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

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

I. Overview

       WAW-100D 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 precision oil pump and electro-hydraulic servo valve, PC servo controller, to realize the multi-channel closed-loop control, to complete the test process of automatic control, automatic measurement, etc., with a good degree of 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.

Second, the basic structure and main functions

  1, the host: the configuration of the cylinder under the host frame, this structure greatly reduces the height of the host, transportation, easy installation, stable and reliable performance, the test bench lifting motor, chain, screw drive, to achieve the adjustment of the tensile space, the test is easy to operate;

  2, measurement and control system: by the electro-hydraulic servo oil source, all-digital PC servo controller, electro-hydraulic servo valves, pressure transducers, measurement of specimen deformation of the extensometer, measurement of the displacement of the photoelectric encoder, the test machine special PC measurement and control cards, printers, multifunctional 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), selected mature technology oil pump - motor, reliable quality, stable performance;

   3), the use of unique technology to develop and produce their own load-adaptive throttle speed control valve, system pressure stability, adaptive constant differential pressure flow regulation, no overflow energy consumption, easy to 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 control cabinet to achieve the effective separation of the strong unit and measurement and control of the weak unit, to ensure that the measurement and control system is not interfered with, long-term stability of work;

   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, all-digital PC servo control system:

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

   b) The system consists of three signal conditioning units (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 interfaces, software systems 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 displacement, rate of the cylinder, rate of strain, and so on, a variety of control modes It has various control modes such as equal-rate test force, equal-rate cylinder displacement, equal-rate strain, etc., and can realize smooth switching of control modes, which makes the system more flexible;

6, test machine special PC cardboard servo amplifier:

   a, for the pluggable PC card board, the application of advanced computer bus control technology designed for testing machines, program-controlled analog amplifiers, 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, to avoid 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, the Chinese language 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, and so on; and 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, the maximum tensile space: 550mm;

  5、Maximum compression space: 450mm;

  6, flat specimen clamping thickness: 0-15;

  7, round specimen clamping diameter: Φ4-Φ20;

  8, the maximum distance between the bending support: 400mm;

  9, column spacing: 460mm;

  10, piston displacement accuracy: ± 1% FS...;

  11, deformation measurement resolution: 0.001 mm;

  12, deformation measurement accuracy: ± 1%;

  13, Sensors: hydraulic sensor, photoelectric sensor, extensometer;

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

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

  16, host size: about 740mm × 580mm × 1890mm;

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

  18, host weight: about 2200kg;

  19, total power: 2.8kW.

Fourth, the main configuration list:

  1, hydraulic universal testing machine host a

  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