Ground Resistance Tester and Remote Electrical Signal Monitoring Device

Abstract

The present invention relates to a ground resistance measuring device. One embodiment includes a measuring device, device, etc. capable of measuring the ground resistance of ground equipment and remotely monitoring electrical signals such as resistance. A ground resistance measuring device according to an embodiment of the present invention comprises: a first sensing unit including a first sensor member, a first bracket surrounding the first sensor member, and a guide member; a second sensing unit including a second sensor member that measures resistance together with the first sensor member, a second bracket surrounding the second sensor member, and a sliding member arranged to move along the guide member; and an operating unit that transmits force to the sliding member to cause the sliding member to move along the guide member.

Description

Technology Field

[0001] The present invention relates to a ground resistance measuring device. One embodiment includes a measuring device, device, etc. capable of measuring the ground resistance of ground equipment and remotely monitoring electrical signals such as resistance. Background Technology

[0002] In general, grounding wires are essential for ground equipment, such as transformers, switchgear, and distribution boxes, to effectively discharge current to the earth in the event of a lightning strike or ground fault; safety is ensured only if the grounding resistance of these wires is maintained below a certain standard.

[0003] However, the grounding wires of such ground equipment are often installed in narrow and difficult-to-access locations, such as at the bottom of the equipment, near a wall, or inside the equipment, which has the problem that measuring the resistance value of the grounding wire is very cumbersome and dangerous.

[0004] Conventionally, it was common practice to use a clamp-type grounding resistance meter or similar device, where the user directly inserts their hand deep inside to connect the sensor to the grounding wire, applies an induced current, and measures the generated voltage. However, this method has problems such as delays in work and inaccurate measurements because the measuring device itself is large or the sensor's opening and closing structure is complex, making it difficult to install in confined spaces. Additionally, since the worker must insert their hand inside the device, there is a risk of safety accidents such as electric shock, abrasions, and equipment damage. Prior art literature

[0005] Korean Registered Patent Publication No. 10-0674246 The problem to be solved

[0006] The present invention aims to provide a ground resistance measuring instrument capable of precisely measuring ground resistance even in confined spaces.

[0007] In addition, the present invention can reduce the risk of electric shock to workers and make the grounding resistance measurement work more convenient.

[0008] In addition, since the sensor part is secured by a sliding mechanism, mechanical wear caused by friction or impact is reduced, which improves the durability of the measuring instrument and extends its lifespan. means of solving the problem

[0009] A ground resistance measuring device according to an embodiment of the present invention comprises: a first sensing unit including a first sensor member, a first bracket surrounding the first sensor member, and a guide member; a second sensing unit including a second sensor member that measures resistance together with the first sensor member, a second bracket surrounding the second sensor member, and a sliding member arranged to move along the guide member; and an operating unit that transmits force to the sliding member to cause the sliding member to move along the guide member.

[0010] The second bracket is pushed and moved from one side of the first bracket to the other side as the sliding member moves along the guide member.

[0011] The guide member includes a path providing means for providing a movement path of the sliding member, and the path providing means may include a first section formed in a forward-backward direction with respect to the first bracket, and a second section formed inclined from the first section.

[0012] When the sliding member moves along the first section, the second bracket moves forward relative to the first bracket, so that the second sensor member can be placed on the first sensor member.

[0013] When the sliding member moves along the second section, the second bracket can move downward relative to the first bracket so that the first sensor member and the second sensor member come into contact with each other.

[0014] The second sensing unit may further include a connecting member that transmits the force of the operating unit to the second bracket.

[0015] The above connecting member is hinge-connected to the rear of the second bracket, so that even if the angle formed by the second bracket with respect to the first bracket changes, the direction of the force provided by the operating part can be maintained in the front-back direction.

[0016] The above sliding member may include a sliding bracket, a first slider positioned at the front of the sliding bracket and moving along the guide member, and a second slider positioned at the rear of the sliding bracket and moving along the guide member.

[0017] The first slider is positioned below the second slider, so that when the first slider and the second slider move along the first section, the front of the second bracket is lifted higher than the rear, allowing the second sensor member to move back and forth without touching the first sensor member, and when the first slider moves along the second section and the second slider moves along the first section, the front of the second bracket is lowered, allowing the second sensor member to come into contact with the first sensor member. Effects of the invention

[0018] A ground resistance measuring device according to an embodiment of the present invention can precisely measure ground resistance even in a confined space.

[0019] In addition, the present invention can reduce the risk of electric shock to workers and make the grounding resistance measurement work more convenient.

[0020] In addition, since the sensor part is secured by a sliding mechanism, mechanical wear caused by friction or impact is reduced, which improves the durability of the measuring instrument and extends its lifespan. Brief explanation of the drawing

[0021] FIGS. 1 and FIGS. 2 illustrate a ground resistance measuring device according to an embodiment of the present invention, showing the closed state and the open state, respectively. Figure 3 is a partial enlarged view of Figure 1. Figure 4 is a partial enlarged view of Figure 2. Figure 5 illustrates the first sensing unit. Figure 6 illustrates the second sensing unit. Specific details for implementing the invention

[0022] Preferred embodiments of the present invention are described below with reference to the attached drawings. However, embodiments of the present invention may be modified in various different forms, and the scope of the present invention is not limited to the embodiments described below. Furthermore, embodiments of the present invention are provided to more completely explain the present invention to those with average knowledge in the art. Accordingly, the shapes and sizes of elements in the drawings may be exaggerated for clearer explanation, and elements indicated by the same reference numeral in the drawings are the same elements. Also, the same reference numeral is used throughout the drawings for parts having similar functions and operations. Additionally, throughout the specification, the term "comprising" a component means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. In the present invention, directions such as "front," "back," "up," "down," "left," and "right" may be based on any arbitrary standard; in one embodiment, "up" refers to the z-axis direction of the drawing, "front" refers to the x-axis direction, and the remaining directions may be specified based on these.

[0024] FIGS. 1 and 2 illustrate a ground resistance measuring device (100) according to an embodiment of the present invention, respectively in a closed state and an open state. Referring to FIGS. 1 and 2, the ground resistance measuring device (100) according to an embodiment of the present invention comprises: a first sensing unit (110) including a first sensor member (112), a first bracket (111) surrounding the first sensor member (112), and a guide member (113); and a second sensing unit (120) including a second sensor member (122) that measures resistance together with the first sensor member (112), a second bracket (121) surrounding the second sensor member (122), and a sliding member (123) arranged to move along the guide member (113). and an operating unit (140) that transmits force to the sliding member (123) so that the sliding member (123) moves along the guide member (113). One embodiment may further include components such as a control unit that receives and calculates electrical signals measured by the first sensor member (112) and the second sensor member (122), and a power supply unit that supplies power to the first sensor member (112) and the second sensor member (122).

[0025] The ground resistance measuring device (100) can be in a closed state (Fig. 1) in which the first sensor member (112) and the second sensor member (122) are arranged to form a closed loop as the second sensing unit (120) moves along the first sensing unit (110), and in an open state (Fig. 2) in which one end of the first sensor member (112) and one end of the second sensor member (122) are arranged to form an open loop apart from each other.

[0027] The first sensing unit (110) performs functions such as providing an accurate reference position, maintaining alignment between sensors, and ensuring measurement stability in response to the movement of the second sensing unit (120). The first sensing unit (110) includes a first bracket (111), a first sensor member (112), and a guide member (113).

[0029] The first bracket (111) is a component that mechanically supports and protects the first sensor member (112) and the guide member (113). One end can be connected to and fixed to the support (131), allowing for accurate measurement even from a distance. Additionally, the first bracket (111) provides a sensor alignment standard so that the second sensing part (120) makes accurate contact along a predetermined path.

[0030] Referring to FIG. 3, the first bracket (111) can be divided into a first part where the first sensor member (112) is placed and a second part connected to the support (131). The first part may have a shape corresponding to the shape of the first sensor member (112), and in one embodiment, it may be a 'C' or 'U' shape that is open upward. The part protruding upward may be placed on the side of the second bracket (121) to perform the function of preventing the second bracket (121) from coming off when sliding. One end of the second part is connected to the first part and extended therefrom so that the guide member (113) and the sliding member (123) are placed on the upper side, and the other end is connected to the support (131) and fixed.

[0032] The first sensor member (112) is a sensor element that detects an induced voltage for measuring ground resistance and forms a loop structure together with the second sensor member (122) included in the second sensing unit (120). Through this, an electrical signal (e.g., induced voltage) generated from a wire placed in the center of a circular structure can be measured. That is, the second sensor member (122) forms a structure that wraps around a wire (e.g., ground wire) while in close proximity to or in contact with the first sensor member (112) through sliding, thereby forming an effective closed-loop magnetic flux path between the sensors, which allows the induced voltage to be detected stably.

[0033] The first sensor member (112) is formed in a partial loop shape, and a closed loop can be formed only when the second sensor member (122) is physically in contact. The first sensor member (112) may be positioned so that one end is open to the outside and the side is covered by an insulator (such as the first bracket (111) or an insulating covering that separately surrounds the first sensor member (112)). In one embodiment, the other end may be open (see FIG. 5), and in another embodiment, one end may be open and electrically connected to the second sensor member (122). In the closed state, one end of the first sensor member (112) and one end of the second sensor member (122) may be electrically connected to each other to form a closed loop circuit (in one embodiment, the other end of the first sensor member (112) and the other end of the second sensor member (122) are also electrically connected in the closed state).

[0034] The first sensor member (112) and the second sensor member (122) may have a shape (such as an 'O' or 'M' shape) for measuring the induced voltage of the wire in a closed state. Referring to FIG. 3, the first sensor member (112) has a 'U' or 'C' shape, and accordingly, one end portion of the first bracket (111) also has the same shape. However, in other embodiments, the first sensor member (112) may have an 'L' or 'U' shape, and in this case, the second sensor member (122) may have an 'L' or 'C' shape. The most preferred embodiment is the shape of FIG. 3, which facilitates the implementation of a sliding motion.

[0035] The first sensor member (112) may be formed by overlapping one or more wires, plates, or beams made of metal or alloy material.

[0037] The guide member (113) is configured to guide the path along which the sliding member (123) of the second sensing unit (120) moves, and is coupled to or integrally formed with the first bracket (111). Referring to FIG. 3, the guide member (113) is positioned above the second part of the first bracket (111) so that the second bracket (121) can move back and forth above the first bracket (111) without interference.

[0038] The guide member (113) may include a path-providing means. The path-providing means is a component that provides a path for the sliding member (123) of the second sensing unit (120) to move along, and may be of various forms provided for path provision in the field, such as rails or grooves. Referring to FIG. 5, the path-providing means may be a groove that is placed on the outer and / or right side of the guide member (113) and is cut inward. The path-providing means may include a first section formed in a forward-backward direction with respect to the first bracket (111), and a second section formed at an angle from the first section. In FIG. 4 and FIG. 5, the first section is a straight section extending from one side (the rear of the guide member (113)) to the other side (the front of the guide member (113)), and the second section may be formed at an angle of 5 to 10 degrees downward from the first section. The angle of inclination of the second section is based on the surface where the first sensor member (112) and the second sensor member (122) come into contact. This can solve the problem of damage to the surface where the first sensor member (112) and the second sensor member (122) come into contact. When the second bracket (121) slides to move from a closed state to an open state, the surface where the first sensor member (112) and the second sensor member (122) come into contact may be scraped and damaged. The present invention solves this problem by configuring the sliding member (123) to move in an upwardly inclined direction along the second section, thereby causing the second sensor member (122) to fall upward from the first sensor member (112).

[0039] Additionally, the first section may be positioned at a certain angle with respect to the surface where the first sensor member (112) and the second sensor member (122) come into contact. As previously described, the sliding member (123) moves upward and backward along the second section, and then moves backward along the first section. At this time, the first section may be formed to be inclined downward as it moves backward. The degree of inclination of the first section may be 1 to 5 degrees, preferably 3 degrees, and the angle of inclination of the first section is based on the surface where the first sensor member (112) and the second sensor member (122) come into contact.

[0040] To explain again, the sliding member (123) starts from the rear of the first section and moves along the slope toward the front and upward, and then moves along the slope toward the front and downward as it enters the second section.

[0042] The second sensing unit (120) is a movable sensor unit for measuring the grounding resistance of a wire together with the first sensing unit (110), and includes a second sensor member (122), a second bracket (121), and a sliding member (123). In one embodiment, the second sensing unit (120) may further include a connecting member (124) and / or a return means. The second sensing unit (120) slides along the guide member (113) according to the force transmitted from the operating unit (140) and performs the function of forming or releasing an induced voltage measurement loop depending on whether it is in contact with the first sensor member (112).

[0044] The second bracket (121) is a component that mechanically supports and protects the second sensor member (122), the sliding member (123), and the connecting member (124). The second bracket (121) surrounds the second sensor member (122) and moves together with the sliding member (123) as it moves along the guide member (113), thereby allowing the second sensor member (122) to make stable contact with the first sensor member (112).

[0045] Referring to FIGS. 3 and 4, the second bracket (121) can be divided into a first part where the second sensor member (122) is placed and a second part where the sliding member (123) and the connecting member (124) are placed. The first part may have a shape corresponding to the second sensor member (122), and in one embodiment, it may be a straight line shape, a U-shape, or an L-shape. At least one side of the first part of the second bracket (121) is placed between the protruding parts of the first bracket (111), thereby enabling more stable operation.

[0047] The second sensor member (122) is a sensor element that detects an induced voltage for measuring ground resistance and forms a loop structure together with the first sensor member (112) included in the first sensing unit (110). Through this, an electrical signal (e.g., induced voltage) generated from a wire placed in the center of a circular structure can be measured. That is, the second sensor member (122) forms a structure that wraps around a wire (e.g., ground wire) while in close proximity to or in contact with the first sensor member (112) through sliding, and accordingly, an effective closed-loop magnetic flux path is formed between the sensors, thereby allowing the induced voltage to be detected stably.

[0048] The second sensor member (122) is formed in a partial loop shape, and a closed loop can be formed only when the first sensor member (112) is physically in contact. The second sensor member (122) may be positioned so that one end is open to the outside and the side is covered by an insulator (such as the second bracket (121) or an insulating covering that separately surrounds the second sensor member (122)). In one embodiment, the other end may be open, and in another embodiment, one end may be open and the other end may be electrically connected to the first sensor member (112). In the closed state, one end of the first sensor member (112) and one end of the second sensor member (122) may be electrically connected to each other to form a closed loop circuit (in one embodiment, the other end of the first sensor member (112) and the other end of the second sensor member (122) are also electrically connected in the closed state).

[0049] The second sensor member (122) may be formed by overlapping one or more wires, plates, or beams made of metal or alloy material.

[0051] The sliding member (123) moves the entire second sensing unit (120) along the guide member (113). The sliding member (123) may include a sliding bracket (123a), a first slider (123b) positioned in front of the sliding bracket (123a) and moving along the guide member (113), and a second slider (123c) positioned behind the sliding bracket (123a) and moving along the guide member (113).

[0052] The sliding bracket (123a) fixes and supports the first slider (123b) and the second slider (123c). The upper part of the sliding bracket (123a) is fixed to the second bracket (121), and the first slider (123b) and the second slider (123c) are fixed to the lower part. The sliding bracket (123a) can be fixed to both sides of the second bracket (121) to correspond to the path providing means arranged on both sides of the first bracket (111).

[0053] The first slider (123b) and the second slider (123c) are means for moving along a path-providing means. The first slider (123b) and the second slider (123c) are not specifically limited as long as they can move in correspondence with the path-providing means. If the path-providing means is a groove, a rail, etc., the first slider (123b) and the second slider (123c) may be means such as a protrusion, a bearing, a roller, etc., and if the path-providing means is a protrusion, a bearing, a roller, etc., the first slider (123b) and the second slider (123c) may be a groove, a rail, etc. Referring to FIG. 6, the first slider (123b) and the second slider (123c) may be bearings.

[0054] The first slider (123b) and the second slider (123c) may be positioned apart at the front and rear of the sliding bracket (123a), respectively. The distance between the first slider (123b) and the second slider (123c) may be longer than the length of the second section of the path providing means. In this case, when the second sensing unit (120) is located at the rear (open state), the first slider (123b) and the second slider (123c) may be located in the first section of the path providing means, and when the second sensing unit (120) is located at the front (closed state), the first slider (123b) may be located in the first section and the second slider (123c) may be located in the second section. When transitioning from the open state to the closed state, the second slider (123c) moves along the first section and then enters the second section, allowing the second sensor member (122) to move rapidly downward. At this time, it exhibits a movement that appears as if it is rotating downward with the first slider (123b) as an axis, so that the second sensor member (122) and the first sensor member (112) can make more accurate and stable contact. The first slider (123b) is positioned lower than the second slider (123c), so that when the first slider (123b) and the second slider (123c) move along the first section, the front of the second bracket (121) moves upward above the rear, thereby allowing the second sensor member (122) to move back and forth without touching the first sensor member (112). When the first slider (123b) moves along the second section and the second slider (123c) moves along the first section, the front of the second bracket (121) moves downward, thereby allowing the second sensor member (122) to come into contact with the first sensor member (112).

[0056] The connecting member (124) effectively transmits the force transmitted from the operating part (140) to the second bracket (121). The connecting member (124) is positioned at the rear of the second bracket (121) (the rear of the second part), and one end of the force transmission member (142) is fixed thereto. The force of the force transmission member (142) is transmitted to the second bracket (121), so that when the force transmission member (142) is pulled, the second bracket (121) moves backward. The connecting member (124) can be hinge-coupled to the second bracket (121). This allows the connecting member (124) to rotate, thereby ensuring that the direction of force transmission is always aligned with the direction of movement (rear) of the second bracket (121) even while the second sensing part (120) is moving. As the second sensing unit (120) moves backward, the direction of the force being pulled by the force transmission member (142) becomes steeper and steeper. By arranging the connecting member (124) so ​​as to be rotatable with respect to the second bracket (121), it is possible to respond appropriately to this change in the direction of the force.

[0058] The return means is a means for moving the second sensing unit (120), which has moved to the rear, back to the front. That is, the return means causes the second sensing unit (120), which is in an open state by the operating unit (140), to become a closed state. In this case, the closed state is the default state of the present invention, and the operator can switch to an open state by operating the operating unit (140). The return means is not particularly limited as long as it is capable of applying force to move the second bracket (121) forward. In one embodiment, the return means may be a spring, and one end may be fixed to the lower part of the first part of the second bracket (121), and the other end may be fixed to the upper part of the first bracket (111).

[0060] The support member (130) supports the mechanical structure of the entire measuring instrument and is configured to fix and maintain the first sensing member (110) and the operating member (140) so that sliding and sensing operations can be performed stably during operation, and includes a support member (131) and a fixing member (132).

[0061] The support member (131) is a rod-shaped member formed by connecting one end to the first bracket (111) of the first sensing unit (110) and extending, and serves to form a reference axis for major components such as the guide member (113), sliding member (123), and operating unit (140) in the overall structure. Through this, ground resistance in a place out of reach of the operator's hand can be measured.

[0062] The fixing member (132) performs the function of fixing the lever member (141) of the operating part (140) to a specific position. As previously described, the second sensing part (120) is continuously subjected to a force that returns it to a closed state by means of a return means. After the operator pulls the lever member (141) of the operating part (140) to open it, the lever member (141) can be fixed using the fixing member (132) to maintain this state. The fixing member (132) may be a means such as a hook, a latch, or a stopper, and may be positioned on the other end of the support (131).

[0064] The operating unit (140) enables the sliding movement of the second sensing unit (120) to be operated externally and allows for easy measurement of ground resistance even in a confined space. The operating unit (140) includes a force transmission member (142) and a lever member (141).

[0065] The force transmission member (142) transmits the force generated in the operating part (140) to the second sensing part (120) to induce sliding movement. The force transmission member (142) may be a tensionable member such as a line, wire, or cable. One end is fixed to the connecting member (124) of the second sensing part (120), and the other end is connected to the lever member (141), and may be arranged along the support (131).

[0066] The lever member (141) is an operating handle operated by the user's hand and is coupled to the other end of the force transmission member (142). After the operator pulls the lever member (141) to open the state, the lever member (141) can be placed on the fixing member (132) to maintain the open state. The lever member (141) may have a shape that is easy for the operator to pull and can be fixed to the fixing member (132), and in one embodiment, it may be a ring shape.

[0068] One embodiment may further include a monitoring member capable of remotely measuring ground resistance. The monitoring member may include a wireless communication unit, a transmission and reception module, a display means, etc., to transmit the ground resistance value or induced voltage value measured through the first sensor member (112) and the second sensor member (122) to a control unit and to allow real-time verification of the value on an external device or user terminal.

[0069] The monitoring unit is connected to the control unit via wired or wireless communication and may include functions for transmitting, storing, or analyzing measured data to a server. Additionally, it can be linked with a user terminal (e.g., smartphone, tablet, etc.) to monitor data such as the location, status, and ground resistance value of the measuring instrument in real time.

[0071] The present invention is not limited by the embodiments described above and the attached drawings, but is intended to be limited by the appended claims. Accordingly, various substitutions, modifications, and changes may be made by those skilled in the art within the scope of the technical concept of the present invention as described in the claims, without departing from the technical spirit of the invention, and such are also to be considered to fall within the scope of the present invention. Explanation of the symbols

[0072] 100: Ground resistance meter, 110: First sensing unit, 111: First bracket, 112: First sensor member, 113: Guide member, 120: Second sensing unit, 121: Second bracket, 122: Second sensor member, 123: Sliding member, 123a: Sliding bracket, 123b: First slider, 123c: Second slider, 124: Connecting member, 130: Support unit, 131: Support stand, 132: Fixing member, 140: Actuating unit, 141: Lever member, 142: Force transmission member

Claims

Claim 1 delete Claim 2 delete Claim 3 delete Claim 4 A first sensing unit comprising a first sensor member, a first bracket surrounding the first sensor member, and a guide member disposed behind the first sensor member; a second sensing unit comprising a second sensor member that contacts the first sensor member to form a closed-loop magnetic flux path and measures resistance, a second bracket surrounding the second sensor member, and a sliding member disposed to move along the guide member; and an operating member that transmits force to the sliding member so that the sliding member moves along the guide member; wherein the second bracket moves by being pushed from the rear to the front of the first bracket as the sliding member moves along the guide member, and the guide member includes a path providing means that provides a movement path of the sliding member, and the path providing means includes a first section formed from the rear to the front with respect to the first bracket, and a second section formed inclined from the first section, and when the sliding member moves along the first section, the second bracket moves forward with respect to the first bracket so that the second sensor member is placed on the first sensor member, and when the sliding member moves along the second section, the second bracket moves downward with respect to the first bracket so that the first sensor member and the second sensor member are placed in contact with each other, and the second sensing member further includes a connecting member that transmits the force of the operating member to the second bracket, and the connecting member A ground resistance measuring instrument that is hinge-connected to the rear of the second bracket, such that even if the angle formed by the second bracket with respect to the first bracket changes, the direction of the force provided by the operating part maintains the front-back direction. Claim 5 A first sensing unit comprising a first sensor member, a first bracket surrounding the first sensor member, and a guide member disposed behind the first sensor member; a second sensing unit comprising a second sensor member that contacts the first sensor member to form a closed-loop magnetic flux path and measures resistance, a second bracket surrounding the second sensor member, and a sliding member disposed to move along the guide member; and an operating part that transmits force to the sliding member so that the sliding member moves along the guide member; wherein the second bracket moves by being pushed from the rear to the front of the first bracket as the sliding member moves along the guide member, and the guide member includes a path providing means that provides a movement path of the sliding member, and the path providing means includes a first section formed from the rear to the front with respect to the first bracket, and a second section formed inclined from the first section, and the sliding member includes a sliding bracket, a first slider disposed in front of the sliding bracket and moving along the guide member, and a second slider disposed behind the sliding bracket and moving along the guide member, and the first slider is disposed below the second slider, so that when the first slider and the second slider move along the first section, the front of the second bracket is lifted higher than the rear and moves, thereby the second sensor member is the A ground resistance measuring device capable of moving back and forth without touching the first sensor member, wherein when the first slider moves along the second section and the second slider moves along the first section, the front of the second bracket comes down, thereby causing the second sensor member to come into contact with the first sensor member.

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