Test equipment is a tool and method for scientific researchers to conduct research. Due to the rapid development of information technology and computer technology, the hydraulic system, control system and data processing part of the test equipment manufactured at the end of the last century and the beginning of this century basically reached the update cycle. The mechanical part of the above equipment can still be used.
If the hydraulic system and control system of the above equipment are not updated, not only will there be a high failure rate during the use of the equipment, but it may also cause damage to the sample and affect the scientific research progress, increasing the scientific research cost. Directly scrapping the above equipment in the name of backward technology and high failure rate cannot be used, which will cause a lot of waste, making the mechanical part of the equipment composition that accounts for more than half of the cost of the normal working can no longer be used, which is not in line with modern construction The requirements of an economical society.
In the production practice, through communication and cooperative research and development with different users, Popwil has found the technical route to upgrade the old-generation MTS multi-channel loading system, domestic large-scale presses, etc., for Zhejiang University of Technology, Beijing University of Technology The MTS multi-channel loading system and large-scale structure test system built at the end of the last century and the beginning of this century in the School of Civil Engineering, Huaqiao University, and the School of Civil Engineering of Tongji University have undergone technical transformation, which has made the old equipment rejuvenated and received affirmation and praise from customers.
In addition, Popwil has used its own technical advantages to modernize the structure teaching test platform of the Hong Kong Polytechnic University and the 2400-ton large-scale rubber component compression and shear test machine of Doshin Rubber Engineering Co., Ltd. using computer electro-hydraulic servo control system. Accepted by the user and put into normal use.
The picture below is a photo of the teaching experiment system before the transformation of Hong Kong Polytechnic. It was loaded by manual jack.
Popwil has modernized it with a new generation of computer electro-hydraulic servo control system, making it a new generation of electro-hydraulic servo teaching test system that can complete the electro-hydraulic servo closed-loop control loading. The photos after the transformation are as follows:
Before the transformation of the 2400-ton large-scale rubber component compression-shear testing machine of Doshin Rubber Engineering Co., Ltd. in Malaysia, a PLC controller was used, and the vertical loading force could not be kept stable during the compression-shear test. The picture before the transformation is as follows:
After the transformation, a displacement measurement system and a horizontal shear servo actuator were added. The POP-M type electro-hydraulic servo multi-channel controller was used to control the test process, and the test requirements were perfectly completed.
The photos after the transformation are as follows:
The main technical parameters after the transformation are as follows:
- Maximum vertical test force: 24000kN;
- Vertical test force control mode: electro-hydraulic servo closed-loop control loading and load holding;
- Maintain accuracy of vertical test force: 2% of set value;
- Horizontal test force: +/- 500kN;
- Horizontal displacement: +/- 300mm;
- Actuator travel: +/- 500mm, rod end connecting disc is connected with sliding plate;
- Maximum piston speed: 600mm / s;
- Waveform: sine wave;
- Cycle: up to 10.
The control interface can provide "the curve of the horizontal loading speed and time" and "the hysteresis curve of the horizontal load and the horizontal displacement