JP3656472B2 - Human body detection device - Google Patents

Human body detection device Download PDF

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Publication number
JP3656472B2
JP3656472B2 JP22964599A JP22964599A JP3656472B2 JP 3656472 B2 JP3656472 B2 JP 3656472B2 JP 22964599 A JP22964599 A JP 22964599A JP 22964599 A JP22964599 A JP 22964599A JP 3656472 B2 JP3656472 B2 JP 3656472B2
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Prior art keywords
value
threshold value
human body
sensor
image sensor
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JP2001051067A (en
Inventor
毅 内田
崇 松本
利康 樋熊
秀哲 石岡
作雄 菅原
弘之 辻
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三菱電機株式会社
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Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a human body detection device for detecting the presence and position of a human body in a detection region.
[0002]
[Prior art]
Conventionally, for example, a problem of an air conditioner has been reduction of power consumption and improvement of comfort. One of effective means for achieving this problem is a means for detecting the presence and position of a person. That is, if the presence / absence of a person in the air-conditioned area can be detected by the human body detection device, the air-conditioning device can be stopped in the absence and the power consumption can be greatly reduced. In addition, even when present, if the position of a person in the air-conditioned area can be detected, power consumption can be reduced by controlling the blowing air direction of the air conditioner in that direction and controlling the air conditioning only in the area where the person is present.
Similarly, a person's position is detected, and the detected person's thermal sensation is detected using an index such as PMV, and cold air is intensively sent to people who feel hot, or conversely, It is possible to improve the comfort of each person by avoiding children who are present.
[0003]
Accordingly, various human body detection devices that detect the presence and position of a person have been developed for the purpose of being mounted on an air conditioner. This conventional human body detection device detects the presence of a person from the movement of heat, that is, temperature information using an infrared sensor such as a pyroelectric sensor, or detects from the image information using an image sensor such as a CCD camera. Was the main.
[0004]
Here, the infrared sensor is a sensor that detects a person by detecting a current that changes when a thermal object enters and leaves the detection area. Since this is detected only from temperature information, there is an advantage that it can be detected regardless of illuminance, but it also reacts to temperature changes caused by warm air or sunlight of the air conditioner. Therefore, when the human body is detected by the infrared sensor alone, there is a problem that the air-conditioning apparatus malfunctions in response to an object other than a person. In addition, the infrared sensor can detect only one area with one sensor and can detect whether a person is present in the area, but cannot detect a position. Therefore, in order to widen the detection area, it is necessary to increase the number of sensors, and there is a problem that the cost is increased by the number of sensors.
[0005]
One of the image sensors is typically an image sensor that detects an image of light in the visible light range, such as a CCD camera. These have the advantage that people in a wider area can be detected if the imaging surface is enlarged and the lens is adjusted. Since it is possible to divide the area for each pixel at the same time, it is possible to detect by area. However, in the case of a general image sensor, when a captured image is dark, that is, when there is no illumination, an appropriate image cannot be captured, and thus there is a problem that the presence and position of a person cannot be detected from the image. Was. Furthermore, when the target human body is far, there is a problem that it is difficult to distinguish the small movement and noise in image processing.
[0006]
As described above, when the infrared sensor and the image sensor are used alone, there are problems, respectively. In order to solve this problem, for example, as disclosed in JP-A-4-13026, an infrared sensor is used. There has also been proposed a human body detection device that can accurately detect the presence and position of a person by using both the obtained temperature image information and the human body image information obtained from an image sensor.
[0007]
[Problems to be solved by the invention]
However, in the configuration of the human body detection device in which the infrared sensor and the image sensor are simply combined as described above, the presence and position of a person can be detected more accurately than using each sensor alone, but the sensor itself Set the threshold independently. In other words, the infrared sensor does not change the threshold setting even when the output value exceeds the threshold value in response to temperature changes caused by warm air or sunlight from the air conditioner, and the captured image is dark. It is unclear whether a proper image cannot be captured, whether the target human body is too far away for image processing, or whether the human body really does not exist. Therefore, although the accuracy of detecting a human body is improved as compared with the case of using individual sensors, there is no relationship between the infrared sensor and the image sensor, and the drawbacks of each sensor cannot be compensated.
[0008]
The present invention has been made to solve such a problem, and a human body detection device that can more accurately detect the presence and position of a person in a detection region by using two sensors, an infrared sensor and an image sensor. I will provide a.
[0010]
[Means for Solving the Problems]
Book The invention includes an infrared sensor that outputs a current value by reflection of infrared rays and an image sensor that outputs a luminance value from an image of light in a visible light range, and compares the output value of the infrared sensor with a threshold value and the image sensor. In the human body detection device that determines the presence or absence of the human body based on the comparison result, the output value of at least one of the infrared sensor and the image sensor has a threshold value. When it exceeds, the threshold value of the other sensor is changed to a value reduced by a certain value, and when the output value of the one sensor becomes less than the threshold value, the threshold value of the other sensor is changed to a certain value. The value is changed to an increased value.
[0011]
Further, according to the present invention, when the output value of one of the infrared sensor and the image sensor becomes less than or equal to the threshold value, the threshold value of the other sensor is gradually increased.
[0012]
The present invention includes an infrared sensor that outputs a current value by reflection of infrared rays and an image sensor that outputs a luminance value from an image of light in a visible light range, and compares the output value of the infrared sensor with a threshold value and the image. In the human body detection device that compares the output value of the sensor with the threshold value and determines the presence or absence of a human body based on the comparison result, the threshold value of the infrared sensor is changed based on the relationship between the output value of the image sensor and the threshold value. At the same time, the threshold value of the image sensor is changed based on the relationship between the output value of the infrared sensor and the threshold value.
[0013]
The present invention includes an infrared sensor that outputs a current value by reflection of infrared rays and an image sensor that outputs a luminance value from an image of light in a visible light range, and compares the output value of the infrared sensor with a threshold value and the image. In the human body detection device that compares the output value of the sensor with the threshold value and determines the presence or absence of the human body based on the comparison result, when the output value of the infrared sensor exceeds the threshold value, the threshold value of the image sensor is constant. When the output value of the infrared sensor is less than or equal to the threshold value, the threshold value of the image sensor is changed to a value increased by a certain value, and the output value of the image sensor is When the threshold value is exceeded, the threshold value of the infrared sensor is changed to a value obtained by subtracting a certain value, and when the output value of the image sensor decreases from the threshold value to less than the threshold value, And it changes the threshold line sensor to a value increased by a predetermined value.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
FIG. 1 is a configuration diagram of a human body detection apparatus according to Embodiment 1 of the present invention. FIG. 2 is a flowchart showing the control operation of the human body detection apparatus. Although the human body detection device of the present invention can be mounted on a lighting device or the like in addition to the one mounted on the air conditioning device, the human body detection device mounted on the air conditioning device will be described in the present embodiment. In FIG. 1, 1 is a human body detection device that detects a human body in a detection region, 2 is a human body presence detection means that detects the presence of a human body in the detection region, and 3 is a human body position detection that detects the position of the human body in the detection region. Means 4 is a threshold setting means for setting the thresholds of the human body presence detection means 2 and the human body position detection means 3, and 5 is a human body for determining the presence and position of the human body from the detection results of the human body presence detection means 2 and the human body position detection means 3. Presence / position determining means 6 is an air conditioner control means for controlling the blowing air direction of the air conditioner.
Here, the human body detection device 1 includes a human body presence detection unit 2, a human body position detection unit 3, a threshold setting unit 4, and a human body presence / position determination unit 5.
[0015]
The human body presence detection means 2 includes an infrared sensor 7 that detects indoor temperature information, particularly infrared radiation of the human body, and a comparison determination means 8 that compares the output value of the infrared sensor 7 with a threshold value for determining that a human body exists. The human body presence confirmation unit 9 confirms the existence of the human body in the detection region based on the determination result of the comparison determination unit 8 and the like.
In addition, the human body position detection unit 3 includes an image sensor 10 including an image sensor that captures an indoor image, and a comparison determination unit 11 that compares an output value of the image sensor 10 with a threshold value for determining that a human body exists. The human body position confirming means 12 confirms the position of the human body in the detection region based on the determination result of the comparison determining means 11. This image sensor 10 is composed of an image sensor that detects an image of light in the visible light range, like a CCD camera, and can divide the area for each image element, so that it is possible to detect by area. The position of the human body can be detected along with the presence of the human body.
[0016]
The threshold setting unit 4 includes a threshold changing unit 13 that changes the threshold of the image sensor 10 and a time measuring unit 14 such as a timer that outputs an elapsed time to the threshold Th1 changing unit 13 and the human body presence checking unit 9. ing.
[0017]
Next, the operation of the human body detection apparatus configured as described above will be described based on the flowchart of FIG. When the air conditioner is turned on (step S1) by an input from an operation panel or the like (not shown) of the air conditioner, the power supply of the human body detection device 1 is also turned on at the same time (step S2). Simultaneously with the power-on of the human body detection device 1, the infrared sensor 7 and the image sensor 10 start detecting the human body in the detection region, for example, in the air-conditioned region of the air conditioner (steps S3 and S4). The infrared sensor 7 outputs heat movement, that is, temperature information in the detection region as a current value, and this output value (hereinafter referred to as “output value A2”) and a preset threshold value of the infrared sensor 7 (hereinafter referred to as “threshold value”). Is referred to as “Th2”) by the comparison determination means 8 (step S5). If this output value is greater than or equal to threshold value Th2 (YES in step S5), it is determined that there is a person in the detection area, and if it is less than threshold value Th2 (NO in step S5), it is determined that there is no person in the detection area. .
[0018]
On the other hand, the image sensor 10 outputs image information in the detection area as a luminance value, and this output value (hereinafter referred to as “output value A1”) and a preset threshold value of the image sensor 10 (hereinafter referred to as “threshold value Th1”). ) Is compared by the comparison / determination means 11 (step S7), and if the output value is equal to or greater than the threshold value Th1 (YES in step S7), it is determined that there is a person in the detection area and its position is detected and output. If the value is less than the threshold Th1 (YES in step S7), it is determined that there is no person in the detection area.
Here, the threshold value Th1 of the image sensor 10 is not a constant value, but is set to be changed according to the detection result of the infrared sensor 7, and the contents of the change of the threshold value Th1 will be described below.
[0019]
If the output value A2 of the infrared sensor 7 is equal to or greater than the threshold value Th2 (YES in step S5), the infrared sensor 7 determines that there is a person in the detection area, and outputs the determination result to the threshold value Th1 changing means 13. Then, the setting of the threshold value Th1 is changed (step S6). The change of the time-series threshold value Th1 will be described below.
[0020]
FIG. 3 is a relationship diagram between output values of the infrared sensor 7 and the image sensor 10 and threshold values. The horizontal axis represents the elapsed time, and the vertical axis represents the output values A1 and A2 of the infrared sensor 7 and the image sensor 10. The elapsed time is counted by the time measuring means 14 and output to the threshold changing means 13. The threshold value Th2 of the infrared sensor 7 is set to the same value as that when the infrared sensor 7 is used alone. When the output value A2 of the infrared sensor 7 is equal to or greater than the threshold Th2, that is, between time T1 and T2, it is determined that a human body exists, and after time T2, it is determined that no human body exists until T3. The comparison / determination result between the output value A2 and the threshold value Th2 is continuously output to the threshold value Th1 changing unit 13.
[0021]
On the other hand, the threshold value Th1 of the image sensor 10 is the same value as the threshold value when the image sensor 10 is used alone during the time period (T0 to T1) when the output value A1 of the infrared sensor 7 does not exceed the threshold value Th2. It is set to a certain H1.
At time T1, the output value A2 of the infrared sensor 7 exceeds the threshold Th2, and the information is input to the threshold Th1 changing means 13, and the threshold Th1 of the image sensor 10 is a minimum control limit value for controlling the image sensor 10. Step down to a certain L1. This is because when the infrared sensor 7 detects the presence of a person, it is considered that there is a high possibility that the person exists, and thus the threshold Th1 of the image sensor 10 is lowered to make it easier to find the person. .
[0022]
When the time T2 has passed, the output value A2 of the infrared sensor 7 falls below the threshold Th2, and it is determined that there is no person. This information is input to the threshold value changing means 13, and the threshold value Th1 of the image sensor 10 rises to reach H1. At this time, since the infrared sensor 7 has detected that there is a person, it is highly possible that there is still a person in the detection area, and it is necessary to perform control to detect the person with the image sensor 10 as much as possible. The threshold value Th1 is increased along with the elapsed time, and reaches H1 over a certain period of time. By raising the threshold Th1 to H1 over this fixed time (for example, 120 seconds), the infrared sensor 7 and the image sensor 10 are given a time grace to detect whether or not there is actually a person in the detection area, The human body detection device 1 is controlled in a direction to try to find a person as a whole.
[0023]
Further, at time T3, the output value of the infrared sensor 7 becomes equal to or higher than the threshold value Th2, and the threshold value Th1 again maintains the minimum control limit value L1 by the input from the threshold value changing unit 13. Further, after time T4, the output value A2 of the infrared sensor 7 again falls below the threshold value Th2, and it is determined that there is no person, and the threshold value Th1 of the image sensor 10 gradually increases to reach H1 again.
In FIG. 6, only the image sensor 10 from the start of detection has its output value A1 exceeding the threshold value Th1 at time T5. However, if both the infrared sensor 7 and the image sensor 10 have output values exceeding the threshold value, The detection result of the infrared sensor 7 is first detected and the threshold value Th1 of the image sensor 10 is lowered to L1, and then the threshold value Th2 of the infrared sensor 7 is lowered to L2 based on the detection result of the image sensor 10.
[0024]
As described above, the threshold value Th1 of the image sensor 10 is changed by the output value A2 of the infrared sensor 7, and the changed threshold value Th1 and the output value A1 of the image sensor 10 are compared by the comparison determination means 11 (step S7). ).
From the determination results of these comparison determination means 8 and 11, Human body existence confirmation means 9 First, it is confirmed whether or not the infrared sensor 7 confirms the presence of the human body, that is, whether the output value A2 ≧ threshold Th2, and if the presence of the human body is confirmed (YES in step S8), then the image It is determined whether the sensor 10 has confirmed the presence of a human body (step S10). If the presence has been confirmed, the position of the human body is specified at the same time (YES in step S10). After confirming the presence and position of the human body, the human body presence / position determining means 5 determines the presence of the human body and the like, and outputs it to the air conditioner control means 6. Based on the presence and position of the human body, the air conditioner control means 6 performs spot-like air conditioning such as directing the wind direction to the living area where the person is detected and applying cool air (step S11). Thereby, energy-saving and highly comfortable air conditioning control can be performed.
[0025]
Even if the output value A2 of the infrared sensor 7 exceeds the threshold value Th2 (YES in step S8), but the output value A1 of the image sensor 10 does not exceed the threshold value Th1 (NO in step S10), the presence of the human body is confirmed. The means 9 confirms the presence of the human body, and the human body presence / position determining means 5 determines only the presence of the human body and outputs it to the air conditioner control means 6. The air conditioner control means 6 performs wide air conditioning such as blowing cool air toward the entire room based on the information that the human body is present (step S12).
[0026]
If the output value A2 of the infrared sensor 7 does not exceed the threshold value Th2 (NO in step S8), but the output value A1 of the image sensor 10 exceeds the threshold value Th1 (YES in step S9), the presence of a human body is confirmed. The means 9 cannot confirm the existence of the human body because the comparison / determination means 8 denies the existence of the human body. At this time, the human body position presence determination means 5 receives only the signal from the comparison determination means 11, determines only the presence of the human body, and outputs this to the air conditioner control means 6. The air conditioner control means 6 is based on the information that the human body is present. The entire Wide air conditioning is performed such as directing the wind direction to cool air or the like (step S12).
[0027]
Furthermore, when neither the infrared sensor 7 nor the image sensor 10 has confirmed the presence of a human body (NO in step S9), the human body presence confirmation means 9 does not confirm the presence of a human body. Does not determine existence / position. In this case, the elapsed time during which the presence of the human body is not confirmed is continuously measured by the time measuring means 14, and the operation of the air conditioner control means 6 is stopped when a predetermined time or more has elapsed. Thereby, energy-saving air conditioning control can be performed.
[0028]
By always performing the above control operation during the operation of the air conditioner, the presence and position of the human body can always be detected. Further, this detection may be repeated every time a fixed time elapses.
[0029]
Embodiment 2. FIG.
FIG. 4 is a block diagram of a human body detection apparatus according to Embodiment 2 of the present invention. In addition, the same code | symbol is attached | subjected to Embodiment 1 and an equivalent part, and description is abbreviate | omitted.
In the first embodiment, the threshold value Th1 of the image sensor 10 is changed from the detection result of the infrared sensor 7. However, if the threshold value Th2 of the infrared sensor 7 can also be changed from the detection result of the image sensor 10, more people are detected. It is possible to provide the human body detection device 1 that is easy to perform. Therefore, in the present embodiment, the threshold value Th1 of the image sensor 10 is changed from the detection result of the infrared sensor 7, and the threshold value Th2 of the infrared sensor 7 is also changed from the detection result of the image sensor 10.
[0030]
In FIG. 4, 15 is a threshold Th1 changing means for changing the threshold of the infrared sensor 7. Therefore, in the second embodiment, the threshold setting unit 4 includes the threshold Th2 changing unit 13 that changes the threshold of the image sensor 10, the threshold Th2 changing unit 15 that changes the threshold of the infrared sensor 7, and the threshold changing unit 13, 15 includes time measuring means 14 such as a timer that outputs an elapsed time.
[0031]
Next, the operation of the human body detection apparatus configured as described above will be described based on the flowchart of FIG. Since the basic operation is as described in the first embodiment, the description is omitted.
When the infrared sensor 7 and the image sensor 10 are turned on (steps S3 and S4), first, the output value of the infrared sensor 7 and the preset threshold value Th1 of the infrared sensor 7 are compared by the comparison determination means 8 (step S5). ). If this output value is greater than or equal to the threshold Th1 (YES in step S5), it is determined that there is a person in the detection area, and if it is less than the threshold Th1 (NO in step S5), it is determined that there is no person in the detection area. .
[0032]
On the other hand, the comparison determination means 11 similarly compares the output value of the image sensor 10 with a preset threshold value Th2 of the image sensor 10 (step S7), and the output value is equal to or greater than the threshold value Th2 (YES in step S7). If it is determined that there is a person in the detection area, the position is detected, and if the output value is less than the threshold Th2 (YES in step S7), it is determined that there is no person in the detection area.
[0033]
If the output value of the infrared sensor 7 is equal to or greater than the threshold value Th2 (YES in step S5), the infrared sensor 7 determines that there is a person in the detection area, and outputs the determination result to the threshold value Th1 changing means 13. Then, the setting of the threshold value Th1 is changed (step S6). If the output value of the image sensor 10 is equal to or greater than the threshold value Th1 (YES in step S7), the image sensor 10 confirms the presence / position of a person in the detection area and sends the determination result to the threshold value Th2 changing means 15. The threshold value Th2 is changed to output (step S15).
[0034]
The change of the threshold values of the infrared sensor 7 and the image sensor 10 will be specifically described below.
FIG. 6 is a relationship diagram between output values of the infrared sensor 7 and the image sensor 10 and threshold values. The horizontal axis represents the elapsed time, and the vertical axis represents the output values of the infrared sensor 7 and the image sensor 10. The elapsed time is counted by the time measuring means 14 and output to the threshold changing means 13 and 15.
The infrared sensor 7 determines that the human body exists when the output value A2 is greater than or equal to the threshold Th2, that is, between time T5 and T7, and determines that there is no human body until time T5 and between T7 and T8. This determination result is continuously output to the threshold Th1 changing means 13.
On the other hand, the threshold value Th1 of the image sensor 10 is determined that the human body exists when the output value A1 is greater than or equal to the threshold value Th1, that is, between time T5 and T6 and after T8, and until the time T5 and between T6 and T8, Judge that it does not exist. This determination result is continuously output to the threshold Th2 changing means 15.
[0035]
Until the time T5, the output values of both the infrared sensor 7 and the image sensor 10 do not exceed the threshold values, so the threshold values (H1, H2) set in advance for the respective sensors are maintained. At time T5, the output value A1 of the image sensor 10 exceeds the threshold value Th1, the information is input to the threshold value Th2 changing means 15, and the threshold value Th2 of the infrared sensor 7 is L2 which is the minimum control limit value for controlling this sensor. Step down. That is, when the output value A1 of the image sensor 10 exceeds the threshold value Th1, there is a high possibility that there is a person. Therefore, the threshold value Th2 of the infrared sensor 7 is lowered to control the person easily.
[0036]
Further, after time T6, the output value A1 of the image sensor 10 falls below the threshold value Th1, and it is determined that there is no person. This information is input to the threshold Th2 changing means 15, and the threshold Th2 of the infrared sensor 7 increases to reach H2. At this time, the image sensor until a while ago 10 Has detected that there is a person, it is highly possible that there is still a person in the detection area, and performs control to detect the person with the infrared sensor 7 as much as possible, and gradually increases the threshold Th2 with the elapsed time, A certain time is taken to reach H2. By gradually increasing the threshold value Th2 to H2 over this fixed time, the infrared sensor 7 and the image sensor 10 are given a grace period for detecting whether or not there is actually a person in the detection area.
[0037]
Further, at time T7, the output value of the infrared sensor 7 becomes equal to or less than the threshold value Th2, and the information is input to the threshold value Th1 changing means 13, and the threshold value Th1 gradually increases the threshold value Th1 with the elapsed time. Further, after the time T8, the output value of the image sensor 10 becomes equal to or higher than the threshold value Th1, and the threshold value Th2 of the infrared sensor 7 is decreased stepwise until L2.
[0038]
As described above, the threshold values of the infrared sensor 7 and the image sensor 10 are changed according to the output values of the sensors, and the changed threshold values and the output values of these sensors are compared by the comparison determination means 8 and 11 (steps). S5, step S7).
Subsequent operations are the same as in the first embodiment, and energy-saving and comfortable by selectively using spot-type air conditioning such as directing the wind direction toward the living area where the person is detected or wide-type air conditioning. Air conditioning control with high performance can be performed.
[0039]
The presence and position of the human body can always be detected by repeatedly performing the above control operation at all times during the operation of the air conditioner or every certain period of time.
[0041]
【The invention's effect】
As is clear from the above invention A human body detection apparatus according to the present invention includes an infrared sensor that outputs a current value by reflection of infrared rays and an image sensor that outputs a luminance value from an image of light in a visible light range, and outputs an output value and a threshold value of the infrared sensor. In the human body detection device that compares and compares the output value of the image sensor with a threshold value and determines the presence / absence of a human body based on the comparison results, at least one of the infrared sensor and the image sensor When the output value of the other sensor exceeds the threshold value, the threshold value of the other sensor is changed to a value obtained by subtracting a certain value. The threshold value of the sensor is changed to a value increased by a certain value. As a result, it is possible to provide a human body detection device that can more accurately detect the presence and position of a person in the detection region using two sensors, an infrared sensor and an image sensor.
[0042]
The human body detection device according to the present invention gradually increases the threshold value of the other sensor when the output value of one of the infrared sensor and the image sensor becomes less than or equal to the threshold value. Is. As a result, it is possible to provide a human body detection device that can more accurately detect the presence and position of a person in the detection region using two sensors, an infrared sensor and an image sensor.
[0043]
A human body detection apparatus according to the present invention includes an infrared sensor that outputs a current value by reflection of infrared rays and an image sensor that outputs a luminance value from an image of light in a visible light range, and outputs an output value and a threshold value of the infrared sensor. In the human body detection device that compares the output value of the image sensor with a threshold value and determines the presence or absence of a human body based on the comparison result, the threshold value of the infrared sensor is the relationship between the output value of the image sensor and the threshold value The threshold value of the image sensor is changed based on the relationship between the output value of the infrared sensor and the threshold value. As a result, it is possible to provide a human body detection device that can more accurately detect the presence and position of a person in the detection region using two sensors, an infrared sensor and an image sensor.
[0044]
A human body detection apparatus according to the present invention includes an infrared sensor that outputs a current value by reflection of infrared rays and an image sensor that outputs a luminance value from an image of light in a visible light range, and outputs an output value and a threshold value of the infrared sensor. In the human body detection device that compares and compares the output value of the image sensor with a threshold value and determines the presence / absence of a human body based on the comparison result, when the output value of the infrared sensor exceeds the threshold value, The sensor threshold is changed to a value that is reduced by a certain value, and when the output value of the infrared sensor is less than or equal to the threshold value, the image sensor threshold is changed to a value that is increased by a certain value, and the image When the sensor output value exceeds the threshold value, the infrared sensor threshold value is changed to a value obtained by subtracting a certain value, and the image sensor output value is greater than or equal to the threshold value. When reduced to is to change the threshold value of the infrared sensor to a value increased by a predetermined value. As a result, it is possible to provide a human body detection device that can more accurately detect the presence and position of a person in the detection region using two sensors, an infrared sensor and an image sensor.
[Brief description of the drawings]
FIG. 1 is a basic configuration diagram of a human body detection device showing the configuration of Embodiment 1 of the present invention.
FIG. 2 is a flowchart showing a control operation of the human body detection device showing the configuration of the first embodiment of the invention.
FIG. 3 is a relationship diagram between an output value and a threshold value showing the configuration of the first embodiment of the present invention.
FIG. 4 is a basic configuration diagram of a human body detection device showing the configuration of Embodiment 2 of the present invention.
FIG. 5 is a flowchart showing a control operation of the human body detection device showing the configuration of the second embodiment of the present invention.
FIG. 6 is a relationship diagram between an output value and a threshold value showing the configuration of Embodiment 2 of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Human body detection apparatus, 2 Human body presence detection means, 3 Human body position detection means, 4 Threshold setting means, 5 Human body presence / position determination means, 6 Air conditioning apparatus control means, 7 Infrared sensor, 8 Comparison determination means, 9 Human body presence confirmation Means means, 10 image sensor, 11 comparison determination means, 12 human body position confirmation means, 13 threshold value Th1 changing means, 14 time measuring means, 15 threshold value Th2 changing means.

Claims (4)

  1. An infrared sensor that outputs a current value by reflection of infrared rays and an image sensor that outputs a luminance value from an image of light in the visible light range, and compares the output value of the infrared sensor with a threshold value and outputs the image sensor When the output value of at least one of the infrared sensor and the image sensor exceeds the threshold value in the human body detection device that determines the presence / absence of a human body based on the comparison results Changes the threshold value of the other sensor to a value obtained by subtracting a certain value, and when the output value of the one sensor is less than or equal to the threshold value, the threshold value of the other sensor is increased by a certain value. A human body detection device characterized by changing to a value.
  2. 2. The human body according to claim 1, wherein when the output value of one of the infrared sensor and the image sensor falls from a threshold value to a threshold value, the threshold value of the other sensor gradually increases. Detection device.
  3. An infrared sensor that outputs a current value by reflection of infrared rays and an image sensor that outputs a luminance value from an image of light in the visible light range, and compares the output value of the infrared sensor with a threshold value and outputs the image sensor In the human body detection device that determines the presence or absence of the human body based on the comparison results, the threshold value of the infrared sensor is changed based on the relationship between the output value of the image sensor and the threshold value, and The human body detection device characterized in that the threshold value is changed based on the relationship between the output value of the infrared sensor and the threshold value.
  4. An infrared sensor that outputs a current value by reflection of infrared rays and an image sensor that outputs a luminance value from an image of light in the visible light range, and compares the output value of the infrared sensor with a threshold value and outputs the image sensor When the output value of the infrared sensor exceeds the threshold value, the threshold value of the image sensor is reduced by a certain value in the human body detection device that determines the presence or absence of the human body based on the comparison results. When the output value of the infrared sensor falls from the threshold value to less than the threshold value, the threshold value of the image sensor is changed to a value increased by a certain value, and the output value of the image sensor exceeds the threshold value. When the threshold value of the infrared sensor is changed to a value reduced by a certain value, and when the output value of the image sensor decreases from the threshold value to less than the threshold value, the infrared sensor Human body detecting device and changes the threshold value increased by a predetermined value.
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US8194920B2 (en) 2007-02-16 2012-06-05 Ford Global Technologies, Llc Method and system for detecting objects using far infrared images
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JP5017353B2 (en) * 2009-11-17 2012-09-05 三菱電機株式会社 Air conditioning control system, air conditioner, air conditioning control method, temperature measurement system, and temperature measurement method
WO2013058820A1 (en) * 2011-10-21 2013-04-25 Nest Labs, Inc. User-friendly, network connected learning thermostat and related systems and methods
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JP5787858B2 (en) * 2012-10-05 2015-09-30 三菱電機株式会社 Air conditioning control system, air conditioning control method and program
CN103234259B (en) * 2013-04-27 2016-03-23 宁波奥克斯空调有限公司 Inverter air conditioner control method
JP5868380B2 (en) * 2013-11-27 2016-02-24 キヤノン株式会社 Information processing device
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JP2016171027A (en) * 2015-03-13 2016-09-23 パナソニックIpマネジメント株式会社 Load control device
CN106772656B (en) * 2015-11-19 2019-04-05 上海理工大学 A kind of indoor human body detection method based on infrared sensor array
CN108302705A (en) * 2018-01-03 2018-07-20 珠海格力电器股份有限公司 A kind of air conditioning control method, device, storage medium and air-conditioning

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