CN202036203U - Multifunctional medical signal generation and measurement instrument based on STM32 - Google Patents
Multifunctional medical signal generation and measurement instrument based on STM32 Download PDFInfo
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- CN202036203U CN202036203U CN2011200973084U CN201120097308U CN202036203U CN 202036203 U CN202036203 U CN 202036203U CN 2011200973084 U CN2011200973084 U CN 2011200973084U CN 201120097308 U CN201120097308 U CN 201120097308U CN 202036203 U CN202036203 U CN 202036203U
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Abstract
The utility model relates to medical signal generation and measurement equipment, in particular to a multifunctional medical signal generation and measurement instrument based on STM32, which comprises a single chip microcomputer control unit, a bi-channel numerical control conventional signal generation unit, a filtering processing unit, a signal selection unit, a signal amplitude adjusting unit, a power amplifying unit, a signal output interface, a numerical control amplitude adjusting unit, an LCD (liquid crystal display) displaying unit, a key unit, a signal input interface, a signal amplitude numerical control adjusting unit, a USB (universal serial bus) interface and a storage unit. By utilizing the 32-bit single chip microcomputer to control and generate conventional normal and abnormal physiological signals, conventional bi-channel sinusoidal signals with high-precision frequencies and phase differences, triangular wave signals and square wave signals, and combined with the USB interface and an LCD, the multifunctional medical signal generation and measurement instrument has quite strong load capacity of output, thereby being utilized for maintenance of medical instruments, experiments, teaching and scientific research of colleges and universities, and particularly for measurement of human ear features and human body impedance. In addition, wave forms of the physiological signals can be changed through the USB interface, so that fine openness is achieved.
Description
Technical field
This utility model relates to a kind of equipment of generation and measurement thereof of medical signal, and especially a kind of multifunctional medical signal based on STM32 produces and measuring instrument.
Background technology
In clinical, medical research and experiment, need detect, measure and analyze physiological signal; In research, maintenance or the debugging of armarium and other medical equipment, often need standard or unusual physiological signals such as input analog electrocardiogram, brain electricity; Medically, in people's ear frequency characteristic and human body impedance The Characteristic Study and teaching, need high freuqency accuracy, high driving ability, highly purified sinusoidal signal, this much existing signal generator can't meet the demands at all; A lot of medical signals generators or signal generator have only the common physiological signal of generation, and its waveform generally is fixed, do not have to produce, to export normal and abnormal physiology signal commonly used, and sinusoidal, trigonometric sum square-wave signal, and can simultaneously-measured equipment.
Summary of the invention
The purpose of this utility model is to overcoming the deficiencies in the prior art, provide a kind of multifunctional medical signal to produce and measuring instrument based on STM32, utilize Single-chip Controlling to produce sine, triangular wave and the square-wave signal of normal and abnormal physiology signal commonly used, high accuracy frequency commonly used, its output has very strong carrying load ability, and the waveform of its physiological signal can change by USB interface, also can measure the multi-path physiology signal simultaneously, and utilize the LCD display waveform.
This utility model is for overcoming the deficiencies in the prior art, adopted following technical scheme: a kind of multifunctional medical signal based on STM32 produces and measuring instrument, it is characterized in that: include Single-chip Controlling unit, two pass numerical control convectional signals generation unit, filter processing unit, signal selected cell, signal amplitude regulon, power amplification unit, signal output interface, numerical control amplitude adjusted unit, LCD display unit, pushbutton unit, signal input interface, signal amplitude numerical control regulon, USB interface and memory element; There are D/A conversion, A/D conversion, USB engine in inside, Single-chip Controlling unit; The unitary control output end of Single-chip Controlling mouth is connected with the input of two pass numerical control convectional signals generation unit, and its outfan is connected with the input of signal selected cell; The input of filter processing unit is connected with the D/A conversion output port of inside, Single-chip Controlling unit, and its outfan is connected with the input of signal selected cell; The outfan of signal selected cell is connected with signal amplitude regulon input, the control input end of signal amplitude regulon is connected with the input of Single-chip Controlling unit controls outfan and power amplification unit respectively with outfan, the outfan of power amplification unit is connected with numerical control amplitude adjusted unit input with signal output interface, and numerical control amplitude adjusted unit outfan is connected with the A/D conversion input port of inside, Single-chip Controlling unit; The outfan of signal input interface is connected with the input of signal amplitude numerical control regulon, and the outfan of signal amplitude numerical control regulon is connected with the unitary input/output port of Single-chip Controlling; The outfan of the input/output interface of memory element, the input/output interface of USB interface and button input block is connected with the unitary input/output interface of Single-chip Controlling, USB engine and signal input part respectively.
The multifunctional medical signal based on STM32 that provides by this utility model produces and measuring instrument, utilize 32 Single-chip Controlling to produce sine, triangular wave and the square-wave signal of normal and abnormal physiology signal commonly used, high accuracy frequency commonly used, its output has maintenance, the experiment in the institution of higher learning, the teaching and scientific research that very strong carrying load ability can be used as medical instrument, especially the measurement of people's ear characteristic in the medical science and human body impedance characteristic, the waveform of its physiological signal can change by USB interface.
This utility model has following advantage:
(1) LCD lcd technology and control and 32 powerful technology such as high-performance single-chip microcomputer of processing capacity of USB interface technology, intuitive display are extremely easily used in the utilization of this instrument, this makes this intelligence instrument stable performance, reliable, have simultaneously volume little, use directly perceived, convenient, flexibly, be easy to carry, characteristics such as cost is low.
(2) this instrument can be realized communicating by letter of computer and single-chip microcomputer by USB interface, increase at any time, the various simulation physiological signal that produces of needing, and can provide several frequencies same physiological signal, with convenient with general oscillograph observation.This makes this instrument have good opening.
(3) this instrument utilizes the output of its high driving ability, can directly drive measurement, experiment and research that earphone is used for people's ear frequency characteristic, also utilize its sinusoidal signal that can export high freuqency accuracy, high-purity, high driving ability, can extremely be advantageously used in human body impedance The Characteristic Study and teaching etc.
(4) this instrument can be measured nearly 8 road physiology signals simultaneously, and utilizes LCD to show its respective waveforms, can realize the transmission of data etc. by USB interface and computer realization communication.
Description of drawings
This utility model said structure can further specify by the indefiniteness embodiment that accompanying drawing provided.
Fig. 1 is a schematic block circuit diagram of the present utility model;
Fig. 2 is the unitary circuit diagram of Single-chip Controlling;
Fig. 3 is the circuit diagram of two pass numerical control convectional signals generation unit;
Fig. 4 is the circuit diagram of filter processing unit;
The circuit diagram of Fig. 5 signal selected cell;
Fig. 6 is the circuit diagram of signal amplitude regulon;
Fig. 7 is the circuit diagram of power amplification unit;
Fig. 8 is the unitary circuit diagram of numerical control amplitude adjusted;
Fig. 9 is the circuit diagram of LCD display unit;
Figure 10 is the circuit diagram of memory element;
Figure 11 is the circuit diagram of signal amplitude numerical control regulon.
The specific embodiment
Embodiment of the present utility model is described with reference to the accompanying drawings.In the embodiment depicted in fig. 1, a kind of multifunctional medical signal based on STM32 produces and measuring instrument, includes Single-chip Controlling unit, two pass numerical control convectional signals generation unit, filter processing unit, signal selected cell, signal amplitude regulon, power amplification unit, signal output interface, numerical control amplitude adjusted unit, LCD display unit, pushbutton unit, signal input interface, signal amplitude numerical control regulon, USB interface and memory element; There are D/A conversion, A/D conversion, USB engine in inside, Single-chip Controlling unit; The unitary control output end of Single-chip Controlling mouth is connected with the input of two pass numerical control convectional signals generation unit, and its outfan is connected with the input of signal selected cell; The input of filter processing unit is connected with the D/A conversion output port of inside, Single-chip Controlling unit, and its outfan is connected with the input of signal selected cell; The outfan of signal selected cell is connected with signal amplitude regulon input, the control input end of signal amplitude regulon is connected with the input of Single-chip Controlling unit controls outfan and power amplification unit respectively with outfan, the outfan of power amplification unit is connected with numerical control amplitude adjusted unit input with signal output interface, and numerical control amplitude adjusted unit outfan is connected with the A/D conversion input port of inside, Single-chip Controlling unit; The outfan of signal input interface is connected with the input of signal amplitude numerical control regulon, and the outfan of signal amplitude numerical control regulon is connected with the unitary input/output port of Single-chip Controlling; The outfan of the input/output interface of memory element, the input/output interface of USB interface and button input block is connected with the unitary input/output interface of Single-chip Controlling, USB engine and signal input part respectively.
Aforementioned Single-chip Controlling unit comprises single-chip microcomputer U1 and corresponding peripheral component, and single-chip microcomputer U1 adopts 32 single-chip microcomputer STM32F103RD, and there are D/A conversion, A/D conversion, USB engine in inside; The analogue signal input and output PA mouth of single-chip microcomputer U1 is connected with input/output port in numerical control amplitude adjusted unit, signal amplitude regulon, the signal amplitude numerical control regulon respectively; Single-chip microcomputer D/A delivery outlet, PWM delivery outlet, USB engine respectively with filter processing unit in physiological signal input, filtering pulse link to each other with USB interface; Single-chip microcomputer input and output PC mouth is connected with input port in signal selected cell, button input block, the two pass numerical control convectional signals generation unit respectively, and single-chip microcomputer input and output PB mouth is connected with input/output port in memory element, the LCD display unit respectively.Among the embodiment as shown in Figure 2,32 single-chip microcomputer STM32F103RD that single-chip microcomputer U1 adopts, its inside has D/A conversion, A/D conversion, USB engine, can make things convenient for and compunication, simultaneously to analyzing by button inputted information, and send corresponding data or control signal to other parts, realize from the audio signal of outfan output relevant parameter, and control LCD liquid crystal is realized the demonstration of various relevant informations.Single-chip simulation signal input node Peak_MeasureADC, input/output port PeakCtrlA1 link to each other with simulation output, control input in the numerical control amplitude adjusted unit respectively; Single-chip microcomputer D/A delivery outlet Node B ioSign1, BioSign2, PWM delivery outlet node M AX291_CLK1, MAX291_CLK2 link to each other with physiological signal input, filtering pulse in the filter processing unit respectively; Single-chip microcomputer input and output PC mouth node Key1, Key2, Key3 link to each other with output in the button input block respectively, and node PD2 pin is just exported high level when button is pressed, and by audion 9014 buzzer BUZZ is sounded; Single-chip microcomputer input and output PC mouth node Chan1SingalSel1, Chan1SingalSel2, Chan2SingalSel1, Chan2SingalSel2 link to each other with control input in the signal selected cell respectively; Single-chip microcomputer input and output node PB0-PB11 respectively with the LCD display unit in the data input and output link to each other with control input; The input/output port node PB0-PB7 of single-chip microcomputer, PB9, PB10, PB12-PB15 respectively with memory element in data with control input and output link to each other; The input and output PC mouth node Sign1AmpA0 of single-chip microcomputer, the input and output PA mouth node Sign1AmpA1 of single-chip microcomputer, Sign2AmpA0, Sign2AmpA1 link to each other with control input in the signal amplitude regulon respectively; The input and output PC mouth node AD9833_FSYNC of single-chip microcomputer, AD9833_CLK, AD9833_1Data, AD9833_2Data, Normal_Signal2TypeSe1, Normal_Signal1TypeSel link to each other with Synchronization Control, clock, data input in the two pass numerical control convectional signals generation unit respectively; The input and output PB mouth node SelectChanA of single-chip microcomputer, the input and output PA mouth node SelectChanB of single-chip microcomputer, SelectChanC, Amp103A0, Amp103A1 link to each other with corresponding node in the signal amplitude numerical control regulon respectively.Supply node AV3.3, DV3.3, DV+5V, GND respectively with power supply unit in analog power 3.3V, digital power 3.3V, digital power+5V, link to each other, for this unit provides working power.
Aforementioned two pass numerical control convectional signals generation unit comprises first, second digital control signal generation chip U2, U3, the first dual operational amplifier chip U4, first analog switch 5 and a 12MH
ZCrystal oscillator U6, the data-in port of digital control signal generation chip U2, U3, Synchronization Control input port, input end of clock mouth are connected with the data input and output PC mouth of single-chip microcomputer U1 in the Single-chip Controlling unit respectively, and the signal output port of the first dual operational amplifier chip U4 is connected with the convectional signals input port of first, second analogue selector chip U10, U11 in the signal selected cell respectively.In the embodiment shown in fig. 3, two digital control signal generation chip U2, U3 adopt digital control signal generation chip AD9833, the first dual operational amplifier chip U4 adopts operational amplifier chip LT1362, the first analog switch U5 adopts analog switch chip ADG1221, and crystal oscillator U6 adopts 12MHz crystal oscillator chip OSC.The AD9833 integrated chip be a kind of high-performance 28 figure place control frequencies with 12 figure place control positions mutually, can produce high-precision sine, triangle, square wave.During with the 12MHz clock crystal oscillator, its numerical control frequency resolution can reach 12M/228 and be about 0.04470, and its numerical control phase discrimination rate can reach 360 degree/2
12Be about 0.087890 degree, precision is all very high mutually with the position for its frequency that hence one can see that.When needs output sine, triangle, square wave, utilize single-chip microcomputer to digital control signal generation chip transmitted frequency, position phase and signal type control word, produce the signal of corresponding frequencies, position phase and type, output signal after signal processing circuit, can be used as people's ear frequency characteristic and human body impedance The Characteristic Study and teaching, also can be used as demonstration simple harmonic oscillation synthetic signal source, also can be used as the high precision numerical control signal source etc. of general medicine electronics.Data input node AD9833_1Data and the AD9833_2Data of digital control signal generation chip AD9833, Synchronization Control input node AD9833_FSYNC, clock input node AD9833_CLK links to each other with the input and output PC mouth of single-chip microcomputer in the Single-chip Controlling unit respectively, single-chip microcomputer is imported data according to certain time sequence, produce required frequency by the AD9833 chip, the convectional signals of waveform, by analog switch chip ADG1221 and operational amplifier, operational amplifier chip LT1362 is from node Normal_Signal1, Normal_Signa2 exports, and joins with the convectional signals input in the signal selected cell.
Aforementioned filter processing unit is by first, the second digital filtering chip U8, U9, the second dual operational amplifier chip U7 and corresponding peripheral component constitute, first, the second digital filtering chip U8, the U9 signal input part is connected with the PWM output interface of aforementioned single-chip microcomputer U1, the input of the second dual operational amplifier chip U7 is connected first with the D/A of aforementioned single-chip microcomputer U1 conversion outfan, the second digital filtering chip U8, in the physiological signal outfan of U9 and the aforementioned signal selected cell first, the second analogue selector chip U10, the physiological signal input of U11 connects.Among the embodiment as shown in Figure 4, digital filtering chip U8, U9 adopt MAX291, and it mainly realizes the physiological signal of the inner D/A conversion of single-chip microcomputer STM32F103RD output is carried out filtering and amplification, handles to satisfy the back level.The second dual operational amplifier chip U7 adopts the LM358 chip, D/A output in its signal input node BioSign1, BioSign2 and the Single-chip Controlling unit is joined through the output of simple filtering, is input to the input of first, second digital filtering chip U8, U9 through its amplification.First, second digital filtering chip U8, U9 input filtering pulse is imported from node M AX291_CLK1, MAX291_CLK2 respectively, and link to each other with PWM (pulsewidth) output interface of single-chip microcomputer in the Single-chip Controlling unit, import the low-pass filtering that different pulse frequencies realizes different frequency, thereby obtain comparatively ideal physiological signal, and export physiological signal from first, second digital filtering chip U8, U9 output node BioSign1Out, BioSign2Out, join with the input in the signal selected cell.
Aforementioned signal selected cell comprises first, the second analogue selector chip U10, U11, the 3rd dual operational amplifier chip U12, first, the second analogue selector chip U10, the input control port of U11 is connected with the data input and output PC mouth of aforementioned single-chip microcomputer U1 respectively, first, the second analogue selector chip U10, the signal output port of the first dual operational amplifier chip U4 in the convectional signals input port of U11 and the aforementioned two pass numerical control convectional signals generation unit is connected, first, the second analogue selector chip U10, the physiological signal input of U11 respectively with aforementioned filter processing unit in first, the second digital filtering chip U8, the physiological signal output port of U9 connects, and the input port of the four-operational amplifier chip U14 in the output port of the big device chip of the 3rd double operational U12 and the aforementioned signal amplitude regulon is connected.In the embodiment shown in fig. 5, first, second analogue selector chip U10, U11 adopt analogue selector chip ADG1404, the 3rd dual operational amplifier chip U12 adopts high-performance double operational LT1362, wherein analogue selector chip ADG1404 realizes the selection of signal source under the control of single-chip microcomputer; Double operational LT1362 mainly realizes the impedance variation of analog switch output signal, improves carrying load ability, reduces the distortion of signal and the loss of amplitude.First, the second analogue selector chip U10, the convectional signals input node Normal_Signal1 of U11, Normal_Signal2 and physiological signal input Node B ioSign1Out, BioSign2Out links to each other with output in the filter processing unit with the output of two pass numerical control convectional signals generation unit respectively, input as convectional signals and physiological signal, first, the second analogue selector chip U10, the input control node ChanlSingalSel1 of U11, Chan1SingalSel2, Chan2SingalSel1, Chan2SingalSel2 links to each other with the input and output PC mouth of single-chip microcomputer in the Single-chip Controlling unit respectively, be used to select the signal type of needs output, after the 3rd dual operational amplifier chip U12 amplifies and follows, from its outfan node SelectedSignal1, SelectedSignal2 output, and the input of four-operational amplifier chip U14 joins in regulating with signal amplitude.
Aforementioned signal amplitude regulon comprises the 3rd, the 4th analogue selector chip U13, U15, four-operational amplifier chip U14 and respective peripheral components and parts, the output port of the big device chip of the 3rd double operational U12 in the input port of four-operational amplifier U14 and the aforementioned signal selected cell is connected, the 3rd, the 4th analogue selector chip U13, the control input end mouth of U15 is connected with aforesaid single-chip data input and output PC mouth respectively, and the signal output of four-operational amplifier chip U14 is through two potentiometer W1, the signal input port of power amplifier chip U16 in the travelling arm end of W2 and the power amplification unit is connected.Among the embodiment as shown in Figure 6, two analog switch chip U13, U15 adopt the ADG1404 chip, and four-operational amplifier U14 adopts high-performance amplifier LT1364 chip, mainly realizes the control of signal amplitude.Four-operational amplifier U14 signal input part node SelectedSignal1, SelectedSignal2 links to each other with the signal output part of the 3rd dual operational amplifier chip U12 in the signal selected cell, first, the second analog switch chip U13, the input control node Sign1AmpA0 of U15, Sign1AmpA1 and Sign2AmpA0, Sign2AmpA1 links to each other with the input and output PA mouth of single-chip microcomputer U1 in the monolithic control unit respectively, control analog selection switch is selected different amplifications, and through amplification of integrated operational amplifier LT1364 chip and potentiometer W1, after regulating, W2 is met the signal of amplitude requirement, and from two potentiometer W1, W2 travelling arm end node Sign1Amp, Sign2Amp output, the power amplifier U16 in power amplification unit provides input signal.
The aforementioned power amplifying unit is made of power amplifier U16 and corresponding peripheral component, the signal input port of power amplifier U16 is connected with the travelling arm end of two potentiometer W1, W2 that the four-operational amplifier chip U14 signal in the aforementioned signal amplitude regulon is exported, and the signal output port of power amplifier U16 is connected with numerical control amplitude adjusted unit input port with signal output interface.Among the embodiment as shown in Figure 7, power amplifier U16 adopts the THS6042 amplifier chip, and it has the driving force of very high signal, and the drive current of maximum 350mA can be provided, and has automatic short-circuit and heat protection function.Signal input part node Sign1Amp, the Sign2Amp of power amplifier U16 links to each other with two potentiometer W1 of signal output part, W2 travelling arm end in the signal amplitude regulon, after power amplifier THS6042 amplification, from signal output part node Sign1Out, Sign2Out output, link to each other with input in the numerical control amplitude adjusted unit with signal output interface.
Signal output interface is made of signal accessory power outlet and audio frequency accessory power outlet, and they are connected with the signal output part of power amplification unit, and the audio frequency accessory power outlet is in order to be connected with earphone.
Aforementioned numerical control amplitude adjusted unit comprises the 3rd, the 4th four-operational amplifier chip U23, U24, the 6th, the 7th dual operational amplifier chip U25, U26, the 6th analogue selector chip U27 and second digital-control amplifier chip U28 and the peripheral component, the input of the 3rd four-operational amplifier chip U23 is connected with the outfan of aforementioned power amplifying unit, the outfan of the 6th dual operational amplifier chip U25 is connected with the input/output terminal PA mouth of aforementioned single-chip microcomputer U1 respectively with the 6th analogue selector chip U27 input, and the input of the second digital-control amplifier chip U28 is connected with the input/output terminal PC mouth of aforementioned single-chip microcomputer U1.In the embodiment shown in fig. 8, three, the 4th four-operational amplifier chip U23, U24 adopt LT1364, TL084 chip respectively, six, the 7th dual operational amplifier chip U25, U26 adopt the LM358 chip, the 6th analogue selector chip U27 adopts ADG1404, the second digital-control amplifier chip U28 adopts PGA103U, realizes that mainly peak value detects.Wherein output contact Peak_MeasureADC, input node PeakCtrlA0, the PeakCtrlA1 of the 6th analogue selector chip U27 and input node PeakCtrlA2, the PeakCtrlA3 of the second digital-control amplifier chip U28 are connected with analogue signal input port node Peak_MeasureADC, input/output port PeakCtrlA0, PeakCtrlA1, PeakCtrlA2, the PeakCtrlA3 of single-chip microcomputer U1 respectively during the 7th dual operational amplifier chip U25.
The LCD display unit is made of 320 * 240 black-and-white crystals screen FM32240,20 core sockets and peripheral cell as shown in Figure 9, shows corresponding waveform or information under Single-chip Controlling.Input and output node DD0-DD7, input node LCDA0, LCDCS, LCDRD, LCDWR, LCDBackLight are connected with input and output PB mouth in the single-chip microcomputer respectively.
The button input block mainly is made of touch button, resistance, electric capacity etc., and its delivery outlet links to each other with the input and output P0 mouth of single-chip microcomputer in the Single-chip Controlling unit, mainly is the input that realizes information such as various function conversions, volume change.
USB interface mainly is made of USB socket and connecting line etc., the signal input output end of the USB engine of single-chip microcomputer U1 is connected in the input/output interface of USB interface and the Single-chip Controlling unit, utilize the USB engine of band in the LPC can realize and the computer communication, realize the change of physiological signal, self-defined waveform etc.
Aforementioned memory element comprises memory chip U17 and peripheral component, and the data input/output port of memory chip U17 is connected with the data input/output port of single-chip microcomputer U1 in the Single-chip Controlling unit.In the embodiment shown in fig. 10, memory chip U17 adopts boat 32M bytes Flash storage chip (the power down data are not lost) K9W5608U1M (32M), is mainly used in data of storing the physiological signal of measuring or the data that produce each physiological signal commonly used.When needs are preserved the measurement physiological signal, under the control of single-chip microcomputer, change to such an extent that data be saved in specific Flash memory block through A/D it; When needs output physiological signal, under the control of single-chip microcomputer, constantly the identical time is read data from specific Flash storage chip at interval, and data are sent into the D/A conversion, thereby produces corresponding physiological signal.The memorizer input and output PB mouth of the single-chip microcomputer U1 in back end DD0-DD7, control signal node M EMRB, MemRD, MemWR, MEMCE, MEMCLE, MEMALE and the Single-chip Controlling unit of sheet U17 links to each other, and control signal node M EMRB is connected with the input and output PA mouth of single-chip microcomputer U1.
Aforementioned signal amplitude numerical control regulon comprises two four-operational amplifier chip U18, U19, the big device chip of the 5th double operational U22, the 5th analogue selector chip U20, first digital-control amplifier chip U21 and the peripheral component, the input of first, second four-operational amplifier chip U18, U19 is connected with the outfan of signal input interface, the input of the 5th analogue selector chip U20 and digital-control amplifier chip 21, and the output port of the big device chip of the 5th double operational U22 is connected with the analogue signal input and output PA mouth of aforementioned single-chip microcomputer U1 respectively.In the embodiment shown in fig. 11, two four-operational amplifier chip U18, U19 adopts the TL084 chip, the big device chip of the 5th double operational U22 adopts the LM358 chip, the 3rd analogue selector chip U20 adopts the CD4051 chip, the first digital-control amplifier chip U21 adopts the PGA103U chip, first, the second four-operational amplifier chip U18, the input port ChanIn0-ChanIn7 of U19 links to each other with the outfan of input interface unit respectively, the input and output PB mouth of the 3rd analogue selector chip U20 input node SelectChanA and single-chip microcomputer, SelectChanB, SelectChanC is connected the Amp103A0 of digital-control amplifier chip U21 with the input and output PA mouth of single-chip microcomputer, Amp103A1 is connected with the input and output PA mouth of single-chip microcomputer; The output node SingalInADC of the big device chip of the 5th double operational U22 links to each other with the PA mouth analog input node of single-chip microcomputer; Two four high guaily unit TL084 mainly realize following of 8 road physiology signals, realize the impedance conversion; Analogue selector CD4051 mainly realizes selecting to realize together analog digital conversion from 8 roads, digital-control amplifier PAG103U is sent in its output, under the unitary control of Single-chip Controlling, realize a suitable amplification, output is sent into the Single-chip Controlling unit and is realized the ADC conversion behind double operational, and shows corresponding information by 320 * 240 LCD display unit.
This utility model can be exported the common normal and abnormal physiology signal of two pass such as electrocardio, pulse, hear sounds, respiratory wave etc. simultaneously, simultaneously can realize communicating by letter of computer and 32 single-chip microcomputers by USB interface, at any time increase, the various simulation physiological signal that needs generation, and can provide several frequencies to same physiological signal, with convenient with general oscillograph observation.Sine commonly used, the trigonometric sum square-wave signal of two pass high freuqency accuracy and high accuracy phase contrast can be exported simultaneously, experiment, research and teaching of human body impedance characteristic etc. can be extremely be advantageously used in.Can measure simultaneously and arrive 8 road physiology signals, and show relevant information such as its waveform.
The foregoing description also only is to be used to illustrate this utility model, is not to restriction of the present utility model, to improvement of the present utility model, all belongs to the scope of this utility model claim protection under design prerequisite of the present utility model.
Claims (8)
1. the multifunctional medical signal based on STM32 produces and measuring instrument, it is characterized in that:
1), includes Single-chip Controlling unit, two pass numerical control convectional signals generation unit, filter processing unit, signal selected cell, signal amplitude regulon, power amplification unit, signal output interface, numerical control amplitude adjusted unit, LCD display unit, pushbutton unit, signal input interface, signal amplitude numerical control regulon, USB interface and memory element;
2), there are D/A conversion, A/D conversion, USB engine in inside, Single-chip Controlling unit; The unitary control output end of Single-chip Controlling mouth is connected with the input of two pass numerical control convectional signals generation unit, and its outfan is connected with the input of signal selected cell; The input of filter processing unit is connected with the D/A conversion output port of inside, Single-chip Controlling unit, and its outfan is connected with the input of signal selected cell; The outfan of signal selected cell is connected with signal amplitude regulon input, the control input end of signal amplitude regulon is connected with the input of Single-chip Controlling unit controls outfan and power amplification unit respectively with outfan, the outfan of power amplification unit is connected with numerical control amplitude adjusted unit input with signal output interface, and numerical control amplitude adjusted unit outfan is connected with the A/D conversion input port of inside, Single-chip Controlling unit; The outfan of signal input interface is connected with the input of signal amplitude numerical control regulon, and the outfan of signal amplitude numerical control regulon is connected with the unitary input/output port of Single-chip Controlling; The outfan of the input/output interface of memory element, the input/output interface of USB interface and button input block is connected with the unitary input/output interface of Single-chip Controlling, USB engine and signal input part respectively.
2. the multifunctional medical signal based on STM32 according to claim 1 produces and measuring instrument, it is characterized in that aforementioned Single-chip Controlling unit comprises single-chip microcomputer (U1) and corresponding peripheral component, single-chip microcomputer (U1) adopts 32 single-chip microcomputer STM32F103RD, and there are D/A conversion, A/D conversion, USB engine in inside; The analogue signal input and output PA mouth of single-chip microcomputer (U1) is connected with input/output port in numerical control amplitude adjusted unit, signal amplitude regulon, the signal amplitude numerical control regulon respectively; Single-chip microcomputer D/A delivery outlet, PWM delivery outlet, USB engine respectively with filter processing unit in physiological signal input, filtering pulse link to each other with USB interface; Single-chip microcomputer input and output PC mouth is connected with input port in signal selected cell, button input block, the two pass numerical control convectional signals generation unit respectively, and single-chip microcomputer input and output PB mouth is connected with input/output port in memory element, the LCD display unit respectively.
3. the multifunctional medical signal based on STM32 according to claim 1 produces and measuring instrument, it is characterized in that aforementioned two pass numerical control convectional signals generation unit comprises first, the second digital control signal generation chip (U2, U3), the first dual operational amplifier chip (U4), first analog switch (U5) and a 12MHZ crystal oscillator (U6), digital control signal generation chip (U2, U3) data-in port, the Synchronization Control input port, the input end of clock mouth is connected with the data input and output PC mouth of single-chip microcomputer (U1) in the Single-chip Controlling unit respectively, the signal output port of the first dual operational amplifier chip (U4) respectively with the signal selected cell in first, the second analogue selector chip (U10, U11) convectional signals input port connects.
4. the multifunctional medical signal based on STM32 according to claim 1 produces and measuring instrument, it is characterized in that aforementioned filter processing unit is by first, the second digital filtering chip (U8, U9), the second dual operational amplifier chip (U7) and corresponding peripheral component constitute, first, the second digital filtering chip (U8, U9) signal input part is connected with the PWM output interface of aforementioned single-chip microcomputer (U1), the input of the second dual operational amplifier chip (U7) is connected first with the D/A conversion outfan of aforementioned single-chip microcomputer (U1), the second digital filtering chip (U8, U9) first in physiological signal outfan and the aforementioned signal selected cell, the second analogue selector chip (U10, U11) physiological signal input connects.
5. the multifunctional medical signal based on STM32 according to claim 1 produces and measuring instrument, it is characterized in that aforementioned signal selected cell comprises first, the second analogue selector chip (U10, U11), the 3rd dual operational amplifier chip (U12), first, the second analogue selector chip (U10, U11) input control port is connected with the data input and output PC mouth of aforementioned single-chip microcomputer (U1) respectively, first, the second analogue selector chip (U10, the signal output port of the first dual operational amplifier chip (U4) in convectional signals input port U11) and the aforementioned two pass numerical control convectional signals generation unit is connected, first, the second analogue selector chip (U10, U11) physiological signal input respectively with aforementioned filter processing unit in first, the second digital filtering chip (U8, U9) physiological signal output port connects, and the input port of the four-operational amplifier chip (U14) in the output port of the big device chip of the 3rd double operational (U12) and the aforementioned signal amplitude regulon is connected.
6. the multifunctional medical signal based on STM32 according to claim 1 produces and measuring instrument, it is characterized in that aforementioned signal amplitude regulon comprises the 3rd, the 4th analogue selector chip (U13, U15), four-operational amplifier chip (U14) and respective peripheral components and parts, the output port of the big device chip of the 3rd double operational (U12) in the input port of four-operational amplifier (U14) and the aforementioned signal selected cell is connected, the 3rd, the 4th analogue selector chip (U13, U15) control input end mouth is connected with aforesaid single-chip data input and output PA mouth respectively, and the signal output of four-operational amplifier chip (U14) is through two potentiometer (W1, the signal input port of the power amplifier chip (U16) in travelling arm end W2) and the power amplification unit is connected.
7. the multifunctional medical signal based on STM32 according to claim 1 produces and measuring instrument, it is characterized in that aforementioned numerical control amplitude adjusted unit comprises the 3rd, the 4th four-operational amplifier chip (U23, U24), the 6th, the 7th dual operational amplifier chip (U25, U26), the 6th analogue selector chip (U27) and second digital-control amplifier chip (U28) and the peripheral component, the input of the 3rd four-operational amplifier chip (U23) is connected with the outfan of aforementioned power amplifying unit, the outfan of the 6th dual operational amplifier chip (U25) is connected with the input/output terminal PA mouth of aforementioned single-chip microcomputer (U1) respectively with the 6th analogue selector chip (U27) input, and the input of the second digital-control amplifier chip (U28) is connected with the input/output terminal PC mouth of aforementioned single-chip microcomputer (U1).
8. the multifunctional medical signal based on STM32 according to claim 1 produces and measuring instrument, it is characterized in that aforementioned signal amplitude numerical control regulon comprises two four-operational amplifier chip (U18, U19), the big device chip of the 5th double operational (U22), the 5th analogue selector chip (U20), first digital-control amplifier chip (U21) and the peripheral component, first, the second four-operational amplifier chip (U18, U19) input is connected with the outfan of signal input interface, the input of the 5th analogue selector chip (U20) and digital-control amplifier chip (21), and the output port of the big device chip of the 5th double operational (U22) is connected with the analogue signal input and output PA mouth of aforementioned single-chip microcomputer (U1) respectively.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684605A (en) * | 2012-06-13 | 2012-09-19 | 太原理工大学 | Noise waveform signal generating device |
| CN102707752A (en) * | 2012-06-29 | 2012-10-03 | 南京航空航天大学 | Multifunctional moment loading controller |
| CN103572020A (en) * | 2012-12-07 | 2014-02-12 | 江苏大学 | STM32-based laser shock peening motion control method and control card |
| CN107589700A (en) * | 2017-10-16 | 2018-01-16 | 浙江大学 | A kind of EEG signals simulation generator |
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2011
- 2011-04-06 CN CN2011200973084U patent/CN202036203U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684605A (en) * | 2012-06-13 | 2012-09-19 | 太原理工大学 | Noise waveform signal generating device |
| CN102684605B (en) * | 2012-06-13 | 2014-10-29 | 太原理工大学 | noise waveform signal generating device |
| CN102707752A (en) * | 2012-06-29 | 2012-10-03 | 南京航空航天大学 | Multifunctional moment loading controller |
| CN103572020A (en) * | 2012-12-07 | 2014-02-12 | 江苏大学 | STM32-based laser shock peening motion control method and control card |
| CN103572020B (en) * | 2012-12-07 | 2015-04-22 | 江苏大学 | STM32-based laser shock peening motion control method and control card |
| CN107589700A (en) * | 2017-10-16 | 2018-01-16 | 浙江大学 | A kind of EEG signals simulation generator |
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