Solution on Portable Blood Pressure Monitor System
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An Brief study on Blood Pressure Monitor system from Freescale
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Solution on Portable Blood Pressure Monitor System
- 1. Solution on Portable Blood Pressure Monitor System
- 3. System Architecture of Blood Pressure Monitor System Battery Management cuff Pressure Transducer Pressure Sensor MCU USER Interface LCD Control and Backlighting Bandpass filter / Amp Alarm USB Interface Supervisory and Watchdog
- 4. Blood Pressure Monitor Block Diagram Hardware Architecture of BPM System
- 5. Blood Pressure Monitor Application Heartbeat Signal Heartbeat Over Time
- 8. MCF51QE Family Block Diagram MCF51QE128 Series Block Diagram
- 11. 8/16 bit Low Power MCU Selection Guide Manufacturer Part Number Farnell # Newark # Frequency (MHz) LCD Segments RAM (KB) Flash (KB) GPIOs ADC Resolution Power (Active Mode) Interface TI MSP430FG4616 Link Link 8 160 4 92 80 12-bit SAR 3.2mA IIC/Uart/SPI TI MSP430FG4617 Link Link 8 160 8 92 80 12-bit SAR 3.2mA IIC/Uart/SPI TI MSP430FG4618 Link Link 8 160 8 116 80 12-bit SAR 3.2mA IIC/Uart/SPI Freescale MC9S08LL16 Link Link 20 4*28/8*24 2 16 38 12-bit 0.5mA-5.7mA SPI/IIC/SCI Freescale MC9S08LL8 Link 20 4*28/8*24 2 8 38 12-bit 0.5mA-5.7mA SPI/IIC/SCI Microchip PIC16F727 Link Link 5MIPS N/A 0.37 14 36 8-bit 110uA/MHz IIC/Uart/SPI Microchip PIC18LF14K50 Link Link 12MIPS N/A 0.77 16 14 10-bit 170uA/MHz USB/IIC/Uart/SPI Microchip PIC24F04KA201 Link Link 12MIPS N/A 0.51 4 18 10-bit 195uA/MHz IIC/Uart/SPI Microchip PIC24F16KA102 Link Link 16MIPS N/A 1.54 16 24 10-bit 195uA/MHz IIC/Uart/SPI Atmel ATMEGA3290P Link Link 20 4*40 2 32 69 10-bit 420uA/MHz Uart/SPI Atmel ATMEGA169P Link Link 16 4*25 1 16 54 10-bit 330uA/MHz Uart/SPI Cypress CY8C29866 Link Link 24 N/A 2 32 64 14-bit 14mA IIC/Uart/SPI Cypress CY8C29666 Link Link 24 N/A 2 32 44 14-bit 14mA IIC/Uart/SPI Analog Device ADUC7020 Link Link 44 N/A 8 62 40 12-bit 11mA IIC/Uart/SPI Analog Device ADUC7024 Link Link 44 N/A 8 62 40 12-bit 11mA IIC/Uart/SPI
- 12. Precision Instrumentation Amplifier Selection Guide Manufacturer Part Number Farnell # Newark # Offset Voltage Bias Current Noise CMRR Texas Instruments INA333 1645386 01P0907 20uV 200pA 50nV/ √ Hz 100dB Texas Instruments OPA333 1230456 80K2657 10μV ±70pA 1.1μV/ √ Hz 106dB Texas Instruments INA321 1206911 74C9868 ±200μV 10pA 100 nV/ √ Hz 90dB National Semiconductor LMP7731 1433181 50M8797 500 µV ±1.5 nA 3.3 nV/ √ Hz 105dB National Semiconductor LMP2231 1552445 84M8072 150 µV 20 fA 60 nV/ √ Hz 81dB National Semiconductor LMP2015 1542530 75M6030 50 µV N/A 35 nV/ √ Hz 100dB National Semiconductor LMP7701 1312606 69K2293 200 µV ±200 fA 9 nV/ √ Hz 88dB Maxim MAX4194 1379965 23K5961 50μV 20nA 85 nV/ √ Hz 99dB Maxim MAX4195 53K6818 50μV 20nA 85 nV/ √ Hz 99dB Maxim MAX4196 53K6820 50μV 20nA 85 nV/ √ Hz 99dB Maxim MAX4208 1593369 54M6982 20uV 1pA 140 nV/ √ Hz 135dB Maxim MAX4209 1550519 54M6984 20uV 1pA 140 nV/ √ Hz 135dB Analog Device AD8099 8397848 19M0932 N/A N/A 0.95nV/rtHz N/A Analog Device ADA4899 1274191 19M0651 N/A N/A 1nV/rtHz N/A Analog Device ADA4841-1 1543853 59K0892 N/A N/A 2.1nV/rtHz N/A Analog Device AD8021 1651289 19M8871 N/A N/A 2.1nV/rtHz N/A
- 13. Pressure Sensor for Blood Pressure Monitor Manufacturer Part Number Farnell # Newark # Pressure Range Sensitivity Pressure Type Voltage (V) Current (mA) Freescale MPX2300DT1 1457142 66F7152 0 - 300mm Hg 5uV / V / mmHg Differential 6 1 Freescale MPX2301DT1 1380583 75C3939 0 - 300mm Hg 5uV / V / mmHg Differential 6 1 Freescale MPXM2053GS 4777050 25C4136 0- 50kPa/7.25psi 0.8 Gauge 10 6 Freescale MP3V5050DP 09P4195 0- 50kPa/7.25psi 54mV / kPa Differential 3 7 Honeywell 1805-01A-L0L-B 0 - 5psi N/A Absolute N/A 2 Honeywell 1805-01D-L4L-B 0 - 5psi N/A Absolute N/A 2 Honeywell 1805-01G-L0L-B 0 - 5psi N/A Absolute N/A 2 Honeywell 1805-01G-L0N-B 0 - 5psi N/A Absolute N/A 2 Honeywell 1805-01G-L1L-B 0 - 5psi N/A Absolute N/A 2 Omron D8M-R 0 - 280mm Hg N/A N/A 5 10
- 14. Evaluation Kits Details Manufacturer Product Type Evaluation Kits Title EVKs Part Number URL Part Number Texas Instruments MCU MSP430FG4618/F2013 Experimenter Board MSP-EXP430FG4618 Link MSP430FG4618 Texas Instruments ADC ADS1115 Performance Demonstration Kit ADS1115EVM-PDK Link ADS1115 Freescale MCU S08LL Demonstration Board DEMO9S08LL16 Link MC9S08LL16 Freescale MCU TWR-S08LL64 Tower System 8-bit Segment LCD Module TWR-S08LL64-KIT Link MC9S08LL64 Freescale MCU MCF51QE128 Evaluation Board EVBQE128 Link MCF51QE128 Freescale MCU MCF51QE128 Demonstration Board DEMOQE128 Link MCF51QE128 Freescale MCU QE32 Demonstration board DEMOQE32 Link QE32 Freescale MCU QE8 Demonstration board DEMOQE8 Link QE8 Microchip MCU MPLAB Starter Kit for PIC18F MCU DM180021 Link PIC18F Microchip MCU PIC18 Explorer Board DV164136 Link PIC18F Microchip MCU Explorer 16 Development Board DM240001 Link PIC24F Microchip MCU Explorer 16 Starter Kit DV164033 Link PIC24F Microchip MCU MPLAB Starter Kit for PIC24F DM240011 Link PIC24F Microchip MCU XLP 16-bit Development Board DM240311 Link PIC24F16KA102 Analog Device Amplifier AD8099 Evaluation Boards Link AD8099 Analog Device Amplifier Evaluation Board for the AD7273/AD7274 3 MSPS, 10-/12-Bit ADCs Data Sheet EVAL-AD7273/AD7274 Link AD7273/AD7274 Analog Device Amplifier Controller for Precision Converter Evaluation/Demonstration Boards EVAL-AD7xxxCB Link AD7276
- 15. Peripheral Solutions for Blood Pressure Monitor Product Type Farnell Newark 12/14/16 Bit ADC Click Here Click Here Instrumentation Amplifier Click Here Click Here LCD Controller Click Here Click Here Power Management Click Here Click Here Battery Management Click Here Click Here
Editor's Notes
- Welcome to the Application solution on Portable Blood Pressure Monitor System , we discuss about system architecture of the Blood pressure monitor solution from Freescale, and discuss about working principle and its peripherals involved in this solution.
- A blood pressure monitor is a device used to measure arterial pressure as blood is pumped away from the heart. Blood pressure monitors can use Korotkoff, Oscillometry, or Pulse Transit Time methods to measure blood pressure. They employ a pressure cuff, pump, and transducer to measure blood pressure and heart rate in three phases: Inflation, Measurement, and Deflation. They include an LCD, selection buttons, memory recall, power management, and USB interface. The pressure transducer produces the output voltage proportional to the applied differential input pressure. The output voltages of the pressure transducer range from 0 to 40 mV, which need to be amplified so that the output voltage of the DC amplifier has a range from 0 to 5V. Thus, we need a high-gain amplifier. The digital measurements of pressure and heart rate are performed by the microprocessor. Measurements results are stored in EEPROM or FLASH memory as a data log that can be uploaded to a PC via USB
- Typically, from a user perspective, the monitor includes an inflatable cuff to restrict blood flow and a manometer (pressure meter) to measure the blood pressure. From a system designer´s perspective a blood pressure monitor is more complex. It consists of a power supply, motor, memory, pressure sensor and user interfaces, which can include a display, keypad or touchpad and audio, as well as optional USB or ZigBee communications interfaces. Blood pressure varies between systolic (SBP) and diastolic (DBP). Systolic is the peak pressure in the arteries, which occurs near the beginning of the cardiac cycle when the ventricles are contracting. Diastolic is minimum pressure in the arteries, which occurs near the end of the cardiac cycle when the ventricles are filled with blood. The new Flexis devices enable hardware developers to develop one hardware platform for several projects, and place in a separate bill of materials the parts for designs that require higher integration,
- you can see slight variations in the overall pressure on the cuff While deflating a cuff that is attached to a person’s arm. This variation in the pressure on the cuff is actually due to the pressure change from blood circulation. This variation is amplified through a high-pass filter designed at 1 Hz, and set to an offset. This new signal is the heartbeat signal. The other signal shows variations on the pressure signal and is a graphical representation of a patient’s heartbeat over time.
- Using the heartbeat detection, a simple oscillometric method is used to determine systolic blood pressure (SBP) and diastolic blood pressure (DBP). The simplified measurement is based on the idea that the amplitude of the heartbeat signal changes as the cuff is inflated over the SBP While the cuff is deflated, the amplitude of the heartbeat signal grows as the cuff pressure passes the systolic pressure on the patient. As the cuff pressure is further reduced, the pulsations increase in amplitude, until it reaches a maximum pulse known as the mean arterial pressure (MAP), and then reduces rapidly until the diastolic pressure is reached
- Portable blood pressure monitors help in the early diagnosis and control of hypertension by allowing patients to cost–effectively run tests and measurements at their own homes without having to visit a physician. This page gives features of Blood pressure monitor system using Flexis QE128 family devices. The Blood Pressure Monitor reference design demonstrates how the sensing, data communication and processing capabilities of Freescale products interact to create a complete medical handheld solution. This design Enabled to use both the 8-bit MC9S08QE128 and 32-bit MCF51QE128, both members of the pin, peripheral and tool-compatible Flexis QE128 Family, Freescale provides intelligence to medical solutions providing freedom across the performance spectrum.
- The QE family, comprised of a pin-compatible 8-bit and 32-bit device duo, is the first family in the Flexis series. The FlexisTM series of controllers is the connection point on the Freescale Controller Continuum, where 8- and 32-bit compatibility becomes reality. The MCF51QE128 device extends the low end of the 32-bit ColdFire controller family with up to 128 KB flash memory and a 24-channel, 12-bit analog-to-digital converter (ADC). The 32-bit MCF51QE128 is pin-, peripheral- and tool-compatible with the 8-bit S08QE128 device. They share a common set of peripherals and development tools delivering the ultimate in migration flexibility
- This Page gives features about MCF51QE devices, pointing out the 25MHz bus speed, it has upto 128KB flash, 8KB of RAM, it has 70 GPIO ports.
- DEMOQE128 is a cost-effective board targeting quick microcontroller evaluation. The board includes two plug-in daughter cards to highlight the ease of migration between the Flexis™ QE128, 8-bit S08 and 32-bit ColdFire V1® microcontrollers. The board also includes a power terminal to measure the ultra-low power consumption of the Flexis QE128 devices. The DEMOQE128 board also has the capability of implementing a virtual serial port on the PC. This allows the PC to send and receive serial data via the serial communication pins of P&E’s Embedded Multilink design.
- Here are some of the 8/16 bit Low Power MCU Selection Guide for this solution
- Here we list Premier Farnell linecard for Precision Instrumentation Amplifier
- Here we list Premier Farnell linecard for Pressure Sensor for Blood Pressure Monitor
- This page gives information about different Evaluation kits available for Blood Pressure monitoring system.
- Here Peripherals required for Blood pressure monitor system are shown, it requires ADC, Instrumentation amplifier, LCD Pannels, Lcd Controller, Power management and controller, Battery management, USB driver..Etc.
- Thank you for taking the time to view this presentation on “ Portable Blood Pressure monitor system ”. If you would like to learn more or go on to purchase some of these devices, you may either click on the part list link, or simply call our sales hotline. For more technical information you may either visit the element14 site, or if you would prefer to speak to someone live, please call our hotline number, or even use our ‘live chat’ online facility. You may visit Element 14 e-community to post your questions.