Design and implementation of 60MPa high-precision hydraulic calibration system

Fan Shangchun, Guan Ming*, Zheng Dezhi

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In the industrial production area, pressure is one of the important measuring parameters. To ensure the measurement accuracy of pressure sensors, it is necessary to carry out a regular calibration on them. In order to obtain the standard value of pressure accurately, rapidly and continuously, a high-precision hydraulic calibration system based on DSP and FPGA was designed. The pressure signal of hydraulic oil was real-time acquired by a high-precision piezoresistive pressure sensor, then the voltage outputted through the electrical bridge of the piezoresistive pressure sensor was converted to digital signal by 24-bit high-precision AD, after calculating the value of pressure, according to improved PID control algorithm designed for this hydraulic calibration system which realized incremental PID control, control output calculated by DSP was transmitted to FPGA to control the rotating speed of stepping motor to change the displacement of cylinder rod of helicoidal pump, thus the pressure fine regulating was realized. The control process curves real-time acquired by the system show, during testing process of 3 groups of calibration pressure ( 10MPa, 30MPa, 60MPa) , the system was competent for calibrating pressure within the set time ruled by calibration regulation, and steadied the pressure in ±0.02% accurate range.

Original languageEnglish
Title of host publicationICEMI 2009 - Proceedings of 9th International Conference on Electronic Measurement and Instruments
Pages1733-1738
Number of pages6
DOIs
Publication statusPublished - 2009
Externally publishedYes
Event9th International Conference on Electronic Measurement and Instruments, ICEMI 2009 - Beijing, China
Duration: 16 Aug 200919 Aug 2009

Publication series

NameICEMI 2009 - Proceedings of 9th International Conference on Electronic Measurement and Instruments

Conference

Conference9th International Conference on Electronic Measurement and Instruments, ICEMI 2009
Country/TerritoryChina
CityBeijing
Period16/08/0919/08/09

Keywords

  • Hydraulic equipment
  • PID algorithm
  • Pressure regulation

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