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词条 Vibrations per hour
释义

  1. References

{{Use dmy dates|date=September 2018}}Vibrations Per Hour or VPH is a mechanical timepiece specification. It is used to express the frequency of a watch movement.[1][2] VPH describes the number of times that a vibrating timekeeping component completes a vibration cycle in 1 hour.[3] More vibrations per hour yields higher timekeeping resolution, and usually indicates a higher precision mechanical movement.[4]

References

1. ^{{cite book| last = Fritts| first = C.E.| title = The Watch Adjuster's Manual| publisher = The Keystone| year = 1904| url = https://books.google.com/books?id=nZ27BvJwol4C| access-date = 13 September 2018| page = 81}}
2. ^{{Cite news| url = https://www.watchtime.com/reference-center/glossary/vibration-vph/| title = Vibration, VPH| work = WatchTime – USA's No.1 Watch Magazine| access-date = 8 July 2018}}
3. ^{{Cite news| url = https://www.forbes.com/sites/elizabethdoerr/2013/03/02/the-slowest-watch-in-the-world/| title = The Slowest Watch in the World| last = Doerr| first = Elizabeth| work = Forbes| access-date = 8 July 2018}}
4. ^{{cite web| title = Vibration, VPH| url = http://www.watchtime.com/reference-center/glossary/vibration-vph/| accessdate = 31 August 2013}}
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2 : Clocks|Units of temporal rate
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