CN102420592A - Short-time pulse interference elimination device and implementation method based on high-iron sensor environment - Google Patents
Short-time pulse interference elimination device and implementation method based on high-iron sensor environment Download PDFInfo
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Abstract
The invention provides a method and device for treating short-time pulse interference. The device comprises a high-pass filtering module, a pulse detecting module and a pulse eliminating module. Influence from signal absolute amplitude is removed through high-pass filtering; the pulse detecting module detects the short-time pulse interference and outputs a pulse indication; the pulse eliminating module eliminates the short-time pulse interference from signals; and both the high-pass filtering and the pulse interference eliminating perform according to the pulse indication. With the main processes performed in a time domain, the method disclosed by the invention is easier for implementation and really effective on pulse reference elimination.
Description
Technical Field
The invention relates to a short-time pulse interference processing technology based on a high-speed rail multi-sensor environment, which supports various sensors on a high-speed train and has a good inhibiting effect on possible short-time pulse interference signals.
Background
The actual operating environment of the sensor can suffer from various interferences, which are superposed on the useful signal, affect the accuracy of the useful signal and even cause the unusable useful signal. Impulse disturbances (as shown in fig. 1) are typical of these, and possible sources include automobile spark plug discharge, intermittent electromagnetic interference, and the like. Its behavior is generally non-continuous in time, consisting of irregular pulses or noise spikes of short duration and large amplitude, and exhibits a large bandwidth in the frequency domain.
For a sensor with digital output, impulse noise can be effectively resisted by adopting the modes of error correction coding and an interleaver, and a receiving side can not even do any processing. However, for the analog output sensor, the impulse noise can greatly affect the data representation, and for the sensor application in the measurement and control occasion, even false alarm and misjudgment can be generated, so that an effective means is needed to suppress the impulse noise influence.
The processing of the impulse interference is typically performed in the digital domain, as shown in fig. 2, and the sensor signal processing is performed in the analog domain as well as the filtering, signal conditioning, anti-aliasing filtering and ADC, and the sensor signal processing is performed in the digital domain.
Generally, in the digital domain, a simple approach to dealing with impulse interference can be to use narrow band filters. Narrow-band filters are conceptually easy to understand, but have significant disadvantages:
1) the potential large bandwidth and high instantaneous amplitude of pulse interference require very narrow filter bandwidth, which means that the number of filter stages is large and the realization delay is large;
2) the narrow filter will cause loss to the signal itself, and the influence of signal damage and interference suppression needs to be balanced, and the parameters are difficult to select.
There is also a method for processing impulse interference in time domain, the basic idea is to use the feature that the instantaneous amplitude of impulse interference is much larger than that of normal signal, regard the impulse interference exceeding a certain amplitude threshold as impulse interference, and then limit or replace the data of the impulse interference position. The amplitude threshold is chosen based on experience and is rarely automatically set and adjusted.
In addition, there are some methods based on statistical models, which describe signals or impulse noise by mathematical tools like hidden markov process or linear prediction model, and these methods have high implementation complexity and certain requirements for signal characteristics, and are usually not suitable for engineering application.
Disclosure of Invention
The embodiment of the invention provides a method and a device for eliminating short-time pulse noise. The invention is mainly processed in time domain, but compared with the existing method, the invention mainly improves the following 5 points:
1) removing the influence of the absolute amplitude of the signal through primary high-pass filtering;
2) providing a theoretical basis for designing an amplitude threshold of an amplifier;
3) the amplitude threshold has the capability of automatic adjustment according to the signal characteristics;
4) the method is insensitive to the waveform characteristics of pulse noise;
5) the realization is simple.
The invention is realized by the following technical scheme: (in the following, the claims will be modified with the attached remarks)
A glitch cancellation method, comprising the steps of:
1) inputting the interfered original data to pass through a primary high-pass filtering module for high-pass filtering to remove the influence of the absolute amplitude of the signal;
2) performing pulse detection on the signal processed in the step 1), and further outputting a pulse interference indication to indicate whether pulse interference exists;
3) according to the pulse interference indication input in the step 2), the original data input is subjected to pulse elimination.
Further, the specific steps of step 1) are as follows:
11) when the original data is input, the original data is selected to be output through a selector 1 according to the indication of whether the short-time pulse is detected or not;
12) then, the output of the selector 1 is input into the low-pass filter 1, and the output of the low-pass filter 1 is fed back to the selector 1;
13) finally, subtracting the output of the low-pass filter 1 from the original input data to obtain the data subjected to high-pass filtering;
when the selector 1 selects the output data according to the indication of whether the short-time pulse is detected, if the short-time pulse exists, the output of the low-pass filter 1 is selected, otherwise, the original input data is selected for output.
Further, the specific steps of step 2) are as follows:
21) outputting the high-pass signal in the step 1) to obtain an absolute value, so that the amplitude values of the signal are positive values;
22) then the signal is passed through a selector 2 to select the output data according to the indication of whether the short-time pulse is detected;
23) then, inputting the signal output by the selector 2 into the low-pass filter 2, and feeding back the output of the low-pass filter 2 to the selector 2;
24) the signal output by the low-pass filter 2 passes through a regulator, the regulator adds a bias to the signal to regulate the signal to obtain the maximum value of the signal, and if the signal amplitude is larger than the value, the signal amplitude is defined as a pulse;
25) after the regulator, a flow of 'taking a larger value' is added, the maximum value just obtained is compared with a reference value, and the larger value is taken;
26) comparing the signal with absolute value with the signal after adjustment, if the former is still far larger than the latter, the former is regarded as short-time pulse interference, and a pulse prompt is output;
wherein, when the selector 2 selects the output data according to the indication of whether the short-time pulse is detected, if the short-time pulse exists, the output of the low-pass filter 2 is selected, otherwise, the signal output in the step 21) is selected for output.
The value of the offset in step 24) is 3 times the standard deviation of the signal output by the low-pass filter 2.
Step 25) the selection of said reference value is obtained from an empirical accumulation.
Further, the specific steps of step 3) are as follows:
31) inputting the original data into a latch;
32) according to the pulse indication, the latch outputs; under normal conditions, no pulse prompt exists, the latch is opened and updated, and data output is equal to data input; when the pulse interference is detected, the latch is closed and updated, and the data output obtains a signal input value before the latch is closed, namely a signal which is not interfered by the short pulse;
33) selecting the data of the latch output and the input latch, and if pulse interference is detected, selecting the output of the latch as final data to be output; if no glitch is detected, the data input to the latch is output as final data.
An apparatus for glitch cancellation, the apparatus comprising: the device comprises a primary high-pass filtering module, a secondary pulse detection module and a pulse elimination module; wherein,
the first-level high-pass filtering module is used for carrying out high-pass filtering on data input and removing the influence of the absolute amplitude of a signal;
the secondary pulse detection module is used for carrying out pulse detection on the signal processed by the primary high-pass filtering module and further outputting a pulse interference indication to indicate whether pulse interference exists or not;
and the pulse elimination module is used for eliminating the pulse of the input original data according to the pulse interference indication output by the secondary pulse detection module.
Further, the first-stage high-pass filtering module comprises a selector 1, a low-pass filter 1 and a subtracter;
a selector 1 for receiving data input and selecting output data according to the indication of whether the short-time pulse is detected;
a low-pass filter 1 connected to the selector 1, inputting the output of the selector 1 to the low-pass filter 1, and feeding back the output of the low-pass filter 1 to the selector 1;
the subtracter is connected to the low-pass filter 1 and subtracts the output of the low-pass filter 1 from the original input data to obtain high-pass filtered data;
when the selector 1 selects the output data according to the indication of whether the short-time pulse is detected, if the short-time pulse exists, the output of the low-pass filter 1 is selected, otherwise, the original input data is selected for output.
Further, the secondary pulse detection module comprises an absolute value module, a selector 2, a low-pass filter 2, an adjuster, a maximum value taking module and a comparator;
the absolute value module is connected with the first-stage high-pass filtering module and used for outputting an absolute value from the signal output by the first-stage high-pass filtering module so that the amplitude of the signal is a positive value;
the selector 2 is connected with the absolute value module, and the signal output by the absolute value module passes through the selector 2 to select the output data according to the indication of whether the short-time pulse is detected or not;
a low-pass filter 2 connected to the selector 2, for inputting the signal output from the selector 2 into the low-pass filter 2 and feeding back the output from the low-pass filter 2 to the selector 2;
a regulator connected to the low pass filter 2 for increasing an offset to the output of the low pass filter 2 to regulate the signal to obtain a maximum value of the signal, and if the signal amplitude is larger than the maximum value, the signal amplitude is defined as a pulse;
a larger value module connected to the adjuster, the largest value obtained from the adjuster being compared with a reference value and the larger value being selected;
the comparator compares the signal with absolute value with the adjusted signal output by the adjuster, if the former is still far larger than the latter, the former is regarded as short-time pulse interference, and a pulse prompt is output;
when the selector 2 selects the output data according to the indication of whether the short-time pulse is detected, if the short-time pulse exists, the output of the low-pass filter 2 is selected, otherwise, the absolute value module outputs the signal which is output by the absolute value module and takes the absolute value, and the signal is output.
Further, the value of the offset is 3 times the standard deviation of the signal output by the low-pass filter 2.
Furthermore, the reference value is selected from experience accumulation, and the acquisition method is to observe and record the rules and characteristics of the original data and find out the general amplitude of the pulse interference in the data.
Further, the pulse cancellation module comprises a latch and selector 3;
a latch connected to the secondary pulse detection module, receiving an output signal from the secondary pulse detection module; according to the pulse indication, the latch outputs; under normal conditions, no pulse prompt exists, the latch is opened and updated, and data output is equal to data input; when the pulse interference is detected, the latch is closed and updated, and the data output obtains a signal input value before the latch is closed, namely a signal which is not interfered by the short pulse;
a selector 3 connected to the latch, selecting the latch output and the data input to the latch, and if the pulse interference is detected, selecting the latch output as the final data to be output; if no glitch is detected, the data input to the latch is output as final data.
Drawings
FIG. 1 is a schematic diagram of impulse noise;
FIG. 2 is a sensor signal processing chain;
FIG. 3 is a schematic block diagram of a clock pulse elimination apparatus according to the present invention;
FIG. 4 is a first-level high-pass filtering module;
FIG. 5 is a two-stage pulse detection module;
FIG. 6 is a graph of a probability density function of a Gaussian distribution;
FIG. 7 is a pulse cancellation module;
FIG. 8 is a basic flowchart of the method for eliminating glitches of the present invention;
FIG. 9 shows the specific steps of glitch elimination;
FIG. 10 is an input raw signal containing short duration pulses in an example of a simulation performed in accordance with the method of the present invention;
fig. 11 shows the processed signal in an example of a simulation performed according to the method of the invention.
Detailed Description
Referring to fig. 3, it is a basic block diagram of the glitch elimination apparatus of the present invention, which includes a first-stage high-pass filtering module 301, a second-stage pulse detecting module 302 and a pulse eliminating module 303,
the first-level high-pass filtering module 301 is used for performing high-pass filtering on data input and removing the influence of the absolute amplitude of a signal;
a secondary pulse detection module 302, configured to perform pulse detection on the signal processed by the primary high-pass filtering module, and further output a pulse interference indication to indicate whether there is pulse interference;
and the pulse elimination module 303 is configured to perform pulse elimination on the input original data according to the pulse interference indication output by the secondary pulse detection module.
Referring to fig. 4, 5 and 7, the specific structure of the first-stage high-pass filtering module 301, the second-stage pulse detecting module 302 and the pulse eliminating module 303 is shown.
1. A first-level high-pass filtering module, as shown in fig. 4. The input signal is passed through a first high pass filter, and the signal measured by the sensor itself is the sensor with its absolute amplitude, such as temperature, air pressure, etc. For processing convenience, it is desirable to remove the absolute amplitude of the signal, which is equivalent to removing the dc component, and the remaining signal component is white noise fluctuating on and off the axis. The analysis of this module was expanded as follows:
when the disturbed raw data is input, it is passed through the selector 1 to select the output data according to the indication of whether or not the short-time pulse is detected, and the "pulse indication" will be referred to later (in the pulse detection module, the pulse indication here is the output of the pulse detection module). If the pulse exists, the output of the low-pass filter 1 is selected, otherwise, the data input at the front end is selected for output. This is because the output of the low-pass filtering should be kept constant after the pulse is detected in order to prevent the instantaneous large pulse from pulling up the absolute amplitude.
Since the implementation of the high-pass filter is complicated, the low-pass filter for selection is used in combination with the subtractor. The output of the low-pass filter 1 is a low-frequency signal and a direct-current component, and the original signal is subtracted by the low-pass output of the subtracter, so that a white noise component, a short-time pulse interference component and other noise components of the signal can be obtained.
2. Two-stage pulse detection, as shown in fig. 5. The high-pass signal output in 1 is taken as the absolute value, so that the amplitude of the signal is positive. Then the signal of the absolute value is passed through the selector 2, according to the pulse indication, the selector 2 outputs the corresponding signal, if there is pulse indication, the output of the low-pass filter 2 is selected, otherwise, the signal after the absolute value is selected to be output. The selected signal is passed through a low pass filter 2, known from the principle of low pass filterIf the filter takes a certain cut-off frequency and pass band, the output of the filter can be the DC mean value of the signal. From the theory of communication principle, it is known that white noise signal belongs to gaussian distribution signal, and from the probability density graph (i.e. fig. 6) of gaussian distribution signal, the area between the axis and the curve is constantly equal to 1. Empirically, the interval of the horizontal axis under the curve (
，) (wherein
In order for the signal to be expected,
is the standard deviation of the signal) is 68.268949%, the horizontal axis interval (
Area in (b) 95.449974%, horizontal axis interval (b)，
) The inner area is 99.730020%, which means that the probability of the signal amplitude being larger than 3 times the standard deviation is very small and almost negligible. That is, the maximum value of the signal can be obtained by adding an offset to the output of the low-pass filter 2 by a value of 3 times the standard deviation, and by default, if the signal amplitude is larger than this value, the maximum value is defined as a pulse.
After the regulator, a "take larger value" procedure is added to compare the just obtained maximum value with a reference value, and take the larger one, because if the average value of the signal is smaller, the regulated value is still smaller, which affects the later pulse judgment. The reference value is selected from experience accumulation, and the acquisition method is to observe and record the rules and characteristics of the original data and find out the general amplitude of the pulse interference in the data.
Compared with the signal after the adjustment, if the former is still far larger than the latter, the probability of the occurrence in the gaussian probability distribution is very small, so that the signal can be regarded as short-time pulse interference and a pulse prompt is output.
3. The pulse cancellation module is shown in fig. 7. After obtaining the pulse prompt, the module determines the output of the signal. Under normal conditions, no pulse prompt exists, the latch is opened and updated, and data output is equal to data input; when the pulse interference is detected, the latch is closed and updated, and the data output takes the signal input value obtained before the latch is closed, namely the normal value.
When the input signal has large sudden change instantaneously, such as rapid and large-amplitude adjustment of sensing quantity in a debugging stage, and the signal is stable at a new mean level after the change is finished, the pulse indication of the upper graph is possibly locked. Therefore, when the pulse indication is given, a counter is started synchronously for the latch, the counter is provided with an upper limit (the value is slightly larger than the maximum width of the pulse which may occur), the value of the upper limit is generally determined by an empirical value, and when the count is full, the pulse indication is automatically set to zero to open the latch input for updating. However, when the count is full, the pulse indicates high, the pulse is reset, the latch is re-closed, and the output is the second updated input value.
Referring to FIG. 8, it is a basic flow chart of the glitch elimination apparatus of the present invention.
After the signal is inputted to the short pulse eliminating device,
step 801, inputting data through a first-level high-pass filtering module, performing high-pass filtering, and removing influence of signal absolute amplitude;
step 802, performing pulse detection on the signal processed in step 301, and outputting a pulse interference indication to indicate whether pulse interference exists;
and step 803, according to the impulse interference indication input in the step 302, carrying out impulse elimination on the original data input.
Referring to fig. 9, the specific steps of the glitch removal are shown:
step 901, when data is input, selecting the output data according to the instruction of whether the short-time pulse is detected or not by the selector 1;
step 902, then inputting the output of the selector 1 into the low-pass filter 1, and feeding back the output of the low-pass filter 1 to the selector 1;
step 903, subtracting the output of the low-pass filter 1 from the original input data to obtain the data subjected to high-pass filtering;
when the selector 1 selects the output data according to the indication of whether the short-time pulse is detected, if the short-time pulse exists, the output of the low-pass filter 1 is selected, otherwise, the original input data is selected for output.
Step 904, outputting the high-pass signal in the step 903 to obtain an absolute value, so that the amplitude of the signal is a positive value;
step 905, then, passing the signal through the selector 2, and selecting the output data according to the indication of whether the short-time pulse is detected;
step 906, inputting the signal output by the selector 2 into the low-pass filter 2, and feeding back the output of the low-pass filter 2 to the selector 2;
step 907, adding a bias to the output of the low-pass filter 2 to adjust the signal to obtain the maximum value of the signal, and if the signal amplitude is larger than the maximum value, defining the signal amplitude as a pulse;
step 908, after the regulator, adding a "get greater value" procedure, comparing the just obtained maximum value with a reference value, and getting the greater one;
step 909, comparing the absolute value of the signal with the adjusted signal, if the former is still much larger than the latter, then it is regarded as short-time pulse interference and outputs a pulse prompt;
when the selector 2 selects the output data according to the indication of whether the short-time pulse is detected, if the short-time pulse exists, the output of the low-pass filter 2 is selected, otherwise, the signal of which the absolute value is output in the step is selected to be output.
Step 910, inputting the original data into a latch;
step 911, according to the pulse indication, the latch outputs; under normal conditions, no pulse prompt exists, the latch is opened and updated, and data output is equal to data input; when pulse interference is detected, the latch is closed and updated, and the data output is the signal input value obtained before the latch is closed, namely the normal value;
step 912, selecting the latch output and the data input to the latch, and if pulse interference is detected, selecting the output of the latch as the final data to be output; if no glitch is detected, the data input to the latch is output as final data.
The following simulation results can be obtained by performing simulation according to the method of the invention:
the processing method provided by the invention is subjected to simulation verification by utilizing signals acquired during sensor debugging. As can be seen from fig. 10, most of the collected original signals are steadily fluctuated, but there are several large-amplitude short-duration pulses. For these interferences, it is worth proposing that the parameters in the regulator are processed by the method proposed in the present invention
Take 3 times the standard deviation of the signal.
As can be seen from fig. 11, the short-time pulse is substantially eliminated, and thus, this method is very simple to implement, and the implementation method is not particularly sensitive to the shape and the retention time of the pulse, but only to the amplitude of the pulse, and most importantly, the threshold value does not need to be preset, and the system automatically adjusts the threshold value according to the signal characteristics.
It will be understood by those skilled in the art that all or part of the steps of implementing the above method embodiments may be implemented by hardware associated with program instructions, and the program may be stored in a computer readable storage medium, and when executed, performs the steps including the above method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (12)
1. A glitch cancellation method, comprising:
inputting the original data through a first-level high-pass filtering module, performing high-pass filtering, and removing the influence of the absolute amplitude of the signal;
performing pulse detection on the signal processed in the step 1), and further outputting a pulse interference indication to indicate whether pulse interference exists;
according to the pulse interference indication input in the step 2), the original data input is subjected to pulse elimination.
2. The glitch cancellation method of claim 1, further comprising:
the specific steps of the step 1) are as follows:
11) when the original data is input, the original data is selected to be output through a selector 1 according to the indication of whether the short-time pulse is detected or not;
12) then, the output of the selector 1 is input into the low-pass filter 1, and the output of the low-pass filter 1 is fed back to the selector 1;
13) finally, subtracting the output of the low-pass filter 1 from the original input data to obtain the data subjected to high-pass filtering;
when the selector 1 selects the output data according to the indication of whether the short-time pulse is detected, if the short-time pulse exists, the output of the low-pass filter 1 is selected, otherwise, the original input data is selected for output.
3. The glitch cancellation method of claim 1 or 2, further comprising:
the specific steps of the step 2) are as follows:
21) outputting the high-pass signal in the step 1) to obtain an absolute value, so that the amplitude values of the signal are positive values;
22) then the signal is passed through a selector 2 to select the output data according to the indication of whether the short-time pulse is detected;
23) then, inputting the signal output by the selector 2 into the low-pass filter 2, and feeding back the output of the low-pass filter 2 to the selector 2;
24) the signal output by the low-pass filter 2 passes through a regulator, the regulator adds a bias to the signal to regulate the signal to obtain the maximum value of the signal, and if the signal amplitude is larger than the value, the signal amplitude is defined as a pulse;
25) after the regulator, a step of "taking a larger value" is carried out, i.e. the maximum value obtained in step 24) is compared with a reference value, the larger one being taken;
26) comparing the signal with absolute value with the signal after adjustment, if the former is still far larger than the latter, the former is regarded as short-time pulse interference, and a pulse prompt is output;
wherein, when the selector 2 selects the output data according to the indication of whether the short-time pulse is detected, if the short-time pulse exists, the output of the low-pass filter 2 is selected, otherwise, the signal output in the step 21) is selected for output.
4. The glitch cancellation method of claim 3, further comprising: the value of the offset in step 24) is 3 times the standard deviation of the signal output by the low-pass filter 2.
5. The glitch cancellation method of claim 3, further comprising: step 25) the selection of said reference value is obtained from an empirical accumulation.
6. The glitch cancellation method of claim 1 or 2, further comprising:
31) inputting the original data into a latch;
32) according to the pulse indication, the latch outputs; under normal conditions, no pulse prompt exists, the latch is opened and updated, and data output is equal to data input; when the pulse interference is detected, the latch is closed and updated, and the data output takes the signal input value before the latch is closed, namely the signal which is not interfered by the short pulse;
33) selecting the data of the latch output and the input latch, and if pulse interference is detected, selecting the output of the latch as final data to be output; if no glitch is detected, the data input to the latch is output as final data.
7. An apparatus for glitch cancellation, the apparatus comprising: the device comprises a primary high-pass filtering module, a secondary pulse detection module and a pulse elimination module; wherein,
the first-level high-pass filtering module is used for carrying out high-pass filtering on data input and removing the influence of the absolute amplitude of a signal;
the secondary pulse detection module is used for carrying out pulse detection on the signal processed by the primary high-pass filtering module and further outputting a pulse interference indication to indicate whether pulse interference exists or not;
and the pulse elimination module is used for eliminating the pulse of the input original data according to the pulse interference indication output by the secondary pulse detection module.
8. The glitch cancellation apparatus of claim 7, further comprising:
the first-stage high-pass filtering module comprises a selector 1, a low-pass filter 1 and a subtracter;
a selector 1 for receiving data input and selecting output data according to the indication of whether the short-time pulse is detected;
a low-pass filter 1 connected to the selector 1, inputting the output of the selector 1 to the low-pass filter 1, and feeding back the output of the low-pass filter 1 to the selector 1;
the subtracter is connected to the low-pass filter 1 and subtracts the output of the low-pass filter 1 from the original input data to obtain high-pass filtered data;
when the selector 1 selects the output data according to the indication of whether the short-time pulse is detected, if the short-time pulse exists, the output of the low-pass filter 1 is selected, otherwise, the original input data is selected for output.
9. The glitch cancellation method of claim 7 or 8, further comprising:
the second-stage pulse detection module comprises an absolute value module, a selector 2, a low-pass filter 2, an adjuster, a maximum value taking module and a comparator;
the absolute value module is connected with the first-stage high-pass filtering module and used for outputting an absolute value from the signal output by the first-stage high-pass filtering module so that the amplitude of the signal is a positive value;
the selector 2 is connected with the absolute value module, and the signal output by the absolute value module passes through the selector 2 to select the output data according to the indication of whether the short-time pulse is detected or not;
a low-pass filter 2 connected to the selector 2, for inputting the signal output from the selector 2 into the low-pass filter 2 and feeding back the output from the low-pass filter 2 to the selector 2;
a regulator connected to the low pass filter 2 for increasing an offset to the output of the low pass filter 2 to regulate the signal to obtain a maximum value of the signal, and if the signal amplitude is larger than the maximum value, the signal amplitude is defined as a pulse;
a larger value module connected to the adjuster, the largest value obtained from the adjuster being compared with a reference value and the larger value being selected;
the comparator compares the signal with absolute value with the adjusted signal output by the adjuster, if the former is still far larger than the latter, the former is regarded as short-time pulse interference, and a pulse prompt is output;
when the selector 2 selects the output data according to the indication of whether the short-time pulse is detected, if the short-time pulse exists, the output of the low-pass filter 2 is selected, otherwise, the absolute value module outputs the signal which is output by the absolute value module and takes the absolute value, and the signal is output.
10. The glitch cancellation apparatus of claim 9, further comprising: the value of the offset is 3 times the standard deviation of the signal output by the low pass filter 2.
11. The glitch cancellation apparatus of claim 9, further comprising: the reference value is selected from experience accumulation, and the acquisition method is to observe and record the rules and characteristics of the original data and find out the general amplitude of the pulse interference in the data.
12. The glitch cancellation apparatus of claim 7 or 8, further comprising:
the pulse cancellation module comprises a latch and a selector 3;
a latch connected to the secondary pulse detection module, receiving an output signal from the secondary pulse detection module; according to the pulse indication, the latch outputs; under normal conditions, no pulse prompt exists, the latch is opened and updated, and data output is equal to data input; when the pulse interference is detected, the latch is closed and updated, and the data output obtains a signal input value before the latch is closed, namely a signal which is not interfered by the short pulse;
a selector 3 connected to the latch, selecting the latch output and the data input to the latch, and if the pulse interference is detected, selecting the latch output as the final data to be output; if no glitch is detected, the data input to the latch is output as final data.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013078991A1 (en) * | 2011-11-28 | 2013-06-06 | 浙江网新技术有限公司 | High-speed rail sensor environment-based short-term pulse interference-elimination device and implementation method |
| CN104714108A (en) * | 2015-03-24 | 2015-06-17 | 中国铁路总公司 | Ground train transient impulse interference field intensity analysis system |
| CN105004877A (en) * | 2015-07-15 | 2015-10-28 | 成都森川铁路车辆技术开发有限公司 | Wheel sensor signal processing method and wheel sensor signal processing system |
| CN106533499A (en) * | 2015-09-09 | 2017-03-22 | 晨星半导体股份有限公司 | Pulse interference cancellation device and pulse interference cancellation method |
| CN113325265A (en) * | 2021-05-12 | 2021-08-31 | 武汉三相电力科技有限公司 | Device for detecting mixed traveling wave in power transmission line |
| CN113359965A (en) * | 2021-06-18 | 2021-09-07 | 浪潮电子信息产业股份有限公司 | Temperature adjusting method and related assembly |
Families Citing this family (1)
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| CN113848391B (en) * | 2021-09-26 | 2024-04-09 | 成都华日通讯技术股份有限公司 | Pulse signal detection and extraction method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101005278A (en) * | 2006-01-16 | 2007-07-25 | 联发科技股份有限公司 | Impulse noise remover and related method |
| CN101086856A (en) * | 2006-06-05 | 2007-12-12 | 联发科技股份有限公司 | High pass filtering device and an optical disc drive servo control device |
| CN102035774A (en) * | 2009-09-25 | 2011-04-27 | 上海伽利略导航有限公司 | Single-frequency carrier phase positioning method and device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003198393A (en) * | 2001-12-26 | 2003-07-11 | Niigata Seimitsu Kk | Noise removing circuit |
| CN100562064C (en) * | 2006-06-29 | 2009-11-18 | 上海高清数字科技产业有限公司 | Be used for the method and apparatus that erasure signal disturbs |
| CN102420592B (en) * | 2011-11-28 | 2015-01-14 | 浙江网新技术有限公司 | Short-time pulse interference elimination device and implementation method based on high-iron sensor environment |
-
2011
- 2011-11-28 CN CN201110381592.2A patent/CN102420592B/en active Active
-
2012
- 2012-11-28 WO PCT/CN2012/085432 patent/WO2013078991A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101005278A (en) * | 2006-01-16 | 2007-07-25 | 联发科技股份有限公司 | Impulse noise remover and related method |
| CN101086856A (en) * | 2006-06-05 | 2007-12-12 | 联发科技股份有限公司 | High pass filtering device and an optical disc drive servo control device |
| CN102035774A (en) * | 2009-09-25 | 2011-04-27 | 上海伽利略导航有限公司 | Single-frequency carrier phase positioning method and device |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013078991A1 (en) * | 2011-11-28 | 2013-06-06 | 浙江网新技术有限公司 | High-speed rail sensor environment-based short-term pulse interference-elimination device and implementation method |
| CN104714108A (en) * | 2015-03-24 | 2015-06-17 | 中国铁路总公司 | Ground train transient impulse interference field intensity analysis system |
| CN105004877A (en) * | 2015-07-15 | 2015-10-28 | 成都森川铁路车辆技术开发有限公司 | Wheel sensor signal processing method and wheel sensor signal processing system |
| CN105004877B (en) * | 2015-07-15 | 2017-11-10 | 成都森川科技股份有限公司 | wheel sensor signal processing method and system |
| CN106533499A (en) * | 2015-09-09 | 2017-03-22 | 晨星半导体股份有限公司 | Pulse interference cancellation device and pulse interference cancellation method |
| CN113325265A (en) * | 2021-05-12 | 2021-08-31 | 武汉三相电力科技有限公司 | Device for detecting mixed traveling wave in power transmission line |
| CN113359965A (en) * | 2021-06-18 | 2021-09-07 | 浪潮电子信息产业股份有限公司 | Temperature adjusting method and related assembly |
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| CN102420592B (en) | 2015-01-14 |
| WO2013078991A1 (en) | 2013-06-06 |
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