GB2587083A - Electrical field detecting system - Google Patents

Electrical field detecting system Download PDF

Info

Publication number
GB2587083A
GB2587083A GB2010568.0A GB202010568A GB2587083A GB 2587083 A GB2587083 A GB 2587083A GB 202010568 A GB202010568 A GB 202010568A GB 2587083 A GB2587083 A GB 2587083A
Authority
GB
United Kingdom
Prior art keywords
detector
electrical
detecting
alarm
detectors
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
GB2010568.0A
Other versions
GB202010568D0 (en
Inventor
Michael Hoyle Christian
Original Assignee
Michael Hoyle Christian
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to IES20190120 priority Critical
Application filed by Michael Hoyle Christian filed Critical Michael Hoyle Christian
Publication of GB202010568D0 publication Critical patent/GB202010568D0/en
Publication of GB2587083A publication Critical patent/GB2587083A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/08Measuring electromagnetic field characteristics
    • G01R29/0807Measuring electromagnetic field characteristics characterised by the application
    • G01R29/0814Field measurements related to measuring influence on or from apparatus, components or humans, e.g. in ESD, EMI, EMC, EMP testing, measuring radiation leakage; detecting presence of micro- or radiowave emitters; dosimetry; testing shielding; measurements related to lightning
    • G01R29/085Field measurements related to measuring influence on or from apparatus, components or humans, e.g. in ESD, EMI, EMC, EMP testing, measuring radiation leakage; detecting presence of micro- or radiowave emitters; dosimetry; testing shielding; measurements related to lightning for detecting presence or location of electric lines or cables
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/08Measuring electromagnetic field characteristics
    • G01R29/0807Measuring electromagnetic field characteristics characterised by the application
    • G01R29/0814Field measurements related to measuring influence on or from apparatus, components or humans, e.g. in ESD, EMI, EMC, EMP testing, measuring radiation leakage; detecting presence of micro- or radiowave emitters; dosimetry; testing shielding; measurements related to lightning
    • G01R29/0857Dosimetry, i.e. measuring the time integral of radiation intensity; Level warning devices for personal safety use
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00 and G01R33/00 - G01R35/00
    • G01R15/14Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/146Measuring arrangements for current not covered by other subgroups of G01R15/14, e.g. using current dividers, shunts, or measuring a voltage drop
    • G01R15/148Measuring arrangements for current not covered by other subgroups of G01R15/14, e.g. using current dividers, shunts, or measuring a voltage drop involving the measuring of a magnetic field or electric field
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/145Indicating the presence of current or voltage

Abstract

An electrical field detecting system comprising a pair of electric field detectors 3a, 3b, worn simultaneously on each arm or wrist of a user is disclosed. Each detector is configured to signal an alarm once said detector detects the presence of an electric field equal to or above a predetermined strength value. An application may include sensing the electric field around a high voltage facility using an antenna 11, with an inverted cone shape. The alarm may be an audio alarm, a visual signal or a tactile alarm. The detector (3a, 3b) may comprise a speaker 7 or LED 9. Each detector may be provided with a fastener 5 in the form of a band or bracelet allowing easy attachment to the wrist. Each detector may be battery powered.

Description

ELECTRICAL FIELD DETECTING SYSTEM
Field of the Invention
The present invention relates to an electrical filed detecting system for sensing the electric
field around a high-voltage facility.
Background to the Invention
Personal high voltage detectors specifically designed to alert people working in high voltage facilities are known. For example, people working in high voltage substation are subjected to the risk of being exposed to strong electromagnetic fields. In a live substation environment, the substation owners set up safe working distances and close proximity distance to live conductors, these distances are generally set by the voltage on the conductor, for example for 10kV it could be 750mm and for 38kV it could be 1.5m. These close proximity rules can be less if the conductors are behind metal earthed screens. In nearly all substations, it would be the person's hands that are most likely to breach the close proximity rules because the hands are often closest to the live facilities when working. In order to prevent electric shock, the staff are generally equipped with a bracelet type high voltage detector which signals an alarm once the user's hand is within the close proximity distance. Although there are a number of wrist worn high voltage detectors available on the market, none are ideal for a live substation environment for a number of reasons. One reason is that the person's hand with high voltage detector on can be within the safe distance from live conductors whilst other parts of the person's body can breach the close proximity boundary.
In view of the above, it is an object of the present invention to alleviate and mitigate the above disadvantages.
Summary of the Invention
According to a first aspect, the present invention provides an electrical field detecting system comprising a pair electrical field detectors, said detectors being configured to be worn simultaneously on a user's arms or wrists, one detector on each said arm or wrist; and each detector being configured to signal an alarm once said detector detects the presence of an electrical field equal or above a predetermined strength value.
The predetermined strength of the electrical field is preferably the strength present within a specified distance from a conductor, the conductor having a predetermined voltage across it. In one instance, the predetermined voltage can be 10kV and the predetermined distance can be 750mm. In another instance, the predetermined voltage can be 38kV and the predetermined distance can be 1.5m.
With existing single detectors, if a person's arms were wide apart, there is a possibility that the arm not having a detector on could be in contact with a 10kV conductor while the other arm with the detector on it could be spaced from the conductor by a distance over 750mm as most people's arms when wide apart would cover the distance of over 750mm. In this case, the detector will not be activated and the person can receive an electric shock. The same situation is also possible with 38kV conductors because some people's arms could cover the length of over 1.5m when wide apart. By providing detectors on both arms, the present invention solves this problem.
Preferably, each detector is provided with a fastener for wearing the detector on the user's arm or wrist. The fastener may be provided, for example, in the form of a band or a bracelet, but the invention is not limited thereto. The band may be an elastic band. Preferably the fastener is adapted to be worn on a user's wrist.
Advantageously, each detector is configured to measure electric field and, preferably, not electromagnetic field. Without current flow there is no magnetic field. This arrangement is useful in a situation where a circuit is open and there is no current flow in the conductor, but the conductor still has potential to be live at a point of disconnect and back.
Preferably, each detector comprises an antenna for detecting an electric field. Preferably, the antenna is of an inverted cone type having a face in the shape of an inverted cone. This renders each detector's sensitivity independent of the detector's orientation with respect to the conductor.
Preferably, each detector is configured so that the sensitivity of each detector, i.e. the electrical field strength at which the detector signals an alarm, can be adjusted by changing firmware settings of the detector.
The alarm may be an audio alarm, e.g. sound, a visual signal, e.g. a flashing light, tactile, e.g. vibration or a combination thereof.
Each detector is preferably battery-powered.
According to a second aspect, the invention provides a method of operating an electrical field detecting system, the method comprising the steps of: providing a pair electrical field detectors, said detectors being configured to be worn simultaneously on a user's arms or wrists, one detector on each said arm or wrist; and each detector being configured to signal an alarm once said detector detects the presence of an electrical field equal or above a predetermined strength; wearing the detectors, one detector on each said arm or wrist.
The method further comprises the step of causing one of the detectors to signal an alarm once said detector detects the presence of an electric field equal or above a predetermined strength value within a predetermined distance from a source of the electric field, whilst the other detector is positioned outside the predetermined distance, in an area in which the electric field is below the predetermined strength value.
Features of the first aspect of the invention can be incorporated into the second aspect of the invention as appropriate and vice versa.
Detailed Description of the Invention
The invention will now be described with reference to the accompanying drawings, which show, by way of example only, an embodiment of the invention. In the drawings: Figure 1 is a schematic perspective view of an electrical field detecting system in accordance with the invention, and Figure 2 is a schematic perspective view of an antenna used in the electrical field detecting system of Figure 1.
Referring to Figure 1, an electrical field detecting system of the invention is indicated generally by reference numeral 1. The electrical field detecting system 1 comprises a pair electrical field detectors (3a, 3b). The detectors (3a, 3b) are configured to be worn simultaneously on a user's arms or wrists, one detector (3a, 3b) on each said arm or wrist. Each detector (3a, 3b) is configured to signal an alarm once the detector (3a, 3b) detects the presence of an electrical field equal or above a predetermined strength value.
The predetermined strength of the electrical field is preferably the strength present within a specified distance from a conductor (not shown in the drawings) having a predetermined voltage across it. In one instance, the predetermined voltage can be 10kV and the predetermined distance can be 750mm. In another instance, the predetermined voltage can be 38kV and the predetermined distance can be 1.5m. Other combinations of predetermined voltage and predetermined distance are within the scope of the invention.
With existing single detectors, if a person's arms were wide apart, there is a possibility that the arm not having a detector on could be in contact with a 10kV conductor while the other arm with the detector on it could be spaced from the conductor by a distance over 750mm as most people's arms when wide apart would cover the distance of over 750mm. In this case, the detector will not be activated and the person can receive an electric shock. The same situation is also possible with 38kV conductors because some people's arms could cover the length of over 1.5m when wide apart. By providing detectors on both arms, the present invention solves this problem.
Each detector (3a, 3b) is provided with a fastener 5 for wearing the detector (3a, 3b) on the user's arm or wrist. The fastener 5 may be provided, for example, in the form of a band (see Figure 1) or a bracelet, but the invention is not limited thereto. The band may be an elastic band. Preferably the fastener 5 is adapted to be worn on a user's wrist.
Each detector (3a, 3b) is configured to measure electric field rather than electromagnetic field.
Since without current flow there is no magnetic field, this arrangement is useful in a situation where a circuit is open and there is no current flow in the conductor, but the conductor still has potential to be live at a point of disconnect and back.
Each detector (3a, 3b) comprises an antenna 11 (see Figure 2) for detecting an electric field.
The antenna 11 is preferably of an inverted cone type having a face in the shape of an inverted cone. This renders each detector's sensitivity independent of the detector's orientation in relation to the conductor.
Each detector (3a, 3b) is configured so that the sensitivity of each detector (3a, 3b), i.e. the electrical field strength at which the detector signals an alarm, can be adjusted by changing firmware settings of the detector (3a, 3b).
The alarm may be a sound or a visual signal, e.g. a flashing light, or a combination thereof. For this purpose, the detector (3a, 3b) comprises a speaker 7 and an LED 9. Tactile alarm, e.g. vibration may also be included.
Each detector (3a, 3b) is preferably battery-powered.
In use, the user wears the detectors (3a, 3b), one detector (3a, 3b) on each arm or wrist. As soon as one of the detectors (3a, 3b) detects the presence of an electric field equal or above a predetermined strength value within a predetermined distance from a source of the electric field, that detector (3a, 3b) signals an alarm. At the same time, the other detector (3a, 3b) may be positioned outside the predetermined distance, in an area in which the electric field is below the predetermined strength value, and therefore the other detector (3a, 3b) will not signal an alarm.
It will be appreciated by those skilled in the art that variations and modifications can be made without departing from the scope of the invention as defined in the appended claims.

Claims (12)

  1. CLAIMS:1. An electrical field detecting system comprisinga pair electrical field detectors, said detectors being configured to be worn simultaneously on a user's arms or wrists, one detector on each said arm or wrist; and each detector being configured to signal an alarm once said detector detects the presence of an electrical field equal or above a predetermined strength value.
  2. 2. An electrical field detecting system of claim 1, wherein the predetermined strength of the electrical field is the strength present within a specified distance from a conductor, the conductor having a predetermined voltage across it.
  3. 3. An electrical field detecting system of claim 2, wherein the predetermined is 10kV and the predetermined distance is 750mm.
  4. 4. An electrical field detecting system of claim 2, wherein the predetermined voltage is 38kV and the predetermined distance is 1500mm.
  5. 5. An electrical field detecting system of any preceding claim, wherein each detector is provided with a fastener for wearing the detector on the user's arm or wrist.
  6. 6. An electrical field detecting system of any preceding claim, wherein the alarm one of an audio alarm, a visual signal, a tactile alarm, or a combination thereof.
  7. 7. An electrical field detecting system of any preceding claim, wherein each detector is battery-powered.
  8. 8.. An electrical field detecting system of any preceding claim, wherein each detector is configured to measure electric field and not electromagnetic field.
  9. 9. An electrical field detecting system of claim 8, wherein each detector is configured so that the sensitivity of each detector, i.e. the electrical field strength at which the detector signals an alarm, can be adjusted by changing firmware settings of the detector.
  10. 10. An electrical field detecting system of any preceding claim, wherein each detector comprises an antenna for detecting an electric field, wherein the antenna is of an inverted cone type having a face in the shape of an inverted cone.
  11. 11. A method of operating an electrical field detecting system, the method comprising the steps of: providing a pair electrical field detectors, said detectors being configured to be worn simultaneously on a user's arms or wrists, one detector on each said arm or wrist; and each detector being configured to signal an alarm once said detector detects the presence of an electrical field equal or above a predetermined strength; wearing the detectors, one detector on each said arm or wrist.
  12. 12. A method of claim 11, wherein the method further comprises the step of causing one of the detectors to signal an alarm once said detector detects the presence of an electric field equal or above a predetermined strength value within a predetermined distance from a source of the electric field, whilst the other detector is positioned outside the predetermined distance, in an area in which the electric field is below the predetermined strength value.
GB2010568.0A 2019-07-10 2020-07-09 Electrical field detecting system Pending GB2587083A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
IES20190120 2019-07-10

Publications (2)

Publication Number Publication Date
GB202010568D0 GB202010568D0 (en) 2020-08-26
GB2587083A true GB2587083A (en) 2021-03-17

Family

ID=71949512

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2010568.0A Pending GB2587083A (en) 2019-07-10 2020-07-09 Electrical field detecting system

Country Status (2)

Country Link
AU (1) AU2020101307A4 (en)
GB (1) GB2587083A (en)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60114774A (en) * 1983-11-28 1985-06-21 Iwato Takashi Electric field detecting apparatus
US4983954A (en) * 1989-09-29 1991-01-08 Rockwell International Corporation Shock hazard warning device
US6329924B1 (en) * 2000-03-17 2001-12-11 Hd Electric Company Wearable electric field detector
WO2008008109A2 (en) * 2006-07-11 2008-01-17 Jones Richard K Wrist-wearable electrical detection device
CN204405724U (en) * 2014-12-20 2015-06-17 国家电网公司 A kind of bracelet-shaped detector of finding out dangerous voltage
CN204409675U (en) * 2014-12-20 2015-06-24 国家电网公司 A kind of insulating glove of detectable dangerous voltage
CN204856822U (en) * 2015-06-23 2015-12-09 国网山东省电力公司济南供电公司 Protection against electric shock warning bracelet
US9698590B1 (en) * 2014-09-30 2017-07-04 Eusebio Mercado Personal electronic injury protection device
CN107909770A (en) * 2017-12-15 2018-04-13 国网冀北电力有限公司唐山供电公司 A kind of nearly electricity voice alarm bracelet and method
CN208255318U (en) * 2018-05-02 2018-12-18 国网湖北省电力有限公司宜昌供电公司 A kind of wrist anti-electric shock apparatus

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60114774A (en) * 1983-11-28 1985-06-21 Iwato Takashi Electric field detecting apparatus
US4983954A (en) * 1989-09-29 1991-01-08 Rockwell International Corporation Shock hazard warning device
US6329924B1 (en) * 2000-03-17 2001-12-11 Hd Electric Company Wearable electric field detector
WO2008008109A2 (en) * 2006-07-11 2008-01-17 Jones Richard K Wrist-wearable electrical detection device
US9698590B1 (en) * 2014-09-30 2017-07-04 Eusebio Mercado Personal electronic injury protection device
CN204405724U (en) * 2014-12-20 2015-06-17 国家电网公司 A kind of bracelet-shaped detector of finding out dangerous voltage
CN204409675U (en) * 2014-12-20 2015-06-24 国家电网公司 A kind of insulating glove of detectable dangerous voltage
CN204856822U (en) * 2015-06-23 2015-12-09 国网山东省电力公司济南供电公司 Protection against electric shock warning bracelet
CN107909770A (en) * 2017-12-15 2018-04-13 国网冀北电力有限公司唐山供电公司 A kind of nearly electricity voice alarm bracelet and method
CN208255318U (en) * 2018-05-02 2018-12-18 国网湖北省电力有限公司宜昌供电公司 A kind of wrist anti-electric shock apparatus

Also Published As

Publication number Publication date
AU2020101307A4 (en) 2020-08-13
GB202010568D0 (en) 2020-08-26

Similar Documents

Publication Publication Date Title
US9577389B2 (en) Systems and methods for modular shock proof electrical outlets
US6016105A (en) Fault indicator providing contact closure and light indication on fault detection
US4858622A (en) Fall alert system with magnetically operable switch
EP3513711A1 (en) Wearing dependent operation of wearbale device
US5959533A (en) Tamper detection for body worn transmitter
US6731217B1 (en) Electrical circuit tester
KR101725239B1 (en) Smart wear for measuring bio-signal
AU2017265051B2 (en) Integrated alarm device
US6788215B1 (en) Electric field detector with GPS
KR101502248B1 (en) Maximizing power yield from wireless power magnetic resonators
US5907522A (en) Portable device for receiving and/or transmitting radio-transmitted messages comprising an inductive capacitive antenna
WO2015191203A1 (en) Three-dimensional wireless charging coil
CN101505710B (en) Assistance system for visually handicapped persons
CA2583705C (en) Dynamic energy threshold calculation for high impedance fault detection
US6211672B1 (en) Human appendage mounted metal detector
WO2015177594A3 (en) Electrocardiogram watch clasp
TW479117B (en) Individual protective device against mechanical, electrical or thermal risks
WO2004071353A3 (en) Medical device with magnetic resonance visibility enhancing structure
WO2016014260A1 (en) Personal wearable system that detects hazardous voltages and indicates direction of the source
US9970975B2 (en) System for the standoff detection of power line hazards
EP3188569A1 (en) Method for detecting fall-off of wearable device, and wearable device
GB2346485B (en) Structure with magnetic properties
CN204731935U (en) A kind of device of intellectual monitoring Falls in Old People
US10255781B1 (en) Floating apparatus for alerting people of the presence of voltage in water
WO2016100339A1 (en) Wireless power base unit and a system and method for wirelessly charging distance separated electronic devices