Respiration monitoring method, system, wireless device and computer-readable storage medium

Abstract

The present application provides a respiratory monitoring method, system, wireless device and computer-readable storage medium, which relate to the field of human body monitoring technology. When applied to a wireless transmitting end, the method includes: transmitting a first beam to a wireless receiving end based on multi-beam technology, and transmitting a second beam to a human being under test; receiving signal difference information fed back by the wireless receiving end based on the first beam and the second beam; performing signal compensation on the first beam and the second beam based on the signal difference information, and obtaining a third beam and a fourth beam for respiratory monitoring. When applied to a wireless receiving end, the method includes: determining the signal difference information between the first beam transmitted by the receiving wireless transmitting end and the second beam reflected by the human being under test; obtaining a coherent signal based on the received third beam and fourth beam, wherein the third beam and the fourth beam are beams transmitted by the wireless transmitting end after performing signal compensation on the first beam and the second beam based on the signal difference information; and determining the respiratory frequency of the human being under test based on the coherent signal.

Description

Technical Field

[0001] The present application relates to the technical field of human body monitoring, and in particular to a respiratory monitoring method, system, wireless device, and computer-readable storage medium. Background Art

[0002] Monitoring human respiratory status is a common requirement in scenarios such as ward care and elderly care. Currently, the primary method for monitoring respiratory status, such as wearable sensors, is contact monitoring. However, this method requires sensors to be attached to the body, which can interfere with a person's rest. Furthermore, contact monitoring methods involve frequent contact between patients and medical staff, posing the risk of spreading the epidemic.

[0003] Currently, to address the aforementioned issues with contact-based monitoring methods, non-contact monitoring methods using wireless signals are commonly used. Human respiration perturbs electromagnetic waves passing through the body's surface. By receiving the electromagnetic waves reflected by the body and extracting this perturbation signal, the human respiratory rate can be determined, enabling non-contact respiratory monitoring. However, because the perturbation signal caused by respiration is relatively weak, it is easily overwhelmed by various interferences and background noise, resulting in low measurement accuracy and stability, and thus poor monitoring of human respiratory status. Summary of the Invention

[0004] In view of this, the purpose of the embodiments of the present application is to provide a respiratory monitoring method, system, wireless device and computer-readable storage medium to improve the problem of poor monitoring effect of human respiratory conditions in the prior art.

[0005] In order to solve the above problems, in a first aspect, an embodiment of the present application provides a respiratory monitoring method applied to a wireless transmitter, the method comprising:

[0006] Based on the multi-beam technology, the first beam is transmitted to the wireless receiving end, and the second beam is transmitted to the human body under test;

[0007] receiving signal difference information fed back by the wireless receiving end according to the first beam and the second beam;

[0008] Signal compensation is performed on the first beam and the second beam based on the signal difference information to obtain a third beam and a fourth beam for performing respiration monitoring.

[0009] In the above implementation process, the wireless transmitter can transmit two non-interfering beams to the receiver and the human body respectively based on multi-beam technology, and receive the signal difference information determined by the wireless receiver based on the two beams, thereby performing signal compensation on the two beams in the wireless transmitter, that is, in the signal source, to compensate for the amplitude and / or phase of the two beams, thereby obtaining the third beam and the fourth beam for respiratory monitoring. By performing signal compensation on the direct beam and the reflected beam, the signal difference between the two beams can be effectively reduced, thereby increasing the strength of the coherent signal when coherent monitoring is performed based on the two beams, thereby improving the accuracy and stability of monitoring human respiration and improving the monitoring effect of human respiration.

[0010] Optionally, transmitting a first beam to a wireless receiving end and transmitting a second beam to a human being under test based on a multi-beam technology includes:

[0011] Based on the multi-beam technology, create the first beam in a first direction according to the first position of the wireless receiving end, so as to directly transmit the first beam to the wireless receiving end;

[0012] The second beam in the second direction is created according to the first position and the second position of the human body to be measured, so as to transmit the second beam to the human body to be measured, so that the second beam is reflected from the human body to be measured to the wireless receiving end.

[0013] In the above implementation, the disturbance signal generated by human breathing on electromagnetic waves passing through the human body surface is relatively weak. Therefore, to increase the strength of the disturbance signal, two mutually non-interfering beams can be created in different directions, with the wireless receiving end and the human body being measured as the receiving objects. This allows the wireless receiving end to receive both the first beam transmitted directly and the second beam reflected from the human body. Multiple antennas are then used to transmit and receive the first and second beams, respectively, to offset the interference caused by time-varying fading in the wireless signal on the disturbance signal caused by human breathing, thereby increasing the strength of the disturbance signal in the second beam.

[0014] Optionally, the signal difference information includes amplitude difference information between the first beam and the second beam; and performing signal compensation on the first beam and the second beam based on the signal difference information to obtain the third beam and the fourth beam includes:

[0015] Based on the amplitude difference information, obtaining a first amplitude characteristic when the first beam is received by the wireless receiving end, and a second amplitude characteristic when the second beam is received by the wireless receiving end;

[0016] adjusting the first transmit power of the subcarriers in the first beam according to the first amplitude characteristic to obtain the third beam;

[0017] The second transmission power of the subcarriers in the second beam is adjusted according to the second amplitude characteristic to obtain the fourth beam, so that the adjustment amplitude difference information between the third beam and the fourth beam when received by the wireless receiving end meets the first difference range.

[0018] In the above implementation process, the signal difference information may include the amplitude difference information between the amplitude characteristics of the first beam and the second beam. Therefore, the amplitude characteristics of the two beams when they are received can be determined based on the amplitude difference information fed back from the wireless receiving end. The transmit power of each subcarrier of the two beams is adjusted based on their respective amplitude characteristics, so that when the adjusted third and fourth beams are received by the wireless receiving end, the difference between the amplitudes of the two beams is small, that is, the amplitude difference satisfies the first difference range, so that the amplitude characteristics of the third and fourth beams when received by the wireless receiving end are substantially equal. This effectively eliminates the difference in transmit power between the subcarriers of the two beams, thereby improving the strength of the coherent signal when coherent monitoring is performed based on the two beams, and further improving the accuracy and stability of monitoring human respiration based on the coherent signal.

[0019] Optionally, the signal difference information includes phase difference information between the first beam and the second beam; and performing signal compensation on the first beam and the second beam based on the signal difference information to obtain the third beam and the fourth beam includes:

[0020] Based on the phase difference information, obtaining a path phase difference and a periodic phase difference between the first beam and the second beam when received by the wireless receiving end;

[0021] adjusting the phase of the first beam according to the path phase difference and the periodic phase difference to obtain the third beam;

[0022] The phase of the second beam is adjusted according to the path phase difference and the periodic phase difference to obtain the fourth beam, so that the adjusted phase difference information of the third beam and the fourth beam when received by the wireless receiving end meets the second difference range.

[0023] In the above implementation process, the signal difference information may also include phase difference information between the first beam and the second beam. Therefore, the path phase difference and periodic phase difference when the two beams are received can be determined based on the phase difference information fed back from the wireless receiving end. The phases of the two beams are adjusted based on their respective path phase difference and periodic phase difference, so that when the adjusted third and fourth beams are received by the wireless receiving end, the difference between the phases of the two beams is small, that is, the phase difference satisfies the second difference range, so that the phases of the third and fourth beams are substantially equal when received by the wireless receiving end. This effectively eliminates the phase difference between the two beams, thereby improving the strength of the coherent signal when coherent monitoring is performed based on the two beams, and further improving the accuracy and stability of monitoring human respiration based on the coherent signal.

[0024] Optionally, the method further includes:

[0025] Transmitting the third beam directly to the wireless receiving end;

[0026] The fourth beam is transmitted to the human body under test, so that the fourth beam is reflected from the human body under test to the wireless receiving end.

[0027] In the above implementation process, after the wireless transmitter performs signal compensation on the first and second beams based on the signal difference information fed back from the wireless receiver to obtain the corresponding third and fourth beams, the third beam can be directly transmitted to the wireless receiver using the first beam transmission method, and the fourth beam can be transmitted to the human body under test using the second beam transmission method, so that the fourth beam can be reflected and received by the wireless receiver. The wireless receiver can receive the third and fourth beams respectively and perform subsequent coherent monitoring processing based on the third and fourth beams to monitor human breathing conditions.

[0028] In a second aspect, an embodiment of the present application further provides a respiratory monitoring method, applied to a wireless receiving end, the method comprising:

[0029] Determine signal difference information between a first beam transmitted by a received wireless transmitting end and a second beam reflected by a measured human body;

[0030] Obtaining a coherent signal according to the received third beam and fourth beam, wherein the third beam and the fourth beam are beams transmitted by the wireless transmitting end after performing signal compensation on the first beam and the second beam based on the signal difference information;

[0031] The respiratory frequency of the measured human body is determined based on the coherent signal.

[0032] In the above implementation process, the wireless receiving end receives the first beam directly transmitted from the wireless transmitting end and the second beam reflected from the human body being measured, and determines the signal difference information between the two beams, so that the wireless transmitting end can perform signal compensation on the first beam and the second beam based on the signal difference information to receive the compensated third beam and fourth beam. By performing coherent monitoring processing on the third beam and the fourth beam, a corresponding coherent signal can be obtained, and the respiratory rate of the human body being measured can be calculated based on the coherent signal to achieve monitoring of the human body's respiratory condition. Corresponding coherent processing is performed on the third beam and the fourth beam after signal compensation, which effectively improves the strength of the coherent signal, thereby improving the accuracy of the calculated respiratory rate, thereby improving the accuracy and stability of human respiratory monitoring.

[0033] Optionally, the signal difference information includes amplitude difference information between the first beam and the second beam; and the determining of the signal difference information between the first beam transmitted by the received wireless transmitting end and the second beam reflected by the measured human body includes:

[0034] receiving a first beam transmitted by the wireless transmitting end and a second beam reflected by the measured human body;

[0035] determining a first amplitude characteristic of subcarriers of the first beam and a second amplitude characteristic of subcarriers of the second beam;

[0036] Amplitude difference information between the first beam and the second beam is determined based on the first amplitude characteristic and the second amplitude characteristic.

[0037] In the above implementation, because the power of each subcarrier in the first and second beams differs when transmitted, the amplitude characteristics of the two beams when received by the wireless receiver may also differ. By monitoring the amplitude characteristics of the received first and second beams, the amplitude difference information of the two beams when received can be determined based on the amplitude characteristics, which serves as the corresponding signal difference information. This allows the wireless transmitter to compensate for the difference in transmit power of each subcarrier between the two beams based on the amplitude difference information, thereby reducing the amplitude difference between the received third and fourth beams and improving the signal strength of the coherent signal.

[0038] Optionally, the signal difference information includes phase difference information between the first beam and the second beam; and the determining of the signal difference information between the first beam transmitted by the received wireless transmitting end and the second beam reflected by the measured human body includes:

[0039] receiving a first beam transmitted by the wireless transmitting end and a second beam reflected by the measured human body;

[0040] determining a path phase difference generated by a difference in transmission path length between the first beam and the second beam;

[0041] A periodic phase difference between the first beam and the second beam generated based on the periodic vibration of the measured human body during breathing is determined, and the path phase difference and the periodic phase difference are used as the phase difference information.

[0042] In the above implementation, because the first and second beams travel different paths during transmission, their phases may also differ when received by the wireless receiver. By monitoring the phase difference between the received first and second beams due to their different paths, as well as the periodic phase difference due to the periodic vibrations of the measured human body during breathing, the phase difference information of the two beams when received can be determined as the corresponding signal difference information. This allows the wireless transmitter to compensate for the difference in transmission phase between the two beams based on the phase difference information, thereby reducing the fixed phase difference between the received third and fourth beams due to their different paths, preserving the periodic phase difference caused by the human body's periodic vibrations, and improving the signal strength of the coherent signal.

[0043] Optionally, obtaining a coherent signal according to the received third beam and fourth beam includes:

[0044] determining a first subcarrier set according to the received third beam, and determining a second subcarrier set according to the received fourth beam;

[0045] The first subcarrier set and the second subcarrier set are coherently processed to obtain the coherent signal.

[0046] In the above implementation, the wireless receiving end can establish a coherent monitoring system based on the third and fourth beams used for signal compensation, respectively obtaining a set of multiple subcarriers in each beam, and then performing coherent processing based on the two subcarrier sets to obtain corresponding coherent signals. By coherently processing the two beams, the adverse effects of the disturbance signal caused by human breathing on electromagnetic waves during time-varying fading in the wireless channel can be offset, thereby increasing the strength and quality of the disturbance signal and improving the measurement accuracy and stability when monitoring human breathing.

[0047] Optionally, determining the respiratory frequency of the measured human body based on the coherent signal includes:

[0048] Determining the signal strength of each subcarrier in the coherent signal;

[0049] The respiratory rate of the measured human body is determined based on the signal strength.

[0050] In the above implementation, the signal strength of each subcarrier can be determined based on the subcarrier frequency domain analysis of the coherent signal. This allows the weak disturbance signal of human respiration to be extracted from the subcarrier signal strength. The respiratory frequency is then extracted and averaged, thereby determining the respiratory frequency of the person being measured. This conversion of the periodic disturbance of the wireless signal caused by human respiration into periodic variations in the amplitude of the coherent signal effectively improves the signal-to-noise ratio during processing and the accuracy of the extracted respiratory frequency, thereby enhancing the monitoring of human respiration.

[0051] In a third aspect, an embodiment of the present application further provides a respiratory monitoring system, the system comprising a wireless transmitter and a wireless receiver;

[0052] The wireless transmitting end is used to transmit a first beam to the wireless receiving end and transmit a second beam to the human body under test based on multi-beam technology;

[0053] The wireless receiving end is used to determine signal difference information between a first beam transmitted by the wireless transmitting end and a second beam reflected by the measured human body;

[0054] The wireless transmitting end is further configured to receive signal difference information fed back by the wireless receiving end based on the first beam and the second beam; perform signal compensation on the first beam and the second beam based on the signal difference information to obtain a third beam and a fourth beam for respiratory monitoring;

[0055] The wireless receiving end is further used to obtain a coherent signal based on the third beam and the fourth beam received by the wireless transmitting end after signal compensation based on the signal difference information; and determine the breathing frequency of the human body being measured based on the coherent signal.

[0056] In a fourth aspect, an embodiment of the present application further provides a wireless device, comprising a memory and a processor, wherein the memory stores program instructions, and when the processor reads and runs the program instructions, it executes the steps in any implementation of the above-mentioned respiratory monitoring method.

[0057] In a fifth aspect, an embodiment of the present application further provides a computer-readable storage medium, wherein the computer program instructions are stored in the computer-readable storage medium. When the computer program instructions are read and executed by a processor, the steps in any implementation of the above-mentioned respiratory monitoring method are executed.

[0058] In summary, the present application provides a respiratory monitoring method, system, wireless device, and computer-readable storage medium. Coherent monitoring is performed using two beams, one transmitted from a wireless transmitter to a wireless receiver and the other reflected from a human body to the wireless receiver. The system extracts the human respiratory rate based on the coherent signal, and uses signal compensation to reduce the signal difference between the two beams and increase the strength of the coherent signal, thereby improving the accuracy and stability of human respiratory monitoring and enhancing the effectiveness of monitoring human respiratory conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0060] Figure 1 A schematic diagram of the environmental operation of a respiratory monitoring system provided in an embodiment of the present application;

[0061] Figure 2 A flow chart of a respiratory monitoring method applied to a respiratory monitoring system provided in an embodiment of the present application;

[0062] Figure 3 A flowchart of a respiratory monitoring method applied to a wireless transmitter provided in an embodiment of the present application;

[0063] Figure 4 A detailed flowchart of step S400 provided in an embodiment of the present application;

[0064] Figure 5 A detailed flowchart of step S600 provided in an embodiment of the present application;

[0065] Figure 6 A detailed flowchart of another step S600 provided in an embodiment of the present application;

[0066] Figure 7 A flowchart of a respiratory monitoring method applied to a wireless receiving end provided in an embodiment of the present application;

[0067] Figure 8 A detailed flowchart of step S700 provided in an embodiment of the present application;

[0068] Figure 9 A detailed flowchart of another step S700 provided in an embodiment of the present application;

[0069] Figure 10A detailed flowchart of step S800 provided in an embodiment of the present application;

[0070] Figure 11 A detailed flowchart of step S900 provided in an embodiment of the present application.

[0071] Icon: 110-wireless transmitter; 120-wireless receiver; 200-human body under test. DETAILED DESCRIPTION

[0072] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of them. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the embodiments of the present application.

[0073] When monitoring human respiration, contact monitoring requires contact with the person being measured, for example, by attaching sensors and other monitoring equipment to the person's body. These devices can also disrupt the person's rest. Furthermore, during the installation and acquisition of the monitoring equipment, medical staff come into close contact with the person being measured, posing a risk of spreading the disease when an infectious epidemic is present.

[0074] Therefore, to minimize the impact of respiratory monitoring on the person being monitored and the risk of epidemic transmission, non-contact monitoring methods using wireless signals are often used to monitor human respiratory conditions. Human respiration disturbs electromagnetic waves passing through the human surface. This non-contact monitoring method typically samples the electromagnetic waves reflected by the human body to obtain the human respiratory frequency from the disturbance signal, thus achieving non-contact respiratory monitoring. However, since the disturbance signal caused by human respiration is relatively weak, it is easily overwhelmed by various interferences and background noise, resulting in low measurement accuracy and stability, and thus poor monitoring of human respiratory conditions.

[0075] In order to solve the above problems, the present invention provides a respiratory monitoring method, which is applied to a respiratory monitoring system. Figure 1 , Figure 1 The following is a schematic diagram of the operating environment of a respiratory monitoring system provided in an embodiment of the present application. The respiratory monitoring system may include: a wireless transmitter 110 and a wireless receiver 120. The wireless transmitter 110 and the wireless receiver 120 are connected via a network communication.

[0076] The wireless transmitting end 110 is configured to transmit a first beam to the wireless receiving end 120 and a second beam to the human body 200 under test based on the multi-beam technology;

[0077] The wireless receiving end 120 is used to determine the signal difference information between the first beam transmitted by the wireless transmitting end 110 and the second beam reflected by the human body 200 under test;

[0078] The wireless transmitting end 110 is further configured to receive signal difference information fed back by the wireless receiving end 120 based on the first beam and the second beam; perform signal compensation on the first beam and the second beam based on the signal difference information to obtain a third beam and a fourth beam for respiratory monitoring;

[0079] The wireless receiving end 120 is further configured to obtain a coherent signal based on the third beam and the fourth beam after signal compensation based on the signal difference information received by the wireless transmitting end 110; and determine the respiratory frequency of the measured human body 200 based on the coherent signal.

[0080] In an optional embodiment, the wireless transmitting end 110 is also used to create a first beam in a first direction based on the first position of the wireless receiving end 120 based on multi-beam technology, so as to transmit the first beam directly to the wireless receiving end 120; and create a second beam in a second direction based on the first position and the second position of the human body under test 200, so as to transmit the second beam to the human body under test 200, so that the second beam is reflected from the human body under test 200 to the wireless receiving end 120.

[0081] In an optional embodiment, the wireless receiving end 120 is further configured to receive the first beam transmitted by the wireless transmitting end 110 and the second beam reflected by the measured human body 200;

[0082] Determining a first amplitude characteristic of a subcarrier of a first beam and a second amplitude characteristic of a subcarrier of a second beam; determining amplitude difference information between the first beam and the second beam based on the first amplitude characteristic and the second amplitude characteristic;

[0083] Or, determine the path phase difference generated by the difference in transmission path length between the first beam and the second beam; determine the periodic phase difference generated by the periodic vibration of the first beam and the second beam during breathing of the measured human body 200, and use the path phase difference and the periodic phase difference as phase difference information.

[0084] In an optional embodiment, the wireless transmitting end 110 is further configured to obtain, based on the amplitude difference information, a first amplitude characteristic of the first beam when received by the wireless receiving end 120, and a second amplitude characteristic of the second beam when received by the wireless receiving end 120; adjust the first transmit power of the subcarriers in the first beam according to the first amplitude characteristic to obtain a third beam; and adjust the second transmit power of the subcarriers in the second beam according to the second amplitude characteristic to obtain a fourth beam, so that the adjusted amplitude difference information between the third beam and the fourth beam when received by the wireless receiving end 120 satisfies a first difference range;

[0085] Or, based on the phase difference information, obtain the path phase difference and periodic phase difference between the first beam and the second beam when they are received by the wireless receiving end 120; adjust the phase of the first beam according to the path phase difference and the periodic phase difference to obtain a third beam; adjust the phase of the second beam according to the path phase difference and the periodic phase difference to obtain a fourth beam, so that the adjusted phase difference information between the third beam and the fourth beam when they are received by the wireless receiving end 120 satisfies the second difference range.

[0086] In an optional embodiment, the wireless transmitting end 110 is further configured to transmit the third beam directly to the wireless receiving end 120 ; and transmit the fourth beam to the human body 200 to be measured, so that the fourth beam is reflected from the human body 200 to the wireless receiving end 120 .

[0087] In an optional embodiment, the wireless receiving end 120 is further used to determine a first subcarrier set based on the received third beam, and determine a second subcarrier set based on the received fourth beam; and coherently process the first subcarrier set and the second subcarrier set to obtain a coherent signal.

[0088] In an optional implementation, the wireless receiving end 120 is further configured to determine the signal strength of each subcarrier in the coherent signal; and determine the respiratory frequency of the measured human body 200 based on the signal strength.

[0089] Optionally, the wireless transmitting end 110 can be various types of wireless switches, which may include APs (Access Points) of various wireless networks, such as WiFi6 APs, etc., with the beamforming function of MU-MIMO (Multi-User Multiple-Input Multiple-Output) multi-beam technology, and the signal can cover the entire indoor environment. The wireless receiving end 120 can be various types of WiFi terminal devices, which can use the principle of coherent superposition of electromagnetic waves to measure the human breathing rate based on the received signal. The wireless transmitting end 110 and the wireless receiving end 120 can be multi-antenna devices, and the wireless transmitting end 110 can determine the transmission weights of each antenna according to the direction and position of the wireless receiving end 120 and the human body 200 being measured. The signals sent to the wireless receiving end 120 and the human body being measured 200 can generate directional beams by multiplying the transmission weights of these antennas.

[0090] For example, various devices for installing human bodies, such as the bed where the human body 200 is located, can be set at various locations in the room. In order to improve the effectiveness of monitoring human breathing, the wireless transmitting end 110 and the wireless receiving end 120 can be installed on both sides of the bed or other devices, so that there is a direct path between the wireless transmitting end 110 and the wireless receiving end 120. The wireless transmitting end 110 and the wireless receiving end 120 can also establish a reflection path through reflection of the human body 200 being measured.

[0091] See also Figure 2 , Figure 2 A flowchart of a respiratory monitoring method applied to a respiratory monitoring system provided in an embodiment of the present application is provided. The method may include steps S310-S340.

[0092] Step S310: transmitting a first beam to a wireless receiving end and transmitting a second beam to a human body under test through a wireless transmitting end based on a multi-beam technology.

[0093] Step S320: determining, through the wireless receiving end, signal difference information between a first beam transmitted by the wireless transmitting end and a second beam reflected by the human body under test.

[0094] Step S330: receiving, through the wireless transmitting end, the signal difference information fed back by the wireless receiving end based on the first beam and the second beam; performing signal compensation on the first beam and the second beam based on the signal difference information to obtain the third beam and the fourth beam for respiratory monitoring.

[0095] Step S340: obtaining a coherent signal through the wireless receiving end based on the third beam and the fourth beam after signal compensation based on the signal difference information received by the wireless transmitting end; and determining the respiratory frequency of the human body under test based on the coherent signal.

[0096] exist Figure 2 In the illustrated embodiment, a wireless transmitter uses multi-beam technology to directly transmit a beam to a wireless receiver and reflect a beam from the subject. Based on information difference feedback from the wireless receiver, the two beams are compensated to obtain third and fourth beams with smaller information differences. This enables the wireless receiver to perform coherent monitoring based on the third and fourth beams based on the principle of coherent superposition, thereby converting the weak disturbance signal generated by the subject's breathing into a coherent signal with a stronger signal strength, and determining the subject's respiratory rate from the coherent signal. This effectively improves the anti-interference capability, measurement accuracy, and stability of non-contact respiratory monitoring, thereby enhancing the effectiveness of human respiration monitoring.

[0097] See also Figure 3 , Figure 3A flowchart of a respiratory monitoring method applied to a wireless transmitter is provided in an embodiment of the present application. The method may include steps S400-S600.

[0098] Step S400: transmitting a first beam to a wireless receiving end and transmitting a second beam to a human body under test based on a multi-beam technology.

[0099] Among them, multi-beam technology, such as MU-MIMO technology, is a technology that can use multiple antennas between the wireless transmitter and the wireless receiver to obtain diversity gain, improve spectrum utilization, and reduce co-channel interference between different signals. Based on multi-beam technology, the wireless transmitter can allocate corresponding downlink beams to the wireless receiver and the human being being measured, respectively, transmitting the first beam directly toward the wireless receiver and the second beam toward the human being being measured, so that the second beam can be reflected from the human being being measured to the wireless receiver.

[0100] Optionally, when performing dual-beam transmission, the first beam and the second beam can send the same data code stream and use the same configuration parameters, such as the same physical layer prefix, OFDM (Orthogonal Frequency Division Multiplexing) modulation method, coding rate, etc., to reduce the signal difference between the two beams.

[0101] Step S500: receiving signal difference information fed back by the wireless receiving end based on the first beam and the second beam.

[0102] Among them, the wireless receiving end can perform calculations based on the direct first beam and the reflected second beam to determine the signal difference information between the two beams, and report the signal difference information to the wireless transmitting end so that the wireless transmitting end can receive its feedback signal difference information.

[0103] Step S600 : performing signal compensation on the first beam and the second beam based on signal difference information to obtain a third beam and a fourth beam for performing respiratory monitoring.

[0104] Among them, in order to reduce the signal difference between the two beams received in the wireless receiving end and improve the strength of the coherent signal, the wireless transmitter can be used to compensate the two beams in amplitude and / or phase at the signal source according to the signal difference information between the two beams to reduce the signal difference between the beams and obtain the corresponding third beam and fourth beam.

[0105] exist Figure 3In the embodiment shown, by performing signal compensation on the direct beam and the reflected beam, the signal difference between the two beams can be effectively reduced, thereby improving the strength of the coherent signal when coherent monitoring is performed based on the two beams, thereby improving the accuracy and stability when monitoring human breathing, and improving the monitoring effect of human breathing conditions.

[0106] Optionally, see Figure 4 , Figure 4 A detailed flow chart of step S400 is provided in an embodiment of the present application. The method may further include steps S410-S420.

[0107] Step S410 : Based on the multi-beam technology, create a first beam in a first direction according to the first position of the wireless receiving end, so as to transmit the first beam directly to the wireless receiving end.

[0108] Among them, the disturbance signal generated by human breathing on the electromagnetic waves passing through the human body surface is relatively weak. Therefore, in order to increase the strength of the disturbance signal, the wireless receiving end and the human body under test can be used as the receiving objects respectively, and two non-interfering beams in different directions can be created. The wireless transmitting end can allocate two downlink beams, pointing to the positions of the wireless receiving end and the human body under test respectively. In order to find the two beam directions pointing to the human body and the wireless receiving end respectively, first, the wireless transmitting end can start the beam search process based on the multi-beam technology. The first direction of the AP pointing to the wireless receiving end can be determined first. For example, the MU-MIMO beam measurement process can be used. The AP determines the first direction pointing to the wireless receiving end based on the beamforming feedback result reported by the wireless receiving end, thereby creating the corresponding first beam and transmitting the first beam directly to the wireless receiving end.

[0109] Step S410 , creating a second beam in a second direction according to the first position and the second position of the human body to be measured, transmitting the second beam to the human body to be measured, and reflecting the second beam from the human body to the wireless receiving end.

[0110] The AP can then determine a second direction toward the subject. In scenarios like hospital rooms and home care, the subject's position is typically fixed, such as a bed. Therefore, a WiFi terminal can be placed at the bed to complete the AP's beam measurement of the subject, determine the second direction toward the bed, and create a corresponding second beam. The second beam is then transmitted toward the subject, where it is reflected by the subject to the wireless receiver.

[0111] exist Figure 4 In the illustrated embodiment, multiple antennas can be used to transmit and receive the first beam and the second beam respectively, so as to offset the interference caused by the disturbance signal of human breathing caused by time-varying fading in the wireless signal, thereby increasing the strength of the disturbance signal in the second beam.

[0112] Optionally, the signal difference information includes amplitude difference information between the first beam and the second beam; see Figure 5 , Figure 5 A detailed flow chart of step S600 is provided in an embodiment of the present application. The method may further include steps S610-S630.

[0113] Step S610: Based on the amplitude difference information, a first amplitude characteristic of the first beam when received by the wireless receiving end and a second amplitude characteristic of the second beam when received by the wireless receiving end are obtained.

[0114] The amplitude difference information is the difference between the amplitude characteristics of the signal status indicators of the two beams when received by the wireless receiving end. Therefore, the wireless transmitting end can determine the first amplitude characteristic of the first beam when received by the wireless receiving end and the second amplitude characteristic of the second beam when received by the wireless receiving end based on the amplitude difference information fed back by the wireless receiving end.

[0115] Optionally, the first amplitude characteristic of the first beam can be expressed as: (||A0|| 2 ,‖A1‖ 2 ,…‖A i ‖ 2 ,…‖A N-1 ‖ 2 ), the second amplitude characteristic of the second beam can be expressed as: (‖A′0‖ 2 ,‖A′1‖ 2 ,…‖A′ i ‖ 2 ,…‖A′ N-1 ‖ 2 ), where ‖A i ‖ 2 Indicates the power of the i-th subcarrier in the beam.

[0116] Step S620: Adjust the first transmit power of the subcarriers in the first beam according to the first amplitude characteristic to obtain a third beam.

[0117] The first transmit power of the subcarrier in the first beam can be adjusted according to the current first amplitude feature and the second amplitude feature, thereby adjusting the size of the subcarrier amplitude, for example, adjusting it to (α0, α1, ... α i ,…α N-1 ), thereby obtaining the adjusted third beam.

[0118] Step S630: Adjust the second transmit power of the subcarriers in the second beam according to the second amplitude characteristic to obtain a fourth beam.

[0119] Among them, the second transmit power of the subcarrier in the second beam can be adjusted according to the current second amplitude feature in combination with the first amplitude feature, thereby adjusting the size of the subcarrier amplitude, for example, adjusting it to (α′0, α′1, … α′ i ,…α′ N-1 ), thereby obtaining the adjusted fourth beam.

[0120] It is worth noting that when the first transmission power and the second transmission power of each subcarrier are adjusted, the subcarrier amplitude α of the third beam can be adjusted. i and the subcarrier amplitude α′ of the fourth beam i satisfy: To ensure that the third and fourth beams reach the wireless receiving end, that is, the adjusted amplitude difference information when the wireless receiving end receives the third and fourth beams satisfies the first difference range, the first difference range can be set to a smaller amplitude difference range to ensure that the amplitudes of the corresponding subcarriers in the two beams are substantially equal, thereby compensating the transmit power of the subcarriers in the two beams. For example, if the transmit powers of the first and second beams received by the receiver were originally -60dBm and -70dBm, respectively, after the wireless transmitting end performs beam power compensation, the transmit powers of the third and fourth beams are both -70dBm.

[0121] For example, the amplitude C of the subcarrier of the ith wave in the third beam can be set to i =α i A i , the amplitude C of the subcarrier of the ith wave in the fourth beam i ′=α′ i A′ i , then we can make α′ i A′ i =α i A i .

[0122] Optionally, when the adjustment amplitude difference information of the third beam and the fourth beam does not satisfy the first difference range, the transmission power of each subcarrier of the third beam and the fourth beam can be further adjusted so that the adjustment amplitude difference information satisfies the first difference range.

[0123] exist Figure 5 In the embodiment shown, by compensating the power of the beams, the difference in transmission power between the two beams is effectively eliminated, so as to improve the strength of the coherent signal when coherent monitoring is performed based on the two beams, and further improve the accuracy and stability when monitoring human breathing based on the coherent signal.

[0124] Optionally, the signal difference information includes phase difference information between the first beam and the second beam; see Figure 6 , Figure 6Another detailed flowchart of step S600 provided in an embodiment of the present application, the method may further include steps S640-S660.

[0125] Step S640: Based on the phase difference information, obtain the path phase difference and the periodic phase difference between the first beam and the second beam when they are received by the wireless receiving end.

[0126] Since the transmission paths of the two beams may have different lengths, the phase difference information may include the path phase difference between the first beam and the second beam caused by the length of the transmission path, as well as the periodic phase difference between the two beams caused by the periodic vibration of human breathing. The periodic phase difference in the i-th subcarrier can be denoted as θ i sin 2πft,θ i is the variation of the phase difference of the ith subcarrier caused by breathing, and the fixed phase difference caused by the path difference is recorded as The path difference between the first beam and the second beam is Δl, and λ is the radio frequency carrier wavelength of WiFi.

[0127] Step S650: Adjust the phase of the first beam according to the path phase difference and the periodic phase difference to obtain a third beam.

[0128] Step S660: Adjust the phase of the second beam according to the path phase difference and the periodic phase difference to obtain a fourth beam.

[0129] Among them, since the phase difference will have an adverse effect on the coherent signal, that is, the signal strength of the coherent signal on each subcarrier will produce corresponding changes in the phase difference, therefore, the phase of the first beam and / or the second beam can be adjusted according to the path phase difference and the periodic phase difference to eliminate the phase difference between the two beams, thereby obtaining the third beam and the fourth beam, so that the adjusted phase difference information of the third beam and the fourth beam when received by the wireless receiving end satisfies the second difference range. The second difference range can be set to a smaller phase difference range so that the phases of the corresponding subcarriers in the two beams are basically equal, thereby achieving compensation for the phases of the subcarriers in the two beams.

[0130] It should be noted that compensation can be adjusted according to the path phase difference. For example, the path length difference between the first beam and the second beam is Δl = 0.5m, and the WiFi6 AP uses a 5.5GHz operating frequency (λ = 5.5cm). The phase difference between the two beams is φ = 0.518π. Therefore, the wireless transmitter can add a phase delay φ before transmitting the second beam to obtain the corresponding third and fourth beams to eliminate the fixed phase difference between the third and fourth beams, thereby compensating for the path phase difference and converting the disturbance of the antenna signal caused by human breathing into a periodic phase difference between the two beams.

[0131] Optionally, when compensating for amplitude and phase, the first beam and / or the second beam may be compensated according to actual conditions and requirements. To improve the effect of signal compensation, the wireless transmitter may compensate for both the amplitude difference and the phase difference of the signal.

[0132] Optionally, after compensation to obtain the corresponding third and fourth beams, the third beam can be directly transmitted to a wireless receiver, and the fourth beam can be transmitted to the human subject, so that the fourth beam is reflected from the human subject to the wireless receiver. This allows the wireless receiver to receive the third and fourth beams separately and perform subsequent coherent monitoring based on the third and fourth beams, thereby monitoring human respiration.

[0133] exist Figure 6 In the embodiment shown, by compensating the phase between the beams, the phase difference between the two beams is effectively eliminated, so as to improve the strength of the coherent signal when coherent monitoring is performed based on the two beams, and further improve the accuracy and stability when monitoring human breathing based on the coherent signal.

[0134] See also Figure 7 , Figure 7 A flowchart of a respiratory monitoring method applied to a wireless receiving end is provided in an embodiment of the present application. The method may include steps S700-S900.

[0135] Step S700: determining signal difference information between a first beam transmitted by a wireless transmitting end and a second beam reflected by a human body under test.

[0136] The wireless receiving end may perform signal analysis based on the direct first beam and the reflected second beam to determine signal difference information between the two beams, and the signal difference information may include at least one of amplitude difference information or phase difference information.

[0137] Step S800: Obtain a coherent signal according to the received third beam and fourth beam.

[0138] Among them, the third beam and the fourth beam are beams transmitted by the wireless transmitter after signal compensation of the first beam and the second beam based on signal difference information; the wireless receiver can establish a coherent monitoring system based on the third beam and the fourth beam to obtain corresponding coherent signals.

[0139] Step S900: determining the respiratory frequency of the human subject based on the coherent signal.

[0140] Among them, since the weak disturbance signal caused by human breathing is converted into a coherent signal with stronger signal strength, the wireless receiving end can calculate the breathing frequency of the human body based on the coherent signal and realize the monitoring of the human breathing condition.

[0141] exist Figure 7 In the embodiment shown, corresponding coherent processing is performed on the basis of the third beam and the fourth beam after signal compensation, which effectively improves the strength of the coherent signal, thereby improving the accuracy of the calculated respiratory frequency, thereby improving the accuracy and stability of human respiratory monitoring.

[0142] Optionally, the signal difference information includes amplitude difference information between the first beam and the second beam; see Figure 8 , Figure 8 A detailed flowchart of step S700 is provided in an embodiment of the present application. The method may further include steps S710-S730.

[0143] Step S710: receiving a first beam transmitted by a wireless transmitting end and a second beam reflected by a human body under test.

[0144] The wireless receiving end can respectively receive the first beam directly emitted and the second beam reflected from the human body under test through the multiple antennas therein.

[0145] Step S720: Determine a first amplitude characteristic of the subcarriers of the first beam and a second amplitude characteristic of the subcarriers of the second beam.

[0146] Among them, the wireless receiving end can analyze and obtain the amplitude characteristics of the signal state indication CSI (Channel State Indication) of the beam. The first amplitude characteristic of the first beam can be expressed as: (‖A0‖ 2 ,‖A1‖ 2 ,…‖A i ‖ 2 ,…‖A N-1 ‖ 2 ), the second amplitude characteristic of the second beam can be expressed as: (‖A′0‖ 2 ,‖A′1‖ 2 ,…‖A′ i ‖ 2 ,…‖A′ N-1 ‖ 2 ), where ‖A i ‖ 2 Indicates the power of the i-th subcarrier in the beam.

[0147] Step S730: Determine amplitude difference information between the first beam and the second beam based on the first amplitude feature and the second amplitude feature.

[0148] The amplitude difference information between the two beams can be determined according to the first amplitude feature and the second amplitude feature.

[0149] exist Figure 8 In the embodiment shown, by calculating and feeding back the amplitude difference between the two beams, the wireless transmitter can compensate for the difference in transmission power of each subcarrier between the two beams based on the amplitude difference information, so that the amplitude difference between the received third beam and the fourth beam is smaller, thereby improving the signal strength of the coherent signal.

[0150] Optionally, the signal difference information includes phase difference information between the first beam and the second beam; see Figure 9 , Figure 9 Another detailed flowchart of step S700 provided in an embodiment of the present application, the method may further include steps S740-S750.

[0151] Step S740: determining a path phase difference generated by the difference in transmission path length between the first beam and the second beam.

[0152] Since the first beam and the second beam travel different paths when they are transmitted, the phases of the two beams when they are received by the wireless receiver may also be different. Therefore, we can first determine the fixed path phase difference based on the difference in the transmission paths of the two beams, which is recorded as The path difference between the first beam and the second beam is Δl, and λ is the radio frequency carrier wavelength of WiFi.

[0153] Step S750 : determining a periodic phase difference between the first beam and the second beam generated based on the periodic vibration of the measured human body during breathing, and using the path phase difference and the periodic phase difference as phase difference information.

[0154] Among them, due to the periodic vibration generated by human breathing, there will be a periodic phase difference between the two beams, and the periodic phase difference in the i-th subcarrier is recorded as θ i sin 2πft,θ i is the variation of the phase difference of the ith subcarrier caused by breathing.

[0155] Optionally, the phase difference information may be the sum of the path phase difference and the periodic phase difference, that is, the phase difference information on the i-th subcarrier

[0156] Optionally, in order to improve the effect of signal compensation, the wireless transmitting end may report both the amplitude difference information and the phase difference information of the signal to the wireless transmitting end, so that the wireless transmitting end can compensate for both the amplitude difference and the phase difference.

[0157] exist Figure 9In the embodiment shown, by calculating and feeding back the phase difference between the two beams, the wireless transmitter can compensate for the phase difference between the two beams based on the phase difference information, so as to reduce the fixed phase difference between the received third beam and the fourth beam caused by different paths, retain the periodic phase difference caused by the periodic vibration of the human body, and improve the signal strength of the coherent signal.

[0158] Optionally, see Figure 10 , Figure 10 A detailed flow chart of step S800 is provided in an embodiment of the present application. The method may further include steps S810-S820.

[0159] Step S810: Determine a first subcarrier set according to the received third beam, and determine a second subcarrier set according to the received fourth beam.

[0160] Assuming that the first subcarrier set of the OFDM subcarriers of the beam signal of the third beam is S, and the second subcarrier set of the beam signal of the fourth beam is S′, then:

[0161]

[0162]

[0163] Among them, N is the number of OFDM subcarriers, A i , A′ i represents the amplitude of the i-th subcarrier, f i represents the frequency of the i-th subcarrier, Indicates the phase value of the i-th subcarrier.

[0164] Step S820: coherently process the first subcarrier set and the second subcarrier set to obtain a coherent signal.

[0165] The wireless receiving end uses a coherent monitoring method to perform coherent processing on the first subcarrier set and the second subcarrier set. The coherent processing can be performed by subtracting the subcarrier sets of the two signals to obtain a corresponding coherent signal Δ, which is calculated as follows:

[0166]

[0167] Since the third beam and the fourth beam can be beams after amplitude compensation, the amplitude C of the i-th subcarrier of the third beam and the fourth beam is i =C i ′, that is, α′ i A′ i =α i A i , so it can be simplified to:

[0168] exist Figure 10 In the embodiment shown, by coherently processing the two beams, the adverse effects of the disturbance signal on the electromagnetic wave caused by human breathing during time-varying fading in the wireless channel can be offset, thereby increasing the strength and quality of the disturbance signal and improving the measurement accuracy and stability when monitoring human breathing.

[0169] Optionally, see Figure 11 , Figure 11 A detailed flow chart of step S900 is provided in an embodiment of the present application. The method may further include steps S910-S920.

[0170] Step S910: Determine the signal strength of each subcarrier in the coherent signal.

[0171] The signal strength of each subcarrier in the coherent signal can be determined according to the simplified formula. The signal strength δ of the coherent signal Δ at the i-th subcarrier is i It can be expressed as {δ0,δ1,…δ i ,…δ N-1},in, Due to the phase difference information The third beam and the fourth beam can be beams after phase compensation, so the phase difference φ is compensated, then The phase difference caused by human breathing is a tiny amount, so the signal strength of Δ at the i-th subcarrier can be simplified to:

[0172]

[0173] Step S920: determining the respiratory rate of the human subject based on the signal strength.

[0174] Among them, due to the signal strength δ of the coherent signal i The signal intensity changes periodically, and its frequency is twice the human breathing frequency. i Perform FFT (Fast Fourier Transform) transformation and bandpass filtering to calculate the peak signal frequency within the human respiratory frequency range. Divide the peak signal frequency by 2 to obtain the respiratory frequency f measured on the i-th subcarrier. i , by extracting the breathing frequency of all subcarrier signal intensities of the coherent signal Δ, we can obtain the measurement value sequence {f0,f1,…f i ,…f N-1}, take the average of the above measured values ​​and calculate the final respiratory frequency of the periodic respiratory signal by averaging

[0175] For example, the abdominal fluctuation caused by human breathing changes the transmission path length of the second beam. The length change is usually less than 5mm, and for example, it can be set to 3mm. For example, when the horizontal height of the wireless transmitter and the wireless receiver are equal and the distance is 3.5m, the angle between the first beam and the second beam transmitted by the wireless receiver can be set to 30 degrees. The periodic phase difference between the two beams caused by human breathing is Then the signal strength of the coherent signal Δ at the i-th subcarrier is: The respiratory signal strength is obtained as Assuming that the power of the second beam received by the receiver is -70dBm, the breathing signal strength can reach -82dBm. This signal strength meets the requirements for extracting the human breathing frequency, and the human body frequency can be calculated based on this signal strength.

[0176] exist Figure 11 In the embodiment shown, the periodic disturbance of the wireless signal caused by human breathing is converted into a periodic change in the amplitude of the coherent signal, which effectively improves the signal-to-noise ratio during processing and the accuracy of the extracted respiratory frequency, thereby improving the monitoring effect of the human respiratory condition.

[0177] An embodiment of the present application also provides a wireless device, which includes a memory and a processor, wherein the memory stores program instructions, and when the processor reads and runs the program instructions, it executes the steps of any one of the respiratory monitoring methods provided in this embodiment.

[0178] An embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer program instructions. When the computer program instructions are read and executed by a processor, the steps of any one of the respiratory monitoring methods provided in this embodiment are executed.

[0179] In summary, the embodiments of the present application provide a respiratory monitoring method, system, wireless device, and computer-readable storage medium. Coherent monitoring is performed using two beams, one transmitted from a wireless transmitter to a wireless receiver and the other reflected from a human subject to the receiver. The system extracts the human respiratory rate based on the coherent signal, and uses signal compensation to reduce the signal difference between the two beams and increase the strength of the coherent signal, thereby improving the accuracy and stability of human respiratory monitoring and enhancing the effectiveness of monitoring human respiratory conditions.

[0180] In the several embodiments provided in this application, it should be understood that the disclosed devices can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the block diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices according to the multiple embodiments of the present application. In this regard, each box in the block diagram can represent a module, a program segment or a part of a code, and the module, program segment or a part of the code contains one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram, and the combination of the block diagrams, can be implemented with a dedicated hardware-based system that performs the specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0181] In addition, the functional modules in each embodiment of the present application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0182] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0183] The foregoing is merely an embodiment of the present application and is not intended to limit the scope of protection of the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included within the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined or explained in subsequent figures.

[0184] The above is only a specific implementation method of the present application, but the scope of protection of the present application is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed in this application, which should be covered by the scope of protection of the present application.

[0185] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, the elements defined by the phrase "comprising..." do not exclude the presence of other identical elements in the process, method, article, or device comprising the elements.

Claims

1. A respiratory monitoring method, characterized in that: Applied to a wireless transmitter, the method includes: Based on the multi-beam technology, the first beam is transmitted to the wireless receiving end, and the second beam is transmitted to the human body under test; receiving signal difference information fed back by the wireless receiving end based on the first beam and the second beam; wherein the first beam is a direct beam, the second beam is a reflected beam, and the signal difference information is a difference between the direct beam and the reflected beam; performing signal compensation on the first beam and the second beam based on the signal difference information to obtain a third beam and a fourth beam for performing respiratory monitoring; wherein the third beam includes the fifth beam and / or the seventh beam, and the fourth beam includes the sixth beam and / or the eighth beam; The signal difference information includes amplitude difference information between the first beam and the second beam; the signal compensation of the first beam and the second beam based on the signal difference information to obtain the third beam and the fourth beam includes: based on the amplitude difference information, obtaining a first amplitude characteristic of the first beam when received by the wireless receiving end, and a second amplitude characteristic of the second beam when received by the wireless receiving end; adjusting the first transmit power of the subcarriers in the first beam according to the first amplitude characteristic to obtain the fifth beam; adjusting the second transmit power of the subcarriers in the second beam according to the second amplitude characteristic to obtain the sixth beam, so that the adjusted amplitude difference information of the fifth beam and the sixth beam when received by the wireless receiving end satisfies the first difference range; And / or, wherein the signal difference information includes phase difference information between the first beam and the second beam; the signal compensation of the first beam and the second beam based on the signal difference information to obtain the third beam and the fourth beam includes: based on the phase difference information, obtaining the path phase difference and periodic phase difference when the first beam and the second beam are received by the wireless receiving end; adjusting the phase of the first beam according to the path phase difference and the periodic phase difference to obtain the seventh beam; adjusting the phase of the second beam according to the path phase difference and the periodic phase difference to obtain the eighth beam, so that the adjusted phase difference information when the seventh beam and the eighth beam are received by the wireless receiving end meets the second difference range.

2. The method according to claim 1, characterized in that The method of transmitting a first beam to a wireless receiving end and transmitting a second beam to a human body under test based on the multi-beam technology includes: Based on the multi-beam technology, create the first beam in a first direction according to the first position of the wireless receiving end, so as to directly transmit the first beam to the wireless receiving end; The second beam in the second direction is created according to the first position and the second position of the human body to be measured, so as to transmit the second beam to the human body to be measured, so that the second beam is reflected from the human body to be measured to the wireless receiving end.

3. The method according to claim 1 or 2, characterized in that The method further comprises: Transmitting the third beam directly to the wireless receiving end; The fourth beam is transmitted to the human body under test, so that the fourth beam is reflected from the human body under test to the wireless receiving end.

4. A respiratory monitoring method, characterized in that: Applied to a wireless receiving end, the method includes: Determine signal difference information between a first beam transmitted by a received wireless transmitting end and a second beam reflected by a measured human body; wherein the first beam is a direct beam, the second beam is a reflected beam, and the signal difference information is the difference between the direct beam and the reflected beam; Obtaining a coherent signal based on the received third beam and fourth beam, wherein the third beam and the fourth beam are beams transmitted by the wireless transmitting end after performing signal compensation on the first beam and the second beam based on the signal difference information; the third beam includes the fifth beam and / or the seventh beam, and the fourth beam includes the sixth beam and / or the eighth beam; Determining the respiratory rate of the measured human body based on the coherent signal; The signal difference information includes amplitude difference information between the first beam and the second beam; the determining of the signal difference information between the first beam transmitted by the received wireless transmitting end and the second beam reflected by the measured human body includes: receiving the first beam transmitted by the wireless transmitting end and the second beam reflected by the measured human body; determining a first amplitude characteristic of the subcarrier of the first beam and a second amplitude characteristic of the subcarrier of the second beam; determining the amplitude difference information between the first beam and the second beam based on the first amplitude characteristic and the second amplitude characteristic; the fifth beam and the sixth beam are determined by the wireless transmitting end: based on the amplitude difference information, obtaining the first amplitude characteristic when the first beam is received by the wireless receiving end and the second amplitude characteristic when the second beam is received by the wireless receiving end; adjusting the first transmit power of the subcarrier in the first beam according to the first amplitude characteristic to obtain the fifth beam; adjusting the second transmit power of the subcarrier in the second beam according to the second amplitude characteristic to obtain the sixth beam, so that the adjusted amplitude difference information of the fifth beam and the sixth beam when received by the wireless receiving end meets the first difference range; And / or, wherein the signal difference information includes phase difference information between the first beam and the second beam; the determining of the signal difference information between the first beam transmitted by the received wireless transmitting end and the second beam reflected by the human body under test includes: receiving the first beam transmitted by the wireless transmitting end and the second beam reflected by the human body under test; determining the path phase difference generated by the difference in transmission path length between the first beam and the second beam; determining the periodic phase difference generated by the periodic vibration of the human body under test during breathing between the first beam and the second beam, and using the path phase difference and the periodic phase difference as the phase Difference information; the seventh beam and the eighth beam are determined by the wireless transmitting end: based on the phase difference information, the path phase difference and the periodic phase difference when the first beam and the second beam are received by the wireless receiving end are obtained; the phase of the first beam is adjusted according to the path phase difference and the periodic phase difference to obtain the seventh beam; the phase of the second beam is adjusted according to the path phase difference and the periodic phase difference to obtain the eighth beam, so that the adjusted phase difference information when the seventh beam and the eighth beam are received by the wireless receiving end meets the second difference range.

5. The method according to claim 4, characterized in that Obtaining a coherent signal according to the received third beam and fourth beam includes: determining a first subcarrier set according to the received third beam, and determining a second subcarrier set according to the received fourth beam; The first subcarrier set and the second subcarrier set are coherently processed to obtain the coherent signal.

6. The method according to claim 4, characterized in that Determining the respiratory frequency of the measured human body based on the coherent signal includes: Determining the signal strength of each subcarrier in the coherent signal; The respiratory rate of the measured human body is determined based on the signal strength.

7. A respiratory monitoring system, characterized in that: The system includes a wireless transmitting end and a wireless receiving end; The wireless transmitting end is used to transmit a first beam to the wireless receiving end and transmit a second beam to the human body under test based on multi-beam technology; The wireless receiving end is used to determine signal difference information between a first beam transmitted by the wireless transmitting end and a second beam reflected by the human body under test; wherein the first beam is a direct beam, the second beam is a reflected beam, and the signal difference information is the difference between the direct beam and the reflected beam; The wireless transmitting end is further configured to receive signal difference information fed back by the wireless receiving end based on the first beam and the second beam; perform signal compensation on the first beam and the second beam based on the signal difference information to obtain a third beam and a fourth beam for respiratory monitoring; wherein the third beam includes the fifth beam and / or the seventh beam, and the fourth beam includes the sixth beam and / or the eighth beam; The wireless receiving end is further configured to obtain a coherent signal based on the third beam and the fourth beam received by the wireless transmitting end after signal compensation based on the signal difference information; and determine the respiratory rate of the measured human body based on the coherent signal; Wherein, the signal difference information includes amplitude difference information between the first beam and the second beam; the wireless receiving end is specifically used to: receive the first beam transmitted by the wireless transmitting end and the second beam reflected by the measured human body; determine the first amplitude characteristic of the subcarrier of the first beam, and the second amplitude characteristic of the subcarrier of the second beam; determine the amplitude difference information between the first beam and the second beam based on the first amplitude characteristic and the second amplitude characteristic; the wireless transmitting end is specifically used to: obtain the first amplitude characteristic when the first beam is received by the wireless receiving end, and the second amplitude characteristic when the second beam is received by the wireless receiving end based on the amplitude difference information; adjust the first transmission power of the subcarrier in the first beam according to the first amplitude characteristic to obtain the fifth beam; adjust the second transmission power of the subcarrier in the second beam according to the second amplitude characteristic to obtain the sixth beam, so that the adjusted amplitude difference information between the fifth beam and the sixth beam when received by the wireless receiving end meets the first difference range; And / or, wherein the signal difference information includes phase difference information between the first beam and the second beam; the wireless receiving end is specifically used to: receive the first beam transmitted by the wireless transmitting end and the second beam reflected by the measured human body; determine the path phase difference generated by the difference in transmission path length between the first beam and the second beam; determine the periodic phase difference generated by the first beam and the second beam based on the periodic vibration of the measured human body during breathing, and use the path phase difference and the periodic phase difference as the phase difference information; the wireless transmitting end is specifically used to: based on the phase difference information, obtain the path phase difference and the periodic phase difference when the first beam and the second beam are received by the wireless receiving end; adjust the phase of the first beam according to the path phase difference and the periodic phase difference to obtain the seventh beam; adjust the phase of the second beam according to the path phase difference and the periodic phase difference to obtain the eighth beam, so that the adjusted phase difference information when the seventh beam and the eighth beam are received by the wireless receiving end meets the second difference range.

8. A wireless device, characterized in that: The wireless device includes a memory and a processor, wherein the memory stores program instructions, and when the processor runs the program instructions, the steps of the method according to any one of claims 1 to 6 are executed.

9. A computer-readable storage medium, characterized in that: The readable storage medium stores computer program instructions, and when the computer program instructions are executed by a processor, the steps of the method according to any one of claims 1 to 6 are executed.

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