WO2023136112A1 - Dispositif de calcul et programme de calcul - Google Patents

Dispositif de calcul et programme de calcul Download PDF

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Publication number
WO2023136112A1
WO2023136112A1 PCT/JP2022/047897 JP2022047897W WO2023136112A1 WO 2023136112 A1 WO2023136112 A1 WO 2023136112A1 JP 2022047897 W JP2022047897 W JP 2022047897W WO 2023136112 A1 WO2023136112 A1 WO 2023136112A1
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WIPO (PCT)
Prior art keywords
person
computing device
antennas
antenna
mode
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PCT/JP2022/047897
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English (en)
Japanese (ja)
Inventor
雄彦 飯塚
敬 芳賀
伸幸 能澤
純 牧野
和也 木村
亮太 藤原
将人 門田
望 木次谷
祐馬 田邊
健太 鈴木
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株式会社村田製作所
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Publication of WO2023136112A1 publication Critical patent/WO2023136112A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/04—Systems determining presence of a target
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/12—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with electromagnetic waves

Definitions

  • the present invention relates to an arithmetic device and arithmetic program for detecting the position of an object, the position of a person, or the movement of a person.
  • the transmission device described in Patent Document 1 is known as an invention related to conventional arithmetic devices.
  • the transmission device described in Patent Literature 1 uses electromagnetic waves to sense the surroundings.
  • the transmitter uses electromagnetic waves to detect people or vehicles.
  • an object of the present invention is to provide a computing device and a computing program capable of sensing the surroundings with higher accuracy regardless of whether it is raining or snowing.
  • a computing device includes: A computing device used in a detection device for detecting the position of an object, the position of a person, or the movement of a person within a first region,
  • the detection device comprises a communication device located within the first region,
  • the communication device includes first to T-th transmitting antennas and first to R-th receiving antennas,
  • the first to R-th receiving antennas receive signals of first to N-th subcarriers transmitted by electromagnetic waves from the first to T-th transmitting antennas, T, R and N are integers of 1 or more
  • the computing device is an obtaining step of obtaining weather information about the weather in the first region; selecting an operation mode based on the weather information obtained in the obtaining step; setting the transmission strength of the electromagnetic waves transmitted by the first to T-th transmission antennas based on the selected operation mode; or receiving by the first to R-th reception antennas.
  • the reception sensitivity of the electromagnetic wave to Based on the signals of the first to N-th subcarriers received by the first to R-th reception antennas, the first to T-th transmission antennas and the first to the T-th reception antennas a calculating step of calculating channel state information indicating a state of a transmission path of the electromagnetic wave between the R-th receiving antenna; and a detecting step of detecting the position of the object, the position of the person, or the movement of the person in the first area based on the channel state information calculated in the calculating step.
  • a computing program comprises An arithmetic program executed in an arithmetic device used in a detection device for detecting the position of an object, the position of a person, or the movement of a person in a first region
  • the detection device comprises a communication device located within the first region
  • the communication device includes first to T-th transmitting antennas and first to R-th receiving antennas,
  • the first to R-th receiving antennas receive signals of first to N-th subcarriers transmitted by electromagnetic waves from the first to T-th transmitting antennas, T, R and N are integers of 1 or more
  • the computing program is an obtaining step of obtaining weather information about the weather in the first region; selecting an operation mode based on the weather information obtained in the obtaining step; setting the transmission strength of the electromagnetic waves transmitted by the first to T-th transmission antennas based on the selected operation mode; or receiving by the first to R-th reception antennas.
  • the reception sensitivity of the electromagnetic wave to Based on the signals of the first to N-th subcarriers received by the first to R-th reception antennas, the first to T-th transmission antennas and the first to R-th reception antennas a calculating step of calculating channel state information indicating a state of a transmission path of the electromagnetic wave between the R-th receiving antenna; and a detecting step of detecting the position of the object, the position of the person, or the movement of the person in the first area based on the channel state information calculated in the calculating step.
  • the surroundings can be sensed with higher accuracy regardless of whether it is raining or snowing.
  • FIG. 1 is a side view of a passenger car 1 according to the first embodiment.
  • FIG. 2 is a block diagram of the detection device 20 according to the first embodiment.
  • FIG. 3 is a top view of the cabin 10 of the passenger car 1 according to the first embodiment.
  • FIG. 4 is a diagram showing an example of transmission paths of electromagnetic waves between the first transmitting antenna 4t1 to the Tth transmitting antenna 4tT and the first receiving antenna 4r1 to the Rth receiving antenna 4rR according to the first embodiment.
  • FIG. 5 is a flowchart showing processing executed by the arithmetic device 5 according to the first embodiment.
  • FIG. 6 is a diagram showing an example of the amplitude and phase of channel state information hmn between the m-th transmitting antenna 4tm and the n-th receiving antenna 4rn when the person 3 in the first area operates according to the first embodiment.
  • FIG. 7 is a diagram showing an example of the amplitude and phase of channel state information hmn between the m-th transmitting antenna 4tm and the n-th receiving antenna 4rn during breathing of the person 3 in the first area according to the first embodiment.
  • FIG. 8 is a flowchart showing processing executed by the arithmetic device 5 according to the second embodiment.
  • FIG. 9 is a flowchart showing processing executed by the arithmetic device 5 according to the third embodiment.
  • FIG. 10 is a flowchart showing processing executed by the arithmetic device 5 according to the fourth embodiment.
  • FIG. 11 is a flowchart showing processing executed by the arithmetic device 5 according to the fifth embodiment.
  • FIG. 12 shows an example of the amplitude and phase of the channel state information hmn between the m-th transmitting antenna 4tm and the n-th receiving antenna 4rn during breathing of the person 3 in the first region under fine weather according to the fifth embodiment. It is a figure which shows.
  • FIG. 13 shows an example of the amplitude and phase of channel state information hmn between the m-th transmitting antenna 4tm and the n-th receiving antenna 4rn during breathing of the person 3 in the first area in rainy weather according to the fifth embodiment. It is a figure which shows.
  • FIG. 1 is a side view of a passenger car 1 according to the first embodiment.
  • FIG. 2 is a block diagram of the detection device 20 according to the first embodiment.
  • FIG. 3 is a top view of the cabin 10 of the passenger car 1 according to the first embodiment.
  • FIG. 4 is a diagram showing an example of transmission paths of electromagnetic waves between the first transmitting antenna 4t1 to the Tth transmitting antenna 4tT and the first receiving antenna 4r1 to the Rth receiving antenna 4rR according to the first embodiment.
  • FIG. 5 is a flowchart showing processing executed by the arithmetic device 5 according to the first embodiment.
  • FIG. 6 is a diagram showing an example of the amplitude and phase of channel state information hmn between the m-th transmitting antenna 4tm and the n-th receiving antenna 4rn when the person 3 in the first area operates according to the first embodiment. is.
  • the horizontal axis indicates time and the vertical axis indicates amplitude or phase.
  • FIG. 7 is a diagram showing an example of the amplitude and phase of channel state information hmn between the m-th transmitting antenna 4tm and the n-th receiving antenna 4rn during breathing of the person 3 in the first area according to the first embodiment. is.
  • the horizontal axis indicates time and the vertical axis indicates amplitude or phase.
  • FIGS. 6 and 7 is an experimental result when the person 3 is seated on the rear seat of the passenger car 1 and is breathing in fine weather.
  • the detection device 20 is a detection device that detects the position of the object 2, the position of the person 3, or the movement of the person 3 within the first area.
  • the detection device 20 is a detection device that detects the position of the object 2, the position of the person 3, or the movement of the person 3 in the cabin 10 of the passenger car 1, as shown in FIGS. Used.
  • the cabin 10 of the passenger car 1 is an example of the first area.
  • the passenger car 1 is an example of a vehicle. That is, in this embodiment, the first area is the cabin 10 of the vehicle.
  • the passenger car 1 has a window, as shown in FIG.
  • the object 2 is, for example, a smart phone.
  • the detection device 20 includes a communication device 4, as shown in FIG. Further, the calculation device 5 is used in the detection device 20 as shown in FIG.
  • the communication device 4 includes a transmitting device 41, first transmitting antenna 4t1 to T-th transmitting antenna 4tT, receiving device 42, and first receiving antenna 4r1 to R-th receiving antenna 4rR.
  • T and R are each an integer of 1 or more.
  • the communication device 4 is arranged inside the cabin 10 as shown in FIG. That is, the communication device 4 is arranged within the first area. Moreover, in this embodiment, the arithmetic device 5 is arranged in the cabin 10 as shown in FIG. That is, the arithmetic device 5 is arranged within the first region.
  • the propagation of electromagnetic waves has the property of changing when the path of the electromagnetic wave changes.
  • the path of an electromagnetic wave changes as the environment through which the electromagnetic wave travels changes. Changes in the environment include, for example, the position of the object 2 existing in the environment through which the electromagnetic wave passes, the movement of the object 2, the position of the person 3, the movement of the person 3, the movement of the object 2 accompanying the movement of the person 3, or the change in rainfall. Presence or absence of snowfall.
  • radio waves from Wi-Fi are used as an example of electromagnetic waves.
  • the transmitting device 41 and the receiving device 42 are Wi-Fi (registered trademark) access points.
  • the first transmitting antenna 4t1 to the T-th transmitting antenna 4tT are Wi-Fi (registered trademark) transmitting antennas.
  • the first receiving antenna 4r1 to the R-th receiving antenna 4rR are Wi-Fi (registered trademark) receiving antennas.
  • Wi-Fi (registered trademark) channel state information (CSI) is used as electromagnetic wave propagation information.
  • Wi-Fi (registered trademark) channel state information CSI is an example of channel state information. Details are described below.
  • the transmission device 41 generates each of the first transmission signal to the Tth transmission signal.
  • the transmission device 41 causes the first transmission antenna 4t1 to the Tth transmission antenna 4tT to transmit the first transmission signal to the Tth transmission signal, respectively.
  • Each of the first transmission signal to the Tth transmission signal includes signals of the first subcarrier to the Nth subcarrier.
  • N is an integer of 1 or more.
  • Each of the signals of the first subcarrier to the Nth subcarrier is a signal digitally modulated by the transmitting device 41 by OFDM (Orthogonal Frequency Division Multiplexing). Since the 1st to Nth subcarriers are orthogonal to each other, they do not interfere with each other.
  • OFDM Orthogonal Frequency Division Multiplexing
  • Each of the first transmission antenna 4t1 to the Tth transmission antenna 4tT transmits the first transmission signal to the Tth transmission signal by electromagnetic waves.
  • each of the first to T-th transmission signals transmitted from each of the first to T-th transmission antennas 4t1 to 4tT is an object 2 and a person 3 existing in an environment through which electromagnetic waves pass. and received by at least one of the first receiving antenna 4r1 to the R-th receiving antenna 4rR.
  • Each of the first to Rth reception signals received by the first to Rth reception antennas 4r1 to 4rR includes signals of the first to Nth subcarriers. That is, the first receiving antenna 4r1 to the Rth receiving antenna 4rR receive the signals of the first to Nth subcarriers transmitted by electromagnetic waves from the first transmitting antenna 4t1 to the Tth transmitting antenna 4tT.
  • the receiving device 42 acquires the first to R-th reception signals respectively received by the first to R-th reception antennas 4r1 to 4rR.
  • the first to T-th transmission signals are represented by complex numbers x1 to xT, respectively. That is, signals transmitted from the first transmitting antenna 4t1 to the T-th transmitting antenna 4tT are represented by x1 to xT, which are complex numbers, respectively. Also, the first to R-th received signals are represented by complex numbers y1 to yR, respectively. That is, the signals received by the first receiving antenna 4r1 to the R-th receiving antenna 4rR are represented by y1 to yR, which are complex numbers, respectively.
  • x1 to xT and y1 to yR satisfy Equations 1 to 5 below.
  • i is an integer of 1 or more and N or less.
  • m is an integer of 1 or more and R or less.
  • n is an integer of 1 or more and T or less.
  • Hi is channel state information between the first transmitting antenna 4t1 to the T-th transmitting antenna 4tT and the first receiving antenna 4r1 to the R-th receiving antenna 4rR of the i-th subcarrier.
  • hmn is channel state information between the m-th transmitting antenna 4tm and the n-th receiving antenna 4rn.
  • is the amplitude of hmn.
  • ⁇ hmn is the phase of hmn.
  • ni is the noise vector of the i-th subcarrier.
  • the computing device 5 is communicably connected to each of the transmitting device 41 and the receiving device 42 .
  • the arithmetic unit 5 is a processing circuit such as a CPU (Central Processing Unit) or a GPU (Graphics Processing Unit).
  • a storage device (not shown) stores the arithmetic program of the flow chart shown in FIG. The arithmetic device 5 reads and executes this arithmetic program.
  • This process is started when the computing device 5 acquires weather information about the weather in the first area (FIG. 5: START). Specifically, first, the computing device 5 acquires weather information about the weather in the first region ( FIG. 5 : acquisition step S11). Specifically, the computing device 5 acquires weather information about the weather in the first area from, for example, a weather sensor that detects weather information about the weather in the first area. Note that the computing device 5 may acquire weather information about the weather in the first region by the user inputting the weather information about the weather in the first region to the computing device 5 . Further, the computing device 5 may be connected to, for example, an in-vehicle LAN (Local Area Network) and acquire weather information regarding the weather in the first area from an in-vehicle electronic device connected to the in-vehicle LAN.
  • in-vehicle LAN Local Area Network
  • the computing device 5 When the computing device 5 acquires weather information indicating that it is neither raining nor snowing (Fig. 5: step S12), it selects the first mode (Fig. 5: step S13). On the other hand, when the computing device 5 acquires weather information indicating that it is raining or snowing (FIG. 5: step S12), it selects the second mode (FIG. 5: step S23). That is, the arithmetic device 5 selects an operation mode based on the weather information acquired in the acquisition step S11. Moreover, in this embodiment, the operation mode includes a first mode and a second mode.
  • the computing device 5 causes the first transmitting antenna 4t1 to the Tth transmitting antenna 4tT to transmit electromagnetic waves having the first intensity in the first mode ( FIG. 5 : step S14). More specifically, the computing device 5 causes the transmitting device 41 to generate the first to Tth transmission signals having the first intensity. Further, the transmitting device 41 causes the first transmitting antenna 4t1 to the T-th transmitting antenna 4tT to transmit the first to Tth transmitting signals having the first intensity, respectively.
  • the computing device 5 causes the first transmitting antenna 4t1 to the Tth transmitting antenna 4tT to transmit electromagnetic waves having a second intensity stronger than the first intensity in the second mode (FIG. 5: step S24). More specifically, the computing device 5 causes the transmitting device 41 to generate the first to Tth transmission signals having a second intensity stronger than the first intensity. Further, the transmitting device 41 causes the first transmitting antenna 4t1 to the T-th transmitting antenna 4tT to transmit the first to Tth transmission signals having a second strength higher than the first strength, respectively.
  • the arithmetic device 5 Based on the signals of the first to N-th subcarriers received by the first to R-th receiving antennas 4r1 to 4rR, the arithmetic device 5 generates the first to T-th transmitting antennas 4t1 to 4tT and the Channel state information H1 to HN indicating the state of the electromagnetic wave transmission path between the first receiving antenna 4r1 to the R-th receiving antenna are calculated ( FIG. 5 : calculation step S15, calculation step S25).
  • the arithmetic device 5 sends each of the first to T-th transmission signals generated by the transmission device 41 and each of the first to R-th reception signals acquired by the reception device 42 to the transmission device 41 and Obtained from each of the receiving devices 42 .
  • the computing device 5 uses Equation 1 to calculate channel state information Hi between the first transmitting antenna 4t1 to the T-th transmitting antenna 4tT and the first receiving antenna 4r1 to the R-th receiving antenna 4rR of the i-th subcarrier. .
  • the calculation device 5 performs this calculation for the first to N-th subcarriers. Therefore, the computing device 5 calculates channel state information H1 to HN between the first transmitting antenna 4t1 to Tth transmitting antenna 4tT and the first receiving antenna 4r1 to Rth receiving antenna 4rR, respectively.
  • the arithmetic device 5 calculates the channel state information H1 through the channel state information H1 through Based on HN, the position of the object 2, the position of the person 3, or the movement of the person 3 within the first area is detected (FIG. 5: detection step S16, detection step S26).
  • the movement of person 3 includes both the movement due to breathing of person 3 and the movement of person 3.
  • the movement of the person 3 may be either the movement due to breathing of the person 3 or the movement of the person 3 only. That is, the movement of the person 3 includes movement due to breathing of the person 3 .
  • the channel state information H1 to HN between the first transmitting antenna 4t1 to the Tth transmitting antenna 4tT and the first receiving antenna 4r1 to the Rth receiving antenna 4rR is the position of the object 2 in the first region, the position of the object 2 , the position of the person 3, and the movement of the person 3 change.
  • the channel state information hmn between the m-th transmitting antenna 4tm and the n-th receiving antenna 4rn when the person 3 operates in the first region is, as shown in FIG. Change.
  • the channel state information hmn between the m-th transmitting antenna 4tm and the n-th receiving antenna 4rn when the person 3 breathes in the first area is, as shown in FIG. ,Change.
  • the channel state information hmn between the m-th transmitting antenna 4tm and the n-th receiving antenna 4rn when the person 3 in the first area is in operation is the m-th transmitting antenna 4tm when the person 3 in the first area is breathing. and the n-th receiving antenna 4rn. More specifically, the amplitude of the channel state information hmn between the m-th transmitting antenna 4tm and the n-th receiving antenna 4rn during operation of the person 3 in the first region shown in FIG. is greater than the amplitude of the channel state information hmn between the m-th transmitting antenna 4tm and the n-th receiving antenna 4rn when the person 3 inside is breathing.
  • the computing device 5 calculates the channel state information hmn between the m-th transmitting antenna 4tm and the n-th receiving antenna 4rn to detect the change in the position of the person 3 in the first area or the position of the person in the first area. 3 movements can be detected.
  • the surroundings can be sensed with higher accuracy regardless of whether it is raining or snowing. More specifically, the computing device 5 acquires weather information regarding the weather in the first region. Based on the signals of the first to N-th subcarriers received by the first to R-th receiving antenna 4r1 to R-th receiving antenna 4rR, the arithmetic unit 5 connects the first to T-th transmitting antenna 4t1 to the T-th transmitting antenna 4tT and the first receiving antenna.
  • Channel state information H1 to HN indicating the state of electromagnetic wave transmission paths between 4r1 to R-th receiving antennas are calculated.
  • the path of the electromagnetic wave changes when the environment through which the electromagnetic wave passes changes.
  • the path of electromagnetic waves changes depending on the presence or absence of rainfall or snowfall. More specifically, when it rains or snows, water adheres to the windows of the passenger car 1, for example. Therefore, the state of reflection of electromagnetic waves on the windows of the passenger car 1 changes depending on whether it is raining or snowing. Therefore, the arithmetic unit 5 selects an operation mode based on the obtained weather information regarding the weather in the first region.
  • the arithmetic device 5 Based on the calculated channel state information H1 to HN between the first transmitting antenna 4t1 to T-th transmitting antenna 4tT and the first receiving antenna 4r1 to R-th receiving antenna 4rR in the selected operation mode, the arithmetic device 5 Detecting the position of the object 2, the position of the person 3 or the movement of the person 3 within the first area. As a result, the computing device 5 can detect the position of the object 2, the position of the person 3, or the movement of the person 3 in the first area by operating modes suitable for the weather. As described above, according to the computing device 5, the surroundings can be sensed with higher accuracy regardless of whether it is raining or snowing.
  • the computing device 5 it is possible to sense the surroundings with higher accuracy regardless of whether it is raining or snowing. More specifically, when the arithmetic device 5 acquires weather information indicating that it is not raining or snowing, the first mode causes the first transmitting antenna 4t1 to the T-th transmitting antenna 4tT to transmit electromagnetic waves having a first intensity. to select. On the other hand, when obtaining weather information indicating that it is raining or snowing, the computing device 5 causes the first transmitting antenna 4t1 to the T-th transmitting antenna 4tT to transmit electromagnetic waves having a second intensity higher than the first intensity. Select the second mode.
  • the signals of the first to N-th subcarriers are sufficient for the arithmetic unit 5 to detect the position of the object 2, the position of the person 3, or the movement of the person 3 in the first area. can be received by the first receiving antenna 4r1 to the R-th receiving antenna 4rR.
  • the computing device 5 can sense the surroundings with higher accuracy regardless of whether it is raining or snowing.
  • FIG. 8 is a flowchart showing processing executed by the arithmetic device 5 according to the second embodiment.
  • the detection device 20a having the arithmetic device 5 according to the second embodiment only the parts different from the detection device 20 having the arithmetic device 5 according to the first embodiment will be explained, and the rest will be omitted.
  • This embodiment differs from the detection device 20 in that the operation mode includes a third mode and a fourth mode.
  • step S12 when the computing device 5 acquires weather information indicating that it is not raining or snowing (FIG. 8: step S12), it selects the third mode (FIG. 8: step S13a). On the other hand, when the arithmetic device 5 acquires weather information indicating that it is raining or snowing (FIG. 8: step S12), it selects the fourth mode (FIG. 8: step S23a).
  • the computing device 5 causes the first receiving antenna 4r1 to the R-th receiving antenna 4rR to transmit electromagnetic waves with the first sensitivity in the third mode (FIG. 8: step S14a). More specifically, the computing device 5, for example, sets the gain of the receiving device 42 to the first gain. More precisely, the receiver 42 acquires the first to R-th reception signals respectively received by the first to R-th reception antennas 4r1 to 4rR. The receiving device 42 multiplies each of the acquired first to R-th received signals by a first amplification factor. The computing device 5 acquires from the receiving device 42 the first signal to the R-th signal, which are the result of the receiving device 42 multiplying the first to R-th received signals by the first amplification factor. The arithmetic unit 5 treats the first signal to the Rth signal as the first reception signal to the Rth reception signal.
  • the computing device 5 causes the first receiving antenna 4r1 to the R-th receiving antenna 4rR to receive electromagnetic waves with the second sensitivity stronger than the first sensitivity (FIG. 8: step S24a). More specifically, the computing device 5, for example, sets the gain of the receiving device 42 to a second gain higher than the first gain. More precisely, the receiver 42 acquires the first to R-th reception signals respectively received by the first to R-th reception antennas 4r1 to 4rR. The receiving device 42 multiplies each of the acquired first to R-th received signals by the second amplification factor.
  • the computing device 5 acquires from the receiving device 42 the first signal to the R-th signal, which are the result of the receiving device 42 multiplying the first to R-th received signals by the second amplification factor.
  • the arithmetic unit 5 treats the first signal to the Rth signal as the first reception signal to the Rth reception signal.
  • the arithmetic device 5 as described above also has the same effects as the arithmetic device 5 according to the first embodiment. More specifically, when obtaining weather information indicating that it is not raining or snowing, the computing device 5 selects the third mode in which the first receiving antenna 4r1 to the R-th receiving antenna 4rR receive electromagnetic waves with the first sensitivity. select. On the other hand, when obtaining weather information indicating that it is raining or snowing, the computing device 5 causes the first receiving antenna 4r1 to the R-th receiving antenna 4rR to receive electromagnetic waves with a second sensitivity higher than the first sensitivity. Select 4 modes.
  • the signals of the first to N-th subcarriers are sufficient for the arithmetic unit 5 to detect the position of the object 2, the position of the person 3, or the movement of the person 3 in the first area. can be received by the first receiving antenna 4r1 to the R-th receiving antenna 4rR.
  • the computing device 5 according to the second embodiment can sense the surroundings with higher accuracy regardless of whether it is raining or snowing.
  • FIG. 9 is a flowchart showing processing executed by the arithmetic device 5 according to the third embodiment.
  • the detection device 20b including the arithmetic device 5 according to the third embodiment only different parts from the detection device 20 including the arithmetic device 5 according to the first embodiment will be described, and the rest will be omitted.
  • the computing device 5 uses a machine learning model to determine the position of the object 2 and the position of the person 3 in the first region in the detection step S16b shown in FIG. 9 and the detection step S26b shown in FIG. Alternatively, it differs from the detection device 20 in that it detects the movement of the person 3 .
  • the machine learning model includes channel state information H1 to HN between the first transmitting antenna 4t1 to T-th transmitting antenna 4tT and the first receiving antenna 4r1 to R-th receiving antenna 4rR, the position of the object 2 in the first region, Teacher data indicating the relationship between the movement of the object 2, the position of the person 3, and the movement of the person 3 is used. Therefore, the machine learning model uses the channel state information H1 to HN between the first transmitting antenna 4t1 to T-th transmitting antenna 4tT and the first receiving antenna 4r1 to R-th receiving antenna 4rR and the information of the object 2 in the first region.
  • the first transmitting antenna 4t1 to T-th transmitting antenna 4tT and the first receiving antenna 4r1 to R-th receiving antenna 4rR are selected according to teacher data indicating the relationship between the position, the movement of the object 2, the position of the person 3, and the movement of the person 3.
  • the relationship between the channel state information H1 to HN between , the position of the object 2, the movement of the object 2, the position of the person 3, and the movement of the person 3 in the first region is learned in advance.
  • the computing device 5 provides channel state information indicating the state of the electromagnetic wave transmission path between the first transmitting antenna 4t1 to the T-th transmitting antenna 4tT and the first receiving antenna 4r1 to the R-th receiving antenna calculated by the computing device 5.
  • a machine learning model is used to detect the position of the object 2, the movement of the object 2, the position of the person 3, and the movement of the person 3 within the first region corresponding to H1 to HN.
  • the computing device 5 according to the third embodiment it is possible to sense the surroundings with higher accuracy. More specifically, in the detection step S16b shown in FIG. 9 and the detection step S26b shown in FIG. Alternatively, the motion of the person 3 is detected. Thereby, the detection accuracy of the position of the object 2, the position of the person 3, or the movement of the person 3 in the first area can be improved. As a result, the computing device 5 according to the third embodiment can sense the surroundings with higher accuracy.
  • FIG. 10 is a flowchart showing processing executed by the arithmetic device 5 according to the fourth embodiment.
  • the detection device 20c equipped with the arithmetic device 5 according to the fourth embodiment only different parts from the detection device 20 equipped with the arithmetic device 5 according to the first embodiment will be described, and the rest will be omitted.
  • This embodiment differs from the detection device 20 in that the operation modes include a fifth mode and a sixth mode.
  • the machine learning model uses channel state information H1 to HN between the first transmitting antenna 4t1 to T-th transmitting antenna 4tT and the first receiving antenna 4r1 to R-th receiving antenna 4rR when it is not raining or snowing as training data.
  • the first machine learning model to be used and the channel state information H1 to HN between the first transmitting antenna 4t1 to T-th transmitting antenna 4tT and the first receiving antenna 4r1 to R-th receiving antenna 4rR when it is raining or snowing are trained. It contains a second machine learning model to use as data.
  • the first machine learning model provides channel state information between the first transmitting antenna 4t1 to the Tth transmitting antenna 4tT and the first receiving antenna 4r1 to the Rth receiving antenna 4rR when it is not raining or snowing.
  • Teacher data indicating the relationship between H1 to HN, the position of the object 2 within the first region, the movement of the object 2, the position of the person 3, and the movement of the person 3 is used.
  • the second machine learning model provides channel state information H1 to HN between the first transmitting antenna 4t1 to T-th transmitting antenna 4tT and the first receiving antenna 4r1 to R-th receiving antenna 4rR when it is raining or snowing. , the position of the object 2, the movement of the object 2, the position of the person 3, and the movement of the person 3 in the first area.
  • step S12 when the computing device 5 acquires weather information indicating that it is not raining or snowing (FIG. 10: step S12), it selects the fifth mode (FIG. 10: step S13c). On the other hand, when obtaining weather information indicating that it is raining or snowing ( FIG. 10 : step S12), arithmetic device 5 selects the sixth mode ( FIG. 10 : step S23c).
  • the computing device 5 detects the position of the object 2, the position of the person 3, or the movement of the person 3 in the first region using the first machine learning model in the fifth mode (FIG. 10: step S16c).
  • the computing device 5 detects the position of the object 2, the position of the person 3, or the movement of the person 3 in the first area using the second machine learning model in the sixth mode (FIG. 10: detection step S26c).
  • the arithmetic device 5 as described above also has the same effects as the arithmetic device 5 according to the first embodiment.
  • the machine learning model calculates the channel state information H1 to A first machine learning model using HN as training data and channel state information between the first transmitting antenna 4t1 to T-th transmitting antenna 4tT and the first receiving antenna 4r1 to R-th receiving antenna 4rR when it is raining or snowing. It includes a second machine learning model that uses H1 through HN as training data. As a result, it is possible to suppress deterioration in detection accuracy of the position of the object 2, the position of the person 3, or the movement of the person 3 in the first area due to the presence or absence of rain or snow. As a result, the computing device 5 according to the fourth embodiment can sense the surroundings with higher accuracy regardless of whether it is raining or snowing.
  • the arithmetic device 5 when acquiring weather information indicating that it is not raining or snowing, uses the first machine learning model to determine the position of the object 2 in the first region, the number of people Select a fifth mode that detects the position of 3 or the movement of person 3 .
  • the arithmetic device 5 acquires weather information indicating that it is raining or snowing, it uses the second machine learning model to determine the position of the object 2, the position of the person 3, or the position of the person 3 in the first region. Select the sixth mode of motion detection.
  • the computing device 5 according to the fourth embodiment can sense the surroundings with higher accuracy regardless of whether it is raining or snowing.
  • FIG. 11 is a flowchart showing processing executed by the arithmetic device 5 according to the fifth embodiment.
  • FIG. 12 shows an example of the amplitude and phase of the channel state information hmn between the m-th transmitting antenna 4tm and the n-th receiving antenna 4rn when the person 3 operates in the first area under fine weather according to the fifth embodiment. It is a figure which shows.
  • the horizontal axis indicates time and the vertical axis indicates amplitude or phase.
  • FIG. 12 shows an example of the amplitude and phase of the channel state information hmn between the m-th transmitting antenna 4tm and the n-th receiving antenna 4rn when the person 3 operates in the first area under fine weather according to the fifth embodiment. It is a figure which shows.
  • the horizontal axis indicates time and the vertical axis indicates amplitude or phase.
  • FIG. 12 shows an example of the amplitude and phase of the channel state information hmn between the m-th transmitting antenna 4tm and
  • FIG. 13 shows an example of the amplitude and phase of the channel state information hmn between the m-th transmitting antenna 4tm and the n-th receiving antenna 4rn when the person 3 operates in the first area in rainy weather according to the fifth embodiment. It is a figure which shows. In FIG. 13, the horizontal axis indicates time and the vertical axis indicates amplitude or phase. 12 and 13 are experimental results when the person 3 is seated on the rear seat of the passenger car 1 and is breathing. As for the detection device 20d including the arithmetic device 5 according to the fifth embodiment, only the parts different from the detection device 20 including the arithmetic device 5 according to the first embodiment will be described, and the rest will be omitted.
  • the computing device 5 acquires the channel state information H1 between the first to T-th transmitting antennas 4t1 to 4tT and the first to R-th receiving antennas 4r1 to 4rR in the acquisition step S12d shown in FIG. It differs from the detection device 20 in that it acquires weather information about the weather in the first area based on HN.
  • the path of electromagnetic waves changes when the environment through which the electromagnetic waves pass changes. Therefore, the path of electromagnetic waves changes depending on the presence or absence of rainfall or snowfall. More specifically, water adheres to the windows of passenger car 1 when it rains or snows. Therefore, the state of reflection of electromagnetic waves on the windows of the passenger car 1 changes depending on whether it is raining or snowing. Therefore, the channel state information H1 to HN between the first transmitting antenna 4t1 to T-th transmitting antenna 4tT and the first receiving antenna 4r1 to R-th receiving antenna 4rR can be determined whether it is raining or snowing at the position of the first area. has the property of changing when is changed.
  • the computing device 5 calculates channel state information H1 to HN between the first transmitting antenna 4t1 to T-th transmitting antenna 4tT and the first receiving antenna 4r1 to R-th receiving antenna 4rR (FIG. 11: calculation step S11d). ).
  • the computing device 5 calculates the first area based on the channel state information H1 to HN between the first transmitting antenna 4t1 to T-th transmitting antenna 4tT and the first receiving antenna 4r1 to R-th receiving antenna 4rR. acquires weather information about the weather in (FIG. 11: acquisition step S12d).
  • the amplitude of the channel state information hmn between the m-th transmitting antenna 4tm and the n-th receiving antenna 4rn during breathing of the person 3 in the first area in fine weather shown in FIG. 12 is shown in FIG. It is different from the amplitude of the channel state information hmn between the m-th transmitting antenna 4tm and the n-th receiving antenna 4rn when the person 3 breathes in the first area in rainy weather.
  • the amplitude of the channel state information hmn between the m-th transmitting antenna 4tm and the n-th receiving antenna 4rn during breathing of the person 3 in the first region under fine weather shown in FIG. 12 is shown in FIG. It is smaller than the amplitude of the channel state information hmn between the m-th transmitting antenna 4tm and the n-th receiving antenna 4rn when the person 3 breathes in the first area in rainy weather. Therefore, the arithmetic device 5 calculates the channel state information H1 to HN between the first transmitting antenna 4t1 to the T-th transmitting antenna 4tT and the first receiving antenna 4r1 to the R-th receiving antenna 4rR. Weather information about the weather can be acquired. More specifically, the computing device 5 calculates the 1st The presence or absence of rain or snow in a region can be determined.
  • steps S14d through S17d and steps S24d through S27d shown in FIG. 11 are respectively the same as steps S13 through S16 and steps S23 through S26 shown in FIG. omitted.
  • the channel state information H1 to HN between the first transmitting antenna 4t1 to T-th transmitting antenna 4tT and the first receiving antenna 4r1 to R-th receiving antenna 4rR is determined by the presence or absence of rainfall or It has the property of changing when the presence or absence of snowfall changes.
  • the computing device 5 calculates the weather in the first area based on the channel state information H1 to HN between the first transmitting antenna 4t1 to T-th transmitting antenna 4tT and the first receiving antenna 4r1 to R-th receiving antenna 4rR. You can get weather information about As a result, even if the weather sensor that detects weather information on the weather in the first area does not acquire weather information on the weather in the first area, the computing device 5 can acquire weather information on the weather in the first area. can. As a result, according to the arithmetic device 5 according to the fifth embodiment, even when the weather information regarding the weather in the first region is not acquired from the weather sensor that detects the weather information regarding the weather in the first region, rain or snowfall can be detected. With or without it, the surroundings can be sensed with higher accuracy.
  • the arithmetic device includes the arithmetic device 5 according to the first embodiment, the arithmetic device 5 according to the second embodiment, the arithmetic device 5 according to the third embodiment, and the arithmetic device according to the fourth embodiment. 5. It is not limited to the arithmetic device 5 according to the fifth embodiment, and can be modified within the scope of the gist thereof.
  • the arithmetic device 5 according to the first embodiment the arithmetic device 5 according to the second embodiment, the arithmetic device 5 according to the third embodiment, the arithmetic device 5 according to the fourth embodiment, and the fifth embodiment
  • each of the machine learning model, the first machine learning model, and the second machine learning model may be a machine learning model that does not use teacher data.
  • the passenger car 1 does not have to have windows.
  • the vehicle is not limited to passenger car 1.
  • a vehicle may be, for example, a golf cart, an airplane, a rocket, a train, a helicopter, or a watercraft.
  • the first area is not limited to the cabin 10 of the vehicle.
  • Cabin 10 may be, for example, a trunk or cargo compartment.
  • the first area may be, for example, an internal space of a building. Even in this case, the same effect as that of the detection device 20 can be obtained.
  • the first area does not have to be a closed space.
  • the first area may be connected to an area outside the first area.
  • the arithmetic device 5 estimates the noise ni from the mechanical characteristics and electromagnetic characteristics of each of the first transmitting antenna 4t1 to T-th transmitting antenna 4tT and each of the first receiving antenna 4r1 to R-th receiving antenna 4rR, Noise ni may be removed.
  • Person 3 is not limited to adults. Person 3 may be, for example, a child or a baby.
  • the position of the object 2 or the position of the person 3 is not limited to above the seat.
  • the position of the object 2 or the position of the person 3 may for example be under the seat.
  • electromagnetic waves are not limited to Wi-Fi (registered trademark).
  • the electromagnetic wave may be, for example, Bluetooth (registered trademark) or the like.
  • the arithmetic device 5 causes the first receiving antenna 4r1 to the R-th receiving antenna 4rR to transmit electromagnetic waves with the first sensitivity, and in the second mode, with the second sensitivity stronger than the first sensitivity, Electromagnetic waves may be received by the first receiving antenna 4r1 to the R-th receiving antenna 4rR.
  • the arithmetic device 5 causes the first transmitting antenna 4t1 to the T-th transmitting antenna 4tT to transmit electromagnetic waves having the first intensity in the third mode, and the second intensity stronger than the first intensity in the fourth mode. may be transmitted from the first transmitting antenna 4t1 to the T-th transmitting antenna 4tT.
  • the first intensity and the second intensity may be the same intensity.
  • the arithmetic device 5 is not limited to being arranged within the first region.
  • the computing device 5 may be arranged outside the first area, or may be arranged inside and outside the first area.
  • the weather information regarding the weather in the first region is not limited to whether it rains or snows, and may be, for example, the presence of hail or the presence of volcanic ash.
  • the first receiving antenna 4r1 to the R-th receiving antenna 4rR receive electromagnetic waves with a second sensitivity stronger than the first sensitivity. It is not limited to setting the second amplification factor higher than the gain, and other methods may be used.

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Abstract

Un dispositif de calcul selon la présente invention exécute les étapes suivantes : une étape d'acquisition pour acquérir des informations météorologiques relatives aux conditions météorologiques dans une première région ; une étape de sélection d'un mode de fonctionnement sur la base des informations météorologiques acquises dans l'étape d'acquisition ; une étape de réglage d'intensité de transmission d'ondes électromagnétiques, transmise par une première antenne de transmission par l'intermédiaire d'une T-ième antenne de transmission, sur la base du mode de fonctionnement sélectionné, ou une étape de réglage de la sensibilité de réception d'ondes magnétiques reçues par une première antenne de réception par l'intermédiaire d'une R-ième antenne de réception ; une étape de calcul pour calculer des informations d'état de canal, qui indiquent l'état de trajets de transmission d'ondes électromagnétiques entre la première antenne de transmission par l'intermédiaire de la T-ième antenne de transmission et de la première antenne de réception par l'intermédiaire de la R-ième antenne de transmission, sur la base de signaux d'une première sous-porteuse par l'intermédiaire d'une nième sous-porteuse telle que reçue par la première antenne de réception par l'intermédiaire de la R-ième antenne de transmission ; et une étape de détection pour détecter des positions d'objets, des positions de personnes, ou un mouvement de personnes à l'intérieur de la première région sur la base des informations d'état de canal calculées dans l'étape de calcul.
PCT/JP2022/047897 2022-01-12 2022-12-26 Dispositif de calcul et programme de calcul WO2023136112A1 (fr)

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