CN102231625B - Phase control signal-generator and phase control method - Google Patents
Phase control signal-generator and phase control method Download PDFInfo
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- CN102231625B CN102231625B CN 201110072076 CN201110072076A CN102231625B CN 102231625 B CN102231625 B CN 102231625B CN 201110072076 CN201110072076 CN 201110072076 CN 201110072076 A CN201110072076 A CN 201110072076A CN 102231625 B CN102231625 B CN 102231625B
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Abstract
The invention provides a phase control signal-generator and a phase control method. The phase control signal-generator comprises a plurality of basic signal generation units. Each basic signal generation unit comprises a controllable phase shift signal generation circuit, an amplitude control and drive circuit and a single channel- multiplex signal adapter which are in an electric signal connection in order. The controllable phase shift signal generation circuit generates a signal possessing certain phase shift. The amplitude control and drive circuit is used for controlling amplitude of an output signal. The single channel- multiplex signal adapter taps a single channel which is generated by the controllable phase shift signal generation circuit and goes through the amplitude control and drive circuit to same multiplex signals which are corresponding to different input terminal of a detected multi-beam system. The phase control signal-generator and the phase control method can be used for debugging and measurement of a wave beam formation circuit or a wave beam formation algorithm by various multi-beam systems.
Description
Technical field
What the present invention relates to is a kind of signal generation device, the present invention also relates to a kind of phase control method.
Background technology
In sonar peculiar to vessel, wave beam formation system occupies important status.And the measurement of equipment beam direction is often needed to produce the multiple signals identical with equipment input primitive number (port number) and the phase place difference of each signal.This just needs an adjustable multipath signal source of phase place difference, and such equipment is often huger, especially in the high-resolution sonar.Because the primitive number of high-resolution sonar is more, can reach hundreds of sometimes, the way of its signal source reaches hundreds of, and signal source and equipment are huge equally.
At present domestic and international power amplifier control mode can be referring to " D genus audio power amplifier control mode summaries " such as Gong Wei, University Of Chongqing's journal, 2003.02.P117～122.The DC-DC converter can be referring to " based on the designs of the continuous rearrangeable switch power supply of monolithic processor controlled output " such as Chen Nianjun, electrical applications, 2006 years the 25th volume the 4th phase .P116～118.This design of academic dissertation " development in phase place controllable signal source " can only produce 4 road signals.And adopt phase control method of the present invention to reduce the method for signal source way, do not see the report of any form documents and materials as yet.
Summary of the invention
The purpose of this invention is to provide the phased signal generator that a kind of scale that can make signal source reduces greatly.The present invention also aims to provide a kind of phase control method.
The object of the present invention is achieved like this:
Phased signal generator of the present invention is made of a plurality of baseband signal generation units, and each baseband signal generation unit comprises controllable phase shift signal generation unit, amplitude control and drive circuit and single channel-multiple signals adapter again; Controllable phase shift signal generation unit, amplitude control and drive circuit, single channel-multiple signals adapter signal of telecommunication successively connect; Controllable phase shift signal generation unit produces the signal with certain phase shift; Amplitude control and drive circuit are used for controlling the amplitude of output signal, and driving force is provided; That single channel-multiple signals adapter produces controllable phase shift signal generation unit and be connected into identical multiple signals through the one-channel signal branch of amplitude control and drive circuit, these multiple signals are corresponding to the different input of tested multiple-beam system.
The number of baseband signal generation unit equals to want the direction number of analog echo signal to subtract one.For example want to simulate the multi-path echo signal of 5 directions, need 4 baseband signal generation units; Need 8 baseband signal generation units if will simulate the echo-signal of 9 directions.
Controllable phase shift signal generation unit produce a phase shift be 0 or
Sinusoidal signal, m=1 wherein, 2,, the number of baseband signal generation unit equals to want the direction number of analog echo signal to subtract one, when the direction number of wanting analog echo signal is more, m increases accordingly, and the way of the baseband signal generation unit that needs also can increase thereupon.
Phase control method of the present invention is:
The direction number of analog echo signal is determined the way of baseband signal generation unit as required, constitute the phased signal generator, each baseband signal generation unit comprises controllable phase shift signal generation unit, amplitude control and drive circuit and single channel-multiple signals adapter; Utilize that single channel-multiple signals adapter in each this signal of roadbed generation unit produces controllable phase shift signal generation unit and be connected into identical multiple signals through the one-channel signal branch of amplitude control and drive circuit, described identical multiple signals correspondence the input of tested multiple-beam system; When the phase difference of two adjacent controllable phase shift signal generation units is 0, then simulate the dead ahead to 0 ° echo-signal; When the phase difference of two adjacent controllable phase shift signal generation units be pi/2 or-during pi/2, then simulation
Or
Echo-signal on the radian direction; When the phase difference of two adjacent controllable phase shift signal generation units be π or-during π, then simulation
Or
Echo-signal on the radian direction; By changing the initial phase shift of each road controllable phase shift signal generation unit, the echo-signal of simulation all directions.
The signal that baseband signal generation unit of the present invention produces is continuous signal or CW pulse signal.
The phased signal source can also utilize reverse operational amplifier, the echo-signal of analogue phase difference π, and the quantity of baseband signal generation unit 1 can reduce half more like this, namely uses 2
M-1Individual baseband signal generation unit 1 can produce simulation 2
mTens even hundreds of road echo-signal of+1 direction.
Operation principle of the present invention is:
The present invention utilizes phased principle, and the echo-signal direction that signal source is simulated is fixed on some specific directions, makes the phase difference of adjacent 2 tunnel echo-signals be
Relation, like this, can realize the echo-signal of the different phase shifts of simulation multichannel with a spot of signal generating circuit, make the scale in this phased signal source reduce greatly, several baseband signal generation units can be used as tens even the phased signal on hundreds of road.
For the multiple-beam system that n primitive arranged, its signal source of echo-signal of simulating different directions need produce n the signal that initial phase is different, but these initial phases have periodic repetition in some direction, utilize this point, n road signal can be reduced to 4 the tunnel, the 8 tunnel, the 16 tunnel etc.
When the phase difference of the adjacent primitive echo-signal of n unit line array is
The time, corresponding signal incident wave direction is
Wherein c is signal velocity, and d is the distance of adjacent primitive, and f is signal frequency.The phase difference that namely needs only two baseband signal generation units, 1 generation signals is
M can get 1 or get 2, or gets 3 ..., 2
m≤ n is then every 2
m(the every increase by 2 of primitive sequence number of individual primitive
m, the phase place of corresponding echo-signal is identical) the phase place of echo-signal identical, therefore, can be with each identical road echo-signal of a baseband signal generation unit 1 simulation generation phase place.
If get m=2, the phase difference of adjacent primitive echo-signal is ± pi/2, note signal road number is 1,2,3 ..., n, and the first phase of establishing 1 road signal is 0, then 2,3,4,5,6 ..., the n road first phase for be respectively ± pi/2, ± π, ± 3 pi/2s, ± 2 π, ± (2 π+pi/2) ..., identical every 4 primitive phase of echos.Thus, if with multipath signal source 1,5,9 ... one tunnel (being designated as the A road) signal is merged on the road, with 2,6,10 ... one tunnel (being designated as the B road) signal is merged on the road, with 3,7,11 ... one tunnel (being designated as the C road) signal is merged on the road, with 4,8,12 ... one tunnel (being designated as the D road) signal is merged on the road, and the phase place of A, B, C, D four road signals is controlled.When the phase difference of A, B, C, D four road signals got 0, then as the analog signal input of n primitive multiple-beam system, its Beam-former can form a wave beam in the dead ahead; The phase difference of getting adjacent two paths of signals is ± pi/2, then import as the analog signal of n primitive multiple-beam system, its Beam-former can
Form two wave beams on the direction; The phase difference of getting adjacent two paths of signals is ± π, then import as the analog signal of n primitive multiple-beam system, its Beam-former can
Form two wave beams on the direction; When the adjustable baseband signal generation unit 1 of 4 tunnel phase places, can simulate the echo-signal that realizes 5 directions of n primitive altogether like this.
Advantage of the present invention is: circuit structure is simple, and the little cost of volume is low, and it is convenient to realize.The signal that several baseband signal generation units 1 produce can simulate tens even the echo-signal of a plurality of directions in hundreds of road.Can be used in the various multiple-beam systems wave beam being formed debugging and the measurement of circuit or beamforming algorithm.
In sum, because the present invention has adopted phased-array technique, make this phased signal source can realize the echo-signal of the different phase shifts of simulation multichannel with a spot of signal generating circuit, several baseband signal generation units, can simulate tens even the phased signal on hundreds of road, the scale of signal source is reduced greatly.The present invention can be used for various multiple-beam systems wave beam is formed in the debugging and measurement of circuit or beamforming algorithm.
Description of drawings
Fig. 1 baseband signal generation unit composition frame chart;
Fig. 2 produces the circuit composition frame chart of the analog signal of 5 directions;
Fig. 3 produces the embodiment figure of the analog signal of 5 directions;
Fig. 4 produces the another kind of execution mode figure of the analog signal of 5 directions.
Embodiment
For example the present invention is done more detailed description below in conjunction with accompanying drawing:
In conjunction with Fig. 1 and Fig. 2.Phased signal generator of the present invention is made of a plurality of baseband signal generation units 1, and each baseband signal generation unit comprises controllable phase shift signal generation unit 2, amplitude control and drive circuit 3 and single channel-multiple signals adapter 4 again.Wherein, controllable phase shift signal generation unit, amplitude control and drive circuit, single channel-multiple signals adapter signal of telecommunication connection successively.Controllable phase shift signal generation unit produces the signal with certain phase shift; Amplitude control and drive circuit are used for controlling the amplitude of output signal, and certain driving force is provided; That single channel-multiple signals adapter produces controllable phase shift signal generation unit and be connected into identical multiple signals through the one-channel signal branch of amplitude control and drive circuit, these multiple signals are corresponding to the different input of tested multiple-beam system.The number of baseband signal generation unit equals to want the direction number of analog echo signal to subtract one, for example wants to simulate the multi-path echo signal of 5 directions, needs 4 baseband signal generation units; Need 8 baseband signal generation units if will simulate the echo-signal of 9 directions.
Controllable phase shift signal generation unit 2 for generation of a phase shift be 0 or
Sinusoidal signal, m=1 wherein, 2,, the number of baseband signal generation unit equals to want the direction number of analog echo signal to subtract one, when the direction number of wanting analog echo signal is more, m increases accordingly, and the way of the baseband signal generation unit 1 that needs also can increase thereupon.
Phase control method of the present invention is:
If when needing to produce the analog signal of 5 directions, only need to do 4 baseband signal generation units 1 by accompanying drawing 2, and utilize that single channel-multiple signals adapter 4 produces controllable phase shift signal generation unit 2 and be connected into identical multiple signals through the one-channel signal branch of amplitude control and drive circuit 3, this identical multiple signals correspondence 1 of tested multiple-beam system, 5,9, number input, equally, the signal that other 3 this signal of roadbed generation units 1 produce, be connected on corresponding single channel-multiple signals adapter 4 through the control of separately amplitude and drive circuit 3, the output of single channel-multiple signals adapter 4 respectively corresponding tested multiple- beam system 2,6,10, number input, 3,7,11, number input and 4,8,12, number input.Making the phase difference of two adjacent controllable phase shift signal generation units 2 is 0, then can simulate the dead ahead to the echo-signal of (0 °); The phase difference that makes two adjacent controllable phase shift signal generation units 2 be pi/2 or-pi/2, namely the signal initial phase that produces of 4 controllable phase shift signal generation units 2 be respectively 0, pi/2,2 pi/2s and 3 pi/2s, or 0 ,-pi/2 ,-2 pi/2s and-3 pi/2s, then can simulate
Or
Echo-signal on (radian) direction, the phase difference that makes two adjacent controllable phase shift signal generation units 2 be π or-π, then can simulate
Or
Echo-signal on (radian) direction when 4 this signal of roadbed generation units 1, by changing the initial phase shift of 4 tunnel controllable phase shift signal generation units 2, just can be simulated the echo-signal of 5 directions like this.
If in the time of will producing the signal of 9 directions of simulation, only need do 8 baseband signal generation units 1, and utilize that single channel-multiple signals adapter 4 produces controllable phase shift signal generation unit 2 and be connected into identical multiple signals through the one-channel signal branch of amplitude control and drive circuit 3,8 groups of multiple signals respectively corresponding tested multiple- beam system 1,9,17 ... number input, 2,10,18 ... input, 3,11,19 ... number input, 4,12,20 ... number input.If making the phase difference of 8 tunnel controllable phase shift signal generation units 2 is 0, then can simulate the dead ahead to the echo-signal of (0 °); The phase difference that makes two adjacent controllable phase shift signal generation units 2 be π/4 or-π/4, namely the signal initial phase that produces of 8 controllable phase shift signal generation units 2 be respectively 0, π/4, pi/2,3 π/4, π, 5 π/4,3 pi/2s and 7 π/4, or 0 ,-π/4 ,-pi/2 ,-3 π/4 ,-π ,-5 π/4 ,-3 pi/2s and-7 π/4, then can simulate
Or
Echo-signal on (radian) direction, the phase difference that makes two adjacent controllable phase shift signal generation units 2 are pi/2 (or-pi/2), then can simulate
Or
Echo-signal on (radian) direction, the phase difference that makes two adjacent controllable phase shift signal generation units 2 is 3 π/4 or-3 π/4, then can simulate
Or
Echo-signal on (radian) direction, the phase difference that makes two adjacent controllable phase shift signal generation units 2 be π or-π, then can simulate
Or
Echo-signal on (radian) direction when 8 this signal of roadbed generation units 1, by changing the initial phase shift of 8 tunnel controllable phase shift signal generation units 2, just can be simulated the echo-signal of 9 directions like this.
Equally, if will produce simulation 2
mDuring the signal of+1 direction (m=1,2,3,4 ...), then need 2
mIndividual baseband signal generation unit 1, the output signal of each baseband signal generation unit 1 is connected into identical multiple signals by single channel-multiple signals adapter 4 with the signal branch, and the signal sequence number of the output correspondence of i baseband signal generation unit is i+2
m, i=1,2,3 ..., 2
m, m=1,2,3 ..., 2
m≤ n.When the phase difference of getting between adjacent primitive is
The time, p=0,1,2 ..., 2
M-1-1,2
mIndividual baseband signal generation unit 1 is as the input of the analog signal of n primitive multiple-beam system, its Beam-former can be 0,
Etc. forming 2 on the direction
m+ 1 wave beam.
The rest may be inferred, if having 2
mDuring individual baseband signal generation unit 1, can produce simulation 2
mThe echo-signal of+1 direction, the echo direction of simulation can be by formula
Calculate, wherein, ф is the phase difference of adjacent road signal, and c is signal velocity, and d is the distance of adjacent primitive, and f is signal frequency.The signal that baseband signal generation unit 1 of the present invention produces can be continuous signal, also can be the CW pulse signal.
Described phased signal source can also utilize reverse operational amplifier, the echo-signal of analogue phase difference π, and the quantity of baseband signal generation unit 1 can reduce half more like this, namely uses 2
M-1Individual baseband signal generation unit 1 can produce simulation 2
mTens even hundreds of road echo-signal of+1 direction.
Controllable phase shift signal generation unit 2 can adopt Direct Digital frequency synthesis (DDS) device, also can adopt single-chip microcomputer or digital signal processing chip (DSP); Amplitude control and drive circuit 3 can adopt numerical-control attenuator spare to add operational amplifier or penetrate a grade follower, also can adopt the beneficial amplifying device of variable control to add operational amplifier or penetrate a grade follower, when not high to amplitude requirement, can directly utilize the amplitude control function of Direct Digital frequency synthesis (DDS) device, only need to adopt operational amplifier or penetrate a grade follower to drive and get final product; Single channel-multiple signals adapter 4 can be as required be connected into operational amplifier or the output branch of penetrating grade follower needs the connector of quantity to get final product.If the echo-signal of 9 directions will be provided for 80 tunnel multi-beam sonar system, the array element distance of corresponding transducer is 5mm, operating frequency is 200kHz, get velocity of sound c=1500m/s, when the phase difference that compensates between adjacent array element be 0, ± π/4, ± pi/2, ± 3 π/4, ± just can simulate during π 0 °, ± 10.81 °, ± 22.02 °, ± 34.23 °, ± 80 tunnel echo-signals on 9 directions such as 48.59 °, the type of attachment of circuit is seen accompanying drawing 4.
The present invention utilizes phased principle, the simulation direction of signal source is fixed on echo-signal to be had on the direction of identical phase shift, like this, can realize the echo-signal of the different phase shifts of simulation multichannel with a spot of signal generating circuit, make the scale in this phased signal source reduce greatly, several baseband signal generation units can be used as tens even the phased signal on hundreds of road.The present invention can be used for various multiple-beam systems wave beam is formed in the debugging and measurement of circuit or beamforming algorithm.
Claims (3)
1. a phased signal generator is made of a plurality of baseband signal generation units, it is characterized in that: each baseband signal generation unit comprises controllable phase shift signal generation unit, amplitude control and drive circuit and single channel-multiple signals adapter again; Controllable phase shift signal generation unit, amplitude control and drive circuit, single channel-multiple signals adapter signal of telecommunication successively connect; Controllable phase shift signal generation unit produces the signal with certain phase shift, the phase difference that makes adjacent 2 tunnel echo-signals be 0 or
Sinusoidal signal, m=1 wherein, 2,, the number of baseband signal generation unit equals to want the direction number of analog echo signal to subtract one, when the direction number of wanting analog echo signal is more, m increases accordingly, and the way of the baseband signal generation unit that needs also can increase thereupon; Amplitude control and drive circuit are used for controlling the amplitude of output signal, and driving force is provided; That single channel-multiple signals adapter produces controllable phase shift signal generation unit and be connected into identical multiple signals through the one-channel signal branch of amplitude control and drive circuit, these multiple signals are corresponding to the different input of tested multiple-beam system.
2. phase control method based on the described phased signal generator of claim 1 is characterized in that:
The direction number of analog echo signal is determined the way of baseband signal generation unit as required, constitute the phased signal generator, each baseband signal generation unit comprises controllable phase shift signal generation unit, amplitude control and drive circuit and single channel-multiple signals adapter; Utilize that single channel-multiple signals adapter in each this signal of roadbed generation unit produces controllable phase shift signal generation unit and be connected into identical multiple signals through the one-channel signal branch of amplitude control and drive circuit, described identical multiple signals correspondence the input of tested multiple-beam system; When the phase difference of two adjacent controllable phase shift signal generation units is 0, then simulate the dead ahead to 0 ° echo-signal; When the phase difference of two adjacent controllable phase shift signal generation units be pi/2 or-during pi/2, then simulation
Or
Echo-signal on the radian direction; When the phase difference of two adjacent controllable phase shift signal generation units be π or-during π, then simulation
Or
Echo-signal on the radian direction; By changing the initial phase shift of each road controllable phase shift signal generation unit, simulate the echo-signal of all directions, wherein, c is signal velocity, and d is the distance of adjacent primitive, and f is signal frequency.
3. the phase control method based on the phased signal generator according to claim 2 is characterized in that: the signal that the baseband signal generation unit produces is continuous signal or CW pulse signal.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1775328A (en) * | 2005-12-01 | 2006-05-24 | 上海交通大学 | Wide focal domain phased array focusing ultrasonic transducer exciting bunk |
| CN101862511A (en) * | 2010-05-07 | 2010-10-20 | 上海交通大学 | Multi-channel high precision phase control signal generation device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1775328A (en) * | 2005-12-01 | 2006-05-24 | 上海交通大学 | Wide focal domain phased array focusing ultrasonic transducer exciting bunk |
| CN101862511A (en) * | 2010-05-07 | 2010-10-20 | 上海交通大学 | Multi-channel high precision phase control signal generation device |
Non-Patent Citations (4)
| Title |
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| 《多路相位可控信号源》;蔡磊;《中国优秀硕士论文电子期刊网》;20060601;136-1041 * |
| 《相位可控信号源的研制》;陆凝;《中国优秀硕士论文电子期刊网》;20090501;135-139 * |
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