Apparatus and method for measuring deformation of shock absorption block in launching cylinder
A shock-absorbing block and launch tube technology, which is applied in the direction of electromagnetic measuring devices, electric/magnetic solid deformation measurement, etc., can solve problems such as difficult measurement, high requirements, and inability to choose shock-absorbing blocks, and achieve the effect of small space and convenient installation
Active Publication Date: 2019-06-11
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology
[0004] The purpose of the present invention is to provide a device and method for measuring the deformation of the shock absorbing block in the launch tube, so as to solve the problem of high requirements and difficult measurement of the existing measuring method, and solve the problem that the measurement point on the shock absorbing block cannot be selected in the traditional measurement. question
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Embodiment 1
[0045] Such as image 3 As shown, the stainless steel material used for the cantilever beam 4 is 65MnR, the length of the cantilever beam 4 is 100 mm, the width is 10 mm, and the thickness is 1 mm. The selected strain gauge 5 has a resistance value of 350 and a measuring range of 2500 με. Using DEWESoft Sirius, the sampling frequency is 1000Hz.
[0046] The measuring device has been calibrated three times, and the calibration data and calibration calculation results of the measuring device are shown in Table 1 and Table 2, wherein the deformation is the display value of the push rod displacement sensor 10, and the measured deformation results are as follows image 3 As shown, the x-axis is the test time, and the y-axis is the deformation.
[0047] Table 1 Calibration data of measuring device
[0048]
[0049] Table 2 Calibration calculation results
[0050]
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The invention discloses an apparatus and method for measuring deformation of a shock absorption block in a launching cylinder. The apparatus comprises a transmission member installed on the surface ofthe shock absorption block, wherein the transmission member is used for driving the shock absorption block to have relative displacement along with the deformation of the shock absorption block, anda moving direction of the transmission member is consistent with a radial direction of the launching cylinder; and the apparatus also comprises a cantilever beam installed in the launching cylinder, the installation direction of the cantilever beam is perpendicular to the moving direction of the transmission member, one end of the cantilever beam is connected with the transmission member, the other end of the cantilever beam is also adhered with a strain gauge, and the strain gauge is also used for being electrically connected to an external data acquisition system; and the strain gauge is used for detecting a strain value generated by the extrusion of the cantilever beam by the transmission member. According to the invention, the space occupied in the launching cylinder is very small, andthe installation is very convenient; measurers can be installed at multiple points in the launching cylinder according to the requirements, and a test wire can be led out at a sealed joint, thereby realizing the multipoint measurement; and the measurers can obtain the instantaneous deformation of the shock absorption block by virtue of experiments.
Description
【Technical field】 [0001] The invention belongs to the technical field of measuring the deformation amount of a shock absorbing block in a missile launching tube, and in particular relates to a device and a method for measuring the deformation amount of a shock absorbing block in a launching tube. 【Background technique】 [0002] When the missile is installed in the launch tube, it is necessary to use a shock absorber to isolate it from the wall of the tube. During transportation and storage, the deformation and energy absorption of the shock-absorbing block can be used to reduce the impact force and protect the projectile. By measuring the deformation of the shock absorber, the impact force on the missile and the initial attitude of the missile can be analyzed. [0003] The deformation of the shock-absorbing block refers to the displacement of the surface of the shock-absorbing block in contact with the missile along the radial direction of the launch tube. The conventional ...
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IPC IPC(8): G01B7/16
Inventor 吕翔赵晓帅刘佩进陈剑
Owner NORTHWESTERN POLYTECHNICAL UNIV
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