Automatic Measurement Method of Geometric Characteristics of Randomly Bundled Cable Bundles
A geometric characteristic and automatic measurement technology, which is applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problem of harsh application conditions of the cable harness geometric characteristic parameter acquisition method model, and achieve high stability and accuracy , strong applicability and simple operation
Active Publication Date: 2018-07-20
HARBIN INST OF TECH
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[0007] The purpose of the present invention is to solve the problem that the existing method for obtaining the geometric characteristic parameters of cable bundles has strict applicable conditions. The present invention provides an automatic measurement method for the geometric characteristics of randomly bundled cable bundles
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[0034] combine Figure 1 to Figure 5 Describe this embodiment in detail. The method for automatically measuring the geometric characteristics of randomly bundled cable bundles described in this embodiment is realized based on a test system. The test system includes a cable bracket 1, two aerial plugs 2, and two transition boxes. 3. SMA interface 50 ohm resistor 4. Two switch matrices 5. Vector network analyzer 6. Host computer 7 and general interface bus 8.
[0035] The randomly bundled cable bundle to be tested may be a cable bundle obtained by randomly bundled cables of the same type or a cable bundle obtained by randomly bundled cables of different types. In this embodiment, a cable bundle bundled with three cables of the same type is taken as an example;
[0036] The two ends of a randomly bundled cable bundle to be tested are respectively connected to two transition boxes 3 through aviation plugs 2, one of which is connected to a switch matrix 5 through an SMA interface ...
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The invention discloses an automatic measurement method of geometric characteristics of randomly-bundled cable bundles and belongs to the field of electromagnetic measurement. In order to solve the problem of strict application conditions of the existing method for obtaining parameters of the geometric characteristics of cable bundles, a randomly-bundled cable bundle model based on fractal theory, a cable bundle outer characteristic parameter set based on fractal coefficient, a determinacy forward model for describing relation between the fractal coefficient and impedance characteristic, and a Bayes inverse estimation model of the forward model are respectively built; with combination of a Markov Chain Monte algorithm, the Bayes inverse estimation model is solved by using the actual measurement data of the cable bundle outer impedance characteristic; the calculation is carried out to obtain optimal estimation of the fractal coefficient so as to obtain the distribution characteristic of the geometric characteristics of the randomly-bundled cable bundles. The method is applicable to measurement of the geometric characteristics of various randomly-bundled cable bundles.
Description
technical field [0001] The invention belongs to the field of electromagnetic measurement. Background technique [0002] The coupling problem of cable bundles is a typical problem faced in the electromagnetic compatibility design of aviation and spacecraft, and this problem is also receiving more and more attention. In the early stage of electromagnetic compatibility design, the geometric characteristics of the cable harness must first be determined before its electromagnetic compatibility performance can be studied. The current approximate description of randomly bundled cable bundles uses a uniform transmission line model, which assumes that the cross-sectional geometry of the cable bundle does not change axially between the nodes of the transmission line network. This solution is a compromise between model complexity and accuracy. However, the actual situation is that due to the limitation of the cable binding process, even if the same type and batch of cable bundles are...
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IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 张刚王天昊白瑾珺王立欣
Owner HARBIN INST OF TECH