CN102520262A - Device and method for testing radio-frequency waveguide of deep space aircraft - Google Patents
Device and method for testing radio-frequency waveguide of deep space aircraft Download PDFInfo
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- CN102520262A CN102520262A CN2011103624821A CN201110362482A CN102520262A CN 102520262 A CN102520262 A CN 102520262A CN 2011103624821 A CN2011103624821 A CN 2011103624821A CN 201110362482 A CN201110362482 A CN 201110362482A CN 102520262 A CN102520262 A CN 102520262A
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Abstract
The invention relates to a device for testing the radio-frequency waveguide of a deep space aircraft. The device comprises a upstream part and a downstream part, wherein the upstream part comprises a shielding cavity for shielding wireless signals; the shielding cavity is of a hollow barrel shape, the bottom face and the top face of the shielding cavity are respectively provided with a through hole, and the two through holes are used for the insertion of a receiving antenna of the deep space aircraft and a transmitting antenna of the ground respectively; the inner part of the shielding cavity is coated with a wave-absorbing material; the downstream part comprises an adapter waveguider for shielding a wireless signal and a waveguide coaxial converter for converting the wireless signal into an electric signal transmitted in a wired cable; the adapter waveguider is a hollow tubular connecting cavity, one end of the adapter waveguider is connected with the transmitting antenna of the deep space aircraft, and the other end of the adapter waveguider is connected to the input end of the waveguide coaxial converter; and the output end of the waveguide coaxial converter is connected to a ground testing device through the wired cable.
Description
Technical field
The present invention relates to spacecraft radio frequency testing field, particularly a kind of deep space spacecraft radio-frequency plumbing proving installation.
Background technology
For security and the reliability that guarantees space travel, spacecraft all will be done a large amount of tests before emission, and the spacecraft radio frequency testing is exactly wherein a kind of.In the prior art, the spacecraft radio frequency testing divides wired test, wireless test.The wire radio test is meant that the Receiver And Transmitter of spacecraft connects high frequency cable and carries out radio frequency testing to ground checkout equipment, and this method exists test imperfect (not comprising antenna part), high frequency connector will repeatedly plug problems such as reducing reliability; The less radio-frequency test is meant that the antenna of spacecraft and ground-plane antenna carry out the wireless connections test; This method is for the deep space spacecraft; Because the energy of wireless electromagnetic wave radiation is huge; Therefore tester and operating personnel can not nearby work, and need test (being the EMC factory building) at special electromagnetic wave shielding factory building, and having spacecraft need change problems such as factory's rewiring, workload are big.
Summary of the invention
The present invention seeks to overcome existing deep space spacecraft radio frequency test method or test imperfect, reliability is lower, the defective that perhaps easily human body is damaged, thus a kind of proving installation safe, easy to use and method of testing are provided.
In order to reach the foregoing invention purpose, the invention provides a kind of deep space spacecraft radio-frequency plumbing proving installation, comprise ascender and descender; Wherein,
Described ascender comprises the shielding cavity that is used to shield wireless signal; Said shielding cavity becomes the tubbiness of hollow, has a through hole separately in bottom surface and end face, and these two through holes are respectively applied for the receiving antenna of assigning said deep space spacecraft and the emitting antenna on ground; The inside of said shielding cavity scribbles absorbing material;
Described descender comprises the Waveguide coaxial conversion that is used for shielding the switching waveguide of wireless signal and is used for wireless signal is converted to the electric signal that wire cable transmits; The tubulose connection chamber that described switching waveguide is a hollow, the one of which end is connected to the emitting antenna of said deep space spacecraft, and its other end is connected to the input end of said Waveguide coaxial conversion; The output terminal of said Waveguide coaxial conversion is connected to the testing apparatus on ground through wire cable.
In the technique scheme, the inwall of said switching waveguide scribbles absorbing material.
In the technique scheme, the receiving antenna of the size of the through hole in the said shielding cavity and said deep space spacecraft, the outside dimension of ground emitting antenna are consistent, make can closely cooperate between them.
The present invention also provides a kind of method of utilizing described deep space spacecraft radio-frequency plumbing proving installation to carry out radio-frequency plumbing test, comprises the test of uplink communication link and test to the downlink communication link;
Method of testing to the uplink communication link comprises:
Step 1-1), radio-frequency plumbing proving installation ascender is connected between the receiving antenna and ground emitting antenna of deep space spacecraft in the uplink communication link;
Step 1-2), the performance index of antenna are tested, to confirm step 1-1) whether the connection accomplished normal;
Step 1-3), the receiving antenna of command receiver with said deep space spacecraft is connected, said ground emitting antenna is connected with the ground upstream transmitter;
Step 1-4), ground upstream transmitter start work;
Step 1-5), command receiver start work, receive ground up-on command data;
Step 1-6), the peripheral electromagnetic leakage intensity of testing radio frequency waveguide proving installation ascender;
Method of testing to the downlink communication link comprises:
Step 2-1), radio-frequency plumbing proving installation descender is connected between the emitting antenna and ground checkout equipment of deep space spacecraft in the downlink communication link;
Step 2-2), the performance index of antenna are tested, to confirm step 2-1) whether the connection accomplished normal;
Step 2-3), command transmitter is connected to the emitting antenna of said deep space spacecraft;
Step 2-4), command transmitter start work;
Step 2-5), command receiver start work, receive the downlink command data;
Step 2-6), the peripheral electromagnetic leakage intensity of testing radio frequency waveguide proving installation descender.
In the technique scheme, at step 1-2) in, the performance index of described antenna comprise up standing-wave ratio (SWR) and loss; At step 2-2) in, the performance index of described antenna comprise descending standing-wave ratio (SWR) and loss.
Method of testing of the present invention and proving installation on a China's first Mars probes through having gone sufficient checking, from 1 meter of emitting antenna of 63W, low more than 2100 times of the safety index that electromagnetic radiation can be born than human body in the GB.Can under personnel's near work state, carry out the total power radio frequency testing.
Description of drawings
Fig. 1 is the synoptic diagram of radio-frequency plumbing Test Application scene;
Fig. 2 is the structural representation of radio-frequency plumbing proving installation descender of the present invention;
Fig. 3 is the structural representation of radio-frequency plumbing proving installation ascender of the present invention;
Fig. 4 is the scheme of installation of radio-frequency plumbing proving installation descender of the present invention in descending current link;
Fig. 5 is the scheme of installation of radio-frequency plumbing proving installation ascender of the present invention in the uplink communication link.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Satellite is the most common a kind of deep space spacecraft, just is example with the satellite among the embodiment below, and radio-frequency plumbing proving installation of the present invention is described.
With reference to figure 1, at first the application scenarios to radio-frequency plumbing proving installation of the present invention describes.
The communication process on satellite and ground comprises uplink communication and downlink communication, and described uplink communication is meant that ground-launched wireless signal uploads to satellite, is received by the wireless antenna of satellite; Described downlink communication is meant that the wireless signal that the emitting antenna of satellite is launched is received by ground.Radio-frequency plumbing proving installation of the present invention need be tested respectively above-mentioned uplink communication process and downlink communication process when carrying out the radio-frequency plumbing test.Therefore, this proving installation comprises ascender and descender.
In Fig. 2, radio-frequency plumbing proving installation descender is described in detail.Described descender comprises switching waveguide and Waveguide coaxial conversion.The tubulose connection chamber that described switching waveguide is a hollow plays the effect of shielding wireless signal, and described Waveguide coaxial conversion then is used for converting wireless signal to wire signal that concentric cable transmits.As a kind of preferred implementation, the inwall of switching waveguide scribbles absorbing material.
Before satellite being done the radio-frequency plumbing test, need earlier radio-frequency plumbing proving installation descender to be connected in the downlink.As shown in Figure 2, through clip and clamp nut the emitting antenna of satellite is connected to an end of switching waveguide, the other end of said switching waveguide is connected with the input end that Waveguide coaxial is changed through clip, clamp nut equally.On the cable that output terminal is connected to ground checkout equipment links to each other of said Waveguide coaxial conversion.Connection between above-mentioned emitting antenna, switching waveguide, the Waveguide coaxial conversion should be airtight as much as possible, to prevent the leakage of wireless signal.
After being connected to radio-frequency plumbing proving installation descender in the communication link, also need test the performance index of antenna and Waveguide coaxial conversion, whether normal to confirm connection.As shown in Figure 2, before test, need to adopt network analyzer to receive the standing-wave ratio (SWR) and the loss of emitting antenna in radio-frequency plumbing proving installation descender of emitting antenna port, in an example, descending standing-wave ratio (SWR) 1.2G, loss-1dB.After standing-wave ratio (SWR) and loss test completion; As shown in Figure 4; Command transmitter is connected with the low gain emitting antenna of satellite through launched microwave switch, antenna microwave switch successively, descender is connected with the ground test cable, the back connects ground checkout equipment.Command transmitter on the last satellite is started working, and ground testing apparatus receives the downlink command data, and the electromagnetic leakage intensity of testing peripheral space simultaneously.
In Fig. 3, radio-frequency plumbing proving installation ascender is described in detail.Described ascender comprises shielding cavity, and said shielding cavity becomes the tubbiness of hollow, but has through hole in bottom surface and end face, and these two through holes are respectively applied for the receiving antenna of assigning satellite and the emitting antenna on ground.The size of said through hole should be consistent as far as possible with the outside dimension of satellite earth antenna, ground emitting antenna, makes can closely cooperate between them.Inside at shielding cavity scribbles absorbing material.
Before satellite being done the radio-frequency plumbing test, need earlier radio-frequency plumbing proving installation ascender to be connected in the up-link.As shown in Figure 3; The part that the receiving antenna outside surface of satellite need be connected with shielding cavity is protected with paper self-adhesive tape; Be enclosed with at receiving antenna then two semicircular geometrical clamps are installed on the position of paper self-adhesive tape; These two geometrical clamps are fixed through lock-screw, note that when mounted the screw thread coupling of two geometrical clamps is good.Receiving antenna is assigned the into corresponding through hole of shielding cavity, and shielding cavity directly is connected fixing with the receiving antenna geometrical clamp through screw thread, utilizes clip to reinforce at the receiving antenna of satellite and the coupling part of shielding cavity again, prevents the leakage of wireless signal as far as possible.Being connected between the emitting antenna that can realize ground in a similar fashion and shielding cavity.Though in Fig. 3; The receiving antenna of satellite is the low gain receiving antenna; But the high-gain receiving antenna adopts the ascender of radio-frequency plumbing proving installation equally, and just the size of through hole etc. need be adjusted according to the high-gain receiving antenna on the size of shielding cavity, the shielding cavity.
After being connected to radio-frequency plumbing proving installation ascender in the communication link, also need test the performance index of antenna, whether normal to confirm connection.As shown in Figure 3, the loss after using network analyzer test receiving antenna port standing-wave ratio (SWR) and receiving antenna and shielding cavity being connected.In an example, up standing-wave ratio (SWR) 1.1G, loss-23dB.Resulting here up standing-wave ratio (SWR) and the descending standing-wave ratio (SWR) that calculates before all satisfy standing-wave ratio (SWR) less than 1.5 requirement.But because up shielding cavity is big, therefore aerial loss is also big.After the test of standing-wave ratio (SWR) and loss is accomplished, as shown in Figure 5, use satellite to be connected command receiver and receiving antenna and fix with high frequency cable, shielding cavity is connected with the ground test cable, connects the ground upstream transmitter at the back.Ground upstream transmitter start work through between transmitter and shielding cavity, adding the mode of cable and attenuator, realizes the requirement of shielding cavity input port signal intensity pact-110dBmW.Receiver start work test receives ground up-on command data.And the electromagnetic leakage intensity of testing the shielding cavity peripheral space simultaneously.
In Fig. 4, radio-frequency plumbing test process shown in Figure 5; The transmission of wireless signal is all accomplished in the radio-frequency plumbing proving installation with reception; And the radio-frequency plumbing proving installation can shield the wireless signal in the transmission course, has avoided the leakage of wireless signal effectively.The electromagnetic screen testing apparatus can be installed in frame of broken lines position in Fig. 1, and test result shows from 1 meter of emitting antenna of 63W, low more than 2100 times of the safety index that electromagnetic radiation can be born than human body in the GB.
Claims (5)
1. a deep space spacecraft radio-frequency plumbing proving installation is characterized in that, comprises ascender and descender; Wherein,
Described ascender comprises the shielding cavity that is used to shield wireless signal; Said shielding cavity becomes the tubbiness of hollow, has a through hole separately in bottom surface and end face, and these two through holes are respectively applied for the receiving antenna of assigning said deep space spacecraft and the emitting antenna on ground; The inside of said shielding cavity scribbles absorbing material;
Described descender comprises the Waveguide coaxial conversion that is used for shielding the switching waveguide of wireless signal and is used for wireless signal is converted to the electric signal that wire cable transmits; The tubulose connection chamber that described switching waveguide is a hollow, the one of which end is connected to the emitting antenna of said deep space spacecraft, and its other end is connected to the input end of said Waveguide coaxial conversion; The output terminal of said Waveguide coaxial conversion is connected to the testing apparatus on ground through wire cable.
2. deep space spacecraft radio-frequency plumbing proving installation according to claim 1 is characterized in that the inwall of said switching waveguide scribbles absorbing material.
3. deep space spacecraft radio-frequency plumbing proving installation according to claim 1; It is characterized in that; The receiving antenna of the size of the through hole in the said shielding cavity and said deep space spacecraft, the outside dimension of ground emitting antenna are consistent, make can closely cooperate between them.
4. method that the deep space spacecraft radio-frequency plumbing proving installation that utilizes one of claim 1-3 carries out the radio-frequency plumbing test comprises the test of uplink communication link and test to the downlink communication link;
Method of testing to the uplink communication link comprises:
Step 1-1), radio-frequency plumbing proving installation ascender is connected between the receiving antenna and ground emitting antenna of deep space spacecraft in the uplink communication link;
Step 1-2), the performance index of antenna are tested, to confirm step 1-1) whether the connection accomplished normal;
Step 1-3), the receiving antenna of command receiver with said deep space spacecraft is connected, said ground emitting antenna is connected with the ground upstream transmitter;
Step 1-4), ground upstream transmitter start work;
Step 1-5), command receiver start work, receive ground up-on command data;
Step 1-6), the peripheral electromagnetic leakage intensity of testing radio frequency waveguide proving installation ascender;
Method of testing to the downlink communication link comprises:
Step 2-1), radio-frequency plumbing proving installation descender is connected between the emitting antenna and ground checkout equipment of deep space spacecraft in the downlink communication link;
Step 2-2), the performance index of antenna are tested, to confirm step 2-1) whether the connection accomplished normal;
Step 2-3), command transmitter is connected to the emitting antenna of said deep space spacecraft;
Step 2-4), command transmitter start work;
Step 2-5), command receiver start work, receive the downlink command data;
Step 2-6), the peripheral electromagnetic leakage intensity of testing radio frequency waveguide proving installation descender.
5. the method for radio-frequency plumbing test according to claim 4 is characterized in that, at step 1-2) in, the performance index of described antenna comprise up standing-wave ratio (SWR) and loss; At step 2-2) in, the performance index of described antenna comprise descending standing-wave ratio (SWR) and loss.
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| CN102981065A (en) * | 2012-11-02 | 2013-03-20 | 中原工学院 | Sectioned tubular measurement device and test method for shielding effectiveness of electromagnetic shielding fabric |
| CN103051396A (en) * | 2012-12-11 | 2013-04-17 | 上海卫星工程研究所 | Test method of deep-space high-stability beacon |
| CN103675501A (en) * | 2012-09-21 | 2014-03-26 | 北京航天长征飞行器研究所 | Wireless transmission waveguide test device |
| CN103840897A (en) * | 2014-02-28 | 2014-06-04 | 北京航天飞行控制中心 | Deep space link margin correction method |
| CN104462188A (en) * | 2014-10-23 | 2015-03-25 | 北京空间飞行器总体设计部 | Spacecraft intelligent task planning test method and system |
| CN113113772A (en) * | 2021-04-06 | 2021-07-13 | 上海航天测控通信研究所 | Waveguide antenna adapter for satellite wireless test |
| CN113815909A (en) * | 2021-09-09 | 2021-12-21 | 中国人民解放军63920部队 | Uplink determining method and device for peer-to-peer mode combined configuration spacecraft |
| CN114024883A (en) * | 2021-11-05 | 2022-02-08 | 江西洪都航空工业集团有限责任公司 | Method, device and system for open-loop parallel testing of multiple products of data chain |
| CN114465672A (en) * | 2022-01-14 | 2022-05-10 | 上海卫星工程研究所 | Testing method and system for radio frequency forwarding system of field emission region of Mars detector |
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| CN114024883A (en) * | 2021-11-05 | 2022-02-08 | 江西洪都航空工业集团有限责任公司 | Method, device and system for open-loop parallel testing of multiple products of data chain |
| CN114024883B (en) * | 2021-11-05 | 2023-11-17 | 江西洪都航空工业集团有限责任公司 | Method, device and system for open-loop parallel testing of multiple products of data link |
| CN114465672A (en) * | 2022-01-14 | 2022-05-10 | 上海卫星工程研究所 | Testing method and system for radio frequency forwarding system of field emission region of Mars detector |
| CN114465672B (en) * | 2022-01-14 | 2023-12-12 | 上海卫星工程研究所 | Test method and system for radio frequency forwarding system of Mars detector emission field emission area |
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