CN203642936U - Digit delay and amplitude program control technology-based altitude simulation module - Google Patents
Digit delay and amplitude program control technology-based altitude simulation module Download PDFInfo
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- CN203642936U CN203642936U CN201320793606.6U CN201320793606U CN203642936U CN 203642936 U CN203642936 U CN 203642936U CN 201320793606 U CN201320793606 U CN 201320793606U CN 203642936 U CN203642936 U CN 203642936U
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- 238000004088 simulation Methods 0.000 title claims abstract description 33
- 238000005516 engineering process Methods 0.000 title claims abstract description 25
- 238000006243 chemical reaction Methods 0.000 claims abstract description 30
- 239000003990 capacitor Substances 0.000 description 31
- 238000012360 testing method Methods 0.000 description 10
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- 238000010586 diagram Methods 0.000 description 7
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- 238000012423 maintenance Methods 0.000 description 4
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- 238000011160 research Methods 0.000 description 2
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- 230000035945 sensitivity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/882—Radar or analogous systems specially adapted for specific applications for altimeters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4052—Means for monitoring or calibrating by simulation of echoes
- G01S7/406—Means for monitoring or calibrating by simulation of echoes using internally generated reference signals, e.g. via delay line, via RF or IF signal injection or via integrated reference reflector or transponder
- G01S7/4065—Means for monitoring or calibrating by simulation of echoes using internally generated reference signals, e.g. via delay line, via RF or IF signal injection or via integrated reference reflector or transponder involving a delay line
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- Circuits Of Receivers In General (AREA)
Abstract
The utility model discloses a digit delay and amplitude program control technology-based altitude simulation module which comprises an input amplitude limiting circuit and the like. A system control terminal controls a control signal of a field programmable gate array (FPGA) chip generating module via a bus; an output end of the input amplitude limiting circuit is connected to a first input end of a down-conversion circuit; an output end of the down-conversion circuit is connected to an input end of an analog/digital conversion circuit; an output end of the analog/digital conversion circuit is connected to an input end of an FPGA circuit; an output end of the analog/digital conversion circuit is connected to a first input end of an up-conversion circuit; an output end of the up-conversion circuit is connected to an input end of an amplitude program control circuit; a first output end of a local oscillator source circuit is connected to a second input end of the down-conversion circuit; a second output end of the local oscillator source circuit is connected to a second input end of the up-conversion circuit. According to the altitude simulation module, a simulation function of any height can be realized in a wide range according to the user requirements, and the practicability of the module is enhanced.
Description
Technical field
The utility model relates to a kind of altitude simulation module, particularly relates to a kind of altitude simulation module based on digital delay and amplitude program control technology.
Background technology
In radio altimeter test macro, the altimetry precision of radio altimeter is measured and sensitivity measure is wherein important ingredient.Its serviceability quality directly has influence on the serviceability of radio altimeter test macro.
In order to weigh altimetry precision and the sensitivity index of radio altimeter, radio altimeter test macro often adopts delay cable to build altitude simulation system in conjunction with step attenuator or special altitude simulation equipment completes.Building altitude simulation system needs tester to have higher specialized capability, and testing efficiency is low, and human factor is larger on measuring accuracy impact; Special altitude simulation equipment is mostly equipment for customizing, is made up of in conjunction with control program multiple typical lag lines and radio-frequency (RF) switch, and volume is large, cost is high, and upgrading is difficult, and can not cover the height measurement range of radio altimeter.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of altitude simulation module based on digital delay and amplitude program control technology, it is for radio altimeter test macro, it adopts digital delay techniques and amplitude program control technology, can according to user need to be on a large scale in realize the analog functuion of arbitrary height, compared with adopting the altitude simulation module of hardware delay line design, altitude simulation module volume based on digital delay and amplitude program control technology is little, integrated level is high, cost is low, applied widely, strengthened the practicality of module.
The utility model solves above-mentioned technical matters by following technical proposals: a kind of altitude simulation module based on digital delay and amplitude program control technology, it is characterized in that, it comprises an input saturation circuit, a lower frequency changer circuit, an analog to digital conversion circuit, a FPGA circuit, a D/A converting circuit, a up-converter circuit, an amplitude programme control circut and a local vibration source circuit, system control terminal is by the control signal of total line traffic control fpga chip generation module, the output terminal of input saturation circuit is connected to the first input end of lower frequency changer circuit, the output terminal of lower frequency changer circuit is connected to the input end of analog to digital conversion circuit, the output terminal of analog to digital conversion circuit is connected to the input end of FPGA circuit, the output terminal of FPGA circuit is connected to the input end of D/A converting circuit, the output terminal of D/A converting circuit is connected to the first input end of up-converter circuit, the output terminal of up-converter circuit is connected to the input end of amplitude programme control circut, the first output terminal of local vibration source circuit is connected to the second input end of lower frequency changer circuit, the second output terminal of local vibration source circuit is connected to the second input end of up-converter circuit.
Preferably, analog-digital conversion circuit as described, FPGA circuit and D/A converting circuit form a digital delay function unit.
Preferably, described amplitude programme control circut comprises the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, power amplifier, the first attenuator, the second attenuator, the 3rd attenuator, the 4th attenuator, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, the 7th electric capacity, the 8th electric capacity, the 9th electric capacity, the tenth electric capacity, the 11 electric capacity, inductance, the first resistance is in parallel with the 3rd resistance, and the second resistance is connected between the first resistance and the 3rd resistance, inductance, the second electric capacity, in parallel between the 3rd electric capacity three, the 4th resistance is connected between inductance and the second electric capacity, and the first electric capacity is connected between the second resistance and power amplifier, the 4th electric capacity, inductance is all connected with power amplifier, the 5th resistance is in parallel with the 7th resistance, the 6th resistance is connected between the 5th resistance and the 7th resistance, the first attenuator is connected between the 6th resistance and the 6th electric capacity, and the second attenuator is connected between the 6th electric capacity and the 8th electric capacity, and the 3rd attenuator is connected between the 8th electric capacity and the tenth electric capacity, the 5th electric capacity is connected with the first attenuator, the 7th electric capacity is connected with the second attenuator, and the 9th electric capacity is connected with the 3rd attenuator, the tenth electric capacity, the 11 electric capacity is all connected with the 4th attenuator.
Positive progressive effect of the present utility model is: the utility model adopts digital delay techniques and amplitude program control technology, can according to user need to be on a large scale in realize the analog functuion of arbitrary height, compared with adopting the altitude simulation module of hardware delay line design, altitude simulation module volume based on digital delay and amplitude program control technology is little, integrated level is high, cost is low, applied widely, can meet the demand of scientific research emulation, Product Acceptance Review and the maintenance maintenance of C-band radio altimeter.The utility model can be changed simulated altitude according to demand, and the test function of enhanced radio height indicator test macro improves testing efficiency, the range of application of extending radio height indicator test macro.
Brief description of the drawings
Fig. 1 is the schematic diagram of the altitude simulation module of the utility model based on digital delay and amplitude program control technology.
Fig. 2 is the schematic diagram of digital delay function unit in the utility model.
Fig. 3 is the schematic diagram of amplitude programme control circut in the utility model.
Fig. 4 is the schematic diagram of lower frequency changer circuit in the utility model.
Fig. 5 is the schematic diagram of up-converter circuit in the utility model.
Embodiment
Provide the utility model preferred embodiment below in conjunction with accompanying drawing, to describe the technical solution of the utility model in detail.
Refer to Fig. 1, the altitude simulation module of the utility model based on digital delay and amplitude program control technology comprises an input saturation circuit, a lower frequency changer circuit, an analog to digital conversion circuit, a FPGA circuit, a D/A converting circuit, a up-converter circuit, an amplitude programme control circut and a local vibration source circuit, system control terminal is by the control signal of total line traffic control fpga chip generation module, the output terminal of input saturation circuit is connected to the first input end of lower frequency changer circuit, the output terminal of lower frequency changer circuit is connected to the input end of analog to digital conversion circuit, the output terminal of analog to digital conversion circuit is connected to the input end of FPGA circuit, the output terminal of FPGA circuit is connected to the input end of D/A converting circuit, the output terminal of D/A converting circuit is connected to the first input end of up-converter circuit, the output terminal of up-converter circuit is connected to the input end of amplitude programme control circut, amplitude programme control circut output radiofrequency signal, the first output terminal of local vibration source circuit is connected to the second input end of lower frequency changer circuit, the second output terminal of local vibration source circuit is connected to the second input end of up-converter circuit.
Altitude simulation module based on digital delay and amplitude program control technology be mainly by by input radiofrequency signal amplitude limiting processing, down-convert to again intermediate-freuqncy signal, transfer digital signal to by analog to digital conversion circuit, digital signal is exported after FPGA inside circuit completes delay process, transfer simulating signal to by D/A converting circuit, up-conversion reverts to radiofrequency signal again, output after amplitude is program control.Two large key elements of simulated altitude are signal lag and signal attenuation, and in the path of the altitude simulation module based on digital delay and amplitude program control technology, signal lag is realized by FPGA circuit, and signal attenuation realizes by input saturation circuit and amplitude programme control circut.System control terminal is by the control signal of total line traffic control fpga chip generation module, above-mentioned input saturation circuit completes the amplitude limitation of input radio frequency signal, in order to avoid high-power signal damages subsequent conditioning circuit, the radiofrequency signal of amplitude limit is down-converted to intermediate-freuqncy signal by lower frequency changer circuit, analog to digital conversion circuit transfers intermediate-freuqncy signal to digital signal, FPGA circuit completes the delay of digital signal and the control signal of other circuit in module is provided, D/A converting circuit transfers the digital signal after postponing to intermediate-freuqncy signal, revert to radiofrequency signal by up-converter circuit again, after amplitude programme control circut, export, local vibration source circuit provides local oscillation signal for up-converter circuit and lower frequency changer circuit.
Refer to Fig. 2, analog to digital conversion circuit, FPGA circuit and D/A converting circuit form a digital delay function unit; System control terminal is by the control signal of total line traffic control fpga chip generation module, the output terminal of above-mentioned analog to digital conversion circuit is connected to the input end of FPGA circuit, the output terminal of FPGA circuit is connected to the input end of D/A converting circuit, and the output terminal output of D/A converting circuit realizes the digital signal of time delay.Analog to digital conversion circuit in digital delay function unit is mainly made up of frequency overlapped-resistable filter, driving amplifier and analog to digital converter, FPGA main circuit will be made up of fpga chip, and D/A converting circuit is mainly made up of digital to analog converter and smoothing filter power amplifier.Digital delay function unit is mainly to transfer analog if signal to digital signal, digital signal is exported after digital gate circuit and jumbo buffer buffer memory, realize the delay process of digital signal, the digital signal after time delay transfers analog if signal output to by digital-to-analog conversion again.
Refer to Fig. 3, amplitude programme control circut comprises the first resistance R 301, the second resistance R 302, the 3rd resistance R 303, the 4th resistance R 304, the 5th resistance R 305, the 6th resistance R 306, the 7th resistance R 307, power amplifier N301, the first attenuator N302, the second attenuator N303, the 3rd attenuator N304, the 4th attenuator N305, the first capacitor C 301, the second capacitor C 302, the 3rd capacitor C 303, the 4th capacitor C 304, the 5th capacitor C 305, the 6th capacitor C 306, the 7th capacitor C 307, the 8th capacitor C 308, the 9th capacitor C 309, the tenth capacitor C 310, the 11 capacitor C 311, inductance L 301, the first resistance R 301 are in parallel with the 3rd resistance R 303, and the second resistance R 302 is connected between the first resistance R 301 and the 3rd resistance R 303, inductance L 301, the second capacitor C 302, in parallel between the 3rd capacitor C 303 threes, the 4th resistance R 304 is connected between inductance L 301 and the second capacitor C 302, and the first capacitor C 301 is connected between the second resistance R 302 and power amplifier N301, the 4th capacitor C 304, inductance L 301 is all connected with power amplifier N301, the 5th resistance R 305 is in parallel with the 7th resistance R 307, the 6th resistance R 306 is connected between the 5th resistance R 305 and the 7th resistance R 307, the first attenuator N302 is connected between the 6th resistance R 306 and the 6th capacitor C 306, the second attenuator N303 is connected between the 6th capacitor C 306 and the 8th capacitor C 308, the 3rd attenuator N304 is connected between the 8th capacitor C 308 and the tenth capacitor C 310, the 5th capacitor C 305 is connected with the first attenuator N302, the 7th capacitor C 307 is connected with the second attenuator N303, the 9th capacitor C 309 is connected with the 3rd attenuator N304, the tenth capacitor C 310, the 11 capacitor C 311 is all connected with the 4th attenuator N305.
The first resistance R 301, the second resistance R 302, the 3rd resistance R 303 form a Π type resistance decrement network, and the amplitude of the radiofrequency signal that is used for reducing input range programme control circut, in order to avoid the output saturation of power amplifier N301; The 5th resistance R 305, the 6th resistance R 306, the 7th resistance R 307 form the 2nd Π type resistance decrement network, together with power amplifier N301, are used for the fixing Insertion Loss of adjusting range programme control circut; The first capacitor C 301, the 4th capacitor C 304, the 6th capacitor C 306, the 8th capacitor C 308, the tenth capacitor C 310 are all capacitance, can remove the DC component of radiofrequency signal; The first attenuator N302, the second attenuator N303, the 3rd attenuator N304, the 4th attenuator N305 are programmable attenuator, and each only all realizes the program control decay of 31.5dB, and decay stepping is 0.5dB; The attenuation control signal of programmable attenuator is provided by FPGA circuit.The damping capacity of two Π type resistance decrement networks can according to altitude simulation module totally need adjust; Programmable attenuator adopts serially concatenated mode, and the damping capacity sum that overall attenuation is each programmable attenuator can be determined according to the program control scope of altitude simulation module the quantity of programmable attenuator.
Refer to Fig. 4, this is the schematic diagram of lower frequency changer circuit of the present utility model.Whole lower frequency changer circuit comprises first frequency mixer, the first wave filter, the second wave filter, a fixed ampllitude amplifier and a first four-divider composition.4.2GHz～4.4GHz radiofrequency signal of input and the local oscillation signal of 4.1GHz are after the first frequency mixer and the first wave filter, transfer the radiofrequency signal of 100MHz～300MHz to, adjust the amplitude of signal by fixed ampllitude amplifier, make signal amplitude meet the incoming level scope of the first four-divider, signal is after four frequency divisions, transfer the intermediate-freuqncy signal of 25MHz～75MHz to, after the second filter filtering, export.
Refer to Fig. 5, this is the schematic diagram of up-converter circuit of the present utility model.Whole up-converter circuit comprises second frequency mixer, the 3rd wave filter, the 4th wave filter, a low noise amplifier and a second quadrupler composition.25MHz～75MHz intermediate-freuqncy signal of input transfers the radiofrequency signal of 100MHz～300MHz to after the second quadrupler and the 4th wave filter, again after low noise amplifier as the input signal of frequency mixer, transfer the radiofrequency signal of 4.2GHz～4.4GHz to the local oscillation signal mixing of 4.1GHz, after the 3rd filter filtering, export.
The input saturation circuit of the altitude simulation module of the utility model based on digital delay and amplitude program control technology, by being mainly that coaxial attenuator VAT-20 by MINI company forms, can directly be purchased, so repeat no more on market.
The analog to digital conversion circuit of the altitude simulation module of the utility model based on digital delay and amplitude program control technology is by being mainly that 14 high speed analog-to-digital conversion chip ADS6149 and peripheral circuit thereof by TI company forms, can realize according to the reference circuit of ADS6149, so repeat no more.
The FPGA circuit of the altitude simulation module of the utility model based on digital delay and amplitude program control technology is by being mainly that fpga chip EP2S60F484 and peripheral circuit thereof by ALTERA company forms, can realize according to the reference circuit of EP2S60F484, so repeat no more.
The D/A converting circuit of the altitude simulation module of the utility model based on digital delay and amplitude program control technology is by being mainly that 14 high speed analog-to-digital conversion chip DAC5675A and peripheral circuit thereof by TI company forms, can realize according to the reference circuit of DAC5675A, so repeat no more.
The local vibration source circuit of the altitude simulation module of the utility model based on digital delay and amplitude program control technology, by being mainly that phase-locked loop chip ADF4106 and peripheral circuit thereof by ADI company forms, can be realized according to the reference circuit of ADF4106, so repeat no more.
Module of the present utility model is for radio altimeter test macro, module has been debugged separately, and can trouble-free operation in system, it adopts digital delay techniques and amplitude program control technology, can according to user need to be on a large scale in realize the analog functuion of arbitrary height, compared with adopting the altitude simulation module of hardware delay line design, altitude simulation module volume based on digital delay and amplitude program control technology is little, integrated level is high, cost is low, applied widely, can meet the scientific research emulation of C-band radio altimeter, the demand of Product Acceptance Review and maintenance maintenance.
Above-described specific embodiment; technical matters, technical scheme and beneficial effect to solution of the present utility model further describe; institute is understood that; the foregoing is only specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any amendment of making, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (3)
1. the altitude simulation module based on digital delay and amplitude program control technology, it is characterized in that, it comprises an input saturation circuit, a lower frequency changer circuit, an analog to digital conversion circuit, a FPGA circuit, a D/A converting circuit, a up-converter circuit, an amplitude programme control circut and a local vibration source circuit, system control terminal is by the control signal of total line traffic control fpga chip generation module, the output terminal of input saturation circuit is connected to the first input end of lower frequency changer circuit, the output terminal of lower frequency changer circuit is connected to the input end of analog to digital conversion circuit, the output terminal of analog to digital conversion circuit is connected to the input end of FPGA circuit, the output terminal of FPGA circuit is connected to the input end of D/A converting circuit, the output terminal of D/A converting circuit is connected to the first input end of up-converter circuit, the output terminal of up-converter circuit is connected to the input end of amplitude programme control circut, the first output terminal of local vibration source circuit is connected to the second input end of lower frequency changer circuit, the second output terminal of local vibration source circuit is connected to the second input end of up-converter circuit.
2. the altitude simulation module based on digital delay and amplitude program control technology as claimed in claim 1, is characterized in that, analog-digital conversion circuit as described, FPGA circuit and D/A converting circuit form a digital delay function unit.
3. the altitude simulation module based on digital delay and amplitude program control technology as claimed in claim 1, is characterized in that, described amplitude programme control circut comprises the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, power amplifier, the first attenuator, the second attenuator, the 3rd attenuator, the 4th attenuator, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, the 7th electric capacity, the 8th electric capacity, the 9th electric capacity, the tenth electric capacity, the 11 electric capacity, inductance, the first resistance is in parallel with the 3rd resistance, and the second resistance is connected between the first resistance and the 3rd resistance, inductance, the second electric capacity, in parallel between the 3rd electric capacity three, the 4th resistance is connected between inductance and the second electric capacity, and the first electric capacity is connected between the second resistance and power amplifier, the 4th electric capacity, inductance is all connected with power amplifier, the 5th resistance is in parallel with the 7th resistance, the 6th resistance is connected between the 5th resistance and the 7th resistance, the first attenuator is connected between the 6th resistance and the 6th electric capacity, and the second attenuator is connected between the 6th electric capacity and the 8th electric capacity, and the 3rd attenuator is connected between the 8th electric capacity and the tenth electric capacity, the 5th electric capacity is connected with the first attenuator, the 7th electric capacity is connected with the second attenuator, and the 9th electric capacity is connected with the 3rd attenuator, the tenth electric capacity, the 11 electric capacity is all connected with the 4th attenuator.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106533456A (en) * | 2016-11-21 | 2017-03-22 | 北京振兴计量测试研究所 | Double-waveband equivalent height simulation apparatus |
| CN108414988A (en) * | 2018-03-09 | 2018-08-17 | 北京润科通用技术有限公司 | A kind of digital delay method and device based on FPGA |
| CN109799489A (en) * | 2018-09-14 | 2019-05-24 | 成都众志天成科技有限公司 | A kind of altimeter simulator and its analogy method |
| CN112485771A (en) * | 2020-12-09 | 2021-03-12 | 南京长峰航天电子科技有限公司 | Altimeter simulator and simulation method |
| CN114779194A (en) * | 2022-06-21 | 2022-07-22 | 成都飞亚航空设备应用研究所有限公司 | Radio altimeter simulator |
-
2013
- 2013-12-04 CN CN201320793606.6U patent/CN203642936U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106533456A (en) * | 2016-11-21 | 2017-03-22 | 北京振兴计量测试研究所 | Double-waveband equivalent height simulation apparatus |
| CN108414988A (en) * | 2018-03-09 | 2018-08-17 | 北京润科通用技术有限公司 | A kind of digital delay method and device based on FPGA |
| CN108414988B (en) * | 2018-03-09 | 2020-06-05 | 北京润科通用技术有限公司 | Digital delay method and device based on FPGA |
| CN109799489A (en) * | 2018-09-14 | 2019-05-24 | 成都众志天成科技有限公司 | A kind of altimeter simulator and its analogy method |
| CN109799489B (en) * | 2018-09-14 | 2022-06-14 | 成都众志天成科技有限公司 | Altimeter simulator and simulation method thereof |
| CN112485771A (en) * | 2020-12-09 | 2021-03-12 | 南京长峰航天电子科技有限公司 | Altimeter simulator and simulation method |
| CN114779194A (en) * | 2022-06-21 | 2022-07-22 | 成都飞亚航空设备应用研究所有限公司 | Radio altimeter simulator |
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