JP2023084712A - Liquid leakage detection device - Google Patents

Abstract

To provide a liquid leakage detection device that allows selection of a detection unit according to a location desired to detect.SOLUTION: A liquid leakage detection device 100 includes: connection terminal portions 105a for connecting a linear liquid leakage detection unit 101 having linear electrode portions 101a and 101b which are a pair of linear electrodes; a point-like liquid leakage detection unit 103 having point-like electrode portions 103a and 103b which are a pair of point-like electrodes connected to the connection terminal portions 105a; a liquid leakage determination unit 105b that determines occurrence of liquid leakage using a voltage between the connection terminal portions 105a; and a communication unit 109 that transmits liquid leakage occurrence information when the liquid leakage determination unit 105b determines that liquid leakage has occurred.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to liquid leakage detection devices, and more particularly to devices that can be easily installed.

A conventional liquid leakage detection device will be described using a water immersion/water leakage detection device shown in FIG. The water ingress/leak detection device shown in FIG. a detection line, a terminating resistor connected between the two conductors as necessary at the end thereof, an AC or DC power source connected between the two conductors at the starting end via a resistor, and when the power source is AC An abnormality detection circuit is provided that is connected to the start end via a rectification circuit, or without a rectification circuit in the case of direct current, and when the input of the abnormality detection circuit deviates from the range of the predetermined upper and lower reference voltages, It is characterized by comprising a disconnection indication relay circuit and a water ingress/leakage indication relay circuit which are respectively actuated by the output of this circuit (see Patent Document 1 as described above).

Japanese Utility Model Laid-Open No. 57-97265

The above-mentioned inundation/leak detection device has the following points to be improved. In the above-described water inundation/leakage detection device, water inundation/leakage is detected by a water leakage sensor using a detection line having a relatively long length, that is, a linear detection line. A water leak cannot be detected by a sensor having a point-like electrode, such as a spot water leak sensor. In other words, there is a point to be improved in that a sensor suitable for the location to be detected cannot be selected.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a liquid leakage detection device in which a detection portion can be selected according to a location to be detected.

Means for solving the problems in the present invention and effects of the invention are shown below.

A liquid leakage detection device according to the present invention comprises: a connection terminal section for connecting a linear liquid leakage detection section having a linear electrode section which is a pair of linear electrodes; a point-like liquid leakage detection unit having a point-like electrode portion that is an electrode; a liquid leakage determination unit that determines occurrence of liquid leakage using a voltage between the connection terminal portions; and liquid leakage occurs in the liquid leakage determination unit. a communication unit that transmits leakage occurrence information when it is determined that the leakage occurs.

Accordingly, liquid leakage can be detected by selecting the point-like liquid leakage detection unit and/or the linear liquid leakage detection unit as necessary.

In the liquid leakage detection device according to the present invention, the liquid leakage judging section compares a predetermined reference voltage between the connection terminals with a measured voltage between the connection terminals to detect the occurrence of liquid leakage. characterized by determining

Accordingly, with a simple configuration, liquid leakage can be detected simultaneously using the point-like liquid leakage detection section and/or using the linear liquid leakage detection section.

In the liquid leakage detection device according to the present invention, when the linear liquid leakage detection section is connected to the connection terminal section, a disconnection in the linear liquid leakage detection section is detected using the voltage between the connection terminal sections. and a disconnection determination unit that determines the occurrence of

This makes it possible to determine whether or not a wire breakage has occurred in the linear liquid leakage detection unit when the linear liquid leakage detection unit is used.

In the liquid leakage detection device according to the present invention, the disconnection determination section has a predetermined reference voltage between the connection terminal section and the connection terminal when the linear liquid leakage detection section is connected to the connection terminal section. It is characterized by judging the occurrence of disconnection in the linear liquid leakage detection part by comparing the measured voltage between the parts.

With this, it is possible to determine the occurrence of disconnection in the linear liquid leakage detection section when using the linear liquid leakage detection section with a simple configuration.

In the liquid leakage detection device according to the present invention, a housing section that houses at least the liquid leakage determination section includes a housing in which the point-like electrodes of the point-like liquid leakage detection section are arranged along the rear surface. and the casing part has a slit part for taking in leaked liquid from the outside to the point-like electrode.

This makes it possible to determine the occurrence of liquid leakage even when the point-like liquid leakage detector is arranged on the back surface of the housing.

In the liquid leakage detection device according to the present invention, the housing section includes an operation section for instructing the operation of the liquid leakage determination section and/or the disconnection determination section, the liquid leakage determination section, and/or the disconnection determination section. and a display unit for displaying the determination by the determination unit.

This makes it possible to easily control the operations of the liquid leakage determination unit and the disconnection determination unit using the operation unit. In addition, the judgments of the liquid leakage judging section and the disconnection judging section can be confirmed only by confirming the display section.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the liquid leakage detection apparatus 100 which is one Example of the liquid leakage detection apparatus which concerns on this invention. 3 is a diagram showing the configuration of a control unit 105 of the liquid leakage detection device 100; FIG. FIG. 2 is a diagram showing the configuration of a casing 111 of the liquid leakage detection device 100, where A shows the state viewed from the front side, and B shows the state viewed from the rear side. 4A and 4B are diagrams showing how to use the liquid leakage detection device 100. FIG. 4A and 4B are diagrams showing how to use the liquid leakage detection device 100. FIG. It is a figure which shows the conventional liquid leakage detection apparatus.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

A water leakage detection device according to the present invention will be described by taking a liquid leakage detection device 100 as an example. The liquid leakage detection device 100 is a device that detects leakage of a predetermined liquid, such as water, in a predetermined area.

First Configuration of Liquid Leakage Detection Device 100 An outline of the liquid leakage detection device 100 is shown in FIG. The liquid leakage detection device 100 has a linear liquid leakage detection section 101 , a point liquid leakage detection section 103 , a control section 105 , a communication section 107 and a power supply section 109 .

The linear liquid leakage detection section 101 has two linear electrode sections 101a, 101b, a terminating resistance section 101c, and a connection end section 101d. The linear electrode portions 101a have a predetermined length and are arranged in parallel at predetermined intervals. The linear electrode portion 101a is made of a predetermined metal such as stainless steel. The linear electrode portion 101b is the same as the linear electrode portion 101a. The linear electrode portion 101a and the linear electrode portion 101b are integrated by an insulating member. Further, the linear electrode portion 101a and the linear electrode portion 101b are partially exposed to the insulating member and are configured to come into contact with the liquid when leakage occurs.

The terminating resistance portion 101c is arranged at one end of each of the linear electrode portions 101a and 101b so as to connect the linear resistance member 101a and the linear electrode portion 101b. That is, the linear electrode portion 101a and the linear electrode portion 101b are connected to each other via the terminating resistance portion 101c. Note that the terminating resistance portion 101c is set to have a resistance value equivalent to the resistance value connected between the connection terminal portions 105a in the liquid leakage determination portion 105b (described later) of the control portion 105. FIG.

The connection end portion 101d is arranged at an end portion different from the end portions connected to the linear electrode portion 101a, the linear electrode portion 101b, and the respective terminal resistor portions 101c. If necessary, the connection end portion 101d is connected to a connection terminal portion 105a (described later) of the control section 105, and the linear liquid leakage detection section 101 is used to detect the occurrence of liquid leakage.

The point-like liquid leakage detecting portion 103 has a point-like electrode portion 103a, a point-like electrode portion 103b, and a connecting end portion 103c. The dotted electrode portion 103 a has a length shorter than that of the linear electrode portion 101 a of the linear leakage detection portion 101 . The dotted electrode portion 103a is made of a predetermined metal such as stainless steel. The dotted electrode portion 103b is the same as the dotted electrode portion 103a.

The connection end portion 103c is arranged at one end of each of the point-like electrode portions 103a and 103b. By connecting the connection end portion 103c to a connection terminal portion 105a (described later) of the control portion 105, the punctate liquid leakage detection portion 103 can be used to detect the occurrence of liquid leakage.

Note that the punctate liquid leakage detection unit 103 is always connected to a connection terminal unit 105a (described later) of the control unit 105 .

The control section 105 has a connection terminal section 105a, a liquid leakage determination section 105b, and a disconnection determination section 105c. The connection terminal portion 105 a is connected to the connection end portion 101 d of the linear liquid leakage detection portion 101 and/or the connection end portion 103 c of the point-like liquid leakage detection portion 103 . By connecting the connection end portion 101d of the linear liquid leakage detection portion 101 and/or the connection end portion 103c of the point-like liquid leakage detection portion 103 to the connection terminal portion 105a, the linear liquid leakage detection portion 101 and/or Alternatively, the punctate liquid leakage detection unit 103 is used to detect the occurrence of liquid leakage.

The liquid leakage determination unit 105b uses the voltage between the connection ends 101d of the linear liquid leakage detection unit 101 and/or between the connection ends 103c of the point-like liquid leakage detection unit 103 to detect the occurrence of liquid leakage. determine whether or not The liquid leakage determination unit 105b determines that liquid leakage has occurred when the voltage between the connection terminals 105a becomes lower than the predetermined reference voltage _VTH1 . That is, the liquid leakage determination unit 105b determines the occurrence of liquid leakage by detecting the voltage between the connection end 101d of the linear liquid leakage detection unit 101 and/or the connection end 103c of the point-like liquid leakage detection unit 103. Judge using In this way, the occurrence of liquid leakage can be determined using the voltage between the connection end 101d of the linear liquid leakage detection unit 101 and/or the connection end 103c of the point-like liquid leakage detection unit 103. Therefore, leakage can be detected with a simple configuration.

The disconnection determination unit 105c uses the voltage between the connection ends 101d of the linear liquid leakage detection unit 101 and/or the voltage between the connection ends 103c of the point-like liquid leakage detection unit 103 to detect the liquid leakage. Determine if there is a disconnection in the electrical circuit of the The disconnection determination unit 105c determines that a disconnection has occurred when the voltage between the connection terminal units 105a becomes higher than a predetermined reference voltage _VTH2 . That is, the disconnection determination unit 105c detects the occurrence of disconnection using the voltage between the connection end 101d of the linear liquid leakage detection unit 101 and/or the connection end 103c of the point-like liquid leakage detection unit 103. to judge. In this way, by determining the occurrence of disconnection using the voltage between the connection end 101d of the linear liquid leakage detection unit 101 and/or the connection end 103c of the point-like liquid leakage detection unit 103, , the occurrence of wire breakage and the occurrence of liquid leakage can be detected at the same time with a simple configuration.

Communication unit 107 is connected to control unit 105 . The communication unit 107 connects to a predetermined network such as a wireless LAN network, communicates with a predetermined communication device, and wirelessly transmits various types of information such as leakage occurrence information.

The power supply unit 109 has a predetermined power source, and supplies power obtained from the power source to each component such as the control unit 105 and the communication unit 107 . The power supply unit 109 uses, for example, a button battery as a power source.

The configurations of the liquid leakage determination unit 105b and the disconnection determination unit 105c of the control unit 105 will be described with reference to FIG. The liquid leakage determination unit 105b connects two resistors R1 and R2 connected in series, two resistors R3 and R4 connected in series, and the linear liquid leakage detection unit 101 in parallel with the resistor R4. and/or a connection terminal portion 105a arranged to be connected to the point-like liquid leakage detection portion 103 . The voltage measured at the connection point P1 between the resistors R1 and R2 is referred to as the reference voltage _VTH1 , the voltage measured at the connection point P2 between the resistors R3 and R4 is referred to as the voltage _V1 , and the reference voltage _VTH1 . and the voltage _V1 to determine the occurrence of leakage. It should be noted that the resistance value of the resistor R4 is set in advance so as to be higher than the electrical resistance value of the liquid to be detected for liquid leakage.

When liquid leakage occurs and the linear electrode portion 101a and the linear electrode portion 101b of the linear liquid leakage detection section 101 are electrically connected, the voltage _V1 becomes lower than when no liquid leakage occurs. lower than Leak determination unit 105 b transmits the information on occurrence of leak to communication unit 107 when determining that voltage _V1 is lower than reference voltage V _TH1 .

The disconnection determination unit 105c has two series-connected resistors R5 and R6, two series-connected resistors R3 and R4, and a connection terminal section 105a. The connection terminal portion 105a includes the linear liquid leakage detection portion 101 and/or the point liquid leakage detection portion 103 in parallel with the resistor R4, and the terminating resistance portion 101c of the linear liquid leakage detection portion 101. is connected as a combined resistance. The voltage measured at the connection point P3 between the resistor R5 and the resistor R6 is referred to as a reference voltage V _TH2 , the voltage measured across the connection terminal portion 105a is referred to as a voltage _V2 , and the reference voltage V _TH2 and the voltage _V2 are compared. By doing so, the occurrence of disconnection is determined.

Note that the liquid leakage determination unit 105b erroneously detects water leakage when the value of the combined resistance of the terminating resistance unit 101c connected for the disconnection determination unit _105c becomes a value lower than the reference voltage _VTH1 . Therefore, the values of the terminating resistor 101c and each resistor are adjusted so that the voltage _V1 does not become lower than the reference voltage _VTH1 even when the terminating resistor 101c is connected.

When a disconnection occurs and the electrical path via the linear liquid leakage detection unit 101 and/or the point-like liquid leakage detection unit 103 disappears, the voltage _V2 at the connection point P4 becomes lower than when the disconnection does not occur. and higher. When the disconnection determination unit 105 c determines that the voltage _V2 is higher than the reference voltage V _TH2 , the disconnection determination unit 105 c transmits disconnection occurrence information to the communication unit 107 .

The housing portion 111 accommodates the control portion 105 . FIG. 3 shows the appearance of the housing 111. As shown in FIG. FIG. 3A shows the state of the casing 111 viewed from the front side, and FIG. 3B shows the state of the casing 111 viewed from the rear side.

As shown in FIG. 3A, the housing portion 111 has a prismatic shape. The housing part 111 is integrated by fitting assembly in consideration of drip-proof and waterproof. The housing portion 111 has a slit portion 111a, an operation portion 111b, a state display portion 111c, and a fixing portion 111d. The slit portion 111 a is arranged along each side bottom edge of the housing portion 111 . The slit portion 111a is formed by a plurality of holes that communicate the inside and the outside of the housing portion 111 .

The slit part 111a is arranged inside the housing part 111 so that leakage can be detected using the point-like liquid leakage detection part 103 (see FIG. 3B) arranged on the back side of the housing part 111. , to guide leaking liquid to the rear side and to discharge leaking liquid that has entered the interior of the housing 111 . In addition, the slit portion 111a is arranged as a hole having a size that prevents insects and dust from entering in order to prevent malfunction due to entry of insects and dust into the housing portion 111 .

When connecting the linear liquid leakage detection unit 101 to the slit portion 111a, a harness connecting the connection end portion 101d of the linear liquid leakage detection portion 101 and the connection terminal portion 105a of the control unit 105 can be passed. A splitting process may be added to remove the walls that exist between adjacent holes. When the linear liquid leakage detection unit 101 is used, the wall is cut along the cut portion, and the harness of the linear liquid leakage detection unit 101 is passed through, thereby preventing the harness from floating from the installation surface of the housing unit 111. can be prevented.

The operation unit 111b is a button used when instructing various operations to the control unit 105 of the liquid leakage detection device 100 . For example, when a liquid leakage is detected using only the point-like liquid leakage detection unit 103, an operation mode that disables the determination by the disconnection determination unit 105c can be selected. This is because when detecting a liquid leak using only the point-like liquid leakage detection unit 103, the point-like liquid leakage detection unit 103 does not have an end point resistance unit. This is to prevent the disconnection determination unit 105c from constantly determining that a disconnection has occurred.

The state display unit 111c displays the operating state of the liquid leakage detection device 100. FIG. For example, the liquid leakage detection device 100 displays green when no liquid leakage is detected, red when liquid leakage is detected, and yellow when disconnection occurs. ,indicate. As a result, liquid leakage can be detected in real time simply by checking the state display section 111c without confirming the occurrence of liquid leakage or disconnection based on the liquid leakage occurrence information and disconnection occurrence information transmitted via the communication section 107. It is possible to check the state of the liquid leakage detection device 100, such as the occurrence of . The fixing portion 111d is a hole used to fix the liquid leakage detection device 100 at a desired location using a screw, bolt, or the like so that the liquid leakage detection device 100 is not washed away when liquid leakage occurs.

As shown in FIG. 3B, the connection terminal portion 105a is arranged inside the housing portion 111 on the back side. A connecting terminal portion 105a is connected to a connecting end portion 103c continuous from the point-like electrode portion 103a and the point-like electrode portion 103b of the leak detecting portion 103. FIG. Note that, as shown in FIG. 3A, the punctate liquid leakage detection unit 103 is arranged so as to be housed inside the housing unit 111 when viewed from the front side. Point-like electrode portions 103a and point-like electrode portions 103b of the point-like liquid leakage detecting portion 103 come into contact with the leaked liquid entering the inside of the housing portion 111 through the slit portion 111a of the housing portion 111. Thus, the occurrence of liquid leakage is detected.

2. Arrangement of Liquid Leakage Detection Device 100 An example of arrangement of the liquid leakage detection device 100 will be described with reference to FIGS. 4 and 5. FIG. In the case of using the linear liquid leakage detection unit 101, as shown in FIG. 4A, by arranging the linear liquid leakage detection unit 101 horizontally on the wall, for example, it is generated so as to flow along the wall in the vertical direction. It is possible to detect liquid leakage. Further, as shown in FIG. 4B, by arranging the linear liquid leakage detection unit 101 so as to form a rectangular shape on the floor, liquid leakage that flows out from the rectangular shape or flows in from the rectangular shape can be detected. can.

When the point-like liquid leakage detection units 103 are used, as shown in FIG. 5, a plurality of the point-like liquid leakage detection units 103 may be arranged in a matrix at locations where liquid leakage is desired to be detected.

Furthermore, by simultaneously using the linear liquid leakage detection unit 101 and the point-like liquid leakage detection unit 103 as shown in FIG. 4 and FIG. Further, by connecting the connection end 103c of the punctate liquid leakage detection unit 103 to the connection terminal 105a of the control unit 105 in parallel, liquid leakage can be detected at different locations by different detection methods.

[Other embodiments]
(1) Leakage determination unit 105b: In the above-described first embodiment, the liquid leakage determination unit 105b is mainly configured using resistors R1 to R4. The voltage between the linear electrode portions 101a and 101b of the portion 101 and/or the voltage between the point-like electrode portions 103a and 103b of the point-like liquid leakage detection portion 103 is used to determine the occurrence of liquid leakage. If so, it is not limited to the examples.

(2) Disconnection determination unit 105c: In the above-described first embodiment, the disconnection determination unit 105c is mainly configured using resistors R5 and R6. and/or the voltage between the point-like electrode portions 103a and 103b of the point-like liquid leakage detecting portion 103 to determine the occurrence of disconnection. , but not limited to the examples.

(3) Communication unit 107: In the first embodiment, the communication unit 107 communicates using a wireless LAN, but may communicate via a base station using a mobile phone line or the like. . Also, a communication method such as Sigfox (registered trademark), which is compatible with so-called LPWA (Low Power, Wide Area) and capable of "low current consumption" and "long-distance data communication" may be used.

Wired communication such as Ethernet or MobBus may be used instead of wireless communication.

(4) Power supply unit 109: In the first embodiment described above, the power supply unit 109 uses a button battery. Not limited. For example, a predetermined battery such as a dry battery or a solar battery may be used, or power may be received from a generally installed AC outlet or storage battery. Furthermore, non-contact power supply, so-called wireless power supply, or various types of energy harvesting may be used.

(5) Object to be detected: In the first embodiment described above, water was shown as an object to be detected. The liquid is not limited to the exemplified one as long as it is connected to and reduces the resistance. For example, animal urine or insect effluent can be detected as targets.

(6) Heat detection unit: In the first embodiment described above, a heat detection unit capable of detecting movement of a heat source such as a living thing may be arranged. As a result, animals such as rats can be detected not only by the discharge fluid but also by the heat change during movement.

(7) Object to be Detected: In the above-described first embodiment, the change in resistance value is determined by the threshold value. This makes it possible to detect changes in the components of the liquid while the target is immersed in the liquid. At that time, a temperature sensor may be mounted to correct the amount of change due to temperature change.

(8) Housing 111: In the first embodiment, the housing 111 has a prismatic shape, but it may have another shape such as a cylindrical shape or a hemispherical shape for reasons of ease of installation and design.

(9) Notification of liquid leakage and wire breakage: In the first embodiment described above, notification of liquid leakage and wire breakage is sent as liquid leakage information and wire breakage information through the communication unit 107 in a predetermined communication. Although it is assumed that it is transmitted to the terminal, it is not limited to the example. For example, a warning sound generator that generates a warning sound such as a buzzer when liquid leakage or elasticity occurs may be arranged in the liquid leakage detection device. Also, a vibration generating section that generates vibration such as that provided in a smart phone or the like may be arranged when liquid leakage or elasticity occurs.

The liquid leakage detection device according to the present invention can be used in places where it is necessary to check for liquid leakage, for example, near the plumbing of buildings and general houses, in attics where there is a possibility of rain leakage, and in warehouses and factories where there is a risk of flooding. can be used.

REFERENCE SIGNS LIST 100 liquid leakage detection device 101 linear liquid leakage detection unit 101a linear electrode unit 101b linear electrode unit 101c terminating resistance unit 101d connection end 103 point-like liquid leakage detection unit 103a dotted electrode unit 103b dotted electrode unit 103c connection end Part 105 Control Part 105a Connection Terminal Part 105b Liquid Leakage Judgment Part 105c Disconnection Judgment Part 107 Communication Part 109 Power Supply Part 111 Case Part 111a Slit Part 111b Operation Part 111c State Display Part 111d Fixed Part VTH1 Reference Voltage VTH2 Reference Voltage V1 Voltage V2 Voltage R1 resistor R2 resistor R3 resistor R4 resistor R5 resistor R6 resistor P1 connection point P2 connection point P3 connection point P4 connection point

Claims (6)

A connection terminal portion for connecting a linear liquid leakage detection portion having a linear electrode portion which is a pair of linear electrodes,
a point-like liquid leakage detection unit having a point-like electrode portion which is a pair of point-like electrodes connected to the connection terminal portion;
a liquid leakage determination unit that determines occurrence of liquid leakage using the voltage between the connection terminals;
a communication unit that transmits liquid leakage occurrence information when the liquid leakage determination unit determines that liquid leakage has occurred;
A liquid leakage detection device having a In the liquid leakage detection device according to claim 1,
The liquid leakage determination unit
determining the occurrence of liquid leakage by comparing a predetermined reference voltage across the connection terminals with a measured voltage across the connection terminals;
A liquid leakage detection device characterized by: In the liquid leakage detection device according to claim 1 or claim 2, further,
a disconnection determination unit that determines occurrence of disconnection in the linear liquid leakage detection unit using a voltage between the connection terminals when the linear liquid leakage detection unit is connected to the connection terminal unit;
A liquid leakage detection device having a In the liquid leakage detection device according to claim 3,
The disconnection determination unit
By comparing a predetermined reference voltage between the connection terminal portions and a measured voltage between the connection terminal portions when the linear liquid leakage detection portion is connected to the connection terminal portion, the linear Determining the occurrence of disconnection in the liquid leakage detection unit,
A liquid leakage detection device characterized by: In the liquid leakage detection device according to claim 4,
a housing that houses at least the liquid leakage determination unit, the housing having the point electrodes of the point liquid leakage detection unit arranged along the back surface;
has
The housing part is
Having a slit part that takes in leaked liquid from the outside to the point-like electrode,
A liquid leakage detection device characterized by: In the liquid leakage detection device according to claim 5,
The housing part is
an operation unit that instructs the operation of the liquid leakage determination unit and/or the disconnection determination unit;
a display unit that displays the determination by the liquid leakage determination unit and/or the disconnection determination unit;
having
A liquid leakage detection device characterized by:

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