CN220120995U - GNSS forwarding system - Google Patents
GNSS forwarding system Download PDFInfo
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- CN220120995U CN220120995U CN202320288080.XU CN202320288080U CN220120995U CN 220120995 U CN220120995 U CN 220120995U CN 202320288080 U CN202320288080 U CN 202320288080U CN 220120995 U CN220120995 U CN 220120995U
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- 238000012545 processing Methods 0.000 claims abstract description 75
- 238000004891 communication Methods 0.000 claims abstract description 21
- 239000003990 capacitor Substances 0.000 claims description 28
- 238000001514 detection method Methods 0.000 claims description 4
- 230000007547 defect Effects 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Abstract
The utility model relates to the technical field of satellites, in particular to a GNSS forwarding system; the GNSS forwarding system comprises an outdoor input antenna, a processing unit, a control unit, a 485 communication unit and a plurality of paths of indoor output antennas, wherein the processing unit is respectively connected with the outdoor input antenna and the plurality of paths of indoor output antennas to perform gain adjustment on outdoor GNSS signals, the control unit is connected with the processing unit through the 485 communication unit to perform parameter control on the processing unit according to instructions, and the control unit can be connected with an external terminal through the 485 communication unit; according to the utility model, gain adjustment of GNSS signals is realized through the outdoor input antenna, the indoor output antenna and the processing unit, and gains are controlled by transmitting corresponding instructions to the control unit through the 485 communication unit, so that the GNSS signals after the gains meet parameter setting, remote control of the gains is realized, and the defect that personnel are required to manually adjust the gains on site is overcome.
Description
Technical Field
The utility model relates to the technical field of satellites, in particular to a GNSS forwarding system.
Background
The aerospace industry in China has rapidly developed, various military and civil aircrafts and spacecrafts are parked in a parking shed and a parking fort, and GNSS signals are not received in the parking shed and the parking fort, so that GNSS transponders are required to be deployed.
The existing GNSS repeater system is mostly realized by integrating a power divider and an amplifier, and the system architecture has the problems that the gain is not large enough to support long-distance wiring, the gain cannot be adjusted or is inconvenient to adjust, and the like; therefore, the aircraft is easy to be interfered by the outside in the starting process of the aircraft and cannot work normally.
It is therefore critical to the art to design a GNSS repeater system that has a large gain and facilitates gain adjustment.
Disclosure of Invention
The technical problem to be solved by the utility model is to provide a GNSS forwarding system with large gain and convenient gain adjustment aiming at the defects of the prior art, and the technical problems that the prior art is not large enough to support long-distance wiring, the gain cannot be adjusted or the adjustment is very inconvenient are overcome.
The technical scheme adopted for solving the technical problems is as follows: the GNSS forwarding system comprises an outdoor input antenna, a processing unit, a control unit, a 485 communication unit and a plurality of paths of indoor output antennas, wherein the processing unit is respectively connected with the outdoor input antenna and the plurality of paths of indoor output antennas, the control unit is connected with the processing unit through the 485 communication unit, and the control unit can be connected with an external terminal through the 485 communication unit.
The preferred scheme is as follows: the processing unit comprises a first processing circuit, a first matching circuit, a second processing circuit and a public branch circuit, wherein the input end of the first processing circuit is connected with the outdoor input antenna, the first matching circuit is arranged between the first processing circuit and the second processing circuit, the input end of the public branch circuit is connected with the output end of the second processing circuit, and the output end of the public branch circuit is connected with a plurality of indoor output antennas.
The preferred scheme is as follows: the first processing circuit comprises a first amplifier, a first attenuation chip and a second amplifier, wherein the first amplifier is connected with the outdoor input antenna, the first attenuation chip is arranged between the first amplifier and the second amplifier, and the output end of the second amplifier is connected with the input end of the first matching circuit.
The preferred scheme is as follows: the second processing circuit comprises a second attenuation chip and a third amplifier, the second attenuation chip is arranged between the first matching circuit and the third amplifier, and the output end of the third amplifier is connected with the common division circuit.
The preferred scheme is as follows: and a second matching circuit is further arranged between the second processing circuit and the public division circuit.
The preferred scheme is as follows: the first matching circuit comprises a first resistor, a first capacitor and a second capacitor, one end of the first resistor is connected with the output end of the first processing circuit, the other end of the first resistor is connected with the input end of the second processing circuit, and the first capacitor and the second capacitor are arranged at two ends of the first resistor.
The preferred scheme is as follows: the second matching circuit comprises a second resistor, a third capacitor and a fourth capacitor, one end of the second resistor is connected with the output end of the second processing circuit, the other end of the second resistor is connected with the input end of the public branch circuit, and the third capacitor and the fourth capacitor are arranged at two ends of the second resistor.
The preferred scheme is as follows: the GNSS forwarding system comprises one path of outdoor input antenna and four paths of indoor output antennas; the public branch circuit comprises a first public branch module, a second public branch module and a third public branch module, wherein the input end of the first public branch module is connected with the output end of the second processing circuit, the two output ends of the first public branch module are respectively connected with the input end of the second public branch module and the input end of the third public branch module, and the output ends of the second public branch module and the third public branch module are respectively connected with four paths of indoor output antennas.
The preferred scheme is as follows: the multiple indoor output antennas are connected with the control unit, and a switch module is arranged between the control unit and each indoor output antenna.
The preferred scheme is as follows: and a voltage detection end is arranged between the control unit and each indoor output antenna.
Compared with the prior art, the gain control device has the beneficial effects that the gain control device is arranged on the outdoor input antenna, the indoor output antenna and the processing unit, so that the functions of performing gain adjustment on the outdoor GNSS signals and forwarding the gain GNSS signals to the indoor are realized, and further, the gain is controlled by additionally arranging a 485 communication unit and transmitting corresponding instructions through a 485 protocol, or the on-off of the ports is controlled, so that the gain GNSS signals meet parameter setting, the remote control of the gain is realized, and the defect that personnel are required to manually adjust the gain on site is overcome.
Drawings
The utility model will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a block diagram illustrating a GNSS repeater system in accordance with the present utility model;
FIG. 2 is a schematic diagram of a processing circuit according to the present utility model;
FIG. 3 is a circuit diagram of a GNSS repeater system of the present utility model;
fig. 4 is a schematic structural view of a switch module in the present utility model;
fig. 5 is a schematic diagram of the structure of the voltage detection terminal in the present utility model.
Detailed Description
Preferred embodiments of the present utility model will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1 to 5, the present utility model provides a preferred embodiment of a GNSS repeater system.
Referring to fig. 1, the GNSS repeater system includes an outdoor input antenna 1, a processing unit 2, a control unit 3, a 485 communication unit 4, and a plurality of indoor output antennas 5, the processing unit 2 is respectively connected with the outdoor input antenna 1 and the plurality of indoor output antennas 5, the control unit 3 is connected with the processing unit 2 through the 485 communication unit 4, and the control unit 3 can be connected with an external terminal through the 485 communication unit 4.
Specifically, the outdoor input antenna 1 is mainly used for receiving outdoor GPS and beidou satellite signals, and as various military and civil aircrafts and spacecrafts are parked in the parking shed and the parking fort, no method is available for receiving GNSS signals in the parking shed and the parking fort, and thus, the outdoor signals need to be received through the outdoor input antenna 1.
Further, the input end of the processing unit 2 is connected with the output end of the outdoor input antenna 1, the output end of the processing unit 2 is connected with the plurality of indoor output antennas 5, and the processing unit 2 is mainly used for amplifying or attenuating the GNSS signals input by the outdoor input antenna 1 and outputting the amplified or attenuated GNSS signals to the plurality of indoor output antennas 5, so as to realize the adjustable program control gain of the external GNSS signals.
Further, the control unit 3 is mainly used for instruction control and data processing, and the control unit 3 is connected with the processing unit 2 to control the processing unit 2 to perform corresponding amplification and attenuation according to the gain value actually required.
Further, the 485 communication unit 4 is mainly used for data transmission and control signal transmission, the processing unit 2 is connected with the control unit 3 through the 485 communication unit 4 to realize remote control gain or on-off of a port, and the control unit 3 can also read information such as various parameters of equipment through the 485 communication unit 4, wherein the control unit 3 can also be connected with an external terminal through the 485 communication unit 4 to realize remote free control, and personnel are not required to manually adjust the gain on site in a physical adjustment mode.
In the prior art, the GNSS transponder system is mostly realized by integrating a power divider and an amplifier, and the system architecture has the problems that the gain is not large enough to support long-distance wiring, the gain cannot be adjusted or is very inconvenient to adjust, and the like; therefore, the aircraft is easy to be interfered by the outside in the starting process of the aircraft and can not work normally; there are also some schemes for manual adjustment by arranging a physical adjustment mechanism on the field, and the schemes are very inconvenient for remote control, and can only continuously monitor the timely manual adjustment of the field condition, and some parameters cannot be preset in advance.
In this embodiment, through setting up in outdoor input antenna 1, indoor output antenna 5 and processing unit 2, realize carrying out gain adjustment and the function of forwarding the GNSS signal after the gain to indoor with outdoor GNSS signal, further, through adding a 485 communication unit 4, utilize 485 protocol transmission corresponding instruction to control the gain, perhaps control the break-make of port, so that the GNSS signal after the gain satisfies parameter setting, realized the remote control of gain, solved the defect that needs personnel manual to go on-the-spot adjustment gain.
In one embodiment, and referring to fig. 2, the processing unit 2 includes a first processing circuit 21, a first matching circuit 22, a second processing circuit 23, and a common dividing circuit 24, where an input end of the first processing circuit 21 is connected to the outdoor input antenna 1, the first matching circuit 22 is disposed between the first processing circuit 21 and the second processing circuit 23, an input end of the common dividing circuit 24 is connected to an output end of the second processing circuit 23, and an output end of the common dividing circuit 24 is connected to the indoor output antennas 5.
Specifically, the processing unit 2 is mainly configured to amplify or attenuate the GNSS signal input by the outdoor input antenna 1, and output the amplified or attenuated GNSS signal to the multiple indoor output antennas 5, where the first processing circuit 21 and the second processing circuit 23 can amplify and attenuate the GNSS signal input by the outdoor input antenna 1 twice, so as to further meet the requirement of signal amplification or attenuation in a link; the first matching circuit 22 is mainly used for reducing loss of signals in the transmission process and reducing influence of reflection of the signals on the system; the common dividing circuit 24 is mainly used for dividing one input signal into multiple output signals so as to transmit the outdoor GNSS signals to multiple sites.
In one embodiment, and referring to fig. 3, the first processing circuit 21 includes a first amplifier 211, a first attenuation chip 212, and a second amplifier 213, where the first amplifier 211 is connected to the outdoor input antenna 1, the first attenuation chip 212 is disposed between the first amplifier 211 and the second amplifier 213, and an output terminal of the second amplifier 213 is connected to an input terminal of the first matching circuit 22.
Specifically, the first amplifier 211 and the second amplifier 213 are both configured to amplify signals, so that the indoor received GNSS signals are strong enough, the first attenuation chip 212 is mainly configured to attenuate the amplified GNSS signals by a small margin, and specific attenuation parameters are transmitted to the control unit 3 through the 485 communication unit 4, and the control unit 3 controls the first attenuation chip 212 to attenuate the signals, so that the output GNSS signal strength meets specific requirements.
In one embodiment, and referring to fig. 3, the second processing circuit 23 includes a second attenuation chip 231 and a third amplifier 232, where the second attenuation chip 231 is disposed between the first matching circuit 22 and the third amplifier 232, and an output terminal of the third amplifier 232 is connected to the common circuit 24.
Specifically, the third amplifier 232 is mainly configured to amplify the signal so that the indoor GNSS signal received is strong enough, the second attenuation chip 231 is mainly configured to attenuate the amplified GNSS signal by a small margin, the specific attenuation parameter is transmitted to the control unit 3 by the 485 communication unit 4, and the first attenuation chip 212 is controlled by the control unit 3 to attenuate the signal, so that the output GNSS signal strength meets a specific requirement, and the second attenuation chip cooperates with the first processing circuit 21 to make the outdoor GNSS signal obtain a gain large enough, so that the indoor GNSS signal meets the required requirement.
In one embodiment, and referring to fig. 2, a second matching circuit 25 is further disposed between the second processing circuit 23 and the common dividing circuit 24.
Specifically, the second matching circuit 25 is mainly configured to reduce loss of the signal during transmission and reduce influence of reflection of the signal on the system.
In one embodiment, and referring to fig. 3, the first matching circuit 22 includes a first resistor 221, a first capacitor 222, and a second capacitor 223, one end of the first resistor 221 is connected to the output terminal of the first processing circuit 21, the other end of the first resistor 221 is connected to the input terminal of the second processing circuit 23, and the first capacitor 222 and the second capacitor 223 are disposed at two ends of the first resistor 221.
Specifically, one end of the first resistor 221 is connected to the output end of the first processing circuit 21 and is grounded, the other end of the first resistor 221 is connected to the input end of the second processing circuit 23 and is grounded, the first capacitor 222 is disposed between one end of the first resistor 221 and the ground, and the second capacitor 223 is disposed between one end of the first resistor 221 and the ground.
In one embodiment, and referring to fig. 3, the second matching circuit 25 includes a second resistor 251, a third capacitor 252, and a fourth capacitor 253, where one end of the second resistor 251 is connected to the output terminal of the second processing circuit 23, the other end of the second resistor 251 is connected to the input terminal of the common dividing circuit 24, and the third capacitor 252 and the fourth capacitor 253 are disposed at two ends of the second resistor 251.
Specifically, one end of the second resistor 251 is connected to the output end of the second processing circuit 23 and is grounded, the other end of the second resistor 251 is connected to the input end of the common circuit 24 and is grounded, the third capacitor 252 is disposed between one end of the second resistor 251 and the ground, and the fourth capacitor 253 is disposed between one end of the second resistor 251 and the ground.
In one embodiment, and referring to fig. 3, the GNSS repeater system includes one outdoor input antenna 1 and four indoor output antennas 5; the public division circuit 24 includes a first public division module 241, a second public division module 242 and a third public division module 243, wherein an input end of the first public division module 241 is connected with an output end of the second processing circuit 23, two output ends of the first public division module are respectively connected with an input end of the second public division module 242 and an input end of the third public division module 243, and output ends of the second public division module 242 and the third public division module 243 are respectively connected with four paths of indoor output antennas 5.
Specifically, in this embodiment, referring to fig. 3, a scheme of one-way input and four-way output is adopted, the common dividing circuit 24 adopts two-way common dividing, the input end of the first common dividing module 241 is connected with the output end of the second processing circuit 23 to obtain the GNSS signals after gain, the two output ends of the first common dividing module 241 are respectively connected with the input end of the second common dividing module 242 and the input end of the third common dividing module 243 to divide the GNSS signals after gain into two ways for output, and the second common dividing module 242 and the third common dividing module 243 again divide the two ways of GNSS signals into two ways, and finally output the four ways of GNSS signals and transmit the GNSS signals through the four ways of indoor output antennas 5 respectively.
In one embodiment, referring to fig. 4, multiple indoor output antennas 5 are connected to the control unit 3, and a switch module 6 is disposed between the control unit 3 and each indoor output antenna 5.
Specifically, referring to fig. 4, the switch module 6 is mainly configured to implement a power-on or power-off function of the port, and the switch module 6 may use a triode switch to control the base of the triode through the control unit 3, so as to control the on-off of the triode, thereby implementing power-on or power-off control of the port.
In one embodiment, and referring to fig. 5, a voltage detecting terminal 7 is disposed between the control unit 3 and each indoor output antenna 5.
Specifically, and referring to fig. 5, the voltage detection terminal 7 is mainly configured to determine the state of the port, and in this embodiment, the control unit 3 may obtain the state of the port by setting a voltage dividing resistor, and reading the voltage value of each port through the voltage dividing resistor.
The foregoing description of the preferred embodiments of the present utility model is not intended to limit the scope of the utility model, but rather is intended to cover all modifications and variations within the scope of the present utility model as defined in the appended claims.
Claims (10)
1. A GNSS forwarding system, characterized by: the GNSS forwarding system comprises an outdoor input antenna, a processing unit, a control unit, 485 communication units and a plurality of paths of indoor output antennas, wherein the processing unit is respectively connected with the outdoor input antenna and the plurality of paths of indoor output antennas to carry out gain adjustment on outdoor GNSS signals, the control unit is connected with the processing unit through the 485 communication units so as to carry out parameter control on the processing unit according to instructions, and the control unit can be connected with an external terminal through the 485 communication units so as to acquire external instructions.
2. The GNSS forwarding system of claim 1 wherein: the processing unit comprises a first processing circuit, a first matching circuit, a second processing circuit and a public branch circuit, wherein the input end of the first processing circuit is connected with the outdoor input antenna, the first matching circuit is arranged between the first processing circuit and the second processing circuit, the input end of the public branch circuit is connected with the output end of the second processing circuit, and the output end of the public branch circuit is connected with a plurality of indoor output antennas.
3. The GNSS forwarding system of claim 2 wherein: the first processing circuit comprises a first amplifier, a first attenuation chip and a second amplifier, wherein the first amplifier is connected with the outdoor input antenna, the first attenuation chip is arranged between the first amplifier and the second amplifier, and the output end of the second amplifier is connected with the input end of the first matching circuit.
4. The GNSS forwarding system of claim 2 wherein: the second processing circuit comprises a second attenuation chip and a third amplifier, the second attenuation chip is arranged between the first matching circuit and the third amplifier, and the output end of the third amplifier is connected with the common division circuit.
5. The GNSS forwarding system of claim 2 wherein: and a second matching circuit is further arranged between the second processing circuit and the public division circuit.
6. The GNSS forwarding system of claim 2 wherein: the first matching circuit comprises a first resistor, a first capacitor and a second capacitor, one end of the first resistor is connected with the output end of the first processing circuit, the other end of the first resistor is connected with the input end of the second processing circuit, and the first capacitor and the second capacitor are arranged at two ends of the first resistor.
7. The GNSS forwarding system of claim 5 wherein: the second matching circuit comprises a second resistor, a third capacitor and a fourth capacitor, one end of the second resistor is connected with the output end of the second processing circuit, the other end of the second resistor is connected with the input end of the public branch circuit, and the third capacitor and the fourth capacitor are arranged at two ends of the second resistor.
8. The GNSS forwarding system of claim 2 wherein: the GNSS forwarding system comprises one path of outdoor input antenna and four paths of indoor output antennas; the public branch circuit comprises a first public branch module, a second public branch module and a third public branch module, wherein the input end of the first public branch module is connected with the output end of the second processing circuit, the two output ends of the first public branch module are respectively connected with the input end of the second public branch module and the input end of the third public branch module, and the output ends of the second public branch module and the third public branch module are respectively connected with four paths of indoor output antennas.
9. The GNSS forwarding system of claim 1 wherein: the multiple indoor output antennas are connected with the control unit, and a switch module is arranged between the control unit and each indoor output antenna.
10. The GNSS forwarding system of claim 9 wherein: and a voltage detection end is arranged between the control unit and each indoor output antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320288080.XU CN220120995U (en) | 2023-02-09 | 2023-02-09 | GNSS forwarding system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320288080.XU CN220120995U (en) | 2023-02-09 | 2023-02-09 | GNSS forwarding system |
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| Publication Number | Publication Date |
|---|---|
| CN220120995U true CN220120995U (en) | 2023-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320288080.XU Active CN220120995U (en) | 2023-02-09 | 2023-02-09 | GNSS forwarding system |
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|---|---|
| CN (1) | CN220120995U (en) |
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- 2023-02-09 CN CN202320288080.XU patent/CN220120995U/en active Active
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