CN109330863A

CN109330863A - Feedback record system is instructed in a kind of pressing of CPR

Info

Publication number: CN109330863A
Application number: CN201811424578.4A
Authority: CN
Inventors: 孙东军; 陆鉴良; 章军辉; 俞斌; 龚玉琪; 周春华
Original assignee: Suzhou Still Medical Technology Co Ltd
Current assignee: Suzhou Still Medical Technology Co Ltd
Priority date: 2018-11-27
Filing date: 2018-11-27
Publication date: 2019-02-15

Abstract

The invention discloses a kind of pressings of CPR to instruct feedback record system, LED drive circuit, key press detecting circuit, audio frequency processing circuit, sensor Acquisition Circuit, the communicating circuit, data storage circuitry for including: central processing unit and being attached thereto, wherein the sensor Acquisition Circuit includes but is not limited to pressure sensor Acquisition Circuit and acceleration transducer Acquisition Circuit.The present invention provides the equipment of a kind of guidance of pressing in real time and pressing Quality Feedback, it can be very good to instruct medical staff to be that patient carries out CPR, improve treatment quality.

Description

Feedback record system is instructed in a kind of pressing of CPR

Technical field

The present invention relates to the field of medical instrument technology, particularly relates to a kind of CPR pressing and instruct feedback record system System.

Background technique

Patient is when cardiac accident all standing occurs for a variety of causes, in time using traditional artificial pressing or mechanical Heart-lung restoring instrument Pressing is the best method of CPR.The situation is critical when CPR and it is complicated, can successful rescue other than regarding the patient's condition, it is anxious The method and standard rescued have been also determinant, even if being all that medical personnel also has physical strength, experience, the difference of manpower, If above-mentioned difference can be bigger in the state of lacking medical worker.In other words professional personnel are also extremely difficult to effectively Ground cardiopulmonary resuscitation effect because generally lain substantially in first aid the nature done one's best, compression number and depth because Rescuer's individual physique and it is different, affect the success rate of recovery.

During CPR external chest compression, pressing guidance in real time and pressing Quality Feedback are very beneficial for pressing and apply It rescues personnel and adjusts pressing parameter in time, to obtain the CPR and treatment success rate of high quality.Therefore " doctor in clinical application Suffering from " both sides there is an urgent need to equipment high-tech, containing real-time pressing guidance and pressing Quality Feedback instruct the medical staff to be Patient carries out CPR.

Therefore, the present inventor needs to conceive a kind of new technology to improve its problem.

Summary of the invention

The present invention provides a kind of pressings of CPR to instruct feedback record system, provides to solve above-mentioned technical problem Support on hardware.

The technical scheme is that

Feedback record system is instructed in a kind of pressing of CPR, comprising: central processing unit and the LED being attached thereto driving electricity Road, key press detecting circuit, audio frequency processing circuit, sensor Acquisition Circuit, communicating circuit, data storage circuitry, wherein the biography Sensor Acquisition Circuit includes but is not limited to pressure sensor Acquisition Circuit and acceleration transducer Acquisition Circuit.

It preferably, further include power system circuit, the power system circuit includes but is not limited to charge management circuit, fills Battery, electric power management circuit, battery power detection circuit, power-switching circuit, the power-switching circuit include but unlimited In 3.3V power circuit and 1.8V power circuit.

It preferably, further include RTC circuit, the RTC circuit includes but is not limited to RTC clock source circuit and RTC work electricity Source circuit.

Preferably, the audio frequency processing circuit includes but is not limited to audio frequency processing circuit, playback circuit and recording circuit.

Preferably, the data storage circuitry includes but is not limited to system data storage circuit and user data storage electricity Road.

Preferably, the communicating circuit includes but is not limited to USB communicating circuit, WIFI communication circuit and bluetooth communication electricity Road.

Preferably, pressure sensor Acquisition Circuit includes signal amplifier U11, pressure sensor R67, resistance R63, resistance R64, resistance R65, resistance R66, capacitor C49, capacitor C50, wherein the first foot of the signal amplifier U11 respectively with resistance R63, resistance R65, capacitor C50 connection, third foot are grounded after connecting with pressure sensor R67；Resistance R66 and capacitor C49 are simultaneously Connection is arranged between the third foot of signal amplifier U11 and the 4th foot；4th foot of the one end resistance R64 and signal amplifier U11 Connection, the other end are connect with central processing unit；The signal amplifier U11 is LMV321IDBVT amplifier.

Preferably, the acceleration transducer Acquisition Circuit include acceleration sensor chip U1, resistance R1, capacitor C1, Capacitor C2, wherein one end of the resistance R1 is connect with the 6th pin and capacitor C2 of acceleration sensor chip U1 respectively, separately One end is connect with capacitor C1, and acceleration sensor chip U1 is ADXL345 digital acceleration sensor chip.

Preferably, the rechargeable battery is 503450 lighium polymer lithium ion batteries.

Preferably, the central processing unit is STM32F103RCT6 processor.

By adopting the above technical scheme, the present invention include at least it is following the utility model has the advantages that

Feedback record system is instructed in CPR pressing of the present invention, and the visual cues and auditory cues of optimization are common Feedback, adapts to more usage scenarios, (environment or objective condition, such as environment are dazzling, Huo Zheshi when only visual feedback is obstructed The person of rescuing can not observe) or audio feedback be obstructed (environment or objective condition, as environment is noisy or rescuer can hear) when, this dress Setting still effectively can prompt and feed back, greatly reduce feedback be obstructed generate using influence probability (only when the two is obstructed, this The feedback of device is just obstructed completely).Entire treatment process completely stores and records, and crucial audio recording information increases The level of detail of analysis and the research of data on file after treatment is conducive to constantly improve pressing quality.It can be real during treatment When with other monitorings and display equipment interconnection, share the information of pressing, in addition can teleengineering support this type of information, it is convenient timely Analysis and adjustment pressing can provide more treatment instructions based on this.

Detailed description of the invention

Fig. 1 is the structural schematic diagram that feedback record system is instructed in CPR of the present invention pressing；

Fig. 2 is the circuit diagram of charge management circuit of the present invention；

Fig. 3 is the circuit diagram of electric power management circuit of the present invention and key press detecting circuit；

Fig. 4 is the circuit diagram of battery power detection circuit of the present invention；

Fig. 5 is the circuit diagram of 3.3V power supply of the present invention；

Fig. 6 is the circuit diagram of 1.8V power supply of the present invention；

Fig. 7 a is the circuit diagram of LED drive circuit of the present invention；

Fig. 7 b is the circuit diagram of LED drive circuit of the present invention；

Fig. 8 is the circuit diagram of key press detecting circuit of the present invention；

Fig. 9 is the circuit diagram of audio frequency processing circuit of the present invention and recording circuit；

Figure 10 is the circuit diagram of playback circuit of the present invention；

Figure 11 is the circuit diagram of pressure sensor Acquisition Circuit of the present invention；

Figure 12 is the circuit diagram of acceleration transducer Acquisition Circuit of the present invention；

Figure 13 is the circuit diagram of USB communicating circuit of the present invention；

Figure 14 is the circuit diagram of WI-FI communicating circuit of the present invention；

Figure 15 is the circuit diagram of BlueTooth communicating circuit of the present invention；

Figure 16 is the circuit diagram of system data storage circuit of the present invention；

Figure 17 is the circuit diagram of user data storage circuit of the present invention；

Figure 18 is the circuit diagram of central processing unit of the present invention.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.

As shown in Fig. 1 to Figure 18, feedback record system is instructed in a kind of CPR pressing to meet of the invention, comprising: Central processing unit and the LED drive circuit being attached thereto, audio frequency processing circuit, sensor Acquisition Circuit, lead to key press detecting circuit Circuit, data storage circuitry are interrogated, wherein the sensor Acquisition Circuit includes but is not limited to pressure sensor Acquisition Circuit and adds Velocity sensor Acquisition Circuit.

Preferably, the central processing unit is STM32F103RCT6 processor.

Circuit of the present invention, realizes integration scenario.Using ultra-thin rechargeable battery, and combine ultra-thin acceleration transducer Plate and pressure sensor etc., realize according to pressing depth with the feedback prompts of frequency, in addition, process of suing and labouring can also automatically record storage Press the audio-frequency information of parameter and automatic recording salvage at scene environment.Simultaneously can with other equipment wireless synchronization shared datas, Realize Real-Time Sharing information.Its concrete function is referring to table 1.

Table 1

The present embodiment is illustrated with reference to the accompanying drawing.

1. power system circuit

1.1 charge management circuits, for realizing the Charge Management to lithium battery.

It is TI company exclusively for lithium electricity that lithium polymer battery charging management chip, which selects BQ24093DGQT, BQ24093DGQT, The chip of pond Charge Management design.1% charging voltage precision, 10% charging current precision.

C10, C11: input and out-put supply filter capacitor.

R21: charging current is adjusted.It is short to fill current charging time greatly, but charging chip can generate heat.It charges by test cell The charging time, chip fever was not serious less than 2.5 hours in 800mA for electric current.ISET resistance calculations formula is RISET=[K (ISET)/I (OUT)], K (ISET) is constant 540, is exported electric current I (OUT)]=540/680=794.0mA ≈ 800mA.System Power supply and battery and joint conference's consumption charging current, the actual charging current of battery is about 700mA.Therefore R21=680R.

R24: charging is by current regulation.When cell voltage is charged to 4.0V or so, chip starts constant-voltage charge mode, fills Electric current reduces as cell voltage improves.Charging chip judges whether charging current is less than and sets after into constant-voltage charge mode Constant current threshold values is to determine whether full of simultaneously output state.R24 resistance calculations formula is RPRE-TERM=K (TERM) × % IOUT-FC, K (TERM) are constant 20000.5600/20000=28%, by electric current=800mA*28%=224mA.Work as electricity System can still consume the electric current of charging chip output when pond is fully charged, this circuit design is when charging current is less than 224mA Chip is judged as that electricity is full of.Therefore R24 is 5.6K.

R22:TS pin, this pin realize thermometric by external PTC, and external 100K resistance connects this function when not in use Ground.

ISET2 pin: for charging current to be arranged, when ground connection, charging current is then controlled by crus secunda ISET.

PG pin: for judging whether there is the input of 5V charging voltage, low level is exported when being inserted into 5V power supply.When input electricity PG pin exports 0V, 5V > 4.2V when pressure is higher than cell voltage；Chip interior is open-drain output mode, and R52 is pull-up resistor.

CHG pin: for judging battery charging state；Low level is exported when battery charging, when uncharged or charged At when export high level.Chip interior is open-drain output mode, and R23 is pull-up resistor

F2:0805L100 is 1A, action current 1.95A in 20 DEG C of maintenance electric currents.At 40 DEG C, maintenance electric current is 800mA, and charging current is 800mA.Parts selection can satisfy demand.

1.2 rechargeable batteries, realize the storage of electric energy, provide power supply for system.

503450 lighium polymer lithium ion battery memory effects are small, light-weight, are the first choices of handheld device battery.Capacity is 1000mAH can satisfy the new battery continuous work 4H demand of product.Maximum charging current is 1A/S.

1.3 electric power management circuits, the switching on and shutting down of control system power supply.

In view of being powered using battery, shutdown circuit is hardware shutdown, not soft-off of the CPU under low-power consumption mode. The electric current consumed when shutdown is the leakage current of semiconductor devices.

PMPB15XP DEG C when maximum current be 5.2A, completely be greater than DC-DC chip current.Impedance after conducting is 19m Ω.

Electric current is controlled by the way that whether control Q1 is connected.Cell voltage is 3.5~4.2V, and the Vg voltage of Q1 is battery electricity Pressure/2=1.75~2.1V, the voltage value of Vgs when meeting Q1 conducting

The condition that Q1 is connected: 1. pressing the button 2. insertion USB charging, 3. CPU pin progress power supply is enabled.

Preliminary examination compressor start up condition: it 1. presses the button；2. being inserted into USB；

Cut-off condition: CPU cancellation enables power pins；

1.31 battery power detection circuits realize the reading to cell voltage.

Battery voltage detection circuit is resistance series connection partial pressure mode, output voltage=cell voltage/2.Battery voltage detection Output of the circuit in PMOS, system closedown.

1.4 system power supply conversion circuits

1.4.1 3.3V power supply provides working power for cpu system.

TPS62046DGQ chip be TI company design DC-DC chip, transfer efficiency 95%, quiescent current 18uA, most Height, which provides 1.2A electric current, can satisfy demand.It is suitble to battery powered handheld device to use.Systems Theory average current is about 200mA, this chip can satisfy functional need.

1.4.2 1.8V power supply provides working power for audio processing chip.

1.8V power supply is the power supply of audio decoder chip VS1063 work, selects the SPX5205M5-L-1- of EXAR company 8/TR LDO chip.Quiescent current 70uA, highest provide 150mA electric current.Electric current needed for the CVDD power supply of VS1063 is maximum is 15mA can satisfy demand.C15 and C13 is to test optimum value after multiple reality is debugged.

2.LED driving circuit is responsible for driving and controls LED to shine.

LED is responsible for showing operating status, and using can be adopted with the highlighted three-color LED of independent control luminescent color, driving chip With the 74HC595-Q100 of NXP, single pin provides the electric current of 25mA, enough driving LED.By the way of three pieces cascade come into The transmission of row data, saves the I O port line of CPU.

Q2 is the triode for controlling LED power, and preventing booting powered on moment 74HC595, wherein random data is lighted LED.It is shown again by Q2 to LED power supply after correct data are sent to 74HC595.

R15 and R16 is current-limiting resistance and pull-up resistor, selects 1K for general material, reduces complete machine part category.3.3V/ (1K/1K+1K)=1.65V meets the pressure drop of triode ON state Vbe.

The LED current limliting current-limiting resistance of three kinds of colors is different, by changing the resistance value in current-limiting resistance experimental observation schematic diagram LED effect is best.

3. key press detecting circuit, for reading key-press status

R29: for reinforcing Key Scan pin floating anti-interference ability when key is not pressed, belong to pull down resistor.

C17: filter capacitor.

4. audio frequency processing circuit

4.1 audio frequency processing circuits, for audio coding and decoding.

VS1063S is the audio processing chip of VISI company design, is internally integrated audio decoder and encoding D SP, can reduce The burden of CPU.Chip communication uses spi bus, can record and be simultaneously operable with playback.

4.2 playback circuits, for playing sound.

By the audio analog signals amplification of audio chip output, by being output to loudspeaker after power amplifier chips amplified signal.

The VO1 and VO2 of power amplifier are differential signal output, and amplitude is identical when playing audio, opposite in phase.

Whether SPK_CTRL effect has signal output for control power amplifier, prevent booting moment or when without audio output by Noise output.

4.3 recording circuits, for recording.

Microphone circuit theory is similar to a potentiometer, and self-resistance also changes therewith when external voice changes.Pass through concatenation 2 end of microphone is generated voltage difference by resistance.

C23 and C26 is to filter out DC component；C24 is filter capacitor；C20 and C28 is power filtering capacitor；R68 is acted on Reduce microphone sensitivity.

5. sensor Acquisition Circuit

5.1 pressure sensor Acquisition Circuits, pressure sensor signal is amplified and is exported.

In view of handheld device is for power saving, system power source voltage will not be too high.Rail-to-rail signal amplifier is selected, is made Output signal reaches system power source voltage as far as possible.

Wherein R67 is pressure sensor, itself resistance value also can be different when by different pressure.

Operational amplifier circuit formula is Vout=((VCC3.3/ (R63+R65)) * R65) * ((R66/R67)+1), and R67 is variable Amount.

5.2 acceleration transducer Acquisition Circuits, for acquiring in real time and exporting acceleration value.

ADXL345 is the digital acceleration sensor chip of ADI company research and development, and can measure acceleration range is ± 16g, point Resolution is 16bit.

R1 is that 100R resistance or magnetic bead are used for power filter.C1 and C2 is decoupling capacitance.

6. communicating circuit

6.1 USB communicating circuits are communicated for USB2.0；It charges to lithium battery.

D12, D13: electrostatic protection pipe will do it protection, maintenance voltage 5V when voltage is more than 10V.

F1: preventing long-term overcurrent, and as charging current excessively 1.95A, circuit can overcurrent protection.Battery charge is maximum It is 800mA.Internal body temperature can increase when in view of battery charging, so selecting 0805L100；

R49, R50: signal buffer weakens overshoot effect；

R48: make PC (Host) identification from equipment high-speed equipment using 1.5K pull-up resistor；

C52: input power is filtered.

6.2WI-FI communicating circuit is used for WLAN, WI-FI data communication.

Third-party module is selected in WI-FI communication, and HF-LPT200 is single stream Wi-FI, working frequency range 2.4GHz, is supported WEP, WPA/WP2 mode.

The work of product is carried out data transmission by UART communication interface.

6.3 BlueTooth communicating circuits, for WLAN, Blue Toothe data communication,

Third-party module is selected in Blue Tooth communication, and ZLG9021P0-1 supports master slave mode, host at most to connect 8 A slave.Up to 50kbps message transmission rate supports AES encryption communications protocol.Built-in 32 ARMCortexM0 microcontrollers Device, low-power consumption, overall volume are smaller.

7. data storage circuitry

7.1 system data storage circuits are used for memory system data.

Storage chip is the flash storage W25Q128FVSIG, memory capacity 128M- that Winbond company releases BIT, 100,000 erasing-programming periods, time data memory are 25 years.Complete machine is communicated using four line SPI communication interfaces.

7.2 user data storage circuits, for storing user data.

Device selects the Micro SD card of consumer product, and small in size, light-weight and capacity is big.Circuit interface uses The tetra- line communication interface of SDIO that CPU hardware is supported.RN1, R38, R53 are pull-up resistor, and R54, R55, RN2 is signal buffer work With decrease overshoot effect.

8.RTC circuit

The design of 8.1RTC clock source circuit, provides working power for RTC.

Circuit provides power supply for RTC, when cell voltage provides electricity in the part RTC that 3.4V~4.2V is always cpu system Source, its power supply are not controlled by system power supply, ensure that the duration of power supply；The RTC even if under system hardware off-mode It is running.

For circuit using the reverse current characteristics of Zener diode come evanescent voltage, R51 is used to current limliting.

8.2 RTC working power circuits design, for providing clock source for RTC.

It is worked by starting of oscillation capacitor trigger crystal oscillator, the part RTC of clock signal input to CPU.Clock accuracy depends on crystalline substance Vibration and capacitance accuracy and temperature drift.

9. central processor circuit

CPU major function is to be analyzed and processed to the data of acquisition.STM32F103RCT6 is what STMicw Electronics released 32 ARM framework processors.

With Peripheral Interface abundant；Such as: built-in RTC block, built-in 12bit ADC, built-in timer, built-in ROM, RAM, built-in SDIO.

The periphery CPU capacitor is shunt capacitance, filters out digit chip IO switching state bring interference components.

The pressing parameter information and the recording that store the number date information, monitoring that use simultaneously may be implemented in the present embodiment Audio-frequency information, and synchronizing visual and sound sensation prompt feedback compression parameter CPR external chest compression guidance feedback record dress It sets.The not only pressing parameter of record monitoring in real time also passes through the environmental audio information at sound pick-up record scene.Pass through storage card Mode, the number date information used that is switched on every time, monitoring pressing parameter information and recording audio-frequency information, and by these The timeline of information is corresponding and number corresponds to, and stores.By wireless transport module, the data with other equipment are realized It is shared.

I.e. present invention optimizes visual cues and auditory cues common feedback, adapt to more usage scenarios, regard when only having Feel that feedback is obstructed (environment or objective condition, such as environment is dazzling or rescuer can not observe) or audio feedback is obstructed (environment Or objective condition, as environment is noisy or rescuer can hear) when, the present apparatus still effectively can be prompted and be fed back, and be greatly reduced Feed back the probability for being obstructed and generating using influencing (only when the two is obstructed, the feedback of the present apparatus is just obstructed completely).Entire treatment Process completely stores and records, crucial audio recording information, increase treatment after data on file analysis and research it is detailed Thin degree is conducive to constantly improve pressing quality.It can be total in real time with other monitorings and display equipment interconnection during treatment Enjoy the information of pressing, in addition can teleengineering support this type of information, it is convenient timely to analyze and adjust pressing, can provide based on this More treatment instructions.

The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one The widest scope of cause.

Claims

1. feedback record system is instructed in a kind of pressing of CPR characterized by comprising central processing unit and be attached thereto LED drive circuit, key press detecting circuit, audio frequency processing circuit, sensor Acquisition Circuit, communicating circuit, data storage circuitry, Described in sensor Acquisition Circuit include but is not limited to pressure sensor Acquisition Circuit and acceleration transducer Acquisition Circuit.

2. feedback record system is instructed in CPR pressing as described in claim 1, it is characterised in that: further include power-supply system Circuit, the power system circuit include but is not limited to charge management circuit, rechargeable battery, electric power management circuit, battery capacity Detection circuit, power-switching circuit, the power-switching circuit include but is not limited to 3.3V power circuit and 1.8V power circuit.

3. feedback record system is instructed in CPR pressing as claimed in claim 1 or 2, it is characterised in that: further include RTC electricity Road, the RTC circuit include but is not limited to RTC clock source circuit and RTC working power circuit.

4. feedback record system is instructed in CPR pressing a method according to any one of claims 1-3, it is characterised in that: the audio Processing circuit includes but is not limited to audio frequency processing circuit, playback circuit and recording circuit.

5. feedback record system is instructed in the CPR pressing as described in claim 1-4 is any, it is characterised in that: the data Storage circuit includes but is not limited to system data storage circuit and user data storage circuit.

6. feedback record system is instructed in CPR pressing a method as claimed in any one of claims 1 to 5, it is characterised in that: the communication Circuit includes but is not limited to USB communicating circuit, WIFI communication circuit and bluetooth communication circuit.

7. feedback record system is instructed in the CPR pressing as described in claim 1-6 is any, it is characterised in that: pressure sensing Device Acquisition Circuit includes signal amplifier U11, pressure sensor R67, resistance R63, resistance R64, resistance R65, resistance R66, electricity Hold C49, capacitor C50, wherein the first foot of the signal amplifier U11 is connect with resistance R63, resistance R65, capacitor C50 respectively, Its third foot is grounded after connecting with pressure sensor R67；Resistance R66 and capacitor C49 is arranged in parallel the of signal amplifier U11 Between three feet and the 4th foot；The one end resistance R64 is connect with the 4th foot of signal amplifier U11, and the other end and central processing unit connect It connects；The signal amplifier U11 is LMV321IDBVT amplifier.

8. feedback record system is instructed in CPR pressing as claimed in claim 1, it is characterised in that: the acceleration Degree sensor Acquisition Circuit includes acceleration sensor chip U1, resistance R1, capacitor C1, capacitor C2, wherein the resistance R1 One end is connect with the 6th pin and capacitor C2 of acceleration sensor chip U1 respectively, and the other end is connect with capacitor C1, acceleration Sensor chip U1 is ADXL345 digital acceleration sensor chip.

9. feedback record system is instructed in CPR pressing a method as claimed in any one of claims 1-8, it is characterised in that: the charging Battery is 503450 lighium polymer lithium ion batteries.

10. feedback record system is instructed in the CPR pressing as described in claim 1-9 is any, it is characterised in that: in described Central processor is STM32F103RCT6 processor.