WO2015072433A1 - Wireless sensor system - Google Patents

Wireless sensor system Download PDF

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Publication number
WO2015072433A1
WO2015072433A1 PCT/JP2014/079761 JP2014079761W WO2015072433A1 WO 2015072433 A1 WO2015072433 A1 WO 2015072433A1 JP 2014079761 W JP2014079761 W JP 2014079761W WO 2015072433 A1 WO2015072433 A1 WO 2015072433A1
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WO
WIPO (PCT)
Prior art keywords
signal
unit
control
detection
sensor
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PCT/JP2014/079761
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French (fr)
Japanese (ja)
Inventor
大滝　幸夫
▲貞▼旬 金
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アルプス電気株式会社
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Application filed by アルプス電気株式会社 filed Critical アルプス電気株式会社
Priority to JP2015547754A priority Critical patent/JP6126700B2/en
Publication of WO2015072433A1 publication Critical patent/WO2015072433A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2209/00—Arrangements in telecontrol or telemetry systems
    • H04Q2209/80—Arrangements in the sub-station, i.e. sensing device
    • H04Q2209/88—Providing power supply at the sub-station

Definitions

  • the present invention relates to a wireless sensor system, and more particularly to a wireless sensor system that detects the movement of an object using a high-frequency wireless signal.
  • a wireless sensor system that detects the movement of an object using a high-frequency wireless signal in a band such as UWB (Ultra-Wideband) and its reflected signal has been put into practical use.
  • UWB Ultra-Wideband
  • Such a system is used in a system for monitoring the breathing, heart rate, and sleeping action of a sleeping person.
  • FIG. 9 is an explanatory diagram showing the configuration of the radio frequency sensor 310 according to Patent Document 1. As shown in FIG.
  • the radio frequency sensor 310 includes a local oscillator 311, an RF transmitter 312, an RF receiver 313, an amplifier 314, a mixer 315, and a low-pass filter 316.
  • the radio frequency sensor 310 further includes an arithmetic control circuit (not shown).
  • the local oscillator 311 generates a high frequency signal.
  • the RF transmitter 312 wirelessly transmits the electrical signal generated by the local oscillator 311 toward a subject (object) such as a human.
  • the RF receiver 313 wirelessly receives a reflected signal obtained by reflecting the transmission signal of the RF transmitter 312 from the subject.
  • the amplifier 314 amplifies the reflected signal wirelessly received by the RF receiver 313.
  • the mixer 315 mixes the amplified reflected signal with a part of the transmission signal.
  • the low pass filter 316 removes noise components from the output signal of the mixer 315.
  • the output signal of the low-pass filter 316 is an unprocessed sensor signal that includes information about the subject's motion, breathing, and cardiac activity.
  • the arithmetic control circuit controls various circuits such as the local oscillator 311, the RF transmitter 312, the RF receiver 313, the amplifier 314, the mixer 315, and the low-pass filter 316.
  • the arithmetic control circuit obtains an unprocessed sensor signal from the low-pass filter 316, and calculates motion information related to the motion, breathing, and cardiac activity of the subject based on the obtained unprocessed sensor signal. In this way, the radio frequency sensor 310 detects the movement of the subject.
  • the arithmetic control circuit performs complicated signal processing for calculating operation information and controlling various circuits of the radio frequency sensor 310, and accordingly, the radio frequency sensor 310 is large. Electricity was consumed. As a result, suppression of power consumption of the radio frequency sensor 310 has been hindered.
  • the present invention has been made in view of such a state of the art, and an object thereof is to provide a wireless sensor system capable of suppressing power consumption of a sensor device.
  • the wireless sensor system detects a movement of the object using a detection signal that is a high-frequency signal for detection and a reflection signal of the detection signal from the object.
  • a wireless sensor system comprising: a sensor unit that performs a motion of the object and controls the sensor unit, wherein the sensor unit generates a first signal that generates the detection signal
  • a first transmission unit that wirelessly transmits the detection signal
  • a first reception unit that wirelessly receives the reflected signal and a control signal that is a high-frequency signal for control, and a mixture of the detection signal and the reflected signal
  • a first detection unit that generates detection data based on the signal
  • a second detection unit that detects control information related to control of the sensor unit from the control signal, and modulation of the detection signal based on the detection data
  • a first control unit that executes control of the sensor unit based on the control information, and the arithmetic control unit wirelessly transmits the control signal to a second signal generation unit that generates the control signal.
  • a second control unit that generates the control information based on a calculation result of the calculation unit and modulates the control signal based on the control information, and the sensor unit and The detection data and the control information are transmitted using wireless communication with the calculation control unit.
  • the sensor unit (sensor device) includes a first transmission unit that wirelessly transmits a detection signal and a first reception unit that wirelessly receives a reflected signal and a control signal.
  • the arithmetic control unit includes a second transmission unit that wirelessly transmits a control signal and a second reception unit that wirelessly receives a detection signal. Therefore, wireless communication is possible between the sensor unit and the calculation control unit, and detection data and control signals can be transmitted using wireless communication between the sensor unit and the calculation control unit.
  • the 2nd control part of a calculation control part produces
  • the 1st control part of a sensor part performs control of a sensor part based on control information
  • Complicated for controlling a sensor part Signal processing can be performed on the calculation control unit side.
  • the calculation control unit performs complex signal processing for calculating the movement of the object by the calculation unit of the calculation control unit calculating the movement of the object using the detection data transmitted from the sensor unit. be able to.
  • the sensor unit does not have to perform complicated signal processing for calculating the movement of the object or controlling the sensor unit itself. And thereby, power consumption of the sensor unit can be suppressed.
  • the detection data is transmitted as the modulation component of the detection signal, the circuit configuration of the first transmission unit can be simplified.
  • the wireless sensor system wherein the sensor unit and the calculation control unit are a first time zone in which the first transmission unit wirelessly transmits the detection signal, and the second transmission unit is the control signal. It is characterized in that it operates by dividing the time into a second time zone for wireless transmission.
  • the sensor unit and the calculation control unit include a first time zone in which the first transmission unit wirelessly transmits the detection signal, and a second time zone in which the second transmission unit wirelessly transmits the control signal.
  • the sensor unit includes at least one of frequency variable means for changing a frequency of the detection signal and signal intensity variable means for changing the signal intensity of the detection signal. It is characterized by having.
  • the frequency variable means changes the frequency of the detection signal, thereby interfering with other wireless signals. Can be suppressed. Moreover, interference by other radio signals can also be suppressed by the signal strength varying means changing the signal strength of the detection signal. As a result, the detection sensitivity of the sensor unit can be stabilized.
  • the sensor unit includes at least one of a first phase variable unit that changes a phase of the detection signal and a second phase variable unit that changes the phase of the reflected signal. It is characterized by having one.
  • the detection sensitivity when the distance between the sensor unit and the object changes, the detection sensitivity can be optimized by the first phase adjusting means changing the phase of the detection signal.
  • the detection sensitivity can also be optimized by the second phase adjusting means changing the phase of the reflected signal. As a result, the detection sensitivity of the sensor unit can be stabilized.
  • the wireless sensor system includes a plurality of the sensor units, and the calculation control unit transmits the control information for each of the plurality of sensor units.
  • the calculation control unit calculates the movement of the object based on the detection data detected by the plurality of sensor units, so that the movement of the object can be detected more reliably.
  • the calculation control unit transmits control information for each of the plurality of sensor units, control for each sensor unit becomes possible, and the detection sensitivity of the sensor unit is stabilized, or wireless communication between the sensor unit and the calculation control unit is possible. It becomes easy to stabilize communication.
  • FIG. 1 is an explanatory diagram showing a configuration of a wireless sensor system 1 according to the first embodiment of the present invention.
  • FIG. 2 is a block diagram showing the configuration of the sensor unit 10 and the calculation control unit 20 shown in FIG.
  • FIG. 2A is a block diagram illustrating the configuration of the sensor unit 10
  • FIG. 2B is a block diagram illustrating the configuration of the arithmetic control unit 20.
  • FIG. 3 is a more detailed block diagram showing the circuit configuration of the sensor unit 10 shown in FIG.
  • FIG. 4 is a more detailed block diagram showing the circuit configuration of the arithmetic control unit 20 shown in FIG.
  • the wireless sensor system 1 is a system that detects the movement of an object using a high-frequency wireless signal and its reflected signal, and is a system for monitoring the breathing, heart rate, and sleeping operation of a sleeping person. Used for etc.
  • a high-frequency signal in a predetermined frequency band is used as the wireless signal for the wireless sensor system 1.
  • the wireless sensor system 1 includes a sensor unit 10 and an arithmetic control unit 20 as shown in FIG.
  • the sensor unit 10 and the calculation control unit 20 are arranged separately from each other.
  • the sensor unit 10 wirelessly transmits a detection signal, which is a high-frequency signal for detection, to the object 30 and wirelessly receives a reflection signal of the detection signal from the object. And the sensor part 10 detects the motion of the target object 30 based on the mixed signal of a detection signal and its reflected signal, and has produced
  • the sensor unit 10 and the calculation control unit 20 can perform wireless communication, and the generated detection data is converted into a detection signal, and calculation control is performed from the sensor unit 10 using wireless communication between the sensor unit 10 and the calculation control unit 20. Is transmitted to the unit 20.
  • the calculation control unit 20 calculates the movement of the object 30 based on the detection data transmitted from the sensor unit 10.
  • the calculation control unit 20 determines whether or not the sensor unit 10 needs to be controlled based on the calculation result. If the calculation control unit 20 determines that control is necessary, the calculation control unit 20 generates control information related to the control of the sensor unit 10.
  • the generated control information is transmitted from the calculation control unit 20 to the sensor unit 10 using wireless communication between the sensor unit 10 and the calculation control unit 20.
  • the arithmetic control unit 20 controls the sensor unit 10 using control information transmitted to the sensor unit 10.
  • the sensor unit 10 includes a first signal generation unit 11, a first transmission unit 12, a first reception unit 13, a first detection unit 14, a second detection unit 15, and a first control unit. 16.
  • the first signal generation unit 11 includes a local oscillator 11a, a mixer 11b, and a band pass filter 11c.
  • the first signal generator 11 generates a detection signal.
  • the local oscillator 11a generates a high frequency signal that becomes a detection signal.
  • the mixer 11b mixes the output signal of the local oscillator 11a and the electric signal generated by the first control unit 16.
  • the band pass filter 11c removes noise components from the output signal of the mixer 11b.
  • the output signal of the band pass filter 11c becomes a detection signal.
  • the detection signal generated by the first signal generator 11 is transmitted to the first transmitter 12. A part of the detection signal is also transmitted to the first detector 14.
  • the oscillation frequency of the local oscillator 11a can be changed, which is a frequency variable means for changing the frequency of the detection signal.
  • the first control unit 16 controls the oscillation frequency of the local oscillator 11a.
  • the detection signal can be modulated by mixing the output signal of the local oscillator 11a and the electric signal generated by the first control unit 16.
  • the first control unit 16 performs modulation on the detection signal.
  • the first transmission unit 12 includes a transmission antenna 12a, a bandpass filter 12b, a transmission amplifier 12c, and a phase shifter 12d.
  • the first transmitter 12 wirelessly transmits a detection signal through the transmission antenna 12a.
  • the band pass filter 12b removes a noise component of the detection signal.
  • the transmission amplifier 12c amplifies the detection signal so that the signal intensity of the detection signal becomes a predetermined value.
  • the phase shifter 12d shifts the phase of the detection signal.
  • the phase shift amount of the phase shifter 12d can be changed, and is a first phase variable means for changing the phase of the detection signal.
  • the first control unit 16 controls the phase shift amount of the phase shifter 12d.
  • the gain of the transmission amplifier 12c can be changed, and it is a signal strength variable means for changing the signal strength of the detection signal.
  • the gain of the transmission amplifier 12c is controlled by the first control unit 16.
  • the first reception unit 13 includes a reception antenna 13a, a bandpass filter 13b, a reception amplifier 13c, a phase shifter 13d, and a changeover switch 13e.
  • the first receiving unit 13 wirelessly receives the reflected signal of the detection signal from the object 30 and the control signal that is a high-frequency signal for control through the receiving antenna 13a.
  • the control signal includes control information related to the control of the sensor unit 10 as a modulation component.
  • the bandpass filter 13b removes noise components from the reflected signal and control signal received wirelessly.
  • the reception amplifier 13c amplifies the reflected signal and the control signal received wirelessly so as to obtain a predetermined reception sensitivity.
  • the phase shifter 13d shifts the phase of the reflected signal.
  • the changeover switch 13e switches the transmission direction of the reflected signal and the control signal received wirelessly.
  • the phase shift amount of the phase shifter 13d can be changed, which is a second phase variable means for changing the phase of the reflected signal.
  • the first control unit 16 controls the phase shift amount of the phase shifter 13d.
  • the change of the transmission direction of the changeover switch 13e is controlled by the first controller 16 so that the reflected signal is transmitted to the first detector 14 and the control signal is transmitted to the second detector 15.
  • the 1st detection part 14 has the mixer 14a and the low-pass filter 14b, as shown in FIG.
  • the first detector 14 generates detection data based on a mixed signal of the detection signal generated by the first signal generator 11 and the reflected signal wirelessly received by the first receiver 13.
  • the mixer 14a mixes the detection signal and the reflected signal.
  • the low pass filter 14b removes a noise component of the output signal of the mixer 14a.
  • the output signal of the low-pass filter 14b is converted into detection data via an A / D conversion circuit (not shown). Detection data detected by the first detection unit 14 is transmitted to the first control unit 16.
  • the second detector 15 has a local oscillator 15a, a mixer 15b, and a low-pass filter 15c. Then, the second detector 15 detects control information from the control signal wirelessly received by the first receiver 13.
  • the local oscillator 15a generates a high-frequency signal for detection.
  • the mixer 15b mixes the control signal with the output signal of the local oscillator 15a.
  • the low pass filter 15c removes a noise component of the output signal of the mixer 15b.
  • the output signal of the low-pass filter 15c is converted into control information via an A / D conversion circuit (not shown).
  • the control information detected by the second detector 15 is transmitted to the first controller 16.
  • the first control unit 16 As the first control unit 16, a control LSI or the like is used.
  • the first controller 16 generates an electrical signal for modulation based on the detection data generated by the first detector 14, and modulates the detection signal using the generated electrical signal.
  • the detection signal is a signal including detection data as a modulation component.
  • the first control unit 16 executes control of the sensor unit 10 based on the control information detected by the second detection unit 15.
  • the function of the sensor unit 10 controlled by the first control unit 16 is based on the oscillation frequency of the local oscillator 11a, the gain of the transmission amplifier 12c, the phase shift amount of the phase shifter 12d, the phase shift amount of the phase shifter 13d, and the like. is there.
  • the calculation control unit 20 includes a second signal generation unit 21, a second transmission unit 22, a second reception unit 23, a third detection unit 24, a calculation unit 25, and a second control unit 26. is doing.
  • the second signal generator 21 includes a local oscillator 21a, a mixer 21b, and a band-pass filter 21c.
  • the second signal generator 21 generates a control signal.
  • the local oscillator 21a generates a high frequency signal that becomes a control signal.
  • the mixer 21b mixes the output signal of the local oscillator 21a and the electric signal generated by the second control unit 26.
  • the bandpass filter 21c removes noise components from the output signal of the mixer 15b.
  • the output signal of the band pass filter 21c becomes a control signal.
  • the control signal generated by the second signal generator 21 is transmitted to the second transmitter 22.
  • the second control unit 26 can modulate the control signal by mixing the output signal of the local oscillator 21a and the electric signal generated by the second control unit 26.
  • the second control unit 26 performs modulation to the control signal.
  • the second transmission unit 22 includes a transmission antenna 22a, a bandpass filter 22b, and a transmission amplifier 22c.
  • the second transmitter 22 wirelessly transmits the control signal generated by the second signal generator 21 through the transmission antenna 22a.
  • the band pass filter 22b removes the noise component of the control signal.
  • the transmission amplifier 22c amplifies the control signal so that the signal strength of the control signal becomes a predetermined value.
  • the second receiving unit 23 includes a receiving antenna 23a, a bandpass filter 23b, and a receiving amplifier 23c.
  • the second receiving unit 23 wirelessly receives the detection signal from the sensor unit 10 through the receiving antenna 23a.
  • the band pass filter 23b removes a noise component of the detection signal received wirelessly.
  • the reception amplifier 23c amplifies the detection signal so as to obtain a predetermined reception sensitivity.
  • the detection signal wirelessly received by the second reception unit 23 is transmitted to the third detection unit 24.
  • the 3rd detection part 24 has the local oscillator 24a, the mixer 24b, and the low-pass filter 24c, as shown in FIG. And the 3rd detection part 24 has detected detection data from the modulation
  • the local oscillator 24a generates a high-frequency signal for detection.
  • the mixer 24b mixes the detection signal wirelessly received by the second receiver 23 with the output signal of the local oscillator 24a.
  • the low pass filter 24c removes noise components from the output signal of the mixer 24b.
  • the output signal of the low-pass filter 24c is converted into detection data via an A / D conversion circuit (not shown). Detection data detected by the third detection unit 24 is transmitted to the calculation unit 25.
  • the calculation unit 25 calculates the movement of the object 30 based on the detection data detected by the third detection unit 24. Information regarding the movement of the object 30 calculated by the calculation unit 25 is transmitted to the second control unit 26.
  • the second control unit 26 determines whether or not the sensor unit 10 needs to be controlled based on the calculation result of the calculation unit 25.
  • the second control unit 26 generates control information for controlling the sensor unit 10 when determining that the control of the sensor unit 10 is necessary.
  • the second control unit 26 generates an electrical signal for modulation based on the control information, and modulates the control signal using the generated electrical signal.
  • the control signal is a signal including control information as a modulation component.
  • FIG. 5 is an explanatory diagram illustrating transmission timings of the detection signal and the control signal according to the embodiment of the present invention.
  • FIG. 5A is an explanatory diagram illustrating the transmission timing of the detection signal that is wirelessly transmitted by the sensor unit 10
  • FIG. 5B is an explanatory diagram that illustrates the transmission timing of the control signal that is wirelessly transmitted by the arithmetic control unit 20. It is.
  • the horizontal axis is time.
  • the sensor unit 10 and the calculation control unit 20 operate by dividing time into a first time zone t1 and a second time zone t2.
  • the first transmission unit 12 of the sensor unit 10 wirelessly transmits a detection signal.
  • the wireless transmission of the detection signal is performed to detect the movement of the object 30 (execution of detection).
  • the wireless transmission of the detection signal is also performed to transmit the detection data obtained by the detection to the arithmetic control unit 20 (transmission of the detection data).
  • the second reception unit 23 wirelessly receives the detection signal, and the third detection unit 24 detects detection data from the wirelessly received detection signal.
  • the calculation unit 25 calculates the movement of the object 30 based on the detected detection data
  • the second control unit 26 generates control information based on the calculation result of the calculation unit 25.
  • the second transmission unit 22 of the calculation control unit 20 wirelessly transmits a control signal.
  • the wireless transmission of the control signal is performed to transmit control information related to the control of the sensor unit 10 to the sensor unit 10 (transmission of control information).
  • the first receiving unit 13 wirelessly receives the control signal
  • the second detection unit 15 detects the control information from the wirelessly received control signal.
  • the 1st control part 16 is performing control of sensor part 10 based on detected control information.
  • detection by the sensor unit 10 and transmission of detection data from the sensor unit 10 to the arithmetic control unit 20 are performed simultaneously in the first time period t1. And in the arithmetic control part 20, control information is produced
  • the operations of the sensor unit 10 and the calculation control unit 20 in the first time zone t1 and the operations of the sensor unit 10 and the calculation control unit 20 in the second time zone t2 are repeatedly performed. .
  • FIG. 6 is a flowchart showing a detection procedure according to the embodiment of the present invention.
  • steps Sa ⁇ b> 1 to Sa ⁇ b> 7 are steps showing the operation procedure of the sensor unit 10.
  • steps Sb1 to Sb7 are steps showing an operation procedure of the arithmetic control unit 20.
  • step Sa1 detection data is initialized (step Sa1).
  • the first transmission unit 12 wirelessly transmits the detection signal
  • the first reception unit 13 wirelessly receives the reflection signal
  • the first detection unit 14 detects detection data based on the detection signal and the reflection signal. Is generated (step Sa2).
  • the detection signal wirelessly transmitted in step S2 includes detection data as a modulation component.
  • the second receiving unit 23 waits for detection data from the sensor unit 10 (step Sb1). Then, corresponding to step Sa2, the second receiving unit 23 wirelessly receives the detection signal (step Sb2). Next, the third detector 24 detects detection data from the detection signal (step Sb3). Next, the calculating part 25 calculates the motion of the target object 30 using detection data (step Sb4). Next, the second control unit 26 determines whether or not the sensor unit 10 needs to be controlled (necessity) based on the calculation result of the calculation unit 25 (step Sb5).
  • step Sb5 If it is determined in step Sb5 that the control of the sensor unit 10 is unnecessary, the process returns to step Sb1, and the procedure from step Sb1 to step Sb5 is repeated.
  • step Sb5 when it is determined that the control of the sensor unit 10 is necessary, the second control unit 26 generates predetermined control information (step Sb6). And the control signal containing the control information which the 2nd transmission part 22 generated is wirelessly transmitted to sensor part 10 (Step Sb7).
  • step Sa3 the first receiving unit 13 waits for control information from the calculation control unit 20 (step Sa3). Then, the first control unit 16 makes a determination based on the presence / absence of wireless reception of the control signal from the arithmetic control unit 20 (step Sa4). If there is no wireless reception of the control signal in step Sa4, the process returns to step Sa1, and the procedure from step Sa1 to step Sa4 is repeated.
  • step Sa4 when the control signal is received wirelessly, the first control unit 16 makes a determination based on whether the control signal is a signal addressed to itself (step Sa5).
  • step Sa5 when the control signal is not a signal addressed to itself, the process returns to step Sa1, and the procedure from step Sa1 to step Sa5 is repeated.
  • step Sa5 when the control signal is a signal addressed to itself, the second detector 15 detects control information from the control signal (step Sa6). And the 1st control part 16 performs control of sensor part 10 based on detected control information (Step Sa7). Then, it returns to step Sa1 and repeats the procedure from step Sa1 to step Sa7.
  • the detection data and the control information are transmitted using the wireless communication between the sensor unit 10 and the calculation control unit 20 in this way.
  • the calculation control part 20 is calculating the motion of the target object 30 using the detection data transmitted to the calculation control part 20 from the sensor part 10.
  • the calculation control unit 20 controls the sensor unit 10 using the control information transmitted from the calculation control unit 20 to the sensor unit 10.
  • the functions of the sensor unit 10 controlled by the second control unit 26 using the control information include the oscillation frequency of the local oscillator 11a, the gain of the transmission amplifier 12c, the phase shift amount of the phase shifter 12d, and the phase shifter 13d. The amount of phase shift.
  • the sensor unit 10 (sensor device) includes a first transmission unit 12 that wirelessly transmits a detection signal, and a first reception unit 13 that wirelessly receives a reflection signal and a control signal.
  • the arithmetic control unit 20 includes a second transmission unit 22 that wirelessly transmits a control signal and a second reception unit 23 that wirelessly receives a detection signal. Therefore, wireless communication is possible between the sensor unit 10 and the calculation control unit 20, and the detection data and the control signal are transmitted using the wireless communication between the sensor unit 10 and the calculation control unit 20. be able to.
  • the second control unit 26 of the arithmetic control unit 20 generates control information, and the first control unit 16 of the sensor unit 10 executes control of the sensor unit 10 based on the control information, thereby controlling the sensor unit 10.
  • Complicated signal processing for performing the processing can be performed on the arithmetic control unit 20 side.
  • the calculation unit 25 of the calculation control unit 20 calculates the movement of the object 30 using the detection data transmitted from the sensor unit 10, thereby calculating complex signal processing for calculating the movement of the object 30. This can be done on the control unit 20 side.
  • the sensor unit 10 does not need to perform complicated signal processing for calculating the movement of the object 30 or controlling the sensor unit 10 itself. And thereby, the power consumption of the sensor unit 10 can be suppressed.
  • the detection data is transmitted as the modulation component of the detection signal, the circuit configuration of the first transmission unit 12 can be simplified.
  • the sensor unit 10 and the calculation control unit 20 are the first time zone t1 in which the first transmission unit 12 wirelessly transmits the detection signal, and the second transmission unit 22 is the control signal.
  • the second transmission unit 22 is the control signal.
  • the wireless sensor unit 10 in an environment where another wireless signal having the same frequency as that of the detection signal or a frequency close thereto is used, the other wireless signal interferes with the detection signal and the sensor unit 10 detects the signal. There was a possibility of lowering the sensitivity.
  • the sensor unit 10 includes a frequency variable unit (first signal generation unit 11) that changes the frequency of the detection signal, and a signal strength variable unit that changes the signal intensity of the detection signal (first signal generation unit 11).
  • a transmission amplifier 12c Therefore, when another radio signal having the same frequency as that of the detection signal or a frequency close thereto is used, the frequency variable means can change the frequency of the detection signal, thereby suppressing interference due to the other radio signal.
  • the signal intensity varying means increasing (changing) the signal intensity of the detection signal.
  • the detection sensitivity of the sensor unit can be stabilized.
  • the wireless sensor unit 10 when used in an environment where the distance between the sensor unit 10 and the object 30 changes, the phase of the detection signal and the reflection signal input to the first detection unit 14 are changed. There is a possibility that the detection sensitivity of the sensor unit 10 may be lowered due to the deviation from the phase.
  • the sensor unit 10 includes the first phase variable means (phase shifter 12d) that changes the phase of the detection signal and the second phase variable means (shift that changes the phase of the reflected signal). Phaser 13d). Therefore, even when the distance between the sensor unit and the object changes, the detection sensitivity can be optimized by the first phase varying means changing the phase of the detection signal.
  • the detection sensitivity can also be optimized by the second phase varying means changing the phase of the reflected signal. As a result, the detection sensitivity of the sensor unit can be stabilized. Such an effect can be obtained if at least one of the first phase variable means and the second phase variable means is provided.
  • FIG. 7 is a block diagram showing a circuit configuration of the sensor unit 110 according to the second embodiment of the present invention.
  • the sensor unit 10 of the wireless sensor system 1 according to the first embodiment is replaced with a sensor unit 110.
  • the sensor unit 110 includes a first signal generation unit 11, a transmission / reception unit 112, a first detection unit 14, a second detection unit 15, and a first control unit 16.
  • the transmission / reception unit 112 includes a transmission / reception antenna 112a, a bandpass filter 112b, a changeover switch 112c, and a phase shifter 112d.
  • the detection signal wirelessly transmitted by the sensor unit 110 is wirelessly transmitted through the transmission / reception antenna 112a.
  • the reflected signal and the control signal received wirelessly by the sensor unit 110 are wirelessly received through the transmission / reception antenna 112a.
  • the band pass filter 112b removes a noise component of a signal transmitted and received by the sensor unit 110.
  • the changeover switch 112 c switches the transmission direction of the signal received wirelessly by the transmission / reception unit 112 so that the reflected signal is transmitted to the first detection unit 14 and the control signal is transmitted to the second detection unit 15.
  • the phase shifter 112d shifts the phases of the detection signal and the reflected signal.
  • the transmission / reception unit 112 of the present embodiment is a circuit having both the function of the first transmission unit 12 and the function of the first reception unit 13 of the sensor unit 10 of the first embodiment.
  • the transmission / reception unit 112 wirelessly transmits the detection signal generated by the first signal generation unit 11. Further, the transmission / reception unit 112 wirelessly receives the reflection signal of the detection signal from the object 30 and the control signal wirelessly transmitted from the arithmetic control unit 20.
  • the sensor unit 110 may have such a circuit configuration, for example. Then, the circuit configuration of the sensor unit 110 can be further simplified by integrally configuring the transmission circuit and the reception circuit like the sensor unit 110.
  • FIG. 8 is an explanatory diagram showing a configuration of a wireless sensor system 201 according to the third embodiment of the present invention.
  • the wireless sensor system 201 includes two (plural) sensor units 10 and one arithmetic control unit 20.
  • the arithmetic control unit 20 wirelessly transmits a control signal for each of the two sensor units 10, thereby transmitting control information for each of the two sensor units 10.
  • the configuration of the sensor unit 10 and the configuration of the calculation control unit 20 are the same as the configuration of the sensor unit 10 and the calculation control unit 20 according to the first embodiment.
  • control including the destination information indicating which sensor unit 10 the signal is addressed to which sensor unit 10 has.
  • the control By transmitting the signal wirelessly, it becomes possible to transmit a control signal for each of the two sensor units 10.
  • the calculation control unit 20 calculates the movement of the object 30 based on the detection data detected by the two sensor units 10, thereby more reliably detecting the movement of the object 30. be able to.
  • the calculation control unit 20 transmits control information for each of the two sensor units 10, thereby enabling control for each sensor unit 10, stabilizing the detection sensitivity of the sensor unit 10, and the sensor unit 10 and the calculation control unit. It becomes easy to stabilize the wireless communication with 20.
  • the circuit configuration of the sensor unit 10 may be a circuit configuration other than that shown in FIG.
  • the circuit configuration of the arithmetic control unit 20 may be a circuit configuration other than that shown in FIG.
  • the circuit configuration of the sensor unit 110 may be a circuit configuration other than that shown in FIG.
  • the sensor unit 10 does not perform the detection and transmits the detection data at the same time, but detects the detection at different timings within the period of the first time period t1 shown in FIG.
  • the execution of and the transmission of detection data may be performed separately.
  • the wireless sensor system 201 may include more sensor units 10.
  • the arithmetic control unit 20 may transmit control information for each of the sensor units 10.

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Abstract

[Problem] To provide a wireless sensor system that can suppress power consumption of a sensor unit. [Solution] The wireless sensor system (1) is provided with a sensor unit (10) and a computation control unit (20), wherein the sensor unit (10) has a first signal generation unit (11), which generates a detection signal, a first transmission unit (12), which wirelessly transmits the detection signal, a first reception unit (13), which wirelessly receives a reflection signal and a control signal, a first detector unit (14), which generates detection data, a second detector unit (15), which detects control information, and a first control unit (16), which executes control of the sensor unit and applies modulation to the detection signal, and the computation control unit (20) has a second signal generation unit (21), which generates the control signal, a second transmission unit (22), which wirelessly transmits the control signal, a second reception unit (23), which wirelessly receives the detection signal, a third detector unit (24), which detects the detection data, a computation unit (25), which computes the movement of a subject, and a second control unit (26), which applies modulation to the control signal and generates the control information.

Description

無線センサシステムWireless sensor system
　本発明は、無線センサシステムに関し、特に、高周波の無線信号を用いて対象物の動きを検知する無線センサシステムに関する。 The present invention relates to a wireless sensor system, and more particularly to a wireless sensor system that detects the movement of an object using a high-frequency wireless signal.
　近年、ＵＷＢ（Ｕｌｔｒａ－Ｗｉｄｅｂａｎｄ）等の帯域の高周波の無線信号とその反射信号とを用いて対象物の動きを検知する無線センサシステムが実用化されている。このようなシステムは、睡眠中の人の呼吸や心拍数や睡眠中の動作等を監視するためのシステム等に利用されている。 In recent years, a wireless sensor system that detects the movement of an object using a high-frequency wireless signal in a band such as UWB (Ultra-Wideband) and its reflected signal has been put into practical use. Such a system is used in a system for monitoring the breathing, heart rate, and sleeping action of a sleeping person.
　このような無線センサシステムとしては、特許文献１に係る無線周波数センサ（センサ装置）を備えたシステム等が提案されている。図９は、特許文献１に係る無線周波数センサ３１０の構成を示す説明図である。 As such a wireless sensor system, a system including a radio frequency sensor (sensor device) according to Patent Document 1 has been proposed. FIG. 9 is an explanatory diagram showing the configuration of the radio frequency sensor 310 according to Patent Document 1. As shown in FIG.
　図９に示すように、無線周波数センサ３１０は、局部発振器３１１とＲＦ送信機３１２とＲＦ受信機３１３と増幅器３１４とミキサ３１５とローパスフィルタ３１６とを備えている。無線周波数センサ３１０は、更に、図示しない演算制御回路も備えている。 As shown in FIG. 9, the radio frequency sensor 310 includes a local oscillator 311, an RF transmitter 312, an RF receiver 313, an amplifier 314, a mixer 315, and a low-pass filter 316. The radio frequency sensor 310 further includes an arithmetic control circuit (not shown).
　局部発振器３１１は、高周波信号を生成している。ＲＦ送信機３１２は、局部発振器３１１が生成した電気信号を人間などの被験者（対象物）に向けて無線送信している。ＲＦ受信機３１３は、ＲＦ送信機３１２の送信信号が被験者から反射した反射信号を無線受信している。増幅器３１４は、ＲＦ受信機３１３が無線受信した反射信号を増幅している。ミキサ３１５は、増幅された反射信号を送信信号の一部と混合している。ローパスフィルタ３１６は、ミキサ３１５の出力信号のノイズ成分を除去している。ローパスフィルタ３１６の出力信号は、被験者の動作、呼吸、及び心活動に関する情報を含む未処理センサ信号となる。 The local oscillator 311 generates a high frequency signal. The RF transmitter 312 wirelessly transmits the electrical signal generated by the local oscillator 311 toward a subject (object) such as a human. The RF receiver 313 wirelessly receives a reflected signal obtained by reflecting the transmission signal of the RF transmitter 312 from the subject. The amplifier 314 amplifies the reflected signal wirelessly received by the RF receiver 313. The mixer 315 mixes the amplified reflected signal with a part of the transmission signal. The low pass filter 316 removes noise components from the output signal of the mixer 315. The output signal of the low-pass filter 316 is an unprocessed sensor signal that includes information about the subject's motion, breathing, and cardiac activity.
　演算制御回路は、局部発振器３１１とＲＦ送信機３１２とＲＦ受信機３１３と増幅器３１４とミキサ３１５とローパスフィルタ３１６等の各種回路を制御している。また、演算制御回路は、ローパスフィルタ３１６から未処理センサ信号を入手し、入手した未処理センサ信号に基づいて、被験者の動作、呼吸、及び心活動に関する動作情報を演算している。無線周波数センサ３１０は、このようにして、被験者の動きを検知している。 The arithmetic control circuit controls various circuits such as the local oscillator 311, the RF transmitter 312, the RF receiver 313, the amplifier 314, the mixer 315, and the low-pass filter 316. In addition, the arithmetic control circuit obtains an unprocessed sensor signal from the low-pass filter 316, and calculates motion information related to the motion, breathing, and cardiac activity of the subject based on the obtained unprocessed sensor signal. In this way, the radio frequency sensor 310 detects the movement of the subject.
特表２００９－５３８７２０Special table 2009-538720
　このような無線センサシステムにおいて、近年、電池交換の頻度を少なくする等の目的で、センサ装置の消費電力を抑制することが求められてきている。しかしながら、従来の無線周波数センサ３１０では、動作情報の演算や無線周波数センサ３１０の各種回路の制御のために、演算制御回路が複雑な信号処理を行っており、それに伴って無線周波数センサ３１０が大きな電力を消費していた。その結果、無線周波数センサ３１０の消費電力の抑制を阻害していた。 In such a wireless sensor system, in recent years, it has been demanded to suppress the power consumption of the sensor device for the purpose of reducing the frequency of battery replacement. However, in the conventional radio frequency sensor 310, the arithmetic control circuit performs complicated signal processing for calculating operation information and controlling various circuits of the radio frequency sensor 310, and accordingly, the radio frequency sensor 310 is large. Electricity was consumed. As a result, suppression of power consumption of the radio frequency sensor 310 has been hindered.
　本発明は、このような従来技術の実情に鑑みてなされたもので、その目的は、センサ装置の消費電力を抑制できる無線センサシステムを提供することにある。 The present invention has been made in view of such a state of the art, and an object thereof is to provide a wireless sensor system capable of suppressing power consumption of a sensor device.
　この課題を解決するために、請求項１に記載の無線センサシステムは、検知用の高周波信号である検知信号と対象物からの前記検知信号の反射信号とを用いて前記対象物の動きを検知するセンサ部と、前記対象物の動きを演算すると共に前記センサ部を制御する演算制御部と、を備えた無線センサシステムであって、前記センサ部は、前記検知信号を生成する第１信号発生部と、前記検知信号を無線送信する第１送信部と、前記反射信号と制御用の高周波信号である制御信号とを無線受信する第１受信部と、前記検知信号と前記反射信号との混合信号に基づいて検知データを生成する第１検波部と、前記制御信号から前記センサ部の制御に関する制御情報を検出する第２検波部と、前記検知データに基づいて前記検知信号に変調を加えると共に、前記制御情報に基づいて前記センサ部の制御を実行する第１制御部と、を有し、前記演算制御部は、前記制御信号を生成する第２信号発生部と、前記制御信号を無線送信する第２送信部と、前記検知信号を無線受信する第２受信部と、前記検知信号から前記検知データを検出する第３検波部と、前記検知データに基づいて前記対象物の動きを演算する演算部と、前記演算部の演算結果に基づいて前記制御情報を生成すると共に、前記制御情報に基づいて前記制御信号に変調を加える第２制御部と、を有し、前記センサ部と前記演算制御部との間の無線通信を利用して、前記検知データと前記制御情報との伝達を行うことを特徴とする。 In order to solve this problem, the wireless sensor system according to claim 1 detects a movement of the object using a detection signal that is a high-frequency signal for detection and a reflection signal of the detection signal from the object. A wireless sensor system comprising: a sensor unit that performs a motion of the object and controls the sensor unit, wherein the sensor unit generates a first signal that generates the detection signal A first transmission unit that wirelessly transmits the detection signal, a first reception unit that wirelessly receives the reflected signal and a control signal that is a high-frequency signal for control, and a mixture of the detection signal and the reflected signal A first detection unit that generates detection data based on the signal, a second detection unit that detects control information related to control of the sensor unit from the control signal, and modulation of the detection signal based on the detection data A first control unit that executes control of the sensor unit based on the control information, and the arithmetic control unit wirelessly transmits the control signal to a second signal generation unit that generates the control signal. A second transmitter for transmitting, a second receiver for wirelessly receiving the detection signal, a third detector for detecting the detection data from the detection signal, and calculating the movement of the object based on the detection data And a second control unit that generates the control information based on a calculation result of the calculation unit and modulates the control signal based on the control information, and the sensor unit and The detection data and the control information are transmitted using wireless communication with the calculation control unit.
　この構成の無線センサシステムでは、センサ部（センサ装置）は、検知信号を無線送信する第１送信部と、反射信号と制御信号とを無線受信する第１受信部と、を有している。また、演算制御部は、制御信号を無線送信する第２送信部と、検知信号を無線受信する第２受信部と、を有している。そのため、センサ部と演算制御部との間で無線通信が可能であり、センサ部と演算制御部との間の無線通信を利用して、検知データと制御信号との伝達を行うことができる。 In the wireless sensor system having this configuration, the sensor unit (sensor device) includes a first transmission unit that wirelessly transmits a detection signal and a first reception unit that wirelessly receives a reflected signal and a control signal. In addition, the arithmetic control unit includes a second transmission unit that wirelessly transmits a control signal and a second reception unit that wirelessly receives a detection signal. Therefore, wireless communication is possible between the sensor unit and the calculation control unit, and detection data and control signals can be transmitted using wireless communication between the sensor unit and the calculation control unit.
　そして、演算制御部の第２制御部が制御情報を生成し、センサ部の第１制御部が制御情報に基づいてセンサ部の制御を実行することによって、センサ部の制御を行うための複雑な信号処理を演算制御部側で行うことができる。また、演算制御部の演算部がセンサ部から伝達された検知データを用いて対象物の動きを演算することによって、対象物の動きを演算するための複雑な信号処理を演算制御部側で行うことができる。その結果、センサ部では、対象物の動きを演算したりセンサ部自身の制御を行ったりするための複雑な信号処理を行わなくても良くなる。そして、それによってセンサ部の消費電力を抑制することができる。しかも、検知信号の変調成分として検知データの伝達を行うので、第１送信部の回路構成を簡単にできる。 And the 2nd control part of a calculation control part produces | generates control information, and the 1st control part of a sensor part performs control of a sensor part based on control information, Complicated for controlling a sensor part Signal processing can be performed on the calculation control unit side. Further, the calculation control unit performs complex signal processing for calculating the movement of the object by the calculation unit of the calculation control unit calculating the movement of the object using the detection data transmitted from the sensor unit. be able to. As a result, the sensor unit does not have to perform complicated signal processing for calculating the movement of the object or controlling the sensor unit itself. And thereby, power consumption of the sensor unit can be suppressed. In addition, since the detection data is transmitted as the modulation component of the detection signal, the circuit configuration of the first transmission unit can be simplified.
　請求項２に記載の無線センサシステムでは、前記センサ部と前記演算制御部とは、前記第１送信部が前記検知信号を無線送信する第１時間帯と、前記第２送信部が前記制御信号を無線送信する第２時間帯と、に時間を分割して動作することを特徴とする。 The wireless sensor system according to claim 2, wherein the sensor unit and the calculation control unit are a first time zone in which the first transmission unit wirelessly transmits the detection signal, and the second transmission unit is the control signal. It is characterized in that it operates by dividing the time into a second time zone for wireless transmission.
　この構成の無線センサシステムでは、センサ部と演算制御部とが、第１送信部が検知信号を無線送信する第１時間帯と、第２送信部が制御信号を無線送信する第２時間帯と、に時間を分割して動作することによって、検知信号と制御信号との干渉を抑制することができる。その結果、センサ部と演算制御部との間の無線通信を安定させることができる。 In the wireless sensor system having this configuration, the sensor unit and the calculation control unit include a first time zone in which the first transmission unit wirelessly transmits the detection signal, and a second time zone in which the second transmission unit wirelessly transmits the control signal. By operating by dividing time into two, interference between the detection signal and the control signal can be suppressed. As a result, wireless communication between the sensor unit and the calculation control unit can be stabilized.
　請求項３に記載の無線センサシステムでは、前記センサ部は、前記検知信号の周波数を変化させる周波数可変手段と、前記検知信号の信号強度を変化させる信号強度可変手段と、のうちの少なくとも１つを有していることを特徴とする。 4. The wireless sensor system according to claim 3, wherein the sensor unit includes at least one of frequency variable means for changing a frequency of the detection signal and signal intensity variable means for changing the signal intensity of the detection signal. It is characterized by having.
この構成の無線センサシステムでは、検知信号と同じかそれに近い周波数の他の無線信号が使用されるような場合に、周波数可変手段が検知信号の周波数を変化させることによって、他の無線信号による干渉を抑制することができる。また、信号強度可変手段が検知信号の信号強度を変化させることによっても、他の無線信号による干渉を抑制することができる。その結果、センサ部の検知感度を安定させることができる。 In the wireless sensor system having this configuration, when another wireless signal having the same frequency as that of the detection signal or a frequency close thereto is used, the frequency variable means changes the frequency of the detection signal, thereby interfering with other wireless signals. Can be suppressed. Moreover, interference by other radio signals can also be suppressed by the signal strength varying means changing the signal strength of the detection signal. As a result, the detection sensitivity of the sensor unit can be stabilized.
　請求項４に記載の無線センサシステムでは、前記センサ部は、前記検知信号の位相を変化させる第１位相可変手段と、前記反射信号の位相を変化させる第２位相可変手段と、のうちの少なくとも１つを有していることを特徴とする。 The wireless sensor system according to claim 4, wherein the sensor unit includes at least one of a first phase variable unit that changes a phase of the detection signal and a second phase variable unit that changes the phase of the reflected signal. It is characterized by having one.
　この構成の無線センサシステムでは、センサ部と対象物との距離が変化するような場合に、第１位相調整手段が検知信号の位相を変化させることによって、検知感度を最適化することができる。また、第２位相調整手段が反射信号の位相を変化させることによっても、検知感度を最適化することができる。その結果、センサ部の検知感度を安定させることができる。 In the wireless sensor system with this configuration, when the distance between the sensor unit and the object changes, the detection sensitivity can be optimized by the first phase adjusting means changing the phase of the detection signal. The detection sensitivity can also be optimized by the second phase adjusting means changing the phase of the reflected signal. As a result, the detection sensitivity of the sensor unit can be stabilized.
　請求項５に記載の無線センサシステムは、複数の前記センサ部を備え、前記演算制御部は、複数の前記センサ部ごとに前記制御情報の伝達を行うことを特徴とする。 The wireless sensor system according to claim 5 includes a plurality of the sensor units, and the calculation control unit transmits the control information for each of the plurality of sensor units.
　この構成の無線センサシステムでは、演算制御部が複数のセンサ部が検出した検知データに基づいて対象物の動きを演算することによって、対象物の動きをより確実に検出することができる。また、演算制御部が複数のセンサ部ごとに制御情報を伝達することによって、センサ部ごとの制御が可能となり、センサ部の検知感度を安定させたり、センサ部と演算制御部との間の無線通信を安定させたりすることが容易となる。 In the wireless sensor system having this configuration, the calculation control unit calculates the movement of the object based on the detection data detected by the plurality of sensor units, so that the movement of the object can be detected more reliably. In addition, when the calculation control unit transmits control information for each of the plurality of sensor units, control for each sensor unit becomes possible, and the detection sensitivity of the sensor unit is stabilized, or wireless communication between the sensor unit and the calculation control unit is possible. It becomes easy to stabilize communication.
　本発明によれば、センサ装置（センサ部）の消費電力を抑制できる無線センサシステムを提供することができる。 According to the present invention, it is possible to provide a wireless sensor system capable of suppressing power consumption of a sensor device (sensor unit).
本発明の第１実施形態に係る無線センサシステム１の構成を示す説明図である。It is explanatory drawing which shows the structure of the wireless sensor system 1 which concerns on 1st Embodiment of this invention. 図１に示すセンサ部１０と演算制御部２０との構成を示すブロック図である。It is a block diagram which shows the structure of the sensor part 10 and the calculation control part 20 which are shown in FIG. 図１に示すセンサ部１０の回路構成を示すより詳細なブロック図である。It is a more detailed block diagram which shows the circuit structure of the sensor part 10 shown in FIG. 図１に示す演算制御部２０の回路構成を示すより詳細なブロック図である。FIG. 2 is a more detailed block diagram showing a circuit configuration of an arithmetic control unit 20 shown in FIG. 1. 本発明の実施形態に係る検知信号と制御信号との送信タイミングを示す説明図である。It is explanatory drawing which shows the transmission timing of the detection signal and control signal which concern on embodiment of this invention. 本発明の実施形態に係る検知の手順を示すフローチャートである。It is a flowchart which shows the procedure of the detection which concerns on embodiment of this invention. 本発明の第２実施形態に係るセンサ部１１０の回路構成を示すブロック図である。It is a block diagram which shows the circuit structure of the sensor part 110 which concerns on 2nd Embodiment of this invention. 本発明の第３実施形態に係る無線センサシステム２０１の構成を示す説明図である。It is explanatory drawing which shows the structure of the wireless sensor system 201 which concerns on 3rd Embodiment of this invention. 特許文献１に係る無線周波数センサ３１０の構成を示す説明図である。6 is an explanatory diagram showing a configuration of a radio frequency sensor 310 according to Patent Document 1.
　［第１実施形態］
　以下、本考案の第１実施形態について図面を参照しながら説明する。 [First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
　まず、本実施形態に係る無線センサシステム１の構成について、図１ないし図４を用いて説明する。図１は、本発明の第１実施形態に係る無線センサシステム１の構成を示す説明図である。図２は、図１に示すセンサ部１０と演算制御部２０との構成を示すブロック図である。図２（ａ）は、センサ部１０の構成を示すブロック図であり、図２（ｂ）は、演算制御部２０の構成を示すブロック図である。図３は、図１に示すセンサ部１０の回路構成を示すより詳細なブロック図である。図４は、図１に示す演算制御部２０の回路構成を示すより詳細なブロック図である。 First, the configuration of the wireless sensor system 1 according to the present embodiment will be described with reference to FIGS. 1 to 4. FIG. 1 is an explanatory diagram showing a configuration of a wireless sensor system 1 according to the first embodiment of the present invention. FIG. 2 is a block diagram showing the configuration of the sensor unit 10 and the calculation control unit 20 shown in FIG. FIG. 2A is a block diagram illustrating the configuration of the sensor unit 10, and FIG. 2B is a block diagram illustrating the configuration of the arithmetic control unit 20. FIG. 3 is a more detailed block diagram showing the circuit configuration of the sensor unit 10 shown in FIG. FIG. 4 is a more detailed block diagram showing the circuit configuration of the arithmetic control unit 20 shown in FIG.
　無線センサシステム１は、高周波の無線信号とその反射信号とを用いて対象物の動きを検知するシステムであり、睡眠中の人の呼吸や心拍数や睡眠中の動作等を監視するためのシステム等に利用される。無線センサシステム１用の無線信号としては、所定の周波数帯域の高周波信号が使用される。 The wireless sensor system 1 is a system that detects the movement of an object using a high-frequency wireless signal and its reflected signal, and is a system for monitoring the breathing, heart rate, and sleeping operation of a sleeping person. Used for etc. As the wireless signal for the wireless sensor system 1, a high-frequency signal in a predetermined frequency band is used.
　無線センサシステム１は、図１に示すように、センサ部１０と演算制御部２０とを備えている。センサ部１０と演算制御部２０とは、互いに分離して配置される。 The wireless sensor system 1 includes a sensor unit 10 and an arithmetic control unit 20 as shown in FIG. The sensor unit 10 and the calculation control unit 20 are arranged separately from each other.
　センサ部１０は、検知用の高周波信号である検知信号を対象物３０に無線送信すると共に、対象物からの検知信号の反射信号を無線受信している。そして、センサ部１０は、検知信号とその反射信号との混合信号に基づいて対象物３０の動きを検知し、対象物３０の動きに関する検知データを生成している。センサ部１０と演算制御部２０とは無線通信が可能であり、生成した検知データは検知信号に変換され、センサ部１０と演算制御部２０との無線通信を利用してセンサ部１０から演算制御部２０に伝達される。 The sensor unit 10 wirelessly transmits a detection signal, which is a high-frequency signal for detection, to the object 30 and wirelessly receives a reflection signal of the detection signal from the object. And the sensor part 10 detects the motion of the target object 30 based on the mixed signal of a detection signal and its reflected signal, and has produced | generated the detection data regarding the motion of the target object 30. FIG. The sensor unit 10 and the calculation control unit 20 can perform wireless communication, and the generated detection data is converted into a detection signal, and calculation control is performed from the sensor unit 10 using wireless communication between the sensor unit 10 and the calculation control unit 20. Is transmitted to the unit 20.
　演算制御部２０は、センサ部１０から伝達された検知データに基づいて対象物３０の動きを演算している。また、演算制御部２０は、演算結果に基づいてセンサ部１０の制御の要否を判断し、制御が必要と判断した場合には、センサ部１０の制御に関する制御情報を生成している。生成した制御情報は、センサ部１０と演算制御部２０との無線通信を利用して演算制御部２０からセンサ部１０に伝達される。そして、演算制御部２０は、センサ部１０に伝達される制御情報を用いてセンサ部１０を制御している。 The calculation control unit 20 calculates the movement of the object 30 based on the detection data transmitted from the sensor unit 10. The calculation control unit 20 determines whether or not the sensor unit 10 needs to be controlled based on the calculation result. If the calculation control unit 20 determines that control is necessary, the calculation control unit 20 generates control information related to the control of the sensor unit 10. The generated control information is transmitted from the calculation control unit 20 to the sensor unit 10 using wireless communication between the sensor unit 10 and the calculation control unit 20. The arithmetic control unit 20 controls the sensor unit 10 using control information transmitted to the sensor unit 10.
　次に、センサ部１０の構成について説明する。図２（ａ）に示すように、センサ部１０は、第１信号発生部１１と第１送信部１２と第１受信部１３と第１検波部１４と第２検波部１５と第１制御部１６とを有している。 Next, the configuration of the sensor unit 10 will be described. As shown in FIG. 2A, the sensor unit 10 includes a first signal generation unit 11, a first transmission unit 12, a first reception unit 13, a first detection unit 14, a second detection unit 15, and a first control unit. 16.
　第１信号発生部１１は、図３に示すように、局部発振器１１ａとミキサ１１ｂとバンドパスフィルタ１１ｃとを有している。そして、第１信号発生部１１は、検知信号を生成している。局部発振器１１ａは、検知信号となる高周波信号を発生させている。ミキサ１１ｂは、局部発振器１１ａの出力信号と第１制御部１６が生成した電気信号とを混合している。バンドパスフィルタ１１ｃは、ミキサ１１ｂの出力信号のノイズ成分を除去している。バンドパスフィルタ１１ｃの出力信号が検知信号となる。第１信号発生部１１が生成した検知信号は、第１送信部１２に伝送される。検知信号の一部は、第１検波部１４にも伝送される。 As shown in FIG. 3, the first signal generation unit 11 includes a local oscillator 11a, a mixer 11b, and a band pass filter 11c. The first signal generator 11 generates a detection signal. The local oscillator 11a generates a high frequency signal that becomes a detection signal. The mixer 11b mixes the output signal of the local oscillator 11a and the electric signal generated by the first control unit 16. The band pass filter 11c removes noise components from the output signal of the mixer 11b. The output signal of the band pass filter 11c becomes a detection signal. The detection signal generated by the first signal generator 11 is transmitted to the first transmitter 12. A part of the detection signal is also transmitted to the first detector 14.
　局部発振器１１ａの発振周波数は変化させることができ、検知信号の周波数を変化させる周波数可変手段となっている。局部発振器１１ａの発振周波数は、第１制御部１６が制御している。また、局部発振器１１ａの出力信号と第１制御部１６が生成した電気信号とを混合することによって、検知信号に変調を加えることが可能である。検知信号への変調は、第１制御部１６が行っている。 The oscillation frequency of the local oscillator 11a can be changed, which is a frequency variable means for changing the frequency of the detection signal. The first control unit 16 controls the oscillation frequency of the local oscillator 11a. Further, the detection signal can be modulated by mixing the output signal of the local oscillator 11a and the electric signal generated by the first control unit 16. The first control unit 16 performs modulation on the detection signal.
　第１送信部１２は、図３に示すように、送信アンテナ１２ａとバンドパスフィルタ１２ｂと送信アンプ１２ｃと移相器１２ｄとを有している。そして、第１送信部１２は、送信アンテナ１２ａを通して検知信号を無線送信している。バンドパスフィルタ１２ｂは、検知信号のノイズ成分を除去している。送信アンプ１２ｃは、検知信号の信号強度が所定の値となるように検知信号を増幅している。移相器１２ｄは、検知信号の位相をシフトさせている。 As shown in FIG. 3, the first transmission unit 12 includes a transmission antenna 12a, a bandpass filter 12b, a transmission amplifier 12c, and a phase shifter 12d. The first transmitter 12 wirelessly transmits a detection signal through the transmission antenna 12a. The band pass filter 12b removes a noise component of the detection signal. The transmission amplifier 12c amplifies the detection signal so that the signal intensity of the detection signal becomes a predetermined value. The phase shifter 12d shifts the phase of the detection signal.
　移相器１２ｄの位相シフト量は変化させることができ、検知信号の位相を変化させる第１位相可変手段となっている。移相器１２ｄの位相シフト量は、第１制御部１６が制御している。また、送信アンプ１２ｃの利得は変化させることができ、検知信号の信号強度を変化させる信号強度可変手段となっている。送信アンプ１２ｃの利得は、第１制御部１６が制御している。 The phase shift amount of the phase shifter 12d can be changed, and is a first phase variable means for changing the phase of the detection signal. The first control unit 16 controls the phase shift amount of the phase shifter 12d. Further, the gain of the transmission amplifier 12c can be changed, and it is a signal strength variable means for changing the signal strength of the detection signal. The gain of the transmission amplifier 12c is controlled by the first control unit 16.
　第１受信部１３は、図３に示すように、受信アンテナ１３ａとバンドパスフィルタ１３ｂと受信アンプ１３ｃと移相器１３ｄと切替えスイッチ１３ｅとを有している。そして、第１受信部１３は、対象物３０からの検知信号の反射信号と制御用の高周波信号である制御信号とを受信アンテナ１３ａを通して無線受信している。制御信号は、センサ部１０の制御に関する制御情報を変調成分として含んでいる。バンドパスフィルタ１３ｂは、無線受信した反射信号と制御信号とのノイズ成分を除去している。受信アンプ１３ｃは、無線受信した反射信号と制御信号とを、所定の受信感度が得られるように増幅している。移相器１３ｄは、反射信号の位相をシフトさせている。切替えスイッチ１３ｅは、無線受信した反射信号と制御信号との伝送方向を切替えている。 As shown in FIG. 3, the first reception unit 13 includes a reception antenna 13a, a bandpass filter 13b, a reception amplifier 13c, a phase shifter 13d, and a changeover switch 13e. The first receiving unit 13 wirelessly receives the reflected signal of the detection signal from the object 30 and the control signal that is a high-frequency signal for control through the receiving antenna 13a. The control signal includes control information related to the control of the sensor unit 10 as a modulation component. The bandpass filter 13b removes noise components from the reflected signal and control signal received wirelessly. The reception amplifier 13c amplifies the reflected signal and the control signal received wirelessly so as to obtain a predetermined reception sensitivity. The phase shifter 13d shifts the phase of the reflected signal. The changeover switch 13e switches the transmission direction of the reflected signal and the control signal received wirelessly.
　移相器１３ｄの位相シフト量は変化させることができ、反射信号の位相を変化させる第２位相可変手段となっている。移相器１３ｄの位相シフト量は、第１制御部１６が制御している。切替えスイッチ１３ｅの伝送方向の切替えは、反射信号が第１検波部１４に伝送され、制御信号が第２検波部１５に伝送されるように、第１制御部１６が制御している。 The phase shift amount of the phase shifter 13d can be changed, which is a second phase variable means for changing the phase of the reflected signal. The first control unit 16 controls the phase shift amount of the phase shifter 13d. The change of the transmission direction of the changeover switch 13e is controlled by the first controller 16 so that the reflected signal is transmitted to the first detector 14 and the control signal is transmitted to the second detector 15.
　第１検波部１４は、図３に示すように、ミキサ１４ａとローパスフィルタ１４ｂとを有している。そして、第１検波部１４は、第１信号発生部１１が生成した検知信号と、第１受信部１３が無線受信した反射信号との混合信号に基づいて検知データを生成している。ミキサ１４ａは、検知信号と反射信号とを混合している。ローパスフィルタ１４ｂは、ミキサ１４ａの出力信号のノイズ成分を除去している。ローパスフィルタ１４ｂの出力信号は、図示しないＡ／Ｄ変換回路等を介して検知データに変換される。第１検波部１４が検出した検知データは、第１制御部１６に伝達される。 The 1st detection part 14 has the mixer 14a and the low-pass filter 14b, as shown in FIG. The first detector 14 generates detection data based on a mixed signal of the detection signal generated by the first signal generator 11 and the reflected signal wirelessly received by the first receiver 13. The mixer 14a mixes the detection signal and the reflected signal. The low pass filter 14b removes a noise component of the output signal of the mixer 14a. The output signal of the low-pass filter 14b is converted into detection data via an A / D conversion circuit (not shown). Detection data detected by the first detection unit 14 is transmitted to the first control unit 16.
　第２検波部１５は、図３に示すように、局部発振器１５ａとミキサ１５ｂとローパスフィルタ１５ｃとを有している。そして、第２検波部１５は、第１受信部１３が無線受信した制御信号から制御情報を検出している。局部発振器１５ａは、検波用の高周波信号を発生させている。ミキサ１５ｂは、制御信号を局部発振器１５ａの出力信号と混合している。ローパスフィルタ１５ｃは、ミキサ１５ｂの出力信号のノイズ成分を除去している。ローパスフィルタ１５ｃの出力信号は、図示しないＡ／Ｄ変換回路等を介して制御情報に変換される。第２検波部１５が検出した制御情報は、第１制御部１６に伝達される。 As shown in FIG. 3, the second detector 15 has a local oscillator 15a, a mixer 15b, and a low-pass filter 15c. Then, the second detector 15 detects control information from the control signal wirelessly received by the first receiver 13. The local oscillator 15a generates a high-frequency signal for detection. The mixer 15b mixes the control signal with the output signal of the local oscillator 15a. The low pass filter 15c removes a noise component of the output signal of the mixer 15b. The output signal of the low-pass filter 15c is converted into control information via an A / D conversion circuit (not shown). The control information detected by the second detector 15 is transmitted to the first controller 16.
　第１制御部１６としては、制御用のＬＳＩ等が使用される。第１制御部１６は、第１検波部１４が生成した検知データに基づいて変調用の電気信号を生成し、生成した電気信号を用いて検知信号に変調を加えている。その結果、検知信号は、検知データを変調成分として含む信号となる。 As the first control unit 16, a control LSI or the like is used. The first controller 16 generates an electrical signal for modulation based on the detection data generated by the first detector 14, and modulates the detection signal using the generated electrical signal. As a result, the detection signal is a signal including detection data as a modulation component.
　また、第１制御部１６は、第２検波部１５が検出した制御情報に基づいてセンサ部１０の制御を実行している。第１制御部１６が制御するセンサ部１０の機能は、局部発振器１１ａの発振周波数や、送信アンプ１２ｃの利得や、移相器１２ｄの位相シフト量や、移相器１３ｄの位相シフト量等である。 Further, the first control unit 16 executes control of the sensor unit 10 based on the control information detected by the second detection unit 15. The function of the sensor unit 10 controlled by the first control unit 16 is based on the oscillation frequency of the local oscillator 11a, the gain of the transmission amplifier 12c, the phase shift amount of the phase shifter 12d, the phase shift amount of the phase shifter 13d, and the like. is there.
　次に、演算制御部２０の構成について説明する。図２に示すように、演算制御部２０は、第２信号発生部２１と第２送信部２２と第２受信部２３と第３検波部２４と演算部２５と第２制御部２６とを有している。 Next, the configuration of the arithmetic control unit 20 will be described. As shown in FIG. 2, the calculation control unit 20 includes a second signal generation unit 21, a second transmission unit 22, a second reception unit 23, a third detection unit 24, a calculation unit 25, and a second control unit 26. is doing.
　第２信号発生部２１は、図４に示すように、局部発振器２１ａとミキサ２１ｂとバンドパスフィルタ２１ｃとを有している。そして、第２信号発生部２１は、制御信号を生成している。局部発振器２１ａは、制御信号となる高周波信号を発生させている。ミキサ２１ｂは、局部発振器２１ａの出力信号と第２制御部２６が生成した電気信号とを混合している。バンドパスフィルタ２１ｃは、ミキサ１５ｂの出力信号のノイズ成分を除去している。バンドパスフィルタ２１ｃの出力信号が制御信号となる。第２信号発生部２１が生成した制御信号は、第２送信部２２に伝送される。 As shown in FIG. 4, the second signal generator 21 includes a local oscillator 21a, a mixer 21b, and a band-pass filter 21c. The second signal generator 21 generates a control signal. The local oscillator 21a generates a high frequency signal that becomes a control signal. The mixer 21b mixes the output signal of the local oscillator 21a and the electric signal generated by the second control unit 26. The bandpass filter 21c removes noise components from the output signal of the mixer 15b. The output signal of the band pass filter 21c becomes a control signal. The control signal generated by the second signal generator 21 is transmitted to the second transmitter 22.
　第２制御部２６は、局部発振器２１ａの出力信号と第２制御部２６が生成した電気信号とを混合することによって、制御信号に変調を加えること可能である。制御信号への変調は、第２制御部２６が行っている。 The second control unit 26 can modulate the control signal by mixing the output signal of the local oscillator 21a and the electric signal generated by the second control unit 26. The second control unit 26 performs modulation to the control signal.
　第２送信部２２は、図４に示すように、送信アンテナ２２ａとバンドパスフィルタ２２ｂと送信アンプ２２ｃとを有している。そして、第２送信部２２は、第２信号発生部２１が生成した制御信号を、送信アンテナ２２ａを通して無線送信している。バンドパスフィルタ２２ｂは、制御信号のノイズ成分を除去している。送信アンプ２２ｃは、制御信号の信号強度が所定の値となるように制御信号を増幅している。 As shown in FIG. 4, the second transmission unit 22 includes a transmission antenna 22a, a bandpass filter 22b, and a transmission amplifier 22c. The second transmitter 22 wirelessly transmits the control signal generated by the second signal generator 21 through the transmission antenna 22a. The band pass filter 22b removes the noise component of the control signal. The transmission amplifier 22c amplifies the control signal so that the signal strength of the control signal becomes a predetermined value.
　第２受信部２３は、図４に示すように、受信アンテナ２３ａとバンドパスフィルタ２３ｂと受信アンプ２３ｃとを有している。そして、第２受信部２３は、センサ部１０からの検知信号を、受信アンテナ２３ａを通して無線受信している。バンドパスフィルタ２３ｂは、無線受信した検知信号のノイズ成分を除去している。受信アンプ２３ｃは、所定の受信感度が得られるように検知信号を増幅している。第２受信部２３が無線受信した検知信号は、第３検波部２４に伝送される。 As shown in FIG. 4, the second receiving unit 23 includes a receiving antenna 23a, a bandpass filter 23b, and a receiving amplifier 23c. The second receiving unit 23 wirelessly receives the detection signal from the sensor unit 10 through the receiving antenna 23a. The band pass filter 23b removes a noise component of the detection signal received wirelessly. The reception amplifier 23c amplifies the detection signal so as to obtain a predetermined reception sensitivity. The detection signal wirelessly received by the second reception unit 23 is transmitted to the third detection unit 24.
　第３検波部２４は、図４に示すように、局部発振器２４ａとミキサ２４ｂとローパスフィルタ２４ｃとを有している。そして、第３検波部２４は、第２受信部２３が無線受信した検知信号の変調成分から検知データを検出している。局部発振器２４ａは、検波用の高周波信号を発生させている。ミキサ２４ｂは、第２受信部２３が無線受信した検知信号を局部発振器２４ａの出力信号と混合している。ローパスフィルタ２４ｃは、ミキサ２４ｂの出力信号のノイズ成分を除去している。ローパスフィルタ２４ｃの出力信号は、図示しないＡ／Ｄ変換回路等を介して検知データに変換される。第３検波部２４が検出した検知データは、演算部２５に伝達される。 The 3rd detection part 24 has the local oscillator 24a, the mixer 24b, and the low-pass filter 24c, as shown in FIG. And the 3rd detection part 24 has detected detection data from the modulation | alteration component of the detection signal which the 2nd receiving part 23 received wirelessly. The local oscillator 24a generates a high-frequency signal for detection. The mixer 24b mixes the detection signal wirelessly received by the second receiver 23 with the output signal of the local oscillator 24a. The low pass filter 24c removes noise components from the output signal of the mixer 24b. The output signal of the low-pass filter 24c is converted into detection data via an A / D conversion circuit (not shown). Detection data detected by the third detection unit 24 is transmitted to the calculation unit 25.
　演算部２５としては、演算用のＬＳＩ等が使用される。演算部２５は、第３検波部２４が検出した検知データに基づいて対象物３０の動きを演算している。演算部２５が演算した対象物３０の動きに関する情報は、第２制御部２６に伝達される。 As the calculation unit 25, a calculation LSI or the like is used. The calculation unit 25 calculates the movement of the object 30 based on the detection data detected by the third detection unit 24. Information regarding the movement of the object 30 calculated by the calculation unit 25 is transmitted to the second control unit 26.
　第２制御部２６としては、制御用のＬＳＩ等が使用される。第２制御部２６は、演算部２５の演算結果に基づいて、センサ部１０の制御の要否を判断している。そして、第２制御部２６は、センサ部１０の制御が必要と判断した場合に、センサ部１０を制御するための制御情報を生成している。そして、第２制御部２６は、制御情報に基づいて変調用の電気信号を生成し、生成した電気信号を用いて制御信号に変調を加えている。その結果、制御信号は、制御情報を変調成分として含む信号となる。 As the second control unit 26, a control LSI or the like is used. The second control unit 26 determines whether or not the sensor unit 10 needs to be controlled based on the calculation result of the calculation unit 25. The second control unit 26 generates control information for controlling the sensor unit 10 when determining that the control of the sensor unit 10 is necessary. Then, the second control unit 26 generates an electrical signal for modulation based on the control information, and modulates the control signal using the generated electrical signal. As a result, the control signal is a signal including control information as a modulation component.
　次に、検知信号と制御信号との送信タイミングについて、図５を用いて説明する。図５は、本発明の実施形態に係る検知信号と制御信号との送信タイミングを示す説明図である。図５（ａ）は、センサ部１０が無線送信する検知信号の送信タイミングを示す説明図であり、図５（ｂ）は、演算制御部２０が無線送信する制御信号の送信タイミングを示す説明図である。図５において、横軸は時間である。 Next, the transmission timing of the detection signal and the control signal will be described with reference to FIG. FIG. 5 is an explanatory diagram illustrating transmission timings of the detection signal and the control signal according to the embodiment of the present invention. FIG. 5A is an explanatory diagram illustrating the transmission timing of the detection signal that is wirelessly transmitted by the sensor unit 10, and FIG. 5B is an explanatory diagram that illustrates the transmission timing of the control signal that is wirelessly transmitted by the arithmetic control unit 20. It is. In FIG. 5, the horizontal axis is time.
　図５に示すように、無線センサシステム１では、センサ部１０と演算制御部２０とは、第１時間帯ｔ１と第２時間帯ｔ２とに時間を分割して動作している。 As shown in FIG. 5, in the wireless sensor system 1, the sensor unit 10 and the calculation control unit 20 operate by dividing time into a first time zone t1 and a second time zone t2.
　第１時間帯ｔ１では、センサ部１０の第１送信部１２が検知信号を無線送信している。検知信号の無線送信は、対象物３０の動きを検知する（検知の実施）ために行われる。それと同時に、検知信号の無線送信は、検知で得られた検知データを演算制御部２０に伝達する（検知データの伝達）ためにも行われる。検知信号の無線送信に対応して、演算制御部２０では、第２受信部２３が検知信号を無線受信し、第３検波部２４が、無線受信した検知信号から検知データを検出している。そして、演算部２５が、検出した検知データに基づいて対象物３０の動きを演算し、第２制御部２６が、演算部２５の演算結果に基づいて、制御情報を生成している。 In the first time zone t1, the first transmission unit 12 of the sensor unit 10 wirelessly transmits a detection signal. The wireless transmission of the detection signal is performed to detect the movement of the object 30 (execution of detection). At the same time, the wireless transmission of the detection signal is also performed to transmit the detection data obtained by the detection to the arithmetic control unit 20 (transmission of the detection data). Corresponding to the wireless transmission of the detection signal, in the calculation control unit 20, the second reception unit 23 wirelessly receives the detection signal, and the third detection unit 24 detects detection data from the wirelessly received detection signal. Then, the calculation unit 25 calculates the movement of the object 30 based on the detected detection data, and the second control unit 26 generates control information based on the calculation result of the calculation unit 25.
　第２時間帯ｔ２では、演算制御部２０の第２送信部２２が制御信号を無線送信している。制御信号の無線送信は、センサ部１０の制御に関する制御情報をセンサ部１０に伝達する（制御情報の伝達）ために行われる。制御信号の無線送信に対応して、センサ部１０では、第１受信部１３が制御信号を無線受信し、第２検波部１５が、無線受信した制御信号から制御情報を検出している。そして、第１制御部１６が、検出した制御情報に基づいてセンサ部１０の制御を実行している。 In the second time zone t2, the second transmission unit 22 of the calculation control unit 20 wirelessly transmits a control signal. The wireless transmission of the control signal is performed to transmit control information related to the control of the sensor unit 10 to the sensor unit 10 (transmission of control information). In response to the wireless transmission of the control signal, in the sensor unit 10, the first receiving unit 13 wirelessly receives the control signal, and the second detection unit 15 detects the control information from the wirelessly received control signal. And the 1st control part 16 is performing control of sensor part 10 based on detected control information.
　このように、本実施形態では、第１時間帯ｔ１において、センサ部１０での検知の実施と、センサ部１０から演算制御部２０への検知データの伝達と、が同時に行われる。そして、演算制御部２０では、検知データの伝達に対応して制御情報が生成される。その後、第２時間帯ｔ２において、演算制御部２０からセンサ部１０への制御情報の伝達が行われ、伝達された制御情報に基づいてセンサ部１０の制御が実行される。尚、このような第１時間帯ｔ１でのセンサ部１０と演算制御部２０との動作と、第２時間帯ｔ２でのセンサ部１０と演算制御部２０との動作と、は繰り返して行われる。 As described above, in the present embodiment, detection by the sensor unit 10 and transmission of detection data from the sensor unit 10 to the arithmetic control unit 20 are performed simultaneously in the first time period t1. And in the arithmetic control part 20, control information is produced | generated corresponding to transmission of detection data. Thereafter, in the second time zone t2, control information is transmitted from the arithmetic control unit 20 to the sensor unit 10, and control of the sensor unit 10 is executed based on the transmitted control information. The operations of the sensor unit 10 and the calculation control unit 20 in the first time zone t1 and the operations of the sensor unit 10 and the calculation control unit 20 in the second time zone t2 are repeatedly performed. .
　次に、本発明の実施形態に係る検知の手順について、図６を用いて説明する。図６は、本発明の実施形態に係る検知の手順を示すフローチャートである。図６において、ステップＳａ１からステップＳａ７はセンサ部１０の動作手順を示すステップである。ステップＳｂ１からステップＳｂ７は演算制御部２０の動作手順を示すステップである。 Next, the detection procedure according to the embodiment of the present invention will be described with reference to FIG. FIG. 6 is a flowchart showing a detection procedure according to the embodiment of the present invention. In FIG. 6, steps Sa <b> 1 to Sa <b> 7 are steps showing the operation procedure of the sensor unit 10. Steps Sb1 to Sb7 are steps showing an operation procedure of the arithmetic control unit 20.
　図６に示すように、センサ部１０では、まず、検知データが初期化される（ステップＳａ１）。次に、第１送信部１２が検知信号を無線送信し、第１受信部１３がその反射信号を無線受信し、そして、第１検波部１４が検知信号とその反射信号とに基づいて検知データを生成する（ステップＳａ２）。ステップＳ２において無線送信された検知信号には、検知データが変調成分として含まれている。 As shown in FIG. 6, in the sensor unit 10, first, detection data is initialized (step Sa1). Next, the first transmission unit 12 wirelessly transmits the detection signal, the first reception unit 13 wirelessly receives the reflection signal, and the first detection unit 14 detects detection data based on the detection signal and the reflection signal. Is generated (step Sa2). The detection signal wirelessly transmitted in step S2 includes detection data as a modulation component.
　演算制御部２０では、まず、第２受信部２３がセンサ部１０からの検知データを待受ける（ステップＳｂ１）。そして、ステップＳａ２に対応して、第２受信部２３が検知信号を無線受信する（ステップＳｂ２）。次に、第３検波部２４が検知信号から検知データを検出する（ステップＳｂ３）。次に、演算部２５が検知データを用いて対象物３０の動きを演算する（ステップＳｂ４）。次に、第２制御部２６が演算部２５の演算結果に基づいてセンサ部１０の制御が必要か否か（要否）を判断する（ステップＳｂ５）。 In the arithmetic control unit 20, first, the second receiving unit 23 waits for detection data from the sensor unit 10 (step Sb1). Then, corresponding to step Sa2, the second receiving unit 23 wirelessly receives the detection signal (step Sb2). Next, the third detector 24 detects detection data from the detection signal (step Sb3). Next, the calculating part 25 calculates the motion of the target object 30 using detection data (step Sb4). Next, the second control unit 26 determines whether or not the sensor unit 10 needs to be controlled (necessity) based on the calculation result of the calculation unit 25 (step Sb5).
　ステップＳｂ５において、センサ部１０の制御が不要と判断した場合、ステップＳｂ１に戻り、ステップＳｂ１からステップＳｂ５までの手順を繰り返す。ステップＳｂ５において、センサ部１０の制御が必要と判断した場合、第２制御部２６が所定の制御情報を生成する（ステップＳｂ６）。そして、第２送信部２２が生成した制御情報を含む制御信号をセンサ部１０に無線送信する（ステップＳｂ７）。 If it is determined in step Sb5 that the control of the sensor unit 10 is unnecessary, the process returns to step Sb1, and the procedure from step Sb1 to step Sb5 is repeated. In step Sb5, when it is determined that the control of the sensor unit 10 is necessary, the second control unit 26 generates predetermined control information (step Sb6). And the control signal containing the control information which the 2nd transmission part 22 generated is wirelessly transmitted to sensor part 10 (Step Sb7).
　ステップＳｂ７に対応して、センサ部１０では、第１受信部１３が演算制御部２０からの制御情報を待受ける（ステップＳａ３）。そして、第１制御部１６が演算制御部２０からの制御信号の無線受信の有無に基づく判断を行う（ステップＳａ４）。ステップＳａ４において、制御信号の無線受信が無かった場合、ステップＳａ１に戻り、ステップＳａ１からステップＳａ４までの手順を繰り返す。ステップＳａ４において、制御信号の無線受信が有った場合、制御信号が自分宛の信号か否かに基づく判断を第１制御部１６が行う（ステップＳａ５）。 Corresponding to step Sb7, in the sensor unit 10, the first receiving unit 13 waits for control information from the calculation control unit 20 (step Sa3). Then, the first control unit 16 makes a determination based on the presence / absence of wireless reception of the control signal from the arithmetic control unit 20 (step Sa4). If there is no wireless reception of the control signal in step Sa4, the process returns to step Sa1, and the procedure from step Sa1 to step Sa4 is repeated. In step Sa4, when the control signal is received wirelessly, the first control unit 16 makes a determination based on whether the control signal is a signal addressed to itself (step Sa5).
　ステップＳａ５において、制御信号が自分宛の信号ではなかった場合、ステップＳａ１に戻り、ステップＳａ１からステップＳａ５までの手順を繰り返す。ステップＳａ５において、制御信号が自分宛の信号であった場合、第２検波部１５が制御信号から制御情報を検出する（ステップＳａ６）。そして、検出した制御情報に基づいて第１制御部１６がセンサ部１０の制御を実行する（ステップＳａ７）。その後、ステップＳａ１に戻り、ステップＳａ１からステップＳａ７までの手順を繰り返す。 In step Sa5, when the control signal is not a signal addressed to itself, the process returns to step Sa1, and the procedure from step Sa1 to step Sa5 is repeated. In step Sa5, when the control signal is a signal addressed to itself, the second detector 15 detects control information from the control signal (step Sa6). And the 1st control part 16 performs control of sensor part 10 based on detected control information (Step Sa7). Then, it returns to step Sa1 and repeats the procedure from step Sa1 to step Sa7.
　無線センサシステム１では、このようにして、センサ部１０と演算制御部２０との間の無線通信を利用して、検知データと制御情報との伝達を行っている。そして、センサ部１０から演算制御部２０に伝達された検知データを用いて、演算制御部２０が対象物３０の動きを演算している。また、演算制御部２０からセンサ部１０に伝達された制御情報を用いて、演算制御部２０がセンサ部１０を制御している。制御情報を用いて第２制御部２６が制御するセンサ部１０の機能は、局部発振器１１ａの発振周波数や、送信アンプ１２ｃの利得や、移相器１２ｄの位相シフト量や、移相器１３ｄの位相シフト量等である。 In the wireless sensor system 1, the detection data and the control information are transmitted using the wireless communication between the sensor unit 10 and the calculation control unit 20 in this way. And the calculation control part 20 is calculating the motion of the target object 30 using the detection data transmitted to the calculation control part 20 from the sensor part 10. FIG. Further, the calculation control unit 20 controls the sensor unit 10 using the control information transmitted from the calculation control unit 20 to the sensor unit 10. The functions of the sensor unit 10 controlled by the second control unit 26 using the control information include the oscillation frequency of the local oscillator 11a, the gain of the transmission amplifier 12c, the phase shift amount of the phase shifter 12d, and the phase shifter 13d. The amount of phase shift.
　次に、本実施形態の効果について説明する。本実施形態の無線センサシステム１では、センサ部１０（センサ装置）は、検知信号を無線送信する第１送信部１２と、反射信号と制御信号とを無線受信する第１受信部１３と、を有している。また、演算制御部２０は、制御信号を無線送信する第２送信部２２と、検知信号を無線受信する第２受信部２３と、を有している。そのため、センサ部１０と演算制御部２０との間で無線通信が可能であり、センサ部１０と演算制御部２０との間の無線通信を利用して、検知データと制御信号との伝達を行うことができる。 Next, the effect of this embodiment will be described. In the wireless sensor system 1 of the present embodiment, the sensor unit 10 (sensor device) includes a first transmission unit 12 that wirelessly transmits a detection signal, and a first reception unit 13 that wirelessly receives a reflection signal and a control signal. Have. The arithmetic control unit 20 includes a second transmission unit 22 that wirelessly transmits a control signal and a second reception unit 23 that wirelessly receives a detection signal. Therefore, wireless communication is possible between the sensor unit 10 and the calculation control unit 20, and the detection data and the control signal are transmitted using the wireless communication between the sensor unit 10 and the calculation control unit 20. be able to.
　そして、演算制御部２０の第２制御部２６が制御情報を生成し、センサ部１０の第１制御部１６が制御情報に基づいてセンサ部１０の制御を実行することによって、センサ部１０の制御を行うための複雑な信号処理を演算制御部２０側で行うことができる。また、演算制御部２０の演算部２５がセンサ部１０から伝達された検知データを用いて対象物３０の動きを演算することによって、対象物３０の動きを演算するための複雑な信号処理を演算制御部２０側で行うことができる。その結果、センサ部１０では、対象物３０の動きを演算したりセンサ部１０自身の制御を行ったりするための複雑な信号処理を行わなくても良くなる。そして、それによってセンサ部１０の消費電力を抑制することができる。しかも、検知信号の変調成分として検知データの伝達を行うので、第１送信部１２の回路構成を簡単にできる。 Then, the second control unit 26 of the arithmetic control unit 20 generates control information, and the first control unit 16 of the sensor unit 10 executes control of the sensor unit 10 based on the control information, thereby controlling the sensor unit 10. Complicated signal processing for performing the processing can be performed on the arithmetic control unit 20 side. Further, the calculation unit 25 of the calculation control unit 20 calculates the movement of the object 30 using the detection data transmitted from the sensor unit 10, thereby calculating complex signal processing for calculating the movement of the object 30. This can be done on the control unit 20 side. As a result, the sensor unit 10 does not need to perform complicated signal processing for calculating the movement of the object 30 or controlling the sensor unit 10 itself. And thereby, the power consumption of the sensor unit 10 can be suppressed. In addition, since the detection data is transmitted as the modulation component of the detection signal, the circuit configuration of the first transmission unit 12 can be simplified.
また、本実施形態の無線センサシステム１では、センサ部１０と演算制御部２０とが、第１送信部１２が検知信号を無線送信する第１時間帯ｔ１と、第２送信部２２が制御信号を無線送信する第２時間帯ｔ２と、に時間を分割して動作することによって、検知信号と制御信号との干渉を抑制することができる。その結果、センサ部１０と演算制御部２０との間の無線通信を安定させることができる。 Further, in the wireless sensor system 1 of the present embodiment, the sensor unit 10 and the calculation control unit 20 are the first time zone t1 in which the first transmission unit 12 wirelessly transmits the detection signal, and the second transmission unit 22 is the control signal. By operating by dividing the time into the second time zone t2 for wirelessly transmitting the signal, interference between the detection signal and the control signal can be suppressed. As a result, wireless communication between the sensor unit 10 and the calculation control unit 20 can be stabilized.
　また、本実施形態の無線センサシステム１において、検知信号と同じかそれに近い周波数の他の無線信号が使用されるような環境では、他の無線信号が検知信号に干渉してセンサ部１０の検知感度を低下させる可能性が有った。しかしながら、本実施形態の無線センサシステム１では、センサ部１０は、検知信号の周波数を変化させる周波数可変手段（第１信号発生部１１）と、検知信号の信号強度を変化させる信号強度可変手段（送信アンプ１２ｃ）と、を有している。そのため、検知信号と同じかそれに近い周波数の他の無線信号が使用されている場合に、周波数可変手段が検知信号の周波数を変化させることによって、他の無線信号による干渉を抑制することができる。また、信号強度可変手段が検知信号の信号強度を増大（変化）させることによっても、他の無線信号による干渉を抑制することができる。その結果、センサ部の検知感度を安定させることができる。尚、周波数可変手段と信号強度可変手段とのうち、少なくとも一方を有していれば、このような効果を得ることができる。 Further, in the wireless sensor system 1 of the present embodiment, in an environment where another wireless signal having the same frequency as that of the detection signal or a frequency close thereto is used, the other wireless signal interferes with the detection signal and the sensor unit 10 detects the signal. There was a possibility of lowering the sensitivity. However, in the wireless sensor system 1 of the present embodiment, the sensor unit 10 includes a frequency variable unit (first signal generation unit 11) that changes the frequency of the detection signal, and a signal strength variable unit that changes the signal intensity of the detection signal (first signal generation unit 11). A transmission amplifier 12c). Therefore, when another radio signal having the same frequency as that of the detection signal or a frequency close thereto is used, the frequency variable means can change the frequency of the detection signal, thereby suppressing interference due to the other radio signal. Moreover, interference by other radio signals can also be suppressed by the signal intensity varying means increasing (changing) the signal intensity of the detection signal. As a result, the detection sensitivity of the sensor unit can be stabilized. Such an effect can be obtained if at least one of the frequency variable means and the signal intensity variable means is provided.
　また、本実施形態の無線センサシステム１において、センサ部１０と対象物３０との距離が変化するような環境で使用する場合、第１検波部１４に入力される検知信号の位相と反射信号の位相とのずれによって、センサ部１０の検知感度が低下する可能性が有った。しかしながら、この構成の無線センサシステム１では、センサ部１０は、検知信号の位相を変化させる第１位相可変手段（移相器１２ｄ）と、反射信号の位相を変化させる第２位相可変手段（移相器１３ｄ）と、を有している。そのため、センサ部と対象物との距離が変化した場合でも、第１位相可変手段が検知信号の位相を変化させることによって、検知感度を最適化することができる。また、第２位相可変手段が反射信号の位相を変化させることによっても、検知感度を最適化することができる。その結果、センサ部の検知感度を安定させることができる。尚、第１位相可変手段と第２位相可変手段とのうち、少なくとも一方を有していれば、このような効果を得ることができる。 Further, in the wireless sensor system 1 of the present embodiment, when used in an environment where the distance between the sensor unit 10 and the object 30 changes, the phase of the detection signal and the reflection signal input to the first detection unit 14 are changed. There is a possibility that the detection sensitivity of the sensor unit 10 may be lowered due to the deviation from the phase. However, in the wireless sensor system 1 configured as described above, the sensor unit 10 includes the first phase variable means (phase shifter 12d) that changes the phase of the detection signal and the second phase variable means (shift that changes the phase of the reflected signal). Phaser 13d). Therefore, even when the distance between the sensor unit and the object changes, the detection sensitivity can be optimized by the first phase varying means changing the phase of the detection signal. The detection sensitivity can also be optimized by the second phase varying means changing the phase of the reflected signal. As a result, the detection sensitivity of the sensor unit can be stabilized. Such an effect can be obtained if at least one of the first phase variable means and the second phase variable means is provided.
　［第２実施形態］
　以下、本発明の第２実施形態について図面を参照しながら説明する。尚、本実施形態において、前述した第１実施形態と同一の構成である場合、同一符号を付して詳細な説明は省略する。 [Second Embodiment]
Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. In addition, in this embodiment, when it is the same structure as 1st Embodiment mentioned above, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.
　まず、本発明の第２実施形態に係る無線センサシステム１０１の構成について図７を用いて説明する。図７は、本発明の第２実施形態に係るセンサ部１１０の回路構成を示すブロック図である。 First, the configuration of the wireless sensor system 101 according to the second embodiment of the present invention will be described with reference to FIG. FIG. 7 is a block diagram showing a circuit configuration of the sensor unit 110 according to the second embodiment of the present invention.
　本実施形態は、第１実施形態に係る無線センサシステム１のセンサ部１０がセンサ部１１０に置き換わったものである。センサ部１１０は、図７に示すように、第１信号発生部１１と送受信部１１２と第１検波部１４と第２検波部１５と第１制御部１６とを有している。 In the present embodiment, the sensor unit 10 of the wireless sensor system 1 according to the first embodiment is replaced with a sensor unit 110. As shown in FIG. 7, the sensor unit 110 includes a first signal generation unit 11, a transmission / reception unit 112, a first detection unit 14, a second detection unit 15, and a first control unit 16.
　送受信部１１２は、送受信アンテナ１１２ａとバンドパスフィルタ１１２ｂと切替えスイッチ１１２ｃと移相器１１２ｄとを有している。センサ部１１０が無線送信する検知信号は、送受信アンテナ１１２ａを通して無線送信される。また、センサ部１１０が無線受信する反射信号と制御信号とは、送受信アンテナ１１２ａを通して無線受信される。バンドパスフィルタ１１２ｂは、センサ部１１０が送受信する信号のノイズ成分を除去している。切替えスイッチ１１２ｃは、反射信号が第１検波部１４に伝送され、制御信号が第２検波部１５に伝送されるように、送受信部１１２が無線受信した信号の伝送方向を切替えている。移相器１１２ｄは、検知信号と反射信号との位相とをシフトさせている。 The transmission / reception unit 112 includes a transmission / reception antenna 112a, a bandpass filter 112b, a changeover switch 112c, and a phase shifter 112d. The detection signal wirelessly transmitted by the sensor unit 110 is wirelessly transmitted through the transmission / reception antenna 112a. The reflected signal and the control signal received wirelessly by the sensor unit 110 are wirelessly received through the transmission / reception antenna 112a. The band pass filter 112b removes a noise component of a signal transmitted and received by the sensor unit 110. The changeover switch 112 c switches the transmission direction of the signal received wirelessly by the transmission / reception unit 112 so that the reflected signal is transmitted to the first detection unit 14 and the control signal is transmitted to the second detection unit 15. The phase shifter 112d shifts the phases of the detection signal and the reflected signal.
　このように、本実施形態の送受信部１１２が、第１実施形態のセンサ部１０の第１送信部１２の機能と第１受信部１３の機能とを併せ持った回路となっている。そして、送受信部１１２は、第１信号発生部１１が生成した検知信号を無線送信している。また、送受信部１１２は、検知信号の対象物３０からの反射信号と、演算制御部２０から無線送信された制御信号と、を無線受信している。センサ部１１０は、例えばこのような回路構成であっても構わない。そして、センサ部１１０のように送信回路と受信回路とを一体で構成することによって、センサ部１１０の回路構成を更に簡単にできる。 Thus, the transmission / reception unit 112 of the present embodiment is a circuit having both the function of the first transmission unit 12 and the function of the first reception unit 13 of the sensor unit 10 of the first embodiment. The transmission / reception unit 112 wirelessly transmits the detection signal generated by the first signal generation unit 11. Further, the transmission / reception unit 112 wirelessly receives the reflection signal of the detection signal from the object 30 and the control signal wirelessly transmitted from the arithmetic control unit 20. The sensor unit 110 may have such a circuit configuration, for example. Then, the circuit configuration of the sensor unit 110 can be further simplified by integrally configuring the transmission circuit and the reception circuit like the sensor unit 110.
　［第３実施形態］
　以下、本発明の第３実施形態について図面を参照しながら説明する。尚、本実施形態において、前述した第１実施形態と同一の構成である場合、同一符号を付して詳細な説明は省略する。 [Third Embodiment]
Hereinafter, a third embodiment of the present invention will be described with reference to the drawings. In addition, in this embodiment, when it is the same structure as 1st Embodiment mentioned above, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.
　まず、本発明の第３実施形態に係る無線センサシステム２０１の構成について図８を用いて説明する。図８は、本発明の第３実施形態に係る無線センサシステム２０１の構成を示す説明図である。 First, the configuration of the wireless sensor system 201 according to the third embodiment of the present invention will be described with reference to FIG. FIG. 8 is an explanatory diagram showing a configuration of a wireless sensor system 201 according to the third embodiment of the present invention.
　図８に示すように、無線センサシステム２０１は、２つの（複数の）センサ部１０と１つの演算制御部２０とを備えている。そして、演算制御部２０は、２つのセンサ部１０ごとに制御信号を無線送信し、それによって、２つのセンサ部１０ごとに制御情報を伝達している。センサ部１０の構成と演算制御部２０の構成とは、第１実施形態に係るセンサ部１０の構成と演算制御部２０の構成と同じである。 As shown in FIG. 8, the wireless sensor system 201 includes two (plural) sensor units 10 and one arithmetic control unit 20. The arithmetic control unit 20 wirelessly transmits a control signal for each of the two sensor units 10, thereby transmitting control information for each of the two sensor units 10. The configuration of the sensor unit 10 and the configuration of the calculation control unit 20 are the same as the configuration of the sensor unit 10 and the calculation control unit 20 according to the first embodiment.
　２つのセンサ部１０ごとに制御信号を伝達する方法としては、各種の方法が考えられるが、例えば、演算制御部２０が、どちらのセンサ部１０宛ての信号であるかを示す宛先情報を含む制御信号を無線送信することによって、２つのセンサ部１０ごとに制御信号を伝達することが可能となる。 Various methods are conceivable as a method for transmitting the control signal to each of the two sensor units 10. For example, the control including the destination information indicating which sensor unit 10 the signal is addressed to which sensor unit 10 has. By transmitting the signal wirelessly, it becomes possible to transmit a control signal for each of the two sensor units 10.
　次に、本実施形態の効果について説明する。本実施形態の無線センサシステム２０１では、演算制御部２０が２つのセンサ部１０が検出した検知データに基づいて対象物３０の動きを演算することによって、対象物３０の動きをより確実に検出することができる。また、演算制御部２０が２つのセンサ部１０ごとに制御情報を伝達することによって、センサ部１０ごとの制御が可能となり、センサ部１０の検知感度を安定させたり、センサ部１０と演算制御部２０との間の無線通信を安定させたりすることが容易となる。 Next, the effect of this embodiment will be described. In the wireless sensor system 201 of the present embodiment, the calculation control unit 20 calculates the movement of the object 30 based on the detection data detected by the two sensor units 10, thereby more reliably detecting the movement of the object 30. be able to. In addition, the calculation control unit 20 transmits control information for each of the two sensor units 10, thereby enabling control for each sensor unit 10, stabilizing the detection sensitivity of the sensor unit 10, and the sensor unit 10 and the calculation control unit. It becomes easy to stabilize the wireless communication with 20.
　以上、本発明の実施形態について説明してきたが、本発明は上記の実施形態に限定されず、本発明の目的の範囲を逸脱しない限りにおいて適宜変更することができる。 As mentioned above, although the embodiment of the present invention has been described, the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the scope of the object of the present invention.
　例えば、本発明の第１実施形態において、センサ部１０の回路構成は、図３に示す以外の回路構成であっても構わない。また、演算制御部２０の回路構成は、図４に示す以外の回路構成であっても構わない。また、本発明の第２実施形態において、センサ部１１０の回路構成は、図７に示す以外の回路構成であっても構わない。 For example, in the first embodiment of the present invention, the circuit configuration of the sensor unit 10 may be a circuit configuration other than that shown in FIG. Further, the circuit configuration of the arithmetic control unit 20 may be a circuit configuration other than that shown in FIG. In the second embodiment of the present invention, the circuit configuration of the sensor unit 110 may be a circuit configuration other than that shown in FIG.
　また、本発明の第１実施形態において、センサ部１０は、検知の実施と検知データの伝達とを同時に行うのではなく、図５に示す第１時間帯ｔ１の期間内の異なるタイミングで、検知の実施と検知データの伝達とを別々に行っても構わない。 In the first embodiment of the present invention, the sensor unit 10 does not perform the detection and transmits the detection data at the same time, but detects the detection at different timings within the period of the first time period t1 shown in FIG. The execution of and the transmission of detection data may be performed separately.
　また、本発明の第３実施形態において、無線センサシステム２０１は、更に多くのセンサ部１０を備えていても構わない。そして、演算制御部２０は、それらのセンサ部１０ごとに制御情報を伝達しても構わない。 In the third embodiment of the present invention, the wireless sensor system 201 may include more sensor units 10. The arithmetic control unit 20 may transmit control information for each of the sensor units 10.
　１　無線センサシステム
　１０　センサ部
　１１　第１信号発生部
　１１ａ　局部発振器
　１１ｂ　ミキサ
　１１ｃ　バンドパスフィルタ
　１２　第１送信部
　１２ａ　送信アンテナ
　１２ｂ　バンドパスフィルタ
　１２ｃ　送信アンプ
　１２ｄ　移相器
　１３　第１受信部
　１３ａ　受信アンテナ
　１３ｂ　バンドパスフィルタ
　１３ｃ　受信アンプ
　１３ｄ　移相器
　１３ｅ　切替えスイッチ
　１４　第１検波部
　１４ａ　ミキサ
　１４ｂ　ローパスフィルタ
　１５　第２検波部
　１５ａ　局部発振器
　１５ｂ　ミキサ
　１５ｃ　ローパスフィルタ
　１６　第１制御部
　２０　演算制御部
　２１　第２信号発生部
　２１ａ　局部発振器
　２１ｂ　ミキサ
　２１ｃ　バンドパスフィルタ
　２２　第２送信部
　２２ａ　送信アンテナ
　２２ｂ　バンドパスフィルタ
　２２ｃ　送信アンプ
　２３　第２受信部
　２３ａ　受信アンテナ
　２３ｂ　バンドパスフィルタ
　２３ｃ　受信アンプ
　２４　第３検波部
　２４ａ　局部発振器
　２４ｂ　ミキサ
　２４ｃ　ローパスフィルタ
　２５　演算部
　２６　第２制御部　３０　対象物
　１０１　無線センサシステム
　１１０　センサ部
　１１２　送受信部
　１１２ａ　送受信アンテナ
　１１２ｂ　バンドパスフィルタ
　１１２ｃ　切替えスイッチ
　１１２ｄ　移相器
　２０１　無線センサシステム DESCRIPTION OF SYMBOLS 1 Wireless sensor system 10 Sensor part 11 1st signal generation part 11a Local oscillator 11b Mixer 11c Band pass filter 12 1st transmission part 12a Transmission antenna 12b Band pass filter 12c Transmission amplifier 12d Phase shifter 13 1st reception part 13a Reception antenna 13b Bandpass filter 13c Reception amplifier 13d Phase shifter 13e Changeover switch 14 First detection unit 14a Mixer 14b Low pass filter 15 Second detection unit 15a Local oscillator 15b Mixer 15c Low pass filter 16 First control unit 20 Operation control unit 21 Second signal generation Unit 21a local oscillator 21b mixer 21c bandpass filter 22 second transmission unit 22a transmission antenna 22b bandpass filter 22c transmission amplifier 23 second reception unit 23a reception antenna 23b bandpass Filter 23c reception amplifier 24 third detection unit 24a local oscillator 24b mixer 24c low-pass filter 25 arithmetic unit 26 second control unit 30 object 101 wireless sensor system 110 sensor unit 112 transmission / reception unit 112a transmission / reception antenna 112b bandpass filter 112c changeover switch 112d Phase shifter 201 wireless sensor system

Claims (5)

  1. 　検知用の高周波信号である検知信号と対象物からの前記検知信号の反射信号とを用いて前記対象物の動きを検知するセンサ部と、
    　前記対象物の動きを演算すると共に前記センサ部を制御する演算制御部と、
    　を備えた無線センサシステムであって、
    　前記センサ部は、
    　前記検知信号を生成する第１信号発生部と、
    　前記検知信号を無線送信する第１送信部と、
    　前記反射信号と制御用の高周波信号である制御信号とを無線受信する第１受信部と、
    　前記検知信号と前記反射信号との混合信号に基づいて検知データを生成する第１検波部と、
    　前記制御信号から前記センサ部の制御に関する制御情報を検出する第２検波部と、
    　前記検知データに基づいて前記検知信号に変調を加えると共に、前記制御情報に基づいて前記センサ部の制御を実行する第１制御部と、
    　を有し、
    　前記演算制御部は、
    　前記制御信号を生成する第２信号発生部と、
    　前記制御信号を無線送信する第２送信部と、
    　前記検知信号を無線受信する第２受信部と、
    　前記検知信号から前記検知データを検出する第３検波部と、
    　前記検知データに基づいて前記対象物の動きを演算する演算部と、
    　前記演算部の演算結果に基づいて前記制御情報を生成すると共に、前記制御情報に基づいて前記制御信号に変調を加える第２制御部と、
    　を有し、
    　前記センサ部と前記演算制御部との間の無線通信を利用して、前記検知データと前記制御情報との伝達を行うことを特徴とする無線センサシステム。     A sensor unit that detects movement of the object using a detection signal that is a high-frequency signal for detection and a reflection signal of the detection signal from the object;
    An arithmetic control unit for calculating the movement of the object and controlling the sensor unit;
    A wireless sensor system comprising:
    The sensor unit is
    A first signal generator for generating the detection signal;
    A first transmitter for wirelessly transmitting the detection signal;
    A first receiver that wirelessly receives the reflected signal and a control signal that is a high-frequency signal for control;
    A first detector for generating detection data based on a mixed signal of the detection signal and the reflected signal;
    A second detector for detecting control information related to the control of the sensor unit from the control signal;
    A first control unit that modulates the detection signal based on the detection data and that controls the sensor unit based on the control information;
    Have
    The arithmetic control unit is
    A second signal generator for generating the control signal;
    A second transmitter for wirelessly transmitting the control signal;
    A second receiver for wirelessly receiving the detection signal;
    A third detector for detecting the detection data from the detection signal;
    A calculation unit for calculating the movement of the object based on the detection data;
    A second control unit that generates the control information based on a calculation result of the calculation unit, and that modulates the control signal based on the control information;
    Have
    A wireless sensor system that transmits the detection data and the control information using wireless communication between the sensor unit and the arithmetic control unit.
  2. 　前記センサ部と前記演算制御部とは、
    　前記第１送信部が前記検知信号を無線送信する第１時間帯と、
    　前記第２送信部が前記制御信号を無線送信する第２時間帯と、
    　に時間を分割して動作することを特徴とする、
    　請求項１に記載の無線センサシステム。     The sensor unit and the calculation control unit are:
    A first time zone in which the first transmission unit wirelessly transmits the detection signal;
    A second time zone in which the second transmission unit wirelessly transmits the control signal;
    It operates by dividing time into
    The wireless sensor system according to claim 1.
  3. 　前記センサ部は、
    　前記検知信号の周波数を変化させる周波数可変手段と、
    　前記検知信号の信号強度を変化させる信号強度可変手段と、
    　のうちの少なくとも１つを有していることを特徴とする、
    　請求項１又は請求項２に記載の無線センサシステム。     The sensor unit is
    Frequency variable means for changing the frequency of the detection signal;
    Signal intensity varying means for changing the signal intensity of the detection signal;
    Having at least one of:
    The wireless sensor system according to claim 1 or 2.
  4. 　前記センサ部は、
    　前記検知信号の位相を変化させる第１位相可変手段と、
    　前記反射信号の位相を変化させる第２位相可変手段と、
    　のうちの少なくとも１つを有していることを特徴とする、
    　請求項１ないし請求項３のいずれかに記載の無線センサシステム。     The sensor unit is
    First phase varying means for changing the phase of the detection signal;
    Second phase varying means for changing the phase of the reflected signal;
    Having at least one of:
    The wireless sensor system according to any one of claims 1 to 3.
  5. 　複数の前記センサ部を備え、
    　前記演算制御部は、
    　複数の前記センサ部ごとに前記制御情報の伝達を行うことを特徴とする、
    　請求項１ないし請求項４のいずれかに記載の無線センサシステム。     A plurality of sensor units;
    The arithmetic control unit is
    The control information is transmitted for each of the plurality of sensor units,
    The wireless sensor system according to claim 1.
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JP2004293103A (en) * 2003-03-26 2004-10-21 Toto Ltd Urinal device
JP2006275629A (en) * 2005-03-28 2006-10-12 National Institute Of Advanced Industrial & Technology Moving object detector

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JP2004061195A (en) * 2002-07-26 2004-02-26 Fujitsu Ltd The road condition judgment method and road condition judgment program

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6470899A (en) * 1987-09-11 1989-03-16 Mitutoyo Corp Remote measuring instrument
JP2001356169A (en) * 2000-06-14 2001-12-26 Toshiba Corp Airplane detecting system
JP2004293103A (en) * 2003-03-26 2004-10-21 Toto Ltd Urinal device
JP2006275629A (en) * 2005-03-28 2006-10-12 National Institute Of Advanced Industrial & Technology Moving object detector

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