Heart sound detection method

Abstract

The invention discloses a heart sound detection method, and relates to the technical field of intelligent wearable device.The heart sound detection method comprises the following steps that a chain body is worn outside a wearer through a wearing hole; the pendant is rotated so that the attaching face can be attached to the body surface of the wearer; a heart sound signal of a wearer is detected through a heart sound sensor, and the detected heart sound signal is sent to a main control chip; and the main control chip analyzes the heart sound signals to obtain heart sound data. According to the necklace, the heart sound sensor is arranged in the pendant of the necklace, so that the position aligned to the heart sound sensor does not need to be manually adjusted during heart sound detection, the accuracy of heart sound signal detection is improved, meanwhile, the heart sound sensor is perpendicular to the body surface of a wearer, all detected heart sound signals can be fully utilized, and the detection efficiency is improved. Therefore, the detection effect of the heart sound sensor and the accuracy of the detection result are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent wearable devices, and in particular to a heart sound detection method. Background Art

[0002] With the rapid development of information technology, more and more smart wearable devices are being applied to various fields of life. At present, smart wearable devices have become a hot spot in the market, and their types are increasing day by day, such as smart watches, smart glasses, smart bracelets and other wearable devices. As the material living standards continue to improve, people are beginning to pay more and more attention to their health status, especially through a variety of instruments and equipment to collect and analyze their own health data, resulting in the large-scale promotion of measuring instruments and equipment. Smart wearable devices with health monitoring functions such as smart bracelets and smart watches are also favored by users because of their portability and diverse appearance.

[0003] Heart sounds refer to the sounds made by heart beating. By monitoring heart sound data, the health status of the heart can be obtained, and a variety of heart information can be obtained from the heart sound data. Smart bracelets and smart watches in the prior art usually detect heart sound data by placing the arm on the chest so that the heart sound sensor corresponds to the chest setting. However, in actual operation, different users have different understandings of the placement of smart bracelets and smart watches, and usually cannot align them, let alone make the heart sound sensor perpendicular to the chest. In addition, the thickness of chest fat is different for different people. It is understandable that fat has a weakening effect on sound. Therefore, people with thicker chest fat, especially women, have poor heart sound detection when using smart bracelets or smart watches, and the detection results are inaccurate. Summary of the invention

[0004] The main purpose of the present invention is to propose a heart sound detection method, which aims to solve the problems in the prior art that when performing heart sound detection through a smart bracelet or smart watch, the heart sound sensor cannot be aligned or vertical, and fat affects the heart sound sensor, resulting in poor heart sound detection effect and inaccurate detection results.

[0005] To achieve the above-mentioned purpose, the present invention proposes a heart sound detection method, which is applied to a smart necklace. The smart necklace includes a chain body and a pendant. The chain body is formed with a wearing hole. The pendant includes a pendant body, a heart sound sensor and a main control chip. The pendant body is connected to the chain body. The opposite sides of the pendant body respectively form a decorative surface and a fitting surface. A receiving cavity is formed in the pendant body. The heart sound sensor and the main control chip are both accommodated in the receiving cavity. The detection end of the heart sound sensor faces the fitting surface. The heart sound detection method includes the following steps:

[0006] Wearing the chain body outside the wearer's body through the wearing hole;

[0007] Rotating the pendant so that the fitting surface fits the body surface of the wearer;

[0008] Detecting the wearer's heart sound signal through the heart sound sensor, and sending the detected heart sound signal to the main control chip;

[0009] The main control chip analyzes the heart sound signal to obtain heart sound data.

[0010] In one embodiment, a filter is further provided in the accommodating cavity;

[0011] The step of sending the detected heart sound signal to the main control chip includes:

[0012] The heart sound sensor sends the detected heart sound signal to the filter;

[0013] The filter removes the heart sound signal outside a preset frequency range to filter the heart sound signal;

[0014] The filter sends the filtered heart sound signal to the main control chip.

[0015] In one embodiment, a plurality of the heart sound sensors are arranged at intervals in the accommodating cavity;

[0016] The step of detecting the heart sound signal of the wearer by the heart sound sensor comprises:

[0017] The plurality of heart sound sensors respectively detect the heart sound signals of the wearer;

[0018] The step of sending the detected heart sound signal to the main control chip includes:

[0019] The plurality of heart sound sensors send the detected plurality of heart sound signals to the filter respectively;

[0020] filtering the plurality of heart sound signals respectively through the filter;

[0021] The filter sends the filtered plurality of heart sound signals to the main control chip;

[0022] The step of the main control chip analyzing the heart sound signal to obtain heart sound data includes:

[0023] The main control chip analyzes the plurality of heart sound signals to obtain the heart sound data.

[0024] In one embodiment, a distance sensor is further provided in the accommodating cavity at a position corresponding to each of the heart sound sensors, and a detection end of each of the distance sensors faces the fitting surface;

[0025] After the step of the plurality of heart sound sensors detecting the heart sound signals of the wearer respectively, the method further includes:

[0026] The plurality of distance sensors respectively detect thickness data of the wearer's subcutaneous fat at the corresponding heart sound sensors, and send the detected plurality of thickness data to the main control chip respectively;

[0027] The step of the main control chip analyzing the plurality of heart sound signals to obtain the heart sound data comprises:

[0028] The main control chip analyzes the plurality of thickness data and the plurality of heart sound signals to obtain the heart sound data.

[0029] In one embodiment, the main control chip analyzes the plurality of thickness data and the plurality of heart sound signals, and the step of obtaining the heart sound data includes:

[0030] According to the ratio of the thickness data detected by the plurality of distance sensors, a weight value is assigned to the heart sound signal detected by the heart sound sensor corresponding to the distance sensor, wherein the thickness data is inversely proportional to the weight value;

[0031] The heart sound data is obtained by calculating using the following formula:

[0032] S=(a1R1+a2R2+…+a n R n ) / n,

[0033] Wherein, S is the heart sound data, R n is the nth heart sound signal, a n is the weight value corresponding to the nth heart sound signal, and n is the total number of heart sound signals.

[0034] In one embodiment, the decorative surface and the fitting surface can be selected to fit with the body surface of the wearer when the chain body is worn outside the wearer through the wearing hole, and the fitting surface or the decorative surface that fits with the body surface of the wearer is defined as a working surface, and a driving member electrically connected to the main control chip is further provided in the accommodating cavity;

[0035] Before the step of detecting the heart sound signal of the wearer through the detection end of the heart sound sensor, the step further includes:

[0036] The main control chip determines that the working surface is the fitting surface or the decorative surface, and controls the driving member to drive the heart sound sensor to rotate so that the detection end of the heart sound sensor faces the working surface.

[0037] In one embodiment, an angle sensor is provided in the accommodating cavity;

[0038] The step of the main control chip determining that the working surface is the bonding surface or the decorative surface comprises:

[0039] The angle sensor detects the rotation angle data of the pendant, and sends the detected rotation angle data to the main control chip;

[0040] The main control chip determines that the surface in contact with the wearer's body surface is the contact surface or the decorative surface according to the rotation angle data, and determines that the working surface is the contact surface or the decorative surface.

[0041] In one embodiment, a first temperature sensor and a second temperature sensor are disposed in the accommodating cavity, the first temperature sensor is disposed close to the bonding surface, and the second temperature sensor is disposed close to the decorative surface;

[0042] The step of the main control chip determining that the working surface is the bonding surface or the decorative surface comprises:

[0043] The first temperature sensor detects first temperature data of the bonding surface, and sends the detected first temperature data to the main control chip; the second temperature sensor detects second temperature data of the decorative surface, and sends the detected second temperature data to the main control chip;

[0044] The main control chip analyzes the first temperature data and the second temperature data, determines that the surface in contact with the wearer's body surface is the fitting surface or the decorative surface according to the analysis result, and determines that the working surface is the fitting surface or the decorative surface.

[0045] In one embodiment, the main control chip analyzes the first temperature data and the second temperature data, determines that the surface in contact with the wearer's body surface is the contact surface or the decorative surface according to the analysis result, and determines that the working surface is the contact surface or the decorative surface. The step includes:

[0046] The main control chip acquires the maximum value and the minimum value of the first temperature data and the second temperature data;

[0047] If the maximum value is not lower than the preset high temperature threshold, the surface in contact with the wearer's body surface is determined to be the contact surface or the decorative surface corresponding to the minimum value, and the working surface is determined to be the contact surface or the decorative surface;

[0048] If the maximum value is lower than the preset high temperature threshold, the surface in contact with the wearer's body surface is determined to be the contact surface or the decorative surface corresponding to the maximum value, and the working surface is determined to be the contact surface or the decorative surface.

[0049] In one embodiment, a communication module is further disposed in the accommodating cavity, and the communication module is electrically connected to the main control chip;

[0050] After the step of the main control chip analyzing the heart sound signal to obtain the heart sound data, the method further includes:

[0051] The main control chip sends the heart sound data to an external device through the communication module.

[0052] In the technical solution of the present invention, the chain body is first worn outside the wearer's body through the wearing hole, and the pendant is automatically hung at the position corresponding to the middle of the chest under the action of gravity, so that the heart sound sensor faces the middle of the chest with less fat, rather than the chest at the heart with glands and fat, thereby reducing the influence of fat on the heart sound signal. At the same time, due to the movement of the pendant under the action of gravity, the position of the pendant does not need to be manually aligned by the wearer, and the position of the pendant is almost the same for different wearers, thereby improving the accuracy of heart sound signal detection; then the pendant is rotated to make the fitting surface fit with the body surface. Since the detection end of the heart sound sensor faces the fitting surface, when the fitting surface fits with the body surface, the heart sound sensor is perpendicular to the body surface of the wearer, so that the heart sound sensor will not have a component due to inclination when detecting, and all detected heart sound signals can be fully utilized, thereby improving the detection effect of the heart sound sensor; the heart sound sensor sends the heart sound signal to the main control chip, and the main control chip analyzes the heart sound signal to obtain heart sound data, thereby performing health monitoring.

[0053] The present invention arranges the heart sound sensor in the pendant of the necklace, so that there is no need to manually adjust the position of the heart sound sensor during heart sound detection. The heart sound detection area can be ensured to be roughly the same for different users, thereby improving the accuracy of heart sound signal detection. At the same time, after wearing, the fitting surface of the pendant is rotated to fit the skin, so that the detection end of the heart sound sensor is perpendicular to the wearer's body surface, and all detected heart sound signals can be fully utilized, thereby improving the detection effect of the heart sound sensor and the accuracy of the detection result; and compared with smart bracelets and smart watches, smart necklaces can be close to the wearer's body surface at all times to detect heart sound data in real time, thereby improving the comprehensiveness and timeliness of detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0055] Figure 1A flowchart of a heart sound detection method provided by an embodiment of the present invention;

[0056] Figure 2 A partial detailed flow chart of step S300 of the heart sound detection method provided in one embodiment of the present invention;

[0057] Figure 3 A detailed flowchart of a heart sound detection method provided by another embodiment of the present invention;

[0058] Figure 4 A detailed flowchart of step S290 of the heart sound detection method provided in one embodiment of the present invention;

[0059] Figure 5 A detailed flowchart of step S290 of a heart sound detection method provided by another embodiment of the present invention;

[0060] Figure 6 A schematic diagram of the structure of a smart necklace provided by an embodiment of the present invention;

[0061] Figure 7 A schematic diagram of the disassembled structure of a smart necklace pendant provided in one embodiment of the present invention.

[0062] Description of Figure Numbers:

[0063] 100. Smart necklace; 1. Chain body; 2. Pendant; 20. Accommodating cavity; 21. Pendant body; 211. Decorative surface; 212. Fitting surface; 22. Heart sound sensor; 23. Main control chip; 24. Filter; 25. Distance sensor; 26. Driving part.

[0064] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0065] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0066] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0067] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0068] Smart bracelets and smart watches in the prior art usually detect heart sound data by placing the arm on the chest so that the heart sound sensor is set corresponding to the chest. However, in actual operation, different users have different understandings of the placement of smart bracelets and smart watches, and they are usually unable to align them, let alone make the heart sound sensor perpendicular to the chest. In addition, the thickness of chest fat is different for different people. It is understandable that fat has a weakening effect on sound. Therefore, people with thicker chest fat, especially women, have poor heart sound detection results when using smart bracelets or smart watches, and the detection results are inaccurate.

[0069] Please combine Figure 1 , Figure 6 and Figure 7 In order to solve the above problems, the present invention proposes a heart sound detection method, which is applied to a smart necklace 100. The smart necklace 100 includes a chain body 1 and a pendant 2. The chain body 1 is formed with a wearing hole. The pendant 2 includes a pendant 21, a heart sound sensor 22 and a main control chip 23. The pendant 21 is connected to the chain body 1. The opposite sides of the pendant 21 respectively form a decorative surface 211 and a fitting surface 212. A receiving cavity 20 is formed in the pendant 21. The heart sound sensor 22 and the main control chip 23 are both accommodated in the receiving cavity 20. The detection end of the heart sound sensor 22 faces the fitting surface 212. The heart sound detection method includes the following steps:

[0070] S100: Wearing the chain body outside the wearer's body through the wearing hole;

[0071] The pendant 21 is hung on the wearer's neck through the chain body 1, so that the pendant 21 moves to the outside of the wearer's body near the middle of the chest under the action of gravity;

[0072] S200: rotating the pendant so that the fitting surface fits the body surface of the wearer;

[0073] The fitting surface 212 of the pendant 2 is attached to the body surface, so that the detection end of the heart sound sensor 22 is arranged corresponding to the body surface;

[0074] S300: detecting the heart sound signal of the wearer through the heart sound sensor, and sending the detected heart sound signal to the main control chip;

[0075] S400: The main control chip analyzes the heart sound signal to obtain heart sound data.

[0076] In the technical solution of the present invention, the chain body 1 is first worn outside the wearer through the wearing hole, and the pendant 21 is automatically hung at the position corresponding to the middle of the chest under the action of gravity, so that the heart sound sensor 22 faces the middle of the chest with less fat, rather than the chest at the heart with glands and fat, thereby reducing the influence of fat on the heart sound signal. At the same time, due to the movement of the pendant 2 under the action of gravity, the position of the pendant 2 does not need to be manually aligned by the wearer, and the position of the pendant 2 for different wearers is almost the same, thereby improving the accuracy of heart sound signal detection; then turn The dynamic pendant 2 makes the fitting surface 212 fit with the body surface. Since the detection end of the heart sound sensor 22 faces the fitting surface 212, when the fitting surface 212 fits with the body surface, the heart sound sensor 22 is perpendicular to the body surface of the wearer, so that the heart sound sensor 22 will not have any component due to inclination when performing detection, and all detected heart sound signals can be fully utilized, thereby improving the detection effect of the heart sound sensor 22; the heart sound sensor 22 sends the heart sound signal to the main control chip 23, and the main control chip 23 analyzes the heart sound signal to obtain heart sound data, so as to perform health monitoring.

[0077] The present invention sets the heart sound sensor 22 in the pendant 2 of the necklace, so that there is no need to manually adjust the position of the heart sound sensor 22 during heart sound detection. The heart sound detection area can be ensured to be roughly the same for different users, thereby improving the accuracy of heart sound signal detection. At the same time, after wearing, the fitting surface 212 of the pendant 2 is rotated to fit the skin, so that the detection end of the heart sound sensor 22 is perpendicular to the wearer's body surface, and all detected heart sound signals can be fully utilized, thereby improving the detection effect of the heart sound sensor 22 and the accuracy of the detection results; and compared with smart bracelets and smart watches, the smart necklace 100 can always be close to the wearer's body surface and detect heart sound data in real time, improving the comprehensiveness and timeliness of the detection.

[0078] Please combine Figure 2 and Figure 6 In one embodiment, a filter 24 is further disposed in the accommodating cavity 20;

[0079] The step of sending the detected heart sound signal to the main control chip includes:

[0080] S310a: the heart sound sensor sends the detected heart sound signal to the filter;

[0081] S320a: The filter removes the heart sound signal outside a preset frequency range to filter the heart sound signal;

[0082] S330a: The filter sends the filtered heart sound signal to the main control chip.

[0083] When the number of heart sound sensors 22 is one, the heart sound signal at the chest is detected by the heart sound sensor 22, and the heart sound signal is sent to the filter 24. The filter 24 filters out the noise and interference in the heart sound signal, leaving only the heart sound signal within the preset frequency range, thereby realizing the filtering operation. The filter 24 sends the filtered heart sound signal to the main control chip 23 for subsequent operations.

[0084] It can be understood that the frequency range of heart sounds is usually 20 to 150 Hz. Therefore, in order to prevent the heart sound signal from being interfered with by environmental noise, body movement and other factors, filter 2424 is set to filter out signals outside 20 to 150 Hz, remove unnecessary high-frequency or low-frequency noise, retain the key frequency bands of the heart sound signal, improve the clarity of the heart sound signal, and thus improve the detection accuracy of the heart sound signal.

[0085] Please combine Figure 3 and Figure 6 In one embodiment, a plurality of heart sound sensors are arranged at intervals in the accommodating cavity 20;

[0086] The step of detecting the heart sound signal of the wearer by the heart sound sensor comprises:

[0087] S301: The plurality of heart sound sensors detect the heart sound signals of the wearer respectively;

[0088] A plurality of heart sound sensors 22 are arranged at intervals in the accommodating chamber 20, so that the plurality of heart sound sensors 22 can respectively collect heart sound signals at different positions;

[0089] The step of sending the detected heart sound signal to the main control chip includes:

[0090] S310b: multiple heart sound sensors send the detected multiple heart sound signals to the filter respectively;

[0091] The multiple heart sound sensors 22 send the multiple heart sound signals detected by the grid to the filter 24. It should be noted that the filter 24 can be one, and one filter 24 corresponds to multiple heart sound sensors 22, or the filter 24 can be multiple, and each heart sound sensor 22 corresponds to one filter 24;

[0092] S320b: filtering the plurality of heart sound signals respectively through the filter;

[0093] S330b: the filter sends the filtered plurality of heart sound signals to the main control chip;

[0094] Step S400 includes:

[0095] S410: The main control chip analyzes the plurality of heart sound signals to obtain the heart sound data.

[0096] The main control chip 23 comprehensively analyzes and calculates the heart sound data according to the multiple heart sound signals and the positions of the heart sound sensors corresponding to the different heart sound signals.

[0097] During daily activities, the pendant 2 will inevitably shift and cannot be guaranteed to always be in the middle of the chest. Therefore, multiple heart sound sensors can detect heart sound signals in different parts of the body, covering a larger area, ensuring that clearer and more accurate heart sound signals are captured, and the accuracy of the heart sound signals can still be guaranteed when shifts occur. At the same time, multiple heart sound sensors can detect signals at the same time and fuse or average them through algorithms, thereby reducing signal loss or distortion caused by poor contact or position deviation of a single heart sound sensor, further improving the accuracy of the heart sound signal, and thereby improving the accuracy of the heart sound data.

[0098] In one embodiment, a distance sensor is further provided in the accommodating cavity at a position corresponding to each heart sound sensor, and the detection end of each distance sensor faces the fitting surface;

[0099] After step S301, the method further includes:

[0100] S302: The plurality of distance sensors respectively detect thickness data of the wearer's subcutaneous fat at the corresponding heart sound sensors, and send the detected plurality of thickness data to the main control chip respectively;

[0101] The distance sensor 25 can be an ultrasonic sensor or an electrical impedance measurement sensor in the prior art. The above two functional sensors have the advantages of being small and low in power consumption, and are suitable for applications in small structures such as the smart necklace 100.

[0102] Step S410 includes:

[0103] S4101: The main control chip analyzes the plurality of thickness data and the plurality of heart sound signals to obtain the heart sound data.

[0104] The thickness of subcutaneous fat will affect the propagation of heart sound signals. By detecting the fat thickness at each location, the system can correct the heart sound signals and compensate for the attenuation and distortion of the signal caused by the fat layer, thereby improving signal accuracy.

[0105] Specifically, step S4101 includes:

[0106] S4102: assigning a weight value to the heart sound signal detected by the heart sound sensor corresponding to the distance sensor according to a ratio of the thickness data detected by the plurality of distance sensors, wherein the thickness data is inversely proportional to the weight value;

[0107] The heart sound data is obtained by calculating using the following formula:

[0108] S=(a1R1+a2R2+…+a n R n ) / n,

[0109] Wherein, S is the heart sound data, R n is the nth heart sound signal, a n is the weight value corresponding to the nth heart sound signal, and n is the total number of heart sound signals.

[0110] The thickness of subcutaneous fat at different locations on the user's chest is different. Areas with thicker fat layers may cause greater attenuation of the transmission of heart sound signals. By making the thickness inversely proportional to the weight, the contribution of each heart sound sensor 22 can be dynamically adjusted to optimize the final heart sound data; at the same time, due to the absorption of sound by fat, areas with thicker subcutaneous fat may cause more severe signal attenuation. By giving areas with thicker subcutaneous fat lower weights, the impact of signals in these areas on the overall heart sound data can be reduced, thereby improving the accuracy of the data.

[0111] In one embodiment, the decorative surface 211 and the fitting surface 212 can be selected to fit with the body surface of the wearer when the chain body 1 is worn outside the wearer through the wearing hole. The fitting surface 212 or the decorative surface 211 that fits with the body surface of the wearer is defined as a working surface. A driving member 26 electrically connected to the main control chip 23 is also provided in the accommodating cavity 20.

[0112] Before step S300, the following steps are also included:

[0113] S290: The main control chip determines that the working surface is the fitting surface or the decorative surface, and controls the driving member to drive the heart sound sensor to rotate so that the detection end of the heart sound sensor faces the working surface.

[0114] It is understandable that during daily activities, the pendant 22 may rotate, causing the decorative surface 211 to fit against the wearer's body surface. At this time, since the detection end of the heart sound sensor 22 is facing the fitting surface 212, after rotation, the detection end is away from the body surface, resulting in the detection end being unable to detect the heart sound signal, or causing the heart sound signal detection effect to be weakened. Therefore, the main control chip 23 determines whether the working surface is the fitting surface 212 or the decorative surface 211, and then the driving component 26 drives the heart sound sensor 22 to rotate relative to the pendant 22, so that the detection end of the heart sound sensor 22 faces the working surface, so that even if the pendant 22 is flipped during the activity, the detection end of the heart sound sensor 22 can always be aligned with the wearer's body surface and perpendicular to the wearer's body surface, thereby ensuring the stability and accuracy of heart sound detection.

[0115] See also Figure 4 In a specific embodiment, an angle sensor is provided in the accommodating cavity 20;

[0116] The step of the main control chip determining that the working surface is the bonding surface or the decorative surface comprises:

[0117] S291a: The angle sensor detects the rotation angle data of the pendant, and sends the detected rotation angle data to the main control chip;

[0118] S292a: The main control chip determines whether the surface in contact with the wearer's body surface is the contact surface or the decorative surface based on the rotation angle data, and determines whether the working surface is the contact surface or the decorative surface.

[0119] It can be understood that since the fitting surface 212 is fitted to the user's body surface in step S200, and due to the action of the chain body 1 and gravity, the pendant 2 usually only rotates about the vertical axis, so the specific number of rotations can be determined according to its rotation angle, so as to determine whether the decorative surface 211 or the fitting surface 212 is rotated to fit the wearer's body surface. For example, if a rotation of 180 degrees is detected after step S200, it can be considered that the pendant 2 is turned over, and the decorative surface 211 is determined to be the working surface; the flipping angle of the pendant 2 can be detected in real time through the angle sensor angle to ensure that the device can accurately identify the current working surface, so that the main control chip 23 can drive the heart sound sensor 22 to rotate through the difficult driving component 26, so that it always keeps the detection end facing the skin.

[0120] See also Figure 5 In another specific embodiment, a first temperature sensor and a second temperature sensor are disposed in the accommodating cavity 20, the first temperature sensor is disposed close to the fitting surface 212, and the second temperature sensor is disposed close to the decorative surface 211;

[0121] The step of the main control chip determining that the working surface is the bonding surface or the decorative surface comprises:

[0122] S291b: the first temperature sensor detects first temperature data of the bonding surface, and sends the detected first temperature data to the main control chip; the second temperature sensor detects second temperature data of the decorative surface, and sends the detected second temperature data to the main control chip;

[0123] S292b: The main control chip analyzes the first temperature data and the second temperature data, and determines that the surface in contact with the wearer's body surface is the fitting surface or the decorative surface according to the analysis result, and determines that the working surface is the fitting surface or the decorative surface.

[0124] It is understandable that under normal circumstances, the human body surface temperature is higher than the room temperature. Therefore, by comparing the readings of the temperature sensors on both sides of the pendant 22, the system can quickly determine which side is in contact with the skin, so that the main control chip 23 can drive the heart sound sensor 22 to rotate through the driving member 26, so that it always keeps the detection end facing the skin, and directly determines the working surface through the temperature difference, reducing the complex angle detection structure design, which not only simplifies the equipment structure, but also reduces maintenance costs.

[0125] Further, step S292b includes:

[0126] S2921b: The main control chip obtains the maximum value and the minimum value of the first temperature data and the second temperature data;

[0127] S2922b: If the maximum value is not lower than the preset high temperature threshold, determining that the surface in contact with the wearer's body surface is the contact surface or the decorative surface corresponding to the minimum value, and determining that the working surface is the contact surface or the decorative surface;

[0128] S2923b: If the maximum value is lower than the preset high temperature threshold, the surface in contact with the wearer's body surface is determined to be the contact surface or the decorative surface corresponding to the maximum value, and the working surface is determined to be the contact surface or the decorative surface.

[0129] It should be noted that, under normal circumstances, the human body surface temperature is higher than the room temperature, but there are also cases where the room temperature is higher than the human body surface temperature. When the room temperature is only slightly higher than the human body surface temperature, such as when the body surface temperature is 37 degrees and the room temperature is 37.5 degrees, the side of the pendant 2 that is in contact with the body surface may reach a local temperature of more than 38 degrees due to reasons such as airtightness and heat accumulation. At this time, although the room temperature is higher than the body temperature, the temperature of the side of the pendant 2 that is in contact with the body surface is still higher than the room temperature. If it is determined that the minimum value corresponds to the contact surface 212, it will cause the detection end of the heart sound sensor 22 to face the side that is not in contact with the body surface. Therefore, a preset high temperature threshold is set to take into account the local high temperature caused by heat accumulation and other reasons. For example, the preset high temperature is set to 40 degrees. When the body surface is 37 degrees, the heat accumulation will not exceed 40 degrees in any case. At this time, the low temperature side corresponding to the minimum value is determined as the working surface, and there will be no misjudgment. When the maximum value is lower than the preset high temperature threshold, that is, under normal circumstances, it is considered that the high temperature side corresponding to the maximum value is the working surface that is in contact with the body surface.

[0130] In one embodiment, a communication module is further disposed in the accommodating cavity 20, and the communication module is electrically connected to the main control chip 23;

[0131] After step S400, the method further includes:

[0132] S500: The main control chip sends the heart sound data to an external device through the communication module.

[0133] The heart sound data is sent to an external device through the communication module, which can be a smartphone or smart terminal, so that the heart sound data can be clearly displayed and used for subsequent research. It can also be a smart watch, which can comprehensively judge the heart sound data with health data such as heart rate and blood pressure, thereby improving the accuracy of health monitoring.

[0134] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A heart sound detection method, characterized in that: The heart sound detection method is applied to a smart necklace, which includes a chain body and a pendant, wherein the chain body is formed with a wearing hole, and the pendant includes a pendant body, a heart sound sensor and a main control chip, wherein the pendant body is connected to the chain body, and opposite sides of the pendant body respectively form a decorative surface and a fitting surface, wherein a receiving cavity is formed in the pendant body, wherein the heart sound sensor and the main control chip are both accommodated in the receiving cavity, and the detection end of the heart sound sensor faces the fitting surface, and the heart sound detection method includes the following steps: Wearing the chain body outside the wearer's body through the wearing hole; Rotating the pendant so that the fitting surface fits the body surface of the wearer; Detecting the wearer's heart sound signal through the heart sound sensor, and sending the detected heart sound signal to the main control chip; The main control chip analyzes the heart sound signal to obtain heart sound data.

2. The heart sound detection method according to claim 1, characterized in that: A filter is also provided in the accommodating cavity; The step of sending the detected heart sound signal to the main control chip includes: The heart sound sensor sends the detected heart sound signal to the filter; The filter removes the heart sound signal outside a preset frequency range to filter the heart sound signal; The filter sends the filtered heart sound signal to the main control chip.

3. The heart sound detection method according to claim 2, characterized in that: A plurality of the heart sound sensors are arranged at intervals in the accommodating cavity; The step of detecting the heart sound signal of the wearer by the heart sound sensor comprises: The plurality of heart sound sensors respectively detect the heart sound signals of the wearer; The step of sending the detected heart sound signal to the main control chip includes: The plurality of heart sound sensors send the detected plurality of heart sound signals to the filter respectively; filtering the plurality of heart sound signals respectively through the filter; The filter sends the filtered plurality of heart sound signals to the main control chip; The step of the main control chip analyzing the heart sound signal to obtain heart sound data includes: The main control chip analyzes the plurality of heart sound signals to obtain the heart sound data.

4. The heart sound detection method according to claim 3, characterized in that: A distance sensor is also arranged in the accommodating cavity at a position corresponding to each of the heart sound sensors, and a detection end of each of the distance sensors faces the fitting surface; After the step of the plurality of heart sound sensors detecting the heart sound signals of the wearer respectively, the method further includes: The plurality of distance sensors respectively detect thickness data of the wearer's subcutaneous fat at the corresponding heart sound sensors, and send the detected plurality of thickness data to the main control chip respectively; The step of the main control chip analyzing the plurality of heart sound signals to obtain the heart sound data comprises: The main control chip analyzes the plurality of thickness data and the plurality of heart sound signals to obtain the heart sound data.

5. The heart sound detection method according to claim 4, characterized in that: The main control chip analyzes the plurality of thickness data and the plurality of heart sound signals to obtain the heart sound data, comprising: According to the ratio of the thickness data detected by the plurality of distance sensors, a weight value is assigned to the heart sound signal detected by the heart sound sensor corresponding to the distance sensor, wherein the thickness data is inversely proportional to the weight value; The heart sound data is obtained by calculating using the following formula: S=(a1R1+a2R2+…+a n R n ) / n, Wherein, S is the heart sound data, R n is the nth heart sound signal, a n is the weight value corresponding to the nth heart sound signal, and n is the total number of heart sound signals.

6. The heart sound detection method according to claim 1, characterized in that: The decorative surface and the fitting surface can be selected to fit with the body surface of the wearer when the chain body is worn outside the wearer through the wearing hole, and the fitting surface or the decorative surface that fits with the body surface of the wearer is defined as a working surface, and a driving component electrically connected to the main control chip is also provided in the accommodating cavity; Before the step of detecting the heart sound signal of the wearer through the detection end of the heart sound sensor, the step further includes: The main control chip determines that the working surface is the fitting surface or the decorative surface, and controls the driving member to drive the heart sound sensor to rotate so that the detection end of the heart sound sensor faces the working surface.

7. The heart sound detection method according to claim 6, characterized in that: An angle sensor is arranged in the accommodating cavity; The step of the main control chip determining that the working surface is the bonding surface or the decorative surface comprises: The angle sensor detects the rotation angle data of the pendant, and sends the detected rotation angle data to the main control chip; The main control chip determines that the surface in contact with the wearer's body surface is the contact surface or the decorative surface according to the rotation angle data, and determines that the working surface is the contact surface or the decorative surface.

8. The heart sound detection method according to claim 6, characterized in that: A first temperature sensor and a second temperature sensor are arranged in the accommodating cavity, the first temperature sensor is arranged close to the bonding surface, and the second temperature sensor is arranged close to the decorative surface; The step of the main control chip determining that the working surface is the bonding surface or the decorative surface comprises: The first temperature sensor detects first temperature data of the bonding surface, and sends the detected first temperature data to the main control chip; the second temperature sensor detects second temperature data of the decorative surface, and sends the detected second temperature data to the main control chip; The main control chip analyzes the first temperature data and the second temperature data, determines that the surface in contact with the wearer's body surface is the fitting surface or the decorative surface according to the analysis result, and determines that the working surface is the fitting surface or the decorative surface.

9. The heart sound detection method according to claim 8, characterized in that: The main control chip analyzes the first temperature data and the second temperature data, determines that the surface in contact with the wearer's body surface is the contact surface or the decorative surface according to the analysis result, and determines that the working surface is the contact surface or the decorative surface. The steps include: The main control chip acquires the maximum value and the minimum value of the first temperature data and the second temperature data; If the maximum value is not lower than the preset high temperature threshold, the surface in contact with the wearer's body surface is determined to be the contact surface or the decorative surface corresponding to the minimum value, and the working surface is determined to be the contact surface or the decorative surface; If the maximum value is lower than the preset high temperature threshold, the surface in contact with the wearer's body surface is determined to be the contact surface or the decorative surface corresponding to the maximum value, and the working surface is determined to be the contact surface or the decorative surface.

10. The heart sound detection method according to any one of claims 1 to 9, characterized in that: A communication module is also provided in the accommodating cavity, and the communication module is electrically connected to the main control chip; After the step of the main control chip analyzing the heart sound signal to obtain the heart sound data, the method further includes: The main control chip sends the heart sound data to an external device through the communication module.

Images