Turn angle measuring method under large-bounce condition
A technology for angle measurement and beating conditions, which is applied to measurement devices, instruments, electrical devices, etc., can solve problems such as the inability to measure the real-time rotation angle of the central cylinder, the failure of the photoelectric encoder to work normally, and achieve real-time rotation angle data. High-precision real-time angle measurement, high-precision effect
Active Publication Date: 2014-03-12
GENERAL ENG RES INST CHINA ACAD OF ENG PHYSICS
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Problems solved by technology
In a vibrating environment, relative rotation may occur between the inner and outer layers, and the radial runout can usually reach 0.1mm to 0.5mm. In this case, the high-precision photoelectric encoder will not work properly, and it will not be able to measure the central cylinder. Real-time corner of the body
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[0023] Measurement object: the real-time rotation angle of the central cylinder of the pre-tightening hoop structure.
[0024] like Figure 1-Figure 4 As shown, the measurement of the rotation angle of the central cylinder 1 is carried out in the following steps:
[0025] (1) First complete the production of the calibrated output voltage-rotation angle curve: figure 1 is a schematic diagram of the installation structure of the central cylinder 1 and the test eddy current sensor 2, the calibration structure of this step is not shown in the figure, combined with figure 1 , assemble a calibration test piece of the same material and geometric shape as the central cylinder 1 on the indexing plate (not shown in the figure) (directly refer to figure 1 In the central cylinder 1), 24 calibration grooves are evenly set on the circumferential surface of the calibration test piece (directly refer to figure 1 The test groove on the central cylinder 1 in the center), set the calibration ...
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The invention discloses a turn angle measuring method under the large-bounce condition. The turn angle measuring method comprises the following steps of testing with a calibration test piece to obtain a calibration output voltage-turn angle curve; uniformly arranging a plurality of test grooves on the circumferential surface of a tested piece, and arranging test eddy current sensors at positions aligned to the surfaces of the test grooves; powering on the test eddy current sensors for working; carrying out high frequency filtering on signals output by the test eddy current sensors to obtain the corresponding relation between the real-time output voltage and the time of the test eddy current sensors; adopting a piecewise interpolation technology for processing according to the calibration output voltage-turn angle curve and the corresponding relation between the real-time output voltage and the time to obtain the corresponding relation between the real-time turn angle and the time of the tested piece, so as to complete the real-time turn angle measurement for the tested piece under the large-bounce condition. After the turn angle measuring method is adopted, high-precision real-time turn angle measurement for the tested piece under the large-bounce condition that the radial bounce is 0.1-0.5mm can be realized.
Description
technical field [0001] The invention relates to a method for measuring a rotation angle of a mechanical code, in particular to a method for measuring a rotation angle based on an eddy current mechanical code under the condition of large jump. Background technique [0002] In industrial applications, photoelectric encoders are usually used to measure the speed and angle of rotation of rotating machinery. It is a very mature technology that converts the mechanical geometric displacement on the output shaft into pulses or digital quantities through photoelectric conversion. The Φ417mm circular grating produced by Renishaw has an angular resolution of 0.004 seconds and an accuracy of ±0.5 seconds after electronic subdivision, but it also has high requirements for installation accuracy and shaft runout. The gap tolerance is required to be 0.8±0.08mm. But limited to this, the traditional photoelectric encoder is not suitable for the measurement of the rotation angle under the con...
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IPC IPC(8): G01B7/30
Inventor 王飞万方美王毅朱喜明杜强吕明徐有刚
Owner GENERAL ENG RES INST CHINA ACAD OF ENG PHYSICS