Current status of measurement accuracy of universal testing machine

1. High-endUniversal testing machineand the development of metrological research
The research on the measurement of high-end advanced universal testing machines is constantly developing with the development of universal testing machines. At present, there are roughly the following directions in the research of universal testing machines:
(1) Big: In recent years, with the development of my country's aerospace industry, more and more large structural components such as missiles, rockets, etc. These will greatly promote the continuous expansion of universal testing machines in the direction of "big".
(2) Essence and small: In the fields of biomedical engineering, people need to evaluate the performance of many micro materials and components, and the accuracy of the usual universal material testing machine is difficult to achieve, which requires manufacturers to provide smaller and more sensitive universal material testing machine "fine" products.
(3) Environmental simulation: With the continuous development of industry, material testing has more and more environmental simulation requirements for extreme test conditions: ultra-high pressure, ultra-high temperature, ultra-low temperature, ultra-radiation, corrosion resistance, etc.
With the continuous advancement of universal testing machine technology, in order to ensure the accuracy of the transmission of high-end universal testing machine volume, metrological research work is also constantly developing:
(1) Automation research: Using the achievements of computer technology, various window calibration software are applied to various force standard machines, reducing manual operation and improving measurement speed;
(2) Dynamic mechanics and measurement research has been continuously deepened: certain achievements have been achieved in studying the generation mechanism of dynamic forces and signal acquisition;
(3) Research on extreme force: Nowadays, a force standard machine with a high force value of more than 1MN has appeared, and it is still developing a larger force value. At the same time, a small force standard machine with a small force value of less than 1N or even smaller is also under development.
2. Research on factors influencing error of universal testing machine
In terms of factors,Electronic universal testing machineIt is not exactly the same as the hydraulic pendulum universal test machine.
For electronic universal testing machines, its influencing factors are mainly two aspects: one is the mechanical system (such as the shape, process, etc.), and the other is the measurement and control technology. The research on measurement and control technology of universal material testing machines in my country is far from that of advanced foreign countries. Most key components and technologies of universal material testing machines, such as extensometers, servo valves, force sensors, controllers, etc., are introduced from abroad.
In foreign countries, electronic universal material testing machines have basically replaced hydraulic pendulum universal material testing machines, so in recent years, there are few researches on hydraulic pendulum universal material testing machines.http://www.hssdtest.com/