Method and Device for Reproducing at a Different Rate that From the Recording

• US 20080232766A1
• Filed: 08/30/2006
• Published: 09/25/2008
• Est. Priority Date: 08/31/2005
• Status: Active Grant

• Current Assignee: Tesin NV
• Original Assignee: Tesin NV
• Inventors: Van Quickelberge, Luc
• Granted Patent: US 8,154,592 B2
• Time in Patent Office: Days
• US Class Current: 386/68
• CPC Class Codes: H04N 5/772 the recording apparatus and the television camera being placed in the same enclosure
• CPC Class Codes: H04N 5/783 Adaptations for reproducing at a rate different from the recording rate

Abstract

The invention relates to a device for inspecting fast repetitive events of defined duration, comprising image recording means for recording successive images of the repetitive event, and image reproduction means for providing a synchronised slow motion representation of said successive images of the repetitive event during the total duration of the repetitive event or a multiple thereof, whereas said image recording means comprise high frame rate image recording means for digitally recording a limited burst of successive images of a fraction of one event, and the device comprises software means to provide synchronised image recording of said fraction of one event and slow motion representation of said limited burst of successive images during the total duration of said one event or multiple thereof, and

to an inspection method for such repetitive events involving high frame rate image recording of a limited burst of successive images of a fraction of one event, and synchronised slow motion representation of said limited burst of successive images during the total duration of said one event or multiple thereof.

Claims

1. Device for inspecting fast repetitive events of defined duration, comprising image recording means for recording successive images of the repetitive event, and image reproduction means for providing a synchronised slow motion representation of said successive images of the repetitive event during the total duration of the repetitive event or a multiple thereof, characterised in that said image recording means comprise high frame rate image recording means for digitally recording a limited burst of successive images of a fraction of one event, and the device comprises software means to provide synchronised image recording of said fraction of one event and slow motion representation of said limited burst of successive images during the total duration of said one event or multiple thereof.

2. Inspection device according to claim 1, characterised in that said software means involve an adjustable triggering signal for the coordinated image recording and slow motion representation.

3. Inspection device according to claim 2, characterised in that said software means provide for an internal trigger for the coordinated image recording.

4. Inspection device according to claim 2, characterised in that said software means are provided to be triggered by an external trigger signal to control the coordinated image recording.

5. Inspection device according to claim 1, characterised in that said device comprises optical means and sensor means for digital imaging, display screen means and/or memory means.

6. Inspection device according to claim 5, characterised in that said memory means comprise removable/exchangeable memory means.

7. Inspection device according to claim 5, characterised in that said sensor means for digital imaging comprise Charged Coupled Device (CCD) sensors.

8. Inspection device according to claim 5, characterised in that said sensor means for digital imaging comprise Complementary Metal Oxide Semiconductor (CMOS) sensors.

9. Inspection device according to claim 1, characterised in that said software means are provided for recording a burst (Rt) of 5 to 250 msec comprising a number of recorded frames (Nrf) between 3 and 200 frames at a frame recording frequency between 100 and 1000 frames/sec, and for reproducing said recorded burst as a slow motion representation during a time (Cms) ranging from 0.1 to 5 seconds corresponding to the duration of said repetitive event of defined duration, or a multiple thereof, at a reproduction frame frequency (Rff) ranging from 16-60 frames/sec.

10. Inspection device according to claim 9, characterised in that the device is provided for a number of recorded frames ranging from 5 to 50 frames.

11. Inspection device according to claim 1, characterised in that it comprises lighting means.

12. Inspection method for fast repetitive events of defined duration, involving recording successive images of the repetitive event and providing a synchronised slow motion representation of the recorded successive images of the repetitive event during the total duration of the repetitive event or a multiple thereof, characterised in that said method involves high frame rate image recording of a limited burst of successive images of a fraction of one event, and synchronised slow motion representation of said limited burst of successive images during the total duration of said one event or multiple thereof.

13. Method according to claim 12, characterised in that said high frame rate image recording of said burst of images of a fraction of one event and said synchronised slow motion representation of said burst are controlled by an adjustable triggering signal.

14. Method according to claim 13, characterised in that said adjustable triggering signal is an adjustable internal repetitive triggering signal.

15. Method according to claim 14, characterised in that the starting time for reproducing the recorded images (Str) is calculated from the triggering signal in function of the process cycle time (Cms).

16. Method according to claim 13, characterised in that said adjustable triggering signal is an adjustable external triggering signal.

17. Inspection method according to claim 12, characterised in that it involves a total process cycle time (Cms) ranging from 0.1 to 5 seconds, a slow motion representation of a fraction of the process cycle ranging from 5 to 250 msec, recorded as a time burst (Rt), comprising a number of recorded frames (Nrf) ranging from 5 to 200 frames, at a frame recording frequency (Frf) ranging from 100 to 5000 frames/sec, whereas the slow motion representation involves a reproduction frame frequency (Rff) ranging from 16-60 frames/sec.

18. Method according to claim 17, characterised in that the number of recorded frames (Nrf) ranges from 5 to 50 frames.

19. Method according to claim 17, characterised in that the process cycle time (Cms), the recorded burst time (Rt), the number of recorded frames (Nrf), the frame recording frequency (Frf) and the reproduction frame frequency (Rff) are linked by the following formulae

Rt=k·

Cms*Rff/Frf ms,

in which k is a factor expressing the number of process cycles during which the record burst (and optionally a “

separation pause”

) is reproduced,

Nrf=Rt*Frf

and

Nrf=k·

Cms*Rff