CN101093232B - Fast detector for surging or sudden drawdown voltages, and method - Google Patents
Fast detector for surging or sudden drawdown voltages, and method Download PDFInfo
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- CN101093232B CN101093232B CN2006100938099A CN200610093809A CN101093232B CN 101093232 B CN101093232 B CN 101093232B CN 2006100938099 A CN2006100938099 A CN 2006100938099A CN 200610093809 A CN200610093809 A CN 200610093809A CN 101093232 B CN101093232 B CN 101093232B
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- 238000000034 method Methods 0.000 title abstract description 8
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 238000012360 testing method Methods 0.000 claims description 46
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- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims 1
- 230000010355 oscillation Effects 0.000 description 6
- 230000009191 jumping Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000003278 mimic effect Effects 0.000 description 2
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Abstract
A method for detecting sudden-up and sudden-down of voltage includes generating reference sine signal with the same phase and fixed amplitude as voltage signal of power supply, rectifying power supply voltage signal and reference sine signal then comparing rectified power supply voltage signal with rectified reference sine signal for obtaining detection result to present whether voltage is sudden-up or sudden-down.
Description
Technical field
The present invention relates to the voltage detecting field, particularly a kind ofly detect that voltage jumps and the device and method of bust.
Background technology
Voltage is jumped and the compensation of bust in key factor be that fast detecting jumps and the bust incident to voltage.Delay detecting incident and delay the compensation incident causing system out of service or bring serious consequence to system.Yet, owing to traditional approach depends on power supply is carried out the root mean square estimation or depends on the signal after the rectification is carried out low-pass filtering, therefore need 2 to 5 oscillation period usually, just can detect voltage and jump and the bust incident.
Summary of the invention
Because above-mentioned reason, the present invention aims to provide and a kind ofly detects quickly and easily that voltage jumps and the method and apparatus of bust.
Voltage of the present invention jumps and the detection method of bust may further comprise the steps:
Produce reference sinusoidal signal with power supply voltage signal homophase fixed amplitude;
Carry out rectification to power supply voltage signal with reference to sinusoidal signal;
Power supply voltage signal after the rectification and the reference sinusoidal signal after the rectification compared obtain representing whether voltage jumps or the testing result of bust.
In described comparison step, the reference sinusoidal signal that the power supply voltage signal after the rectification deducts after the rectification obtains testing result.In this case, when testing result greater than 0 the time, expression voltage jumps; When testing result less than 0 the time, the expression voltage die.In the practice, often set, represent that voltage jumps when testing result during greater than preset positive value; When testing result during less than predetermined negative value, the expression voltage die.
In described comparison step, the power supply voltage signal that the reference sinusoidal signal after the rectification deducts after the rectification obtains testing result.In this case, when testing result less than 0 the time, expression voltage jumps; When testing result greater than 0 the time, the expression voltage die.Perhaps, when testing result during less than predetermined negative value, expression voltage jumps; When testing result during greater than preset positive value, the expression voltage die.
After described comparison step, also comprise the step of testing result being carried out low-pass filtering.In this case, cutoff frequency is the frequency of power supply voltage signal.
Voltage of the present invention jumps and the detector of bust comprises:
With reference to sinusoidal signal generator, be used for the input supply voltage signal and produce reference sinusoidal signal with power supply voltage signal homophase fixed amplitude;
First rectification circuit is used for the input supply voltage signal and power supply voltage signal is carried out rectification;
Second rectification circuit is connected in reference to sinusoidal signal generator, is used for input and with reference to sinusoidal signal the reference sinusoidal signal is carried out rectification;
Comparer is connected in first rectification circuit and second rectification circuit, is used for power supply voltage signal after the rectification and the reference sinusoidal signal after the rectification are compared, and obtains representing whether voltage jumps or the testing result of bust.
The reference sinusoidal signal that the power supply voltage signal of described comparer after the rectification deducts after the rectification obtains testing result.
The power supply voltage signal that described comparer also can deduct from the reference sinusoidal signal after the rectification after the rectification obtains testing result.
Detector of the present invention also comprises: low-pass first order filter, be connected in comparer, and testing result is carried out low-pass filtering.Wherein, the cutoff frequency of low-pass first order filter is the frequency of power supply voltage signal.
Detection scheme of the present invention only needs just to detect jumping and bust of voltage 1/4 oscillation period, thereby can improve response speed significantly.And the present invention can use mimic channel to implement at an easy rate, and needn't digital circuit, thereby realizes that cost of the present invention also is reduced.
Description of drawings
Fig. 1 illustrates that voltage of the present invention jumps and the process flow diagram of bust detection method;
Fig. 2 illustrates that voltage of the present invention jumps and the circuit block diagram of bust detecting device;
Fig. 3 illustrates that voltage of the present invention jumps and the circuit diagram of bust detecting device;
Fig. 4 illustrates the tracking results of this detecting device when power supply has 20% bust;
The tracking results of this detecting device when Fig. 5 illustrates power supply and has 25% to jump.
Embodiment
Below, describe with reference to Fig. 1 and of the present inventionly to detect quickly and easily that voltage jumps and the method for bust.This method may further comprise the steps:
Step S1: produce reference sinusoidal signal y (t) with power supply voltage signal v (t) homophase fixed amplitude;
Step S2: carry out rectification to power supply voltage signal with reference to sinusoidal signal;
Step S3: the power supply voltage signal after the rectification and the reference sinusoidal signal after the rectification compared obtain representing whether voltage jumps or the testing result of bust.
In described comparison step, be that the reference sinusoidal signal that power supply voltage signal after the rectification deducts after the rectification obtains testing result.At this moment, can directly think when testing result ε (t) greater than 0, promptly ε (t)=| v (t) |-| y (t) |＞0 o'clock, the expression voltage jump; When testing result ε (t) less than 0, promptly ε (t)=| v (t) |-| y (t) |＜0 o'clock, the expression voltage die.Usually, ε (t) is to double supply frequency even higher frequency promptly fluctuates.Because Utilities Electric Co.'s power supply of generally allowing them to provide has 5% fluctuation, therefore correspondingly, the scheme that advise the front can also be modified as: when testing result ε (t) greater than preset positive value for example ε (t)＞-during 0.05M, expression voltage jumps; When testing result ε (t) less than predetermined negative value for example ε (t)＜-during 0.05M, the expression voltage die, wherein M is the amplitude of normal power source.
Certainly, in described comparison step, can also be that the power supply voltage signal that reference sinusoidal signal after the rectification deducts after the rectification obtains testing result.At this moment, can directly think when testing result ε (t) less than 0, promptly ε (t)=| y (t) |-| v (t) |＜0 o'clock, the expression voltage jump; When testing result ε (t) greater than 0 be ε (t)=| y (t) |-| v (t) | in the time of＞0, the expression voltage die.With the front in like manner, can also be modified as: ε (t)＜-0.05M, represent that then voltage jumps; ε (t)＞-0.05M, then represent voltage die.
In addition, in order to have more level and smooth output, be that the simple firstorder filter of supply frequency carries out filtering to ε (t) by cutoff frequency, for example cutoff frequency is 50Hz.
Voltage of the present invention jumps and the detector of bust comprises:
With reference to sinusoidal signal generator, be used for input supply voltage signal v (t) and the reference sinusoidal signal y (t) of generation and power supply voltage signal homophase fixed amplitude;
First rectification circuit is used for the input supply voltage signal and power supply voltage signal is carried out rectification;
Second rectification circuit is connected in reference to sinusoidal signal generator, is used for input and with reference to sinusoidal signal the reference sinusoidal signal is carried out rectification;
Comparer is connected in first rectification circuit and second rectification circuit, is used for power supply voltage signal after the rectification and the reference sinusoidal signal after the rectification are compared, and obtains representing whether voltage jumps or the testing result ε of bust (t).
Wherein, described comparer can be set to the reference sinusoidal signal that power supply voltage signal after the rectification deducts after the rectification and obtain testing result, also can be set to the power supply voltage signal that reference sinusoidal signal after the rectification deducts after the rectification and obtain testing result.
In order to have more level and smooth output, voltage of the present invention jumps and the detector of bust also comprises ε (t) is carried out filtering and obtains ε
F(t) simple firstorder filter, its cutoff frequency are for example 50Hz of supply frequency.
Wherein, can buy from the market with reference to sinusoidal signal generator.
Referring to Fig. 3, it illustrates: constitute two absolute value circuits (being above-mentioned two rectification circuits) by two blocks of TL074 plates; Constitute comparer by a TL074 plate; Constitute simple firstorder filter by resistance and electric capacity, the cutoff frequency of this low-pass first order filter is set to 50Hz.
Power supply voltage signal V
InWith reference sinusoidal signal V
RefOffer an absolute value circuit respectively, carry out rectification by the latter.Afterwards, the power supply voltage signal V after the rectification
InWith the reference sinusoidal signal V after the rectification
RefOffering comparer compares.Afterwards, comparer offers firstorder filter with comparative result ε (t) and carries out filtering.
Testing result is outputed in the oscillograph, promptly obtain Fig. 4 and experimental result shown in Figure 5.In Fig. 4 and Fig. 5, channel 1 expression supply voltage v (t) represents 5V by each line segment that dotted line is cut apart; The output of channel 2 expression detecting devices is ε as a result
F(t), each line segment of being cut apart by dotted line is represented 1V.Suppose that the power supply amplitude that needs is approximately 9V.
Fig. 4 illustrates the tracking results ε of this detecting device when power supply has 20% bust
F(t).As seen from Figure 4, the output of this detecting device quickly falls to and is lower than-0.45V when power supply has bust, and this incident was detected in 1/4 oscillation period.
The tracking results ε of this detecting device when Fig. 5 illustrates power supply and has 25% to jump
F(t).As seen from Figure 5, be higher than 0.45V when power supply has when jumping the output of this detecting device rise to rapidly, and this incident was detected in 1/4 oscillation period.
From Fig. 4 and Fig. 5, can see intuitively, the result who has 20% bust and 25% variation that jumps to test in the power supply be shown in 1/4 oscillation period, promptly to trace into jumping or bust of voltage.
To sum up, the present invention is by the reference sinusoidal signal of acquisition with the fixed amplitude of power supply voltage signal homophase, and power supply voltage signal after the rectification and the reference sinusoidal signal after the rectification compared, can promptly disclose power supply whether jumping of voltage or bust are arranged, thereby compensate quickly, reduce destruction system.Detection scheme of the present invention only needs just to detect jumping and bust of voltage 1/4 oscillation period, thereby can improve response speed significantly.And the present invention can use mimic channel to implement at an easy rate, and needn't use digital circuit, thereby realizes that cost of the present invention also is reduced.
What need statement is, though the present invention describe in detail by above-mentioned specific embodiment, yet above-mentioned specific embodiment only is schematically, and can not be used for limiting the present invention.Those skilled in the art is in spirit of the present invention and principle, when making various modifications or modification.Protection scope of the present invention is as the criterion with the protection domain of appending claims.
Claims (14)
1. a voltage that does not use digital circuit jumps and the detection method of bust, it is characterized in that may further comprise the steps:
Directly produce reference sinusoidal signal with this power supply voltage signal homophase fixed amplitude from power supply voltage signal;
Carry out rectification to power supply voltage signal with reference to sinusoidal signal;
Power supply voltage signal after the rectification and the reference sinusoidal signal after the rectification compared obtain representing whether voltage jumps or the testing result of bust.
2. voltage as claimed in claim 1 jumps and the detection method of bust, it is characterized in that, in described comparison step, the reference sinusoidal signal that the power supply voltage signal after the rectification deducts after the rectification obtains testing result.
3. voltage as claimed in claim 2 jumps and the detection method of bust, it is characterized in that, in described comparison step, when testing result greater than 0 the time, expression voltage jumps; When testing result less than 0 the time, the expression voltage die.
4. voltage as claimed in claim 2 jumps and the detection method of bust, it is characterized in that, in described comparison step, when testing result during greater than preset positive value, expression voltage jumps; When testing result during less than predetermined negative value, the expression voltage die.
5. voltage as claimed in claim 1 jumps and the detection method of bust, it is characterized in that, in described comparison step, the power supply voltage signal that the reference sinusoidal signal after the rectification deducts after the rectification obtains testing result.
6. voltage as claimed in claim 5 jumps and the detection method of bust, it is characterized in that, in described comparison step, when testing result less than 0 the time, expression voltage jumps; When testing result greater than 0 the time, the expression voltage die.
7. voltage as claimed in claim 5 jumps and the detection method of bust, it is characterized in that, in described comparison step, when testing result during less than predetermined negative value, expression voltage jumps; When testing result during greater than preset positive value, the expression voltage die.
8. voltage as claimed in claim 1 jumps and the detection method of bust, it is characterized in that, also comprises the step of testing result being carried out low-pass filtering after described comparison step.
9. voltage as claimed in claim 8 jumps and the detection method of bust, it is characterized in that in the step of described low-pass filtering, cutoff frequency is the frequency of power supply voltage signal.
10. a voltage that does not use digital circuit jumps and the detector of bust, it is characterized in that comprising:
With reference to sinusoidal signal generator, be used for the input supply voltage signal and direct reference sinusoidal signal from power supply voltage signal generation and power supply voltage signal homophase fixed amplitude;
First rectification circuit is used for the input supply voltage signal and power supply voltage signal is carried out rectification;
Second rectification circuit is connected in reference to sinusoidal signal generator, is used for input and with reference to sinusoidal signal the reference sinusoidal signal is carried out rectification;
Comparer is connected in first rectification circuit and second rectification circuit, is used for power supply voltage signal after the rectification and the reference sinusoidal signal after the rectification are compared, and obtains representing whether voltage jumps or the testing result of bust.
11. voltage as claimed in claim 10 jumps and the detector of bust, it is characterized in that, the reference sinusoidal signal that the power supply voltage signal of described comparer after the rectification deducts after the rectification obtains testing result.
12. voltage as claimed in claim 10 jumps and the detector of bust, it is characterized in that, the power supply voltage signal that the reference sinusoidal signal of described comparer after the rectification deducts after the rectification obtains testing result.
13. voltage as claimed in claim 10 jumps and the detector of bust, it is characterized in that also comprising:
Low-pass first order filter is connected in comparer, and testing result is carried out low-pass filtering.
14. voltage as claimed in claim 13 jumps and the detector of bust, the cutoff frequency of described low-pass first order filter is the frequency of power supply voltage signal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100938099A CN101093232B (en) | 2006-06-19 | 2006-06-19 | Fast detector for surging or sudden drawdown voltages, and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2006100938099A CN101093232B (en) | 2006-06-19 | 2006-06-19 | Fast detector for surging or sudden drawdown voltages, and method |
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| Publication Number | Publication Date |
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| CN101093232A CN101093232A (en) | 2007-12-26 |
| CN101093232B true CN101093232B (en) | 2011-04-06 |
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| CN102778601B (en) * | 2011-09-08 | 2015-07-15 | 中国科学院光电研究院 | Overcurrent jitter detection method and protective circuit for high-voltage pulse power supply |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2588634Y (en) * | 2002-11-20 | 2003-11-26 | 沙万乾 | Intelligent electricity distribution cabinet |
| CN1692284A (en) * | 2003-06-05 | 2005-11-02 | 三菱电机株式会社 | Instantaneous voltage lowering detection device |
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- 2006-06-19 CN CN2006100938099A patent/CN101093232B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2588634Y (en) * | 2002-11-20 | 2003-11-26 | 沙万乾 | Intelligent electricity distribution cabinet |
| CN1692284A (en) * | 2003-06-05 | 2005-11-02 | 三菱电机株式会社 | Instantaneous voltage lowering detection device |
Non-Patent Citations (3)
| Title |
|---|
| JP昭63-163177A 1988.07.06 |
| JP特开2003-294791A 2003.10.15 |
| JP特开平5-232157A 1993.09.07 |
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