CN107490757B - Microwave amplifier irradiation effect on-line test method and system - Google Patents
Microwave amplifier irradiation effect on-line test method and system Download PDFInfo
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- CN107490757B CN107490757B CN201710762192.3A CN201710762192A CN107490757B CN 107490757 B CN107490757 B CN 107490757B CN 201710762192 A CN201710762192 A CN 201710762192A CN 107490757 B CN107490757 B CN 107490757B
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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
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
- G01R31/2822—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere of microwave or radiofrequency circuits
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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
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2832—Specific tests of electronic circuits not provided for elsewhere
- G01R31/2836—Fault-finding or characterising
- G01R31/2849—Environmental or reliability testing, e.g. burn-in or validation tests
Abstract
A microwave amplifier irradiation effect on-line test method and system, firstly, index test is carried out on the microwave amplifier to be tested, when the test is qualified, before the irradiation of the microwave amplifier, in the irradiation process and after the irradiation is finished, a main control case controls a front probe to supply power to the microwave amplifier to be tested and provide an excitation signal source, and the output signal power of the microwave amplifier to be tested is measured by the front probe and then output. The invention can measure the technical indexes of the microwave amplifier such as frequency range, small signal gain, saturation power, efficiency and the like by arranging the front probe, meets the use requirement of the microwave amplifier and has good practical value.
Description
Technical Field
The invention relates to an online testing method and system for the irradiation effect of a microwave amplifier.
Background
The technical index of the microwave amplifier can change under irradiation, namely, the irradiation effect is generated. The measurement of the change rule and the change quantity of the technical indexes of the microwave amplifier under the irradiation condition can provide data for the irradiation reliability design of the system, and is the key for improving the irradiation resistance of the system.
Because the irradiation can harm the human body, and the microwave signal radiation is strong, the accuracy of the test result can be seriously influenced by long-distance transmission. Therefore, the irradiation effect of the microwave amplifier is conventionally tested by using a shift test, and a schematic diagram thereof is shown in fig. 1.
And before irradiation, the technical indexes of the microwave amplifier are tested in a test room. The microwave amplifier then receives the radiation solely between the irradiations. And when the irradiation is finished and the device is determined to be harmless to the human body, taking out the device. And testing the technical indexes of the device again in detail in the test room, and comparing the technical indexes with the data before irradiation to obtain the change rule and the change quantity of the technical indexes. This method can obtain the technical index change condition of the irradiated device, but has several disadvantages.
(1) The device is in a non-powered state when receiving irradiation, and the state is different from an actual working state;
(2) after irradiation, the device can be taken out after the device is harmless to a human body, the interval time is possibly longer, and the index of the device is possibly changed in the process;
(3) the test states of the microwave amplifier connected twice before and after irradiation may be inconsistent, which easily causes inaccurate test results;
(4) the index change process of the device cannot be monitored.
Disclosure of Invention
The technical problem solved by the invention is as follows: the method and the system overcome the defects of the prior art, solve various defects caused by shift test, provide a method for acquiring the irradiation effect data of the microwave amplifier more accurately and comprehensively, and have good practical effect.
The technical solution of the invention is as follows: an on-line test method for the irradiation effect of a microwave amplifier comprises the following steps:
(1) performing index test on the microwave amplifier to be tested, and when the test is qualified, turning to the step (2), otherwise, ending the current test process;
(2) before, during and after the irradiation of the microwave amplifier, the front probe is controlled by the main control case to supply power to the microwave amplifier to be measured and provide an excitation signal source, and the output signal power of the microwave amplifier to be measured is measured by the front probe and then output.
An irradiation effect on-line test system of a microwave amplifier comprises an irradiation test subsystem and a control subsystem, wherein the irradiation test subsystem comprises a shielding module, a front probe and a first interaction module, and the control subsystem comprises a main control cabinet and a second interaction module;
the main control case controls the front probe to supply power to the microwave amplifier to be tested, controls the front probe to provide an excitation signal source for the microwave amplifier to be tested, adjusts the power frequency of the excitation signal source and controls the front probe to measure the output signal power of the microwave amplifier to be tested through the second interaction module according to an external instruction after the index of the microwave amplifier to be tested is tested to be qualified, before, during and after the irradiation of the microwave amplifier is finished;
the shielding module shields the front probe in the irradiation process, so that the front probe is not influenced by the irradiation effect;
the prepositive probe supplies power to the microwave amplifier to be measured through the first interaction module, provides an excitation signal source with variable power frequency, and measures the output signal power of the microwave amplifier to be measured.
The test indexes of the microwave amplifier comprise a microwave amplifier frequency range, small signal gain, saturated output power and a 1dB compression point.
The front probe comprises a direct current power supply, a microwave signal source and a microwave power meter, the direct current power supply supplies power to the microwave amplifier to be tested under the control of the main control case, the microwave signal source provides an excitation signal source for the microwave amplifier to be tested under the control of the main control case, the power and the frequency of the excitation signal source are adjusted according to an external instruction, and the microwave power meter measures the output signal power of the microwave amplifier to be tested under the control of the main control case.
The power supply and excitation signals of the front probe and the main control case and the output signal power measurement signal of the microwave amplifier to be measured are transmitted by adopting a differential or shielded wire.
The front probe is connected with the main control case through a CAN bus or a 422 bus.
The preposed probe and the microwave amplifier to be detected are arranged in an irradiation field, the preposed probe performs irradiation protection, and the frequency range, the frequency precision, the power range, the power precision, the voltage and the power of an excitation signal source output by the preposed probe meet the requirements of the microwave amplifier to be detected.
Compared with the prior art, the invention has the advantages that:
(1) the invention adopts the mode of a front probe, realizes the index measurement of the microwave amplifier in a long-line transmission state and creates conditions for realizing the online monitoring of the irradiation effect;
(2) the invention transmits low-frequency signals such as power supply, control and the like by using a differential or shielded wire, thereby reducing the influence of radiation field noise on the transmitted signals;
(3) the invention can simulate the actual working state of the microwave amplifier during irradiation by arranging the front probe, thereby improving the practicability of irradiation effect data;
(4) by arranging the front probe, the invention can measure the technical indexes of the microwave amplifier such as frequency range, small signal gain, saturation power, efficiency and the like, thereby meeting the use requirement of the microwave amplifier;
(5) the invention keeps the test state consistent before, during and after irradiation, and can avoid test result errors caused by test state changes.
Drawings
FIG. 1 is a block diagram of a shift test method for irradiation effect of a conventional microwave amplifier;
FIG. 2 is a block diagram of an online testing method for the irradiation effect of a microwave amplifier;
fig. 3 is a flow chart of the microwave amplifier irradiation effect on-line testing method.
Detailed Description
The microwave amplifier on-line testing method and the system thereof provided by the invention have the principle block diagram as shown in figure 2, an upper computer controls a front probe through a main control case, supplies power supply and excitation signal sources to a microwave amplifier to be tested, measures the output signal power of the microwave amplifier and transmits the output signal power back to a main control computer, and the remote on-line measurement of the parameters of the microwave amplifier is realized.
The preposed probe comprises a direct current power supply, a microwave signal source and a microwave power meter, and the output voltage of the direct current power supply, the output signal frequency of the microwave signal source and the power measurement operation of the microwave power meter can be controlled by a control line.
The preposed probe outputs a microwave signal, the frequency range covers the whole working frequency range of the microwave amplifier, and the frequency precision meets the requirement of the microwave amplifier on frequency measurement precision; the output power range of the preposed probe comprises the whole working power range of the microwave amplifier, and the output power precision meets the requirement of the microwave amplifier on power measurement precision; the power supply output voltage and power of the front probe meet the voltage and power requirements of the microwave amplifier, and the voltage and current measurement precision meets the voltage and current measurement precision requirements of the microwave amplifier; the measuring power range of the front probe comprises the output power range of the microwave amplifier, and the power measuring precision meets the power measuring precision requirement of the microwave amplifier.
The microwave signal output by the front probe is a single-point frequency signal, the frequency is adjustable, the adjustable range covers the frequency range of the microwave amplifier, the power can be set to be high power or low power according to the requirement of test parameters, and the maximum power meets the requirement of the maximum input power of the microwave amplifier.
The microwave signal output by the tested microwave amplifier in the method is a single-point frequency signal, the frequency is equal to the frequency of the output signal of the front probe, and the power is the amplified power of the output signal of the front probe.
The long line between the front probe and the main control case is only used for transmitting power supply and control signals, is both low-frequency signals and is suitable for long-line transmission; the long line between the front probe and the main control case is transmitted by adopting a differential or shielded line, so that the influence of environmental noise on a transmission result is reduced, and the communication rate of the control signal meets the requirement of measurement time.
The main control case comprises a voltage conversion and control coding and decoding functional module and provides a power supply and a control instruction for the front probe according to the instruction of the upper computer; the power supply signal is a working voltage signal required by the front probe; the control command is a communication signal, and a communication mode with strong long-distance anti-interference capability is adopted, for example: CAN bus, 422 protocol, etc., the transmission content includes: controlling the frequency and power of the output signal of the preposed probe, measuring the power of the output signal of the microwave amplifier to be measured and the like.
When the method is used for irradiation measurement, the actual working state of the microwave amplifier can be simulated, and power supply and excitation signals are provided for the device, for example, the power-up sequence of positive electricity and negative electricity is controlled, the power-up sequence of the power supply and microwave excitation signals is controlled, the working duty ratio is controlled, and the like;
compared with the prior art, the method can keep the test system unchanged before irradiation, after irradiation neutralization and irradiation, and ensure the consistency of the test state; meanwhile, the change of technical indexes of the device can be continuously monitored in the irradiation process, and the change rule is obtained.
When the method is used for testing the irradiation effect, the main control computer and the main control cabinet are arranged in the testing room, so that the safety of personnel is ensured. The preposed probe is arranged in the irradiation field adjacent to the microwave amplifier to be detected, so that irradiation protection is required, and the microwave amplifier to be detected is arranged in the irradiation field. The prepositive probe is connected with the microwave amplifier to be tested through a short cable, so that the accuracy of test data is ensured. The main control case is connected with the front probe through a long line to provide power supply and control signals for the front probe.
The test flow of the method of the invention is shown in FIG. 3. The index test of the microwave amplifier to be tested is firstly carried out under the state of short lines (control lines and power lines), after the test is qualified, test equipment is arranged in a test field, and a long line is used for connecting a host and a front probe. And after connection, testing before irradiation, during irradiation and after irradiation is carried out, and acquiring irradiation effect data of the device.
The method keeps the connection mode unchanged before and during irradiation and during measurement after irradiation, thereby avoiding measurement result errors caused by the change of the connection mode.
The testable indexes of the method comprise: the frequency range, the small signal gain, the saturated output power, the 1dB compression point and the like of the amplifier can meet the test requirement on the irradiation effect of the microwave amplifier, and the change rule of the indexes such as the small signal gain, the saturated output power, the 1dB compression point and the like along with the irradiation time, the irradiation intensity and the like in the specified frequency range is obtained.
Example (b): an online test case of a microwave amplifier is shown in fig. 2. The upper computer controls the front probe through the main control case, provides power supply and excitation signal sources for the microwave amplifier to be tested, measures the output signal power of the microwave amplifier and transmits the output signal power back to the main control computer. The remote on-line measurement of the microwave amplifier parameters is realized.
Nominal value of the microwave amplifier to be measured: the power supply is +5V single power supply, the frequency is 10-12GHz, the maximum allowable input power is +10dBm, and the gain is 10 dB. The preposed probe comprises a direct current power supply, a microwave signal source, a microwave power meter and other functional modules, and the output voltage, the output signal frequency and the power of the preposed probe can be controlled by a control line. The frequency range of the output microwave signal of the preposed probe is 10-12GHz, the whole working frequency range of the microwave amplifier is 10-12GHz, the frequency precision is 0.1MHz, and the requirement of the microwave amplifier on the frequency measurement precision is met; the output power range of the preposed probe is-30 to +10dBm, the output power range of the preposed probe comprises the whole working power range of the microwave amplifier is-30 to 0dBm, the output power precision is 0.1dB, and the requirement of the microwave amplifier on the power measurement precision is met; the power supply output voltage 5V and power 5W of the preposed probe meet the voltage 5V and power 0.5W requirements of the microwave amplifier, and the voltage and current measurement precision of 0.1V/0.1A meets the voltage and current measurement precision requirements of the microwave amplifier; the measuring power range of the front probe is-20 dBm, the output power range of the microwave amplifier is-20 dBm, and the power measuring precision of 0.1dB meets the power measuring precision requirement of the microwave amplifier.
The front probes in the method are all in modular design, so that the size of the device is reduced, and the radiation field is favorably placed; the input and output microwave signals of the front probe are transmitted to a microwave amplifier to be tested by a short line, so that the influence of cable transmission on a test result is reduced; the microwave signal output by the front probe is a single-point frequency signal, the frequency is adjustable, the adjustable range covers 10-12GHz, the power is-30- +10dBm, the microwave signal can be set to be high power or low power according to the requirement of test parameters, and the maximum power meets the requirement of the maximum input power of the microwave amplifier.
The microwave signal output by the microwave amplifier to be tested is a single-point frequency signal, the frequency of the single-point frequency signal is equal to the frequency of 10-12GHz of the output signal of the front probe, and the power of the single-point frequency signal is-20 dBm of the amplified output signal of the front probe.
The long line between the front probe and the main control case is only used for transmitting power supply and control signals, is both low-frequency signals and is suitable for long-line transmission; the long line between the front probe and the main control case is transmitted by adopting a differential or shielded line, so that the influence of environmental noise on a transmission result is reduced; the control signal communication rate 9600kbps meets the measurement time requirement; the main control case comprises functional modules of voltage conversion, control coding and decoding and the like, and provides a power supply and a control instruction for the front probe according to the instruction of the upper computer; the power supply signal is a working voltage signal 5V required by the front probe; control command adopts the communication mode that long distance interference killing feature is strong for communication signal, chooses CAN bus protocol for use, and the transmission content includes: controlling the frequency and power of the output signal of the preposed probe, measuring the power of the output signal of the microwave amplifier to be measured and the like.
During irradiation measurement, the actual working state of the microwave amplifier can be simulated, and a 5V power supply voltage and an excitation signal with-10 dBm and 10% duty ratio are provided for the device; before irradiation, during irradiation and after irradiation, the test system can be kept unchanged, and the consistency of the test state is ensured; the change of technical indexes such as gain, output power, supply current and the like of the device can be continuously monitored in the irradiation process, and the change rule is obtained.
In the irradiation effect test, the main control computer and the main control cabinet are arranged in the test room, so that the personnel safety is ensured. The front probe is arranged in an irradiation field, is adjacent to the microwave amplifier to be tested and carries out irradiation protection, and the microwave amplifier to be tested is arranged in the irradiation field. The prepositive probe is connected with the microwave amplifier to be tested through a short cable, so that the accuracy of test data is ensured. The main control case is connected with the front probe through a long line to provide power supply and control signals for the front probe.
The test flow of the method of the invention is shown in FIG. 3. The index test of the microwave amplifier to be tested is firstly carried out under the state of short lines (control lines and power lines), after the test is qualified, test equipment is arranged in a test field, and a long line is used for connecting a host and a front probe. And after connection, testing before irradiation, during irradiation and after irradiation is carried out, and acquiring irradiation effect data of the device.
The testable indexes of the method comprise: the frequency range, small signal gain, saturated output power, 1dB compression point and the like of the amplifier can meet the test requirement on the irradiation effect of the microwave amplifier.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.
Claims (2)
1. An on-line test method for the irradiation effect of a microwave amplifier is characterized by comprising the following steps:
(1) performing index test on the microwave amplifier to be tested, and when the test is qualified, turning to the step (2), otherwise, ending the current test process; the index test comprises a microwave amplifier frequency range, small signal gain, saturated output power and a 1dB compression point;
(2) before, during and after the irradiation of the microwave amplifier, the front probe is controlled by the main control case to supply power to the microwave amplifier to be measured and provide an excitation signal source, and the output signal power of the microwave amplifier to be measured is measured by the front probe and then output;
the front probe comprises a direct current power supply, a microwave signal source and a microwave power meter, wherein the direct current power supply supplies power to the microwave amplifier to be tested under the control of the main control case, the microwave signal source provides an excitation signal source for the microwave amplifier to be tested under the control of the main control case, the power and the frequency of the excitation signal source are adjusted according to an external instruction, and the microwave power meter measures the output signal power of the microwave amplifier to be tested under the control of the main control case; the power supply and excitation signals of the front probe and the main control case and the output signal power measurement signal of the microwave amplifier to be tested are transmitted by adopting a differential or shielded wire; the front probe is connected with the main control case through a CAN bus or a 422 bus; the preposed probe and the microwave amplifier to be detected are arranged in an irradiation field, the preposed probe performs irradiation protection, and the frequency range, the frequency precision, the power range, the power precision, the voltage and the power of an excitation signal source output by the preposed probe meet the requirements of the microwave amplifier to be detected.
2. An irradiation effect on-line test system of a microwave amplifier is characterized by comprising an irradiation test subsystem and a control subsystem, wherein the irradiation test subsystem comprises a shielding module, a front probe and a first interaction module, and the control subsystem comprises a main control cabinet and a second interaction module;
the main control case controls the front probe to supply power to the microwave amplifier to be tested, controls the front probe to provide an excitation signal source for the microwave amplifier to be tested, adjusts the power frequency of the excitation signal source and controls the front probe to measure the output signal power of the microwave amplifier to be tested through the second interaction module according to an external instruction after the index of the microwave amplifier to be tested is tested to be qualified, before, during and after the irradiation of the microwave amplifier is finished; the index test comprises a microwave amplifier frequency range, small signal gain, saturated output power and a 1dB compression point;
the shielding module shields the front probe in the irradiation process, so that the front probe is not influenced by the irradiation effect;
the front probe supplies power to the microwave amplifier to be measured through the first interaction module, provides an excitation signal source with variable power frequency, and measures the output signal power of the microwave amplifier to be measured;
the front probe comprises a direct current power supply, a microwave signal source and a microwave power meter, wherein the direct current power supply supplies power to the microwave amplifier to be tested under the control of the main control case, the microwave signal source provides an excitation signal source for the microwave amplifier to be tested under the control of the main control case, the power and the frequency of the excitation signal source are adjusted according to an external instruction, and the microwave power meter measures the output signal power of the microwave amplifier to be tested under the control of the main control case; the power supply and excitation signals of the front probe and the main control case and the output signal power measurement signal of the microwave amplifier to be tested are transmitted by adopting a differential or shielded wire; the front probe is connected with the main control case through a CAN bus or a 422 bus; the preposed probe and the microwave amplifier to be detected are arranged in an irradiation field, the preposed probe performs irradiation protection, and the frequency range, the frequency precision, the power range, the power precision, the voltage and the power of an excitation signal source output by the preposed probe meet the requirements of the microwave amplifier to be detected.
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| CN110596487A (en) * | 2019-09-03 | 2019-12-20 | 中国运载火箭技术研究院 | Microwave module neutron irradiation effect testing arrangement |
| CN111398778A (en) * | 2020-03-16 | 2020-07-10 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Online monitoring device and monitoring method for irradiation of sensitive structure of MEMS device |
| CN113169762B (en) * | 2021-04-19 | 2023-03-31 | 华为技术有限公司 | Communication device and method |
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