CN104133120A - Broadband RCS test method based on multi-channel simultaneous tests - Google Patents
Broadband RCS test method based on multi-channel simultaneous tests Download PDFInfo
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Abstract
The invention provides a broadband RCS test method based on multi-channel simultaneous tests. the capacity of four channels of a four-port vector network analyzer for simultaneously testing four paths of signals with different frequency bands is fully utilized; four antennas with different frequency bands are arranged side by side, ports of the receiving and transmitting antennas are directly connected with receiving and transmitting ports of the vector network analyzer, and coordinated control is performed by a master control computer system through a bus such as a LAN bus or a GPIB. Through the scheme, the capacity of the instrument for performing simultaneous tests through multiple ports can be given full play to, multi-frequency-band tests can be simultaneously performed further through corresponding software processing, and the problem that efficiency of traditional RCS tests is low can be effectively solved.
Description
Technical field
The invention belongs to the WB-RCS technical field of measurement and test that hyperchannel is tested simultaneously, in particular a kind of WB-RCS method of testing of simultaneously testing based on hyperchannel.
Background technology
The RCS of target (RCS) characteristic is a broadband index normally, therefore need to be under very wide frequency range the RCS value of test target.
RCS characteristic test for target, from hardware system, its theory diagram as shown in Figure 1, mainly main control computer 10, vector network analyzer 12, test table 18 and turntable controller 11 thereof, receiving antenna 15, emitting antenna 14, dual-mode antenna support 13 and low scattering support 17 etc., partly consist of, each several part completes test job jointly by cooperation.The concrete test process that the far field test of take is example introducing system as: first dual-mode antenna 14,15 is erected on antenna holder 13, measured target 16 or calibration standard Metal Ball 19 are placed at a distance on turntable 18 low scattering support 17 above, first system is carried out to RCS calibration, first on the low scattering support 17 of turntable, fixed RC S value is known (has determined its RCS value through strict calibration, or can calculate or emulation draw its accurate RCS value through theory) standard metal ball 19, main control computer 10 is by the total line traffic control vector network analyzer 12 of LAN, under it is controlled, it is S21 that measurement parameter is set, vector network analyzer 12 port ones produce continuous wave pumping signal, by emitting antenna 14, radiate, be irradiated to standard metal ball 19, the signal reflecting is sent in vector network analyzer 12 ports 2 after receiving antenna 15 receives, vector network analyzer 12 is processed to the received signal, main control computer 10 obtains original test data from vector network analyzer 12 by LAN bus, thereby obtain one group of data as frequency response item A1, again standard metal ball 19 is removed, measure background signal as an isolation B1, finally measured target 16 is fixed on low scattering support 17, by controlling the rotation of turntable 18, obtain one group of data as test item C1, according to following formula D1=(C1-B1)/(A1-B1), carry out data processing, can obtain the RCS family curve of the different directions of measured target in this frequency range.The RCS broadband character test of target mainly comprises the directly test and two kinds of modes such as test by switch matrix switching channel of manual replacing antenna.
Manually change the direct test mode line of antenna theory diagram as shown in Figure 1, initial/termination frequency that main control computer 10 arranges according to the frequency range of connect antenna, according to above-mentioned test process, complete the characteristic test of RCS of corresponding band, change again the dual-mode antenna of next frequency range into, complete test, until all frequency ranges are all completed, by computer software, according to frequency values, be finally X-axis, return loss data are Y-axis, surveyed data are incorporated in a figure, can obtain the broadband RCS family curve of measured target.
By switch matrix switching channel test mode, be, main control computer is controlled vector network analyzer and switch matrix, passage by switch matrix switches, the transmitting-receiving port of vector network analyzer is communicated with dual-mode antenna respectively, by main control computer, control, can complete successively the RCS calibration of each frequency range, put the RCS value that can read successively different frequency range after measured target, finally merge the broadband RCS family curve that forms measured target.
By analyzing domestic and international list of references and similar techniques, in order to increase the measurement dynamic range of target RCS characteristic test system, system adopts large gain standard-gain horn antenna mostly with dual-mode antenna, and the frequency range of large gain antenna is generally narrower, when carrying out broadband RCS characteristic test, need often to change electromagnetic horn and test respectively, and test result is merged to finally obtain the RCS characteristic of target under wide frequency ranges very.The RCS characteristic test method of existing target mainly contains two kinds, and a kind of is manually to change the direct method of testing of antenna, and another kind is by switch matrix switching channel method of testing.
Manually change the direct method of testing of antenna and need in a frequency range, calibrate the also RCS value of test target, test finishes the dual-mode antenna of rear another frequency range of replacing, calibrate equally again and test, until complete the test of all frequency ranges, this just causes easily causing in the process of changing antenna that repeatability connects error, and the simultaneously required test duration is longer.
By switch matrix switching channel method of testing, can realize once and connecting, by switching different passages, initial/termination frequency is accordingly set simultaneously, realize calibration, the test of system.This method can effectively be removed caused repeatability in the process of changing antenna and connect error, but joins switch matrix outward owing to having increased, and causes Dynamic Range to have reducing to a certain degree, and has reduced the reliability of whole system.
Therefore, there is defect in prior art, needs to improve.
Summary of the invention
Technical matters to be solved by this invention is for the deficiencies in the prior art, and a kind of WB-RCS method of testing of simultaneously testing based on hyperchannel is provided.
Technical scheme of the present invention is as follows:
A WB-RCS method of testing of simultaneously testing based on hyperchannel, wherein, comprises the following steps:
Step 1: main control computer is connected with four port vector network analyzers and turntable controller by netting twine, dual-mode antenna is erected on dual-mode antenna support, four port vector network analyzer front panel wire jumper port one source output terminal mouths connect emitting antenna, front panel wire jumper B input port connects receiving antenna, front panel wire jumper port 2 source output terminal mouths connect emitting antenna, front panel wire jumper A input port connects receiving antenna, front panel wire jumper port 3 source output terminal mouths connect emitting antenna, front panel wire jumper D input port connects receiving antenna, front panel wire jumper port 4 source output terminal mouths connect emitting antenna, front panel wire jumper C input port connects receiving antenna, turntable controller is connected control cables with turntable, low scattering stentplacement is on turntable,
Step 2: place the known standard metal ball of RCS value on low scattering support, under the control of main control computer, four different passages of four port vector network analyzers are set, correspondence arranges four S parameter: S21, S12, S43, S34 respectively, according to the frequency range of connected dual-mode antenna arrange each passage initial/stop frequency, first four port vector network analyzer front panel wire jumper port one source output terminal mouths are launched the continuous wave pumping signal of first frequency range, by emitting antenna, radiate, be irradiated to standard metal ball, the signal reflecting is by sending into after receiving antenna receives in four port vector network analyzer front panel wire jumper B input ports, four port vector network analyzers record measured vector data S21, then four port vector network analyzer front panel wire jumper port 2 source output terminal mouths are launched the continuous wave pumping signal of second frequency range, by emitting antenna, radiate, be irradiated to standard metal ball, the signal reflecting is by sending into after receiving antenna receives in four port vector network analyzer front panel wire jumper A input ports, four port vector network analyzers record measured vector data S12, then four port vector network analyzer front panel wire jumper port 3 source output terminal mouths are launched the continuous wave pumping signal of the 3rd frequency range, by emitting antenna, radiate, be irradiated to standard metal ball, the signal reflecting is by sending into after receiving antenna receives in four port vector network analyzer front panel wire jumper D input ports, four port vector network analyzers record measured vector data S43, the continuous wave pumping signal of the 4th frequency range of last four port vector network analyzer front panel wire jumper port 4 source output terminal mouth transmittings, by emitting antenna, radiate, be irradiated to standard metal ball, the signal reflecting is by sending into after receiving antenna receives in four port vector network analyzer front panel wire jumper C input ports, four port vector network analyzers record measured vector data S34,
Step 3: main control computer obtains respectively original test data S21, S12, S43, S34 from four port vector network analyzers, thereby obtain the vector echo data of one group of measurement standard Metal Ball, these group data comprise the phase and magnitude information with frequency change, using these group data as frequency response item A1, A2, A3, A4;
Step 4: standard metal ball is taken away, repeating step 2,3, thus obtain one group of vector data of measuring background signal as isolation B1, B2, B3, B4;
Step 5: measured target is placed on low scattering support, under the control of main control computer, turntable controller is controlled turntable rotation, trigger four-way vector network analyzer simultaneously and start scanning, repeating step 2,3, thus vector data C1, C2, C3, the C4 in measured target four frequency ranges in different directions obtained;
Step 6: after main control computer reads in vector data A1～A4, B1～B4, the C1～C4 of four frequency ranges of four-way vector network analyzer storage, according to following formula (D1=(C1-B1)/(A1-B1), D2=(C2-B2)/(A2-B2), D3=(C3-B3)/(A3-B3), D4=(C4-B4)/(A4-B4)) carry out data processing, can obtain the vector echo data D1～D4 of measured target in each frequency range;
Step 7: in rectangular coordinate system, take frequency values as X-axis, return loss data are Y-axis, and the data D1～D4 obtaining in step 6 is merged in a figure, can obtain the change curve of the RCS value of measured target in whole frequency range.
The described WB-RCS method of testing of simultaneously testing based on hyperchannel, wherein, described system control unit is main control computer, realizes the automatic control of test macro by LAN bus or gpib bus.
The described WB-RCS method of testing of simultaneously testing based on hyperchannel, wherein, described signal produces with processing unit and is comprised of vector network analyzer, for realizing the generation of pumping signal and the processing of reception signal.
The described WB-RCS method of testing of simultaneously testing based on hyperchannel, wherein, described orientation control module comprises test table, turntable controller and low scattering support, for realizing Long-distance Control turntable, carries out orientation rotation, to realize the orientation of measured target, changes.
The described WB-RCS method of testing of simultaneously testing based on hyperchannel, wherein, four source output terminal mouths and four receiving ports of described hyperchannel in four port vector network analyzer front panel wire jumpers form, and working frequency range is corresponding with connected dual-mode antenna frequency of operation.
The described WB-RCS method of testing of simultaneously testing based on hyperchannel, wherein, described dual-mode antenna comprises emitting antenna and receiving antenna, consists of respectively two groups of identical high-gain horn antennas.
The described WB-RCS method of testing of simultaneously testing based on hyperchannel, wherein, described measured target comprises background, standard metal ball and measured target.
Make full use of the ability that four passages of four port vector network analyzers can be tested different frequency range signal simultaneously, by putting side by side the antenna of 4 groups of different frequency ranges, and the port of dual-mode antenna is directly connected with vector network analyzer transmitting-receiving port, host computer system software is coordinated to control by buses such as LAN or GPIB, first system is carried out to RCS calibration, first on the low scattering support of turntable, fixed RC S characteristic is known (has determined its RCS value through strict calibration, or can calculate or emulation draw its accurate RCS value through theory) standard metal ball, four different emissive source ports of vector network analyzer produce the continuous wave pumping signal of different frequency successively, by corresponding emitting antenna, radiate respectively, be irradiated to Metal Ball, the signal reflecting is sent in corresponding vector network analyzer receiving port after corresponding receiving antenna receives, vector network analyzer is processed receive four groups of unlike signals simultaneously, main control computer obtains original test data by LAN bus from vector network analyzer, thereby obtain one group of data as frequency response item, again standard metal ball is removed, the same background signal of measuring is as isolation, complete the system calibration of each frequency range.Again measured target is fixed on low scattering support, by controlling the rotation of turntable, just can obtains the RCS characteristic of each frequency range of the different directions of measured target.Can in the situation that not changing antenna, 4 frequency ranges, carry out the test of target RCS characteristic so simultaneously, finally remerge into the RCS family curve of full frequency band, make once to test to cover wider frequency range, therefore can greatly improve testing efficiency, simplify testing process.
Adopt such scheme, the ability of simultaneously testing by giving full play to a plurality of ports of instrument, then coordinate corresponding processing, and can carry out the test of a plurality of frequency ranges simultaneously, can effectively solve the low problem of traditional RCS testing efficiency.
Accompanying drawing explanation
Fig. 1 is RCS test philosophy block diagram in prior art.
Fig. 2 is RCS method of testing theory diagram of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment 1
As shown in Figure 2, the invention provides a kind of WB-RCS method of testing of simultaneously testing based on hyperchannel, comprise the following steps:
Step 1: main control computer 20 is connected with four port vector network analyzers 21 and turntable controller 22 by netting twine, dual-mode antenna 30～37 is erected on dual-mode antenna support 26, four port vector network analyzer 21 front panel wire jumper port one source output terminal mouths connect emitting antenna 30, front panel wire jumper B input port connects receiving antenna 31, front panel wire jumper port 2 source output terminal mouths connect emitting antenna 32, front panel wire jumper A input port connects receiving antenna 33, front panel wire jumper port 3 source output terminal mouths connect emitting antenna 34, front panel wire jumper D input port connects receiving antenna 35, front panel wire jumper port 4 source output terminal mouths connect emitting antenna 36, front panel wire jumper C input port connects receiving antenna 37, turntable controller 22 is connected control cables with turntable 25, low scattering support 24 is placed on turntable 25,
Step 2: place known (strict definite its RCS value of calibrating of process of RCS value on low scattering support 24, or can calculate or emulation draw its accurate RCS value through theory) standard metal ball 23, under the control of main control computer 20, four different passages of four port vector network analyzers are set, correspondence arranges four S parameter: S21, S12, S43, S34 respectively, according to the frequency range of connected dual-mode antenna arrange each passage initial/stop frequency.First four port vector network analyzer 21 front panel wire jumper port one source output terminal mouths are launched the continuous wave pumping signal of first frequency range, by emitting antenna 30, radiate, be irradiated to standard metal ball 23, the signal reflecting is sent in four port vector network analyzer 21 front panel wire jumper B input ports after receiving antenna 31 receives, four port vector network analyzers record measured vector data S21, then four port vector network analyzer 21 front panel wire jumper port 2 source output terminal mouths are launched the continuous wave pumping signal of second frequency range, by emitting antenna 32, radiate, be irradiated to standard metal ball 23, the signal reflecting is sent in four port vector network analyzer 21 front panel wire jumper A input ports after receiving antenna 33 receives, four port vector network analyzers record measured vector data S12, then four port vector network analyzer 21 front panel wire jumper port 3 source output terminal mouths are launched the continuous wave pumping signal of the 3rd frequency range, by emitting antenna 34, radiate, be irradiated to standard metal ball 23, the signal reflecting is sent in four port vector network analyzer 21 front panel wire jumper D input ports after receiving antenna 35 receives, four port vector network analyzers record measured vector data S43, the continuous wave pumping signal of the 4th frequency range of last four port vector network analyzer 21 front panel wire jumper port 4 source output terminal mouth transmittings, by emitting antenna 36, radiate, be irradiated to standard metal ball 23, the signal reflecting is sent in four port vector network analyzer 21 front panel wire jumper C input ports after receiving antenna 37 receives, four port vector network analyzers record measured vector data S34,
Step 3: main control computer 20 obtains respectively original test data S21, S12, S43, S34 from four port vector network analyzers 21, thereby obtain the vector echo data of one group of measurement standard Metal Ball 23, these group data comprise the phase and magnitude information with frequency change, using these group data as frequency response item A1, A2, A3, A4;
Step 4: standard metal ball 23 is taken away, repeating step 2,3, thus obtain one group of vector data of measuring background signal as isolation B1, B2, B3, B4;
Step 5: measured target 27 is placed on low scattering support 24, under the control of main control computer 20, turntable controller 22 is controlled turntable 25 rotations, trigger four-way vector network analyzer 21 simultaneously and start scanning, repeating step 2,3, thus vector data C1, C2, C3, the C4 in measured target 27 four frequency ranges in different directions obtained;
Step 6: after main control computer 20 reads in vector data A1～A4, B1～B4, the C1～C4 of four frequency ranges of four-way vector network analyzer 21 storages, according to following formula (D1=(C1-B1)/(A1-B1), D2=(C2-B2)/(A2-B2), D3=(C3-B3)/(A3-B3), D4=(C4-B4)/(A4-B4)) carry out data processing, can obtain the vector echo data D1～D4 of measured target in each frequency range;
Step 7: in rectangular coordinate system, take frequency values as X-axis, return loss data are Y-axis, and the data D1～D4 obtaining in step 6 is merged in a figure, can obtain the change curve of the RCS value of measured target in whole frequency range.
In said method, described system control unit is main control computer, realizes the automatic control of test macro by LAN bus or gpib bus.
In said method, described signal produces with processing unit and is comprised of vector network analyzer, for realizing the generation of pumping signal and the processing of reception signal.
In said method, described orientation control module comprises test table, turntable controller and low scattering support, for realizing Long-distance Control turntable, carries out orientation rotation, to realize the orientation of measured target, changes.In said method, four source output terminal mouth and four receiving ports (A input, B input, C input, D input) of described hyperchannel in four port vector network analyzer front panel wire jumpers form, and working frequency range is corresponding with connected dual-mode antenna frequency of operation.
In said method, described dual-mode antenna comprises emitting antenna and receiving antenna, consists of respectively two groups of identical high-gain horn antennas.
In said method, described measured target comprises background, standard metal ball and measured target.
The present invention makes full use of the ability that four passages of four port vector network analyzers can be tested different frequency range signal simultaneously, by putting side by side the antenna of 4 groups of different frequency ranges, and the port of dual-mode antenna is directly connected with vector network analyzer transmitting-receiving port, host computer system software is coordinated to control by buses such as LAN or GPIB, first system is carried out to RCS calibration, first on the low scattering support of turntable, fixed RC S characteristic is known (has determined its RCS value through strict calibration, or can calculate or emulation draw its accurate RCS value through theory) standard metal ball, four different emissive source ports of vector network analyzer produce the continuous wave pumping signal of different frequency successively, by corresponding emitting antenna, radiate respectively, be irradiated to Metal Ball, the signal reflecting is sent in corresponding vector network analyzer receiving port after corresponding receiving antenna receives, vector network analyzer is processed receive four groups of unlike signals simultaneously, main control computer obtains original test data by LAN bus from vector network analyzer, thereby obtain one group of data as frequency response item, again standard metal ball is removed, the same background signal of measuring is as isolation, complete the system calibration of each frequency range.Again measured target is fixed on low scattering support, by controlling the rotation of turntable, just can obtains the RCS characteristic of each frequency range of the different directions of measured target.Can in the situation that not changing antenna, 4 frequency ranges, carry out the test of target RCS characteristic so simultaneously, finally remerge into the RCS family curve of full frequency band, make once to test to cover wider frequency range, therefore can greatly improve testing efficiency, simplify testing process.
The present invention: test when 1, utilizing ability that the hyperchannel of vector network analyzer can different frequency range be tested simultaneously to realize multiple signals; 2, utilize the multithreading of computing machine, the fast processing that time-sharing multiplex ability realizes data.
Adopt such scheme, the ability of simultaneously testing by giving full play to a plurality of ports of instrument, then coordinate corresponding processing, and can carry out the test of a plurality of frequency ranges simultaneously, can effectively solve the low problem of traditional RCS testing efficiency.And by setting up many group antennas, hyperchannel different frequency scope is tested simultaneously and optimization data acquiring and processing method, finally reach the object of broadband, Quick Measurement measured target RCS characteristic, can effectively remove repeatability and connect error, and greatly reduce the used test time.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improvement and conversion all should belong to the protection domain of claims of the present invention.
Claims (7)
1. a WB-RCS method of testing of simultaneously testing based on hyperchannel, is characterized in that, comprises the following steps:
Step 1: main control computer (20) is connected with four port vector network analyzers (21) and turntable controller (22) by netting twine, dual-mode antenna is erected on dual-mode antenna support (26), four port vector network analyzer (21) front panel wire jumper port one source output terminal mouths connect emitting antenna (30), front panel wire jumper B input port connects receiving antenna (31), front panel wire jumper port 2 source output terminal mouths connect emitting antenna (32), front panel wire jumper A input port connects receiving antenna (33), front panel wire jumper port 3 source output terminal mouths connect emitting antenna (34), front panel wire jumper D input port connects receiving antenna (35), front panel wire jumper port 4 source output terminal mouths connect emitting antenna (36), front panel wire jumper C input port connects receiving antenna (37), turntable controller (22) is connected control cables with turntable (25), low scattering support (24) is placed on turntable (25),
Step 2: at the upper known standard metal ball (23) of RCS value of placing of low scattering support (24), under the control of main control computer (20), four different passages of four port vector network analyzers are set, correspondence arranges four S parameter: S21, S12, S43, S34 respectively, according to the frequency range of connected dual-mode antenna arrange each passage initial/stop frequency, first four port vector network analyzer (21) front panel wire jumper port one source output terminal mouths are launched the continuous wave pumping signal of first frequency range, by emitting antenna (30), radiate, be irradiated to standard metal ball (23), the signal reflecting is sent in four port vector network analyzer (21) front panel wire jumper B input ports after receiving antenna (31) receives, four port vector network analyzers record measured vector data S21, then four port vector network analyzer (21) front panel wire jumper port 2 source output terminal mouths are launched the continuous wave pumping signal of second frequency range, by emitting antenna (32), radiate, be irradiated to standard metal ball (23), the signal reflecting is sent in four port vector network analyzer (21) front panel wire jumper A input ports after receiving antenna (33) receives, four port vector network analyzers record measured vector data S12, then four port vector network analyzer (21) front panel wire jumper port 3 source output terminal mouths are launched the continuous wave pumping signal of the 3rd frequency range, by emitting antenna (34), radiate, be irradiated to standard metal ball (23), the signal reflecting is sent in four port vector network analyzer (21) front panel wire jumper D input ports after receiving antenna (35) receives, four port vector network analyzers record measured vector data S43, the continuous wave pumping signal of the 4th frequency range of last four port vector network analyzer (21) front panel wire jumper port 4 source output terminal mouth transmittings, by emitting antenna (36), radiate, be irradiated to standard metal ball (23), the signal reflecting is sent in four port vector network analyzer (21) front panel wire jumper C input ports after receiving antenna (37) receives, four port vector network analyzers record measured vector data S34,
Step 3: main control computer (20) obtains respectively original test data S21, S12, S43, S34 from four port vector network analyzers (21), thereby obtain the vector echo data of one group of measurement standard Metal Ball (23), these group data comprise the phase and magnitude information with frequency change, using these group data as frequency response item A1, A2, A3, A4;
Step 4: standard metal ball (23) is taken away, repeating step 2,3, thus obtain one group of vector data of measuring background signal as isolation B1, B2, B3, B4;
Step 5: measured target (27) is placed on low scattering support (24), under the control of main control computer (20), turntable controller (22) is controlled turntable (25) rotation, trigger four-way vector network analyzer (21) simultaneously and start scanning, repeating step 2,3, thus vector data C1, C2, C3, the C4 in measured target (27) four frequency ranges in different directions obtained;
Step 6: after main control computer (20) reads in vector data A1～A4, B1～B4, the C1～C4 of four frequency ranges of four-way vector network analyzer (21) storage, according to following formula (D1=(C1-B1)/(A1-B1), D2=(C2-B2)/(A2-B2), D3=(C3-B3)/(A3-B3), D4=(C4-B4)/(A4-B4)) carry out data processing, can obtain the vector echo data D1～D4 of measured target in each frequency range;
Step 7: in rectangular coordinate system, take frequency values as X-axis, return loss data are Y-axis, and the data D1～D4 obtaining in step 6 is merged in a figure, can obtain the change curve of the RCS value of measured target in whole frequency range.
2. WB-RCS method of testing of simultaneously testing based on hyperchannel as claimed in claim 1, is characterized in that, described system control unit is main control computer, realizes the automatic control of test macro by LAN bus or gpib bus.
3. WB-RCS method of testing of simultaneously testing based on hyperchannel as claimed in claim 1, is characterized in that, described signal produces with processing unit and is comprised of vector network analyzer, for realizing the generation of pumping signal and the processing of reception signal.
4. WB-RCS method of testing of simultaneously testing based on hyperchannel as claimed in claim 1, it is characterized in that, described orientation control module comprises test table, turntable controller and low scattering support, for realizing Long-distance Control turntable, carries out orientation rotation, to realize the orientation of measured target, changes.
5. WB-RCS method of testing of simultaneously testing based on hyperchannel as claimed in claim 1, it is characterized in that, four source output terminal mouths and four receiving ports of described hyperchannel in four port vector network analyzer front panel wire jumpers form, and working frequency range is corresponding with connected dual-mode antenna frequency of operation.
6. WB-RCS method of testing of simultaneously testing based on hyperchannel as claimed in claim 1, is characterized in that, described dual-mode antenna comprises emitting antenna and receiving antenna, consists of respectively two groups of identical high-gain horn antennas.
7. WB-RCS method of testing of simultaneously testing based on hyperchannel as claimed in claim 1, is characterized in that, described measured target comprises background, standard metal ball and measured target.
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