Endress + Hauser Flowtec Ag

Martin Arnold

Anastasios Badarlis

Alexander Grün

Stephan Gaberthüel

Tobias Baur

Martin Barth

Hanno Schultheis

Oliver Popp

Lars Neyerlin

Axel Pfau

Michel Wagner

Mathieu Habert

Fanos Christodoulou

A method for producing a probe of a thermal flowmeter for measuring mass flow of a medium in a measuring tube, wherein a probe core is provided arranged loosely in a probe sleeve having a longitudinal axis, wherein the probe sleeve is deformed relative to the longitudinal axis completely radially in the direction of the probe core by means of high energy rate forming, wherein a material-locking connection between probe sleeve and probe core results and a rod is formed, wherein the rod represents a base body that is used for probe production, wherein a deformation speed reaches values greater than 100 m/s, and wherein the high energy rate forming includes explosive forming or magnetic forming.

Method for producing a probe of a thermal flowmeter, probe of a thermal flowmeter, and thermal flowmeter

The present disclosure relates to a method for producing a probe of a thermal flow meter for measuring the mass flow rate of a medium in a measuring tube, the method having the following steps: introducing a probe core in the form of a material to be melted into a first probe casing, the first probe casing having an open first end and a closed second end facing away from the first end; melting the probe core; quenching the probe core to a temperature below the solidification temperature; attaching a thermoelement to a contact surface of the solidified probe core. The invention also relates to a probe obtained according to the production method and to a flow meter including the probes according to the present disclosure.

Method for producing a sensing element for a thermal flow meter, sensing element and flow meter

The present disclosure relates to a method for manufacturing a probe of a thermal, flow measuring device for measuring mass flow of a liquid in a measuring tube, wherein the method includes: introducing a probe core including a hard solder and a core element into a first probe sleeve, wherein the first probe sleeve has an open first end and a closed second end away from the first end; melting the hard solder; affixing the core element by cooling the hard solder to a temperature less than the solidification temperature; and applying a thermoelement to a contact area of the core element or of the solidified hard solder. The present disclosure relates, furthermore, to a probe resulting from the manufacturing process as well as to a flow measuring device having at least one probe of the-present disclosure.

Thermal flow measuring device including probe having probe core with hard solder

A thermal flow measuring device for determining and/or monitoring the mass flow and/or the flow velocity of a flowable medium through a pipeline, comprising at least three sensor elements and an electronics unit. Each sensor element is in thermal contact with the medium, and includes a heatable temperature sensor. The electronics unit is embodied to heat each of the three sensor elements with a heating power, to register their temperatures, to heat at least two of the at least three sensor elements simultaneously, to ascertain the mass flow and/or the flow velocity of the medium, from a pairwise comparison of the temperatures and/or heating powers and/or at least one variable derived from at least one of the temperatures and/or heating powers, to provide information concerning a change of the thermal resistance of at least one of the at least three sensor elements, from a response to an abrupt change of the heating power supplied to at least one of the at least three sensor elements, to provide information concerning a change of the inner thermal resistance of the at least one sensor element, and in the case that a change of the inner and/or outer thermal resistance occurs in the case of at least one of the at least three sensor elements, to perform a correction of the measured value for the mass flow and/or the flow velocity and/or to generate and to output a report concerning the state of the at least one sensor element mass flow and/or the flow velocity.

Thermal, flow measuring device with diagnostic function

A thermal, flow measuring device and method for measuring the flow of a measured medium. During a heating phase of predetermined length a constant heating current of a first electrical current source flows through a first resistor. During a first measuring phase of predetermined length a constant measurement current of a second electrical current source flows through the first resistor. During the first measuring phase a first voltage falls across the first resistor, wherein during a second measuring phase of predetermined length during the first measuring cycle the constant measurement current of the second electrical current source flows through a second resistor. During the second measuring phase a second voltage falls across the second resistor, wherein during the heating phase the constant heating current of the first electrical current source flows through a shunt resistor, wherein during the heating phase a fifth voltage falls across the shunt resistor, wherein at least the first voltage, the second voltage and the fifth voltage are utilized for calculating the flow and wherein during the first measuring phase the constant heating current of the first electrical current source flows through a bypass resistor.

Growing community of inventors

Reinach, Switzerland

Martin Arnold