KR101857558B1 - Portable OTDR with LED Concentration Module - Google Patents

Abstract

The present invention relates to a portable OTDR including: one of a plurality of measurement modules having a function of an OTDR (Optical Time Domain Reflectometer) and measuring light of different wavelength bands; and a platform having a loading/unloading section for loading/unloading the one measurement module and controlling the operation of the one measurement module by recognizing a type of the one measurement module mounted on the loading/unloading section. Each of the plurality of measurement modules includes: an internal matching unit for receiving a measurement signal for analyzing a failure of an optical cable to be measured from the platform; a light source for generating an optical signal corresponding to the measurement signal; a photoelectric conversion unit for receiving a reflected light signal reflected by the optical signal to photo-electrically convert the reflection light signal; and a transmission/reception module for transmitting the optical signal generated from the light source to the optical cable to be measured, and integrally formed with a circulator for outputting the reflection light reflected by the optical signal to the photoelectric conversion unit. The internal matching unit transmits the photo-electrically converted reflection signal to the platform, and the platform converts the received reflection light signal into a form that can be processed by a mobile phone and transmits the converted signal to the mobile phone.

Description

Portable OTDR with LED Concentration Module (Portable OTDR with LED Concentration Module)

The present invention relates to a portable OTDR (Optical Time Domain Reflectometer) for analyzing faults in an optical cable to be measured.

Recently, data traffic is increasing exponentially with the increase of Internet users and the emergence of new multimedia services. As a result, the entire network is evolving to send and receive large amounts of data.

In particular, the explosion of the Internet, intranet, and extranet in urban areas has led to an increase in the amount of intra-city network traffic. However, the number of optical fiber lines in Korea is not large. Therefore, it is necessary to construct an optical subscriber network in a manner of sharing an optical fiber line. As a technique for sharing an optical fiber, there is a WDM (Wavelength Division Multiplexing) method.

WDM is a system for simultaneously transmitting a plurality of channels through one optical line using light of different wavelengths. In a wavelength division-multiplexing (WDM) optical communication system, And transmits and receives light having different wavelengths.

In order to maintain and repair such a WDM optical transmission system, there is a need for a portable OTDR that can easily measure obstacle sections in the field on each channel of the optical line.

However, the conventional OTDR has an integral structure in which all the functions such as the driving, signal processing and analysis functions of the optical measuring instrument are provided. Particularly, the size and weight of the light source, the circulator, There is a problem that it is difficult.

Also, since the meter needs to have an OTDR for each wavelength band, if the wavelength band to be measured is increased, the specification of the OTDR is increased accordingly, which causes a burden of replacement of the meter, resulting in a difficulty in cost reduction and a decrease in portability .

1. Domestic Patent Publication No. 2009-0124437

An object of the present invention is to provide a portable OTDR capable of measuring light of various wavelength bands by selectively mounting a plurality of measurement modules (measuring light of different wavelength bands) to a common platform according to the measurement purpose.

In addition, the present invention provides a platform for controlling and signal processing of a measurement module mounted on a platform, integrating a light source, a circulator, and a photoelectric conversion unit included in the measurement module, And a portable OTDR having a smaller size.

Further, the present invention can be applied to a light source that uses a light collecting module using an LED that can realize a line width as a single wavelength of a laser by reducing the beam width by continuously reflecting the LED light source through a condensing module composed of a grating- To provide a portable OTDR.

In order to achieve the above object, there is provided a portable OTDR (Optical Time Domain Reflectometer) according to an embodiment of the present invention. The portable OTDR has an OTDR function and includes one of a plurality of measurement modules for measuring light of different wavelength bands; And a platform for recognizing the type of the one measurement module mounted on the device-dismounting part and controlling the driving of the one measurement module, wherein the plurality of measurement modules An internal matching unit for receiving a measurement signal for analyzing a failure of the optical cable to be measured from the platform; A light source that generates an optical signal corresponding to the measurement signal, a photoelectric conversion unit that receives and reflects the reflected light signal reflected by the generated optical signal, and a photoelectric conversion unit that receives the optical signal generated from the light source into the optical cable to be measured, And a circulator for integrally integrating a circulator for outputting the reflected light reflected by the incident optical signal to the photoelectric conversion unit, wherein the internal matching unit transmits the photoelectrically converted reflected light signal to the platform, Converts the received reflected light signal into a form that can be processed by the mobile and transmits it to the mobile.

Wherein the platform includes: a power supply unit for supplying power to the mounted measurement module when the measurement module is mounted on the dehydrating and attaching unit; A memory for storing a plurality of pieces of drive information corresponding to each type of the plurality of measurement modules; Receiving the identification information from the measurement module to which the power is supplied, recognizing the type, recognizing the type of the mounted measurement module, setting a control mode corresponding to the type of the recognized measurement module, And activates one piece of driving information corresponding to the type of the recognized measuring module and controls driving of the one measuring module.

The platform may further include a signal processing unit for collecting the received reflected light according to a signal processing processor corresponding to the one measurement module and reconstructing the received reflected light into a measurement signal, To the mobile station.

The platform further includes an external matching unit for transmitting the measurement information to the mobile, wherein the mobile uses the transmitted measurement information to calculate a loss measurement value, a splice, and a failure point Lt; / RTI > is analyzed.

Wherein each of the plurality of measurement modules further includes a memory for storing identification information of the corresponding measurement module, wherein when the power is supplied from the platform, the internal matcher transmits identification information output from the memory to the platform, And receives a measurement signal corresponding to the identification information from the platform.

The measurement signal is any one of a pulse signal or a pseudo noise sequence (PN) for analyzing a failure of an optical cable to be measured.

The light source of the light source transmission and reception module includes an LED parallel light module module for emitting the LED light as parallel light and a first lattice reflector for reducing the line width of the parallel light by reflecting the parallel light.

The LED parallel optical module unit includes a plurality of LEDs disposed inside a case that forms an outer appearance of the LED parallel optical module unit, a reflector that reflects the light of the plurality of LEDs, and a surface of the case that corresponds to a traveling direction of the light reflected by the reflector And includes parallel light holes that are round-processed on both sides.

The first lattice reflector of the light-collecting module part has a grating structure having an interval of 10 grooves / mm or less to reduce the line width of parallel light.

The light collecting module further includes a second lattice reflector for changing the traveling direction of the light reflected from the first lattice reflector and reducing the line width.

According to the embodiments of the present invention, it is possible to measure light of various wavelength bands by selectively mounting a plurality of measurement modules (measuring light of different wavelength band) to a common platform according to the measurement purpose.

Further, according to the embodiment of the present invention, the platform includes a configuration for controlling or driving a plurality of measurement modules and a configuration for signal processing, and a light source, a circulator, and a photoelectric conversion unit are integrated into one device Thereby reducing the size and weight of the entire portable OTDR as well as the removable measurement module, thereby facilitating portability. According to the embodiment of the present invention, the measurement information processed by the platform is analyzed by the mobile and the result is displayed, so that the unit price of the portable optical measuring instrument can be reduced.

In addition, by using the condensing module that can realize the line width like the single wavelength of the laser by reducing the beam width by continuously reflecting the LED light source, it is possible to simplify the structure of the source module, This is possible.

1 is a view illustrating a portable OTDR according to a preferred embodiment of the present invention.
2 is a view showing a state in which a measurement module is detached from a portable OTDR according to a preferred embodiment of the present invention.
3 is a functional block diagram of a portable OTDR according to a preferred embodiment of the present invention.
4 is a flowchart illustrating a platform operation of a portable OTDR according to an exemplary embodiment of the present invention.
5 is a flowchart illustrating an operation of a measurement module mounted on a platform according to an exemplary embodiment of the present invention.
6 is a configuration diagram of an LED light collecting module which is a main part of the present invention.
FIG. 7 is a diagram showing a schematic operation relationship of an LED light collecting module, which is a main part of the present invention.
8 is a view showing an example of the operation relationship of the LED light collecting module, which is a main part of the present invention.
FIGS. 9 and 10 are views showing another example of the operation relationship of the LED light collecting module, which is a main part of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Like reference numerals are used for like elements in describing each drawing. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, .

On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention.

The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, a portable OTDR according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings 1 to 5. In the following description, for the sake of clarity of the present invention, a description of what has been conventionally known will be omitted or simplified.

FIG. 1 is a view showing a portable OTDR according to a preferred embodiment of the present invention, and FIG. 2 is a view showing a state in which a measurement module is detached from a portable OTDR according to a preferred embodiment of the present invention.

 1 and 2, a portable OTDR 1000 according to an embodiment of the present invention includes a platform 100 and a measurement module 200, and the platform 100 and the measurement module 200 are connected to each other, Respectively.

In the portable OTDR 1000, the platform 100 functions as a main body. For example, the platform 100 controls the operation of the measurement module 200 and processes the data received from the measurement module 200 to generate measurement information. The platform 100 also supplies power to the measurement module 200 that can be driven by the measurement module 200.

The measurement module 200 is configured to perform an OTDR measurement function for measuring the state of an optical cable using a specific wavelength band and operates under the control of the platform 100 in a state of being mounted on the platform 100.

The measurement module 200 mounted on the platform 100 includes a plurality of OTDR modules 200a, 200b, ..., 200n, each of which performs an OTDR measurement function using light of different wavelength band (e.g., laser light or LED light) ., 200n. The plurality of OTDR modules 200a, 200b, 200n, and the like are classified according to the wavelength band of the output light or the intensity of the output light. For example, the OTDR module 200a includes a first OTDR module 200a for measuring light of a first wavelength band, A second OTDR module 200b for measuring light, a third OTDR module 200c for measuring light in a third wavelength band, a fourth OTDR module 200d for outputting light of a first signal intensity, And a fifth OTDR module 200e for outputting light of a predetermined wavelength. The plurality of OTDR modules 200a, 200b, 200n, and the like may include an OTDR module for measuring light of a first wavelength band and outputting light of a second signal intensity, an OTDR module for measuring light of a second wavelength band, An OTDR module for measuring light of a third wavelength band, and an OTDR module for outputting light of a second signal intensity.

Accordingly, the user who wants to measure light using the portable OTDR 1000 can select one measurement module among the plurality of OTDR modules 200a, 200b, 200n, etc., whose measured wavelength band or optical signal intensity meets the purpose of use .

In response to the measurement modules 200 of different wavelength bands, the platform 100 has a processing process corresponding to all mountable measurement modules 200, that is, an application program, an application program, and parameters, Only a processing process that matches the function or operation characteristic of the apparatus 200 is activated and operated.

In the case where each of the plurality of applicable measurement modules processes the optical signal in the same process, one application program is set up and loaded, and the parameter which differs according to the wavelength band is used in accordance with the measurement module of the corresponding wavelength band can do.

Meanwhile, the portable optical measuring instrument according to the preferred embodiment of the present invention performs complicated arithmetic processing and display in the mobile in cooperation with the mobile when the complicated arithmetic processing and display are required.

Hereinafter, a portable OTDR according to a preferred embodiment of the present invention will be described in more detail with reference to FIG. 3 is a functional block diagram of a portable OTDR according to a preferred embodiment of the present invention.

3, the portable OTDR 1000 includes a platform 100 and a metrology module 200. The platform 100 includes an internal matching unit 110, a control unit 120, a memory 130, a power supply unit 140, a signal processing unit 150, an external matching unit 160, The platform 100 may further include a display unit 180 optionally added by the manufacturer. At this time, the display unit 180 is a simple-function display device for displaying numbers, letters, and the like, and may be a display device composed of seven segments or a plurality of LEDs, for example.

The platform 100 can attach and detach a specific one of the plurality of measurement modules 200a to 200c through the de-adhesion unit 170. [ At this time, the platform 100 may be combined with the mounted specific measurement modules 200a to 200n to be used as an optical meter for the wavelength band of the specific measurement modules 200a to 200n, that is, the portable OTDR 1000 have. Accordingly, when analyzing the failure section of the optical cable 10 to be measured using the portable OTDR 1000, the user can select and use the measurement module according to the wavelength band of the optical cable 10 to be measured.

The internal matching unit 110 provides an interface with the internal matching unit 210 of the measurement module 200 to be mounted and transmits data signals such as a power signal, a control signal, and an optical signal between the platform 100 and the measurement module 200 To send and receive. At this time, the interface with the internal matching unit 210 of the measurement module 200 uses one of the known technologies that can be performed between the two devices, such as a Small Form Factor Pluggable (SFP) system, a USB system, an RS232 system, and a UART system.

The control unit 120 recognizes the type of the mounted measurement module 200 and sets a control mode corresponding to the type of the measurement module 200. When the specific measurement module 200 is mounted, (Parameters or processing processors and parameters) corresponding to the type of the measurement module 200 previously stored in the memory 130 and causes the signal processing unit 150 to operate using the activated driving information. The control unit 120 controls the measurement module 200 according to the set control mode. For example, if the measurement module 200 mounted on the platform 100 is the first OTDR module measuring the first wavelength band, the controller 120 sets the first wavelength band control mode, and according to the set mode, (200).

The memory 130 stores a plurality of pieces of drive information corresponding to each of the plurality of measurement modules 200a to 200c and activates one piece of drive information (i.e., a process processor) by the control unit 120, The control unit 120 provides the signal processing unit 150 with the driving information of the parameter requested by the signal processing unit 150 so that the signal processing unit 150 can use the driving information. The memory 130 stores information received from the mounted measurement module 200.

The power supply unit 140 supplies power to each configuration and the mounted measurement module 200. The power supply 140 may be a battery, a solar cell, or the like.

The signal processing unit 150 controls the operation of the mounted measurement module 200 by using the driving information (including the processing processor) activated by the control unit 120 or the driving information (parameter) provided by the control unit 120, And processes the received optical signal when the optical signal is received from the module 200. The signal processing unit 150 provides the result of the signal processing to the mobile 300 when the external matching unit 160 establishes a communication connection with the mobile 300.

The external matching unit 160 operates under the control of the controller 120 and outputs the measured values obtained by the signal processing unit 150 to raw data or mutual promises (for example, SOR Standard OTDR Record) file format). At this time, the external matching unit 160 may be connected to the earphone jack of the mobile phone 300 using a wired or wireless local communication protocol such as USB, Bluetooth, wifi, or the like and transmit the measured value through the UART communication.

The measurement module 200 includes an internal matching unit 210, a memory 220, an optical adapter 230, and a measurement unit 240.

The internal matching unit 210 interfaces with the internal matching unit 110 of the platform 100 and enables data transmission and reception between the platform 100 and the measurement module 200. At this time, the matching unit 210 of the measurement module may have a plurality of ports for transmitting and receiving signals. The plurality of ports may be respective ports for receiving the power supply signal and the control signal supplied from the platform 100 and for transmitting the identification signal and the electrical signal corresponding to the optical signal to the platform 100.

The internal matching unit 210 receives a power supply signal from the platform 100 and supplies the power supply signal to each configuration of the measurement module 200. The memory 200 receives identification information (identification number or identification code) stored in the memory 220 of the measurement module 200 via the corresponding port on the platform 100 according to a control signal of the platform 100, . At this time, the identification information can be stored and output in various forms according to the number of the measurement modules 200a to 200c, which can be attached to or detached from the platform 100. In one example, the identification information may be stored as binary bit values for different voltage values.

The optical adapter 230 of the measurement module 200 connects the measurement module 200 and the cable 10 to be measured.

The measuring unit 240 measures an optical signal received from the measurement target cable 10 after the optical signal is output to the cable 10 to be measured (ie, the light that the output optical signal returns back, that is, the reflected light).

At this time, the measuring unit 240 is driven by the control unit 120 of the platform 100, and signal processing is performed by the signal processing unit 150 of the platform 100. Accordingly, the measuring unit 240 may have a configuration for minimizing control or driving and a configuration for signal processing, or may not include a configuration for controlling or driving and a configuration for signal processing. Accordingly, the portable OTDR 1000 can be used for portable purposes by reducing the size and weight of the entire portable OTDR 1000 as well as the mounting and demounting modules 200a to 200c.

The measuring unit 240 transmits the optical signal received through the optical adapter 230 to the platform 100 through the internal matching unit 210. At this time, the optical signal can be converted into a digital signal and output.

The measurement unit 240 may be configured in various forms. For example, the measurement unit 240 may include a light source transmission / reception module 20, a light source driver 242, a programmable gain amplifier (PGA) 245, and an analog- .

Also, the light source transmission / reception module 20 may be a module in which the light source 241, the circulator 243, and the photoelectric conversion unit 244 are integrally integrated. Accordingly, the size of the measurement module 200 is reduced, thereby reducing the size and weight of the entire portable OTDR.

The light source 241 supplies light through an optical cable, and the light to be supplied at this time is one of laser light, visible light and the like. The light source 241 is composed of a light diode (LD), a laser generator, an LED, or the like in accordance with the supplied light.

The light sources 241 emit light signals of different wavelength bands or emit light of different signal intensities (output intensities) or emit light of different wavelength bands and different signal intensities. That is, the light source 241 emits an optical signal of the first wavelength band when used in the first OTDR module 200a, and an optical signal of the second wavelength band when used in the second OTDR module 200b. Emits an optical signal of a first signal intensity when used in the fourth OTDR module 200d and emits an optical signal of a third signal intensity in a second wavelength band when used in the sixth OTDR module .

The control unit 120 of the platform 100 transmits the measurement signal corresponding to the recognized type to the mounted measurement module 200 and the optical driver 242 receiving the measurement signal outputs the optical signal corresponding to the measurement signal, (241). Here, the measurement signal may be any one of a pulse signal for analyzing faults of the optical cable 10 to be measured or a pseudo noise sequence (PN).

A circulator 243 is provided between the light source 241 and the PD 244 and can change the optical path under the control of the control unit 120 of the platform 100. More specifically, the ciculator 243 connects the optical path generated by the optical source 241 to be incident on the optical adapter 230 connected to the optical cable 10 to be measured, 10 may be reflected by the PD 244 to be coupled to the optical path.

The PD 244 receives the reflected light reflected by the measurement target optical cable 10 and outputs an electrical signal corresponding to the received reflected light. The PGA 245 amplifies the electrical signal corresponding to the reflected light output from the PD 244 according to a predetermined gain value. The ADC 246 samples an electrical signal corresponding to the amplified reflected light, . ≪ / RTI >

The control unit 120 of the platform 100 can receive the digital signal finally output from the ADC 246 through the matching unit 210 of the mounted measurement module 200a and the matching unit 110 of the platform 100 have.

The control unit 120 of the platform 100 converts the digital signal received corresponding to the reflected light into a measurement signal (pulse signal or PN signal) in accordance with the wavelength band of the recognized measurement module 200a, that is, The signal processing unit 150 can be controlled to be restored to the normal state.

At this time, the signal processing unit 150 may include a signal processing processor corresponding to each of the plurality of measurement modules 200a to 200c. That is, the signal processing processor may be an individual OTDR processor for processing optical signals received from the OTDR measurement modules 200a through 200c.

The signal processing unit 150 can process the optical signal received by the measurement module 200a by the above-described signal processing into measurement information of a form capable of being analyzed and expressed by the mobile 300. [ The control unit 120 may transmit the measurement information signal-processed by the signal processing unit 150 to the mobile 300 through the external matching unit 160.

Here, the signal-processed measurement information may be information related to the generation of the measurement signal (pulse signal or PN signal) and information related to the processing of the reflected light. Specifically, the measurement information may be various information generated during the generation and processing from the time when the measurement signal (pulse signal or PN signal) is generated until the time when the reflected light is restored to the measurement signal.

The mobile device 300 refers to a terminal having a data communication function, such as a smart phone, a tablet PC, a notebook, and a PDA. The mobile 300 analyzes the measurement information received from the measurement module 200 and analyzes loss measurement values, splices, and failure points of the measurement target optical cable 10 by unit length, and displays the analyzed result on a GUI or the like do. At this time, the mobile 300 must have an application for analyzing measurement information. By analyzing the measurement information signal-processed by the platform in the mobile device 300 and displaying the result, the cost of the portable optical measuring device can be reduced.

4 is a flowchart illustrating a platform operation of a portable OTDR according to an exemplary embodiment of the present invention. For an understanding of the description, it can be explained with reference to Figs.

When the user mounts the specific measurement module 200 on the platform 100, the platform 100 senses the mounting of the specific measurement module 200 (S401) and supplies power to the mounted measurement module 200 S402).

Next, the measurement module 200 operates on the power provided by the platform 100 and provides its own unique identification information to the platform 100. Accordingly, the platform 100 receives the identification information from the measurement module 200 (S403), reads the received identification information, and identifies the type or type of the mounted measurement module 200 (S404).

Then, the platform 100 sets a control mode corresponding to the type of the identified measurement module 200 (S405), and executes a drive corresponding to the type of the measurement module 200 identified in the drive information stored in the memory 130 Information is activated (S406).

The platform 100 transmits a measurement signal for analyzing the failure of the optical cable 10 to be measured to the measurement module 200 (S407). At this time, the measurement module 200 generates an optical signal corresponding to the measurement signal as the measurement target optical cable 10, receives the reflected light corresponding to the generated optical signal, and transmits the reflected light to the platform 100. At this time, the measurement signal is a pulse signal or a pseudo noise signal.

Next, the platform 100 receives the optical signal from the measurement module 200 (S408) and drives the signal processing processor corresponding to the type of the measurement module 200 through the signal processing unit 150 to reflect the optical signal (S409).

In step S410, the control unit 120 transmits measurement information including various information generated until the time when the measurement signal is generated, to the time when the reflected light is restored to the measurement signal, to the mobile 300 (S410). The mobile 300 analyzes loss measurement values, splices, and failure points of the optical cable to be measured by unit length using the received measurement information, and displays the result through a display unit (not shown).

On the other hand, one of the plurality of measurement modules 200a to 200c operates as shown in FIG. 5 when mounted on the platform 100. 5 is a flowchart illustrating an operation of a measurement module mounted on a platform according to an exemplary embodiment of the present invention.

5, when the measurement module 200 is mounted on the platform (S501), the measurement module 200 receives power from the platform 100 (S502). When the measurement module 200 is activated by the power supply, the measurement module 200 transmits the stored identification information to the platform 100 (S503).

At this time, the controller 120 of the platform 100 recognizes the type of the measurement module using the received identification number, sets the control mode corresponding to the recognized type, and analyzes the failure section of the optical cable 10 to be measured To the measurement module.

The measurement signal transmitted from the control unit 120 is received by the light source driver 242 of the measurement module 200 in step S504 and the light source driver 242 supplies the optical signal of the corresponding wavelength band corresponding to the received measurement signal to the measurement target And drives the light source 241 to be generated by the optical cable 10 (S505).

The measurement module 200 converts the received reflected light into a digital signal and transmits it to the platform 100 (S507) when reflected light is received from the optical cable 10 to be measured corresponding to the generated optical signal (S506). Next, the operation of the platform 100 receiving the optical signal may be performed according to the flowchart of FIG. On the other hand, when the specific measurement module 200 is removed from the platform 100, the function of the OTDR can be stopped or terminated.

As described above, the plurality of measurement modules 200a to 200c having different wavelength bands generate an optical signal corresponding to the measurement signal received from the platform 100 as the measurement target optical cable 10, Since the configuration of each of the measurement modules 200a to 200c is simplified and is selectively used as an OTDR using the common platform 100, it is possible to measure various wavelength bands have.

In the meantime, the light source of the OTDR according to the present invention may be a light collecting module using LEDs as shown in FIG. 6 to FIG.

Specifically, the light-collecting module using LEDs is a module capable of realizing the line width as a single wavelength of the laser by continuously reducing the beam width by continuously reflecting the LED light source through the light-collecting module composed of the grating- Module 70).

Referring to FIG. 6, the light collecting module 70 includes an LED parallel optical module unit 20 and a light condensing module unit 30. The light collecting module 70 irradiates the parallel light irradiated from the LED parallel optical module 20 to the outside through the light collecting module unit 30 in a state in which the line width is remarkably reduced.

Fig. 7 is a plan view showing the movement path of the LED light in Fig. 6. Fig.

8, the LED parallel optical module unit 20 includes a LED (0) and a reflector 23, and the LED 1 reflects the light of the LED (1) And the parallel light is generated on the front surface of the reflector 23 by reflecting the light on the reflector 23. A plurality of LEDs 1 disposed inside a case 21 forming an outer appearance of the LED parallel optical module unit 20, a reflector 23 for reflecting light of the plurality of LEDs 1, And parallel light holes 22 formed on the surface of the case 21 corresponding to the traveling direction of the light reflected by the reflector 23 and rounded on both sides.

The LED 1 is installed on the inclined portion 24 formed inside the case 21 as shown in FIG. 8 to irradiate the LED 23 with the reflector 23. Here, the LED light is reflected by the reflector 23 and travels forward to the reflector 23. At this time, the parallel light holes 22 are formed in the case 21 so as to emit the LED light in parallel before the LED light exits the case 21. [ (21).

The parallel light holes 22 are correspondingly rounded so that both ends of the emitted LED light are emitted in a smooth curve.

The light collecting module 30 may include a first lattice reflector 32 that reflects parallel light and reduces a line width of parallel light as shown in FIG. 8, or a first lattice reflector 32 and a first lattice reflector 31 And a second grating reflector 32 for changing the traveling direction of the light reflected from the first grating reflector 32 and reducing the line width.

The first lattice reflector 31 or the first lattice reflector 31 and the second lattice reflector 32 of the light-collecting module 30 may be spaced at intervals of 10 grooves / mm or less so as to reduce the line width or line width of parallel light. The structure may be the same as that of the first asymmetric grating portion and the second asymmetric grating portion of Patent Document 10-1327918 (condensing system).

The light collecting module 70 having such a structure includes the LED parallel optical module unit 20 and the light collecting module unit 30 so that the light source generated in the LED parallel optical module unit 20 passes through the light collecting module unit 30 It can be realized as a laser line width having a specific wavelength exhibiting a characteristic in which the line width of light is remarkably reduced.

In other words, by continuously reflecting the LED light source on the UR grating structure, it is possible to realize a line width equal to a single wavelength of the laser by innovatively reducing the beam width.

The light collecting module 70 may be used as an optical communication fiber connector, an adapter, an optical module for a collimator, and an LED laser module.

On the other hand, if the grating condition of the first lattice reflector 31 or the first lattice reflector 31 and the second lattice reflector 32 is 22 grooves / mm and Blaze Angle 15.962 deg, the dispersion of power due to the diffraction phenomenon appear. In general grating (100 grooves / mm or more), diffraction phenomenon is strong and power dispersion is severe, and there is no phenomenon of wide width reduction (Blaze Angle does not decrease at more than 20 deg). However, when the grating condition has an interval of 10 grooves / mm or less, the power dispersion due to the diffraction phenomenon does not appear.

It will be apparent to those skilled in the relevant art that various modifications, additions and substitutions are possible, without departing from the spirit and scope of the invention as defined by the appended claims. The appended claims are to be considered as falling within the scope of the following claims.

1000: Portable OTDR 100: Platform
200a to 200c:
110, 210: matching unit 130, 220: memory
120: control unit 140: power supply unit
150: signal processing unit 160: external matching unit
170: de-adhered portion 10: optical cable
230: Optical adapter 240:
241: Light source 242: Light source driver
243: circulator 244: photoelectric conversion unit
20: Light source transmission / reception module
245: Programmable Gain Amplifier (PGA)
246: Analog-to-digital converter (ADC)

Claims (10)

One of a plurality of measurement modules having OTDR (Optical Time Domain Reflectometer) functions for measuring light of different wavelength bands;
And a platform for recognizing the type of the one measurement module mounted on the deck and attachment unit and controlling the driving of the one measurement module,
Each of the plurality of measurement modules
An internal matching unit for receiving a measurement signal for analyzing a failure of the optical cable to be measured from the platform;
A light source that generates an optical signal corresponding to the measurement signal, a photoelectric conversion unit that receives and reflects the reflected light signal reflected by the generated optical signal, and a photoelectric conversion unit that receives the optical signal generated from the light source into the optical cable to be measured, And a circulator for outputting the reflected light reflected by the incident optical signal to the photoelectric conversion unit is integrally integrated,
Wherein the internal matching unit transmits the photo-converted reflected light signal to the platform, and the platform converts the received reflected light signal into a form that can be processed by the mobile and transmits the converted reflected light signal to the mobile,
The light source of the light source transmission /
A plurality of LEDs 1 disposed inside the case 21 and a reflector 23 for reflecting light of the plurality of LEDs 1 and a case 21 corresponding to the traveling direction of the light reflected by the reflector 23 An LED parallel optical module part 20 formed on a surface of the parallel light hole 22 and having parallel sides on both sides thereof and irradiating parallel light through the parallel light hole 22;
A first lattice reflector 31 for reflecting the parallel light to reduce the line width of the parallel light and a second lattice reflector 32 for changing the traveling direction of the light reflected from the first lattice reflector 31 and reducing the line width And a condensing module (70) including the condensing module part (30).
The method according to claim 1,
The platform comprises:
A power supply unit for supplying power to the mounted measurement module when the measurement module is mounted on the detachable unit;
A memory for storing a plurality of pieces of drive information corresponding to each type of the plurality of measurement modules; And
Receiving the identification information from the measuring module to which the power is supplied, recognizing the type, recognizing the type of the mounted measuring module, setting a control mode corresponding to the type of the recognized measuring module, And a control unit for activating one driving information corresponding to the type of the measurement module and controlling driving of the one measurement module.
3. The method of claim 2,
The platform comprises:
And a signal processing unit for collecting the reflected light according to a signal processing processor corresponding to the one measurement module and restoring the reflected light into a measurement signal,
Wherein,
And transmits the measurement information generated from the generation of the measurement signal to the restoration point of the reflected light to the mobile.
The method of claim 3,
The platform comprises:
And an external matching unit for transmitting the measurement information to the mobile,
Wherein the mobile analyzes at least one of a loss measurement value, a splice, and a failure point for each unit length of the optical cable to be measured by using the measurement information received from the external matching unit.
The method of claim 1, wherein
Wherein each of the plurality of measurement modules includes:
And a memory for storing identification information of the measurement module,
The internal matching portion
Wherein when the power is supplied from the platform, identification information output from the memory is transmitted to the platform, and a measurement signal corresponding to the identification information is received from the platform.
The method according to claim 1,
Wherein the measurement signal is a pulse signal or a pseudo noise sequence (PN) for analyzing a failure of an optical cable to be measured.
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