CN101666818A - Method for detecting signal by oscilloscope - Google Patents
Method for detecting signal by oscilloscope Download PDFInfo
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- CN101666818A CN101666818A CN200910108936A CN200910108936A CN101666818A CN 101666818 A CN101666818 A CN 101666818A CN 200910108936 A CN200910108936 A CN 200910108936A CN 200910108936 A CN200910108936 A CN 200910108936A CN 101666818 A CN101666818 A CN 101666818A
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Abstract
The invention discloses a method for detecting signals by an oscilloscope, comprising the following steps: setting the coupling way of a channel; setting a voltage tap position and a time-base tap position; setting a first waveform display area and a second waveform display area; judging whether the maximum or the minimum of the waveform exceeds the set first waveform display area; and if the waveform of the measured signal exceeds the first waveform display area, adjusting the voltage tap position to lead the maximum or the minimum of the signal in the set second waveform display area and determining the type of the signal according to the maximum or the minimum. By the above method for detecting signals by the oscilloscope, whether an obvious signal exits can be automatically detected bythe oscilloscope, the type of the signal can be determined according to the maximum and the minimum by the oscilloscope, thereby improving the efficiency of detecting signal.
Description
[technical field]
The relevant a kind of digital oscilloscope of the present invention, particularly a kind of method of digital oscilloscope detection signal.
[background technology]
Oscillograph is the time dependent waveform display instrument of shows signal amplitude of image, is a kind of comprehensive characteristics of signals tester, is the basic kind of electronic measuring instrument.Along with industrial expansion,, digital oscilloscope is had higher requirement for detection signal more efficiently.
[summary of the invention]
In view of this, be necessary to provide a kind of method that can the efficient detection signal.
A kind of method of detecting signal by oscilloscope, this method comprises: the coupling manner of setting passage; Setting voltage, time base gear; Set first, second waveform viewing area; Judge the maximal value of waveform or the first waveform viewing area whether minimum value exceeds setting; If the waveform of measured signal has exceeded the first waveform viewing area, then adjust the voltage gear, make signal maximum or minimum value be in the second waveform viewing area of setting, and determine the type of signal according to described maximal value and minimum value.
Preferably, also comprise the step that the coupling manner of passage is made as the direct current coupling.
Preferably, the voltage gear is set to minimum gear in the step of described setting voltage, time base gear, with the time base gear be arranged on value between 1ms～10ms.
Preferably, when setting the waveform viewing area, for single channel signal, the zone in the waveform viewing area of screen between the regulation ordinate 50～150 is the first waveform viewing area, and the zone between the ordinate 5～50 and 150～195 is the second waveform viewing area.
Preferably, when setting the waveform viewing area, for double-channel signal, the zone in the waveform viewing area between the regulation ordinate 25～75 and 125～175 is the first waveform viewing area, ordinate 5～25,75～95, and the zone between 105～125,150～195 is the second waveform viewing area.
Preferably, if the maximal value of the waveform of measured signal or minimum value have exceeded the first waveform viewing area, then illustrating in this passage has clear signal.
Preferably, in the step of described adjustment voltage gear, at first the voltage gear is set to maximum gear, whether maximal value or the minimum value of judging waveform then are in the second waveform viewing area, if do not have, then continue to reduce the voltage gear and judge whether the maximal value of waveform or minimum value are in the second waveform viewing area, if do not have, repeat above-mentioned steps again, till whether maximal value or minimum value were in the second waveform viewing area, can determine the voltage gear this moment.
Preferably, describedly determine that according to described maximal value and minimum value the step of the type of signal is: the difference of calculating maximal value and minimum value; Difference is compared with specified accuracy, if the difference of maximal value and minimum value during less than specified accuracy, thinks that then this signal has only direct current signal; If the difference of maximal value and minimum value during greater than specified accuracy, thinks that then the existing direct current signal of this signal has AC signal again.
Preferably, also comprise the hardware frequency measurement, when determining the base gear step.
Preferably, if hardware frequency measurement success and has AC signal in the passage, then get this AC signal the time base as the time base gear, and trigger this passage; If a plurality of passages all have AC signal, then get in a plurality of signals when bigger base value as the time base gear, and trigger passage with this AC signal of base value when big.
Preferably, if hardware frequency measurement success and all is direct current signal in the passage, then with the time base gear be made as value between 10ms～250 μ s, and trigger passage with big magnitude of voltage.
Preferably, if hardware frequency measurement failure, and AC signal would be arranged in the passage, then trigger the passage of this AC signal, and should be made as 500 μ s by time base gear, whether the periodicity that calculates waveform in the waveform viewing area then is less than 3, if less than, base when then strengthening, till the periodicity that calculates is greater than 3, Ruo Shiji 3 not enough of periodicities when 10ms, then no longer calculate, think that this gear is terminal hour base, if periodicity is greater than 6, till the periodicity that calculates is less than 6; If a plurality of passages all have AC signal and hardware frequency measurement all to fail, then trigger the bigger passage of peak-to-peak value, and should be made as 500 μ s by time base gear, whether the periodicity that calculates waveform in the waveform viewing area then is less than 3, if less than, base when then strengthening, till the periodicity that calculates is greater than 3, Ruo Shiji 3 not enough of periodicities when 10ms, then no longer calculate, think that this gear is terminal hour base, as if periodicity greater than 6, then present time base gear is reduced a gear, till the periodicity that calculates is less than 6.
Preferably, if hardware frequency measurement failure and all is direct current signal in the passage, then with the time base gear be decided to be value between 10ms～250 μ s, trigger passage with big magnitude of voltage.
By the method for above-mentioned detecting signal by oscilloscope, oscillograph not only can automatically detect whether have or not tangible signal, also can determine the type of signal according to described maximal value and minimum value, has improved the efficient of detection signal.
[description of drawings]
Figure 1 shows that the process flow diagram of method one embodiment of detecting signal by oscilloscope of the present invention.
Fig. 2 is the synoptic diagram of method shown in Figure 1 about the waveform viewing area of single channel signal.
Fig. 3 is the synoptic diagram of method shown in Figure 1 about the waveform viewing area of double-channel signal.
[embodiment]
As shown in Figure 1, the method for the detecting signal by oscilloscope of one embodiment of the invention includes no signal and detects S21 and alternating current-direct current input S25 two big steps, wherein:
Have or not input S21 may further comprise the steps:
S201: the coupling manner of setting passage;
In this step S201, the coupling manner of setting passage is the direct current coupling, can guarantee can detect the AC and DC signal simultaneously in follow-up step with the direct current coupling manner; Also available interchange coupling in other example, but only can detect AC signal with exchanging coupling manner.
S202: setting voltage, time base gear;
In this step S202, the voltage gear is set to minimum gear, such as 2mv; Time base gear is arranged on big gear, such as the value that is in 1ms～10ms interval.The purpose that above-mentioned gear is set is to make signal waveform as far as possible intactly be presented at the waveform viewing area of oscillograph screen;
S203: set first, second waveform viewing area;
S203 in this step, as shown in Figure 2, for single channel signal, the zone in the waveform viewing area of screen between the regulation ordinate 50～150 is the first waveform viewing area 101, and the zone between the ordinate 5～50 and 150～195 is the second waveform viewing area 102; As shown in Figure 3, for double-channel signal, zone in the waveform viewing area between the regulation ordinate 25～75 and 125～175 is the first waveform viewing area 103, ordinate 5～25,75～95, and the zone between 105～125,150～195 is the second waveform viewing area 104.
S204: judge the maximal value of waveform or the first waveform viewing area whether minimum value exceeds setting;
If the waveform of measured signal has exceeded the first waveform viewing area, then illustrating in this passage has clear signal.Such as: for single channel signal, the maximal value of waveform or minimum value have exceeded the first waveform viewing area 101; For double-channel signal, the maximal value of waveform or minimum value have exceeded the first waveform viewing area 103, and then illustrating has clear signal in the respective channel.
So far, have or not the step S21 of input to finish.
Then, can further carry out the alternating current-direct current input, this detection step S25 may further comprise the steps:
S205: adjust the voltage gear, make signal maximum or minimum value be in the second waveform viewing area of setting;
In this step S205, at first the voltage gear is set to maximum gear, whether maximal value or the minimum value of judging waveform then are in the second waveform viewing area 102,104, if do not have, then continue to reduce the voltage gear and judge that whether the maximal value of waveform or minimum value are in the second waveform viewing area 102,104, if do not have, repeat above-mentioned steps again, till whether maximal value or minimum value were in the second waveform viewing area 102,104, can determine the voltage gear this moment.
S206: the difference of calculating maximal value and minimum value;
S207: difference is compared with specified accuracy, judge signal kinds;
In this step S207, specified accuracy is made as the length of 10 pixels, also can specified accuracy be made as greater or less than 10 pixels certainly according to actual conditions, but should be not excessive or too small.
If this difference during less than specified accuracy, thinks that then this signal has only direct current signal, can provide prompting simultaneously; If during greater than specified accuracy, think that then the existing direct current signal of this signal has AC signal again.
S208: hardware frequency measurement, base gear when determining;
In this step S208, the difference as a result of hardware frequency measurement, the quantity difference of signalling channel, the method to set up of time base gear is also different, below illustrates:
1. hardware frequency measurement case of successful
(1) double-channel signal
If twin-channel signal is all AC signal, and all frequency measurement successes, then get in two signals when bigger base value as the time base gear, and trigger this passage; If the wherein signal frequency measurement of passage failure, the signal frequency measurement success of another passage, promptly get the frequency measurement success passage signal the time base value as the time base gear, and trigger this passage;
If twin-channel signal is all direct current signal, gets 10ms～250 μ s as time base gear, and trigger the passage that this has big magnitude of voltage;
If one of them signal of binary channels is an AC signal, another signal is a direct current signal, get AC signal the time base value as the time base gear, and trigger this communication channel.
(2) single channel signal
When the signal of this passage is AC signal, get this AC signal the time base value as time base gear, and trigger this passage;
When the signal of this passage is direct current signal, gets 10ms～250 μ s as time base gear, and trigger this passage.
2. the situation of hardware frequency measurement failure
2.1 double-channel signal
(1) twin-channel signal is all AC signal
If twin-channel signal frequency measurement is all failed, then trigger the bigger passage of peak-to-peak value (VPP), and the time base of this passage is decided to be 500 μ s, base gear when readjusting then, the periodicity that signal waveform is represented in the viewing area meets certain requirements, thereby is convenient to observation.Specific practice is: whether the periodicity by judge calculating waveform in the waveform viewing area less than 3, if less than, base when then strengthening, till the periodicity that calculates is greater than 3, Ruo Shiji 3 not enough of periodicities when 10ms then no longer calculate, and think that this gear is terminal hour base; If periodicity is greater than 6, then the base gear reduces a gear when present, till the periodicity that calculates is less than 6.
(2) twin-channel signal is all direct current signal
Time base gear is decided to be 10ms～250 μ s, triggers passage with big magnitude of voltage.
(3) one passages are AC signal, and another passage is a direct current signal
If have the passage frequency measurement failure of AC signal, then trigger the passage that this has AC signal, the time base with this passage is decided to be 500 μ s then, base gear when readjusting then, the periodicity that signal waveform is represented in the viewing area meets certain requirements, thereby is convenient to observation.Specific practice is: whether the periodicity by judge calculating waveform in the waveform viewing area less than 3, if less than, base when then strengthening, till the periodicity that calculates is greater than 3, Ruo Shiji 3 not enough of periodicities when 10ms then no longer calculate, and think that this gear is terminal hour base; If periodicity is greater than 6, then the base gear reduces a gear when present, till the periodicity that calculates is less than 6.
2.2 single channel
(1) this passage is an AC signal
At first the time base with this passage is decided to be 500 μ s, base gear when readjusting then, and the periodicity that signal waveform is represented in the viewing area meets certain requirements, thereby is convenient to observation.Specific practice is: whether the periodicity by judge calculating waveform in the waveform viewing area less than 3, if less than, base when then strengthening, till the periodicity that calculates is greater than 3, Ruo Shiji 3 not enough of periodicities when 10ms then no longer calculate, and think that this gear is terminal hour base; If periodicity is greater than 6, then the base gear reduces a gear when present, till the periodicity that calculates is less than 6.And trigger this passage.
(2) this passage is a direct current signal
Time base gear is decided to be 10ms～250 μ s, triggers this passage.
Finish.
By the method for above-mentioned detecting signal by oscilloscope, oscillograph not only can automatically detect whether have or not tangible signal, also automatically has or not direct current or AC signal in the detection signal, has improved the efficient of detection signal.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (13)
1, a kind of method of detecting signal by oscilloscope, this method comprises: the coupling manner of setting passage; Setting voltage, time base gear; Set first, second waveform viewing area; Judge the maximal value of waveform or the first waveform viewing area whether minimum value exceeds setting; If the waveform of measured signal has exceeded the first waveform viewing area, then adjust the voltage gear, make signal maximum or minimum value be in the second waveform viewing area of setting, and determine the type of signal according to described maximal value and minimum value.
2, the method for the detecting signal by oscilloscope described in claim 1 is characterized in that: also comprise the step that the coupling manner of passage is made as the direct current coupling.
3, the method for the detecting signal by oscilloscope described in claim 1 is characterized in that: the voltage gear is set to minimum gear in the step of described setting voltage, time base gear, with the time base gear be arranged on value between 1ms～10ms.
4, the method for the detecting signal by oscilloscope described in claim 1, it is characterized in that: when setting the waveform viewing area, for single channel signal, zone in the waveform viewing area of screen between the regulation ordinate 50～150 is the first waveform viewing area, and the zone between the ordinate 5～50 and 150～195 is the second waveform viewing area.
5, the method for the detecting signal by oscilloscope described in claim 1, it is characterized in that: when setting the waveform viewing area, for double-channel signal, zone in the waveform viewing area between the regulation ordinate 25～75 and 125～175 is the first waveform viewing area, ordinate 5～25,75～95, and the zone between 105～125,150～195 is the second waveform viewing area.
6, the method for the detecting signal by oscilloscope described in claim 1 is characterized in that: if the maximal value of the waveform of measured signal or minimum value have exceeded the first waveform viewing area, then illustrating in this passage has clear signal.
7, the method for the detecting signal by oscilloscope described in claim 1, it is characterized in that: in the step of described adjustment voltage gear, at first the voltage gear is set to maximum gear, whether maximal value or the minimum value of judging waveform then are in the second waveform viewing area, if do not have, then continue to reduce the voltage gear and judge whether the maximal value of waveform or minimum value are in the second waveform viewing area, if do not have, repeat above-mentioned steps again, till whether maximal value or minimum value were in the second waveform viewing area, can determine the voltage gear this moment.
8, the method for the detecting signal by oscilloscope described in claim 1 is characterized in that: describedly determine that according to described maximal value and minimum value the step of the type of signal is: the difference of calculating maximal value and minimum value; Difference is compared with specified accuracy, if the difference of maximal value and minimum value during less than specified accuracy, thinks that then this signal has only direct current signal; If the difference of maximal value and minimum value during greater than specified accuracy, thinks that then the existing direct current signal of this signal has AC signal again.
9, as the method for any described detecting signal by oscilloscope among the claim 1-8, it is characterized in that: also comprise the hardware frequency measurement, when determining the base gear step.
10, the method for the detecting signal by oscilloscope described in claim 9 is characterized in that: if hardware frequency measurement success and has AC signal in the passage, then get this AC signal the time base as the time base gear, and trigger this passage; If a plurality of passages all have AC signal, then get in a plurality of signals when bigger base value as the time base gear, and trigger passage with this AC signal of base value when big.
11, the method for the detecting signal by oscilloscope described in claim 9 is characterized in that: if hardware frequency measurement success and all is direct current signal in the passage, then with the time base gear be made as 10ms～250 μ s, and trigger passage with big magnitude of voltage.
12, the method of the detecting signal by oscilloscope described in claim 9, it is characterized in that: if hardware frequency measurement failure, and AC signal is arranged in the passage, then trigger the passage of this AC signal, and should be made as 500 μ s by time base gear, whether the periodicity that calculates waveform in the waveform viewing area then is less than 3, if less than, base when then strengthening is till the periodicity that calculates is greater than 3, Ruo Shiji 3 not enough of periodicities when 10ms, then no longer calculate, think that this gear is terminal hour base, as if periodicity greater than 6, then present time base gear is reduced a gear, till the periodicity that calculates is less than 6; If a plurality of passages all have AC signal and hardware frequency measurement all to fail, then trigger the bigger passage of peak-to-peak value, and should be made as 500 μ s by time base gear, whether the periodicity that calculates waveform in the waveform viewing area then is less than 3, if less than, base when then strengthening, till the periodicity that calculates is greater than 3, Ruo Shiji 3 not enough of periodicities when 10ms, then no longer calculate, think that this gear is terminal hour base, as if periodicity greater than 6, then present time base gear is reduced a gear, till the periodicity that calculates is less than 6.
13, the method for the detecting signal by oscilloscope described in claim 9 is characterized in that: if hardware frequency measurement failure and all is direct current signal in the passage, then with the time base gear be decided to be 10ms～250 μ s, trigger passage with big magnitude of voltage.
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Effective date of registration: 20120803 Address after: 518055, 5 floor, 8 A industrial district, Nanshan District, Guangdong, Shenzhen, China Patentee after: Shenzhen Siglent Technologies Co., Ltd. Address before: 518055, building 8, building 5, Tong Lang Industrial Area, Shenzhen,, Guangdong, Nanshan District Co-patentee before: Shao Haitao Patentee before: Qin Ke Co-patentee before: Zhao Yafeng |
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| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 518000 Guangdong Province, Baoan District, Baoan District, Xin'an Street, Xingdong Community, 68 District, Antongda Industrial Factory Area, 4 factories, 3 floors, 5 office buildings, 1-3 floors Patentee after: Shenzhen dingyang Technology Co., Ltd Address before: 518055, building 8, building 5, Tong Lang Industrial Area, Shenzhen,, Guangdong, Nanshan District Patentee before: SHENZHEN CITY SIGLENT TECHNOLOGIES Co.,Ltd. |