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  1. Path: sparky!uunet!comp.vuw.ac.nz!actrix!ping!ping
  2. From: ping@ping.actrix.gen.nz (Peter Ingham)
  3. Subject: Re: TV Cricket
  4. Newsgroups: nz.general
  5. References: <1993Jan21.132135.1@csc.canterbury.ac.nz>
  6. X-Newsreader: TIN [version 1.1 PL8]
  7. Message-ID: <ping.048k@ping.actrix.gen.nz>
  8. Date: 24 Jan 93 22:43:24 GMT
  9. Organization: Private UUCP Site
  10. Lines: 50
  11.  
  12. engf002@csc.canterbury.ac.nz wrote:
  13. > Someone said, re stump vision:
  14. > >>> >I understand that the "expensive and sensitive electronic
  15. > >>> >equipment" is in a box underground and that the stump just has a
  16. > >>> >mirror device in it.
  17.  
  18. > I thought they had this arrangement :
  19. >              +------+
  20. >              ||     |
  21. >              || UHF aerial
  22. >              ||     |
  23. >              ||     | <---- hollowed out stump
  24. >              |      |
  25. >              |----- |
  26. >              |    / ]                       }
  27. >   Mirror (prism)/   ] "Window"              }
  28. >              |/     ]                       }All heavily shock-resisted
  29. >              | ---- |  lenses and optics    }
  30. >              | ---- |                       }
  31. >              | ==== |  subminature CCD      }
  32. >              | |__| |    & high-speed shutter mechanism
  33. >              |  |_  |                       }
  34. >              | | _| |  UHF transmitter      }
  35. >              |  |   |
  36. >              |  |   |
  37. >              |  Wires down to 12v power supply (underground)
  38. >              |      |
  39. > Andrew Earl
  40. > -- Many pages make thick book. Except for pocket bibles which are printed
  41. >    on very thin paper. --
  42.  
  43. No Stump Cameras in NZ use UHF transmission.
  44. All video is carried out on coax.
  45.  
  46. Shutter is electronic.
  47.  
  48. 12V power supply is as you say held underground.
  49.  
  50. Shock resistance consists of cardboard / tape to stop it flopping about inside 
  51. the hollow stump.
  52.  
  53.  
  54.  
  55.  
  56. --
  57.  
  58. Cheers
  59.  
  60.     Peter S. Ingham              ping@ping.actrix.gen.nz
  61.     Lower Hutt,  New Zealand     3:771/220.5
  62.