CN211609769U

CN211609769U - Portable arm digital electronic sphygmomanometer

Info

Publication number: CN211609769U
Application number: CN202020168326.6U
Authority: CN
Inventors: 张瀛
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-02-14
Filing date: 2020-02-14
Publication date: 2020-10-02
Anticipated expiration: 2030-02-14

Abstract

A portable arm digital electronic sphygmomanometer, a host comprises a flat square host box body made of hard sterile plastic, and the host box body comprises an upper surface, a lower surface and a side surface; a square LCD display screen is arranged on the upper surface, and explanatory characters are marked on the side surface of the LCD display screen and comprise a high-voltage numerical value, a low-voltage numerical value and a pulse numerical value; the bottom side of the LCD display screen is provided with a key group; the lower surface is provided with a battery jar and a motor jar, a rechargeable battery is arranged in the battery jar, and the battery jar is matched with the jar cover; an electric air pump is arranged in the motor groove, and a rechargeable battery provides power for the electric air pump; the side surface is provided with an air hole connected with the vent pipe; the electric air pump is connected with the vent pipe through the air hole. The portable arm digital electronic sphygmomanometer has high integration level of an internal circuit integrated part and relatively small volume, and is convenient to carry during traveling.

Description

Portable arm digital electronic sphygmomanometer

Technical Field

The utility model relates to the technical field of medical equipment, a sphygmomanometer using a hand arm part as a determined part, in particular to a portable arm digital electronic sphygmomanometer.

Background

With the rapid development of economic level, people pay more and more attention to health. Electronic blood pressure meters are also increasingly commonly used by people as a tool for measuring blood pressure. Electronic blood pressure meters are widely used in two categories: wrist sphygmomanometers and arm sphygmomanometers.

Most of the household electronic blood pressure meters sold in the market at present adopt the oscillometric principle to measure the blood pressure. The method is simple, relatively reliable and convenient to realize by adopting an electronic circuit method. The oscillometric process of measuring blood pressure is consistent with the Korotkoff sound method. The cuff is pressurized to block the flow of blood in the brachial artery and then slowly depressurized, during which time the arm will transmit sound and small pressure pulses. The Korotkoff sound method is to manually recognize sounds coming out of the arm and to interpret the systolic and diastolic pressures. The oscillometric method is to identify the small pulse from arm to cuff and to differentiate them to obtain the blood pressure value.

The electronic sphygmomanometer is composed of an air sleeve, an electric air pump, a pressure sensor, an electromagnetic air valve, a microcontroller, a liquid crystal display air and the like. Before measurement, the air pump raises the cuff pressure to a certain value, which may be set automatically or manually by sphygmomanometer and then gradually deflates at 4-5 mmHg per second, the detected peak amplitude value of pulse wave and the static pressure of cuff are fed to CPU for processing, and the heart rate is calculated based on the pulse frequency. The whole measuring process is controlled by the MCU and various calculations are completed.

However, the internal circuit integrated part of the arm digital electronic sphygmomanometer on the market is large, and the size is relatively large, so that the arm digital electronic sphygmomanometer is not convenient to carry during traveling.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems existing in the prior art, the utility model provides a portable arm digital electronic sphygmomanometer, the integrated level of the integrated part of the internal circuit is high, the volume is relatively small, and the portable arm digital electronic sphygmomanometer is convenient to carry in the outgoing trip.

The utility model provides a technical scheme that its technical problem adopted is:

a portable arm digital electronic sphygmomanometer comprises an arm belt 2 used for surrounding the upper arm of a blood pressure person to be measured, wherein the arm belt 2 is connected with a host 1 through a vent pipe 3; the host 1 comprises a flat square host box body 101 made of hard sterile plastics, and the host box body 101 comprises an upper surface 102, a lower surface 103 and a side surface 104; a square LCD display screen 105 is arranged on the upper surface 102, explanatory characters 106 are marked on the side surface of the LCD display screen 105, and the explanatory characters 106 comprise a high-voltage numerical value, a low-voltage numerical value and a pulse numerical value; the bottom side of the LCD display screen 105 is provided with a key group 107; the lower surface 103 is provided with a battery groove 108 and a motor groove 111, a rechargeable battery is arranged in the battery groove 108, and the battery groove 108 is matched with a groove cover 109; an electric air pump 112 is arranged in the motor groove 111, and a rechargeable battery provides power for the electric air pump 112; the side surface 104 is provided with an air hole 110 connected with the air pipe 3; the electric air pump 112 is connected to the air pipe 3 through the air hole 110.

The utility model discloses still have following additional technical characterstic:

as the utility model discloses technical scheme further specifically optimizes: a circuit installation cavity is formed among the upper surface 102, the lower surface 103 and the side surface 104, and a hardware circuit is installed in the circuit installation cavity; the hardware circuit comprises a microprocessor which is an SH79F164 singlechip; the SH79F164 single chip microcomputer is internally provided with a signal amplifier circuit, a band-pass filter circuit, a fixed gain amplifier circuit and an A/D analog-to-digital converter circuit.

As the utility model discloses technical scheme further specifically optimizes: the SH79F164 singlechip is electrically connected with the electric air pump 112 through an inflation control circuit and an deflation control circuit respectively, and the electric air pump 112 is connected with the air pipe 3; a pressure sensor is arranged at the joint of the vent pipe 3 and the air hole 110, the pressure sensor converts an air pressure signal in the arm band 2 into a voltage signal, the voltage signal is converted into a pulse signal through a signal amplifier, a band-pass filter and a fixed gain amplifier, and the voltage signal is converted into a blood pressure signal through an A/D (analog/digital) converter and the signal amplifier; the pulse signals and the blood pressure signals are transmitted to the SH79F164 singlechip for processing and then are transmitted to the LCD display screen 105 for displaying through the display interface circuit.

As the utility model discloses technical scheme further specifically optimizes: the model of the pressure sensor is a BP01 type pressure sensor; the BP01 type pressure sensor is specially designed for monitoring blood pressure, and is mainly used for a portable electronic sphygmomanometer. The high-linearity high-noise high-precision thick-film ceramic chip is packaged by adopting a precise thick-film ceramic chip and nylon plastics, and has the characteristics of high linearity, low noise and small external stress; the internal calibration and temperature compensation modes are adopted, so that the precision, stability and repeatability of measurement are improved, in the full-range, the precision is 1% and the zero offset is not more than 300 mu V.

As the utility model discloses technical scheme further specifically optimizes: the display interface circuit comprises a P1 wiring board, wherein a No. 1 pin of the P1 wiring board is grounded GND, a No. 2 pin and a No. 3 pin are both connected to VCC-5V power supply voltage, a No. 3 pin is connected to an RS circuit, a No. 4 pin is connected to an RW circuit, a No. 5 pin is connected to an E circuit, a No. 6 pin and a No. 14 pin are respectively connected to a D0 circuit-D7 circuit, a No. 15 pin is connected to a PSB circuit, a No. 16 pin and a No. 16 pin are both connected in a null mode, a No. 17 pin and a No. 19 pin are both connected to VCC-5V power supply voltage.

As the utility model discloses technical scheme further specifically optimizes: the SH79F164 single chip microcomputer is also electrically connected with the communication interface circuit, the USB interface circuit and the key group 107; the communication interface circuit comprises a U2 wiring board and a P2 wiring board; the No. 1 pin of the U2 wiring board is connected to an RXD end, the No. 2 pin and the No. 3 pin are both connected to an RE end, the No. 4 pin is connected to a TXD end, the No. 5 pin is grounded GND, the No. 6 pin is connected to 5V power supply voltage through a resistor R4, the No. 6 pin is connected to the No. 7 pin through a resistor R3, and the No. 6 pin is also directly connected to the No. 2 pin of a P2 wiring board; pin 7 is directly connected to pin 3 of the P2 wiring board; the No. 8 pin is connected to a 5V power supply voltage; the No. 1 pin of the P2 wiring board is grounded GND, and the No. 2 pin and the No. 3 pin are respectively connected with the No. 6 pin and the No. 7 pin of the P2 wiring board; the No. 4 pin is connected to a 12V power supply voltage; the USB interface circuit comprises a USB wiring board, wherein a pin 1 of the USB wiring board is connected to VCC-5V power supply voltage, a pin 2 is connected to a D-end, a pin 3 is connected to a D + end, a pin 4 is connected to an NC end, and a pin 5 is grounded GND; the key group 107 includes "start", "clear", "close", and "one-key transmission".

As the utility model discloses technical scheme further specifically optimizes: the SH79F164 single chip microcomputer is electrically connected with a rechargeable battery, the rechargeable battery is respectively electrically connected with the charging interface circuit, the power indicator lamp circuit and the boosting and voltage stabilizing circuit, and the boosting and voltage stabilizing circuit is connected with the power supply interface circuit; the charging interface circuit comprises a P4 wiring board, a No. 1 pin of the P4 wiring board is connected to VCC power supply voltage, and a No. 2 pin and a No. 3 pin are both grounded GND; the power indicator lamp circuit comprises an LED light-emitting diode D2, wherein one end of the LED D2 is connected to 5V power supply voltage through a resistor R2, and the other end of the LED D2 is grounded GND; the boosting voltage stabilizing circuit comprises a U4 wiring board MST9225B, a No. 1 pin of a U4 wiring board is in idle connection, a No. 2 pin is grounded GND, a No. 3 pin and a No. 4 pin are both grounded GND through a capacitor C8 and are also both connected to a No. 5 pin of a 5V power supply voltage in idle connection, a No. 6 pin is divided into 3 branches, the 1 branch is grounded GND through a resistor R9, the 2 branch is connected to an SS34 node through a resistor R8, and the 3 branch is connected to an SS34 node through a capacitor C10; the SS34 node is divided into 3 branches, the branch 1 is directly connected to 12V power supply voltage, the branch 2 is grounded to GND through a capacitor C9, and the branch 3 is grounded to GND through a capacitor C7; the No. 7 pin is divided into 2 branches, the branch 1 is connected to a 5V power supply voltage through an inductor L1, and the branch 2 is connected to an SS34 node through a diode D3; no. 8 pin is in idle connection; pin 9 is grounded GND; the power supply interface circuit comprises a P3 wiring board, a No. 1 pin of the P3 wiring board is grounded GND, a No. 2 pin-No. 3 pin is connected in an idle mode, and a No. 4 pin is connected with 12V power supply voltage.

Compared with the prior art, the utility model, its advantage lies in:

advantage (1): the integrated part of the internal circuit of the portable arm digital electronic sphygmomanometer has high integration level and relatively small volume, and is convenient to carry during traveling.

Advantage (2): the utility model discloses a SH79F164 singlechip built-in circuit can realize the automatic initialization of maring of procedure, need not the manual work and sets up peripheral circuit, convenient batch production. The SH79F164 enhanced single chip microcomputer is used as a core, and the execution speed is about 10 times faster than that of the traditional 8051 single chip microcomputer.

Advantage (3): measuring range of the portable arm digital electronic sphygmomanometer: pressure: 40 to 220 mmHg; pulse: 40 to 180 pulses per minute.

Advantage (4): measurement error of the portable arm digital electronic sphygmomanometer: static pressure basic error: 3mmHg (0.4 kpa); basic error of blood pressure measurement: plus or minus 5% of the reading value; pulse rate error: . + -. 5% of the reading.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that 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 according to these drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of the portable digital arm electronic sphygmomanometer of the present invention;

FIG. 2 is a schematic view of the back part of the portable digital arm electronic sphygmomanometer of the present invention;

FIG. 3 is a schematic diagram of the overall circuit connection structure of the present invention;

FIG. 4 is a schematic diagram of the SH79F164 single-chip microcomputer of the present invention;

fig. 5 is a schematic structural diagram of the signal amplifier circuit, the band-pass filter circuit, the fixed gain amplifier circuit and the a/D analog-to-digital converter circuit of the present invention;

fig. 6 is a schematic diagram of the display interface circuit structure of the present invention;

fig. 7 is a schematic diagram of a communication interface circuit structure of the present invention;

fig. 8 is a schematic diagram of the USB interface circuit structure of the present invention;

fig. 9 is a schematic diagram of a circuit structure of the key set 107 of the present invention;

fig. 10 is a schematic diagram of the charging interface circuit of the present invention;

FIG. 11 is a schematic diagram of the circuit structure of the power indicator of the present invention;

FIG. 12 is a schematic diagram of the boost voltage stabilizing circuit of the present invention;

fig. 13 is a schematic diagram of the power supply interface circuit structure of the present invention.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings, in order that the present disclosure may be more completely understood, and the scope of the present disclosure may be fully conveyed to those skilled in the art. While the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure is not limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description of the present invention, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Meanwhile, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the connection can be mechanical connection or electrical connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A portable arm digital electronic sphygmomanometer is shown in figures 1-2, and comprises an arm belt 2 for encircling the upper arm of a blood pressure person to be measured, wherein the arm belt 2 is connected to a host 1 through a vent pipe 3.

As shown in fig. 1-2, the main body 1 comprises a flat and square main body box 101 made of hard sterile plastic, wherein the main body box 101 comprises an upper surface 102, a lower surface 103 and a side surface 104; a square LCD display screen 105 is arranged on the upper surface 102, explanatory characters 106 are marked on the side surface of the LCD display screen 105, and the explanatory characters 106 comprise a high-voltage numerical value, a low-voltage numerical value and a pulse numerical value; the bottom side of the LCD display screen 105 is provided with a key group 107; the lower surface 103 is provided with a battery groove 108 and a motor groove 111, a rechargeable battery is arranged in the battery groove 108, and the battery groove 108 is matched with a groove cover 109; an electric air pump 112 is arranged in the motor groove 111, and a rechargeable battery provides power for the electric air pump 112; the side surface 104 is provided with an air hole 110 connected with the air pipe 3; the electric air pump 112 is connected to the air pipe 3 through the air hole 110.

A circuit installation cavity is formed among the upper surface 102, the lower surface 103 and the side surface 104, and a hardware circuit is installed in the circuit installation cavity; as shown in fig. 3, the hardware circuit includes a microprocessor, which is an SH79F164 single chip microcomputer; the SH79F164 single chip microcomputer is internally provided with a signal amplifier circuit, a band-pass filter circuit, a fixed gain amplifier circuit and an A/D analog-to-digital converter circuit.

As shown in fig. 4, the SH79F164 single chip microcomputer is electrically connected to the electric air pump 112 through the inflation control circuit and the deflation control circuit, respectively, and the electric air pump 112 is connected to the ventilation pipe 3; the joint of the air pipe 3 and the air hole 110 is provided with a pressure sensor which converts the air pressure signal in the arm band 2 into a voltage signal, the voltage signal is converted into a pulse signal through a signal amplifier, a band-pass filter and a fixed gain amplifier, and the voltage signal is converted into a blood pressure signal through an A/D (analog/digital) converter and the signal amplifier. The pulse signals and the blood pressure signals are transmitted to the SH79F164 singlechip for processing and then are transmitted to the LCD display screen 105 for displaying through the display interface circuit.

The signal output by the pressure sensor is directly connected to the SH79F164 singlechip, and amplification, filtering and acquisition processing are completed by the built-in resources of the chip. The SH79F164 single chip microcomputer is internally provided with a band-pass filter composed of OP2 and OP3, so that direct current components can be filtered, high-frequency noise generated by friction between a human body and a cuff, 50Hz power frequency noise, circuit noise, PUMP, air valve noise and the like can be filtered, and the SH79F164 single chip microcomputer can accurately extract pulse signals.

In addition, in the prior art, there are many software filtering methods commonly used at present, such as: amplitude limiting filtering, median filtering, arithmetic mean filtering, recursive mean filtering, first-order low-pass filtering, etc. According to the technical scheme, an amplitude limiting filtering method is adopted for pressure signals to filter abnormal jitter, a second-order low-pass filtering algorithm is adopted for pulse signals to filter 50Hz power frequency interference again, and a median average filtering method is adopted for heart rate signal calculation.

The utility model discloses a SH79F164 singlechip built-in circuit can realize the automatic initialization of maring of procedure, need not the manual work and sets up peripheral circuit, convenient batch production. The SH79F164 enhanced single chip microcomputer is used as a core, and the execution speed is about 10 times faster than that of the traditional 8051 single chip microcomputer.

The model of the pressure sensor is a BP01 type pressure sensor; the BP01 type pressure sensor is specially designed for monitoring blood pressure, and is mainly used for a portable electronic sphygmomanometer. The high-linearity high-noise high-precision thick-film ceramic chip is packaged by adopting a precise thick-film ceramic chip and nylon plastics, and has the characteristics of high linearity, low noise and small external stress; the internal calibration and temperature compensation modes are adopted, so that the precision, stability and repeatability of measurement are improved, in the full-range, the precision is 1% and the zero offset is not more than 300 mu V.

The display interface circuit is connected with the SH79F164 singlechip and the LCD display screen 105 and is used for displaying the pulse value and the blood pressure value on the LCD display screen 105. As shown in fig. 6, the display interface circuit includes a P1 wiring board, wherein pin 1 of the P1 wiring board is grounded to GND, pin 2 and pin 3 are both connected to VCC-5V power supply voltage, pin 3 is connected to RS line, pin 4 is connected to RW line, pin 5 is connected to E line, pin 6-14 is connected to D0 line-D7 line, pin 15 is connected to PSB line, pin 16 and pin 16 are both idle, pin 17 and pin 19 are both connected to VCC-5V power supply voltage, and pin 20 is grounded to GND.

As shown in fig. 7-9, the SH79F164 mcu is further electrically connected to the communication interface circuit, the USB interface circuit and the keypad 107.

As shown in fig. 7, the communication interface circuit comprises a U2 patch panel and a P2 patch panel; the No. 1 pin of the U2 wiring board is connected to an RXD end, the No. 2 pin and the No. 3 pin are both connected to an RE end, the No. 4 pin is connected to a TXD end, the No. 5 pin is grounded GND, the No. 6 pin is connected to 5V power supply voltage through a resistor R4, the No. 6 pin is connected to the No. 7 pin through a resistor R3, and the No. 6 pin is also directly connected to the No. 2 pin of a P2 wiring board; pin 7 is directly connected to pin 3 of the P2 wiring board; pin 8 is connected to the 5V supply voltage. The No. 1 pin of the P2 wiring board is grounded GND, and the No. 2 pin and the No. 3 pin are respectively connected with the No. 6 pin and the No. 7 pin of the P2 wiring board; pin No. 4 is connected to the 12V supply voltage.

The SH79F164 single chip microcomputer is provided with a communication interface circuit, the pulse value and the blood pressure value can be sent to a bound client through a one-key sending key through the communication interface circuit, and the client comprises a mobile phone client, a PC client or a cloud server.

As shown in fig. 8, the USB interface circuit includes a USB connection board, pin 1 of the USB connection board is connected to VCC-5V power supply voltage, pin 2 is connected to D-terminal, pin 3 is connected to D + terminal, pin 4 is connected to NC terminal, and pin 5 is grounded GND. The SH79F164 singlechip is provided with a USB interface circuit, and the internal information of the portable arm digital electronic sphygmomanometer can be read or set through a PC client.

As shown in fig. 9, the key group 107 includes "start", "clear", "close", and "one-key transmission". The working states of the portable arm digital electronic sphygmomanometer are respectively controlled through 'start', 'clear', 'close' and 'one-key sending'.

As shown in fig. 10-13, the SH79F164 single chip is electrically connected to a rechargeable battery, the rechargeable battery is electrically connected to the charging interface circuit, the power indicator circuit and the boost voltage stabilizing circuit, respectively, and the boost voltage stabilizing circuit is connected to the power supply interface circuit.

As shown in FIG. 10, the charging interface circuit comprises a P4 wiring board, pin No. 1 of the P4 wiring board is connected to VCC power supply voltage, and pin No. 2 and pin No. 3 are both grounded to GND. Be provided with the interface circuit that charges on the SH79F164 singlechip, can charge for rechargeable battery through the interface circuit that charges, the wireless formula of being convenient for is hand-carried, improves the convenience.

As shown in fig. 11, the power indicator circuit includes an LED D2, wherein one end of the LED D2 is connected to a 5V supply voltage through a resistor R2, and the other end is connected to the ground GND. The SH79F164 single chip microcomputer is provided with a power indicator circuit, and the power indicator circuit can display information of the rechargeable battery, such as a charging mode, a discharging mode, a low-voltage mode and the like.

As shown in fig. 12, the voltage boosting and stabilizing circuit includes a U4 wiring board MST9225B, pin 1 of a U4 wiring board is connected to ground GND, pin 2 is connected to ground GND through a capacitor C8, pin 3 and pin 4 are connected to pin 5 of a 5V power supply voltage, pin 6 is divided into 3 branches, branch 1 is connected to ground GND through a resistor R9, branch 2 is connected to an SS34 node through a resistor R8, and branch 3 is connected to an SS34 node through a capacitor C10; the SS34 node is divided into 3 branches, the branch 1 is directly connected to 12V power supply voltage, the branch 2 is grounded to GND through a capacitor C9, and the branch 3 is grounded to GND through a capacitor C7; the No. 7 pin is divided into 2 branches, the branch 1 is connected to a 5V power supply voltage through an inductor L1, and the branch 2 is connected to an SS34 node through a diode D3; no. 8 pin is in idle connection; pin No. 9 is grounded GND. The SH79F164 singlechip is provided with a voltage boosting and stabilizing circuit which can boost and stabilize the discharge voltage of the rechargeable battery,

output

5V and 12V voltages and provide power supply for a hardware circuit.

As shown in FIG. 13, the power supply interface circuit comprises a P3 wiring board, pin No. 1 of the P3 wiring board is grounded GND, pin No. 2-pin No. 3 are connected in a null mode, and pin No. 4 is connected with a 12V power supply voltage. The SH79F164 single chip microcomputer is provided with a power supply interface, and the power supply interface is connected with each hardware circuit to provide power for the hardware circuit.

The portable arm digital electronic sphygmomanometer also has an embodiment, namely a low-power consumption Bluetooth module SKB369/SKB501 is arranged on the SH79F164 single chip microcomputer, and Bluetooth modules in the mobile phone Bluetooth and the sphygmomanometer are paired to realize data reading, recording and data uploading of a mobile phone APP. Compared with the traditional electronic sphygmomanometer, the sphygmomanometer has the advantages of wireless transmission, no need of wiring and direct uploading to a mobile phone. On the other hand, the sphygmomanometer is used for continuously monitoring the blood pressure of an individual, continuous historical data are stored in the cloud, a permanent health file is established for a user, the health and disease conditions of the user can be analyzed, counted and reported, an optimal health and disease diagnosis scheme can be provided, the health conditions of the user can be known and tracked in time, disease monitoring is carried out, and a new management mode of health and disease intelligent medical treatment is realized.

Measuring range of the portable arm digital electronic sphygmomanometer: pressure: 40 to 220 mmHg; pulse: 40 to 180 pulses per minute.

Measurement error of the portable arm digital electronic sphygmomanometer: static pressure basic error: 3mmHg (0.4 kpa); basic error of blood pressure measurement: plus or minus 5% of the reading value; pulse rate error: . + -. 5% of the reading.

Although the embodiments have been described, once the basic inventive concept is known, other changes and modifications can be made to the embodiments by those skilled in the art, so that the above embodiments are only examples of the present invention, and not intended to limit the scope of the present invention, and all changes in equivalent structures or equivalent processes using the contents of the specification and drawings of the present invention, or directly or indirectly using other related technical fields, are also included in the scope of the present invention.

Claims

1. A portable arm digital electronic sphygmomanometer is characterized by comprising an arm belt (2) used for surrounding the upper arm of a person to be measured, wherein the arm belt (2) is connected to a host (1) through a vent pipe (3);

the main machine (1) comprises a flat and square main machine box body (101) made of hard sterile plastics, and the main machine box body (101) comprises an upper surface (102), a lower surface (103) and a side surface (104); a square LCD display screen (105) is arranged on the upper surface (102), explanatory characters (106) are marked on the side surface of the LCD display screen (105), and the explanatory characters (106) comprise a high-voltage value, a low-voltage value and a pulse value; a key group (107) is arranged on the bottom side of the LCD display screen (105); the lower surface (103) is provided with a battery groove (108) and a motor groove (111), a rechargeable battery is arranged in the battery groove (108), and the battery groove (108) is matched with a groove cover (109) for installation; an electric air pump (112) is arranged in the motor groove (111), and the rechargeable battery provides power for the electric air pump (112); the side surface (104) is provided with an air hole (110) connected with the vent pipe (3); the electric air pump (112) is connected with the air pipe (3) through the air hole (110).

2. The portable digital electronic arm sphygmomanometer of claim 1, wherein: a circuit installation cavity is formed among the upper surface (102), the lower surface (103) and the side surface (104), and a hardware circuit is installed in the circuit installation cavity; the hardware circuit comprises a microprocessor, and the microprocessor is an SH79F164 singlechip; the SH79F164 single chip microcomputer is internally provided with a signal amplifier circuit, a band-pass filter circuit, a fixed gain amplifier circuit and an A/D analog-to-digital converter circuit.

3. The portable digital electronic arm sphygmomanometer of claim 2, wherein: the SH79F164 singlechip is electrically connected with the electric air pump (112) through an inflation control circuit and an deflation control circuit respectively, and the electric air pump (112) is connected with the air pipe (3); a pressure sensor is arranged at the joint of the vent pipe (3) and the air hole (110), the pressure sensor converts an air pressure signal in the arm band (2) into a voltage signal, the voltage signal is converted into a pulse signal through a signal amplifier, a band-pass filter and a fixed gain amplifier, and the voltage signal is converted into a blood pressure signal through an A/D (analog-to-digital) converter and the signal amplifier; the pulse signals and the blood pressure signals are transmitted to the SH79F164 singlechip for processing and then are transmitted to the LCD display screen (105) through a display interface circuit for displaying.

4. The portable digital arm electronic sphygmomanometer according to claim 3, wherein: the model of the pressure sensor is a BP01 type pressure sensor.

5. The portable digital arm electronic sphygmomanometer according to claim 3, wherein: the display interface circuit comprises a P1 wiring board, wherein a pin 1 of the P1 wiring board is grounded to GND, a pin 2 and a pin 3 are both connected to VCC-5V power supply voltage, a pin 3 is connected to an RS circuit, a pin 4 is connected to a RW circuit, a pin 5 is connected to an E circuit, a pin 6-a pin 14 are respectively connected to a D0 circuit-D7 circuit, a pin 15 is connected to a PSB circuit, a pin 16 and a pin 16 are both connected in the air, a pin 17 and a pin 19 are both connected to VCC-5V power supply voltage, and a pin 20 is grounded to GND.

6. The portable digital arm electronic sphygmomanometer according to claim 5, wherein: the SH79F164 single chip microcomputer is also electrically connected with the communication interface circuit, the USB interface circuit and the key group (107);

the communication interface circuit comprises a U2 wiring board and a P2 wiring board; the No. 1 pin of the U2 wiring board is connected to an RXD end, the No. 2 pin and the No. 3 pin are both connected to an RE end, the No. 4 pin is connected to a TXD end, the No. 5 pin is grounded GND, the No. 6 pin is connected to 5V power supply voltage through a resistor R4, the No. 6 pin is connected to the No. 7 pin through a resistor R3, and the No. 6 pin is also directly connected to the No. 2 pin of a P2 wiring board; pin 7 is directly connected to pin 3 of the P2 wiring board; the No. 8 pin is connected to a 5V power supply voltage;

the No. 1 pin of the P2 wiring board is grounded GND, and the No. 2 pin and the No. 3 pin are respectively connected with the No. 6 pin and the No. 7 pin of the P2 wiring board; the No. 4 pin is connected to a 12V power supply voltage;

the USB interface circuit comprises a USB wiring board, wherein a pin 1 of the USB wiring board is connected to VCC-5V power supply voltage, a pin 2 is connected to a D-end, a pin 3 is connected to a D + end, a pin 4 is connected to an NC end, and a pin 5 is grounded GND;

the key group (107) includes "start", "clear", "close", and "one-key transmission".

7. The portable digital arm electronic sphygmomanometer according to claim 5, wherein: the SH79F164 single chip microcomputer is electrically connected with a rechargeable battery, the rechargeable battery is respectively electrically connected with the charging interface circuit, the power indicator lamp circuit and the boosting and voltage stabilizing circuit, and the boosting and voltage stabilizing circuit is connected with the power supply interface circuit;

the charging interface circuit comprises a P4 wiring board, a No. 1 pin of the P4 wiring board is connected to VCC power supply voltage, and a No. 2 pin and a No. 3 pin are both grounded GND;

the power indicator lamp circuit comprises an LED (light emitting diode) D2, wherein one end of the LED D2 is connected to 5V power supply voltage through a resistor R2, and the other end of the LED D2 is grounded GND;

the boosting voltage stabilizing circuit comprises a U4 wiring board MST9225B, a No. 1 pin of a U4 wiring board is in idle connection, a No. 2 pin is grounded GND, a No. 3 pin and a No. 4 pin are both grounded GND through a capacitor C8 and are also both connected to a No. 5 pin of a 5V power supply voltage in idle connection, a No. 6 pin is divided into 3 branches, the 1 branch is grounded GND through a resistor R9, the 2 branch is connected to an SS34 node through a resistor R8, and the 3 branch is connected to an SS34 node through a capacitor C10; the SS34 node is divided into 3 branches, the branch 1 is directly connected to 12V power supply voltage, the branch 2 is grounded to GND through a capacitor C9, and the branch 3 is grounded to GND through a capacitor C7; the No. 7 pin is divided into 2 branches, the branch 1 is connected to a 5V power supply voltage through an inductor L1, and the branch 2 is connected to an SS34 node through a diode D3; no. 8 pin is in idle connection; pin 9 is grounded GND;

the power supply interface circuit comprises a P3 wiring board, a No. 1 pin of the P3 wiring board is grounded GND, a No. 2 pin-No. 3 pin is connected in an idle mode, and a No. 4 pin is connected with 12V power supply voltage.