CN210204713U - Blood pressure monitoring system - Google Patents
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- CN210204713U CN210204713U CN201920477144.4U CN201920477144U CN210204713U CN 210204713 U CN210204713 U CN 210204713U CN 201920477144 U CN201920477144 U CN 201920477144U CN 210204713 U CN210204713 U CN 210204713U
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Abstract
The utility model discloses a blood pressure monitoring system, the utility model provides a blood pressure monitoring system, pressure sensor's intermediate level is provided with a plurality of through-holes, has strengthened the flexibility of sensor, can carry out bigger deformation when measuring, still can be better with the skin laminating of the volume department of awaiting measuring to improve its sensitivity, ensure measuring result's accuracy, consequently, based on the blood pressure measuring result of the high pressure sensor's of precision blood pressure monitoring system is more accurate, has overcome the technical problem that the precision that exists blood pressure monitoring equipment among the prior art is low.
Description
Technical Field
The utility model belongs to the technical field of blood pressure and specifically relates to a blood pressure monitoring system.
Background
The Pulse (English: Pulse) is the palpable arterial Pulse on the body surface. The circulatory system of the human body is composed of the heart, blood vessels and blood and is responsible for the transportation of oxygen, carbon dioxide, nutrients and wastes. The blood is squeezed into the aorta by the contraction of the left ventricle of the heart and then delivered to the systemic arteries. The artery is a conduit formed by connective tissues and muscles with high elasticity. When a large amount of blood enters the artery, the pressure of the artery increases and the caliber expands, so that the artery feels the expansion at a shallow body surface, namely the pulse.
With the improvement of living standard of people, people pay more and more attention to health, various detection devices are in endless, and the known blood pressure obtaining device based on pulse wave has the defect of low measurement precision, so that improvement is needed.
SUMMERY OF THE UTILITY MODEL
The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, the utility model discloses an aim at provides a blood pressure monitoring system that measurement accuracy is high.
The utility model adopts the technical proposal that:
the utility model provides a blood pressure monitoring system, including pressure sensor, signal processing module, microprocessor, display module and/or wireless data transmission module, pressure sensor includes first electret layer, second electret layer, intermediate level, first electrode layer and second electrode layer, the intermediate level is fixed in between first electret layer and the second electret layer, first electrode layer is fixed in on the first electret layer, the second electrode layer is fixed in on the second electret layer, be equipped with a plurality of through-holes on the intermediate level;
the pressure sensor is in contact with the radial artery of the monitored person to acquire pulse wave signals under different pulse-taking static pressures, and the signal processing module is used for processing the output signal of the pressure sensor; the first electrode layer and the second electrode layer are connected with the input end of the signal processing module, the output end of the signal processing module is connected with the input end of the microprocessor, the output end of the microprocessor is connected with the input end of the display module, and the microprocessor is connected with the wireless data transmission module.
Furthermore, the blood pressure monitoring system also comprises a wrist strap or a cuff and an automatic pressurizing module, the microprocessor is connected with the automatic pressurizing module, the output end of the automatic pressurizing module is connected with the input end of the wrist strap or the input end of the cuff, and the wrist strap or the cuff is used for applying the pulse-feeling static pressure.
Furthermore, the blood pressure monitoring system also comprises a static pressure sensor for acquiring the size of the pulse feeling static pressure, and the output end of the static pressure sensor is connected with the input end of the microprocessor.
Further, the pressure sensors include a first pressure sensor, a second pressure sensor and a third pressure sensor, and the first pressure sensor, the second pressure sensor and the third pressure sensor are respectively arranged at the cun-guan-chi position of the radial artery of the wrist.
Furthermore, the blood pressure monitoring system also comprises an intelligent terminal, and the wireless data transmission module is connected with the intelligent terminal.
Further, the intelligent terminal comprises a mobile phone or a computer.
Furthermore, the signal processing module comprises a signal amplifying circuit and a filter circuit, the first electrode layer and the second electrode layer are both connected with the input end of the signal amplifying circuit, and the output end of the signal amplifying circuit is connected with the input end of the filter circuit.
Further, the signal amplifying circuit comprises a preamplifier and/or an instrument amplifier and/or a right leg driving circuit and/or a phase-locked amplifier.
Further, the filter circuit includes a notch filter circuit and/or a low pass filter circuit.
Further, the wireless data transmission module comprises a Wifi module or a 2G mobile communication circuit or a 3G mobile communication circuit or a 4G mobile communication circuit or a 5G mobile communication circuit.
The utility model has the advantages that:
the utility model discloses a blood pressure monitoring system, pressure sensor's intermediate level is provided with a plurality of through-holes, has strengthened the flexibility of sensor, can carry out bigger deformation when measuring, still can be better with the skin laminating of the volume of awaiting measuring department to improve its sensitivity, ensure measuring result's accuracy, consequently, the blood pressure measurement result based on pressure sensor's that the precision is high blood pressure monitoring system is more accurate, has overcome the technical problem that the precision that exists blood pressure monitoring equipment among the prior art is low.
Drawings
Fig. 1 is a block diagram of a blood pressure monitoring system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a pressure sensor of a blood pressure monitoring system according to an embodiment of the present invention;
fig. 3 is a top view of an embodiment of a pressure sensor of a blood pressure monitoring system according to the present invention;
FIG. 4 is a cross-sectional view taken along A-A of FIG. 3;
fig. 5 is a schematic structural diagram of an embodiment of an intermediate layer of a pressure sensor of a blood pressure monitoring system according to the present invention;
fig. 6 is a flowchart illustrating the operation of an embodiment of the blood pressure detecting system of the present invention;
FIG. 7 is a schematic diagram of the pulse-feeling static pressure variation of an embodiment of the blood pressure detecting system of the present invention;
fig. 8 is a schematic diagram of an amplitude curve of pulse feeling static pressure-pulse wave signals according to an embodiment of the blood pressure detecting system of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Referring to fig. 1, fig. 1 is a block diagram of a blood pressure monitoring system according to an embodiment of the present invention; the blood pressure monitoring system comprises a pressure sensor, a signal processing module, a microprocessor, a display module, a wireless data transmission module, a wrist strap or cuff, a static pressure sensor, an automatic pressurizing module, a data storage module, an energy supply module and an intelligent terminal, wherein the display module adopts a liquid crystal display module in the embodiment.
Specifically, the microprocessor is connected with the data storage module to store measurement data, the energy supply module is connected with the microprocessor to supply power to the microprocessor, the microprocessor is connected with the automatic pressurization module to realize automatic and continuous pressure regulation, the output end of the automatic pressurization module is connected with the input end of a wrist strap or the input end of a cuff, and the wrist strap or the cuff is used for applying pulse-feeling static pressure; the static pressure sensor is used for acquiring the size of pulse feeling static pressure, and the output end of the static pressure sensor is connected with the input end of the microprocessor; the pressure sensor is contacted with the radial artery of the monitored person to obtain pulse wave signals under different pulse feeling static pressures, and the signal processing module is used for processing the output signals of the pressure sensor and comprises signal amplification and filtering processing; the output end of the signal processing module is connected with the input end of the microprocessor, the output end of the microprocessor is connected with the input end of the display module, the microprocessor is connected with the wireless data transmission module, and the wireless data transmission module is connected with the intelligent terminal. Wherein, referring to fig. 2, fig. 3 and fig. 4, fig. 2 is a schematic structural view of a specific embodiment of the pressure sensor of the blood pressure monitoring system of the present invention; fig. 3 is a top view of an embodiment of a pressure sensor of a blood pressure monitoring system according to the present invention; FIG. 4 is a cross-sectional view taken along A-A of FIG. 3; the pressure sensor is a flexible pressure sensor, and the flexible pressure sensor comprises an intermediate layer 1, a first electret layer 2, a second electret layer 3, a first electrode layer 4 and a second electrode layer 5. The intermediate layer 1 is fixed between the first electret layer 2 and the second electret layer 3. The first electrode layer 4 is fixed to the outer surface of the first electret layer 2, and the second electrode layer 5 is fixed to the outer surface of the second electret layer 3. The middle layer 1 is provided with a plurality of through holes 11, and wires are respectively led out from the first electrode layer 4 and the second electrode layer 5 and are connected with the input end of the signal processing module.
Referring to FIG. 4, the thickness of the intermediate layer 1 is in the range of 100-500. mu.m, and preferably 150. mu.m. The thickness of the first electret layer 2 and the second electret layer 3 is in the range of 10 to 50 μm. The thickness of the first electrode layer 4 was 50nm and the thickness of the second electrode layer 5 was 10 μm. It can be seen that the thickness of the entire flexible pressure sensor is extremely small.
Referring to fig. 4, in manufacturing the flexible pressure sensor, the intermediate layer 1 is perforated, and is subjected to surface modification and then chemically bonded to the first electret layer 2 and the second electret layer 3. A thin Au layer was coated on the outer surface of the first electret layer 2 by a magnetron sputtering method to form the first electrode layer 4. An Al tape is adhered to the outer surface of the second electret layer 3 to form the second electrode layer 5 and to serve as a mechanical support for the top layers thereof. The atmospheric electric dipole is formed by a high voltage corona charging method using a high voltage power supply (dc high voltage), a corona pin and a ground electrode. After bonding is completed, a large amount of air remains in the through-hole 11 in the intermediate layer 1. And placing the semi-finished product on the top of the grounding electrode and 3cm below the corona needle point. A high voltage of 15-30kV is applied to the corona needle to ionize the air inside the through-hole 11. The ionized free charges are captured by the inner surfaces of the first electret 2 and the second electret 3 because the electrets have good electrostatic charge storage capacity and can stably store charges for a long time. The first electret 2 and the second electret 3 are similar to a capacitor which takes air in a through hole as a medium. Because C is Q/U is epsilon S/d. When pressure is applied to the sensor, the intermediate layer 1 is compressed to reduce the through hole 11 therein, which corresponds to a reduction in the distance d between the two plates, thereby reducing the capacitance C. Since the quantity Q of electricity charged on the first electret 2 and the second electret 3 is not changed, the voltage U in the external circuit is changed, so as to realize the conversion between the mechanical deformation and the electrical signal.
Referring to fig. 5, fig. 5 is a schematic structural view of an embodiment of an intermediate layer of a pressure sensor of a blood pressure monitoring system according to the present invention; a plurality of through holes 11 are uniformly distributed on the middle layer 1. The porosity of the intermediate layer 1 is 10-70%. The diameter range of the through holes 11 is 1-5mm, and the center-to-center distance range of the adjacent through holes 11 is 1.2-30 mm. Preferably, the diameter of the through holes 11 is 2mm, and the center-to-center distance between adjacent through holes is 3 mm. The shape of the through hole 11 is preferably circular, but may be a regular polygon or other irregular shape. For regular polygonal holes or other irregularly shaped holes, the diameter of the hole is based on the diameter of the inscribed circle. The material of the intermediate layer 1 may be selected from, but not limited to, ultra-soft addition-curing silicone such as Ecoflex, silicone rubber such as Polydimethylsiloxane (PDMS), thermoplastic elastomer such as styrene block copolymer (SEBS), and silicone rubber such as platinum-curing liquid silicone compound (DragonSkin). The middle layer 1 is made of the material with good flexibility, and the through holes 11 are formed to further enhance the flexibility of the middle layer. The manufactured sensor has good flexibility, can be designed and processed into different shapes according to different application occasions, can be deformed greatly during measurement, and can be better attached to the skin of a position to be measured so as to improve the sensitivity and ensure the accuracy of a measurement result. Therefore, refer to fig. 1, the utility model discloses a blood pressure monitoring system, owing to have the high pressure sensor of precision, blood pressure monitoring system's blood pressure measurement result is more accurate, has overcome the technical problem that the precision that exists blood pressure monitoring equipment is low among the prior art. The pulse wave signals measured by the pressure sensor are processed by the signal processing module and then input into the microprocessor for processing, the blood pressure data of a monitored person can be obtained after processing, the blood pressure data are stored in the data storage module and displayed on the liquid crystal display module, meanwhile, the blood pressure data can also be transmitted to the intelligent terminal for checking through the wireless data transmission module, the intelligent terminal comprises a mobile phone or a computer, the wireless data transmission module comprises a Wifi module or a 2G mobile communication circuit or a 3G mobile communication circuit or a 4G mobile communication circuit or a 5G mobile communication circuit, the mobile terminals such as the mobile phone and the like can directly establish communication connection with the wireless data transmission module through networking to receive the measured blood pressure data, and the computer arranged at medical sites such as hospitals and the like can establish communication connection with the wireless data transmission module through the mobile terminals such as the mobile phone and the like, and then blood pressure data is acquired and stored.
Further, the signal processing module is used for amplifying signals and eliminating human body common mode signals, 50Hz mains supply interference and the like. Specifically, the signal processing module comprises a signal amplification circuit and a filter circuit, the first electrode layer and the second electrode layer are both connected with the input end of the signal amplification circuit, and the output end of the signal amplification circuit is connected with the input end of the filter circuit. The signal amplifying circuit comprises a preamplifier and/or an instrument amplifier and/or a right leg driving circuit and/or a phase-locked amplifier. The filter circuit includes a notch filter circuit (e.g., a 50Hz notch circuit) and/or a low pass filter circuit, which may be a passive RLC network analog circuit, an active analog circuit using an operational amplifier, etc., or a digital filter circuit. And the microprocessor comprises a singlechip and other processors.
Referring to fig. 1 and 6, fig. 6 is a flowchart illustrating the operation of an embodiment of the blood pressure detecting system according to the present invention; the working process of the blood pressure detection system is as follows:
first, a pressure sensor is attached to the inner side of the cuff or the wrist band to be connected to the radial artery of the wrist of the monitored person. In this embodiment, in order to simulate a traditional Chinese medical pulse diagnosis method for measuring blood pressure, the pressure sensors include a first pressure sensor, a second pressure sensor and a third pressure sensor, and the first pressure sensor, the second pressure sensor and the third pressure sensor are respectively disposed at the cunguan-chi position of the radial artery of the wrist, so as to measure pulse waves of the cunguan-chi pulse points.
After the work is started, firstly applying strong pressure to the cuff/wrist band to completely block arterial blood flow, then adjusting the automatic pressurizing module to gradually reduce the pressure in the cuff/wrist band cavity, when the pressure sensor for measuring the pulse wave has reading output, the fact that blood flow flows is indicated, and at the moment, the microprocessor can acquire the pulse wave signal after signal processing; and continuously and gradually reducing the pressure in the cuff/wrist band cavity until the atmospheric pressure or a certain preset value, and finishing the measurement. Referring to fig. 7, fig. 7 is a schematic diagram of pulse feeling static pressure variation of an embodiment of a blood pressure detecting system of the present invention; the change in pressure in the cuff/wristband cavity, i.e. the pulse-taking static pressure, throughout the automatic compression process is shown in figure 7; in order to reduce power consumption, the microprocessor can be set to power off or be in a dormant state after the measurement is finished.
The microprocessor acquires an amplitude curve of pulse-feeling static pressure-pulse wave signals and an upper envelope line and a lower envelope line of the amplitude curve of the pulse-feeling static pressure-pulse wave signals according to the pulse wave signals; referring to fig. 8, fig. 8 is a schematic diagram of an amplitude curve of the pulse-feeling static pressure-pulse wave signal according to an embodiment of the blood pressure detecting system of the present invention, the curve in fig. 8 is the amplitude curve of the pulse-feeling static pressure-pulse wave signal, the abscissa is the pulse-feeling static pressure, the ordinate is the amplitude of the pulse wave signal, and the dotted lines in fig. 8 are the upper envelope line and the lower envelope line of the amplitude curve of the pulse-feeling static pressure-pulse wave signal, respectively.
Acquiring the pulse-feeling static pressure corresponding to the maximum value of the amplitude between the upper envelope line and the lower envelope line as the mean arterial pressure, such as the pulse-feeling static pressure at the point a in fig. 8; and acquiring corresponding pulse-feeling static pressure as diastolic pressure and systolic pressure according to the maximum value of the amplitude between the upper envelope line and the lower envelope line, the first preset proportion and the second preset proportion. In this embodiment, the maximum value of the amplitude between the upper envelope and the lower envelope is an amplitude (hereinafter referred to as a maximum amplitude) between the upper envelope and the lower envelope corresponding to point a; taking the first preset proportion as 85% and the second preset proportion as 55% as an example, obtaining pulse-feeling static pressure corresponding to a plurality of intersection positions of the maximum amplitude of 85% and the envelope (namely, positions between the upper envelope and the lower envelope where the amplitude is 85% of the maximum amplitude), wherein the pressure value with the minimum value (namely, low pressure) of the pulse-feeling static pressure is diastolic pressure (namely, point B); and acquiring pulse-feeling static pressure corresponding to a plurality of intersection positions of 55% of the maximum amplitude and the envelope lines (namely, positions between the upper envelope line and the lower envelope line, where the amplitude is 55% of the maximum amplitude), wherein the pressure value with the maximum value (namely, the high pressure) of the pulse-feeling static pressure is systolic pressure (namely, a point C). At this point, the measurement of the blood pressure is completed, and the mean arterial pressure, diastolic pressure and systolic pressure are acquired as blood pressure data. In addition, in this embodiment, 3 pulse wave signals can be acquired at three positions of the inch, the scale and the scale, and each pulse wave signal is processed according to the processing flow, so that finally 9 pieces of pressure data can be acquired. The blood pressure monitoring system obtains the blood pressure by utilizing an oscillography, has high signal processing speed and can quickly obtain the blood pressure result of a monitored person.
While the preferred embodiments of the present invention have been described, the present invention is not limited to the embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined by the appended claims.
Claims (10)
1. A blood pressure monitoring system is characterized by comprising a pressure sensor, a signal processing module, a microprocessor, a display module and/or a wireless data transmission module, wherein the pressure sensor comprises a first electret layer, a second electret layer, an intermediate layer, a first electrode layer and a second electrode layer, the intermediate layer is fixed between the first electret layer and the second electret layer, the first electrode layer is fixed on the first electret layer, the second electrode layer is fixed on the second electret layer, and a plurality of through holes are formed in the intermediate layer;
the pressure sensor is in contact with the radial artery of the monitored person to acquire pulse wave signals under different pulse-taking static pressures, and the signal processing module is used for processing the output signal of the pressure sensor; the first electrode layer and the second electrode layer are connected with the input end of the signal processing module, the output end of the signal processing module is connected with the input end of the microprocessor, the output end of the microprocessor is connected with the input end of the display module, and the microprocessor is connected with the wireless data transmission module.
2. The system of claim 1, further comprising a wrist band or cuff and an auto-pressurizing module, wherein the microprocessor is connected to the auto-pressurizing module, wherein an output of the auto-pressurizing module is connected to an input of the wrist band or an input of the cuff, and wherein the wrist band or cuff is configured to apply the pulse-taking static pressure.
3. The system of claim 2, further comprising a static pressure sensor for obtaining the magnitude of the pulse-taking static pressure, wherein an output of the static pressure sensor is connected to an input of the microprocessor.
4. The system of claim 1, wherein the pressure sensors comprise a first pressure sensor, a second pressure sensor, and a third pressure sensor, the first pressure sensor, the second pressure sensor, and the third pressure sensor being respectively disposed at a cun-guan position of a radial artery of the wrist.
5. The blood pressure monitoring system according to any one of claims 1 to 4, further comprising an intelligent terminal, wherein the wireless data transmission module is connected with the intelligent terminal.
6. The blood pressure monitoring system of claim 5, wherein the smart terminal comprises a cell phone or a computer.
7. The blood pressure monitoring system according to any one of claims 1 to 4, wherein the signal processing module comprises a signal amplifying circuit and a filter circuit, the first electrode layer and the second electrode layer are both connected to an input terminal of the signal amplifying circuit, and an output terminal of the signal amplifying circuit is connected to an input terminal of the filter circuit.
8. A blood pressure monitoring system according to claim 7 wherein the signal amplification circuit comprises a preamplifier and/or an instrumentation amplifier and/or a right leg driver circuit and/or a lock-in amplifier.
9. A blood pressure monitoring system according to claim 7, wherein the filter circuit comprises a notch filter circuit and/or a low pass filter circuit.
10. The blood pressure monitoring system according to any one of claims 1 to 4, wherein the wireless data transmission module comprises a Wifi module or a 2G mobile communication circuit or a 3G mobile communication circuit or a 4G mobile communication circuit or a 5G mobile communication circuit.
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