Wide-range magnetic-liquid micro differential pressure sensor
A micro differential pressure sensor and magnetic liquid technology, applied in the field of sensors, can solve the problem of small range, and achieve the effects of increasing the range, improving the pressure resistance and reducing magnetic leakage.
Inactive Publication Date: 2015-11-25
BEIJING JIAOTONG UNIV
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Problems solved by technology
[0007] The technical problem to be solved by the present invention: the problem that the range range of the existing magnetic liquid micro-pressure difference sensor is small
Method used
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Embodiment Construction
[0017] to attach figure 1 The present invention will be further described for the specific embodiment:
[0018] A large-range magnetic liquid micro-pressure difference sensor, the device includes: a transparent acrylic tube 1, a first restoring force magnet 2-1, a second restoring force magnet 2-2, a first induction coil 3-1, and a second induction coil 3-2, the first magnetic liquid ring 4-1, the second magnetic liquid ring 4-2, the first cylindrical magnet 5-1, the second cylindrical magnet 5-2, the iron core 6, and the magnetically conductive pole piece 7.
[0019] Connections between the parts of the device:
[0020] Wind the high-strength enamelled copper wire evenly, symmetrically, and with equal turns to both ends of the transparent acrylic tube 1 to form the first induction coil 3-1 and the second induction coil 3-2 respectively; at both ends of the iron core 6 The first cylindrical magnet 5-1 and the second cylindrical magnet 5-2 are adsorbed respectively, and the t...
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A wide-range magnetic-liquid micro differential pressure sensor is suitable for micro differential pressure measurement. The apparatus comprises a transparent acrylic tube (1), a first restoring force magnet (2-1), a second restoring force magnet (2-2), a first induction coil (3-1), a second induction coil (3-2), a first cylindrical magnet (5-1), a second cylindrical magnet (5-2), an iron core (6) and a leading pole boot (7). The first cylindrical magnet (5-1), the second cylindrical magnet (5-2) and the iron core (6) form a composite magnetic core. When the composite magnetic core moves in the transparent acrylic tube (1) under a micro differential pressure effect, a magnetic induction line generated by the first cylindrical magnet (5-1) and the second cylindrical magnet (5-2) is always tied in the leading pole boot (7) so as to form a complete magnetic conductive loop. A leakage flux of a system is effectively reduced, voltage endurance capabilities of a first magnetic liquid ring (4-1) and a second magnetic liquid ring (4-2) are increased and further a measuring range scope of the magnetic-liquid micro differential pressure sensor is increased too.
Description
technical field [0001] The invention belongs to the field of sensors and is suitable for micro pressure difference measurement. Background technique [0002] Micro-differential pressure measurement has a wide range of applications in the fields of industry, medical treatment, and biopharmaceuticals. Various semiconductor materials, ceramic materials, and new functional materials have been applied to the field of micro-pressure differential measurement. Magnetic liquid is a new type of functional material. It is formed by dissolving nano-sized ferromagnetic particles in a base carrier liquid after being wrapped with a surfactant. It can exist stably for a long time under the action of a magnetic field and a gravitational field. It has the characteristics of a solid-state material. The fluidity of magnetic and liquid materials is currently the only liquid magnetic material, and its special properties determine that it will have a wide range of applications in the field of sens...
Claims
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Inventor 李德才谢君
Owner BEIJING JIAOTONG UNIV