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Sensor for detecting weak stress and preparation method of sensor

A sensor and stress technology, which is applied in the field of sensors for detecting weak stress and their preparation, can solve the problems of high requirements for measurement circuits and the influence of capacitive stress sensors, and achieves good biocompatibility, good application prospects, and improved detection sensitivity. Effect

Active Publication Date: 2015-06-10
NINGBO INNOVATION CENT FOR APPLIED MAGNETICS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, capacitive strain sensors are susceptible to parasitic capacitance in the connecting wires and therefore place high demands on the measurement circuit

Method used

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  • Sensor for detecting weak stress and preparation method of sensor
  • Sensor for detecting weak stress and preparation method of sensor
  • Sensor for detecting weak stress and preparation method of sensor

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0057] Specific implementation plan

[0058] The present invention will be further clarified below in conjunction with the drawings and embodiments. It should be understood that these embodiments are only used to illustrate the present invention, but not to limit the scope of the present invention.

[0059] Figure 1 to 3 The reference signs in are: flexible supporting surface 1, inductance coil 2, housing side wall 3, magnetic field unit 4, protrusion 5, position 6, position 7, and upper part 8 of the housing of the integrated magnetic field unit.

[0060] In this embodiment, such as figure 1 As shown, the sensor for detecting weak stress includes a supporting shell and an inductance coil 2 located inside the supporting shell.

[0061] The inductor coil 2 includes a magnetic core and an air-core coil, and the magnetic core passes through the inside of the air-core coil. The magnetic core is a cobalt-based amorphous soft magnetic material. The coil is made of 100 turns of copper wi...

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PUM

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Abstract

The invention provides a sensor for detecting weak stress. The stress sensor comprises a supporting housing, and an inductive coil positioned in the supporting housing; the supporting housing comprises a flexible supporting surface; a flexible bulge is connected to be above the flexible supporting surface; a magnetic field unit for providing a magnetic field to the inductive coil is connected to be below the flexible supporting surface; when in a working state, the outside weak stress acts on the flexible bulge, the flexible bulge generates pressure to drive the flexible supporting surface to deform to enable the change of a magnetic flux of the magnetic field unit on the inductive coil, and then the coil impedance changes and outputted from two ends of the coil, so that the outside weak stress straining can be detected, such as the pressure generated by the pulse fluctuating, air flow impacting or voice volume caused vibrating. The stress sensor has the advantages of being simple in structure, low in cost and high in sensitivity, and has a good application prospect.

Description

Technical field [0001] The invention relates to weak stress detection technology, in particular to a sensor for detecting weak stress and a preparation method thereof, and has good application prospects in the fields of weak pulse detection, noise detection, flow detection and the like. Background technique [0002] Pressure sensors are one of the commonly used sensors in the industry. They are widely used in the field of industrial automatic control, involving water conservancy and hydropower, railway transportation, intelligent buildings, production automation, aerospace, military, machine tools and many other industries. [0003] With the development of flexible electronics and wearable devices, stress sensors have attracted more and more attention. Traditional pressure sensors can be divided into piezoresistive, capacitive, piezoelectric and other categories. [0004] Piezoelectric pressure sensor is a sensor made according to the piezoelectric effect. It has the advantages of s...

Claims

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Application Information

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IPC IPC(8): G01L1/12A61B5/02
Inventor 巫远招刘宜伟李润伟李辉辉尚杰孙丹丹
Owner NINGBO INNOVATION CENT FOR APPLIED MAGNETICS CO LTD
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