Calibration method of stay wire type speed measuring device
A speed-measuring device and pull-wire technology, applied in the field of calibration, can solve the problems of signal wheel circumference error and small calibration value, so as to reduce the cumulative effect and improve the calibration accuracy
Inactive Publication Date: 2021-03-16
中国人民解放军91550部队
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Problems solved by technology
[0003] In the prior art for the calibration of the cable-type speed measuring device, only the perimeter of the signal wheel is calibrated several times, and the average value is taken as the movement length of each revolution of the signal wheel. However, in the actual measurement process, it is found that the high-speed moving body The measurement result of the displacement is smaller than the actual moving distance of the high-speed moving body, that is, the calibration value is too small. Through laboratory tests, it is found that the diameter of the wire rope has a certain influence on the radius of the signal wheel, and the circumference error of the signal wheel is in the measurement process. Has a cumulative effect, so the calibration method needs to be improved
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Embodiment 1
[0026] The calibration method of a cable-type speed measuring device provided in this embodiment assumes that the signal wheel is wound with 3 layers of wire ropes, and the specific implementation steps are as follows:
[0027] S1. When the wire rope is wound around the signal wheel, record the number of turns of each layer of wire rope, the first layer is n 1 circle, n for layer 2 2 circle, the third layer is n 3 lock up;
[0028] S2. The pull-wire type speed measuring device is equipped with a photoelectric encoder on one side of the signal wheel according to the test measurement state, and the photoelectric encoder is connected to the computer through the measuring equipment; the preferred output of the photoelectric encoder is 500P, which not only meets the resolution requirements , which can minimize the amount of measurement data and improve the measurement efficiency of the system; power on the measurement equipment, then debug and set the equipment parameters to make...
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The invention discloses a calibration method of a stay wire type speed measuring device. The method comprises the following steps: when a steel wire rope is wound on a signal wheel, respectively recording the number of turns of each layer of steel wire rope; sequentially measuring the obtained distances among the mark 1, the mark 2, the mark 3 and the mark 4 of the steel wire rope by utilizing a meter ruler, the distances being respectively L1-2, L2-3 and L3-4; enabling a computer to read three groups of data acquired and recorded by measuring equipment to respectively obtain calibration pulsesignal quantities m1, m2 and m3 corresponding to the first, second and third layers of steel wire ropes; obtaining the number of turns of rotation, the perimeter and the distance between two pulses of a signal wheel corresponding to each layer of steel wire rope; and obtaining the rotating distance of the signal wheel in the whole process, namely the actual movement displacement of the high-speedmoving body. According to the method, the calibration precision of the stay wire type speed measuring device is improved, the cumulative effect of system errors is greatly reduced, the problem that the displacement measurement result of the stay wire type speed measuring device is inconsistent with the actual movement displacement result of the high-speed moving body is effectively solved, and the measurement accuracy of the cylinder outlet moment and the cylinder outlet speed of the high-speed moving body is improved.
Description
technical field [0001] The invention relates to a calibrating method, in particular to a calibrating method of a pull-wire speed measuring device. Background technique [0002] The pull-wire speed measuring device is a device used to complete the measurement of the motion parameters of the high-speed moving body in the launch tube. Before the measurement of the pull-wire speed measuring device, a certain length of steel wire rope needs to be wound in the wiring groove of the signal wheel. Small, need to wind 2 or even 3 layers of steel wire rope in the signal wheel wiring groove. [0003] In the prior art for the calibration of the cable-type speed measuring device, only the perimeter of the signal wheel is calibrated several times, and the average value is taken as the movement length of each revolution of the signal wheel. However, in the actual measurement process, it is found that the high-speed moving body The measurement result of the displacement is smaller than the...
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IPC IPC(8): G01P21/02
CPCG01P21/02
Inventor 解本政尤焜李博宋杰雷彪杨茁张乐威安振波尚诺诺王殿勋王智岩
Owner 中国人民解放军91550部队