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Four-hole site coil integral force transducer based on principle of piezomagnetic effect

A force sensor and piezomagnetic effect technology, which is applied in the direction of measuring the change force of the magnetic properties of the material caused by the applied stress, can solve the problems of non-returning to zero, small magnetic permeability, poor repeatability, etc., and achieve Effects of reducing excitation power, improving stability, and compensating for irregular drift

Active Publication Date: 2013-10-23
BEIJING ARITIME INTELLIGENT CONTROL
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Problems solved by technology

[0007] The purpose of the present invention is to solve the defects of the piezomagnetic force sensor with the overall structure of the two-hole horizontal coils, such as progressively smaller magnetic permeability, large temperature drift, non-return-to-zero signal, and poor repeatability, and provide a measurement area. The piezomagnetic force sensor with four-hole overall structure can be applied to the measurement of the rolling force of various rolling mills, and can also be applied to various large-tonnage weighing occasions

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  • Four-hole site coil integral force transducer based on principle of piezomagnetic effect
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  • Four-hole site coil integral force transducer based on principle of piezomagnetic effect

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Embodiment Construction

[0022] The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

[0023] The present invention is a novel four-hole position coil integral structure load cell based on the principle of piezomagnetic effect, such as image 3 As shown, it includes sensor piezoelectric body 1, horizontal hole 2, horizontal coil W 1.2 3. Vertical hole position 4. Vertical coil W 3.4 5. Differential rectification output circuit 6, excitation transformer 7 and low frequency excitation power supply 8.

[0024] Such as image 3 a and image 3 As shown in b, the material of the sensor piezomagnetic body 1 is a magnetically isotropic iron-silicon non-oriented soft magnetic alloy, which is forged from a steel ingot, processed into a shape (circular, circular or rectangular), vacuum heat treated (to eliminate internal stress) restore magnetic properties), and the force surface is ground.

[0025] There are multiple sets of measurement area...

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Abstract

The invention discloses a novel four-hole site coil integral force transducer based on the principle of piezomagnetic effect. The force transducer comprises a transducer piezomagnetic body, a horizontal hole site, a horizontal coil W1.2, a vertical hole site, a vertical coil W3.4, a differential rectification output circuit, an excitation transformer and a low-frequency excitation power supply. In the invention, a horizontal hole site measurement coil and a vertical hole site compensation coil in a measurement area are completely separated; based on the inherent characteristic of the magnetic body material that the longitudinal magnetic conductivity parallel to an external force F is very sensitive to stress while the transverse magnetic conductivity vertical to the external force F is not sensitive to the stress, the measurement circuit is designed as an inductive four-wall balanced bridge according to the electric principle; and the bridge output is in a current rectification and resistance voltage reduction mode so as to realize an integral optimization measurement circuit with three-wire excitation, differential compensation and DC (direct current) output.

Description

technical field [0001] The invention belongs to the technical field of force value measurement of mechanical, electronic, electromagnetic and mechanical integrated sensors, to be precise, it relates to an integral force measuring sensor with a four-hole coil applying the principle of piezomagnetic effect. Background technique [0002] The principle of piezomagnetic effect has been used for more than half a century since it was applied in the 1960s. The piezomagnetic load cell represented by the Swedish ABB company is the most widely used, and its technical performance indicators have not been surpassed so far. [0003] The material of the ABB force sensor is a soft magnetic alloy stainless steel silicon steel sheet, and the structure is lamination bonding or winding bonding. The coil hole position in the measurement area is a four-hole symmetrical structure, and the two windings are orthogonal winding. The principle Orthogonal coupling (biased coupling, magnetic crooked coup...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/12
Inventor 高增雪邹凤欣张思聪由菁菁
Owner BEIJING ARITIME INTELLIGENT CONTROL
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