30results about "Pneumatic programme control" patented technology

A position control system is used for controlling a fluid operated cylinder having at least one fluid chamber defined by a piston located within a housing for movement between first and second end limits of travel. The system includes at least two electrically actuated proportional flow control valves connected to each port of the cylinder for selectively and proportionally controlling fluid flow into and out of the at least one chamber. At least one pressure sensor is provided for measuring fluid pressure with respect to each chamber. At least one discrete position sensor is located adjacent a midpoint of the cylinder for sensing a discrete centered position of the piston. A controller includes a program and is operably connected for controlling actuation of the at least two valves in response to pressure measured by the at least one pressure sensor and location measured by the at least one position sensor.

A dynamically balanced pneumatic relay amplifier and a current-to-pneumatic converter are disclosed. The relay has a balance plug, a supply plug positioned on top of the balance plug, a bead chain connecting the balance plug and the supply plug, and a vent plug positioned on top of the supply plug. The relay also includes a baffle positioned on top of the vent plug. The converter, used in an electro-pneumatic positioner, comprises a flat strip made of magnetic material located in proximity to a nozzle, and a flow regulator having a flat spring securing a plug in a seat within the regulator. The converter also includes a cantilevered flexure integrally secured to a molded spring support, a first bias spring positioned on a first side of the flexure, and a second bias spring positioned on a second side of the flexure. The thickness of the flexure is locally reduced in an area not integrated into the molded spring support.

A control system for a pneumatic transport system of granular material, which includes a plurality of containers, is configured to manage the filling cycle of each container automatically by monitoring the weight of the transported material continuously, and by optionally monitoring the state of the granular material, for example temperature and humidity of the granular material. The information generated by the control system is provided to a centralized management system, which may be operated entirely or partially through radio signals transmitted by wireless technology.

The invention describes a displacement unit (1) for example for supply, manipulation, guiding or control systems of mounting parts (2), with components (3, 4) that can be adjusted relative to one another by means of a drive unit (5) and with at least one guiding device (6) for at least one of the components (3; 4) and a control unit (7). At least one member (8) of the control unit (7) used for processing logic information or bus information is integrated into the drive unit (5) and/or into at least one of the components (3; 4) and/or is mounted on one of the components (3; 4).

A smart valve positioner is provided with a local user interface with non-mechanical touch buttons and a display inside a positioner housing under a housing cover for locally operating the valve positioner. The touch buttons are user-operable by touching the touch buttons when the housing cover is open. The housing cover is arranged to make the touch buttons user-operable from outside the housing by touching the housing cover, when the housing cover is closed.

The circuit of the invention provides protection for both a spur circuit and the network while allowing other spurs on the network to continue operation and is applicable to any type of fieldbus network including both FF and ASi type networks. A control circuit monitors a current limiter coupled to each spur circuit. If the spur circuit goes into an overcurrent condition for a preset period of time, the control circuit turns it off. After a second period of time has elapsed, the control circuit turns the current limiter back on permitting current to flow in the spur once again while continuing to monitor the current limiter.

A method for processing operating data (e.g., position, setpoint, and pressure) for a valve assembly. The method is configured to associate characteristics of operation for the valve assembly with a root cause and/or a contributing factor. In one embodiment, the method can assign a first amplitude with a value that quantifies movement or “jump” of the valve stem that results from stick-slip on the valve assembly. The method can also assign a second amplitude with a value that quantifies a change in the data for the setpoint. The method can further ascertain the relationship or “position” of the first amplitude relative to the second amplitude, or vice versa. The method can use the relationship between the first amplitude and the second amplitude to indicate the root cause of the operation of the valve assembly.

The invention discloses an air path control system of a vacuum absorption platform. The air path control system of the vacuum absorption platform comprises a vacuum absorption workbench, a first air division seat, a direct current valve, a first vortex air pump, a second air division seat, a pressure regulating filter, a flue gas purification cover, a second vortex air pump and an electromagnetic valve. The vacuum absorption workbench, the first air division seat, the direct current valve, the first vortex air pump, the second air division seat, the pressure regulating filter, the flue gas purification cover and the second vortex air pump are sequentially connected in series through a plurality of air pipes. The two ends of the electromagnetic valve are connected with the first air division seat and the pressure regulating filter respectively. In the time of processing, the vacuum absorption workbench is in a negative pressure state. After materials are processed, air blown from the first vortex air pump enters the vacuum absorption workbench from the electromagnetic valve. The problem that after processing by an etching rack is finished, materials are difficult to take out under the influences of negative pressure is solved.

Example methods and apparatus to couple an electro-pneumatic controller to a position transmitter in a process control system are disclosed. A disclosed example apparatus includes a position transmitter having a first connection and having a second connection coupled to a power source, an electro-pneumatic controller including at least a first connection coupled to the first connection of the position transmitter, and a resistor coupled between the first connection and a second connection of the electro-pneumatic controller.

An amusement park attraction includes an attraction feature. The attraction feature includes a fluid actuator having an inflatable mass, the inflatable mass being fluidly connected to a source of pressurized fluid to enable inflation of the inflatable mass. Fluid control devices are configured to adjust inflation of the inflatable mass, and sensors are configured to monitor state properties of the fluid actuator. A controller is communicatively coupled to the fluid control devices and the sensors. The controller is configured to controllably inflate the inflatable mass based at least on feedback from the sensors to cause the fluid actuator to impact an object. The controller is configured to control the inflation of the inflatable mass to adjust parameters of the fluid actuator to maintain a force exerted by the fluid actuator on the object to within a predetermined range.

The present invention relates to a table ball X-Y path pneumatic control device, belonging to the field of machinery technology. Said invention includes data acquisition card, computer, platform support, platform, small ball, touch screen device, potentiometer and platform servo device. Besides, said invention also provides their connection mode, working principle of said table ball X-Y path pneumatic control device and its concrete application method.

The invention discloses a full-pneumatic accident driving system for metallurgical production equipment, which is high in safety performance and convenient to control. The driving system comprises a pneumatic control cabinet, a power output mechanism connected with the former, and a power transmission mechanism connected with a power output end of the power output mechanism, wherein the control cabinet controls performance time sequences of all devices of the power transmission mechanism, and the power output device adopts a pneumatic motor. The driving system adopts a compressed air source as the sole power source; all pneumatic devices are reasonably and orderly controlled by the pneumatic cabinet, as a result, the reliability and safety of the system are improved at a lower cost.

The invention concerns a method for controlling a mechanism (10) displaying asymmetrical behaviour, the mechanism (10) comprising a first operating direction (F+) and a second operating direction (F-), the control method making it possible to generate, using a control module (24) of a computer (20), a control signal (x_com) from a setpoint signal (x_cons), in which - when the setpoint signal (x_cons) indicates that the mechanism (10) should be operated in the first direction (F+), the control module (24) applies a first corrector (100) to the setpoint signal (x_cons) in order to generate a control signal (x_com), - when the setpoint signal (x_cons) indicates that the mechanism (10) should be operated in the second direction (F-), the control module (24) applies a second corrector (100) to the setpoint signal (x_cons) in order to generate a control signal (x_com), and in which the first and second correctors (100, 200) have different parameters (Kp1, Kp2, Ti1, Ti2), in order to compensate for the asymmetrical behaviour of the mechanism (10).

A stick slip detection system includes: an operation data storage unit configured to store a stick slip index, the stick slip index being a ratio of a first state amount based on a displacement of a valve shaft of a valve to be diagnosed to a second state amount based on the displacement; an abnormality diagnosis unit configured to determine whether a stick slip phenomenon occurs in the diagnosis target based on the stick slip index; and a diagnosis operation control unit configured to, when a stepwise change in a control command value in an intermediate opening degree of the valve to be diagnosed is detected, stop a determination operation of the abnormality diagnosis unit. The present disclosure makes it possible to easily reflect knowledge of an expert with respect to a diagnosis target such as a valve in the stick slip detection system and method.

A valve actuator control device adapted to control the position of a valve actuator by means of solenoid valves, in which if the actuator position deviates from a desired position, but remains within a predetermined distance from said desired position, the control device is adapted to only return the actuator to the desired position after a delay period, thereby to increase the life span of said solenoid valves.

The pneumatic solar tracking system for solar panels adjusts the angular orientation of a solar panel to maximize exposure of an upper surface of the solar panel to incident solar radiation from the sun as the sun moves across the sky. The pneumatic solar tracking system includes a base and a platform supported above the base. The platform has an opening formed therein. A plurality of pneumatic actuators are supported on the base beneath the opening formed in the platform. The solar panel is supported on an upper surface of the platform, and a plurality of pivotal connectors pivotally connect the lower surface of the solar panel to respective pistons of the plurality of pneumatic actuators. Each of the pivotal connectors pivots along at least two orthogonal axes. An optical sensor is provided for detecting and tracking the angular position of the sun.

A process device control may use a combination of a characteristic curve for the device and a proportional, integral and derivative signal value. The characteristic curve for the device may define operational characteristics of the process device. The proportional, integral and derivative signal value may be representative of process device operational deviations from the characteristic curve.