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Whole-course real-time detection system of spatial stereoscopic plotting camera time synchronization accuracy and method thereof

A technology of time synchronization accuracy, surveying and mapping camera, applied in the direction of measuring devices, instruments, etc., can solve the problem of inability to detect the dynamic change of camera time in real time for a long time, and achieve the effect of real-time measurement and reduced time.

Active Publication Date: 2014-12-24
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0006] In order to solve the problem that the existing conventional instruments cannot detect the dynamic change of the camera time synchronization error during the working process of the three-dimensional surveying and mapping camera in real time for a long period of time, the present invention provides a system and method for real-time detection of the time synchronization accuracy of the three-dimensional surveying and mapping camera in the whole process

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  • Whole-course real-time detection system of spatial stereoscopic plotting camera time synchronization accuracy and method thereof
  • Whole-course real-time detection system of spatial stereoscopic plotting camera time synchronization accuracy and method thereof
  • Whole-course real-time detection system of spatial stereoscopic plotting camera time synchronization accuracy and method thereof

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specific Embodiment approach 1

[0028] Specific implementation mode 1. Combination figure 1To illustrate this embodiment, the full real-time detection system for the time synchronization accuracy of the spatial three-dimensional surveying and mapping camera consists of a second pulse and line / frame synchronization signal input cable 10, a second pulse and line / frame synchronization signal conversion unit 20, and a second pulse and line / frame synchronization signal Signal output cable 50, FPGA time synchronization unit 30, data acquisition card 40, bus monitoring cable 60, bus communication card 70 and data processing computer system 80 are composed.

[0029] Described second pulse and line / frame synchronous signal input cable 10 are made up of GPS second pulse cable and line / frame synchronous signal cable, in the present embodiment GPS second pulse cable connects ground GPS simulation equipment and second pulse and line / frame synchronous signal The conversion unit 20 transmits the GPS second pulse signal; th...

specific Embodiment approach 2

[0039] Specific embodiment two, combine figure 2 and image 3 Illustrate this embodiment, the whole process real-time detection method of time synchronization accuracy of spatial stereo surveying and mapping camera, this method is realized by the following steps:

[0040] In step A, the GPS emulation device and the cable between the imaging unit and the camera controller are replaced with the pulse-per-second and line / frame synchronization signal input cable 10 and the pulse-second and line / frame synchronization signal output cable 50 . The specific process is to disconnect the GPS second pulse connection cable between the GPS simulation device and the camera controller, disconnect the cable containing the line / frame synchronization signal between the imaging unit and the camera controller; connect the second pulse to the line / frame synchronization signal The input end of input cable 10 is connected in the second pulse output interface of GPS simulation equipment and the lin...

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Abstract

Disclosed are a whole-course real-time detection system of spatial stereoscopic plotting camera time synchronization accuracy and a method thereof. The invention relates to a spatial stereoscopic plotting camera and solves the problem that dynamic change of camera time synchronization errors during the spatial stereoscopic plotting camera operation process can not be detected at real time for a long time by the use of a present common device. The system comprises: a second pulse and line / frame synchronising signal input cable, a second pulse and line / frame synchronising signal transfer unit, a second pulse and line / frame synchronising signal output cable, a FPGA time setting unit, a data collection card, a bus watching cable, a bus communication card and a data handling machine system. According to the method, image time setting information is directly received from internal bus through a bus watching mode, thus substantially reducing the time of separating image data and extracting image time setting information. By the adoption of the system, real-time measurement, recording and display of spatial stereoscopic plotting camera time synchronization accuracy are realized. According to the invention, real-time detection and whole-course recording of dynamic changes of camera time synchronization errors can be realized during the photographing process of the spatial stereoscopic plotting camera.

Description

technical field [0001] The invention relates to a spatial three-dimensional surveying and mapping camera, in particular to a system and method for whole-process real-time detection of the time synchronization accuracy of a spatial three-dimensional surveying and mapping camera. Background technique [0002] The space stereo mapping camera uses the satellite as a platform to measure the digital map, digital elevation map and digital orthophoto map of the surface of the earth and other planets through the acquired stereo image, attitude, orbital position and other information. Planning, resource census and other fields play an important role. Since the position and attitude of the satellite are constantly changing during flight, if the camera’s time synchronization accuracy is not high, even if the orbit positioning accuracy and attitude measurement accuracy are high, the spatial stereoscopic mapping camera’s mapping accuracy will be reduced due to the mismatch between the ima...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C25/00
Inventor 武星星刘金国
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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