Agricultural systems have increased in complexity to allow farmers to control the environmental factors impacting a crop. By analyzing data from a plurality, and preferably a large number, of operations, a particular objective for a particular plan may be developed for a particular crop. The equipment at a particular site may then monitor the crop and be controlled by a device, such as an on-site hub, to operate equipment in a manner associated with the particular plan and objective.

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.

In a material testing machine including a load actuator including a shaft configured to make a linear motion, and configured to apply a load to a test piece through the linear motion of the shaft, the load actuator includes a bearing configured to support the shaft, and the bearing serves as an air bearing.

A modular test fixture is configured to quickly support test samples of different configurations for testing.

A tension testing apparatus and system is disclosed in which the tension testing apparatus includes a first box including a first outer plate and a first inner plate, a second box including a second outer plate and a second inner plate, and a test sample holding system coupled to the first inner plate and the second inner plate. The first outer plate and the first inner plate may be coupled together by at least two rods. The second outer plate and the second inner plate may be coupled together by at least two other rods. The test sample holding system may be configured to hold a test sample. The at least two rods of the first box may be configured to pass through the second inner plate. The at least two rods of the second box may be configured to pass through the first inner plate.

Safety systems and material testing systems including safety systems are disclosed. An example material testing system includes: an actuator configured to control an operator-accessible component of the material testing system; an actuator disabling circuit configured to disable the actuator; and one or more processors configured to: control the actuator based on a material testing process; monitor a plurality of inputs associated with operation of the material testing system; determine, based on the plurality of inputs and the material testing process, a state of the material testing system from a plurality of predetermined states, the predetermined states comprising one or more unrestricted states and one or more restricted states; and control the actuator disabling circuit based on the determined state.

An example material testing system includes: a crosshead configured to be actuated to transfer testing force to a test specimen during a material test; an actuator configured to actuate the crosshead and to apply the testing force to the crosshead; a force sensor configured to measure force applied by the crosshead to the specimen; and a control processor configured to: determine a reference force range based on a first force measurement from the force sensor in response to initiation of movement of the crosshead; and in response to a second force measurement by the force sensor that is outside of the reference force range, controlling the actuator to apply a braking force to the crosshead.

A material analysis device for analysing a material sample. The material analysis device is equipped with a—generally temperature-controllable—sample chamber and a sample holder, which, supported by at least one pillar, protrudes into the sample chamber, and a loading shaft, to one end of which force is applied by an exciter, and the other end of which bears a connecting member, with which it transmits force to the sample in a defined manner and loads same thereby.

A test system includes subsystems for application to a test sample of a range of conditions that might be encountered in an actual application. Conditions may include the presence of particular fluid environments, temperatures, pressures, and mechanical loads including tensile and bending loads. The system is particularly suited for elongated samples such as tubular products used in oil and gas applications, though a range of samples may be tested.

The present invention relates to a device for measuring residual stress and hardness. Residual stress remaining in a metallic material due to deformation, thermal stress, or the like is a cause of various problems including degradation of mechanical properties such as fatigue strength and fracture properties and difficulty in post-processing. It is very difficult to derive a calibration curve when measuring stress by an existing non-destructive Barkhausen noise measurement method. When cross points of Barkhausen noise measurements for three or more stresses are not at one position, calibrated curves can be easily found by scaling the Barkhausen noise measurements by using calibration equations of the present invention to collect the cross points at a unique position, thereby providing a practical method of easily measuring stress of a metal by a Barkhausen noise measurement method. Therefore, according to the present invention, it is found that the internal microstructure and surface residual stress of a metal cause crossing points not to be at a unique position in a conventional Barkhausen noise measurement experiment. In addition, basic physical properties and surface residual stress of a metallic material may be measured using the above-mentioned physical feature.