CN103178909A - Method and device for detecting faults of standing wave measuring circuit - Google Patents
Method and device for detecting faults of standing wave measuring circuit Download PDFInfo
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- CN103178909A CN103178909A CN2011104419650A CN201110441965A CN103178909A CN 103178909 A CN103178909 A CN 103178909A CN 2011104419650 A CN2011104419650 A CN 2011104419650A CN 201110441965 A CN201110441965 A CN 201110441965A CN 103178909 A CN103178909 A CN 103178909A
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Abstract
The invention provides a method and a device for detecting faults of a standing wave measuring circuit. The method includes sending a single tone serving as a sending signal, wherein the single tone is located at a frequency point f0 outside a passing band range of an antenna feeder filter; counting feedback power and reflection power of the single tone; judging whether the difference between the feedback power and target power of the single tone is larger than a preset first threshold, if the difference is larger than the preset first threshold, judging that the faults exist in a current sending passageway or a feedback passageway, and ending the detection; otherwise, calculating a standing wave value of the circuit at the position of the frequency point f0 according to the feedback power and the reflection power; and judging whether the standing wave value is smaller than a preset second threshold, if the standing wave value is smaller than the preset second threshold, judging that the faults exist in the current standing wave measuring circuit, and otherwise, judging that the current standing wave measuring circuit is normal. By means of the method and the device, the faults of the standing wave measuring circuit can be effectively monitored.
Description
Technical field
The present invention relates to the fault detection technique in mobile communication system, particularly relate to fault detection method and the device of standing wave measurement circuit.
Background technology
In present mobile communication system, in order to detect the connection of feeder line, introduced the standing wave measurement circuit in radio frequency (RF) unit.Fig. 1 is the schematic diagram of present standing wave detection circuit, as shown in Figure 1, by the standing wave measurement circuit, standing wave is measured, and can judge the connection of feeder line.
In actual applications, may there be the faults such as the rosin joint of node and component failure in standing wave detection circuit, like this, will cause standing wave measurement to be lost efficacy.Therefore, for guaranteeing the accuracy of standing wave measurement, need to monitor the fault of standing wave detection circuit.
A kind of fault detection method of effective standing wave detection circuit is not yet proposed at present.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of fault detection method and device of standing wave detection circuit, can effectively monitor the fault of standing wave detection circuit.
In order to achieve the above object, the technical scheme of the present invention's proposition is:
A kind of fault detection method of standing wave measurement circuit, the method are applicable to exist arbitrary system of reflection electric circuit and filter, and the method comprises the following steps:
A, in the input port of sendaisle forward direction module, a single-tone is sent as transmitted signal, described single-tone is positioned on the outer frequency f0 of the free transmission range of antenna feeder filter, and the single-tone target power is P_target;
B, measure the feedback power of described single-tone at feedback and the feedback branch of reflection coupling module, in the reflection power of the described single-tone of reflection branch road measurement of feedback and reflection coupling module
C, judge described feedback power and described single-tone the difference of target power whether greater than the first default thresholding, if so, judge that there are fault in current sendaisle or feedback path, finish described detection; Otherwise execution in step d;
D, according to described feedback power and described reflection power, counting circuit is in the standing wave value at described frequency f0 place;
E, judge that described standing wave value whether less than the second default thresholding, if so, judges that there is fault in current standing wave measurement circuit, otherwise, judge that current standing wave measurement circuit is normal.
A kind of failure detector of standing wave measurement circuit, this device comprises:
Signal transmitting module is used in the input port of sendaisle forward direction module, a single-tone being sent as transmitted signal, and described single-tone is positioned on the free transmission range frequency f0 outward of antenna feeder filter, and the single-tone target power is P_target;
Measurement module is used for the feedback power at the described single-tone of feedback branch measurement of feedback and reflection coupling module, measures the reflection power of described single-tone at the reflection branch road of feedback and reflection coupling module;
The first judge module is used for judging that the difference of target power of described feedback power and described single-tone whether greater than the first thresholding of presetting, if so, judges that there are fault in current sendaisle or feedback path, finish described detection; Otherwise triggering the standing wave computing module carries out;
The standing wave computing module is used for according to described feedback power and described reflection power, and counting circuit is in the standing wave value at described frequency f0 place;
The second judge module is used for judging that described standing wave value whether less than the second default thresholding, if so, judges that there is fault in current standing wave measurement circuit, otherwise, judge that current standing wave measurement circuit is normal.
In sum, fault detection method and the device of the standing wave detection circuit that the present invention proposes utilize antenna feeder filter to the principle with the exterior point total reflection, can effectively monitor the fault of standing wave detection circuit.
Description of drawings
Fig. 1 is the schematic diagram of present standing wave detection circuit;
Fig. 2 is the method flow schematic diagram of the embodiment of the present invention one;
Fig. 3 is the apparatus structure schematic diagram of the embodiment of the present invention one.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.
Core concept of the present invention is: utilize antenna feeder filter to carrying out fault detect with the principle of exterior point total reflection.Based on this principle, if the standing wave measurement circuit does not have fault, when frequency transmission one is than large-signal outside passband so, feedback power can be detected and the target power error will be very little, reflection power can be suitable with transmitted power, corresponding standing wave value also will be very large, considers the gain error of general radio system, and the standing wave value is at least on 5.But if standing wave detection circuit has fault, reflection power can be very little so, and corresponding standing wave value also will be very little.Like this, send one than large-signal by frequency outside passband, according to the size of circuit in the standing wave value at this frequency place, can judge the standing wave measurement circuit and whether have fault.
The present invention is applicable to exist in arbitrary system of reflection electric circuit and filter.Fig. 2 is the method flow schematic diagram of the embodiment of the present invention one, and as shown in Figure 2, the method mainly comprises:
Here, in the input port of sendaisle forward direction module, a single-tone is sent as transmitted signal, the single-tone target power is P_target, and the those skilled in the art that specifically are set to of this target power grasp, and do not repeat them here.
Feedback power and the reflection power of step 202, the described single-tone of measurement.
Here, measure the feedback power of described single-tone at the feedback branch of feedback and reflection coupling module, measure the reflection power of described single-tone at the reflection branch road of feedback and reflection coupling module.Concrete method of measurement is grasped by those skilled in the art, does not repeat them here.
Step 203-204, judge described feedback power and described single-tone the difference of target power whether greater than the first default thresholding, if so, judge that there are fault in current sendaisle or feedback path, finish described detection; Otherwise execution in step 205.
Here need to prove, in actual applications, if sendaisle and feedback path are normal, the difference of feedback power and target power is less, otherwise, if the fault of existence, have than big difference, therefore, can by the size of both differences of judgement, determine whether sendaisle and feedback path be normal here.
Described the first thresholding need to be considered the gain error of sendaisle in real system and the gain error of feedback path when arranging.When this is worth arrange excessive, can cause the fault of failing to judge; Arrange too small the time normal path can be mistaken for and have fault.Those skilled in the art can according to actual needs, select suitable value by emulation.For example, when the forward direction gain error is ± 1db, the gain error of feedback path is ± during 0.5db, advise that this first thresholding can be set to 3db.
The computational methods of concrete standing wave value are grasped by those skilled in the art, do not repeat them here.
Step 206-208, judge that described standing wave value whether less than the second default thresholding, if so, judges that there is fault in current standing wave measurement circuit, otherwise, judge that current standing wave measurement circuit is normal.
In this step, based on aforementioned principle with the exterior point total reflection, determine according to the standing wave value whether current standing wave measurement circuit exists fault, namely when the standing wave value on frequency outside passband is very little, illustrate that standing wave detection circuit has fault.
Described the second thresholding need to consider to feed back the gain error of direction and the gain error of reflection direction when arranging.When this is worth arrange excessive, can cause failing to judge; Arrange too small the time can cause the standing wave measurement circuit is mistaken for normally and have fault.Those skilled in the art can select suitable value by emulation according to actual needs, and preferably, settings can be between 5-10.
Fig. 3 is the apparatus structure schematic diagram of the embodiment of the present invention one, and as shown in Figure 2, this device comprises:
Signal transmitting module is used in the input port of sendaisle forward direction module, a single-tone being sent as transmitted signal, and described single-tone is positioned on the free transmission range frequency f0 outward of antenna feeder filter, and the single-tone target power is P_target;
Measurement module is used for the feedback power at the described single-tone of feedback branch measurement of feedback and reflection coupling module, measures the reflection power of described single-tone at the reflection branch road of feedback and reflection coupling module;
The first judge module is used for judging that the difference of target power of described feedback power and described single-tone whether greater than the first thresholding of presetting, if so, judges that there are fault in current sendaisle or feedback path, finish described detection; Otherwise triggering the standing wave computing module carries out;
The standing wave computing module is used for according to described feedback power and described reflection power, and counting circuit is in the standing wave value at described frequency f0 place;
The second judge module is used for judging that described standing wave value whether less than the second default thresholding, if so, judges that there is fault in current standing wave measurement circuit, otherwise, judge that current standing wave measurement circuit is normal.
In sum, these are only preferred embodiment of the present invention, is not for limiting protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (4)
1. the fault detection method of a standing wave measurement circuit, the method is applicable to exist arbitrary system of reflection electric circuit and filter, it is characterized in that, and the method comprises the following steps:
A, in the input port of sendaisle forward direction module, a single-tone is sent as transmitted signal, described single-tone is positioned on the outer frequency f0 of the free transmission range of antenna feeder filter, and the single-tone target power is P_target;
B, measure the feedback power of described single-tone at feedback and the feedback branch of reflection coupling module, in the reflection power of the described single-tone of reflection branch road measurement of feedback and reflection coupling module;
C, judge described feedback power and described single-tone the difference of target power whether greater than the first default thresholding, if so, judge that there are fault in current sendaisle or feedback path, finish described detection; Otherwise execution in step d;
D, according to described feedback power and described reflection power, counting circuit is in the standing wave value at described frequency f0 place;
E, judge that described standing wave value whether less than the second default thresholding, if so, judges that there is fault in current standing wave measurement circuit, otherwise, judge that current standing wave measurement circuit is normal.
2. method according to claim 1, is characterized in that, described the second thresholding is more than or equal to 5 and less than or equal to 10.
3. the failure detector of a standing wave measurement circuit, is characterized in that, this device comprises:
Signal transmitting module is used in the input port of sendaisle forward direction module, a single-tone being sent as transmitted signal, and described single-tone is positioned on the free transmission range frequency f0 outward of antenna feeder filter, and the single-tone target power is P_target;
Measurement module is used for the feedback power at the described single-tone of feedback branch measurement of feedback and reflection coupling module, measures the reflection power of described single-tone at the reflection branch road of feedback and reflection coupling module;
The first judge module is used for judging that the difference of target power of described feedback power and described single-tone whether greater than the first thresholding of presetting, if so, judges that there are fault in current sendaisle or feedback path, finish described detection; Otherwise triggering the standing wave computing module carries out;
The standing wave computing module is used for according to described feedback power and described reflection power, and counting circuit is in the standing wave value at described frequency f0 place;
The second judge module is used for judging that described standing wave value whether less than the second default thresholding, if so, judges that there is fault in current standing wave measurement circuit, otherwise, judge that current standing wave measurement circuit is normal.
4. device according to claim 3, is characterized in that, described the second thresholding is more than or equal to 5 and less than or equal to 10.
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| CN201110441965.0A CN103178909B (en) | 2011-12-26 | 2011-12-26 | The fault detection method of standing wave measurement circuit and device |
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Cited By (4)
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| CN106771666A (en) * | 2016-12-21 | 2017-05-31 | 中国电子科技集团公司第二十研究所 | A kind of many standing wave point positioning systems of anti-interference high accuracy antenna-feedback system |
| CN108287271A (en) * | 2017-01-10 | 2018-07-17 | 中兴通讯股份有限公司 | A kind of external antenna detection method, equipment and device |
| CN109444835A (en) * | 2018-11-16 | 2019-03-08 | 北京遥感设备研究所 | A kind of receiving channel self checking method and system based on standing wave reflection |
| CN114543843A (en) * | 2022-03-14 | 2022-05-27 | 中国船舶重工集团公司第七0七研究所 | Resonant gyroscope channel error calibration and correction method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106454911A (en) * | 2016-09-14 | 2017-02-22 | 广东欧珀移动通信有限公司 | Faulty frequency band processing method and apparatus |
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