CN103675380A - An oscilloscope with a periodic trigger function - Google Patents
An oscilloscope with a periodic trigger function Download PDFInfo
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- CN103675380A CN103675380A CN201210362469.0A CN201210362469A CN103675380A CN 103675380 A CN103675380 A CN 103675380A CN 201210362469 A CN201210362469 A CN 201210362469A CN 103675380 A CN103675380 A CN 103675380A
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Abstract
The invention provides an oscilloscope with a periodic trigger function. The oscilloscope comprises a data sampling unit, a digital comparing unit, a sampling storage unit, and a trigger control unit. The data sampling unit is used for digitally sampling a tested signal according to a sampling clock in order to obtain sampled data. The digital comparing unit is used for comparing the level of the sampled data in order to generate a comparison signal. The sampling storage unit is used for storing the sampled data according to a trigger signal in order to generate waveform display data. The trigger control unit is used for obtaining the periodic value of a local signal in the tested signal from the comparison signal with the sampling clock, comparing the periodic value with a preset threshold value range, and generating a trigger signal according to a compared result. The oscilloscope may obtain the periodic value of a local signal in the tested signal from the comparison signal. Since the periodic value is obtained from the digital comparison signal, the oscilloscope achieves periodic trigger with a digital manner.
Description
Technical field
The present invention relates to thermometrically technical field, particularly relate to a kind of oscillograph with cycle Trigger Function.
Background technology
Oscillograph is a kind of purposes electronic measuring instrument very widely, and it can convert the visible waveform image of human eye to electric signal invisible to the human eye, is convenient to the change procedure that people study various electric signal.Traditional analog oscilloscope adopts mimic channel (oscillatron), its electron gun is to screen electron emission, and ejected electron line focus forms electron beam, and gets on the screen that inside surface scribbles fluorescent material, the point that electron beam hits like this will send light, thereby depicts squiggle.Digital storage oscilloscope (Digital Storage oscilloscopes, DSO), being called for short digital oscilloscope, is by analog to digital converter, measured signal is converted to numerical information and stores, and utilizes the data reconstruction waveform signal of storage and show on oscillographic screen.
Triggering is one of oscillographic Core Feature, and so-called triggering, refers to according to demand certain trigger condition is set.When the waveform in measured signal meets this trigger condition, oscillograph is caught this waveform and corresponding part thereof immediately, and is presented on screen.There is digital triggering in current digital oscilloscope, that is, the processing of trigger pip and the expansion of triggering mode can be completed by numerical portion.
For example, Chinese patent CN 200710089788.8 " digital trigger circuit ", discloses a kind of digital trigger 100, and this digital trigger 100 can be used for digital oscilloscope.With reference to Fig. 1,101 pairs of the data sampling unit of digital trigger 100 measured signal a carries out data sampling, obtains digitized sampled data b; Numeral comparing unit 102 compares sampled data b and comparative level, obtains comparison signal c; The triggering type that trigger control unit 103 arranges according to user is carried out logical process to comparison signal c, produces trigger pip d when recognizing trigger event; Further, the samples storage unit of digital oscilloscope can be stored sampled data b according to trigger pip d, produces waveform and shows data, for waveform display unit, carries out waveform demonstration.
General, trigger control unit 103 can be used for realizing the logical process of multiple triggering type, and triggering type can be that edging trigger, pulsewidth trigger, slope triggers etc.If edging trigger, rising edge and/or the negative edge at comparison signal produces a trigger pip; If pulsewidth triggers, when the positive pulsewidth of comparison signal or negative pulsewidth are within the scope of default pulsewidth, produce a trigger pip; If slope triggers, when meeting Preset Time scope, produces positive slope time of comparison signal or negative slope time a trigger pip.Existing triggering type has multiple, repeats no more herein, still, in existing triggering mode, all, less than according to the cycle of measured signal, realizes the technology of triggering.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of oscillograph with cycle Trigger Function, can, according to the cycle of measured signal, realize triggering.
In order to address the above problem, the invention discloses a kind of oscillograph with cycle Trigger Function, comprising:
Data sampling unit, for measured signal being carried out to digital sample according to a sampling clock, obtains sampled data;
Numeral comparing unit, relatively processes for described sampled data is carried out to level, produces comparison signal;
Trigger control unit, for according to described comparison signal, produces trigger pip;
Samples storage unit, for described sampled data being stored according to described trigger pip, produces the waveform showing for waveform and shows data;
Described trigger control unit, for utilizing described sampling clock, obtains the periodic quantity of the local signal in described measured signal by described comparison signal; And obtained periodic quantity and a predetermined threshold value scope are compared, according to comparative result, produce described trigger pip.
The present invention can be obtained by described comparison signal the periodic quantity of the local signal in described measured signal, and then compare with predetermined threshold value scope, produce described trigger pip, also be, when this periodic quantity meets certain condition, trigger performance period, because periodic quantity is obtained from digitized comparison signal, therefore, the present invention has utilized digital mode, has realized cycle triggering.
As one, illustrate, in the present invention, described trigger control unit, for according to described sampling clock, is obtained the very first time interval between adjacent two rising edges in described comparison signal, the period 1 value of the local signal using it in obtained measured signal; And obtained period 1 value and described predetermined threshold value scope are compared, according to comparative result, produce described trigger pip.
As one, illustrate, in the present invention, described trigger control unit, for according to described sampling clock, is obtained the very first time interval between adjacent two rising edges in described comparison signal, the period 1 value of the local signal using it in obtained measured signal; According to described sampling clock, obtain second time interval between adjacent two negative edges in described comparison signal, the second week time value of the local signal using it in obtained measured signal; And obtained period 1 value and second week time value are compared with described predetermined threshold value scope respectively, according to comparative result, produce described trigger pip.
In the present invention, can only utilize the very first time interval between adjacent two rising edges in comparison signal, the periodic quantity using it as measured signal triggers performance period; Also can utilize second time interval between adjacent two negative edges in comparison signal, the periodic quantity using it as measured signal triggers performance period; Can also, using equal periodic quantity of the local signal in table measured signal a of very first time interval and second time interval, utilize trigger above-mentioned two performance periods in the time interval.The judgment mode of cycle triggering has multiple, can arrange according to user's different demands.
As an example, in originally illustrating, described trigger control unit comprises:
Rising edge triggering for generating unit, for obtaining the very first time interval between adjacent two rising edges of described comparison signal according to described sampling clock, the period 1 value of the local signal using it in obtained measured signal; And described period 1 value and predetermined threshold value scope are compared, when the described period 1, value was in described predetermined threshold value scope, produce first start pulse signal;
Negative edge triggering for generating unit, for obtaining second time interval between adjacent two negative edges of described comparison signal, the second week time value of the local signal using it in obtained measured signal according to described sampling clock; And described second week time value and predetermined threshold value scope are compared, at described second week time value, during in described predetermined threshold value scope, produce second start pulse signal;
The first trigger pip generation unit, for selecting described the first start pulse signal and described the second start pulse signal one, exports as trigger pip.
As another example, in originally illustrating, described trigger control unit comprises:
Rising edge triggering for generating unit, for obtaining the very first time interval between adjacent two rising edges of described comparison signal according to described sampling clock, the period 1 value of the local signal using it in obtained measured signal; And described period 1 value and predetermined threshold value scope are compared, when the described period 1, value was in described predetermined threshold value scope, produce first start pulse signal;
Negative edge triggering for generating unit, for obtaining second time interval between adjacent two negative edges of described comparison signal, the second week time value of the local signal using it in obtained measured signal according to described sampling clock; And described second week time value and predetermined threshold value scope are compared, at described second week time value, during in described predetermined threshold value scope, produce second start pulse signal;
The second trigger pip generation unit, for described the first start pulse signal and described the second start pulse signal are carried out to logical OR processing, the result that logical OR is processed is exported as trigger pip.
As an embodiment, in this example, described negative edge triggering for generating unit carries out anti-phase processing to described comparison signal, obtains an anti-phase comparison signal; And obtain the time interval between adjacent two rising edges in described anti-phase comparison signal according to described sampling clock, obtain second time interval between adjacent two negative edges in described comparison signal.
As an embodiment, in this example, described rising edge triggering for generating unit comprises:
As another embodiment, in this example, described period 1 count sub-element comprises:
First number totalizer, for when described the first pulse signal is low level, the data variation number of times of described sampling clock is added up, when described the first pulse signal is high level by low transition, accumulation result is exported as the first count value, afterwards accumulation result zero clearing is resetted;
Very first time acquisition module, for the cycle according to sampling clock, is converted to described very first time interval by described the first count value, using it as described period 1 value output.
As an embodiment, in this example, described negative edge triggering for generating unit comprises:
Anti-phase processing subelement, for described comparison signal is carried out to anti-phase processing, obtains described anti-phase comparison signal;
Process subelement second round, for the rising edge at described anti-phase comparison signal, produce a positive pulse that pulsewidth is the sampling clock cycle, obtain second pulse signal that comprises at least two positive pulses;
Second round count sub-element, the time interval for calculating adjacent two positive pulses of described the second pulse signal according to described sampling clock, obtain described second time interval, it is exported as described second week time value;
Second round is subelement relatively, for described second week time value and predetermined threshold value scope are compared, when described second week time value is during in predetermined threshold value scope, in described adjacent two positive pulses, the rising edge of a rear positive pulse, produces described the second start pulse signal.
As another embodiment, in this example, described second round, count sub-element comprised:
Second number totalizer, for when described the second pulse signal is low level, the data variation number of times of described sampling clock is added up, when described the second pulse signal is high level by low transition, accumulation result is exported as the second count value, afterwards accumulation result zero clearing is resetted;
The second time-obtaining module, for the cycle according to sampling clock, is converted to described second time interval by described the second count value, and it is exported as described second week time value.
Illustrate as one, in the present invention, described oscillograph also comprises:
User's input interface, for arranging cycle comparison pattern and at least one Ct value time;
Described trigger control unit is also for generating described predetermined threshold value scope according to set Ct value time and selected cycle comparison pattern.
As another, illustrate, in the present invention, described data sampling unit, for respectively the measured signal of a plurality of passages being carried out to digital sample, obtains corresponding multi-channel sampling data; Described digital comparing unit is relatively processed for respectively described multi-channel sampling data being carried out to level, produce relatively result of corresponding multichannel, and relatively result, select the comparison signal that wherein export as described data comparing unit on a road from described multichannel.
Accompanying drawing explanation
Fig. 1 is the structural representation of the disclosed a kind of digital trigger for digital oscilloscope of prior art;
Fig. 2 is a kind of structural representation with the oscillograph embodiment of cycle Trigger Function of the present invention;
Fig. 3 (a) is the structural representation of an example of trigger control unit;
Fig. 3 (b) is the structural representation of another example of trigger control unit;
Fig. 3 (c) is the structural representation of another example of trigger control unit;
Fig. 4 is an illustrational structural representation of rising edge triggering for generating unit;
Fig. 5 is a kind of signal sequence schematic diagram in oscillograph embodiment of the present invention;
Fig. 6 is an illustrational structural representation of negative edge triggering for generating unit;
Fig. 7 is the sequential schematic diagram of the another kind of signal in oscillograph embodiment of the present invention.
Embodiment
For a kind of oscillograph with cycle Trigger Function of the present invention is described, below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
With reference to Fig. 2, show a kind of structural representation with the oscillograph embodiment of cycle Trigger Function of the present invention, the oscillograph 200 that the present embodiment proposes, comprising:
Data sampling unit 201, it carries out digital sample according to a sampling clock f to measured signal a, obtains sampled data b;
Numeral comparing unit 202, it carries out level to sampled data b relatively processes, and produces comparison signal c;
Samples storage unit 204, it is stored sampled data b according to trigger pip d, produces the waveform showing for waveform and shows data e.
Measured signal a described in the present embodiment is inputed in data sampling unit 201 by the passage of oscillograph 200, data sampling unit 201 comprises an analog to digital converter ADC, the conversion that it carries out analog to digital with certain sampling rate to measured signal a according to sampling clock f, realizes data sampling; Afterwards, the sampled data b obtaining is sent in samples storage unit 204.General, before data sampling unit 201, also have an analog front circuit, for realizing the skew adjustment to measured signal a, control and limit bandwidth etc. a series of function that gains, making measured signal a conditioning is suitable amplitude range, for the reception of data sampling unit 201.The specific implementation of analog front circuit can adopt multiple design proposal, is not repeating herein.
Illustrate as one, in embodiments of the present invention, data sampling unit 201 also can carry out digital sample to the multichannel measured signal a of a plurality of passages respectively, obtains corresponding multi-channel sampling data b; Numeral comparing unit 202 carries out level to described multi-channel sampling data b respectively relatively to be processed, and produces relatively result of corresponding multichannel, and relatively result, selects the comparison signal c that wherein export as data comparing unit 201 on a road from described multichannel.That is to say, for the oscillograph 200 with multiplexer channel, data sampling unit 201 can comprise a plurality of ADC, respectively the measured signal of different passages is sampled; Accordingly, numeral comparing unit 202 can comprise relatively subelement of a plurality of numerals, by multi-channel sampling data, produce corresponding multichannel comparative result respectively, numeral comparing unit 202 can also comprise a channel to channel adapter, the data source triggering for selection cycle, be trigger port, selection will Yi corresponding to trigger port road relatively result as a comparison signal c input in trigger control unit 203.
Illustrate as one, in embodiments of the present invention, digital comparing unit 202 can consist of viscous comparer, and viscous comparer can be relatively precision of 8bit, and user can arrange comparative level and viscous scope, the impact bringing in order to reduce signal noise.After comparative level and the combination of viscous scope, can obtain two physics comparative levels, be called the gentle lower level that powers on.If the sampled data b(8bit of viscous comparer input) be greater than level, viscous comparer output logic " 1 " (1bit); If the sampled data b of input is less than lower level, viscous comparer output logic " 0 " (1bit), can be found out, comparison signal c is the low and high level signal consisting of data " 1 " and data " 0 ".In conjunction with Fig. 5, after can seeing that sine-shaped measured signal a relatively processes by sampling and level, obtain the comparison signal c with low and high level consisting of data " 1 " and data " 0 ", comparison signal c is by data " 0 " during to data " 1 " saltus step, the rising edge of formation comparison signal c; Comparison signal c during to data " 0 " saltus step, forms the negative edge of comparison signal c by data " 1 ".As Fig. 5, in comparison signal c, x indicates the position of rising edge, and y indicates the position of negative edge.
Measured signal a can be cyclical signal, also can make aperiodicity signal.For cyclical signal, local signal is the signal of the one-period of measured signal a, and the periodic quantity of its each section of local signal is all identical.In conjunction with Fig. 5, measured signal a is a periodic sinusoidal signal, and the local signal of this signal can be that a w1 arrives the signal between some w3, and the periodic quantity of this section of local signal is a w1 to the time between some w3; Local signal in measured signal a can be also that a w2 arrives the signal between some w4, and the periodic quantity of this section of local signal is a w2 to the time between some w4.For aperiodicity signal, the periodic quantity of each section of local signal may be identical, also may be different, because the periodic quantity of local signal in measured signal a is to obtain in comparison signal c, therefore, one section of local signal of corresponding measured signal a between the position of adjacent two rising edges of comparison signal c, or one section of local signal of corresponding measured signal a between the position of adjacent two negative edges of comparison signal c.In conjunction with Fig. 7, measured signal a is an aperiodicity signal, and in comparison signal c, x indicates the position of rising edge, and y indicates the position of negative edge.Corresponding between the position of two rising edges adjacent with comparison signal c, one section of local signal of measured signal a can be that a z1 arrives the signal between some z3, and the periodic quantity of this section of local signal is a z1 to the time between some z3; Another section of local signal of measured signal a can be that a z3 arrives the signal between some z5, and the periodic quantity of this section of local signal is a z3 to the time between some z5.Corresponding between the position of two negative edges adjacent with comparison signal c, one section of local signal of measured signal a can be that a z2 arrives the signal between some z4, and the periodic quantity of this section of local signal is a z2 to the time between some z4; Another section of local signal of measured signal a can be that a z4 arrives the signal between some z6, and the periodic quantity of this section of local signal is a z4 to the time between some z6.
It should be noted that, measured signal a may not be strict level and smooth waveform signal, in Fig. 7, the wave regions that v is indicated, it has certain burr, this section of burr may also have certain periodicity, but the periodic quantity of the local signal of measured signal a does not refer to the cycle of this section of burr, the local signal of measured signal a is relevant with the position, edge of comparison signal c, because the position, edge of comparison signal c is to determine by carrying out the comparative level of level while relatively processing, so the periodic quantity of the local signal comparative level set with user is relevant.In Fig. 5 and Fig. 7, with two comparative levels, the gentle lower level that powers on, for example describes.For the level comparison process with a comparative level, can mutually consult.The level of numeral comparing unit 202 is relatively treated to the content of prior art, repeats no more herein.
With reference to Fig. 2, trigger control unit 203 is obtained the local signal of each section of measured signal a successively, utilizes respectively the periodic quantity of each section of local signal to trigger judgement.In embodiments of the present invention, can be obtained by comparison signal c the periodic quantity of the local signal in measured signal a, and then compare with predetermined threshold value scope, according to comparative result, produce trigger pip d, also, when this periodic quantity meets certain condition, trigger performance period, because periodic quantity is obtained from digitized comparison signal c, therefore, the present invention has utilized digital mode, has realized cycle triggering.
Illustrate as one, in embodiments of the present invention, described oscillograph 200 can also comprise user's input interface, and it arranges cycle comparison pattern and at least one Ct value time, general, and two Ct value times are set at most; Described cycle comparison pattern is: be greater than one-period threshold time, be less than one-period threshold time, be less than one-period threshold time or be greater than another Ct value time or be greater than one-period threshold time and be less than another Ct value time; Trigger control unit 203 generates described predetermined threshold value scope according to set Ct value time and user-selected cycle comparison pattern, can find out, one or two Ct value times that user is set can be the endpoint value of predetermined threshold value scope.Be understandable that, foregoing trigger port, triggering type, comparative level and viscous scope, also arranged by this user's input interface.
As one, illustrate, in embodiments of the present invention, trigger control unit 203 can be obtained the very first time interval between adjacent two rising edges in comparison signal c according to sampling clock f, the period 1 value of the local signal using it in obtained measured signal a; And obtained period 1 value and predetermined threshold value scope are compared, according to comparative result, produce trigger pip d.In originally illustrating, the one-period value of the local signal in the corresponding measured signal a in very first time interval in comparison signal c between adjacent two rising edges, it is period 1 value, only utilize the very first time interval between adjacent two rising edges to trigger judgement, when very first time interval is during in described predetermined threshold value scope, judgement meets cycle trigger condition, produces trigger pip d.
In above-mentioned illustrating, can utilize the very first time interval between adjacent two rising edges in comparison signal c, periodic quantity using it as the local signal of measured signal a triggers performance period, and owing to only utilizing the rising edge of comparison signal c to trigger differentiation, so implementation method is simple.
As another, illustrate, in embodiments of the present invention, trigger control unit 203 can, according to sampling clock f, be obtained second time interval between adjacent two negative edges in comparison signal c, the second week time value of the local signal using it in obtained measured signal a; And obtained second week time value and predetermined threshold value scope are compared, according to comparative result, produce trigger pip d.In originally illustrating, second time interval in comparison signal c between adjacent two negative edges has represented the one-period value of the local signal in measured signal a, it is second week time value, only utilize second time interval between adjacent two negative edges to trigger judgement, when second time interval is during in described predetermined threshold value scope, judgement meets cycle trigger condition, produces trigger pip d.
In above-mentioned illustrating, can utilize second time interval between adjacent two negative edges in comparison signal c, periodic quantity using it as the local signal of measured signal a triggers performance period, and owing to only utilizing the negative edge of comparison signal c to trigger differentiation, so implementation method is simple.
As another, illustrate, in embodiments of the present invention, trigger control unit 203, according to sampling clock f, is obtained the very first time interval between adjacent two rising edges in comparison signal c, the period 1 value of the local signal using it in obtained measured signal a; Meanwhile, also according to sampling clock f, obtain second time interval between adjacent two negative edges in comparison signal c, the second week time value of the local signal using it in obtained measured signal a; And obtained period 1 value and second week time value are compared with predetermined threshold value scope respectively, according to comparative result, produce described trigger pip d.In originally illustrating, very first time interval and second time interval all can represent the periodic quantity of the local signal in measured signal a, utilize above-mentioned two time intervals to trigger judgement.
In above-mentioned illustrating, can be using equal periodic quantity of the local signal in table measured signal a of very first time interval and second time interval, both can utilize very first time interval to trigger performance period, and can utilize again trigger for the second performance period in the time interval, triggering mode is versatile and flexible.
As an example, in above-mentioned illustrating, as shown in Fig. 3 (a), trigger control unit 203 can comprise:
Rising edge triggering for generating unit 301, it obtains the very first time interval between adjacent two rising edges in comparison signal c according to sampling clock f, the period 1 value of the local signal using it in obtained measured signal a; And will be worth the period 1 with predetermined threshold value scope and compare, when the period 1, value was in described predetermined threshold value scope, produce a first start pulse signal i;
Negative edge triggering for generating unit 302, it obtains second time interval between adjacent two negative edges in comparison signal c, the second week time value of the local signal using it in obtained measured signal a according to sampling clock f; And second week time value and predetermined threshold value scope are compared, at second week time value, during in described predetermined threshold value scope, produce a second start pulse signal j;
The first trigger pip generation unit 303, it selects in the first start pulse signal i and the second start pulse signal j, as trigger pip d, exports.
Periodic quantity can be the very first time interval between adjacent two rising edges in comparison signal c, time span as represented in t1 in Fig. 5, also can be in comparison signal c between adjacent two negative edges second time interval, time span as represented in t2 in Fig. 5, therefore realizing the signal period while triggering, need the same trigger mechanism of two covers, a set of according to rising edge computation period value, another set of according to negative edge computation period value.In this example, user can be selected according to the very first time interval between adjacent two rising edges, still according to second time interval between adjacent two negative edges, be triggered judgement by user's input interface, the first trigger pip generation unit 303 is equivalent to a selector switch, when user selects to trigger judgement according to the very first time interval between adjacent two rising edges, the first trigger pip generation unit 303 selects the first start pulse signal i as trigger pip d; When user selects to trigger judgement according to second time interval between adjacent two negative edges, the first trigger pip generation unit 303 selects the second start pulse signal j as trigger pip d.
As another example, in above-mentioned illustrating, as shown in Figure 3 (b), trigger control unit 203 can comprise:
Rising edge triggering for generating unit 301, it obtains the very first time interval between adjacent two rising edges in comparison signal c according to sampling clock f, the period 1 value of the local signal using it in obtained measured signal a; And will be worth the period 1 with predetermined threshold value scope and compare, when the period 1, value was in described predetermined threshold value scope, produce a first start pulse signal i;
Negative edge triggering for generating unit 302, it obtains second time interval between adjacent two negative edges in comparison signal c, the second week time value of the local signal using it in obtained measured signal a according to sampling clock f; And second week time value and predetermined threshold value scope are compared, at second week time value, during in described predetermined threshold value scope, produce a second start pulse signal j;
The second trigger pip generation unit 304, it carries out logical OR processing to the first start pulse signal i and the second start pulse signal j, and the result that logical OR is processed is exported as trigger pip d.
In conjunction with Fig. 5, in this example, the first start pulse signal i and the second start pulse signal j are carried out to logical OR processing, the result s that logical OR is processed is in time sequencing, both comprised the first start pulse signal i, the signal that comprises again the second start pulse signal j, the result s that logical OR is processed is as trigger pip d, can guarantee so comparison signal c to carry out complete judgement, both can trigger judgement according to the very first time interval between adjacent two rising edges, generation comprises the trigger pip of the first start pulse signal i, simultaneously, can trigger judgement according to second time interval between adjacent two negative edges again, generation comprises the trigger pip of the second start pulse signal j.
As another example, in above-mentioned illustrating, as shown in Figure 3 (c), trigger control unit 203 can comprise: rising edge triggering for generating unit 301, negative edge triggering for generating unit 302, the first trigger pip generation unit 303 and the second trigger pip generation unit 304.In this example, trigger control unit 203 both can have been utilized the first trigger pip generation unit 303, selected in the first start pulse signal i and the second start pulse signal j, as trigger pip d, exported; Can utilize again the second trigger pip generation unit 304, the first start pulse signal i and the second start pulse signal j are carried out to logical OR processing, the result that logical OR is processed is exported as trigger pip d.Be understandable that, the first trigger pip generation unit 303 and the second trigger pip generation unit 304 can only have one to carry out work at synchronization.
As a modification, in above-mentioned three examples, negative edge triggering for generating unit 302 can first carry out anti-phase processing to comparison signal c, obtains an anti-phase comparison signal g; According to sampling clock f, obtain the time interval between adjacent two rising edges in anti-phase comparison signal g more afterwards, obtain second time interval between adjacent two negative edges in comparison signal c.That is to say, second time interval according to comparison signal c between adjacent two negative edges is when trigger, can carry out anti-phase to comparison signal, now, similar with the principle of rising edge triggering for generating unit 301, by calculating time interval between adjacent two rising edges, obtain the periodic quantity of the local signal in measured signal a.
As another modification, in above-mentioned three examples, as shown in Figure 4, rising edge triggering for generating unit 301 comprises:
Below in conjunction with Fig. 5, the course of work of rising edge triggering for generating unit 301 is specifically described.As can be seen from Figure 5, it is positive pulse p1 and the positive pulse p2 in sampling clock cycle in each rising edge position generation pulsewidth of comparison signal c that the period 1 is processed subelement 401, obtains the first pulse signal k that comprises positive pulse p1 and positive pulse p2.It should be noted that, comparison signal c may have a plurality of rising edges, and corresponding, the first pulse signal k has a plurality of positive pulses, only usings two positive pulses herein as signal.Period 1 count sub-element 402 is calculated the time interval between adjacent two positive pulse p1 and p2 in the first pulse signal k according to sampling clock f.
As an example, in above-mentioned modification, as shown in Figure 4, period 1 count sub-element 402 comprises:
First number totalizer 404, the enable signal u that its perseverance producing according to trigger control unit 203 is high level, when the first pulse signal k is low level, data variation number of times to sampling clock f adds up, when the first pulse signal k is high level by low transition, accumulation result is exported as the first count value m, afterwards accumulation result zero clearing is resetted;
Very first time acquisition module 405, it is converted to very first time interval according to the cycle of sampling clock f by the first count value m, the value t1 output using it as the period 1.
In conjunction with Fig. 5, first number totalizer 404, when the first pulse signal k is low level, adds up to the data variation number of times of sampling clock f, by the end of the high level of the first pulse signal k, the data variation number of times of sampling clock f is 9, and exporting the first count value m is 9.Suppose in this example, the cycle of sampling clock f is 1ns, and very first time acquisition module 405 is multiplied by the first count value m by the cycle of sampling clock f, can obtain for the first low level duration of pulse signal k, is 9ns.As can be seen from Figure 5, according to the rising edge of positive pulse p1 and positive pulse p2, accurately calculate the time interval of the two, it should be the pulsewidth that the first low level duration of pulse signal k added a positive pulse, therefore, the obtaining very first time interval and should be of conversion: the pulsewidth of cycle+positive pulse p of the first count value m* sampling clock f is 10ns.Using this value as period 1 value t1, compare with predetermined threshold value scope, in this example, period 1 value t1 is in predetermined threshold value scope, and the rising edge of the rear positive pulse p2 in adjacent two positive pulse p1 and p2 produces the first start pulse signal i.In originally illustrating, sampling clock f is synchronizeed with comparison signal c, the first pulse signal k, the first start pulse signal i.
It should be noted that, period 1 count sub-element 402 can, only by the low level duration in the first pulse signal k, as the time interval of adjacent two positive pulses, also be period 1 value t1; Period 1 comparison subelement 403 first deducts predetermined threshold value scope the cycle of a sampling clock f, then be worth to t1 the period 1 and deduct the predetermined threshold value scope in sampling clock f cycle and compare, can produce the first start pulse signal i according to comparative result equally.
As another modification, in above-mentioned three examples, as shown in Figure 6, negative edge triggering for generating unit 302 comprises:
Anti-phase processing subelement 604, it carries out anti-phase processing to comparison signal c, obtains anti-phase comparison signal g;
Process subelement 601 second round, it is the positive pulse in sampling clock cycle that its rising edge at anti-phase comparison signal g produces a pulsewidth, obtains a second pulse signal r who comprises at least two positive pulses;
Second round, count sub-element 602, and it calculates the time interval of adjacent two positive pulses in the second pulse signal r according to sampling clock f, obtained for second time interval, using it as second week time value t2, exported;
Second round is subelement 603 relatively, it compares second week time value t2 and predetermined threshold value scope, when second week time value t2 is during in predetermined threshold value scope, the rising edge of a rear positive pulse in described adjacent two positive pulses, produces the second start pulse signal j.
Below in conjunction with Fig. 5, the course of work of negative edge triggering for generating unit 302 is specifically described.As can be seen from Figure 5, the low and high level of the anti-phase comparison signal g that anti-phase processing subelement 604 obtains is contrary with comparison signal c, processing subelement 601 second round is positive pulse q1 and the positive pulse q2 in sampling clock cycle in each rising edge position generation pulsewidth of anti-phase comparison signal g, obtains the second pulse signal r that comprises positive pulse q1 and positive pulse q2.Equally, the second pulse signal r can have a plurality of positive pulses, only usings two positive pulses herein as signal.Second round, count sub-element 602 was calculated the time interval between adjacent two positive pulse q1 and q2 in the second pulse signal r according to sampling clock f.
As an example, in above-mentioned modification, as shown in Figure 6, second round, count sub-element 602 comprised:
Second number totalizer 605, it is according to an enable signal u that perseverance is high level, when the second pulse signal r is low level, data variation number of times to sampling clock f adds up, when the second pulse signal r is high level by low transition, accumulation result is exported as the second count value n, afterwards accumulation result zero clearing is resetted;
The second time-obtaining module 606, it was converted to for second time interval according to the cycle of sampling clock f by the second count value n, using it as second week time value t2, exported.
In conjunction with Fig. 5, the time interval between positive pulse q1 and q2, and the computing method in the time interval between positive pulse p1 and p2 are similar, repeat no more herein, and can be with reference to the computing method in the time interval of adjacent two positive pulses in the first pulse signal k.Afterwards, the time interval between positive pulse q1 and q2 is as second week time value t2, compare with predetermined threshold value scope, in this example, second week time value t2 is in predetermined threshold value scope, and the rising edge of the rear positive pulse q2 in adjacent two positive pulse q1 and q2 produces the second start pulse signal j.It should be noted that, similar with period 1 count sub-element 402, second round, count sub-element 602 can, only by the low level duration in the second pulse signal r, as the time interval of adjacent two positive pulses, also be second week time value t2; Second round, relatively subelement 603 first deducted predetermined threshold value scope the cycle of a sampling clock f, then by second week time value t2 with deduct the predetermined threshold value scope in sampling clock f cycle and compare, can produce the second start pulse signal j according to comparative result equally.In originally illustrating, sampling clock f is synchronizeed with comparison signal c, anti-phase comparison signal g, the second pulse signal r, the first start pulse signal j.
Be understandable that, the computing method in the time interval in the time interval in anti-phase comparison signal g between adjacent two rising edges and comparison signal c between adjacent two rising edges are similar.The course of work of the course of work of rising edge triggering for generating unit 301 and negative edge triggering for generating unit 302 can cross-reference, its unit, module to build principle similar, different, the calculation procedure of second week time value t2 than the calculation procedure of period 1 value t1 many an anti-phase process.
In conjunction with Fig. 3 (a), Fig. 3 (c) and Fig. 5, the cycle edge that cycle triggering is set as user is: rising edge is to rising edge, be about to the very first time interval between adjacent two rising edges in comparison signal c, while triggering as the periodic quantity of the local signal in the measured signal a cycle of carrying out, the first trigger pip generation unit 303 can be selected the first start pulse signal i that rising edge triggering for generating unit 301 is produced, and using it as trigger pip d, exports.
The cycle edge that cycle triggering is set as user is: negative edge is to negative edge, be about to second time interval between adjacent two negative edges in comparison signal c, while triggering as the periodic quantity of the local signal in the measured signal a cycle of carrying out, the first trigger pip generation unit 303 can be selected the second start pulse signal j that negative edge triggering for generating unit 302 is produced, and using it as trigger pip d, exports.
In conjunction with Fig. 3 (b), Fig. 3 (c) and Fig. 5, the cycle edge that cycle triggering is set as user is: rising edge is to rising edge, or negative edge is to negative edge,, both can, by the very first time interval between adjacent two rising edges in comparison signal c, as the periodic quantity of the local signal in measured signal a, carry out cycle triggering; Again can be by second time interval between adjacent two negative edges in comparison signal c, periodic quantity as the local signal in measured signal a is carried out cycle triggering, now, the first start pulse signal i that the first start pulse signal i that the second trigger pip generation unit 304 produces rising edge triggering for generating unit 301 and negative edge triggering for generating unit 302 produce carries out logical OR processing, obtain the result s that logical OR is processed, using it as trigger pip d, export.
It should be noted that, trigger control unit 203 produces after trigger pip, and samples storage unit 204 is stored sampled data b according to trigger pip d, produces the waveform showing for waveform and shows data e.Be not, trigger pip d of every generation, samples storage unit 204 is just stored sampled data b in response to this trigger pip d.This be because, first samples storage unit 204 carries out pre-samples storage to sampled data, pre-samples storage during this period of time in, samples storage unit 204 is not respond trigger pip d's.After pre-samples storage finishes, trigger control unit 203 can produce one and trigger enable signal, and after this, samples storage unit 204, just in response to trigger pip d, starts to carry out delay sampling storage to sampled data b.And subsequent delay samples storage during this period of time in, if there is trigger pip d to produce, 204 pairs of samples storage unit this trigger pip d does not respond yet.In addition, delay sampling has been stored, and between pre-samples storage next time, has a Dead Time, and in Dead Time, 204 pairs of samples storage unit trigger pip d does not respond yet.
In conjunction with Fig. 5, the result s that logical OR is processed is in time sequencing, the first start pulse signal i, but also the signal that comprises the second start pulse signal j had not only been comprised, if trigger control unit 203 produces one and triggers after enable signal, samples storage unit 204 receives the trigger pip d that comprises the first start pulse signal i, in response to trigger pip d, sampled data b is carried out to delay sampling storage, be equivalent to carry out cycle triggering according to the very first time interval between adjacent two rising edges; If subsequent delay samples storage during this period of time in or in Dead Time after delay sampling has been stored, samples storage unit 204 receives the trigger pip d that comprises the second start pulse signal j producing subsequently, not in response to trigger pip d; If completed at upper once pre-samples storage, trigger control unit 203 produces one and trigger after enable signals, samples storage unit 204 receives the trigger pip d that comprises the second start pulse signal j, in response to trigger pip d, sampled data b is carried out to delay sampling storage, be equivalent to realize cycle triggering according to second time interval between adjacent two negative edges.
The process that samples storage unit 204 carries out samples storage according to trigger pip d belongs to the content of prior art, and the present embodiment is only made schematic illustration, repeats no more herein.
It should be noted that, while obtaining the periodic quantity of the local signal in measured signal a by comparison signal c, according to the train of impulses being formed by low and high level in comparison signal c, to measure between two, according to time sequencing, obtain successively at least one in very first time interval between adjacent two rising edges, second time interval between adjacent two negative edges, and compare according to the time of obtaining successively and described predetermined threshold value scope, according to comparative result, produce and trigger new d.
Be understandable that, the oscillograph 200 described in the embodiment of the present invention can also trigger for frequency.Illustrate as one, in embodiments of the present invention, described user's input interface is also for arranging frequency comparison pattern and at least one frequency threshold; Described frequency comparison pattern is: be greater than a frequency threshold, be less than a frequency threshold, be less than a frequency threshold or be greater than another frequency threshold or be greater than a frequency threshold and be less than another frequency threshold; Trigger control unit 203 generates described predetermined threshold value scope according to set frequency threshold and user-selected frequency comparison pattern, can find out that one or two frequency thresholds that user is set are the endpoint value of predetermined threshold value scope.Trigger control unit 203, after comparison signal c obtains the periodic quantity of the local signal in measured signal a, is converted to frequency values by this periodic quantity; And described frequency values and described predetermined threshold value scope are compared, according to comparative result, produce trigger pip d, thereby realize frequency, trigger.The principle that frequency triggers and cycle have triggered a process by periodic quantity acquisition frequency values similar, just many, repeat no more herein.
Above to a kind of oscillograph with cycle Trigger Function provided by the present invention, be described in detail, applied specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; , for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention meanwhile.
Claims (12)
1. an oscillograph with cycle Trigger Function, comprising:
Data sampling unit, for measured signal being carried out to digital sample according to a sampling clock, obtains sampled data;
Numeral comparing unit, relatively processes for described sampled data is carried out to level, produces comparison signal;
Trigger control unit, for according to described comparison signal, produces trigger pip;
Samples storage unit, for described sampled data being stored according to described trigger pip, produces the waveform showing for waveform and shows data;
It is characterized in that,
Described trigger control unit, for utilizing described sampling clock, obtains the periodic quantity of the local signal in described measured signal by described comparison signal; And obtained periodic quantity and a predetermined threshold value scope are compared, according to comparative result, produce described trigger pip.
2. oscillograph as claimed in claim 1, is characterized in that,
Described trigger control unit, for according to described sampling clock, is obtained the very first time interval between adjacent two rising edges in described comparison signal, the period 1 value of the local signal using it in obtained measured signal; And obtained period 1 value and described predetermined threshold value scope are compared, according to comparative result, produce described trigger pip.
3. oscillograph as claimed in claim 1, is characterized in that,
Described trigger control unit, for according to described sampling clock, is obtained the very first time interval between adjacent two rising edges in described comparison signal, the period 1 value of the local signal using it in obtained measured signal; According to described sampling clock, obtain second time interval between adjacent two negative edges in described comparison signal, the second week time value of the local signal using it in obtained measured signal;
And obtained period 1 value and second week time value are compared with described predetermined threshold value scope respectively, according to comparative result, produce described trigger pip.
4. oscillograph as claimed in claim 3, is characterized in that, described trigger control unit comprises:
Rising edge triggering for generating unit, for obtaining the very first time interval between adjacent two rising edges of described comparison signal according to described sampling clock, the period 1 value of the local signal using it in obtained measured signal; And described period 1 value and predetermined threshold value scope are compared, when the described period 1, value was in described predetermined threshold value scope, produce first start pulse signal;
Negative edge triggering for generating unit, for obtaining second time interval between adjacent two negative edges of described comparison signal, the second week time value of the local signal using it in obtained measured signal according to described sampling clock; And described second week time value and predetermined threshold value scope are compared, at described second week time value, during in described predetermined threshold value scope, produce second start pulse signal;
The first trigger pip generation unit, for selecting described the first start pulse signal and described the second start pulse signal one, exports as trigger pip.
5. oscillograph as claimed in claim 3, is characterized in that, described trigger control unit comprises:
Rising edge triggering for generating unit, for obtaining the very first time interval between adjacent two rising edges of described comparison signal according to described sampling clock, the period 1 value of the local signal using it in obtained measured signal; And described period 1 value and predetermined threshold value scope are compared, when the described period 1, value was in described predetermined threshold value scope, produce first start pulse signal;
Negative edge triggering for generating unit, for obtaining second time interval between adjacent two negative edges of described comparison signal, the second week time value of the local signal using it in obtained measured signal according to described sampling clock; And described second week time value and predetermined threshold value scope are compared, at described second week time value, during in described predetermined threshold value scope, produce second start pulse signal;
The second trigger pip generation unit, for described the first start pulse signal and described the second start pulse signal are carried out to logical OR processing, the result that logical OR is processed is exported as trigger pip.
6. the oscillograph as described in claim 4 or 5, is characterized in that,
Described negative edge triggering for generating unit carries out anti-phase processing to described comparison signal, obtains an anti-phase comparison signal; And obtain the time interval between adjacent two rising edges in described anti-phase comparison signal according to described sampling clock, obtain second time interval between adjacent two negative edges in described comparison signal.
7. the oscillograph as described in claim 4 or 5, is characterized in that, described rising edge triggering for generating unit comprises:
Period 1 is processed subelement, for the rising edge at described comparison signal, produces a positive pulse that pulsewidth is the sampling clock cycle, obtains first pulse signal that comprises at least two positive pulses;
Period 1 count sub-element, in the time interval for calculating adjacent two positive pulses of described the first pulse signal according to described sampling clock, obtains described very first time interval, using it as described period 1 value output;
Period 1 is subelement relatively, for described period 1 value and predetermined threshold value scope are compared, when the described period 1, value was in predetermined threshold value scope, in described adjacent two positive pulses, the rising edge of a rear positive pulse, produces described the first start pulse signal.
8. oscillograph as claimed in claim 7, is characterized in that, described period 1 count sub-element comprises:
First number totalizer, for when described the first pulse signal is low level, the data variation number of times of described sampling clock is added up, when described the first pulse signal is high level by low transition, accumulation result is exported as the first count value, afterwards accumulation result zero clearing is resetted;
Very first time acquisition module, for the cycle according to sampling clock, is converted to described very first time interval by described the first count value, using it as described period 1 value output.
9. oscillograph as claimed in claim 6, is characterized in that, described negative edge triggering for generating unit comprises:
Anti-phase processing subelement, for described comparison signal is carried out to anti-phase processing, obtains described anti-phase comparison signal;
Process subelement second round, for the rising edge at described anti-phase comparison signal, produce a positive pulse that pulsewidth is the sampling clock cycle, obtain second pulse signal that comprises at least two positive pulses;
Second round count sub-element, the time interval for calculating adjacent two positive pulses of described the second pulse signal according to described sampling clock, obtain described second time interval, it is exported as described second week time value;
Second round is subelement relatively, for described second week time value and predetermined threshold value scope are compared, when described second week time value is during in predetermined threshold value scope, in described adjacent two positive pulses, the rising edge of a rear positive pulse, produces described the second start pulse signal.
10. oscillograph as claimed in claim 9, is characterized in that, described second round, count sub-element comprised:
Second number totalizer, for when described the second pulse signal is low level, the data variation number of times of described sampling clock is added up, when described the second pulse signal is high level by low transition, accumulation result is exported as the second count value, afterwards accumulation result zero clearing is resetted;
The second time-obtaining module, for the cycle according to sampling clock, is converted to described second time interval by described the second count value, and it is exported as described second week time value.
11. oscillographs as claimed in claim 1, is characterized in that, also comprise:
User's input interface, for arranging cycle comparison pattern and at least one Ct value time;
Described trigger control unit is also for generating described predetermined threshold value scope according to set Ct value time and selected cycle comparison pattern.
12. oscillographs as claimed in claim 1, is characterized in that,
Described data sampling unit, for respectively the measured signal of a plurality of passages being carried out to digital sample, obtains corresponding multi-channel sampling data;
Described digital comparing unit is relatively processed for respectively described multi-channel sampling data being carried out to level, produce relatively result of corresponding multichannel, and relatively result, select the comparison signal that wherein export as described data comparing unit on a road from described multichannel.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104820120A (en) * | 2015-04-20 | 2015-08-05 | 深圳市鼎阳科技有限公司 | Method and device for improving signal triggering precision |
| CN108646072A (en) * | 2018-05-16 | 2018-10-12 | 电子科技大学 | A kind of triggering generation device based on Hamming distance |
| CN108982941A (en) * | 2018-06-20 | 2018-12-11 | 深圳市鼎阳科技有限公司 | A kind of method for real-time measurement and device, oscillograph, storage medium of period frequency |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002116225A (en) * | 2000-10-04 | 2002-04-19 | Yokogawa Electric Corp | Serial pattern trigger circuit |
| US20060074607A1 (en) * | 2004-09-28 | 2006-04-06 | Weller Dennis J | Digital trigger filter for a real time digital oscilloscope |
| CN101086510A (en) * | 2006-03-24 | 2007-12-12 | 特克特朗尼克公司 | Digital trigger circuit |
| CN201508381U (en) * | 2009-07-21 | 2010-06-16 | 北京普源精电科技有限公司 | Digital oscilloscope with video triggering function |
| CN102466748A (en) * | 2010-11-03 | 2012-05-23 | 北京普源精电科技有限公司 | Digital oscilloscope with equivalent sampling function, and equivalent sampling method for digital oscilloscope |
-
2012
- 2012-09-25 CN CN201210362469.0A patent/CN103675380B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002116225A (en) * | 2000-10-04 | 2002-04-19 | Yokogawa Electric Corp | Serial pattern trigger circuit |
| US20060074607A1 (en) * | 2004-09-28 | 2006-04-06 | Weller Dennis J | Digital trigger filter for a real time digital oscilloscope |
| CN101086510A (en) * | 2006-03-24 | 2007-12-12 | 特克特朗尼克公司 | Digital trigger circuit |
| CN201508381U (en) * | 2009-07-21 | 2010-06-16 | 北京普源精电科技有限公司 | Digital oscilloscope with video triggering function |
| CN102466748A (en) * | 2010-11-03 | 2012-05-23 | 北京普源精电科技有限公司 | Digital oscilloscope with equivalent sampling function, and equivalent sampling method for digital oscilloscope |
Non-Patent Citations (1)
| Title |
|---|
| 一种数字存储示波器智能触发技术研究;曾浩等;《仪表技术与传感器》;20101231(第6期);第66页 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104820120A (en) * | 2015-04-20 | 2015-08-05 | 深圳市鼎阳科技有限公司 | Method and device for improving signal triggering precision |
| CN104820120B (en) * | 2015-04-20 | 2018-01-30 | 深圳市鼎阳科技有限公司 | A kind of method and apparatus for improving signal triggering precision |
| CN108646072A (en) * | 2018-05-16 | 2018-10-12 | 电子科技大学 | A kind of triggering generation device based on Hamming distance |
| CN108646072B (en) * | 2018-05-16 | 2019-12-27 | 电子科技大学 | Trigger generating device based on Hamming distance |
| CN108982941A (en) * | 2018-06-20 | 2018-12-11 | 深圳市鼎阳科技有限公司 | A kind of method for real-time measurement and device, oscillograph, storage medium of period frequency |
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