A phase power device, comprising: a circulation pipe (1) and a preset number of phase power control components (2), wherein the circulation pipe (1) is used to provide a channel for fluid circulation flow, and the preset number of phase power control components (2) are disposed on the circulation pipe (1) and used to drive fluid in the circulation pipe (1) to circulate and flow. Further provided is a fluid experiment system, comprising the phase power device. The phase power device and the fluid experiment system may enable the fluid to meet a set flow requirement during the experiment, thus reducing the use of auxiliary equipment, and reducing experiment costs.

A fluid sensing device is provided, including a main body and a light sensing unit. The main body includes a casing and a rotary member. A containing chamber is formed in the casing. The rotary member is rotatably disposed in the casing, and the rotary member has at least one transparent portion. A fluid flows into the containing chamber to drive the rotary member rotating around a central axis. The light sensing unit includes a first light transceiver module and a second light transceiver module disposed near the main body in an asymmetrical manner with respect to the central axis to transmit and receive the light passing through the translucent portion.

The invention relates to a boundary layer probe for determining a fluid flow, comprising a measuring surface which is formed on a probe wall and with which a fluid flow to be determined is in contact during a measuring operation. The boundary layer probe also comprises an assembly of measuring obstacles that are formed in the region of the measuring surface as obstacles which disrupt the fluid flow in a flow region adjacent to the measuring surface, each of which has an elongated obstacle course extending over a particular obstacle length, and which are arranged at substantially equidistant angular distances in the circumferential direction. The boundary layer probe additionally has pressure measuring points, each of which is radially adjacent to an associated obstacle in order to detect a local pressure in the region of the measuring surface. The invention additionally relates to a measuring assembly and to a method for determining a fluid flow.

A power supply control device of a nitrogen gas generator includes: a pipe having a nitrogen gas inlet for receiving input of nitrogen gas from a nitrogen gas generator that compresses air by a compressor to separate the nitrogen gas from the air, and a nitrogen gas outlet for outputting, to outside, the nitrogen gas received by the nitrogen gas inlet; a pressure gauge that measures pressure inside the pipe; a flowmeter that measures a flow rate of the nitrogen gas flowing inside the pipe; and a control unit that controls supply of power to the compressor and shut-off of the supply of the power in accordance with a measurement result of at least one of the pressure gauge and the flowmeter.

A fluid sensing device is provided, including a main body and a light sensing unit. The main body includes a casing and a rotary member. A containing chamber is formed in the casing. The rotary member is rotatably disposed in the casing, and the rotary member has at least one transparent portion. A fluid flows into the containing chamber to drive the rotary member rotating around a central axis. The light sensing unit includes a first light transceiver module and a second light transceiver module disposed near the main body in an asymmetrical manner with respect to the central axis to transmit and receive the light passing through the translucent portion.

A flow sensor module employs a fitting which defines an offset sensor bypass which is disposed at an acute angle to a linear flow path through the fitting. A dynamic pressure or flow sensor is disposed in the sensor bypass. A bonnet assembly is removably mounted to the fitting and mounts the sensor and fluidly seals the sensor in the fitting. A solid state controller has a panel which indicates a number of operational conditions including whether there is fluid flow through the flow system. The panel may have a chemical feed pump default indicator, a control valve indicator and an air trap device indicator and, in one embodiment, a manual override switch to turn on a feed pump, a control valve, an air trap device or an electrically operated device.

The present invention provides a new and unique apparatus featuring a signal processor or processing module configured to: receive signaling containing information about a fluid flow passing through a pipe that is channelized causing flow variations in the fluid flow; and determine corresponding signaling containing information about a fluid flow characteristic of the fluid flow that depends on the flow variations caused in the fluid flow channelized, based upon the signaling received. The signal processor or processing module may be configured to provide the corresponding signaling, including where the corresponding signaling contains information about the fluid flow characteristic of the fluid flow channelized.

A method for determining a mass flow composed of bulk material, in particular grain, which is conveyed by means of a continuous, circulating conveyor, having planar conveyor elements, from a lower bulk material receiving area to a higher bulk material delivery area, in which the bulk material delivered by the conveyor is deflected by a guide surface disposed in the bulk material delivery area toward a measuring device, wherein the mass flow is determined by the measurement of a resulting force (F_G) exerted on a sensor surface of the measuring device, wherein at least two parameters having an effect on the force measurement, in particular parameters independent of bulk material properties, are compensated for. A control and regulating device for executing the method for determining a mass flow composed of bulk material is also provided.

A measuring device is provided for measuring a mass flow composed of bulk material, in particular grain, in a continuous, circulating conveyor enclosed in part by a housing, having planar conveyor elements, which conveys the bulk material from a lower bulk material receiving area to a higher bulk material delivery area. A substantially circular movement course is imposed on the bulk material delivered by the respective conveyor element in a substantially radial direction of an inner surface of a cover section of the housing by a guide surface formed in the upper region of the conveyor. The bulk material is deflectable toward a sensor surface of the measuring device. At least the sensor surface of the measuring device is disposed in the upper region of the conveyor such that there is a tangential course in the transition from the guide surface to the sensor surface.

A small and light-weight flowmeter realizes the compensation of a zero point drift. A mass flowmeter includes: a centrifugal force/centripetal force detection strain gauge adhered to a part acted upon by a centrifugal force or a centripetal force of fluid in a pipe line in which the fluid flows and a flow rate zero point drift compensation strain gauge adhered to a position different from that of the centrifugal force/centripetal force detection strain gauge. A pulse wave propagation time between the two points is used to compensate a zero point drift of a flow rate.