CN114465672A

CN114465672A - Testing method and system for radio frequency forwarding system of field emission region of Mars detector

Info

Publication number: CN114465672A
Application number: CN202210044394.5A
Authority: CN
Inventors: 汪栋硕; 王森; 王民建; 朱新波; 徐亮
Original assignee: Shanghai Institute of Satellite Engineering
Current assignee: Shanghai Institute of Satellite Engineering
Priority date: 2022-01-14
Filing date: 2022-01-14
Publication date: 2022-05-10
Anticipated expiration: 2042-01-14
Also published as: CN114465672B; CN117411565A

Abstract

The invention provides a testing method and a system for a radio frequency forwarding system of a field emission area of a Mars probe, comprising the following steps: a calibration preparation step: performing state preparation of a first uplink channel and a first downlink channel on the radio frequency forwarding system; calibrating uplink insertion loss; a downlink insertion loss calibration step; a functional test preparation step: performing state preparation of a second uplink channel and a second downlink channel on the radio frequency forwarding system; an uplink function testing step and a downlink function testing step. Compared with the prior art, the method can fully verify the adaptability of the transmitting field radio frequency forwarding system to the forwarding of the uplink remote control signal and the downlink remote measurement signal of the Mars detector, and ensure that the communication of the uplink remote control signal and the downlink remote measurement signal between the Mars detector positioned on the transmitting tower and the test equipment of the remote test plant on the real transmitting day is smooth.

Description

Testing method and system for radio frequency forwarding system of field emission region of Mars detector

Technical Field

The invention relates to the technical field of spacecraft testing, in particular to a testing method and a testing system for a radio frequency forwarding system of a field emission area of a Mars probe.

Background

The Mars detector transmitting field transmitting area radio frequency forwarding system is an important component of a transmitting field ground support system, and is used for forwarding a Mars detector downlink remote measuring signal on a transmitting tower frame to a Mars detector testing device in a remote testing factory building and forwarding an uplink remote control signal sent by the Mars detector testing device in the remote testing factory building to a Mars detector on the transmitting tower frame, and on the transmitting day of the Mars detector, if the transmitting system of the transmitting field transmitting area radio frequency forwarding system is abnormal or fails in forwarding the uplink remote control signal or the downlink remote measuring signal, the state setting and the remote measuring monitoring of the transmitting day of the Mars detector are influenced, even the transmitting task is interrupted, so that the functional correctness of the transmitting area radio frequency forwarding system of the transmitting field is required to be fully checked before the Mars detector is transmitted, and the adaptability of the transmitting area radio frequency forwarding system to the Mars detector uplink remote control signal and the downlink remote measuring signal is tested, and planning the forwarding scheme of the transmitting day in advance, wherein the forwarding scheme comprises the position of a forwarding antenna, attenuation setting parameters of a forwarding system and the like.

However, the launching state and the uplink and downlink signal characteristics of the spacecraft launched in the launching field of the mars probe have great differences from those of the mars probe, the scheme of the forwarding system and the method for testing the radio frequency forwarding system in the launching area are not suitable for the mars probe, and the mars probe is launched for the first time, and needs to test the radio frequency forwarding system in the launching area of the launching field according to the launching state and the uplink and downlink signal characteristics of the mars probe and design the forwarding scheme.

Patent document CN111516908A discloses a fault diagnosis method suitable for a propulsion system of a mars probe, where the mars probe includes two accelerometers and three sets of gyroscopes, the propulsion system of the mars probe includes a rail-controlled thruster and an attitude-controlled thruster, and the method determines that the rail-controlled thruster is normal according to the measured values of the two accelerometers; and judging the attitude control thruster to be normal by the measured values of the three gyroscopes. However, the method only carries out fault diagnosis on the propulsion system of the Mars probe and does not relate to the function test of the radio frequency forwarding system of the Mars probe.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a testing method and a testing system for a radio frequency forwarding system of a field emission area of a Mars probe.

The invention provides a testing method of a radio frequency forwarding system of a field emission area of a Mars probe, which comprises the following steps:

a calibration preparation step: performing state preparation of a first uplink channel and a first downlink channel on a radio frequency forwarding system;

uplink insertion loss calibration: performing insertion loss calibration on the first uplink channel;

downlink insertion loss calibration: carrying out insertion loss calibration on the first downlink channel;

a functional test preparation step: performing state preparation of a second uplink channel and a second downlink channel on the radio frequency forwarding system;

and an uplink function testing step: carrying out remote control signal forwarding function test on the second uplink channel;

downlink function testing: and carrying out telemetry signal forwarding function test on the second downlink channel.

Preferably, the calibration preparation step comprises:

a first connection substep of the test equipment between the back-end radio frequency forwarding: connecting a first signal generator to an upstream channel inlet of a rear-end radio frequency forwarding cabinet, and connecting a first spectrum analyzer to a downstream channel outlet of the rear-end radio frequency forwarding cabinet;

the first connection substep of the test equipment between the front-end radio frequency forwarding is as follows: connecting an uplink channel outlet of the front-end radio frequency forwarding cabinet to an uplink forwarding transmitting antenna on the fixed tower platform through a radio frequency cable, and connecting a downlink channel inlet of the front-end radio frequency forwarding cabinet to a downlink forwarding receiving antenna on the fixed tower platform through the radio frequency cable;

product on board first connection substep: and placing the surround transmitting antenna and the surround receiving antenna on a rotary platform in the fairing area, connecting the surround transmitting antenna to a second signal generator between front-end radio frequency repeaters through a radio frequency cable, and connecting the surround receiving antenna to a second spectrum analyzer between the front-end radio frequency repeaters through the radio frequency cable.

Preferably, the uplink insertion loss calibration step includes:

step S201: setting a first uplink channel to be in a first master state through control software of a radio frequency forwarding system, wherein the first master state is characterized in that radio frequency signals are forwarded through rear-end uplink master equipment, an optical fiber cable and front-end uplink master equipment, and first attenuation values of adjustable attenuators in the rear-end uplink master equipment and the front-end uplink master equipment are set to be 0;

step S202: a first signal generator in the rear-end radio frequency forwarding room outputs a first single carrier signal, the frequency of the first single carrier signal is equal to the carrier frequency of a receiving signal of a transponder of a mars detector, and a first power value of the first single carrier signal is equal to a middle value of a rear-end uplink main share equipment entrance power range;

step S203: measuring uplink signal power transmitted by a first uplink channel forwarding and uplink forwarding transmitting antenna on a second spectrum analyzer between front-end radio frequency forwarding, receiving the uplink signal power received by the antenna by a surrounding device, recording an uplink signal power value, and obtaining a first insertion loss reference value of the first uplink channel according to the first power value and the uplink signal power value;

step S204: adjusting first attenuation values of adjustable attenuators of the rear-end uplink main share equipment and the front-end uplink main share equipment according to the first insertion loss reference value, measuring uplink signal power on a second spectrum analyzer, enabling the uplink signal power received on the second spectrum analyzer to be equal to a middle value of a dynamic range of a received signal of a responder, and recording the first attenuation values;

step S205: setting the first uplink channel to be in a first backup state through control software of the radio frequency forwarding system, wherein the first backup state is characterized in that radio frequency signals are forwarded through rear-end uplink backup equipment, an optical fiber cable and front-end uplink backup equipment, and second attenuation values of adjustable attenuators in the rear-end uplink backup equipment and the front-end uplink backup equipment are set to be 0;

step S206: and repeatedly executing the steps S202-S204, wherein during repeated execution, the rear-end uplink main backup device in the steps S202-S204 is replaced by a rear-end uplink backup device, the front-end uplink main backup device is replaced by a front-end uplink backup device, and the insertion loss calibration of the first uplink channel of the radio frequency forwarding system is completed.

Preferably, the downlink insertion loss calibration step includes:

step S301: setting the first downlink channel to be in a second master state through radio frequency forwarding system control software, wherein the second master state represents that radio frequency signals are forwarded through front-end downlink master equipment, an optical fiber cable and rear-end downlink master equipment, and setting a third attenuation value of an adjustable attenuator in the front-end downlink master equipment and the rear-end downlink master equipment to be 0;

step S302: the second signal generator outputs a second single-carrier signal, the frequency of the second single-carrier signal is equal to the carrier frequency of a transmitting signal of the responder, and the second power value of the second single-carrier signal is equal to the output signal power value of the downstream channel power amplifier measured and controlled by the Mars detector;

step S303: measuring the downlink signal power transmitted by the transmitting antenna of the surround device on a first spectrum analyzer, received by the downlink forwarding receiving antenna and forwarded by the first downlink channel, recording the power value of the downlink signal, and obtaining a second insertion loss reference value of the first downlink channel according to the second power value and the power value of the downlink signal;

step S304: adjusting a third attenuation value of an adjustable attenuator of the front-end downlink master equipment and the rear-end downlink master equipment according to the second insertion loss reference value, measuring downlink signal power on a first spectrum analyzer between rear-end radio frequency forwarding, enabling the downlink signal power received by the first spectrum analyzer to be equal to a middle value of a dynamic range of a received signal of the Mars probe radio frequency testing equipment, and recording the third attenuation value;

step S305: setting the first downlink channel to be in a second backup state through control software of the radio frequency forwarding system, wherein the second backup state is characterized in that radio frequency signals are forwarded through front-end downlink backup equipment, an optical fiber cable and rear-end downlink backup equipment, and fourth attenuation values of adjustable attenuators in the front-end downlink backup equipment and the rear-end downlink backup equipment are set to be 0;

step S306: and repeatedly executing the steps S302-S304, wherein during repeated execution, the front-end downlink main backup device in the steps S302-S304 is replaced by a front-end downlink backup device, and the rear-end downlink main backup device is replaced by a rear-end downlink backup device, so that the insertion loss calibration of the first downlink channel of the radio frequency forwarding system is completed.

Preferably, the functional test preparing step includes:

a second connection sub-step of the test equipment between the back-end radio frequency forwarding: connecting an uplink remote control transmitting port of the Mars probe radio frequency testing equipment to an uplink channel inlet of the rear-end radio frequency forwarding cabinet, and connecting a downlink remote measuring receiving port of the Mars probe radio frequency testing equipment to a downlink channel outlet of the rear-end radio frequency forwarding cabinet;

the second connection substep of the test equipment between the front-end radio frequency forwarding is as follows: connecting an uplink channel outlet of the front-end radio frequency forwarding cabinet to an uplink forwarding transmitting antenna on the fixed tower platform through a radio frequency cable, and connecting a downlink channel inlet of the front-end radio frequency forwarding cabinet to a downlink forwarding receiving antenna on the fixed tower platform through the radio frequency cable;

a second connection sub-step of on-board products: the method comprises the steps of placing a surrounding device transmitting antenna and a surrounding device receiving antenna on a rotary platform in a fairing area, connecting the surrounding device transmitting antenna to a downlink telemetering signal transmitting port of a power amplifier electric part of a Mars detector between front-end radio frequency forwarding through a radio frequency cable, connecting the surrounding device receiving antenna to an uplink telemetering signal receiving port of a transponder electric part between the front-end radio frequency forwarding through the radio frequency cable, and connecting the transponder electric part, the power amplifier electric part and ground detection equipment.

Preferably, the uplink function testing step includes:

step S501: setting the second uplink channel to be in a third master state, wherein the third master state represents that radio frequency signals are forwarded through the rear-end uplink master device, the optical fiber cable and the front-end uplink master device, and setting a fifth attenuation value of an adjustable attenuator in the rear-end uplink master device and the front-end uplink master device to be a first attenuation value;

step S502: powering up the electric part of the answering machine through the ground detection equipment;

step S503: the Mars detector radio frequency test equipment in the rear-end radio frequency forwarding room outputs an uplink remote control signal, and the third power value of the uplink remote control signal is equal to the middle value of the inlet power range of the rear-end uplink master device;

step S504: monitoring the working state of the responder through the ground detection equipment, confirming that the responder transmits to the second uplink channel forwarding and uplink forwarding transmitting antenna, and receiving and locking the uplink remote control signal received by the receiving antenna of the surround device are normal;

step S505: the Mars detector radio frequency test equipment continuously sends a first remote control instruction frame with fixed data content for multiple times, receives a second remote control instruction frame which is received and demodulated from an uplink remote control signal by a responder through the ground detection equipment, carries out error code detection on the data content of a remote control instruction corresponding to the second remote control instruction frame, and confirms that the data content of the received remote control instruction has no error code;

step S506: setting the second uplink channel to be in a third backup state through control software of the radio frequency forwarding system, wherein the third backup state is characterized in that radio frequency signals are forwarded through rear-end uplink backup equipment, an optical fiber cable and front-end uplink backup equipment, and setting a sixth attenuation value of an adjustable attenuator in the rear-end uplink backup equipment and the front-end uplink backup equipment to be a second attenuation value;

step S507: and repeatedly executing the steps S502-S505, wherein the front-end uplink main sub-equipment in the steps S502-S505 is replaced by front-end uplink backup equipment, and the rear-end uplink main sub-equipment is replaced by rear-end uplink backup equipment, so that the forwarding function test of the second uplink channel of the radio frequency forwarding system is completed.

Preferably, the downlink functional test step includes:

step S601: setting the second downlink channel to be in a fourth master state through control software of the radio frequency forwarding system, wherein the fourth master state is characterized in that radio frequency signals are forwarded through the front-end downlink master equipment, the optical fiber cable and the rear-end downlink master equipment, and setting a seventh attenuation value of an adjustable attenuator in the front-end downlink master equipment and the rear-end downlink master equipment to be a third attenuation value;

step S602: powering up the responder electrical part and the power amplifier electrical part through the ground detection equipment, setting a downlink transmitting port of the responder electrical part, and outputting a downlink telemetering signal through the power amplifier electrical part;

step S603: monitoring the receiving state of the downlink telemetering signals on the Mars detector radio frequency testing equipment, and confirming that the receiving and locking of the downlink telemetering signals by the Mars detector radio frequency testing equipment are normal;

step S604: continuously outputting a first telemetering frame with fixed data content through the ground detection equipment, and modulating and outputting the first telemetering frame through the transponder electrical part;

step S605: receiving a telemetering signal corresponding to the first telemetering frame and demodulating telemetering data by using the Mars detector radio frequency test equipment, carrying out error code detection on the telemetering data, and confirming that the received telemetering data has no error code;

step S606: setting the second downlink channel to be in a fourth backup state through control software of the radio frequency forwarding system, wherein the fourth backup state is characterized in that radio frequency signals are forwarded through front-end downlink backup equipment, an optical fiber cable and rear-end downlink backup equipment, and eighth attenuation values of adjustable attenuators in the front-end downlink backup equipment and the rear-end downlink backup equipment are set to be fourth attenuation values;

step S607: and repeatedly executing the steps S602-S605, wherein during repeated execution, the front-end uplink main sub-equipment in the steps S602-S605 is replaced by front-end uplink backup equipment, and the rear-end uplink main sub-equipment is replaced by rear-end uplink backup equipment, so that the forwarding function test of the second downlink channel telemetry signal of the radio frequency forwarding system is completed.

Preferably, step S505 includes:

and presetting a third remote control instruction frame which is consistent with the data content of the first remote control instruction frame sent by the Mars detector radio frequency test equipment as a comparison standard, and carrying out bit-by-bit consistency comparison on each second remote control instruction frame and the third remote control instruction frame.

Preferably, step S605 includes: presetting a second telemetry frame which is consistent with the data content of the first telemetry frame sent by the ground detection equipment as a comparison reference, and carrying out bit-by-bit consistency comparison on each third telemetry frame demodulated from the telemetry signal forwarded by the radio frequency forwarding system and the second telemetry frame which is taken as the comparison reference.

The invention provides a testing system of a radio frequency forwarding system of a Mars detector transmitting field transmitting area, which comprises:

a calibration preparation module: performing state preparation of a first uplink channel and a first downlink channel on a radio frequency forwarding system;

an uplink insertion loss calibration module: performing insertion loss calibration on the first uplink channel;

a downlink insertion loss calibration module: carrying out insertion loss calibration on the first downlink channel;

a functional test preparation module: performing state preparation of a second uplink channel and a second downlink channel on the radio frequency forwarding system;

the uplink function testing module: carrying out remote control signal forwarding function test on the second uplink channel;

the downlink function testing module: and carrying out telemetry signal forwarding function test on the second downlink channel.

Preferably, the calibration preparation module comprises:

the first connection submodule of the test equipment between the back end radio frequency forwarding: connecting a first signal generator to an upstream channel inlet of a rear-end radio frequency forwarding cabinet, and connecting a first spectrum analyzer to a downstream channel outlet of the rear-end radio frequency forwarding cabinet;

the first connection submodule of the test equipment between the front-end radio frequency forwarding: connecting an uplink channel outlet of the front-end radio frequency forwarding cabinet to an uplink forwarding transmitting antenna on the fixed tower platform through a radio frequency cable, and connecting a downlink channel inlet of the front-end radio frequency forwarding cabinet to a downlink forwarding receiving antenna on the fixed tower platform through the radio frequency cable;

product on board first connection submodule: and placing the surround transmitting antenna and the surround receiving antenna on a rotary platform in the fairing area, connecting the surround transmitting antenna to a second signal generator between front-end radio frequency repeaters through a radio frequency cable, and connecting the surround receiving antenna to a second spectrum analyzer between the front-end radio frequency repeaters through the radio frequency cable.

Preferably, the uplink insertion loss calibration module includes:

submodule M201: setting a first uplink channel to be in a first master state through control software of a radio frequency forwarding system, wherein the first master state is characterized in that radio frequency signals are forwarded through rear-end uplink master equipment, an optical fiber cable and front-end uplink master equipment, and first attenuation values of adjustable attenuators in the rear-end uplink master equipment and the front-end uplink master equipment are set to be 0;

submodule M202: a first signal generator in the rear-end radio frequency forwarding room outputs a first single carrier signal, the frequency of the first single carrier signal is equal to the carrier frequency of a receiving signal of a transponder of a mars detector, and a first power value of the first single carrier signal is equal to a middle value of a rear-end uplink main share equipment entrance power range;

submodule M203: measuring uplink signal power transmitted by a first uplink channel forwarding and uplink forwarding transmitting antenna on a second spectrum analyzer between front-end radio frequency forwarding, receiving the uplink signal power received by the antenna by a surrounding device, recording an uplink signal power value, and obtaining a first insertion loss reference value of the first uplink channel according to the first power value and the uplink signal power value;

submodule M204: adjusting first attenuation values of adjustable attenuators of the rear-end uplink main share equipment and the front-end uplink main share equipment according to the first insertion loss reference value, measuring uplink signal power on a second spectrum analyzer, enabling the uplink signal power received on the second spectrum analyzer to be equal to a middle value of a dynamic range of a received signal of a responder, and recording the first attenuation values;

submodule M205: setting the first uplink channel to be in a first backup state through control software of the radio frequency forwarding system, wherein the first backup state is characterized in that radio frequency signals are forwarded through rear-end uplink backup equipment, an optical fiber cable and front-end uplink backup equipment, and second attenuation values of adjustable attenuators in the rear-end uplink backup equipment and the front-end uplink backup equipment are set to be 0;

submodule M206: and repeatedly executing the steps S202-S204, wherein during repeated execution, the rear-end uplink main backup device in the steps S202-S204 is replaced by a rear-end uplink backup device, the front-end uplink main backup device is replaced by a front-end uplink backup device, and the insertion loss calibration of the first uplink channel of the radio frequency forwarding system is completed.

Preferably, the downlink insertion loss calibration module includes:

submodule M301: setting the first downlink channel to be in a second master state through radio frequency forwarding system control software, wherein the second master state represents that radio frequency signals are forwarded through front-end downlink master equipment, an optical fiber cable and rear-end downlink master equipment, and setting a third attenuation value of an adjustable attenuator in the front-end downlink master equipment and the rear-end downlink master equipment to be 0;

submodule M302: the second signal generator outputs a second single-carrier signal, the frequency of the second single-carrier signal is equal to the carrier frequency of a transmitting signal of the responder, and the second power value of the second single-carrier signal is equal to the output signal power value of the downstream channel power amplifier measured and controlled by the Mars detector;

submodule M303: measuring the downlink signal power transmitted by the transmitting antenna of the surround device on a first spectrum analyzer, received by the downlink forwarding receiving antenna and forwarded by the first downlink channel, recording the power value of the downlink signal, and obtaining a second insertion loss reference value of the first downlink channel according to the second power value and the power value of the downlink signal;

submodule M304: adjusting a third attenuation value of an adjustable attenuator of the front-end downlink master equipment and the rear-end downlink master equipment according to the second insertion loss reference value, measuring downlink signal power on a first spectrum analyzer between rear-end radio frequency forwarding, enabling the downlink signal power received by the first spectrum analyzer to be equal to a middle value of a dynamic range of a received signal of the Mars probe radio frequency testing equipment, and recording the third attenuation value;

submodule M305: setting the first downlink channel to be in a second backup state through control software of the radio frequency forwarding system, wherein the second backup state is characterized in that radio frequency signals are forwarded through front-end downlink backup equipment, an optical fiber cable and rear-end downlink backup equipment, and fourth attenuation values of adjustable attenuators in the front-end downlink backup equipment and the rear-end downlink backup equipment are set to be 0;

submodule M306: and repeatedly executing the steps S302-S304, wherein during repeated execution, the front-end downlink main backup device in the steps S302-S304 is replaced by a front-end downlink backup device, and the rear-end downlink main backup device is replaced by a rear-end downlink backup device, so that the insertion loss calibration of the first downlink channel of the radio frequency forwarding system is completed.

Preferably, the functional test preparation module comprises:

the second connection sub-module of the test equipment between the rear end radio frequency forwarding: connecting an uplink remote control transmitting port of the Mars probe radio frequency testing equipment to an uplink channel inlet of the rear-end radio frequency forwarding cabinet, and connecting a downlink remote measuring receiving port of the Mars probe radio frequency testing equipment to a downlink channel outlet of the rear-end radio frequency forwarding cabinet;

the second connection sub-module of the test equipment between the front-end radio frequency forwarding: connecting an uplink channel outlet of the front-end radio frequency forwarding cabinet to an uplink forwarding transmitting antenna on the fixed tower platform through a radio frequency cable, and connecting a downlink channel inlet of the front-end radio frequency forwarding cabinet to a downlink forwarding receiving antenna on the fixed tower platform through the radio frequency cable;

product second connection submodule on the ware: the method comprises the steps of placing a surrounding device transmitting antenna and a surrounding device receiving antenna on a rotary platform in a fairing area, connecting the surrounding device transmitting antenna to a downlink telemetering signal transmitting port of a power amplifier electric part of a Mars detector between front-end radio frequency forwarding through a radio frequency cable, connecting the surrounding device receiving antenna to an uplink telemetering signal receiving port of a transponder electric part between the front-end radio frequency forwarding through the radio frequency cable, and connecting the transponder electric part, the power amplifier electric part and ground detection equipment.

Preferably, the uplink function testing module includes:

submodule M501: setting the second uplink channel to be in a third master state, wherein the third master state represents that radio frequency signals are forwarded through the rear-end uplink master device, the optical fiber cable and the front-end uplink master device, and setting a fifth attenuation value of an adjustable attenuator in the rear-end uplink master device and the front-end uplink master device to be a first attenuation value;

submodule M502: powering up the electric part of the answering machine through the ground detection equipment;

submodule M503: the Mars detector radio frequency test equipment in the rear-end radio frequency forwarding room outputs an uplink remote control signal, and the third power value of the uplink remote control signal is equal to the middle value of the inlet power range of the rear-end uplink master device;

submodule M504: monitoring the working state of the responder through the ground detection equipment, confirming that the responder transmits to the second uplink channel forwarding and uplink forwarding transmitting antenna, and receiving and locking the uplink remote control signal received by the receiving antenna of the surround device are normal;

submodule M505: the Mars detector radio frequency test equipment continuously sends a first remote control instruction frame with fixed data content for multiple times, receives a second remote control instruction frame which is received and demodulated from an uplink remote control signal by a responder through the ground detection equipment, carries out error code detection on the data content of a remote control instruction corresponding to the second remote control instruction frame, and confirms that the data content of the received remote control instruction has no error code;

submodule M506: setting the second uplink channel to be in a third backup state through control software of the radio frequency forwarding system, wherein the third backup state is characterized in that radio frequency signals are forwarded through rear-end uplink backup equipment, an optical fiber cable and front-end uplink backup equipment, and setting a sixth attenuation value of an adjustable attenuator in the rear-end uplink backup equipment and the front-end uplink backup equipment to be a second attenuation value;

submodule M507: and repeatedly executing the steps S502-S505, wherein the front-end uplink main sub-equipment in the steps S502-S505 is replaced by front-end uplink backup equipment, and the rear-end uplink main sub-equipment is replaced by rear-end uplink backup equipment, so that the forwarding function test of the second uplink channel of the radio frequency forwarding system is completed.

Preferably, the downlink functional test module includes:

submodule M601: setting the second downlink channel to be in a fourth master state through control software of the radio frequency forwarding system, wherein the fourth master state is characterized in that radio frequency signals are forwarded through the front-end downlink master equipment, the optical fiber cable and the rear-end downlink master equipment, and setting a seventh attenuation value of an adjustable attenuator in the front-end downlink master equipment and the rear-end downlink master equipment to be a third attenuation value;

submodule M602: powering up the responder electrical part and the power amplifier electrical part through the ground detection equipment, setting a downlink transmitting port of the responder electrical part, and outputting a downlink telemetering signal through the power amplifier electrical part;

submodule MS 603: monitoring the receiving state of the downlink telemetering signals on the Mars detector radio frequency testing equipment, and confirming that the receiving and locking of the downlink telemetering signals by the Mars detector radio frequency testing equipment are normal;

submodule M604: continuously outputting a first telemetering frame with fixed data content through the ground detection equipment, and modulating and outputting the first telemetering frame through the transponder electrical part;

submodule M605: receiving a telemetering signal corresponding to the first telemetering frame and demodulating telemetering data by using the Mars detector radio frequency test equipment, carrying out error code detection on the telemetering data, and confirming that the received telemetering data has no error code;

submodule M606: setting the second downlink channel to be in a fourth backup state through control software of the radio frequency forwarding system, wherein the fourth backup state is characterized in that radio frequency signals are forwarded through front-end downlink backup equipment, an optical fiber cable and rear-end downlink backup equipment, and eighth attenuation values of adjustable attenuators in the front-end downlink backup equipment and the rear-end downlink backup equipment are set to be fourth attenuation values;

submodule M607: and repeatedly executing the steps S602-S605, wherein during repeated execution, the front-end uplink main sub-equipment in the steps S602-S605 is replaced by front-end uplink backup equipment, and the rear-end uplink main sub-equipment is replaced by rear-end uplink backup equipment, so that the forwarding function test of the second downlink channel telemetry signal of the radio frequency forwarding system is completed.

Preferably, the submodule M505 includes:

Preferably, the sub-module M605 includes:

presetting a second telemetry frame which is consistent with the data content of the first telemetry frame sent by the ground detection equipment as a comparison reference, and carrying out bit-by-bit consistency comparison on each third telemetry frame demodulated from the telemetry signal forwarded by the radio frequency forwarding system and the second telemetry frame which is taken as the comparison reference.

Compared with the prior art, the invention has the following beneficial effects:

1. the invention can test the functions of carrying out insertion loss calibration and radio frequency signal forwarding on the uplink main backup channel and the downlink main backup channel of the radio frequency forwarding system of the transmitting field transmitting area before the Mars detector transmits, and fully verifies the adaptability of the transmitting field radio frequency forwarding system to the remote control signal and the remote control signal forwarding of the Mars detector.

2. The functional test of the invention can simulate the antenna position, the uplink and downlink signal states and the forwarding antenna layout of the Mars detector on the real transmitting day, and the test result can provide guidance for the forwarding scheme on the real transmitting day, including the attenuation setting of the downlink channel of the uplink channel of the radio frequency forwarding system on the real transmitting day, the position arrangement of the uplink forwarding transmitting antenna and the downlink forwarding receiving antenna, and the like, thereby ensuring smooth communication of remote control signals and remote measurement signals between the Mars detector positioned on the transmitting tower and the testing equipment of the remote testing factory building on the real transmitting day.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic flow diagram of the present invention;

FIG. 2 is a schematic diagram of the insertion loss calibration structure of the present invention;

FIG. 3 is a schematic diagram of a testable configuration of the present invention.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will aid those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any manner. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.

Fig. 1 is a schematic flowchart of the present invention, and as shown in fig. 1, the present invention provides a method for testing a radio frequency forwarding system of a field emission area of a mars probe, including:

a calibration preparation step: and performing state preparation of the first uplink channel and the first downlink channel on the radio frequency forwarding system.

Preferably, the calibration preparation step comprises: a first connection substep of the test equipment between the back-end radio frequency forwarding: connecting a first signal generator to an upstream channel inlet of a rear-end radio frequency forwarding cabinet, and connecting a first spectrum analyzer to a downstream channel outlet of the rear-end radio frequency forwarding cabinet; the first connection substep of the test equipment between the front-end radio frequency forwarding is as follows: connecting an uplink channel outlet of the front-end radio frequency forwarding cabinet to an uplink forwarding transmitting antenna on the fixed tower platform through a radio frequency cable, and connecting a downlink channel inlet of the front-end radio frequency forwarding cabinet to a downlink forwarding receiving antenna on the fixed tower platform through the radio frequency cable; product on board first connection substep: and placing the surround transmitting antenna and the surround receiving antenna on a rotary platform in the fairing area, connecting the surround transmitting antenna to a second signal generator between front-end radio frequency repeaters through a radio frequency cable, and connecting the surround receiving antenna to a second spectrum analyzer between the front-end radio frequency repeaters through the radio frequency cable.

The type of the first signal generator is not limited in the present invention, and may be, for example, an E8267D signal generator by deluxe (Keysight).

The type of the first spectrum analyzer is not limited in the present invention, and may be, for example, a 9030A type spectrum analyzer of the germany corporation (Keysight).

Specifically, fig. 2 is a schematic structural diagram of the insertion loss calibration of the present invention, as shown in fig. 2, including connecting a first signal generator to an upstream channel inlet of a back-end radio frequency repeater cabinet, and connecting a first spectrum analyzer to a downstream channel outlet of the back-end radio frequency repeater cabinet; connecting an uplink channel outlet of the front-end radio frequency forwarding cabinet to an uplink forwarding transmitting antenna on the fixed tower platform through a radio frequency cable, and connecting a downlink channel inlet of the front-end radio frequency forwarding cabinet to a downlink forwarding receiving antenna on the fixed tower platform through the radio frequency cable; and placing the surround transmitting antenna and the surround receiving antenna on a rotary platform in the fairing area, connecting the surround transmitting antenna to a second signal generator between front-end radio frequency repeaters through a radio frequency cable, and connecting the surround receiving antenna to a second spectrum analyzer between the front-end radio frequency repeaters through the radio frequency cable.

Uplink insertion loss calibration: and carrying out insertion loss calibration on the first uplink channel.

Preferably, the uplink insertion loss calibration step includes: step S201: setting a first uplink channel to be in a first master state through control software of a radio frequency forwarding system, wherein the first master state is characterized in that radio frequency signals are forwarded through rear-end uplink master equipment, an optical fiber cable and front-end uplink master equipment, and first attenuation values of adjustable attenuators in the rear-end uplink master equipment and the front-end uplink master equipment are set to be 0; step S202: a first signal generator in the rear-end radio frequency forwarding room outputs a first single carrier signal, the frequency of the first single carrier signal is equal to the carrier frequency of a receiving signal of a transponder of a mars detector, and a first power value of the first single carrier signal is equal to a middle value of a rear-end uplink main share equipment entrance power range; step S203: measuring uplink signal power transmitted by a first uplink channel forwarding and uplink forwarding transmitting antenna on a second spectrum analyzer between front-end radio frequency forwarding, receiving the uplink signal power received by an antenna by a surround device, recording an uplink signal power value, and obtaining a first insertion loss reference value of a first uplink channel according to the first power value and the uplink signal power value; step S204: adjusting first attenuation values of adjustable attenuators of the rear-end uplink main share equipment and the front-end uplink main share equipment according to the first insertion loss reference value, measuring uplink signal power on a second spectrum analyzer, enabling the uplink signal power received on the second spectrum analyzer to be equal to a middle value of a dynamic range of a received signal of a responder, and recording the first attenuation values; step S205: setting the first uplink channel to be in a first backup state through control software of the radio frequency forwarding system, wherein the first backup state is characterized in that radio frequency signals are forwarded through rear-end uplink backup equipment, an optical fiber cable and front-end uplink backup equipment, and second attenuation values of adjustable attenuators in the rear-end uplink backup equipment and the front-end uplink backup equipment are set to be 0; step S206: and repeatedly executing the steps S202-S204, wherein during repeated execution, the rear-end uplink main backup device in the steps S202-S204 is replaced by a rear-end uplink backup device, the front-end uplink main backup device is replaced by a front-end uplink backup device, and the insertion loss calibration of the first uplink channel of the radio frequency forwarding system is completed.

Specifically, the first insertion loss reference value is a difference between the first power value and the uplink signal power value.

It should be noted that the first insertion loss reference value may instruct to perform actual transmission later, and for example, during actual transmission, the power value of the signal output by the first signal generator or the power value measured by the second spectrum analyzer may be calculated according to the first insertion loss reference value.

Downlink insertion loss calibration: and carrying out insertion loss calibration on the first downlink channel.

Preferably, the downlink insertion loss calibration step includes: step S301: setting the first downlink channel to be in a second master state through radio frequency forwarding system control software, wherein the second master state represents that radio frequency signals are forwarded through front-end downlink master equipment, an optical fiber cable and rear-end downlink master equipment, and setting a third attenuation value of an adjustable attenuator in the front-end downlink master equipment and the rear-end downlink master equipment to be 0; step S302: the second signal generator outputs a second single-carrier signal, the frequency of the second single-carrier signal is equal to the carrier frequency of a transmitting signal of the responder, and the second power value of the second single-carrier signal is equal to the output signal power value of the downstream channel power amplifier measured and controlled by the Mars detector; step S303: measuring the power of a downlink signal transmitted by a transmitting antenna of the surround device on a first spectrum analyzer, received by a downlink forwarding receiving antenna and forwarded by a first downlink channel, recording the power value of the downlink signal, and obtaining a second insertion loss reference value of the first downlink channel according to the second power value and the power value of the downlink signal; step S304: adjusting a third attenuation value of an adjustable attenuator of the front-end downlink master equipment and the rear-end downlink master equipment according to the second insertion loss value, measuring downlink signal power on a first spectrum analyzer between rear-end radio frequency forwarding, enabling the downlink signal power received by the first spectrum analyzer to be equal to a middle value of a dynamic range of a received signal of the Mars probe radio frequency testing equipment, and recording the third attenuation value; step S305: setting the first downlink channel to be in a second backup state through control software of the radio frequency forwarding system, wherein the second backup state is characterized in that radio frequency signals are forwarded through front-end downlink backup equipment, an optical fiber cable and rear-end downlink backup equipment, and fourth attenuation values of adjustable attenuators in the front-end downlink backup equipment and the rear-end downlink backup equipment are set to be 0; step S306: and repeatedly executing the steps S302-S304, wherein during repeated execution, the front-end downlink main backup device in the steps S302-S304 is replaced by a front-end downlink backup device, and the rear-end downlink main backup device is replaced by a rear-end downlink backup device, so that the insertion loss calibration of the first downlink channel of the radio frequency forwarding system is completed.

Specifically, the second insertion loss reference value is a difference between the second power value and the downlink signal power value.

It should be noted that the second insertion loss reference value may be used to guide subsequent actual transmission, and for example, during actual transmission, the power value of the signal output by the second signal generator or the power value measured by the first spectrum analyzer may be calculated according to the second insertion loss reference value.

A functional test preparation step: and performing state preparation of a second uplink channel and a second downlink channel on the radio frequency forwarding system.

Preferably, the functional test preparing step includes: a second connection sub-step of the test equipment between the back-end radio frequency forwarding: connecting an uplink remote control transmitting port of the Mars probe radio frequency testing equipment to an uplink channel inlet of the rear-end radio frequency forwarding cabinet, and connecting a downlink remote measuring receiving port of the Mars probe radio frequency testing equipment to a downlink channel outlet of the rear-end radio frequency forwarding cabinet; the second connection substep of the test equipment between the front-end radio frequency forwarding is as follows: connecting an uplink channel outlet of the front-end radio frequency forwarding cabinet to an uplink forwarding transmitting antenna on the fixed tower platform through a radio frequency cable, and connecting a downlink channel inlet of the front-end radio frequency forwarding cabinet to a downlink forwarding receiving antenna on the fixed tower platform through the radio frequency cable; a second connection sub-step of on-board products: the method comprises the steps of placing a surrounding device transmitting antenna and a surrounding device receiving antenna on a rotary platform in a fairing area, connecting the surrounding device transmitting antenna to a downlink telemetering signal transmitting port of a power amplifier electric part of a Mars detector between front-end radio frequency forwarding through a radio frequency cable, connecting the surrounding device receiving antenna to an uplink telemetering signal receiving port of a transponder electric part between the front-end radio frequency forwarding through the radio frequency cable, and connecting the transponder electric part, the power amplifier electric part and ground detection equipment.

Specifically, fig. 3 is a schematic structural diagram of the testable structure of the present invention, and as shown in fig. 3, an uplink remote control transmitting port of the mars probe radio frequency test device is connected to an uplink channel inlet of the rear-end radio frequency forwarding cabinet, and a downlink remote measurement receiving port of the mars probe radio frequency test device is connected to a downlink channel outlet of the rear-end radio frequency forwarding cabinet; connecting an uplink channel outlet of the front-end radio frequency forwarding cabinet to an uplink forwarding transmitting antenna on the fixed tower platform through a radio frequency cable, and connecting a downlink channel inlet of the front-end radio frequency forwarding cabinet to a downlink forwarding receiving antenna on the fixed tower platform through the radio frequency cable; the method comprises the steps of placing an encirclement device transmitting antenna and an encirclement device receiving antenna on a rotary platform in a fairing area, connecting a Mars detector transmitting antenna to a downlink telemetering signal transmitting port of a Mars detector power amplifier electric component between front-end radio frequency forwarding through a radio frequency cable, connecting a Mars detector receiving antenna to an uplink remote control signal receiving port of a Mars detector transponder electric component between front-end radio frequency forwarding through a radio frequency cable, and connecting the Mars detector transponder electric component, the power amplifier electric component and ground detection equipment between front-end radio frequency forwarding.

And an uplink function testing step: and carrying out remote control signal forwarding function test on the second uplink channel.

Preferably, the uplink function testing step includes: step S501: setting the second uplink channel to be in a third master state, wherein the third master state represents that radio frequency signals are forwarded through the rear-end uplink master device, the optical fiber cable and the front-end uplink master device, and setting a fifth attenuation value of an adjustable attenuator in the rear-end uplink master device and the front-end uplink master device to be a first attenuation value; step S502: powering up the electric part of the answering machine through the ground detection equipment; step S503: the Mars detector radio frequency test equipment in the rear-end radio frequency forwarding room outputs an uplink remote control signal, and the third power value of the uplink remote control signal is equal to the middle value of the inlet power range of the rear-end uplink master device; step S504: monitoring the working state of the responder through the ground detection equipment, confirming that the responder transmits to the second uplink channel forwarding and uplink forwarding transmitting antenna, and receiving and locking the uplink remote control signal received by the receiving antenna of the surround device are normal; step S505: the Mars detector radio frequency test equipment continuously sends a first remote control instruction frame with fixed data content for multiple times, receives a second remote control instruction frame which is received and demodulated from an uplink remote control signal by a responder through the ground detection equipment, carries out error code detection on the data content of a remote control instruction corresponding to the second remote control instruction frame, and confirms that the data content of the received remote control instruction has no error code; step S506: setting the second uplink channel to be in a third backup state through control software of the radio frequency forwarding system, wherein the third backup state is characterized in that radio frequency signals are forwarded through rear-end uplink backup equipment, an optical fiber cable and front-end uplink backup equipment, and setting a sixth attenuation value of an adjustable attenuator in the rear-end uplink backup equipment and the front-end uplink backup equipment to be a second attenuation value; step S507: and repeatedly executing the steps S502-S505, wherein the front-end uplink main sub-equipment in the steps S502-S505 is replaced by front-end uplink backup equipment, and the rear-end uplink main sub-equipment is replaced by rear-end uplink backup equipment, so that the forwarding function test of the second uplink channel of the radio frequency forwarding system is completed.

Preferably, step S505 includes: and presetting a third remote control instruction frame which is consistent with the data content of the first remote control instruction frame sent by the Mars detector radio frequency test equipment as a comparison standard, and carrying out bit-by-bit consistency comparison on each second remote control instruction frame and the third remote control instruction frame.

Preferably, the downlink functional test step includes: step S601: setting the second downlink channel to be in a fourth master state through control software of the radio frequency forwarding system, wherein the fourth master state is characterized in that radio frequency signals are forwarded through the front-end downlink master equipment, the optical fiber cable and the rear-end downlink master equipment, and setting a seventh attenuation value of an adjustable attenuator in the front-end downlink master equipment and the rear-end downlink master equipment to be a third attenuation value; step S602: powering up the responder electrical part and the power amplifier electrical part through the ground detection equipment, setting a downlink transmitting port of the responder electrical part, and outputting a downlink telemetering signal through the power amplifier electrical part; step S603: monitoring the receiving state of the downlink telemetering signals on the Mars detector radio frequency testing equipment, and confirming that the receiving and locking of the downlink telemetering signals by the Mars detector radio frequency testing equipment are normal; step S604: continuously outputting a first telemetering frame with fixed data content through the ground detection equipment, and modulating and outputting the first telemetering frame through the transponder electrical part; step S605: receiving a telemetering signal corresponding to the first telemetering frame and demodulating telemetering data by using the Mars detector radio frequency test equipment, carrying out error code detection on the telemetering data, and confirming that the received telemetering data has no error code; step S606: setting the second downlink channel to be in a fourth backup state through control software of the radio frequency forwarding system, wherein the fourth backup state is characterized in that radio frequency signals are forwarded through front-end downlink backup equipment, an optical fiber cable and rear-end downlink backup equipment, and eighth attenuation values of adjustable attenuators in the front-end downlink backup equipment and the rear-end downlink backup equipment are set to be fourth attenuation values; step S607: and repeatedly executing the steps S602-S605, wherein during repeated execution, the front-end uplink main sub-equipment in the steps S602-S605 is replaced by front-end uplink backup equipment, and the rear-end uplink main sub-equipment is replaced by rear-end uplink backup equipment, so that the forwarding function test of the second downlink channel telemetry signal of the radio frequency forwarding system is completed.

It is required to know that the transmitting antenna and the receiving antenna of the surround are both the initial sample certificate verification antennas, and the technical indexes are consistent with those of the normal sample antenna of the Mars detector; when the antenna is placed on the rotary platform, the antenna support supports the antenna, so that the spatial position and the direction of the transmitting antenna and the receiving antenna of the surround are consistent with the spatial position and the antenna direction of the normal antenna when the Mars probe is placed in the fairing during real transmission, and the states of transmitting a telemetering signal by the transmitting antenna of the surround and receiving a remote control signal by the receiving antenna of the surround during the real transmission are simulated.

Wherein the technical index comprises at least one of the following: polarization, operating band, antenna gain, beam width.

Specifically, the ground detection equipment is connected with the transponder electrical part and the power amplifier electrical part through the low-frequency cable, provides power for the work of the transponder electrical part and the power amplifier electrical part, controls the operation and monitors the operation state of the transponder electrical part and the power amplifier electrical part, and simulates a mars detector integrated electronic computer to send service remote measurement data to the transponder and receive uplink remote control instruction data demodulated by the transponder.

a calibration preparation module: and performing state preparation of the first uplink channel and the first downlink channel on the radio frequency forwarding system.

Preferably, the calibration preparation module comprises:

the first connection submodule of the test equipment between the back end radio frequency forwarding: and connecting the first signal generator to an upstream channel inlet of the rear-end radio frequency forwarding cabinet, and connecting the first spectrum analyzer to a downstream channel outlet of the rear-end radio frequency forwarding cabinet.

The first connection submodule of the test equipment between the front-end radio frequency forwarding: and an uplink channel outlet of the front-end radio frequency forwarding cabinet is connected to an uplink forwarding transmitting antenna on the fixed tower platform through a radio frequency cable, and a downlink channel inlet of the front-end radio frequency forwarding cabinet is connected to a downlink forwarding receiving antenna on the fixed tower platform through a radio frequency cable.

An uplink insertion loss calibration module: and carrying out insertion loss calibration on the first uplink channel.

Preferably, the uplink insertion loss calibration module includes:

submodule M201: the first uplink channel is set to be in a first master state through control software of the radio frequency forwarding system, the first master state is characterized in that radio frequency signals are forwarded through the rear-end uplink master device, the optical fiber cable and the front-end uplink master device, and a first attenuation value of an adjustable attenuator in the rear-end uplink master device and the front-end uplink master device is set to be 0.

Submodule M202: and a first signal generator in the rear-end radio frequency forwarding room outputs a first single carrier signal, the frequency of the first single carrier signal is equal to the carrier frequency of a receiving signal of a transponder of the Mars detector, and the first power value of the first single carrier signal is equal to the middle value of the entry power range of the rear-end uplink main share equipment.

Submodule M203: and measuring the uplink signal power transmitted by the first uplink channel forwarding and uplink forwarding transmitting antenna on a second spectrum analyzer between the front-end radio frequency forwarding, receiving the uplink signal power received by the antenna by the surround device, recording the uplink signal power value, and obtaining a first insertion loss reference value of the first uplink channel according to the first power value and the uplink signal power value.

Submodule M204: and adjusting first attenuation values of the adjustable attenuators of the back-end uplink main share equipment and the front-end uplink main share equipment according to the first insertion loss reference value, measuring uplink signal power on a second spectrum analyzer, enabling the uplink signal power received on the second spectrum analyzer to be equal to the middle value of the dynamic range of the received signal of the responder, and recording the first attenuation values.

Sub-module M205: the first uplink channel is set to be in a first backup state through control software of the radio frequency forwarding system, the first backup state is characterized in that radio frequency signals are forwarded through rear-end uplink backup equipment, an optical fiber cable and front-end uplink backup equipment, and second attenuation values of adjustable attenuators in the rear-end uplink backup equipment and the front-end uplink backup equipment are set to be 0.

Submodule M206: and repeatedly executing the steps S202-S204, wherein in the repeated execution, the rear-end uplink main backup device in the steps S202-S204 is replaced by a rear-end uplink backup device, and the front-end uplink main backup device is replaced by a front-end uplink backup device, so that the insertion loss calibration of the first uplink channel of the radio frequency forwarding system is completed.

A downlink insertion loss calibration module: and carrying out insertion loss calibration on the first downlink channel.

Preferably, the downlink insertion loss calibration module includes:

submodule M301: and setting the first downlink channel to be in a second master state through the radio frequency forwarding system control software, wherein the second master state represents that radio frequency signals are forwarded through the front-end downlink master equipment, the optical fiber cable and the rear-end downlink master equipment, and setting a third attenuation value of an adjustable attenuator in the front-end downlink master equipment and the rear-end downlink master equipment to be 0.

Submodule M302: the second signal generator outputs a second single-carrier signal, the frequency of the second single-carrier signal is equal to the carrier frequency of a transmitting signal of the responder, and the second power value of the second single-carrier signal is equal to the output signal power value of the downstream channel power amplifier measured and controlled by the Mars detector.

Submodule M303: and measuring the power of the downlink signal transmitted by the transmitting antenna of the surround device on a first spectrum analyzer, receiving the power of the downlink signal retransmitted by the first downlink channel by the downlink retransmission receiving antenna, recording the power value of the downlink signal, and obtaining a second insertion loss reference value of the first downlink channel according to the second power value and the power value of the downlink signal.

Submodule M304: and adjusting a third attenuation value of an adjustable attenuator of the front-end downlink master equipment and the rear-end downlink master equipment according to the second insertion loss reference value, measuring the power of a downlink signal on a first spectrum analyzer between the rear-end radio frequency forwarding, enabling the power of the downlink signal received by the first spectrum analyzer to be equal to the middle value of the dynamic range of the received signal of the Mars probe radio frequency testing equipment, and recording the third attenuation value.

Submodule M305: and setting the first downlink channel to be in a second backup state through control software of the radio frequency forwarding system, wherein the second backup state is characterized in that radio frequency signals are forwarded through the front-end downlink backup device, the optical fiber cable and the rear-end downlink backup device, and setting a fourth attenuation value of an adjustable attenuator in the front-end downlink backup device and the rear-end downlink backup device to be 0.

A functional test preparation module: and performing state preparation of a second uplink channel and a second downlink channel on the radio frequency forwarding system.

Preferably, the functional test preparation module comprises:

the second connection sub-module of the test equipment between the rear end radio frequency forwarding: and connecting an uplink remote control transmitting port of the Mars probe radio frequency testing equipment to an uplink channel inlet of the rear-end radio frequency forwarding cabinet, and connecting a downlink remote measuring receiving port of the Mars probe radio frequency testing equipment to a downlink channel outlet of the rear-end radio frequency forwarding cabinet.

The second connection sub-module of the test equipment between the front-end radio frequency forwarding: and an uplink channel outlet of the front-end radio frequency forwarding cabinet is connected to an uplink forwarding transmitting antenna on the fixed tower platform through a radio frequency cable, and a downlink channel inlet of the front-end radio frequency forwarding cabinet is connected to a downlink forwarding receiving antenna on the fixed tower platform through a radio frequency cable.

The uplink function testing module: and carrying out remote control signal forwarding function test on the second uplink channel.

Preferably, the uplink function testing module includes:

submodule M501: and setting the second uplink channel to be in a third master state, wherein the third master state represents that radio frequency signals are forwarded through the rear-end uplink master device, the optical fiber cable and the front-end uplink master device, and setting a fifth attenuation value of an adjustable attenuator in the rear-end uplink master device and the front-end uplink master device to be a first attenuation value.

Submodule M502: and powering up the answering machine electric part through the ground detection equipment.

Submodule M503: and the Mars detector radio frequency test equipment in the rear-end radio frequency forwarding room outputs an uplink remote control signal, and the third power value of the uplink remote control signal is equal to the middle value of the inlet power range of the rear-end uplink master device.

Submodule M504: and monitoring the working state of the responder through the ground detection equipment, confirming that the responder transmits to the second uplink channel forwarding and uplink forwarding transmitting antenna, and receiving and locking the uplink remote control signal received by the receiving antenna of the surround device are normal.

Submodule M505: the Mars detector radio frequency test equipment continuously sends a first remote control instruction frame with fixed data content for multiple times, receives a second remote control instruction frame which is received and demodulated from an uplink remote control signal by a responder through the ground detection equipment, carries out error code detection on the data content of the remote control instruction corresponding to the second remote control instruction frame, and confirms that the data content of the received remote control instruction has no error code.

Submodule M506: and setting the second uplink channel to be in a third backup state through control software of the radio frequency forwarding system, wherein the third backup state is characterized in that radio frequency signals are forwarded through the rear-end uplink backup device, the optical fiber cable and the front-end uplink backup device, and setting a sixth attenuation value of an adjustable attenuator in the rear-end uplink backup device and the front-end uplink backup device to be a second attenuation value.

Preferably, the submodule M505 includes:

Preferably, the downlink functional test module includes:

submodule M601: and setting the second downlink channel to be in a fourth master state through control software of the radio frequency forwarding system, wherein the fourth master state is characterized in that radio frequency signals are forwarded through the front-end downlink master device, the optical fiber cable and the rear-end downlink master device, and setting a seventh attenuation value of an adjustable attenuator in the front-end downlink master device and the rear-end downlink master device to be a third attenuation value.

Submodule M602: the ground detection equipment is used for electrifying the transponder electric element and the power amplifier electric element, a downlink transmitting port of the transponder electric element is arranged, and a downlink telemetering signal is output through the power amplifier electric element.

Submodule MS 603: and monitoring the receiving state of the downlink telemetering signals on the Mars detector radio frequency testing equipment, and confirming that the receiving and locking of the downlink telemetering signals by the Mars detector radio frequency testing equipment are normal.

Submodule M604: and continuously outputting a first telemetry frame with fixed data content through the ground detection equipment, and modulating and outputting the first telemetry frame through the transponder electrical part.

Submodule M605: and the Mars detector radio frequency test equipment receives the telemetry signal corresponding to the first telemetry frame, demodulates the telemetry data, performs error code detection on the telemetry data and confirms that the received telemetry data has no error code.

Submodule M606: and setting the second downlink channel to be in a fourth backup state through control software of the radio frequency forwarding system, wherein the fourth backup state is characterized in that radio frequency signals are forwarded through the front-end downlink backup device, the optical fiber cable and the rear-end downlink backup device, and eighth attenuation values of adjustable attenuators in the front-end downlink backup device and the rear-end downlink backup device are set to be fourth attenuation values.

Preferably, the sub-module M605 includes:

and presetting a second telemetry frame consistent with the data content of the first telemetry frame sent by the ground detection equipment as a comparison reference, and carrying out bit-by-bit consistency comparison on each third telemetry frame demodulated from the telemetry signal forwarded by the radio frequency forwarding system and the second telemetry frame as the comparison reference.

It is required to know that the transmitting antenna and the receiving antenna of the surround are both the original sample verification antenna, and the technical index is consistent with the original sample antenna of the Mars detector; when the antenna is placed on the rotary platform, the antenna support supports the antenna, so that the spatial position and the direction of the transmitting antenna and the receiving antenna of the surround are consistent with the spatial position and the antenna direction of the normal antenna when the Mars probe is placed in the fairing during real transmission, and the states of transmitting a telemetering signal by the transmitting antenna of the surround and receiving a remote control signal by the receiving antenna of the surround during the real transmission are simulated.

Wherein the technical index comprises at least one of the following: polarization mode, operating frequency band, antenna gain, beam width.

The invention can test the insertion loss and the radio frequency signal forwarding function of the uplink main backup channel and the downlink main backup channel of the radio frequency forwarding system of the transmitting field transmitting area before the Mars detector transmits, fully verifies the adaptability of the transmitting field radio frequency forwarding system to the Mars detector uplink remote control signal and downlink remote measurement signal forwarding, provides guidance for the forwarding scheme of the real transmitting day, comprises the attenuation setting of the downlink channel of the radio frequency forwarding system uplink channel on the real transmitting day, the position arrangement of the uplink forwarding transmitting antenna and the downlink forwarding receiving antenna and the like, and ensures the smooth communication of the uplink remote control signal and the downlink remote measurement signal between the Mars detector positioned on the transmitting tower and the testing equipment of the remote testing factory building on the real transmitting day.

Those skilled in the art will appreciate that, in addition to implementing the systems, apparatus, and various modules thereof provided by the present invention in purely computer readable program code, the same procedures can be implemented entirely by logically programming method steps such that the systems, apparatus, and various modules thereof are provided in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Therefore, the system, the device and the modules thereof provided by the present invention can be considered as a hardware component, and the modules included in the system, the device and the modules thereof for implementing various programs can also be considered as structures in the hardware component; modules that perform various functions may also be viewed as structures within both software programs that perform the methods and hardware components.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims

1. A testing method for a radio frequency forwarding system of a field emission area of a Mars probe is characterized by comprising the following steps:

a calibration preparation step: performing state preparation of a first uplink channel and a first downlink channel on the radio frequency forwarding system;

2. The method for testing the rf repeating system of the field emission area of a mars probe as claimed in claim 1, wherein said calibration preparation step comprises:

the first connection substep of the test equipment between the front-end radio frequency forwarding is as follows: connecting an uplink channel outlet of the front-end radio frequency forwarding cabinet to an uplink forwarding transmitting antenna on a fixed tower platform through a radio frequency cable, and connecting a downlink channel inlet of the front-end radio frequency forwarding cabinet to a downlink forwarding receiving antenna on the fixed tower platform through the radio frequency cable;

product on board first connection substep: the method comprises the steps of placing a surround transmitting antenna and a surround receiving antenna on a rotary platform in a fairing area, connecting the surround transmitting antenna to a second signal generator in a front-end radio frequency forwarding room through a radio frequency cable, and connecting the surround receiving antenna to a second spectrum analyzer in the front-end radio frequency forwarding room through the radio frequency cable.

3. The method for testing the rf forwarding system of the field emission area of the mars probe according to claim 2, wherein the uplink insertion loss calibration step comprises:

step S201: setting the first uplink channel to be in a first master state through control software of the radio frequency forwarding system, wherein the first master state is characterized in that radio frequency signals are forwarded through rear-end uplink master equipment, an optical fiber cable and front-end uplink master equipment, and first attenuation values of adjustable attenuators in the rear-end uplink master equipment and the front-end uplink master equipment are set to be 0;

step S202: the first signal generator in the back-end radio frequency forwarding room outputs a first single carrier signal, the frequency of the first single carrier signal is equal to the carrier frequency of a receiving signal of a transponder of a mars detector, and a first power value of the first single carrier signal is equal to the middle value of the entry power range of the back-end uplink master share equipment;

step S203: measuring uplink signal power transmitted by the first uplink channel forwarding and uplink forwarding transmitting antenna on the second spectrum analyzer between front-end radio frequency forwarding, received by the surround device receiving antenna, recording the uplink signal power value, and obtaining a first insertion loss reference value of the first uplink channel according to the first power value and the uplink signal power value;

step S204: adjusting the first attenuation values of the adjustable attenuators of the back-end uplink master device and the front-end uplink master device according to the first insertion loss reference value, measuring the uplink signal power on the second spectrum analyzer, enabling the uplink signal power received on the second spectrum analyzer to be equal to the middle value of the dynamic range of the received signal of the responder, and recording the first attenuation values;

step S205: setting the first uplink channel to be in a first backup state through the control software of the radio frequency forwarding system, wherein the first backup state is characterized in that radio frequency signals are forwarded through a rear-end uplink backup device, an optical fiber cable and a front-end uplink backup device, and second attenuation values of the adjustable attenuators in the rear-end uplink backup device and the front-end uplink backup device are set to be 0;

step S206: and repeatedly executing the steps S202 to S204, wherein during repeated execution, the back-end uplink main backup device in the steps S202 to S204 is replaced with the back-end uplink backup device, and the front-end uplink main backup device is replaced with the front-end uplink backup device, so as to complete the insertion loss calibration of the first uplink channel of the radio frequency forwarding system.

4. The method for testing the rf forwarding system of the field emission area of the mars probe according to claim 2, wherein the downlink insertion loss calibration step comprises:

step S301: setting the first downlink channel to be in a second master state through the radio frequency forwarding system control software, wherein the second master state represents that radio frequency signals are forwarded through front-end downlink master equipment, an optical fiber cable and rear-end downlink master equipment, and setting a third attenuation value of the adjustable attenuator in the front-end downlink master equipment and the rear-end downlink master equipment to be 0;

step S302: the second signal generator outputs a second single-carrier signal, the frequency of the second single-carrier signal is equal to the carrier frequency of the transmitting signal of the responder, and a second power value of the second single-carrier signal is equal to the output signal power value of the Mars detector measurement and control downlink channel power amplifier;

step S303: measuring the downlink signal power transmitted by the transmitter antenna of the surround device and received by the downlink forwarding receiving antenna and forwarded by the first downlink channel on the first spectrum analyzer, recording the downlink signal power value, and obtaining a second insertion loss reference value of the first downlink channel according to the second power value and the downlink signal power value;

step S304: adjusting the third attenuation values of the adjustable attenuators of the front-end downlink master equipment and the rear-end downlink master equipment according to the second insertion loss reference value, measuring downlink signal power on the first spectrum analyzer between the rear-end radio frequency forwarding, enabling the downlink signal power received by the first spectrum analyzer to be equal to the middle value of the dynamic range of the received signal of the Mars probe radio frequency test equipment, and recording the third attenuation values;

step S305: setting the first downlink channel to be in a second backup state through control software of the radio frequency forwarding system, wherein the second backup state is characterized in that radio frequency signals are forwarded through the front-end downlink backup device, the optical fiber cable and the rear-end downlink backup device, and fourth attenuation values of the adjustable attenuators in the front-end downlink backup device and the rear-end downlink backup device are set to be 0;

step S306: and repeatedly executing the steps S302 to S304, wherein during repeated execution, the front-end downlink master device in the steps S302 to S304 is replaced with the front-end downlink backup device, and the rear-end downlink master device is replaced with the rear-end downlink backup device, so as to complete the insertion loss calibration of the first downlink channel of the radio frequency forwarding system.

5. A method for testing a mars probe transmit field transmit area rf relay system according to claim 1 or 2, wherein the functional test preparation step comprises:

a second connection sub-step of the test equipment between the back-end radio frequency forwarding: connecting an uplink remote control transmitting port of Mars probe radio frequency testing equipment to an uplink channel inlet of the rear-end radio frequency forwarding cabinet, and connecting a downlink remote measuring receiving port of the Mars probe radio frequency testing equipment to a downlink channel outlet of the rear-end radio frequency forwarding cabinet;

the second connection substep of the test equipment between the front-end radio frequency forwarding is as follows: connecting an uplink channel outlet of the front-end radio frequency forwarding cabinet to the uplink forwarding transmitting antenna on the fixed tower platform through a radio frequency cable, and connecting a downlink channel inlet of the front-end radio frequency forwarding cabinet to the downlink forwarding receiving antenna on the fixed tower platform through a radio frequency cable;

a second connection sub-step of on-board products: the method comprises the steps of placing the surround transmitting antenna and the surround receiving antenna on the rotary platform in the fairing area, connecting the surround transmitting antenna to a downlink telemetering signal transmitting port of a power amplifier electric part of the Mars detector between front-end radio frequency forwarding through a radio frequency cable, connecting the surround receiving antenna to an uplink telemetering signal receiving port of a transponder electric part between front-end radio frequency forwarding through a radio frequency cable, and connecting the transponder electric part, the power amplifier electric part and the ground detection equipment.

6. The method for testing the Mars probe transmitting field transmitting area radio frequency repeating system according to claim 5, wherein the uplink function testing step comprises:

step S501: setting the second uplink channel to be in a third master state, wherein the third master state represents that radio frequency signals are forwarded through the rear-end uplink master device, the optical fiber cable and the front-end uplink master device, and setting a fifth attenuation value of an adjustable attenuator in the rear-end uplink master device and the front-end uplink master device to be the first attenuation value;

step S502: powering up the transponder electrical part by the ground detection device;

step S503: the Mars detector radio frequency test equipment in the rear-end radio frequency forwarding room outputs an uplink remote control signal, and the third power value of the uplink remote control signal is equal to the middle value of the inlet power range of the rear-end uplink master equipment;

step S504: monitoring the working state of the responder through the ground detection equipment, confirming that the responder forwards the second uplink channel and the uplink forwarding transmitting antenna transmits, and the uplink remote control signals received by the surround device receiving antenna are normally received and locked;

step S505: the Mars detector radio frequency test equipment continuously sends a first remote control instruction frame with fixed data content for multiple times, receives a second remote control instruction frame which is received and demodulated from the uplink remote control signal by the responder through the ground detection equipment, carries out error code detection on the data content of the remote control instruction corresponding to the second remote control instruction frame, and confirms that the data content of the received remote control instruction has no error code;

step S506: setting the second uplink channel to be in a third backup state through control software of the radio frequency forwarding system, where the third backup state is characterized in that radio frequency signals are forwarded through the back-end uplink backup device, the optical fiber cable and the front-end uplink backup device, and setting a sixth attenuation value of an adjustable attenuator in the back-end uplink backup device and the front-end uplink backup device to be the second attenuation value;

step S507: and repeatedly executing the steps S502 to S505, wherein, during repeated execution, the front-end uplink main sub-device in the steps S502 to S505 is replaced by the front-end uplink backup device, and the rear-end uplink main sub-device is replaced by the rear-end uplink backup device, so as to complete the forwarding function test of the second uplink channel of the radio frequency forwarding system.

7. The method for testing the rf forwarding system of the field emission area of a mars probe of claim 5, wherein the step of testing the downlink function comprises:

step S601: setting the second downlink channel to a fourth master state through control software of the radio frequency forwarding system, where the fourth master state is characterized in that radio frequency signals are forwarded through the front-end downlink master device, the optical fiber cable and the rear-end downlink master device, and setting a seventh attenuation value of an adjustable attenuator in the front-end downlink master device and the rear-end downlink master device to be the third attenuation value;

step S602: powering up the electric transponder part and the electric power amplifier part through the ground detection equipment, arranging a downlink transmitting port of the electric transponder part, and outputting a downlink telemetering signal through the electric power amplifier part;

step S603: monitoring the receiving state of the downlink telemetering signals on the Mars probe radio frequency testing equipment, and confirming that the receiving and locking of the downlink telemetering signals by the Mars probe radio frequency testing equipment are normal;

step S604: continuously outputting a first telemetry frame with fixed data content through the ground detection equipment, and modulating and outputting the first telemetry frame through the transponder electrical part;

step S605: the Mars detector radio frequency test equipment receives the telemetry signal corresponding to the first telemetry frame, demodulates the telemetry data, performs error code detection on the telemetry data and confirms that the received telemetry data has no error code;

step S606: setting the second downlink channel to a fourth backup state through control software of the radio frequency forwarding system, where the fourth backup state is characterized in that radio frequency signals are forwarded through the front-end downlink backup device, the optical fiber cable and the rear-end downlink backup device, and setting an eighth attenuation value of an adjustable attenuator in the front-end downlink backup device and the rear-end downlink backup device to be the fourth attenuation value;

step S607: and repeatedly executing the steps S602 to S605, wherein, during repeated execution, the front-end uplink main slave device in the steps S602 to S605 is replaced with the front-end uplink backup device, and the rear-end uplink main slave device is replaced with the rear-end uplink backup device, so as to complete the forwarding function test of the second downlink channel telemetry signal of the radio frequency forwarding system.

8. The method for testing the Mars probe transmitting field emission area RF repeating system of claim 6, wherein the step S505 comprises:

presetting a third remote control instruction frame which is consistent with the data content of the first remote control instruction frame sent by the Mars detector radio frequency test equipment as a comparison standard, and carrying out bit-by-bit consistency comparison on each second remote control instruction frame and the third remote control instruction frame.

9. The method for testing the rf repeating system of the Mars probe transmitting field emission area of claim 7, wherein the step S605 comprises:

10. A testing system for a radio frequency repeater system in a field emission area of a mars probe, comprising:

a calibration preparation module: performing state preparation of a first uplink channel and a first downlink channel on the radio frequency forwarding system;