CN210990254U - Blood pressure measuring device - Google Patents
Blood pressure measuring device Download PDFInfo
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- CN210990254U CN210990254U CN201920944427.5U CN201920944427U CN210990254U CN 210990254 U CN210990254 U CN 210990254U CN 201920944427 U CN201920944427 U CN 201920944427U CN 210990254 U CN210990254 U CN 210990254U
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Abstract
The utility model discloses a blood pressure measuring device, including main control unit, pressure sensor circuit, air pump and sleeve area, the pressure sensor circuit includes operational amplifier circuit, and the main control unit includes microprocessor and PID control circuit, wherein: the cuff is communicated with the air pump through an air pipe and is simultaneously communicated with the pressure sensor circuit through a cable; the pressure sensor circuit is communicated with the main control unit and outputs a pressure value and a pulse wave signal to the microprocessor through the operational amplification circuit; the main control unit is communicated with the air pump and outputs PWM signals to the air pump through a PID control circuit. The utility model discloses accelerated measuring time, improved measurement of efficiency and precision, strengthened user experience.
Description
Technical Field
The utility model relates to the technical field of medical equipment, especially, relate to a blood pressure measuring device.
Background
The blood pressure is an important index reflecting physiological parameters such as the heart pumping function, the vascular resistance, the blood viscosity, the systemic blood volume and the like, and has important clinical diagnosis value. The blood pressure reduction measurement comprises two stages of inflation and deflation, firstly, the cuff is inflated and pressurized until the artery is closed, and then, in the deflation process, a pressure shock wave signal in the cuff generated by arterial pulsation is collected; the pressure-boosting measurement only comprises one stage of inflation measurement, the pressure shock wave signals in the cuff are collected simultaneously in the cuff pressurization process, and once the measurement is completed, the cuff can be deflated quickly. The cuff is required to be rapidly inflated firstly for blood pressure reduction measurement, so that the cuff pressure is high enough to close the artery, and the pressure value corresponding to the inflation end is usually preset and cannot be automatically adjusted according to the specific condition of the measured blood pressure. When in measurement, if the preset pressure value is too high, the discomfort of the measured person can be increased; if too low, multiple inflation pressurization events may occur, even resulting in measurement failures.
Specifically, in the blood pressure measuring process in the prior art, because the blood pressure intervals of children, adults and the elderly are different, the fixedly set inflation speed and inflation quantity cannot adapt to each group of people, and further measurement data are inaccurate; and a user generally selects multiple times of measurement for obtaining more accurate data, so that the measurement time is prolonged, and the user experience is seriously influenced. Therefore, a blood pressure measuring device solving the above problems is desired.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a blood pressure measuring device for measuring time has improved measurement of efficiency and precision, has strengthened user experience.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a blood pressure measuring device, includes main control unit, pressure sensor circuit, air pump and sleeve area, and the pressure sensor circuit includes operational amplification circuit, and the main control unit includes microprocessor and PID control circuit, wherein: the cuff is communicated with the air pump through an air pipe and is simultaneously communicated with the pressure sensor circuit through a cable; the pressure sensor circuit is communicated with the main control unit and outputs a pressure value and a pulse wave signal to the microprocessor through the operational amplification circuit; the main control unit is communicated with the air pump.
The utility model provides a technical principle that its technical problem adopted is: the main control unit is used for controlling the air pump to inflate and deflate the cuff through the air pipe; as shown in fig. 3 and 4, the pressure sensor circuit includes a MPS3117 type pressure sensor and an SGM8594YTS14G/TR operational amplifier circuit, the pressure sensor respectively accesses a pressure value and a pulse wave signal through 5 interfaces and 2 interfaces and respectively transmits the signals to 16 interfaces and 17 interfaces in the microprocessor through 6 interfaces and 1 interface, during the transmission process, the operational amplifier circuit amplifies the signals, filters the signals to filter noise signals, transmits accurate analog signals to the microprocessor 201, and the microprocessor 201 converts the signals into digital signals; the digital signal comprises a pressure value signal, i.e. the pressure at time t is Pt and the pressure change at time t is apt＝Pt-Pt-1The PID control circuit 2 outputs a PWM signal with a duty ratio Dt according to the pressure change, wherein the calculation processing formula of the duty ratio is Dt＝KP*(SP-ΔPt)+KI*(∑(SP-ΔPt) SP is a set threshold value of the pressure variation, and then the microprocessor judges the blood pressure measuring process according to the pressure variation and the pressure value and outputs a PWM control signal to the air pump according to the pressure variation and the pressure value to automatically adjust the inflating speed and the inflating quantity.
The utility model provides a work principle that its technical problem adopted is: the pressure sensor circuit collects pressure and pulse signals, the signals are amplified, filtered and transmitted to the microprocessor 201 for Adc conversion, then pressure change calculation is carried out in the microprocessor 201 and the PID control circuit 202, PID operation is further carried out, and therefore PWM signals are output to control the air pump to adjust inflation in the cuff.
The beneficial effects of the utility model reside in that: in the process of measuring the blood pressure, automatic inflation adjustment according to different cuff and arm circumference is further realized through PID calculation, the range of the applicable population is wider, the working efficiency is improved, the measuring time is saved, the practicability is enhanced, and the use comfort level of a measurer is improved; through the pressure sensor circuit, the acquisition intensity of pulse waves is enhanced, the signal acquisition precision is improved, and the blood pressure measurement data is more accurate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below with reference to the accompanying drawings and embodiments, wherein the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work according to the drawings:
fig. 1 is a schematic diagram of a module structure of a blood pressure measuring device of the present invention;
FIG. 2 is a schematic structural view of a blood pressure measuring device of the present invention including a blood pressure measuring host;
fig. 3 is a circuit diagram of a main control unit in the blood pressure measuring device of the present invention;
FIG. 4 is a circuit diagram of a pressure sensor circuit in the blood pressure measuring device of the present invention;
fig. 5 is a circuit diagram of the voice module 204 of the blood pressure measuring device of the present invention;
fig. 6 is a circuit diagram of the communication module 203 of the blood pressure measuring device of the present invention;
fig. 7 is a circuit diagram of the driving chip 205 in the blood pressure measuring device of the present invention;
FIG. 8 is a circuit diagram of a control circuit of the air pump valve in the blood pressure measuring device of the present invention;
fig. 9 is an experimental data chart of the blood pressure measuring device of the present invention during blood pressure measurement.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, a clear and complete description will be given below with reference to the technical solutions of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
In embodiment 1, as shown in fig. 1, a blood pressure measuring apparatus includes a main control unit, a pressure sensor circuit, an air pump 17, and a cuff, the pressure sensor circuit includes an operational amplifier circuit, the main control unit includes a microprocessor 201 and a PID control circuit 202, wherein: the cuff is communicated with the air pump 17 through an air pipe and is simultaneously communicated with the pressure sensor circuit through a cable; the pressure sensor circuit is communicated with the main control unit and outputs a pressure value and a pulse wave signal to the microprocessor 201 through the operational amplification circuit; the main control unit is communicated with the air pump and outputs a PWM signal to the air pump through a PID control circuit 202.
Specifically, as shown in fig. 9, when the inflation speed is 4.5mmHg/s, the cuff for both adults and children is used, and the cuff for children is about 18.5s when used from 20mmHg to 100mmHg, the speed is about 4.3mmHg/s, and the cuff for adults is 19.5s, and the speed is about 4.1 mmHg/s. Therefore, in the process of measuring the blood pressure of different measurers, the inflation speed tends to be uniform, and the measurers can experience more comfortably in the process of measuring the blood pressure.
The beneficial effects of the utility model reside in that: in the process of measuring the blood pressure, automatic inflation adjustment according to different cuff and arm circumference is further realized through PID calculation, the range of the applicable population is wider, the working efficiency is improved, the measuring time is saved, the practicability is enhanced, and the use comfort level of a measurer is improved; through the pressure sensor circuit, the acquisition intensity of pulse waves is enhanced, the signal acquisition precision is improved, and the blood pressure measurement data is more accurate.
The blood pressure measuring device further comprises a blood pressure measuring host which comprises a bottom shell 11, a host front shell 18 and a host upper shell 19, the host upper shell 19 and the bottom shell 11 are respectively fixed at the top and the bottom of the host front shell 18, a L CD display screen 3 is embedded in the host upper shell 19, a L CD lens 1 is sealed at the top of the L CD display screen 3, a key assembly 2 is embedded at the edge of the top of the host upper shell, a L ED backlight sheet 4 is fixedly connected at the bottom of the host upper shell, a key circuit board 7 is fixedly connected on the circuit board 5, an anti-skid foot pad 10 is arranged at the bottom of the bottom shell 11, a battery 9 is arranged on the bottom of the bottom shell, a battery fixing piece 14 is arranged on the battery 9, an air pump 17 is provided with an air valve 16 at the output end, the air valve 16 is electrically connected with a circuit board 5, a cuff plug 12 and a cuff socket 13 are connected with an air valve 16 at the output end, a cuff plug 12 is embedded into a cuff plug 12 and connected with a socket 13 of a cuff plug of a main machine front shell 18 and a socket of a plug of a battery plug of a cuff for being connected with a socket 13, a socket of a host front shell, a host front shell 18 of a USB key assembly 5, a keyboard is electrically connected with a circuit board, a keyboard plug for electrically connected with a keyboard plug, a keyboard plug for connecting with a keyboard plug.
Further, the blood pressure measuring instrument further comprises a loudspeaker 6 embedded in the upper shell 19 of the host, the input end of the loudspeaker is electrically connected with the circuit board 5, the main control unit further comprises a voice module 204, the voice module 204 comprises a voice chip which is respectively communicated with the microprocessor 201 and the loudspeaker 6, as shown in fig. 3 and 5, the microprocessor 201 drives the loudspeaker to broadcast through the voice chip, the microprocessor 201 respectively sends C L K, DATA and BUSY signals to the interface 1, the interface 2 and the interface 3 of the voice chip through the interfaces 19, 21 and 22 of the microprocessor, and then outputs voice signals to the loudspeaker from the interface 7 and the interface 5 of the microprocessor.
Further, the model of the voice chip is WTN 6040. Through inventor's research, this model pronunciation chip need not set up external oscillator, can the low-power consumption standby, and the performance is powerful, and then has practiced thrift the cost.
Further, the main control unit further includes a communication module 203, and the communication module 203 includes a bluetooth module, which is communicated with the microprocessor 201. The microprocessor 201 transmits the measurement data to a bluetooth chip of WG222 type, and the bluetooth chip can transmit the data to the mobile phone application software according to the data request of the mobile phone terminal, as shown in fig. 3 and 6, the microprocessor 201 transmits the data to the bluetooth chip from its 30 interface and 31 interface, and the bluetooth chip transmits the data to the mobile phone terminal from its 20 interface, 21 interface, and 22 interface. And further, the function of inquiring blood pressure measurement data in the mobile phone of the user is provided, and the practicability is enhanced.
Further, the microprocessor 201 is of the model STM32f070 CB. The inventor researches and researches, the microprocessor 201 with the model number has powerful functions and low cost, is provided with the AD module, can convert analog signals into digital signals, is very convenient, and further improves the working efficiency of the device.
Further, the electric board 5 is further provided with a TM1622 type driver chip 205, which is respectively communicated with the microprocessor 201 and the L CD display screen 3, the microprocessor 201 drives the L CD display screen through the TM1622 driver chip 205 to display the measurement DATA and the device status information, as shown in fig. 3 and 7, the microprocessor 201 respectively transmits CS, RD, WR and DATA signals from its 38 interface, 39 interface, 40 interface, and 41 interface to the driver chip 205 through the 1 interface, the 2 interface, the 3 interface, and the 4 interface, and the driver chip 205 transmits signals to the L CD display screen through the 13-44 interfaces thereof.
Claims (9)
1. A blood pressure measuring device, comprising a main control unit (20), a pressure sensor circuit (301), an air pump (17) and a cuff (30), wherein the pressure sensor circuit (301) comprises an operational amplifier circuit, the main control unit (20) comprises a microprocessor (201) and a PID control circuit (202), wherein: the cuff (30) is communicated with the air pump (17) through an air pipe and is also communicated with the pressure sensor circuit (301) through a cable; the pressure sensor circuit (301) is communicated with the main control unit (20) and outputs a pressure value and a pulse wave signal to the microprocessor (201) through the operational amplification circuit; the main control unit (20) is communicated with the air pump.
2. The blood pressure measuring device according to claim 1, comprising a blood pressure measuring host, wherein the blood pressure measuring host comprises a bottom shell (11), a host front shell (18) and a host upper shell (19), the host upper shell (19) and the bottom shell (11) are respectively fixed on the top and the bottom of the host front shell (18), a L CD display screen (3) is embedded in the host upper shell (19), the top of the L CD display screen (3) is sealed with a L CD lens (1), the top edge of the host upper shell is embedded with a key assembly (2), the bottom of the host upper shell is fixedly connected with a L ED backlight (4), the bottom of the L ED backlight (4) is fixedly connected with a circuit board (5), a key circuit board (7) is fixedly connected to the circuit board (5), an anti-slip foot pad (10) is arranged at the bottom of the bottom shell (11), a battery (9) is further provided with a battery (14), the blood pressure measuring device further comprises an air pump (17), the output end of the air pump (17) is provided with a key (16), the air valve (16) is electrically connected with the circuit board (5), a cuff fixture (30) and a cuff socket (30), the air valve (13) is electrically connected with a key socket (13), the air valve (30) and a main control circuit board (13), the air valve (13) is arranged in the cuff fixture (13), the air valve (30), the air valve (13), the air valve (7) and the air valve (13), the air valve (13) are electrically connected with the main control circuit board (13), the air valve.
3. A blood pressure measuring device according to claim 1 or 2, further comprising a speaker (6) embedded in the upper case (19) of the main body, the input end of which is electrically connected with the circuit board (5); the main control unit (20) further comprises a voice module (204), and the voice module (204) comprises a voice chip which is respectively communicated with the microprocessor (201) and the loudspeaker (6).
4. A blood pressure measuring device according to claim 3, wherein the voice chip is of the type WTN 6040.
5. A blood pressure measuring device according to claim 1 or 2, wherein the main control unit (20) further comprises a communication module (203), the communication module (203) comprising a bluetooth module, which is in communication with the microprocessor (201).
6. A blood pressure measuring device according to claim 1 or 2, characterized in that the microprocessor (201) is of the type STM32f070 CB.
7. A blood pressure measuring device according to claim 3, characterized in that the microprocessor (201) is of the type STM32f070 CB.
8. A blood pressure measuring device according to claim 2, characterized in that the circuit board (5) is also provided with a driving chip (205) of the TM1622 type, which communicates with the microprocessor (201) and the L CD display screen (3), respectively.
9. A blood pressure measuring device according to claim 3, characterized in that the circuit board (5) is also provided with a driving chip (205) of the TM1622 type, which communicates with the microprocessor (201) and the L CD display screen (3), respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920944427.5U CN210990254U (en) | 2019-06-21 | 2019-06-21 | Blood pressure measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920944427.5U CN210990254U (en) | 2019-06-21 | 2019-06-21 | Blood pressure measuring device |
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| CN210990254U true CN210990254U (en) | 2020-07-14 |
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| CN201920944427.5U Active CN210990254U (en) | 2019-06-21 | 2019-06-21 | Blood pressure measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113080911A (en) * | 2021-04-01 | 2021-07-09 | 可孚医疗科技股份有限公司 | Intelligent pressure increasing and reducing control method of electronic sphygmomanometer |
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2019
- 2019-06-21 CN CN201920944427.5U patent/CN210990254U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113080911A (en) * | 2021-04-01 | 2021-07-09 | 可孚医疗科技股份有限公司 | Intelligent pressure increasing and reducing control method of electronic sphygmomanometer |
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