KR101971992B1 - Water monitoring sensor for easy disassembly and assembly - Google Patents

Abstract

The present invention relates to a groundwater monitoring sensor easy to disassemble and assemble, capable of protecting an electrode rod and other electric components from groundwater. According to the present invention, the groundwater monitoring sensor which is easy to disassemble and assemble comprises: a sensor unit (10) detecting information about groundwater; a substrate unit (20) having a device mounted therein to process the detected information for the groundwater; a transmission unit (30) transmitting the processed information; and a cable (40) connected to the transmission unit to transmit the information about the groundwater to a monitoring body.

Description

[0001] WATER MONITORING SENSOR FOR EASY DISASSEMBLY AND ASSEMBLY [0002]

The present invention relates to a groundwater monitoring sensor, and more particularly, it relates to a groundwater monitoring sensor, in which an electrode member (input electrode, output electrode) for obtaining conductivity, which is groundwater information, And other electrical components from underground water to facilitate disassembly and assembly.

This section provides background information related to the subject matter of this application and is not necessarily prior art.

 In general, ground water is a part of precipitation that permeates into gaps in the ground and accumulates in the gap between the ground and an unspecified ground located at a predetermined depth from the ground.

The water quality of groundwater is usually clean and clean, but the water quality is gradually getting polluted as the life develops and the industry develops. Especially in the industrial area such as the factory area, groundwater pollution is rapidly proceeded, In fact.

Therefore, people drill groundwater wells indiscriminately to find uncontaminated groundwater, and groundwater pollution is increasing. Therefore, it is urgently required to continuously manage groundwater.

As a method for managing groundwater, several groundwater aquifers are selected in the area where pollution is suspected and the operator directly observes and manages the groundwater.

In order to observe and manage the groundwater, it is necessary to periodically measure the water quality of the groundwater, that is, the conductivity, water temperature, pH, and water level.

Patent Document 10-1766766 discloses an electric conductivity measuring sensor having a cylindrical body, which comprises an output electrode and an input electrode, and the output electrode and the input electrode are brought into contact with a fluid to be measured for electric conductivity, A first sensor unit for acquiring a conductivity measurement signal; And a second sensor unit for measuring the temperature of the fluid to be measured for electric conductivity, wherein the output electrode and the input electrode are arranged on a side surface of the cylindrical body, Wherein the second sensor unit includes a signal input unit that is disposed on one end of the cylindrical body, and the output electrodes are spaced apart from each other, and the first ring-shaped output electrode And a second ring-shaped output electrode, wherein the input electrode includes a first ring-shaped input electrode and a second ring-shaped input electrode which are disposed to be spaced apart from each other between the first ring-shaped output electrode and the second ring- The output electrode and the input electrode are manufactured so as to be exposed at the periphery of the body, so that it is difficult to manufacture and only the input electrode and the output electrode are repaired Difficult.

Patent Document (Registration No. 10-0865639) discloses an electrical conductivity measuring apparatus for measuring electrical conductivity in water, comprising: a signal generator for generating an electrical signal; An output electrode for receiving and outputting an electrical signal generated by the signal generator; An input electrode for receiving an electrical signal from the output electrode; And determining an electrical conductivity based on the electrical signal received by the input electrode, determining which range the determined electrical conductivity belongs to, and determining the magnitude of the electrical signal to be within a first range if the determined electrical conductivity falls within a first range, And controlling the signal generator to generate the electrical signal in a second size when it is determined that the determined electrical conductivity falls within the second range, Wherein the first circular electrode and the second circular electrode are located inside the second circular electrode, and the first circular electrode and the second circular electrode are located inside the second circular electrode, The first circular electrode and the second circular electrode are made of a graphite material, and the input electrode and the output electrode It is difficult to repair because it is manufactured in the form of a concentric circle with the insulator on the opposite sides of the measuring device in the cylindrical shape. Therefore, it is necessary to replace the entire measuring device even when only the input electrode and the output electrode need to be replaced .

Patent No. 10-1766766 Patent No. 10-0865639

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an electrode assembly (input electrode and output electrode) for obtaining conductivity, which is groundwater information, And to provide a groundwater monitoring sensor that is easy to disassemble and assemble to protect groundwater from other electrical components (substrate, transfer part).

The present invention provides a groundwater monitoring sensor that is easy to disassemble and assemble, comprising: a sensor unit for sensing groundwater information in contact with groundwater; A substrate unit on which an element for processing information of groundwater sensed by the sensor unit is mounted; A transfer unit for transferring information processed by the elements of the substrate unit; And a cable for transmitting groundwater information to the monitoring body. The sensor unit includes a tubular sensor case, a sensor cap accommodated in the sensor case from the front side, a sensor body, a sensor mounter, And an electrode rod which is assembled by the sensor body and the sensor mount to input and output an electric signal, an O-ring which is coupled to the periphery of the sensor body and closely contacts the inner surface of the sensor case to secure water tightness, And a connector for connecting the sensor case and the transfer unit, wherein the substrate unit includes a substrate inserted into the sensor case and connected to the electrode bar, and a substrate connector connected to the substrate, A cable housing coupled to the interior of the cable housing, A cable connector connected to the board connector, a cable cap coupled to a periphery of the cable housing and water-tightly assembled to the connector through an O-ring, and a cable socket assembled to the rear of the cable housing. do.

The groundwater monitoring sensor according to the present invention includes a sensor body for contacting the groundwater and measuring the conductivity of the groundwater through input / output of an electrical signal. The sensor unit includes a sensor body, The sensor body includes an electrode insertion hole having a groundwater inflow hole formed to communicate with the inside and outside of the sensor body and a contact portion opened to communicate with the groundwater inflow hole, The electrode rod is detachably inserted into the electrode insertion hole, and electrical signals are input and output while being in contact with groundwater at the contact portion.

According to the groundwater monitoring sensor according to the present invention, the electrode member (input electrode, output electrode) for measuring the conductivity of the groundwater is formed into a rod shape, and the sensor body and the sensor cap are mechanically It is possible to disassemble the sensor part by loosening the fasteners, so that it is possible to select and replace only the parts requiring replacement from all of the components as well as the electrode. Therefore, it is very easy to repair and therefore, And can be supplied at a more reasonable price than existing products.

In addition, a sensor unit including an electrode rod is of a prefabricated type, but the groundwater is prevented from penetrating through the circumference of the electrode rod by an exponential ring coupled to the periphery of the electrode rod, and a wedge-shaped cable clamp is fastened to the cable socket To the cable housing and to the periphery of the cable to prevent the groundwater from penetrating, thereby safely protecting the electric part of the sensor from the groundwater. Especially, compared with the conventional sensor, it is difficult to reuse by the molding process, It is possible to solve the increase in cost and burden due to the handling of facilities and materials, and as a result, the groundwater information and the reliability of the sensor product can be improved and the durability of the sensor can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing an assembled state of a groundwater monitoring sensor according to an embodiment of the present invention. FIG.
2 is an exploded view of a groundwater monitoring sensor according to the present invention, which is easy to disassemble and assemble.
FIG. 3 and FIG. 4 are exploded views of the sensor body, the sensor mounter and the electrode of the sensor unit applied to the groundwater monitoring sensor according to the present invention.
FIG. 5 is a sectional view showing an assembled state of an electrode applied to a groundwater monitoring sensor according to the present invention, which is easy to disassemble and assemble; FIG.
FIG. 6 is a block diagram showing a configuration of conductivity measurement applied to a groundwater monitoring sensor that is easy to disassemble and assemble according to the present invention. FIG.

In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the present invention, and these may be changed according to the intention of the user, the operator, or the like. Therefore, the definition should be based on the contents throughout this specification.

As shown in FIG. 1, the groundwater monitoring sensor of the present invention, which is easy to disassemble and assemble, is basically composed of a sensor unit 10, a substrate unit 20, a transmission unit 30, and a cable 40 And the watertightness is ensured between the sensor unit 10 and the substrate unit 20, between the substrate unit 20 and the transfer unit 30, and between the transfer unit 30 and the cable 40, Is as follows.

The sensor unit 10 includes a tubular sensor case 11, a sensor body 12, an electrode rod 13, a sensor mounter 14, a sensor cap 15, a spacer 16, a connector 17, And an O-ring 18 that is coupled to the periphery of the outer ring 12.

The sensor case 11 is formed in a tubular shape in which both sides of the sensor case 11 are opened to allow the substrate 20 to be inserted and installed therein.

The sensor case 11 is provided with a sensor cap assembling step 11a for fitting the sensor cap 15 to the front end portion thereof, a mounting step 11b to which the sensor mount 14 is fixed between the front end portion and the rear end portion, (11a, 11b, 11c) are formed on the inner circumferential surface, respectively. The connector assembly 11c has a tapered cross section in which an inner diameter of the tapered section 17 is increased.

3 and 4, the sensor body 12 includes a sensor body body 12a having a tubular structure, a groundwater inflow hole 12b formed in the sensor body body 12a so as to communicate with the outside and the inside, A plurality of electrode insertion holes 12c into which the sensor body body 12a is inserted, and an O-ring insertion groove 12d formed along the circumferential surface of the sensor body body 12a.

The sensor body body 12a is generally cylindrical with the same outer diameter and is water-tightly inserted (press-fitted) into the sensor case 11 through an O-ring 18.

As shown in FIGS. 4 and 5, the groundwater inflow hole 12b is formed in at least one structure in which the electrode rod 13 communicates with the outside through the sensor body 12a so as to be in contact with groundwater.

The electrode insertion hole 12c is a hole into which the electrode rods 13 are respectively inserted and varies depending on the shape of the circular isotope electrode 13.

The electrode insertion hole 12c is formed along the longitudinal direction of the sensor body 12a and the groundwater inflow hole 12b is formed in the width direction of the sensor body 12a, that is, perpendicular to the electrode insertion hole 12c And the electrode insertion hole 12c is formed with an opening portion communicating with the groundwater inflow hole 12b so that the groundwater and the electrode rod 13 are in contact with each other.

The O-ring insertion groove 12d is formed in the shape of a groove opening to the outside along the circumference on the outer peripheral surface of the sensor body body 12a so that the O-ring 18 is inserted (press- As shown in FIG.

The electrode rod 13 is, for example, an electrode for sensing the conductivity of groundwater. A total of four electrode rods are provided. Two electrodes are the input electrode and the remaining two are the output electrode.

The electrode rod 13 is partially inserted into the electrode insertion hole 12c of the sensor body body 12a in the longitudinal direction and is exposed to the groundwater inflow hole 12b through the contact portion and the remaining portion penetrates the sensor mounter 14 And includes an exponent ring 13a that is electrically connected to the substrate portion 20 and prevents groundwater from penetrating the substrate portion 20 through the space between the sensor body 12 and the sensor mounter 14. [

The exponent ring 13a is ring-shaped and has an elastic force while being provided with an inner diameter hole which is in close contact with the circumference of the electrode rod 13, and when the sensor body 12 and the sensor mounter 14 are assembled, So that the groundwater is prevented from penetrating between the outer circumferential surface of the electrode rod 13 and the hole of the sensor mount 14. In this case,

In order to improve the conductivity measurement efficiency, the surface of the electrode rod 13 is plated and plated with a rod made of, for example, copper as a matrix.

In addition to the conductivity sensor, a configuration for sensing the temperature and pressure of the groundwater may be added. To this end, a sensor (or a cable of the sensor) for sensing temperature, pressure, etc. is passed around the electrode insertion hole 12c Holes, and the exponent ring 13a of the electrode rod 13 can be constructed in the same way to prevent penetration of the groundwater. The sensor case 11 is provided at its periphery with a temperature sensor mounting portion 12e on which the temperature sensor 19 is mounted.

The sensor mounter 14 has a structure in which the electrode rods 13 are fixed to the sensor body 12 and the electrode rod insertion holes 12c are the same as the electrode rod insertion holes 12c and are shorter than the sensor body 12, And the groundwater inflow hole 12b is not the same structure as the body body 12.

The sensor mount 14 is assembled with a sensor body 12 and a fastener 14a such as a bolt. For example, a nut groove is provided at the center of the sensor body 14a, And a bolt-type fastener 14a is screwed into the nut groove of the sensor mount 14 through the bolt through-hole of the sensor mount 14 so that the sensor body 12 and the sensor mount 14 are screw- (14) is assembled.

Thus, the sensor body body 12, the electrode rod 13, and the sensor mounter 14 are integrally used through assembly.

The sensor cap 15 is assembled to the front end of the sensor case 11 so that the sensor body 12 can not be moved away from the sensor case 11. For example, So that the sensor cap assembling step 11a of the sensor cap 11 is fitted.

The spacer 16 supports the substrate 21 of the substrate portion 20 with the sensor mounter 14 or the sensor case 11 as a support base, And this space is a space for accommodating a cable connecting the electrode rod 13 and the substrate 21, and can protect the electric wire without disconnection.

The connector 17 is assembled to the rear end of the sensor case 11 and connects the sensor case 11 and the transfer unit 30, that is, the connector 17 is assembled to the connector assembly 11c of the sensor case 11 And a portion to be assembled to the cable housing 31 of the transmission unit 30 is provided at the rear of the sensor housing 11 and the cable housing 31 so that the groundwater can be prevented from penetrating through the space between the sensor housing 11 and the cable housing 31 O-rings can be combined.

Further, the connector 17 is inserted into the board connector.

The O-ring 18 has an inner diameter which is in close contact with the O-ring insertion groove 12d of the sensor body 12 and has an outer diameter larger than the inner diameter of the sensor case 11 so that the sensor body 12 is inserted into the sensor case 11 The sensor body 11 and the sensor body 12 are watertightly formed.

The substrate unit 20 includes a substrate (PCB) 21 on which elements for processing electrical signals received from the input electrode are provided, an electric signal is supplied to the output electrode of the electrode 13, (Not shown).

The substrate 21 is connected to the electrode rod 13 through an electric wire or the like, and the substrate connector 22 is fitted to the substrate 21 in a fitting manner. The board connector 22 is connected to the cable connector 32 of the transfer section 30 and transfers processing information of the board 21 to the cable connector.

In the present invention, for example, as shown in FIG. 6, there are provided a signal generator for generating an electrical signal, an electric signal generated by the signal generator for supplying a constant current to an output electrode A current detection unit for detecting a current value according to a conductivity value received (input) by the input current electrode and converting the detected current value into a voltage, a phase detection control unit for adjusting the phase of the electric signal generated by the signal generation unit and the electric signal converted by the current detection unit, A smoothing circuit section for smoothing the signal controlled by the phase detection control section and converting it into a DC voltage, and a filter section for filtering the signal converted by the smoothing circuit section.

The transmission section 30 is composed of a cable housing 31, a cable connector 32, a cable cap 33, a cable clamp 34 and a cable socket 35.

The cable housing 31 is cylindrical in shape and indirectly assembled through a cable cap 33 that is directly assembled to the connector 17 or assembled to the connector 17. The cable housing 31 has a space in which the cable 40 and the cable connector 32 are connected, Thereby providing a space in which the connector 32 and the board connector 22 are connected.

The cable housing 31 is formed with a step 31a at the front side of the outer circumferential surface thereof for preventing the cable cap 33 from escaping.

The cable housing 31 includes at least one cable support portion 31b for supporting a circumference of the cable 40 so as to secure a space for allowing a flexible connection between the cable 40 and the cable connector 32, .

The cable supporting portion 31b is formed in a ring shape on the inner circumferential surface of the cable housing 31 so that the cable 40 is fitted.

When the cable housing 31 is made of a material having an elastic force, the cable support portion 31b has an elastic force and is brought into close contact with the outer circumferential surface of the cable 40 to ensure watertightness and to prevent penetration of groundwater into the cable socket 35 side .

Since the covering of the cable 40 has an elastic force, the cable supporting portion 31b and the cable 40 are closely contacted to secure water tightness even if the cable supporting portion 31b does not have an elastic force.

The cable connector 32 is fixedly coupled to the cable housing 31 and electrically connected to the board connector 22 (for example, by a connection rod and a connection groove), and the cable 40 is connected to the board connector 22, And the cable 40 are connected to each other.

The cable cap 33 is connected to the periphery of the cable housing 31 and is fitted into the connector 17 to protect the connection between the board connector 22 and the cable connector 32.

The cable cap 33 can be slidably connected to the periphery of the cable housing 31 and a rim 33a is formed on the inner circumferential surface of the cable cap 31 so as to engage with the rim 31a of the cable housing 31.

The cable clamp 34 has a structure in which a tapered portion (a tapered portion and a straight portion) is formed on the outer circumferential surface so as to be wedge-connected to the cable housing 31 while the hole for inserting the cable 40 is provided. 40 and the cable housing 31 in a wedge-like manner.

For example, the cable clamp 34 is wedge-coupled while being compressed when coupling the cable socket 35 to the cable housing 31 to prevent the cable 40 from being pulled out of the cable housing 31.

The cable socket 35 includes a hole through which the cable 40 penetrates and includes an insertion portion 35a inserted into the cable housing 31 and supports the cable 40 from outside the cable housing 31 Cable support.

One end of the cable 40 is passed through the cable socket 35 and the cable clamp 34 and is wired into the cable housing 31. The cable with the cover removed is connected to the cable connector 32, Monitoring is connected to the main body.

According to the present invention, the sensor unit 10 is constructed in a prefabricated manner through the structural features and the coupling relationship of the respective components. When the sensor unit 10 needs to be repaired due to the defect of the electrode 13, The sensor unit 14 and the sensor cap 14 are detached from the sensor unit 10 by separating the sensor unit 10 from the sensor unit 12, 15, etc.) can be separated. Therefore, it is possible to replace only the parts requiring replacement, and both the assembly and the disassembly are possible by hand.

The electrode rod 13 is installed in contact with the groundwater in the groundwater inflow hole 12b to measure the conductivity of the groundwater and the groundwater flows into the sensor body 12 and flows along the circumference of the electrode rod 13, 13a secure the watertightness between the sensor body 12 and the sensor mounter 14 and can not penetrate the inside of the exponent ring 13a.

The sensor clamp 34 ensures water tightness between the cable 40 and the cable body 31 even if the groundwater flows into the sensor socket 35 on the outer circumferential surface of the cable 40 behind the sensor Block groundwater infiltration.

In this manner, the sensor unit 10 secures the watertightness in front of the sensor and the sensor clamp 34 secures the watertightness at the rear, thereby protecting the sensor from penetration of groundwater.

In addition, since the O-ring secures water tightness in the assembled portion of the sensor case 11, the connector 17, and the cable cap 33, the sensor is protected from the ground water as a whole.

The description of the sensor body 12, the sensor mounter 14, the electrode rod 13 and the exponent ring 13a of the sensor unit 10, the description of the cable housing 31, the cable socket 35, The technique of the cable clamp 34 can be used alone.

10: Sensor part,
11: Sensor case, 12: Sensor body
13: Electrode, 14: Sensor mounter
15: sensor cap, 16: spacer
17: Connector,
20: substrate portion,
21: substrate, 22: board connector
30:
31: cable housing, 32: cable connector
33: Cable cap, 34: Cable clamp
35: Cable socket,
40: Cable,

Claims (9)

A sensor unit 10 for sensing information of the groundwater in contact with the groundwater;
A substrate unit 20 on which an element for processing information of groundwater sensed by the sensor unit is mounted;
A transfer unit (30) for transferring information processed by the elements of the substrate unit;
And a cable (40) connected to the transmission unit to transmit information of groundwater to a monitoring body,
The sensor unit includes a tubular sensor case 11, a sensor cap 15 accommodated in the sensor case from the front side, a sensor body 12, a sensor mounter 14, A spacer 16, an electrode rod 13 assembled by the sensor body and the sensor mount and inputting / outputting an electric signal, an O-ring 18 coupled to the periphery of the sensor body and closely attached to the inner surface of the sensor case, A connector (17) for connecting the sensor case to the transmission unit, and an exponent ring (13a) coupled to the periphery of the electrode rod and securing water tightness while being elastically deformed when the sensor body and the sensor mount are assembled,
The sensor case includes a sensor cap assembling step 11a formed at the tip end thereof for fitting the sensor cap into the sensor cap, a seating step 11b formed between the front end and the rear end and fixed to the sensor mounter, And a connector assembly portion (11c) formed to have a tapered cross section with an increased inner diameter and to which the connector (17) is assembled,
The sensor body includes a sensor body body 12a having a tubular structure, a groundwater inflow hole 12b formed in the body of the sensor body so as to communicate with the outside and inside of the sensor body body along the width direction, A plurality of electrode insertion holes 12c formed to have openings communicating with the holes and into which the electrode rod 13 is inserted, a contact portion formed in the electrode insertion hole to communicate with the groundwater inflow hole, And an O-ring insertion groove (12d) formed along the circumferential surface of the sensor body body (12a)
The sensor mount includes a hole through which the electrode rod passes and is assembled through a fastener fastened to a nut groove of the sensor body body 12a. The sensor mount elastically deforms the exponent ring to tightly adhere to the circumference of the electrode rod,
Wherein the spacer supports the substrate of the substrate portion with the sensor mount as a support base and secures a predetermined space for receiving electric wires between the electrode rod and the substrate,
Wherein the substrate portion includes a substrate (21) inserted into the sensor case and connected to the electrode rod, and a substrate connector (22) connected to the substrate,
The transmission unit includes a cable housing 31 assembled to the connector 17, a cable connector 32 connected to the board connector and coupled to the cable housing, A cable clamp 33 which is formed in a ring shape and is coupled to the periphery of the cable and press-fitted into the cable housing in a wedge-like manner to ensure water tightness, And a cable socket (35) assembled to the rear of the groundwater monitoring sensor. delete delete delete delete The groundwater monitoring sensor according to claim 1, wherein the electrode is plated. delete The groundwater monitoring sensor according to claim 1, further comprising a temperature sensor mounted on the sensor body and sensing a temperature of the groundwater. [Claim 2] The apparatus according to claim 1, wherein the substrate portion comprises: a signal generating portion generating an electrical signal; a constant current circuit portion supplying an electrical signal generated by the signal generating portion to an output electrode (electrode rod) A phase detection control unit for matching the phase of the electrical signal generated by the signal generation unit with the electrical signal converted by the current detection unit, and a control unit for converting the signal controlled by the phase detection control unit to a DC voltage And a filter unit for filtering the signal converted by the smoothing circuit unit and the smoothing circuit unit.

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