EHC-1500 System for Electro-Hydraulic Servo Pressure Testing Machine

EHC-1500 system electro hydraulic servo pressure testing machine

The EHC-1500 system for electro-hydraulic servo pressure testing machine is composed of our independently developed measure and control box, GS-82A digital servo valve group and SuperTest V9.0 testing and control software.

The system is suitable for working together with the the electro-hydraulic pressure testing machines from testing machine manufacturers, to compose the electro-hydraulic servo pressure testing machines.

It is also suitable for the detection organizations to deal with the automatization upgrading and reconstruction of their old 300kN-3000kN pressure testing machines and upgrade them to electro-hydraulic servo pressure testing machines.

EHC-1500 System for Electro-Hydraulic Servo Pressure Testing Machine Product Information 80.46 KB

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Advantages & Features
Technical Overview
Control Functions & Interfaces

Our EHC-1500 system is able to implement load closed-loop and displacement close-loop control for the pressure testing machine. It has the features of high control precision, strong adaptability, 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.
The input channel adopts the separate 24-bit A/D converter for high-precision data sampling. The effective internal code is up to ± 200000.
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 and guyed displacement sensor.

The controller uses Cotex_M3 32-bit high-speed ARM chip as the master chip, has high computing speed and data processing capabilities.
Has one input channel for pressure sensor or load sensor.
Has one photoelectric encoder quadruple frequency counting input channel: to connect one guyed displacement sensor.
One digital servo valve interface: to connect GS-82 digital servo valve.
One electromagnetic reversing valve interface: to connect DC24V rapid return oil electromagnetic valve.
One overload protection interface (normally closed contact): connect to the oil pump control circuit. Automatically stop oil pump when testing machine is overloaded.

The system uses 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. Loading speed can be configured freely.
It uses the PID control strategy to implement the displacement closed loop control , as well as achieving the functions of constant speed displacement and displacement holding. The speed of displacement can be configured freely.
One 100MHz Ethernet communication interface, 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.
One manual control box interface, can be connected to the manual control box to start and stop the test.

Configuration List

Product Name	Specification	Amount
Electro-Hydraulic Servo Pressure Measure and Control Box	EHC-1500	1 pc
Pressure Sensor	30MPa	1 pc
Guyed Displacement Sensor	1000mm	1 pc
Digital Servo Valve	GS-82A	1 pc
Reducing Valve	YG-161	1 pc
Control Connecting Cable	EHC-1500	1 Set
Measure and Control Software	SuperTest V9.0	1 Set