Micro control device for simulating electric thermal field change of plate/strip

A micro control device for simulating electric thermal field change of a plate/strip, wherein the micro control device comprising a plate shape simulating test platform, a high current regulating power supply, a current regulating device, a thermal imager, a thermocouple, a non-contact type full field strain gauge, a high-power current control device and an electro-plastic control system;

• the plate shape simulating test platform comprising a test platform steel plate, a movable supporting beam, a plate/strip specimen, a conductive clamp, a slipknot screw, a tension sensor and a servo electric cylinder;
• the test platform steel plate is used to provide support for the movable supporting beam, the plate/strip specimen, the conductive clamp, the slipknot screw, the tension sensor and the servo electric cylinder;
• the movable supporting beam is fixedly connected to two ends of the test platform steel plate, which is a force bearing device;
• the movable supporting beam is fixed on the test platform steel plate according to size specification of a specimen, and is drilled along a lateral direction;
• a longitudinal distance of the movable supporting beam is stepless or multistage adjustable;
• a first end of the conductive clamp is clamped at a lateral punching position of the plate/strip specimen, a first end of the tension sensor is connected to a second end of the conductive clamp through the slipknot screw, and a second end of the tension sensor is connected to the servo electric cylinder;
• the servo electric cylinder and the tension sensor can be adjusted or measured separately to change lateral local field distribution of the plate/strip;
• the high current regulating power supply provides a current for the plate/strip specimen, and the current is a DC pulse;
• the current regulating device comprising a plurality of high-power current control devices which is installed between the high current regulating power supply and the conductive clamp to realize the respective regulation of current flowing through the two ends of the specimen;
• and the parameters of the current are synchronously transmitted to the electro-plastic control system;
• the high-power current control device comprising a servo motor, an insulating push rod, a conductive clamp connecting end, a high current copper pole slider, a copper wire, an insulating bracket and a power supply connecting end;
• the copper wire is wound on the insulating bracket;
• the surface of the copper wire is insulated;
• the power supply connecting end is connected to a positive electrode of the high current regulating power supply, and the conductive clamp connecting end is connected to the conductive clamp;
• and the servo motor controlled by the electro-plastic control system drives the high current copper pole slider to change length of the copper wire connected to a circuit to change resistance and gradually change a current value in the circuit;
• the electro-plastic control system sets off-line and fine-tunes the electrical pulse parameters and the currents of each path according to the initial temperature and tension distribution conditions of the plate/strip, and obtains temperature and tension distribution conditions close to the control target;
• the thermal imager is arranged above the test platform for measuring a thermal field of the tested plate/strip, meanwhile the thermal imager is calibrated by a thermocouple embedded on a surface of the plate/strip specimen;
• the non-contact type full field strain gauge is arranged above the test platform steel plate with a lens direction of which is perpendicular to an upper surface of the plate/strip specimen, for carrying out a full field strain measurement of the plate/strip specimen;
• data of current field, thermal field and stress field obtained in real time by the thermal imager, the non-contact type full field strain gauge and the tension sensor are transmitted to the electro-plastic control system.