CN1283096C - A method for improving data rate of video tracking system and used equipment - Google Patents
A method for improving data rate of video tracking system and used equipment Download PDFInfo
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- CN1283096C CN1283096C CN200310105199.6A CN200310105199A CN1283096C CN 1283096 C CN1283096 C CN 1283096C CN 200310105199 A CN200310105199 A CN 200310105199A CN 1283096 C CN1283096 C CN 1283096C
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Abstract
The present invention relates to a method and a device for improving data rate of a video tracking system. In the method, firstly an outside scene forms a beam of parallel light by a front object lens; then the parallel light forms a beam of refraction parallel light and a beam of reflection parallel light which are identical by a semireflector arranged at a 45 DEG angle with the parallel light, wherein the refraction parallel light is converged and projected to a target plane of a camera by a lens assembly, and the reflection parallel light is reflected by a total reflector arranged at a 45 DEG angle with the reflection parallel light and then is converged and projected to a target plane of a camera by the lens assembly. The synchronous time sequences of the two cameras differ by a half of field period, and the field periods are identical; vision signals output by the two cameras are processed by a video tracking device to obtain target-missing quantity of a target, and the target-missing quantity output by the video tracking device is sent to a servo system to finish the tracking to the target. The video tracking system built by the present invention can obtain twice output data rate of the target-missing quantity to achieve the purpose of improving the tracking performance of the tracking system.
Description
Technical field
The invention belongs to the electro-optical tracking device constructing technology, specifically a kind of method and equipment therefor that improves the video frequency following system data transfer rate, utilize the video frequency following system of this method construct can obtain the data transfer rate that twice target miss distance is exported, reach the purpose of the tracking performance that improves tracking system.
Background technology
Photoelectric follow-up is widely used in imaging guided weapon system and fire control system, have characteristics such as good concealment, anti-electromagnetic interference capability be strong, video frequency following system is being undertaken target acquisition, target miss distance and work such as is being resolved, photoelectric follow-up is played crucial effects, and its miss distance output data rate is determining tracking performances such as the tracking accuracy of photoelectric follow-up, maximum tracking velocity, transient characteristic; But owing to limit by the photoelectronic imaging device, the CCIR of the most of employing of common camera at present system, its field frequency is 50Hz, also is 50Hz based on the target miss distance output data rate of the video frequency following system of this video camera; And the video camera of high field frequency is except that shortcomings such as sensitivity is low, and price is also quite expensive.These effects limit the further raising of photoelectric follow-up overall objective, this method can overcome the above problems well.
Summary of the invention
In order to overcome the above problems, the object of the present invention is to provide a kind of practicality and the method and the equipment therefor of the video frequency following system of cheap high target miss distance output data rate.
The technical solution adopted for the present invention to solve the technical problems is as follows:
Improve the method for video frequency following system data transfer rate: extraneous directional light forms a branch of directional light through preceding object lens earlier, described directional light obtains the identical directional light of other two-way through one with the half-reflecting mirror of its angle at 45 installation again, wherein one the tunnel for the refraction directional light projects on the target surface of video camera after one group of lens converges, and another road projects on the target surface of video camera after one group of lens converges behind the completely reflecting mirror of angle at 45 with it installation for the reflection directional light again; Described two video camera synchronous sequence phase difference of half field duration, the field duration is identical; The vision signal of their output obtains the miss distance of target after video tracker is handled, the miss distance of video tracker output is sent into servo system, finishes the tracking to target;
The invention has the beneficial effects as follows:
1. because the present invention reaches the purpose of the miss distance output data rate that improves video tracker by control video camera work schedule, with respect to the high field frequency video camera of direct employing, under the identical condition of data transfer rate, the photoelectric follow-up cost that adopts conventional video camera composition is less than adopting 1/10th of high field frequency video camera.
2. the sensitivity of conventional video camera will be higher than high field frequency video camera more than 10 times, and this just makes the photoelectric follow-up detection range that adopts this method to constitute under identical optical parameter and meteorological condition will be far longer than the detection range of the photoelectric follow-up that adopts high field frequency video camera.
3. adopt the photoelectric follow-up of this method structure to also have another potential application, because video tracker can be handled the two-path video signal simultaneously, can utilize these characteristics to improve the signal to noise ratio of echo signal, also can adopt multisensor Data Fusion technology to improve the overall objective of photoelectric follow-up.
Description of drawings
Fig. 1 is a principle of the invention structural representation.
Fig. 2 is the synchronous sequence of two video cameras in the one embodiment of the invention system.
Fig. 3 uses two outer video camera schematic diagrams synchronously for one embodiment of the invention.
Fig. 4 adopts the schematic diagram of inter-sync first video camera 1 outer synchronous second video camera 2 for another embodiment of the present invention.
Fig. 5 adopts the schematic diagram of outer synchronous first video camera, 1 inter-sync, second video camera 2 for further embodiment of this invention.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
Embodiment 1
As shown in Figure 1, preceding object lens I receives extraneous first directional light and obtains directional light A, the first directional light A obtains second identical directional light B of two-way and the 3rd directional light C through one with the half-reflecting mirror II of its angle at 45 installation, wherein the 3rd directional light C is the refraction directional light, after converging, the first mirror group III projects on the target surface of first video camera 1, the described second directional light B is the reflection directional light, the completely reflecting mirror IV that installs through an angle at 45 with it obtains directional light D, and directional light D projects on the target surface of second video camera 2 after the second mirror group V converges; First video camera 1 is two identical video cameras of technical indicator with second video camera 2, finishes the function that the scenery conversion of signals is become vision signal, guarantees when requiring system to debug that the optical axis of two video cameras is parallel to each other.
The principle of the invention is as follows:
The present invention utilizes two coaxial video cameras to improve the data transfer rate of video frequency following system; Video tracker can be handled the two-path video signal simultaneously, and the two-path video signal comes from two coaxial video cameras respectively, and one of them synchronous sequence lags behind another half field duration.Present embodiment is an example with CCIR system video camera, and the target miss distance data transfer rate that obtains after the single channel vision signal is handled is 50Hz, then can be obtained the data transfer rate of 100Hz by the video frequency following system of this method structure.
As shown in Figure 3, apparatus of the present invention comprise preceding object lens I, and described preceding object lens I is a negative lens, and its function is to receive extraneous incident light to form the first directional light A.Half-reflecting mirror II and first directional light A angle at 45, the function of half-reflecting mirror II is, the first directional light A is divided into mutually perpendicular homenergic second directional light B and the 3rd directional light C, the first～two mirror group III is two groups of identical mirror groups with V, form by four lens respectively, along optical path direction is respectively a positive lens, a negative lens, a positive lens, a negative lens from front to back, its major function is directional light to be converged project on the video camera target surface, and its another function is to improve the image quality of optical system; The function of completely reflecting mirror IV is to finish the corner of light path, is beneficial to design of miniization, and being in the present embodiment changes 90 ° to the second directional light B to become directional light D; First video camera 1 is two identical video cameras of index with second video camera 2, finishes photoelectric converting function, and vision signal obtains the miss distance of target and sends into servo system 4 after video tracker 3 is handled.The optical axis that guarantees two video cameras when the present invention requires system to debug is parallel to each other.
Described video tracker has two video signal input terminals, can handle the two-path video signal simultaneously, calculates the miss distance of target after 3 pairs of two-path video signal processing of video tracker, and miss distance send servo system 4, finishes the tracking to target.Video tracker 3 exportable two-way video camera synchronizing signals, two-way synchronous signal field period T is identical, phase phasic difference T/2, referring to shown in Figure 2, that is: because two video camera synchronous sequence phase difference of half field duration, so per half field duration just can be exported one group of target miss distance data, that is to say, target miss distance output data rate is doubled.
Described video tracker 3 self structure of present embodiment and to two-path video Signal Processing the miss distance of target (as calculate), and servo system 4 is a prior art.
Embodiment 2
Difference from Example 1 is:
Described video camera is: a video camera with internal synchronization mode work, from the vision signal of its output, isolate synchronizing signal, and generate one tunnel synchronizing signal another video camera synchronously based on this with external sync mode work; As shown in Figure 4, can adopt inter-sync first video camera 1 outer synchronous second video camera 2; Shown in 5, also can adopt outer synchronous first video camera, 1 inter-sync, second video camera 2.
Claims (6)
1. method that improves the video frequency following system data transfer rate, it is characterized in that: extraneous scenery forms a branch of first directional light (A) through preceding object lens (I) earlier, described first directional light (A) obtains identical second directional light (B) of other two-way and the 3rd directional light (C) through one with the half-reflecting mirror (II) of its angle at 45 installation again, wherein the 3rd directional light (C) is the refraction directional light, converge on the target surface that projects first video camera (1) through the first mirror group (III), second directional light (B) is the reflection directional light, converges on the target surface that projects second video camera (2) through the second mirror group (V) after the completely reflecting mirror of installing through an angle at 45 with it (IV) reflects again; Described two video camera synchronous sequence phase difference of half field duration, the field duration is identical; The vision signal of their output obtains the miss distance of target after video tracker is handled, the miss distance of video tracker output is sent into servo system, finishes the tracking to target.
2. according to the method for the described raising video frequency following system of claim 1 data transfer rate, it is characterized in that: wherein said video tracker has two video signal input terminals, can handle the two-path video signal simultaneously; Video tracker calculates the miss distance of target after to the two-path video signal processing, and miss distance send servo system, finishes the tracking to target.
3. according to the method for the described raising video frequency following system of claim 1 data transfer rate, it is characterized in that: wherein said video camera can be two video cameras that adopt external sync mode work, finishes the opto-electronic conversion of image.
4. according to the method for the described raising video frequency following system of claim 3 data transfer rate, it is characterized in that: the optical axis of described two video cameras is parallel to each other.
5. according to the method for the described raising video frequency following system of claim 1 data transfer rate, it is characterized in that: described video camera can also adopt an internal synchronization mode video camera, from the vision signal of this video camera output, isolate synchronizing signal, postpone again to form one tunnel synchronizing signal video camera of another external sync mode synchronously after half field duration.
6. according to the method for the described raising video frequency following system of claim 1 data transfer rate, it is characterized in that: described half-reflecting mirror (II) is a spectroscope, finishes first directional light (A) is divided into equal second directional light (B) of two beam energies and the function of the 3rd directional light (C).
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| Application Number | Priority Date | Filing Date | Title |
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| CN200310105199.6A CN1283096C (en) | 2003-11-26 | 2003-11-26 | A method for improving data rate of video tracking system and used equipment |
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| CN200310105199.6A CN1283096C (en) | 2003-11-26 | 2003-11-26 | A method for improving data rate of video tracking system and used equipment |
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| CN1283096C true CN1283096C (en) | 2006-11-01 |
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| CN104122900B (en) * | 2014-07-30 | 2017-01-25 | 中国科学院光电技术研究所 | Compound axis tracking system based on rotary biprism |
| CN112333428B (en) * | 2020-10-26 | 2022-08-30 | 浙大网新科技股份有限公司 | AI-based large-view monitoring processing method and system for common camera |
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