CN113967006B - Portable diabetic foot physiological parameter monitoring system - Google Patents

Abstract

The invention relates to a portable diabetic foot physiological parameter monitoring system, belonging to the technical field of data monitoring. The system includes clog-shaped shoe body, toe guide, fixed belt, pressure measurement module, near-infrared module, power module, A/D conversion module, microcontroller, signal processing and data analysis module, voice reminder module, and wireless communication module ; The toe guide is used to separate each toe and guide the sole of the foot to align with the monitoring system from the front and back direction to prevent the sensor from deviating from the collection point during the collection process; the pressure measurement module is used to detect the pressure in areas prone to foot ulcers; near infrared The module is placed in the rich blood vessel area of the foot and is used to detect foot temperature and blood flow velocity; the microcontroller is the main controller of the monitoring system, controlling the signal processing and data analysis module to determine whether the toe guide is working normally and whether the stance is correct. correct. The invention improves monitoring accuracy and can simultaneously monitor multiple parameters such as foot pressure, temperature, blood flow velocity, etc.

Description

A portable diabetic foot physiological parameter monitoring system

Technical field

The invention belongs to the technical field of data monitoring and relates to a portable diabetic foot physiological parameter monitoring system.

Background technique

Relevant studies have shown that increased foot pressure is an independent risk factor for diabetic foot, and the correlation between the two is as high as 70%-90%. In addition, because diabetic patients are in a state of high blood sugar for a long time, the nerves and blood vessels of the feet are also damaged to varying degrees, causing the temperature of the feet to become lower and the blood flow rate to slow down. Monitor the pressure, temperature, blood flow rate and other physiological parameters of the soles of the feet. It has important application value for timely grasping the status of diabetic foot and the development process of diabetes.

In recent years, some diabetic foot monitoring devices with application value have appeared, such as: (1) The patent with publication number CN201820308894U discloses a diabetic shoe system for monitoring and reducing plantar pressure of diabetic patients. The system includes a shoe The main body, pressure-reducing insole, plantar pressure monitoring module and smart terminal can easily measure and monitor the pressure of different parts of the feet of diabetic patients, and help them reduce the pressure of high parts. However, this invention lacks the ability to monitor the foot temperature and The collection of blood flow velocity cannot reflect the neurological and vascular diseases of the foot; at the same time, there is no effective fixation device for the contact area between the foot and the sensor. During the collection process, the sensor may shift from the original collection point of the foot, resulting in inaccurate results. precise. (2) The patent with publication number CN201621292169U discloses a portable diabetic foot prevention and treatment insole based on a remote monitoring system, including a foot temperature monitor and a pressure detector, which can realize real-time monitoring, remote monitoring, and correction of foot muscle strength. Achieve real-time correction of gait. However, this invention lacks monitoring of blood flow velocity, cannot reflect the condition of foot vascular lesions, lacks judgment on the collected data, and cannot guarantee the validity of the data. Most inventions that measure foot blood flow velocity use ultrasound. The sampling unit is large and not suitable for portability.

Contents of the invention

In view of this, the purpose of the present invention is to provide a portable diabetic foot physiological parameter monitoring system, which is suitable for users to self-measure foot physiological parameters in a home living environment, and can simultaneously monitor foot pressure, temperature, blood flow rate and other parameters.

In order to achieve the above objects, the present invention provides the following technical solutions:

A portable diabetic foot physiological parameter monitoring system, including clog-shaped shoe body, toe guide A4, pressure measurement module A5, near-infrared module A6, power module, A/D conversion module, microcontroller, signal processing and data analysis module ;

The toe guide A4 is used to separate each toe. Combined with the pressure sensor inside the toe guide, it can monitor the fit of the toe root with the guide, guide the sole of the foot to align with the monitoring system from the front and rear direction, and prevent the sensor from being used during the collection process. deviation from the collection point;

The pressure measurement module A5 is used to detect the pressure in areas prone to foot ulcers;

The near-infrared module A6 is placed in the rich blood vessel area of the foot to detect foot temperature and blood flow velocity;

The power module supplies power to the entire monitoring system; the A/D conversion module performs analog-to-digital conversion on the collected physiological parameter signals; the microcontroller is the main controller of the monitoring system, controlling the work of the signal processing and data analysis modules; The signal processing and data analysis module is used to determine whether the toe guide is working properly and whether the stance is correct.

Preferably, the toe guide A4 is located between the second toe and the third toe, and between the third toe and the fourth toe, for separating the second, third and fourth toes.

Preferably, a pressure sensor A42 is provided inside the toe guide A4. The pressure sensor is placed at the toe-heel connection. When receiving pressure from the toe-heel connection, the sensor will deform to measure the pressure value. When the pressure value is greater than the threshold, When , it means that the foot and the detection device have completed the front-to-back alignment to prevent the foot pressure sensor from deviating from the collection point during the collection process.

Preferably, the pressure measurement module A5 is placed on the first toe to the third toe, the first to the fourth metatarsal, and the heel and other ulcer-prone parts, and is combined with the toe guide A4 to collect effective pressure data and monitor the pressure. Variety.

Preferably, the near-infrared module A6 has an array structure, including a near-infrared detector, a transmitting probe, and a receiving probe, and a light-blocking plate is provided between the detector, the transmitting probe, and the receiving probe.

Preferably, the system also includes a fixing belt A3, located in the middle of the foot, used to fix the foot body so that the foot fits the sensor up and down to ensure that the sensor is at the corresponding collection point.

Preferably, the system also includes a voice reminder module, which reminds the patient to adjust the toe position and stance based on the judgment results of the signal processing and data analysis module.

Preferably, the system also includes a communication module (such as a wireless communication module), which transmits the judgment results obtained by the signal processing and data analysis module to the network, so that the diabetes health management center can remotely control the user's pathological status and development process of the diabetic foot.

The beneficial effects of the present invention are: the present invention is a multifunctional diabetic foot physiological parameter monitoring system, which selects pressure sensors to monitor foot pressure and near-infrared to monitor foot temperature and blood flow velocity. At the same time, a toe guide and a fixing strap are added to make the foot fit more closely with the corresponding position sensor. The data collection process is designed to guide patients to collect data correctly and improve the accuracy of data monitoring. Finally, the data is sent to the network system platform via wireless communication, which allows the diabetes health management center to remotely control the user's pathological status and development process of the diabetic foot.

Other advantages, objects, and features of the present invention will, to the extent that they are set forth in the description that follows, and to the extent that they will become apparent to those skilled in the art upon examination of the following, or may be derived from This invention is taught by practicing it. The objects and other advantages of the invention may be realized and obtained by the following description.

Description of the drawings

In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings, in which:

Figure 1 is a control structure diagram of the monitoring system according to the embodiment of the present invention;

Figure 2 is a device structure diagram of the monitoring system according to the embodiment of the present invention;

Figure 3 is a structural diagram of the near-infrared module of the monitoring system according to the embodiment of the present invention;

Figure 4 is a side cross-sectional structural view of the toe guide according to the embodiment of the present invention;

Figure 5 is a diagram showing the installation positions of the toe guide and pressure sensor according to the embodiment of the present invention;

Figure 6 is a collection flow chart of the monitoring system of the present invention;

Reference signs: A1-transparent anti-slip layer, A2-processing device, A3-fixing belt, A4-toe guide, A5-pressure measurement module, A6-near infrared module, A61-light barrier, A62-near infrared detector, A63-transmitting probe, A64-receiving probe, A41-filler, A42-pressure sensor, B1-human foot tissue.

Detailed ways

The following describes the embodiments of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. The following embodiments and the features in the embodiments can be combined with each other as long as there is no conflict.

The drawings are only for illustrative purposes, and represent only schematic diagrams rather than actual drawings, which cannot be understood as limitations of the present invention. In order to better illustrate the embodiments of the present invention, some components of the drawings will be omitted. The enlargement or reduction does not represent the size of the actual product; it is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

In the drawings of the embodiments of the present invention, the same or similar numbers correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms "upper", "lower", "left" and "right" The orientation or positional relationship indicated by "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must be It has a specific orientation and is constructed and operated in a specific orientation. Therefore, the terms describing the positional relationships in the drawings are only for illustrative purposes and cannot be understood as limitations of the present invention. For those of ordinary skill in the art, they can determine the specific position according to the specific orientation. Understand the specific meaning of the above terms.

Please refer to Figures 1 to 6. This embodiment provides a multifunctional diabetic foot physiological parameter monitoring system, including a clog-shaped shoe body, a toe guide A4, a fixed belt A3, a pressure measurement module A5, a near-infrared module A6, and a power supply. module, A/D conversion module, microcontroller, signal processing and data analysis module, voice reminder module and wireless communication module. Its structural and functional block diagram is shown in Figure 1. The pressure measurement module A5 collects the pressure in the foot ulcer-prone area, the near-infrared module A6 detects the temperature and blood flow velocity, and the A/D conversion module converts the collected physiological signals to digital. Into the microcontroller, the microcontroller controls the signal processing and data analysis module, voice reminder module, and wireless communication module to complete threshold judgment, posture recognition, voice reminder, and finally sends the data to the network system platform through wireless communication.

Figure 2 is a structural diagram of the device of this embodiment. The overall shoe has a clog-type structure, which is convenient for quick wearing. The material of the sole is made of a material with good elasticity and support. Divided into three layers:

The first layer is the anti-slip layer: This layer is the transparent anti-slip layer A1, which is located on the top layer of the insole and is made of anti-slip material. It can prevent the foot from deviating from the collection position due to sweating and other factors during the collection process and cover the pressure sensor to reduce the foot pressure. Foreign body sensation.

A processing device A2, a fixing belt A3 and a toe guide A4 are provided on the transparent anti-slip layer A1. in,

The processing device A2 includes a power module, an A/D conversion module, a microcontroller, a signal processing and data analysis module, a voice reminder module, and a wireless communication module. After integration, it is placed on the fixed belt A3, saving space, and being beautiful and portable. The power module is used to supply power to the entire system. The A/D conversion module is used to convert the physiological parameter signal into a voltage signal. The microcontroller receives the voltage signal from the A/D conversion module and contains the pressure threshold judgment and standing posture in the guide. Through the detection and voice reminder procedures, the wireless communication module sends physiological parameter data to the network system platform, and the diabetes health management center remotely controls the user's pathological status and development process of the diabetic foot.

The fixing strap A3 is used to fix the foot body so that the foot fits the sensor up and down to prevent the sensor from deviating from the collection point during the collection process.

The toe guide A4 is used to separate the second toe from the third toe, and the third toe from the fourth toe. There is a pressure sensor inside to monitor whether the guide is working normally. When working normally, the foot can be attached to the sensor at the corresponding position. combine.

The second layer is the pressure measurement layer: a pressure measurement module A5 is provided on the surface of this layer, as shown in Figure 5. The pressure measurement module (such as a pressure sensor) A5 is placed on the first toe to the third toe of the foot, and the first metatarsal to The fourth metatarsal, heel and other areas prone to ulcers.

The third layer is the near-infrared layer: a near-infrared module A6 is installed on the surface of this layer, which is placed in the rich blood vessel area in the middle of the foot to measure foot temperature and blood flow velocity.

Figure 3 is a structural diagram of the near-infrared module of this embodiment. It mainly includes the light barrier A61, the near-infrared detector (T) A62, the transmitting probe (S) A63, and the receiving probe (R) A64. The detectors and probes are arranged in an array, and light barriers are placed between the near-infrared detectors, the transmitting probe, and the receiving probe to prevent mutual interference. The near-infrared module has two working modes. Working mode one is used to measure temperature, which is mainly completed by the near-infrared detector. Specifically: when the temperature of human foot tissue B1 is greater than absolute zero, it will emit thermal radiation outward, which is received by the infrared detector. , the body temperature can be obtained by calculating the surface heat of the radiation source through the thermal radiation algorithm; working mode 2 is used to measure blood flow velocity, which is mainly completed by the transmitting probe and the receiving probe, specifically: the transmitting probe emits near-infrared light outwards, and when the After the near-infrared light is absorbed by the tissue, the red blood cells in the blood vessels will move due to blood circulation. When the near-infrared light emitted by the probe moves relative to the red blood cells, the frequency of the light source vibration wave received by the red blood cells is the same as the frequency of the light source vibration wave of the emitting probe. Different, the receiving probe receives the light source returned by the red blood cells, and can calculate the blood flow velocity based on this difference.

Figure 4 is a side cross-sectional structural view of the toe guide of this embodiment, including filler A41 and pressure sensor A42. The internal pressure sensor A42 is placed at the toe-heel connection. When it is subject to pressure from the toe-heel connection, it will deform. The pressure value is read based on the deformation. When the pressure value is greater than the set threshold, it means that the person's toes are in contact with the guide. Close, the guide works normally.

Figure 5 is a position diagram of the toe guide and the pressure sensor in this embodiment. The toe guide is located between the second toe and the third toe, and between the third toe and the fourth toe. The pressure sensor A42 is located near the heel of the toe. position, used to detect the pressure from the toe-heel connection and monitor whether the guide is working normally; the pressure measurement module (such as pressure sensor) A5 is placed on the first toe to the third toe, the first metatarsal to the fourth metatarsal, the heel, etc. Areas prone to ulcers.

Figure 6 is a collection flow chart using the monitoring system of this embodiment. This process is recorded as follows based on the measurement of weight distribution on the soles of healthy people by Columbia University in the United States; the heel support point accounts for 50%; the big toe support point accounts for 33.3% ;The other four toe support points account for 16.4%. According to the fact that when the human body is standing, the pressure between the feet and the ground is proportional to the human body's weight, the relationship between pressure and weight can be obtained. In order to obtain an effective plantar pressure value, first let the patient wear the device and stand naturally, collect the internal pressure value of the guide, and detect whether the collected pressure reaches the threshold. Reaching the threshold indicates that the guide is functioning normally. If the threshold is not reached, a voice prompt will be given to adjust the toe position. After the guide is in the correct position, collect the plantar pressure and determine the proportion of pressure values in each area of the foot. Since the local pressure of diabetic foot patients will be higher than that of normal people, when the proportion of each area of the foot is greater than that of healthy people, The ratio indicates that the standing posture is correct. When the standing posture is abnormal, the voice prompts the patient to adjust. After the adjustment is correct, various physiological parameters can be collected under normal standing posture. The temperature is collected in working mode 1, and the blood flow velocity is collected in working mode 2. The collected pressure, temperature, and blood flow velocity are transmitted to the diabetes health management center through the network. The diabetes management center can remotely control the pathological status and development process of the user's diabetic foot.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified. Modifications or equivalent substitutions without departing from the purpose and scope of the technical solution shall be included in the scope of the claims of the present invention.

Claims (7)

1. The portable diabetic foot physiological parameter monitoring system comprises a shoe body of a shoe type, and is characterized by further comprising a toe guide (A4), a pressure measuring module (A5), a near infrared module (A6), a power supply module, an A/D conversion module, a microcontroller and a signal processing and data analysis module;

the toe guide (A4) is used for separating each toe, guiding the sole to align with the monitoring system from the front-back direction and preventing the sensor from deviating from the collecting point in the collecting process; a pressure sensor (A42) is arranged in the toe guide (A4), the pressure sensor is arranged at the joint of the toe and the heel, and when the pressure from the joint of the toe and the heel is received, the sensor deforms, so that a pressure value is measured, when the pressure value is greater than a threshold value, the front and back alignment of the foot and the detection device is finished, and the plantar pressure sensor is prevented from deviating from a collection point in the collection process;

the pressure measuring module (A5) is used for detecting the pressure of the foot ulcer susceptibility area;

the near infrared module (A6) is placed in a blood vessel rich region in the foot and is used for detecting the temperature and the blood flow speed of the foot;

the power supply module supplies power to the whole monitoring system; the A/D conversion module carries out analog-to-digital conversion on the collected physiological parameter signals; the microcontroller is a master controller of the monitoring system and controls the signal processing and data analysis module to work; the signal processing and data analyzing module is used for judging whether the toe guide works normally or not and whether the standing posture is correct or not.

2. The portable diabetic foot physiological parameter monitoring system according to claim 1 wherein the toe guide (A4) is positioned between the second toe and the third toe and between the third toe and the fourth toe for separating the two, three, four toes.

3. The portable diabetic foot physiological parameter monitoring system according to claim 1 wherein the pressure measurement module (A5) is placed at the first to third digits, the first to fourth metatarsals, and the heel, and in conjunction with the toe guide (A4), effective pressure data is collected to monitor pressure changes.

4. The portable diabetic foot physiological parameter monitoring system according to claim 1 wherein the near infrared module (A6) is of an array structure, comprising a near infrared detector, a transmitting probe and a receiving probe, and a light-shielding plate is provided between the detector and the transmitting and receiving probes.

5. The portable diabetic foot physiological parameter monitoring system according to claim 1 further comprising a fixing strap (A3) positioned in the midfoot for fixing the foot body to enable the foot to fit the sensor up and down, ensuring that the sensor is at the corresponding acquisition point.

6. The portable diabetic foot physiological parameter monitoring system according to any one of claims 1-5, further comprising a voice reminding module for reminding a patient to adjust the toe position and standing posture according to the judgment result of the signal processing and data analysis module.

7. The portable diabetic foot physiological parameter monitoring system according to any one of claims 1 to 5, further comprising a communication module, wherein the result obtained by the signal processing and data analysis module is transmitted to a network, and the diabetic foot pathological state and development process of the user can be remotely mastered by the diabetic health management center.