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Variable magnetic flux type rotating speed sensor of variable cross-section soft magnetic core

The technology of a speed sensor and a soft magnetic core, which is applied to devices using electrical/magnetic methods, etc., can solve the problems that are not conducive to further improving the sensor signal, and achieve the goal of reducing the volume and weight of products, optimizing the magnetic field, and improving the magnetic induction intensity. Effect

Pending Publication Date: 2022-01-04
SICHUAN XINCHUAN AVIATION INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This structure is not conducive to further improving the signal of the sensor

Method used

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  • Variable magnetic flux type rotating speed sensor of variable cross-section soft magnetic core
  • Variable magnetic flux type rotating speed sensor of variable cross-section soft magnetic core
  • Variable magnetic flux type rotating speed sensor of variable cross-section soft magnetic core

Examples

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Effect test

Embodiment 1

[0027] Such as figure 2 As shown, one embodiment of the present invention provides a variable magnetic flux speed sensor with a variable cross-section soft magnetic core, including a gear assembly 1 and a speed sensor assembly 2. The gear assembly 1 is a disc-shaped structure. There are serrations 101 evenly distributed on the peripheral surface, and the rotation of the gear assembly 1 is driven by an external driving source, which can realize the rotation of the gear assembly 1 through the serrations 101, and periodically disturb the magnetic field established in the soft magnetic core 201 by the permanent magnet 203 , so that the coil 202 induces a periodic induced voltage, and at the same time, the coil 202 outputs the generated periodic electrical signal to the outside.

[0028] The speed sensor assembly 2 is arranged on the radial side where the gear assembly 1 is located, and the speed sensor assembly 2 includes a soft magnetic core 201, a coil 202 and a permanent magne...

Embodiment 3

[0033] Such as Figure 4 As shown, another embodiment of the present invention includes a gear assembly 1 (remarked in the original figure), a rotational speed sensor assembly 2, the gear assembly 1 is a disc-shaped structure, and serrations are evenly distributed on the peripheral surface where the gear assembly 1 is located. 101, and the rotation of the gear assembly 1 is driven by an external drive source. There are two groups of soft magnetic cores 201 arranged in parallel.

[0034] The positive section (end face) where the soft magnetic core 201 is located can be set to a rectangular structure, and the permanent magnets 203 are arranged at the end positions where the two groups of soft magnetic cores 201 are located (that is, the tail ends of the two groups of soft magnetic cores 201 sandwich the permanent magnets 203 between In the middle, the direction of the magnetic field is the direction of the connecting lines at the tail ends of the two groups of soft magnetic cor...

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Abstract

The invention discloses a variable magnetic flux type rotating speed sensor of a variable cross-section soft magnetic core, which comprises a gear assembly and a rotating speed sensor assembly; the gear assembly rotates through an external driving source; the rotating speed sensor assembly is arranged on the radial side where the gear assembly is located, meanwhile, the rotating speed sensor assembly comprises a soft magnetic core, a coil and a permanent magnet, the permanent magnet is arranged at the rear end of the soft magnetic core, the section of the soft magnetic core is gradually enlarged from the gear assembly to the permanent magnet end, and a coil is wound on the peripheral surface of the soft magnetic core; through rotation of the sawteeth, a magnetic field established by the permanent magnet in the soft magnetic core is periodically disturbed, so that the coil induces periodic induction voltage, and meanwhile, generated periodic electric signals are output outwards through the coil. According to the device, the coil resistance can be reduced, the load capacity of the sensor is improved, the volume utilization is maximized, and the output voltage can be improved by 25% when the volume is fixed and other constraint conditions are the same, so that the signal detectability is improved.

Description

technical field [0001] The invention belongs to the technical field of rotational speed sensors, in particular to a variable magnetic flux rotational speed sensor with variable cross-section soft magnetic cores. Background technique [0002] The magnetoelectric sensor is a kind of electromagnetic sensor principle, which converts the input motion speed into the induced potential output in the coil. It directly converts the mechanical energy of the measured object into electrical signal output, and does not need an external power supply. It is a typical passive sensor. The design of this passive sensor greatly simplifies the matching secondary instrument circuit. [0003] Such as figure 1 As shown, it is a traditional variable magnetic flux speed sensor and its application scene. The left side is a rotating measured target. 602, it can cause the magnetic flux of the soft magnetic core 602 to change, so that the coil wound outside the soft magnetic core 602 induces a periodic...

Claims

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Application Information

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IPC IPC(8): G01P3/44
CPCG01P3/44
Inventor 黎世清丁星程
Owner SICHUAN XINCHUAN AVIATION INSTR
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