High-Speed Camera With Segmented Memory for Complete Trigger Capture
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Solution Overview
Problem
Conventional high-speed cameras face issues with incomplete recording of image frames due to trigger signal timing, leading to missed segments and incomplete capture of frames before and after the trigger signal, especially when trigger signals are inputted in an overlapping manner.
Innovation Solution
The camera employs a segmented video recording memory, region and sequence number management, pseudo trigger signal input, and delay/overlapping management to ensure all predetermined frames before and after the trigger signal are recorded, even when signals overlap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If video recording is performed in a single segment with ring buffer overwriting, then the memory structure is simple, but image frames may be missed when trigger signals are input in an overlapping manner
Solution Approach 1:
The video recording memory is divided into multiple segments (first segment, second segment, etc.), each capable of independent video recording. When a trigger signal is input during recording in the current segment, the system switches to the next segment to continue recording, ensuring that no image frames are missed even when trigger signals overlap. This segmentation resolves the contradiction by maintaining simple ring buffer structure within each segment while achieving reliable complete frame recording across segments.
2Reliability
If the video recording memory is divided into multiple segments, then frame recording completeness is improved, but the memory structure and management complexity increases
Solution Approach 1:
The memory is divided into multiple segments with each segment functioning as an independent recording unit using simple ring buffer overwriting. This segmentation allows the system to maintain simple memory structure within each segment while achieving reliable complete frame recording across segments by switching segments when trigger signals overlap.
Solution Approach 2:
The system prepares multiple segments in advance before video recording begins. Each segment is pre-configured with its ring buffer structure, so when a trigger signal is received during recording, the system can immediately switch to the next pre-prepared segment without complex real-time memory reorganization, thus improving reliability while controlling complexity.
3Productivity
If video recording stops after a predetermined number of frames are written, then storage space is efficiently utilized, but overlapping trigger signals may result in missed recording opportunities
Solution Approach 1:
By dividing the memory into multiple segments, the system can stop video recording in the current segment after writing a predetermined number of frames (maintaining storage efficiency), while simultaneously being ready to switch to the next segment for overlapping trigger signals (maintaining reliable trigger response). This resolves the contradiction by applying segmentation to create independent recording cycles.
Solution Approach 2:
The system ensures continuous recording capability across segments. When the current segment reaches its frame limit and stops recording, the next segment is immediately available to continue the useful action of recording if another trigger signal arrives, thus maintaining both storage efficiency and reliable trigger signal response without interruption.
Data Source
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AI summary
A conventional high-speed camera may be unable to video-record a required number of image frames. A high-speed camera according to the present invention includes a video recording memory that is divided into a plurality of segments and into which writing is performed in a ring buffer shape, a video recording unit that sequentially preforms video recording in the video recording memory and stops, when a predetermined number of image frames previously set are video-recorded, the video recording on the basis of input of a trigger signal, to leave the predetermined number of image frames in the video recording memory, region information management means for storing segment information and image frame information about in which of the segments image frames are recorded and which of the image frames is recorded in the segment, and image frame management means for acquiring previously set predetermined numbers of image frames respectively preceding and succeeding an image frame at the time when a trigger signal is inputted in the certain segment on the basis of image frame information of the segment into which the trigger signal is inputted and image frame information of the other segment that are stored by the region information management means.