CN216702544U

CN216702544U - Multivibrator for female pelvic floor muscle pressure detection system

Info

Publication number: CN216702544U
Application number: CN202120592652.4U
Authority: CN
Inventors: 谢晗; 原晶; 曹嵘; 谢胜昔; 夏明昌; 王宇杰
Original assignee: Vtrump Tech Shanghai Co ltd
Current assignee: Vtrump Tech Shanghai Co ltd
Priority date: 2021-03-23
Filing date: 2021-03-23
Publication date: 2022-06-10
Anticipated expiration: 2031-03-23

Abstract

The utility model provides a multivibrator for a female pelvic floor muscle pressure detection system, which comprises a first resistor, a second resistor, a Schmidt trigger and a first electrical component, wherein the first electrical component comprises a first capacitor, a second capacitor and a series resistor, one end of the first resistor is electrically connected with the output end of the Schmidt trigger, the other end of the first resistor is respectively and electrically connected with the first electrical component and the second resistor, one end of the second resistor is electrically connected with the input end of the Schmidt trigger, the other end of the second resistor is respectively and electrically connected with the first electrical component and the first resistor, one end of the first electrical component is respectively and electrically connected with the first resistor and the second resistor, the other end of the first electrical component is grounded, one end of the series resistor is respectively and electrically connected with the first resistor and the second resistor, one end of the first capacitor is electrically connected with the first resistor and the second resistor respectively.

Description

Multivibrator for female pelvic floor muscle pressure detection system

Technical Field

The utility model relates to the technical field of medical care, in particular to a female pelvic floor muscle pressure detection system. Further, the utility model also relates to a multivibrator for a female pelvic floor muscle pressure detection system.

Utility model

Background

Female pelvic floor muscles refer to the group of muscles that close the pelvic floor. The muscle groups that make up the pelvic floor muscles surround the organs such as urethra, bladder, uterus, rectum, etc., support the pelvic and abdominal organs, and maintain them in their normal position for their function. Thus, pelvic floor muscles are involved in bladder, bowel and sexual function. Pelvic floor muscles can be damaged by infectious disease, inflammation, trauma, or excessive laceration, such as that resulting from fertility. After the muscle groups forming the pelvic floor muscles are damaged, the elasticity is deteriorated, and related organs can not be maintained at normal positions, so that corresponding dysfunction, such as difficult excretion, cystitis, pelvic floor organ prolapse, incongruous sexual life, chronic discomfort and the like, can occur.

Clinically, to determine the extent of pelvic floor muscle damage or post-treatment recovery in women, the ability of the female pelvic floor muscles to contract needs to be tested to facilitate evaluation and determination of treatment regimens by physicians. In addition, for patients whose pelvic floor muscles are relaxed for childbearing or age reasons, it is also necessary to detect the contractility of the pelvic floor muscles when exercising the pelvic floor muscles using the pelvic floor muscle exercise device in order to understand the recovery of the pelvic floor muscles and to exercise the pelvic floor muscles in a targeted manner. Generally, the ability of female pelvic muscles to contract is detected by a pressure sensor placed at a suitable location within the body. For example, the diaphragm pressure sensor may be placed on a carrier and then placed in position within a female anatomy, and the pressure experienced by the diaphragm pressure sensor may be detected to determine the contractile capacity of the female pelvic floor muscles. Common carriers for providing thin film pressure sensing include kegel balls or vibrating implements for female pelvic floor muscle exercises, and the like. In this way, the contractile capacity of female pelvic muscles can be detected in real time.

Uk patent application No. 1111532.6 teaches an electronic position sensor responsive to the compression or positioning or movement of the device itself, which can be inserted into the pelvic cavity and detect and respond to movement of the wearer and feedback device. However, the electronic device provided by this patent has a number of drawbacks: first, the electronic device needs to first detect the user's feedback device through the sensor and then remind the user to assume a better posture through its vibration motor. Therefore, the electronic device disclosed in this patent provides only one reminder and does not directly detect the contractile ability of the pelvic floor muscles and provide a direct detection result to the user. Secondly, the electronic device can only play a certain role in strengthening the pelvic floor muscles of the patient when the patient successfully contracts the corresponding muscles. Therefore, the electronic device functions only through vibration therapy of its vibration motor, and it cannot guide and help the user to exercise their pelvic floor muscles by providing the user with the result of detection of the pelvic floor muscle contraction force. Finally, the electronic device can only obtain a blurred and non-quantitative gesture signal.

Chinese patent application No. CN201410751835.0 provides a female pelvic floor muscle pressure detection device, wherein the female pelvic floor muscle pressure detection device can detect the contractility of the pelvic floor muscles of a user through the film pressure sensor thereof and help the user to exercise the pelvic floor muscles according to the detection result, wherein the female pelvic floor muscle pressure detection device adopts a resistance type film pressure sensor which is attached on a carrier and is placed at a proper position in a human body, the output resistance of the film pressure sensor is reduced along with the increase of the pressure applied to the surface of the film pressure sensor, the film pressure sensor is connected with the analog-digital conversion module through a voltage amplifying circuit, the pressure applied to the surface of the film pressure sensor is detected by detecting the change in the resistance of the film pressure sensor and the resistance-pressure relationship of the film pressure sensor. However, although the resistance value of the thin film pressure sensor changes monotonously with a change in the pressure to which it is subjected, the correspondence relationship between the resistance value of the thin film pressure sensor and the pressure does not correspond linearly but corresponds nonlinearly. In other words, when the pressure applied to the film pressure sensor is small, the resistance changes largely with the pressure change, and when the pressure applied to the film pressure sensor is large, the resistance changes relatively little with the pressure change. Therefore, when the pressure applied to the film pressure sensor is small, the resistance changes too much with the pressure change, and when the pressure applied to the film pressure sensor is large, the resistance changes too little with the pressure change, so that whether the pressure applied to the film pressure sensor is too small or too large, the pressure applied to the film pressure sensor is detected by detecting the resistance of the film pressure sensor, and accurate detection is difficult to achieve. In addition, when the pressure applied to the film pressure sensor is small, the resistance changes too much with the pressure change, and when the pressure applied to the film pressure sensor is large, the resistance changes too little with the pressure change, which also results in a small pressure range that can be detected when the pressure applied to the film pressure sensor is detected by detecting the resistance of the film pressure sensor.

SUMMERY OF THE UTILITY MODEL

The main advantage of the present invention is to provide a female pelvic floor muscle pressure detection system, wherein the female pelvic floor muscle pressure detection system converts a resistance signal of a thin film pressure sensor for detecting female pelvic floor muscle pressure into a corresponding oscillation frequency signal through a multivibrator thereof, so that the pressure applied to the thin film pressure sensor can be obtained by detecting the oscillation frequency of the multivibrator. Accordingly, the female pelvic muscle pressure detection system can overcome the defect that the pressure applied to the thin film pressure sensor is detected by detecting the resistance of the thin film pressure sensor.

Another advantage of the present invention is to provide a female pelvic floor muscle pressure detecting system, wherein the thin film pressure sensor of the female pelvic floor muscle pressure detecting system of the present invention for detecting female pelvic floor muscle pressure is connected to a multivibrator, wherein the thin film pressure sensor can be regarded as a feedback resistance of the multivibrator, and the multivibrator is configured such that an oscillation frequency thereof changes monotonically (increases or decreases monotonically) with a decrease in the resistance of the thin film pressure sensor, so that the oscillation frequency of the multivibrator and the pressure to which the thin film pressure sensor is subjected form a corresponding relationship. It is understood that the resistance of the thin film pressure sensor changes monotonically (increases or decreases monotonically) with changes in the pressure to which it is subjected.

Another advantage of the present invention is to provide a female pelvic floor muscle pressure detection system, wherein the female pelvic floor muscle pressure detection system of the present invention connects a thin film pressure sensor for detecting female pelvic floor muscle pressure to a multivibrator, wherein the thin film pressure sensor can be regarded as a feedback resistance of the multivibrator, and the multivibrator is configured such that an oscillation frequency thereof becomes monotonically larger as the resistance of the thin film pressure sensor decreases and such that the oscillation frequency of the multivibrator is in a linear relationship with the pressure received by the thin film pressure sensor, thereby expanding an upper limit and a lower limit of a detection range of the female pelvic floor muscle pressure detection system and enhancing a detection accuracy of the female pelvic floor muscle pressure detection system. Accordingly, the female pelvic muscle pressure detection system of the present invention is capable of detecting a greater range of pressure values and smaller changes in pressure values.

Another advantage of the present invention is to provide a female pelvic floor muscle pressure sensing system, in which the female pelvic floor muscle pressure sensing system can determine the pressure (or contraction force) of the pelvic floor muscle to which the thin film pressure sensor is subjected, corresponding to the oscillation frequency of the multivibrator, through the oscillation frequency of the multivibrator, so that the pressure can be visually provided to a user, thereby allowing the user to conveniently obtain the pressure of the sensed pelvic floor muscle.

Another advantage of the present invention is to provide a multivibrator for a female pelvic floor muscle pressure detection system, wherein the multivibrator for a female pelvic floor muscle pressure detection system can convert a resistance signal of a thin film pressure sensor for detecting female pelvic floor muscle pressure into a corresponding oscillation frequency signal, so that the pressure applied to the thin film pressure sensor can be obtained by detecting the oscillation frequency of the multivibrator.

Other objects and features of the present invention will become more fully apparent from the following detailed description and appended claims, taken in conjunction with the accompanying drawings, wherein like reference numerals refer to like parts throughout.

To achieve at least one of the above advantages or objects of the present invention, there is provided a multivibrator for a female pelvic muscle pressure detection system, including:

a first resistive component;

a second resistive component;

an operational amplifier; and

one end of the first resistive component is electrically connected with the second resistive component and the non-inverting input end of the operational amplifier respectively, the other end of the first resistive component is electrically connected with the output end of the operational amplifier, one end of the second resistive component is grounded, the other end of the second resistive component is electrically connected with the non-inverting input end of the operational amplifier and the first resistive component respectively, one end of the capacitive component is grounded, the other end of the capacitive component is electrically connected with the inverting input end of the operational amplifier, the output end of the operational amplifier is electrically connected with the first resistive component, the inverting input end of the operational amplifier is electrically connected with the capacitive component, and the non-inverting input end of the operational amplifier is electrically connected with the first resistive component and the second resistive component respectively.

Further, the capacitive component includes a first capacitor, a first resistor and a second resistor, the first resistive component includes at least one first adjusting resistor, the second resistive component includes at least one second adjusting resistor, wherein the first resistor and the first capacitor of the capacitive component are connected in series, and the first resistor, the first capacitor and the second resistor are connected in parallel.

Further, the capacitive component further includes a second capacitor, the first resistive component further includes at least one first adjusting capacitor, the second resistive component further includes at least one second adjusting capacitor, wherein the first resistor is connected in parallel with the first capacitor, the second resistor and the second capacitor, the first adjusting resistor is connected in parallel with the first adjusting capacitor, and the second adjusting resistor is connected in parallel with the second adjusting capacitor.

Further, the multivibrator further comprises a starting resistor, wherein one end of the first resistive element is electrically connected to the second resistive element and the non-inverting input terminal of the operational amplifier, the other end of the first resistive element is electrically connected to the starting resistor and the output terminal of the operational amplifier, one end of the capacitive element is grounded, the other end of the capacitive element is electrically connected to the inverting input terminal of the operational amplifier and the starting resistor, the output terminal of the operational amplifier is electrically connected to the starting resistor and the first resistive element, and the inverting input terminal of the operational amplifier is electrically connected to the starting resistor and the capacitive element.

According to another aspect of the present invention, there is further provided another multivibrator for a female pelvic floor muscle pressure detection system, comprising:

a first resistive component;

a second resistive component;

a comparator; and

a capacitive component, wherein one end of the second resistive component is grounded, and the other end is electrically connected with the non-inverting input terminal of the comparator and the first resistive component respectively, one end of the capacitive component is grounded, the other end of the capacitive component is respectively electrically connected with the inverting input end of the comparator and the first end of the film pressure sensor, the output end of the comparator is respectively electrically connected with the second end of the film pressure sensor and the first resistive component, the inverting input terminal of the comparator is electrically connected with the first terminal of the film pressure sensor and the capacitive element respectively, the non-inverting input end of the comparator is respectively and electrically connected with the first resistive component and the second resistive component, one end of the first resistive component is electrically connected with the second resistive component and the non-inverting input end of the comparator respectively, and the other end of the first resistive component is electrically connected with the second end of the film pressure sensor and the output end of the comparator respectively.

a first resistor;

a second resistor;

a Schmitt trigger; and

the first electrical component comprises a first capacitor, a second capacitor and a series resistor, wherein one end of the first resistor is electrically connected with the output end of the Schmidt trigger, the other end of the first resistor is electrically connected with the first electrical component and the second resistor respectively, one end of the second resistor is electrically connected with the input end of the Schmidt trigger, the other end of the second resistor is electrically connected with the first electrical component and the first resistor respectively, one end of the first electrical component is electrically connected with the first resistor and the second resistor respectively, the other end of the first electrical component is grounded, one end of the series resistor is electrically connected with the first resistor and the second resistor respectively, and one end of the first capacitor is electrically connected with the first resistor and the second resistor respectively.

Furthermore, the first electrical component also comprises two capacitors, wherein one end of each capacitor is electrically connected with the second resistor, and the other end of each capacitor is grounded. Utility model is novel

The above and other advantages of the utility model will be more fully apparent from the following description and drawings.

The above and other advantages and features of the present invention will be more fully apparent from the following detailed description of the utility model, the accompanying drawings and the claims.

Drawings

Fig. 1 is a schematic structural diagram of a female pelvic floor muscle pressure detection system according to an embodiment of the utility model.

Fig. 2A is a schematic structural diagram of an exemplary multivibrator of the female pelvic floor muscle pressure detection system according to the embodiment of the utility model.

FIG. 2B is a schematic diagram of a preferred implementation of the multivibrator of the female pelvic floor pressure detection system according to the embodiment of the utility model.

FIG. 3 is a resistance-pressure curve of an exemplary membrane pressure sensor of the female pelvic floor pressure detection system according to embodiments of the utility model described above.

FIG. 4 is a resistance versus oscillation frequency curve of an exemplary multivibrator of the female pelvic floor pressure detection system according to embodiments of the present invention described above.

Fig. 5 shows the resistance-oscillation frequency variation curve of the multivibrator and the resistance-pressure variation curve of the exemplary thin film pressure sensor of the female pelvic floor muscle pressure detection system according to the embodiment of the present invention, which are aligned with each other in the same coordinate system, and the resistance-oscillation frequency variation curve of the multivibrator is properly translated and then coincides with the resistance-pressure variation curve of the thin film pressure sensor.

FIG. 6A shows a relationship between the oscillation frequency of the multivibrator and the pressure applied to the diaphragm pressure sensor in the system for detecting pelvic floor muscle pressure according to the embodiment of the present invention.

FIG. 6B shows a correspondence between the oscillation frequency of the preferred implementation of the multivibrator and the pressure experienced by the exemplary membrane pressure sensor of the female pelvic floor muscle pressure detection system according to embodiments of the present invention described above, wherein the graph shows a better linearity between the oscillation frequency of the preferred implementation of the multivibrator and the pressure experienced by the membrane pressure sensor.

FIG. 7A is a schematic diagram of another exemplary multivibrator of the female pelvic floor pressure detection system according to the embodiment of the utility model.

FIG. 7B is a schematic diagram of the preferred implementation of the exemplary multivibrator of the female pelvic floor pressure detection system of FIG. 7A according to the embodiment of the present invention.

FIG. 8A shows the relationship between the oscillation frequency of the exemplary multivibrator and the pressure experienced by the exemplary thin film pressure sensor of the female pelvic floor muscle pressure detection system according to the embodiment of the present invention shown in FIG. 7A.

FIG. 8B shows the correspondence between the oscillation frequency of the preferred implementation of the multivibrator and the pressure experienced by the exemplary membrane pressure sensor of the female pelvic floor muscle pressure detection system according to embodiments of the present invention described above, wherein the graph shows a better linearity between the oscillation frequency of the preferred implementation of the multivibrator and the pressure experienced by the membrane pressure sensor.

FIG. 9 is a schematic diagram of another exemplary multivibrator of the female pelvic floor pressure detection system according to the embodiment of the present invention.

FIG. 10 shows a correspondence between the oscillation frequency of the multivibrator and the pressure to which the thin film pressure sensor is exposed, for example, of the system for detecting pressure of pelvic muscles of a female patient shown in FIG. 9, according to an embodiment of the present invention.

Fig. 11 illustrates an exemplary signal transmission between the female pelvic floor muscle pressure detection system and the client according to an embodiment of the present invention.

Detailed Description

The following description is provided to enable any person skilled in the art to practice the utility model. Other obvious substitutions, modifications and variations will occur to those skilled in the art. Accordingly, the scope of protection of the present invention should not be limited by the exemplary embodiments described herein.

It will be understood by those of ordinary skill in the art that, unless specifically indicated herein, the terms "a" and "an" should be interpreted as meaning that "at least one" or "one or more" may mean that, in one embodiment, one element may be present in one number, and in another embodiment, the element may be present in multiple numbers.

It will be understood by those of ordinary skill in the art that unless otherwise specified herein, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positions illustrated in the drawings for convenience in describing the utility model, and do not indicate or imply that the referenced devices or elements must have a particular orientation or position. Accordingly, the above terms should not be construed as limiting the present invention.

Referring to fig. 1 to 11 of the drawings accompanying the present specification, a female pelvic floor muscle pressure detection system according to an embodiment of the present invention is illustrated, wherein the female pelvic floor muscle pressure detection system comprises a carrier 10, at least one thin film pressure sensor 20 and at least one multivibrator 30, wherein the thin film pressure sensor 20 and the multivibrator 30 are both disposed on the carrier 10, the thin film pressure sensor 20 being electrically connected to the multivibrator 30, wherein the thin film pressure sensor 20 forms a feedback resistance of the multivibrator 30. Preferably, the multivibrator 30 is configured such that the oscillation frequency of the multivibrator 30 corresponds to the pressure to which the thin film pressure sensor 20 is subjected, so that a user or operator can obtain the pressure value to which the thin film pressure sensor 20 is subjected according to the correspondence between the oscillation frequency of the multivibrator 30 and the pressure to which the thin film pressure sensor 20 is subjected by merely detecting (or obtaining) the oscillation frequency of the multivibrator 30. Therefore, the female pelvic muscle pressure detection system can overcome the defect that the existing film pressure sensor detects the pressure applied to the film pressure sensor by detecting the resistance of the film pressure sensor. Preferably, the multivibrator 30 is configured such that the change in the oscillation frequency thereof monotonously changes with the change in the resistance (magnitude) of the thin film pressure sensor 20. More preferably, the multivibrator 30 is configured such that its oscillation frequency monotonously becomes smaller with an increase in resistance of the thin film pressure sensor 20, and the resistance of the thin film pressure sensor 20 monotonously becomes smaller with an increase in pressure. Accordingly, when the pressure applied to the thin film pressure sensor 20 is relatively high, the oscillation frequency of the multivibrator 30 detected by the female pelvic floor pressure detection system of the present invention is relatively high.

Fig. 3 of the accompanying drawings shows a resistance-pressure (value) change curve of an exemplary thin film pressure sensor 20 of a female pelvic floor muscle pressure detection system according to an embodiment of the present invention. As shown in fig. 3 of the accompanying drawings, most of the conventional thin film pressure sensors for detecting the pressure of the pelvic floor muscles of women have monotonically decreasing resistance with increasing pressure, but the resistance of the thin film pressure sensor varies nonlinearly with the pressure, and when the thin film pressure sensor is subjected to a smaller pressure, the resistance varies greatly with the pressure, and when the pressure is subjected to a larger pressure, the resistance varies relatively less with the pressure. Accordingly, when the pressure to which the film pressure sensor 20 is subjected is small, the resistance changes excessively with the change in pressure, and when the pressure to which the film pressure sensor 20 is subjected is large, the resistance changes excessively with the change in pressure, so that it is difficult to detect with high accuracy by detecting the resistance of the film pressure sensor 20 and detecting the pressure to which the film pressure sensor 20 is subjected using the detected resistance of the film pressure sensor 20, regardless of whether the pressure to which the film pressure sensor 20 is subjected is excessively small or large. Further, when the pressure applied to the film pressure sensor 20 is small, the resistance changes excessively with the change in pressure, and when the pressure applied is large, the resistance changes excessively with the change in pressure, which also results in a small pressure range that can be detected when the pressure applied to the film pressure sensor 20 is detected by detecting the resistance thereof. Therefore, the conventional pressure detection method for determining the magnitude of the pressure applied to the film pressure sensor 20 by detecting the resistance of the film pressure sensor 20 cannot accurately detect the pressure applied to the film pressure sensor 20, and the range of the pressure that can be detected is small.

In order to improve the detection accuracy of the pressure to which the thin film pressure sensor 20 for detecting the pressure of the female pelvic floor muscles is subjected and to increase the pressure detection range as much as possible, the present invention inventively develops a new method for detecting the pressure to which the thin film pressure sensor 20 is subjected: the magnitude of the pressure experienced by the membrane pressure sensor 20 is determined by tapping the membrane pressure sensor 20 into the multivibrator 30 and configuring the multivibrator 30 such that the oscillation frequency of the multivibrator 30 corresponds to the pressure experienced by the membrane pressure sensor 20, and then detecting the oscillation frequency of the multivibrator 30. Accordingly, when the female pelvic floor muscle pressure detection system of the present invention is used to detect female pelvic floor muscle pressure, the pressure applied to the membrane pressure sensor 20 is detected by detecting the oscillation frequency of the multivibrator 30 instead of detecting the resistance of the membrane pressure sensor 20 and determining the pressure applied to the membrane pressure sensor 20 according to the resistance of the membrane pressure sensor 20. The female pelvic floor muscle pressure detection system can obviously improve the detection precision of the pressure applied to the thin film pressure sensor 20 and enlarge the pressure detection range of the thin film pressure sensor 20.

It should be noted that the multivibrator 30 of the female pelvic muscle pressure detection system according to the embodiment of the present invention is configured in advance. First, when the membrane pressure sensor 20 of the female pelvic muscle pressure detecting system according to the present invention is subjected to different pressures, the resistance (magnitude) of the membrane pressure sensor 20 determines the change of the resistance of the membrane pressure sensor 20 according to the change of the pressure, thereby determining the resistance-pressure correspondence of the membrane pressure sensor 20 and obtaining the resistance-pressure change curve of the membrane pressure sensor 20. As shown in fig. 3 of the drawings, illustratively, according to the resistance-pressure variation curve of the exemplary thin film pressure sensor 20 of the female pelvic muscle pressure detecting system according to the embodiment of the present invention, the resistance of the thin film pressure sensor 20 becomes monotonously smaller as the pressure increases, and the resistance value thereof is non-linear as the pressure changes. It will be appreciated that the resistance-pressure change curve of the membrane pressure sensor 20 of the female pelvic muscle pressure detection system of the present invention may vary from model to model, from material to material, from manufacturing process to manufacturing process, and even from manufacturer to manufacturer. Thus, FIG. 3 of the drawings shows a resistance-pressure curve of an exemplary membrane pressure sensor 20 of a female pelvic floor pressure detection system in accordance with embodiments of the present invention. When other types or classes of thin film pressure sensors 20 are used, there may be a corresponding change in the resistance-pressure change curve. Then, the multivibrator 30 is configured according to the resistance-pressure variation curve of the thin film pressure sensor 20 of the female pelvic floor muscle pressure detecting system according to the embodiment of the present invention, so that the oscillation frequency of the multivibrator 30 monotonously varies with the magnitude of the resistance of the thin film pressure sensor 20, thereby making the pressure applied to the thin film pressure sensor 20 correspond to the oscillation frequency of the multivibrator 30. Preferably, the multivibrator 30 is configured such that the oscillation frequency of the multivibrator 30 monotonically decreases as the resistance of the thin film pressure sensor 20 increases. More preferably, the equation corresponding to the resistance-oscillation frequency variation curve of the multivibrator 30 and the equation corresponding to the resistance-pressure variation curve of the thin film pressure sensor 20 are a pair of generation equations. Accordingly, when the multivibrator 30 of the female pelvic floor muscle pressure detecting system according to the embodiment of the present invention is configured such that the resistance-oscillation frequency variation curve of the multivibrator 30 and the resistance-pressure variation curve of the thin film pressure sensor 20 are positioned in the same quadrant, and the resistance-oscillation frequency variation curve of the multivibrator 30 is shifted by an appropriate distance to "coincide" with the resistance-pressure variation curve of the thin film pressure sensor 20, the oscillation frequency of the multivibrator 30 is linearly related to the pressure to which the thin film pressure sensor 20 is subjected.

FIG. 2A of the drawings shows an exemplary multivibrator 30 of a female pelvic muscle pressure detection system according to an embodiment of the present invention, wherein the multivibrator 30 includes a first resistive element 31, a second resistive element 32, an operational amplifier 33, and a capacitive element 34, wherein one end of the first resistive element 31 is electrically connected to the non-inverting input terminal of the second resistive element 32 and the non-inverting input terminal of the operational amplifier 33, the other end of the first resistive element 31 is electrically connected to the second end 22 of the thin film pressure sensor 20 and the output terminal of the operational amplifier 33, one end of the second resistive element 32 is connected to ground, the other end of the second resistive element is electrically connected to the non-inverting input terminal of the operational amplifier 33 and the first resistive element 31, one end of the capacitive element 34 is connected to ground, the other end of the capacitive element is electrically connected to the inverting input terminal of the operational amplifier 33 and the first end 21 of the thin film pressure sensor 20, the output end of the operational amplifier 33 is electrically connected to the second end 22 of the thin film pressure sensor 20 and the first resistive element 31, the inverting input end of the operational amplifier 33 is electrically connected to the first end 21 of the thin film pressure sensor 20 and the capacitive element 34, and the non-inverting input end of the operational amplifier 33 is electrically connected to the first resistive element 31 and the second resistive element 32. It will be appreciated that the first resistive element 31 and the second resistive element 32 of the exemplary multivibrator 30 of the female pelvic muscle pressure detection system according to embodiments of the present invention are each an electrical component having a resistance of a certain magnitude, which is made up of one or more components; the capacitive element 34 of the exemplary multivibrator 30 of the female pelvic floor pressure detection system according to embodiments of the present invention is an electrical component having a capacitance of a certain magnitude, which is made up of one or more components. Accordingly, there are various implementations of the exemplary multivibrator 30 of the female pelvic floor pressure detection system according to embodiments of the present invention.

As shown in fig. 5 of the drawings, when the first resistive element 31 and the second resistive element 32 of the multivibrator 30 are both single resistors and the capacitive element 34 is a single capacitor, the multivibrator 30 is configured such that the oscillation frequency F of the multivibrator 30 and the resistance Rsensor of the thin film pressure sensor 20 satisfy the following equation:

where C is the capacitance of the capacitive element 34 and R is₁Is the resistance, R, of the first resistive component 31₂Is the resistance of the second resistive component 32. Accordingly, the resistance-oscillation frequency variation curve of the multivibrator 30 and the resistance-pressure variation curve of the thin film pressure sensor 20 of the exemplary female pelvic floor pressure detecting system according to the embodiment of the present invention may coincide or approximately coincide. It is noted that the capacitive element 34 of the exemplary multivibrator 30 of the female pelvic floor muscle pressure detection system according to the embodiment of the present invention has a capacitance value of 10pF-330 uF. Through repeated tests and experiments, it is found that when the capacitance value of the capacitive element 34 is less than 10pF, the error caused by the stray capacitance in the multivibrator 30 of the female pelvic floor muscle pressure detecting system according to the embodiment of the present invention is hard to be reduced to the ideal range, and when the capacitance value of the capacitive element 34 is greater than 330uF, the volume of the capacitive element 34 is too large to satisfy the requirement of the female pelvic floor muscle pressure detecting system according to the present invention. Preferably, the capacitance of the multivibrator 30 of the female pelvic floor pressure detecting system according to the embodiment of the present invention is a COG or NPO ceramic capacitor to ensure the temperature stability of the female pelvic floor pressure detecting system according to the present invention.

As shown in fig. 6A of the drawings, when the first resistive element 31 and the second resistive element 32 of the multivibrator 30 are both single resistors and the capacitive element 34 is a single capacitor, the resistance-oscillation frequency variation curve of the multivibrator 30 and the resistance-pressure variation curve of the thin film pressure sensor 20 of the female pelvic floor muscle pressure detection system according to the embodiment of the present invention can be calculated and further (first order) linearly fitted to obtain a "linear relationship" between the oscillation frequency of the multivibrator 30 and the pressure to which the thin film pressure sensor 20 is subjected:

where N is the pressure to which the film pressure sensor 20 is subjected, F is the oscillation frequency of the multivibrator 30 detected in real time, F is the oscillation frequency of the multivibrator 30 when the pressure to which the film pressure sensor 20 is subjected is zero, and K is a constant. It will be appreciated that the constant K is related to the membrane pressure sensor 20. It will be appreciated that the "linear relationship" between the oscillation frequency of the multivibrator 30 and the pressure experienced by the membrane pressure sensor 20 may also be obtained by other linear fitting means, such as a second order fit or a multiple order fit.

It should be noted that, as shown in fig. 5 of the drawings, when the first resistive element 31 and the second resistive element 32 of the multivibrator 30 are both single resistors and the capacitive element 34 is a single capacitor, the "coincidence" of the resistance-oscillation frequency variation curve of the multivibrator 30 and the resistance-pressure variation curve of the thin film pressure sensor 20 of the female pelvic floor muscle pressure detection system according to the embodiment of the present invention is not necessarily completely coincident, but is established in that the oscillation frequency of the multivibrator 30 of the female pelvic floor muscle pressure detection system according to the embodiment of the present invention is monotonically decreased as the resistance of the thin film pressure sensor 20 increases. The main reason is that the variation of the oscillation frequency of the multivibrator 30 of the female pelvic floor muscle pressure detecting system according to the embodiment of the present invention is a simulation of the variation of the resistance of the thin film pressure sensor 20 with the pressure, and the variation of the oscillation frequency of the multivibrator 30 is difficult to be completely consistent with the variation of the resistance of the thin film pressure sensor 20 with the pressure, especially when the thin film pressure sensor 20 is subjected to a small pressure, the variation of the resistance with the pressure is large, and when the pressure is large, the variation of the resistance with the pressure is small. As shown in fig. 6A of the drawings, accordingly, the "linear relationship" between the oscillation frequency of the multivibrator 30 and the pressure applied to the thin film pressure sensor 20 of the female pelvic floor pressure detection system according to the embodiment of the present invention is calculated as a linear relationship. However, even so, by the configuration method of the multivibrator 30 of the present invention, it is possible for the user or operator to more accurately detect the female pelvic floor muscle pressure to which the thin film pressure sensor 20 is subjected through the combined use of the thin film pressure sensor 20 and the configured multivibrator 30 and to significantly increase the upper and lower limits of the female pelvic floor muscle pressure that can be detected by the thin film pressure sensor 20. Optionally, the user may further improve the "linear relationship" between the oscillation frequency of the multivibrator 30 and the pressure experienced by the thin film pressure sensor 20 by a linear fit, such as a first order linear fit or a multiple order linear fit, to provide a higher accuracy in detecting female pelvic muscle pressure.

Accordingly, when used to detect female pelvic floor muscle pressure, a user or operator may position the membrane pressure sensor 20 and the arrangement of the female pelvic floor muscle pressure detection system according to embodiments of the present invention on a suitable carrier 10, and then place the carrier 10 with the membrane pressure sensor 20 attached thereto in a suitable location within the female's body so that the female's pelvic floor muscle pressure may act on the membrane pressure sensor 20 or be transmitted to the membrane pressure sensor 20. Generally, the carrier 10 with the thin film pressure sensor 20 attached thereto is placed in the female's pelvic floor cavity (or other suitable portion of the human body) to facilitate the female's pelvic floor muscle pressure acting on the thin film pressure sensor 20. Therefore, the carrier 10 to which the thin film pressure sensor 20 is attached is preferably provided as a spherical body or a rod-shaped body that facilitates the force application. In this way, female pelvic floor muscle pressure can be detected.

As shown in fig. 1 of the drawings, the female pelvic floor pressure detection system according to the embodiment of the present invention further includes at least one micro control unit 40 and at least one analog-to-digital conversion module 50, wherein the micro control unit 40 is electrically connected to the output terminal of the multivibrator 30, the micro control unit 40 is configured to detect (or sense) the oscillation frequency of the multivibrator 30 and generate a corresponding analog signal, the analog-to-digital conversion module 50 is electrically connected to the micro control unit 40, and the analog-to-digital conversion module 50 is configured to convert the analog signal generated by the micro control unit 40 into a corresponding digital signal. Preferably, the oscillation frequency of the multivibrator 30 of the female pelvic floor muscle pressure detection system according to the embodiment of the present invention is configured to be 10Hz to 10MHz according to the requirement of female pelvic floor muscle pressure detection. When the oscillation frequency of the multivibrator 30 is too low, it is difficult to satisfy the requirement of detecting the pressure of the female pelvic floor muscles many times in a unit time and to respond to the MCU (micro control unit or single chip microcomputer) in time. In addition, the number of times of detection in unit time is small, and the error of the detection result is easy to be overlarge; when the oscillation frequency of the multivibrator 30 is too high, the performance requirement on the MCU (micro control unit or single chip microcomputer) is high, and the cost is high, resulting in unnecessary cost expenditure.

As shown in fig. 1 and 11 of the drawings, the female pelvic muscle pressure detection system according to the embodiment of the present invention further includes at least one signal transmission module 60, wherein the signal transmission module 60 is configured to transmit the digital signal generated by the analog-to-digital conversion module 50 to a client 70, so that the pressure (value) applied to the diaphragm pressure sensor 20 can be visually displayed on the client 70. Preferably, the pressure (value) to which the membrane pressure sensor 20 is subjected can be visually displayed in digital form at the client 70.

As shown in fig. 1 and 11 of the drawings, the client 70 of the female pelvic muscle pressure detection system according to the embodiment of the utility model is connected with the signal transmission module 60 in a signal-transmittable manner through an electronic communication network, so that the digital signal generated by the analog-to-digital conversion module 50 can be transmitted to the client 70 through the electronic communication network. It is understood that the electronic communication network may be a local area network, a metropolitan area network, a wide area network, a network such as the internet, a Wi-Fi network, a bluetooth network, or a local communication network connection such as USB, PCI, etc. The mcu 40 can understand that the electronic communication network can also be a mobile communication network, such as a GSM network, a CDMA network, a TD-CDMA network, a 3G network, a 4G network, a 5G network, a 6G network, or other data transmission means known to those skilled in the art. The client 70 can be any electronic device capable of displaying or visually displaying the detected data from the signal transmission module 60, such as a computer, a laptop, a smart phone, a tablet computer, and so on. The client 70 may be computerized or programmed to process and/or visualize the real-time inspection data so that a user can understand the inspection results represented by the real-time inspection data. The client 70 may also include a display for displaying the processed test data.

As shown in fig. 1 and 11 of the drawings, the female pelvic muscle pressure detection system according to the embodiment of the present invention further includes a power module 80, wherein the power module 80 is configured and adapted to supply power to the thin film pressure sensor 20, the micro control unit 40 and/or the multivibrator 30. Accordingly, the power module 80 is provided in electrical connection with the membrane pressure sensor 20, the micro-control unit 40 and/or the multivibrator 30, respectively.

As shown in fig. 1, 2A and 2B of the drawings, in order to ensure the smooth start of the multivibrator 30 of the female pelvic floor muscle pressure detecting system according to the embodiment of the present invention, especially, the oscillation can be smoothly started even when the thin film pressure sensor 20 is not under pressure, the exemplary female pelvic floor muscle pressure detecting system according to the embodiment of the present invention further includes a start resistor 90, wherein the start resistor 90 is electrically connected to the multivibrator 30 in parallel with the thin film pressure sensor 20. The trigger resistor 90 of the female pelvic floor pressure sensing system of the present invention increases the fundamental frequency (or oscillation start frequency) and the response time when the pressure value experienced by the thin film pressure sensor 20 is small.

Accordingly, the number of the first and second electrodes,

where C is the capacitance of the capacitive element 34 and R is₁Is the resistance, R, of the first resistive component 31₂Is the resistance of the second resistive component 32, Rsensor isThe resistance Rsp of the thin film pressure sensor 20 is the resistance of the start resistor 35.

As shown in fig. 2B of the drawings, in order to make the resistance-oscillation frequency variation curve of the multivibrator 30 more similar to the resistance-pressure value variation curve of the thin film pressure sensor 20 and to make the linearity between the oscillation frequency of the multivibrator 30 and the pressure to which the thin film pressure sensor 20 is subjected, the first resistive element 31, the second resistive element 32 and the capacitive element 34 of the multivibrator 30 of the exemplary female pelvic muscle pressure detection system according to the embodiment of the present invention may be further modified, wherein the capacitive element 34 of the modified multivibrator 30 includes a first resistor 341, a second resistor 342 and a first capacitor 343, the first resistive element 31 includes at least one first adjusting resistor 311, the second resistive element 32 includes at least one second adjusting resistor 321, wherein the first resistor 341 and the first capacitor 343 of the capacitive element 34 are connected in series, and the first resistor 341 is connected in parallel with the first capacitor 343 and the second resistor 342. As shown in fig. 5 of the drawings, further, the multivibrator 30 further includes a second capacitor 344, the first resistive component 31 further includes at least one first adjusting capacitor 312, the second resistive component 32 further includes at least one second adjusting capacitor 322, wherein the first resistor 341 is connected in parallel with the first capacitor 343, the second resistor 342 and the second capacitor 344, the first adjusting resistor 311 is connected in parallel with the first adjusting capacitor 312, and the second adjusting resistor 321 is connected in parallel with the second adjusting capacitor 322.

Accordingly, the number of the first and second electrodes,

where C is the capacitance of the capacitive element 34 and R is₁Is the resistance, R, of the first resistive component 31₂In terms of the resistance of the second resistive element 32, Rsensor is the resistance of the thin film pressure sensor 20, Rsp is the resistance of the trigger resistor 35, ZC1 is the capacitive impedance of the first tuning capacitor 312, and ZC2 is the capacitive impedance of the second tuning capacitor 322. As shown in FIG. 6B of the drawings, the oscillation frequency of the modified multivibrator 30Better linearity with the pressure to which the thin film pressure sensor 20 is subjected (first order fit) and higher accuracy of the detection result of the pressure to which the thin film pressure sensor 20 is subjected. It will be appreciated that the "linear relationship" between the oscillation frequency of the multivibrator 30 and the pressure experienced by the membrane pressure sensor 20 may also be obtained by other linear fitting means, such as a second order fit or a multiple order fit. As shown in fig. 2A and 6A of the drawings, when the oscillation frequency of the multivibrator 30 of the female pelvic floor muscle pressure detecting system according to the embodiment of the present invention is above 1000Hz, the error between the response curve of the multivibrator 30 and the response curve of the thin film pressure sensor 20 is significantly increased. As shown in fig. 2B and 6B of the drawings, the problem of error increase in response curve of the multivibrator 30 and the response curve of the thin film pressure sensor 20 when the oscillation frequency of the multivibrator 30 is above 1000Hz is partially overcome by introducing reactive devices, such as the first adjusting capacitor 312 and the second adjusting capacitor 322, into the feedback network, so as to make the linearity between the oscillation frequency of the multivibrator 30 and the pressure applied to the thin film pressure sensor 20 better. In addition, the first resistive element 31 and the second resistive element 32 of the exemplary multivibrator 30 of the pelvic muscle pressure detection system according to the embodiment of the present invention have a resistance of 100 ohms and 100 ohms, so that the linearity between the oscillation frequency of the multivibrator 30 and the pressure applied to the thin film pressure sensor 20 is better. It also helps to improve the linearity between the oscillation frequency of the multivibrator 30 and the pressure experienced by the thin film pressure sensor 20 when the resistances of the first resistive component 31 and the second resistive component 32 are the same in magnitude.

As shown in fig. 2A and 2B of the drawings, the exemplary multivibrator 30 of the female pelvic floor muscle pressure detecting system according to the embodiment of the present invention further includes a first potential resistor 81 and a second potential resistor 82, wherein one end of the first potential resistor 81 is pressurized, the other end is electrically connected to the second potential resistor 82 and the second resistive element 32, respectively, one end of the second potential resistor 82 is grounded, and the other end is electrically connected to the first potential resistor 81 and the second resistive element 32, respectively. As shown in FIGS. 2A and 2B of the drawings, at low frequencies, the midpoint potential of the exemplary multivibrator 30 of the female pelvic floor muscle pressure sensing system according to embodiments of the present invention is determined by the resistance of the first potential resistor 81 and the resistance of the second resistive element 32. At high frequency, the frequency error caused by the feedback current is large, and the frequency error can be reduced by adding a filter capacitor and a buffer circuit.

FIG. 7A of the drawings shows another exemplary multivibrator 30A of a female pelvic muscle pressure sensing system according to an embodiment of the present invention, wherein the multivibrator 30A includes a first resistive element 31, a second resistive element 32, a comparator 33A and a capacitive element 34, wherein one end of the first resistive element 31 is electrically connected to the second resistive element 32 and the non-inverting input of the comparator 33A, respectively, the other end of the first resistive element 31 is electrically connected to the second end 22 of the thin film pressure sensor 20 and the output of the comparator 33A, one end of the second resistive element 32 is grounded, the other end of the second resistive element is electrically connected to the non-inverting input of the comparator 33A and the first resistive element 31, the other end of the capacitive element 34 is electrically connected to the inverting input of the comparator 33A and the first end 21 of the thin film pressure sensor 20, respectively, the output terminal of the comparator 33A is electrically connected to the second terminal 22 of the thin film pressure sensor 20 and the first resistive element 31, the inverting input terminal of the comparator 33A is electrically connected to the first terminal 21 of the thin film pressure sensor 20 and the capacitive element 34, and the non-inverting input terminal of the comparator 33A is electrically connected to the first resistive element 31 and the second resistive element 32. It will be appreciated that the first resistive element 31 and the second resistive element 32 of the exemplary multivibrator 30A of a female pelvic muscle pressure detection system according to embodiments of the present invention are each an electrical component having a resistance of a certain magnitude, which is made up of one or more components; the capacitive element 34 of the exemplary multivibrator 30A of the female pelvic floor pressure detection system according to embodiments of the present invention is an electrical component having a capacitance of a certain magnitude, which is made up of one or more components. Accordingly, there are various implementations of the exemplary multivibrator 30A of the female pelvic floor pressure detection system according to embodiments of the present invention.

As shown in fig. 8A of the drawings, when the first resistive element 31 and the second resistive element 32 of the multivibrator 30A are both single resistors and the capacitive element 34 is a single capacitor, the multivibrator 30A is configured such that the oscillation frequency F of the multivibrator 30A and the resistance Rsensor of the thin film pressure sensor 20 satisfy the following equation:

where C is the capacitance of the capacitive element 34 and R is₁Is the resistance, R, of the first resistive component 31₂Is the resistance of the second resistive component 32. Accordingly, the resistance-oscillation frequency variation curve of the multivibrator 30A and the resistance-pressure variation curve of the thin film pressure sensor 20 of the exemplary female pelvic floor pressure detecting system according to the embodiment of the present invention coincide or approximately coincide. It is noted that the capacitive element 34 of the exemplary multivibrator 30A of the female pelvic floor muscle pressure detection system according to the embodiment of the present invention has a capacitance value of 10pF-330 uF. Through repeated tests and experiments, it is found that when the capacitance value of the capacitive element 34 is less than 10pF, the error caused by the stray capacitance in the multivibrator 30A of the female pelvic floor muscle pressure detecting system according to the embodiment of the present invention is hard to be reduced to the ideal range, and when the capacitance value of the capacitive element 34 is greater than 330uF, the volume of the capacitive element 34 is too large to satisfy the requirement of the female pelvic floor muscle pressure detecting system according to the present invention. Preferably, the capacitance of the multivibrator 30A of the female pelvic floor pressure detecting system according to the embodiment of the present invention is a COG or NPO ceramic capacitor to ensure the temperature stability of the female pelvic floor pressure detecting system according to the present invention.

As shown in fig. 8A of the drawings, when the first resistive element 31 and the second resistive element 32 of the multivibrator 30A are both single resistors and the capacitive element 34 is a single capacitor, the "linear relationship" between the oscillation frequency of the multivibrator 30A and the pressure to which the thin film pressure sensor 20 is subjected can be obtained by calculating and further (first order) linear fitting the resistance-oscillation frequency variation curve of the multivibrator 30A and the resistance-pressure variation curve of the thin film pressure sensor 20 of the female pelvic floor muscle pressure detection system according to the embodiment of the present invention:

where N is the pressure to which the film pressure sensor 20 is subjected, F is the oscillation frequency of the multivibrator 30A detected in real time, F is the oscillation frequency of the multivibrator 30A when the pressure to which the film pressure sensor 20 is subjected is zero, and K is a constant. It will be appreciated that the constant K is related to the membrane pressure sensor 20. It will be appreciated that the "linear relationship" between the oscillation frequency of the multivibrator 30A and the pressure experienced by the thin film pressure sensor 20 may also be obtained by other linear fitting means, such as a second order fit or a multiple order fit.

It is noted that when the first resistive element 31 and the second resistive element 32 of the multivibrator 30A are both single resistors and the capacitive element 34 is a single capacitor, the "coincidence" of the resistance-oscillation frequency variation curve of the multivibrator 30A and the resistance-pressure variation curve of the thin film pressure sensor 20 of the female pelvic floor muscle pressure detection system according to the embodiment of the present invention does not necessarily coincide completely, but is established in that the oscillation frequency of the multivibrator 30A of the female pelvic floor muscle pressure detection system according to the embodiment of the present invention monotonically decreases as the resistance of the thin film pressure sensor 20 increases. The main reason is that the variation of the oscillation frequency of the multivibrator 30A of the female pelvic floor muscle pressure detecting system according to the embodiment of the present invention is a simulation of the variation of the resistance of the thin film pressure sensor 20 with the pressure variation, and the variation of the oscillation frequency of the multivibrator 30A is difficult to be completely consistent with the variation of the resistance of the thin film pressure sensor 20 with the pressure variation, especially when the thin film pressure sensor 20 is subjected to a small pressure, the variation of the resistance with the pressure variation is large, and when the pressure is subjected to a large pressure, the variation of the resistance with the pressure variation is small. As shown in fig. 8A of the drawings, accordingly, the "linear relationship" between the oscillation frequency of the multivibrator 30A and the pressure applied to the thin film pressure sensor 20 of the female pelvic floor pressure detecting system according to the embodiment of the present invention is calculated as a linear relationship. However, even so, by the configuration method of the multivibrator 30A of the present invention, it is possible for the user or operator to more accurately detect the female pelvic floor muscle pressure to which the thin film pressure sensor 20 is subjected by the combined use of the thin film pressure sensor 20 and the configured multivibrator 30A and to significantly increase the upper and lower limits of the female pelvic floor muscle pressure that can be detected by the thin film pressure sensor 20. Optionally, the user may further improve the "linear relationship" between the oscillation frequency of the multivibrator 30A and the pressure experienced by the thin film pressure sensor 20 by a linear fit, such as a first order linear fit or a multiple order linear fit, to provide a higher accuracy in detecting female pelvic muscle pressure.

As shown in FIGS. 7A and 7B of the drawings, in order to ensure the smooth start of the multivibrator 30A of the female pelvic floor muscle pressure detecting system according to the embodiment of the present invention, especially to start the oscillation when the thin film pressure sensor 20 is not under pressure, the female pelvic floor muscle pressure detecting system of the present invention further includes a start resistor 90, wherein the start resistor 90 is electrically connected to the multivibrator 30A in parallel with the thin film pressure sensor 20

Accordingly, the number of the first and second electrodes,

where C is the capacitance of the capacitive element 34 and R is₁Is the resistance, R, of the first resistive component 31₂As the resistance of the second resistive element 32, Rsensor is the resistance of the thin film pressure sensor 20, and Rsp is the resistance of the actuation resistor 35.

As shown in FIG. 7B of the drawings, in order to make the resistance-oscillation frequency variation curve of the multivibrator more similar to the resistance-pressure value variation curve of the film pressure sensor 20, embodiments of the present invention can be modifiedThe exemplary first resistive element 31, second resistive element 32, and capacitive element 34 of the multivibrator 30A of the female pelvic floor pressure detection system of (1) is further improved, wherein the improved capacitive element 34 of the multivibrator 30A includes a first resistor 341, a second resistor 342, and a first capacitor 343, the first resistive element 31 includes at least one first tuning resistor 311, the second resistive element 32 includes at least one second tuning resistor 321, wherein the first resistor 341 and the first capacitor 343 of the capacitive element 34 are connected in series, and the first resistor 341 and the first capacitor 343 and the second resistor 342 are connected in parallel. As shown in fig. 7B of the drawings, further, the multivibrator 30A further includes a second capacitor 344, the first resistive element 31 further includes at least one first adjusting capacitor 312, the second resistive element 32 further includes at least one second adjusting capacitor 322, wherein the first resistor 341 is connected in parallel with the first capacitor 343, the second resistor 342 and the second capacitor 344, the first adjusting resistor 311 is connected in parallel with the first adjusting capacitor 312, and the second adjusting resistor 321 is connected in parallel with the second adjusting capacitor 322. Accordingly, the number of the first and second electrodes,

where C is the capacitance of the capacitive element 34 and R is₁Is the resistance, R, of the first resistive component 31₂In terms of the resistance of the second resistive element 32, Rsensor is the resistance of the thin film pressure sensor 20, Rsp is the resistance of the trigger resistor 35, ZC1 is the capacitive impedance of the first tuning capacitor 312, and ZC2 is the capacitive impedance of the second tuning capacitor 322. As shown in fig. 8B of the drawings, the improved linearity between the oscillation frequency of the multivibrator 30A and the pressure to which the thin film pressure sensor 20 is subjected (first order fit) is better and the accuracy of the detection result of the pressure to which the thin film pressure sensor 20 is subjected is higher. It will be appreciated that the "linear relationship" between the oscillation frequency of the multivibrator 30A and the pressure experienced by the thin film pressure sensor 20 may also be obtained by other linear fitting means, such as a second order fit or a multiple order fit. As shown in FIGS. 7A and 8A of the drawings, the multivibrator 30A has an oscillation frequency of 1000Hz or higherThe response curve of the multivibrator 30A has a significantly increased error from the response curve of the thin film pressure sensor 20. As shown in fig. 7B and 8B of the drawings, by introducing reactive devices, such as the first tuning capacitor 312 and the second tuning capacitor 322, into the feedback network, the feedback coefficient of the multivibrator 30A changes with the oscillation frequency, so as to reduce the error between the response curve of the multivibrator 30A and the response curve of the thin film pressure sensor 20 when the oscillation frequency of the multivibrator 30A is above 1000Hz, and to improve the linearity between the oscillation frequency of the multivibrator 30A and the pressure applied to the thin film pressure sensor 20.

As shown in fig. 7A and 7B of the drawings, the exemplary multivibrator 30 of the female pelvic floor muscle pressure detecting system according to the embodiment of the present invention further includes a first potential resistor 81 and a second potential resistor 82, wherein one end of the first potential resistor 81 is pressurized, the other end is electrically connected to the second potential resistor 82 and the second resistive element 32, respectively, one end of the second potential resistor 82 is grounded, and the other end is electrically connected to the first potential resistor 81 and the second resistive element 32, respectively. As shown in FIGS. 2A and 2B of the drawings, at low frequencies, the midpoint potential of the exemplary multivibrator 30 of the female pelvic floor muscle pressure sensing system according to embodiments of the present invention is determined by the resistance of the first potential resistor 81 and the resistance of the second resistive element 32. At high frequency, the frequency error caused by the feedback current is large, and the frequency error can be reduced by adding a filter capacitor and a buffer circuit.

FIG. 9 of the drawings illustrates another exemplary multivibrator 30B of a female pelvic floor muscle pressure detection system according to an embodiment of the present invention, wherein the multivibrator 30B includes a first resistor 31B, a second resistor 32B, a Schmidt trigger 33B and a first electrical component 34B, wherein the first electrical component 34B includes a first capacitor 341B and a series resistor 343B, wherein one end of the first resistor 31B is electrically connected to the output terminal of the Schmidt trigger 33B, the other end is electrically connected to the first electrical component 34B and the second resistor 32B, respectively, one end of the second resistor 32B is electrically connected to the input terminal of the Schmidt trigger 33B, the other end is electrically connected to the first electrical component 34B and the first resistor 31B, respectively, one end of the first electrical component 34B is electrically connected to the first resistor 31B and the second resistor 32B, respectively, the other end of the first electrical component 34B is grounded, wherein the series resistor 343B of the first electrical component 34B is connected in series with the thin film pressure sensor 20, the first end 21 of the thin film pressure sensor 20 is electrically connected to the first resistor 31B, the second end 22 of the thin film pressure sensor 20 is grounded, one end of the series resistor 343B is electrically connected to the first resistor 31B and the second resistor 32B, respectively, the other end of the series resistor 343B is electrically connected to the first end 21 of the thin film pressure sensor 20, one end of the first capacitor 341B is electrically connected to the first resistor 31B and the second resistor 32B, respectively, and the other end of the first capacitor 341B is electrically connected to the second end 22 of the thin film pressure sensor 20. As shown in fig. 9 of the drawings, further, the multivibrator 30B of another exemplary female pelvic floor muscle pressure detecting system according to the embodiment of the present invention further includes a second capacitor 342, wherein the second capacitor 342 is connected in parallel with the thin film pressure sensor 20. In other words, as shown in fig. 9 of the drawings, one end of the two capacitors 342B is electrically connected to the first end 21 of the thin film pressure sensor 20 and the second resistor 32B, and the other end is electrically connected to the second end 22 of the thin film pressure sensor 20. As shown in fig. 9 and 10 of the drawings, the multivibrator 30B is simpler and less expensive in structure than the multivibrator 30 and the multivibrator 30A described above, but the multivibrator 30B has a slightly inferior linearity between the oscillation frequency and the pressure applied to the thin film pressure sensor 20. As shown in fig. 9 and 10 of the drawings, the resistance of the thin film pressure sensor 20 of the female pelvic muscle pressure detection system according to the embodiment of the present invention monotonically decreases as the pressure to which it is subjected increases, and the multivibrator 30B is configured such that its oscillation frequency monotonically increases as the resistance of the thin film pressure sensor 20 increases.

As shown in fig. 9 of the drawings, the multivibrator 30B of the female pelvic floor muscle pressure detecting system according to the embodiment of the present invention further includes a first electronic element 361, a second electronic element 362 and a third electronic element 363, wherein one end of the first electronic element 361 is electrically connected to a reference point, the other end of the first electronic element 361 is electrically connected to the output terminal of the schmitt trigger 33B, one end of the second electronic element 362 is electrically connected to a reference point, the other end of the second electronic element 362 is electrically connected to the output terminal of the schmitt trigger 33B, one end of the third electronic element 363 is electrically connected to a reference point, and the other end of the third electronic element 363 is electrically connected to the output terminal of the schmitt trigger 33B. Preferably, the first electronic element 361 is a diode, the second electronic element 362 is a capacitor, and the third electronic element 363 is a resistor.

Utility model practical novel

It is noted that the terms "first", "second" and/or "third" herein are used merely to name and distinguish between different components (or elements) of the utility model, and do not have an ordinal or quantitative meaning per se.

It will be understood by those of ordinary skill in the art that the embodiments described above and shown in the drawings are merely for illustrative purposes and are not intended to limit the present invention. All equivalent implementations, modifications and improvements that are within the spirit of the utility model are intended to be included within the scope of the utility model.

Claims

1. A multivibrator for a female pelvic muscle pressure detection system, comprising:

a first resistive component;

a second resistive component;

an operational amplifier; and

a capacitive component, wherein one end of the first resistive component is electrically connected to the second resistive component and the non-inverting input terminal of the operational amplifier, and the other end is electrically connected to the output terminal of the operational amplifier, one end of the second resistive component is grounded, the other end is electrically connected to the non-inverting input terminal of the operational amplifier and the first resistive component, one end of the capacitive component is grounded, the other end is electrically connected to the inverting input terminal of the operational amplifier, the output terminal of the operational amplifier is electrically connected to the first resistive component, the inverting input terminal of the operational amplifier is electrically connected to the capacitive component, the non-inverting input terminal of the operational amplifier is electrically connected to the first resistive component and the second resistive component, the capacitive component comprises a first capacitor, a first resistor and a second resistor, the first resistive component comprises at least a first adjusting resistor, the second resistive element comprises at least one second adjusting resistor, wherein the first resistor of the capacitive element is connected in series with the first capacitor, and the first resistor is connected in parallel with the first capacitor and the second resistor.

2. The multivibrator of claim 1, wherein the capacitive element further comprises a second capacitor, the first resistive element further comprising at least one first tuning capacitor, the second resistive element further comprising at least one second tuning capacitor, wherein the first resistor is connected in parallel with the first capacitor, the second resistor, and the second capacitor, the first tuning resistor is connected in parallel with the first tuning capacitor, and the second tuning resistor is connected in parallel with the second tuning capacitor.

3. The multivibrator of claim 1 or 2, further comprising a start resistor, wherein one end of the first resistive element is electrically connected to the second resistive element and the non-inverting input terminal of the operational amplifier, and the other end of the first resistive element is electrically connected to the start resistor and the output terminal of the operational amplifier, one end of the capacitive element is grounded, the other end of the capacitive element is electrically connected to the inverting input terminal of the operational amplifier and the start resistor, the output terminal of the operational amplifier is electrically connected to the start resistor and the first resistive element, and the inverting input terminal of the operational amplifier is electrically connected to the start resistor and the capacitive element.

4. A multivibrator for a female pelvic floor muscle pressure detection system, comprising:

a first resistive component;

a second resistive component;

a comparator; and

5. The multivibrator of claim 4, wherein the capacitive element comprises a first capacitor, a first resistor, and a second resistor, the first resistive element comprising at least one first tuning resistor, the second resistive element comprising at least one second tuning resistor, wherein the first resistor and the first capacitor of the capacitive element are connected in series, and the first resistor and the first capacitor and the second resistor are connected in parallel.

6. The multivibrator of claim 5, wherein the capacitive element further comprises a second capacitor, the first resistive element further comprising at least one first tuning capacitor, the second resistive element further comprising at least one second tuning capacitor, wherein the first resistor is connected in parallel with the first capacitor, the second resistor, and the second capacitor, the first tuning resistor is connected in parallel with the first tuning capacitor, and the second tuning resistor is connected in parallel with the second tuning capacitor.

7. The multivibrator of claim 4, 5 or 6, further comprising a start resistor, wherein one end of the first resistive element is electrically connected to the second resistive element and the non-inverting input of the operational amplifier, the other end of the first resistive element is electrically connected to the start resistor and the output of the operational amplifier, one end of the capacitive element is grounded, the other end of the capacitive element is electrically connected to the inverting input of the operational amplifier and the start resistor, the output of the operational amplifier is electrically connected to the start resistor and the first resistive element, and the inverting input of the operational amplifier is electrically connected to the start resistor and the capacitive element.

8. A multivibrator for a female pelvic floor muscle pressure detection system, comprising:

a first resistor;

a second resistor;

a Schmitt trigger; and

9. The multivibrator of claim 8, wherein the first electrical component further comprises a second capacitor, wherein one end of the second capacitor is electrically connected to the second resistor and the other end of the second capacitor is grounded.