GB2587083A - Electrical field detecting system - Google Patents
Electrical field detecting system Download PDFInfo
- 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 field
- detecting system
- 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.)
- Withdrawn
Links
- 230000005684 electric field Effects 0.000 title claims abstract description 54
- 210000000707 wrist Anatomy 0.000 claims abstract description 21
- 230000000007 visual effect Effects 0.000 claims abstract description 4
- 239000004020 conductor Substances 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 7
- 230000035945 sensitivity Effects 0.000 claims description 5
- 230000005672 electromagnetic field Effects 0.000 claims description 4
- 108091092568 Alarmone Proteins 0.000 claims 1
- 210000004247 hand Anatomy 0.000 description 2
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0807—Measuring electromagnetic field characteristics characterised by the application
- G01R29/0814—Field 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
- G01R29/085—Field 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0807—Measuring electromagnetic field characteristics characterised by the application
- G01R29/0814—Field 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
- G01R29/0857—Dosimetry, i.e. measuring the time integral of radiation intensity; Level warning devices for personal safety use
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/146—Measuring arrangements for current not covered by other subgroups of G01R15/14, e.g. using current dividers, shunts, or measuring a voltage drop
- G01R15/148—Measuring 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/145—Indicating the presence of current or voltage
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Emergency Alarm Devices (AREA)
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)
- 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. 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. An electrical field detecting system of claim 2, wherein the predetermined is 10kV and the predetermined distance is 750mm.
- 4. An electrical field detecting system of claim 2, wherein the predetermined voltage is 38kV and the predetermined distance is 1500mm.
- 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. 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. An electrical field detecting system of any preceding claim, wherein each detector is battery-powered.
- 8.. An electrical field detecting system of any preceding claim, wherein each detector is configured to measure electric field and not electromagnetic field.
- 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. 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. 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. 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.
Applications Claiming Priority (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 Withdrawn 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)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60114774A (en) * | 1983-11-28 | 1985-06-21 | K T Giken Kk | 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 |
-
2020
- 2020-07-09 GB GB2010568.0A patent/GB2587083A/en not_active Withdrawn
- 2020-07-09 AU AU2020101307A patent/AU2020101307A4/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60114774A (en) * | 1983-11-28 | 1985-06-21 | K T Giken Kk | 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |