CN207318423U - Electromagnetic ultrasonic transducer control device and device - Google Patents
Electromagnetic ultrasonic transducer control device and device Download PDFInfo
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- CN207318423U CN207318423U CN201720827831.5U CN201720827831U CN207318423U CN 207318423 U CN207318423 U CN 207318423U CN 201720827831 U CN201720827831 U CN 201720827831U CN 207318423 U CN207318423 U CN 207318423U
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Abstract
The utility model discloses a kind of electromagnetic ultrasonic transducer control device and device.Wherein, which includes：Exciting bank, for generating the pumping signal to electromagnetic ultrasonic transducer EMAT into row energization；EMAT dominant frequency monitoring devices, for when EMAT is to detected object perform detection, whether the work dominant frequency for monitoring EMAT to shift；Control processor, in the case that the work dominant frequency for monitoring EMAT in EMAT dominant frequency monitoring devices shifts, is adjusted the pumping signal of exciting bank, and control EMAT performs the detection to detected object.The utility model solves in correlation technique and pumping signal can not be automatically adjusted, caused detection reliability and inefficient technical problem.
Description
Technical field
The utility model is related to field of non destructive testing, in particular to a kind of electromagnetic ultrasonic transducer control device with
And device.
Background technology
During atual detection, electromagnetic ultrasonic transducer (Electro Magnetic Acoustic Transducer,
Abbreviation EMAT) easily influenced by factors such as tested material, surface appearance, lift-off and temperature, cause electromagnetic ultrasonic transducer EMAT
Equivalent inductance, the parameter such as resistance changes so that static impedance matching network fails, and then causes sensor natural resonance
Frequency shifts.However, intrinsic frequency drift can cause the output power of sensor to reduce so that electromagnetic ultrasonic transducer
The conversion efficiency of EMAT substantially reduces.At present, when being detected in engineering using electromagnetic ultrasonic transducer EMAT, quilt is not considered
The influence to the centre frequency of electromagnetic ultrasonic transducer EMAT such as subject material, detection operating mode is examined, for example, for EMAT, is adopted more
Encouraged with the signal of fixed frequency.In addition, relevant electromagnetic acoustic detecting system can not follow electromagnetic acoustic bulk wave to pass
The change of sensor EMAT centre frequencies and adjust pumping signal, many times need the experience by testing staff to pumping signal
Manually adjusted, this adjustment mode can be low there are inconvenient for operation, reliability and influences detection efficiency and accuracy of detection
Problem, it is impossible to give full play of the detection advantage and detectability of electromagnetic acoustic bulk wave sensor EMAT.
For can not be automatically adjusted in above-mentioned correlation technique to pumping signal, caused detection reliability and efficiency are not
The problem of high, not yet propose effective solution at present.
Utility model content
The utility model embodiment provides a kind of electromagnetic ultrasonic transducer control device and device, at least to solve phase
Pumping signal can not be automatically adjusted in the technology of pass, caused detection reliability and inefficient technical problem.
According to the one side of the utility model embodiment, there is provided a kind of electromagnetic ultrasonic transducer control device, including：
Exciting bank, for generating the pumping signal to electromagnetic ultrasonic transducer EMAT into row energization；EMAT dominant frequency monitoring devices, are used for
When EMAT is to detected object perform detection, whether the work dominant frequency for monitoring EMAT shifts；Control processor, for
In the case that EMAT dominant frequency monitoring devices monitor that the work dominant frequency of EMAT shifts, the pumping signal of exciting bank is carried out
Adjustment, control EMAT perform the detection to detected object.
Alternatively, which further includes：Reception device, for receiving EMAT in chirp signal
Under to detected object perform detection when echo-signal；Control processor, the echo for being additionally operable to be received according to reception device are believed
The work dominant frequency of number definite EMAT, and EMAT is swashed into row energization according to definite work dominant frequency control exciting bank generation
Encourage signal.
Alternatively, reception device includes：Preamplifier, for carrying out preposition amplification to echo-signal；Signal amplifier,
For to being amplified again through the amplified signal of preamplifier；Signal picker, for amplifying through signal amplifier
Signal afterwards is acquired.
Alternatively, exciting bank includes：Signal generator, for generating the pumping signal to EMAT into row energization；Power
Amplifier, for being amplified to the pumping signal of signal generator, obtains amplified pumping signal.
According to another aspect of the utility model embodiment, a kind of electromagnetic ultrasonic transducer control system is additionally provided
System, including：Electromagnetic ultrasonic transducer EMAT devices and any one of above-mentioned EMAT control devices, wherein, EMAT devices include：
EMAT, detected object and the impedance matching network for matching impedance.
According to another aspect of the utility model embodiment, a kind of electromagnetic ultrasonic transducer controlling party is additionally provided
Method, including：Generate the pumping signal to electromagnetic ultrasonic transducer EMAT into row energization；In EMAT to detected object perform detection
When, whether the work dominant frequency for monitoring EMAT shifts；In the case where the work dominant frequency for monitoring EMAT shifts, to swashing
Encourage signal to be adjusted, control EMAT performs the detection to detected object.
Alternatively, generating includes the pumping signal of EMAT into row energization：EMAT is received under chirp signal to being detected
Echo-signal during object perform detection；The work dominant frequency of EMAT is determined according to echo-signal；Given birth to according to definite work dominant frequency
Pumping signals of the paired EMAT into row energization.
Alternatively, the work dominant frequency for determining EMAT according to echo-signal includes：Predetermined frequency band is gathered from echo-signal
Broadband detects signal；The narrow-band that predetermined number is decomposited from the broadband detection signal of collection detects signal；Determine pre-
Determine the work dominant frequency that the corresponding frequency of narrow-band detection signal optimal in the narrow-band detection signal of number is EMAT.
According to another aspect of the utility model embodiment, a kind of electromagnetic ultrasonic transducer control dress is additionally provided
Put, including：Generation module, for generating the pumping signal to electromagnetic ultrasonic transducer EMAT into row energization；Monitoring modular, is used for
When EMAT is to detected object perform detection, whether the work dominant frequency for monitoring EMAT shifts；Control module, for supervising
Measure EMAT work dominant frequency shift in the case of, pumping signal is adjusted, control EMAT perform to be detected pair
The detection of elephant.
Alternatively, generation module includes：Receiving unit, performs detected object under chirp signal for receiving EMAT
Echo-signal during detection；Determination unit, for determining the work dominant frequency of EMAT according to echo-signal；Generation unit, for root
The pumping signal to EMAT into row energization is generated according to definite work dominant frequency.
Optionally it is determined that unit includes：Subelement is gathered, for gathering the broadband inspection of predetermined frequency band from echo-signal
Survey signal；Subelement is decomposed, the narrow-band for decompositing predetermined number in signal for being detected from the broadband of collection detects signal；
Determination subelement, the narrow-band for determining predetermined number detect the corresponding frequency of narrow-band detection signal optimal in signal and are
The work dominant frequency of EMAT.
In the utility model embodiment, the pumping signal into row energization to electromagnetic ultrasonic transducer EMAT can be generated,
When EMAT is to detected object perform detection, whether the work dominant frequency for monitoring EMAT shifts, and is monitoring the work of EMAT
In the case that frequency of deciding shifts, pumping signal is adjusted, control EMAT performs the detection to detected object, realizes
Electromagnetic acoustic detecting system can follow the change of electromagnetic ultrasonic transducer EMAT centre frequencies and adjust the mesh of pumping signal
, reach the detection efficiency and accuracy of detection for improving electromagnetic acoustic detecting system, and then solve can not in correlation technique
Pumping signal is automatically adjusted, caused detection reliability and inefficient technical problem, have given full play to electromagnetism and surpassed
Sonic transducer EMAT is to detected object without abrasive material surface, without couplant, non-contact detecting, reproducible and appearance
The advantages of easy excitated various ultrasonic waves.
Brief description of the drawings
Attached drawing described herein is used to provide a further understanding of the present invention, and forms the part of the application,
The schematic description and description of the utility model is used to explain the utility model, does not form to the improper of the utility model
Limit.In the accompanying drawings：
Fig. 1 is the flow chart according to the electromagnetic ultrasonic transducer control method of the utility model embodiment；
Fig. 2 is the schematic diagram according to the linear chrip signal of the utility model embodiment；
Fig. 3 is the schematic diagram according to the narrow frequency pulse excitation signal of the utility model embodiment；
Fig. 4 is the flow chart according to the optional electromagnetic ultrasonic transducer control method of the utility model embodiment；
Fig. 5 is the schematic diagram according to the electromagnetic ultrasonic transducer control device of the utility model embodiment；
Fig. 6 is the schematic diagram according to the electromagnetic ultrasonic transducer control device of the utility model embodiment；
Fig. 7 is that the structure of generation module 61 in the electromagnetic ultrasonic transducer control device according to the utility model embodiment is shown
It is intended to；
Fig. 8 is to determine list in the electromagnetic ultrasonic transducer control device according to the utility model embodiment in generation module 61
The structure diagram of member 73；And
Fig. 9 is the schematic diagram according to the electromagnetic ultrasonic transducer control device of the preferred embodiment in the utility model.
Embodiment
It is real below in conjunction with the utility model in order to make those skilled in the art more fully understand the utility model
The attached drawing in example is applied, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that described
Embodiment is only the embodiment of the utility model part, instead of all the embodiments.Based on the reality in the utility model
Apply example, those of ordinary skill in the art's all other embodiments obtained without making creative work, all should
When the scope for belonging to the utility model protection.
It should be noted that term " first " in the specification and claims of the utility model and above-mentioned attached drawing,
" second " etc. is for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that so
The data used can exchange in the appropriate case, can be with except at this so as to the embodiment of the utility model described herein
In diagram or description those beyond order implement.In addition, term " comprising " and " having " and their any deformation, meaning
Figure be to cover it is non-exclusive include, for example, containing the process of series of steps or unit, method, system, product or equipment
Be not necessarily limited to those steps or the unit clearly listed, but may include not list clearly or for these processes,
The intrinsic other steps of method, product or equipment or unit.
For the ease of description, the part noun or term that occur in the utility model embodiment are illustrated below.
Signal-to-noise ratio：Also known as signal to noise ratio, refers to the ratio of signal and noise in an electronic equipment or electronic system.
Duplexer：It will launch and receive signal and be isolated, ensure to receive and transmitting can work normally at the same time.
According to the utility model embodiment, there is provided a kind of embodiment of the method for electromagnetic ultrasonic transducer control method, needs
It is noted that step shown in the flowchart of the accompanying drawings can be in the computer system of such as a group of computer-executable instructions
Middle execution, although also, show logical order in flow charts, in some cases, can be with different from herein
Order performs shown or described step.
Fig. 1 be according to the flow chart of the electromagnetic ultrasonic transducer control method of the utility model embodiment, as shown in Figure 1,
The electromagnetic ultrasonic transducer control method includes the following steps：
Step S102, generates the pumping signal into row energization to electromagnetic ultrasonic transducer EMAT.
Step S104, when EMAT is to detected object perform detection, whether the work dominant frequency for monitoring EMAT shifts.
Step S106, in the case where the work dominant frequency for monitoring EMAT shifts, is adjusted pumping signal, control
EMAT processed performs the detection to detected object.
By above-mentioned steps, the pumping signal into row energization to electromagnetic ultrasonic transducer EMAT can be generated, at EMAT pairs
During detected object perform detection, whether the work dominant frequency for monitoring EMAT shifts, and is sent out in the work dominant frequency for monitoring EMAT
In the case of raw offset, pumping signal is adjusted, control EMAT performs the detection to detected object, realizes electromagnetism and surpasses
Sound detection system can follow the change of electromagnetic ultrasonic transducer EMAT centre frequencies and adjust the purpose of pumping signal, reach
The detection efficiency and accuracy of detection of electromagnetic acoustic detecting system are improved, and then solve can not be to pumping signal in correlation technique
It is automatically adjusted, caused detection reliability and inefficient technical problem, have given full play to electromagnetic ultrasonic transducer
EMAT to detected object without abrasive material surface, it is each without couplant, non-contact detecting, reproducible and easy excitation
The advantages of kind ultrasonic wave.
In above-mentioned steps S102 into step S106, by generating the excitation to electromagnetic ultrasonic transducer EMAT into row energization
Signal, when EMAT is to detected object perform detection, whether the work dominant frequency for monitoring EMAT shifts, and is monitoring EMAT
Work dominant frequency shift in the case of, pumping signal is adjusted, realizes to detections of the EMAT to detected object, has
Effect reduce or eliminate electromagnetic ultrasonic transducer be subject to temperature, be detected material, be detected material surface appearance and
Lift-off causes the parameters such as equivalent inductance and the resistance of EMAT to change when the influence of factor so that static impedance matches
Network failure, and then cause the work dominant frequency of electromagnetic ultrasonic transducer to shift, the influence to EMAT detections.
It should be noted that when being adjusted to pumping signal, the frequency of pumping signal can be adjusted, also may be used
It is adjusted with the amplitude to pumping signal, adjustment can also be carried out at the same time to the frequency and amplitude of pumping signal at the same time.Can be with
Policy-flexible selection according to adjustment.
Wherein, various ways can be used when judging whether work dominant frequency shifts, it is for instance possible to use will obtain
Work dominant frequency be compared with the working frequency of a preassigned, judge the journey of the operating frequency offset relative to the standard
Degree, the degree according to offset determine whether work dominant frequency shifts.In another example can also be according to due to shifting and to it
Influenced caused by its sensor device, such as, according to the change size of the parameter of other sensor devices, so as to judge work
Whether dominant frequency shifts.
Various ways can be used to the pumping signal of EMAT into row energization by generating, for example, in order to make generation to EMAT
Pumping signal into row energization is more accurate, and the pumping signal of EMAT into row energization can be included by generating：EMAT is received in Zhou
Echo-signal when singing under signal to detected object perform detection；The work dominant frequency of EMAT is determined according to echo-signal；According to
Definite work dominant frequency generates the pumping signal to EMAT into row energization.Specifically, detected object is being carried out using EMAT
During detection, electromagnetic ultrasonic transducer can generate the linear chrip signal excitation EMAT of a broadband frequency band, be produced in detected object
Raw electromagnetic ultrasonic wave is detected, and receives echo-signal, is then docked after received echo-signal handled, according to place
Echo-signal after reason determines the work dominant frequency f of EMATc, it is f then to generate frequency according to the work dominant frequency of EMATcReality swash
Signal is encouraged, excitation EMAT is detected detected object, and whether the dominant frequency of detection EMAT work in real time occurs in detection process
Offset, in the event shifting occurs, the work dominant frequency to EMAT redefines；In the case where not shifting,
Then continue to detect.
It should be noted that linear chrip signal referred in the range of certain time, the letter that frequency changes linearly over time
Number, as shown in Fig. 2, wherein, Fig. 2 is the schematic diagram according to the linear chrip signal of the utility model embodiment.Believed using chirp
Number excitation electromagnetic ultrasonic transducer EMAT be detected, the response of one section of wide frequency range can be obtained in one-time detection, collection
Detection response signal when the different tuning signal of centre frequency encourages is obtained after the response signal, is believed by analyzing these responses
Number, obtain the centre frequency (that is to say, work dominant frequency) of EMAT.
Wherein, linear chrip signal can be determined by the first formula, and the first formula is：Wherein, W (t) is window function, f0For initial frequency, T is the duration of chirp signal, B
For the frequency bandwidth of chirp signal,Change with time rate for frequency.If Fig. 1 is the linear Zhou that is defined according to the first formula
Sing signal, initial frequency f0=1MHz, frequency bandwidth B=4MHz (frequency range is 1~5MHz), duration T=10 μ s, W
(t) it is rectangular window, window grows 10.5 μ s.
Next, when being detected using electromagnetic ultrasonic transducer EMAT, by signal source output drive signal, through overpower
Input pickup after amplifier amplification；Realize that electroacoustic is changed by electromagnetic ultrasonic transducer EMAT and detected object, tested
Coupling in expecting of measuring and monitoring the growth of standing timber produces ultrasonic wave；Ultrasonic wave runs into defect or material boundary produces echo-signal, and echo-signal is by electromagnetism
Sonac EMAT is changed by electroacoustic, is received by signal picker, the model of whole electromagnetic acoustic detecting system can lead to
The expression of the second formula is crossed, wherein, the second formula is：VR(ω)=Vi(ω)tG(ω)tA(ω)tR(ω), wherein, ViBelieve for input
Number, tGFor the transmission function of electroacoustic transfer process, tAThe transmission function for being ultrasonic wave in checked object, tRTo receive echo letter
The transmission function of number process, VRTo detect signal.
In addition, using linear chrip signal to electromagnetic ultrasonic transducer EMAT into row energization when, the response signal that detects
It can be represented by the 3rd formula, wherein the 3rd formula is：VR(ω)=S (ω) tG(ω)tA(ω)tR(ω), wherein, S (ω)
For linear chrip signal, detection response VRIn contain the corresponding detection signal of broadband excitation signals, surpass to obtain electromagnetism
The work dominant frequency of sonic transducer EMAT decomposites narrow, it is necessary to signal progress reprocessing analysis from broadband detection signal
Frequency detects the detection signal of signal, then each narrow frequency range of comparative analysis, and determines the work dominant frequency of EMAT.I.e. according to echo-signal
Determining the work dominant frequency of EMAT can include：The broadband detection signal of predetermined frequency band is gathered from echo-signal；From collection
The narrow-band detection signal of predetermined number is decomposited in broadband detection signal；In the narrow-band detection signal for determining predetermined number
The work dominant frequency that the optimal corresponding frequency of narrow-band detection signal is EMAT.
Wherein it is determined that the mode of the work dominant frequency of EMAT include it is a variety of, it is for instance possible to use in the following manner is realized：
Assuming that a narrow frequency signal for being actually used in excitation electromagnetic ultrasonic transducer EMAT is SE(ω), as shown in figure 3, its
In, Fig. 3 is peaceful for the Chinese according to the schematic diagram of the narrow frequency pulse excitation signal of the utility model embodiment, narrow frequency pulse excitation signal
Window modulated sinusoid, centre frequency 3.5MHz, periodicity 5.Due to system transterIt is constant, this
When the obtained response signal of detecting system can be represented by the 4th formula, wherein, the 4th formula is：The 3rd formula of summary and the 4th formula, according to linear chrip signal S (ω) excitations
When the electromagnetic acoustic detecting system detection response signal V that getsR(ω), can solve in the range of linear chrip signal band
The response of system, method for solving can be determined by the 5th formula during any one narrow frequency signal excitation, wherein, the 5th formula
For：After the system response of corresponding each narrow frequency signal in the range of linear chrip signal band is obtained,
The detection response of each narrow frequency signal of comparative analysis, determines the optimal narrow frequency range of response signal, is electromagnetic ultrasonic transducer EMAT
Work dominant frequency.
One complete embodiment of the utility model is described in detail below in conjunction with the accompanying drawings.
Fig. 4 is according to the flow chart of the optional electromagnetic ultrasonic transducer control method of the utility model embodiment, such as Fig. 4
Shown, which includes the following steps：
Step S401, starts to detect.
Step S402, linear chrip signal excitation electromagnetic ultrasonic transducer EMAT.
Step S403, electromagnetic ultrasonic transducer EMAT receives echo-signals.
Step S404, the work dominant frequency of electromagnetic ultrasonic transducer EMAT is obtained based on the echo-signal received.
Step S405, judges whether work dominant frequency shifts.Where it has, step S402 is returned to, conversely, holding
Row step S406.
Step S406, generates the pumping signal of work dominant frequency.
Step S407, encourages EMAT to be detected using the pumping signal for generating work dominant frequency.
Step S408, detection of end.
A kind of electromagnetic ultrasonic transducer control device is provided in the present embodiment, and Fig. 5 is implemented according to the utility model
The schematic diagram of the electromagnetic ultrasonic transducer control device of example, as shown in figure 5, the electromagnetic ultrasonic transducer control device includes：Swash
Encourage device 51, EMAT dominant frequency monitoring device 53 and control processor 55, below to the electromagnetic ultrasonic transducer control device into
Row describes in detail.
Exciting bank 51, in pumping signal of the generation to electromagnetic ultrasonic transducer EMAT into row energization.
EMAT dominant frequency monitoring device 53, is connected with above-mentioned exciting bank 51, for performing inspection to detected object in EMAT
During survey, whether the work dominant frequency for monitoring EMAT shifts.
Control processor 55, is connected with above-mentioned EMAT dominant frequency monitoring device 53, for being monitored in EMAT dominant frequency monitoring device
To EMAT work dominant frequency shift in the case of, the pumping signal of exciting bank is adjusted, control EMAT perform pair
The detection of detected object.
Alternatively, which further includes：Reception device, for receiving EMAT in chirp signal
Under to detected object perform detection when echo-signal；Control processor, the echo for being additionally operable to be received according to reception device are believed
The work dominant frequency of number definite EMAT, and EMAT is swashed into row energization according to definite work dominant frequency control exciting bank generation
Encourage signal.
Alternatively, reception device includes：Preamplifier, for carrying out preposition amplification to echo-signal；Signal amplifier,
For to being amplified again through the amplified signal of preamplifier；Signal picker, for amplifying through signal amplifier
Signal afterwards is acquired.
Alternatively, exciting bank includes：Signal generator, for generating the pumping signal to EMAT into row energization；Power
Amplifier, for being amplified to the pumping signal of signal generator, obtains amplified pumping signal.
Based on above-mentioned electromagnetic ultrasonic transducer control device, in the utility model embodiment, a kind of electromagnetism is additionally provided
Sonac control system, the system include：EMAT controls described in electromagnetic ultrasonic transducer EMAT devices and any of the above-described
Control equipment, wherein, EMAT devices include：EMAT, detected object and the impedance matching network for matching impedance.Wherein, should
Impedance matching network is used for realization the matching of EMAT and EMAT external impedances.
In the preferred embodiment, a kind of electromagnetic ultrasonic transducer control device is additionally provided, it is necessary to explanation, this Shen
Please embodiment electromagnetic ultrasonic transducer control device can be used for perform the embodiment of the present application provided be used for electromagnetic acoustic
Sensor control method.Electromagnetic ultrasonic transducer control device provided by the embodiments of the present application is introduced below.
Fig. 6 be according to the schematic diagram of the electromagnetic ultrasonic transducer control device of the utility model embodiment, as shown in fig. 6,
The electromagnetic ultrasonic transducer control device includes：Generation module 61, monitoring modular 63 and control module 65.Below to the electromagnetism
Sonac control device is described in detail.
Generation module 61, for generating the pumping signal to electromagnetic ultrasonic transducer EMAT into row energization.
Monitoring modular 63, is connected with above-mentioned generation module 61, for when EMAT is to detected object perform detection, monitoring
Whether the work dominant frequency of EMAT shifts.
Control module 65, is connected with above-mentioned monitoring modular 63, for what is shifted in the work dominant frequency for monitoring EMAT
In the case of, pumping signal is adjusted, control EMAT performs the detection to detected object.
The electromagnetic ultrasonic transducer control device that the utility model embodiment provides, by generation module 61, for generating
Pumping signal to electromagnetic ultrasonic transducer EMAT into row energization；Monitoring modular 63, is connected with above-mentioned generation module 61, for
When EMAT is to detected object perform detection, whether the work dominant frequency for monitoring EMAT shifts；Control module 65, with above-mentioned prison
Survey module 63 to connect, in the case of shifting in the work dominant frequency for monitoring EMAT, pumping signal is adjusted, control
EMAT processed performs the detection to detected object.Electromagnetic ultrasonic transducer is effectively reduced or eliminates to be subject to temperature, be detected
Material, the surface appearance of detected material and lift-off measure and monitor the growth of standing timber when the influence of factor, causes the equivalent inductance and resistance of EMAT
Change etc. parameter so that static impedance matching network fails, and then causes the work dominant frequency of electromagnetic ultrasonic transducer to occur
Offset, the influence to EMAT detections.
Fig. 7 is that the structure of generation module 61 in the electromagnetic ultrasonic transducer control device according to the utility model embodiment is shown
It is intended to, as shown in fig. 7, in addition to the structure shown in Fig. 6, which includes：Receiving unit 71, determination unit 73 and generation
Unit 75, below illustrates the generation module 61.
Receiving unit 71, for receive EMAT under chirp signal to detected object perform detection when echo-signal；
Determination unit 73, is connected to above-mentioned receiving unit 71, for determining the work dominant frequency of EMAT according to echo-signal；Generation unit
75, above-mentioned determination unit 73 is connected to, for generating the pumping signal to EMAT into row energization according to definite work dominant frequency.
Fig. 8 is to determine list in the electromagnetic ultrasonic transducer control device according to the utility model embodiment in generation module 61
The structure diagram of member 73, as shown in figure 8, in addition to the structure shown in Fig. 7, which includes：Subelement 81 is gathered, point
Subelement 83 and determination subelement 85 are solved, the determination unit 73 is illustrated below.
Subelement 81 is gathered, the broadband for gathering predetermined frequency band from echo-signal detects signal；Decompose subelement
83, above-mentioned collection subelement 81 is connected to, decomposites the narrow-band of predetermined number in signal for being detected from the broadband of collection
Detect signal；Determination subelement 85, is connected to above-mentioned decomposition subelement 83, and the narrow-band for determining predetermined number detects signal
In the corresponding frequency of optimal narrow-band detection signal be EMAT work dominant frequency.
One in the utility model embodiment complete embodiment is described in detail below.
Fig. 9 is according to the schematic diagram of the electromagnetic ultrasonic transducer control device of the preferred embodiment in the utility model, such as Fig. 9 institutes
Show, which includes, control processor, exciting bank, duplexer, reception device, sensor portion
Point and EMAT, wherein, exciting bank can include signal generator and power amplifier, and signal generator can generate arbitrarily
The pumping signal (for example, linear chrip signal) of waveform, these pumping signals encourage electromagnetism sense after power amplifier amplifies
Inductive sensing device；Reception device includes preamplifier, signal amplifier and signal picker, and signal is detected for receiving；Pass
Sensor part includes electromagnetic ultrasonic transducer EMAT, test specimen and impedance matching network, for detected object perform detection；
EMAT dominant frequency monitoring device is used for the change of detection EMAT work dominant frequency, and feed back to control in real time in sensor senses process
Processor is handled；Control processor control EMAT excitations and detection echo signal reception, processing sensor detecting main frequencies letter
Number.
A kind of electromagnetic ultrasonic transducer control device provided by the utility model embodiment, in electromagnetic ultrasonic transducer
Adjust automatically pumping signal in EMAT detection process, ensures that electromagnetic ultrasonic transducer EMAT works under frequency of heart wherein, to subtract
Influence small or that elimination sensor frequency shift is to detection.
Since electromagnetic ultrasonic transducer includes bias magnetic field, high frequency coil etc., and electromagnetic ultrasonic transducer is launched at work
The pumping signal of certain frequency produces ultrasonic wave, Jin Ershi under bias magnetic field effect to high frequency coil in workpiece is detected
Existing electromagnetic acoustic detection.Electromagnetic ultrasonic transducer because with without abrasive material surface, without couplant, non-contact detecting, again
Renaturation is good and easily excites many merits such as various ultrasonic waves, and is widely used in thickness measurement online, high temperature detection, automation
The field of non destructive testing such as detection.
According to another aspect of the utility model embodiment, a kind of storage medium is additionally provided, states storage medium bag
The program of storage is included, wherein, equipment where controlling storage medium when program is run performs following operation：Generation passes electromagnetic acoustic
Pumping signals of the sensor EMAT into row energization；When EMAT is to detected object perform detection, monitoring the work dominant frequency of EMAT is
It is no to shift；In the case where the work dominant frequency for monitoring EMAT shifts, pumping signal is adjusted, controls EMAT
Perform the detection to detected object.
According to another aspect of the utility model embodiment, a kind of processor is additionally provided, processor is used to run
Program, wherein, following operation is performed when program is run：Generate the pumping signal to electromagnetic ultrasonic transducer EMAT into row energization；
When EMAT is to detected object perform detection, whether the work dominant frequency for monitoring EMAT shifts；Monitoring the work of EMAT
In the case that frequency of deciding shifts, pumping signal is adjusted, control EMAT performs the detection to detected object.
Above-mentioned the utility model embodiment sequence number is for illustration only, does not represent the quality of embodiment.
In above-described embodiment of the utility model, the description to each embodiment all emphasizes particularly on different fields, in some embodiment
The part not being described in detail, may refer to the associated description of other embodiment.
In several embodiments provided herein, it should be understood that disclosed technology contents, can pass through others
Mode is realized.Wherein, device embodiment described above is only schematical, such as the division of unit, can be one kind
Division of logic function, can there is an other dividing mode when actually realizing, such as multiple units or component can combine or can
To be integrated into another system, or some features can be ignored, or not perform.Another, shown or discussed is mutual
Coupling, direct-coupling or communication connection can be by some interfaces, the INDIRECT COUPLING or communication connection of unit or module,
Can be electrical or other forms.
The unit illustrated as separating component may or may not be physically separate, be shown as unit
Component may or may not be physical location, you can with positioned at a place, or can also be distributed to multiple units
On.Some or all of unit therein can be selected to realize the purpose of this embodiment scheme according to the actual needs.
In addition, each functional unit in each embodiment of the utility model can be integrated in a processing unit,
Can be that unit is individually physically present, can also two or more units integrate in a unit.It is above-mentioned integrated
Unit can both be realized in the form of hardware, can also be realized in the form of SFU software functional unit.
If integrated unit is realized in the form of SFU software functional unit and is used as independent production marketing or in use, can
To be stored in a computer read/write memory medium.Based on such understanding, the technical solution of the utility model is substantially
The part to contribute in other words to the prior art or all or part of the technical solution can be in the form of software products
Embody, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or network equipment etc.) performs the complete of each embodiment the method for the utility model
Portion or part steps.And foregoing storage medium includes：USB flash disk, read-only storage (ROM, Read-Only Memory), deposit at random
Access to memory (RAM, Random Access Memory), mobile hard disk, magnetic disc or CD etc. are various can be with storage program generation
The medium of code.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these improve and
Retouching also should be regarded as the scope of protection of the utility model.
Claims (8)
- A kind of 1. electromagnetic ultrasonic transducer control device, it is characterised in that including：Exciting bank, for generating the pumping signal to electromagnetic ultrasonic transducer EMAT into row energization；EMAT dominant frequency monitoring devices, for when the EMAT is to detected object perform detection, monitoring the work of the EMAT Whether dominant frequency shifts；Control processor, the feelings that the work dominant frequency for monitoring the EMAT in the EMAT dominant frequency monitoring device shifts Under condition, the pumping signal of the exciting bank is adjusted, controls the EMAT to perform to the detected object Detection.
- 2. equipment according to claim 1, it is characterised in that further include：Reception device, for receive the EMAT under chirp signal to the detected object perform detection when echo letter Number；The control processor, is additionally operable to determine the work of the EMAT according to the echo-signal that the reception device receives Dominant frequency, and control the exciting bank generation to swash the EMAT into the described of row energization according to the definite work dominant frequency Encourage signal.
- 3. equipment according to claim 2, it is characterised in that the reception device includes：Preamplifier, for carrying out preposition amplification to the echo-signal；Signal amplifier, for being amplified again through the amplified signal of the preamplifier；Signal picker, for being acquired through the amplified signal of the signal amplifier.
- 4. equipment according to claim 1, it is characterised in that the exciting bank includes：Signal generator, for generating the pumping signal to the EMAT into row energization；Power amplifier, for being amplified to the pumping signal of the signal generator, obtains the amplified excitation letter Number.
- A kind of 5. electromagnetic ultrasonic transducer control system, it is characterised in that including：Electromagnetic ultrasonic transducer EMAT devices and right It is required that the EMAT control devices any one of 1 to 4, wherein, the EMAT devices include：EMAT, detected object and use In the impedance matching network of matching impedance.
- A kind of 6. electromagnetic ultrasonic transducer control device, it is characterised in that including：Generation module, for generating the pumping signal to electromagnetic ultrasonic transducer EMAT into row energization；Monitoring modular, for when the EMAT is to detected object perform detection, monitor the EMAT work dominant frequency whether Shift；Control module, in the case of shifting in the work dominant frequency for monitoring the EMAT, to the pumping signal into Row adjustment, controls the EMAT to perform the detection to the detected object.
- 7. device according to claim 6, it is characterised in that the generation module includes：Receiving unit, for receive the EMAT under chirp signal to the detected object perform detection when echo letter Number；Determination unit, for determining the work dominant frequency of the EMAT according to the echo-signal；Generation unit, for generating the pumping signal to the EMAT into row energization according to the definite work dominant frequency.
- 8. device according to claim 7, it is characterised in that the determination unit includes：Subelement is gathered, the broadband for gathering predetermined frequency band from the echo-signal detects signal；Subelement is decomposed, the narrow-band for decompositing predetermined number in signal for being detected from the broadband of collection detects letter Number；Determination subelement, the narrow-band for determining the predetermined number detect narrow-band detection signal optimal in signal and correspond to Frequency be the EMAT the work dominant frequency.
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| CN201720827831.5U CN207318423U (en) | 2017-07-10 | 2017-07-10 | Electromagnetic ultrasonic transducer control device and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109239205A (en) * | 2017-07-10 | 2019-01-18 | 中国特种设备检测研究院 | Electromagnetic ultrasonic transducer controls equipment, method and device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109239205A (en) * | 2017-07-10 | 2019-01-18 | 中国特种设备检测研究院 | Electromagnetic ultrasonic transducer controls equipment, method and device |
| CN109239205B (en) * | 2017-07-10 | 2024-04-09 | 中国特种设备检测研究院 | Electromagnetic ultrasonic sensor control equipment, method and device |
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