JP3194932U - Urine leak sensor and urine leak detection system - Google Patents

Abstract

A urine leak sensor and a urine leak detection system that are simple in configuration because a voltage does not need to be constantly applied and a power supply device is unnecessary for the operation of the sensor, and that can detect a small amount of urine leakage with high sensitivity. I will provide a. A urine leak sensor 10 used in the vicinity of a diaper includes a positive electrode, a positive lead wire 12 electrically connected to the positive electrode, and a negative electrode formed of a metal material having a higher ionization tendency than the positive electrode. A negative lead wire 13 electrically connected to the negative electrode; an electrolyte-containing layer that is inserted in close contact between the positive electrode and the negative electrode and contains an electrolyte; and a positive electrode, an electrolyte-containing layer, and a negative electrode And a water battery provided with an exterior material 11 having water absorption. [Selection] Figure 1

Description

  The present invention relates to a urine leak sensor for detecting urine leak and a urine leak detection system using the urine leak sensor.

  In hospitals, nursing homes, homes, etc., diapers of patients and care recipients can be replaced at regular intervals regardless of the presence or absence of urine leakage, or when diaper leakage is found by checking the diaper directly. Generally done. However, according to such a system, patients and caregivers who have urine leakage and are unable to report themselves are forced to wait in that state until the next replacement or check period. May cause skin diseases such as rash.

  In order to improve such inconvenience, various urine leakage sensors that detect the occurrence of urine leakage have been proposed (for example, Patent Documents 1 to 4).

  All of the urine leak sensors described in these patent documents detect that the electrodes are short-circuited by urine or the electrical conductivity between the electrodes is changed by urine.

JP-A-5-031100 JP-A-1-277558 Japanese Utility Model Publication No. 3-015063 JP 2007-240470 A

  However, the conventional urine leakage sensor based on such a detection method needs to always apply a voltage to the sensor, which may come into contact with the human body, so even if the voltage is low, it is safe. In addition to the problem, the configuration is complicated because a power supply device is required.

  Furthermore, the conventional urine leakage sensor cannot detect this unless the electrodes are short-circuited or a sufficient amount of urine leakage occurs to change the electrical conductivity.

  Accordingly, an object of the present invention is to provide a urine leak sensor and a urine leak detection system that do not require a voltage to be constantly applied.

  Another object of the present invention is to provide a urine leak sensor and a urine leak detection system that do not require a power supply device for the operation of the sensor and have a simple configuration.

  Still another object of the present invention is to provide a highly sensitive urine leak sensor and urine leak detection system capable of detecting even a small amount of urine leak.

  According to the present invention, a urine leakage sensor used in the vicinity of a diaper is a positive electrode, a positive lead wire electrically connected to the positive electrode, and a negative electrode formed of a metal material having a higher ionization tendency than the positive electrode. A negative lead wire electrically connected to the negative electrode, an electrolyte containing layer inserted in close contact between the positive electrode and the negative electrode, containing an electrolyte and having water absorption, a positive electrode, an electrolyte containing layer, and a negative electrode It has a water battery that is encapsulated and has a water-absorbing exterior material.

  When the outer packaging material of the water battery arranged near the diaper absorbs urine, the urine penetrates into the electrolyte-containing layer, and the positive electrode and the negative electrode formed of a metal material having a higher ionization tendency, that is, the ionization tendency are different from each other. An electromotive force is generated between the different electrodes, and this is taken out by the positive and negative lead wires. Since such a water battery is used to detect urine leakage, it is not necessary to always apply a voltage, which is very safe. In addition, a power supply device is not required for the operation, and therefore, the configuration is very simple and it can be manufactured at low cost. Furthermore, since it operates only by penetrating a small amount of urine, even a small amount of urine leakage can be detected with high sensitivity.

  The positive electrode includes a carbonized layer and a positive electrode lead electrode electrically connected to the carbonized layer, a positive lead wire is electrically connected to the positive electrode lead electrode, and the electrolyte-containing layer is a carbonized layer and A fixing material provided in close contact with the negative electrode, the negative electrode being formed of a magnesium alloy having a higher ionization tendency than the positive electrode, and fixing the carbonized layer, the positive electrode extraction electrode, the electrolyte-containing layer, and the negative electrode by pressure bonding to each other; It is preferable to provide.

  Carbonized sheet material of woven fabric, knitted fabric, woven or knitted fabric or nonwoven fabric obtained by heating carbonization of raw fiber body made of woven fabric, knitted fabric, woven or knitted fabric or nonwoven fabric with carbonized layer made of cellulosic fiber yarn It is also preferable.

  The electrolyte-containing layer is preferably a sheet material containing 5% or more of sodium chloride as an electrolyte.

  It is also preferable that the electrolyte-containing layer is a sheet material made of a woven fabric, a knitted fabric, a woven / knitted fabric, a non-woven fabric or a paper having water absorption containing an electrolyte by impregnating the electrolyte solution and drying.

  It is also preferable that a positive electrode support plate for supporting the positive electrode extraction electrode is further provided, and the carbonized layer is provided in close contact with the periphery of the positive electrode extraction electrode and the positive electrode support plate.

  It is also preferable that the exterior material is a sheet material made of woven fabric, knitted fabric, woven / knitted fabric, nonwoven fabric or paper having water absorption.

  According to the present invention, there is further provided a urine leak detection system comprising the urine leak sensor described above and urine leak notification means for notifying that urine leak has occurred when an electromotive voltage is output from the urine leak sensor. . If a light display means that outputs light when notified from a urine leak sensor or a vibration generator or buzzer that outputs sound is used as the urine leak notification means, a power supply device is unnecessary and the configuration is very simple. And can be manufactured at low cost. The urine leak notification means may be a nurse call system. According to the present invention, it is not necessary to always apply a voltage to the urine leak sensor itself, which is very safe. In addition, since the water battery operates only when a small amount of urine permeates, even a small amount of urine leakage can be detected with high sensitivity.

  According to the present invention, still further, the above-described urine leakage sensor, a transmitter for transmitting a radio signal for notifying the occurrence of urine leakage when an electromotive voltage is output from the urine leakage sensor, and the transmitted radio signal are received. There is provided a urine leak detection system including a receiver that outputs a human urine leak occurrence signal and urine leak notification means for notifying that a urine leak has occurred when a urine leak occurrence signal is output from the receiver. The urine leak notification means may be a light display means for outputting light when a urine leak occurrence signal is output, a vibration generator or buzzer for outputting sound, or a nurse call system. According to the present invention, this makes it possible to monitor urine leakage from a remote location. Further, it is not necessary to always apply a voltage to the urine leak sensor itself, which is very safe. In addition, since the water battery operates only when a small amount of urine permeates, even a small amount of urine leakage can be detected with high sensitivity.

  According to the present invention, since leakage of urine is detected using a water battery, it is not necessary to always apply a voltage, which is very safe. In addition, a power supply device is not required for the operation, and therefore, the configuration is very simple and it can be manufactured at low cost. Furthermore, since it operates only by penetrating a small amount of urine, even a small amount of urine leakage can be detected with high sensitivity.

It is a top view which shows roughly the external appearance of one Embodiment of the urine leak sensor of this invention. It is a perspective view which shows typically the laminated structure of the water battery in the urine leak sensor of FIG. It is a perspective view which shows in detail the specific structure of the urine leak sensor of FIG. 1 according to a manufacturing process. It is a figure which shows roughly the example of 1 structure of the urine leak detection system using the urine leak sensor of FIG. It is a figure which shows roughly the other structural example of the urine leak detection system using the urine leak sensor of FIG. It is a characteristic view showing the relationship between the electrode area in a water battery, a voltage, and an electric current. It is a characteristic view showing the relationship between the number of electrodes and the voltage and current in a water battery. It is the characteristic figure which measured the relationship of the initial voltage with respect to salt containing density | concentration at the time of using 1 layer woven cotton cloth, 2 layer woven cotton cloth, and 3 layer woven cotton cloth as an Example of the water battery of the urine leak sensor of this invention. It is the characteristic view which measured the relationship of the initial current with respect to salt containing density | concentration at the time of using the 1 layer woven cotton cloth, the 2 layer woven cotton cloth, and the 3 layer woven cotton cloth as an Example of the water battery of the urine leak sensor of this invention. As an example of the water battery of the urine leakage sensor of the present invention, the characteristics of measuring the relationship of the voltage with respect to the standing time when the salt content is 10% using a 1 layer woven cotton fabric, a 2 layer woven cotton fabric and a 3 layer woven cotton fabric. FIG. As an example of the water battery of the urine leakage sensor of the present invention, the characteristics of measuring the relationship of the voltage with respect to the standing time when the salt content is 20% using a 1 layer woven cotton fabric, a 2 layer woven cotton fabric and a 3 layer woven cotton fabric. FIG. As an example of the water battery of the urine leakage sensor of the present invention, the characteristics of measuring the relationship of the current with respect to the standing time when the salt content is 10% using a 1 layer woven cotton fabric, a 2 layer woven cotton fabric and a 3 layer woven cotton fabric. FIG. As an example of the water battery of the urine leakage sensor of the present invention, the characteristics of measuring the relationship of the current with respect to the standing time when the salt content is 20% using a 1 layer woven cotton fabric, a 2 layer woven cotton fabric and a 3 layer woven cotton fabric FIG. It is the characteristic view which measured the relationship of the voltage with respect to the rise time at the time of using salt containing cotton cloth and salt non-containing cotton cloth. It is the characteristic view which measured the relationship of the electric current with respect to the rise time at the time of using a salt containing cotton cloth and a salt non-containing cotton cloth. It is the characteristic view which measured the relationship of the voltage with respect to the leaving time at the time of using salt containing cotton cloth and salt non-containing cotton cloth. It is the characteristic view which measured the relationship of the electric current with respect to the leaving time at the time of using salt containing cotton cloth and salt non-containing cotton cloth. It is the characteristic view which measured the relationship of the initial voltage with respect to the salt containing density | concentration at the time of using the Example of the water battery of the urine leak sensor of this invention, and a commercially available carbonization cloth. It is the characteristic view which measured the relationship of the initial current with respect to the salt containing density | concentration at the time of using the Example of the water battery of the urine leak sensor of this invention, and the commercially available carbonization cloth. It is the characteristic view which measured the relationship of the voltage with respect to the leaving time in the case of the Example of the water battery of the urine leak sensor of this invention, and the commercially available carbonization cloth, and a salt containing density | concentration is 10%. It is the characteristic view which measured the relationship of the voltage with respect to the leaving time in case the salt containing density | concentration is 20% using the Example of the water battery of the urine leak sensor of this invention, and a commercially available carbonization cloth. It is the characteristic view which measured the relationship of the electric current with respect to the leaving time in the case of the Example of the water battery of the urine leak sensor of this invention, and the commercially available carbonization cloth, and a salt containing density | concentration is 10%. It is the characteristic view which measured the relationship of the electric current with respect to the leaving time in case the salt containing density | concentration is 20% using the Example of the water battery of the urine leak sensor of this invention, and a commercially available carbonization cloth.

  FIG. 1 schematically shows the external appearance of one embodiment of the urine leakage sensor of the present invention, FIG. 2 schematically shows a laminated structure of water batteries in the urine leakage sensor of this embodiment, and FIG. The specific structure of the urine leak sensor of this embodiment is shown in detail for each manufacturing process. 3A to 3G respectively show the structure on the central part side and the structure on the outer peripheral part side.

  In FIG. 1, 10 is a urine leak sensor, 11 is a water-absorbing exterior material that encloses the water battery, 11a is a sewing thread that closes the exterior material 11, 12 is a positive lead wire of the water battery, and 13 is a water battery. Each negative lead is shown.

  As shown in FIG. 2, the water battery typically includes a positive electrode lead electrode 15, a carbonized layer 17 constituting the positive electrode, electrolyte-containing layers 18 and 19 made of a sheet material, and a negative electrode 20 in this order. It has a laminated structure that is sequentially laminated.

  Hereinafter, the specific structure of the urine leak sensor 10 according to the present embodiment will be described in detail with reference to FIG.

  As shown in FIG. 3A, a positive electrode extraction electrode 15 is fixed to the positive electrode support plate 14 located at the center of the laminated structure. The positive electrode support plate 14 is a flat plate made of a plastic insulating material such as PVC. In addition, although the positive electrode support plate 14 is a circular flat plate in the drawing, other shapes such as a rectangular flat plate may be used.

  The positive electrode extraction electrode 15 is a flat plate made of a conductive metal material such as copper, and is folded and bonded to both surfaces of the positive electrode support plate 14 in this embodiment. Of course, the positive electrode lead electrode 15 may be fixed to only one surface of the positive electrode support plate 14. As shown in FIG. 3A, one end of the positive electrode lead wire 12 is electrically connected to the positive electrode lead electrode 14 by solder 16.

  As shown in FIG. 3B, a carbonized layer 17 constituting the positive electrode is closely adhered and laminated around the positive electrode extraction electrode 15 fixed to the positive electrode support plate 14. More specifically, the carbonized sheet material constituting the carbonized layer 17 is closely attached to the positive electrode support plate 14 and the positive electrode extraction electrode 15 and wound around the lateral direction (left and right direction in the drawing). The carbonized sheet material used in the present embodiment is a woven fabric, a knitted fabric, a woven or knitted fabric or a nonwoven fabric made of cellulosic fiber yarns, and a woven fabric, a knitted fabric formed by heating carbonization thereof, A woven or knitted fabric or non-woven fabric, provided by Shin Nippon Tex Co., Ltd. This carbonized sheet material is not woven from rigid carbon fiber, but the cellulose fiber yarn itself, which is the starting material before carbonization firing, has a soft and free direction, so the fiber is only in the surface direction. It has a very good electrical conductivity, dielectric properties, thermal conductivity and compressive strength not only in the plane direction but also in the thickness direction because it is sufficiently blended in the thickness direction. .

  Electrolyte containing layers 18 and 19 are laminated in close contact with the carbonized layer 17 constituting the positive electrode. More specifically, as shown in FIG. 3C, the electrolyte-containing sheet material constituting the electrolyte-containing layer 18 is in close contact with the carbonized layer 17 and wound around the lateral direction (left and right in the figure). Further, as shown in FIG. 3D, the electrolyte-containing sheet material constituting the electrolyte-containing layer 19 is in close contact with the electrolyte-containing layer 18 and is folded around the vertical direction (vertical direction in the figure). It is superimposed. In the present embodiment, the electrolyte-containing sheet materials 18 and 19 are formed by impregnating a degreased water-absorbing paper with an electrolytic solution (for example, a saline solution to which saline or glucogen is added) and drying the wet absorbent paper. Then, the electrolyte (for example, sodium chloride (sodium chloride)) is eluted and functions as an electrolyte medium. As described in Examples, the electrolyte-containing sheet materials 18 and 19 preferably contain 5% or more of sodium chloride as an electrolyte. Moreover, as the electrolyte-containing sheet materials 18 and 19, as described later, one sheet may be composed of two or more layers of woven cotton cloth containing salt (sodium chloride). Further, as the electrolyte-containing sheet materials 18 and 19, a sheet material made of a woven fabric, a knitted fabric, a woven / knitted fabric, a nonwoven fabric or paper having water absorption containing an electrolyte by impregnating the electrolyte solution and drying it may be used. good.

  As shown in FIG. 3 (E), a flat metal plate made of a magnesium alloy material constituting the negative electrode 20 is laminated in close contact with the outer electrolyte-containing layer 19.

  As the metal plate constituting the negative electrode 20, various materials such as aluminum and lithium can be applied in addition to the magnesium alloy as long as the material has a higher ionization tendency than the carbonized layer 17 that is the positive electrode. Furthermore, two metal plates may be adhered and laminated on both surfaces of the electrolyte-containing layer 19. In addition, although the metal plate which comprises the negative electrode 20 is a circular flat plate in the figure, other shapes, for example, a rectangular flat plate, may be sufficient.

  A negative electrode lead electrode 21 is attached to the negative electrode 20. In the present embodiment, as the negative electrode extraction electrode 21, for example, a rivet made of a conductive material such as copper is inserted through a metal plate that is the negative electrode 20 and fixed. As shown in FIG. 3E, one end of the negative electrode lead wire 13 is electrically connected to the negative electrode lead electrode 21 by soldering.

  As shown in FIG. 3 (F), the above-described laminate in which the positive electrode support plate 14, the positive electrode extraction electrode 15, the carbonized layer 17, the electrolyte-containing layers 18 and 19, and the negative electrode 20 are laminated together is a fixing material. The tape 22 is wound and fixed in a lateral direction (left and right in the figure). Thus, for example, the positive electrode support plate 14, the positive electrode lead electrode 15, the carbonized layer 17, the electrolyte-containing layers 18 and 19, and the negative electrode 20 are obtained by being crimped and fixed by winding a tape 22 that is a vinyl tape, for example. They are stuck together and fixed. In addition, since the positive electrode 15 and the carbonized layer 17 can be electrically connected, and this connection can be reliably performed only by winding the tape 22, the work process becomes very easy and the manufacturing cost is also increased. It will be cheap.

  As shown in FIG. 3G, the water battery fixed in this way is inserted into the folded back sheet material for the exterior material 11 having water absorption, and is closed by the sewing thread 11a. In a state where the wire 12 and the negative lead wire 13 are inserted to the outside, the wire 12 and the negative lead wire 13 are covered with the exterior material 11 and accommodated inside, that is, encapsulated. The exterior material 11 is composed of a sheet material made of woven fabric, knitted fabric, woven / knitted fabric, nonwoven fabric or paper having water absorption.

  As described above, according to the urine leakage sensor 10 of the present embodiment, since no reaction occurs unless urine is absorbed, it can be stored for a long period of time. Urine leaks and urine travels through the water-absorbing exterior material 11 to wet the electrolyte-containing layers 18 and 19, and the electrolyte, for example, sodium chloride (sodium chloride) contained in the electrolyte-containing layers 18 and 19 is contained in the liquid. The electrolyte-containing layers 18 and 19 function as an electrolyte medium between the carbonized layer 17 as the positive electrode and the negative electrode 20 made of magnesium alloy. As a result, a discharge reaction due to hydrogen ions occurs around the negative electrode 20, while electrons do not react with the hydrogen ions in the carbonized layer 17, and electrons pass from the negative electrode 20 through the electrolyte-containing layers 18 and 19 to the carbonized layer 17 that is the positive electrode. An electromotive force is generated when trying to move. This electromotive force is taken out by the positive lead wire 12 and the negative lead wire 13 via the positive electrode lead electrode 15. As described above, the electrolyte-containing layers 18 and 19 are provided in close contact with the carbonized layer 17, and the negative electrode 20 made of a magnesium alloy having a high ionization tendency is provided in close contact with the electrolyte-containing layer 19. Since it is accommodated in the exterior material 11 which has, only a small amount of urine contacts the exterior material 11, it operates as a water battery and an electromotive force is generated. In addition, if the electrolyte-containing layers 18 and 19 are made of a multi-layer woven cotton cloth having one or more layers and containing salt, very high initial voltage and initial current can be obtained. Further, as in this embodiment, by using a special carbonized cloth as the carbonized layer 17, both the initial voltage and the initial current can be significantly increased.

  Since such a water battery is used to detect urine leakage, it is not necessary to always apply a voltage, which is very safe. In addition, a power supply device is not required to operate the urine leak sensor 10, and the configuration becomes very simple and can be manufactured at low cost. Furthermore, since it operates only by penetrating a small amount of urine, even a small amount of urine leakage can be detected with high sensitivity.

  FIG. 4 schematically shows a configuration example of a urine leak detection system using the urine leak sensor 10 in the present embodiment.

  As shown in the figure, the urine leak sensor 10 is inserted between the diaper cover 40 and the urine collecting pad 41. The positive lead wire 12 and the negative lead wire 13 from the urine leak sensor 10 are connected to the urine leak notification means 42. The urine leak notification means 42 is, for example, an optical display means composed of an LED (light emitting diode) element or other light source that outputs light by an electromotive voltage from the urine leak sensor 10, or an electromotive voltage from the urine leak sensor 10. It is a vibration generator or buzzer that operates and outputs sound.

  According to such a configuration, the urine leakage sensor 10 is mainly composed of a water battery, and the urine leakage notification means 42 is operated by the electromotive voltage. Therefore, the power supply device is unnecessary and the configuration is very simple. And can be manufactured at low cost. Further, it is not necessary to always apply a voltage to the urine leak sensor 10 itself, which is very safe. In addition, since the water battery operates only when a small amount of urine permeates, even a small amount of urine leakage can be detected with high sensitivity.

  The urine leak notification means 42 may be a nurse (caregiver) call system in a hospital or a care facility, and the nurse call may be performed by this system. In the example of FIG. 4, the urine leakage sensor 10 is inserted between the diaper cover 40 and the urine collecting pad 41. However, the urine leakage sensor 10 may be disposed in other portions as long as the leaked urine can be detected. good. Moreover, you may arrange | position to the position which can detect the leaked urine in the underpants which have the function corresponding to not only the combination of a diaper cover and a urine pad but various types of diapers or diapers.

  FIG. 5 schematically shows another configuration example of the urine leak detection system using the urine leak sensor 10 in the present embodiment.

  As shown in the figure, the urine leak sensor 10 is inserted between the diaper cover 40 and the urine collecting pad 41. The positive lead wire 12 and the negative lead wire 13 from the urine leak sensor 10 are connected to the transmitter 43. The transmitter 43 is configured to transmit a radio signal for notifying the occurrence of urine leak when an electromotive voltage is applied from the urine leak sensor 10, and the transmitted radio signal is received by the receiver 44, and the urine leak is detected. A urine leak occurrence signal is sent to the leak notification means 45. The urine leak notification means 45 is an optical display means comprising an LED (light emitting diode) element or other light source that outputs light when the urine leak occurrence signal is received, or when the urine leak occurrence signal is received. It is a vibration generator or buzzer that operates and outputs sound.

  The urine leak notification means 45 is a nurse (caregiver) call system in a hospital or a care facility, and this system may be configured to make a nurse call. In the example of FIG. 5, the urine leakage sensor 10 is inserted between the diaper cover 40 and the urine collection pad 41, but may be disposed in other portions as long as the leaked urine can be detected. good. Moreover, you may arrange | position not only in the combination of a diaper cover and a urine picking pad but in the position which can detect the leaked urine in the underpants which have a function corresponding to various types of diapers or diapers.

  According to such a configuration, urine leakage can be monitored from a remote location. Further, it is not necessary to always apply a voltage to the urine leak sensor 10 itself, which is very safe. In addition, since the water battery operates only when a small amount of urine permeates, even a small amount of urine leakage can be detected with high sensitivity.

  FIG. 6 shows the relationship between the electrode area, voltage, and current in the water battery of the urine leak sensor 10 having the above-described configuration, and FIG. 7 shows the number, voltage, and current of the extraction electrodes attached to, for example, the negative electrode in the water battery. Represents the relationship. As shown in FIG. 6, even if the area of the electrode is changed, the voltage characteristic and the current characteristic are not changed. However, when the number of extraction electrodes attached to the negative electrode or the positive electrode is changed, the current characteristic is greatly changed.

  Hereinafter, embodiments of the water battery of the urine leakage sensor 10 of the present invention will be described. In these examples, a case where the electrolyte-containing layer is composed of a sheet in which salt (sodium chloride) is contained in a multi-layer woven cotton cloth having two or more layers will be described. With such a configuration, very good voltage and current characteristics can be obtained.

  First, the initial voltage and current characteristics of a plurality of samples in which the electrolyte-containing layer was composed of a one-layer woven cotton cloth, a two-layer woven cotton cloth, and a three-layer woven cotton cloth, and the time course characteristics thereof were measured. Furthermore, the voltage and current characteristics with respect to the salt-containing concentration of a plurality of samples in which the electrolyte-containing layer was composed of one-layer woven cotton cloth, two-layer woven cotton cloth, and three-layer woven cotton cloth were measured. The actually measured voltage and current values are the terminal voltage and terminal current values of the sample. As is well known, this terminal voltage corresponds to a value obtained by adding an electromotive voltage and a voltage drop due to an internal resistance.

  The configuration of each sample is basically the same as the configuration of the water battery described above. That is, as the positive electrode, a woven fabric, a knitted fabric, a woven fabric, or a nonwoven fabric made of cellulosic fibers provided by Shin Nippon Tex Co., Ltd. is used as a raw material fiber body, and this is a woven fabric, a knitted fabric obtained by heating carbonization. A carbonized sheet material of cloth, woven / knitted cloth or non-woven cloth was used. The dimension of the positive electrode is 20 mm × 50 mm. As the negative electrode 20, a flat metal plate made of a magnesium alloy material was used. The negative electrode has a size of 20 mm × 50 mm. As the electrolyte-containing layer, a one-layer weave, two-layer weave and three-layer weave cotton cloth were used. Each cotton cloth is used by being saturated with saturated saline.

  8 to 13 show the measurement results. FIG. 8 shows the relationship between the initial voltage and the salt-containing concentration, FIG. 9 shows the relationship between the initial current and the salt-containing concentration, and FIG. 10 shows the case where the salt-containing concentration is 10%. FIG. 11 shows the relationship between the voltage with respect to the standing time when the salt-containing concentration is 20%, FIG. 12 shows the relationship with the current with respect to the standing time when the salt-containing concentration is 10%, and FIG. The relationship of the electric current with respect to the leaving time when the concentration is 20% is shown.

  As can be seen from FIGS. 8 and 9, the initial voltage and the initial current are both higher when the two-layer woven cotton cloth is used than when the one-layer woven cotton cloth is used as the cotton cloth constituting the salt-containing cloth corresponding to the electrolyte-containing layer. Significantly higher and even higher when using a 3 layer woven cotton fabric. Moreover, as can be seen from FIGS. 10 to 13, as the cotton cloth constituting the salt-containing cloth corresponding to the electrolyte-containing layer, the voltage after time elapses when the two-layer woven cotton cloth is used rather than the one-layer woven cotton cloth. The decrease in current is small, and even further when using a three-layer woven cotton cloth. Therefore, the use of the two-layer woven cotton cloth provides better electrical characteristics than the use of the one-layer woven cotton cloth, and the use of the three-layer woven cotton cloth provides further excellent electrical characteristics. In other words, it is desirable to use a multi-layer woven cotton cloth as the cotton cloth constituting the salt-containing cloth corresponding to the electrolyte-containing layer. By using a multi-layer woven cotton cloth, it is presumed that the electrical characteristics are improved because more salt components are contained in each layer.

  Further, as can be seen from FIGS. 8 and 9, in the salt-containing cloth corresponding to the electrolyte-containing layer using the multi-layer woven cotton cloth, a sufficiently large initial voltage and initial current can be obtained if the salt-containing concentration is 5% or more. It has been. In this measurement example, measurement was performed only up to the case where the salt-containing concentration was 25%. However, since the initial voltage saturates when the salt-containing concentration is 15% or more, good characteristics are obtained even if it exceeds 25%. It can be inferred that it will be obtained. In addition, since the initial current increases as the salt-containing concentration increases, it can be expected that good characteristics can be obtained even if it exceeds 25%. Furthermore, as can be seen from FIG. 10 to FIG. 13, in the salt-containing cloth corresponding to the electrolyte-containing layer using the multi-layer woven cotton cloth, the salt-containing concentration is 20% more than the case where the salt-containing concentration is 10%. Voltage and current characteristics are obtained. Therefore, in the salt-containing cloth corresponding to the electrolyte-containing layer using the multi-layer woven cotton cloth, it is understood that good voltage and current characteristics can be obtained if the salt-containing concentration is 5% or more.

  Furthermore, the rising voltage and current characteristics of a sample in which salt was contained in a cotton cloth constituting the salt-containing cloth corresponding to the electrolyte-containing layer and a sample in which no salt was contained, and the time course characteristics thereof were measured. The actually measured voltage and current values are the terminal voltage and terminal current values of the sample.

  The configuration of each sample is basically the same as the configuration of the water battery described above. That is, as the positive electrode, a woven fabric, a knitted fabric, a woven fabric, or a nonwoven fabric made of cellulosic fibers provided by Shin Nippon Tex Co., Ltd. is used as a raw material fiber body, and this is a woven fabric, knitted fabric obtained by heating carbonization. A carbonized sheet material of cloth, woven / knitted cloth or non-woven cloth was used. The dimension of the positive electrode is 20 mm × 50 mm. A flat metal plate made of a magnesium alloy material was used as the negative electrode. The dimension of the negative electrode is 20 mm × 50 mm. As the electrolyte-containing layer, a two-layered absorbent cotton cloth was used. A sample in which salt is contained in a cotton cloth is used by injecting 3 cc of 20% saline, and a sample in which no salt is contained in the cotton cloth is used by injecting 3 cc of tap water.

  14 to 17 show the measurement results. FIG. 14 shows the relationship between the voltage with respect to the rise time, FIG. 15 shows the relationship with the current with respect to the rise time, FIG. 16 shows the relationship with the voltage with respect to the standing time, and FIG. The relationship of the current with respect to is shown respectively.

  As can be seen from FIG. 14 and FIG. 15, as the cotton cloth corresponding to the electrolyte-containing layer, by using a cotton cloth containing salt like a salt-containing cloth, the voltage and current are higher than when using a cotton cloth not containing salt. The rise is much faster. Further, as can be seen from FIG. 16 and FIG. 17, by using a cotton cloth containing salt as a cotton cloth corresponding to the electrolyte-containing layer, a decrease in voltage and current after elapse of time compared to the case of using a cotton cloth not containing salt. Are both smaller. Therefore, superior electrical characteristics can be obtained using salt-containing cotton cloth rather than using salt-free cotton cloth.

  Further, in this example, as a carbonized sheet material, a woven fabric, a knitted fabric, a woven or knitted fabric or a non-woven fabric made of cellulosic fibers provided by Shin Nippon Tex Co., Ltd. is used as a raw fiber body, and this is heated carbon. Since a woven fabric, a knitted fabric, a woven / knitted fabric or a non-woven fabric is used, very good voltage and current characteristics can be obtained. This point will be described in detail below.

  Measure the initial voltage and current characteristics of a plurality of samples composed of the carbonized sheet material of the present invention with the special carbonized sheet material of the present invention, and general carbonized cloths A and B that are commercially available, and the time course characteristics thereof. did. Furthermore, the voltage and electric current characteristic with respect to the salt containing density | concentration of the some sample which comprised the carbonized sheet material by the special carbonized sheet material of this invention and the general carbonized cloth A and B marketed were measured. The actually measured voltage and current values are the terminal voltage and terminal current values of the sample.

  The configuration of each sample is basically the same as the configuration of the water battery described above. That is, as the positive electrode, a woven fabric, a knitted fabric, a woven fabric, or a nonwoven fabric made of cellulosic fibers provided by Shin Nippon Tex Co., Ltd. is used as a raw material fiber body, and this is a woven fabric, knitted fabric obtained by heating carbonization. A carbonized sheet material of cloth, woven / knitted cloth or non-woven cloth was used. The dimension of the positive electrode is 20 mm × 50 mm. A flat metal plate made of a magnesium alloy material was used as the negative electrode. The dimension of the negative electrode is 20 mm × 50 mm. As the electrolyte-containing layer, a two-layered absorbent cotton cloth is used, which is impregnated with saturated saline.

  18 to 23 show the measurement results. FIG. 18 shows the relationship between the initial voltage and the salt-containing concentration, FIG. 19 shows the relationship between the salt-containing concentration and the initial current, and FIG. 20 shows the case where the salt-containing concentration is 10%. FIG. 21 shows the relationship between the voltage with respect to the standing time when the salt-containing concentration is 20%, FIG. 22 shows the relationship with the current with respect to the standing time when the salt-containing concentration is 10%, and FIG. The relationship of the electric current with respect to the leaving time when the concentration is 20% is shown.

  As can be seen from FIGS. 18 and 19, by using the special carbonized sheet material of the present invention rather than using commercially available general carbonized cloths A and B as the carbonized sheet material, the initial voltage and Both initial currents are significantly higher. Further, as can be seen from FIGS. 20 to 23, as the carbonized sheet material, the time required by using the special carbonized sheet material of the present invention rather than using the general carbonized cloths A and B that are commercially available. Both the decrease in voltage and current after the lapse are small. Therefore, by using the special carbonized sheet material of the present invention, very excellent electrical characteristics can be obtained.

  The above-described embodiments are all illustrative of the present invention and are not limited, and the present invention can be implemented in various other modifications and changes. Therefore, the scope of the present invention is defined only by the scope of the utility model registration request and its equivalent scope.

DESCRIPTION OF SYMBOLS 10 Urine leak sensor 11 Exterior material 11a Sewing thread 12 Positive lead wire 13 Negative lead wire 14 Positive electrode support plate 15 Positive electrode lead electrode 16 Solder 17 Carbonized layer 18, 19 Electrolyte containing layer 20 Negative electrode 21 Negative electrode lead electrode 22 Tape 40 Diaper cover 41 Urine removal pad 42, 45 Urine leak notification means 43 Transmitter 44 Receiver

Claims (9)

  A urine leakage sensor used by being disposed in the vicinity of a diaper, a positive electrode, a positive lead wire electrically connected to the positive electrode, a negative electrode formed of a metal material having a higher ionization tendency than the positive electrode, A negative lead wire electrically connected to the negative electrode; an electrolyte-containing layer which is inserted in close contact between the positive electrode and the negative electrode and contains an electrolyte; and the water-absorbing electrolyte; and the positive electrode and the electrolyte-containing layer And a urine leakage sensor comprising a water battery including the negative electrode and an exterior material having water absorption.   The positive electrode includes a carbonized layer and a positive electrode lead electrode electrically connected to the carbonized layer, the positive lead wire is electrically connected to the positive electrode lead electrode, and the electrolyte-containing layer includes The carbonized layer is provided in close contact with the negative electrode, and the negative electrode is formed of a magnesium alloy having a higher ionization tendency than the positive electrode, and the carbonized layer, the positive electrode extraction electrode, the electrolyte-containing layer, and the The urine leakage sensor according to claim 1, further comprising a fixing member that fixes the negative electrodes by pressure bonding to each other.   Carbonized sheet of woven fabric, knitted fabric, woven or knitted fabric or nonwoven fabric, wherein the carbonized layer is carbonized by heating carbon fiber raw material made of woven fabric, knitted fabric, woven or knitted fabric or nonwoven fabric made of cellulosic fiber yarns The urine leak sensor according to claim 2, wherein the urine leak sensor is a material.   The urine leakage sensor according to any one of claims 1 to 3, wherein the electrolyte-containing layer is a sheet material containing 5% or more of sodium chloride as an electrolyte.   The electrolyte-containing layer is a sheet material made of a woven fabric, a knitted fabric, a woven / knitted fabric, a non-woven fabric, or paper having water absorption containing an electrolyte by being impregnated with an electrolytic solution and dried. 5. The urine leak sensor according to any one of items 1 to 4.   6. The apparatus according to claim 1, further comprising a positive electrode support plate for supporting the positive electrode lead electrode, wherein the carbonized layer is provided in close contact with the positive electrode lead electrode and the positive electrode support plate. The urine leak sensor according to any one of the above.   The urine leak sensor according to any one of claims 1 to 6, wherein the exterior material is a sheet material made of woven fabric, knitted fabric, woven / knitted fabric, nonwoven fabric or paper having water absorption.   A urine leakage sensor according to any one of claims 1 to 7, and urine leakage notification means for notifying that urine leakage has occurred when an electromotive voltage is output from the urine leakage sensor. Urine leak detection system.   The urine leakage sensor according to any one of claims 1 to 7, a transmitter that transmits a radio signal that notifies the occurrence of urine leakage when an electromotive voltage is output from the urine leakage sensor, and the transmitted A urine comprising: a receiver that receives a radio signal and outputs a urine leak occurrence signal; and urine leak notification means for notifying that a urine leak has occurred when the urine leak occurrence signal is output from the receiver. Leak detection system.

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