KR20190074682A - Sensor module for sensing immersion and water level - Google Patents

Abstract

According to one embodiment of the present invention, a sensor module for sensing flooding and a water level comprises: a package cover part which has open one side and is formed on an inflow passage through which the fluid flows into the inner space; a water level sensing part which is embedded so as to be formed on the ground to sense a pressure applied by the fluid by being exposed to the ground by the pressure sensing part in an internal space; a flooding sensing part surrounding the periphery of the pressure sensing part, and including a plurality of electrodes formed on a same plane as the pressure sensing part and arranged to be electrically insulated from each other; and a sensor protection part formed so as to cover the water level sensing part and the flooding sensing part, and including a sensor casing having a plurality of through-holes. Therefore, an objective of the present invention is to provide the sensor module for sensing flooding and a water level, wherein the present invention is configured to form the water level sensing part which measures the water level and the flooding sensing part which measures flooding.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a sensor module,

The present invention relates to a sensor module for immersion and level sensing.

As a result of urbanization, asphalt and other roads are formed, which reduces the amount of soil that can absorb rainwater when it rains. In order to compensate for this, sewage is managed by the urban drainage system. However, when local rainfall occurs in a short time, the possibility of inundation of the road is increased because the drainage system exceeds the limit that can be treated .

Such inundation of roads may lead to inundation of vehicles driving on the roads, and in case people in nearby lowland areas can not evacuate quickly due to localized torrential rains, this may lead to personal injury. On the other hand, in Korea, unlike the past, due to the climate change, localized heavy rainfall has been continuously causing human and material damage every year.

In order to confirm the flooding due to the heavy rain, the water level was measured through the time when the sound waves generated from the ultrasonic wave generator were returned using the ultrasonic type water level sensor.

KR 20-0461904 Y1

An object of an embodiment of the present invention is to provide a sensor module for immersion and level sensing, which is configured to form a water level sensing unit for measuring a water level and a flooded sensing unit for measuring immersion status.

It is another object of the present invention to provide a sensor module for flood and water level sensing which is configured to form a package cover portion having a package cover member for preventing foreign matter from flowing into an internal space and to form a sensor protection portion for preventing malfunction of the water level sensing portion and the flood sensing portion .

The present invention also provides a sensor module for flood and water level sensing that enables stable sensing of a water level sensing unit and a flooded sensing unit in response to a change in an instantaneous inflow flow rate from the outside by forming a wall portion.

The sensor module for detecting flood and water level according to an embodiment of the present invention includes a package cover part formed on an inflow path where one side opens and a fluid flows into an internal space, A plurality of electrodes formed on the same plane as the pressure sensing unit and arranged to be electrically insulated from each other, and a plurality of electrodes disposed on the same plane as the pressure sensing unit, And a sensor protector including a sensor casing formed to cover the water level sensing unit and the flooded sensing unit and having a plurality of through holes.

Further, the plurality of electrodes are formed in at least a pair of semicircular shapes that are symmetrical to each other and separated from each other.

In addition, the plurality of electrodes are formed in a quadrangular shape separated from each other.

In addition, the package cover portion includes a package cover member in a mesh shape.

The sensor protection unit may further include a sensor cover member having a mesh shape on one side of the sensor casing, and the mesh diameter of the package cover member is larger than the mesh diameter of the sensor cover member.

The apparatus further includes a wall portion spaced apart from the package cover portion by a predetermined distance so that the opposing surface is perpendicular to the inflow direction of the fluid.

Further, the wall portion further includes a passage through which the fluid flows into and from the lower end portion of the opposing surface.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

Prior to this, terms and words used in the present specification and claims should not be construed in a conventional and dictionary sense, and the inventor may appropriately define the concept of a term in order to best describe its invention The present invention should be construed in accordance with the spirit and scope of the present invention.

According to an embodiment of the present invention, there is an advantage that the water level sensing unit and the flood sensing unit are integrally formed to measure the level of immersion and the level of the flood, thereby improving the measurement reliability of the sensor module for immersion and water level sensing.

In addition, it is possible to minimize the inflow of foreign matter into the internal space through the package cover member of the package cover unit and the sensor cover member of the sensor protection unit, thereby preventing the occurrence of sensing errors of the water level sensing unit and the flooded sensing unit.

In addition, there is an advantage that the water level sensing unit and the flood sensing unit are protected from the physical impact that may be applied to the sensor protection unit, thereby extending the life of the sensor module for immersion and level sensing.

In addition, it is possible to form a wall portion having a counterpart surface perpendicular to the inflow direction, which is spaced apart from the package cover portion by a predetermined distance, so that even if a large amount of fluid is temporarily introduced from the outside, the fluid is slowly introduced, .

1 is a cross-sectional view of a level detecting portion in a sensor of the present invention.
2 is a cross-sectional view of a flooding detection unit of the sensor of the present invention.
3 is a cross-sectional view of a sensor according to an embodiment of the present invention.
4 is a cross-sectional view of a sensor module for immersion and water level sensing according to an embodiment of the present invention.
5 is a cross-sectional view of a sensor module for immersion and water level sensing according to an embodiment of the present invention.
FIG. 6 is an enlarged top plan view of an immersion sensing unit and a water level sensing unit of the immersion and level sensing module according to an embodiment of the present invention.
FIG. 7 is an enlarged top plan view of an immersion sensing unit and a water level sensing unit of the immersion and level sensing module according to an embodiment of the present invention. FIG.
FIG. 8 is an enlarged top plan view of an immersion sensing unit and a water level sensing unit of the immersion and level sensing module according to an embodiment of the present invention.
FIG. 9 is a schematic view showing the connection of respective parts of the sensor module for flooding and water level detection according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The objectives, specific advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings. Also, the terms "one side," " first, "" first," " second, "and the like are used to distinguish one element from another, no. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description of the present invention, detailed description of related arts which may unnecessarily obscure the gist of the present invention will be omitted.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, in which like reference numerals refer to like elements.

FIG. 1 is a cross-sectional view of a level detecting unit 100 of the present invention, and FIG. 2 is a sectional view of a flooded sensing unit 200 of the present invention. 3 is a cross-sectional view of a sensor according to an embodiment of the present invention.

1 to 3, a sensor according to an exemplary embodiment of the present invention includes a water level sensing unit 100 and a water immersion sensing unit 200 integrated with each other. A hole 220 is formed in the center of the flooded sensing part 200 so that the level sensing part 100 can be inserted and fixed in the center hole 220 of the flooded sensing part 200. Accordingly, the water level sensing unit 100 can be supported without shaking even when the fluid flows in and out, thereby enhancing the reliability of sensing. Further, by using the sensor according to an embodiment of the present invention, it is possible to perform both the sensing of the flooding and the measurement of the level of the flooded area. The features and advantages related thereto will be described later.

4 is a cross-sectional view of a sensor module 10 for detecting flooding and water level according to an embodiment of the present invention.

4, the sensor module 10 for immersion and level sensing according to an exemplary embodiment of the present invention includes a package cover part (not shown) formed on an inflow path where one side opens and a fluid flows into the internal space 420, A pressure sensing unit 100 embedded in the internal space 420 so as to be formed on the ground to sense the pressure applied by the fluid exposed to the surface of the pressure sensing unit 110, A flood sensing unit 200 surrounding the periphery of the pressure sensing unit 110 and including a plurality of electrodes 210 formed on the same plane as the pressure sensing unit 110 and electrically insulated from each other, And a sensor casing 300 including a sensor casing 310 and a sensor casing 310 covering the immersion sensor 200 and having a plurality of through holes 320.

Referring to FIG. 4, the package cover part 400 is formed perpendicular to the paper surface, and has an inflow passage through which one side is opened and fluid can flow. At this time, the water level sensing unit 100 is formed in the internal space 420 formed by the package cover unit 400 having one side opened and an inflow passage. The water level sensing unit 100 has a cylindrical pressure sensing unit 110. The cylindrical pressure sensing unit 110 of the water level sensing unit 100 is pressurized by a fluid flowing through a surface opened at one side in a rainy period and receives a force acting on the area of the upper surface of the pressure sensing unit 110, Conversion. The electrical signal thus converted is processed by a predetermined process to measure the current water level.

The flood sensing unit 200 is formed around the pressure sensing unit 110. The flooding detection unit 200 forms a plurality of electrodes 210 on the upper surface facing the ground surface and the plurality of electrodes 210 are formed so as to surround the periphery of the pressure sensing unit 110 of the level sensing unit 100 . In addition, the plurality of electrodes 210 are electrically insulated from each other and have mutual capacitance. When the fluid flows into the open side of the sensor module 10 for flood and water level sensing in a rainfall, the fluid flows on the plurality of electrodes 210 formed on the ground surface. When the electrodes 210 are exposed to the air, they are electrically insulated from each other, but short-circuiting occurs between the electrodes 210 due to inflow of a fluid having a resistance lower than air. As a result, the mutual capacitance changes, and the immersion sensing unit 200 measures the immersion state according to the change of the mutual electrostatic capacitance. By configuring the sensor module 10 for detecting flood and water level integrally formed so as to have the water level sensing unit 100 and the flood sensing unit 200 together, And it is possible to measure the level of the level of the flooded water to some extent, thereby increasing the reliability of the measurement.

Meanwhile, the pressure sensing unit 110 of the water level sensing unit 100 and the plurality of electrodes 210 of the water immersion sensing unit 200 are buried in the same plane. The fluid is introduced into the sensor module 10 for sensing the immersion and level of water and embedded by the electrode 210 of the immersion sensor 200 so that the fluid is immersed The pressure sensing unit 110 of the water level sensing unit 100 can acquire the water level information by the water pressure.

6 to 8 are enlarged top plan views of the immersion sensing unit 200 and the level sensing unit 100 of the immersion and level sensing module 10 according to an embodiment of the present invention.

Referring to FIG. 6, a pair of electrodes 210 are formed in a semicircular shape around the pressure sensing unit 110 of the level sensing unit 100. At this time, the pair of electrodes 210 are electrically isolated from each other at a predetermined interval, and thus have mutual capacitance. When the fluid flows into the open side of the sensor module 10 for detecting flooding and water level in a rainy day, the fluid flows through a pair of semicircular electrodes 210 formed on the ground surface. When the fluid is placed between a pair of electrically insulated electrodes 210, a mutual capacitance change occurs between the electrodes 210 by the fluid, so that the immersion can be measured by this change. The water level sensing unit 100 can measure the pressure applied to the pressure sensing unit 110 through the pressure sensing unit 110 and derive the water level of the area where the sensor module 10 for immersion and water level sensing is installed . The flood sensing unit 200 and the water level sensing unit 100 may operate simultaneously and the water level sensing unit 100 may be operated after the flood sensing unit 200 is first operated and determined to be flooded. .

7 and 8 are enlarged top plan views of the immersion sensing unit and the water level sensing unit of the immersion and level sensing module according to an embodiment of the present invention. 7 and 8, the arrangement of the plurality of electrodes 210 of the flood sensing unit 200 may be variously configured. FIG. 7 shows a configuration in which a plurality of electrodes 210 of the flood sensing unit 200 are formed by four quadrants polarized, and FIG. 8 shows a configuration of two pairs of semicircular electrodes 210 formed symmetrically. At this time, the electrodes 210 are electrically insulated from each other, and when the electrode is short-circuited by the fluid due to the inflow of the fluid in the rain, it is possible to detect the flooding depending on the mutual capacitance change. At this time, all of the electrodes 210 in the form of quadrants shown in Fig. 7 are covered by the fluid to judge whether the electrodes are flooded, or two pairs of semicircular electrodes 210 shown in Fig. 8 are covered by the fluid It is possible to judge whether or not it is flooded.

Referring again to FIG. 4, the package cover portion 400 includes a package cover member 410 in the form of a mesh. The package cover member 410 reduces the inflow of foreign matter together with the fluid flowing into the internal space 420 from the outside. Accordingly, there is an advantage that the malfunction of the sensor, which may be caused by the foreign substances being introduced into the water level sensing unit 100 and the flooded sensing unit 200, is prevented.

In order to protect the pressure sensing part 110 of the water level sensing part 100 and the electrode 210 of the water immersion sensing part 200 by covering the upper surface of the water level sensing part 100 and the flooded sensing part 200, A portion 300 is formed. The sensor protection unit 300 protects the sensors from foreign substances that may enter together with the inflowing fluid and from external impacts. The sensor protection unit 300 includes a sensor casing 310 for protecting the sensors from external impacts and the sensor casing 310 includes the electrode 210 of the flooded sensing unit 200 and the water level sensing unit 100, And a plurality of through holes 320 so that the fluid can pass through the pressure sensing part 110 of the pressure sensing part 110. The sensor casing 310 of the sensor protection unit 300 may be formed of a material having a high rigidity so as not to be deformed even when subjected to an external impact. The sensor casing 310 of the sensor protection unit 300 protects the water level sensing unit 100 and the water immersion sensing unit 200 from physical impacts that may be applied to the sensor, There is an advantage of extending the life span.

The plurality of through-holes 320 formed in the sensor casing 310 may be formed in a circular shape, but the present invention is not limited thereto. The sensor casing 310 physically protects the water level sensing unit 100 and the flood sensing unit 200, The shape and the number of the through holes 320 can be determined within a range in which the function of the through hole 320 is maintained and the influence on the sensing of the water level sensing unit 100 and the flood sensing unit 200 is minimized.

 4, a through hole 320 is formed in the sensor casing 310 of the sensor protection unit 300 and the through hole 320 is formed of a sensor cover member 330. The sensor cover member 330 minimizes the movement of the foreign matter together with the fluid flowing into the sensors (the water level sensing unit 100 and the flooding sensing unit 200). It is advantageous to prevent the occurrence of sensing errors of the water level sensing unit 100 and the flooding sensing unit 200 by minimizing the movement of foreign matter to the sensor. In addition, foreign matter having a relatively large size is first filtered through the package cover member 410 of the package cover unit 400, and then, through the sensor cover member 330 of the sensor protection unit 300, Foreign matter having a large size is re-filtered so that the foreign matter introduced into the sensor is minimized, thereby preventing the occurrence of a sensing error. In this case, the sensor cover member 330 may be disposed within a range that minimizes the influence of the liquid level sensing unit 100 and the flooded sensing unit 200 upon sensing the fluid when the fluid flows through the sensor cover member 330 Lt; / RTI >

5 is a cross-sectional view of a sensor module for immersion and water level sensing according to an embodiment of the present invention. Referring to FIG. 5, the sensor cover member 330 may be formed to be coupled to one side of the sensor casing 310. 5, the sensor cover member 330 of the sensor protection unit 300 is illustrated as being formed on the outer side of the sensor casing 310. However, the sensor cover member 330 is not limited thereto and may be formed on the inner side of the sensor casing 310. [ The sensor cover member 330 shown in FIG. 5 minimizes the movement of foreign matter to the sensor, such as the sensor cover member 330 shown in FIG. 4, so that the sensing error of the water level sensing unit 100 and the flooded sensing unit 200 .

The mesh diameter of the package cover member 410 of the package cover unit 400 is formed to be larger than the mesh diameter of the sensor cover member 330 of the sensor protection unit 300. In this case, the mesh diameter refers to the diameter of the circular hole when each circular member has a circular shape, and when formed from a polygonal mesh, the mesh diameter can be defined as an average of the lengths of the long and short axes of the mesh have. If the mesh diameter of the package cover member 410 is small, the flow rate of the fluid from the outside or the flow rate per unit time may be affected from the outside, and the possibility of error between the water level measured by the water level sensing unit 100 and the actual water level increases , It is preferable that the package cover member 410 is formed so that the foreign matter can be filtered without affecting the inflow of the fluid. On the other hand, in the case of the sensor cover member 330, it is preferable that the sensor cover member 330 is formed of a permeable material so as to minimize the inflow of foreign substances into the sensors (the water level sensing unit 100 and the water immersion sensing unit 200) to prevent malfunction of the sensor.

In addition, the sensor module 10 for immersion and level sensing further includes a wall portion 500 having a counter surface formed so as to be perpendicular to the inflow direction in which the fluid is separated from the package cover portion 400 by a predetermined distance. If the fluid is temporarily flown in and out at the same time due to the movement of the vehicle or the like, it may affect the normal water level detection. Accordingly, the wall portion 500 may be formed of a non-permeable material so as not to directly pass through the wall portion 500 while forming an opposing surface perpendicular to the fluid entering direction. The wall portion 500 functions as a breaker before the fluid enters the internal space 420 and prevents the fluid from passing through the gap formed around the opposing surface of the wall portion 500 at a time. Accordingly, there is an advantage that the reliability of the measurement of the water level sensing unit 100 and the flooding sensing unit 200 is improved. 1, the wall part 500 may be formed at a position spaced apart from the package cover part 400 by a predetermined distance. However, the wall part 500 may be formed at a predetermined distance from the package cover part 410 of the package cover part 400, As shown in FIG.

The wall portion 500 of the sensor module 10 for immersion and level sensing may further include a passage (not shown) through which fluid flows into and from the lower end of the opposing surface. The wall part 500 enhances the measurement reliability of the water level sensing part 100 and the flooding sensing part 200 by preventing a large amount of fluid from being temporarily introduced into the fluid flowing from the inflow channel. In this case, when the fluid flows into the package through the passageway formed at the lower end of the opposing face, due to the reason such as the vehicle passing through the area, a large amount of fluid flows into the package, It is advantageous to increase the measurement reliability of the water level sensing unit 100 and the flooding sensing unit 200 by allowing the water level to flow at a constant rate or less per unit time.

Hereinafter, an embodiment of a sensor module system for flooding and water level detection using the sensor module 10 for immersion and level detection of the present invention will be described.

5, the water level sensing unit 100 and the water immersion sensing unit 200 are electrically connected to the control unit 800, the control unit 800 is connected to the signal transmission unit 700, The housing 600 is formed inside the housing 600, and the entire surface of the housing 600 is closed to prevent the signal transmitter 700 from leaking.

FIG. 9 is a schematic view showing connections of respective parts of the sensor module 10 for flooding and water level detection according to an embodiment of the present invention.

4, 5 and 9, measured values measured by the water level sensing unit 100 and the flooded sensing unit 200 are transmitted to the control unit 800 electrically connected to each other. The control unit 800 determines whether the water is flooded or not according to a change in mutual capacitance between the electrodes 210 of the flood sensing unit 200 and also determines whether the water is inundated from the pressure measured by the pressure sensing unit 110 of the water level sensing unit 100 We derive local water level. The derived information can be transmitted to the central system, such as the situation room of the local government, through the signal transmission unit 700. The central system which received this information judged the risk of the area according to the immersion and level information and issued a warning alarm using the local loudspeaker installed in the area or contacted the household with the risk of flooding the low area can do. Meanwhile, the control unit 800 may be a board using a LoRa (Long Range, low power wireless platform) technology, and the signal transmission unit 700 may also transmit information to the central system through LoRa technology.

The signal transmission unit 700 is formed inside the housing 600 spaced apart from the upper surface of the water level sensing unit 100 and the flooded sensing unit 200 by a predetermined distance. The housing 600 in which the signal transmitter 700 is formed is configured such that the entire surface thereof is closed so that the fluid including the foreign material is not leaked to the inside. In addition, the housing 600 is formed of a material having a small strain according to applied stress, so that deformation can be minimized even if a load is applied from the outside. For example, when the pedestrian passes over the housing 600, even if the weight of the pedestrian is applied to the housing 600, the deformation of the housing 600 is not easily caused by the weight of the pedestrian. There is an advantage that the signal transmitter 700 is protected from leaking and external physical impact by the housing 600 to prevent malfunction of the signal transmitter 700 and extend the service life of the sensor module 10 for immersion and water level detection .

Meanwhile, the control unit 800 is electrically connected to a plurality of alarm units 900, and the alarm unit 900 includes a light emitting type alarm and a noise generating type alarm. In this case, the light emitting type alarm may be a monochromatic illumination, or may be a multicolor illumination that can emit different colors depending on the level. Further, the light emitting type alarm can be controlled to be lit when the water level above a certain height is measured, or can be controlled to flash with a predetermined time interval. The noise generating type alarm may be controlled to generate a siren when a water level above a certain height is measured, or may be controlled so that a guidance sound is emitted. A sensor module for immersion and water level detection is installed by an alarm unit 900 included in the immersion and water level sensing sensor module 10 as well as taking measures in the central system through the signal transmitter 700 as described above It is advantageous in that it is possible to respond quickly to the situation in the field before the action by the central system is performed.

In addition, a temperature sensing unit 1000 formed at a predetermined distance from the ground in the sensor module 10 for immersion and level sensing and further electrically connected to the control unit 800 is formed. The temperature sensing unit 1000 serves to measure the ambient temperature. The water level sensing unit 100 and the water immersion sensing unit 200 have optimal operating temperatures for sensing the pressure applied to the pressure sensing unit 110 and the mutual capacitance of the electrode 210, The sensing sensitivity of the water level sensing unit 100 and the water immersion sensing unit 200 is lowered, thereby increasing the possibility of an error in sensing. In order to prevent this, the controller operates so as to control the operation of the water level sensing unit and the flood sensing unit according to the ambient temperature sensed by the temperature sensing unit 1000. More specifically, when it is detected that the outside air temperature is out of the operating temperature range of the sensors (the water level sensing unit 100 and the water immersion sensing unit 200) by the ambient temperature measurement of the temperature sensing unit 1000, The water level sensing unit 200 and the water level sensing unit 200 are disconnected from each other. When the outside temperature is outside the operating temperature range of the sensor, power consumption can be minimized by cutting off the power supply, thereby preventing the occurrence of sensing error and consequently extending the service life of the sensor module 10 for flooding and water level detection.

Meanwhile, the sensor module 10 for immersion and level sensing according to the present invention may be powered by a battery, or may be powered by a constant power source located near the sensor module 10 for immersion and level sensing .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not to be limited to the details thereof, It will be apparent that modifications and improvements can be made by those skilled in the art.

It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

10: Sensor module for immersion and level detection
100:
110: Pressure sensing unit
200: flood sensing unit
210: electrode
220: hole
300: Sensor protection unit
310: Sensor casing
320: Through hole
330: sensor cover member
400: package cover part
410: package cover member
420: inner space
500: wall portion
600: housing
700: Signal transmitter
800:
900: Alarm Department
1000: Temperature sensing unit

Claims (7)

A package cover portion formed on the inflow passage through which the fluid flows into the internal space, the package cover portion being opened on one side;
A water level sensing part embedded in the internal space such that a pressure sensing part is formed on the ground to sense a pressure applied by the fluid exposed on the ground surface;
A submergence sensing unit that surrounds the pressure sensing unit and includes a plurality of electrodes formed on the same plane as the pressure sensing unit and arranged to be electrically insulated from each other; And
And a sensor casing including a sensor casing formed to cover the water level sensing unit and the flooded sensing unit and having a plurality of through holes. The method according to claim 1,
Wherein the plurality of electrodes are symmetrical to each other and formed in at least a pair of semicircular shapes separated from each other. The method according to claim 1,
Wherein the plurality of electrodes are symmetrical with respect to each other and formed in a separated quadrangle shape. The method according to claim 1,
Wherein the package cover portion includes a mesh-like package cover member. The method according to claim 1,
The sensor protection unit
And a sensor cover member in the form of a mesh on one side of the sensor casing,
Wherein a mesh diameter of the package cover member is larger than a mesh diameter of the sensor cover member. The method according to claim 1,
And a wall portion having a counter surface formed at a predetermined distance from the package cover portion and perpendicular to an inflow direction of the fluid. The method of claim 6,
And a passage through which the fluid flows into and from the lower end of the opposing wall.

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