JP7368660B2 - Human detection system and floor panel materials - Google Patents

Description

The present invention relates to a human detection system and a floor panel material used in the human detection system.

2. Description of the Related Art Cameras, human sensors, and the like are used in public facilities, stores, residences, and the like to detect people's entry and exit, movement, and the like. Particularly from the viewpoint of privacy protection, it is generally known that a sensor is installed on the floor and the switch is turned on when a person steps on it. For example, Patent Document 1 discloses a human sensor technology in which a piezoelectric element is provided on a floor material.

JP2018-204325A

However, the technology described in the above document requires a power source to drive the sensor inside the flooring, which wastes standby power when not in use for a long period of time, and requires extensive construction work for installation.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a person detection system capable of detecting a person without a dedicated power source.

A person detection system according to the present invention detects a person in an indoor space where an electromagnetic wave source is installed, and includes a grounding antenna laid or installed along the floor surface of the indoor space, and a grounding antenna installed along the floor surface of the indoor space. a detection antenna disposed opposite to the antenna via an insulator; and the electromagnetic wave source that is electrically connected between the detection antenna and the grounding antenna and input from the detection antenna. a sensor circuit section that operates with the power of electromagnetic waves from the source and outputs an output signal according to the power of the electromagnetic waves; and a sensor circuit section that detects the presence or absence of a person near the detection antenna based on the output signal of the sensor circuit section. It is characterized by comprising a part.

In the human detection system, a floor panel material in which the grounding antenna, the insulator, the detection antenna, and the sensor circuit unit are integrally arranged is arranged side by side on the floor surface of the indoor space to create a floor structure. the detection section receives the output signal from the sensor circuit section of each of the floor panel materials, and detects a person who is close to the floor structure based on the output signal of the sensor circuit section. It is also possible to detect the presence or absence.

The person detection system further includes a calculation processing unit that estimates movement of a person based on a detection result of a person detected by each of the detection units of the floor structures arranged side by side on a floor surface of an indoor space. You can also use it as

In each of the floor panel materials, it is preferable that the area of the grounding antenna is 300 cm 2 or more, and the area of the detection antenna is 1 cm 2 or more and 2400 cm 2 or less.

In each of the floor panel materials, it is preferable that the insulator has a wall thickness of 20 mm or more, and forms a gap equal to the wall thickness between the grounding antenna and the detection antenna.

In each of the floor panel materials, the detection antenna preferably has a rectangular shape, and the grounding antenna preferably has a congruent shape with the detection antenna or a similar shape having a larger area than the detection antenna.

The sensor circuit section is a rectifier booster circuit using a Cockcroft-Walton circuit, and the detection section detects a person and a detection antenna based on the height of the output voltage value as the output signal output from the sensor circuit section. The approach of a person to the detection antenna may be detected by detecting coupling with the detection antenna.

The flooring panel according to the present invention is used in a human detection system for detecting people in an indoor space where an electromagnetic wave source is installed, and is a flat grounding panel that is laid or installed on the floor of the indoor space. a flat detection antenna disposed opposite to the grounding antenna via an insulator; electrically connected between the detection antenna and the grounding antenna; It is characterized by comprising a sensor circuit unit that operates with the power of electromagnetic waves from the electromagnetic wave source inputted from the detection antenna and outputs an output signal according to the power of the electromagnetic waves.

Since the human detection system according to the present invention detects a person based on the power of electromagnetic waves from an electromagnetic wave source, it is possible to detect a person without being influenced by the environment in an indoor space. Furthermore, since it operates with the power of electromagnetic waves from the electromagnetic wave source inputted from the detection antenna, it can operate with low power consumption.

Schematic diagram showing the main components of the human detection system Schematic diagram showing an example of the configuration of floor panel material used in a human detection system Block configuration diagram of human detection system Circuit diagram showing an example of the circuit configuration of the sensor circuit section Graph diagram showing the output potential difference of the human detection device with respect to the size of the detection antenna Graph diagram showing the output potential difference of the human detection device with respect to the size of the grounding antenna Graph diagram showing the output voltage of the sensor circuit when the detection antenna is exposed Graph diagram showing the output voltage of the sensor circuit when the human detection antenna is covered with an insulator

Embodiments of the present invention will be described below with reference to the drawings. Note that the following description of preferred embodiments is essentially just an example, and is not intended to limit the present invention, its scope of application, or its uses.

A person detection system is for detecting a person in a space inside a building (hereinafter referred to as an indoor space) where an electromagnetic wave source is installed. In the present disclosure, an indoor space is a space that includes at least a floor surface 53 and is surrounded, for example, in a building by the floor surface 53, a ceiling or a roof, and a wall surface that supports the ceiling or roof. Further, the electromagnetic wave source is one that supplies electromagnetic waves to an indoor space, and electrical appliances such as home appliances and lighting that are originally provided in the indoor space can be used. Specifically, examples of the electromagnetic wave source include one or more electrical appliances selected from the group consisting of a television, a personal computer, an IH heater, and a fluorescent lamp. That is, the human detection system of the present disclosure is characterized in that a weak electromagnetic wave called electromagnetic noise is sufficient as an electromagnetic wave source for operating the system, and there is no need to provide a dedicated power supply device. FIG. 1 shows an example in which fluorescent lamps 10 are arranged as electromagnetic wave sources on the ceiling of an indoor space at predetermined intervals.

In an indoor space, a floor base 50 is constituted by a subfloor material 51 supported by a support member (not shown) provided in a building and a floorboard 52 laid on the subfloor material 51 (Fig. (see 2). On the surface of the floor base 50 (hereinafter referred to as the floor surface 53), rectangular floor panel materials C are arranged side by side. In this embodiment, an example is shown in which the floor structure 5 is constructed by arranging a plurality of floor panel materials C side by side so that their side surfaces abut against each other over the entire floor surface 53 of an indoor space. ing. Note that the configuration of the floor base 50 is not limited to the above. For example, the floor base 50 may be comprised only of the floor underlayment material 51. In this case, the floor panel materials C are arranged side by side on the surface of the subfloor material 51 serving as the floor surface. Furthermore, for example, the floor base 50 may include an insect repellent/waterproof sheet laid on the surface of the floorboard 52. In this case, the floor panel materials C are arranged side by side on a surface of an insect repellent/waterproof sheet or the like as a floor surface. Further, the material of the surface material (for example, the floorboard 52) of the floor base 50 constituting the floor surface 53 is not particularly limited, and known flooring materials such as wood, concrete, tile, and carpet can be used. The same applies to the flooring material 51. Further, a support or the like (not shown) that supports the floorboard 52 may be provided on the subflooring material 51, and a space may be provided between the subflooring material 51 and the floorboard 52 to pass a cable or the like (not shown).

Note that FIG. 1 shows an example in which eight floor panel materials C are arranged side by side in the left-right direction in the drawing in an indoor space. Further, in FIG. 1, for convenience of explanation, the floor panel materials C are designated with symbols C11, C12, . . . , C18 in order from the left side of the first row from the back of the drawing. Similarly, from the left side of the second row from the back of the drawing, numbers C21, C22, ..., C28 are given, and from the left side of the third row from the back of the drawing, numbers are given C31, C32, ..., C38. ing.

FIG. 2 is a schematic diagram showing a configuration example of the floor panel material C, and is a diagram in which the floor panel material C is broken at an intermediate position in the direction along the floor surface 53. Further, FIG. 3 is a block diagram of the human detection system.

As shown in FIG. 2, the floor panel material C includes a planar grounding antenna 21 installed on a floor surface 53, and a surface disposed opposite to the grounding antenna 21 via an insulator 22. It includes a shaped detection antenna 23 and a sensor circuit section 24 that outputs an output signal according to the power of electromagnetic waves input to the detection antenna 23.

The grounding antenna 21 is an antenna for grounding the floor panel material C, and is provided in the shape of a flat plate along the floor surface 53, for example, on the floor-side end surface of the floor panel material C. The shape of the grounding antenna 21 in a plan view of the floor panel material C from the ceiling side is not particularly limited, and may be, for example, a rectangular shape, a substantially polygonal shape, a substantially circular shape, or the like. Further, the grounding antenna 21 may be formed in a circuit pattern shape such as a spiral or a comb shape, or may have an irregular shape other than a planar shape (for example, a bar shape). Further, the specific form of the grounding antenna 21 is not particularly limited, but for example, one or more types selected from the group consisting of a metal plate, metal foil, metal vapor-deposited sheet, and metal rod may be suitably used. I can do it. Preferably, the grounding antenna 21 has a shape congruent with the detection antenna 23 (same shape in plan view) or a similar shape having a larger area than the detection antenna 23 in plan view.

The material of the grounding antenna 21 is preferably a conductive material, for example, metal. Further, the area of the grounding antenna is preferably 300 cm ² or more from the viewpoint of improving detection accuracy, and more preferably 300 cm ² or more and 9600 cm ² or less from the viewpoint of ease of installation. Note that although specific illustration is omitted, the surface of the grounding antenna 21 may be covered with an insulating layer such as an insulating film from the viewpoint of increasing durability. Further, the grounding antenna 21 does not need to be provided on the end surface of the floor panel material C on the floor surface 53 side, and may be provided at an intermediate position in the thickness direction of the floor panel material C.

The detection antenna 23 is an antenna for receiving electromagnetic waves generated from an electromagnetic wave source (the fluorescent lamp 10 in FIG. 1), and is arranged so as to be located closer to the electromagnetic wave source than the grounding antenna 21. In the case of the floor panel material C, since the electromagnetic wave source is on the indoor space side, the detection antenna 23 is, for example, installed in a flat plate shape on the end surface of the floor panel material C on the indoor space side so as to face the grounding antenna 21. It is set in.

The shape of the detection antenna 23 in plan view is not particularly limited, and may be, for example, a rectangular shape, a substantially polygonal shape, a substantially circular shape, or the like. Further, the grounding antenna 21 may be formed in a circuit pattern shape such as a spiral or a comb shape, or may have an irregular shape other than a planar shape (for example, a bar shape). Further, the specific form of the detection antenna 23 is not particularly limited, but for example, one or more types selected from the group consisting of a metal plate, metal foil, metal vapor-deposited sheet, and metal rod may be suitably used. I can do it. Preferably, the detection antenna 23 has a shape congruent with the grounding antenna 21 (same shape in plan view), or a similar shape with a smaller area than the grounding antenna 21 in plan view.

The material of the detection antenna 23 is preferably a conductive material, for example, metal. Further, the area of the detection antenna 23 is preferably 1 cm ^{2 or} more and 2400 cm ² or less, more preferably 1 cm ^{2 or} more and 1200 cm ² or less, from the viewpoint of improving detection accuracy. Furthermore, from the viewpoint of improving the ease of designing the input stage of the detection section provided after the sensor circuit section 24, for example, it is easy to set the threshold value of the transistor provided at the input stage of the detection section 25 to an intermediate potential (for example, 3V), it is more preferable that the area of the detection antenna 23 is 600 cm ² or more and 1200 cm ^{2 or} less. Although not shown in detail, the detection antenna 23 may have its surface covered with an insulating layer such as an insulating film in order to increase durability. Further, the detection antenna 23 does not need to be provided on the end face of the floor panel material C on the indoor space side, and may be provided at an intermediate position in the thickness direction of the floor panel material C.

The insulator 22 is interposed between the detection antenna 23 and the grounding antenna 21. In other words, the detection antenna 23 and the grounding antenna 21 are separated by a gap equal to the thickness of the insulator 22. Here, the detection antenna 23 and the grounding antenna 21 are arranged facing each other, and since coupling may occur between them, a gap is created by sandwiching the insulator 22 between them. There is. Further, by creating a gap with the insulator 22, a circuit for a sensor or a communication module can be mounted inside the insulator 22.

The thickness of the insulator 22 is not particularly limited, but preferably has a thickness of 20 mm or more, for example. By setting the thickness of the insulator 22 to 20 mm or more, a gap of 20 mm or more is secured between the grounding antenna 21 and the detection grounding antenna 21, reducing noise when detecting people, and making it easier for each installation location. calibration is not necessarily required. The type of insulator 22 is not particularly limited as long as it does not cause a short circuit between the detection antenna 23 and the grounding antenna 21, but examples include rubber, wood board, tile, carpet, concrete, brick, styrofoam, and resin. One or more insulating materials selected from the group consisting of plates can be used.

The sensor circuit section 24 is a circuit section electrically connected between the grounding antenna 21 and the detection antenna 23. The sensor circuit section 24 operates with the power of electromagnetic waves from an electromagnetic wave source (the fluorescent lamp 10 in FIG. 1) inputted from the detection antenna 23, and outputs an output signal according to the power of the electromagnetic waves inputted to the detection antenna 23. Output. For example, when a human body approaches the detection antenna 23, the human body and the detection antenna 23 are electrically coupled, and as a result, the output signal (for example, output voltage) output from the sensor circuit section 24 changes. . In the following description, this will be simply described as a change in output voltage.

It is preferable that the sensor circuit unit 24 is provided in a position where the grounding antenna 21 and the detection antenna 23 are separated from each other, but as described above, the It may be built into the body 22. With this configuration, the detection antenna 23, the sensor circuit section 24, the insulator 22, and the grounding antenna 21 are configured in an integral block shape, making the entire structure compact. Furthermore, it is possible to prevent a person from stepping on the sensor circuit section 24 and damaging it.

FIG. 4 shows an example of the configuration of the sensor circuit section 24. As shown in FIG. The sensor circuit section 24 is configured to rectify the power of the electromagnetic wave (environmental electromagnetic wave) input to the detection antenna 23 into direct current, boost the voltage, and output it. In the example of FIG. 4, a Cockcroft-Walton circuit 241 is used as the booster circuit. The Cockcroft-Walton circuit 241 is a circuit that rectifies and boosts the AC input input from the input terminal IN and outputs the rectified and boosted AC input, and is characterized by having a small number of parts and a simple circuit configuration. Specifically, as shown in FIG. 4, the Cockcroft-Walton circuit 241 is configured using a diode such as a Schottky diode (reverse current 0.5 μA) and a capacitor such as a polypropylene film capacitor or a ceramic capacitor. Further, in the example of FIG. 4, a switch 242 is inserted between each stage of the cascade connection and the output terminal OUT, so that the step-up ratio can be changed. Further, a variable resistor 243 and a capacitor 244 are connected in series between the output terminal OUT and the ground.

Generally, the voltage of the electromagnetic waves received by the detection antenna 23 from the electromagnetic wave source (electrical appliances such as home appliances and lighting originally provided in indoor spaces) assumed in this disclosure is about several mV. Therefore, in the present disclosure, the sensor circuit unit 24 converts the AC input received from the detection antenna 23 into DC, boosts the voltage, and outputs the voltage to the detection unit 25 at the subsequent stage. Note that in the configuration of the present disclosure, the proximity of a person is detected based on the electrical coupling (also referred to as capacitive coupling or simply coupling) between the human body and the detection antenna 23, so Detection is possible even when there is a shield between the detection antenna 23 and the detection antenna 23. Further, the power received (collected) by the detection antenna 23 is maximum when the human body is in contact with the detection antenna 23, and decreases as the human body moves away from the detection antenna 23. Details will be specifically explained later.

Returning to FIG. 3, as described above, when the person P approaches the detection antenna 23, the person P and the detection antenna 23 are electrically coupled, and the amplitude of the electromagnetic waves received from the detection antenna 23 changes. That is, the output voltage from the sensor circuit section 24 changes. The detection unit 25 detects that a person is approaching the detection antenna 23 based on the output voltage from the sensor circuit unit 24, that is, the presence of a person. FIG. 3 shows an example of the circuit of the detection section 25, and when the output voltage from the sensor circuit section 24 exceeds a predetermined threshold, the transistor 251 is turned on and the light emitting diode 252 is turned on. There is. Note that in FIG. 3, a power source is used to drive the light emitting diode 252 of the detection section 25, but the detection section 25 can also be configured without using a power source using another configuration.

The results detected by the detection unit 25 of each floor panel material C are collected, for example, in a communication device 30 provided under the floor, as shown in FIG. etc., and displayed on the display 42 etc. connected to the server device 40. In this way, by collecting and processing the results from a plurality of floor panel materials C, it becomes possible to detect and estimate not only the presence or absence of a person P in the indoor space but also the behavior of the person. Specifically, since it is possible to detect that the person P has stepped on a certain floor panel material C and then stepped on another adjacent floor panel material C, the movement of the person P can be estimated or detected. More specifically, when a person P enters the indoor space from the door D and moves as shown by the arrow in FIG. It turns out that the person P is detected, and then people are detected in the order of the floor panel materials C13, C14, C15, C25, and C35. It is possible to estimate or detect the movement route of a person in an indoor space. The calculation result of the movement route of the person P by the calculation processing unit 41 is displayed on the display 42, for example.

(Experiment example 1)
First, in order to verify the size of the detection antenna 23, the following experiment was conducted.

As a common ground for the sensor circuit section 24 and the grounding antenna 21, aluminum foil (1N30 manufactured by Toyo Aluminum Co., Ltd., thickness 20 μm, size 80 cm x 120 cm = 9600 cm ² ) is laid on the floor to serve as a common ground for the commercial power source. Connected via a capacitor.

Then, an experimental table (corresponding to the insulator 22) for people to sit on was installed on an aluminum foil spread on the floor. The experimental table was made of ceramic tiles and had a size of 30 cm x 50 cm and a thickness of 5 cm. The sensor circuit unit 24 was placed 1 m from the floor, and the subject stood on the insulator 22 to create a gap (60 mm) between the human body and the grounding antenna 21.

Further, a detection antenna 23 was placed above the experimental table, and the output voltage (hereinafter also simply referred to as output voltage) from the sensor circuit section 24 was measured while changing the size of the detection antenna 23. The sizes of the detection antenna 23 were 5 cm x 7.5 cm, 7.5 cm x 10 cm, 10 cm x 15 cm, 15 cm x 20 cm, 20 cm x 30 cm, 30 cm x 40 cm, 40 cm x 60 cm, 60 cm x 80 cm, and 80 cm x 120 cm. In addition, there were two measurement conditions: ``A) The subject approaches and touches the human detection antenna,'' and ``B) The subject moves 1 meter away from the human detection antenna.''

FIG. 5 shows the size of each detection antenna 23 on the horizontal axis, and shows the output voltage under conditions A) and B) and the output voltage difference between conditions A) and B) for each size. It is. In other words, the output voltage difference between conditions A) and B) indicates the difference in output voltage depending on whether the person P is present or not.

As shown in FIG. 5, under both conditions A) and B), the larger the size of the detection antenna 23, the higher the output voltage. Regarding the output voltage difference under conditions A) and B), the larger the size of the detection antenna 23, the smaller the voltage difference. Furthermore, when the size of the person detection antenna was 60 cm x 80 cm and 80 cm x 120 cm, the output voltage was higher when no person was nearby.

Regarding the output voltage difference, as the size of the detection antenna 23 increases, the output voltage difference depending on the presence or absence of a person decreases, so a smaller size of the detection antenna 23 is suitable as a human detection sensor. However, in principle, a person cannot be detected unless the person is on the antenna surface of the detection antenna 23, so if the detection antenna 23 is small, detection can only be made in a narrow range.

Here, the output voltage difference is 0.76V for 30cm x 40cm, and 0.12V for 40cm x 60cm. Therefore, the size of the detection antenna 23 is preferably up to 30 cm x 40 cm = 1200 cm ² .

Note that when a 3V-based circuit is used as the detection section 25, an output voltage of about 3V is required from the sensor circuit section 24. On the other hand, when the size of the detection antenna 23 is 5 cm x 7.5 cm, the output voltage under condition A) is 2.72 V, but for example, by increasing the number of step-up stages of the Cockcroft-Walton circuit 241, the output voltage can be adjusted.

(Experiment example 2)
Next, the following experiment was conducted to verify the size of the grounding antenna 21. In Experimental Example 1, the ground of the sensor circuit section 24 was connected to the ground of the commercial power supply, but in Experimental Example 2, the ground of the sensor circuit section 24 was connected to the grounding antenna 21 made of aluminum foil (1N30 manufactured by Toyo Aluminum, 20 μm). (Thickness and size will be explained later) and placed on the floor.

In Experimental Example 2, an experiment was conducted by changing the area of the grounding antenna 21. Specifically, the sizes of the grounding antenna 21 are 5 cm x 7.5 cm, 7.5 cm x 10 cm, 10 cm x 15 cm, 15 cm x 20 cm, 20 cm x 30 cm, 30 cm x 40 cm, 40 cm x 60 cm, 60 cm x 80 cm, 80 cm x The experiment was conducted with a distance of 120 cm. In addition, evaluations were also conducted in the case where there was no grounding antenna 21 and in the case where the grounding antenna 21 was connected to the ground of a commercial power source instead of installing it. Further, the size of the detection antenna 23 was 30 cm x 40 cm, and the size of the experimental table was larger than the size of the detection antenna 23.

The experimental environment and measurement conditions other than those described above are the same as those in "Experimental Example 1" above, and detailed explanation thereof will be omitted here.

In FIG. 6, the size of each grounding antenna 21 is plotted on the horizontal axis, and the output voltage under conditions A) and B) and the output voltage difference between conditions A) and B) are shown for each size. It is. Similar to "Experimental Example 1", the output voltage difference between conditions A) and B) indicates the difference in output voltage depending on the presence or absence of a person.

As shown in FIG. 6, the output voltage of the sensor circuit section 24 was 3 V or more when the size of the grounding antenna 21 was 15 cm x 20 cm or more. Further, under condition B where no person was nearby, the output voltage of the sensor circuit section 24 was 2.12V when the size of the grounding antenna 21 was 80 cm x 120 cm. Therefore, the size of the grounding antenna is preferably 15 cm x 20 cm or more and 80 cm x 120 cm or less. Since the output voltage difference due to the presence or absence of a person increased as the size of the grounding antenna 21 increased, it is preferable that the size of the grounding antenna 21 be as large as possible within the above range.

(Experiment example 3)
Next, an experiment was conducted to verify the thickness of the insulator 22 interposed between the detection antenna 23 and the grounding antenna 21. When embedding the sensor circuit in an insulator, the thickness of the insulator 22 must be greater than the thickness of the sensor circuit portion 24. Further, from the viewpoint of preventing coupling between the detection antenna 23 and the grounding antenna 21, it is preferable to create a sufficient gap between the two. When the detection antenna 23 and the grounding antenna 21 are arranged facing each other, both antennas 23 and 21 form a capacitor. The ease of coupling between the detection antenna 23 and the grounding antenna 21 depends on the capacitance between both antennas 23 and 21, that is, the area of both antennas 23 and 21 and the distance between them. Depends on. Based on the above background, we evaluated how much of a gap is required between the antennas 23 and 21 to stably detect the person P.

In Experimental Example 3, in the same experimental environment as Experimental Example 1, the output voltage of the sensor circuit section 24 was evaluated when the thickness of the insulator was 4 mm, 20 mm, 40 mm, 60 mm, 80 mm, and 100 mm. In addition, in Experimental Example 3, two measurement conditions were used: "A) a person stands on the floor panel material C" and "B) a person stands at a distance of 1 m from the floor panel material C". In addition, from the viewpoint of preventing deterioration due to exposure of the human detection antenna, evaluations were made for the case where the detection antenna 23 was covered with an insulating layer having a thickness of 4 mm, in addition to the case where the detection antenna 23 was exposed.

In FIGS. 7 and 8, the thickness of the insulator 22 is plotted on the horizontal axis, and the output voltage under condition A) and condition B) is shown for each thickness. FIG. 7 is a graph when the detection antenna 23 is exposed, and FIG. 8 is a graph when the detection antenna 23 is covered with an insulating layer having a thickness of 4 mm.

As shown in FIG. 7, for condition A), it was confirmed that by increasing the thickness of the insulator 22, the output voltage increased. Further, when the thickness of the insulator 22 was 4 mm, the output voltage between condition A) and condition B) was almost the same. Therefore, the thickness of the insulator 22 is preferably greater than 4 mm, particularly preferably 20 mm or more. Note that in condition A) where a person is present, the output voltage exceeds 3V when the thickness of the insulator 22 is 40 mm or more, so it is more preferably 40 mm or more. Note that the thickness of the insulator 22 of 40 mm is sufficient for a space in which the sensor circuit section 24 is mounted.

As shown in FIG. 8, even when the detection antenna 23 was covered with the insulator 22 with a thickness of 4 mm, the same output voltage as in the case of FIG. 7 was obtained, although a slight decrease in the output voltage was observed. Specifically, when the thickness of the insulator 22 was 40 mm, the output voltage was 2.84V. Although this output voltage is lower than 3V, this result suggests that it can be sufficiently utilized even in a 3V system circuit.

(Experiment example 4)
Next, an evaluation experiment was conducted on a sensor node in which the grounding antenna 21, the insulator 22, the detection antenna 23, and the sensor circuit section 24 were integrated. Specifically, assuming installation in an indoor space, an indoor mat (made of non-conductor, 5 mm thick) is placed on top of the sensor node, and when a person P is on top of the sensor node (in the vicinity The presence or absence of detection was evaluated for cases in which a book was placed on top of the device (corresponding to the case in which a book was placed) and a case in which a book was placed on top of the device. People were evaluated with socks and shoes on. In addition, as electromagnetic wave sources, fluorescent lights, IH cooking heaters (IH cooking heater IHK-T41-B, 1400W output, manufactured by Iris Ohyama), PCs (BTO desktop computers, manufactured by Unitcom Co., Ltd.), and TVs (LC-40U45, manufactured by Sharp Corporation) were used. We prepared and evaluated each device by turning it on and off. Further, regarding electromagnetic wave sources other than the fluorescent lamp 10, evaluation was performed by changing the distance from the electromagnetic wave noise source to the detection antenna 23 to 20 cm and 50 cm.

Tables 1 and 2 below show the evaluation results of Experimental Example 4. Table 1 shows the evaluation results when the distance from the electromagnetic wave source to the detection antenna 23 is 20 cm, and Table 2 shows the evaluation results when the distance is 50 cm. In Tables 1 and 2, when there is nothing in the indoor space and the person P is wearing socks and is on the detection antenna 23, the person P is wearing socks and shoes and is on the detection antenna 23. The results are shown when a book weighing 5 kg was placed on the detection antenna 23 instead of a person. In addition, the results are shown when measured with a pressure-sensitive sensor (MF02-N-221-A01 manufactured by Taiwan Alpha Electronic) and when measured using the method of this embodiment (described as "electromagnetic noise method" in the table). It shows. Regarding the human detection system (electromagnetic wave noise type) of the present disclosure, when the output voltage of the sensor circuit unit 24 is 2.0V or more and it is determined to be detected, it is marked "○", and when the output voltage is 2.0V or less, it is marked "○". Items that were not determined to be detected were evaluated as "×".

As shown in Table 1, while the pressure-sensitive human sensor of the prior art is capable of detecting a person, it can be seen that it incorrectly detects when a heavy object such as a book is placed on the sensor. In contrast, the human detection system of the present disclosure was able to detect people as expected when the fluorescent lamp, PC, IH, and TV were turned on at a distance of 20 cm from the electrical appliance. Furthermore, when all electrical appliances are turned on (described as "ALL" in the table), false detection may occur when the person P is not on the sensor node.

Furthermore, as shown in Table 2, the detection results were as expected when the distance from the electrical appliance was 50 cm and the fluorescent lamp, PC, and all electrical appliances were turned on. On the other hand, IH could not be detected even if there were people present. Regarding TV, the results showed that it could be detected when a person was wearing socks, but not when a person was wearing shoes.

From the above results, the human detection system of the present disclosure is capable of detecting a person even without a dedicated power source. Furthermore, depending on the type and arrangement of the electromagnetic wave source, it is possible to improve the accuracy of human detection compared to conventional pressure-sensitive human sensors.

To summarize the above, in this embodiment, a human detection system for detecting a person in an indoor space where an electromagnetic wave source (for example, a fluorescent lamp 10) is installed is provided. Alternatively, the installed grounding antenna 21 and the detection antenna 23 placed opposite to the grounding antenna 21 with the insulator 22 interposed therebetween, and the electrical connection between the detection antenna 23 and the grounding antenna 21 a sensor circuit section 24 that operates with the power of electromagnetic waves from the electromagnetic wave source inputted from the detection antenna 23 and outputs an output signal according to the power of the electromagnetic waves; The present invention is characterized in that it includes a detection section 25 that detects the presence or absence of a person near the detection antenna 23.

According to this configuration, a person is detected based on the power of electromagnetic waves from an electromagnetic wave source, so a person can be detected without being influenced by the environment in an indoor space. Moreover, since it operates with the power of electromagnetic waves from the electromagnetic wave source inputted from the detection antenna 23, it can operate with low power consumption.

In the above-mentioned human detection system, by arranging the floor panel material C in which the grounding antenna 21, the insulator 22, the detection antenna 23, and the sensor circuit section 24 are integrally arranged on the floor surface 53 of the indoor space. Configuring the floor structure 5, the detection section 25 receives the output signal from the sensor circuit section 24 of each floor panel material C, and detects a person near the floor structure based on the output signal of the sensor circuit section 24. It may also be possible to detect the presence or absence of.

By integrating it into the floor panel material C in this manner, installation on the floor surface 53 becomes easy. Furthermore, by further including a calculation processing unit that estimates the movement of a person based on the detection result of the person, the movement of the person can be estimated and detected.

<Other embodiments>
In addition, in the said embodiment, although the calculation processing part 41 for estimating or detecting a person's movement was provided outside the floor panel material C, it is not limited to this. For example, the arithmetic processing section 41 may be incorporated into the sensor circuit section 24. That is, the calculation processing section 41 may be incorporated into one or more floor panel materials C.

Further, in the above embodiment, an example is shown in which the grounding antenna 21, the detection antenna 23, and the sensor circuit section 24 are built into the floor panel material C, but the invention is not limited to this. The antenna 23 and the sensor circuit section 24 may be constructed separately and installed on the floor surface 53, respectively.

INDUSTRIAL APPLICATION This invention can detect a person even without a dedicated power supply, and is extremely useful.

5 Floor structure 10 Fluorescent lamp (electromagnetic wave source)
21 Grounding antenna 22 Insulator 23 Detection antenna 24 Sensor circuit section 241 Cockcroft-Walton circuit 25 Detection section 53 Floor surface C Floor panel material

Claims (8)

A person detection system for detecting a person in an indoor space where an electromagnetic wave source is installed,
comprising: a floor panel material installed side by side on a floor base composed of a floor base material and a floorboard in the indoor space; and a detection unit that detects the presence or absence of a person;
The floor panel material is
a detection antenna disposed on the side of the electromagnetic wave source to receive electromagnetic waves generated from the electromagnetic wave source;
a grounding antenna arranged opposite to the detection antenna with an insulator interposed therebetween ;
It is electrically connected between the detection antenna and the grounding antenna, operates with the power of electromagnetic waves from the electromagnetic wave source input from the detection antenna, and outputs an output signal according to the power of the electromagnetic waves. sensor circuit section and
Equipped with
The grounding antenna has a gap that does not cause capacitive coupling with the detection antenna in order to ground the floor panel material,
The person detection system is characterized in that the detection section detects the presence or absence of a person near the detection antenna based on the output signal of the sensor circuit section. The floor panel material integrally includes the grounding antenna, the insulator, the detection antenna, and the sensor circuit section, and is arranged side by side on the floor of the indoor space to form a floor structure. configure,
The detection unit receives the output signal from the sensor circuit unit of each of the floor panel materials, and detects the presence or absence of a person near the floor structure based on the output signal of the sensor circuit unit. The person detection system according to claim 1, characterized in that: Claim further comprising: an arithmetic processing unit that estimates movement of a person based on a detection result of a person detected by each of the detection units of the floor structures arranged side by side on a floor surface of an indoor space. The person detection system described in Section 2. 3. The person detection system according to claim 2, wherein in each of the floor panel materials, the area of the grounding antenna is 300 cm2 or more, and the area of the detection antenna is 1 cm2 or more and 2400 cm2 or less. In each of the floor panel materials, the insulator has a wall thickness of 20 mm or more, and forms a gap equal to the wall thickness between the grounding antenna and the detection antenna. The person detection system according to claim 2 or 4. In each of the floor panel materials, the detection antenna has a rectangular shape, and the grounding antenna has a congruent shape with the detection antenna or a similar shape having a larger area than the detection antenna. A person detection system according to any one of claims 2, 4, and 5. The sensor circuit section is a rectifier booster circuit using a Cockcroft-Walton circuit,
The detection unit detects the coupling between the person and the detection antenna based on the height of the output voltage value as the output signal output from the sensor circuit unit, so that the person approaches the detection antenna. The person detection system according to any one of claims 1 to 4, characterized in that the person detection system detects a person who has done something. A floor panel material used in a human detection system for detecting people in an indoor space where an electromagnetic wave source is installed,
a detection antenna disposed on the side of the electromagnetic wave source to receive electromagnetic waves generated from the electromagnetic wave source;
a grounding antenna arranged opposite to the detection antenna with an insulator interposed therebetween ;
It is electrically connected between the detection antenna and the grounding antenna, operates with the power of electromagnetic waves from the electromagnetic wave source input from the detection antenna, and outputs an output signal according to the power of the electromagnetic waves. and a sensor circuit section to
A floor panel material, wherein the grounding antenna has a gap that prevents capacitive coupling from occurring between the grounding antenna and the detection antenna in order to ground the floor panel material.

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