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| -- 作者：whitecamel -- 發布時間：2010/7/22 19:39:23 -- [原創]當電力通信遇上高壓直流輸電【求解】 請問各位大師： 當電力通信遇上高壓直流輸電會出現什么情況呢？？ 也就是說能不能在直流輸電上加載傳輸信號？？？ |
| -- 作者：whitecamel -- 發布時間：2010/7/22 20:34:15 -- 到底有沒有人知道答案啊？？？ |
| -- 作者：新月彎刀 -- 發布時間：2010/7/27 8:34:54 -- 直接傳輸絕對不允許。 |
| -- 作者：飛翔123 -- 發布時間：2010/10/10 20:17:40 -- 樓上請詳解一下何謂 直接傳輸不允許？ 謝謝！以前還沒想過這個問題。 |
| -- 作者：山雨夜來漲 -- 發布時間：2010/12/26 23:34:01 -- and effect the visibility Coating is the critical step among marking construction, sealcoating equipment and please pay more stict attention to its operation procedures. Coating procedures and precautions: 1) Check pavement marking equipment and inspect the construction equipment carefully and assure that they are in good condition. Please do pre-marking, and check pavement striping machines the color, thickness, width, volume and glass beads spread volume. if necessary, adjust the parameters and asphalt striping machine. 2) Coating should be start after the primer drying thoroughly. Or, the solvent will penetrate the unhardened paint film, resulting in solvent bubbles, field striping machine and marking contamination. 3) To ensure the visibility of markings at night, please spread glass beads when coating construction. It is demonstrated that half of the diameter of field marking equipment glass beads embedded in coating that the reflect effect is the best. But we should know that the glass bead will be buried in the coating if line marking equipment the paint temperature is high, while the glass beads spreading speed is fast ,and the glass beads can not adhered to coating firmly and is easy to come off if the paint temperature is low, while line markers glass beads spreading speed is slow, for at that time the coating is almost solidified, which will affect the whole reflect effect. Glass beads should be spreaded uniformly, generally speaking, 0.3~0.5kg on square meter is proper. If line striping equipment the glass bead is too excessive, it will make the markings\' color bad and cause uneven visual effect, and is easy for dust to stick on it and effect the visibility. |
| -- 作者：山雨夜來漲 -- 發布時間：2010/12/27 17:50:19 -- and effect the visibility Coating is the critical step among marking construction, sealcoating equipment and please pay more stict attention to its operation procedures. Coating procedures and precautions: 1) Check pavement marking equipment and inspect the construction equipment carefully and assure that they are in good condition. Please do pre-marking, and check pavement striping machines the color, thickness, width, volume and glass beads spread volume. if necessary, adjust the parameters and asphalt striping machine. 2) Coating should be start after the primer drying thoroughly. Or, the solvent will penetrate the unhardened paint film, resulting in solvent bubbles, field striping machine and marking contamination. 3) To ensure the visibility of markings at night, please spread glass beads when coating construction. It is demonstrated that half of the diameter of field marking equipment glass beads embedded in coating that the reflect effect is the best. But we should know that the glass bead will be buried in the coating if line marking equipment the paint temperature is high, while the glass beads spreading speed is fast ,and the glass beads can not adhered to coating firmly and is easy to come off if the paint temperature is low, while line markers glass beads spreading speed is slow, for at that time the coating is almost solidified, which will affect the whole reflect effect. Glass beads should be spreaded uniformly, generally speaking, 0.3~0.5kg on square meter is proper. If line striping equipment the glass bead is too excessive, it will make the markings\' color bad and cause uneven visual effect, and is easy for dust to stick on it and effect the visibility. |
| -- 作者：常樂 -- 發布時間：2011/1/9 21:48:32 -- 直流電壓沒有頻率如何實現調制呢？ |