CN111329510A

CN111329510A - Wireless heart noise detection system and method

Info

Publication number: CN111329510A
Application number: CN202010183839.9A
Authority: CN
Inventors: 黄国英; 胡晓静
Original assignee: Childrens Hospital of Fudan University
Current assignee: Childrens Hospital of Fudan University
Priority date: 2019-04-15
Filing date: 2020-03-16
Publication date: 2020-06-26

Abstract

The invention relates to the technical field of heart detection, in particular to a wireless heart noise detection system and a wireless heart noise detection method, which comprise a pickup chest piece, a wireless charger body and a bracelet, wherein the pickup chest piece is of a disc-shaped structure, a first display screen is arranged on the surface of the pickup chest piece, a power button and an adjusting knob are arranged on the pickup chest piece and below the first display screen, a patch is arranged at the center of the bottom surface of the pickup chest piece, a photoelectric sensor is arranged in the patch, and a plurality of first suckers are arranged on the bottom surface of the pickup chest piece and close to the edge of the pickup chest piece. The invention realizes real-time interaction with the pickup chest piece through the matched bracelet in a wireless transmission mode, can display the heart rate signal and the heart noise signal of the patient on the bracelet in real time, and is convenient for observation and recording.

Description

Wireless heart noise detection system and method

Technical Field

The invention relates to the technical field of heart detection, in particular to a wireless heart noise detection system and a wireless heart noise detection method.

Background

At present, a heart murmur still depends on a stethoscope to perform manual auscultation, a lead wire of the heart mur is not easy to store, and is easy to damage when being exposed outside with an auscultation head, and the auscultation can not realize real-time monitoring.

Disclosure of Invention

The present invention is directed to a wireless heart noise detection system and method, which solves the above problems.

In order to achieve the above object, in one aspect, the present invention provides the following technical solutions: the utility model provides a wireless heart noise detecting system, includes pickup chest piece, wireless charger body, bracelet and sets up low pass amplifier, comparator, singlechip and digital display circuit on integrated circuit board in the pickup chest piece, the pickup chest piece is disc structure the surface of pickup chest piece is equipped with first display screen, on the pickup chest piece and be located first display screen below and be equipped with power button and adjust knob, the bottom surface central point of pickup chest piece puts and is equipped with the paster, be equipped with photoelectric sensor in the paster, the bottom surface of pickup chest piece just is close to the edge and is equipped with a plurality of first sucking discs.

Preferably, the bottom of the wireless charger body is provided with a base, the top of the wireless charger body is provided with an indicator light, the end part of the wireless charger body is connected with a power line, and the tail end of the power line is provided with a power plug.

Preferably, the four corners of the bottom of the base are provided with second suckers, the top end of each second sucker is provided with an inserting column, the top end of each inserting column is connected with a spring, the bottom surface of the wireless charger body corresponds to the inserting column, the inserting columns are inserted into the inserting holes and are in sliding connection with the inserting holes, a hanging buckle is arranged at the center of the bottom surface of the base, and a strip-shaped groove is formed in the tail end of the hanging buckle.

As preferred, the surface of bracelet is equipped with the second display screen, the bottom of bracelet is equipped with the rubber tape, just the both ends of rubber tape connect in the both ends of bracelet, be equipped with the knob on the lateral wall of bracelet.

Preferably, the output end of the photoelectric sensor is electrically connected with the low-pass amplifier, the low-pass amplifier is electrically connected with the comparator, the comparator is electrically connected with the I/O interface of the single chip microcomputer, and the I/O interface of the single chip microcomputer is electrically connected with the digital display circuit.

Preferably, the wireless charger further comprises a wireless transmitting system arranged in the wireless charger body and a wireless receiving system arranged in the pickup chest piece, wherein the wireless transmitting system comprises a power supply module, a square wave generating circuit, a driving circuit, a high-frequency inverter circuit and a transmitting coil, the wireless receiving system comprises a rectifying and filtering circuit, a converting circuit, a monitoring module, a rechargeable battery and a receiving coil, the power supply module and the square wave generating circuit are electrically connected with the driving circuit, the driving circuit is electrically connected with the high-frequency inverter circuit, the high-frequency inverter circuit generates high-frequency alternating current on the transmitting coil, the high-frequency alternating current generates a changing magnetic field and transmits the changing magnetic field to the receiving coil, the magnetic field received by the receiving coil is coupled to the rectifying and filtering circuit, the rectifying and filtering circuit is electrically connected with the converting circuit, and the converting circuit is electrically connected with the monitoring module, the monitoring module is electrically connected with the rechargeable battery.

Preferably, the handheld sound collecting chest piece further comprises a first MCU controller, a first ethernet connector, and a second MCU controller, a second ethernet controller and a second ethernet connector which are arranged in the sound collecting chest piece, wherein the first MCU controller is electrically connected with the first ethernet controller, the first ethernet controller is electrically connected with the first ethernet connector, the second MCU controller is electrically connected with the second ethernet controller, the second MCU controller is electrically connected with the second ethernet connector, and the first ethernet connector is in uniform PC signal connection with the second ethernet connector.

Secondly, the invention also provides the following technical scheme, and the wireless heart noise detection method comprises the following steps:

the method comprises the following steps: the heart rate signal of the patient is detected by the photoelectric sensor, amplified and compared and then transmitted to the single chip microcomputer, the single chip microcomputer processes the signal and displays the noise signal of the patient on the first display screen;

step two: meanwhile, the first MCU controller transmits signals to the first Ethernet controller, the signals are converted into wireless signals through the first Ethernet controller and are sent to the PC through the first Ethernet connector, data are transmitted to the second Ethernet connector in the hand ring of the patient through the PC, the second Ethernet connector transmits the signals to the second Ethernet controller, the second Ethernet controller converts the data into electric signals again and transmits the electric signals to the second MCU controller, and the electric signals are displayed on the second display screen after being processed by the second MCU controller;

step three: when the pickup chest piece is in the charging range of the wireless charger body, the power supply module is directly provided by a 22V alternating current power supply, high-frequency alternating current is generated in the transmitting coil after high-frequency inversion, alternating current generates a changing magnetic field to be transmitted, the receiving coil receives energy transmitted by the transmitting coil through electromagnetic induction coupling, and the energy is charged to the rechargeable battery after rectification and conversion.

Compared with the prior art, the invention has the beneficial effects that:

1. the sound-picking chest piece fixing device has the advantages that through a small patch type design, an in-ear type joint and a lead wire of a traditional stethoscope are omitted, the device is small and convenient, and the sound-picking chest piece is fixed through the sucker, so that the sound-picking chest piece fixing device is more convenient to use.

2. The invention realizes real-time interaction with the pickup chest piece through the matched bracelet in a wireless transmission mode, can display the heart rate signal and the heart noise signal of the patient on the bracelet in real time, and is convenient for observation and recording.

3. According to the invention, the automatic charging can be completed only by approaching the instrument body to the wireless charger in a wireless charging mode, so that the use convenience and universality are further improved.

Drawings

FIG. 1 is a schematic view of the entire structure of the sound-collecting chest piece of the present invention;

FIG. 2 is a second schematic view of the entire structure of the sound-collecting chest piece of the present invention;

FIG. 3 is a third schematic view of the entire structure of the sound-collecting chest piece of the present invention;

FIG. 4 is a fourth illustration of the overall structure of the sound-collecting chest piece of the present invention;

FIG. 5 is a schematic diagram of an overall structure of the wireless charger of the present invention;

FIG. 6 is a second schematic diagram of the overall structure of the wireless charger of the present invention;

FIG. 7 is an exploded view of the wireless charger of the present invention;

FIG. 8 is a schematic view of the bracelet of the present invention;

FIG. 9 is a block diagram of the heart rate detection of the present invention;

FIG. 10 is a circuit diagram of a sampling circuit of the photoelectric sensor of the present invention;

FIG. 11 is a pin diagram of a low pass amplifier according to the present invention;

FIG. 12 is a circuit diagram of a low pass amplifier of the present invention;

FIG. 13 is a circuit diagram of the single-chip microcomputer according to the present invention;

FIG. 14 is a circuit diagram of a digital display circuit according to the present invention;

FIG. 15 is a block diagram of a wireless transmission section in the present invention;

FIG. 16 is a circuit diagram of the MCU controller and the Ethernet controller according to the present invention;

FIG. 17 is a pin diagram of the MCU controller of the present invention;

FIG. 18 is a pin diagram of an Ethernet controller according to the present invention;

FIG. 19 is a circuit diagram of an Ethernet controller and an Ethernet connector according to the present invention;

FIG. 20 is a circuit diagram of a sampling circuit of the high frequency inverter circuit according to the present invention;

FIG. 21 is a circuit diagram of a driving circuit according to the present invention;

FIG. 22 is a circuit diagram of a square wave generating circuit of the present invention;

FIG. 23 is a circuit diagram of a receiving coil and a rectifying-filtering circuit according to the present invention;

FIG. 24 is a circuit diagram of a conversion circuit of the present invention;

fig. 25 is a circuit diagram of the conversion circuit of the present invention.

In the figure: 1. picking up a chest piece; 10. a first display screen; 11. a power button; 12. adjusting a knob; 13. pasting a piece; 14. a first suction cup; 2. a wireless charger body; 20. a base; 200. a jack; 21. an indicator light; 22. a power line; 23. a power plug; 24. a second suction cup; 240. inserting a column; 241. a spring; 25. hanging and buckling; 250. a strip-shaped groove; 3. a bracelet; 30. a rubber belt; 31. a second display screen; 32. a knob.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Example 1:

the utility model provides a wireless heart noise detecting system, including pickup chest piece 1, wireless charger body 2 and bracelet 3, pickup chest piece 1 is disc structure, surface at pickup chest piece 1 is equipped with first display screen 10, on pickup chest piece 1 and be located first display screen 10 below and be equipped with power button 11 and adjust knob 12, the bottom surface central point of pickup chest piece 1 puts and is equipped with paster 13, be equipped with photoelectric sensor in the paster 13, the bottom surface of pickup chest piece 1 just is close to the edge and is equipped with a plurality of first sucking discs 14, directly laminate pickup chest piece 1 at patient chest position during the collection heart rate signal, first sucking disc 14 can the actuation fix on skin, the photoelectric sensor through in the paster 13 gathers patient's heart rate signal.

The bottom of wireless charger body 2 is equipped with base 20, and the top of wireless charger body 2 is equipped with pilot lamp 21, has power cord 22 at the end connection of wireless charger body 2, and the end of power cord 22 is equipped with power plug 23, provides the required power that charges for wireless charger body 2 in inserting power plug 23 in the power.

The bottom four corners of the wireless base 20 are provided with the second suckers 24, the top of the second sucker 24 is provided with an insert post 240, the top of the insert post 240 is connected with a spring 241, the bottom of the wireless charger body 2 is provided with a jack 200 corresponding to the insert post 240, the insert post 240 is inserted into the jack 200 and is connected with the jack 200 in a sliding manner, the center of the bottom of the base 20 is provided with a hanging buckle 25, the tail end of the hanging buckle 25 is provided with a strip-shaped groove 250, the top of the spring 241 is adhered to the inner end surface of the jack 200 through glue, the wireless charger body 2 can be fixed on a smooth ground or a wall through the second sucker 24, the wireless charger body 2 can be hung on guard rails and other positions on a bed through the hanging buckle 25, the strip-shaped groove 250 is formed in the hanging buckle 25, nails can be firstly nailed on the wall, and then hung on the nails through the strip-shaped groove 250, the universality of the wireless charger body, the convenience of use is improved.

The surface of bracelet 3 is equipped with second display screen 31, and the bottom of bracelet 3 is equipped with rubber tape 30, and the both ends of rubber tape 30 are connected in the both ends of bracelet 3, are equipped with knob 32 on the lateral wall of bracelet 3, wear bracelet 3 on patient's wrist through rubber tape 30, realize the real-time interaction with pickup chest spare 1.

Example 2:

as a second embodiment of the present invention, the present invention further includes a low pass amplifier, a comparator, a single chip microcomputer and a digital display circuit which are disposed on the integrated circuit board in the component 1, wherein the output end of the photoelectric sensor is electrically connected to the low pass amplifier, the low pass amplifier is electrically connected to the comparator 54, the comparator is electrically connected to the I/O interface of the single chip microcomputer, and the I/O interface of the single chip microcomputer is electrically connected to the digital display circuit.

Specifically, this embodiment adopts singlechip AT89C51 as control core, realizes heart rate monitoring system's basic measurement function. The hardware block diagram of the system is shown in fig. 9: specifically, when the patch 13 is attached to the chest area of a patient, the flow rate of blood in the blood vessel changes as the heart beats. Because in photoelectric sensor's light transmission path, the change of blood saturation in the blood vessel can cause the intensity of light to change, consequently with the beat of heartbeat corresponding, the electric current of infrared receiving triode also follows to change, and this just makes infrared receiving triode output pulse signal. The signal is amplified, filtered and shaped and then output, and the output pulse signal is used as an external interrupt signal of the singlechip. The single chip circuit calculates the input pulse signal and sends the result to the nixie tube for display.

Specifically, the photoelectric sensor in this embodiment is composed of an infrared light emitting diode and a receiving triode. When the GaAs infrared light-emitting diode is used as a light source, the drift of a heart rate wave curve caused by respiratory motion can be basically inhibited. The infrared receiving triode can generate electric energy under the irradiation of infrared light, and is characterized by converting an optical signal into an electric signal. In this embodiment, the infrared receiving transistor and the infrared emitting diode are oppositely arranged to obtain the optimal directional characteristic, and apart from being absorbed by human tissues, a part of the light emitted from the light source is diffusely reflected by blood and the rest is transmitted out. The receiving type of the photoelectric sensor by light can be classified into a transmissive type and a reflective type. The transmission type emitting light sources and the photosensitive receiving devices are arranged at equal distances and symmetrically, and the method can better reflect the time relation of the heart rhythm. Therefore, the invention adopts the transmission type photoelectric sensor, realizes photoelectric isolation and reduces the interference on a post-stage analog circuit.

The heart rate signal sampling circuit of the photoelectric sensor is shown in fig. 10, U4 is an infrared transmitting and receiving device, and the larger the current in the infrared emitting diode is, the smaller the emitting angle is, the larger the generated emitting intensity is, so the requirement for selecting R17 resistance is higher. R17 selects 270 Ω and is also based on ir receiving triode sensed ir sensitivity considerations. R17 is too big, and the current through infrared emitting diode is on the small side, and infrared receiving triode can't distinguish the signal when having the heartbeat and not having the heartbeat. On the contrary, when R17 is too small, the passing current is too large, the infrared receiving triode can not accurately distinguish signals with and without heartbeat, and pulse signals are acquired by detecting a human body, so that heart rate signals are obtained. When the light leaves the sensor or detects strong interference light, the direct current voltage at the input end can change greatly, and in order to prevent the direct current voltage from leaking to the input end of the U3A to cause error indication, the direct current voltage is isolated by a bipolar coupling capacitor formed by connecting C8 and C10 in series.

The low-pass amplifier adopts an LM324 four-operational amplifier integrated circuit, as shown in figure 11, the integrated circuit adopts a 14-pin dual-in-line plastic package, four groups of operational amplifiers with the same form are contained in the integrated circuit, the four groups of operational amplifiers are mutually independent except for the sharing of a power supply, the integrated circuit is provided with 5 leading-out pins, wherein, the plus and the minus are two signal input ends, the V plus and the V minus are a positive and a negative power supply end, and the Vo is an output end. Of the two signal input ends, Vi- (-) is an inverting input end and indicates that the phase of the signal of the output end Vo of the operational amplifier is opposite to that of the input end; vi + (+) is the non-inverting input terminal, and the signal representing the operational amplifier output Vo is the same as the input terminal in phase, and since the signal received by the photoelectric sensor is very weak and is easily interfered by the peripheral circuits, the system must provide power for the signal processing circuit. The detected signal still has a large bias voltage after being amplified by the LM324 amplifier, so a filter capacitor must be added at the signal input end to filter the dc component in the circuit and ensure that the transmission of the ac signal is not affected. The system designs a low-pass amplifier according to the calculation of the beating times of the human heart rate after exercise to 200 times/minute, as shown in figure 12. R24 and C6 form a low-pass filter to further filter residual interference, the cut-off frequency is determined by R24 and C6, the operational amplifier U3A amplifies signals, and the amplification factor is determined by the ratio of R22 to R24. The output signal after low-pass amplification is a pulsating sine wave with noise superimposed thereon. According to the transfer function of the first-order active filter circuit, the following can be obtained:

the magnification is:

the cut-off frequency is:

the low frequency characteristic is satisfactory in consideration that the frequency at which the human body beats 200 beats/minute is 3.3 Hz. The output signal after low-pass amplification is a pulsating sine wave with noise superimposed thereon.

Secondly, the single chip microcomputer adopts an AT89C51 single chip microcomputer minimum system as a signal processing circuit, as shown in fig. 13, pulse levels from a sampling and shaping output circuit are input INTO/INTO pins of the single chip microcomputer AT89C51, the single chip microcomputer is set to be in a negative jump interruption triggering mode, the single chip microcomputer 55 is triggered to generate interruption and time when a pulse falling edge arrives each time, and the number of times of a pulse heartbeat is increased by one; timer interrupts essentially complete a one minute timing function.

Further, the digital display circuit adopts dynamic scanning of the LED nixie tube to display data. The two 4-bit common anode LED nixie tubes form 8-bit display, wherein two

bits

0 and 1 display time in measurement, two

bits

3 and 4 display heartbeat times in measurement, and two

bits

6 and 7 are used for displaying data of the last measurement, as shown in fig. 14. The P0 port of the single chip controls the display character type, and the P2 port controls the display character position.

For the convenience of charging, as shown in fig. 20, the wireless heart noise detection system further includes a wireless transmitting system disposed in the wireless charger body 2 and a wireless receiving system disposed in the sound-picking chest piece 1, the wireless transmitting system includes a power supply module, a square wave generating circuit, a driving circuit, a high-frequency inverter circuit and a transmitting coil, the wireless receiving system includes a rectifying and filtering circuit, a converting circuit, a monitoring module, a rechargeable battery and a receiving coil, the power supply module and the square wave generating circuit are both electrically connected with the driving circuit, the driving circuit is electrically connected with the high-frequency inverter circuit, the high-frequency inverter circuit generates high-frequency alternating current on the transmitting coil, the variable magnetic field generated by the variable current is transmitted to the receiving coil, the magnetic field received by the receiving coil is coupled to the rectifying and filtering circuit, the rectifying and filtering circuit is electrically connected with the converting circuit, and the converting circuit is electrically connected, the monitoring module is electrically connected with the rechargeable battery.

Specifically, the monitoring module takes an AT89C51 singlechip as a core and an LCD12864 as a basis of a human-computer interaction interface, so that the visualization and the imaging of the battery charging state are realized.

The power supply module is provided by a 22V alternating current power supply, and generates high-frequency alternating current at the transmitting coil after high-frequency inversion. The alternating current generates a changing magnetic field to be emitted, the receiving coil receives the energy emitted by the emitting coil through electromagnetic induction coupling, and the rechargeable battery is charged after rectification conversion.

The high-frequency inverter circuit is characterized in that a core of a transmitting circuit is used for providing alternating current required by resonance for an LC resonance transmitting circuit, the high-frequency inverter circuit has the main function of converting 12V direct current provided by a power supply module 80 into alternating current, the high-frequency inverter circuit adopts a full-bridge inverter structure consisting of MOS tubes, 4 MOS switching tubes form the full-bridge circuit as shown in fig. 21, when MOS tubes Q1 and Q04 are conducted, Q2 and Q3 are cut off, current is transmitted from the MOS tube Q1 to the MOS tube Q4 through an LC circuit, when MOS tubes Q2 and Q3 are conducted, the MOS tubes Q1 and Q4 are cut off simultaneously, the current is circulated through the MOS tubes Q3 and LC to MoS tube Q2 to supply the alternating current for the LC circuit to transmit, the DC current is selected and screened on the MOS tubes, cost factors are considered, a low-impedance type IR is finally selected and produced by the fast switching tube IRF3205 as a switching device of the full-bridge IR driving device, the switching device with the main performance of ①, a monolithic switching tube, a monolithic switching circuit, a monolithic resistor 8, a working resistor, a transistor Q ② and a resistor, a transistor.

An IR2110 chip in the driving circuit needs PWM waves, and a square wave generating circuit with adjustable duty ratio and frequency needs to be designed for debugging convenience of the whole charging module. The square wave generating circuit of the embodiment adopts a 555 chip, and the duty ratio and the frequency of the square wave can be controlled by adjusting the slide rheostat. A square wave generating circuit formed by an NE555 chip, as shown in figure 23. RA is the left end on-resistance of R2, RB is the resistance value when the right end of R2 is conducted, when the circuit is electrified, the power supply charges the capacitor C1 through a R, RA branch circuit, at the moment, 3 pins output high level, when the potential of C1 is charged to 2/3Vcc, the 555 internal comparator enables the RS trigger to output low level, a discharging loop is opened through a NAND gate, the capacitor discharges, at the moment, low level is output, when the potential of the capacitor is discharged to 1/3Vcc, the comparator enables the RS trigger to output high level, the discharging loop is closed, the capacitor charges, high level is output, and the charging time tr of the circuit in a single period is set; 0.7(R1+ RA) C1, and 0.7(R3+ RB) C1, the output square wave frequency is: 1/(0.7R _1+ R _ a + R _ B + R _3C _1) ═ 1/(0.7R _1+ R _2+ R _3C _1),

the duty ratio is q% ((R _1+ R _ a)/(R _1+ R _2+ R _ 3)) × 100%. since the driving circuit needs two opposite-phase PWM waves, in order to prevent the MOSFET of the upper and lower bridge arms from going through in the power supply, the principle of turning on after turning off must be followed, therefore, the two PWM waves of the high and low voltage channels of the input IR2110 should leave a "dead zone" properly, that is, the duty ratio of the wave generated by the square wave generator formed by 555 is not equal to 50%, and the two opposite-phase PWM waves are generated by the wave generated by 555 through the inverter.

Since the receiving end receives alternating current and the charging battery needs direct current, the receiving end circuit needs to convert the alternating current into the direct current, as shown in fig. 24, the task is mainly accomplished by a rectifying and filtering circuit which depends on the unidirectional conductivity of a diode. The embodiment utilizes a bridge rectifier circuit, and the bridge rectifier circuit has the advantages of high output voltage, small ripple voltage and low maximum reverse voltage born by the tube. According to the requirement, the rectifier diode requires fast recovery and has a higher upper current limit, and 1N5819 is selected by comprehensive consideration.

The main control unit circuit in the charging state monitoring module in the system takes a low-voltage and high-performance CMOS single chip microcomputer AT89C51 produced by ATMEL company in the United states as a core. The chip contains a Flash read-only program memory which is 4kbytes and can be repeatedly erased and written and a random access data memory (RAM) which is 128 kbytes, the device is produced by adopting the high-density and nonvolatile storage technology of ATMEL company, the device is compatible with a standard MCS-51 instruction system, a universal 8-bit Central Processing Unit (CPU) and a Flash storage unit are arranged in the chip, and the AT89C51 single chip with strong functions can be applied to a plurality of occasions with high cost performance and can be flexibly applied to various control fields.

In addition, the charging voltage is used as an analog quantity, and needs to be converted into a digital quantity by a conversion circuit so as to be used for the singlechip to perform read-write calculation to complete control. The analog-to-digital conversion chip adopted by the design is ADC0804 which is a CMOS8 bit single-channel successive approximation type analog-to-digital converter, a circuit diagram is shown in FIG. 25, when CS and RD ends are in low level, the ADC0804 outputs the converted digital signals to other processing units through DB7 DB 0. When both the CS and WR terminals are at low level, the ADC is cleared to reset the system, and when WR changes from low level to high level, the ADC0804 starts to convert signals. CLKIN and CLKR are input and output ends of frequency, and generally require a frequency range of 100KHz to 1.28 MHz. The clock signal required by the analog-to-digital converter is generally generated by an external RC circuit, and the clock frequency f is 1/1.1 RC.

Secondly, in order to realize the data interaction of pickup chest piece 1 and bracelet 3, the system also includes a first MCU controller arranged in pickup chest piece 1, a first Ethernet controller, a first Ethernet connector and a second MCU controller arranged in bracelet 3, a second Ethernet controller and a second Ethernet connector, wherein the first MCU controller is electrically connected with the first Ethernet controller, the first Ethernet controller is electrically connected with the first Ethernet connector, the second MCU controller is electrically connected with the second Ethernet controller, the second MCU controller is electrically connected with the second Ethernet connector, and the first Ethernet connector is connected with the second Ethernet connector by uniform PC signals.

Specifically, the first MCU controller and the second MCU controller adopt C8051F series microcontrollers, and the microcontrollers of the types adopt unique CIP-8051 structures, so that the speed of a single-cycle instruction is increased to 12 times of that of the original 8051. The C8051F series microcontroller also integrates IAP-capable FLASH memory, IO crossbar, numerous functional modules and IO interfaces, low voltage and low power consumption, multi-clock and reset systems, JTAG interfaces, sophisticated data/program security and encryption measures, which have exceeded the current 8-bit microcontroller level in many ways. The C8051F microcontroller is digital-analog hybrid integrated and has SoC color. In a C8051F series singlechip, both C8051F12X and C8051F13X can reach higher frequency, and have larger memory and FLASH storage areas and an external memory interface EMIF. The pins are shown in fig. 17.

The first and second ethernet controllers in this embodiment employ CP2201 that integrates IEE802.3 MAC and 10BASE-T PHY, is fully compatible with 100/1000BASE-T networks, full/half duplex, adaptive, automatic polarity detection and correction, collision automatic retransmission, automatic padding and CRC generation, supports broadcast and multicast MAC addressing, parallel host interface (30Mbps transmission rate), 8 bit multiplexing, Intel or Motorola bus support, receive packet interrupts and wake-on-network interrupts, 8 kbbfash memory, factory unique-48 bit MAC address, LED output driver (connect/active), dedicated 2KB transmit buffer RAM and 4KB receive FIFO buffer RAM, power-on reset, 5V tolerant I/0, and most notably a chip with very rich software support, making programming much less difficult, programmers can focus their attention on the writing of applications. Software support includes a free TCP/IP stack, TCP/IP configuration wizards, etc.

As seen in fig. 16, the microcontroller uses 8 pins to connect to 8 pins of the ethernet controller, and knows the operation mode of the ethernet controller using data line and address line multiplexing.

The pin connections of the microcontroller C8051F120 in FIG. 16 are obtained using the general I/O ports P4-P7. Each port I/O pin may be configured as a push-pull or open-drain output. The fixed "weak pull-up" in standard 8051 can be disabled altogether, which provides further power savings for low power applications, and the C8051F120 microprocessor also features its own features, namely programmable I/O and cross-bar switches. In particular, the use of a C8051F120 microcontroller requires, prior to the use of the microcontroller, the selection of the numerous functions that the controller can provide, and then the setting of the microcontroller, which requires the module to be brought to the pins of the chip for use.

The ethernet controller also needs to connect an ethernet connector to transmit data to the ethernet connection, and the specific connection is shown in fig. 19.

Example 3:

in a specific use process, the invention sequentially provides a wireless heart noise detection method, which comprises the following steps: the method comprises the following steps:

the method comprises the following steps: the heart rate signal of the patient is detected by the photoelectric sensor, amplified and compared and then transmitted to the single chip microcomputer, the single chip microcomputer processes the signal and displays the noise signal of the patient on the first display screen 10;

step two: meanwhile, the first MCU controller transmits signals to the first Ethernet controller, the signals are converted into wireless signals through the first Ethernet controller and are sent to the PC through the first Ethernet connector, data are transmitted to the second Ethernet connector in the patient bracelet 3 through the PC, the second Ethernet connector transmits the signals to the second Ethernet controller, the second Ethernet controller converts the data into electric signals again and transmits the electric signals to the second MCU controller, and the electric signals are displayed on the second display screen 31 after being processed by the second MCU controller;

step three: when the pickup chest piece 1 is in the charging range of the wireless charger body 2, the power supply module is directly provided by a 22V alternating current power supply, high-frequency alternating current is generated in the transmitting coil after high-frequency inversion, alternating current generates a changing magnetic field to be transmitted, the receiving coil receives energy transmitted by the transmitting coil through electromagnetic induction coupling, and the charging battery is charged after rectification conversion.

It is small and exquisite portable through the design of trisome discrete to the in-ear type stethoscope head in the past has been saved to data are shown on bracelet 3 in real time through wireless transmission's mode, form visual chart form through the signal of collecting, make things convenient for audio-visual observation and the heart noise data of judging continuous disease.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a wireless heart noise detecting system, includes pickup chest spare (1), wireless charger body (2), bracelet (3) and sets up low pass amplifier, comparator, singlechip and digital display circuit on integrated circuit board in pickup chest spare (1), its characterized in that: pickup chest spare (1) is disc structure the surface of pickup chest spare (1) is equipped with first display screen (10), be equipped with power button (11) and adjust knob (12) below being located first display screen (10) on pickup chest spare (1), the bottom surface central point of pickup chest spare (1) puts and is equipped with paster (13), be equipped with photoelectric sensor in paster (13), the bottom surface of pickup chest spare (1) just is close to the edge and is equipped with a plurality of first sucking discs (14).

2. The wireless cardiac noise detection system of claim 1, wherein: the bottom of wireless charger body (2) is equipped with base (20), the top of wireless charger body (2) is equipped with pilot lamp (21) the end connection of wireless charger body (2) has power cord (22), just the end of power cord (22) is equipped with power plug (23).

3. The wireless cardiac noise detection system of claim 2, wherein: the bottom four corners department of base (20) all is equipped with second sucking disc (24), the top of second sucking disc (24) is equipped with inserts post (240), the top of inserting post (240) is connected with spring (241), the bottom surface of wireless charger body (2) with the position of inserting post (240) and corresponding has seted up jack (200), insert post (240) peg graft in jack (200) and with jack (200) sliding connection, be equipped with in the bottom surface center department of base (20) and hang knot (25), the end of hanging knot (25) is opened there is bar groove (250).

4. The wireless cardiac noise detection system of claim 3, wherein: the surface of bracelet (3) is equipped with second display screen (31), the bottom of bracelet (3) is equipped with rubber tape (30), just the both ends of rubber tape (30) connect in the both ends of bracelet (3), be equipped with knob (32) on the lateral wall of bracelet (3).

5. The wireless cardiac noise detection system of claim 4, wherein: the output end of the photoelectric sensor is electrically connected with the low-pass amplifier, the low-pass amplifier is electrically connected with the comparator (54), the comparator is electrically connected with the I/O interface of the single chip microcomputer, and the I/O interface of the single chip microcomputer is electrically connected with the digital display circuit.

6. The wireless cardiac noise detection system of claim 5, wherein: the wireless receiving system comprises a rectification filter circuit, a conversion circuit, a monitoring module, a rechargeable battery and a receiving coil, the power supply module and the square wave generating circuit are electrically connected with the driving circuit, the driving circuit is electrically connected with the high-frequency inverter circuit, the high-frequency inverter circuit generates high-frequency alternating current on the transmitting coil, the abrupt current generates a changed magnetic field and transmits the changed magnetic field to the receiving coil, the magnetic field received by the receiving coil is coupled to the rectification filter circuit, the rectification filter circuit is electrically connected with the conversion circuit, and the conversion circuit is electrically connected with the monitoring module, the monitoring module is electrically connected with the rechargeable battery.

7. The wireless cardiac noise detection system of claim 6, wherein: still including setting up first MCU controller, first ethernet connector in pickup chest piece (1) and setting up second MCU controller, second ethernet controller and the second ethernet connector in bracelet (3), first MCU controller with first ethernet controller electric connection, first ethernet controller with first ethernet connector electric connection, second MCU controller with second ethernet controller electric connection, second MCU controller with second ethernet connector electric connection, first ethernet connector with the even PC signal connection of second ethernet connector.

8. A wireless heart murmur detection method is characterized in that: the method comprises the following steps:

the method comprises the following steps: the heart rate signal of the patient is detected by the photoelectric sensor, amplified and compared and then transmitted to the single chip microcomputer, the single chip microcomputer processes the signal and displays the noise signal of the patient on the first display screen (10);

step two: meanwhile, the first MCU controller transmits signals to the first Ethernet controller, the signals are converted into wireless signals through the first Ethernet controller and are sent to the PC through the first Ethernet connector, data are transmitted to the second Ethernet connector in the patient bracelet (3) through the PC, the second Ethernet connector transmits the signals to the second Ethernet controller, the second Ethernet controller converts the data into electric signals again and transmits the electric signals to the second MCU controller, and the electric signals are displayed on the second display screen (31) after being processed by the second MCU controller;

step three: when the pickup chest piece (1) is in the charging range of the wireless charger body (2), the power supply module is directly provided by a 22V alternating current power supply, high-frequency alternating current is generated in the transmitting coil after high-frequency inversion, the alternating current generates a changing magnetic field to be transmitted, the receiving coil receives energy transmitted by the transmitting coil through electromagnetic induction coupling, and the energy is charged for the rechargeable battery after rectification and conversion.