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ARM-based electro-hydraulic servo valve frequency characteristic test data acquisition board

A technology of frequency characteristic test and data acquisition board, applied in the direction of frequency measurement device, frequency to amplitude conversion, etc., can solve the problems of large volume, complicated operation, difficult maintenance, etc., achieve good real-time performance, meet test requirements, and high sampling speed Effect

Inactive Publication Date: 2012-07-25
湖南睿创宇航科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Traditional testers are bulky and bulky, complicated to operate, and difficult to overhaul

Method used

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  • ARM-based electro-hydraulic servo valve frequency characteristic test data acquisition board

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Embodiment Construction

[0014] Based on the ARM electro-hydraulic servo valve frequency characteristic test data acquisition board and the sensor external dynamic test cylinder developed by our company (patented technology applied on the same day) are integrated to form a complete electro-hydraulic servo valve frequency characteristic test device. The invention measures the frequency characteristics of an electro-hydraulic servo valve based on a multi-step excitation method. The basic principle of this method is to apply a sinusoidal signal of a certain frequency and a certain amplitude to the servo valve, and the response signal of the servo valve - the output flow is also a sinusoidal signal of the same frequency, but its amplitude and phase are different; within the frequency range of the test , select several frequency test points; at each test point, a sine wave with a certain frequency and amplitude is applied to the tested valve for excitation, and the response signal of the measured object is ...

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Abstract

The invention discloses an ARM-based electro-hydraulic servo valve frequency characteristic test data acquisition board which comprises a CPU (central processing unit), an AD9833, an AD5160, a blocking circuit, an SPA bus and an AD7323 and is characterized in that: the SPA bus is connected with the CPU, the AD9833, the AD5160 and the AD7323 respectively; the tail end of the AD5160 is connected with the blocking circuit; the blocking circuit is connected with the AD7323 through a channel 0 and connected with a tested object; and the tail end of the tested object is connected with the AD7323 through a channel 1. The invention aims to apply a sine signal with set frequency and set amplitude to the tested servo valve, acquire the output signals of a speed sensor and a displacement sensor of a dynamic measurement cylinder and realize data communication through a serial port and an upper computer.

Description

technical field [0001] The invention relates to a data acquisition board, in particular to a data acquisition board based on ARM electro-hydraulic servo valve frequency characteristic test. Background technique [0002] The electro-hydraulic servo valve frequency characteristic tester is the most important part of the traditional electro-hydraulic servo valve frequency characteristic test device. It is designed with discrete analog electronic components and manufactured and sold by professional enterprises. Traditional testers are bulky and bulky, complicated to operate, and difficult to overhaul. With the high popularization and development of modern micro-processing technology and computer technology, it is very necessary and possible to develop an electro-hydraulic servo valve frequency characteristic test system with a microprocessor as the core to replace the traditional analog frequency characteristic tester. Contents of the invention [0003] The purpose of the pre...

Claims

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Application Information

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IPC IPC(8): G01R23/06
Inventor 李秀柏黄文梅
Owner 湖南睿创宇航科技有限公司
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