A microfabricated magnetic resonator is provided. The microfabricated magnetic resonator has one or more resonator portions, each of which is a magnetoelastic resonating structure having a maximum circumference or maximum linear dimension in at least one direction that is less than 1000 m. At least one of the resonator portions comprises an electrodeposited material comprising at least a cobalt constituent and an iron constituent.

Pressure sensors that may be used in flowrate monitoring or measuring systems, where the pressure sensors may enable simple, low-cost designs that are readily implemented. One example may provide a pressure sensor having a built-in flow path with a dimensional variation. Pressures of a fluid on each side of the dimensional variation may be compared to each other. The measured differential pressure may then be converted to a flowrate through the flow path.

A method for determining a strength of a bond and/or a material using a bond tester apparatus, said method comprising the steps of applying a mechanical force to said bond, determining, by a sensor component comprised by said bond tester apparatus, said applied force to said bond by measuring, by said sensor component, a displacement of said sensor component caused by said applied force and calculating, by said sensor component, said applied force on the basis of a first component which comprises a direct relationship with said measured displacement and on the basis of at least one of a second component, a third component and a fourth component.

The invention relates to a vibrating bridge for a vibrating-wire sensor, comprising opposing clamping points for connecting the vibrating bridge to the vibrating-wire sensor and comprising multiple vibrators which are provided between the clamping points and which are mechanically connected to the securing points and can be tensioned via the securing points, wherein one of the vibrators is free of a vibration exciter or vibration detector, and another vibrator is provided with a vibration exciter.

The disclosure provides a vibrating wire compressive stress gauge and stress testing equipment suitable for use in low-temperature environments. By providing a stress trigger sleeve made of elastic material, the concrete structure of the lining itself expands when it is affected by high or low temperatures, extruding the stress trigger sleeve, and the extrusion force is offset through the elastic force of the elastic material, thereby preventing the expansion force from being transmitted to the vibrating wire assembly to generate stress signals that are caused by the self-expansion of the lining structure, which may cause measurement error. Specifically, the vibrating wire assembly is provided in the vibrating wire measurement space composed of a stress trigger sleeve and a pair of anchoring disks. When the lining is subjected to external stress, a certain internal force will be generated.

A stress estimation method for a machine structure according to an embodiment is provided with a calculation step of calculating a relationship between the stress generated at the evaluation target position and a physical quantity including a sound pressure or vibration generated at a detection position different from the evaluation target position during vibration of the machine structure. The stress estimation method for a machine structure is provided with a detection step of detecting the physical quantity generated at the detection position during operation of the machine structure. The stress estimation method for a machine structure is provided with an estimation step of estimating the stress generated at the evaluation target position during operation of the machine structure on the basis of the relationship calculated in the calculation step and the physical quantity detected in the detection step.

A health device is also provided. The health device comprises a health device body and a pressure sensing system. The pressure sensing system is located on the health device body. The pressure sensing system comprises a plurality of pressure sensors, a reminder device a battery system, and a main circuit board. The plurality of pressure sensors is spaced from one another. The plurality of pressure sensors, the reminder device, and the battery system are electrically connected to the main circuit board.

A resonator includes a vibrator with a base, and multiple vibrating arms extending therefrom. Moreover, a frame surrounds a periphery of the vibrating part and a holding arm couples the vibrator to the frame. The holding arm includes a pair of first support arms that are connected to the base opposite the vibrating arms and a coupling portion that couples the support arms with one another and that is connected to the frame.

A physical quantity sensor includes: a base portion; a first arm portion, a second arm portion, and a third arm portion that are coupled to the base portion and that are provided with fixing portions; a movable portion disposed between the first arm portion and the second arm portion and between the first arm portion and the third arm portion in a plan view; a constricted portion that is disposed between the base portion and the movable portion, and that couples the base portion and the movable portion; and a physical quantity detection element that is disposed across the constricted portion in the plan view and that is attached to the base portion and the movable portion. Thin portions are formed at least at two positions in at least one of the second arm portion and the third arm portion.

A method and apparatus for analyzing an object using acoustic emissions. Load data is received for the object. Acoustic waveform data is received for the object from an acoustic sensing system. The acoustic waveform data represents acoustic emissions emanating from the object and is detected using the acoustic sensing system. A plurality of bins is created for the load data. A plurality of frequency distribution functions is generated for the plurality of bins using the acoustic waveform data. A set of learning algorithms is applied to the plurality of frequency distribution functions and the acoustic waveform data to generate an output that allows an operator to more easily and quickly assess a structural integrity of the object.