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EHC-3100 System for Electro-Hydraulic Servo Universal Testing Machine

EHC-3100 system servo universal testing machine
The system is composed of the independently developed EHC-3100 electro-hydraulic servo measurement and control box, GS-82A digital servo valve group and TestMaster 3.0 testing and control software.

Suitable for working together with the hydraulic universal testing machines from testing machine manufacturers, to compose the electro-hydraulic servo universal testing machines.

It is also suitable for the detection organizations to deal with the automatization upgrading and reconstruction of their old hydraulic testing machines and upgrade them to electro-hydraulic servo universal testing machines.
  • Our EHC-3100 system is able to implement load, displacement and deformation closed-loop control of the universal testing machine, and can achieve smoothly switching between the three control modes. It has the features of high control precision, strong adaptability, reliable long-term stability and so on.
  • The system can implement the whole control process from data acquisition, PID computing and Ethernet communication operation to the output control in a short period of time, thus achieve the accurate closed-loop control for the testing machine.
  • All three input channels use the separate 24-bit A/D converter for high-precision data sampling. The effective internal code is up to ± 200,000.
  • Has up to 15 linear compensation and correction function and greatly improve measurement range and measurement accuracy of the sensor.
  • The measurement unit adopts high precision pressure sensor, guyed displacement sensor and electronic extensometer.
  • The controller of EHC-3100 universal testing machine system uses Cotex_M3 32-bit high-speed ARM chip as the master chip, has high computing speed and data processing capabilities.
  • Has three analog input channels: One for loading, one for electronic extensometer and one extension channel.
  • Has three photoelectric encoder quadruple frequency counting input channels. One channel for guyed displacement sensor, two channels for photoelectric encoders or grating sensors.
  • Has 4 switch input interfaces: can be connected to 4 switches to input signal.
  • One digital servo valve interface: to connect GS-82 digital servo valve.
  • One electromagnetic reversing valve interface: to connect DC24V rapid return oil electromagnetic reversing valve.
  • One overload protection interface (normally closed contact): connect to the oil pump control circuit. Automatically stop oil pump when testing machine is overloaded.
  • Four switch output interfaces: can be connected to 4 intermediate relays.
  • Using the PID control strategy to achieve the load closed loop control , as well as achieving the functions of constant speed loading, load retention and constant speed offloading.
  • Using the PID control strategy to implement the displacement closed loop control , as well as achieving the functions of constant speed displacement and displacement holding.
  • Using the PID control strategy to implement the distortion closed loop control , as well as achieving the functions of constant speed distortion and deformation retaining.
  • The EHC-3100 system of universal testing machine has one 100MHz Ethernet communication interface, can achieve high-speed data communications with PC.
  • Has the function of real-time data acquisition upload and real-time delivery of control instructions, so as to achieve the purpose of controlling the testing machine by PC in real-time.
Product NameSpecificationAmount
Electro-Hydraulic Servo Measure and Control BoxEHC-31001 pc
Pressure Sensor30MPa1 pc
Guyed Displacement Sensor0-1000mm1 pc
Electronic Extensometer
YYU-10/50 (Optional)1 pc
Digital Servo ValveGS-891 pc
Plate Type Reducing ValveYB-1601 pc
Hydraulic Manifold Block DYWN-E (Optional)1 pc
Control Connecting CableEHC-31001 Set
Measure and Control SoftwareTestMaster 3.01 Set