Flowmeter

• US 7,296,482 B2
• Filed: 07/08/2003
• Issued: 11/20/2007
• Est. Priority Date: 07/08/2003
• Status: Expired due to Fees

• Current Assignee: Endress+Hauser Flowtec AG (Endress+Hauser AG)
• Original Assignee: Endress+Hauser Flowtec AG (Endress+Hauser AG)
• Inventors: Schaffer, Joseph W., Sylvia, Dean
• Primary Examiner(s): THOMPSON, JEWEL VERGIE
• Application Number:
  US10/614,759
• Publication Number:
  US 20050005709A1
• Time in Patent Office: 1,596 Days
• Field of Search: 738/612.8, 738/612.7, 738/610.8, 738/61
• US Class Current: 73/861
• CPC Class Codes: G01F 1/667 Arrangements of transducers for ultrasonic flowmeters; Circuits for operating ultrasonic flowmeters

Abstract

A flowmeter suitable for replacement of differential pressure flowmeters comprising: a primary flow sensor, sensor electronics for proving a measurement signal; a signal processing unit for determining the flow, which can be set to produce a signal proportional to the flowrate or the square of the flowrate; and an output signal generator for generating an output signal proportional to the signal of the signal processing unit.

Claims

1. A flowmeter for replacing a differential flowmeter in a fluid flow system, comprising:

a primary flow sensor;

sensor electronics connected to said primary flow sensor for proving a measurement signal;

a signal processing unit connected to said sensor electronics for determining the flow, said signal processing unit being set to produce a signal proportional to the square of the flowrate; and

an output signal generator for generating an output signal proportional to the signal of the signal processing unit.

2. An ultrasonic flowmeter for measuring fluid flow and for replacing a differential flowmeter in a fluid flow system, comprising:

a primary flow sensor including a pair of ultrasonic transducers which are spaced apart in the direction of the fluid flow, each ultrasonic transducer emitting an ultrasonic beam into the fluid flow which is received by the other ultrasonic transducer;

sensor electronics connected to and receiving the signals generated by said ultrasonic transducers, and generating therefrom a measurement signal; and

a signal processing unit for receiving said measurement signal and determining the flow of the fluid by producing a signal proportional to the square of the flowrate of the fluid.