CN209285500U - Myoelectricity Acquisition Circuit - Google Patents
Myoelectricity Acquisition Circuit Download PDFInfo
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- CN209285500U CN209285500U CN201822146450.8U CN201822146450U CN209285500U CN 209285500 U CN209285500 U CN 209285500U CN 201822146450 U CN201822146450 U CN 201822146450U CN 209285500 U CN209285500 U CN 209285500U
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Abstract
The utility model belongs to electronic circuit technology field, more particularly to a kind of be converted into single supply power supply the myoelectricity Acquisition Circuit that dual power supply is powered to component.It includes that signal pickup circuit, trap circuit, signal follow circuit, high-pass filtering circuit, low-pass filter circuit, power circuit and logical output circuit, the signal pickup circuit, trap circuit, signal follow circuit, high-pass filtering circuit, low-pass filter circuit and logical output circuit to be sequentially connected, and the power circuit is connected to signal pickup circuit, signal follows circuit and logical output circuit.The myoelectricity Acquisition Circuit is using two paths of differential signals, all the way with reference to acquisition amplification muscle electric signal, and two-pass DINSAR distribution of electrodes, in the two sides of reference electrode, be in line distribution, and while acquiring electromyography signal, original electromyography signal is amplified.
Description
Technical field
The utility model belongs to electronic circuit technology field, more particularly to a kind of that single supply power supply conversion is in pairs
The myoelectricity Acquisition Circuit that power supply is powered to component.
Background technique
Electromyography signal (EMG) is moving cell action potential (MUAP) over time and space folded in numerous muscle fibres
Add.Surface electromyogram signal (SEMG) is that electrical activity, can be one in the comprehensive effect of skin surface on superficial muscular EMG and nerve cord
Determine to reflect nervimuscular activity in degree；Relative to pin electrode EMG, SEMG has Noninvasive, hurtless measure, behaviour in measurement
Make the advantages that simple.Thus, SEMG clinical medicine, man-machine efficacy, medical science of recovery therapy and in terms of have weight
The practical value wanted.
Traditional myoelectricity Acquisition Circuit generally uses single supply to power, and causes to lack half electromyography signal feature；And it is traditional
Dual power supply myoelectricity Acquisition Circuit generally forms double power supply circuit by 2 power supplys, and power supply difference causes to introduce more interference
Signal is unfavorable for electromyographic signal collection extraction.Traditional myoelectricity Acquisition Circuit mostly uses greatly individual integrated amplifier as signal
Processing core chip is unfavorable for electromyographic signal collection since the factors such as temperature, wiring cause signal to generate bigger temperature drift effect
It extracts.
Utility model content
In view of the problems of the existing technology, the utility model proposes a kind of myoelectricity Acquisition Circuit, myoelectricity acquisition electricity
Road is using two paths of differential signals, all the way with reference to acquisition amplification muscle electric signal, and two-pass DINSAR distribution of electrodes is in reference electrode
Two sides, be in line distribution, and while acquiring electromyography signal, original electromyography signal is amplified.
To achieve the above objectives, the present invention adopts the following technical solutions:
Myoelectricity Acquisition Circuit, it includes that signal pickup circuit, trap circuit, signal follow circuit, high-pass filtering circuit, low
Bandpass filter circuit, power circuit and logical output circuit, the signal pickup circuit, trap circuit, signal follow circuit, high pass
Filter circuit, low-pass filter circuit and logical output circuit are sequentially connected, and the power circuit is connected to signal pickup circuit, letter
Number follow circuit and logical output circuit.
The technical program further optimizes, and power circuit includes the 14th capacitor C14, boost chip U3, the first inductance
L1, first diode D1, the 20th resistance R20, the 27th resistance R27, the tenth capacitor C10, the second diode D2, the three or two
Pole pipe D3, the 21st resistance R21, the 26th resistance R26, the 13rd capacitor C13 and the 16th capacitor C16, the boosting
The first inductance L1 is concatenated between the first pin and the 5th pin of chip U3, the 5th pin is connected with the 4th pin, the second pin
And the 4th concatenate the 14th capacitor C14 between pin, and the 27th resistance R27 is concatenated between third pin and the second pin, the
The anode of one diode D1 connects the first pin of boost chip U3, and cathode connects the third of boost chip U3 through the 20th resistance R20
Pin, the cathode of the tenth capacitor C10 mono- termination first diode D1, the second pin of another termination boost chip U3, the two or two
The cathode of pole pipe D2 connects first diode D1 cathode, and the anode of plus earth, third diode D3 connects the second of boost chip U3
Pin, cathode ground connection, the 21st resistance R21 and the 13rd capacitor C13 latter termination first diode D1 cathode in parallel, it is another
End ground connection, the second pin of the 26th resistance R26 and the 16th capacitor C16 latter termination boost chip U3 in parallel, the other end
Ground connection, the cathode of the first diode D1 are the end voltage VCC, and the second pin of boost chip U3 is the end voltage VEE.
The technical program further optimizes, and the signal pickup circuit includes first electrode J1, second electrode J2,
Three electrode J3, the 4th resistance R4, the 8th resistance R8, third capacitor C3, amplifier U1A, amplifier U1B, amplifier U1D, third
Resistance R3, the 5th resistance R5, the 9th resistance R9, first resistor R1, second resistance R2, twelfth resistor R12, the 15th resistance
R15, first capacitor C1 and the 5th capacitor C5, the first electrode J1 connect the first input of amplifier U1D by the 4th resistance R4
End, the second input terminal of amplifier U1D connect its output end through 3rd resistor R3, and the third electrode J3 connects through the 8th resistance R8 to be put
The first input end of big device U1B, the second input terminal connect its output end, the first input end of amplifier U1D through the 9th resistance R9
Third capacitor C3 is concatenated between the first input end of amplifier U1B, the second input terminal of amplifier U1D is with amplifier U1B's
The 5th resistance R5 is concatenated between second input terminal；The output end of amplifier U1D through first resistor R1 meet amplifier U1A it is second defeated
Enter end, the output end of amplifier U1B connects the first input end of amplifier U1A through twelfth resistor R12, and second electrode J2 is through the tenth
Five resistance R15 connect the first input end of amplifier U1A, and the second electricity is concatenated between the second input terminal and output end of amplifier U1A
R2 is hindered, the positive pole of amplifier U1A connects the end voltage VCC, and the power cathode of amplifier U1A meets the end voltage VEE, amplifier U1A
Positive pole be grounded through first capacitor C1, the power cathode of amplifier U1A is grounded through the 5th capacitor C5, and amplifier U1A's is defeated
Trap circuit is terminated out.
The technical program further optimizes, and the trap circuit includes the second capacitor C2, the 6th resistance R6, the 7th resistance
R7, the 6th capacitor C6, the 7th capacitor C7, amplifier U1C, the tenth resistance R10, eleventh resistor R11, thirteenth resistor R13,
14 resistance R14 and the 9th capacitor C9, the 6th resistance R6, the 7th resistance R7, the 7th capacitor C7, the 6th capacitor C6 successively go here and there
The output end of the public termination trap circuit of connection closed loop, the 6th resistance R6 and the 6th capacitor C6, the 6th resistance R6 and the 7th resistance
Common end the second capacitor C2 of R7 is grounded, and the first of the public termination amplifier U1C of the 7th resistance R7 and the 7th capacitor C7 is defeated
Enter to hold, the common end of the 6th capacitor C6 and the 7th capacitor C7 are successively through thirteenth resistor R13, eleventh resistor R11, the tenth resistance
R10 meets the second input terminal of amplifier U1C, the 9th capacitor C9 of common end and of the tenth resistance R10 and eleventh resistor R11
14 resistance R14 ground connection, the output termination signal of the amplifier U1C follow circuit.
The technical program further optimizes, and it includes amplifier U2A, the 4th capacitor C4 and that the signal, which follows circuit,
The output end of the second input termination trap circuit of eight capacitor C8, the amplifier U2A, first input end connect output end, amplify
The positive pole of device U2A connects the end voltage VCC, and power cathode connects the end voltage VEE, and the positive pole of amplifier U2A is through the 4th capacitor
C4 ground connection, the power cathode of amplifier U2A are grounded through the 8th capacitor C8, and the output of amplifier U2A terminates high-pass filtering circuit.
The technical program further optimizes, and the high-pass filtering circuit includes amplifier U2B, the 16th resistance R16,
17 resistance R17, the 11st capacitor C11, the 12nd capacitor C12, the 25th resistance R25 and the 28th resistance R28, it is described
The second input terminal of amplifier U1B is grounded through the 16th resistance R16, and the 17th resistance is concatenated between the second input terminal and output end
The first input end of R17, amplifier U1B are grounded through the 25th resistance R25, and signal follows that the output end of circuit is concatenated
11 capacitor C11 and the 12nd capacitor C12 connect the first input end of amplifier U2B, the 11st capacitor C11 and the 12nd capacitor
The 28th resistance R28 of common end of C12 connects the output end of amplifier U2B, the output termination low-pass filtering electricity of amplifier U2B
Road.
The technical program further optimizes, and the low-pass filter circuit includes the 18th resistance R18, the 19th resistance
R19, the 22nd resistance R22, the 23rd resistance R23, amplifier U2C, the 15th capacitor C15 and the 17th capacitor C17, institute
The first input end for stating amplifier U2C connects the output of high-pass filtering circuit through the 23rd resistance R23, the 22nd resistance R22
The 17th capacitor C17 of common end of end, the 23rd resistance R23 and the 22nd resistance R22 connect the output of amplifier U2C
End, the first output end of amplifier U2C are grounded through the 15th capacitor C15, and the second input terminal is grounded through the 18th resistance R18, the
The 19th resistance R19 is concatenated between two input terminals and output end, the output of amplifier U2C terminates logical output circuit.
The technical program further optimizes, and the logical output circuit includes the 4th diode D4, the 5th diode
D5, the 6th diode D6, the 7th diode D7, the 29th resistance R29, the 34th resistance R34, the 35th resistance R35,
31st resistance R31, the second triode Q2, the 36th resistance R36, the 32nd resistance R32, the first triode Q1,
33 resistance R33, the 37th resistance R37, amplifier U2D and the 30th resistance R30, the 5th diode D5 anode connect
The output end of low-pass filter circuit, cathode connect the base stage of the second triode Q2 through the 34th resistance R34, the second diode Q2's
Base stage is grounded through the 35th resistance R35 and the 18th capacitor C18 in parallel, and the 4th diode D4 cathode meets the 5th diode D5
Anode, anode connect the end voltage VCC through the 29th resistance R29, and the collector of the second triode Q2 connects through the 31st resistance R31
The end voltage VCC, the anode of the 6th diode D6 connect the 4th diode D4 anode, and cathode is grounded through the 7th diode D7, and the two or three
The emitter of pole pipe Q2 is connect with the emitter of the first triode Q1, and the base stage of the first triode Q1 connects the collection of the second triode Q2
The emitter of electrode, the first triode Q1 is grounded through the 36th resistance R36, and the collector of first diode Q1 is through the 32nd
Resistance R32 connects the end voltage VCC, the first input end of amplifier U2D through the 33rd resistance R33, that the 30th resistance R30 connects its is defeated
Outlet, the collector of second the first triode Q1 of input termination, the 33rd resistance R33 and the 30th public termination of resistance R30
The first input end at the end voltage VCC, amplifier U2D is grounded through the 37th resistance R37.
It is different from the prior art, above-mentioned technical proposal has the advantages that
1, the average voltage after upgrading is divided 3.7V boost in voltage to 5~30V, high voltage is myoelectricity by power circuit
The positive voltage of signal acquisition, power ground be electromyographic signal collection negative voltage, 12 high voltage be electromyographic signal collection power supply
Ground.
2, logical output circuit: when contraction of muscle, electromyography signal is in excitatory state, collects biggish electromyography signal；Flesh
When meat diastole, electromyography signal is in relaxed state, collects the electromyography signal of very little.By logic output par, c circuit, by myoelectricity
Signal pulse is converted into stable logic level, i.e. permanent High level or lasting low level.
3, while signal pickup circuit acquisition electromyography signal, original electromyography signal is amplified, amplification factor is adjustable,
100-2000 times.
Detailed description of the invention
Fig. 1 is the circuit diagram of myoelectricity Acquisition Circuit.
Specific embodiment
Technology contents, construction feature, the objects and the effects for detailed description technical solution, below in conjunction with specific reality
It applies example and attached drawing is cooperated to be explained in detail.
Myoelectricity Acquisition Circuit, it includes that signal pickup circuit, trap circuit, signal follow circuit, high-pass filtering circuit, low
Bandpass filter circuit, power circuit and logical output circuit, signal pickup circuit, trap circuit, signal follow circuit, high-pass filtering
Circuit, low-pass filter circuit and logical output circuit are sequentially connected, and power circuit is connected to signal pickup circuit, signal follows electricity
Road and logical output circuit.
Electromyography signal range 20-5000Hz, for main frequency in 20-1000Hz, electromyography signal amplitude is 100-2000uV, one
As be no more than 6mV.
Referring to Fig. 1, the circuit diagram of the utility model preferably embodiment.Power circuit includes the 14th capacitor
C14, boost chip U3, the first inductance L1, first diode D1, the 20th resistance R20, the 27th resistance R27, the tenth capacitor
C10, the second diode D2, third diode D3, the 21st resistance R21, the 26th resistance R26, the 13rd capacitor C13 and
The first inductance L1, the 5th pin and the 4th are concatenated between the first pin and the 5th pin of 16th capacitor C16, boost chip U3
Pin is connected, and the 14th capacitor C14 is concatenated between the second pin and the 4th pin, and the is concatenated between third pin and the second pin
27 resistance R27, the anode of first diode D1 connect the first pin of boost chip U3, and cathode connects through the 20th resistance R20
The third pin of boost chip U3, the tenth capacitor C10 mono- terminate the cathode of first diode D1, another termination boost chip U3's
Second pin, the cathode of the second diode D2 connect first diode D1 cathode, and the anode of plus earth, third diode D3 connects liter
Press the second pin of chip U3, cathode ground connection, the 21st resistance R21 and the 13rd capacitor C13 latter termination the one or two in parallel
Pole pipe D1 cathode, other end ground connection, the 26th resistance R26 and the 16th capacitor C16 latter termination boost chip U3's in parallel
Second pin, other end ground connection, the cathode of first diode D1 are the end voltage VCC, and the second pin of boost chip U3 is voltage
The end VEE.The Acquisition Circuit is powered using single supply, and by voltage up converting circuit, single supply power supply is converted into dual power supply to first device
Part power supply.The 5th pin of boost chip U3 meets input voltage 3.7V, and power boost circuit is by supply voltage to 5~30V, power supply
GND is the negative voltage of electromyographic signal collection, and high voltage is the high voltage of electromyographic signal collection, height after power boost after power boost
The 1/2 of voltage is the power ground of electromyographic signal collection.
It should be noted that power circuit is booster circuit, there are two types of types for booster circuit: integrated chip class and independent entry
Device class, the integrated chip class which uses, is formed using the integrated chips combination such as SX1308 diode, inductance, capacitor
Booster circuit, boost adjustable magnification.Skilled person will appreciate that independent component class also can be used in power circuit, such as can
The booster circuit formed with metal-oxide-semiconductor combination diode, inductance, capacitor, adjustable magnification.
Signal pickup circuit includes first electrode J1, second electrode J2, third electrode J3, the 4th resistance R4, the 8th resistance
R8, third capacitor C3, amplifier U1A, amplifier U1B, amplifier U1D, 3rd resistor R3, the 5th resistance R5, the 9th resistance R9,
First resistor R1, second resistance R2, twelfth resistor R12, the 15th resistance R15, first capacitor C1 and the 5th capacitor C5, first
Electrode J1 connects the first input end of amplifier U1D by the 4th resistance R4, and the second input terminal of amplifier U1D is through 3rd resistor R3
Its output end is connect, third electrode J3 connects the first input end of amplifier U1B through the 8th resistance R8, and the second input terminal is through the 9th electricity
Resistance R9 connects its output end, concatenates third capacitor between the first input end and the first input end of amplifier U1B of amplifier U1D
The 5th resistance R5 is concatenated between the second input terminal of C3, amplifier U1D and the second input terminal of amplifier U1B；Amplifier U1D's
Output end connects the second input terminal of amplifier U1A through first resistor R1, and the output end of amplifier U1B connects through twelfth resistor R12
The first input end of amplifier U1A, second electrode J2 connect the first input end of amplifier U1A, amplifier through the 15th resistance R15
Second resistance R2 is concatenated between the second input terminal and output end of U1A, the positive pole of amplifier U1A connects the end voltage VCC, amplification
The power cathode of device U1A connects the end voltage VEE, and the positive pole of amplifier U1A is grounded through first capacitor C1, the electricity of amplifier U1A
Source cathode is grounded through the 5th capacitor C5, and the output of amplifier U1A terminates trap circuit.Signal pickup circuit is believed using two-pass DINSAR
Number, all the way with reference to acquisition amplification muscle electric signal, and two-pass DINSAR distribution of electrodes, in the two sides of reference electrode, be in line distribution.
While acquiring electromyography signal, original electromyography signal is amplified, amplification factor is adjustable, and 100-2000 times.
Trap circuit includes the second capacitor C2, the 6th resistance R6, the 7th resistance R7, the 6th capacitor C6, the 7th capacitor C7, puts
Big device U1C, the tenth resistance R10, eleventh resistor R11, thirteenth resistor R13, the 14th resistance R14 and the 9th capacitor C9, the
Six resistance R6, the 7th resistance R7, the 7th capacitor C7, the 6th capacitor C6 are sequentially connected in series closed loop, the 6th resistance R6 and the 6th capacitor C6
Public termination trap circuit output end, common end the second capacitor C2 ground connection of the 6th resistance R6 and the 7th resistance R7, the
The first input end of the public termination amplifier U1C of seven resistance R7 and the 7th capacitor C7, the 6th capacitor C6 and the 7th capacitor C7's
Common end successively connects the second input terminal of amplifier U1C through thirteenth resistor R13, eleventh resistor R11, the tenth resistance R10, the
Common end the 9th capacitor C9 and the 14th resistance R14 of ten resistance R10 and eleventh resistor R11 is grounded, and amplifier U1C's is defeated
Termination signal follows circuit out.Trap circuit uses double-T shaped 50Hz trapper, filters out 50Hz Hz noise.
It includes amplifier U2A, the 4th capacitor C4 and the 8th capacitor C8, the second input of amplifier U2A that signal, which follows circuit,
The output end of trap circuit is terminated, first input end connects output end, and the positive pole of amplifier U2A connects the end voltage VCC, and power supply is negative
Pole connects the end voltage VEE, and the positive pole of amplifier U2A is grounded through the 4th capacitor C4, and the power cathode of amplifier U2A is through the 8th electricity
Hold C8 ground connection, the output of amplifier U2A terminates high-pass filtering circuit.Signal follows circuit follower to keep the muscle telecommunications picked up
It number is not disturbed, and keeps amplified muscle electrical signal intensity.
High-pass filtering circuit include amplifier U2B, the 16th resistance R16, the 17th resistance R17, the 11st capacitor C11,
12nd capacitor C12, the 25th resistance R25 and the 28th resistance R28, the second input terminal of amplifier U1B is through the 16th
Resistance R16 ground connection, concatenates the 17th resistance R17 between the second input terminal and output end, the first input end of amplifier U1B is through the
25 resistance R25 ground connection, the 11st capacitor C11 and the 12nd capacitor C12 that signal follows the output end of circuit to be concatenated connect
The 28th resistance R28 of common end of the first input end of amplifier U2B, the 11st capacitor C11 and the 12nd capacitor C12 connect
The output of the output end of amplifier U2B, amplifier U2B terminates low-pass filter circuit.High-pass filtering circuit is for filtering out in signal
Lower than the signal of the part 20Hz.
Low-pass filter circuit includes the 18th resistance R18, the 19th resistance R19, the 22nd resistance R22, the 23rd
Resistance R23, amplifier U2C, the 15th capacitor C15 and the 17th capacitor C17, the first input end of amplifier U2C is through the 20th
Three resistance R23, the 22nd resistance R22 connect the output end of high-pass filtering circuit, the 23rd resistance R23 and the 22nd resistance
The 17th capacitor C17 of common end of R22 connects the output end of amplifier U2C, and the first output end of amplifier U2C is through the 15th electricity
Hold C15 ground connection, the second input terminal is grounded through the 18th resistance R18, and the 19th resistance is concatenated between the second input terminal and output end
The output of R19, amplifier U2C terminate logical output circuit.Low-pass filter circuit filters out the letter for being higher than the part 1000Hz in signal
Number.
Logical output circuit include the 4th diode D4, the 5th diode D5, the 6th diode D6, the 7th diode D7,
29th resistance R29, the 34th resistance R34, the 35th resistance R35, the 31st resistance R31, the second triode Q2,
36th resistance R36, the 32nd resistance R32, the first triode Q1, the 33rd resistance R33, the 37th resistance R37,
Amplifier U2D and the 30th resistance R30, the 5th diode D5 anode connect the output end of low-pass filter circuit, and cathode is through the 30th
Four resistance R34s connect the base stage of the second triode Q2, and the base stage of the second diode Q2 is through the 35th resistance R35 and the tenth in parallel
Eight capacitor C18 ground connection, the 4th diode D4 cathode connect the 5th diode D5 anode, and anode connects voltage through the 29th resistance R29
The collector at the end VCC, the second triode Q2 connects the end voltage VCC through the 31st resistance R31, and the anode of the 6th diode D6 connects
Four diode D4 anodes, cathode are grounded through the 7th diode D7, the hair of the emitter of the second triode Q2 and the first triode Q1
Emitter-base bandgap grading connection, the base stage of the first triode Q1 connect the collector of the second triode Q2, and the emitter of the first triode Q1 is through third
16 resistance R36 ground connection, the collector of first diode Q1 connect the end voltage VCC through the 32nd resistance R32, amplifier U2D's
First input end meets its output end, second the first triode Q1 of input termination through the 33rd resistance R33, the 30th resistance R30
Collector, the 33rd resistance R33 and the end the 30th resistance R30 public termination voltage VCC, the first input of amplifier U2D
End is grounded through the 37th resistance R37.Logical output circuit will amplify filtered muscle electric signal and be converted into logic control letter
Number (high and low), to drive electrical stimulation apparatus.When contraction of muscle, electromyography signal is in excitatory state, collects biggish myoelectricity
Signal；When muscle diastole, electromyography signal is in relaxed state, collects the electromyography signal of very little.By logic output par, c circuit,
Convert electromyography signal pulse to stable logic level, i.e. permanent High level or lasting low level.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or the terminal device that include a series of elements not only include those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or end
The intrinsic element of end equipment.In the absence of more restrictions, being limited by sentence " including ... " or " including ... "
Element, it is not excluded that there is also other elements in process, method, article or the terminal device for including the element.This
Outside, herein, " being greater than ", " being less than ", " being more than " etc. are interpreted as not including this number；" more than ", " following ", " within " etc. understand
Being includes this number.
Although the various embodiments described above are described, once a person skilled in the art knows basic wounds
The property made concept, then additional changes and modifications can be made to these embodiments, so the foregoing is merely the realities of the utility model
Example is applied, the scope of patent protection of the utility model is not intended to limit, it is all to utilize the utility model specification and accompanying drawing content
Made equivalent structure or equivalent flow shift, is applied directly or indirectly in other relevant technical fields, and similarly includes
Within the scope of patent protection of the utility model.
Claims (8)
1. myoelectricity Acquisition Circuit, which is characterized in that it includes that signal pickup circuit, trap circuit, signal follow circuit, high pass filter
Wave circuit, low-pass filter circuit, power circuit and logical output circuit, the signal pickup circuit, trap circuit, signal follow
Circuit, high-pass filtering circuit, low-pass filter circuit and logical output circuit are sequentially connected, and the power circuit is connected to signal and picks up
Sense circuit, signal follow circuit and logical output circuit.
2. myoelectricity Acquisition Circuit as described in claim 1, which is characterized in that the power circuit include the 14th capacitor C14,
Boost chip U3, the first inductance L1, first diode D1, the 20th resistance R20, the 27th resistance R27, the tenth capacitor C10,
Second diode D2, third diode D3, the 21st resistance R21, the 26th resistance R26, the 13rd capacitor C13 and the tenth
The first inductance L1, the 5th pin and the 4th are concatenated between the first pin and the 5th pin of six capacitor C16, the boost chip U3
Pin is connected, and the 14th capacitor C14 is concatenated between the second pin and the 4th pin, and the is concatenated between third pin and the second pin
27 resistance R27, the anode of first diode D1 connect the first pin of boost chip U3, and cathode connects through the 20th resistance R20
The third pin of boost chip U3, the tenth capacitor C10 mono- terminate the cathode of first diode D1, another termination boost chip U3's
Second pin, the cathode of the second diode D2 connect first diode D1 cathode, and the anode of plus earth, third diode D3 connects liter
Press the second pin of chip U3, cathode ground connection, the 21st resistance R21 and the 13rd capacitor C13 latter termination the one or two in parallel
Pole pipe D1 cathode, other end ground connection, the 26th resistance R26 and the 16th capacitor C16 latter termination boost chip U3's in parallel
The cathode of second pin, other end ground connection, the first diode D1 is the end voltage VCC, and the second pin of boost chip U3 is
The end voltage VEE.
3. myoelectricity Acquisition Circuit as claimed in claim 2, which is characterized in that the signal pickup circuit includes first electrode
J1, second electrode J2, third electrode J3, the 4th resistance R4, the 8th resistance R8, third capacitor C3, amplifier U1A, amplifier
U1B, amplifier U1D, 3rd resistor R3, the 5th resistance R5, the 9th resistance R9, first resistor R1, second resistance R2, the 12nd electricity
Resistance R12, the 15th resistance R15, first capacitor C1 and the 5th capacitor C5, the first electrode J1 connect amplification by the 4th resistance R4
Second input terminal of the first input end of device U1D, amplifier U1D meets its output end, the third electrode J3 through 3rd resistor R3
The first input end of amplifier U1B is connect through the 8th resistance R8, the second input terminal connects its output end, amplifier through the 9th resistance R9
Third capacitor C3, the second input of amplifier U1D are concatenated between the first input end of U1D and the first input end of amplifier U1B
The 5th resistance R5 is concatenated between end and the second input terminal of amplifier U1B；The output end of amplifier U1D connects through first resistor R1 and puts
The second input terminal of big device U1A, the output end of amplifier U1B connect the first input end of amplifier U1A through twelfth resistor R12,
Second electrode J2 connects the first input end of amplifier U1A, the second input terminal of amplifier U1A and output through the 15th resistance R15
Second resistance R2 is concatenated between end, the positive pole of amplifier U1A connects the end voltage VCC, and the power cathode of amplifier U1A connects voltage
The positive pole at the end VEE, amplifier U1A is grounded through first capacitor C1, and the power cathode of amplifier U1A connects through the 5th capacitor C5
The output on ground, amplifier U1A terminates trap circuit.
4. myoelectricity Acquisition Circuit as described in claim 1, which is characterized in that the trap circuit includes the second capacitor C2, the
Six resistance R6, the 7th resistance R7, the 6th capacitor C6, the 7th capacitor C7, amplifier U1C, the tenth resistance R10, eleventh resistor
R11, thirteenth resistor R13, the 14th resistance R14 and the 9th capacitor C9, the 6th resistance R6, the 7th resistance R7, the 7th electricity
Hold C7, the 6th capacitor C6 and is sequentially connected in series closed loop, the output end of the public termination trap circuit of the 6th resistance R6 and the 6th capacitor C6,
Common end the second capacitor C2 of 6th resistance R6 and the 7th resistance R7 is grounded, the common end of the 7th resistance R7 and the 7th capacitor C7
Connect the first input end of amplifier U1C, the common end of the 6th capacitor C6 and the 7th capacitor C7 are successively through thirteenth resistor R13,
11 resistance R11, the tenth resistance R10 connect the second input terminal of amplifier U1C, the public affairs of the tenth resistance R10 and eleventh resistor R11
End is grounded through the 9th capacitor C9 and the 14th resistance R14 altogether, and the output termination signal of the amplifier U1C follows circuit.
5. myoelectricity Acquisition Circuit as claimed in claim 2, which is characterized in that the signal follow circuit include amplifier U2A,
The output end of the second input termination trap circuit of 4th capacitor C4 and the 8th capacitor C8, the amplifier U2A, first input end
Output end is connect, the positive pole of amplifier U2A connects the end voltage VCC, and power cathode connects the end voltage VEE, and the power supply of amplifier U2A is just
The 4th capacitor C4 of pole ground connection, the power cathode of amplifier U2A are grounded through the 8th capacitor C8, and the output of amplifier U2A terminates high
Bandpass filter circuit.
6. myoelectricity Acquisition Circuit as described in claim 1, which is characterized in that the high-pass filtering circuit include amplifier U2B,
16th resistance R16, the 17th resistance R17, the 11st capacitor C11, the 12nd capacitor C12, the 25th resistance R25 and second
18 resistance R28, the second input terminal of the amplifier U1B are grounded through the 16th resistance R16, the second input terminal and output end it
Between concatenate the 17th resistance R17, the first input end of amplifier U1B is grounded through the 25th resistance R25, and signal follows circuit
The 11st capacitor C11 and the 12nd capacitor C12 that output end is concatenated connect the first input end of amplifier U2B, the 11st capacitor
The 28th resistance R28 of common end of C11 and the 12nd capacitor C12 connects the output end of amplifier U2B, and amplifier U2B's is defeated
Low-pass filter circuit is terminated out.
7. myoelectricity Acquisition Circuit as described in claim 1, which is characterized in that the low-pass filter circuit includes the 18th resistance
R18, the 19th resistance R19, the 22nd resistance R22, the 23rd resistance R23, amplifier U2C, the 15th capacitor C15 and
17 capacitor C17, the first input end of the amplifier U2C connect high pass through the 23rd resistance R23, the 22nd resistance R22
The 17th capacitor C17 of common end of the output end of filter circuit, the 23rd resistance R23 and the 22nd resistance R22, which connect, to be put
The output end of big device U2C, the first output end of amplifier U2C are grounded through the 15th capacitor C15, and the second input terminal is through the 18th electricity
R18 ground connection is hindered, the 19th resistance R19, the output terminating logic output of amplifier U2C are concatenated between the second input terminal and output end
Circuit.
8. myoelectricity Acquisition Circuit as claimed in claim 2, which is characterized in that the logical output circuit includes the 4th diode
D4, the 5th diode D5, the 6th diode D6, the 7th diode D7, the 29th resistance R29, the 34th resistance R34,
35 resistance R35, the 31st resistance R31, the second triode Q2, the 36th resistance R36, the 32nd resistance R32,
One triode Q1, the 33rd resistance R33, the 37th resistance R37, amplifier U2D and the 30th resistance R30, the described 5th
Diode D5 anode connects the output end of low-pass filter circuit, and cathode connects the base stage of the second triode Q2 through the 34th resistance R34,
The base stage of second diode Q2 is grounded through the 35th resistance R35 and the 18th capacitor C18 in parallel, the 4th diode D4 cathode
Connect the 5th diode D5 anode, anode connects the end voltage VCC through the 29th resistance R29, and the collector of the second triode Q2 is through the
31 resistance R31 connect the end voltage VCC, and the anode of the 6th diode D6 connects the 4th diode D4 anode, and cathode is through the seven or two pole
Pipe D7 ground connection, the emitter of the second triode Q2 are connect with the emitter of the first triode Q1, and the base stage of the first triode Q1 connects
The emitter of the collector of second triode Q2, the first triode Q1 is grounded through the 36th resistance R36, first diode Q1's
Collector connects the end voltage VCC through the 32nd resistance R32, and the first input end of amplifier U2D is through the 33rd resistance R33,
30 resistance R30 connect its output end, the collector of second the first triode Q1 of input termination, the 33rd resistance R33 and third
The end ten resistance R30 public termination voltage VCC, the first input end of amplifier U2D are grounded through the 37th resistance R37.
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| CN112617866A (en) * | 2020-12-31 | 2021-04-09 | 深圳美格尔生物医疗集团有限公司 | EMG (electromagnetic EMG) electromyographic signal digital acquisition circuit and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112617866A (en) * | 2020-12-31 | 2021-04-09 | 深圳美格尔生物医疗集团有限公司 | EMG (electromagnetic EMG) electromyographic signal digital acquisition circuit and system |
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