The present invention is a system for measuring at least one property of concrete that comprises: a housing having an inner cavity, said housing being embeddable into concrete upon deployment of said system in the field; a controller having a form that fits inside said cavity, said controller being retrievable from said cavity after said system is deployed; a sensor detachably connected to the controller such that the sensor becomes embedded into concrete upon said deployment of said system; wherein said system is capable of measuring a property of concrete upon deployment. The present invention also provides a novel method of measuring the strength of concrete comprising attaching the system as described above to a supporting element of a construction structure; immersing said housing and said sensor into concrete whereby the sensor is completely embedded inside the concrete; and measuring data related to the strength of concrete using the sensor and then transmitting the data wirelessly to a remote server.

The present invention is a system for measuring at least one property of concrete that comprises: a housing having an inner cavity, said housing being embeddable into concrete upon deployment of said system in the field; a controller having a form that fits inside said cavity, said controller being retrievable from said cavity after said system is deployed; a sensor detachably connected to the controller such that the sensor becomes embedded into concrete upon said deployment of said system; wherein said system is capable of measuring a property of concrete upon deployment. The present invention also provides a novel method of measuring the strength of concrete comprising attaching the system as described above to a supporting element of a construction structure; immersing said housing and said sensor into concrete whereby the sensor is completely embedded inside the concrete; and measuring data related to the strength of concrete using the sensor and then transmitting the data wirelessly to a remote server.

A bond test apparatus includes a test tool, a stage for mounting a bond for testing, and a drive mechanism comprising a voice coil. The voice coil is coupled to either the stage or to the test tool and is configured to provide relative movement between the stage and the test tool such that the bond applies a test force to the test tool. The bond test apparatus can also include a velocity sensor configured to sense an instantaneous relative velocity between the stage and the test tool, and a controller configured to control the drive mechanism in response to a signal from the velocity sensor. The bond test apparatus can also include a retarding mechanism coupled to the stage or the test tool and configured to apply, in response to relative movement between the stage and the test tool, a retarding force opposing the driving force.

An example material testing machine includes: a first crosshead; a first drive shaft configured to move the first crosshead when actuated; a housing comprising an air inlet and an air outlet; a drive motor within the housing and configured to actuate the first drive shaft; a motor drive circuit configured to provide electrical power to the drive motor; and a motor drive cooling system configured to cool the motor drive circuit, the motor drive cooling system comprising: a cooling fan configured to generate an airflow from the air inlet of the housing to the air outlet of the housing, wherein a total surface area of the air outlet is greater than a total surface area of the air inlet such that an air pressure of the airflow decreases from the air inlet towards the air outlet; a duct configured to direct a path of the airflow between the air inlet and the air outlet; and a heat sink thermally coupled to the motor drive circuit and positioned within the airflow in the duct.

An example material testing machine includes: a first crosshead; a first drive shaft configured to move the first crosshead when actuated; a housing comprising an air inlet and an air outlet; a drive motor within the housing and configured to actuate the first drive shaft; a motor drive circuit configured to provide electrical power to the drive motor; and a motor drive cooling system configured to cool the motor drive circuit, the motor drive cooling system comprising: a cooling fan configured to generate an airflow from the air inlet of the housing to the air outlet of the housing, wherein a total surface area of the air outlet is greater than a total surface area of the air inlet such that an air pressure of the airflow decreases from the air inlet towards the air outlet; a duct configured to direct a path of the airflow between the air inlet and the air outlet; and a heat sink thermally coupled to the motor drive circuit and positioned within the airflow in the duct.

A computer-implemented method includes receiving, in computer memory, a first test data set that comprises results of a real-world test of a material, where the first test data set comprises a plurality of test data points. The method further includes identifying one or more critical points among the test data points in the first test data set and processing the first test data set with a computer processor to produce a second test data set with differing (e.g., fewer) test data points than the first test data set, wherein the second test data set includes all the test data points that were identified as critical points in the first test data set and at least some other data points.

A state quantity acquisition unit acquires a state quantity of a target apparatus including a temperature of the target apparatus. A load specification unit specifies a load history of the target apparatus, based on the state quantity. A remaining life calculation unit calculates a parameter related to a remaining life of the target apparatus for each of a plurality of degradation types, based on the load history specified by the load specification unit.

A state quantity acquisition unit acquires a state quantity of a target apparatus including a temperature of the target apparatus. A load specification unit specifies a load history of the target apparatus, based on the state quantity. A remaining life calculation unit calculates a parameter related to a remaining life of the target apparatus for each of a plurality of degradation types, based on the load history specified by the load specification unit.

Disclosed is a device for testing corrosion fatigue resistance on the basis of acoustic emission. The device includes: a main machine including a supporting frame and a tensile mechanism arranged on the supporting frame; a clamping mechanism including a first clamp and a second clamp that is arranged opposite the first clamp, where the first clamp and the second clamp are both connected to the tensile mechanism, the tensile mechanism is used for driving the first clamp and the second clamp to move close to or away from each other, the first clamp is provided with an accommodation cavity for accommodating a corrosive substance, the accommodation cavity is provided with an opening that is provided on the first clamp and close to one end of the second clamp, and the first clamp can place a test specimen in the accommodation cavity when fixing the test specimen.

Disclosed is a device for testing corrosion fatigue resistance on the basis of acoustic emission. The device includes: a main machine including a supporting frame and a tensile mechanism arranged on the supporting frame; a clamping mechanism including a first clamp and a second clamp that is arranged opposite the first clamp, where the first clamp and the second clamp are both connected to the tensile mechanism, the tensile mechanism is used for driving the first clamp and the second clamp to move close to or away from each other, the first clamp is provided with an accommodation cavity for accommodating a corrosive substance, the accommodation cavity is provided with an opening that is provided on the first clamp and close to one end of the second clamp, and the first clamp can place a test specimen in the accommodation cavity when fixing the test specimen.