CN104075744A - Automatic calibration system for remote-measuring equipment - Google Patents
Automatic calibration system for remote-measuring equipment Download PDFInfo
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Abstract
The invention discloses an automatic calibration system for remote-measuring equipment, and belongs to the testing technology of the remote-measuring equipment. The automatic calibration system comprises a human-computer interaction interface, a calibration signal analog system, a matrix switch, the signal remote-measuring equipment, a data collection/reception unit, an instrument control unit, a data processing platform and a software control platform. The automatic calibration system estimates output signals through the data analyzing and processing method. The output signals and reference signals input by the calibration signal analog system are compared, fitting of a transmission curve is carried out, a system transfer function and transmission accuracy are calculated, and a data table is generated to record transmission data and a characteristic function of each channel. The automatic calibration system can test transmission factors of direct current signal channels and alternating current signal channels automatically according to the user requirements, and can be used for testing the transmission factors of the channels of the remote-measuring equipment of different types fast and accurately on the basis of a virtual instrument platform, obtain a transmission channel model of the equipment to be tested visually and clearly, and provide the basis for correction of the transmission channels of the remote-measuring equipment under different external environments.
Description
Technical field
The present invention relates to a kind of telemetry equipment robotization calibration system based on LabWindows/CVI software platform, belong to telemetry equipment measuring technology.
Background technology
Current domestic telemetry equipment development and production unit all adopts artificial or automanual mode to test, and this test mode cannot meet the testing requirement of the telemetry system becoming increasingly complex, and is embodied as following problem:
1) be only applicable to the test of the simple model telemetry equipment that telesignalisation way is few, type is few and transmission precision requirement is low.Test process is very complicated, and 2～3 testers will spend several hours and just can complete complete test.
2) often need multiple personnel to divide the work to test, each tester must grasp the direct or indirect measuring method of various signal parameters, and various measurement results are carried out to interpretation and hand-kept, test accuracy is affected by human factors greatly, is difficult to form standardized test;
3) cannot take remote measurement channel transfer coefficient demarcate, can only use theoretical estimated value according to hardware circuit design.Due to the otherness of not considering between different batches telemetering module and different telemetering channel, the test result of each telemetering channel transmission precision is true not, accurate.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of telemetry equipment robotization calibration system, native system can be according to user's request, automatically test direct current, the system of AC signal channel transfer coefficient can, rapidly and accurately for the test of different model telemetry equipment channel transfer coefficient, can obtain the transmission channel model of equipment to be tested visual and clearly, under different external environment conditions, the correction of telemetry equipment transmission channel provides foundation.
For achieving the above object, the technical solution used in the present invention is: a kind of telemetry equipment robotization calibration system, comprising:
Man Machine Interface, described Man Machine Interface is used for the input of customer parameter, and sends this customer parameter to software control platform, and described customer parameter comprises path setting to be measured, mode to be measured is set, calibration mode and the needed signal source of passage to be measured is set;
Demarcation signal simulation system, the needed signal source parameter of passage to be measured and calibration mode that described demarcation signal simulation system receives from instrument control module for basis produce corresponding reference signal, and this reference signal are accessed to the Man Machine Interface of signal telemetry equipment by matrix switch; Described demarcation signal simulation system comprises the function signal generator that provides the programmable precision of DC level power supply and provide AC signal;
Matrix switch, the switching that described matrix switch connects for the signalling channel between the channel selecting control information control demarcation signal simulation system to be measured and the signal telemetry equipment that send according to instrument control module, form passage to be measured, this passage to be measured is for the transmission of signal between demarcation signal simulation system and signal telemetry equipment;
Signal telemetry equipment, the signal that described signal telemetry equipment sends for receiving matrix switch passage to be measured, and signal is added on carrier wave, this carrier signal is sent to data acquisition/receiving element simultaneously;
Data acquisition/receiving element, described data acquisition/receiving element is used for receiving the carrier signal that signal telemetry equipment sends, and will after its demodulation, transfer to data processing platform (DPP);
Instrument control module, the reception of the customer parameter information that described instrument control module transmits for software control platform, and send the needed signal source information of passage to be measured wherein to demarcation signal simulation system; The channel selecting control information to be measured transmitting for receiving software control platform, and this channel selecting control information to be measured is sent to matrix switch; For receiving self-inspection information, the initialization instrument that software control platform transmits, the duty of detecting instrument; The pattern information transmitting for receiving software control platform, selects instrument direct current calibration mode or exchanges calibration mode according to pattern information, and sending selected calibration mode to demarcation signal simulation system;
Data processing platform (DPP), described data processing platform (DPP) is processed for the data that data acquisition receiving element is collected, and described data processing comprises by receiving data and producing the matching of the contrast of signal, the drafting of carrying out channel transfer curve, transmission equation, the processing that produces nominal data form; Go out system transter and transmission precision according to the Fitting Calculation of transmission equation; Described nominal data form is used for recording each channel transmission data and characteristic function; And the matching of the drafting of channel transfer curve, transmission equation, nominal data form, transport function, transmission precision information are sent to software control platform;
Software control platform, the customer parameter information that described software control platform is inputted for receiving Man Machine Interface, and the needed signal source of passage to be measured in this customer parameter information is passed to instrument control module; One or more passage that produces selection matrix switch according to path setting information to be measured is as channel selecting control information to be measured, and this channel selecting control information to be measured is sent to instrument control module; For producing self-test signal according to customer parameter information, and send this signal to instrument control module; For producing pattern information according to customer parameter information, and send this pattern information to instrument control module; For receive the channel transfer curve that data processing platform (DPP) transmits drafting, transmission equation matching and transmission precision and the above results is stored in to nominal data file.
Further: also comprise passage calibration mode module, described passage calibration mode module comprises hyperchannel calibration mode module and single channel calibration mode module, described hyperchannel calibration mode module is inputted plural passage to be measured and the needed signal source parameter of each passage to be measured for user by Man Machine Interface, and its method of testing is as follows; System generates respectively drafting, the matching of transmission equation, the channel transfer precision information of its corresponding channel transfer curve according to each lane testing result to be measured, above-mentioned information is stored in nominal data file automatically by telemetry equipment robotization calibration system; Then the above-mentioned information that user generates the passage each to be measured that is stored in nominal data file is written into telemetry equipment robotization calibration system, carries out the replay of single passage, checks that whether result is correct, completes demarcation flow process;
Described single channel calibration mode module is inputted a needs passage to be measured and the needed signal source of passage to be measured for user by Man Machine Interface, and its method of testing is as follows; System generates drafting, the matching of transmission equation, the channel transfer precision information of its corresponding channel transfer curve according to passage to be measured and corresponding signal source thereof, above-mentioned information is stored in nominal data file automatically by telemetry equipment robotization calibration system; Then the above-mentioned information that user generates the passage each to be measured that is stored in nominal data file is written into telemetry equipment robotization calibration system, carries out the replay of single passage, checks that whether result is correct, completes demarcation flow process.
Preferred: described demarcation signal simulation system comprises provides the programmable precision of DC level power supply and function signal generator.
Preferred: the method for estimation of described transport function is:
The first step, by the contrary multi-term expression f (x) that obtains this channel transfer function that closes of transmitting terminal and receiving end signal curve:
f(x)＝k
3x
3+k
2x
2+k
1x+k
0＝y (3)
Wherein, the sample value of transmitting terminal signal is: X=x
1, x
2..., x
n(1)
The sample value of receiving end signal is: Y=y
1, y
2..., y
n(2)
Second step, according to transmitting terminal signal and transport function relational expression, estimate standard deviation Δ and correlation coefficient ρ:
Wherein: C
xY=E[(X-m
x) (Y-m
y)] (7)
M
x, m
yand σ
x, σ
yrepresent respectively average and the mean square deviation of sending/receiving sample value;
The 3rd step, the amplitude to passage receiving end signal and frequency are carried out parameter estimation:
For direct current channel, at the Man Machine Interface of passage, produce a fixing level every t, at the output terminal of passage, obtain current level value every Δ t sampling, in every section of level sampling sequence, select the level value of interlude to average, as the estimated value of direct current channel amplitude, make every section of level sampling sequence have n sampled value, wherein:
n=t/Δt (8)
Selection (n*0.4 rounds) is individual averages after (n*0.6 rounds) individual level adds up;
For communication channel, select different amplitudes, the method for estimation of frequency according to the signal to noise ratio (S/N ratio) of input signal (SNR): under high s/n ratio condition, first ask for the cycle T of triangular wave by the method for zero passage detection, again the absolute value of the triangular wave amplitude in this cycle is averaging and obtains average E, utilize the relation of amplitude A=2*E to make estimation to amplitude; And under Low SNR, need the method by asking for autocorrelation function to make estimation to the amplitude of triangular wave.
A kind of telemetry equipment robotization calibration system provided by the invention, compared to existing technology, has following beneficial effect: than existing artificial, and semi-artificial calibration technique, this scheme measuring accuracy is high, can generally use various telemetry equipment; The result data of test gained is recorded in corresponding document automatically, has alleviated tester's burden, has improved testing efficiency; This robotization calibration facility also has calibration curve reviews the function of reproduction, make tester can obtain intuitively at any time the demarcation test result of any passage, avoid artificial, the trouble of searching respective channel record when semi-artificial test, the data of having stopped to exist are filled in mistake.Therefore the present invention can, according to user's request, test direct current, the system of AC signal channel transfer coefficient automatically.This system is based on virtual instrument platform, can be rapidly and accurately for the test of different model telemetry equipment channel transfer coefficient, can obtain the transmission channel model of equipment to be tested, under different external environment conditions, the correction of telemetry equipment transmission channel provides foundation visual and clearly.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the instrument network line graph of calibration system;
Fig. 3 is that software system data flows to and Module Division figure;
Fig. 4 is software workflow of the present invention;
Fig. 5 is the range error of AC signal under different signal to noise ratio (S/N ratio) conditions;
Fig. 6 is the frequency mistake of AC signal under different signal to noise ratio (S/N ratio) conditions;
Fig. 7 is telemetry equipment the 18th channel interface circuit;
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
A kind of telemetry equipment robotization calibration system, as Figure 1-4, comprising:
Man Machine Interface, described Man Machine Interface is used for the input of customer parameter, and sends this customer parameter to software control platform, and described customer parameter comprises path setting to be measured, mode to be measured is set, calibration mode and the needed signal source of passage to be measured is set;
Demarcation signal simulation system, the needed signal source parameter of passage to be measured and calibration mode that described demarcation signal simulation system receives from instrument control module for basis produce corresponding reference signal, and this reference signal are accessed to the Man Machine Interface of signal telemetry equipment by matrix switch; Described demarcation signal simulation system comprises the function signal generator that provides the programmable precision of DC level power supply and provide AC signal;
Matrix switch, the switching that described matrix switch connects for the signalling channel between the channel selecting control information control demarcation signal simulation system to be measured and the signal telemetry equipment that send according to instrument control module, form passage to be measured, this passage to be measured is for the transmission of signal between demarcation signal simulation system and signal telemetry equipment;
Signal telemetry equipment, the signal that described signal telemetry equipment sends for receiving matrix switch passage to be measured, and signal is added on carrier wave, this carrier signal is sent to data acquisition/receiving element simultaneously;
Data acquisition/receiving element, described data acquisition/receiving element is used for receiving the carrier signal that signal telemetry equipment sends, and will after its demodulation, transfer to data processing platform (DPP);
Instrument control module, the reception of the customer parameter information that described instrument control module transmits for software control platform, and send the needed signal source information of passage to be measured wherein to demarcation signal simulation system; The channel selecting control information to be measured transmitting for receiving software control platform, and this channel selecting control information to be measured is sent to matrix switch; For receiving self-inspection information, the initialization instrument that software control platform transmits, the duty of detecting instrument; The pattern information transmitting for receiving software control platform, selects instrument direct current calibration mode or exchanges calibration mode according to pattern information, and sending selected calibration mode to demarcation signal simulation system;
Data processing platform (DPP), described data processing platform (DPP) is processed for the data that data acquisition receiving element is collected, and described data processing comprises by receiving data and producing the matching of the contrast of signal, the drafting of carrying out channel transfer curve, transmission equation, the processing that produces nominal data form; Go out system transter and transmission precision according to the Fitting Calculation of transmission equation; Described nominal data form is used for recording each channel transmission data and characteristic function; And the matching of the drafting of channel transfer curve, transmission equation, nominal data form, transport function, transmission precision information are sent to software control platform;
Software control platform, the customer parameter information that described software control platform is inputted for receiving Man Machine Interface, and the needed signal source of passage to be measured in this customer parameter information is passed to instrument control module; One or more passage that produces selection matrix switch according to path setting information to be measured is as channel selecting control information to be measured, and this channel selecting control information to be measured is sent to instrument control module; For producing self-test signal according to customer parameter information, and send this signal to instrument control module; For producing pattern information according to customer parameter information, and send this pattern information to instrument control module; For receive the channel transfer curve that data processing platform (DPP) transmits drafting, transmission equation matching and transmission precision and the above results is stored in to nominal data file; Described transmission equation is transport function, and described nominal data file is nominal data form, uses for testing rear event memory.
Also comprise passage calibration mode module, described passage calibration mode module comprises hyperchannel calibration mode module and single channel calibration mode module, described hyperchannel calibration mode module is inputted plural passage to be measured and the needed signal source parameter of each passage to be measured for user by Man Machine Interface, and its method of testing is as follows; System generates respectively drafting, the matching of transmission equation, the channel transfer precision information of its corresponding channel transfer curve according to each lane testing result to be measured, above-mentioned information is stored in nominal data file automatically by telemetry equipment robotization calibration system; Then the above-mentioned information that user generates the passage each to be measured that is stored in nominal data file is written into telemetry equipment robotization calibration system, carries out the replay of single passage, checks that whether result is correct, completes demarcation flow process;
Described single channel calibration mode module is inputted a needs passage to be measured and the needed signal source of passage to be measured for user by Man Machine Interface, and its method of testing is as follows; System generates drafting, the matching of transmission equation, the channel transfer precision information of its corresponding channel transfer curve according to passage to be measured and corresponding signal source thereof, above-mentioned information is stored in nominal data file automatically by telemetry equipment robotization calibration system; Then the above-mentioned information that user generates the passage each to be measured that is stored in nominal data file is written into telemetry equipment robotization calibration system, carries out the replay of single passage, checks that whether result is correct, completes demarcation flow process.
Preferred: described demarcation signal simulation system comprises provides the programmable precision of DC level power supply and function signal generator.
Preferred: the method for estimation of described transport function is:
The first step, by the contrary multi-term expression f (x) that obtains this channel transfer function that closes of transmitting terminal and receiving end signal curve:
f(x)＝k
3x
3+k
2x
2+k
1x+k
0＝y (3)
Wherein, the sample value of transmitting terminal signal is: X=x
1, x
2..., x
n(1)
The sample value of receiving end signal is: Y=y
1, y
2..., y
n(2)
Second step, according to transmitting terminal signal and transport function relational expression, estimate standard deviation Δ and correlation coefficient ρ:
Wherein: C
xY=E[(X-m
x) (Y-m
y)] (7)
M
x, m
yand σ
x, σ
yrepresent respectively average and the mean square deviation of sending/receiving sample value;
The 3rd step, the amplitude to passage receiving end signal and frequency are carried out parameter estimation:
For direct current channel, at the Man Machine Interface of passage, produce a fixing level every t, at the output terminal of passage, obtain current level value every Δ t sampling, in every section of level sampling sequence, select the level value of interlude to average, as the estimated value of direct current channel amplitude, make every section of level sampling sequence have n sampled value, wherein:
n=t/Δt (8)
Selection (n*0.4 rounds) is individual averages after (n*0.6 rounds) individual level adds up;
For communication channel, select different amplitudes, the method for estimation of frequency according to the signal to noise ratio (S/N ratio) of input signal (SNR): under high s/n ratio condition, first ask for the cycle T of triangular wave by the method for zero passage detection, again the absolute value of the triangular wave amplitude in this cycle is averaging and obtains average E, utilize the relation of amplitude A=2*E to make estimation to amplitude; And under Low SNR, need the method by asking for autocorrelation function to make estimation to the amplitude of triangular wave.
Working-flow of the present invention is as follows:
Devices to test switches on power and normally works, and signal imitation generation module produces high-precision DC reference signal each direct current of Devices to test and communication channel are demarcated, and generates nominal data electronic data sheet and also calculates transmission equation coefficient.The instrument network line graph of calibration system as shown in Figure 2.
The accuracy requirement of calibration system is higher, so every subsystem only carries out the demarcation of a passage simultaneously.The hardware effort flow process of calibration system is: the normal work of telemetry equipment energising, the inner multimeter of data acquisition change-over switch and switching system disconnect, sending under the control command of industrial computer, signal imitation system produces high-precision direct current signal according to arranging of user, through the switching of change-over switch, signal enters the passage to be calibrated of telemetry equipment via Electric plug with shutter, signal is after the output of telemetry equipment passage, send by being loaded on antenna, receiving antenna receives wireless signal transmission to data collecting card, capture card sends gathered data to reception industrial computer.Receiving industrial computer gets up the Data Collection of the data of reference signal and reception signal, the rower of going forward side by side is determined algorithm process and equation matching, the data that calculating a series of users needs are stored, store the demarcation of second passage of the complete continuation of system later, and so forth, until the passage that user selects is all demarcated end.
General design of software of the present invention is as follows:
The concrete function of testing system software is to call various software function modules according to the flow direction of data to realize, determine software modules according to data flow, efficiency when carrying out accordingly design system and contributing to improve software function module design ensures system stability and validity simultaneously.For meeting the requirement of calibration system functional requirement and system modular, determine the Module Division of system according to data flow, as shown in Figure 3 herein.In figure, behavior calibration software system module is erected on the left side, and center section is functionalization operation, and arrow represents data flow.Shown in figure, system completion system configuration successively, demarcation flow process, instrument control, data processing and data storage function.For ensureing the versatility of system, data storage and the system controlling software of system separate, and the confusion of avoiding programming causes loss of data.
Software work principle is as Fig. 4, and its workflow is as follows:
User completes after self-inspection in system, selects different calibration mode:
Automated multi-channel calibration mode: user selects automated multi-channel calibration mode, software enters the main interface of automatic Calibration, user selects to need the passage of automatic Calibration, and the parameter of each passage is arranged, and rear system has been set and has carried out automatic Calibration and generate nominal data form; After generation form, selected to be written into the data file of demarcation by user, carry out the replay of single passage, check that whether result is correct, completes demarcation flow process.
(2) automatic single channel calibration mode: user selects manual calibration mode, selects to need the single passage of demarcation, and the parameter of this passage is arranged, starts after having arranged to demarcate, and generates matched curve, deposits result in data form; After generation form, selected to be written into the data file of demarcation by user, carry out the replay of single passage, check that whether result is correct, completes demarcation flow process.
The algorithm design of calibration software is as follows:
Native system has adopted experimental calibration method, and transmitting terminal sends a series of particular test signal, comes estimated transfer function and other correlation parameter by the variation of receiving end signal amplitude.The sample value of supposing transmitting terminal and receiving end signal is respectively,
X＝x
1,x
2,...,x
N (1)
Y＝y
1,y
2,...,y
N (2)
By the contrary multi-term expression f (x) that can obtain this channel transfer function that closes of curve
f(x)＝k
3x
3+k
2x
2+k
1x+k
0＝y (3)
In the time that system is carried out transmission precision test, just can utilize following formula to compensate to received signal,
Wherein, k
0, k
1, k
2, k
3represent transmission coefficient.
Because actual telemetering channel transport property is mostly linear, also need to estimate standard deviation Δ and correlation coefficient ρ,
Wherein C
xY=E[(X-m
x) (Y-m
y)] (7)
M
x, m
yand σ
x, σ
yrepresent respectively average and the mean square deviation of sending/receiving sample value.
In order to obtain the transport function of passage, need to carry out parameter estimation to the amplitude of passage receiving end signal and frequency.For dissimilar test signal, need to adopt different amplitudes and the method for estimation of frequency.
For direct current channel, only need estimate the amplitude of output signal at the receiving terminal of passage.At the Man Machine Interface of passage, produce a fixing level every t, at the output terminal of passage, obtain current level value every Δ t sampling.While considering every one-level level saltus step, can produce the phenomenons such as burr, for reducing the error of amplitude Estimation, in every section of level sampling sequence, select the level value of interlude to average, as the estimated value of direct current channel amplitude.If every section of level sampling sequence has n sampled value, wherein:
n=t/Δt (8)
Select that n*0.4 (rounding) is individual to average after cumulative to the individual level of n*0.6 (rounding).
Communication channel amplitude and Frequency Estimation should be selected different amplitudes according to the signal to noise ratio snr of input signal, the method for estimation of frequency.Taking triangular wave as example, under high s/n ratio condition, first ask for the cycle T of triangular wave by the method for zero passage detection, then the absolute value of the triangular wave amplitude in this cycle is averaging and obtains average E, utilize the relation of amplitude A=2*E to make estimation to amplitude.And under Low SNR, need the method by asking for autocorrelation function to make estimation to the amplitude of triangular wave.
Test result:
As Fig. 5, Figure 6 shows that frequency input signal 1KHz, when output sampling frequency rate is 20KHz, sine wave, square wave, amplitude and the estimated value of frequency and the error of actual value that triangular wave uses amplitude-frequency algorithm for estimating to obtain.
As shown in Figure 7, be the interface circuit of certain telemetry equipment the 18th passage: the curve and the calibration result that are 4 rank fitting of a polynomials of certain telemetering channel under 5 demarcation.This result can accurately reflect the transport function of passage, and the correlativity of Man Machine Interface signal and output end signal is high, and square error is low.
From this circuit diagram, the transmission equation that it is theoretical and penalty coefficient equation are as follows:
And the actual compensation equation that system obtains this passage by demarcation is:
Record correlation coefficient ρ=0.9999 of this passage, standard deviation Δ=1.98e-12.
The direct current of the present invention to each transmission channel, exchanges transport property and carries out multi-point sampler demarcation, and scheme is as follows: as driving source, estimate output signal at receiving end at the Man Machine Interface input reference signal of system to be calibrated by the method for data analysis processing.The method of estimation of direct current channel transmission coefficient: at the Man Machine Interface of passage, produce a fixing level every t, at the output terminal of passage, obtain current level value every Δ t sampling.While considering every one-level level saltus step, can produce the phenomenons such as burr, for reducing the error of amplitude Estimation, in every section of level sampling sequence, select the level value in stage casing to average the estimated value as direct current channel amplitude.If every section of level sampling sequence has n sampled value, wherein:
n=t/Δt (1)
Select that n*0.4 (rounding) is individual to average after cumulative to the individual level of n*0.6 (rounding).The estimation of communication channel transmission coefficient is according to added signal type difference, uses zero passage detection to extract the frequency of signal, detects or the method for autocorrelation function is estimated amplitude with peak value.After having estimated, the reference signal of output signal and Man Machine Interface input is made comparisons, matching transmission curve, and calculate ssystem transfer function and transmission precision, generated data form records each channel transmission data and characteristic function.This system can be divided into single channel demarcation in the time of work and user selects two kinds of patterns of multichannel automatic Calibration.User can check the matched curve of current demarcation passage and calibrated error under different matching exponent numbers after single channel has manually been demarcated.After the automatic Calibration of some passages of selecting at completing user, can demarcate by being written into the mode of history data file and check nominal data and the matched curve figure of respective channel, whether the result that checking is demarcated is correct.
The present invention estimates output signal by the method for data analysis processing.The reference signal of output signal and Man Machine Interface input is made comparisons, matching transmission curve, and calculate ssystem transfer function and transmission precision, generated data form records each channel transmission data and characteristic function.
Dynamic calibration is divided into the manual demarcation of single channel and user selects multichannel automatic Calibration.User can check the matched curve of current demarcation passage and calibrated error under different matching exponent numbers after single channel has manually been demarcated.After the automatic Calibration of some passages of selecting at completing user, can demarcate by being written into the mode of history data file and check nominal data and the matched curve figure of respective channel, whether the result that checking is demarcated is correct.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (4)
1. a telemetry equipment robotization calibration system, is characterized in that, comprising:
Man Machine Interface, described Man Machine Interface is used for the input of customer parameter, and sends this customer parameter to software control platform, and described customer parameter comprises path setting to be measured, mode to be measured is set, calibration mode and the needed signal source of passage to be measured is set;
Demarcation signal simulation system, the needed signal source parameter of passage to be measured and calibration mode that described demarcation signal simulation system receives from instrument control module for basis produce corresponding reference signal, and this reference signal are accessed to the Man Machine Interface of signal telemetry equipment by matrix switch; Described demarcation signal simulation system comprises the function signal generator that provides the programmable precision of DC level power supply and provide AC signal;
Matrix switch, the switching that described matrix switch connects for the signalling channel between the channel selecting control information control demarcation signal simulation system to be measured and the signal telemetry equipment that send according to instrument control module, form passage to be measured, this passage to be measured is for the transmission of signal between demarcation signal simulation system and signal telemetry equipment;
Signal telemetry equipment, the signal that described signal telemetry equipment sends for receiving matrix switch passage to be measured, and signal is added on carrier wave, this carrier signal is sent to data acquisition/receiving element simultaneously;
Data acquisition/receiving element, described data acquisition/receiving element is used for receiving the carrier signal that signal telemetry equipment sends, and will after its demodulation, transfer to data processing platform (DPP);
Instrument control module, the reception of the customer parameter information that described instrument control module transmits for software control platform, and send the needed signal source information of passage to be measured wherein to demarcation signal simulation system; The channel selecting control information to be measured transmitting for receiving software control platform, and this channel selecting control information to be measured is sent to matrix switch; For receiving self-inspection information, the initialization instrument that software control platform transmits, the duty of detecting instrument; The pattern information transmitting for receiving software control platform, selects instrument direct current calibration mode or exchanges calibration mode according to pattern information, and sending selected calibration mode to demarcation signal simulation system;
Data processing platform (DPP), described data processing platform (DPP) is processed for the data that data acquisition receiving element is collected, and described data processing comprises by receiving data and producing the matching of the contrast of signal, the drafting of carrying out channel transfer curve, transmission equation, the processing that produces nominal data form; Go out system transter and transmission precision according to the Fitting Calculation of transmission equation; Described nominal data form is used for recording each channel transmission data and characteristic function; And the matching of the drafting of channel transfer curve, transmission equation, nominal data form, transport function, transmission precision information are sent to software control platform;
Software control platform, the customer parameter information that described software control platform is inputted for receiving Man Machine Interface, and the needed signal source of passage to be measured in this customer parameter information is passed to instrument control module; One or more passage that produces selection matrix switch according to path setting information to be measured is as channel selecting control information to be measured, and this channel selecting control information to be measured is sent to instrument control module; For producing self-test signal according to customer parameter information, and send this signal to instrument control module; For producing pattern information according to customer parameter information, and send this pattern information to instrument control module; For receive the channel transfer curve that data processing platform (DPP) transmits drafting, transmission equation matching and transmission precision and the above results is stored in to nominal data file.
2. telemetry equipment robotization calibration system according to claim 1, it is characterized in that: also comprise passage calibration mode module, described passage calibration mode module comprises hyperchannel calibration mode module and single channel calibration mode module, described hyperchannel calibration mode module is inputted plural passage to be measured and the needed signal source parameter of each passage to be measured for user by Man Machine Interface, and its method of testing is as follows; System generates respectively drafting, the matching of transmission equation, the channel transfer precision information of its corresponding channel transfer curve according to each lane testing result to be measured, above-mentioned information is stored in nominal data file automatically by telemetry equipment robotization calibration system; Then the above-mentioned information that user generates the passage each to be measured that is stored in nominal data file is written into telemetry equipment robotization calibration system, carries out the replay of single passage, checks that whether result is correct, completes demarcation flow process;
Described single channel calibration mode module is inputted a needs passage to be measured and the needed signal source of passage to be measured for user by Man Machine Interface, and its method of testing is as follows; System generates drafting, the matching of transmission equation, the channel transfer precision information of its corresponding channel transfer curve according to passage to be measured and corresponding signal source thereof, above-mentioned information is stored in nominal data file automatically by telemetry equipment robotization calibration system; Then the above-mentioned information that user generates the passage each to be measured that is stored in nominal data file is written into telemetry equipment robotization calibration system, carries out the replay of single passage, checks that whether result is correct, completes demarcation flow process.
3. telemetry equipment robotization calibration system according to claim 2, is characterized in that: described demarcation signal simulation system comprises provides the programmable precision of DC level power supply and function signal generator.
4. telemetry equipment robotization calibration system according to claim 3, is characterized in that: the method for estimation of described transport function is:
The first step, by the contrary multi-term expression f (x) that obtains this channel transfer function that closes of transmitting terminal and receiving end signal curve:
f(x)＝k
3x
3+k
2x
2+k
1x+k
0＝y (3)
Wherein, the sample value of transmitting terminal signal is: X=x
1, x
2..., x
n(1)
The sample value of receiving end signal is: Y=y
1, y
2..., y
n(2)
Second step, according to transmitting terminal signal and transport function relational expression, estimate standard deviation Δ and correlation coefficient ρ:
Wherein: C
xY=E[(X-m
x) (Y-m
y)] (7)
M
x, m
yand σ
x, σ
yrepresent respectively average and the mean square deviation of sending/receiving sample value;
The 3rd step, the amplitude to passage receiving end signal and frequency are carried out parameter estimation:
For direct current channel, at the Man Machine Interface of passage, produce a fixing level every t, at the output terminal of passage, obtain current level value every Δ t sampling, in every section of level sampling sequence, select the level value of interlude to average, as the estimated value of direct current channel amplitude, make every section of level sampling sequence have n sampled value, wherein:
n=t/Δt (8)
Selection (n*0.4 rounds) is individual averages after (n*0.6 rounds) individual level adds up;
For communication channel, select different amplitudes, the method for estimation of frequency according to the signal to noise ratio (S/N ratio) of input signal (SNR): under high s/n ratio condition, first ask for the cycle T of triangular wave by the method for zero passage detection, again the absolute value of the triangular wave amplitude in this cycle is averaging and obtains average E, utilize the relation of amplitude A=2*E to make estimation to amplitude; And under Low SNR, need the method by asking for autocorrelation function to make estimation to the amplitude of triangular wave.
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