CN106691508A - Testing method and testing system for system transfer function of ultrasonic diasonograph - Google Patents

Testing method and testing system for system transfer function of ultrasonic diasonograph Download PDF

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Publication number
CN106691508A
CN106691508A CN201710054696.XA CN201710054696A CN106691508A CN 106691508 A CN106691508 A CN 106691508A CN 201710054696 A CN201710054696 A CN 201710054696A CN 106691508 A CN106691508 A CN 106691508A
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diasonograph
transfer function
signal
ssystem transfer
testing
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孙凤
郭建军
吴方刚
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Vinno Technology Suzhou Co Ltd
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Vinno Technology Suzhou Co Ltd
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/58—Testing, adjusting or calibrating the diagnostic device
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/58—Testing, adjusting or calibrating the diagnostic device
    • A61B8/582—Remote testing of the device
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/52017—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00 particularly adapted to short-range imaging
    • G01S7/5205—Means for monitoring or calibrating

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  • General Health & Medical Sciences (AREA)
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  • General Physics & Mathematics (AREA)
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Abstract

The invention provides a testing method and a testing system of a system transfer function of an ultrasonic diasonograph. The testing method comprises the following steps of setting a transmission pulse signal for the ultrasonic diasonograph, and obtaining a response curve of an ultrasonic transducer and an output signal of the ultrasonic diasonograph; directly obtaining the system transfer function of the ultrasonic diasonograph according to the transmission pulse signal and the output signal of the corresponding ultrasonic diasonograph hand the response curve of the ultrasonic transducer. During a whole testing process, basic data are all used for digital signal collection, operation and processing, so that quantitative description of the system transfer function is realized; according to the testing method and the testing system, a signal transmission flow is considered and is consistent with a signal transmission link of an ultrasonic scanning system in actual work, additional hardware equipment is not needed, very strong accuracy and higher practicability are obtained, and the testing cost is saved; in addition, a testing environment and the operation are simple, the testing time is short, and the testing efficiency is improved.

Description

The method of testing and test system of the ssystem transfer function of diasonograph
Technical field
A kind of system present invention is mainly applied to medical ultrasonic diagnostic technical field, more particularly to diasonograph is transmitted The method of testing and test system of function.
Background technology
With the development of the related-art technologies such as electronics, computer, material science；Ultrasonic imaging is because its is non-invasive, real The many advantages such as Shi Xing, easy to operate, cheap, become the auxiliary diagnosis being clinically most widely used means it One.
Wherein, for the diasonograph of ultrasonic imaging, it is made up of many submodules, is a complexity and huge is System, it is difficult to the characteristic such as the response of quantitative description whole system, transfer function, but quantitatively descriptive system response, understand instrument Transmission characteristic is necessary to understanding and improving systematic function.The side of quantitative measurement system transfer function can be used at present Method and equipment are the instruments such as Network Analyzer, sweep generator, and in these testers, Network Analyzer is latest model, function compared with A kind of many instruments.
Network Analyzer is that a kind of being scanned in certain frequency band is measured to determine the new type measuring instrument device of network parameter, Amplitude, the phase-frequency characteristic of parameter are given with sweep method, transmission function can be measured with dual-port；But, due to network Analyzer measures characteristic parameter in the way of frequency sweep, therefore with a characteristic for frequency can only be measured in synchronization；If needed Wide-band is measured, then needs to be scanned each working frequency points measurement, it is thus desirable to configure longer sweep time；Its Secondary, due to the working characteristics of Network Analyzer itself, it receives distributed constant etc. to influence fairly obvious；Therefore, network point is being used Before analyzer, it is necessary to which it is calibrated, so that it relies on very big to the validity calibrated；Again, Network Analyzer etc. is similar to Instrument price it is expensive, high cost is, it is necessary to pay use cost higher.
The content of the invention
In order to solve the above problems, it is an object of the invention to provide a kind of survey of the ssystem transfer function of diasonograph Method for testing and test system.
Accordingly, an embodiment of the present invention provide diasonograph ssystem transfer function method of testing include with Lower step：S1, it is that diasonograph sets transmitting pulse signal, and obtains the response curve and the ultrasound of ultrasonic transducer The output signal of diagnostic equipment；
S2, transmitting pulse signal, output signal according to the correspondence diasonograph, and the ultrasonic transducer The ssystem transfer function of response curve direct access diasonograph.
Used as the further improvement of an embodiment of the present invention, before the step S1, methods described also includes：
Preset test environment, it includes：
The ultrasonic transducer is positioned in normal temperature waters；
The surface and steel target surface for making the ultrasonic transducer are substantially parallel.
Used as the further improvement of an embodiment of the present invention, the step S1 is specifically included：
The in response to belt of the diasonograph of a width of required detection of band of the transmitting pulse signal of the diasonograph is set It is wide；
And adjust work aperture to minimum number.
Used as the further improvement of an embodiment of the present invention, the step S2 is specifically included：
The system transmission of diasonograph is obtained from the time-domain signal being input between output according to the diasonograph Function；
Its expression formula is：Sout=Sin*Himp*Himp*Hsy,
Wherein, SoutRepresent the output signal of the diasonograph, HimtThe response curve of the ultrasonic transducer is represented, SinIt is expressed as the transmitting pulse signal that the diasonograph is set, HsySsystem transfer function is represented, * represents convolution algorithm.
Used as the further improvement of an embodiment of the present invention, the step S2 is specifically included：
The system transmission of diasonograph is obtained from the frequency-region signal being input between output according to the diasonograph Function；
Its expression formula is：
Wherein, HsySsystem transfer function is represented, FT represents Fourier transformation, SoutRepresent the output of the diasonograph Signal, HimtRepresent the response curve of the ultrasonic transducer, SinIt is expressed as the transmitting pulse letter that the diasonograph is set Number.
Correspondingly, in order to realize the foregoing invention first purpose, an embodiment of the present invention provides a kind of diasonograph The test system of ssystem transfer function, the system includes：Transmitter module, for setting transmitting pulse letter for diasonograph Number；
Signal acquisition module, sets transmitting pulse signal, and obtain ultrasonic transducer for recording diasonograph The output signal of response curve and the diasonograph；
Signal processing module, for transmitting pulse signal, output signal according to the correspondence diasonograph, Yi Jisuo State the ssystem transfer function of the response curve direct access diasonograph of ultrasonic transducer.
Used as the further improvement of an embodiment of the present invention, the system also includes：Preset module；
The preset module is used to be positioned over the ultrasonic transducer in normal temperature waters；
The surface and steel target surface for making the ultrasonic transducer are substantially parallel.
Used as the further improvement of an embodiment of the present invention, the transmitter module is additionally operable to：The Ultrasonic Diagnosis is set The responsive bandwidth of the diasonograph of detection needed for the band of the transmitting pulse signal of instrument is a width of；And adjustment work aperture is to minimum Quantity.
As the further improvement of an embodiment of the present invention, the signal processing module specifically for：According to described super Audio clinic instrument obtains the ssystem transfer function of diasonograph from the time-domain signal being input between output；
Its expression formula is：Sout=Sin*Himp*Himp*Hsy,
Wherein, SoutRepresent the output signal of the diasonograph, HimtThe response curve of the ultrasonic transducer is represented, SinIt is expressed as the transmitting pulse signal that the diasonograph is set, HsySsystem transfer function is represented, * represents convolution algorithm.
As the further improvement of an embodiment of the present invention, the signal processing module specifically for：
The system transmission of diasonograph is obtained from the frequency-region signal being input between output according to the diasonograph Function；
Its expression formula is：
Wherein, HsySsystem transfer function is represented, FT represents Fourier transformation, SoutRepresent the output of the diasonograph Signal, HimtRepresent the response curve of the ultrasonic transducer, SinIt is expressed as the transmitting pulse letter that the diasonograph is set Number.
Compared with prior art, the method for testing and test system of the ssystem transfer function of diasonograph of the invention, Because in whole test process, the basic data for using is collection, computing and the treatment of data signal, in this way, realizing The quantitative description of ssystem transfer function；Above-mentioned method of testing and test system consider transport stream signal, in real work Ultrasonic scan system signal transmission link it is consistent, without increasing extra hardware device, be based only upon diasonograph in itself The hardware device having can complete test, with very strong accuracy and practicality, save testing cost；In addition, surveying Test ring border and simple to operate, the testing time is short, improves testing efficiency.
Brief description of the drawings
Fig. 1 is the flow chart of the method for testing of the ssystem transfer function of diasonograph in an embodiment of the present invention；
Fig. 2 is the structural representation of the test system of the ssystem transfer function of diasonograph in an embodiment of the present invention
Fig. 3 is the schematic diagram of the transmitting pulse signal that an embodiment of the present invention is set for diasonograph；
Fig. 4 is the schematic diagram of the response curve of ultrasonic transducer in an embodiment of the present invention；
Fig. 5 is the schematic diagram of the ADC/RF signals of output in an embodiment of the present invention.
Specific embodiment
Below with reference to each implementation method shown in the drawings, the present invention will be described in detail.But these implementation methods are not The limitation present invention, structure, method or change functionally that one of ordinary skill in the art is made according to these implementation methods Change and be all contained in protection scope of the present invention.
The present invention can quantitative description diasonograph system transfer performance, testing efficiency and accuracy can be improved again； Signal transmission link is completely the same during scanning real-time with ultrasonic scan system during re-test of the present invention, in this way, reducing test Low cost.
As shown in figure 1, in an embodiment of the present invention the ssystem transfer function of diasonograph method of testing, it is described Method is comprised the following steps：
S1, it is that diasonograph sets transmitting pulse signal, and obtains the response curve of ultrasonic transducer and described super The output signal of audio clinic instrument；
In a preferred embodiment of the invention, the step S1 is specifically included：The transmitting arteries and veins of the diasonograph is set Rush the responsive bandwidth of the diasonograph of a width of required detection of band of signal；And adjust work aperture to minimum number.
It is that the transmitting pulse signal that the diasonograph is set is broadband laser pulse, example in a specific example of the invention Such as：Shown in Fig. 3 of the invention, Fig. 3 is the transmitting pulse signal that an embodiment of the present invention is the diasonograph setting Schematic diagram.
In adjustment work aperture to minimal number of implementing, work aperture is generally set to 1 primitive.
Under normal circumstances, the work aperture for being formed in transmitting near-field region is relatively fewer, is formed in transmitting far-field region Work aperture is relatively more.
In a preferred embodiment of the invention, before the step S1, methods described also includes：
Preset test environment, it includes：The ultrasonic transducer is positioned in normal temperature waters；Make the ultrasonic transducer Surface be substantially parallel with steel target surface；In this way, making the transmitting pulse signal of input after shown transducer sends, in steel target Surface produces the echo-signal of total reflection, is tested under this kind of test environment, decays especially small, can almost ignore not Meter, so, it is ensured that the echo-signal free of losses of acquisition, the echo-signal obtained at this is in foregoing description content be related to defeated Go out signal, herein below also will be described in detail.
The response curve of the ultrasonic transducer described in present embodiment step S1, generally when diasonograph dispatches from the factory i.e. Can be given with equipment, in addition, it can also be obtained in diasonograph running, be not described in detail herein.The present invention In one specific example, the response curve of the ultrasonic transducer of acquisition, such as shown in Fig. 4, Fig. 4 is surpassed in an embodiment of the present invention The schematic diagram of the response curve of sonic transducer.
Output signal described in present embodiment step S1 is obtained automatically by the diasonograph under above-mentioned test environment , its acquisition modes has various, is the common knowledge of this area, is not described in detail herein.
It should be noted that the output signal in present embodiment is ADC signal, can also be in some embodiments RF signals；
The ADC signal is the RF signals before Beam synthesis；In the specific embodiment of the invention, if work aperture is 1 Individual primitive, then ADC signal is identical with RF signals.If work aperture is more than 1 primitive, output signal only can be ADC signal, So, it is to avoid because the output signal that Beam synthesis cause produces change.In a specific example of the invention, due to the work of test environment Make aperture selection for 1 primitive, then the output signal for obtaining, such as shown in Fig. 5, Fig. 5 is exported in an embodiment of the present invention ADC/RF signals schematic diagram.
Further, in an embodiment of the present invention, the method for testing of the ssystem transfer function of the diasonograph is also Including：
S2, transmitting pulse signal, output signal according to the correspondence diasonograph, and the ultrasonic transducer The ssystem transfer function of response curve direct access diasonograph.
What ssystem transfer function of the invention was characterized is that transmitting pulse signal is launched to ultrasonic transducer, is put by simulation Greatly, after the change of a series of signal such as analog-to-digital conversion, in final output ADC signal or/RF signal process, the transmission of diasonograph Characteristic.
In specific embodiment of the invention, the ssystem transfer function of diasonograph can be obtained by two ways.
Specifically, in first embodiment of the invention, the step S2 is specifically included：According to the diasonograph from defeated Enter to the time-domain signal between output to obtain the ssystem transfer function of diasonograph；
The expression formula of the time-domain signal is：
Sout=Sin*Himp*Himp*Hsy,
Wherein, SoutRepresent the output signal of the diasonograph, HimtThe response curve of the ultrasonic transducer is represented, SinIt is expressed as the transmitting pulse signal that the diasonograph is set, HsySsystem transfer function is represented, * represents convolution algorithm.
In a further embodiment of the present invention, the step S2 is specifically included：
The system transmission of diasonograph is obtained from the frequency-region signal being input between output according to the diasonograph Function；
The expression formula of the frequency-region signal is：
Wherein, HsySsystem transfer function is represented, FT represents Fourier transformation, SoutRepresent the output of the diasonograph Signal, HimtRepresent the response curve of the ultrasonic transducer, SinIt is expressed as the transmitting pulse letter that the diasonograph is set Number.
Further, the ssystem transfer function of acquisition can as needed be preserved and/or exported, ssystem transfer function Can be input into the way of image, for example：One width system transfer function curve, is not described in detail herein.
As described above, obtaining ssystem transfer function of the diasonograph in broadband, the ssystem transfer function reacts The circuit for producing high voltage of diasonograph, transducer and diasonograph signal transmission, front-end control, the biography of analog-to-digital conversion link Defeated characteristic, while the system performance of the diasonograph can be characterized.
With reference to shown in Fig. 2, in an embodiment of the present invention, a kind of test of the ssystem transfer function of diasonograph is disclosed System, the test system includes：Transmitter module 100, signal acquisition module 200, signal processing module 300 and preset module 400。
Transmitter module 100 for diasonograph for setting transmitting pulse signal；Signal acquisition module 200 is used to remember Record diasonograph sets transmitting pulse signal, and the response curve and the diasonograph for obtaining ultrasonic transducer Output signal.
In an of the invention preferred embodiment, transmitter module 100 specifically for：The transmitting arteries and veins of the diasonograph is set Rush the responsive bandwidth of the diasonograph of a width of required detection of band of signal；And adjust work aperture to minimum number.
In a specific example of the invention, transmitter module 100 is that the transmitting pulse signal that the diasonograph is set is width Frequency band pulse, for example：Shown in Fig. 3 of the invention, Fig. 3 is the transmitting that an embodiment of the present invention is the diasonograph setting The schematic diagram of pulse signal.
During transmitter module 100 is used to adjust work aperture to minimal number of implementing, generally work aperture is set It is 1 primitive.
Under normal circumstances, the work aperture for being formed in transmitting near-field region is relatively fewer, is formed in transmitting far-field region Work aperture is relatively more.
In an of the invention preferred embodiment, preset module 400 is used for preset test environment, and it is by the ultrasonic transducer It is positioned in normal temperature waters；The surface and steel target surface for making the ultrasonic transducer are substantially parallel；In this way, making the transmitting arteries and veins of input Signal is rushed after shown transducer sends, the echo-signal of total reflection is produced on steel target surface, entered under this kind of test environment Row test, decays especially small, almost can be ignored, so, it is ensured that the echo-signal free of losses of acquisition, and what is obtained at this returns Ripple signal is the output signal being related in foregoing description content, and herein below also will be described in detail.
The response curve of the ultrasonic transducer of foregoing description, can be given generally when diasonograph dispatches from the factory with equipment, In addition, it can also be obtained in diasonograph running, it is not described in detail herein.In a specific example of the invention, The response curve of the ultrasonic transducer of acquisition, such as shown in Fig. 4, Fig. 4 is the sound of ultrasonic transducer in an embodiment of the present invention Answer the schematic diagram of curve.
The output signal of foregoing description is automatically obtained by the diasonograph under above-mentioned test environment, and its acquisition modes has It is various, the common knowledge of this area is, it is not described in detail herein.
It should be noted that the output signal in present embodiment is ADC signal, can also be in some embodiments RF signals；
The ADC signal is the RF signals before Beam synthesis；In the specific embodiment of the invention, if work aperture is 1 Individual primitive, then ADC signal is identical with RF signals.If work aperture is more than 1 primitive, output signal only can be ADC signal, So, it is to avoid because the output signal that Beam synthesis cause produces change.In a specific example of the invention, due to the work of test environment Make aperture selection for 1 primitive, then the output signal for obtaining, such as shown in Fig. 5, Fig. 5 is exported in an embodiment of the present invention ADC/RF signals schematic diagram.
Further, in an embodiment of the present invention, signal processing module 300 is used for：According to the correspondence Ultrasonic Diagnosis The transmitting pulse signal of instrument, output signal, and the response curve direct access diasonograph of the ultrasonic transducer is System transmission function.
What ssystem transfer function of the invention was characterized is that transmitting pulse signal is launched to ultrasonic transducer, is put by simulation Greatly, after the change of a series of signal such as analog-to-digital conversion, in final output ADC signal or/RF signal process, the transmission of diasonograph Characteristic.
In specific embodiment of the invention, the ssystem transfer function of diasonograph can be obtained by two ways.
Specifically, in first embodiment of the invention, signal processing module 300 specifically for：According to the Ultrasonic Diagnosis Instrument obtains the ssystem transfer function of diasonograph from the time-domain signal being input between output；
The expression formula of the time-domain signal is：
Sout=Sin*Himp*Himp*Hsy,
Wherein, SoutRepresent the output signal of the diasonograph, HimtThe response curve of the ultrasonic transducer is represented, SinIt is expressed as the transmitting pulse signal that the diasonograph is set, HsySsystem transfer function is represented, * represents convolution algorithm.
In a further embodiment of the present invention, signal processing module 300 specifically for：According to the diasonograph from input The ssystem transfer function of diasonograph is obtained to the frequency-region signal between output；
The expression formula of the frequency-region signal is：
Wherein, HsySsystem transfer function is represented, FT represents Fourier transformation, SoutRepresent the output of the diasonograph Signal, HimtRepresent the response curve of the ultrasonic transducer, SinIt is expressed as the transmitting pulse letter that the diasonograph is set Number.
Further, the ssystem transfer function of acquisition can as needed be preserved and/or exported, ssystem transfer function Can be input into the way of image, for example：One width system transfer function curve, is not described in detail herein.
As described above, obtaining ssystem transfer function of the diasonograph in broadband, the ssystem transfer function reacts The circuit for producing high voltage of diasonograph, transducer and diasonograph signal transmission, front-end control, the biography of analog-to-digital conversion link Defeated characteristic, while the system performance of the diasonograph can be characterized.
In sum, the method for testing and test system of the ssystem transfer function of diasonograph of the invention, due to In whole test process, the basic data for using is collection, computing and the treatment of data signal, in this way, realizing system biography The quantitative description of delivery function；Above-mentioned method of testing and test system consider transport stream signal, with the ultrasound in real work The signal transmission link of scanning system is consistent, without increasing extra hardware device, is based only upon what diasonograph had in itself Hardware device can complete test, with very strong accuracy and practicality, save testing cost；In addition, test environment With it is simple to operate, the testing time is short, improves testing efficiency.
For convenience of description, it is divided into various modules with function during description apparatus above to describe respectively.Certainly, this is being implemented The function of each module can be realized in same or multiple softwares and/or hardware during application.
As seen through the above description of the embodiments, those skilled in the art can be understood that the application can Realized by the mode of software plus required general hardware platform.Based on such understanding, the technical scheme essence of the application On the part that is contributed to prior art in other words can be embodied in the form of software product, the computer software product Can be stored in preservation medium, such as ROM/RAM, magnetic disc, CD, including some instructions are used to so that a computer equipment (can be personal computer, Information Push Server, or network equipment etc.) performs each implementation method of the application or reality Apply the method described in some parts of mode.
Device embodiments described above are only schematical, wherein the module illustrated as separating component Can be or may not be physically separate, the part shown as module can be or may not be physics mould Block, you can with positioned at a place, or can also be distributed on multiple mixed-media network modules mixed-medias.It can according to the actual needs be selected In some or all of module realize the purpose of present embodiment scheme.Those of ordinary skill in the art are not paying creation Property work in the case of, you can to understand and implement.
The application can be used in numerous general or special purpose computing system environments or configuration.For example：Personal computer, information Push server computer, handheld device or portable set, laptop device, multi-processing module system, based on microprocessor mould The system of block, set top box, programmable consumer-elcetronics devices, network PC, minicom, mainframe computer, including taking up an official post DCE of what system or equipment etc..
The application can be described in the general context of computer executable instructions, such as program Module.Usually, program module includes performing particular task or realizes routine, program, object, the group of particular abstract data type Part, data structure etc..The application can also be in a distributed computing environment put into practice, in these DCEs, by Remote processing devices connected by communication network perform task.In a distributed computing environment, program module can be with In medium being preserved positioned at the local and remote computer including preserving including equipment.
It should be understood that, although the present specification is described in terms of embodiments, but not each implementation method only includes one Individual independent technical scheme, this narrating mode of specification is only that for clarity, those skilled in the art will should say Used as an entirety, technical scheme in each implementation method can also be through appropriately combined, and forming those skilled in the art can for bright book With the other embodiment for understanding.
Those listed above is a series of to be described in detail only for feasibility implementation method of the invention specifically Bright, they simultaneously are not used to limit the scope of the invention, all equivalent implementations made without departing from skill spirit of the present invention Or change should be included within the scope of the present invention.

Claims (10)

1. a kind of method of testing of the ssystem transfer function of diasonograph, it is characterised in that the described method comprises the following steps：
S1, it is that diasonograph sets transmitting pulse signal, and obtains the response curve and the ultrasound of ultrasonic transducer and examine The output signal of disconnected instrument；
The response of S2, transmitting pulse signal, output signal according to the correspondence diasonograph, and the ultrasonic transducer The ssystem transfer function of curve direct access diasonograph.
2. the method for testing of the ssystem transfer function of diasonograph according to claim 1, it is characterised in that the step Before rapid S1, methods described also includes：
Preset test environment, it includes：
The ultrasonic transducer is positioned in normal temperature waters；
The surface and steel target surface for making the ultrasonic transducer are substantially parallel.
3. the method for testing of the ssystem transfer function of diasonograph according to claim 2, it is characterised in that the step Rapid S1 is specifically included：
The responsive bandwidth of the diasonograph of a width of required detection of band of the transmitting pulse signal of the diasonograph is set；
And adjust work aperture to minimum number.
4. the method for testing of the ssystem transfer function of diasonograph according to claim 1, it is characterised in that the step Rapid S2 is specifically included：
The ssystem transfer function of diasonograph is obtained from the time-domain signal being input between output according to the diasonograph；
Its expression formula is：Sout=Sin*Himp*Himp*Hsy,
Wherein, SoutRepresent the output signal of the diasonograph, HimtRepresent the response curve of the ultrasonic transducer, SinTable It is shown as the transmitting pulse signal that the diasonograph is set, HsySsystem transfer function is represented, * represents convolution algorithm.
5. the method for testing of the ssystem transfer function of diasonograph according to claim 1, it is characterised in that the step Rapid S2 is specifically included：
The ssystem transfer function of diasonograph is obtained from the frequency-region signal being input between output according to the diasonograph；
Its expression formula is：
Wherein, HsySsystem transfer function is represented, FT represents Fourier transformation, SoutThe output signal of the diasonograph is represented, HimtRepresent the response curve of the ultrasonic transducer, SinIt is expressed as the transmitting pulse signal that the diasonograph is set.
6. a kind of test system of the ssystem transfer function of diasonograph, it is characterised in that the system includes：
Transmitter module, for setting transmitting pulse signal for diasonograph；
Signal acquisition module, transmitting pulse signal, and the response for obtaining ultrasonic transducer are set for recording diasonograph The output signal of curve and the diasonograph；
Signal processing module, it is for transmitting pulse signal, output signal according to the correspondence diasonograph and described super The ssystem transfer function of the response curve direct access diasonograph of sonic transducer.
7. the test system of the ssystem transfer function of diasonograph according to claim 6, it is characterised in that the system Also include：Preset module；
The preset module is used to be positioned over the ultrasonic transducer in normal temperature waters；
The surface and steel target surface for making the ultrasonic transducer are substantially parallel.
8. the test system of the ssystem transfer function of diasonograph according to claim 6, it is characterised in that the transmitting Module is additionally operable to：
The responsive bandwidth of the diasonograph of a width of required detection of band of the transmitting pulse signal of the diasonograph is set；
And adjust work aperture to minimum number.
9. the test system of the ssystem transfer function of diasonograph according to claim 6, it is characterised in that the signal Processing module specifically for：
The ssystem transfer function of diasonograph is obtained from the time-domain signal being input between output according to the diasonograph；
Its expression formula is：Sout=Sin*Himp*Himp*Hsy,
Wherein, SoutRepresent the output signal of the diasonograph, HimtRepresent the response curve of the ultrasonic transducer, SinTable It is shown as the transmitting pulse signal that the diasonograph is set, HsySsystem transfer function is represented, * represents convolution algorithm.
10. the test system of the ssystem transfer function of diasonograph according to claim 6, it is characterised in that the letter Number processing module specifically for：
The ssystem transfer function of diasonograph is obtained from the frequency-region signal being input between output according to the diasonograph；
Its expression formula is：
Wherein, HsySsystem transfer function is represented, FT represents Fourier transformation, SoutThe output signal of the diasonograph is represented, HimtRepresent the response curve of the ultrasonic transducer, SinIt is expressed as the transmitting pulse signal that the diasonograph is set.
CN201710054696.XA 2017-01-24 2017-01-24 Testing method and testing system for system transfer function of ultrasonic diasonograph Withdrawn CN106691508A (en)

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* Cited by examiner, † Cited by third party
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