# Fluid density and concentration measurement using noninvasive in situ ultrasonic resonance interferometry

## Abstract

The specific gravity or solute concentration of a process fluid solution located in a selected structure is determined by obtaining a resonance response spectrum of the fluid/structure over a range of frequencies that are outside the response of the structure itself. A fast Fourier transform (FFT) of the resonance response spectrum is performed to form a set of FFT values. A peak value for the FFT values is determined, e.g., by curve fitting, to output a process parameter that is functionally related to the specific gravity and solute concentration of the process fluid solution. Calibration curves are required to correlate the peak FFT value over the range of expected specific gravities and solute concentrations in the selected structure. 7 figs.

- Inventors:

- Issue Date:

- OSTI Identifier:
- 6819343

- Patent Number(s):
- 5359541

- Application Number:
- PPN: US 8-024128

- Assignee:
- Univ. of California, Office of Technology Transfer, Alameda, CA (United States)

- DOE Contract Number:
- W-7405-ENG-36

- Resource Type:
- Patent

- Resource Relation:
- Patent File Date: 1 Mar 1993

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ON-LINE MEASUREMENT SYSTEMS; CALCULATION METHODS; PROCESS SOLUTIONS; CONCENTRATION RATIO; DENSITY; FOURIER TRANSFORMATION; MEASURING INSTRUMENTS; DISPERSIONS; INTEGRAL TRANSFORMATIONS; MIXTURES; ON-LINE SYSTEMS; PHYSICAL PROPERTIES; SOLUTIONS; TRANSFORMATIONS; 400102* - Chemical & Spectral Procedures

### Citation Formats

```
Pope, N G, Veirs, D K, and Claytor, T N.
```*Fluid density and concentration measurement using noninvasive in situ ultrasonic resonance interferometry*. United States: N. p., 1994.
Web.

```
Pope, N G, Veirs, D K, & Claytor, T N.
```*Fluid density and concentration measurement using noninvasive in situ ultrasonic resonance interferometry*. United States.

```
Pope, N G, Veirs, D K, and Claytor, T N. Tue .
"Fluid density and concentration measurement using noninvasive in situ ultrasonic resonance interferometry". United States.
```

```
@article{osti_6819343,
```

title = {Fluid density and concentration measurement using noninvasive in situ ultrasonic resonance interferometry},

author = {Pope, N G and Veirs, D K and Claytor, T N},

abstractNote = {The specific gravity or solute concentration of a process fluid solution located in a selected structure is determined by obtaining a resonance response spectrum of the fluid/structure over a range of frequencies that are outside the response of the structure itself. A fast Fourier transform (FFT) of the resonance response spectrum is performed to form a set of FFT values. A peak value for the FFT values is determined, e.g., by curve fitting, to output a process parameter that is functionally related to the specific gravity and solute concentration of the process fluid solution. Calibration curves are required to correlate the peak FFT value over the range of expected specific gravities and solute concentrations in the selected structure. 7 figs.},

doi = {},

journal = {},

number = ,

volume = ,

place = {United States},

year = {1994},

month = {10}

}