CN219763342U - Collecting circuit and collecting device for pelvic floor muscle potential difference value - Google Patents
Collecting circuit and collecting device for pelvic floor muscle potential difference value Download PDFInfo
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- CN219763342U CN219763342U CN202223612236.XU CN202223612236U CN219763342U CN 219763342 U CN219763342 U CN 219763342U CN 202223612236 U CN202223612236 U CN 202223612236U CN 219763342 U CN219763342 U CN 219763342U
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- 210000003205 muscle Anatomy 0.000 title claims abstract description 29
- 210000003903 pelvic floor Anatomy 0.000 title claims abstract description 28
- 230000003183 myoelectrical effect Effects 0.000 claims abstract description 24
- 230000003321 amplification Effects 0.000 claims abstract description 13
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 13
- 239000003990 capacitor Substances 0.000 claims description 44
- 238000001914 filtration Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 5
- 230000004044 response Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000036982 action potential Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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- 230000002232 neuromuscular Effects 0.000 description 1
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Abstract
The utility model discloses a circuit and a device for collecting a pelvic floor muscle potential difference value. Wherein, acquisition circuit includes: the electrode signal input end, the differential amplifying circuit, the filter circuit and the secondary amplifying circuit; the electrode signal input end is connected with the input end of the differential amplifying circuit; the output end of the differential amplifying circuit is connected with the filter circuit; the filter circuit is connected with the input end of the secondary amplifying circuit; the differential amplification circuit receives the collected myoelectric potential of the pelvic floor muscles of the human body through the electrode signal input end to obtain human body myoelectric signals; the human myoelectric signal is filtered and amplified by the filter circuit and the secondary amplifying circuit to obtain a final pelvic floor muscle potential difference value, so that a more stable technical scheme for collecting the pelvic floor muscle potential difference value is provided.
Description
Technical Field
The utility model relates to the technical field of signal acquisition, in particular to an acquisition circuit and an acquisition device for a pelvic floor muscle potential difference value.
Background
The electromyographic signals are the superposition of the action potentials of the motor units in the muscle fibers in time and space. The acquisition of myoelectric signals plays an important role in studying neuromuscular activity. At present, the electromyographic signal acquisition technology is continuously developed, and along with the deep research of the electromyographic signals, the requirements on the stability of the acquired electromyographic signals are higher and higher, and the existing electromyographic signal acquisition technology cannot filter out some useless signals and interference signals, so that the acquired electromyographic signals are poor in stability.
The foregoing description is provided for general background information and does not necessarily constitute prior art.
Disclosure of Invention
In order to solve the problems, the utility model provides a collecting circuit and a collecting device for a basin bottom muscle potential difference value, which can specifically adjust a frequency band of a collected signal to finish filtering interference signals, avoid error information generated when myoelectricity is collected, and are used for solving the technical problem of poor stability of the myoelectricity signal collected in the prior art.
The utility model provides a collecting circuit of a pelvic floor muscle potential difference value, which comprises: the electrode signal input end, the differential amplifying circuit, the filter circuit and the secondary amplifying circuit;
the electrode signal input end is connected with the input end of the differential amplifying circuit;
the output end of the differential amplifying circuit is connected with the filter circuit;
the filter circuit is connected with the input end of the secondary amplifying circuit;
the differential amplification circuit receives the collected myoelectric potential of the pelvic floor muscles of the human body through the electrode signal input end to obtain human body myoelectric signals;
and the human body electromyographic signals are filtered and amplified by the filter circuit and the secondary amplifying circuit to obtain a final pelvic floor muscle potential difference value.
Further, the filter circuit comprises a high-pass filter sub-circuit, a low-pass filter sub-circuit and a notch sub-circuit;
the output end of the differential amplifying circuit is connected with the input end of the high-pass filter sub-circuit;
the output end of the high-pass filter sub-circuit is connected with the input end of the low-pass filter sub-circuit;
the output end of the low-pass filter sub-circuit is connected with the input end of the notch sub-circuit;
the output end of the notch sub-circuit is connected with the input end of the secondary amplifying circuit.
Further, the differential amplifying circuit comprises a first operational amplifier, a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor and a second capacitor;
the electrode signal input end comprises a first electrode signal input end and a second electrode signal input end;
the negative input end of the first operational amplifier is connected with the first electrode signal input end through the first resistor;
the second resistor and the first capacitor are connected in parallel between the negative input end and the output end of the first operational amplifier;
the positive input end of the first operational amplifier is connected with the second electrode signal input end through the third resistor;
the fourth resistor and the second capacitor are connected in parallel between the positive input of the first operational amplifier and ground.
Further, the resistance values of the first resistor and the second resistor are equal;
and the resistance values of the third resistor and the fourth resistor are equal.
Further, the second-stage amplifying circuit comprises a first potentiometer, a second potentiometer, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a third capacitor, a second operational amplifier and a third operational amplifier;
the negative input end of the second operational amplifier is connected with the output end of the notch sub-circuit through the fifth resistor;
the positive input end of the second operational amplifier is connected with a threshold voltage;
the fixed end of the first potentiometer and the third capacitor are connected between the negative input end and the output end of the second operational amplifier in a parallel manner, and the adjusting end of the first potentiometer is connected with any one of the fixed ends of the first potentiometer;
the negative input end of the third operational amplifier is connected with the output end of the second operational amplifier through the sixth resistor;
the positive input end of the third operational amplifier is connected with the adjusting end of the second potentiometer;
one end of the fixed end of the second potentiometer is connected with one end of the seventh resistor, and the other end of the fixed end of the second potentiometer is connected with one end of the eighth resistor;
the other end of the seventh resistor is connected with a power supply voltage, and the other end of the eighth resistor is grounded.
The utility model also provides a device for collecting the potential difference value of the pelvic floor muscle, which comprises an electrode patch group and a collecting circuit;
the acquisition circuit includes: the electrode signal input end, the differential amplifying circuit, the filter circuit and the secondary amplifying circuit;
the electrode signal input end is connected with the input end of the differential amplifying circuit;
the output end of the differential amplifying circuit is connected with the filter circuit;
the filter circuit is connected with the input end of the secondary amplifying circuit;
the differential amplification circuit receives the collected myoelectric potential of the pelvic floor muscles of the human body through the electrode signal input end to obtain human body myoelectric signals;
the human myoelectric signal is filtered and amplified by the filter circuit and the secondary amplifying circuit to obtain a final pelvic floor muscle potential difference value;
the electrode patch group is connected with an electrode signal input end in the acquisition circuit;
wherein, the electrode patch group is used for collecting the myoelectric potential of the pelvic floor muscles of the human body.
Further, the filter circuit comprises a high-pass filter sub-circuit, a low-pass filter sub-circuit and a notch sub-circuit;
the output end of the differential amplifying circuit is connected with the input end of the high-pass filter sub-circuit;
the output end of the high-pass filter sub-circuit is connected with the input end of the low-pass filter sub-circuit;
the output end of the low-pass filter sub-circuit is connected with the input end of the notch sub-circuit;
the output end of the notch sub-circuit is connected with the input end of the secondary amplifying circuit.
Further, the differential amplifying circuit comprises a first operational amplifier, a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor and a second capacitor;
the electrode signal input end comprises a first electrode signal input end and a second electrode signal input end;
the electrode patch group comprises a first electrode patch and a second electrode patch;
the negative input end of the first operational amplifier is connected with the first electrode signal input end through the first resistor;
the second resistor and the first capacitor are connected in parallel between the negative input end and the output end of the first operational amplifier;
the positive input end of the first operational amplifier is connected with the second electrode signal input end through the third resistor;
the fourth resistor and the second capacitor are connected between the positive input end of the first operational amplifier and ground in a parallel manner;
the first electrode patch is connected with the first electrode signal input end;
the second electrode patch is connected with the second electrode signal input end.
Further, the resistance values of the first resistor and the second resistor are equal;
and the resistance values of the third resistor and the fourth resistor are equal.
Further, the second-stage amplifying circuit comprises a first potentiometer, a second potentiometer, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a third capacitor, a second operational amplifier and a third operational amplifier;
the negative input end of the second operational amplifier is connected with the output end of the notch sub-circuit through the fifth resistor;
the positive input end of the second operational amplifier is connected with a threshold voltage;
the fixed end of the first potentiometer and the third capacitor are connected between the negative input end and the output end of the second operational amplifier in a parallel manner, and the adjusting end of the first potentiometer is connected with any one of the fixed ends of the first potentiometer;
the negative input end of the third operational amplifier is connected with the output end of the second operational amplifier through the sixth resistor;
the positive input end of the third operational amplifier is connected with the adjusting end of the second potentiometer;
one end of the fixed end of the second potentiometer is connected with one end of the seventh resistor, and the other end of the fixed end of the second potentiometer is connected with one end of the eighth resistor;
the other end of the seventh resistor is connected with a power supply voltage, and the other end of the eighth resistor is grounded.
The technical scheme provided by the utility model has at least the following beneficial effects:
through introducing differential amplifier circuit, filter circuit and second grade amplifier circuit, can carry out specific regulation to the collection signal frequency channel, accomplish the interference signal of filtering, the error message that produces when avoiding gathering the myoelectricity to gather more stable myoelectricity signal.
The above summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. The above summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter. The claimed subject matter is not limited to implementations that solve any or all disadvantages noted in the background.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model. In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort. The drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but rather to illustrate the inventive concepts to those skilled in the art by reference to the specific embodiments. In the drawings:
FIG. 1 is a schematic diagram of connection of a circuit for acquiring a pelvic floor muscle potential difference value according to an embodiment of the present utility model;
fig. 2 is a schematic connection diagram of a differential amplifying circuit according to an embodiment of the present utility model;
fig. 3 is a schematic connection diagram of a two-stage amplifying circuit according to an embodiment of the present utility model.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the utility model. Rather, they are merely examples of apparatus and methods consistent with aspects of the utility model as detailed in the accompanying claims.
It should be noted that, in this document, the terms "comprising," "including," or any other variation thereof, are intended to include
Where a non-exclusive inclusion is included, such that a process, method, article, or apparatus 5 that comprises a list of elements does not include only those elements but may include other elements not expressly listed or include as well
Elements inherent to such processes, methods, articles, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. It should be further understood that as used herein
The singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise by a 0. Furthermore, the term "or", "and/or", "as used herein includes at least one of the following"
Etc. may be construed as inclusive, or meaning any one or any combination. An exception to this definition will occur only when a combination of elements, functions, steps or operations are in some way inherently mutually exclusive.
It should be understood that although the terms first, second, third, etc. may be used herein to describe various parameters
Or modules, these parameters or modules should not be limited to these terms. These terms are only used to distinguish 5 parameters or modules of the same type from each other. For example, the first parameter may also be
Referred to as the second parameter, and similarly, the second parameter may also be referred to as the first parameter. The words "if", as used herein, may be interpreted as "at … …" or "at … …", depending on the context "
Or "in response to a determination" or "in response to a detection". Similarly, the phrase "if determined" depends on the context "
Or "if detected (stated condition or event)" may be interpreted as "when determined" or "determined in response to 0" or "when detected (stated condition or event)" or "in response to detection (stated condition or event)
Event) ". Furthermore, components, features, elements of the utility model that are commonly referred to in different embodiments may have the same meaning or may have different meanings, the particular meaning of which is to be determined by its interpretation in this particular embodiment or further by reference to the context of this particular embodiment.
It should be understood that, although the steps in the flowcharts in the embodiments of the present utility model are shown 5 times as indicated by the arrows, the steps are not necessarily sequentially performed in the order indicated by the arrows. Unless the context indicates otherwise
It is explicitly stated that the execution of these steps is not strictly limited in order, but may be performed in other order. Moreover, at least some of the steps in the figures may include multiple sub-steps or stages that are not necessarily performed at the same time, but may be performed at different times, the order of their execution not necessarily occurring in sequence, but may be performed alternately or alternately with other steps or at least a portion of the other steps or stages.
It should be understood that the detailed description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the claims.
Referring to fig. 1, the utility model provides a circuit for collecting a pelvic floor muscle potential difference value, comprising: the electrode signal input end, the differential amplifying circuit, the filter circuit and the secondary amplifying circuit;
the electrode signal input end is connected with the input end of the differential amplifying circuit;
the output end of the differential amplifying circuit is connected with the filter circuit;
the filter circuit is connected with the input end of the secondary amplifying circuit;
the differential amplification circuit receives the collected myoelectric potential of the pelvic floor muscles of the human body through the electrode signal input end to obtain human body myoelectric signals;
and the human body electromyographic signals are filtered and amplified by the filter circuit and the secondary amplifying circuit to obtain a final pelvic floor muscle potential difference value.
It should be noted that the electrode signal input terminal in the present utility model is used for receiving the collected myoelectric potential and transmitting the myoelectric potential to the differential amplifying circuit. The differential amplifying circuit has the function of differential input and can be used for amplifying the acquired original myoelectricity difference value. The filter circuit is used for filtering useless signals and interference signals in the signals processed by the differential amplifying circuit. In particular, the filter circuit may be formed by combining multiple types of filter circuits, or may be formed by single types of filter circuits, such as a high-pass filter circuit and a low-pass filter circuit. Trap circuits, etc. The secondary amplifying circuit can amplify the signal processed by the filter circuit again, so that a more stable pelvic floor muscle potential difference value is finally obtained.
Further, the filter circuit comprises a high-pass filter sub-circuit, a low-pass filter sub-circuit and a notch sub-circuit;
the output end of the differential amplifying circuit is connected with the input end of the high-pass filter sub-circuit;
the output end of the high-pass filter sub-circuit is connected with the input end of the low-pass filter sub-circuit;
the output end of the low-pass filter sub-circuit is connected with the input end of the notch sub-circuit;
the output end of the notch sub-circuit is connected with the input end of the secondary amplifying circuit.
It should be noted that, the high-pass filter sub-circuit may be understood as a high-pass filter circuit, the low-pass filter sub-circuit may be understood as a low-pass filter circuit, and the notch sub-circuit may be understood as a notch circuit. The high-pass filter sub-circuit can filter out the low-frequency signal through the function of high-pass filtering. The low-pass filter sub-circuit can filter out high-frequency signals through the function of low-pass filtering. The notch sub-circuit can filter out 50Hz interference signals through the function of notch.
Further, referring to fig. 2, the differential amplifying circuit includes a first operational amplifier U1A, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first capacitor C1 and a second capacitor C2;
the electrode signal input end comprises a first electrode signal input end and a second electrode signal input end;
the negative input end of the first operational amplifier U1A is connected with the first electrode signal input end through the first resistor R1;
the second resistor R2 and the first capacitor C1 are connected in parallel between the negative input terminal and the output terminal of the first operational amplifier U1A;
the positive input end of the first operational amplifier U1A is connected with the second electrode signal input end through the third resistor R3;
the fourth resistor R4 and the second capacitor C2 are connected in parallel between the positive input of the first operational amplifier U1A and ground.
It can be understood that the first operational amplifier U1A may select an operational amplifier of a suitable type according to actual needs, where the first resistor R1, the second resistor R2, the third resistor R3, and the fourth resistor R4 may be resistors of a single type, or may be a combination of resistors formed by combining multiple resistors, and the first capacitor C1 and the second capacitor C2 may be a single capacitor of a suitable type, or may be a combination of multiple capacitors. Preferably, the first operational amplifier U1A may be a zero-shift operational amplifier.
Further, the resistance values of the first resistor R1 and the second resistor R2 are equal;
the third resistor R3 and the fourth resistor R4 have equal resistance values.
Further, referring to fig. 3, the second-stage amplifying circuit includes a first potentiometer Rp1, a second potentiometer Rp2, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a third capacitor C3, a second operational amplifier U2A and a third operational amplifier U3A;
the negative input end of the second operational amplifier U2A is connected with the output end of the notch sub-circuit through the fifth resistor R5;
the positive input end of the second operational amplifier U2A is connected with the threshold voltage V T ；
The fixed end of the first potentiometer Rp1 and the third capacitor C3 are connected in parallel between the negative input end and the output end of the second operational amplifier U2A, and the adjusting end of the first potentiometer Rp1 is connected with any one end of the fixed ends of the first potentiometer Rp 1;
the negative input end of the third operational amplifier U3A is connected with the output end of the second operational amplifier U2A through the sixth resistor R6;
the positive input end of the third operational amplifier U3A is connected with the adjusting end of the second potentiometer Rp 2;
one end of the fixed end of the second potentiometer Rp2 is connected with one end of a seventh resistor R7, and the other end of the fixed end of the second potentiometer Rp2 is connected with one end of an eighth resistor R8;
the other end of the seventh resistor R7 is connected with a power supply voltage VCC, and the other end of the eighth resistor R8 is grounded.
It can be understood that the second operational amplifier U2A and the third operational amplifier U3A may select an operational amplifier of a suitable model according to actual needs, the first potentiometer Rp1 and the second potentiometer Rp2 may select a potentiometer of a suitable model according to actual needs, the fifth resistor R5, the sixth resistor R6, the seventh resistor R7, and the eighth resistor R8 may respectively adopt resistors of a single model, or may adopt a resistor combination formed by combining multiple resistors, and the third capacitor C3 may adopt a single capacitor of a suitable model, or may adopt a plurality of capacitors for combination. In practice, the first potentiometer Rp1 is used to adjust the amplification factor of the system, and the third capacitor C3 is used to prevent the amplifier from self-excitation. The threshold voltage V of the second-stage amplifying circuit of the present utility model is about 0.1V zero drift T O.25v may be used to ensure that interfering signals are filtered out. The secondary amplifying circuit can effectively overcome the influence caused by zero drift and improve the accuracy of measurement.
The utility model also provides a device for collecting the potential difference value of the pelvic floor muscle, which comprises an electrode patch group and a collecting circuit;
the acquisition circuit includes: the electrode signal input end, the differential amplifying circuit, the filter circuit and the secondary amplifying circuit;
the electrode signal input end is connected with the input end of the differential amplifying circuit;
the output end of the differential amplifying circuit is connected with the filter circuit;
the filter circuit is connected with the input end of the secondary amplifying circuit;
the differential amplification circuit receives the collected myoelectric potential of the pelvic floor muscles of the human body through the electrode signal input end to obtain human body myoelectric signals;
the human myoelectric signal is filtered and amplified by the filter circuit and the secondary amplifying circuit to obtain a final pelvic floor muscle potential difference value;
the electrode patch group is connected with an electrode signal input end in the acquisition circuit;
wherein, the electrode patch group is used for collecting the myoelectric potential of the pelvic floor muscles of the human body.
In a specific application process, when a human body signal is input to the acquisition device, the acquisition device acquires and amplifies myoelectric potentials at two electrode patches (namely electrode patch groups) of a human body through differential input by the differential amplification circuit to obtain an original amplified human body myoelectric signal, the myoelectric signal is processed by the filter circuit (comprising a high-pass filter circuit, a low-pass filter circuit, a trap circuit and the like) on an effective frequency band of the signal, and finally the processed signal is amplified by the secondary amplification circuit.
Further, the filter circuit comprises a high-pass filter sub-circuit, a low-pass filter sub-circuit and a notch sub-circuit;
the output end of the differential amplifying circuit is connected with the input end of the high-pass filter sub-circuit;
the output end of the high-pass filter sub-circuit is connected with the input end of the low-pass filter sub-circuit;
the output end of the low-pass filter sub-circuit is connected with the input end of the notch sub-circuit;
the output end of the notch sub-circuit is connected with the input end of the secondary amplifying circuit.
Further, the differential amplifying circuit comprises a first operational amplifier, a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor and a second capacitor;
the electrode signal input end comprises a first electrode signal input end and a second electrode signal input end;
the electrode patch group comprises a first electrode patch and a second electrode patch;
the negative input end of the first operational amplifier is connected with the first electrode signal input end through the first resistor;
the second resistor and the first capacitor are connected in parallel between the negative input end and the output end of the first operational amplifier;
the positive input end of the first operational amplifier is connected with the second electrode signal input end through the third resistor;
the fourth resistor and the second capacitor are connected between the positive input end of the first operational amplifier and ground in a parallel manner;
the first electrode patch is connected with the first electrode signal input end;
the second electrode patch is connected with the second electrode signal input end.
Further, the resistance values of the first resistor and the second resistor are equal;
and the resistance values of the third resistor and the fourth resistor are equal.
Further, the second-stage amplifying circuit comprises a first potentiometer, a second potentiometer, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a third capacitor, a second operational amplifier and a third operational amplifier;
the negative input end of the second operational amplifier is connected with the output end of the notch sub-circuit through the fifth resistor;
the positive input end of the second operational amplifier is connected with a threshold voltage;
the fixed end of the first potentiometer and the third capacitor are connected between the negative input end and the output end of the second operational amplifier in a parallel manner, and the adjusting end of the first potentiometer is connected with any one of the fixed ends of the first potentiometer;
the negative input end of the third operational amplifier is connected with the output end of the second operational amplifier through the sixth resistor;
the positive input end of the third operational amplifier is connected with the adjusting end of the second potentiometer;
one end of the fixed end of the second potentiometer is connected with one end of the seventh resistor, and the other end of the fixed end of the second potentiometer is connected with one end of the eighth resistor;
the other end of the seventh resistor is connected with a power supply voltage, and the other end of the eighth resistor is grounded.
The foregoing embodiment numbers of the present utility model are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
In the present utility model, the same or similar term concept, technical solution and/or application scenario description will be generally described in detail only when first appearing and then repeatedly appearing, and for brevity, the description will not be repeated generally, and in understanding the present utility model technical solution and the like, reference may be made to the previous related detailed description thereof for the same or similar term concept, technical solution and/or application scenario description and the like which are not described in detail later.
In the present utility model, the descriptions of the embodiments are emphasized, and the details or descriptions of the other embodiments may be referred to.
The technical features of the technical scheme of the utility model can be arbitrarily combined, and all possible combinations of the technical features in the above embodiment are not described for the sake of brevity, however, as long as there is no contradiction between the combinations of the technical features, the utility model shall be considered as the scope of the description of the utility model.
The foregoing description is only of the preferred embodiments of the present utility model, and is not intended to limit the scope of the utility model, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (10)
1. An acquisition circuit of pelvic floor muscle potential difference value, which is characterized by comprising: the electrode signal input end, the differential amplifying circuit, the filter circuit and the secondary amplifying circuit;
the electrode signal input end is connected with the input end of the differential amplifying circuit;
the output end of the differential amplifying circuit is connected with the filter circuit;
the filter circuit is connected with the input end of the secondary amplifying circuit;
the differential amplification circuit receives the collected myoelectric potential of the pelvic floor muscles of the human body through the electrode signal input end to obtain human body myoelectric signals;
and the human body electromyographic signals are filtered and amplified by the filter circuit and the secondary amplifying circuit to obtain a final pelvic floor muscle potential difference value.
2. The acquisition circuit of claim 1, wherein the filtering circuit comprises a high pass filtering sub-circuit, a low pass filtering sub-circuit, and a notch sub-circuit;
the output end of the differential amplifying circuit is connected with the input end of the high-pass filter sub-circuit;
the output end of the high-pass filter sub-circuit is connected with the input end of the low-pass filter sub-circuit;
the output end of the low-pass filter sub-circuit is connected with the input end of the notch sub-circuit;
the output end of the notch sub-circuit is connected with the input end of the secondary amplifying circuit.
3. The acquisition circuit of claim 2 wherein the differential amplification circuit comprises a first operational amplifier, a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, and a second capacitor;
the electrode signal input end comprises a first electrode signal input end and a second electrode signal input end;
the negative input end of the first operational amplifier is connected with the first electrode signal input end through the first resistor;
the second resistor and the first capacitor are connected in parallel between the negative input end and the output end of the first operational amplifier;
the positive input end of the first operational amplifier is connected with the second electrode signal input end through the third resistor;
the fourth resistor and the second capacitor are connected in parallel between the positive input of the first operational amplifier and ground.
4. The acquisition circuit of claim 3, wherein the first resistor and the second resistor have equal resistance values;
and the resistance values of the third resistor and the fourth resistor are equal.
5. The acquisition circuit of claim 2, wherein the secondary amplification circuit comprises a first potentiometer, a second potentiometer, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a third capacitor, a second operational amplifier, and a third operational amplifier;
the negative input end of the second operational amplifier is connected with the output end of the notch sub-circuit through the fifth resistor;
the positive input end of the second operational amplifier is connected with a threshold voltage;
the fixed end of the first potentiometer and the third capacitor are connected between the negative input end and the output end of the second operational amplifier in a parallel manner, and the adjusting end of the first potentiometer is connected with any one of the fixed ends of the first potentiometer;
the negative input end of the third operational amplifier is connected with the output end of the second operational amplifier through the sixth resistor;
the positive input end of the third operational amplifier is connected with the adjusting end of the second potentiometer;
one end of the fixed end of the second potentiometer is connected with one end of the seventh resistor, and the other end of the fixed end of the second potentiometer is connected with one end of the eighth resistor;
the other end of the seventh resistor is connected with a power supply voltage, and the other end of the eighth resistor is grounded.
6. A device for collecting the potential difference value of pelvic floor muscles, which is characterized by comprising an electrode patch group and a collecting circuit as in claim 1;
the electrode patch group is connected with an electrode signal input end in the acquisition circuit;
wherein, the electrode patch group is used for collecting the myoelectric potential of the pelvic floor muscles of the human body.
7. The acquisition device of claim 6, wherein the filtering circuit comprises a high pass filtering sub-circuit, a low pass filtering sub-circuit, and a notch sub-circuit;
the output end of the differential amplifying circuit is connected with the input end of the high-pass filter sub-circuit;
the output end of the high-pass filter sub-circuit is connected with the input end of the low-pass filter sub-circuit;
the output end of the low-pass filter sub-circuit is connected with the input end of the notch sub-circuit;
the output end of the notch sub-circuit is connected with the input end of the secondary amplifying circuit.
8. The acquisition device of claim 7, wherein the differential amplification circuit comprises a first operational amplifier, a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, and a second capacitor;
the electrode signal input end comprises a first electrode signal input end and a second electrode signal input end;
the electrode patch group comprises a first electrode patch and a second electrode patch;
the negative input end of the first operational amplifier is connected with the first electrode signal input end through the first resistor;
the second resistor and the first capacitor are connected in parallel between the negative input end and the output end of the first operational amplifier;
the positive input end of the first operational amplifier is connected with the second electrode signal input end through the third resistor;
the fourth resistor and the second capacitor are connected between the positive input end of the first operational amplifier and ground in a parallel manner;
the first electrode patch is connected with the first electrode signal input end;
the second electrode patch is connected with the second electrode signal input end.
9. The acquisition device of claim 8, wherein the first resistor and the second resistor have equal resistance values;
and the resistance values of the third resistor and the fourth resistor are equal.
10. The acquisition device of claim 7, wherein the secondary amplification circuit comprises a first potentiometer, a second potentiometer, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a third capacitor, a second operational amplifier, and a third operational amplifier;
the negative input end of the second operational amplifier is connected with the output end of the notch sub-circuit through the fifth resistor;
the positive input end of the second operational amplifier is connected with a threshold voltage;
the fixed end of the first potentiometer and the third capacitor are connected between the negative input end and the output end of the second operational amplifier in a parallel manner, and the adjusting end of the first potentiometer is connected with any one of the fixed ends of the first potentiometer;
the negative input end of the third operational amplifier is connected with the output end of the second operational amplifier through the sixth resistor;
the positive input end of the third operational amplifier is connected with the adjusting end of the second potentiometer;
one end of the fixed end of the second potentiometer is connected with one end of the seventh resistor, and the other end of the fixed end of the second potentiometer is connected with one end of the eighth resistor;
the other end of the seventh resistor is connected with a power supply voltage, and the other end of the eighth resistor is grounded.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223612236.XU CN219763342U (en) | 2022-12-29 | 2022-12-29 | Collecting circuit and collecting device for pelvic floor muscle potential difference value |
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| CN202223612236.XU CN219763342U (en) | 2022-12-29 | 2022-12-29 | Collecting circuit and collecting device for pelvic floor muscle potential difference value |
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| CN219763342U true CN219763342U (en) | 2023-09-29 |
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