A grating encoder low-speed precision detection device

Abstract

Disclosed is a raster encoder low-speed precision detection apparatus. The apparatus comprises a housing, an encoder signal refining module, a data processing circuit module compose of a DSP, and a data interaction communication interface. The apparatus utilizes an external crystal oscillator as a clock source and the DSP as a data acquisition and processing unit. A periphery circuit comprises an encoder signal refining circuit, a serial communication circuit and a display module. The apparatus can, through reading signals of a raster encoder installed on a rotation shaft, measure the rate precision in a mode of measuring an angle at fixed time or in a mode of measuring time through a fixed angle. The detection apparatus provided by the invention employs the embedded DSP as the data processing unit, and compared to a conventional mode of realizing rate detection by use of a PCI data collection card by means of industrial control computer software, the apparatus size is reduced to a great degree; the apparatus utilizes a refining circuit module, such that a user can, according to actual needs, adjust the refining multiple of a signal, thus the detection precision is improved; and since the DSP has a quite high data processing capability, the high efficiency and stability of the test apparatus are ensured.

Description

technical field [0001] The invention relates to a device for low-speed precision detection of a speed turntable, which is suitable for low-speed precision detection of a turntable, and can also be used for low-speed precision detection of other motion equipment using a grating encoder as a sensor. Background technique [0002] The turntable is the main equipment for inertial product development, testing, factory evaluation and calibration. The position and speed accuracy of the turntable are the main factors affecting the calibration. Especially for the speed turntable, its rate characteristic is very important. It is necessary to complete the technical indicators of the turntable equipment before leaving the factory. detection. For the case of high speed (ω≥10° / s), the counter is usually used for detection, while for the case of low speed (ω<10° / s), other detection methods can only be used. The precision of the angle sensor of the turntable is very high, and the grating...

AI Technical Summary

Problems solved by technology

The traditional low-speed detection device generally uses the encoder signal acquisition card provided by the grating encoder manufacturer, usually with a PCI interface, using the industrial control computer as the platform, and realizing data acquisition and processing through the software on the industrial computer, which makes the low-speed detection must be matched An industrial control computer makes the detection device bulky and inconvenient to use

Especially when the turntable is delivered to the use site for inspection and regular standard inspection, the equipment that is not easy to carry brings great inconvenience to the production task

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