processing means for outputting a human body position signal indicating the presence position and (52). 5. An infrared detecting device which is installed in a predetermined space (1) and sequentially detects infrared rays from a plurality of detection areas (2), ... Detection means (11) comprising a pyroelectric sensor which is made of a conductive material and generates a differential output according to a change in the amount of infrared light input to detect infrared rays, and the detection area (11) in the infrared detection means (11). Infrared light collecting means (10) for collecting infrared light from 2), and detection areas (2) for collecting infrared light by the infrared light collecting means (10) in the predetermined space (1). Means for intermittently scanning the (51)
And the output of the infrared detecting means (11) and the scanning means (51)
A signal processing means (52) for outputting a temperature distribution signal indicating a temperature distribution in the detection area (2) in the space (1) and a human body position signal indicating a human body existing position based on the scanning position of the human body. ) And the signal processing means (52) is a determination means (54) for determining whether or not the change in the amount of infrared light detected by the pyroelectric sensor while the scanning by the scanning means (51) is stopped is greater than or equal to a threshold value. A human body signal output means (55) which receives the output of the discrimination means (54) and outputs a human body position signal only when the light quantity change is equal to or more than a threshold value, and the infrared light quantity change before and after scanning by the scanning means (51). A temperature calculating means (53) for calculating the relative temperature of the detection areas (2), and a temperature distribution based on the temperature calculated by the temperature calculating means (53) and the position signal of the scanning means (51). Specially equipped with temperature signal output means (56) Infrared detection device as. 6. The signal processing means (52) is provided with a threshold value changing means (57) for changing the threshold value to be lower as the average value of the temperature distribution of each detection area (2) is lower. The infrared detection device according to claim 1, wherein the infrared detection device is according to claim 1.