摘要:
A valve positioner system with zero bleed at steady state is disclosed. The system has a pilot valve, the operation of which is controlled by an electronic circuit powered from a signaling and power connection of a positioner device. A plurality of pneumatic valves are activated and deactivated by the pilot valve to control a valve actuator. With varying configurations and arrangements of normally open or normally closed pilot valves and pneumatic valves, fail freeze and fail safe operations are contemplated. The activation and deactivation of the pilot valve is controlled by an electronic circuit that monitors a valve position signal.
摘要:
Disclosed herein are a system and method that integrate vineyard sensor data into an environment that enables analysis, historical trend analytics, spatio-temporal analytics, and weather model fusion for improved decision making from vineyard management to wine production. The integration of new sensor data from multiple soil depths with surface measurements, combined with production flow process and historical information enables new decision making capabilities. A wireless network of sensor/transmitters can be distributed to provide a 3-dimensional assessment of water movement both across the grower's field and as it moves from the surface through the root zone. The soil monitoring data stream feeds into a visualization interface that will be incorporated in software based decision aid and crop management tool that helps agricultural producers reduce costs, minimize water and nutrient applications, and better protect the environment by reducing agricultural production inputs.
摘要:
A method for controlling a valve actuator (2), a valve actuator control device (1) and a valve actuator assembly are disclosed. The method comprises the steps of providing a valve actuator control device, connecting the control device to a valve actuator with a signal transmitting wire (3), and supplying operating power to the valve actuator from the control device. The method further comprises a step of transmitting control signals from the control device to the valve actuator via the signal transmitting wire in order to control the actuator. Hereby, configuration, control and maintenance of valve actuators are facilitated.
摘要:
A plumbing component includes a valve provided within a portion of the plumbing component and configured to control the flow of water through the plumbing component. The valve includes a body and at least one waterway within the body. An electric heater extends through at least a portion of the body of the valve and is configured to heat at least a portion of the body to an elevated temperature sufficient to kill organisms within the waterway.
摘要:
The present application relates to improved valves, especially valves for plumbing fixtures, fittings and water supply systems and installations for washing, showering, bathing and the like employing such plumbing fixtures and fittings, are disclosed herein. The concepts have particular, but not exclusive, application to a mixer valve, especially to a thermostatic mixer valve and, more particularly, to an electronically controlled thermostatic mixer valve. In other embodiments, the concepts may be applied to flow control valves and to applications of such flow control valves in plumbing fixtures and fittings and parts thereof including, for example, a mixer valve.
摘要:
The present application relates to improved valves, especially valves for plumbing fixtures, fittings and water supply systems and installations for washing, showering, bathing and the like employing such plumbing fixtures and fittings, are disclosed herein. The concepts have particular, but not exclusive, application to a mixer valve, especially to a thermostatic mixer valve and, more particularly, to an electronically controlled thermostatic mixer valve. In other embodiments, the concepts may be applied to flow control valves and to applications of such flow control valves in plumbing fixtures and fittings and parts thereof including, for example, a mixer valve.
摘要:
A system including a controller configured to receive feedback from at least one sensor configured to monitor a fluid flow of a hydrocarbon extraction system. The fluid flow includes water and an injected chemical. Additionally, the controller is configured to determine a ratio of the injected chemical to water in the fluid flow.
摘要:
A density measurement system for measuring the density of a material within a region, the density measurement system comprises: a plurality of electrodes arranged around the region; an energisation source arranged to apply an electrical signal to at least one of said electrodes; a monitor arranged to monitor an electrical parameter at at least one of said electrodes, the monitored electrical parameter being caused to change in response to flow of electrical current within the region; and a processor arranged to: generate data indicative of the complex impedance of the material within the region based upon the monitored electrical parameter; and generate data indicative of the density of the material based upon the data indicative of the complex impedance of the material.
摘要:
A method and system for co-ordinating control of a plurality of sensorless devices. Each device includes a communication subsystem and configured to self-detect one or more device properties, the device properties resulting in output having one or more output properties. The method includes: detecting inputs including the one or more device properties of each device, correlating, for each device, the detected one or more device properties to the one or more output properties, and co-ordinating control of each of the devices to operate at least one of their respective device properties to co-ordinate one or more output properties for the combined output to achieve a setpoint. In some example embodiments, the setpoint can be fixed, calculated or externally determined.
摘要:
The present invention relates to a compensation device for setting a flow rate of an infusion solution, a device for automatically controlling the flow rate of the infusion solution, and a method for controlling an optimal target flow rate using a flow rate coefficient of a flow rate controller, the compensation device adjusting a display scale of an infusion solution flow rate controller corresponding to a target flow rate on the basis of a one-time actually measured flow rate in setting the target flow rate by controlling an infusion solution flow rate controller of an infusion solution. More particularly, the present invention relates to a compensation device for setting a flow rate of an infusion solution, a device for automatically controlling the flow rate of the infusion solution, and a method for controlling an optimal target flow rate using a flow rate coefficient of a flow rate controller, the compensation device obtaining a display scale of an infusion solution flow rate controller for a target flow rate after estimating the installation condition of an infusion solution, set through a one-time actually measured flow rate, on the basis of fluctuation information of the flow rate according to change in the installation condition of the infusion solution set and the position of the display scale of the infusion solution flow rate controller, by classifying a factor affecting the flow rate as the position of the display scale of the infusion solution flow rate controller and the installation condition of the infusion solution set.