CN102752028B - Passive frequency-selecting amplification receiver of power carrier - Google Patents
Passive frequency-selecting amplification receiver of power carrier Download PDFInfo
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- CN102752028B CN102752028B CN201210238333.9A CN201210238333A CN102752028B CN 102752028 B CN102752028 B CN 102752028B CN 201210238333 A CN201210238333 A CN 201210238333A CN 102752028 B CN102752028 B CN 102752028B
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- frequency
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Abstract
The invention discloses a passive frequency-selecting amplification receiver of a power carrier. The passive frequency-selecting amplification receiver comprises a primary frequency-selecting unit, a magnetoelectricity feedback unit and a frequency-selecting output unit, wherein the primary frequency-selecting unit is connected with a power grid, the magnetoelectricity feedback unit is electromagnetically coupled with the primary frequency-selecting unit, and the frequency-selecting output unit is electromagnetically coupled with the magnetoelectricity feedback unit; the primary frequency-selecting unit, the magnetoelectricity feedback unit and the frequency-selecting output unit utilize LC (inductance/capacitor) oscillation circuits; and the magnetoelectricity feedback unit is formed by a plurality of LC resonance circuits in a coupling cascade expansion manner so that pass band quality factor and pass band gain of the frequency-selecting amplification receiver can be further improved. The passive frequency-selecting amplification receiver provided by the invention has the advantages that a passive structure is utilized, an independent power supply for supplying power is not needed, the structure is simple and the power consumption is small; cycle inductance value is regulated through the rotation of a spiral magnetic core, the frequency of carrier can be strictly aligned, the pass band is narrow, the pass band damping is very small and a frequency-selecting effect is excellent; and high-voltage isolation can be carried out through an electromagnetic coupling principle, and high-voltage and interference angle signals are effectively isolated so that a range of inputted alternating current voltage signals can reach AC12-3,300V.
Description
Technical field
The invention belongs to electric power carrier communication technology field, the passive frequency selective that is specifically related to a kind of power carrier is amplified receiver.
Background technology
Tremendous development along with electronic technology and embedded system platform, more and more general by the situation of the same total processor collaborative work of a plurality of coprocessors in an application system, and in a large amount of application, coprocessor is distant with total processor, communication therebetween needs emphasis to consider problem while becoming system.Adopt cable, optical fiber as communications carrier, no doubt can access higher stability, yet can increase the complexity of system cost and hardware line.In the situation that some is special, such as the wiring quantity between total processor core coprocessor is restricted, it is not enforceable setting up a special-purpose wire communication carrier, the radio communication of having in this case adopt; But the reliability of radio communication and anti-interference be well below wire communication, and cost is also much higher than wire communication, processes at the same time a plurality ofly will introduce complicated geocoding algorithm during from equipment, and the reliability of system and exploitativeness are declined greatly.
For this reason, the electric power carrier communication technology that to have occurred based on supply line be communications carrier, electric power carrier communication technology is a kind of communication mode that utilizes power line to communicate as transmission medium.When the features such as on power line, impedance variation is large, noise jamming strong, power line network line topological complexity are transmitted carrier signal on power line, decay is large, noise jamming is serious.In the situation that carrier signal transmitted power is constant, the reception of signal receiving circuit is to determine that whether power line carrier, PLC is successfully crucial; Isolation forceful electric power ability, passband width, filtering electrical network disturbing pulse ability, high-quality amplifying power etc. become the main difficult technical that receiving system is amplified in power carrier signal frequency-selecting.
At present conventional power carrier frequency-selecting is amplified reception technique and is mainly contained following a few class:
(1) by specialized narrowband frequency modulation intermediate level circuit, come frequency-selecting to receive; And this frequency-selecting technology scheme includes vibration, mixing, amplitude limit, integration, frequency discrimination etc., this scheme discrete component is many, complex structure, active, passband Q value (quality factor) high to power reguirements and passband gain all poor, the compatibility of undesirable, anti-interference weak stability also bad, with the electrical network direct shortcoming such as isolation not, be mainly applicable in the good power line network environment of line-hit situation;
(2) the LC filter circuit by what cascade comes frequency-selecting to receive; This frequency-selecting technology scheme is the passive frequency selective mode that a kind of structure is very succinct, but also exist passband Q value and passband gain all very undesirable, antijamming capability weak, with the electrical network direct shortcoming such as isolation not, generally and other frequency selection method be used in conjunction with or be only applicable to short-distance transmission;
(3) by active bandpass filiter circuit, come frequency-selecting to receive; But this circuit structure is complicated, to high, the easy self-excitation poor stability of power reguirements, compatibility also bad, with the electrical network direct shortcoming such as isolation not;
(4) utilize crystal or ceramic resonance frequency selective amplifier to come frequency-selecting to receive; The advantages such as that this frequency-selecting amplifying technique scheme has is simple in structure, passive, the logical CFS center frequency stabilization of band, antijamming capability are good, but also exist passband Q value and passband gain to adjust, compatibility is bad, and the electrical network direct shortcoming such as isolation not;
(5) based on dsp chip indoor design IIR band pass filter software program, realize; But this frequency-selecting scheme also exist more complicated, the anti-strong jamming pulse of software algorithm structure ability not good enough, with the electrical network direct shortcoming such as isolation not.
Summary of the invention
For the existing above-mentioned technological deficiency of prior art, the passive frequency selective that the invention provides a kind of power carrier is amplified receiver, and simple in structure, frequency-selecting amplification performance is good, and without Power supply.
The passive frequency selective of power carrier is amplified a receiver, comprising:
The elementary frequency-selecting unit being connected with electrical network, for receive power frequency electric power signal from electrical network, and produces magnetic field Φ after this signal frequency-selecting is amplified
0;
With the magnetoelectricity feedback unit of elementary frequency-selecting unit electromagnetic coupled, for responding to described magnetic field Φ
0, and amplify magnetic field Φ by frequency-selecting
0strengthen, produce magnetic field Φ
n;
With the frequency-selecting output unit of magnetoelectricity feedback unit electromagnetic coupled, for responding to described magnetic field Φ
n, and amplify the carrier signal after output is amplified by frequency-selecting.
Described power frequency electric power signal includes ac signal, carrier signal and noise signal.
Described elementary frequency-selecting unit all inductance L in
0with a capacitor C
0form; Wherein, middle all inductance L
0one end and capacitor C
0one end be connected, middle all inductance L
0the other end and capacitor C
0the other end form signal input part.
Described magnetoelectricity feedback unit is formed by n LC resonant tank successively coupled cascade; Described LC resonant tank all inductance L in
iwith a capacitor C
iform; Wherein, one end of middle all inductance L i and capacitor C
ione end be connected, middle all inductance L
ithe other end and capacitor C
ithe other end be connected; N and i are the natural number that is greater than 0, and 1≤i≤n.
Described magnetic field Φ
nin afterbody LC resonant tank, all inductance produce.
Described frequency-selecting output unit all inductance L in
outwith a capacitor C
outform; Wherein, middle all inductance L
outone end and capacitor C
outone end be connected, middle all inductance L
outthe other end and capacitor C
outthe other end be connected and ground connection, capacitor C
outtwo ends form signal output port.
Preferably, described middle all inductance comprise insulation swivel nut, in described insulation swivel nut, are provided with magnetic core, and described magnetic core and insulation swivel nut threaded engagement, be wound with coil on described insulation swivel nut, and the two ends of described coil are respectively the two ends of middle all inductance; The present invention is by the threaded adjusting magnetic core relative depth of portion in coil, can adjusting inductance, accurately aim at carrier frequency, and thereby realize frequency-selecting, amplify.
Preferably, described elementary frequency-selecting unit is connected with electrical network by anti-surge protection module; Described anti-surge protection module is used for preventing that electrical network from producing surge infringement to receiver under the special statuss such as thunder and lightning, can ensure the fail safe of frequency-selecting amplification receiver.
The operation principle that receiver is amplified in frequency-selecting of the present invention is: the industrial-frequency alternating current with carrier signal is inputted from signal input port, by elementary frequency-selecting unit, it is carried out to frequency-selecting for the first time, by all inductance L in rotation
0screw core change the relative depth of magnetic core in inductance coil and then regulate L
0inductance value, make L
0and capacitor C
0the resonant tank resonance on carrier frequency point forming, now flows through L
0carrier signal reach maximum, therefore its corresponding magnetic field intensity producing is also maximum, this magnetic field intensity is far longer than the magnetic field intensity that ac signal and noise signal produce, therefore L
0the magnetic field Φ of upper generation
0can be similar to and to regard as and produced by carrier signal; Middle all inductance L in magnetoelectricity feedback unit
1by inductive coupling, receive Φ
0, according to electromagnetic induction principle, at L
1the upper induced current that can produce (flows through L
0on carrier signal electric current), by rotation L
1on screw core to regulate L
1inductance value, make L
1and capacitor C
1the resonant tank forming is resonance on carrier frequency point also; Now flow through L
1carrier signal reach maximum, therefore its corresponding relative Φ of magnetic field intensity producing
0be further improved; Frequency-selecting through multistage LC resonant tank is amplified, can be by Φ
0thereby magnetic field intensity lifting several times after generate magnetic field Φ
n; Inductance L in frequency-selecting output unit
outinduction receives magnetic field Φ
n, from electromagnetic induction principle, L
outupper meeting produces induced current (i.e. carrier signal electric current after the frequency-selecting of magnetoelectricity feedback unit is amplified), and then rotation L
outscrew core to regulate L
outinductance value, make L
outand C
outthe resonant tank forming is resonance on carrier frequency point also, further carrier signal frequency-selecting is amplified; And export the carrier signal after finally amplifying to outside demodulated equipment.
Beneficial effect of the present invention is:
(1) the present invention adopts passive structures, without independent current source power supply, simple in structure, power consumption is very little.
(2) the present invention, by all inductance values in the adjusting of rotation screw core, can strictly aim at carrier frequency, and passband is narrow and pass band damping is very little, and frequency-selecting effect is splendid.
(3) alternative carrier frequencies wide ranges of the present invention, the carrier frequency that can aim at adaptively 75～400KHz.
(4) the present invention carries out high pressure isolation by electromagnetic coupled principle, and effectively isolated high-voltage and the sharp signal of interference, make the scope of the ac voltage signal of input can reach AC12～3300V.
(5) magnetoelectricity feedback unit of the present invention is expanded and is formed by a plurality of LC resonant tank coupled cascades, can further improve passband Q value and passband gain that receiver is amplified in frequency-selecting.
Accompanying drawing explanation
Fig. 1 is the structural representation that receiver is amplified in frequency-selecting of the present invention.
Fig. 2 is the structural representation of middle all inductance.
Embodiment
In order more specifically to describe the present invention, below in conjunction with the drawings and the specific embodiments, technical scheme of the present invention and operation principle thereof are elaborated.
As shown in Figure 1, a kind of passive frequency selective of power carrier is amplified receiver, comprising: an elementary frequency-selecting unit, an anti-surge protection module, a magnetoelectricity feedback unit and a frequency-selecting output unit
Elementary frequency-selecting unit is for receiving power frequency electric power signal (including ac signal, carrier signal and noise signal) from electrical network, and generation magnetic field Φ after this signal frequency-selecting is amplified
0; It is connected with electrical network by anti-surge protection module, and anti-surge protection module is used for preventing that electrical network from producing surge infringement to receiver under the special statuss such as thunder and lightning; In present embodiment, it is the product of DJSPD220-40 (Shenzhen enlightening warship) that anti-surge protection module adopts model; Elementary frequency-selecting unit all inductance L in
0with a capacitor C
0form; Wherein, middle all inductance L
0one end and capacitor C
0one end be connected, middle all inductance L
0the other end and capacitor C
0the other end form signal input part and take over control surge protection module.
Magnetoelectricity feedback unit is for induced field Φ
0, and amplify magnetic field Φ by frequency-selecting
0strengthen, produce magnetic field Φ
2; In present embodiment, magnetoelectricity feedback unit is formed by two LC resonant tanks successively coupled cascade; The one LC resonant tank induced field Φ
0, and amplify magnetic field Φ by frequency-selecting
0strengthen, produce magnetic field Φ
1; The 2nd LC resonant tank induced field Φ
1, and amplify magnetic field Φ by frequency-selecting
1strengthen, produce magnetic field Φ
2; The one LC resonant tank and elementary frequency-selecting unit electromagnetic coupled, it is all inductance L in one
1with a capacitor C
1form; Wherein, middle all inductance L
1one end and capacitor C
1one end be connected, middle all inductance L
1the other end and capacitor C
1the other end be connected; The 2nd LC resonant tank and a LC resonant tank electromagnetic coupled, it is all inductance L in one
2with a capacitor C
2form; Wherein, middle all inductance L
2one end and capacitor C
2one end be connected, middle all inductance L
2the other end and capacitor C
2the other end be connected.
Frequency-selecting output unit is for induced field Φ
2, and amplify the carrier signal after output is amplified by frequency-selecting; In present embodiment, the 2nd LC resonant tank electromagnetic coupled in itself and magnetoelectricity feedback unit, frequency-selecting output unit is all inductance L in one
outwith a capacitor C
outform; Wherein, middle all inductance L
outone end and capacitor C
outone end be connected, middle all inductance L
outthe other end and capacitor C
outthe other end be connected and ground connection, capacitor C
outtwo ends form signal output port and be connected with outside demodulating equipment.
As shown in Figure 2, middle all inductance comprise insulation swivel nut, in insulation swivel nut, are provided with magnetic core, and magnetic core and insulation swivel nut threaded engagement, be wound with coil on insulation swivel nut, and the two ends of coil are respectively the two ends of middle all inductance.
The operation principle of present embodiment is: the industrial-frequency alternating current with carrier signal is inputted from signal input port, by elementary frequency-selecting unit, it is carried out to frequency-selecting for the first time, by all inductance L in rotation
0screw core change the relative depth of magnetic core in inductance coil and then regulate L
0inductance value, make L
0and capacitor C
0the resonant tank resonance on carrier frequency point forming, now flows through L
0carrier signal reach maximum, therefore its corresponding magnetic field intensity producing is also maximum, this magnetic field intensity is far longer than the magnetic field intensity that ac signal and noise signal produce, therefore L
0the magnetic field Φ of upper generation
0can be similar to and to regard as and produced by carrier signal; Middle all inductance L of a LC resonant tank in magnetoelectricity feedback unit
1by inductive coupling, receive Φ
0, according to electromagnetic induction principle, at L
1the upper induced current that can produce (flows through L
0on carrier signal electric current), by rotation L
1on screw core to regulate L
1inductance value, make L
1and capacitor C
1the resonant tank forming is resonance on carrier frequency point also; Now flow through L
1carrier signal reach maximum, therefore its corresponding relative Φ of magnetic field intensity producing
0thereby be further improved, produce magnetic field Φ
1; In like manner through the frequency-selecting of the 2nd LC resonant tank, amplify, can be by Φ
1magnetic field intensity again after lifting, generate magnetic field Φ
2; Inductance L in frequency-selecting output unit
outinduction receives magnetic field Φ
2, from electromagnetic induction principle, L
outthe upper induced current that can produce (flows through L
2on carrier signal electric current), and then rotation L
outscrew core to regulate L
outinductance value, make L
outand C
outthe resonant tank forming is resonance on carrier frequency point also, further carrier signal frequency-selecting is amplified; And export the carrier signal after finally amplifying to outside demodulated equipment.
Claims (1)
1. the passive frequency selective of power carrier is amplified a receiver, it is characterized in that, comprising:
The elementary frequency-selecting unit being connected with electrical network, for receive power frequency electric power signal from electrical network, and produces magnetic field Φ after this signal frequency-selecting is amplified
0;
With the magnetoelectricity feedback unit of elementary frequency-selecting unit electromagnetic coupled, for responding to described magnetic field Φ
0, and amplify magnetic field Φ by frequency-selecting
0strengthen, produce magnetic field Φ
n;
With the frequency-selecting output unit of magnetoelectricity feedback unit electromagnetic coupled, for responding to described magnetic field Φ
n, and amplify the carrier signal after output is amplified by frequency-selecting;
Described elementary frequency-selecting unit all inductance L in
0with a capacitor C
0form; Wherein, middle all inductance L
0one end and capacitor C
0one end be connected, middle all inductance L
0the other end and capacitor C
0the other end form signal input part;
Described magnetoelectricity feedback unit is formed by n LC resonant tank successively coupled cascade; Described LC resonant tank all inductance L in
iwith a capacitor C
iform; Wherein, middle all inductance L
ione end and capacitor C
ione end be connected, middle all inductance L
ithe other end and capacitor C
ithe other end be connected; N and i are the natural number that is greater than 0, and 1≤i≤n;
Described frequency-selecting output unit all inductance L in
outwith a capacitor C
outform; Wherein, middle all inductance L
outone end and capacitor C
outone end be connected, middle all inductance L
outthe other end and capacitor C
outthe other end be connected and ground connection, capacitor C
outtwo ends form signal output port;
Described middle all inductance L
0, middle all inductance L
ior middle all inductance L
outcomprise insulation swivel nut, in described insulation swivel nut, be provided with magnetic core, described magnetic core and insulation swivel nut threaded engagement, be wound with coil on described insulation swivel nut, and the two ends of described coil are respectively the two ends of middle all inductance;
Described elementary frequency-selecting unit is connected with electrical network by anti-surge protection module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210238333.9A CN102752028B (en) | 2012-07-11 | 2012-07-11 | Passive frequency-selecting amplification receiver of power carrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210238333.9A CN102752028B (en) | 2012-07-11 | 2012-07-11 | Passive frequency-selecting amplification receiver of power carrier |
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| Publication Number | Publication Date |
|---|---|
| CN102752028A CN102752028A (en) | 2012-10-24 |
| CN102752028B true CN102752028B (en) | 2014-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210238333.9A Active CN102752028B (en) | 2012-07-11 | 2012-07-11 | Passive frequency-selecting amplification receiver of power carrier |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4636771A (en) * | 1984-12-10 | 1987-01-13 | Westinghouse Electric Corp. | Power line communications terminal and interface circuit associated therewith |
| CN1006745B (en) * | 1985-09-19 | 1990-02-07 | 阿尔卡泰尔有限公司 | Miniature inductor and method of manufacture same |
| CN2062452U (en) * | 1989-07-11 | 1990-09-19 | 李忠先 | Antomatic taking down the number of electric meter |
| CN2430813Y (en) * | 2000-06-16 | 2001-05-16 | 金卫东 | Remote switch controller |
| CN201142683Y (en) * | 2007-11-01 | 2008-10-29 | 武汉理工大学 | Special interface for naught 50 electric power L2C2 |
| CN201429896Y (en) * | 2009-05-05 | 2010-03-24 | 罗琳 | Power-carrier-wave alarming receiver |
-
2012
- 2012-07-11 CN CN201210238333.9A patent/CN102752028B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4636771A (en) * | 1984-12-10 | 1987-01-13 | Westinghouse Electric Corp. | Power line communications terminal and interface circuit associated therewith |
| CN1006745B (en) * | 1985-09-19 | 1990-02-07 | 阿尔卡泰尔有限公司 | Miniature inductor and method of manufacture same |
| CN2062452U (en) * | 1989-07-11 | 1990-09-19 | 李忠先 | Antomatic taking down the number of electric meter |
| CN2430813Y (en) * | 2000-06-16 | 2001-05-16 | 金卫东 | Remote switch controller |
| CN201142683Y (en) * | 2007-11-01 | 2008-10-29 | 武汉理工大学 | Special interface for naught 50 electric power L2C2 |
| CN201429896Y (en) * | 2009-05-05 | 2010-03-24 | 罗琳 | Power-carrier-wave alarming receiver |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102752028A (en) | 2012-10-24 |
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