US 2018/0128662 A1 · METHOD AND APPARATUS FOR DETERMINING THE MASS OF A FLUID FLOWING THROUGH A FLOW RATE METER IN A CONSUMPTION TIME INTERVAL

Abstract

The mass of a fluid flowing through a flow rate meter at a temperature which fluctuates in a given temperature range is determined by driving an exciter magnet system through the fluid with an exact correlation between the fluid volume flowing there through and the movement path covered by the exciter magnet system, producing a measurement voltage pulse after each passage through a movement path corresponding to a unit volume of the fluid by means of a Wiegand wire and a coil surrounding same, at each measurement time charging a first energy storage means by electric energy contained in each measurement voltage pulse, and using same as operating energy for measurement of the instantaneous temperature of the fluid, producing a temperature value as an integral multiple of the smallest temperature measurement unit to be resolved and an integral count value including said temperature value, and adding same to a sum contained in a non-volatile storage means from the precedingly ascertained count values for forming an ongoing sum in the non-volatile storage means and passing same to a processor which can be supplied with external energy and which calculates therefrom the temperature-corrected delivery volume of the fluid.

Claims22

Dependent claims

1-13. (canceled)

A method of determining a mass of a compressible gas flowing through a flow rate meter, the method comprising:

flowing compressible gas through the flow rate meter such that a component of an exciter magnet system is moved through a predetermined movement path;
in response to the component completing a movement through the predetermined movement path, causing a measurement voltage pulse to be generated with the exciter magnet system, wherein the measurement voltage pulse is generated at a measurement time, and wherein the measurement voltage pulse comprises a first amount of electric energy;
charging, at the measurement time, a first energy storage device with a portion of the first amount of electric energy;
and
using, at the measurement time, energy stored in the first energy storage device to:
(i) measure an instantaneous absolute temperature or a parameter derived therefrom of the compressible gas flowing through the flow rate meter;
(ii) produce a temperature value derived from the instantaneous absolute temperature or the parameter derived therefrom;
(iii) produce an integer count value including the temperature value;
and (iv) add the integer count value to a sum of count values contained in a non-volatile memory.

6 more elements

An apparatus configured to determine the mass of a compressible gas whose instantaneous absolute temperature can fluctuate in a given temperature range, the apparatus comprising:

a flow rate meter comprising a unit volume through which the compressible gas is allowed to pass;
an exciter magnet system including a component that is moveable in response to the compressible gas pass through the flow rate meter, wherein there exists an exact correlation between an amount of the compressible gas flowing through the unit volume and a length of a predetermined movement path of the component;
a Wiegand or pulse wire arranged in proximity of the exciter magnet system that produces a measurement voltage pulse when the component has completed the predetermined movement path, wherein the measurement voltage pulse is produced at a measurement time;
and
a first energy storage device in electrical communication with the Wiegand or pulse wire that is charged with the measurement voltage pulse, wherein electric energy contained in the first energy storage device is used at the measurement time to provide power to each of the following:
(i) a temperature sensor that is configured to measure an instantaneous absolute temperature or a parameter derived therefrom of the compressible gas flowing through the flow rate meter;
(ii) a calculation device configured to produce a temperature value derived from the instantaneous absolute temperature or the parameter derived therefrom as well as produce an integer count value including the temperature value;
and (iii) non-volatile computer memory configured to have the integer count value added thereto as a current sum of count values already contained in the non-volatile computer memory.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application

15/860,502Filed 2 Jan 2018

Priority

DE 10 2011 008 010.46 Jan 2011

Published

10 May 2018

Term ends

Not estimatedThe source records don’t support an estimate.

Classification5 codes

G01F 1/58
By using electric or magnetic effects: by electromagnetic flowmeters
G01F 3/227
For gases: characterised by the means for transfer of membrane movement information to indicating means
G01F 15/046
Using electrical means: involving digital counting
G01F 15/0755
Using electrically-operated integrating means: involving digital counting

Method and apparatus for determining the mass of a fluid flowing through a flow rate meter in a consumption time interval

Life of this patent

Method and apparatus for determining the mass of a fluid flowing through a flow rate meter in a consumption time interval

Life of this patent

Abstract

Claims22