Biosignal detection system and biosignal detection method

Abstract

A biological signal detection system includes a liquid crystal antenna, a receiving antenna, a first processor, a second processor, and a filtering circuit. The liquid crystal antenna is used to form a holographic pattern according to a set signal and output a millimeter wave detection signal from a specific angle, and the millimeter wave detection signal is reflected as a millimeter wave physiological signal according to the physiological characteristics of the subject. The receiving antenna is used to receive the millimeter wave physiological signal. The first processor is used to adjust the specific angle of the liquid crystal antenna according to the intensity of the millimeter wave physiological signal, and the holographic pattern is related to the specific angle. The second processor is coupled to the receiving antenna and is used to confirm whether the breathing signal of the millimeter wave physiological signal is between the first voltage and the second voltage. The filtering circuit is used to perform high-pass filtering and low-pass filtering, and adjust the voltage level of the breathing signal according to the breathing signal.

Description

Technical Field

[0001] The present invention relates to a detection system and a detection method, and more particularly to a biological signal detection system and a biological signal detection method. Background Art

[0002] In nursing homes or homes, in order to monitor the vital signs of the elderly or patients, it is often necessary to monitor their physiological characteristics (such as breathing or heartbeat).

[0003] However, currently, imaging devices (such as monitors) are often used to detect the physiological characteristics of the elderly or patients, causing them to worry about privacy issues and invisibly increasing their psychological pressure.

[0004] Furthermore, imaging devices are usually installed on the ceiling, which makes them less flexible in installation. Summary of the Invention

[0005] This summary is intended to provide a simplified summary of the present disclosure so that readers can have a basic understanding of the present disclosure. This summary is not a complete overview of the present disclosure and is not intended to identify important / critical elements of the present invention or to define the scope of the present invention.

[0006] One embodiment of the present case relates to a biosignal detection system. The biosignal detection system includes a liquid crystal antenna, a receiving antenna, a first processor, a second processor, and a filtering circuit. The liquid crystal antenna is used to form a holographic pattern according to a set signal and output a millimeter wave detection signal from a specific angle, and the millimeter wave detection signal is reflected as a millimeter wave physiological signal according to the physiological characteristics of the subject. The receiving antenna is used to receive the millimeter wave physiological signal. The first processor is used to adjust the specific angle of the liquid crystal antenna according to the intensity of the millimeter wave physiological signal, and the holographic pattern is related to the specific angle. The second processor is coupled to the receiving antenna and is used to confirm whether the breathing signal of the millimeter wave physiological signal is between a first voltage and a second voltage, and the second voltage is greater than the first voltage. The filtering circuit is used to perform high-pass filtering and low-pass filtering, and adjust the voltage level of the breathing signal according to the breathing signal. When the voltage level of the breathing signal is less than the second voltage, the liquid crystal antenna continues to output the millimeter wave detection signal.

[0007] Another embodiment of the present invention relates to a biosignal detection method. The method comprises the following steps: a liquid crystal antenna forms a holographic pattern based on a set signal and outputs a millimeter wave detection signal from a specific angle, wherein the millimeter wave detection signal is reflected as a millimeter wave physiological signal based on the physiological characteristics of the subject; a receiving antenna receives the millimeter wave physiological signal; a first processor adjusts the specific angle of the liquid crystal antenna based on the strength of the millimeter wave physiological signal, wherein the holographic pattern is associated with the specific angle; a second processor determines whether a respiration signal within the millimeter wave physiological signal is between a first voltage and a second voltage, with the second voltage being greater than the first voltage; a filter circuit performs high-pass filtering and low-pass filtering and adjusts the voltage level of the respiration signal based on the respiration signal; and when the voltage level of the respiration signal is less than the second voltage, the liquid crystal antenna continues to output the millimeter wave detection signal.

[0008] Therefore, according to the technical content of this application, the biosignal detection system and biosignal detection method shown in the embodiments of this application can achieve the effect of monitoring the physiological characteristics of the subject by using a liquid crystal antenna in combination with a holographic pattern.

[0009] After referring to the following embodiments, those skilled in the art will be able to easily understand the basic spirit and other invention purposes of this case, as well as the technical means and embodiments adopted in this case. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] To make the above and other objects, features, advantages and embodiments of the present invention more apparent and understandable, the accompanying drawings are described as follows:

[0011] Figure 1 FIG1 is a block diagram illustrating a biological signal detection system according to an embodiment of the present invention.

[0012] Figure 2 FIG2 is a diagram illustrating a usage scenario of a biological signal detection system according to an embodiment of the present invention.

[0013] Figure 3A-3B FIG2 is a diagram illustrating a usage scenario of a biological signal detection system according to an embodiment of the present invention.

[0014] Figure 4 FIG. 1 is a detailed circuit diagram of a filter circuit of a biological signal detection system according to an embodiment of the present invention.

[0015] Figure 5A-5B FIG. 1 is a schematic diagram illustrating the potential levels of various signals in a biological signal detection system according to an embodiment of the present invention.

[0016] Figure 6FIG. 1 is a schematic diagram illustrating the potential levels of various signals in a biological signal detection system according to an embodiment of the present invention.

[0017] Figure 7 FIG1 is a flowchart illustrating the steps of a biological signal detection method according to an embodiment of the present invention.

[0018] According to conventional practice, various features and components in the drawings are not drawn to scale. The drawing method is to best illustrate the specific features and components related to the present invention. In addition, the same or similar reference numerals are used to refer to similar components / parts in different drawings. DETAILED DESCRIPTION

[0019] To provide a more complete and detailed description of the present disclosure, the following provides illustrative descriptions of the embodiments and specific examples of the present disclosure; however, these descriptions are not intended to be the only ways to implement or use the embodiments of the present disclosure. The detailed descriptions cover features of various embodiments, as well as the method steps and sequences for constructing and operating these embodiments. However, other embodiments may also be used to achieve the same or equivalent functionality and sequence of steps.

[0020] Unless otherwise defined in this specification, scientific and technical terms used herein have the same meanings as those commonly understood and used by those skilled in the art to which this invention relates. Furthermore, unless otherwise defined in this specification, singular nouns used in this specification include the plural form of such nouns, and plural nouns used in this specification also include the singular form of such nouns.

[0021] In addition, the term “coupled” or “connected” as used herein may refer to two or more elements being in direct physical or electrical contact with each other, or indirect physical or electrical contact with each other, or may refer to two or more elements operating or moving with each other.

[0022] In this document, the term “circuit” generally refers to an object composed of one or more transistors and / or one or more active and passive components connected in a certain manner to process signals.

[0023] Certain terms are used in this specification and claims to refer to specific components. However, those skilled in the art will understand that the same component may be referred to by different terms. This specification and claims do not distinguish components based on name, but rather on functional differences. The term "including" used in this specification and claims is open-ended and should be interpreted as meaning "including, but not limited to."

[0024] Figure 1The following is a block diagram illustrating a biosignal detection system according to one embodiment of the present invention. As shown, biosignal detection system 100 includes a liquid crystal antenna 110, a first device 120, a first processor 130, and a second device 140. First device 120 includes a receiving antenna 121 and a second processor 123. Second device 140 includes a filter circuit 141. Liquid crystal antenna 110 is coupled to second device 140, first processor 130 is coupled to second device 140, and first device 120 is coupled to second device 140.

[0025] This invention provides a method for using a liquid crystal antenna with a holographic pattern to monitor the physiological characteristics of a subject. Figure 1 The biological signal detection system 100 has related detailed operations as follows.

[0026] Figure 2 FIG2 is a diagram illustrating a usage scenario of a biological signal detection system according to an embodiment of the present invention. Figures 3A-3B FIG2 is a diagram illustrating a usage scenario of a biological signal detection system according to an embodiment of the present invention. Figure 4 This is a detailed circuit diagram of a filter circuit of a biological signal detection system according to an embodiment of the present invention. Figures 1 to 4 In one embodiment, the liquid crystal antenna 110 is used to form a holographic pattern P1 according to a setting signal and to transmit the image from a specific angle (such as Figure 3A-3B As shown) outputs millimeter wave detection signal S1 (as shown Figure 1 ), and the millimeter-wave detection signal S1 is reflected as a millimeter-wave physiological signal R1 based on the physiological characteristics of the subject 900. For example, the liquid crystal antenna 110 can be any liquid crystal array antenna. The liquid crystal antenna 110 can control the array size (e.g., 2×4, 4×8, 6×12, and 8×16), adjust the signal dynamic range according to different applications, and adjust the millimeter-wave (e.g., millimeter-wave detection signal S1) emission angle to achieve spatial scanning, but the present invention is not limited to this.

[0027] In this embodiment, Figure 3A The elevation angle signal field diagram 310 may be a schematic diagram of a signal field with an elevation angle range of 0 degree, 10 degrees, 20 degrees, 30 degrees, or 40 degrees. Figure 3BThe horizontal angle (Horizontal degree) signal field diagram 320 can be a schematic diagram of the signal field horizontal angle range of 0 degrees, 10 degrees, 20 degrees, 30 degrees or 40 degrees. In addition, the liquid crystal antenna 110 can output the millimeter wave detection signal S1 from a specific angle, and the specific angle can be the result of the combination of the pitch angle and the horizontal angle. For example, the specific angle can be (0, 30), and each specific angle can correspond to the holographic pattern P1 or P2 of the liquid crystal antenna 110 (such as Figure 2 For example, holographic pattern P1 may correspond to a specific angle (0, 0), and holographic pattern P2 may correspond to a specific angle (0, 30), but the present invention is not limited thereto. Furthermore, when subject 900 is at a pitch angle of 22 degrees, the biosignal detection system 100 receives no signal when its signal beam pattern is rotated to 0 degrees. However, the biosignal detection system 100 receives a signal when its signal beam pattern is rotated back to 22 degrees.

[0028] In some embodiments, the millimeter wave detection signal S1 or the millimeter wave physiological signal R1 may be a radio frequency microwave with a wavelength of 1 mm to 10 mm and a frequency of 30 to 300 GHz, but the present invention is not limited thereto. In some embodiments, the physiological characteristics of the subject 900 may be physical quantities such as heartbeat amplitude and respiratory amplitude, but the present invention is not limited thereto.

[0029] In this embodiment, the receiving antenna 121 is used to receive the millimeter-wave physiological signal R1. For example, the receiving antenna 121 can be any array antenna, such as a liquid crystal array antenna, an antenna on package (AoP), or an antenna on printed circuit board (AoPCB), but the present invention is not limited thereto.

[0030] In this embodiment, the first processor 130 is configured to adjust the specific angle of the liquid crystal antenna 110 based on the strength of the millimeter-wave physiological signal R1, and the holographic pattern P1 or P2 is associated with the specific angle. For example, the first processor 130 can be any micro single-board computer (e.g., a Raspberry Pi) and can be coupled to the liquid crystal antenna 110. The millimeter-wave detection signal S1 output by the liquid crystal antenna 110 at different angles corresponds to the millimeter-wave physiological signal R1 received by the receiving antenna 121. Therefore, the first processor 130 can adjust the specific angle of the liquid crystal antenna 110 based on the strength of the millimeter-wave physiological signal R1, thereby finding the specific angle at which the millimeter-wave physiological signal R1 is strongest, and continuously monitor the subject 900 at this specific angle. However, the present invention is not limited to this embodiment. Furthermore, the holographic pattern P1 or P2 can each correspond to a specific angle, similar to the previously described relationship between the holographic pattern P1 or P2 and the specific angle. For the sake of brevity, this will not be further described here. In some embodiments, the first processor 130 may use a scanning algorithm to cause the liquid crystal antenna 110 to output a millimeter wave detection signal S1 at different angles at a location (e.g., a nursing bed) (i.e., perform signal scanning) and confirm the intensity of the millimeter wave physiological signal R1 to achieve the effect of confirming the location with the maximum signal.

[0031] In this embodiment, the second processor 123 is coupled to the receiving antenna 121 and is configured to determine whether the respiration signal of the millimeter-wave physiological signal R1 is between a first voltage and a second voltage, with the second voltage being greater than the first voltage. For example, the second processor 123 may be any integrated circuit (e.g., a monolithic microwave integrated circuit (MMIC)). The first voltage may be 1.75 volts (V), and the second voltage may be 3.3 volts (V), but the present invention is not limited thereto.

[0032] In this embodiment, the filter circuit 141 is used to perform high-pass filtering and low-pass filtering, and adjust the voltage level of the breathing signal according to the breathing signal. For example, the first filters 1411 and 1412 of the filter circuit 141 (such as Figure 4 As shown, the second filters 1413 and 1414 of the filter circuit 141 can be used for high-pass filtering, and the second filters 1413 and 1414 of the filter circuit 141 can be used for low-pass filtering. Therefore, the frequency band can be limited to the range of 0.15 to 150 Hz by the filter circuit 141. The adjusters 1415 and 1416 of the filter circuit 141 can adjust the voltage level of the respiratory signal to an appropriate voltage level (voltage offset) based on the respiratory signal, but the present invention is not limited to this. In some embodiments, the voltage level of the respiratory signal can be between 1.75 and 3.3 volts, but the present invention is not limited to this.

[0033] In this embodiment, when the voltage level of the respiration signal is less than the second voltage, the liquid crystal antenna 110 continuously outputs the millimeter wave detection signal S1. For example, when the voltage level of the respiration signal is less than 3.3 volts, the liquid crystal antenna 110 may continuously output the millimeter wave detection signal S1, thereby achieving the effect of continuously monitoring the subject 900. In some embodiments, the biosignal detection system 100 may continuously monitor the respiration and heartbeat of the subject 900. When the respiration or heartbeat of the subject 900 is abnormal, the biosignal detection system 100 may issue a warning, but the present invention is not limited to this.

[0034] In one embodiment, when the voltage level of the breathing signal is greater than a first voltage, the liquid crystal antenna 110 continuously outputs the millimeter wave detection signal. For example, when the voltage level of the breathing signal is greater than 1.75 volts, the liquid crystal antenna 110 may continuously output the millimeter wave detection signal S1 to achieve the effect of continuously monitoring the subject 900.

[0035] Figure 5A-5B According to one embodiment of the present invention, a schematic diagram of the potential levels of various signals in a biological signal detection system is shown. Figure 1 and Figures 5A-5B In one embodiment, the biosignal detection system 100 further includes a third processor 143, a shifter 145, and a converter 147. For example, the third processor 143 may be any logic gate array (e.g., a field programmable gate array (FPGA)), the shifter 145 may be a voltage level shifter, and the converter 147 may be any digital-to-analog converter (e.g., a driver IC DAC), but the present invention is not limited thereto.

[0036] In operation, the first processor 130 outputs a read signal RD (eg Figure 5A For example, the first processor 130 may output a preset read signal RD to the third processor 143, but the present invention is not limited thereto.

[0037] The third processor 143 then outputs an adjustment signal SD based on the read signal RD. For example, the third processor 143 may transmit an adjustment command and related data to the shifter 145 and / or the converter 147 when outputting the adjustment signal SD, but the present invention is not limited thereto. In some embodiments, the first processor 130 outputs the read signal RD during the time interval T1, but the present invention is not limited thereto.

[0038] Next, the shifter 145 is used to output a gate signal VS (eg, Figure 5B For example, the shifter 145 may output a gate signal VS to the liquid crystal antenna 110, but the present invention is not limited thereto. In some embodiments, during the time interval T1, the shifter 145 outputs a gate signal VS, but the present invention is not limited thereto.

[0039] Then, the converter 147 is used to output the source signal HS (eg Figure 5B As shown), and the source signal HS includes a write signal WD (as shown Figure 5A For example, the converter 147 may output a source signal HS to the liquid crystal antenna 110, and the source signal HS may include a write signal WD, but the present invention is not limited thereto. In some embodiments, during the time interval T1, the converter 147 outputs the source signal HS, but the present invention is not limited thereto.

[0040] In some embodiments, the first processor 130 may output a start signal SF to the third processor 143. For example, the start signal SF may remain high after initialization and data are written to the third processor 143. When the first processor 130 needs to update data, the start signal SF may become low and timing control may be stopped until the third processor 143 completes the update, but the present invention is not limited thereto.

[0041] In one embodiment, the setting signal includes a gate signal VS and a source signal HS, and the liquid crystal antenna 110 includes a gate driver 111 and a source driver 113. For example, the setting signal received by the liquid crystal antenna 110 may include the gate signal VS and the source signal HS, but the present invention is not limited thereto.

[0042] In this embodiment, the gate driver 111 is used to receive the gate signal VS. Then, the source driver 113 is used to receive the source signal HS, and the gate driver 111 and the source driver 113 form a holographic pattern P1 or P2 (such as Figure 2 For example, the liquid crystal antenna 110 can form a holographic pattern P1 or P2 according to the gate signal VS and the source signal HS through the gate driver 111 and the source driver 113, and output the millimeter wave detection signal S1 at different angles (or specific angles), but the present invention is not limited thereto.

[0043] Figure 6 FIG. 1 is a schematic diagram illustrating the potential levels of various signals in a biological signal detection system according to an embodiment of the present invention. Figure 1 、 Figure 5A and Figure 6In one embodiment, the write signal data1 output by the converter 147 includes multiple data signals (e.g., data signals V1-V16), and the multiple data signals (e.g., data signals V1-V16) are associated with a data voltage range. For example, the write signal data1 may include multiple data signals (e.g., data signals V1-V16), and the shifter 145 may output the gate signal G1, but the present invention is not limited to this. Furthermore, the multiple data signals (e.g., data signals V1-V16) are described in detail below.

[0044]

[0045]

[0046] Table 1

[0047] In some embodiments, see Figure 1 、 Figure 6 As shown in Table 1, there can be 16 data signals (e.g., data signals V1-V16), and each data signal has a corresponding voltage value (as shown in Table 1), but the present invention is not limited thereto. Furthermore, the data signals (e.g., data signals V1-V16) can be associated with a data voltage range. For example, the voltage values of the data signals (e.g., data signals V1-V16) can be between 3 and 8.5 volts (V), but the present invention is not limited thereto.

[0048] In some embodiments, the biosignal detection system 100 can be mounted on a ceiling or wall within a building. For example, the biosignal detection system 100 monitors the physiological characteristics of the subject 900 via millimeter wave detection signal S1. Without the need for a camera or any other imaging technology, the biosignal detection system 100 can continuously monitor the physiological characteristics of the subject 900 simply by effectively receiving the millimeter wave physiological signal R1. Therefore, the biosignal detection system 100 can be installed in a concealed location or anywhere that can effectively transmit and receive millimeter wave signals, achieving installation flexibility. However, the present invention is not limited to this.

[0049] Figure 7 FIG1 is a flowchart illustrating a method for detecting biological signals according to an embodiment of the present invention. Figure 7 The biological signal detection method 700 is easy to understand, please refer to Figures 1 to 4 and Figure 7 . Figure 7 The steps of the biological signal detection method 700 are described in detail below.

[0050] In step 710, the liquid crystal antenna forms a holographic pattern according to a setting signal and outputs a millimeter wave detection signal from a specific angle. The millimeter wave detection signal is reflected as a millimeter wave physiological signal according to the physiological characteristics of the subject. In one embodiment, the liquid crystal antenna 110 can be used to form a holographic pattern P1 according to a setting signal and output a millimeter wave detection signal from a specific angle (such as Figures 3A-3B As shown) outputs millimeter wave detection signal S1 (as shown Figure 1 As shown), the millimeter wave detection signal S1 is reflected as the millimeter wave physiological signal R1 according to the physiological characteristics of the subject 900. For example, the operation of the biological signal detection method 700 is similar to Figure 1 The operations of the biological signal detection system 100 are similar, and for the sake of brevity, descriptions of other operations in the biological signal detection method 700 will be omitted here.

[0051] In step 720, the millimeter wave physiological signal is received by the receiving antenna. In one embodiment, the receiving antenna 121 can be used to receive the millimeter wave physiological signal R1. For example, the operation of the biosignal detection method 700 is similar to Figure 1 The operations of the biological signal detection system 100 are similar, and for the sake of brevity, descriptions of other operations in the biological signal detection method 700 will be omitted here.

[0052] In step 730, the first processor adjusts the specific angle of the liquid crystal antenna according to the intensity of the millimeter wave physiological signal, and the holographic pattern is related to the specific angle. In one embodiment, the first processor 130 can be used to adjust the specific angle of the liquid crystal antenna 110 according to the intensity of the millimeter wave physiological signal R1, and the holographic pattern P1 or P2 is related to the specific angle. For example, the operation of the biosignal detection method 700 is similar to Figure 1 The operations of the biological signal detection system 100 are similar, and for the sake of brevity, descriptions of other operations in the biological signal detection method 700 will be omitted here.

[0053] In step 740, the second processor determines whether the respiration signal of the millimeter wave physiological signal is between the first voltage and the second voltage, and the second voltage is greater than the first voltage. In one embodiment, the second processor 123 can determine whether the respiration signal of the millimeter wave physiological signal R1 is between the first voltage and the second voltage, and the second voltage is greater than the first voltage. For example, the operation of the biosignal detection method 700 is similar to Figure 1 The operations of the biological signal detection system 100 are similar, and for the sake of brevity, descriptions of other operations in the biological signal detection method 700 will be omitted here.

[0054] In step 750, the filter circuit performs high-pass filtering and low-pass filtering, and adjusts the voltage level of the respiratory signal according to the respiratory signal. In one embodiment, the filter circuit 141 can be used to perform high-pass filtering and low-pass filtering, and adjust the voltage level of the respiratory signal according to the respiratory signal. For example, the operation of the biosignal detection method 700 is similar to Figure 1 The operations of the biological signal detection system 100 are similar, and for the sake of brevity, descriptions of other operations in the biological signal detection method 700 will be omitted here.

[0055] In step 760, when the voltage level of the breathing signal is less than the second voltage, the liquid crystal antenna continuously outputs the millimeter wave detection signal. In one embodiment, when the voltage level of the breathing signal is less than the second voltage, the liquid crystal antenna 110 may continuously output the millimeter wave detection signal S1. For example, the operation of the biosignal detection method 700 is similar to Figure 1 The operations of the biological signal detection system 100 are similar, and for the sake of brevity, descriptions of other operations in the biological signal detection method 700 will be omitted here.

[0056] In one embodiment, the bio-signal detection method 700 further includes the following steps: when the voltage level of the breathing signal is greater than the first voltage, the liquid crystal antenna 110 may continuously output the millimeter wave detection signal. For example, the operation of the bio-signal detection method 700 is similar to Figure 1 The operations of the biological signal detection system 100 are similar, and for the sake of brevity, descriptions of other operations in the biological signal detection method 700 will be omitted here.

[0057] See also Figure 1 and Figures 5A-5B In one embodiment, the bio-signal detection method 700 further comprises the following steps: the first processor 130 outputs a read signal RD (such as Figure 5A The third processor 143 outputs an adjustment signal SD according to the read signal RD; the shifter 145 outputs a gate signal VS according to the adjustment signal SD (as shown); Figure 5B and the converter 147 outputs the source signal HS (as shown) according to the adjustment signal SD; Figure 5B As shown), and the source signal HS includes a write signal WD (as shown Figure 5A For example, the operation of the biosignal detection method 700 is similar to Figure 1 The operations of the biological signal detection system 100 are similar, and for the sake of brevity, descriptions of other operations in the biological signal detection method 700 will be omitted here.

[0058] In one embodiment, the bio-signal detection method 700 further comprises the following steps: the gate driver 111 (eg, Figure 1) receives the gate signal VS, and the setting signal includes the gate signal VS and the source signal HS; and the source driver 113 of the liquid crystal antenna 110 receives the source signal HS, and the gate driver 111 and the source driver 113 form a holographic pattern P1 or P2 (as shown) according to the gate signal VS and the source signal HS. Figure 2 For example, the operation of the biosignal detection method 700 is similar to Figure 1 The operations of the biological signal detection system 100 are similar, and for the sake of brevity, descriptions of other operations in the biological signal detection method 700 will be omitted here.

[0059] See also Figure 1 、 Figure 5A and Figure 6 In one embodiment, the write signal data1 output by the converter 147 includes a plurality of data signals (e.g., data signals V1-V16), and the plurality of data signals (e.g., data signals V1-V16) are related to a data voltage range. For example, the operation of the biosignal detection method 700 is similar to Figure 1 The operations of the biological signal detection system 100 are similar, and for the sake of brevity, descriptions of other operations in the biological signal detection method 700 will be omitted here.

[0060] The above embodiments of the present invention provide the following advantages: The biosignal detection system and method described in the present embodiment utilize a liquid crystal antenna in conjunction with a holographic pattern to monitor the subject's physiological characteristics.

[0061] Furthermore, the first processor 130 of the present invention can utilize a scanning algorithm to cause the liquid crystal antenna 110 to output millimeter-wave detection signals S1 at different angles relative to a location (e.g., a nursing bed) (i.e., perform signal scanning) and determine the intensity of the millimeter-wave physiological signal R1 to identify the location with the highest signal. Furthermore, the biosignal detection system 100 of the present invention can automatically adjust the voltage level of the respiratory signal between the first and second voltages, allowing the liquid crystal antenna 110 to continuously output the millimeter-wave detection signal S1, thereby achieving continuous monitoring of the subject 900.

[0062] The biosignal detection system 100 of this case monitors the physiological characteristics of the subject 900 via the millimeter wave detection signal S1. No lenses or other imaging technologies are required. As long as the millimeter wave physiological signal R1 can be effectively received, the physiological characteristics of the subject 900 can be continuously monitored. Therefore, the biosignal detection system 100 can be installed in a hidden place or anywhere that can effectively transmit and receive millimeter wave signals, achieving a flexible installation effect.

[0063] Although the above embodiments disclose specific embodiments of the present invention, they are not intended to limit the present invention. Persons with ordinary knowledge in the technical field to which the present invention belongs may make various changes and modifications without departing from the principles and spirit of the present invention. Therefore, the scope of protection of the present invention shall be based on that defined by the accompanying patent application.

[0064] Explanation of symbols

[0065] 100: Biological signal detection system

[0066] 110: Liquid crystal antenna

[0067] 111: Gate Driver

[0068] 113: Source Driver

[0069] 120: First Device

[0070] 121: Receiving antenna

[0071] 123: Second processor

[0072] 130: First processor

[0073] 140: Second Device

[0074] 141: Filter circuit

[0075] 143: Third processor

[0076] 145: Deflector

[0077] 147: Converter

[0078] 900: Test subject

[0079] S1: millimeter wave detection signal

[0080] R1: Millimeter-wave physiological signals

[0081] P1: Holographic pattern

[0082] P2: Holographic pattern

[0083] 310: Pitch angle signal field diagram

[0084] 320: Horizontal angle signal field diagram

[0085] 1411, 1412: First filter

[0086] 1413, 1414: Second filter

[0087] 1415, 1416: Regulator

[0088] RD: Read signal

[0089] SD: Adjust signal

[0090] WD: Write signal

[0091] T1: Time interval

[0092] SF: Start signal

[0093] VS: Gate signal

[0094] HS: Source signal

[0095] data1: write signal

[0096] G1: gate signal

[0097] 700: Biosignal Detection Methods

[0098] 710-760: Steps

Claims

1. A biological signal detection system comprising: a liquid crystal antenna configured to form a holographic pattern according to a setting signal and output a millimeter-wave detection signal from a specific angle, wherein the millimeter-wave detection signal is reflected as a millimeter-wave physiological signal according to the physiological characteristics of the subject; a receiving antenna, for receiving the millimeter wave physiological signal; a first processor configured to adjust the specific angle of the liquid crystal antenna according to the intensity of the millimeter-wave physiological signal, wherein the holographic pattern is related to the specific angle; a second processor coupled to the receiving antenna and configured to determine whether the respiration signal of the millimeter-wave physiological signal is between a first voltage and a second voltage, wherein the second voltage is greater than the first voltage; as well as The filter circuit is configured to perform high-pass filtering and low-pass filtering and adjust the voltage level of the breathing signal according to the breathing signal, wherein when the voltage level of the breathing signal is less than the second voltage, the liquid crystal antenna continues to output the millimeter wave detection signal. The first processor outputs a read signal, wherein the biological signal detection system further comprises: a third processor, configured to output an adjustment signal according to the read signal; a shifter, configured to output a gate signal according to the adjustment signal; and The converter is used for outputting a source signal according to the adjustment signal, wherein the source signal includes a write signal. 2 . The biological signal detection system as claimed in claim 1 , wherein when the voltage level of the breathing signal is greater than the first voltage, the liquid crystal antenna continues to output the millimeter wave detection signal.

3. The biological signal detection system of claim 1 , wherein the setting signal comprises the gate signal and the source signal, wherein the liquid crystal antenna comprises: a gate driver for receiving the gate signal; and The source driver is used for receiving the source signal, wherein the gate driver and the source driver form the holographic pattern according to the gate signal and the source signal. 4 . The biological signal detection system as claimed in claim 3 , wherein the write signal output by the converter comprises a plurality of data signals, wherein the data signals are associated with data voltage ranges.

5. A biological signal detection method comprising: The liquid crystal antenna forms a holographic pattern according to a setting signal and outputs a millimeter wave detection signal from a specific angle, wherein the millimeter wave detection signal is reflected as a millimeter wave physiological signal according to the physiological characteristics of the subject; receiving the millimeter wave physiological signal by a receiving antenna; The first processor adjusts the specific angle of the liquid crystal antenna according to the intensity of the millimeter wave physiological signal, wherein the holographic pattern is related to the specific angle; determining, by a second processor, whether a respiration signal of the millimeter-wave physiological signal is between a first voltage and a second voltage, wherein the second voltage is greater than the first voltage; The filtering circuit performs high-pass filtering and low-pass filtering, and adjusts the voltage level of the breathing signal according to the breathing signal; as well as When the voltage level of the breathing signal is lower than the second voltage, the liquid crystal antenna continuously outputs the millimeter wave detection signal. The biological signal detection method further comprises: Outputting a read signal by the first processor; Outputting an adjustment signal by a third processor according to the read signal; The shifter outputs a gate signal according to the adjustment signal; and The converter outputs a source signal according to the adjustment signal, wherein the source signal includes a write signal.

6. The biological signal detection method according to claim 5, further comprising: When the voltage level of the breathing signal is greater than the first voltage, the liquid crystal antenna continuously outputs the millimeter wave detection signal.

7. The biological signal detection method according to claim 5, further comprising: The gate driver of the liquid crystal antenna receives the gate signal, wherein the setting signal includes the gate signal and the source signal; and The source driver of the liquid crystal antenna receives the source signal, wherein the gate driver and the source driver form the holographic pattern according to the gate signal and the source signal. 8 . The biosignal detection method as claimed in claim 7 , wherein the write signal output by the converter comprises a plurality of data signals, wherein the data signals are associated with a data voltage range.

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