CN102752028A - Passive frequency-selecting amplification receiver of power carrier - Google Patents
Passive frequency-selecting amplification receiver of power carrier Download PDFInfo
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- CN102752028A CN102752028A CN2012102383339A CN201210238333A CN102752028A CN 102752028 A CN102752028 A CN 102752028A CN 2012102383339 A CN2012102383339 A CN 2012102383339A CN 201210238333 A CN201210238333 A CN 201210238333A CN 102752028 A CN102752028 A CN 102752028A
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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 the power line carrier, PLC technical 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; Situation by the same total processor collaborative work of a plurality of coprocessors in application system is more and more general; And in number of applications; Coprocessor is far away with the distance of total processor, communication therebetween needs emphasis to consider when becoming system design problem.Adopt cable, optical fiber no doubt can access advantages of higher stability as communications carrier, yet can increase the complexity of system cost and hardware line.Under some special situation, such as the wiring quantity between total processor core coprocessor restriction is arranged, set up the wire communication carrier of a special use and can not implement, have to adopt radio communication in this case; But the reliability of radio communication and anti-interference be well below wire communication, and cost also is much higher than wire communication, will introduce complicated geocoding algorithm when handling a plurality of slave unit at the same time, makes the reliability of system and exploitativeness descend greatly.
For this reason, having occurred based on supply line is the power line carrier, PLC technology of communications carrier, and the power line carrier, PLC technology is a kind of communication mode that utilizes power line to communicate as transmission medium.Characteristics such as impedance variations is big on the power line, noise jamming strong, power line network line topological complicacy make that decay was big when carrier signal was transmitted, noise jamming is serious on power line.Under the constant situation of carrier signal transmitted power, whether successful the reception of signal receiving circuit be decision power line carrier, PLC key; Isolate forceful electric power ability, passband width, filtering Disturbance in Power Net pulse ability, high-quality amplifying power etc. and become the main difficult technical that receiving system is amplified in the power carrier signal frequency-selecting.
Power carrier frequency-selecting commonly used is at present amplified reception technique and is mainly contained following several types:
(1) come frequency-selecting to receive through specialized narrowband frequency modulation intermediate level circuit; 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 all undesirable, the anti-interference weak stability of passband gain is poor, compatibility is also bad, and electrical network direct shortcoming such as isolation not, is applicable to that mainly the circuit disturbed condition is preferably in the power line network environment;
(2) the LC filter circuit through what cascade comes frequency-selecting to receive; This frequency-selecting technology scheme is the very succinct passive frequency selective mode of a kind of structure; But have also that passband Q value and passband gain are all very undesirable, antijamming capability is weak, with electrical network direct shortcoming such as isolations not, generally and other frequency selection method be used or only be applicable to short-distance transmission;
(3) come frequency-selecting to receive through active bandwidth-limited circuit; But this circuit structure is complicated, high to power reguirements, be prone to self-excitation poor stability, compatibility also bad, with electrical network direct shortcoming such as isolation not;
(4) utilize crystal or ceramic resonance frequency selective amplifier to come frequency-selecting to receive; 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 electrical network direct shortcoming such as isolation not;
(5) realize based on dsp chip indoor design IIR band pass filter software program; But this frequency-selecting scheme also exists, and the software algorithm structure is complicated, anti-strong jamming pulse ability is not good enough, with electrical network direct shortcoming such as isolation not.
Summary of the invention
To the above-mentioned technological deficiency of existing in prior technology, the passive frequency selective that the invention provides a kind of power carrier is amplified receiver, and simple in structure, the frequency-selecting amplification performance is good, and need not the power supply power supply.
A kind of passive frequency selective of power carrier is amplified receiver, comprising:
The elementary frequency-selecting unit that is connected with electrical network is used for receiving the power frequency electric power signal from electrical network, and back generation magnetic field Φ is amplified in this signal frequency-selecting
0
With the magnetoelectricity feedback unit of elementary frequency-selecting unit electromagnetic coupled, be used to respond to described magnetic field Φ
0, and amplify magnetic field Φ through frequency-selecting
0Strengthen, produce magnetic field Φ
n
With the frequency-selecting output unit of magnetoelectricity feedback unit electromagnetic coupled, be used to respond to described magnetic field Φ
n, and through the carrier signal after the frequency-selecting amplification output amplification.
Described power frequency electric power signal packet contains ac signal, carrier signal and noise signal.
Described elementary frequency-selecting unit is by all inductance L in
0With a capacitor C
0Form; Wherein, middle all inductance L
0An end and capacitor C
0An end link to each other middle all inductance L
0The other end and capacitor C
0The other end constitute signal input part.
Described magnetoelectricity feedback unit is formed by the cascade that is coupled successively of n LC resonant tank; Described LC resonant tank is by all inductance L in
iWith a capacitor C
iForm; Wherein, an end and the capacitor C of middle all inductance L i
iAn end link to each other middle all inductance L
iThe other end and capacitor C
iThe other end link to each other; N and i are the natural number greater than 0, and 1≤i≤n.
Described magnetic field Φ
nMiddle all inductance by afterbody LC resonant tank produce.
Described frequency-selecting output unit is by all inductance L in
OutWith a capacitor C
OutForm; Wherein, middle all inductance L
OutAn end and capacitor C
OutAn end link to each other middle all inductance L
OutThe other end and capacitor C
OutThe other end link to each other and ground connection capacitor C
OutTwo ends constitute signal output port.
Preferably, described in all inductance comprise the insulation swivel nut, be provided with magnetic core in the described insulation swivel nut, described magnetic core and insulation swivel nut threaded engagement are wound with coil on the described insulation swivel nut, the two ends of all inductance during the two ends of described coil are respectively; The present invention passes through the threaded adjusting magnetic core relative depth of portion in coil, can regulate inductance value, accurately aims at carrier frequency, thereby realizes the frequency-selecting amplification.
Preferably, described elementary frequency-selecting unit is connected with electrical network through anti-surge protection module; Described anti-surge protection module is used to prevent that electrical network from producing the surge infringement to receiver under 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 that has carrier signal is imported from signal input port, by elementary frequency-selecting unit it is carried out the frequency-selecting first time, through all inductance L in the rotation
0Screw core change magnetic core in inductance coil relative depth so that regulate L
0Inductance value, make L
0And capacitor C
0Resonant tank resonance on carrier frequency point of forming flows through L this moment
0Carrier signal reach maximum, so also maximum of its corresponding magnetic field intensity that produces, this magnetic field intensity is far longer than the magnetic field intensity that ac signal and noise signal are produced, so L
0The magnetic field Φ of last generation
0Can be similar to and regard as and produce by carrier signal; Middle all inductance L in the magnetoelectricity feedback unit
1Receive Φ through inductive coupling
0, according to electromagnetic induction principle, at L
1On can produce induced current and (promptly flow through L
0On the carrier signal electric current), through the rotation L
1On screw core to regulate L
1Inductance value, make L
1And capacitor C
1The resonant tank of forming is resonance on carrier frequency point also; Flow through L this moment
1Carrier signal reach maximum, so relative Φ of magnetic field intensity of its corresponding generation
0Be further improved; Frequency-selecting through multistage LC resonant tank is amplified, can be with Φ
0Thereby magnetic field intensity lifting several times after generate magnetic field Φ
nInductance L in the frequency-selecting output unit
OutInduction receives magnetic field Φ
n, can know L by electromagnetic induction principle
OutOn can produce 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 of forming is resonance on carrier frequency point also, further the carrier signal frequency-selecting is amplified; And the carrier signal after will finally amplifying exports outside demodulated equipment to.
Beneficial effect of the present invention is:
(1) the present invention adopts passive structures, need not independent current source power supply, and is simple in structure, power consumption is very little.
(2) all inductance values during the present invention regulates through the rotary threaded magnetic core can strictly be aimed at carrier frequency, and passband is narrow and pass band damping is very little, and the frequency-selecting effect is splendid.
(3) alternative carrier frequencies wide ranges of the present invention, the carrier frequency that can aim at 75～400KHz adaptively.
(4) the present invention carries out the high pressure isolation through the electromagnetic coupled principle, effective isolated high-voltage and the sharp signal of interference, and the scope of the feasible ac voltage signal of importing can reach AC12～3300V.
(5) magnetoelectricity feedback unit of the present invention is expanded by a plurality of LC resonant tank coupling cascades and is formed, and can further improve passband Q value and passband gain that receiver is amplified in frequency-selecting.
Description of drawings
Fig. 1 amplifies the structural representation of receiver for frequency-selecting of the present invention.
Fig. 2 is the structural representation of middle all inductance.
Embodiment
In order to describe the present invention more particularly, technical scheme of the present invention and operation principle thereof are elaborated below in conjunction with accompanying drawing and embodiment.
As shown in Figure 1, a kind of passive frequency selective of power carrier is amplified receiver, comprising: an elementary frequency-selecting unit, anti-surge protection module, a magnetoelectricity feedback unit and a frequency-selecting output unit
Elementary frequency-selecting unit is used for receiving power frequency electric power signal (including ac signal, carrier signal and noise signal) from electrical network, and back generation magnetic field Φ is amplified in this signal frequency-selecting
0It is connected with electrical network through anti-surge protection module, and anti-surge protection module is used to prevent that electrical network from producing the surge infringement to receiver under special statuss such as thunder and lightning; In this execution mode, it is the product of DJSPD220-40 (Shenzhen enlightening warship) that anti-surge protection module adopts model; Elementary frequency-selecting unit is by all inductance L in
0With a capacitor C
0Form; Wherein, middle all inductance L
0An end and capacitor C
0An end link to each other middle all inductance L
0The other end and capacitor C
0The other end constitute signal input part and take over control the surge protection module.
The magnetoelectricity feedback unit is used for induced field Φ
0, and amplify magnetic field Φ through frequency-selecting
0Strengthen, produce magnetic field Φ
2In this execution mode, the magnetoelectricity feedback unit is formed by the cascade that is coupled successively of two LC resonant tanks; The one LC resonant tank induced field Φ
0, and amplify magnetic field Φ through frequency-selecting
0Strengthen, produce magnetic field Φ
1The 2nd LC resonant tank induced field Φ
1, and amplify magnetic field Φ through frequency-selecting
1Strengthen, produce magnetic field Φ
2The one LC resonant tank and elementary frequency-selecting unit electromagnetic coupled, it is by all inductance L in
1With a capacitor C
1Form; Wherein, middle all inductance L
1An end and capacitor C
1An end link to each other middle all inductance L
1The other end and capacitor C
1The other end link to each other; The 2nd a LC resonant tank and a LC resonant tank electromagnetic coupled, it is by all inductance L in
2With a capacitor C
2Form; Wherein, middle all inductance L
2An end and capacitor C
2An end link to each other middle all inductance L
2The other end and capacitor C
2The other end link to each other.
The frequency-selecting output unit is used for induced field Φ
2, and through the carrier signal after the frequency-selecting amplification output amplification; In this execution mode, the 2nd LC resonant tank electromagnetic coupled in itself and the magnetoelectricity feedback unit, the frequency-selecting output unit is by all inductance L in
OutWith a capacitor C
OutForm; Wherein, middle all inductance L
OutAn end and capacitor C
OutAn end link to each other middle all inductance L
OutThe other end and capacitor C
OutThe other end link to each other and ground connection capacitor C
OutTwo ends constitute signal output port and be connected with outside demodulating equipment.
As shown in Figure 2, middle all inductance comprise the insulation swivel nut, are provided with magnetic core in the insulation swivel nut, and magnetic core and insulation swivel nut threaded engagement are wound with coil, the two ends of all inductance during the two ends of coil are respectively on the insulation swivel nut.
The operation principle of this execution mode is: the industrial-frequency alternating current that has carrier signal is imported from signal input port, by elementary frequency-selecting unit it is carried out the frequency-selecting first time, through all inductance L in the rotation
0Screw core change magnetic core in inductance coil relative depth so that regulate L
0Inductance value, make L
0And capacitor C
0Resonant tank resonance on carrier frequency point of forming flows through L this moment
0Carrier signal reach maximum, so also maximum of its corresponding magnetic field intensity that produces, this magnetic field intensity is far longer than the magnetic field intensity that ac signal and noise signal are produced, so L
0The magnetic field Φ of last generation
0Can be similar to and regard as and produce by carrier signal; Middle all inductance L of a LC resonant tank in the magnetoelectricity feedback unit
1Receive Φ through inductive coupling
0, according to electromagnetic induction principle, at L
1On can produce induced current and (promptly flow through L
0On the carrier signal electric current), through the rotation L
1On screw core to regulate L
1Inductance value, make L
1And capacitor C
1The resonant tank of forming is resonance on carrier frequency point also; Flow through L this moment
1Carrier signal reach maximum, so relative Φ of magnetic field intensity of its corresponding generation
0Produce magnetic field Φ thereby be further improved
1In like manner amplify through the frequency-selecting of the 2nd LC resonant tank, can be with Φ
1Magnetic field intensity generate magnetic field Φ once more after the lifting
2Inductance L in the frequency-selecting output unit
OutInduction receives magnetic field Φ
2, can know L by electromagnetic induction principle
OutOn can produce induced current and (promptly flow through L
2On the carrier signal electric current), and then the rotation L
OutScrew core to regulate L
OutInductance value, make L
OutAnd C
OutThe resonant tank of forming is resonance on carrier frequency point also, further the carrier signal frequency-selecting is amplified; And the carrier signal after will finally amplifying exports outside demodulated equipment to.
Claims (6)
1. the passive frequency selective of a power carrier is amplified receiver, it is characterized in that, comprising:
The elementary frequency-selecting unit that is connected with electrical network is used for receiving the power frequency electric power signal from electrical network, and back generation magnetic field Φ is amplified in this signal frequency-selecting
0
With the magnetoelectricity feedback unit of elementary frequency-selecting unit electromagnetic coupled, be used to respond to described magnetic field Φ
0, and amplify magnetic field Φ through frequency-selecting
0Strengthen, produce magnetic field Φ
n
With the frequency-selecting output unit of magnetoelectricity feedback unit electromagnetic coupled, be used to respond to described magnetic field Φ
n, and through the carrier signal after the frequency-selecting amplification output amplification.
2. the passive frequency selective of power carrier according to claim 1 is amplified receiver, it is characterized in that: described elementary frequency-selecting unit is by all inductance L in
0With a capacitor C
0Form; Wherein, middle all inductance L
0An end and capacitor C
0An end link to each other middle all inductance L
0The other end and capacitor C
0The other end constitute signal input part.
3. the passive frequency selective of power carrier according to claim 1 is amplified receiver, it is characterized in that: described magnetoelectricity feedback unit is formed by the cascade that is coupled successively of n LC resonant tank; Described LC resonant tank is by all inductance L in
iWith a capacitor C
iForm; Wherein, middle all inductance L
iAn end and capacitor C
iAn end link to each other middle all inductance L
iThe other end and capacitor C
iThe other end link to each other; N and i are the natural number greater than 0, and 1≤i≤n.
4. the passive frequency selective of power carrier according to claim 1 is amplified receiver, it is characterized in that: described frequency-selecting output unit is by all inductance L in
OutWith a capacitor C
OutForm; Wherein, middle all inductance L
OutAn end and capacitor C
OutAn end link to each other middle all inductance L
OutThe other end and capacitor C
OutThe other end link to each other and ground connection capacitor C
OutTwo ends constitute signal output port.
5. amplify receiver according to the passive frequency selective of claim 2,3 or 4 described power carriers; It is characterized in that: all inductance comprise the insulation swivel nut in described; Be provided with magnetic core in the described insulation swivel nut; Described magnetic core and insulation swivel nut threaded engagement are wound with coil on the described insulation swivel nut, the two ends of all inductance during the two ends of described coil are respectively.
6. the passive frequency selective of power carrier according to claim 1 is amplified receiver, it is characterized in that: described elementary frequency-selecting unit is connected with electrical network through 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 |
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| 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 true CN102752028A (en) | 2012-10-24 |
| CN102752028B CN102752028B (en) | 2014-08-27 |
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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 |
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| Publication number | Publication date |
|---|---|
| CN102752028B (en) | 2014-08-27 |
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