CN113907745A - System for resistance value conversion plantar pressure value - Google Patents
System for resistance value conversion plantar pressure value Download PDFInfo
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- CN113907745A CN113907745A CN202111201862.7A CN202111201862A CN113907745A CN 113907745 A CN113907745 A CN 113907745A CN 202111201862 A CN202111201862 A CN 202111201862A CN 113907745 A CN113907745 A CN 113907745A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/1036—Measuring load distribution, e.g. podologic studies
- A61B5/1038—Measuring plantar pressure during gait
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
Abstract
The invention discloses a system for converting a plantar pressure value by a resistance value, which comprises: the first terminal is configured for sensing each point pressure of the sole, forming each point resistance value in a linear relation with the sensed each point pressure, and converting each point resistance value into each point pressure value; the data interaction module is configured for realizing data interaction; the second terminal is configured to be connected with the first terminal through the data interaction module to acquire each point pressure value; the second terminal performs the following processing on the pressure value of each point: 1) calculating the average value of the pressure sum of each point under the time point; 2) calculating the deviation value and the sum deviation value of each point; 3) and calculating the pressure percentage of the target area of the sole in a time range and the deviation percentage of the pressure of the left foot and the right foot in the time range. The system processes the result to facilitate data analysis, and the data can be provided to other devices for further analysis or storage, and can also be provided to relevant personnel for analysis.
Description
Technical Field
The invention relates to a system for converting a plantar pressure value by a resistance value.
Background
The feet are the roots of standing and moving, the foot pressure is unstable, the roots are not firm, the patients suffer endless after suffering, the foot health is closely related to the health of the feet, the lower limbs and the spine, the foot health is closely related to the growth and development of infants, and the stress of hip joints and the spine is closely related to the health of the feet, the capability of moving and the endurance of the children. The foot is the main bearing part of the human body, and the normal heel and instep form an arch of foot through ligaments and joints, so that the foot has better elasticity, can buffer the impact and the shock of external force, and also plays a role in protecting the nerves of the sole of the foot during walking.
Therefore, the sole pressure has a crucial auxiliary analysis function for analyzing the health state of the human body, and has important significance for acquiring sole data.
Disclosure of Invention
The invention aims to provide a system for converting a plantar pressure value by a resistance value, which senses plantar pressure and obtains a corresponding pressure value, and then processes the pressure value, so that the processing result is convenient for data analysis.
The system for converting the plantar pressure value by the resistance value comprises the following components:
the first terminal is configured for sensing each point pressure of the sole, forming each point resistance value in a linear relation with the sensed each point pressure, and converting each point resistance value into each point pressure value;
the data interaction module is configured for realizing data interaction; and
the second terminal is configured to be connected with the first terminal through the data interaction module to acquire each point pressure value;
the second terminal performs the following processing on the pressure value of each point:
1) calculating the average value of the pressure sum of each point under the time point;
2) calculating the deviation value and the sum deviation value of each point;
3) and calculating the pressure percentage of the target area of the sole in a time range and the deviation percentage of the pressure of the left foot and the right foot in the time range.
In some embodiments, the first terminal comprises:
the data acquisition module is configured for sensing pressure of each point on the sole and respectively outputting electric quantity of each point in a linear relation with the sensed pressure of each point;
and the data processing module is configured to be connected with the data acquisition module, convert each point electric quantity into a corresponding point resistance value, and convert each point resistance value into a corresponding point pressure value.
In some embodiments, the first terminal comprises:
the data acquisition module is configured for sensing pressure of each point on the sole and respectively outputting resistance values of each point in a linear relation with the sensed pressure of each point;
and the data processing module is configured to be connected with the data acquisition module and convert each point resistance value into each point pressure value.
In some embodiments, the first terminal further includes a wake-up detection module configured to be connected to the data processing module for waking up the data processing module.
In some embodiments, the system provided herein further comprises a power module configured as a button lithium battery.
In some embodiments, the button lithium battery is a rechargeable lithium battery, and the power supply module further includes a charging circuit for charging the button lithium battery.
In some embodiments, the total deviation value is calculated by the following formula:
g = (g left-g right)/g left 100 (1)
g = (g right-g left)/g right 100 (2)
In the formula: g is the deviation percentage of the total target point position of the sole; g, the right is the sum of the point position pressure values of the single right foot sole target points; and g, left is the sum of the point position pressure values of the single left foot sole target points.
In some embodiments, the percentage of pressure in the plantar target region over time is calculated by the following equation:
g’=g1+g2+....+gn/gsum*100 （3）
in the formula: g' is the percentage of pressure in the target area of the sole of the foot; g1, g2 and gn are point position pressure values in the target area of the sole, and n is a point position value of the target area; gsum is the sum of the left and right pressure values of the left/right foot sole target point in the time range.
In some embodiments, the percentage of left and right foot pressure deviations over the time frame is calculated by the following equation:
g left = (gsum left-gsum right)/gsum left 100 (4)
g Right =100-g left (5)
In the formula: g left is left foot pressure deviation percentage; g right is the pressure deviation percentage of the right foot; and the left part of gsum is the pressure value sum of the target point positions of the sole of the left foot in the time range, and the right part of gsum is the pressure value sum of the target point positions of the sole of the right foot in the time range.
In some embodiments, the second terminal forms a pressure trend graph after calculating an average value of the sum of the pressures at each site at the time point; calculating the deviation value and the sum deviation value of each point location to form a deviation graph; and (4) calculating the pressure percentage of the target area of the sole in the time range and the deviation percentage of the pressure of the left foot and the right foot in the time range to form a pressure distribution map.
By adopting the technical scheme of the invention, the achievable technical scheme is at least as follows:
1) the system senses pressure of each point of the sole through the first terminal, forms pressure values of each point, and then calculates and processes the average value, the deviation value, the pressure percentage of the sole target area in the time range and the pressure deviation percentage of the left foot and the right foot of each point through the second terminal, and the processing result is convenient for data analysis. The data can be provided to other devices for further analysis or storage, and can also be provided to relevant personnel for analysis, such as medical personnel, as data for assisting medical personnel in the diagnosis and treatment process.
2) The algorithm of the invention has lower complexity, and the processed data can be directly used.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1 is a block diagram of the system provided by the present invention;
FIG. 2 shows the resistance values of the present invention
Calculating a schematic diagram;
FIG. 3 is a schematic circuit diagram of a data processing module according to the present invention;
FIG. 4 is a schematic circuit diagram of a wake-up detection module according to the present invention;
FIG. 5 is a schematic circuit diagram of a Bluetooth module provided in the present invention;
FIG. 6 is a schematic circuit diagram of a Micro USB interface module according to the present invention;
FIG. 7 is a schematic circuit diagram of a power supply module provided in the present invention;
FIG. 8 is a schematic view of the construction of an insole provided by the present invention;
FIG. 9 is a graph of resistance versus pressure;
in the drawings: 1-insole body, 2-data acquisition module; the pins labeled Sen 0-Sen 7 in FIG. 2 are shown connected to the pressure sensor; the numbers in the circles in fig. 7 represent the numbers of the pressure sensors.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.
The invention provides a system for converting a plantar pressure value by a resistance value, which aims to acquire plantar pressure and express the pressure in the form of a pressure value. Referring to fig. 1, the system includes a first terminal, a data interaction module, a power supply module, and a second terminal.
The first terminal is configured for sensing each point pressure of the sole, forming each point resistance value in a linear relation with the sensed each point pressure, and converting each point resistance value into each point pressure value; the first terminal is of an insole structure, and as shown in fig. 8, the insole includes an insole body 1, the insole body 1 is configured to be disposed in a circuit, the circuit senses pressure of each point on the sole of a foot, forms a resistance value of each point in a linear relation with the sensed pressure of each point, and converts the resistance value of each point into a pressure value of each point. Of course, it is to be understood that the insole construction is only one manifestation of the first end of the present application and is not intended to be limiting; the first terminal may take on other manifestations than insole construction, such as a PCB board.
The first terminal has the following two structures:
a first structure comprising:
the data acquisition module is configured for sensing pressure of each point on the sole and respectively outputting electric quantity of each point in a linear relation with the sensed pressure of each point;
the data processing module is configured to be connected with the data acquisition module, converts each point position electric quantity into a corresponding point position resistance value, and converts each point position resistance value into a point position pressure value;
and the awakening detection module is connected with the data processing module and is configured for awakening the data processing module.
In the structure, the data acquisition module adopts a piezoelectric sensor and is used for sensing the pressure of the sole of a foot and outputting electric quantity in direct proportion to the pressure. When the piezoelectric sensor receives external force, the surface of the piezoelectric sensor generates charges, and the charges are amplified and transformed into electric quantity in direct proportion to the external force applied to the piezoelectric sensor through a charge amplifier and a measuring circuit integrated in the piezoelectric sensor.
A second structure, comprising:
the data acquisition module is configured for sensing pressure of each point on the sole and respectively outputting resistance values of each point in a linear relation with the sensed pressure of each point;
the data processing module is configured to be connected with the data acquisition module and convert each point resistance value into each point pressure value;
and the awakening detection module is connected with the data processing module and is configured for awakening the data processing module.
In the structure, the data acquisition module adopts a resistance strain sensor and is used for sensing the pressure of the sole of a foot and outputting a resistance value corresponding to the pressure. When the resistance strain sensor is subjected to external force, the deformation of the metal conductor inside the resistance strain sensor is converted into resistance change, and the specific change is as follows: the metal conductor is subjected to axial tension, the length of the metal conductor is increased, the cross-sectional area of the metal conductor is reduced, the resistance is increased, and conversely, the resistance is reduced. The resistance strain sensor outputs a resistance value under the action of an external force.
The data processing module in the first structure and the second structure comprises a singlechip U2 for storing a computer program which is programmed and debugged successfully by C language and executing the computer program, and when the computer program is executed, the resistance value of the piezoelectric sensor is realized
Calculating, namely obtaining a pressure value according to the resistance value, namely converting the resistance value into the pressure value; or directly converting the resistance value into the pressure value when the computer program is executed.
The relationship between the resistance value and the pressure value is shown in fig. 9.
Wherein the resistance value
Referring to fig. 2, the single chip microcomputer is matched with a pull-up resistor R1, one end of the resistor R1 is connected to a circuit power VCC, and the other end is connected to a pin connecting the single chip microcomputer and the resistor R1, and the electric quantity output by the piezoelectric sensor of the single chip microcomputer is input to the single chip microcomputer. When the piezoelectric sensor is acted by external force, it can produce electric quantity which is directly proportional to the external force, and said electric quantity can be inputted into single-chip computer, and under the action of resistor R1 the resistance value of piezoelectric sensor can be used
The following relationship is satisfied:
wherein:
is a power supply of the circuit and is provided with a power supply,
the data is the ADC data of the singlechip.
The single chip microcomputer is not limited to a specific single chip microcomputer or a series of single chip microcomputers, and can store and execute a computer program, such as an AT89C52 single chip microcomputer, an STC series single chip microcomputer, an ATM series single chip microcomputer, and the like.
Referring to fig. 3, an STM32 series single chip microcomputer is adopted as a single chip microcomputer U2, and peripheral circuits of the single chip microcomputer U2 include an inductor L1, a capacitor C3, a capacitor C4, a resistor R1, a resistor R4, a capacitor C6, an inductor L2, a capacitor C7, a capacitor C8 and a capacitor C5; the circuit power supply VDD _ BAT outputs a working voltage MCU _3V of the singlechip U2 after passing through an inductor L1, and the working voltage MCU _3V is loaded on a power supply pin of the singlechip U2, and a capacitor C3 and a capacitor C4 are used for filtering the output of the inductor L1, so that the voltage loaded on the power supply pin of the singlechip U2 is stable.
The voltage MCU _3V output by the inductor L1 is input into an NRST pin of the singlechip U2 through a resistor R4 and is grounded through a capacitor C8; the voltage MCU _3V also forms a VDDA power supply after passing through an inductor L2, the VDDA power supply is configured and loaded on a VDDA pin of the singlechip U2, and the VDDA power supply is grounded through a capacitor C7; the output of the piezoelectric sensor/resistance strain sensor is input into the singlechip U2 through a resistor, and pins of the singlechip U2 for loading the output of the piezoelectric sensor/resistance strain sensor are also connected with a VDDA power supply through pull-up resistors respectively. The number of the resistors is matched with the number of pins loaded by the single chip microcomputer U2 serving as the output of the piezoelectric sensor/resistance strain sensor, and if 8 piezoelectric sensors/resistance strain sensors are distributed, 8 resistors are correspondingly distributed. Referring to fig. 3, a resistor R6 to a resistor R8, and a resistor R13 to a resistor R17 are set as pull-up resistors, respectively. The capacitor C8\ C5 is used for filtering, and the resistor R1 is connected in series between the starting selection pin BOOT1 of the singlechip U2 and the circuit ground and is used for providing a starting signal of the singlechip U2.
The wake-up detection module herein is used to wake up the single chip microcomputer U2 when the data acquisition module has an output, so that the single chip microcomputer U2 executes the computer program stored therein. Referring to fig. 4, the wake-up detection module used herein includes a comparator U4, a resistor R20, a resistor R24, and a capacitor C13, wherein the resistor R20 and the resistor R24 are connected in series between a circuit power supply VDD _ BAT and a circuit ground to form a voltage dividing circuit, provide a voltage threshold, and input the voltage threshold to an inverting input terminal of the comparator U4, a non-inverting input terminal of the comparator U4 is connected to the single chip microcomputer U2, and an output terminal is connected to the single chip microcomputer U2 directly or through a resistor R19; the capacitor C13 is used for filtering.
The working principle of the wake-up detection module is as follows: when external force acts on the data acquisition module, the data acquisition module has output which is input into the singlechip U2, and the singlechip U2 has output which is input into the non-inverting input end of the comparator U4 through the diode D1/the diode D2; depending on the setting, when the comparator U4 signal at the non-inverting input is greater or less than the signal at the inverting input, there is an output that is input to the single chip U2, causing the single chip U2 to run the stored computer program.
The power supply module in the present document adopts one of the following circuit structures:
1) the chip is configured with a chip for processing a power supply VDD _5V, a transient suppression diode D3, a capacitor C9, a capacitor C10, a resistor R12, a capacitor C11, a resistor R11 and a capacitor C12, wherein the transient suppression diode D3, the capacitor C9 and the capacitor C10 are connected between an input pin of the chip and a circuit ground in parallel; the resistor R12 is connected between the chip input pin and the enable pin, one end of the resistor R11 is connected with the chip output pin, and the other end of the resistor R11 is used as an output end output circuit power supply VDD _ BAT to provide working voltage for the piezoelectric sensor/resistance strain sensor, the single chip microcomputer, the awakening detection module and the data interaction module; the capacitor C11 is connected between the end of the resistor R11 connected to the chip output pin and circuit ground, and the capacitor C12 is connected between the end of the resistor R11 serving as the output terminal and circuit ground.
The output of the charging chip is directly provided for the piezoelectric sensor/resistance strain sensor, the single chip microcomputer, the awakening detection module and the data interaction module. In other embodiments, the chip is a voltage stabilization chip.
2) The power supply module is configured as a button lithium battery J2.
3) The power supply module is configured as a button lithium battery J2 configured as a rechargeable button lithium battery; referring to fig. 7, the power supply module is further configured with a charging chip U3, a transient suppression diode D3, a capacitor C9, a capacitor C10, a resistor R12, a capacitor C11, a diode D4, a resistor R11, and a capacitor C12, wherein the transient suppression diode D3, the capacitor C9, and the capacitor C10 are connected in parallel between the chip input pin and the circuit ground; the resistor R12 is connected between the chip input pin and the enable pin, the anode of the diode D4 is connected with the output pin of the charging chip U3, the cathode of the diode D4 is connected with one end of the resistor R11, and the other end of the resistor R11 is used as an output end output circuit power supply VDD _ BAT to charge the button lithium battery J2; the capacitor C11 is connected between the anode of the diode D4 and circuit ground, and the capacitor C12 is connected between the output terminal of the resistor R11 and circuit ground.
The power supply module is provided with a capacitor C9, a capacitor C10, a capacitor C11 and a capacitor C12 for filtering a power supply, a resistor R12 for providing an enabling signal and a resistor R11 for limiting current. The diode D4 is used as a one-way switch to prevent the electricity of the rechargeable button lithium battery from reversely flowing into the rechargeable chip U3 to affect the stability of the rechargeable button lithium battery.
Herein, the power supply VDD _5V is provided through a USB interface, or provided by a lithium battery, or provided by a dry battery.
The transient suppression diodes are arranged in each functional circuit and used for absorbing surge power, so that the voltage between the two electrodes is clamped at a preset value, and components in each functional circuit are effectively protected from being damaged by various surge pulses.
A data interaction module configured to implement data interaction, the data interaction module adopting one of the following structures:
1) the Bluetooth module can be matched with a second terminal device with a Bluetooth function, any Bluetooth module can be adopted, the effective distance of the Bluetooth module configured in the text is 5M, and 5V/2mA USB charging is supported. Specifically, referring to fig. 5, the bluetooth module configured herein includes a bluetooth chip U1 and a light emitting diode D5, a low power supply terminal of the bluetooth chip U1 is grounded via a capacitor C2, a high power supply terminal is connected to a circuit power supply VDD _ BAT via a capacitor C1, and a capacitor C1 is also connected to a circuit; the anode of the light-emitting diode D5 is connected with a status pin of the Bluetooth chip U1 and is used for indicating the working status of the Bluetooth module, if the Bluetooth module is in the working status, the light-emitting diode D5 emits light, otherwise, the light-emitting diode D5 is turned off; the cathode of the light-emitting diode D5 is directly connected with the circuit ground or is connected with the circuit ground through the resistor R26; the Bluetooth chip U1 is directly connected with the data processing module, or is respectively connected with the data processing module through a resistor R2, a resistor R3 and a resistor R9, or the Bluetooth chip U1 is respectively connected with an interface J1 or is directly connected with an interface J1 through a resistor R2, a resistor R3 and a resistor R9, and the interface J1 is connected with the data processing module.
2) And the Micro USB interface module is connected with the second terminal equipment through a data line to realize data interaction. Referring to fig. 6, the Micro USB interface module configured herein includes a Micro USB interface J3, a transient suppression diode D6, a transient suppression diode D7, and a transient suppression diode D8, where the Micro interface J3 is directly connected to the data processing module or is connected to the data processing module through a resistor R21, a resistor R22, and a resistor R23, respectively; the transient suppression diode D7, the transient suppression diode D6 and the transient suppression diode D6 are connected between a pin connected to the data processing module and a circuit ground, respectively.
3) Bluetooth module and Micro USB interface module, Bluetooth module and Micro USB interface module can adopt above-mentioned circuit structure.
The second terminal is configured to be connected with the first terminal through the data interaction module to obtain each point pressure value;
the second terminal performs the following processing on the pressure value of each point:
1) calculating the average value of the pressure sum of each point under the time point;
2) calculating the deviation value and the sum deviation value of each point;
3) and calculating the pressure percentage of the target area of the sole in a time range and the deviation percentage of the pressure of the left foot and the right foot in the time range.
Wherein the second terminal calculates an average value of the sum of the pressures at the respective sites at the time point by the following formula (6),
g’=(g1+g2+g3+......+gn)/n （6）
in the formula: g’The average value of the pressure sum of each point under the time point is obtained; g1+ g2+ g3+. + gn is a pressure value of each point under a time point, and n is a pointThe number is a natural number greater than 0.
And the average value of the sum of the pressures of the point positions at different time points is calculated to form a pressure trend graph, so that the data is more visual, and the data analysis is facilitated. The dot digits take the values of 4, 7, 8, 10 and the like according to the situation. The left foot and the right foot can be taken simultaneously, or only the left foot or the right foot can be taken.
The second terminal calculates the deviation value and the sum deviation value of each point position through the formula (1) and the formula (2);
g = (g left-g right)/g left 100 (1)
g = (g right-g left)/g right 100 (2)
In the formula: g is the deviation percentage of the total sum of the target point positions of the sole, when the total sum of the single pressure values of the target point positions of the sole of the left foot is larger than the total sum of the single pressure values of the target point positions of the same number of the right foot at the latest time, the formula (1) is used, otherwise, the formula (2) is used; g, the right is the sum of the point position pressure values of the single right foot sole target points; and g, left is the sum of the point position pressure values of the single left foot sole target points. Taking 8 point locations of the sole of the left foot and the right foot as an example, g represents the deviation percentage of the sum of the 8 point locations of the left foot and the right foot, and when the sum of the 8 point location single pressure values of the left foot is greater than the sum of the 8 point location single pressure values of the right foot at the latest time, the formula (1) is used, otherwise, the formula (2) is used. At the moment, the left side of g is the sum of 8 point pressure values of the single left foot; and g right is the sum of 8 point pressure values of a single right foot. Of course, those skilled in the art should understand that the target point number is 8, and this is only an exemplary illustration and is not a limitation. The number of the target points on the sole of the foot can be selected randomly, such as 6, 5, 10 or the like.
The percentage of pressure in the target area of the sole of the foot over time is calculated by the following formula:
g’=g1+g2+....+gn/gsum*100 （3）
in the formula: g' is the percentage of pressure in the target area of the sole of the foot; g1, g2 and gn are point location pressure values in the sole target area, n is a target area point location value, namely the number of the target area point locations is a natural number larger than 0; gsum is the sum of the left and right pressure values of the left/right foot sole target point in the time range.
In this case, the plantar target region is arbitrarily set, for example, one or three regions of the forefoot, the ball, the heel. If the target areas of the sole are forefoot, sole and heel, respectively taking 3 pressure values of the forefoot area as g1, g2 and g3, taking 2 pressure values of the sole area as g4 and g5, and taking 3 pressure values of the heel area as g6, g7 and g 8; the percentage pressures in the forefoot, ball and heel regions were calculated using equation (3) as follows: g' forefoot = (g1+ g2+ g3)/gsum 100; g' paw = (g4+ g5)/gsum 100; g' heel = (g6+ g7+ g8)/gsum 100.
The percentage of left and right foot pressure deviation over time is calculated by the following formula:
g left = (gsum left-gsum right)/gsum left 100 (4)
g Right =100-g left (5)
In the formula: g left is left foot pressure deviation percentage; g right is the pressure deviation percentage of the right foot; the sum of the pressure values of the target point locations of the sole of the left foot in the time range is shown on the left side of sum, and the sum of the pressure values of the target point locations of the sole of the right foot in the time range is shown on the right side of sum.
After the pressure value formed by the first terminal through the second terminal is processed, the data expression form is visual, and the data is directly stored or used for analysis. When the pressure trend graph is used for analysis, after the pressure trend graph is processed by the second terminal, the pressure trend graph is constructed according to the average value of the sum of the pressures of all the points under the time point; constructing a deviation graph according to the deviation value and the sum deviation value; and constructing a pressure distribution map according to the pressure percentage of the target area of the sole in the time range and the deviation percentage of the pressure of the left foot and the right foot in the time range.
The data processed by the second terminal can be analyzed by other devices or manually. If being carried out the analysis by medical personnel to supplementary medical personnel know the backbone condition of target object, specific analytic process is: medical staff collects the average value of the pressure sum of each point position under the time point, the deviation value and the sum deviation value of each point position, the pressure percentage of the sole target area in the time range and the deviation percentage of the pressure of the left foot and the right foot in the time range, which are obtained based on the calculation of the second terminal, 1-2 times a day, and obtains the spinal conditions of different target objects through comparative analysis in different time periods. For example, aiming at women in the pre-pregnancy period, medical staff perform comparative analysis, the pressure values of the left foot and the right foot are gradually close, the deviation of the positions of the left foot and the right foot is gradually reduced in different time periods (the deviation plus or minus 20% is a normal range), the pressure distribution of the left foot and the right foot is gradually uniform (the stress of the front foot is 20% -30%, the stress of the sole is 10% -20%, and the stress of the heel is 55% -65% is a normal range), and the spine health of the women in the pre-pregnancy period is marked; on the contrary, the female in the pregnancy preparation period may have spine health problems and need further diagnosis and treatment; aiming at the condition of restoring the pelvis of the lying-in woman, medical staff gradually approach the pressure values of the left foot and the right foot, gradually reduce the deviation of the positions of the left foot and the right foot (the deviation plus or minus 25 percent is a normal range), and gradually and uniformly distribute the pressure of the left foot and the right foot (the stress of the front foot is 20 to 30 percent, the stress of the sole is 10 to 20 percent, and the stress of the heel is 50 to 70 percent is a normal range) by comparing in different time periods, thereby indicating that the pelvis of the lying-in woman is gradually restored; otherwise, adverse reaction may occur to the pelvis of the puerpera, and further diagnosis and treatment are needed; aiming at the spinal rehabilitation condition analysis, medical staff gradually approach the left and right foot pressure values, gradually reduce the deviation of the left and right foot point positions (the deviation plus or minus 40% is a normal range), gradually and uniformly distribute the left and right foot pressures (the forefoot stress is 15% -35%, the sole stress is 10% -25%, and the heel stress is 45% -65% is a normal range) by comparison in different time periods, and mark that the patient is gradually recovered; otherwise, the patient may have spine related diseases and needs further diagnosis and treatment; analyzing the health state of the growth and development of the vertebral column of the teenagers: medical staff compare the left foot pressure value and the right foot pressure value in different time periods, the deviation of the left foot point and the right foot point is gradually reduced (the deviation plus or minus 30 percent is a normal range), the left foot pressure and the right foot pressure are gradually and uniformly distributed (the stress on the front of the foot is 15 to 30 percent, the stress on the palm of the foot is 10 to 30 percent, and the stress on the heel is 40 to 70 percent of the normal range), and the growth and development of the spine of the teenagers are marked in the range of the health value; otherwise, the teenagers may have spine health problems and need further diagnosis and treatment; aiming at the spine health state analysis of middle-aged and elderly people, medical staff gradually approach the left and right foot pressure values, gradually reduce the deviation of the left and right foot point positions (the deviation plus or minus 20% is a normal range), gradually and uniformly distribute the left and right foot pressures (the foot front stress is 15% -25%, the foot palm stress is 20% -30%, and the heel stress is 50% -65% is a normal range) by comparison in different time periods, and mark the middle-aged and elderly people in the health value range; otherwise, the user may have spine health problems and need further diagnosis and treatment.
Based on the pressure values of all the positions of the sole obtained by the invention, medical staff are assisted to realize pressure analysis, gait trend analysis, left and right foot deviation analysis and pressure distribution analysis of the front, heel and sole of the left and right feet, and the medical staff can carry out effective diagnosis and treatment judgment on users through the analysis.
The first terminal end is expressed in an insole structure to form an insole with pressure sensing. Referring to fig. 8, the data acquisition modules 2 are distributed at any position on the insole body 1 according to conditions, and are used for sensing pressure at different positions. If the data acquisition module 2 is distributed in the forefoot area, the outer side of the arch and the rear foot area of the insole body 1; or only in the forefoot region, the outer arch or the rearfoot region of the insole body 1. The number of the data acquisition modules 2 is set according to the situation, such as 3, 5, 8 and 10, the distribution number and the positions of the data acquisition modules 2 on the insole bodies 1 of the left foot and the right foot can be the same or different, and as shown in fig. 7, the distribution number and the positions of the data acquisition modules 2 on the insole bodies 1 of the left foot and the right foot are the same, so that 8 point position insoles are formed. The distributed data acquisition modules 2 are connected with the data processing module through wiring.
In order to ensure the comfort of the insole model, the data acquisition module 2 can be flexible nanometer pressure sensing.
The insole provided by the text is assembled on the sole, the pressure of the sole is sensed in real time to form a pressure value, the pressure value is transmitted to the second terminal through the data interaction module in a network state, or the second terminal reads the pressure value through the data interaction module in the network state, and the pressure value is obtained. The insole directly provides the pressure value, and the second terminal directly processes or stores the pressure value.
The network state here may be a wireless network state, such as a bluetooth network state; or in a wired network state, such as by using a Micro USB interface in conjunction with a data line.
The flow between the first terminal and the second terminal is such that:
step 1: and the second terminal equipment searches the insole model Bluetooth and matches.
Step 2: after pairing is successful, the first terminal broadcasts to send BLE broadcast data and BLE transparent transmission data to the second terminal; the data is in a byte format, the second terminal receives the data and then needs to analyze the data, and the first terminal converts the resistance value into a pressure value;
and step 3: and after receiving the data, the second terminal completes single interaction, and sends the data to the paired second terminals again each time the pressure value of the first terminal changes, if the paired second terminals are disconnected, the first terminal enters a dormant working state.
The foregoing steps 1 to 3 are based on the description that the bluetooth module is taken as a data interaction module as an example, and if the Micro USB interface is taken as a data interaction module, the data interaction module is connected to the second terminal through a data line to implement data transmission/reading.
Table 1 shows a BLE broadcast data format transmitted by a first terminal to a second terminal.
Table 1 BLE broadcast data format table
The device in the table is a first terminal and is distinguished according to different configuration byte serial numbers and byte values.
The BLE broadcast data are used for enabling the second terminal to acquire data through serial ports and Bluetooth broadcast; the sampled data in the data format is defined as transparent transmission data or only comprises mark bytes; the MAC address may be used in the data format to distinguish between different first terminals.
The BLE passthrough data format is shown in table 2.
Table 2 BLE transparent transmission data format table
BLE passes through data and is used for making the second terminal obtain data through serial ports, bluetooth broadcast. In the data format, the check bytes are Byte 2-Byte 23, and are added with 1 after being added; the data is hexadecimal number, the high byte is in front, after the low byte is in disaster, the unit of the pressure value is g; the upper 4 bits of Byte22 are the first terminal number, bit7=1 indicates the right leg, bit7=0 indicates the left leg; the 12bit data consisting of the lower 4 bits of Byte22 and Byte23 represents the battery voltage in mv; when the voltage of the battery is lower than 2.4V, the battery is charged or replaced in time, and when the voltage of the battery is higher than 3.2, the charging or the replacement of the battery is stopped, otherwise, the battery is damaged.
The second terminal described herein may be any device supporting USB access and bluetooth, such as a computer or a mobile phone.
The above embodiments are only for illustrating the technical solutions of the present invention and are not limited, and modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention are included in the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A system for converting plantar pressure values by using resistance values is characterized by comprising:
the first terminal is configured for sensing each point pressure of the sole, forming each point resistance value in a linear relation with the sensed each point pressure, and converting each point resistance value into each point pressure value;
the data interaction module is configured for realizing data interaction; and
the second terminal is configured to be connected with the first terminal through the data interaction module to acquire each point pressure value;
the second terminal performs the following processing on the pressure value of each point:
calculating the average value of the pressure sum of each point under the time point;
calculating the deviation value and the sum deviation value of each point;
and calculating the pressure percentage of the target area of the sole in a time range and the deviation percentage of the pressure of the left foot and the right foot in the time range.
2. The system for converting plantar pressure values according to claim 1, wherein the first terminal comprises:
the data acquisition module is configured for sensing pressure of each point on the sole and respectively outputting electric quantity of each point in a linear relation with the sensed pressure of each point;
and the data processing module is configured to be connected with the data acquisition module, convert each point electric quantity into a corresponding point resistance value, and convert each point resistance value into a corresponding point pressure value.
3. The system for converting plantar pressure values according to claim 1, wherein the first terminal comprises:
the data acquisition module is configured for sensing pressure of each point on the sole and respectively outputting resistance values of each point in a linear relation with the sensed pressure of each point;
and the data processing module is configured to be connected with the data acquisition module and convert each point resistance value into each point pressure value.
4. The system for converting the plantar pressure value according to the resistance values of claims 2 or 3, wherein the first terminal further comprises a wake-up detection module configured to be connected with the data processing module for waking up the data processing module.
5. The system for converting plantar pressure values according to claim 1, further comprising a power supply module configured as a button lithium battery.
6. The system for converting plantar pressure values according to claim 5, wherein the button lithium battery is a rechargeable lithium battery, and the power supply module further comprises a charging circuit for charging the button lithium battery.
7. The system for converting plantar pressure values according to claim 1, wherein the total deviation value is calculated by the following formula:
g = (g left-g right)/g left 100 (1)
g = (g right-g left)/g right 100 (2)
In the formula: g is the deviation percentage of the total target point position of the sole; g, the right is the sum of the point position pressure values of the single right foot sole target points; and g, left is the sum of the point position pressure values of the single left foot sole target points.
8. The system for converting the plantar pressure value according to claim 1, wherein the percentage of pressure in the plantar target region in a time range is calculated according to the following formula:
g’=g1+g2+....+gn/gsum*100 （3）
in the formula: g' is the percentage of pressure in the target area of the sole of the foot; g1, g2 and gn are point position pressure values in the target area of the sole, and n is a point position value of the target area; gsum is the sum of the left and right pressure values of the left/right foot sole target point in the time range.
9. The system for converting plantar pressure values according to claim 1, wherein the percentage of left and right foot pressure deviations in time range is calculated by the following formula:
g left = (gsum left-gsum right)/gsum left 100 (4)
g Right =100-g left (5)
In the formula: g left is left foot pressure deviation percentage; g right is the pressure deviation percentage of the right foot; and the left part of gsum is the pressure value sum of the target point positions of the sole of the left foot in the time range, and the right part of gsum is the pressure value sum of the target point positions of the sole of the right foot in the time range.
10. The system for converting plantar pressure values according to claim 1, wherein the second terminal forms a pressure trend graph after calculating an average value of the sum of the pressures of the various sites at a time point; calculating the deviation value and the sum deviation value of each point location to form a deviation graph; and (4) calculating the pressure percentage of the target area of the sole in the time range and the deviation percentage of the pressure of the left foot and the right foot in the time range to form a pressure distribution map.
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