ARM-based platform and GPRS mobile network hardware ECG Development _4403

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ARM-based platform and GPRS mobile network hardware ECG Development
 
 
. Interface ESD protection greater than 1500V. Dual power supply 5V power supply, power consumption is less than 20mA. ECG signal amplitude 0mV - 4mV, by the introduction of ECG lead wire interface. Using buffered right leg drive signal, and use GUARD technology, such as common mode noise suppression. After entered the buffer stage input protection, access to the differential amplifier, amplified four times, the signal range 0mV ~ 16mV. Signal into the high-pass,You are not allowed to view links. Register or Login, low pass active filter consisting of 2-order band-pass filter, 0.03Hz-130Hz, and then amplified by the level of 20 times, hit 24 indole Association engraved into the school 220f ~ 73H4 0mV ~ 320mV signal amplitude . The 50Hz and 35Hz notch filter after the signal amplification of 10 times. Thick whole level - the amount of BU to the previous lemma Heart 1 / 2 slow delivery Am I-specific analog converter dedicated digital power supply dual power supply 33V 5V supply level decoupling circuit with Q Ma, the bypass capacitor ring I rub block mining share schematic Fig1CircuitdiagramorIh ~ samplingmodule1.2A / D conversion control control D conversion,You are not allowed to view links. Register or Login, extract outcome data, arrest data to the main roots of a A / D converter chip: LTCl860: Conversion time: Minimum 5s; fetching time:】 2 SCK: total cycle : 5s +】 2 SCK: sampling rate: 【kHz; Resolution: 12; data and control interface: A 2-wire SPI interface, the system still export the data conversion and processing module c41 task: completion of various orders issued by the host, including under the Some modules (5) Real-time clock modules: start signals generated AiD f6) AfD modules: the module from the start,You are not allowed to view links. Register or Login, the sampling time off,You are not allowed to view links. Register or Login, take the number of modules completed ashamed l do. (7) Start the module: Set mining paradox rate, signs, sample timer interrupt, ( sampling time l1-off: According to the sampling rate start A. ID Converter (9) to take a few touch blocks: data buffering, handling some samples,You are not allowed to view links. Register or Login, send data line 'Zhu [three three vertical Robinson ulterior ulterior ulterior l: CONV2: SDO3: GND4: SCKSCK: <8MHz control protocol: SPI Conference, 4 (high word), 8 c generous byte 1, the second frame to obtain data hiding hardware features a number of laps of 21.3 microprocessor processor 2051 firmware. Its function is as follows: f1J yards before initialization of module power I asked. Set FOLq, real-time clock timer, and the host to access (2) The main loop module: check mark, according to the marks transferred to the command processing module and task processing module, or through the king f: re-query (3) The touch command processing blocks: according to the priority order to deal with a variety of host command sets the system should turn solid 【flag f_:,!! I ~---- plant rJ-limonene - meaning I asked for a power save hide chrome spring 1 --- twenty-two =-- I + {District Witch 』: Pu Chen of three to draw back to turn back to the prince Yu 2 each acquisition hardware block diagram of g. 2BlockdiagramofIhesamplinghardware Figure 3 Wireless Transmitter Circuit Circuit Fig. 3Circuildiagramc ● ftheradiomodulelI1J classes around 4 wireless radio front-end record r soap Figure Fig4RecordedECG0ranteriorradioedmodule (】 0) Data Management Module: slow towel data, data with fr pretreatment (removal of exotic, filtering, etc.) 1.4 wireless wireless transmission module plate Radio modules GPRSG20B circuit l3) 2 results in Figure 5 the king line receiver to receive the ECG solid Fig. 5receivedECGnfradinedmodule remove 5OHzT enforcement, clear waveform with the launch the number of c Ill spoon ECG shown in Figure 5)