Abstract:
A whole-vehicle-based method for evaluating extreme pressure and antiwear properties of grease includes injecting the grease onto a key bearing pin and causing the engineering machine to operate without load is disclosed. The method includes causing the engineering machine to operate under a load of 10% to 150% rated load at least once, viewing and analyzing a wear condition of a surface of the bearing pin, and issuing a whole-vehicle-based evaluation report of extreme pressure and antiwear properties of grease. The engineering machine is caused to operate once under a load of 10% to 150% rated load for 0.5 min to 100 h.
Abstract:
An abrasion testing apparatus with a base, a test platform, a pair of angle adjustment wheels disposed on opposite sides of the test platform, a drive wheel, a tension control wheel, and a plurality of idler wheels. The test surface can be raised or lowered and the pair of angle adjustment wheels can be moved toward or away from the test platform to change the angle of contact between a material on the test surface and a material being moved by the drive wheel. The tension control wheel is movable to control the tension of the moving material during the test. A method of testing abrasion resistance involves placing a first material on the test platform and threading a second material around the drive, idler, tension control, and angle adjustment wheels, and in contact with the first material and moving the second material against the first material.
Abstract:
The invention discloses a slope one-way loading rutting test device, wherein the upper part of a loading frame is slidably connected with an upper cross beam of a frame through a loading frame rotating assembly, and a variable speed motor and a runner wheel are embedded in the lower part of the loading frame. The variable speed motor is in transmission connection with the runner wheel to realize one-way continuous loading of the runner wheel on a test piece. The lower part of a bearing frame is slidably connected with a lower cross beam of a frame through a bearing frame rotating assembly, a test piece mounting frame and a height adjusting device are sequentially embedded into the upper part of the bearing frame from top to bottom, and the height of the test piece mounting frame is adjusted through the height adjusting device.
Abstract:
A method for automated parameter and selection testing based on known characteristics of the sample being tested. The method may utilize a software interface that proposes testing parameters based on the characteristics of the sample. The software interface may first guide the client through a series of questions or prompts, specifying the sample under test and may inquire information such as: the type of material, thickness, type of coating, and roughness level. The user may then decide what type of test to perform and the type of indenter from the list prescribed by executable instructions. In various embodiments, the method may, based on the indenter chosen, include a preliminary test to evaluate the depth versus load measurements or maximum load, so that the parameters may be adjusted for the primary test.
Abstract:
In one implementation, a footfall detection assembly comprising a sensor underlayment unit and a data analysis device is provided. The sensor underlayment unit comprises a sensor having a unique sensor identifier and a plurality of zones, wherein the sensor is configured to measure zone capacitance in of the plurality of zones, and a processing unit operably connected to the sensor. The processing unit is configured to receive the measured zone capacitance values from the sensor upon the occurrence of a change in measured zone capacitance of the sensor and generate and transmit a data packet comprising at least the unique sensor identifier and measured zone capacitance values upon occurrence of a change in capacitance of at least one of the plurality of zones of the sensor. The data analysis device is configured to receive the data packet, compare the measured zone capacitance values of the data packet to previously-measured zone capacitance values associated with the sensor underlayment into and generate a result therefrom.
Abstract:
In one implementation, a footfall detection assembly comprising a sensor underlayment unit and a data analysis device is provided. The sensor underlayment unit comprises a sensor having a unique sensor identifier and a plurality of zones, wherein the sensor is configured to measure zone capacitance in of the plurality of zones, and a processing unit operably connected to the sensor. The processing unit is configured to receive the measured zone capacitance values from the sensor upon the occurrence of a change in measured zone capacitance of the sensor and generate and transmit a data packet comprising at least the unique sensor identifier and measured zone capacitance values upon occurrence of a change in capacitance of at least one of the plurality of zones of the sensor. The data analysis device is configured to receive the data packet, compare the measured zone capacitance values of the data packet to previously-measured zone capacitance values associated with the sensor underlayment into and generate a result therefrom.
Abstract:
In one implementation, a footfall detection assembly comprising a sensor underlayment unit and a data analysis device is provided. The sensor underlayment unit comprises a sensor having a unique sensor identifier and a plurality of zones, wherein the sensor is configured to measure zone capacitance in of the plurality of zones, and a processing unit operably connected to the sensor. The processing unit is configured to receive the measured zone capacitance values from the sensor upon the occurrence of a change in measured zone capacitance of the sensor and generate and transmit a data packet comprising at least the unique sensor identifier and measured zone capacitance values upon occurrence of a change in capacitance of at least one of the plurality of zones of the sensor. The data analysis device is configured to receive the data packet, compare the measured zone capacitance values of the data packet to previously-measured zone capacitance values associated with the sensor underlayment into and generate a result therefrom.
Abstract:
A system for evaluating a rigidity of an angle bracket includes a test system having a first test fixture and a second test fixture. The system includes an angle bracket coupon including a first wall, a second wall coupled to the first wall at a bend to define an angle between the first wall and the second wall, and at least one three dimensional feature defined at the bend that extends between the first wall and the second wall. The angle bracket coupon is to be coupled to at least one of the first test fixture and the second test fixture to evaluate the rigidity of the angle bracket.
Abstract:
The invention relates to a device and method for detecting the grout compactness of splice sleeve, the device comprising a preloading member, a force transmission rod, a telescopic adjustment member, a vibration sensor and a data acquisition system. The rigid preloading member is used to fix the force transmission rod to the wall where the connecting structure of the splice sleeve is located, so that the end of the force transmission rod can be securely fastened to a rebar surface of a splice sleeve to be detected; the vibration sensor is fixed to the force transmission rod; the data acquisition system is used to acquire vibration signals from the vibration sensor. The grout compactness of splice sleeve is quantitatively analyzed, and a time-domain and frequency-domain signal may be used to obtain a peak-to-width ratio RNpw and a peak frequency ΩPeak signal to serve as a standard for the quantitative analysis.
Abstract:
A system for evaluating a rigidity of an angle bracket includes a test system having a first test fixture and a second test fixture. The system includes an angle bracket coupon including a first wall, a second wall coupled to the first wall at a bend to define an angle between the first wall and the second wall, and at least one three dimensional feature defined at the bend that extends between the first wall and the second wall. The angle bracket coupon is to be coupled to at least one of the first test fixture and the second test fixture to evaluate the rigidity of the angle bracket.