Imaging system time keeping and time service precision test system and test method
An imaging system and accuracy testing technology, applied in time division multiplexing systems, image communication, television, etc., can solve the problems of low test accuracy, test limitations, and the inability to accurately test the correctness of auxiliary data time, etc., to achieve Wide range of use, simple and easy-to-operate test method, and simple structure
Pending Publication Date: 2022-08-09
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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[0006] In order to solve the problem that the oscilloscope directly measures the characteristic signal when testing and assessing the punctuality and timing accuracy of the imaging system used for monitoring and video measurement, the present invention cannot accurately test the correctness of the time in the auxiliary data and the test has limitations. The way of shooting digital tubes, the technical problem of low test accuracy, provides a timing accuracy test system and test method for imaging systems
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[0046] In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.
[0047] like figure 1Shown is a schematic diagram of the connection of an imaging system timing accuracy test system, including an antenna 1, a receiver 2 (preferably a Beidou / GPS receiver), a demodulation unit 3, a high-precision timing machine and a delay device 4 , a high-precision temperature compensation crystal oscillator 5, an interface unit 6, a digital...
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The invention belongs to a time-keeping and time-service precision testing method, and aims to solve the problems that when the time-keeping and time-service precision of an imaging system for monitoring and video measurement is tested and assessed at present, the correctness of time in auxiliary data cannot be accurately tested and the testing is limited in a mode of directly measuring characteristic signals by adopting an oscilloscope. The invention aims to solve the technical problems of low testing precision due to the adoption of a nixie tube shooting mode in the prior art, and provides the imaging system time keeping and time service precision testing system and testing method which generate a testing target with time information and display the target with the current time information within specific time for the imaging system to shoot. Time can be directly associated with an image shot and output by an imaging system. And under the condition that the product cannot lead out the characteristic signal, the test precision is high.
Description
technical field [0001] The invention belongs to a punctual timing accuracy testing method, in particular to a punctual timing accuracy testing system and a testing method for an imaging system. Background technique [0002] Time synchronization is to align the clocks in different places, use one time as the standard time, and adjust the other clock to the standard time, so as to achieve clock synchronization. With the development of science and technology, high-precision time synchronization is widely used in various industries. [0003] Imaging systems, especially those used for surveillance and video measurement, have increasingly higher requirements for time synchronization. The feature of this type of product is that it can directly store the time information in the auxiliary data of the image, and generally it is necessary to assess the punctuality and timing accuracy of the system. In the actual test and assessment of this type of product, there are the following pro...
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IPC IPC(8): H04N17/00H04J3/06
CPCH04N17/002H04J3/0602H04J3/0638Y02B20/40
Inventor 曹昆刘艺宁周艳郑党龙万伟刘尚阔
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI