31 results about "Vibrameter" patented technology

A method for calculating a fluid parameter of a fluid flowing through a vibratory flow meter is provided. The method comprises vibrating the flow meter at one or more frequencies and receiving a vibrational response. The method further comprises generating a first fluid property and generating at least a second fluid property. The method further comprises calculating a fluid parameter based on the first fluid property and the at least second fluid property.

Embodiments of the present disclosure relate to vibrometers, vibrometric systems, and methods of using the same. In particular, some embodiments of the vibrometers are capable of producing vibrotactile stimulation at any frequency between 1 and 500 Hz. Moreover, some embodiments of the vibrometer and / or vibrometric system are capable of applying vibrotactile stimulation to a test subject's skin to determine the existence of peripheral neuropathy. Additionally, some embodiments of the method can provide test subjects with comparative vibrotactile threshold test results that can aid in discovering and / or managing of peripheral neuropathy.

The infrasound generating device based on a displacement-feedback type vibration exciter comprises a displacement-feedback type vibration exciter system, an infrasound generating chamber (3) and a laser vibrometer (1); the displacement feedback mechanism is adopted in the vibration exciter (2). The piston (31) is driven by the vibration exciter to move in a sinusoidal manner in the cavity (35) of the airtight infrasound generating chamber (3) and the standard infrasonic pressure signal with low harmonic distortion can be achieved. The displacement of the moving part (22) of the vibration exciter (2) can be measured by the laser vibrometer (1) through the measurement beam (15) injecting into the vibration exciter (2) through the optical channel running through the vibration exciter and the standard infrasonic pressure can also be obtained. The value of the standard sound pressure produced by the infrasound generating chamber is calculated. Such value is used as the calibration reference for the infrasound sensors (4) to be calibrated in order to achieve the primary calibration of the infrasound sensors. The standard infrasonic sensor can be installed inside the infrasound generating chamber (3) and the output of the standard infrasonic sensor can be used as the reference for the infrasonic sensor (4) to be calibrated in order to achieve the secondary calibration of the infrasound sensors. This invention has the advantages of technical maturity, high feasibility, easy to realize, high calibration accuracy and so on.

The invention discloses a landmine multi-modal vibration mode measurement device and method. The landmine multi-modal vibration mode measurement device comprises a signal generator, a sound emission unit, a sound level meter, a laser Doppler vibrometer, a multi-channel data acquisition card, a computer and a caisson, wherein the signal generator is connected with the sound emission unit through a data line; the sound level meter and the laser Doppler vibrometer are sequentially connected with the multi-channel data acquisition card and the computer through data lines; high-intensity and low-frequency sound waves with continuous sweep frequency are emitted out through the signal generator and the sound emission unit, the sound level meter and the laser Doppler vibrometer detect the sound pressure level of the upper end face of a landmine and an amplitude-frequency characteristic curve of the vibration speed respectively, and the multi-order inherent frequency of the landmine is measured out; the signal generator and the sound emission unit emit high-intensity sound wave signals with the inherent frequency of the landmine as the output frequency, and the laser Doppler vibrometer, the multi-channel data acquisition card and the computer detect, display and record a multi-modal vibration mode of the landmine. The landmine multi-modal vibration mode measurement device and method achieve non-contact type rapid and accurate measurement of the multi-modal vibration mode of the landmine.

The invention discloses an earth surface specific acoustic impedance non-contact measurement device and method. The earth surface specific acoustic impedance non-contact measurement device comprises a sound wave emitting system, a detection device of earth surface sound waves to be tested and a detection device of earth surface vibration speed to be tested. The sound wave emitting system comprises a computer, a data collection card, a signal processing amplifier and an acoustic parametric array. The detection device of earth surface sound waves to be tested comprises the sound wave emitting system, a sound level meter and a computer. The detection device of earth surface vibration speed to be tested comprises the sound wave emitting system, a Doppler vibrometer, a data collection card and a computer. The sound wave emitting system emits high-directivity high-frequency sound waves, low-frequency sound waves are generated at the earth surface position to be tested, a sound pressure level detection device detects the sound pressure level at the earth surface position to be tested, an earth surface vibration speed detection device detects the vibration speed at the earth surface position to be tested, and the ratio of the sound pressure level at the detected earth surface position and the vibration speed at the detected earth surface position is the earth surface specific acoustic impedance. The earth surface specific acoustic impedance non-contact measurement device and method can achieve non-contact, high-accuracy and fast measurement of the earth surface specific acoustic impedance.

A method for temperature compensation of a signal in a vibratory meter is provided. The method includes obtaining one or more signals from a meter assembly in the vibratory meter, providing the one or more signals to a meter electronics of the vibratory meter, and compensating the one or more signals with a signal parameter offset, wherein the signal parameter offset is based on a temperature of the meter electronics.

A vibratory meter (5, 1600) configured to predict and reduce noise in the vibratory meter (5, 1600). The vibratory meter (5, 1600) includes a sensor assembly (10, 1610) and a meter electronics (20, 1620) in communication with the sensor assembly (10, 1610). The meter electronics (20, 1620) is configured to provide a drive signal to a sensor assembly (10, 1610), receive a sensor signal from the sensor assembly (10, 1610) having one or more components, and generate a signal to be applied to one of the sensor signal and the drive signal to compensate for the one or more components.

A vibratory meter (5) is provided, having a driver (104) and a vibratory member (103, 103′) vibratable by the driver (104). At least one pickoff sensor (105, 105′) is configured to detect vibrations of the vibratory member (103, 103′). Meter electronics (20) comprise an interface (301) configured to receive a vibrational response from the at least one pickoff sensor (105, 10540 ), and a processing system (303) coupled to the interface (301). The processing system (303) is configured to measure a drive gain (306) of the driver (104), and measure a total density (325) of a multiphase process fluid in the vibratory meter (5), and determine whether the drive gain (306) is below a first threshold. A liquid / liquid phase concentration allocation is determined with the measured total density (325) if the drive gain (306) is below the first threshold, and a flow rate for each liquid phase is calculated.

A vibration meter having a pressure sleeve is proposed, in which the pressure sleeve (2, 22) may be mounted under pressure at a bottom surface (20) on a component causing vibrations, and the bottom surface (20) has a contour, prior to mounting, which runs radially inward in a concave manner. Furthermore, prior to mounting, the bearing surface (21) has a contour, which runs radially inward in a concave manner, the contour being dimensioned such that, after the mounting, at least one sensor arrangement (7, 5, 6, 8) lies substantially flat on the bearing surface (21) on the inside of the pressure sleeve (22).

A system (600, 700) for correcting a measured flow rate for viscosity effects of a fluid in a vibratory meter (5) is provided. The system (600, 700) includes a sensor assembly (10) and a meter electronics (20) communicatively coupled to the sensor assembly (10). The meter electronics (20) is configured to receive sensor signals from the sensor assembly (10), determine a non-viscosity correlation parameter based on the sensor signals, and correlate the non-viscosity correlation parameter to a viscosity of a fluid in the sensor assembly (10).

The invention discloses a sound-seismic coupling efficiency measuring device and measuring method. The device comprises a sound wave transmitting system, a to-be-measured ground surface sound wave detecting device and a to-be-measured ground surface vibration speed detecting device. The sound wave transmitting system comprises a computer, a data collecting card, a signal processing amplifier and an acoustic parametric array, the to-be-measured ground surface sound wave detecting device comprises the sound wave transmitting system, a sound level meter and the computer, the to-be-measured ground surface vibration speed detecting device comprises the sound wave transmitting system, a Doppler vibrometer, the data collecting card and the computer, the sound wave transmitting system sends out high-frequency sound waves with the high directivity, low-frequency sound waves are generated on the to-be-measured ground surface, a sound pressure level detecting device detects the sound pressure level of the to-be-measured ground surface, a ground surface vibration speed detecting device detects the vibration speed of the to-be-measured ground surface, and the ratio of the measured vibration speed at the ground surface to the sound pressure level is the sound-seismic coupling efficiency. The non-contact, high-precision and rapid measuring of the sound-seismic coupling efficiency can be achieved.

A metrology electronic device (20) for detecting orientation and compensating for measurements based on the detected orientation is provided. The metrology electronics (20) includes a processing system (402) and an interface (401) configured to be communicatively coupled to the sensor assembly (10). The processing system (402) is configured to detect an orientation of the sensor assembly (10) based on the one or more sensor signals provided by the sensor assembly (10).

A viscometer (700) is provided, for determining a viscosity of a gas therein. The viscometer (700) comprises a driver (704) and a planar vibratory member (500, 600) vibratable by the driver (704), that comprises a body (502) and a vibratable portion (504) emanating from the body (502), wherein the vibratable portion (504) comprises a plurality of vibratable cantilevered projections. At least one pickoff sensor (706) is configured to detect vibrations of the vibratory member (500, 600). Meter electronics (900) comprise an interface (901) configured to send an excitation signal to the driver (704) and to receive a vibrational response from the at least one pickoff sensor (706), measure a Q and resonant frequency of the planar vibratory member (500, 600), and to determine a viscosity (923) of the gas therein using the measured Q and the measured resonant frequency.

Provides a method of determining the zero offset of a vibrating meter under process conditions. The method includes: measuring a flow rate of a substance in a vibratory meter, determining whether the measured flow rate is less than a low flow threshold, measuring one or more operating parameters of the vibratory meter, determining whether the one or more measured operating parameters of the vibratory meter are within Within the corresponding range, and if the measured flow rate is less than the low flow threshold and if one or more measured operating parameters of the vibratory meter are within the corresponding range, then a zero offset for the vibratory meter is determined based on the measured flow rate.

A system (600) and method (500) for the standard traceable verification of a vibratory meter (5) is provided. The system (600) includes a storage device(610) having a baseline meter verification valueof the vibratory meter and a processing system (620) in communication with the storage device (610). The processing system (620) is configured to obtain the baseline meter verification value from thestorage device (610) and determine the relationship between the baseline meter verification value and a calibration value of the vibratory meter, and the calibration value is traceable to a measurement standard. The method (500) provides the traceable verification of the vibratory meter by comparing (540) a physical property of the vibratory meter which is determined from the first calibration value with the reference value determined from the second calibration value, and the calibration values is traceable to a measurement standard.

A vibratory meter (5) including a multi-channel flow tube (130) is provided. The vibratory meter (5) includes a meter electronics (20) and a meter assembly (10) communicatively coupled to the meter electronics (20). The meter assembly (10) includes the multi-channel flow tube (130, 330, 430, 530) comprising two or more fluid channels (132, 332, 432, 532) surrounded by a tube wall (134, 334, 434, 534). The two or more fluid channels (132, 332, 432, 532) and the tube wall (134, 334, 434, 534) comprise a single integral structure. A driver (180) is coupled to the multi-channel flow tube (130, 330, 430, 530). The driver (180) is configured to vibrate the multi-channel flow tube (130, 330, 430, 530). The two or more fluid channels (132, 332, 432, 532) and the tube wall (134, 334, 434, 534) areconfigured to deform in the same direction as the single integral structure in response to a drive signal applied to the driver (180).

A gas sensor includes a microbeam configured to vibrate when driven by a driving electrode; a vibrometer configured to measure a frequency associated with a vibration of the microbeam; a power source configured to apply a first voltage (V1) to the microbeam to heat the microbeam; and a controller configured to control the power source and to receive the frequency measured by the vibrometer. The controller controls the power source to heat the microbeam so that the microbeam is at a buckling point, and the controller determines at least one characteristic of a gas present around the microbeam, based on the frequency received from the vibrometer.

The invention relates to a measuring device and method for multi-mode mode shapes of landmines, comprising a signal generator, an acoustic emission unit, a sound level meter, a laser Doppler vibrometer, a multi-channel data acquisition card, a computer and a mine box; The sound level meter and the laser Doppler vibrometer are respectively connected to the multi-channel data acquisition card and the computer in turn through the data line; the continuous sweeping high-intensity low-frequency sound waves are emitted by the signal generator and the acoustic emission unit , and the amplitude-frequency characteristic curves of the sound pressure level and the vibration velocity of the upper surface of the mine are detected by the sound level meter and the laser Doppler vibrometer respectively, and the multi-order natural frequencies of the mine are measured; The natural frequency of the mine is a high-intensity acoustic signal at the output frequency, and the multi-mode mode shape of the mine is detected, displayed, and recorded by a laser Doppler vibrometer, a multi-channel data acquisition card and a computer. The invention realizes non-contact rapid and accurate measurement of multi-mode vibration shapes of mines.

There are provided devices, systems and methods utilizing interferometric retro-reflection displacement / vibration meter. In particular, there are provided laser interferometer devices, systems and methods for measuring three-axis small angle displacements and vibrations of a body.

Vibratory meters (5), and methods for their use measuring a fluid are provided. Each vibratory meter includes a multichannel flow tube (300) comprising two or more fluid channels (302), a pickoff (170), a driver (180), and meter electronics (20) configured to apply a drive signal to the driver at a drive frequency, and measure a deflection of the multichannel flow tube with the pickoff. In examples, at least one fluid channel has an effective diameter that is related to kinematic viscosity, inverse Stokes number, and drive frequency; velocity of sound and drive velocity; or the length of the flow tube. In further examples, the driver may apply a drive signal to the driver having a drive frequency proportional to the kinematic viscosity, inverse Stokes number, and effective diameter; or velocity of sound and effective diameter.