CN204330003U - The intelligent test system of new architecture - Google Patents
The intelligent test system of new architecture Download PDFInfo
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- CN204330003U CN204330003U CN201420758015.XU CN201420758015U CN204330003U CN 204330003 U CN204330003 U CN 204330003U CN 201420758015 U CN201420758015 U CN 201420758015U CN 204330003 U CN204330003 U CN 204330003U
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Abstract
The utility model provides a kind of intelligent test system of new architecture, comprises conditioning module group, is provided with the automatic configuring matrix switch module of signal condition between described conditioning module group and outside TEDS sensor; The automatic configuring matrix switch module of signals collecting is provided with between conditioning module group and data acquisition module; Control module control linkage signal condition automatic configuring matrix switch module, the automatic configuring matrix switch module of signals collecting, also connect the TEDS information pin of outside TEDS sensor simultaneously by the automatic configuration module of TEDS matrix switch.The utility model structure is simple, testing process is easy, without the need to artificial input pickup information, and without the need to manual switching test channel and more emat sensor and conditioning module, greatly improves detection efficiency.The utility model is applicable to the sensor output signal after intellectualized reconstruction and carries out conditioning automatically and test automatically.
Description
Technical field
The utility model belongs to Auto-Test System field, relate to a kind of intelligent test system, specifically based on an intelligent test system for TEDS sensor and matrix switch technology, the utility model also relates to based on the gamma correction technology of sensor TEDS information to said system sensing data simultaneously.
Background technology
Legacy test system as shown in Figure 1.Comprise: measurand, sensor, conditioning module, data acquisition module, computer based control system and display platform.The electric parameter being easier to process is responsible for measurand to convert to by sensor; Conditioning module is responsible for converting electrical signals to the voltage signal meeting system requirements; Data acquisition module is responsible for simulating signal to convert to can by the discrete binary digital signal of computer recognizing; Computer based control system and display platform are responsible for the digital signal collected to carry out analyzing, process and showing.
The testing process of above-mentioned legacy test system is:
(1) by sensor directly or be arranged in measurand by corresponding clamp of sensor, the measurement of signal is carried out;
(2), after measured signal spreads out of from sensor, the conditioning module be transferred in corresponding conditioning module group i carries out the conditioning (such as: the conversion of signal type, the zooming in or out of signal amplitude, filtering etc.) of signal;
(3) conditioned Signal transmissions is carried out analog to digital conversion to data acquisition module, simulating signal being converted to can by the discrete binary data of computer recognizing;
(4) computer based control system is analyzed binary data, is processed, and after waiting process to complete, by computer based display platform, test result is shown to user again.
The sensor surveyed in formula system due to tradition is ordinary sensors, ordinary sensors and its legacy test system carry out being connected when configuring, need a large amount of artificial participations just to complete measurand produce the test assignment (configuration etc. of the wiring of such as sensor, the input of sensor parameters, conditioning module) of signal, cause that workload is large, intricate operation, and as easy as rolling off a logly occur mistake.Simultaneously, in reality test, in the face of the difference of testing requirement and sensor nurses one's health demand, in order to obtain signal that detected object produces and measured signal be nursed one's health in scope that data acquisition module can receive, need often more emat sensor and corresponding conditioning module, and the wiring of above-mentioned passage, the replacing of sensor and conditioning module, connection work also need manually to complete, in integration test process, there will be a large amount of connection tasks equally, cause intricate operation and easily occur artificial incorrect operation.
In addition, in traditional detection system, due to reasons such as energy-storage travelling wave tube characteristic, change-over circuit characteristic and environmental factors, there is error in the input and output of sensor, in order to ensure measuring accuracy, needs the approximately linear section utilizing sensor to measure, when precision prescribed is not high, its error can be ignored, but the sensor that precision is higher, the range of linearity is larger then must be adopted to measure in the occasion that ask for something is high, otherwise larger measuring error will be introduced.And in Practical Project test, error is there is between the output signal of most of sensor and actual value, can not accurately reflect measured by measurement, measured in order to measure accurately, usually adopt following methods to ensure measuring accuracy: the sensor that the employing range of linearity is larger or the measuring accuracy by Data correction raising sensor.But the sensor changing the range of linearity larger can increase testing cost, needs a large amount of man power and material of cost and effect is usually undesirable; In Data correction, making up the output nonlinear of sensor by designing a non-linear circuit, realizing sensor input-output characteristic linearize.
Utility model content
The technical problems to be solved in the utility model, be to provide a kind of intelligent test system based on TEDS sensor and matrix switch technology, this system can identify the parameter information of TEDS sensor automatically, without the need to artificial input, time saving and energy saving, and this system according to the TEDS information automatic switching signal transmission channel of the sensor automatically identified and can set up calibration model automatically, saves the troublesome operation manually repeatedly changed, further facilitates operation.
The utility model additionally provides and a kind ofly utilizes the non-linear correction method that in above-mentioned test macro, sensor TEDS information is carried out sensing data.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is:
A kind of intelligent test system based on TEDS sensor and matrix switch technology, it comprises conditioning module group, matrix switch module, data acquisition module, control module, the automatic configuring matrix switch module of signal condition is provided with between described conditioning module group and outside TEDS sensor, described signal condition automatic configuring matrix switch module is provided with the row passage identical with outside TEDS number of sensors, and the row of channels identical with the conditioning module quantity in conditioning module group, the signal input part correspondence of each row passage connects the test signal output terminal of unique TEDS sensor, each row of channels signal output part connects the signal input part of the conditioning module in unique corresponding conditioning module group,
The automatic configuring matrix switch module of signals collecting is provided with between conditioning module group and data acquisition module, described signals collecting automatic configuring matrix switch module is provided with the row of channels identical with the quantity of the conditioning module in conditioning module group, and the row passage identical with data acquisition module number of channels, the signal input part correspondence of each row of channels connects the signal output part of each conditioning module in unique conditioning module group, and the signal output part of each row passage is by data acquisition module link control module;
Described control module control linkage signal condition automatic configuring matrix switch module, the automatic configuring matrix switch module of signals collecting, also connect the TEDS information pin of outside TEDS sensor simultaneously by the automatic configuration module of TEDS matrix switch.
As to restriction of the present utility model: the automatic configuration module of described TEDS matrix switch is provided with the switching channels identical with outside TEDS number of sensors, and the TEDS sensor of correspondence is connected with control module by each switching channels respectively.
Owing to have employed above-mentioned technical scheme, compared with prior art, acquired technical progress is the utility model:
(1) the utility model nurses one's health automatic configuring matrix switch module by signalization, after it detects the information that TEDS sensor collects, control module can the corresponding passage of gating, by the information of collection, the conditioning module be sent in corresponding conditioning module group is nursed one's health, control module continues the respective channel in the automatic configuring matrix switch module of control signal collection afterwards, send the data of collection to data acquisition module and carry out analog to digital conversion, this digital signal transfers final carries out the process such as correction to control module, therefore, the utility model just can be measured after only detection system need being carefully connected the wire automatically, without the need to the parameter information of artificial input pickup, and without the need to manual switching test channel and more emat sensor and conditioning module, avoid the mistake that manual operation occurs, effectively improve detection efficiency simultaneously,
(2) the TEDS sensor of the utility model application merely add a TEDS lead-in wire on the basis of original sensor, an i.e. TEDS chip in parallel on the ground wire of original sensor, do not change the basic structure of sensor, structure is simple, and this sensor can be used as TEDS sensor, original sensor can also be used as and carry out work;
(3) the utility model test macro not only can be used as the test macro of TEDS sensor, can also be used as the test macro of ordinary sensors simultaneously, be widely used.
In sum, the utility model testing process is simple, without the need to artificial input pickup information, and without the need to manual switching test channel and more emat sensor and conditioning module, greatly improves detection efficiency.
The utility model is applicable to the sensor output signal after intellectualized reconstruction and carries out conditioning automatically and test automatically.
The utility model is described in further detail below in conjunction with Figure of description and specific embodiment.
Accompanying drawing explanation
Fig. 1 is the theory diagram of traditional sensors detection system in prior art;
Fig. 2 is the theory diagram of detection system in the utility model embodiment 1;
Fig. 3 is the electrical schematic diagram of TEDS sensor in the utility model embodiment 1;
Fig. 4 a is the topological diagram of the automatic configuration module of TEDS matrix switch in the utility model embodiment 1;
Fig. 4 b is the topological diagram of signal condition automatic configuring matrix switch module and the automatic configuring matrix switch module of signals collecting in the utility model embodiment 1;
Fig. 5 is the process flow diagram of the utility model embodiment 2;
Transducer dwell output curve diagram during ideal linearity when Fig. 6 a is transducer dwell performance correction in the utility model embodiment 2;
Without odd nonlinearity transducer dwell output curve diagram when Fig. 6 b is transducer dwell performance correction in inventive embodiments 2;
Without even nonlinearity transducer dwell output curve diagram when Fig. 6 c is transducer dwell performance correction in the utility model embodiment 2;
Fig. 6 d is transducer dwell timing generally transducer dwell output curve diagram in the utility model embodiment 2;
Fig. 7 is the schematic diagram of sensor performance static shift correction process in the utility model embodiment 2;
The broken line graph that Fig. 8 is the correcting range that provides embodiment in the utility model embodiment 2 when being three sections;
Fig. 9 is the process flow diagram of transducer dwell performance gamma correction in the utility model embodiment 2;
Figure 10 is the schematic diagram of sensor dynamic property gamma correction process in the utility model embodiment 2;
Figure 11 is that the sensor dynamic property providing one of them embodiment in the utility model embodiment 2 corrects front and after correcting curve map;
Figure 12 is that the sensor dynamic property providing another embodiment in the utility model embodiment 2 corrects front and after correcting curve map.
Embodiment
embodimenta kind of intelligent test system based on TEDS sensor and matrix switch technology
The present embodiment is a kind of intelligent test system based on TEDS sensor and matrix switch technology, and as shown in Figure 2, it comprises:
(1) the automatic configuring matrix switch module of signal condition, the signal for being collected by outside TEDS sensor is sent to corresponding Signal-regulated kinase.As shown in Figure 4 b, its topological structure is (L × M) × N to the automatic configuring matrix switch module of signal condition in the present embodiment, is namely provided with that L X M is capable altogether, a N row switching channels, every a line and each to arrange intersection be a switching channels, and each row passage (c
0to c
n-1in passage) corresponding unique outside TDES sensor, i.e. the information of each TEDS sensor collection can only be transmitted by unique row passage; And each row of channels (r
0to r
(L × M)-1) in passage) corresponding connect unique conditioning module in follow-up conditioning module group.
In the present embodiment, corresponding switching channels all can be had in order to make each TEDS sensor outside, the columns not only arranged in signal condition automatic configuring matrix switch module is consistent with the quantity of outside TEDS sensor, and is also set to by the number L of conditioning module group equal with the number of outside TEDS sensor.
(2) conditioning module group, the signal input part connection signal of described conditioning module group nurses one's health the signal output part of automatic configuring matrix switch module.
In the present embodiment, the quantity of conditioning module group is identical with outside TEDS number of sensors, and identical with columns with the line number of switch-linear hybrid in signal condition automatic configuring matrix switch module, the information of unique corresponding TEDS sensor collection can only be passed to by this switching channels the conditioning work that unique corresponding conditioning module group carries out signal by each switching channels namely in the automatic configuring matrix switch module of signal condition.
(3) the automatic configuring matrix switch module of signals collecting, the signal after conditioning module being nursed one's health further transmits.In the present embodiment, the automatic configuring matrix switch module of signals collecting as shown in Figure 4 b, identical with signal condition automatic configuring matrix switch module, be provided with that L X M is capable equally, a N row switching channels, conditioning module in the same corresponding unique conditioning module group of each switching channels, namely after the conditioning module conditioning in a conditioning module group signal can only by the automatic configuring matrix switch module of signals collecting in unique corresponding switching channels transmit.
(4) by outside TEDS sensor, data acquisition module, for detecting that data message converts the digital signal that can identify to.The signal output part of the automatic configuring matrix switch module of signal input part connection signal collection of described data acquisition module, its signal output part connects the follow-up control module correcting signal, process.
(5) the automatic configuration module of TEDS matrix switch, as shown in fig. 4 a, under the control of control module, reads the TEDS information of corresponding TEDS sensor automatically.Be provided with the switching channels identical with TEDS number of sensors equally in the automatic configuration module of TEDS matrix switch in the present embodiment, each TEDS sensor is connected with control module by unique corresponding TEDS switching channels.
Due to the process that the present embodiment is to the Information Monitoring of TEDS sensor, therefore, the sensor of TEDS sensor constructively with traditional used is different, and TEDS sensor used in the present embodiment carries out transforming on the basis of traditional sensors, its structure is concrete as shown in Figure 3: traditional sensors comprises sensor assembly, ground connection is carried out as the ground wire of sensor entirety in one end of sensor assembly, the other end draws signal wire by amplifier, this signal wire is detection line used when detecting external signal, the power supply of sensor assembly is directly connected with external power source by power lead.The present embodiment adds TEDS lead-in wire on this basis, the i.e. ground line parallel one DS2433 chip of sensor assembly, one end of this chip is connected with the ground wire of sensor assembly, and the other end directly as TEDS lead-in wire, is connected with control module by the automatic configuration module of TEDS matrix switch.
Because this TEDS sensor is identical with traditional sensor essential structure, therefore with traditional sensor, there is abundant compatibility, namely in the present embodiment, the working method of TEDS sensor is identical with the working method of traditional sensors, and the sensor of the present embodiment still can use as traditional sensor.
And DS2433 used in the present embodiment carries out intellectualized reconstruction to traditional sensors, adopt the storer selecting Maxim company to produce during TEDS chip design, this storer adopts PR-35 encapsulation, first volume own is little be convenient to integrated, next has larger storage space, is convenient to the more how self-defining information of write sensor.
Wherein, the self-defined information of DS2433 chip is the TEDS information according to IEEE 1451.4 standard design.This TEDS message structure is extremely compact, but but has enough dirigibilities and extendability, can tackle far-ranging sensor type and requirement.
The method of testing of the above-mentioned intelligent test system based on TEDS sensor and matrix switch technology, comprises the following steps as shown in Figure 5:
(1) TEDS information is read: control module is read successively by the passage of the automatic configuration module of TEDS matrix switch, scan the TEDS information of the sensor being connected with measurand.
In the present embodiment, the TEDS information of sensor comprises basic TEDS information and standard TEDS information, and wherein basic TEDS information contains necessary sensor identification information, i.e. identification parameter, as manufacturer, sequence number, version number and data code.And standard TEDS information comprises " tables of data " information comprising sensor-specific, generally the data correctly configuring electric interfaces and measurement data is converted to required for engineering unit, such as: device parameter: as sensor type, sensitivity, zero point drift, transmission bandwidth, unit and precision; Calibrating parameters: as last demarcation date, correction coefficient; Application parameter: as channel recognition, channel packet, sensing station and direction.
Above-mentioned TEDS information is read by the automatic configuration module of TEDS matrix switch by control module.
(2) conditioning module group configures automatically: control module utilizes the conditioning information of the TEDS information analysis TEDS sensor read, and according to conditioning information by signal condition automatic configuring matrix switch module passage, the simulating signal that TEDS sensor detects is switched to corresponding conditioning module group and nurses one's health.
Be provided with unique switching channels by embodiment one with each TEDS sensor corresponding in the known signal condition of Fig. 4 b automatic configuring matrix switch module, realize according to following principle during its Topology Structure Design, as shown in Figure 4:
（1）
（2）
（3）
Wherein:
N
1rrepresent the number of row or conditioning module in the automatic configuration module of the first signal matrix switch;
N
1Srepresent the number of row or sensor in the automatic configuration module of the first signal matrix switch;
N
2rrepresent the number of row or conditioning module in the automatic configuration module of secondary signal matrix switch;
N
2Srepresent the number of row or passage in the automatic configuration module of secondary signal matrix switch;
M represents the number of conditioning module in each conditioning module group;
P represents the number of acquisition channel;
N represents the number of the sensor of access matrix switch;
L represents the number of conditioning module group;
A represents the total number of conditioning module.
(3) automatic switchover of acquisition channel: the signal after conditioning passes through the respective channel of the automatic configuring matrix switch module of signals collecting under the control of control module, data acquisition module is by the corresponding information of signals collecting automatic configuring matrix switch module collection, and the analog to digital conversion of settling signal.
Because the automatic configuring matrix of the signals collecting in the present embodiment switch module is identical with signal condition automatic configuring matrix switch module structure, therefore, the principle of design of its topological structure is identical with the principle of design of the topological structure of above-mentioned signal condition automatic configuring matrix switch module.
(4) gamma correction of data: control module, by the TEDS information read, is resolved the control information of sensor in TEDS information, then entered by correction information band in corresponding calibration model, carry out gamma correction to the signal that TEDS sensor measures.
Owing to needing concrete bearing calibration to realize to the correction of data, and the requirement of different bearing calibrations to system and TEDS sensor is also different, therefore, needs to select suitable bearing calibration to correct signal and just can obtain relatively accurate image data.And select to need during bearing calibration to consider emphatically three key elements:
The size of 1. required TEDS storage space
General traditional TEDS storage space is all less, such as, 1KB or 2KB, and and the TEDS memory field in sensor is also divided into several territory, each territory describes the different aspect of sensor characteristics, and demarcating TEDS is one of them territory.When therefore selecting bearing calibration, the size of required demarcation TEDS memory block must be considered.
2. the operation times needed for each correction
Because the arithmetic capability of system control panel is limited, and need many application programs such as operation system, data acquisition driving simultaneously thereon, if operation times is too many, then causes longer time delay, affect the overall performance of test macro.Therefore, the bearing calibration operation times of selection can not be too many.
The matching of 3. bearing calibration (function) and the uncertainty σ m caused by noise of calibration system
Because correction function exists error in numerical calculation, calibration system has stochastic error, in order to ensure the accuracy of correction data, must consider the uncertainty caused by bearing calibration, and uncertainty can be obtained by the standard deviation of evaluation fitting residual error.
Meanwhile, the sensor type that dissimilar signal carries out gathering is not identical yet, and therefore the signal of corresponding types can only carry out information acquisition by the sensor of corresponding types, and then the gamma correction follow-up for information also exists difference.And be originally divided into stationary singnal and the large class of Dynamic Signal two according to the classifying sum of signal, therefore, the control module of the present embodiment stores two kinds of correcting modes to signal: transducer dwell gamma correction and Sensor's Dynamic Nonlinearity correct.The present embodiment just above-mentioned two kinds of gamma corrections is provided with embodiment respectively.
One, transducer dwell non-linear correction method
When only considering the static characteristics of sensor, the constrained input of sensor has the numerical relation determined, but has nothing to do with time variable in relational expression, can be expressed as with functional expression
(4)
In a static condition, if do not consider sluggishness and creep, the relation of the sensor constrained input of formula (4) can represent with a polynomials, claims this equation to be the static characteristics mathematical model of sensor, namely
(5)
In formula (5),
for input quantity;
for output quantity;
for input original bulk, be also
time output valve, namely zero-bit export (zero point drift);
for ideal (linearly) sensitivity of sensor; a
2, a
3, L, a
nfor nonlinear terms coefficient.Determine that characteristic form is also different when each term coefficient is different in formula (5).Their figure as shown in the figure, transducer dwell output curve diagram when Fig. 6 a is ideal linearity, Fig. 6 b is for without transducer dwell output curve diagram during even nonlinearity without transducer dwell output curve diagram during odd nonlinearity, Fig. 6 c; Transducer dwell output curve diagram when Fig. 6 d is generalized case.
When
time, can be considered ideal linearity, i.e. y=a
1x.As shown in Figure 6 a, a desirable sensor, wishes to have linear input/output relation, but the output of real sensor always has non-linear (i.e. time item) to exist.
In order to nonlinear error reduction, realize system input-output characteristic linearize, and according to the nonlinear model of sensor, utilize the correlation theory of numerical evaluation to correct it, realize test macro input x and export y=a
1the ideal line relation of x, concrete trimming process as shown in Figure 7.
The present embodiment selects simple look-up table when the gamma correction exported sensor, and look-up table is a kind of piecewise linear interpolation method, and it carries out segmentation according to accuracy requirement to anti-nonlinear curve, with some sections of broken line approximating curves.By break coordinate figure (Static Calibration of Sensor value) stored in TEDS tables of data, during TEDS sensing system access test macro, namely it be read into system.During measurement, first clear and definite corresponding input is measured
magnitude of voltage
in which section; Then carry out linear interpolation according to the slope of that section, obtain output valve
.
The present embodiment illustrates its specific works principle for three sections.As Fig. 8: wherein horizontal ordinate is
u 1,
u 2,
u 3,
u 4, ordinate is
x 1,
x 2,
x 3,
x 4.The output expression formula of each line segment is:
First paragraph:
(6);
Second segment:
(7);
3rd section:
(8);
If need the precision of sensor to improve further, then only need little for trying one's best of the difference of the arithmetic progression in sensor image data range setting, by horizontal ordinate divide as far as possible many, when the interval can released point according to the examples of three sections is greater than three sections, system output
the general formula of expression formula be
(9).In formula, k is the sequence number of break, and three broken lines have four breaks, k=1,2,3; x
krepresent the zero point drift of this line segment;
represent the sensitivity of this line segment.
The principle of work of the concrete gamma correction of the present embodiment is as shown in Figure 9: first control center carries out initialization to program, initialization horizontal ordinate u
1, u
2, u
3, u
4with ordinate x
1, x
2, x
3, x
4, the data of control center's receiving sensor transmission simultaneously, comprising the numerical value that sensor detects, and the data that the TEDS chip internal of sensor stores, the numerical value then sensor transmitted and minimum value u
1compare, if the numerical value gathered is less than or equal to u
1, then select k=1, and K be brought in formula (9), obtain the relational expression of input and output; And if the numerical value gathered is greater than u
1, then by the numerical value that collects and u
2compare, if the numerical value gathered is less than or equal to u
2, then select k=2, and k be brought in formula (9), obtain the relational expression of input and output; And if the numerical value gathered is greater than u
2, then by the numerical value that collects and u
3compare, if the numerical value gathered is less than or equal to u
3, then select k=3, and K be brought in formula (9), obtain the relational expression of input and output; And if the numerical value gathered is greater than u
3, then by the numerical value that collects and u
4compare, if the numerical value gathered is less than or equal to u
3, then select k=4, and K be brought in formula (9), obtain the relational expression of input and output; And if the numerical value gathered is greater than u
4, then the data overload of collection is described, control center must carry out overload process.
Said method carry out correcting utilize sensor calibration value as the coordinate figure of break, broken line and by the maximum error between the curve that approaches in the middle part of broken line, therefore the maximum error value that this error amount is not more than permission should be controlled
.The error symbol of each broken line is identical, or is just or be negative.
Two, sensor dynamic property corrects
The output when dynamic perfromance of sensor refers to that input quantity changes in time and the relation between input.The physical quantity great majority that in practical application, sensor detects are functions of time, for making the output signal of sensor can the change of reflected input signal timely and accurately, not only requiring that sensor has good static characteristics, more wishing the dynamic perfromance that it has had.
Acceleration transducer is a kind of sensor of typical measurement Dynamic Signal, therefore the present embodiment with the dynamic property of acceleration transducer be corrected to example to sensor dynamic property correct set forth.
Acceleration transducer is under acceleration effect, and its input and output differential equation is
(10)
In formula, in formula, m is Detection job, and k is rigidity, and c is ratio of damping, and y is the displacement of Detection job, and (10) formula is carried out Laplace transformation, and the transport function that can obtain input and output is
(11)
In formula,
for the natural resonance frequency of sensor;
for the damping ratio of sensor.It can thus be appreciated that acceleration transducer has step low-pass characteristic at frequency domain.At present, its damping ratio of engineering survey acceleration transducer is undesirable, and the damping ratio of piezoelectric acceleration transducer, generally between 0.01 ~ 0.3, limits its usable range.In order to ensure measuring accuracy and real-time, below the l/5 that upper limiting frequency in use should get natural resonance frequency is about 0. 707 with damping ratio, therefore needs to correct the type sensor.
The pole location of the dynamic perfromance of acceleration transducer and its transport function is closely related.According to the theory of the pole-zero cancellation in Automatic Control Theory, after acceleration transducer exports, a structure corrective network, adds new limit, the limit that cancellation is original, does not change its original zero point, the dynamic property of sensor is improved.Trimming process block diagram as shown in Figure 10.
Its concrete principle is as follows: construct one as
(12) correction link of formula, by formula (11), (12), know:
(13)
Wherein
value much larger than
, itself and original sensor model are in series, then its ssystem transfer function becomes C (S) (13) formula and remains second-order system, but due to
value much larger than
, the working band scope of acceleration transducer and dynamic responding speed obtain good improvement.Wherein
,
value just exist in TEDS when transducer calibration.So TEDS sensor one connecting system, its original parameter model H (s) (shown in 11 formulas) just establishes, and remaining work can be completed automatically by the control module of detection system.
In numerous acceleration transducer dynamic performance indexs, working band bandwidth sum dynamic responding speed weighs two important indicators of acceleration transducer dynamic property.Their quality restricts by the hardware condition such as materials and structures of sensor, and sensor is just difficult to change once produce.
In Figure 11, a curve is
when=0.1, the frequency response curve of system, in Figure 11, b curve is after correcting
the frequency response curve of system when=0.707.Can be known by the contrast of curve a, b, after correcting, the frequency response curve of sensor is more smooth, application frequency of operation Duan Gengchang.Effective working band upper limit, by the 3000Hz before correcting, expands to 10000 more than Hz after correction.This correction visible serves the effect of spread spectrum at frequency domain.
And Figure 12 is the curve that certain acceleration transducer is followed the tracks of in time domain a certain step signal in correction front and back.Wherein c corrects preacceleration sensor to the curve of pursuit of this step signal, and it is just being tending towards desired value after larger fluctuation.After correcting, namely curve d then tends towards stability after fuctuation within a narrow range.From the contrast of curve c, d, its response when time domain is followed the tracks of signal of the sensor after correction is more stable and rapid, and the error of introducing is less.
Can find out that the introducing of TEDS makes test macro improve the dynamic property of acceleration transducer by Figure 11, Figure 12 convenient.
In addition, because native system is that hyperchannel can Channels Synchronous Data Acquisition System, therefore system can also utilize other sensors survey data Data correction (fusion) carried out to improve its precision to certain sensor wherein.Such as utilize the measured value of system institute jointing temp sensor to carry out the measuring error of calibrating (base measuring) pressure sensor caused by temperature variation reason, and export accurate measured value.
(5) Data Analysis: the TEDS information of control module by reading, resolve the sensitivity being stored in sensor in TEDS information, the information such as zero point drift, computing is carried out to the digital signal after the dynamic property in gamma correction corrects, namely the signal after dynamic property being corrected, according to the up-to-date calibrated sensitivity of sensor, the slope of the straight-line segment (working range) of zero point drift determination curve and do not having under input condition, the output (error) of sensor, thus determine the expression formula of linear sensor section, thus computing is carried out to the input value of signal, rational engineering unit demarcated by the measured value that TEDS sensor exports the most at last.
(6) information aftertreatment: result by the data analysis after parsing, process, and shows by control module, stores simultaneously.
Claims (2)
1. an intelligent test system for new architecture, comprises conditioning module group, matrix switch module, data acquisition module, control module,
it is characterized in that:the automatic configuring matrix switch module of signal condition is provided with between described conditioning module group and outside TEDS sensor, described signal condition automatic configuring matrix switch module is provided with the row passage identical with outside TEDS number of sensors, and the row of channels identical with the quantity of the conditioning module in conditioning module group, the signal input part correspondence of each row passage connects the test signal output terminal of unique TEDS sensor, and each row of channels signal output part connects the signal input part of the conditioning module in unique corresponding conditioning module group;
The automatic configuring matrix switch module of signals collecting is provided with between conditioning module group and data acquisition module, described signals collecting automatic configuring matrix switch module is provided with the row of channels identical with the quantity of the conditioning module in conditioning module group, and the row passage identical with data acquisition module number of channels, the signal input part correspondence of each row of channels connects the signal output part of each conditioning module in unique conditioning module group, and the signal output part of each row passage is by data acquisition module link control module;
Described control module control linkage signal condition automatic configuring matrix switch module, the automatic configuring matrix switch module of signals collecting, also connect the TEDS information pin of outside TEDS sensor simultaneously by the automatic configuration module of TEDS matrix switch.
2. the intelligent test system of new architecture according to claim 1,
it is characterized in that:the automatic configuration module of described TEDS matrix switch is provided with the switching channels identical with outside TEDS number of sensors, is connected respectively by the TEDS sensor of each switching channels by correspondence with control module.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104501854A (en) * | 2014-12-05 | 2015-04-08 | 中国人民解放军军械工程学院 | Intelligent test system based on TEDS sensor and matrix switch technology and test method thereof |
| CN105571643A (en) * | 2016-01-18 | 2016-05-11 | 云南电网有限责任公司电力科学研究院 | Integrated general monitoring system for power transmission line |
| CN109120063A (en) * | 2017-06-22 | 2019-01-01 | 许继集团有限公司 | A kind of plug & play sensor monitoring method and its system and acquisition unit |
-
2014
- 2014-12-05 CN CN201420758015.XU patent/CN204330003U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104501854A (en) * | 2014-12-05 | 2015-04-08 | 中国人民解放军军械工程学院 | Intelligent test system based on TEDS sensor and matrix switch technology and test method thereof |
| CN105571643A (en) * | 2016-01-18 | 2016-05-11 | 云南电网有限责任公司电力科学研究院 | Integrated general monitoring system for power transmission line |
| CN105571643B (en) * | 2016-01-18 | 2018-03-23 | 云南电网有限责任公司电力科学研究院 | A kind of general monitoring system of transmission line of electricity integration |
| CN109120063A (en) * | 2017-06-22 | 2019-01-01 | 许继集团有限公司 | A kind of plug & play sensor monitoring method and its system and acquisition unit |
| CN109120063B (en) * | 2017-06-22 | 2020-10-30 | 许继集团有限公司 | Plug-and-play sensor monitoring method, system and acquisition unit thereof |
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