CN201615917U - Signal collection circuit operated in magnetic core saturated zone - Google Patents
Signal collection circuit operated in magnetic core saturated zone Download PDFInfo
- Publication number
- CN201615917U CN201615917U CN2009200662020U CN200920066202U CN201615917U CN 201615917 U CN201615917 U CN 201615917U CN 2009200662020 U CN2009200662020 U CN 2009200662020U CN 200920066202 U CN200920066202 U CN 200920066202U CN 201615917 U CN201615917 U CN 201615917U
- Authority
- CN
- China
- Prior art keywords
- magnetic core
- terminal
- magnet ring
- signal
- inductance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Coils Or Transformers For Communication (AREA)
Abstract
The utility model relates to a signal collection circuit operated in a magnetic core saturated zone. A turn of conducting wires are threaded into the central hole of an inductance magnet ring (B) in a box to form the primary coil (L1) of the inductance magnet ring (B); two terminals of a mixed signal source (X) are respectively and electrically connected with two terminals of the primary coil (L1) of the inductance magnet ring (B); one terminal of the secondary coil (L2) of the inductance magnet ring (B), one terminal of an inductor (L3) and one terminal of a capacitor (C) are electrically connected with one terminal of a signal processor (F); and the other terminal of the secondary coil (L2) of the inductance magnet ring (B), the other terminal of the inductor (L3) and the other terminal of the capacitor (C) are electrically connected with the other terminal of the signal processor (F). Circuit parallel resonance is adopted to compensate the lost signal voltage of the magnetic core of the inductance magnet ring (B) in a magnetic induction saturated zone during operation, to ensure the magnetic core can be operated in the magnetic induction saturated zone, so that not only can the material and the cost of the inductance magnet ring be reduced, but also high-frequency electric signals can be reliably collected.
Description
Affiliated technical field
The utility model relates to a kind of signal acquisition circuit, especially at the signal acquisition circuit of magnetic core saturation region operation.
Background technology
At present, the known way of electromagnetic induction of utilizing is gathered the device that changes electric signal in the lead, it all is the induction magnetic core that utilizes in its harvester, collect the electromagnetic field information that detected lead changes, make the induction magnetic core in these electromagnetic fields, obtain the magnetic flux of a variation, the magnetic flux of this variation passes coil, in this output one of coil two ends and its electromagnetic intensity corresponding voltage signal, thus electric signal in the lead that obtains to gather.But wanting to differ 1000 times low-frequency strong magnetic field signal and higher-frequency low-intensity magnetic field signal by collect both intensity simultaneously with upper type, but is very difficult.This is that magnetic core is saturated because low-frequency strong magnetic field often makes induction, and higher-frequency low-intensity magnetic field signal is attenuated in induction magnetic core zone of saturation usually, sometimes in addition the harmonic noise that is produced in the sensed magnetic core zone of saturation flood and more difficult collecting.Make the induction magnetic core in low-frequency strong magnetic field not by saturated, the volume that usually goes to strengthen the induction magnetic core solves, and the volume of increasing induction magnetic core, both loss material, increased cost, also increased loss, especially increased the electric signal loss of upper frequency, thereby caused often can not collecting the more weak electric signal of upper frequency electric energy.
Summary of the invention
In order to overcome many costs height of existing induction magnetic core materials and the problem that often can not detect the more weak electric signal of upper frequency, the utility model provides a kind of signal acquisition circuit in the magnetic core saturation region operation, this circuit can not only make induction magnetic core materials reduce the cost reduction, and can collect the electric signal of upper frequency reliably.
The technical scheme that its technical matters that solves the utility model adopts is: mixed source (X) two ends are electrically connected with induction magnetic core (B) primary winding (L1) two ends, induction magnetic core (B) secondary coil (L2) end, inductance (L3) end, electric capacity (C) end are electrically connected with signal processor (F) end, respond to magnetic core (B) secondary coil (L2) other end, inductance (L3) other end, electric capacity (C) other end, signal processor (F) other end be electrically connected.Induction magnetic core (B) primary winding (L1) is that a circle lead constitutes, the number of turns of primary winding (L1) lead is many more, the degree of saturation of induction magnetic core (B) magnetic core is just dark more, needs only like this primary winding (L1) number of turns only is reduced to minimum around the degree of saturation that a circle just can be responded to magnetic core (B) magnetic core.When the big electric current of low frequency that contains the upper frequency electric signal that needs detect of mixed source (X) is flowed through induction magnetic core (B) primary winding (L1), around the lead of induction magnetic core (B) primary winding (L1), produce the electromagnetic field of a variation, the magnetic core of induction magnetic core (B) obtains the magnetic flux of a variation in this electromagnetic field, the magnetic flux of this variation passes induction magnetic core (B) secondary coil (L2), in the two ends output one of induction magnetic core (B) secondary coil (L2) and its electromagnetic intensity corresponding voltage signal, thereby the electric signal of its various different frequencies is from the two ends output of induction magnetic core (B) secondary coil (L2).The impedance that the high more electric signal inductance (L3) of frequency is presented is big more, and the impedance that the low more electric signal inductance (L3) of frequency is presented is more little, the big current signal of low frequency of going up output at induction magnetic core (B) secondary coil (L2) then can pass through inductance (L3) smoothly, because have the big electric current of low frequency to flow through on induction magnetic core (B) secondary coil (L2), the big electric current of this low frequency produces an anti-magnetic flux in induction magnetic core (B) magnetic core, this anti-magnetic flux can avoid responding to the magnetic core of magnetic core (B) too early enter degree of depth saturation region operation, moreover inductance (L3) is very little to the impedance that low-frequency current presents, low frequency signal is at the voltage drop at inductance (L3) the two ends end very just, the voltage of the big current signal of low frequency is significantly decayed, and has improved the signal to noise ratio (S/N ratio) of circuit.Because induction magnetic core (B) is smaller, the magnetic core of induction magnetic core (B) in most cases still is in the work of magnetic saturation district.Inductance (L3), induction magnetic core (B) secondary coil (L2) constitutes antiresonant circuit with electric capacity (C), its resonance frequency is the frequency of that upper frequency electric signal, and the value of electric capacity (C) is the value when induction magnetic core (B) magnetic core is in that certain point produces resonance on the degree of depth saturation region, because circuit is in the tuning-points frequency with interior low-frequency range saturation region operation always, exist the electric signal of that upper frequency in the circuit again, the magnetic core of induction magnetic core (B) is saturated dark more, the actual frequency of circuit parallel resonance is just the closer to the frequency of that upper frequency electric signal of tuning-points, the voltage of that upper frequency electric signal at electric capacity (C) two ends is just high more, the compensation that the electric signal of that upper frequency obtains is just many more, in time obtain compensation when making the electric signal of that upper frequency meet decay in the saturation region, the electric signal of guaranteeing that upper frequency has the signal intensity of sufficient Enough.Can not only make induction magnetic core materials reduce the cost reduction thereby reach, and can collect the electric signal of upper frequency reliably.
The beneficial effects of the utility model are, in signals collecting with automatically in the industrial application such as control, make circuit reduction in the equipment, and few with material, volume is little, and cost is low.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is circuit theory diagrams of the present utility model.
Fig. 2 is the structural drawing of induction magnetic core (B).
B. induction magnetic core among the figure, X. mixed source, primary winding of L1. induction magnetic core, the secondary coil of L2. induction magnetic core, L3. inductance, C. electric capacity, F. signal processor.
Embodiment
Penetrate induction magnetic core (B) center pit one circle lead and constitute induction magnetic core (B) primary winding (L1), mixed source (X) two ends are electrically connected with induction magnetic core (B) primary winding (L1) two ends, induction magnetic core (B) secondary coil (L2) end, inductance (L3) end, electric capacity (C) end are electrically connected with signal processor (F) end, respond to magnetic core (B) secondary coil (L2) other end, inductance (L3) other end, electric capacity (C) other end, signal processor (F) other end be electrically connected.
Claims (2)
1. signal acquisition circuit in the magnetic core saturation region operation, in the machine box, primary winding (L1), induction magnetic core (B), secondary coil (L2) cooperate successively, it is characterized in that: mixed source (X) two ends are electrically connected with induction magnetic core (B) primary winding (L1) two ends respectively, induction magnetic core (B) secondary coil (L2) end, inductance (L3) end, electric capacity (C) end are electrically connected with signal processor (F) end, respond to magnetic core (B) secondary coil (L2) other end, inductance (L3) other end, electric capacity (C) other end, signal processor (F) other end be electrically connected.
2. the signal acquisition circuit in the magnetic core saturation region operation according to claim 1 is characterized in that: induction magnetic core (B) primary winding (L1) is a circle lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200662020U CN201615917U (en) | 2009-10-01 | 2009-10-01 | Signal collection circuit operated in magnetic core saturated zone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200662020U CN201615917U (en) | 2009-10-01 | 2009-10-01 | Signal collection circuit operated in magnetic core saturated zone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201615917U true CN201615917U (en) | 2010-10-27 |
Family
ID=43002284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200662020U Expired - Fee Related CN201615917U (en) | 2009-10-01 | 2009-10-01 | Signal collection circuit operated in magnetic core saturated zone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201615917U (en) |
-
2009
- 2009-10-01 CN CN2009200662020U patent/CN201615917U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103560593A (en) | Electric field coupled power transfer system and control method based on novel topology | |
| CN104237604A (en) | Current monitoring warning device for overhead transmission line | |
| CN100429855C (en) | Power supply wave shape correcting filter | |
| CN202679197U (en) | DC permanent magnetism brush motor | |
| CN205566240U (en) | Multi -level filter | |
| CN201615917U (en) | Signal collection circuit operated in magnetic core saturated zone | |
| CN103105593B (en) | Novel cross-core type sensor | |
| CN205982669U (en) | Multi -frequency metallic foreign object detects quick -witted signal reception circuit module | |
| CN206118075U (en) | Electromagnetic heating arranges machine | |
| CN203798967U (en) | Detection impedance unit of long-distance high-voltage cable partial discharging and fault positioning | |
| CN202275686U (en) | Common mode inductor, common mode filter and switching mode power supply electromagnetic compatibility circuit | |
| CN102096109A (en) | Inductance type metal approach detecting probe | |
| CN213072095U (en) | Nanocrystalline magnetic core current transformer overcurrent protection circuit | |
| CN202334330U (en) | Rectified output circuit for switching power supply | |
| CN204116623U (en) | Anti-strong jamming inductance type transducer | |
| CN201837730U (en) | Inductance type metal approach detection probe | |
| CN107787061A (en) | Electromagnetic heating cooking machine | |
| CN201449421U (en) | Field strength meter | |
| CN201122897Y (en) | Common-mode radiation suppression circuit of switch power source | |
| CN101477151B (en) | Value quantitative method for inductor in EMI filter | |
| CN206022069U (en) | High frequency voltage bonder based on mixing magnetic core principle | |
| CN200950677Y (en) | Electromagnetic furnace with high-frequency, intermediate frequency and low-frequency filter | |
| CN103873156A (en) | Radio frequency measurement device with amplifier | |
| CN205139225U (en) | Current transformer current detection circuit | |
| CN203617062U (en) | SMD (Surface Mounted Device) winding type common-mode power inductor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101027 Termination date: 20121001 |