Abstract: The disclosed technology provides solutions for measuring seal characteristics and in particular, for precisely measuring frictional characteristics of a rotary seal. In some aspects, a seal testing apparatus of the disclosed technology can include a motor coupled to a proximal end of a shaft, a rotator coupled to a distal end of the shaft, and a housing disposed around an exterior surface of the rotator, wherein the housing is configured to removably receive at least one seal. In some aspects the seal-testing apparatus can further include a torque transducer coupled to the shaft, wherein the torque transducer is configured to measure a torque output of the motor.

Abstract: In various aspects, a method of detecting surface irregularities on or in an internal surface of a cylinder for use in a piston-cylinder assembly is disclosed. The method can include (A) fixing a position of and an orientation of a first one of the cylinder and a piston; (B) configuring a positioner and a dynamometer to move a dynamometer and a second one of the cylinder and the piston along a common longitudinal axis, the dynamometer being mechanically coupled to the second one; (C) moving the second one relative to the first one along the common longitudinal axis between a first position and a second position, the piston being located inside the cylinder at the first position and at the second position; and (D) measuring, by the dynamometer, a frictional force between the piston and the cylinder during the movement.

Abstract: Assembly comprising a vehicle (13, 13a-c) having a plurality of wheels (2), each of the wheels (2) arranged to support a weight of the vehicle (13) against an underlying surface (5); a sensor (10) operable to measure a force between one of the wheels (2) and a body of the vehicle (13, 13a-c); and a processor (15) configured to receive measurement data from the sensor (10). There is also provided a method for measuring conditions of a drive surface (5) and a method of operating vehicles (13, 13a-d) on a road (5).

Abstract: An apparatus and method for controlling a drilling system in a manner that reduces stick-slip by receiving a desired rotation speed v0 of the drive system to rotate the drillstring, receiving property measurements of the drilling system, and deriving therefrom a rotation speed vup of upgoing rotational waves of the drillstring associated with upgoing rotational energy in the drillstring. An actual rotation speed v of the drive system to rotate the drillstring is determined by representing energy in the drillstring as a mathematical expression containing a sum of rotational energy produced by the drive system and downgoing rotational energy caused by the upgoing rotational waves that are reflected downwardly at an upper end of the drillstring, and then optimizing the mathematical expression, which is then used for controlling the drive system to rotate the drillstring at v.

Abstract: In various embodiments, a method of providing a hair treatment agent is provided. The method can have a detecting of at least one sensor value on hair of a user by employing at least one portable sensor, a determining of a hair condition of the user by employing the detected at least one sensor value, a computer-assisted determining of a user-specific hair treatment agent including the determined hair condition, and a preparing of the determined user-specific hair treatment agent by employing a hair treatment agent mixing device.

Abstract: Methods, systems and devices for mobile detection of soil compaction and soil characteristic data are provided. Operations include causing a subsurface portion of soil at a compaction detection location to be disrupted using compressed air, generating disruption data corresponding to the disruption of the subsurface portion of the soil at the compaction detection location, generating geographic location data corresponding to the compaction detection location, receiving the geographic location data from the location device and the disruption data from the disruption sensor and associating the geographic location data with the disruption data.

Abstract: An apparatus and a method can accurately estimate and determine a friction coefficient of a brake friction material in real time taking into consideration current driving conditions of a vehicle. The apparatus includes a model generation device configured to generate a friction coefficient meta model to determine the friction coefficient based on information of an operation state of a brake using raw data acquired through a preceding test evaluation process.

Abstract: A distributed computing system for determining road surface traction capacity for roadways located in a common spatio-temporal zone includes a plurality of vehicles that each include a plurality of sensors and systems that collect and analyze a plurality of parameters related to road surface conditions in the common spatio-temporal zone. The distributed computing system also includes one or more central computers in wireless communication with each of the plurality of vehicles. The one or more central computers execute instructions to determine a road surface traction capacity value for the common spatio-temporal zone.

Abstract: In one embodiment, a tribometer comprises: an infrared (IR) transparent and optically transparent disk coupled to a platform, the disk having an observation side disk surface on an observation side of the disk and a contact side disk surface on a contact side of the disk; a motor coupled to the disk to rotate the disk around a rotational axis of the disk; a pivot support coupled to the platform; a pivoting member connected to the pivot support to pivot along a pivot plane; a sample holder configured to hold a sample and be coupled with the pivoting member to place the sample in contact with the contact side disk surface of the disk; and an IR camera and an optical microscope disposed on the observation side of the disk to observe the sample in sliding contact with the contact side disk surface of the disk driven in rotation.

Abstract: A rotational device provides rotation of a location of interest about a rotational axis and includes first and second sockets each having three contact points distributed about the rotational axis. The contact points of each socket may be on convex surfaces and a spindle assembly is held between the sockets, which face each other along the rotational axis. The spindle assembly has a first convex surface centered about the rotational axis that contacts the contact points of the first socket, and a second convex surface that contacts the contact points of the second socket. The spindle assembly also has a drive shaft aligned with the rotational axis. Linear stages may be used to provide adjustment in one or more mutually perpendicular directions. An alternative embodiment uses a spindle assembly with two curved contact surfaces that contact respective curved surfaces that are adjacent to the rotational axis rather than aligned therewith.

Abstract: A footprint generator capable of applying a constant force includes: a base plate in which a target surface may be on an upper surface of the base plate; a shoe mounting member that is apart from the upper surface of the base plate and capable of mounting a shoe; a driving unit that is apart from the upper surface of the base plate and capable of moving the shoe mounting member up and down; and a force measuring unit configured to measure an impact force when the shoe mounting member descends and contacts the shoe with the target surface to generate a footprint on the target surface.

Abstract: A method for building and using soil models that determine soil properties from soil spectrum data is provided. In an embodiment, building soil model may be accomplished using soil spectrum data received via hyperspectral sensors from a land unit. A processor updates the soil spectrum data by removing interference signals from the soil spectrum data. Multiple ground sampling locations within the land unit are then determined based on the updated soil spectrum data. Soil property data are obtained from ground sampling at the ground sampling locations. Soil models that correlate the updated soil spectrum data with the soil property data are created based on the updated soil spectrum data and the soil property data. The soil models are sent to a storage for future use.

Abstract: An apparatus for testing a razor blade comprises a base, a material support table, a material sample, a transport carriage, a blade retention assembly, and a razor blade. The material support table is supported by the base. The transport carriage is movably coupled with the base and is movable with respect to the material support table between a start position and an end position. The blade retention assembly is movably coupled with the transport carriage and is movable with respect to the material support table between a blade-engaged position and a blade disengaged position. The blade retention assembly is movable together with the transport carriage between the start position and the end position. The blade is releasably attached to the blade retention assembly. The razor blade contacts the material sample when the blade retention assembly is in the blade-engaged position. Methods are also provided.

Abstract: A pin-on-plate friction and wear test device includes a high temperature heating chamber and a cooling pin. The high temperature heating chamber is fastened horizontally to the mobile base. The axis of the cooling pin is perpendicular to the upper surface of the mobile base. The electric resistance heating plate is located in the bottom closed space under the friction sample plate in the high temperature heating chamber. The electric resistance heats the fixed sample to experiment temperature. The inner layout of pin is a circling cooling channel where the cooling medium adjusts and cools the temperature of the sample. Thermocouples are separately distributed in the temperature measuring groove of the high temperature heating chamber and the temperature measuring hole of the cooling pin for real-time temperature measurement. The device can simulate the friction and wear properties of the high-strength steel plate and hot-stamping die in the differential temperature environment.

Abstract: A rolling bearing test includes: a hermetic container configured to allow atmosphere gas to be introduced therein; a rotary shaft housed in the hermetic container and fitted into the rolling bearing; a pair of shaft support portions fixed to a fixing portion provided in the hermetic container and configured to rotatably support the rotary shaft at both sides of the rolling bearing in an axial direction, respectively; a drive device configured to drive the rotary shaft; a holding portion configured to hold the outer ring of the rolling bearing to avoid rotation of the outer ring; a first load application mechanism configured to apply an axial load between the inner ring and the outer ring of the rolling bearing; and a second load application mechanism.

Abstract: Various machines, systems, and methods for generating calibration data for a sensorized brake pad are disclosed. In some embodiments, a system includes a fixture, a brake pad retainer, a pressure plate, an actuator and a controller. The actuator applies a pressure to the sensorized brake pad and signals from the pressure sensors are received. Calibration data is generated based on the signals received from the pressures sensors when the pressure is applied to the sensorized brake pad.

Abstract: A system including a pneumatic actuator having an actuator element, the system further including a compressed-air provision device which is configured to carry out a closed-loop position control of the actuator element by applying compressed air to the pneumatic actuator. The compressed-air provision device is further configured to carry out an assistance procedure in which the actuator element is set in an oscillation movement, pressure values and position values are detected, and, on the basis of the detected pressure values and the detected position values, friction information and/or mass information is determined and/or verified.

Abstract: A method of analyzing soil using a modular sensor device. The modular sensor device including a sensor bus head, a sensor bus terminus, and a sensor rod in a stacked arrangement. The sensor rod disposed between the sensor bus head and the sensor bus terminus. The method including setting on an output pin of the sensor bus. The method further including, subsequent to setting the output pin of the sensor bus, detecting a transition on an input pin of the sensor rod, the output pin of the sensor bus and the input pin of the sensor rod being part of a daisy chain. The method further including, in response to detecting the transition at the input pin of the sensor rod, enabling bidirectional communication between the sensor rod and the sensor bus head over a communication bus electrically coupling the sensor bus head to the sensor rod.

Abstract: A seal testing system includes a drive system and a rotating shaft driven by the drive system. The system further includes a first seal testing subassembly including a first rotating member coupled to the rotating shaft, a first stationary member located adjacent the first rotating member, and a first test seal disposed between the rotating member and the stationary member at a first seal interface; and a second seal testing subassembly including a second rotating member coupled to the rotating shaft, a second stationary member located adjacent the second rotating member, and a second test seal disposed between the rotating member and the stationary member at a second seal interface. The system additionally includes a misalignment assembly coupled to the first and second stationary members to move the first and second stationary members the same distance to provide an equal misalignment at the first and second seal interface.

Abstract: Detecting a breakover event during a friction test includes obtaining a hookload measurement for each of a series of time windows and generating a linear model and a nonlinear model from the plurality of hookload measurements. During run time, from the nonlinear model, an inflection point is identified from the nonlinear model, where the inflection point is determined to have occurred at a particular time window. A hookload value associated with the linear model, and a hookload value associated with the nonlinear model is determined for the particular time window. A breakover event is determined to have occurred at the particular time when the hookload value associated with the linear model at the particular time window exceeds the hookload value associated with the nonlinear model at the particular time window.

Abstract: The method for organizing a group of several separate vehicles in a platoon includes an identification step (a) in order to identify the candidate vehicles that are to form the platoonp The method also includes an acquisition step (b) in order to acquire, for each candidate vehicle, at least one parameter associated with a tire of the candidate vehicle, such as the wet grip index of the tire tyre, referred to as the “tire parameter”. Subsequently, based on the tire parameter, a processing step (c) for determining the rank attributed to the particular candidate vehicle in the platoon and/or the inter-vehicle distance which, at a given speed, must separate the candidate vehicle in question from the vehicle immediately in front in the platoon.

Abstract: A frictional force monitoring system for middle troughs of a scraper conveyor, comprising a scraper conveyor system and a sensing detection system. The scraper conveyor system consists of a machine body, middle troughs, thrust lugs, scrapers, a double chain, a sprocket, a speed reducer, an electric motor and a frequency converter. The sensing monitoring system consists of force receiving modules, a three-dimensional force sensor, and a pre-embedded temperature sensor. The frictional force monitoring system is able to monitor impact loads, frictional forces, friction coefficients, temperature, etc. between an annular chain, coal bulk, and middle troughs of the scraper conveyor under complex and severe operating conditions, and to provide the technical means for the design, safety early-warning and health evaluation of the scraper conveyor, and can provide a data basis for studying friction wear and fatigue breaking mechanism of middle troughs of a scraper machine.

Abstract: The invention disclosed a friction coefficient measuring device under the condition of material periodic deformation. The measuring device is mainly composed of a torque sensor, a sleeve system, an upper sample, a lower sample, a flexible fixture, an air bearing, a clamping system, a tension-compression sensor, a support rod, and a support table. A working module of a friction-wear testing machine is connected with the torque sensor and then connected with the sleeve system to fix the upper sample. A rotating module of the friction-wear testing machine is used for connecting the flexible fixture to fix the lower sample. The tension-compression sensor can accurately measure the radial force between the upper sample and the lower sample. The torque sensor can measure the load torque values of the upper sample and lower sample during testing.

Abstract: A wear detection method and system for a linear actuator such as a pneumatic cylinder, a hydraulic cylinder, an electric cylinder or the like. A physical amount detection sensor 9 is mounted on a linear actuator in which a push-pull member connected to a rod 2 pushes and pulls a pressure-receiving object while applying a lateral load in a direction different from the linear movement direction. An external force that is generated between a tube and the mounting member when the pressure-receiving object is pushed and pulled is detected by the physical amount detection sensor 9 and compared with standard external force data, which was detected in a state without abnormalities and stored in a computation/storage/determination processing device 10, to computationally determine whether the linear actuator is in a normal state or an abnormal state.

Abstract: A testing platform with a floating cylinder for high-pressure and high-speed reciprocating sealing experiment, characterized in that, includes a frame, a cylinder body for testing and a high-speed driving device, the frame comprises a horizontal rolling guide rail (9), the cylinder body for testing comprises a cylinder, the cylinder is floatingly mounted on the rolling guide rail and is mounted to the frame through a tension-compression sensor which is in the same direction as the rolling guide rail, the cylinder is cylindrical as a whole, has a cavity in a middle and openings on two sides with a diameter slightly greater than a diameter of a test rod, the cylinder includes a left end cover affixed on a left side, a right end cover affixed on a right side, a left seal between the left end cover and the cylinder, a right seal between the right end cover and the cylinder, the piston rod penetrates into the cylinder horizontally and passes through the left end cover, the left seal, the right seal and the right e

Abstract: A tire (100) rolls on a surface (105). A method (600) for providing maximum traction coefficient between the tire (100) and the surface (105) include steps for detecting a momentary slip of the tire (100) on the surface (105); detecting a momentary traction coefficient; forming a tuple (410, 510) from the slip and the current traction coefficient; choosing a characteristic curve (205, 305) from a number of predetermined characteristic curves (205, 305) on the basis of the tuple (410, 510), whereby each characteristic curve (205, 305) describes a traction behavior of the tire (100) or a corresponding characteristic pitch; determining the maximum traction coefficient on the basis of the selected characteristic curves (205, 305); and thus providing the maximum traction coefficient.

Abstract: Various machines, systems, and methods for generating calibration data for a sensorized brake pad are disclosed. In some embodiments, a system includes a fixture, a brake pad retainer, a pressure plate, an actuator and a controller. The actuator applies a pressure to the sensorized brake pad and signals from the pressure sensors are received. Calibration data is generated based on the signals received from the pressures sensors when the pressure is applied to the sensorized brake pad.

Abstract: The present disclosure relates to a method for computing a friction estimate between a road surface and a tire of a vehicle. The method comprises applying a controllable torque to at least one of wheel of the vehicle and determining a vehicle velocity when the controllable torque is applied. Estimate a present tire force acting on the first tire when the torque is applied. Based on a vehicle velocity, estimate the present slip of the tire. Determining a present gradient of the tire force with respect to the slip based on the present tire force and the value indicative of the present slip. When the present gradient exceeds a predetermined first gradient threshold value and is below predetermined second gradient threshold value, compute the friction estimate.

Abstract: The present invention provides a device and method for testing wear and friction properties of different materials under various experimental conditions representative of real usage conditions. In general, the device according to the invention is based on contacting a sample with a rotating disk with intermittent contact, in “open cycle” conditions, where dynamic loads are applied to the sample for the contact to occur. The control of dynamic loading is fully independent of the disk rotation.

Abstract: Real-time correction of vehicle load curve for dynamometer testing, and associated systems and methods are disclosed herein. In one embodiment, a method for replicating an on-road performance and/or a failure of a road vehicle in a test facility includes applying a load curve to a controller of the test facility and testing a test vehicle in the test facility using the load curve. The method also includes verifying whether the performance/failure is replicated on the test vehicle, and if the performance/failure is not replicated, changing at least one parameter in the load curve.

Abstract: A device for torque measurement of friction includes a cylindrical core and a cap with a central cavity for receiving the cylindrical core. The cap includes at least one protrusion or indent on an inner surface, and the cylindrical core includes at least one protrusion or indent on an exterior surface. The device includes at least one protrusion to provide a pulsed interference contact with a second protrusion or indent on the cylindrical core or cap as the protrusion moves into and out of contact with the at least one second protrusion or indent when the cap is rotated about the cylindrical core. The device may be connected to a test apparatus configured to measure rotational torque between the cap and cylindrical core as they rotate with respect to one another.

Abstract: An apparatus for testing a coefficient of friction of an article is provided. The apparatus includes a base, a ramp, and an actuator. The ramp includes a first rail and a second rail that are spaced apart by a first distance. The first and second rails cooperate to define a first travel path for the article. The actuator is coupled with the base and is operably coupled with the ramp to facilitate selective pivoting of the ramp between a first angular position and a second angular position.

Abstract: A CFME apparatus for continuously measuring coefficient of friction of a paved runway or paved road at any speed up to 105 kilometers per hour with improved efficiency for more precise measurements on ice-contaminated pavement, the improved precision being achieved by reducing the standard deviation in the file of recorded measurements normally recorded at an average rate of one measurement per second includes a frame attached to a vehicle mounting a vertical rotatable shaft pivotally carrying a suspension arm trailing rearwardly and downwardly so as to carry a test wheel at a rear end thereof in a wheel plane different from a forward plane to swivel about an upstanding axis in response to a torque applied to the suspension arm about the upright axis by the test wheel. A sensor is responsive to changes in the angle between the forward plane and the wheel plane caused by changes in coefficient of friction.

Abstract: The present invention discloses a fault diagnosis and life testing machine for a flexible precision thin-wall bearing (16), including a rack, and an axial loading device, a main driving device, a bearing mounting device, a clamping tooling, a data acquisition device, a hydraulic and a pneumatic auxiliary device which are provided on the rack. The main driving device is connected to a rear side of the axial loading device, and the clamping tooling is arranged at a front side of the axial loading device, for clamping the thin-wall bearing (16) onto the bearing mounting device. The data acquisition device is arranged in the axial loading device and at a side of the rack, the hydraulic and pneumatic auxiliary device is arranged at a side of the rack, and the axial loading device and the main driving device are connected by a pipeline.

Abstract: A method of performing a test on a tyre to record data for parameterisation of a tyre model, wherein the method is performed on a tyre mounted on a wheel and supported on a mobile axle with respect to a movable testing surface. The method includes supporting the tyre with respect to the movable test surface such that the slip angle of the tyre is controllable and such that the loading on the tyre is controllable, steering the tyre with respect to the test surface so as to vary the tyre slip angle, and applying load to the tyre in dependence on tyre slip angle so as to simulate real life tyre loading conditions. Aspects and embodiments of the invention also provide a computer program product and a machine readable medium. Beneficially, the method results in a tyre being tested under more realistic conditions since the applied tyre loading varies in dependence on the tyre slip angle, thereby mimicking the loading on the tyre experienced as vehicle weight transfers during cornering.

Abstract: A micro-electro-mechanical system (MEMS) device and a method of testing a MEMS device. The device includes a MEMS sensor having first and second mobile elements, first and second electrodes arranged to deflect the mobile elements by the application of test voltages, and a differential detector circuit. The device also includes an input multiplexer circuit configured selectively to connect each electrode to a test voltage source to apply a plurality of test voltages to deflect the mobile elements during a test mode. The test voltages comprise a set of monotonically increasing test voltages and a set of monotonically decreasing voltages for performing a C(V) sweep to test for stiction. The device further includes an output multiplexer circuit configured selectively to connect the first mobile element and/or the second mobile element to a single one of the inputs of the detector circuit to detect the deflection of the mobile element.

Abstract: A method for testing a multi-axis micro-electro-mechanical system(MEMS) acceleration sensor includes applying a first voltage to a first-axis excitation plate to move a first proof mass in contact with a proof mass stop. A second voltage is applied to a second-axis excitation plate while maintaining the first voltage to the first-axis excitation plate, to move the first proof mass in a direction orthogonal to the first-axis while in contact with the proof mass stop A reference voltage is applied to the first-axis excitation plate and a determination is made whether an output voltage of the MEMS device is higher than a threshold voltage. If the output voltage is higher than the threshold voltage ten stiction is detected and stiction recovery may therefore be preformed.

Abstract: A wear testing method includes setting a rotational speed of a rotary drum with a rubber sample attached to an outer surface thereof to a desired speed; setting a pressing load imparted by a contact member to a desired pressing load via a weight member; selecting as the contact member a desired contact member from a plurality of contact members with varying specifications for a contact surface that comes into contact with the surface of the rubber sample; attaching an arm portion that composes a pressing mechanism; rotating the rotary drum; and pressing the contact member against the surface of the rubber sample with the contact member being moveable in a tangent line direction of a rotation direction of the rotary drum, and detecting an amount of displacement in a pressing direction of the contact member pressing against the surface of the rubber sample via a displacement sensor.

Abstract: A system for testing a device under a high gravitational force including a centrifuge with a rotating member and method of operation thereof. An operating power can be applied to a device, which can be coupled to the rotating member. The system can include a rotational control that can be coupled to the centrifuge. This rotational control can be configured to rotate the rotating member in response to a controlled number of revolutions per time period. The system can also include an analysis device for monitoring one or more signals from the device with respect to the controlled number of revolutions per time period. The analysis device can be configured to determine a stiction force associated with the DUT (Device Under Test) in response to the time-varying gravitational forces and to the one or more signals from the DUTs.

Abstract: A control system for a vehicle having two motors is provided to limit damage on rotary members even if an excessive torque is applied from drive wheels. The control system comprises a first motor, a second motor, and a locking mechanism, and a differential mechanism disposed between the first motor and the drive wheels. The locking mechanism halts one of rotary elements of a differential mechanism when torque of the rotary member is small, and allows the rotary element to rotate when the torque of the rotary member is large. A controller is configured to increase power output of the first motor and decrease power output of the second motor during propulsion on an uneven road surface.

Abstract: A tester to estimate co-efficient of friction and determine other properties of a sample lubricant is disclosed. The tester includes a base structure mounted on a compound bearing and a ballpot located on the base structure. The ballpot carries at least three non-rotating balls. Further, the tester includes a bi-direction rotatable motor with a rotatable shaft having a rotating ball. In addition, the tester includes a loading system to load the non-rotating balls against the rotating ball. A load sensor connected to the loading system measures applied load. Furthermore, the tester includes at least one load cell provided in communication with the ballpot to provide at least one output signal. The output signal received from the load cell and the load sensor is recorded and processed in a data acquisition and control system.

Abstract: A test bench for measuring forces and torques of rotatably mounted bodies in charging devices. The test bench has a rotatably mounted body of a charging device, a measuring component, and a bearing component for mounting the measuring component. The bearing component is configured in such a way that the measuring component is frictionlessly mounted in the bearing component.

Abstract: An actuator system includes a motor, a ballscrew assembly coupled to the motor, a no back brake device coupled to the ballscrew assembly, and a sensor coupled to the ballscrew assembly. The sensor is configured to acquire load data regarding a load applied to the no back brake device. A control module is configured to determine an estimated coefficient of friction for the no back brake device based on the load data, and transmit an alert signal based on determining that the estimated coefficient of friction is outside a predetermined range. The control module is coupled with the sensor and includes a processor coupled with a non-transitory processor-readable medium storing processor executable code.

Abstract: The present invention relates generally to an adherent sensor patch for wireless and remote physiological monitoring and evaluation of health and disease state of a patient wearing the patch, and specifically with respect to cardiac and pulmonary pathologies, including heart failure and sleep apnea. Data generated by the patch, which includes a microphone sensor and other sensors, is processed by a remote server and is made accessible to caregivers and also used to manage, calibrate and control the operations of the sensors of the patch.

Abstract: A testing rig and method of testing a bearing with the rig, wherein the rig includes a bearing housing, wherein said bearing housing includes an opening and a drive shaft extending into said opening, wherein the drive shaft is rotatable around a bearing axis. The testing rig also includes a vertical actuator mounted on the bearing housing for applying a vertical load to the bearing housing and a horizontal actuator mounted on the bearing housing for applying a horizontal load to the bearing housing. In addition, the testing rig includes a first misalignment actuator coupled to the first actuator for applying a first misalignment load to the bearing housing and a second misalignment actuator coupled to the bearing housing for applying a second misalignment load to the bearing housing.

Abstract: A bearing diagnostic device senses a failure in a bearing of a machine tool including a rotation shaft device. The bearing diagnostic device includes a rotation counting unit, a temperature measuring unit, a frictional torque calculating unit, a rolling speed calculating unit, a bearing characteristic calculating unit, a storage unit, and a determination unit. The frictional torque calculating unit is configured to calculate a frictional torque of the rotation shaft device. The rolling speed calculating unit is configured to calculate a rolling speed of the bearing from the count of rotations. The bearing characteristic calculating unit is configured to calculate a bearing characteristic from the frictional torque and the rolling speed. The determination unit is configured to compare the bearing characteristic calculated by the bearing characteristic calculating unit with a reference bearing characteristic stored in the storage unit to determine a presence of a failure.

Abstract: A bearing test apparatus has a bearing cap coupled to an outer ring of a bearing to be tested (a “test bearing”), a driving rotary shaft coupled to an inner ring of the test bearing to rotate the inner ring, and a bearing torque meter for measuring a single torque of the test bearing, wherein an extension bar is formed at the bearing cap to protrude thereon, wherein the bearing torque meter includes a measurement rod configured to contact the extension bar and be fixed to support the extension bar in a direction opposite to a rotating direction of the driving rotary shaft, and a power sensor for measuring a force applied to the measurement rod, wherein the single torque of the test bearing is calculated based on a distance from the driving rotary shaft to the measurement rod and a force applied to the measurement rod.

Abstract: A component assembly apparatus includes a first device supportive of a first component and a second device configured to bring a second component into contact with the first component. The second device is further configured to apply a first pressurizing force directed to force respective first surfaces of the first and second components together, and the first device is configured to convert a portion of the first pressurizing force into a second pressurizing force directed transversely with respect to the first pressurizing force to force respective second surfaces of the first and second components together.

Abstract: A calculating device of the stiffness measurement device pressurizes an object to be measured with a predetermined pressure and the stiffness of the object to be measured in the squeal frequency band is calculated based on an inclination of a stress-displacement performance curve immediately after a start of depressurization after the pressurization. According to this device, there is no need to oscillate the object with a high frequency band and there is no need to enhance the stiffness of the housing of the measurement device, which leads to a downsizing of the device. Further, there is no need for measuring of acceleration speed of the object to be measured and accelerator can be eliminated to reduce the cost of the stiffness measurement device.

Abstract: A method for estimating a tire state, such as tire wear state, includes utilizing a vehicle-based sensor for measuring a wheel speed of the tire and generating a wheel speed signal, extracting through statistical analysis a first extracted feature such as slip-ratio rate from the wheel speed signal, extracting through statistical analysis a second extracted feature such as median slip-ratio from the wheel speed signal, classifying data from the first extracted feature and data from the second extracted feature using a support vector data classification algorithm and applying the algorithm to estimate the tire state.