CN117406006A - Quick fault positioning method for radio frequency module of cold atom interferometer - Google Patents
Quick fault positioning method for radio frequency module of cold atom interferometer Download PDFInfo
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- CN117406006A CN117406006A CN202311694480.1A CN202311694480A CN117406006A CN 117406006 A CN117406006 A CN 117406006A CN 202311694480 A CN202311694480 A CN 202311694480A CN 117406006 A CN117406006 A CN 117406006A
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000003321 amplification Effects 0.000 claims description 8
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 8
- 239000000523 sample Substances 0.000 claims description 5
- 230000004807 localization Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/02—Digital function generators
- G06F1/022—Waveform generators, i.e. devices for generating periodical functions of time, e.g. direct digital synthesizers
Abstract
The invention discloses a rapid fault positioning method of a radio frequency module for a cold atom interferometer, which comprises the steps of firstly establishing an upper computer fault tree based on calibrated sensor data of each board card, rapidly positioning the board card with a fault point according to the upper computer fault tree, then constructing a board card S parameter fault tree, sequentially positioning a link with the fault point and positioning components with the fault point, thereby completing the fault positioning of the radio frequency module; according to the method, the fault of the radio frequency module of the cold atom interferometer can be rapidly positioned by constructing the upper computer fault tree and the board S parameter fault tree.
Description
Technical Field
The invention belongs to the technical field of radio frequency circuits, and particularly relates to a rapid fault positioning method for a radio frequency module of a cold atom interferometer.
Background
The cold atom interference experiment involves a complex laser modulation process, and a laser modulator such as an acousto-optic modulator, an electro-optic modulator and the like is generally used for modulating laser, and the laser modulator needs radio frequency signals with multiple frequencies to drive, so that a special radio frequency module is needed for providing radio frequency driving signals for the cold atom interferometer.
The radio frequency module of the cold atom interferometer consists of a plurality of signal source boards and power amplification boards, wherein the sensor is arranged on each board card according to the characteristics of the board card, the sensor is connected with an upper computer through a data line, one signal source board outputs a stable 100MHz reference signal and transmits the stable 100MHz reference signal to the next signal source board, the signal source board converts the reference signal into frequency through a DDS chip, a 110MHz DDS signal is output to the power amplification board, the 110MHz DDS signal is amplified by the power amplification board and is output to an acousto-optic modulator as a driving signal.
The link interconnection between boards, such as the output of one board as the input of another board, may be caused by the failure of one board in this case. The fault is thus not only in a single-layer point-to-point form, but also in a multi-layer fault tree form.
In the cold atom interference experiment, the radio frequency module is damaged and failed due to misoperation and other reasons, the internal circuit of the module is complex, so that the failure positioning is difficult, the reliability and maintainability of the radio frequency module are reduced, and the accuracy of the cold atom interference experiment result is affected.
Disclosure of Invention
Based on the above, the invention aims to provide a rapid fault positioning method for a radio frequency module of a cold atom interferometer, which utilizes a double fault tree to rapidly position fault points on the radio frequency module, solves the problem of difficult fault positioning of the radio frequency module of the cold atom interferometer, and improves maintainability of the radio frequency module.
In order to achieve the above purpose, the technical scheme adopted by the invention for solving the technical problems is as follows: a rapid fault positioning method for a radio frequency module of a cold atom interferometer comprises the following steps:
s1, constructing an upper computer fault tree: the upper computer reads each sensor data on the board card of the radio frequency module under the normal working condition as a calibration value, establishes an upper computer fault tree based on the calibrated sensor data of each board card, and positions a certain sensor as a fault point when the difference value between the real-time data of the sensor and the calibration value exceeds a judgment range, and the upper computer can rapidly position the board card where the fault point is located according to the upper computer fault tree by analyzing the influence of a single fault point on the whole radio frequency module when receiving the fault information;
s2, constructing a board S parameter fault tree: the two ports of the vector network analyzer are respectively connected with a coaxial cable, the other end of the coaxial cable is connected with a blocking capacitor, the other end of the blocking capacitor is connected with a probe, and the two probes are directly used for respectively connecting the input port and the output port of the board card for measurement, so that the S parameter calibration of the board card can be completed; under the condition that a link which is led out by the board card and consists of a plurality of components works normally, connecting an input port and an output port of the link by using a vector network analyzer, measuring S parameters of the link as a calibration value, respectively connecting the input port and the output port of each component in the link by using the vector network analyzer, measuring the S parameters of each component as the calibration value, establishing a board card S parameter fault tree based on the calibrated S parameters of each signal source board and the S parameters of the components, and after the board card where a fault is located by an upper computer, locating the link where the fault point is located by using the S parameters of the input and output of a certain link of the board card which are measured by using the vector network analyzer when the difference value between the S parameters and the calibration value exceeds a judging range; the component where the fault point is located can be positioned when the difference value between the S parameter and the calibration value of the input and output of a component of the link measured by using the vector network analyzer exceeds the judgment range; thereby completing the fault location of the radio frequency module.
Further, when the radio frequency module is composed of a first signal source board, a second signal source board and a power amplification board, two paths of power dividers are added on the first signal source board, one path of the two paths of power dividers normally outputs, the other path of the two paths of power dividers is connected with a frequency spectrograph or an oscilloscope for monitoring, and frequency and power information is uploaded to an upper computer.
Furthermore, the second signal source board comprises two links, and each link is composed of a DDS chip, a balun circuit, a radio frequency switch and a low-noise amplifier module.
Furthermore, a directional coupler and a detector are further added to the link output of the second signal source board, the directional coupler is responsible for distributing a small part of the output signal to the detector, the detector detects the power of the signal, and the power information of the link is transmitted to the upper computer in real time.
And the power amplification board is further added with a coupler and a detector to monitor output power like the second signal source board, namely the link output is also connected with a directional coupler and the detector, the directional coupler is responsible for distributing a small part of output signals to the detector, and the detector detects the power of the signals and transmits the power information of the link to the upper computer in real time.
The beneficial effects of the invention are as follows: according to the method, the board S parameter fault tree is added on the basis of the fault positioning of the sensor, so that the fault point can be rapidly positioned, the fault positioning speed of the cold atom interferometer radio frequency module is greatly improved, the fault positioning process is simplified, and the influence of the fault positioning on the module performance is reduced.
Drawings
FIG. 1 is a schematic diagram of a rapid fault localization method of the present invention;
FIG. 2 is a schematic diagram of an embodiment of the present invention;
fig. 3 is a schematic diagram of the vector network analyzer of the present invention.
The reference numerals are as follows: 10-upper computer, 20-upper computer fault tree, 30-radio frequency module, 40-component, 50-board card S parameter fault tree and 60-vector network analyzer.
Detailed Description
In order to facilitate an understanding of the present application, a more complete description of the present application will now be provided with reference to the relevant figures. Examples of the present application are given in the accompanying drawings. This application may, however, be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Referring to fig. 1, the method for rapidly positioning the faults of the radio frequency module 30 of the cold atom interferometer disclosed by the invention is realized by constructing an upper computer fault tree 20 and a board card S parameter fault tree 50, and the steps are as follows.
S1, constructing an upper computer fault tree 20.
The upper computer 10 reads the sensor data of each board card of the radio frequency module 30 under the normal working condition as a calibration value, and an upper computer fault tree 20 can be established based on the calibrated sensor data of each board card; the upper computer 10 determines that the sensor is a fault point when the difference value between the real-time data and the calibration value of the certain sensor exceeds the determination range, and when the upper computer 10 receives the fault information, the upper computer 10 can quickly position the board card where the fault point is located according to the upper computer fault tree 20 by analyzing the influence of the single fault point on the whole radio frequency module 30.
As shown in fig. 2, it is assumed that the low noise amplifier module 1 in the signal source board two link 1 burns out: the upper computer 10 detects that the output power of the power amplification board 1 is reduced by tens of dB, the frequency is unchanged, and the fault point is confirmed to be 1.1; the upper computer 10 detects that the power of the second signal source board is reduced by tens of dB, the frequency is unchanged, and the fault point is confirmed to be 2.1; the upper computer 10 detects that the frequency and the power of the first signal source board are unchanged, and confirms that the second signal source board is faulty.
S2, constructing a board S parameter fault tree 50.
Before the board card is installed into the radio frequency module 30, the vector network analyzer 60 is used for carrying out S parameter calibration, the calibration method is that two ports of the vector network analyzer 60 are respectively connected with a coaxial cable, the other end of the coaxial cable is connected with a blocking capacitor, the other end of the coaxial cable is connected with a probe, and during measurement, the two probes are directly used for respectively measuring the input port and the output port of the board card, so that the S parameter calibration of the board card can be completed, and a schematic diagram is shown in fig. 3.
Each board card comprises a plurality of links, each link comprises a plurality of components 40, the links which are respectively led out by the board cards (a first signal source board and a second signal source board of the embodiment) and are composed of the components 40 are connected with two ports which are input and output of the links by using a vector network analyzer 60 under the condition of normal operation, S parameters of the links are measured to be used as calibration values, then the vector network analyzer 60 is respectively connected with two ports which are input and output of each component 40 in the links, S parameters of each component 40 are measured to be used as calibration values, a board card S parameter fault tree 50 can be established based on the calibrated S parameters of the links of each signal source board and the S parameters of the components, and after the board card where a fault is located by using the vector network analyzer 60, the link where the fault point is located can be located when the S parameters which are input and output of a certain link of the board card measured by using the vector network analyzer 60 exceed a judgment range; further, when the difference between the S parameter and the calibration value of the input/output of a certain component 40 of the link measured by the vector network analyzer 60 exceeds the determination range, the component 40 where the fault point is located can be located.
Thereby completing the fault location of the rf module 30.
The traditional cold atom interferometer radio frequency module fault positioning method is characterized in that an upper computer and a sensor are only used for positioning on a board card or a link, the specific fault position of the link is required to be positioned in a mode of powering on the board card and sectionally flying the link, the work is complicated and complicated, and the flying line can change the impedance matching of the link to influence the link performance. The method adds the board S parameter fault tree 50 on the basis of the fault location of the sensor, can quickly locate fault points, greatly improves the fault location speed of the cold atom interferometer radio frequency module, simplifies the fault location process, and reduces the influence of the fault location on the module performance.
As shown in fig. 2, when the radio frequency module 30 is composed of a first signal source board, a second signal source board and a power amplifier board, two power dividers are added on the first signal source board, one of the two power dividers outputs normally, and the other is connected with a spectrometer or an oscilloscope for monitoring, and frequency and power information is uploaded to the upper computer 10; the second signal source board comprises two links, and each link consists of a DDS chip, a balun circuit, a radio frequency switch and a low-noise amplifier module; under the condition that the second signal source board can work normally, the vector network analyzer 60 is used for measuring the input and output of the two links, and the measured S parameter is used as a calibration value; measuring S parameters input and output by components in each link, wherein the measured S parameters are used as calibration values; the link output of the second signal source board is also connected/added with a directional coupler and a detector, wherein the directional coupler is responsible for distributing a small part of the output signal to the detector, and the detector detects the power of the signal and transmits the power information of the link to the upper computer 10 in real time; the power amplification board is added with a coupler and a detector to monitor output power like the second signal source board, namely, the link output is also connected with a directional coupler and the detector, the directional coupler is responsible for distributing a small part of output signals to the detector, the detector detects the power of signals, and the power information of the link is transmitted to the upper computer 10 in real time.
As shown in fig. 2, the vector network analyzer 60 is used to measure the S parameters of the input and output of the link 1 and the link 2, respectively, the S21 parameter of the link 1 is reduced, the S parameter of the link 2 is unchanged, and the failure of the link 1 is confirmed; the vector network analyzer 60 is used for respectively measuring the input and output S parameters of each component of the link 1, the S21 parameter of the low noise amplifier module is reduced, the S parameters of other components are unchanged, and the failure of the low noise amplifier module 1 of the signal source board two link 1 is confirmed.
In summary, the fault location method of the invention can rapidly locate the fault point, effectively improve the fault location speed of the cold atom interferometer radio frequency module, simplify the fault location process, and reduce the influence of the fault location on the module performance.
The foregoing is illustrative of the present invention and is not to be construed as limiting thereof, but rather, the present invention is to be construed as limited to the appended claims.
Claims (5)
1. A rapid fault positioning method for a radio frequency module of a cold atom interferometer is characterized by comprising the following steps of: comprises the following steps of
S1, constructing an upper computer fault tree (20): the upper computer (10) reads sensor data which normally works on a board card of the radio frequency module (30) as a calibration value, an upper computer fault tree (20) is established based on the sensor data, the upper computer (10) determines that the sensor is a fault point when the difference value between the real-time data of a certain sensor and the calibration value exceeds a determination range, and the upper computer (10) positions the board card where the fault point is located according to the upper computer fault tree (20);
s2, constructing a board S parameter fault tree (50): two ports of the vector network analyzer (60) are respectively connected with coaxial cables, and the coaxial cables are respectively connected with the input and output ports of the board card through connecting probes to finish S parameter calibration of the board card; when a link consisting of a plurality of components (40) led out by the board card respectively works normally, connecting an input end and an output end of the link by using a vector network analyzer (60), measuring S parameters of the link as a calibration value, respectively connecting the input end and the output end of each component (40) of the link by using the vector network analyzer (60), measuring S parameters of each component (40) as the calibration value, establishing a board card S parameter fault tree (50) based on the S parameters of the link and the S parameters of the components, and after the upper computer (10) locates the board card where the fault is located, locating the link where the fault point is located when the difference value between the S parameters of the input and the output of a certain link of the board card measured by the vector network analyzer (60) exceeds a judgment range; when the difference value between the S parameter and the calibration value of the input and output of a certain component (40) of the link measured by the vector network analyzer (60) exceeds the judgment range, the component (40) where the fault point is located is positioned;
thereby completing the fault localization of the radio frequency module (30).
2. The rapid fault location method for a radio frequency module of a cold atom interferometer according to claim 1, wherein when the radio frequency module (30) is composed of a first signal source board, a second signal source board and a power amplifier board, the first signal source board is connected with two power dividers, one of the two power dividers is connected with a spectrometer or an oscilloscope, and frequency and power information is uploaded to an upper computer (10).
3. The method for rapid fault localization of a radio frequency module for a cold atom interferometer according to claim 2, wherein the second signal source board comprises two links, each link is composed of a DDS chip, a balun circuit, a radio frequency switch and a low noise amplifier module.
4. The rapid fault location method for a radio frequency module of a cold atom interferometer according to claim 2, wherein the link output of the signal source board two is further connected with a directional coupler and a detector, the directional coupler distributes a part of the output signal to the detector, the detector detects the power of the signal, and the power information of the link is transmitted to the upper computer (10) in real time.
5. The rapid fault location method for a radio frequency module of a cold atom interferometer according to claim 2, 3 or 4, wherein the power amplification board is connected with a directional coupler and a detector, the directional coupler distributes a part of the output signal to the detector, the detector detects the power of the signal, and the power information of the link is transmitted to the upper computer (10) in real time.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311694480.1A CN117406006A (en) | 2023-12-12 | 2023-12-12 | Quick fault positioning method for radio frequency module of cold atom interferometer |
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| CN202311694480.1A CN117406006A (en) | 2023-12-12 | 2023-12-12 | Quick fault positioning method for radio frequency module of cold atom interferometer |
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| CN202311694480.1A Pending CN117406006A (en) | 2023-12-12 | 2023-12-12 | Quick fault positioning method for radio frequency module of cold atom interferometer |
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