| Patent application number | Description | Published |
|---|
| 20080289410 | Thermal Mass Flow Meter - The disclosure relates to a thermal mass flow meter for determining a material flow through a vessel. In this case, a heating element is mounted on a holder which is immersed into a vessel with a flowing medium. It is suggested that the holder is subdivided into two zones of differing thermal conductivity, the holder substantially having a high thermal conductivity adjoined by a short zone of low thermal conductivity in which the heating element is arranged. | 11-27-2008 |
| 20080289411 | Thermal mass flow meter and method for its operation - The disclosure relates to a thermal mass flow meter for determining a material flow through a vessel. The mass flow meter has at least two measuring elements immersed into a vessel with a flowing medium, with one of the measuring elements being heated. It is proposed that the heated measuring element is arranged in front of the unheated measuring element in the flow direction of the medium for at least part of the time, and for part of the time the unheated measuring element is arranged in front of the heated measuring element. | 11-27-2008 |
| 20090133573 | METHOD FOR IDENTIFICATION OF THE DRIVE TYPE OF AN ACTUATING DRIVE - The disclosure relates to a method for identification of the drive type of an actuating drive, e.g., a pneumatic actuating drive, having a position regulator in order to control an actuating member in a process installation. The actuating drive is connected by means of an attachment to the position regulator, with the position regulator having control electronics which receive one or more input signals with the aid of a microcontroller and emit actuating signals in order to ventilate or vent the chambers of a single-acting or double-acting pneumatic drive. The position feedback sensor system is equipped with a rotational measurement system. The actuating range of the actuating drive is passed through completely while setting it up. The angle positions signaled back are recorded. The drive type is determined from the range between the limit angle positions at the actuating range limits of the actuating drive. The knowledge that the angle ranges covered by linear-movement drives and pivoting drives differ significantly can be made use of. | 05-28-2009 |
| 20090145291 | METHOD FOR DETECTING THE DRIVE TYPE OF AN ACTUATOR (II) - A method is disclosed for detecting the drive type of an actuator, e.g., a pneumatic actuator, having a positioner for operating a final control element in a process engineering plant. The actuator is connected to the positioner by a mounting set, the positioner comprising an electronic control unit, which uses a microcontroller to receive one or more input signals, and to output actuating signals to control the flow of gas to or from the chambers of a single-acting or double-acting pneumatic drive. The position feedback sensors are equipped with a rotational measuring system. During commissioning of the actuator, the relationship between the drive volumes and the position signal is found and compared with transfer characteristics of known drive types. Where there is a match between the transfer characteristic defined by the value pairs of the given actuator and one of the transfer characteristics of the known drive types, the identified drive type is assigned to the given actuator. | 06-11-2009 |
| 20100147079 | MEASUREMENT DEVICE AND METHOD FOR DIAGNOSIS OF NOISE IN FLUIDIC SYSTEMS - A measurement device and method for diagnosing noise in fluidic systems. A microphone, which is arranged at least partially in the area of the flow medium, compensates for pressure surges in the flow medium. The microphone receives the noise via a membrane and converts it to an electrical signal for evaluation of the noise source by an electronic diagnosis unit. To compensate for pressure surges in the flow medium, the membrane of the microphone is arranged in a housing, which is open on both sides of the membrane and whose two openings have pressure applied to them by the flow medium as a sound source, with at least one of the two openings being provided, in order to detect noise, with filter means for attenuation and/or time delay of frequencies which are in an expected noise spectrum, while the filter means allows lower frequencies produced by the pressure fluctuations in the flow medium to pass through. | 06-17-2010 |
| 20100147395 | METHOD FOR DETERMINING THE PATH AND PRESSURE WEAR CONDITION OF A VALVE MECHANISM AND VALVE ARRANGEMENT USING SUCH A VALVE - A method for sensor operating-state determination of a valve arrangement to control a process medium flow through a pipeline having a valve element, arranged such that it can move axially within a valve housing via a pneumatic actuating drive by application of control pressure, with the control pressure being measured and evaluated in order to determine the sliding friction during the movement. The valve element can be moved at a constant speed over at least a subarea of the travel movement, the value of which speed is measured via a position sensor system for signal processing, with the currently applied control pressure being measured at approximately the same time for signal processing via a pressure sensor system. The current sliding friction of the valve element can be determined as a measure of wear state from both measured values, by an electronic evaluation unit, based on a proportional drive force expressed by the control pressure which occurs when the valve element is traveling at a constant speed. | 06-17-2010 |
| 20100152907 | METHOD FOR PRESSURE-SENSOR WEAR STATE DETERMINATION OF A VALVE MECHANISM - A method and a valve arrangement are disclosed for pressure-sensor diagnosis of an operating state of a valve arrangement for controlling a process medium flow, in which a valve element, which is arranged such that it can move axially within a valve housing, is moved by application of control pressure, with the control pressure being determined in the starting and/or stopped phase of the valve element in order to determine static friction. A pressure rise value of control pressure required to start movement of the valve element is measured repeatedly and successively after the movement of the valve element has been stopped. The measured pressure rise values are temporarily stored in a memory unit. A diagnosis unit accesses the pressure rise values in order to determine a probable influence of the static friction on the movement of the valve element, by statistical analysis. | 06-17-2010 |
| 20100152908 | METHOD FOR DIAGNOSING THE STATE OF WEAR OF A VALVE ARRANGEMENT FOR CONTROLLING THE FLOW OF A PROCESS MEDIUM - A method and valve arrangement are provided for controlling the flow of a process medium through a pipeline. A pneumatic actuator moves a valve element, which is accommodated in a valve housing, and switches the flow of the process medium, in accordance with a positioning control system by means of a control piston, to at least one side of which control pressure is applied in a drive chamber. An electronic evaluation unit connected to the positioning control system monitors the operating state. A pressure sensor measures the pressure in the drive chamber, and the evaluation unit analyzes the measured pressure value with respect to a pressure p and the pressure change dp(t) over time to determine the flow into/from the drive chamber and/or the ratio (V/A) of the drive chamber volume to the effective opening cross section of the valve arrangement as a measure of the operating state of the valve arrangement. | 06-17-2010 |
| 20100179697 | METHOD FOR POSITION-DEPENDENT ELECTRONIC WEAR STATE DETERMINATION OF A VALVE MECHANISM, AND A PNEUMATIC VALVE - A method and a valve arrangement are provided for electronic wear state determination of the valve arrangement for controlling a process medium flow. A valve element, which is arranged so as to move axially within a valve housing, is moved via electrically drivable linear drive means on the basis of positioning regulation. The valve element has an essentially constant drive force applied to it, and a position speed profile over the switching travel of the valve element is determined by detecting the speed as a function of the current position of the valve element. A change profile is created by comparing the determined speed profile with previous position speed profiles, as a measure of the position-dependent wear state of the valve mechanism. | 07-15-2010 |
| 20100305874 | ELECTRONIC WEAR STATE DETERMINATION IN A VALVE ARRANGEMENT - A method is provided for determining the electronic wear state of a valve arrangement for controlling a process medium flow. A valve element is arranged to move axially within a valve housing, is reset by a spring, and is moved by application of control pressure via an I/P converter. The I/P converter ensures a constant opening cross section at least over a portion of the switching stroke, in the case of which the time at which various positions of the valve element along the ventilating and/or venting distance are reached is determined by means of a position sensor system, and this time is used to mathematically derive the speeds of the valve element prevailing at these positions by means of an evaluation unit. The change profile of the speeds represents a measure of the wear state of the valve mechanism. | 12-02-2010 |
| 20110132064 | FLOWMETERS AND METHODS FOR DIAGNOSIS OF SENSOR UNITS - A method and an apparatus for diagnosis of a flowmeter are disclosed. The method includes thermally coupling a first sensor unit of the flowmeter to a fluid and thermally coupling a second sensor unit of the flowmeter to the fluid. The method also includes actively heating or cooling the first sensor unit by applying power to the first sensor unit such that its temperature is different from the temperature of the fluid, and simultaneously actively heating or cooling the second sensor unit by applying power to the second sensor unit such that its temperature is different from the temperature of the fluid, and typically from the temperature of the first sensor. The method can include determining a temperature TM | 06-09-2011 |
| 20110283787 | THERMAL MASS FLOWMETER WITH A METAL-ENCAPSULATED SENSOR SYSTEM - A thermal mass flowmeter with a metal-encapsulated sensor system is provided. The sensor system included at least one heating resistor having a platelet geometry, and a sensor cap surrounding the at least one heating resistor. At least one distal end area of the sensor cap is formed with a flat rectangular cross section corresponding to the platelet geometry of the heating resistor, such that the distal end area of the sensor cap surrounds the heating resistor closely with an accurate fit (e.g., with a predetermined gap therebetween). | 11-24-2011 |
| 20130022075 | TEMPERATURE SENSOR HAVING MEANS FOR IN-SITU CALIBRATION - A temperature sensor is disclosed as having a resistance thermocouple, accommodated in a sensor housing, for detecting a process temperature. The thermocouple can be connected via a multipole electric line to an electronic temperature transmitter for measured-value conditioning, the resistance thermocouple being equipped for in-situ calibration with a Johnson noise thermometer for determination of a reference temperature. | 01-24-2013 |
