System and method for acoustically detecting moisture changes

Abstract

The present disclosure relates to a system (100) for acoustically detecting moisture changes, the system (100) comprising: at least one conversion element (10); an acoustic sensor (40) configured to be mechanically connected to the structure (50); and a processor (42, 62) coupled to the acoustic sensor (40), in which the at least one conversion element (10) comprises an actuation portion (20) having at least one material having moisture absorption properties such that a moisture change causes a movement of the actuation portion (20) that causes the conversion element (10) to generate a characteristic sound and conduct the characteristic sound into the structure (50), the acoustic sensor (40) is configured to record a characteristic sound generated by the at least one conversion element (10) as a structural sound propagating through the structure (50), and the processor (42, 62) is configured to detect a moisture change based on the characteristic sound recorded by the acoustic sensor (40).

Description

Technical Field

[0001] This disclosure relates to systems and methods for acoustically detecting changes in moisture. More specifically, this disclosure relates to systems and methods for acoustically detecting changes in moisture as defined in the preamble of the independent claims. Background Technology

[0002] It is well known that leaks, regardless of the application, can cause serious damage if not detected in time, and several different solutions exist for leak detection. However, a problem with many solutions is that they are configured to detect leaks only when a large amount of liquid has leaked and may have already caused some damage. It is also evident that most solutions focus on detecting sudden, large leaks that can cause the most severe damage, while small leaks (micro-leaks) typically take much longer to detect.

[0003] The complexity of different detectors on the market can vary, and the ways in which solutions draw attention to detected leaks also differ. As an example, patent US3874223 discloses a detector element that rotates itself or another element in response to contact with a liquid, thereby causing a signal generating device to indicate that liquid has been detected. Furthermore, patent GB2410561 B discloses a leak detector that changes color upon contact with a fluid. The visible color change draws attention to the leak, allowing it to be repaired. The detector may also include auditory and / or luminous devices for attracting attention.

[0004] While existing technologies have largely addressed some issues related to leak detection or moisture changes, they typically fail to provide a compact and space-saving solution that is simple to assemble and use, and capable of detecting leaks at an early stage, particularly micro-leaks. Therefore, there is a need for improved systems for detecting moisture changes. Summary of the Invention

[0005] The purpose of this disclosure is to mitigate, alleviate or eliminate one or more defects and deficiencies in the prior art and to solve at least one of the current problems.

[0006] The specific purpose of this disclosure is to provide a system for acoustically detecting changes in moisture that is simple, compact, and easy to assemble and use.

[0007] Another objective of this disclosure is to provide a system for acoustically detecting changes in moisture, configured to detect leaks, particularly micro-leaks, at an early stage.

[0008] According to a first aspect of this disclosure, a system for acoustically detecting changes in moisture is provided. The system includes: at least one conversion element for converting a change in moisture into a characteristic sound; an acoustic sensor configured to be mechanically connected to a structure at a distance from the at least one conversion element; and a processor coupled to the acoustic sensor, wherein the at least one conversion element includes an actuating portion having at least one material with hygroscopic properties, such that a change in moisture causes movement of the actuating portion, which causes the conversion element to generate and transmit the characteristic sound into the structure, wherein the acoustic sensor is configured to record the characteristic sound generated by the at least one conversion element as structured sound propagating through the structure, and the processor is configured to detect the change in moisture based on the characteristic sound recorded by the acoustic sensor. The at least one material of the actuating portion having hygroscopic properties means that the material is configured to change size and / or shape in response to a change in moisture, the change in size and / or shape constituting or causing movement of the actuating portion.

[0009] It should be understood that, in this document, moisture is defined as water or other liquids that diffuse in the form of vapor, diffuse within a solid, or condense on a surface. Therefore, moisture changes as used herein will include all cases ranging from changes in humidity to increases in moisture caused by liquid leakage. The actuating part may include at least one material with hygroscopic properties such that moisture changes cause changes in the size and / or shape of the actuating part, thereby causing movement of the actuating part. The actuating part may include at least one hygroscopic material configured such that moisture changes cause movement of the actuating part. The at least one hygroscopic material readily absorbs or adsorbs moisture and then expands or extends, thereby causing movement of the actuating part.

[0010] Moisture changes can occur for various reasons. For example, a moisture change could be due to a leak or an increase in humidity. Alternatively, a moisture change could be a decrease in humidity. With the system disclosed herein, moisture changes are converted into a characteristic sound that is conducted into a structure, whereby an acoustic sensor records the characteristic sound, and a processor detects the moisture change. The conversion element can be a mechanical construction. A conversion element is a simple mechanical construction comprising one or more materials or geometries that respond to moisture changes (increase or decrease) and thus cause a portion of the conversion element to move. The conversion element can be arranged in association with an object from which moisture changes need to be detected, or in an environment where moisture changes need to be detected. The conversion element includes an actuating portion of at least one material with hygroscopic properties, which responds to moisture changes by initiating movement of the actuating portion and thereby generating a characteristic sound that is conducted into the structure. Thus, the conversion element will physically interact with the structure at least temporarily, allowing the characteristic sound to propagate through the structure and be recorded by the acoustic sensor. The acoustic sensor and the conversion element are mechanically connected at least temporarily by means of the structure. Structure-borne sound can propagate over long distances, and electroacoustic sensors can be positioned away from conversion elements and moisture changes. For safety reasons, it is advantageous to avoid placing electrical components at locations of moisture changes, and this also allows the system to be used to detect moisture changes in environments without power – as long as the acoustic sensors are mechanically (directly or indirectly) connected to a structure in that environment. Furthermore, the system allows multiple conversion elements to be connected to the same structure, enabling the detection of moisture changes at different locations on / along the same structure using a single sensor and processor. By using acoustic sensors that record the characteristic sound of the conversion elements as structure-borne sound, ambient sounds and / or noise will not interfere with the recorded sound compared to using microphones to detect airborne sound. In this way, the characteristic sound generated by the conversion elements is easily recorded, and a reliable system for detecting moisture changes is achieved.

[0011] The shape and configuration of the conversion element determine the characteristic sound it produces. Thus, the processor can determine that the recorded sound originates from the conversion element and, consequently, that a moisture change has occurred at the location of that element.

[0012] The actuating portion of the conversion element can be configured to respond to moisture changes above or below a specific moisture threshold. Therefore, when the moisture level has become above or below the specific moisture threshold, movement of the actuating portion can occur. This movement of the actuating portion will produce a characteristic sound.

[0013] The conversion element may include a sound-generating portion connected to an actuating portion. Movement of the actuating portion may affect and move at least a portion of the sound-generating portion, and when the actuating portion actuates the sound-generating portion, the sound-generating portion may thus generate a characteristic sound. The sound-generating portion may be configured to conduct the characteristic sound into the structure. The sound-generating portion may include at least one contact portion configured to physically contact the structure. Thus, the characteristic sound generated by the conversion element will be conducted into the structure via the contact portion.

[0014] According to an example of this disclosure, a sound generating portion includes at least one vibrating element configured to vibrate by movement of an actuating portion. This configuration of the at least one vibrating element causes the characteristic sound to include at least one characteristic frequency and / or a plurality of frequencies constituting a sequence of characteristic frequencies. The vibrating element may be mechanically connected directly or indirectly to the actuating portion. The vibrating element may be indirectly connected to the actuating portion via a mechanical bridge, such that movement of the actuating portion causes movement of the mechanical bridge, thereby causing the vibrating element to vibrate. Alternatively, the vibrating element may be arranged adjacent to the actuating portion, such that movement of the actuating portion causes physical interaction or collision between the actuating portion and the vibrating element, thereby causing the vibrating element to vibrate. Alternatively, the actuating portion and the vibrating element are integrated into a single unit, such that movement of the actuating portion drives the vibrating element and causes it to vibrate.

[0015] The movement of the actuating element itself can generate a characteristic sound indicating a change in humidity. However, the vibration generated by the movement of the vibrating element will add at least one characteristic frequency to the characteristic sound, and the conversion element will thus have a unique identifier. The movement of the actuating element can cause a short-duration sound pulse, and the vibrating element can cause reverberation, thereby giving the characteristic sound its identifier. The vibrating element can be referred to as a reverberating element. In some embodiments, the system can be configured such that the detection of a sound pulse caused by the actuating element by an acoustic sensor triggers a processor to perform frequency analysis on the aftersound following the sound pulse. In this way, computationally demanding frequency analysis can be performed only in response to the movement of the actuating element of the conversion element, thereby ensuring energy-efficient monitoring of humidity.

[0016] At least one vibrating element may include an elongated leg or tongue having a free end, and connected at the other end to an actuating portion or a sound-generating portion. The sound-generating portion of the conversion element may include multiple vibrating elements.

[0017] At least one vibrating element may include a vibrating portion extending between a pivot point and a free end of the vibrating element. The conversion element may include means for manually adjusting the length of the vibrating portion to manually influence at least one characteristic frequency and / or multiple frequencies constituting a sequence of characteristic frequencies. Thus, by manually adjusting the length of the vibrating portion, a specific and unique identifier can be assigned to the conversion element. In this way, the conversion elements can be manufactured using a common configuration, and users can personalize each conversion element to produce different characteristic sounds. This means that a user with multiple conversion elements can adjust the length of the vibrating portion of each vibrating element of each conversion element, thereby creating a unique identifier for the conversion element. The means for adjusting the length of the vibrating portion of at least one vibrating element may include markings, serrations, zigzags, or perforations for bending or removing a portion of the vibrating portion, thereby adjusting the length of the vibrating portion.

[0018] Alternatively, the means for adjusting the length of the vibrating portion of at least one vibrating element may include a slider element capable of moving along the length of the vibrating element. The slider element connects the vibrating element to a fixed support structure and thus constitutes a pivot point of the vibrating portion. Therefore, the position of the slider element determines the position of the pivot point of the vibrating element. By moving the slider element, the pivot point is moved, and the length of the vibrating portion is adjusted.

[0019] The conversion element may include an attachment portion for attaching the conversion element to a structure or an object mechanically connected to the structure. The attachment portion may be configured as a clip, a snap-fit ​​mechanism, or a clamping mechanism. Alternatively, the attachment portion may include an adhesive for adhering the conversion element to the structure. The attachment portion may also constitute a contact portion of the sound-generating part.

[0020] A conversion element can be a single unit in which all components and parts are integrally connected to each other. This facilitates the manufacture, installation, and use of the conversion element.

[0021] The actuating component may include at least two materials with different hygroscopic properties. The at least two materials with different hygroscopic properties in the actuating component typically involve: a first component using a first material that readily absorbs or adsorbs moisture, and a second component using a second material that is less prone to absorbing or adsorbing moisture. When the first component adsorbs or absorbs moisture, it will expand or extend. The conversion element is appropriately configured such that the expansion of the first component will cause movement of the second component. The expansion of the first component can cause it to exert a force on the second component, thereby causing movement of the second component. Similarly, a reduction in moisture may cause the first component to contract or shrink, which may also cause movement of the second component.

[0022] The structure can be part of a piping system, pipes or hoses, a table, wall, floor, container, shelf, or any physical structure configured to allow sound to propagate through it. In one example, the structure is a piping system or the like, and at least one conversion element may be positioned near a pipe joint—where the risk of leakage increases. In another example, the structure is the floor beneath a water-consuming appliance such as a washing machine or dishwasher, and the system is arranged to detect leaks from such appliances. In yet another example, the system is arranged to detect a decrease in moisture. For example, the conversion element may be positioned on the inner wall of a container filled with liquid, where it produces a characteristic sound when the liquid level in the container is below the location of the conversion element. In this case, the sensor can be positioned anywhere on the container wall, preferably externally.

[0023] According to an example of this disclosure, the actuation section includes a snapping mechanism configured to perform a snapping movement in response to a change in humidity to enter a steady state. The snapping movement is a sudden movement caused by a rapid release of energy, either pre-stored as potential energy in the snapping mechanism or stored in response to a change in humidity. The snapping movement can generate a characteristic sound, and the sound-generating section will transmit this characteristic sound into the structure. When the actuation section includes a snapping mechanism—configured to perform a snapping movement in response to a change in humidity to enter a steady state—at least one vibrating element can be configured to vibrate via the snapping movement of the snapping mechanism. The sudden movement of the snapping mechanism will cause the vibrating element to vibrate, and cause the characteristic sound to include at least one characteristic frequency and / or multiple frequencies constituting a sequence of characteristic frequencies.

[0024] The snap-through mechanism can be a bistable mechanism configured to have snap-through instability, adapted to perform a snap-through movement between a first and second stable state in response to changes in humidity. Such a mechanism typically transitions rapidly between the two stable states, and this rapid movement from one stable state to the other results in the generation of a characteristic sound. In embodiments employing at least one vibrating element, the rapid movement between the two stable states can cause the at least one vibrating element to vibrate, thereby enabling the characteristic sound to include at least one characteristic frequency and / or multiple frequencies constituting a sequence of characteristic frequencies.

[0025] According to an example of this disclosure, the snap-action mechanism of the actuating part includes a dome-shaped component configured to snap-action in response to changes in moisture. The snap-action mechanism, configured in this way to have snap-action instability, is configured to perform a snap-action movement between a first stable state and a second stable state of a bistable mechanism in response to changes in moisture, thereby causing the dome-shaped component to flip. When the snap-action movement occurs, the characteristic sound generated by the sound-generating part as the actuating part moves is conducted into the structure via the sound-generating part mechanically connected to the structure. The actuating part may include a first component having an absorbing or adsorbing material, which expands or contracts in response to changes in moisture. The dome-shaped component of the snap-action mechanism may constitute a second component of the actuating part as mentioned above. The first component is typically arranged below the dome-shaped second component such that the expansion of the first component causes the first component to press against the second component, ultimately causing it to flip. Therefore, the first component can actuate the snap-action movement of the snap-action mechanism. The sound-generating part can be mechanically attached to the structure by attaching the contact portion of the sound-generating part to the structure using an adhesive. The contact portion can be substantially flat. Alternatively, the contact portion of the sound-generating portion can be configured to be clamped around the structure. Thus, the contact portion can at least partially surround a part of the structure. The sound-generating portion of the conversion element may also include at least one vibrating element.

[0026] The snap-action mechanism of the actuating part may alternatively include at least one slightly elastic component and at least one engaging element, both arranged to move relative to each other in response to a change in moisture, such that the elastic component eventually disengages from and springs back from the at least one engaging element, thereby causing the snap-action movement. Thus, the snap-action mechanism can be configured such that, in the normal state of the switching element, at least one elastic component and at least one engaging element are engaged. When a change in moisture is present, at least one elastic component will accumulate energy as it bends and / or flexes against the at least one engaging element. As at least one elastic component and at least one engaging element continue to move relative to each other, the elastic component will eventually release energy rapidly and spring back to the other side of the at least one engaging element. Thus, at least one elastic component can have a stable state on each side of the at least one engaging element. In this way, the snap-action mechanism can be considered to function as a ratchet mechanism or a similar device. At least one elastic component and at least one engaging element can be arranged to move toward each other in opposite directions. At least one elastic component can be an integral part of the actuating part. At least one engaging element can be a groove, recess, or protrusion. At least one elastic component can be an elastic protrusion, spike, needle, tooth, tip, or the like. The snap-action mechanism may include multiple engaging elements, such as multiple grooves, recesses, protrusions, or wavy patterns. In cases where the snap-action mechanism includes two elastic members, these members can be arranged such that the sequence in which they engage / disengage with at least one engaging element will affect the resulting characteristic sound, allowing the processor to determine the direction of movement of the elastic members based on the characteristic sound. This can be used to determine, for example, whether a change in humidity is increasing or decreasing.

[0027] The switching element, in its non-installed state, can be elongated and substantially flat. The actuating portion can be elongated, with a length similar to or longer than the perimeter of the structure, allowing it to wrap around the structure. This can be advantageous when the structure is a pipe, tube, hose, or the like. The actuating portion can be flexible, allowing it to be wound around the structure. In this case, the actuating portion can form an attachment portion. In one example, the switching element, in its non-installed state, is substantially L-shaped, wherein the actuating portion and the sound-generating portion are arranged perpendicularly to each other in the same plane. The longest portion of the switching element can be the actuating portion, and the other portions can be the sound-generating portion. Alternatively, the switching element is elongated and straight, wherein at least a portion of the sound-generating portion is an extension of the actuating portion, and vice versa. Thus, at least a portion of the sound-generating portion can be arranged at one end of the switching element, while the actuating portion is arranged at the other end. Specifically, at least one vibrating element of the sound-generating portion can be arranged at one end of the switching element, while the actuating portion is arranged at the other end. The sound-generating part and / or the vibrating element of the sound-generating part can be configured to extend parallel to or perpendicular to the longitudinal extension direction of the structure in which it is located.

[0028] According to one example of this disclosure, the actuating portion is configured to surround a structure such that an overlapping section exists, in which a first end and a second end of the actuating portion overlap each other, wherein an elastic member and at least one engaging element are arranged in the overlapping section on opposite sides of the first and second ends of the actuating portion. In this way, the elastic member and at least one engaging element will interact within the overlapping section. In the overlapping section, the first end may be arranged closest to the structure and may be referred to as the lower portion of the actuating portion, while the second end may be referred to as the upper portion of the actuating portion. In one example, the elastic member protrudes downward from the upper portion of the actuating portion, and the engaging element is arranged on the lower portion of the actuating portion, facing the upper portion of the actuating portion in the overlapping section. In another example, in the overlapping section, the elastic member protrudes upward from the lower portion of the actuating portion, and the engaging element is arranged on the upper portion of the actuating portion. For the elastic member and the engaging element to interact with each other in the overlapping section, they should be arranged on opposite sides of the actuating portion.

[0029] An actuating portion having at least one material with hygroscopic properties can move in response to changes in moisture, causing a change in the diameter of the surrounding actuating portion and movement of the elastic member and at least one engaging element relative to each other. An actuating portion having a snap-action mechanism may include at least one hygroscopic material. In one example, the actuating portion includes a first absorbent member or layer disposed closest to the structure, and a second member including a snap-action mechanism and disposed to surround the structure and form an overlapping section. The first member is configured to expand or contract in response to changes in moisture, thereby changing the diameter of the second member surrounding the actuating portion and movement of the elastic member and at least one engaging element relative to each other. By arranging the absorbent first member closest to the structure, an increase in moisture associated with the structure will rapidly cause the first member to expand. When the first member expands, it pushes the second member surrounding the actuating portion outward away from the structure, and the diameter of the second member of the actuating portion will increase. In this way, the upper and lower portions of the actuating portion in the overlapping section will begin to move relative to each other. As the first component continues to absorb moisture and expand, the elastic component eventually detaches from at least one engaging element and springs back to a stable state on the other side of the engaging element, causing a sudden movement. Similarly, by arranging the absorbent first component closest to the structure, the reduction of moisture associated with the structure will rapidly cause the first component to contract. As it contracts, the diameter of the second component surrounding the actuating portion of the structure will decrease, and the upper and lower portions of the actuating portion in the overlapping section will begin to move relative to each other. In this way, the elastic component eventually detaches from at least one engaging element and springs back to a stable state on the other side of the engaging element, causing a sudden movement. The sudden movement will cause the sound-generating portion to produce a characteristic sound. The sound-generating portion includes at least one contact portion configured to be in temporary or continuous physical contact with the structure. In this example, the sound-generating portion may include at least one contact portion extending toward the structure perpendicular to the longitudinal extension direction of the actuating portion and / or the sound-generating portion. When a sudden movement occurs, the contact portion will conduct the characteristic sound into the structure, thereby indicating a change in moisture. The sudden movement will also cause at least one vibrating element to vibrate, which will result in the characteristic sound including at least one characteristic frequency. In this way, the acoustic sensor will record the characteristic sound, and the processor will detect the change in humidity.

[0030] The switching element may include metal, and the resilient member may be a spike, tongue, or tooth formed by stamping in the metal, extending substantially perpendicular to the main extending plane of the switching element. The actuating portion may include a plurality of engaging elements configured as recessed patterns formed in the metal. Such recesses are arranged to extend perpendicular to the longitudinal extending direction of the actuating portion.

[0031] The switching element can be configured such that the actuating part moves when the moisture level changes relative to normal and when the moisture level returns to normal. In this way, the same switching element can be used multiple times. As an example, the switching element can be configured to react to an increase in moisture, indicating a risk of leakage. The actuating part can move abruptly, causing a sensor to record a characteristic sound and the processor to detect the moisture change. The operator can then take some action to avoid the problem, such as stopping a leak. When the moisture level near the switching element decreases to normal, the switching element can react again and produce a characteristic sound, which is recorded by the sensor. The direction of movement of the actuating part when the moisture level returns to normal can be opposite to the direction of movement caused by the increase in moisture. The processor can then detect, based on the recorded characteristic sound, that the switching element has returned to its original state, and therefore the problem of excessive moisture no longer exists. This also applies when the switching element is configured to react to a decrease in moisture relative to normal and to a subsequent increase in moisture returning to normal.

[0032] Therefore, the conversion element can be configured such that the characteristics of the sound generated by the conversion element depend on the direction of movement of the actuating part. In some embodiments, to enable the conversion element to generate different sounds for different directions of movement of the actuating part, the conversion element can be configured to sequentially generate at least two different sounds when the actuating part is moved, wherein the order of these two different sounds helps to determine whether the movement of the actuating part is caused by an increase or decrease in moisture. For example, the conversion element can be configured such that the movement of the actuating part causes both a first vibrating element having a first characteristic frequency and a second vibrating element having a second characteristic frequency to vibrate, wherein the order in which the first and second vibrating elements begin to vibrate depends on the direction of movement of the actuating part. In this way, the processor can determine the direction of movement of the actuating part based on the order of frequencies recorded by the acoustic sensor.

[0033] As previously described, the system may include multiple conversion elements, wherein a characteristic sound created by each conversion element is associated with a unique identifier and / or location of the conversion element, and the processor is configured to determine the location of a moisture change based on the unique identifier and / or location of the conversion element that created the recorded characteristic sound. As an example, the system may include multiple conversion elements arranged at different locations within a piping system. Since they are all arranged on the same piping system, a single sensor attached to the same piping system can record any sound generated by any of these conversion elements. Depending on the location of the conversion element, the characteristic sound propagating through the structure from the conversion element will vary. Additionally or alternatively, each conversion element may have a sound-generating portion configured differently from the other conversion elements, such as employing a different configuration of vibrating elements, such that each conversion element is associated with a unique identifier. Therefore, in the event of a leak somewhere along the piping system, the corresponding conversion element will generate a characteristic sound, and the processor will not only be able to detect the moisture change but also determine the location of the conversion element based on its unique identifier, and thus determine the location of the leak.

[0034] According to another aspect of this disclosure, a method for acoustically detecting moisture changes is provided. The method includes: providing at least one conversion element for converting moisture changes into characteristic sounds, wherein the conversion element includes an actuating portion having at least one material with hygroscopic properties, such that the moisture change causes movement of the actuating portion, which causes the conversion element to generate the characteristic sound and transmit the characteristic sound into a structure; recording the characteristic sound generated by the conversion element as structured sound propagating through the structure via an acoustic sensor mechanically connected to the structure at a distance from the at least one conversion element; and detecting the moisture change based on the characteristic sound recorded by the acoustic sensor via a processor coupled to the acoustic sensor. The processor can receive a signal corresponding to the recorded characteristic sound from the acoustic sensor, and the processor can detect the moisture change based on the received signal.

[0035] It should be understood that all the features and advantages of the system disclosed herein also apply to methods for acoustic detection of moisture changes using this system.

[0036] The conversion element may include a sound generating portion having at least one vibrating element configured to generate vibration by movement of an actuating portion, such configuration of the at least one vibrating element such that the characteristic sound includes at least one characteristic frequency and / or a plurality of frequencies constituting a sequence of characteristic frequencies, wherein moisture changes are detected based on at least one characteristic frequency and / or the plurality of frequencies constituting the sequence of characteristic frequencies.

[0037] The vibrating element may include a vibrating portion extending between the pivot point and the free end of the vibrating element. The method may also include adjusting the length of the vibrating portion to manually influence at least one characteristic frequency and / or multiple frequencies constituting a sequence of characteristic frequencies. In this way, the system user can manually assign a unique identifier to each conversion element to facilitate the use of multiple conversion elements in the same structure.

[0038] The steps for detecting moisture changes may include: determining the location of the moisture change based on the unique identifier and / or location of the conversion element that created the recorded characteristic sound.

[0039] It should be understood that all system-related features and advantages also apply to the method.

[0040] According to another aspect of this disclosure, a computer program is provided that includes computer-readable instructions, when executed by a processor of the system disclosed herein for acoustically detecting changes in humidity, causing the processor to perform steps for detecting changes in humidity based on characteristic sounds generated by a conversion element of the system and recorded by an acoustic sensor. The computer program may also include instructions for causing the system's processor to perform any method steps of the above-described methods, or any combination thereof, associated with the processor.

[0041] A computer program, or a portion thereof, may reside in the data storage medium of the acoustic sensor. In some embodiments, the computer program may be a distributed application comprising several computer program components configured to perform different steps of the methods described above. For example, the computer program may include a first program component or application residing in the acoustic sensor, a second program component or application residing in a web server, and a third program component or application residing in a client device in the form of a client application for data presentation and user interaction. In another example, the computer program may include a web application accessible via a web browser on the client device.

[0042] According to another aspect of this disclosure, a computer program product is provided, which includes at least one computer-readable medium, such as a non-transitory memory hardware device, storing the computer program described above.

[0043] This disclosure will become apparent from the detailed description given below. The detailed description and specific examples disclose preferred embodiments of this disclosure by way of illustration only. Those skilled in the art will understand, based on the guidance in the detailed description, that changes and modifications can be made within the scope of the appended claims. Attached Figure Description

[0044] The above-mentioned objects, additional objects, features, and advantages of this disclosure will be more fully understood by taking into account the accompanying drawings and the following illustrative and non-limiting detailed description of exemplary embodiments thereof, in which:

[0045] Figure 1 An exemplary embodiment of a system for acoustically detecting changes in humidity, according to the present disclosure, is shown;

[0046] Figures 2a to 2b An example of a conversion element according to this disclosure is shown;

[0047] Figures 3a to 3b An example of a conversion element according to this disclosure is shown;

[0048] Figures 4a to 4c An example of a conversion element according to this disclosure is shown;

[0049] Figure 5 An example of a conversion element according to this disclosure is shown;

[0050] Figures 6a to 6b An example of a conversion element according to this disclosure is shown;

[0051] Figures 7a to 7c Details of a conversion element according to an example of this disclosure are shown;

[0052] Figure 8 An example of a system for acoustically detecting changes in moisture is shown according to this disclosure;

[0053] Figure 9 An example of a system for acoustically detecting changes in moisture is shown according to this disclosure;

[0054] Figure 10 An exemplary embodiment of a method for acoustically detecting changes in moisture according to the present disclosure is shown. Detailed Implementation

[0055] This disclosure will now be described with reference to the accompanying drawings, in which preferred exemplary embodiments of the disclosure are illustrated. However, this disclosure may be implemented in other forms and should not be construed as limited to the embodiments disclosed herein. The disclosed embodiments are provided merely to fully convey the scope of this disclosure to those skilled in the art.

[0056] It should be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. It should be noted that, as used in the specification and appended claims, the articles “a,” “an,” “the,” and “the” are intended to indicate the presence of one or more elements unless the context explicitly specifies otherwise. Thus, for example, a reference to “unit” or “the unit” can include several devices, etc. Furthermore, the terms “comprising,” “including,” “containing,” and similar wording are intended as open-ended transitional terms that do not exclude the possibility of additional elements or steps.

[0057] Figure 1 A system 100 for acoustically detecting changes in moisture is schematically illustrated according to an example of the present disclosure. System 100 includes at least one conversion element 10 for converting changes in moisture into characteristic sounds. System 100 also includes an acoustic sensor 40 mechanically connected to a structure 50 at a distance from the at least one conversion element 10. Furthermore, system 100 includes at least one processor 42, 62 coupled to the acoustic sensor 40. The conversion element 10 includes an actuating portion (not shown) having at least one material with hygroscopic properties, such that changes in moisture cause movement of the actuating portion. Thus, the actuating portion includes at least one material that responds to changes in moisture by causing movement of the actuating portion. Movement of the actuating portion causes the conversion element 10 to generate a characteristic sound and transmit the characteristic sound into the structure 50. The acoustic sensor 40 is configured to record the characteristic sound generated by the conversion element 10 as structured sound propagating through the structure 50, and at least one processor 42, 62 is configured to detect changes in moisture based on the characteristic sound recorded by the acoustic sensor 40.

[0058] In response to the detection of a change in humidity, system 100 can be configured to notify the user of the humidity change, for example, by generating a local alarm or by informing the user via a mobile electronic device 70 (to which the acoustic sensor 40 can communicatively connect). Therefore, when at least one processor 42, 62 detects a change in humidity, the change can be displayed on the user's mobile electronic device, informing the user of the situation and enabling them to take action if necessary to address the detected change in humidity.

[0059] The acoustic sensor 40 includes a housing 45, such as a plastic housing, which is securely attached to the structure 50 to ensure a tight mechanical connection between the sensor housing 45 and the structure 50. The acoustic sensor 40 also includes an acoustic sensor element 41 configured to record acoustic signals in the form of structured sound or vibration propagating through the structure 50. The acoustic sensor element 41 may be, for example, a piezoelectric acoustic sensor element or a contact microphone for recording structured sound in the structure 50. The acoustic sensor 40 also includes a processor 42 and a data storage medium 43. The data storage medium 43 stores computer program components that, individually or collaboratively with computer program components residing in one or more other devices capable of being connected to the acoustic sensor 40, constitute a computer program for detecting changes in moisture.

[0060] In the illustrated example, system 100 is a cloud-based system including a web server 60. The acoustic sensor 40 includes a communication module 44 configured to communicate with the communication module 64 of the web server 60 using any known communication protocol. In some embodiments, the web server 60 is a web server connected to the Internet. The web server 60 also includes a processor 62 and a data storage medium 63 storing the server-side components of the aforementioned computer program. The logic required to process the recorded acoustic signals and determine whether a moisture change has occurred based on the processed acoustic signals may reside in either the acoustic sensor 40 or the web server 60. The web server 60 is configured to transmit information related to the detection of moisture changes to a client device 70, such as a fixed computer, laptop, tablet, or mobile phone. In some embodiments, the client device 70 may store a client application that communicates with the server-side components of the computer program. In this way, alarms and / or other information related to the detection of moisture changes can be transmitted from the web server 60 to the client device 70 in the form of push notifications.

[0061] The conversion element 10 is configured to respond to changes in moisture and thereby generate sound, which is transmitted into the structure 50. The conversion element 10 is suitably a simple mechanical construction, comprising materials and / or geometry that will respond to changes in moisture. The conversion element 10 suitably does not include any electronic or intelligent components. The shape and configuration of the conversion element 10 determine the characteristic sound produced by the conversion element 10. In this way, at least one processor 42, 62 of the system 100 will be able to determine that the recorded sound originates from the conversion element 10, and therefore determine that a change in moisture has occurred.

[0062] Figures 2a to 2b A conversion element 10 according to an example of this disclosure is schematically shown. The conversion element 10 can be configured according to... Figure 1This is part of a system 100 for acoustically detecting changes in moisture. In these examples, the conversion element 10 also includes a sound generating portion 30 connected to the actuation portion 20. The sound generating portion 30 includes at least one contact portion 38 configured to be arranged in a manner that physically contacts the structure 50. The sound generating portion 30 is configured to generate a characteristic sound and transmit the characteristic sound to the structure 50 when the actuation portion 20 moves.

[0063] exist Figure 2a and Figure 2b In the actuation section 20, a jump mechanism 22 is configured to perform a jump movement in response to a change in humidity to enter a stable state. This jump movement propagates through the conversion element 10, causing the sound generating section 30 to generate a characteristic sound and transmit it to the structure 50. The jump mechanism 22 may be a bistable mechanism configured to have a jump-instability characteristic, and is configured to perform a jump movement between a first stable state and a second stable state of the bistable mechanism in response to a change in humidity. The actuation section 20 may include a first component (see...) Figures 3a to 3b The first component has a higher hygroscopicity (ability to absorb moisture) than the second component including the jump mechanism 22. The first component is arranged to respond to changes in moisture and, in response, actuates the jump mechanism 22 and thereby causes a jump movement.

[0064] Figure 2a An example of the conversion element 10 is shown, wherein the sound generating portion 30 extends on both sides of the actuating portion 20 and includes two flat contact portions 38. The contact portions 38 are configured to be arranged in a manner that allows them to physically contact the structure 50, and in this manner transmit the characteristic sound into the structure 50. Figure 2a The left-hand conversion element 10 also shows a sound generating section 30 including a vibrating element 32. The vibrating element 32 is configured to generate vibration by movement of a snap-action mechanism 22. This configuration of the vibrating element 32 causes the characteristic sound to include at least one characteristic frequency. The snap-action mechanism 22 of the actuation section 20 typically transitions rapidly between two stable states, and this rapid movement from one stable state to another causes the vibrating element 32 to vibrate, and causes the contact portion 38 of the sound generating section 30 to transmit the generated characteristic sound into the structure 50.

[0065] Figure 2bThe conversion element 10 includes a sound generating portion 30 having a contact portion 38 that is folded to form a loop. Therefore, in these examples, the contact portion 38 of the sound generating portion 30 is configured to at least partially surround the structure 50, thereby clamping the conversion element 10 onto the structure 50. In the left figure, the sound generating portion 30 of the conversion element 10 also includes three vibrating elements 32. These three vibrating elements 32 have different lengths and will cause the characteristic sound to include at least three characteristic frequencies in such a way.

[0066] Figures 3a to 3b A conversion element 10 according to an example of this disclosure is schematically shown. The conversion element 10 can be configured according to... Figure 1 This is part of a system 100 for acoustic detection of moisture changes. Regarding the actuation section 20, the conversion element 10 can be as follows: Figures 2a to 2b That's the configuration you'd expect.

[0067] Figures 3a to 3b The diagram illustrates how the actuation portion 20 of the conversion element 10 reacts in the presence of moisture changes. The actuation portion 20 includes a first component 21' made of a first material that readily absorbs or adsorbs moisture, and a second component 21'' that is substantially dome-shaped. The dome-shaped second component 21'' constitutes the snap-action mechanism 22 of the conversion element 10. Figure 3a In its normal state, the second component 21'' is substantially concave, and the contact portion 38 of the sound-generating portion 30 is mechanically connected to the structure 50. When the moisture content increases, the first component 21' will absorb or adsorb moisture, thereby expanding and increasing in size. The expanding first component 21' will exert a force on the dome-shaped second component 21'', eventually causing the second component 21'' to buckle and flip its shape. Therefore, the second component 21'' will become convex, as shown... Figure 3b As shown. Therefore, the first component 21' of the actuating part 20 will cause the actuating mechanism 22 to move abruptly. This movement of the actuating mechanism 22 causes the sound generating part 30 to generate a characteristic sound, and causes the contact part 38 of the sound generating part 30 to transmit the characteristic sound into the structure 50.

[0068] Figures 4a to 4c An example of a conversion element 10 according to this disclosure is shown. The conversion element 10 can be configured as follows: Figure 1 This is part of the disclosed system 100 for acoustic detection of moisture changes. Figure 4a Three conversion elements 10 are shown arranged on the piping system constituting structure 50. The conversion elements 10 can be arranged around pipe joints, where the risk of leakage is increased. Figure 4b As shown Figure 4aThe disclosed conversion element 10 in a flat, non-mounted state. Figure 4c A cross-sectional view of another similar example of the conversion element 10 is shown.

[0069] like Figure 4b As shown, the conversion element 10 can be substantially L-shaped in its non-installed state. Therefore, the actuating portion 20 and the sound generating portion 30 are arranged perpendicularly to each other in the same plane. The sound generating portion 30 includes two vibrating elements 32. The vibrating elements 32 can be configured to extend parallel to the longitudinal extension direction of the structure 50. The sound generating portion 30 also includes at least one contact portion 38 configured to physically contact the structure 50. Figure 4a The contact portion 38 extends in a direction perpendicular to the longitudinal extension of the vibrating element 32. Figure 4b The two contact portions 38 are shown in a flat, unmounted state. When the conversion element 10 is mounted on the structure 50, the contact portions 38 can be bent 90 degrees to face and contact the structure 50.

[0070] Figures 4a to 4c Each of the conversion elements 10 shown has an actuation portion 20, which includes a snap-action mechanism 22. The actuation portions 20 are configured to surround the structure 50 such that there are overlapping sections 28 of the actuation portions 20. The overlapping sections 28 are in Figure 4c As shown, it includes a jump mechanism 22. In the overlapping section 28, the first end 20' of the actuating portion 20 overlaps with the second end 20'' of the actuating portion 20.

[0071] The snap-action mechanism 22 includes an elastic member 24 and a plurality of engaging elements 26, the engaging elements 26 and the elastic member 24 being arranged to move relative to each other in response to changes in moisture, such that the elastic member 24 eventually disengages from the engaging elements 26 and springs back, thereby causing a snap-action movement. Figure 4a and Figure 4b In this configuration, the conversion element 10 or at least the actuating portion 20 is made of a moisture-absorbing material, causing it to respond to changes in moisture, thereby altering the diameter of the surrounding actuating portion 20, and allowing the elastic member 24 and the engaging element 26 to move relative to each other. Figure 4cIn this actuation section 20, a first component 21' with a moisture-absorbing material that readily absorbs moisture and a second component 21'' including a snap-action mechanism 22 are included. The first component 21' is arranged closest to the structure 50 and also surrounds the structure 50. The first component 21' will respond to changes in moisture by changing its size, thereby causing movement of the second component 21'' of the actuation section 20, such that the diameter of the surrounding second component 21'' changes, and the elastic component 24 and the engaging element 26 move relative to each other. Thus, when a change in moisture is present, the elastic component 24 will accumulate energy as it bends against the engaging element 26. As the elastic component 24 and the engaging element 26 continue to move relative to each other, the elastic component 24 will eventually release the energy rapidly and spring back on the other side of the engaging element 26. The elastic component 24 can thus have a stable state on each side of the engaging element 26. Therefore, the first component 21' of the actuation section 20 will cause a snap-action movement of the snap-action mechanism 22. The movement of the snap mechanism 22 will cause the vibrating element 32 to vibrate, and the sound generating part 30 will generate a characteristic sound and transmit the characteristic sound to the structure 50 via the contact part 38.

[0072] The engaging element 26 is a groove, recess, or protrusion. The elastic member 24 is a protrusion, spike, needle, tooth, or similar structure. The elastic member 24 and the engaging element 26 are arranged in the overlapping section 28, on opposite sides of the first end 20' and the second end 20'' of the actuating portion 20. Figure 4a and Figure 4b In this configuration, the elastic member 24 is arranged at the second end 20'' of the actuating portion 20, protruding downward toward the first end 20' of the actuating portion 20. Therefore, the engaging element 26 is arranged at the first end 20' of the actuating portion 20. Figure 4c In this configuration, the elastic member 24 is arranged at the first end 20' of the actuating portion 20 and protrudes upward toward the second end 20'' of the actuating portion 20. Therefore, the engaging element 26 is arranged at the second end 20'' of the actuating portion 20.

[0073] Figure 5 An example of a conversion element 10 according to this disclosure is shown. The conversion element 10 can be configured as follows: Figure 1 This is a portion of the disclosed system 100 for acoustic detection of moisture changes. The figure shows a conversion element 10 arranged in a pipe or conduit constituting the structure 50. In this example, the conversion element 10 is... Figures 4a to 4c The conversion element 10 shown is similarly configured, but the contact portion 38 of the sound generating portion 30 is different. The actuation portion 20 may optionally include a first component 21' having a moisture-absorbing material, which is different from the component of the actuation portion 20 that includes the snap mechanism 22.

[0074] The conversion element 10 includes a sound generating portion 30 that extends perpendicularly to the actuating portion in the same plane. The sound generating portion 30 is elongated and includes an integral vibrating element 32. The vibrating element 32 is a cutout in the sound generating portion 30. At the free end of the sound generating portion 30, the sound generating portion 30 includes a downwardly bent structure configured to adjoin the structure 50. Therefore, this downwardly bent structure constitutes a contact portion 38. When the actuating portion 20 responds to a change in moisture, it causes a sudden movement of the snap mechanism 22. The movement of the snap mechanism 22 causes the vibrating element 32 to vibrate, resulting in the generation of a characteristic sound. This characteristic sound is then transmitted to the structure 50 through the contact portion 38 of the sound generating portion 30.

[0075] Figures 6a to 6b An example of a conversion element 10 according to this disclosure is shown. The conversion element 10 can be configured as follows: Figure 1 This is part of the disclosed system 100 for acoustic detection of moisture changes. Figure 6b The diagram shows a conversion element 10 arranged on a pipe or conduit constituting the structure 50.

[0076] In this example, such as Figure 6a As shown, the conversion element 10 is elongated and substantially flat in its non-installed state. The conversion element 10 includes an actuating portion 20 and a sound-generating portion 30, the sound-generating portion including two vibrating elements 32. The vibrating elements 32 are extensions of the actuating portion 20. Therefore, the actuating portion 20 and the vibrating elements 32 are arranged sequentially to each other along the longitudinal extension direction of the conversion element 10. The conversion element 10 includes a first end 10' and a second end 10''. The two vibrating elements 32 are configured as two parallel leg-like members at the second end 10'' of the conversion element 10. The first end 10' of the conversion element 10 is tapered. The sound-generating portion 30 also includes two contact portions 38 configured to physically contact the structure 50. Figure 6a A contact portion 38 is shown extending from the actuating portion 20 in a longitudinal direction perpendicular to the conversion element 10. When the conversion element 10 is mounted on the structure 50, the contact portion 38 can be bent 90 degrees to face and contact the structure 50.

[0077] The actuating portion 20 includes a snap-action mechanism 22. The actuating portion 20 includes a first component 21' having a material that readily adsorbs or absorbs moisture, and a second component 21'' including the snap-action mechanism 22. The actuating portion 20 is configured to surround the structure 50 such that there is an overlapping section 28 of the second component 21'' of the actuating portion 20. The first component 21' is arranged closest to the structure 50 and also surrounds the structure 50. The overlapping section 28... Figure 6bThe diagram shows and includes a snap-action mechanism 22. In the overlapping section 28, the first end 20' of the second component 21'' of the actuating portion 20 overlaps with the second end 20'' of the second component 21'' of the actuating portion 20. Furthermore, the vibrating element 32 overlaps with the first end 20' of the second component 21'' of the actuating portion 20. It should be understood that the first component 21' of the actuating portion 20 may be omitted, and in this case, the second component 21'' of the actuating portion 20 comprises a moisture-absorbing material that readily absorbs or adsorbs moisture.

[0078] The snap-action mechanism 22 includes an elastic member 24 and a plurality of engaging elements 26. The engaging elements 26 and the elastic member 24 are arranged to move relative to each other in response to a change in moisture, such that the elastic member 24 eventually disengages from the engaging element 26 and springs back, thereby causing a snap-action movement. In this example, the elastic member 24 is a tip formed at the first end 20' of the second member 21'' of the actuating portion 20. The first member 21' of the actuating portion 20 will respond to the change in moisture by changing its size (expanding or contracting), thereby causing the second member 21'' of the actuating portion 20 to move, such that the diameter of the second member 21'' surrounding the actuating portion 20 changes, and the elastic member 24 and the engaging elements 26 move relative to each other. Thus, when a change in moisture is present, the elastic member 24 will accumulate energy as it bends against the engaging element 26. As the elastic member 24 and the engaging element 26 continue to move relative to each other, the elastic member 24 will eventually release the energy rapidly and spring back to the other side of the engaging element 26. Therefore, the elastic member 24 can have a stable state on each side of the engaging element 26. It should be understood that the engaging element 26 may also have a certain degree of elasticity. Therefore, the first part 21' of the actuating part 20 will cause the snapping mechanism 22 to snap. The movement of the snapping mechanism 22 will cause the vibrating element 32 to vibrate, and the sound generating part 30 will generate a characteristic sound and transmit the characteristic sound to the structure 50 via the contact part 38. The engaging element 26 is a groove, recess, or protrusion.

[0079] It should be understood that at least one elastic component 24 of the snap mechanism 22 may be a plurality of elastic protrusions forming a recess at the second end 20'' of the second component 21'' of the actuating portion 20, and the engaging element 26 may be the tip of the second component 21'' of the actuating portion 20.

[0080] Figures 7a to 7c Details of a transducer 10 according to an example of this disclosure are shown. These figures specifically illustrate the vibrating element 32 of the sound-generating portion 30 of the transducer 10. The transducer 10 may be configured as disclosed in any of the preceding figures. For clarity, the actuating portion 20 and other parts of the transducer 10 are omitted from these figures.

[0081] The vibrating element 32 includes a vibrating portion 34 extending between a pivot point P and a free end 36. Therefore, the vibrating portion 34 is the portion of the vibrating element 32 capable of vibrating. The pivot point P defines a fixed point from which the vibrating portion 34 extends. The conversion element 10 may include means 14 for manually adjusting the length L of the vibrating portion 34 to manually influence at least one characteristic frequency of the characteristic sound generated by the conversion element 10 and / or multiple frequencies constituting a sequence of characteristic frequencies. By manually adjusting the length L of the vibrating portion 34, a specific and unique identifier can be assigned to the conversion element 10.

[0082] Figure 7a A sound-generating section 30 with two vibrating elements 32 is shown. In this example, the means 14 for adjusting the length L of the vibrating portion 34 of the vibrating element 32 includes a marker or toothed structure 14 for bending or removing a portion of the vibrating portion 34. The dotted portion of the lower vibrating element 32 has been removed, so its vibrating portion 34 is shorter than that of the upper vibrating element 32. In this way, the two vibrating elements 32 will produce different characteristic frequencies when vibrating.

[0083] Figure 7b and 7c Both diagrams illustrate a solution for adjusting the length L of the vibrating portion 34 of the vibrating element 32, comprising a slider element movable along the length of the vibrating element 32. The slider element 14 connects the vibrating element 32 to a fixed support structure 15, thereby constituting or defining a pivot point P of the vibrating portion 34. Therefore, the position of the slider element 14 determines the position of the pivot point P of the vibrating element 32. By moving the slider element 14, the pivot point P is moved, and the length L of the vibrating portion 34 can be adjusted.

[0084] Figure 8 A system 100 for acoustically detecting changes in moisture is shown as an example according to this disclosure. System 100 can be as follows: Figure 1 The configuration is as disclosed, and the conversion element 10 can be as follows: Figure 4a As for Figure 4c , Figure 5 , Figures 6a to 6b or Figures 7a to 7c As disclosed. In this example, system 100 is arranged in association with the piping system constituting structure 50.

[0085] System 100 includes a plurality of conversion elements 10 arranged near pipe connections or joints of piping system 50, and acoustic sensors 40 arranged on the pipes of piping system 50 at a distance from the conversion elements 10. Each conversion element 10 includes an actuating portion 20 and a sound generating portion 30, in this example, the sound generating portion 30 further including two vibrating elements 32. The actuating portion 20 comprises at least one material with hygroscopic properties, such that changes in moisture cause changes in the size and / or shape of the actuating portion, thereby causing movement of the actuating portion 20, which generates a characteristic sound. The actuating portion 20 may be configured to respond to increases and / or decreases in moisture.

[0086] The characteristic sound created by each conversion element 10 in system 100 is associated with a unique identifier and / or location of the conversion element 10. At least one processor 42, 62 of system 100 (see...) Figure 1 The system is configured to determine the location of moisture changes based on the unique identifier and / or location of the conversion element 10, which generates the recorded characteristic sound. Depending on the location of the conversion element 10, the characteristic sound propagating through the piping system from the conversion element 10 will vary. Alternatively or additionally, each conversion element 10 may have a differently configured vibrating element 32, such that each conversion element 10 is associated with a unique identifier. Therefore, when the moisture content increases at some point along the piping system 50, the corresponding conversion element 10 will generate a characteristic sound, and at least one processor 42, 62 will not only detect the increase in moisture but will also be able to determine the location of a leak in the piping system 50 based on the unique identifier of the conversion element 10.

[0087] Figure 9 A system 100 for acoustically detecting changes in moisture is shown as an example according to this disclosure. System 100 can be as follows: Figure 1 The configuration is as disclosed, and the conversion element 10 can be as follows: Figure 2a As for Figure 2b , Figures 3a to 3b or Figures 7a to 7c The configuration is as disclosed. In this example, system 100 is arranged in association with a pool containing a sink, and the conversion element 10 is disposed on the floor below the pool. The floor and walls of the room are mechanically connected and together form structure 50. Acoustic sensor 40 is disposed on the wall at a certain distance from the conversion element 10.

[0088] The figure also shows an enlarged view of the conversion element 10. The conversion element 10 includes an actuating portion 20 and a sound-generating portion 30. In this example, the sound-generating portion 30 further includes two vibrating elements 32. The sound-generating portion 30 also includes two contact portions 38 configured to physically contact the floor beneath the pool. The actuating portion 20 comprises at least one material with hygroscopic properties, such that changes in moisture cause movement of the actuating portion 20, which generates the characteristic sound. The actuating portion 20 can be configured to respond to increases and / or decreases in moisture.

[0089] The actuating portion 20 includes a jump mechanism 22 configured to perform a jump movement in response to a change in moisture to enter a stable state. This jump movement propagates through the conversion element 10, causing the sound generating portion 30 to generate a characteristic sound and transmit it to the floor 50 where the conversion element 10 is disposed. The jump mechanism 22 is a bistable mechanism configured to have a jump-instability characteristic, and is configured to perform a jump movement between a first stable state and a second stable state of the bistable mechanism in response to a change in moisture. The jump mechanism 22 is substantially dome-shaped and concave in the normal, unaffected state of the conversion element 10. The actuating portion 20 also includes a first component 21' made of a first material that readily absorbs or adsorbs moisture. When the moisture content increases, the first component 21' absorbs or adsorbs moisture, thereby expanding and increasing in size. The expanding first component 21' exerts a force on the dome-shaped jump mechanism 22, which eventually jumps and flips its shape. Therefore, the snap mechanism 22 will become convex. Thus, the first component 21' of the actuating portion 20 will actuate the snap movement of the snap mechanism 22. This movement of the snap mechanism 22 causes the sound generating portion 30 to produce a characteristic sound, and causes the contact portion 38 of the sound generating portion 30 to transmit this characteristic sound into the floor 50.

[0090] In this example, the vibrating element 32 is configured with vibrating portions 34 of different lengths, such that the characteristic sound includes at least two different characteristic frequencies. The snap mechanism 22 of the actuating portion 20 typically transitions rapidly between two stable states, and the rapid movement from one stable state to another causes the vibrating element 32 to vibrate, and causes the contact portion 38 of the sound generating portion 30 to transmit the generated characteristic sound into the structure 50.

[0091] Acoustic sensor 40 will record characteristic sounds, and at least one processor 42, 62 (see...) Figure 1The system will detect leaks, for example, those associated with sinks and faucets. Information about the detected leaks can be displayed on the user's mobile electronic device 70, allowing the user to be aware of the situation and take action if necessary to address the leak. When the leak is stopped and the moisture content associated with the switching element 10 decreases, the first component 21' of the actuation portion 20 will retract and return to the normal state of the switching element 10. The snap-action mechanism 22 can then be manually pressed to quickly return it to its concave state. In this way, the switching element 10 can be used multiple times.

[0092] Figure 10 An exemplary embodiment of a method for acoustically detecting changes in moisture according to this disclosure is shown. The method relates to a system 100 for acoustically detecting changes in moisture. System 100 can be as follows: Figures 1 to 9 The configuration is as shown in any of the diagrams.

[0093] The method includes providing s101 for converting moisture changes into a characteristic sound, wherein the conversion element 10 includes an actuating portion 20 having at least one material having hygroscopic properties, such that moisture changes cause the actuating portion 20 to move, the movement causing the conversion element 10 to generate the characteristic sound and transmit the characteristic sound to the structure 50.

[0094] The method further includes recording the characteristic sound generated by the conversion element 10 as structural sound propagating through the structure 50 by means of an acoustic sensor 40 mechanically connected to the structure 50 at a distance from at least one conversion element 10.

[0095] The method further includes detecting moisture changes in s103 based on characteristic sounds recorded by the acoustic sensor 40 via at least one processor 42, 62 coupled to the acoustic sensor 40. The processors 42, 62 can receive signals corresponding to the recorded characteristic sounds from the acoustic sensor 40, and can detect moisture changes based on the received signals.

[0096] The conversion element 10 may include a sound generating portion 30 having at least one vibrating element 32, the vibrating element being configured to generate vibration by movement of the actuation portion 20, such configuration of the at least one vibrating element 32 such that the characteristic sound includes at least one characteristic frequency and / or a plurality of frequencies constituting a characteristic frequency sequence, wherein the moisture change of s103 is detected based on at least one characteristic frequency and / or the plurality of frequencies constituting the characteristic frequency sequence.

[0097] The vibrating element 32 may include a vibrating portion 34 extending between the pivot point P and the free end 36 of the vibrating element 32, and the method may further include adjusting the length L of the vibrating portion 34 to manually influence at least one characteristic frequency and / or multiple frequencies constituting a characteristic frequency sequence. In this way, a user of the system 100 can manually assign a unique identifier to each conversion element 10, thereby facilitating the use of multiple conversion elements 10 in the same structure 50.

[0098] The method may include the step of providing s101 a plurality of conversion elements 10, wherein a characteristic sound created by each conversion element 10 is associated with a unique identifier and / or location of that conversion element 10. The step of detecting a change in humidity s103 may include determining the location of the change in humidity based on the unique identifier and / or location of the conversion element 10 that generated the recorded characteristic sound.

[0099] Those skilled in the art will recognize that this disclosure is not limited to the embodiments described above. They will also recognize that modifications and variations are possible within the scope of the appended claims.

Claims

1. A system (100) for acoustically detecting changes in humidity, the system (100) comprising: - At least one conversion element (10) for converting moisture changes into characteristic sounds; - An acoustic sensor (40), said acoustic sensor (40) being configured to be mechanically connected to the structure (50) at a distance from said at least one conversion element (10); and - Processor (42, 62), which is coupled to the acoustic sensor (20). The at least one conversion element (10) includes an actuating portion (20) having at least one material with hygroscopic properties, such that a change in moisture causes the actuating portion (20) to move, the movement causing the conversion element (10) to generate a characteristic sound and transmit the characteristic sound to the structure (50), wherein the acoustic sensor (40) is configured to record the characteristic sound generated by the at least one conversion element (10) as a structure sound propagating through the structure (50), and the processor (42, 62) is configured to detect the change in moisture based on the characteristic sound recorded by the acoustic sensor (40).

2. The system (100) according to claim 1, wherein, The conversion element (10) includes a sound generating portion (30) having at least one vibrating element (32) configured to generate vibration by movement of the actuating portion (20), the at least one vibrating element (32) being configured such that the characteristic sound includes at least one characteristic frequency and / or a plurality of frequencies constituting a sequence of characteristic frequencies.

3. The system (100) according to claim 2, wherein, The at least one vibration element (32) includes a vibration portion (34) extending between a pivot point (P) and a free end (36) of the vibration element (32), wherein the conversion element (10) includes means (14) for manually adjusting the length (L) of the vibration portion (34) in order to manually influence at least one characteristic frequency and / or multiple frequencies constituting a characteristic frequency sequence.

4. The system (100) according to claim 2 or 3, wherein, The actuation part (20) includes a jump mechanism (22) configured to perform a jump movement in response to the change in humidity to enter a stable state of the jump mechanism (22).

5. The system (100) according to claim 4, wherein, The jump mechanism (22) is a bistable mechanism configured to have a jump instability and is configured to perform the jump movement between a first stable state and a second stable state of the bistable mechanism in response to the change in humidity.

6. The system (100) according to claim 4, wherein, The snap mechanism (22) includes an elastic protrusion (24) and at least one engaging element (26), the elastic protrusion (24) and the at least one engaging element (26) being arranged to move relative to each other in response to a change in moisture, such that the elastic protrusion (24) eventually disengages from the at least one engaging element (26) and springs back, thereby causing the snap movement.

7. The system (100) according to claim 6, wherein, The actuating portion (20) is configured to surround the structure (50) such that there is an overlapping section (28) of the actuating portion (20), in which a first end (20') and a second end (20'') of the actuating portion (20) overlap each other, wherein the elastic protrusion (24) and the at least one engaging element (26) are arranged in the overlapping section (28) on opposite sides of the first end (20') and the second end (20'') of the actuating portion (20).

8. The system (100) according to claim 7, wherein, The actuating portion (20) includes a first component (21') which is arranged closest to the structure (50) and is configured to expand or contract in response to the change in moisture, thereby changing the diameter of the actuating portion (20) surrounding it, and the elastic protrusion (24) and the at least one engaging element (26) moving relative to each other.

9. The system (100) according to any one of claims 2 to 8, wherein, The sound generating portion (30) of the conversion element (10) includes at least one contact portion (38) configured to be physically contacted with the structure (50).

10. The system (100) according to claim 5, wherein, The jump mechanism (22) includes a dome-shaped component configured to jump in response to the change in moisture.

11. The system (100) according to any one of the preceding claims, wherein, The system (100) includes a plurality of conversion elements (10), wherein a characteristic sound created by each conversion element (10) is associated with a unique identifier and / or location of the conversion element (10), and the processor (42, 62) is configured to determine the location of the moisture change based on the unique identifier and / or location of the conversion element (10) that created the recorded characteristic sound.

12. A method for acoustically detecting changes in moisture, the method comprising: - Provide (s101) at least one conversion element (10) for converting the moisture change into a characteristic sound, wherein the conversion element (10) includes an actuating portion (20) having at least one material having hygroscopic properties, such that the moisture change causes the actuating portion (20) to move, the movement causing the conversion element (10) to generate the characteristic sound and transmit the characteristic sound to the structure (50); - By means of an acoustic sensor (40) mechanically connected to the structure (50) at a distance from the at least one conversion element (10), the characteristic sound generated by the conversion element (10) is recorded (s102) as structural sound propagating through the structure (50); and - The moisture change is detected (s103) by a processor (42, 62) coupled to the acoustic sensor (40) based on the characteristic sound recorded by the acoustic sensor (40).

13. The method according to claim 12, wherein, The conversion element (10) includes a sound generating portion (30) having at least one vibrating element (32) configured to generate vibration by movement of the actuating portion (20), the at least one vibrating element (32) being configured such that the characteristic sound includes at least one characteristic frequency and / or a plurality of frequencies constituting a characteristic frequency sequence, wherein the moisture change is detected based on the at least one characteristic frequency and / or the plurality of frequencies constituting the characteristic frequency sequence.

14. The method according to claim 13, wherein, The vibrating element (32) includes a vibrating portion (34) extending between the pivot point (P) and the free end (36) of the vibrating element (32), and the method further includes: - Adjust (s104) the length of the vibrating portion (34) so ​​as to manually influence at least one characteristic frequency and / or multiple frequencies constituting a characteristic frequency sequence.

15. The method according to any one of claims 12 to 14, comprising the step of providing (s101) a plurality of conversion elements (10), wherein, The characteristic sound created by each conversion element (10) is associated with the unique identifier and / or location of the conversion element (10), and the step of detecting (s103) the moisture change includes determining the location of the moisture change based on the unique identifier and / or location of the conversion element (10) that created the recorded characteristic sound.

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