1. A dynamic object simulator, comprising: the device comprises an azimuth simulation unit, an amplitude and phase calibration source, a signal processing interface unit, a digital receiver, a radio frequency switch matrix and a control center;

the control center generates a control instruction according to the target information to be simulated and sends the control instruction to the signal processing interface unit;

the signal processing interface unit adjusts the operation parameters of the azimuth simulation unit, the operation parameters of the amplitude-phase calibration source, the operation parameters of the radio frequency switch matrix and the operation parameters of the digital receiver according to the control instruction;

the signal sent by the amplitude and phase calibration source is subjected to phase-shifting attenuation processing of the azimuth simulation unit, and then is subjected to processing of the radio frequency switch matrix, and then an analog radio frequency signal is output;

the analog radio frequency signal is received by the digital receiver after passing through the equipment to be tested, and the digital receiver performs visual processing on the received analog radio frequency signal and then sends the processed analog radio frequency signal to the signal processing interface unit, and the processed analog radio frequency signal is sent to the control center for display through the signal processing interface unit.

2. The dynamic target simulator of claim 1, wherein the target information to be simulated comprises: the position and frequency information of the static target, or the position and frequency information of the dynamic target;

the static target is a target with the azimuth precision reaching 0.1 degree within the range of +/-60 degrees;

the dynamic target is a target with stepping dynamic movement within the range of +/-60 degrees.

3. The dynamic target simulator of claim 1, further comprising a chassis, wherein the chassis is made of an aluminum alloy material, the orientation simulation unit, the amplitude and phase calibration source, the signal processing interface unit, the digital receiver, the radio frequency switch matrix and the control center are all installed in the chassis, and a plurality of interfaces are arranged outside the chassis, including: the device comprises a power supply interface, an RS232 serial interface, a VGA interface, an operation interface, a USB interface and a LAN interface.

4. The dynamic object simulator of claim 1, wherein the operating parameters of the orientation simulation unit include: the phase and amplitude of each channel of the azimuth simulation unit;

the operating parameters of the amplitude and phase calibration source include: the amplitude and phase calibrates the frequency of the signal emitted by the source.

5. The dynamic object simulator of claim 1, wherein the visualization process specifically comprises:

and after receiving the analog radio-frequency signal, the digital receiver acquires the amplitude and phase information of the analog radio-frequency signal and sends the amplitude and phase information of the analog radio-frequency signal to the signal processing interface unit for display.

6. The dynamic target simulator of claim 3, further comprising a power supply unit, wherein the power supply unit converts 220V mains power input from the power interface into a high voltage DC power after EMI electromagnetic compatibility filtering and rectification filtering to supply power to the dynamic target simulator.

7. The dynamic target simulator of claim 1, wherein the azimuth simulation unit comprises m channels, and the signal emitted from the amplitude and phase calibration source is equally divided into n channels by the azimuth simulation unit, and n channels of analog radio frequency signals are output after the amplitude and phase of each channel of signal are subjected to phase shift attenuation processing.

8. A dynamic object simulator as claimed in claim 7, n ≧ 8, and m ≧ n.

9. A dynamic target simulator as claimed in claim 1, wherein the amplitude and phase calibration source is comprised of a frequency source, a programmable attenuator, an amplifier; the signal processing interface unit controls the frequency source through a digital board, generates continuous wave signals with controllable frequency and divides the signals into two paths: the a path is output to a digital receiver as a local oscillation signal; b, the path is output by the process control attenuator and is divided into two paths again: b1 path is used as reference source to output to the radio frequency switch matrix for the internal calibration of the target simulator, b2 path is output to the orientation simulation unit to simulate the target signal.

10. A phased array system, comprising a dynamic target simulator as claimed in any one of claims 1 to 9, wherein the dynamic target simulator is configured to simulate radio frequency signals of targets from different directions and different distances, and collect and display test data.

Background

With the engineering application of the phased array antenna, the function and the angle measurement performance of a phased array system are tested, which is a problem to be solved. Signals of the phased array radar system are output from the phased array antenna after being weighted by amplitude and phase, so that the required beam direction is obtained. And forming sum and difference wave beams after the phased array radar receives the response signals, and comparing the amplitude phase information of the calculated sum and difference wave beams with the antenna directional diagram to obtain the azimuth information of the response signals. Because the response signal that has certain direction needs to be simulated out to the test of phased array system of system, and current instrument and equipment can't satisfy the system test demand under this system, all erect wireless antithetical couplet test system through the outfield at present and debug and test, this kind of mode is with high costs, and is efficient, need open up special experimental place and easily receive the environmental impact.

Under the prior art, the functions and the angle measurement performance of the phased array system are verified by mainly debugging and testing a wireless joint test system erected in an external field, and the method needs a special external field test field, so that the cost is high, the environmental interference is easy to cause, and the angle measurement precision and the detection of main performance indexes of the system are influenced.

Disclosure of Invention

The invention aims to solve the technical problems that when the existing phased array system is used for carrying out functions and angle measurement performance, a special external field test field is needed, the cost is high, the system is easily interfered by the environment, the angle measurement precision and the detection of main performance indexes of the system are influenced, and in order to solve the problems, the invention provides a dynamic target simulator and a phased array system.

The invention is realized by the following technical scheme:

this scheme provides a dynamic target simulator, includes: the device comprises an azimuth simulation unit, an amplitude and phase calibration source, a signal processing interface unit, a digital receiver, a radio frequency switch matrix and a control center;

the control center generates a control instruction according to the target information to be simulated and sends the control instruction to the signal processing interface unit;

the signal processing interface unit adjusts the operation parameters of the azimuth simulation unit, the operation parameters of the amplitude-phase calibration source, the operation parameters of the radio frequency switch matrix and the operation parameters of the digital receiver according to the control instruction;

the signal sent by the amplitude and phase calibration source is subjected to phase-shifting attenuation processing of the azimuth simulation unit, and then is subjected to processing of the radio frequency switch matrix, and then an analog radio frequency signal is output;

the analog radio frequency signal is received by the digital receiver after passing through the equipment to be tested, and the digital receiver performs visual processing on the received analog radio frequency signal and then sends the processed analog radio frequency signal to the signal processing interface unit, and the processed analog radio frequency signal is sent to the control center for display through the signal processing interface unit.

The working principle of the scheme is as follows: under the prior art, the functions and the angle measurement performance of the phased array system are verified by mainly debugging and testing a wireless joint test system erected in an external field, and the method needs a special external field test field, so that the cost is high, the environmental interference is easy to cause, and the angle measurement precision and the detection of main performance indexes of the system are influenced. According to the dynamic target simulator designed by the scheme, target radio frequency signals from different directions and different distances are simulated in a certain direction range by controlling the parameters such as the amplitude, the phase and the like of an amplitude and phase calibration source or an external response signal in the target simulator, and data are processed and analyzed through test software, so that the test and verification work of the angular measurement performance of the phased array system in a laboratory environment is realized.

The signal processing interface unit mainly comprises a DSP chip, an FPGA chip, a FLASH, an RAM, a driving chip and the like. The DSP selects TMS320C2812 chip of TI company, and the series of DSPs integrates the characteristics of microcontroller and high-performance DSP, has strong control and signal processing capability, and can realize complex control algorithm.

The FPGA selects an XC4VLX40 chip of XILINX company, the chip integrates 20 ten thousand logic units, 18432 SLICE, 288Kb distributed RAM capacity, 1728Kb block RAM capacity and 500MHz performance and characteristics, and is suitable for design and application with high requirements on logic gates.

The further optimization scheme is that the target information to be simulated comprises: the position and frequency information of the static target, or the position and frequency information of the dynamic target;

the static target is a target with the azimuth precision reaching 0.1 degree within the range of +/-60 degrees;

the dynamic target is a target with stepping dynamic movement within the range of +/-60 degrees. The direction of the dynamic target can be continuously changed, and the simulation function of the dynamic target is realized.

Further optimization scheme does, still includes quick-witted case, the machine case is the aluminum alloy material, position analog unit, amplitude and phase calibration source, signal processing interface unit, digital receiver, radio frequency switch matrix and control center all install in quick-witted incasement, and a plurality of interfaces of machine case peripheral hardware include: the device comprises a power supply interface, an RS232 serial interface, a VGA interface, an operation interface, a USB interface and a LAN interface.

The case provides installation space and a support for internal equipment of the target simulator, and the internal equipment is prevented from being physically damaged. Meanwhile, the case made of the aluminum alloy material can also shield electromagnetic radiation, prevent the internal electromagnetic radiation from influencing the health of users, and prevent the external electromagnetic radiation from interfering the internal board card and the electronic components.

Further optimization scheme is that the operation parameters of the orientation simulation unit include: the phase and amplitude of each channel of the azimuth simulation unit;

the operating parameters of the amplitude and phase calibration source include: the frequency of the signal sent by the amplitude and phase calibration source;

a further optimization scheme is that the visualization processing specifically comprises:

and after receiving the analog radio-frequency signal, the digital receiver acquires the amplitude and phase information of the analog radio-frequency signal and sends the amplitude and phase information of the analog radio-frequency signal to the signal processing interface unit for display. The digital receiver processes an external input signal and outputs information such as amplitude, phase and the like of the signal.

The further optimization scheme is that the system further comprises a power supply unit, wherein 220V mains supply input from a power supply interface is subjected to EMI electromagnetic compatibility filtering, then rectified and filtered and converted into a high-voltage direct-current power supply to supply power for the dynamic target simulator.

The direction simulation unit comprises m channels, the signal sent by the amplitude and phase calibration source is equally divided into n channels by the direction simulation unit, and n channels of analog radio frequency signals are output after the amplitude and the phase of each channel of signal are subjected to phase shift attenuation processing.

The further optimization scheme is that n is more than or equal to 8, and m is more than or equal to n.

The signal emitted by the amplitude-phase calibration source is equally divided into 8 paths through an azimuth simulation unit, and the azimuth simulation unit respectively performs phase-shifting attenuation processing on each path of signal and outputs the signal from the IO 1-IO 8 ports of the target simulator through a radio frequency switch matrix;

the radio frequency switch matrix can independently control K1-K8 switches, control each path of signal to be selectively output from a sigma channel, a delta channel or an IO port, and control a reference source signal input by a phase-switch calibration source to be output from the delta channel or be connected with a load by controlling a K9 switch.

The digital receiver sends the amplitude and phase information of the received analog radio frequency signal (i.e. the sigma and delta receiving channel signals) to the signal processing unit, and sends the information to the control center for display through the signal processing interface unit.

The further optimization scheme is that the amplitude and phase calibration source consists of a frequency source, a programmable attenuator and an amplifier; the signal processing interface unit controls the frequency source through the digital board to generate continuous wave signals with controllable frequency, and the power is divided into two paths: the a path is output to a digital receiver as a local oscillation signal; b, the path is output by the process control attenuator and is divided into two paths again: b1 path is used as reference source to output to the radio frequency switch matrix for the internal calibration of the target simulator, b2 path is output to the orientation simulation unit to simulate the target signal.

The invention also provides a phased array system which comprises the dynamic target simulator, wherein the dynamic target simulator is used for simulating target radio frequency signals from different directions and different distances and collecting and displaying test data.

The signal processing interface unit is a core module of the dynamic target simulator, and a user sets the azimuth and frequency information of a target to be simulated through a control center (test software running on a computer); the control center (computer) generates control instruction and sends the control instruction to the signal processing interface unit through the internal interface.

The signal processing interface unit controls the phase and amplitude of each channel in the azimuth simulation unit, controls the frequency of the amplitude-phase calibration source, and controls the working states of internal units such as the radio frequency switch matrix and the digital receiver and external equipment to be tested. The amplitude and phase calibration source signal passes through the azimuth simulation unit and the radio frequency switch matrix, the radio frequency signals from different azimuths are output in a simulation mode, the signals pass through the tested equipment and are input into the digital receiver and the signal processing interface unit through an external port, information such as amplitude, phase and the like of the analog signals are obtained after signal processing, and the information is sent to a computer for display.

Compared with the prior art, the invention has the following advantages and beneficial effects:

1. the dynamic target simulator and the phased array system can simulate a response signal with a certain direction, and can complete the function and angle measurement performance test of the phased array system through indoor wired joint test without building an external field wireless joint test system.

2. The dynamic target simulator and the phased array system have the advantages of low cost, high efficiency, no special requirements on fields, more accurate direction of the generated simulated target, more stable signal and small influence of environmental interference, thereby greatly improving the accuracy of the test results of the functions and the angle measurement performance of the phased array system.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

FIG. 1 is a schematic diagram of a dynamic object simulator.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: it is not necessary to employ these specific details to practice the present invention. In other instances, well-known structures, circuits, materials, or methods have not been described in detail so as not to obscure the present invention.

Throughout the specification, reference to "one embodiment," "an embodiment," "one example," or "an example" means: the particular features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment of the invention. Thus, the appearances of the phrases "one embodiment," "an embodiment," "one example" or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Further, those of ordinary skill in the art will appreciate that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the description of the present invention, it is to be understood that the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the scope of the present invention.

Example 1

As shown in fig. 1, a dynamic object simulator includes: the device comprises an azimuth simulation unit, an amplitude and phase calibration source, a signal processing interface unit, a digital receiver, a radio frequency switch matrix and a control center;

the control center generates a control instruction according to the target information to be simulated and sends the control instruction to the signal processing interface unit;

the signal processing interface unit adjusts the operation parameters of the azimuth simulation unit, the operation parameters of the amplitude-phase calibration source, the operation parameters of the radio frequency switch matrix and the operation parameters of the digital receiver according to the control instruction;

the signal sent by the amplitude and phase calibration source is subjected to phase-shifting attenuation processing of the azimuth simulation unit, and then is subjected to processing of the radio frequency switch matrix, and then an analog radio frequency signal is output;

the analog radio frequency signal is received by the digital receiver after passing through the equipment to be tested, and the digital receiver performs visual processing on the received analog radio frequency signal and then sends the processed analog radio frequency signal to the signal processing interface unit, and the processed analog radio frequency signal is sent to the control center for display through the signal processing interface unit.

The signal processing interface unit mainly comprises a DSP chip, an FPGA chip, a FLASH, an RAM, a driving chip and the like. The DSP selects TMS320C2812 chip of TI company, and the series of DSPs integrates the characteristics of microcontroller and high-performance DSP, has strong control and signal processing capability, and can realize complex control algorithm. The FPGA selects an XC4VLX40 chip of XILINX company, the chip integrates 20 ten thousand logic units, 18432 SLICE, 288Kb distributed RAM capacity, 1728Kb block RAM capacity and 500MHz performance and characteristics, and is suitable for design and application with high requirements on logic gates.

The signal processing interface unit controls the frequency and the output power of the amplitude-phase calibration source; controlling the amplitude and phase of each channel signal of the azimuth simulation unit; controlling the frequency of the digital receiver, transmitting the DS code to the receiver, and corresponding discrete controls; receiving information such as amplitude, phase and the like of a signal from a digital receiver; controlling the radio frequency switch matrix, and independently controlling each switch in the radio frequency switch matrix; and the information interaction is carried out with the computer, the control of other functional modules is realized, and related information is sent to the computer for display. The signal processing interface unit processes signals, completes corresponding coding, decoding and operation, and completes conversion of various signal formats and levels.

The target information to be simulated comprises: the position and frequency information of the static target, or the position and frequency information of the dynamic target;

the static target is a target with the azimuth precision reaching 0.1 degree within the range of +/-60 degrees;

the dynamic target is a target with stepping dynamic movement within the range of +/-60 degrees.

The machine case is the aluminum alloy material, position analog unit, amplitude and phase calibration source, signal processing interface unit, digital receiver, radio frequency switch matrix and control center all install in the machine case, and a plurality of interfaces of machine case peripheral hardware include: the device comprises a power interface (connected with 220V mains supply), an RS232 serial interface, a VGA interface, an operation interface (connected with a mouse or a keyboard), a USB interface and a LAN interface. The power supply unit has the functions of overcurrent protection, overvoltage protection, overheat protection, electromagnetic compatibility filtering and the like.

The operating parameters of the orientation simulation unit include: the phase and amplitude of each channel of the azimuth simulation unit;

the operating parameters of the amplitude and phase calibration source include: the frequency of the signal sent by the amplitude and phase calibration source;

the visualization processing specifically includes:

and after receiving the analog radio-frequency signal, the digital receiver acquires the amplitude and phase information of the analog radio-frequency signal and sends the amplitude and phase information of the analog radio-frequency signal to the signal processing interface unit for display.

The power supply unit is used for converting 220V mains supply input from the power supply interface into a high-voltage direct-current power supply after EMI electromagnetic compatibility filtering and rectification filtering so as to supply power to the dynamic target simulator and supply power to different loads in the target simulator. The power supply unit has the functions of overcurrent protection, overvoltage protection, overheat protection, electromagnetic compatibility filtering and the like.

The azimuth simulation unit comprises m channels, signals sent by the amplitude and phase calibration source are equally divided into n channels by the azimuth simulation unit, and n channels of analog radio frequency signals are output after amplitude and phase of each channel of signals are subjected to phase shift attenuation; n is greater than or equal to 8, and m is greater than or equal to n.

The signal emitted by the amplitude-phase calibration source is equally divided into 8 paths through an azimuth simulation unit, and the azimuth simulation unit respectively performs phase-shifting attenuation processing on each path of signal and outputs the signal from the IO 1-IO 8 ports of the target simulator through a radio frequency switch matrix;

the radio frequency switch matrix can independently control K1-K8 switches, control each path of signal to be selectively output from a sigma channel, a delta channel or an IO port, and control a reference source signal input by a phase-switch calibration source to be output from the delta channel or be connected with a load by controlling a K9 switch.

The digital receiver sends the amplitude and phase information of the received analog radio frequency signals (i.e. the sigma and delta receiving channel signals) to the signal processing unit, and the information is sent to the control center for display through the signal processing unit.

The further optimization scheme is that the amplitude and phase calibration source consists of a frequency source, a programmable attenuator and an amplifier; the signal processing unit controls the frequency source through the digital board to generate continuous wave signals with controllable frequency, and the power is divided into two paths: the a path is output to a digital receiver as a local oscillation signal; b, the path is output by the process control attenuator and is divided into two paths again: b1 path is used as reference source to output to the radio frequency switch matrix for the internal calibration of the target simulator, b2 path is output to the orientation simulation unit to simulate the target signal.

Example 2

A phased array system applies the dynamic target simulator of the previous embodiment, and the dynamic target simulator is used for simulating target radio frequency signals from different directions and different distances and collecting and displaying test data.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.