JP6775908B2 - Person position detection device, person position detection system, person position detection method and program - Google Patents

Description

The present invention relates to a person position detection device using a wireless communication device, a person position detection system, a person position detection method, and a program.

An existence detection system that detects whether or not a person is present in the space by utilizing the fact that the RSSI (Received Signal Strength Indication) of radio waves fluctuates according to the movement of a person in the space of a multipath environment. Has been proposed.

Patent Document 1 discloses a technique for detecting whether or not a person exists indoors based on fluctuations in reception level due to an indoor multipath environment using broadcast radio waves such as TV broadcast waves and FM broadcast waves. ing. Patent Document 2 discloses a technique for detecting whether or not a person is present in a room by determining whether or not the amount of change in RSSI when receiving a radio wave output by a wireless access point exceeds a threshold value. There is. Patent Document 3 discloses a technique for detecting whether or not a person is present in a room and the number of people present based on the standard deviation of RSSI.

Japanese Unexamined Patent Publication No. 2006-22213 International Publication No. 2009/125627 JP-A-2010-54098

All of the above-mentioned techniques can detect whether or not a person exists in the space to be detected, but cannot detect where the person exists in the space. Therefore, for example, in the control of an air conditioner, it is possible to perform simple air conditioning control in which the air conditioner is activated when a person is present in the room to be air-conditioned and the air conditioner is stopped when the person is not present. It is not possible to perform detailed air conditioning control according to the situation.

The present invention has been made in view of the above circumstances, and provides a human position detection device, a human position detection system, a human position detection method, and a program capable of detecting the presence or absence of a person and the presence position of a person. The purpose.

The person position detection device according to the present invention is a person position detection device connected to a receiver that receives radio waves emitted by a transmitter and propagated by multipath propagation, and is a communication means, a storage means, and a feature amount calculation means. And a detection means. The communication means acquires the received signal strength related to the radio wave received by the receiver as the received signal strength information from the receiver. The storage means stores the position where the transmitter and the receiver are arranged as arrangement information, and stores the received signal strength information as a history of the received signal strength. The feature amount calculation means calculates the feature amount based on the history of the received signal strength. In the detection means, the presence of a person in the space to be detected and the position of the person in the space to be detected are determined by the feature amount in the radio wave propagating by multi-path propagation of the transmitter. Based on the fact that there is a correspondence relationship depending on the placement position, the placement position of the receiver, and the existence position of a person, the correspondence relationship is applied to the placement information to detect based on the placement information and the feature amount.

According to the present invention, by estimating the existence position of a person based on the arrangement information of the transmitter and the receiver and RSSI, not only whether or not the person exists in the space to be detected but also the existence of the person The position can also be detected.

Top view showing an example in a room in which a person position detection system according to an embodiment is introduced. Block diagram of the person position detection system according to the embodiment Block diagram of the receiver according to the embodiment Block diagram of the air conditioning controller according to the embodiment Graph showing RSSI when there is no person in the space to be detected Graph showing RSSI when a person exists in the space to be detected The figure which shows the positional relationship of a receiver, a transmitter and a person Graph showing RSSI when there is a person between the transmitter and the receiver Graph showing RSSI when there is no person between the transmitter and receiver Graph showing RSSI when there is no person between the transmitter and receiver A flowchart showing the operation of the person position detection system according to the embodiment. The figure which shows the person distribution map which concerns on embodiment Top view showing an example in a room in which a person position detection system according to a modified example of the embodiment is introduced.

(Embodiment)
The person position detection device, the person position detection system, the person position detection method, and the program according to the embodiment of the present invention will be described with reference to FIGS. 1 to 9.

The configuration of the person position detection system 1 will be described with reference to FIGS. 1 and 2. The person position detection system 1 is a system that sets the inside of the room 40 as the space to be detected and detects whether or not the person 401 exists in the room 40 and the position where the person 401 exists. The person position detection system 1 is arranged at an appropriate position in the room 40, the transmitter 10 arranged near the center in the room 40, the four receivers 20a-20d arranged near the four corners of the room 40, and the four receivers 20a-20d. The air-conditioning control device 30 is provided. The transmitter 10 emits radio waves and transmits a wireless signal to each receiver 20 through the wireless communication path 50. The air conditioning control device 30 communicates with each receiver 20 through the wired communication path 60. Further, the air conditioning control device 30 controls the air conditioner 70 via the wired communication path 60 according to the human position detection result.

Some of the radio waves emitted by the transmitter 10 propagate directly to the receiver 20, while others hit the walls, desks, people 401, etc. in the room 40 and propagate to the receiver 20 while being reflected and attenuated. That is, the room 40 is a multipath environment. It is desirable that the transmitter 10 emits radio waves at all times or at regular intervals. Further, in order to be able to transmit radio waves in each direction, it is desirable that the transmitting antenna included in the transmitter 10 is an antenna having a weak directivity such as a dipole antenna.

As the transmitter 10, various wireless devices can be used as long as they do not move for a certain period of time or more and emit radio waves that can be received by the receiver 20. For example, a wireless sensor terminal provided with environmental sensors such as a temperature sensor, a humidity sensor, and an illuminance sensor and transmitting environmental information to each receiver 20 by wireless communication can be used as the transmitter 10. Further, a remote controller for a building air conditioner, an access point for a wireless LAN (Local Area Network), a PC (Personal Computer) that communicates by wireless LAN, and the like can also be used as the transmitter 10. However, when a notebook PC is used as the transmitter 10, it cannot be used as the transmitter 10 while the notebook PC is being transported.

The receiver 20 receives the radio wave emitted by the transmitter 10. As shown in FIG. 3, the receiver 20 includes a receiving antenna 201 that receives radio waves emitted by the transmitter 10, a receiving circuit 202 that processes radio waves received by the receiving antenna 201, and radio waves processed by the receiving circuit 202. The RSSI measurement circuit 203 for measuring RSSI (Received Signal Strength Indication), the receiving circuit 202 and the RSSI measurement circuit 203 are controlled, and the RSSI measured by the RSSI measurement circuit 203 is used as RSSI information via the communication unit 205. It includes a reception control unit 204 for transmitting to the air conditioning control device 30, and a communication unit 205 for communicating with the air conditioning control device 30 via a wired communication path 60.

The receiving antenna 201 receives the radio wave emitted by the transmitter 10, converts it into an electric signal, and outputs it to the receiving circuit 202. In order to be able to receive radio waves from each direction, it is desirable that the receiving antenna 201 has a weak directivity, like the transmitting antenna included in the transmitter 10.

The reception circuit 202 performs signal processing on the electric signal output by the reception antenna 201 based on the control of the reception control unit 204. Signal processing includes amplifying an electric signal with an amplifier circuit, applying a band limiting filter to the electric signal, and extracting only an electric signal having a frequency related to a radio wave emitted by a transmitter. The receiving circuit 202 outputs the signal-processed electric signal to the RSSI measurement circuit 203.

The RSSI measurement circuit 203 measures the RSSI of the electric signal acquired from the reception circuit 202 based on the control of the reception control unit 204, and outputs the RSSI information to the reception control unit 204 as RSSI information.

The reception control unit 204 controls the reception circuit 202 and the RSSI measurement circuit 203, and acquires RSSI information from the RSSI measurement circuit 203. Further, RSSI information is transmitted to the air conditioning control device 30 via the communication unit 205.

The air conditioning control device 30 functions as a person position detecting device. As shown in FIG. 4, the air conditioning control device 30 acquires RSSI information from each of the communication unit 301 that communicates with each receiver 20 and the air conditioner 70 via the wired communication path 60, and the storage unit 303. When the detection unit 304 stores the arrangement positions of the control unit 302 that controls the detection unit 304, the feature amount calculation unit 305, and the air conditioner 70, the transmitter 10 and each receiver 20 as arrangement information, and the detection unit 304 performs detection. A storage unit 303 and a storage unit that store information related to the person distribution map to be created, store RSSI information acquired by the control unit 302 as an RSSI history, and store a threshold used when the detection unit 304 performs detection. Based on the feature amount calculation unit 305 that calculates the feature amount from the RSSI history stored in 303, the arrangement information and threshold value stored in the storage unit 303, and the RSSI feature amount calculated by the feature amount calculation unit 305, the person 401 It includes a detection unit 304 that detects the existence and the existence position of the person 401. The person distribution map will be described later.

The storage unit 303 functions as a storage means and includes a storage device such as a RAM (Random Access Memory) and a flash memory. The storage unit 303 stores the arrangement positions of the transmitter 10 and each receiver 20 as arrangement information. Examples of the method of storing the arrangement information in the storage unit 303 include a method in which the user manually inputs the arrangement position by the input device provided in the air conditioning control device 30 after the user arranges the transmitter 10 and each receiver 20. Be done.

Further, the storage unit 303 stores information related to the person distribution map created when the detection unit 304 performs detection. As shown in FIG. 9, the person distribution map is a map in which the inside of the room 40, which is the space to be detected, is divided into grid-like areas. Note that FIG. 9 omits the illustration of the air conditioning controller 30, the air conditioner 70, and the wired communication path 60. The storage unit 303 stores the map division information and the person distribution likelihood of each area. The details of the person distribution map and the person distribution likelihood will be described later. The map division information may be generated and stored in the map division information by having the user divide the map by the input device provided in the air conditioning control device 30, or the map division information may be generated and stored in each transmitter 10 and each receiver 20. Map division information may be automatically generated and stored based on the arrangement information.

Further, the storage unit 303 stores the RSSI acquired from each receiver 20 by the control unit 302 at regular time intervals, for example, every second, and creates a history of RSSIs corresponding to each receiver 20. The RSSI history may be stored as much as necessary for calculating the feature amount described later. For example, the history of the last 30 seconds may be stored. Further, the storage unit 303 stores the threshold value used when the detection unit 304 detects the existence of the person 401 and the existence position of the person 401. The initial value of the threshold value is set in advance.

The control unit 302 acquires RSSI information from each receiver 20 via the communication unit 301 that functions as a communication means, and stores the RSSI information in the storage unit 303 as the history of RSSI. Further, the control unit 302 controls the feature amount calculation unit 305, and causes the feature amount calculation unit 305 to calculate the feature amount of RSSI based on the history of RSSI stored in the storage unit 303. Further, the control unit 302 controls the detection unit 304, and determines the existence of the person 401 and the existence position of the person 401 based on the arrangement information and the threshold value stored in the storage unit 303 and the RSSI feature amount calculated by the feature amount calculation unit 305. Let the detection unit 304 detect. Further, the control unit 302 functions as a control means of the air conditioner, and controls the air conditioner 70 via the communication unit 301 based on the detection result of the detection unit 304. The control of the air conditioner 70 is, for example, to control the wind direction in order to focus the wind on the position where the person 401 exists.

The feature amount calculation unit 305 functions as a feature amount calculation means, and calculates the feature amount of RSSI for each receiver 20 based on the history of RSSI stored in the storage unit 303. The feature amount of RSSI is, for example, the standard deviation calculated from the history of RSSI for the last 30 seconds. Further, the average value or the median value calculated from the history of RSSI for the last 30 seconds may be used as the feature amount.

The detection unit 304 functions as a detection means, and a person is in a room 40 which is a space to be detected based on the arrangement information and the threshold value stored in the storage unit 303 and the RSSI feature amount calculated by the feature amount calculation unit 305. Detects whether or not 401 exists and the position of person 401. The detection method will be described later.

Next, the relationship between the existence position of the person 401 and RSSI will be described.

When there is no person 401 in the room 40, the wireless communication between the transmitter 10 and each receiver 20 is stable. Therefore, as shown in FIG. 5A, the fluctuation range of RSSI of the signal received by each receiver 20 is small within the measurement period.

On the other hand, when the person 401 is present in the room 40, the radio wave emitted by the transmitter 10 hits the person 401 and is reflected and attenuated. In addition, since the person 401 is moving to some extent, there are variations in the way radio waves are reflected and attenuated. Therefore, as shown in FIG. 5B, the fluctuation range of RSSI of the signal received by each receiver 20 is large within the measurement period. Further, the average value and the median value of RSSI calculated from RSSI during the measurement period are smaller than those shown in FIG. 5A.

The fluctuation range, average value, and median value of RSSI during the measurement period change according to the presence position of the person 401. For example, as shown in FIG. 6, when the person 401 is present at the position of reference numeral 401a on the line segment connecting the transmitter 10 and the receiver 20, the fluctuation range of RSSI is large as shown in FIG. 7A. Moreover, the average value and the median value of RSSI are smaller than those shown in FIG. 5A. Of the radio waves emitted by the transmitter 10, the radio waves that are going to propagate directly to the receiver 20 are blocked by the person 401, reflected, and attenuated, resulting in such a measurement result.

On the other hand, for example, in FIG. 6, when the person 401 is present at the position of the reference numeral 401c, the fluctuation range of RSSI is slightly small as shown in FIG. 7B. Moreover, the average value and the median value of RSSI are larger than those shown in FIG. 7A. Of the radio waves emitted by the transmitter 10, a part of the radio waves propagating while being reflected by the wall, desk, etc. in the room 40 is blocked by the person 401, reflected, and attenuated, resulting in such a measurement result.

Further, for example, in FIG. 6, when the person 401 is present at the position of reference numeral 401b or reference numeral 401d, as shown in FIG. 7C, the fluctuation range of RSSI is an intermediate fluctuation range between the case shown in FIG. 7A and the case shown in FIG. 7B. Become. Further, the average value and the median value of RSSI are also the average value and the median value in the middle of the case shown in FIG. 7A and the case shown in FIG. 7B.

As described above, the fluctuation range, the average value, and the median value of RSSI fluctuate depending on whether or not the person 401 exists in the room 40 and the position where the person 401 exists. Therefore, for example, based on the fluctuation range, the average value, or the median value of RSSI, whether or not the person 401 exists in the room 40, and whether the position of the person 401 is around the reference numeral 401a, or around the reference numeral 401b or the reference numeral 401d. It can be estimated whether it is around the reference numeral 401c or not. The standard deviation calculated from RSSI within the measurement period may be used as the feature amount indicating the fluctuation range of RSSI.

Further, when viewed from each receiver 20, the existing positions of the person 401 are relatively different, so that the fluctuation range, the average value, and the median value of RSSI for each receiver 20 are different. The person position detection system 1 uses this fact to detect the existence position of the person 401.

Next, the operation flow of the person position detection system 1 will be described with reference to FIG. In the explanation of this operation flow, the standard deviation of RSSI is adopted as the feature quantity of RSSI.

First, the control unit 302 of the air conditioning control device 30 acquires RSSI information from each receiver 20 at regular intervals for a fixed time, and stores it in the storage unit 303 of the air conditioning control device 30 as a history of RSSI (step S1). .. The fixed time is, for example, 30 seconds, and the fixed interval is, for example, 1 second.

Next, the feature amount calculation unit 305 of the air conditioning control device 30 calculates the standard deviation, which is the feature amount, based on the history of RSSI corresponding to each receiver 20 (step S2). Then, the detection unit 304 of the air conditioning control device 30 creates a person distribution map based on the standard deviation of RSSI, which is a feature amount corresponding to each receiver 20 (step S3).

The flow of creating a person distribution map will be explained. Based on the map division information stored in the storage unit 303, a map is created in which the room 40 is divided into grid-like areas as shown in FIG. Note that FIG. 9 omits the illustration of the air conditioning controller 30, the air conditioner 70, and the wired communication path 60. Next, in each area, the person distribution likelihood, which is the probability that the person 401 exists in the area, is calculated and stored in the storage unit 303. The person distribution likelihood is, for example
Person distribution likelihood = pD _a + qD _b + rD _c + sD _d
It is calculated by the formula represented by. D _i is the standard deviation of the RSSI that corresponds to the receiver 20i. However, the variable i is one of a and d. Coefficients p, q, r, s is a number that is multiplied with the D _i, respectively, take different values for each area. The coefficients p, q, r, and s are predetermined based on the relationship between the existence position of the person 401 shown in FIGS. 6 and 7A-7C described above and RSSI. Incidentally, for greater detection accuracy, complex formula than formulas used in the above example, for example, be used to calculate the human distribution likelihood calculation formula using a quadratic equation for each D _i Good. If the person distribution likelihood is calculated for all areas and stored in the storage unit 303, the person distribution map is completed.

After creating the person distribution map (step S3), the detection unit 304 of the air conditioning control device 30 extracts an area having a person distribution likelihood equal to or higher than the threshold value stored in the storage unit 303 from each area of the person distribution map. (Step S4). Then, the detection unit 304 detects the position in the room 40 corresponding to the area where the person distribution likelihood is equal to or higher than the threshold value as the position where the person 401 exists (step S5). When there are a plurality of extracted areas, it is detected that a person 401 exists at each position in the room 40 corresponding to all the extracted areas. That is, the person position detection system 1 can detect the existence position of each person 401 even when a plurality of people 401 exist in the room 40. When there is no area where the person distribution likelihood is equal to or higher than the threshold value, the detection unit 304 detects that the person 401 does not exist in the room 40.

The control unit 302 of the air conditioning control device 30 controls the air conditioner 70 based on the detection result of the detection unit 304 (step S6). The control of the air conditioner 70 is, for example, to control the wind direction in order to focus the wind on the position where the person 401 exists. Specifically, for example, a control signal for moving the direction of the vanes and flaps of the air conditioner 70 toward the position where the person 401 exists may be transmitted to the air conditioner 70. Further, when it is detected that the person 401 does not exist, the operation of the air conditioner 70 may be stopped to reduce the power consumption.

The air-conditioning control device 30 that realizes the above operation may be configured by dedicated hardware, or may be configured by a combination of a computer system and a dedicated program. A case where the air conditioning control device 30 is configured by combining a microcontroller having a processor, a memory, a storage medium and an interface as a computer system and a dedicated program will be described. Memory is composed of RAM. The storage medium is composed of an auxiliary storage device such as a flash memory, a magnetic disk, or an optical disk, and a dedicated program is stored. The interface realizes the function as the communication unit 301 shown in FIG. The processor reads the dedicated program stored in the storage medium into the memory and executes it, thereby functioning as the control unit 302, the storage unit 303, the detection unit 304, and the feature amount calculation unit 305 shown in FIG. The dedicated program does not have to have all the functions, and even if some functions are realized by the function of the OS (Operating System) running on the microcomputer, and each function is realized by the cooperation of the dedicated program and the OS. Good. Further, instead of storing the dedicated program in the storage medium, the processor may download the dedicated program from the program distribution server on the network via the interface, read it into the memory, and execute it.

The embodiment has been described above. According to the embodiment, the receiver that receives the radio wave emitted by the transmitter and propagated by multipath propagation is used, the feature amount of RSSI is calculated from the RSSI of the radio wave received by the receiver, and the feature amount of RSSI is transmitted. Based on the fact that there is a correspondence relationship between the receiver, the receiver, and the location of the person, the presence of the person and the location of the person are detected based on the arrangement information of the transmitter and receiver and the feature amount of RSSI. be able to.

(Modification example)
In FIG. 1, the transmitter 10 is arranged near the center of the room 40 in order to improve the detection accuracy of the position where the person 401 exists, but it does not necessarily have to be arranged near the center of the room 40. Further, in FIG. 1, only one transmitter 10 is arranged, but a plurality of transmitters 10 may be arranged. When a plurality of transmitters 10 are arranged, the receiver 20 measures the RSSI for the radio waves emitted by the respective transmitters 10 and transmits the RSSI to the air conditioning controller 30. Further, when a plurality of transmitters 10 are arranged, the frequencies of the radio waves emitted by each transmitter 10 are different so that the receiver 20 can distinguish the radio waves emitted from each transmitter 10.

In FIG. 1, one receiver 20 is arranged near the four corners of the room 40 in order to improve the detection accuracy of the position where the person 401 exists, but it does not necessarily have to be arranged near the four corners of the room 40. .. Further, the number of receivers 20 to be arranged does not have to be four as long as they are a plurality of receivers. Further, when a plurality of transmitters 10 are arranged, the number of receivers 20 may be only one.

In FIGS. 1 and 2, the air conditioning controller 30 communicates with each receiver 20 by wired communication, but may communicate by wireless communication. Further, the air conditioning control device 30 may be built in one of the plurality of receivers 20, and the receiver 20 having the built-in air conditioning control device 30 may communicate with the other receivers 20.

As shown in FIG. 10, each receiver 20 may incorporate a transmitter 10, one of the receivers 20 may further incorporate an air conditioning control device 30, and the receivers 20 may communicate wirelessly with each other. Note that FIG. 10 omits the illustration of the air conditioner 70 and the wired communication path 60. In this case, the receiver 20 measures the RSSI of the radio wave received from each of the other receivers 20 and transmits the RSSI information corresponding to each receiver 20 to the air conditioning control device 30.

Even when only one transmitter 10 and one receiver 20 are arranged, the person 401 is around the reference numeral 401a as described above with reference to FIGS. 5A, 5B, 6 and 7A-7C. It is possible to detect whether it exists, exists around reference numeral 401b or 401d, exists around reference numeral 401c, or does not exist in room 40. Therefore, even if only one transmitter 10 and one receiver 20 are arranged, the transmitter is based on the fact that the feature amount of RSSI has a correspondence relationship according to the existence position of the transmitter, the receiver, and a person. It can be said that the person position detection system 1 according to the present invention is configured to detect the existence of the person 401 and the existence position of the person 401 based on the arrangement information of the 10 and the receiver 20 and the feature amount of the RSSI. However, in this case, when a plurality of people 401 exist in a plurality of places in the room 40, the existence position of the person 401 cannot be detected normally.

The air conditioning control device 30 may be connected to the transmitter 10 and the transmitter 10 and the receiver 20 may be controlled according to the detection result of the air conditioning control device 30. For example, when it is detected that the person 401 does not exist in the room 40, the air conditioning control device 30 controls the transmitter 10 and the receiver 20, and lengthens the radio wave transmission interval of the transmitter 10 and the radio wave reception interval of the receiver 20. As a result, power consumption can be reduced. Further, the radio wave transmission interval and the radio wave reception interval are shortened for the transmitter 10 and the receiver 20 arranged around the detected existing position, and the radio wave transmission interval and the radio wave reception for the other transmitter 10 and the receiver 20. By lengthening the interval, it is possible to reduce power consumption while ensuring detection accuracy.

When a person 401 is present in the room 40, the greater the movement of the person 401, the greater the standard deviation of RSSI. Therefore, by preparing a plurality of threshold values used in step S4 of FIG. 8, not only the existing position of the person 401 but also the degree of movement of the person 401 can be detected.

In the embodiment, the standard deviation is adopted as the feature amount of RSSI, but as described above, the average value and the median value of RSSI differ depending on the position of the person, so the calculation formula of the person distribution likelihood should be set appropriately. Therefore, the mean value and the median value can also be adopted as the feature amount of RSSI.

The present invention allows for various embodiments and modifications without departing from the broad spirit and scope. Moreover, the above-described embodiment is for explaining the present invention, and does not limit the scope of the present invention. That is, the scope of the present invention is indicated not by the embodiment but by the claims. And various modifications made within the scope of the claims and within the equivalent meaning of the invention are considered to be within the scope of the present invention.

The present invention can be used for detecting the presence of a person and the position of a person using a transmitter and a receiver in a multipath environment.

1 person position detection system, 10 transmitters, 20, 20a-20d receivers, 30 air conditioning controllers, 40 rooms, 50 wireless communication paths, 60 wired communication paths, 70 air conditioners, 201 receiving antennas, 202 receiving circuits, 203 RSSI measurement circuit, 204 reception control unit, 205 communication unit, 301 communication unit, 302 control unit, 303 storage unit, 304 detection unit, 305 feature amount calculation unit, 401, 401a-401d people

Claims (9)

A person position detection device connected to a receiver that receives radio waves emitted by a transmitter and propagated by multipath propagation.
A communication means for acquiring the received signal strength related to the radio wave received by the receiver as the received signal strength information from the receiver, and
A storage means that stores the position where the transmitter and the receiver are arranged as arrangement information, and stores the received signal strength information as a history of the received signal strength.
A feature amount calculating means for calculating a feature amount based on the history of the received signal strength, and
The feature amount in the radio wave propagating by the multi-path propagation is the presence of a person in the space to be detected and the existence position of the person when the person is present in the space to be detected. Based on the fact that there is a correspondence relationship depending on the arrangement position, the arrangement position of the receiver, and the existence position of a person, by applying the correspondence relationship to the arrangement information, detection is performed based on the arrangement information and the feature amount. Detection means to
A person position detector equipped with. The feature amount calculated by the feature amount calculating means is any one of a standard deviation, a median value, or an average value calculated based on the history of the received signal strength within the most recent fixed period.
The person position detecting device according to claim 1. There are a plurality of sets of transmitters and receivers that transmit and receive radio waves by arranging a plurality of the transmitter and the receiver at least one of them.
The detection means detects the presence of a person and the position of the person when the person is present in the space to be detected, based on the received signal strength related to each pair of the transmitter and the receiver.
The person position detecting device according to claim 1 or 2. The operating state of at least one of the transmitter and the receiver is changed according to the presence of a person and the detection state of the presence position of the person by the detection means.
The person position detecting device according to any one of claims 1 to 3. When the detection means detects the presence of a person and the presence position of the person, the communication frequency of the transmitter arranged around the presence position of the person is increased, or around the presence position of the person. Does at least one of the less frequent communications of said transmitters that are not located.
The person position detecting device according to any one of claims 1 to 4. A human position detector connected to an air conditioner,
A control means for controlling the air conditioner based on the result detected by the detection means is provided.
The person position detecting device according to any one of claims 1 to 5. A transmitter that emits radio waves and
A receiver that receives radio waves emitted by the transmitter and propagated by multipath propagation, and
The person position detecting device according to any one of claims 1 to 6.
A person position detection system equipped with. The reception signal strength information acquisition process of acquiring the reception signal strength of the radio wave emitted by the transmitter and received by the receiver in a multipath environment as the reception signal strength information, and
An arrangement information acquisition step of acquiring the position where the transmitter and the receiver are arranged as arrangement information, and
A feature amount calculation process for calculating a feature amount from the acquired received signal strength information, and
The feature amount in the radio wave propagating in the multi-pass environment is the transmission of the presence of a person in the space to be detected and the position of the person when the person is present in the space to be detected. Based on the fact that there is a correspondence relationship depending on the arrangement position of the machine, the arrangement position of the receiver, and the existence position of the person, by applying the correspondence relationship to the arrangement information, it is based on the arrangement information and the feature amount. Detection process to detect
Person position detection method including. On the computer
The reception signal strength information acquisition process of acquiring the reception signal strength of the radio wave emitted by the transmitter and received by the receiver in a multipath environment as the reception signal strength information, and
An arrangement information acquisition step of acquiring the position where the transmitter and the receiver are arranged as arrangement information, and
A feature amount calculation process for calculating a feature amount from the acquired received signal strength information, and
The feature amount in the radio wave propagating in the multi-pass environment is the transmission of the presence of a person in the space to be detected and the position of the person when the person is present in the space to be detected. Based on the fact that there is a correspondence relationship depending on the arrangement position of the machine, the arrangement position of the receiver, and the existence position of the person, by applying the correspondence relationship to the arrangement information, it is based on the arrangement information and the feature amount. Detection process to detect
A program that executes.

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