CN-122004778-A - Sensor for quantitatively detecting skin expansion degree and manufacturing method thereof

Abstract

The invention discloses a sensor for quantitatively detecting skin expansion degree and a manufacturing method thereof, belonging to the field of medical appliances, wherein the sensor comprises an outer fixed layer and an inner layer part; the inner layer component is arranged in the outer fixing layer and comprises a packaging layer, a magnetic vibrator layer and a capacitance sensor; the magnetic vibrator applies constant pressure to the capacitive sensor under the action of an external magnetic field, the capacitive sensor consists of two electrode plates and a cylindrical dielectric with a conical protrusion on one side, the electrode plates are connected with a lead and led out, the magnetic vibrator applies pressure to the capacitive sensor under the action of the external magnetic field to change the distance between the electrode plates and output a capacitive signal related to the pressure, so that the quantitative detection of the skin expansion degree is realized.

Inventors

• YI FANG
• LI HONGLONG
• MA XIAOXIAO

Assignees

• 中山大学

Dates

Publication Date

20260512

Application Date

20260323

Claims (10)

1. 1. A sensor for quantitatively detecting the degree of skin distension, comprising: The external fixing layer is annular and is used for adhering to the surface of human skin; the inner layer part is arranged inside the outer fixing layer and comprises an encapsulation layer, a magnetic vibrator and a capacitance sensor; The packaging layer is fixedly connected with the outer fixing layer, and the magnetic vibrator and the capacitance sensor are arranged in a space surrounded by the packaging layer; the magnetic vibrator applies constant pressure to the capacitive sensor under the action of an external magnetic field; The capacitive sensor comprises two electrode plates and a dielectric part arranged between the two electrode plates, wherein the electrode plates are connected with a wire extending out of the outer fixing layer, and the dielectric part is provided with a plurality of conical protrusions.
2. 2. The sensor for quantitatively detecting skin distension according to claim 1, wherein the magnetic vibrator comprises a magnet, a circular ring-shaped package surrounding the magnet, and a metal coil provided on an outer bottom surface of the magnet.
3. 3. The sensor for quantitatively detecting skin distension according to claim 2, wherein the magnetic vibrator is a device capable of applying pressure of different magnitudes to the capacitive sensor by adjusting the intensity of the externally applied magnetic field.
4. 4. The sensor for quantitatively detecting skin distension according to claim 1, wherein the capacitive sensor is a device for outputting an electrical signal in linear correlation with the applied pressure under different pressures.
5. 5. The sensor for quantitatively detecting skin distension according to claim 4, wherein said electrical signal is an absolute capacitance value of said capacitive sensor.
6. 6. The sensor for quantitatively detecting skin distension according to claim 1, wherein a conductive spray layer is disposed on a side of the electrode plate facing away from the dielectric, and the conductive spray layer is electrically connected to the conductive wire.
7. 7. The sensor for quantitatively detecting skin distension according to claim 1, wherein the tips of the plurality of the cone-shaped protrusions face the disposition area of the magnetic vibrator.
8. 8. The sensor for quantitatively detecting skin distension according to claim 1, wherein the sealing material of the outer fixing layer and the sealing material of the inner member are made of a material having adhesiveness, and wherein the Young's modulus of the sealing material of the outer fixing layer is larger than that of the sealing material of the inner member.
9. 9. The sensor for quantitatively detecting skin distension according to claim 1, wherein the dielectric is made of an insulating material and a highly conductive material is added thereto.
10. 10. A method for manufacturing a sensor for quantitatively detecting the skin expansion degree is characterized by comprising the following steps, Preparing dielectric substance by pouring liquid insulating material with high conductive material into mould, solidifying to form the dielectric substance with taper-shaped protuberance on one side; preparing an electrode plate, namely forming the electrode plate after the curing by spin coating of a liquid polyurethane solution, performing metal spraying treatment on one side of the electrode plate, and bonding and leading out the electrode plate through conductive silver paste and a wire; Assembling a capacitive sensor, namely assembling the electrode plate and the dielectric substance to form the capacitive sensor; Preparing a circular package, namely pouring a polydimethylsiloxane solution into a mold, and curing to form the circular package; Assembling the magnet, the metal coil and the circular ring-shaped package to form a magnetic vibrator; placing the magnetic vibrator above the capacitive sensor, placing the capacitive sensor into a mold, pouring packaging materials, and curing to form an inner layer component; and (3) smearing an adhesive on the inner side of the outer fixing layer, placing the inner layer part into the outer fixing layer, and bonding to obtain the sensor for quantitatively detecting the skin expansion degree.

Description

Sensor for quantitatively detecting skin expansion degree and manufacturing method thereof Technical Field The invention relates to the technical field of quantitative detection of skin expansion degree, in particular to a sensor for quantitative detection of skin expansion degree and a manufacturing method thereof. Background With the continuous development of medical cosmetology and repair surgery, skin expansion technology has been widely applied to the fields of repair after burn, skin reconstruction after scar excision, plastic surgery and the like. The technique is to obtain enough healthy skin for repairing a defective area by implanting a skin expander around the skin area in need of repair and causing skin tissue to gradually expand by external force. At present, most of the skin dilators commonly used in clinic are controllable dilators, and a doctor is relied on to regularly inject physiological saline into the dilators to increase the volume of the dilators, so that continuous mechanical tension is applied to the skin to stimulate skin tissue proliferation. However, in the actual procedure, how to accurately judge the degree of skin distension still depends mainly on the clinical experience of doctors, and the distended state is usually evaluated by manually pressing the skin of the distended region, in combination with tactile sensation and visual observation. The method has strong subjectivity, lacks quantification standard, is difficult to realize accurate control, easily causes insufficient or excessive expansion, increases pain of patients, prolongs treatment period, and even causes complications such as skin necrosis. Therefore, there is a need for a device that can quantitatively detect the degree of skin distension to assist a physician in monitoring the skin condition in real time, improve the accuracy and safety of treatment, alleviate patient pain, and provide data support for personalized treatments. Disclosure of Invention The invention aims to provide a sensor for quantitatively detecting the skin expansion degree and a manufacturing method thereof, which are used for solving the problems that the expansion degree cannot be quantified, the judgment is dependent on the experience of doctors and objective monitoring means are lacked in the existing skin expansion technology. The invention provides a sensor for quantitatively detecting the skin expansion degree, which comprises an outer fixing layer, an inner layer part, a packaging layer, a magnetic vibrator and a capacitance sensor, wherein the outer fixing layer is annular and is used for being adhered to the surface of human skin, the inner layer part is arranged inside the outer fixing layer and comprises the packaging layer, the magnetic vibrator and the capacitance sensor, the packaging layer is fixedly connected with the outer fixing layer, the magnetic vibrator and the capacitance sensor are arranged in a space surrounded by the packaging layer, the magnetic vibrator applies constant pressure to the capacitance sensor under the action of an external magnetic field, the capacitance sensor comprises two electrode plates and a dielectric substance arranged between the two electrode plates, the electrode plates are connected with wires extending out of the outer fixing layer, and the dielectric substance is provided with a plurality of conical protrusions. In one embodiment, the magnetic vibrator comprises a magnet, a circular ring-shaped package surrounding the magnet, and a metal coil arranged on the bottom surface outside the magnet. In one embodiment, the magnetic vibrator is a device capable of applying different magnitudes of pressure to the capacitive sensor by adjusting the intensity of the externally applied magnetic field. In one embodiment, the capacitive sensor is a device that outputs an electrical signal that is linearly related to the pressure applied under different pressure. In one embodiment, the electrical signal is an absolute capacitance value of the capacitive sensor. In one embodiment, a conductive spray layer is disposed on a side of the electrode plate facing away from the dielectric, and the conductive spray layer is electrically connected with the conductive wire. In one embodiment, the tips of the plurality of the tapered protrusions face the arrangement region of the magnetic vibrator. In one embodiment, the packaging material of the outer fixing layer and the packaging material of the inner layer component are materials with adhesiveness, and the Young's modulus of the packaging material of the outer fixing layer is larger than that of the packaging material of the inner layer component. In one embodiment, the dielectric is an insulating material and is added with a highly conductive material. In order to solve the technical problems, the invention also provides a manufacturing method of the sensor for quantitatively detecting the skin expansion degree, which comprises the following steps, Preparing