US20140211201A1 - Fiber fault sniffer - Google Patents
Fiber fault sniffer Download PDFInfo
- Publication number
- US20140211201A1 US20140211201A1 US13/755,402 US201313755402A US2014211201A1 US 20140211201 A1 US20140211201 A1 US 20140211201A1 US 201313755402 A US201313755402 A US 201313755402A US 2014211201 A1 US2014211201 A1 US 2014211201A1
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- United States
- Prior art keywords
- signal
- hand held
- fiber optic
- optic cables
- audible
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- 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.)
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
- G01M11/33—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter being disposed at one fibre or waveguide end-face, and a light receiver at the other end-face
- G01M11/335—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter being disposed at one fibre or waveguide end-face, and a light receiver at the other end-face using two or more input wavelengths
Definitions
- This disclosure relates to fiber optic cable testing, and more particularly to a hand held fault locating device for use with fiber optic cable testing.
- a hand held fiber fault detection tool in the form of an inexpensive, easy to carry, pen-shaped device that detects and alerts user of defects in the fiber.
- the device can also detect whether the line carries live signals or no signal.
- FIG. 1 is a view of a hand held device in accordance with the disclosure
- FIG. 2 is a block diagram of the functional components of the device of FIG. 1 ;
- FIG. 3 is a view of a hand held device that provides an optional specific wavelength light source
- FIG. 4 is a block diagram of the optional specific wavelength light source of FIG. 3 ;
- FIG. 5 is a view of a hand held device that provides an optional specific wavelength light sensor
- FIG. 6 is a block diagram of the optional specific wavelength light sensor of FIG. 5 ;
- FIG. 7 is a block diagram of an alternative multiple wavelength light sensor.
- FIG. 8 is a view of an alternative hand held device that provides additional data display.
- the system comprises a hand held device that contains a photodiode and microprocessor to detect and analyze the signal on the surface of a fiber optic cable.
- the microprocessor By scanning on the skin of fiber optic cable with the tip of the device, the microprocessor analyzes the pattern of the signal and alerts the user when it detects an abnormal signal (defect).
- the device 10 comprises a pen-like instrument body 12 having a sensor end 14 , an operational mode switch 22 may be provided for switching between live signal detection mode, for the purpose of detecting whether a fiber is carrying live signals, or fault detection mode, for determining the presence of faults in the cable or connectors, a detect operation button 18 , a training operation mode button 20 , and a LED 16 for providing visual indication of test results.
- LED 16 may comprise, for example, a tri-color LED to indicate live (as in green color) or dead (as in amber) if the live signal detection mode is selected in operational mode switch 22 or to indicate fault (as in amber) or normal (as in green) if fault detection mode is selected in operational mode switch 22 .
- An audio generation element such as a speaker, may also he provided in the device for generating audible signals 23 to report results.
- a lens may be provided at the sensor end 14 , internal to the device, for focusing the signal to the internal detection components.
- FIG. 2 is a block diagram of the functional components of the device of FIG. 1 , wherein a photo diode 24 is connected via amplifier 26 to an A to D converter 28 (ADC).
- a microprocessor 30 receives the output of ADC 28 , and provides input to digital to analog converter 32 (DAC).
- the DAC 32 drives speaker 36 to provided detection reports in audible form or operational information.
- Detect control 38 , training control 40 and mode control 42 (which may suitably comprise switches 18 , 20 , and 22 ) provide input to DID (Digital Input Output) 44 , which drives LED 16 ′ (and in the configuration of FIG. 8 , display 60 ).
- DID Digital Input Output
- a mode switch 42 in FIG. 2 (and 22 in FIG. 1 ) is operated to set the operation mode between live signal detection or fault detection mode.
- the device If set to live signal detection mode by operation of the mode switch to the detection mode, the device operates as a signal detection device, wherein input from photo diode 24 is supplied via amplifier 26 to ADC 28 . If a sufficient level of optical signal is detected, then the microprocessor 30 sends a signal to DIO 44 to illuminate the ‘live’ mode of LED 16 ′, and also to generate a sound via speaker 36 , supplied an output signal from DAC 32 .
- LED 16 ′ is implemented in a particular embodiment as a tri-color LED, wherein, for example, the color green is displayed to indicate that the device is detecting a live signal, or the color red is displayed to indicate that no signal is being detected.
- the ‘live’ portion segment would be illuminated.
- Audible signals may also be provided via the speaker to report test results, for example, a ‘whimpering’ sound may be generated to indicate that no live signal is detected on the fiber optic cable.
- the device When the device is set to fault detection mode, by operation of the mode switch, the device detects faults in the signal detected on the surface of the fiber optic cable. This fault may be determined based on drop off or increase of signal level of the detected signal, for example.
- the LED 22 In the fault detection mode, the LED 22 is driven to a color, for example, green, when no faults are being detected, and changes to a different color, for example, red, when a fault is detected.
- the LED 16 ′ is provided as separately illuminated segments, the ‘fault’ portion segment would be illuminated. Further, an audible signal such as a ‘woof! woof!’ sound may be generated via speaker 36 when a fault is detected.
- the fault/live detection may also be provided as separate portions of an LED section, or as separate LEDs.
- the training button 20 is depressed, while the sensor tip is held to or moved along a cable with a known acceptable non-fault signal, and the LED 16 ′ is illuminated in a color to represent training mode, such as amber.
- the acceptable signal level is then stored by the microprocessor and used in later testing to compare against, and any significant variation therefrom being determined to be an indication of a fault.
- a hand held device is provided to search for faults on fiber optic cables.
- a version or versions with separate (or unified) sources and sensors for generating and detecting different wavelengths of light may be provided.
- FIG. 3 and FIG. 4 a representation of a hand held device for providing different wavelength optical test signals and a block diagram of the device for providing different wavelength optical test signals for applying to a fiber optic cable under test, power on switch 21 activates a microprocessor 46 which generates a test signal which supplied via DAC 48 and amplifier 50 causes light emitter 52 (suitably an appropriate wavelength LED), to generate an optical signal, which may then be provided to the fiber under test.
- Separate optical source probes 51 containing the light emitter 50 are available, provided in different colors to the exterior case of the probe to assist in identifying which wavelength of light the particular probe is designed for, designed for typical communication light wavelengths. Suitable example colors are black probe for visible light, red probe for 1625 nm, orange probe for 1550 nm, green probe for 1310 nm and blue probe for 850 nm. These colors are provided as particular examples, and different color schemes may also be employed. Alternatively, plural sources 52 may be provided in a single hand held probe to generate multiple wavelengths of light, either simultaneously or selectively one or more at a time
- FIGS. 5 and 6 A more simplified detector 54 is illustrated in FIGS. 5 and 6 , wherein a detector 24 ′ is provided in a case 54 , with a detect LED 16 ′ and an audible indicator 23 ′.
- the detector 24 ′ supplies ADC 28 ′ via amplifier 26 ′, and the microprocessor 30 ′ detects the presence of signal, illuminating the LED 16 ′ and operating the speaker 36 ′ via DAC 32 ′ when signal is detected.
- FIG. 7 An embodiment of the tester designed to detect different wavelength of light is shown in FIG. 7 , wherein a detector 24 ′′ (which may be configured as a hand held probe 54 ′) is connected via a coupler 56 to amplifiers 25 , 27 (and additional optional amplifiers, 29 , 29 ′ . . . ), supplied via ADC 28 ′′ to microprocessor 30 ′′.
- the microprocessor controls LED 22 ′′ and speaker 36 ′′ via DAC 32 ′′, and illuminates the LED 16 ′′ in different colors to indicate the wavelength of light that has been detected, which is particularly useful for multiple wavelength detection in a single probe.
- Different audible signals may be generated via speaker 36 ′′ depending on the detected wavelength, such as the following example detection scenarios:
- the amplifiers 25 , 27 , 29 , etc. provide detection at the specific individual wavelengths, the number of such amplifiers 25 , 27 , 29 , 29 ′, etc. depending on the number of different wavelengths that are to be detected, 4 such amplifiers being provided in the illustrated embodiment to detect 1625 nm, 1550 nm, 1310 nm and 850 nm.
- FIG. 8 illustrates an alternate hand held probe body 58 , that includes a display 60 , suitable for displaying additional information, for example, fault codes, such as 0 for normal; 1 for unusually high signal (which might be caused by leaking); 2 for weak signal (indicating leaking at other locations); 3 for no signal; 4 for unknown error; etc.
- fault codes such as 0 for normal; 1 for unusually high signal (which might be caused by leaking); 2 for weak signal (indicating leaking at other locations); 3 for no signal; 4 for unknown error; etc.
- an optical fiber cable fault detector that provides detection of whether a cable is carrying live signal, detection of faults in the fiber, and detection of signal wavelengths.
- a multiple wavelength test signal source is also provided with interchangeable wavelength source probes.
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
Abstract
Description
- This disclosure relates to fiber optic cable testing, and more particularly to a hand held fault locating device for use with fiber optic cable testing.
- Defects in fiber optic cables degrade the performance of the signal. Considering fiber as a pipe of communication signals, low output and defects in the fiber means there is a leaking point. Current devices for detecting fiber leakage are large and expensive, making them impractical for use in certain situations. For example, detecting fault in closed tight spaces such as communication closets and behind walls, or along fiber risers in data centers, requires a small tool that can easily fit in hand.
- In accordance with the disclosure, a hand held fiber fault detection tool is provided in the form of an inexpensive, easy to carry, pen-shaped device that detects and alerts user of defects in the fiber. The device can also detect whether the line carries live signals or no signal.
- Accordingly, it is an advantage of the present disclosure to provide an improved fault locater device for use with fiber optic cables
- It is a further advantage of the present disclosure to provide an improved method and apparatus to detect and report fiber optic cable properties.
- It is yet another advantage of the present disclosure to provide an improved fiber optic cable testing tool that detects faults and provides a visual and/or audible report of the results.
- The subject matter of the present technology is particularly pointed out and distinctly claimed in the concluding portion of this specification. However, both the organization and method of operation, together with further advantages and embodiments thereof, may best be understood by reference to the following description taken in connection with accompanying drawings wherein like reference characters refer to like elements.
-
FIG. 1 is a view of a hand held device in accordance with the disclosure; -
FIG. 2 is a block diagram of the functional components of the device ofFIG. 1 ; -
FIG. 3 is a view of a hand held device that provides an optional specific wavelength light source; -
FIG. 4 is a block diagram of the optional specific wavelength light source ofFIG. 3 ; -
FIG. 5 is a view of a hand held device that provides an optional specific wavelength light sensor; -
FIG. 6 is a block diagram of the optional specific wavelength light sensor ofFIG. 5 ; -
FIG. 7 is a block diagram of an alternative multiple wavelength light sensor; and -
FIG. 8 is a view of an alternative hand held device that provides additional data display. - The system according to a preferred embodiment of the present disclosure comprises a hand held device that contains a photodiode and microprocessor to detect and analyze the signal on the surface of a fiber optic cable. By scanning on the skin of fiber optic cable with the tip of the device, the microprocessor analyzes the pattern of the signal and alerts the user when it detects an abnormal signal (defect).
- Referring now to
FIG. 1 , a representation of a hand held device in accordance with the disclosure, thedevice 10 comprises a pen-like instrument body 12 having asensor end 14, anoperational mode switch 22 may be provided for switching between live signal detection mode, for the purpose of detecting whether a fiber is carrying live signals, or fault detection mode, for determining the presence of faults in the cable or connectors, adetect operation button 18, a trainingoperation mode button 20, and aLED 16 for providing visual indication of test results.LED 16 may comprise, for example, a tri-color LED to indicate live (as in green color) or dead (as in amber) if the live signal detection mode is selected inoperational mode switch 22 or to indicate fault (as in amber) or normal (as in green) if fault detection mode is selected inoperational mode switch 22. An audio generation element, such as a speaker, may also he provided in the device for generatingaudible signals 23 to report results. Not visible inFIG. 1 , a lens may be provided at thesensor end 14, internal to the device, for focusing the signal to the internal detection components. -
FIG. 2 is a block diagram of the functional components of the device ofFIG. 1 , wherein aphoto diode 24 is connected viaamplifier 26 to an A to D converter 28 (ADC). Amicroprocessor 30 receives the output ofADC 28, and provides input to digital to analog converter 32 (DAC). TheDAC 32 drivesspeaker 36 to provided detection reports in audible form or operational information. Detectcontrol 38,training control 40 and mode control 42 (which may suitably compriseswitches LED 16′ (and in the configuration ofFIG. 8 , display 60). - In operation a
mode switch 42 inFIG. 2 (and 22 inFIG. 1 ) is operated to set the operation mode between live signal detection or fault detection mode. - If set to live signal detection mode by operation of the mode switch to the detection mode, the device operates as a signal detection device, wherein input from
photo diode 24 is supplied viaamplifier 26 toADC 28. If a sufficient level of optical signal is detected, then themicroprocessor 30 sends a signal toDIO 44 to illuminate the ‘live’ mode ofLED 16′, and also to generate a sound viaspeaker 36, supplied an output signal fromDAC 32.LED 16′ is implemented in a particular embodiment as a tri-color LED, wherein, for example, the color green is displayed to indicate that the device is detecting a live signal, or the color red is displayed to indicate that no signal is being detected. In the case where theLED 16′ is provided as separately illuminated segments, the ‘live’ portion segment would be illuminated. Audible signals may also be provided via the speaker to report test results, for example, a ‘whimpering’ sound may be generated to indicate that no live signal is detected on the fiber optic cable. - When the device is set to fault detection mode, by operation of the mode switch, the device detects faults in the signal detected on the surface of the fiber optic cable. This fault may be determined based on drop off or increase of signal level of the detected signal, for example. In the fault detection mode, the
LED 22 is driven to a color, for example, green, when no faults are being detected, and changes to a different color, for example, red, when a fault is detected. In the case where theLED 16′ is provided as separately illuminated segments, the ‘fault’ portion segment would be illuminated. Further, an audible signal such as a ‘woof! woof!’ sound may be generated viaspeaker 36 when a fault is detected. The fault/live detection may also be provided as separate portions of an LED section, or as separate LEDs. - To train or calibrate the device, the
training button 20 is depressed, while the sensor tip is held to or moved along a cable with a known acceptable non-fault signal, and theLED 16′ is illuminated in a color to represent training mode, such as amber. The acceptable signal level is then stored by the microprocessor and used in later testing to compare against, and any significant variation therefrom being determined to be an indication of a fault. - Thus, a hand held device is provided to search for faults on fiber optic cables.
- Additional embodiments or options may be provided. A version or versions with separate (or unified) sources and sensors for generating and detecting different wavelengths of light may be provided. Referring to
FIG. 3 andFIG. 4 , a representation of a hand held device for providing different wavelength optical test signals and a block diagram of the device for providing different wavelength optical test signals for applying to a fiber optic cable under test, power onswitch 21 activates amicroprocessor 46 which generates a test signal which supplied viaDAC 48 andamplifier 50 causes light emitter 52 (suitably an appropriate wavelength LED), to generate an optical signal, which may then be provided to the fiber under test. Separateoptical source probes 51 containing thelight emitter 50 are available, provided in different colors to the exterior case of the probe to assist in identifying which wavelength of light the particular probe is designed for, designed for typical communication light wavelengths. Suitable example colors are black probe for visible light, red probe for 1625 nm, orange probe for 1550 nm, green probe for 1310 nm and blue probe for 850 nm. These colors are provided as particular examples, and different color schemes may also be employed. Alternatively,plural sources 52 may be provided in a single hand held probe to generate multiple wavelengths of light, either simultaneously or selectively one or more at a time - A more
simplified detector 54 is illustrated inFIGS. 5 and 6 , wherein adetector 24′ is provided in acase 54, with adetect LED 16′ and anaudible indicator 23′. Thedetector 24′ suppliesADC 28′ viaamplifier 26′, and themicroprocessor 30′ detects the presence of signal, illuminating theLED 16′ and operating thespeaker 36′ viaDAC 32′ when signal is detected. - An embodiment of the tester designed to detect different wavelength of light is shown in
FIG. 7 , wherein adetector 24″ (which may be configured as a hand heldprobe 54′) is connected via acoupler 56 toamplifiers 25, 27 (and additional optional amplifiers, 29, 29′ . . . ), supplied via ADC 28″ tomicroprocessor 30″. The microprocessor controlsLED 22″ andspeaker 36″ viaDAC 32″, and illuminates theLED 16″ in different colors to indicate the wavelength of light that has been detected, which is particularly useful for multiple wavelength detection in a single probe. Different audible signals may be generated viaspeaker 36″ depending on the detected wavelength, such as the following example detection scenarios: -
- 1625 nm detected, red LED, 4 beeps via speaker
- 1550 nm detected, orange LED, 3 beeps via speaker
- 1310 nm detected, green LED, 2 beeps via speaker
- 850 nm detected, blue LED, 1 beep via speaker
- In operation the
amplifiers such amplifiers -
FIG. 8 illustrates an alternate hand heldprobe body 58, that includes adisplay 60, suitable for displaying additional information, for example, fault codes, such as 0 for normal; 1 for unusually high signal (which might be caused by leaking); 2 for weak signal (indicating leaking at other locations); 3 for no signal; 4 for unknown error; etc. - Accordingly, multiple embodiments are provided of an optical fiber cable fault detector that provides detection of whether a cable is carrying live signal, detection of faults in the fiber, and detection of signal wavelengths. A multiple wavelength test signal source is also provided with interchangeable wavelength source probes.
- While plural embodiments of the technology have been shown and described, it will be apparent to those skilled in the art that many changes and modifications may be made without departing from the broader aspects. The appended claims are therefore intended to cover all such changes and modifications as fall within the true spirit and scope of the technology.
Claims (20)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/755,402 US8810783B1 (en) | 2013-01-31 | 2013-01-31 | Fiber fault sniffer |
CA2841466A CA2841466A1 (en) | 2013-01-31 | 2014-01-31 | Hand held fault detector for use with fiber optic cables |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US13/755,402 US8810783B1 (en) | 2013-01-31 | 2013-01-31 | Fiber fault sniffer |
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US20140211201A1 true US20140211201A1 (en) | 2014-07-31 |
US8810783B1 US8810783B1 (en) | 2014-08-19 |
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US13/755,402 Expired - Fee Related US8810783B1 (en) | 2013-01-31 | 2013-01-31 | Fiber fault sniffer |
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US (1) | US8810783B1 (en) |
CA (1) | CA2841466A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
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CN104483106A (en) * | 2014-12-31 | 2015-04-01 | 华中科技大学 | Online flip LED chip detection device |
CN106124526A (en) * | 2016-08-12 | 2016-11-16 | 国家电网公司 | A kind of aerial optical cable line fault searches equipment |
US20180231592A1 (en) * | 2014-08-20 | 2018-08-16 | At&T Intellectual Property I, L.P. | Methods, Systems, and Products for Power Management in Cable Assemblies |
EP3364562A1 (en) * | 2017-02-21 | 2018-08-22 | Fluke Corporation | System and method for non-intrusive detection of optical energy leakage from optical fibers |
GB2585058A (en) * | 2019-06-27 | 2020-12-30 | British Telecomm | Method and system of locating a fault in an optical fibre |
CN114071262A (en) * | 2020-08-05 | 2022-02-18 | 华为技术有限公司 | Optical network system |
Family Cites Families (8)
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US5485084A (en) * | 1993-05-10 | 1996-01-16 | The Boeing Company | Apparatus and method for detecting structural cracks using a movable detector |
US5809185A (en) * | 1996-04-26 | 1998-09-15 | Mitchell; Ralph | Sensor for detecting microorganisms |
US6973145B1 (en) * | 2000-09-01 | 2005-12-06 | Ut-Battelle, Llc | Digital-data receiver synchronization method and apparatus |
US20080247430A1 (en) * | 2006-07-18 | 2008-10-09 | Shengzhong Zhang | Laser wavelength stabilization |
US7826043B1 (en) | 2008-05-15 | 2010-11-02 | Photonix Technologies, Inc. | Optical leak detection instrument |
US10456036B2 (en) * | 2008-12-23 | 2019-10-29 | Roche Diabetes Care, Inc. | Structured tailoring |
MX2013001641A (en) * | 2010-08-10 | 2013-07-29 | Cooper Technologies Co | Apparatus and method for mounting an overhead device. |
US8873900B2 (en) * | 2011-04-21 | 2014-10-28 | Medtronic Vascular, Inc. | Balloon catheter with integrated optical sensor for determining balloon diameter |
-
2013
- 2013-01-31 US US13/755,402 patent/US8810783B1/en not_active Expired - Fee Related
-
2014
- 2014-01-31 CA CA2841466A patent/CA2841466A1/en not_active Abandoned
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20180231592A1 (en) * | 2014-08-20 | 2018-08-16 | At&T Intellectual Property I, L.P. | Methods, Systems, and Products for Power Management in Cable Assemblies |
US10502770B2 (en) * | 2014-08-20 | 2019-12-10 | At&T Intellectual Property I, L.P. | Methods, systems, and products for power management in cable assemblies |
CN104483106A (en) * | 2014-12-31 | 2015-04-01 | 华中科技大学 | Online flip LED chip detection device |
CN106124526A (en) * | 2016-08-12 | 2016-11-16 | 国家电网公司 | A kind of aerial optical cable line fault searches equipment |
EP3364562A1 (en) * | 2017-02-21 | 2018-08-22 | Fluke Corporation | System and method for non-intrusive detection of optical energy leakage from optical fibers |
GB2585058A (en) * | 2019-06-27 | 2020-12-30 | British Telecomm | Method and system of locating a fault in an optical fibre |
GB2585058B (en) * | 2019-06-27 | 2021-09-29 | British Telecomm | Method and system of locating a fault in an optical fibre |
CN114071262A (en) * | 2020-08-05 | 2022-02-18 | 华为技术有限公司 | Optical network system |
Also Published As
Publication number | Publication date |
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CA2841466A1 (en) | 2014-07-31 |
US8810783B1 (en) | 2014-08-19 |
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