CN109085375A - A kind of the key phase pulse signal monitoring method and device of rotating machinery - Google Patents
A kind of the key phase pulse signal monitoring method and device of rotating machinery Download PDFInfo
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- G—PHYSICS
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- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
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- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/49—Devices characterised by the use of electric or magnetic means for measuring angular speed using eddy currents
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Abstract
The present invention provides the key phase pulse signal monitoring methods and device of a kind of rotating machinery, are related to rotating machine art field.Method includes: to obtain the time domain waveform sampled signal of the key signal in a sampling timeframe；Each voltage value of key signal is pressed from as low as big or from substantially small sequence arrangement, after forming a sequence array, and chooses the element numerical value corresponding compared with a predeterminated position of big end of numerical value in array as threshold voltage；Determine the corresponding moment point of each key phase pulse signal in key signal；Revolving speed calculating is carried out, a revolving speed sequence is obtained, and judges whether there is the corresponding moment point of key phase pulse signal and loses；When being lost there are the corresponding moment point of key phase pulse signal, reduce threshold voltage described in policy update with a pre-set threshold voltage, the step of corresponding moment point of each key phase pulse signal in key signal is determined before returning, until there is no the corresponding moment points of key phase pulse signal to lose.
Description
Technical field
The present invention relates to rotating machine art field more particularly to a kind of key phase pulse signal monitoring methods of rotating machinery
And device.
Background technique
Rotating machinery, which refers to, relies primarily on the machinery that specific function is completed in spinning movement, such as typical rotating machinery has vapour
Turbine, gas turbine, centrifugal and Axial Flow Compressor, blower, pump, the hydraulic turbine, generator and aero-engine etc..It is revolving
It makes a connection in tool operation process, inevitable vibration can be generated, if vibration is excessive, it will cause biggish harm, make equipment work
Make reduced performance or breaks down and stop working.In addition, the vibration of rotating machinery can also make certain components because by additional load
Lotus and accelerated wear test, fatigue, rupture etc. and influence the service life or cause equipment breakdown.
Currently, in a variety of causes for the abnormality for causing rotating machinery vibrating, ratio shared by rotatable parts imbalance
It is the largest again, accounts for about 30% under normal circumstances, and specific gravity shared by rotatable parts imbalance is bigger in high-speed rotating machine.
Therefore, it is highly desirable to carry out dynamic balancing inspection to the rotatable parts of rotating machinery, if it exists unbalance dynamic phenomenon, then to rotation
Component carries out dynamic balance weight to reduce the vibration of unit, reaches the level of unit energy safe and stable operation.And dynamic balancing
The most key in counterweight is exactly the orientation (or phase) for determining unbalance mass, on condition that it is accurate to obtain key phase pulse
Corresponding moment point.In addition, also often measuring or monitoring in the prior art the revolving speed of rotating machinery using key phase pulse signal, therefore
This also requires to obtain accurate key phase pulse pair to answer at the time of point.
As it can be seen that how to be monitored to the key phase pulse signal of rotating machinery, become with obtaining its corresponding moment point
One urgent problem to be solved.
Summary of the invention
The embodiment of the present invention provides the key phase pulse signal monitoring method and device of a kind of rotating machinery, to realize one kind
The key phase pulse signal of accurate measurements rotating machinery, and accurately determine the technical solution of its corresponding moment point.
In order to achieve the above objectives, the present invention adopts the following technical scheme:
A kind of key phase pulse signal monitoring method of rotating machinery, comprising:
Step 1, obtain a sampling timeframe in key signal time domain waveform sampled signal；The time domain waveform is adopted
Sample signal include each sampling time point time and corresponding key signal voltage value；
Step 2, by each voltage value of key signal by from small to large or descending order arrange, formed one sequence after number
Group, and the element numerical value corresponding compared with a predeterminated position of big end of numerical value in array is chosen as threshold voltage；
Step 3 determines the corresponding moment point of each key phase pulse signal in key signal according to the threshold voltage；
Step 4 carries out revolving speed calculating according to the corresponding moment point of each key phase pulse signal, obtains a revolving speed sequence；
Step 5 judges that key signal is lost with the presence or absence of the corresponding moment point of key phase pulse signal according to the revolving speed sequence
It loses；
Step 6, when being lost there are the corresponding moment point of key phase pulse signal, reduced with a pre-set threshold voltage
Threshold voltage described in policy update, and return to step 3；
Step 7, when being lost there is no the corresponding moment point of key phase pulse signal, determine that the revolving speed sequence is corresponding each
The corresponding moment point of key phase pulse signal is the set of all key phase pulse signal moment points in key signal.
Specifically, it is described by each voltage value of key signal by from small to large or descending order arrange, formed one sequence
Array afterwards, and the element numerical value corresponding compared with a predeterminated position of big end of numerical value in array is chosen as threshold voltage, comprising:
Each voltage value of key signal is pressed from small to large or descending order arranges, the array after forming a sequence；
The small end of numerical value chooses the corresponding element numerical value in a preset percentage position as threshold to compared with big end from array
Threshold voltage.
Specifically, determining the corresponding moment point of each key phase pulse signal in key signal according to the threshold voltage, wrap
It includes:
It obtains the corresponding key signal voltage value x (i) of a sampling time point i and its previous sampling time point i-1 is corresponding
Key signal voltage value x (i-1) and the corresponding key signal voltage value x (i+1) of its latter sampling time point i+1；
It is greater than x (i-1) and x (i+1) in x (i), and when x (i) is more than or equal to the threshold voltage, by i pairs of sampling time point
The key signal answered is as a key phase pulse signal, using sampling time point i as the key phase pulse signal pair at sampling time point i
Point at the time of answering.
Specifically, described carry out revolving speed calculating according to the corresponding moment point of each key phase pulse signal, a revolving speed sequence is obtained,
Include:
According to formula:Determine the revolving speed v (j) of the corresponding moment point of each key phase pulse signal, shape
At a revolving speed sequence；Wherein, v (j) indicates the revolving speed of the corresponding moment point of j-th of key phase pulse signal；T (j) indicates j-th of key
The corresponding moment point of phase pulse signal；T (j+1) indicates the corresponding moment point of+1 key phase pulse signal of jth；
It is described to judge that key signal is lost with the presence or absence of the corresponding moment point of key phase pulse signal according to the revolving speed sequence,
Include:
The revolving speed v (j) of the corresponding moment point of key phase pulse signal to be judged, and and v are obtained in the revolving speed sequence
(j) the revolving speed v (j-1) and v (j+1) of the adjacent corresponding moment point of key phase pulse signal；
?When, determining key signal, there are the corresponding moment points of key phase pulse signal
It loses；The a% is pre-set percentage threshold.
Specifically, it is described when being lost there are the corresponding moment point of key phase pulse signal, with a pre-set threshold value electricity
Pressure reduces threshold voltage described in policy update, comprising:
It is when being lost there are the corresponding moment point of key phase pulse signal, threshold voltage U is updated multiplied by being used as after b%
Threshold voltage；Wherein b% is pre-set percentage, and b is less than 100.
A kind of key phase pulse signal monitoring device of rotating machinery, comprising:
Time domain waveform sampled signal acquiring unit, for obtaining the time domain waveform of the key signal in a sampling timeframe
Sampled signal；The time domain waveform sampled signal include each sampling time point time and corresponding key signal voltage value；
Threshold voltage determination unit is used to press each voltage value of key signal from small to large or descending order arranges,
Array after forming a sequence, and the element numerical value corresponding compared with a predeterminated position of big end of numerical value in array is chosen as threshold value electricity
Pressure；
Key phase pulse signal moment point determination unit, for determining each key phase in key signal according to the threshold voltage
The corresponding moment point of pulse signal；
Speed calculation unit obtains one turn for carrying out revolving speed calculating according to the corresponding moment point of each key phase pulse signal
Fast sequence；
Judging unit is lost, for judging that key signal is corresponding with the presence or absence of key phase pulse signal according to the revolving speed sequence
At the time of point is lost；
Threshold voltage updating unit, for being set in advance with one when being lost there are the corresponding moment point of key phase pulse signal
The threshold voltage set reduces threshold voltage described in policy update；Updated threshold voltage is formed in threshold voltage updating unit
Afterwards, return key phase pulse signal moment point determination unit；
As a result determination unit, for determining the revolving speed when losing there is no the corresponding moment point of key phase pulse signal
The corresponding moment point of the corresponding each key phase pulse signal of sequence is the set of all key phase pulse signal moment points in key signal.
In addition, the threshold voltage determination unit, is specifically used for:
Each voltage value of key signal is pressed from small to large or descending order arranges, the array after forming a sequence；
The small end of numerical value chooses the corresponding element numerical value in a preset percentage position as threshold to compared with big end from array
Threshold voltage.
In addition, the key phase pulse signal moment point determination unit, is specifically used for:
It obtains the corresponding key signal voltage value x (i) of a sampling time point i and its previous sampling time point i-1 is corresponding
Key signal voltage value x (i-1) and the corresponding key signal voltage value x (i+1) of its latter sampling time point i+1；
It is greater than x (i-1) and x (i+1) in x (i), and when x (i) is more than or equal to the threshold voltage, by i pairs of sampling time point
The key signal answered is as a key phase pulse signal, using sampling time point i as the key phase pulse signal pair at sampling time point i
Point at the time of answering.
In addition, the speed calculation unit, is specifically used for:
According to formula:Determine the revolving speed v (j) of the corresponding moment point of each key phase pulse signal, shape
At a revolving speed sequence；Wherein, v (j) indicates the revolving speed of the corresponding moment point of j-th of key phase pulse signal；T (j) indicates j-th of key
The corresponding moment point of phase pulse signal；T (j+1) indicates the corresponding moment point of+1 key phase pulse signal of jth；
The loss judging unit, is specifically used for:
The revolving speed v (j) of the corresponding moment point of key phase pulse signal to be judged, and and v are obtained in the revolving speed sequence
(j) the revolving speed v (j-1) and v (j+1) of the adjacent corresponding moment point of key phase pulse signal；
?When, determining key signal, there are the corresponding moment points of key phase pulse signal
It loses；The a% is pre-set percentage threshold.
In addition, the threshold voltage updating unit, is specifically used for:
It is when being lost there are the corresponding moment point of key phase pulse signal, threshold voltage U is updated multiplied by being used as after b%
Threshold voltage；Wherein b% is pre-set percentage, and b is less than 100.
A kind of computer readable storage medium, is stored thereon with computer program, realization when which is executed by processor
Following steps:
Step 1, obtain a sampling timeframe in key signal time domain waveform sampled signal；The time domain waveform is adopted
Sample signal include each sampling time point time and corresponding key signal voltage value；
Step 2, by each voltage value of key signal by from small to large or descending order arrange, formed one sequence after number
Group, and the element numerical value corresponding compared with a predeterminated position of big end of numerical value in array is chosen as threshold voltage；
Step 3 determines the corresponding moment point of each key phase pulse signal in key signal according to the threshold voltage；
Step 4 carries out revolving speed calculating according to the corresponding moment point of each key phase pulse signal, obtains a revolving speed sequence；
Step 5 judges that key signal is lost with the presence or absence of the corresponding moment point of key phase pulse signal according to the revolving speed sequence
It loses；
Step 6, when being lost there are the corresponding moment point of key phase pulse signal, reduced with a pre-set threshold voltage
Threshold voltage described in policy update, and return to step 3；
Step 7, when being lost there is no the corresponding moment point of key phase pulse signal, determine that the revolving speed sequence is corresponding each
The corresponding moment point of key phase pulse signal is the set of all key phase pulse signal moment points in key signal.
A kind of computer equipment including memory, processor and is stored in the meter that storage is upper and can run on a processor
Calculation machine program, the processor perform the steps of when executing described program
Step 1, obtain a sampling timeframe in key signal time domain waveform sampled signal；The time domain waveform is adopted
Sample signal include each sampling time point time and corresponding key signal voltage value；
Step 2, by each voltage value of key signal by from small to large or descending order arrange, formed one sequence after number
Group, and the element numerical value corresponding compared with a predeterminated position of big end of numerical value in array is chosen as threshold voltage；
Step 3 determines the corresponding moment point of each key phase pulse signal in key signal according to the threshold voltage；
Step 4 carries out revolving speed calculating according to the corresponding moment point of each key phase pulse signal, obtains a revolving speed sequence；
Step 5 judges that key signal is lost with the presence or absence of the corresponding moment point of key phase pulse signal according to the revolving speed sequence
It loses；
Step 6, when being lost there are the corresponding moment point of key phase pulse signal, reduced with a pre-set threshold voltage
Threshold voltage described in policy update, and return to step 3；
Step 7, when being lost there is no the corresponding moment point of key phase pulse signal, determine that the revolving speed sequence is corresponding each
The corresponding moment point of key phase pulse signal is the set of all key phase pulse signal moment points in key signal.
The key phase pulse signal monitoring method and device of a kind of rotating machinery provided in an embodiment of the present invention obtain one first
The time domain waveform sampled signal of key signal in sampling timeframe；The time domain waveform sampled signal includes each sampling time point
Time and corresponding key signal voltage value；Each voltage value of key signal is pressed from small to large later or descending order is arranged
Column, the array after forming a sequence, and the element numerical value corresponding compared with a predeterminated position of big end of numerical value in array is chosen as threshold
Threshold voltage；The corresponding moment point of each key phase pulse signal in key signal is determined according to the threshold voltage；According to each key phase
The corresponding moment point of pulse signal carries out revolving speed calculating, obtains a revolving speed sequence, and judge that key is believed according to the revolving speed sequence
It number is lost with the presence or absence of the corresponding moment point of key phase pulse signal；When being lost there are the corresponding moment point of key phase pulse signal,
Reduce threshold voltage described in policy update with a pre-set threshold voltage, each key phase in key signal is determined before returning
The step of pulse signal corresponding moment point, until there is no the corresponding moment points of key phase pulse signal to lose.Key is being not present
When the corresponding moment point of phase pulse signal is lost, the corresponding moment point of the corresponding each key phase pulse signal of the revolving speed sequence is determined
For the set of key phase pulse signal moment points all in key signal.As it can be seen that the embodiment of the present invention can be according to key phase pulse signal
The loss situation of corresponding moment point, gradually updates threshold voltage, until losing there is no the corresponding moment point of key phase pulse signal
It loses, so as to the key phase pulse signal of accurate measurements rotating machinery, and accurately determines its corresponding moment point.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is the point layout schematic diagram of a scenario of monitoring key phase pulse signal in the prior art；
Fig. 2 is the schematic diagram of the pulse of key phase and threshold voltage in the prior art；
Fig. 3 is certain compressor emergency shutdown process key phase pulse temporal waveform diagram in the prior art；
Fig. 4 is a kind of flow chart of the key phase pulse signal monitoring method of rotating machinery provided in an embodiment of the present invention；
Fig. 5 is the time domain waveform sampled signal of the key signal in the embodiment of the present invention in sampling timeframe, by each key
The size of phase signals voltage value be arranged in order after signal and strong phase signals voltage probability density distribution situation signal
Figure；
Fig. 6 is the rotation speed change curve synoptic diagram in the embodiment of the present invention；
Fig. 7 is a kind of structural representation of the key phase pulse signal monitoring device of rotating machinery provided in an embodiment of the present invention
Figure.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
During realizing the embodiment of the present invention, inventor's discovery has in the following way in the prior art to monitor key
Phase pulse signal:
As shown in Figure 1, arranging that (current vortex displacement sensing can be used in a key phase block 102 on the big axis 101 of rotating machinery
Device) and one be used to measure the key phase eddy current displacement sensor 103 of key phase pulse signal, then arrange that two are used to measure big axis
The X of radial vibration is to eddy current displacement sensor 104 and Y-direction eddy current displacement sensor 105.In this way, in the big of rotating machinery
When axis 101 rotates, it will drive key phase block 102 and rotated.Key phase block 102 is sensed by key phase current vortex displacement during rotation
Device 103, X are sensed to eddy current displacement sensor 104 and Y-direction eddy current displacement sensor 105, each sensor and key phase block
102 distance and output voltage signal is linear, when the two apart from it is larger when, generally export larger value of negative voltage,
When distance is smaller, the voltage compared with fractional value is exported.So when the key phase block 102 on big axis 101 is sensed with key phase current vortex displacement
When the eddy current probe face of device 103, distance becomes smaller suddenly, to generate voltage jump, that is, generates voltage pulse signal, as key
Phase pulse signal.
Need to preset a fixed threshold value under normal circumstances, when key phase pulse signal voltage value is greater than the threshold value
When, it is believed that the moment is that key phase pulse pair is answered time point, as shown in Figure 2.Key phase threshold voltage is set as 7V, works as key signal
To get to a key phase pulse when voltage value is greater than 7V.
However, for rotating machinery transient process (from a kind of steady state condition to the converted of another steady state condition
Journey), typically such as startup-shutdown process, removal of load process, the big axis of rotating machinery can deviate in bearing shell to some extent back and forth
The heart, so as to cause measurement obtain key phase pulse voltage when it is big when it is small, as shown in Figure 3.According to fixed key phase voltage threshold value,
Such as it is set as 5V (dotted line position in Fig. 3), it is likely that can lost part key phase pulse time point (i.e. key of the loss less than 5V
Point at the time of phase pulse signal), to cause subsequent tachometric survey inaccuracy and be unable to vibrate in accurate judgement transient process
The situation of change of throw phase.
In order to overcome the above problem, as shown in figure 4, the embodiment of the present invention provides a kind of key phase pulse signal of rotating machinery
Monitoring method, comprising:
Step 1, obtain a sampling timeframe in key signal time domain waveform sampled signal；The time domain waveform is adopted
Sample signal include each sampling time point time and corresponding key signal voltage value.
Step 2, by each voltage value of key signal by from small to large or descending order arrange, formed one sequence after number
Group, and the element numerical value corresponding compared with a predeterminated position of big end of numerical value in array is chosen as threshold voltage.
Step 3 determines the corresponding moment point of each key phase pulse signal in key signal according to the threshold voltage.
Step 4 carries out revolving speed calculating according to the corresponding moment point of each key phase pulse signal, obtains a revolving speed sequence.
Step 5 judges that key signal is lost with the presence or absence of the corresponding moment point of key phase pulse signal according to the revolving speed sequence
It loses.
Step 6, when being lost there are the corresponding moment point of key phase pulse signal, reduced with a pre-set threshold voltage
Threshold voltage described in policy update.
3 are returned to step after step 6.
Step 7, when being lost there is no the corresponding moment point of key phase pulse signal, determine that the revolving speed sequence is corresponding each
The corresponding moment point of key phase pulse signal is the set of all key phase pulse signal moment points in key signal.
A kind of key phase pulse signal monitoring method of rotating machinery provided in an embodiment of the present invention can be believed according to key phase pulse
The loss situation of number corresponding moment point, gradually updates threshold voltage, until the corresponding moment point of key phase pulse signal is not present
It loses, so as to the key phase pulse signal of accurate measurements rotating machinery, and accurately determines its corresponding moment point.
Above-mentioned step 2 presses each voltage value of key signal from small to large or descending order arranges, and forms a sequence
Array afterwards, and the element numerical value corresponding compared with a predeterminated position of big end of numerical value in array is chosen as threshold voltage, specifically may be used
To realize in the following way:
Each voltage value of key signal is pressed from small to large or descending order arranges, the array after forming a sequence；
The small end of numerical value chooses the corresponding element numerical value in a preset percentage position as threshold to compared with big end from array
Threshold voltage.
For example, in array after sequence, from the small end of key signal voltage value to the strong phase of 99% position compared with big end
Signal voltage value is as threshold voltage.
And above-mentioned step 3 is at the time of determine that each key phase pulse signal in key signal corresponds to according to the threshold voltage
Point can specifically be realized in the following way:
For example, key signal voltage value x (i) corresponding for a sampling time point i can be used such as under type, and it is other
Identical mode can also be used in the determination of the corresponding moment point of each key phase pulse signal, will not enumerate and repeats herein:
It obtains the corresponding key signal voltage value x (i) of a sampling time point i and its previous sampling time point i-1 is corresponding
Key signal voltage value x (i-1) and the corresponding key signal voltage value x (i+1) of its latter sampling time point i+1.
It is greater than x (i-1) and x (i+1) in x (i), and when x (i) is more than or equal to the threshold voltage, by i pairs of sampling time point
The key signal answered is as a key phase pulse signal, using sampling time point i as the key phase pulse signal pair at sampling time point i
Point at the time of answering.
Specifically, carrying out revolving speed calculating according to the corresponding moment point of each key phase pulse signal described in above-mentioned step 4, obtain
To a revolving speed sequence, can realize in the following way:
According to formula:Determine the revolving speed v (j) of the corresponding moment point of each key phase pulse signal, shape
At a revolving speed sequence；Wherein, v (j) indicates the revolving speed of the corresponding moment point of j-th of key phase pulse signal；T (j) indicates j-th of key
The corresponding moment point of phase pulse signal；T (j+1) indicates the corresponding moment point of+1 key phase pulse signal of jth.
Judge that key signal is corresponding with the presence or absence of key phase pulse signal according to the revolving speed sequence described in above-mentioned steps 5
Moment point is lost, and under type such as specifically can be used and realize:
The revolving speed v (j) of the corresponding moment point of key phase pulse signal to be judged, and and v are obtained in the revolving speed sequence
(j) the revolving speed v (j-1) and v (j+1) of the adjacent corresponding moment point of key phase pulse signal.
?When, determining key signal, there are the corresponding moment points of key phase pulse signal
It loses；The a% is pre-set percentage threshold.Such as a% can be 70%, 75%, 80% equal percentage.Due to rotation
It makes a connection in tool, there is no the mutation of speed for normal velocity variations, andWhen, explanation
Speed is mutated, then may determine that the corresponding moment point of key phase pulse signal to be judged is lost.
Specifically, being set in advance when being lost there are the corresponding moment point of key phase pulse signal with one described in above-mentioned steps 6
The threshold voltage set reduces threshold voltage described in policy update, and under type such as specifically can be used and realize:
It is when being lost there are the corresponding moment point of key phase pulse signal, threshold voltage U is updated multiplied by being used as after b%
Threshold voltage；Wherein b% is pre-set percentage, and b is less than 100, such as b can be 80.
Illustrate the technical effect of the embodiment of the present invention with one group of specific data instance below:
For example, the time domain waveform sampled signal of the key signal in a sampling timeframe, by each key signal voltage value
Size be arranged in order after signal and strong phase signals voltage probability density distribution situation respectively as Fig. 5 upper, middle and lower three
Shown in part:
As shown in Figure 5, there is fluctuation in key phase pulse corresponding voltage, and the key signal voltage value overwhelming majority is distributed in -0.14V
Within the scope of~0.07V, segment pulse is mainly distributed within the scope of 5.4V~5.6V, and therefore, threshold voltage should be in the rectangle in Fig. 5
Value in frame.After counting more key phase pulse voltage numeric distribution, 99% after key signal is arranged by ascending order can be chosen
Array length corresponding element numerical value position is as threshold voltage.After answering the moment by this threshold voltage stat key phase pulse pair, then
Speed curves are calculated, if the mean value of certain adjacent two o'clock revolving speed of point rotating ratio is small by 30% or more, then it is assumed that exist and lose the pulse of key phase
The case where, at this point, by threshold voltage multiplied by 0.8 as new threshold voltage, then count and turn between key phase pulse pair is seasonable
Speed calculates, then carries out revolving speed judgement, if having not been met requirement, continues new threshold voltage multiplied by 0.8 as new threshold value
Voltage, then carry out key phase pulse statistics and tachometer.So circulation, until there is no lose key phase pulse situation.It then obtains most
Whole key phase burst length point statistics set.
For example, being 0.6371V according to the threshold voltage that above-mentioned steps 2 obtain.Later, pass through the threshold voltage determination key phase
The corresponding moment point of each key phase pulse signal in signal amounts to 28, matches with key phase pulse number in Fig. 5 with the time,
Be respectively as follows: 0.0648,0.2133,0.3633,0.5148,0.6680,0.8227,0.9781,1.1359,1.2961,1.4570,
1.6203、1.7852、1.9516、2.1195、2.2891、2.4609、2.6344、2.8094、2.9859、3.1641、3.3438、
3.5242,3.7055,3.8883,4.0719,4.2563,4.4406,4.6258.Later, corresponding according to each key phase pulse signal
At the time of point carries out tachometer calculation, obtained speed curves as shown in fig. 6, the speed curves it is coherent and without the situation that becomes smaller suddenly.
A kind of key phase pulse signal monitoring method of rotating machinery provided in an embodiment of the present invention can be believed according to key phase pulse
The loss situation of number corresponding moment point, gradually updates threshold voltage, until the corresponding moment point of key phase pulse signal is not present
It loses, so as to the key phase pulse signal of accurate measurements rotating machinery, and accurately determines its corresponding moment point.To for more
The situation of change for accurately understanding vibration throw phase provides precondition and grasps the situation of change of revolving speed.
Corresponding to above-mentioned embodiment of the method, as shown in fig. 7, the embodiment of the present invention provides a kind of key phase arteries and veins of rotating machinery
Rush signal monitoring device, comprising:
Time domain waveform sampled signal acquiring unit 21, for obtaining the time domain wave of the key signal in a sampling timeframe
Shape sampled signal；The time domain waveform sampled signal include each sampling time point time and corresponding key signal voltage value.
Threshold voltage determination unit 22 is used to press each voltage value of key signal from small to large or descending order is arranged
Column, the array after forming a sequence, and the element numerical value corresponding compared with a predeterminated position of big end of numerical value in array is chosen as threshold
Threshold voltage.
Key phase pulse signal moment point determination unit 23, for determining each key in key signal according to the threshold voltage
The corresponding moment point of phase pulse signal.
Speed calculation unit 24 obtains one for carrying out revolving speed calculating according to the corresponding moment point of each key phase pulse signal
Revolving speed sequence.
Judging unit 25 is lost, for judging key signal with the presence or absence of key phase pulse signal pair according to the revolving speed sequence
Point is lost at the time of answering.
Threshold voltage updating unit 26, for when being lost there are the corresponding moment point of key phase pulse signal, in advance with one
The threshold voltage of setting reduces threshold voltage described in policy update；Updated threshold voltage is formed in threshold voltage updating unit
Afterwards, return key phase pulse signal moment point determination unit 23.
As a result determination unit 27, for determining described turn when losing there is no the corresponding moment point of key phase pulse signal
The corresponding moment point of the corresponding each key phase pulse signal of fast sequence is the collection of all key phase pulse signal moment points in key signal
It closes.
In addition, the threshold voltage determination unit 22, is specifically used for:
Each voltage value of key signal is pressed from small to large or descending order arranges, the array after forming a sequence；
The small end of numerical value chooses the corresponding element numerical value in a preset percentage position as threshold to compared with big end from array
Threshold voltage.
In addition, the key phase pulse signal moment point determination unit 23, is specifically used for:
It obtains the corresponding key signal voltage value x (i) of a sampling time point i and its previous sampling time point i-1 is corresponding
Key signal voltage value x (i-1) and the corresponding key signal voltage value x (i+1) of its latter sampling time point i+1.
It is greater than x (i-1) and x (i+1) in x (i), and when x (i) is more than or equal to the threshold voltage, by i pairs of sampling time point
The key signal answered is as a key phase pulse signal, using sampling time point i as the key phase pulse signal pair at sampling time point i
Point at the time of answering.
In addition, the speed calculation unit 24, is specifically used for:
According to formula:Determine the revolving speed v (j) of the corresponding moment point of each key phase pulse signal, shape
At a revolving speed sequence；Wherein, v (j) indicates the revolving speed of the corresponding moment point of j-th of key phase pulse signal；T (j) indicates j-th of key
The corresponding moment point of phase pulse signal；T (j+1) indicates the corresponding moment point of+1 key phase pulse signal of jth.
The loss judging unit 25, is specifically used for:
The revolving speed v (j) of the corresponding moment point of key phase pulse signal to be judged, and and v are obtained in the revolving speed sequence
(j) the revolving speed v (j-1) and v (j+1) of the adjacent corresponding moment point of key phase pulse signal.
?When, determining key signal, there are the corresponding moment points of key phase pulse signal
It loses；The a% is pre-set percentage threshold.
In addition, the threshold voltage updating unit 26, is specifically used for:
It is when being lost there are the corresponding moment point of key phase pulse signal, threshold voltage U is updated multiplied by being used as after b%
Threshold voltage；Wherein b% is pre-set percentage, and b is less than 100.
A kind of key phase pulse signal monitoring device of rotating machinery provided in an embodiment of the present invention can be believed according to key phase pulse
The loss situation of number corresponding moment point, gradually updates threshold voltage, until the corresponding moment point of key phase pulse signal is not present
It loses, so as to the key phase pulse signal of accurate measurements rotating machinery, and accurately determines its corresponding moment point.To for more
The situation of change for accurately understanding vibration throw phase provides precondition and grasps the situation of change of revolving speed.
In addition, the embodiment of the present invention also provides a kind of computer readable storage medium, it is stored thereon with computer program, it should
It is performed the steps of when program is executed by processor
Step 1, obtain a sampling timeframe in key signal time domain waveform sampled signal；The time domain waveform is adopted
Sample signal include each sampling time point time and corresponding key signal voltage value；
Step 2, by each voltage value of key signal by from small to large or descending order arrange, formed one sequence after number
Group, and the element numerical value corresponding compared with a predeterminated position of big end of numerical value in array is chosen as threshold voltage；
Step 3 determines the corresponding moment point of each key phase pulse signal in key signal according to the threshold voltage；
Step 4 carries out revolving speed calculating according to the corresponding moment point of each key phase pulse signal, obtains a revolving speed sequence；
Step 5 judges that key signal is lost with the presence or absence of the corresponding moment point of key phase pulse signal according to the revolving speed sequence
It loses；
Step 6, when being lost there are the corresponding moment point of key phase pulse signal, reduced with a pre-set threshold voltage
Threshold voltage described in policy update, and return to step 3；
Step 7, when being lost there is no the corresponding moment point of key phase pulse signal, determine that the revolving speed sequence is corresponding each
The corresponding moment point of key phase pulse signal is the set of all key phase pulse signal moment points in key signal.
In addition, the embodiment of the present invention also provides a kind of computer equipment, including memory, processor and it is stored in storage
And the computer program that can be run on a processor, the processor perform the steps of when executing described program
Step 1, obtain a sampling timeframe in key signal time domain waveform sampled signal；The time domain waveform is adopted
Sample signal include each sampling time point time and corresponding key signal voltage value；
Step 2, by each voltage value of key signal by from small to large or descending order arrange, formed one sequence after number
Group, and the element numerical value corresponding compared with a predeterminated position of big end of numerical value in array is chosen as threshold voltage；
Step 3 determines the corresponding moment point of each key phase pulse signal in key signal according to the threshold voltage；
Step 4 carries out revolving speed calculating according to the corresponding moment point of each key phase pulse signal, obtains a revolving speed sequence；
Step 5 judges that key signal is lost with the presence or absence of the corresponding moment point of key phase pulse signal according to the revolving speed sequence
It loses；
Step 6, when being lost there are the corresponding moment point of key phase pulse signal, reduced with a pre-set threshold voltage
Threshold voltage described in policy update, and return to step 3；
Step 7, when being lost there is no the corresponding moment point of key phase pulse signal, determine that the revolving speed sequence is corresponding each
The corresponding moment point of key phase pulse signal is the set of all key phase pulse signal moment points in key signal.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Specific embodiment is applied in the present invention, and principle and implementation of the present invention are described, above embodiments
Explanation be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art,
According to the thought of the present invention, there will be changes in the specific implementation manner and application range, in conclusion in this specification
Appearance should not be construed as limiting the invention.
Claims (12)
1. a kind of key phase pulse signal monitoring method of rotating machinery characterized by comprising
Step 1, obtain a sampling timeframe in key signal time domain waveform sampled signal；The time domain waveform sampling letter
Number include each sampling time point time and corresponding key signal voltage value；
Step 2, by each voltage value of key signal by from small to large or descending order arrange, formed one sequence after array,
And the element numerical value corresponding compared with a predeterminated position of big end of numerical value in array is chosen as threshold voltage；
Step 3 determines the corresponding moment point of each key phase pulse signal in key signal according to the threshold voltage；
Step 4 carries out revolving speed calculating according to the corresponding moment point of each key phase pulse signal, obtains a revolving speed sequence；
Step 5 judges that key signal is lost with the presence or absence of the corresponding moment point of key phase pulse signal according to the revolving speed sequence；
Step 6, when being lost there are the corresponding moment point of key phase pulse signal, strategy is reduced with a pre-set threshold voltage
The threshold voltage is updated, and returns to step 3；
Step 7, when being lost there is no the corresponding moment point of key phase pulse signal, determine the corresponding each key phase of the revolving speed sequence
The corresponding moment point of pulse signal is the set of all key phase pulse signal moment points in key signal.
2. the method according to claim 1, wherein by each voltage value of key signal by from small to large or from greatly to
Small sequence arrangement, the array after forming a sequence, and choose the first prime number corresponding compared with a predeterminated position of big end of numerical value in array
Value is used as threshold voltage, comprising:
Each voltage value of key signal is pressed from small to large or descending order arranges, the array after forming a sequence；
The small end of numerical value chooses the corresponding element numerical value in a preset percentage position as threshold value electricity to compared with big end from array
Pressure.
3. the method according to claim 1, wherein determining each key in key signal according to the threshold voltage
The corresponding moment point of phase pulse signal, comprising:
Obtain the corresponding key signal voltage value x (i) of a sampling time point i and the corresponding key of its previous sampling time point i-1
Phase signals voltage value x (i-1) and the corresponding key signal voltage value x (i+1) of its latter sampling time point i+1；
It is greater than x (i-1) and x (i+1) in x (i), and when x (i) is more than or equal to the threshold voltage, sampling time point i is corresponding
Key signal is corresponding as the key phase pulse signal at sampling time point i using sampling time point i as a key phase pulse signal
Moment point.
4. the method according to claim 1, wherein described click through according to each key phase pulse signal corresponding moment
Row revolving speed calculates, and obtains a revolving speed sequence, comprising:
According to formula:It determines the revolving speed v (j) of the corresponding moment point of each key phase pulse signal, forms one
Revolving speed sequence；Wherein, v (j) indicates the revolving speed of the corresponding moment point of j-th of key phase pulse signal；T (j) indicates j-th of key phase arteries and veins
Rush the corresponding moment point of signal；T (j+1) indicates the corresponding moment point of+1 key phase pulse signal of jth；
It is described to judge that key signal is lost with the presence or absence of the corresponding moment point of key phase pulse signal according to the revolving speed sequence, packet
It includes:
Obtain the revolving speed v (j) of the corresponding moment point of key phase pulse signal to be judged in the revolving speed sequence, and with v (j) phase
The revolving speed v (j-1) and v (j+1) of the adjacent corresponding moment point of key phase pulse signal；
?When, determining key signal, there are the corresponding moment points of key phase pulse signal to lose；
The a% is pre-set percentage threshold.
5. the method according to claim 1, wherein described there are the corresponding moment points of key phase pulse signal to lose
When mistake, threshold voltage described in policy update is reduced with a pre-set threshold voltage, comprising:
When being lost there are the corresponding moment point of key phase pulse signal, by threshold voltage U multiplied by being used as updated threshold value after b%
Voltage；Wherein b% is pre-set percentage, and b is less than 100.
6. a kind of key phase pulse signal monitoring device of rotating machinery characterized by comprising
Time domain waveform sampled signal acquiring unit, the time domain waveform for obtaining the key signal in a sampling timeframe sample
Signal；The time domain waveform sampled signal include each sampling time point time and corresponding key signal voltage value；
Threshold voltage determination unit is used to press each voltage value of key signal from small to large or descending order arranges, formed
Array after one sequence, and the element numerical value corresponding compared with a predeterminated position of big end of numerical value in array is chosen as threshold voltage；
Key phase pulse signal moment point determination unit, for determining each key phase pulse in key signal according to the threshold voltage
The corresponding moment point of signal；
Speed calculation unit obtains a revolving speed sequence for carrying out revolving speed calculating according to the corresponding moment point of each key phase pulse signal
Column；
Judging unit is lost, when for judging that key signal is corresponding with the presence or absence of key phase pulse signal according to the revolving speed sequence
Punctum is lost；
Threshold voltage updating unit, it is pre-set with one for when being lost there are the corresponding moment point of key phase pulse signal
Threshold voltage reduces threshold voltage described in policy update；After threshold voltage updating unit forms updated threshold voltage, return
Return key phase pulse signal moment point determination unit；
As a result determination unit, for determining the revolving speed sequence when losing there is no the corresponding moment point of key phase pulse signal
The corresponding moment point of corresponding each key phase pulse signal is the set of all key phase pulse signal moment points in key signal.
7. device according to claim 6, which is characterized in that the threshold voltage determination unit is specifically used for:
Each voltage value of key signal is pressed from small to large or descending order arranges, the array after forming a sequence；
The small end of numerical value chooses the corresponding element numerical value in a preset percentage position as threshold value electricity to compared with big end from array
Pressure.
8. device according to claim 6, which is characterized in that the key phase pulse signal moment point determination unit, specifically
For:
Obtain the corresponding key signal voltage value x (i) of a sampling time point i and the corresponding key of its previous sampling time point i-1
Phase signals voltage value x (i-1) and the corresponding key signal voltage value x (i+1) of its latter sampling time point i+1；
It is greater than x (i-1) and x (i+1) in x (i), and when x (i) is more than or equal to the threshold voltage, sampling time point i is corresponding
Key signal is corresponding as the key phase pulse signal at sampling time point i using sampling time point i as a key phase pulse signal
Moment point.
9. device according to claim 6, which is characterized in that the speed calculation unit is specifically used for:
According to formula:It determines the revolving speed v (j) of the corresponding moment point of each key phase pulse signal, forms one
Revolving speed sequence；Wherein, v (j) indicates the revolving speed of the corresponding moment point of j-th of key phase pulse signal；T (j) indicates j-th of key phase arteries and veins
Rush the corresponding moment point of signal；T (j+1) indicates the corresponding moment point of+1 key phase pulse signal of jth；
The loss judging unit, is specifically used for:
Obtain the revolving speed v (j) of the corresponding moment point of key phase pulse signal to be judged in the revolving speed sequence, and with v (j) phase
The revolving speed v (j-1) and v (j+1) of the adjacent corresponding moment point of key phase pulse signal；
?When, determining key signal, there are the corresponding moment points of key phase pulse signal to lose；
The a% is pre-set percentage threshold.
10. device according to claim 6, which is characterized in that the threshold voltage updating unit is specifically used for:
When being lost there are the corresponding moment point of key phase pulse signal, by threshold voltage U multiplied by being used as updated threshold value after b%
Voltage；Wherein b% is pre-set percentage, and b is less than 100.
11. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the program is by processor
It is performed the steps of when execution
Step 1, obtain a sampling timeframe in key signal time domain waveform sampled signal；The time domain waveform sampling letter
Number include each sampling time point time and corresponding key signal voltage value；
Step 2, by each voltage value of key signal by from small to large or descending order arrange, formed one sequence after array,
And the element numerical value corresponding compared with a predeterminated position of big end of numerical value in array is chosen as threshold voltage；
Step 3 determines the corresponding moment point of each key phase pulse signal in key signal according to the threshold voltage；
Step 4 carries out revolving speed calculating according to the corresponding moment point of each key phase pulse signal, obtains a revolving speed sequence；
Step 5 judges that key signal is lost with the presence or absence of the corresponding moment point of key phase pulse signal according to the revolving speed sequence；
Step 6, when being lost there are the corresponding moment point of key phase pulse signal, strategy is reduced with a pre-set threshold voltage
The threshold voltage is updated, and returns to step 3；
Step 7, when being lost there is no the corresponding moment point of key phase pulse signal, determine the corresponding each key phase of the revolving speed sequence
The corresponding moment point of pulse signal is the set of all key phase pulse signal moment points in key signal.
12. a kind of computer equipment including memory, processor and is stored in the calculating that storage is upper and can run on a processor
Machine program, which is characterized in that the processor performs the steps of when executing described program
Step 1, obtain a sampling timeframe in key signal time domain waveform sampled signal；The time domain waveform sampling letter
Number include each sampling time point time and corresponding key signal voltage value；
Step 2, by each voltage value of key signal by from small to large or descending order arrange, formed one sequence after array,
And the element numerical value corresponding compared with a predeterminated position of big end of numerical value in array is chosen as threshold voltage；
Step 3 determines the corresponding moment point of each key phase pulse signal in key signal according to the threshold voltage；
Step 4 carries out revolving speed calculating according to the corresponding moment point of each key phase pulse signal, obtains a revolving speed sequence；
Step 5 judges that key signal is lost with the presence or absence of the corresponding moment point of key phase pulse signal according to the revolving speed sequence；
Step 6, when being lost there are the corresponding moment point of key phase pulse signal, strategy is reduced with a pre-set threshold voltage
The threshold voltage is updated, and returns to step 3；
Step 7, when being lost there is no the corresponding moment point of key phase pulse signal, determine the corresponding each key phase of the revolving speed sequence
The corresponding moment point of pulse signal is the set of all key phase pulse signal moment points in key signal.
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