CN104330480A - Fault diagnosis method for ultrasonic phased array imaging detector - Google Patents
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Abstract
The invention relates to a fault diagnosis method for an ultrasonic phased array imaging detector, fault conditions of a transmitting channel and a receiving channel, in which a currently-excited energy converter array element is, are determined by comparing signal peak-to-peak value and amplitude threshold of a transmitting signal and an interface echo signal, wherein the transmitting signal is used to judge whether the transmitting is in a fault, and the interface echo signal from a to-be-measured object to is used to judge whether the receiving channel is in a fault. Due to simultaneous fault diagnosis of a transmitting circuit, a receiving circuit, a high voltage switch chip, the energy converter array element and hardware connection lines of the ultrasonic phased array imaging detector, the fault diagnosis method can provide guarantee for the high reliability working of the ultrasonic phased array imaging detector, and by automatic analysis of test results, the specific location and the type of the faults can be determined.
Description
Technical field
The present invention relates to the technical field that ultrasonic phased array imaging detects, particularly relate to a kind of method for diagnosing faults for ultrasonic phased array imaging detector.
Background technology
Ultrasonic phase array detection technique is a kind of ultrasonic non-destructive inspection techniques that developed recently gets up, and this technology can improve the signal to noise ratio (S/N ratio) of detection speed and detection signal, has the features such as quick, reliable, accurate.The topmost feature of ultrasonic phased array technology is the mode adopting supersonic array transmitting and array received, by controlling time delay and the amplitude of each array element pumping signal on array, to generate multi-form automatically controlled sound field, adopt electronic zooming means can control shape and the direction of acoustic beam easily, realize dynamic focusing, scanning and detection.The appearance of ultrasonic phased array technology improves line accuracy of detection, substantially increases detection speed simultaneously.
But be connected complexity with signal based on the imaging detecting instrument of ultrasonic phase array due to himself Circuits System, the phase array transducer array element quantity used also wants many in more non-ultrasonic phase array checkout equipment, and this just causes the more non-ultrasonic phase array checkout equipment of the out of order possibility of ultrasonic phased array imaging detector to want high.The fault of ultrasonic phased array imaging detector self can affect its accuracy of detection greatly, especially requires high occasion at some for detection confidence, and the fault diagnosis for ultrasonic phased array imaging detector self is necessary very much.
In ultrasonic phased array imaging detector, transducer is made up of multiple array element, and each array element can transmit separately according to focusing rule and receive echoed signal.In order to strengthen the amplitude of echoed signal and be convenient to detection testee, generally all need to carry out filtering process and the rear wave beam of time delay superposition last formation synthesis to the multi-path echo signal received.If one or more data channel breaks down, error is produced to last synthesis wave beam, but this error may be difficult to estimate because of the uncertainty of fault type and quantity again.Therefore, when analyzing ultrasonic phased array imaging detector fault, the data validity obtained is detected to testee and is difficult to assessment.
Application number be 201010117392.1 Chinese patent disclose a kind of array element signals energy variation that utilizes to identify the method for phase array transducer incomplete data, but the method just carries out fault detect but not whole Phased-array circuit system for the array element of phased array, the method is the Fault Identification utilizing the reflection echo energy after running into defect that transmits to carry out phase array transducer array element simultaneously, and when defective locations is complicated, Detection results is undesirable.
Summary of the invention
In order to solve the above-mentioned technical matters of ultrasonic phased array imaging detector of the prior art, the invention provides a kind of method for diagnosing faults for ultrasonic phased array imaging detector, utilize this method for diagnosing faults, fault diagnosis can have been carried out to the transceiver circuit of ultrasonic phased array imaging detector, switch chip, transducer array element and hard wires simultaneously, and carry out automatic analysis according to testing result, thus determine and the particular location of localizing faults and type.
To achieve these goals, the invention provides a kind of method for diagnosing faults for ultrasonic phased array imaging detector, described ultrasonic phased array imaging detector comprises: host computer, high-voltage switch gear chip, emission control module, fault detection module, radiating circuit, receiving circuit and A/D sampling module, it is characterized in that, this method for diagnosing faults comprises:
Host computer described in step 1) arranges detection time, amplitude threshold and detects number of times, and described detection time is the time range that Waves Investigation for Interface Echo Signal may occur, described amplitude threshold comprises to be launched amplitude threshold and receives amplitude threshold;
Step 2) described in emission control module produce emissioning controling signal, the transducer array element of this gating specific quantity of the high-voltage switch gear chip described in control and position is fired simultaneously;
Radiating circuit described in step 3) is connected with transducer array element by high-voltage switch gear chip, and described radiating circuit produces and transmits, and this transmits by step 2) in the transducer array element that is excited complete transmitting;
Receiving circuit described in step 4) is connected with transducer array element by high-voltage switch gear chip, described receiving circuit receive from radiating circuit transmit and from the Waves Investigation for Interface Echo Signal of measured object;
Waves Investigation for Interface Echo Signal is carried out digital quantization by the A/D sampling module described in step 5), and the Waves Investigation for Interface Echo Signal feeding fault detection module after digital quantization is carried out amplitude differentiation;
Fault detection module described in step 6) obtains the current transducer array element positional information be excited, record the current transducer array element be excited transmitting and the maximal value of Waves Investigation for Interface Echo Signal and minimum value within described detection time, and judge the current transmission channel at transducer array element place that is excited and the failure condition of receiving cable by comparison signal peak-to-peak value and amplitude threshold, upgrade the error logging table of corresponding transducer array element, notice host computer reads the error logging table of all transducer array element;
The error logging table of all transducer array elements that step 7) host computer is obtained by fault detection module, the type of automatic fault location and position.
As the further improvement of technique scheme, described detection time carries out calculating to try to achieve to the sound path of testee and the sampling rate of A/D sampling module according to transducer.
As the further improvement of technique scheme, described amplitude threshold is obtained by the empirical data of testee, and the scope of this amplitude threshold is less than the threshold range transmitted normally with Waves Investigation for Interface Echo Signal.
As the further improvement of technique scheme, in described step 7), the type of localizing faults and the method for position comprise:
The transducer array element controlled when described radiating circuit or receiving circuit is all made mistakes, then the radiating circuit that the transducer array element of makeing mistakes is corresponding or receiving circuit break down;
The transducer array element part controlled when described radiating circuit or receiving circuit is made mistakes, then the radiating circuit that the transducer array element of makeing mistakes is corresponding or receiving circuit job insecurity;
The transducer array element controlled when described high-voltage switch gear chip is all made mistakes, but receiving circuit receives from transmitting of radiating circuit all correct, then high-voltage switch gear chip corresponding to the transducer array element of makeing mistakes breaks down;
The transducer array element part controlled when described high-voltage switch gear chip is made mistakes, but receiving circuit receives from transmitting of radiating circuit all correct, then the transducer array element Wiring faults that the transducer array element of makeing mistakes is damaged or high-voltage switch gear chip is made mistakes to this.
As the further improvement of technique scheme, described ultrasonic phased array imaging detector also comprises: buffer circuit; Transmitting and receiving circuit is kept apart by described buffer circuit, and carries out amplitude limit to receiving circuit.
As the further improvement of technique scheme, described transducer array element adopts internal loopback probe.
As the further improvement of technique scheme, described fault detection module and emission control module installation are in same processor.
A kind of method for diagnosing faults for ultrasonic phased array imaging detector of the present invention, its advantage is:
First, utilize and to transmit and Waves Investigation for Interface Echo Signal judges the current transmission channel at transducer array element place that is excited and the failure condition of receiving cable by comparison signal peak-to-peak value and amplitude threshold, wherein transmit for differentiating whether transmission channel breaks down, and be used for differentiating whether receiving cable breaks down from the Waves Investigation for Interface Echo Signal of testee, due to simultaneously to the radiating circuit of ultrasonic phased array imaging detector, receiving circuit, high-voltage switch gear chip, transducer array element and hard wires have carried out fault diagnosis, the present invention is that the highly reliable work of ultrasonic phased array imaging detector provides guarantee.
Secondly, when ultrasonic phased array imaging detector normally works, can carry out in real time on-line checkingi automatically to ultrasonic phased array imaging detector, its failure diagnostic process does not reduce the detection efficiency and precision that ultrasonic phased array imaging detector normally works.
Again, can according to testing result automatic analysis, thus determine and the particular location of localizing faults and type, for the fault diagnosis of ultrasonic phased array imaging detector and analysis provide conveniently.
Accompanying drawing explanation
Fig. 1 is the structural representation of ultrasonic phased array imaging detector of the present invention.
Fig. 2 is a kind of method for diagnosing faults schematic diagram for ultrasonic phased array imaging detector in the embodiment of the present invention.
Fig. 3 is that the present invention carries out the schematic diagram of fault diagnosis according to transmitted wave and interface echo.
Fig. 4 is the structural representation of a kind of ultrasonic phased array imaging detector in the embodiment of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, a kind of method for diagnosing faults for ultrasonic phased array imaging detector of the present invention is described in detail.
As shown in Figure 1, ultrasonic phased array imaging detector of the present invention comprises: host computer, high-voltage switch gear chip, emission control module, fault detection module, radiating circuit, receiving circuit and A/D sampling module;
Described host computer is used for arranging detection time, amplitude threshold and detecting number of times, the type of automatic fault location and position, described detection time is the time range that Waves Investigation for Interface Echo Signal may occur, described amplitude threshold comprises to be launched amplitude threshold and receives amplitude threshold;
Described emission control module is for generation of emissioning controling signal, and the transducer array element controlling each gating specific quantity of high-voltage switch gear chip and position is fired simultaneously;
Described fault detection module is for obtaining the current transducer array element positional information be excited, record the current transducer array element be excited transmitting and the maximal value of Waves Investigation for Interface Echo Signal and minimum value within described detection time, and judge the current transmission channel at transducer array element place that is excited and the failure condition of receiving cable by comparison signal peak-to-peak value and amplitude threshold, upgrade the error logging table of corresponding transducer array element, notice host computer reads the error logging table of all transducer array element;
Described high-voltage switch gear chip turns off for the connected sum controlling each transducer array element in ultrasonic phased array imaging detector, to realize controlling the transmission channel at each transducer array element place and the switching of receiving cable;
Described radiating circuit is for generation of transmitting;
Described receiving circuit for receive from radiating circuit transmit and from the Waves Investigation for Interface Echo Signal of measured object;
Described A/D sampling module is responsible for Waves Investigation for Interface Echo Signal to carry out digital quantization.
As shown in Figure 2, based on above-mentioned ultrasonic phased array imaging detector, the invention provides a kind of method for diagnosing faults for ultrasonic phased array imaging detector, the method comprises:
Host computer described in step 1) arranges detection time, amplitude threshold and detects number of times, and described detection time is the time range that Waves Investigation for Interface Echo Signal may occur, described amplitude threshold comprises to be launched amplitude threshold and receives amplitude threshold;
Step 2) described in emission control module produce emissioning controling signal, the transducer array element of this gating specific quantity of the high-voltage switch gear chip described in control and position is fired simultaneously;
Radiating circuit described in step 3) is connected with transducer array element by high-voltage switch gear chip, and described radiating circuit produces and transmits, and this transmits by step 2) in the transducer array element that is excited complete transmitting;
Receiving circuit described in step 4) is connected with transducer array element by high-voltage switch gear chip, described receiving circuit receive from radiating circuit transmit and from the Waves Investigation for Interface Echo Signal of measured object;
Waves Investigation for Interface Echo Signal is carried out digital quantization by the A/D sampling module described in step 5), and the Waves Investigation for Interface Echo Signal feeding fault detection module after digital quantization is carried out amplitude differentiation;
Fault detection module described in step 6) obtains the current transducer array element positional information be excited, record the current transducer array element be excited transmitting and the maximal value of Waves Investigation for Interface Echo Signal and minimum value within described detection time, and judge the current transmission channel at transducer array element place that is excited and the failure condition of receiving cable by comparison signal peak-to-peak value and amplitude threshold, upgrade the error logging table of corresponding transducer array element, notice host computer reads the error logging table of all transducer array element;
The error logging table of all transducer array elements that step 7) host computer is obtained by fault detection module, the type of automatic fault location and position.
Based on the above-mentioned method for diagnosing faults for ultrasonic phased array imaging detector, described amplitude threshold is obtained by the empirical data of testee, and the scope of this amplitude threshold is less than the threshold range transmitted normally with Waves Investigation for Interface Echo Signal;
Wherein, the autonomous channel number be at every turn excited due to ultrasonic phased array imaging detector is certain, fault detection module is each only to be detected for this transducer array element be excited and related channel program, and the failure condition of all passages needs by repeatedly transmitting until all passage traversals of transducer once could detect; When the detection number of times arranged by host computer is 1, show that all transmission channels and receiving cable all need traversal one time, namely all transducer array element all needs the transmitting carrying out a signal, simultaneously according to transmit and Waves Investigation for Interface Echo Signal carries out fault analysis, in order to ensure the confidence level of fault detect further, detect number of times to realize repeated detection by arranging, thus reduce undetected and probability that is flase drop.
In order to enable fault detection module efficiently work, optimization process can be done to this transducer array element be excited the need of detection.Assuming that the autonomous channel number of ultrasonic phased array imaging detector is 16, the saltus step spacing of the adjacent transducer array element be excited for twice is 1, ceaselessly switched fast by high-voltage switch gear chip, make each moment excite different transducer array element to transmit and reception interface echoed signal.Such as, a certain moment, to being numbered 1,2,3 ..., 16 transducer array element excite, make it transmit and receive the Waves Investigation for Interface Echo Signal from testee; Subsequent time, to being numbered 2,3,4 ..., 17 transducer array element excite, by that analogy.Due to preceding signal transmitting and receiving to being numbered 1,2,3 ..., 16 transducer array element detect, again to being numbered 2,3,4,, 17 transducer array element detect, then numbering of part can be caused to be 2,3,4 ..., 16 transducer array element detect existing repetition.In order to avoid this kind of situation, following setting can be done, that is:
This detects initial array element=last time and detects initial array element+autonomous channel number
Like this, what this detected initial array element is numbered 16, only have when being numbered 17,18,19 ..., 32 transducer array element just these array elements are detected when being excited; Certainly, the saltus step spacing of the adjacent transducer array element be excited for twice be not 1 situation need more careful consideration, make all transducer array element to be detected and to have higher detection efficiency.
Based on the above-mentioned method for diagnosing faults for ultrasonic phased array imaging detector, be set by host computer detection time, make described method for diagnosing faults can adapt to the spacing of transducer to testee or the change of testee size.
The moment definition that transmitted waveform can start to produce by the reference point of detection time was 0 moment, namely can be defaulted as 0 the initial detection time of transmitted wave, the initial detection time of interface echo then needs to carry out calculating to try to achieve to the sound path of testee and the sampling rate of A/D sampling module according to transducer.Its velocity of sound of sound bearing medium between known transducers and testee is v, its vertical range is h, and the incident angle of acoustic beam is the sample frequency of β, A/D sampling module is fs, it is t that then self-emission waveform generation reflects to an interface echo time arriving transducer again, then:
t＝2×h/cosβ/v
Fault detection module, can the data depth of locating interface echoed signal after the sampling of A/D sampling module according to t and sample frequency fs time of arrival, thus carries out waveform recording and analysis in suitable data depth to Waves Investigation for Interface Echo Signal.Certainly, in the present invention, detection time can not be tolerance with absolute time, but the storage depth of waveform is consistent with the corresponding relation of time.
Shown in Fig. 3, described transducer array element can adopt internal loopback to pop one's head in, can receive from radiating circuit transmit and from the Waves Investigation for Interface Echo Signal of measured object, wherein transmit for differentiating whether transmission channel breaks down, and be used for differentiating whether receiving cable breaks down from the Waves Investigation for Interface Echo Signal of testee.Ultrasonic phased array imaging detector in Fig. 3 is also provided with buffer circuit, this buffer circuit is used for high pressure radiating circuit and low pressure receiving circuit to keep apart, and amplitude limit is carried out to low pressure receiving circuit, thus prevent from high pressure from transmitting causing damage to low pressure receiving circuit, can ensure that again low pressure Waves Investigation for Interface Echo Signal can zero-decrement arrival low pressure receiving circuit simultaneously.That is, this buffer circuit can allow transmitted waveform to pass through while protection low pressure receiving circuit, thus makes can to receive high pressure at low pressure receiving circuit simultaneously and transmit and low pressure Waves Investigation for Interface Echo Signal.
Utilize transmit the reflection echo energy after running into defect or amplitude to carry out the Fault Identification of ultrasonic phased array imaging detector, when defective locations is complicated or be difficult to detect, fault detect effect is undesirable.Utilize transmitted wave and interface echo that the present invention proposes carry out fault diagnosis to ultrasonic phased array imaging detector, can make full use of transmitted wave and interface echo holds facile advantage, are convenient to the diagnosing malfunction to ultrasonic phased array imaging detector and analysis.
As Fig. 4 shows the structure of a kind of ultrasonic phased array imaging detector in embodiment, the total array number of transducer of ultrasonic phased array imaging detector is 128, autonomous channel number is 16, each high-voltage switch gear chip all carries out the switching of transducer array element by controlling the different transducer array element in 8 tunnels, all transducer array unit compositions phase array transducer.Emission control module produces emissioning controling signal, and the transducer array element controlling each gating specific quantity of high-voltage switch gear chip and position is fired simultaneously; And by controlling repeatedly to transmit to realize all transducer array elements of phased array switch operating successively, be responsible for carrying out to each radiating circuit focusing and the deflection that delays time to control realizes acoustic beam simultaneously; The current transducer array element positional information be excited is obtained by fault detection module, record the current transducer array element be excited transmitting and the maximal value of Waves Investigation for Interface Echo Signal and minimum value within described detection time, and judge the current transmission channel at transducer array element place that is excited and the failure condition of receiving cable by comparison signal peak-to-peak value and amplitude threshold, upgrade the error logging table of corresponding transducer array element.In order to the positional information that fault detection module can be allowed to obtain the current transducer array element be excited easily, fault detection module and emission control module can be arranged in same processor, are such as arranged in same fpga chip.
The transducer array element quantity that high-voltage switch gear chip controls is determined by the quantity of the input/output port of this high-voltage switch gear chip self, and the present embodiment just gives a kind of embodiment.But its essence of different embodiments formed by the type changing high-voltage switch gear matrix is identical.The numbering of the transducer array element that high-voltage switch gear chip controls can change, but does not generally make a high-voltage switch gear chip controls continuous print transducer array element.
As can be seen from the structure of the ultrasonic phased array imaging detector in Fig. 4, the Waves Investigation for Interface Echo Signal that receiving cable receives is the reflection configuration transmitted when running into testee surface being excited generation by transmission channel, transmission channel goes wrong, then receiving cable can not receive any Waves Investigation for Interface Echo Signal; Whether receiving cable is normally associated with the normal work of transducer array element, high-voltage switch gear chip, hard wires and receiving circuit, and whether transmission channel is normally associated with the normal work of transducer array element, high-voltage switch gear chip, hard wires and radiating circuit; When wherein any one element failure, all can cause effective Waves Investigation for Interface Echo Signal being detected.In the present embodiment, the switching of each high-voltage switch gear chip controls No. 8 transducer array element, when its cisco unity malfunction, the equal cisco unity malfunction of No. 8 transducer array element that this high-voltage switch gear chip controls; Each road radiating circuit or receiving circuit are all connected with corresponding No. 8 transducer array elements by high-voltage switch gear chip simultaneously, when this road radiating circuit or receiving circuit cisco unity malfunction, with the equal cisco unity malfunction of No. 8 transducer array element in the same connecting circuit of this road radiating circuit or receiving circuit place.Therefore, the error logging table of all transducer array elements that host computer is obtained by fault detection module, can the type of automatic fault location and position.Shown in the type of localizing faults and the method for position see the following form:
Therefore, the present invention can carry out automatic analysis according to testing result, thus determines and the particular location of localizing faults and type, for the fault diagnosis of ultrasonic phased array imaging detector and analysis provide conveniently.
Also can be found out by the structure of the ultrasonic phased array imaging detector in Fig. 4, the signal obtained from A/D sampling module is analyzed by fault detection module, record the current transducer array element be excited transmitting and the maximal value of Waves Investigation for Interface Echo Signal and minimum value within described detection time, and this fault detection module does not affect A/D sampling module to normal data treatment schemees such as the time delay superposition of signal and Beam synthesis, because fault detection module can be carried out respectively with these signal processing flows.Therefore, method for diagnosing faults of the present invention under ultrasonic phased array imaging detector normal operation, carry out in real time on-line checkingi automatically, and its failure diagnostic process can not reduce detection efficiency and precision to it.
The switching of high-voltage switch gear chip controls transducer array element, thus realize not in the same time the different array elements of transducer carry out transmitting and reception interface echoed signal, the controlling functions of high-voltage switch gear chip realizes by being configured it.Assuming that the total array number of the transducer of ultrasonic phased array imaging detector is 128, the transducer array number be at every turn excited and autonomous channel number are 16, the transducer array element that high-voltage switch gear chip 0 controls be numbered 0,16,32 ..., 112, the transducer array element that high-voltage switch gear chip 1 controls be numbered 1,17,33 ..., 113,, by that analogy, the transducer array element that high-voltage switch gear chip 15 controls be numbered 15,31,47 ..., 127.In normal operating conditions, the emission control module of ultrasonic phased array imaging detector is by configuration high-voltage switch gear chip, make each high-voltage switch gear chip only open one of them transducer array element passage when transmitting at every turn, this transducer array element is connected with radiating circuit.
That detects initial array element as this is numbered 0, then emission control module controls 16 high-voltage switch gear chips and is communicated with respectively and is numbered 0,1,2, the transducer array element of 15, that detects initial array element is numbered 1 next time, then emission control module controls 16 high-voltage switch gear chips and is communicated with respectively and is numbered 16,1,2 ... the transducer array element of 15, by that analogy.When needing to simulate the incomplete data in individual transducers, the transducer array element corresponding with the high-voltage switch gear chip that this transducer is connected can be turned off.And when each scanning is launched, 1 transducer array element is made mistakes to simulate, only all transducer array elements of wherein 1 high-voltage switch gear chip controls need be turned off; Simulate and when each scanning is launched, 2 transducer array elements are made mistakes, only all transducer array elements of wherein 2 high-voltage switch gear chip controls need be turned off.That detects initial array element as this is numbered 0, the saltus step spacing of the adjacent transducer array element be excited for twice is 1, all transducer array elements that only high-voltage switch gear chip 0 and high-voltage switch gear chip 1 need be controlled turn off, the transducer array element that then can normally be excited when the 1st, 2,3 scanning is launched be numbered 2,3,4,5 ..., 15, the transducer array element that can normally be excited when the 4th scanning is launched be numbered 3,4,5 ..., 15,18, by that analogy, until all transducer array element completes the traversal in the detection number of times of setting.
According to foregoing, by being configured high-voltage switch gear chip, a part of transducer array element of this high-voltage switch gear chip controls is not excited, thus the receiving cable at this transducer array element place cannot obtain Waves Investigation for Interface Echo Signal.Can realize controlling the transducer array element controlling any amount when each scanning is launched by this method to damage, thus fault simulation is carried out to this transducer array element damaged condition, draw the failure tolerant performance that ultrasonic phased array imaging detector is made mistakes when causing performance to reduce in a part of transducer array element.
It should be noted last that, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted.Although with reference to embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, modify to technical scheme of the present invention or equivalent replacement, do not depart from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (7)
1. the method for diagnosing faults for ultrasonic phased array imaging detector, described ultrasonic phased array imaging detector comprises: host computer, high-voltage switch gear chip, emission control module, fault detection module, radiating circuit, receiving circuit and A/D sampling module, it is characterized in that, this method for diagnosing faults comprises:
Host computer described in step 1) arranges detection time, amplitude threshold and detects number of times, and described detection time is the time range that Waves Investigation for Interface Echo Signal may occur, described amplitude threshold comprises to be launched amplitude threshold and receives amplitude threshold;
Step 2) described in emission control module produce emissioning controling signal, the transducer array element of this gating specific quantity of the high-voltage switch gear chip described in control and position is fired simultaneously;
Radiating circuit described in step 3) is connected with transducer array element by high-voltage switch gear chip, and described radiating circuit produces and transmits, and this transmits by step 2) in the transducer array element that is excited complete transmitting;
Receiving circuit described in step 4) is connected with transducer array element by high-voltage switch gear chip, described receiving circuit receive from radiating circuit transmit and from the Waves Investigation for Interface Echo Signal of measured object;
Waves Investigation for Interface Echo Signal is carried out digital quantization by the A/D sampling module described in step 5), and the Waves Investigation for Interface Echo Signal feeding fault detection module after digital quantization is carried out amplitude differentiation;
Fault detection module described in step 6) obtains the current transducer array element positional information be excited, record the current transducer array element be excited transmitting and the maximal value of Waves Investigation for Interface Echo Signal and minimum value within described detection time, and judge the current transmission channel at transducer array element place that is excited and the failure condition of receiving cable by comparison signal peak-to-peak value and amplitude threshold, upgrade the error logging table of corresponding transducer array element, notice host computer reads the error logging table of all transducer array element;
The error logging table of all transducer array elements that step 7) host computer is obtained by fault detection module, the type of automatic fault location and position.
2. the method for diagnosing faults for ultrasonic phased array imaging detector according to claim 1, is characterized in that, described detection time carries out calculating to try to achieve to the sound path of testee and the sampling rate of A/D sampling module according to transducer.
3. the method for diagnosing faults for ultrasonic phased array imaging detector according to claim 1, it is characterized in that, described amplitude threshold is obtained by the empirical data of testee, and the scope of this amplitude threshold is less than the threshold range transmitted normally with Waves Investigation for Interface Echo Signal.
4. the method for diagnosing faults for ultrasonic phased array imaging detector according to claim 1, is characterized in that, in described step 7), the type of localizing faults and the method for position comprise:
The transducer array element controlled when described radiating circuit or receiving circuit is all made mistakes, then the radiating circuit that the transducer array element of makeing mistakes is corresponding or receiving circuit break down;
The transducer array element part controlled when described radiating circuit or receiving circuit is made mistakes, then the radiating circuit that the transducer array element of makeing mistakes is corresponding or receiving circuit job insecurity;
The transducer array element controlled when described high-voltage switch gear chip is all made mistakes, but receiving circuit receives from transmitting of radiating circuit all correct, then high-voltage switch gear chip corresponding to the transducer array element of makeing mistakes breaks down;
The transducer array element part controlled when described high-voltage switch gear chip is made mistakes, but receiving circuit receives from transmitting of radiating circuit all correct, then the transducer array element Wiring faults that the transducer array element of makeing mistakes is damaged or high-voltage switch gear chip is made mistakes to this.
5. the method for diagnosing faults for ultrasonic phased array imaging detector according to claim 1, is characterized in that, described ultrasonic phased array imaging detector also comprises: buffer circuit; Transmitting and receiving circuit is kept apart by described buffer circuit, and carries out amplitude limit to receiving circuit.
6. the method for diagnosing faults for ultrasonic phased array imaging detector according to claim 1, is characterized in that, described transducer array element adopts internal loopback probe.
7. the method for diagnosing faults for ultrasonic phased array imaging detector according to claim 1, is characterized in that, described fault detection module and emission control module installation are in same processor.
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| CN109281653A (en) * | 2017-07-19 | 2019-01-29 | 中国科学院声学研究所 | A kind of borehole wall defect classifying identification method based on cylinder ultrasonic phase array |
| CN109281652A (en) * | 2017-07-19 | 2019-01-29 | 中国科学院声学研究所 | A kind of borehole wall imaging system based on cylinder ultrasonic phase array |
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| CN109281651B (en) * | 2017-07-19 | 2020-06-16 | 中国科学院声学研究所 | Ultrasonic borehole wall imaging method applied to cylindrical surface ultrasonic array |
| CN111693861A (en) * | 2020-06-24 | 2020-09-22 | 中电科仪器仪表有限公司 | Switch matrix channel fault diagnosis method and system |
| CN111693861B (en) * | 2020-06-24 | 2022-08-05 | 中电科思仪科技股份有限公司 | Switch matrix channel fault diagnosis method and system |
| DE102021103058A1 (en) | 2021-02-10 | 2022-08-11 | Valeo Schalter Und Sensoren Gmbh | Identifying a disturbance in received echo signals from a group of sensors |
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