Ear temperature measuring device, ear temperature measuring method and earphone

Abstract

The present application provides an ear temperature measurement device, an ear temperature measurement method and an earphone, wherein the measurement device comprises: at least two temperature sensors arranged along the direction of the ear canal, and the ear temperature data of the detection target is obtained through the at least two temperature sensors; the present application solves the problems of large error and low measurement accuracy in the prior art of human ear temperature measurement, and obtains the human ear temperature through the temperature data collected by at least two temperature sensors, thereby eliminating the influence of environmental factors on the temperature on the cochlear side and reducing the measurement error of the ear temperature; further, the present application uses different calculation models at different temperature measurement points to estimate the cochlear side temperature, fully considers the differences between different individuals from the model, and can more accurately measure the human ear temperature, meeting the needs of different users.

Description

Technical Field

[0001] The present invention relates to the technical field of temperature measurement, and in particular to an ear temperature measurement device, an ear temperature measurement method and an earphone. Background Art

[0002] As people's living standards improve, they pay more and more attention to their own health. As one of the four major vital signs, body temperature is particularly important for assessing a person's health status. Long-term collection of human body temperature data can, on the one hand, provide early warning of diseases such as fever, and more importantly, in the case of normalized epidemics, real-time collection of body temperature can help to detect the epidemic in a timely manner.

[0003] In order to facilitate carrying, in-ear headphones are usually used to measure human ear temperature. A thermistor is set at the sound outlet of the earphone near the ear cap to receive heat radiation in the human ear canal. However, this method is limited to measuring the temperature near the ear cap, which is easily affected by environmental factors and it is difficult to accurately distinguish whether the change in human body temperature or the change in sensor temperature caused by environmental factors is caused by human body temperature or environmental factors.

[0004] It can be seen that the human ear temperature measurement method in the prior art cannot eliminate the influence of environmental factors, resulting in large measurement errors, reducing the measurement accuracy of human body temperature, and failing to meet user needs. Summary of the invention

[0005] The present application provides an ear temperature measurement device, an ear temperature measurement method and headphones, which solve the problems of large human ear temperature measurement error and low measurement accuracy in the prior art. The human ear temperature is obtained by temperature data collected by at least two temperature sensors, eliminating the influence of environmental factors on the temperature on the cochlear side and reducing the measurement error of the ear temperature.

[0006] In a first aspect, the present application provides an ear temperature measurement device, which includes: at least two temperature sensors arranged along the ear canal direction, and ear temperature data of a detection target is obtained through the at least two temperature sensors.

[0007] Optionally, the at least two temperature sensors include: a first temperature sensor for collecting the temperature of the cochlear side close to the cochlear side; and a second temperature sensor for collecting the first ambient temperature far from the cochlear side.

[0008] Optionally, the at least two temperature sensors further include: a third temperature sensor, used for collecting a second ambient temperature away from the cochlea side.

[0009] Optionally, the measuring device further comprises: a heating module for heating the environment away from the cochlea side.

[0010] Optionally, the measuring device further includes: an ear canal size measurement module, used to obtain ear canal size parameters of the detection target.

[0011] Optionally, the ear canal size parameter includes an ear canal diameter parameter and / or an ear canal depth parameter.

[0012] Optionally, the ear canal size measurement module is further used to obtain ear canal size parameters according to properties of the silicone sleeve.

[0013] Optionally, the ear canal size measurement module includes a laser ranging sensor for measuring an ear canal depth parameter of the detection target.

[0014] In a second aspect, the present application provides an ear temperature measurement method, which is applied to an ear temperature measurement device, wherein the ear temperature measurement device includes at least two temperature sensors arranged along the ear canal direction, and the measurement method includes: obtaining the cochlear side temperature close to the cochlear side and the first ambient temperature away from the cochlear side according to the at least two temperature sensors; and obtaining the ear temperature data of the detection target according to the cochlear side temperature and the first ambient temperature.

[0015] Optionally, the ear temperature data of the detection target is obtained according to the cochlear side temperature and the first ambient temperature, including: obtaining the thermal conduction parameters of the ear canal of the detection target; and calculating the ear temperature data of the detection target according to the thermal conduction parameters, the cochlear side temperature and the first ambient temperature.

[0016] Optionally, obtaining the thermal conduction parameter of the target ear canal includes: obtaining the ear canal thermal conduction parameter according to the ear canal size parameter.

[0017] Optionally, obtaining the thermal conduction parameters of the detection target ear canal includes: obtaining physiological parameters of the detection target; inputting the physiological parameters into a trained target learning model for classification to obtain the thermal conduction parameters of the detection target ear canal.

[0018] Optionally, when the ear temperature measurement device also includes a heating module, obtaining the thermal conduction parameters of the target ear canal to be detected includes: turning on the heating module to obtain a first temperature close to the cochlear side and a second temperature away from the cochlear side during a first thermal equilibrium; turning off the heating module to obtain a third temperature close to the cochlear side and a fourth temperature away from the cochlear side during a second thermal equilibrium; and obtaining the thermal conduction parameters of the target ear canal to be detected based on the first temperature, the second temperature, the third temperature and the fourth temperature.

[0019] Optionally, when the ear temperature measurement device also includes a heating module, the ear temperature data of the detection target is obtained according to the cochlear side temperature and the first ambient temperature, including: turning on the heating module to obtain a first temperature change process of a first temperature observation point and a second temperature change process of a second temperature observation point under a heating state; and calculating the ear temperature according to key features of the first temperature change process and the second temperature change process.

[0020] Optionally, when the ear temperature measurement device also includes a heating module, the ear temperature data of the detection target is obtained according to the cochlear side temperature and the first ambient temperature, including: turning off the heating module, obtaining the third temperature change process of the first temperature observation point in a non-heating state and the fourth temperature change process of the second temperature observation point; and calculating the ear temperature according to the key features of the third temperature change process and the fourth temperature change process.

[0021] Optionally, when the at least two temperature sensors include three sensors, the measuring method includes: obtaining the cochlear side temperature close to the cochlear side, the first ambient temperature away from the cochlear side, and the second ambient temperature away from the cochlear side according to the three temperature sensors; and calculating the ear temperature data of the detection target according to a polynomial combination of at least two items of the cochlear side temperature, the first ambient temperature, and the second ambient temperature.

[0022] Optionally, according to the cochlear temperature and the first ambient temperature, a calculation formula for obtaining the ear temperature data of the detection target includes:

[0023]

[0024] Among them, T ear (t) is the ear temperature data, T s is the cochlear temperature close to the cochlear side, T e is the first ambient temperature away from the cochlea, k 0 ~k i+4 is the characteristic temperature measurement parameter.

[0025] In a third aspect, the present application provides an earphone, which includes the above-mentioned ear temperature measuring device.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The present application deploys at least two temperature sensors along the direction of the ear canal, and obtains the human ear temperature through the temperature data collected by at least two temperature sensors, thereby eliminating the influence of environmental factors on the temperature on the cochlear side and reducing the measurement error of the ear temperature; further, the present application uses different temperature measurement points and different calculation models to estimate the temperature on the cochlear side, fully considering the differences between different individuals from the model, and can more accurately measure the human ear temperature to meet the needs of different users. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The figure shows a schematic diagram of the structure of an ear temperature measuring device provided in an embodiment of the present application;

[0029] Figure 2 Shown is a schematic structural diagram of another ear temperature measuring device provided in an embodiment of the present application;

[0030] Figure 3 The figure is a schematic diagram of a flow chart of an ear temperature measurement method provided in an embodiment of the present application;

[0031] Figure 4 Shown is a structural schematic diagram of another ear temperature measurement device provided in an embodiment of the present application;

[0032] Figure 5 The figure is a schematic diagram of the structure of another ear temperature measuring device provided in an embodiment of the present application;

[0033] Figure 6 Shown is a schematic flow chart of another ear temperature measurement method provided in an embodiment of the present application;

[0034] Figure 7 The figure shows a pulse schematic diagram of adjusting the power of a heating module provided in an embodiment of the present application;

[0035] Figure 8 Shown is a circuit diagram of an ear canal size measurement module provided in an embodiment of the present application;

[0036] Fig. 9 Shown is a schematic diagram of a method for determining a thermal resistance ratio provided in an embodiment of the present application;

[0037] Fig.10 Shown is a schematic diagram of a method for determining ear canal size provided in an embodiment of the present application. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0039] In a first aspect, the present invention provides an ear temperature measuring device, which specifically includes the following embodiments:

[0040] Embodiment 1

[0041] Figure 1 FIG. 1 is a schematic diagram of the structure of an ear temperature measuring device provided in an embodiment of the present application. Figure 1 As shown, the ear temperature measuring device comprises:

[0042] A first temperature sensor and a second temperature sensor are arranged along the direction of the ear canal, wherein the first temperature sensor is arranged on the side close to the cochlea, and is used to collect the temperature of the cochlear side close to the cochlea; the second temperature sensor is arranged on the side away from the cochlea, and is used to collect the first ambient temperature away from the cochlea side, and the ear temperature data of the detection target is acquired through the cochlear side temperature and the first ambient temperature.

[0043] It should be noted that the present application is applicable to application scenarios where the temperature on the cochlear side is greater than the ambient temperature. Since the relatively low ambient temperature will affect the relatively high temperature on the cochlear side, the temperature on the cochlear side measured by one sensor is lower than the actual human ear temperature, resulting in ear temperature measurement errors. The detection target in this embodiment can be a human body or a living animal.

[0044] In this implementation, the temperature distribution of the human ear is only considered along the ear canal direction. The formula for estimating ear temperature is:

[0045] T ear =T s +α·(T s -T e )+o(T s ) (1)

[0046] Among them, T ear is the ear temperature data, T s is the cochlear temperature close to the cochlear side, T e is the first ambient temperature away from the cochlea, α is the ratio of the thermal resistance of the ear canal to the thermal resistance of the sensor, o(T s ) is the error factor and can generally be ignored.

[0047] Optionally, α is the ratio of the thermal resistance of the ear canal to the thermal resistance of the sensor. There are certain differences between different people. Different α can be selected for ear temperature estimation based on physiological parameters such as age, height, weight, and gender. Typically, there are three values ​​of α. Children under 3 months old take α 1 , α for children aged 3-36 months 2 , people over 36 months old take α 3 .

[0048] It should be noted that in this embodiment, two temperature sensors are arranged along the ear canal direction, and the thermal resistance value between the two temperature sensors can be obtained by calibration before leaving the factory. The human ear canal extends from the auricle to the tympanic membrane, is about 2.5 cm (1 inch) long, and has a diameter of about 0.7 cm (0.3 inch), which varies slightly according to age. Therefore, the thermal resistance value of the ear canal can be obtained by statistical experimental data to obtain an empirical value. Referring to formula (1), the ear temperature data can be calculated based on the temperature readings of the two sensors, and the ear temperature data is the human body temperature; in this embodiment, the sensor in the ear temperature measurement device does not have data processing capabilities, and can output temperature digital or directly output analog voltage values ​​(such as NTC temperature sensors, PTC temperature sensors, etc.) through communication interfaces such as I2C, UART, SPI, etc., and output to an external processor for calculating the ear temperature data, which simplifies the design and processing and reduces the cost.

[0049] Embodiment 2

[0050] Figure 2 FIG. 1 is a schematic diagram of the structure of another ear temperature measuring device provided in an embodiment of the present application. Figure 2 As shown, on the basis of the scheme of embodiment 1, a temperature sensor, namely a third temperature sensor, is added. The third temperature sensor is also arranged far away from the cochlea, and is used to collect a second ambient temperature far away from the cochlea side. The ear temperature data of the detection target is calculated through the cochlear side temperature, the first ambient temperature and the second ambient temperature.

[0051] It should be noted that in order to further eliminate the influence of ambient temperature on the temperature on the cochlear side and improve the estimation accuracy of the temperature on the cochlear side, this embodiment sets two sensors away from the cochlear side, and both sensors are used to collect ambient temperature at different positions; further, the third temperature sensor can be exposed outside the cochlea and is only used to collect ambient temperature.

[0052] The ear temperature measurement method using three-way sensors in this embodiment includes the following steps: obtaining the cochlear temperature close to the cochlear side, the first ambient temperature away from the cochlear side, and the second ambient temperature away from the cochlear side according to the three-way temperature sensor; calculating the ear temperature data of the detection target according to a polynomial combination of at least two items of the cochlear temperature, the first ambient temperature, and the second ambient temperature; the ear temperature data calculation formula of the detection target is:

[0053] T ear =T s +(T s -T e )*x 1 +(T s -T a )*x 2 (2)

[0054] Among them, T ear is the ear temperature data, T s is the cochlear temperature close to the cochlear side, T e is the first ambient temperature away from the cochlea, T a is the second ambient temperature away from the cochlea, x 1 、x 2 is the unknown model parameter, which can be obtained by collecting a large amount of data, through least squares fitting or determined by machine learning algorithm. 1 、x 2 It can be considered as a model parameter that is common to all people. Furthermore, when fitting the given model parameters, different stages can be divided according to different ambient temperatures. In different ambient temperature ranges, different parameters can be used to estimate ear temperature, which can further improve the estimation accuracy.

[0055] By analogy, the present application can also provide embodiments such as four-way temperature sensors and five-way temperature sensors to further eliminate the influence of ambient temperature on the temperature of the cochlear side. The difference between different embodiments is that different calculation formulas are used to obtain ear temperature data.

[0056] In combination with Example 1 and Example 2, it can be seen that the ear temperature measurement device provided in the present application includes: at least two temperature sensors arranged along the ear canal direction, and the ear temperature data of the detection target is obtained through the at least two temperature sensors.

[0057] Figure 3 FIG. 1 is a flow chart of an ear temperature measurement method provided in an embodiment of the present application, as shown in FIG. Figure 3 As shown, the measurement method adopted by the ear temperature measurement device specifically includes the following steps:

[0058] Step S101, acquiring the cochlear temperature close to the cochlear side and the first ambient temperature far from the cochlear side according to the at least two temperature sensors;

[0059] Step S102: Acquire ear temperature data of the detection target according to the cochlear temperature and the first ambient temperature.

[0060] It should be noted that Figure 3 The specific steps have been described in detail in Example 1 and Example 2, and will not be repeated here.

[0061] Compared with the prior art, this application has the following beneficial effects:

[0062] The present application deploys at least two temperature sensors along the direction of the ear canal, and obtains the human ear temperature through the temperature data collected by at least two temperature sensors, thereby eliminating the influence of environmental factors on the temperature on the cochlear side and reducing the measurement error of the ear temperature; further, the present application uses different temperature measurement points and different calculation models to estimate the temperature on the cochlear side, fully considering the differences between different individuals from the model, and can more accurately measure the human ear temperature to meet the needs of different users.

[0063] Embodiment 3

[0064] Figure 4 FIG. 2 is a schematic diagram of the structure of another ear temperature measuring device provided in an embodiment of the present application; Figure 4 As shown, this embodiment adds an ear temperature data processing module to the above-mentioned embodiment one and embodiment two, and the ear temperature data processing module is electrically connected to the first temperature sensor and the second temperature sensor, respectively, and is used to calculate the ear temperature data of the detection target based on the thermal resistance value ratio between the detection target ear canal and the temperature sensor, the cochlear side temperature and the first ambient temperature.

[0065] In this embodiment, the ear temperature data processing module can also be electrically connected to the first temperature sensor, the second temperature sensor and the third temperature sensor, respectively, to calculate the ear temperature data of the detection target based on the cochlear side temperature, the first ambient temperature and the second ambient temperature.

[0066] It should be noted that this embodiment integrates the ear temperature data processing module into the ear temperature measuring device, so that the measuring device has both temperature collection and data processing capabilities, directly completes the collection of measurement point temperature and ear temperature estimation, increases the function of the ear temperature measuring device, and improves the application scope of the product.

[0067] Embodiment 4

[0068] Figure 5FIG. 2 is a schematic diagram of the structure of another ear temperature measuring device provided in an embodiment of the present application; Figure 5 As shown, embodiment 4 adds a heating module on the basis of embodiment 3, and the heating module is arranged near the second temperature sensor side. The heating module is electrically connected to the ear temperature data processing module and is used for heating according to the control signal output by the ear temperature data processing module.

[0069] Figure 6 FIG. 2 is a flow chart of another ear temperature measurement method provided in an embodiment of the present application; Figure 6 As shown, the ear temperature measurement method based on the ear temperature measurement device provided in this embodiment specifically includes the following steps:

[0070] Step S201, turning on the heating module to obtain a first temperature at a first thermal equilibrium;

[0071] Step S202, turning off the heating module, and acquiring the cochlear temperature and the first ambient temperature at the second thermal equilibrium;

[0072] Step S203, obtaining a thermal resistance ratio between the detection target ear canal and at least two temperature sensors according to the first temperature, the cochlear temperature and the first ambient temperature;

[0073] Step S204: Acquire ear temperature data of the detection target according to the thermal resistance ratio, the cochlear temperature and the first ambient temperature.

[0074] It should be noted that in order to quickly make the two sensors enter a steady state, a heating module is arranged near the second temperature sensor (that is, away from the cochlea). At this time, the most basic solution is the zero heat flow method, which controls the heating power of the heating module through the ear temperature data processing module, so that when the temperature difference between the ambient side and the side close to the cochlea is zero, thermal equilibrium (that is, the first thermal equilibrium) is reached. At this time, the temperatures collected by the two sensors are both the first temperature value, which is also the ear temperature T ear After the heating module is turned off, thermal equilibrium is reached again (i.e., the second thermal equilibrium), and T e and T s At this time, according to T ear 、T e and T s Calculate the thermal resistance ratio α, where the calculation formula of the thermal resistance ratio α is:

[0075] α=(T ear -T s ) / (T s -T e ) (3)

[0076] According to formula (3), the thermal resistance ratio α in steady state is obtained. The specific calculation formula for subsequent body temperature monitoring can be as follows:

[0077] T ear =T s +α·(T s -T e ) (4)

[0078] It should be noted that the typical thermal balance judgment rule is that the temperature change within 10 minutes does not exceed 0.05. The specific judgment conditions and time are related to the sensor and measurement environment.

[0079] In this embodiment, the heating module can be a heating resistor device, one end of which is grounded and the other end is connected to the ear temperature data processing module, and is powered by the ear temperature data processing module PIN pin to achieve heating. The ear temperature data processing module controls the pulse signal of the heating power of the heating module, such as Figure 7 As shown, the heating power is controlled by controlling the duty ratio (t1:t2), and the duty ratio is increased when the temperatures on both sides are close to the same.

[0080] Embodiment 5

[0081] In this embodiment, the ear temperature measurement device further includes an ear canal size measurement module, which is used to obtain ear canal size parameters of the detection target, wherein the ear canal size parameters include ear canal diameter parameters and / or ear canal depth parameters.

[0082] In this embodiment, the ear canal size measurement module is further used to obtain ear canal size parameters according to the properties of the silicone sleeve, wherein the properties of the silicone sleeve include the size of the silicone sleeve and / or the ID of the silicone sleeve.

[0083] In another embodiment, the ear temperature measuring device further includes: a silicone sleeve, used to fix the ear temperature measuring device in the ear canal of the detection target, and the ear canal size measurement module is in contact with the silicone sleeve, so that the ear canal size measurement module obtains the ear canal size parameters of the detection target according to the properties of the silicone sleeve.

[0084] It should be noted that in order to adapt to the ear canal sizes of humans or other animals of different age groups, the ear temperature measuring device can be firmly fixed in the ear canal of the detection target through the silicone sleeve. The silicone sleeve provided in this embodiment includes silicone sleeves of several specifications. The corresponding ear canal diameter can be obtained by using silicone sleeves of different specifications. Before use, the user can input the model of the silicone sleeve through the button on the smart terminal or the silicone sleeve storage bin to obtain the ear canal diameter parameter of the detection target.

[0085] Optionally, the ear temperature measuring device provided in the embodiment also includes a silicone sleeve storage bin. When the storage bin only stores a pair of silicone sleeves, the diameter corresponding to the stored silicone sleeves is the diameter of the user's ear canal; when the storage bin can store all silicone sleeves, the diameter corresponding to the missing silicone sleeves is the diameter of the user's ear canal.

[0086] In this embodiment, the silicone sleeve storage bin includes several standard support rods, and the support rods are integrated with storage units such as Flash, EEPROM, OTP and other storage devices. Each silicone sleeve is equipped with a support rod, and the support rod records the diameter information of the silicone sleeve. The support rod can be divided into two parts. The diameter of the silicone sleeve part corresponds to the silicone sleeve; the diameter of the part in contact with the base is unified, and the diameter of the corresponding hole position on the charging bin is the same to facilitate fixation. The part in contact with the base or the silicone sleeve part is integrated with a storage chip, and conductive contacts are arranged on the base part. The contacts are electrically connected to the chip. The charging bin obtains the ear canal diameter information corresponding to the support rod stored in the chip through a single-line communication protocol, I2C, SPI, etc.

[0087] Optionally, the support rod in this embodiment may be an independent handheld device specifically used for measuring the depth and diameter of the ear canal.

[0088] Figure 8 FIG. 1 is a circuit diagram of an ear canal size measurement module provided in an embodiment of the present application. Figure 8 As shown, the ear canal size measurement module includes:

[0089] A first measuring contact, a second measuring contact and a voltage dividing resistor;

[0090] The first measuring contact and the second measuring contact are electrically connected to the silicone sleeve respectively, the first end of the voltage-dividing resistor is connected to the second measuring contact, the second end of the voltage-dividing resistor is grounded, and the first end of the voltage-dividing resistor is also connected to the ear temperature data processing module, so that the ear temperature data processing module obtains the ear canal diameter of the detection target according to the voltage of the voltage-dividing resistor.

[0091] It should be noted that the silicone sleeve is provided with an ID chip, which includes an RFID chip. Different specifications of silicone sleeves have different capacitance values ​​or resistance values. Taking the resistance value as an example, two metal contacts are provided on the ear canal size measurement module. Figure 8 The circuit shown collects the resistance information of the silicone sleeve, thereby identifying the specification information of the current silicone sleeve. More specifically, the silicone sleeve can be doped with different conductive materials during the processing process, and the resistance value of the silicone sleeve with a small size is also small by mixing the doped conductive materials. Figure 8As shown, different silicone sleeves are connected to the circuit and divided by the voltage-dividing resistor. The voltage collected by the ADC module or the ear temperature data processing module at the first end of the voltage-dividing resistor is different. The larger the resistance of the silicone sleeve, the smaller the collected voltage, so that the specifications of the silicone sleeve can be distinguished, and the size information of the silicone sleeve can be obtained. The size information of the silicone sleeve corresponds to the diameter of the human ear, so the diameter of the user's ear canal can be obtained.

[0092] In this embodiment, the measurement of the ear canal depth may also integrate the SLDS-D05 laser ranging sensor to measure the depth of the ear canal.

[0093] After obtaining the depth L and diameter d of the ear canal based on the above method, the ear canal thermal resistance value θ e The calculation formula is:

[0094] θ e =L / (λ·S) (5)

[0095] In the formula, θ e is the thermal resistance of the ear canal, λ is the thermal conductivity of air, L is the depth of the ear canal, and S is the cross-sectional area of ​​the ear canal. Ideally, the ear canal can be approximated as a cylinder, and the cross-sectional area of ​​the ear canal can be estimated by the diameter d, using the following calculation formula:

[0096] S=0.25·π·d 2 (6)

[0097] Thermal resistance value θ between two temperature sensors in ear temperature measurement device T It can be calibrated before leaving the factory, so the thermal resistance ratio α between the ear canal and the sensor is calculated as:

[0098] α=θ e / θ T (7)

[0099] It should be noted that the ear temperature measurement device involved in the above-mentioned embodiments 1 to 5 also includes a sensor carrier for carrying at least two temperature sensors.

[0100] In a second aspect, the present invention provides an ear temperature measurement method, which specifically includes the following embodiments:

[0101] In this embodiment, the application provides an ear temperature measurement method, which is applied to an ear temperature measurement device, wherein the ear temperature measurement device includes at least two temperature sensors arranged along the ear canal direction, and the measurement method includes: obtaining the cochlear side temperature close to the cochlear side and the first ambient temperature away from the cochlear side according to the at least two temperature sensors; and obtaining the ear temperature data of the detection target according to the cochlear side temperature and the first ambient temperature.

[0102] In this embodiment, the ear temperature data of the detection target is obtained according to the cochlear side temperature and the first ambient temperature, including: obtaining the thermal conduction parameters of the ear canal of the detection target; and calculating the ear temperature data of the detection target according to the thermal conduction parameters, the cochlear side temperature and the first ambient temperature.

[0103] Optionally, obtaining the thermal conduction parameter of the target ear canal includes: obtaining the ear canal thermal conduction parameter according to the ear canal size parameter.

[0104] Optionally, in this embodiment, when the ear temperature measurement device also includes a heating module, obtaining the thermal conduction parameters of the target ear canal to be detected includes: turning on the heating module to obtain a first temperature close to the cochlear side and a second temperature away from the cochlear side during a first thermal equilibrium; turning off the heating module to obtain a third temperature close to the cochlear side and a fourth temperature away from the cochlear side during a second thermal equilibrium; and obtaining the thermal conduction parameters of the target ear canal to be detected based on the first temperature, the second temperature, the third temperature and the fourth temperature.

[0105] In this embodiment, when the at least two temperature sensors include three sensors, the measuring method includes: obtaining the cochlear side temperature close to the cochlear side, the first ambient temperature away from the cochlear side, and the second ambient temperature away from the cochlear side according to the three temperature sensors; calculating the ear temperature data of the detection target according to a polynomial combination of at least two items of the cochlear side temperature, the first ambient temperature, and the second ambient temperature; the ear temperature data calculation formula of the detection target is:

[0106] T ear =T s +(T s -T e )*x 1 +(T s -T a )*x 2 (8)

[0107] Among them, T ear is the ear temperature data, T s is the cochlear temperature close to the cochlear side, T e is the first ambient temperature away from the cochlea, T a is the second ambient temperature away from the cochlea, x 1 、x 2 are the model parameters to be determined.

[0108] It should be noted that the ear temperature measurement method provided in this embodiment has been described in detail in the above-mentioned embodiments 1 to 5, and will not be repeated here.

[0109] Embodiment 6

[0110] In this embodiment, obtaining the thermal conduction parameters of the detection target ear canal includes: obtaining physiological parameters of the detection target; inputting the physiological parameters into a trained target learning model for classification to obtain the thermal conduction parameters of the detection target ear canal.

[0111] It should be noted that, in this embodiment, the thermal conductivity parameter of the target ear canal detected includes detecting the ratio of the thermal resistance values ​​of the target ear canal and at least two temperature sensors; Fig. 9 FIG. 1 is a schematic diagram of a method for determining a thermal resistance ratio provided in an embodiment of the present application; Fig. 9 As shown, in this embodiment, volunteers can be recruited, their age, height, and weight can be counted, and the cochlear temperature T can be measured using our ear temperature measurement device. s , the first ambient temperature T e , and then use a medical infrared ear thermometer to measure the corresponding ear temperature data T ear , ignoring o(T s )(i.e. o(T s )≈0), the corresponding α is calculated using the above formula (1), and the relationship between age, height, weight and ear canal thermal parameter α is statistically analyzed using machine learning tools. To simplify the statistical process, the α calculated using formula (1) is taken as (α 1 , α 2 , α 3 ) is used as the current α value.

[0112] Fig.10 FIG. 1 is a schematic diagram of a method for determining ear canal size provided by an embodiment of the present application. The ear canal depth and ear canal diameter can be used as a physiological parameter. Fig.10 The process is used to obtain it.

[0113] Embodiment 7

[0114] In this embodiment, when the ear temperature measurement device also includes a heating module, the ear temperature data of the detection target is obtained according to the cochlear side temperature and the first ambient temperature, including: turning on the heating module to obtain a first temperature change process of a first temperature observation point and a second temperature change process of a second temperature observation point in a heating state; and calculating the ear temperature according to key features of the first temperature change process and the second temperature change process.

[0115] Optionally, when the ear temperature measurement device also includes a heating module, the ear temperature data of the detection target is obtained according to the cochlear side temperature and the first ambient temperature, including: turning off the heating module, obtaining the third temperature change process of the first temperature observation point in a non-heating state and the fourth temperature change process of the second temperature observation point; and calculating the ear temperature according to the key features of the third temperature change process and the fourth temperature change process.

[0116] It should be noted that the key features of the temperature change process include but are not limited to one or more of a steady-state temperature value, a specific temperature value, a temperature change rate and a maximum value of the temperature change rate; in this embodiment, the ear temperature can be calculated based on the key features of the first temperature change process and the key features of the second temperature change process, and can also be calculated based on the key features of the third temperature change process and the key features of the fourth temperature change process; further, the ear temperature can be calculated based on the key features of the first temperature change process, the key features of the second temperature change process, the key features of the third temperature change process and the key features of the fourth temperature change process.

[0117] In another embodiment, when the ear temperature measurement device also includes a heating module, obtaining the ear temperature data of the detection target based on the cochlear temperature and the first ambient temperature includes: turning on the heating module to obtain the heated cochlear temperature and the heated first ambient temperature; turning off the heating module to obtain the unheated cochlear temperature and the unheated first ambient temperature; obtaining the ear temperature data of the detection target based on the heated cochlear temperature, the heated first ambient temperature, the unheated cochlear temperature and the unheated first ambient temperature.

[0118] It should be noted that the present embodiment adds a heating module, and different local thermal environments can be constructed to determine the undetermined coefficient y in the formula in real time. Ignoring the error factor in formula (1), the ear temperature data calculation formula is simplified to:

[0119] T ear =T s +(T s -T e )*y (9)

[0120] This embodiment is divided into two environments: heating and non-heating, so that two thermal environment equations can be constructed:

[0121]

[0122] Solving equation (10), we can get the ear temperature calculation formula:

[0123]

[0124] Among them, T in the above formula soff The temperature of the cochlear side without heating, T eoff The first ambient temperature without heating, T son Heating cochlear side temperature, T eon The first ambient temperature is heated.

[0125] Furthermore, one can Figure 7The method described above changes the duty cycle to obtain multiple heating conditions, thereby obtaining multiple sets of steady-state temperatures (T S ,T S -T e ), using the least squares method to find T s and (T S -T e ) for linear fitting, the intercept is the ear temperature T ear At this time, the thermal resistance ratio α can be obtained according to the method described in formula (3) and formula (1).

[0126] Embodiment 8

[0127] In this embodiment, in order to improve the temperature measurement accuracy and temperature measurement speed, more characteristic temperature measurement parameters can be introduced. According to the cochlear side temperature and the first ambient temperature, the calculation formula for obtaining the ear temperature data of the detection target includes:

[0128]

[0129] Among them, T ear (t) is the ear temperature data, T s is the cochlear temperature close to the cochlear side, T e is the first ambient temperature away from the cochlea, k 0 ~k i+4 is the characteristic temperature measurement parameter.

[0130] It should be noted that T s The temperature of the cochlear side close to the cochlea is more affected by the ear temperature. e It is the first ambient temperature far from the cochlea and is greatly affected by the environment; dT s (t) / dt reflects the temperature change close to the cochlea, which can correct the error caused by the fluctuation of ambient temperature, wearing fluctuation and ear temperature fluctuation during the measurement process; dT e (t) / dt reflects the temperature change on the side close to the environment, which can correct the error caused by the fluctuation of ambient temperature, wearing fluctuation and ear temperature fluctuation during the measurement process; (T s -T e ) i It reflects the temperature change gradient of the cochlea along the ear canal and can compensate for the temperature gradient loss between the cochlear constant temperature point and the earphone temperature measurement point. Generally, N is not greater than 3.

[0131] Furthermore, the temperature of the temperature measurement microenvironment is a gradual and stable process. If a single characteristic temperature measurement parameter is directly used in the entire temperature measurement process, the temperature measurement accuracy will be lost. s (t) / dt or dT e(t) / dt divides the stabilization process of the microenvironment into stages. For example, (0.2, +∞) is regarded as the initial unstable stage, and a set of characteristic temperature measurement parameters are trained, even as an unmeasurable stage; (0.1, 0.2] is the second stage, the gradual stabilization stage, and a set of characteristic temperature measurement parameters can be trained for ear temperature estimation; (0.05, 0.1] is the third stage, the stabilization stage, and a set of characteristic temperature measurement parameters can be trained for ear temperature estimation; (-∞, 0.05] is basically stable, and a set of characteristic temperature measurement parameters can be trained for ear temperature estimation.

[0132] In a third aspect, the present application provides an earphone, which includes the ear temperature measurement device described in Embodiments 1 to 5.

[0133] Finally, it should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0134] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A method for measuring ear temperature, characterized in that: Applicable to an ear temperature measuring device, the ear temperature measuring device comprises at least two temperature sensors arranged along the ear canal direction, and the measuring method comprises: Acquiring the cochlear temperature close to the cochlear side and the first ambient temperature far from the cochlear side according to the at least two temperature sensors; According to the cochlear temperature and the first ambient temperature, ear temperature data of the detection target is obtained; wherein the calculation formula for obtaining the ear temperature data of the detection target includes: in, For ear temperature data, is the temperature of the cochlear side close to the cochlea, is the first ambient temperature away from the cochlea, is the characteristic temperature measurement parameter; It reflects the temperature changes close to the cochlea, and can correct the errors caused by the fluctuations in ambient temperature, wearing and ear temperature during the measurement process. It reflects the temperature change on the side close to the environment, and can correct the error caused by the fluctuation of ambient temperature, wearing fluctuation and ear temperature fluctuation during the measurement process; It reflects the temperature gradient of the cochlea along the direction of the ear canal, and can compensate for the temperature gradient loss between the cochlear constant temperature point and the earphone temperature measurement point; N is not greater than 3; a single characteristic temperature measurement parameter directly used in the entire temperature measurement process will lose temperature measurement accuracy; or Divide the process of microenvironment stabilization into stages; It is regarded as the initial unstable stage, and a set of characteristic temperature measurement parameters are trained, or even as an unmeasurable stage; In the second stage, the gradual stabilization stage, a set of characteristic temperature measurement parameters can be trained for ear temperature estimation; In the third stage, which tends to be stable, a set of characteristic temperature measurement parameters can be trained to estimate ear temperature; For basic stability, a set of characteristic temperature measurement parameters can be trained for ear temperature estimation.

2. The ear temperature measurement method according to claim 1, characterized in that: The measuring device comprises: At least two temperature sensors are arranged along the ear canal direction, and the ear temperature data of the detection target is obtained through the at least two temperature sensors.

3. The ear temperature measurement method according to claim 2, characterized in that: The at least two temperature sensors include: A first temperature sensor is used to collect the temperature of the cochlea side close to the cochlea side; The second temperature sensor is used to collect a first ambient temperature away from the cochlea.

4. The ear temperature measurement method according to claim 3, characterized in that: The at least two temperature sensors also include: The third temperature sensor is used to collect a second ambient temperature away from the cochlea side.

5. The ear temperature measurement method according to claim 3, characterized in that: The measuring device also includes The heating module is used to heat the environment away from the cochlea.

6. The ear temperature measurement method according to any one of claims 1 to 5, characterized in that: The measuring device also includes: The ear canal size measurement module is used to obtain the ear canal size parameters of the detection target.

7. The ear temperature measurement method according to any one of claim 6, characterized in that: The ear canal size parameter includes an ear canal diameter parameter and / or an ear canal depth parameter.

8. The ear temperature measurement method according to claim 7, characterized in that: The ear canal size measurement module is also used to obtain ear canal size parameters according to the properties of the silicone sleeve.

9. The ear temperature measurement method according to claim 7, characterized in that: The ear canal size measurement module includes a laser ranging sensor for measuring the ear canal depth parameter of the detection target.

10. A headset, characterized in that: The earphone applies the ear temperature measurement method described in any one of claims 1-9.

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