CN110221279B - Automatic detection system and detection method for ultrasonic transducer - Google Patents
Automatic detection system and detection method for ultrasonic transducer Download PDFInfo
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- CN110221279B CN110221279B CN201910545047.9A CN201910545047A CN110221279B CN 110221279 B CN110221279 B CN 110221279B CN 201910545047 A CN201910545047 A CN 201910545047A CN 110221279 B CN110221279 B CN 110221279B
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- 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
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Abstract
The invention discloses an automatic detection system and a detection method for an ultrasonic transducer, which are used for analyzing the characteristics of transmitted waves and echoes of the ultrasonic transducer and comprise the following steps: a wave reflecting device which forms an echo by reflecting the emitted wave; the ultrasonic transducer converts an input transmitting wave electric signal into a transmitting wave to be sent out and converts a received echo into an echo electric signal to be output; the wave transmitting device transmits a transmitting wave electric signal to the ultrasonic transducer and receives an echo electric signal from the ultrasonic transducer; the oscillograph device displays the transmitting wave electric signal and the echo electric signal in the same frame oscillogram by receiving the transmitting wave electric signal and the echo electric signal of the wave transmitting device; the computer reads the oscillogram data from the oscillograph device and performs characteristic analysis on the ultrasonic transducer, so that the detection speed is high, no interference of human factors is caused, the precision is higher, and the detection speed of the ultrasonic transducer is improved.
Description
Technical Field
The invention relates to the technical field of transducer detection equipment, in particular to an automatic detection system and a detection method for an ultrasonic transducer.
Background
The ultrasonic transducer is a device which converts mechanical vibration generated by ultrasonic waves into an electric signal by utilizing the piezoelectric effect of ceramics or generates mechanical vibration under the drive of an electric field so as to emit the ultrasonic waves, and the ultrasonic transducers are used in pairs, one is used for transmitting and the other is used for receiving, so that the characteristics of the transmitting waves and the echoes of the transducers used in pairs are required to be matched in order to ensure the effectiveness of data detection of the ultrasonic transducers.
In the prior art, the detection and judgment of the ultrasonic transducer are both manual operation, the judgment is inaccurate, the efficiency is low, and the detection speed of the ultrasonic transducer is seriously influenced.
Disclosure of Invention
In order to solve the technical problems, the invention provides an automatic detection system and a detection method for an ultrasonic transducer, wherein a wave transmitting device is used for transmitting a transmitting wave signal to the ultrasonic transducer and receiving an echo signal, the transmitting wave signal and the echo signal are processed by a computer, and an average value of an effective calculating part of a transmitting wave and an average value of an effective calculating part of an echo are used as characteristic data of the transducer, so that the detection speed is high, no interference of human factors exists, the precision is higher, and the detection speed of the ultrasonic transducer is improved.
In order to solve the technical problems, the invention adopts the following technical scheme:
an automatic detection system for an ultrasonic transducer for analyzing characteristics of a transmitted wave and an echo of the ultrasonic transducer, comprising:
a wave reflecting device which forms an echo by reflecting the transmitted wave;
the ultrasonic transducer converts an input transmitting wave electric signal into a transmitting wave to be sent out and converts a received echo into an echo electric signal to be output;
the wave transmitting device transmits a transmitting wave electric signal to the ultrasonic transducer and the oscillograph device and receives an echo electric signal from the ultrasonic transducer;
the oscillograph device displays the transmitting wave electric signal and the echo electric signal in the same frame oscillogram by receiving the transmitting wave electric signal and the echo electric signal of the wave transmitting device;
and the computer reads the oscillogram data from the oscillograph device and analyzes the characteristics of the ultrasonic transducer.
Further, the automatic detection system also comprises a database server, and the database server is used for storing the result of the analysis of the characteristics of the ultrasonic transducer by the computer.
A detection method of an automatic detection system of an ultrasonic transducer comprises the following steps:
the method comprises the following steps: the wave transmitting device transmits a transmitting wave electric signal to the ultrasonic transducer, receives an echo electric signal from the ultrasonic transducer, and transmits the transmitting wave electric signal and the echo electric signal to the oscillograph device;
step two: the computer reads the frame images of the transmitted waves and the echoes from the oscillograph device and judges whether the frame images are effective frames or not according to the number of white noise in the frame images;
step three: analyzing a transmitting wave starting point, a transmitting wave ending point, an echo starting point and an echo ending point in a first frame effective frame;
step four: judging a transmitting wave effective calculation part between a transmitting wave starting point and a transmitting wave ending point, and calculating the peak value average value of all forward wave peaks in the transmitting wave effective calculation part;
and step five, judging an echo effective calculation part between the echo starting point and the echo ending point, and calculating the peak value average value of all forward peaks in the echo effective calculation part.
Further, the blank noise is a peak with a peak value smaller than 10mV in the frame image, and if the blank noise is smaller than or equal to 250 in the frame image, the frame image is determined to be an effective frame.
Furthermore, the peak corresponding to the maximum forward peak in the waveform diagram of the effective frame is the starting point of the emission wave, and the peak corresponding to the maximum reverse peak in the waveform diagram of the effective frame is the ending point of the emission wave.
And further taking a first wave crest which is behind the emission wave termination point and has a peak value larger than or equal to half of the maximum forward wave peak value as an echo starting point, and taking 45 th to 55 th wave crests behind the wave starting point as echo termination points.
Further, among all peaks between the start point and the end point of the emission wave, if the difference between the peak value of one forward peak and the peak value of the adjacent reverse peak is less than or equal to 1/10 of the peak value of the forward peak, the reverse peak, and the waveforms between the forward peak and the reverse peak are the emission wave effective calculation portion.
Further, in all peaks between the echo start point and the echo end point, if the difference between the peak value of one forward peak and the peak value of the adjacent reverse peak is less than or equal to 1/10 of the peak value of the forward peak, the reverse peak and the waveforms between the forward peak and the reverse peak are the echo effective calculation part.
Compared with the prior art, the invention has the beneficial technical effects that:
1. the transmitting wave signal and the echo signal are transmitted to the ultrasonic transducer through the wave transmitting device and processed by the computer, the average value of the effective calculating part of the transmitting wave and the average value of the effective calculating part of the echo are used as characteristic data of the transducer, the detection speed is high, no interference of human factors exists, the precision is higher, and the detection speed of the ultrasonic transducer is improved.
2. The computer automatically uploads the detection data of the ultrasonic transducer to the database, so that data tracing is facilitated, and quality control of the ultrasonic transducer is improved.
Drawings
FIG. 1 is a schematic view of the structure of the present invention;
FIG. 2 is a flow chart of the detection method of the present invention.
Detailed Description
A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, an automatic inspection system for an ultrasonic transducer for analyzing characteristics of a transmission wave and an echo of the ultrasonic transducer includes:
a wave reflecting device 20 that forms an echo by emitting a transmission wave;
an ultrasonic transducer 10 for converting an input electrical signal of a transmitting wave into a transmitting wave to be emitted and converting a received echo into an electrical signal of an echo to be output;
a wave transmitting device 30 for transmitting a transmitting wave electric signal to the ultrasonic transducer and the oscillometric device and receiving an echo electric signal from the ultrasonic transducer;
an oscillograph 40 for displaying the transmission electric signal and the echo electric signal in the same frame of oscillogram by receiving the transmission electric signal and the echo electric signal of the wave transmitting device;
and a computer 50 for reading the oscillogram data from the oscillometric device and performing ultrasonic transducer characteristic analysis.
In the embodiment, the wave transmitting device is an integrator, the integrator is used for transmitting a transmitting wave electric signal to the ultrasonic transducer and receiving an echo electric signal, the transmitting wave electric signal and the echo electric signal are displayed by the oscillograph and processed by a computer, and an average value of an effective transmitting wave calculating part and an average value of an effective echo calculating part are used as transducer characteristic data which are used for matching the ultrasonic transducer, so that the detection speed is high, no interference of human factors is caused, the precision is higher, and the detection speed of the ultrasonic transducer is improved.
The automatic detection system further comprises a database server, the database server is used for storing results of the computer after the characteristic analysis of the ultrasonic transducer, the computer automatically uploads detection data of the ultrasonic transducer to the database, data tracing is facilitated, and quality control of the ultrasonic transducer is improved.
As shown in fig. 2, a detection method of an automatic ultrasonic transducer detection system includes the following steps:
step S1: the wave transmitting device transmits a transmitting wave electric signal to the ultrasonic transducer, receives an echo electric signal from the ultrasonic transducer, and transmits the transmitting wave electric signal and the echo electric signal to the oscillograph device; the ultrasonic transducer converts a transmitting wave electric signal transmitted by the wave transmitting device into a transmitting wave, the wave reflecting device reflects the transmitting wave to form an echo, part of the echo is reflected to the ultrasonic transducer, the ultrasonic transducer converts the echo into an echo electric signal and transmits the echo electric signal to the wave transmitting device, and the wave transmitting device transmits the transmitting wave electric signal and the echo electric signal to the oscillograph device;
s2: the computer reads the frame images of the transmitted waves and the echoes from the oscillograph device and judges whether the frame images are effective frames or not according to the number of white noise in the frame images; the oscillograph device reads the transmitting wave electric signals and the echo electric signals sent by the wave transmitting device and generates waveform data, and the waveform data are used for displaying waveforms on one hand and transmitting the waveform data to a computer when communicating with the computer on the other hand; the test of the ultrasonic transducer lasts for a period of time, the waveform data read from the oscillograph device by the computer has a plurality of frame images, and whether the frame images are valid frames needs to be judged;
specifically, the blank noise is a peak value of which the peak value in the frame image is less than 10mV, and if the number of the blank noise in the frame image is less than or equal to 250, the frame image is determined to be an effective frame, because the detection of the ultrasonic transducer needs to last for a period of time, oscillogram data read from the oscilloscope by the computer contains a large number of invalid frames, the invalid frames only contain blank noise, and the transmitting wave waveform, the echo wave waveform and the blank noise waveform of the ultrasonic transducer in the effective frame are mixed together; the peak value of the blank noise is less than 10mV, if the number of the white noise in one frame of image of the oscillogram is less than or equal to 250, the quantity of the white noise waveforms in the frame of image is less, the white noise waveforms contain emission wave waveforms and echo waveforms, and the emission wave waveforms and the echo waveforms are relatively stable, and the frame of oscillogram can be judged as an effective frame;
s3: analyzing a transmitting wave starting point, a transmitting wave ending point, an echo starting point and an echo ending point in a first frame effective frame; the waveform image data contains a plurality of effective frames, and the detection of the characteristics of the ultrasonic transducer only needs to analyze and judge the effective frame of the first frame;
specifically, the integrator sends a transmission wave electric signal to the ultrasonic transducer and receives an echo electric signal from the ultrasonic transducer, and because of the specificity of the ultrasonic transducer, the amplitudes of the waveforms of the start part and the end part of the transmission wave are large, and the judgment of the start point and the end point of the transmission wave in the embodiment is as follows: the wave crest corresponding to the maximum forward peak value in the effective frame oscillogram is the initial point of the transmitted wave, and the wave crest corresponding to the maximum reverse peak value in the effective frame oscillogram is the terminal point of the transmitted wave;
according to the characteristics of the ultrasonic transducer and the loss of the waveform in reflection and transmission, the amplitude of an echo is generally half of the amplitude of a transmitted wave, a first wave crest which is behind the end point of the transmitted wave and has a peak value larger than or equal to half of the maximum forward wave peak value is taken as an echo starting point, and 45 th to 55 th wave crests behind the wave starting point are taken as echo end points;
s4: judging an emission wave effective calculation part between an emission wave starting point and an emission wave ending point, and calculating the peak value average value of all forward wave peaks in the emission wave effective calculation part;
s5, judging an echo effective calculation part between an echo starting point and an echo ending point, and calculating the peak value average value of all forward peaks in the echo effective calculation part;
specifically, in all wave crests between a starting point of the transmitted wave and a terminating point of the transmitted wave, if the difference between the peak value of one forward wave crest and the peak value of the adjacent reverse wave crest is less than or equal to 1/10 of the peak value of the forward wave crest, the reverse wave crest and the wave forms between the forward wave crest and the reverse wave crest are effective transmitted wave calculating parts, in the wave form of the transmitted wave, the foremost one-third part and the rearmost one-tenth part are unstable parts, and after the transmitted wave is processed by adopting the method, the seventeen-third stable part in the middle can be screened and intercepted to be used as an effective transmitted wave calculating part; in all wave crests between the echo starting point and the echo terminating point, if the difference between the peak value of one forward wave crest and the peak value of the adjacent reverse wave crest is less than or equal to 1/10 of the peak value of the forward wave crest, the reverse wave crest and the wave forms between the forward wave crest and the reverse wave crest are echo effective calculation parts, in the wave forms of the echoes, the foremost third part and the rearmost tenth part are unstable parts, after the echoes are processed by adopting the method, seventeen-ten stable parts in the middle can be screened and intercepted to be used as echo effective calculation parts, the wave forms between the wave starting point and the terminating point are unstable, the wave crest value difference is large, if all the wave forms of the transmitted waves and the echoes are calculated, the final result is distorted, the method comprises the steps of judging an effective calculation part of the transmitted wave and an effective calculation part of the echo by calculating the proportion of the difference between the absolute values of the peak value of the forward peak and the peak value of the reverse peak to the peak value of the forward peak, avoiding result distortion, and in order to accelerate the calculation speed, calculating part of the peak values in the effective calculation part of the transmitted wave, specifically, arranging the effective calculation parts of the transmitted wave in a descending order, taking the first fifth wave form data in the effective calculation part of the transmitted wave after sorting as the data which finally participate in calculation, and in order to accelerate the calculation speed, quickly sorting the echo in the above way and intercepting the sorted data, wherein when the first fifth wave form data are intercepted, if the integral number of the peak cannot be obtained, the rounding processing is carried out in a way of rounding off.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
Furthermore, it should be understood that although the specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it will be understood by those skilled in the art that the specification as a whole and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. A method for testing an automatic test system for an ultrasonic transducer for analyzing characteristics of a transmitted wave and an echo of the ultrasonic transducer, the automatic test system comprising:
a wave reflecting device (20) which forms an echo by reflecting the transmitted wave;
an ultrasonic transducer (10) which converts an input transmission wave electric signal into a transmission wave to be sent out and converts a received echo into an echo electric signal to be output;
a wave transmitting device (30) for transmitting a transmitting wave electric signal to the ultrasonic transducer and the oscillometric device and receiving an echo electric signal from the ultrasonic transducer;
an oscillograph device (40) for displaying the transmission electric signal and the echo electric signal in the same frame oscillogram by receiving the transmission electric signal and the echo electric signal of the wave transmitting device;
a computer (50) for reading the oscillogram data from the oscillograph device and analyzing the characteristics of the ultrasonic transducer;
the detection method comprises the following steps:
the method comprises the following steps: the wave transmitting device transmits a transmitting wave electric signal to the ultrasonic transducer, receives an echo electric signal from the ultrasonic transducer, and transmits the transmitting wave electric signal and the echo electric signal to the oscillograph device;
step two: the computer reads the frame images of the transmitted waves and the echoes from the oscillograph device and judges whether the frame images are effective frames or not according to the number of white noise in the frame images;
step three: analyzing a transmitting wave starting point, a transmitting wave ending point, an echo starting point and an echo ending point in a first frame effective frame;
step four: judging a transmitting wave effective calculation part between a transmitting wave starting point and a transmitting wave ending point, and calculating the peak value average value of all forward wave peaks in the transmitting wave effective calculation part;
and step five, judging an echo effective calculation part between the echo starting point and the echo ending point, and calculating the peak value average value of all forward peaks in the echo effective calculation part.
2. The inspection method of an automatic inspection system for ultrasonic transducers according to claim 1, wherein: the automatic detection system also comprises a database server, wherein the database server is used for storing results of the computer after the characteristics of the ultrasonic transducer are analyzed.
3. The inspection method of an automatic inspection system for ultrasonic transducers according to claim 1, wherein: the blank noise is a peak with a wave crest value smaller than 10mV in the frame image, and if the blank noise is smaller than or equal to 250 in the frame image, the frame image is judged to be an effective frame.
4. The inspection method of an automatic inspection system for ultrasonic transducers according to claim 1, wherein: the wave crest corresponding to the maximum forward peak value in the effective frame waveform image is the initial point of the transmitted wave, and the wave crest corresponding to the maximum reverse peak value in the effective frame waveform image is the terminal point of the transmitted wave.
5. The inspection method of the automatic inspection system for ultrasonic transducers according to claim 4, wherein: and taking the first wave crest which is behind the transmitted wave termination point and has the peak value which is more than or equal to half of the maximum forward wave peak value as an echo starting point, and retrieving the 45 th to 55 th wave crests behind the wave starting point as the echo termination point.
6. The inspection method of the automatic inspection system for ultrasonic transducers according to claim 4, wherein: in all peaks between the start point and the end point of the emission wave, if the difference between the peak value of one forward peak and the peak value of the adjacent reverse peak is less than or equal to 1/10 of the peak value of the forward peak, the reverse peak, and the waveforms between the forward peak and the reverse peak are effective calculation parts of the emission wave.
7. The inspection method of an automatic inspection system for ultrasonic transducers according to claim 5, wherein: and in all the wave crests between the echo starting point and the echo ending point, if the difference between the peak value of one forward wave crest and the absolute value of the peak value of the adjacent reverse wave crest is less than or equal to 1/10 of the peak value of the forward wave crest, the reverse wave crest and the wave forms between the forward wave crest and the reverse wave crest are the effective echo calculation parts.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4430883A (en) * | 1981-02-02 | 1984-02-14 | U.S. Philips Corporation | Device for the calibration of an ultrasonic transducer |
| EP0181126A1 (en) * | 1984-11-07 | 1986-05-14 | National Nuclear Corporation Limited | Signal synthesiser |
| US6138495A (en) * | 1997-12-31 | 2000-10-31 | Ultraguide Ltd. | Calibration method and apparatus for calibrating position sensors on scanning transducers |
| CN109154521A (en) * | 2016-04-08 | 2019-01-04 | 流线公司 | Ultrasonic liquid level sensor with reflector |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2574280B1 (en) * | 1984-12-07 | 1988-11-25 | Inst Nat Sante Rech Med | METHOD AND DEVICE FOR DETERMINING CARDIOVASCULAR CHARACTERISTICS BY EXTERNAL ROUTE AND THEIR APPLICATION TO HEART DISEASE |
| FR2614450A1 (en) * | 1987-04-21 | 1988-10-28 | Labo Electronique Physique | METHOD AND APPARATUS FOR EXAMINING MEDIA BY ULTRASONIC ULTRASONOGRAPHY |
| US10585177B2 (en) * | 2017-06-19 | 2020-03-10 | Texas Instruments Incorporated | Tuning for ultrasonic transducer |
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- 2019-06-21 CN CN201910545047.9A patent/CN110221279B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4430883A (en) * | 1981-02-02 | 1984-02-14 | U.S. Philips Corporation | Device for the calibration of an ultrasonic transducer |
| EP0181126A1 (en) * | 1984-11-07 | 1986-05-14 | National Nuclear Corporation Limited | Signal synthesiser |
| US6138495A (en) * | 1997-12-31 | 2000-10-31 | Ultraguide Ltd. | Calibration method and apparatus for calibrating position sensors on scanning transducers |
| CN109154521A (en) * | 2016-04-08 | 2019-01-04 | 流线公司 | Ultrasonic liquid level sensor with reflector |
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