CN103873076A - High-power medium wave transmitter and parallel operation control method - Google Patents
High-power medium wave transmitter and parallel operation control method Download PDFInfo
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- CN103873076A CN103873076A CN201210545742.3A CN201210545742A CN103873076A CN 103873076 A CN103873076 A CN 103873076A CN 201210545742 A CN201210545742 A CN 201210545742A CN 103873076 A CN103873076 A CN 103873076A
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Abstract
The invention provides a high-power medium wave transmitter and a parallel operation control method, wherein the high-power medium wave transmitter comprises N power amplification units, a parallel operation network unit and a transmitter control unit, wherein the parallel operation network unit is respectively connected with the N power amplification units and respectively provides radio frequency paths for the N power amplification units, the transmitter control unit is respectively connected with the N power amplification units and the parallel connection network unit, when the starting-up is needed, the transmitter control unit carries out transmitter initialization operation and detects the current state of the transmitter, when that the current state of the transmitter meets the transmitter starting-up condition is detected, the corresponding number of power amplification units are controlled according to the preset n parallel operation mode, and meanwhile, the starting-up is carried out, so the transmitter operates in the preset n parallel operation mode; after the normal starting-up, the real-time detection is carried out on the parallel operation network unit and each power amplification unit, and the work mode switching processing is carried according to the detected fault types, wherein N is greater than or equal to 2, and n is greater than 0 but equal to or smaller than N. The high-power medium wave transmitter and the parallel operation control method have the advantages that the parallel operation control mode is simplified, in addition, the parallel operation control performance is improved, and in addition, the phenomenon of parallel operation output power unbalance is avoided.
Description
Technical field
The present invention relates to the medium wave broadcast communication technology, particularly relate to a kind of high-power medium wave transmitter based on parallel operation control and the parallel operation control method of high-power medium wave transmitter.
Background technology
Medium wave (Medium Wave, MW) broadcast adopts amplitude modulation (Amplitude Modulation) mode conventionally.In actual applications, the usually said AM wave band of people just refers to medium wave broadcast.
In the existing medium wave broadcast communication technology; need to configure high-power transmitter; broadcast to realize program; but; because high-power transmitter exists problems such as being difficult for the manufacturing, therefore, conventionally can adopt the low power transmitter (being power amplifier unit) of two or more quantity; and form high-power transmitter by parallel operation mode, to meet the high-power mission need of medium wave broadcast communication.In addition, each low power transmitter also can work alone.
For the high-power transmitter being formed by multiple low power transmitters, need to control each low power transmitter, be parallel operation control, to guarantee as much as possible the output balance of each low power transmitter, avoid output imbalance to cause damage to transmitter, and, should carry out underpower broadcast.
Inventor finds realizing in process of the present invention: existing parallel operation control mode exists the problems such as the unstable and parallel operation power output imbalance of control point dispersion, control procedure complexity, control performance, thereby has affected reliability and the fail safe of transmitter.
Because the technical problem that existing parallel operation control mode exists, practical experience and the professional knowledge of the inventor based on being engaged in this type of product design manufacture and enriching for many years, and the utilization of cooperation scientific principle, actively research and innovation in addition, to founding a kind of implementation method and device of the high-power medium wave transmitter based on parallel operation control, can overcome the problem that existing parallel operation control mode exists, make it have more practicality.Through continuous research and design, and through repeatedly studying sample and improvement, finally create the present invention who has practical value.
Summary of the invention
Main purpose of the present invention is, overcome the problem that existing parallel operation control mode exists, and a kind of new high-power medium wave transmitter and parallel operation control method be provided, problem to be solved is, simplify parallel operation control mode, improve parallel operation control performance, and avoid as much as possible occurring the unbalanced phenomenon of parallel operation power output.
Object of the present invention and solve its technical problem and can adopt following technical scheme to realize.
A kind of high-power medium wave transmitter based on parallel operation control proposing according to the present invention, comprising: N power amplifier unit, and the input of each power amplifier unit is all connected with digital delay line, and is connected with the output of exciter by described digital delay line; Parallel operation network element, is all connected with N power amplifier unit, is used to a described N power amplifier unit that radio-frequency path is provided respectively, and each power amplifier unit is connected with transmitting antenna or is connected or ground connection with dummy load by its corresponding radio-frequency path; Transmitter control unit, is connected respectively with a described N power amplifier unit by control line, and is connected with described parallel operation network element by I/O interface; Transmitter control unit is used for, in the time that needs are started shooting, carry out the initialization operation of transmitter, and detect the current state of transmitter, in the time that the current state that detects transmitter meets transmitter-on condition, start shooting according to the power amplifier unit of default n parallel operation pattern control respective numbers, and the power amplifier unit of controlling respective numbers operates in default n parallel operation pattern simultaneously; After normal boot-strap, described parallel operation network element and each power amplifier unit are detected respectively in real time, and carry out mode of operation hand-off process according to detecting fault type; Wherein, described N >=2,0<n≤N.
The parallel operation control method of a kind of high-power medium wave transmitter proposing according to the present invention, comprise: transmitter control unit is connected respectively with N power amplifier unit by control line, and be connected with parallel operation network element by I/O interface, and parallel operation network element is all connected with N power amplifier unit, and provide respectively radio-frequency path for N power amplifier unit, each power amplifier unit is connected with transmitting antenna or is connected or ground connection with dummy load by its corresponding radio-frequency path, the input of each power amplifier unit is all connected with digital delay line, and be connected with the output of exciter by described digital delay line, the method comprises the steps: that, in the time that needs are started shooting, described transmitter control unit carries out the initialization operation of transmitter, and detects the current state of transmitter, in the time that the current state that detects transmitter meets transmitter-on condition, start shooting according to the power amplifier unit of default n parallel operation pattern control respective numbers, and the power amplifier unit of controlling respective numbers operates in default n parallel operation pattern simultaneously, after normal boot-strap, described transmitter control unit detects respectively in real time to described parallel operation network element and each power amplifier unit, and carries out mode of operation hand-off process according to detecting fault type, wherein, described N >=2,0<n≤N.
By technique scheme, high-power medium wave transmitter of the present invention and parallel operation control method at least have following advantages and beneficial effect: transmitter control unit of the present invention can be according to the concrete condition of transmitter, control transmitter and work in various modes, simplify parallel operation control operation, improve parallel operation control performance, and avoid the unbalanced phenomenon of parallel operation power output, make transmitter that stable parallel operation power output can be provided, thereby the present invention improve reliability and the fail safe of transmitter.
In sum, the present invention has significant progress technically, and has significantly positive technique effect, is really a new and innovative, progressive, practical new design.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technological means of the present invention, and can be implemented according to the content of specification, and for above and other object of the present invention, feature and advantage can be become apparent, below especially exemplified by preferred embodiment, and coordinate Figure of description, be described in detail as follows.
Accompanying drawing explanation
Fig. 1 is the structural representation of high-power medium wave transmitter of the present invention;
Fig. 2 is the parallel operation control flow chart of high-power medium wave transmitter of the present invention;
Fig. 3 is of the present invention for first kind Fault Control flow chart;
Fig. 4 is of the present invention for Second Type Fault Control flow chart;
Fig. 5 is of the present invention for the 3rd type Fault Control flow chart.
Embodiment
Technological means and effect of taking for reaching predetermined goal of the invention for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, to the high-power medium wave transmitter proposing according to the present invention and embodiment, structure, feature and effect thereof of parallel operation control method thereof, be described in detail as follows.
The parallel operation three elements that the parallel operation control of high-power medium wave transmitter of the present invention is followed are specially: key element one, parallel operation radio frequency in load is wanted same-phase; Key element two, parallel operation impedance amplitude and envelope in load will equate (or very approaching); The audio frequency that key element three, parallel operation are used is answered homophase.Only follow this three key elements, the modulated wave of parallel operation could effectively superpose.
The structure of the high-power medium wave transmitter based on parallel operation control of the present invention as shown in Figure 1.
In Fig. 1, high-power medium wave transmitter mainly comprises: transmitter control unit 1, parallel operation network element 2 and N(N >=2) individual power amplifier unit 3.Wherein, transmitter control unit 1 is connected respectively with parallel operation network element 2 and N power amplifier unit 3, if transmitter control unit 1 is by Control Link(control line) be connected with each power amplifier unit 3, to carry out information interaction with each power amplifier unit 3, and be connected with parallel operation network element 2 by I/O interface, to carry out the collection of data and the output of controlled quentity controlled variable by I/O interface.In addition, in order to guarantee the synchronous opening and closing of N power amplifier unit 3, the network between transmitter control unit 1 and each power amplifier unit 3 is connected the communication frequency that preferably adopts 2MHz.
Transmitter control unit 1 is mainly used in realizing the parallel operation control of high-power medium wave transmitter, makes transmitter can different in the situation that, be switched to different mode of operations.That is to say, transmitter control unit 1 can the each power amplifier unit 3 of Real-Time Monitoring and the state of parallel operation network 2, and according to the state information of its Real-time Collection, each power amplifier unit 3 and parallel operation network element 2 is controlled.The mode of operation here can comprise: N parallel operation pattern, N-1 parallel operation pattern, N-2 parallel operation pattern (in the situation that of N>2) ... and shutdown mode etc.
Below the parallel operation control mode of transmitter control unit 1 is illustrated.
First, at transmitter under off-mode, when transmitter control unit 1 need to be started shooting (power-on command that the transmission of connected terminal comes as received or transmitter because of the fault occurring be closed etc.) determining, carry out the initialization operation (as the S200 in Fig. 2) of transmitter, this initialization operation can be for arranging the configuration parameter etc. of each parts; Afterwards, transmitter control unit 1 detects the current state (as the S210 in Fig. 2) of transmitter, as detect and the door switch of rack whether closure and mode of operation operating key put in place etc.; And judge transmitter whether normal (whether meeting transmitting compressor start up condition, as the S220 in Fig. 2) according to testing result; In the time that the current state that detects transmitter meets transmitter-on condition, transmitter control unit 1 is according to the power amplifier unit 3 of default n parallel operation pattern control respective numbers start shooting (as the S230 in Fig. 2) simultaneously, and control n power amplifier unit 3 and operate in n parallel operation pattern and (start shooting as controlled all power amplifier units 3 simultaneously, and in N parallel operation pattern etc.), and do not fall power control, thereby the power output of transmitter is specially: the synthetic power of n power amplifier unit 3.
Above-mentioned and rack refers to the cabinet that accommodates N road 90 and spend phase-shift network and N group and intercept resistance.
The span of said n is: 0<n≤N, that is to say, and in the time of start, can be that multiple power amplifier units 3 are in running order together, can be also only a power amplifier unit 3 is in running order.
A concrete example, is 3 at the quantity N of the included all power amplifier units 3 of high-power medium wave transmitter, and default mode of operation can be N parallel operation pattern, N-1 parallel operation pattern or N-2 parallel operation pattern; Like this, transmitter control unit 1 can be started shooting according to N power amplifier unit 3 of default mode of operation control simultaneously, and controls N power amplifier unit 3 and operate in N parallel operation pattern; Also can control N-1 power amplifier unit 3 and start shooting simultaneously, and control N-1 power amplifier unit 3 and operate in N-1 parallel operation pattern; Can also control N-2 power amplifier unit 3 and start shooting, and control N-2 power amplifier unit 3 and operate in N-2 parallel operation pattern.
Secondly, after transmitter normal boot-strap, transmitter control unit 1 carries out respectively real-time fault detect to parallel operation network element 2 and each power amplifier unit 3, in the time detecting that transmitter exists fault, the fault detecting is carried out to mark (as fault flag etc. is set), and determine the fault type (as the S240 in Fig. 2) under this fault, thereby carry out corresponding mode of operation handover operation.Be not (as 280 in Fig. 2) when fault of transmitter in testing result, do not carry out and fall the operation such as power or pattern switching, but continue to carry out fault detect.
A concrete example, as shown in accompanying drawing 2 and accompanying drawing 3, no matter be that transmitter is in N parallel operation pattern or in N-1 parallel operation pattern or other parallel operation patterns, transmitter control unit 1 is in the time detecting transmitter and have first kind fault (250 in Fig. 2), should keep the current mode of operation of transmitter, and control transmitter downrating (251 in Fig. 2).That is to say, maintain the current parallel operation pattern of transmitter and do not change, transmitter is carried out to the power operation of falling of different brackets, make its underpower work under work at present pattern.
Above-mentioned first kind fault mainly comprise following at least one: electric arc sparking, standing-wave ratio exceed predetermined standing-wave ratio threshold value (as 1.2) and and rack deficiency in draught.
For example, transmitter control unit 1 is in the time that the number of times that detects electric arc sparking in the first predetermined time interval reaches or exceedes pre-determined number, and the power controlling transmitter falls 3dB(as shown in the leftmost side branch in Fig. 3).
Again for example, in transmitter control unit 1, store multiple frequency threshold value, and the size of power falls in each frequency threshold value correspondence accordingly, transmitter control unit 1 detects in the second predetermined time interval, standing-wave ratio exceedes the number of times of predetermined standing-wave ratio threshold value (as 1.2), and the frequency threshold value of this number of times detecting and its storage is compared, if reach or exceed certain frequency threshold value, adopt this frequency threshold value corresponding the size of power is fallen to power control to transmitter, as comprised falling power: fall 0.5dB, 1dB, 2dB, in the situation of 3dB and five grades of 6dB, in the time that the number of times detecting exceedes first frequency threshold value, the power output of transmitter is reduced to 0.5dB, and in the time that the number of times detecting exceedes second frequency threshold value, the power output of transmitter is reduced to 1dB, in the time that the number of times detecting exceedes the 3rd frequency threshold value, the power output of transmitter is reduced to 2dB, in the time that the number of times detecting exceedes the 4th frequency threshold value, the power output of transmitter is reduced to 3dB, in the time that the number of times detecting exceedes the 5th frequency threshold value, the power output of transmitter is reduced to 6dB(as shown in the medial fascicle of Fig. 3).Above-mentioned the first frequency threshold value to the five frequency threshold value are to be listed as according to in-line arrangement from small to large.
Again for example, transmitter control unit 1 detect accommodate power amplifier unit and rack while there is the phenomenon of deficiency in draught, the power output of transmitter is reduced to 6dB(as shown in the rightmost side branch of Fig. 3).
The example that another is concrete, as shown in accompanying drawing 2 and accompanying drawing 4, transmitter control unit 1 carries out respectively real-time fault detection to parallel operation network element 2 and each power amplifier unit 3, the information detecting in basis is determined transmitter and is had Second Type fault (as 260 in Fig. 2), and transmitter is current in N parallel operation pattern in the situation that, the control operation that transmitter control unit 1 is carried out comprises: first locking inspiriting (as 261 in Fig. 2), close again corresponding power amplifier unit 3, and control N power amplifier unit 3 and operate in N-1 parallel operation pattern (as shown in 262 in Fig. 2 and Fig. 4).Namely, under N parallel operation pattern, can, by turn-offing corresponding power amplifier unit 3, automatically switch to N-1 parallel operation pattern, make transmitter in the situation that not being off the air, output N-1 power doubly.
Above-mentioned Equations of The Second Kind fault can comprise following at least one: one of them power amplifier unit 3 breaks down, one of them power amplifier unit 3 occur in the unmatched phenomenon of power output and parallel operation network element 2 wherein one group intercept the obstruct electric current of resistance and exceed predetermined current threshold (as shown in Figure 4).
The 3rd concrete example, as shown in accompanying drawing 2 and accompanying drawing 5, transmitter control unit 1, in the time detecting transmitter existence the 3rd type fault (as 270 in Fig. 2), does not carry out pattern switching, and directly closes transmitter (as shown in 271 in Fig. 2).
The 3rd above-mentioned type fault comprise following at least one: two or more power amplifier units 3 break down, the power output of two or more power amplifier unit exists and do not mate in phenomenon and parallel operation network element two groups or the obstruct electric current of obstruct resistance more than two and all exceed predetermined current threshold.
Parallel operation network element 2 is mainly used in providing respectively radio-frequency path for N power amplifier unit, thereby each power amplifier unit 3 can be connected with transmitting antenna for the corresponding radio-frequency path that it provides by parallel operation network element 2, also can be connected with dummy load, can also be grounded.
Parallel operation network element 2 can provide corresponding radio-frequency path for each power amplifier unit 3 according to the control of emission controlling unit 1.
Parallel operation network element 2 can specifically comprise: phase-shift network is spent on N road 90, thereby a road 90 is spent phase-shift network and is connected with a power amplifier unit 3.
Each road phase-shift network all can comprise: one group intercepts resistance and one group of current detecting equipment.Current detecting equipment is connected respectively with obstruct resistance and transmitter control unit, and current detecting equipment is used for the obstruct electric current that intercepts resistance detecting, and the obstruct current information detecting is transferred to emission controlling unit 1.
The input of each power amplifier unit 3 is all connected with digital delay line, and power amplifier unit 3 is connected with the output of exciter by connected digital delay line.
The control command that power amplifier unit 3 is mainly used in receiving according to it is carried out corresponding operation.Power amplifier unit 3 can be operated in N parallel operation pattern or N-1 parallel operation pattern according to the control of transmitter control unit 1.N-1 parallel operation pattern is that one of them power amplifier unit 3 is connected dummy load.
For the transmitter of carrying out parallel operation, should require the amplitude of the radio frequency output signal of the power amplifier unit 3 of each parallel operation to equate, and phase place is identical, for this reason, the relevant parts of the power amplifier unit 3 of parallel operation will be accomplished consistent with circuit as far as possible.In order to guarantee that the radio frequency of all power cells 3 exports all equivalence and homophase, need to control adjustment to digital delay line, to adjust the phase place of the radiofrequency signal that power amplifier unit 3 exports, thereby can make each group of obstruct electric current that intercepts resistance reach minimum, i.e. I
s=I
a+ I
b+ I
c, and I
s≈ 0 or be minimum value, to realize homophase.
Digital delay line can pass through switch regulating and controlling, and every group of switch is made up of the binary code of 6 bits, and high 2 bits are coarse adjustment, and low 4 bits are fine tuning.High 2 bits can adopt toggle switch to realize phase place coarse adjustment; Because the variation of coarse adjustment is larger, therefore, after first tune machine is set, conventionally no longer carry out coarse adjustment.Low 4 bits can adopt rotation toggle switch to control.In addition, digital delay line can be adjusted by transmitting control signal according to testing result by transmitter control unit 1; If transmitter control unit 1 is according to the obstruct electric current I detecting
s, I
a, I
band I
cautomatically regulate the low 4 of digital delay line, a concrete adjustment process is: according to I
a, I
band I
csize sequence, first adjust and intercept the larger power amplifier unit of electric current, if in the time adjusting phase place, intercept electric current and increase, it is anti-that phase directional is adjusted in explanation.Transmitter control unit 1 is adjusted the digital delay line of power amplifier unit 3 correspondences repeatedly by sending corresponding control information, finally can make to intercept electric current I
slevel off to zero, thereby represent that phase place mixes up, digital delay line is in " constant amplitude homophase " position.
Above-mentioned digital delay line can adopt RF delay line, the minimum binary coding of this RF delay line is that " 000001 " corresponding amount of delay is 3ns, and maximum binary coding is that the corresponding amount of delay of " 111111 " (corresponding decimal system 63) (being greatest combined delay time) is=63 × 3=189ns.The binary coding of RF delay line contrasts as described in Table 1 with amount of delay.
Table 1
| Binary coding | Decimal number | Amount of delay |
| 000001 | 1 | 1×3=3ns |
| 000010 | 2 | 2×3=6ns |
| 000011 | 3 | 3×3=9ns |
| 000100 | 4 | 4×3=12ns |
| ... | ? | ... |
| 111111 | 63 | 63×3=189ns |
The crystal oscillator frequency of setting current transmitter is f(kHz), cycle T=1/f, equals 360 degree in one week, and 1ns is equivalent to 360 degree/T, and 3ns is equivalent to 3 × 360 degree/T, greatest combined phase shift=189 × 360/T.In addition,, because radio frequency output can be anti-phase, therefore, greatest combined phase shift can double.For several typical frequencies, phase shift is as shown in table 2 below.
Table 2
The above is only preferred embodiment of the present invention, not the present invention is done to any pro forma restriction, although the present invention discloses as above with preferred embodiment, but not in order to limit technology of the present invention, any those skilled in the art are not departing within the scope of technical solution of the present invention, when can utilizing the technology contents of above-mentioned announcement to make a little change or being modified to the equivalent embodiment of equivalent variations, in every case be the content that does not depart from technical solution of the present invention, any simple modification of above embodiment being done according to technical spirit of the present invention, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (10)
1. the high-power medium wave transmitter based on parallel operation control, is characterized in that, comprising:
N power amplifier unit, the input of each power amplifier unit is all connected with digital delay line, and is connected with the output of exciter by described digital delay line;
Parallel operation network element, is all connected with a described N power amplifier unit, is used to a described N power amplifier unit that radio-frequency path is provided respectively, and each power amplifier unit is connected with transmitting antenna or is connected or ground connection with dummy load by its corresponding radio-frequency path;
Transmitter control unit, is connected respectively with a described N power amplifier unit by control line, and is connected with described parallel operation network element by I/O interface;
Described transmitter control unit is used for, in the time that needs are started shooting, carry out the initialization operation of transmitter, and detect the current state of transmitter, in the time that the current state that detects transmitter meets transmitter-on condition, start shooting according to the power amplifier unit of default n parallel operation pattern control respective numbers, and the power amplifier unit of controlling respective numbers operates in default n parallel operation pattern simultaneously; After normal boot-strap, described parallel operation network element and each power amplifier unit are detected respectively in real time, and carry out mode of operation hand-off process according to detecting fault type;
Wherein, described N >=2,0<n≤N.
2. the high-power medium wave transmitter based on parallel operation control as claimed in claim 1, is characterized in that, described parallel operation network element comprises: phase-shift network is spent on N road 90, and a road 90 is spent phase-shift network and is connected with a power amplifier unit;
Described 90 degree phase shifts comprise: N group intercepts resistance and N group current detecting equipment, and described current detecting equipment is connected respectively with obstruct resistance and transmitter control unit.
3. the high-power medium wave transmitter based on parallel operation control as claimed in claim 1, is characterized in that, described transmitter control unit, in the time detecting transmitter and have first kind fault, keeps transmitter present mode, and controls transmitter downrating;
Described first kind fault comprise following at least one: electric arc sparking, standing-wave ratio exceed predetermined standing-wave ratio threshold value and accommodate N road 90 spends phase-shift network and N group intercept resistance and rack deficiency in draught.
4. the high-power medium wave transmitter based on parallel operation control as claimed in claim 1, it is characterized in that, transmitter control unit is in the time detecting transmitter and exist Second Type fault and work at present pattern to be N parallel operation pattern, locking inspiriting, close corresponding power amplifier unit, and control N power amplifier unit and operate in N-1 parallel operation pattern:
Described Equations of The Second Kind fault comprise following at least one: the power output of a power amplifier unit fault, a power amplifier unit do not mate and parallel operation network element in one group intercept the obstruct electric current of resistance and reach or exceed predetermined current threshold.
5. the high-power medium wave transmitter based on parallel operation control as claimed in claim 1 or 2 or 3 or 4, is characterized in that, described transmitter control unit, in the time detecting transmitter and have the 3rd type fault, is closed transmitter;
Described the 3rd type fault comprise following at least one: the power output of two or more power amplifier unit faults, two or more power amplifier units do not mate and parallel operation network element in two groups or obstruct electric current more than two exceed predetermined current threshold.
6. the parallel operation control method of a high-power medium wave transmitter, it is characterized in that, transmitter control unit is connected respectively with N power amplifier unit by control line, and be connected with parallel operation network element by I/O interface, and parallel operation network element is all connected with N power amplifier unit, and provide respectively radio-frequency path for N power amplifier unit, each power amplifier unit is connected with transmitting antenna or is connected or ground connection with dummy load by its corresponding radio-frequency path, the input of each power amplifier unit is all connected with digital delay line, and is connected with the output of exciter by described digital delay line;
Described method comprises the steps:
In the time that needs are started shooting, described transmitter control unit carries out the initialization operation of transmitter, and detects the current state of transmitter;
In the time that the current state that detects transmitter meets transmitter-on condition, start shooting according to the power amplifier unit of default n parallel operation pattern control respective numbers, and the power amplifier unit of controlling respective numbers operates in default n parallel operation pattern simultaneously;
After normal boot-strap, described transmitter control unit detects respectively in real time to described parallel operation network element and each power amplifier unit, and carries out mode of operation hand-off process according to detecting fault type;
Wherein, described N >=2,0<n≤N.
7. the parallel operation control method of high-power medium wave transmitter as claimed in claim 6, is characterized in that, described basis detects fault type and carries out mode of operation hand-off process and comprise:
Transmitter control unit, in the time detecting transmitter and have first kind fault, keeps transmitter present mode, and controls transmitter downrating;
Described first kind fault comprise following at least one: electric arc sparking, standing-wave ratio exceed predetermined standing-wave ratio threshold value and accommodate N road 90 spends phase-shift network and N group intercept resistance and rack deficiency in draught.
8. the parallel operation control method of high-power medium wave transmitter as claimed in claim 7, is characterized in that, described in control transmitter downrating and comprise following at least one step:
Described transmitter control unit reaches or exceedes pre-determined number detecting in the first predetermined time interval electric arc sparking, and 3dB falls in the power controlling transmitter;
Described predetermined standing-wave ratio threshold value comprises the threshold value of five different brackets, the corresponding pre-determined number of the threshold value of each grade and fall magnitude of power, described transmitter control unit is in the time detecting the second predetermined time interval standing internal wave and reach or exceed corresponding pre-determined number than the number of times reaching or exceed the threshold value of predetermine level, and corresponding power falls in the power controlling transmitter;
Described transmitter control unit is detecting and when rack deficiency in draught, 6dB falls in the power controlling transmitter.
9. the parallel operation control method of high-power medium wave transmitter as claimed in claim 6, is characterized in that, described basis detects fault type and carries out mode of operation hand-off process and comprise:
Transmitter control unit is in the time detecting transmitter and exist Second Type fault and work at present pattern to be N parallel operation pattern, and locking inspiriting, closes corresponding power amplifier unit, and controls N power amplifier unit and operate in N-1 parallel operation pattern:
Described Equations of The Second Kind fault comprise following at least one: the power output of a power amplifier unit fault, a power amplifier unit do not mate and parallel operation network element in one group intercept electric current and reach or exceed predetermined current threshold;
And/or
Described basis detects fault type and carries out mode of operation hand-off process and comprise:
Transmitter control unit, in the time detecting transmitter existence the 3rd type fault, is closed transmitter;
Wherein, described the 3rd type fault comprise following at least one: the power output of two or more power amplifier unit faults, two or more power amplifier units do not mate and parallel operation network element in two groups or obstruct electric current more than two exceed predetermined current threshold.
10. the parallel operation control method of the high-power medium wave transmitter as described in claim 6 or 7 or 8 or 9, is characterized in that, described method also comprises:
Transmitter control unit is adjusted the phase place of digital delay line by sending control information, be bordering on minimum value to guarantee that the summation of the obstruct electric current in each parallel operation network element is driven.
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|---|---|---|---|---|
| CN114124117A (en) * | 2021-11-08 | 2022-03-01 | 北京北广科技股份有限公司 | Radio frequency signal phase automatic control method and system of parallel operation system |
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Application publication date: 20140618 |