When was the real three-axis testing machine made?

The true three-axis test machine was developed in the late 1970s and early 1980s.It is an instrument used to test the properties of soil and geotechnical engineering. It can perform compression, tensile and shear tests on the soil or rock under the condition of simulating actual engineering conditions. The true three-axis testing machine can provide accurate measurement and data collection, and can better understand and evaluate the behavior and nature of the soil, which is of great significance to ensure the safety and stability of the project. Many advanced technologies and methods have been adopted in the design and manufacture of the true three-axis testing machine. Among them, the most noteworthy is computer control technology and digital signal processing technology. The application of these technologies makes the true three-axis testing machine have higher accuracy, stability and reliability, and also makes data collection and processing easier and more convenient. In general, the research and development of the true three-axis testing machine is closely related to the continuous progress of modern science and technology.Its emergence not only provides a new method and technical means for soil and geotechnical testing, but also provides new ideas and methods for research in many other fields.