Hanyar haɗin fiber mara matuƙi ta gaza a cikin jirgin, kuma tambaya ta farko ita ce kusan koyaushe game da ƙimar fiber. Da gaske ne G.657.A2? Shin mai kaya ya aika wani abu mai rahusa?
Wannan tambayar ba kasafai take kaiwa ko'ina ba, saboda lanƙwasa sa yana sarrafa yadda hasken ke tsira daga lanƙwasawa. Bai ce komai ba game da ko gilashin ya tsira daga cire shi da sauri. Watsewar biyan kuɗi lamari ne na inji, da ƙayyadaddun bayanai waɗanda ke annabta shi yawanci ana ɓacewa daga tattaunawar gaba ɗaya.
Wannan jagorar ta ƙunshi inda ainihin fiber ɗin ya ɓace, yadda ake karanta lambar ƙarfin ƙarfi ba tare da an ruɗe ta ba, dalilin da ya sa reel gina jiki al'amurran da yawa kamar fiber, da abin da za a rubuta a cikin ƙayyadaddun bayanai don a iya yanke hukunci na gaba akan wani abu na kankare.
Amsa da sauri: Lambobin Lambobi uku waɗanda ke yanke shawarar ko Fiber ɗin ku ya tsira
| Lamba | Abin da yake gaya muku | Mahimman ƙima don FPV-grade mara fiber |
|---|---|---|
| Tabbataccen matakin gwaji | Matsakaicin nunin kowane mita ya wuce yayin kera | ~ 100 kpsi (≈ 8.5-9.2 N akan 125 µm rufewa) |
| Ƙarfin ƙarfi | Nauyin da fiber a zahiri karya | ~50 N; 55-60 N don ingantattun sigogin |
| Payout tashin hankali | Load ɗin na'urar yana ɗauka yayin kwancewa cikin saurin tashi | Ba kowa ne ya buga shi ba - dole ne ku gwada shi |
Lamba na uku shine wanda ke kawo karshen tashin jirage, kuma shi ne wanda babu bayanan da ya kunsa. Ya zo daga reel yi, Hanyar iska da kuma yadda sauri drone ya hanzarta, ba daga ƙayyadaddun fiber ba.
Idan abu daya ka karanta anan: zaren da ke da kyakkyawan ƙarfi mai ƙarfi a kan ɗigon rauni mai rauni har yanzu zai karye. Reel ba marufi bane.
Inda Drone Fiber Haƙiƙa Ya Fasa
Rashin gazawar biyan kuɗi ya faɗi cikin hanyoyi huɗu. Suna kiran gyara daban-daban, kuma ɗaukar su a matsayin matsala ɗaya shine ya sa irin wannan gazawar ta ci gaba da maimaitawa.
Hutu a tsaye
Ana jan fiber ɗin fiye da iyakar ƙarfinsa a cikin wani abu guda ɗaya - wani abu a kan cikas, canjin shugabanci ba zato ba tsammani, kama jirgin sama. Load da ƙwanƙwasa ƙofa ta wuce iyakar hutu kuma hanyar haɗin ta tafi nan take.
Wannan shi ne tsarin da mutane ke kwatanta, kuma shi ne mafi karanci na hudu.
Rage biyan kuɗi mai ƙarfi
Tashin hankali yana tasowa yayin da fiber ke kwance. Reel wanda ke fitowa ba daidai ba, Layer da ke kama wanda ke ƙarƙashinsa, hanzari da sauri fiye da fakitin zai iya ciyarwa - kowane yana motsa tashin hankali zuwa sama, kuma gilashin yana kasawa a duk wani nauyin da ya kai, wanda zai iya zama ƙasa da ƙarfin da aka ƙididdige shi idan wani lahani ya faru ya zauna a wannan lokacin.
Wannan shine babban yanayin rashin nasara a cikin jirgin, kuma ana sarrafa shi da reel fiye da ta fiber.
Abrasion da gogayya lalacewa
Fiber yana shafa a gefen reel, fitowar gidaje, ko kanta. Rufe yana sawa, Gilashin saman yana ɗaukar lalacewar ƙananan ƙwayoyin cuta, kuma ƙarfi yana raguwa a gida. Hutu na iya faruwa bayan mintuna kaɗan a wani wuri wanda ba shi da ban mamaki.
Lalacewar juzu'i na tarawa ne kuma ba a iya gani, wanda ya sa ya zama hanya mafi wuyar ganewa bayan gaskiyar.
Tangling da kai
Fiber madaukai baya kan kanta, kama jirgin sama, or forms a knot as it comes off the pack. A knot in optical fiber concentrates stress at a radius far below anything the grade allows, and it breaks there.
Why “it broke” is almost never a grade problem
Three of these four mechanisms are decided by the reel and by flight profile. The fourth — static break — depends on tensile strength, and tensile strength is not what thebend-insensitive grade describes. A1 and A2 are screened to the same mechanical level and differ in bending optics.
So when a supplier confirms the fiber really is A2 and the breakage continues, that is the expected outcome, not a contradiction. For background on how the tethered architecture works and what it costs you, see our guide to thefiber optic FPV drone.
How to Read a Tensile Strength Number
Here is the practical problem. Two suppliers quote tensile strength. One says 50 N, another says 500 N. The second looks ten times stronger.
Very often it is not stronger at all — it is measuring something else. A tensile figure is meaningless until you know three things about it.
Question 1: What was tested?
Fiber, tight-buffered fiber and cabled fiber are three different products with three different strengths.
| What is being tested | What carries the load |
|---|---|
| Fiber (245 µm or 200/242 µm coated glass) | The glass itself |
| Tight-buffered fiber | Glass plus buffer layer |
| Cabled fiber | Aramid yarn, FRP or steel strength members — the glass carries almost none of it |
A cabled construction can be rated in the hundreds of newtons because aramid yarn carries the load. That number is real for the cable, and irrelevant to bare fiber on a drone reel.
A quick check: idan siffa mai tauri ta bayyana tare da kalmomi kamar aramid, memba karfi, ko kuma karfafa, yana bayanin kebul. Bare fiber ba shi da ɗayan waɗannan abubuwan. Lokacin da shafin fiber maras tushe ya faɗi wani ƙarfi wanda zai iya fitowa daga ingantaccen gini kawai, lambar da samfurin ba su dace ba.
Question 2: Yaya aka gwada shi?
Gwajin tabbatarwa da ƙarfin juriya ma'auni ne daban-daban, kuma tazarar da ke tsakaninsu tana da girma har ta kai ga kamanta kuskure alhalin ba haka ba ne.
- Gwajin hujja - kowane mita na fiber yana fuskantar ƙayyadaddun damuwa yayin kera. Ana cire duk abin da ya gaza. Wannan bakin kofa ne, ba wani ƙarfi rating.
- Ƙarfin ƙarfi - nauyin da fiber ya karye, yawanci ana ba da rahoto azaman rarrabawar Weibull saboda ƙarfin gilashin ƙididdiga ne maimakon ƙima ɗaya.
The next section covers why they differ by roughly six times.
Question 3: What unit?
Fiber strength appears as newtons, GPa or kpsi depending on the datasheet, which makes specs look incomparable when they are not. All three convert freely, because stress is force divided by cross-sectional area.
For standard 125 µm rufewa:
A=pr2=p×(62.5×10-6)2= 1.227×10-8 m2
Karfi(N)= Damuwa(Pa)×A1 GPA=145 kpsi
Wanda ke bayarwa:
| Damuwa | Tilastawa 125 µm rufewa | Daidai |
|---|---|---|
| 0.69 GPA | 8.5 N | 100 kpsi |
| 3.20 GPA | 39.3 N | 464 kpsi |
| 4.00 GPA | 49.1 N | 580 kpsi |
Kuma a baya:
| Karfi | Damuwa | Daidai |
|---|---|---|
| 9.0 N | 0.73 GPA | 106 kpsi |
| 50 N | 4.07 GPA | 591 kpsi |
| 60 N | 4.89 GPA | 709 kpsi |
Ci gaba da kasancewa na farko kuma zaka iya canza kowane ƙarfin fiber da kanka.
Misali na aiki: karanta ainihin bayanan
Ɗauki lissafin bayanan fiber maras tusheProof Test ≥ 9.0 N / ≥ 100 kpsi kuma, wani wuri a kan wannan shafi, adadi kanun labarai na newtons dari da yawa.
Guda tambayoyin guda uku:
- What was tested? Layin gwajin hujja ba shi da fiber. Wani adadi da yawa-ɗari-newton akan 125 Gilashin µm yana canzawa zuwa dubun GPa - sama da ƙarfin ka'idar silica. Ba zai iya kwatanta zaren danda ba, don haka yana kwatanta ginin da aka ƙarfafa.
- Yaya aka gwada shi? 9.0 N shine madaidaicin nuni. Adadin kanun labarai, komai nasa, nauyi karya ne. Daban-daban ma'auni.
- Wace raka'a? Duk a cikin newtons, don haka raka'a ba saɓani ba ne.
Figures biyu a shafi ɗaya, kwatanta samfurori daban-daban guda biyu. Ba lallai ba ne ƙarya - amma ba su da kwatankwacinsu, kuma ɗaya daga cikinsu shine fiber ɗin da ke kan reel ɗin ku.
Yi haka kafin a gwada ƙididdiga kuma kwatancen ya zama mai yiwuwa. Tsallake shi kuma za ku zaɓi kan lambar da ke bayyana kebul ɗin da ba ku saya ba.
Gwajin Tabbatar da Ƙarfin Ƙarfin Ƙarfin Ƙarfin Ƙarfin Ƙarfin Ƙarfin Ƙarfin Ƙarfin Ƙarfin Ƙarfafawa
Me gwajin hujja ke yi
Gwajin tabbatarwa yana jan duk tsawon fiber zuwa ma'anar damuwa yayin ƙira. Manufarsa ita ce kawarwa, ba cancanta ba: any point weak enough to fail at that stress breaks in the factory rather than in your reel.
A 100 kpsi proof test therefore guarantees a floor. Every metre survived 0.69 GPA, roughly 8.5 N. It does not mean the fiber breaks just above that.
Why the two numbers differ by roughly six times
Actual break strength sits well above the screening level. Our A2 fiber specifies ≥ 4.00 GPa at 50 % Weibull probability — about49 N — with typical values around50 N, and enhanced versions measured at55–60 N.
So the same fiber legitimately carries a 100 kpsi proof test rating and a ~50 N tensile strength. The ratio is about5.9×, and it is designed in:
| Daraja | Matsayi | |
|---|---|---|
| Gwajin hujja | ~8.5 N (100 kpsi) | Screening floor — every metre passed |
| Ƙarfin ƙarfi | ~50 N (4.07 GPA) | Typical break load |
| Enhanced tensile | 55–60 N | Measured on enhanced versions |
Karanta lamba ta farko a matsayin na biyu yana sa fiber ya yi rauni sau shida fiye da ita. Karatun na biyu a matsayin na farko yana sanya ƙofofin nunawa yayi kama da garantin aiki. Duk kurakuran biyu suna fitowa akai-akai a tattaunawar saye.
Abin da wannan ke nufi ga ƙayyadaddun ku: tambaya duka biyun. Gwajin shaida yana gaya muku ƙasan masana'anta; Ƙarfin ɗaure yana gaya muku gefen aiki.
Zane na Reel: Me yasa Iskar Ciki ke Mahimmanci
Ƙayyadaddun fiber yana saita iyaka na sama akan abin da mahaɗin zai iya tsira. Reel yana yanke shawarar nawa na wannan gefe da kuke samu.
Ciki vs iska na waje
Iskar waje yana barin fiber a waje na jikin reel, fallasa zuwa gidaje, filin jirgin sama da duk wani abu da jirgi mara matuki ya goge. Kowane juzu'i da aka fallasa shine maƙasudin abrasion.
Ciki da iska keeps the fiber inside the housing during release. The pack is protected from external contact, and the fiber leaves through a controlled exit path rather than peeling off an open surface.
The mechanism is straightforward: fewer external contact points, less friction, fewer places for the fiber to catch during dynamic release. This matters most on the failure mode that causes the most flights to end early — dynamic payout break, where tension spikes come from irregular release rather than from any single obstacle.
Reel material and weight
Reel mass is carried for the entire flight, so it competes directly with battery and payload.
3D-printed ABS housings suit this application for reasons beyond weight: geometry can be matched to a specific airframe, and revisions do not require new tooling. Wannan yana sa su dace da ƙima da ƙayyadaddun ginin dandamali. Yin gyare-gyaren allura ya zama mafi arziƙi a mafi girma girma, a farashin kayan aiki lokacin jagorar da ƙirar ƙira.
Ma'anar aikin injiniya shine cewa reel geometry - diamita na ganga, flange tazarar, hanyar fita - shine canjin ƙira wanda yakamata ya dace da dandamali, ba a karɓa a matsayin duk abin da mai sayarwa ya mallaka.
Rufewar guduro da gogayya
Wani zaɓi na guduro na zaɓi akan fakitin rauni yana rage juzu'i tsakanin jujjuyawar da ke kusa kuma yana ƙara ma'aunin kariya yayin sarrafawa.. Hakanan yana ƙara taro.
Ko yana da darajar nauyin ya dogara da dandamali. Bayanan haɓaka haɓaka mai ƙarfi, inda mai yuwuwar gogayya tsakanin Layer zai iya haifar da tashin hankali, yafi amfana. Ƙila a hankali ƙaddamar da aikin ba zai buƙaci shi ba. Ask your supplier which they recommend for your specific speed profile rather than treating it as a universal upgrade — and note that reducing the coating diameter, which changes both pack density and weight, interacts with this decision.
Payout Speed and the Tension Window
Every reel has a speed range within which the fiber releases cleanly. Below it, slack can accumulate and loop. Above it, tension rises until something fails.
That window is a property of the assembly — fiber, winding pattern, reel geometry and exit path together — which is why no fiber datasheet can tell you what it is. It has to be measured on the actual pack.
How to establish it:
- Run pay-out on the bench across your intended speed range, with the reel mounted as it will be on the aircraft.
- Kalli sa hannun gazawar biyu: shakku ko firgita (wani Layer kama) da rangwamen tarawa (sakewa da sauri fiye da ci gaban drone).
- Lura saurin da ko dai ya bayyana. Rufin aikin ku yana zaune a ƙarƙashinsa, tare da gefe.
- Maimaita bayan kowane canji zuwa reel geometry, Hanyar iska, shafi diamita ko fiber tsawon.
Haɗawa mai ƙarfi ita ce hanya ta gama gari don wuce taga a cikin jirgin. Bayanan martaba da ke aiki a tsayin tsayin daka na iya gazawa akan tashi mai sauri, kuma wannan bambancin ba zai bayyana akan kowace takardar ƙayyadaddun bayanai ba - kawai akan benci.
Hakanan dacewa damafi ƙarancin lanƙwasa radius fakitin ya dora: Ƙwararren rauni yana riƙe da zaren kusa da iyakar lanƙwasa don duka jirgin, ba kawai a lokacin sakin ba.
Tsawon, Nauyi da Lokacin tashi
Tsawon Reel ciniki ne ta hanyoyi uku, and optimising any one variable costs you the other two.
- More fiber means longer potential range and a heavier pack.
- A heavier pack means shorter flight time and reduced payload capacity.
- Shorter flight time means less of that theoretical range is reachable.
Beyond a certain length the added fiber cannot be used within the remaining endurance, so the practical answer is to size the reel to your mission radius plus margin, rather than to the maximum the platform can lift.
Coating diameter enters here as well. A reduced coating puts more length on the same reel at lower weight, at the cost of a thinner protective layer and different handling behaviour. Whether that trade is worth making depends on the platform and on how much handling the fiber sees before flight — the mechanical characteristics of reduced-coating fiber should be requested specifically rather than assumed from the standard datasheet.
What to Put in Your Specification
Most drone fiber specifications describe the fiber and stop, which leaves the parts that determine payout survival entirely to the supplier’s discretion. These lines make a batch verifiable.
Fiber
- Fiber grade and the ITU-T category it complies with
- Diamita mai rufi, stated explicitly (200/242 µm or 245 µm — do not leave it implied)
- Tabbataccen matakin gwaji, in kpsi or N, with the unit stated
- Ƙarfin ƙarfi, stated separately from proof test, with the measurement basis (na hali, or Weibull probability level)
- Attenuation at your operating wavelengths
Karfe
- Winding method: internal or external
- Reel material and total wound weight
- Fiber length per reel, with tolerance
- Reel geometry: barrel diameter and exit path configuration
- Rufewar guduro: required, ba na tilas ba ne, or not required
Verification
- Per-reel OTDR trace and attenuation record
- Pay-out test evidence at your intended speed range
- Batch traceability from reel to fiber lot
Two clauses worth adding explicitly:
Tensile strength shall be stated for bare fiber, not for a cabled or reinforced construction.
Proof test level and tensile strength shall be reported as separate values.
Those two lines make it impossible to answer your specification with a number that describes something you are not buying.
How to Verify Before Acceptance
On documentation. Request the per-reel OTDR trace and attenuation record. OTDR yana nuna attenuation tare da cikakken tsayi kuma yana bayyana raguwar maki cewa ma'aunin ƙarshen-zuwa-ƙarshen ba zai kama ba.. Bincika cewa alamar ta yi daidai da reel ɗin da kuka karɓa, ba ga samfurin batch.
A kan reel kanta. Duba iskar kafin hawa. Nemo ketare yadudduka, rashin daidaituwa tsakanin yadudduka, da kowane wuri inda fiber ke zaune a gefen kaifi. Iskar da ba ta dace ba za ta biya ba bisa ka'ida ba.
A kan benci. Gudanar da gwajin biyan kuɗi daga sashin da ya gabata kafin jirgin farko, ba bayan gazawar farko ba. Wannan ita ce kawai gwajin da ke aiwatar da ainihin hanyar da ke kawo ƙarshen tashin jirage, kuma yana kashe reel ɗaya na lokacin ku maimakon jirgin sama ɗaya.
Tsakanin batches. Ajiye bayanan OTDR. Lokacin da gazawa ta faru, Bambanci tsakanin reel wanda ya hadu da ƙayyadaddun bayanai da wanda ba a iya gani kawai idan kuna da bayanan farko don kwatanta su..
Fibconet yana ba da lanƙwasa-ƙarfi mara nauyi da raƙuman rauni don sadarwar filin farar hula da masana'antu - amsa gaggawa, masana'antu UAV dubawa, bincike da ceto, da tura cibiyar sadarwa ta wucin gadi. Matsayin tensile, shafi diamita, resin shafi, ƙirar reel da rahoton OTDR na kowane-reel an ƙayyade ta kowane dandamali; gani G657A2 FPV fiber drone akan 3D-bugu ABS reel don ƙayyadaddun kayan aiki, ko aiko mana da sigogin dandalin ku da kewayon saurin biyan kuɗi kuma ƙungiyar injiniyoyinmu za su sake duba su akan bayanan fiber da aka auna.
