Design of Testing Device for Mechanical Property Testing System of Tai Lake Shield

According to the requirements of testing the mechanical properties of water s hield from Tai Lake the corresponding testing system was designed by adopting the id ea of open structure. The test system includes the detection device, the upper computer operation unit and the connected control unit. The testing device adopts a vertical fram e suitable for testing materials in water, USES a stepper motor to drive the lead screw t o achieve the basic tensile movement, and can achieve other testing functions through the addition of shear, friction and other expansion modules. The upper computer USES Kingview7.5 to develop the test interface corresponding to each test function, which c an carry out manual debugging and automatic test operations, and input the measurem ent data and process parameters into the MySQL database to provide real-time display and historical query functions. The main controller is realized by Arduino Mega2560 c ircuit board, which communicates with the HX711 conversion module through the sin gle bus protocol to collect the stress data of materials. By monitoring the running proc ess of stepping motor, the material deformation data is calculated. Through communic ation with Modbus RTU protocol of upper computer, operation command and test data transmission are realized.