CN102759575B - A kind of channel ultrasonic checkout equipment triggering method based on trigger table - Google Patents
A kind of channel ultrasonic checkout equipment triggering method based on trigger table Download PDFInfo
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Abstract
The invention discloses a kind of channel ultrasonic checkout equipment triggering method based on trigger table, comprise step: with trigger port and trigger instants for coordinate works out trigger table; User selects trigger point in trigger table; Judge that whether the trigger point that user selects effective, if effectively, then by the down sending content of trigger table to shot signal generator; Shot signal generator is according to the content of trigger table, and the information such as trigger pulse width and activation period, produces trigger pip.This triggering method is convenient, flexible, strong adaptability.During Ultrasonic Detection, as long as user is according to detection needs, corresponding trigger point is selected in trigger table, just can control the trigger sequence of each passage of channel ultrasonic checkout equipment, so can not only meet conventional testing requirement, the testing requirement that such as several channel skip triggerings etc. are special can also be met, thus widened the range of application of online ultrasonic detection equipment.
Description
Technical field
The present invention relates to the triggering method of ultrasonic detection equipment, especially relate to a kind of channel ultrasonic checkout equipment triggering method based on trigger table.
Background technology
Ultrasonic Detection is a kind of method of industrial Non-Destructive Testing, and it mainly make use of ultrasound wave propagation characteristic within the workpiece, and its Cleaning Principle is: sound source produces ultrasound wave, allows ultrasound wave enter workpiece in some way; Ultrasound wave is propagated within the workpiece, and interacts with workpiece material and defect wherein, and hyperacoustic direction of propagation or feature are changed; Receive the ultrasound wave after changing by checkout equipment, it is processed and analyzes, according to the characteristic of its feature evaluation surface of the work and inside whether existing defects and defect.
In order to ensure the correctness of data acquisition, necessary stringent synchronization between hyperacoustic generation and the collection of echo data, the use of synchronous trigger pulse is the key of stringent synchronization.In channel ultrasonic checkout equipment, each passage needs a synchronous trigger pulse.Due to the difference of detected object, and the diversity of testing requirement, need a kind of mechanism to ensure that the triggering of each passage can both meet the requirement of characterization processes.
But the triggering method of existing ultrasonic detection equipment is fairly simple, be generally divided into simultaneously and timesharing two kinds, trigger i.e. all passages simultaneously and trigger together, timesharing triggers and triggers successively for passage.These two kinds of triggering modes can only meet conventional testing requirement, have the occasion of particular/special requirement at some, and such as need certain several channel skip to trigger, such triggering mode just can not meet the demands.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of channel ultrasonic checkout equipment triggering method based on trigger table, and it is convenient, flexible, strong adaptability.
For solving the problems of the technologies described above, the channel ultrasonic checkout equipment triggering method based on trigger table of the present invention, comprises the following steps:
1) with trigger port and trigger instants for coordinate works out trigger table, in trigger table, the point of crossing of Two coordinate is defined as trigger point;
2) user is according to the needs of Ultrasonic Detection, selects corresponding trigger point in trigger table;
3) judge that whether the trigger point that user selects is effective, if so, then forward step 4 to); If not, then terminate;
4) by the content of trigger table, at least comprise trigger port corresponding to each effective trigger point number and trigger instants, be handed down to shot signal generator;
5) shot signal generator is according to the content of the trigger table received, and trigger pulse width and activation period, produces trigger pip.
Described trigger port comprises actual sense channel and idle channel; When the trigger port corresponding to a certain trigger point is idle channel, the trigger instants corresponding in this trigger point only carries out the time delay of time, does not trigger any physical channel.
In described trigger table, trigger instants sum is consistent with actual sense channel sum.
Described step 3) in, can judge that whether the trigger point that user selects is effective according to following principle:
Same actual sense channel can only be selected under a trigger instants;
Under same trigger instants, idle channel and actual sense channel can not be simultaneously selected;
The trigger port chosen under same trigger instants, trigger pulse width is consistent with activation period.
Defining trigger instants corresponding to effective trigger point is effective trigger instants, then step 5) in, the trigger sequence of each passage can be determined according to the size of effective trigger instants, and carry out circulation triggering.
Channel ultrasonic checkout equipment triggering method of the present invention, by design trigger table, achieve the object of control channel trigger sequence, enable the needs that user detects according to reality, flexibly, easily combination in any passage trigger, so, be not only the online ultrasonic detection equipment of hyperchannel and provide a kind of more flexible passage triggering method, widen its range of application, also can solve the passage triggering difficult problem that ultrasonic phased array detects.
Accompanying drawing explanation
Fig. 1 is the trigger table schematic diagram of the embodiment of the present invention;
Fig. 2 is the circulation triggering mode schematic diagram of the embodiment of the present invention.
Embodiment
Understand more specifically for having technology contents of the present invention, feature and effect, now in conjunction with illustrated embodiment, details are as follows:
In the embodiment of the present invention, the port number of channel ultrasonic checkout equipment is N (N is natural number, and N >=1), take trigger port as ordinate, trigger instants is horizontal ordinate, designs the trigger table of this N channel ultrasonic detection equipment, and using the human-computer interaction interface of this trigger table as host computer.As shown in Figure 1, this trigger table is the form of a N × (N+1), and ordinate is the passage needing to trigger, and wherein, passage 1 ~ N is actual sense channel, and passage O is idle channel; Horizontal ordinate is the moment that passage triggers, and is respectively 1 ~ N; The point of crossing (i.e. the intersection point of trigger port and trigger instants) of definition ordinate and horizontal ordinate is trigger point, represent that passage corresponding to this point of crossing was triggered in the moment that this point of crossing is corresponding, wherein, ordinate is that the point of crossing of O represents that the moment corresponding in this point of crossing does not trigger any physical channel, only carries out the time delay of time.
When carrying out Ultrasonic Detection, first, user, according to the actual needs detected, selects corresponding trigger point in trigger table.Then, according to following principle, host computer judges that whether the trigger point that user chooses is effective:
1, same actual sense channel can only be selected under a trigger instants;
2, under same trigger instants, idle channel and actual sense channel can not be chosen simultaneously;
3, the trigger port chosen under same trigger instants, trigger pulse width is consistent with activation period.
If the trigger point that user chooses meets above-mentioned requirements, be effective trigger point, the content (comprising the information such as the channel number of needs triggering and the moment of triggering) of this trigger table is just handed down to shot signal generator by host computer.Adopt FPGA (Field-ProgrammableGateArray, field programmable gate array) as shot signal generator in this enforcement.FPGA is according to the trigger table information received, and the information such as trigger pulse width and activation period, produce trigger pip, wherein, the trigger sequence of passage is determined by the size of its trigger instants, as shown in Figure 2, the passage that effective trigger instants is little first triggers, trigger after the passage that effective trigger instants is large, the passage that effective trigger instants is identical then triggers simultaneously, after the passage that in the end effective trigger instants is corresponding triggers, more again trigger passage corresponding to first effective trigger instants, circulate triggering so successively.(in Fig. 2, "○" represents effective trigger instants,
represent invalid trigger instants.)
Claims (6)
1., based on a channel ultrasonic checkout equipment triggering method for trigger table, it is characterized in that, comprise the following steps:
1) with trigger port and trigger instants for coordinate works out trigger table, in trigger table, the point of crossing of Two coordinate is defined as trigger point;
2) user is according to the needs of Ultrasonic Detection, selects corresponding trigger point in trigger table;
3) judge that whether the trigger point that user selects is effective, if so, then forward step 4 to); If not, then terminate;
4) by the content of trigger table, at least comprise trigger port corresponding to each effective trigger point number and trigger instants, be handed down to shot signal generator;
5) shot signal generator is according to the content of the trigger table received, and trigger pulse width and activation period, produces trigger pip.
2. triggering method as claimed in claim 1, is characterized in that: described trigger port comprises actual sense channel and idle channel; When the trigger port that trigger point is corresponding is idle channel, the trigger instants corresponding in this trigger point only carries out the time delay of time, not trigger port.
3. triggering method as claimed in claim 2, is characterized in that: in described trigger table, and trigger instants sum is consistent with actual sense channel sum.
4. triggering method as claimed in claim 2 or claim 3, is characterized in that, step 3) in, judge that whether the trigger point that user selects is effective according to following principle:
Same actual sense channel can only be selected under a trigger instants;
Under same trigger instants, idle channel and actual sense channel can not be simultaneously selected;
The trigger port chosen under same trigger instants, trigger pulse width is consistent with activation period.
5. triggering method according to any one of claims 1 to 3, it is characterized in that: step 5) in, defining trigger instants corresponding to effective trigger point is effective trigger instants, and the trigger sequence of passage is determined by the size of effective trigger instants, and carries out circulation triggering.
6. triggering method as claimed in claim 4, is characterized in that: step 5) in, defining trigger instants corresponding to effective trigger point is effective trigger instants, and the trigger sequence of passage is determined by the size of effective trigger instants, and carries out circulation triggering.
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| CN201110103333.3A CN102759575B (en) | 2011-04-25 | 2011-04-25 | A kind of channel ultrasonic checkout equipment triggering method based on trigger table |
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| CN201110103333.3A CN102759575B (en) | 2011-04-25 | 2011-04-25 | A kind of channel ultrasonic checkout equipment triggering method based on trigger table |
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| CN102759575B true CN102759575B (en) | 2016-01-06 |
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Citations (3)
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| CN1038703A (en) * | 1988-05-20 | 1990-01-10 | 菲利浦光灯制造公司 | Ultrasonic echo registering instrument with controllable phase coherence |
| SU1426227A1 (en) * | 1987-02-20 | 1994-02-28 | Д.С. Шрайбер | Device for ultrasound flaw detection |
| CN101576537A (en) * | 2009-06-16 | 2009-11-11 | 北京理工大学 | Ultrasound phased array exciting bank |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7751989B2 (en) * | 2006-11-30 | 2010-07-06 | Fbs, Inc. | Guided wave pipeline inspection system with enhanced focusing capability |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1426227A1 (en) * | 1987-02-20 | 1994-02-28 | Д.С. Шрайбер | Device for ultrasound flaw detection |
| CN1038703A (en) * | 1988-05-20 | 1990-01-10 | 菲利浦光灯制造公司 | Ultrasonic echo registering instrument with controllable phase coherence |
| CN101576537A (en) * | 2009-06-16 | 2009-11-11 | 北京理工大学 | Ultrasound phased array exciting bank |
Non-Patent Citations (2)
| Title |
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| 基于PC机的机车轮轴超声探伤仪实现;马晨;《现代电子技术》;20101231(第316期);138-141页 * |
| 基于高速采集卡的超声波检测系统;常春霞;《传感器检测及物联网系统》;20101231(第12期);56-58页 * |
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