CN115951300A - Self-checking method of direction-finding system and direction-finding system - Google Patents
Self-checking method of direction-finding system and direction-finding system Download PDFInfo
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- CN115951300A CN115951300A CN202211613657.6A CN202211613657A CN115951300A CN 115951300 A CN115951300 A CN 115951300A CN 202211613657 A CN202211613657 A CN 202211613657A CN 115951300 A CN115951300 A CN 115951300A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
The invention discloses a self-checking method of a direction-finding system and the direction-finding system, the direction-finding system comprises: the direction-finding antenna array comprises an omnidirectional antenna oscillator and 9 directional oscillators, the omnidirectional antenna oscillator comprises a biconical oscillator and an annular oscillator, and the direction-finding receiver comprises a dual-channel radio frequency front end, a direction-finding signal processing module and a calibration source; the self-checking method comprises the following steps: the calibration source transmits a self-checking signal through the biconical oscillators, the 9 directional oscillators receive the self-checking signal and transmit the self-checking signal to the direction-finding receiver, and the direction-finding receiver determines whether a line has a fault or not by analyzing the frequency spectrum conditions of the 9 directional oscillators. The invention has self-checking function, can quickly locate the antenna fault and improve the working efficiency.
Description
Technical Field
The invention relates to the technical field of radio monitoring and direction finding, in particular to a self-checking method of a direction finding system and the direction finding system.
Background
In the existing direction-finding system, the phase interferometer direction-finding system has the advantages of short data processing time, high direction-finding precision, high sensitivity and the like, so that the phase interferometer direction-finding system is widely applied to a plurality of military and civil fields. In the nine-circular-array direction-finding antenna scheme, an omnidirectional antenna is adopted in the middle, 9 directional oscillators are adopted in the circumferential direction to form the nine-circular-array direction-finding antenna, the 360-degree incoming wave direction is covered, when a two-channel phase interferometer algorithm is applied, the omnidirectional antenna in the middle is output as a radio frequency channel RF1, only one path of the 9 directional oscillators in the circumferential direction at the same moment can be selected to be output as a radio frequency channel RF2, and therefore an antenna switch is needed to switch, the 360-degree incoming wave direction is covered, and the wave direction is calculated. However, the existing direction-finding system cannot quickly locate the antenna fault, resulting in low working efficiency.
Disclosure of Invention
In order to solve the above problems, the present invention provides a self-checking method for a direction-finding system and a direction-finding system, which has a self-checking function of an antenna switch array and can quickly locate an antenna fault, thereby improving the working efficiency.
In order to achieve the purpose, the invention adopts the technical scheme that:
a self-test method of a direction-finding system applied to a two-channel phase interferometer, the direction-finding system comprising: the direction-finding antenna array comprises an omnidirectional antenna oscillator and 9 directional oscillators, wherein the omnidirectional antenna oscillator comprises a biconical oscillator and an annular oscillator, and the direction-finding receiver comprises a dual-channel radio frequency front end, a direction-finding signal processing module and a calibration source;
the self-checking method comprises the following steps: the calibration source transmits a self-checking signal through the biconical oscillators, the 9 directional oscillators receive the self-checking signal and transmit the self-checking signal to the direction-finding receiver, and the direction-finding receiver determines whether a line has a fault or not by analyzing the frequency spectrum conditions of the 9 directional oscillators.
Further, the self-checking method further comprises the following steps:
and if the direction-finding receiver determines that the line has a fault, outputting a fault report.
Furthermore, the direction-finding system also comprises a display, and the direction-finding receiver is connected with the display.
Further, antenna switch array circuit module includes first antenna switch switching circuit and second antenna switch switching circuit, binary channels radio frequency front end includes RF1 receiving channel and RF2 receiving channel, the omnidirectional antenna oscillator passes through first antenna switch switching circuit and is connected with RF1 receiving channel, the directional oscillator passes through second antenna switch switching circuit and is connected with RF2 receiving channel.
A direction-finding system comprising: the direction-finding antenna array comprises an omnidirectional antenna oscillator and a plurality of directional oscillators, the antenna switch array circuit module comprises a first antenna switch switching circuit and a second antenna switch switching circuit, the direction-finding receiver comprises an RF1 receiving channel and an RF2 receiving channel, the omnidirectional antenna oscillator is connected with the RF1 receiving channel through the first antenna switch switching circuit, and the directional oscillators are connected with the RF2 receiving channel through the second antenna switch switching circuit.
Further, the direction finding receiver includes binary channels radio frequency front end, direction finding signal processing module and calibration source, the binary channels radio frequency front end include RF1 receiving channel and RF2 receiving channel, direction finding signal processing module with the binary channels radio frequency front end is connected, the calibration source with antenna switch array circuit module connects.
Furthermore, the direction-finding system also comprises a display, and the direction-finding receiver is connected with the display.
Further, the number of the directional oscillators is 9.
Further, the omnidirectional antenna element comprises a biconical element and a ring element.
The invention has the beneficial effects that:
the direction-finding system is applied to a dual-channel phase interferometer, and comprises: the direction-finding antenna array comprises an omnidirectional antenna oscillator and 9 directional oscillators, the omnidirectional antenna oscillator comprises a biconical oscillator and an annular oscillator, and the direction-finding receiver comprises a dual-channel radio frequency front end, a direction-finding signal processing module and a calibration source; the self-checking method comprises the following steps: the calibration source transmits a self-checking signal through the biconical oscillators, the 9 directional oscillators receive the self-checking signal and transmit the self-checking signal to the direction-finding receiver, and the direction-finding receiver determines whether a line has a fault or not by analyzing the frequency spectrum conditions of the 9 directional oscillators. The invention has the self-checking function, can quickly position the antenna fault and improve the working efficiency.
Drawings
FIG. 1 is a block diagram of a direction-finding system according to the present invention.
Fig. 2 is a schematic diagram of a direction-finding antenna array according to the present invention.
Fig. 3 is a circuit diagram of the antenna switch array circuit module according to the present invention.
Detailed Description
Referring to fig. 1-3, the present invention relates to a self-checking method of a direction-finding system and a direction-finding system.
A direction-finding system comprising: the direction-finding antenna array comprises an omnidirectional antenna oscillator and a plurality of directional oscillators, the antenna switch array circuit module comprises a first antenna switch switching circuit and a second antenna switch switching circuit, the direction-finding receiver comprises an RF1 receiving channel and an RF2 receiving channel, the omnidirectional antenna oscillator is connected with the RF1 receiving channel through the first antenna switch switching circuit, and the directional oscillators are connected with the RF2 receiving channel through the second antenna switch switching circuit.
In the above scheme, the direction-finding antenna array is configured to receive an air radio signal, and the antenna switch array circuit module is configured to sequentially switch each oscillator of the direction-finding antenna array to a receiving channel according to a certain algorithm, so that the direction-finding receiver can calculate an incoming wave direction according to intermediate frequency data acquired during a period in which each oscillator is turned on.
Further, direction finding receiver includes binary channels radio frequency front end, direction finding signal processing module and calibration source, the binary channels radio frequency front end include RF1 receiving channel and RF2 receiving channel, direction finding signal processing module with the binary channels radio frequency front end is connected, the calibration source with antenna switch array circuit module connects. Further, the direction-finding system also comprises a display, and the direction-finding receiver is connected with the display. Further, the number of the directional oscillators is 9. Furthermore, the omnidirectional antenna element comprises a biconical element and a ring-shaped element.
In this embodiment, the main functions of the direction-finding receiver are: 1) Receiving two paths of radio frequency signals RF1 and RF2 output by the antenna switch array circuit module, processing the two paths of radio frequency signals RF1 and RF2 through a direction-finding signal processing module and outputting IQ data, and performing direction-finding algorithm calculation of a correlation interferometer to obtain the incoming wave direction of space radio; 2) The phase difference of the two channels is calculated by adding the calibration source in real time, so that the phase error of the double-channel receiving channel at the direction finding moment is ensured to be calibrated in time. 3) The calibration source is used for sending signals, the biconical oscillator serves as a transmitting antenna at the moment, the peripheral 9 directional oscillators receive the signals, the accuracy of a line is judged by gradually observing the frequency spectrum conditions of the 9 oscillators, and meanwhile, a fault report is output.
In the present embodiment of the present invention,
(1) The 9 directional oscillators sequentially control the switching of the radio frequency switches 1-13 according to a certain algorithm, so that the oscillators 1-9 antenna oscillators are switched to a second antenna switch switching circuit to output RF2; the biconical oscillator and the annular oscillator sequentially control the radio frequency switches 15-19 to be switched to the first antenna switch switching circuit according to a certain algorithm, and RF1 is output; then, accessing the RF1 and the RF2 into a direction-finding receiver to calculate the direction of an incoming wave signal;
(2) Designing oscillators 1 to 9, wherein the number of radio frequency switches passed by each oscillator is consistent, namely, the radio frequency signal fed by each antenna oscillator is ensured to be consistent in intensity and switching speed, and the insertion loss of each channel is consistent;
(3) Designing the isolation degree: in order to ensure the isolation between the radio-frequency signals fed down by each antenna element and each radio-frequency channel, an alternative radio-frequency switch is selected in the design;
(4) Designing phase consistency: switches 17 to 19 by switching the switch 14; switch 5, switch 8, switches 10-13; the correction source signal is enabled to respectively output RF1 and RF2 through the power divider and the switch circuit, and the direction-finding receiver is accessed to perform phase difference calculation and is used for compensating the phases of the two channels, so that the phases of the two channels of RF1 and RF2 are ensured to be consistent.
(5) Self-checking function design: 1) At the moment, the biconical oscillator is used as a transmitting antenna, 9 directional oscillators on the periphery receive the signals, and the correctness of the circuit is judged by gradually observing the frequency spectrum conditions of the 9 oscillators through the direction-finding receiver through the change-over switches 14-16 and the switches 1-13; 2) After the 9 directional oscillators are tested to pass through the second antenna switch switching circuit, the phase difference of each channel is calculated and used for compensating the phases of the 9 channels, and the phase consistency of the 9 channels is guaranteed.
The antenna self-checking function: the correction source outputs signals to the biconical oscillator, the signals are transmitted, and the channels of the 9 directional oscillators are tested to judge whether the antenna array and the switch are normally connected, so that the manual detection work is omitted. The circuit designs two self-checking functions, one is that a signal is transmitted through a correction source, 9 directional oscillators receive the signal, namely, channels from an antenna end to a receiver full radio frequency link are all detected; the other is that the calibration source directly passes through the antenna switch array circuit module to check the radio frequency channels except the antenna.
A self-test method of a direction-finding system applied to a two-channel phase interferometer, the direction-finding system comprising: the direction-finding antenna array comprises an omnidirectional antenna oscillator and 9 directional oscillators, wherein the omnidirectional antenna oscillator comprises a biconical oscillator and an annular oscillator, and the direction-finding receiver comprises a dual-channel radio frequency front end, a direction-finding signal processing module and a calibration source;
the self-checking method comprises the following steps: the calibration source transmits a self-checking signal through the biconical oscillators, the 9 directional oscillators receive the self-checking signal and transmit the self-checking signal to the direction-finding receiver, and the direction-finding receiver determines whether a line has a fault or not by analyzing the frequency spectrum conditions of the 9 directional oscillators.
Further, the self-checking method further comprises:
and if the direction-finding receiver determines that the line has a fault, outputting a fault report.
Furthermore, the direction-finding system also comprises a display, and the direction-finding receiver is connected with the display.
Further, antenna switch array circuit module includes first antenna switch switching circuit and second antenna switch switching circuit, binary channels radio frequency front end includes RF1 receiving channel and RF2 receiving channel, the omnidirectional antenna oscillator is connected with RF1 receiving channel through first antenna switch switching circuit, the directional oscillator is connected with RF2 receiving channel through second antenna switch switching circuit.
It should be noted that the working principle of the self-checking method of the direction-finding system is the same as that of the direction-finding system.
The invention has the following advantages:
1) The isolation degree design of each radio frequency channel is carried out, the isolation degree is more than or equal to 50dB, the gain compensation is carried out on the radio frequency signal frequency band with larger attenuation, and the direction finding quality and the sensitivity are improved;
2) The radio frequency paths passed by each antenna element are designed to be consistent, and meanwhile, each radio frequency channel correction channel is designed, so that the phase consistency and stability of the antenna switch channel are guaranteed.
3) The self-checking channel of each antenna oscillator is designed, the faults of the positioning antenna array are detected more intelligently, the assembly quality is improved, and the working efficiency is improved.
4) The antenna self-checking function: the correction source outputs signals to the biconical oscillator, the signals are transmitted, and 9 channels of the directional oscillator are tested to judge whether the antenna array and the switch are normally connected, so that the manual detection work is omitted. The circuit designs two self-checking functions, one is that a signal is transmitted through a correction source, 9 directional oscillators receive the signal, namely, channels from an antenna end to a receiver full radio frequency link are all detected; the other is that the calibration source directly passes through the antenna switch array circuit module to check the radio frequency channels except the antenna.
The invention fully considers the radio frequency performance index of the antenna switch array, carries out gain compensation on a radio frequency band with larger attenuation, simultaneously designs a calibration path which meets the passing path of each radio frequency signal in order to ensure the consistency of two radio frequency channel phases; in addition, the antenna switch array has a self-checking function, so that the antenna fault can be quickly positioned, and the working efficiency is improved.
The above embodiments are merely illustrative of the preferred embodiments of the present invention, and not restrictive, and various changes and modifications to the technical solutions of the present invention may be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are intended to fall within the scope of the present invention defined by the appended claims.
Claims (9)
1. A self-checking method of a direction-finding system, wherein the direction-finding system is applied to a two-channel phase interferometer, and the direction-finding system comprises: the direction-finding antenna array comprises an omnidirectional antenna oscillator and 9 directional oscillators, wherein the omnidirectional antenna oscillator comprises a biconical oscillator and an annular oscillator, and the direction-finding receiver comprises a dual-channel radio frequency front end, a direction-finding signal processing module and a calibration source;
the self-checking method comprises the following steps: the calibration source transmits a self-checking signal through the biconical oscillators, the 9 directional oscillators receive the self-checking signal and transmit the self-checking signal to the direction-finding receiver, and the direction-finding receiver determines whether a line has a fault or not by analyzing the frequency spectrum conditions of the 9 directional oscillators.
2. The self-test method of the direction-finding system of claim 1, further comprising:
and if the direction-finding receiver determines that the line has a fault, outputting a fault report.
3. The self-test method of the direction-finding system according to claim 1, characterized in that: the direction-finding system also comprises a display, and the direction-finding receiver is connected with the display.
4. The self-test method of the direction-finding system according to claim 1, characterized in that: antenna switch array circuit module includes first antenna switch switching circuit and second antenna switch switching circuit, binary channels radio frequency front end includes RF1 receiving channel and RF2 receiving channel, the omnidirectional antenna oscillator is connected with RF1 receiving channel through first antenna switch switching circuit, the directional oscillator passes through second antenna switch switching circuit and is connected with RF2 receiving channel.
5. A direction-finding system for use with a two-channel phase interferometer, the direction-finding system comprising: the direction-finding antenna array comprises an omnidirectional antenna oscillator and a plurality of directional oscillators, the antenna switch array circuit module comprises a first antenna switch switching circuit and a second antenna switch switching circuit, the direction-finding receiver comprises an RF1 receiving channel and an RF2 receiving channel, the omnidirectional antenna oscillator is connected with the RF1 receiving channel through the first antenna switch switching circuit, and the directional oscillators are connected with the RF2 receiving channel through the second antenna switch switching circuit.
6. The direction-finding system of claim 5, wherein: the direction-finding receiver comprises a double-channel radio frequency front end, a direction-finding signal processing module and a calibration source, wherein the double-channel radio frequency front end comprises an RF1 receiving channel and an RF2 receiving channel, the direction-finding signal processing module is connected with the double-channel radio frequency front end, and the calibration source is connected with the antenna switch array circuit module.
7. The direction-finding system of claim 5, wherein: the direction-finding system also comprises a display, and the direction-finding receiver is connected with the display.
8. The direction-finding system of claim 5, wherein: the number of the directional oscillators is 9.
9. The direction-finding system of claim 5, wherein: the omnidirectional antenna element comprises a biconical element and an annular element.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211613657.6A CN115951300A (en) | 2022-12-15 | 2022-12-15 | Self-checking method of direction-finding system and direction-finding system |
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| CN202211613657.6A CN115951300A (en) | 2022-12-15 | 2022-12-15 | Self-checking method of direction-finding system and direction-finding system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117031392A (en) * | 2023-10-08 | 2023-11-10 | 北京海格神舟通信科技有限公司 | Method and system for direction finding of dual-channel receiver |
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- 2022-12-15 CN CN202211613657.6A patent/CN115951300A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117031392A (en) * | 2023-10-08 | 2023-11-10 | 北京海格神舟通信科技有限公司 | Method and system for direction finding of dual-channel receiver |
| CN117031392B (en) * | 2023-10-08 | 2023-12-29 | 北京海格神舟通信科技有限公司 | Method and system for direction finding of dual-channel receiver |
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