A vehicle vibration method suitable for performing a test simulating a rough road, the vehicle vibration method using a vibration device that causes at least one wheel of a test target vehicle, the method including: an initial height setting step including setting a shaft distance in the front-rear direction between a front shaft and a rear shaft to an initial setting distance and setting the wheel at an initial setting height; a vibration step including performing vibration by at least one selected from a raising operation step including narrowing the shaft distance from the initial setting distance to raise the wheel from the initial setting height, and a lowering operation step including widening the shaft distance from the initial setting distance to lower the wheel from the initial setting height; and a return step including setting back the shaft distance to the initial setting distance.

A vehicle vibration device including: a variable mechanism which makes orientation of the front shaft variable in order to vibrate wheels back and forth in a vertical direction by pinching in a front/rear direction each wheel of a vehicle by a front shaft and a rear shaft which extend in a left/right direction, and causing the front shaft to move back and forth in a horizontal direction, in which this variable mechanism includes left and right movement mechanisms which are respectively connected to both left and right ends of the front shaft and are capable of moving both the left and right ends back and forth, and causes orientation of the front shaft to vary by making movement amounts by the left and right movement mechanisms to differ, and vibrates the wheels back and forth in a vertical direction, as well as vibrating in a left/right direction.

A device for detecting whether a plurality of electronic components having one or more defective electronic components includes: an energy source generating energy and transferring the generated energy to the plurality of electronic components in a non-contact manner to cause the plurality of electronic components to vibrate; a mechanical resonance detector detecting vibration resonances of the plurality of electronic components; and a post-processing processor comparing the detected vibration resonances of the plurality of electronic components with a reference vibration resonance of a normal product to determine whether the plurality of electronic components have one or more defective electronic components and then extracting determined information.

Embodiments herein relate to systems and methods for detecting aeration properties in fluids using a vibration sensor. In an embodiment, a system for fluid aeration monitoring is included having a vibration sensor configured to be mounted along a fluid flow path, and a control circuit in signal communication with the vibration sensor. The control circuit can be configured to evaluate a signal received from the vibration sensor and calculate one or more aeration parameters based on signals from the vibration sensor. Other embodiments are also included herein.

A method for analyzing a heat exchanger includes a structural model creation step (S1) of creating a structural model of a heat exchanger; a iron-linear model creation step (S4) of creating a iron-linear model in which a non-linear spring element in an out-of-plane direction, in which a load is generated only at me time of contact between a heat transfer tube and an anti-vibration member, is applied to an opposing portion between the heat transfer tube and the anti-vibration member in a structural model, and a load distribution acquisition step (S5) of performing analysis in which a load in the out-of-plane direction is applied to the non-linear model to acquire load distribution of the heat exchanger from a value of the load in each opposing portion.

A method to assess the integrity of a structure is provided and comprises the steps of: i) applying a sinusoidally varying force to the structure at a frequency or frequencies below the lowest frequency that could cause resonance in the structure whereby to set up a dynamic response dominated by the stiffness of the structure; and ii) monitoring the dynamic response of the structure. A device to assess the integrity of a structure is also provided.

There is provided a building facility vibration measurement device that can easily ascertain whether specs are sufficient for measurement of vibration of a building facility. A building facility vibration measurement device includes: an acceleration detection unit configured to detect acceleration; an acceleration collection unit configured to collect the acceleration detected by the acceleration detection unit; an accuracy calculation unit configured to calculate detection accuracy of the acceleration from information on the acceleration collected by the acceleration collection unit; and a judgement unit configured to, based on the detection accuracy calculated by the accuracy calculation unit, judge whether vibration of a building facility can be measured.

A defect inspection apparatus (100) is configured to approximate a difference value or an absolute value (Ia) of the difference value between a pixel value in at least three captured images (A) captured by an imager in at least three different phases of an elastic wave and a pixel value in a reference image (A.sub.ave) separate from the captured images (A) so as to acquire an approximate value for defect inspection corresponding to an amount of change in the pixel value in the captured images (A).

This signal analysis device provides information to assist determining the state of a time series signal. An identification unit (120) identifies events included in the time series signal, and a ranking generation unit (140) generates a ranking among multiple event types.

A method for using sensor data and operational data of an industrial process to identify problems includes gathering sensor data from one or more sensors sensing conditions on equipment of an industrial process, receiving command information about operational commands issued to the equipment of the industrial process, and for each sensor of the one or more sensors, comparing the sensor data with signature information for the sensor. The signature information for the sensor is relevant for operational commands issued to the equipment. The method includes determining if the sensor data of a sensor of the one or more sensors exceeds the signature information corresponding to the sensor, locating a problem with a piece of equipment of the industrial process monitored by the sensor of the one or more sensors based on the sensor data exceeding the signature information for the sensor and issuing an alert reporting the problem.