TWI825577B - Radio frequency radar device and method for detecting vital information and humidity - Google Patents

Radio frequency radar device and method for detecting vital information and humidity Download PDF

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TWI825577B
TWI825577B TW111104101A TW111104101A TWI825577B TW I825577 B TWI825577 B TW I825577B TW 111104101 A TW111104101 A TW 111104101A TW 111104101 A TW111104101 A TW 111104101A TW I825577 B TWI825577 B TW I825577B
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signal
reflected
humidity
frequency
radar
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TW202331594A (en
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張耀宗
陳胤語
高全淵
廖正農
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緯創資通股份有限公司
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Priority to CN202210185489.9A priority patent/CN116559860A/en
Priority to US17/696,999 priority patent/US20230240906A1/en
Priority to EP22168126.5A priority patent/EP4220218A1/en
Priority to US17/720,525 priority patent/US20230240550A1/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88Radar or analogous systems specially adapted for specific applications
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N22/00Investigating or analysing materials by the use of microwaves or radio waves, i.e. electromagnetic waves with a wavelength of one millimetre or more
    • G01N22/04Investigating moisture content
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A90/00Technologies having an indirect contribution to adaptation to climate change
    • Y02A90/10Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation

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Abstract

The disclosure provides a method for detecting vital information and humidity using a radio frequency radar device. An incident radar signal is emitted to a field to detect the reflected radar signal reflected by an object to be measured and the reflected radar signal reflected by a humidity sensor tag. So that, the life information of the object and the humidity information detected by the humidity sensor tag can be obtained.

Description

射頻雷達裝置及生命資訊及濕度之偵測方法Radio frequency radar device and method for detecting vital information and humidity

本發明是有關於一種雷達訊號處理技術,特別是指一種射頻雷達裝置及生命資訊及濕度之偵測方法。The present invention relates to a radar signal processing technology, in particular to a radio frequency radar device and a detection method of life information and humidity.

現今雖有用於偵測呼吸、心跳之生理資訊偵測雷達,然而在病人照護、老人長照以及嬰幼兒照護等應用上,對於需要穿著紙尿褲的病患、老年人以及嬰幼兒,無法一併偵測其尿褲濕度狀況,仍有不足。Although there are physiological information detection radars used to detect breathing and heartbeat, however, in applications such as patient care, long-term care of the elderly, and infant care, it is impossible to detect patients, the elderly, and infants who need to wear diapers at the same time. Measuring the moisture content of his diapers still showed insufficient results.

依據一些實施例,生命資訊及濕度之偵測方法包括:發射入射雷達訊號至場域,並接收場域對應之反射雷達訊號;處理反射雷達訊號以得到待測對象的身體反射訊號和濕度感測標籤的標籤反射訊號;依據身體反射訊號的相位資訊,獲得生命資訊;及依據標籤反射訊號的能量強度,獲得濕度資訊。According to some embodiments, the method of detecting vital information and humidity includes: transmitting an incident radar signal to a field and receiving a reflected radar signal corresponding to the field; processing the reflected radar signal to obtain the body reflection signal and humidity sensing of the object to be measured The tag's tag reflects the signal; life information is obtained based on the phase information of the body's reflected signal; and humidity information is obtained based on the energy intensity of the tag's reflected signal.

依據一些實施例,射頻雷達裝置包括:發射單元、接收單元、解調單元及處理單元。發射單元配置為發射入射雷達訊號至場域。接收單元配置為接收場域對應之反射雷達訊號。解調單元耦接發射單元及接收單元,配置為處理反射雷達訊號以得到待測對象的身體反射訊號和濕度感測標籤的標籤反射訊號。處理單元耦接發射單元、接收單元及解調單元,配置為依據身體反射訊號的相位資訊,獲得生命資訊,並依據標籤反射訊號的能量強度,獲得濕度資訊。According to some embodiments, a radio frequency radar device includes: a transmitting unit, a receiving unit, a demodulation unit and a processing unit. The transmitting unit is configured to transmit incident radar signals to the field. The receiving unit is configured to receive reflected radar signals corresponding to the field. The demodulation unit is coupled to the transmitting unit and the receiving unit, and is configured to process the reflected radar signal to obtain the body reflection signal of the object to be measured and the label reflection signal of the humidity sensing tag. The processing unit is coupled to the transmitting unit, the receiving unit and the demodulation unit, and is configured to obtain life information based on the phase information of the body reflected signal, and obtain humidity information based on the energy intensity of the tag reflected signal.

依據一些實施例,射頻雷達裝置包括發射單元、接收單元、第一解調電路、第二解調電路及處理單元。發射單元配置為發射不同頻率的二入射雷達訊號至場域。接收單元配置為接收場域對應之反射雷達訊號。第一解調電路耦接發射單元及接收單元,接收為第一頻率的入射雷達訊號,並配置為依據對應於第一頻率解調反射雷達訊號,以獲得身體反射訊號。第二解調電路耦接發射單元及接收單元,接收為第二頻率的入射雷達訊號,並配置為依據對應於第二頻率解調反射雷達訊號,以獲得標籤反射訊號。處理單元耦接發射單元及接收單元、第一解調電路及第二解調電路,配置為依據身體反射訊號的相位資訊,獲得生命資訊,並依據標籤反射訊號的能量強度,獲得濕度資訊。According to some embodiments, a radio frequency radar device includes a transmitting unit, a receiving unit, a first demodulation circuit, a second demodulation circuit and a processing unit. The transmitting unit is configured to transmit two incident radar signals of different frequencies to the field. The receiving unit is configured to receive reflected radar signals corresponding to the field. The first demodulation circuit is coupled to the transmitting unit and the receiving unit, receives the incident radar signal at the first frequency, and is configured to demodulate the reflected radar signal corresponding to the first frequency to obtain the body reflection signal. The second demodulation circuit is coupled to the transmitting unit and the receiving unit, receives the incident radar signal at the second frequency, and is configured to demodulate the reflected radar signal corresponding to the second frequency to obtain the tag reflection signal. The processing unit is coupled to the transmitting unit and the receiving unit, the first demodulation circuit and the second demodulation circuit, and is configured to obtain life information based on the phase information of the body reflected signal, and obtain humidity information based on the energy intensity of the tag reflected signal.

綜上所述,依據一些實施例的射頻雷達裝置及生命資訊及濕度之偵測方法,能一併量測生命資訊及濕度,節省裝置空間與硬體成本。In summary, the radio frequency radar device and the method for detecting vital information and humidity according to some embodiments can measure vital information and humidity at the same time, saving device space and hardware costs.

關於本文中所使用之「耦接」術語,其係指二或多個元件相互直接作實體或電性接觸,或是相互間接作實體或電性接觸。As used herein, the term "coupled" means that two or more elements are in direct physical or electrical contact with each other, or are in indirect physical or electrical contact with each other.

參照圖1,係為依據一些實施例的射頻雷達裝置100的使用狀態示意圖。射頻雷達裝置100發射雷達訊號(後稱「入射雷達訊號FH」)。入射雷達訊號FH發射至場域,經待測對象900、濕度感測標籤200、環境等反射回射頻雷達裝置100。於後稱經待測對象900反射的雷達訊號為「反射雷達訊號FN」,經濕度感測標籤200反射的雷達訊號為「反射雷達訊號FN’」。Referring to FIG. 1 , which is a schematic diagram of a usage state of a radio frequency radar device 100 according to some embodiments. The radio frequency radar device 100 emits a radar signal (hereinafter referred to as "incident radar signal FH"). The incident radar signal FH is transmitted to the field and is reflected back to the radio frequency radar device 100 by the object to be measured 900, the humidity sensing tag 200, the environment, etc. The radar signal reflected by the object to be measured 900 is hereinafter referred to as the “reflected radar signal FN”, and the radar signal reflected by the humidity sensing tag 200 is referred to as the “reflected radar signal FN’”.

在一些實施例中,射頻雷達裝置100為連續波(Continuous Wave,CW)雷達。In some embodiments, the radio frequency radar device 100 is a continuous wave (Continuous Wave, CW) radar.

合併參照圖2及圖3,圖2為依據一些實施例的射頻雷達裝置100的架構示意圖,圖3為依據一些實施例的生命資訊及濕度之偵測方法流程圖。射頻雷達裝置100包括一收發器110、一解調單元120及一處理單元130。收發器110包括一發射單元111及一接收單元112。發射單元111配置為發射入射雷達訊號FH(步驟S31)。發射單元111包括有發射天線及振盪電路(圖未示)。振盪電路可產生射頻訊號,此射頻訊號經由發射天線發射出去。因此發射天線須設計在發射頻率範圍內能有效工作。在此,發射天線可為貼片天線(Patch Antenna),但本揭露非限於此。Referring to FIG. 2 and FIG. 3 together, FIG. 2 is a schematic structural diagram of a radio frequency radar device 100 according to some embodiments, and FIG. 3 is a flow chart of a method for detecting life information and humidity according to some embodiments. The radio frequency radar device 100 includes a transceiver 110, a demodulation unit 120 and a processing unit 130. The transceiver 110 includes a transmitting unit 111 and a receiving unit 112. The transmitting unit 111 is configured to transmit the incident radar signal FH (step S31). The transmitting unit 111 includes a transmitting antenna and an oscillation circuit (not shown). The oscillator circuit can generate a radio frequency signal, which is emitted through the transmitting antenna. Therefore, the transmitting antenna must be designed to work effectively within the transmitting frequency range. Here, the transmitting antenna may be a patch antenna (Patch Antenna), but the present disclosure is not limited thereto.

接收單元112配置為接收反射雷達訊號FN、FN’(步驟S32)。接收單元112包括有接收天線,此接收天線的工作頻率範圍須涵蓋反射雷達訊號FN、FN’之頻率。可選地,當一接收天線的工作頻率範圍可涵蓋反射雷達訊號FN、FN’之頻率,接收天線為一個即可。反之,可採用兩接收天線,個別工作在不同的頻率範圍,以分別涵蓋反射雷達訊號FN、FN’之頻率。可以理解地,若僅是接收相同頻率的反射雷達訊號FN、FN’,也可以僅有一接收天線。The receiving unit 112 is configured to receive the reflected radar signals FN, FN' (step S32). The receiving unit 112 includes a receiving antenna, and the working frequency range of the receiving antenna must cover the frequencies of the reflected radar signals FN and FN’. Optionally, when the working frequency range of a receiving antenna can cover the frequencies of reflected radar signals FN and FN’, only one receiving antenna is required. On the contrary, two receiving antennas can be used, each operating in a different frequency range, to cover the frequencies of reflected radar signals FN and FN’ respectively. It can be understood that if only the reflected radar signals FN and FN' of the same frequency are received, there may be only one receiving antenna.

解調單元120耦接發射單元111及接收單元112,配置為處理反射雷達訊號FN、FN’以得到待測對象900的一身體反射訊號Sb(步驟S33)和濕度感測標籤200之一標籤反射訊號St(步驟S35)。處理單元130耦接發射單元111、接收單元112及解調單元120,以控制此些單元,配置為依據身體反射訊號Sb的相位資訊,獲得一生命資訊(步驟S34),並依據標籤反射訊號St的能量強度,獲得一濕度資訊(步驟S36)。藉此,可透過射頻雷達裝置100一併獲取生命資訊與濕度資訊。例如應用於嬰兒照顧之應用,可同時得知嬰兒的生命反應及尿布狀況,然而發明不侷限於此應用。The demodulation unit 120 is coupled to the transmitting unit 111 and the receiving unit 112 and is configured to process the reflected radar signals FN and FN' to obtain a body reflection signal Sb of the object to be measured 900 (step S33) and a label reflection of the humidity sensing tag 200 Signal St (step S35). The processing unit 130 is coupled to the transmitting unit 111, the receiving unit 112 and the demodulating unit 120 to control these units, and is configured to obtain a life information based on the phase information of the body reflection signal Sb (step S34), and based on the tag reflection signal St energy intensity to obtain humidity information (step S36). In this way, vital information and humidity information can be simultaneously obtained through the radio frequency radar device 100 . For example, when used in baby care applications, the baby's vital response and diaper status can be known at the same time. However, the invention is not limited to this application.

在詳細說明解調單元120與處理單元130之運作原理之前,先說明濕度感測標籤200之架構。參照圖4,係為依據第一實施例的濕度感測標籤200之架構示意圖。濕度感測標籤200包括輸入天線210、倍頻電路220、RF-DC轉換器230、振盪器240、輸出天線250及濕度感測器260。Before describing the operation principles of the demodulation unit 120 and the processing unit 130 in detail, the structure of the humidity sensing tag 200 is first described. Referring to FIG. 4 , which is a schematic structural diagram of the humidity sensing tag 200 according to the first embodiment. The humidity sensing tag 200 includes an input antenna 210, a frequency multiplication circuit 220, an RF-DC converter 230, an oscillator 240, an output antenna 250 and a humidity sensor 260.

輸入天線210用以接收來自射頻雷達裝置100傳送之入射雷達訊號FH。在此,輸入天線210可以為雙偶極貼片天線,但本揭露不以此為限。輸入天線210耦接倍頻電路220及RF-DC轉換器230。倍頻電路220接收輸入天線210收到的入射雷達訊號FH,並將入射雷達訊號FH倍頻,亦即依據頻率為f0的入射雷達訊號FH(或稱基頻信號)產生頻率為2f0的訊號(或稱倍頻信號)。RF-DC轉換器230為一能量收集器,收集由輸入天線210接收之入射雷達訊號FH能量,一部份之射頻信號能量由RF-DC轉換器230收集並升壓至其他電路之工作電壓,以提供濕度感測標籤200工作電壓。因此,濕度感測標籤200無需額外裝設電池。然而,在一些實施例中,可以電池來取代RF-DC轉換器230,以提供電路工作電壓。RF-DC轉換器230主要可由多個二極體及多個電容器組成之電壓倍增器(voltage multiplier)實現。RF-DC轉換器230還耦接振盪器240,以供給工作電壓予振盪器240。振盪器240耦接於倍頻電路220的偏壓端,以產生特定頻率訊號來調變倍頻電路220的訊號。此特定頻率訊號可作為標籤識別。圖4係例示振盪器240之組成,係可由反向器G1、G2、電阻R1、R2及電容C1等元件實現,但本揭露不以此為限。The input antenna 210 is used to receive the incident radar signal FH transmitted from the radio frequency radar device 100 . Here, the input antenna 210 may be a double dipole patch antenna, but the disclosure is not limited thereto. The input antenna 210 is coupled to the frequency multiplication circuit 220 and the RF-DC converter 230 . The frequency multiplier circuit 220 receives the incident radar signal FH received by the input antenna 210 and multiplies the frequency of the incident radar signal FH, that is, a signal with a frequency of 2f0 is generated based on the incident radar signal FH with a frequency of f0 (or fundamental frequency signal) ( Or called frequency doubled signal). The RF-DC converter 230 is an energy collector that collects the incident radar signal FH energy received by the input antenna 210. A part of the radio frequency signal energy is collected by the RF-DC converter 230 and boosted to the operating voltage of other circuits. to provide the humidity sensing tag 200 operating voltage. Therefore, the humidity sensing tag 200 does not need to be equipped with an additional battery. However, in some embodiments, a battery may be used instead of the RF-DC converter 230 to provide the circuit operating voltage. The RF-DC converter 230 can be mainly implemented by a voltage multiplier composed of multiple diodes and multiple capacitors. The RF-DC converter 230 is also coupled to the oscillator 240 to provide operating voltage to the oscillator 240 . The oscillator 240 is coupled to the bias terminal of the frequency multiplier circuit 220 to generate a specific frequency signal to modulate the signal of the frequency multiplier circuit 220 . This specific frequency signal can be identified as a tag. Figure 4 illustrates the composition of the oscillator 240, which can be implemented by inverters G1, G2, resistors R1, R2, capacitor C1 and other components, but the disclosure is not limited thereto.

圖4還例示倍頻電路220之組成,但非以此限定本揭露。倍頻電路220由二極體D1、多條微帶線Sp1~Sp6、電阻R bias和電容C2構成。二極體D1之輸入端耦接微帶線Sp1、Sp3、電阻R bias和電容C2等元件,電容C2作為旁路電容,以濾除倍頻信號(2f0)。倍頻電路220之輸出可藉由調控二極體D1的偏壓來起振或停止。電阻R bias作為偏壓電阻,耦接振盪器240來控制調變倍頻電路220。二極體D1之輸出端耦接微帶線Sp2、Sp4、Sp5、Sp6,其形成高通濾波器,以濾除基頻信號(f0)。在此,微帶線Sp3之長度為基頻信號的四分之一波長,微帶線Sp4、Sp5、Sp6之長度為倍頻信號的四分之一波長。 FIG. 4 also illustrates the composition of the frequency multiplication circuit 220, but does not limit the present disclosure. The frequency doubling circuit 220 is composed of a diode D1, a plurality of microstrip lines Sp1 to Sp6, a resistor R bias , and a capacitor C2. The input end of the diode D1 is coupled to the microstrip lines Sp1 and Sp3, the resistor R bias , the capacitor C2 and other components. The capacitor C2 is used as a bypass capacitor to filter out the frequency multiplied signal (2f0). The output of the frequency multiplier circuit 220 can start or stop oscillating by adjusting the bias voltage of the diode D1. The resistor R bias serves as a bias resistor and is coupled to the oscillator 240 to control the modulation multiplication circuit 220 . The output end of the diode D1 is coupled to the microstrip lines Sp2, Sp4, Sp5, and Sp6, which form a high-pass filter to filter out the fundamental frequency signal (f0). Here, the length of the microstrip line Sp3 is a quarter wavelength of the fundamental frequency signal, and the lengths of the microstrip lines Sp4, Sp5, and Sp6 are a quarter wavelength of the doubled frequency signal.

輸出天線250耦接倍頻電路220,以將經過調變及倍頻的射頻訊號發射出去,亦即於此將輸出耦合作為標籤識別之特定頻率訊號的倍頻信號(2f0)。輸出天線250耦接濕度感測器260,構成濕度偵測天線。濕度感測器260為可變電容器。隨濕度造成其介質之變化,將影響電容器之介電係數,進而影響輸出天線250之共振頻率,使得倍頻信號(2f0)的能量強度發生改變。從而,射頻雷達裝置100可透過偵測倍頻信號的(2f0)的信號強度變化來得知濕度變化。濕度感測器260可為叉指型電容器(interdigital capacitor)或平行板電容器(parallel plate capacitor)。The output antenna 250 is coupled to the frequency doubling circuit 220 to emit the modulated and frequency multiplied radio frequency signal, that is, the output is coupled to the frequency multiplied signal (2f0) as a specific frequency signal identified by the tag. The output antenna 250 is coupled to the humidity sensor 260 to form a humidity detection antenna. Humidity sensor 260 is a variable capacitor. Changes in the medium caused by humidity will affect the dielectric coefficient of the capacitor, thereby affecting the resonant frequency of the output antenna 250, causing the energy intensity of the frequency doubled signal (2f0) to change. Therefore, the radio frequency radar device 100 can learn the humidity change by detecting the signal intensity change of (2f0) of the frequency doubled signal. The humidity sensor 260 may be an interdigital capacitor or a parallel plate capacitor.

參照圖5,係為依據一實施例之濕度偵測天線之結構示意圖。端點258為輸出天線250的信號饋入端,接收倍頻電路220的訊號。輸出天線250於此為貼片天線,長度L為37.5釐米,寬度W為51釐米,饋入段長度L inset為9.5釐米。濕度感測器260為叉指型電容器,具有18個相互交錯的叉指電極,每一電極之長為5釐米,寬為0.6釐米,間距為0.3釐米。上述規格僅為示例,本揭露不以此為限。 Refer to FIG. 5 , which is a schematic structural diagram of a humidity detection antenna according to an embodiment. The endpoint 258 is the signal feed end of the output antenna 250 and receives the signal of the frequency multiplier circuit 220 . The output antenna 250 is a patch antenna here, with a length L of 37.5 cm, a width W of 51 cm, and a feed section length L inset of 9.5 cm. The humidity sensor 260 is an interdigital capacitor with 18 interdigitated electrodes interlaced with each other. Each electrode is 5 cm long, 0.6 cm wide, and 0.3 cm apart. The above specifications are only examples, and this disclosure is not limited thereto.

參照圖6,係為依據一實施例之濕度感測器260之結構示意圖。於此,濕度感測器260為平行板電容器,具有上下間隔的兩平行板261、262。Refer to FIG. 6 , which is a schematic structural diagram of a humidity sensor 260 according to an embodiment. Here, the humidity sensor 260 is a parallel plate capacitor having two parallel plates 261 and 262 spaced up and down.

參照圖7,係為依據另一實施例之濕度感測器260之結構示意圖。於此,濕度感測器260為環形叉指型電容器,包括呈環狀交錯間隔設置的上環圈263和下環圈264。Refer to FIG. 7 , which is a schematic structural diagram of a humidity sensor 260 according to another embodiment. Here, the humidity sensor 260 is an annular interdigital capacitor, including an upper ring 263 and a lower ring 264 arranged at staggered annular intervals.

參照圖8,係為依據第一實施例之射頻雷達裝置100之架構示意圖。於此要說明的是,解調單元120包括第一解調電路123及第二解調電路124。第一解調電路123配置為解調經待測對象900反射的反射雷達訊號FN,因此反射雷達訊號FN的頻率與入射雷達訊號FH相同,均為f0。第二解調電路124配置為解調經濕度感測標籤200反向散射(backscatter)的反射雷達訊號FN’,如前說明,反射雷達訊號FN’之頻率為2f0。由於第一解調電路123各自負責解調不同頻率的訊號,因此可避免身體反射訊號Sb和標籤反射訊號St相互影響。Referring to FIG. 8 , which is a schematic structural diagram of a radio frequency radar device 100 according to the first embodiment. It should be noted here that the demodulation unit 120 includes a first demodulation circuit 123 and a second demodulation circuit 124. The first demodulation circuit 123 is configured to demodulate the reflected radar signal FN reflected by the object to be measured 900 , so the frequency of the reflected radar signal FN is the same as the incident radar signal FH, which is f0. The second demodulation circuit 124 is configured to demodulate the reflected radar signal FN' that is backscattered by the humidity sensing tag 200. As explained above, the frequency of the reflected radar signal FN' is 2f0. Since the first demodulation circuits 123 are each responsible for demodulating signals of different frequencies, mutual influence of the body reflection signal Sb and the tag reflection signal St can be avoided.

第一解調電路123耦接發射單元111及接收單元112,以自發射單元111接收入射雷達訊號FH,並依據對應於入射雷達訊號FH的頻率(f0)解調頻率同樣為f0的反射雷達訊號FN,以獲得身體反射訊號Sb。身體反射訊號Sb可反應出因呼吸、心跳的身體動作產生相位變化之相位資訊。The first demodulation circuit 123 is coupled to the transmitting unit 111 and the receiving unit 112 to receive the incident radar signal FH from the transmitting unit 111 and demodulate the reflected radar signal with the same frequency f0 according to the frequency (f0) corresponding to the incident radar signal FH. FN to obtain the body reflection signal Sb. The body reflection signal Sb can reflect the phase information resulting from the phase changes caused by the body movements of breathing and heartbeat.

第二解調電路124耦接發射單元111及接收單元112,自發射單元111接收經倍頻的入射雷達訊號FH(2f0),並配置為依據對應於入射雷達訊號FH的兩倍頻率(2f0)解調反射雷達訊號FN’,以獲得標籤反射訊號St。於此,發射單元111包括倍頻器,以產生倍頻信號2f0。The second demodulation circuit 124 is coupled to the transmitting unit 111 and the receiving unit 112, receives the frequency-multiplied incident radar signal FH (2f0) from the transmitting unit 111, and is configured to operate according to the doubled frequency (2f0) corresponding to the incident radar signal FH. Demodulate the reflected radar signal FN' to obtain the tag reflected signal St. Here, the transmitting unit 111 includes a frequency multiplier to generate the frequency multiplied signal 2f0.

處理單元130包括控制電路135、二類比數位轉換器136及運算電路137。控制電路135耦接發射單元111、接收單元112、第一解調電路123、第二解調電路124及運算電路137,配置為控制該等元件之運作。二類比數位轉換器136分別耦接第一解調電路123、第二解調電路124,以將身體反射訊號Sb及標籤反射訊號St轉換為數位訊號。運算電路137耦接二類比數位轉換器136,以將數位訊號進行數位訊號處理,例如去除雜訊、去除高頻信號、去除不合適的呼吸諧波,以從身體反射訊號Sb計算出呼吸,心跳資訊。具體來說,可依據身體反射訊號Sb的相位資訊的振盪頻率獲得如呼吸、心跳等生命資訊,並可依據其通常頻率範圍來區分各自資訊類型。另一方面,運算電路137可判斷標籤反射訊號St的能量強度,據以辨別出濕度感測器260的濕度資訊。The processing unit 130 includes a control circuit 135, an analog-to-digital converter 136 and an arithmetic circuit 137. The control circuit 135 is coupled to the transmitting unit 111, the receiving unit 112, the first demodulation circuit 123, the second demodulation circuit 124 and the arithmetic circuit 137, and is configured to control the operation of these components. The two analog-to-digital converters 136 are respectively coupled to the first demodulation circuit 123 and the second demodulation circuit 124 to convert the body reflection signal Sb and the tag reflection signal St into digital signals. The computing circuit 137 is coupled to the analog-to-digital converter 136 to perform digital signal processing on the digital signal, such as removing noise, removing high-frequency signals, and removing inappropriate respiratory harmonics, so as to calculate breathing and heartbeat from the body reflected signal Sb. information. Specifically, life information such as breathing and heartbeat can be obtained based on the oscillation frequency of the phase information of the body reflection signal Sb, and each information type can be distinguished based on its usual frequency range. On the other hand, the computing circuit 137 can determine the energy intensity of the tag reflection signal St, and thereby identify the humidity information of the humidity sensor 260 .

參照圖9,係為圖5所示之濕度偵測天線於不同濕度環境下的頻率響應圖。設計乾燥時之適合諧振頻率為標籤之工作頻率,可以看到,當乾燥時,因濕度偵測天線之天線電路調協佳,因此反射雷達訊號FN’強度強。當潮濕時,因濕度偵測天線之天線電路調協變差,因此反射雷達訊號FN’強度變弱。藉此,可偵測此反射雷達訊號FN’的能量強度來判別濕度。此外,當潮濕到某一程度時,反射雷達訊號FN’信號太弱,使得射頻雷達裝置100無法讀到前述作為標籤識別之特定頻率,也可作為濕度之判斷條件。Referring to FIG. 9 , a frequency response diagram of the humidity detection antenna shown in FIG. 5 under different humidity environments is shown. The suitable resonant frequency when designed to be dry is the working frequency of the tag. It can be seen that when dry, the intensity of the reflected radar signal FN’ is strong because the antenna circuit of the humidity detection antenna is well coordinated. When it is wet, the intensity of the reflected radar signal FN’ becomes weaker due to the poor coordination of the antenna circuit of the humidity detection antenna. In this way, the energy intensity of the reflected radar signal FN’ can be detected to determine the humidity. In addition, when the humidity reaches a certain level, the reflected radar signal FN' signal is too weak, making it impossible for the radio frequency radar device 100 to read the specific frequency mentioned above as a tag identification, which can also be used as a condition for judging humidity.

參照圖10,係為圖5所示之濕度偵測天線在不同濕度環境下標籤反射訊號St之訊號強度示意圖。可以看到,在不同共振頻率下,隨著濕度漸增,訊號強度可能為漸增或漸減的變化。如在868MHz為漸減,在840MHz為漸增。因此,濕度資訊可依據標籤反射訊號St的能量強度相較於一閾值的結果來判斷,例如高於某閾值或低於某閾值。此閾值亦可事先透過實驗量測欲使用的工作頻率在不同濕度條件下的變化來決定。Referring to FIG. 10 , it is a schematic diagram of the signal strength of the tag reflection signal St of the humidity detection antenna shown in FIG. 5 under different humidity environments. It can be seen that under different resonant frequencies, as the humidity increases, the signal intensity may gradually increase or decrease. For example, it is gradually decreasing at 868MHz and gradually increasing at 840MHz. Therefore, the humidity information can be determined based on the energy intensity of the tag reflection signal St compared to a threshold, for example, higher than a certain threshold or lower than a certain threshold. This threshold can also be determined in advance by experimentally measuring changes in the desired operating frequency under different humidity conditions.

在一些實施例中,由於射頻雷達裝置100與濕度感測標籤200也會改變能量強度,可能會影響濕度判斷。因此,可以在一開始尿布仍乾燥時,先記錄乾燥時之能量強度,然後根據能量強度的變化量相較於一閾值的結果來判斷濕度資訊。又或者,可以是在射頻雷達裝置100初始工作時,先記錄當時反射雷達訊號FN’之能量強度,當能量強度的變化量超過閾值時,可判斷尿布濕了。In some embodiments, since the radio frequency radar device 100 and the humidity sensing tag 200 also change energy intensity, humidity determination may be affected. Therefore, when the diaper is still dry at the beginning, the energy intensity during drying can be recorded first, and then the humidity information can be determined based on the change in energy intensity compared with a threshold. Alternatively, when the radio frequency radar device 100 initially operates, the energy intensity of the reflected radar signal FN' can be recorded first. When the change in energy intensity exceeds the threshold, it can be determined that the diaper is wet.

在一些實施例中,前述第一實施例之頻率f0為865-868MHz,但本揭露不限於此。In some embodiments, the frequency f0 of the first embodiment is 865-868 MHz, but the present disclosure is not limited thereto.

合併參照圖11及圖12。圖11為依據第二實施例之射頻雷達裝置100之架構示意圖。圖12為依據第二實施例之濕度感測標籤200之架構示意圖。與前述第一實施例之差異在於,本實施例之濕度感測標籤200不具有倍頻電路220,而是以混頻器270取代,因此反射雷達訊號FN’之頻率與反射雷達訊號FN、入射雷達訊號FH相同,均為頻率f0。因此,本實施例之解調單元120不區分為第一解調電路123、第二解調電路124,而僅為一解調電路,用以依據入射雷達訊號FH的頻率(f0)來解調訊號,以獲得身體反射訊號Sb和標籤反射訊號St。藉此,可節省硬體成本。為避免反射雷達訊號FN、FN’之間互相影響,振盪器240之震盪頻率要避開呼吸、心跳之頻率。從而,可根據反射雷達訊號FN、FN’的相位振盪頻率(即相位資訊的變化頻率)來區分身體反射訊號Sb和標籤反射訊號St。Please refer to Figure 11 and Figure 12 together. FIG. 11 is a schematic structural diagram of a radio frequency radar device 100 according to the second embodiment. FIG. 12 is a schematic structural diagram of a humidity sensing tag 200 according to the second embodiment. The difference from the first embodiment mentioned above is that the humidity sensing tag 200 of this embodiment does not have the frequency multiplier circuit 220 but is replaced by a mixer 270. Therefore, the frequency of the reflected radar signal FN' is the same as the frequency of the reflected radar signal FN' and the incident frequency of the reflected radar signal FN'. The radar signals FH are the same, both at frequency f0. Therefore, the demodulation unit 120 of this embodiment is not divided into a first demodulation circuit 123 and a second demodulation circuit 124, but is only a demodulation circuit for demodulating according to the frequency (f0) of the incident radar signal FH. signal to obtain the body reflection signal Sb and the tag reflection signal St. This can save hardware costs. In order to avoid the mutual influence between the reflected radar signals FN and FN’, the oscillation frequency of the oscillator 240 should avoid the frequencies of breathing and heartbeat. Therefore, the body reflection signal Sb and the tag reflection signal St can be distinguished based on the phase oscillation frequency of the reflected radar signals FN and FN' (that is, the changing frequency of the phase information).

圖13為依據第三實施例之生命資訊及濕度之偵測方法流程圖。前述第一實施例之射頻雷達裝置100是接收兩種頻率訊號,分別為f0及2f0,第二實施例之射頻雷達裝置100則是接收f0一種頻率訊號。第三實施例之射頻雷達裝置100同樣是接收兩種不同頻率的訊號,然而其並非兩倍的關係。在一些實施例中,可使用常用於量測生命資訊的雷達使用的頻段,如2.4GHz或5GH作為量測身體反射訊號Sb的入射雷達訊號FH的頻率。藉此,可增進偵測靈敏度。另一方面,則使用適於標籤使用的865-868MHz頻段作為量測標籤反射訊號St的入射雷達訊號FH的頻率。於此,發射單元111的天線包括一毫米波天線(如Antipodal Vivaldi天線)與一超高頻(UHF)頻段天線。Figure 13 is a flow chart of a method for detecting vital information and humidity according to the third embodiment. The radio frequency radar device 100 of the first embodiment receives two frequency signals, respectively f0 and 2f0. The radio frequency radar device 100 of the second embodiment receives a frequency signal of f0. The radio frequency radar device 100 of the third embodiment also receives signals of two different frequencies, but the relationship is not twice the same. In some embodiments, a frequency band commonly used by radar for measuring vital information, such as 2.4 GHz or 5 GHz, can be used as the frequency of the incident radar signal FH for measuring the body reflection signal Sb. In this way, the detection sensitivity can be improved. On the other hand, the 865-868MHz frequency band suitable for tag use is used as the frequency of the incident radar signal FH for measuring the tag reflected signal St. Here, the antenna of the transmitting unit 111 includes a millimeter wave antenna (such as an Antipodal Vivaldi antenna) and an ultra-high frequency (UHF) band antenna.

參照圖13,在步驟S41中,係發射不同頻率的二入射雷達訊號FH至場域。接著,在步驟S42中,接收場域對應的反射雷達訊號FN、FN’。接著,依據其中一個入射雷達訊號FH的頻率來解調反射雷達訊號FN,從而得到身體反射訊號Sb(步驟S43),並依據身體反射訊號Sb的相位資訊獲得生命資訊(步驟S44)。另一方面,依據另一個入射雷達訊號FH的頻率來解調反射雷達訊號FN’,從而得到標籤反射訊號St(步驟S45),並依據標籤反射訊號St的能量強度獲得濕度資訊(步驟S46)。Referring to FIG. 13 , in step S41 , two incident radar signals FH of different frequencies are transmitted to the field. Next, in step S42, the reflected radar signals FN and FN' corresponding to the field are received. Next, the reflected radar signal FN is demodulated based on the frequency of one of the incident radar signals FH, thereby obtaining the body reflected signal Sb (step S43), and life information is obtained based on the phase information of the body reflected signal Sb (step S44). On the other hand, the reflected radar signal FN' is demodulated based on the frequency of another incident radar signal FH to obtain the tag reflected signal St (step S45), and the humidity information is obtained based on the energy intensity of the tag reflected signal St (step S46).

參照圖14,係為依據一些實施例之分時多工示意圖。第三實施例之二入射雷達訊號FH可以分時雙工方式發射。於第一模式下,發射用於量測身體反射訊號Sb的入射雷達訊號FH,於第二模式下,發射用於量測標籤反射訊號St的入射雷達訊號FH。Refer to FIG. 14 , which is a schematic diagram of time-division multiplexing according to some embodiments. The incident radar signal FH of the second embodiment of the third embodiment can be transmitted in a time-division duplex manner. In the first mode, the incident radar signal FH used to measure the body reflection signal Sb is emitted, and in the second mode, the incident radar signal FH used to measure the tag reflection signal St is emitted.

在一些實施例中,控制電路135、二類比數位轉換器136及運算電路137可分別獨立或整合在一起,其可以是處理器、微處理器、系統上晶片等元件。In some embodiments, the control circuit 135, the analog-to-digital converter 136 and the arithmetic circuit 137 can be independent or integrated together, and can be components such as a processor, a microprocessor, and a system chip.

綜上所述,依據一些實施例的射頻雷達裝置及生命資訊及濕度之偵測方法,能一併量測生命資訊及濕度,節省裝置空間與硬體成本。In summary, the radio frequency radar device and the method for detecting vital information and humidity according to some embodiments can measure vital information and humidity at the same time, saving device space and hardware costs.

100:射頻雷達裝置 110:收發器 111:發射單元 112:接收單元 120:解調單元 123:第一解調電路 124:第二解調電路 130:處理單元 135:控制電路 136:類比數位轉換器 137:運算電路 200:濕度感測標籤 210:輸入天線 220:倍頻電路 230:RF-DC轉換器 240:振盪器 250:輸出天線 258:端點 260:濕度感測器 261,262:平行板 263:上環圈 264:下環圈 270:混頻器 900:待測對象 FH:入射雷達訊號 FN,FN’:反射雷達訊號 Sb:身體反射訊號 St:標籤反射訊號 Sp1~Sp6:微帶線 S31~S36:步驟 S41~S46:步驟 R1,R2,R bias:電阻 C1,C2:電容 D1:二極體 G1,G2:反向器 L,L inset:長度 W:寬度 100: Radio frequency radar device 110: Transceiver 111: Transmitting unit 112: Receiving unit 120: Demodulation unit 123: First demodulation circuit 124: Second demodulation circuit 130: Processing unit 135: Control circuit 136: Analog-to-digital converter 137: Arithmetic circuit 200: Humidity sensing tag 210: Input antenna 220: Frequency multiplier circuit 230: RF-DC converter 240: Oscillator 250: Output antenna 258: Endpoint 260: Humidity sensor 261, 262: Parallel plate 263: Upper ring 264: Lower ring 270: Mixer 900: Object to be measured FH: Incident radar signal FN, FN': Reflected radar signal Sb: Body reflected signal St: Tag reflected signal Sp1~Sp6: Microstrip line S31~S36 : Steps S41~S46: Steps R1, R2, R bias : Resistors C1, C2: Capacitor D1: Diode G1, G2: Inverter L, L inset : Length W: Width

[圖1]係依據一些實施例的射頻雷達裝置的使用狀態示意圖。 [圖2]係依據一些實施例的射頻雷達裝置的架構示意圖。 [圖3]係依據一些實施例的生命資訊及濕度之偵測方法流程圖。 [圖4]係依據第一實施例的濕度感測標籤之架構示意圖。 [圖5]係依據一實施例之濕度偵測天線之結構示意圖。 [圖6]係依據一實施例之濕度感測器之結構示意圖。 [圖7]係依據另一實施例之濕度感測器之結構示意圖。 [圖8]係依據第一實施例之射頻雷達裝置之架構示意圖。 [圖9]係圖5所示之濕度偵測天線於不同濕度環境下的頻率響應圖。 [圖10]係圖5所示之濕度偵測天線在不同濕度環境下標籤反射訊號之訊號強度示意圖。 [圖11]係依據第二實施例之射頻雷達裝置之架構示意圖。 [圖12]係依據第二實施例之濕度感測標籤之架構示意圖。 [圖13]係依據第三實施例之生命資訊及濕度之偵測方法流程圖。 [圖14]係依據一些實施例之分時多工示意圖。 [Fig. 1] is a schematic diagram of the usage state of a radio frequency radar device according to some embodiments. [Fig. 2] is an architectural schematic diagram of a radio frequency radar device according to some embodiments. [Figure 3] is a flow chart of a method for detecting vital information and humidity according to some embodiments. [Fig. 4] is a schematic structural diagram of a humidity sensing tag according to the first embodiment. [Fig. 5] is a schematic structural diagram of a humidity detection antenna according to an embodiment. [Fig. 6] is a schematic structural diagram of a humidity sensor according to an embodiment. [Fig. 7] is a schematic structural diagram of a humidity sensor according to another embodiment. [Fig. 8] is a schematic structural diagram of a radio frequency radar device according to the first embodiment. [Figure 9] is a frequency response diagram of the humidity detection antenna shown in Figure 5 under different humidity environments. [Figure 10] is a schematic diagram of the signal strength of the tag reflected signal from the humidity detection antenna shown in Figure 5 in different humidity environments. [Fig. 11] is a schematic structural diagram of a radio frequency radar device according to the second embodiment. [Fig. 12] is a schematic structural diagram of a humidity sensing tag according to the second embodiment. [Fig. 13] is a flow chart of a method for detecting vital information and humidity according to the third embodiment. [Figure 14] is a schematic diagram of time-sharing multiplexing according to some embodiments.

100:射頻雷達裝置 100: Radio frequency radar device

200:濕度感測標籤 200: Humidity sensing tag

900:待測對象 900:Object to be tested

FH:入射雷達訊號 FH: incident radar signal

FN,FN’:反射雷達訊號 FN, FN’: reflected radar signal

Claims (18)

一種生命資訊及濕度之偵測方法,適用於一射頻雷達裝置,該射頻雷達裝置包括一發射單元、一接收單元、一解調單元及一處理單元,該生命資訊及濕度之偵測方法包括:經由該發射單元發射一入射雷達訊號至一場域,並經由該接收單元接收該場域對應之一反射雷達訊號;經由該解調單元以不同的兩個頻率解調該反射雷達訊號,或解調該反射雷達訊號時以不同相位振盪頻率區分,以分別得到一待測對象的一身體反射訊號和一濕度感測標籤的一標籤反射訊號;經由該處理單元依據該身體反射訊號的一相位資訊,獲得一生命資訊;及經由該處理單元依據該標籤反射訊號的一能量強度,獲得一濕度資訊。 A method for detecting life information and humidity, suitable for a radio frequency radar device. The radio frequency radar device includes a transmitting unit, a receiving unit, a demodulation unit and a processing unit. The method for detecting life information and humidity includes: An incident radar signal is transmitted to a field area through the transmitting unit, and a reflected radar signal corresponding to the field field is received through the receiving unit; the reflected radar signal is demodulated at two different frequencies through the demodulation unit, or demodulated The reflected radar signal is distinguished by different phase oscillation frequencies to obtain a body reflection signal of an object to be measured and a tag reflection signal of a humidity sensing tag respectively; through the processing unit, based on a phase information of the body reflection signal, Obtain a life information; and obtain a humidity information through the processing unit according to an energy intensity of the signal reflected by the tag. 如請求項1所述之生命資訊及濕度之偵測方法,其中該身體反射訊號是依據對應於該入射雷達訊號的頻率解調該反射雷達訊號所獲得,該標籤反射訊號是依據對應於該入射雷達訊號的兩倍頻率解調該反射雷達訊號所獲得。 The method for detecting vital information and humidity as described in claim 1, wherein the body reflection signal is obtained by demodulating the reflection radar signal based on the frequency corresponding to the incident radar signal, and the tag reflection signal is obtained based on the frequency corresponding to the incident radar signal. The radar signal is obtained by demodulating the reflected radar signal at twice the frequency. 如請求項1所述之生命資訊及濕度之偵測方法,其中該身體反射訊號及該標籤反射訊號是依據對應於該入射雷達訊號的頻率解調該反射雷達訊號所獲得。 The method for detecting vital information and humidity as described in claim 1, wherein the body reflection signal and the tag reflection signal are obtained by demodulating the reflection radar signal based on the frequency corresponding to the incident radar signal. 如請求項1所述之生命資訊及濕度之偵測方法,其中該濕度資訊是依據該標籤反射訊號的該能量強度相較於一閾值的結果來判斷。 The method for detecting life information and humidity as described in claim 1, wherein the humidity information is determined based on the energy intensity of the signal reflected by the tag compared to a threshold. 如請求項1所述之生命資訊及濕度之偵測方法,其中該濕度資訊是依據該標籤反射訊號的該能量強度的變化量相較於一閾值的結果來判斷。 The method for detecting life information and humidity as described in claim 1, wherein the humidity information is determined based on the change in the energy intensity of the tag's reflected signal compared with a threshold. 如請求項1所述之生命資訊及濕度之偵測方法,更包括:依據該相位資訊的振盪頻率來區分所獲得的該生命資訊的類型。 The method for detecting life information and humidity as described in claim 1 further includes: distinguishing the type of the obtained life information based on the oscillation frequency of the phase information. 如請求項1所述之生命資訊及濕度之偵測方法,更包括:發射另一不同頻率的該入射雷達訊號至該場域。 The method for detecting life information and humidity as described in claim 1 further includes: transmitting the incident radar signal of another different frequency to the field. 如請求項7所述之生命資訊及濕度之偵測方法,其中該身體反射訊號是依據對應於該二入射雷達訊號中之一者的頻率解調該反射雷達訊號所獲得,該標籤反射訊號是依據對應於該二入射雷達訊號中之另一者的頻率解調該反射雷達訊號所獲得。 The method for detecting vital information and humidity as described in claim 7, wherein the body reflection signal is obtained by demodulating the reflection radar signal based on the frequency corresponding to one of the two incident radar signals, and the tag reflection signal is Obtained by demodulating the reflected radar signal based on a frequency corresponding to the other of the two incident radar signals. 如請求項7所述之生命資訊及濕度之偵測方法,其中該二入射雷達訊號是以分時雙工方式發射。 The method for detecting life information and humidity as described in claim 7, wherein the two incident radar signals are transmitted in a time division duplex mode. 一種射頻雷達裝置,包括:一發射單元,配置為發射一入射雷達訊號至一場域;一接收單元,配置為接收該場域對應之一反射雷達訊號;一解調單元,耦接該發射單元及該接收單元,配置為以不同的兩個頻率解調該反射雷達訊號,或解調該反射雷達訊號時以不同相位振盪頻 率區分,以分別得到一待測對象的一身體反射訊號和一濕度感測標籤的一標籤反射訊號;及一處理單元,耦接該發射單元、該接收單元及該解調單元,配置為依據該身體反射訊號的一相位資訊,獲得一生命資訊,並依據該標籤反射訊號的一能量強度,獲得一濕度資訊。 A radio frequency radar device includes: a transmitting unit configured to transmit an incident radar signal to a field area; a receiving unit configured to receive a reflected radar signal corresponding to the field area; a demodulation unit coupled to the transmitting unit and The receiving unit is configured to demodulate the reflected radar signal at two different frequencies, or to oscillate frequencies with different phases when demodulating the reflected radar signal. rate differentiation to respectively obtain a body reflection signal of an object to be measured and a label reflection signal of a humidity sensing tag; and a processing unit coupled to the transmitting unit, the receiving unit and the demodulation unit, configured as A phase information of the signal reflected by the body is used to obtain life information, and a humidity information is obtained based on an energy intensity of the signal reflected by the tag. 如請求項10所述之射頻雷達裝置,其中該解調單元包括:一第一解調電路,耦接該發射單元及該接收單元,自該發射單元接收該入射雷達訊號,並配置為依據對應於該入射雷達訊號的頻率解調該反射雷達訊號,以獲得該身體反射訊號;及一第二解調電路,耦接該發射單元及該接收單元,自該發射單元接收經倍頻的該入射雷達訊號,並配置為依據對應於該入射雷達訊號的兩倍頻率解調該反射雷達訊號,以獲得該標籤反射訊號。 The radio frequency radar device according to claim 10, wherein the demodulation unit includes: a first demodulation circuit coupled to the transmitting unit and the receiving unit, receiving the incident radar signal from the transmitting unit and configured to correspond to Demodulating the reflected radar signal at the frequency of the incident radar signal to obtain the body reflected signal; and a second demodulation circuit, coupled to the transmitting unit and the receiving unit, receiving the frequency multiplied incident signal from the transmitting unit a radar signal, and is configured to demodulate the reflected radar signal based on twice the frequency corresponding to the incident radar signal to obtain the tag reflected signal. 如請求項10所述之射頻雷達裝置,其中該解調單元為一解調電路,自該發射單元接收該入射雷達訊號,並配置為依據對應於該入射雷達訊號的頻率解調該反射雷達訊號。 The radio frequency radar device of claim 10, wherein the demodulation unit is a demodulation circuit that receives the incident radar signal from the transmitting unit and is configured to demodulate the reflected radar signal according to a frequency corresponding to the incident radar signal. . 如請求項10所述之射頻雷達裝置,其中該處理單元依據該標籤反射訊號的該能量強度相較於一閾值的結果來判斷該濕度資訊。 The radio frequency radar device of claim 10, wherein the processing unit determines the humidity information based on a result of comparing the energy intensity of the tag's reflected signal with a threshold. 如請求項10所述之射頻雷達裝置,其中該處理單元依據該標籤反射訊號的該能量強度的變化量相較於一閾值的結果來判斷該濕度資訊。 The radio frequency radar device of claim 10, wherein the processing unit determines the humidity information based on the change in the energy intensity of the tag's reflected signal compared with a threshold. 如請求項10所述之射頻雷達裝置,其中該處理單元依據該相位資訊的振盪頻率來區分所獲得的該生命資訊的類型。 The radio frequency radar device as claimed in claim 10, wherein the processing unit distinguishes the type of the obtained life information based on the oscillation frequency of the phase information. 一種射頻雷達裝置,包括:一發射單元,配置為發射不同頻率的二入射雷達訊號至一場域;一接收單元,配置為接收該場域對應之一反射雷達訊號;一第一解調電路,耦接該發射單元及該接收單元,接收為一第一頻率的該入射雷達訊號,並配置為依據對應於該第一頻率解調該反射雷達訊號,以獲得一身體反射訊號;一第二解調電路,耦接該發射單元及該接收單元,接收為一第二頻率的該入射雷達訊號,並配置為依據對應於該第二頻率解調該反射雷達訊號,以獲得一標籤反射訊號;及一處理單元,耦接該發射單元及該接收單元、該第一解調電路及該第二解調電路,配置為依據該身體反射訊號的一相位資訊,獲得一生命資訊,並依據該標籤反射訊號的一能量強度,獲得一濕度資訊。 A radio frequency radar device includes: a transmitting unit configured to transmit two incident radar signals of different frequencies to a field; a receiving unit configured to receive a reflected radar signal corresponding to the field; a first demodulation circuit, coupled Connect the transmitting unit and the receiving unit, receive the incident radar signal at a first frequency, and be configured to demodulate the reflected radar signal corresponding to the first frequency to obtain a body reflection signal; a second demodulation A circuit coupled to the transmitting unit and the receiving unit, receives the incident radar signal at a second frequency, and is configured to demodulate the reflected radar signal corresponding to the second frequency to obtain a tag reflected signal; and a A processing unit, coupled to the transmitting unit and the receiving unit, the first demodulation circuit and the second demodulation circuit, is configured to obtain a life information based on a phase information of the body reflection signal, and to obtain a life information based on the tag reflection signal An energy intensity, obtain a humidity information. 如請求項16所述之射頻雷達裝置,其中該發射單元的天線包括一毫米波天線與一超高頻頻段天線。 The radio frequency radar device according to claim 16, wherein the antenna of the transmitting unit includes a millimeter wave antenna and an ultra-high frequency band antenna. 如請求項16所述之射頻雷達裝置,其中該處理單元配置為控制該二入射雷達訊號以分時雙工方式交錯發射。 The radio frequency radar device as claimed in claim 16, wherein the processing unit is configured to control the two incident radar signals to be transmitted staggered in a time division duplex manner.
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