CN212627875U - All-round two stations receive front end device - Google Patents
All-round two stations receive front end device Download PDFInfo
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- CN212627875U CN212627875U CN202021757456.XU CN202021757456U CN212627875U CN 212627875 U CN212627875 U CN 212627875U CN 202021757456 U CN202021757456 U CN 202021757456U CN 212627875 U CN212627875 U CN 212627875U
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Abstract
The utility model provides an all-round two-station reception front-end device, including darkroom and control room, a serial communication port, be provided with first receiving component in the darkroom, second receiving component, pulse generator, the local oscillator signal source, synchronous chronogenesis monitoring facilities and communication supervisor, first receiving component includes first antenna group, first two second axis servo equipment and first radio frequency module, second receiving component includes second antenna group, second two axis servo equipment and second radio frequency module, pulse generator, local oscillator signal source and synchronous chronogenesis monitoring facilities are respectively in first radio frequency module, second radio frequency module connection and communication supervisor, communication supervisor is connected with the main control computer that sets up in the control room; the automatic operation is realized by controlling through a main control computer, and the testing efficiency is improved; meanwhile, through double-path receiving, the problem that errors existing in single-path receiving are not easy to find is avoided, and the accuracy of the method is improved.
Description
Technical Field
The utility model belongs to the technical field of electromagnetic compatibility, concretely relates to front end device is received to all-round two stations.
Background
The microwave darkroom is an important test facility for carrying out microwave antenna measurement, RCS measurement and electromagnetic compatibility measurement. The performance indexes of reflectivity level, field uniformity and the like of a quiet area of the microwave darkroom have great influence on test measurement in the microwave darkroom. Therefore, the performance index of the dead space needs to be measured in the acceptance after the dark room is built or in the regular inspection during the use. Generally, a microwave darkroom performance measuring system mainly comprises a microwave signal transmitting part, a microwave signal receiving part, a motion scanning part, a data acquisition and analysis part and the like. The measurement of the performance of the microwave anechoic chamber is a system engineering, and a system control scheme is needed in order to realize good control of each part and ensure that the system works coordinately. Usually, darkroom measurement is manually completed, control over each part is also manually achieved, workload is large, time consumption is long, and measurement repeatability and accuracy cannot be guaranteed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an all-round two stations receive front end device to solve darkroom measuring automation and improve the efficiency and the accuracy of test.
The utility model provides a following technical scheme:
an omnibearing double-station receiving front-end device comprises a darkroom and a control room, wherein a first receiving component, a second receiving component, a pulse signal generator, a local oscillator signal source, synchronous time sequence monitoring equipment and a communication manager are arranged in the darkroom, the first receiving component comprises a first antenna group, first two-axis servo equipment and a first radio frequency module, and the first antenna group is fixed on the first two-axis servo equipment and connected with the first radio frequency module; the second receiving assembly comprises a second antenna group, second-axis servo equipment and a second radio frequency module, and the second antenna group is fixed on the second-axis servo equipment and connected with the second radio frequency module; the pulse signal generator, the local oscillator signal source and the synchronous time sequence monitoring equipment are respectively connected with the first radio frequency module, the second radio frequency module and the communication manager, and the communication manager is connected with a main control computer arranged in the control room.
Preferably, a scanning frame is further arranged in the darkroom, and the first receiving assembly and the second receiving assembly are respectively mounted on the scanning frame and move along with the scanning frame; the pulse signal generator, the communication manager, the synchronous time sequence monitoring equipment and the local oscillator signal source are respectively located below the scanning frame and connected with the first receiving assembly and the second receiving assembly through the towline cable.
Preferably, the first two-axis servo device and the second two-axis servo device adjust the first antenna group and the second antenna group to a predetermined direction according to an instruction, and receive two signals of horizontal polarization and vertical polarization simultaneously.
Preferably, the first radio frequency module and the second radio frequency module provide two frequency conversion channels, and mix the two signals of horizontal polarization and vertical polarization received by the first antenna group and the second antenna group with two homologous local oscillators of the local oscillator signal source, and down-convert the two signals to two intermediate frequency signals.
Preferably, the two intermediate frequency signals are modulated by two TTL pulse signals with adjustable relative delay sent by the pulse signal generator, and then output two intermediate frequency pulse signals with horizontal polarization and vertical polarization.
Preferably, the synchronous timing monitoring device has two input channels, which are respectively connected with the synchronous pulse monitoring interfaces of the first radio frequency module and the second radio frequency module, and can detect the amplitude and timing of the two synchronous pulses.
Preferably, the communication manager is provided with a plurality of RS422 interfaces, collects information of the first receiving component, the second receiving component, the pulse signal generator, the local oscillator signal source and the synchronous time sequence monitoring equipment in the darkroom, sends the collected information to the main control computer in the control room through the LAN line, and responds and transmits instructions sent by the main control computer.
Preferably, the first two-axis servo equipment and the second two-axis servo equipment are identical in structure and respectively comprise a first servo rotary table, a second servo rotary table and an antenna installation seat, the first servo rotary table drives the second servo rotary table to rotate along the Z-axis direction, the second servo rotary table drives the antenna installation seat to rotate along the X-axis direction or the Y-axis direction, and the antenna installation seat is used for fixing the first antenna group or the second antenna group.
The utility model has the advantages that:
the utility model relates to an omnibearing double-station receiving front-end device, which is arranged on a large-scale scanning frame and is used for constructing two independent dual-polarized air-feed radio frequency receiving channels under the condition of an internal environment; the obtained signal forms a fixed intermediate frequency after frequency conversion, pulse modulation and amplitude and phase correction, and the fixed intermediate frequency is used by a post-stage signal processing system; the automatic operation is realized by controlling through a main control computer, and the testing efficiency is improved; meanwhile, through double-path receiving, the problem that errors existing in single-path receiving are not easy to find is avoided, and the accuracy of the method is improved.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of the overall connection of the present invention;
FIG. 2 is a schematic structural view of a first two-axis servo device and a second two-axis servo device;
labeled as: 1. the antenna mounting structure comprises a first servo turntable, 2 a second servo turntable, and 3 an antenna mounting base.
Detailed Description
As shown in fig. 1, an omnidirectional two-station receiving front-end device includes a darkroom and a control room; the darkroom is internally provided with a first receiving assembly, a second receiving assembly, a pulse signal generator, a local oscillator signal source, synchronous time sequence monitoring equipment and a communication manager, wherein the first receiving assembly comprises a first antenna group, first two-axis servo equipment and a first radio frequency module, and the first antenna group is fixed on the first two-axis servo equipment and connected with the first radio frequency module; the second receiving assembly comprises a second antenna group, second-axis servo equipment and a second radio frequency module, and the second antenna group is fixed on the second-axis servo equipment and connected with the second radio frequency module; the pulse signal generator, the local oscillator signal source and the synchronous time sequence monitoring equipment are respectively connected with the first radio frequency module, the second radio frequency module and the communication manager, and the communication manager is connected with a main control computer arranged in the control room.
As shown in fig. 2, the first biaxial servo device and the second biaxial servo device have the same structure, and both include a first servo turntable 1, a second servo turntable 2, and an antenna mounting base 3, the first servo turntable 1 drives the second servo turntable 2 to rotate along the Z-axis direction, the second servo turntable 2 drives the antenna mounting base 3 to rotate along the X-axis direction or the Y-axis direction, and the antenna mounting base 3 is used for fixing the first antenna group or the second antenna group.
The darkroom is also provided with a scanning frame, and the first receiving assembly and the second receiving assembly are respectively arranged on the scanning frame and move along with the scanning frame; the pulse signal generator, the communication manager, the synchronous time sequence monitoring equipment and the local oscillator signal source are respectively located below the scanning frame and connected with the first receiving assembly and the second receiving assembly through the towline cable.
The working process is as follows:
(1) and the first two-axis servo equipment and the second two-axis servo equipment adjust the first antenna group and the second antenna group to preset directions according to instructions and receive two paths of signals of horizontal polarization and vertical polarization simultaneously.
(2) The first radio frequency module and the second radio frequency module provide two frequency conversion channels, horizontally polarized and vertically polarized signals received by the first antenna group and the second antenna group are mixed with two homologous local oscillators of a local oscillator signal source, and the two signals are down-converted into two intermediate frequency signals.
(3) After two paths of intermediate frequency signals are modulated by two paths of TTL pulse signals with adjustable relative time delay sent by a pulse signal generator, two paths of intermediate frequency pulse signals with horizontal polarization and two paths of intermediate frequency pulse signals with vertical polarization are output.
(4) The synchronous time sequence monitoring equipment is provided with two input channels which are respectively connected with synchronous pulse monitoring interfaces of the first radio frequency module and the second radio frequency module, and can detect the amplitude and the time sequence of two paths of synchronous pulses.
(5) The communication manager is provided with a plurality of RS422 interfaces, collects information of the first receiving component, the second receiving component, the pulse signal generator, the local oscillator signal source and the synchronous time sequence monitoring equipment in the darkroom, sends the information to the main control computer in the control room through the LAN line, and responds and transmits an instruction issued by the main control computer.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. An omnibearing double-station receiving front-end device comprises a darkroom and a control room, and is characterized in that a first receiving component, a second receiving component, a pulse signal generator, a local oscillator signal source, synchronous time sequence monitoring equipment and a communication manager are arranged in the darkroom, the first receiving component comprises a first antenna group, first two-axis servo equipment and a first radio frequency module, and the first antenna group is fixed on the first two-axis servo equipment and connected with the first radio frequency module; the second receiving assembly comprises a second antenna group, second two-axis servo equipment and a second radio frequency module, and the second antenna group is fixed on the second two-axis servo equipment and connected with the second radio frequency module; the pulse signal generator, the local oscillator signal source and the synchronous time sequence monitoring equipment are respectively connected with the first radio frequency module, the second radio frequency module and the communication management machine, and the communication management machine is connected with a main control computer arranged in the control room.
2. The omni-directional dual-station receiving front-end device according to claim 1, wherein a scanning frame is further disposed in the darkroom, and the first receiving assembly and the second receiving assembly are respectively mounted on the scanning frame and move with the scanning frame; the pulse signal generator, the communication manager, the synchronous time sequence monitoring equipment and the local oscillator signal source are respectively located below the scanning frame and connected with the first receiving assembly and the second receiving assembly through the towline cable.
3. The omni-directional dual-station receiving front-end device according to claim 1, wherein the first two-axis servo device and the second two-axis servo device adjust the first antenna group and the second antenna group to a predetermined orientation according to a command, and receive two signals of horizontal polarization and vertical polarization simultaneously.
4. The omni-directional dual-station receive front-end device according to claim 3, wherein the first and second rf modules provide two frequency conversion channels for mixing the two signals received by the first and second antenna groups with two local oscillators from a local oscillator signal source, and down-converting the two signals to two intermediate frequency signals.
5. The omni-directional dual-station receiving front-end device according to claim 4, wherein the two intermediate frequency signals are modulated by two TTL pulse signals with adjustable relative delay sent by the pulse signal generator, and then output two horizontally polarized intermediate frequency pulse signals and two vertically polarized intermediate frequency pulse signals.
6. The omni-directional two-station receiving front-end device according to claim 1, wherein the synchronous timing monitoring equipment has two input channels, which are respectively connected to the synchronous pulse monitoring interfaces of the first rf module and the second rf module, and can detect the amplitude and timing of two synchronous pulses.
7. The omnibearing double-station receiving front-end device as claimed in claim 1, wherein the communication manager has a plurality of RS422 interfaces, collects information of the first receiving component, the second receiving component, the pulse signal generator, the local oscillator signal source and the synchronous timing monitoring device in the darkroom, sends the collected information to the main control computer in the control room through the LAN line, and responds and transmits an instruction issued by the main control computer.
8. The omni-directional dual-station receiving front-end device according to claim 1, wherein the first two-axis servo equipment and the second two-axis servo equipment have the same structure, and each of the first two-axis servo equipment and the second two-axis servo equipment comprises a first servo turntable, a second servo turntable and an antenna mounting base, the first servo turntable drives the second servo turntable to rotate along the Z-axis direction, the second servo turntable drives the antenna mounting base to rotate along the X-axis direction or the Y-axis direction, and the antenna mounting base is used for fixing the first antenna group or the second antenna group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021757456.XU CN212627875U (en) | 2020-08-20 | 2020-08-20 | All-round two stations receive front end device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021757456.XU CN212627875U (en) | 2020-08-20 | 2020-08-20 | All-round two stations receive front end device |
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| Publication Number | Publication Date |
|---|---|
| CN212627875U true CN212627875U (en) | 2021-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021757456.XU Active CN212627875U (en) | 2020-08-20 | 2020-08-20 | All-round two stations receive front end device |
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| CN (1) | CN212627875U (en) |
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- 2020-08-20 CN CN202021757456.XU patent/CN212627875U/en active Active
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