JP2015205045A - Radio wave sensor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio wave sensor device that can simultaneously detect multiple kinds of information in a simple configuration.SOLUTION: A radio wave sensor device 1 outputs first and second transmission signals S1, S2separated by one octave or more and becoming different frequencies f1, f2 to each other from a multiband transmitting antenna 6, and receives the signals by a multiband receiving antenna 7. A receiving circuit 9 performs mixing between a first synchronizing signal S1synchronized with the first transmission signal S1and a first received signal S1, and outputs a first composite signal S1. Also, the receiving circuit 9 performs mixing between a second synchronizing signal S2synchronized with the second transmission signal S2and a second received signal S2, and outputs a second composite signal S2. A detection circuit 12 simultaneously obtains different two pieces of information in an object O to be measured based on the first detection signal and the second detection signal.

Description

  The present invention relates to a radio wave sensor device suitable for measuring various types of information on an object to be measured.

  In general, for example, a radio wave sensor device for measuring a heartbeat of a human body is known. In such a conventional radio wave sensor device, a human body is irradiated with microwaves, and a heartbeat is measured based on a reflected wave or a transmitted wave from the human body (see, for example, Patent Documents 1, 2, 3, and 4). .

JP 2013-153783 A JP 2006-55504 A JP 2014-307553 A JP 2011-50604 A

  The radio wave sensor devices described in Patent Documents 1 to 4 measure heartbeats using microwaves in a single frequency band. For this reason, reflected waves and transmitted waves from the human body may contain signal components due to body movement and breathing in addition to heartbeat signal components, and it is difficult to separate such signal components other than heartbeats. There is. As a result, there is a problem that a signal processing circuit for extracting a heartbeat signal component becomes complicated in order to improve the heartbeat detection accuracy.

  Moreover, the radio wave sensor device is applicable not only to a living body but also to the state measurement of a structure such as a bridge or a tunnel. However, when the state of the structure is measured using radio waves of a single frequency band, for example, it is not possible to simultaneously detect a plurality of different types of information such as the surface state and the internal state of the structure. There is also.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a radio wave sensor device that can simultaneously detect a plurality of types of information on a measurement object with a simple configuration. is there.

  In order to solve the above-described problem, the invention of claim 1 is directed to a transmission circuit that generates first and second transmission signals having different frequencies apart from each other by one octave or more, and the first and second transmission circuits connected to the transmission circuit. A multiband transmission antenna that outputs a second transmission signal toward the object to be measured; and a multiband reception antenna that receives a signal obtained by reflecting or transmitting the first and second transmission signals from the object to be measured; A diplexer for separating a first reception signal corresponding to the first transmission signal and a second reception signal corresponding to the second transmission signal from a signal received by the multiband reception antenna; A signal synchronized with the first transmission signal and the first reception signal are mixed to output a first mixed signal, and a signal synchronized with the second transmission signal is mixed with the second reception signal. Second It has a configuration that includes a receiving circuit for outputting a focus signal.

  According to a second aspect of the present invention, the multiband transmitting antenna and the multiband receiving antenna are arranged at different positions across the object to be measured, and the first and second output from the multiband transmitting antenna are provided. Is transmitted through the object to be measured and is received by the multiband receiving antenna.

  According to a third aspect of the present invention, the multiband transmitting antenna and the multiband receiving antenna are constituted by a single multiband antenna that is used by both, and the first and second output from the multiband antenna. The transmission signal is reflected by the object to be measured and received by the multiband antenna.

  According to a fourth aspect of the present invention, the multiband transmitting antenna and the multiband receiving antenna are constituted by lens antennas.

  According to a fifth aspect of the present invention, the first transmission signal and the second transmission signal are set so that detection sensitivity is increased by different operations among a plurality of types of operations of a living body that is the measurement target. Based on the first reception signal corresponding to the first transmission signal and the second reception signal corresponding to the second transmission signal, the influence of one operation is reduced and the other operation is performed. A detection circuit for detecting is further provided.

  According to the first aspect of the present invention, the frequency differs between the first transmission signal and the second transmission signal by one octave or more. Therefore, for example, the reflectivity and transmittance of radio waves according to a plurality of types of information on the measurement object Can be different. In addition to this, since the frequency is different by 1 octave or more between the first reception signal corresponding to the first transmission signal and the second reception signal corresponding to the second transmission signal, both of them are used using a diplexer. It can be easily separated. For this reason, it is possible to separate and extract information on the object to be measured detected by the first received signal and information on the object to be measured detected by the second received signal, and perform complicated signal processing. It is possible to simultaneously obtain two different pieces of information on the object to be measured without performing.

  Further, the first and second transmission signals can be output to the object to be measured by a single multiband transmission antenna, and the first and second transmission signals are reflected or transmitted by the object to be measured. The received signal can be received by a single multiband receiving antenna. For this reason, compared with the case where a different antenna for every frequency is used, the structure of the whole apparatus can be simplified.

  According to the invention of claim 2, the multiband transmitting antenna and the multiband receiving antenna are arranged at different positions with the measurement object sandwiched therebetween. Thereby, the 1st, 2nd transmission signal which permeate | transmitted the inside of the to-be-measured object can be received with a multiband receiving antenna. At this time, the first transmission signal and the second transmission signal can have different radio wave transmittances with respect to the object to be measured. Therefore, the first and second signals are transmitted from the signal transmitted through the object to be measured. By separating the received signal, two different pieces of information on the object to be measured can be obtained.

  According to the invention of claim 3, the multiband transmitting antenna and the multiband receiving antenna are configured to be shared by a single multiband antenna. Accordingly, the multiband antenna can output the first and second transmission signals and can receive the first and second transmission signals reflected by the measurement object. At this time, the first transmission signal and the second transmission signal can be made to have different reflectances of radio waves with respect to the object to be measured, so that the first and second reception from the signal reflected by the object to be measured. By separating the signals, two different pieces of information on the object to be measured can be obtained. In addition, since the multiband antenna functions as both a multiband transmission antenna and a multiband reception antenna, these can be configured by a single multiband antenna, and the radio wave sensor device can be miniaturized.

  In addition, since the multiband transmission antenna and the multiband reception antenna are shared by a single multiband antenna, the transmission circuit that generates the first and second transmission signals and the reception that outputs the first and second mixed signals The circuit can be constituted by a transmission / reception circuit combining these. For this reason, the transmission circuit and the reception circuit can be easily synchronized as compared with the case where the transmission circuit and the reception circuit are provided separately.

  According to the invention of claim 4, the multiband transmitting antenna and the multiband receiving antenna are constituted by the lens antenna. Here, generally, low-frequency signals (radio waves) have a small propagation loss, and high-frequency signals tend to have a large propagation loss. On the other hand, lens antennas tend to have low directivity and gain for low-frequency signals and high directivity and gain for high-frequency signals. For this reason, even when a difference in propagation loss occurs between the first and second transmission signals due to the difference in frequency between the first and second transmission signals by one octave or more, the directivity and gain characteristics of the lens antenna Therefore, such a difference in propagation loss can be reduced. As a result, when the first and second transmission signals are output from the lens antenna, one of the first and second transmission signals is not significantly attenuated, and the first and second transmission signals are sufficient. The object to be measured can be irradiated with a high signal intensity. Further, when the lens antenna receives a signal reflected or transmitted by the object to be measured, either one of the first and second received signals is not greatly attenuated, and the first and second received signals are not attenuated. Different information on the object to be measured can be obtained.

  According to the invention of claim 5, the first transmission signal and the second transmission signal are set so that the detection sensitivity becomes high by different operations of the living body. For this reason, the operation | movement of the biological body with high detection sensitivity with a 1st transmission signal falls in a detection sensitivity with a 2nd transmission signal. Similarly, the operation of the living body having high detection sensitivity with the second transmission signal has low detection sensitivity with the first transmission signal. Therefore, for example, even when a signal component of an unnecessary operation is mixed in the second reception signal corresponding to the second transmission signal, the detection circuit detects the first transmission from the information detected using the second reception signal. Information detected using the first received signal corresponding to the signal can be removed. Thereby, unnecessary movement information can be omitted, and biological movement information having high detection sensitivity can be extracted from the second transmission signal. As a result, it is possible to obtain biological operation information with higher accuracy than when a single frequency signal is used.

It is a circuit diagram showing the whole electric wave sensor device composition by a 1st embodiment. It is a flowchart which shows the heartbeat detection process of the detection circuit by 1st Embodiment. In 1st Embodiment, it is explanatory drawing which shows typically the relationship between the 1st, 2nd detection signal waveform and a noise removal signal waveform. It is a circuit diagram which shows the whole structure of the electromagnetic wave sensor apparatus by 2nd Embodiment. It is the schematic which shows the whole structure of the electromagnetic wave sensor apparatus by 3rd Embodiment. It is the schematic which shows the whole structure of the electromagnetic wave sensor apparatus by 4th Embodiment. It is the schematic which shows the whole structure of the electromagnetic wave sensor apparatus by 5th Embodiment.

  Hereinafter, a radio wave sensor device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 shows a radio wave sensor device 1 according to a first embodiment. The radio wave sensor device 1 includes a transmission circuit 3, a multiband transmission antenna 6, a multiband reception antenna 7, a reception diplexer 8, a reception circuit 9, and the like. In the present embodiment, a case where a heartbeat of a human body as the measurement target object O is measured using the radio wave sensor device 1 will be described as an example.

First, a circuit on the multiband transmission antenna 6 side that transmits the first and second transmission signals S1 _t and S2 _t will be described.

Reference signal generator 2, as a reference signal _{S B} for each oscillator 4 _1, 4 _2, 10 _1, 10 ₂ of the transmission of the later circuit 3 and the receiving circuit 9, for example, outputs a signal of 10MHz or the like.
The reference signal _{S B,} the first, second transmission signal _S1 t, S2 _t and a first, a serving as a reference signal for synchronizing the second synchronizing signal S1 _ref, S2 _ref.

The transmission circuit 3 includes oscillators 4 ₁ and 4 ₂ that generate first and second transmission signals S1 _t and S2 _t for the object to be measured O. Input side of the oscillator 4 ₁ is connected to a reference signal generator 2, the output side of the oscillator 4 ₁ is connected to the transmission diplexer 5 below. Input side of the oscillator 4 ₂ is connected to a reference signal generator 2, the output side of the oscillator 4 ₂ is connected to the transmission diplexer 5.

Oscillator ₄ 1, _{4 2,} a reference signal _{S B} to the reference signal generator 2 is generated up-converted, to generate first a high frequency signal, the second transmission signal _S1 t, S2 _t respectively. Here, the frequency f1 of the first transmission signal S1 _{t and} the frequency f2 of the second transmission signal S2 _t are different from each other and set to a value separated by one octave or more. Specifically, the frequency f1 of the first transmission signal S1 _t is set to 10 GHz, for example. On the other hand, the frequency f2 of the second transmission signal S2 _t is set to, for example, 24 GHz as a frequency that is one octave or more higher than the frequency f1 of the first transmission signal S1 _t . As a result, the first and second transmission signals S1 _t and S2 _t can have different radio wave reflectivities and transmissivities with respect to the object to be measured O.

Further, the first and second transmission signals S1 _t and S2 _t are set so that the detection sensitivity is increased by different operations among the plurality of types of operations of the measurement target object O (human body). Specifically, the first transmission signal S1 _t has a high detection sensitivity mainly with respect to human body movement and respiration, and the second transmission signal S2 _t has a detection sensitivity with respect to changes including human body movement, respiration, and heartbeat. Is set higher. The frequencies f1 and f2 may be set to 24 GHz and 60 GHz. For example, the frequencies f1 and f2 are appropriately set according to the size of the measurement target object O, the constituent material, the measurement operation, and the like.

The transmission diplexer 5 is provided between the transmission circuit 3 and a multiband transmission antenna 6 to be described later, synthesizes the first and second transmission signals S1 _t and S2 _t , and outputs them to the multiband transmission antenna 6. . The transmission diplexer 5 includes a low-pass filter 5A and a high-pass filter 5B.

Low-pass filter 5A has an input side connected to the oscillator 4 _1, the output side is connected to the multi-band transmission antenna 6. High-pass filter 5B has an input side connected to the oscillator 4 _2, the output side is connected to the multi-band transmission antenna 6. The cutoff frequencies of these filters 5A and 5B are set to values between the frequencies f1 and f2. Thus, the low-pass filter 5A blocks the leakage of the second transmission signal S2 _t toward the oscillator _{4 1} side. Similarly, the high-pass filter 5B interrupts the leakage of the first transmission signal S1 _t toward the oscillator _{4 2} side.

The multiband transmission antenna 6 can radiate both the first and second transmission signals S1 _t and S2 _t , and is configured by various antennas such as a patch antenna and a slot antenna. The input side of the multiband transmission antenna 6 is connected to the transmission diplexer 5 on the transmission circuit 3 side, and outputs the first and second transmission signals S1 _t and S2 _t toward the object to be measured O. Here, the multiband transmission antenna 6 irradiates the first and second transmission signals S1 _t and S2 _t to the range if the region in which the object to be measured O is detected is a predetermined range. It is preferable to set the directivity of the multiband transmission antenna 6. In this case, unnecessary electromagnetic wave radiation can be suppressed and loss can be reduced.

Next, a circuit on the multiband receiving antenna 7 side that receives the first and second received signals S1 _r and S2 _r will be described.

The multiband receiving antenna 7 is configured in the same manner as the multiband transmitting antenna 6, and is arranged at different positions with the measurement object O interposed therebetween. The multiband receiving antenna 7 receives signals (transmitted waves) when the object to be measured O transmits the first and second transmission signals S1 _t and S2 _t . At this time, the multiband receiving antenna 7 can receive the first and second transmission signals S1 _t and S2 _t transmitted through the object to be measured O as the first and second reception signals S1 _r and S2 _r. It is composed of various antennas. The output side of the multiband receiving antenna 7 is connected to a receiving diplexer 8 described later. Here, similarly to the multiband transmission antenna 6, the multiband reception antenna 7 preferably sets the directivity of the multiband reception antenna 7 in the range of the region in which the object to be measured O is detected.

In this case, the first reception signal S1 _r corresponds to the first transmission signal S1 _t , and the second reception signal S2 _r corresponds to the second transmission signal S2 _t . For this reason, the first and second received signals S1 _r and S2 _r are Doppler due to the body movement, heartbeat, and the like of the object to be measured O at the frequencies f1 and f2 of the first and second transmission signals S1 _t and S2 _t. The signal is obtained by adding the frequencies f1d and f2d.

  The reception diplexer 8 is provided between the multiband reception antenna 7 and the reception circuit 9 and is configured in the same manner as the transmission diplexer 5. That is, the reception diplexer 8 includes a low-pass filter 8A and a high-pass filter 8B.

Low pass filter 8A, the input side is connected to a multi-band receiving antenna 7, the output side is connected to the mixer 11 ₁ for detecting a first received signal S1 _r. High-pass filter 5B has an input side connected to the multi-band receiving antenna 7, the output side is connected to the mixer 11 ₂ for detecting the second received signal S2 _r. The cutoff frequencies of these filters 8A and 8B are set to values between the frequencies f1 and f2. Thereby, the reception diplexer 8 receives the first reception signal S1 _r corresponding to the first transmission signal S1 _t and the second reception signal corresponding to the second transmission signal S2 _t from the signal received by the multiband reception antenna 7. of the received signal S2 to separate the _r, the first received signal S1 _r is supplied to a mixer 11 _1, and supplies the second received signal S2 _r to the mixer 11 _2.

The receiving circuit 9 includes oscillators 10 ₁ and 10 ₂ and mixers 11 ₁ and 11 ₂ . The input side of the reception circuit 9 is connected to the reception diplexer 8, and the output side of the reception circuit 9 is connected to a detection circuit 12 described later. The reception circuit 9 mixes the first synchronization signal S1 _ref synchronized with the first transmission signal S1 _t and the first reception signal S1 _r, and outputs a first mixed signal S1 _m . The reception circuit 9 mixes the second synchronization signal S2 _ref synchronized with the second transmission signal S2 _t and the second reception signal S2 _r, and outputs a second mixed signal S2 _m .

The oscillators 10 ₁ and 10 ₂ are configured in the same manner as the oscillators 4 ₁ and 4 ₂ . Input side of the oscillator 10 ₁ is connected to a reference signal generator 2, the output side of the oscillator 10 ₁ is connected to the mixer 11 _1. Input side of the oscillator 10 ₂ is connected to a reference signal generator 2, the output side of the oscillator 10 ₂ is connected to the mixer 11 _2. Oscillator ₁₀ 1, 10 _2, the reference signal _{S B} outputted from the reference signal generator 2 up-converts, first, first, second synchronizing signal synchronized with the second transmission signal _S1 t, S2 _t S1 _ref and S2 _ref are generated respectively. Therefore, the first synchronization signal S1 _ref has the same frequency f1 as the first transmission signal S1 _t, and the second synchronization signal S2 _ref has the same frequency f2 as the second transmission signal S2 _t. ing.

The mixers 11 ₁ and 11 ₂ are provided between the receiving diplexer 8 and the oscillators 10 ₁ and 10 ₂ , respectively. The mixer 11 _1, and mixing the first received signal S1 _r received by the first synchronization signal S1 _ref multiband receiving antenna 7 according to the oscillator 10 _1, the detection circuit described later a first mixed signal S1 _m of Output to 12. Further, the mixer 11 _2, by mixing the second received signal S2 _r received by the second synchronizing signal S2 _ref multiband receiving antenna 7 by oscillator 10 _2, below the second mixing signal S2 _m of Output toward the detection circuit 12.

The detection circuit 12 is connected to the mixers 11 ₁ and 11 ₂ and receives the first and second mixed signals S1 _m and S2 _m . The detection circuit 12 is configured by a microcomputer or the like, for example, and executes the heartbeat detection process shown in FIG. Specifically, the detection circuit 12 detects the first and second detection signals S1 _d and S2 _d from the first and second mixed signals S1 _m and S2 _m . The first detection signal S1 _d is, for example, a signal having a Doppler frequency f1d that is generated when the first transmission signal S1 _t passes through the object to be measured O. The second detection signal S2 _d is, for example, the second transmission signal S2 _t is a signal of Doppler frequency f2d occurring when transmitted through the object to be measured O. Then, the detection circuit 12, the second detection signal S2 _d by removing the component corresponding to the first detection signal S1 _d, and detects the noise cancellation signal S _nr, heart rate by using the noise eliminating signal S _nr Is detected.

  Next, the operation of the radio wave sensor device 1 according to the present embodiment will be described.

First, the reference signal generator 2, first, than the frequency f1, f2 of the second transmission signal _S1 t, S2 _t generates a reference signal _{S B} of the low-frequency, each oscillator _{4 1,} 4 2, 10 ₁ and 10 ₂ are output. Reference signal _{S B} outputted to the oscillator ₄ 1, _{4 2} of the transmission circuit 3, in each oscillator ₄ 1, _{4 2} upconverted, first, the second transmission signal _S1 t, S2 _t is generated. In this case, the frequency f1 of the first transmission signal S1 _t is set to, for example, 10 GHz, and the frequency f2 of the second transmission signal S2 _t is set to, for example, 24 GHz. Thus, the frequencies f1 and f2 of the first and second transmission signals S1 _t and S2 _t are set to values separated by one octave or more. The reference signal _{S B} outputted to the oscillator ₁₀ 1, 10 ₂ of the receiving circuit 9, at each oscillator ₁₀ 1, 10 ₂ is up-converted, first, in synchronization with the second transmission signal _S1 t, S2 _t The first and second synchronization signals S1 _ref and S2 _ref having the frequencies f1 and f2 are generated.

The first and second transmission signals S1 _t and S2 _t generated in the transmission circuit 3 are output to the transmission diplexer 5. The transmission diplexer 5 combines the first and second transmission signals S1 _t and S2 _t and supplies them to the multiband transmission antenna 6.

The multiband transmission antenna 6 irradiates the measurement object O (human body) with the first and second transmission signals S1 _t and S2 _t input from the transmission diplexer 5. The first and second transmission signals S1 _t and S2 _t transmitted through the object to be measured O are received by the multiband reception antenna 7 as the first and second reception signals S1 _r and S2 _r. . At this time, since the first transmission signal S1 _t has a low frequency and a long wavelength, the first transmission signal S1 _t is likely to be affected by an operation in which a relatively large part is displaced, such as body movement and respiration. Therefore, the first transmission signal S1 _t transmitted through the object to be measured O is added with the component of the Doppler frequency f1d due to such an operation, and the first reception in which the frequency f1 and the Doppler frequency f1d are added. It is received as the signal S1 _r.

On the other hand, the second transmission signal S2 _t, because the wavelength at a high frequency is shorter, for example body movement, in addition to the operation relatively large sites, such as breathing or the like is displaced is relatively small sites, such as heart rate, such as displacement Also affected by the movement. For this reason, the second transmission signal S2 _t transmitted through the object to be measured O is added with the component of the Doppler frequency f2d by such an operation, and the second reception in which the frequency f2 and the Doppler frequency f2d are added. It is received as a signal S2 _r.

The first and second received signals S1 _r and S2 _r including components of Doppler frequencies f1d and f2d are received by the multiband receiving antenna 7 and supplied to the receiving diplexer 8. The reception diplexer 8 separates the first and second reception signals S1 _r and S2 _r , supplies the first reception signal S1 _r to the mixer 11 _1, and supplies the second reception signal S2 _r to the mixer 11 ₂ . Supply.

The mixer 11 _1, and mixing the first synchronization signal S1 _ref first reception signal S1 _r, to generate a first mixed signal S1 _m in. In this case, the mixer 11 _1, a first synchronizing signal S1 _ref frequency f1 outputs the sum or difference frequency between the first received signal S1 _r of frequency (f1 + f1d) as the first mixed signal S1 _m To do. Meanwhile, the mixer 11 _2, similar to the mixer 11 _1, and the frequency f2 of the second synchronizing signal S2 _ref of the second received signal S2 _r frequency (f2 + f2d) and the frequency of the sum or difference the second of and outputs as a mixed signal S2 _m. The first and second mixed signals S1 _m and S2 _m output from the mixers 11 ₁ and 11 ₂ are input to the detection circuit 12.

  Next, the operation of the heartbeat detection process by the detection circuit 12 will be described with reference to FIGS.

First, in step 1, for detecting a first detection signal S1 _d from the first mixed signal S1 _m input from the mixer 11 _1. The first detection signal S1 _d is obtained by, for example, phase detection or envelope detection (amplitude detection) of the first mixed signal S1 _m , and the first detection signal S1 _d is obtained from the first synchronization signal S1 _ref and the first reception signal S1 _r . It is a signal according to the difference. At this time, since the first transmission signal S1 _t has a low frequency, the first detection signal S1 _d is a signal corresponding to, for example, the Doppler frequency f1d due to body movement and respiration of the measurement target object O.

Next, in step 2, to detect the second detection signal S2 _d from the second mixed signal S2 _m input from the mixer 11 _2. The second detection signal S2 _d, the second mixed signal S2 _m, for example phase detection or envelope detection are those (amplitude detection) was, with the second synchronizing signal S2 _ref and a second received signal S2 _r It is a signal according to the difference. At this time, since the second transmission signal S2 _t has a high frequency, the second detection signal S2 _d is a signal corresponding to the Doppler frequency f2d due to body movement, breathing, and heartbeat of the measurement target object O, for example.

Next, in step 3, the first and second detection signals S1 _d and S2 _d are sampled. Sampling may be performed by, for example, an A / D converter or software processing.

Here, as shown in FIG. 3 (a), the first detection signal S1 _d body motion of the object to be measured O, since then corresponds to the Doppler frequency f1d respiratory, the first detection signal S1 sampled _d is the waveform, as compared to the second detection signal S2 _d, the period is increased. Further, as shown in FIG. 3 (b), the second detection signal S2 _d body motion of the object to be measured O, respiration, because in corresponds to the Doppler frequency f2d by the heartbeat, the second detection signals sampled waveform S2 _d is a form of heart due to the characteristics of the object to be measured O is applied to the waveform of the first detection signal S1 _d.

In the subsequent step 4, a component corresponding to the first detection signal S1 _d is removed from the second detection signal S2 _d , and the noise removal signal S _nr is detected. Specifically, for example, as shown in FIG. 3C, the noise removal signal S _nr subtracts the value of the sampled first detection signal S1 _d from the value of the sampled second detection signal S2 _d. Is required. As a result, the noise removal signal S _nr is a component in which the component due to body movement and respiration corresponding to the first detection signal S1 _d is reduced and the component due to the heartbeat is extracted as compared with the second detection signal S2 _d. Become. The first and second detection signals S1 _d and S2 _d may be subtracted after their amplitudes are adjusted appropriately. Further, for example, body movement from the first detection signal S1 _d by filtering or the like, after extracting the components due to respiration, may be subtracted from the second detection signal S2 _d.

In step 5, the heartbeat is detected using the noise removal signal S _nr detected in step 4. For example, it is possible to measure the heart rate by detecting the peak number of the noise cancellation signal S _nr, it can measure the strength of the heartbeat by detecting the amplitude of the noise cancellation signal S _nr. Accordingly, based on the first received signal S1 _r and the second received signal S2 _r , the influence of body movement and breathing as one operation can be reduced and the heartbeat as the other operation can be detected. .

Thus, according to the first embodiment, the frequencies f1 and f2 of the first transmission signal S1 _t and the second transmission signal S2 _t are different from each other by one octave or more. The reflectivity and transmittance of radio waves can be made different according to the part displaced by breathing and the part displaced by heartbeat. In addition to this, the frequency (f1 + f1d,...) Is also between the first reception signal S1 _r corresponding to the first transmission signal S1 _t and the second reception signal S2 _r corresponding to the second transmission signal S2 _t . Since f2 + f2d) is different by one octave or more, the reception diplexer 8 can be used to easily separate the two. Therefore, the first received signal S1 body motion detected by _r, and the information of the breathing, can be extracted by separating the information of the heartbeat detected by the second receiving signal S2 _r, complicated signal Two different pieces of information on the object to be measured O can be obtained at the same time without performing processing.

In addition, the first and second transmission signals S1 _t and S2 _t can be output toward the object to be measured O by the single multiband transmission antenna 6, and the first and second transmission signals S1 _t , S2 _t can be received by the single multiband receiving antenna 7 through the object O to be measured. For this reason, compared with the case where a different antenna for every frequency is used, the structure of the whole apparatus can be simplified.

Further, the multiband transmitting antenna 6 and the multiband receiving antenna 7 are arranged at different positions with the object to be measured O interposed therebetween. Accordingly, the first and second transmission signals S1 _t and S2 _t transmitted through the object to be measured O can be received by the multiband receiving antenna 7. At this time, since the first and second received signals S1 _r and S2 _r received by the multiband receiving antenna 7 are transmitted waves transmitted through the human body, the first and second received signals S1 _r and S2 _r The motion of the human heart can be directly measured. For this reason, compared with the case where it measures using the reflected wave which the human body reflected, the detection sensitivity and detection accuracy of a heartbeat can be improved.

In addition, the first transmission signal S1 _t and the second transmission signal S2 _t were set so that the detection sensitivity was increased by different operations of the measurement target object O. That is, since the first transmission signal S1 _t has a low frequency and a long wavelength, the first transmission signal S1 _t is suitable for detection of body movement and respiration in which a large part is displaced, and the second transmission signal S2 _t has a high frequency and a short wavelength. It is suitable for detecting heartbeats in which displacement occurs at a small site. In consideration of this point, the first transmission signal S1 _t has high body motion and respiration detection sensitivity, and the second transmission signal S2 _t has high heartbeat detection sensitivity.

Therefore, the detection circuit 12 uses the second received signal S2 _r even when unnecessary signal components such as body movement and respiration are mixed in the second received signal S2 _r corresponding to the second transmitted signal S2 _t. By removing the information detected using the first received signal S1 _r corresponding to the first transmission signal S1 _{t from} the detected information, information on body motion, breathing, etc. is omitted, and the heart rate information is obtained. Can be extracted. As a result, it is possible to obtain heart rate information of the object to be measured O with higher accuracy than when a signal having a single frequency is used.

Further, the first radio wave sensor apparatus 1, since the radio wave of a second transmission signal S1 _t, S2 _t measures the heart rate by irradiating the human body is the measurement object O, and the radio wave sensor apparatus 1 directly to the human body There is no need for contact (non-contact) and no need to restrain the human body (non-restraint). For this reason, the noninvasive radio wave sensor apparatus 1 which does not give a stress and tension to a human body can be provided.

  Next, FIG. 4 shows a radio wave sensor device according to a second embodiment of the present invention. A feature of the second embodiment resides in that a multiband transmission antenna and a multiband reception antenna are combined with a single multiband antenna, and a reflected wave from the object to be measured O is measured. Note that in the second embodiment, the same components as those in the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted.

  The radio wave sensor device 21 according to the second embodiment includes a transmission circuit 3, a reception circuit 23, a diplexer 27, a multiband antenna 28, and the like. In the present embodiment, a case where a heartbeat of a human body as the measurement target object O is measured using the radio wave sensor device 21 will be described as an example.

The transmission / reception circuit 22 includes a reference signal generator 2, a transmission circuit 3, a reception circuit 23, a diplexer 27, and the like. The transceiver circuit 22 generates the first, second transmission signal _S1 t, S2 _t upconverts the reference signal _{S B} generated by the reference signal generator 2 at each oscillator ₄ 1, _{4 2} transmission circuit 3 To do. The first and second transmission signals S1 _t and S2 _t are supplied to a multiband antenna 28, which will be described later, and transmitted from the multiband antenna 28 toward the object to be measured O. The transmission / reception circuit 22 mixes the first and second reception signals S1 _r and S2 _r received by the multiband antenna 28 with the first and second synchronization signals S1 _ref and S2 _ref by the reception circuit 23, It outputs to the detection circuit 29 mentioned later.

The reception circuit 23 is provided between the transmission circuit 3 and a diplexer 27 described later. The receiving circuit 23 includes directional couplers 24 ₁ , 24 ₂ , 25 ₁ , 25 ₂ and mixers 26 ₁ , 26 ₂ .

The directional couplers 24 ₁ and 24 ₂ are respectively provided between the oscillators 4 ₁ and 4 ₂ and directional couplers 25 ₁ and 25 ₂ described later. The directional coupler 24 _1, a first transmission signal S1 _t generated by the transmission circuit 3, and partitioned between circuit of the multi-circuit band antenna 28 side and the mixer 26 ₁ side. Thus, the directional coupler 24 ₁ transmits the first transmission signal S1 _t from the oscillator 4 ₁ toward the multiband antenna 28, and also transmits the first transmission signal S1 from the oscillator 4 ₁ toward the mixer 26 _{1. t} is transmitted as the first synchronization signal S1 _ref . On the other hand, the directional coupler 24 _2, the second transmission signal S2 _t generated by the transmission circuit 3, and partitioned between circuit of the multi-circuit band antenna 28 side and the mixer 26 _2. As a result, the directional coupler 24 ₂ transmits the second transmission signal S2 _t from the oscillator 42 ₂ to the multiband antenna 28, and also transmits the second transmission signal S2 from the oscillator 4 ₂ toward the mixer 26 _{2. t} is transmitted as the second synchronization signal S2 _ref .

Here, the input side of the directional coupler 24 ₁ is connected to the oscillator 4 _1, the output side is connected to the directional coupler 25 ₁ and the mixer 26 _1. The input side of the directional coupler 24 ₂ is connected to the oscillator 4 _2, output is connected to the directional coupler 25 ₂ and the mixer 26 _2.

The directional couplers 25 ₁ and 25 ₂ are provided between the directional couplers 24 ₁ and 24 ₂ and the diplexer 27, respectively. The directional coupler 25 _1, transmits toward the first transmission signal S1 _t generated by the transmission circuit 3 to the multi-band antenna 28. Further, the directional coupler 25 _1, the first received signal S1 _r received by the multi-band antenna 28 is blocked from leaking to the circuit of the directional coupler 24 ₁ side, a first received signal S1 _r transmitting toward the mixer 26 _1. On the other hand, the directional coupler 25 ₂ transmits toward the second transmission signal S2 _t generated by the transmission circuit 3 to the multi-band antenna 28. Further, the directional coupler 25 _2, blocks the second received signal S2 _r received by the multi-band antenna 28 from leaking to the circuit of the directional coupler 24 ₂ side, the second received signal S2 _r transmitting toward the mixer 26 _2.

Here, the directional coupler 25 _1, and the directional coupler 24 ₁ and the mixer 26 ₁ and diplexer 27 are connected. Further, the directional coupler 25 _2, and the directional coupler 24 ₂ and mixer 26 ₂ and the diplexer 27 is connected. For example, a circulator may be used instead of the directional couplers 25 ₁ and 25 ₂ .

The mixers 26 ₁ , 26 ₂ are configured in substantially the same manner as the mixers 11 ₁ , 11 ₂ according to the first embodiment, and include directional couplers 24 ₁ , 24 ₂ , 25 ₁ , 25 ₂ and a detection circuit 29, respectively. It is provided in between. The mixer 26 _1, oscillator ₄ by mixing the first received signal S1 _r received by _one of the first synchronization signal S1 _ref multiband antenna 28, toward the first mixing signal S1 _m of the detection circuit 29 Output. Further, the mixer 26 _2, the oscillator ₄ by mixing a second received signal S2 _r received by ₂ by the second synchronizing signal S2 _ref multiband antenna 28, the detection circuit 29 of the second mixing signal S2 _m of Output to. Here, the input side of the mixer 26 ₁ is connected directional coupler 24 _1, 25 _1, the detection circuit 29 is connected to the output side. Further, directional couplers 24 ₂ and 25 ₂ are connected to the input side of the mixer 26 ₂ , and a detection circuit 29 is connected to the output side.

The diplexer 27 is provided between the receiving circuit 23 and a multiband antenna 28 described later. The diplexer 27 combines the first and second transmission signals S1 _t and S2 _t and outputs them to the multiband antenna 28. The diplexer 27 also includes a first reception signal S1 _r corresponding to the first transmission signal S1 _t from a signal received by the multiband antenna 28, and a second reception signal S2 corresponding to the second transmission signal S2 _{t. r} is separated.

The diplexer 27 includes a low-pass filter 27A and a high-pass filter 27B. Low-pass filter 27A is connected to the directional coupler 25 ₁ and the multi-band antenna 28. The high pass filter 27 </ _b > B is connected to the directional coupler 252 and the multiband antenna 28. The cutoff frequency of these filters 27A and 27B is set to a value between the frequencies f1 and f2. Thus, the low-pass filter 27A is blocking the second transmission signal S2 _t and the second reception signal S2 _r leakage towards the directional coupler 25 _1. Similarly, high pass filter 27B interrupts the first transmission signal S1 _t and the first received signal S1 _r leakage towards the directional coupler 25 _2.

The multiband antenna 28 includes various antennas capable of transmitting and receiving the first and second transmission signals S1 _t and S2 _t and the first and second reception signals S1 _r and S2 _r . In other words, the multiband transmission antenna and the multiband reception antenna are configured by a single multiband antenna 28 that is shared by both. The multiband antenna 28 is connected to the diplexer 27 on the transmission / reception circuit 22 side, and outputs the first and second transmission signals S1 _t and S2 _t toward the object to be measured O. Further, the multiband antenna 28 receives signals (reflected waves) when the object to be measured O reflects the first and second transmission signals S1 _t and S2 _t . At this time, the multiband antenna 28 receives the first and second transmission signals S1 _t and S2 _t reflected by the object to be measured O as the first and second reception signals S1 _r and S2 _r . Here, if the area where the object to be measured O is detected is a predetermined range, the multiband antenna 28 irradiates the range with the first and second transmission signals S1 _t and S2 _t. The directivity of the multiband antenna 28 is preferably set so that the first and second received signals S1 _r and S2 _r are received.

The detection circuit 29 is connected to the mixers 26 ₁ and 26 ₂ and receives the first and second mixed signals S1 _m and S2 _m . The detection circuit 29 is configured in substantially the same manner as the detection circuit 12 of the first embodiment, and the first and second detection signals S1 _d and S2 _d are obtained from the first and second mixed signals S1 _m and S2 _m . To detect. The first detection signal S1 _d is, for example, a signal of the Doppler frequency f1d occurring when the first transmission signal S1 _t reflects an object to be measured O. The second detection signal S2 _d is, for example, a signal of the Doppler frequency f2d that occurred when the second transmission signal S2 _t reflects an object to be measured O. Then, the detection circuit 29, the second detection signal S2 _d by removing the component corresponding to the first detection signal S1 _d, and detects the noise cancellation signal S _nr, heart rate by using the noise eliminating signal S _nr Is detected.

Thus, in the second embodiment, it is possible to obtain substantially the same operational effects as those in the first embodiment. According to the radio wave sensor device 21 of the second embodiment, the multiband transmitting antenna and the multiband receiving antenna are combined with the single multiband antenna 28. Thus, the multi-band antenna 28, first, outputs a second transmission signal _S1 t, S2 _t, first the body is reflected as the object to be measured O, the second transmission signal _S1 t, S2 _t can be received. At this time, in the first transmission signal S1 _t and the second transmission signal S2 _t , the reflectance of the radio wave according to the part to be measured of the object to be measured O that is displaced by body movement and breathing and the part that is displaced by the heartbeat. Etc. can be made different. As a result, by separating the first and second received signals S1 _r and S2 _r from the signal reflected on the object to be measured O, information on body movement and breathing on the object to be measured O and information on the heart rate are obtained. Can be obtained.

  Moreover, since the multiband antenna 28 functions as both a multiband transmission antenna and a multiband reception antenna, these can be comprised by the single multiband antenna 28, and the electromagnetic wave sensor apparatus 21 can be reduced in size. it can.

Furthermore, since the multiband transmission antenna and the multiband reception antenna are shared by the single multiband antenna 28, the transmission circuit 3 for generating the first and second transmission signals S1 _t and S2 _t and the first and second The receiving circuit 23 that outputs the mixed signals S1 _m and S2 _m can be constituted by a transmitting / receiving circuit 22 that combines them. For this reason, compared with the case where the transmission circuit and the reception circuit are provided separately, the transmission circuit 3 and the reception circuit 23 can be easily synchronized.

  Next, FIG. 5 shows a radio wave sensor device according to a third embodiment of the present invention. The feature of the third embodiment resides in that the multiband antenna is constituted by a lens antenna. Note that in the third embodiment, the same components as those in the first and second embodiments described above are denoted by the same reference numerals, and the description thereof is omitted.

  The radio wave sensor device 31 according to the third embodiment is configured similarly to the radio wave sensor device 21 according to the second embodiment. The radio wave sensor device 31 includes a transmission / reception circuit 22, a detection circuit 29, a lens antenna 32, and the like.

The lens antenna 32 is connected to the transmission / reception circuit 22 and includes a primary radiator 32A and a lens 32B. The lens antenna 32 outputs the first and second transmission signals S1 _t and S2 _t toward the object to be measured O, and the first and second transmission signals S1 reflected by the object to be measured O. _t and S2 _t are received as the first and second received signals S1 _r and S2 _r .

The lens antenna 32 can transmit and receive the first and second transmission signals S1 _t and S2 _t and the first and second reception signals S1 _r and S2 _{r in the same} manner as the multiband antenna 28 of the second embodiment. It has become a structure. In this case, the lens antenna 32 constitutes a single multiband antenna that is used as both a multiband transmission antenna and a multiband reception antenna.

The lens 32B is provided in the signal irradiation direction of the primary radiator 32A. This lens 32B converts, for example, a spherical wave formed of a convex lens for millimeter waves having a predetermined dielectric constant distribution into a plane wave. That is, the first and second transmission signals S1 _t and S2 _t irradiated from the primary radiator 32A are converted from spherical waves to plane waves by the lens 32B, and the directivity is increased. In this case, the second transmission signal S2 _t is a high frequency than the first transmission signal S1 _t is more lens effect is increased, the higher the directivity. In this case, the rate of change (improvement) in gain of the first and second transmission signals S1 _t and S2 _t by using the lens 32B is larger in the second transmission signal S2 _t having a high frequency. As a result, by using the lens 32B, a frequency characteristic difference such as a propagation loss between the first transmission signal S1 _t and the second transmission signal S2 _t can be reduced. The lens 32B may be configured by, for example, a Fresnel lens, and is not limited to a convex lens for millimeter waves as long as desired gain and directivity can be obtained.

Thus, in the third embodiment, substantially the same operational effects as those in the first and second embodiments can be obtained. In the radio wave sensor device 31, a multiband transmission antenna and a multiband reception antenna are configured by a lens antenna 32. Here, generally, low-frequency signals (radio waves) have a small propagation loss, and high-frequency signals tend to have a large propagation loss. On the other hand, the lens antenna 32 tends to have low directivity and gain for low frequency signals and high directivity and gain for high frequency signals. Therefore, first, by the frequencies f1, f2 are different one octave or more in the second transmission signal _S1 t, S2 _t, first, the difference in propagation loss between the second transmission signal _S1 t, S2 _t Even when it occurs, such a difference in propagation loss can be reduced by the directivity and gain characteristics of the lens antenna 32. As a result, when the first and second transmission signals S1 _t and S2 _t are output from the lens antenna 32, one of the first and second transmission signals S1 _t and S2 _t is not significantly attenuated. The object to be measured O can be irradiated with the first and second transmission signals S1 _t and S2 _t with sufficient signal intensity with a small frequency characteristic difference.

Further, when the lens antenna 32 receives a signal reflected by the object to be measured O, one of the first and second received signals S1 _r and S2 _r is not greatly attenuated, and the first and first signals are not attenuated. Different information of the object to be measured O can be obtained from the two received signals S1 _r and S2 _r .

  In the third embodiment, a spherical wave is converted into a plane wave using a lens antenna. However, a reflector antenna having a predetermined reflecting surface such as a parabolic antenna may be used.

  Next, FIG. 6 shows a radio wave sensor device according to a fourth embodiment of the present invention. The feature of the fourth embodiment is that the inside of a structure such as a bridge or a tunnel is scanned using a radio wave sensor device. Note that in the fourth embodiment, identical symbols are assigned to configurations identical to those in the first and second embodiments described above, and descriptions thereof are omitted.

  The radio wave sensor device 41 according to the fourth embodiment is configured similarly to the radio wave sensor device 21 according to the second embodiment. The radio wave sensor device 41 includes a transmission / reception circuit 22, a multiband antenna 42, a detection circuit 43, and the like.

The multiband antenna 42 is connected to the transmission / reception circuit 22 and, like the multiband antenna 28 of the second embodiment, the first and second transmission signals S1 _t and S2 _t and the first and second reception signals. S1 _r, S2 _r is constituted by transmitting and receiving various possible antenna. Here, the multiband antenna 42 includes various scanning mechanisms 42 </ b> A capable of, for example, beam scanning in order to scan the measurement target object O that is a structure such as a bridge.

The detection circuit 43 is configured in substantially the same manner as the detection circuit 29 of the second embodiment, and the first and second detection signals S1 _d and S2 _d are obtained from the first and second mixed signals S1 _m and S2 _m . To detect. The detection circuit 43 is connected to the transmission / reception circuit 22 and includes, for example, an image processing device (not shown). In this case, the detection circuit 43 detects the phase difference or amplitude difference between the first transmission signal S1 _t and the first reception signal S1 _r as the first detection signal S1 _d . The detection circuit 43 detects a phase difference or an amplitude difference between the second transmission signal S2 _t and the second reception signal S2 _r as the second detection signal S2 _d . Then, the detection circuit 43 combines the first and second detection signals S1 _d and S2 _d with an image processing device, and generates an image of the internal structure of the measurement target O. In this case, for example, by the first detection signal S1 _d corresponding to the frequency f1, an image is obtained in the vicinity of the surface of the structure, the second detection signal S2 _d corresponding to the frequency f2, the internal structure image Is obtained.

Thus, in the fourth embodiment, it is possible to obtain substantially the same operational effects as those in the first and second embodiments. The radio wave sensor device 41 outputs the first and second transmission signals S1 _t and S2 _t toward the structure as the object to be measured O using the single multiband antenna 42, and reflects the first , Second reception signals S1 _r and S2 _r are received. Further, the detection circuit 43 of the radio wave sensor device 41 has an internal structure of the object to be measured O based on the first and second detection signals S1 _d and S2 _d based on the first and second reception signals S1 _r and S2 _r. Is detected. This makes it possible to synthesize the information of the first detection signal S1 object to be measured is detected by _d O, and a second detection signal S2 object to be measured O in the information detected by the _d, complex Without different signal processing, two different pieces of information on the measurement object O can be simultaneously obtained without contact.

  Next, FIG. 7 shows a radio wave sensor device according to a fifth embodiment of the present invention. A feature of the fifth embodiment resides in that a radio wave sensor device is used to detect the distance and angle with the object to be measured, the speed of the object to be measured, and the like. Note that in the fifth embodiment, identical symbols are assigned to configurations identical to those in the first and second embodiments described above, and descriptions thereof are omitted.

  The radio wave sensor device 51 according to the fifth embodiment is configured similarly to the radio wave sensor device 21 according to the second embodiment. The radio wave sensor device 51 includes a transmission / reception circuit 22, a multiband antenna 28, a detection circuit 52, and the like.

The detection circuit 52 is configured in substantially the same manner as the detection circuit 29 of the second embodiment, and converts the first and second detection signals S1 _d and S2 _d from the first and second mixed signals S1 _m and S2 _m . To detect. The detection circuit 52 is connected to the transmission / reception circuit 22 and detects, for example, information on the object to be measured O1 such as a car using a low-frequency first transmission signal S1 _t , and a high-frequency second transmission signal S2 _t. Is used to detect information on the object to be measured O2, such as a person.

Here, since the first transmission signal S1 _t has a low frequency and a long wavelength, the first transmission signal S1 _t is suitable for detecting a farther object to be measured O1, and the second transmission signal S2 _t has a high frequency and a short wavelength. It is suitable for the detection of a near object to be measured O2. In this case, the detection circuit 52 transmits the first and second transmission signals S1 _t and S2 _t using the first and second detection signals S1 _d and S2 _d , and then receives the first and second reception signals. By measuring the time until the signals S1 _r and S2 _r are received, the distance between the radio wave sensor device 51 and the objects to be measured O1 and O2 can be detected. At that time, by measuring the Doppler frequencies f1d and f2d, the speeds of the objects to be measured O1 and O2 can be detected. Further, for example, the phase of the first and second transmission signals S1 _t and S2 _t and the first and second reception signals S1 _r and S2 _r are detected, and the radio wave sensor device 51 and the object to be measured O1, An angle with O2 can also be detected.

Thus, in the fifth embodiment, it is possible to obtain substantially the same operational effects as those in the first and second embodiments. The radio wave sensor device 51 uses the single multiband antenna 28 to irradiate the measurement target objects O1 and O2 with the first and second transmission signals S1 _t and S2 _t, and the measurement target object O1 and O2. The first and second received signals S1 _r and S2 _r that are reflected waves from O2 are received. This makes it possible to detect the information of the first detection signal S1 object to be measured is detected by _d O1, and the information of the second detection signal S2 to be measured is detected by the _d object O2, a broad Even without using a frequency band, a plurality of pieces of information on two different objects to be measured O1 and O2 can be obtained simultaneously.

In the first embodiment, in the detection circuit 12, the first and second detection signals S1 _d and S2 _{d having the} Doppler frequencies f1d and f2d from the first and second mixed signals S1 _m and S2 _m are used. It was set as the structure which detects. However, the present invention is not limited to this, and the detection circuit detects the phase difference or amplitude difference between the first and second transmission signals and the first and second reception signals from the first and second mixed signals. It is good also as composition to do. The same applies to the second, third, and fifth embodiments.

Further, in the first embodiment, as shown in FIG. 3, information such as the noise removal signal S _nr and heart rate is obtained based on the temporal change of the first and second detection signals S1 _d and S2 _d. It was. However, the present invention is not limited to this, and a noise removal signal and various types of information may be obtained based on the frequency spectra of the first and second detection signals. The same applies to the second, third, fourth, and fifth embodiments.

In the first embodiment, the first transmission signal S1 _t is a low frequency f1, and the second transmission signal S2 _t is a high frequency f2. However, the present invention is not limited to this, the first transmission signal and a high frequency, a second transmission signal S2 _t may be a low frequency. The same applies to the second, third, fourth, and fifth embodiments. Further, in each of the above embodiments, two types of transmission signals S1 _t and S2 _t having different frequencies are used, but three or more types of transmission signals may be used.

1, 21, 31, 41, 51 Radio wave sensor device 3 Transmission circuit 6 Multiband transmission antenna 7 Multiband reception antenna 8 Receiving diplexer (diplexer)
9, 23 Receiving circuit 12, 29, 43, 52 Detection circuit 27 Diplexer 28, 42 Multiband antenna 32 Lens antenna

Claims (5)

A transmission circuit that generates first and second transmission signals having different frequencies apart from each other by one octave or more;
A multiband transmission antenna connected to the transmission circuit and outputting the first and second transmission signals toward the object to be measured;
A multiband receiving antenna for receiving the first and second transmission signals that are reflected or transmitted by the object to be measured;
A diplexer for separating a first reception signal corresponding to the first transmission signal and a second reception signal corresponding to the second transmission signal from a signal received by the multiband reception antenna;
The signal synchronized with the first transmission signal and the first reception signal are mixed to output a first mixed signal, and the signal synchronized with the second transmission signal and the second reception signal are combined. A radio wave sensor device comprising: a receiving circuit that mixes and outputs a second mixed signal. The multiband transmitting antenna and the multiband receiving antenna are arranged at different positions across the object to be measured,
2. The radio wave sensor according to claim 1, wherein the first and second transmission signals output from the multiband transmission antenna are configured to be transmitted through the object to be measured and received by the multiband reception antenna. apparatus. The multiband transmitting antenna and the multiband receiving antenna are configured by a single multiband antenna that is used by both,
The radio wave sensor device according to claim 1, wherein the first and second transmission signals output from the multiband antenna are configured to be reflected by the object to be measured and received by the multiband antenna.   The radio wave sensor device according to any one of claims 1 to 3, wherein the multiband transmission antenna and the multiband reception antenna are configured by lens antennas. The first transmission signal and the second transmission signal are set so that the detection sensitivity is increased by different operations among a plurality of types of operations of the living body that is the measurement object,
Based on the first reception signal corresponding to the first transmission signal and the second reception signal corresponding to the second transmission signal, the influence of one operation is reduced and the other operation is detected. The radio wave sensor device according to any one of claims 1 to 4, further comprising a detection circuit for performing the operation.

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