# US 2014/0190274 A1 · Inferential Coriolis Mass Flowmeter

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- Number: US 2014/0190274 A1
- Document ID: US20140190274A1
- Status: Published application
- Kind: A1
- Application number: 14/239,823
- Filed: 2012-08-17
- Published: 2014-07-10
- Earliest claimed: 2011-08-22
- Assignees: Universiti Malaya
- Inventors: Mahidzal Dahari
- Web page: https://patentgrep.com/patent/US20140190274A1

## CPC

- G01F 9/001: {with electric, electro-mechanic or electronic means (G01F9/008 and G01F9/02 take precedence)}
- G01F 1/8427: {detectors}
- G01F 1/8431: {electronic circuits}
- G01F 1/8436: {signal processing}
- G01F: MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME

## Abstract

The present invention relates to an inferential coriolis mass flowmeter characterized by: a power supply (10);a pressure sensor (11) connected to the power supply (10) and a tube of fluid; a current to voltage converter (13) connected to the pressure sensor (11) for converting a current signal from the pressure sensor (11) to a voltage signal; a controller unit (20) including an analogue to digital converter (21) connected to the current to voltage converter (13) for converting analogue signal from the current to voltage converter (13) to a digital signal, and a microprocessor (22) for processing the digital signal from the analogue to digital converter (21) to determine the mass flowrate of the fluid, wherein said microprocessor (22) is embedded with an algorithm to determine the mass flowrate of a fluid according to equation (1): y=0.002x4−0.0218x3+0.0865x2+0.8769x+0.0846 ; a display panel (14) connected to the microprocessor (22); and a transmission circuit (15) connected to the microprocessor (22).

## Claims

### Claim 1

An inferential coriolis mass flowmeter characterized by:
a power supply (10);
a pressure sensor (11) connected to the power supply (10) and a tube of fluid for sensing the change of pressure of the fluid within the tube;
a current to voltage converter (13) connected to the pressure sensor (11) for converting a current signal from the pressure sensor (11) to a voltage signal;
a controller unit (20) including an analogue to digital converter (21) connected to the current to voltage converter (13) for converting analogue signal from the current to voltage converter (13) to a digital signal, and a microprocessor (22) for processing the digital signal from the analogue to digital converter (21) to determine the mass flowrate of the fluid, wherein said microprocessor (22) is embedded with an algorithm to determine the mass flowrate of a fluid according to equation (1):
y=0.002x4−0.0218x3+0.0865x2+0.8769x+0.0846 (1)
wherein R2=1
and wherein:
y is a mass flowrate of the fluid,
x is a pressure value detected by the pressure sensor.
a display panel (14) connected to the microprocessor (22) for displaying the result processed by the microprocessor (22); and
a transmission circuit (15) connected to the microprocessor (22) for exporting the result processed by the microprocessor (22) to an external devices.

### Claim 2 (depends on 1)

An inferential coriolis mass flowmeter according to claim 1, wherein the controller unit (20) is a Peripheral Interface Controller.

### Claim 3 (depends on 2)

An inferential coriolis mass flowmeter according to claim 2, wherein the Peripheral Interface Controller is reprogrammable to add variables, for example type of fluid, climate, surrounding pressure and humidity, to the algorithm.

### Claim 4 (depends on 1)

An inferential coriolis mass flowmeter according to claim 1, wherein the transmission circuit (15) is a serial communication circuit.

### Claim 5 (depends on 1)

An inferential coriolis mass flowmeter according to claim 1, wherein a regulator (12) is connected to the power supply (10) for regulating the current from the power supply (10) to the current-voltage converter (13), the controller unit (20), the display panel (14) and the communication circuit (15).