CN104075744B - A kind of remote-measuring equipment automatization calibration system - Google Patents
A kind of remote-measuring equipment automatization calibration system Download PDFInfo
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Abstract
The invention discloses a kind of remote-measuring equipment automatization calibration system, belong to remote-measuring equipment measuring technology, controlling platform including Man Machine Interface, demarcation signal analog systems, matrix switch, signal telemetry equipment, data acquisition/reception unit, instrument controlling unit, data processing platform (DPP), software, the present invention estimates output signal by the method for Data Analysis Services.The reference signal that output signal inputs with demarcation signal analog systems is made comparisons, matching transmission curve, and calculate ssystem transfer function and transmission precision, generate data form and record each channel transmission data and characterisitic function.The present invention is automatically to test direct current, the system of AC signal channel transfer coefficient according to user's request.This system is based on virtual instrument platform, the test of different model remote-measuring equipment channel transfer coefficient can be used for rapidly and accurately, can obtain the transmission channel model of equipment to be tested, under different external environment conditions, the correction of remote-measuring equipment transmission channel provides foundation visual and clearly.
Description
Technical field
The present invention relates to a kind of remote-measuring equipment automatization based on LabWindows/CVI software platform calibration system, belong to
Remote-measuring equipment measuring technology.
Background technology
Current domestic remote-measuring equipment development and production unit all uses artificial or automanual mode to test, this test mode
Cannot meet the testing requirement of the telemetry system become increasingly complex, be embodied as following problem:
1) the simple model remote-measuring equipment that telemetered signal way is few, type is few and transmission precision requirement is low it is only applicable to
Test.Test process is extremely complex, and 2～3 testers to spend several hours and just can complete complete test.
2) generally require multiple personnel to divide the work test, each tester must grasp various signal parameter directly or
Indirect measurement method, and various measurement results are carried out interpretation and hand-kept, test accuracy is affected by human factors greatly,
It is difficult to form standardized test；
3) cannot be carried out telemetering channel transmission coefficient to demarcate, theoretical estimated value can only be used according to hardware circuit design.
Owing to not accounting for the diversity between different batches telemetering module and different telemetering channel, each telemetering channel transmission precision
Test result is true not, accurately.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the present invention provides a kind of remote-measuring equipment automatization to demarcate
System, native system can test direct current automatically according to user's request, the system of AC signal channel transfer coefficient, can be quickly
It is accurately used for the test of different model remote-measuring equipment channel transfer coefficient, equipment to be tested can be obtained visual and clearly
Transmission channel model, under different external environment conditions, the correction of remote-measuring equipment transmission channel provides foundation.
For achieving the above object, the technical solution used in the present invention is: a kind of remote-measuring equipment automatization calibration system, including:
Man Machine Interface, described Man Machine Interface is for the input of customer parameter, and sends to soft by this customer parameter
Part controls platform, and described customer parameter includes that path setting to be measured, mode to be measured set, calibration mode and to be measured logical
Signal source required for road is set；
Demarcation signal analog systems, described demarcation signal analog systems is for be measured logical according to receive from instrument controlling unit
Signal source parameter required for road produces corresponding reference signal with calibration mode, and this reference signal is passed through matrix switch
Access the Man Machine Interface of signal telemetry equipment；Described demarcation signal analog systems includes providing the able to programme of DC level
Precision voltage source and the function signal generator of offer AC signal；
Matrix switch, described matrix switch controls information for the channel selecting to be measured sent according to instrument controlling unit and controls
The switching that signalling channel between demarcation signal analog systems and signal telemetry equipment connects, forms passage to be measured, and this is to be measured
Passage is used for the transmission of signal between demarcation signal analog systems and signal telemetry equipment；
Signal telemetry equipment, described signal telemetry equipment switchs, for receiving matrix, the signal that passage to be measured sends, and will letter
Number add on carrier wave, this carrier signal is sent to data acquisition/reception unit simultaneously；
Data acquisition/reception unit, the carrier wave letter that described data acquisition/reception unit sends for receiving signal telemetry equipment
Number, and transmit to data processing platform (DPP) after being demodulated；
Instrument controlling unit, described instrument controlling unit controls the reception of the customer parameter information that platform transmits for software,
And send the signal source information required for passage to be measured therein to demarcation signal analog systems；For receiving software control
The channel selecting to be measured that platform transmits controls information, and this channel selecting to be measured control information is sent to matrix switch；With
Self-inspection information, initialization instrument, the duty of detecting instrument that platform transmits is controlled in receiving software；Soft for receiving
Part controls the pattern information that platform transmits, and selects instrument direct current calibration mode or exchange calibration mode according to pattern information,
And send selected calibration mode to demarcation signal analog systems；
Data processing platform (DPP), described data processing platform (DPP) is for receiving at the data that unit collects data acquisition
Reason, described data process and include by receiving data and producing the contrast of signal, carry out the drafting of channel transfer curve, biography
The matching of defeated equation, the process of generation nominal data form；The Fitting Calculation according to transmission equation goes out system transter
And transmission precision；Described nominal data form is used for recording each channel transmission data and characterisitic function；And channel transfer is bent
The drafting of line, the matching of transmission equation, nominal data form, transmission function, transmission precision information are sent to software control
Platform；
Software controls platform, and described software controls platform and is used for receiving the customer parameter information of Man Machine Interface input,
And the signal source required for the passage to be measured in this customer parameter information is passed to instrument controlling unit；According to passage to be measured
Set information produces one or more passage of selection matrix switch and controls information as channel selecting to be measured, and will
This channel selecting to be measured controls information and is sent to instrument controlling unit；For producing self-test signal according to customer parameter information,
And deliver it to instrument controlling unit；For producing pattern information according to customer parameter information, and this pattern is believed
Breath sends instrument controlling unit to；For receiving the drafting of channel transfer curve, the transmission equation that data processing platform (DPP) transmits
Matching and transmission precision the above results is stored in nominal data file.
Further: also include that corridorbarrier function mode module, described corridorbarrier function mode module include multichannel calibration mold
Formula module and single channel calibration mode module, described multichannel calibration mode module is defeated by Man Machine Interface for user
Entering the signal source parameter required for plural passage to be measured and each passage to be measured, its method of testing is as follows；System root
The drafting of channel transfer curve of its correspondence, the matching of transmission equation, passage is generated respectively according to each lane testing result to be measured
Transmission precision information, above-mentioned information is automatically saved in nominal data file by remote-measuring equipment automatization calibration system；Then
The above-mentioned information that the passage each to be measured being stored in nominal data file generates is loaded into remote-measuring equipment automatization and demarcates system by user
System, carries out the replay of single passage, checks that result is the most correct, completes to demarcate flow process；
Described single channel calibration mode module for user by Man Machine Interface input one needs passage to be measured and
Signal source required for passage to be measured, its method of testing is as follows；System generates according to the signal source of passage to be measured and correspondence thereof
The drafting of channel transfer curve of its correspondence, the matching of transmission equation, channel transfer precision information, above-mentioned information is by remote measurement
Equipment automatization calibration system automatically saves in nominal data file；Then user will be stored in each of nominal data file
The above-mentioned information that passage to be measured generates is loaded into remote-measuring equipment automatization calibration system, carries out the replay of single passage, checks knot
Fruit is the most correct, completes to demarcate flow process.
Preferred: described demarcation signal analog systems includes providing the programmable precision power supply of DC level and function signal to send out
Raw device.
Preferred: the method for estimation of described transmission function is:
The first step, by the inverse multi-term expression closing this channel transfer function of acquisition of transmitting terminal and receiving end signal curve
F (x):
F (x)=k3x3+k2x2+k1x+k0=y (3)
Wherein, the sample value of transmitting terminal signal is: X=x1,x2,...,xN (1)
The sample value of receiving end signal is: Y=y1,y2,...,yN (2)
Second step, according to transmitting terminal signal and transmission functional relation, estimates standard deviation Δ and correlation coefficient ρ:
Wherein: CXY=E [(X-mx)(Y-my)] (7)
mx, myAnd σx,σyRepresent average and the mean square deviation of transmission/reception sample value respectively；
3rd step, carries out parameter estimation to the amplitude of channel reception end signal and frequency:
For direct current channel, at the Man Machine Interface of passage, produce a fixing level every t, defeated at passage
Go out end, obtain current level value every Δ t sampling, select the level value of interlude to carry out in every section of level sampling sequence
Averagely, as the estimated value of direct current channel amplitude, every section of level sampling sequence is made to have n sampled value, wherein:
n=t/Δt (8)
Select (n*0.4 rounds) individual to (n*0.6 rounds) individual level cumulative after average；
For communication channel, select different amplitude, the method for estimation of frequency according to the signal to noise ratio (SNR) of input signal:
Under the conditions of high s/n ratio, first ask for the cycle T of triangular wave by the method for zero passage detection, then to the triangular wave in this cycle
The absolute value of amplitude is averaging and obtains average E, utilizes the relation of amplitude A=2*E that amplitude is made estimation；And in low noise
Under the conditions of Bi, then need, by the method asking for auto-correlation function, the amplitude of triangular wave is made estimation.
A kind of remote-measuring equipment automatization calibration system that the present invention provides, compared to existing technology, has the advantages that
Compared to existing manually, semi-artificial calibration technique, program measuring accuracy is high, can commonly use various remote-measuring equipment；
The result data of test gained is recorded in the document of correspondence automatically, alleviates the burden of tester, improves testing efficiency；
This automatization's calibration facility also has calibration curve and reviews the function of reproduction so that tester can obtain at any time intuitively
Any demarcation test result of passage, it is to avoid artificial, searches the trouble of respective channel record, stops during semi-artificial test
Data that may be present fill in mistake.Therefore the present invention can test direct current automatically according to user's request, and AC signal leads to
The system of road transmission coefficient.This system, based on virtual instrument platform, can be used for different model remote-measuring equipment rapidly and accurately and lead to
The test of road transmission coefficient, can obtain the transmission channel model of equipment to be tested visual and clearly, for different external environment conditions
Under, the correction of remote-measuring equipment transmission channel provides foundation.
Accompanying drawing explanation
Fig. 1 is the 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 the software workflow of the present invention；
Fig. 5 is the range error of AC signal under the conditions of different signal to noise ratio；
Fig. 6 is that the frequency of AC signal is by mistake under the conditions of different signal to noise ratio；
Fig. 7 is remote-measuring equipment the 18th channel interface circuit；
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is further described.
A kind of remote-measuring equipment automatization calibration system, as Figure 1-4, including:
Man Machine Interface, described Man Machine Interface is for the input of customer parameter, and sends to soft by this customer parameter
Part controls platform, and described customer parameter includes that path setting to be measured, mode to be measured set, calibration mode and to be measured logical
Signal source required for road is set；
Demarcation signal analog systems, described demarcation signal analog systems is for be measured logical according to receive from instrument controlling unit
Signal source parameter required for road produces corresponding reference signal with calibration mode, and this reference signal is passed through matrix switch
Access the Man Machine Interface of signal telemetry equipment；Described demarcation signal analog systems includes providing the able to programme of DC level
Precision voltage source and the function signal generator of offer AC signal；
Matrix switch, described matrix switch controls information for the channel selecting to be measured sent according to instrument controlling unit and controls
The switching that signalling channel between demarcation signal analog systems and signal telemetry equipment connects, forms passage to be measured, and this is to be measured
Passage is used for the transmission of signal between demarcation signal analog systems and signal telemetry equipment；
Signal telemetry equipment, described signal telemetry equipment switchs, for receiving matrix, the signal that passage to be measured sends, and will letter
Number add on carrier wave, this carrier signal is sent to data acquisition/reception unit simultaneously；
Data acquisition/reception unit, the carrier wave letter that described data acquisition/reception unit sends for receiving signal telemetry equipment
Number, and transmit to data processing platform (DPP) after being demodulated；
Instrument controlling unit, described instrument controlling unit controls the reception of the customer parameter information that platform transmits for software,
And send the signal source information required for passage to be measured therein to demarcation signal analog systems；For receiving software control
The channel selecting to be measured that platform transmits controls information, and this channel selecting to be measured control information is sent to matrix switch；With
Self-inspection information, initialization instrument, the duty of detecting instrument that platform transmits is controlled in receiving software；Soft for receiving
Part controls the pattern information that platform transmits, and selects instrument direct current calibration mode or exchange calibration mode according to pattern information,
And send selected calibration mode to demarcation signal analog systems；
Data processing platform (DPP), described data processing platform (DPP) is for receiving at the data that unit collects data acquisition
Reason, described data process and include by receiving data and producing the contrast of signal, carry out the drafting of channel transfer curve, biography
The matching of defeated equation, the process of generation nominal data form；The Fitting Calculation according to transmission equation goes out system transter
And transmission precision；Described nominal data form is used for recording each channel transmission data and characterisitic function；And channel transfer is bent
The drafting of line, the matching of transmission equation, nominal data form, transmission function, transmission precision information are sent to software control
Platform；
Software controls platform, and described software controls platform and is used for receiving the customer parameter information of Man Machine Interface input,
And the signal source required for the passage to be measured in this customer parameter information is passed to instrument controlling unit；According to passage to be measured
Set information produces one or more passage of selection matrix switch and controls information as channel selecting to be measured, and will
This channel selecting to be measured controls information and is sent to instrument controlling unit；For producing self-test signal according to customer parameter information,
And deliver it to instrument controlling unit；For producing pattern information according to customer parameter information, and this pattern is believed
Breath sends instrument controlling unit to；For receiving the drafting of channel transfer curve, the transmission equation that data processing platform (DPP) transmits
Matching and transmission precision the above results is stored in nominal data file；Described transmission equation i.e. transmits function,
Described nominal data file i.e. nominal data form, uses for storing result after test.
Also include that corridorbarrier function mode module, described corridorbarrier function mode module include multichannel calibration mode module and list
Corridorbarrier function mode module, described multichannel calibration mode module inputs two or more for user by Man Machine Interface
Passage to be measured and each passage to be measured required for signal source parameter, its method of testing is as follows；System is according to each to be measured logical
Road test result generates the drafting of channel transfer curve of its correspondence, the matching of transmission equation, channel transfer precision letter respectively
Breath, above-mentioned information is automatically saved in nominal data file by remote-measuring equipment automatization calibration system；Then user will preserve
The above-mentioned information generated in the passage each to be measured of nominal data file is loaded into remote-measuring equipment automatization calibration system, carries out single
The replay of passage, checks that result is the most correct, completes to demarcate flow process；
Described single channel calibration mode module for user by Man Machine Interface input one needs passage to be measured and
Signal source required for passage to be measured, its method of testing is as follows；System generates according to the signal source of passage to be measured and correspondence thereof
The drafting of channel transfer curve of its correspondence, the matching of transmission equation, channel transfer precision information, above-mentioned information is by remote measurement
Equipment automatization calibration system automatically saves in nominal data file；Then user will be stored in each of nominal data file
The above-mentioned information that passage to be measured generates is loaded into remote-measuring equipment automatization calibration system, carries out the replay of single passage, checks knot
Fruit is the most correct, completes to demarcate flow process.
Preferred: described demarcation signal analog systems includes providing the programmable precision power supply of DC level and function signal to send out
Raw device.
Preferred: the method for estimation of described transmission function is:
The first step, by the inverse multi-term expression closing this channel transfer function of acquisition of transmitting terminal and receiving end signal curve
F (x):
F (x)=k3x3+k2x2+k1x+k0=y (3)
Wherein, the sample value of transmitting terminal signal is: X=x1,x2,...,xN (1)
The sample value of receiving end signal is: Y=y1,y2,...,yN (2)
Second step, according to transmitting terminal signal and transmission functional relation, estimates standard deviation Δ and correlation coefficient ρ:
Wherein: CXY=E [(X-mx)(Y-my)] (7)
mx, myAnd σx,σyRepresent average and the mean square deviation of transmission/reception sample value respectively；
3rd step, carries out parameter estimation to the amplitude of channel reception end signal and frequency:
For direct current channel, at the Man Machine Interface of passage, produce a fixing level every t, defeated at passage
Go out end, obtain current level value every Δ t sampling, select the level value of interlude to carry out in every section of level sampling sequence
Averagely, as the estimated value of direct current channel amplitude, every section of level sampling sequence is made to have n sampled value, wherein:
n=t/Δt (8)
Select (n*0.4 rounds) individual to (n*0.6 rounds) individual level cumulative after average；
For communication channel, select different amplitude, the method for estimation of frequency according to the signal to noise ratio (SNR) of input signal:
Under the conditions of high s/n ratio, first ask for the cycle T of triangular wave by the method for zero passage detection, then to the triangular wave in this cycle
The absolute value of amplitude is averaging and obtains average E, utilizes the relation of amplitude A=2*E that amplitude is made estimation；And in low noise
Under the conditions of Bi, then need, by the method asking for auto-correlation function, the amplitude of triangular wave is made estimation.
The 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 to be measured
Each direct current of equipment and communication channel are demarcated, and generate nominal data electronic data sheet and calculate transmission equation coefficient.
The instrument network line graph of calibration system is as shown in Figure 2.
The required precision of calibration system is higher, so every subsystem only carries out the demarcation of a passage simultaneously.Calibration system
Hardware effort flow process be: the normal work of remote-measuring equipment energising, data acquisition switching switch internal circuit tester and switching system
Disconnect, send industrial computer control command under, signal imitation system according to user arrange generation high-precision directly
Stream signal, through the switching of switching switch, signal enters the passage to be calibrated of remote-measuring equipment, signal via Electric plug with shutter
After remote-measuring equipment passage exports, sending by being loaded onto antenna, reception antenna receives wireless signal transmission to number
According to capture card, capture card sends the data gathered to reception industrial computer.Receive industrial computer by the data of reference signal and
The data collection receiving signal gets up, and rower of going forward side by side determines algorithm process and equation matching, calculates sequence of user needs
Data store, store complete after system continue second passage demarcation, and so forth, until user select
Passage all demarcate and terminate.
The general design of software of the present invention is as follows:
The concrete function of testing system software is that the flow direction according to data is called various software function module and realized, according to number
Determine software modules according to the flow direction, carry out design system accordingly and be favorably improved efficiency when software function module designs,
Ensure system stability and effectiveness simultaneously.It is the requirement meeting calibration system functional requirement and system modular herein, root
The Module Division of system is determined, as shown in Figure 3 according to data flow.In figure, behavior calibration software system module is erected on the left side,
Mid portion is functionalization operation, arrows show data flow to.Shown in figure, system is sequentially completed system configuration, demarcates
Flow process, instrument controlling, data process and data storage function.For ensure system versatility, system data storage with
System controlling software is separately, it is to avoid programming confusion causes loss of data.
Software work principle such as Fig. 4, its workflow is as follows:
User, after system completes self-inspection, selects different calibration mode:
Automated multi-channel calibration mode: user selects automated multi-channel calibration mode, then software enters the main interface of automatic Calibration, uses
Family selects to need the passage of automatic Calibration, and is configured the parameter of each passage, is provided with rear system and carries out automatic Calibration
And generate nominal data form；Selected to be loaded into the data file demarcated by user after generating form, carry out answering of single passage
Broadcast, check that result is the most correct, complete to demarcate flow process.
(2) automatic single channel calibration mode: user selects manual calibration mode, selects the single passage needing to demarcate,
The parameter of this passage is configured, starts after being provided with to demarcate, and generate matched curve, result is stored in tables of data
Lattice；Selected to be loaded into the data file demarcated by user after generating form, carry out the replay of single passage, whether check result
Correctly, complete to demarcate flow process.
The algorithm design of calibration software is as follows:
Native system have employed experimental calibration method, and transmitting terminal sends a series of particular test signal, by receiving end signal amplitude
Change come estimated transfer function and other relevant parameter.Assume that the sample value of transmitting terminal and receiving end signal is respectively,
X=x1,x2,...,xN (1)
Y=y1,y2,...,yN (2)
Multi-term expression f (x) of this channel transfer function can be obtained by the inverse conjunction of curve
F (x)=k3x3+k2x2+k1x+k0=y (3)
When system is transmitted accuracy test, it is possible to utilize the following formula docking collection of letters number to compensate,
Wherein, k0,k1,k2,k3Represent transmission coefficient.
Owing to actual telemetering channel transmission characteristic is mostly linear, also need to estimate standard deviation Δ and correlation coefficient ρ,
Wherein CXY=E [(X-mx)(Y-my)] (7)
mx, myAnd σx,σyRepresent average and the mean square deviation of transmission/reception sample value respectively.
In order to obtain the transmission function of passage, the amplitude to channel reception end signal and frequency is needed to carry out parameter estimation.Right
In different types of test signal, need to use the method for estimation of different amplitudes and frequency.
For direct current channel, the amplitude of output signal only need to be estimated by the receiving terminal at passage.Man-machine friendship at passage
Interface mutually, produces a fixing level every t, at the outfan of passage, obtains current level value every Δ t sampling.
The phenomenons such as burr can be produced, for reducing the error of amplitude Estimation, at every section of level sampling during in view of every one-level level saltus step
The level value selecting interlude in sequence is averaged, as the estimated value of direct current channel amplitude.If every section of level sampling sequence
Show n sampled value, wherein:
n=t/Δt (8)
Select the n-th * 0.4 (rounding) individual to the n-th * 0.6 (rounding) individual level cumulative after average.
Communication channel amplitude then should select different amplitudes according to the signal to noise ratio snr of input signal with Frequency Estimation, frequency
Method of estimation.As a example by triangular wave, under the conditions of high s/n ratio, first ask for the cycle of triangular wave by the method for zero passage detection
T, then the absolute value of the triangular wave amplitude in this cycle is averaging obtains average E, utilize the relation of amplitude A=2*E to width
Degree makes estimation.And under Low SNR, then need by the method asking for auto-correlation function, the amplitude of triangular wave to be done
Go out to estimate.
Test result:
As Fig. 5, Fig. 6 show frequency input signal 1KHz, when output sampling frequency rate is 20KHz, sinusoidal wave, square wave,
Triangular wave uses the error of the amplitude of amplitude-frequency algorithm for estimating acquisition and the estimated value of frequency and actual value.
As it is shown in fig. 7, for the interface circuit of certain remote-measuring equipment the 18th passage: it is then at 5 and demarcates certain telemetering channel lower
The curve of 4 rank fitting of a polynomials and calibration result.This result can accurately reflect the transmission function of passage, man-machine interaction
Interface signal is high with the dependency of output end signal, and mean square error is low.
From this circuit diagram, the transmission equation of its theory is as follows with penalty coefficient equation:
And system by demarcating the actual compensation equation obtaining this passage is:
Record correlation coefficient ρ=0.9999 of this passage, standard deviation Δ=1.98e-12.
The present invention direct current to each transmission channel, exchange transmission characteristic carries out multi-point sampler demarcation, and scheme is as follows: mark waiting
Determine the Man Machine Interface input reference signal of system as driving source, estimated by the method for Data Analysis Services at receiving terminal
Count out output signal.The method of estimation of direct current channel transmission coefficient: at the Man Machine Interface of passage, produce one every t
Individual fixing level, at the outfan of passage, obtains current level value every Δ t sampling.In view of every one-level level
The phenomenons such as burr can be produced during saltus step, for reducing the error of amplitude Estimation, every section of level sampling sequence selects stage casing
Level value is averaged 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 the n-th * 0.4 (rounding) individual to the n-th * 0.6 (rounding) individual level cumulative after average.Communication channel transmits
The estimation of coefficient is then different according to added signal type, uses zero passage detection to extract the frequency of signal, with peakvalue's checking or
Amplitude is estimated by the method for person's auto-correlation function.By output signal and Man Machine Interface input after having estimated
Reference signal is made comparisons, matching transmission curve, and calculates ssystem transfer function and transmission precision, generates data form
Record each channel transmission data and characterisitic function.Single channel operationally can be divided into demarcate for this system and user selects multichannel
Automatic Calibration both of which.User can check after single channel manual has been demarcated the current matched curve demarcating passage with
Calibrated error under different matching exponent numbers.If after the automatic Calibration completing the dry passage that user selects, can be marked by loading
The mode determining history data file checks nominal data and the matched curve figure of respective channel, and the result that checking is demarcated is the most just
Really.
The present invention estimates output signal by the method for Data Analysis Services.Output signal is inputted with Man Machine Interface
Reference signal make comparisons, matching transmission curve, and calculate ssystem transfer function and transmission precision, generate data form
Record each channel transmission data and characterisitic function.
Dynamic calibration is divided into single channel manual to demarcate and user selects multichannel automatic Calibration.User can be at single channel manual
The current demarcation matched curve of passage and the calibrated error under different matching exponent numbers is checked after having demarcated.Complete user's choosing
If after the automatic Calibration of the dry passage selected, the demarcation of respective channel can be checked by the way of being loaded into and demarcating history data file
Data and matched curve figure, the result that checking is demarcated is the most correct.
The above is only the preferred embodiment of the present invention, it should be pointed out that: for those skilled in the art
For, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications are also
Should be regarded as protection scope of the present invention.
Claims (3)
1. a remote-measuring equipment automatization calibration system, it is characterised in that including:
Man Machine Interface, described Man Machine Interface is for the input of customer parameter, and this customer parameter sends to software control platform, and described customer parameter includes path setting to be measured, mode to be measured sets, calibration mode and be set the signal source required for passage to be measured；
Demarcation signal analog systems, described demarcation signal analog systems produces corresponding reference signal for signal source parameter and the calibration mode required for the passage to be measured received from instrument controlling unit, and by this reference signal Man Machine Interface by matrix switch access signal telemetry equipment；Described demarcation signal analog systems includes the programmable precision power supply providing DC level and provides the function signal generator of AC signal；
Matrix switch, described matrix switch controls information for the channel selecting to be measured sent according to instrument controlling unit and controls the switching that the signalling channel between demarcation signal analog systems and signal telemetry equipment connects, forming passage to be measured, this passage to be measured is used for the transmission of signal between demarcation signal analog systems and signal telemetry equipment；
Signal telemetry equipment, described signal telemetry equipment switchs, for receiving matrix, the signal that passage to be measured sends, and is added to by signal on carrier wave, sends this carrier signal to data acquisition/reception unit simultaneously；
Data acquisition/reception unit, described data acquisition/reception unit is for receiving the carrier signal that signal telemetry equipment sends, and transmits to data processing platform (DPP) after being demodulated；
Instrument controlling unit, described instrument controlling unit controls the reception of the customer parameter information that platform transmits for software, and sends the signal source information required for passage to be measured therein to demarcation signal analog systems；Control, for receiving software, the channel selecting to be measured control information that platform transmits, and this channel selecting to be measured control information is sent to matrix switch；Self-inspection information, initialization instrument, the duty of detecting instrument that platform transmits is controlled for receiving software；Control, for receiving software, the pattern information that platform transmits, select instrument direct current calibration mode or exchange calibration mode according to pattern information, and send selected calibration mode to demarcation signal analog systems；
Data processing platform (DPP), the data that described data processing platform (DPP) is used for collecting data acquisition/reception unit process, and described data process and include by receiving data and producing the contrast of signal, carry out the drafting of channel transfer curve, the matching of transmission equation, the process of generation nominal data form；The Fitting Calculation according to transmission equation goes out system transter and transmission precision；Described nominal data form is used for recording each channel transmission data and characterisitic function；And the drafting of channel transfer curve, the matching of transmission equation, nominal data form, transmission function, transmission precision information are sent to software and control platform；
Software controls platform, and described software controls platform and is used for receiving the customer parameter information of Man Machine Interface input, and the signal source required for the passage to be measured in this customer parameter information is passed to instrument controlling unit；One or more passage producing selection matrix switch according to path setting information to be measured controls information as channel selecting to be measured, and this channel selecting to be measured control information is sent to instrument controlling unit；For producing self-test signal according to customer parameter information, and deliver it to instrument controlling unit；For producing pattern information according to customer parameter information, and send this pattern information to instrument controlling unit；For receiving the drafting of channel transfer curve, the matching of transmission equation and the transmission precision of data processing platform (DPP) transmission and the above results being stored in nominal data file；
The method of estimation of described transmission function is:
The first step, obtains multi-term expression f (x) of this channel transfer function by transmitting terminal and receiving end signal curve matching:
F (x)=k3x3+k2x2+k1x+k0=y (3)
Wherein, the sample value of transmitting terminal signal is: X=x1,x2,...,xN (1)
The sample value of receiving end signal is: Y=y1,y2,...,yN (2)
Second step, according to transmitting terminal signal and transmission functional relation, estimates standard deviation Δ and correlation coefficient ρ:
Wherein: CXY=E [(X-mx)(Y-my)] (7)
mx, myAnd σx,σyRepresent average and the mean square deviation of transmission/reception sample value respectively；
3rd step, carries out parameter estimation to the amplitude of channel reception end signal and frequency:
For direct current channel, Man Machine Interface at passage, a fixing level is produced every t, outfan at passage, obtain current level value every Δ t sampling, select the level value of interlude to be averaged in every section of level sampling sequence, as the estimated value of direct current channel amplitude, every section of level sampling sequence is made to have n sampled value, wherein:
N=t/ Δ t (8)
Select (n*0.4 rounds) individual to (n*0.6 rounds) individual level cumulative after average；
For communication channel, signal to noise ratio snr according to input signal selects different amplitude, the method for estimation of frequency: under the conditions of high s/n ratio, the cycle T of triangular wave is first asked for by the method for zero passage detection, absolute value to the triangular wave amplitude in this cycle is averaging and obtains average E again, utilizes the relation of amplitude A=2*E that amplitude is made estimation；And under Low SNR, then need, by the method asking for auto-correlation function, the amplitude of triangular wave is made estimation.
Remote-measuring equipment automatization the most according to claim 1 calibration system, it is characterized in that: also include corridorbarrier function mode module, described corridorbarrier function mode module includes multichannel calibration mode module and single channel calibration mode module, described multichannel calibration mode module inputs the signal source parameter required for plural passage to be measured and each passage to be measured for user by Man Machine Interface, and its method of testing is as follows；System generates the drafting of channel transfer curve of its correspondence, the matching of transmission equation, channel transfer precision information respectively according to each lane testing result to be measured, and above-mentioned information is automatically saved in nominal data file by remote-measuring equipment automatization calibration system；Then the above-mentioned information that the passage each to be measured being stored in nominal data file generates is loaded into remote-measuring equipment automatization calibration system by user, carries out the replay of single passage, checks that result is the most correct, completes to demarcate flow process；
Described single channel calibration mode module inputs a signal source needed required for passage to be measured and passage to be measured for user by Man Machine Interface, and its method of testing is as follows；System generates the drafting of channel transfer curve of its correspondence, the matching of transmission equation, channel transfer precision information according to the signal source of passage to be measured and correspondence thereof, and above-mentioned information is automatically saved in nominal data file by remote-measuring equipment automatization calibration system；Then the above-mentioned information that the passage each to be measured being stored in nominal data file generates is loaded into remote-measuring equipment automatization calibration system by user, carries out the replay of single passage, checks that result is the most correct, completes to demarcate flow process.
Remote-measuring equipment automatization the most according to claim 2 calibration system, it is characterised in that: described demarcation signal analog systems includes programmable precision power supply and the function signal generator providing DC level.
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| CN105138720B (en) * | 2015-07-13 | 2018-01-16 | 北京环境特性研究所 | Nominal data curve-fitting method based on matrix ORTHOGONAL TRIANGULAR |
| CN106559104B (en) * | 2015-09-21 | 2020-11-10 | 中国航天科工集团第四研究院指挥自动化技术研发与应用中心 | Portable covered wire simulation box |
| CN108075840B (en) * | 2017-11-16 | 2021-02-09 | 上海微波技术研究所（中国电子科技集团公司第五十研究所） | Automatic calibration system for radio frequency power parameters of wireless communication terminal |
| CN108802654B (en) * | 2018-07-06 | 2019-12-06 | 山东大学 | Automatic calibration acquisition system and method for formation and grading test power supply |
| CN110332569B (en) * | 2019-07-10 | 2021-04-13 | 中山市创尔特智能家居科技有限公司 | Gas stove with separable control part and control method thereof |
| CN112461404A (en) * | 2020-10-30 | 2021-03-09 | 浙江中控技术股份有限公司 | Full-automatic calibration and inspection system suitable for industrial secondary instrument |
| CN112666868B (en) * | 2020-12-23 | 2022-09-13 | 浙江源创智控技术有限公司 | Data acquisition device with self-calibration and self-inspection functions and use method thereof |
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