CN206261586U - Electromyographic signal collection circuit and Wearable device - Google Patents
Electromyographic signal collection circuit and Wearable device Download PDFInfo
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- CN206261586U CN206261586U CN201620767952.0U CN201620767952U CN206261586U CN 206261586 U CN206261586 U CN 206261586U CN 201620767952 U CN201620767952 U CN 201620767952U CN 206261586 U CN206261586 U CN 206261586U
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Abstract
The utility model proposes a kind of electromyographic signal collection circuit and Wearable device.The electromyographic signal collection circuit includes signal amplification circuit (21), rectification circuit (22), filter circuit (23) and variable-gain amplification circuit (24)；Wherein, the signal amplification circuit (21), the rectification circuit (22), the filter circuit (23) and the variable-gain amplification circuit (24) are sequentially connected electrically；The signal amplification circuit (21) also electrically connects the myoelectric sensor (30) positioned at electromyographic signal collection circuit (20) front end, and the variable-gain amplification circuit (24) also electrically connects the muscle electrical signal process circuit (40) positioned at electromyographic signal collection circuit (20) rear end.By removing prefilter, setting signal amplifying circuit and rectification circuit realize the reduction of electromyographic signal collection circuit noise interference to the utility model, for the application of the Wearable device set based on electromyographic signal provides wide prospect.
Description
Technical field
The utility model is related to technical field of integrated circuits, more particularly to a kind of electromyographic signal collection circuit and and wearable
Formula equipment.
Background technology
Wearable device, is based especially on the Wearable device of muscle electric signal principle, gradually by public concern
And receiving.Muscle electric signal experienced the development of last 100 yearses since control field is applied to, and is studied is applied to doctor always
Learn diagnosis and bio-mechanical field.With biomedical technology, the development of artificial intelligence technology, gesture is carried out using electromyographic signal
Know method for distinguishing to be suggested and constantly explore, the research to electromyographic signal collection also becomes of crucial importance.
In general, myoelectricity bio signal is ac voltage signal, and signal intensity is generally millivolt level and more very receives volt level,
But due to inherently one good conductor of human body, extraneous Hz noise and external electric field, magnetic field induction all can be in human body
Form measurement noise interference and the detection of influence myoelectric information.Refer to Fig. 1, Fig. 1 for prior art electromyographic signal collection with
The electrical block diagram of processing system.Before the electromyographic signal collection includes myoelectric sensor 11, low noise with processing system 10
Put amplifier 12, high-pass filter 13, rearmounted amplifying circuit 14, low-pass filter circuit 15, true rms circuit 16 and AD conversion electricity
Road 17.
Because low-noise preamplifier 12 is easily introduced noise very much, and high-pass filter 13 can also introduce noise, in addition, flesh
Electric transducer 11 is generally connected with low-noise preamplifier 12 using wire, can be highly susceptible to external interference and be caused signal
Noise is brought in transmitting procedure.
Utility model content
Therefore, it is readily incorporated noise when being acquired to electromyographic signal for solution electromyographic signal collection circuit and causes myoelectricity
The problem that acquisition precision declines, the utility model proposes a kind of electromyographic signal collection circuit and Wearable device.
Specifically, a kind of electromyographic signal collection circuit (20) that the utility model embodiment is proposed, including signal amplifies electricity
Road (21), rectification circuit (22), filter circuit (23) and variable-gain amplification circuit (24)；Wherein,
The signal amplification circuit (21), the rectification circuit (22), the filter circuit (23) and the variable gain
Amplifying circuit (24) is sequentially connected electrically；The signal amplification circuit (21) is also electrically connected positioned at the electromyographic signal collection circuit
(20) myoelectric sensor (30) of front end, the variable-gain amplification circuit (24) is also electrically connected positioned at the electromyographic signal collection
The muscle electrical signal process circuit (40) of circuit (20) rear end.
In one embodiment of the present utility model, the signal amplification circuit (21) is AD8211 chips.
In one embodiment of the present utility model, the rectification circuit (22) includes first resistor (R1), second resistance
(R2), 3rd resistor (R3), the 4th resistance (R4), the 5th resistance (R5), the first electric capacity (C1), first comparator (COMP1),
Two comparators (COMP2), first switch pipe (D1) and second switch pipe (D2)；Wherein,
First electric capacity (C1), the first resistor (R1), the second resistance (R2), the 3rd resistor (R3) and
4th resistance (R4) is serially connected between the signal amplification circuit (21) and the filter circuit (23)；The first switch
The two of the second resistance (R2) is electrically connected to after pipe (D1), the second switch pipe (D2) and the 5th resistance (R5) concatenation
End；
The first input end of the first comparator (COMP1) is electrically connected to earth terminal (GND), the electrical connection of the second input
At to the first resistor (R1) and the node of the second resistance (R2) concatenation formation and its output end is electrically connected to described the
At the node that one switching tube (D1) and the second switch pipe (D2) concatenation are formed；
The first input end of second comparator (COMP2) is electrically connected to the second switch pipe (D2) and described
At the node that 5th resistance (R5) concatenation is formed, the second input is electrically connected to the 3rd resistor (R3) and the 4th resistance
(R4) concatenate at the node for being formed and its output end is electrically connected to the filter circuit (23).
In one embodiment of the present utility model, the filter circuit (23) includes the 6th resistance (R6), the 7th resistance
(R7), the second electric capacity (C2) and the 3rd comparator (COMP3)；Wherein, the 6th resistance (R6) and the 7th resistance (R7)
It is serially connected between the rectification circuit (22) and the variable-gain amplification circuit (24)；Second electric capacity (C2) is electrically connected to
The two ends of the 7th resistance (R7)；The first input end of the 3rd comparator (COMP3) electrically connects earth terminal (GND), the
Two inputs are electrically connected at the node that the 6th resistance (R6) and the 7th resistance (R7) concatenation are formed and its output end
It is electrically connected to the variable-gain amplification circuit (24).
In one embodiment of the present utility model, the variable-gain amplification circuit (24) including the 8th resistance (R8),
9th swept resistance (R9) and the 4th comparator (COMP4)；8th resistance (R8) and the 9th swept resistance (R9) are gone here and there
It is connected between the filter circuit (23) and the true rms circuit (26)；The first of 4th comparator (COMP4)
Input electrically connects earth terminal (GND), and the second input is electrically connected to the 8th resistance (R8) and the 9th swept resistance
(R9) concatenate at the node for being formed and its output end is electrically connected to the muscle electrical signal process circuit (40).
A kind of Wearable device that another embodiment of the utility model is proposed, is worn at human body privileged site, including
Multiple electromyographic signal collections unit (a) and flexible connecting material (b), the flexible connecting material (b) are used to connect the myoelectricity
Signal gathering unit (a) is forming cyclic structure；Wherein, electromyographic signal collection unit (a) include myoelectric sensor (30),
Electromyographic signal collection circuit (20) described in muscle electrical signal process circuit (40) and above-described embodiment.
In one embodiment of the present utility model, the myoelectric sensor (30) is using 1Cr12 materials as electrode slice.
In one embodiment of the present utility model, the myoelectric sensor (30) is welded on the carrying electromyographic signal and adopts
Electrically connected with the signal amplification circuit (21) on the circuit board (25) of collector (20) and by circuit board micropore.
In one embodiment of the present utility model, the myoelectric sensor (30) includes two first electrodes (31) and
Individual second electrode (32), the second electrode is located between two first electrodes and the size of the second electrode is less than institute
State the size of first electrode.
In one embodiment of the present utility model, the muscle electrical signal process circuit (40) includes true rms circuit (41)
With A/D converter circuit (42)；The true rms circuit (41) is electrically connected the A/D converter circuit (42) and described variable
Gain amplifying circuit (24).
Embodiment of the present utility model, relative to prior art, possesses following advantage：
1st, remove prefilter, reduce the noise of prefilter introducing；
2nd, solved using novel signal acquisition mode and AD8221 circuits and reduce the interference that noise causes to signal；
3rd, rectification is carried out to electromyographic signal using rectification circuit and improves signal utilization rate；
4th, using variable-gain amplification circuit, improve the scope of application of system；
5th, volume reduces, easily miniaturization, integrated；
6th, AgCl electrode slices are solved for consumptive material, using expensive and be unable to the shortcoming of secondary recovery；
7th, transmission line is replaced by circuit board micro-aperture technique, reduces outer bound pair signal and interfere.
By the detailed description below with reference to accompanying drawing, other side of the present utility model and feature become obvious.But should
When knowing, the accompanying drawing is only the purpose design explained, not as the restriction of scope of the present utility model.Should also know
Road, unless otherwise noted, it is not necessary to scale accompanying drawing, they only try hard to conceptually illustrate structure described herein and stream
Journey.
Brief description of the drawings
Below in conjunction with accompanying drawing, specific embodiment of the present utility model is described in detail.
Fig. 1 is the electromyographic signal collection of prior art and the electrical block diagram of processing system；
A kind of electrical block diagram of electromyographic signal collection circuit that Fig. 2 is provided for the utility model embodiment；
A kind of structural representation of Wearable device that Fig. 3 is provided for the utility model embodiment；
A kind of electrical block diagram of rectification circuit that Fig. 4 is provided for the utility model embodiment；
A kind of electrical block diagram of filter circuit that Fig. 5 is provided for the utility model embodiment；
A kind of electrical block diagram of variable-gain amplification circuit that Fig. 6 is provided for the utility model embodiment；And
A kind of structural representation of myoelectricity collection sensor that Fig. 7 is provided for the utility model embodiment.
Specific embodiment
To enable above-mentioned purpose of the present utility model, feature and advantage more obvious understandable, below in conjunction with the accompanying drawings to this
The specific embodiment of utility model is described in detail.
A kind of electromyographic signal collection circuit provided for the utility model embodiment please also refer to Fig. 2 and Fig. 3, Fig. 2
Electrical block diagram；A kind of structural representation of Wearable device that figure is provided for the utility model embodiment.The circuit
Can apply to be carried out by the way of electromyographic signal collection the Wearable device of man-machine interaction, the equipment can be worn on people
At body privileged site, such as arm or leg muscle group compare the position of concentration；The Wearable device includes multiple myoelectricity letters
Number collecting unit (a) and flexible connecting material (b), the flexible connecting material (b) are used to connect the electromyographic signal collection list
First (a) is forming cyclic structure；Wherein, electromyographic signal collection unit (a) is included at myoelectric sensor (30), electromyographic signal
Reason circuit (40) and electromyographic signal collection circuit (20).
Specifically, the electromyographic signal collection circuit (20) includes signal amplification circuit (21), rectification circuit (22), filtered electrical
Road (23) and variable-gain amplification circuit (24)；Wherein, the signal amplification circuit (21), the rectification circuit (22), described
Filter circuit (23) and the variable-gain amplification circuit (24) are sequentially connected electrically；The signal amplification circuit (21) also electrically connects
Positioned at the myoelectric sensor (30) of electromyographic signal collection circuit (20) front end, the variable-gain amplification circuit (24) also electricity
Muscle electrical signal process circuit (40) of the connection positioned at electromyographic signal collection circuit (20) rear end.
The present embodiment, by removing prefilter, setting signal amplifying circuit and rectification circuit realize that electromyographic signal is adopted
The reduction of collector noise jamming, for the Wearable device application set based on electromyographic signal provides wide prospect.
Embodiment two
Please also refer to Fig. 4-Fig. 6, Fig. 4 shows for a kind of circuit structure of rectification circuit that the utility model embodiment is provided
It is intended to；A kind of electrical block diagram of filter circuit that Fig. 5 is provided for the utility model embodiment；Fig. 6 is the utility model
A kind of electrical block diagram of variable-gain amplification circuit that embodiment is provided.The present embodiment is on the basis of above-described embodiment
On, electromyographic signal collection circuit of the present utility model will be described in detail.
Specifically, the signal amplification circuit (21) is AD8211 chips.Original myoelectricity is realized by AD8221 chips
The collection of signal and the primary influence of noise amplified, effectively solve transmission line and prefilter introducing.
Specifically, the rectification circuit (22) includes first resistor (R1), second resistance (R2), 3rd resistor (R3),
Four resistance (R4), the 5th resistance (R5), the first electric capacity (C1), first comparator (COMP1), the second comparator (COMP2), first
Switching tube (D1) and second switch pipe (D2)；Wherein, first electric capacity (C1), the first resistor (R1), second electricity
Resistance (R2), the 3rd resistor (R3) and the 4th resistance (R4) are serially connected with the signal amplification circuit (21) and the filtering
Between circuit (23)；Electricity after the first switch pipe (D1), the second switch pipe (D2) and the 5th resistance (R5) concatenation
It is connected to the two ends of the second resistance (R2)；The first input end of the first comparator (COMP1) is electrically connected to earth terminal
(GND), the second input be electrically connected to the first resistor (R1) and the second resistance (R2) concatenation formed node at and
Its output end is electrically connected at the node that the first switch pipe (D1) and the second switch pipe (D2) concatenation are formed；It is described
The first input end of the second comparator (COMP2) is electrically connected to the second switch pipe (D2) and the 5th resistance (R5)
Concatenate at the node for being formed, the second input is electrically connected to the 3rd resistor (R3) and the 4th resistance (R4) concatenation is formed
Node at and its output end is electrically connected to the filter circuit (23).Using the rectification circuit (22) to the flesh after amplification
Electric signal carries out rectification, improves signal utilization rate.
Specifically, the filter circuit (23) includes the 6th resistance (R6), the 7th resistance (R7), the second electric capacity (C2) and
Three comparators (COMP3)；Wherein, the 6th resistance (R6) and the 7th resistance (R7) are serially connected with the rectification circuit (22)
And the variable-gain amplification circuit (24) between；Second electric capacity (C2) is electrically connected to the two of the 7th resistance (R7)
End；The first input end of the 3rd comparator (COMP3) electrically connects earth terminal (GND), and the second input is electrically connected to described
6th resistance (R6) and the 7th resistance (R7) concatenation formed node at and its output end is electrically connected to the variable gain
Amplifying circuit (24).Signal after rectification can be carried out by signal filtering, making an uproar in removal signal using the filter circuit (23)
Sound shadow is rung.
Specifically, the variable-gain amplification circuit (24) includes the 8th resistance (R8), the 9th swept resistance (R9) and
Four comparators (COMP4)；8th resistance (R8) and the 9th swept resistance (R9) are serially connected with the filter circuit
(23) and the true rms circuit (26) between；The first input end electrical connection earth terminal of the 4th comparator (COMP4)
(GND), the second input is electrically connected to the node that the 8th resistance (R8) and the 9th swept resistance (R9) concatenation are formed
Place and its output end is electrically connected to the muscle electrical signal process circuit (40).Due to the individual sex differernce of people, muscle property etc. is all
It is different that many reasons cause that the amplitude characteristic of electromyographic signal is present, and electromyographic signal is extracted in order to preferably amplify, variable using this
Gain amplifying circuit structure, according to actual needs for individual otherness Design enlargement multiple.
Embodiment three
Refer to Fig. 7, a kind of structural representation of myoelectricity collection sensor that Fig. 7 is provided for the utility model embodiment.
The myoelectric sensor (30) includes two first electrodes (31) and a second electrode (32), is welded in the carrying flesh
It is electrically connected with the signal amplification circuit (21) on the circuit board (25) of signal acquisition circuit (20) and by circuit board micropore
Connect.Wherein, the second electrode is located between two first electrodes and the size of the second electrode is less than described first
The size of electrode.
For the selection of the electrode material, prior art generally uses AgCl materials, and AgCl electrode slices are consumptive material, are used
It is expensive and be unable to secondary recovery, therefore, the utility model is using 1Cr12 materials as electrode slice.Due to 1Cr12 materials by
The chemical substances such as carbon, manganese, chromium, nickel are constituted, typically a kind of for turbine blade and the stainless refractory steel of high stress part, are resisted
Tensile strength is big, and recycling advantage.In addition, by contrasting medical electrocardioelectrode monolithic, medical electrocardioelectrode, A, B
The contrast of the materials such as electrode, data acquisition effect is best under 1Cr12 material equal conditions.
The present embodiment, myoelectric sensor and electromyographic signal collection are completed using blind holes of circuit board and hole filling technology substitution wire
The connection of circuit, greatly reduces outer bound pair signal and interferes.In addition, electrode uses 1Cr12 novel nano-materials, can be effective
The price of reduction myoelectric sensor is simultaneously reusable.
In sum, the electromyographic signal collection circuit and Wearable device that the utility model embodiment is proposed can be reached
One or more beneficial effects below：1) remove prefilter, reduce the noise of prefilter introducing；2) using new
Signal acquisition mode and AD8221 circuits are solved and reduce the interference that noise causes to signal；3) myoelectricity is believed using rectification circuit
Number carry out rectification and improve signal utilization rate；4) variable-gain amplification circuit is used, the scope of application of system is improve；5) volume subtracts
Small, easily miniaturization is integrated；6) AgCl electrode slices are solved for consumptive material, using expensive and be unable to the shortcoming of secondary recovery；
7) transmission line is replaced by circuit board micro-aperture technique, reduces outer bound pair signal and interfere.
The above, is only preferred embodiment of the present utility model, not makees any formal to the utility model
Limitation, although the utility model is disclosed above with preferred embodiment, but is not limited to the utility model, any ripe
Professional and technical personnel is known, is not being departed from the range of technical solutions of the utility model, when in the technology using the disclosure above
Appearance is made a little change or is modified to the Equivalent embodiments of equivalent variations, as long as being without departing from technical solutions of the utility model
Hold, any simple modification, equivalent variations and the modification made to above example according to technical spirit of the present utility model, still
Belong in the range of technical solutions of the utility model.
Claims (10)
1. a kind of electromyographic signal collection circuit (20), it is characterised in that including signal amplification circuit (21), rectification circuit (22),
Filter circuit (23) and variable-gain amplification circuit (24)；Wherein,
The signal amplification circuit (21), the rectification circuit (22), the filter circuit (23) and the variable gain are amplified
Circuit (24) is sequentially connected electrically；The signal amplification circuit (21) is also electrically connected before the electromyographic signal collection circuit (20)
The myoelectric sensor (30) at end, the variable-gain amplification circuit (24) is also electrically connected positioned at the electromyographic signal collection circuit
(20) muscle electrical signal process circuit (40) of rear end.
2. circuit (20) as claimed in claim 1, it is characterised in that the signal amplification circuit (21) is AD8211 chips.
3. circuit (20) as claimed in claim 1, it is characterised in that the rectification circuit (22) including first resistor (R1),
Second resistance (R2), 3rd resistor (R3), the 4th resistance (R4), the 5th resistance (R5), the first electric capacity (C1), first comparator
(COMP1), the second comparator (COMP2), first switch pipe (D1) and second switch pipe (D2)；Wherein,
First electric capacity (C1), the first resistor (R1), the second resistance (R2), the 3rd resistor (R3) and described
4th resistance (R4) is serially connected between the signal amplification circuit (21) and the filter circuit (23)；The first switch pipe
(D1), it is electrically connected to the two of the second resistance (R2) after the second switch pipe (D2) and the 5th resistance (R5) concatenation
End；
The first input end of the first comparator (COMP1) is electrically connected to earth terminal (GND), and the second input is electrically connected to institute
State at the node that first resistor (R1) and the second resistance (R2) concatenation are formed and its output end is electrically connected to described first and opens
Close at the node that pipe (D1) and the second switch pipe (D2) concatenation are formed；
The first input end of second comparator (COMP2) is electrically connected to the second switch pipe (D2) and the 5th resistance
(R5) at the node that concatenation is formed, the second input is electrically connected to the 3rd resistor (R3) and the 4th resistance (R4) concatenation
At the node of formation and its output end is electrically connected to the filter circuit (23).
4. circuit (20) as claimed in claim 1, it is characterised in that the filter circuit (23) including the 6th resistance (R6),
7th resistance (R7), the second electric capacity (C2) and the 3rd comparator (COMP3)；Wherein, the 6th resistance (R6) and the described 7th
Resistance (R7) is serially connected between the rectification circuit (22) and the variable-gain amplification circuit (24)；Second electric capacity (C2)
It is electrically connected to the two ends of the 7th resistance (R7)；The first input end electrical connection earth terminal of the 3rd comparator (COMP3)
(GND), the second input be electrically connected to the 6th resistance (R6) and the 7th resistance (R7) concatenation formed node at and
Its output end is electrically connected to the variable-gain amplification circuit (24).
5. circuit (20) as claimed in claim 1, it is characterised in that the variable-gain amplification circuit (24) includes the 8th electricity
Resistance (R8), the 9th swept resistance (R9) and the 4th comparator (COMP4)；8th resistance (R8) and the 9th swept resistance
(R9) it is serially connected between the filter circuit (23) and the true rms circuit (41) of the muscle electrical signal process circuit (40)；It is described
The first input end of the 4th comparator (COMP4) electrically connects earth terminal (GND), and the second input is electrically connected to the 8th resistance
(R8) and at the node that is formed of the 9th swept resistance (R9) concatenation and its output end is electrically connected to electromyographic signal treatment
Circuit (40).
6. a kind of Wearable device, is worn at human body privileged site, it is characterised in that including multiple electromyographic signal collection lists
First (a) and flexible connecting material (b), the flexible connecting material (b) are used to connect electromyographic signal collection unit (a) with shape
Circlewise structure；Wherein, electromyographic signal collection unit (a) includes myoelectric sensor (30), muscle electrical signal process circuit
(40) the electromyographic signal collection circuit (20) and as described in any one of Claims 1 to 5.
7. equipment as claimed in claim 6, it is characterised in that the myoelectric sensor (30) is using 1Cr12 materials as electricity
Pole piece.
8. equipment as claimed in claim 6, it is characterised in that the myoelectric sensor (30) is welded on the carrying myoelectricity letter
Electrically connected with the signal amplification circuit (21) on the circuit board (25) of number Acquisition Circuit (20) and by circuit board micropore.
9. equipment as claimed in claim 6, it is characterised in that the myoelectric sensor (30) includes two first electrodes (31)
With a second electrode (32), the second electrode is located between two first electrodes and the size of the second electrode is small
In the size of the first electrode.
10. equipment as claimed in claim 6, it is characterised in that the muscle electrical signal process circuit (40) includes virtual value electricity
Road (41) and A/D converter circuit (42)；The true rms circuit (41) be electrically connected the A/D converter circuit (42) and it is described can
Variable-gain amplifying circuit (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620767952.0U CN206261586U (en) | 2016-07-20 | 2016-07-20 | Electromyographic signal collection circuit and Wearable device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620767952.0U CN206261586U (en) | 2016-07-20 | 2016-07-20 | Electromyographic signal collection circuit and Wearable device |
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| Publication Number | Publication Date |
|---|---|
| CN206261586U true CN206261586U (en) | 2017-06-20 |
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ID=59035644
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| CN (1) | CN206261586U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106175759A (en) * | 2016-07-20 | 2016-12-07 | 西安中科比奇创新科技有限责任公司 | Electromyographic signal collection circuit and Wearable device |
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2016
- 2016-07-20 CN CN201620767952.0U patent/CN206261586U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106175759A (en) * | 2016-07-20 | 2016-12-07 | 西安中科比奇创新科技有限责任公司 | Electromyographic signal collection circuit and Wearable device |
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| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20181214 Address after: 10 000 07 Group B 7, 3rd floor, Zhangzizhong Road, Dongcheng District, Beijing Patentee after: Zhang Wendong Address before: 710000 Room 204, Arc Tower, 60 West Avenue, New Industrial Park, Xi'an High-tech Zone, Shaanxi Province Patentee before: XI'AN ZHONGKE BIQI INNOVATION TECHNOLOGY CO., LTD. |
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