Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Full-band magnetic sensor

A magnetic sensor and full-band technology, which is applied in the field of geophysics exploration, can solve the problem that the measurement bandwidth of magnetic sensors is difficult to extend, and achieve the effect of large low-frequency magnification and small high-frequency magnification to achieve measurement bandwidth

Inactive Publication Date: 2020-04-14
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a full-band magnetic sensor, which aims to solve the technical problem that the measurement bandwidth of the magnetic sensor in the prior art is difficult to extend to the ultra-low frequency of 0.001 Hz

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Full-band magnetic sensor
  • Full-band magnetic sensor
  • Full-band magnetic sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] as attached Figure 2-3 As shown, the full-band magnetic sensor provided in this embodiment includes an induction coil, an impedance conversion circuit, a voltage measurement module, and an integrator that are electrically connected in sequence.

[0032] The induction coil is used to generate an induced electromotive force according to the passing magnetic flux.

[0033] The impedance conversion circuit is connected to the output end of the induction coil, which is used to increase the loop resistance of the induction coil and reduce the quality factor Q value of the corresponding signal, so that the amplitude characteristic at the resonance frequency point is suppressed, and the signal-to-noise ratio of the measurement signal is improved .

[0034] The voltage measuring module is electrically connected with the impedance transformation circuit and is used for measuring the induced electromotive force generated by the induction coil.

[0035] The integrator is electri...

Embodiment 2

[0073] Embodiment 2 is an embodiment of performing a performance test on a magnetic sensor of the present invention.

[0074] There is a magnetic sensor with a resonant frequency of 20kHz in the laboratory, which can be applied to controllable source audio frequency (CSAMT) detection. The self-inductance of the measurement coil is 0.3459H, the parasitic capacitance is 170pF, and the resistance of the measurement coil is 1934Ω. The equivalent area is S=112.903mm2, the number of turns of the measuring coil is 10000 turns, the feedback resistance Rf=1kΩ, the number of turns of the feedback coil is 35 turns, the effective magnetic permeability is 705, and the magnification is 1, then the formula (1) It can be seen that the conversion relationship between whether the measuring coil has feedback magnetic flux or not is as follows: Figure 4 shown.

[0075] It can be seen that as the feedback resistance decreases, the feedback depth increases and the bandwidth expands. However, the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
capacitanceaaaaaaaaaa
electrical resistanceaaaaaaaaaa
Login to View More

Abstract

The present invention is applicable to the technical field of exploration geophysics, and provides a full-band magnetic sensor. The full-band magnetic sensor includes an induction coil, a voltage measurement module and an integrator. The full-frequency magnetic sensor detects the induced electromotive force generated by the induction coil through the voltage measurement module. Finally, the integrator used has the characteristics of large low-frequency magnification and small high-frequency magnification, so as to realize the expansion of the measurement bandwidth, and extend the measurement bandwidth of the magnetic sensor to the ultra-low frequency of 0.001Hz. Under the condition of no magnetic flux negative feedback Realize the measurement of the whole frequency band.

Description

technical field [0001] The invention belongs to the technical field of exploration geophysics, and in particular relates to a full frequency band magnetic sensor. Background technique [0002] The inductive magnetic sensor (hereinafter referred to as the magnetic sensor) is based on Faraday's law of electromagnetic induction, using the proportional relationship between the output voltage of the coil and the change in the magnetic flux passing through the coil, and indirectly measuring the magnetic field through the output voltage of the induction coil. [0003] The frequency band measured by the electromagnetic method is very wide, ranging from a period of 0.001Hz to 10kHz. Because the quality factor of the coil is usually high, it is difficult to expand its bandwidth. The existing technology almost uses the magnetic flux negative feedback method to expand the measurement bandwidth. figure 1 It is a schematic diagram of the circuit structure of the inductive magnetic sensor...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01V3/10G01R33/06
CPCG01R33/06G01V3/10G01R33/0023G01R33/02H01F27/28
Inventor 底青云真齐辉张天信王煜亮刘志尧杨全民
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com