CN114355228A - Single event effect test system and method for optical fiber communication module - Google Patents
Single event effect test system and method for optical fiber communication module Download PDFInfo
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Abstract
The invention relates to a single event effect test system and a single event effect test method for an optical fiber communication module.A moving target, a heavy ion gun, an FPGA and a second repeater are all arranged in a vacuum irradiation chamber; the optical fiber communication module to be detected is arranged on the movable target; the SMA joint is arranged on the wall of the vacuum irradiation chamber; one channel of the tested optical fiber communication module is connected to the SMA connector and then connected to the error code meter; the other channels of the tested optical fiber communication module are connected with the FPGA, and the FPGA is connected to the data acquisition computer through a DB9 serial port; the power supply provides direct current stable voltage for the tested optical fiber communication module and the FPGA; the main control computer is connected with a power supply; the main control computer, the communication board and the first repeater are connected in sequence, and the first repeater is connected with the internal register of the tested optical fiber communication module through the DB9 serial port and the second repeater. The invention relates to a single event effect testing system and a single event effect testing method for an optical fiber communication module, which can test the single event effect of the optical fiber communication module.
Description
Technical Field
The invention relates to a single event effect testing technology, in particular to a single event effect testing system and a single event effect testing method for an optical fiber communication module.
Background
With the current in-orbit application of high-throughput satellites, high-resolution cameras, and internet satellites, data is generated up to Gbit per second. At present, data transmission mainly based on copper wires can only reach hundreds of Mbps, the transmission distance is severely limited, and the requirements on high speed and bandwidth cannot be met, so that the optical wave communication technology increasingly shows the trend of adapting to space navigation communication requirements, and a high-speed communication network based on an optical module receives wide attention. The optical module concentrates the optical power in a very narrow light beam, the electromagnetic interference among all communication links is small, the confidentiality is high, the size, the weight and the power consumption of a device are obviously reduced, the transmission rate can reach several Gbps to dozens of Gbps, and the optical module has the potential of being widely applied to space vehicles, particularly microsatellites. However, the charged particles in the spatial radiation environment can induce the fiber communication module to generate effects such as single-event upset (SEU), single-event latch (SEL), etc., which cause phenomena such as communication error and latch, etc., resulting in communication abnormality.
Because the optical fiber communication module has no aerospace stress experience and lacks of a mature single-particle testing system and a testing means, the optical fiber communication module needs to be designed and optimized according to the environment of a heavy ion accelerator testing device of the Chinese atomic energy science research institute so as to achieve the testing capability of the effects of single-particle upset, single-particle latch-up and the like of the optical fiber communication module.
Disclosure of Invention
The invention aims to provide a single event effect testing system and a single event effect testing method for an optical fiber communication module, which solve the problem of single event effect testing of the optical fiber communication module.
In order to achieve the above object, the present invention provides a single event effect testing system for an optical fiber communication module, which includes a power control and testing system; the power supply control and test system comprises a vacuum irradiation system, an error code instrument, a main control computer, a power supply, a communication board, a first repeater and a data acquisition computer; the vacuum irradiation system comprises a vacuum irradiation chamber, a moving target, a heavy ion gun, an SMA joint, an FPGA, a second repeater and an SMA joint; the moving target, the heavy ion gun, the FPGA and the second repeater are all arranged in the vacuum irradiation chamber; the optical fiber communication module to be detected is arranged on the movable target; the SMA joint is arranged on the wall of the vacuum irradiation chamber; one channel of the tested optical fiber communication module is connected to an SMA connector, and the SMA connector is connected to an error code meter; the other channels of the tested optical fiber communication module are connected with the FPGA, and the FPGA is connected to the data acquisition computer through a DB9 serial port; the power supply provides direct current stable voltage for the tested optical fiber communication module and the FPGA; the main control computer is connected with a power supply; the main control computer, the communication board and the first repeater are sequentially connected, and the first repeater is connected with a register configured in the tested optical fiber communication module through a DB9 serial port and the second repeater.
The single event effect test system of the optical fiber communication module further comprises a remote monitoring system, wherein the remote monitoring system comprises a remote monitoring computer; the remote monitoring computer is respectively connected with the main control computer, the error code meter and the data acquisition computer through a network cable and a network switch, and a tester realizes the control of the main control computer through the remote monitoring computer and displays the interface of the main control computer, thereby achieving the purpose of remote monitoring.
The single event effect test system of the optical fiber communication module is characterized in that the error code meter sends pseudo-random codes to the tested optical fiber communication module through the SMA connector and then receives information processed by the tested optical fiber communication module, the error code meter calculates an error rate by comparing transmitted data with received data and displays the error rate on the main control computer, and the error rate is the error rate of one channel connected with the tested optical fiber communication module and the error code meter; and the data acquisition computer reads the internal data of the FPGA and counts the bit error rate of the rest channels of the tested optical fiber communication module.
According to the single event effect test system of the optical fiber communication module, the main control computer is connected with the power supply through the USB to realize access and is used for controlling the power supply voltage and detecting the power supply current.
In the single event effect test system of the optical fiber communication module, during irradiation, the main control computer circularly reads the stored data of the internal register of the measured optical fiber communication module through the communication board, compares the stored data, counts and displays the logic state overturning condition of the stored data in the measured optical fiber communication module, wherein the overturning condition comprises the overturning digit number, the overturning digit address and the overturning time.
According to the single event effect test system for the optical fiber communication module, if the main control computer monitors that the power supply current of the pin of the tested optical fiber communication module suddenly and steeply increases to 1.5 times of the normal state, the main control computer controls the power supply to pull down the pin voltage of the tested optical fiber communication module, so that the tested optical fiber communication module is in an abnormal function state, and the normal working state can be recovered only by restarting the tested optical fiber communication module after power failure along with the abnormal function, and then the single event latch occurs.
The single event effect test system of the optical fiber communication module is characterized in that the main control computer comprises a temperature monitoring module, a power supply control module, a bit error rate monitoring module, a current monitoring module, an overturning monitoring module and a latching monitoring module; the power supply control module is used for remotely controlling a power supply and realizing the real-time voltage control of the tested optical fiber communication module; the current monitoring module is used for monitoring and recording the current change of the power supply and is used as an important basis for judging whether latch-up occurs or not; the turnover monitoring module and the latch monitoring module are used for monitoring the working state of the tested optical fiber communication module, observing the test phenomenon of single event effect and recording test data in real time; and the error rate monitoring module monitors the error rate change rule caused by the single event effect according to the error rate counted by the error code meter and the data acquisition computer.
The invention also provides another technical scheme which is a single event effect testing method of the optical fiber communication module, the single event effect testing system of the optical fiber communication module is adopted, and the method comprises the following steps:
s1, preparation before testing;
s2, setting heavy ion gun parameters;
s3, starting test software, starting irradiation on the optical fiber communication module to be tested, monitoring and recording abnormal phenomena in real time, and recording the start time, the end time, the type of incident heavy ions, the LET energy value, the incident depth in silicon, the total fluence, the fluence rate and other information of the test;
during the irradiation process, the main control computer circularly reads the stored data of the register inside the optical fiber communication module to be measured through the communication board, compares the stored data, counts the logic state overturning condition of the stored data inside the optical fiber communication module to be measured and displays the logic state overturning condition;
monitoring power supply current by a main control computer, and if the power supply current of a pin of the tested optical fiber communication module is suddenly and abruptly increased to 1.5 times of the normal state, controlling a power supply to pull down the pin voltage of the tested optical fiber communication module by the main control computer so that the tested optical fiber communication module is in an abnormal function state, and if the tested optical fiber communication module is restarted to recover the normal working state along with the abnormal function, considering that single event latch occurs at the moment, and increasing the number of single event latch effect by 1; after single event latchup occurs, the heavy ion gun is closed to stop irradiation, the heavy ion gun is opened to perform irradiation after the detected optical fiber communication module is restarted after power failure occurs, and the main control computer monitors the change condition of the power supply current again until the single event latchup effect times reach 3 times or the injection reaches 10 times7ions/cm2；
S4, when the test meets the requirement, the heavy ion gun is closed to stop irradiation, the power-off and power-on of the tested optical fiber communication module are repeated for 5 times, and whether the tested optical fiber communication module is normal in function is detected;
s5, calculating the turnover times and the latch times under the LET energy value;
and S6, changing the LET energy value, returning to the step S2, and performing heavy ion irradiation of the next LET energy value until the irradiation tests under all LET energy values are completed.
Compared with the prior art, the invention has the beneficial technical effects that:
the single event effect test system and the single event effect test method for the optical fiber communication module can test the single event effect of the optical fiber communication module, can simultaneously detect communication data of at most 12 channels, obtain the single event effect phenomenon and rule of the optical fiber communication module, realize accurate evaluation on the single event resistance of the optical fiber communication module, and guide the application of radiation-resistant reinforcement design and aerospace reliability of devices.
Drawings
The single event effect testing system and method of the optical fiber communication module of the invention are given by the following embodiments and the attached drawings.
Fig. 1 is a schematic diagram of a single event effect testing system of an optical fiber communication module according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a remote monitoring computer interface according to an embodiment of the present invention.
FIG. 3 is a schematic diagram of a data collection computer interface according to an embodiment of the present invention.
Fig. 4 is a schematic diagram illustrating bit error rate statistics of a host computer interface according to an embodiment of the present invention.
Fig. 5 is a flowchart of a single event effect testing method for an optical fiber communication module according to an embodiment of the present invention.
Detailed Description
The single event effect testing system and method of the optical fiber communication module according to the present invention will be described in further detail with reference to fig. 1 to 5.
Fig. 1 is a schematic diagram of a single event effect testing system of an optical fiber communication module according to an embodiment of the present invention.
Referring to fig. 1, the single event effect test system of the optical fiber communication module of the present embodiment includes a power control and test system and a remote monitoring system;
the remote monitoring system comprises a remote monitoring computer;
the power supply control and test system comprises a vacuum irradiation system, an error code instrument, a main control computer, a power supply, a communication board, a first repeater and a data acquisition computer;
the vacuum irradiation system comprises a vacuum irradiation chamber, a moving target, a heavy ion gun, an SMA joint, an FPGA, a second repeater and an SMA joint; the moving target, the heavy ion gun, the FPGA and the second repeater are all arranged in the vacuum irradiation chamber; the SMA joint is arranged on the wall of the vacuum irradiation chamber;
the error code instrument, the main control computer, the power supply, the communication board, the first repeater and the data acquisition computer are all arranged on a test board.
The remote monitoring computer of the remote monitoring system is respectively connected with the main control computer, the error code meter and the data acquisition computer through a network cable and a network switch (router), and a tester realizes the control of the main control computer through the remote monitoring computer and displays the interface of the main control computer, thereby achieving the purpose of remote monitoring. Fig. 2 is a schematic diagram illustrating an interface of a remote monitoring computer according to an embodiment of the present invention, where the display information includes information such as temperature, voltage, register turnover number, and the like of a detected optical fiber communication module.
The vacuum irradiation system realizes irradiation on the optical fiber communication module to be measured; the optical fiber communication module to be detected is arranged on the movable target; in this embodiment, the measured optical fiber communication module has 12 channels, one of the channels is connected to the SMA connector through the radio frequency line, the SMA connector is connected to the error detector through the radio frequency line, the other 11 channels are connected to the FPGA, the FPGA is connected to the data acquisition computer through the DB9 serial port, the data acquisition computer performs statistics on the error rate of the measured channel, and fig. 3 is a schematic diagram of an interface of the data acquisition computer in the embodiment of the present invention.
The power supply control and test system is the core of the whole single event effect test system of the optical fiber communication module, is positioned outside the vacuum irradiation chamber and realizes the functions of power supply voltage control, current monitoring, data acquisition and the like. The power supply of the power supply control and test system is used for providing direct current stable voltage for the devices in the vacuum irradiation chamber, and the optical fiber communication module to be tested and the FPGA are connected with the power supply through DB9 serial ports; the main control computer is connected with the power supply through a USB to realize access and is used for controlling the power supply voltage and detecting the power supply current.
The main control computer, the communication board and the first repeater are sequentially connected, and the first repeater is connected with a register configured in the tested optical fiber communication module through a DB9 serial port and the second repeater.
The error code meter sends pseudo-random codes to the tested optical fiber communication module through the radio frequency wire and the SMA connector, then receives information processed by the tested optical fiber communication module, compares the transmitted data with the received data, calculates error code rates according to different data, and displays the error code rates on the main control computer, as shown in FIG. 4, the error code rate is the error code rate of one channel connected with the tested optical fiber communication module and the error code meter.
And the data acquisition computer adopts an RS-232 protocol to realize the connection of the FPGA in the vacuum irradiation chamber, reads the internal data of the FPGA and counts the error rates of the rest 11 channels of the optical fiber communication module to be measured.
As shown in fig. 4, the main control computer includes a temperature monitoring module, a power control module, a bit error rate monitoring module, a current monitoring module, a rollover monitoring module, a latch monitoring module, and other functional modules. The power supply control module is used for remotely controlling a power supply and realizing the real-time voltage control of the tested optical fiber communication module; the current monitoring module is used for monitoring and recording the current change of the power supply and is used as an important basis for judging whether latch-up occurs or not; the turnover monitoring module and the latch monitoring module are used for monitoring the working state of the tested optical fiber communication module, observing the test phenomenon of single event effect and recording test data in real time; and the error rate monitoring module monitors the error rate change rule caused by the single event effect according to the error rate counted by the error code meter and the data acquisition computer.
Fig. 5 is a flowchart of a single event effect testing method for an optical fiber communication module according to an embodiment of the present invention.
The single event effect testing method for the optical fiber communication module comprises the following steps:
s1, preparation before testing
In order to ensure that heavy ions can be injected into a sensitive area of the optical fiber communication module to be detected in the irradiation process, the optical fiber communication module to be detected needs to be uncapped before irradiation; after the cap is opened, the function and performance tests are carried out, so that the tested optical fiber communication module can be kept normal;
fixing the optical fiber communication module to be detected on a movable target of a vacuum irradiation chamber, ensuring the movement consistency of the optical fiber communication module to be detected and the movable target, and ensuring that incident heavy ions are irradiated on the surface of a sensitive area of the optical fiber communication module to be detected and cannot be blocked at any angle;
the whole test system is built according to the figure 1, the FPGA is placed in a vacuum irradiation chamber, a power supply and an error code meter are placed outside the vacuum irradiation chamber, and indoor and outdoor device connection is realized through a DB9 joint and an SMA joint on the cabin wall of the vacuum irradiation chamber; after the connection is finished, the communication of the single event effect test system of the optical fiber communication module is checked to ensure that all functions are normal;
setting IP and time of an error code meter, a main control computer and a monitoring computer, enabling all equipment to be in the same local area network segment, enabling the time to be completely consistent and accurate to seconds, and vacuumizing a vacuum irradiation chamber after all preparation work is finished;
s2 setting heavy ion gun parameters
Adjusting the LET energy value of heavy ions of the heavy ion gun, selecting a proper light spot according to the size of the measured optical fiber communication module, calibrating an irradiation central point (namely the position of the center of the measured optical fiber communication module), ensuring that an irradiation area meets the test requirement, and simultaneously not influencing other devices;
s3, opening screen recording software on the monitoring computer (namely starting test software), starting to irradiate the optical fiber communication module to be tested, monitoring and recording abnormal phenomena in real time, and recording the test starting time, ending time, incident heavy ion type, LET energy value, incident depth in silicon, total fluence, fluence rate and other information;
during irradiation, the main control computer circularly reads the stored data of the register in the tested optical fiber communication module through the communication board, compares the stored data, counts the logic state overturning condition of the stored data in the tested optical fiber communication module, and displays the overturning digit, the overturning digit address, the overturning time and the like;
monitoring power supply current by a main control computer, and if the power supply current of a pin of the tested optical fiber communication module is suddenly and abruptly increased to 1.5 times of the normal state, controlling a power supply to pull down the pin voltage of the tested optical fiber communication module by the main control computer so that the tested optical fiber communication module is in an abnormal function state, and if the tested optical fiber communication module is restarted to recover the normal working state along with the abnormal function, considering that single event latch occurs at the moment, and increasing the number of single event latch effect by 1; after the occurrence of a single event latch-up,closing the heavy ion gun to stop irradiation, restarting the tested optical fiber communication module after power failure, then opening the heavy ion gun to perform irradiation, and monitoring the change condition of the power supply current again by the main control computer until the single-event latch-up frequency reaches 3 times or the injection reaches 10 times7ions/cm2；
S4, testing to meet the requirement (that is, the single event latch-up times reach 3 times or the fluence reaches 10 times)7ions/cm2) When the optical fiber communication module is in normal operation, the heavy ion gun is turned off to stop irradiation, the power-off and power-on of the optical fiber communication module to be detected are repeated for 5 times, and whether the optical fiber communication module to be detected is in normal operation is detected;
s5, calculating the turnover times and the latch times under the LET energy value;
and S6, changing the LET energy value, returning to the step S2, and performing heavy ion irradiation of the next LET energy value until the irradiation tests under all LET energy values are completed.
Those skilled in the art will appreciate that the invention may be practiced without these specific details.
Claims (10)
1. The single event effect test system of the optical fiber communication module is characterized by comprising a power supply control and test system; the power supply control and test system comprises a vacuum irradiation system, an error code instrument, a main control computer, a power supply, a communication board, a first repeater and a data acquisition computer;
the vacuum irradiation system comprises a vacuum irradiation chamber, a moving target, a heavy ion gun, an SMA joint, an FPGA, a second repeater and an SMA joint; the moving target, the heavy ion gun, the FPGA and the second repeater are all arranged in the vacuum irradiation chamber; the optical fiber communication module to be detected is arranged on the movable target; the SMA joint is arranged on the wall of the vacuum irradiation chamber;
one channel of the tested optical fiber communication module is connected to an SMA connector, and the SMA connector is connected to an error code meter; the other channels of the tested optical fiber communication module are connected with the FPGA, and the FPGA is connected to the data acquisition computer through a DB9 serial port;
the power supply provides direct current stable voltage for the tested optical fiber communication module and the FPGA; the main control computer is connected with a power supply;
the main control computer, the communication board and the first repeater are sequentially connected, and the first repeater is connected with a register configured in the tested optical fiber communication module through a DB9 serial port and the second repeater.
2. The single event effect testing system of the optical fiber communication module of claim 1, wherein the single event effect testing system of the optical fiber communication module further comprises a remote monitoring system, the remote monitoring system comprises a remote monitoring computer; the remote monitoring computer is respectively connected with the main control computer, the error code meter and the data acquisition computer through a network cable and a network switch, and a tester realizes the control of the main control computer through the remote monitoring computer and displays the interface of the main control computer, thereby achieving the purpose of remote monitoring.
3. The single event effect testing system of the optical fiber communication module of claim 1, wherein the error code meter sends pseudo-random code to the optical fiber communication module to be tested through the SMA connector, and then receives the information processed by the optical fiber communication module to be tested, the error code meter calculates the error rate by comparing the transmitted data with the received data and displays the error rate on the main control computer, the error rate is the error rate of one channel connected with the error code meter by the optical fiber communication module to be tested; and the data acquisition computer reads the internal data of the FPGA and counts the bit error rate of the rest channels of the tested optical fiber communication module.
4. The single event effect testing system of claim 1, wherein the main control computer is accessible by USB to power interconnection for controlling power supply voltage and detecting power supply current.
5. The single event effect testing system of the optical fiber communication module as claimed in claim 1, wherein during the irradiation process, the main control computer reads the stored data of the internal register of the tested optical fiber communication module circularly through the communication board, and compares the read data with the stored data, and counts and displays the logic state upset condition of the stored data in the tested optical fiber communication module, wherein the upset condition comprises the number of upset bits, the address of the upset bits and the upset time.
6. The single event effect test system of an optical fiber communication module as claimed in claim 1, wherein if the main control computer monitors that the power supply current of the pin of the tested optical fiber communication module suddenly increases to 1.5 times of the normal state, the main control computer controls the power supply to pull down the pin voltage of the tested optical fiber communication module, so that the tested optical fiber communication module is in an abnormal function state, and the normal working state can be recovered only by restarting the tested optical fiber communication module after power failure along with the abnormal function, and then the single event latch occurs at this time.
7. The single event effect testing system of an optical fiber communication module of claim 1, wherein the master control computer comprises a temperature monitoring module, a power control module, a bit error rate monitoring module, a current monitoring module, a rollover monitoring module and a latch monitoring module; the power supply control module is used for remotely controlling a power supply and realizing the real-time voltage control of the tested optical fiber communication module; the current monitoring module is used for monitoring and recording the current change of the power supply and is used as an important basis for judging whether latch-up occurs or not; the turnover monitoring module and the latch monitoring module are used for monitoring the working state of the tested optical fiber communication module, observing the test phenomenon of single event effect and recording test data in real time; and the error rate monitoring module monitors the error rate change rule caused by the single event effect according to the error rate counted by the error code meter and the data acquisition computer.
8. The single event effect test method of the optical fiber communication module is characterized in that the single event effect test system of the optical fiber communication module according to claim 1 is adopted, and the method comprises the following steps:
s1, preparation before testing;
s2, setting heavy ion gun parameters;
s3, starting test software, starting irradiation on the optical fiber communication module to be tested, monitoring and recording abnormal phenomena in real time, and recording the start time, the end time, the type of incident heavy ions, the LET energy value, the incident depth in silicon, the total fluence, the fluence rate and other information of the test;
during the irradiation process, the main control computer circularly reads the stored data of the register inside the optical fiber communication module to be measured through the communication board, compares the stored data, counts the logic state overturning condition of the stored data inside the optical fiber communication module to be measured and displays the logic state overturning condition;
monitoring power supply current by a main control computer, and if the power supply current of a pin of the tested optical fiber communication module is suddenly and abruptly increased to 1.5 times of the normal state, controlling a power supply to pull down the pin voltage of the tested optical fiber communication module by the main control computer so that the tested optical fiber communication module is in an abnormal function state, and if the tested optical fiber communication module is restarted to recover the normal working state along with the abnormal function, considering that single event latch occurs at the moment, and increasing the number of single event latch effect by 1; after single event latchup occurs, the heavy ion gun is closed to stop irradiation, the heavy ion gun is opened to perform irradiation after the detected optical fiber communication module is restarted after power failure occurs, and the main control computer monitors the change condition of the power supply current again until the single event latchup effect times reach 3 times or the injection reaches 10 times7ions/cm2；
S4, when the test meets the requirement, the heavy ion gun is closed to stop irradiation, the power-off and power-on of the tested optical fiber communication module are repeated for 5 times, and whether the tested optical fiber communication module is normal in function is detected;
s5, calculating the turnover times and the latch times under the LET energy value;
and S6, changing the LET energy value, returning to the step S2, and performing heavy ion irradiation of the next LET energy value until the irradiation tests under all LET energy values are completed.
9. The single event effect testing method of the optical fiber communication module according to claim 8, wherein in the step S1, the preparing includes performing a capping process on the tested optical fiber communication module; after the cap is opened, the function and performance tests are carried out, so that the tested optical fiber communication module can be kept normal;
fixing the tested optical fiber communication module on a movable target of a vacuum irradiation chamber, ensuring the movement consistency of the tested optical fiber communication module and the movable target, and ensuring that incident heavy ions are irradiated on the surface of a sensitive area of the tested optical fiber communication module and cannot be blocked at any angle;
the whole test system is set up, and the communication of the test system is checked to ensure that all functions are normal;
and setting the IP and time of the error code meter, the main control computer and the monitoring computer to ensure that all the equipment are in the same local area network segment, the time is completely consistent and accurate to seconds, and vacuumizing the vacuum irradiation chamber after all the preparation work is finished.
10. The single event effect testing method of the optical fiber communication module according to claim 8, wherein in the step S2, the LET energy value of the heavy ions of the heavy ion gun is adjusted, a suitable light spot is selected according to the size of the optical fiber communication module to be tested, and the center point of irradiation is calibrated, so as to ensure that the irradiation area meets the test requirements without affecting other devices.
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