Earphone and earphone assembly

Abstract

The utility model provides an earphone and an earphone assembly. The earphone comprises a housing, a first coordinate position and a second coordinate position of the housing are respectively provided with a first sensor and a second sensor, and the first coordinate position and the second coordinate position are determined based on the type of the earphone and an ear model. The first sensor and the second sensor are used for being in contact with ears of a user to obtain physiological signals; and the processing unit is used for processing the physiological signal to at least obtain one of heart rate information and blood oxygen information of the user. The signal acquisition quality can be improved, and the wearing difference of the human body can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the earphone technical field, and particularly to an earphone and an earphone assembly. BACKGROUND

[0002] Wireless earphones, especially true wireless stereo (TWS) earphones, are favored by many consumers due to their small size, portability, and ease of use, and have been widely used in life and work. Implementing health monitoring (such as heart rate detection) on earphones can give earphones more functions and bring more convenience to users. However, the ear is curved, and the shape and size of users' ears differ greatly, so a single earphone structure is difficult to fit everyone, and movement can cause the earphone to shake, resulting in suboptimal signal acquisition and low accuracy of heart rate data measurement. UTILITARIAN CONTENT

[0003] The present application provides an earphone and an earphone assembly, which helps to improve signal acquisition quality, solve human wearing differences, and improve heart rate accuracy. Each aspect of the present application is introduced below.

[0004] In a first aspect, the present application provides an earphone, comprising: a shell, a first sensor and a second sensor are arranged at a first coordinate position and a second coordinate position of the shell respectively, the first coordinate position and the second coordinate position are determined based on a type of the earphone and a human ear model, the first sensor and the second sensor are used to contact a user's ear to obtain a physiological signal; a processing unit is configured to process the physiological signal to obtain at least one of heart rate information and blood oxygen information of the user.

[0005] In some possible implementation manners, the earphone is an open earphone, and the first coordinate position and the second coordinate position correspond to a lower half of an inner side of an auricle, or the first coordinate position corresponds to a lower half of an inner side of an auricle, and the second coordinate position corresponds to a facial position adjacent to the inner side of the auricle.

[0006] In some possible implementation manners, if the first coordinate position corresponds to a lower half of an inner side of an auricle, and the second coordinate position corresponds to a facial position adjacent to the inner side of the auricle, an included angle between the first coordinate position and the second coordinate position is configured as a preset angle.

[0007] In some possible implementation manners, the first coordinate position is lower than the second coordinate position.

[0008] In some possible implementation manners, the earphone is a headphone, and the first coordinate position and the second coordinate position correspond to a lower half of an outer side of an auricle; or the earphone is a semi-earphone, and the first coordinate position and the second coordinate position correspond to an antitragus and / or a lower half of an outer side of an auricle.

[0009] In some possible implementation manners, the first sensor and / or the second sensor can protrude from a surface of the earphone and have a circular arc shape.

[0010] In some possible implementation manners, the earphone further includes a detection apparatus located in the shell and configured to detect whether the earphone is in a wearing state; and a telescopic apparatus configured to, in response to the earphone being in the wearing state, control the first sensor and / or the second sensor to protrude from the surface of the earphone, and in response to the earphone not being in the wearing state, control the first sensor and / or the second sensor to be flush with the surface of the earphone.

[0011] In some possible implementation manners, the earphone further includes a first damper located adjacent to the first sensor, and configured to limit pressure received by the first sensor to be less than a preset pressure threshold when the first sensor protrudes from the surface of the earphone; and a second damper located adjacent to the second sensor, and configured to limit pressure received by the second sensor to be less than the preset pressure threshold when the second sensor protrudes from the surface of the earphone.

[0012] In some possible implementation manners, the first sensor and the second sensor are reflective sensors, and a time at which the first sensor emits an optical signal is different from a time at which the second sensor emits an optical signal.

[0013] In a second aspect, the present application provides an earphone assembly, including: the earphone according to the first aspect; and a charging bin configured to accommodate and charge the earphone.

[0014] According to the embodiments of the present application, the positions of the first sensor and the second sensor are determined based on the type of the earphone and a human ear model, so that the positions of the two groups of sensors are matched with the shape of the auricle, and the heart rate information and / or the blood oxygen information are detected. According to the embodiments of the present application, the sensors are in good contact with the surface of the auricle when the earphone is worn, which helps to improve the signal acquisition quality, reduce the wearing difference of the human body, and improve the accuracy of the heart rate and / or the blood oxygen detection in a motion scene. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the description of the embodiments of the present application will be briefly introduced.

[0016] Figure 1 is a principle diagram of a finger clip type oximeter provided by the related art.

[0017] Figure 2 is a component diagram of an earphone provided by an embodiment of the present application.

[0018] Figure 3 is a model diagram of an ear.

[0019] Figures 4a-4b is Figure 2 is a diagram of a possible wearing mode of an earphone.

[0020] Figure 5 is Figure 2 is a diagram of a possible implementation mode of an earphone.

[0021] Figure 6 is a diagram of PPG signal feature extraction in a cycle.

[0022] Figure 7 is Figure 5 is a possible circuit diagram of an earphone.

[0023] Figure 8 is a diagram of light absorption characteristics of oxyhemoglobin and hemoglobin at a wavelength of 600-1000 nm.

[0024] Figure 9 is a component unit / part component unit diagram of an earphone assembly provided by an embodiment of the present application. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. The same or similar reference signs are used to represent the same or similar modules in the drawings. It should be understood that the drawings are only schematic, and the scope of protection of the present application is not limited thereto.

[0026] Wireless earphones, especially true wireless stereo (TWS) earphones, are attracting the attention of many consumers due to their small size, portability, and ease of use. Among them, open earphones are favored because they do not enter the ear and do not harm the ear. With the widespread use of Bluetooth earphones and TWS earphones, consumers have become very common in their daily lives and work using wireless earphones, such as listening to music and making phone calls.

[0027] With the continuous breakthrough of electronic product technology and the fast-paced changes in life, people's attention to their own physical health has also increased. In recent years, smart wearable devices have developed rapidly. Using smart wearable devices for human health monitoring, such as the more common heart rate detection, blood oxygen detection, etc. is also one of the main directions of the development of smart wearable devices.

[0028] Figure 1 is a schematic diagram of a finger clip type oximeter provided by the related art. As shown in Figure 1 , the finger clip type oximeter 100 can be provided with a first emitter 110 and a first receiver 120. The finger clip type oximeter measures the environment, and the first emitter 110 and the first receiver 120 are arranged opposite to each other, and a transmission type measurement method is adopted. The first emitter 110 can emit red light / infrared light of different wavelengths, and the absorption rates of oxygen-containing hemoglobin and non-oxygen-containing hemoglobin for the two wavelengths are very different. By using this property, the proportion of the two types of hemoglobin can be calculated, and the functional relationship between the proportion and the arterial oxygen saturation is linear.

[0029] Heart rate is an important indicator of human state, and the normal resting heart rate of an adult is 60-100 times per minute. Implementing health monitoring (such as heart rate detection) on earphones can give TWS earphones more functions and bring more convenience to users, enriching the user experience.

[0030] To adapt to the surface of the ear, the contact surface of the earphone and the ear is also curved, but the shape and size of the user's ear vary greatly, and a single structure is difficult to adapt to everyone. In addition, unlike the flat surface of electronic products such as watches, earphones are not as secure as watches when moving, which can cause the earphones to shake, and thus there are problems of unsatisfactory signal acquisition and low heart rate data measurement accuracy.

[0031] Therefore, it is necessary to design a technical scheme of an earphone with high physiological data measurement accuracy.

[0032] Based on this, an earphone is provided in the embodiments of the present application. It is helpful to solve the difference in human wearing, improve the signal acquisition quality, and improve the heart rate accuracy. The earphone of the embodiments of the present application will be described in detail below. As shown in Figure 2 , the earphone 200 of the embodiments of the present application can include a shell 210 and a processing unit 220. Figure 2

[0033] The first coordinate position and the second coordinate position of the shell 210 are respectively provided with a first sensor 211 and a second sensor 212. The first coordinate position and the second coordinate position are determined based on the type of the earphone and the human ear model, and the first sensor and the second sensor are used to contact the user's ear to obtain physiological signals.

[0034] ​For example, the first sensor 211 is configured to emit a first light signal to the contacted ear of the user to obtain a first physiological signal. The second sensor 212 is configured to emit a second light signal to the contacted ear of the user to obtain a second physiological signal.

[0035] The processing unit 220 is configured to process the received physiological signals to obtain at least one of heart rate information and blood oxygen information of the user. For example, the heart rate information of the user can be obtained.

[0036] The processing unit 220 can be generally located in the housing. The processing unit 220 can be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc.

[0037] In some implementations, the housing 210 can be provided with a plurality of sensors, the first sensor 211 being any one of the plurality of sensors, and the second sensor 212 being any one of the plurality of sensors different from the first sensor. The positions of the plurality of sensors are determined based on the type of the earphone and the human ear model to match the auricle surface contour, to make the sensors in good contact with the auricle surface when the earphone is worn, and to help improve the detection accuracy. Meanwhile, the use of multi-channel detection helps improve the signal acquisition quality and solve the human wearing difference.

[0038] The first sensor 211 and the second sensor 212 can be sensors for heart rate detection based on photoplethysmographic (PPG) technology. PPG can be divided into transmission type and reflection type. The transmission type generally measures heart rate through blood oxygen content, and can measure two indexes of heart rate and blood oxygen saturation, but the light must penetrate the human tissue, so it can only be used in specific parts such as fingertips and earlobes. The reflection type measures the change in blood vessel volume when blood flows by reflecting light, thereby measuring heart rate. The earphone is usually worn on one side of the ear, and in some implementations, the first sensor 211 and the second sensor 212 can be reflection type sensors for PPG detection, which match the detection method when the earphone is worn on one side of the ear, occupy small space, are convenient to arrange, and are suitable for the arrangement of various types of earphones.

[0039] Figure 3 is a schematic diagram of a model of an ear. As shown in Figure 3As shown, the lower half of the auricle 310, especially the cartilage of the concha cavity 320, the antitragus 330, and the tragus 340, is relatively less and the blood vessels are relatively rich and uniform. The transmitting sensor is arranged at the lower half of the auricle, which is conducive to improving the detection accuracy.

[0040] In the embodiments of the present application, the positions of the first sensor and the second sensor are determined based on the type of the earphone and the human ear model, so that the positions of the two groups of sensors match the curved surface of the auricle, and the heart rate information and / or the blood oxygen information are detected. In the embodiments of the present application, the sensors are in good contact with the surface of the auricle when the earphone is worn, which helps to improve the signal acquisition quality. The use of two sensors can also take into account the cost and the reliability of signal acquisition, reduce the difference in human wearing, and improve the accuracy of heart rate and / or blood oxygen detection in a motion scenario.

[0041] In some implementations, the earphone 200 can be an open earphone, and the first coordinate position and the second coordinate position correspond to the lower half of the inner side of the auricle. The inner side of the auricle, also known as the back of the auricle, refers to the side of the auricle facing the rear. As shown in FIG. 2A, a possible arrangement of the over-ear earphone is illustrated. Figure 4a

[0042] In other implementations, the first coordinate position corresponds to the lower half of the inner side of the auricle, and the second coordinate position corresponds to a facial position adjacent to the inner side of the auricle, as shown in FIG. 2B. The open earphone, such as the over-ear earphone, can be in contact with the auricle and the face at the same time, and the contact positions with the auricle and the face are usually the positions of the fixed earphone, which are relatively stable. The first coordinate position and the second coordinate position are at the contact positions of the earphone with the auricle and the face, so that even in a motion state, the amount of shaking is relatively small. When the earphone is worn, the two sensors can be in good contact with the auricle or the face, which helps to improve the detection accuracy. Figure 4b

[0043] In some implementations, if the first coordinate position corresponds to the lower half of the inner side of the auricle, and the second coordinate position corresponds to a facial position adjacent to the inner side of the auricle, the included angle between the first coordinate position and the second coordinate position is configured as a preset angle, and the preset angle is determined based on the human ear model. The angle between the inner side of the auricle and the adjacent face is usually about 30-60 degrees, and the preset angle may, for example, be 30° or 45°. The angle between the first sensor 211 and the second sensor 212 matches the human ear model, which helps the two sensors to be in good contact with the auricle and the face.

[0044] In some implementations, the first coordinate position can be lower than the second coordinate position. The lower part of the shell of the open earphone is usually curved towards the tragus, and the blood vessels near the tragus are relatively rich and uniform, but the tragus has an arc and is not easy to fit. As shown in FIG. 2C, a possible arrangement of the in-ear earphone is illustrated. Figure 3 ​​The earlobe 340 above the antitragus 330 has the characteristics of uniform and stable blood vessels, and is the preferred position for detecting the heart rate signal. The second sensor 212 at the second coordinate position detects the facial position signal adjacent to the inner side of the auricle, and the first coordinate position is arranged at the lower half of the back of the auricle (such as the antitragus 330), which is conducive to good contact of the second sensor 212 with the face, and the first sensor 211 is in good contact with the lower half of the back of the auricle, thereby improving the detection accuracy.

[0045] In other implementations, the earphone 200 can be a headphone, and the first coordinate position and the second coordinate position correspond to the lower half of the outer side of the auricle. The outer side of the auricle is also called the front side of the auricle, which is the side of the auricle facing forward. Alternatively, the earphone 200 can also be a semi-in-ear earphone, and the first coordinate position and the second coordinate position correspond to the antitragus and / or the lower half of the outer side of the auricle.

[0046] Because the shape of the ear is curved, it is difficult for the sensor to completely adhere to the surface of the ear when wearing the earphone, especially in a motion state. In some implementations, the first sensor 211 and / or the second sensor 212 can protrude from the surface of the earphone 200, and the surface of the first sensor 211 and the second sensor 212 is in the shape of a circular arc. Because the sensor protrudes from the surface of the earphone 200, it helps to increase the reliability of the contact between the surface of the ear and the sensor, thereby improving the detection accuracy. The surface of the sensor is in the shape of a circular arc, which is comfortable to wear.

[0047] The protruding of the sensor from the surface of the earphone may affect the appearance and overall design of the product. In some implementations, the earphone 200 can further include a detection device and a telescopic device. The detection device is located on the housing 210 and is used to detect whether the earphone 200 is in a wearing state. For example, the detection device can include a tactile sensor and a body temperature sensor, which are used to detect whether the earphone 200 is in a wearing state. The telescopic device is used to control the first sensor 211 and / or the second sensor 212 to protrude from the surface of the earphone 200 in response to the earphone 200 being in a wearing state, and to control the first sensor 211 and / or the second sensor 212 to be flush with the surface of the earphone 200 in response to the earphone not being in a wearing state. In this way, the product design requirement that the sensor is flush with the surface of the earphone is met, and the sensor can also protrude from the surface of the earphone, thereby increasing the reliability of the contact between the surface of the ear and the sensor and improving the detection accuracy.

[0048] If the sensor protrudes too high, the force on the ear when wearing the earphone can be large, affecting the user's experience and comfort. In some implementations, the earphone can further include a first damper and a second damper. The first damper is arranged adjacent to the first sensor 211, and the first damper is used to limit the pressure received by the first sensor to be less than a preset pressure threshold when the first sensor 211 protrudes from the surface of the earphone. The preset pressure threshold is a pressure value that does not affect the comfort of the human body under pressure, which can be set according to empirical values or anthropometric design standards, for example, it can be 50N. The second damper is arranged adjacent to the second sensor 212, and the second damper is used to limit the pressure received by the second sensor 212 to be less than a preset pressure threshold when the second sensor 212 protrudes from the surface of the earphone 200. For example, when the first sensor 211 protrudes from the surface of the earphone, the gap between the ear and the earphone changes during movement. The extension device and the first damper can ensure that the first sensor is always in good contact with the ear, and the pressure received by the ear is less than the preset pressure threshold. In this way, the comfort and detection accuracy of the user wearing the earphone can be considered.

[0049] In some implementations, the first sensor 211 and the second sensor 212 can be of the same type, each including a set of infrared light and red light emitting sensors, and receiving photodiode sensors.

[0050] In reflective PPG detection, the first sensor 211 can include a first emitter and a first receiver. The first emitter is used to emit a first light signal to the user's ear, and the first receiver receives the first light signal reflected by the ear. The second sensor 212 can include a second emitter and a second receiver, the second emitter is used to emit a second light signal to the contacted ear, and the second receiver receives the second light signal reflected by the ear. The reflective sensor is located on one side of the ear, which is consistent with the way of being located on one side of the ear when wearing the earphone, occupies small space, is convenient to arrange, and can adapt to the diversification of the earphone, such as open earphone, semi-in-ear earphone, and headphone.

[0051] Specifically, the first transmitter can emit a first light signal after being powered on, and the first light signal can irradiate the ear, and the first light signal can irradiate the blood through the ear skin and be reflected by the blood. The first transmitter can include a light emitting diode (LED) or the like. In some other examples, the first transmitter can also be other sensors capable of emitting detection light to achieve heart rate detection. The first receiver can convert the light signal into an electrical signal. The reflected first light signal irradiates the first receiver, is received by the first receiver, and is converted into an electrical signal. The detection of the heart rate is achieved according to the change of the first light signal before and after being reflected. The first receiver can include a photo diode (PD) or the like. Of course, in some other examples, the first receiver can also be other sensors capable of receiving reflected detection light to achieve heart rate detection.

[0052] In some implementations, the first light signal emitted by the first sensor 211 can be an infrared signal, and the second light signal emitted by the second sensor 212 can be an infrared signal. The wavelength range of infrared light is 0.76-1000 microns. Infrared ray (IR) is also called infrared radiation, which is an electromagnetic wave between visible light and microwave. Infrared rays are divided into three wavebands: near-infrared (wavelength 0.76-1.4 microns), mid-infrared (wavelength 1.4-3 microns), and far-infrared (wavelength 3-1000 microns).

[0053] It can be understood that the first coordinate position of the first sensor and the second coordinate position of the second sensor are determined according to different types of earphones, human ear models, and different wearing manners. The first coordinate position and the second coordinate position are not fixed and can be changed as long as they can ensure good contact with the user's ear. The type of earphone can be, for example, an over-ear earphone, a semi-in-ear earphone, or a headphone.

[0054] If the first coordinate position and the second coordinate position are close to each other, or if the first sensor 211 and the second sensor 212 emit signals at the same time, signal cross and signal interference can be caused. In some implementations, the time at which the first transmitter emits the first light signal and the time at which the second transmitter emits the second light signal are different. For example, the first transmitter emits the first light signal for 20 milliseconds, and then the second transmitter emits the second light signal for 20 milliseconds. Then, the first transmitter and the second transmitter enter the next emission time period. By this time-division alternate manner, signal interference between the first light signal and the second light signal can be avoided, which helps to improve the signal quality.

[0055] Figure 5 is Figure 2 A schematic diagram of a possible implementation of an earphone. As Figure 5The first sensor 211 can include a first transmitter 211 A and a first receiver 211B. The first transmitter 211 A is configured to emit a first light signal to the user's ear, and the first receiver 211B is configured to receive the first light signal reflected by the ear. The first receiver 211B can include a photodiode (PD) or the like. The second sensor 212 can include a second transmitter 212A and a second receiver 212B. The second transmitter 212A is configured to emit a second light signal to the ear, and the second receiver 212B is configured to receive the second light signal reflected by the ear. The positions of the two sensors are determined based on the type of earphone and a human ear model, and are matched with the auricle surface profile. When the earphone is worn, the sensors are in good contact with the auricle surface, which helps to improve the detection accuracy. Meanwhile, the use of dual-channel detection helps to improve the signal acquisition quality and solve the problem of human wearing differences.

[0056] The heart continuously contracts and relaxes rhythmically, and the bioelectric changes generated by the myocardial stimulation are reflected to the body surface through the conductive tissues and body fluids around the heart, causing regular electrical changes in various parts of the body during each cardiac cycle. By detecting, collecting data, and analyzing the "regular electrical changes" of the human body, effective data of the heart rate can be obtained. With the contraction and relaxation of the heart, the blood flow in the arteries will show periodic regular changes. For example, when the heart contracts, the density of hemoglobin is high, which will reflect more infrared light (IR). When the heart relaxes, the density of hemoglobin is low, which will absorb more IR.

[0057] Figure 6 is a schematic diagram of PPG signal feature extraction in a cycle. As shown in Figure 6 , a PPG pulse is usually divided into two stages: (1) the rising edge of the pulse, which is the systolic period of the heart; and (2) the falling edge of the pulse, which is the diastolic period of the heart.

[0058] In heart rate measurement, the infrared light-emitting diode (LED) of the first transmitter 211 A and the second transmitter 212A flashes several hundred times per second, emitting infrared signals, and the first receiver 211B and the second receiver 212B can collect the original PPG signals.

[0059] Figure 7 is Figure 5 a possible signal processing schematic diagram of the earphone. As shown in Figure 7As shown, the first transmitter 211A in the first sensor 211 emits a first light signal, which is an infrared signal, the first receiver 211B receives the first light signal reflected by the ear, converts the light signal into an electrical signal, obtains a first physiological signal, and sends the first physiological signal to the processing unit 220. The second transmitter 212A in the second sensor 212 emits a first light signal, the second receiver 212B receives the first light signal reflected by the ear, converts the light signal into an electrical signal, obtains a second physiological signal, and sends the second physiological signal to the processing unit 220. The first physiological signal and the second physiological signal are of the same type. The processing unit 220 processes the data of the two groups of physiological signals according to a preset algorithm to obtain the heart rate information of the user.

[0060] For example, the processing unit 220 can perform time domain analysis on the PPG processed signal, that is, obtain the number of peaks of the PPG signal within a certain time. Heart rate (HR / min) = (FS*60 / n). Wherein, FS is the frequency within a period of time, and n is the number of peaks within the sampling time of the PPG signal. Assuming that the continuous sampling time is 5 seconds, the number of peaks within 5s is n, then the heart rate value HR = (n*60) / 5 = n*12.

[0061] In some embodiments, the processing unit 220 can use the average value of the two groups of physiological signal data for calculation. In other embodiments, the processing unit 220 can use the average value of the effective data in the two groups of physiological signals for calculation. That is, the processing unit 220 can eliminate abnormal data in the original physiological signal according to a preset threshold range to obtain effective data. The abnormal data is, for example, a value of the voltage in the original physiological signal that is obviously beyond the normal voltage range.

[0062] In some implementations, the first transmitter 211A is further configured to emit a second light signal to the ear of the user, the second light signal being, for example, a red light signal, and the first receiver 211B receives the second light signal reflected by the ear to obtain the first physiological signal. The second transmitter 212A is further configured to emit a second light signal to the ear of the user, and the second receiver 212B receives the second light signal reflected by the ear to obtain the second physiological signal. The processing unit 220 is configured to process the received first physiological signal and the second physiological signal to obtain blood oxygen information of the user. The photoplethysmography (PPG) method can be used to measure the heart rate and blood oxygen physiological indicators by using the two groups of sensors, thereby giving the earphone more functions and improving the user experience.

[0063] Specifically, when measuring the blood oxygen saturation physiological indicator, the first light signal can be an infrared (IR) signal, and the second light signal can be a red light (R) signal. The wavelength range of the red light is 620-760 nanometers, and the red light is part of the visible light spectrum. The red light is the color with the longest wavelength in the visible light spectrum.

[0064] The earphones 200 can be used to measure blood oxygen saturation (SpO2). The ratio of oxygenated hemoglobin (HbO2) to hemoglobin (Hb) in the blood is constant. Blood oxygen saturation is calculated by dividing the amount of oxygenated hemoglobin in the blood by the total amount of hemoglobin that can bind to the blood. The calculation formula is:

[0065] SpO2 = actual arterial oxygen content / total oxygen saturation*100%, that is, SpO2 = HbO2 / (HbO2+Hb)*100%.

[0066] Figure 8 The figure shows the light absorption characteristics of oxygenated hemoglobin (HbO2) and hemoglobin (Hb) at wavelengths of 600 to 1000 nm. Figure 8 As can be seen from the figure, between 600 and 800 nm, the absorption coefficient of hemoglobin (Hb) is higher than that of oxyhemoglobin, and the wavelength of red light (R) falls within this range. Between 800 and 1000 nm, the absorption coefficient of oxyhemoglobin (HbO2) is higher than that of hemoglobin, and the wavelength of infrared (IR) falls within this range.

[0067] By using two sets of sensors and red and infrared light to detect the combined ratio of Hb and HbO2, respectively, blood oxygen saturation data can be calculated. It should be noted that the specific wavelengths of red and infrared light can be set according to the detection function to be implemented.

[0068] In an embodiment of the present application, the positions of the first and second sensors are determined based on the type of headphones and the human ear model, so that the positions of the two sets of sensors match the curved surface of the auricle to detect heart rate information and / or blood oxygen information. In an embodiment of the present application, when the headphones are worn, the sensors have good contact with the surface of the auricle, which helps improve the quality of signal acquisition and reduce differences in human wearing. The use of two sensors can balance cost and signal acquisition reliability, and improve the accuracy of heart rate and / or blood oxygen detection in sports scenarios.

[0069] The following combination Figure 5 , taking the heart rate detection through the earphone 200 as an example, the process of heart rate detection by the earphone 200 is further explained.

[0070] The first emitter 211A emits a first light signal, for example, an infrared (IR) signal with a center wavelength of 940 nm, which irradiates on the skin of the ear. The first light signal is reflected by the blood after penetrating the skin tissue. The first receiver 211B receives the reflected first light signal and converts it into an electrical signal, and transmits the electrical signal to the processing unit 220, i.e., obtains a first physiological signal. At the next moment, the second emitter 212A emits a first light signal, also an IR signal with a center wavelength of 940 nm. The first light signal is reflected by the blood after penetrating the skin tissue. The second receiver 212B receives the reflected first light signal and converts it into an electrical signal, and transmits the electrical signal to the processing unit 220, i.e., obtains a second physiological signal. The processing unit 220 processes the first physiological signal and the second physiological signal to convert them into data for actually calculating the heart rate. Since the blood in the artery is flowing, the absorption and reflection of the detection light are changing, and the electrical signals converted by the first receiver 211B and the second receiver 212B are also changing. According to the changes of the electrical signals, the characteristics of the blood flow can be reflected, and the detection of the heart rate can be realized.

[0071] Taking the detection of the blood oxygen saturation by the earphone 200 as an example, the blood oxygen detection process of the earphone 200 is described.

[0072] The first emitter 211A emits a first light signal and a second light signal, for example, an infrared light (IR) with a center wavelength of 940 nm and a red light (R) with a center wavelength of 660 nm, respectively. The detection light irradiates on the skin of the ear. The first light signal and the second light signal are reflected by the blood after penetrating the skin tissue. The first receiver 211B receives the reflected first light signal and the second light signal and converts them into electrical signals, respectively, and transmits them to the processing unit 220. The second emitter 212A emits a first light signal and a second light signal, for example, an infrared light with a center wavelength of 940 nm and a red light with a center wavelength of 660 nm, respectively. The detection light is reflected by the blood after penetrating the skin tissue. The second receiver 212B receives the reflected first light signal and the second light signal and converts them into electrical signals, respectively, and transmits them to the processing unit 220. The processing unit 220 processes the electrical signals to convert them into data for calculating the blood oxygen saturation. The oxygen and hemoglobin in the blood absorb less red light with a wavelength of 660 nm and more infrared light with a wavelength of 940 nm. According to the comparison between the data signal formed when the detection light is 660 nm and the data signal formed when the detection light is 660 nm, the oxygenation degree of hemoglobin can be obtained, and the detection of the blood oxygen saturation can be realized.

[0073] The earphone assembly provided by the embodiment of the present application further comprises a second earphone. Figure 9 is a schematic diagram of a component unit / part component unit of the earphone assembly provided by the embodiment of the present application. As shown in Figure 9As shown, the earphone assembly 900 can include the earphone 200 as described in any of the preceding, and a charging case 920. The charging case 920 is configured to house and charge the earphone 200.

[0074] Those skilled in the art can understand that, Figure 9 The earphone assembly 900 is merely an example and does not constitute a limitation on the earphone assembly. More or fewer components can be included, or certain components can be combined or replaced with different components.

[0075] The integrated unit, if implemented in the form of a software functional unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, the computer program for instructing the relevant hardware to complete all or part of the processes in the above method embodiments can be stored in a computer readable storage medium, and the computer program can implement the steps of the above various method embodiments when executed by a processor. The computer program includes computer program code, which can be in the form of source code, object code, executable files or some intermediate forms. The computer readable medium at least includes any entity or device capable of carrying the computer program code to the photographing device / electronic device, recording medium, computer memory, read-only memory (ROM), random access memory (RAM), compact disc read-only memory (CD-ROM), magnetic tape, floppy disk and optical data storage device, etc. The computer readable storage medium mentioned in the present application can be a non-volatile storage medium, in other words, a non-transitory storage medium.

[0076] In the above embodiments, the description of each embodiment has its own focus, and the parts not described or recorded in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0077] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in connection with the embodiments disclosed herein can be realized in electronic hardware, or a combination of computer software and electronic hardware. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0078] In the embodiments provided in the present application, it should be understood that the disclosed apparatuses / devices and methods can be implemented in other manners. For example, the embodiments of the apparatus / device described above are merely schematic. For example, the division of the modules or units is merely logical function division, and there can be another division manner in actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between different units, can be indirect couplings or communication connections through some interfaces, devices or units, and can be in electrical, mechanical or other forms.

[0079] It should be understood that the term "comprising" as used in the specification and the appended claims indicates the presence of the recited features, integers, steps, operations, elements, and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0080] It should also be understood that the term "and / or" as used in the specification and the appended claims indicates any combination of one or more of the associated listed items and all possible combinations of the items.

[0081] As used in the specification and the appended claims, the term "if" can be interpreted as meaning "when" or "upon" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [the described condition or event] is detected" can be interpreted as meaning "upon determining" or "in response to determining" or "upon detecting [the described condition or event]" or "in response to detecting [the described condition or event]", depending on the context.

[0082] In addition, in the description of the specification and the appended claims, the terms "first", "second", and the like are used only to distinguish descriptions, and cannot be understood as indicating or implying relative importance.

[0083] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A headset, characterized in that: include: a housing, wherein a first sensor and a second sensor are respectively provided at a first coordinate position and a second coordinate position of the housing, wherein the first coordinate position and the second coordinate position are determined based on the type of the headset and a human ear model, and the first sensor and the second sensor are used to contact the user's ear to obtain a physiological signal; A processing unit is used to process the physiological signal to obtain at least one of the user's heart rate information and blood oxygen information.

2. The earphone according to claim 1, wherein The earphone is an open earphone, the first coordinate position and the second coordinate position correspond to the lower half of the inner side of the auricle, or, The first coordinate position corresponds to a lower half of the inner side of the auricle, and the second coordinate position corresponds to a facial position adjacent to the inner side of the auricle.

3. The earphone according to claim 2, wherein If the first coordinate position corresponds to the lower half of the inner side of the auricle, and the second coordinate position corresponds to a facial position adjacent to the inner side of the auricle, an angle between the first coordinate position and the second coordinate position is configured as a preset angle.

4. The earphone according to claim 3, wherein The first coordinate position is lower than the second coordinate position.

5. The earphone according to claim 1, wherein The earphone is a headphone, and the first coordinate position and the second coordinate position correspond to the lower half of the outer side of the auricle; or The earphone is a semi-in-ear earphone, and the first coordinate position and the second coordinate position correspond to the antitragus and / or the lower half of the outer side of the auricle.

6. The earphone according to any one of claims 1 to 5, characterized in that: The first sensor and / or the second sensor can protrude from the surface of the earphone and have an arc shape.

7. The earphone according to claim 6, characterized in that The headset further comprises: A detection device, located in the housing, for detecting whether the earphone is in a wearing state; The retractable device is used to control the first sensor and / or the second sensor to extend so as to protrude from the surface of the headset in response to the headset being in a worn state; and to control the first sensor and / or the second sensor to retract so as to be flush with the surface of the headset in response to the headset being not in a worn state.

8. The earphone according to claim 7, wherein: The headset further comprises: a first damper, disposed adjacent to the first sensor, and configured to limit a pressure applied to the first sensor to be less than a preset pressure threshold when the first sensor protrudes from a surface of the earphone; The second damper is arranged adjacent to the second sensor, and is used to limit the pressure applied to the second sensor to be lower than the preset pressure threshold when the second sensor protrudes from the surface of the earphone.

9. The earphone according to any one of claims 1 to 5, characterized in that: The first sensor and the second sensor are reflective sensors, and the time when the first sensor sends out the light signal is different from the time when the second sensor sends out the light signal.

10. An earphone assembly, characterized in that: include: The earphone according to any one of claims 1 to 9; The charging case is used to accommodate the earphones and charge the earphones.

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