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Magnetic sensitive vibrator

An oscillator and magneto-sensitivity technology, which is applied in the field of magnetoelectric conversion and sensing, can solve the problems that magnetoelectric conversion cannot be completed, the oscillator has no magnetic sensitivity, etc., and achieve low manufacturing cost, simple circuit, and high sensitivity of magnetoelectric conversion Effect

Inactive Publication Date: 2004-04-28
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of the oscillator is that the oscillator has no magnetic sensitivity and cannot complete the magnetoelectric conversion; the oscillator can only work normally within the voltage range of about Vcc ± 0.2Vcc, and the ability to adapt to changes in the power supply voltage is poor.

Method used

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  • Magnetic sensitive vibrator
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Examples

Experimental program
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Effect test

Embodiment 1

[0017] In this embodiment: the amorphous magnet strip 1 is made of iron-based nanometer material, and its length and width are 20mm and 2mm respectively; the capacity of the first capacitor 3 is 51PF; NPN type silicon radio frequency transistor between 300; the resistance value of the first resistor 5 is 510Ω; the capacity of the second capacitor 8 is 51PF; the inner diameter, outer diameter and length of the inductance 12 are 2mm, 2.5mm and 25mm respectively, and the inductance 12 is composed of The enameled wire with a diameter of 0.1mm is wound with 100 turns; the resistance value of the fourth resistor 16 is 100KΩ, the capacity of the third capacitor 17 is 510PF, and the time constant of the resistance-capacitance low-pass filter is 51μs; the resistance value of the second resistance 13 The value is 33KΩ; the two-terminal network is a network in which the third resistor 21 and the fourth capacitor 22 are connected in parallel, the resistance value of the third resistor 21 i...

Embodiment 2

[0019] In this embodiment: the resistance value of the second resistor 13 is 16KΩ; the two-terminal network is a network in which the first diode 14 and the second diode 15 are forwardly connected in series, and the first diode 14 and the second diode 15 The second diode 15 is a silicon rectifier diode; the power supply voltage Vcc is 6-24V. Apart from this, the specifications and requirements of other components are exactly the same as those in Embodiment 1.

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Abstract

The present invention relates to the field of magnetoelectric conversion and sensitive technology, and the magnetic vibrator consists of a Colpitts oscillator, a non-crystalline magnet strip and a low-pass RC filter. The Colpitts oscillator contains a inductor with inside non-crystalline magnet strip made of nanometer iron base material or cobalt base material. The magnetic vibrator has simple circuit, small volume, wide operation temperature range and other advantages, and is suitable for detection of magnetic field, magnetic field strength and other quantity capable of being converted into magnetic field strength.

Description

technical field [0001] The invention relates to a magneto-sensitive oscillator, which belongs to the technical field of magnetoelectric conversion and sensing. Background technique [0002] Japanese Patent JP09080134A (JP-9-80134) relates to a Colpitts oscillator type magnetic sensor. circuit such as figure 1 shown. The sensor is mainly a Colpitts oscillator composed of an amorphous magnet wire 1, a resistor 2, a capacitor 3, a transistor 4, a resistor 5, a bias coil 6, a variable resistor 7, a capacitor 8 and an inductor 12, wherein In addition to the inductor 12, the capacitor 3 and the capacitor 8, the LC oscillating circuit also includes an amorphous magnet wire 1, and the amorphous magnet wire 1 straddles between the inductor 12 and the collector of the transistor 4 through electrical connection. The output signal Vosc of the sensor is output through the collector of the transistor 4 . Vosc is a small-amplitude radio frequency signal, which nee...

Claims

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Application Information

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IPC IPC(8): G01R33/02H03B5/08
Inventor 杨介信杨燮龙陈国宫峰飞钱思明
Owner EAST CHINA NORMAL UNIV
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