CN101900778A - Fault self-diagnosis method of matching network and device thereof - Google Patents
Fault self-diagnosis method of matching network and device thereof Download PDFInfo
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- CN101900778A CN101900778A CN2009100852000A CN200910085200A CN101900778A CN 101900778 A CN101900778 A CN 101900778A CN 2009100852000 A CN2009100852000 A CN 2009100852000A CN 200910085200 A CN200910085200 A CN 200910085200A CN 101900778 A CN101900778 A CN 101900778A
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Abstract
The invention relates to a method and a device for detecting circuit fault, in particular to a fault self-diagnosis method of a matching network and a device thereof; the method comprises the following steps: transmitting a signal of resonance frequency to a matching network, conveniently, quickly and accurately detecting a fault relay unit by comparing voltage amplitude V, voltage amplitude I and phase error phi under three states of initial switch position, switched position and returned initial position of the relay.
Description
Technical field
The present invention relates to a kind of fault detection method and device, particularly a kind of matching network fault self-diagnosis method and device.
Background technology
Antenna matching network (abbreviation matching network) is the coalignment of tuning high-power emitting antenna, be also referred to as antenna tuning network, it converts the antenna impedance that changes with frequency of operation and external environment condition to equal transmitter as far as possible output impedance (50 Ω), makes transmitter be transferred to the power maximum of antenna.
The composition of existing matching network mainly is made up of shunt capacitance module 1, series capacitance module 2, series inductance module 3 and antenna capacitance module 4 as shown in Figure 1; Described shunt capacitance module 1 be by a plurality of capacitor C 11, C12 ..., C1n composes in parallel, each electric capacity respectively by be series at separately relay K 11, K12 ..., K1n is connected with network; Described series capacitance module 2 be by a plurality of capacitor C 21, C22 ..., C2n is composed in series, described capacitor C 21, C22 ..., C2n two ends respectively relay K 21 in parallel, K22 ..., K2n; Described series inductance module 3 be by a plurality of inductance L 31, L32 ..., L3n is composed in series, described inductance L 31, L32 ..., L3n two ends respectively relay K 31 in parallel, K32 ..., K3n; Described antenna capacitance module 4 be by a plurality of capacitor C 41, C42 ..., C4n composes in parallel, each electric capacity respectively by relay K 41, K42 ..., K4n is connected with network.Switch by transfer relay is regulated the impedance of matching network, judges to meet the requirements of the resistance value scope whether coupling is good.
In real work, require matching network to be operated in any point in the frequency range, as the shortwave arbitrary Frequency point in 3MHz--30MHz then.Because the uncontinuity between capacitance, the inductance value when each frequency carries out tuning coupling, needs to connect or disconnect a certain relay repeatedly, repeatedly, thereby finally reaches best matching effect.If there is hardware fault in day inner matching network of accent, just need debugs after powering on, and can't check whether inductance or electric capacity in the matching network damage with checking successively that manually relay has non-fault.For a long time, entirely with the machine of accent personnel's experience, need to spend inductance or the electric capacity that several days time just can find out damage for the judgement of inductance that damages or electric capacity sometimes.Accent machine workload is very big, and efficient is extremely low, and needs to consume a large amount of electric energy.
How convenient, fast and accurately in debug process detect power transfer relay or a certain fault inductance, electric capacity is that high-power communication broadcast transmitter presses for one of difficult problem of solution.
Because big, the inefficient deficiency of the existing above-mentioned workload of above-mentioned existing matching network fault detection method, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge, and the utilization of cooperation scientific principle, actively studied innovation, in the hope of founding a kind of new matching network fault self-diagnosis method and device, can improve general existing artificial lookup method, make it have more practicality.Through constantly research, design, and after studying sample and improvement repeatedly, create the present invention who has practical value finally.
Summary of the invention
Fundamental purpose of the present invention is, overcome existing matching network fault and manually search the above-mentioned defective of existence, and provide a kind of matching network fault self-diagnosis method and device, technical matters to be solved is whether to have fault by the relay unit that Computer Control Unit is monitored in the matching network automatically, with the raising debugging efficiency, thereby be suitable for practicality more.Described relay unit comprises relay and the electric capacity or the inductance element that are inserted by this relay control.
The object of the invention to solve the technical problems realizes by the following technical solutions.A kind of matching network fault self-diagnosis method according to the present invention proposes may further comprise the steps:
(1) the resonance frequency f0 of searching matching network;
(2) be that the signal of f0 send matching network with frequency;
(3) write down this state voltage amplitude amplitude V1, current amplitude value I1 and the phase differential Φ 1 between them for the moment;
(4) on off state of the relay among the change measured relay module N, voltage amplitude amplitude V2, current amplitude value I2 when writing down this state two and the phase differential Φ 2 between them;
(5) change the on off state of the relay among the measured relay module N once more, voltage amplitude amplitude V3, current amplitude value I3 when writing down this state three and the phase differential Φ 3 between them;
(6) V, I and the Φ under three kinds of states of comparison;
(6-1) V relatively, if | V1-V3|＜| V1-V2| or | V1-V3|＜| V3-V2| then enter next step, otherwise this relay module N is a malfunctioning module;
(6-2) I relatively, if | I1-I3|＜| I1-I2| or | I1-I3|＜| I3-I2| then enter next step, otherwise this relay module N is a malfunctioning module;
(6-3) Φ relatively, if | Φ 1-Φ 3|＜| Φ 1-Φ 2| or | Φ 1-Φ 3|＜| Φ 3-Φ 2|, this relay module non-fault then, otherwise this relay module N is a malfunctioning module, gets back to (4), carries out the detection of next electrical appliance module N+1.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid matching network fault self-diagnosis method, wherein the resonance frequency f0 of the matching network of the described searching current state of step 1 may further comprise the steps:
1-1 is with the whole short circuits of the capacitor and inductor in the matching network;
1-2 samples, calculates, compares every 0.1MHz in the whole operating frequency range of matching network, seeks the frequency of voltage standing wave ratio (VSWR) minimum;
The voltage standing wave ratio (VSWR) of the described minimum frequency of 1-3 thinks then that below 1.1 this frequency is resonance frequency f0.
Aforesaid matching network fault self-diagnosis method, wherein the resonance frequency f0 of the matching network of the described searching current state of step 1 may further comprise the steps:
1-1 is with the whole short circuits of the capacitor and inductor in the matching network;
1-2 samples, calculates, compares every 0.5MHz in the whole operating frequency range of matching network, seeks the frequency f0 ' of voltage standing wave ratio (VSWR) minimum;
1-3 in the scope of f0 ' ± 0.4MHz, samples, calculates, compares every 0.1MHz again, seeks the frequency of voltage standing wave ratio (VSWR) minimum;
The voltage standing wave ratio (VSWR) of the described minimum frequency of 1-4 thinks then that below 1.1 this frequency is resonance frequency f0.
The object of the invention to solve the technical problems can also adopt following another kind of technical scheme to realize.A kind of matching network fault self-diagnosis method according to the present invention proposes may further comprise the steps:
(1) signal with the optional frequency f1 in the operating frequency range fmin～fmax of matching network send matching network;
(2) write down this state voltage amplitude amplitude Vf11, current amplitude value If11 and the phase differential Φ f11 between them for the moment;
(3) on off state of the relay among the change measured relay module N, voltage amplitude amplitude Vf12, current amplitude value If12 when writing down this state two and the phase differential Φ f12 between them;
(4) change the on off state of the relay among the measured relay module N once more, voltage amplitude amplitude Vf13, current amplitude value If13 when writing down this state three and the phase differential Φ f13 between them;
(5) V, I and the Φ under three kinds of states of comparison;
(5-1) if | Vf11-Vf13|＜| Vf11-Vf12| or
| Vf11-Vf13|＜| Vf13-Vf12| then enter next step, otherwise this relay module N may be malfunctioning module;
(5-2) if | If11-If13|＜| If11-If12| or
| If11-If13|＜| If13-If12| then enter next step, otherwise this relay module N may be malfunctioning module;
(5-3) if | Φ f11-Φ f13|＜| Φ f11-Φ f12| or
| Φ f11-Φ f13|＜| Φ f13-Φ f12|, this relay module non-fault then, otherwise this relay module N is a malfunctioning module.
(6) be that the signal of f2 send matching network with frequency, and f2 and f1 are with working frequency range center symmetry;
(7) write down this state voltage amplitude amplitude Vf21, current amplitude value If21 and the phase differential Φ f21 between them for the moment;
(8) on off state of the relay among the change measured relay module N, voltage amplitude amplitude Vf22, current amplitude value If22 when writing down this state two and the phase differential Φ f22 between them;
(9) change the on off state of the relay among the measured relay module N once more, voltage amplitude amplitude Vf23, current amplitude value If23 when writing down this state three and the phase differential Φ f23 between them;
(10) V, I and the Φ under three kinds of states of comparison, and the result in (5) judges jointly;
(10-1) V relatively, if | Vf21-Vf23|＜| Vf21-Vf22| or
| Vf21-Vf23|＜| Vf23-Vf22|, then enter next step, otherwise check whether this relay module N is malfunctioning module in (5-1), if then this relay module N is a malfunctioning module, if not, then enter next step;
(10-2) I relatively, if | If21-If23|＜| If21-If22| or
| If21-If23|＜| If23-If22|, then enter next step, otherwise check whether this relay module N is malfunctioning module in (5-2), if then this relay module N is a malfunctioning module, if not, then enter next step;
(10-3) Φ relatively, if | Φ f21-Φ f23|＜| Φ f21-Φ f22| or
| Φ f21-Φ f23|＜| Φ f23-Φ f22|, this relay module non-fault then, otherwise check whether this relay module N is malfunctioning module in (5-3), if, then this relay module N is a malfunctioning module, if not, and this relay module N non-fault then, get back to (3), carry out the detection of next electrical appliance module N+1.
The present invention also provides a kind of device that is used for above-mentioned matching network fault self-diagnosis method, comprising input signal source, measurement module, controller, display and interface circuit, described measurement module is located at the input end of described matching network, monitoring input signal flow through voltage amplitude amplitude V, the current amplitude value I of matching network and the phase differential Φ between them; Described controller connects described input signal source, measurement module, display and interface circuit, the debug signal of matching network certain frequency is given in described controller follow procedure control input signals source, the duty of pilot relay unit repeat circuit in regular turn, voltage amplitude amplitude V, current amplitude value I under certain switch different conditions of sending here according to measurement module and the phase differential Φ between them analyze comparison, judge whether this relay unit is trouble unit, with result's storage, and send display to show.
The device of aforesaid matching network fault self-diagnosis method, wherein said input signal source is made of Direct Digital Frequency Synthesizers DDS and power amplifier, described Direct Digital Frequency Synthesizers DDS connects described controller, described controller is controlled described Direct Digital Frequency Synthesizers DDS and is produced stable required frequency signal, and described power amplifier carries out power amplification with the stable frequency signal of Direct Digital Frequency Synthesizers DDS generation and send matching network.
The device of aforesaid matching network fault self-diagnosis method, wherein said controller is a microprocessor microcontroller.
The device of aforesaid matching network fault self-diagnosis method also is in series with wave filter on the relay circuit in the wherein said relay unit.
By technique scheme, matching network fault self-diagnosis method of the present invention and device have following advantage and beneficial effect at least:
1, matching network fault self-diagnosis method of the present invention and device can the convenient and swift hardware faults that detects matching network inside exactly, greatly improved the debugging speed of high-power communication broadcast transmitter.
2, the present invention adopts DDS small power amplifier signal source to send into the required frequency signal of debugging and is in harmonious proportion detections in advance, saves the energy consumption of powerful device accent machine.
In sum, the present invention has above-mentioned plurality of advantages and practical value, no matter it all has bigger improvement on product structure, method or function, obvious improvement is arranged technically, and produced handy and practical effect, and more existing hand inspection matching network hardware has trouble-free method to have the outstanding multinomial effect of enhancement, thus be suitable for practicality more, and have the extensive value of industry, really be a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of instructions, and for above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, below especially exemplified by preferred embodiment, and conjunction with figs., be described in detail as follows.
Description of drawings
Fig. 1 is the matching network structural representation.
Fig. 2 is a kind of implementation step process flow diagram of matching network fault self-diagnosis method of the present invention.
Fig. 3 is the another kind of implementation step process flow diagram of matching network fault self-diagnosis method of the present invention.
Fig. 4 is an apparatus structure synoptic diagram of implementing matching network fault self-diagnosis method of the present invention.
Embodiment
Relevant aforementioned and other technology contents, characteristics and effect of the present invention can be known to present in the following detailed description that cooperates with reference to graphic preferred embodiment.By the explanation of embodiment, when can being to reach technological means that predetermined purpose takes and effect to get one more deeply and concrete understanding to the present invention, yet appended graphic only provide with reference to the usefulness of explanation, be not to be used for the present invention is limited.
Matching network fault self-diagnosis method of the present invention is meant isolated plant is set in matching network, replaces the power transfer relay module of manually searching in the matching network with assembling apparatus, so that quick the replacing saved adjusting machine time.Described relay module is meant, constitutes in shunt capacitance module 1, series capacitance module 2, series inductance module 3 and the antenna capacitance module 4 of matching network the combination of the relay of this element access of electric capacity or inductance element and control or short circuit.Shown in Fig. 1,4, described shunt capacitance module 1 be by a plurality of capacitor C 11, C12 ..., C1n composes in parallel, each electric capacity respectively by be series at separately relay K 11, K12 ..., K1n is connected with network, pilot relay K11, K12 ..., the K1n adhesive be may command C11, C12 ..., C1n inserts matching network; Described series capacitance module 2 be by a plurality of capacitor C 21, C22 ..., C2n is composed in series, described capacitor C 21, C22 ..., C2n two ends respectively relay K 21 in parallel, K22 ..., K2n, pilot relay K21, K22 ..., the K2n adhesive, can distinguish control capacitance C21, C22 ..., C2n is by short circuit; Described series inductance module 3 be by a plurality of inductance L 31, L32 ..., L3n is composed in series, described inductance L 31, L32 ..., L3n two ends respectively relay K 31 in parallel, K32 ..., K3n, pilot relay K31, K32 ..., the K3n adhesive, can control respectively inductance L 31, L32 ..., L3n is by short circuit; Described antenna capacitance module 4 be by a plurality of capacitor C 41, C42 ..., C4n composes in parallel, each electric capacity respectively by relay K 41, K42 ..., K4n is connected with network, pilot relay K41, K42 ..., the K4n adhesive can control capacitance C41, C42 ..., C4n inserts matching network.The matching network of Fig. 1 and Fig. 4 is identical, so the components and parts same numeral.
See also Fig. 2, the flow chart of steps of matching network fault self-diagnosis method of the present invention preferred embodiment may further comprise the steps:
(1) the resonance frequency f0 of searching matching network; Because near tuning-points, sampled value is very sensitive to the minor alteration of matching network.After the method for the resonance frequency f0 of searching matching network is illustrated in.
(2) be that the signal of f0 send matching network with frequency; And the on off state of setting all relays in matching network this moment is a state one.
(3) write down this state voltage amplitude amplitude V1, current amplitude value I1 and the phase differential Φ 1 between them for the moment;
(4) on off state of the relay among the change measured relay module N, voltage amplitude amplitude V2, current amplitude value I2 when writing down this state two and the phase differential Φ 2 between them; Usually relay module N chooses first, and promptly N is 1, then detects successively.
(5) change the on off state of the relay among the measured relay module N once more, voltage amplitude amplitude V3, current amplitude value I3 when writing down this state three and the phase differential Φ 3 between them;
(6) V, I and the Φ under three kinds of states of comparison;
(6-1) if | V1-V3|＜| V1-V2| or | V1-V3|＜| V3-V2| then enter next step, otherwise this relay module N is a malfunctioning module;
(6-2) if | I1-I3|＜| I1-I2| or | I1-I3|＜| I3-I2| then enter next step, otherwise this relay module N is a malfunctioning module;
(6-3) if | Φ 1-Φ 3|＜| Φ 1-Φ 2| or | Φ 1-Φ 3|＜| Φ 3-Φ 2|, this relay module non-fault then, otherwise this relay module N is a malfunctioning module, gets back to (4), carries out the detection of next electrical appliance module N+1.
The resonance frequency f0 of the matching network of the described searching current state of step 1 may further comprise the steps:
1-1 is with the whole short circuits of the capacitor and inductor in the matching network;
1-2 samples, calculates, compares every 0.1MHz in the whole operating frequency range of matching network, seeks the frequency of voltage standing wave ratio (VSWR) minimum;
The voltage standing wave ratio (VSWR) of the described minimum frequency of 1-3 thinks then that below 1.1 this frequency is resonance frequency f0.
Seek number of times for reducing, the resonance frequency f0 of the matching network of described searching current state can also adopt following steps:
1-1 is with the whole short circuits of the capacitor and inductor in the matching network;
1-2 samples, calculates, compares every 0.5MHz in the whole operating frequency range of matching network, seeks the frequency f0 ' of voltage standing wave ratio (VSWR) minimum; Also can be every 1MHz, or other are sampled at interval.
1-3 in the scope of f0 ' ± 0.4MHz, samples, calculates, compares every 0.1MHz again, seeks the frequency of voltage standing wave ratio (VSWR) minimum; If every 1MHz sampling, then again in the scope of ± 0.9MHz, sample, calculate, relatively every 0.1MHz, seek the frequency of voltage standing wave ratio (VSWR) minimum;
The voltage standing wave ratio (VSWR) of the described minimum frequency of 1-4 thinks then that below 1.1 this frequency is resonance frequency f0.
The present invention also provides a kind of method of searching power transfer relay module in day accent networking with optional frequency.As shown in Figure 3, this may further comprise the steps:
(1) signal with the frequency f 1 in the operating frequency range fmin～fmax of matching network send matching network;
(2) write down this state voltage amplitude amplitude Vf11, current amplitude value If11 and the phase differential Φ f11 between them for the moment;
(3) on off state of the relay among the change measured relay module N, voltage amplitude amplitude Vf12, current amplitude value If12 when writing down this state two and the phase differential Φ f12 between them;
(4) change the on off state of the relay among the measured relay module N once more, voltage amplitude amplitude Vf13, current amplitude value If13 when writing down this state three and the phase differential Φ f13 between them;
(5) V, I and the Φ under three kinds of states of comparison;
(5-1) if | Vf11-Vf13|＜| Vf11-Vf12| or
| Vf11-Vf13|＜| Vf13-Vf12| then enter next step, otherwise this relay module N may be malfunctioning module;
(5-2) if | If11-If13|＜| If11-If12| or
| If11-If13|＜| If13-If12| then enter next step, otherwise this relay module N may be malfunctioning module;
(5-3) if | Φ f11-Φ f13|＜| Φ f11-Φ f12| or
| Φ f11-Φ f13|＜| Φ f13-Φ f12|, this relay module non-fault then, otherwise this relay module N is a malfunctioning module.
(6) be that the signal of f2 send matching network with frequency, described f2 and described f1 are with the middle point symmetry of matching network operating frequency range; If f1 is the bottom frequency, then selected f2 should be high-end frequency, and satisfies f1-fmin=fmax-f2; If to embody the influence that the frequency difference detects relay in the whole working range.
(7) write down this state voltage amplitude amplitude Vf21, current amplitude value If21 and the phase differential Φ f21 between them for the moment;
(8) on off state of the relay among the change measured relay module N, voltage amplitude amplitude Vf22, current amplitude value If22 when writing down this state two and the phase differential Φ f22 between them;
(9) change the on off state of the relay among the measured relay module N once more, voltage amplitude amplitude Vf23, current amplitude value If23 when writing down this state three and the phase differential Φ f23 between them;
(10) V, I and the Φ under three kinds of states of comparison, and the result in (5) judges jointly;
(10-1) V relatively, if | Vf21-Vf23|＜| Vf21-Vf22| or
| Vf21-Vf23|＜| Vf23-Vf22|, then enter next step, otherwise check whether this relay module N is malfunctioning module in (5-1), if then this relay module N is a malfunctioning module, if not, then enter next step;
(10-2) I relatively, if | If21-If23|＜| If21-If22| or
| If21-If23|＜| If23-If22|, then enter next step, otherwise check whether this relay module N is malfunctioning module in (5-2), if then this relay module N is a malfunctioning module, if not, then enter next step;
(10-3) Φ relatively, if | Φ f21-Φ f23|＜| Φ f21-Φ f22| or
| Φ f21-Φ f23|＜| Φ f23-Φ f22|, this relay module non-fault then, otherwise check whether this relay module N is malfunctioning module in (5-3), if, then this relay module N is a malfunctioning module, if not, and this relay module N non-fault then, get back to (3), carry out the detection of next electrical appliance module N+1.
The present invention also provides a kind of device that is used for above-mentioned matching network fault self-diagnosis method, sees also shown in Figure 4ly, and described matching network comprises that shunt capacitance module 1, series capacitance module 2, series inductance module 3 and antenna capacitance module 4 form; Described shunt capacitance module 1 be by a plurality of capacitor C 11, C12 ..., C1n composes in parallel, each electric capacity respectively by be series at separately relay K 11, K12 ..., K1n is connected with network; Described series capacitance module 2 be by a plurality of capacitor C 21, C22 ..., C2n is composed in series, described capacitor C 21, C22 ..., C2n two ends respectively relay K 21 in parallel, K22 ..., K2n; Described series inductance module 3 be by a plurality of inductance L 31, L32 ..., L3n is composed in series, described inductance L 31, L32 ..., L3n two ends respectively relay K 31 in parallel, K32 ..., K3n; Described antenna capacitance module 4 be by a plurality of capacitor C 41, C42 ..., C4n composes in parallel, each electric capacity respectively by relay K 41, K42 ..., K4n is connected with network.Regulate the impedance of antenna tuning network by the switch of transfer relay, described device comprises input signal source, measurement module, controller, display and interface circuit, described measurement module is located at the input end of described matching network, monitoring input signal flow through voltage amplitude amplitude V, the current amplitude value I of matching network and the phase differential Φ between them; Described controller connects described input signal source, measurement module, display and interface circuit, the debug signal of matching network certain frequency is given in described controller follow procedure control input signals source, the duty of pilot relay unit repeat circuit in regular turn, voltage amplitude amplitude V, current amplitude value I under certain switch different conditions of sending here according to measurement module and the phase differential Φ between them analyze comparison, judge whether this relay unit is trouble unit, with result's storage, and send display to show.
Described input signal source is made of Direct Digital Frequency Synthesizers DDS and power amplifier, described Direct Digital Frequency Synthesizers DDS connects described controller, described controller is controlled described Direct Digital Frequency Synthesizers DDS and is produced stable required frequency signal, and described power amplifier carries out power amplification with the stable frequency signal of Direct Digital Frequency Synthesizers DDS generation and send matching network.
Described controller is a microprocessor microcontroller.
Also be in series with wave filter on the relay circuit in the described relay unit, be used for the induction clutter that may occur in the filtering relay power.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the method that can utilize above-mentioned announcement and technology contents are made a little change or be modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (8)
1. matching network fault self-diagnosis method may further comprise the steps:
(1) the resonance frequency f0 of searching matching network;
(2) be that the signal of f0 send matching network with frequency;
(3) write down this state voltage amplitude amplitude V1, current amplitude value I1 and the phase differential Φ 1 between them for the moment;
(4) on off state of the relay among the change measured relay module N, voltage amplitude amplitude V2, current amplitude value I2 when writing down this state two and the phase differential Φ 2 between them;
(5) change the on off state of the relay among the measured relay module N once more, voltage amplitude amplitude V3, current amplitude value I3 when writing down this state three and the phase differential Φ 3 between them;
(6) V, I and the Φ under three kinds of states of comparison;
(6-1) if | V1-V3|＜| V1-V2| or | V1-V3|＜| V3-V2| then enter next step, otherwise this relay module N is a malfunctioning module;
(6-2) if | I1-I3|＜| I1-I2| or | I1-I3|＜| I3-I2| then enter next step, otherwise this relay module N is a malfunctioning module;
(6-3) if | Φ 1-Φ 3|＜| Φ 1-Φ 2| or | Φ 1-Φ 3|＜| Φ 3-Φ 2|, this relay module non-fault then, otherwise this relay module N is a malfunctioning module, gets back to (4), carries out the detection of next electrical appliance module N+1.
2. matching network fault self-diagnosis method according to claim 1 is characterized in that the resonance frequency f0 of the matching network of the described searching current state of step 1 may further comprise the steps:
(1-1) with the whole short circuits of the capacitor and inductor in the matching network;
(1-2) in the whole operating frequency range of matching network, sample, calculate, compare every 0.1MHz, seek the frequency of voltage standing wave ratio (VSWR) minimum;
(1-3) voltage standing wave ratio (VSWR) of described minimum frequency thinks then that below 1.1 this frequency is resonance frequency f0.
3. matching network fault self-diagnosis method according to claim 1 is characterized in that the resonance frequency f0 of the matching network of the described searching current state of step 1 may further comprise the steps:
(1-1) with the whole short circuits of the capacitor and inductor in the matching network;
(1-2) in the whole operating frequency range of matching network, sample, calculate, compare every 0.5MHz, seek the frequency f0 ' of voltage standing wave ratio (VSWR) minimum;
(1-3) again in the scope of f0 ' ± 0.4MHz, every the 0.1MHz sampling, calculate, relatively, seek the frequency of voltage standing wave ratio (VSWR) minimum;
(1-4) voltage standing wave ratio (VSWR) of described minimum frequency thinks then that below 1.1 this frequency is resonance frequency f0.
4. matching network fault self-diagnosis method may further comprise the steps:
(1) signal with the optional frequency f1 in the operating frequency range fmin～fmax of matching network send matching network;
(2) write down this state voltage amplitude amplitude Vf11, current amplitude value If11 and the phase differential Φ f11 between them for the moment;
(3) on off state of the relay among the change measured relay module N, voltage amplitude amplitude Vf12, current amplitude value If12 when writing down this state two and the phase differential Φ f12 between them;
(4) change the on off state of the relay among the measured relay module N once more, voltage amplitude amplitude Vf13, current amplitude value If13 when writing down this state three and the phase differential Φ f13 between them;
(5) V, I and the Φ under three kinds of states of comparison;
(5-1) if | Vf11-Vf13|＜| Vf11-Vf12| or
| Vf11-Vf13|＜| Vf13-Vf12| then enter next step, otherwise this relay module N may be malfunctioning module;
(5-2) if | If11-If13|＜| If11-If12| or
| If11-If13|＜| If13-If12| then enter next step, otherwise this relay module N may be malfunctioning module;
(5-3) if | Φ f11-Φ f13|＜| Φ f11-Φ f12| or
| Φ f11-Φ f13|＜| Φ f13-Φ f12|, this relay module non-fault then, otherwise this relay module N is a malfunctioning module.
(6) be that the signal of f2 send matching network with frequency, and f2 and f1 are with working frequency range center symmetry;
(7) write down this state voltage amplitude amplitude Vf21, current amplitude value If21 and the phase differential Φ f21 between them for the moment;
(8) on off state of the relay among the change measured relay module N, voltage amplitude amplitude Vf22, current amplitude value If22 when writing down this state two and the phase differential Φ f22 between them;
(9) change the on off state of the relay among the measured relay module N once more, voltage amplitude amplitude Vf23, current amplitude value If23 when writing down this state three and the phase differential Φ f23 between them;
(10) V, I and the Φ under three kinds of states of comparison, and the result in (5) judges jointly;
(10-1) V relatively, if | Vf21-Vf23|＜| Vf21-Vf22| or
| Vf21-Vf23|＜| Vf23-Vf22|, then enter next step, otherwise check whether this relay module N is malfunctioning module in (5-1), if then this relay module N is a malfunctioning module, if not, then enter next step;
(10-2) I relatively, if | If21-If23|＜| If21-If22| or
| If21-If23|＜| If23-If22|, then enter next step, otherwise check whether this relay module N is malfunctioning module in (5-2), if then this relay module N is a malfunctioning module, if not, then enter next step;
(10-3) Φ relatively, if | Φ f21-Φ f23|＜| Φ f21-Φ f22| or
| Φ f21-Φ f23|＜| Φ f23-Φ f22|, this relay module non-fault then, otherwise check whether this relay module N is malfunctioning module in (5-3), if, then this relay module N is a malfunctioning module, if not, and this relay module N non-fault then, get back to (3), carry out the detection of next electrical appliance module N+1.
5. device that is used for above-mentioned matching network fault self-diagnosis method, it is characterized in that comprising input signal source, measurement module, controller, display and interface circuit, described measurement module is located at the input end of described matching network, monitoring input signal flow through voltage amplitude amplitude V, the current amplitude value I of matching network and the phase differential Φ between them; Described controller connects described input signal source, measurement module, display and interface circuit, the debug signal of matching network certain frequency is given in described controller follow procedure control input signals source, the duty of pilot relay unit repeat circuit in regular turn, voltage amplitude amplitude V, current amplitude value I under certain switch different conditions of sending here according to measurement module and the phase differential Φ between them analyze comparison, judge whether this relay unit is trouble unit, with result's storage, and send display to show.
6. the device of matching network fault self-diagnosis method according to claim 5, it is characterized in that described input signal source is made of Direct Digital Frequency Synthesizers DDS and power amplifier, described Direct Digital Frequency Synthesizers DDS connects described controller, described controller is controlled described Direct Digital Frequency Synthesizers DDS and is produced stable required frequency signal, and described power amplifier carries out power amplification with the stable frequency signal of Direct Digital Frequency Synthesizers DDS generation and send matching network.
7. the device of matching network fault self-diagnosis method according to claim 5 is characterized in that described controller is a microprocessor microcontroller.
8. the device of matching network fault self-diagnosis method according to claim 5 is characterized in that also being in series with on the relay circuit in the described relay unit wave filter.
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