CN108169741A - A kind of general typical target system for simulating feature - Google Patents
A kind of general typical target system for simulating feature Download PDFInfo
- Publication number
- CN108169741A CN108169741A CN201711356813.4A CN201711356813A CN108169741A CN 108169741 A CN108169741 A CN 108169741A CN 201711356813 A CN201711356813 A CN 201711356813A CN 108169741 A CN108169741 A CN 108169741A
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- CN
- China
- Prior art keywords
- target system
- attenuator
- typical target
- frequency
- general typical
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/50—Systems of measurement based on relative movement of target
- G01S13/505—Systems of measurement based on relative movement of target using Doppler effect for determining closest range to a target or corresponding time, e.g. miss-distance indicator
-
- 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
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
The present invention provides a kind of general typical target system for simulating feature, including sequentially connected I/O frequency mixers, modulator, time delay optical fiber, demodulator, receiving terminal；Test product output is connected to I/O mixer inputs, and I/O frequency mixers have also accessed two-way orthogonal signalling；Time delay optical fiber length is equal to the target range of required simulation.The present invention is small, light-weight；Without noise jamming, harmonics restraint degree is high；Insertion loss is low, and range simulation precision is high；Frequency accuracy is high, and frequency stability is good；It is low in energy consumption, good economy performance.
Description
Technical field
The present invention relates to a kind of general typical target system for simulating feature.
Background technology
During certain product test, need to simulate the characteristic of its typical target, target property includes：Target range,
Echo Doppler Frequency and echo attenutation size.
Simulation for the target range in the range of 0.5m~35m, traditional method are prolonged using the intrinsic of radio-frequency cable
It realizes late, the simulation for the target range in the range of 35m~200m, traditional method is will be under frequency using down-conversion technique
300MHz or so is converted to, then the simulation of delay time is realized by way of signal processing technology combination software.For echo
The simulation of Doppler frequency, traditional method are by the signal after delay, are given after multiplying Doppler frequency, then up-conversion again
DA is exported.The commonplace mode of simulation of echo attenutation size be by control the size of adjustable attenuator output attenuatoin amount come
It realizes.
The inherent delay of radio-frequency cable is about 4.2ns/m, target range for signal by path half, thus may be used
Know, the target range of 1 meter of radio-frequency cable simulation is：1/2 (4.2ns/m × 1m × 3 × 108m/s)=0.63m, simulated target away from
From 35m, need to use 55.5 meters of radio-frequency cable.The method that target range simulation is realized using the inherent delay of radio-frequency cable, body
It accumulates and weight is big, insertion loss is big, of high cost.The side of target range simulation is realized with upper and lower frequency conversion and combination software mode
Method, since this method carries out that the signal processing required time is longer in itself, the simulation of remote target range, is using in being only suitable for
On there is certain restrictions, and the upper and lower frequency changer circuit of this method is complicated, software code is more, versatility is bad.To the letter after delay
Number, DA outputs are given after multiplying Doppler frequency, then up-conversion again, realize the method that Echo Doppler Frequency is simulated, circuit is opposite
Complexity, volume are also larger.
Invention content
In order to solve the above technical problems, the present invention provides a kind of general typical target system for simulating feature, the general allusion quotation
Type target property simulation system with Microwave New Techniques by realizing that target range, Echo Doppler Frequency and echo attenutation are big
The requirements such as the generalization, miniaturization and high-precision of typical target system for simulating feature are realized in small simulation.
The present invention is achieved by the following technical programs.
A kind of general typical target system for simulating feature provided by the invention, including sequentially connected I/O frequency mixers, modulation
Device, time delay optical fiber, demodulator, receiving terminal；Test product output is connected to I/O mixer inputs, and I/O frequency mixers have also accessed
Two-way orthogonal signalling；Time delay optical fiber length is equal to the target range of required simulation.
Attenuator is further connected between the demodulator and receiving terminal.
The attenuator is numerical control electrically controlled attenuator.
The attenuation of the attenuator is continuously adjusted dynamic range as 0dB~31.5dB.
The Attenuation adjustable stepping of the attenuator is 0.5dB.
The two-way orthogonal signalling that the I/O frequency mixers access are frequency and the amplitude unanimously sinusoidal tune of 90 ° of phase difference
Signal processed.
The attenuator for six tunnels control signal, six tunnels control signal correspond to respectively attenuation 0.5dB, 1dB, 2dB, 4dB,
8dB、16dB。
The beneficial effects of the present invention are：It is small, it is light-weight；Without noise jamming, harmonics restraint degree is high；Insertion loss
Low, range simulation precision is high；Frequency accuracy is high, and frequency stability is good；It is low in energy consumption, good economy performance.
Description of the drawings
Fig. 1 is the connection diagram of the present invention；
Fig. 2 is the principle schematic of attenuator in Fig. 1.
Specific embodiment
Be described further below technical scheme of the present invention, but claimed range be not limited to it is described.
A kind of general typical target system for simulating feature as shown in Figure 1, including sequentially connected I/O frequency mixers, modulation
Device, time delay optical fiber, demodulator, receiving terminal；Test product output is connected to I/O mixer inputs, and I/O frequency mixers have also accessed
Two-way orthogonal signalling；Time delay optical fiber length is equal to the target range of required simulation.
Attenuator is further connected between the demodulator and receiving terminal.
The attenuator is numerical control electrically controlled attenuator.
The attenuation of the attenuator is continuously adjusted dynamic range as 0dB~31.5dB.
The Attenuation adjustable stepping of the attenuator is 0.5dB.
The two-way orthogonal signalling that the I/O frequency mixers access are frequency and the amplitude unanimously sinusoidal tune of 90 ° of phase difference
Signal processed.
The attenuator for six tunnels control signal, six tunnels control signal correspond to respectively attenuation 0.5dB, 1dB, 2dB, 4dB,
8dB、16dB。
Simulation of the present invention to target range is to transmit the required time through respective distance by analog signal to carry out
It is equivalent.The principle of distance delay simulation is that the detectable signal that test product is launched is transformed into the letter with photoelectric conversion technique
The optical signal of number modulation, then the optical signal with optical fiber is transmitted and generates corresponding distance delay, after being finally delayed
Optical signal be transformed to original detectable signal again.The probe signal spectrum characteristic demodulated is completely and former probe signal spectrum is special
Property it is identical, only having carried out corresponding time delay by the use of optical fiber as medium transmits, transmit the delay size of generation and fiber lengths into
Direct ratio.Optical fiber has many advantages, such as that small, light-weight, insertion loss is low, harmonics restraint degree is high and without noise jamming.
Simulation to Echo Doppler Frequency, what is taken is orthogonal modulation phase method, and this method is that test product is launched
Detectable signal receive the tune of the consistent sinusoidal modulation signal for differing and phase 90 ° of two-way frequency and amplitude by I/Q frequency mixers
System, and the upper side band signal with carrier wave is generated, then unwanted harmonic wave is inhibited, by setting different modulated signal frequencies
Rate, it is possible to obtain different Echo Doppler Frequencies.
As shown in Fig. 2, the simulation to echo attenutation size, what is taken is 6 digit control electrically controlled attenuators, attenuation it is continuous
Adjustable dynamic range is 0dB~31.5dB, and Attenuation adjustable stepping is 0.5dB.With control signal d5~d0 from complete " 0 " state to
During full one state gradually changes, the attenuation of output, with the stepping of 0.5dB, is progressively increased to since 0dB
31.5dB。
To sum up, it is of the invention：
1st, with photoelectric conversion technique and optical fiber transmission technique, radiofrequency signal is transformed into the optical signal of the signal modulation simultaneously
It is transmitted to generate corresponding distance delay by optical fiber；
2nd, by controlling the length of optical fiber, the accurate simulation of target range is realized；
3rd, with orthogonal modulation phase method, the simulation of Echo Doppler Frequency is realized；
4th, by setting different orthogonal demodulation signal frequencies, different Echo Doppler Frequencies is simulated；
5th, the simulation of echo attenutation size is realized using numerical control electrically controlled attenuator.
Claims (7)
1. a kind of general typical target system for simulating feature, including sequentially connected I/O frequency mixers, modulator, time delay optical fiber, solution
Adjust device, receiving terminal, it is characterised in that：Test product output is connected to I/O mixer inputs, and I/O frequency mixers have also accessed two
Road orthogonal signalling；Time delay optical fiber length is equal to the target range of required simulation.
2. general typical target system for simulating feature as described in claim 1, it is characterised in that：The demodulator and receiving terminal
Between be further connected with attenuator.
3. general typical target system for simulating feature as claimed in claim 2, it is characterised in that：The attenuator is numerical control electricity
Controlled attenuator.
4. general typical target system for simulating feature as claimed in claim 2, it is characterised in that：The attenuation of the attenuator
Continuously adjustable dynamic range is 0dB~31.5dB.
5. general typical target system for simulating feature as claimed in claim 2, it is characterised in that：The attenuation tune of the attenuator
Section stepping is 0.5dB.
6. general typical target system for simulating feature as described in claim 1, it is characterised in that：The I/O frequency mixers access
Two-way orthogonal signalling for frequency and amplitude are consistent and phase differs 90 ° of sinusoidal modulation signal.
7. general typical target system for simulating feature as claimed in claim 5, it is characterised in that：The attenuator is controlled for six tunnels
Signal processed, six tunnels control signal correspond to attenuation 0.5dB, 1dB, 2dB, 4dB, 8dB, 16dB respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711356813.4A CN108169741A (en) | 2017-12-16 | 2017-12-16 | A kind of general typical target system for simulating feature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711356813.4A CN108169741A (en) | 2017-12-16 | 2017-12-16 | A kind of general typical target system for simulating feature |
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| Publication Number | Publication Date |
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| CN108169741A true CN108169741A (en) | 2018-06-15 |
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| CN201711356813.4A Pending CN108169741A (en) | 2017-12-16 | 2017-12-16 | A kind of general typical target system for simulating feature |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1548984A (en) * | 2003-05-14 | 2004-11-24 | 中国科学院空间科学与应用研究中心 | Full signal sea echo simulator |
| CN101082667A (en) * | 2006-06-01 | 2007-12-05 | 北京航空航天大学 | Millimeter wave quick frequency conversion radar target simulator |
| US20130191102A1 (en) * | 2012-01-19 | 2013-07-25 | Chung-Shan Institute of Science and Technology, Armaments, Bureau, Ministry of National Defense | Apparatus and Method for Simulating a Target |
| CN105403870A (en) * | 2015-12-02 | 2016-03-16 | 中国电子科技集团公司第四十一研究所 | General signal generator for radar target simulation |
| CN106330305A (en) * | 2016-08-31 | 2017-01-11 | 贵州航天电子科技有限公司 | Relative target distance simulation method of millimeter wave radio product |
-
2017
- 2017-12-16 CN CN201711356813.4A patent/CN108169741A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1548984A (en) * | 2003-05-14 | 2004-11-24 | 中国科学院空间科学与应用研究中心 | Full signal sea echo simulator |
| CN101082667A (en) * | 2006-06-01 | 2007-12-05 | 北京航空航天大学 | Millimeter wave quick frequency conversion radar target simulator |
| US20130191102A1 (en) * | 2012-01-19 | 2013-07-25 | Chung-Shan Institute of Science and Technology, Armaments, Bureau, Ministry of National Defense | Apparatus and Method for Simulating a Target |
| CN105403870A (en) * | 2015-12-02 | 2016-03-16 | 中国电子科技集团公司第四十一研究所 | General signal generator for radar target simulation |
| CN106330305A (en) * | 2016-08-31 | 2017-01-11 | 贵州航天电子科技有限公司 | Relative target distance simulation method of millimeter wave radio product |
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Application publication date: 20180615 |
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