Intelligent skipping rope with sensing rope body

Abstract

The invention relates to the technical field of sports goods, and provides an intelligent skipping rope with a sensing rope body, which comprises a rope body made of a flexible insulating material, at least one first conductive part is integrated in the rope body along the length direction, and the first conductive part is made of a piezoresistive or piezoelectric composite material; the resistance or voltage signal is obviously changed along with the tensile strain; and the second conductive part is made of a high-conductivity material, the resistance of the second conductive part is kept stable when the second conductive part is stretched, and the number of the second conductive part is zero or multiple. Through the sensing part integrated in the skipping rope body, real-time monitoring of tension distribution in the rope body is realized, including tension at different positions in the length direction and different tension at a certain position in the circumferential direction, so that the accuracy and real-time performance of rope skipping movement data collection are greatly improved; by adopting a flexible high-molecular material, a conductive high-molecular polymer material and the like, complete flexibility and integration of the sensing part, the wire part and the rope body part are realized.

Description

Technical Field

[0001] The present invention relates to the technical field of sports equipment, in particular to an intelligent skipping rope with a sensor rope body. Background Art

[0002] Rope skipping is a highly popular fitness and competitive sport. Improving its effectiveness relies on precise analysis and training guidance of the skipping motion. Traditionally, monitoring of rope skipping relies primarily on sensors on the handles, such as triaxial accelerometers, gyroscopes, and inertial measurement units (IMUs). While these devices can effectively count the number of skipping turns, they cannot directly reflect the overall or local forces and spatial configuration of the rope, limiting in-depth analysis of rope skipping motion models.

[0003] Furthermore, while some patents attempt to incorporate sensors into jump ropes, these sensors are mostly traditional pressure sensors that activate only when the middle of the rope hits the ground. These sensors are used to assist in determining the number of turns completed and fail to fully capture the dynamic tension changes in the rope. Currently, spatial morphology acquisition relies primarily on optical methods, using high-speed cameras for imaging and image data analysis. However, while optical methods can capture spatial morphology, they require bulky and expensive equipment and complex data processing, making them unsuitable for daily training applications.

[0004] For example, utility model patent 201520613562.3 discloses a smart skipping rope. The end of the left handle is provided with a solar panel, and the interior of the left handle is provided with a battery. The battery is electrically connected to the solar panel, and the battery provides power for the smart skipping rope. Importantly, a pressure sensing module is provided in the middle of the rope. When the rope contacts the ground, a pressure sensing signal is generated and transmitted. In this way, the speed and energy consumption of the skipping rope can be calculated by calculating the number of times the pressure sensing module contacts the ground, the contact of the human foot with the ground, and comprehensive information such as physical condition indicators. The pressure sensing module in this patent only works when it contacts the ground. When the rope body is suspended in the air, the pressure sensing module does not work. Therefore, the pressure sensing module here only acts as a switch, that is, it determines whether it is in contact with the ground or not. It is impossible to accurately give the force conditions at each position of the rope body, and it is even more impossible to infer the spatial shape of the rope body during the movement process.

[0005] Similar to the above-mentioned utility model are invention patent 202110531271.X, which provides a precise counting method and system for intelligent rope skipping, and invention patent 202111611866.2, which provides an implementation system for a precise counting method for intelligent rope skipping. They both have pressure sensors evenly distributed inside the middle section of the rope body. Whenever the pressure sensor is impacted, that is, the middle section of the rope body hits the surface of the support plate, the processing module changes to the second partition in the instruction storage module to perform a technique. At the same time, the pressure sensor at the bottom of the support plate hits the crystal piezoelectric crystal plate once, causing the piezoelectric crystal plate to emit a pulse current. The host calculates the number of jumps of the athlete by real-time monitoring the number of pulse currents emitted by the piezoelectric crystal plate. Therefore, the pressure sensor here only acts as a switch, that is, to determine whether it is in contact with the ground, so as to count.

[0006] Invention patent 202110099532.5 provides a smart skipping rope and a skipping rope counting method, and utility patent 202120201145.3 provides a smart skipping rope, including two handles, a rope body connecting the two handles, a pressure sensing module group and a control module. The handle is provided with a rotating shaft, and the pressure sensing module group includes a pressure sensing trigger unit and at least two pressure sensing units. The pressure sensing unit is arranged on the handle, and the pressure sensing trigger unit is arranged on the rotating shaft and corresponds to the position where the pressure sensing unit is arranged, so that the pressure sensing trigger unit triggers the pressure sensing unit as the rotating shaft rotates, reducing the loss of the pressure sensing module group and improving the counting accuracy. The pressure sensing unit is connected to the control module so that the trigger information generated by the pressure sensing unit and the pressure sensing trigger unit is transmitted to the control module in a timely manner, so that the control module analyzes the trigger information to obtain the number of skipping laps, further improving the counting accuracy. Therefore, the pressure sensing module here cannot provide the force and stretching conditions of the rope body itself.

[0007] In addition, more patents use accelerometers, optical fibers, gyroscopes, magnets, Hall effect sensors, etc., and the devices are placed in or near the handle to calculate the number of jumps. These patents include utility model 202121880829.7, which provides a jump rope handle capable of detecting direction and a jump rope, 202320747195.0, which provides a jump rope handle, jump rope, and jump rope system with a new turn measurement structure, invention patent 202110897105.1, which provides a smart jump rope, 202311084131.8, which provides a jump rope frequency calculation method, storage medium, and jump rope, 202310289474.1, which provides a method and device for identifying fancy jump rope, 202310289474.1, which provides a method and device for identifying fancy jump rope, and 202210553143.X, which provides a method for identifying jump rope patterns and a jump rope. Their sensors are all located on or near the handles, not along the rope, so they cannot capture the tension at every position on the rope.

[0008] Therefore, there is an urgent need for a device that can simply and effectively capture the tension distribution inside the rope body of a skipping rope, so as to achieve comprehensive monitoring and analysis of the rope skipping action. Summary of the Invention

[0009] In view of the shortcomings of the existing technology, the present invention provides an intelligent skipping rope with a sensor rope body, comprising:

[0010] A rope body made of a flexible insulating material, with at least one first conductive portion integrated along its length. The first conductive portion is made of a piezoresistive or piezoelectric composite material, and its resistance or voltage signal changes significantly with tensile strain;

[0011] a second conductive portion, the second conductive portion being made of a highly conductive material whose resistance remains stable when stretched, the second conductive portion having zero or more strips;

[0012] A data processing module is located inside the handle and is connected to the first conductive part and the second conductive part through a wire. The data processing module is used to infer the tension distribution and spatial shape of each position of the rope body by measuring the resistance or voltage change between the second conductive part and the first conductive part.

[0013] Preferably, the first conductive part and the second conductive part are arranged in parallel or spirally inside the rope body, and the second conductive part is electrically connected to the first conductive part at different positions along the length of the rope body to form a multi-point resistance measurement network.

[0014] Preferably, the second conductive parts are evenly distributed around the circumference of the rope cross section, and each independent second conductive part is connected to a different angular position of the first conductive part, for measuring tensile strain data at different circumferential angles at the same position of the rope.

[0015] Preferably, the material of the first conductive part is selected from at least one of graphene-doped polyimide film, carbon nanotube composite conductive fiber or piezoelectric polymer material; the material of the second conductive part is selected from at least one of metal-plated yarn, metal nanowire composite material or conductive polymer.

[0016] Preferably, the number of the second conductive parts distributed in the circumferential direction of the rope cross section is 3 to 6, each of which is independently connected to a different physical position of the first conductive part, forming a multi-dimensional tension monitoring parameter, which includes:

[0017] Spatial dimension: covering the length direction and circumference direction of the rope;

[0018] Data Dimensions: Generate parameter data sets through resistance or voltage changes, including tension magnitude, position, and direction.

[0019] Preferably, the first conductive part and the second conductive part inside the rope body are integrally formed with the insulating material by melt extrusion, textile strand processing or 3D printing technology.

[0020] Preferably, the data processing module has a built-in catenary equation model and a neural network algorithm model for converting strain data into real-time spatial morphological information of the rope body and transmitting the information to the user terminal via the wireless communication module.

[0021] Preferably, the spiral structure of the first conductive part or the braided structure of the second conductive part is formed by a thermal stretching or twisting process.

[0022] Preferably, an auxiliary sensor is integrated in the handle, and the auxiliary sensor includes any one or a combination of two or more of an accelerometer, a gyroscope or an inertial measurement unit, and its data is fused with the rope tension data to improve the accuracy of motion parameter analysis.

[0023] Preferably, the surface of the rope body is covered with a waterproof insulating layer, and the lead of the conductive part is connected to the data processing module in the handle through a waterproof packaging interface.

[0024] Working principle: Flexible sensing components and flexible wires are distributed inside the skipping rope, so that the changes in the stretching conditions (tension) of the skipping rope at each different position along the length of the skipping rope can be obtained during skipping, outlining a database of the spatial form of the skipping rope at every moment, and the changes in the stretching conditions (tension) in the circumferential direction of the skipping rope can also be captured, thereby further supplementing the spatial form distribution data of the rope. The sensing component can be made of a piezoresistive composite material, that is, a material whose resistance changes significantly when stretched, or a piezoelectric composite material, that is, a material that can generate a significant voltage signal when stretched. The latter is more adept at high-frequency signals and can handle data collection during high-speed skipping;

[0025] In addition, the flexible sensing components, wires and the skipping rope body are integrated into one. However, all the previous patents place sensors, that is, traditional hard sensors, such as three-axis, six-axis or nine-axis accelerometers, gyroscopes, inertial measurement units, Hall effect sensors and optical sensors, etc. in the handles of the skipping rope, rather than evenly distributed in the skipping rope body, so they cannot capture the spatial shape of the skipping rope body. Even if some patents try to place hard sensor pressure sensors in the middle of the skipping rope body, they can only obtain the pressure at the sensor position and switch information to help improve the accuracy of skipping rope counting. In the past, capturing the spatial shape of the skipping rope body required the use of high-speed camera photography, but the equipment was bulky and expensive, making it inconvenient to use. So in general, the point that needs to be protected most in the present invention is the use of flexible sensing materials, which are evenly arranged inside the skipping rope body to obtain the change in the tension of the skipping rope body itself, and the change in this tension includes two dimensions. The first is the difference in tension at each different position along the length of the skipping rope, and the second is the difference in tension at each angle along the circumferential direction at the same position of the skipping rope body, thereby outlining a comprehensive rope force data information library.

[0026] The present invention provides a smart skipping rope with a sensor rope body. It has the following beneficial effects:

[0027] 1. The present invention realizes real-time monitoring of the tension distribution inside the rope body through the sensor part integrated in the rope body, including the tension at different positions in the length direction and the different tensions in the circumferential direction at a certain position, which greatly improves the accuracy and real-time performance of rope skipping motion data collection.

[0028] 2. The present invention combines theoretical models such as stress-strain relationship and catenary equation in mathematics, as well as currently popular neural network algorithm models, deep learning algorithms and AI databases. It can infer the spatial shape of the rope through tension distribution data, providing a new way to accurately analyze rope skipping.

[0029] 3. Compared with expensive monitoring methods such as optical methods, the sensing technology used in the present invention is low-cost, easy to popularize and apply, and the data processing is relatively simple, making it suitable for daily training use.

[0030] 4. The present invention can provide scientific training feedback to athletes through accurate monitoring and analysis of the tension and shape of the rope during rope skipping, helping them adjust their rope skipping movements and improve training effects.

[0031] 5. The present invention realizes complete flexibility and integration of the sensing part, the wire part and the rope body part by adopting flexible polymer materials and conductive polymer materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a structural diagram of embodiment 1 of the present invention;

[0033] Figure 2 This is a structural diagram of embodiment 2 of the present invention;

[0034] Figure 3 This is a structural diagram of embodiment 3 of the present invention;

[0035] Figure 4 This is a structural diagram of embodiment 4 of the present invention. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] As another aspect of the present invention, the present invention provides an intelligent skipping rope with a sensor rope body, comprising:

[0038] The main structure is a rope body made of flexible material, which is elastic as a whole and stretchable, so the rope body has a certain elongation when skipping at high speed. The main part of the present invention can be divided into an insulating part, a first conductive part, and a second conductive part according to its function. The insulating part is the base material of the skipping rope body. The insulating part is completely non-conductive, the first conductive part is a semiconductor, and the second conductive part is a good conductor. The resistivity of the semiconductor of the first conductive part is much greater (at least two orders of magnitude different) than the resistivity of the good conductor of the second conductive part. The resistivity of the semiconductor of the first conductive part can be uniformly distributed, or it can have different resistivities at different positions. The first conductive part and the second conductive part are both buried in the insulating part, and the second conductive part can have zero, single or multiple strips.

[0039] When the second conductive portion is zero, the first conductive portion has two, arranged inside along the length of the insulator rope body, with the exception of the right tail end being in electrical contact with each other, and the rest not in contact with each other, and the left tail end, i.e. the positive and negative poles, are both led out from one end of the insulator part for easy connection to an external circuit;

[0040] When the second conductive portion is one, the first conductive portion is one, and the first conductive portion and the second conductive portion are arranged inside the insulator along the length of the insulator rope. The first conductive portion and the second conductive portion are electrically in contact with each other at the right end inside the insulator, and the rest of the portions are not in contact with each other. The left ends of the first conductive portion and the second conductive portion, i.e., the positive and negative poles, are led out from the left end of the insulator for easy connection to an external circuit.

[0041] When there are multiple second conductive parts and only one first conductive part, both the second conductive part and the first conductive part are arranged inside the insulator along the length of the insulator rope. The multiple good conductors of the second conductive part do not contact each other. The multiple good conductors of the second conductive part are electrically connected to different positions of the first conductive part, and at other positions they are no longer in contact with the first conductive part. The multiple good conductors of the first conductive part and the second conductive part are led out from the left end of the insulator, and the number of leads is the number of the first conductive part plus the number of the second conductive part, which is convenient for connection to the external circuit.

[0042] The semiconductor of the first conductive part has a significant piezoresistive effect, so along the length of the rope, the first conductive part is very sensitive to tensile strain, and the resistance of the first conductive part increases significantly when stretched.

[0043] The second conductive portion is a good conductor with no piezoresistive effect, and its resistance remains essentially unchanged during stretching. Because the second conductive portion can be electrically connected to the first conductive portion at different locations, measuring the resistance between each pair of good conductors in the second conductive portion allows us to infer the stretching conditions at different locations on the first conductive portion, thereby obtaining tension data at different locations on the rope.

[0044] Main body: The main structure of the rope is made of flexible materials, including an insulating part, a first conductive part, and a second conductive part. They are all elastic, so the rope can be stretched. Therefore, the rope has a certain elongation when skipping at high speed.

[0045] Elasticity: Elasticity can come from two sources.

[0046] a. The material itself is elastic, for example, the first conductive part is an elastic semiconductor, and the second conductive part is an elastic good conductor;

[0047] b. The material itself is inelastic or has poor stretchability, but its overall elasticity can be achieved through its shape. For example, the first conductive portion is a semiconductor filament that lacks elastic stretchability, but is in a spiral shape (similar to the stretchable portion of traditional telephone cords). This spiral structure provides stretchability and thus elasticity. Similarly, the second conductive portion is a good conductor filament that lacks elastic stretchability, but is in a spiral shape (same as above). This spiral structure provides stretchability and thus elasticity.

[0048] Position: The first and second conductive portions, with the exception of one end connected to the circuit, are buried within the insulator. Within the insulator, the two conductors of the second conductive portion are electrically connected to the first conductive portion at different locations along its length. Beyond these locations, the multiple good conductors do not contact each other. If contact between the good conductors is necessary, an insulating layer can be added to the surface of the good conductors to prevent short circuits at the contact point.

[0049] The main logic is: by measuring the multiple good conductor terminals of the second conductive part exposed outside the insulator, the resistance distribution at different positions of the first conductive part is obtained, and the strain size is inferred, that is, the strain at each position along the length of the rope is known, and based on the experimental data of the elastic modulus of the material as a whole, the size of the tension is inferred, and then the spatial distribution of the rope at every moment during the rope skipping exercise is calculated based on mathematical models such as the catenary equation and the neural network calculation model.

[0050] Secondary logic: In addition to the strain information along the rope's length, the strain within each circular cross-section of the rope, or in other words, the strain along the circumference, also needs to be measured. Therefore, if the rope thickness allows, multiple good conductor units of the second conductive portion can be arranged within a 360-degree circle at a single location on the jump rope. This can obtain stretch data at different circumferential angles at the same location, analyze the circular motion patterns of the rope during jump rope swinging, provide another dimension of data for motion morphology analysis and athlete training, and help establish a more accurate real-time 3D rope morphology database.

[0051] Shape: The cross-section of the semiconductor in the first conductive portion can be any shape, such as circular, square, rectangular, diamond, triangle, petal, straight, wavy, spiral, braided, textured, or curved. This can be customized to meet user needs, as long as the resistance of the first conductive portion changes significantly when stretched. Similarly, the cross-section of the good conductor in the second conductive portion can be any shape, as long as the resistance remains stable when stretched.

[0052] Conductivity: The conductivity of the semiconductor in the first conductive part is much lower than the conductivity of the good conductor in the second conductive part. The difference is huge, at least more than two orders of magnitude.

[0053] As another aspect of the present invention, the present invention provides a method for preparing an intelligent skipping rope with a sensor rope body, comprising the following steps:

[0054] Materials: The semiconductor in the first conductive portion can be a conductive film material, a conductive composite material, a conductive fiber material, or a conductive fiber assembly material. Preferably, it is a flexible conductive polymer material or a conductive composite material, such as a graphene-doped polyimide film, a carbon nanotube-doped polyethylene terephthalate film, or a carbon fiber. The good conductor in the second conductive portion can be a metal-plated yarn, a metal staple yarn, a metal filament, an intrinsically conductive polymer, a liquid metal alloy, a carbon fiber, or a conductive nanocomposite material.

[0055] Processing: The semiconductor and good conductor can be obtained by printing, spraying, vapor deposition, dipping, high-temperature sintering, spinning, spinning, winding, twisting, drawing or thermal bonding, weaving, sewing or embroidery. The first conductive part and the second conductive part can be combined with the insulating part by preparing the three parts at one time through multi-axis spinning, positioning the first and second conductive parts and then coating the insulating part, processing the first and second conductive parts using textile yarn processing methods and then covering the insulating part, as well as template injection molding, preform hot drawing, cables, wires, ropes, jump ropes and strip processing methods used in the textile industry.

[0056] Piezoelectric: In addition to piezoresistive materials, the semiconductor material in the first conductive part of all the above claims can also be a piezoelectric material, such as piezoelectric ceramic powder composite materials, piezoelectric crystal nanocomposites, organic polymer piezoelectric materials (PVDF, etc.), semiconductor piezoelectric materials (such as zinc oxide), etc. This allows the corresponding first conductive part to be stretched to generate an effective voltage signal output. Compared to semiconductor piezoresistive materials, semiconductor piezoelectric composite materials can have better dynamic response performance and higher frequency response characteristics.

[0057] The following is an introduction based on specific embodiments

[0058] Example 1

[0059] See also Figure 1This example provides a smart skipping rope with a sensor-based structure, including three sub-cases: 1-1, 1-2, and 1-3. It can identify the overall tension of the rope during skipping, or it can separate the rope into two sections, each measuring real-time tension. The measured tension data can be used to complement existing technologies such as triaxial accelerometers, gyroscopes, inertial measurement units, and Hall effect sensors to analyze information such as skipping speed and number of turns.

[0060] Figure 1 The right side of the figure is a schematic diagram of the structure of the rope body along the length direction, and the left side is a schematic diagram of the cross section corresponding to the dotted line position.

[0061] Case 1-1 is the most basic structural type, consisting of only an insulator portion 1 and a first conductive portion 2, with the insulator portion 1 being the main structure of the rope. The first conductive portion 2 is entirely contained within the insulator portion 1, except for the exposed connection point at the left end to facilitate connection to an external circuit. The first conductive portion 2 is arranged longitudinally along the insulator portion 1. At the rightmost end of the first conductive portion 2, the upper and lower semiconductor portions are joined together, creating an electrical connection. The insulator portion 1 is preferably made of polyvinyl chloride (PVC), an insulating material that is non-conductive. The first conductive portion 2 is preferably made of a PVC / multi-arm carbon nanotube composite. Due to the high conductivity of multi-walled carbon nanotubes, the MWCNT content can be moderately controlled to ensure that the composite exhibits semiconductor properties as a whole, with a significant change in overall resistance along its length when stretched. This structure can be prepared by simultaneously melt-extruding the two materials, ensuring that the first conductive portion 2 is completely encapsulated within the insulator portion 1.

[0062] The rightmost end of the upper and lower semiconductors of the first conductive portion 2 can be located at the rightmost end of the rope, or it can be located at any other desired position. When located at the rightmost end, the first conductive portion 2 can obtain tension data for the entire rope; when located at any other position, the first conductive portion 2 can obtain tension data for the line connecting the left end of the rope from the closed position.

[0063] Case 1-2 is a structural variant developed from Case 1-1. It also consists of only an insulator portion 1 and a first conductive portion 2, with the insulator portion 1 forming the main structure of the rope. Unlike Case 1-1, Case 1-2 also includes two first conductive portions 2, located at the left and right ends. This allows for simultaneous real-time deformation data of the left and right halves of the rope. Compared to Case 1-1, this data can be used to compare the differences in left-hand and right-hand movements during rope skipping, as well as their impact on the rope's motion.

[0064] Subdivision case 1-3 adds a second conductive part 3 on the basis of subdivision case 1-1, and the added part is used to replace a semiconductor part on the lower half of the first conductive part 2. That is, the entire circuit is a series connection of the first conductive part 2 and the second conductive part 3. Since the second conductive part 3 has a higher conductivity than the first conductive part 2, the difference in conductivity is preferably more than two orders of magnitude, thereby ensuring that the second conductive part 3 only plays the role of a conductor. Therefore, under the same stretching ratio, the resistance change of the second conductive part 3 contributes very little to the resistance change of the entire circuit and can be basically ignored. The material of the second conductive part 3 is preferably a multi-walled carbon nanotube / silver nanowire / copper nanowire / polyvinyl chloride conductive composite material. Due to the addition of metal nanowires, the resistance of the second conductive part 3 will be significantly lower than that of the first conductive part 2.

[0065] Example 2

[0066] See also Figure 2 This example provides a smart skipping rope with a sensor, including two sub-cases 2-1 and 2-2. It can identify the real-time tension distribution along the length of the rope in different regions during skipping. This tension distribution data is combined with the catenary equation, a rope force analysis model, and a database of neural networks, deep learning, and artificial intelligence algorithms to comprehensively analyze the moment-by-moment changes in the rope's spatial shape during skipping.

[0067] Figure 2 The right side is a schematic diagram of the structure inside the rope along the length direction, and the left side is a schematic diagram of the cross-section corresponding to the dotted line position.

[0068] Detailed Case 2-1

[0069] The rope consists of three parts: an insulating portion 1, a first conductive portion 2, and a second conductive portion 3. The insulating portion 1 is completely non-conductive. The first conductive portion 2 has medium conductivity, a semiconductor-type conductivity, and exhibits a significant change in resistance when stretched. The second conductive portion 3 has high conductivity, a good conductor type. Its resistance barely changes when stretched, or even if it does, its absolute value is negligible compared to that of the first conductive portion 2 due to its low resistance. Both the first and second conductive portions 2 and 3 run parallel to the length of the insulating portion 1. Except for the connection point at the left end, both the first and second conductive portions 2 and 3 are completely enclosed within the insulating portion 1. Typically, the second conductive portion 3 has three strips, each of which connects to different locations on the first conductive portion 2 at its right end. This way, the left end has four connectors. Connecting the top three connectors and the bottom connector, three sets of resistance data are obtained, representing the internal resistance distribution of the three regions of the jump rope.

[0070] In terms of material selection, the preferred materials are: polyurethane for the insulator portion 1, a polyurethane / graphene composite material for the first conductive portion 2, and a polyurethane / graphene conductive composite material for the second conductive portion 3. The graphene loading between the first conductive portion 2 and the second conductive portion 3 differs significantly. The graphene loading in the first conductive portion 2 barely exceeds the percolation threshold, meaning it has a moderate level of conductivity. However, the graphene loading in the second conductive portion 3 far exceeds the percolation threshold, meaning it has a much higher conductivity than the first conductive portion 2.

[0071] The processing method can be template injection molding: (1) a total of four long strips of the first conductive part 2 and the second conductive part 3 are obtained by melt extrusion process; (2) the right ends of the first conductive part 2 and the second conductive part 3 are electrically connected by using the same conductive composite material; (3) two pre-set templates are used to inject polyurethane materials respectively to form a corresponding groove. Figure 2 The left and right halves of the middle left half of the circle, i.e., the diameter position of the semicircle, have corresponding grooves for matching the sensing part and the wire part of the four polyurethane graphene conductive composite materials; (4) the left semicircle part, the right semicircle part and the middle polyurethane graphene composite material strip are placed according to the pre-set position, and the three are bonded into a complete rope body using polyurethane material.

[0072] Subdivision Case 2-2 is based on the material of Subdivision Case 2-1, with reference to Figure 2In the lower half of the jump rope, the first conductive portion 2 is located in the center of the insulating portion 1. The six segments of the second conductive portion 3 are parallel to the first conductive portion 2 in the longitudinal direction, but their right ends are electrically connected to different locations on the first conductive portion 2. Except for the electrical connection points, the six segments of the second conductive portion 3 do not touch each other. As can be seen from the left image, the six segments of the second conductive portion 3 are arranged in a hexagonal pattern around the first conductive portion 2, without touching each other. The left ends of the first and second conductive portions 2 and 3 are exposed at the left end of the insulating portion 1. Except for the exposed ends that facilitate connection to external circuits, the first and second conductive portions 2 and 3 are completely enclosed by the insulating portion 1. By connecting the positive and negative terminals of a resistance measuring device to the center terminal of the first conductive portion 2 at the left end and the six terminals of the second conductive portion 3 around the circumference, the resistance distribution of six different regions within the jump rope can be obtained, which corresponds to the strain data for each region. If this schematic diagram shows only the left half of a skipping rope, and the right half is symmetrical to the left half, then this smart skipping rope can have 12 tension measurement areas. Compared with the previous embodiment 1 and the subdivision case 2-1 of embodiment 2, this example can have more detailed tension distribution data. Similarly, more second conductive parts 3 can be arranged in the insulator 1, so as to exceed 12 tension measurement areas, and obtain more detailed real-time distribution data of the tension of the rope in the longitudinal direction during skipping. This is used to more accurately outline the spatial shape of the rope during skipping, which can assist in skipping rope design and conduct comprehensive and objective analysis of athletes' skipping training.

[0073] The processing method for Subdivision Case 2-2 can be similar to that of Subdivision Case 2-1, or a hot-drawing preform processing process can be used. For example, a short, thick preform is first produced, with the insulator portion 1, the first conductive portion 2, and the second conductive portion 3 preformed therein. The structure is similar to the schematic diagram, but the proportions are different, and the preform is essentially a cylinder rather than a filament. After the preform is processed, a high-temperature hot-drawing process is used to stretch the cylinder into a round filament. For example, a five-centimeter cylinder can be stretched to two hundred centimeters, resulting in a skipping rope with the same structure, but with each section being more slender.

[0074] Example 3

[0075] See also Figure 3 This example is similar to Example 1 and provides a smart skipping rope with a sensor rope body that can identify the real-time tension distribution of the entire rope along the length during skipping. This example includes two sub-cases 3-1 and 3-2.

[0076] Compared with Example 1, this embodiment has two differences. First, the interior of the first conductive portion 12 is made of semiconductor material, and its resistance changes significantly when stretched, but its surface is covered with PVC material;

[0077] Based on the above-mentioned characteristic subdivision, in case 3-1, the two subdivided strips in the first conductive portion 12 are electrically connected except for the right end, and the rest of the strips are arranged in a spiral like a telephone wire;

[0078] Based on the above characteristics, in case 3-2, the first conductive part 12 and the second conductive part 13 are electrically connected at the right end, and the rest of the parts are spirally arranged and entangled with each other like telephone wires.

[0079] The processing method of this embodiment can be implemented based on the first embodiment. That is, during melt extrusion, in addition to longitudinally stretching the rope body with heat, the rope body is also rotated before it is completely solidified, thereby achieving an internal spiral structure. In addition, the rope body can also be produced using twisting equipment in the textile industry.

[0080] This embodiment adopts a spiral structure, which can greatly alleviate the material fatigue caused by repeated stress on the rope during rope skipping, thereby effectively increasing the fatigue life of the electronic part of the rope. In other words, the three-dimensional spatial structure design can alleviate local stress concentration.

[0081] In addition, the first conductive part 12 and the second conductive part 13 in this embodiment can also respectively adopt cotton fiber yarn impregnated with carbon nanotubes and silver-plated nylon yarn (after silver plating, a polyurethane insulation layer is added to the surface), as long as the two yarns are intertwined (twisted) to form strands, and then the strands are wrapped in the rope body of the skipping rope, that is, the insulator 11. It should be noted that when a textile structure is adopted, in addition to the spiral structure of the first conductive part 12 and the second conductive part 13 in the middle, since they are both made of textile yarn, the yarn itself also has a spiral structure, so this creates a two-dimensional spiral structure, which can more effectively relieve local stress concentration and effectively improve the fatigue life of the smart skipping rope body.

[0082] Example 4

[0083] See also Figure 4 This example provides a smart skipping rope with a sensory rope that can identify the real-time tension distribution at different locations along the rope's circumference during skipping. This tension distribution data can be used to further supplement rope force analysis models and databases such as neural networks, deep learning, and artificial intelligence algorithms, thereby more accurately determining the moment-by-moment changes in the rope's spatial shape during skipping. In particular, it can provide information on the changes in tension at the same location in different circumferential directions caused by the rope's rotation.

[0084] This embodiment has three parts: an insulator portion 101, a first conductive portion 102, and a second conductive portion 103. The insulator portion 101 is completely non-conductive. The first conductive portion 102 has medium conductivity, a semiconductor-type conductivity, and exhibits a significant change in resistance when stretched. The second conductive portion 103 has high conductivity, a good conductor type, and exhibits essentially no change in resistance when stretched. Even if there is a relative change, the absolute value of the resistance change is negligible compared to that of the first conductive portion 102 due to its low resistance. The first and second conductive portions 102, 103 are arranged parallel to the length of the insulator portion 101. Except for the terminal at the left end, the first and second conductive portions 102, 103 are completely enclosed within the insulator portion 101. Typically, the first conductive portion 101 has six strips, each of which connects to different locations on the second conductive portion 103 at its right end. Note that only four of these six strips are shown in the right figure because two of the upper and two lower strips are at the same height. Thus, the left end has seven connectors, each made of a different material. Six sets of resistance data can be obtained, representing the resistance distribution at six locations along the circumference of the rope. This resistance distribution can be used to infer strain information, thereby achieving the purpose of monitoring the circumferential strain of the rope. The number of entries in the first conductive portion 101 can be increased or decreased as needed.

[0085] The processing method of this embodiment can refer to embodiment 2-2 and embodiment 2-1. In addition, the skipping rope body can also be constructed in sequence using methods such as 3D printing.

[0086] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent skipping rope with a sensor rope body, characterized in that: include: A rope body made of a flexible insulating material, with at least one first conductive portion integrated along its length. The first conductive portion is made of a piezoresistive or piezoelectric composite material, and its resistance or voltage signal changes significantly with tensile strain; a second conductive portion, the second conductive portion being made of a highly conductive material whose resistance remains stable when stretched, the second conductive portion having zero or more strips; A data processing module is located inside the handle and is connected to the first conductive part and the second conductive part through a wire. The data processing module is used to infer the tension distribution and spatial shape of each position of the rope body by measuring the resistance or voltage change between the second conductive part and the first conductive part.

2. The intelligent skipping rope with a sensor rope body according to claim 1, characterized in that: The first conductive part and the second conductive part are arranged in parallel or spirally inside the rope body, and the second conductive part is electrically connected to the first conductive part at different positions along the length of the rope body to form a multi-point resistance measurement network.

3. The intelligent skipping rope with a sensor rope body according to claim 1, characterized in that: The second conductive parts are evenly distributed around the circumference of the rope cross section, and each independent second conductive part is connected to a different angular position of the first conductive part, for measuring tensile strain data at different circumferential angles at the same position of the rope.

4. The intelligent skipping rope with a sensor rope body according to claim 1, characterized in that: The material of the first conductive part is selected from at least one of graphene-doped polyimide film, carbon nanotube composite conductive fiber or piezoelectric polymer material; the material of the second conductive part is selected from at least one of metal-plated yarn, metal nanowire composite material or conductive polymer.

5. The intelligent skipping rope with a sensor rope body according to claim 3, characterized in that: The number of the second conductive parts distributed in the circumferential direction of the rope cross section is 3 to 6, each of which is independently connected to a different physical position of the first conductive part to form a multi-dimensional tension monitoring parameter, which includes: Spatial dimension: covering the length direction and circumference direction of the rope; Data Dimensions: Generate parameter data sets through resistance or voltage changes, including tension magnitude, position, and direction.

6. The intelligent skipping rope with a sensor rope body according to claim 1, characterized in that The first conductive part and the second conductive part inside the rope body are formed into an integrated form with the insulating material through melt extrusion, textile strand processing or 3D printing technology.

7. The intelligent skipping rope with a sensor rope body according to claim 1, characterized in that: The data processing module has a built-in catenary equation model and a neural network algorithm model, which are used to convert strain data into real-time spatial morphological information of the rope body and transmit it to the user terminal through the wireless communication module.

8. The intelligent skipping rope with a sensor rope body according to claim 1, characterized in that: The spiral structure of the first conductive portion or the braided structure of the second conductive portion is formed by a thermal drawing or twisting process.

9. The intelligent skipping rope with a sensor rope body according to claim 1, characterized in that: An auxiliary sensor is integrated in the handle, and the auxiliary sensor includes any one or a combination of two or more of an accelerometer, a gyroscope or an inertial measurement unit. The data of the auxiliary sensor is fused with the rope tension data to improve the accuracy of motion parameter analysis.

10. The intelligent skipping rope with a sensor rope body according to claim 1, characterized in that: The surface of the rope body is covered with a waterproof insulating layer, and the lead of the conductive part is connected to the data processing module in the handle through a waterproof packaging interface.

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