WAW-100C type microcomputer control electro-hydraulic servo universal testing machine

WAW-100C type microcomputer control electro-hydraulic servo universal testing machine

一、 Overview

       WAW-100C microcomputer control electro-hydraulic servo universal testing machine set electro-hydraulic servo automatic control, automatic measurement, data acquisition, screen display, test results processing as a whole, with the oil cylinder under the host as a platform, equipped with imported oil pumps and electro-hydraulic servo valves, PC computer servo controller, to realize the multi-channel closed-loop control, to complete the test process of automatic control, automatic measurement and other functions, with a good professionalism, It is characterized by good professionalism, high reliability, easy upgrading, etc., and can be constantly enriched and improved with the development of testing machine measurement and control technology and changes in testing standards.

二、Basic structure and main functions:

  1, host: the configuration of the cylinder lower host frame, this structure greatly reduces the height of the host, transportation, easy to install, stable and reliable performance. Worm gear structure of the host, the screw is fixed, the worm gear is installed in the moving beam, driven by the disk motor, through the rotation of the mother of silk to drive the moving beam up and down. The up and down centering stability is good, the test curve is smooth without steps, and the rigidity of the host is large.

  2, measurement and control system: by the electro-hydraulic servo oil source, all-digital PC servo controller, electro-hydraulic servo valves, pressure transducers, measuring the deformation of the test piece of the extensometer, measurement of the displacement of the photoelectric encoder, test machine special PC measurement and control cards, printers, multi-functional test software packages, electrical control units and other components;

  3, standard electro-hydraulic servo oil source:

   1) for load-adaptive oil inlet throttle speed control system, using mature technology according to the standard modular unit design and manufacturing, specifically for electro-hydraulic servo universal testing machine supporting the use;

   2) The oil pump-motor with mature technology is selected, with reliable quality and stable performance;

   3) Adopting the load-adaptive throttle speed control valve developed and produced by ourselves with unique technology, the system pressure is stable, adaptive constant differential pressure flow regulation, no overflow energy consumption, and easy to carry out PID closed-loop control;

   4) piping system: piping, fittings and their seals are selected from the stable performance of the group kit to ensure that the hydraulic system is sealed reliably, no oil leakage failure;

  4, electrical control cabinet:

    a, all the strong electrical components of the system is concentrated in the strong electrical control cabinet to achieve the effective separation of the strong power unit and measurement and control of the weak unit, to ensure that the measurement and control system is not interfered with, long-term stability;

    b, electronic control cabinet set up on the manual operation buttons, including power switch, emergency stop and oil source oil pump on and off;

5、Full digital PC servo control system:

    a, the system takes PC computer as the main body, all-digital PID regulation, with PC cardboard servo amplifier, measurement and control software and data acquisition and processing software, it can realize the closed-loop control of test force, specimen deformation, piston displacement and smooth switching of control mode;

    b, the system consists of three signal conditioning unit (test force unit, cylinder piston displacement unit, specimen deformation unit), control signal generator unit, servo valve drive unit, servo oil source control unit, the necessary I / O interface, software system and other components;

    c, the system's closed-loop control loop: measurement transducers (pressure transducers, displacement sensors, deformation of the extensometer) and servo valves, controllers (signal conditioning unit), servo amplifiers together to form a number of closed-loop control loop, to achieve the test machine, the test force, cylinder piston displacement, specimen deformation of the closed-loop control function; with the rate of the test force, rate of the cylinder displacement, rate of the strain and so on, a variety of control modes And can realize the smooth switching of control mode, so that the system has greater flexibility;

  6, the test machine dedicated PC cardboard servo amplifier:

    a, for the pluggable PC card board, the application of advanced computer bus control technology designed for the test machine, programmable analog amplifier, A/D conversion, digital acquisition channels, digital I / O, etc.;

    b, the special measurement and control card and PC to form a single card measurement and control system, can be directly connected to the sensor, measurement and control and data acquisition, so that the complex measurement and control and data acquisition system becomes simple and reliable;

    c, the use of computer bus technology, directly into the computer expansion slot, the full digital circuit, zero, gain adjustment, etc. are realized through the software, is the latest product unit of the test machine measurement and control technology development;

    d, gain programmable serial amplifier, can be obtained with different gain amplification;

    e, the sensor supply bridge power supply and A/D chip reference voltage share the same voltage, the entire measurement system year-on-year attenuation, the realization of the bridge power supply hardware compensation technology;

    f, through the multi-bit A/D conversion to meet the system's sensitivity and resolution requirements, avoiding the software frequency doubling method to reduce the characteristics of the system;

7, multi-functional test software package:

    a, operating system Windows98/XP/2000 platform, full Chinese operation interface;

    b, computer screen display test force, cylinder displacement, loading rate, deformation test data, drawing time - test force / deformation, deformation - test force and other test curves; automatic data processing, data processing methods to meet the requirements of GB228-2002 standards, such as the upper and lower yield point, the maximum force point, all types of provisions of the nonproportional stress points, all types of provisions of the full elongation of the stress point; at the same time to meet the test machine Pressure test requirements;

    c, the software also provides data analysis functions to meet the test personnel for test analysis and special test data processing.

    d, with strong graphical operation functions, such as dynamic test curves and digital display function, graphic zoom, intercept function, cursor following the display function;

    e, the use of VXDs high-speed data acquisition technology to achieve multi-channel (up to 16-way) high-speed data acquisition;

    f, the system has a complete file operation function for test curves, test data storage; at the same time, the test data can be stored in the form of ASCII code, in order to facilitate the user to carry out secondary data processing;

    g, with a single piece of test report output and batch test report output printing function;

  8, the control system has overload, over-setting, power failure, the piston reaches the limit position and other protection functions;

  9, hydraulic clamping oil source: independent low-noise hydraulic clamping oil source, control the chuck clamping and unclamping.

Third, the main technical indicators:

  1, the maximum test force: 100kN;

  2, test force measurement range: 2%-100% FS;

  3, the test force display value accuracy: display value accuracy ± 1%;

  4, deformation measurement device: the extensometer

  5, displacement measurement (mm): optical encoder, resolution 0.01;

  6, piston stroke (mm): 255;

  7、Maximum stretching space: 650mm;

  8、Maximum compression space: 550mm;

  9, flat specimen clamping thickness: 0-15;

  10, round specimen clamping diameter: Φ4-Φ20;

  11、Piston displacement accuracy: ±1%FS;

  12, deformation measurement resolution: 0.001 mm;

  13, deformation measurement accuracy: ± 1%;

  14, Sensors: oil pressure sensors, extensometer;

  15, control mode: electro-hydraulic servo closed-loop control, control mode can be smoothly switched;

  16, display mode: computer screen display test force, piston displacement, specimen deformation measurement value, screen display test curve, screen zero, calibration;

  17, host size: about 940mm × 630mm × 2010mm;

  18, control cabinet size: 1010mm × 650mm × 870mm;

  19, oil pump motor power: 2.2KW

  20, beam moving motor power: 0.75KW

Fourth, the main configuration list:

  1, hydraulic universal testing machine host

  2, hydraulic universal testing machine standard oil source a set of

  3, electro-hydraulic servo all-digital PC controller (including computers) a

  4, test machine special PC measurement and control card a piece of

  5, a printer

  6, electro-hydraulic servo valve a

  7、Electrical control box (and oil source integration) a set of

  8, a pressure sensor

  9, standard distance 50mm deformation of 10mm a lead meter

  10、Oil cylinder piston displacement sensor and a set of connectors

  11, a set of full digital servo control software

  12、Multi-functional test data processing software package (including tension and pressure common test software) a set of

  13、A set of pipeline

  14、Attachment (tensile, compression, bending and installation spare parts) A set of