CN108030477A - A kind of pulse-taking instrument for tele-medicine - Google Patents
A kind of pulse-taking instrument for tele-medicine 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
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
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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
- A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
- A61B5/0015—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network characterised by features of the telemetry system
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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
- A61B5/48—Other medical applications
- A61B5/4854—Diagnosis based on concepts of traditional oriental medicine
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/02—Details of sensors specially adapted for in-vivo measurements
- A61B2562/0247—Pressure sensors
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Abstract
A kind of pulse-taking instrument for tele-medicine of the present invention belongs to the technical field of electronic equipment, its structure has microcontroller (1), display panel module (2), keyboard input module (3), bluetooth communication (4), pressure sensor module (5), waveform acquisition module (6), high fidelity signals translation circuit (7), noise suppression circuit (8), temperature sensor (9), temperature-compensation circuit (10), add circuit (11), analog-digital converter (12) and wrist strap (13).The present invention has the characteristics that high certainty of measurement, strong antijamming capability, influenced by ambient temperature small, and measurement result facilitates mobile phone to check, is expanding space of providing a convenient of tele-medicine.
Description
Technical field
The invention belongs to the technical field of electronic equipment, more particularly to a kind of pulse-taking instrument for tele-medicine.
Background technology
Social development is rapid now, and people's live and work rhythm is all quickly so that and the life stress of people is increasing,
Body is easily accessible inferior health or morbid state.The traditional Chinese medical science raises the body in sub-health state in health, has very much
Effective method.The traditional Chinese medical science has long history, is even more to take the course of its own in the world.Diagnosis by feeling the pulse is that the traditional Chinese medical science is hoped, hears, asks, cut
Important link in " four methods of diagnosis ", is one of marrow of the traditional Chinese medical science, is a kind of embodiment of tcm diagnosis basic principle " in carrying outside department ".In
Medicine thinks that lesion occurs for viscera qi and blood, and blood vessels operation will be affected, and pulse condition just changes, therefore diagnosis by feeling the pulse is being faced
The advance and retreat prognosis of deducibility disease on bed, objective basis is provided for the treatment of disease.Each from ancient times to the present name doctor accumulates for diagnosis by feeling the pulse
Abundant Academic Experience, but diagnosis by feeling the pulse is all to determine the state of an illness by doctor's subjective judgement.This causes diagnosis by feeling the pulse result to disease description
Accuracy, reproducibility and uniformity be under suspicion.How with objective scientific instrument, the function of diagnosis by feeling the pulse is explained with numeral
It is clear, it is always the target that people make great efforts.Numerous scientific workers worldwide expand correlative study for this, with
The developing of epoch, the progress of science and technology, pulse-taking instrument come into being.
Since the fifties in last century, with the fast development of electronic technology, many experts both at home and abroad, which just contemplate, passes through profit
With modern science and technology, develop can be used for pulse wave spectrum it is more accurate, objectify and intelligentized pulse-taking instrument.With a variety of surveys
Examination technology and method, are directed to pulse wave spectrum research, it is expected the ways and means with modern science, the sensation under doctor is referred to turns
Change the data that can be analyzed using modern science and technology means into, and gathered and shown, so as to change that
The situation of subjective, abstract " know clearly in the heart, refer to lower hardly possible bright ".It is theoretical according to pulse wave spectrum, carry out the collection of pulse condition multidimensional information
Analyzed with pulse condition information, objective basis can be provided for the diagnosis and early detection of some clinical common major diseases.Publication No.
The Chinese patent " electronics pulse-taking instrument " of CN104905771A is to be passed with the immediate prior art of the present invention, the patent using pressure
Sensor gathers the cun,guan,chi signal of patient, recycles signal amplifier and A/D converter that the signal of collection is amplified and changed
Computer system is sent into digital signal, is compared with the pulse condition collection of illustrative plates stored in computer system.The patent structure is simple,
Pulse signal is converted into electric signal and is digitized so that doctor can carry out quantitative study to pulse signal, and avoid
The influence of subjective factor when different doctors feel the pulse same pulse condition.
But the existing diagnosis by feeling the pulse technology including CN104905771A is mainly reflected in following also there are shortcomings
Aspect：1st, the pulse signal of pressure sensor collection is defeated in special ultra-weak electronic signal, and existing diagnosis by feeling the pulse system is using common
Amplifier easily produce distortion when being amplified to it；2nd, the output impedance of pressure sensor is generally large, and with pressure
Transforming impedance can change, and common voltage amplifier (such as in-phase proportion amplifier, anti-phase proportional amplifier etc.)
Input impedance be difficult to it is matched, so as to influence the normal work of pressure sensor；3rd, useful signal of the ambient noise to collection
Have a great influence, such as cannot effectively suppress, then the waveform finally obtained can be made to have serious distortion, it is impossible to the original arteries and veins of actual response
As；4th, pressure sensor is generally influenced by environmental temperature, at different ambient temperatures, past to the collection result of same pulse condition
It is past to have very big offset so that collection result does not have uniformity.
The above defect all carrys out many inconvenience to follow-up diagnosis, analytic band, it is easy to causes mistaken diagnosis, therefore existing arteries and veins
Examine equipment also need to it is further perfect.
The content of the invention
The technical problem to be solved in the present invention is overcome in background technology existing for existing pulse signal acquisition technique not
Foot, there is provided a kind of pulse-taking instrument for tele-medicine is small, influenced by ambient temperature small for mesh to reach high certainty of measurement, distortion
's.
The technical solution that the present invention takes is as follows：
A kind of pulse-taking instrument for tele-medicine, its structure have microcontroller 1, display panel module 2, keyboard input module 3, pressure
Force snesor module 5, waveform acquisition module 6, analog-digital converter 12 and wrist strap 13；It is characterized in that, structure also has Bluetooth communication
Module 4, high fidelity signals translation circuit 7, noise suppression circuit 8, temperature sensor 9, temperature-compensation circuit 10, add circuit
11；
The display panel module 2, bluetooth communication 4 are connected with microcontroller 1；
The keyboard input module 3 has power switch, start button, checks button；
The pressure sensor module 5 is made of three rheostat pressure sensors；The waveform acquisition module 6 by
One four is selected an analog switch chip to form；Four select the public output and high fidelity signals translation circuit of an analog switch chip
7 input terminal is connected, and control terminal is connected with microcontroller 1,4 selection input terminals, three changes with pressure sensor module 5 respectively
One end of resistance pressure transducer is connected, the other end ground connection of three rheostat pressure sensors of pressure sensor 5；
The pressure sensor module 5 is attached to the inner side of wrist strap 13, and wrist strap 13 is used to fix pressure sensor module 5
In the wrist of measured and make pressure sensor module 5 cover measured pulse area；
The structure of the high fidelity signals translation circuit 7 is that the inverting input of amplifier U1A becomes as high fidelity signals
The input terminal of circuit 7 is changed, is denoted as port PSensor, the four of welding wave acquisition module 6 selects the public output of an analog switch chip
End, the inverting input of amplifier U1A and the indirect resistance R1 of output terminal, the in-phase input end of output termination amplifier U1B, amplifier
The inverting input of U1B and the indirect resistance R2 of output terminal, output terminal of the output terminal as high fidelity signals translation circuit 7, note
For port RudePO, the input terminal of noise suppression circuit 8 is connect；A termination power VCC of slide rheostat W1, other end ground connection,
The in-phase input end of slip termination amplifier U1A and the in-phase input end of amplifier U2A, the anti-phase input terminating resistor R4 of amplifier U2A
One end, one end, one end of resistance R6 of resistance R5, resistance R6 the other end ground connection, another termination amplifier U2A's of resistance R4
Output terminal, one end of another termination slide rheostat W2 of resistance R5, the slip termination amplifier U1B's of slide rheostat W2 is anti-phase
Input terminal, one end of the output terminating resistor R3 of amplifier U2A, the inverting input of another termination amplifier U1B of resistance R3, amplifier
The positive power source terminal of U1A and amplifier U2A all meet power supply VCC, and negative power end is all grounded；
The structure of the noise suppression circuit 8 is that the inverting input of amplifier U2B is connected with output terminal, homophase input
One end of terminating resistor R8 and one end of capacitance C1, the other end ground connection of capacitance C1, the one of another terminating resistor R7 of resistance R8
End and one end of capacitance C2, the input terminal of the other end of resistance R7 as noise suppression circuit 8, are denoted as port RudePI, connect height
The output terminal of Fidelity signal translation circuit 7, the output terminal of another termination amplifier U2B of capacitance C2, the output termination electricity of amplifier U2B
Hinder one end of R9, one end of one end of another termination capacitor C3 of resistance R9, one end of resistance R10 and resistance R11, capacitance C3's
The other end is grounded, the inverting input of another termination amplifier U3A of resistance R10 and one end of capacitance C4, the other end of resistance R11
It is grounded with the in-phase input end of the output terminal amplifier U3A of another termination amplifier U3A of capacitance C4, positive supply termination power VCC, bears
Power end is grounded, and output terminal of the output terminal as noise suppression circuit 8, is denoted as port PO；
The structure of the temperature-compensation circuit 10 is that the minus earth of zener diode D1, anode connects the same of amplifier U3B
One end of phase input terminal and resistance R12, inverting input and the capacitance C5 of another termination power VCC of resistance R12, amplifier U1B
One end, the emitter of triode Q1 be connected with the end of slide wire of slide rheostat W3, a terminating resistor R14 of slide rheostat W3
One end, the other end ground connection of resistance R14, the output terminal of another termination amplifier U3B of capacitance C5 and one end of resistance R13, electricity
The base stage of another termination triode Q1 of R13, one end of the collector connecting resistance R17 of triode Q1 are hindered, and is used as temperature-compensating
The input cathode of circuit 11, is denoted as port NTC-, the inverting input of another termination amplifier U4A of resistance R17, amplifier U4A
Inverting input and output terminal indirect resistance R18, one end of homophase input terminating resistor R15 and one end of resistance R16, electricity
Hinder the other end ground connection of R16, another termination power VCC of resistance R15, and as the input anode of temperature-compensation circuit 11,
Port NTC+ is denoted as, the positive supply termination power VCC of amplifier U4A, negative power end ground connection, output terminal is as temperature-compensation circuit 11
Output terminal, be denoted as port TemCOMP；
The structure of the add circuit 11 is, the inverting input of amplifier U4B and one end of resistance R17, resistance R18
One end is connected, and the other end ground connection of resistance R17, the output terminal of another termination amplifier U4B of resistance R18, amplifier U4B's is same mutually defeated
Enter the one end at end and resistance R15, one end of resistance R16 is connected, the input of the other end of resistance R16 as add circuit 11
End, is denoted as port TempCOMPin, is connected with the port TemCOMP of temperature-compensation circuit 10, and the other end of resistance R15, which is used as, to be added
Another input terminal of method circuit 11, is denoted as port PI, is connected with the port PO of noise suppression circuit 8, the output terminal of amplifier U4B
As the output terminal of add circuit 11, port P_COMP is denoted as, is connected with the input end of analog signal of analog-digital converter 12；
The digital signal output end of the analog-digital converter 12 is connected with microcontroller 1.
Preferably, the temperature sensor 9 is positioned over the central area of pressure sensor module 5, and positive and negative electrode point
It is not connected with the input terminal positive and negative electrode of temperature-compensation circuit 10.
Beneficial effect：
1st, the present invention uses high fidelity signals translation circuit, using the non-linear amplifying technique of variable coefficient, by pressure signal essence
Really it is converted into the voltage signal for being adapted to subsequent conditioning circuit processing.
2nd, the characteristics of present invention is directed to pulse signal and noise signal, is designed with quadravalence noise suppressed before analog-to-digital conversion
Circuit, can effectively suppress the interference of environment and human body noise to pulse signal.
3rd, the present invention eliminates influence of the variation of ambient temperature to pressure sensor using temperature-compensation circuit.
4th, test result can be sent to smart mobile phone by the present invention by bluetooth communication, utilize smart mobile phone and network
Powerful opening, provide convenient hardware foundation for the further Function Extension such as remote diagnosis.
Brief description of the drawings
Fig. 1 is the physical arrangement schematic diagram of the present invention.
Fig. 2 is the electrical connection schematic diagram of the present invention.
Fig. 3 is pressure sensor module 5 and the connection diagram of waveform acquisition module 6 in the present invention.
Fig. 4 is the basic circuit diagram of the high fidelity signals translation circuit 7 used in the present invention.
Fig. 5 is the basic circuit diagram of the noise suppression circuit 8 used in the present invention.
Fig. 6 is the basic circuit diagram for the temperature-compensation circuit 10 that the present invention uses.
Fig. 7 is the basic circuit diagram for the add circuit 11 that the present invention uses.
Embodiment
The implementation to the present invention is specifically described below in conjunction with the accompanying drawings, the device ginseng marked in accompanying drawings and embodiments
Number is preferred parameter, rather than the limitation to protection scope of the present invention.
The overall structure of the present invention of embodiment 1
The present invention physical arrangement as shown in Figure 1, electrical connection as shown in Fig. 2, the present invention structure include microcontroller 1,
Display panel module 2, keyboard input module 3, bluetooth communication 4, pressure sensor module 5, waveform acquisition module 6, high-fidelity
Signal conversion circuit 7, noise suppression circuit 8, temperature sensor 9, temperature-compensation circuit 10, add circuit 11, analog-digital converter
12 and wrist strap 13.
The high fidelity signals translation circuit of the present invention of embodiment 2
As shown in figure 4, the present invention employs a high fidelity signals translation circuit after waveform acquisition circuit, specific knot
Structure is, the input terminal of the inverting input of amplifier U1A as high fidelity signals translation circuit 7, is denoted as port PSensor, connects ripple
Four public output for selecting an analog switch chip in shape acquisition module 6, the inverting input and output terminal of amplifier U1A are indirectly
The indirect resistance R2 of resistance R1, the in-phase input end of output termination amplifier U1B, the inverting input of amplifier U1B and output terminal, it is defeated
Output terminal of the outlet as high fidelity signals translation circuit 7, is denoted as port RudePO, connects the input terminal of noise suppression circuit 8；It is sliding
A termination power VCC of dynamic rheostat W1, other end ground connection, the in-phase input end of slip termination amplifier U1A and amplifier U2A's is same
Phase input terminal, one end of anti-phase input terminating resistor R4, one end of resistance R5, one end of resistance R6 of amplifier U2A, resistance R6's
The other end is grounded, the output terminal of another termination amplifier U2A of resistance R4, and the one of another termination slide rheostat W2 of resistance R5
End, the inverting input of the slip termination amplifier U1B of slide rheostat W2, one end of the output terminating resistor R3 of amplifier U2A, electricity
The positive power source terminal of the inverting input of another termination amplifier U1B of resistance R3, amplifier U1A and amplifier U2A all connect power supply VCC, negative electricity
Source is all grounded.
The circuit uses the non-linear amplifying technique of variable coefficient, the amplification coefficient of circuit is changed with the change of prime signal
Become, so that the change in resistance information of forepressure sensor to be converted into carrying out without distortion to the voltage signal of analog-to-digital conversion.
The noise suppression circuit of the present invention of embodiment 3
As shown in figure 5, the present invention is also added into noise suppression circuit, concrete structure is amplifier before analog-to-digital conversion
The inverting input of U2B is connected with output terminal, and one end of homophase input terminating resistor R8 and one end of capacitance C1, capacitance C1's is another
One end is grounded, one end of another terminating resistor R7 and one end of capacitance C2 of resistance R8, and the other end of resistance R7 presses down as noise
The input terminal of circuit 8 processed, is denoted as port RudePI, connects the output terminal of high fidelity signals translation circuit 7, another termination of capacitance C2
The output terminal of amplifier U2B, one end of the output terminating resistor R9 of amplifier U2B, one end of another termination capacitor C3 of resistance R9, electricity
One end of R10 and one end of resistance R11 are hindered, the other end ground connection of capacitance C3, another termination amplifier U3A's of resistance R10 is anti-phase
The output terminal amplifier U3A of one end of input terminal and capacitance C4, the other end of resistance R11 and another termination amplifier U3A of capacitance C4
In-phase input end ground connection, positive supply termination power VCC, negative power end ground connection, output of the output terminal as noise suppression circuit 8
End, is denoted as port PO.
Since the pressure sensor for detecting pulse signal is easily disturbed by human biological electricity and ambient noise, this hair
Bright the characteristics of being directed to pulse signal and human body and ambient noise signal, noise suppression circuit is devised, can be had before analogue-to-digital
Effect suppresses noise, improves the reliability of measurement result.
The temperature compensation function of the present invention of embodiment 4
In order to overcome influence of the environment temperature to pressure sensor, the present invention devises temperature compensation function, including temperature
Sensor 9, temperature-compensation circuit 10 and add circuit 11.
For temperature-compensation circuit 10 as shown in fig. 6, concrete structure is, the minus earth of zener diode D1, anode connects amplifier
The in-phase input end of U3B and one end of resistance R12, another termination power VCC of resistance R12, the inverting input of amplifier U1B with
One end of capacitance C5, the emitter of triode Q1 are connected with the end of slide wire of slide rheostat W3, a termination of slide rheostat W3
One end of resistance R14, the other end ground connection of resistance R14, the output terminal of another termination amplifier U3B of capacitance C5 and resistance R13's
One end, the base stage of another termination triode Q1 of resistance R13, one end of the collector connecting resistance R17 of triode Q1, and as temperature
The input cathode of compensation circuit 11 is spent, is denoted as port NTC-, the inverting input of another termination amplifier U4A of resistance R17, fortune
Put the inverting input of U4A and the indirect resistance R18 of output terminal, one end of homophase input terminating resistor R15 and the one of resistance R16
End, the other end ground connection of resistance R16, another termination power VCC of resistance R15, and as the input terminal of temperature-compensation circuit 11
Cathode, is denoted as port NTC+, the positive supply termination power VCC of amplifier U4A, negative power end ground connection, output terminal is as temperature-compensating
The output terminal of circuit 11, is denoted as port TemCOMP.
Add circuit is as shown in fig. 7, concrete structure is, the inverting input of amplifier U4B and one end of resistance R17, resistance
One end of R18 is connected, the other end ground connection of resistance R17, the output terminal of another termination amplifier U4B of resistance R18, amplifier U4B's
In-phase input end is connected with one end of resistance R15, one end of resistance R16, the other end of resistance R16 as add circuit 11 one
A input terminal, is denoted as port TempCOMPin, is connected with the port TemCOMP of temperature-compensation circuit 10, the other end of resistance R15
As another input terminal of add circuit 11, port PI is denoted as, is connected with the port PO of noise suppression circuit 8, amplifier U4B's
Output terminal of the output terminal as add circuit 11, is denoted as port P_COMP, the input end of analog signal phase with analog-digital converter 12
Even；
Temperature sensor 9 is used for the environment temperature residing for detection pressure sensor assembly 5, is calculated by temperature-compensation circuit 10
Go out the margin of error caused by temperature, then merged by the result that add circuit 11 is measured with pressure sensor module 5, to disappear
Except influence of the environment temperature to measurement result.
The operation principle and process of the present invention of embodiment 5
With reference to figure 1, during work, first wrist strap 13 is sleeved in the wrist of tester, and make three of pressure sensor module 5
The cun,guan,chi region of pressure sensor coverage test person's pulse, opens the power switch of the present invention, 2 meeting of display panel module
Show self-test information, armed state is shown after the completion of self-test, press start button, the device of the invention is started to work, microcontroller 1
The four of control waveform acquisition module 6 select an analog switch chip (MAX4734), and timesharing selection is carried out to three pressure sensors,
Each pressure sensor detects the change (being inversely proportional with pressure) of pressure, and the change in resistance is by high fidelity signals translation circuit 7
Detect, so that the overall amplification coefficient of high fidelity signals translation circuit 7 changes and (is inversely proportional with resistance value), and then defeated
The change voltage signal that outlet is amplified, the signal is after noise suppression circuit 8, the noise signal that is superimposed with pulse signal
It can be eliminated.Meanwhile the environment residing for temperature sensor 9 (25 DEG C of thermistors of MF11-10k@) detection pressure sensor assembly 5
Temperature, the margin of error as caused by temperature-compensation circuit 10 calculates temperature, then the result exported with noise suppression circuit 8 is together
Add circuit 11 is sent into, environment temperature will be eliminated the error that measurement result produces in add circuit 11, and add circuit will
The result feeding analog-digital converter 12 (AD7688) for eliminating error is converted into feeding microcontroller 1 after digital signal.Last monolithic
Machine 1 stores No. 3 pressure sensors the result that cun,guan,chi measures respectively.
By checking button, it can check in system and gather the information of storage, by bluetooth communication 4 (MS47SF3) originally
Invention can be achieved to communicate with smart mobile phone, and after smart mobile phone is matched with it, the collection information that is stored in readable device can be with
Network data base is established, it is remote to realize in the database that the pulse information for being collected the device of the invention by mobile phone uploads
The further expanded function such as journey diagnosis and treatment.
Claims (2)
1. a kind of pulse-taking instrument for tele-medicine, its structure has microcontroller (1), display panel module (2), keyboard input module
(3), pressure sensor module (5), waveform acquisition module (6), analog-digital converter (12) and wrist strap (13)；It is characterized in that, knot
Structure also has bluetooth communication (4), high fidelity signals translation circuit (7), noise suppression circuit (8), temperature sensor (9), temperature
Spend compensation circuit (10), add circuit (11)；
The display panel module (2), bluetooth communication (4) are connected with microcontroller (1)；
The keyboard input module (3) has power switch, start button, checks button；
The pressure sensor module (5) is made of three rheostat pressure sensors；The waveform acquisition module (6) by
One four is selected an analog switch chip to form；Four select the public output and high fidelity signals translation circuit of an analog switch chip
(7) input terminal is connected, and control terminal is connected with microcontroller (1), 4 selection input terminals respectively with pressure sensor module (5)
One end of three rheostat pressure sensors is connected, another termination of three rheostat pressure sensors of pressure sensor (5)
Ground；
The pressure sensor module (5) is attached to the inner side of wrist strap (13), and wrist strap (13) is used for pressure sensor module (5)
It is fixed in the wrist of measured and makes the pulse area of pressure sensor module (5) covering measured；
The structure of the high fidelity signals translation circuit (7) is that the inverting input of amplifier U1A is converted as high fidelity signals
The input terminal of circuit (7), is denoted as port PSensor, and the four of welding wave acquisition module (6) selects the public defeated of an analog switch chip
Outlet, the inverting input of amplifier U1A and the indirect resistance R1 of output terminal, the in-phase input end of output termination amplifier U1B, amplifier
The inverting input of U1B and the indirect resistance R2 of output terminal, output terminal of the output terminal as high fidelity signals translation circuit (7),
Port RudePO is denoted as, connects the input terminal of noise suppression circuit (8)；A termination power VCC of slide rheostat W1, another termination
Ground, the in-phase input end of slip termination amplifier U1A and the in-phase input end of amplifier U2A, the anti-phase input terminating resistor of amplifier U2A
One end of R4, one end of resistance R5, one end of resistance R6, the other end ground connection of resistance R6, another termination amplifier U2A of resistance R4
Output terminal, one end of another termination slide rheostat W2 of resistance R5, the slip termination amplifier U1B's of slide rheostat W2 is anti-
Phase input terminal, one end of the output terminating resistor R3 of amplifier U2A, the inverting input of another termination amplifier U1B of resistance R3, fortune
The positive power source terminal for putting U1A and amplifier U2A all meets power supply VCC, and negative power end is all grounded；
The structure of the noise suppression circuit (8) is that the inverting input of amplifier U2B is connected with output terminal, in-phase input end
One end of connecting resistance R8 and one end of capacitance C1, the other end ground connection of capacitance C1, one end of another terminating resistor R7 of resistance R8
With one end of capacitance C2, the input terminal of the other end of resistance R7 as noise suppression circuit (8), is denoted as port RudePI, connects height
The output terminal of Fidelity signal translation circuit (7), the output terminal of another termination amplifier U2B of capacitance C2, the output termination of amplifier U2B
One end of resistance R9, one end of one end of another termination capacitor C3 of resistance R9, one end of resistance R10 and resistance R11, capacitance C3
Other end ground connection, the inverting input of another termination amplifier U3A of resistance R10 and one end of capacitance C4, resistance R11's is another
The in-phase input end ground connection of the output terminal amplifier U3A of another termination amplifier U3A of end and capacitance C4, positive supply termination power VCC,
Negative power end is grounded, and output terminal of the output terminal as noise suppression circuit (8), is denoted as port PO；
The structure of the temperature-compensation circuit (10) is the minus earth of zener diode D1, and anode connects the same phase of amplifier U3B
One end of input terminal and resistance R12, the inverting input of another termination power VCC of resistance R12, amplifier U1B are with capacitance C5's
One end, the emitter of triode Q1 are connected with the end of slide wire of slide rheostat W3, a terminating resistor R14's of slide rheostat W3
One end, the other end ground connection of resistance R14, the output terminal of another termination amplifier U3B of capacitance C5 and one end of resistance R13, resistance
The base stage of another termination triode Q1 of R13, one end of the collector connecting resistance R17 of triode Q1, and as temperature-compensating electricity
The input cathode on road (11), is denoted as port NTC-, the inverting input of another termination amplifier U4A of resistance R17, amplifier U4A
Inverting input and output terminal indirect resistance R18, one end of homophase input terminating resistor R15 and one end of resistance R16, electricity
The other end ground connection of R16, another termination power VCC of resistance R15 are hindered, and is rectified as the input of temperature-compensation circuit (11)
Pole, is denoted as port NTC+, the positive supply termination power VCC of amplifier U4A, negative power end ground connection, output terminal is as temperature-compensating electricity
The output terminal on road (10), is denoted as port TemCOMP；
The structure of the add circuit (11) is the inverting input of amplifier U4B and one end of resistance R17, the one of resistance R18
End is connected, the other end ground connection of resistance R17, the output terminal of another termination amplifier U4B of resistance R18, the homophase input of amplifier U4B
End is connected with one end of resistance R15, one end of resistance R16, and the other end of resistance R16 is inputted as one of add circuit (11)
End, is denoted as port TempCOMPin, is connected with the port TemCOMP of temperature-compensation circuit (10), the other end conduct of resistance R15
Another input terminal of add circuit (11), is denoted as port PI, is connected with the port PO of noise suppression circuit (8), amplifier U4B's
Output terminal of the output terminal as add circuit (11), is denoted as port P_COMP, is inputted with the analog signal of analog-digital converter (12)
End is connected；
The digital signal output end of the analog-digital converter (12) is connected with microcontroller (1).
A kind of 2. pulse-taking instrument for tele-medicine according to claim 1, it is characterised in that the temperature sensor
(9) it is positioned over the central area of pressure sensor module (5), and the positive and negative electrode input terminal with temperature-compensation circuit (10) respectively
Positive and negative electrode is connected.
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| CN201711314267.8A CN108030477A (en) | 2017-12-12 | 2017-12-12 | A kind of pulse-taking instrument for tele-medicine |
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| CN201711314267.8A CN108030477A (en) | 2017-12-12 | 2017-12-12 | A kind of pulse-taking instrument for tele-medicine |
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Application publication date: 20180515 |