摘要:
A method, for use in connection with installing a cable into a conduit (4) having a first end and a second end (12), of detecting whether air is flowing from the first end to the second end, the method including the steps of: - providing a movement sensor (10) within or proximate to the conduit; - providing an air flow (14) into the conduit from the first end; and - detecting that the air is flowing to the second end when the air flow disrupts the movement sensor.
摘要:
The present invention relates to a meter register having an encoder for measuring material flow. According to the invention, the meter register comprises a register body having a rotatable drive shaft coupled thereto, a drive magnet attached to the drive shaft, at least one wheel co-acting with the drive shaft, the wheel having a first surface and an opposite second surface, and a reflective surface and a non-reflective surface on the second surface of the wheel. Using a plurality of optical emitters and a sensor adapted to co-act with reflected radiation from the reflective surface, a determination of flow through the meter and direction of flow can be established.
摘要:
A method, for use in connection with installing a cable into a conduit (4) having a first end and a second end (12), of detecting whether air is flowing from the first end to the second end, the method including the steps of: - providing a movement sensor (10) within or proximate to the conduit; - providing an air flow (14) into the conduit from the first end; and - detecting that the air is flowing to the second end when the air flow disrupts the movement sensor.
摘要:
A device 1 for measuring a fluid flow FF velocity and direction comprises : - a pivotable means 2 adapted to rotate at a pivotable means rotation velocity and direction depending on the fluid flow velocity and direction when in contact with the fluid flow, - a modulator 3 coupled to the pivotable means and adapted to rotate in conjunction with the pivotable means, - a fiber optical arrangement for providing an incident beam IB to the modulator and for receiving a return beam RB from the modulator, - the incident beam IB comprising an incident signal, the return beam RB comprising a modulated signal, the modulator 3 modulating the incident signal so as to form the modulated signal depending on the pivotable means 2 rotation velocity and direction. The modulator 3 comprises an encoder 30 comprising at least a first angular sector 34, a second angular sector 35 and a third angular sector 36, each angular sector having a determined attenuation coefficient so that the modulated signal comprises at least a first portion 64, a second portion 65 and a third portion 66 for each complete rotation of the encoder 30. The device 1 further comprises a processing means 6 for determining the fluid flow FF velocity and direction based on at least the first portion 64, the second portion 65 and the third portion 66 of the modulated signal.
摘要:
The flow meter proposed has a helical-design deflector located in a substantially cylindrical inner housing (1), the deflector imparting a swirling motion to the fluid flowing through the inner housing. Rotatably mounted downstream of the deflector is a rotor (8) with blades (13) extending outwards from its axis of rotation (9) and with a ring (14), coaxial with the axis of rotation of the rotor, joining the blade ends to each other. The action of the moving fluid on the rotor blades (13) causes the rotor (8) to turn. Located in a circle on the outside surface (15) of the ring (14) are a multiplicity of markings (16) spaced the same angular distance apart. A beam of light passes through a window (18) in the wall of the inner housing (1) and shines on the outside surface (15) of the ring (14) with its markings (16). When the rotor (8) is rotating, images of the successive markings passing are transmitted along a fiber-optic cable (20) to a detection sensor (21), enabling the flow rate to be determined from the signals thus obtained. The flow meter has the advantage that the fluid whose rate of flow is to be measured does not have to be transparent as it has to be when a photo-electric flow meter is used, and the use of a large number of markings enables the measurement accuracy to be increased.
摘要:
A flowmeter for gases, comprising a rotor (11) between two stators (3,3′) which consist of deflection blades, optical means being provided to detect the rotation of the rotor and convert it into an electrical output signal. Each of the detector blades of the stators has a curved course between an inflow edge (7), where the blade face from the hub (9) to the periphery runs substantially axially, and an outflow edge (8), where the blade forms an angle with the axial direction which angle depends on the distance from the hub. Preferably the blade face is at least partially (18) formed by a circular cylindrical face (15/17), the central axis (14/14′) of said cylinder intersecting the central axis (12) of the stator at an angle differing from 90° at such a distance that the central axis of the stator lies in a tangent plane to the cylinder, and a flat face part (22), passing through the central axis (12) of the stator, connects to the circular cylindrical part (18) of the stator face up to the inflow edge (7), the axial measurement of said flat face part (22) decreasing from the hub (9) to the peripheral edge (4). The flowmeter can be cast and presents an excellent reproducibility of its features between individual units, in the two positions, and it has a great dynamic range.
摘要:
Coolant flow (900) in the core (103) of a natural circulation boiling water reactor (100) is monitored by making use of a detector (208) for nuclear radiation and a turbine device (204) which comprises a rotor (304) which can modulate the flux (206) of the nuclear radiation on the detector. The turbine rotor can be installed in a fuel bundle (104), while the detector can be placed in an adjoining instrumentation tube (320). Included in the turbine rotor is material (308) which modulates the radiation field (neutron field and/or gamma field). The radiation detector detects (602) variations in the radiation field when the turbine rotor device is set into rotation by the coolant flow (900). The coolant flow rate is then calculated (603) from the speed of these variations.