Portable vibration data collector and method based on embedded technology

Abstract

The invention relates to the data acquisition and equipment fault diagnosis field, in particular to a portable vibration data acquisition device and a method based on embedded technology. The device comprises an acceleration transducer, an acceleration transducer interface module, a capacitance isolation module, a programmed control amplifying module, a self-adapting antialiasing filter, an AD converter and the bus interface of the converter which are connected in turn; moreover, the device also comprises an ARM minimum system, a DIM144 interface module, a singlechip as well as an electronic label module, a keyboard, a power source management and voltage conversion module which are connected with the singlechip; in addition, the programmed control amplifying module and the self-adapting antialiasing filter are also connected with a singlechip 8. The device communicates with an upper computer through a serial port to assign point inspection task, and transmits the sampling frequency in the point inspection task to the singlechip; moreover, the singlechip sets the lowpass cut-off frequency of the antialiasing filter according to the sampling frequency. With low power consumption, convenient operation and powerful data analysis function, the device has the characteristics of real time and accuracy.

Description

technical field [0001] The invention relates to the fields of data acquisition and equipment fault diagnosis, in particular to a portable vibration data acquisition device and method based on embedded technology Background technique [0002] The data acquisition analyzer is an instrument with on-site recording and analysis functions or a portable analysis instrument with on-site recording and off-line analysis of the status data of machinery and equipment. It takes the state parameter signal of the equipment measured by the vibration sensor or process sensor as input, and forms a detection system with various measurement analysis techniques and diversified display formats. diagnosis and other fields. It can form an independent monitoring and diagnosis system together with a computer, and it is one of the computer-aided diagnosis methods for machinery and equipment. [0003] There are many types of existing data acquisition analyzers at home and abroad, such as Huayang 106 ...

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Problems solved by technology

[0003] There are many types of existing data acquisition analyzers at home and abroad, such as Huayang 106 of Shanghai Huayang Testing Instrument Co., Ltd., but there are mainly shortcomings in the following aspects: First, from the perspective of its internal processor, most of them are based on 8-bit Or 16-bit single-chip microcomputer as the core; limited by the processing speed of its processor, these data collectors often do not have data analysis function or the data analysis function is very poor, and because of the lack of operating system support, let alone the graphical user interface The concept is not conducive to workers doing simple fault diagnosis on site; secondly, the existing data collectors are not very good in real-time performance, and the set AD sampling accuracy is not high, which directly leads to the signal being in the frequency domain Furthermore, the low-pass cut-off frequency of the anti-aliasing filter has limited gears, and there are relatively large restrictions when setting the sampling frequency, and the versatility is not good; some companies require data acquisition and analyzers to be checked and managed function, which is usually not available in many products or does not meet the requirements of the enterprise; finally, the data recovery method of the existing data collector is rigid, usually using serial port communication, and the data must be recovered through special host computer software, reducing Improve the inspection efficiency of the enterprise

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