Passive infrared ranging method for ground targets under various weather conditions
A ground target and passive infrared technology, applied in the field of physics, can solve the problems of narrow target application range, limited detection distance of the ranging formula, poor ranging effect, etc., achieve high signal-to-noise ratio and increase the application range , Improve the effect of ranging accuracy
Active Publication Date: 2019-07-23
XIDIAN UNIV
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Problems solved by technology
The disadvantage of this method is that this method only has good ranging accuracy for air targets above 1000K within a range of 20km. For low-temperature targets, such as objects below 500K, even within a range of 5km , the ranging effect is also very poor, and the scope of application to the target is narrow
The disadvantage of this method is that the detection accuracy of the ranging formula of this method is severely limited by the surrounding environment and detection distance of the target
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[0027] The present invention will be further described below in conjunction with the accompanying drawings.
[0028] refer to figure 1 , to further describe the specific steps of the present invention.
[0029] Step 1, evaluate the type and location of the target to be tested.
[0030] Aim the infrared optical system at the target to be measured, and obtain the type and position of the target to be measured by zooming.
[0031] Step 2, intercepting different wave bands.
[0032] Use the band interception tool to divide the infrared light radiated by each type of target to be measured into two different bands of 3.5-4.0 μm and 4.3-4.8 μm.
[0033] Selection of band interception tool: Fourier transform infrared spectrometer can be selected as the band interception tool, which has a large volume and good optical performance, or an optical filter optical system can be used to make use of its spectroscopic characteristics, which is small in size and slightly poor in optical perf...
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The invention discloses a passive infrared ranging method of a ground target under various weather conditions. The method includes the following steps: a. evaluating the type and bearings of a to-be-tested target; 2. intercepting different wave bands; 3. acquiring the corresponding optical radiation energy of two different wave bands; 4. calculating the distance between the to-be-tested target andan observer; and 5.outputting the distance between the to-be-tested target and the observer. According to the invention, the method can divide the infrared light that is radiated by the to-be-testedtarget to two different wave bands, and acquires the interference components corresponding to different wave bands through a Fourier transform infrared interferometer, conducts line-by-line integration on the corresponding interference component at integration intervals are configured with different wave bands so as to obtain corresponding optical radiation energy. Therefore, the method herein canexpand the application range of targets, is suitable for different weather conditions, and acquires a more accurate distance between the to-be-tested target and the observer.
Description
technical field [0001] The invention belongs to the technical field of physics, and further relates to a ground target passive infrared ranging method adaptable to various weather conditions in the technical field of photoelectric detection and photoelectric countermeasures. The present invention can be used in multiple weather conditions (no cloud, cumulus, altostratus, stratus, stratus / cumulus, nimbostratus, drizzle, light rain, moderate rain, heavy rain, rainstorm, etc.) The radiant energy of different wave bands is used to measure the distance of infrared targets on the ground. Background technique [0002] Various weather conditions (no cloud, cumulus, altostratus, stratus, stratus / cumulus, nimbostratus, drizzle, light rain, moderate rain, heavy rain, heavy rain, etc.), obtain different wave bands under different weather conditions Radiant energy, ranging from infrared targets. [0003] Qiao Ya and others proposed an infrared passive ranging method in their paper "Inf...
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IPC IPC(8): G01S11/12G01B11/02
Inventor 付小宁陈立强景钊雷新忠
Owner XIDIAN UNIV