Abstract:
Methods and apparatus to monitor and/or control a pneumatic actuator are disclosed. An example apparatus includes a processor to execute a control application, a position sensor to monitor a position of a valve coupled to a pneumatic actuator, the position sensor to provide position information of the valve to the control application, and a latching valve to provide a pneumatic signal to the actuator, the latching valve and the pneumatic signal to be controlled by the control application based on at least one of the position information or a control signal from a separate device in a process control system.
Abstract:
Die Erfindung betrifft eine Kolben-Zylinder-Anordnung, insbesondere für pneumatische, hydraulische oder mechatronische Systeme, mit einem Zylindergehäuse (3), und einem Kolben (11), der mit einer Kolbenstange gekoppelt, in einem Zylindergehäuse (3) angeordnet und dort entlang einer Längsachse beweglich angeordnet ist. Erfindungsgemäß ist eine Messeinrichtung (27) innerhalb des Zylindergehäuses (3) angeordnet.
Abstract:
In a measurement system for sensing the position of a piston (6) capable of moving within a cylinder (1) to which a pressure may be applied, a position transmitter (11), for example a magnet, is linked to the piston (6) inside the cylinder (1), and a sensor (12) that may be driven outside the cylinder (1) by a drive (13, 14) along the path of displacement of the position transmitter (11) senses a signal intensity depending on its distance from the position transmitter (11). The sensor (12) is driven by a regulator (17) in such a way that it presents a maximum signal intensity. By detecting the position of the sensor (12), the position of the position transmitter (11) may be deducted.
Abstract:
Position detection system for a body which changes position, comprising a series of markings made at a mutual distance from one another and a scanner unit, which is movable with respect to said series of markings, for scanning said markings, the series of markings or the scanner unit being connected to the body, the markings (7) being made in various groups of a predetermined number of adjacent markings in the series, the markings per group always being made in a sequence such that said sequence belongs to only one group.
Abstract:
A device for mounting a position detecting sensor for detecting a stroke of a cylinder. It has such an arrangement that a rotary angle of a magnetic sensor (1) is regulated to within +/-5 degrees by a slit (9) formed in a housing (2) mounted thereon with the magnetic sensor (1) and a rotation-locker (7) mounted on a cover (6), the slit (9) allows the housing (2) and the cover (6) to slide on each other, but does not allow the both members to fall off each other, and the cover (6) and a head (4) are aligned with each other by a knock pin (10). With this arrangement, assembling work and highly accurate positioning can be easily performed. Furthermore, according to the present invention, a slit (21) is provided in the top portion of the sensor (1), the position of which can be adjusted by a collar (16) driven thereinto with a pin (17), after the adjusting, the sensor (1) is mechanically pressed by a cover (22) to be fixed or fixed by a mold material, so that an output of the sensor (1) can be controlled to be in an optimal state. Further, a block (20) mounted thereon with the sensor (1) is adjustably installed on a cylinder head (23), the sensor can be set to the position of a magnetic scale with ease, and the sensor (1) and the block (20) can be easily replaced with new ones.
Abstract:
In some applications, a piston of a hydraulic actuator may move at high speeds, and large undesired forces may be generated if the piston reaches an end-stop of the hydraulic actuator at a high speed. The undesired forces may, for example, cause mechanical damage in the hydraulic actuator. A controller may receive information indicative of the piston reaching a first position at a first threshold distance from the end-stop, and, in response, may modify a signal to a valve assembly controlling flow of hydraulic fluid to and from the hydraulic actuator. Further, the controller may receive information indicative of the piston reaching a second position at a second threshold distance closer to the end-stop of the hydraulic actuator, and, in response, the controller may further modify the signal to the valve assembly so as to apply a force on the piston in a away from the end-stop.
Abstract:
Pressure piston actuators and systems for control of wastegate in a turbocharger pressure that include the pressure piston actuators are disclosed. The pressure piston actuator includes a housing defining a chamber and a pathway leading to the chamber, a piston disposed within the chamber, a rod connected to the piston by a ball-and-socket joint, and a spring disposed in the chamber to bias the piston, and hence the rod, into a retracted position. Then, when fluid is introduced into the chamber, the fluid applies pressure to the piston. Once the pressure overcomes the bias of the spring, the piston, and hence the rod, moves into an extended position. For the system, the pressure piston actuator has the connector on the end of the rod opposite the ball-and-socket joint connected to the valve portion of a wastegate of a turbocharger.
Abstract:
Apparatus and method for integrating an actuator into turbo-machinery and operating the actuator based on process fluid associated with the turbo-machinery. The integrated actuator mechanism (204) includes an actuator casing; a balance drum (218), with labyrinth seals (214), and recovery spring (212), configured to apply force to the balance drum, in the actuator casing; an actuation bar (206) connected to the balance drum and configured to move linearly in the direction of the balance drum; and a connection mechanism connecting a diverted portion of turbo-machinery process fluid to the actuator casing for applying force, in an opposite direction of the spring force, to the balance drum. The labyrinth seals allow the diverted turbo-machinery process fluid to bleed through and return to the turbo-machinery.