CN112684322B - Test platform of power module - Google Patents
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- CN112684322B CN112684322B CN202011533138.XA CN202011533138A CN112684322B CN 112684322 B CN112684322 B CN 112684322B CN 202011533138 A CN202011533138 A CN 202011533138A CN 112684322 B CN112684322 B CN 112684322B
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Abstract
The invention discloses a test platform of a power module, which comprises a test motherboard, wherein a power amplifier board to be tested, a buffer amplifier board, a buffer signal tuning matching network, a buffer absorption load, a power amplifier signal tuning matching network, a power amplifier absorption load, a power supply conversion module, a control switch and an integrated panel are arranged on the test motherboard; the power supply conversion module is connected with an external power supply to supply power to the system; the control switch comprises a single-pole double-throw switch, a first control switch, a second control switch and a third control switch. The invention adopts the form of a motherboard, concentrates main functional components on the motherboard, tests the power amplifier board by inserting the power amplifier board to be tested and forming a radio frequency channel on the motherboard in cooperation with the oscillator, has simple structure and convenient use, and greatly improves the convenience of testing the power module. The test platform can greatly reduce the failure rate of direct on-machine test by performing the simulated on-machine test on the power module.
Description
Technical Field
The invention relates to the technical field of radio frequency debugging, in particular to a test platform for a power module of a high-power medium wave transmitter.
Background
At present, a high-power medium-wave transmitter needs dozens of or even hundreds of power modules to synthesize transmission power, and the hundreds of power modules have strict performance parameter requirements, but are limited in debugging conditions, cannot test the output power of the power modules, only can be directly tested on a computer, and can be directly tested on the computer to cause module burnout in large quantities, thereby often causing shutdown and influencing the task played by the transmitter.
Because the module is often burnt, so that a debugging worker often crouches to maintain the power module beside the transmitter, not only is a large amount of human resources consumed, but also the maintained power module can not ensure whether to meet the parameter requirement, and the secondary module burning phenomenon can also occur after the power module is operated on the computer again for testing.
At present, no comprehensive test platform is made on the test of a high-power medium-wave power module, and based on the fact that the invention is developed by our company, the fault rate of direct on-machine test is greatly reduced by performing simulated on-machine test on the power module.
Disclosure of Invention
The invention aims to provide a test platform for a power module of a high-power medium-wave transmitter, which greatly reduces the fault rate of direct on-board test by performing simulated on-board test on the power module.
In order to achieve the purpose, the technical scheme of the invention is as follows: a test platform of a power module comprises a test motherboard, wherein a power amplifier board to be tested, a buffer amplifier board, a buffer signal tuning matching network, a buffer absorption load, a power amplifier signal tuning matching network, a power amplifier absorption load, a power supply conversion module, a control switch and an integrated panel are arranged on the test motherboard; the power supply conversion module is connected with an external power supply to supply power to the system, wherein the power supply conversion module provides a working power supply and a starting power supply for the power amplifier board to be tested; the control switch comprises a single-pole double-throw switch, a first control switch, a second control switch and a third control switch, and the first control switch is arranged on a power supply line of the starting power supply;
the input end of the buffer amplifier board is connected with an oscillator, the first output end of the buffer amplifier board is connected to the first input end of a buffer signal tuning matching network, the second output end of the buffer amplifier board is connected to the moving end of a single-pole double-throw switch, the first fixed end of the single-pole double-throw switch is connected to the second input end of the buffer signal tuning matching network, the output end of the buffer signal tuning matching network is connected to a buffer absorption load, the second fixed end of the single-pole double-throw switch is provided with a first branch and a second branch, the first branch is connected to the first input end of the power amplifier board to be tested through a second control switch, the second branch is connected to the second input end of the power amplifier board to be tested through a third control switch, the first output end of the power amplifier board to be tested is connected to the first input end of the power amplifier signal tuning matching network, the second output end of the power amplifier board to be tested is connected to the second input end of the power amplifier signal tuning matching network, and the output end of the power amplifier signal tuning matching network is connected to the power amplifier absorption load;
the oscillator outputs an excitation signal, the excitation signal is amplified by a buffer amplifier board and then outputs two identical buffer amplification signals A, B, the buffer amplification signal A is tuned and matched by a buffer signal tuning and matching network and then is absorbed by a buffer absorption load, the buffer amplification signal B is selected by a single-pole double-throw switch, when the output is not needed, the single-pole double-throw switch is closed to a first fixed end, the buffer amplification signal B is tuned and matched by the buffer signal tuning and matching network and then is absorbed by the buffer absorption load, when the output is needed, the single-pole double-throw switch is closed to a second fixed end, a first control switch, a second control switch and a third control switch are all closed, the buffer amplification signal B is divided into two paths and output to a power amplifier board to be detected, the power amplifier board amplifies the two paths of buffer amplification signals B again and then respectively outputs radio frequency normal phase signals and radio frequency reverse phase signals with the same magnitude and amplitude, the radio frequency normal phase signals and the radio frequency reverse phase signals are matched by a power amplifier signal tuning and matching network and then output radio frequency signals, and the radio frequency signals are absorbed by the power amplifier absorption load;
the controller of the single-pole double-throw switch, the controller of the first control switch, the controller of the second control switch and the controller of the third control switch are integrated on the integrated panel, a first indicator lamp for detecting the working power supply and a second indicator lamp for detecting the starting power supply are further integrated on the integrated panel, a voltmeter and an ammeter for detecting the working power supply and a power meter for detecting the radio-frequency signal power are further integrated on the integrated panel, a voltage adjusting knob for adjusting the voltage of the working power supply is further integrated on the integrated panel, and a first oscilloscope interface for detecting the waveform of the buffer amplified signal A, a second oscilloscope interface for detecting the waveform of the buffer amplified signal B, a third oscilloscope interface for detecting the waveform of the radio-frequency normal-phase signal and a fourth oscilloscope interface for detecting the waveform of the radio-frequency reverse-phase signal are further integrated on the integrated panel.
Furthermore, the integrated cooling system further comprises a fan for cooling the system, the power supply conversion module is connected with the fan and used for supplying power to the fan, a fan starting switch is arranged on a power supply line of the fan, and a controller of the fan starting switch is integrated on the integrated panel.
Furthermore, an external power supply access switch is arranged on a power supply line of the external power supply, and a controller of the external power supply access switch is integrated on the integrated panel.
Furthermore, the power conversion module is provided with a power output switch for outputting the power consumption of the system, and a controller of the power output switch is integrated on the integrated panel.
A method for testing a power module using a test platform for the power module, comprising the steps of:
step 1, mounting a power amplifier board to be tested on a test mother board, starting an external power access switch, a power conversion module starting switch and a fan starting switch, and entering step 2 if a first indicator light and a second indicator light are displayed normally;
step 3, closing the single-pole double-throw switch to a second fixed end, closing the first control switch, the second control switch and the third control switch, respectively accessing oscilloscopes to a third oscilloscope interface and a fourth oscilloscope interface, and entering step 4 if the radio frequency positive phase signal and the radio frequency reverse phase signal have the same waveform size and amplitude but opposite phases;
and 4, gradually increasing the voltage of the working power supply to a designed value, if the reading of the ammeter is gradually increased in the voltage change process, and meanwhile, the power value of the power meter is gradually increased to reach the designed value, the power amplifier board to be tested is qualified, otherwise, the power amplifier board to be tested is unqualified.
The beneficial effects of the invention are: the test platform can greatly reduce the failure rate of direct on-machine test by performing the simulated on-machine test on the power module. The invention adopts the form of a motherboard, concentrates main functional components on the motherboard, tests the power amplifier board by inserting the power amplifier board to be tested and forming a radio frequency channel on the motherboard in cooperation with the oscillator, has simple structure and convenient use, and greatly improves the convenience of testing the power module.
Drawings
FIG. 1 is a functional block diagram of the present invention;
fig. 2 is a schematic structural diagram of an integrated panel.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.
As shown in fig. 1-2, a test platform for a power module includes a test motherboard A2, where the test motherboard A2 is provided with a power amplifier board A4 to be tested, a buffer amplifier board A3, a buffer signal tuning matching network, a buffer absorption load, a power amplifier signal tuning matching network, a power amplifier absorption load, a power supply conversion module, a control switch, and an integrated panel; the power supply conversion module is connected with an external power supply to supply power to the system, wherein the power supply conversion module provides a working power supply and a starting power supply for the power amplifier board A4 to be tested; the control switch comprises a single-pole double-throw switch S1, a first control switch S2, a second control switch S3 and a third control switch S4, and the first control switch S2 is arranged on a power supply line of the starting power supply;
the input end of the buffer amplifier board A2 is connected with an oscillator A1, the first output end of the buffer amplifier board A2 is connected to the first input end of a buffer signal tuning matching network, the second output end of the buffer amplifier board A2 is connected to the moving end of a single-pole double-throw switch S1, the first fixed end of the single-pole double-throw switch S1 is connected to the second input end of the buffer signal tuning matching network, the output end of the buffer signal tuning matching network is connected to a buffer absorption load, the second fixed end of the single-pole double-throw switch S1 is provided with a first branch and a second branch, the first branch is connected to the first input end of a power amplifier board A4 to be tested through a second control switch S3, the second branch is connected to the second input end of a power amplifier board A4 to be tested through a third control switch S4, the first output end of the power amplifier board A4 to be tested is connected to the first input end of the power amplifier signal tuning matching network, the second output end of the power amplifier board A4 to be tested is connected to the second input end of the power amplifier signal tuning matching network, and the output end of the power amplifier signal tuning matching network is connected to the power amplifier absorption load;
the oscillator A1 outputs an excitation signal, the excitation signal is amplified by a buffer amplifier board A3 and then outputs two identical buffer amplification signals A, B, the buffer amplification signal A is tuned and matched by a buffer signal tuning and matching network and then is absorbed by a buffer absorption load, a buffer amplification signal B is selected through a single-pole double-throw switch S1, when the output is not needed, the single-pole double-throw switch S1 is closed to a first fixed end, the buffer amplification signal B is tuned and matched by the buffer signal tuning and then is absorbed by the buffer absorption load, when the output is needed, the single-pole double-throw switch S1 is closed to a second fixed end, a first control switch S2, a second control switch S3 and a third control switch S4 are all closed, the buffer amplification signal B is output to a power amplifier board A4 to be detected in two ways, the two buffer amplification signals B are amplified again by the single-pole double-throw switch S1 and then respectively output radio frequency signals with the same magnitude and amplitude, the radio frequency signals are output as normal phase radio frequency signals and radio frequency reverse phase signals, the radio frequency signals are output and tuned and absorbed by the radio frequency reverse phase signals after the matching network and matching, and the radio frequency tuning and matching signals are amplified by the power amplifier load;
the controller of the single-pole double-throw switch S1, the controller of the first control switch S2, the controller of the second control switch S3 and the controller of the third control switch S4 are integrated on the integrated panel, the integrated panel is further integrated with a first indicator lamp DS1 for detecting the working power supply and a second indicator lamp DS2 for detecting the starting power supply, the integrated panel is further integrated with a voltmeter PV1 for detecting the working power supply, an ammeter PA1 for detecting the working power supply and a power meter PR1 for detecting the radio-frequency signal power, the integrated panel is further integrated with a voltage adjusting knob ADJ1 for adjusting the voltage of the working power supply, and the integrated panel is further integrated with a first oscilloscope interface J1 for detecting the waveform of a buffering amplification signal A, a second oscilloscope interface J2 for detecting the waveform of a buffering amplification signal B, a third oscilloscope interface J3 for detecting the waveform of a radio-frequency positive-phase signal and a fourth oscilloscope interface J4 for detecting the waveform of a radio-frequency negative-phase signal.
The fan cooling system is characterized by further comprising a fan for cooling the system, the power supply conversion module is connected with the fan and used for supplying power to the fan, a fan starting switch K3 is arranged on a power supply line of the fan, and a controller of the fan starting switch K3 is integrated on the integrated panel.
An external power supply access switch K1 is arranged on a power supply line of the external power supply, and a controller of the external power supply access switch K1 is integrated on the integrated panel. The power supply conversion module is provided with a power supply output switch K2 used for outputting power consumption of the system, and a controller of the power supply output switch K2 is integrated on the integrated panel.
The test platform can greatly reduce the failure rate of direct on-machine test by performing the simulated on-machine test on the power module. The invention adopts the form of a motherboard, concentrates main functional components on the motherboard, tests the power amplifier board by inserting the power amplifier board to be tested and forming a radio frequency channel on the motherboard in cooperation with the oscillator, has simple structure and convenient use, and greatly improves the convenience of testing the power module.
The power module testing platform can be used for detecting the power module, and the detection method comprises the following steps:
step 1, mounting a power amplifier board to be tested on a test mother board, starting an external power access switch, a power conversion module starting switch and a fan starting switch, and entering step 2 if a first indicator light and a second indicator light are displayed normally;
step 3, closing the single-pole double-throw switch to a second fixed end, closing the first control switch, the second control switch and the third control switch, respectively accessing oscilloscopes to a third oscilloscope interface and a fourth oscilloscope interface, and entering step 4 if the radio frequency positive phase signal and the radio frequency reverse phase signal have the same waveform size and amplitude but opposite phases;
and 4, gradually increasing the voltage of the working power supply to a designed value, if the reading of the ammeter is gradually increased in the voltage change process, and meanwhile, the power value of the power meter is gradually increased to reach the designed value, the power amplifier board to be tested is qualified, otherwise, the power amplifier board to be tested is unqualified.
The described embodiments are only some embodiments of the invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Claims (5)
1. A test platform of a power module is characterized by comprising a test mother board, wherein a power amplifier board to be tested, a buffer amplifier board, a buffer signal tuning matching network, a buffer absorption load, a power amplifier signal tuning matching network, a power amplifier absorption load, a power supply conversion module, a control switch and an integrated panel are arranged on the test mother board; the power supply conversion module is connected with an external power supply to supply power to the system, wherein the power supply conversion module provides a working power supply and a starting power supply for the power amplifier board to be tested; the control switch comprises a single-pole double-throw switch, a first control switch, a second control switch and a third control switch, and the first control switch is arranged on a power supply line of the starting power supply;
the input end of the buffer amplifier board is connected with an oscillator, the first output end of the buffer amplifier board is connected to the first input end of a buffer signal tuning matching network, the second output end of the buffer amplifier board is connected to the moving end of a single-pole double-throw switch, the first fixed end of the single-pole double-throw switch is connected to the second input end of the buffer signal tuning matching network, the output end of the buffer signal tuning matching network is connected to a buffer absorption load, the second fixed end of the single-pole double-throw switch is provided with a first branch and a second branch, the first branch is connected to the first input end of the power amplifier board to be tested through a second control switch, the second branch is connected to the second input end of the power amplifier board to be tested through a third control switch, the first output end of the power amplifier board to be tested is connected to the first input end of the power amplifier signal tuning matching network, the second output end of the power amplifier board to be tested is connected to the second input end of the power amplifier signal tuning matching network, and the output end of the power amplifier signal tuning matching network is connected to the power amplifier absorption load;
the oscillator outputs an excitation signal, the excitation signal is amplified by a buffer amplifier board and then outputs two identical buffer amplification signals A, B, the buffer amplification signal A is tuned and matched by a buffer signal tuning and matching network and then is absorbed by a buffer absorption load, the buffer amplification signal B is selected by a single-pole double-throw switch, when the output is not needed, the single-pole double-throw switch is closed to a first fixed end, the buffer amplification signal B is tuned and matched by the buffer signal tuning and matching network and then is absorbed by the buffer absorption load, when the output is needed, the single-pole double-throw switch is closed to a second fixed end, a first control switch, a second control switch and a third control switch are all closed, the buffer amplification signal B is divided into two paths and output to a power amplifier board to be detected, the power amplifier board amplifies the two paths of buffer amplification signals B again and then respectively outputs radio frequency normal phase signals and radio frequency reverse phase signals with the same magnitude and amplitude, the radio frequency normal phase signals and the radio frequency reverse phase signals are matched by a power amplifier signal tuning and matching network and then output radio frequency signals, and the radio frequency signals are absorbed by the power amplifier absorption load;
the controller of the single-pole double-throw switch, the controller of the first control switch, the controller of the second control switch and the controller of the third control switch are integrated on the integrated panel, a first indicator lamp for detecting the working power supply and a second indicator lamp for detecting the starting power supply are further integrated on the integrated panel, a voltmeter, an ammeter and a power meter for detecting the power of the radio frequency signal are further integrated on the integrated panel, a voltage adjusting knob for adjusting the voltage of the working power supply is further integrated on the integrated panel, and a first oscilloscope interface for detecting the waveform of the buffer amplification signal A, a second oscilloscope interface for detecting the waveform of the buffer amplification signal B, a third oscilloscope interface for detecting the waveform of the radio frequency normal phase signal and a fourth oscilloscope interface for detecting the waveform of the radio frequency reverse phase signal are further integrated on the integrated panel.
2. The test platform of claim 1, further comprising a fan for cooling the system, wherein the power conversion module is connected to the fan to supply power to the fan, a fan start switch is disposed on a power supply line of the fan, and a controller of the fan start switch is integrated on the integrated panel.
3. The test platform of claim 2, wherein an external power access switch is disposed on a power supply line of the external power supply, and a controller of the external power access switch is integrated on the integrated panel.
4. A test platform for power modules according to claim 3, wherein the power conversion module is provided with a power output switch for outputting system power, and the controller of the power output switch is integrated on the integrated panel.
5. A method for testing a power module using the test platform of claim 4, comprising the steps of:
step 1, mounting a power amplifier board to be tested on a test mother board, starting an external power access switch, a power output switch and a fan starting switch, and entering step 2 if a first indicator light and a second indicator light are displayed normally;
step 2, respectively accessing oscilloscopes to the first oscilloscope interface and the second oscilloscope interface, closing the single-pole double-throw switch to the first fixed end, and entering step 3 if the waveforms of the buffered amplified signal A, B are the same;
step 3, closing the single-pole double-throw switch to a second fixed end, closing the first control switch, the second control switch and the third control switch, respectively accessing oscilloscopes to a third oscilloscope interface and a fourth oscilloscope interface, and entering step 4 if the radio frequency positive phase signal and the radio frequency reverse phase signal have the same waveform size and amplitude but opposite phases;
and 4, gradually increasing the voltage of the working power supply to a designed voltage value, gradually increasing the reading of the ammeter in the voltage change process, and gradually increasing the power value of the power meter to the designed power value, so that the power amplifier board to be tested is qualified, otherwise, the power amplifier board to be tested is unqualified.
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| CN202011533138.XA CN112684322B (en) | 2020-12-22 | 2020-12-22 | Test platform of power module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011533138.XA CN112684322B (en) | 2020-12-22 | 2020-12-22 | Test platform of power module |
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| CN112684322B true CN112684322B (en) | 2022-11-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112986669B (en) * | 2021-05-12 | 2021-08-10 | 成都信息工程大学 | Radio frequency power detection circuit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103744010A (en) * | 2013-12-26 | 2014-04-23 | 中国电子科技集团公司第三十六研究所 | An automatic testing system and an automatic testing method of a continuous wave radio frequency power amplifier |
| CN104569589A (en) * | 2014-12-24 | 2015-04-29 | 北京无线电测量研究所 | Device and method for automatically testing Ku waveband phase difference of multi-branch power amplifier |
| CN204761447U (en) * | 2015-08-11 | 2015-11-11 | 陈晋 | DX type medium wave transmitter power amplifier module intelligent test platform |
| CN105510738A (en) * | 2015-11-27 | 2016-04-20 | 电子科技大学 | Automatic testing system of non-linear thermal parameter of high-power microwave device and testing method thereof |
| CN210469338U (en) * | 2019-12-23 | 2020-05-05 | 成都菲斯洛克电子技术有限公司 | Signal source extension set for microwave power capacity tester |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7652464B2 (en) * | 2006-05-05 | 2010-01-26 | Viasat, Inc. | RF power sensor with chopping amplifier |
| US9871540B2 (en) * | 2012-10-16 | 2018-01-16 | Qualcomm Incorporated | Integrated real power detector |
-
2020
- 2020-12-22 CN CN202011533138.XA patent/CN112684322B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103744010A (en) * | 2013-12-26 | 2014-04-23 | 中国电子科技集团公司第三十六研究所 | An automatic testing system and an automatic testing method of a continuous wave radio frequency power amplifier |
| CN104569589A (en) * | 2014-12-24 | 2015-04-29 | 北京无线电测量研究所 | Device and method for automatically testing Ku waveband phase difference of multi-branch power amplifier |
| CN204761447U (en) * | 2015-08-11 | 2015-11-11 | 陈晋 | DX type medium wave transmitter power amplifier module intelligent test platform |
| CN105510738A (en) * | 2015-11-27 | 2016-04-20 | 电子科技大学 | Automatic testing system of non-linear thermal parameter of high-power microwave device and testing method thereof |
| CN210469338U (en) * | 2019-12-23 | 2020-05-05 | 成都菲斯洛克电子技术有限公司 | Signal source extension set for microwave power capacity tester |
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