A system for measuring the viscosity of a fluid comprises a rotor cup; a bob disposed within the rotor cup and having shaft rotatably coupled to the rotor cup; a bearing connecting the shaft of the bob to the rotor cup; a magnetic coupling comprising a first magnetic element connected to the shaft of the bob and a second magnetic element disposed outside the rotor cup adjacent to the first magnetic element; and an inertial measurement unit disposed adjacent to the second magnetic element which is capable of sensing rotation of the magnetic coupling.

There is provided a method of detecting a change of a state of a liquid comprising the steps of: •providing a liquid detection medium (12) comprising a liquid and having a plurality of anisotropic magnetic particles suspended therein; •applying a modulated magnetic field across at least a portion of the liquid detection medium (12), wherein the magnetic field induces an alignment of the magnetic particles; •introducing electromagnetic radiation (22) into the liquid detection medium (12); •detecting a variable which is modulated by the applied magnetic field, wherein the variable is associated with the interaction of the electromagnetic radiation (22) with the magnetic particles and wherein the change in the state of the liquid causes a variation in the detected variable; and •correlating the variation in the detected variable with the change in the state of the liquid.

A viscometer for inline determination of the viscosity of a fluid includes a drive device and a measuring device including a housing and a chamber. The drive device includes a housing in which a stator is arranged. The stator has and having a plurality of coil cores delimited by an end face, and carrying a concentrated winding, and being a bearing and drive stator with which the rotor is magnetically driven without contact and magnetically levitated without contact with respect to the stator. A control device actuates the stator and determines the viscosity based on an operating parameter of the electromagnetic rotary drive.

A bracket, a thrombelastography device, and a support system are disclosed. The device comprises: a fixed support part (101), a movable support part (102), and a connection part (103). The connection part comprises a first fixing connection member (1031) and a second fixing connection member (1032). The first fixing connection member is fixedly connected to the fixed support part; the second fixing connection member is fixedly connected to the movable support part; the first fixing connection member is connected to the second fixing connection member in point contact fashion, such that the first fixing connection member and the second fixing connection member can rotate relative to each other; the movable support part is fixedly connected to a supported object; when driven by the supported object, the movable support part rotates relative to the fixed support part by means of the point contact between the first fixing connection member and the second fixing connection member. The thrombelastography device comprises a rotational shaft and a bracket. The rotational resistance to the supported object when it rotates can be reduced.

A viscosity measurement unit includes a first stage having a first surface, a second stage having a second surface and configured to rotate with the second surface which is opposed and in proximity to the first surface, a motor including a motor body and a shaft that is an output shaft of the motor body and configured to rotate synchronously with the second stage, a fixed member arranged to rotatably support the shaft and the motor body, and a strain gauge unit fixed to the fixed member and configured to be biased by a contact of the motor body when the motor body rotates in a first direction with respect to the fixed member.

A medical analyzer and coagulation profiler performs various interrogations on specimens. A motor with reduction gearing moves and a video camera observes the samples, the cartridges or parts thereof. Changes in images are compared and recorded with a central processor that controls a display. Power supply, temperature controller, motor and gearing are mounted in a box which attaches to a smartphone. The smartphone provides the video camera, illumination and central processor that control the movement, temperature and display. The device makes testing simpler for small hospitals, clinics, ambulances, remote locations and individuals and controls a number of parallel or serial devices operating simultaneously or sequentially. A cartridge insertion actuates a circular motion to generate a blood profile based on changes. Change is analyzed with a video camera and processor such as in a smartphone and is plotted to show an amplitude and time. A smartphone provides a specific movement pattern.

A bracket, a thrombelastography device, and a support system are disclosed. The bracket comprises: a fixed support part (101), a movable support part (102), and a connection part (103). The connection part comprises a first fixing connection member (1031) and a second fixing connection member (1032). The first fixing connection member is fixedly connected to the fixed support part; the second fixing connection member is fixedly connected to the movable support part; the first fixing connection member is connected to the second fixing connection member in point contact fashion, such that the first fixing connection member and the second fixing connection member can rotate relative to each other; the movable support part is fixedly connected to a supported object; when driven by the supported object, the movable support part rotates relative to the fixed support part by means of the point contact between the first fixing connection member and the second fixing connection member. The thrombelastography device comprises a rotational shaft and a bracket. The rotational resistance to the supported object when it rotates can be reduced.

A partial pressure tool for real-time measurement and adjustment of pressure and viscosity and a measurement method thereof. The partial pressure tool includes an outer cylinder and adjustable annular throttling grooves, and the adjustable annular throttling grooves are split-type grooves vertically and successively installed on an inner wall of the outer cylinder at equal intervals. Four single throttling grooves are adjacent to each other and arranged concentrically on a circumferential surface. A viscometer is installed on a surface of an arc-shaped inner plate in a tail-end adjustable annular throttling groove. The viscometer is connected to an induction board through a transmission line. The arc-shaped inner plate in the tail-end adjustable annular throttling groove is provided with a pressure sensor and a torque sensor, and the pressure sensor and the torque sensor both are connected to the induction board. The induction board is connected to a DSP control module.

Viscosity assemblies may be used to determine the viscosity of a sample fluid at a surface location under one or more downhole conditions prior to pumping or flowing of the sample fluid downhole. A viscosity assembly may include a bob assembly disposed in a container that includes a bob disposed about a magnet rotor that rotates when a shear force is applied by the flow of the sample fluid in the container. A stator coil may receive a control signal that induces a force or a voltage that causes the magnet rotor to rotate the bob by a predetermined distance to position the bob from the rotated position back to the initial position.

A capillary bridge viscometer, comprises an input port (flow in) an output port (flow out) a first capillary tubing arm (R1) in a first hydraulic path between the input port and a first differential detection point (DP+), a second capillary tubing arm (R3) in a second hydraulic path between the first differential detection point (DP+) and the output port (flow out), a third capillary tubing arm (R2) in a third hydraulic path between the input port (flow in) and a second differential detection point (DP−), a fourth capillary tubing arm (R4) in a fourth hydraulic path between the second differential detection point (DP−) and the output port (flow out), an adjustable mechanical flow restrictor (20) in one of the first, second, third, and fourth hydraulic paths, wherein the adjustable mechanical flow restrictor (20) is operative to mechanically adjust a resistance to flow of a fluid while the fluid flows through the adjustable mechanical flow restrictor.