Urine wetness detection device and urine wetness detection method for nursing materials

Abstract

The invention provides a urination detection device and a urination detection method for nursing materials, the device comprises an absorption body, an acquisition circuit, a power supply module and an alarm module, the absorption body is used for absorbing liquid; the acquisition circuit is arranged on the absorption body and is sequentially provided with an inner detection layer, a position layer and an outer detection layer, the inner detection layer is provided with a common loop, each of the inner detection layer and the outer detection layer is composed of at least one detection layer, and each detection layer is provided with an induction line; when the liquid level sensor is wetted, the liquid level sensor is correspondingly conducted with the common loop and outputs a first electric signal to obtain depth information of liquid; the position layer comprises a first conductive layer, a second conductive layer and an induction line; the first conductive layer and the second conductive layer are respectively provided with conductive lines to form a plurality of cross points; when the liquid infiltrates into the position layer along the thickness direction and wets the conductor wire at the same time, the corresponding cross point is conducted and outputs a second electric signal to collect the regional information of the liquid; the power supply module supplies power to the acquisition circuit; the alarm module sends an alarm signal according to the depth information and the area information.

Description

Technical Field

[0001] This application relates to the field of nursing care products technology, and in particular to a urine wetness detection device and method for nursing care products. Background Technology

[0002] In scenarios where elderly people with disabilities, infants, and bedridden patients after surgery require prolonged use of diapers or nursing pads, current urine detection methods typically employ single-point resistance, capacitance, or electrochemical sensors embedded in the absorbent pad. Alarms are triggered by determining the presence of urine or measuring the concentration of a specific marker. However, existing urine detection solutions struggle to simultaneously quantify the depth and actual diffusion area of ​​urine during a single osmosis. Discontinuous wetting can lead to errors in urine depth estimation and area misjudgment, resulting in premature or delayed alarms, increasing the frequency of care and operating costs. Summary of the Invention

[0003] This application provides a urine wetness detection device and method for nursing products. By sequentially setting an inner detection layer, a position layer and an outer detection layer, urine depth information and area information are simultaneously obtained in a single penetration. The effective depth is determined based on continuous layer-by-layer conduction, avoiding errors in urine depth estimation and area misjudgment caused by discontinuous wetting, thereby reducing the frequency of nursing care and usage costs.

[0004] In a first aspect, embodiments of this application provide a wetness detection device for nursing products. The wetness detection device includes an absorption body, a data acquisition circuit, a power supply module, and an alarm module. The absorption body is used to absorb liquid. The data acquisition circuit is disposed on the absorption body and sequentially comprises an inner detection layer, a position layer, and an outer detection layer along the thickness direction. The inner detection layer has a common loop. The inner and outer detection layers are each composed of at least one detection layer. Each detection layer has a sensing line. When wetted by liquid, the common loop connects with the corresponding sensing line and outputs a first electrical signal, thereby acquiring the depth information of the liquid. The depth information is only valid when it is continuously connected layer by layer along the thickness direction from the inner detection layer to the outer detection layer. The position layer includes... The system comprises a first conductive layer and a second conductive layer, and the sensing lines. The first conductive layer is located near the inner detection layer and has multiple parallel first conductive lines. The second conductive layer is located near the outer detection layer and has multiple parallel second conductive lines. The first and second conductive lines form multiple intersection points. When liquid penetrates into the position layer along the thickness direction and simultaneously wets the first and second conductive lines, the corresponding intersection points are connected and output a second electrical signal, thereby acquiring the area information of the liquid. A power supply module is detachably electrically connected to the acquisition circuit and is used to supply power to the acquisition circuit. An alarm module is wirelessly connected to the acquisition circuit and is used to issue an alarm signal based on the depth information and area information.

[0005] Furthermore, the sensing line of the position layer is located between the second conductive line and the outer detection layer, and is used to generate an auxiliary electrical signal when the liquid penetrates the position layer to verify the area information.

[0006] Furthermore, all sensing lines are made of bendable conductive fibers, with the ends of each sensing line extending to the absorption body and converging into a centralized lead-out end. The remaining parts extend continuously within the corresponding layer according to a preset path, so that each sensing line deforms synchronously and maintains electrical continuity when the absorption body is bent or twisted.

[0007] Furthermore, the first conductive line and the second conductive line are orthogonal to each other to form an orthogonal array in the position layer, so that each intersection point has corresponding coordinate information in the position layer to form the region information.

[0008] Furthermore, the surfaces of the first and second conductive wires are respectively covered with an insulating layer that expands when wet. After the insulating layer expands and ruptures, the corresponding intersection remains conductive, and the insulating properties are restored after the liquid evaporates.

[0009] Furthermore, the acquisition circuit uses an FPC flexible circuit board as a carrier, and all sensing lines and the common return line are converged to the FPC flexible circuit board through the centralized lead-out terminal to form the same plug-in terminal, which is used for detachable electrical connection with the power supply module.

[0010] Furthermore, the plug-in terminal forms a detachable electrical connection with the power supply module through multiple snap-fit ​​terminals, the multiple snap-fit ​​terminals are electrically connected to the centralized lead-out terminal, at least two snap-fit ​​terminals are used as power supply terminals, and at least two snap-fit ​​terminals are used as data communication terminals.

[0011] Furthermore, the alarm module has a built-in preset threshold, which includes a urine volume threshold and an area threshold. The alarm module will only issue an alarm signal when the depth information reaches the urine volume threshold and the area information reaches the area threshold.

[0012] Furthermore, the alarm module supports switching between a single threshold mode and a dual threshold mode; in the single threshold mode, an alarm signal is issued when either the depth information or the area information reaches the corresponding threshold; in the dual threshold mode, the alarm module issues an alarm signal only when the depth information reaches the urine volume threshold and the area information reaches the area threshold.

[0013] Secondly, embodiments of this application provide a method for detecting urine wetness, applied to the aforementioned urine wetness detection device for nursing products. The method includes: supplying power to the acquisition circuit from the power supply module, so that the common loop and each sensing line are in a standby detection state; when liquid is detected wetting the inner detection layer and / or the outer detection layer, the acquisition circuit outputs a first electrical signal according to the corresponding continuously conductive layers to acquire the depth information of the liquid, wherein the depth information is only valid when it is continuously conductive layer by layer from the inner detection layer to the outer detection layer along the thickness direction; otherwise, the depth information is abnormal information; when liquid is detected to have penetrated into the position layer and simultaneously wet the first conductive line... When the second conductive line is connected, the acquisition circuit outputs a second electrical signal according to the corresponding intersection of the conduction to acquire the area information of the liquid. The sensing line of the position layer is located between the second conductive line and the outer detection layer, and is used to generate an auxiliary electrical signal when the liquid seeps into the position layer to verify the area information. For scattered micro-areas in the area information that are less than a complete grid, they are included in the area information after being converted according to the conduction threshold. The depth information and / or the area information are wirelessly transmitted to the alarm module. The alarm module compares the received depth information and / or area information with a preset threshold and determines whether to issue an alarm signal.

[0014] The aforementioned urine wetness detection device and its urine wetness detection method, through multi-layer continuous conduction and orthogonal array collaboration, can simultaneously obtain accurate urine volume depth and diffusion area in a single penetration. With the help of a switchable dual threshold alarm mechanism, it can issue immediate or combined alarm signals as needed, thereby significantly reducing false alarms, missed alarms and replacement frequency, and taking into account the needs of comfort, economy and remote monitoring. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of a urine detection device for nursing products provided in an embodiment of this application.

[0017] Figure 2 This is a structural block diagram of a wetness detection device for nursing products provided in an embodiment of this application.

[0018] Figure 3 This is a first schematic diagram of the acquisition circuit provided in an embodiment of this application.

[0019] Figure 4This is a second schematic diagram of the acquisition circuit provided in an embodiment of this application.

[0020] Figure 5 This is a schematic diagram of an orthogonal array provided in an embodiment of this application.

[0021] Figure 6 This is a flowchart of the urine wetness detection method provided in the embodiments of this application.

[0022] Explanation of the numbers in the diagram: 1000 - Nursing supplies; 100 - Wetness detection device for nursing supplies; 1 - Absorbent body; 2 - Acquisition circuit; 20 - Detection layer; 200 - Sensing line; 201 - Common return line; 21 - Inner detection layer; 22 - Position layer; 220 - Crossover point; 221 - First conductive layer; 2210 - First conductive line; 222 - Second conductive layer; 2220 - Second conductive line; 23 - Outer detection layer; 24 - Snap-on terminal; 3 - Power supply module; 4 - Alarm module; A - Depth information; B - Area information; P - Coordinate information.

[0023] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0025] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar planned objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data are interchangeable where appropriate; in other words, the described embodiments are implemented according to a sequence other than that illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, may also include other content; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0026] It should be noted that the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0027] This application provides a urine wetness detection device 100 for nursing care products. The nursing care product 1000 can be in the form of infant diapers, adult incontinence pants, postoperative bed rest pads, or disposable pet pee pads, etc., which require the absorption and monitoring of liquids such as urine and bodily fluids. The urine wetness detection device 100 is integrated inside the nursing care product 1000 and is used to capture the depth information A and area information B of urine after the wearer urinates. Based on this, it estimates the urine volume and diffusion area using the number of conductive detection layers and the effective area of ​​a specific layer, and wirelessly sends a replacement alarm to caregivers or guardians. This avoids the risks of missed detection, over-detection, and skin maceration associated with traditional timed touch and visual observation, significantly reducing the frequency of care and usage costs. The specific features of the urine wetness detection device 100 will be illustrated below using urine as an example.

[0028] Please refer to Figure 1 and Figure 2 The urine detection device 100 includes an absorption body 1, a data acquisition circuit 2, a power supply module 3, and an alarm module 4. In this application, the urine detection device 100 can be integrated inside or partially integrated inside the nursing product 1000, such as the absorption body 1 and the data acquisition circuit 2 being integrated inside the nursing product 1000, while the power supply module 3 and the alarm module 4 are located outside the nursing product 1000.

[0029] The absorber body 1 is used to absorb liquid. In this application, the liquid can be quickly introduced into the surface of the absorber body 1, then diffuses laterally and seeps vertically into the absorber core of the absorber body 1, and is finally firmly locked by the superabsorbent resin to prevent side leakage and backflow. At the same time, the absorber body 1 remains soft and flexible, providing a consistently close and unbreakable environment for the acquisition circuit 2, so that depth information A and area information B can be continuously and accurately captured.

[0030] The acquisition circuit 2 uses an FPC flexible circuit board as a carrier and is disposed on the absorption body 1, and has an inner detection layer 21, a position layer 22, and an outer detection layer 23 arranged sequentially along the thickness direction. In this application, the inner detection layer 21, the position layer 22, and the outer detection layer 23 all have their own absorption cores from the absorption body 1. The positions of the inner detection layer 21, the position layer 22, and the outer detection layer 23 are determined by the positional relationship between the care product 1000 and the wearer. Specifically, the inner detection layer 21 is the side of the care product 1000 that contacts the wearer's skin, and the outer detection layer 23 is the side of the care product 1000 that is away from the wearer.

[0031] like Figure 3 and Figure 4 As shown, the inner detection layer 21 has a common loop 201. The inner detection layer 21 and the outer detection layer 23 are each composed of at least one detection layer 20. Each detection layer 20 has a sensing line 200, so that when wetted by liquid, the common loop 201 and the corresponding sensing line 200 are connected and output a first electrical signal, thereby acquiring the liquid depth information A. The position layer 22 includes a first conductive layer 221 and a second conductive layer 222 attached to each other, as well as sensing lines 200. The first conductive layer 221 is close to the inner detection layer 21 and has multiple parallel first conductive lines 2210, while the second conductive layer 222 is close to the outer detection layer 23 and has multiple parallel second conductive lines 2220. The first conductive lines 2210 and the second conductive lines 2220 form multiple intersection points 220. When liquid penetrates into the position layer 22 along the thickness direction and simultaneously wets the first conductive lines 2210 and the second conductive lines 2220, the corresponding intersection points 220 are connected and output a second electrical signal, thereby acquiring the liquid area information B. Specifically, the multiple parallel first conductive lines 2210 can be multiple first conductive lines 2210 arranged horizontally, and the multiple parallel second conductive lines 2220 can be multiple second conductive lines 2220 arranged vertically. The first conductive lines 2210 and the second conductive lines 2220 are orthogonal to each other and form an orthogonal array in the position layer 22, so that each intersection point 220 has corresponding coordinate information P in the position layer 22, thus forming region information B.

[0032] In this embodiment, depth information A is only valid when it is continuously conducted layer by layer along the thickness direction from the inner detection layer 21 to the outer detection layer 23; otherwise, depth information A is abnormal information. Taking an example where the inner detection layer 21 is one detection layer 20 and the outer detection layer 23 is two detection layers 20, as shown... Figure 3As shown, when the sensing lines 200 of the inner detection layer 21's detection layer 20, the position layer 22, and the outer detection layer 23's detection layer 20 closest to the position layer 22 (hereinafter referred to as the "outer detection layer first layer") are all wetted by liquid, the common loop 201 is connected to the sensing lines 200 of these three layers, causing all three layers to output the first electrical signal. At this time, the first electrical signal of three consecutive layers from the inner detection layer 21 to the outer detection layer 23 is collected. Therefore, the liquid depth information A can be represented as the layer furthest from the wearer's skin, i.e., the outer detection layer first layer. In other embodiments, if the liquid only wets the inner detection layer 21 and the outer detection layer 23's detection layer 20 furthest from the position layer 22 (hereinafter referred to as the "outer detection layer last layer"), while the position layer 22 and the outer detection layer first layer are never connected, discontinuous connection occurs. At this time, the acquisition circuit 2 determines that the depth information A obtained from the inner detection layer 21 and the last layer of the outer detection layer is abnormal information. It does not regard it as valid urine volume depth and uploads it to the alarm module 4 to trigger the abnormal flag, so as to avoid errors in urine volume depth estimation due to discontinuous wetting.

[0033] In this embodiment, region information B is used to characterize the distribution range of the liquid within location layer 22. For example... Figure 5 As shown, the smallest resolvable unit of region information B is the intersection point 220 formed by different orthogonal conductive lines. Each intersection point 220 that is simultaneously wetted and conductive corresponds to a coordinate information P(x,y) (hereinafter referred to as "coordinate information P"). All conductive coordinate information P are combined to form the boundary of the actual liquid coverage, thereby reconstructing region information B in a discrete grid manner, and thus obtaining the complete shape and corresponding area of ​​the actual liquid coverage.

[0034] Furthermore, for scattered micro-regions in region information B that are less than a complete grid, the acquisition circuit 2 can quantize them using a conduction threshold. Specifically, when the adjacent first conductive line 2210 and second conductive line 2220 at any intersection 220 are continuously wetted by liquid, and their parallel resistance is lower than the conduction threshold, the point is considered valid coordinate information P; if only one conductive line is wetted or the resistance is higher than the conduction threshold, it is considered invalid. Thus, scattered micro-regions are discretized into sub-grid equivalent areas (such as the equivalent area of ​​half a grid or 1 / 4 grid) and included in region information B along with the complete grid, so that the total area still approximates the true boundary. In this application, the conduction threshold can be a pre-set upper limit of resistance value, used as a critical criterion to distinguish whether "the liquid simultaneously wets the first conductive line 2210 and the second conductive line 2220".

[0035] In this embodiment, the common loop 201 and the sensing line 200 are located in the same detection layer 20. It is understood that the common loop 201 should be located in the corresponding detection layer 20 within the inner detection layer 21. For example, when the inner detection layer 21 consists of more than one detection layer 20, such as two or three detection layers 20, the common loop 201 can be arranged in parallel on the corresponding detection layers 20 to maintain its position within the same detection layer 20 as the corresponding sensing line 200. This ensures that a local closed loop can be formed immediately when any layer is wetted by liquid, shortening the response time of the output electrical signal while avoiding single-point disconnection leading to entire layer failure, thus improving the reliability of depth detection.

[0036] In this embodiment, the sensing line 200 of the position layer 22 is located between the second conductive line 2220 and the outer detection layer 23, and is used to generate an auxiliary electrical signal when liquid seeps into the position layer 22 to verify the area information B. Specifically, after liquid seeps into the position layer 22, in addition to the second electrical signal generated by the corresponding wetted first conductive line 2210 and second conductive line 2220, an auxiliary electrical signal is also output between the sensing line 200 of the position layer 22 and the common return line 201 due to liquid bridging. At this time, the acquisition circuit 2 synchronously compares the second electrical signal and the auxiliary electrical signal: if the wetting boundaries reflected by the two are basically overlapping, the area information B is directly confirmed; if only the auxiliary electrical signal shows edge wetting, the missing part is added to the current area information B; if only the second electrical signal is present and the auxiliary electrical signal is missing, it is determined to be local drying or salt residue, and the corresponding area information B is corrected or removed, thereby ensuring that the final liquid diffusion boundary is consistent with the actual situation and avoiding overestimation of the area caused by evaporated residual salt.

[0037] In this embodiment, all sensing lines 200 are made of bendable conductive fibers. The ends of each sensing line 200 extend to the absorbing body 1 and converge into a centralized lead-out end. The remaining portions extend continuously within the corresponding layer according to a preset path, ensuring that the sensing lines 200 deform synchronously and maintain electrical continuity when the absorbing body 1 is bent or twisted. In this application, the centralized lead-out end gathers the sensing lines 200, originally scattered across the absorbing body 1, to a single point and then connects to the FPC flexible circuit board. This eliminates the redundancy of solder joints caused by multiple sensing lines 200 and ensures that the absorbing body 1 undergoes only minor deformation at this centralized lead-out end during wearing, turning over, or curling, reducing the risk of wire breakage. The preset path can be arranged according to the shape of the FPC flexible circuit board in the acquisition circuit 2. For example, the preset path can be a combination of a serpentine and a loop path. First, the wires travel back and forth in a serpentine pattern to ensure that they can quickly form a loop with the common return line 201 even when the area within the position layer 22 is locally moist. Then, the path changes to a gradually narrowing loop to bring the conductive fibers closer to the concentrated lead-out end, ensuring that the fibers remain in the elastic deformation zone without any sharp bends. The entire path has no sharp right-angle bends; the corners formed by the preset path are transitioned with arcs, allowing each segment of the induction wire 200 to expand and contract synchronously when bending, maintaining electrical continuity without increasing the thickness of the induction wire 200.

[0038] The surfaces of the first conductive wire 2210 and the second conductive wire 2220 are respectively covered with an insulating layer that expands when exposed to moisture (not shown in the figure). After the insulating layer expands and ruptures, the corresponding intersection 220 remains conductive, and the insulating properties are restored after the liquid evaporates, so as to realize a cycle of single penetration and self-reset, which can work repeatedly without false alarms.

[0039] The power supply module 3 is detachably grounded to the acquisition circuit 2 and is used to supply power to the acquisition circuit 2. Specifically, all induction lines 200 and the common return line 201 converge at a central lead-out terminal to form a single plug-in terminal on the FPC flexible circuit board, which is used for detachable grounding to the power supply module 3. In this application, the plug-in terminal forms a detachable electrical connection with the power supply module 3 through multiple snap-fit ​​terminals 24. The multiple snap-fit ​​terminals 24 are located on the FPC flexible circuit board and are electrically connected to the central lead-out terminal. Among them, at least two snap-fit ​​terminals 24 are used as power supply terminals, and at least two snap-fit ​​terminals 24 are used as data communication terminals. Therefore, in this application, there are no fewer than four snap-fit ​​terminals 24.

[0040] The alarm module 4 communicates wirelessly with the acquisition circuit 2 to issue an alarm signal based on depth information A and area information B. Specifically, the alarm module 4 has built-in preset thresholds, including a urine volume threshold and an area threshold. The alarm module 4 only issues an alarm signal when both depth information A and area information B reach the urine volume threshold and area information B reaches the area threshold. In this application, the preset thresholds can be customized according to the size of the nursing product 1000. For example, the urine volume threshold can be 25-80 mL, and the area threshold can be 80-150 cm². 2In this process, whether depth information A has reached the urine volume threshold can be determined by combining the number of conductive layers confirmed by depth information A with the fluid content of each layer and the effective area of ​​the location layer confirmed by region information B, thereby determining whether the urine volume threshold has been reached.

[0041] When the absorbent cores of the inner detection layer 21, position layer 22, and outer detection layer 23 are identical, the liquid retention of each layer is considered to be the same. Once the number of continuously conductive layers is determined, the contribution of the layer furthest from the wearer's skin to the current urine volume is linearly additive; therefore, the depth coefficient is defined as being determined by the number of continuously conductive layers. Thus, the current urine volume can be calculated using the following formula: V = q × S × kn; where V represents the current urine volume, q represents the fluid retention volume, S represents the effective area of ​​the location layer confirmed by the regional information B, and kn represents the depth coefficient.

[0042] For example, for standard 0.9% physiological saline, under conditions of 25°C and 1 atmosphere, per 1 cm 2 Once the absorbent core is saturated, it can lock in approximately 0.08 mL of liquid, meaning the liquid retention q in each layer is 0.08 mL. If the effective area S of the location layer, confirmed by area information B, is 120 cm², and the inner detection layer, location layer, and outer detection layer are continuously conductive with kn=3, then the current urine volume V=0.08 mL / cm². 2 ×120cm 2 ×3=28.8mL. When alarm module 4 is preset with a urine volume threshold of 25ml and an area threshold of 110cm²... 2 At this point, based on the calculation results of the current urine volume, it is confirmed that depth information A has reached the urine volume threshold and area information B has reached the area threshold. At this time, alarm module 4 issues an alarm signal.

[0043] Understandably, the fluid retention q can be obtained through pre-calibration. For example, 10 nursing supplies 1000 can be randomly sampled on the production line, and 10 mL, 20 mL...100 mL of standard saline can be injected into them respectively; the actual number of conductive layers and the effective area of ​​the position layer after each injection can be recorded, and the corresponding fluid retention can be derived according to the calculation formula of the current urine volume. The average value can be taken to obtain the fluid retention of this batch; the fluid retention of the current batch can be written into the alarm module 4 so that when the wearer uses the same batch of nursing supplies 1000, the corresponding fluid retention can be directly used.

[0044] Furthermore, alarm module 4 supports switching between single-threshold mode and dual-threshold mode. In single-threshold mode, an alarm signal is issued when either depth information A or area information B reaches the corresponding threshold, providing an early warning. This is suitable for scenarios requiring frequent replacement, such as when the wearer is a special group that needs to change frequently. In dual-threshold mode, alarm module 4 only issues an alarm signal when both depth information A reaches the urine volume threshold and area information B reaches the area threshold, thus simultaneously judging urine volume and area to avoid false alarms due to mild leakage.

[0045] Please refer to Figure 6 This is a flowchart of the urine wetness detection method provided in the embodiments of this application. This application also provides a urine wetness detection method. The urine wetness detection method is applied to a urine wetness detection device 100 for nursing products. The specific features of the urine wetness detection device 100 for nursing products have been described in detail above. The urine wetness detection method includes steps S101-S105.

[0046] Step S101: Power is supplied to the acquisition circuit by the power supply module, so that the common return line and each sensing line are in standby detection state.

[0047] In step S101, the power supply module 3 supplies power to the FPC flexible circuit board via the snap-fit ​​terminal 24, providing a stable operating voltage to the common return line 201, each layer of sensing lines 200, and the quadrature array in one go. At the moment of power-on, the acquisition circuit 2 completes self-calibration, that is, it sequentially scans the reference resistors of the inner detection layer 21, the outer detection layer 23, and the position layer 22, and records the current ambient humidity and temperature drift as a zero-point reference for subsequent judgment of conduction and abnormality, ensuring that all channels are at a known and consistent sensitivity level when entering the standby detection state.

[0048] In step S102, when liquid is detected wetting the inner detection layer and / or the outer detection layer, the acquisition circuit outputs a first electrical signal based on the corresponding continuously conducting layer to acquire the depth information of the liquid.

[0049] In step S102, the acquisition circuit 2 polls each detection layer 20 in a sequential manner from the inner detection layer 21 to the outer detection layer 23. Specifically, it first selects the sensing line 200 of the inner detection layer 21, and then proceeds layer by layer to the outer detection layer. Only when two adjacent layers are successively wetted by liquid, and the common loop 201 is connected to the corresponding sensing line 200, and the continuous conduction condition is met, is the farthest effective layer recorded as the current urine depth, and the current depth information A is locked. If a skipped layer or an intermediate layer is found to be unresponsive during the polling, it is marked as an abnormal frame, the data is discarded, and the system waits for the next penetration, thereby preventing depth misjudgment caused by local leakage or bending / breakage.

[0050] In step S103, when liquid is detected to have seeped into the position layer and simultaneously wetted the first and second conductive lines, the acquisition circuit outputs a second electrical signal based on the corresponding intersection of the conductive lines to acquire the area information of the liquid.

[0051] In step S103, within the same osmosis cycle where depth information A is valid, the acquisition circuit 2 immediately scans the orthogonal array. Specifically, it sequentially selects each row and column, comparing the parallel resistance of the intersection point 220 with the conduction threshold in real time. Once it is determined that "the first conductive line 2210 and the second conductive line 2220 are simultaneously wetted by liquid," the coordinate information P of the intersection point 220 is set to valid, and the auxiliary electrical signal output by the sensing line 200 of the position layer 22 is read simultaneously for boundary verification. All valid coordinate information P is immediately combined into the current area information B by row and column mapping. For scattered micro-areas less than one grid, they are converted according to the conduction threshold and included in the total area, thereby completing high-precision and complete urine diffusion contour capture in one osmosis.

[0052] Step S104: Wirelessly transmit depth information and / or area information to the alarm module.

[0053] In step S104, the acquisition circuit 2 packages the verified depth information A and the current area information B within the current penetration cycle into a data frame, and sends it to Bluetooth via the data communication terminal of the latching terminal 24. Bluetooth transmits the encrypted data to the alarm module 4 at a preset broadcast interval, ensuring that the depth information A and area information B arrive at the alarm module 4 completely and in a timely manner, providing a reliable basis for subsequent threshold judgment.

[0054] In step S105, the alarm module compares the received depth information and / or area information with a preset threshold and determines whether to issue an alarm signal.

[0055] In step S105, after receiving the data frame via wireless communication, the alarm module 4 immediately extracts the verified depth information A and area information B, and compares them with the corresponding preset thresholds according to the current setting mode. For example, if the alarm module 4 operates in dual-threshold mode, it will only issue a corresponding alarm signal (such as a red light flashing rapidly, a buzzer sounding, etc.) when both depth information A and area information B reach the area threshold, prompting that nursing supplies 1000 must be replaced; otherwise, it will remain silent to avoid false alarms. If the alarm module 4 operates in single-threshold mode, an alarm signal will be triggered when either depth information A or area information B reaches the corresponding threshold (such as a green light flashing briefly, a slight vibration, etc.), suitable for special groups that need frequent replacement, providing early reminders. Furthermore, if multiple consecutive frames of data exceed the standard in single-threshold mode, the alarm module 4 will automatically upgrade the level to "emergency" and wirelessly send a warning to an external terminal again via Bluetooth, forming a tiered alarm system for on-demand replacement, balancing comfort and cost-effectiveness.

[0056] It should be noted that depth information A and area information B can be transmitted wirelessly simultaneously or separately. For example, acquisition circuit 2 packages depth information A and area information B into a single data frame and transmits them wirelessly simultaneously, completing the task in a single broadcast, thus saving power. When depth information A reaches the corresponding preset threshold first, depth information A can be uploaded immediately. Area information B is then transmitted later when the threshold is met. Alarm module 4 buffers and combines the data for judgment. In other words, both transmission methods ensure that alarm module 4 obtains complete depth and area information, ensuring accurate judgment in both single-threshold and dual-threshold modes.

[0057] In the above embodiments, the systems, devices, and units described above can be implemented entirely or partially through software, hardware, or any combination thereof. When implemented using software, they can be implemented entirely or partially in the form of a computer program product. Those skilled in the art will readily understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0058] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between devices or units through some interfaces, and may be electrical, mechanical, or other forms.

[0059] The unit described as a separate component may or may not be physically separate. The component shown as a unit may or may not be a physical unit; that is, it may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0060] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist independently, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0061] In the above embodiments, through multi-layer continuous conduction and orthogonal array collaboration, accurate urine depth and diffusion area can be obtained simultaneously in a single penetration. With the help of a switchable dual threshold alarm mechanism, alarm signals can be issued instantly or in combination as needed, thereby significantly reducing false alarms, missed alarms and replacement frequency, while taking into account comfort, economy and remote monitoring needs.

[0062] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

[0063] It should be understood that although the steps in the flowcharts of the accompanying figures are shown sequentially as indicated by the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the accompanying figures may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps.

[0064] The above-listed embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of this application. Therefore, any equivalent variations made in accordance with the claims of this application shall still fall within the scope of this application.

Claims

1. A urine moisture detection device for nursing products, characterized in that, The urine detection device includes: Absorbent substrate, used for absorbing liquids; A data acquisition circuit is disposed on the absorption body and has an inner detection layer, a position layer, and an outer detection layer arranged sequentially along the thickness direction. The inner detection layer has a common loop. The inner and outer detection layers are each composed of at least one detection layer. Each detection layer has a sensing line. When wetted by liquid, the common loop and the corresponding sensing line are connected and output a first electrical signal, thereby acquiring the depth information of the liquid. The depth information is only valid when it is continuously connected layer by layer from the inner detection layer to the outer detection layer along the thickness direction. The position layer includes a first conductive layer and a second conductive layer that are attached together, as well as the sensing line. The first conductive layer is close to the inner detection layer and has multiple parallel first conductive lines. The second conductive layer is close to the outer detection layer and has multiple parallel second conductive lines. The first conductive lines and the second conductive lines form multiple intersection points. When liquid penetrates into the position layer along the thickness direction and simultaneously wets the first and second conductive lines, the corresponding intersection points are connected and output a second electrical signal, thereby acquiring the area information of the liquid. A power supply module, detachably connected to the acquisition circuit, is used to supply power to the acquisition circuit; and The alarm module communicates wirelessly with the acquisition circuit and is used to issue an alarm signal based on the depth information and area information.

2. The urine moisture detection device for nursing products as described in claim 1, characterized in that, The sensing line of the position layer is located between the second conductive line and the outer detection layer, and is used to generate an auxiliary electrical signal when the liquid seeps into the position layer to verify the area information.

3. The urine moisture detection device for nursing products as described in claim 2, characterized in that, All sensing wires are made of flexible conductive fibers. The ends of each sensing wire extend to the absorption body and converge into a central lead-out end. The remaining parts extend continuously in the corresponding layer according to a preset path, so that each sensing wire deforms synchronously and maintains electrical continuity when the absorption body is bent or twisted.

4. The urine moisture detection device for nursing products as described in claim 1, characterized in that, The first conductive line and the second conductive line are orthogonal to each other and form an orthogonal array in the position layer, so that each intersection point has corresponding coordinate information in the position layer to form the region information.

5. The urine moisture detection device for nursing products as described in claim 1, characterized in that, The surfaces of the first and second conductive wires are respectively covered with an insulating layer that expands when wet. After the insulating layer expands and ruptures, it keeps the corresponding intersection point conductive and restores its insulating properties after the liquid evaporates.

6. The urine moisture detection device for nursing products as described in claim 3, characterized in that, The acquisition circuit uses an FPC flexible circuit board as a carrier. All sensing lines and the common return line are converged to the FPC flexible circuit board through the centralized lead-out terminal to form the same plug-in terminal, which is used for detachable grounding connection with the power supply module.

7. The urine moisture detection device for nursing products as described in claim 6, characterized in that, The plug-in terminal forms a detachable electrical connection with the power supply module through multiple snap-fit ​​terminals. The multiple snap-fit ​​terminals are electrically connected to the centralized lead-out terminal. At least two snap-fit ​​terminals are used as power supply terminals, and at least two snap-fit ​​terminals are used as data communication terminals.

8. The urine moisture detection device for nursing products as described in claim 1, characterized in that, The alarm module has a built-in preset threshold, which includes a urine volume threshold and an area threshold. The alarm module will only issue an alarm signal when the depth information reaches the urine volume threshold and the area information reaches the area threshold.

9. The urine moisture detection device for nursing products as described in claim 8, characterized in that, The alarm module supports switching between a single threshold mode and a dual threshold mode. In the single threshold mode, an alarm signal is issued when either the depth information or the area information reaches the corresponding threshold. In the dual threshold mode, the alarm module issues an alarm signal only when the depth information reaches the urine volume threshold and the area information reaches the area threshold.

10. A method for detecting urine wetness, applied to a urine wetness detection device for nursing products as described in any one of claims 1-9, characterized in that, The urine detection method includes: S101. Power is supplied to the acquisition circuit by the power supply module, so that the common return line and each sensing line are in standby detection state. S102. When liquid is detected wetting the inner detection layer and / or the outer detection layer, the acquisition circuit outputs a first electrical signal according to the corresponding continuously conducting layers to acquire the depth information of the liquid. The depth information is only valid when it is continuously conducted layer by layer from the inner detection layer to the outer detection layer along the thickness direction. Otherwise, the depth information is abnormal information. S103. When liquid is detected to have seeped into the position layer and simultaneously wetted the first and second conductive lines, the acquisition circuit outputs a second electrical signal based on the corresponding intersection of the conductive lines to acquire the area information of the liquid. The sensing line of the position layer is located between the second conductive line and the outer detection layer, and is used to generate an auxiliary electrical signal when the liquid seeps into the position layer to verify the area information. For scattered micro-areas in the area information that are less than a complete grid, they are included in the area information after being converted according to the conduction threshold. S104. Wirelessly transmit the depth information and / or the area information to the alarm module; S105. The alarm module compares the received depth information and / or area information with a preset threshold and determines whether to issue an alarm signal.

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