A kind of sports pants for monitoring knee joint force based on flexible sensing

Abstract

The invention belongs to the field of clothing, and relates to a pair of knee joint force monitoring sports pants based on flexible sensing, comprising a trouser body and a monitoring unit arranged on the trouser body, wherein the monitoring unit comprises a flexible sensor and a data transmission module; the hip area adopts a heart-shaped arc design; the waist and the areas on both sides of the waist are of a one-piece design; the knee area adopts a smooth arc design, and an inner patch pocket is also arranged on the inner side of the front end; the flexible sensor is located between the inner patch pocket and the front end of the knee area, and is composed of a highly elastic chemical fiber conductive fabric with a conductive coating, a lead and an elliptical cloth piece; the structural design of the inner patch pocket can realize a good fit between the three-dimensional bending structure of the knee joint of a human body during running and the flexible sensor, thereby improving the accuracy of the monitoring data; the wearing comfort of the sports pants is improved by optimizing the functional structural design, while the functionality of the sports pants is improved, the sports pants are comfortable to wear, have good air permeability, are suitable for wearing during exercise, have broad market prospects, and are environmentally friendly.

Description

Technical field:

[0001] The present invention belongs to the field of clothing, and specifically relates to a pair of knee joint force monitoring sports pants based on flexible sensing. The wearing comfort of the sports pants is improved while the functionality of the sports pants is improved by optimizing the functional structural design. At the same time, the flexible sensor monitors the pressure on the knee joint during running in real time to prevent knee joint injuries. Background technology:

[0002] Sports pants are often worn by people when doing sports. Due to their good perspiration and stretchability, people can reduce muscle strain during exercise and provide good protection for people when exercising. For example, Chinese patent CN201410589589.3 discloses a 3D molded women's form-fitting health sports pants. According to the principle of ergonomics, a combination of tissue and yarn with greater elasticity is used in the parts that need to have stronger sports functions, and the whole piece is woven once for 3D stereoscopic molding. The waist of the sports pants adopts double-layer ribbing; the abdomen, rear waist and knees adopt elastic added yarn tissue; the crotch, the circle around the buttocks and the cuffs adopt drawstring tissue, and the buttocks also adopt drawstring tissue to adapt to the state of the protruding buttocks; the inner thigh adopts the loop tissue; the buttocks and other parts adopt the weft plain tissue; the whole piece is 3D woven with a seamless knitting machine, and there is no seam at the cuffs, which can achieve a seamless and close-fitting 3D fit effect; sports pants A variety of tissues are used to adapt to the 3D uneven body shape of the human body, increase elasticity and elastic recovery force, and play a shape-preserving role; Chinese patent CN201820127543.3 discloses an auxiliary mountaineering sports pants, including a waistband and trouser legs, and the front and back parts of the trouser legs above the knees and below the crotch are respectively provided with a first trouser loop and a second trouser loop. The auxiliary mountaineering sports pants also include a belt and a strap, the belt is set at the waistband, the strap is wrapped around the first trouser loop and the second trouser loop of the two trouser legs, and is hung on the belt through a hook. The wearer relies on the coordination of the waist and buttocks muscles. During the hip movement, the waist can also share part of the burden, thereby reducing the pressure of the human body on the knees, helping the wearer to reduce the burden on the legs and the degree of wear on the knees.

[0003] The increasing demand of consumers for additional functions of clothing and the development of intelligent information technology have promoted the development of smart clothing. Textiles embedded with electronic devices have single functions and large size. They are mainly used in medical, military, aerospace and other special fields, and are developing towards good ductility and flexibility. Flexible sensors are worn on the body or attached to the skin to detect human blood pressure, blood sugar, pulse and other physiological parameters, and transmit the data to smart devices for analysis and extraction to provide diagnostic reference for doctors. Wearable technology has broad prospects in the practical application of sports detection and health protection. Existing sports pants are not functionally designed, nor are there mechanisms for monitoring the force of the knee joint. There is an urgent need for sports pants that can monitor the force of the knee joint, have functional area divisions and are beautiful. Summary of the invention:

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and to design a pair of sports pants that can monitor the force on the knee joint and have functional area divisions and are aesthetically pleasing, which are suitable for athletes and middle-aged and elderly people to monitor the force on the knee joint in real time.

[0005] To achieve the above-mentioned purpose, the present invention relates to a pair of knee joint force monitoring sports pants based on flexible sensing, comprising a trouser body and a monitoring unit arranged on the trouser body, the monitoring unit comprising a flexible sensor and a data transmission module, the hip area of ​​the trouser body adopts a heart-shaped arc design, which has the effect of lifting the lifting point and improving the hip shape; the waist and the areas on both sides of the waist are one-piece designed, which has the visual effect of lengthening the legs, weakening the width of the hips, and making the skinnier; the waist area is sewn to the waist and the areas on both sides of the waist and the front piece on the trouser legs; the top edge of the knee area is a smooth arc from 5-9 cm above the inner knee line to 19-23 cm above the outer knee line, The bottom edge is a smooth arc from 3.5-7.5cm below the inner knee line to 8-12cm below the outer knee line. The front top of the knee area is sewn to the front piece of the trouser leg, the back top of the knee area is sewn to the bottom of the hip area, and the bottom of the knee area is sewn to the bottom of the trouser leg. An inner patch pocket is also provided on the inner side of the front end of the knee area, and the outer edge of the inner patch pocket is sewn to the front end of the knee area. The flexible sensor is detachably fixed between the inner patch pocket and the front end of the knee area to monitor the pressure distribution on the knee joint when the human body is in motion. Cloth, the flexible sensor is composed of a strong elastic chemical fiber conductive fabric with a conductive coating, a lead and an oval cloth piece, the lead is located between the oval cloth piece and the strong elastic chemical fiber conductive fabric, the lead is connected to the side of the strong elastic chemical fiber conductive fabric with a conductive coating, the lead is fixedly connected to the oval cloth piece, and the strong elastic chemical fiber conductive fabric is fixedly connected to the oval cloth piece; the flexible sensor is electrically connected to the data transmission module through the lead; the data transmission module is a wired or wireless transmission module, which is used to send the resistance value measured by the flexible sensor to a mobile phone or computer terminal.

[0006] The invention relates to five highly elastic chemical fiber conductive fabrics, which are respectively distributed in the middle and around the oval fabric piece. The leads are flexible conductors, which include independent flexible conductors respectively contacting and connecting with one side of the five highly elastic chemical fiber conductive fabrics with a conductive coating, and a common flexible conductor connecting the five highly elastic chemical fiber conductive fabrics.

[0007] The waist and the areas on both sides of the waist involved in the present invention are made of sweat-absorbing and quick-drying CoolMax fabric; the waist area, the front upper part of the trouser legs, the lower part of the trouser legs and the buttocks area are made of highly elastic, breathable and sweat-absorbent fabric containing 88% polyester fiber and 12% spandex; the knee area is made of a relatively elastic fabric containing 86% nylon and 14% spandex.

[0008] The inner patch pocket involved in the present invention is an oval cloth with a bulging middle and a 4-point design. A 1 / 4 opening is left between the inner patch pocket and the front end of the knee area, which is convenient for putting in and taking out the flexible sensor.

[0009] The present invention also includes a mobile phone or a computer terminal, and the mobile phone or the computer terminal has a data processing program, which can receive the data detected by the flexible sensor through wireless or wired transmission and process and analyze the pressure value.

[0010] The monitoring unit involved in the present invention also includes a micro power supply, which is electrically connected to the data transmission module to provide power for the data transmission module 12 and the flexible sensor.

[0011] The data transmission module and the micro power source of the present invention are detachably fixed on the trouser body through a cloth bag or a shell in the prior art.

[0012] Compared with the prior art, the present invention can achieve good fit between the three-dimensional bending structure of the knee joint of the human body during running and the flexible sensor through the structural design of the inner patch pocket, thereby improving the accuracy of the monitoring data; by optimizing the functional structural design, the wearing comfort of the sports pants is improved while improving the functionality of the sports pants. The sports pants are comfortable to wear, have good breathability, are suitable for wearing during exercise, have broad market prospects, and are environmentally friendly. Description of the drawings:

[0013] Figure 1 It is a schematic diagram of the overall structural principle of the sports pants involved in the present invention.

[0014] Figure 2 The figure is a schematic diagram of the rear structural principle of the sports pants involved in the present invention.

[0015] Figure 3 The figure is a schematic diagram of the structural principle of the flexible sensor involved in the present invention.

[0016] Figure 4This is a schematic diagram of the connection principle between the various structures of the monitoring unit of Example 1 involved in the present invention.

[0017] Figure 5 This is a schematic diagram of the connection principle between the various structures of the monitoring unit of Example 2 involved in the present invention.

[0018] Figure 6 It is a line graph of the vastus lateralis muscle oxygen test experimental results of Example 3 involved in the present invention.

[0019] Figure 7 The present invention relates to a line graph of the vastus medialis muscle oxygen test experimental results of Example 3.

[0020] Figure 8 This is a line graph of the gastrocnemius muscle oxygen test experimental results of Example 3 of the present invention.

[0021] Fig. 9 This is a line graph of the temperature and humidity test results of Example 3 of the present invention. Specific implementation method:

[0022] The present invention is described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0023] Embodiment 1:

[0024] The knee joint force monitoring sports pants based on flexible sensing involved in this embodiment include a trouser body 1 and a monitoring unit arranged on the trouser body 1, the monitoring unit includes a flexible sensor 10 and a data transmission module 12, the hip area 7 of the trouser body 1 adopts a heart-shaped arc design, which has the effect of lifting the lifting point and improving the hip shape; the waist and the areas 4 on both sides of the waist are one-piece designed, using sweat-absorbing and quick-drying CoolMax fabric, which has the visual effect of lengthening the legs, weakening the width of the crotch, and making the visual effect of slimming; the waist area 2 is sewn with the waist and the areas 4 on both sides of the waist and the front piece 5 on the trouser legs, and uses a highly elastic, breathable and sweat-absorbent fabric (the fabric composition is 88% polyester fiber, 1 2% spandex); the top edge of the knee region 3 is designed with a smooth arc connection from 7 cm above the inner knee line to 21 cm above the outer knee line, and the bottom edge is designed with a smooth arc connection from 5.5 cm below the inner knee line to 10 cm below the outer knee line. The knee region 3 uses a relatively elastic fabric (86% nylon, 14% spandex). The front top of the knee region 3 is sewn to the front piece 5 of the trouser leg, the rear top of the knee region 3 is sewn to the bottom of the hip region 7, and the bottom of the knee region 3 is sewn to the bottom 6 of the trouser leg; an inner patch pocket 8 is also provided on the inner side of the front end of the knee region 3, and the inner patch pocket 8 is provided with 4 slits. The outer edge of the inner patch pocket 8 is sewn to the front end of the knee area 3 and a 1 / 4 opening is left at the top to facilitate the placement and removal of the flexible sensor 10; the flexible sensor 10 is detachably sewn and fixed between the inner patch pocket 8 and the front end of the knee area 3 to monitor the pressure distribution on the knee joint of the human body in motion. The flexible sensor 10 consists of 5 strong elastic chemical fiber conductive fabrics 16 with conductive coating, leads 11 and an oval cloth piece 15. The 5 strong elastic chemical fiber conductive fabrics 16 are distributed in the middle and around the oval cloth piece 15. The lead 11 is a flexible wire, which includes Independent flexible wires that are in contact with and connected to one side of five strongly elastic chemical fiber conductive fabrics 16 with a conductive coating, and a common flexible wire that connects the five strongly elastic chemical fiber conductive fabrics 16, a lead 11 is located between the oval cloth piece 15 and the strongly elastic chemical fiber conductive fabric 16, the lead 11 is sewn to the oval cloth piece 15, and the five strongly elastic chemical fiber conductive fabrics 16 are sewn to the oval cloth piece 15 respectively; the flexible sensor 10 is electrically connected to the data transmission module 12 through the lead 11; the data transmission module 12 is a wired or wireless transmission module, which is used to send the resistance value measured by the flexible sensor 10 to a mobile phone or computer terminal.

[0025] This embodiment also includes a mobile phone or a computer terminal. The mobile phone or the computer terminal has a data processing program, which can receive the data detected by the flexible sensor 10 through wireless or wired transmission and process and analyze the pressure value. The user can check the knee pressure condition through the mobile phone or computer at any time.

[0026] The monitoring unit of this embodiment further includes a micro power supply 13 , which is electrically connected to the data transmission module 12 to provide power for the data transmission module 12 and the flexible sensor 10 .

[0027] The data transmission module 12 and the micro power source 13 involved in this embodiment are detachably fixed on the trouser body 1 through a cloth bag or a shell in the prior art.

[0028] The elliptical dimensions of the inner patch pocket 8 of this embodiment are 15.6 cm in the major axis and 15.2 cm in the minor axis.

[0029] The oval cloth piece 15 involved in this embodiment is an oval cloth with darts, and its size and shape are the same as the shape and size of the inner patch pocket 8. The size of the darts 17 of the oval cloth piece 15 is 0.9 cm in width and 5 cm in depth.

[0030] The flexible sensor 10 involved in this embodiment can measure pressure values ​​at five locations, namely, in front of the knee and around the knee.

[0031] The conductive coating involved in this embodiment is a commercially available conductive metal layer or other conductive material coating, and the coating thickness is at the nanometer level.

[0032] In this embodiment, the structure of the sports pants is divided into functional areas, and reasonable dividing lines are designed. Highly elastic, breathable and sweat-absorbent fabrics (88% polyester, 12% spandex) are used in areas with greater muscle vibration (front piece 5 on the trouser legs, lower trouser legs 6, and hip area 7) to improve the wearer's explosive power and freedom of movement. The structural design also ensures good thermal and wet comprehensive performance of the sports pants. In addition to strictly requiring the fiber components of the fabric to have good moisture absorption and easy sweating and quick-drying moisture absorption characteristics, special thermal and wet movement areas for the lower limbs of the human body in the running state are divided (waist area 2 and waist and waist areas 4 on both sides).

[0033] The CoolMax fabric involved in this embodiment has many fine wicking channels with strong capillary effect, and the fiber has a large specific surface area, which can also quickly evaporate the sweat on the surface of the fabric. The sweat discharged by the human body during exercise can be quickly discharged to the outermost layer of the clothing for volatilization, ensuring that the skin is dry and increasing the comfort of the human body. It is suitable for making sportswear.

[0034] The line design principle of the knee area 3 involved in the present embodiment is: during running, the skin in the outer area of ​​the knee stretches more than that in the inner seam area, and is in a stretched state, which is particularly obvious in the outer seam; taking all factors into consideration, although the deformation of the leg skin caused by forward and backward steps is in different directions, the stretching change amplitudes are relatively similar when compared, and the overall longitudinal stretching deformation of the skin at the knee joint is greater than the lateral stretching deformation; therefore, combined with the structural characteristics of the knee joint, targeted line design is carried out for the knee area 3 of the sports pants, which has a certain knee protection effect, and at the same time, according to the comfortable compression threshold of the knee joint, a fabric with greater elasticity is used (the composition of fabric one is 86% nylon and 14% spandex), and it is sewn together with the upper and lower trouser legs.

[0035] This embodiment is designed based on the stretching amount of lower limbs and the distribution of heat and moisture. The two parts of the flexible sensor for protecting knee joint injuries are designed with a heart-shaped arc in structure, which has the effect of raising the lifting point and improving the buttocks; the waist and the two sides of the waist are spliced ​​as one (the waist and the two sides of the waist are designed as one, and spliced ​​with other parts of the pants), which has the visual effect of lengthening the legs, weakening the wide hips, and making the pants look thinner; combined with the characteristics of the knee joint structure, the knee structure of the sports pants is designed with targeted lines; in terms of fabric distribution, considering that the central area of ​​the back waist is one of the main areas where sweat accumulates, in order to discharge sweat in time, this area uses the sweat-absorbing and quick-drying Coolmax fabric. The flexible sensor part for protecting knee joint injuries takes the flexible pressure sensor as the core and the inner pocket of the knee joint of the sports pants as the carrier, which is used to detect the pressure on the knee joint in different running states.

[0036] The flexible sensor involved in this embodiment is installed at the monitored part of the knee joint. Under the action of external force, its elastic fabric produces elastic deformation, causing the flexible sensor fixed on its surface to deform accordingly. After the flexible sensor is deformed, its resistance will increase or decrease, and finally be converted into a digital quantity, and the pressure value is obtained by unit calculation.

[0037] The knee joint force monitoring sports pants based on flexible sensing involved in this embodiment can play a monitoring role for special groups (athletes, middle-aged and elderly people). Through the different pressure values ​​caused by the degree of knee bending, the user's walking status and the knee joint strain problems that are very common among the middle-aged and elderly people can be monitored in real time.

[0038] Embodiment 2:

[0039] The difference between this embodiment and embodiment 1 is that the monitoring unit also includes a microprocessor 14, the flexible sensor 10 is electrically connected to the microprocessor 14 through a flexible wire, the microprocessor 14 is electrically connected to the data transmission module 12, and the microprocessor 14 is electrically connected to the micro power supply 13; the resistance value measured by the flexible sensor 10 is sent to the microprocessor 14, the microprocessor 14 converts the resistance value into a pressure value and sends it to a mobile phone or computer terminal through the data transmission module 12, and the user can check the pressure value on the mobile phone or computer terminal.

[0040] Embodiment 3:

[0041] This example is a systematic evaluation experiment of the knee joint force monitoring sports pants based on flexible sensing in Example 1, and six young women with similar body shapes are selected as subjects. The use of the airbag pressure sensor is to verify the data accuracy of the flexible sensor of the present invention by measuring the clothing pressure data of important measurement points of the human knee joint; muscle oxygen monitoring and temperature and humidity sensor measurements are used to evaluate the fatigue relief and protection, heat dissipation and breathability of the sample clothing.

[0042] 1. Experimental samples:

[0043] There are two pairs of sports pants for the experiment, one of which is the knee joint force monitoring sports pants based on flexible sensing in Example 1, which has a flexible sensor at the knee joint and is easy to remove for washing, and the other is a pair of sports pants without a flexible sensor. The trouser body structure and size of the two sports pants are the same, and the specific sizes are shown in Table 1.

[0044] Table 1 Test sample pants size table

[0045]

[0046] 2. Experimental subjects:

[0047] Six young women were selected, with an average age of 24±2 years old, healthy, and similar body and leg shapes. The basic information of the subjects is shown in Table 2. Before the experiment, the subjects were made to understand the design of the experimental plan, be familiar with the test methods and procedures, and clarify the test indicators and tasks to be completed.

[0048] Table 2 Basic information of subjects

[0049]

[0050] 3. Experimental methods and results

[0051] 3.1 Stress Testing

[0052] The test method is as follows: Step 1: The subject first wears sports pants with flexible sensors. The data transmission module is an output module with a USB interface, which is connected to the computer through the USB interface. The subject completes the relevant actions to obtain the pressure values ​​of each part. During the test, the flexible sensor on the sports pants is connected to the output module through a flexible wire. The output module is connected to the computer through a USB interface. The computer has two built-in programs that match the output module, namely firmwave and gui. Firmwave is the driver and receiving program of the output module, and gui is the data output program; Step 2: The subject wears sports pants without flexible sensors and completes the same actions as step 1. The knee part of the sports pants (the same part as the flexible sensor in step 1) is connected to the AMI3037-5S airbag pressure tester to measure the pressure value of the knee part, which is used to verify the accuracy of the flexible sensor test data. Record the two pressure data and sort them out to obtain Table 3.

[0053] Table 3 Pressure test data verification results

[0054]

[0055]

[0056] It can be seen that the pressure values ​​of the human knee joint measured by the flexible sensor and the pressure values ​​measured by the AMI3037-5S airbag pressure tester are close to each other, indicating that the flexible sensor has high accuracy.

[0057] 3.2 Muscle oxygen test

[0058] During the experimental exercise, Moxy was used to monitor the changes in muscle oxygen saturation (SmO2) and total hemoglobin (THb) of specific muscles of six experimental subjects while they were wearing sample clothes in real time (Moxy is a small, lightweight, wireless real-time monitoring device for aerobic metabolism of muscle tissue. The working principle of the Moxy muscle oxygen monitor is to irradiate the skin with near-infrared light, and then detect the light that enters the muscle tissue and returns to the surface skin to measure the oxygen content in the muscle.); the experimental exercise process is divided into four states: static standing stage (standing still on the treadmill for 5 minutes to allow the experimental subjects to adjust the experimental state), the second stage (5 minutes at a speed of 5km / h, accelerating to 8km / h for 30 minutes), the third stage (decelerating from 8km / h to 5km / h for 5 minutes) and the fourth stage (standing still for 5 minutes). Among them, muscle oxygen saturation (SmO2) mainly refers to the ratio of the concentration of oxygen to hemoglobin in some muscle tissues. It can reflect the oxygen concentration in the muscles. Its changes can reflect the balance of oxygen supply and oxygen utilization in local muscles of the human body to a certain extent. Muscle oxygen changes can be used as an evaluation basis for increasing training intensity, reducing fatigue and improving training effects. Total hemoglobin (THb) represents the total mass of hemoglobin in the circulating blood, and the unit is usually g. It can better reflect the oxygen carrying capacity of the blood. Finally, the data was calculated and sorted to obtain the final results, such as Figure 4-6 shown.

[0059] Depend on Figure 4-6 It can be seen that the changes in muscle oxygen saturation (SmO2) and total hemoglobin (THb) are similar, and the change trends of the three monitored parts are also similar. Among them, the muscle oxygen saturation and total hemoglobin concentration of the gastrocnemius muscle are the highest. When standing still, the two are basically unchanged; in incremental load exercise, the muscle oxygen content and total hemoglobin concentration will show a downward trend with the increase of running speed, but after falling to a certain extent, they will no longer continue to decline, but will gradually recover and return to a relatively stable state; in the third stage of deceleration and the fourth stage of standing still, both quickly recovered and then gradually recovered to a certain level; at the same time, it can be found that the muscle oxygen saturation and total hemoglobin concentration of the three monitored parts after the end of exercise are higher than the level before exercise. Therefore, it shows that muscle oxygen decreases with the increase of exercise load. This is because the sudden contraction of the muscle causes the compression of the blood vessels, and the blood flow in the muscle decreases instantly. At this time, the local arteriovenous oxygen difference will increase, providing oxygen consumption for the exercising muscle. Subsequently, the blood flow of each organ is redistributed, the blood flow of the heart and exercise muscles increases significantly, the oxygen supply increases, and the oxygen saturation of muscle tissue increases, so that the oxygen supply and oxygen consumption are balanced. In the recovery phase of exercise, myoglobin is reoxygenated, and muscle oxygen begins to rise. Figure 3 It can be seen that the recovery speed is very fast, indicating that the sample pants have good fatigue relief performance.

[0060] 3.3 Temperature and humidity test

[0061] The temperature and humidity of various parts of the body surface during exercise are tested using the MSR145. The MSR145 is a small universal data logger used to measure and record different physical measurement parameters. It includes a temperature sensor, a humidity sensor with integrated temperature, a pressure sensor, and a three-axis accelerometer. The measurement parameters can be transferred to a PC after the data recording is completed or during the data recording process. The MSR PC program allows the user to customize the way the MSR145 measures and records data according to their requirements. The test results are shown in Figure 7 As shown in the figure, the surface temperature of the muscles in the three areas changes very steadily during the whole exercise process. From the temperature values, it can be seen that the thermal comfort is good, and there is no sudden overheating or overcooling. In the early stage of the running process, as the exercise load gradually increases, the human body's metabolic activity begins to strengthen, the human heart rate gradually accelerates, the heat production increases, the capillaries expand, and the temperature rises. When a certain period of time is reached, due to the rapid increase in sweating humidity, the evaporation of sweat and the moisture absorption and perspiration of the fabric will take away some heat, and the temperature value begins to drop; at the end of the running, the heart rate has not returned to normal and continues to produce heat, and the human body surface temperature tends to rise. In the second half of the exercise, when the human body sweats a lot, Figure 7 The temperature shows a significant drop, indicating that the sample pants have good moisture permeability and moisture dissipation properties, dissipating a large amount of heat into the air.

Claims

1. A pair of knee joint force monitoring sports pants based on flexible sensing, characterized in that: The trousers include a trouser body and a monitoring unit arranged on the trouser body, wherein the monitoring unit includes a flexible sensor and a data transmission module; the hip area of ​​the trouser body adopts a heart-shaped arc design, which not only includes the hip area, but also includes the bottom of the hip area, and has the effect of lifting the point and improving the hip shape; the waist and the areas on both sides of the waist are one-piece designed, which has the visual effect of lengthening the legs, weakening the width of the hips, and making the skinnier; the waist area is sewn and connected with the waist, the areas on both sides of the waist and the front piece of the trouser legs; the top edge of the knee area is 5 meters from the inner knee line upward -9cm to the smooth arc 19-23cm above the outer knee line, the bottom edge is a smooth arc from 3.5-7.5cm below the inner knee line to 8-12cm below the outer knee line, the front top of the knee area is sewn to the front piece of the trouser leg, the back top of the knee area is sewn to the bottom of the hip area, and the bottom of the knee area is sewn to the bottom of the trouser leg; an inner patch pocket is also provided on the inner side of the front end of the knee area, and the outer edge of the inner patch pocket is sewn to the front end of the knee area; the flexible sensor is detachably fixed to the inner patch The flexible sensor is located between the front end of the bag and the knee area, and is used to monitor the pressure distribution on the knee joint of the human body in motion. The flexible sensor is composed of a strong elastic chemical fiber conductive fabric with a conductive coating, a lead and an oval cloth piece. The lead is located between the oval cloth piece and the strong elastic chemical fiber conductive fabric. The lead is tightly connected to the side of the strong elastic chemical fiber conductive fabric with a conductive coating, the lead is fixedly connected to the oval cloth piece, and the strong elastic chemical fiber conductive fabric is fixedly connected to the oval cloth piece; the flexible sensor is connected to the data transmission module through the lead electrical information; the data transmission module is a wired or wireless transmission module, which is used to send the resistance value measured by the flexible sensor to a mobile phone or computer terminal; the flexible sensor can measure the pressure value in front of the knee and around the knee; the knee joint is monitored in real time by different pressure values ​​caused by the degree of knee joint bending, with high accuracy; the walking state of the user and the very common knee joint strain problem among the middle-aged and elderly people are monitored in real time by different pressure values ​​caused by the degree of knee joint bending; the sports pants have good fatigue relief performance and moisture permeability and moisture discharge performance; The inner patch pocket is an oval fabric with a bulging middle and 4 darts. A 1 / 4 opening is left between the inner patch pocket and the front end of the knee area to facilitate the insertion and removal of the flexible sensor. There are five highly elastic chemical fiber conductive fabrics, which are respectively distributed in the middle and around the oval cloth piece. The leads are flexible wires, which include independent flexible wires respectively contacting and connecting with one side of the five highly elastic chemical fiber conductive fabrics with conductive coatings, and a common flexible wire connecting the five highly elastic chemical fiber conductive fabrics. The oval cloth piece is an oval cloth with darts, and its size and shape are the same as those of the inner patch pocket. The size of the darts of the oval cloth piece is 0.9 cm wide and 5 cm deep. The conductive coating is a conductive metal layer, and the coating thickness is nanometer level. The waist and both sides of the waist are made of sweat-absorbing and quick-drying CoolMax fabric; the waist area, front upper part of the trouser legs, lower trouser legs and hip area are made of highly elastic, breathable and sweat-absorbing fabric containing 88% polyester fiber and 12% spandex; the knee area is made of a more elastic fabric containing 86% nylon and 14% spandex; The monitoring unit also includes a micro power supply, which is electrically connected to the data transmission module to provide power to the data transmission module and the flexible sensor; The data transmission module and the micro power source are detachably fixed on the trouser body through a cloth bag or a shell in the prior art.

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