Wearable device for estimating amount of sweat loss and control method therefor

Abstract

Provided is a wearable device for estimating sweat loss. The wearable device comprises: at least one first sensor; at least one second sensor including a plurality of electrodes; a memory for storing one or more computer programs; and at least one processor communicatively coupled to the at least one first sensor, the at least one second sensor, and the memory. The one or more computer programs include computer-executable instructions that, when individually or collectively executed by the at least one processor, cause the wearable device to: use the at least one first sensor to identify whether a user wearing the wearable device starts exercise; identify a point in time of perspiration of the user by using the at least one second sensor according to the identification that the user starts exercise; and determine the level of perspiration of the user on the basis of the identified point in time of perspiration.

Description

Wearable device for estimating sweat loss and control method thereof

[0001] The present disclosure relates to a wearable device for estimating sweat loss and a control method thereof.

[0002] The variety of services and additional features offered through wearable devices, such as smartwatches, is steadily increasing. To enhance the utility of these devices and satisfy the diverse needs of users, telecommunications service providers and electronic device manufacturers are competitively developing electronic devices that offer a variety of features and differentiate themselves from competitors. Consequently, the various functions offered through wearable devices are also becoming increasingly sophisticated.

[0003] The above information is provided solely as background information to assist in understanding the disclosure. No determination has been made, and no assertion is made, as to whether the above information constitutes prior art in connection with the disclosure.

[0004] According to related technologies, only information on average sweat loss was provided based on basic information such as the user's gender, age, and weight, and information on sweat loss was not provided by taking into account the user's sweating characteristics.

[0005] Aspects of the present disclosure address at least the problems and / or drawbacks mentioned above and provide at least the advantages described below. Accordingly, aspects of the present disclosure provide a wearable device for estimating sweat loss and a method for controlling the same.

[0006] Additional aspects will be presented in part in the description that follows, and in part will be obvious from the description or can be learned by practicing the examples presented.

[0007] According to an aspect of the present disclosure, a wearable device is provided. The wearable device includes at least one first sensor, at least one second sensor including a plurality of electrodes, a memory storing one or more programs, and one or more processors synchronically connected to the first sensor, the second sensor, and the memory, wherein the one or more programs include computer-executable instructions that, when executed by the one or more processors, cause the wearable device to identify whether a user wearing the wearable device has started exercising using the at least one first sensor, identify a time point of sweating of the user using the at least one second sensor when it is identified that the user has started exercising, and determine an extent of sweat loss of the user based on the identified time point of sweating.

[0008] According to another aspect of the present disclosure, a method is provided, which is performed by a wearable device including at least one first sensor and at least one second sensor including a plurality of electrodes. The method may include an operation of identifying whether a user wearing the wearable device has started exercising using the at least one first sensor; an operation of identifying a point in time when the user has started exercising using the at least one second sensor; and an operation of determining, by the wearable device, an extent of sweat loss of the user based on the identified point in time when the user has started exercising.

[0009] According to another aspect of the present disclosure, one or more non-transitory computer-readable storage media storing one or more computer programs include computer-executable instructions that, when individually or collectively executed by one or more processors of a wearable device, cause a wearable device including at least one first sensor and at least one second sensor to perform operations. The operations include: the wearable device identifying, using the at least one first sensor, whether a user wearing the wearable device has initiated exercise; the wearable device identifying, using the at least one second sensor, a point in time when the user begins to sweat based on the identification of the initiation of exercise; and the wearable device determining, based on the identified point in time when the user begins to sweat, an amount of sweat loss of the user.

[0010] According to various embodiments of the present disclosure, a wearable device and a control method thereof can be provided that can provide information on the amount of sweat loss to a user by taking into account the user's sweating characteristics, thereby providing the user with relatively accurate information on the amount of sweat loss.

[0011] Other aspects, advantages and important features of the present disclosure will become apparent to those skilled in the art from the following detailed description, which sets forth various embodiments of the present disclosure together with the accompanying drawings.

[0012] The above and other aspects, features and advantages of specific embodiments of the disclosure will become more apparent from the following description taken in conjunction with the accompanying drawings, in which:

[0013] FIG. 1 illustrates an electronic device (e.g., a wearable device) according to one embodiment of the present disclosure.

[0014] FIG. 2A is a front perspective view illustrating a wearable device according to one embodiment of the present disclosure.

[0015] FIG. 2b is a rear perspective view illustrating the wearable device of FIG. 2a according to one embodiment of the present disclosure.

[0016] FIG. 3 is an exploded perspective view illustrating the electronic device of FIG. 2a according to one embodiment of the present disclosure.

[0017] FIG. 4 illustrates a function or operation of a wearable device (100) according to one embodiment of the present disclosure to determine (e.g., estimate) the amount of sweat loss.

[0018] FIG. 5A illustrates a function or operation of a wearable device (100) according to one embodiment of the present disclosure to determine or estimate a sweating point based on a change in impedance.

[0019] FIG. 5b illustrates a function or operation of a wearable device (100) according to one embodiment of the present disclosure to determine or estimate a timing of a pulse based on a change in a phase value.

[0020] FIG. 6A illustrates how the amount of sweat loss changes based on the sweating characteristics of a user according to one embodiment of the present disclosure.

[0021] FIG. 6b illustrates how the amount of sweat loss changes based on the user's exercise intensity according to one embodiment of the present disclosure.

[0022] FIG. 7a illustrates a function or operation that estimates the amount of sweat loss and provides it to a user according to a related technology.

[0023] FIG. 7b illustrates a function or operation of estimating a sweat loss amount based on a user's sweating characteristics and providing the same to the user, according to one embodiment of the present disclosure.

[0024] Throughout the drawings, identical reference numbers are used to represent identical elements.

[0025] The following description, with reference to the accompanying drawings, is provided to facilitate a comprehensive understanding of various embodiments of the present invention as defined by the claims and their equivalents. While it includes numerous specific details to aid understanding, these should be considered illustrative only. Accordingly, those skilled in the art will recognize that various changes and modifications to the various embodiments described herein can be made without departing from the scope and spirit of the present invention. Furthermore, descriptions of well-known functions and configurations may be omitted for clarity and brevity.

[0026] The terms and words used in the following description and claims are not limited to their bibliographic meanings, but are used by the inventors to facilitate a clear and consistent understanding of the present invention. Therefore, it should be apparent to those skilled in the art that the following description of various embodiments of the present invention is provided for illustrative purposes only and is not intended to limit the present invention as defined by the appended claims and their equivalents.

[0027] It should be understood that the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "component surfaces" includes reference to one or more of these surfaces.

[0028] It should be understood that each block in each flowchart and the combination of flowcharts can be performed by one or more computer programs containing computer-executable instructions. The entirety of one or more computer programs may be stored in a single memory device, or the one or more computer programs may be divided into different parts stored in different memory devices.

[0029] The functions or operations described herein may be performed by a single processor or a combination of processors. A single processor or a combination of processors is a circuit that performs processing and includes an application processor (AP, e.g., a central processing unit (CPU)), a communication processor (CP, e.g., a modem), a graphics processing unit (GPU), a neural processing unit (NPU) (e.g., an artificial intelligence (AI) chip), a Wi-Fi chip, a Bluetooth™ chip, a global positioning system (GPS) chip, a near-field communication (NFC) chip, a connection chip, a sensor controller, a touch controller, a fingerprint sensor controller, a display driver integrated circuit (IC), an audio codec chip, a universal serial bus (USB) controller, a camera controller, an image processing IC, a microprocessor unit (MPU), a system on a chip (SoC), an IC, or similar circuits.

[0030] FIG. 1 illustrates an electronic device according to one embodiment of the present disclosure.

[0031] Referring to FIG. 1, a wearable device (100) according to one embodiment of the present disclosure may include a processor (110), a memory (120), a display module (130), a sensor module (140), a communication module (150), a power management module (160), and a battery (162).

[0032] According to one embodiment of the present disclosure, the processor (110) may, for example, execute software to control at least one other component (e.g., hardware or software component) of the wearable device (100) connected to the processor (110) and perform various data processing or calculations. According to one embodiment of the present disclosure, as at least a part of the data processing or calculations, the processor (110) may store commands or data received from other components (e.g., a sensor module (140) or a communication module (150)) in a volatile memory, process the commands or data stored in the volatile memory, and store result data in a memory (120) (e.g., a non-volatile memory). According to one embodiment of the present disclosure, the processor (110) may include a main processor (112) (e.g., a central processing unit or an application processor) or an auxiliary processor (114) (e.g., a graphics processing unit, a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor) that can operate independently or together therewith. For example, if a wearable device (100) includes a main processor (112) and a secondary processor (114), the secondary processor (114) may be configured to use less power than the main processor (112) or to be specialized for a given function. The secondary processor (114) may be implemented separately from the main processor (112) or as a part thereof.

[0033] The auxiliary processor (114) may control at least a portion of functions or states associated with at least one component (e.g., a display module (130), a sensor module (140), or a communication module (150)) of the wearable device (100), for example, on behalf of the main processor (112) while the main processor (112) is in an inactive (e.g., sleep) state, or together with the main processor (112) while the main processor (112) is in an active (e.g., application execution) state. According to one embodiment of the present disclosure, the auxiliary processor (114) (e.g., an image signal processor or a communication processor) may be implemented as a part of another functionally related component (e.g., a camera module or a communication module (150)). According to one embodiment of the present disclosure, the auxiliary processor (123) (e.g., a neural network processing unit) may include a hardware structure specialized for processing artificial intelligence models. The artificial intelligence models may be generated through machine learning. This learning can be performed, for example, on the wearable device (100) itself where the artificial intelligence model is executed, or can be performed via a separate server. The learning algorithm may include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but is not limited to the examples described above. The artificial intelligence model may include multiple artificial neural network layers.The artificial neural network may be one of a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), a deep Q-network, or a combination of two or more of the above, but is not limited to the examples described above. In addition to, or alternatively to, a hardware structure, an artificial intelligence model may include a software structure.

[0034] A memory (120) according to one embodiment of the present disclosure may store various data used by at least one component (e.g., a processor (110) or a sensor module (140)) of a wearable device (100). The data may include, for example, software (e.g., a program) and input data or output data for commands related thereto. The memory (120) may include volatile memory or non-volatile memory.

[0035] A display module (130) according to one embodiment of the present disclosure can visually provide information to an external party (e.g., a user) of a wearable device (100). The display module (130) may include, for example, a display, a holographic device, or a projector, and a control circuit for controlling the device. According to one embodiment, the display module (130) may include a touch sensor configured to detect a touch, or a pressure sensor configured to measure the intensity of a force generated by the touch.

[0036] A sensor module (140) according to one embodiment of the present disclosure can detect an operating state (e.g., power or temperature) of a wearable device (100) or an external environmental state (e.g., user state) and generate an electrical signal or data value corresponding to the detected state. According to one embodiment of the present disclosure, the sensor module (140) may include, for example, a gesture sensor, a gyro sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biometric sensor, a temperature sensor, a humidity sensor, a PPG (Photoplethysmography) sensor, or an illuminance sensor. The sensor module (140) according to one embodiment of the present disclosure may include a plurality of electrodes. The plurality of electrodes according to one embodiment of the present disclosure may be in contact with a user's skin while being worn by the user. The plurality of electrodes according to one embodiment of the present disclosure may be electrically connected to each other.

[0037] A communication module (150) according to one embodiment of the present disclosure may support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between a wearable device (100) and an external electronic device (e.g., a server), and the performance of communication through the established communication channel. The communication module (150) may operate independently from the processor (110) (e.g., an application processor) and may include one or more communication processors that support direct (e.g., wired) communication or wireless communication. According to one embodiment, the communication module (150) may include a wireless communication module (e.g., a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module (e.g., a local area network (LAN) communication module, or a power line communication module). A communication module according to one embodiment of the present disclosure can communicate with an external electronic device via a first network (e.g., a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)) or a second network (e.g., a long-range communication network such as a legacy cellular network, a fifth generation (5G) network, a next-generation communication network, the Internet, or a computer network (e.g., a local area network or a wide area network)). These various types of communication modules can be integrated into a single component (e.g., a single chip) or implemented as multiple separate components (e.g., multiple chips). The wireless communication module can identify or authenticate the wearable device (100) within a communication network such as the first network or the second network by using subscriber information (e.g., an international mobile subscriber identity (IMSI)) stored in a subscriber identification module.

[0038] The wireless communication module can support 5G networks and next-generation communication technologies following the 4th generation (4G) network, such as new radio access technology (NR). The NR access technology can support high-speed transmission of large amounts of data (eMBB (enhanced mobile broadband)), minimizing terminal power and connecting multiple terminals (mMTC (massive machine type communications)), or high reliability and low latency communications (URLLC (ultra-reliable and low-latency communications)). The wireless communication module (192) can support, for example, a high-frequency band (e.g., millimeter wave (mmWave) band) to achieve a high data transmission rate. The wireless communication module may support various technologies for securing performance in high frequency bands, such as beamforming, massive multiple-input and multiple-output (MIMO), full dimensional MIMO (FD-MIMO), array antennas, analog beam-forming, or large scale antennas. The wireless communication module may support various requirements specified in a wearable device (100), an external electronic device, or a network system (e.g., a second network). According to one embodiment of the present disclosure, the wireless communication module may support a peak data rate (e.g., 20 Gbps or more) for realizing eMBB, a loss coverage (e.g., 164 dB or less) for realizing mMTC, or a U-plane latency (e.g., 0.5 ms or less for downlink (DL) and uplink (UL), or 1 ms or less for round trip) for realizing URLLC.

[0039] A power management module (160) according to one embodiment of the present disclosure can manage power supplied to a wearable device (100). According to one embodiment of the present disclosure, the power management module (160) can be implemented, for example, as at least a part of a power management integrated circuit (PMIC).

[0040] A battery (162) according to one embodiment of the present disclosure can supply power to at least one component of a wearable device (100). According to one embodiment of the present disclosure, the battery (162) can include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0041] FIG. 2A is a front perspective view illustrating a wearable device according to an embodiment of the present disclosure. FIG. 2B is a rear perspective view illustrating the wearable device of FIG. 2A according to an embodiment of the present disclosure. The embodiments of FIGS. 2A and 2B may be optionally combined with the embodiment of FIG. 1 or the embodiments described below to implement additional embodiments.

[0042] Referring to FIGS. 2A and 2B , the wearable device (100) may include a housing (210) or a wearing member (250, 260). The housing (210) may include a first side (or front side) (210A), a second side (or back side) (210B), or a side surface (210C). The side surface (210C) may surround a space between the first side (210A) and the second side (210B). In one embodiment of the present disclosure, the wearing member (250, 260) may be connected to at least a portion of the housing (210) and configured to detachably attach the wearable device (100) to a part of the user's body (e.g., a wrist, an ankle, etc.). For example, the wearable device (100) may be in the form of a wristwatch.

[0043] According to one embodiment of the present disclosure, the housing (210) may refer to a structure forming a first surface (210A) of FIG. 2A, a second surface (210B) of FIG. 2B, and a portion of the side surfaces (210C). In one embodiment, the first surface (210A) may be formed by a front plate (201) that is at least partially transparent (e.g., a glass plate or a polymer plate including various coating layers). The second surface (210B) may be formed by a substantially opaque back plate (207). In one embodiment of the present disclosure, when the wearable device (100) includes a sensor module (211) disposed on the second surface (210B), the back plate (207) may include an at least partially transparent area. The rear plate (207) may be formed of, for example, coated or colored glass, ceramic, polymer, metal (e.g., aluminum, stainless steel (STS), or magnesium), or a combination of at least two of the foregoing materials. The side (210C) may be formed of a side bezel structure (or “side member”) (206) that is coupled to the front plate (201) and the rear plate (207) and comprises a metal and / or polymer. In one embodiment, the rear plate (207) and the side bezel structure (206) may be formed integrally and comprise the same material (e.g., a metal material such as aluminum). The wearing members (250, 260) may be formed of various materials and shapes. The integral and multiple unit links may be formed to be movable with each other by woven fabric, leather, rubber, urethane, metal, ceramic, or a combination of at least two of the foregoing materials.

[0044] According to one embodiment of the present disclosure, the wearable device (100) may include at least one of a display (e.g., the display (320) of FIG. 3), an audio module (205, 208), a sensor module (211) (e.g., the sensor module (140) of FIG. 1), a key input device (202, 203, 204), or a connector hole (209). In one embodiment, the wearable device (100) may omit at least one of the components (e.g., the key input device (202, 203, 204), the connector hole (209), or the sensor module (211)) or may additionally include other components.

[0045] According to one embodiment of the present disclosure, a display (e.g., display (320) of FIG. 3) may be visually exposed, for example, through a substantial portion of a front plate (201). The shape of the display may correspond to the shape of the front plate (201), and may have various shapes such as a circle, an oval, or a polygon. The display may be coupled to or disposed adjacent to a touch sensing circuit, a pressure sensor capable of measuring the intensity (pressure) of a touch, and / or a fingerprint sensor.

[0046] The audio module (205, 208) may include a microphone hole (205) and a speaker hole (208). The microphone hole (205) may have a microphone positioned therein for acquiring external sounds, and in one embodiment, multiple microphones may be positioned therein to detect the direction of the sounds. The speaker hole (208) may be used as an external speaker. In one embodiment of the present disclosure, a speaker may be included without a speaker hole (e.g., a piezo speaker).

[0047] The sensor module (211) can generate an electric signal or data value corresponding to the internal operating state of the wearable device (100) or the external environmental state. The sensor module (211) can include, for example, a biometric sensor module (211) (e.g., HRM sensor) arranged on the second surface (210B) of the housing (210). The wearable device (100) can further include at least one of a sensor module not shown, for example, a gesture sensor, a gyro sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a color sensor, an IR (infrared) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0048] The key input devices (202, 203, 204) may include a wheel key (202) disposed on a first side (210A) of the housing (210) and rotatable in at least one direction, and / or a side key button (203, 204) disposed on a side surface (210C) of the housing (210). The wheel key (202) may have a shape corresponding to the shape of the front plate (201). In one embodiment of the present disclosure, the wearable device (100) may not include some or all of the above-mentioned key input devices (202, 203, 204), and the key input devices (202, 203, 204) that are not included may be implemented in another form, such as a soft key, on the display. The connector hole (209) can accommodate a connector (e.g., a USB connector) for transmitting and receiving power and / or data with an external electronic device, and may include another connector hole (not shown) for receiving a connector for transmitting and receiving audio signals with an external electronic device. The wearable device (100) may further include, for example, a connector cover (not shown) that covers at least a portion of the connector hole (209) and blocks the inflow of external foreign substances into the connector hole.

[0049] The wearing member (250, 260) can be detachably fastened to at least a portion of the housing (210) using a locking member (251, 261). The locking member (251, 261) can include a fastening component such as a pogo pin, and can be replaced with a protrusion(s) or recess(es) formed in the wearing member (250, 260) according to an embodiment. For example, the wearing member (250, 260) can be coupled in a manner of engaging with a groove or a protrusion formed in the housing (210). The wearing member (250, 260) can include one or more of a fixing member (252), a fixing member fastening hole (253), a band guide member (254), and a band fixing ring (255).

[0050] The fixing member (252) may be configured to fix the housing (210) and the wearing member (250, 260) to a part of the user's body (e.g., wrist, ankle, etc.). The fixing member fastening hole (253) may correspond to the fixing member (252) to fix the housing (210) and the wearing member (250, 260) to a part of the user's body. The band guide member (254) may be configured to limit the range of movement of the fixing member (252) when the fixing member (252) is fastened to the fixing member fastening hole (253), thereby allowing the wearing member (250, 260) to be fastened in close contact with a part of the user's body. The band fixing ring (255) may limit the range of movement of the wearing member (250, 260) when the fixing member (252) and the fixing member fastening hole (253) are fastened.

[0051] FIG. 3 is an exploded perspective view illustrating the electronic device of FIG. 2A, according to one embodiment of the present disclosure. The embodiment of FIG. 3 may be optionally combined with the embodiments of FIGS. 1, 2A, and 2B, or with the embodiments described below, to implement additional embodiments.

[0052] Referring to FIG. 3, a wearable device (100) (e.g., the wearable device (100) of FIG. 1, or the wearable device (100) of FIGS. 2A to 2B) includes a side bezel structure (310) (e.g., the side bezel structure (206) of FIGS. 2A to 2B), a wheel key (330) (e.g., the wheel key (202) of FIGS. 2A to 2B), a front plate (301) (e.g., the front plate (201) of FIG. 2A), a display (320), a first antenna (350), a second antenna (e.g., an antenna included in a second circuit board (355)), a support member (360) (e.g., a bracket), a battery (370), a printed circuit board (380), a sealing member (390), a rear plate (392), and a wearing member (395, 397) (e.g., the wearing member of FIG. 2A or 2B). It may include an absence (250, 260). At least one of the components of the wearable device (100) may be identical or similar to at least one of the components of the wearable device (100) of FIG. 2a or FIG. 2b, and any overlapping description will be omitted below.

[0053] According to one embodiment of the present disclosure, the support member (360) may be disposed inside the wearable device (100) and connected to a side bezel structure (e.g., a side member) (310), or may be formed integrally with the side bezel structure (310). The support member (360) may be formed of, for example, a metallic material and / or a non-metallic (e.g., a polymer) material. The support member (360) may have a display (320) (e.g., a display module (130) of FIG. 1) coupled to one surface and a printed circuit board (380) coupled to the other surface. A processor, a memory, and / or an interface may be mounted on the printed circuit board (380).

[0054] A processor (e.g., processor (110) of FIG. 1) may include, for example, one or more of a central processing unit, an application processor, a GPU (graphic processing unit), an application processor sensor processor, or a communication processor.

[0055] The memory (e.g., memory (120) of FIG. 1) may include, for example, volatile memory or non-volatile memory.

[0056] The interface may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, and / or an audio interface. The interface may electrically or physically connect the wearable device (100) to an external electronic device, for example, and may include a USB connector, an SD card / MMC connector, or an audio connector.

[0057] According to one embodiment of the present disclosure, a battery (370) (e.g., battery (162) of FIG. 1) is a device for supplying power to at least one component of a wearable device (100), and may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell. At least a portion of the battery (370) may be disposed substantially on the same plane as, for example, a printed circuit board (380). The battery (370) may be disposed integrally within the wearable device (100), or may be disposed detachably from the wearable device (100).

[0058] According to one embodiment of the present disclosure, a first antenna (350) may be disposed between a display (320) and a support member (360). The first antenna (350) may include, for example, a near field communication (NFC) antenna, a wireless charging antenna, and / or a magnetic secure transmission (MST) antenna. The first antenna (350) may, for example, perform short-range communication with an external device, wirelessly transmit and receive power required for charging, and transmit a magnetic-based signal including a short-range communication signal or payment data. In one embodiment, the antenna structure may be formed by a portion or a combination of the side bezel structure (310) and / or the support member (360).

[0059] According to one embodiment of the present disclosure, a second circuit board (355) may be disposed between the circuit board (380) and the back plate (392). The second circuit board (355) may include an antenna (e.g., the antenna module (197) of FIG. 1), for example, a near field communication (NFC) antenna, a wireless charging antenna, and / or a magnetic secure transmission (MST) antenna. The second circuit board (355) may, for example, perform short-range communication with an external device, wirelessly transmit and receive power required for charging, and transmit a magnetic-based signal including a short-range communication signal or payment data. In one embodiment of the present disclosure, the antenna structure may be formed by a portion or a combination of the side bezel structure (310) and / or the back plate (392). In various embodiments, when the wearable device (100) (e.g., the wearable device (100) of FIGS. 2A and 2B) includes a sensor module (e.g., the sensor module (211) of FIG. 2B), a sensor circuit disposed on the second circuit board (355) or a sensor element (e.g., a photoelectric conversion element or an electrode pad) separate from the second circuit board (355) may be disposed. For example, an electronic component provided as a sensor module may be disposed between the circuit board (380) and the rear plate (392).

[0060] According to one embodiment of the present disclosure, a sealing member (390) may be positioned between the side bezel structure (310) and the front plate (301). The sealing member (390) may be configured to block or reduce moisture and foreign substances from entering the space surrounded by the side bezel structure (310) and the front plate (301) from the outside.

[0061] FIG. 4 illustrates a function or operation of a wearable device (100) according to one embodiment of the present disclosure to determine (e.g., estimate) the amount of sweat loss.

[0062] Referring to FIG. 4, a wearable device (100) according to an embodiment of the present disclosure may, in operation 410, identify whether a user wearing the wearable device (100) has started exercising by using at least one first sensor (e.g., a PPG sensor, a temperature sensor, and / or an acceleration sensor). The wearable device (100) according to an embodiment of the present disclosure may, for example, compare sensed data detected by an acceleration sensor with sample data to determine whether the user is currently exercising and / or performing any type of exercise. In addition to data detected by the acceleration sensor, the wearable device (100) according to an embodiment of the present disclosure may determine whether the user is currently exercising based on whether the user's heart rate is equal to or greater than a specified threshold value and / or is maintained equal to or greater than the threshold value for a specified period of time. According to one embodiment of the present disclosure, a wearable device (100) can determine that a user is currently exercising, even if the sensing data acquired by an acceleration sensor does not indicate the user's exercise, if, for example, the user's heart rate determined based on data detected by a PPG sensor remains above a specified threshold value for a specified period of time. According to one embodiment of the present disclosure, a wearable device (100) can determine that a user is currently exercising, even if the sensing data acquired by an acceleration sensor does not indicate the user's exercise, if, for example, the user's skin temperature determined based on data detected by a temperature sensor set to sense skin temperature remains above a specified threshold value for a specified period of time.

[0063] According to one embodiment of the present disclosure, the wearable device (100), in operation 420, if it is determined that the user has initiated exercise according to operation 410, may determine the time point of the user's sweating using at least one second sensor. According to one embodiment of the present disclosure, the second sensor (e.g., the sensor module (140) of FIG. 1 ) may include a plurality of electrodes (e.g., a first electrode (216a), a second electrode (216b), a third electrode (216c), and / or a fourth electrode (216d)). According to one embodiment of the present disclosure, the plurality of electrodes (e.g., the first electrode (216a), the second electrode (216b), the third electrode (216c), and / or the fourth electrode (216d)) may be electrically connected to each other. A processor (110) according to one embodiment of the present disclosure can control a wearable device (100) to apply current through a plurality of electrodes (e.g., a first electrode (216a), a second electrode (216b), a third electrode (216c), and / or a fourth electrode (216d)) in a state of contact with the skin.

[0064] FIG. 5A illustrates a function or operation of a wearable device (100) according to one embodiment of the present disclosure to determine or estimate a sweating point based on a change in impedance. FIG. 5B illustrates a function or operation of a wearable device (100) according to one embodiment of the present disclosure to determine or estimate a sweating point based on a change in a phase value.

[0065] Referring to FIG. 5A, a wearable device (100) according to an embodiment of the present disclosure can apply an alternating current based on a specified frequency (e.g., a frequency of 5 kHz) to a plurality of electrodes (e.g., a first electrode (216a), a second electrode (216b), a third electrode (216c), and / or a fourth electrode (216d)). The wearable device (100) according to an embodiment of the present disclosure can identify a point in time (e.g., a first point in time (510)) at which an impedance for the plurality of electrodes (e.g., the first electrode (216a), the second electrode (216b), the third electrode (216c), and / or the fourth electrode (216d)) drops. A wearable device (100) according to one embodiment of the present disclosure may determine or estimate a time point (e.g., a first time point (510)) at which impedance for a plurality of electrodes (e.g., a first electrode (216a), a second electrode (216b), a third electrode (216c), and / or a fourth electrode (216d)) drops as a time point. A wearable device (100) according to one embodiment of the present disclosure may also apply an alternating current based on a plurality of frequencies to a plurality of electrodes (e.g., a first electrode (216a), a second electrode (216b), a third electrode (216c), and / or a fourth electrode (216d)).

[0066] Referring to FIG. 5B, a wearable device (100) according to an embodiment of the present disclosure may apply an alternating current based on a specified frequency (e.g., a frequency of 5 kHz) to a plurality of electrodes (e.g., a first electrode (216a), a second electrode (216b), a third electrode (216c), and / or a fourth electrode (216d)). The wearable device (100) according to an embodiment of the present disclosure may identify a point in time (e.g., a second point in time (520)) at which a phase value (e.g., an angle) for the plurality of electrodes (e.g., the first electrode (216a), the second electrode (216b), the third electrode (216c), and / or the fourth electrode (216d)) changes. A wearable device (100) according to one embodiment of the present disclosure may determine or estimate a time point (e.g., a second time point (520)) at which a phase value for a plurality of electrodes (e.g., a first electrode (216a), a second electrode (216b), a third electrode (216c), and / or a fourth electrode (216d)) changes as a time point of occurrence. A wearable device (100) according to one embodiment of the present disclosure may also apply an alternating current based on a plurality of frequencies to a plurality of electrodes (e.g., a first electrode (216a), a second electrode (216b), a third electrode (216c), and / or a fourth electrode (216d)).

[0067] A wearable device (100) according to one embodiment of the present disclosure can identify both a time point (e.g., a first time point (510)) at which an impedance for a plurality of electrodes (e.g., a first electrode (216a), a second electrode (216b), a third electrode (216c), and / or a fourth electrode (216d)) drops and a time point (e.g., a second time point (520)) at which a phase value for a plurality of electrodes (e.g., a first electrode (216a), a second electrode (216b), a third electrode (216c), and / or a fourth electrode (216d)) changes, and if a time difference between the first time point (510) and the second time point (520) is within a specified error range, determine either the first time point (510) or the second time point (520) as the time point of emission. A wearable device (100) according to one embodiment of the present disclosure can identify both a point in time (e.g., a first point in time (510)) at which an impedance for a plurality of electrodes (e.g., a first electrode (216a), a second electrode (216b), a third electrode (216c), and / or a fourth electrode (216d)) drops and a point in time (e.g., a second point in time (520)) at which a phase value for a plurality of electrodes (e.g., a first electrode (216a), a second electrode (216b), a third electrode (216c), and / or a fourth electrode (216d)) changes, and determine the first point in time (510) as the time of occurrence when the time difference between the first point in time (510) and the second point in time (520) is outside a specified error range.Alternatively, the wearable device (100) according to one embodiment of the present disclosure may identify both a point in time (e.g., a first point in time (510)) at which an impedance for a plurality of electrodes (e.g., a first electrode (216a), a second electrode (216b), a third electrode (216c), and / or a fourth electrode (216d)) drops and a point in time (e.g., a second point in time (520)) at which a phase value for a plurality of electrodes (e.g., a first electrode (216a), a second electrode (216b), a third electrode (216c), and / or a fourth electrode (216d)) changes, and if the time difference between the first point in time (510) and the second point in time (520) is outside a specified error range, the first point in time (510) or the second point in time (520) may be determined as the time of occurrence according to a user's setting.

[0068] According to one embodiment of the present disclosure, the wearable device (100) may determine (e.g., estimate) the degree of sweat loss of the user based on the sweating point identified according to operation 420 in operation 430. According to one embodiment of the present disclosure, the wearable device (100) may determine the current exercise intensity of the user based on the data detected according to operation 410. For example, the wearable device (100) according to one embodiment of the present disclosure may determine the exercise intensity of the user based on a look-up table in which the relationship between the exercise intensity and the sensed data is defined. According to one embodiment of the present disclosure, for example, the wearable device (100) may determine the exercise intensity as “strong” when the user’s heart rate is 150 or higher. Alternatively, the wearable device may determine the exercise intensity as “medium” when the user’s heart rate has a value between 120 (e.g., 120 or higher) and 150 (e.g., less than 150). Alternatively, if the user's heart rate is between 100 and 120, the exercise intensity may be determined as "light." However, this classification is for illustrative purposes only, and various exercise intensities may be defined in the lookup table.

[0069] A wearable device (100) according to one embodiment of the present disclosure can select (e.g., determine) a sub-data set corresponding to the determined exercise intensity and basic information such as the user's gender, age, weight, and height from a sample data set.

[0070] FIG. 6A illustrates how sweat loss varies based on a user's sweating characteristics according to one embodiment of the present disclosure. FIG. 6B illustrates how sweat loss varies based on a user's exercise intensity according to one embodiment of the present disclosure.

[0071] Referring to FIGS. 6A and 6B , sample data (610, 620, 630, and 640) according to an embodiment of the present disclosure may include data in the form of a straight line having various slopes depending on the exercise progress time and the amount of sweat loss, for example, as shown in FIGS. 6A and 6B . The sample data according to an embodiment of the present disclosure may be classified according to exercise intensity and basic information of the user. The sample data according to an embodiment of the present disclosure may be stored in the wearable device (100) or may be stored in an external device (e.g., a server) operatively connected to the wearable device (100). The sample data according to an embodiment of the present disclosure may include data in the form of a straight line starting from various sweating points (e.g., a specific point on the x-axis), as shown in FIGS. 6A and 6B . For example, a specific straight line belonging to the sample data according to an embodiment of the present disclosure may include data in the form of a straight line starting from (20,0) rather than the origin. According to one embodiment of the present disclosure, sample data and / or sub-data sets may include linear data having different slopes depending on the user's sweating time, as illustrated in FIG. 6A . FIG. 6A illustrates a case where different users with different sweating characteristics have different sweat loss amounts. FIG. 6B illustrates a case where even the same user has different sweat loss amounts depending on exercise intensity.

[0072] The wearable device (200) according to one embodiment of the present disclosure may select at least one data (e.g., a straight line) corresponding to the time of sweating of the user from among the selected sub-data sets. The sub-data set according to one embodiment of the present disclosure may include data in the form of straight lines having different slopes depending on the time of sweating, as illustrated in FIGS. 6A and 6B . The wearable device (100) according to one embodiment of the present disclosure may select at least one data having a sweating time substantially corresponding to the time of sweating of the user as a coordinate value of the X-axis from among the sub-data sets (e.g., data having a sweating time included within a first specified error range). According to an embodiment of the present disclosure, if there is no at least one data substantially corresponding to the time of sweating of the user in the sub data set (e.g., data having a sweating time within a specified error range), the wearable device (100) may select a plurality of data having a sweating time similar to the time of sweating of the user (e.g., data having a sweating time within a second specified error range having a wider error range than the first specified error range). According to an embodiment of the present disclosure, the wearable device (100) may estimate the amount of sweat loss based on the selected at least one data and the user's exercise time. For example, according to an embodiment of the present disclosure, the wearable device (100) may provide the user with an average value of a plurality of data having a sweating time similar to the time of sweating of the user as a coordinate value of the X-axis (e.g., data having a sweating time within a second specified error range having a wider error range than the first specified error range) as information on the amount of sweat loss.According to one embodiment of the present disclosure, a wearable device (100) may provide feedback requesting water intake to the user through a display module (130) or another output device (e.g., a speaker) when the amount of sweat loss during the user's exercise exceeds a specified amount (e.g., 500 mL) or a specified percentage (e.g., 2% of the body weight). Alternatively, after the user's exercise ends, a wearable device (100) may provide feedback requesting water intake to the user through a display module (130) or another output device (e.g., a speaker). The amount of sweat loss according to one embodiment of the present disclosure may be determined based on factors included in the following mathematical equation 1.

[0073]

[0074] In mathematical expression 1, A(Ts) is a sweat loss characteristic coefficient, and may be a function having a characteristic that A(Ts) increases as Ts (e.g., the point of sweating) decreases. In mathematical expression 1, B may denote an activity intensity coefficient, and C may denote a correction coefficient based on the user's basic information. In mathematical expression 1, Te may denote the point in time when exercise ends. Electronic devices according to related technologies provide sweat loss information to the user without considering A(Ts) and (Te-Ts), thereby providing relatively inaccurate information. However, a wearable device (100) according to an embodiment of the present disclosure provides information on sweat loss to the user by considering both A(Ts) and (Te-Ts), thereby providing relatively accurate information on the amount of sweat loss to the user.

[0075] A wearable device (100) according to one embodiment of the present disclosure can estimate environmental information of a location where a user is currently located based on the user's sweating time and / or selected data. For example, a wearable device (100) according to one embodiment of the present disclosure can estimate environmental information of a location where a user is currently located by comparing the user's current sweating time with an average of the user's sweating time points over a specified past period. Alternatively, a wearable device (100) according to one embodiment of the present disclosure can estimate environmental information of a location where a user is currently located by comparing the user's current sweating time point with an average of other users' sweating time points over a specified past period. For example, if the average of the user's sweating time points over a month is identified as 5 minutes and the user's current sweating time point is identified as 2 minutes, a wearable device (100) according to one embodiment of the present disclosure can estimate that the user is currently in an environment with a high temperature. A wearable device (100) according to one embodiment of the present disclosure can determine whether the difference in sweating times exceeds a specified error range, for example, if the average sweating times of other users over a month is identified as 10 minutes and the current user's sweating times are identified as 2 minutes. If the difference in sweating times exceeds the specified error range, the wearable device (100) according to one embodiment of the present disclosure can estimate that the user is currently in an environment with a high temperature.

[0076] FIG. 7a illustrates a function or operation for estimating sweat loss and providing it to a user according to a related technology. FIG. 7b illustrates a function or operation for estimating sweat loss based on a user's sweating characteristics and providing it to a user according to one embodiment of the present disclosure.

[0077] Referring to FIG. 7A, an electronic device according to the related technology, as illustrated in FIG. 7A, does not take into account the user's sweat characteristics at all, and provides the user with information on the estimated sweat loss amount based on the average value of a plurality of data according to the user's basic information. For example, information on the sweat loss amount is provided to the user based on the first data (710). However, a wearable device (100) according to an embodiment of the present disclosure provides information on the sweat loss amount based on personalized data (e.g., second data (720)) among the sample data rather than the average value of the sample data, by considering the user's sweat characteristics (e.g., whether the user has a constitution that sweats a lot, a constitution that sweats quickly, or a constitution that sweats little) in addition to the user's basic information, thereby providing the user with information on the sweat loss amount that is relatively more accurate than the prior art. In FIGS. 7A and 7B, for convenience of explanation, multiple data having a specified slope are depicted as starting from the origin (e.g., (0,0)), but may start from various locations depending on the starting point.

[0078] A wearable device according to one embodiment of the present disclosure (e.g., the wearable device (100) of FIG. 1) may include at least one first sensor (e.g., the sensor module (140) of FIG. 1), at least one second sensor including a plurality of electrodes (e.g., the sensor module (140) of FIG. 1), and at least one processor (e.g., the processor (110) of FIG. 1) and a memory (memory (120) of FIG. 1) storing instructions. The instructions may be configured to cause the wearable device, when executed by the at least one processor, to identify whether a user wearing the wearable device has started exercising using the at least one first sensor, identify a time point of sweating of the user using the at least one second sensor when it is identified that the user has started exercising, and determine an extent of sweat loss of the user based on the identified time point of sweating.

[0079] A method for controlling a wearable device (e.g., a wearable device (100) of FIG. 1) according to one embodiment of the present disclosure may include an operation of identifying whether a user wearing the wearable device has started exercising using at least one first sensor (e.g., a sensor module (140) of FIG. 1); an operation of identifying a time point of sweating of the user using at least one second sensor (e.g., a sensor module (140) of FIG. 1) when it is identified that the user has started exercising; and an operation of determining a degree of sweat loss of the user based on the identified time point of sweating.

[0080] Electronic devices according to various embodiments disclosed in the present disclosure may take various forms. Electronic devices may include, for example, portable communication devices (e.g., smartphones), computer devices, portable multimedia devices, portable medical devices, cameras, wearable devices, or home appliances. Electronic devices according to embodiments of the present disclosure are not limited to the aforementioned devices.

[0081] The various embodiments of the present disclosure and the terminology used therein are not intended to limit the technical features described in the present disclosure to specific embodiments, but should be understood to include various modifications, equivalents, or substitutes of the embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. In the present disclosure, each of the phrases "A or B," "at least one of A and B," "at least one of A or B," "A, B, or C," "at least one of A, B, and C," and "at least one of A, B, or C" can include any one of the items listed together in the corresponding phrase among the phrases, or all possible combinations thereof. Terms such as "first," "second," or "first" or "second" may be used simply to distinguish the corresponding component from other corresponding components and do not limit the corresponding components in any other respect (e.g., importance or order). When a component (e.g., a first component) is referred to as being “coupled” or “connected” to another component (e.g., a second component), with or without the terms “functionally” or “communicatively,” it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through a third component.

[0082] The term "module" used in various embodiments of the present disclosure may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit, for example. A module may be an integrally formed component, or a minimum unit or part of such a component that performs one or more functions. For example, according to one embodiment of the present disclosure, a module may be implemented in the form of an application-specific integrated circuit (ASIC).

[0083] Various embodiments of the present disclosure may be implemented as software (e.g., a program (2540)) including one or more instructions stored in a storage medium (e.g., an internal memory (2536) or an external memory (2538)) readable by a machine (e.g., an electronic device (2501)). For example, a processor of the machine (e.g., the electronic device (2501)) may call at least one instruction among the one or more instructions stored from the storage medium and execute it. This enables the machine to operate to perform at least one function according to the at least one called instruction. The one or more instructions may include code generated by a compiler or code executable by an interpreter. The machine-readable storage medium may be provided in the form of a non-transitory storage medium. Here, "non-transitory" simply means that the storage medium is a tangible device and does not contain signals (e.g., electromagnetic waves), and the term does not distinguish between cases where data is stored semi-permanently or temporarily on the storage medium.

[0084] According to one embodiment of the present disclosure, the method according to various embodiments disclosed in the present disclosure may be provided as included in a computer program product. The computer program product may be traded as a commodity between a seller and a buyer. The computer program product may be distributed in the form of a machine-readable storage medium (e.g., compact disc read-only memory (CD-ROM)), or may be distributed online (e.g., downloaded or uploaded) via an application store (e.g., Play Store™) or directly between two user devices (e.g., smart phones). In the case of online distribution, at least a portion of the computer program product may be temporarily stored or temporarily generated in a machine-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or a relay server.

[0085] According to one embodiment of the present disclosure, each component (e.g., a module or a program) of the above-described components may include one or more entities, and some of the entities may be separately arranged in other components. According to one embodiment of the present disclosure, one or more components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (e.g., a module or a program) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to the integration. According to one embodiment of the present disclosure, operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

[0086] It will be appreciated that the various embodiments of the present disclosure, in accordance with the claims and description of the present disclosure, may be implemented in the form of hardware, software, or a combination of hardware and software.

[0087] Such software may be stored on a non-transitory computer-readable storage medium. The non-transitory computer-readable storage medium stores one or more computer programs (software modules), and the one or more computer programs include computer-executable instructions that, when executed by one or more processors of the electronic device, cause the electronic device to perform the methods of the present disclosure.

[0088] Such software may be stored in a volatile or non-volatile storage form, for example, a storage device such as a read-only memory (ROM), whether or not erasable or rewritable, or a memory form such as a random access memory (RAM), a memory chip, device or integrated circuit, or an optically or magnetically readable medium such as a compact disc (CD), a digital versatile disc (DVD), a magnetic disk or magnetic tape or the like. It will be appreciated that the storage devices and the storage media are various embodiments of non-transitory machine-readable storage suitable for storing a computer program or computer programs comprising instructions that, when executed, implement various embodiments of the present disclosure. Accordingly, various embodiments provide a program comprising code for implementing an apparatus or method as claimed in one of the claims of the present disclosure, and a non-transitory machine-readable storage storing such a program.

[0089] While the present disclosure has been shown and described with reference to various embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims and their equivalents.

Claims

1. In wearable devices, at least one first sensor, At least one second sensor comprising a plurality of electrodes; memory for storing one or more programs, and comprising at least one first sensor, at least one second sensor, and one or more processors connected to enable synchronization with the memory; The one or more computer programs comprise computer-executable instructions, which, when individually or collectively executed by the one or more processors, cause the wearable device to: Identifying whether a user wearing the wearable device has started exercising using at least one first sensor; If it is identified that the user has initiated exercise, the user's sweating point is identified using the at least one second sensor, and A wearable device characterized in that it is set to determine the degree of sweat loss of the user based on the identified sweating point.

2. In paragraph 1, The one or more computer programs further comprise computer-executable instructions, which, when individually or collectively executed by the one or more processors, cause the wearable device to: A wearable device characterized by including instructions set to determine the sweating point based on a change in impedance of the plurality of electrodes at a specified frequency.

3. In paragraph 2, The one or more computer programs further comprise computer-executable instructions, which, when individually or collectively executed by the one or more processors, cause the wearable device to: A wearable device characterized in that it includes instructions set to determine the timing of the emission based on a change in a phase value at the above-mentioned frequency.

4. In paragraph 1, The one or more computer programs further comprise computer-executable instructions, which, when individually or collectively executed by the one or more processors, cause the wearable device to: A wearable device characterized by including an instruction set to select at least one data corresponding to the sweating point from among a plurality of pre-stored data, and to determine the degree of sweat loss based on the selected data.

5. In paragraph 1, The wearable device further includes a display module, The one or more computer programs further comprise computer-executable instructions, which, when individually or collectively executed by the one or more processors, cause the wearable device to: A wearable device characterized in that it includes instructions set to provide a specified feedback through the display module when the degree of sweat loss is greater than a specified rate.

6. In paragraph 1, The one or more computer programs further comprise computer-executable instructions, which, when individually or collectively executed by the one or more processors, cause the wearable device to: A wearable device characterized by including instructions set to identify information about the surrounding environment in which the user is located based on the time of the sweating.

7. In paragraph 1, A wearable device, characterized in that the at least one first sensor comprises at least one sensor selected from the group consisting of an acceleration sensor, a PPG sensor, a temperature sensor, and a gyro sensor.

8. In paragraph 1, The one or more computer programs further comprise computer-executable instructions, which, when individually or collectively executed by the one or more processors, cause the wearable device to: A wearable device characterized in that it includes instructions set to identify the sweating characteristics of the user based on information about the time of sweating.

9. In paragraph 1, A wearable device, characterized in that the plurality of electrodes are electrically connected to each other.

10. In paragraph 2, A wearable device, characterized in that the above-mentioned specified frequency includes a frequency in the 5 kHz band.

11. A method performed by a wearable device, wherein the wearable device comprises at least one first sensor, at least one second sensor including a plurality of electrodes, An operation of identifying whether a user wearing the wearable device has started exercising using the at least one first sensor by the wearable device; When the user is identified as having initiated exercise, an operation of identifying the user's sweating point using the at least one second sensor by the wearable device, and A method for controlling a wearable device, characterized in that it includes an operation of determining the degree of sweat loss of the user by the wearable device based on the identified sweating point.

12. In paragraph 11, A method for controlling the wearable device, characterized in that the method further includes an operation of determining the sweating point based on a change in impedance of the plurality of electrodes at a specified frequency.

13. In paragraph 12, A method for controlling a wearable device, characterized in that the method further includes an operation of determining the timing of the sweating based on a change in a phase value at the specified frequency.

14. A non-transitory recording medium configured to store one or more computer programs, wherein the one or more computer programs include computer-executable instructions, which, when individually or collectively executed by one or more processors of the wearable device, cause the wearable device including at least one first sensor and at least one second sensor to perform operations, wherein the operations are: An operation of identifying whether a user wearing the wearable device has started exercising using at least one first sensor; When it is identified that the user has initiated exercise, an operation of identifying the time point of sweating of the user using the at least one second sensor, and A non-transitory recording medium characterized by including an action of determining the degree of sweat loss of the user based on the identified sweating point.

15. In paragraph 14, A non-transitory recording medium, characterized in that the above operations further include an operation of determining the timing of the sweating based on a change in impedance of a plurality of electrodes at a specified frequency.

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