Wearable device

Abstract

As a wearable device (100), the wearable device (100) comprises a wearable body; and at least one inductance sensor (120) including an inductance structure formed by surrounding a wire, wherein the at least one inductance sensor (120) is attached to a position corresponding to the joint position on the wearable body, and the inductance structure generates an inductance that changes according to the deformation of the joint position.

Description

Technology Field [Cross-reference] The present invention claims priority to a Chinese application filed on July 22, 2022, with application number 202210873140.4, the entire contents of said priority document incorporated into this specification by reference. [Technology Field] This specification relates to the field of wearable devices, and in particular, to wearable devices. Background Technology With the ceaseless advancement of the metaverse and VR technology, increasingly high demands are placed on the methods of interaction between the physical world of reality and the virtual world of the metaverse. As the most flexible and critical part of the human body, the real-time capture and virtual mapping of hand movements are an indispensable part of enhancing the realism and experience of the metaverse. However, current motion capture gloves have many problems. For example, motion capture gloves based on multi-axis inertial sensors have complex algorithms, cumbersome systems, poor wearing comfort, and relatively high costs. Furthermore, sensors in current motion capture gloves based on resistive or capacitive bending sensors lack consistency in reliability, are extremely susceptible to interference from various external factors such as temperature, sweat, and pressure, have very limited application scenarios, and are relatively expensive. The problem to be solved Therefore, it is necessary to design a motion capture glove that is simple to manufacture, inexpensive, comfortable to wear, has strong anti-interference capabilities, and combines high sensitivity and high reliability. means of solving the problem One of the embodiments of the present specification provides a wearable device, said wearable device comprising: a wearable body for covering a joint position of a user; and at least one inductance sensor, said at least one inductance sensor comprising an inductance structure formed by surrounding a wire, said at least one inductance sensor attached at a position corresponding to said joint position on said wearable body, said inductance structure generating an inductance that changes according to a deformation of said joint position. In some embodiments, the wearable body includes a glove, and when a user wears the wearable device, at least a portion of the at least one inductance sensor is positioned at a joint of the user's hand to collect motion signals of the user's hand. By sensing the movement of the user's hand using the inductance sensor, interference from external factors such as temperature, humidity, pressure, and sweat is not easily detected. In some embodiments, the wire surrounds the joint position and forms a spiral inductance pattern, and the thickness of the wire in a direction perpendicular to the surface of the inductance pattern is 3 mm or less. By setting the thickness of the wire in a direction perpendicular to the surface of the inductance pattern to within the above range, the user's comfort when wearing the wearable device can be improved and the sensitivity of the inductance sensor can be improved. In some embodiments, the angle of the bending axis of the joint corresponding to the major axis direction of the spiral inductance pattern is within the range of 90 degrees ± 20 degrees, and the angle of the bending axis of the joint corresponding to the minor axis direction of the spiral inductance pattern is within the range of ± 20 degrees. In some embodiments, the electrical resistance of the inductance structure is less than 100Ω, thereby improving the Q value of the inductance and further improving the precision of the measurement. In some embodiments, the at least one inductance sensor includes two inductance structures located on both the inner and outer sides of the joint, respectively. In some embodiments, the inductance structure includes a spiral inductance coil, wherein the number of turns of the wire in the spiral inductance coil is two or more. In some embodiments, the conductor comprises an elastically stretchable conductive spun yarn, and the conductive spun yarn is fixed through a weaving method. In some embodiments, the wire width of the wire in the spiral inductance coil is 2 mm or less, and the wire spacing is 2 mm or less. In some embodiments, the at least one inductance sensor further comprises a substrate for mounting the helical inductance coil, the substrate comprises a through hole, the through hole is used to lead the inner layer coil of the helical inductance coil to a first signal extraction terminal, the first signal extraction terminal and a second signal extraction terminal are located on the same surface of the substrate, and the second signal extraction terminal is connected to the outer layer coil of the helical inductance coil. In some embodiments, the at least one inductance sensor further comprises a substrate for mounting the helical inductance coil, wherein the helical inductance coil comprises at least a first layer coil and a second layer coil, wherein the first layer coil and the second layer coil are arranged in a divided layer in a direction perpendicular to the substrate, and the direction of current in the first layer coil and the second layer coil is the same. In some embodiments, the first layer coil and the second layer coil are each placed on both sides of the substrate. In some embodiments, a through hole is provided in the substrate, and the first layer coil and the second layer coil are each formed with the same strand of wire passing through the through hole. In some embodiments, the at least one inductance sensor is positioned on the back of the user's hand, and the at least one inductance sensor further comprises a magnetically conductive thin film, the magnetically conductive thin film covers one side of the helical inductance coil away from the user's hand. In some embodiments, the at least one inductance sensor is placed on the palm of a user, and the at least one inductance sensor further comprises a magnetically conductive thin film, the magnetically conductive thin film covers one side of the helical inductance coil that is close to the user's hand. In some embodiments, the thickness of the magnetically conductive thin film is 10 to 500 μm. In some embodiments, the at least one inductance sensor further includes a protective layer that packages the helical inductance coil. In some embodiments, the at least one inductance sensor comprises: a finger joint inductance sensor positioned on the back or ventral side of a finger joint to measure the flexion angle of the corresponding finger joint; a finger spacing inductance sensor positioned at the connection position of two adjacent fingers to measure the abduction angle of two adjacent fingers; or a wrist inductance sensor positioned on the back, front, or side of the wrist to measure the flexion angle of the wrist. In some embodiments, at least one of the finger joint inductance sensor and the wrist inductance sensor is symmetrical relative to the rotation axis of the corresponding joint. In some embodiments, the helical inductance coil of the finger joint inductance sensor has a size greater than 5 mm and less than 20 mm in a direction parallel to the rotation axis of the corresponding joint, and the ratio of the size in a direction perpendicular to the rotation axis of the corresponding joint to the size in a direction parallel to the rotation axis of the corresponding joint may be greater than 0.5 and less than 10. In some embodiments, at least one of the finger joint inductance sensor and the finger spacing inductance sensor comprises at least a first sub-inductance coil and a second sub-inductance coil, wherein the first sub-inductance coil and the second sub-inductance coil are connected in series through a lead wire, and wherein, when a user wears the wearable device, the direction of the current in the first sub-inductance coil and the second sub-inductance coil is the same. In some embodiments, the arrangement of the first sub-inductance coil and the second sub-inductance coil is the same. In some embodiments, the relative difference in size between the first sub-inductance coil and the second sub-inductance coil is less than 50%, and the first sub-inductance coil and the second sub-inductance coil are arranged symmetrically relative to the axis of rotation between the fingers. In some embodiments, the width of the area through which the lead wire passes is less than 2 mm, and the length of the lead wire is greater than 1 cm. In some embodiments, the wearable device further includes one or more reading units for reading an operation signal collected by the at least one inductance sensor, wherein each reading unit corresponds to at least one inductance sensor among the at least one inductance sensor. In some embodiments, the wearable device further includes a processor for processing an operation signal collected by at least one inductance sensor, wherein the processor is located on the back of the hand of the glove. In some embodiments, the wearable device further includes a vibration feedback unit for providing a virtual tactile sensation to the user's hand. In some embodiments, the wearable device further includes a positioning unit for determining a position with respect to the spatial coordinates of the wearable device. In some embodiments, the sensor is attached to the wearable body through a detachable method, and the size or shape of the inductance structure is adjustable. In the embodiments of this specification, by integrating an inductance sensor into a wearable structure, the accuracy of motion identification during the motion capture process is improved, wearing is comfortable, and the user experience is enhanced. Furthermore, the structure of the wearable device is simple, manufacturing costs are low, and reliability of use and recyclability are improved. Brief explanation of the drawing This specification is further described in the form of exemplary embodiments, which are described in detail through the drawings. These embodiments are not limiting, and in these embodiments, like reference numerals denote like structures. FIG. 1 is a structural block diagram of an exemplary wearable device according to the description of some embodiments of the present specification. FIG. 2a is a schematic diagram of an exemplary inductance sensor according to the description of some embodiments of the present specification. FIG. 2b is a schematic cross-sectional view of an exemplary wearable device according to the description of some embodiments of the present specification. FIG. 3a is a schematic diagram of an exemplary inductance sensor in its natural state and its equivalent area according to the description of some embodiments of the present specification. FIG. 3b is a schematic diagram of an inductance sensor in an exemplary bent state according to the description of some embodiments of the present specification. FIG. 3c is a schematic diagram of an exemplary inductance sensor in a bent state and its equivalent area according to the description of some embodiments of the present specification. FIG. 4a is a schematic cross-sectional view of an exemplary wearable device according to the description of some embodiments of the present specification. FIG. 4b is an overhead schematic diagram of the wearable device in FIG. 4a. FIG. 4c is a simplified schematic diagram of the wearable device in FIG. 4a. FIG. 5 is a schematic cross-sectional view of an exemplary wearable device according to the description of some embodiments of the present specification. FIG. 6a is a schematic diagram of the structure of an inductance sensor having an exemplary magnetically conductive thin film according to the description of some embodiments of the present specification. FIG. 6b is a schematic diagram of the structure of a simplified inductance sensor having an exemplary magnetically conductive thin film according to the description of some embodiments of the present specification. FIG. 6c is a schematic diagram of an exemplary normalized inductance change curve according to the description of some embodiments of this specification. FIG. 7a is a schematic diagram of an exemplary wearable device according to the description of some embodiments of the present specification. FIG. 7b is a schematic diagram of an exemplary finger-span inductance sensor according to the description of some embodiments of the present specification. FIG. 7c is a schematic diagram of the application corresponding to the finger spacing inductance sensor shown in FIG. 7b. FIG. 8 is a structural block diagram of an exemplary wearable device according to the description of some embodiments of the present specification. FIG. 9 is a schematic diagram of the structure of an exemplary reading unit according to the description of some embodiments of the present specification. FIG. 10 is a schematic diagram of the structure of an exemplary inductance sensor according to the description of some embodiments of the present specification. FIG. 11 is a schematic diagram of a user wearing an exemplary wearable device according to the description of some embodiments of the present specification. FIG. 12 is a schematic diagram of a curve in which the inductance value of an inductance structure having an exemplary spiral inductance pattern according to the description of some embodiments of the present specification changes according to the bending angle of the inductance structure in a non-wearing state. Specific details for implementing the invention To more clearly explain the technical solutions of the embodiments of the present invention, the drawings to be used in the description of the embodiments are briefly introduced below. Of course, the accompanying drawings in the description below are merely examples or embodiments of the present invention, and those skilled in the art can apply the present invention to other similar situations based on these drawings without creative labor. Unless readily available in the preceding or following text or described separately, the same reference numerals in the drawings indicate the same structure or operation. It must be understood that the terms "system," "device," "unit," and / or "module" used in this text are one way to distinguish different assemblies, components, parts, or assemblies at different levels. However, where other words can achieve the same purpose, they may be replaced with other expressions. As described in the invention and claims, unless otherwise clearly indicated by the context, words such as “one,” “one,” and / or “above” do not specifically refer only to the singular but may include the plural. Generally, the terms “include” and “comprehensively” mean merely including the specified procedures and elements, and such procedures and elements do not form an exclusive enumeration, and the method or apparatus may include other procedures or elements. The term “based on” means “based at least partially on”. The term “one embodiment” indicates “at least one embodiment,” and the term “another embodiment” indicates “at least one other embodiment.” In the description of this specification, it should be understood that terms such as "first," "second," "third," "fourth," etc. are for descriptive purposes only and should not be understood as indicating or implying that they are of relative importance or contain a quantity of the descriptive features indicated herein. Accordingly, the features defined by "first," "second," "third," and "fourth" specify or imply that they include at least one of the corresponding features. In the description of this specification, unless explicitly and specifically limited otherwise, the meaning of "plural" is to have at least two, for example, two, three, etc. In this specification, unless otherwise explicitly specified or limited, terms such as “connection,” “fixation,” etc., should be understood in a broad sense. For example, unless otherwise explicitly limited, the term “connection” may refer to a fixed connection, a detachable connection, or a monolithic molding; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium; it may be communication within two elements or an interaction relationship between two elements. Those skilled in the art can understand the specific meaning of the above terms in this specification based on the specific circumstances. An embodiment of the present invention provides a wearable device (which may also be referred to as a "wearable device"). The wearable device may include a glove and at least one inductance sensor fixed to the glove. When a user wears the wearable device, at least a portion of the inductance sensor may be positioned at a joint of the user's hand to collect motion signals of the user's hand. By measuring a change in the shape of the inductance sensor using a change in the inductance value of the inductance sensor, information on the movement of each finger and information on changes in the relative position between fingers can be captured in real time. The wearable device is not easily affected by interference from external factors such as temperature, humidity, pressure, and sweat, is simple to manufacture, is inexpensive to produce, is comfortable to wear, and possesses high sensitivity and high reliability. Below, the wearable device provided in the embodiment of the present specification is described in detail with reference to the drawings. FIG. 1 is a structural block diagram of an exemplary wearable device according to the description of some embodiments of the present specification. As shown in FIG. 1, the wearable device (100) may include a glove (110) and an inductance sensor (120). The glove (110) can serve as a carrier for the inductance sensor (120). In some embodiments, the glove (110) may be a finger-exposed glove or a full-finger glove. In some embodiments, the glove (110) may include at least one layer of fabric. For example, the glove (110) may include only a lining. The lining may be in direct contact with the skin of a person's hand, and the inductance sensor (120) may be placed on the surface of the lining (e.g., adhesive or seam). Also, for example, the glove (110) may include a lining and an outer layer or more layers of fabric. For example, the inductance sensor (120) may be placed between the lining and the outer layer of the glove (110) and completely enclosed by the lining and the outer layer of the glove (110). It should be noted that the lining fabric and / or outer layer fabric may be arranged according to actual needs (e.g., comfort, aesthetics), and are not limited thereto. The inductance sensor (120) may include a helical inductance coil (121) and a substrate (122). In some embodiments, the helical inductance coil (121) and the substrate (122) may also be deformed under the driving of deformation of the user's hand joint, and generate an electrical signal according to the deformation. An exemplary electrical signal may include inductance, circuit impedance, phase, resonant frequency, etc., or any combination thereof. For example, the inductance sensor (120) can determine the movement status of the hand joint corresponding to the inductance sensor (120) by measuring the shape change of the inductance sensor (120) (or helical inductance coil (121)) according to the movement of the human hand joint using a change in the inductance value of the helical inductance coil (121). For example, when a user wears the wearable device (100), at least a portion of the inductance sensor (120) is positioned at the joint portion of the user's hand, and by collecting the motion signal of the user's hand, the movement of the fingers of the hand can be determined. Specifically, when the hand joint of the user wearing the wearable device (100) performs a specific motion, a change in the shape of the inductance sensor (120) can occur, and thus the helical inductance coil (121) in the inductance sensor (120) changes the corresponding inductance value. Furthermore, through the change in the inductance value, information on the user's hand motion (e.g., the flexion angle of the joint, the flexion and extension status of the joint) can be obtained, thereby capturing the movement of the user's hand (or fingers). A substrate (122) may be used to mount a spiral inductance coil (121). In some embodiments, the material of the substrate (122) may include, but is not limited to, flexible organic thin film materials such as PI, PET, silicone, and rubber. In some embodiments, the substrate (122) may be a flexible circuit board (FPC). In some embodiments, the substrate (122) may be a direct woven fabric to improve comfort when the user wears the wearable device (100). The thickness of the substrate (122) must strike a balance between user comfort and practicality; if the substrate (122) is too thick, the user may not be sufficiently comfortable, and if the substrate (122) is too thin, it may cause wrinkles in the substrate, thereby affecting the accuracy of reading the inductance value. In some embodiments, the thickness of the substrate (122) may be 1 μm to 500 μm. In some embodiments, the helical inductance coil (121) may include a single-layer coil. In this case, the number of coil turns of the wire in the helical inductance coil (121) may be two or more. In some embodiments, to increase the total inductance value of the inductance sensor (120), the helical inductance coil (121) may include a multilayer coil with currents in the same direction. The multilayer coil with currents in the same direction may be arranged in a divided layer in a direction perpendicular to the substrate (122). Optionally, the projection of the multilayer coil in a direction perpendicular to the substrate (122) may be partially or completely overlapped. Additionally, by increasing the degree of overlap of the projection of the multilayer coil in a direction perpendicular to the substrate (122), the inductance value of the inductance sensor (120) can be made larger, and thus the reliability of the inductance sensor (120) can be improved. In some embodiments, the shape of the helical inductance coil (121) (i.e., the overall shape of the pattern formed by winding the wire (or referred to as the “inductance pattern”)) may be a regular geometric shape such as a rectangle, a circle, or an ellipse, or other irregular shapes. Preferably, the shape of the helical inductance coil (121) may be an axially symmetric geometric shape. In some embodiments, the material of the wire that is wound to produce a helical inductance coil (121) may be a metal / alloy, or a conductive material such as pulp, carbon pulp, ITO, liquid metal, etc. The direction in which the wire is wound helically may be clockwise or counterclockwise. For more description of the wearable device (100), refer to other parts of this specification, e.g., FIGS. 2a to 2b, FIGS. 4a to 4c, FIGS. 5, etc. and descriptions thereof. The wearable device (100) described in some embodiments of this specification senses the movement of a user's hand using an inductance sensor (120), thereby not easily being affected by interference from external factors such as temperature, humidity, pressure, and sweat. Additionally, the inductance sensor (120) can be manufactured by placing a spiral inductance coil (121) on a substrate (122), and the manufacturing process is simple, inexpensive, and applicable to industrial production. Alternatively, by increasing the number of coil turns of the spiral inductance coil (121), the inductance of the inductance sensor (120) (higher inductance can be achieved under a relatively small size) can be improved, thereby enhancing the sensitivity of the sensor, satisfying the demand for small-sized sensor applications, and simultaneously simplifying the design of a subsequent reading system. FIG. 2a is a schematic bird's-eye view of an exemplary inductance sensor according to the description of some embodiments of this specification. FIG. 2b is a schematic cross-sectional view of an exemplary wearable device according to the description of some embodiments of this specification. As shown in FIG. 2a, the wearable device (100) may include an inductance sensor (120). The inductance sensor (120) may include a spiral inductance coil (121) and a substrate (122). The spiral inductance coil (121) may be placed on the substrate (122) (e.g., adhesive or sealing). Both ends of a wire (which may also be called an “inductance wire”) made of a spiral inductance coil (121) that is wound may be connected to an external circuit (e.g., a reading unit) through signal extraction terminals (123) (e.g., a first signal extraction terminal (1231) and a second signal extraction terminal (1232)). In some embodiments, through holes (1221 and 1222) are provided in the substrate (122) so that both ends of the inductance wire can be drawn out from the same side of the substrate (122) to facilitate circuit connection. For example, as shown in FIGS. 2a and 2b, the first signal extraction terminal (1231) and the second signal extraction terminal (1232) may be located simultaneously on the upper side of the substrate (122). The outer terminal of the spiral inductance coil (121) may be drawn out directly to the second signal extraction terminal (1232) located on the upper side of the substrate (122). The inner terminal of the spiral inductance coil (121) is drawn out to the lower side of the substrate (122) through the through hole (1221), then drawn out to the upper side of the substrate (122) through the through hole (1222), and drawn out to the first signal output terminal (1231), and further, the two ends of the inductance wire can be drawn out from the first signal output terminal (1231) and the second signal output terminal (1232), respectively. In some embodiments, as shown in FIG. 2b, the thickness h of the inductance wire may be within the range of 0.1 μm to 100 μm. In some embodiments, the width w of the inductance wire may be 2 mm or less. The spacing d of the inductance wire may be 2 mm or less. Additionally, the ratio w / d of the width w of the inductance wire and the spacing d of the inductance wire may be within the range of 0.5 to 5, thereby improving the space utilization of the inductance sensor (120) and, furthermore, obtaining better sensitivity and inductance values ​​by winding more coils. In this specification, the thickness h of the inductance wire may be the size of the inductance wire in the vertical direction perpendicular to the substrate (122). The width w of the inductance wire may be the thickness size of the inductance wire in the plane of the substrate (122). The spacing d of the inductance wires may be the spacing between two adjacent inductance wires in the plane of the substrate (122). In some embodiments, as shown in FIG. 2b, the wearable device (100) may further include a fabric layer (111), a fabric layer (112), and a protective layer (124). The protective layer (124) may be placed in close contact with the outside of the spiral inductance coil (121) and / or the substrate (122). The fabric layer (111) and the fabric layer (112) may be placed on the upper and lower sides, respectively, of the inductance sensor (120). The fabric layer (111) and the fabric layer (112) belong to a part of the glove (110) of the wearable device (100). The protective layer (124) is used to protect the inductance sensor (i.e., the spiral inductance coil (121) and the substrate (122)) and acts as a waterproof protection, thereby preventing the inductance sensor from being oxidized, corroded, or worn out. In some embodiments, the materials that can be used for the protective layer (124) include, but are not limited to, materials with stable properties such as PI resin, epoxy resin, conformal coating, and silicone. FIG. 3a is a schematic diagram of an exemplary inductance sensor in a natural state and its equivalent area according to the description of some embodiments of this specification. FIG. 3b is a schematic diagram of an exemplary inductance sensor in a bent state according to the description of some embodiments of this specification. FIG. 3c is a schematic diagram of an exemplary inductance sensor in a bent state and its equivalent area according to the description of some embodiments of this specification. As shown in FIG. 3a, when the inductance sensor (120) is in a natural state, the area enclosed by the circuit of the spiral inductance coil (121) within the inductance sensor (120) (also referred to as the “equivalent area”) is maximized, and at this time, the equivalent area may be SO. When the inductance sensor (120) is placed on a joint (e.g., a finger joint), the shape of the inductance sensor (120) (or spiral inductance coil (121)) changes according to the bending of the joint, and furthermore, changes the equivalent area of ​​the spiral inductance coil (121). As shown in FIG. 3b, as the degree of bending of the inductance sensor (120) increases, the equivalent area of ​​the spiral inductance coil (121) gradually decreases. According to electromagnetic theory, for the same inductance coil, the area enclosed by the inductance and the current circuit is directly proportional. Therefore, the magnitude of the inductance value of the inductance sensor (120) decreases approximately linearly with the decrease in the equivalent area of ​​the spiral inductance coil (121), and can be expressed by the following formula (1). , (1) Here, ΔL indicates the amount of change in the inductance value of the inductance sensor (120), L0 indicates the initial inductance value of the inductance sensor (120), ΔS indicates the amount of change in the equivalent area of ​​the helical inductance coil (121), and SO indicates the initial equivalent area of ​​the helical inductance coil (121). In some embodiments, the relationship between the magnitude of the change in inductance value and the change in bending angle is not strictly linear and can be adjusted through methods such as algorithms, empirical mapping relationships, and machine learning. The relationship between the inductance value and the equivalent area described above is related to the shape size of the inductance sensor (120). In some embodiments, to obtain optimal sensitivity, when a user wears the wearable device (100), the inductance sensor (120) may be positioned symmetrically (or fundamentally symmetrically) relative to the rotation axis of the corresponding joint. That is, the inductance sensor (120) may be symmetrically (or fundamentally symmetrically) relative to the rotation axis of the corresponding joint. In some embodiments, for different joints, the inductance sensor (120) may have different sizes. In some embodiments, the size (also called the “width of the inductance sensor (120)”) in the direction parallel to the axis of rotation of the corresponding joint of the inductance sensor (120) (direction Z shown in FIG. 3a) may be greater than 1 mm and less than 20 mm, and the ratio of the size (also called the “length of the inductance sensor (120)”) in the direction perpendicular to the axis of rotation of the corresponding joint of the inductance sensor (120) (direction X shown in FIG. 3a) to the width of the inductance sensor (120) may be greater than 0.5 and less than 20. In some embodiments, the shape of the helical inductance coil (121) among the inductance sensors (120) (e.g., the finger joint inductance sensor (721) and finger spacing inductance sensor (722) shown in FIG. 7) may be a strip shape (e.g., a rectangle or a rounded rectangle) as shown in FIG. 3a. Under conditions where the length and number of coil turns of the inductance sensor (120) are constant, the closer the aspect ratio of the strip-shaped helical inductance coil is to 1:1, the higher its sensitivity may be. Since the shape and width of a human hand are limited, the length and width of the strip-shaped helical inductance coil are constrained by the shape of the position where the coil is located. For example, when the inductance sensor (120) is a finger joint inductance sensor, in order to further improve the sensitivity of the inductance sensor (120), the width a of the strip-shaped spiral inductance coil in the finger joint inductance sensor may be greater than 5 mm and less than 20 mm, and the aspect ratio b / a of the strip-shaped spiral inductance coil (121) in the finger joint inductance sensor may be greater than 0.5 and less than 10.When the inductance sensor (120) is a finger-span inductance sensor, since the inductance sensor (120) is placed between two fingers, its bending angle is larger and its sensitivity is higher compared to other inductance sensors, and the size limit may be moderately loose. In this case, the width a of the strip-shaped spiral inductance coil in the finger-span inductance sensor may be greater than 1 mm and less than 20 mm, and the aspect ratio b / a of the strip-shaped spiral inductance coil (121) in the finger-span inductance sensor may be greater than 0.5 and less than 20. The wearable device described in some embodiments of the present invention can obtain better sensor sensitivity by setting the position (relative position relative to the finger joint of a human hand), shape, and size of the finger joint inductance sensor. FIG. 4a is a schematic cross-sectional view of an exemplary wearable device according to the description of some embodiments of the present specification. FIG. 4b is a schematic bird's-eye view of the wearable device of FIG. 4a. FIG. 4c is a simplified schematic bird's-eye view of the wearable device of FIG. 4a. As shown in FIG. 4a, in some embodiments, the glove (110) of the wearable device (100) comprises a fabric layer (111) and a fabric layer (112). The inductance sensor (120) of the wearable device (100) may comprise a spiral inductance coil (121), a substrate (122), a signal extraction terminal (123), and a protective layer (124). In some embodiments, to increase the total inductance of the inductance sensor (120) and further increase the sensitivity of the inductance sensor (120), the spiral inductance coil (121) may comprise a multilayer coil. For example, as shown in FIG. 4a, the spiral inductance coil (121) may comprise at least a first layer coil (1211) and a second layer coil (1212). Also, for example, the spiral inductance coil (121) may include a 3-layer inductance coil, a 4-layer inductance coil, or more layers of inductance coil. For example, in the case where the spiral inductance coil (121) includes a first layer coil (1211) and a second layer coil (1212), the current in the first layer coil (1211) and the second layer coil (1212) has the same direction of current. Optionally, projections in a direction perpendicular to the substrate (122) of the area enclosed by the multilayer coil may partially overlap or completely overlap. In some embodiments, projections in a direction perpendicular to the substrate (122) of the area enclosed by the multilayer coil may not overlap. If the inductance currents of the first layer coil (1211) and the second layer coil (1212) flow in opposite directions, the inductance of the first layer coil (1211) and the inductance of the second layer coil (1212) may cancel each other out, and thus the total inductance value of the inductance sensor (120) may be reduced. When the inductance currents of the first layer coil (1211) and the second layer coil (1212) flow in the same direction, the total inductance L of the inductance sensor (120) can be secured as the sum of the inductance L1 of the first layer coil (1211), the inductance L2 of the second layer coil (1212), and the mutual inductance value M of the first layer coil (1211) and the second layer coil (1212), and is expressed by the following formula (2). L=L1+L2+2M (2) In some embodiments, to simplify the structure of the inductance sensor (120) and reduce the number of output terminals of the inductance sensor (120) to save costs, the first layer coil (1211) and the second layer coil (1212) may each be placed on both sides of the substrate. For example, as shown in FIG. 4a, a through hole (1221) is provided in the substrate (122), and the first layer coil (1211) may be connected to the second layer coil (1212) through the through hole (1221). That is, the first layer coil (1211) and the second layer coil (1212) may each be formed by winding the same wire that passes through the through hole (1221). For example, as shown in FIG. 4b, the first layer coil (1211) on the upper side of the substrate (122) can be wound from the outside inward and then drawn out to the lower side of the substrate (122) through the through hole (1221), and the second layer coil (1212) on the lower side of the substrate (122) can be wound from the inside outward and later the direction of current of the first layer coil (1211) and the second layer coil (1212) can be made to be the same direction (e.g., clockwise or counterclockwise). In some embodiments, the first layer coil (1211) and the second layer coil (1212) are each formed by winding a single strand of wire. The direction of current in the two strands of wire that are wound to form the first layer coil (1211) and the second layer coil (1212) is the same direction (e.g., clockwise or counterclockwise). For example, the through hole (1221) shown in FIG. 4a may not be provided in the substrate (122). Four lead tips may be provided in the substrate (122). The coil on each side may correspond to two lead tips. The first layer coil (1211) on the upper side of the substrate (122) starts from one lead tip corresponding thereto and is wound from the outside to the inside, and the inside may pass through the coil of each wheel to reach another lead tip corresponding to the first layer coil (1211). The second layer coil (1212) on the lower side of the substrate (122) also starts from a corresponding lead tip and is wound from the outside to the inside, and the inside passes through the coil of each wheel and reaches another lead tip corresponding to the second layer coil (1222). Alternatively, the second layer coil (1212) on the lower side of the substrate (122) may also start from a corresponding lead tip and be drawn out to the inside of the second layer coil (1212), then be wound from the inside to the outside and reach another lead tip corresponding to the second layer coil (1212). In some embodiments, signals at both ends of the same strand of wire that is wound to form the first layer coil (1211) and the second layer coil (1212) can be drawn out from both sides of the substrate (122). In some embodiments, to flexibly position the output terminal of the inductance sensor (120), a through hole (1222) is further provided in the substrate (122), and through the through hole (1222), signals at both ends of the inductance wire (the same strand of wire that is wound to form the first layer coil (1211) and the second layer coil (1212)) can be drawn out from the same side of the substrate (122). The inductance sensor (120) described in some embodiments of the present invention can increase the total inductance of the inductance sensor (120) by placing two layers or multiple layers of inductance on both the upper and lower sides of the substrate (122), thereby being advantageous for the stability and precision of a subsequent reading system, while also improving the sensitivity of the inductance sensor (120) and making the implementation of the process easy. FIG. 5 is a schematic cross-sectional view of an exemplary wearable device according to the description of some embodiments of the present specification. In some embodiments, as shown in FIG. 5, the wearable device (100) may further include a magnetically conductive thin film (125). The magnetically conductive thin film (125) may be a thin film having high permeability. By placing the magnetically conductive thin film (125) (e.g., a ceramic piece) on the surface or inside the inductance sensor (120), the magnetic flux within the inductance sensor (120) can be increased, further increasing the inductance of the inductance sensor (120) and improving the sensitivity of the inductance sensor (120). In some embodiments, the magnetically conductive film (125) may be manufactured by mixing a soft magnetic powder with silicon or a resin. The soft magnetic powder includes, but is not limited to, iron-silicon-aluminum powder, ferrite powder, etc. In some embodiments, the magnetically conductive film (125) may have a relative permeability of 10 or more. If the magnetically conductive film (125) is too thin, the effect of increasing the magnetic flux within the inductance sensor (120) is relatively weak, and furthermore, the sensitivity of the inductance sensor (120) cannot be improved well. If the magnetically conductive film (125) is too thick, not only does it increase the thickness and weight of the wearable device (100), but it can also cause cracks in the magnetically conductive film during the user's hand movements and shorten the lifespan of the wearable device (100). Therefore, in some embodiments, in order to balance the magnetic conduction effect of the magnetically conductive film, the user's comfort, and the lifespan of the wearable device (100), the thickness of the magnetically conductive film (125) is set to 10 μm to 500 μm. In some embodiments, the magnetically conductive film (125) may be adhered to the surface or interior of the inductance sensor (120) using a gel, or coated on the surface or interior of the inductance sensor (120) by means of a coating. For example, the magnetically conductive film (125) may be placed (e.g., adhered) on the surface of the inductance sensor (120) to increase the effective permeability μ of the environment space in which the inductance sensor (120) is situated. When the inductance sensor (120) is bent, the effective permeability μ may change according to the bending of the inductance sensor (120). The placement location of the magnetically conductive film (125) on the inductance sensor (120) may differ, and the effect on the inductance of the inductance sensor (120) may not be the same. FIG. 6a is a schematic diagram of the structure of an inductance sensor having an exemplary magnetically conductive thin film according to the description of some embodiments of this specification. FIG. 6b is a schematic diagram of the structure of a simplified inductance sensor having an exemplary magnetically conductive thin film according to the description of some embodiments of this specification. In the present specification, when the inductance sensor (120) is bent downward, for example, when the magnetically conductive film (125) is placed above the spiral inductance coil (121) (for example, as shown in FIG. 6A, the magnetically conductive film (125) is placed on the surface of the spiral inductance coil (121) above the substrate (122), after the spiral inductance coil (121) is bent downward, the first connecting line in the left-right direction (i.e., the dotted line in FIG. 6A) between the corresponding wires on the left and right sides of the spiral inductance coil (121) does not pass through the magnetically conductive film (125), and as the bending angle is larger, the first connecting line is further from the magnetically conductive film (125), thereby reducing the effective permeability and further reducing the inductance of the spiral inductance coil (121). Change in inductance due to the magnetic conductive film (125) A change in inductance due to the reduction in the equivalent area of ​​the plane enclosed by the current circuit of the helical inductance coil (121). (Figs. 3a and 3c) are superimposed so that the total change amount of the inductance of the inductance sensor (120) You can obtain . At this time, the total change in inductance It can be expressed by the formula below (3). (3) Change in inductance due to the magnetic conductive film (125) A change in inductance due to a decrease in the equivalent area of ​​the plane enclosed by the current circuit of the spiral inductance coil (121). (Figs. 3a and 3c) are offset, thereby the total changing inductance of the inductance sensor (120) As the bending angle increases, it first increases and then decreases. At this time, the total change in inductance It can be expressed by the following formula (4). (4) FIG. 6c is a schematic diagram of an exemplary normalized inductance change curve according to the description of some embodiments of this specification. As shown in FIG. 6c, curves 610, 620, and 630 each represent curves according to the change in bending angle of the inductance sensor (120) for normalized inductance when the magnetically conductive film (125) is placed above the helical inductance coil (121), when the magnetically conductive film (125) is not present, and when the magnetically conductive film (125) is placed below the helical inductance coil (121). From FIG. 6c, in the case where the magnetically conductive film (125) (corresponding curve 620) is absent or the magnetically conductive film (125) is placed below the helical inductance coil (121) (corresponding curve 630), the case where the magnetically conductive film (125) is placed above the helical inductance coil (121) (corresponding curve 610) not only increases the sensitivity of the inductance sensor (120) to the bending direction of the hand (e.g., finger), but also allows the inductance sensor (120) to have a certain directional selectivity. For example, when a user wears a wearable device including an inductance sensor shown in FIG. 6a, if the downward bending of the hand is called forward bending, then the total decrease in inductance of the inductance sensor is as shown in Formula (3), and when the hand bends in the opposite direction with a small width, the total increase in inductance of the inductance sensor is as shown in Formula (4). Since the total amount of inductance is different for forward bending and opposite bending, therefore, the inductance sensor (120) has a certain directional selectivity. In some embodiments, the inductance sensor (120) may be placed on one side of the user's palm, and to improve the sensitivity of the inductance sensor (120), the magnetically conductive film (125) may cover the side of the spiral inductance coil (121) closer to the user's hand. In some embodiments, to improve the user's wearing comfort, the inductance sensor (120) may be placed on the back of the user's hand. Since the fingers of the human body generally bend toward the palm when moving, to improve the sensitivity of the inductance sensor (120), the magnetically conductive film (125) may cover the side of the spiral inductance coil (121) further away from the user's hand. In some embodiments, the side of the spiral inductance coil (121) further away from the user's hand covered by the magnetically conductive film (125) may be the upward-facing side shown in FIG. 5. For example, the spiral inductance coil (121) may be on the upper surface of the substrate (122), and the magnetically conductive film (125) may be directly attached to the upper surface of the upper protective layer. For example, the spiral inductance coil (121) may be on the lower surface of the substrate (122), and the magnetically conductive film (125) may be directly attached to the upper surface of the substrate (122). For example, the spiral inductance coil (121) may be on the upper surface of the substrate (122), and the magnetically conductive film (125) may be directly attached to the upper surface of the spiral inductance coil (121), that is, the magnetically conductive film (125) may be placed between the spiral inductance coil (121) and the upper protective layer. For example, a spiral inductance coil (121) may be on the upper surface of the substrate (122), and a magnetically conductive thin film (125) may directly replace the upper protective layer, in which case the magnetically conductive thin film (125) may not only perform magnetic conduction but also perform a protective function. In some embodiments, the helical inductance coil (121) covered with a magnetically conductive thin film (125) may be a helical inductance coil comprising a single-layer coil disposed on one side of the substrate (122), a helical inductance coil comprising two-layer coils disposed on both sides of the substrate (122), or a helical inductance coil comprising two or more layers of coils.

[0052] A wearable device (100) described in some embodiments of the present invention can improve the absolute value of the inductance of an inductance sensor (120) by placing a magnetically conductive thin film (125) on the upper or lower side of a substrate (122), thereby making the inductance sensor (120) more sensitive and simultaneously restricting the distribution of magnetic field lines of the inductance sensor (120), thus blocking environmental interference such as external metals and improving the stability of the inductance sensor (120), and additionally, the bending sensitivity of the inductance sensor (120) can obtain directional selectivity. FIG. 7a is a schematic diagram of an exemplary wearable device according to the description of some embodiments of the present specification. As shown in FIG. 7a, the wearable device (700) may include different inductance sensors for different joints of the hand. For example, the inductance sensors in the wearable device (700) may include a finger joint inductance sensor (721), a finger spacing inductance sensor (722), and a wrist inductance sensor (7213). The finger joint inductance sensor (721) is positioned on the back and / or back of the finger joint to measure the flexion angle of the corresponding finger joint. The finger spacing inductance sensor (722) is positioned at the connection point of two adjacent fingers to measure the spread angle of two adjacent fingers. The wrist inductance sensor (7213) is positioned on the back, front, or side of the wrist to measure the angle of wrist flexion. Each inductance sensor can be connected to a reading unit via a wire (or lead wire) to facilitate reading the signal from the inductance sensor and subsequent processing. For a more detailed explanation of the reading unit and signal processing, refer to Fig. 8 or Fig. 9 and the description thereof. In some embodiments, there may be differences between the finger joint inductance sensor (721), the finger spacing inductance sensor (722), and the wrist inductance sensor (7213) included in the inductance sensor of the wearable device (700). In addition, regarding only the finger joint inductance sensor (721), there may also be differences between the finger joint inductance sensor (721) placed in the metacarpophalangeal joint and the interphalangeal joint (including the proximal interphalangeal joint and the distal interphalangeal joint). Specific differences may include one or more of the following: differences in size, thickness, bendable angle, sensitivity, etc. of the inductance sensor. For example, the length of the finger joint inductance sensor (721) placed in the metacarpophalangeal joint is relatively large, and if the length is too small, it is insufficient to cover the curved surface when bent, resulting in a significant decrease in sensitivity. For example, compared to the finger joint inductance sensor placed at the metacarpophalangeal joint or the distal interphalangeal joint, the area that the finger joint inductance sensor placed at the proximal interphalangeal joint must cover when flexed is relatively small, so the area of ​​the finger joint inductance sensor at the proximal interphalangeal joint does not have to be too large, and the length does not have to be too large. If the length is too long, the gap between it and the finger joint inductance sensors placed at the distal interphalangeal joint and the metacarpophalangeal joint becomes too small, and under the constraint of a limited finger length, it may not be possible to place a sufficient number of finger joint inductance sensors. Compared to the finger joint inductance sensor (721) and the wrist inductance sensor (7213), the bending angle of the finger spacing inductance sensor (722) is larger. Therefore, the finger spacing inductance sensor (722) must be thinner and more flexible, for example, with a thickness of 2 μm to 20 μm, allowing it to bend relatively naturally, thereby preventing thermal insulation of the finger spacing inductance sensor (722) and discomfort between human fingers. Additionally, the finger spacing inductance sensor (722) requires higher sensitivity, and this sensitivity may be non-linear (specifically refer to FIG. 10 and its description) and increases with increasing bending angle of the finger spacing inductance sensor (722). For a description of the finger spacing inductance sensor, refer to FIG. 7b and FIG. 7c, which are not duplicated here. When viewed from the angle of the process, the substrate thickness of the inductance sensor can be reduced to enable a thinner and more flexible inductance sensor, for example, the substrate thickness of the finger-span inductance sensor (722) can be set to 100 μm or less (e.g., 10 μm, 30 μm, 50 μm, 80 μm, etc.). In some embodiments, the finger joint inductance sensor (721) and the wrist inductance sensor (7213) may be thinner. If the finger joint inductance sensor (721) and the wrist inductance sensor (7213) are too thin, when the back of the human hand is spread, wrinkles may form on the finger joint inductance sensor (721) and / or the wrist inductance sensor (7213), and furthermore, may affect the alignment of the finger joint inductance sensor (721) and / or the wrist inductance sensor (7213). For example, the substrate thickness of the finger joint inductance sensor (721) and the wrist inductance sensor (7213) may be set to 200 μm (e.g., 250 μm, 300 μm, 350 μm, 400 μm, etc.). In some embodiments, the inductance sensors in the wearable device (700) may include only the partial inductance sensors shown in FIG. 7a, depending on actual acceptance (e.g., cost reduction). For example, the finger joint inductance sensors (721) may include only the finger joint inductance sensors placed at the metacarpophalangeal joint and the proximal interphalangeal joint. Additionally, based on the operation signals of the finger joint inductance sensors placed at the metacarpophalangeal joint and the proximal interphalangeal joint, the operation signal of the distal interphalangeal joint can be determined through mapping estimation. A wearable device described in some embodiments of the present invention places inductance sensors at different locations on a person's hand, each having different sizes, thicknesses, bendable angles, and inductances, thereby better measuring the movements of the person's hand and having better sensitivity. FIG. 7b is a schematic diagram of an exemplary finger-distance inductance sensor according to the description of some embodiments of the present specification. FIG. 7c is a schematic diagram of an application corresponding to the finger-distance inductance sensor shown in FIG. 7b. In some embodiments, because the angle between adjacent fingers is very small, the placement of the finger spacing inductance sensor may inevitably cause discomfort during wear. Therefore, the finger spacing inductance sensor (722) can be divided into two sub-inductance coils (L1 and L2), and the two sub-inductance coils (L1 and L2) can be connected in series with a lead wire to improve comfort during wear. As shown in FIGS. 7b and 7c, the finger-span inductance sensor (722) may include a first sub-inductance coil (7221) and a second sub-inductance coil (7222) connected in series via a lead wire (7223). When a user wears the wearable device, the direction of the current in the first sub-inductance coil (7221) and the second sub-inductance coil (7222) is the same (e.g., both clockwise or both counter-clockwise). When the inductance currents of the first sub-inductance coil (7221) and the second sub-inductance coil (7222) flow in the same direction, the total inductance L of the finger-span inductance sensor (722) is secured to be the sum of the inductance L71 of the first sub-inductance coil (7221), the inductance L72 of the second sub-inductance coil (7222), and the mutual inductance value M of the first sub-inductance coil (7221) and the second sub-inductance coil (7222), and can be expressed by formula (5). L=L71+L72+2M (5) M changes according to the change in finger angle (finger spacing), and the larger the finger angle (finger spacing), the larger the absolute value of M, thus causing a change in total inductance and further implementing the measurement of the finger angle (or finger spacing). In some embodiments, to increase the total inductance of the finger-spacing inductance sensor (722), the first sub-inductance coil (7221) and / or the second sub-inductance coil (7222) may include a multilayer coil. In some embodiments, the shapes of the first sub-inductance coil (7221) and the second sub-inductance coil (7222) may be circular, rectangular, square, regular polygonal, etc. In some embodiments, the arrangement (including shape, material, size, etc.) of the first sub-inductance coil (7221) and the second sub-inductance coil (7222) may be the same or different. For example, the shape and material of the first sub-inductance coil (7221) and the second sub-inductance coil (7222) may be the same, and the size of the first sub-inductance coil (7221) and the second sub-inductance coil (7222) (for example, a size that is parallel to the finger or perpendicular to the direction of the finger) may be different. Preferably, the shape and material of the first sub-inductance coil (7221) and the second sub-inductance coil (7222) may be the same, and the size of the first sub-inductance coil (7221) and the second sub-inductance coil (7222) may be the same. In some embodiments, where they must differ due to a difference in finger size, the relative difference in size between the first sub-inductance coil (7221) and the second sub-inductance coil (7222) (including the size in a direction parallel to or perpendicular to the finger) must be less than 50%. In this case, to ensure that the finger-span inductance sensor has relatively high sensitivity, the first sub-inductance coil (7221) and the second sub-inductance coil (7222) may be positioned symmetrically relative to the apex of the finger-span angle (which may also be called the "finger-span axis of rotation"). It should be noted that the apex of the inter-finger angle can be within a certain range of the inter-finger connection position and is not limited to a single specific point. In some embodiments, to reduce interference with finger movements and simultaneously improve the user's wearing comfort, the width of the area through which the lead wire (7223) passes may be less than 2 mm. Preferably, the width of the area through which the lead wire (7223) passes may be less than 1 mm. The lead wire length is determined by the finger size (including different finger sizes of different users and different finger sizes of the same user). In some embodiments, the length of the lead wire (7223) may be greater than 1 cm. In some embodiments, the lead wire (7223) may be any suitable lead wire, such as a straight line, an arc, a broken line, a wavy line, or a curve. In some embodiments, the position of the lead wire (7223) may be the lower edge of the inductance coil shown in FIG. 7b or FIG. 7c. In some embodiments, the position of the lead wire (7223) may be the upper edge, middle, or other position of the inductance coil. It should be noted that the aforementioned separate inductance sensor may also be applied to a finger joint inductance sensor (721). For example, the finger joint inductance sensor (721) may include two inductance coils and an inductance coil connected in series via lead wires. The two inductance coils may be placed on both sides of the corresponding finger joint. The mutual inductance value between the fingers of the two inductance coils changes according to the change in the finger bending angle, thereby causing a change in total inductance and further enabling the measurement of the finger bending angle. A wearable device described in some embodiments of the present invention can improve the user's comfort during use by dividing an inductance sensor placed between the user's finger joints or adjacent fingers into two sub-inductance coils connected in series via lead wires, and can reduce interference with finger activity and improve the user's wearing comfort at the same time by using relatively thin lead wires and setting a suitable width of the area through which the lead wires pass. FIG. 8 is a structural block diagram of an exemplary wearable device according to the description of some embodiments of the present specification. FIG. 9 is a structural schematic diagram of an exemplary reading unit according to the description of some embodiments of the present specification. As shown in FIG. 8, the wearable device (800) may include a wearable body (810), an inductance sensor (820), a reading unit (830), and a processor (840). In some embodiments, the wearable device (800) may be worn directly on the body, suspended, placed, or integrated into the user's clothing or a portable device in the absence of the user. The wearable body (810) may be an assembly that covers a specific part of the user (e.g., joint location, organ location, etc.). For example, the wearable body (810) may be a glove (e.g., glove (110)) that is in close contact with the user's body, athletic wear, athletic pants, knee pads, wrist pads, elbow pads, arm sleeves, etc. The present specification describes the wearable body (810) covering the user's joint location as an example. It is understood that the wearable body (810) may cover any location that can be used to capture user movements. In some embodiments, the user's joint location may be a hand joint (e.g., finger joint, wrist joint, etc.), shoulder joint, elbow joint, acetabular joint, knee joint, ankle joint, etc. As merely an example, the user's joint location is a joint of the user's hand. In some embodiments, the wearable body (810) may be used to mount other assemblies of the wearable device (800). For example, the wearable body (810) may be equipped with an inductance sensor (collectively referred to as "sensor") (820), a reading unit (which may also be called a "reading system") (830), and a processor (which may also be called a "processing circuit") (840). In some embodiments, the wearable body (810) may be composed of a flexible, body-hugging fabric so as to be in close contact with the user's joints. Exemplary fabrics may include silk, cotton, linen, synthetic materials, etc. In some embodiments, the wearable body (810) may undergo deformation corresponding to changes in human movement. For example, when the user squats, the wearable body (810) (e.g., the knee of athletic pants) may undergo deformation in which it expands and flexes along the outer side of the knee joint and contracts and flexes along the inner side of the knee joint in accordance with the user's knee movement. The inductance sensor (820) may be an assembly capable of detecting deformation of a specific part of the user and converting the deformation into an electrical signal. In some embodiments, the inductance sensor (820) may be attached to a position corresponding to a joint position on the wearable body (810). For example, the inductance sensor (820) may be attached to the inner and / or outer side of the wearable body (810) where the user's fingers, wrist, knee, shoulder, elbow, etc. come into contact. In some embodiments, the inductance sensor (820) may be fixed to a position corresponding to a joint position on the wearable body (810) by means of stitching, weaving, compression, adhesive, buckle type, etc. In some embodiments, the inductance sensor (820) may include an inductance structure formed by surrounding a conductor (referred to as “conductor”) (e.g., including a helical inductance coil (121) and a substrate (122)). In some embodiments, the inductance structure may be deformed according to a deformation of a specific part of the user (e.g., joint position), and an electrical signal may be generated based on the deformation. An exemplary electrical signal may include an inductance, circuit impedance, phase, resonant frequency, etc., or any combination thereof. For other specific descriptions of the inductance structure, reference may be made to other parts of this specification, e.g., FIGS. 2a to 2b, FIGS. 4a to 4c, FIGS. 5, etc. and descriptions thereof. The reading unit (830) may be an assembly for outputting an electrical signal detected by the sensor. The reading unit (830) may be used to read the operation signal collected by the inductance sensor (820) and to transmit the read operation signal to the processor (840) (e.g., via a transmission unit) for analysis and processing. The processor (840) may be used to analyze and process changes in the operation signal collected by the inductance sensor (820) and to convert the operation signal collected by the inductance sensor (820) into information such as the posture / angle of a joint (e.g., a finger). In some embodiments, depending on the type of different electrical signal generated by the inductance sensor (820), the reading unit (830) may include any device or combination such as an inductance meter, a voltammeter, an oscillometer, a multimeter, etc. In some embodiments, the reading unit (830) may be connected to the inductance structure of the inductance sensor (820) via a reading lead. In some embodiments, when the wearable body (810) is a glove, the reading unit (830) and the processor (840) may be located on the back of the glove for user comfort. In some embodiments, when the wearable device (800) includes multiple inductance sensors simultaneously, the reading unit (830) may be provided with one or multiple reading units. Each reading unit may read data from at least one inductance sensor. For example, each reading unit may read data from one inductance sensor. Also, for example, one reading unit may read data from multiple inductance sensors simultaneously. In some embodiments, the reading unit (830) can read the inductance data of the inductance sensor (820) using an impedance measurement method. Specifically, the reading unit (830) can measure the circuit using an LCR bridge circuit or impedance and directly measure the impedance value or inductance value of the inductance sensor (820). When the reading unit (830) acquires the inductance data of the inductance sensor (820) using an impedance measurement circuit, it can measure the corresponding impedance change through an impedance analyzer and further estimate the inductance value of the inductance sensor (820), and the measurement may not be affected by parasitic capacitance.

[0082] In some embodiments, the reading unit (830) can read the inductance data of the inductance sensor (820) using a resonance measurement method. The resonance measurement method is a type of indirect measurement method in which a capacitor is connected in parallel to the inductance sensor (820) to form an LC resonance system, an excitation signal is sent to the LC resonance system, and the inductance value of the inductance sensor (820) can be estimated by measuring the resonance frequency of the LC resonance system. In some embodiments, the excitation signal and the resonance frequency of the LC resonance system are the same or are fundamentally the same. As the excitation signal and the resonance frequency of the LC resonance system approach each other, it becomes easier to read the value of the resonance frequency. For example, when the resonance frequency of the LC resonance system is 100 kHz and a single 10 MHz excitation signal is sent, the difference between the resonance frequency and the frequency of the excitation signal is too large (for example, greater than 10 times), so the amplitude of the LC resonance system's vibration becomes too small, and the resonance frequency of the LC resonance system may not be measured stably and accurately. In some embodiments, to improve the anti-interference capability by reducing the effect of parasitic capacitance on the resonant frequency of the LC resonant system, the capacitor connected in parallel to the inductance sensor (820) may be a fixed-value large-capacitance capacitor (e.g., greater than 50 pF). As merely an example, as shown in FIG. 9, the reading unit (830) may include a reading chip (e.g., an FDC2214 chip) and a capacitor C0. The reading chip can send an excitation signal to the LC resonant system, read the resonant frequency of the LC resonant system, and further estimate the inductance value of the inductance sensor (820). The capacitor C0 is a fixed-value large-capacitance capacitor with an electrical capacitance value of C0 connected in parallel with the inductance sensor (820). At this time, the resonant frequency of the LC resonant system fo It can be expressed by the following formula (6). (6) Here, Ls is the inductance of the inductance sensor (820), and Cs is the capacitor of the inductance sensor (820). It should be noted that in the resonance measurement method, to improve the stability and precision of the results, the parallel-connected capacitance value and the Q value of the LC resonance system (determined by the reading chip) must be considered. The parallel-connected capacitance value and the Q value of the LC resonance system are inversely proportional. The larger the parallel-connected capacitance value, the smaller the interference from external capacitors received by the LC resonance system (e.g., parasitic capacitance generated by a human hand touching the inductance sensor), and the higher the reliability of the inductance sensor. However, at the same time, the smaller the Q value, the lower the accuracy of the measured resonance frequency. In some embodiments, the parallel-connected capacitance value may be within the range of 100 pF to 10 nF, and the corresponding Q value of the LC resonance system may be within the range of 2 to 100. A wearable device described in some embodiments of the present invention connects a fixed-value large-capacity capacitor in parallel to an inductance sensor (820) and measures the resonance frequency of an LC resonance system through a resonance measurement method, thereby reducing the influence of parasitic capacitance on the resonance frequency of the inductance sensor (820) and thus improving the interference prevention capability. Additionally, by considering the parallel-connected electrical capacitance value and the Q value of the LC resonance system, the wearable device combines the interference prevention capability of the wearable device with the accuracy of the resonance frequency measurement. In some embodiments, a processor (840) may be used to receive and process parameters that can represent the inductance value or other changes in inductance measured by the reading unit (830). For example, the processor (840) may be an assembly that converts the electrical signal generated by the inductance sensor (820) into parameters that reflect joint movement. In some embodiments, parameters that reflect joint movement may include the flexion angle of the joint, the flexion and extension status of the joint, etc. The flexion angle of a joint in this specification may be a narrow angle formed by the skin surfaces on both sides of the joint during the process of joint deformation. In some embodiments, there is a correspondence between the electrical signal generated by the inductance sensor (820) and the joint motion information, and the processor (840) can determine what motion has occurred at the corresponding joint position based on the change in the electrical signal generated by the inductance sensor (820). For a specific description of the correspondence between the electrical signal generated by the sensor and the joint motion information, refer to FIG. 12 and the related description. In some embodiments, the processor (840) may be connected to a terminal device. For example, the processor (840) may be connected to a terminal device via a network, a data cable (data interface), etc. The processor (840) may process the electrical signal generated by the inductance sensor (820) (e.g., inductance value, circuit impedance, etc.) to generate parameters reflecting joint motion and send them to the terminal device. Here, the terminal device may be a mobile phone, a computer, or other smart device. In some embodiments, the wearable device (800) may further include a vibration feedback unit (not shown). The vibration feedback unit may be used to provide a virtual tactile sensation to the user's hand. For example, the vibration feedback unit may receive a processing result from the processor (840) and provide a tactile sensation (e.g., vibration, extrusion, etc.) to the user's hand based on the processing result. In some embodiments, the vibration feedback unit may be a vibration motor. In some embodiments, the wearable device (800) may further include a positioning unit (not shown). The positioning unit may be used to facilitate access to virtual space by determining the position of the spatial coordinates (e.g., position, angle of inclination) of the entire wearable device (800) (e.g., glove). In some embodiments, the positioning unit may include a multi-axis inertial sensor, a magnetic sensor, etc. An exemplary multi-axis inertial sensor may include a 3-axis accelerometer, a 3-axis gyroscope, a 3-axis magnetic sensor, etc. A wearable device (800) described in some embodiments of the present invention implements interaction feedback between a person in the metaverse and a virtual world by using a vibration feedback unit and a positioning unit. It should be understood that the description of FIGS. 8 and 9 is provided for illustrative purposes only and is not intended to limit the scope of the invention. A person skilled in the art may make various changes and modifications in accordance with the teachings of the invention. For example, in some embodiments, the wearable device (800) may further include a power module which can be used to provide the wearable device (800) with the voltage required for operation. Also, for example, the wearable device (800) may further include a wireless transmission unit. Through the wireless transmission unit, the wearable device (800) and an external device (e.g., a computer, a mobile phone, an AR / VR host machine, or smart glasses) perform data interaction. In some embodiments, the wireless transmission unit may include Bluetooth communication, or other wireless communication methods such as Wi-Fi or 5G. Such changes and modifications do not depart from the scope of the invention. The wearable device (800) described in some embodiments of the present invention can convert the joint movements of a user into changing electrical signals and further generate parameters that reflect the joint movements, thereby accurately capturing the user's movements. Additionally, the inductance sensor (820) is integrated directly into the wearable body (810), making the wearable device (800) comfortable, breathable, and having low manufacturing costs. Furthermore, the inductance sensor (820), configured with an inductance structure, responds only to changes in shape, thereby preventing interference from other factors such as temperature, pressure, and sweating during the movement capture process, and improving the accuracy and reliability of movement capture and the reusability of the wearable device (100). FIG. 10 is a schematic diagram of the structure of an exemplary inductance sensor according to the description of some embodiments of the present specification. As shown in FIG. 10, the inductance sensor (820) may include an inductance structure formed by surrounding a conductor (1210) and a first reading lead (1225) and a second reading lead (1227). In some embodiments, the inductance sensor (820) may be fixed to a wearable body (810) by means of a method such as stitching, weaving, pressing, adhesive, or buckling. In some embodiments, the material of the wire (1210) may be such that the wire (1210) undergoes elastic or plastic deformation under the action of a relatively small stress, thereby ensuring that the wire (1210) undergoes corresponding deformation in accordance with joint movement. An exemplary material of the wire (1210) may include silver, copper, aluminum, alloy materials, composite materials, or any combination thereof. In some embodiments, the wire (1210) may comprise an elastically stretchable conductive spun yarn, which is secured by a weaving method. For example, the conductive spun yarn may be woven directly at the joint location of the wearer body (e.g., finger joint). In some embodiments, the conductive spun yarn may be woven on the inner and / or outer side of the joint location of the wearer body. By securing the elastically stretchable conductive spun yarn through weaving, the foreign body sensation when the user wears it can be reduced, the user experience can be improved, and at the same time, the degree of secure fixation can be improved and the sensor can be prevented from falling off. It is understood that the inductance sensor (820) may be secured to the wearer body by other methods such as stitching, compression, adhesive, buckling, etc., and the present specification is not limited thereto. In some embodiments, at least one layer of insulating material may be wrapped around the surface of the conductor (1210) to prevent external short circuits of the conductor (1210) and to protect the conductor (1210) at the same time. Exemplary insulating materials may include materials such as polyvinyl chloride, cross-linked polyethylene, ethylene-propylene rubber, silicone rubber, fluoroplastic, insulating cloth, insulating colloid, etc. The insulating material may wrap around the conductor (1210) through adhesion, coating, or other methods. In some embodiments, the conductor (1210) may surround the joint position and form a spiral inductance pattern. In some embodiments, the inductance pattern may be a planar spiral inductance pattern. For example, the shape of the inductance pattern may include, but is not limited to, planar shapes such as square, rectangular, circular, polygonal, semicircular, circular, and elliptical. The direction of the spiral wrapping may be clockwise or counterclockwise. In some embodiments, the inductance of the inductance structure can be calculated using the following formula (7). (7), Here, L is the inductance, and ε is magnetic flux, μ is permeability, N is the number of coil turns (turns), and S is the effective area through which magnetic field lines pass in the inductance pattern, lε is the length of the coil. From the above formula, it can be seen that when the joint is extended, the inductance pattern is in a fully unfolded state (i.e., the inductance pattern is flattened against the wearable body), at which time the effective area S is at its maximum and the corresponding inductance L is also at its maximum; and when the joint is flexed, the inductance pattern is in a flexed state (i.e., partial deformation occurs in the inductance pattern), at which time the effective area S decreases and the corresponding inductance L also decreases. In some embodiments, when the inductance pattern is in a flexed state, situations such as partial overlap, wrinkles, or protrusions may occur in the inductance pattern, so the change in the effective area is non-linear, and also, a non-linear change in the effective area may occur if the wearable body does not fit the user's body. Therefore, when the user's joint undergoes flexion deformation, the inductance exhibits a non-linear change according to the change in the effective area S. In some embodiments, the spiral inductance pattern has a number of turns greater than 1. For example, the number of turns of the spiral inductance pattern may be 2 turns, 5 turns, 10 turns, 50 turns, etc. Preferably, the number of turns of the spiral inductance pattern is greater than 2 turns. In some embodiments, the spiral inductance pattern may include a major axis and a minor axis. In the above specification, in a symmetric spiral inductance pattern, the major axis may be the longest axis of symmetry in the axis of symmetry of the spiral inductance pattern, and in an asymmetric spiral inductance pattern, the major axis may be a connecting line between two points having the maximum distance from the outside of the spiral inductance pattern. In a symmetric spiral inductance pattern, the minor axis may be the shortest axis of symmetry in the axis of symmetry of the spiral inductance pattern, and in an asymmetric spiral inductance pattern, the minor axis may be a connecting line between two points having the minimum distance from the outside of the spiral inductance pattern. In some embodiments, the major axis direction may be perpendicular to the minor axis direction. In some embodiments, the major axis direction and the minor axis direction of the spiral rectangular inductance pattern in the inductance sensor (820) may be as shown in FIG. 10. In some embodiments, the angle between the major axis direction of the spiral inductance pattern and the flexion axis of the joint is within the range of 90 degrees ± 20 degrees, and the angle between the minor axis direction and the flexion axis of the joint is within the range of ± 20 degrees. For example, the angle between the major axis direction of the spiral inductance pattern and the flexion axis of the joint is within the range of 80 degrees to 100 degrees, and the angle between the minor axis direction and the flexion axis of the joint is within the range of ± 10 degrees. For example, the angle between the major axis direction of the spiral inductance pattern and the flexion axis of the joint is within the range of 85 degrees to 95 degrees, and the angle between the minor axis direction and the flexion axis of the joint is within the range of ± 5 degrees. For example, the major axis direction of the spiral inductance pattern is perpendicular to the flexion axis of the joint, and the minor axis direction is parallel to the flexion axis of the joint. In some embodiments, the flexion axis of the joint may be a straight line where all fixed points are located during the process of deforming the finger joint. In some embodiments, to optimize the sensitivity of the inductance sensor (820), the shape of the spiral inductance pattern may be designed to be symmetric along the major or minor axis. For example, the spiral inductance pattern may be a rectangle, a circle, an ellipse, etc., with the major and minor axes as axes of symmetry. In some embodiments, the greater the thickness of the conductive spun yarn in the direction perpendicular to the surface of the inductance pattern, the more intense the foreign sensation generated when the user wears it; a relatively large thickness increases the stress required for the conductive spun yarn to deform, and when the joint performs a movement with a relatively small width, the conductive spun yarn is difficult to generate a corresponding deformation. To improve the comfort of the user wearing the wearable device (800) and to improve the sensitivity of the inductance sensor (820), the thickness of the conductive spun yarn in the direction perpendicular to the surface of the inductance pattern may be 3 mm or less. For example, the thickness of the conductive spun yarn in the direction perpendicular to the surface of the inductance pattern may be 2.5 mm, 2 mm, 1.5 mm, 1 mm, etc. Preferably, the thickness of the conductive spun yarn in the direction perpendicular to the surface of the inductance pattern is 2 mm. In some embodiments, reading lead lines are placed on the inner and outer rings of the spiral inductance pattern, respectively, and can be used to connect the inductance structure and the reading unit (830). The reading unit (830) can measure the inductance value or calculate other parameters (e.g., circuit impedance, phase, resonant frequency, etc.) that can indicate a change in inductance. In some embodiments, as shown in FIG. 10, the inner ring of the spiral inductance pattern may be the part connected to the second reading lead line (1227) in the wire. The outer ring of the spiral inductance pattern may be the part connected to the first reading lead line (1225) in the wire. A reading lead line may be a part of a wire (e.g., a portion of the end point of the wire). As shown in FIG. 10, the reading lead line may include a first reading lead line (1225) and a second reading lead line (1227). In some embodiments, the reading lead line may be connected to a reading unit (830). For example, the reading lead line may be connected to the reading unit (830) via a data interface. In some embodiments, to improve the Q value of the inductance and further improve the precision of the measurement, the electrical resistance of the inductance structure may be less than 100Ω. For example, the electrical resistance of the inductance structure may be less than 80Ω. For example, the electrical resistance of the inductance structure may be less than 50Ω. For example, the electrical resistance of the inductance structure may be less than 30Ω. For example, the electrical resistance of the inductance structure may be less than 10Ω. FIG. 11 is a schematic diagram of a user wearing an exemplary wearable device according to the description of some embodiments of the present specification. As shown in FIG. 11, an inductance sensor (820) in the wearable device may be attached to a position corresponding to the shoulder joint (310), elbow joint (320), and knee joint (330) on the wearable body. In some embodiments, the inductance sensor (820) may be attached to the wearable body (810) via a detachable method. For example, the inductance sensor (820) may be attached to the wearable body (810) via adhesive, binding, buckle, Velcro, or other methods. In some embodiments, the size or shape of the inductance structure is adjustable. For example, all movable positions of the joint can be covered by adaptively adjusting based on the size of the inductance structure and the size of the user's joint position, such as arm width, shoulder width, and knee width. In some embodiments, the size of the inductance structure is slightly smaller than the size of the joint position so that the excess portion of the inductance structure does not cause deformation, such as extrusion, twisting, or overlapping, thereby affecting the error of the change in inductance. In some embodiments, at the same joint, the inductance sensor (820) may include two inductance structures, each located on the inner and outer sides of the joint. For example, in the elbow joint (320), the inductance sensor (820) may include an outer joint inductance structure and an inner joint inductance structure, both of which may be attached to the outer side of the elbow joint and the inner side of the elbow joint, respectively, corresponding to the wearable body. In some embodiments, the size of the inductance structure located on the outer side of the same joint may be slightly larger than the inductance structure on the inner side of the same joint, so as to adapt to variations in the user's joint movement. In some embodiments, when at least two inductance structures measure the inductance value of the same joint, the final measurement result may be a calculated value (e.g., average value, weighted average value, etc.) based on the measurement results measured by each of the two inductance structures. For example, when the knee is flexed once, the inductance structure on the outer side of the knee is obtained by measuring the outer inductance value, and the inductance structure on the inner side of the knee is obtained by measuring the inner inductance value; the final measurement result may be the average or weighted average of the outer inductance value and the inner inductance value. In some embodiments, to improve the accuracy of the measurement, multiple inductance structures may be placed in the same joint. When at least two inductance structures measure the inductance value of the same joint, the output multiple inductance values ​​are each processed through a reading unit (830) and a processor (840) to obtain the flexion degrees of multiple joints, and the average or weighted average of the flexion degrees of multiple joints is calculated, and the average or weighted average may be the final measurement result. In some embodiments, to improve the accuracy of the measurement, the size, shape, contact position, etc. of the inductance structure may be changed to perform calibration or testing on the inductance sensor (820).For example, for the same joint, measurements can be taken using an inductance structure with a rectangular spiral inductance pattern and an inductance structure with an elliptical spiral inductance pattern, respectively, and the measurement results can be corrected under different joint flexion angles. It should be noted that, for the convenience of explanation, FIG. 11 is an exemplary structural schematic diagram when the wearable body (810) is sportswear or athletic pants, and the wearable body (810) may be an assembly of other forms such as gloves, wristbands, elbow pads, knee pads, shoulder pads, etc., and its function and principle are similar to sportswear or athletic pants, and a person skilled in the art may apply the above-mentioned method to any suitable scene under the premise that they have understood the method of this specification. FIG. 12 is a schematic diagram of a curve showing how the inductance value of an inductance structure having an exemplary spiral inductance pattern according to the description of some embodiments of the present specification changes according to the bending angle of the inductance structure in a non-wearing state. The bending angle of the inductance structure described above in FIG. 12 is a narrow angle formed by two surfaces of the inductance structure during the process in which the inductance structure overlaps in the short axis direction (e.g., the short axis direction of the curve 10) in a non-wearing state. As shown in FIG. 12, when a voltage of 1 V is applied to the inductance structure and an alternating current of 1 kHz is passed through it, the inductance value of the inductance structure having a spiral inductance pattern gradually increases non-linearly as the bending angle of the inductance structure gradually increases. In addition, when the bending angle of the inductance structure is 30°, the inductance value is 3.99μH; when the bending angle of the inductance structure is 60°, the inductance value is 4.52μH; when the bending angle of the inductance structure is 90°, the inductance value is 4.79μH; when the bending angle of the inductance structure is 120°, the inductance value is 4.94μH; when the bending angle of the inductance structure is 150°, the inductance value is 5.02μH; and when the bending angle of the inductance structure is 180°, the inductance value is 5.05μH. In some embodiments, to test the reusability of the inductance structure, the same inductance structure may be measured multiple times (e.g., N times). As shown in Fig. 12, according to the results of multiple measurements, in different measurement processes, the bending angle of the same inductance structure corresponds to the same inductance value, and the relationship curve between the inductance value and the bending angle after N bends always remains consistent. Therefore, the inductance value of the inductance structure does not drift depending on factors such as the repeated use of the material or temperature, and has good recyclability. In some embodiments, the inductance value of an inductance structure having a spiral inductance pattern forms a one-to-one corresponding relationship with the joint flexion angle when worn. For example, when using a sensor for the elbow for elbow movement, applying a voltage of 1 V to the inductance structure and passing an alternating current of 1 kHz, when the joint flexion angle is 180° (i.e., the hand is extended), the inductance value is 3.91 μH; when the joint flexion angle is 90°, the inductance value is 2.91 μH; and when the joint flexion angle is 50° to 60°, the inductance value is 2.03 μH. In some embodiments, since the wearable device and the inductance pattern undergo deformation after wearing, the same bending angle (e.g., the bending angle of the inductance structure in the non-wearing state is equal to the joint bending angle in the wearing state) may correspond to different inductance values ​​under the same inductance structure, depending on whether the device is worn or not. Therefore, to ensure more accurate measurement of the movement state, the inductance structure may be calibrated before the user proceeds with the measurement of the movement state, thereby obtaining a curve of change in the joint bending degree and inductance value corresponding to the user. For example, the user may be made to form different joint bending angles, and the corresponding inductance value may be measured to perform curve fitting, thereby obtaining a curve of change in the joint bending degree and inductance value of the user. In some embodiments, because body types differ, the same joint bending angle may correspond to different inductance values ​​when different users wear the same inductance structure. Therefore, to ensure more accurate measurements of the movement state of different individuals, the inductance structure can be calibrated before each user performs a measurement of their movement state, thereby obtaining a curve of change in joint flexion degree and inductance value corresponding to each user. For example, each user can be made to form different joint flexion angles, and the corresponding inductance value can be measured to perform curve fitting, thereby obtaining a curve of change in joint flexion degree and inductance value for said user. In the subsequent process of measuring the movement state of said user, accurate measurement of the movement state can be achieved based on the curve of change in joint flexion degree and inductance value. In order to satisfy the measurement of the state of motion at different joint positions with differences, in some embodiments, the correspondence (i.e., non-linear change relationship) between the bending angle of the inductance structure at different joint positions and the corresponding inductance value may be different. For example, to satisfy a more accurate measurement of the state of motion of the knee joint, the inductance structure at the knee joint position and the inductance structure at the elbow joint position may have different turns, effective area, and / or coil lengths compared to the elbow joint position, so that the inductance structure at the knee joint position may generate a larger inductance value under the same joint bending angle compared to the inductance structure at the elbow joint position. In some alternative embodiments, in order to make processing convenient and reduce the processing burden on the processing circuit or processing device, inductance structures at different joint positions may be made to generate the same or fundamentally the same inductance value under the same joint flexion angle. For example, by designing the inductance structure at the knee joint position to have a relatively large effective area and a relatively small number of cycles, and designing the inductance structure at the elbow joint position to have a relatively small effective area and a relatively large number of cycles, the flexion angles of the inductance structures at the knee joint and elbow joint positions and the corresponding inductance values ​​may form the same or fundamentally the same non-linear change relationship, thereby making it convenient for subsequent processing by the processing circuit or processing device. Some embodiments of this specification also disclose a sensor system comprising the wearable device (800) and a processing device described above. The processing device may be wirelessly connected to the wearable device (800) and used to generate parameters that reflect joint movement. In some embodiments, the processing device may further process information read by a reading unit (830) in the processing wearable device (800). For example, an operation to calculate an average or weighted average value is performed on a plurality of inductance values ​​measured by an inductance sensor (820) that performs measurements on both the inner and outer sides of the same joint, and parameters that reflect joint movement are determined based on the inductance values ​​obtained by calculation. In some embodiments, parameters that reflect joint movement may include the flexion angle of the joint, the flexion and extension status of the joint, etc. In some embodiments, the process of the processing device generating parameters that reflect joint movement is the same as the process of the processor (840) in the wearable device (800) generating parameters that reflect joint movement. In some embodiments, a processor (840) in the wearable device (800) performs preprocessing on the information read by the reading unit (830) (e.g., calculating the average or weighted average of the inductance values ​​corresponding to the same joint) and transmits the preprocessing result to a processing device to be used to determine parameters reflecting joint movement. The beneficial effects of the wearable device described in some embodiments of the present invention may include, but are not limited to, the following effects: (1) Through the wearable device described in some embodiments of the present invention, the user's joint movements can be converted into changing electrical signals, and furthermore, by generating parameters that reflect joint movements, the user's movements can be accurately captured. (2) By manufacturing an inductance sensor by winding a spiral inductance coil on a substrate, the manufacturing of the wearable device is simple and cost-effective. (3) By using a flexible material, a thin-film flexible inductance sensor can be manufactured, and the wearable device can be worn comfortably. (4) Since the inductance sensor responds only to changes in shape (for example, the measurement result may be related only to the inductance value), the wearable device has a strong ability to prevent interference from external factors such as temperature, humidity, pressure, and sweat, and improves the accuracy and reliability of movement capture and the reusability of the wearable device. (5) The sensitivity of the wearable device can be improved by adjusting the number of turns of the helical inductance coil in the inductance sensor, the size of the area surrounded by the helical inductance coil, and increasing the magnetically conductive film. The basic concepts have been explained above. Of course, to those skilled in the art, the foregoing specification is merely an example and does not constitute a limitation to the present invention. Although not specified herein, those skilled in the art may make various changes, improvements, and modifications to the present invention. Such changes, improvements, and modifications are proposed in the present invention, and therefore, such changes, improvements, and modifications still fall within the essence and scope of the preferred embodiments of the present invention.

Claims

Claim 1 As a wearable device, a wearable body for covering the joint position of a user; It includes at least one inductance sensor comprising an inductance structure formed by surrounding a conductor, wherein the inductance structure comprises a spiral inductance coil, and the number of turns of the conductor in the spiral inductance coil is at least two, and the at least one inductance sensor is attached at a position corresponding to the joint position on the wearable body, and the inductance structure generates an inductance that changes according to the deformation of the joint position, and the wearable body comprises a glove, and when a user wears the wearable device, at least a portion of the at least one inductance sensor is positioned at the joint portion of the user's hand to collect motion signals of the user's hand, the at least one inductance sensor is placed on the back of the user's hand, and the at least one inductance sensor further comprises a magnetically conductive thin film, the magnetically conductive thin film covers one side of the spiral inductance coil far from the user's hand, the at least one inductance sensor is placed on the palm of the user, and the at least one inductance sensor A wearable device comprising a magnetically conductive thin film, wherein the magnetically conductive thin film covers one side of the helical inductance coil that is close to the user's hand, and the electrical resistance of the inductance structure is less than 100Ω. Claim 2 A wearable device according to claim 1, wherein the at least one inductance sensor further comprises a substrate for mounting the helical inductance coil, the substrate comprises a through hole, the through hole is used to bring the inner layer coil of the helical inductance coil to a first signal extraction terminal, the first signal extraction terminal and the second signal extraction terminal are located on the same surface of the substrate, and the second signal extraction terminal is connected to the outer layer coil of the helical inductance coil. Claim 3 A wearable device according to claim 1, wherein the at least one inductance sensor further comprises a substrate for mounting the helical inductance coil, the helical inductance coil comprises at least a first layer coil and a second layer coil, the first layer coil and the second layer coil are arranged in a divided layer in a direction perpendicular to the substrate, and the direction of current in the first layer coil and the second layer coil is the same. Claim 4 A wearable device according to paragraph 3, wherein the first layer coil and the second layer coil are each disposed on both sides of the substrate, the substrate has a through hole, and the first layer coil and the second layer coil are each formed by the same strand of wire passing through the through hole. Claim 5 A wearable device according to claim 1, wherein the thickness of the magnetically conductive thin film is 10 to 500 μm. Claim 6 A wearable device according to any one of claims 1 to 4, wherein the at least one inductance sensor comprises: a finger joint inductance sensor disposed on the back or ventral side of a finger joint to measure the flexion angle of a corresponding finger joint; a finger spacing inductance sensor disposed at the connection position of two adjacent fingers to measure the abduction angle of two adjacent fingers; or a wrist inductance sensor disposed on the back, front, or side of a wrist to measure the flexion angle of the wrist. Claim 7 A wearable device according to claim 6, wherein at least one of the finger joint inductance sensor and the wrist inductance sensor is symmetrical relative to the rotation axis of the corresponding joint, the helical inductance coil of the finger joint inductance sensor has a size greater than 5 mm and less than 20 mm in the direction parallel to the rotation axis of the corresponding joint, and the ratio of the size of the helical inductance coil in the direction perpendicular to the rotation axis of the corresponding joint to the size in the direction parallel to the rotation axis of the corresponding joint is greater than 0.5 and less than 10. Claim 8 In claim 7, at least one of the finger joint inductance sensor and the finger spacing inductance sensor comprises at least a first sub-inductance coil and a second sub-inductance coil, wherein the first sub-inductance coil and the second sub-inductance coil are connected in series through lead wires, and wherein, when a user wears the wearable device, the direction of the current in the first sub-inductance coil and the second sub-inductance coil is the same. Claim 9 delete Claim 10 delete Claim 11 delete Claim 12 delete Claim 13 delete Claim 14 delete Claim 15 delete Claim 16 delete Claim 17 delete Claim 18 delete Claim 19 delete Claim 20 delete Claim 21 delete Claim 22 delete Claim 23 delete Claim 24 delete Claim 25 delete Claim 26 delete Claim 27 delete Claim 28 delete Claim 29 delete

Images