Rotary speed measuring device and rotary speed measuring method

A technology of rotational speed measurement and rotational speed, applied in measuring devices, linear/angular velocity measurement, velocity/acceleration/impact measurement, etc., can solve problems such as inconvenient use, and achieve the effect of convenient use

Inactive Publication Date: 2012-07-18
CHINA AUTOMOTIVE TECH & RES CENT
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  • Abstract
  • Description
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Problems solved by technology

Therefore, the above four types of methods are extremely inconvenient to

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  • Rotary speed measuring device and rotary speed measuring method
  • Rotary speed measuring device and rotary speed measuring method
  • Rotary speed measuring device and rotary speed measuring method

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Embodiment Construction

[0038] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0039] In order to directly measure the rotating speed of the rotating body outside the closed box, the rotating body under test does not need to have an overhanging end, the embodiment of the present invention provides a rotating speed measuring device and its measuring method, see the following description for details:

[0040] Vibration order theory is a corresponding relationship theory in vibration signal analysis, which is used to describe the corresponding relationship between a certain vibration signal and its harmonics in rotating machinery and the rotating frequency (power frequency) of the rotating body. The relationship is expressed as: O = f s / n.

[0041] Among them, O is the order of the vibration signal; f s is the fr...

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Abstract

The invention discloses a rotary speed measuring device and a rotary speed measuring method. The rotary speed measuring device is realized by the following steps: a vibration signal picking sensor is fixedly arranged on a shell of a rotary body to be measured, a supporting seat, a rigid foundation or a rigid object which is in direct contact with the rotary body to be measured and is adjacent to a rotary body; a vibration signal excited by the rotary body to be measured is acquired by the vibration signal picking sensor; the vibration signal is transmitted to a signal analyzing and processing module by a signal transmission lead wire; and the signal analyzing and processing module is used for analyzing and processing the vibration signal so as to extract the rotary speed of the rotary body to be measured. The rotary speed measuring method comprises the steps of: setting a sampling frequency, a data truncation length and a vibration order; carrying out vibration signal picking, filtering, data windowing, data truncation, data conversion, feature data extraction, feature data check, rotary speed calculation, rotary speed check, vibration order check and rotary speed real-time measurement; and according to the vibration order relation, calculating the rotary speed of the rotary body to be measured. The rotary speed measuring device can measure the rotary speed of the rotary body to be measured without directly contacting with the rotary body to be measured; and the measured rotary body does not need an outward extending end, so that the rotary speed measuring device is convenient to use.

Description

technical field [0001] The invention relates to the technical field of instruments and meters and automatic testing, in particular to a rotational speed measuring device and a measuring method thereof. Background technique [0002] The methods for automatically measuring the rotational speed of rotating bodies in the prior art can be generally divided into four categories: [0003] (1) The photoelectric method, that is, install a photoelectric code disc or paste reflective stickers on the rotating body, and convert the rotational speed information into pulsed optical information through contact with the light beam of the rotating body and a photoelectric sensor, and then further convert it into an electrical signal to measure the middle, The speed of the high-speed rotating body; [0004] (2) Electromagnetic method, that is, install an electromagnetic scale code disc on the rotating body, and convert the rotational speed information of the rotating body into pulsed magnetic...

Claims

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Application Information

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IPC IPC(8): G01P3/481
Inventor 于镒隆杨建军刘双喜栗国牟连嵩
Owner CHINA AUTOMOTIVE TECH & RES CENT
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