CN106679694A - TACAN beacon simulator air-to-air response delayed measurement precision calibration apparatus and method - Google Patents
TACAN beacon simulator air-to-air response delayed measurement precision calibration apparatus and method Download PDFInfo
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- CN106679694A CN106679694A CN201611174296.4A CN201611174296A CN106679694A CN 106679694 A CN106679694 A CN 106679694A CN 201611174296 A CN201611174296 A CN 201611174296A CN 106679694 A CN106679694 A CN 106679694A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C25/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
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Abstract
The invention provides a TACAN beacon simulator air-to-air response delayed measurement precision calibration apparatus and method. A computer controls a TACAN beacon simulator to output a distance measurement inquiry pulse, at the same time, the TACAN beacon simulator outputs a distance measurement inquiry trigger signal, which triggers a vector signal generator to output a distance measurement response pulse; and the distance measurement response pulse is subjected to power amplification, and the obtained pulse is taken as a distance measurement response signal of the TACAN beacon simulator, an oscilloscope measures the time difference between the distance measurement inquiry signal and the distance measurement response signal, the time difference is compared with the air-to-air response delayed measurement value measured by the TACAN beacon simulator, and a cable length between the TACAN beacon simulator and a circulator is subjected to time compensation to obtain the TACAN simulator air-to-air response delayed measurement precision. The apparatus and method is good in traceability, high in measurement accuracy, and good in operability and allows the air-to-air measurement precision of airborne equipment to be greatly improved.
Description
Technical field
The present invention relates to tacan beacon simulator (TACAN Beason Simulator), for tacan beacon simulator
The calibration of air-air airborne equipment delay precision.
Background technology
Tacan beacon simulator is the special equipment check, test, calibrating Tacan airborne equipment technical indicator, with ground-
Empty and air-air two kinds of mode of operations, ground-air pattern can simulate position problems of the aircraft relative to surface beacon, air-air pattern
Relative position between then simulating aircraft in the air, working frequency range is 1025~1150MHz, identical with ground-air range measurement principle,
Using inquiry response formula pulse ranging, wing plane sends distance measurement inquiring signal as challenger, and leader receives survey as transponder
After request signal, row decoding is entered first, through constant time lag (X patterns are 62 μ s, and Y mode is 74 μ s), sends transponder pulse,
As the wing plane of challenger the transponder pulse that leader sends is demodulated, is decoded, by measuring interrogation pulse and answer signal
Between time difference, while deducting the fixed delay of transponder, just can calculate the distance between leader and wing plane, computing formula is such as
Under：
T：Wing plane sends request signal and receives the time interval of leader answer signal；
T0：The constant time lag of leader (transponder)；
C：Radio propagation speed, equal to 3 × 108m/s。
At present, more used in research and production is China Electronics Technology Group Corporation No. 20 Research Institute and Baoji
The Tacan simulator that 765 factories develop, and the DTS-200 types of aico republic electrnics companies of the U.S., these moulds
Intend device in air-air working method, the method for testing of imperfect airborne equipment Time delay measurement, to airborne equipment it is air-air away from
From calibration tape come certain deviation.
The content of the invention
In order to overcome the deficiencies in the prior art, the present invention to provide a kind of demarcation Tacan signal simulator air-air response time delay
The device of certainty of measurement.
The technical solution adopted for the present invention to solve the technical problems is：A kind of air-air response of Tacan signal simulator is prolonged
When certainty of measurement calibration device, computer controls tacan beacon simulator exports the distance measurement inquiring pulse under air-air pattern, Jing rings
Shape device accesses oscillograph, for request signal measurement, while tacan beacon simulator output distance measurement inquiring trigger, makees all the way
For the time reference of oscilloscope measurement, another road triggering vector signal generator output range finding transponder pulse；Range finding transponder pulse
Jing after power amplification, by directional coupler, Jing circulators all the way are coupled out, the range finding response as tacan beacon simulator is believed
Number, it is coupled out another road and accesses oscillograph, for answer signal measurement；Oscilloscope measurement goes out distance measurement inquiring signal with range finding response
Time difference between signal, the air-air response delay measurements obtained with tacan beacon simulator measurement are compared, and by tower
Cable length carries out time bias between Kang Xinbiao simulators and circulator, obtains the air-air response Time delay measurement of simulator Tacan
Precision.
The present invention also provides a kind of Tacan signal simulator air-air response Time delay measurement Precision calibration method, including following
Step：
Step 1, measurement Tacan signal simulator radio frequency interface obtain cable equivalent to the cable length L between circulator
Time delayWherein C=300m/ μ s, are radio propagation speed；
Step 2, the air-air pattern radio frequency channel of the Tacan function of Tacan signal simulator are in the range of 1X~126X and 1Y~126Y
Arrange, output power levels are -10dBm；
Step 3, vector signal generator power output are set to 18dBm, and output frequency is set to be simulated with Tacan signal
The corresponding answer signal frequency of device；
The range finding of step 4, the distance measurement inquiring signal sent to Tacan signal simulator and vector signal generator output should
Answering signal carries out Hilbert conversion, obtains the envelope of distance measurement inquiring signal and range finding answer signal；
Step 5, adjustment vector signal generator Time delay, obtain distance measurement inquiring signal with range finding answer signal when
Between it is poor, for X radio frequency channels be 62 μ s-T0, for Y radio frequency channels are 74 μ s-T0, wherein, distance measurement inquiring signal and range finding answer signal when
Between measurement point be the half-amplitude point of first pulse envelope；
Step 6, measurement Tacan signal simulator airborne equipment delay measurements T, then Tacan signal simulator airborne equipment
Time delay measurement precision is Δ T=T-62 μ S+T for X radio frequency channels0, for Y radio frequency channels are Δ T=T-74 μ S+T0。
The invention has the beneficial effects as follows：With traceability it is good, certainty of measurement is high, strong operability the characteristics of, solve Tacan
The calibration problem of the air-air response Time delay measurement precision of signal simulator, is applied to the air-air response time delay essence of simulator airborne equipment
The calibration of degree, is greatly improved the air-air range accuracy of airborne equipment.
Description of the drawings
Fig. 1 is the air-air response Time delay measurement Precision calibration device block diagram of simulator Tacan.
Specific embodiment
With reference to the accompanying drawings and examples the present invention is further described, and the present invention includes but are not limited to following enforcements
Example.
GJB914-90《Tacan system semaphore request and method of testing》Regulation is air-air to be apart from the answering delay time：X moulds
Formula is 62 ± 0.1 μ s, and Y mode is 74 ± 0.1 μ s, that is to say, that airborne equipment launches interrogation pulse to rear, in X mode pulses pair
62 μ s after timing point, to 74 μ s after timing point, when antenna receives transponder pulse, distance is designated as 0km for Y mode pulse.
To the incomplete present situation of the air-air response Time delay measurement precision calibration method of Tacan signal simulator, based on Tacan it is empty-
Empty range measurement principle, the present invention is proposed and demarcates the air-air response Time delay measurement precision of Tacan signal simulator using all purpose instrument
Method, content is as follows：
1. the air-air response Time delay measurement Precision calibration device of Tacan signal simulator is as shown in Figure 1.
Tacan beacon simulator is set to the air-air pattern of Tacan, exports air-air distance measurement inquiring pulse, and Jing circulators are accessed
Oscillograph, measures for request signal, while the distance measurement inquiring trigger of simulator output, all the way as oscilloscope measurement
Time reference, another road triggering vector signal generator output range finding transponder pulse；Vector signal generator output range finding response
Pulse Jing power amplifications, by directional coupler Jing circulators all the way, used as the range finding answer signal of simulator, another road is accessed
Oscillograph, for answer signal measurement.The time difference gone out between request signal and answer signal by oscilloscope measurement, the time
The air-air response delay measurements that obtain with simulator measurement of difference are compared, and by simulator radio frequency interface and circulator it
Between cable length carry out time bias, so that it may obtain the air-air response Time delay measurement precision of simulator Tacan.Here, computer leads to
Cross router and realize that to Tacan signal waveform modelling and control the time data of oscilloscope measurement can be stored in meter by router
In calculation machine, just with subsequent analysis, calculating.
2. measure analog device radio frequency interface is to cable between circulator (L3) length L, then the Equivalent time delay of the cable
ForWherein C=300m/ μ s, are radio propagation speed.
3. the air-air pattern radio frequency channel of simulator Tacan function can be arranged in the range of 1X~126X and 1Y~126Y, output work
Rate level is -10dBm.
4. vector signal source power output is set to 18dBm, and output frequency is set to answer signal corresponding with simulator
Frequency.
5. the request signal that pair channel oscilloscope 1 (CH1) institute connection simulator sends is believed with passage 2 (CH2) connected vector
The answer signal of number source output, using the math functions of digital oscilloscope Hilbert conversion is carried out, and obtains simulator output inquiry
Signal and vector signal source export the envelope of answer signal.
6. the Time delay of vector signal source, request signal and the vector signal source of passage 2 of measuring oscilloscope passage 1 are adjusted
The time difference of the answer signal of output, for X radio frequency channels are 62 μ s-T0, for Y radio frequency channels are 74 μ s-T0, wherein, request signal and should
The time measurement point for answering signal is the half-amplitude point of first pulse envelope.
7. now simulator airborne equipment delay measurements are T for observation, then simulator airborne equipment Time delay measurement precision pair
In X radio frequency channels be Δ T=T-62 μ S+T0, for Y radio frequency channels are Δ T=T-74 μ S+T0。
Based on the air-air range measurement principle of Tacan, it is contemplated that Project Realization, embodiments of the invention are proposed and adopt universal test
The method of the air-air response Time delay measurement precision of instrumental calibration Tacan signal simulator.
Step one：Build the air-air response delay precision test environment of Tacan signal simulator
Test environment according to the dynamic range of Tacan signal simulator receiving circuit as shown in figure 1, wherein can select appropriate
L-band power amplifier.
Simulator radio frequency interface Jing circulators access oscillographic passage 1 (CH1), that is, simulator output range finding is ask
Ask that signal accesses oscillograph.
Simulator inquires that trigger is synchronous with the distance measurement inquiring signal time of output, is divided into two-way, uses all the way
Transponder pulse signal is produced in triggering vector signal source, the transponder pulse signal of vector signal source output accesses oscillographic passage
2 (CH2), access channel oscilloscope 3 (CH3), as the synchronous base of oscilloscope measurement with another road of the measurement of answer signal
Signal.
Here, it is to reduce calibrated error, cable (L1) is consistent with the length of cable (L2).
Step 2：Measure analog device radio frequency interface calculates its equivalent delay to cable length between circulator
Simulator radio frequency interface is that L units are m to cable between circulator (L3) length, then the equivalent time of the cable prolongs
Chi WeiWherein C=300m/ μ s, are radio propagation speed.
Step 3：Simulator is arranged
The air-air pattern radio frequency channel of simulator can be arranged in the range of 1X~126X and 1Y~126Y, output power levels for-
10dBm。
Step 4：Vector signal source is arranged
Vector signal source power output is set to 18dBm, and output frequency is set to answer signal frequency corresponding with simulator
Rate.
Step 5：Arrow is connected with passage 2 (CH2) to the request signal that channel oscilloscope 1 (CH1) institute connection simulator sends
The answer signal of amount signal source output, using the math functions of digital oscilloscope Hilbert conversion is carried out, and obtains simulator output
Request signal and vector signal source export the envelope of answer signal.
Note：Hilbert conversion is a kind of method that time domain real signal is changed into into time domain analytic signal, and Hilbert converts institute
The real part of the analytic signal for obtaining is real signal itself, and imaginary part is the Hilbert conversion of real signal, and the amplitude of analytic signal is
The envelope of real signal.
Step 6：The Time delay of adjustment vector signal source, the request signal envelope and passage 2 for making channel oscilloscope 1 is sweared
The time difference of the answer signal envelope of amount signal source output is 62 μ s-T for X radio frequency channels0, for Y radio frequency channels are 74 μ s-T0, wherein,
The time measurement point of request signal and answer signal is the half-amplitude point of first pulse envelope.
Step 7：The air-air response delay precision test of Tacan signal simulator
Now simulator airborne equipment delay measurements are T for observation, then simulator airborne equipment Time delay measurement precision is for X
Radio frequency channel is Δ T=T-62 μ S+T0, for Y radio frequency channels are Δ T=T-74 μ S+T0。
Note：Change simulator radio frequency channel and vector signal source output frequency it is measurable go out not Tacan signal simulator under cochannel
Air-air response delay precision.
Claims (2)
1. the air-air response Time delay measurement Precision calibration device of a kind of tacan beacon simulator, it is characterised in that：Computer controls tower
Kang Xinbiao simulators export the distance measurement inquiring pulse under air-air pattern, and Jing circulators access oscillograph, for request signal survey
Amount, while tacan beacon simulator output distance measurement inquiring trigger, all the way as the time reference of oscilloscope measurement, Ling Yilu
Triggering vector signal generator output range finding transponder pulse；Transponder pulse find range Jing after power amplification, by directional coupler, coupling
Jing circulators all the way are closed out, as the range finding answer signal of tacan beacon simulator, another road is coupled out and is accessed oscillograph, be used for
Answer signal is measured；The time difference that oscilloscope measurement goes out between distance measurement inquiring signal and range finding answer signal, with tacan beacon mould
Intend the air-air response delay measurements that obtain of device measurement to be compared, and by cable between tacan beacon simulator and circulator
Length carries out time bias, obtains the air-air response Time delay measurement precision of simulator Tacan.
2. a kind of air-air response Time delay measurement Precision calibration method of tacan beacon simulator of utilization claim 1 described device,
It is characterized in that comprising the steps：
Step 1, measurement Tacan signal simulator radio frequency interface obtain cable equivalent time to the cable length L between circulator
PostponeWherein C=300m/ μ s, are radio propagation speed；
Step 2, the air-air pattern radio frequency channel of the Tacan function of Tacan signal simulator set in the range of 1X~126X and 1Y~126Y
Put, output power levels are -10dBm；
Step 3, vector signal generator power output are set to 18dBm, and output frequency is set to and Tacan signal simulator pair
The answer signal frequency answered；
The range finding response letter of step 4, the distance measurement inquiring signal that Tacan signal simulator is sent and vector signal generator output
Number Hilbert conversion is carried out, obtain the envelope of distance measurement inquiring signal and range finding answer signal；
The Time delay of step 5, adjustment vector signal generator, obtains the time of distance measurement inquiring signal and range finding answer signal
Difference, for X radio frequency channels are 62 μ s-T0, for Y radio frequency channels are 74 μ s-T0, wherein, the time of distance measurement inquiring signal and range finding answer signal
Measurement point is the half-amplitude point of first pulse envelope；
Step 6, measurement Tacan signal simulator airborne equipment delay measurements T, then Tacan signal simulator airborne equipment time delay
Certainty of measurement is Δ T=T-62 μ S+T for X radio frequency channels0, for Y radio frequency channels are Δ T=T-74 μ S+T0。
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107807351A (en) * | 2017-11-28 | 2018-03-16 | 天津七六四通信导航技术有限公司 | A kind of Tacan test and supervising device |
| CN108120964A (en) * | 2017-11-22 | 2018-06-05 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | The method that dynamic test secondary radar the machine delay data improves range accuracy |
| CN108196249A (en) * | 2017-12-29 | 2018-06-22 | 中国电子科技集团公司第二十研究所 | A kind of implementation method of Tacan surface beacon compatibility ground function for monitoring |
| CN108318053A (en) * | 2018-01-31 | 2018-07-24 | 北京空间机电研究所 | A kind of space optical remote camera imaging moment stated accuracy measurement method and system |
| CN114088978A (en) * | 2021-11-16 | 2022-02-25 | 中国电子科技集团公司第二十研究所 | PXI structure-based calibration method and device for TACAN signal speed parameters |
| CN115047445A (en) * | 2022-08-17 | 2022-09-13 | 四川九洲空管科技有限责任公司 | Random response delay-based friend-foe identification de-interleaving method and system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108120964A (en) * | 2017-11-22 | 2018-06-05 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | The method that dynamic test secondary radar the machine delay data improves range accuracy |
| CN108120964B (en) * | 2017-11-22 | 2021-12-07 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Method for dynamically testing time delay data of secondary radar local machine to improve ranging precision |
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| CN108196249A (en) * | 2017-12-29 | 2018-06-22 | 中国电子科技集团公司第二十研究所 | A kind of implementation method of Tacan surface beacon compatibility ground function for monitoring |
| CN108196249B (en) * | 2017-12-29 | 2021-12-28 | 中国电子科技集团公司第二十研究所 | Method for realizing compatibility of Takang ground beacon and ground monitoring function |
| CN108318053A (en) * | 2018-01-31 | 2018-07-24 | 北京空间机电研究所 | A kind of space optical remote camera imaging moment stated accuracy measurement method and system |
| CN108318053B (en) * | 2018-01-31 | 2020-09-18 | 北京空间机电研究所 | Method and system for measuring imaging time calibration precision of space optical remote sensing camera |
| CN114088978A (en) * | 2021-11-16 | 2022-02-25 | 中国电子科技集团公司第二十研究所 | PXI structure-based calibration method and device for TACAN signal speed parameters |
| CN115047445A (en) * | 2022-08-17 | 2022-09-13 | 四川九洲空管科技有限责任公司 | Random response delay-based friend-foe identification de-interleaving method and system |
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