TWM588789U - Plantar dynamic pressure sensing system - Google Patents

Abstract

The present invention discloses a plantar dynamic pressure sensing system. The aforementioned plantar dynamic pressure sensing system includes a pressure sensing insole, a signal processing device, and a cloud server. The aforementioned pressure sensing insole is placed inside a shoe body and has a signal collector. The pressure sensing insole senses a sole pressure signal of a user, and transmits the sensed sole pressure signal to the signal processing device through the signal collector, and the signal processing device is used to receive the signal sent by the signal collector Pressure information, and upload the pressure information to the cloud server. The cloud server analyzes the user's foot state based on the plantar pressure signal, and then returns it to the signal processing device for user reference.

Description

Plantar dynamic pressure sensing system

The present invention relates to a plantar pressure measurement system, especially a system with dynamic plantar pressure measurement.

With the continuous development of modern technology and medical field, people pay more and more attention to their physical health, and foot health is an indispensable part of overall health. Most people in modern life have a lot of time throughout the day. Wear shoes for activities, and the insole version of the shoes for each person's different foot shape may cause related foot health problems. For example, an unsuitable pad pattern may cause the pressure peak in a specific area of the foot to be too high for a long period of time, causing pain and discomfort in the foot, and may develop a wrong walking posture or gait. Just as blood pressure measurement can reveal physical health problems, by measuring the pressure on the feet of the feet, you can know the health problems such as long and short feet and pelvic tilt.

Therefore, various devices that can measure the pressure of the sole of the human body also came into being. Through this type of device, the pressure distribution of the foot of a subject can be measured and used to analyze and determine the health of the subject's foot or body trunk. However, most of the existing plantar pressure measurement devices mainly measure static measurement data, and the analysis of the static measurement data does not reflect the complete foot-related health of the subject, because the plantar pressure when the human body actually walks The situation may not be the same as the pressure of the plantar when the human body is standing still, and most of the human body's pain and injury are derived from dynamic behavior; the average person's feet are in the daily movement pattern, except for sleeping, showing barefoot relaxation In addition to the state, the other half of the time is the state where the feet are wearing shoes, which may be slippers, sandals, leather shoes, sports shoes...etc., so it is more appropriate to obtain real data with the dynamic situation of walking with feet in shoes. Persuasive. Therefore, how to improve the existing measurement and analysis technology is now an important research direction in related fields.

In view of the above problems, the present invention provides a plantar dynamic pressure sensing system that allows a user to put on the shoe system to measure the dynamic pressure of the plantar, which is used to provide the user with a relevant assessment of the health of his foot reference.

To accomplish the above purpose, the present invention proposes a plantar dynamic pressure sensing system, which includes: A pressure sensing pad is placed at the bottom of the internal space of a shoe. The pressure sensing pad includes: A plurality of pressure sensors, the plurality of pressure sensors are evenly distributed and respectively sense pressure signals generated when a user's foot presses the pressure sensing pad; A transmission line connected to each of the pressure sensors; and A signal collector is electrically connected to the pressure sensing pad through the transmission line, and receives the pressure signal sensed by the pressure sensing pad; A signal processing device is wirelessly connected to the signal collector, receives the pressure signal sensed by the pressure sensing pad from the signal collector, and integrates the pressure signal sensed by the pressure sensing pad into a sole pressure Signal; and A cloud server is connected to the signal processing device to receive the plantar pressure signal, and after analyzing the user's foot state based on the plantar pressure signal, a foot state signal is generated and the foot state is returned Signal to the signal processing device.

The present invention measures the user's dynamic or static foot pressure measurement and further analyzes and evaluates the user's related foot health problems through the measurement data. The present invention improves the related dynamic foot pressure sensing technology that is lacking in the previous technology, so that the user can obtain a more in-depth foot health analysis effect than the previous related examination technology when using the new knowledge system for foot health examination.

Please refer to FIG. 1. The new plantar dynamic pressure sensing system includes a pressure sensing pad 20, a signal processing device 30 and a cloud server 40. As shown in FIGS. 2 and 3, the pressure sensing pad 20 is disposed inside a shoe 50. Preferably, the pressure sensing pad 20 is placed under a shoe pad 51.

Please further refer to FIG. 3. The pressure sensing pad 20 includes a plurality of pressure sensors 21, a transmission line 22, and a signal collector 23. The pressure sensor 21 can generate a pressure signal when pressed. As shown in FIG. 2, the pressure sensing pad 20 is fixed between the inner bottom surface 501 of the inner space of the shoe 50 and the insole 51. In a preferred embodiment, the pressure-sensing pad 20 is extremely thin, so the user does not feel a raised foreign body sensation when walking, allowing the user to walk normally without being disturbed It is used to measure the dynamic plantar pressure information to obtain the most suitable pressure data. The preferred distribution positions of the plurality of pressure sensors 21 are located in the toe, forefoot, midfoot and heel areas of the corresponding foot to obtain pressure signals in the different areas. The signal collector 23 is electrically connected to the pressure sensing pad 20 through the transmission line 22. The signal collector 23 includes a storage unit 231 and a wireless unit 232. The signal collector 23 stores the sensed pressure signal to the internal storage unit 231, and transmits the stored pressure signal to the external signal receiving device 30 by wireless transmission through the wireless unit 232, where the wireless transmission method can be Including wireless transmission technologies such as Bluetooth, WIFI and RFID. In addition, the signal receiving device 30 may be a person holding a mobile device, such as a smart phone, a tablet computer, a notebook computer, and so on. At the same time, the signal receiving device 30 can install a human terminal application 31, which can convert the received pressure signal into the actual pressure value to integrate into a plantar pressure signal, and upload the plantar pressure signal to the cloud server 40, After the cloud server 40 analyzes the foot state of the user based on the plantar pressure signal, a foot state signal is generated, and then the cloud server 40 returns the foot state signal to the signal processing device 30. The signal processing device 30 presents relevant data information according to the foot state signal for the user's reference. Preferably, the signal processing device 30 is connected to the cloud server 40 via a network.

The signal collector 23 is electrically connected to the pressure sensing pad 20 through the transmission line 22. The signal collector 23 includes a storage unit 231 and a wireless unit 232. The signal collector 23 stores the sensed pressure signal to an internal storage unit 231, and transmits the stored pressure signal to the signal processing device 30 through the wireless unit 232 through a wireless transmission method. The wireless transmission method here may include blue In the preferred embodiment, wireless transmission technologies such as Bud, WIFI, RFID, etc., the signal collector 23 has a built-in battery holder to provide power and the user to replace the battery when required.

Please refer to FIG. 4, when a user puts on a shoe system equipped with the foot dynamic pressure sensing shoe system and starts to walk, the pressure sensing pad 20 detects the pressure applied by the received foot through the pressure sensor 21 Pressure and transmit the detected pressure signal to the signal collector 23 through the transmission line 22. The signal collector 23 transmits the pressure signal information to the signal processing device 30 through wireless communication methods such as Bluetooth, WIFI, and RFID. The signal processing device 30 receives the aforementioned pressure signal information and uses the personal terminal application 31 for processing, converts the received pressure signal into the actual pressure value to integrate into the plantar pressure signal, and uploads the plantar pressure signal To the cloud server 40.

Then, the cloud server 40 analyzes the user's foot state according to the plantar pressure signal, generates a foot state signal, and then returns the foot state signal to the signal processing device 30, and the signal processing device 30 presents an analysis result based on the foot status signal and displays it on a display screen to provide the user-related assessment. In addition, the signal processing device 30 can download the personal terminal application 31 and the version update to the cloud server 40 via the network, and the cloud server 40 can retain the analysis results for saving data for future reference .

The following example illustrates how to process the measured dynamic pressure data of the plantar above to provide an objective assessment of the health of the plantar or body. When a user puts on a shoe equipped with the shoe dynamic pressure sensing shoe system and starts walking. Measure the user to take a straight walk and get an average stride of the user during the walk (average the distance spanned by each step, the calculation method is the total distance of the straight walk divided by the user The total number of steps); and to obtain an average stride frequency of the user during the trip (on average a few steps per minute). The average stride and the average stride frequency of the user can be used by relevant personnel to assess the possible foot health of the user. For example, when the average stride of the user is lower than a certain value, the user is It is estimated that there is a problem of insufficient muscle strength related to the foot, so it is recommended to consume protein nutritional supplements such as whey protein and cooperate with the training of related foot muscle groups. And in the preferred embodiment, the average stride and average stride frequency data of a user are uploaded via the personal terminal program 31 and stored in the cloud server 40 to provide long-term continuous footstep tracking Based on the change trend of the two data, the user's foot condition is further evaluated, and relevant personnel are given corresponding suggestions to the user.

，測量該足中區域B之內的所有壓力感測器之壓力總和得到一足中區域壓力總和

，另外再測量該足前區域C之內的所有壓力感測器之壓力總和得到一足前區域壓力總和

，根據

可以得到一足弓指標，該足弓指標為該足中區域壓力總和

除以所有壓力感測器之壓力總和，亦即該足弓指標等於： The following example illustrates how to process the measured dynamic pressure data of the plantar above to provide an objective assessment of the health of the plantar or body. Please refer to FIG. 5, the sensing area of the pressure sensing insole includes a heel area A, a midfoot area B, and a forefoot area C. The total pressure of all pressure sensors in the heel area A is measured to obtain a heel Regional pressure sum

, Measure the pressure sum of all pressure sensors in the mid-foot area B to get the total pressure of the mid-foot area

, And then measure the pressure sum of all pressure sensors in the forefoot area C to get the total pressure in the forefoot area

,according to

An index of the arch of the foot can be obtained, which is the sum of the pressures in the area

Divided by the total pressure of all pressure sensors, that is, the arch index is equal to:

If the value of the arch index is greater than 0.26, the subject's foot may be flat feet; if the value of the arch index is less than 0.21, the subject's foot may be high arch; if the value of the arch index Between 0.21 and 0.26, the subject's foot may be normal. The above judgment result is only a risk assessment result, which is only for the user's reference, and it cannot be concluded that the subject must have the problem.

，再將該受測者左腳透過左腳壓力感測鞋墊所測得之全部壓力相加得到一左腳足部壓力總和

，進一步取得一右腳足部壓力總和

之佔重比例，亦即該右腳足部壓力總和

之佔重比例等於： The plantar pressure data can also be used to evaluate the balance of the subject's overall lower extremity, pelvis, and trunk. For example, the pressure-sensing insole is provided inside a right-foot shoe body to sense the right-foot pressure signal generated when the subject presses the right-foot pressure-sensing insole, and the dynamic pressure of the sole The sensing system further includes a left foot pressure sensing insole for being disposed inside a left foot shoe body, and the structure of the left foot pressure sensing insole is the same as that of the pressure sensing insole, so it will not be described in detail. The cloud server 40 can add all the pressure measured by the right foot of the subject through the pressure sensing insole to obtain a total pressure of the right foot

, And then add the total pressure measured by the left foot of the subject through the left foot pressure sensing insole to obtain a total pressure of the left foot

To further obtain a total pressure of the right foot

The proportion of weight, that is, the total pressure of the right foot

The weight ratio is equal to:

之佔重比例，亦即該左腳足部壓力總和

之佔重比例等於： Also get the total pressure of the left foot

The proportion of weight, that is, the total pressure of the left foot

The weight ratio is equal to:

之佔重比例、以及該左腳足部壓力總和

之佔重比例是由該雲端伺服器40計算的。 If the proportion of the total pressure of the left and right feet differs by more than 10%, the subject may be at risk of pelvic tilt; if the difference in the proportion of the total weight of the left and right feet falls within 5 % To 10%, the subject may have long and short feet; if the difference in the proportion of the total foot pressure of the left and right feet falls within 5%, the subject should be considered to have no relevant pelvis Tilt or long and short feet. In this preferred embodiment, the total arch index and the total pressure of the right foot

The proportion of weight and the total pressure of the left foot

The weight ratio is calculated by the cloud server 40.

The following is another example of how to use the dynamic pressure sensing system to perform gait stability test: measure the user to walk back and forth on a straight walk, and measure the pressure data of each step of the right foot (or left foot) during the back and forth walk, The coordinates of the center of gravity of the step corresponding to the return stroke are compared to evaluate the gait stability of the user.

，以及回程中的第n步的重心座標為

，

分別為一平面之二維座標，可得一步計算得一步態穩定性評估指標為： In a preferred embodiment, the user walks back and forth on a given straight L meter trail. After measuring the pressure data, a total of N steps have been taken, an evaluation trip has taken N/2 steps, and a return trip has taken N/2 steps. Step, deducting the first two steps of the trip (starting acceleration) and stopping the first two steps (starting deceleration), and only extracting the calculation of the number of steps at a stable speed. The center of gravity of the nth step in the trip is calculated as

, And the coordinate of the center of gravity of the nth step in the return trip is

,

The two-dimensional coordinates of a plane are obtained in one step, and the one-step stability evaluation index is:

If the value of the gait stability index is closer to 0, the more stable; if the value of the gait stability index is greater than 0.2~0.4, the subject's gait stability is not good; if the value of the gait stability index is higher than 0.4 Above, the subject's gait is more unstable and it is recommended to see a doctor.

去程 1     2     3 4 40 4 4 50 5     6     回程 7     8     9 2 40 10 3 30 11     12     For example, the user walked 12 steps on a given 6-meter trail, so he evaluated 6 steps on the outbound trip, 6 steps on the return trip, and applied the pressure of step 3 (that is, step 3 of the trip) The center of gravity coordinates of the outgoing step 3 and the pressure information of step 9 (that is, the third step of the return trip) calculated by the information calculation are taken as the square of the distance; the step 4 (ie The center of gravity coordinates calculated from the pressure information of step 4 of the outbound trip) and step 10 (step 4 of the return trip) are squared from the distance. As shown in the following table: Step count

Outbound 1 2 3 4 40 4 4 50 5 6 Return trip 7 8 9 2 40 10 3 30 11 12

Among them, the number of steps of the stable speed after the first two steps and the last two steps are removed first, and after calculation, the coordinates of the center of gravity of the third step in the trip are:

The center of gravity coordinates of step 3 (ie step 9) in the return trip are:

The coordinates of the center of gravity of the fourth step in the trip are:

The center of gravity coordinates of step 4 (ie step 10) in the return trip are:

Therefore, the gait stability evaluation index is:

，以及回程中的第n步的重心座標為

，

分別為一平面之二維座標，可得一步計算得一步態穩定性評估參數為： In another preferred embodiment, the user walks back and forth on a given straight L meter trail. After measuring the pressure data, a total of N steps are taken, deducting the first two steps of the trip (starting acceleration) and the first two steps of stopping (Start deceleration), only the coordinates of the center of gravity of the nth step in the outgoing stroke are calculated as the number of steps at a stable speed is

, And the coordinate of the center of gravity of the nth step in the return trip is

,

Respectively, the two-dimensional coordinates of a plane can be calculated in one step, and the evaluation parameters of one-step stability are:

among:

1             2             3 1 4 40 160 16 1600 4 2 4 50 200 16 2500 5 3 6 50 300 36 2500 6 4 5 60 300 25 3600 7 5 3 40 120 9 1600 8 6 6 60 360 36 3600 9 7 2 40 80 4 1600 10 8 3 30 90 9 900 11             12             總和 33 370 1610 151 17900 For example, the user walked back and forth on a given straight 12-meter walk. After measuring the pressure data, a total of 12 steps were taken, deducting the first two steps of the trip (starting acceleration) and the first two steps of stopping (starting deceleration). Only extract the number of steps of stable speed, as shown in the following table:

1 2 3 1 4 40 160 16 1600 4 2 4 50 200 16 2500 5 3 6 50 300 36 2500 6 4 5 60 300 25 3600 7 5 3 40 120 9 1600 8 6 6 60 360 36 3600 9 7 2 40 80 4 1600 10 8 3 30 90 9 900 11 12 sum 33 370 1610 151 17900

，估算該使用者之步態穩定性評估參數

為： Bring the pressure value of all effective steps into

, Estimate the user's gait stability evaluation parameters

for:

among:

In summary, if the user further measures the center of gravity of the user's sole pressure through the dynamic pressure sensing system on a given L-meter trail, the measurement method is to measure the user's left and right feet The sole pressure signal of the sole is used to calculate the center of gravity coordinates. If the center of gravity of the user's sole is medial (that is, the center of gravity of the sole is closer to the inner side of the sole), the relevant personnel will combine other data to measure the results (such as Flat feet and other issues) put forward the user's shoe purchase policy, for example, users with inward center of gravity of the sole are recommended to choose shoes with supporting functions to reduce the area of the foot or body trunk due to the inward center of gravity And the probability of injury; for users with out-of-center gravity of the sole, it is recommended to choose shoes with shock absorption function to reduce the chance of injury to the foot or body trunk area due to out-of-gravity.

‧‧‧足跟區域壓力總和

‧‧‧足中區域壓力總和

‧‧‧足前區域壓力總和

‧‧‧右腳足部壓力總和

‧‧‧左腳足部壓力總和 100‧‧‧Foot dynamic pressure sensing system 20‧‧‧Pressure sensing insole 21‧‧‧Pressure sensor 22‧‧‧ Transmission line 23‧‧‧Signal collector 231‧‧‧Storage unit 232‧‧‧Wireless Unit 30 ‧‧‧ signal processing device 31 ‧‧‧ personal terminal application 40 ‧ ‧ ‧ cloud server A ‧ ‧ ‧ heel area B ‧ ‧ ‧ midfoot area C ‧ ‧ ‧ forefoot area

‧‧‧ Total heel pressure

‧‧‧ Total pressure in the midfoot area

‧‧‧ Total pressure in the forefoot area

‧‧‧Total pressure of right foot

‧‧‧ Sum of left foot pressure

Figure 1: Architecture diagram of the plantar dynamic pressure sensing system. Figure 2: A schematic cross-sectional view of a shoe applied in conjunction with the plantar dynamic pressure sensing system. Figure 3: Structure diagram of the pressure sensing pad. Figure 4: Schematic diagram of the plantar dynamic pressure sensing system. Figure 5: Schematic diagram of the area definition of the pressure sensing pad.

100‧‧‧Foot dynamic pressure sensing system

20‧‧‧Pressure sensing pad

21‧‧‧ pressure sensor

22‧‧‧Transmission line

23‧‧‧Signal Collector

30‧‧‧Signal processing device

31‧‧‧Personal terminal application

40‧‧‧ cloud server

Claims (10)

A plantar dynamic pressure sensing system, including: A pressure sensing pad is provided for being arranged inside a shoe body. The pressure sensing pad includes: A plurality of pressure sensors, the plurality of pressure sensors are evenly distributed and respectively sense pressure signals generated when a user's foot presses the pressure sensing pad; A transmission line connected to each of the pressure sensors; and A signal collector is electrically connected to the pressure sensing pad through the transmission line, and receives the pressure signal sensed by the pressure sensing pad; A signal processing device is wirelessly connected to the signal collector, receives the pressure signal sensed by the pressure sensing pad from the signal collector, and integrates the pressure signal sensed by the pressure sensing pad into a sole pressure Signal; and A cloud server is connected to the signal processing device to receive the plantar pressure signal, and after analyzing the user's foot state based on the plantar pressure signal, a foot state signal is generated and the foot state is returned Signal to the signal processing device. The plantar dynamic pressure sensing system according to claim 1, wherein the signal processing device is a handheld mobile device. The plantar dynamic pressure sensing system according to claim 1, wherein an application program is installed in the signal processing device, the application program processes and analyzes the pressure signal, and converts the received pressure signal into the actual pressure value to Integrate into a plantar pressure signal, and upload the plantar pressure signal to the cloud server. The plantar dynamic pressure sensing system according to claim 1, wherein the signal collector includes: A storage unit stores the pressure signal. The plantar dynamic pressure sensing system according to claim 1, wherein the signal collector includes: A wireless unit; wherein the signal receiver wirelessly transmits the pressure signal to the signal processing device through the wireless unit. The plantar dynamic pressure sensing system according to claim 1, wherein the pressure sensing insole includes: a heel area; a midfoot area; and a forefoot area; wherein the cloud server will be located in the heel area pressure of the summed signal of the plurality of pressure sensors to obtain the sum of a heel region of the pressure P _a; the pressure of the bits in the cloud server midfoot region of the plurality of pressure sensors of the summed signal Obtain the pressure sum P _B in the mid-foot area; where the cloud server adds the pressure signals of the plurality of pressure sensors located in the fore-foot area to obtain the pressure sum P _{C in the} pre-foot area; wherein the cloud server The device will further calculate the value of the index of a foot arch, which is:

. The plantar dynamic pressure sensing system according to claim 1, further comprising: a left foot pressure sensing pad for being disposed inside a left foot shoe body, the left foot pressure sensing pad including: a plurality of pressures Sensors, the plurality of pressure sensors are evenly distributed and respectively sense the left foot pressure signal generated when a user's foot presses the left foot pressure sensing pad; a transmission line is connected to each of the pressure sensors And a signal collector, which is electrically connected to the left foot pressure sensing pad through the transmission line and receives the left foot pressure signal sensed by the left foot pressure sensing pad; wherein the pressure sensing insole is provided for setting Inside a right foot shoe body, and the pressure signal generated by the plurality of pressure sensors of the pressure sensing insole is a right foot pressure signal; wherein the signal processing device is further wirelessly connected to the left foot pressure sensing pad The signal collector of the receiver receives the left foot pressure signal sent by the signal collector of the left foot pressure sensing pad, and integrates the left foot pressure signal into a left foot sole pressure signal, and uploads the left foot sole pressure signal To the cloud server; wherein the cloud server adds all the pressures measured by the pressure sensing insole according to the right foot pressure signal to obtain a total right foot pressure

, And then add all the pressures measured by the left foot pressure sensing insole according to the left foot pressure signal to obtain a left foot foot pressure sum

, And further calculated to obtain the total pressure of the right foot

The proportion of the weight, the total pressure of the right foot

The proportion is:

. The plantar dynamic pressure sensing system according to claim 7, wherein the cloud server further calculates a total pressure of the left foot

The proportion of weight, that is, the total pressure of the left foot

The proportion is:

. The plantar dynamic pressure sensing system according to claim 1, wherein the cloud server calculates a plurality of center-of-gravity coordinates based on the plantar pressure signal; wherein the center-of-gravity coordinates include a step n-th go center of gravity coordinate

And the center of gravity of the return nth step

, N is a positive integer; where the cloud server further calculates the one-step stability evaluation index as:

. The plantar dynamic pressure sensing system according to claim 1, wherein the cloud server calculates a plurality of center-of-gravity coordinates based on the plantar pressure signal; wherein the center-of-gravity coordinates include n center-of-gravity coordinates

, N is a positive integer, and

; Where the cloud server calculates one-step stability evaluation parameters in a further step

for:

; among them:

;

;

.

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