WO2014061239A1 - Communication sensor device - Google Patents

Communication sensor device Download PDF

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Publication number
WO2014061239A1
WO2014061239A1 PCT/JP2013/006052 JP2013006052W WO2014061239A1 WO 2014061239 A1 WO2014061239 A1 WO 2014061239A1 JP 2013006052 W JP2013006052 W JP 2013006052W WO 2014061239 A1 WO2014061239 A1 WO 2014061239A1
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Prior art keywords
transmission
circuit
signal
communication
detection
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PCT/JP2013/006052
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French (fr)
Japanese (ja)
Inventor
竇　元珠
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アルプス電気株式会社
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Priority to JP2014541934A priority Critical patent/JPWO2014061239A1/en
Priority to CN201380052908.0A priority patent/CN104737031A/en
Publication of WO2014061239A1 publication Critical patent/WO2014061239A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/50—Systems of measurement based on relative movement of target
    • G01S13/52—Discriminating between fixed and moving objects or between objects moving at different speeds
    • G01S13/56—Discriminating between fixed and moving objects or between objects moving at different speeds for presence detection

Definitions

  • the present invention relates to a communication sensor device, and more particularly, to a communication sensor device that can reduce power consumption.
  • sensors that measure the distance to a detection target using radio waves sensors that detect the presence or proximity of the detection target by detecting the movement of the detection target, and the like have been proposed.
  • a transmission circuit that transmits a high-frequency signal digitally modulated by a modulation circuit 901, a transmission antenna 902 that radiates a high-frequency signal, and a communication partner.
  • a receiving antenna 902 that receives a signal and a reflected wave from an object, a receiving circuit that demodulates a received signal output from the receiving antenna 902 by a demodulating circuit 903 and takes in a signal from a communication partner as received data; and a transmitting circuit Phase detection for phase detection of a combined signal obtained by interfering a part of the high-frequency signal fed to the receiving antenna 902 and a reflected wave reception signal that is a reflected wave from the object received by the receiving antenna 902 during high-frequency signal transmission
  • a signal processing circuit for detecting a change in position of the object by signal processing the detection signal output from the circuit 904 and the phase detection circuit 904 It is provided with a 905, a.
  • data communication and sensing are realized at the same frequency at the same time by using a transmission signal used for communication as a radio wave for sensing.
  • a sensing operation for detecting the movement of the object can be performed while maintaining the state.
  • information such as data related to the movement of a detection target such as a person detected by the sensing function is about 1 Hz if the data related to the movement of the detection target such as a person is, for example, a body movement associated with a human heartbeat or respiration. Even body movements associated with walking and exercise are few tens of Hz or less.
  • the communication sensor device of the prior art uses the transmission signal used for communication as it is as a radio wave for sensing, so the amount of detected data obtained by the sensing function
  • the amount of data that can be transmitted and received by the communication function is extremely small, and it is necessary to send empty transmission data that does not include the detection data obtained by the sensing function in the transmission data, which wastes power consumption as a communication sensor device. There was a problem that it would increase.
  • the sensitivity of the sensing function is lowered because the average transmission power is lowered if the frequency of the transmission operation is lowered in accordance with the detected data amount obtained by the sensing function.
  • the present invention solves the above-described problems, and an object of the present invention is to provide a communication sensor device that can reduce the sensitivity of the sensor and reduce power consumption.
  • the communication sensor device radiates a transmission signal and receives a communication signal from a communication partner and a reflected wave reception signal that is a reflected wave from a detection target;
  • a transmission / reception unit including a transmission circuit having a modulation circuit and a reception circuit having a demodulation circuit to perform communication connected to the antenna; a control circuit connected to the transmission / reception unit and controlling the transmission / reception unit;
  • a detection circuit for detecting a composite signal of a part of the transmission signal and the reflected wave reception signal received by the antenna during transmission of the transmission signal from the transmission circuit via the antenna; and
  • a low-pass filter that is connected and has a cutoff frequency set lower than a modulation frequency for modulation by the modulation circuit, and a signal processing circuit that processes a signal output from the low-pass filter.
  • the control circuit controls the transmission / reception unit, and alternately repeats a transmission operation and a non-transmission operation at a constant period, and transmits the transmission.
  • the operation is characterized by alternately repeating a detection transmission operation for obtaining the reflected wave reception signal one or more times and a communication transmission operation n times (n is a natural number) for transmitting data.
  • the communication sensor device is characterized in that the transmission operation alternately repeats one or more detection transmission operations and one communication transmission operation.
  • the communication sensor device is characterized in that the detection transmission operation is shorter than the communication transmission operation.
  • the control circuit controls the transmission / reception unit, and alternately repeats the transmission operation and the non-transmission operation at a constant cycle, and the transmission operation is for obtaining one or more reflected wave reception signals. Since the detection transmission operation and the n transmission transmission operation for transmitting data (n is a natural number) are controlled to be repeated alternately, the frequency of the communication transmission operation can be reduced. For this reason, since the frequency which operates a modulation circuit or a demodulation circuit can be made low, the power consumption of a communication sensor apparatus can be reduced.
  • the transmission operation since the transmission operation alternately repeats one or more detection transmission operations and one communication transmission operation, the power consumption of the communication sensor device can be further reduced. .
  • the detection transmission operation since the detection transmission operation has a shorter time than the communication transmission operation, the power consumption of the communication sensor device can be further reduced.
  • the communication sensor device 100 communicates with the communication partner 200 by radiating a transmission signal and receiving a communication signal from the communication partner 200, and detects a reflected wave from the detection target and detects the detection target. Detection is performed.
  • FIG. 2 is a block diagram showing the configuration of the communication sensor device 100.
  • the communication sensor device 100 includes a transmission / reception unit 10, a detection unit 20, and a control circuit 7.
  • the communication sensor device 100 has a power supply circuit 8 to supply operation power to each part of the communication sensor device 100.
  • the antenna 1 radiates a transmission signal output from the transmission / reception unit 10 and receives a communication signal radiated from the communication partner 200 and a reflected wave in which the transmission signal is reflected by the detection target.
  • the transmission / reception unit 10 is connected to the antenna 1 and includes a transmission circuit 2 having a modulation circuit 2a that converts information to be transmitted to the communication partner 200 into a transmission signal, and a demodulation circuit that extracts reception information from the communication signal transmitted from the communication partner 200.
  • a receiving circuit 3 having 3a is provided.
  • the transmission / reception unit 10 amplifies the received signal as a part of the power amplifier (hereinafter referred to as PA) for outputting the transmission signal as a part of the transmission circuit 2 as a part of the transmission circuit 2 and the reception circuit 3
  • PA power amplifier
  • the detection unit 20 is connected to the antenna 1 and includes a detection circuit 4, a low-pass filter 5 (hereinafter referred to as LPF), and a signal processing circuit 6.
  • LPF low-pass filter 5
  • the detection circuit 4 is a reflected wave reception signal in which a part of the transmission signal and a reflected wave obtained by reflecting the transmission signal on the detection target are received by the antenna 1.
  • the combined signal is detected and output.
  • the LPF 5 is connected to the detection circuit 4, outputs a signal component related to the motion of the detection target included in the output signal of the detection circuit 4, and removes a modulation component of the transmission signal included in the output signal of the detection circuit 4.
  • the cut-off frequency is set lower than the modulation frequency at which modulation is performed by the modulation circuit 2a.
  • the signal processing circuit 6 performs signal processing such as amplification, sampling, and AD conversion on the signal output from the LPF 5 and outputs the result.
  • the control circuit 7 is connected to the transmission / reception unit 10, controls the operation state of the transmission circuit 2 and the reception circuit 3 of the transmission / reception unit 10, and outputs information to be transmitted to the communication partner 200 to the modulation circuit 2 a provided in the transmission circuit 2. Then, the reception information is received from the demodulation circuit 3 a provided in the reception circuit 3.
  • the control circuit 7 is further connected to the detection unit 20 and receives an output signal from the signal processing circuit 6 provided in the detection unit 20 to determine whether or not there is a detection target, an operation, and the like.
  • FIG. 3 is a diagram illustrating the operation timing of the communication sensor device 100.
  • 3A, 3B, and 3C show timings when the control circuit 7 controls the transmission circuit 2 and the reception circuit 3.
  • FIG. 3A, 3B, and 3C show timings when the control circuit 7 controls the transmission circuit 2 and the reception circuit 3.
  • the control circuit 7 controls the transmission circuit 2 including the modulation circuit 2a to be turned on at time T1 and performs a communication transmission operation for the communication partner 200 during time t1. Control is performed such that a transmission signal including information to be transmitted is transmitted from the transmission circuit 2 to the outside via the antenna 1, and the transmission circuit 2 including the modulation circuit 2a is controlled to be OFF after t1.
  • control circuit 7 controls the receiving circuit 3 to be ON after time t2 from the end of transmission in order to receive the communication signal transmitted from the communication partner 200 with respect to the transmission signal transmitted between time T1 and time t1.
  • the receiving circuit 3 is controlled to be OFF.
  • control circuit 7 controls the transmission circuit 2 excluding the modulation circuit 2a to be ON for a time t5 shorter than the time t1 of the communication transmission operation as the detection transmission operation after the time t4 has elapsed from the time T1. Control is performed so that a transmission signal that does not include information to be transmitted to the outside is transmitted from the transmission circuit 2 to the outside via the antenna 1, and the transmission circuit 2 is controlled to be OFF after t5.
  • the detection transmission operation is performed to obtain a reflected wave reception signal, and the detection transmission operation does not include information to be sent to the communication partner 200. Therefore, no communication signal is sent from the communication partner 200 after the transmission operation, and it is not necessary to operate the reception circuit 3 after the detection transmission operation is completed, and therefore the reception circuit 3 is not controlled.
  • FIG. 3 shows an example in which the second transmission operation is repeated four times.
  • control circuit 7 performs control so that the transmission operation and the non-transmission operation are alternately repeated at a constant cycle, and includes information to be transmitted to the communication partner 200 as a communication transmission operation at every time t6.
  • the reception circuit 3 is controlled to be ON after time t2 from the end of transmission, and during the time t3. Since control is performed so as to receive a communication signal sent from the communication partner 200, it is possible to perform a wireless communication operation with the communication partner 200.
  • control circuit 7 performs communication for one or more detection transmission operations (in the case of four times in FIG. 3) and n times (in the case of one time in FIG. 3) of transmitting data. Therefore, the frequency of the communication transmission operation can be reduced. For this reason, the frequency which operates the modulation circuit 2a and the demodulation circuit 3a can be made low, and the power consumption of a communication sensor apparatus can be reduced.
  • FIGS. 3D and 3E are diagrams showing the operation of the detection unit 20.
  • FIG. 3D shows an output obtained by detecting a combined signal of a part of the transmission signal in the detection circuit 4 and a reflected wave reception signal in which the reflected wave of the transmission signal reflected by the detection target is received by the antenna 1.
  • a signal obtained by detecting a combined signal of a part of the transmission signal and the reflected wave reception signal is output.
  • the output signal of the detection circuit 4 includes a modulation component of the transmission signal and a signal component related to the motion of the detection target.
  • FIG. 3E is a diagram illustrating the output of the LPF 5 when the output of the detection circuit 4 is input to the LPF 5.
  • the LPF 5 outputs a signal component related to the motion of the detection target included in the output signal of the detection circuit 4, and the cutoff frequency is a modulation circuit in order to remove the modulation component of the transmission signal included in the output signal of the detection circuit 4. Since it is set lower than the modulation frequency at which modulation is performed in 2a, a signal higher than the cutoff frequency such as a modulation component does not appear in the output.
  • the capacitor constituting the LPF 5 is charged by the signal component related to the motion of the detection target having a frequency lower than the cut-off frequency of the LPF 5 included in the output signal of the detection circuit 4, and after the time of transmission operation, the LPF 5 The output gradually decreases due to a discharge path constituted by the above circuit, or a leakage current that takes the insulation resistance of a part or the like constituting the LPF 5 as a path.
  • the control circuit 7 controls the transmission / reception unit 10 and alternately repeats the transmission operation and the non-transmission operation at a constant time t4, the frequency of the transmission operation is kept constant, and the decrease in average transmission power is suppressed. . Therefore, the capacitor constituting the LPF 5 is charged at a constant time t4 period, and a decrease in output due to the discharge of the LPF 5 can be prevented, so that a decrease in sensitivity of the sensing function can be suppressed.
  • FIG. 4 is a diagram illustrating an operation in which a motion of a detection target is detected.
  • FIG. 4A shows the movement of the detection target.
  • FIG. 4B is a diagram illustrating a transmission output transmitted from the communication sensor device 100.
  • FIG. 4C is a diagram illustrating a transmission signal of the communication sensor device 100 and an output signal obtained by detecting the combined signal of the reflected wave reception signal in which the transmission signal is reflected by the detection target by the detection circuit 4.
  • FIG. 4D is a diagram illustrating the LPF output when the detection output of FIG. 4C is input to the LPF 5.
  • the communication transmission signal and the transmission signal transmitted from the communication sensor device 100 are transmitted to the detection target moving as shown in FIG. 4A at the timing shown in FIG. 4B, and reflected by the detection target during transmission. Then, the reflected wave reception signal received by the antenna 1 and a part of the transmission wave are input to the detection circuit 4.
  • the amplitude of the combined signal of a part of the transmission wave and the reflected wave reception signal depends on the phase difference between the two signals. Changes.
  • phase difference is 0 degree
  • the amplitude of the synthesized signal is maximized, and the amplitude of the synthesized signal is reversed when the phase is opposite (phase difference is 180 degrees).
  • the detection circuit 4 detects a composite signal of a part of the input transmission wave and the reflected wave reception signal, and outputs a detection signal corresponding to the amplitude.
  • the signal processing circuit 6 performs signal processing such as amplification, sampling, AD conversion, etc. on the output signal of the LPF 5, and the signal processing circuit 6 or the control circuit 7 performs analysis, feature extraction, or the like to detect this signal.
  • the movement of the object can be detected.
  • the control circuit 7 controls the transmission / reception unit 10 and alternately repeats the transmission operation and the non-transmission operation at a constant cycle. Therefore, the frequency of the transmission operation can be kept constant, and the average transmission power can be reduced. Can be suppressed.
  • the control circuit 7 alternately repeats a detection transmission operation for obtaining one or more reflected wave reception signals and n communication transmission operations for transmitting data (n is a natural number). Thus, the frequency of the communication transmission operation can be reduced. For this reason, since the frequency which operates the modulation circuit 2a and the demodulation circuit 3a can be made low, the power consumption of the communication sensor apparatus 100 can be reduced.
  • the control circuit 7 can further reduce the power consumption of the communication sensor device by performing control so that the transmission operation is one or more detection transmission operations and the one communication transmission operation are alternately repeated. it can.
  • the detection transmission operation has a shorter time than the communication transmission operation, the power consumption of the communication sensor device can be further reduced.
  • the communication sensor device 100 As described above, according to the communication sensor device 100 according to the embodiment of the present invention, it is possible to provide a communication sensor device that can reduce the sensitivity of the sensor and reduce the power consumption.
  • the communication sensor device 100 As described above, the communication sensor device 100 according to the embodiment of the present invention has been specifically described. However, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. Is possible. For example, the present invention can be modified as follows, and these embodiments also belong to the technical scope of the present invention.
  • the communication sensor device has been described with reference to a drawing away from the detection target.
  • the communication sensor device may be carried or worn to detect the body movement of the detection target.
  • the detection transmission operation may be performed once or more, and is used.
  • the frequency may be appropriately changed according to the purpose.
  • the communication transmission operation is performed once every four detection transmission operations has been described.
  • the communication transmission operation may be performed more than once and used.
  • the frequency may be appropriately changed according to the purpose.

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
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Abstract

In order to provide a communication sensor device for which there is little reduction in sensor sensitivity and which can reduce power consumption, the present invention comprises the following: an antenna (1) that emits a transmission signal and receives a communication signal from a communication partner and a reflected wave reception signal which is a reflected wave from a detection object; a transmission and reception unit (10) provided with a transmission circuit (2) that has a modulation circuit (2a), and a reception circuit (3) that has a demodulation circuit (3a), where both are connected to the antenna (1) and are for communication; a control circuit (7) that is connected to the transmission and reception unit (10) and controls the transmission and reception unit (10); a detection circuit (4) for detecting a synthesized signal of a portion of a transmission signal and a reflected wave reception signal, during transmission of a transmission signal from the transmission circuit (2) via the antenna (1); an LPF (5) that is connected to the detection circuit (4) and in which a cut-off frequency is set so as to be lower than a modulation frequency for performing modulation using the modulation circuit (2a); and a signal processing circuit (6) for processing the signal output from the LPF (5). A transmission operation and a non-transmission operation are alternatingly repeated in a fixed period, and the transmission operation is carried out so that a transmission operation for detection and a transmission operation for communication are alternatingly repeated.

Description

通信センサ装置Communication sensor device
　本発明は、通信センサ装置に関し、特に、消費電力を低減することができる通信センサ装置に関する。 The present invention relates to a communication sensor device, and more particularly, to a communication sensor device that can reduce power consumption.
　従来から、電波を用いて検出対象までの距離を測定するセンサや、検出対象の動きを検出し検出対象の有無や接近を検出するセンサなどが提案されている。 Conventionally, sensors that measure the distance to a detection target using radio waves, sensors that detect the presence or proximity of the detection target by detecting the movement of the detection target, and the like have been proposed.
　近年、このような電波を用いたセンサが非接触で検出対象の動きを検出できることから様々な分野での応用が検討されており、特にセキュリティやヘルスケアの用途で人の検知や体の動きを検出する方法が提案されている。 In recent years, such sensors that use radio waves can detect the movement of a detection target without contact, and are being studied for various fields of application. Especially in security and healthcare applications, human detection and body movement are being investigated. A detection method has been proposed.
　特許文献１に記載の通信センサ装置９００では、図５に示すように、変調回路９０１によりデジタル変調された高周波信号を送信する送信回路と、高周波信号を放射する送信アンテナ９０２と、通信相手からの信号と対象物からの反射波を受信する受信アンテナ９０２と、受信アンテナ９０２から出力される受信信号を復調回路９０３により復調して通信相手からの信号を受信データとして取り込む受信回路と、送信回路から高周波信号送信中に、受信アンテナ９０２へ給電した高周波信号の一部と受信アンテナ９０２で受信された対象物からの反射波である反射波受信信号とを干渉させた合成信号を位相検波する位相検波回路９０４と、位相検波回路９０４から出力される検波信号を信号処理して対象物の位置変化検出を行う信号処理回路９０５と、を備えている。 In the communication sensor device 900 described in Patent Document 1, as shown in FIG. 5, a transmission circuit that transmits a high-frequency signal digitally modulated by a modulation circuit 901, a transmission antenna 902 that radiates a high-frequency signal, and a communication partner. A receiving antenna 902 that receives a signal and a reflected wave from an object, a receiving circuit that demodulates a received signal output from the receiving antenna 902 by a demodulating circuit 903 and takes in a signal from a communication partner as received data; and a transmitting circuit Phase detection for phase detection of a combined signal obtained by interfering a part of the high-frequency signal fed to the receiving antenna 902 and a reflected wave reception signal that is a reflected wave from the object received by the receiving antenna 902 during high-frequency signal transmission A signal processing circuit for detecting a change in position of the object by signal processing the detection signal output from the circuit 904 and the phase detection circuit 904 It is provided with a 905, a.
送信回路から高周波信号送信中に、受信アンテナ９０２へ給電した高周波信号の一部と受信アンテナ９０２で受信された反射波受信信号とを干渉させた合成信号を位相検波することで、データ通信に使用している信号を用いてデータ通信とセンシングとを同時に同一周波数で実現できる通信センサ装置の技術が開示されている。 Used for data communication by phase detection of a combined signal obtained by interfering a part of the high-frequency signal supplied to the receiving antenna 902 and the reflected wave received signal received by the receiving antenna 902 during high-frequency signal transmission from the transmission circuit The technology of the communication sensor apparatus which can implement | achieve data communication and sensing simultaneously with the same frequency using the signal which is carrying out is disclosed.
　特許文献１に記載の通信センサ装置９００では、通信に使用している送信信号をセンシング用の電波としても使用することでデータ通信とセンシングとを同時に同一周波数で実現しているので、通信速度を維持したままで対象物の動きを検知するセンシング動作を行うことができる。 In the communication sensor device 900 described in Patent Document 1, data communication and sensing are realized at the same frequency at the same time by using a transmission signal used for communication as a radio wave for sensing. A sensing operation for detecting the movement of the object can be performed while maintaining the state.
　このような通信センサ装置を用いることで、センシング機能で検出した対象物の動作に関するデータを通信機能で通信相手に送ることも簡単に実現することができる。 By using such a communication sensor device, it is also possible to easily realize data related to the operation of the object detected by the sensing function to the communication partner using the communication function.
ＷＯ２０１１／１４２２１１WO2011 / 142211
　しかしながら、センシング機能で検出した人などの検出対象の動きに関するデータなどの情報は、人などの検出対象の動きに関するデータが、例えばヒトの心拍や呼吸に伴う体動であれば約１Ｈｚ程度であり、歩行や運動に伴う体動でも数１０Ｈｚ程度以下と少ない。 However, information such as data related to the movement of a detection target such as a person detected by the sensing function is about 1 Hz if the data related to the movement of the detection target such as a person is, for example, a body movement associated with a human heartbeat or respiration. Even body movements associated with walking and exercise are few tens of Hz or less.
　そのようなデータを扱う通信センサ装置の場合、従来技術の通信センサ装置では、通信に使用している送信信号をそのままセンシング用の電波としても使用しているので、センシング機能で得られる検出データ量が、通信機能で送受信できるデータ量と比較して非常に少なくなり、送信データにセンシング機能で得られる検出データが含まれない空送信データを送る必要が生じ、通信センサ装置としての消費電力が無駄に増大してしまう、と言う課題があった。 In the case of a communication sensor device that handles such data, the communication sensor device of the prior art uses the transmission signal used for communication as it is as a radio wave for sensing, so the amount of detected data obtained by the sensing function However, the amount of data that can be transmitted and received by the communication function is extremely small, and it is necessary to send empty transmission data that does not include the detection data obtained by the sensing function in the transmission data, which wastes power consumption as a communication sensor device. There was a problem that it would increase.
　また、センシング機能で得られる検出データ量に合わせて送信動作の頻度を下げてしまうと平均送信電力が下がってしまうので、センシング機能の感度が下がってしまう、と言う課題があった。 Also, there is a problem that the sensitivity of the sensing function is lowered because the average transmission power is lowered if the frequency of the transmission operation is lowered in accordance with the detected data amount obtained by the sensing function.
　本発明は、上述した課題を解決するもので、センサの感度低下が少なく、消費電力を低減することができる通信センサ装置を提供することを目的とする。 The present invention solves the above-described problems, and an object of the present invention is to provide a communication sensor device that can reduce the sensitivity of the sensor and reduce power consumption.
　この課題を解決するために、請求項１に記載の通信センサ装置は、送信信号を放射し、通信相手からの通信信号と検出対象からの反射波である反射波受信信号を受信するアンテナと、前記アンテナに接続され通信を行うため、変調回路を有する送信回路と、復調回路を有する受信回路と、を備えた送受信部と、前記送受信部に接続され、前記送受信部を制御する制御回路と、前記送信回路から前記アンテナを介して前記送信信号を送信中に、前記送信信号の一部と前記アンテナで受信された前記反射波受信信号との合成信号を検波する検波回路と、前記検波回路に接続され、カットオフ周波数が前記変調回路で変調を行う変調周波数より低く設定されたローパスフィルタと、前記ローパスフィルタから出力される信号を処理する信号処理回路と、を有し、検出対象の動きを検知可能な通信センサ装置であって、前記制御回路は前記送受信部を制御し、一定の周期で送信動作と非送信動作を交互に繰り返すとともに、前記送信動作は、１回以上の前記反射波受信信号を得るための検知用送信動作と、データの送信を行うｎ回（ｎは自然数）の通信用送信動作とを交互に繰り返すことを特徴とする。 In order to solve this problem, the communication sensor device according to claim 1 radiates a transmission signal and receives a communication signal from a communication partner and a reflected wave reception signal that is a reflected wave from a detection target; A transmission / reception unit including a transmission circuit having a modulation circuit and a reception circuit having a demodulation circuit to perform communication connected to the antenna; a control circuit connected to the transmission / reception unit and controlling the transmission / reception unit; A detection circuit for detecting a composite signal of a part of the transmission signal and the reflected wave reception signal received by the antenna during transmission of the transmission signal from the transmission circuit via the antenna; and A low-pass filter that is connected and has a cutoff frequency set lower than a modulation frequency for modulation by the modulation circuit, and a signal processing circuit that processes a signal output from the low-pass filter. The control circuit controls the transmission / reception unit, and alternately repeats a transmission operation and a non-transmission operation at a constant period, and transmits the transmission. The operation is characterized by alternately repeating a detection transmission operation for obtaining the reflected wave reception signal one or more times and a communication transmission operation n times (n is a natural number) for transmitting data.
　また、請求項２に記載の通信センサ装置は、前記送信動作は、１回以上の前記検知用送信動作と、１回の前記通信用送信動作とを交互に繰り返すことを特徴とする。 The communication sensor device according to claim 2 is characterized in that the transmission operation alternately repeats one or more detection transmission operations and one communication transmission operation.
　また、請求項３に記載の通信センサ装置は、前記検知用送信動作は、前記通信用送信動作より短い時間であることを特徴とする。 Further, the communication sensor device according to claim 3 is characterized in that the detection transmission operation is shorter than the communication transmission operation.
　請求項１の発明によれば、制御回路は前記送受信部を制御し、一定の周期で送信動作と非送信動作を交互に繰り返すとともに、送信動作は、１回以上の反射波受信信号を得るための検知用送信動作と、データの送信を行うｎ回（ｎは自然数）の通信用送信動作とを交互に繰り返すように制御するので、通信用送信動作の頻度を低くすることができる。このため変調回路や復調回路を動作させる頻度を低くすることができるので、通信センサ装置の消費電力を低減させることができる。 According to the first aspect of the present invention, the control circuit controls the transmission / reception unit, and alternately repeats the transmission operation and the non-transmission operation at a constant cycle, and the transmission operation is for obtaining one or more reflected wave reception signals. Since the detection transmission operation and the n transmission transmission operation for transmitting data (n is a natural number) are controlled to be repeated alternately, the frequency of the communication transmission operation can be reduced. For this reason, since the frequency which operates a modulation circuit or a demodulation circuit can be made low, the power consumption of a communication sensor apparatus can be reduced.
　請求項２の発明によれば、送信動作は、１回以上の検知用送信動作と、１回の通信用送信動作とを交互に繰り返すので、通信センサ装置の消費電力をさらに低減させることができる。 According to the invention of claim 2, since the transmission operation alternately repeats one or more detection transmission operations and one communication transmission operation, the power consumption of the communication sensor device can be further reduced. .
　請求項３の発明によれば、検知用送信動作は、通信用送信動作より短い時間としたので、一層通信センサ装置の消費電力を低減させることができる。 According to the invention of claim 3, since the detection transmission operation has a shorter time than the communication transmission operation, the power consumption of the communication sensor device can be further reduced.
　以上により、本発明によれば、センサの感度低下が少なく、消費電力を低減することができる通信センサ装置を提供することができる。 As described above, according to the present invention, it is possible to provide a communication sensor device that can reduce the sensitivity of the sensor and reduce power consumption.
本発明の実施形態にかかる通信センサ装置の動作概要を示す図である。It is a figure which shows the operation | movement outline | summary of the communication sensor apparatus concerning embodiment of this invention. 本発明の実施形態にかかる通信センサ装置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 communication sensor apparatus concerning embodiment of this invention. 本発明の実施形態にかかる通信センサ装置の動作説明図である。It is operation | movement explanatory drawing of the communication sensor apparatus concerning embodiment of this invention. 本発明の実施形態にかかる通信センサ装置のセンシング動作説明図である。It is sensing operation explanatory drawing of the communication sensor apparatus concerning embodiment of this invention. 従来技術の通信センサ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 communication sensor of a prior art.
　［実施形態］
　以下に本発明の実施形態における通信センサ装置１００について説明する。 [Embodiment]
The communication sensor device 100 according to the embodiment of the present invention will be described below.
　まず始めに本実施形態における通信センサ装置１００の動作概要について図１を用いて説明する。 First, an outline of the operation of the communication sensor device 100 according to the present embodiment will be described with reference to FIG.
　通信センサ装置１００は図１に示すように、送信信号を放射し、通信相手２００からの通信信号を受信することで通信相手２００と通信を行うとともに、検出対象からの反射波を検出し検出対象の検知を行う。 As shown in FIG. 1, the communication sensor device 100 communicates with the communication partner 200 by radiating a transmission signal and receiving a communication signal from the communication partner 200, and detects a reflected wave from the detection target and detects the detection target. Detection is performed.
　次に通信センサ装置１００の構成について図２を用いて説明する。図２は通信センサ装置１００の構成を示すブロック図である。 Next, the configuration of the communication sensor device 100 will be described with reference to FIG. FIG. 2 is a block diagram showing the configuration of the communication sensor device 100.
　通信センサ装置１００は図２に示すように、送受信部１０と、検知部２０と、制御回路７と、を備えている。 As shown in FIG. 2, the communication sensor device 100 includes a transmission / reception unit 10, a detection unit 20, and a control circuit 7.
　また通信センサ装置１００にはその他に電源回路８を有しており、通信センサ装置１００の各部に動作用の電源を供給する。 In addition, the communication sensor device 100 has a power supply circuit 8 to supply operation power to each part of the communication sensor device 100.
　アンテナ１は、送受信部１０から出力される送信信号を放射し、通信相手２００から放射された通信信号と、送信信号が検出対象で反射された反射波を受信する。 The antenna 1 radiates a transmission signal output from the transmission / reception unit 10 and receives a communication signal radiated from the communication partner 200 and a reflected wave in which the transmission signal is reflected by the detection target.
　送受信部１０は、アンテナ１に接続され、通信相手２００に送るべき情報を送信信号に変換する変調回路２ａを有する送信回路２と、通信相手２００から送られた通信信号から受信情報を取り出す復調回路３ａを有する受信回路３を備えている。 The transmission / reception unit 10 is connected to the antenna 1 and includes a transmission circuit 2 having a modulation circuit 2a that converts information to be transmitted to the communication partner 200 into a transmission signal, and a demodulation circuit that extracts reception information from the communication signal transmitted from the communication partner 200. A receiving circuit 3 having 3a is provided.
　送受信部１０にはその他に、送信回路２の一部として送信信号を必要な大きさの出力とするためのパワーアンプ（以下ＰＡと表す）や、受信回路３の一部として受信信号を増幅するためのローノイズアンプ（以下ＬＮＡと表す）や、送受信の周波数を可変して設定するためのＰＬＬ回路や、周波数変換回路などを有している。 In addition, the transmission / reception unit 10 amplifies the received signal as a part of the power amplifier (hereinafter referred to as PA) for outputting the transmission signal as a part of the transmission circuit 2 as a part of the transmission circuit 2 and the reception circuit 3 A low noise amplifier (hereinafter referred to as LNA), a PLL circuit for variably setting a transmission / reception frequency, a frequency conversion circuit, and the like.
　検知部２０は、アンテナ１に接続され、検波回路４と、ローパスフィルタ５（以下ＬＰＦと表す）と、信号処理回路６と、を備えている。 The detection unit 20 is connected to the antenna 1 and includes a detection circuit 4, a low-pass filter 5 (hereinafter referred to as LPF), and a signal processing circuit 6.
　検波回路４は、送信回路２からアンテナ１を介して送信信号を送信中に、送信信号の一部と、送信信号が検出対象で反射された反射波がアンテナ１で受信された反射波受信信号との合成信号を検波して出力する。 While the transmission circuit 2 is transmitting the transmission signal from the transmission circuit 2 via the antenna 1, the detection circuit 4 is a reflected wave reception signal in which a part of the transmission signal and a reflected wave obtained by reflecting the transmission signal on the detection target are received by the antenna 1. The combined signal is detected and output.
　ＬＰＦ５は、検波回路４に接続され、検波回路４の出力信号に含まれる検出対象の動きに関連した信号成分を出力し、検波回路４の出力信号に含まれる送信信号の変調成分を取り除くために、カットオフ周波数が変調回路２ａで変調を行う変調周波数より低く設定されている。 The LPF 5 is connected to the detection circuit 4, outputs a signal component related to the motion of the detection target included in the output signal of the detection circuit 4, and removes a modulation component of the transmission signal included in the output signal of the detection circuit 4. The cut-off frequency is set lower than the modulation frequency at which modulation is performed by the modulation circuit 2a.
　信号処理回路６は、ＬＰＦ５から出力される信号を、増幅、サンプリング、ＡＤ変換、等の信号処理を行い、その結果を出力する。 The signal processing circuit 6 performs signal processing such as amplification, sampling, and AD conversion on the signal output from the LPF 5 and outputs the result.
　制御回路７は送受信部１０に接続され、送受信部１０の送信回路２および受信回路３の動作状態を制御し、また通信相手２００に送るべき情報を送信回路２に備えられた変調回路２ａに出力し、受信回路３に備えられた復調回路３ａから受信情報を受け取る。 The control circuit 7 is connected to the transmission / reception unit 10, controls the operation state of the transmission circuit 2 and the reception circuit 3 of the transmission / reception unit 10, and outputs information to be transmitted to the communication partner 200 to the modulation circuit 2 a provided in the transmission circuit 2. Then, the reception information is received from the demodulation circuit 3 a provided in the reception circuit 3.
　制御回路７はさらに検知部２０に接続され、検知部２０に備えられた信号処理回路６からの出力信号を受け取り検出対象の有無や、動作等の検出判断を行う。 The control circuit 7 is further connected to the detection unit 20 and receives an output signal from the signal processing circuit 6 provided in the detection unit 20 to determine whether or not there is a detection target, an operation, and the like.
　以下に通信センサ装置１００の動作について図３を用いて説明を行う。図３は通信センサ装置１００の動作タイミングを示す図である。 Hereinafter, the operation of the communication sensor device 100 will be described with reference to FIG. FIG. 3 is a diagram illustrating the operation timing of the communication sensor device 100.
　図３（ａ）（ｂ）（ｃ）は、制御回路７が送信回路２および受信回路３を制御するタイミングを示している。 3A, 3B, and 3C show timings when the control circuit 7 controls the transmission circuit 2 and the reception circuit 3. FIG.
　制御回路７は図３（ａ）および（ｂ）に示すように、時刻Ｔ１で変調回路２ａを含めた送信回路２をＯＮに制御し時間ｔ１の間、通信用送信動作として、通信相手２００に送るべき情報を含んだ送信信号が送信回路２からアンテナ１を介して外部に送信されるように制御を行い、ｔ1経過後に変調回路２ａを含めた送信回路２をＯＦＦに制御する。 As shown in FIGS. 3A and 3B, the control circuit 7 controls the transmission circuit 2 including the modulation circuit 2a to be turned on at time T1 and performs a communication transmission operation for the communication partner 200 during time t1. Control is performed such that a transmission signal including information to be transmitted is transmitted from the transmission circuit 2 to the outside via the antenna 1, and the transmission circuit 2 including the modulation circuit 2a is controlled to be OFF after t1.
　次に制御回路７は、時刻Ｔ１から時間ｔ１の間に送信した送信信号に対して、通信相手２００から送られる通信信号を受信するため、送信終了から時間ｔ２後に受信回路３をＯＮに制御し時間ｔ３の間、通信相手２００から送られる通信信号を受信した後、受信回路３をＯＦＦに制御する。 Next, the control circuit 7 controls the receiving circuit 3 to be ON after time t2 from the end of transmission in order to receive the communication signal transmitted from the communication partner 200 with respect to the transmission signal transmitted between time T1 and time t1. During a time t3, after receiving a communication signal sent from the communication partner 200, the receiving circuit 3 is controlled to be OFF.
　その後、制御回路７は時刻Ｔ１から時間ｔ４経過後に検知用送信動作として、変調回路２ａを除く送信回路２を通信用送信動作の時間ｔ１よりも短い時間ｔ５の間ＯＮに制御し、通信相手２００に送るべき情報を含まない送信信号が送信回路２からアンテナ１を介して外部に送信されるように制御を行い、ｔ５経過後に送信回路２をＯＦＦに制御する。 After that, the control circuit 7 controls the transmission circuit 2 excluding the modulation circuit 2a to be ON for a time t5 shorter than the time t1 of the communication transmission operation as the detection transmission operation after the time t4 has elapsed from the time T1. Control is performed so that a transmission signal that does not include information to be transmitted to the outside is transmitted from the transmission circuit 2 to the outside via the antenna 1, and the transmission circuit 2 is controlled to be OFF after t5.
　検知用送信動作は、反射波受信信号を得るために行われるものであり、検知用送信動作には通信相手２００に送るべき情報が含まれていない。そのため、送信動作後に通信相手２００から通信信号が送られることは無く、検知用送信動作終了後には受信回路３を動作させる必要がないので受信回路３の制御は行わない。 The detection transmission operation is performed to obtain a reflected wave reception signal, and the detection transmission operation does not include information to be sent to the communication partner 200. Therefore, no communication signal is sent from the communication partner 200 after the transmission operation, and it is not necessary to operate the reception circuit 3 after the detection transmission operation is completed, and therefore the reception circuit 3 is not controlled.
　検知用送信動作を開始した時刻Ｔ２から更に時間ｔ４経過ごとに、検知用送信動作を繰り返した後、時間ｔ４の複数回分の時間ｔ６経過後、時刻Ｔ１から行った通信用送信動作から始まる制御を繰り返すように制御される。図３では第２の送信動作が４回繰り返されている例を示している。 After the detection transmission operation is repeated every time t4 from the time T2 when the detection transmission operation is started, the control starts from the communication transmission operation performed from the time T1 after the time t6 for a plurality of times t4 has elapsed. Controlled to repeat. FIG. 3 shows an example in which the second transmission operation is repeated four times.
　以上のように、制御回路７は、一定の周期で送信動作と非送信動作を交互に繰り返すように制御しており、時間ｔ６ごとに通信用送信動作として、通信相手２００に送るべき情報を含んだ送信信号が送信回路２からアンテナ１を介して外部に送信され、通信相手２００から送られる通信信号を受信するために、送信終了から時間ｔ２後に受信回路３をＯＮに制御し時間ｔ３の間、通信相手２００から送られる通信信号を受信するよう制御するので、通信相手２００と無線による通信動作を行うことができる。 As described above, the control circuit 7 performs control so that the transmission operation and the non-transmission operation are alternately repeated at a constant cycle, and includes information to be transmitted to the communication partner 200 as a communication transmission operation at every time t6. In order to receive a communication signal transmitted from the transmission circuit 2 to the outside through the antenna 1 and transmitted from the communication partner 200, the reception circuit 3 is controlled to be ON after time t2 from the end of transmission, and during the time t3. Since control is performed so as to receive a communication signal sent from the communication partner 200, it is possible to perform a wireless communication operation with the communication partner 200.
　また制御回路７は、送信動作が１回以上の検知用送信動作（図３では４回の場合を例示）と、データの送信を行うｎ回（図３では１回の場合を例示）の通信用送信動作とを交互に繰り返すように制御するので、通信用送信動作の頻度を低くすることができる。このため変調回路２ａや復調回路３ａを動作させる頻度を低くすることができ、通信センサ装置の消費電力を低減させることができる。 In addition, the control circuit 7 performs communication for one or more detection transmission operations (in the case of four times in FIG. 3) and n times (in the case of one time in FIG. 3) of transmitting data. Therefore, the frequency of the communication transmission operation can be reduced. For this reason, the frequency which operates the modulation circuit 2a and the demodulation circuit 3a can be made low, and the power consumption of a communication sensor apparatus can be reduced.
　図３（ｄ）（ｅ）は検知部２０の動作を示す図である。 FIGS. 3D and 3E are diagrams showing the operation of the detection unit 20.
　図３（ｄ）は、検波回路４で送信信号の一部と、送信信号が検出対象で反射された反射波がアンテナ１で受信された反射波受信信号との合成信号が検波された出力を示す図で、送信回路２が送信中に、送信信号の一部と反射波受信信号の合成信号が検波された信号が出力される。 FIG. 3D shows an output obtained by detecting a combined signal of a part of the transmission signal in the detection circuit 4 and a reflected wave reception signal in which the reflected wave of the transmission signal reflected by the detection target is received by the antenna 1. In the figure, during transmission by the transmission circuit 2, a signal obtained by detecting a combined signal of a part of the transmission signal and the reflected wave reception signal is output.
　検波回路４の出力信号には、送信信号の変調成分と検出対象の動きに関連した信号成分が含まれている。 The output signal of the detection circuit 4 includes a modulation component of the transmission signal and a signal component related to the motion of the detection target.
　図３（ｅ）は、検波回路４の出力がＬＰＦ５に入力された際のＬＰＦ５の出力を示す図である。 FIG. 3E is a diagram illustrating the output of the LPF 5 when the output of the detection circuit 4 is input to the LPF 5.
　ＬＰＦ５は、検波回路４の出力信号に含まれる検出対象の動きに関連した信号成分を出力し、検波回路４の出力信号に含まれる送信信号の変調成分を取り除くために、カットオフ周波数が変調回路２ａで変調を行う変調周波数より低く設定されているので、変調成分などのカットオフ周波数より高い信号は出力に表れない。 The LPF 5 outputs a signal component related to the motion of the detection target included in the output signal of the detection circuit 4, and the cutoff frequency is a modulation circuit in order to remove the modulation component of the transmission signal included in the output signal of the detection circuit 4. Since it is set lower than the modulation frequency at which modulation is performed in 2a, a signal higher than the cutoff frequency such as a modulation component does not appear in the output.
　検波回路４の出力信号に含まれている、ＬＰＦ５のカットオフ周波数より周波数の低い検出対象の動きに関連する信号成分よってＬＰＦ５を構成しているキャパシタが充電され、送信動作の時間経過後はＬＰＦ５の回路によって構成される放電経路や、ＬＰＦ５を構成している部品などの絶縁抵抗を経路とした漏れ電流などによって徐々に放電し出力が低下してゆく。 The capacitor constituting the LPF 5 is charged by the signal component related to the motion of the detection target having a frequency lower than the cut-off frequency of the LPF 5 included in the output signal of the detection circuit 4, and after the time of transmission operation, the LPF 5 The output gradually decreases due to a discharge path constituted by the above circuit, or a leakage current that takes the insulation resistance of a part or the like constituting the LPF 5 as a path.
　制御回路７が送受信部１０を制御し、一定の時間ｔ４の周期で送信動作と非送信動作を交互に繰り返すので、送信動作の頻度が一定に保たれ、平均送信電力の低下を抑制されている。そのため、一定の時間ｔ４の周期で、ＬＰＦ５を構成しているキャパシタが充電され、ＬＰＦ５の放電による出力の低下を防ぐことができるので、センシング機能の感度低下を抑制することができる。 Since the control circuit 7 controls the transmission / reception unit 10 and alternately repeats the transmission operation and the non-transmission operation at a constant time t4, the frequency of the transmission operation is kept constant, and the decrease in average transmission power is suppressed. . Therefore, the capacitor constituting the LPF 5 is charged at a constant time t4 period, and a decrease in output due to the discharge of the LPF 5 can be prevented, so that a decrease in sensitivity of the sensing function can be suppressed.
　図４は、検出対象の動きが検出される動作を説明する図である。図４（ａ）は検出対象の動きを表している。図４（ｂ）は通信センサ装置１００から送信される送信出力を表す図である。図４（ｃ）は通信センサ装置１００の送信出力と、送信信号が検出対象で反射された反射波受信信号の合成信号を検波回路４で検波した出力の信号を示す図である。図４（ｄ）は、図４（ｃ）の検波出力がＬＰＦ５に入力された際のＬＰＦ出力を示す図である。 FIG. 4 is a diagram illustrating an operation in which a motion of a detection target is detected. FIG. 4A shows the movement of the detection target. FIG. 4B is a diagram illustrating a transmission output transmitted from the communication sensor device 100. FIG. 4C is a diagram illustrating a transmission signal of the communication sensor device 100 and an output signal obtained by detecting the combined signal of the reflected wave reception signal in which the transmission signal is reflected by the detection target by the detection circuit 4. FIG. 4D is a diagram illustrating the LPF output when the detection output of FIG. 4C is input to the LPF 5.
　図４（ａ）のような動きをする検出対象に、通信センサ装置１００から送信された通信用送信信号および送信信号が図４（ｂ）に示すタイミングで送信され、送信中に検出対象で反射され、アンテナ１で受信された反射波受信信号と、送信波の一部が検波回路４に入力される。 The communication transmission signal and the transmission signal transmitted from the communication sensor device 100 are transmitted to the detection target moving as shown in FIG. 4A at the timing shown in FIG. 4B, and reflected by the detection target during transmission. Then, the reflected wave reception signal received by the antenna 1 and a part of the transmission wave are input to the detection circuit 4.
　送信波の位相に対する反射波受信信号の位相は、検出対象までの距離が変わることで変化するので、送信波の一部と反射波受信信号の合成信号はこの２つの信号の位相差によってその振幅が変化する。 Since the phase of the reflected wave reception signal with respect to the phase of the transmission wave changes as the distance to the detection target changes, the amplitude of the combined signal of a part of the transmission wave and the reflected wave reception signal depends on the phase difference between the two signals. Changes.
　送信波と反射波受信信号が同相（位相差が０度）のとき、合成信号の振幅が最大となり、逆相（位相差が１８０度）のき合成信号の振幅が最小となる。 When the transmitted wave and the reflected wave received signal are in phase (phase difference is 0 degree), the amplitude of the synthesized signal is maximized, and the amplitude of the synthesized signal is reversed when the phase is opposite (phase difference is 180 degrees).
　検波回路４では図４（ｃ）に示すように、入力された送信波の一部と反射波受信信号の合成信号を検波し、その振幅に対応した検波信号を出力する。 As shown in FIG. 4C, the detection circuit 4 detects a composite signal of a part of the input transmission wave and the reflected wave reception signal, and outputs a detection signal corresponding to the amplitude.
　検波回路４から出力された検波信号がＬＰＦ５に入力されると、図４(ｄ)に示すように検波信号の包絡線に沿った信号が得ることができる。 When the detection signal output from the detection circuit 4 is input to the LPF 5, a signal along the envelope of the detection signal can be obtained as shown in FIG.
　信号処理回路６で、ＬＰＦ５の出力信号を、増幅、サンプリング、ＡＤ変換、等の信号処理を行い、この信号を信号処理回路６あるいは制御回路７で、分析や特徴抽出などを行うことで、検出対象の動きを検知することができる。 The signal processing circuit 6 performs signal processing such as amplification, sampling, AD conversion, etc. on the output signal of the LPF 5, and the signal processing circuit 6 or the control circuit 7 performs analysis, feature extraction, or the like to detect this signal. The movement of the object can be detected.
　以上のように、制御回路７は送受信部１０を制御し、一定の周期で送信動作と非送信動作を交互に繰り返すので、送信動作の頻度を一定に保つことができ、平均送信電力の低下を抑制することができる。また制御回路７は、送信動作が、１回以上の反射波受信信号を得るための検知用送信動作と、データの送信を行うｎ回（ｎは自然数）の通信用送信動作とを交互に繰り返すように制御するので、通信用送信動作の頻度を低くすることができる。このため変調回路２ａや復調回路３ａを動作させる頻度を低くすることができるので、通信センサ装置１００の消費電力を低減させることができる。 As described above, the control circuit 7 controls the transmission / reception unit 10 and alternately repeats the transmission operation and the non-transmission operation at a constant cycle. Therefore, the frequency of the transmission operation can be kept constant, and the average transmission power can be reduced. Can be suppressed. The control circuit 7 alternately repeats a detection transmission operation for obtaining one or more reflected wave reception signals and n communication transmission operations for transmitting data (n is a natural number). Thus, the frequency of the communication transmission operation can be reduced. For this reason, since the frequency which operates the modulation circuit 2a and the demodulation circuit 3a can be made low, the power consumption of the communication sensor apparatus 100 can be reduced.
　制御回路７は、送信動作が１回以上の検知用送信動作と、１回の通信用送信動作とを交互に繰り返すように制御を行うことで、通信センサ装置の消費電力をさらに低減させることができる。 The control circuit 7 can further reduce the power consumption of the communication sensor device by performing control so that the transmission operation is one or more detection transmission operations and the one communication transmission operation are alternately repeated. it can.
　検知用送信動作は、通信用送信動作より短い時間としたので、一層通信センサ装置の消費電力を低減させることができる。 Since the detection transmission operation has a shorter time than the communication transmission operation, the power consumption of the communication sensor device can be further reduced.
　以上により、本発明の実施形態にかかる通信センサ装置１００によれば、センサの感度低下が少なく、消費電力を低減することができる通信センサ装置を提供することができる。 As described above, according to the communication sensor device 100 according to the embodiment of the present invention, it is possible to provide a communication sensor device that can reduce the sensitivity of the sensor and reduce the power consumption.
　以上のように、本発明の実施形態に係る通信センサ装置１００を具体的に説明したが、本発明は上記の実施形態に限定されるものではなく、要旨を逸脱しない範囲で種々変更して実施することが可能である。例えば次のように変形して実施することができ、これらの実施形態も本発明の技術的範囲に属する。 As described above, the communication sensor device 100 according to the embodiment of the present invention has been specifically described. However, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. Is possible. For example, the present invention can be modified as follows, and these embodiments also belong to the technical scope of the present invention.
　（１）本実施形態において、通信センサ装置は検出対象から離れている図を示して説明を行ったが、検出対象の体動などを検出するために携行あるいは装着されていても良い。 (1) In the present embodiment, the communication sensor device has been described with reference to a drawing away from the detection target. However, the communication sensor device may be carried or worn to detect the body movement of the detection target.
　（２）本実施形態において、通信用送信動作が検知用送信動作４回毎に１回行われる例を示して説明したが、検知用送信動作は１回以上であれば良く、使用される用途や目的によって頻度を適宜変更して実施しても良い。 (2) In the present embodiment, the example in which the communication transmission operation is performed once every four detection transmission operations has been described. However, the detection transmission operation may be performed once or more, and is used. The frequency may be appropriately changed according to the purpose.
　（３）本実施形態において、通信用送信動作が検知用送信動作４回毎に１回行われる例を示して説明したが、通信用送信動作は１回より多くても良く、使用される用途や目的によって頻度を適宜変更して実施しても良い。 (3) In the present embodiment, the example in which the communication transmission operation is performed once every four detection transmission operations has been described. However, the communication transmission operation may be performed more than once and used. The frequency may be appropriately changed according to the purpose.
　（４）本実施形態において、通信用送信動作のすぐ後に受信動作を行う動作例を示して説明を行ったが、受信動作を行うタイミングは検知用送信動作の間に行われるようにしても良い。 (4) In this embodiment, an example of performing the reception operation immediately after the communication transmission operation has been described. However, the timing of performing the reception operation may be performed during the detection transmission operation. .
　１　　　アンテナ
　２　　　送信回路
　２ａ　　変調回路
　３　　　受信回路
　３ａ　　復調回路
　４　　　検波回路
　５　　　ローパスフィルタ（ＬＰＦ）
　６　　　信号処理回路
　７　　　制御回路
　８　　　電源回路
　１０　　送受信部
　２０　　検知部
　１００　通信センサ装置
　２００　通信相手 DESCRIPTION OF SYMBOLS 1 Antenna 2 Transmission circuit 2a Modulation circuit 3 Reception circuit 3a Demodulation circuit 4 Detection circuit 5 Low-pass filter (LPF)
6 Signal Processing Circuit 7 Control Circuit 8 Power Supply Circuit 10 Transmission / Reception Unit 20 Detection Unit 100 Communication Sensor Device 200 Communication Partner

Claims (3)

  1. 　送信信号を放射し、通信相手からの通信信号と検出対象からの反射波である反射波受信信号を受信するアンテナと、
    　前記アンテナに接続され通信を行うため、変調回路を有する送信回路と、復調回路を有する受信回路と、を備えた送受信部と、
    　前記送受信部に接続され、前記送受信部を制御する制御回路と、
    　前記送信回路から前記アンテナを介して前記送信信号を送信中に、前記送信信号の一部と前記アンテナで受信された前記反射波受信信号との合成信号を検波する検波回路と、
    　前記検波回路に接続され、カットオフ周波数が前記変調回路で変調を行う変調周波数より低く設定されたローパスフィルタと、
    　前記ローパスフィルタから出力される信号を処理する信号処理回路と、を有し、検出対象の動きを検知可能な通信センサ装置であって、
    　前記制御回路は前記送受信部を制御し、一定の周期で送信動作と非送信動作を交互に繰り返すとともに、前記送信動作は、１回以上の前記反射波受信信号を得るための検知用送信動作と、データの送信を行うｎ回（ｎは自然数）の通信用送信動作とを交互に繰り返すことを特徴とする通信センサ装置。     An antenna that radiates a transmission signal and receives a communication signal from a communication partner and a reflected wave reception signal that is a reflected wave from a detection target;
    A transmission / reception unit including a transmission circuit having a modulation circuit and a reception circuit having a demodulation circuit to communicate with the antenna;
    A control circuit connected to the transceiver unit for controlling the transceiver unit;
    A detection circuit for detecting a combined signal of a part of the transmission signal and the reflected wave reception signal received by the antenna during transmission of the transmission signal from the transmission circuit via the antenna;
    A low-pass filter connected to the detection circuit, wherein a cutoff frequency is set lower than a modulation frequency at which modulation is performed by the modulation circuit;
    A signal processing circuit for processing a signal output from the low-pass filter, and a communication sensor device capable of detecting a motion of a detection target,
    The control circuit controls the transmission / reception unit, alternately repeats a transmission operation and a non-transmission operation at a constant period, and the transmission operation includes a detection transmission operation for obtaining one or more reflected wave reception signals. A communication sensor device characterized by alternately repeating data transmission operations of n times (n is a natural number).
  2. 　前記送信動作は、１回以上の前記検知用送信動作と、１回の前記通信用送信動作とを交互に繰り返すことを特徴とする請求項１記載の通信センサ装置。 The communication sensor device according to claim 1, wherein the transmission operation alternately repeats one or more detection transmission operations and one communication transmission operation.
  3. 　前記検知用送信動作は、前記通信用送信動作より短い時間であることを特徴とする請求項１または２に記載の通信センサ装置。 The communication sensor device according to claim 1 or 2, wherein the detection transmission operation has a shorter time than the communication transmission operation.
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