CN105726014A - Portable seven-lead intelligent electrocardiosignal acquisition device - Google Patents
Portable seven-lead intelligent electrocardiosignal acquisition device Download PDFInfo
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
- A61B5/346—Analysis of electrocardiograms
- A61B5/349—Detecting specific parameters of the electrocardiograph cycle
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7203—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7225—Details of analog processing, e.g. isolation amplifier, gain or sensitivity adjustment, filtering, baseline or drift compensation
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- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7235—Details of waveform analysis
- A61B5/725—Details of waveform analysis using specific filters therefor, e.g. Kalman or adaptive filters
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
- A61B2560/02—Operational features
- A61B2560/0204—Operational features of power management
- A61B2560/0214—Operational features of power management of power generation or supply
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
- A61B2560/04—Constructional details of apparatus
- A61B2560/0431—Portable apparatus, e.g. comprising a handle or case
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Abstract
The invention provides a portable seven-lead intelligent electrocardiosignal acquisition device includes 5 shielded lead wires, an ADS1298 conversion module, an STM32F103 master control MCU module, an isolation module, a USB to serial port module, a serial port Bluetooth module, a LabVIEW upper computer electrocardiogram wave form display module, a lithium battery charging module, a lithium battery voltage conversion module and a battery electric quantity measurement module. The ADS1298 conversion module is connected with the STM32F103 master control MCU module through an SPI interface, the STM32F103 master control MCU module is in serial port communication with the USB to serial port module and the serial port Bluetooth module, the battery electric quantity measurement module is in I2C communication with the STM32F103 master control MCU module, the LabVIEW upper computer electrocardiogram wave form display module can display 7-lead electrocardiograms in real time and analyze and save the electrocardiograms. The portable seven-lead intelligent electrocardiosignal acquisition device has the advantages of being small in overall size, high in portability and accuracy, complete in design and the like and can be directly used for a household electrocardiogram machine.
Description
Technical field
The present invention relates to a kind of device gathering human ecg signal, belong to wired home field of medical device, specifically a kind of portable seven lead intelligent cardiac signal pickup assembly.
Background technology
China's heart disease and cardiovascular patient number are increasing year by year, and for many patients, its heart physiological parameter can reflect state of an illness state and therapy rehabilitation situation effectively, therefore grasp patient's electrocardiosignal parameter in time significant.But, owing to hospital of China (medical treatment) resource is nervous, many gerontal patients and white collar class are due to handicapped or work busy, it is impossible to carry out EGC parameter monitoring to hospital in time, miss the good opportunity that heart disease is prevented and treated.
Existing electrocardiosignal parameter acquisition devices major part exist expensive, power consumption is high, volume is big, the shortcoming such as not easily shifted, senile disease patient (or white collar class is in an office) at home cannot be met health is carried out self-inspection, also the electrocardiosignal of rehabilitation cannot be carried out real-time monitoring.
Summary of the invention
Present invention aims to current domestic electrocardiographicoscilloscope oscilloscope and there is the shortcomings such as not portable and volume is big, a kind of portable seven are provided to lead intelligent cardiac signal pickup assembly, electrode holder can be clipped on measured's health by easily, accurately seven cardiac diagnosis lead figure waveforms are shown on LabVIEW host computer in real time, LabVIEW host computer is also furnished with electrocardiogram preservation and some waveform analysis functions, contribute to cardiovascular patient at home EGC parameter to be guarded, provide a material reliably for the diagnosis of doctor simultaneously.
For reaching above-mentioned purpose, the present invention just has following technical scheme:
A kind of portable seven lead intelligent cardiac signal pickup assembly, conducting wire is shielded including 5 bands, ADS1298 modular converter, STM32F103 main control MCU module, isolation module, USB turns serial port module, serial ports bluetooth module, LabVIEW host computer ecg wave form display module, lithium cell charging module, lithium battery voltage modular converter, battery electric quantity measurement module；nullDescribed 5 are connected with the input of ADS1298 modular converter with shielding conducting wire，The communication ends of ADS1298 modular converter is connected with communication ends and the control end of STM32F103 main control MCU module with controlling end，The serial ports of STM32F103 main control MCU module is connected with the serial ports of isolation module and serial ports bluetooth module respectively，Isolation module turns serial port module with USB and is connected，USB turns serial port module and is connected with LabVIEW host computer ecg wave form display module，Lithium cell charging module is connected with lithium battery voltage modular converter，Battery electric quantity measurement module is connected with STM32F103 main control MCU module，Lithium battery voltage modular converter respectively with ADS1298 modular converter、Battery electric quantity measurement module、STM32F103 main control MCU module、USB turns serial port module and is connected with serial ports bluetooth module.
Preferably, described ADS1298 modular converter is made up of 24 high-precision A/D modular converter and ECG signal processing circuit module, the electrocardiosignal that every ADS1298 has the Differential Input of 8 passages to gather for input front end electrode, and built-in right leg drive amplifying circuit and Wilson's central electric terminal.ECG signal processing circuit module is made up of low-pass filter circuit and clamp circuit, the noise of extremely high frequency is simply filtered by low-pass filter circuit, the clamp circuit being made up of two diodes is possible to prevent the introducing of noise, it is to avoid the overtension or too low of signal.Here namely can be used for seven displays leading ecg wave form only with 3 passages, the reference voltage selecting AD conversion is 2.4V, and the conversion accuracy of such AD can reach 0.14uV.STM32F103 main control MCU module can configure the parameter of acquisition channel by spi bus, such as the mode of operation of PGA multiple, sample frequency etc. and configuration chip.
Preferably, described STM32F103 main control MCU module, including STM32F103 single-chip microcomputer, chip crystal oscillating circuit, reset circuit and chip power supply electric source filter circuit, STM32F103 single-chip microcomputer is 32 bit processors, operating frequency is 72MHz, and peripheral hardware enriches, and meets GPIO, SPI and the USART functional module required for system, GPIO and SPI peripheral module jointly controls ADS1298, turns serial port module or serial ports bluetooth module by USART function to USB and transmits data.
Preferably, described USB turns serial port module and selects FT232RL chip, STM32F103 single-chip microcomputer and USB turn serial port module and are actually serial communication mode, compared with USB mode communication mode relatively simple, isolation module selects ADUM1201 isolating chip, and the RXD pin of ADUM1201 receives serial ports 8 bit data frames, VBUS, D-of FT232RL chip, D+, GND pin is corresponding with the four of MicroUSB pins to be connected, and serial data can be sent to the port of PC by USB data line.Data on LabVIEW host computer constantly read port, are converted into ecg wave form electrocardiogram (ECG) data and show.
Preferably, described serial ports bluetooth module selects HM-11 bluetooth 4.0 chip, this chip integration is high, super-low standby power consumption, there is ultrafast response speed, size is 13.8*18mm only, this bluetooth module is furnished with one and connects display lamp, when being not connected with, this lamp glimmers always, when bluetooth connects, this lamp keeps normal bright state, this module is furnished with a touch key, push button when bluetooth connects and can disconnect connecting, connecting pushes button when disconnecting can restart connection by configuration information removing, the RXD pin of HM-11 bluetooth 4.0 chip receives serial ports 8 bit data frames, the port of LabVIEW host computer can be passed to by bluetooth wireless mode, this module is one of optimum selection as portable intelligent hardware device.
Preferably, lithium cell charging module selects TP4057 chip, and TP4057 is a complete single-unit charger for lithium ion battery, the both positive and negative polarity reverse connecting protection of charged pool, adopts the existing control of constant current/constant voltage.TP4057 can also be suitable for USB power source and adaptor power supplies work, including charging current watch-dog, undervoltage lockout, automatically recharge and two for indicate charging terminate and input voltage access status pin, its SOT encapsulation with less outer member number make the TP4057 ideal chose becoming portable use.
Preferably, battery electric quantity measurement module selects LTC2941 chip, its working range is very suitable for single-unit lithium ion battery, inside it, coulometer measuring device is responsible for being integrated the electric current of the detection resistor flowed through between battery positive and load calculating accurately, measure electric charge and be stored in its internal register, with I2C interface to its access and configuration.
Preferably, lithium battery voltage modular converter selects TPS73233, TPS73225 and the TPS60403 chip of TI, lithium battery voltage can be converted into 3.3V, 2.5V,-2.5V, thering is provided bipolar voltage for ADS1298, simultaneously 3.3V turns serial port module with STM32F103 main control MCU module, USB and serial ports bluetooth module is powered.
Compared with prior art, the present invention has following remarkable advantage:
nullThe present invention a kind of portable seven leads intelligent cardiac signal pickup assembly can as intelligent domestic armarium，This device volume is little、It is easy to carry、Power consumption is relatively low、Accuracy is high，Adopt four laminate mask-making technologies，The length of PCB and width respectively 4.5mm and 6mm，This device is powered and is adopted lithium battery used by usual mobile phone，And can be charged to this device by portable power source (charger baby)，Host computer can show battery electric quantity in real time，The communication mode adopted is serial communication and SPI communication，Wired USB can be selected to connect，Wireless bluetooth can also be selected to connect，LabVIEW host computer can demonstrate real-time waveform simultaneously，Waveform can preserve，Anomaly analysis can also be carried out，The AD conversion chip data processing speed that this device adopts is fast，Its sample frequency is 250SPS ~ 32kSPS，The display of 7 ecg wave forms is the real-time reflection of electrocardiosignal.
In sum, the system hardware structure of the present invention is simple, small volume, power consumption are relatively low, precision is higher, product development cycle is short, be easy to promote the use of, and is a convenience, practicality, reliable domestic intelligent electrocardiogram signal acquisition device.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of overall system of the present invention.
Fig. 2 is the ECG signal processing circuit figure of the harvester of the present invention.
Fig. 3 is that the USB in the present invention turns serial port module and isolation module circuit diagram.
Fig. 4 is the circuit diagram of the serial ports bluetooth module in the present invention.
Fig. 5 is the circuit diagram of the lithium cell charging module in the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are elaborated:
Referring to Fig. 1, a kind of portable seven lead intelligent cardiac signal pickup assembly, shield conducting wires, ADS1298 modular converter including 5 bands, STM32F103 main control MCU module, isolation module, USB turns serial port module, serial ports bluetooth module, LabVIEW host computer ecg wave form display module, lithium cell charging module, lithium battery voltage modular converter, battery electric quantity measurement module；nullDescribed 5 are connected with the input of ADS1298 modular converter with shielding conducting wire，The communication ends of ADS1298 modular converter is connected with communication ends and the control end of STM32F103 main control MCU module with controlling end，The serial ports of STM32F103 main control MCU module is connected with the serial ports of isolation module and serial ports bluetooth module respectively，Isolation module turns serial port module with USB and is connected，USB turns serial port module and is connected with LabVIEW host computer ecg wave form display module，Lithium cell charging module is connected with lithium battery voltage modular converter，Battery electric quantity measurement module is connected with STM32F103 main control MCU module，Lithium battery voltage modular converter respectively with ADS1298 modular converter、Battery electric quantity measurement module、STM32F103 main control MCU module、USB turns serial port module and is connected with serial ports bluetooth module.
Described 5 are pressed from both sides by limbs with shielding conducting wire and are connected in the left finesse of measured's health, right finesse, left foot wrist, right crus of diaphragm wrist and chest respectively, can record 7 cardiac diagnosis lead figure, it is possible to the heart physiological parameter of more detailed reaction measured；Electrocardiosignal is gathered by 24 sampling A/D chip ADS1298, ADS1298 has been internally integrated EMI filter circuit, 8 road programmable gain amplifiers, driven-right-leg circuit, Wilson's network and SPI interface, electrocardiosignal after conversion passes to STM32F103 main control MCU as output by SPI interface, and STM32F103 sends data to USB by serial port and turns serial port module or serial ports bluetooth module.
Described USB turns the USB in serial port module and turns serial port chip selection FT232RL chip, serial ports Bluetooth chip in serial ports bluetooth module selects HM-11 bluetooth 4.0 chip, and electrocardiosignal can send LabVIEW host computer ecg wave form display module to by wired and wireless two ways.
Electrocardiogram (ECG) data is carried out displacement fractionation and then data is sent by STM32F103, the electrocardiogram (ECG) data received is carried out displacement and integrates by LabVIEW host computer ecg wave form display module, thereby ensure that the original electrocardiographicdigital data that slave computer main control MCU transmits are accurate, electrocardiosignal is carried out 3 rank Butterworth low pass ripples simultaneously, removes external interfering noise.
Battery charging and discharging managing chip in lithium cell charging module selects TP4057 chip, the status pin that it includes charging current watch-dog, automatically recharges, two instruction chargings terminate and input voltage accesses；Battery electric quantity measurement module selects LTC2941 chip, measures electric charge and is stored in its internal register, with I2C interface to its access and configuration.It is that ADS1298 conversion chip is powered that described lithium battery voltage modular converter adopts TI voltage stabilizing chip to be 3.3V, 2.5V ,-2.5V bipolar voltage by 5V photovoltaic conversion, and 3.3V voltage can be STM32F103 main control MCU again simultaneously, USB turns serial port module and serial ports bluetooth module is powered.
ECG signal processing circuit as described in Figure 2 includes resistance 101, resistance 102, clamper limiter diode 103, clamper limiter diode 104, electric capacity 105 and electric capacity 106, one end of resistance 101 is connected with the outfan of the electrode with shielding line, the other end of resistance 101 is connected with one end of resistance 102 and one end of electric capacity 105, the other end of resistance 102 respectively with one end of 106 electric capacity, one end of clamper limiter diode 103, one end of clamper limiter diode 104 is connected with the input of a certain passage of ADS1298, the other end of electric capacity 105 and electric capacity 106 connects AGND end respectively, another termination AVDD end of clamper limiter diode 103, another termination AVSS end of clamper limiter diode 104.
nullUSB as described in Figure 3 turns serial port module and isolation module includes isolating chip 201、USB turns serial port chip 202、LED light 203、LED light 204、Current-limiting resistance 205、Current-limiting resistance 206、Filter capacitor 207、Filter capacitor 208 and filter capacitor 209，No. 1 pin of isolating chip 201 connects 3.3V end、No. 2 pins connect TXD end、No. 3 pins connect RXD end、No. four pins connect GND end、No. 5 pins connect VGND end、No. 5 pins that No. 6 pins turn serial port chip 202 with USB are connected、No. 1 pin that No. 7 pins turn serial port chip 202 with USB is connected、No. 8 pins are connected with VBUS end，USB turns No. 4 pins of serial port chip 202 and connects VBUS end、No. 7 pins connect VGND end、No. 15 pins connect D+ end、No. 16 pins connect D-end、No. 18 pins connect VGND end、No. 21 pins connect VGND end、No. 25 and No. 26 pins connect VGND end，One termination USB of LED light 203 and LED light 204 turns No. 17 pins of serial port chip 202，One end of one termination current-limiting resistance 205 of LED light 203，Another termination USB of current-limiting resistance 205 turns No. 23 pins of serial port chip 202，One end of another termination current-limiting resistance 206 of LED light 204，Another termination USB of current-limiting resistance 206 turns No. 22 pins of serial core sheet 202，One termination VBUS end of filter capacitor 207 and filter capacitor 208，Another termination VGND end of filter capacitor 207 and filter capacitor 208，One termination USB of filter capacitor 209 turns 17 pins of serial port chip 202，Another termination VGND end of filter capacitor 209.
nullSerial ports bluetooth module as described in Figure 4 includes serial ports Bluetooth chip 301、Electric capacity 302、Resistance 303、Touch key 304、Current-limiting resistance 305、LED bluetooth display lamp 306 and filter capacitor 307，No. 2 pins of serial ports Bluetooth chip 301 connect TXD end、No. 4 pins connect RXD end、No. 9 pins connect 3.3V end、No. 12 pins connect GND end，No. 16 pins of one termination serial ports Bluetooth chip 301 of electric capacity 302，Another terminates GND end，No. 16 pins of one termination serial ports Bluetooth chip 301 of resistance 303，One end of another termination touch key 304 of resistance 303，Another termination 3.3V end of touch key 304，No. 15 pins of one termination serial ports Bluetooth chip 301 of current-limiting resistance 305，One end of another termination LED bluetooth display lamp 306 of current-limiting resistance 305，Another termination GND end of LED bluetooth display lamp 306，One termination GND end of filter capacitor 307，Another termination 3.3V end of filter capacitor 307.
nullLithium cell charging management module as described in Figure 5 includes current-limiting resistance 401、Filter capacitor 402、Diode 403、Switch key 404、Diode 405、Lithium battery socket 406、Filter capacitor 407、Resistance 408、Management of charging and discharging chip 409、Discharge and recharge indication LED lamp 410、Discharge and recharge indication LED lamp 411，No. 4 pins of management of charging and discharging chip 409 connect USB5V end，No. 3 pins of management of charging and discharging chip 409 connect one end of diode 405 and one end of lithium battery socket，No. 2 pins of management of charging and discharging chip 409 connect GND end，One end of one termination filter capacitor 402 of resistance 401，Another termination discharge and recharge indication LED lamp 410 of resistance 401 and one end of discharge and recharge indication LED lamp 411，Another termination GND end of filter capacitor 402，One termination USB5V end of diode 403，Another termination switch key 404 of diode 403 and one end of diode 405，Another termination VCC end of switch key 404，No. 3 pins of one termination management of charging and discharging chip 409 of filter capacitor 407、One end of lithium battery socket and one end of diode 405，No. 6 pins of one termination management of charging and discharging chip 409 of resistance 408，Another termination GND end of resistance 408，No. 1 pin of another termination management of charging and discharging chip 409 of discharge and recharge indication LED lamp 410，No. 5 pins of another termination management of charging and discharging chip 409 of discharge and recharge indication LED lamp 411.
nullNative system specific works process is as follows: after start，ADS1298 modular converter、STM32F103 main control MCU module initializes respectively，The electrode holder connecting 5 conducting wires with shielding obtains the faint limbs signal of telecommunication 3 passages by ADS1298，STM32F103MCU is transferred data to by SPI interface after the ADS1298 converted amplification of chip internal signal，Battery electric quantity measurement module sends battery electric quantity to STM32F103MCU by I2C interface，Inside STM32F103, the data that SPI interface transmits are split，Transfer data to USB again through serial ports and turn serial port module or serial ports bluetooth module，The port being transmitted to LabVIEW host computer waveform display module that USB turns serial port module or serial ports is received by serial ports bluetooth module data are complete，The data received are combined by PC end LabVIEW program，Form original complete data，At the Butterworth filter through 3 rank, ecg wave form is shown in real time.
Claims (8)
1. the one kind portable seven intelligent cardiac signal pickup assembly that leads, it is characterized in that, shield conducting wire, ADS1298 modular converter including 5 bands, STM32F103 main control MCU module, isolation module, USB turns serial port module, serial ports bluetooth module, LabVIEW host computer ecg wave form display module, lithium cell charging module, lithium battery voltage modular converter, battery electric quantity measurement module；nullDescribed 5 are connected with the input of ADS1298 modular converter with shielding conducting wire，The communication ends of ADS1298 modular converter is connected with communication ends and the control end of STM32F103 main control MCU module with controlling end，The serial ports of STM32F103 main control MCU module is connected with the serial ports of isolation module and serial ports bluetooth module respectively，Isolation module turns serial port module with USB and is connected，USB turns serial port module and is connected with LabVIEW host computer ecg wave form display module，Lithium cell charging module is connected with lithium battery voltage modular converter，Battery electric quantity measurement module is connected with STM32F103 main control MCU module，Lithium battery voltage modular converter respectively with ADS1298 modular converter、Battery electric quantity measurement module、STM32F103 main control MCU module、USB turns serial port module and is connected with serial ports bluetooth module.
2. according to claim 1 portable seven lead intelligent cardiac signal pickup assembly, it is characterized in that, described ADS1298 modular converter is made up of 24 high-precision A/D modular converter and ECG signal processing circuit module, the electrocardiosignal that every ADS1298 has the Differential Input of 8 passages to gather for input front end electrode, and built-in right leg drive amplifying circuit and Wilson's central electric terminal；ECG signal processing circuit module is made up of low-pass filter circuit and clamp circuit, the noise of extremely high frequency is simply filtered by low-pass filter circuit, the clamp circuit being made up of two diodes is prevented from the introducing of noise, it is to avoid the overtension or too low of signal；Namely can be used in seven displays leading ecg wave form only with 3 passages, the reference voltage selecting AD conversion is 2.4V, and the conversion accuracy of such AD reaches 0.14uV, the STM32F103 main control MCU module parameter by spi bus configuration acquisition channel.
3. according to claim 1 portable seven lead intelligent cardiac signal pickup assembly, it is characterized in that, described STM32F103 main control MCU module includes STM32F103 single-chip microcomputer, chip crystal oscillating circuit, reset circuit and chip power supply electric source filter circuit, STM32F103 single-chip microcomputer is 32 bit processors, operating frequency is 72MHz, peripheral hardware enriches, meet GPIO, SPI and the USART functional module required for system, GPIO and SPI peripheral module jointly controls ADS1298, turns serial port module or serial ports bluetooth module by USART function to USB and transmits data.
4. according to claim 1 portable seven lead intelligent cardiac signal pickup assembly, it is characterised in that described USB turns serial port module and selects FT232RL chip, and it is serial communication mode that STM32F103 single-chip microcomputer and USB turn serial port module；Isolation module selects ADUM1201 isolating chip, the RXD pin of ADUM1201 receives serial ports 8 bit data frames, VBUS, D-of FT232RL chip, D+, GND pin is corresponding with the four of MicroUSB pins to be connected, by USB data line, serial data is sent to the port of PC, the data on LabVIEW host computer constantly read port, electrocardiogram (ECG) data is converted into ecg wave form and shows.
5. according to claim 1 portable seven lead intelligent cardiac signal pickup assembly, it is characterized in that, described serial ports bluetooth module selects HM-11 bluetooth 4.0 chip, this bluetooth module is furnished with one and connects display lamp, when being not connected with, this lamp glimmers always, when bluetooth connects, this lamp keeps normal bright state, this module is furnished with a touch key, push button when bluetooth connects and connection is disconnected, connecting pushes button when disconnecting to remove configuration information restarts connection, the RXD pin of HM-11 bluetooth 4.0 chip receives serial ports 8 bit data frames, the port of LabVIEW host computer is passed to by bluetooth wireless mode.
6. according to claim 1 portable seven lead intelligent cardiac signal pickup assembly; it is characterized in that; described lithium cell charging module selects TP4057 chip; TP4057 is a complete single-unit charger for lithium ion battery; the both positive and negative polarity reverse connecting protection of charged pool; adopt the existing control of constant current/constant voltage; TP4057 also be able to be suitable for USB power source and adaptor power supplies work, including charging current watch-dog, undervoltage lockout, automatically recharge and two for indicate charging terminate and input voltage access status pin.
7. according to claim 1 portable seven lead intelligent cardiac signal pickup assembly, it is characterized in that, described battery electric quantity measurement module selects LTC2941 chip, inside it, coulometer measuring device is responsible for being integrated the electric current of the detection resistor flowed through between battery positive and load calculating accurately, measure electric charge and be stored in its internal register, with I2C interface to its access and configuration.
8. according to claim 1 portable seven lead intelligent cardiac signal pickup assembly, it is characterized in that, described lithium battery voltage modular converter selects TPS73233, TPS73225 and the TPS60403 chip of TI, lithium battery voltage is converted into 3.3V, 2.5V,-2.5V, provides bipolar voltage for ADS1298, and simultaneously 3.3V is again for turning serial port module with STM32F103 main control MCU module, USB and serial ports bluetooth module is powered.
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| CN110702194A (en) * | 2019-07-29 | 2020-01-17 | 辽宁维森信息技术股份有限公司 | High-speed weighing controller with automatic compensation function and control method |
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| CN110702194A (en) * | 2019-07-29 | 2020-01-17 | 辽宁维森信息技术股份有限公司 | High-speed weighing controller with automatic compensation function and control method |
| CN111513687A (en) * | 2020-04-10 | 2020-08-11 | 北京科技大学 | Human body hypoxia injury monitoring and early warning bracelet and human body hypoxia injury monitoring and early warning method |
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Application publication date: 20160706 |