CN114287923B

CN114287923B - Flexible abdominal patch and method for detecting user state by using same

Info

Publication number: CN114287923B
Application number: CN202111639675.7A
Authority: CN
Inventors: 徐源鸿
Original assignee: Pigeon Shanghai Co Ltd; Pigeon Industries Changzhou Co Ltd
Current assignee: Pigeon Shanghai Co Ltd; Pigeon Industries Changzhou Co Ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2023-08-25
Anticipated expiration: 2041-12-29
Also published as: CN114287923A

Abstract

The invention discloses a flexible abdomen patch and a method for detecting a user state by using the flexible abdomen patch. The flexible abdominal patch includes a skin layer, a coating layer, and a pressure sensing device. The skin layer can be attached to the skin of the abdomen of the user. The cladding isolation layer is arranged on the isolation layer on the opposite side of the skin-pasting layer far away from the skin of a user. The pressure sensing device is embedded in the coating layer and attached to the skin attaching layer. The pressure sensing device is configured to sense a pressure change in the abdomen of the user to send an alert signal indicative of an abnormality in the user's condition. The invention utilizes the pressure sensing device to detect the change of the abdominal pressure of the user, thereby detecting whether the user has abnormal conditions such as defecation, asthma and the like in time.

Description

Flexible abdominal patch and method for detecting user state by using same

Technical Field

The present invention relates to a flexible abdominal patch and a method for detecting a user's condition using the flexible abdominal patch.

Background

Disposable absorbent articles are widely used for infants and adults with lost self-care ability to effectively prevent clothes and pants from being stained with urine, feces, etc. Parents, children or other caregivers need to check whether the user has performed a discharge activity by directly smelling or removing pants to confirm whether the disposable absorbent article needs to be replaced or whether the cleaning needs to be performed. It is apparent that there are a number of inconveniences in this way and that the time for the caregiver to obtain the relevant information is severely delayed.

Along with the development of technology, part of intelligent disposable products have the urine detection function. For example, paper diapers as disclosed in documents CN106983604a, CN203539549U are provided with an impedance sensor inside. Under the condition that urine appears, the resistance in the paper diaper changes, and then the impedance sensor generates signals. The signal is sent to the mobile phone APP through the externally worn electronic element, so that nursing staff can timely find urination behaviors. However, in the case of urination, the resistance in the diaper does not change significantly, so that the diaper cannot monitor urination.

Document TW201124119A1 discloses a detection device for detecting bowel movement by means of a temperature difference, however, such a detection device has a large volume and is not practical. In addition, in order to equip such a detecting device, the disposable absorbent article needs to be provided with a special structure. Therefore, this type of detection device does not have good practicality.

In addition, document CN107049611a discloses the use of odour sensors, such as ammonia and hydrogen sulphide sensors, to detect bowel movement. However, such odor sensors are expensive and require an additional power source to supply power, and thus do not have good practicality.

Disclosure of Invention

It is an object of the present invention to provide a flexible abdominal patch which solves at least one of the above problems, and which facilitates monitoring of the condition of the body when the absorbent article is in use.

The invention aims at realizing the following technical scheme: the flexible abdominal patch includes a skin layer, a coating layer, and a pressure sensing device. The skin layer can be attached to the skin of the abdomen of the user. The coating layer is disposed on an opposite side of the skin-friendly layer away from the skin of the user. The pressure sensing device is embedded in the coating layer and attached to the skin attaching layer. The pressure sensing device is configured to sense a pressure change in the abdomen of the user to send an alert signal indicative of an abnormality in the user's condition.

Unlike the conventional mode of detecting defecation, the present invention detects changes in the abdominal pressure of the user by means of the pressure sensing device, and further detects whether the user has defecation, asthma, etc. The pressure sensing device can synchronously detect the corresponding conditions of the user when the user urinates and asthma occur, so that nursing staff can timely find out abnormal information of the user.

The coating layer can be designed in a single layer or in multiple layers.

According to a preferred embodiment of the present invention, the coating layer includes:

a flexible substrate layer disposed proximate to the skin layer, the pressure sensing device being embedded in the flexible substrate layer;

the isolation layer is arranged on one side, which is farthest from the skin-sticking layer, of the flexible substrate layer, namely on one side, which is far away from the skin-sticking layer, of the flexible substrate layer, so that external influences are isolated.

As a flexible substrate layer, it may encapsulate the pressure sensing device, thus avoiding the pressure sensing device from being disturbed by the outside, such as friction and compression of clothing. The pressure sensing means can thus only be used for detecting pressure data representing the state of the user, due to the presence of the flexible substrate layer side.

According to a preferred embodiment of the present invention, the pressure sensing apparatus includes:

a pressure detection module attached to the skin layer and configured to be capable of generating an electrical signal in response to a pressure change of the user's abdomen;

and the signal processing module is in communication connection with the pressure detection module and is configured to receive and process the electric signals so as to judge whether the state of the user is abnormal.

According to a preferred embodiment of the invention, the signal processing module is configured to be able to:

noise reduction processing is carried out on the electric signal to generate a filtered signal;

comparing the filtered signal with a pre-stored reference signal, wherein the reference signal characterizes that a user is in a normal state; and

determining whether a difference exists between the filtered signal and the reference signal,

when the difference exists, the pressure sensing device outputs a warning signal to the outside.

According to a preferred embodiment of the present invention, the skin-contacting layer is a gel layer having biocompatibility.

According to a preferred embodiment of the invention, the isolation layer is provided with fastening means for fastening the flexible abdominal patch at the abdomen of the user. The fastening means are for example a combination of release paper backing and release paper or are made of velcro. Of course, other securing means are also contemplated.

According to a preferred embodiment of the present invention, the flexible abdominal patch further comprises a transmitting module embedded in the coating layer, and the transmitting module is respectively in communication connection with the pressure sensing device and an external terminal device, so as to transmit the warning signal to the terminal device.

Preferably, in case the cover layer is composed of a flexible substrate layer and an isolating layer, the emitting module may be embedded within the flexible substrate layer. In this case, the flexible substrate layer is arranged between the skin layer and the release layer.

According to a preferred embodiment of the invention, the pressure detection module is a piezoelectric sensor.

In addition, the present disclosure also relates to a method for detecting a user's condition using any of the above flexible abdominal patches, the method comprising the steps of:

collecting an electrical signal generated in response to a pressure change of the abdomen of the user;

comparing the filtered signal with a pre-stored reference signal, wherein the reference signal characterizes that a user is in a normal state;

and outputting a warning signal to the outside when a difference exists between the filtering signal and the reference signal.

According to a preferred embodiment of the invention, the frequency of the corresponding waveform of the reference signal is 20-35 times/min, the amplitude is 0.2-0.45V, and the power is 0.85W-7.08W.

According to a preferred embodiment of the present invention, wavelet analysis is employed for noise reduction processing.

According to a preferred embodiment of the present invention, a waveform corresponding to the reference signal is filtered in the noise reduction process.

According to a preferred embodiment of the invention, when the waveform of the filtered signal is a first waveform, the frequency of the first waveform is 15 times/min-18 times/min, the amplitude is 0.14-0.18V, and the power is 0.28W-0.55W, a signal representing that the user has defecation occurs is sent to the outside.

According to a preferred embodiment of the invention, when the filtered signal of the first waveform is acquired 5-11 times, a signal is sent to the outside indicating that diarrhea has occurred in the user.

According to a preferred embodiment of the present invention, when the waveform of the filtered signal is a second waveform, a signal representing the occurrence of asthma in the user is sent to the outside, wherein the second waveform has a first wave band, and adjacent wave troughs of the first wave band correspond to the waveforms with frequencies of 40-75 times/min, amplitudes of 0.5-0.7V and powers of 10W-36.8W.

According to a preferred embodiment of the invention, when the second waveform also has a second wave band, a signal is sent to the outside, wherein the frequency of the corresponding waveform of the adjacent wave trough of the second wave band is 10-20 times/min, the amplitude is 0.1-0.15V, and the power is 0.1-0.45W.

On the basis of the common sense in the art, the above preferred embodiments can be arbitrarily combined to obtain each preferred embodiment of the present invention. Other systems, methods, features and advantages of the invention will be or become apparent to one with skill in the art upon examination of the following figures and detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description and this summary, be within the scope of the invention, and be protected by the accompanying claims.

Drawings

For a better understanding of the above and other objects, features, advantages and functions of the present invention, reference should be made to the preferred embodiments illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings. It will be appreciated by persons skilled in the art that the drawings are intended to schematically illustrate preferred embodiments of the invention, and that the scope of the invention is not limited in any way by the drawings, and that the various components are not drawn to scale.

Fig. 1 is a schematic cross-sectional view of a flexible abdominal patch of the invention.

Fig. 2 is a schematic diagram of a flexible abdominal patch of the present invention.

Fig. 3 is a flow chart of a method of detecting a user's condition using a flexible abdominal patch of the present invention.

Fig. 4 is a waveform diagram of a reference signal corresponding to an exemplary normal breath.

Fig. 5 is a waveform diagram corresponding to the filtered signal in an exemplary mild asthma condition.

Fig. 6 is a waveform diagram corresponding to a filtered signal in an exemplary severe asthma state.

Fig. 7 is a waveform diagram corresponding to the filtered signal in the schematic normal defecation state.

Fig. 8 is a waveform diagram corresponding to the filtered signal in the exemplary diarrhea state.

Detailed Description

The inventive concept of the present invention will be described in detail with reference to the accompanying drawings. What has been described herein is merely a preferred embodiment according to the present invention, and other ways of implementing the invention will occur to those skilled in the art on the basis of the preferred embodiment, and are intended to fall within the scope of the invention as well. In the following detailed description, directional terms, such as "upper", "lower", "inner", "outer", "longitudinal", "transverse", etc., are used with reference to the directions described in the drawings. The components of embodiments of the present invention can be positioned in a number of different orientations and the directional terminology is used for purposes of illustration and is in no way limiting.

In a normal breathing state, the abdomen undulation frequency and amplitude of the infant are in a stable state, and in abnormal states such as defecation and asthma, the abdomen can generate unstable undulation along with the variation of the infant breathing. The applicant devised the following flexible abdominal patch based on this finding.

Referring to the schematic cross-sectional view of the flexible abdominal patch 100 shown in fig. 1, and the construction diagram of the flexible abdominal patch 100 shown in fig. 2, the flexible abdominal patch 100 includes a skin layer 10, a cover layer 20, and a pressure sensing device 30. The skin layer 10 can be applied to the skin of the abdomen of the user. The skin layer 10 is a biocompatible gel layer having a certain tackiness. When the user attaches the skin layer 10 to the skin (abdomen) of the user, it can ensure that the flexible abdominal patch 100 is firmly attached. The gel layer may be a conventional gel and will not be described in detail herein.

The cover layer 20 is disposed on the opposite side of the skin layer 10 from the skin of the user. The coating 20 may be designed in a single layer or in multiple layers. In the schematic cross-sectional view as in fig. 1, the cover layer 20 is composed of a plurality of layers, specifically, a flexible base layer 21 and an isolation layer 22, wherein the flexible base layer 21 is disposed immediately adjacent to the skin layer 10, and a pressure sensing device 30 (described below) is embedded in the flexible base layer 21.

The isolation layer 22 is provided on the side furthest from the skin layer 10 to isolate external influences, such as, in a storage state, at least partially prevent external moisture or the like from entering the interior of the flexible abdominal patch 100 to affect the service life and detection accuracy of the pressure sensing device 30. Additionally, the barrier layer 22 may also be used to attach absorbent articles. To this end, the release layer 22 may be provided with a release paper backing and release paper combination. For example, a release paper backing adhesive may be provided on the side of the release layer 22 facing the skin layer 10. Or the isolation layer 22 may be provided with velcro. This allows the flexible abdominal patch 100 to be easily attached to the side abdomen of an absorbent article and used multiple times.

The pressure sensing device 30 is configured to sense pressure changes in the abdomen of the user to send an alert signal indicative of an abnormality in the user's condition. The pressure sensing device 30 is embedded within the cover 20 and attached to the skin layer 10. More specifically, the pressure sensing device 30 may be embedded within the flexible substrate layer 21 of the cover layer 20 and attached to the skin layer 10 to achieve better accuracy. Thereby, the pressure sensing device 30 can avoid interference effects such as friction effects and compression effects of the clothing. Due to the presence of the flexible substrate layer 21, the detection head of the sensor of the pressure sensing device 30 is attached to the skin layer 10, so that the detected data can truly represent the abdominal pressure data of the user's state.

The pressure sensing device 30 may be composed of a pressure detection module 31 and a signal processing module 32 shown in fig. 1, etc. Wherein the pressure detection module 31 is attached to the skin layer 10 and is configured to be able to generate an electrical signal in response to a pressure change of the user's abdomen. The pressure detection modules 31 may be provided in groups on the skin layers 10 at different positions so as to detect changes in abdominal pressure at different positions. The pressure detection module 31 is preferably a piezoelectric sensor that does not require external power. When a user such as an infant experiences defecation, asthma, etc., his breathing is significantly changed and causes a fluctuation in the abdomen, eventually resulting in the pressure detection module 31 attached to the skin of the abdomen detecting a changed pressure. Under the action of the undulating abdomen, charge transfer occurs in the pressure detection module 31 to generate an electric signal that can represent whether the current state of the user is abnormal.

The signal processing module 32 is communicatively connected to the pressure detection module 31 and is configured to receive and process the electrical signals to determine whether an abnormality has occurred in the user's state. Specifically, the signal processing module 32 can process the electrical signal by:

and step I, performing noise reduction processing on the electric signal to generate a filtered signal. In this step, the noise reduction processing is performed by wavelet analysis, so that the band corresponding to the surrounding noise is decomposed and filtered.

Step II, the filtered signal is then compared with a pre-stored reference signal, wherein the reference signal characterizes the user as being in a normal state. According to the statistical analysis of the applicant, when the user such as an infant is in a normal breathing state, the frequency of the output waveform obtained by the signal processing module 32 performing noise reduction processing on the electric signal detected by the pressure detection module 31 is 20-35 times/min, the amplitude is 0.2-0.45V, and the power is 0.85W-7.08W. The signal having the frequency, amplitude, and power is set as a reference signal. Referring to fig. 4, a waveform of a reference signal is shown. In the waveform of FIG. 4, the frequency was 32 times/min, the amplitude was 0.25V, and the period was 1.8 seconds.

And III, judging whether a difference exists between the filtered signal and the reference signal. When there is a difference, that is, the signal filtered by the signal processing module 32 indicates that the user is in an abnormal state, the pressure sensing device 30 outputs an alarm signal to the outside. The warning may be shown by any signal that serves as a warning, such as sound, light, vibration, etc., of an audible and visual alarm unit integrated on the flexible abdominal patch 100, and may also alert the caregiver through an external terminal device (e.g., a mobile phone, or communication with a mobile phone, etc.).

For the flexible abdominal patch 100 provided with the plurality of pressure detection modules 31, the signal processing module 32 comprehensively analyzes different electric signals collected from different pressure detection modules 31 to perform a averaging process on the respective electric signals. For example, the least stable of all electrical signals is removed and the remaining electrical signals are averaged. Therefore, the signal processing unit can perform subsequent noise reduction processing on the information which most shows the real pressure change of the abdomen.

When the warning signal is transmitted through an external terminal device, the flexible abdominal patch 100 may be embedded with a transmitting module 40 located within the coating 20 or within the flexible substrate layer 21 of the coating 20 and communicatively connected to the pressure sensing device 30, the external terminal device, respectively. The transmitting signal may be a conventional wireless signal transmitting module 40, and the warning signal is transmitted to the terminal device by wireless transmission.

During the occurrence of excretion, asthma, etc., the applicant has found that the user may breathe normally in some time during which the band corresponding to normal breathing is fed back to the filtered signal filtered by the signal processing module 32, so that the filtered signal is displayed as a reference signal, and the flexible abdominal patch 100 may be misaligned. In order to avoid this, it is preferable that in the above-described step I of the noise reduction processing of the signal processing module 32, the waveform corresponding to the reference signal is subjected to the filtering processing. In this case, the reference signal component will no longer be present in the filtered signal.

In different abnormal states (e.g. different bowel movements, asthma states) the abdomen will fluctuate with different frequencies and amplitudes, so that the signal processing module 32 outputs different filtered signals. Fig. 5 shows waveforms of the filtered signal in a state where the user suffers from mild asthma, and as can be seen from fig. 5, in a case where the user breathes with an increased frequency, the frequency of the abdomen-to-patch pressure waveform is significantly increased compared to that in normal breathing, and an irregular breathing waveform occurs. A band with a period of 0.8 seconds, a respiratory rate of 48 beats per minute, and an amplitude of 0.55V can be seen in the corresponding waveform of one exemplary mild asthma of fig. 5. It can be seen that in the case of mild asthma, waveforms with larger amplitudes appear in the filtered signal.

Referring to the waveform of the filtered signal shown in fig. 6, which corresponds to the occurrence of severe asthma in the user, in the case of severe asthma in the user, the period of the waveform is significantly lengthened. One of the bands contained a waveform with a period of 3.2 seconds, a respiratory rate of 18 times/min per minute, and an amplitude of 0.12V.

Overall, asthmatics exhale longer and respiratory rate becomes faster, but serious persons breathe less and even pause, so the filtered signal corresponding to asthma is divided into two cases. Specifically, according to the present disclosure, when the waveform of the filtered signal contains a first band of frequencies 40-75 times/min, amplitudes 0.5-0.7V, and powers 10W-36.8W for adjacent trough corresponding waveforms, the filtered signal indicates that the user is mildly asthmatic. And when the second waveform has a second wave band with the frequency of 10-20 times/min, the amplitude of 0.1-0.15V and the power of 0.1-0.45W of the corresponding waveform of the adjacent wave trough, the filtered signal indicates that the user is severely asthmatic.

Referring to the waveform of the filtered signal shown in fig. 7, which corresponds to the user in a normal defecation state, in the case where the user has a normal defecation, the frequency of the waveform is slightly reduced and the power is also reduced. In the example of fig. 7, the waveform frequency corresponding to normal defecation suddenly decreases from the waveform frequency in the normal breathing state to 16 times/min, the amplitude becomes 0.14-0.16V, and the corresponding power becomes 0.15W. In general, the filtered signal characterizes the user as being in a bowel movement state when the waveform of the filtered signal is a first waveform having a frequency of 15 times/min to 18 times/min, an amplitude of 0.14 to 0.18V, and a power of 0.28W to 0.55W.

See the waveform of the filtered signal shown in fig. 8 corresponding to the user in an abnormal defecation (diarrhea) state. The waveform corresponding to abnormal defecation is similar to that at defecation, but the waveform becomes more complex. Specifically, the filtered signal in the abnormal defecation (diarrhea) state occurs for a longer number of times than the filtered signal in the normal defecation state, and these waveforms have larger peaks. According to the inventors' experiments, it was shown that diarrhea occurred in the user when 5-11 filtered signals of the above first waveform were continuously collected.

For the flexible abdominal patch 100 of the present disclosure, it is preferably attached to one side of the skin adjacent to the navel. After the disposable sanitary article in the form of a diaper or the like is worn by an infant, the flexible abdominal patch 100 is located substantially near the elastic waistline of the disposable sanitary article. Because the flexible abdomen patch 100 has fewer constituent substances, the elastic waistline can not bring obvious compression feeling to infants after compressing the flexible abdomen patch 100, and further, because the flexible abdomen patch 100 is internally provided with the flexible basal layer 21, the flexible basal layer 21 can further buffer the compression effect of the elastic waistline, and further lighten the compression effect brought by the elastic waistline.

A method of detecting a user's state using the flexible abdominal patch 100 is described below with reference to fig. 3. The method comprises the following steps:

in step 101, an electrical signal generated in response to a pressure change of the abdomen of the user is acquired by the pressure detection module 31 of the pressure sensing device 30, and noise reduction processing is performed on the electrical signal by the signal processing module 32 to generate a filtered signal.

In step 102, the signal processing module 32 compares the filtered signal with the previously stored reference signal. When there is a difference between the filtered signal and the reference signal, step 103 is entered to output an alert signal to the outside, alerting the caregiver to the status of the user of the flexible abdominal patch 100. When the filtered signal and the reference signal are identical (after the filtered signal has filtered the reference signal, the precondition at this time is "when no filtered signal is output"), step 104 is entered.

In step 104, the filtered signal is compared to a first waveform corresponding to normal bowel movement. If the filtering signal corresponds to the first waveform, step 105 is performed to remind the user to replace the diaper, clean the diaper, and step 106 is performed at the same time. If the filtered signal does not correspond to the first waveform, monitoring is continued.

In step 106, the first waveform corresponding to diarrhea continuously appears in the filtered signal, and when the number of occurrences of the first waveform reaches 5-11 times/day, the user is indicated to be in a diarrhea state, and step 107 is performed to remind the nursing staff to replace the diaper in time and confirm whether the user with the flexible abdomen patch 100 needs to seek medical advice.

In fig. 3, the user state is detected in the order of steps 104 to 106, and it is understood that steps 104 and 106 may be performed simultaneously.

Furthermore, based on the above description, steps 104, 106 may also be replaced with steps for determining whether the user is experiencing mild asthma, severe asthma, which are based on the same determination logic. In addition, based on the concepts of the present disclosure, the steps of determining whether a user has bowel movement, diarrhea, mild asthma, severe asthma conditions may be performed simultaneously, or partially in tandem, which may be freely combined.

As can be seen from the above, unlike the conventional manner of detecting defecation, the present disclosure detects a change in the abdominal pressure of the user using the pressure sensing device 30, and thus detects whether the user has defecation, asthma, or the like. Since the pressure sensing device 30 can synchronously detect the corresponding situation of the user when the user urinates and asthma occurs, the nursing staff can timely find the abnormal information of the user state.

Finally, it should be noted that: the foregoing description of the preferred embodiments of the present invention is not intended to be limiting, but rather, it will be apparent to those skilled in the art that the foregoing description of the preferred embodiments of the present invention can be modified or equivalents can be substituted for some of the features thereof, and any modification, equivalent substitution, improvement or the like that is within the spirit and principles of the present invention should be included in the scope of the present invention.

Reference numerals illustrate:

flexible abdominal patch: 100.

skin layer: 10.

coating layer: 20.

pressure sensing device: 30.

and a transmitting module: 40.

a flexible substrate layer: 21.

isolation layer: 22.

the pressure detection module: 31.

and a signal processing module: 32.

Claims

1. a flexible abdominal patch (100), the flexible abdominal patch (100) comprising:

a skin-engaging layer (10), the skin-engaging layer (10) being capable of being applied to the skin of the abdomen of a user;

-a coating layer (20), said coating layer (20) being arranged on the opposite side of said skin-contacting layer (10) away from the skin of the user;

a pressure sensing device (30) embedded within the coating layer (20), the pressure sensing device (30) being attached to the skin layer (10) and configured to sense changes in pressure of the abdomen of a user to send an alert signal indicative of an abnormality in the user's state, wherein

The pressure sensing device (30) comprises:

a pressure detection module (31), the pressure detection module (31) being attached to the skin layer (10) and being configured to be able to generate an electrical signal in response to a pressure change of the user's abdomen;

a signal processing module (32), the signal processing module (32) being communicatively connected to the pressure detection module (31) and configured to be able to receive and process the electrical signal, thereby determining whether an abnormality has occurred in the user state;

the signal processing module (32) is configured to be capable of:

wherein, when the difference exists, the pressure sensing device (30) outputs a warning signal to the outside,

when the waveform of the filtering signal is a first waveform, a signal representing the defecation of the user is sent to the outside, wherein the frequency of the first waveform is 15 times/min-18 times/min, the amplitude is 0.14-0.18V, the power is 0.28W-0.55W, or

And when the waveform of the filtered signal is a second waveform, sending a signal representing asthma of a user to the outside, wherein the second waveform has a first wave band, the frequency of the waveform corresponding to the adjacent wave trough of the first wave band is 40-75 times/min, the amplitude is 0.5-0.7V, and the power is 10W-36.8W.

2. The flexible abdominal patch (100) according to claim 1 wherein the cover layer (20) comprises:

-a flexible substrate layer (21), the flexible substrate layer (21) being arranged in close proximity to the skin-friendly layer (10), the pressure sensing means (30) being embedded in the flexible substrate layer (21); and

the isolation layer (22) is arranged on one side of the flexible substrate layer (21) far away from the skin-attaching layer (10) and used for isolating external influences.

3. The flexible abdominal patch (100) according to claim 1 wherein the skin-contacting layer (10) is a biocompatible gel layer.

4. The flexible abdominal patch (100) according to claim 2 wherein the isolation layer (22) is provided with a combination of release paper backing and release paper, or with velcro.

5. The flexible abdominal patch (100) according to any one of claims 1-4 further comprising a transmitting module (40) embedded within the cover (20), the transmitting module (40) being communicatively connected to the pressure sensing device (30) and an external terminal device, respectively, for transmitting the alert signal to the terminal device.

6. The flexible abdominal patch (100) according to any of claims 1-4 wherein the pressure detection module (31) is a piezoelectric sensor.

7. The flexible abdominal patch (100) according to any of claims 1-4, wherein the corresponding waveform of the reference signal has a frequency of 20-35 times/min, an amplitude of 0.2-0.45V, and a power of 0.85W-7.08W.

8. The flexible abdominal patch (100) according to any of claims 1-4 wherein wavelet analysis is employed for noise reduction treatment.

9. The flexible abdominal patch (100) according to any of claims 1-4, wherein a waveform corresponding to the reference signal is filtered in the noise reduction process.

10. The flexible abdominal patch (100) according to any of claims 1-4 wherein the filtered signal of the first waveform is transmitted to the outside when 5-11 times a day is acquired, the signal being indicative of diarrhea occurring in the user.

11. The flexible abdominal patch (100) according to any of claims 1-4 wherein when the second waveform is further in the presence of a second band, signaling to the outside that severe asthma has occurred in the user, the corresponding waveform of adjacent valleys of the second band has a frequency of 10-20 times/min, an amplitude of 0.1-0.15V, and a power of 0.1W-0.45W.