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A timing control and recording device suitable for high-speed photographic images and sensor signals

A sensor signal, timing control technology, applied in the direction of image communication, color TV parts, TV system parts, etc. The effect of reducing errors, improving repeatability and stability

Active Publication Date: 2020-09-08
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For these reasons, in the characteristic analysis of transient flow, image signal analysis and sensor measurement analysis are often carried out independently, and it is difficult to establish the relationship between the overall characteristics of the flow, image and flow field characteristics

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  • A timing control and recording device suitable for high-speed photographic images and sensor signals
  • A timing control and recording device suitable for high-speed photographic images and sensor signals
  • A timing control and recording device suitable for high-speed photographic images and sensor signals

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Embodiment Construction

[0026] Hereinafter, exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. It should be understood that the present application is not limited by the exemplary embodiments described here.

[0027] In the current experimental measurement, the measurement and control system based on sensors and data acquisition cards and the visual image capture through high-speed cameras are two independent systems. Among them, the acquisition of signal parameters adopts a relatively mature measurement control system, which is realized by automatic control and timing triggering, and image acquisition is mostly realized by manual triggering of high-speed cameras. An important problem caused by manually triggering image acquisition is that it is impossible to know ...

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Abstract

The invention relates to a timing control and recording device suitable for high-speed photographic images and sensor signals, including a signal acquisition unit and a camera, and further comprising: a timing processing unit for outputting a synchronous trigger level signal of the signal acquisition unit and the camera , to synchronously trigger the start-stop recording of the camera and the signal acquisition of the signal acquisition unit; the pulse generator is used to convert the synchronous trigger level signal output by the timing processing unit into two pulse signals, wherein the camera receives the pulse signal , alternately starts shooting and stops shooting. The invention provides a trigger and recording device based on programmable time series for camera acquisition and sensor measurement in liquid measurement, which can automatically record the image signal captured by the camera and the digital signal collected by the signal acquisition unit on the time axis Match them together to realize the overall analysis of flow characteristics and parameters.

Description

technical field [0001] The invention belongs to the field of fluid observation, and in particular relates to a timing control and recording device suitable for high-speed photographic images and sensor signals. Background technique [0002] High-speed photography is a widely used experimental observation method for high-speed motion. For the motion of transient change, high-speed photography can shoot and record the dynamic change process at a high frequency, and the recorded images can directly reflect the change trend of the high-speed transient change process, providing reliable data for the study of high-speed motion mechanism and law . In the field of fluids, a large number of flows belong to unsteady flow fields or transient flows, such as turbulent flow, fluid velocity, flow field, bubbles, boiling, two-phase flow, etc. In the observation and analysis of these flow characteristics, high-speed photography plays an irreplaceable role. [0003] In most cases, the comp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/232
CPCH04N23/60H04N23/65
Inventor 方杰杨晨声张玉环王培聪蔡国飙
Owner BEIHANG UNIV
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