CN116346150A - Wearable detection device and detection method - Google Patents
Wearable detection device and detection method Download PDFInfo
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- CN116346150A CN116346150A CN202111603261.9A CN202111603261A CN116346150A CN 116346150 A CN116346150 A CN 116346150A CN 202111603261 A CN202111603261 A CN 202111603261A CN 116346150 A CN116346150 A CN 116346150A
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- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3827—Portable transceivers
- H04B1/385—Transceivers carried on the body, e.g. in helmets
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3827—Portable transceivers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
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Abstract
The application provides a wearable detection equipment, is applied to electronic equipment technical field. The wearable detection device includes a first signal generator, a sensor, and a first signal detector. The first signal generator is used for generating a first radio frequency signal and transmitting the first radio frequency signal to the sensor. The sensor is used for generating a first radio frequency response signal according to the object to be detected and the first radio frequency signal and transmitting the first radio frequency response signal to the first signal detector. The first signal detector is used for obtaining first information according to the first radio frequency response signal. In this application, the wearable detection device generates a first radio frequency response signal by the sensor. Therefore, the first radio frequency signal does not need to be transmitted through the object to be detected, so that the reliability of the detection result is improved.
Description
Technical Field
The application relates to the technical field of electronic equipment, in particular to wearable detection equipment and a detection method.
Background
In order to facilitate users to detect health status from time to time, integrating some health detection functions on wearable devices is a trend in the future. For example, the signal generator and signal detector may be integrated on the wristband. The signal generator and the signal detector are symmetrically arranged along the arm. The signal generator is used for generating a radio frequency signal of a terahertz frequency band. The signal detector is used for receiving the radio frequency signal transmitted through the arm. The signal detector converts the transmitted radio frequency signal into transmission information. The wristband generates a spectrum from the transmission information and analyzes the health status of the user, such as blood glucose, skin status, or the like, using a spectrum analysis technique.
However, in practical application, most of the substances of the human body have strong absorptivity to the radio frequency signals in the terahertz frequency band, and the reliability of the detection result is reduced.
Disclosure of Invention
The application provides a wearable detection device and a detection method, wherein the wearable detection device generates a first radio frequency response signal through a sensor. Therefore, the first radio frequency signal does not need to be transmitted through the object to be detected, so that the reliability of the detection result is improved.
The first aspect of the present application provides a wearable detection device. The wearable detection device includes a first signal generator, a sensor, and a first signal detector. The first signal generator is used for generating a first radio frequency signal and transmitting the first radio frequency signal to the sensor. The sensor is used for generating a first radio frequency response signal according to the object to be detected and the first radio frequency signal. The object to be detected can be an arm, a wrist, skin, blood or air, etc. One or more of the phase, amplitude, or frequency range of the first rf-responsive signal may change when the object to be detected changes, or when the state of the object to be detected changes. The sensor is also configured to transmit a first radio frequency response signal to the first signal detector. The first signal detector is used for receiving the first radio frequency response signal and obtaining first information according to the first radio frequency response signal. The first information is used for obtaining a detection result of the object to be detected.
In an alternative form of the first aspect, the wearable detection device further comprises a circulator and a second signal detector. The signal generator is used for transmitting a first radio frequency signal to the sensor through the circulator. The sensor is also used for generating a reflected radio frequency response signal according to the object to be detected and the first radio frequency signal. One or more of the phase, amplitude, or frequency range of the reflected rf-responsive signal may change when the object to be detected changes, or when the state of the object to be detected changes. The sensor is also configured to transmit a reflected radio frequency response signal to the second signal detector. The second signal detector is used for receiving the reflected radio frequency response signal from the circulator and obtaining first reflection information according to the reflected radio frequency response signal. The first reflection information is used for obtaining a detection result of the object to be detected. Wherein, by increasing the detection reflection radio frequency response signal, the accuracy of the detection result can be improved.
In an alternative form of the first aspect, the wearable detection device further comprises a second signal generator. The second signal generator is used for generating a second radio frequency signal. The second signal generator is used for transmitting a second radio frequency signal to the sensor through the object to be detected. An antenna is arranged on the sensor. The antenna is used for receiving the second radio frequency signal and obtaining a transmission radio frequency response signal according to the object to be detected and the second radio frequency signal. The antenna is also configured to transmit a transmitted radio frequency response signal to the second signal detector. The second signal detector is also used for receiving the transmission radio frequency response signal and obtaining transmission information according to the transmission radio frequency response signal. The transmission information is used for obtaining the detection result of the object to be detected. Wherein, by increasing the detection transmission radio frequency response signal, the accuracy of the detection result can be improved.
In an alternative form of the first aspect, the wearable detection device further comprises a third signal detector. The sensor is also used for reflecting a second radio frequency signal to the object to be detected. The third signal detector is used for receiving the reflected second radio frequency signal and obtaining second reflection information according to the reflected second radio frequency signal. The second reflection information is used for obtaining the detection result of the object to be detected. Wherein, by increasing the second radio frequency signal of the detection reflection, the accuracy of the detection result can be improved.
In an alternative form of the first aspect, the wearable detection device further comprises a combiner. The third signal detector and the first signal detector are the same signal detector. The first signal detector is used for receiving the first radio frequency response signal through the combiner. The third signal detector is used for receiving the reflected second radio frequency signal through the combiner. Wherein, by sharing the same signal detector, the cost of the wearable detection device can be reduced.
In an alternative form of the first aspect, the second signal generator and the first signal generator are the same signal generator. The wearable detection device further includes a radio frequency switch. The first signal generator is used for outputting a first radio frequency signal through a first output port of the radio frequency switch in a first time period. The first signal generator is used for outputting a second radio frequency signal through a second output port of the radio frequency switch in a second time period. The first time period and the second time period do not coincide. Wherein, through sharing same signal generator, can reduce the cost of wearable check out test set.
In an alternative form of the first aspect, the spectral ranges of the first radio frequency signal and the second radio frequency signal are different. The first signal generator and the second signal generator can work simultaneously, so that the detection efficiency is improved. However, if the frequency spectrum ranges of the first radio frequency signal and the second radio frequency signal are the same, the two radio frequency signals may interfere, thereby reducing the reliability of the detection result. Therefore, the reliability of the detection result can be improved.
In an alternative form of the first aspect, the wearable detection device further comprises a processor. The processor is configured to convert the first information into a first spectrum and convert the first reflection information into a first reflection spectrum. The processor is also used for obtaining a detection result of the object to be detected according to the first frequency spectrum and the first reflection frequency spectrum.
In an alternative form of the first aspect, the wearable detection device further comprises a transceiver. The transceiver is used for sending the first information to the server and receiving the detection result of the object to be detected from the server. Wherein, by placing the spectrum analysis process to the server, the accuracy of the detection result can be improved.
In an alternative form of the first aspect, the wearable detection device further comprises a first transmission line and/or a second transmission line. The first signal generator is used for transmitting a first radio frequency signal to the sensor through a first transmission line. The first signal detector is configured to receive the first radio frequency response signal via the second transmission line. Wherein by adding transmission lines, the flexibility of design can be improved.
In an alternative form of the first aspect, the sensor comprises a hollow core waveguide. The fiber core of the first transmission line or the second transmission line is matched with the through hole of the hollow waveguide. In some scenes, a user can separate the fiber core from the hollow waveguide, so that separation of the transmission line and the sensor is realized, and user experience is improved.
A second aspect of the present application provides a method of detection. The detection method comprises the following steps: a first radio frequency signal is generated by a first signal generator. A first radio frequency signal is transmitted to the sensor by a first signal generator. A first radio frequency response signal is obtained by the sensor. The first radio frequency response signal is obtained according to the object to be detected and the first radio frequency signal. The first radio frequency response signal is received by a first signal detector. And obtaining first information according to the first radio frequency response signal.
In an alternative form of the second aspect, the first radio frequency signal is transmitted to the sensor by a circulator. The detection method further comprises the following steps: the reflected radio frequency response signal is obtained by the sensor. The reflected radio frequency response signal is obtained based on the object to be detected and the first radio frequency signal. The reflected radio frequency response signal is transmitted through the circulator to the second signal detector. And obtaining first reflection information according to the reflection radio frequency response signal.
In an alternative form of the second aspect, the detection method further comprises the steps of: a second radio frequency signal is generated by a second signal generator. And transmitting a second radio frequency signal to the sensor through the object to be detected. The transmitted radio frequency response signal is obtained by the antenna of the sensor. The transmitted rf response signal is derived from the second rf signal. The transmitted radio frequency response signal is received by a second signal detector. And obtaining transmission information according to the transmission radio frequency response signal.
In an alternative form of the second aspect, the detection method further comprises the steps of: the second radio frequency signal is reflected to the object to be detected by the sensor. The reflected second radio frequency signal is received by a third signal detector. And obtaining second reflection information according to the reflected second radio frequency signal.
In an alternative form of the second aspect, the third signal detector and the first signal detector are the same signal detector. Transmitting, by the first signal generator, a first radio frequency signal to the sensor includes: the first radio frequency signal is transmitted to the sensor through the first signal generator and the combiner. Receiving the reflected second radio frequency signal by the third signal detector comprises: the reflected second radio frequency signal is received by a combiner and a third signal detector.
In an alternative form of the second aspect, the second signal generator and the first signal generator are the same signal generator. The detection method further comprises the following steps: in a first time period, a first radio frequency signal is received from a first signal generator through a radio frequency switch, and the first radio frequency signal is output through a first output port of the radio frequency switch. And in a second time period, receiving a second radio frequency signal from the first signal generator through the radio frequency switch, and outputting the second radio frequency signal through a second output port of the radio frequency switch. The first time period and the second time period do not coincide.
In an alternative form of the second aspect, the spectral ranges of the first radio frequency signal and the second radio frequency signal are different.
In an alternative form of the second aspect, the detection method further comprises the steps of: the first information is converted to a first spectrum by the processor and the first reflection information is converted to a first reflection spectrum. And obtaining a detection result of the object to be detected according to the first frequency spectrum and the first reflection frequency spectrum.
In an alternative form of the second aspect, the detection method further comprises the steps of: the first information is transmitted to the server through the transceiver. And receiving a detection result of the object to be detected from the server through the transceiver.
In an alternative form of the second aspect, the wearable detection device further comprises a first transmission line and/or a second transmission line. Transmitting, by the first signal generator, a first radio frequency signal to the sensor includes: the first radio frequency signal is transmitted to the sensor via the first signal generator and the first transmission line. Receiving, by the first signal detector, the first radio frequency response signal includes: the first radio frequency response signal is received via the first signal detector and the second transmission line.
In an alternative form of the second aspect, the sensor comprises a hollow waveguide, the core of the first transmission line or the second transmission line being adapted to the through-hole of the hollow waveguide.
Drawings
Fig. 1 is a first schematic structural diagram of a wearable detection device provided in an embodiment of the present application;
FIG. 2a is a schematic diagram of a first configuration of a sensor provided in an embodiment of the present application;
FIG. 2b is a schematic cross-sectional view of the sensor provided in FIG. 2 a;
fig. 3 is a second schematic structural diagram of the wearable detection apparatus provided in the embodiment of the present application;
fig. 4 is a third schematic structural diagram of the wearable detection apparatus provided in the embodiment of the present application;
fig. 5 is a fourth schematic structural diagram of a wearable detection apparatus provided in an embodiment of the present application;
FIG. 6a is a schematic view of a second configuration of a sensor provided in an embodiment of the present application;
FIG. 6b is a schematic cross-sectional view of the sensor provided in FIG. 6 a;
FIG. 7a is a schematic view of a third configuration of a sensor provided in an embodiment of the present application;
FIG. 7b is a top view of the sensor provided in FIG. 7 a;
fig. 8 is a flow chart of a detection method provided in an embodiment of the present application.
Detailed Description
The application provides a wearable detection device and a detection method, wherein the wearable detection device generates a first radio frequency response signal through a sensor. Therefore, the first radio frequency signal does not need to be transmitted through the object to be detected, so that the reliability of the detection result is improved.
It is to be understood that the use of "first," "second," etc. herein is for descriptive purposes only and is not to be construed as indicating or implying any relative importance or order. In addition, for simplicity and clarity, reference numbers and/or letters are repeated throughout the several figures of the present application. Repetition does not indicate a tightly defined relationship between the various embodiments and/or configurations.
The wearable detection equipment is applied to the technical field of electronic equipment. In the technical field of electronic devices, integrating some health detection functions on wearable devices is a development trend in the future. However, in practical application, most of the substances of the human body have strong absorptivity to the radio frequency signals in the terahertz frequency band, and the reliability of the detection result is reduced.
To this end, the present application provides a wearable detection device. Fig. 1 is a schematic diagram of a first structure of a wearable detection device provided in an embodiment of the present application. As shown in fig. 1, the wearable detection device 100 includes a first signal generator 101, a sensor 102, and a first signal detector 103. The first signal generator 101 is configured to generate a first rf signal in the terahertz frequency band, and transmit the first rf signal to the sensor 102. The sensor 102 is in contact with an object to be detected (not shown in fig. 1). The sensor 102 is configured to generate a first rf response signal according to the object to be detected and the first rf signal. The object to be detected can be an arm, a finger, a shank, air or the like. One or more of the phase, amplitude, or frequency range of the first rf-responsive signal may change when the object to be detected changes, or when the state of the object to be detected changes. The sensor 102 is further configured to transmit a first radio frequency response signal to the first signal detector 103. The first signal detector 103 is configured to receive the first rf-responsive signal, and obtain first information according to the first rf-responsive signal. The first information may be phase or amplitude information corresponding to a plurality of frequency points.
The wearable detection device 100 is configured to obtain a detection result of a substance to be detected according to the first information. In practical applications, the wearable detection device 100 may obtain the detection result according to different methods. For example, the wearable detection device 100 further includes a processor. The processor includes a spectrum synthesizer and an analysis module. The spectrum synthesizer is used for converting the first information into a first frequency spectrum. The analysis module is used for obtaining a detection result of the object to be detected according to the first frequency spectrum. As another example, the wearable detection device 100 also includes a transceiver. The transceiver is configured to transmit the first information to the server. The server is used for converting the first information into a first frequency spectrum and obtaining a detection result of the object to be detected according to the first frequency spectrum. The transceiver is also used for receiving the detection result of the object to be detected from the server.
In practical applications, the first signal generator 101 may be directly connected to the sensor 102, and the first signal generator 101 may also be connected to the sensor 102 through a transmission line. For example, in fig. 1, the wearable detection device 100 further comprises a first transmission line 104. The first transmission line 104 is used for transmitting a first radio frequency signal. Similarly, the first signal detector 103 may be directly connected to the sensor 102, and the first signal detector 103 may also be connected to the sensor 102 via a transmission line. For example, in fig. 1, the wearable detection device 100 further comprises a second transmission line 105. The second transmission line 105 is used for transmitting the first radio frequency response signal.
In this application, when the mode field sizes of any two connected devices are different, a coupler may be disposed between the two devices. For example, a coupler may be included between the first signal generator 101 and the first transmission line 104. The coupler is for receiving the first radio frequency signal from the first signal generator 101 and coupling the first radio frequency signal to the first transmission line 104. For example, a coupler may be included between the first signal detector 103 and the second transmission line 105. The coupler is configured to receive the first rf-responsive signal from the second transmission line 105 and couple the first rf-responsive signal to the first signal detector 103.
From the foregoing description, the sensor 102 is configured to generate a first rf-responsive signal from a first rf signal. The structure of the sensor 102 is exemplarily described below. Fig. 2a is a schematic diagram of a first structure of a sensor provided in an embodiment of the present application. As shown in fig. 2a, the sensor 102 includes a media 1021 and a metal grid 1022. One end of the sensor 102 is connected to a first transmission line. The first transmission line includes a core 1042 and a cladding 1041. The other end of the sensor 102 is connected to a second transmission line. The second transmission line includes a core 1052 and a cladding 1051. Wherein the medium 1021, the core 1042, and the core 1052 may be one integral piece. The medium 1021 may be a dielectric fiber with both signal transmission and sensing capabilities.
The sensor 102 receives a first radio frequency signal from the first transmission line 104. The metal grid 1022 is in contact with the object to be detected. Because of the evanescent wave effect, the first radio frequency signal acts with the object to be detected. The sensor 102 generates a first radio frequency response signal from the first radio frequency signal. One or more of the phase, amplitude, or frequency range of the first rf-responsive signal may change when the object to be detected changes, or when the state of the object to be detected changes. Taking the frequency range as an example, the metal grid 1022 has frequency selective reflection capability. While the first radio frequency signal is transmitted on the sensor 102, a substantial portion of the energy of the signal in a certain frequency range is reflected. The energy of signals of other frequency ranges may be transmitted through the sensor 102. Thus, a portion of the first RF signal is reflected back to the first transmission line 104. Another portion of the first rf signal is transmitted to the second transmission line 105. The frequency range of a portion of the rf signal is related to the structural dimensions of the metal grid 1022, the properties of the medium 1021, and the like. When the state of the object to be detected changes, the frequency range of the reflected signal changes. At this time, the frequency range of the other part of the radio frequency signal is correspondingly changed.
In fig. 2b, the first rf-responsive signal may be a part of the rf-signal reflected back to the first transmission line 104, or another part of the rf-signal transmitted to the second transmission line 105. In the following description, the first rf-responsive signal will be described as another part of the rf signal. At this time, the portion of the rf signal reflected back to the first transmission line 104 may also be referred to as a reflected rf response signal.
In practice, the metal grid 1022 may cover only a portion of the medium 1021 facing the object to be detected. For example, fig. 2b is a schematic cross-sectional view of the sensor provided in fig. 2 a. As shown in fig. 2b, the sensor 102 includes a media 1021 and a metal grid 1022. The metal grid 1022 covers only a portion of the surface of the medium 1021. As can be seen from the foregoing description of fig. 2a, the sensor 102 may also generate a reflected rf response signal from the first rf signal. In order to improve the accuracy of the detection result, the wearable detection device may also detect the reflected radio frequency response signal. For example, fig. 3 is a second schematic structural diagram of the wearable detection apparatus provided in the embodiment of the present application. As shown in fig. 3, the wearable detection device 100 further comprises a circulator 302 and a second signal detector 301 on the basis of fig. 1. The first signal generator 101 transmits a first radio frequency signal to the sensor 102 via the circulator 302. The sensor 102 is configured to generate a reflected radio frequency response signal from the first radio frequency signal. One or more of the phase, amplitude, or frequency range of the reflected rf-responsive signal may change when the object to be detected changes, or when the state of the object to be detected changes. The sensor 102 is configured to transmit a reflected radio frequency response signal to the circulator 302 via the first transmission line 104. The circulator 302 is used to transmit the reflected radio frequency response signal to the second signal detector 301. The second signal detector 301 is configured to obtain first reflection information according to the reflected radio frequency response signal. The first reflection information is phase or amplitude information corresponding to a plurality of frequency points. The wearable detection device 100 may generate a first reflection spectrum from the first reflection information. The wearable detection device 100 may obtain a detection result of the object to be detected according to the first reflection spectrum and the first spectrum. Wherein in the sensor 102, the transmission directions of the reflected radio frequency response signal and the first radio frequency response signal are opposite.
As can be seen from the foregoing description of fig. 1, the wearable detecting device may obtain a first frequency spectrum according to the first signal detector 103, and obtain a detection result of the object to be detected according to the first frequency spectrum. In practical applications, the wearable detection device may also obtain a transmission spectrum of the object to be detected. The wearable detection equipment obtains a detection result of the object to be detected according to the first frequency spectrum and the transmission frequency spectrum. For example, fig. 4 is a schematic diagram of a third structure of the wearable detection device provided in the embodiment of the present application. As shown in fig. 4, the wearable detection device further comprises a second signal generator 401 and a third signal detector 402 on the basis of fig. 3.
The second signal generator 401 is configured to transmit a second radio frequency signal to the sensor 102 through the object to be detected. The sensor 102 is configured to receive the second rf signal, and obtain a transmitted rf response signal according to the second rf signal. The sensor 102 is configured to transmit a transmitted rf-responsive signal to the second signal detector 301 or the first signal detector 103. The second signal detector 301 or the first signal detector 103 is configured to receive the transmitted rf response signal, and obtain transmission information according to the transmitted rf response signal. The transmission information is phase or amplitude information corresponding to a plurality of frequency points. In a subsequent process, the wearable detection device 100 may generate a transmission spectrum from the transmission information. The wearable detection device 100 may obtain a detection result of the object to be detected according to the transmission spectrum and the first spectrum.
As can be seen from the foregoing, the first transmission line 104 may be used to transmit both reflected and transmitted rf-responsive signals. The reflected radio frequency response signal is derived from the first radio frequency signal. The transmitted rf-responsive signal is derived from the second rf signal. When the frequency spectrum ranges of the first radio frequency signal and the second radio frequency signal are the same, the reflected radio frequency response signal and the transmitted radio frequency response signal may interfere when the first signal generator and the second signal generator work simultaneously, thereby reducing the reliability of the detection result. In order to improve the reliability of the detection result, the frequency spectrum ranges of the first radio frequency signal and the second radio frequency signal may be different.
In practical applications, in order to improve accuracy of the detection result, the wearable detection device 100 may further obtain a reflection spectrum of the object to be detected. For example, in fig. 4, the wearable detection device 100 further comprises a third signal detector. The sensor 102 is further configured to reflect the second radio frequency signal toward the object to be detected. The third signal detector 402 is configured to receive the reflected second radio frequency signal, and obtain second reflection information according to the reflected second radio frequency signal. The second reflection information is phase or amplitude information corresponding to the plurality of frequency points. In a subsequent process, the wearable detection device 100 may generate a second reflection spectrum from the second reflection information. The wearable detection device 100 may obtain a detection result of the object to be detected according to the second reflection spectrum and the first spectrum.
To reduce the cost of the wearable detection device 100, the third signal detector and the first signal detector may be the same signal detector. The second signal generator and the first signal generator may be the same signal generator. For example, fig. 5 is a fourth schematic structural diagram of a wearable detection device provided in an embodiment of the present application. As shown in fig. 5, the wearable detection device 100 includes a first signal generator 101, a radio frequency switch 501, a circulator 302, a first transmission line 104, a sensor 102, a second transmission line 105, a combiner 502, a first signal detector 103, and a second signal detector 302.
Wherein, during the first period, the first signal generator 101 is configured to output a first radio frequency signal through the first output port of the radio frequency switch 501. The circulator 302 is configured to receive a first rf signal and transmit the first rf signal to the sensor 102 via the first transmission line 104. The sensor 102 is configured to generate a first rf-responsive signal and a reflected rf-responsive signal based on the first rf signal and the object to be detected. The sensor 102 is configured to transmit a first rf-responsive signal to the first signal detector 103 via the second transmission line 105 and the combiner 502. The first signal detector 103 is configured to obtain first information according to the first rf response signal. The sensor 102 is configured to transmit a reflected radio frequency response signal to the second signal detector 302 via the first transmission line 104 and the circulator 302. The second signal detector 302 is configured to obtain first reflection information based on the reflected rf response signal. In a subsequent process, the wearable detection device may generate a first spectrum from the first information. The wearable detection device may generate a first reflection spectrum from the first reflection information.
During a second period of time, the first signal generator 101 is configured to output a second radio frequency signal through a second output port of the radio frequency switch 501. The second rf signal is transmitted through the object to be detected and reaches the sensor 102. The sensor 102 is configured to generate a transmitted rf response signal from the second rf signal. The sensor 102 is configured to transmit a transmitted rf-responsive signal to the second signal detector 302 via the first transmission line 104 and the circulator 302. The second signal detector 302 is used to obtain transmission information from the transmitted rf-responsive signal. The sensor 102 is further configured to reflect the second radio frequency signal toward the object to be detected. The first signal detector 103 is configured to receive the reflected second radio frequency signal via the combiner 502. The first signal detector 103 is configured to obtain second reflection information according to the reflected second radio frequency signal. In a subsequent process, the wearable detection device may generate a second reflection spectrum from the second reflection information. The wearable detection device may generate a transmission spectrum from the transmission information.
Wherein the first time period and the second time period do not coincide. After the first frequency spectrum, the first reflection frequency spectrum, the second reflection frequency spectrum and the transmission frequency spectrum are obtained, the wearable detection device can perform joint analysis on the four frequency spectrums to obtain a detection result of the object to be detected.
In some scenarios, the user may need to separate the transmission line from the sensor. For example, when the wearable detection device is a bracelet, for convenience in wearing the bracelet, a pluggable interface may be provided on the bracelet. At this time, the pluggable interface may be an interface between the transmission line and the sensor. For example, fig. 6a is a schematic diagram of a second structure of a sensor provided in an embodiment of the present application. As shown in fig. 6a, the sensor includes a hollow waveguide 1023 and a metal grid 1022. One end of the sensor is connected with the first transmission line. The first transmission line includes a core 1042 and a cladding 1041. The other end of the sensor is connected with a second transmission line. The second transmission line includes a core 1052 and a cladding 1051. Wherein the through hole of the hollow waveguide 1023 is matched with the fiber core 1052 and the fiber core 1042. The protruding portion of the core 1052 or the core 1042 may be inserted into the through hole of the hollow waveguide 1023. When it is desired to separate the transmission line and the sensor, the protruding portion of the core 1052 or the core 1042 can be pulled out of the hollow waveguide 1023. For other descriptions of the sensor, reference may be made to the foregoing descriptions of the sensor 102 in fig. 1-5.
In practice, to avoid the first rf signal being totally reflected, the metal grid 1022 may cover only a portion of the hollow waveguide 1023. For example, fig. 6b is a schematic cross-sectional view of the sensor provided in fig. 6 a. As shown in fig. 6b, the sensor includes a hollow waveguide 1023 and a metal grid 1022. The metal grid 1022 covers only a portion of the surface of the hollow waveguide 1023.
As can be seen from the foregoing description of fig. 4 or fig. 5, the sensor 102 can obtain the transmitted rf response signal according to the second rf signal. In practice, an antenna may be provided on the sensor 102 in order to increase the energy of the transmitted rf-responsive signal. The antenna is used for obtaining a transmission radio frequency response signal according to the second radio frequency signal. For example, fig. 7a is a schematic diagram of a third structure of a sensor provided in an embodiment of the present application. As shown in fig. 7a, the sensor includes a hollow waveguide 1023, a metal cylinder 1025, and an antenna 1024. A metal cylinder 1025 and an antenna 1024 cover the surface of the hollow waveguide 1023. One end of the sensor is connected with the first transmission line. The first transmission line includes a core 1042 and a cladding 1041. The other end of the sensor is connected with a second transmission line. The second transmission line includes a core 1052 and a cladding 1051. Wherein the through hole of the hollow waveguide 1023 is matched with the fiber core 1052 and the fiber core 1042. Fig. 7b is a top view of the sensor provided in fig. 7 a. As shown in fig. 7b, antennas 1024 are symmetrically distributed along the center line of hollow waveguide 1023. The metal cylinder 1025 is distributed on both sides of the antenna 1024. The metal cylinders 1025 serve a similar function as the metal grid 1022 described above in fig. 2 a. For other descriptions of the sensor, reference may be made to the foregoing descriptions of the sensor 102 in fig. 1-5.
It should be appreciated that the foregoing is an exemplary description of a wearable detection device provided in the present application. In practical applications, the person skilled in the art may adapt the wearable detection device according to the requirements. The adaptive modification may include one or more of the following.
In fig. 2a, the wearable detection device comprises a first transmission line and a second transmission line. In practical applications, the wearable detection device may not include the first transmission line or the second transmission line. For example, in fig. 2a, the wearable detection device may not include cladding 1041 and cladding 1051, with metal grid 1022 disposed at primary cladding 1041 and primary cladding 1051. At this time, the wearable detection device may not include the first transmission line or the second transmission line. The sensor is directly connected to the first signal generator or the first signal detector.
In fig. 2a, the sensor 102 comprises a metal grid 1022. The metal grid 1022 is used to generate the reflected radio frequency response signal. In actual practice, the sensor 102 may not include the metal grid 1022. At this time, the first rf-responsive signal is an rf signal transmitted from the sensor 102 to the second transmission line 105. The transmission direction of the first radio frequency response signal is the same as the transmission direction of the first radio frequency signal.
In fig. 5, the wearable detection device may obtain four spectra. The four spectrums are a first spectrum, a first reflection spectrum, a second reflection spectrum and a transmission spectrum, respectively. In practical applications, the wearable detection device may selectively acquire a plurality of frequency spectrums among four frequency spectrums. The wearable detection device can obtain detection results of the object to be detected according to the multiple frequency spectrums.
For example, the plurality of spectra includes a first spectrum and a transmission spectrum. At this time, the wearable detection device 100 may not include the circulator 302, the second signal detector 301, and the combiner 502. Specifically, during a first time period, the sensor 102 is configured to generate a first radio frequency response signal from the first radio frequency signal. The sensor 102 is configured to transmit a first rf-responsive signal to the first signal detector 103 via the second transmission line 105. The first signal detector 103 is configured to obtain first information according to the first rf response signal. The wearable detection device 100 is configured to obtain a first spectrum according to the first information. During a second time period, the sensor 102 is configured to generate a transmitted radio frequency response signal from the second radio frequency signal. The sensor 102 is configured to transmit a transmitted rf-responsive signal to the first signal detector 103 via the second transmission line 105. The first signal detector 103 is used for obtaining transmission information according to the transmission radio frequency response signal. The wearable detection device 100 is configured to obtain a transmission spectrum according to the transmission information. The wearable detection device 100 is configured to obtain a detection result of the object to be detected according to the transmission spectrum and the first spectrum.
As another example, the plurality of spectra includes a first spectrum and a second reflection spectrum. At this time, the wearable detection device 100 may not include the circulator 302 and the second signal detector 301. Specifically, during a first time period, the sensor 102 is configured to generate a first radio frequency response signal from the first radio frequency signal. The sensor 102 is configured to transmit a first rf-responsive signal to the first signal detector 103 via the second transmission line 105 and the combiner 502. The first signal detector 103 is configured to obtain first information according to the first rf response signal. The wearable detection device 100 is configured to obtain a first spectrum according to the first information. During a second time period, the sensor 102 is configured to reflect a second radio frequency signal toward the object to be detected. The first signal detector 103 is configured to receive the second reflection information via the combiner 502. The first signal detector 103 is configured to obtain second reflection information according to the reflected second radio frequency signal. The wearable detection device 100 is configured to obtain a second reflection spectrum according to the second reflection information. The wearable detection device 100 is configured to obtain a detection result of the object to be detected according to the second reflection spectrum and the first spectrum.
As can be seen from the foregoing description, the wear detection device 100 may also include a processor or transceiver. The transceiver is configured to transmit the first information to the server. The transceiver may be a wireless radio frequency module. The processor is used for obtaining a first frequency spectrum according to the first information. The processor may be a central processor (central processing unit, CPU), a network processor (network processor, NP) or a combination of CPU and NP. The processor may further comprise a hardware chip or other general purpose processor. The hardware chip may be an application specific integrated circuit (application specific integrated circuit, ASIC), a programmable logic device (programmable logic device, PLD), or a combination thereof.
In other embodiments, the wear detection device 100 may also include a memory. The memory is used for storing first information or a first frequency spectrum. The memory may be volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an erasable ROM (EPROM), a flash memory, or the like. The volatile memory may be random access memory (random access memory, RAM).
The wearable detection apparatus provided in the present application is described above, and the detection method provided in the present application is described below. Fig. 8 is a flow chart of a detection method provided in an embodiment of the present application. As shown in fig. 8, the detection method includes the following steps.
In step 801, the wearable detection device generates a first radio frequency signal by a first signal generator. The first radio frequency signal may be a terahertz frequency band signal. The wearable detection device may continuously generate pulse signals of different frequencies over a period of time. The pulse signals with different frequencies form a first radio frequency signal. The wearable detection device may also directly generate a first radio frequency signal comprising a range of frequencies at a certain moment in time.
In step 802, the wearable detection device obtains a first radio frequency response signal through a sensor. The first radio frequency response signal is obtained according to the object to be detected and the first radio frequency signal. One or more of the phase, amplitude, or frequency range of the first rf-responsive signal may change when the object to be detected changes, or when the state of the object to be detected changes.
In step 803, the wearable detection device obtains first information according to the first radio frequency response signal. In the subsequent processing, the wearable detection device may obtain a first frequency spectrum according to the first information, and obtain a detection result of the object to be detected according to the first frequency spectrum.
It should be understood that, for the description of the detection method in the present application, reference may be made to the foregoing description of the wearable detection device. The wearable detection device may also derive a reflected radio frequency response signal from the first radio frequency signal, for example. The wearable detection device may also obtain the first reflection information from the reflected radio frequency response signal. In the subsequent processing, the wearable detection device may obtain a first reflection spectrum according to the first reflection information, and obtain a detection result of the object to be detected according to the first reflection spectrum and the first spectrum. For another example, the wearable detection device may further obtain a transmission radio frequency response signal according to the second radio frequency signal, and obtain transmission information according to the transmission radio frequency response signal. In the subsequent processing, the wearable detection device can obtain a transmission spectrum according to the transmission information, and obtain a detection result of the object to be detected according to the transmission spectrum and the first spectrum.
The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes or substitutions are intended to be covered by the scope of the present application.
Claims (18)
1. A wearable detection device comprising a first signal generator, a sensor, and a first signal detector, wherein:
the first signal generator is used for generating a first radio frequency signal and transmitting the first radio frequency signal to the sensor;
the sensor is used for generating a first radio frequency response signal according to an object to be detected and the first radio frequency signal and transmitting the first radio frequency response signal to the first signal detector;
the first signal detector is configured to receive the first radio frequency response signal, and obtain first information according to the first radio frequency response signal.
2. The wearable detection device of claim 1, further comprising a circulator and a second signal detector;
the first signal generator for transmitting the first radio frequency signal to the sensor comprises: the signal generator is used for transmitting the first radio frequency signal to the sensor through the circulator;
The sensor is further used for generating a reflected radio frequency response signal according to the object to be detected and the first radio frequency signal and transmitting the reflected radio frequency response signal to the second signal detector;
the second signal detector is used for receiving the reflected radio frequency response signal from the circulator and obtaining first reflection information according to the reflected radio frequency response signal.
3. The wearable detection device of claim 2, further comprising a second signal generator, the sensor having an antenna disposed thereon;
the second signal generator is used for generating a second radio frequency signal;
the second signal generator is used for transmitting the second radio frequency signal to the sensor through the object to be detected;
the antenna is used for receiving the second radio frequency signal, obtaining a transmission radio frequency response signal according to the second radio frequency signal, and transmitting the transmission radio frequency response signal to the second signal detector;
the second signal detector is further configured to receive the transmitted rf response signal, and obtain transmission information according to the transmitted rf response signal.
4. The wearable detection device of claim 3, further comprising a third signal detector;
The sensor is further used for reflecting the second radio frequency signal to the object to be detected;
the third signal detector is used for receiving the reflected second radio frequency signal and obtaining second reflection information according to the reflected second radio frequency signal.
5. The wearable detection device of claim 4, further comprising a combiner, the third signal detector and the first signal detector being the same signal detector;
the first signal detector for receiving the first radio frequency response signal comprises: the first signal detector is configured to receive the first radio frequency response signal through the combiner;
the third signal detector for receiving the reflected second radio frequency signal comprises: the third signal detector is configured to receive the reflected second radio frequency signal through the combiner.
6. The wearable detection apparatus according to any one of claims 3 to 5, wherein the second signal generator and the first signal generator are the same signal generator, the wearable detection apparatus further comprising a radio frequency switch;
during a first time period, a first signal generator is configured to output the first radio frequency signal through a first output port of the radio frequency switch;
In a second period of time, the first signal generator is configured to output the second radio frequency signal through a second output port of the radio frequency switch, the first period of time and the second period of time not coinciding.
7. The wearable detection apparatus according to any one of claims 3 to 5, wherein the first and second radio frequency signals differ in spectral range.
8. The wearable detection apparatus of any of claims 2-4, further comprising a processor;
the processor is used for converting the first information into a first frequency spectrum, converting the first reflection information into a first reflection frequency spectrum, and obtaining a detection result of the object to be detected according to the first frequency spectrum and the first reflection frequency spectrum.
9. The wearable detection apparatus of any of claims 1-7, wherein the wearable detection apparatus further comprises a transceiver;
the transceiver is used for sending the first information to a server and receiving the detection result of the object to be detected from the server.
10. The wearable detection apparatus according to any of claims 1 to 9, further comprising a first transmission line and/or a second transmission line;
The first signal generator for transmitting the first radio frequency signal to the sensor comprises: the first signal generator is used for transmitting the first radio frequency signal to the sensor through the first transmission line;
the first signal detector for receiving the first radio frequency response signal comprises: the first signal detector is configured to receive the first radio frequency response signal via the second transmission line.
11. The wearable detection apparatus according to claim 10, wherein the sensor comprises a hollow waveguide, the core of the first transmission line or the second transmission line being adapted to the through-hole of the hollow waveguide.
12. A method of detection comprising:
generating a first radio frequency signal by a first signal generator;
transmitting the first radio frequency signal to a sensor by the first signal generator;
obtaining a first radio frequency response signal through the sensor, wherein the first radio frequency response signal is obtained according to an object to be detected and the first radio frequency signal;
receiving the first radio frequency response signal by a first signal detector;
and obtaining first information according to the first radio frequency response signal.
13. The method of claim 12, wherein,
transmitting, by the first signal generator, the first radio frequency signal to a sensor includes: transmitting the first radio frequency signal to the sensor through the first signal generator and circulator;
the method further comprises the steps of:
obtaining a reflected radio frequency response signal by the sensor, wherein the reflected radio frequency response signal is obtained according to the object to be detected and the first radio frequency signal;
transmitting said reflected radio frequency response signal through said circulator to a second signal detector;
and obtaining first reflection information according to the reflection radio frequency response signal.
14. The method of detecting according to claim 13, further comprising:
generating a second radio frequency signal by a second signal generator;
transmitting the second radio frequency signal to the sensor through the object to be detected;
obtaining a transmission radio frequency response signal through an antenna of the sensor, wherein the transmission radio frequency response signal is obtained according to the second radio frequency signal;
receiving the transmitted radio frequency response signal by the second signal detector;
and obtaining transmission information according to the transmission radio frequency response signal.
15. The method of detecting according to claim 14, further comprising:
reflecting the second radio frequency signal to the object to be detected through the sensor;
receiving the reflected second radio frequency signal by a third signal detector;
and obtaining second reflection information according to the reflected second radio frequency signal.
16. The method of any one of claims 13 to 15, further comprising:
converting, by a processor, the first information into a first spectrum, converting the first reflection information into a first reflection spectrum;
and obtaining a detection result of the object to be detected according to the first frequency spectrum and the first reflection frequency spectrum.
17. The method of any one of claims 12 to 15, further comprising:
transmitting the first information to a server through a transceiver;
and receiving a detection result of the object to be detected from the server through the transceiver.
18. The method according to any one of claims 12 to 17, wherein,
the transmitting, by the first signal generator, the first radio frequency signal to a sensor includes: transmitting the first radio frequency signal to the sensor through the first signal generator and a first transmission line;
The receiving, by the first signal detector, the first radio frequency response signal includes: the first radio frequency response signal is received via the first signal detector and a second transmission line.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111603261.9A CN116346150A (en) | 2021-12-24 | 2021-12-24 | Wearable detection device and detection method |
| PCT/CN2022/135151 WO2023116367A1 (en) | 2021-12-24 | 2022-11-29 | Wearable test device and test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111603261.9A CN116346150A (en) | 2021-12-24 | 2021-12-24 | Wearable detection device and detection method |
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| CN116346150A true CN116346150A (en) | 2023-06-27 |
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| CN202111603261.9A Pending CN116346150A (en) | 2021-12-24 | 2021-12-24 | Wearable detection device and detection method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0705033D0 (en) * | 2007-03-15 | 2007-04-25 | Imp Innovations Ltd | Heart rate measurement |
| WO2013118121A1 (en) * | 2012-02-11 | 2013-08-15 | Ilan Saul Barak | A microwave contactless heart rate sensor |
| US9618824B2 (en) * | 2014-09-27 | 2017-04-11 | Intel Corporation | Integrated Terahertz sensor |
| GB201520886D0 (en) * | 2015-11-26 | 2016-01-13 | Univ Aston | Non-invasive human condition monitoring device |
| CN106821358A (en) * | 2016-12-20 | 2017-06-13 | 杭州联络互动信息科技股份有限公司 | Heartbeat detection device and wearable device |
| WO2017182677A2 (en) * | 2017-08-25 | 2017-10-26 | Polar Electro Oy | Enhancing optical cardiac activity measurement |
| EP3488776A1 (en) * | 2017-11-23 | 2019-05-29 | Koninklijke Philips N.V. | Wearable device using ppg sensor for optical communication |
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2021
- 2021-12-24 CN CN202111603261.9A patent/CN116346150A/en active Pending
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