Low-sampling-frequency steel wire rope tension signal restoration method
A repair method and sampling frequency technology, which is applied in the engineering field, can solve the problems of tension signal distortion, inability to accurately reflect signal peaks and valleys, etc., and achieve the effect of reducing sampling frequency, reducing storage requirements, and improving transmission efficiency
Active Publication Date: 2021-12-21
中国人民解放军92942部队
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Problems solved by technology
[0004] The invention intends to aim at the civil and military fields, when the steel wire rope is subject to impact load and its tension changes rapidly, the tension signal is distorted due to the low sampling frequency, and the peak value and valley value of the signal cannot be accurately reflected, and a low sampling frequency tension signal measurement is provided Supplementary Restoration Techniques After the Event
Method used
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Embodiment 1
[0047] Embodiment 1. The steel wire rope tension signal restoration method of low sampling frequency, concrete steps are as follows figure 1 shown, including:
[0048] Step 1. Read the sampling frequency of the wire rope tension signal
[0049] Sampling frequency for reading from measuring equipment to rope tension measurement: f 采样 =100Hz
[0050] Step 2. Draw the time-domain diagram of the wire rope tension signal
[0051] Step 2.1, according to the tension measurement results, express the sampled time series as:
[0052] T 采样 ={t 1 , t 2 ,...,t N采样} = {0.01, 0.02, ..., 2.93} (1)
[0053] T 采样 The unit of measurement is s (second);
[0054] The time series T 采样 The wire rope tension signal sequence measured at each moment in , is expressed as:
[0055] S 采样 ={s 1 ,s 2 ,..,s N采样} = {18.8236, 21.2628, ..., 31.0334} (2)
[0056] S 采样 The unit of measurement is kN (kilonewton).
[0057] Step 2.2, establish a two-dimensional coordinate system, the horizontal ax...
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The invention provides a low-sampling-frequency steel wire rope tension signal restoration method. The method comprises the steps: S1, reading the sampling frequency of a steel wire rope tension signal; S2, drawing a time domain graph of the tension signal of the steel wire rope; S3, carrying out discrete Fourier transform on the tension signal of the steel wire rope, and finding the highest frequency of the tension signal; S4, setting the repair frequency F upper limit of the tension signal, wherein F repair = A * F upper limit, A is a frequency repair coefficient, and 20 <= A <= 100; and S5, obtaining a restored tension signal based on a restoration formula. Compared with the prior art, the repairing method has the advantages that the collected steel wire rope tension signals with low sampling frequency can be repaired, and part of peak and valley extreme values lost due to low sampling frequency can be eliminated; and, for a tension signal to be collected, the sampling frequency can be reduced, the tension signal data storage requirement is reduced, and the tension signal transmission efficiency is improved.
Description
technical field [0001] The invention belongs to the technical field of engineering and relates to a method capable of repairing low sampling frequency steel wire rope tension signals. Background technique [0002] In the engineering field, in order to grasp the stress of the wire rope, it is necessary to measure its tension. Generally, for the case of small load change rate, the sampling frequency of 100Hz (Hertz) to 1000Hz is sufficient, and the measured tension signal will not be distorted due to insufficient sampling frequency, such as missing key peaks and valleys. However, when the wire rope is subjected to short-term impact loads, such as the arresting tension of the aircraft arresting cables used on land airports and aircraft carriers, the impact process time is very short, and it is generally inconvenient to use wired measurement equipment; but when wireless measurement is adopted, due to the transmission rate Restriction cannot use excessively high sampling frequen...
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Login to View More IPC IPC(8): G06F30/20G06F17/14G06F119/14
CPCG06F30/20G06F17/141G06F2119/14
Inventor 程红伟黄金娥王岩磊杜贻群张扬付芸葛威张冉冉
Owner 中国人民解放军92942部队