CN103217215B - Automatic calibration method for optical power meter - Google Patents
Automatic calibration method for optical power meter Download PDFInfo
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- CN103217215B CN103217215B CN201310068772.4A CN201310068772A CN103217215B CN 103217215 B CN103217215 B CN 103217215B CN 201310068772 A CN201310068772 A CN 201310068772A CN 103217215 B CN103217215 B CN 103217215B
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Abstract
The invention provides a kind of Automatic calibration method for optical power meter, programmable calculator is the control module of core, be connected with automatic calibration unit, described automatic calibration unit by light source load module, light source handover module, wavelength handover module, automatically can regulate the optical attenuator module of gain, can connect successively by real-time online light splitting sampling module, optical branching device and built in light power meter can be comprised by real-time online light splitting sampling module, optical branching device output terminal one tunnel connects alignment light interface, and the other end that optical branching device exports connects built in light power meter; Under program, adjustment light source mode, wavelength, optical output power, make Output optical power reach preset parameter to control module; Control module reads the numerical value of built in light power meter, and this numerical value is passed to outside light power meter to be calibrated.By introducing optical branching device and built in light power meter, and each functional module is integrated and connected, and realizes luminous power instrument automatic calibration.
Description
Technical field
The invention belongs to light calibrating indicating instrument field, be specifically related to a kind of Automatic calibration device for optical power meter and method.
Background technology
Light power meter is requisite basic test instrument in optical fiber communication test field.Light power meter calibration operation under prior art, by realizing calibrating with the comparison of etalon optical power meter.
As Fig. 1, first standard sources is connected to etalon optical power meter A by optical attenuator; In test wavelength, adjustment optical attenuator, uses fiber optical power and reaches calibration performance number (as-10dBm) and the test number recording now etalon optical power meter;
And then standard sources is connected to equipment B to be calibrated by optical attenuator;
Computing machine connects equipment to be calibrated, the etalon optical power meter reading value just now recorded is dealt into equipment to be calibrated, calibrates.
At different wave length and different capacity point, above-mentioned steps needs to repeat.
Can see there is following shortcoming from above introduction:
Manual operation, complex steps, efficiency are low.
Uncontrollable node is many, and influence factor is many.
This calibrating mode is premised on the luminous power of light source output is constant, and during calibration, the etalon optical power meter reading of above reading at a moment is that benchmark is calibrated; Therefore in fact the reference light source under prior art is not the same light source of real meaning.
Above factor affects fiber optical power change, is unfavorable for that calibration accurately.
Summary of the invention
The present invention is directed to shortcoming and the problem of existing light power meter calibration existence, provide a kind of Automatic calibration device for optical power meter and method, eliminate that the uncontrollable node of prior art is many, external interference factor is many, the inaccurate shortcoming of precision, by can real-time online light splitting sampling mode, realize same light source real time calibration truly, greatly improve degree of accuracy, decrease manual intervention, effectively boost productivity, reduce costs, meet the Production requirement day by day increased, there is revolutionary meaning.
The technical scheme that the present invention realizes its target is:
Automatic calibration device for optical power meter, calibrate for treating alignment light power meter instrument, it is characterized in that: comprise automatic calibration unit and centralized control unit, automatic calibration unit is connected with centralized control unit.
Described automatic calibration unit comprises multi-wavelength stable light source, wavelength switch control module, optical attenuator, can real-time online light splitting sampling module;
Described multi-wavelength stable light source, wavelength switches control module, optical attenuator, can connect successively by real-time online light splitting sampling module;
Centralized control unit can be connected by real-time online light splitting sampling module;
Multi-wavelength stable light source, wavelength switch control module, optical attenuator is connected with centralized control unit respectively;
The built-in communication part of described centralized control unit, or connect external communication assembly.
Further, describedly optical branching device, built in light power meter can be comprised by real-time online light splitting sampling module;
One tunnel of described optical branching device exports to connect and exports optical alignment interface; Optical alignment interface connects outside instrument to be calibrated; Another road of optical branching device exports and connects built in light power meter; Built in light power meter connect centralized control unit, can real-time online measuring export luminous power.
Better, described optical attenuator is the optical attenuator that automatically can regulate gain;
Further, described multi-wavelength stable light source comprise single mode light source export or multimode light sources export or both have concurrently; Corresponding respectively with it, described automatic calibration unit is the single mode automatic calibration unit being suitable for the output of single mode light source; Or for being suitable for the multimode automatic calibration unit that multimode light sources exports; Or both have concurrently.
The structure composition of automatic calibration unit is applicable to single mode automatic calibration unit, multimode automatic calibration unit; That is, its basic structure is consistent, and according to the difference of single mode light source, multimode light sources, relevant interface etc. do accommodation.
In order to improve the performance dirigibility of device further, described wavelength switches control module and also sets up external light source access port.
The multi-wavelength stable light source that described automatic calibration unit comprises, wavelength switch control module, optical attenuator, can real-time online light splitting sampling module, be integrated tight assembly; Or be respective independently parts; Be connected with centralized control unit assembly during use.
Centralized control unit can be the microcontroller component or stand-alone computer with control treatment function, also can with multi-wavelength stable light source, wavelength switch control module, optical attenuator, can the tight Components integration one of real-time online light splitting sampling module composition.
Each assembly of device, unit package are integrated tight assembly, and because of the simple of structure, reliability is improved, space and cost also significantly reduce.
The module, the assembly that realize above-mentioned each function also can be made up of autonomous device respectively, during use according to
Automatic calibration device for optical power meter, also comprises Input/Output Device interface, and input equipment interface connects input equipment, such as keyboard; Output device interface connects output device, such as display screen; Be typically the LCD touch screen of integrated input, output function.
If no special instructions, the optical device described in literary composition is all applicable to single mode, multimode two kinds of modes.
The present invention provides a kind of method of light power meter automatic calibration simultaneously, calibrate for treating alignment light power meter, comprise: PLC technology take computing machine as the control module of core, with there is light source input, light source switches, wavelength switches, automatically can regulate the optical attenuator of gain, can the automatic calibration unit of real-time online light splitting sampled functions be connected, automatic calibration unit built in light power meter, automatic calibration unit, under the programmed control of control module, is calibrated the outside light power meter to be calibrated connected.
Described automatic calibration unit by light source load module, light source handover module, wavelength handover module, automatically can regulate the optical attenuator module of gain, can connect successively by real-time online light splitting sampling module, light source handover module, wavelength handover module, optical power attenuation module and PLC technology be that the control module of core is connected and communication respectively with computing machine, operate under the control module taking computing machine as core controls; Optical branching device and built in light power meter can be comprised by real-time online light splitting sampling module, optical branching device input end is connected with the output terminal of optical power attenuation module, optical branching device output terminal one tunnel connects alignment light interface, the other end that optical branching device exports connects built in light power meter, the control module of core that what built in light power meter connected PLC technology with computing machine is; In calibration process, under program, adjustment light source mode, wavelength, optical output power gain reduction ratio, make Output optical power reach requirement to control module; Control module can read the numerical value of built in light power meter, and this numerical value is passed to outside light power meter to be calibrated.
Described method will realize each functional module combination of calibration, and be integrated and connected; And application can real-time online light splitting sampling module in a calibration process, realizes calibrating same light source real-time sampling; With PLC technology with computing machine be core control module control under, multiple light courcess, multi-wavelength, many power points automatic calibration; Once connect and just can calibrate in batches, need not change.
Its automatic calibration step is as follows:
Before batch calibration starts, first external perimysium reference light power meter is connected alignment light interface, and with PLC technology take computing machine as the control module communication of core, with external perimysium reference luminous power for mete-wand, built-in light power meter is calibrated;
Then, outside light power meter to be calibrated connects alignment light interface, and with PLC technology take computing machine as the control module communication of core, with built-in light power meter for mete-wand, outside light power meter to be calibrated is calibrated;
Multi-wavelength stable light source provides the light of the required wavelength of calibration; Under control module programmed control, wavelength switches control module and is used for switching the light of respective wavelength to corresponding port; Under control module programmed control, optical attenuator regulates gain, utilizes the optical attenuator that automatically can regulate gain, and adjustment Output optical power, reaches required calibration point; Thus realize under Different Light, under different wave length, different capacity point regulates automatically, automatic calibration.
Because control module has communication function, therefore also can realize under outside or remote computer program control or under interactive instruction controls, calibrating installation operates.
Can real-time online light splitting sampling module owing to introducing, realize same light source real time calibration, fiber light power stabilising, once connect in calibration process and just can calibrate in batches, need not change; Multiple light courcess, multi-wavelength, many power points automatic calibration.
The present invention, by said structure and method, has very outstanding outstanding effect, and realize same light source real time calibration truly, fiber light power stabilising, has thoroughly broken away from many drawbacks of manual calibration, achieved the automatic calibration of light power meter; Greatly improve calibration accuracy.
Accompanying drawing explanation
Fig. 1 is the light power meter calibration schematic diagram under prior art.
Fig. 2 is that the present invention realizes theory diagram.
Fig. 3 is the signal of an embodiment of the present invention implementation.
Fig. 4 is the signal of another embodiment of the present invention implementation.
Fig. 5 is process of self-test flow process of the present invention signal.
Fig. 6 is the process of self-test of wavelength of the present invention at 1310nm.
Fig. 7 is that wavelength of the present invention is illustrated in 1310nm automatic calibration flow process.
Fig. 8 is that wavelength of the present invention is illustrated in 1310nm automatic gauging flow process.
Accompanying drawing described herein, for providing the further understanding to invention, forms a part of the present invention, and illustrative examples of the present invention and explanation, for explaining the present invention, do not form inappropriate limitation of the present invention.
Embodiment
Below by way of particular specific embodiment, implementation of the present invention is described, the content that those skilled in the art can be disclosed by this instructions understands other advantage of the present invention and beneficial effect easily.The present invention is also realized by other different specific embodiments and is applied.Every details of the present invention also based on different viewpoints and application, can carry out various modification and change under prerequisite of the present invention.
Be below preferred embodiment of the present invention, the protection domain of not this patent restriction.Within all spirit at this patent and principle, the amendment done, equivalently to replace, improve, be all included within protection scope of the present invention.
Below in conjunction with accompanying drawing, further the embodiment of the present invention be described and specifically describe, to understand meaning of the present invention more clearly.
In conjunction with the preferred embodiments, specific embodiment of the invention scheme is described in detail.
Embodiment 1: for single mode light source, as Fig. 2.
Automatic calibration device for optical power meter, calibrate for treating alignment light power meter instrument, it is characterized in that: comprise automatic calibration unit and centralized control unit, automatic calibration unit is connected with centralized control unit.
Described automatic calibration unit comprises multi-wavelength stable light source, wavelength switch control module, optical attenuator, can real-time online light splitting sampling module;
Described multi-wavelength stable light source, wavelength switch control module, optical attenuator, can real-time online light splitting sampling module successively light connect;
Centralized control unit can be connected by real-time online light splitting sampling module;
Multi-wavelength stable light source, wavelength switch control module, optical attenuator is connected with centralized control unit respectively; Therefore, it is possible under the control of centralized control unit, carry out multi wave length illuminating source conversion, wavelength switches and light intensity decays regulates; Optical attenuator is the optical attenuator that automatically can regulate gain; Under the steering order of centralized control unit, automatically carry out gain transformations, and then the power level of regulation output light signal.
Described centralized control unit is programmable computing machine, built-in communication part, or connects external communication assembly, with instrument to be calibrated, external smart compunication.
Centralized control unit, by communication part, is connected with external smart computing machine, and carries out exchanges data and communicate; Communication form is wired or wireless, serial ports or network interface, and then realizes long-range, controlled in wireless.
Described can real-time online light splitting sampling module, realize carrying out Real-Time Monitoring to the Output optical power of same light source, comprise optical branching device and built in light power meter;
One tunnel of described optical branching device exports to connect and exports optical alignment interface; Optical alignment interface connects outside instrument to be calibrated; Another road of optical branching device exports and connects built in light power meter; Built in light power meter connect centralized control unit, can real-time online measuring export luminous power.The configuration achieves same light source real time calibration truly, greatly improve degree of accuracy;
Optical attenuator is the optical attenuator that automatically can regulate gain; Under the steering order of centralized control unit, carry out gain transformations, and then the intensity of regulation output light signal.
In the present embodiment, Automatic calibration device for optical power meter is applied to single mode light source, for realizing topology example under the single mode light source way of output.
In practical application, before batch calibration, first count mete-wand with external etalon optical power, the built in light power meter of device is calibrated; Then access equipment to be calibrated, now mete-wand is built in light power meter.
Centralized control unit is programmable computing machine, and has communication function, realizes the information interchange between modules, and sends control signal in time, adjust.
Therefore, whole device under program, automatically realize light source conversion, wavelength convert, attenuation transform, the measurement numerical value of built in light power meter passed to instrumentation to be calibrated, instrumentation to be calibrated with the measurement numerical value of built-in light power meter for standard is calibrated.
Embodiment 2: in the present embodiment, the structure composition of Automatic calibration device for optical power meter is substantially the same manner as Example 1; Difference is, automatic calibration unit is the multimode automatic calibration unit being applicable to multimode light sources output.Multimode automatic calibration unit is substantially identical with the structure of single mode automatic calibration unit, and just relevant interface etc. are applicable to multimode light sources output.
Embodiment 3: see Fig. 3.In the present embodiment, Automatic calibration device for optical power meter, except have be applicable to single mode light source export single mode automatic calibration unit except, also have be applicable to multimode light sources export multimode automatic calibration unit.Multimode automatic calibration unit is substantially identical with the structure of single mode automatic calibration unit, and be just applicable to multimode light sources and export, corresponding component makes accommodation.
In order to improve the extended capability of equipment, in the various embodiments described above, wavelength switches control module, also sets up external light source access port, can input external light source, enhance light source input capability; As Fig. 4.
In above embodiment, in order to realize better operation ease, the present invention is also provided with input-output device interface, connects input equipment, output device.Input equipment, output device be integrated be arranged in Automatic calibration device for optical power meter or input equipment, output device external.
Typically, input equipment is keyboard, and output device is display screen.Under currently available technology, preferred version is the LCD touch display screen with touch-input function.
For realizing technical goal of the present invention, each ingredient of Automatic calibration device for optical power meter, each component units---multi-wavelength stable light source, wavelength switches control module, optical attenuator, optical branching device, can real-time online light splitting sampling module, and centralized control unit, one can be encapsulated in, become the integrated instrument of a tight structure;
Also can have a style of one's own respectively, separately as autonomous device, during use, each autonomous device connects use according to aforesaid way, and assembly is flexible.
Multi-wavelength stable light source comprises the output of single mode light source, multimode light sources exports;
Described multi-wavelength stable light source, optical attenuator, wavelength switch control unit are all applicable to single mode, multimode.Optical interface does adaptability according to light source situation and regulates.
Device used in literary composition also according to custom, can be called instrument, platform, system.The power meter of built in light described in literary composition, is for external perimysium reference light power meter, does not make particular determination to its position, as long as realize its function.
Operation instruction:
Built in light power meter, first using external perimysium reference light power meter as standard source, carries out self-inspection, self calibration, then as calibration foundation and the judge of whole calibrating installation;
Multi-wavelength stable light source provides the light of the required wavelength of calibration;
Automatically can regulate the optical attenuator adjustment output power of gain, reach required calibration point;
Wavelength switches control module and is used for switching the light of respective wavelength to corresponding port;
Centralized control unit is the control center of whole device, the functions such as implementation procedure control, Communication Control.
Centralized control unit, in conjunction with automatic calibration unit, by automatic control, achieves multi-wavelength automatic calibration and inspection, the precision of comprehensive coverage calibration and reliability.
During use, instrument to be calibrated only need use an optical fiber cable to be connected to alignment light interface, and and centralized control unit establish a communications link, just can complete calibration and the inspection of all wavelengths under respective sources pattern (single mode, multimode).Achieve the luminous power Real-Time Monitoring of light power meter calibration process, realize a multiple calibration point automatic calibration of instrument gamut.
Before batch calibration starts, first external perimysium reference light power meter is connected alignment light interface, and with PLC technology take computing machine as the centralized control unit communication of core, with external perimysium reference light power meter for mete-wand, built-in luminous power is calibrated;
System self-test, also claims self calibration, is the automatic preliminary work before equipment use automatic calibration.
Fig. 5 illustrates system in automatic mode, for the self-inspection flow process of single mode four wavelength (as 1310nm, 1490nm, 1550nm, 1625nm);
Fig. 6, for 1310nm process of self-test, illustrates the process of self-test of each wavelength;
Then, outside light power meter to be calibrated connects alignment light interface, and with PLC technology take computing machine as the centralized control unit communication of core, with built-in light power meter for mete-wand, luminous power is internally put to outside and calibrates.
After System self-test completes, automatic calibration light power meter can be carried out, by button or instruction triggers automatic calibration process.Fig. 7 illustrates automatic calibration flow process for single mode 1310nm;
After automatic calibration completes, system also can carry out automatic gauging, connected mode as above, by button or instruction triggers automatic gauging process.Fig. 8 illustrates workflow for single mode 1310nm;
Can illustrate from above-mentioned example, the present invention, by the above technical scheme, achieves automatic calibration, reaches object of the present invention; Effective reduction, reduce or eliminate in calibration process the disturbing factor affecting calibration accuracy, improve the reliability of calibration, consistance; The production efficiency of significant increase product and quality control ability, technical scheme is applicable to bulk article automatic calibration, automatic gauging, and the product calibrated, precision is high, and uniform quality is good, meet the quality requirements of high-precision calibration.
Obviously, the present invention does not limit for alignment light power meter, under the guidance of inventive concept, can also be used for measurement and the related application of other parameters.
Although the present invention is described with reference to preferred embodiment and accompanying drawing, but above-mentioned explanation should be considered as illustrative and non-limiting, the change that person's spirit according to the present invention of being familiar with technique is made and revise the protection domain that should belong to this patent.
Claims (2)
1. Automatic calibration method for optical power meter, carrying out automatic calibration for treating alignment light power meter, it is characterized in that: PLC technology be that the centralized control unit of core is connected with automatic calibration unit with computing machine; Centralized control unit and automatic calibration unit composition light power meter automated calibration system; Automatic calibration unit built in light power meter, automatic calibration unit, under the programmed control of centralized control unit, is calibrated the light power meter to be calibrated connected;
Wherein automatic calibration step is as follows: (one) is before batch calibration starts, first external perimysium reference light power meter is connected alignment light interface, and with PLC technology take computing machine as the centralized control unit communication of core, with external perimysium reference light power meter for mete-wand, built-in light power meter is calibrated; (2) then, light power meter to be calibrated connects alignment light interface, and with PLC technology take computing machine as the centralized control unit communication of core, with built-in light power meter for mete-wand, treat alignment light power meter and carry out automatic calibration;
Wherein said automatic calibration unit by light source load module, light source handover module, wavelength handover module, automatically can regulate the optical attenuator module of gain, can connect successively by real-time online light splitting sampling module, light source handover module, wavelength handover module, what automatically can regulate the optical attenuator module of gain and PLC technology is that the centralized control unit of core is connected and communication respectively with computing machine, operates under the centralized control unit taking computing machine as core controls; Wherein saidly can comprise optical branching device and built in light power meter by real-time online light splitting sampling module; Automatically the optical attenuator model calling optical branching device of gain can be regulated, optical branching device input end is connected with the output terminal of the optical power attenuation device module that automatically can regulate gain, optical branching device output terminal one tunnel connects alignment light interface, the other end that optical branching device exports connects built in light power meter, what built in light power meter connected PLC technology take computing machine as the centralized control unit of core, can the luminous power that exports of real-time online measuring; In calibration process, under program, adjustment light source mode and wavelength and optical power attenuation ratio, make the luminous power parameter of output reach requirement to centralized control unit; Centralized control unit reads the numerical value of built in light power meter, and this numerical value is passed to light power meter to be calibrated.
2. according to Automatic calibration method for optical power meter described in claim 1, it is characterized in that: described method will realize each functional module combination of light power meter calibration, and be integrated and connected; And application can real-time online light splitting sampling module in a calibration process, realizes calibrating same light source real-time sampling; Under the centralized control unit control taking computing machine as core of PLC technology, multiple light courcess, multi-wavelength and many power points automatic calibration.
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| WO2017181916A1 (en) * | 2016-04-20 | 2017-10-26 | 山东信通电子股份有限公司 | Method for automatically calibrating bidirectional light receiving and emitting power of pon network device |
| CN105959059B (en) * | 2016-04-20 | 2019-03-15 | 山东信通电子股份有限公司 | The online accurate measurement method of PON network optical link loss |
| CN105933058B (en) * | 2016-04-20 | 2019-01-25 | 山东信通电子股份有限公司 | PON network equipment bidirectional transmit-receive optical power automatic calibrating method |
| CN105792033B (en) * | 2016-04-20 | 2019-07-12 | 山东信通电子股份有限公司 | The accuracy controlling method of PON network business optical signal power |
| CN113113835B (en) * | 2021-04-08 | 2023-06-23 | 安徽养和医疗器械设备有限公司 | Automatic calibration system for laser instrument curve |
| JP7432636B2 (en) | 2022-03-11 | 2024-02-16 | 日機装株式会社 | How to calibrate a light measurement device |
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| CN1398060A (en) * | 2002-08-06 | 2003-02-19 | 宜捷威科技股份有限公司 | Test system and method for fast light transmission module |
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