1 / 16

III outage

III outage. Occur 42 days in 165 days Reboot: 6 Error: 3 Empty: 13 Manual: 3 Unknown: 5(5/7, 9, 10, 11) No log: 12 8 days filtered in 42 days Empty:2(12/29 30), manual:1(6/7), unknown:1(5/11), no log:4(12/10 14, 1/7, 3/14) 10,14,29,30 Dec., 7 Jan., 14 Mar., 11 May, 7 Jun. III 類挑出不能用.

herman-ayers
Download Presentation

III outage

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. III outage • Occur 42 days in 165 days • Reboot: 6 • Error: 3 • Empty: 13 • Manual: 3 • Unknown: 5(5/7, 9, 10, 11) • No log: 12 • 8 days filtered in 42 days • Empty:2(12/29 30), manual:1(6/7), unknown:1(5/11), no log:4(12/10 14, 1/7, 3/14) • 10,14,29,30 Dec., 7 Jan., 14 Mar., 11 May, 7 Jun.

  2. III類挑出不能用 • 12/14 • 12/29

  3. How to filter for III類 • 一階微分用斜率來判斷 • |mAB-mBC|< δ • |mBC-mCD|< δ • 二階微分 • |F’’ABC- F’’BCD| < δ D C B A C B D A

  4. 開始 III類斷電 斷電前後電壓是否符合控制器設定 抓出每天斷電資料 No 斷電前後斜率差是否<0.015 No Yes 斷電時間是否符合timer 設定 No Yes II類斷電 斷電時間是否跨越晚上(7:00pm~6:00am) Yes Yes No 前一天日照累積是否>4.53 I類斷電 No Yes 不能採用的資料discard 前二天日照累積是否<12.61 No interpolation interpolation Yes 不能採用的資料discard 可以採用的資料

  5. 0<有電壓值斜率差 <0.015 0.000315<III類斷電斜率差 <1.4365

  6. smooth最大斜率差0.015 =>只要斜率差>0.015,挑出來,不能用

  7. Related works • Design, modeling and capacity planning for micro-solar power sensor networks, IPSN08 • Cloudy computing: leverage weather forecasts in energy harvesting sensor systems, secon10 • Solarstore: enhancing data reliability in solar-powered storage-centric sensor network, mobisys09 • Steady and Fair rate allocation for rechargeable sensors in perpetual sensor networks, Sensys08 • Networking low-power energy harvesting devices: measurements and algorithm, infocom11

  8. Mobisys09 • 計算是否有多餘電量來讓系統備份data • If 目前電池電量>(平均消耗功率/平均充電功率)x電池容量, 就可以保持供電 • Evaluation data loss (無備份,always備份,電池滿才備份)

  9. Sensys 08 • 用太陽能收到多少來決定data collection rate • 讓node都不會因為傳太快而沒電 • Centralized/distributed algorithm

  10. Infocom11 • 室內光產生電源,實際測量8個環境 • Model 分三類:可預測,半預測,隨意型 • Ep(i) = a x E(i-1) +(1-a)Ep(i-1), 0<a<1 • 但誤差還是很大 • 所以在某些環境採用SECON10 天氣model,誤差比較小

  11. IPSN08 • Solar Model • Network & HW design • 19nodes for collect/receive 溫濕度 • Sizing and selection • 實際去量測每個component profile • 比較用不同電池壽命多久 • Evaluation for two test deployments • 市區佈建 VS 森林佈建

  12. Secon10 • 分析一整年的資料,搭配氣象局資料 • 日照輻射(W/m2)與充電功率(W)=>線性關係 • Solar power = 0.0444*radiation -2.65 • 每日充電能量(W) vs時間(hr)=>2次方程式 • Power = a*(Time+b)^2 + c

  13. Solarstore: enhancing data reliability in solar-powered storage-centric sensor network, mobisys09 • Networking low-power energy harvesting devices: measurements and algorithm, infocom11

  14. BSpower consumption in one hr

  15. BS 電壓與溫度相關性

  16. Outage III algorithm • if (abs(mAB-mBC)>Threshold) || (abs(mBC-mCD)>Threshold) filter out Threshold = 0.019 • else if(13V<斷電前電壓) &&(duration > 19600 ) filter out • else if(12V<斷電前電壓<12.5V) &&(duration > 10800 ) filter out • else if (斷電前電壓<12V) &&(duration > 3600) filterout

More Related