Patent application number | Description | Published |
20080257054 | Differential Pressure Measuring Transducer Unit - The disclosure relates to a differential pressure transducer unit comprising an over-load protection system which is used to measure low differential pressure in liquids and gases under high static pressure load which can be connected to flanges on the working pressure lines. The differential pressure transducer unit consists of a planar multi-layered arrangement comprising layers which are conductive, insulating and which are insulated from each other, whereby the insulating and conductive layers comprises recesses which at least partially cover each other, wherein the measuring mechanism and the measuring value processing means are accommodated. At least one of the layers is a functional component of the over-load protection system. | 10-23-2008 |
20080257428 | ACTUATING DRIVE - The disclosure relates to an actuating drive for control of an actuating element for automation in process installations. An exemplary actuating device drive for control of an actuating element comprising: a position detection device configured for detection of an actual position of the actuating element; a regulator unit configured for operational connection with the position detection device for comparison of an actual position with a predeterminable set position and for production of an actuating signal for driving the actuating drive, wherein the position detection device has a pattern support, at least part of whose surface is covered by a pattern which can be scanned optically; and a stationary optical scanning device, whose optical axis is aligned with the pattern. | 10-23-2008 |
20080277608 | Method for operation of an actuating drive - An exemplary method is disclosed for operation of an actuating drive for control of an actuating element, which has an associated position detection device for detection of an actual position of the actuating element, which detection device is operatively connected to a regulator unit for comparison of the actual position with a predeterminable set position and for production of an actuating signal for driving the actuating drive, with the position detection device having a stationary optical scanning device whose optical axis is directed at an endless pattern which can be scanned optically and has associated numerical equivalents. The method includes: while setting up the actuating drive, moving the actuating element to a first limit position, and associating an instantaneous pattern at a focus of a scanning device with an actual position of the first limit position; moving the actuating element to a second limit position, and associating the instantaneous pattern at the focus of the scanning device with an actual position of the second limit position; and comparing numerical equivalents of the instantaneous patterns identified at the first and second limit positions with one another | 11-13-2008 |
20080307889 | Pressure Transponder With Surface Accoustic Wave Sensor - The invention relates to a pressure sensor, the measuring cell of which is provided with at least one membrane for the protection of the pressure-sensitive element and a measuring chamber, filled with pressure medium, in which the pressure-sensitive element is housed. According to the invention, the membrane is monitored for damage, whereby at least one surface wave sensor is arranged in the chamber filled with pressure medium. On damage to the membrane occurring, process medium is mixed with the pressure medium. A substance change in the sensitive region of the surface wave sensor is thus brought about which results in a differing signal run time. Any change in run time is an indictor of damage to the pressure sensor and may be signaled as such. | 12-18-2008 |
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 |
20090150107 | METHOD FOR COMMISSIONING ACTUATORS - The disclosure relates to a method for commissioning pneumatically operated actuators that are controlled by a positioner. To determine the drive type, a constant flow of pneumatic fluid is applied to the actuator during commissioning while a drive-specific characteristic curve of the fed back position is recorded over time. Then the measured characteristic curve is compared with a given specimen characteristic curve. The drive type is inferred from the level of difference or agreement between the drive-specific characteristic curve and the specimen characteristic curve. | 06-11-2009 |
20100161279 | METHOD FOR DIAGNOSIS OF ACTUATORS - A method is disclosed for diagnosis of actuators which are operated with the aid of a positioning device as a function of a nominal value preset, which is emitted from a superordinate regulation device and is received via a communication interface. Diagnosis information can be determined from a time profile of the nominal value preset by investigating the profile of the nominal value for one or more known characteristics. | 06-24-2010 |
20110015792 | METHOD FOR IDENTIFICATION OF PNEUMATIC DRIVES - The disclosure relates to a system and method for identification of pneumatic drives. The pneumatic actuating drive is controlled by an electro-pneumatic position regulator, which is equipped with a microcontroller, at least one electro-pneumatic transducer for controlling the pressure-medium flow to and from the drive, and a communication interface. After the position regulator has been started up with an initial setting, a nominal value profile and an actual value profile can be analyzed during operation and, if a control error exceeds a predeterminable minimum value, the manipulated variable from the position regulator can be temporarily replaced by a test signal during which operating parameters of the controlled system are recorded from which current regulator parameters are determined. | 01-20-2011 |
20120181463 | SHUT-OFF VALVE - A shut-off fitting is disclosed for use, for example, in a pipeline of a technical installation with a servo drive. The servo drive can be connected to a control device having a position controller and a signal conditioner device. The position controller can have an analog control input for connecting a process control signal and a binary control input for actuating the servo drive in accordance with a predeterminable speed characteristic. The signal conditioner device can have a feed voltage input, an analog control output, a binary control output, and an energy store. | 07-19-2012 |