KR102584723B1 - Live-wire detection wearable device - Google Patents

Abstract

The present invention proposes a wearable device that can detect whether the cable that the operator wants to cut is live. The wearable device includes a geomagnetic sensor that detects a magnetic field transmitted from a cable through an antenna placed at a preset position on the palm surface of the glove body worn on the worker's hand, and a geomagnetic sensor detected by the geomagnetic sensor. An amplifier that amplifies a magnetic field, a warning unit that outputs at least one warning signal among light, sound, and vibration when the cable is determined to be live, and a determination of whether the cable is live based on the magnetic field amplified by the amplifier. And, when the cable is determined to be in a live state, it may include a control unit that outputs a warning signal through the warning unit.

Description

Live-wire detection wearable device {Live-wire detection wearable device}

The present invention relates to industrial safety. More specifically, it relates to a wearable device that can detect whether the cable on which the operator wishes to cut is live-wire or hot-line.

Cable (electric wire) is a general term for lines used to transmit power or electrical signals. Generally, cables can be divided into bare cables and insulated cables. Among these, bare wire is a cable without insulation covering on the conductor, and is used for special high-voltage transmission cables or trolley lines. An insulated wire is a cable with an insulating coating on the conductor to prevent electricity from leaking to the outside, and is widely used in indoor facilities. Additionally, the conductor constituting the cable may be made of copper or copper with low electrical resistance, and the insulated coat may be made of rubber, polyethylene, etc.

On the other hand, when installing new electrical equipment, repairing or removing existing electrical equipment, installing new cables to power the new electrical equipment, replacing existing cables to power the existing electrical equipment, or Removal work must also be performed. In this case, before performing cable installation, replacement, or removal work, it is necessary to preemptively inspect whether the cable being worked on is energized (i.e., live) for the safety of workers or electrical equipment. It must be done.

However, there were problems with safety accidents occurring due to reasons such as non-compliance with management and operation regulations (SOP, Standard Operating Procedure), operator misjudgment, and cable misdirection cutting.

To solve this problem, electroscopes have been developed recently to check whether the cable being worked on is live. However, research is being conducted to minimize human and material damage by zeroing the probability of an accident occurring. is needed.

Republic of Korea Patent Publication No. 10-2011-0041042, “Non-contact safety electroscope”, (published on April 21, 2011)

One object of the present invention is to provide a wearable device that can detect whether the cable on which the operator wishes to cut is a live wire.

The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

In order to achieve the technical problems described above, the present invention proposes a wearable device that can detect whether the cable that the operator wants to cut is live. The wearable device includes a geomagnetic sensor that detects a magnetic field transmitted from a cable through an antenna placed at a preset position on the palm surface of the glove body worn on the worker's hand, and a geomagnetic sensor detected by the geomagnetic sensor. An amplifier that amplifies a magnetic field, a warning unit that outputs at least one warning signal among light, sound, and vibration when the cable is determined to be live, and a determination of whether the cable is live based on the magnetic field amplified by the amplifier. And, when the cable is determined to be in a live state, it may include a control unit that outputs a warning signal through the warning unit.

Specifically, the geomagnetic sensor includes a first antenna and a second antenna disposed at the ends of different fingers, and the ends of the fingers are positioned at different points of the cable when the worker grips the cable. It is characterized by,

When magnetic force is detected by the geomagnetic sensor, the control unit first determines that the cable is in a live state, and determines a pair of the magnitude value of the magnetic force detected by the geomagnetic sensor and the amplification multiple value of the magnetic force amplified by the amplifier. It is characterized by matching to a previously prepared verification table and verifying whether the first decision is accurate based on the value matched from the verification table.

When the difference between the magnitudes of magnetic force detected by the first antenna and the second antenna is greater than a preset value, the control unit determines that the cable initially determined to be in a live state is in a non-live state. .

The control unit is characterized in that it recognizes the tension (tension) acting on a plurality of connection lines that electrically connect the first antenna and the second antenna to the control unit, respectively, by the movement of the operator's fingers.

The control unit is characterized in that it determines that the worker has gripped the cable when the difference in tension recognized from each of the plurality of connection lines is within a preset value.

The control unit recognizes the worker's grip posture according to the tension recognized from the plurality of connection lines, and when the worker's grip posture is recognized, compares the magnetic force detected from each of the first antenna and the second antenna, and When the difference between the magnitudes of magnetic force detected by the first antenna and the second antenna is greater than a preset value, the cable initially determined to be in a live state is determined to be in a non-live state.

The control unit estimates the thickness of the cable based on tension recognized from each of the plurality of connection lines, and adjusts the amplification ratio of the amplifier according to the estimated thickness of the cable.

The control unit is characterized in that it determines that the cable is in a live state when the magnitude of the magnetic force increases from the time when the magnetic field is first detected to the time when the magnetic field becomes constant.

The control unit outputs a first warning signal through the warning unit when a magnetic field is detected from the geomagnetic sensor, and after verifying the live wire state, outputs a second warning signal different from the first warning signal. It is characterized by variable output of the pitch of the sound output in proportion to the intensity.

Specific details of other embodiments are included in the detailed description and drawings.

According to embodiments of the present invention, a worker cutting a cable can immediately check whether the cable to be cut is a live wire by holding the cable.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

Figure 1 is a diagram showing the external configuration of a wearable device for detecting live wires according to an embodiment of the present invention.
Figure 2 is a diagram for explaining the operating state of a wearable device for detecting live wires according to an embodiment of the present invention.
Figure 3 is a configuration diagram of a controller according to an embodiment of the present invention.
Figures 4 and 5 are exemplary diagrams for explaining the operation of a wearable device for detecting live wires according to an embodiment of the present invention.

It should be noted that the technical terms used in this specification are only used to describe specific embodiments and are not intended to limit the present invention. In addition, the technical terms used in this specification, unless specifically defined in a different way in this specification, should be interpreted as meanings generally understood by those skilled in the art in the technical field to which the present invention pertains, and are not overly comprehensive. It should not be interpreted in a literal or excessively reduced sense. Additionally, if the technical terms used in this specification are incorrect technical terms that do not accurately express the spirit of the present invention, they should be replaced with technical terms that can be correctly understood by those skilled in the art. In addition, general terms used in the present invention should be interpreted according to the definition in the dictionary or according to the context, and should not be interpreted in an excessively reduced sense.

Additionally, as used herein, singular expressions include plural expressions, unless the context clearly dictates otherwise. In this application, terms such as “consists of” or “have” should not be construed as necessarily including all of the various components or steps described in the specification, and only some of the components or steps are included. It may not be possible, or it should be interpreted as including additional components or steps.

Additionally, terms including ordinal numbers, such as first, second, etc., used in this specification may be used to describe various components, but the components should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, a first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component without departing from the scope of the present invention.

When a component is referred to as being “connected” or “connected” to another component, it may be directly connected to or connected to the other component, but other components may also exist in between. On the other hand, when it is mentioned that a component is “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the attached drawings. However, identical or similar components will be assigned the same reference numbers regardless of the reference numerals, and duplicate descriptions thereof will be omitted. Additionally, when describing the present invention, if it is determined that a detailed description of related known technologies may obscure the gist of the present invention, the detailed description will be omitted. In addition, it should be noted that the attached drawings are only intended to facilitate easy understanding of the spirit of the present invention, and should not be construed as limiting the spirit of the present invention by the attached drawings. The spirit of the present invention should be construed as extending to all changes, equivalents, or substitutes other than the attached drawings.

On the other hand, when installing new electrical equipment, repairing or removing existing electrical equipment, installing new cables to power the new electrical equipment, replacing existing cables to power the existing electrical equipment, or Removal work must also be performed. In this case, before performing cable installation, replacement, or removal work, it is necessary to preemptively inspect whether the cable being worked on is energized (i.e., live) for the safety of workers or electrical equipment. It must be done.

However, there were problems with safety accidents occurring due to reasons such as non-compliance with management and operation regulations (SOP, Standard Operating Procedure), operator misjudgment, and cable misdirection cutting.

To solve this problem, electroscopes have been developed recently to check whether the cable being worked on is live. However, research is being conducted to minimize human and material damage by zeroing the probability of an accident occurring. is needed.

In order to overcome these limitations, the present invention seeks to propose various means by which an operator can detect whether the cable to be cut is live.

FIG. 1 is a diagram showing the external configuration of a wearable device for detecting a live line according to an embodiment of the present invention, and FIG. 2 is a diagram for explaining the operating state of the wearable device for detecting a live line according to an embodiment of the present invention.

As shown in Figures 1 and 2, the live wire detection wearable device 300 according to an embodiment of the present invention may be configured to include a glove body 100 and a controller 200.

The glove body 100 may be worn on the hand of a worker performing installation, replacement, or removal work on the cable 10.

Specifically, the glove body 100 may be formed of a material such as electrically insulating rubber, polyethylene synthetic resin, or latex, but is not limited thereto, and may be formed on a multi-purpose glove formed of a material such as polyester, melange, nylon, or cotton. It may be coated with an electrically insulating material.

The glove body 100 may have a space therein to accommodate the worker's hands. That is, the glove body 100 may be formed with a plurality of spaces inside which the worker's fingers can be inserted.

Additionally, the glove body 100 may have a space formed to accommodate the controller 200. That is, the glove body 100 may have a space formed between the outer and inner surfaces corresponding to the worker's wrist to accommodate the main body 200c of the controller 200.

In addition, the glove body 100 has an antenna 200a of the controller 200 between the outer and inner surfaces corresponding to the worker's fingers, and a connection line 200b connecting the antenna 200a and the controller 200 main body 200c. ) can be formed to accommodate the space.

In the following configuration, the controller 200 can use a terrestrial magnetism sensor to detect whether the cable 10 adjacent to the glove body 100 is a live wire.

Specifically, the controller 200 may be composed of an antenna 200a, a connection line 200b, and a main body 200c.

The antenna 200a may be disposed in the space between the inner surface and the outer surface of the glove body 100 corresponding to the finger substance of the end of the worker's finger. However, it is not limited to this, and the antenna 200a may be disposed on the outer surface of the armor body 100 exposed at a point in contact with the cable 10.

When an operator holds the cable 10, the antenna 200a is in close contact with the cable 10 and can detect the magnetic field around the cable 10.

The connection line 200b can electrically connect the antenna 200a and the main body 200c. The connection line 200b is disposed between the outer and inner surfaces of the glove body 100 corresponding to the worker's fingers and palm from the antenna 200a to connect the antenna 200a and the main body 200c. However, it is not limited to this, and the connection line 200b may be exposed and disposed on the outer surface of the glove main body 100, or may be disposed on the inner surface of the glove main body 100.

This connection line 200b connects the antenna 200a and the main body 200c, and may be installed to have a preset tension. Because of this, the connection line 200b may generate a specific tension in proportion to the operator's gripping motion.

The main body 200c may be disposed between the inner surface and the outer surface of the glove main body 100 corresponding to the worker's wrist. However, it is not limited to this, and the main body 200c may be placed in an area corresponding to the back or palm of the worker's hand, and may be exposed and disposed on the outer surface of the glove main body 100, or on the inner surface of the glove main body 100. It may be deployed.

For example, the main body 200c may be composed of a film-type flexible substrate that has excellent resilience and shock resistance to prevent interference due to the operator's movement.

The main body 200c may be equipped with a geomagnetic sensor 110, an amplifier 120, a warning unit 130, a control unit 140, and a battery 150, which will be described later.

Meanwhile, specific components and operations of the controller 200 will be described later with reference to FIG. 3.

A worker wearing the live wire detection wearable device 300 having the configuration described above can immediately check whether the cable 10 held in his or her hand is a live wire. In particular, even if only some cables (10) among the bundle of cables (10) in which a plurality of live wires and non-live wires are fixed integrally are subject to work, regardless of whether a number of live wires are located around the work subject, the worker must only It is possible to accurately check whether the cable 10 held in the hand is a live wire.

Hereinafter, the components and operations of the live wire sensing wearable device 300 to achieve the above-described effects will be described in more detail.

Figure 3 is a configuration diagram of a controller according to an embodiment of the present invention.

As shown in FIG. 3, the controller 200 according to an embodiment of the present invention includes a geomagnetic sensor 210, a tension sensor 220, an amplifier 230, a warning unit 240, a control unit 250, and a battery. It may be configured to include (260).

Since some components of the controller 200 merely represent functionally distinct elements, in an actual physical environment, two or more components may be integrated with each other, or one component may be implemented separately.

To describe each component, the geomagnetic sensor 210 can detect a magnetic field generated from a cable.

Specifically, the geomagnetic sensor 210 can detect the magnetic field around the antenna 200a and measure the strength of the detected magnetic field. These geomagnetic sensors 210 include a geomagnetic sensor using a rotating coil, a fluxgate geomagnetic sensor using the magnetic saturation phenomenon of a ferromagnetic substance, and a nuclear magnetic resonance sensor of protons. One of the following is a quantum geomagnetic sensor using resonance, an optical pumping geomagnetic sensor using the Zeeman effect of rubidium or cesium atoms, and a squid geomagnetic sensor using superconductivity. It may be possible, but it is not limited to this.

The antenna 200a may include a first antenna 210a and a second antenna 210b disposed at the ends of different fingers. Here, the extremities of the fingers may be in contact with different points of the cable when the operator is gripping the cable.

For example, the first antenna 210a and the second antenna 210b may be placed on the inside of each of the worker's index and middle fingers. Through this, the antenna 200a can detect magnetic fields in different areas of the cable while the operator holds the cable.

In the following configuration, the tension sensor 220 (tension gauge) can measure the tension applied to the plurality of connection lines 200b that electrically connect the antenna 200a and the control unit 250.

Here, the connection line 200b can physically connect the above-described first antenna 210a and the second antenna 210b to the main body 200c, respectively, and is set to have a specific tension, so that the tension changes according to the operator's gripping motion. It can be.

With the following configuration, the amplifier 230 can amplify the magnetic field detected by the geomagnetic sensor 210.

Specifically, the amplifier 230 can amplify the magnetic field signal formed from the cable using electromagnetism. That is, the amplifier 230 can amplify the magnetic field signal formed from the cable to a preset value and transmit the amplified signal to the control unit 250 through the warning unit 240.

With the following configuration, the warning unit 240 can output one or more of light, sound, and vibration when a magnetic field is detected from the cable by the geomagnetic sensor 210.

Specifically, the warning unit 240 may be configured to include one or more of a light emitting element for outputting light, a speaker for outputting sound, and a vibration motor for outputting vibration.

In addition, when the control unit 250 determines that the cable is in a live state, the warning unit 240 may output one or more of light, sound, and vibration according to a pattern according to the user's settings.

With the following configuration, the control unit 250 determines whether the cable is live based on the magnetic field amplified by the amplifier 230, and outputs a warning signal through the warning unit 240 when the cable is determined to be live. there is.

Specifically, when the magnetic force is detected by the geomagnetic sensor 210, the control unit 250 first determines that the cable is in a live state, and calculates the magnitude value of the magnetic force detected by the geomagnetic sensor 210 and the magnetic force amplified by the amplifier. It is possible to match a pair of amplification multiple values to a previously prepared verification table and verify whether the first judgment is accurate based on the matched value from the verification table.

For example, if the size of the magnetic field detected from the cable by the geomagnetic sensor 110 does not match the amplification multiple of the magnetic force amplified by the amplifier 120, the control unit 140 uses the geomagnetic sensor 110 or the amplifier. It is determined that 120 is malfunctioning, and a warning signal according to the malfunction can be output through the warning unit 130.

In other words, since determining the live state of a cable is directly related to the life of the worker, malfunction of each component directly affects the life of the worker. Accordingly, the control unit 140 can minimize the occurrence of accidents by detecting malfunctions of the geomagnetic sensor 110 and the amplifier 120 in advance.

In addition, when the difference in the magnitude of magnetic force detected by the first antenna 210a and the second antenna 210b is greater than a preset value, the control unit 250 determines that the cable initially determined to be in a live state is in a non-live state. It can be judged that

That is, when the worker accurately grasps the cable that the worker wants to cut, the first antenna (210a) and the second antenna (210b) placed on the inside of the worker's middle and index fingers touch the same cable, so the magnetic force is the same. A magnetic field with

Accordingly, when the difference in the magnitude of magnetic force detected by the first antenna 210a and the second antenna 210b is greater than a preset value, the control unit 250 controls the first antenna 210a and the second antenna 210b. ), it may be determined that at least one of the cables is detecting the magnetic field of another adjacent cable, and the first determined cable may be determined to be in an inactive state.

In addition, the control unit 250 can recognize the tension acting on the plurality of connection lines 200b that electrically connect the first antenna 210a and the second antenna 210b by the operator's finger movements. .

Through the recognized tension, the control unit 250 may determine that the operator has gripped the cable when the tension value recognized from each of the plurality of connection lines 200b exceeds a preset value.

That is, the connection line 200b is set to have a specific tension between the first and second antennas 210a and 210b and the main body 200c. Accordingly, when the operator grips the cable, the tension applied to the connection line 200b increases.

Accordingly, the control unit 250 can identify the operator's grip posture through the tension of the connection line 200b measured by the tension sensor 220.

In addition, when the operator's grip posture is recognized, the control unit 250 compares the magnetic force detected in each of the first antenna 210a and the second antenna 210b, and connects the first antenna 210a and the second antenna 210b. If the difference between the magnitudes of magnetic force detected by is greater than a preset value, the cable initially determined to be in a live state may be determined to be in a non-live state.

That is, the control unit 250 can more accurately determine whether the cable is live by comparing the magnitude of the magnetic field detected from the first antenna 210a and the second antenna 210b while the operator is gripping the cable.

On the other hand, when the thickness of the cable is thick, the tension generated in the connection line is relatively small, and when the thickness of the cable is thin, the tension generated in the connection line is relatively large.

In other words, the tension of the connecting wire is proportional to the degree to which the worker bends his or her fingers to grip the cable. Therefore, because the worker bends his or her fingers to a greater extent when holding a relatively thin cable than when holding a relatively thick cable, greater tension in the connection wire is generated.

Accordingly, the control unit 250 can estimate the thickness of the cable based on the tension recognized from each of the plurality of connection lines.

Additionally, the control unit 250 may adjust the amplification factor of the amplifier according to the estimated thickness of the cable.

Additionally, the control unit 250 may determine that the cable is in a live state when the magnitude of the magnetic force increases from the time the magnetic field is first detected by the geomagnetic sensor 210 to the time the magnetic field becomes constant.

For example, when a worker holds a live cable, the magnitude of the magnetic force increases from the time the magnetic field is first detected to the time the magnetic field becomes constant because the worker's hands are continuously close to the cable.

Conversely, when a worker grasps a non-live cable in a situation where a live cable and a non-live cable coexist, the magnitude of the magnetic force may temporarily increase due to the live cable, but the grip cannot be completed. In case of inactivity the cable becomes smaller again.

Using these characteristics, the control unit 250 can accurately determine whether the cable held by the operator is live.

In addition, the control unit 250 outputs a first warning signal through the warning unit 240 when a magnetic field is detected from the geomagnetic sensor 210, and generates a second warning signal different from the first warning signal after verifying the live wire state. is output, but the pitch of the output sound can be varied and output in proportion to the strength of the detected magnetic force.

For example, in a situation where a plurality of live cables and a plurality of non-live cables coexist, it may be difficult to distinguish between live cables.

Accordingly, the control unit 250 outputs a variable sound pitch in proportion to the strength of the detected magnetic force, allowing the user to distinguish whether a plurality of cables are live according to the pitch of the sound. .

In the following configuration, the battery 260 can supply power to each component of the live wire detection wearable device 300 under the control of the control unit 250.

Figures 4 and 5 are exemplary diagrams for explaining the operation of a wearable device for detecting live wires according to an embodiment of the present invention.

Additionally, the live wire sensing wearable device 300 may determine that the cable is in a live wire state when the magnitude of the magnetic force increases from the time when the magnetic field is first detected by the geomagnetic sensor to the time when the magnetic field becomes constant.

For example, when a worker holds a live cable, the magnitude of the magnetic force increases from the time the magnetic field is first detected to the time the magnetic field becomes constant because the worker's hands are continuously close to the cable.

However, as shown in FIG. 4, in a situation where a live cable (b) and a non-live cable (a) coexist, when the worker holds the non-live cable (a), the live cable (a) The magnitude of the magnetic force may temporarily increase due to (b), but becomes smaller again due to the inactive cable (a) when the grip is completed.

Using these characteristics, the live wire detection wearable device 300 can accurately determine whether the cable held by the worker is live.

In addition, as shown in FIG. 5, the live wire sensing wearable device 300 detects tension acting on the connection line 200b that electrically connects the antenna 200a to the main body 200c due to the movement of the operator's finger. It can be recognized.

Here, the live wire detection wearable device 300 may determine that the worker has gripped the cable (a) when the tension value recognized from the connection line 200b through the recognized tension exceeds a preset value.

That is, the connection line 200b is set to have a specific tension between the antenna 200a and the main body 200c. Accordingly, when the worker grips the cable (a), the tension applied to the connection line (200b) increases.

Accordingly, the live wire detection wearable device 300 can identify the worker's grip posture through the tension of the connection wire 200b.

In addition, when the operator's grip posture is recognized, the live wire sensing wearable device 300 can determine whether the gripped cable (a) is in a live state by analyzing the magnetic field detected by the antenna 200a.

Meanwhile, when the cable is thick, the tension generated in the connection line 200b is relatively small, and when the cable is thin, the tension generated in the connection line 200b is relatively large.

In other words, the tension of the connection line 200b is proportional to the degree to which the worker bends his or her fingers to hold the cable. Therefore, because the worker bends his or her fingers to a greater extent when holding a relatively thin cable than when holding a relatively thick cable, greater tension in the connection wire is generated.

For example, when holding a cable with a diameter of 10 mm, the measured tension may be 1 [N], and when holding a cable with a diameter of 5 mm, the measured tension may be 2 [N]. .

Accordingly, the live wire sensing wearable device 300 can estimate the thickness of the cable based on the tension recognized from each of the plurality of connection wires.

The live wire sensing wearable device 300 can adjust the amplification ratio of the amplifier according to the estimated thickness of the cable.

In other words, a relatively thin cable has a relatively low magnetic force because a relatively low current flows, and a relatively thick cable has a relatively large magnetic force because a high current flows.

Accordingly, in order to accurately detect magnetic fields, it is necessary to adjust the amplification factor according to the thickness of the cable.

Accordingly, the live wire sensing wearable device 300 may adjust the amplification ratio of the amplifier according to the estimated thickness of the cable by referring to the amplification ratio table storing the amplification ratio of the amplifier according to the thickness of the cable.

As described above, although preferred embodiments of the present invention have been disclosed in the specification and drawings, it is known in the technical field to which the present invention belongs that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein. It is self-evident to those with ordinary knowledge. In addition, although specific terms are used in the specification and drawings, they are merely used in a general sense to easily explain the technical content of the present invention and aid understanding of the invention, and are not intended to limit the scope of the present invention. Accordingly, the above detailed description should not be construed as restrictive in all respects and should be considered illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention.

100: Glove body 200: Controller
210: geomagnetic sensor 220: tension sensor
230: amplifier 240: warning unit
250: Control unit 260: Battery
300: Live wire detection wearable device

Claims (10)

A geomagnetic sensor that detects a magnetic field transmitted from a cable through an antenna placed at a preset position on the palm surface of the glove body worn on the worker's hand;
an amplifier that amplifies the magnetic field detected by the geomagnetic sensor;
a warning unit that outputs at least one warning signal among light, sound, and vibration when the cable is determined to be in a live state; and
a control unit that determines whether the cable is live based on the magnetic field amplified by the amplifier, and outputs a warning signal through the warning unit when the cable is determined to be live; Including,
The geomagnetic sensor is
It includes a first antenna and a second antenna disposed at the extremities of different fingers,
The end of the finger is
This is a position where the worker touches different points on the cable in a position where he or she is gripping the cable,
The control unit
Recognize tension acting on a plurality of connection lines that electrically connect the first antenna and the second antenna to the control unit, respectively, and the cable grip posture of the worker based on the tension recognized from each of the plurality of connection lines. recognize,
When the operator's grip posture is recognized, the live state is determined by comparing the magnetic force detected from each of the first antenna and the second antenna, and the thickness of the cable is estimated based on the tension recognized from each of the plurality of connection lines. and adjusting the amplification factor of the amplifier according to the estimated thickness of the cable. delete The method of claim 1, wherein the control unit
When magnetic force is detected by the geomagnetic sensor, it is first determined that the cable is in a live state, and a pair of the magnitude value of the magnetic force detected by the geomagnetic sensor and the amplification multiple value of the magnetic force amplified by the amplifier is provided in advance. A live wire sensing wearable device that matches a verification table and verifies whether the first judgment is accurate based on the value matched from the verification table. The method of claim 3, wherein the control unit
Live line detection, characterized in that when the difference between the magnitudes of magnetic force detected by the first antenna and the second antenna is greater than a preset value, the cable initially determined to be in a live state is determined to be in a non-live state. Wearable devices. delete delete delete delete The method of claim 1, wherein the control unit
A wearable device for detecting a live wire, characterized in that it is determined that the cable is in a live state when the magnitude of the magnetic force increases from the time when the magnetic field is first detected to the point when the magnetic field becomes constant. The method of claim 1, wherein the control unit
When a magnetic field is detected from the geomagnetic sensor, a first warning signal is output through the warning unit, and after verifying the live wire state, a second warning signal different from the first warning signal is output, but is proportional to the intensity of the detected magnetic force. A live wire sensing wearable device characterized in that the pitch of the sound output is varied and output.

Images