Information Processing Apparatus, Biological Detection System, and Information Processing Method

Abstract

The information processing apparatuses (100, 200) include an information acquisition unit (110) that acquires first distance information regarding the distance from the first antenna (1c) to the living body and second distance information regarding the distance from the second antenna (1c) to the living body, which are obtained by receiving, by the first antenna and the second antenna, reflected waves of electromagnetic waves transmitted from the first antenna and the second antenna, which are arranged at different positions, by the living body (S1); and an estimation unit (120, 220) that reproduces a synthetic aperture image of the observation space based on the first distance information acquired by the information acquisition unit, the second distance information acquired by the information acquisition unit, and the position information of each antenna, and estimates the position of the living body based on the synthetic aperture image.

Description

Technical Field

[0001] The present disclosure relates to an information processing apparatus, a biological detection system, and an information processing method.

Background Art

[0002] Conventionally, a system has been disclosed that detects a moving object such as a human being using a plurality of radar detectors incorporated in a lighting unit of a street lamp post (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, when detecting the position of a living body such as a human being using a single radar device or the like, it is conceivable that sufficient detection accuracy cannot be obtained depending on the positional relationship between the living body and the radar, the size of the living body, the type of clothing, etc., and an improvement in the detection accuracy when detecting the position of the living body is required.

[0005] The present disclosure solves the above problems, and an object thereof is to provide an information processing apparatus, a biological detection system, and an information processing method capable of improving the detection accuracy when detecting the position of a living body as compared with the prior art.

Means for Solving the Problems

[0006] The information processing apparatus according to the present disclosure includes first distance information regarding the distance from the first antenna to the living body and second distance information regarding the distance from the second antenna to the living body, which are obtained by receiving, by the first antenna and the second antenna, reflected waves of electromagnetic waves transmitted from the first antenna and the second antenna arranged at different positions by the living body. byAn information acquisition unit that acquires information, an estimation unit that estimates the position of a living body based on the first distance information acquired by the information acquisition unit and the second distance information acquired by the information acquisition unit a lighting control unit that controls a light emission mode of a lighting device corresponding to the position of a living body among a plurality of lighting devices based on the position of the living body estimated by an estimation unit; comprising and, based on a temporal change in the position of the living body estimated by the estimation unit, the lighting control unit controls the light emission mode of the lighting device corresponding to the position of the living body such that the brightness of the lighting device located in front of the moving direction of the living body among the plurality of lighting devices is greater than the brightness of the lighting device located behind the moving direction of the living body among the plurality of lighting devices characterized by

Advantages of the Invention

[0007] According to the present disclosure, since the position of a living body is estimated based on the distances between a plurality of antennas and the living body obtained from the reflected waves of electromagnetic waves transmitted from the plurality of antennas having different relative positional relationships with respect to the living body, the detection accuracy when detecting the position of the living body can be improved.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Modes for Carrying Out the Invention

[0009] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. Embodiment 1. First, with reference to FIGS. 1 and 2, the configuration of the biological detection system 1 according to Embodiment 1 will be described. FIG. 1 is a schematic diagram showing the configuration of the biological detection system 1 according to Embodiment 1, and FIG. 2 is a block diagram showing the configuration of the biological detection system 1 according to Embodiment 1. The biological detection system 1 according to Embodiment 1 includes lighting units 11, 12, ···, 1N as a plurality of lighting units, an information processing device 100, and a database DB1. Power is supplied to the lighting units 11, 12, ···, 1N (N is a natural number of 2 or more) and the information processing device 100 via a power line PL1. The biological detection system 1 is a system for detecting a living body existing around the biological detection system 1. The living body detected by the biological detection system 1 may be an animal or other living body as long as it is a moving living body. Hereinafter, the case where the living body is a human will be described as an example for the biological detection system 1. In Embodiment 1, the lighting unit 11 constitutes a first lighting unit, and the lighting unit 12 constitutes a second lighting unit.

[0010] In addition, the biological detection system 1 only needs to include two or more lighting units. For example, the biological detection system may include only two lighting units, or may include three or more lighting units. When the biological detection system includes three or more lighting units, these plurality of lighting units may be arranged linearly with a distance from each other, may be arranged in a planar manner with a distance from each other, or may be arranged three-dimensionally with a distance from each other. In other words, when the biological detection system includes a first lighting unit, a second lighting unit, and a third lighting unit, these first lighting unit, second lighting unit, and third lighting unit may be arranged linearly with a distance in a predetermined direction, or the first lighting unit and the second lighting unit may be arranged with a distance in a first direction from each other, and the first lighting unit and the third lighting unit may be arranged in a planar manner with a distance in a second direction different from the first direction from each other.

[0011] The lighting units 11, 12, ···, 1N each have a lighting device 1a, a radar device 1b, an antenna 1c, a synchronization unit 1d, a signal processing unit 1e, and a signal output unit 1f. The lighting units 11, 12, ···, 1N are arranged at a distance from each other. For example, the lighting devices 1a are arranged at different positions on the ceiling C1 of the living room R1 such as a residence, a store, or an office. Also, for example, in the lighting units 11, 12, ···, 1N, the lighting device 1a, the radar device 1b, the antenna 1c, the synchronization unit 1d, the signal processing unit 1e, and the signal output unit 1f are integrally configured to be detachable with respect to the ceiling, the floor surface, the wall surface, etc. Further, for example, the lighting units 11, 12, ···, 1N have a common power supply path for supplying power to each part of the lighting unit including the lighting device 1a and the radar device 1b. Also, the lighting units 11, 12, ···, 1N are communicably connected to each other by power line communication via the power line PL1. The content of the communication performed by the lighting units 11, 12, ···, 1N will be described later.

[0012] The lighting device 1a consumes the power supplied from the power line PL1 to emit light and irradiates light within a predetermined irradiation range. For example, the lighting device 1a has an LED (LIGHT-EMITTING DIODE), an incandescent lamp, or a fluorescent lamp, and irradiates light within a predetermined irradiation range downward from the ceiling C1.

[0013] The radar device 1b generates a transmission signal which is a signal for transmitting an electromagnetic wave from the antenna 1c. For example, the radar device 1b has a transmitter for generating an electromagnetic wave. Also, for example, the radar device 1b generates millimeter waves as the electromagnetic wave. In the first embodiment, the radar device 1b included in the lighting unit 11 constitutes the first radar device, and the radar device 1b included in the lighting unit 12 constitutes the second radar device.

[0014] Antenna 1c transmits the signal generated by the radar device 1b as an electromagnetic wave to the outside. For example, antenna 1c transmits the transmission signal generated by the radar device 1b as an electromagnetic wave toward the space inside the living room R1. Also, antenna 1c receives the reflected wave when the transmitted electromagnetic wave is reflected by an object existing in the surroundings including the person S1. In the following description, an object that reflects the electromagnetic wave transmitted from antenna 1c is also referred to as a reflecting object. Also, in Embodiment 1, the antenna 1c included in the lighting unit 11 constitutes the first antenna, and the antenna 1c included in the lighting unit 12 constitutes the second antenna.

[0015] The synchronization unit 1d synchronizes the operations of the radar devices 1b included in the lighting units 11, 12, ···, 1N. For example, the synchronization unit 1d synchronizes the operations of the radar devices 1b by communicating with other synchronization units 1d via the power line PL1, and sequentially transmits electromagnetic waves from the antennas 1c included in the lighting units 11, 12, ···, 1N by time-division processing. Thereby, the synchronization unit 1d suppresses the interference between the electromagnetic waves transmitted from the antennas 1c.

[0016] The signal processing unit 1e performs processing on the received signal, which is a signal based on the reflected wave received by the antenna 1c, and acquires distance information regarding the distance between the antenna 1c and the reflecting object. For example, the signal processing unit 1e performs coherent processing including processing such as filtering, upsampling, and downsampling on the received signal, and calculates a distance spectrum indicating the distance between the first antenna and the reflecting object as the distance information. Also, in Embodiment 1, the distance information regarding the distance between the first antenna and the reflecting object is also referred to as first distance information, and the distance information regarding the distance between the second antenna and the reflecting object is also referred to as second distance information.

[0017] The signal output unit 1f outputs the distance information between the antenna 1c and the reflecting object acquired by the signal processing unit 1e to the information processing device 100 via the power line PL1.

[0018] The database DB1 has a radar position storage unit DB1a and a time information storage unit DB1b, and is communicably connected to the information processing apparatus 100. The radar position storage unit DB1a stores radar position information which is information indicating the positions of the respective antennas 1c included in the lighting units 11, 12, ···, 1N. The time information storage unit DB1b stores time information regarding time. For example, the time information storage unit DB1b stores information indicating the current time as the time information. Also, for example, the time information storage unit DB1b acquires, via the information processing apparatus 100, the time when electromagnetic waves were transmitted from each antenna 1c and the time when each antenna 1c received a reflected wave as the time information, and stores these time information. Note that the database DB1 may be integrally configured with the information processing apparatus 100, or may be configured as a part of the functions of the information processing apparatus 100.

[0019] The information processing apparatus 100 includes a signal acquisition unit 110 as an information acquisition unit, an estimation unit 120, and a lighting control unit 140, and is communicably connected to the lighting units 11, 12, ···, 1N by power line communication via the power line PL1. The signal acquisition unit 110 acquires information from the respective signal output units 1f of the lighting units 11, 12, ···, 1N.

[0020] The estimation unit 120 estimates the position of the person S1 which is the detection target based on the distance information acquired by the signal acquisition unit 110. For example, the estimation unit 120 includes a synthetic aperture processing unit 122 which images the space inside the living room R1 by synthetic aperture processing based on the distance spectrum indicating the distances from the respective antennas 1c to the reflection object acquired by the signal acquisition unit 110 and the position information of the respective antennas 1c acquired from the radar position storage unit DB1a, and a position estimation unit 121 which estimates the positions of the respective persons S1 which are the detection targets based on the image (synthetic aperture image) obtained by the synthetic aperture processing.

[0021] For example, the synthetic aperture processing unit 122 images the space inside the living room R1 by synthetic aperture processing based on the radar position information of each antenna 1c and the distance information output from the lighting units 11, 12, ···, 1N. Also, the position estimation unit 121 estimates that a person S1 is included in the space inside the living room R1 and the position and posture of the person S1 at a specific time based on the reproduced synthetic aperture image. For example, the position estimation unit 121 estimates the position and posture of the person S1 using a learned model that outputs an image of the shape of the reflecting object by inputting the reproduced synthetic aperture image.

[0022] The lighting control unit 140 controls the light emission mode of each lighting device 1a based on the estimation result by the position estimation unit 121. For example, the lighting control unit 140 controls the light emission mode such as the luminous intensity, emission color, lighting state, and extinguishing state of each lighting device 1a based on the estimation result by the position estimation unit 121. The control content of the lighting device 1a by the lighting control unit 140 will be described later.

[0023] Configured in this way, the biological detection system 1 functions as a synthetic aperture radar for detecting a living body by the plurality of antennas 1c of the lighting units 11, 12, ···, 1N functioning as element antennas.

[0024] Next, with reference to FIGS. 3 and 4, the hardware configuration of the information processing apparatus 100 will be described. FIG. 3 is a block diagram showing an example of the hardware configuration of the information processing apparatus 100 according to Embodiment 1, and FIG. 4 is a block diagram showing an example of a hardware configuration different from that of FIG. 3 of the information processing apparatus 100 according to Embodiment 1. For example, as shown in FIG. 3, the information processing apparatus 100 includes a processor 100a, a memory 100b, and an I / O port 100c, and is configured such that the processor 100a reads and executes a program stored in the memory 100b. The memory 100b is constituted by, for example, a non-volatile or volatile semiconductor memory such as a RAM, a ROM, a flash memory, an EPROM, or an EEPROM, or a combination thereof. Further, the memory 100b may be a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, a DVD, or the like. Furthermore, the memory 100b may be an HDD or an SSD.

[0025] Also, for example, as shown in FIG. 4, the information processing apparatus 100 includes a processing circuit 100d, which is dedicated hardware, and an I / O port 100c. The processing circuit 100d is constituted by, for example, a single circuit, a composite circuit, a programmed processor, a parallel-programmed processor, a system LSI (Large-Scale Integration), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a combination thereof. Each function of the information processing apparatus 100 is realized by the processor 100a or the processing circuit 100d, which is dedicated hardware, executing a program that is software, firmware, or a combination of software and firmware.

[0026] Next, with reference to FIG. 5, the details of the process performed by the information processing apparatus 100 according to Embodiment 1 to detect the position of the living body will be described. FIG. 5 is a flowchart showing the process performed by the information processing apparatus 100 according to Embodiment 1. As shown in FIG. 5, when starting the process, the information processing apparatus 100 acquires the radar position information of each antenna 1c from the database DB1 (step ST1).

[0027] When the process of step ST1 is performed, the information processing apparatus 100 acquires time information from the database DB1 (step ST2). When the process of step ST2 is performed, the information processing apparatus 100 acquires distance information from the lighting units 11, 12, ···, 1N by the signal acquisition unit 110 (step ST3). When the process of step ST3 is performed, the information processing apparatus 100 determines whether or not the person S1 is included in the reflection object in the space inside the living room R1 by reproducing the synthetic aperture image of the space inside the living room R1 by the estimation unit 120. If it is determined that the person S1 is included in the reflection object, the position of the person S1 at a specific time is estimated (step ST4).

[0028] When the process of step ST4 is performed, the information processing apparatus 100 controls the light emission mode of the lighting device 1a of the lighting units 11, 12, ···, 1N based on the estimated position of the person S1 (step ST5). In other words, the information processing apparatus 100 controls the light emission mode of the lighting device 1a corresponding to the position of the person S1 among the plurality of lighting devices 1a by the lighting control unit 140. For example, the lighting control unit switches the brightness of the lighting device 1a corresponding to the position of the person S1 among the plurality of lighting devices 1a between a first state and a second state having a different brightness from the first state, so as to control the light emission mode of the lighting device 1a according to the position of the living body. Also, for example, the lighting control unit switches the lighting device 1a corresponding to the position of the person S1 among the plurality of lighting devices 1a between a lit state, a blinking state, and a turned-off state, so as to control the light emission mode of the lighting device 1a according to the position of the living body.

[0029] For example, the information processing apparatus 100 controls the light emission modes of the plurality of lighting devices 1a so as to turn on the lighting device 1a closest to the position of a specific person S1 among the plurality of lighting devices 1a, and turn off some or all of the lighting devices 1a including the lighting device 1a farthest from the position of the specific person S1 among the other lighting devices 1a.

[0030] Also, for example, when it is estimated by the estimation unit 120 that a plurality of persons S1 are included in the reflection object, the information processing apparatus 100 turns on the lighting device 1a closest to the position of each person S1 among the plurality of lighting devices 1a, and turns off the lighting devices 1a that are separated from any of the persons S1 by a preset distance or more among the other lighting devices 1a, so as to control the light emission modes of the plurality of lighting devices 1a.

[0031] Also, for example, the information processing apparatus 100 controls the light emission modes of the plurality of lighting devices 1a so as to turn on the lighting device 1a with the irradiation range closest to the position of a specific person S1 among the plurality of lighting devices 1a, and turn off some or all of the lighting devices 1a including the lighting device 1a with the irradiation range farthest from the position of the specific person S1 among the other lighting devices 1a.

[0032] Also, for example, when it is estimated by the estimation unit 120 that a plurality of persons S1 are included in the reflection object, the information processing apparatus 100 turns on the lighting device 1a with the irradiation range closest to the position of each person S1 among the plurality of lighting devices 1a, and turns off the lighting devices 1a that are separated from any of the persons S1 by a preset distance or more among the other lighting devices 1a, so as to control the light emission modes of the plurality of lighting devices 1a.

[0033] Note that the information processing apparatus 100 may be configured to control the light emission modes of the plurality of lighting devices 1a so as to turn off the lighting devices 1a that are separated from each other by more than a preset number of lighting devices 1a instead of turning off the lighting devices 1a that are separated from each other by a preset distance or more.

[0034] Further, for example, the information processing apparatus 100 estimates the moving direction of each person S1 based on the temporal change in the position of each person S1 by the lighting control unit 140, and based on the position and moving direction of a specific person S1, the brightness of the lighting device 1a located in front of the moving direction of the specific person S1 among the plurality of lighting devices 1a is greater than the brightness of any of the lighting devices 1a located behind the moving direction of the specific person S1 among the plurality of lighting devices 1a, and controls the light emission mode of the plurality of lighting devices 1a.

[0035] Specifically, the information processing apparatus 100 estimates the moving direction of each person S1 based on the temporal change in the position of each person S1 by the lighting control unit 140, and based on the position and moving direction of a specific person S1, the brightness of the lighting device 1a located in front of the moving direction of the specific person S1 and within a preset distance from the specific person S1 among the plurality of lighting devices 1a is greater than the brightness of the lighting device 1a located behind the moving direction of the specific person S1 and at a position separated by a preset distance or more among the plurality of lighting devices 1a, and controls the light emission mode of the plurality of lighting devices 1a.

[0036] Further, for example, the information processing apparatus 100 estimates the moving direction of each person S1 based on the temporal change in the position of each person S1 by the lighting control unit 140, and based on the position and moving direction of a specific person S1, turns on the lighting device 1a located in front of the moving direction of the specific person S1 among the plurality of lighting devices 1a, and turns off any of the lighting devices 1a located behind the moving direction of the specific person S1 among the plurality of lighting devices 1a, and controls the light emission mode of the plurality of lighting devices 1a.

[0037] Further, for example, the information processing apparatus 100 estimates the moving direction of each person S1 based on the temporal change in the position of each person S1 by the lighting control unit 140, and based on the position and moving direction of a specific person S1, among the plurality of lighting devices 1a, the lighting device 1a closest to the position of the specific person S1 and the lighting device 1a located in front of the moving direction of the specific person S1 are made to have a brightness greater than that of any of the lighting devices 1a located behind the moving direction of the specific person S1 among the plurality of lighting devices 1a, thereby controlling the brightness of the plurality of lighting devices 1a.

[0038] Further, for example, the information processing apparatus 100 estimates the moving direction and moving speed of each person S1 based on the temporal change in the position of each person S1 by the lighting control unit 140, and based on the position, moving direction, and moving speed of a specific person S1, among the plurality of lighting devices 1a, the lighting device 1a located in front of the moving direction of the specific person S1 and within a preset distance from the specific person S1 within a preset time is made to have a brightness greater than that of the lighting device 1a located behind the moving direction of the specific person S1 among the plurality of lighting devices 1a and after a preset time has elapsed since the distance from the specific person S1 has become greater than the preset distance, thereby controlling the light emission mode of the plurality of lighting devices 1a.

[0039] Further, for example, the information processing apparatus 100 estimates the moving direction of each person S1 based on the temporal change in the position of each person S1 by the lighting control unit 140, and based on the position and moving direction of a specific person S1, among the plurality of lighting devices 1a, the lighting device 1a with the irradiation range closest to the position of the specific person S1 and the lighting device 1a with the irradiation range located in front of the moving direction of the specific person S1 are made to have a brightness greater than that of any of the lighting devices 1a with the irradiation range located behind the moving direction of the specific person S1 among the plurality of lighting devices 1a, thereby controlling the brightness of the plurality of lighting devices 1a.

[0040] Further, for example, the information processing apparatus 100 estimates the moving direction and moving speed of each person S1 based on the time change of the position of each person S1 by the lighting control unit 140, and based on the position, moving direction, and moving speed of a specific person S1, among the plurality of lighting devices 1a, the brightness of the lighting device 1a that is located in front of the moving direction of the specific person S1 and that the specific person S1 will reach within a preset time in the irradiation range is greater than the brightness of the lighting device 1a that is located behind the moving direction of the specific person S1 among the plurality of lighting devices 1a and that has elapsed a preset time after the specific person S1 has left the irradiation range, and controls the light emission modes of the plurality of lighting devices 1a.

[0041] Note that each control of the light emission mode of the lighting device 1a performed by the above-described information processing apparatus 100 can be freely combined and any control can be omitted.

[0042] When the process of step ST5 is performed, the information processing apparatus 100 returns the process to step ST2 and repeats the processes of steps ST2 to ST5.

[0043] As described above, the biological detection system 1 according to the first embodiment includes an information processing apparatus including an information acquisition unit that acquires first distance information regarding the distance from the first antenna to the living body and second distance information regarding the distance from the second antenna to the living body, which are obtained by receiving, by the first antenna and the second antenna, reflected waves of electromagnetic waves transmitted from the first antenna and the second antenna arranged at different positions by the living body, and an estimation unit that estimates the position of the living body based on the first distance information acquired by the information acquisition unit and the second distance information acquired by the information acquisition unit.

[0044] Thereby, the biological detection system 1 estimates the position of the living body from a synthetic aperture image based on the distances between the plurality of antennas and the living body obtained from the reflected waves of the electromagnetic waves transmitted from the plurality of antennas by the living body, so that the detection accuracy when detecting the position of the living body can be improved as compared with the case of estimating the position of the living body based on the distance between a single antenna and the living body.

[0045] Further, the information processing apparatus 100 according to Embodiment 1 includes an illumination control unit that controls the light emission mode of an illumination device corresponding to the position of the living body among a plurality of illumination devices including the first illumination device and the second illumination device based on the position of the living body estimated by the estimation unit. Thereby, for example, the living body detection system 1 according to Embodiment 1 can reduce the brightness of an illumination device with relatively low importance according to the position of the living body, and can suppress the power consumption by the illumination device.

[0046] Note that, in the living body detection system 1 according to Embodiment 1, the illumination units 11, 12, ···, 1N and the information processing apparatus 100 are communicably connected to each other by power line communication via the power line PL1, and the signal acquisition unit 110 acquires distance information from each illumination unit via the power line communication. Thereby, the living body detection system 1 can easily relocate, add, and delete the illumination units 11, 12, ···, 1N, and can reduce the work load of relocating, adding, or deleting the illumination units 11, 12, ···, 1N.

[0047] Note that, in the living body detection system 1 according to Embodiment 1, the illumination units 11, 12, ···, 1N and the information processing apparatus 100 are communicably connected to each other by power line communication via the power line PL1, but it is not limited thereto. For example, in the living body detection system, the plurality of illumination units and between the plurality of illumination units and the information processing apparatus may be communicably connected to each other by wireless communication. For example, when the living body detection system is configured in this way, the communication between the plurality of illumination units and between the plurality of illumination units and the information processing apparatus is communicably connected to each other by OFDM radar communication, and the synchronization signal between the plurality of illumination units and the past (previous) reception signal are encoded and transmitted to the OFDM radar signal transmitted from the antenna for surrounding monitoring, it is possible to shorten the monitoring period compared to transmitting signals such as the synchronization signal and the OFDM radar signal at different times.

[0048] Embodiment 2. Next, with reference to FIGS. 6 and 7, the biological detection system 2 according to Embodiment 2 will be described. The biological detection system 2 according to Embodiment 2 is different from the biological detection system 1 according to Embodiment 1 in that the information processing device estimates the vital information of the living body in addition to the position of the living body, and controls the lighting device 1a based on the estimated position of the living body and the vital information of the living body. However, other configurations are the same. For configurations similar to those in Embodiment 1, the same reference numerals will be used and the description will be omitted.

[0049] FIG. 6 is a block diagram showing the configuration of the biological detection system 2 according to Embodiment 2. The biological detection system 1 according to Embodiment 1 includes lighting units 11, 12, ···, 1N as a plurality of lighting units, an information processing device 200, and a database DB1. The information processing device 200 includes a signal acquisition unit 110, an estimation unit 220, a health state determination unit 130, and a lighting control unit 140, and is communicably connected to the lighting units 11, 12, ···, 1N by power line communication via a power line PL1.

[0050] The estimation unit 220 includes a position estimation unit 221, a vital information estimation unit 222, and a synthetic aperture processing unit 223. The vital information estimation unit 222 estimates the vital information of the person S1 included in the reflecting object based on the estimation result by the position estimation unit 121. The vital information estimation unit 222 estimates the vital information of the person S1 based on the estimation result of the temporal change of the shape of a specific person S1 by the position estimation unit 121. In other words, the vital information estimation unit 222 estimates the vital information of the person S1 included in the reflecting object based on the temporal change of the distance information acquired by the signal acquisition unit 110. For example, the vital information estimation unit 222 estimates the vital information such as the pulse, heart rate, respiratory rate, and blood pressure value of the specific person S1 based on the temporal change of the shape of the specific person S1. For example, the vital information estimation unit 222 estimates the vital information of each person S1 based on the micro-Doppler information caused by the person S1 included in the reflecting object due to the input of the radar position information and the distance information. The process performed by the synthetic aperture processing unit 223 is the same as the process performed by the synthetic aperture processing unit 122 according to the first embodiment, and thus the description thereof is omitted.

[0051] The health state determination unit 130 estimates the health state of each person S1 based on the estimation result by the vital information estimation unit 222. For example, the health state determination unit 130 determines, as the health state of each person S1, whether it is a sleep state, whether it is a support required state including medical treatment, etc., based on the pulse, heart rate, respiratory rate, blood pressure value, etc. of each person S1 estimated by the vital information estimation unit 222. For example, the health state determination unit 130 determines the health state of each person S1 based on whether the vital information of each person S1 estimated by the vital information estimation unit 222 is within a preset threshold. Note that the information processing apparatus 200 may be configured to estimate the health state of each person S1 by a learned model that outputs the health state of each person S1 based on the input of the radar position information and the distance information.

[0052] The lighting control unit 140 according to Embodiment 2 controls the light emission mode of each lighting device 1a based on the estimation result by the position estimation unit 221 and the determination result by the health state determination unit 130. For example, the lighting control unit 140 controls the light emission mode such as the luminous intensity, light emission color, switching of lighting and extinguishing, irradiation range, etc. of each lighting device 1a based on the estimation result by the position estimation unit 221 and the determination result by the health state determination unit 130. Note that since the health state determination unit 130 determines the health state of the person S1 based on the vital information of the person S1 estimated by the vital information estimation unit 222, it can be said that the lighting control unit 140 controls the light emission mode of each lighting device 1a based on the estimation result by the position estimation unit 221 and the estimation result by the vital information estimation unit 222. The control content of the lighting device 1a by the lighting control unit 140 according to Embodiment 2 will be described later.

[0053] The hardware configuration of the information processing apparatus 200 according to Embodiment 2 is the same as that of the information processing apparatus 100 according to Embodiment 1, and thus the description thereof is omitted.

[0054] FIG. 7 is a flowchart showing the processing performed by the information processing apparatus 200 according to Embodiment 2. In the processing performed by the information processing apparatus 200, the processing from step ST1 to step ST4 is the same as the processing performed by the information processing apparatus 100 according to Embodiment 1, and thus the description thereof is omitted.

[0055] When the processing of step ST4 is performed, the information processing apparatus 200 estimates the vital information of the person S1 included in the reflection object by the vital information estimation unit 222 (step ST6). When the processing of step ST6 is performed, the information processing apparatus 200 determines the health state of the person S1 included in the reflection object by the health state determination unit 130 (step ST7).

[0056] When the process of step ST7 is performed, the information processing apparatus 200 controls the light emission modes of the lighting devices 1a of the lighting units 11, 12, ···, 1N based on the estimated position of the person S1 and the determined health state (step ST8). In other words, the information processing apparatus 100 controls, by the lighting control unit 140, the light emission modes of the lighting devices 1a among the plurality of lighting devices 1a such that the light emission mode of the lighting device 1a corresponding to the position of the person S1 becomes the light emission mode corresponding to the health state of the person S1.

[0057] For example, when the specific person S1 is in a sleep state, the information processing apparatus 100 controls the light emission mode of the lighting device 1a such that the brightness of the lighting device 1a closest to the position of the specific person S1 among the plurality of lighting devices 1a is made darker than when the specific person S1 is in a sleep state.

[0058] Also, for example, when the specific person S1 is in a sleep state, the information processing apparatus 100 controls the light emission mode of the lighting device 1a such that the brightness of the lighting device 1a whose irradiation range is closest to the position of the specific person S1 among the plurality of lighting devices 1a is made darker than when the specific person S1 is in a sleep state. With such a configuration, the biological detection system 2 according to the second embodiment can improve the quality of sleep of the person S1 in the sleep state and suppress the power consumption by the lighting device 1a.

[0059] Further, for example, when a specific person S1 is not in a state requiring support, the information processing apparatus 100 turns on the lighting device 1a closest to the position of the specific person S1 among the plurality of lighting devices 1a, and when the specific person S1 is in a state requiring support, the information processing apparatus 100 controls the light emission mode of the lighting device 1a so as to blink the lighting device 1a closest to the position of the specific person S1 among the plurality of lighting devices 1a. Note that when the information processing apparatus 100 blinks the lighting device 1a according to the health state of the specific person S1, it may be configured to blink the lighting device 1a in a light emission color different from the state in which the lighting device 1a is turned on. For example, the information processing apparatus 100 may be configured to control the lighting device 1a so that the light emission color in the state where the lighting device 1a blinks according to the health state of the specific person S1 is red or yellow, and the light emission color in the state where the lighting device 1a is turned on is white or a warm color close to white. With this configuration, the biological detection system 2 according to the second embodiment can notify the surroundings that the specific person S1 is in a state requiring support.

[0060] Note that in the present disclosure, a free combination of each embodiment, a modification of any component of each embodiment, or an omission of any component in each embodiment is possible.

Industrial Applicability

[0061] The information processing apparatus according to the present disclosure can be used, for example, to estimate the position of a person in a room.

[0062] Hereinafter, various aspects of the present disclosure will be summarized and described as appendices.

[0063] (Appendix 1) An information acquisition unit that acquires first distance information regarding the distance from the first antenna to the living body and second distance information regarding the distance from the second antenna to the living body, which are obtained by receiving, by the first antenna and the second antenna, reflected waves of electromagnetic waves transmitted from the first antenna and the second antenna arranged at different positions by the living body; Based on the first distance information acquired by the information acquisition unit, the second distance information acquired by the information acquisition unit, and the position information of each antenna, a synthetic aperture image of the observation space is reproduced, and an estimation unit that estimates the position of the living body based on the synthetic aperture image is provided. An information processing apparatus characterized by the above. (Supplementary Note 2) Based on the position of the living body estimated by the estimation unit, a lighting control unit that controls the light emission mode of the lighting device corresponding to the position of the living body among a plurality of lighting devices is provided. The information processing apparatus according to Supplementary Note 1, characterized by the above. (Supplementary Note 3) The lighting control unit controls the light emission mode of the lighting device corresponding to the position of the living body so as to switch the brightness of the lighting device among the plurality of lighting devices whose irradiation range is closest to the position of the living body between a first state and a second state having a different brightness from the first state based on the position of the living body estimated by the estimation unit. The information processing apparatus according to Supplementary Note 1 or 2, characterized by the above. (Supplementary Note 4) The lighting control unit controls the light emission mode of the lighting device corresponding to the position of the living body such that the brightness of the lighting device located in front of the moving direction of the living body among the plurality of lighting devices is greater than the brightness of the lighting device located behind the moving direction of the living body among the plurality of lighting devices based on the temporal change of the position of the living body estimated by the estimation unit. The information processing apparatus according to any one of Supplementary Notes 1 to 3, characterized by the above. (Supplementary Note 5) The estimation unit estimates the vital information of the living body based on the changes in the first distance information and the second distance information acquired by the information acquisition unit. The information processing apparatus according to any one of Supplementary Notes 1 to 4, characterized by the above. (Supplementary Note 6) The lighting control unit controls the light emission mode of the lighting device corresponding to the position of the living body based on the position of the living body estimated by the estimation unit and the vital information of the living body estimated by the estimation unit. The information processing apparatus according to any one of Appendices 1 to 5, characterized in that... (Appendix 7) The illumination control unit determines whether the living body is in a sleeping state based on the vital information of the living body estimated by the estimation unit. When it is determined that the living body is in a sleeping state, based on the position of the living body estimated by the estimation unit, the brightness of the illumination device among the plurality of illumination devices with the irradiation range closest to the position of the living body is made smaller than when it is determined that the living body is not in a sleeping state, and the light emission mode of the illumination device corresponding to the position of the living body is controlled. The information processing apparatus according to any one of Appendices 1 to 6, characterized in that... (Appendix 8) The illumination control unit controls the light emission mode of the illumination device corresponding to the position of the living body to switch between a lighting state and a blinking state based on the position of the living body estimated by the estimation unit and the vital information of the living body estimated by the estimation unit. The information processing apparatus according to any one of Appendices 1 to 7, characterized in that... (Appendix 9) The information acquisition unit acquires the first distance information and the second distance information via power line communication. The information processing apparatus according to any one of Appendices 1 to 8, characterized in that... (Appendix 10) The information acquisition unit acquires the first distance information and the second distance information via wireless communication. The information processing apparatus according to any one of Appendices 1 to 9, characterized in that... (Appendix 11) The plurality of illumination devices includes a first illumination device and a second illumination device. The information processing apparatus according to any one of Appendices 1 to 10. A first illumination unit having the first illumination device, the first antenna, and a first radar device that generates a signal for transmitting an electromagnetic wave from the first antenna. A second lighting unit having the second lighting device, the second antenna, and a second radar device that generates a signal for transmitting electromagnetic waves from the second antenna. A biological detection system characterized by the above. (Appendix 12) The first radar device and the first lighting device are supplied with power via a common power supply path of the first lighting unit. The biological detection system according to Appendix 11, characterized by the above. (Appendix 13) An information processing method performed by a device including an information acquisition unit and an estimation unit, The information acquisition unit acquires first distance information regarding the distance from the first antenna to the living body and second distance information regarding the distance from the second antenna to the living body, which are obtained by receiving reflected waves of electromagnetic waves transmitted from the first antenna and the second antenna arranged at different positions by the first antenna and the second antenna; The estimation unit regenerates a synthetic aperture image of the observation space based on the first distance information acquired by the information acquisition unit, the second distance information acquired by the information acquisition unit, and the position information of each antenna, and estimates the position of the living body based on the synthetic aperture image. An information processing method characterized by the above.

Explanation of Signs

[0064] 1 Biosensing system, 1a Lighting device (first lighting device, second lighting device), 1b Radar device, 1c Antenna (first antenna, second antenna), 1d Synchronization unit, 1e Signal processing unit, 1f Signal output unit (information output unit), 2 Biosensing system, 11 Lighting unit (first lighting unit), 12 Lighting unit (second lighting unit), 1N Lighting unit, 100 Information processing device, 110 Signal acquisition unit (information acquisition unit), 120 Estimation unit, 121 Position estimation unit, 122 Synthetic aperture processing unit, 130 Health state determination unit, 140 Lighting control unit, 200 Information processing device, 220 Estimation unit, 221 Position estimation unit, 222 Vital information estimation unit, 223 Synthetic aperture processing unit, C1 Ceiling, DB1 Database, DB1a Radar position storage unit, DB1b Time information storage unit, PL1 Power line, R1 Living room, S1 Person.

Claims

1. An information acquisition unit that acquires first distance information regarding the distance from the first antenna to the living body and second distance information regarding the distance from the second antenna to the living body, which are obtained by receiving, by the first antenna and the second antenna, reflected waves of electromagnetic waves transmitted from the first antenna and the second antenna arranged at different positions from each other by the living body; An estimation unit that reproduces a synthetic aperture image of the observation space based on the first distance information acquired by the information acquisition unit, the second distance information acquired by the information acquisition unit, and the position information of each antenna, and estimates the position of the living body based on the synthetic aperture image; A lighting control unit that controls the light emission mode of a lighting device corresponding to the position of the living body among a plurality of lighting devices based on the position of the living body estimated by the estimation unit; The lighting control unit controls the light emission mode of the lighting device corresponding to the position of the living body such that the brightness of the lighting device located in front of the moving direction of the living body among the plurality of lighting devices is greater than the brightness of the lighting device located behind the moving direction of the living body among the plurality of lighting devices based on the temporal change of the position of the living body estimated by the estimation unit. An information processing apparatus characterized by the above.

2. An information acquisition unit that acquires first distance information regarding the distance from the first antenna to the living body and second distance information regarding the distance from the second antenna to the living body, which are obtained by receiving, by the first antenna and the second antenna, reflected waves of electromagnetic waves transmitted from the first antenna and the second antenna arranged at different positions from each other by the living body; An estimation unit that reproduces a synthetic aperture image of the observation space based on the first distance information acquired by the information acquisition unit, the second distance information acquired by the information acquisition unit, and the position information of each antenna, and estimates the position of the living body based on the synthetic aperture image; A lighting control unit that controls the light emission mode of a lighting device corresponding to the position of the living body among a plurality of lighting devices based on the position of the living body estimated by the estimation unit; The estimation unit estimates the vital information of the living body based on the changes in the first distance information and the second distance information acquired by the information acquisition unit. The illumination control unit controls the light emission mode of the illumination device according to the position of the living body, based on the position of the living body estimated by the estimation unit and the vital information of the living body estimated by the estimation unit, so as to switch between a lighting state and a blinking state. An information processing apparatus characterized by the above.

3. Based on the position of the living body estimated by the estimation unit, the illumination control unit controls the light emission mode of the illumination device according to the position of the living body, so as to switch the brightness of the illumination device with the closest irradiation range to the position of the living body among the plurality of illumination devices between a first state and a second state with a different brightness from the first state. The information processing apparatus according to claim 1 or 2, characterized by the above.

4. The illumination control unit determines whether the living body is in a sleeping state based on the vital information of the living body estimated by the estimation unit. When it is determined that the living body is in a sleeping state, based on the position of the living body estimated by the estimation unit, the brightness of the illumination device with the closest irradiation range to the position of the living body among the plurality of illumination devices is made smaller than when it is determined that the living body is not in a sleeping state, so as to control the light emission mode of the illumination device according to the position of the living body. The information processing apparatus according to claim 2, characterized by the above.

5. The information acquisition unit acquires the first distance information and the second distance information via power line communication. The information processing apparatus according to claim 1 or 2, characterized by the above.

6. The information acquisition unit acquires the first distance information and the second distance information via wireless communication. The information processing apparatus according to claim 1 or 2, characterized by the above.

7. The plurality of illumination devices include a first illumination device and a second illumination device. The information processing apparatus according to claim 1 or 2. A first illumination unit having the first illumination device, the first antenna, and a first radar device that generates a signal for transmitting electromagnetic waves from the first antenna. A second illumination unit having the second illumination device, the second antenna, and a second radar device that generates a signal for transmitting electromagnetic waves from the second antenna. A living body detection system characterized by the above.

8. Power is supplied to the first radar device and the first illumination device via a common power supply path of the first illumination unit. The living body detection system according to claim 7, characterized by the above.

9. An information processing method performed by a device including an information acquisition unit, an estimation unit, and an illumination control unit, comprising: a step in which the information acquisition unit acquires first distance information regarding the distance from the first antenna to the living body and second distance information regarding the distance from the second antenna to the living body, which are obtained by receiving, with the first antenna and the second antenna, reflected waves of electromagnetic waves transmitted from the first antenna and the second antenna arranged at different positions by the living body; a step in which the estimation unit reproduces a synthetic aperture image of the observation space based on the first distance information acquired by the information acquisition unit, the second distance information acquired by the information acquisition unit, and the position information of each antenna, and estimates the position of the living body based on the synthetic aperture image; a step in which the illumination control unit controls a light emission mode of an illumination device corresponding to the position of the living body among a plurality of illumination devices based on the position of the living body estimated by the estimation unit; and the illumination control unit controls the light emission mode of the illumination device corresponding to the position of the living body such that the brightness of the illumination device located in front of the moving direction of the living body among the plurality of illumination devices is greater than the brightness of the illumination device located behind the moving direction of the living body among the plurality of illumination devices based on a temporal change in the position of the living body estimated by the estimation unit. An information processing method characterized by the above.

10. An information processing method performed by a device including an information acquisition unit, an estimation unit, and an illumination control unit, comprising: a step in which the information acquisition unit acquires first distance information regarding the distance from the first antenna to the living body and second distance information regarding the distance from the second antenna to the living body, which are obtained by receiving, with the first antenna and the second antenna, reflected waves of electromagnetic waves transmitted from the first antenna and the second antenna arranged at different positions by the living body; a step in which the estimation unit reproduces a synthetic aperture image of the observation space based on the first distance information acquired by the information acquisition unit, the second distance information acquired by the information acquisition unit, and the position information of each antenna, and estimates the position of the living body based on the synthetic aperture image; a step in which the illumination control unit controls a light emission mode of an illumination device corresponding to the position of the living body among a plurality of illumination devices based on the position of the living body estimated by the estimation unit; and The estimation unit estimates the vital information of the living body based on changes in the first distance information and the second distance information acquired by the information acquisition unit. The illumination control unit controls to switch the light emission mode of the illumination device according to the position of the living body between a lighting state and a blinking state based on the position of the living body estimated by the estimation unit and the vital information of the living body estimated by the estimation unit. An information processing method characterized by the above.

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