WO2010148427A1 - Power lead testing system and electronic tag - Google Patents

Power lead testing system and electronic tag Download PDF

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Publication number
WO2010148427A1
WO2010148427A1 PCT/AU2010/000755 AU2010000755W WO2010148427A1 WO 2010148427 A1 WO2010148427 A1 WO 2010148427A1 AU 2010000755 W AU2010000755 W AU 2010000755W WO 2010148427 A1 WO2010148427 A1 WO 2010148427A1
Authority
WO
WIPO (PCT)
Prior art keywords
lead
tag
test
testing system
test unit
Prior art date
Application number
PCT/AU2010/000755
Other languages
French (fr)
Inventor
Stephen Allen Morton
Original Assignee
Stephen Allen Morton
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 claimed from AU2009902913A external-priority patent/AU2009902913A0/en
Application filed by Stephen Allen Morton filed Critical Stephen Allen Morton
Priority to CN201080028640.3A priority Critical patent/CN102803976B/en
Priority to AU2010265831A priority patent/AU2010265831A1/en
Priority to NZ597604A priority patent/NZ597604A/en
Publication of WO2010148427A1 publication Critical patent/WO2010148427A1/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/54—Testing for continuity
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
    • H01R13/6658—Structural association with built-in electrical component with built-in electronic circuit on printed circuit board
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
    • H01R13/6666—Structural association with built-in electrical component with built-in electronic circuit with built-in overvoltage protection

Definitions

  • This invention relates to equipment for testing electrical power leads and tools for compliance with safety standards and to electronic tags which interact with a testing device.
  • a power lead testing system comprises a test unit for applying standard voltage and continuity tests to the lead and an electronic tag integrated with the lead having a countdown timer, said tag communicating with said test unit which resets the timer for a defined period when the lead passes the applied voltage and continuity tests and also incorporates a circuit breaker which is triggered when the lead fails either the voltage or continuity test or when the countdown time elapses, thus isolating the lead.
  • the tag has indicators which indicate whether the lead is isolated or active.
  • the tag also has an indicator to indicate a defined remaining countdown period.
  • the tag is adapted to be retrofitted to standard power leads.
  • test unit has a data entry facility and a read out display.
  • test unit Preferably communication between the test unit and the tag is via an infrared link.
  • test unit is used to assign an identifier and a password to a new tag and the correct password has to be entered in order to retest the lead.
  • test unit uploads data to a data storage device.
  • test data is uploaded to a log recorder which records Date of Test, Time of Test, Assigned Serial Number, Test Result, Due Date for Next Test, Location of Lead, Lead or Tool Description and Licence Number of Tester.
  • a method of testing a power lead using the above system comprises the following steps:
  • a method of testing a power lead using the above system comprises the following steps:
  • FIG. 1 is a flow chart of test sequences using the testing system
  • FIG 2 is a side elevation of a power lead plug incorporating an electronic tag
  • FIG 3 is a plan view of the plug of Fig 2
  • Fig 4 is a section along line AA of the plug of Fig 2
  • Fig 5 is a side elevation of the plug of Fig 3
  • Fig 6 is an exploded view of the plug of Fig 2 with locking connector
  • Fig 7 is a circuit diagram showing circuitry of an electronic tag
  • Figs 8 to 11 are circuit diagram showing circuitry of a testing device.
  • Figures 2 to 5 show a power lead 1 with male three point plug 2 and female plug 3 incorporating electronic tag 4.
  • Electronic tag 4 contains the circuitry shown in Fig 7 incorporating a power supply to convert mains supply power to a 24 volt and 5 volt supply, a microcontroller with battery backup for real time countdown and communication with a testing device, an infra-red transceiver circuit for communication with a testing device and a relay for disconnecting mains power when a set time has elapsed.
  • Cross section Fig 4 exposes circuit board 6 which carries the above circuitry and also contains LEDs 7 which indicate the condition of lead 1.
  • a green LED indicates a safe lead
  • a flashing LED indicates that the lead will disconnect in a set period of time and needs to be retested
  • a red LED indicates that the lead cannot be used until retested.
  • Transparent top 8 on tag 4 allows indicator LEDs 7 to be seen and also allows transmission of infrared signals between tag 4 and a hand held testing device (not shown).
  • the exploded view of Fig 6 shows how female plug 3 and circuit board 6 are assembled in tag 4. It also shows mating halves of locking connector 9 which is used to lock male plug of lead 10 to tag 4. Non removable screws 11 lock the two halves of connector 9 over mating plugs 3 and 10 so that tag 4 is integrated into lead 10.
  • test unit assigns a licence number to the tag and assigns the next test date as defined by the standard.
  • a password for testing access to the tag is also assigned and when all this data is uploaded to a USB storage device attached to the test unit, the tag is activated for use.
  • a tag If a tag is recognized by the test unit as having been tested previously it will ask for a password and if accepted it will display the last test date and proceed with voltage and continuity tests. If either test fails the lead is locked out but if both are passed it assigns the next test date. As before, when the test results are uploaded to a USB device the tag will be reactivated allowing the lead to be used.
  • the USB device records Date of Test, Time of Test, Assigned Serial Number, Test Result, Due Date for Next Test, Location of Lead, Lead or Tool Description and Licence Number of Tester.
  • Figs 8 to 11 are circuit diagrams detailing the circuitry of the hand held test unit which has a digital read out display and keypad for data entry (not shown).
  • Fig 8 shows the high voltage generator which applies 500 volts to the power lead being tested and consists of an oscillator circuit, a voltage step-up and rectifier and a voltage feedback and monitoring circuit.
  • Fig 9 shows circuitry consisting of a low resistance circuit with a constant current supply and voltage detector and an adjustable power supply for the high voltage generator and low resistance circuit.
  • Fig 10 shows the microcontroller which has keypad input, LCD output, a real time clock, microcontroller inputs and outputs, driver circuit for relays, communications to V drive for USB storage of data and a power supply for the microcontroller.
  • Fig 11 shows the relay network which allows various combinations of the active neutral and earth pins to be connected to the high voltage generator and low resistance circuit for testing.
  • a log of all plugs tested can be read out at any time from the USB upload storage device and is a secure record of the location and status of the lead. Further when an inspector sees that a power lead has the distinctive plug of the automatic testing system of the present invention, he will know that if the fead is working it must have been tested in compliance with the standard.
  • testing system of the present invention automates the standard testing procedure and so reduces the time taken to perform a safety test.
  • Further electronic tag 4 provides an immediate indication that the lead has been tested and complies with the required safety standard. If it did not the relay in the plug would have been triggered and the lead would not conduct power from the outlet.

Abstract

A power lead testing system comprises a test unit for applying standard voltage and continuity tests to the lead and an electronic tag integrated with the lead having a countdown timer, said tag communicating with said test unit which resets the timer for a defined period when the lead passes the applied voltage and continuity tests and also incorporates a circuit breaker which is triggered when the lead fails either the voltage or continuity test or when the countdown time elapses, thus isolating the lead.

Description

POWER LEAD TESTING SYSTEM AND ELECTRONIC TAG
FIELD OF THE INVENTION
This invention relates to equipment for testing electrical power leads and tools for compliance with safety standards and to electronic tags which interact with a testing device.
BACKGROUND OF THE INVENTION
Electrical safety standards require that power leads for tools and extension leads are tested and certified as compliant at regular intervals. Presently this is a manual process in which a testing instrument is applied to the plug of the lead and if the stipulated insulation and continuity tests are met, a printed label with the date of testing is applied to the lead.
This manual process is time consuming and there is nothing to stop the tool or lead being used beyond the set time required for the next test to be carried out. One answer to the latter problem can be found in GB 2450466 which discloses an electric plug incorporating a countdown timer. When the plug is plugged into a power outlet which is turned on, the timer is activated and when a lapsed time period beyond initial activation has passed the active terminal circuit is interrupted and the lead remains disconnected from the power supply.
Although this plug addresses the issue of continued illegal use of a lead beyond the set testing time it still requires manual testing and resetting of the countdown timer which is time consuming. US 2005023118 teaches a similar power switch control device but does not address the problem of manual testing. OBJECT OF THE INVENTION
It is therefore an object of the present invention to provide an automated power lead testing system which minimizes testing time and prevents illegal use or at least to provide an alternative method of testing and certifying power leads.
STATEMENT OF THE INVENTION
According to the present invention a power lead testing system comprises a test unit for applying standard voltage and continuity tests to the lead and an electronic tag integrated with the lead having a countdown timer, said tag communicating with said test unit which resets the timer for a defined period when the lead passes the applied voltage and continuity tests and also incorporates a circuit breaker which is triggered when the lead fails either the voltage or continuity test or when the countdown time elapses, thus isolating the lead.
Preferably the tag has indicators which indicate whether the lead is isolated or active.
Preferably the tag also has an indicator to indicate a defined remaining countdown period.
Preferably the tag is adapted to be retrofitted to standard power leads.
Preferably the test unit has a data entry facility and a read out display.
Preferably communication between the test unit and the tag is via an infrared link. Preferably the test unit is used to assign an identifier and a password to a new tag and the correct password has to be entered in order to retest the lead.
Preferably the test unit uploads data to a data storage device.
Preferably the test data is uploaded to a log recorder which records Date of Test, Time of Test, Assigned Serial Number, Test Result, Due Date for Next Test, Location of Lead, Lead or Tool Description and Licence Number of Tester.
Alternatively a method of testing a power lead using the above system comprises the following steps:
1. plug lead incorporating tag into test unit
2. tag is not recognized by unit 3. voltage and continuity tests are applied to lead and passed
4. identifier and password assigned to tag
5. next test date set
6. identifier , password and next test date uploaded to data storage device
7. tag activates lead.
Alternatively a method of testing a power lead using the above system comprises the following steps:
1. plug lead incorporating tag into test unit
2. identifier is indicated and password entered 3. last test date is displayed
4. voltage and continuity tests are applied to lead. and passed
5. next test date set
' 6. identifier, password and next test date uploaded to data storage device
7. tag activates lead. BRIEF DESCRIPTION OF THE DRAWINGS
Various embodiments of the invention are now described by way of example only with reference to the accompanying drawings in which Fig 1 is a flow chart of test sequences using the testing system Fig 2 is a side elevation of a power lead plug incorporating an electronic tag Fig 3 is a plan view of the plug of Fig 2 Fig 4 is a section along line AA of the plug of Fig 2 Fig 5 is a side elevation of the plug of Fig 3
Fig 6 is an exploded view of the plug of Fig 2 with locking connector Fig 7 is a circuit diagram showing circuitry of an electronic tag and Figs 8 to 11 are circuit diagram showing circuitry of a testing device.
DETAILED DESCRIPTION OF THE INVENTION
Figures 2 to 5 show a power lead 1 with male three point plug 2 and female plug 3 incorporating electronic tag 4. Electronic tag 4 contains the circuitry shown in Fig 7 incorporating a power supply to convert mains supply power to a 24 volt and 5 volt supply, a microcontroller with battery backup for real time countdown and communication with a testing device, an infra-red transceiver circuit for communication with a testing device and a relay for disconnecting mains power when a set time has elapsed.
Cross section Fig 4 exposes circuit board 6 which carries the above circuitry and also contains LEDs 7 which indicate the condition of lead 1. A green LED indicates a safe lead, a flashing LED indicates that the lead will disconnect in a set period of time and needs to be retested and a red LED indicates that the lead cannot be used until retested. Transparent top 8 on tag 4 allows indicator LEDs 7 to be seen and also allows transmission of infrared signals between tag 4 and a hand held testing device (not shown). The exploded view of Fig 6 shows how female plug 3 and circuit board 6 are assembled in tag 4. It also shows mating halves of locking connector 9 which is used to lock male plug of lead 10 to tag 4. Non removable screws 11 lock the two halves of connector 9 over mating plugs 3 and 10 so that tag 4 is integrated into lead 10. By this means tags can be sold separately for retrofitting to standard power leads and power tools.
The logic behind the testing system of the present invention is illustrated in Figure 1. When plug 3 of a new tag 4 is inserted into the hand held testing unit (not shown) the unit will not recognize it but will proceed to apply the standard voltage and continuity tests for power leads. If either.of these tests fail the lead will be locked out by operation of the relay which disconnects mains power.
If the lead passes both tests the test unit assigns a licence number to the tag and assigns the next test date as defined by the standard. A password for testing access to the tag is also assigned and when all this data is uploaded to a USB storage device attached to the test unit, the tag is activated for use.
If a tag is recognized by the test unit as having been tested previously it will ask for a password and if accepted it will display the last test date and proceed with voltage and continuity tests. If either test fails the lead is locked out but if both are passed it assigns the next test date. As before, when the test results are uploaded to a USB device the tag will be reactivated allowing the lead to be used. The USB device records Date of Test, Time of Test, Assigned Serial Number, Test Result, Due Date for Next Test, Location of Lead, Lead or Tool Description and Licence Number of Tester.
Figs 8 to 11 are circuit diagrams detailing the circuitry of the hand held test unit which has a digital read out display and keypad for data entry (not shown). Fig 8 shows the high voltage generator which applies 500 volts to the power lead being tested and consists of an oscillator circuit, a voltage step-up and rectifier and a voltage feedback and monitoring circuit. Fig 9 shows circuitry consisting of a low resistance circuit with a constant current supply and voltage detector and an adjustable power supply for the high voltage generator and low resistance circuit.
Fig 10 shows the microcontroller which has keypad input, LCD output, a real time clock, microcontroller inputs and outputs, driver circuit for relays, communications to V drive for USB storage of data and a power supply for the microcontroller. Fig 11 shows the relay network which allows various combinations of the active neutral and earth pins to be connected to the high voltage generator and low resistance circuit for testing.
A log of all plugs tested can be read out at any time from the USB upload storage device and is a secure record of the location and status of the lead. Further when an inspector sees that a power lead has the distinctive plug of the automatic testing system of the present invention, he will know that if the fead is working it must have been tested in compliance with the standard.
ADVANTAGES
It will be obvious that the testing system of the present invention automates the standard testing procedure and so reduces the time taken to perform a safety test. Further electronic tag 4 provides an immediate indication that the lead has been tested and complies with the required safety standard. If it did not the relay in the plug would have been triggered and the lead would not conduct power from the outlet.
VARIATIONS
It will be realised that the foregoing has been given by way of illustrative example only and that all other modifications and variations as would be apparent to persons skilled in the art are deemed to fall within the broad scope and ambit of the invention as herein set forth. For example different circuits could be used in the plug to achieve time count down and power circuit breaking. Throughout the description and claims of this specification the word "comprise" and variations of that word such as "comprises" and "comprising" are not intended to exclude other additives, components, integers or steps.

Claims

1. A power lead testing system comprising a test unit for applying standard voltage and continuity tests to the lead and an electronic tag integrated with the lead having a countdown timer, said tag communicating with said test unit which resets the timer for a defined period when the lead passes the applied voltage and continuity tests and also incorporates a circuit breaker which is triggered when the lead fails either the voltage or continuity test or when the countdown time elapses, thus isolating the lead. ,
2. The testing system of claim 1 in which the tag has indicators which indicate whether the lead is isolated or active.
3. The testing system of claim 1 in which the tag also has an indicator to indicate a defined remaining countdown period.
4. The testing system of claim 1 in which the tag is adapted to be retrofitted to standard power leads.
5. The testing system of claim 1 in which the test unit has a data entry facility and a read out display.
6. The testing system of claim 1 in which communication between the test unit and the tag is via an infrared link.
7. The testing system of claim 5 in which the test unit is used to assign an identifier and a password to a new tag and the correct password has to be entered in order to retest the lead.
8' The testing system of claim 5 in which the test unit uploads data to a data storage device.
9. The testing system of claim 8 in which the test data is uploaded to a log recorder which records Date of Test, Time of Test, Assigned Serial Number, Test Result, Due Date for Next Test, Location of Lead, Lead or Tool Description and Licence Number of Tester.
10. A method of testing a power lead using the system of claim 7 comprising the following steps:
8. plug lead incorporating tag into test unit 9. tag is not recognized by unit
10. voltage and continuity tests are applied to lead and passed
11. identifier and password assigned to tag
12. next test date set
13. identifier . password and next test date uploaded to data storage device 14. tag activates Jead.
11. A method of retesting a power lead using the system of claim 7 comprising the following steps:
1. plug lead incorporating tag into test unit 4. identifier is indicated and password entered
5. last test date is displayed
4. voltage and continuity tests are applied to lead and passed
5. next test date set
6. identifier, password and next test date uploaded to data storage device 7. tag activates lead.
PCT/AU2010/000755 2009-06-24 2010-06-20 Power lead testing system and electronic tag WO2010148427A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201080028640.3A CN102803976B (en) 2009-06-24 2010-06-20 Power lead testing system and electronic tag
AU2010265831A AU2010265831A1 (en) 2009-06-24 2010-06-20 Power lead testing system and electronic tag
NZ597604A NZ597604A (en) 2009-06-24 2010-06-20 Power lead testing system and electronic tag

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2009902913 2009-06-24
AU2009902913A AU2009902913A0 (en) 2009-06-24 Power lead testing system and plug

Publications (1)

Publication Number Publication Date
WO2010148427A1 true WO2010148427A1 (en) 2010-12-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2010/000755 WO2010148427A1 (en) 2009-06-24 2010-06-20 Power lead testing system and electronic tag

Country Status (4)

Country Link
CN (1) CN102803976B (en)
AU (1) AU2010265831A1 (en)
NZ (1) NZ597604A (en)
WO (1) WO2010148427A1 (en)

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CN103399251A (en) * 2013-07-30 2013-11-20 广州视睿电子科技有限公司 USB (Universal Serial Bus) communication line detection device
CN103837782A (en) * 2014-03-27 2014-06-04 上海斐讯数据通信技术有限公司 Detection device of data line
CN105807169A (en) * 2016-05-16 2016-07-27 深圳市西思特科技有限公司 Full-automatic power line comprehensive test machine

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CN109633422B (en) * 2018-12-21 2021-08-17 长沙理工大学 Encrypted chip security testing method based on scanning confusion

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GB2034055A (en) * 1978-08-28 1980-05-29 Woodhead Inc Daniel Continuity Testing Circuit for Three-wire Electrical Power Systems
GB2376304B (en) * 2001-03-30 2004-09-01 Iain Edward Welch Electrical circuit testing aid
US20080061762A1 (en) * 2006-09-13 2008-03-13 Joseph Blanchard Remote Continuity and Cable Identifier and Polarity Checker System and Method

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US6362630B1 (en) * 2000-02-08 2002-03-26 Harris Corporation Electronic test tag for wireline continuity verification
GB2370127B (en) * 2000-12-13 2002-10-30 Interface Technical Components Method of an apparatus for testing wiring
DE602004023614D1 (en) * 2003-07-09 2009-11-26 Isra Juk Electronics Ltd SYSTEM AND METHOD FOR DETECTING ELECTRICAL ERRORS
US6903284B2 (en) * 2003-07-30 2005-06-07 Linda Williams Dunfield Timed switch control for electric devices
US7440246B2 (en) * 2004-10-15 2008-10-21 Leviton Manufacturing Co., Inc. Circuit interrupting apparatus with remote test and reset activation
MY147295A (en) * 2006-04-26 2012-11-30 Fong See Ni A time alert device for use together with an earth leakage protection device

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
GB2034055A (en) * 1978-08-28 1980-05-29 Woodhead Inc Daniel Continuity Testing Circuit for Three-wire Electrical Power Systems
GB2376304B (en) * 2001-03-30 2004-09-01 Iain Edward Welch Electrical circuit testing aid
US20080061762A1 (en) * 2006-09-13 2008-03-13 Joseph Blanchard Remote Continuity and Cable Identifier and Polarity Checker System and Method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103399251A (en) * 2013-07-30 2013-11-20 广州视睿电子科技有限公司 USB (Universal Serial Bus) communication line detection device
CN103837782A (en) * 2014-03-27 2014-06-04 上海斐讯数据通信技术有限公司 Detection device of data line
CN105807169A (en) * 2016-05-16 2016-07-27 深圳市西思特科技有限公司 Full-automatic power line comprehensive test machine
CN105807169B (en) * 2016-05-16 2018-09-28 深圳市西思特科技有限公司 A kind of full-automatic power supply line generalization test machine

Also Published As

Publication number Publication date
CN102803976A (en) 2012-11-28
AU2010265831A1 (en) 2012-02-02
CN102803976B (en) 2015-02-11
NZ597604A (en) 2014-03-28

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