Mesomechanics testing system and method integrating heating and observation
Provided are a mesomechanics testing system and method integrating heating and observation, relating to the field of rock mechanics testing. The system includes a control and collection module, a loading module, a vacuum module, and an observation module. The loading module and the observation module are both connected to the control and collection module; the loading module is configured to apply a load required by mechanics testing to a mesoscopic sample to be tested, and transmit mechanics testing data to the control and collection module; the vacuum module is configured to provide the mesoscopic sample with a vacuum space for real-time heating and mechanics testing; and the observation module is configured to collect image data of the mesoscopic sample during the mechanics testing, and transmit the image data to the control and collection module.
1. A mesomechanics testing system integrating heating and observation, comprising a control and collection module, a loading module, a vacuum module, and an observation module; wherein
the loading module and the observation module are both connected to the control and collection module;
the vacuum module is configured to provide a mesoscopic sample to be tested with a vacuum space for real-time heating and mechanics testing; the mesoscopic sample is a rock sample at mesoscopic scale; the mesoscopic scale indicates that a size of a portion to be tested of the sample is 0.1-10 mm; the vacuum module comprises a vacuum box;
the loading module is configured to apply a load required by the mechanics testing to the mesoscopic sample in the vacuum space, and transmit mechanics testing data to the control and collection module; and
the observation module is configured to collect image data of the mesoscopic sample during the mechanics testing, and transmit the image data to the control and collection module; wherein
the observation module comprises a stereoscopic microscope and a ring illuminator; the stereoscopic microscope is arranged above an observation window of the vacuum box; and a center of an objective lens of the stereoscopic microscope, a center of the observation window, and a center of the mesoscopic sample are on a straight line; and the ring illuminator is arranged at a periphery of a barrel of the objective lens of the stereoscopic microscope
the vacuum module further comprises a heating unit; the heating unit comprises a heater, a temperature controller, and a temperature display; the heater is arranged below the mesoscopic sample; the temperature controller is connected to the heater; and the temperature display is connected to the temperature controller; and
a thermal insulation ceramic chip is sandwiched between the mesoscopic sample and a fixture of a miniature tensile stage.
2. The system according to claim 1 , wherein the loading module comprises a miniature tensile stage and an automatic server;
the mesoscopic sample is arranged on a fixture of the miniature tensile stage; and
the automatic server is connected to the miniature tensile stage, is configured to receive a load instruction sent by the control and collection module and control the miniature tensile stage to apply a testing load to the mesoscopic sample, and is further configured to transmit, to the control and collection module, information collected by a load sensor and a displacement sensor that are provided on the miniature tensile stage.
3. The system according to claim 2 , wherein the vacuum module further comprises a mechanical pump and a molecular pump; the miniature tensile stage and the mesoscopic sample are both located in the vacuum box;
the mechanical pump and the molecular pump are both connected to the vacuum box;
the mechanical pump is configured to extract air from the vacuum box to reach a first vacuum degree state; and
the molecular pump is configured to extract the air from the vacuum box to reach a second vacuum degree state when the vacuum box is in the first vacuum degree state.
4. The system according to claim 3 , further comprising a vacuum measurement module, wherein the vacuum measurement module comprises a vacuum gauge and a vacuum degree display unit;
the vacuum gauge is configured to monitor operating parameters of the vacuum module; and
the vacuum degree display unit is configured to display monitored operating parameters of the vacuum module.
5. The system according to claim 1 , wherein the system further comprises a cooling module; the cooling module is configured to reduce a temperature around the heater; and the temperature around the heater is a temperature of a space other than regions in contact with the heater and the mesoscopic sample.
6. A mesomechanics testing method integrating heating and observation, wherein the method is implemented on the basis of the mesomechanics testing system integrating heating and observation according to claim 1 , and the method comprises:
providing, by a vacuum module, a mesoscopic sample to be tested with a vacuum space for real-time heating and mechanics testing;
when a vacuum degree in the vacuum space reaches a second vacuum degree state, heating the mesoscopic sample by using a heating unit in the vacuum module;
when a temperature of the mesoscopic sample reaches a target temperature, applying, by a loading module, a load required by the mechanics testing to the mesoscopic sample, and transmitting mechanics testing data to a control and collection module; and
collecting, by an observation module, image data of the mesoscopic sample during the mechanics testing, and transmitting the image data to a control and collection module.
7. The mesomechanics testing method integrating heating and observation according to claim 6 , wherein the loading module comprises a miniature tensile stage and an automatic server;
the mesoscopic sample is arranged on a fixture of the miniature tensile stage; and
the automatic server is connected to the miniature tensile stage, is configured to receive a load instruction sent by the control and collection module and control the miniature tensile stage to apply a testing load to the mesoscopic sample, and is further configured to transmit, to the control and collection module, information collected by a load sensor and a displacement sensor that are provided on the miniature tensile stage.
8. The mesomechanics testing method integrating heating and observation according to claim 7 , wherein the vacuum module further comprises a mechanical pump and a molecular pump; the miniature tensile stage and the mesoscopic sample are both located in the vacuum box;
the mechanical pump and the molecular pump are both connected to the vacuum box;
the mechanical pump is configured to extract air from the vacuum box to reach a first vacuum degree state; and
the molecular pump is configured to extract the air from the vacuum box to reach a second vacuum degree state when the vacuum box is in the first vacuum degree state.
9. The mesomechanics testing method integrating heating and observation according to claim 8 , further comprising a vacuum measurement module, wherein the vacuum measurement module comprises a vacuum gauge and a vacuum degree display unit;
the vacuum gauge is configured to monitor operating parameters of the vacuum module; and
the vacuum degree display unit is configured to display monitored operating parameters of the vacuum module.
10. The mesomechanics testing method integrating heating and observation according to claim 6 , wherein the system further comprises a cooling module; the cooling module is configured to reduce a temperature around the heater; and the temperature around the heater is a temperature of a space other than regions in contact with the heater and the mesoscopic sample.