Urine early warning device based on ultrasound and posture detection

Abstract

The utility model relates to a urine early warning device based on ultrasound and posture detection, which comprises a piezoelectric ultrasonic sensor and an IMU (inertial measurement unit) module, the IMU module is used for posture detection, and the piezoelectric ultrasonic sensor is used for monitoring the change of the volume of the bladder; the piezoelectric ultrasonic sensor and the IMU module are integrated on a detection end, and the detection end is worn in an area between the pubis and the navel of a human body. The piezoelectric ultrasonic sensor comprises a backing layer, piezoelectric ceramics, an impedance matching layer and a flexible attaching layer, one side face of the impedance matching layer is a plane, the other side of the impedance matching layer is an arc-like face, a plurality of grooves forming different angles with the horizontal plane are formed in the arc-like face, the piezoelectric ceramics are fixed in the grooves respectively, all the piezoelectric ceramics are arranged from top to bottom, and the flexible attaching layer is arranged between the backing layer and the piezoelectric ceramics. The generated signal can cover a deformed area of the bladder. The device can obtain the human bladder expansion degree and the human posture information in real time, the early warning precision is improved, wearing is more convenient and comfortable, and detection is quicker and more accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of flexible electronics, in particular to a urination warning device based on ultrasound and posture detection. Background Art

[0002] The research on urination warning devices was born out of the urgent need to care for patients with urinary incontinence and improve their quality of life. Urinary incontinence is a common medical problem that affects people of all ages, especially the elderly, infants, patients with neurological diseases, and postoperative patients. Urinary incontinence not only brings physical discomfort to patients, but may also cause complications such as skin inflammation and bedsores, and also have a negative impact on patients' psychological and social life.

[0003] Traditional methods of managing urinary incontinence include using diapers or adult diapers, timed urination training, medication, and behavioral therapy. However, these methods have certain limitations. For example, failure to change diapers in time may cause skin problems, medication may have side effects, and timed urination training and behavioral therapy require continuous efforts from patients and caregivers.

[0004] Therefore, the research on urination warning devices aims to provide a more intelligent and convenient solution to monitor the patient's bladder filling status in real time, and issue a warning in time when the bladder expansion reaches the threshold, reminding the patient or caregiver to deal with it in time. Such a device can help reduce the impact of urinary incontinence on patients' daily lives, improve their quality of life, and reduce the burden on caregivers. With the advancement of sensor technology, flexible electronics technology, wireless communication technology and microelectronics technology, it has become possible to develop lightweight, comfortable and wearable urination warning devices. The development of these technologies provides more design options and functional realizations for urination warning devices, making them more accurate, sensitive and user-friendly.

[0005] For example, in a Chinese patent with the announcement number CN218247230U, a urinary urge prediction device based on electromyography and micro-pressure signals is disclosed. The overall structure of the device is relatively large, which is not convenient for the human body to wear, and has the limitations of insufficient signal acquisition accuracy and uncomfortable wearing. In addition, considering that the bladder monitoring algorithm is different when the human body is standing or sitting, it is necessary to consider them separately and provide different early warning mechanisms, so it is necessary to monitor the human body's posture in real time. Utility Model Content

[0006] In view of the deficiencies in the prior art, the technical problem that the utility model intends to solve is to provide a urination warning device based on ultrasound and posture detection. By integrating a piezoelectric ultrasonic sensor and an IMU together, the device is flexibly worn near the lower part of the human navel to obtain the degree of bladder expansion and human posture information in real time, thereby improving the warning accuracy. The device is more convenient and comfortable to wear, the detection is faster and more accurate, and the structure is simple.

[0007] The technical solution adopted by the utility model to solve the technical problem is:

[0008] A urination warning device based on ultrasound and posture detection, the warning device comprises a piezoelectric ultrasonic sensor and an IMU module, the IMU module is used for posture detection, and the piezoelectric ultrasonic sensor is used for monitoring changes in bladder volume;

[0009] The piezoelectric ultrasonic sensor and the IMU module are integrated on a detection end, and the detection end is worn in the area between the pubic bone and the navel of the human body.

[0010] Further, the piezoelectric ultrasonic sensor includes a backing layer 1, a piezoelectric ceramic 2, an impedance matching layer 3 and a flexible bonding layer 4, wherein a through groove is provided at the center of the flexible bonding layer 4 for embedding the impedance matching layer 3, wherein one side of the impedance matching layer 3 is a plane, and the other side is an arc-shaped surface, and the arc-shaped surface is provided with a plurality of grooves at different angles to the horizontal plane, and a piezoelectric ceramic 2 is fixed in each groove, and the axes of all piezoelectric ceramics are parallel to each other, and the angles of each piezoelectric ceramic to the horizontal plane are different, and the angles gradually increase from one side to the other side, and when worn near the lower part of the navel, all piezoelectric ceramics are arranged from top to bottom, and the generated signal can cover the deformation area of ​​the bladder;

[0011] A backing layer 2 is arranged on the surface of all piezoelectric ceramics, and the backing layer 2 can be in close contact with the piezoelectric ceramics and the impedance matching layer 3;

[0012] The flexible fitting layer 4 fits the human body, and the plane side of the impedance matching layer is exposed on the surface of the through groove of the flexible fitting layer, and the plane side is flush with the through groove.

[0013] A circuit board is fixed on the backing layer 1, an IMU module is embedded in the circuit board, and a signal line of the piezoelectric ceramic is connected to the circuit board. A data acquisition module and a wireless module are arranged on the circuit board. The wireless module is used to communicate with a terminal, and the terminal is used for urination warning.

[0014] Furthermore, the backing layer is made of rubber material, and the side of the backing layer facing the impedance matching layer matches the shape of the impedance matching layer and the piezoelectric ceramics after arrangement.

[0015] Furthermore, the piezoelectric ceramic adopts at least one of piezoelectric ceramic PZT-5B, piezoelectric ceramic PZT-5H, and piezoelectric ceramic PZT-5A, the thickness of the impedance matching layer is an integer multiple of 1 / 4 of the wavelength generated by the driving frequency of the piezoelectric ceramic, and the thickness of the impedance matching layer is the thickness of the thickest part of the impedance matching layer; the overall thickness of the piezoelectric ultrasonic sensor is 4-6mm.

[0016] Furthermore, the piezoelectric ceramic adopts piezoelectric ceramic PZT-5B or piezoelectric ceramic PZT-5H, which has four piezoelectric ceramics. The impedance matching layer is provided with grooves with different inclination angles. The four piezoelectric ceramics are applied in the grooves, so that the four piezoelectric ceramics are arranged in arrays at different angles. The angles are set to -20°, -10°, 0°, and 10° from left to right. When in use, the piezoelectric ceramic at -20° is on the top and the piezoelectric ceramic at 10° is on the bottom. The generated signals are arranged from top to bottom to cover the deformation area of ​​the bladder.

[0017] Furthermore, the piezoelectric ceramic and the impedance matching layer are fixed together by a binder, and the binder is the original slurry of the impedance matching layer before solidification.

[0018] Furthermore, the early warning device also includes a shell, which wraps the circuit board, the backing layer 1, the piezoelectric ceramic 2 and the impedance matching layer 3, and a power switch button is also arranged on the shell.

[0019] Furthermore, the shell is a rectangular parallelepiped with an open end, and the open end is sealed and connected to the flexible bonding layer 4. The circuit board is provided with a data acquisition module, an AD conversion module, a Bluetooth module and a power supply. The Bluetooth module is used for data transmission. The Bluetooth module communicates with the terminal, and the urination level and warning information are displayed on the terminal; preferably, the terminal is a mobile phone APP; the upper and lower positions are marked on the shell, and the upper side refers to the side where the piezoelectric ceramic with the largest tilt angle is located.

[0020] Furthermore, the early warning device also includes a fitting sheet, on which a limiting through groove is arranged, and the limiting through groove can limit the installation position of the detection end, and the fitting sheet is fixed on the human body.

[0021] Furthermore, the IMU module is used in combination with MPU-6050 and MPU-6000.

[0022] Compared with the prior art, the beneficial effects of the utility model are:

[0023] Compared with myoelectric flexible sensing, the present application is more convenient and comfortable to wear, the device is lighter, and more friendly to bedridden elderly people; the changes in electromyographic signals are relatively small and not easy to collect, resulting in inaccurate results. This application uses ultrasound to directly measure changes in bladder volume, which can more accurately provide urination warnings. In addition, it is equipped with an inertial measurement unit (IMU), which enables different warnings based on posture information, which is more precise, fits the actual posture of the human body, and makes predictions more accurate.

[0024] In the utility model, the piezoelectric ultrasonic sensor composed of piezoelectric ceramics arranged at different angles only needs to be attached to a small area near the lower part of the navel, and the bladder volume can be estimated without covering the entire bladder structure, which greatly reduces the size of the device and is easy to wear.

[0025] The utility model integrates urination warning and human posture detection, is flexible, and is conducive to obtaining data on urination monitoring and human posture collection. It is used to continuously collect and process the real-time data of the size of the human bladder expansion volume and the human posture, and conduct further testing and analysis, meeting the requirements of comfortable, portable and safe wearing of the human body, and realizing urination warning and human posture monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the wearing and working principle of the urination warning device based on ultrasound and posture detection of the utility model;

[0027] Figure 2 This is a schematic diagram of the structure of a piezoelectric ultrasonic sensor of an embodiment of the urination warning device based on ultrasound and posture detection of the utility model;

[0028] Figure 3 This is a structural schematic diagram of an IMU module of an embodiment of the urination warning device based on ultrasound and posture detection of the utility model;

[0029] In the figure: 1. backing layer, 2. piezoelectric ceramics, 3. impedance matching layer, 4. flexible bonding layer. DETAILED DESCRIPTION

[0030] The specific embodiments of the present invention are given below. The specific embodiments are only used to further illustrate the present invention in detail and do not limit the protection scope of the claims of the present invention.

[0031] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0032] The utility model discloses a urination warning device based on ultrasound and posture detection, which includes a piezoelectric ultrasonic sensor and an IMU module. The IMU module is used for posture detection, and the piezoelectric ultrasonic sensor is used for monitoring changes in bladder volume.

[0033] The piezoelectric ultrasonic sensor and the IMU module are integrated on a detection end, and the detection end is worn in the area between the pubic bone and the navel of the human body.

[0034] The piezoelectric ultrasonic sensor comprises a backing layer 1, a piezoelectric ceramic 2, an impedance matching layer 3 and a flexible bonding layer 4, wherein a through groove is arranged at the center of the flexible bonding layer 4 for embedding the impedance matching layer 3, wherein one side of the impedance matching layer 3 is a plane, and the other side is an arc-shaped surface, and the arc-shaped surface is provided with a plurality of grooves at different angles to the horizontal plane, and a piezoelectric ceramic 2 is fixed in each groove, and the axes of all piezoelectric ceramics are parallel to each other, and the angles between each piezoelectric ceramic and the horizontal plane are different, and the angles gradually increase from one side to the other side, and when worn near the lower part of the navel, all piezoelectric ceramics are arranged from top to bottom, and the generated signal can cover the deformation area of ​​the bladder;

[0035] A backing layer 2 is arranged on the surface of all piezoelectric ceramics, and the backing layer 2 can be in close contact with the piezoelectric ceramics and the impedance matching layer 3;

[0036] The flexible fitting layer 4 fits the human body, and the plane side of the impedance matching layer is exposed on the surface of the through groove of the flexible fitting layer, and the plane side is flush with the through groove.

[0037] A circuit board is fixed on the backing layer 1, an IMU module is embedded in the circuit board, and a signal line of the piezoelectric ceramic is connected to the circuit board. A data acquisition module and a wireless module are arranged on the circuit board. The wireless module is used to communicate with a terminal, and the terminal is used for urination warning.

[0038] The piezoelectric ceramic in the utility model can be at least one of piezoelectric ceramic PZT-5B, piezoelectric ceramic PZT-5H, piezoelectric ceramic PZT-5A and the like.

[0039] In the utility model, the thickness of the impedance matching layer is an integral multiple of 1 / 4 of the wavelength generated by the driving frequency of the piezoelectric ceramic, and the thickness of the impedance matching layer is the thickness of the thickest part of the impedance matching layer.

[0040] The overall thickness of the medium-pressure electric ultrasonic sensor of the utility model is about 4-6 mm.

[0041] Example 1

[0042] See also Figure 2 , 3 The utility model provides a technical solution: a urination warning device based on ultrasound and posture detection, including a piezoelectric ultrasonic sensor and an IMU module, the IMU module is used for posture detection, and the piezoelectric ultrasonic sensor is used to monitor changes in bladder volume.

[0043] IMU (Inertial Measurement Unit) is a sensor system. The IMU module integrates a three-axis gyroscope, a three-axis accelerometer, and a three-axis magnetometer. In this embodiment, the IMU module uses a combination of MPU-6050 and MPU-6000. The 9-axis sensor can predict the state of the human body in real time by monitoring the tilt angle and dynamic changes of the torso.

[0044] The piezoelectric ultrasonic sensor includes a backing layer 1, a piezoelectric ceramic 2, an impedance matching layer 3 and a flexible bonding layer 4. The generation and reception of ultrasonic waves are performed by piezoelectric ceramic PZT-5B. A through groove is arranged in the center of the flexible bonding layer 4 for embedding the impedance matching layer 3. One side of the impedance matching layer 3 is a plane, and the other side is an arc-shaped surface. The arc-shaped surface is provided with a plurality of grooves at different angles to the horizontal plane. A piezoelectric ceramic 2 is fixed in each groove. The axes of all piezoelectric ceramics are parallel to each other. The angles between each piezoelectric ceramic and the horizontal plane are different, and the angles gradually increase from one side to the other side. When worn near the lower part of the navel, all piezoelectric ceramics are arranged from top to bottom, and the generated signals can cover the deformation area of ​​the bladder.

[0045] The backing layer 2 is solidified on the surface of all piezoelectric ceramics. The backing layer 2 can be in close contact with the piezoelectric ceramics and the impedance matching layer 3. An elastic material such as rubber can be selected to be pressed and solidified on the side of the impedance matching layer 3 with the piezoelectric ceramics.

[0046] When worn, the flexible fitting layer 4 fits the human body, the plane side of the impedance matching layer is exposed on the surface of the through groove of the flexible fitting layer, and the plane side is flush with the through groove. When monitoring, ultrasonic coupling gel is applied to the plane side. A circuit board is fixed on the backing layer 1, the IMU module is embedded in the circuit board, and the signal line of the piezoelectric ceramic is connected to the circuit board.

[0047] A data acquisition module and a wireless module are arranged on the circuit board. The wireless module is used to communicate with the terminal and perform preprocessing and urination warning at the terminal.

[0048] Example 2

[0049] In this embodiment, the piezoelectric ceramic adopts piezoelectric ceramic PZT-5B, which has four piezoelectric ceramics. The impedance matching layer is provided with grooves with different inclination angles. The four piezoelectric ceramics are pasted in the grooves so that the four piezoelectric ceramics are arranged in arrays at different angles. In this embodiment, Figure 2 From left to right, the angles are set to -20°, -10°, 0°, and 10° respectively. When in use, the piezoelectric ceramic at -20° is on the top and the piezoelectric ceramic at 10° is on the bottom. The generated signals are arranged from top to bottom to cover the deformation area of ​​the bladder.

[0050] When piezoelectric ceramics and the impedance matching layer are pasted together, the original slurry of the impedance matching layer before curing is used as a bonding agent, and the two are fixed together after the bonding agent is cured. The piezoelectric ceramics arranged at four different angles can collect signals from four directions.

[0051] Example 3

[0052] In this embodiment, the length of the impedance matching layer is 14 mm and the thickness is 2.5 mm. The urination warning device based on ultrasound and posture detection also includes a shell, which wraps the circuit board, the backing layer 1, the piezoelectric ceramic 2 and the impedance matching layer 3. The shell is also provided with a power switch button for controlling the opening and closing of the device.

[0053] Example 4

[0054] In this embodiment, the shell is a rectangular parallelepiped with an open end. The overall size of the rectangular parallelepiped is 65mm*40mm*22mm. The open end is sealed and connected to the flexible bonding layer 4. A data acquisition module, an AD conversion module, a Bluetooth module and a power supply are arranged on the circuit board. The Bluetooth module is used for data transmission. The Bluetooth module communicates with the terminal and displays the urination level and warning information on the terminal.

[0055] The terminal is a mobile phone APP.

[0056] In the utility model, the upper and lower positions are marked on the housing of the device, and the upper position refers to the side where the piezoelectric ceramic with the largest tilt angle is located, and the lower position is the opposite.

[0057] Example 5

[0058] The present embodiment also includes a bonding sheet, which is attached to a specified position of the human body. A limiting through groove is provided on the bonding sheet, and the limiting through groove can limit the installation position of the detection end composed of the shell and the flexible bonding layer. The bonding sheet is fixed on the human body. The detection end composed of the shell and the flexible bonding layer can be directly aligned with the specified position when the user temporarily removes it and continues to monitor when it is used again.

[0059] The usage process of this embodiment is: first use your fingers to find the first hardest bone (pubic bone) below the navel, put the index finger and ring finger together, with the ring finger located at the pubic bone, and the position of the index finger is the position of the lower edge of the detection end, stick the bonding sheet to the found position, then apply ultrasonic coupling gel on the impedance matching layer exposed on the surface of the flexible bonding layer 4, and finally place the detection end in the limiting groove of the bonding sheet according to the upper and lower positions.

[0060] The working principle of the utility model is as follows: when using the urination warning device based on ultrasound and posture detection, take out the detection end, wear it correctly on the human body, press the power switch, turn on the power, and the device with urination warning and human posture detection can work; the piezoelectric ceramic generates and receives ultrasonic signals, and the IMU module starts to collect posture-related parameters, that is, real-time monitoring and testing begins. The device is more convenient and comfortable to use.

[0061] After the person being tested wears the electronic skin in the correct position, the piezoelectric ultrasonic sensor obtains the information of the bladder volume expansion, and the IMU module obtains the posture information of the person being tested, which is transmitted to the upper computer mobile phone through the data acquisition module, data processing AD conversion module, and data transmission Bluetooth module on the circuit board. The mobile phone APP determines the current human posture as sitting, standing or walking based on the parameters transmitted by Bluetooth, and adopts different bladder estimation methods according to different postures. The specific bladder size estimation can be determined according to existing technology or experiments. According to the threshold value set in advance (the threshold value can be set according to experience or input by the user), the current urination level is divided, and whether an early warning occurs is determined according to the level, and real-time feedback or warning can be provided when there is an intention to urinate. Provide timely urination disposal information for nursing staff and related medical workers, and provide data analysis templates and parameter indicator systems for application research based on piezoelectric ultrasound.

[0062] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0063] The above describes in detail the preferred specific embodiments of the utility model. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

[0064] Anything not described in the present invention is applicable to the prior art.

Claims

1. A urination warning device based on ultrasound and posture detection, characterized in that: The early warning device includes a piezoelectric ultrasonic sensor and an IMU module, the IMU module is used for posture detection, and the piezoelectric ultrasonic sensor is used to monitor changes in bladder volume; The piezoelectric ultrasonic sensor and the IMU module are integrated on a detection end, and the detection end is worn in the area between the pubic bone and the navel of the human body.

2. The early warning device according to claim 1, characterized in that: The piezoelectric ultrasonic sensor comprises a backing layer, a piezoelectric ceramic, an impedance matching layer and a flexible bonding layer. A through groove is arranged at the center of the flexible bonding layer for embedding the impedance matching layer. One side of the impedance matching layer is a plane, and the other side is an arc-shaped surface. The arc-shaped surface is provided with a plurality of grooves with different angles to the horizontal plane. A piezoelectric ceramic is fixed in each groove. The axes of all piezoelectric ceramics are parallel to each other. The angles between each piezoelectric ceramic and the horizontal plane are different, and the angles gradually increase from one side to the other side. When worn near the lower part of the navel, all piezoelectric ceramics are arranged from top to bottom, and the generated signal can cover the deformation area of ​​the bladder. A backing layer is arranged on the surface of all piezoelectric ceramics, and the backing layer can be closely attached to the piezoelectric ceramics and the impedance matching layer; The flexible fitting layer fits the human body, the plane side of the impedance matching layer is exposed on the through-slot surface of the flexible fitting layer, and the plane side is flush with the through-slot. A circuit board is fixed on the backing layer, an IMU module is embedded on the circuit board, and a signal line of the piezoelectric ceramic is connected to the circuit board. A data acquisition module and a wireless module are arranged on the circuit board. The wireless module is used to communicate with a terminal, and the terminal is used for urination warning.

3. The early warning device according to claim 2, characterized in that: The backing layer is made of rubber material, and the side of the backing layer facing the impedance matching layer matches the shape of the impedance matching layer and the piezoelectric ceramics after arrangement.

4. The early warning device according to claim 2, characterized in that: The piezoelectric ceramic adopts at least one of piezoelectric ceramic PZT-5B, piezoelectric ceramic PZT-5H, and piezoelectric ceramic PZT-5A. The thickness of the impedance matching layer is an integer multiple of 1 / 4 of the wavelength generated by the driving frequency of the piezoelectric ceramic. The thickness of the impedance matching layer is the thickness of the thickest part of the impedance matching layer. The overall thickness of the piezoelectric ultrasonic sensor is 4-6mm.

5. The early warning device according to claim 2, characterized in that: The piezoelectric ceramic adopts piezoelectric ceramic PZT-5B or piezoelectric ceramic PZT-5H, which has four piezoelectric ceramics. The impedance matching layer is provided with grooves with different inclination angles. The four piezoelectric ceramics are applied in the grooves, so that the four piezoelectric ceramics are arranged in arrays at different angles. The angles are set to -20°, -10°, 0°, and 10° from left to right. When in use, the piezoelectric ceramic at -20° is on the top and the piezoelectric ceramic at 10° is on the bottom. The generated signals are arranged from top to bottom to cover the deformation area of ​​the bladder.

6. The early warning device according to claim 2, characterized in that: The piezoelectric ceramic and the impedance matching layer are fixed together by a binder, and the binder is the original slurry of the impedance matching layer before solidification.

7. The early warning device according to claim 2, characterized in that: The early warning device also includes a shell, which wraps the circuit board, the backing layer, the piezoelectric ceramics and the impedance matching layer. The shell is also provided with a power switch button.

8. The early warning device according to claim 7, characterized in that: The shell is a rectangular parallelepiped with an open end, and the open end is sealed and connected to the flexible bonding layer. The circuit board is provided with a data acquisition module, an AD conversion module, a Bluetooth module and a power supply. The Bluetooth module is used for data transmission. The Bluetooth module communicates with the terminal, and the urination level and warning information are displayed on the terminal. The upper and lower positions are marked on the shell, and the upper side refers to the side where the piezoelectric ceramic with the largest tilt angle is located.

9. The early warning device according to claim 8, characterized in that: The terminal is a mobile phone APP.

10. The early warning device according to claim 1, characterized in that: The early warning device also includes a bonding sheet, on which a limiting through slot is arranged, and the limiting through slot can limit the installation position of the detection end, and the bonding sheet is fixed on the human body.

11. The early warning device according to any one of claims 1 to 10, characterized in that: The IMU module is a combination of MPU-6050 and MPU-6000.

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