CN113331807B - Portable blood pressure detector - Google Patents
Portable blood pressure detector Download PDFInfo
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- CN113331807B CN113331807B CN202110613858.5A CN202110613858A CN113331807B CN 113331807 B CN113331807 B CN 113331807B CN 202110613858 A CN202110613858 A CN 202110613858A CN 113331807 B CN113331807 B CN 113331807B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
- A61B5/022—Measuring pressure in heart or blood vessels by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers
- A61B5/0225—Measuring pressure in heart or blood vessels by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers the pressure being controlled by electric signals, e.g. derived from Korotkoff sounds
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
- A61B5/02141—Details of apparatus construction, e.g. pump units or housings therefor, cuff pressurising systems, arrangements of fluid conduits or circuits
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Cardiology (AREA)
- Vascular Medicine (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Physiology (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Veterinary Medicine (AREA)
- Physics & Mathematics (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
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- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Ophthalmology & Optometry (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Abstract
The invention relates to the technical field of electronic equipment, and provides a portable blood pressure detector which comprises a host and a cuff, wherein the host is communicated with the cuff through a hose I, an inflatable belt II, an inflatable belt III, an inflatable belt IV and an inflatable belt V which are mutually communicated are arranged on the inner surface of the cuff, the inflatable belt I and the inflatable belt III are parallel to the width direction of the cuff, the inflatable belt II and the inflatable belt IV are parallel to the length direction of the cuff, one end of the inflatable belt V is communicated with the middle part of the inflatable belt II, the other end of the inflatable belt V is communicated with the middle part of the inflatable belt IV, the middle part of the inflatable belt II is communicated with the host through a hose II, and the length of the inflatable belt II is 1/2-2/3 of the length of the cuff. Through the technical scheme, the problems that the blood pressure detector in the prior art is not standard in use and the test result is inaccurate are solved.
Description
Technical Field
The invention relates to the technical field of electronic equipment, in particular to a portable blood pressure detector.
Background
The electronic sphygmomanometer is medical equipment for measuring blood pressure by utilizing the modern electronic technology and the blood pressure indirect measurement principle, and generally consists of an occlusion cuff, a sensor, an inflator pump and a measurement circuit. Nowadays, the electronic sphygmomanometer has realized full-automatic intelligent measurement, and measurement data can be automatically transmitted to a health management platform through a network and a generated health data report is fed back to a user. The measurement result is more accurate than the traditional electronic sphygmomanometer due to the adoption of a more advanced technology. When the electronic sphygmomanometer is used, standard operation is needed, for example, the binding force of an armband is required to be moderate, the standard of the binding force of each person is different, and the test result can be influenced if the binding force is not proper.
Disclosure of Invention
The invention provides a portable blood pressure detector, which solves the problems of inaccurate test results caused by irregular use of the blood pressure detector in the prior art.
The technical scheme of the invention is as follows: comprises a main machine and a sleeve belt, wherein the main machine is communicated with the sleeve belt through a hose I, an inflatable belt II, an inflatable belt III, an inflatable belt IV and an inflatable belt V which are mutually communicated are arranged on the inner surface of the sleeve belt, the inflatable belt I and the inflatable belt III are parallel to the width direction of the sleeve belt, the inflatable belt II and the inflatable belt IV are parallel to the length direction of the sleeve belt, one end of the inflatable belt V is communicated with the middle part of the inflatable belt II, the other end of the inflatable belt V is communicated with the middle part of the inflatable belt IV, the middle part of the inflatable belt II is communicated with the main machine through a hose II,
the length of the second inflatable belt is 1/2-2/3 of the length of the cuff.
Further, one end of the sleeve belt is provided with a clamping ring, the other end of the sleeve belt is provided with a blocking part, and the height of the blocking part is larger than that of the clamping ring.
Further, the blocking part is made of elastic materials.
Further, the inside air pump control circuit who is connected with main control circuit that is provided with of host computer, air pump control circuit is including triode Q2, opto-coupler U1 and darlington pipe Q1 that connects gradually, triode Q2's base with main control circuit's PWM output is connected, triode Q2's projecting pole is connected with power VCC, triode Q2's collecting electrode is connected with opto-coupler U1's input, opto-coupler U1's output is connected with darlington pipe Q1's base, darlington pipe Q1's projecting pole passes through resistance R1 and connects power VDD, darlington pipe Q1's collecting electrode ground, darlington pipe Q1's projecting pole still is connected with air pump M's positive power supply end, air pump M's negative power supply ground.
Further, the negative power supply end of the air pump M is grounded through a resistor R4, the remote end of the resistor R4 is connected with the non-inverting input end of the operational amplifier U4B, the inverting input end of the operational amplifier U4B is connected with a reference voltage VREF, and the output end of the operational amplifier U4B is connected with the IO port of the main control circuit.
Further, the reference source circuit comprises a resistor R6 and a potentiometer RP1 which are connected in series, one end of the resistor R6 is connected with a power supply VDD, one end of the potentiometer RP1 is grounded, and a sliding end of the potentiometer RP1 is used as a reference voltage VREF and is connected into an inverting input end of the operational amplifier U4B.
Further, still be provided with power switching circuit in the host computer, power switching circuit includes triode Q7, diode D1 and diode D2, triode Q7's projecting pole is connected with battery B1's positive pole, triode Q7's base loops through diode D1, resistance R9 and connects power 3.3V, diode D2's negative pole is connected to triode Q7's collecting electrode, diode D2's positive pole is connected with power 3.3V, diode D2's negative pole is as power switching circuit's output, for the power supply of host computer internal circuit component.
The working principle and the beneficial effects of the invention are as follows:
according to the invention, the inflatable belt (comprising the inflatable belt I, the inflatable belt II, the inflatable belt III, the inflatable belt IV and the inflatable belt V) is arranged on the inner wall of the cuff, when a tester sleeves the cuff on the upper arm, clicks the pre-inflatable button on the host machine, the host machine firstly inflates the inflatable belt through the hose, and when the inflatable belt is full, a user adjusts the tightness of the cuff according to the compression condition of the upper arm, so that the upper arm does not feel that compression is proper. After the tightness of the sleeve belt is adjusted, the main machine discharges the gas in the inflatable belt through the hose II. After the air in the inflatable belt is exhausted, a proper distance is kept between the cuff and the upper arm. At this time, the tester clicks a start button on the host, and the host inflates the cuff through the hose to start the blood pressure test.
In general, the length of the cuff is 2/3~3/2 of the arm circumference of the upper arm, and in order to ensure the accuracy of the measurement result, the length of the second inflatable belt should be smaller than the arm circumference of the upper arm, and the length of the second inflatable belt is preferably 1/2-2/3 of the length of the cuff.
The inflatable belt provides proper reference for a tester to adjust the tightness of the cuff, is convenient for the tester to adjust the cuff to a proper value, and is beneficial to improving the accuracy of a measurement result.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is a schematic top view of a half-cuff of the present invention;
FIG. 2 is a schematic view of a three-dimensional structure of a half-cuff according to the present invention;
FIG. 3 is a schematic diagram of an air pump control circuit according to the present invention;
FIG. 4 is a schematic diagram of a power switching circuit according to the present invention;
FIG. 5 is a schematic diagram of an automatic power-off circuit according to the present invention;
in the figure: the device comprises a 1 sleeve belt, a 101 clamping ring, a 102 blocking part, a 2 air-filled belt, a 21 air-filled belt I, a 22 air-filled belt II, a 23 air-filled belt III, a 24 air-filled belt IV, a 25 air-filled belt V, a 26-hose II, a 3-air pump control circuit and a 4-power supply switching circuit.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1-2, the portable blood pressure monitor of this embodiment includes a main unit and a cuff, the main unit is communicated with the cuff via a hose one, the inner surface of the cuff is provided with an inflatable belt one, an inflatable belt two, an inflatable belt three, an inflatable belt four and an inflatable belt five which are communicated with each other, the inflatable belt one and the inflatable belt three are parallel to the width direction of the cuff, the inflatable belt two and the inflatable belt four are parallel to the length direction of the cuff, one end of the inflatable belt five is communicated with the middle part of the inflatable belt two, the other end of the inflatable belt five is communicated with the middle part of the inflatable belt four, the middle part of the inflatable belt two is communicated with the main unit via a hose two,
the length of the second inflatable belt is 1/2-2/3 of the length of the sleeve belt.
According to the invention, the inflatable belt (comprising the inflatable belt I, the inflatable belt II, the inflatable belt III, the inflatable belt IV and the inflatable belt V) is arranged on the inner wall of the cuff, when a tester sleeves the cuff on the upper arm, clicks the pre-inflatable button on the host machine, the host machine firstly inflates the inflatable belt through the hose, and when the inflatable belt is full, a user adjusts the tightness of the cuff according to the compression condition of the upper arm, so that the upper arm does not feel that compression is proper. After the tightness of the sleeve belt is adjusted, the main machine discharges the gas in the inflatable belt through the hose II. After the air in the inflatable belt is exhausted, a proper distance is kept between the cuff and the upper arm. At this time, the tester clicks a start button on the host, and the host inflates the cuff through the hose to start the blood pressure test.
In general, the length of the cuff is 2/3~3/2 of the arm circumference of the upper arm, and in order to ensure the accuracy of the measurement result, the length of the second inflatable belt should be smaller than the arm circumference of the upper arm, and the length of the second inflatable belt is preferably 1/2-2/3 of the length of the cuff.
The inflatable belt provides proper reference for a tester to adjust the tightness of the cuff, is convenient for the tester to adjust the cuff to a proper value, and is beneficial to improving the accuracy of a measurement result.
The first inflatable belt, the fifth inflatable belt and the third inflatable belt are distributed along the length direction of the cuff and are separated by a certain distance, and when the inflatable cuff is used, the first inflatable belt, the fifth inflatable belt and the third inflatable belt are distributed along the circumferential direction of the upper arm to play a supporting role, the equidistant sleeving of the cuffs on the outer side of the upper arm is guaranteed, and therefore accurate adjustment of the tightness of the cuffs is guaranteed.
The air source for inflating the inflatable belt comes from an air pump for inflating the cuff in the host, and the arrangement mode of the hose II and the one-way valve required by inflating the inflatable belt is the same as that of the hose I and the one-way valve required by inflating the cuff; the arrangement of the exhaust valve required for the exhaust of the inflatable belt is the same as that required for the exhaust of the cuff, and will not be described here again.
Further, one end of the sleeve belt is provided with a clamping ring, the other end of the sleeve belt is provided with a blocking part, and the height of the blocking part is larger than that of the clamping ring.
In a normal state, one end of the sleeve belt far away from the clamping ring penetrates through the clamping ring, and due to the blocking effect of the blocking part, the two ends of the sleeve belt are clamped together and kept in a ring shape; when a tester uses the device, the annular sleeve belt can be sleeved on the upper arm by one hand, so that the operation of the tester is facilitated.
Further, the blocking part is made of elastic materials.
The baffle part is made of elastic materials, when two ends of the sleeve belt are required to be separated, the volume of the baffle part is changed by extruding the baffle part, and the baffle part can be pulled out from the clamping ring, so that the separation of the two ends of the sleeve belt is realized.
Further, an air pump control circuit connected with the main control circuit is arranged in the host, as shown in fig. 3, the air pump control circuit comprises a triode Q2, an optocoupler U1 and a Darlington tube Q1 which are sequentially connected, a base electrode of the triode Q2 is connected with a PWM output end of the Q6 main control circuit, an emitter electrode of the triode Q2 is connected with a power VCC, a collector electrode of the triode Q2 is connected with an input end of the optocoupler U1, an output end of the Q6 optocoupler U1 is connected with a base electrode of the Darlington tube Q1, an emitter electrode of the Q6 Darlington tube Q1 is connected with a power VDD through a resistor R1, a collector electrode of the Q6 Darlington tube Q1 is grounded, an emitter electrode of the Q6 Darlington tube Q1 is also connected with a positive power supply end of the air pump M, and a negative power supply end of the air pump M is grounded.
When the cuff or the inflatable belt is required to be inflated, the main control circuit outputs a control signal, the triode Q2 is conducted, the optocoupler U1 is conducted, the Darlington tube Q1 is conducted, the air pump M is powered on, and inflation of the cuff or the inflatable belt is started; the optical coupler U1 plays a role in electrical isolation, and prevents external interference signals from entering the main control circuit, so that the reliable operation of the main control circuit is ensured; after the control signal of the main control circuit is amplified by the Darlington pipe Q1, the air pump is driven, and the circuit is simple in structure and low in cost.
Further, as shown in fig. 3, the negative power supply end of the air pump M is grounded through a resistor R4, the remote end of the resistor R4 is connected with the non-inverting input end of the op-amp U4B, the inverting input end of the Q6 op-amp U4B is connected with a reference voltage VREF, and the output end of the Q6 op-amp U4B is connected with the IO port of the Q6 master control circuit.
The resistor R4 is connected in series with the air pump M, and the current flowing through the air pump M generates a voltage UR1 on the resistor R4, and the voltage UR1 is input to the non-inverting input terminal of the op amp U4B. When the air pump M is in a working state, the voltage UR1 is larger than the reference voltage VREF, and the operational amplifier U4B outputs a high level; conversely, when the air pump M does not work, the voltage UR1 is smaller than the reference voltage VREF, and the operational amplifier U4B outputs a low level; the output end of the operational amplifier U4B is connected to a main control circuit, and the main control circuit calculates the actual working time of the blood pressure detector of the embodiment by calculating the high level time.
When the service life of the blood pressure detector of the embodiment is determined, the factory time and the actual working time can be considered, and the service life of the blood pressure detector with relatively short actual working time can be properly prolonged; on the contrary, the blood pressure detector with longer actual working time can properly reduce the service life; compared with the method that the service life is determined simply by the delivery time, the method has the advantages that the detection precision is ensured, and meanwhile, the waste of resources is avoided.
Further, as shown in fig. 3, the reference source circuit further includes a resistor R6 and a potentiometer RP1 connected in series, one end of the resistor R6 is connected to the power supply VDD, one end of the potentiometer RP1 is grounded, and the sliding end of the potentiometer RP1 is used as a reference voltage VREF and connected to the inverting input end of the Q6 op-amp U4B.
The resistor R6 and the potentiometer RP1 are connected in series between the power supply VDD and the ground to form a resistor voltage dividing circuit, the divided voltage of the potentiometer RP1 is used as the reference voltage VREF to be output, the reference voltage VREF can be regulated by regulating the resistance value of the potentiometer RP1, and the circuit has simple structure and low cost.
Further, a power supply switching circuit is further arranged in the host, as shown in fig. 4, the power supply switching circuit comprises a triode Q7, a diode D1 and a diode D2, an emitter of the triode Q7 is connected with a positive electrode of the battery B1, a base electrode of the triode Q7 is connected with a power supply 3.3V through the diode D1 and a resistor R9 in sequence, a collector of the triode Q7 is connected with a cathode of the diode D2, an anode of the diode D2 is connected with the power supply 3.3V, and a cathode of the diode D2 is used as an output of the power supply switching circuit to supply power to circuit elements in the host.
The embodiment is a portable product, and is convenient to use at any time by adopting battery power supply; meanwhile, the power adapter is further arranged, and when an alternating current power supply exists, a user can supply power for the embodiment through the external alternating current power supply of the power adapter. The output voltage of the battery B1 is 3V, the output voltage of the power adapter is 3.3V, the emitter of the triode Q7 is connected with the battery B1, the base of the triode Q7 is connected with the power supply 3.3V, when an external power supply exists, the emitter junction of the triode Q7 is reversely biased, the triode Q7 is turned off, the diode D2 is turned on, and the power supply 3.3V supplies power for subsequent electric equipment; when the external power supply is disconnected, the emission junction of the triode Q7 is forward biased, the triode Q7 is conducted, the battery B1 supplies power for subsequent electric equipment, the diode D2 is cut off, and the current of the battery B1 is prevented from flowing backwards into the power adapter. When the battery B1 supplies power for the subsequent electric equipment, the diode D1 and the resistor R10 provide bias current for the triode Q7, when the electric quantity of the battery B1 is lower than a set value, the bias current is small, the triode Q7 is disconnected, the battery B1 stops supplying power for the subsequent electric equipment, and overdischarge of the battery B1 is avoided.
Further, an automatic power-off circuit is further arranged in the host, as shown in fig. 5, the automatic power-off circuit comprises a triode Q4 and a triode Q6, the collector of the triode Q4 is connected with the output PWR_SEL of the power supply switching circuit, the base of the triode Q4 is connected with the collector of the triode Q6 sequentially through a resistor R5 and a resistor R7, the base of the triode Q6 is connected with a Q6 main control circuit, the emitting electrode of the triode Q6 is grounded, the serial point of the resistor R5 and the resistor R7 is connected with one end of a button KEY1, the other end of the button KEY1 is grounded through a capacitor C1, the remote end of the capacitor C1 is connected with the collector of the triode Q4 through a resistor R8, and the collector of the triode Q4 is used as the output end of the automatic power-off circuit to supply power for circuit elements in the host.
In the initial state, the triode Q4 and the triode Q6 are both turned off, and the main control circuit is disconnected with the battery B1 and the power adapter. When a tester presses the button KEY1, the terminal voltage of the capacitor C1 cannot be suddenly changed, the output pwr_sel of the power switching circuit charges the capacitor C1 through the emitter junction of the transistor Q4, the resistor R5 and the button KEY1, the transistor Q4 rapidly enters a saturated state due to a larger bias current, and the output pwr_sel of the power switching circuit supplies power to the main control circuit through the transistor Q4. The main control circuit is electrified to start working, the main control circuit outputs a control signal SW to the triode Q6, the triode Q6 is conducted, at the moment, even if the button KEY1 is loosened, the triode Q6 still can provide a bias current for the triode Q4, the triode Q4 is continuously saturated and conducted, and the circuit enters a stable working state.
If the main control circuit does not receive the instruction input of the tester within the set time, the main control circuit judges that the tester is used, the main control circuit outputs a control signal SW to the base electrode of the triode Q6, the triode Q6 is turned off, the bias current cannot be continuously provided for the triode Q4, the triode Q4 is turned off, the output PWR_SEL of the power supply switching circuit stops supplying power to the main control circuit, and correspondingly, other electric equipment is powered off, so that the equipment is prevented from being in an electrified standby state for a long time.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (5)
1. The portable blood pressure detector comprises a host and a cuff, wherein the host is communicated with the cuff through a hose I, the blood pressure detector is characterized in that the inner surface of the cuff is provided with an inflatable belt I, an inflatable belt II, an inflatable belt III, an inflatable belt IV and an inflatable belt V which are communicated with each other, the inflatable belt I and the inflatable belt III are parallel to the width direction of the cuff, the inflatable belt II and the inflatable belt IV are parallel to the length direction of the cuff, one end of the inflatable belt V is communicated with the middle part of the inflatable belt II, the other end of the inflatable belt V is communicated with the middle part of the inflatable belt IV, the middle part of the inflatable belt II is communicated with the host through a hose II,
the length of the inflatable belt II is 1/2-2/3 of the length of the cuff, and before starting a blood pressure test, the inflatable belt is inflated through a hose to determine the distance between the cuff and the upper arm; the method specifically comprises the following steps: when a tester sleeves the cuff on the upper arm, clicking a pre-inflation key on the host machine, firstly inflating the inflatable belt in the host machine through a hose, and when the inflatable belt is full, a user adjusts the tightness of the cuff according to the compression condition of the upper arm, so that the upper arm does not feel that the pressure is proper; after the tightness of the sleeve belt is adjusted, the main machine discharges the gas in the inflatable belt through the hose II; after the air in the inflatable belt is exhausted, a proper distance is kept between the cuff and the upper arm; at this time, the tester clicks a start button on the host, and the host inflates the cuff through the hose to start the blood pressure test;
the main machine is internally provided with an air pump control circuit connected with a main control circuit, the air pump control circuit comprises a triode Q2, an optocoupler U1 and a Darlington tube Q1 which are sequentially connected, the base electrode of the triode Q2 is connected with the PWM output end of the main control circuit, the emitter electrode of the triode Q2 is connected with a power VCC, the collector electrode of the triode Q2 is connected with the input end of the optocoupler U1, the output end of the optocoupler U1 is connected with the base electrode of the Darlington tube Q1, the emitter electrode of the Darlington tube Q1 is connected with a power VDD through a resistor R1, the collector electrode of the Darlington tube Q1 is grounded, the emitter electrode of the Darlington tube Q1 is also connected with the positive power supply end of the air pump M, the negative power supply end of the air pump M is grounded,
the negative power supply end of the air pump M is grounded through a resistor R4, the remote end of the resistor R4 is connected with the non-inverting input end of the operational amplifier U4B, the inverting input end of the operational amplifier U4B is connected with a reference voltage VREF, the output end of the operational amplifier U4B is connected with the IO port of the main control circuit,
the resistor R4 is connected with the air pump M in series, the current flowing through the air pump M generates a voltage UR1 on the resistor R4, and the voltage UR1 is input into the non-inverting input end of the operational amplifier U4B; when the air pump M is in a working state, the voltage UR1 is larger than the reference voltage VREF, and the operational amplifier U4B outputs a high level; conversely, when the air pump M does not work, the voltage UR1 is smaller than the reference voltage VREF, and the operational amplifier U4B outputs a low level; the output end of the operational amplifier U4B is connected to a main control circuit, and the main control circuit calculates the actual working time of the blood pressure detector by calculating the high level time.
2. The portable blood pressure monitor according to claim 1, wherein one end of the cuff is provided with a clip ring, the other end of the cuff is provided with a stopper, and the height of the stopper is greater than the height of the clip ring.
3. The portable blood pressure monitor of claim 2, wherein the barrier is made of an elastic material.
4. The portable blood pressure monitor according to claim 1, further comprising a reference source circuit, wherein the reference source circuit comprises a resistor R6 and a potentiometer RP1 connected in series, one end of the resistor R6 is connected to a power supply VDD, one end of the potentiometer RP1 is grounded, and a sliding end of the potentiometer RP1 is used as a reference voltage VREF and is connected to an inverting input end of the op amp U4B.
5. The portable blood pressure detector according to claim 1, wherein a power supply switching circuit is further provided in the host, the power supply switching circuit comprises a triode Q7, a diode D1 and a diode D2, an emitter of the triode Q7 is connected with a positive electrode of the battery B1, a base of the triode Q7 is connected with a power supply 3.3V sequentially through the diode D1 and a resistor R9, a collector of the triode Q7 is connected with a cathode of the diode D2, an anode of the diode D2 is connected with the power supply 3.3V, and a cathode of the diode D2 is used as an output of the power supply switching circuit to supply power to circuit elements in the host.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110613858.5A CN113331807B (en) | 2021-06-02 | 2021-06-02 | Portable blood pressure detector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110613858.5A CN113331807B (en) | 2021-06-02 | 2021-06-02 | Portable blood pressure detector |
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| CN113331807A CN113331807A (en) | 2021-09-03 |
| CN113331807B true CN113331807B (en) | 2023-07-28 |
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| CN210644016U (en) * | 2019-05-24 | 2020-06-02 | 可孚医疗科技股份有限公司 | Automatic detection device of electronic sphygmomanometer |
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| DE102011111030A1 (en) * | 2010-12-24 | 2012-06-28 | Paul Hartmann Ag | Blood pressure measuring cuff |
| CN203290894U (en) * | 2013-06-26 | 2013-11-20 | 四川大学华西第二医院 | Multi-mode sphygmomanometer cuff |
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