Urine wetness detection device for a care article and urine wetness detection method

Abstract

The application provides a urine wetness detection device and method for a care product. The device comprises an absorption body, a collection circuit, a power supply module and an alarm module. The absorption body is used for absorbing liquid. The collection circuit is arranged on the absorption body and sequentially comprises an inner detection layer, a position layer and an outer detection layer. The inner detection layer is provided with a common return line. The inner detection layer and the outer detection layer are respectively formed by at least one detection layer. Each detection layer is provided with a sensing line to correspondingly conduct with the common return line and output a first electric signal to obtain depth information of the liquid when being wetted. The position layer comprises a first conductive layer, a second conductive layer and a sensing line. The first conductive layer and the second conductive layer are respectively provided with conductive lines to form a plurality of intersection points. When the liquid penetrates into the position layer along the thickness direction and simultaneously wets the conductive lines, the corresponding intersection points are conducted and output a second electric signal to collect area information of the liquid. The power supply module supplies power to the collection circuit. The alarm module sends an alarm signal according to the depth information and the area information.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of nursing supplies, and particularly relates to a urine wetness detection device for nursing supplies and a urine wetness detection method thereof. BACKGROUND

[0002] In the scene of long-time wearing of paper diapers or nursing pads and the like nursing supplies by the disabled elderly, infants, postoperative bedridden people and the like, the existing urine detection usually adopts a single-point resistance, capacitance or electrochemical sensor embedded in an absorbent pad to trigger an alarm by judging whether there is urine or measuring the concentration of a certain marker. However, the existing urine detection scheme is difficult to quantify the depth and the actual diffusion area reached by the urine in a single penetration process, and is prone to errors in urine volume depth estimation and area misjudgment due to non-continuous wetting, thereby causing early or delayed alarm, increasing the nursing frequency and use cost. SUMMARY

[0003] The present application provides a urine wetness detection device for nursing supplies and a urine wetness detection method thereof, which synchronously acquires urine depth information and area information in a single penetration process through the sequentially arranged inner detection layer, position layer and outer detection layer, and determines the effective depth according to the continuous layer-by-layer conduction, thereby avoiding errors in urine volume depth estimation and area misjudgment due to non-continuous wetting, and reducing the nursing frequency and use cost.

[0004] In a first aspect, the present application provides a urine wetness detection device for nursing supplies, which comprises an absorbent body, a collection circuit, a power supply module and an alarm module, the absorbent body being used for absorbing liquid; the collection circuit is arranged on the absorbent body and sequentially comprises an inner detection layer, a position layer and an outer detection layer along the thickness direction, the inner detection layer is provided with a common return line, and the inner detection layer and the outer detection layer are respectively composed of at least one detection layer, each detection layer is provided with a sensing line, so that when the liquid is wetted, the common return line and the corresponding sensing line are conductive and output a first electric signal, thereby collecting the depth information of the liquid, and the depth information is valid only when the liquid is continuously wetted layer by layer from the inner detection layer to the outer detection layer along the thickness direction; the position layer comprises a first conductive layer and a second conductive layer arranged in close contact, and the sensing line, the first conductive layer is close to the inner detection layer and is provided with a plurality of first conductive lines arranged in parallel, the second conductive layer is close to the outer detection layer and is provided with a plurality of second conductive lines arranged in parallel, and the first conductive lines and the second conductive lines form a plurality of intersection points; when the liquid penetrates into the position layer along the thickness direction and simultaneously wets the first conductive lines and the second conductive lines, the corresponding intersection points are conductive and output a second electric signal, thereby collecting the area information of the liquid; the power supply module is detachably electrically connected with the collection circuit and is used for supplying power to the collection circuit; and the alarm module is in wireless communication with the collection circuit and is used for sending an alarm signal according to the depth information and the area information.

[0005] Further, the sensing lines of the position layer are located between the second conductive lines and the outer detection layer, for generating auxiliary electrical signals when the liquid permeates into the position layer, to verify the area information.

[0006] Further, all the sensing lines are made of bendable conductive fibers, the same side end of each sensing line extends to the absorbing body and converges into a concentrated lead, and the rest part continuously extends in the corresponding layer according to the preset path, so that each sensing line deforms synchronously and maintains electrical continuity when the absorbing body is bent or twisted.

[0007] Further, the first conductive lines and the second conductive lines 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 area information.

[0008] Further, the surfaces of the first conductive lines and the second conductive lines are respectively covered with a moisture-swelling insulating layer, and after the insulating layer swells and breaks, the corresponding intersection point remains conductive, and the insulating performance is restored after the liquid evaporates.

[0009] Further, the acquisition circuit takes FPC flexible circuit board as the carrier, and all the sensing lines and the common return line converge to the FPC flexible circuit board through the concentrated lead to form the same plug-in end, for detachable electrical connection with the power supply module.

[0010] Further, the plug-in end forms detachable electrical connection with the power supply module through a plurality of buckling terminals, the plurality of buckling terminals are electrically connected with the concentrated lead, at least two buckling terminals are used as power supply terminals, and at least two buckling terminals are used as data communication terminals.

[0011] Further, the alarm module is built-in with a preset threshold, the preset threshold includes a urine volume threshold and an area threshold, and the alarm module only sends an alarm signal when the depth information reaches the urine volume threshold and the area information reaches the area threshold.

[0012] Further, the alarm module supports switching between single threshold mode and double threshold mode; when in single threshold mode, one of the depth information and the area information reaches the corresponding threshold to send an alarm signal; when in double threshold mode, the alarm module only sends an alarm signal when the depth information reaches the urine volume threshold and the area information reaches the area threshold.

[0013] In a second aspect, the urine wetness detection method is applied to the urine wetness detection device of the nursing product, and the urine wetness detection method comprises the following steps: the power supply module supplies power to the acquisition circuit, so that the common return line and each sensing line are in a standby detection state; when it is monitored that a liquid wets the inner detection layer and / or the outer detection layer, the acquisition circuit outputs a first electric signal according to the corresponding layer which is continuously turned on, so as to acquire depth information of the liquid, wherein the depth information is valid only when the layers are continuously turned on from the inner detection layer to the outer detection layer in the thickness direction, otherwise, the depth information is abnormal information; when it is monitored that the liquid seeps into the position layer and wets the first conductive line and the second conductive line at the same time, the acquisition circuit outputs a second electric signal according to the corresponding intersection which is turned on, so as to acquire area information of the liquid, wherein 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 electric signal when the liquid seeps into the position layer, so as to verify the area information; for scattered micro-zones which are less than one complete grid in the area information, the scattered micro-zones are converted according to a turn-on threshold and then counted into the area information; the depth information and / or the area information are wirelessly sent to the alarm module; and the alarm module compares the received depth information and / or area information with a preset threshold, and judges whether to send an alarm signal.

[0014] The urine wetness detection device of the nursing product and the urine wetness detection method thereof can simultaneously obtain accurate urine volume depth and diffusion area through the cooperation of multi-layer continuous conduction and orthogonal array in a single penetration, and can send instant or combined alarm signals as needed by means of a switchable double-threshold alarm mechanism, so as to significantly reduce false alarms, missed alarms and replacement times, and meet the needs of comfort, economy and remote monitoring. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained according to the structures shown in the drawings without creative labor.

[0016] Figure 1 A schematic diagram of the urine wetness detection device of the nursing product provided by the embodiments of the present application.

[0017] Figure 2 A structural block diagram of the urine wetness detection device of the nursing product provided by the embodiments of the present application.

[0018] Figure 3 A first schematic diagram of the acquisition circuit provided by the embodiments of the present application.

[0019] Figure 4The second schematic diagram of the acquisition circuit provided by the embodiment of the present application.

[0020] Figure 5 The schematic diagram of the orthogonal array provided by the embodiment of the present application.

[0021] Figure 6 The flow chart of the urine wetness detection method provided by the embodiment of the present application.

[0022] Label explanation in the figure: 1000 - nursing article; 100 - urine wetness detection device of the nursing article; 1 - absorption body; 2 - acquisition circuit; 20 - detection layer; 200 - induction line; 201 - common return line; 21 - inner detection layer; 22 - position layer; 220 - intersection; 221 - first conductive layer; 2210 - first conductive line; 222 - second conductive layer; 2220 - second conductive line; 23 - outer detection layer; 24 - buckling terminal; 3 - power supply module; 4 - alarm module; A - depth information; B - area information; P - coordinate information.

[0023] The implementation, functional features and advantages of the present application will be further explained with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further explained in detail with reference to the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of the present application.

[0025] The terms "first", "second", "third", "fourth" and the like (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar planning objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, in other words, the described embodiments are implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof can also include other contents, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0026] It should be noted that the terms "first", "second", etc. in the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features indicated, or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" can be explicitly or implicitly included one or more of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope claimed by the present application.

[0027] The present application provides a urine wetness detection device 100 of a care product. The care product 1000 can be a baby diaper, an adult incontinence pant, a postoperative bed care pad or a disposable pet urine pad, etc. which needs to absorb and monitor liquid such as urine, body fluid, etc. The urine wetness detection device 100 is integrated inside the care product 1000, which is used to capture the depth information A and the area information B of urine after the wearer urinates, so as to estimate the urine volume and the diffusion area by using the number of detection layers turned on and the effective area of the specific layer, and send a replacement alarm to the caregiver or guardian through a wireless way, thereby avoiding the missed detection, over detection and skin immersion risk caused by the traditional fixed time touch detection and naked eye observation, and significantly reducing the care frequency and use cost. In the following, the specific features of the urine wetness detection device 100 will be described taking urine as an example of liquid.

[0028] Please refer to Figure 1 and Figure 2 , the urine wetness detection device 100 includes an absorption body 1, a collection circuit 2, a power supply module 3, and an alarm module 4. In the present application, the urine wetness detection device 100 can be integrated inside the care product 1000, or partially integrated inside the care product 1000, such as the absorption body 1 and the collection circuit 2 integrated inside the care product 1000, and the power supply module 3 and the alarm module 4 located outside the care product 1000.

[0029] The absorption body 1 is used to absorb liquid. In the present application, the liquid can be quickly introduced by the surface layer of the absorption body 1, then spread horizontally and seep vertically in the absorption core of the absorption body 1, and finally be firmly locked by the super absorbent resin, avoiding side leakage and back seepage. At the same time, the absorption body 1 remains soft and foldable, providing a consistent and unbroken environment for the collection circuit 2, so that the depth information A and the area information B can be continuously and accurately captured.

[0030] The acquisition circuit 2 is arranged on the absorbent body 1 and comprises an inner detection layer 21, a position layer 22 and an outer detection layer 23 arranged in sequence along the thickness direction of the absorbent body 1. The inner detection layer 21, the position layer 22 and the outer detection layer 23 are all provided with an absorbent core of the absorbent body 1. The position relationship between the inner detection layer 21, the position layer 22 and the outer detection layer 23 is determined by the position relationship between the nursing article 1000 and the wearer. Specifically, the inner detection layer 21 is the side of the nursing article 1000 contacting the skin of the wearer, and the outer detection layer 23 is the side of the nursing article 1000 facing away from the wearer.

[0031] As shown in Figure 3 and Figure 4 , the inner detection layer 21 is provided with a common return line 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 is provided with a sensing line 200, so that when wetted by liquid, the common return line 201 and the corresponding sensing line 200 are conductive and output a first electrical signal, thereby acquiring the depth information A of the liquid. The position layer 22 comprises a first conductive layer 221 and a second conductive layer 222 arranged in close contact, and a sensing line 200. The first conductive layer 221 is close to the inner detection layer 21 and is provided with a plurality of first conductive lines 2210 arranged in parallel, and the second conductive layer 222 is close to the outer detection layer 23 and is provided with a plurality of second conductive lines 2220 arranged in parallel. The first conductive lines 2210 and the second conductive lines 2220 form a plurality of 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 conductive and output a second electrical signal, thereby acquiring the area information B of the liquid. Specifically, the plurality of first conductive lines 2210 arranged in parallel can be a plurality of first conductive lines 2210 arranged in parallel along the horizontal direction, and the plurality of second conductive lines 2220 arranged in parallel can be a plurality of second conductive lines 2220 arranged in parallel along the vertical direction. The first conductive lines 2210 and the second conductive lines 2220 are orthogonal to each other to 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 to form the area information B.

[0032] In this embodiment, the depth information A is valid only when it is continuously conducted layer by layer from the inner detection layer 21 to the outer detection layer 23 along the thickness direction, otherwise the depth information A is abnormal information. Taking the inner detection layer 21 as one detection layer 20 and the outer detection layer 23 as two detection layers 20 as an example, as shown in Figure 3As shown, when the sensing lines 200 of the inner detection layer 21, the detection layer 20 adjacent to the position layer 22, and the outer detection layer 23 adjacent to the position layer 22 (hereinafter referred to as the "first layer of the outer detection layer") are all wetted by the liquid, the common return line 201 is in conduction with the sensing lines 200 of the three layers and the three layers all output the first electrical signal. At this time, the first electrical signal of the three layers from the inner detection layer 21 to the outer detection layer 23 is collected. Therefore, the depth information A of the liquid can be represented as the layer farthest from the wearer's skin, that is, the first layer of the outer detection layer. In other embodiments, if the liquid only wets the inner detection layer 21 and the outer detection layer 23 far from the position layer 22 (hereinafter referred to as the "last layer of the outer detection layer"), and the position layer 22 and the first layer of the outer detection layer are always not in conduction, a non-continuous conduction occurs. At this time, the collection 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, and does not regard it as valid urine volume depth and upload it to the alarm module 4, triggering the abnormal flag, so as to avoid errors in the estimation of the urine volume depth due to non-continuous wetting.

[0033] In the present embodiment, the area information B is used to represent the distribution range of the liquid in the position layer 22. As shown, Figure 5 The minimum distinguishable unit of the area information B is each intersection point 220 formed by the orthogonal different conductive lines. Each intersection point 220 that is simultaneously wetted and in conduction corresponds to a coordinate information P (hereinafter referred to as "coordinate information P"). All the coordinate information P that is in conduction together composes the boundary actually covered by the liquid, so as to restore the area information B in a discrete grid manner, and further obtain the complete shape and corresponding area actually covered by the liquid.

[0034] Further, for the scattered micro-area formed in the area information B which is less than one complete grid, the collection circuit 2 can be quantified by the form of the conduction threshold. Specifically, when the adjacent first conductive line 2210 and the second conductive line 2220 of any intersection point 220 are continuously wetted by the liquid, and the parallel resistance value is lower than the conduction threshold, the point is recognized as a valid coordinate information P; if only one side of the conductive line is wetted or the resistance is higher than the conduction threshold, it is regarded as invalid. In this way, the scattered micro-area is discretized into sub-grid equivalent area (such as half-grid or 1 / 4-grid equivalent area) and is counted into the area information B together with the complete grid, so that the total area still approximates the real boundary. The conduction threshold in the present application can be a pre-set upper limit of resistance, which is used as a critical standard for distinguishing whether the first conductive line 2210 and the second conductive line 2220 are simultaneously wetted by the liquid.

[0035] In the embodiment, the common return line 201 and the sensing line 200 are located in the same detection layer 20. It can be understood that the common return line 201 should be located in the corresponding detection layer 20 in the inner detection layer 21. For example, when the inner detection layer 21 is composed of more than one detection layer 20, such as two detection layers 20, three detection layers 20, etc., the common return line 201 can be arranged in parallel on the corresponding detection layer 20 to keep the corresponding sensing line 200 in the same detection layer 20, so as to ensure that any layer is immediately formed into a local closed loop when wetted by liquid, shorten the response time of the output electrical signal, avoid single-point disconnection leading to the failure of the whole layer, and improve the reliability of deep detection.

[0036] In the embodiment, the sensing line 200 of the position layer 22 is located between the second conductive line 2220 and the outer detection layer 23, for generating an auxiliary electrical signal when liquid penetrates into the position layer 22, to verify the area information B. Specifically, when liquid penetrates into the position layer 22, in addition to the second electrical signal generated by the corresponding wetted first conductive line 2210 and the second conductive line 2220, the sensing line 200 of the position layer 22 and the common return line 201 also output an auxiliary electrical signal due to the bridging of the liquid. 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 signals substantially overlap, the area information B is directly confirmed; if only the auxiliary electrical signal shows edge wetting, the missing part is supplemented into the current area information B; if only the second electrical signal exists and the auxiliary electrical signal is missing, it is determined that there is local dryness or residual salt, and the corresponding area information B is modified or excluded, so as to ensure that the liquid diffusion boundary finally given is consistent with the actual situation, and avoid the area overestimation caused by the evaporation of residual salt.

[0037] In the embodiment, all the sensing lines 200 are made of bendable conductive fibers. The same side end of each sensing line 200 extends to the absorbent body 1 and converges into a concentrated lead-out end, and the remaining part continuously extends in the corresponding layer according to the preset path, so that each sensing line 200 deforms synchronously and maintains electrical continuity when the absorbent body 1 is bent or twisted. In the present application, the concentrated lead-out end collects the originally dispersed sensing lines 200 in the absorbent body 1 into one point at a time, and then is connected with the FPC flexible circuit board, which not only saves the redundant welding points caused by multiple sensing lines 200, but also allows the absorbent body 1 to only produce a small deformation at the concentrated lead-out end when it is worn, turned over, or rolled up, thereby reducing the risk of disconnection. 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 combined path formed by a snake shape and a ring, that is, the sensing line is first walked back and forth in a snake shape to ensure that the local position layer 22 can quickly form a loop with the common return line 201 when it is wet; then the sensing line is changed to a gradually tapered ring to gradually gather the conductive fibers to the concentrated lead-out end, so that the fibers are always in the elastic deformation zone and do not appear dead angle. The whole path has no right angle and sharp bend, and the corner formed by the preset path is transitioned by an arc, so that each segment of the sensing line 200 synchronously stretches and contracts when it is bent, maintains electrical continuity, and does not additionally increase the thickness of the sensing line 200.

[0038] The surfaces of the first conductive line 2210 and the second conductive line 2220 are respectively covered with a moisture-swelling insulating layer (not shown in the figure). After the insulating layer swells and breaks, the corresponding intersection 220 remains conductive, and the insulating property is restored after the liquid evaporates, so as to realize the cycle of single penetration and self-resetting, and the repeated work without false alarm.

[0039] The power supply module 3 is detachably electrically connected with the acquisition circuit 2, and is used for supplying power to the acquisition circuit 2. Specifically, all the sensing lines 200 and the common return line 201 converge to the FPC flexible circuit board through the concentrated lead-out end to form the same plug-in end, which is used for detachable electrical connection with the power supply module 3. In the present application, the plug-in end forms detachable electrical connection with the power supply module 3 through a plurality of buckling terminals 24. The plurality of buckling terminals 24 are located on the FPC flexible circuit board and are electrically connected with the concentrated lead-out end. Among them, at least two buckling terminals 24 are used as power supply terminals, and at least two buckling terminals 24 are used as data communication terminals. Therefore, the buckling terminals 24 in the present application are not less than four.

[0040] The alarm module 4 communicates wirelessly with the acquisition circuit 2, and is used for sending an alarm signal according to the depth information A and the area information B. Specifically, the alarm module 4 is built-in with preset threshold values. Among them, the preset threshold values include urine volume threshold value and area threshold value. Only when the depth information A reaches the urine volume threshold value and the area information B reaches the area threshold value, the alarm module 4 sends an alarm signal. In the present application, the preset threshold values can be self-defined according to the size of the nursing product 1000. For example, the urine volume threshold value can be 25-80 mL, and the area threshold value can be 80-150 cm 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:

[0042] 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.

[0043] 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.

[0044] 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.

[0045] Further, the alarm module 4 supports switching between single threshold mode and double threshold mode. When in single threshold mode, one of the depth information A and the area information B reaching the corresponding threshold value triggers the alarm signal to provide early warning, which is suitable for scenarios requiring frequent replacement, such as special groups of wearers who need to change frequently. When in double threshold mode, the alarm module 4 only triggers the alarm signal when the depth information A reaches the urine volume threshold value and the area information B reaches the area threshold value, that is, the urine volume and the area are judged simultaneously to avoid false positives caused by light infiltration.

[0046] Please refer to Figure 6 which is a flowchart of the urine wetness detection method provided by the embodiment of the present application. The present application also provides a urine wetness detection method. The urine wetness detection method is applied to the urine wetness detection device 100 of the nursing product. The specific features of the urine wetness detection device 100 of the nursing product have been described in detail above. The urine wetness detection method comprises steps S101-S105.

[0047] In step S101, the power supply module supplies power to the acquisition circuit, so that the common return line and each sensing line are in a standby detection state.

[0048] In step S101, the power supply module 3 supplies power to the FPC flexible circuit board through the buckling terminal 24, and provides stable working voltage for the common return line 201, each layer of sensing line 200, and the orthogonal array at one time. At the moment of power-on, the acquisition circuit 2 completes self-calibration, that is, scans the reference resistors of the inner detection layer 21, the outer detection layer 23, and the position layer 22 in turn, and records the current environmental humidity and temperature drift as a zero-point reference for subsequent judgment of conduction and abnormality, to ensure that all channels are at a known and consistent sensitivity level when entering the standby detection state.

[0049] In step S102, when it is monitored that the liquid wets the inner detection layer and / or the outer detection layer, the acquisition circuit outputs a first electrical signal according to the corresponding layer that is continuously conducted, to acquire the depth information of the liquid.

[0050] In step S102, the acquisition circuit 2 polls each detection layer 20 in the time sequence of the inner detection layer 21 to the outer detection layer 23. Specifically, the sensing lines 200 of the inner detection layer 21 are selected first, and then the layers are pushed in turn to the outer detection layer; only when liquid wetting occurs in adjacent two layers in turn, and the common return line 201 and the corresponding sensing line 200 are conducted, and the continuous conduction condition is met, the farthest effective layer is recorded as the current urine depth, and the current depth information A is locked at the same time. If it is found in polling that the layers are skipped or the intermediate layers always do not respond, it is marked as an abnormal frame, the data is discarded, and the next infiltration is waited for, so as to eliminate the depth misjudgment caused by local leakage or bending fracture.

[0051] Step S103, when the liquid is monitored to penetrate into the position layer and at the same time wet the first conductive line and the second conductive line, the acquisition circuit outputs the second electric signal according to the corresponding intersection point to be turned on, so as to acquire the area information of the liquid.

[0052] In step S103, in the same penetration period when the depth information A is valid, the acquisition circuit 2 immediately scans the orthogonal array. Specifically, each row and each column is selected in turn, and the parallel resistance of the intersection point 220 is compared with the conduction threshold value in real time. Once it is determined that the first conductive line 2210 and the second conductive line 2220 are wetted by the liquid at the same time, the coordinate information P of the intersection point 220 is set to be valid, and the auxiliary electric signal output by the sensing line 200 of the position layer 22 is read synchronously to perform boundary check. All valid coordinate information P is immediately spliced into the current area information B according to the row and column mapping, and the scattered micro area less than one grid is integrated into the total area after being converted by the conduction threshold value, so that the high-precision and non-missing urine diffusion contour capture is completed in one penetration.

[0053] Step S104, wirelessly sending the depth information and / or the area information to the alarm module.

[0054] In step S104, the acquisition circuit 2 packages the checked depth information A and the current area information B in the current penetration period into a data frame, and sends it to the Bluetooth through the data communication end of the buckling terminal 24. The Bluetooth sends the data frame to the alarm module 4 according to the preset broadcast interval, so as to ensure that the depth information A and the area information B are complete and timely to the alarm module 4, and provide a reliable basis for subsequent threshold value judgment.

[0055] Step S105, the alarm module compares the received depth information and / or area information with the preset threshold value, and judges whether to send an alarm signal.

[0056] In step S105, after the alarm module 4 receives the data frame through wireless communication, the checked depth information A and the area information B are extracted, and the corresponding preset threshold value is compared according to the current setting mode. For example, if the alarm module 4 works in a double threshold mode, the alarm module 4 sends a corresponding alarm signal (such as continuous fast flashing of red light, starting of bee sound, etc.) only when the depth information A reaches the urine volume threshold value and the area information B reaches the area threshold value, prompting that the nursing product 1000 must be replaced; if any index does not meet the standard, the alarm module 4 remains silent to avoid false alarm caused by light penetration. If the alarm module 4 works in a single threshold mode, any one of the depth information A or the area information B reaching the corresponding threshold value triggers the alarm signal (such as short light of green light, slight vibration, etc.), which is suitable for special groups who need to replace the product frequently, so as to realize early warning. Further, if the data of multiple frames in the single threshold mode are all out of standard, the alarm module 4 automatically upgrades the level to “emergency”, and sends a warning to the external terminal again through the Bluetooth, so as to form a hierarchical alarm and replace the product as needed, and balance comfort and saving.

[0057] It should be noted that the depth information A and the area information B can be sent wirelessly at the same time or separately. For example, the acquisition circuit 2 packages the depth information A and the area information B into the same data frame and sends them wirelessly at the same time to complete the broadcast at one time and save power consumption. When the depth information A first reaches the corresponding preset threshold, the depth information A can be immediately uploaded separately, and when the area information B subsequently meets the condition, the area information B is supplemented and sent, and the alarm module 4 buffers and combines for judgment. That is, both of the two sending modes can ensure that the alarm module 4 obtains complete depth information and area information, and ensures the judgment accuracy in the single threshold mode and the double threshold mode.

[0058] In the above embodiments, all or part can be realized by software, hardware or any combination thereof. When realized by software, all or part can be realized in the form of a computer program product. Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

[0059] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented by other ways. For example, the device embodiments described above are only schematic, for example, the division of the unit is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0060] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place or distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0061] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist independently, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0062] In the above embodiments, by cooperating with the multi-layer continuous conduction and the orthogonal array, the accurate urine volume depth and diffusion area can be obtained simultaneously by one-time penetration, and by means of the switchable double threshold alarm mechanism, the instant or combined alarm signals are sent as needed, thereby significantly reducing the false alarm, missed alarm and replacement frequency, and the comfort, economy and remote monitoring requirements are taken into account.

[0063] Obviously, various modifications and variations of the present application are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described.

[0064] It should be understood that, although each step in the flowchart of the accompanying drawings is shown in sequence according to the direction of the arrow, these steps are not necessarily executed in sequence according to the direction of the arrow. Unless otherwise specified herein, the execution of these steps is not strictly limited in sequence, and they can be executed in other sequences. Moreover, at least part of the steps in the flowchart of the accompanying drawings can include multiple sub-steps or multiple stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution sequence is not necessarily sequential, but can be executed in rotation or alternation with at least part of other steps or sub-steps or stages of other steps.

[0065] The above only lists the preferred embodiments of the present application, and of course cannot limit the scope of the rights of the present application, so the equivalent changes made according to the claims of the present application still belong to the scope covered by the present application.

Claims

1. A urine moisture detection device for nursing products, characterized in that, The urine detection device includes: Absorbent substrate, used to absorb 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 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 both the depth information reaches the urine volume threshold and the area information reaches the area threshold.

9. A method for detecting urine wetness, applied to a urine wetness detection device for nursing products as described in any one of claims 1-8, 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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