CN107505497A - A kind of passive magnetoelectricity signals of rotational speed sensor peak-to-peak value ime-domain measuring method - Google Patents
A kind of passive magnetoelectricity signals of rotational speed sensor peak-to-peak value ime-domain measuring method Download PDFInfo
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- CN107505497A CN107505497A CN201710606144.5A CN201710606144A CN107505497A CN 107505497 A CN107505497 A CN 107505497A CN 201710606144 A CN201710606144 A CN 201710606144A CN 107505497 A CN107505497 A CN 107505497A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/04—Measuring peak values or amplitude or envelope of ac or of pulses
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/2506—Arrangements for conditioning or analysing measured signals, e.g. for indicating peak values ; Details concerning sampling, digitizing or waveform capturing
- G01R19/2509—Details concerning sampling, digitizing or waveform capturing
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- Transmission And Conversion Of Sensor Element Output (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The present invention relates to a kind of passive magnetoelectricity signals of rotational speed sensor peak-to-peak value ime-domain measuring method, whether the half period waveform that this method detects in the periodic signal of passive magnetic power rotation speed sensor output first is complete, then the measurement of signal peak-to-peak value complete cycle is realized using a complete semi-period wave graphic data, the periodic signal is time domain discrete sampled signal.Compared with prior art, the present invention can obtain the more authentic and valid peak-to-peak value numerical value of periodic signal, have the advantages that calculating speed is fast, it is accurate to judge.
Description
Technical field
The present invention relates to a kind of peak-to-peak value ime-domain measuring method, more particularly, to a kind of passive magnetoelectricity signals of rotational speed sensor
Peak-to-peak value ime-domain measuring method.
Background technology
Magnetic power rotation speed sensor is widely used in vibration measurement field, and it has the characteristics that：Passive output, without outer
Power up；Two-wire system exports, easy-to-connect；Sensor output signal is similar to sine wave signal；Reliability is high, is used in severe field
Institute.The amplitude (peak-to-peak value) of sinusoidal wave signal characterizes the size that sensor gathers physical quantity.The peak of existing periodic signal
Peak value ime-domain measuring method, generally with the maximum and minimum value of the signal waveform collected in a cycle, calculate its difference
As peak-to-peak value., may be in upper half periodic waveform due to the influence of actual installation position after sensor mounting location determines
Or obvious distorted waveform occurs in the lower half cycle, in the case of waveform asymmetry, transient pulse in the signal particularly be present
In the case of interference or spike/trough interference signal, directly peak-to-peak value result and reason are calculated using signal maximum and minimum value
Think that waveform resultant error is larger, it is impossible to reflect the actual peak-to-peak value of sinusoidal wave periodic signal, have influence on the accurate of measurement result
Property.
The content of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of high passive of precision
Magnetic power rotation speed sensor signal peak-to-peak value ime-domain measuring method.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of passive magnetoelectricity signals of rotational speed sensor peak-to-peak value ime-domain measuring method, this method detect passive magnetoelectricity and turned first
Whether the half period waveform in the periodic signal of fast sensor output is complete, then using a complete semi-period wave figurate number factually
The measurement of existing signal peak-to-peak value complete cycle, the periodic signal is time domain discrete sampled signal.
Half period waveform in the periodic signal is extracted using zero-crossing examination method, is obtained positive half period signal and is born
Semiperiodic signal.
Before performing the zero-crossing examination method, low-pass filtering treatment is carried out to the periodic signal.
Before performing the zero-crossing examination method, DC component treatment is carried out to the periodic signal.
When whether detection half period waveform is complete, the positive half period signal and negative half-cycle that are extracted in a cycle are believed respectively
Number detected, there is situations below：
A) positive half period signal and negative half-cycle signal are detected as completely, then signal complete cycle peak-to-peak value is positive half period
The difference of signal peak and negative half-cycle signal peak；
B) only positive half period signal detection is complete, then signal complete cycle peak-to-peak value is positive half period signal peak numerical value
Twice；
C) only negative half-cycle signal detection is complete, then signal complete cycle peak-to-peak value is positive half period signal peak absolute value
Twice；
D) positive half period signal and negative half-cycle signal are detected as imperfect, then give up current period.
Detection the half period waveform whether be specially completely：
Point-by-point calculus of differences is carried out to the time domain waveform sampled data of the half period waveform, record calculus of differences result surpasses
The number of predetermined threshold value is crossed, judges whether the number is less than preset times, if so, then judge that current half period waveform is complete,
If it is not, current half period waveform is then judged the semiperiodic signal of transient pulse interference or spike/trough signal to be present.
The preset times include 1 or 2.
The periodic signal includes sinusoidal wave sensor signal, sinusoidal simple signal and amplitude and changes gradual cycle letter
Number.
Compared with prior art, the present invention directly uses the time domain waveform data of sinusoidal wave periodic signal, judges complete
Semiperiodic signal waveform and asymmetric semiperiodic signal waveform, be calculated entirely using complete half cycle phase signal waveform data
The peak-to-peak value of periodic signal, calculating speed is fast, effectively eliminates when transient pulse interference or spike/trough interference be present
Information is judged by accident.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the present invention；
Fig. 2 is periodic signal schematic diagram to be measured in the present embodiment.
Embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to
Following embodiments.
The present embodiment provides a kind of passive magnetoelectricity signals of rotational speed sensor peak-to-peak value ime-domain measuring method, and this method is examined first
Whether the half period waveform surveyed in the periodic signal of passive magnetic power rotation speed sensor output is complete, then utilizes a complete half cycle
Phase Wave data realizes the measurement of signal peak-to-peak value complete cycle, and periodic signal is time domain discrete sampled signal.With sinusoidal wave week
Exemplified by phase signal, as shown in figure 1, this method specifically includes following steps：
S1, half period waveform is extracted using zero-crossing examination method, obtains positive half period signal and negative half-cycle signal.
If periodic signal includes random noise component, have influence on zero-crossing examination, then it is right before performing zero-crossing examination method
Periodic signal carries out low-pass filtering treatment.
When periodic signal includes DC component, before performing zero-crossing examination method, direct current point need to be carried out to periodic signal
Amount processing.
Zero-crossing examination method be directly using time domain waveform data judge the positive half period of sinusoidal wave periodic signal with
Negative half-cycle, the sequence of time-domain samples of signal is S [N], corresponding sampling time sequence t [N], wherein N=1, and 2,3 ... be just whole
Number, S [N-1], S [N] in Wave data sequence are checked, as S [N-1]<0 and S [N]>When=0, judge that positive half period originated
Zero point falls between t [N-1] and t [N], and more accurate numerical value is obtained using interpolation arithmetic, as S [N-1]>0 and S [N]<=0
When, judging that negative half-cycle starting zero crossing falls between t [N-1] and t [N], more accurate numerical value is obtained using interpolation arithmetic, and two
Time difference meter between individual adjacent positive half period starting zero crossing or between two adjacent negative half-cycle starting zero crossings
Calculation obtains the cycle of periodic signal.The zero-crossing examination method that the present invention uses has the advantages of simple computational methods, rapidity.
S2, whether detection half period waveform is complete, respectively to the positive half period and negative half-cycle of sinusoidal wave periodic signal
The time domain waveform sampled data of signal carries out point-by-point calculus of differences, Sd [N]=S [N]-S [N-1], Difference Calculation result Sd [N] with
Predetermined threshold value compares, and judges whether to exceed and presets positive threshold value or negative threshold value, (limited whole when being less than preset times more than number
Number, such as 1 or 2), are determined as complete half cycle phase signal, are otherwise determined to have transient pulse interference or spike/trough signal
Semiperiodic signal, as shown in Figure 2.
S3, the measurement of signal peak-to-peak value complete cycle is realized using a complete semi-period wave graphic data, when the complete half cycle phase
When signal determining is positive half period signal, peak value is taken as the maximum of positive half period signal waveform data, believes when the complete half cycle phase
When number being determined as negative half-cycle signal, peak value is taken as the minimum value of negative half-cycle signal waveform data.The measurement of peak-to-peak value has
Situations below：
A) positive half period signal and negative half-cycle signal are detected as completely, then signal complete cycle peak-to-peak value is positive half period
The difference of signal peak and negative half-cycle signal peak；
B) only positive half period signal detection is complete, then signal complete cycle peak-to-peak value is positive half period signal peak numerical value
Twice；
C) only negative half-cycle signal detection is complete, then signal complete cycle peak-to-peak value is positive half period signal peak absolute value
Twice；
D) positive half period signal and negative half-cycle signal are detected as imperfect, then give up current period.
The above method is also applied for sinusoidal simple signal or other amplitudes change gradual periodic signal.
Preferred embodiment of the invention described in detail above.It should be appreciated that one of ordinary skill in the art without
Creative work can is needed to make many modifications and variations according to the design of the present invention.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical scheme, all should be in the protection domain being defined in the patent claims.
Claims (8)
1. a kind of passive magnetoelectricity signals of rotational speed sensor peak-to-peak value ime-domain measuring method, it is characterised in that this method detects first
Whether the half period waveform in the periodic signal of passive magnetic power rotation speed sensor output is complete, then utilizes a complete half period
Wave data realizes the measurement of signal peak-to-peak value complete cycle, and the periodic signal is time domain discrete sampled signal.
2. passive magnetoelectricity signals of rotational speed sensor peak-to-peak value ime-domain measuring method according to claim 1, it is characterised in that
Half period waveform in the periodic signal is extracted using zero-crossing examination method, obtains positive half period signal and negative half-cycle letter
Number.
3. passive magnetoelectricity signals of rotational speed sensor peak-to-peak value ime-domain measuring method according to claim 2, it is characterised in that
Before performing the zero-crossing examination method, low-pass filtering treatment is carried out to the periodic signal.
4. passive magnetoelectricity signals of rotational speed sensor peak-to-peak value ime-domain measuring method according to claim 2, it is characterised in that
Before performing the zero-crossing examination method, DC component treatment is carried out to the periodic signal.
5. passive magnetoelectricity signals of rotational speed sensor peak-to-peak value ime-domain measuring method according to claim 2, it is characterised in that
When whether detection half period waveform is complete, the positive half period signal and negative half-cycle signal that are extracted in a cycle are examined respectively
Survey, there is situations below：
A) positive half period signal and negative half-cycle signal are detected as completely, then signal complete cycle peak-to-peak value is positive half period signal
The difference of peak value and negative half-cycle signal peak；
B) only positive half period signal detection is complete, then signal complete cycle peak-to-peak value is the two of positive half period signal peak numerical value
Times；
C) only negative half-cycle signal detection is complete, then signal complete cycle peak-to-peak value is the two of positive half period signal peak absolute value
Times；
D) positive half period signal and negative half-cycle signal are detected as imperfect, then give up current period.
6. passive magnetoelectricity signals of rotational speed sensor peak-to-peak value ime-domain measuring method according to claim 1, it is characterised in that
Detection the half period waveform whether be specially completely：
Point-by-point calculus of differences is carried out to the time domain waveform sampled data of the half period waveform, record calculus of differences result exceedes pre-
If the number of threshold value, judge whether the number is less than preset times, if so, then judge that current half period waveform is complete, if it is not,
Current half period waveform is then judged the semiperiodic signal of transient pulse interference or spike/trough signal to be present.
7. passive magnetoelectricity signals of rotational speed sensor peak-to-peak value ime-domain measuring method according to claim 4, it is characterised in that
The preset times include 1 or 2.
8. passive magnetoelectricity signals of rotational speed sensor peak-to-peak value ime-domain measuring method according to claim 1, it is characterised in that
The periodic signal includes sinusoidal wave sensor signal, sinusoidal simple signal and amplitude and changes gradual periodic signal.
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Cited By (5)
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| CN112504426A (en) * | 2020-11-20 | 2021-03-16 | 中国直升机设计研究所 | Peak search-based rotor blade vortex interference noise whole-period averaging method |
| CN113503882A (en) * | 2021-06-03 | 2021-10-15 | 北京自动化控制设备研究所 | Vehicle-mounted inertia/geomagnetic combined navigation method and device |
| CN114257102A (en) * | 2020-09-24 | 2022-03-29 | 苏州爱科赛博电源技术有限责任公司 | Double-sampling single-refreshing method based on three-phase two-level topological structure |
| CN114719731A (en) * | 2022-06-08 | 2022-07-08 | 中国航发四川燃气涡轮研究院 | Blade tip clearance peak-to-peak value extraction method and blade rotating speed calculation method and device |
| CN115824266A (en) * | 2023-01-04 | 2023-03-21 | 哈尔滨市科佳通用机电股份有限公司 | Signal processing method and device based on wheel sensor processing device |
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| CN114257102A (en) * | 2020-09-24 | 2022-03-29 | 苏州爱科赛博电源技术有限责任公司 | Double-sampling single-refreshing method based on three-phase two-level topological structure |
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| CN113503882A (en) * | 2021-06-03 | 2021-10-15 | 北京自动化控制设备研究所 | Vehicle-mounted inertia/geomagnetic combined navigation method and device |
| CN113503882B (en) * | 2021-06-03 | 2023-09-12 | 北京自动化控制设备研究所 | Vehicle-mounted inertial/geomagnetic integrated navigation method and device |
| CN114719731A (en) * | 2022-06-08 | 2022-07-08 | 中国航发四川燃气涡轮研究院 | Blade tip clearance peak-to-peak value extraction method and blade rotating speed calculation method and device |
| CN114719731B (en) * | 2022-06-08 | 2022-09-23 | 中国航发四川燃气涡轮研究院 | Blade tip clearance peak-to-peak value extraction method and blade rotating speed calculation method and device |
| CN115824266A (en) * | 2023-01-04 | 2023-03-21 | 哈尔滨市科佳通用机电股份有限公司 | Signal processing method and device based on wheel sensor processing device |
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