CN101126771A - Intelligent triggering method and system of digital storage oscilloscope - Google Patents
Intelligent triggering method and system of digital storage oscilloscope Download PDFInfo
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Abstract
The invention provides an intelligent triggering method and system of a digital storage oscilloscope, belonging to the field of Digital Storage Oscilloscopes (DSOs). The method comprises the following steps: the method comprises the steps of editing a plurality of trigger templates in a user-defined mode, storing user-defined trigger data in each trigger template, setting trigger sensitivity and trigger conditions for each trigger template, setting logic relations among the trigger templates, comparing measured signal data acquired by a digital storage oscilloscope with the trigger data stored in each trigger template according to the logic relations of the trigger templates and the logic relations among the trigger templates, and generating a trigger enabling signal if the measured signal data and the trigger data are within the trigger sensitivity range and meet the trigger conditions. By adopting the invention, a user can set the trigger template at will, dynamically adjust the trigger sensitivity and trigger all complex waveforms.
Description
Technical field
The invention belongs to digital storage oscilloscope (DSO) field, relate to a kind of Intellective method for triggering and system of digital storage oscilloscope.
Background technology
Digital storage oscilloscope (DSO) has abundant triggering mode, and stronger signal handling capacity can longer-term storage and reappear waveform repeatedly, can observe types of signals, is easy to digital display circuits such as computing machines integrated.In current signal measurement, DSO has obtained using widely.
Triggering plays crucial effect in DSO.So-called triggering technique is, for effectively observation measured signal, by setting some trigger conditions, measured signal is constantly compared with trigger condition, have only when trigger condition is satisfied in measured signal, just start a data acquisition, make the user in screen, observe the waveform that satisfies trigger condition.Triggering technique has been arranged, and DSO energy steady display waveform is caught the user's interest waveform.
Triggering method has a lot, the most frequently used is " edge triggering ", and the variation (being the edge that signal rises or descends) that is about to measured signal is compared with a certain level, when the variation of signal reaches this level with certain mode selected, produce a trigger pip, start once and gather.Other triggering method usually can be in the oscillograph than higher gears, as " pulsewidth triggering ", " video triggering ", " slope triggering ", " state triggering " or the like.But the feature of high speed signal is complicated day by day, in some special application scenarios, the slip-stick artist need catch a certain specific waveform that is mixed in the sophisticated signal, above-mentioned single triggering method can not satisfy the needs of test, and this has higher requirement just for the triggering system design of digital storage oscilloscope.
Summary of the invention
The objective of the invention is provides a kind of Intellective method for triggering and system that can satisfy under any complex conditions for digital storage oscilloscope.
Above-mentioned purpose of the present invention is achieved by the following technical solutions:
A kind of Intellective method for triggering of digital storage oscilloscope, its step comprises:
1) edit one or more self-defined triggering templates, each triggers the self-defining trigger data of storage in the template;
2) for triggering template, each sets trigger sensitivity and trigger condition;
3) logical relation between the above-mentioned triggering template of setting;
4) according to the logical relation between the above-mentioned triggering template, the measured signal data that digital storage oscilloscope is collected compare with the trigger data that each triggers template stores respectively, be in the trigger sensitivity scope as both, and satisfy trigger condition, then produce one and trigger enable signal.
General trigger module is set, triggers by selecting general trigger module or self-defined triggering template.
Described trigger condition be selected from greater than, less than, equal or be not equal to.
Described logical relation be selected from logical and, logical OR, logic XOR or logic with or.
Described triggering template is selected from the edge and triggers template, pulsewidth triggering template, video triggering template, slope triggering template or state triggering template, stores edge trigger data, pulsewidth trigger data, video trigger data, slope trigger data or state triggered certificate respectively.
The trigger data of described self-defined triggering template stores is one section Wave data of being edited arbitrarily by the user.
A kind of intelligent trigger system of digital storage oscilloscope, it is characterized in that: comprise a programmable trigger module, this programmable trigger module links to each other with the sample value memory module with the AD sampling of digital storage oscilloscope, described programmable trigger module, the method that is used for digital storage oscilloscope intelligent trigger as claimed in claim 1 can produce one and trigger enable signal; Described programmable trigger module comprises an absolute value comparer, several triggering template memory blocks, a trigger sensitivity controller and a trigger pip synthesis module, and described triggering template memory block, trigger sensitivity controller and trigger pip synthesis module are connected with the absolute value comparer respectively.
Described programmable trigger module all is integrated among the FPGA.
Further comprise a general trigger module, described general trigger module links to each other with the sample value memory module with the AD sampling of digital storage oscilloscope, this general trigger module, the edge triggering function, video triggering function, the pulsewidth that are used to finish digital storage oscilloscope trigger function and slope triggering function, described general trigger module comprises trigger circuit, two 16bit digital to analog converters, two high-speed comparators and triggering for generating and synthesis module, and described trigger circuit, analog to digital converter, triggering for generating and synthesis module are connected with described high-speed comparator respectively.
And, comprising a MUX, described MUX is connected with the programmable trigger module with general trigger module respectively.
Described AD sampling and sample value memory module comprise a two-forty 8bit analog to digital converter, a two-forty push-up storage, a controlling of sampling module and are aided with the logical controlling circuit, are used for the collection of simulating signal and the storage of significant wave graphic data.
The technology of the present invention advantage is as follows:
The invention provides a kind of Intellective method for triggering of digital storage oscilloscope, data in raw data and the programmable trigger template are compared in certain range of sensitivity one by one, except the triggering function commonly used that can satisfy the conventional digital storage oscilloscope, the user can the arbitrary self-defined triggering template that is provided with, or by man-machine interface at the screen inediting, one Wave data that also can utilize oscillograph to collect, and can the dynamic adjustments trigger sensitivity etc. index, strengthened and triggered dirigibility and the reconfigurability that is provided with, adopted the present invention to trigger all complicated wave forms.
And the intelligent trigger system cost of digital storage oscilloscope of the present invention is cheap, the cost performance height.
Description of drawings
Fig. 1 is the intelligent trigger system chart of digital storage oscilloscope of the present invention;
Fig. 2 is the programmable trigger module diagram;
Fig. 3 is the Intellective method for triggering process flow diagram of digital storage oscilloscope of the present invention.
Embodiment
With reference to figure 1, the intelligent trigger system of digital storage oscilloscope of the present invention comprises: modules such as AD sampling and sample value memory module, general trigger module, programmable trigger module, MUX, triggering hold-off control module, acquisition control module and central processing module, wherein
1) AD sampling and sample value memory module are responsible for finishing the collection of simulating signal and the memory function of significant wave graphic data mainly by two-forty 8bit analog to digital converter (ADC), two-forty push-up storage (FIFO), controlling of sampling module and be aided with the logical controlling circuit and form.
2) function of general trigger module realization is that the major part of finishing the conventional digital storage oscilloscope triggers function, i.e. edge triggering, video triggering, pulsewidth triggering, slope triggering etc.It comprises trigger circuit, 2 16bit digital to analog converters (DA), 2 high-speed comparators, triggering for generating and synthesis modules.Trigger circuit are realized shaping and the level translation to input simulation trigger pip; Two analog to digital converters are respectively the triggering comparative level that high-speed comparator provides the user to be provided with arbitrarily, and the output after relatively of trigger pip and comparer is sent in triggering for generating and the synthesis module; Triggering for generating and synthesis module calculate according to user-selected triggering method and differentiate, and send the trigger pip that meets the demands at last.
3) the programmable trigger module as shown in Figure 2, it comprise a 8bit high-speed figure absolute value comparer, can regulate triggering template memory block (SRAM), trigger sensitivity controller and the trigger pip synthesis module of storage depth by the user.Suppose that original sampling data is X, the data that trigger the template memory block are Vn, and trigger sensitivity is s, and trigger condition is for equaling, and then the mathematic(al) representation of absolute value comparer is: | X-Vn|＜s.
4) MUX is responsible for finishing the selection of general trigger pip and programmable touch signalling;
5) triggering the hold-off control module is that oscillograph can not trigger in a period of time of taking place after correct the triggering.When the triggering source was complicated wave form, this module played a role, and consequently, only could trigger at suitable trigger point oscillograph.
6) central processing module mainly is made up of the high performance dsp processor of a slice.It is responsible for data acquisition, triggers the editor who controls, triggers template, the work such as setting of other trigger parameter.
Programmable trigger module of the present invention is integrated in a high performance programmable logic device (PLD) (FPGA).
Enforcement of the present invention can be divided into analog to digital conversion and sample value storage and trigger.
Analog to digital conversion can be selected according to the sampling rate that will reach and the resolution of designed digital storage oscilloscope, and general selected resolution is 8bit.The sample value storage can also need to select according to the requirement of digital storage oscillographs storage depth index, at present FPGA inside integrated memory span reached the Mbit magnitude, can satisfy the application of general occasion, because of triggering function, major part all in FPGA, realizes again, so recommend to select for use high performance FPGA.
Trigger module is divided into general trigger module and programmable trigger module.
General trigger module comprises trigger circuit, high-speed comparator, triggering for generating and synthesis module, and trigger circuit are mainly finished the selection in triggering source, the shaping of trigger pip, the functions such as separation of video trigger pip, and it is to be built by some separating components; High-speed comparator is selected the hypervelocity ECL comparer AD96687 of ADI company for use, and it has two comparers, just satisfies requirement of the present invention; Triggering for generating and synthesis module are totally digital circuits, can realize in FPGA.
Before discuss, the enforcement of programmable trigger module is completely integrated among the FPGA.It comprises that the high-speed figure absolute value comparer of 1 8bit, storage depth can be made up of triggering template memory block (SRAM), trigger sensitivity controller and trigger pip synthesis module four parts that the user regulates.At first the user sets the big or small n that triggers the template memory block, then the user in the template stores district that sets, edit trigger mode and set relative trigger sensitivity s and trigger condition (greater than, less than, equal and be not equal to), the triggering template that sets can be single triggering template, also can be that combination triggers template.The logical relation that combination triggers template can be selected " logical and ", " logical OR ", " logic XOR ", " logic with or " etc.Start immediately after setting finishes and gather, the raw data that collects is delivered to high-speed figure absolute value comparer and is compared with the data that trigger the template memory block, if satisfy trigger condition, produce one and trigger enable signal, this signal is delivered in the trigger pip synthesis module again, carries out the synthetic of trigger pulse in conjunction with the trigger condition that the user sets.
Because the present invention needs the user to edit the triggering template, so complicated man-machine interface interface need be provided, add digital storage oscilloscope to the real time of data acquisition requirement, the performance of central processing unit has just determined the performance of total system, and therefore high speed, high performance flush bonding processor are selected in suggestion for use.
With reference to figure 3, the principle of work of programmable trigger module is to be set by the user the big or small n that triggers the template memory block earlier, then the user in the template stores district that sets, edit trigger mode and set relative trigger sensitivity s and trigger condition (greater than, less than, equal and be not equal to), start immediately after setting finishes and gather, the raw data that collects is delivered to high-speed figure absolute value comparer, according to the logical relation that triggers between the template, compare with each data that trigger the template memory block, when this section raw data is consistent fully with trigger condition, just produce one and trigger enable signal, this signal is delivered in the trigger pip synthesis module again, carries out the synthetic of trigger pulse in conjunction with the trigger condition that the user sets.
Be embodiment one with single triggering template below, the workflow of programmable trigger module of the present invention is described.
At first, edit or call one section by the user and trigger template data, and trigger sensitivity is set, and triggering the template logical relation and be set to single mode, trigger condition is set to equal, system is delivered to the programmable trigger module with above information, begin immediately to carry out signals collecting, in the time of acquired signal, the signal of having gathered begins constantly to compare with the data that trigger template, if the signal of gathering and the data of setting satisfy impose a condition, then produce trigger pip one time; Otherwise, then suppress the generation of trigger pip.Can realize the triggering under any single condition mode like this.
Triggering template with combination below is embodiment two, and the workflow of programmable trigger module is described.
At first, edit or call the n section by the user and trigger template data, trigger template at each trigger sensitivity is set, set trigger condition for equaling, as the logical relation that triggers between the template is set to " logical OR ", system can be delivered to above information n able to programme trigger module district, begin to carry out signals collecting immediately, acquired signal constantly compares with n the data that trigger template region, satisfy trigger condition if the signal of gathering and any one trigger template data, then produce trigger pip one time; Otherwise, then suppress the generation of trigger pip.
Because triggering template of the present invention is based on the combination and the self-defined triggering template of multiple triggering template, therefore, the present invention can derive more, more complicated, more intelligent triggering method.
Claims (10)
1. the Intellective method for triggering of a digital storage oscilloscope, its step comprises:
1) edit one or more self-defined triggering templates, each triggers the self-defining trigger data of storage in the template;
2) for triggering template, each sets trigger sensitivity and trigger condition;
3) logical relation between the above-mentioned triggering template of setting;
4) according to the logical relation between the above-mentioned triggering template, the measured signal data that digital storage oscilloscope is collected compare with the trigger data that each triggers template stores respectively, be in the trigger sensitivity scope as both, and satisfy trigger condition, then produce one and trigger enable signal.
2. Intellective method for triggering as claimed in claim 1 is characterized in that: general trigger module is set, triggers by selecting general trigger module or self-defined triggering template.
3. the Intellective method for triggering of digital storage oscilloscope as claimed in claim 1 is characterized in that: described trigger condition be selected from greater than, less than, equal or be not equal to.
4. as the Intellective method for triggering of claim 1 or 3 described digital storage oscilloscopes, it is characterized in that: described logical relation be selected from logical and, logical OR, logic XOR or logic with or.
5. the Intellective method for triggering of digital storage oscilloscope as claimed in claim 1 or 2, it is characterized in that: described triggering template is selected from the edge and triggers template, pulsewidth triggering template, video triggering template, slope triggering template or state triggering template, stores edge trigger data, pulsewidth trigger data, video trigger data, slope trigger data or state triggered certificate respectively.
6. the Intellective method for triggering of digital storage oscilloscope as claimed in claim 1 is characterized in that: the trigger data of described self-defined triggering template stores be one section by user's Wave data of editor arbitrarily.
7. the intelligent trigger system of a digital storage oscilloscope, it is characterized in that: comprise a programmable trigger module, this programmable trigger module links to each other with the sample value memory module with the AD sampling of digital storage oscilloscope, and described programmable trigger module is used to produce one and triggers enable signal; Described programmable trigger module comprises an absolute value comparer, one or more self-defined triggering templates, a trigger sensitivity controller and a trigger pip synthesis module, and described triggering template memory block, trigger sensitivity controller and trigger pip synthesis module are connected with the absolute value comparer respectively.
8. the intelligent trigger system of digital storage oscilloscope as claimed in claim 7, it is characterized in that: described programmable trigger module is integrated among the FPGA.
9. the intelligent trigger system of digital storage oscilloscope as claimed in claim 7, it is characterized in that: also comprise a general trigger module, described general trigger module links to each other with the sample value memory module with the AD sampling of digital storage oscilloscope, this general trigger module, be used to finish the edge triggering function of digital storage oscilloscope, video triggers function, pulsewidth triggers function and slope triggers function, described general trigger module comprises trigger circuit, two 16bit digital to analog converters, two high-speed comparators and triggering for generating and synthesis module, described trigger circuit, analog to digital converter, triggering for generating is connected with described high-speed comparator respectively with synthesis module.
10. the intelligent trigger system of digital storage oscilloscope as claimed in claim 9, it is characterized in that: also comprise a MUX, described MUX is connected with the programmable trigger module with general trigger module respectively.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101261300B (en) * | 2008-04-18 | 2010-06-23 | 电子科技大学 | Method for measuring digital storage oscillographs storage depth |
| CN102147426A (en) * | 2010-11-18 | 2011-08-10 | 电子科技大学 | A Broadband Trigger Circuit for Digital Oscilloscope |
| CN102298083A (en) * | 2011-07-18 | 2011-12-28 | 叶克江 | Lightning-stroke special digital storage oscilloscope (DSO) and measuring method thereof |
| CN102384995A (en) * | 2010-09-06 | 2012-03-21 | 河南友利华系统工程有限公司 | Template trigger digital oscilloscope |
| CN102384994A (en) * | 2010-09-06 | 2012-03-21 | 河南友利华系统工程有限公司 | Multi-channel composite trigger digital oscilloscope |
| CN103558434A (en) * | 2013-11-04 | 2014-02-05 | 南京国睿安泰信科技股份有限公司 | Quick-positioning digital oscilloscope trigger point system |
| CN103713172A (en) * | 2012-10-08 | 2014-04-09 | 北京普源精电科技有限公司 | Oscilloscope having improved video triggering function |
| CN103808999A (en) * | 2012-11-13 | 2014-05-21 | 北京普源精电科技有限公司 | Oscilloscope with template testing function |
| CN105403747A (en) * | 2015-11-04 | 2016-03-16 | 中国电子科技集团公司第四十一研究所 | Multi-template synchronous test method and oscilloscope |
| CN106053908A (en) * | 2016-07-06 | 2016-10-26 | 电子科技大学 | Analog-to-digital signal conversion device of digital oscilloscope |
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| CN101261300B (en) * | 2008-04-18 | 2010-06-23 | 电子科技大学 | Method for measuring digital storage oscillographs storage depth |
| CN102384995A (en) * | 2010-09-06 | 2012-03-21 | 河南友利华系统工程有限公司 | Template trigger digital oscilloscope |
| CN102384994A (en) * | 2010-09-06 | 2012-03-21 | 河南友利华系统工程有限公司 | Multi-channel composite trigger digital oscilloscope |
| CN102147426A (en) * | 2010-11-18 | 2011-08-10 | 电子科技大学 | A Broadband Trigger Circuit for Digital Oscilloscope |
| CN102147426B (en) * | 2010-11-18 | 2013-01-16 | 电子科技大学 | Broadband trigger circuit of digital oscilloscope |
| CN102298083A (en) * | 2011-07-18 | 2011-12-28 | 叶克江 | Lightning-stroke special digital storage oscilloscope (DSO) and measuring method thereof |
| CN103713172B (en) * | 2012-10-08 | 2017-08-25 | 北京普源精电科技有限公司 | It is a kind of that there is the oscillograph for improving video triggering function |
| CN103713172A (en) * | 2012-10-08 | 2014-04-09 | 北京普源精电科技有限公司 | Oscilloscope having improved video triggering function |
| CN103808999A (en) * | 2012-11-13 | 2014-05-21 | 北京普源精电科技有限公司 | Oscilloscope with template testing function |
| CN103558434A (en) * | 2013-11-04 | 2014-02-05 | 南京国睿安泰信科技股份有限公司 | Quick-positioning digital oscilloscope trigger point system |
| CN103558434B (en) * | 2013-11-04 | 2015-11-18 | 南京国睿安泰信科技股份有限公司 | A kind of quick position digital oscilloscope trigger point system |
| CN105403747A (en) * | 2015-11-04 | 2016-03-16 | 中国电子科技集团公司第四十一研究所 | Multi-template synchronous test method and oscilloscope |
| CN106053908A (en) * | 2016-07-06 | 2016-10-26 | 电子科技大学 | Analog-to-digital signal conversion device of digital oscilloscope |
| CN107219387A (en) * | 2017-06-14 | 2017-09-29 | 电子科技大学 | A kind of real-time Automatic adjustment method of hold-off time |
| CN107219387B (en) * | 2017-06-14 | 2019-05-28 | 电子科技大学 | A kind of real-time Automatic adjustment method of hold-off time |
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