CN112986392B - Method and device for determining excitation frequency - Google Patents
Method and device for determining excitation frequency Download PDFInfo
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- CN112986392B CN112986392B CN202110218681.9A CN202110218681A CN112986392B CN 112986392 B CN112986392 B CN 112986392B CN 202110218681 A CN202110218681 A CN 202110218681A CN 112986392 B CN112986392 B CN 112986392B
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- 230000005284 excitation Effects 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 52
- 238000012545 processing Methods 0.000 claims abstract description 15
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- 238000004590 computer program Methods 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 description 32
- 239000010959 steel Substances 0.000 description 32
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- 238000005259 measurement Methods 0.000 description 4
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/11—Analysing solids by measuring attenuation of acoustic waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0028—Force sensors associated with force applying means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/34—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor
- G01N29/346—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor with amplitude characteristics, e.g. modulated signal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/01—Indexing codes associated with the measuring variable
- G01N2291/015—Attenuation, scattering
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
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- G01N2291/0234—Metals, e.g. steel
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Abstract
The application discloses a method and a device for determining excitation frequency. Wherein the method comprises the following steps: step A: acquiring a frequency range to which a current frequency band of a sensor belongs, wherein the sensor is used for detecting the tension of a pipeline to be detected; and (B) step (B): determining a plurality of reference frequencies in a frequency range; step C: processing the plurality of reference frequencies based on the random factor to obtain a plurality of random reference frequencies corresponding to the plurality of reference frequencies; step D: exciting the sensor by adopting a plurality of random reference frequencies, and acquiring the signal amplitude of a feedback signal generated by the sensor; step E: and E, updating the frequency range corresponding to the current frequency band according to the signal amplitude, repeating the steps A to E until the maximum signal amplitude in the current frequency band meets the preset condition, and determining the target reference frequency corresponding to the current frequency band as the excitation frequency. The application solves the technical problem that the excitation frequency cannot be accurately determined in the prior art.
Description
Technical Field
The application relates to the field of automatic control, in particular to a method and a device for determining excitation frequency.
Background
In the prior art, a worker can resonate the steel string by detecting excitation of an electromagnetic coil of the strain gauge, and then calculate tension applied to the steel string according to a frequency signal when the steel string resonates.
In the prior art, the following method is generally adopted to make the steel string resonate:
(1) A sweep frequency excitation method. In the sweep frequency excitation method, a continuously variable frequency signal is output through a strain gauge to excite the steel wire, and when the frequency of the frequency signal is close to the natural frequency of the steel wire, the steel wire can quickly reach a resonance state, so that reliable vibration starting is realized. After the steel wire vibrating wire is vibrated, the frequency of the induced electromotive force generated by the steel wire in the coil is the natural frequency of the steel wire. However, in this method, the natural frequency of the steel string is not known in advance, the frequency signal is required to be continuously output from the lower frequency limit to the upper frequency limit of the sensor, the time required for the signal generated by the sensor is long, the signal generated by the sensor is extremely short, the steel string is possibly excited, the frequency sweep is not completed, when the frequency sweep is completed and the signal is measured, the steel string is possibly stopped vibrating, and the measurement time is difficult to determine.
(2) And (5) a current method. In the current method, when the steel wire is excited, the steel wire of the vibrating wire strain gauge passes through current, the steel wire with the current is acted by Lorentz force in a magnetic field, the Lorentz force enables the steel wire to vibrate at the natural frequency of the steel wire, and meanwhile signals generated by vibration can be fed back to the steel wire again through a feedback circuit, so that the steel wire can vibrate continuously. However, in this method, the wire of the vibrating wire strain gauge needs to be subjected to current, and long-time energization causes the wire to generate heat, which is prone to aging of the wire, and the material characteristics change, thereby affecting the measurement accuracy.
(3) Batch excitation method. In the intermittent excitation method, relay actuation is controlled by a series of square wave signals. When the relay is closed, the coil of the sensor is connected with a power supply, and an electromagnet in the coil generates magnetic force which pulls the steel string to the coil and attracts the steel string; when the relay is powered off, the current disappears, and the coil releases the steel string. Through the pulling and releasing, the vibration of the steel string is realized. However, the circuit design corresponding to the method is complex, an electromagnetic relay with larger volume is used, and meanwhile, the relay has the defects of high power consumption, poor working reliability of mechanical contacts and short service life.
In view of the above problems, no effective solution has been proposed at present.
Disclosure of Invention
The embodiment of the application provides a method and a device for determining excitation frequency, which at least solve the technical problem that the excitation frequency cannot be accurately determined in the prior art.
According to an aspect of an embodiment of the present application, there is provided a method for determining an excitation frequency, including: step A: acquiring a frequency range to which a current frequency band of a sensor belongs, wherein the sensor is used for detecting the tension of a pipeline to be detected; and (B) step (B): determining a plurality of reference frequencies in a frequency range; step C: processing the plurality of reference frequencies based on the random factor to obtain a plurality of random reference frequencies corresponding to the plurality of reference frequencies; step D: exciting the sensor by adopting a plurality of random reference frequencies, and acquiring the signal amplitude of a feedback signal generated by the sensor; step E: and E, updating the frequency range corresponding to the current frequency band according to the signal amplitude, repeating the steps A to E until the maximum signal amplitude in the current frequency band meets the preset condition, and determining the target reference frequency corresponding to the current frequency band as the excitation frequency.
Further, the method for determining the excitation frequency further includes: before the frequency range of the current frequency band of the sensor is acquired, acquiring the sensitivity range corresponding to the sensor; determining the frequency division width according to the sensitivity range and the parameter information of the sensor; and dividing the range frequency range of the sensor into a plurality of equal-width frequency bands according to the frequency division width, wherein the current frequency band is any frequency band in the plurality of equal-width frequency bands.
Further, the method for determining the excitation frequency further includes: dividing a frequency range into a plurality of frequency bands; and setting the frequency at the dividing point of each frequency band as the corresponding reference frequency of each frequency band to obtain a plurality of reference frequencies.
Further, the method for determining the excitation frequency further includes: exciting the sensor with a plurality of random reference frequencies to generate feedback signals respectively corresponding to the plurality of reference frequencies; the signal amplitude of the feedback signal is obtained.
Further, the method for determining the excitation frequency further includes: obtaining the maximum signal amplitude to obtain the maximum signal amplitude; if the maximum signal amplitude is smaller than or equal to the preset amplitude, acquiring a reference frequency corresponding to the maximum signal amplitude; and updating the frequency range corresponding to the current frequency band according to the reference frequency pair corresponding to the maximum signal amplitude.
Further, the method for determining the excitation frequency further includes: if the maximum signal amplitude is larger than the preset amplitude, determining that the maximum signal amplitude in the current frequency band meets the preset condition.
Further, the method for determining the excitation frequency further includes: after determining that the target reference frequency corresponding to the current frequency band is the excitation frequency, collecting a resonance signal of the pipeline to be detected when resonating at the excitation frequency; and determining the tension of the pipeline to be tested according to the resonance signals.
According to another aspect of the embodiment of the present application, there is also provided an excitation frequency determining apparatus, including: the first acquisition module is used for acquiring a frequency range of a current frequency band of the sensor, wherein the sensor is used for detecting the tension of the pipeline to be detected; a determining module for determining a plurality of reference frequencies in a frequency range; the processing module is used for processing the plurality of reference frequencies based on the random factors to obtain a plurality of random reference frequencies corresponding to the plurality of reference frequencies; the second acquisition module is used for exciting the sensor by adopting a plurality of random reference frequencies and acquiring the signal amplitude of a feedback signal generated by the sensor; and the updating module is used for updating the frequency range corresponding to the current frequency band according to the signal amplitude, repeatedly executing the steps contained in the first acquisition module, the determining module, the processing module, the second acquisition module and the updating module until the maximum signal amplitude in the current frequency band meets the preset condition, and determining the target reference frequency corresponding to the current frequency band as the excitation frequency.
According to another aspect of the embodiments of the present application, there is also provided a nonvolatile storage medium in which a computer program is stored, wherein the computer program is configured to perform the above-described determination method of the excitation frequency at runtime.
According to another aspect of the embodiments of the present application, there is also provided a processor for running a program, wherein the program is configured to perform the above-described method of determining an excitation frequency at run-time.
In the embodiment of the application, a mode of determining the direction and the position of the resonant frequency of the sensor by adopting a feedback signal is adopted, after the frequency range of the current frequency band of the sensor is acquired, a plurality of reference frequencies are determined in the frequency range, then the plurality of reference frequencies are processed based on random factors to obtain a plurality of random reference frequencies corresponding to the plurality of reference frequencies, the sensor is excited by the plurality of random reference frequencies, the signal amplitude of the feedback signal generated by the sensor is acquired, finally, the frequency range corresponding to the current frequency band is updated according to the signal amplitude, and the steps are repeatedly executed until the maximum signal amplitude in the current frequency band meets the preset condition, and the target reference frequency corresponding to the current frequency band is determined as the excitation frequency.
In the process, the frequency of the current frequency band of the sensor is divided, and the frequency range corresponding to the frequency band is updated in real time, so that the sensor does not need to sweep from the lower frequency limit to the upper frequency limit every time, the sweep frequency range of the sensor is shortened, and the problems of long acquisition time of the sensor and unstable signal acquisition are avoided.
Therefore, the scheme provided by the application achieves the purpose of rapidly determining the excitation frequency of the pipeline to be tested, thereby realizing the technical effect of improving the efficiency of tension measurement of the pipeline to be tested, and further solving the technical problem that the excitation frequency cannot be accurately determined in the prior art.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 is a flow chart of a method of determining an excitation frequency according to an embodiment of the present application;
FIG. 2 is a schematic illustration of an alternative single coil vibrating wire strain gauge measuring tension in accordance with an embodiment of the application;
FIG. 3 is a side view of an alternative electromagnetic coil according to an embodiment of the present application;
FIG. 4 is a top view of an alternative electromagnetic coil according to an embodiment of the present application;
FIG. 5 is a flowchart of an alternative excitation frequency determination method according to an embodiment of the present application;
fig. 6 is a schematic diagram of a device for determining an excitation frequency according to an embodiment of the present application.
Detailed Description
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
According to an embodiment of the present application, there is provided an embodiment of a method for determining an excitation frequency, it being noted that the steps shown in the flowchart of the drawings may be performed in a computer system such as a set of computer executable instructions, and that although a logical order is shown in the flowchart, in some cases the steps shown or described may be performed in an order different from that herein.
FIG. 1 is a flow chart of a method for determining an excitation frequency according to an embodiment of the present application, as shown in FIG. 1, the method comprising the steps of:
step A: and acquiring a frequency range to which the current frequency range of the sensor belongs, wherein the sensor is used for detecting the tension of the pipeline to be detected.
In step a, the pipeline to be measured is a long-distance natural gas pipeline, and the sensor may be a strain gauge acquisition device, where the strain gauge acquisition device may be, but is not limited to, a single-coil vibrating wire strain gauge. Alternatively, fig. 2 shows a schematic diagram of an alternative single-coil vibrating wire strain gauge for measuring tension, specifically, the pipe to be measured is first stretched between two end blocks, and the end blocks are welded on the surface of the pipe to be measured. Deformation (e.g., strain change) of the pipe under test will cause relative movement of the two end blocks, thereby causing the wire tension of the pipe under test to change. The tension of the steel string changes to cause the resonance frequency of the pipeline to be measured to change, so that the steel string is excited to resonate through an electromagnetic coil closely attached to the steel string, and the tension of the pipeline to be measured can be determined through measuring a frequency signal of the steel string during resonance. In addition, fig. 3 shows a side view of the electromagnetic coil, and fig. 4 shows a top view of the electromagnetic coil.
In addition, the maximum frequency range of the frequency band of the sensor is the range frequency of the sensor, and the frequency range can be reduced by carrying out repeated iterative division on the frequency range of the current frequency band of the sensor, so that the resonance frequency of the pipeline to be detected can be found more easily in the reduced frequency range.
And (B) step (B): a plurality of reference frequencies is determined in a frequency range.
In step B, the frequency range may be divided into a plurality of sub-bands, where the frequency value at the dividing point corresponding to each sub-band is the reference frequency.
Step C: and processing the plurality of reference frequencies based on the random factor to obtain a plurality of random reference frequencies corresponding to the plurality of reference frequencies.
In step C, the random factor is a number greater than 1 and less than 2, where the random factor may be expressed as 1+random, and random is a random number greater than 0 and less than 1. Alternatively, the reference frequency may be multiplied by a random factor to obtain a random reference frequency corresponding to the reference frequency.
Step D: the sensor is excited with a plurality of random reference frequencies and the signal amplitude of the feedback signal generated by the sensor is obtained.
Step E: and E, updating the frequency range corresponding to the current frequency band according to the signal amplitude, repeating the steps A to E until the maximum signal amplitude in the current frequency band meets the preset condition, and determining the target reference frequency corresponding to the current frequency band as the excitation frequency.
In step D, if the maximum signal amplitude corresponding to the current frequency band meets the preset condition, it is indicated that the target reference frequency corresponding to the current frequency band is close to or equal to the resonance frequency of the sensor, and the target reference frequency can be used as the excitation frequency to excite the sensor. If the maximum signal amplitude corresponding to the current frequency band does not meet the preset condition, the frequency range of the current frequency band is further narrowed, and therefore the purpose of quickly determining the excitation frequency is achieved.
Based on the schemes defined in the steps a to E, it can be known that, in the embodiment of the present application, a mode of determining the direction and the position of the resonant frequency of the sensor by using a feedback signal is adopted, after the frequency range of the current frequency band of the sensor is acquired, a plurality of reference frequencies are determined in the frequency range, then the plurality of reference frequencies are processed based on random factors, a plurality of random reference frequencies corresponding to the plurality of reference frequencies are obtained, the plurality of random reference frequencies excite the sensor, and the signal amplitude of the feedback signal generated by the sensor is acquired, finally, the frequency range corresponding to the current frequency band is updated according to the signal amplitude, and the steps are repeatedly executed until the maximum signal amplitude in the current frequency band meets the preset condition, and the target reference frequency corresponding to the current frequency band is determined as the excitation frequency.
It is easy to notice that in the above process, the current frequency band of the sensor is divided, and the frequency range corresponding to the frequency band is updated in real time, so that the sensor does not need to sweep from the lower frequency limit to the upper frequency limit each time, the sweep frequency range of the sensor is shortened, and the problems of long sensor acquisition time and unstable signal acquisition are avoided.
Therefore, the scheme provided by the application achieves the purpose of rapidly determining the excitation frequency of the pipeline to be tested, thereby realizing the technical effect of improving the efficiency of tension measurement of the pipeline to be tested, and further solving the technical problem that the excitation frequency cannot be accurately determined in the prior art.
In an alternative embodiment, before the frequency range to which the current frequency band of the sensor belongs is acquired, firstly, acquiring a sensitivity range corresponding to the sensor, then determining a frequency division width according to the sensitivity range and parameter information of the sensor, and finally dividing the range frequency range of the sensor into a plurality of equal-width frequency bands according to the frequency division width, wherein the current frequency band is any one of the plurality of equal-width frequency bands.
Optionally, the parameter information of the sensor includes, but is not limited to, the model number and the working parameter of the sensor.
The larger the frequency division width is, the faster the convergence is. But it is necessary to ensure that the maximum width of the frequency division is within the sensitivity range of the sensor and that a response is obtained when the excitation signal is applied to the sensor. Therefore, the frequency division width is determined by certain theoretical analysis and combining the conditions of the model, the working parameters and the like of the sensor, so that the excitation frequency corresponding to the sensor can be rapidly determined.
In an alternative embodiment, after the frequency range to which the current frequency band of the sensor belongs is acquired, a plurality of reference frequencies are determined in the frequency range. Specifically, the frequency range is divided into a plurality of frequency bands, and the frequency at the dividing point of each frequency band is set as the reference frequency corresponding to each frequency band, so as to obtain a plurality of reference frequencies.
Optionally, the frequency range of the measuring range can be roughly divided into a plurality of equal-width frequency bands according to the frequency range of the measuring range of the sensor, and the sensor is deactivated by taking the frequency value at the dividing point of each frequency band as the reference frequency. For example, the measuring range of the sensor is 1000Hz to 3000Hz, and if the measuring range is divided into 100 steps, the corresponding bandwidth of each frequency band is 20Hz.
Further, after the reference frequency is obtained, the sensor is excited at a plurality of reference frequencies, feedback signals corresponding to the plurality of reference frequencies are generated, and signal amplitudes of the feedback signals are obtained. For example, the sensor is excited by using the 100 frequency points as reference frequencies corresponding to excitation signals, and feedback signals returned by the sensor are detected, so that signal amplitudes of the feedback signals are obtained.
In an alternative embodiment, after the signal amplitude of the feedback signal generated by the sensor is obtained, the frequency range corresponding to the current frequency band is updated according to the signal amplitude. Specifically, the maximum signal amplitude is obtained, then the maximum signal amplitude is compared with a preset threshold value, if the maximum signal amplitude is smaller than or equal to the preset amplitude, the reference frequency corresponding to the maximum signal amplitude is obtained, and the frequency range corresponding to the current frequency band is updated according to the reference frequency pair corresponding to the maximum signal amplitude. If the maximum signal amplitude is larger than the preset amplitude, determining that the maximum signal amplitude in the current frequency band meets the preset condition.
In an alternative embodiment, after determining that the target reference frequency corresponding to the current frequency band is the excitation frequency, a resonance signal of the pipe to be measured when the pipe to be measured resonates at the excitation frequency is also acquired, and the tension of the pipe to be measured is determined according to the resonance signal.
Under normal conditions, the strain change of the pipeline to be tested is a continuous and slowly-changing analog quantity, and is rigidly connected with the pipeline to be tested. Therefore, the resonance frequency of the steel string is also a continuous and slowly-changing analog quantity, the sensor directly outputs an excitation frequency, the excitation frequency is close to the resonance frequency of the steel string, so that the steel string rapidly resonates, and then the sensor acquires a frequency signal when the pipeline to be detected resonates at the excitation frequency.
In an alternative embodiment, fig. 5 shows an alternative method for determining the excitation frequency, in fig. 5, the frequency range corresponding to the measuring range of the sensor is divided into a plurality of gears (for example, 100 gears), and then the reference frequency corresponding to each gear is multiplied by a random factor to obtain a random reference frequency, and the sensor is excited by using the random reference frequency to obtain a feedback signal of the sensor. If the signal amplitude of the feedback signal of the sensor reaches the maximum amplitude, the random reference frequency corresponding to the frequency band is the frequency which can enable the pipeline to be detected to resonate, and the sensor acquisition is finished. If the signal amplitude of the feedback signal of the sensor does not meet the preset condition, the sweep frequency range of the sensor is reduced, and the acquisition time of the sensor is shortened.
From the above, the scheme provided by the application is based on a random frequency modulation excitation strategy, and the resonance point of the sensor can be rapidly determined through a plurality of iterations, so that rapid and accurate acquisition of the sensor signal is realized. Moreover, each time of acquisition does not need to sweep from the lower frequency limit to the upper frequency limit, and the defects of long acquisition time and unstable signal acquisition are avoided. The method can quickly and accurately enable the strain gauge steel string to generate resonance, and the acquired signal amplitude is stronger and more stable. In addition, in the application, the on-site strain acquisition device has simple and reliable hardware structure and low and stable software complexity.
Example 2
According to an embodiment of the present application, there is provided an embodiment of an excitation frequency determining apparatus, where fig. 6 is a schematic diagram of an excitation frequency determining apparatus according to an embodiment of the present application, and as shown in fig. 6, the apparatus includes: a first acquisition module 601, a determination module 603, a processing module 605, a second acquisition module 607, and an update module 609.
The first acquiring module 601 is configured to acquire a frequency range to which a current frequency band of a sensor belongs, where the sensor is configured to detect tension of a pipeline to be tested; a determining module 603 for determining a plurality of reference frequencies in a frequency range; a processing module 605, configured to process the plurality of reference frequencies based on a random factor, to obtain a plurality of random reference frequencies corresponding to the plurality of reference frequencies; a second acquisition module 607, configured to excite the sensor with a plurality of random reference frequencies, and acquire a signal amplitude of a feedback signal generated by the sensor; the updating module 609 is configured to update the frequency range corresponding to the current frequency band according to the signal amplitude, and repeatedly execute the steps included in the first acquiring module, the determining module, the processing module, the second acquiring module, and the updating module until the maximum signal amplitude in the current frequency band meets a preset condition, and determine the target reference frequency corresponding to the current frequency band as the excitation frequency.
It should be noted that the first obtaining module 601, the determining module 603, the processing module 605, the second obtaining module 607, and the updating module 609 correspond to the steps a to E in the above embodiment 1, and the five modules are the same as examples and application scenarios implemented by the corresponding steps, but are not limited to those disclosed in the above embodiment 1.
Optionally, the determining device of the excitation frequency further includes: the device comprises a third acquisition module, a first determination module and a first division module. The third acquisition module is used for acquiring a sensitivity range corresponding to the sensor before acquiring a frequency range to which the current frequency band of the sensor belongs; the first determining module is used for determining the frequency division width according to the sensitivity range and the parameter information of the sensor; the first dividing module is used for dividing the range frequency range of the sensor into a plurality of equal-width frequency bands according to the frequency division width, wherein the current frequency band is any frequency band in the plurality of equal-width frequency bands.
Optionally, the determining module includes: the second dividing module and the setting module. The second dividing module is used for dividing the frequency range into a plurality of frequency bands; the setting module is used for setting the frequency at the dividing point of each frequency band as the reference frequency corresponding to each frequency band to obtain a plurality of reference frequencies.
Optionally, the second obtaining module includes: the generation module and the fourth acquisition module. The generating module is used for exciting the sensor at a plurality of random reference frequencies and generating feedback signals respectively corresponding to the plurality of reference frequencies; and the fourth acquisition module is used for acquiring the signal amplitude of the feedback signal.
Optionally, the updating module includes: the system comprises a fifth acquisition module, a sixth acquisition module and an updating sub-module. The fifth acquisition module is used for acquiring the maximum signal amplitude and obtaining the maximum signal amplitude; a sixth obtaining module, configured to obtain a reference frequency corresponding to the maximum signal amplitude if the maximum signal amplitude is less than or equal to the preset amplitude; and the updating sub-module is used for updating the frequency range corresponding to the current frequency band according to the reference frequency pair corresponding to the maximum signal amplitude.
Optionally, the determining device of the excitation frequency further includes: and the second determining module is used for determining that the maximum signal amplitude in the current frequency band meets the preset condition if the maximum signal amplitude is larger than the preset amplitude.
Optionally, the determining device of the excitation frequency further includes: the acquisition module and the third determination module. The acquisition module is used for acquiring a resonance signal of the pipeline to be detected when resonating at the excitation frequency after determining that the target reference frequency corresponding to the current frequency band is the excitation frequency; and the third determining module is used for determining the tension of the pipeline to be tested according to the resonance signals.
Example 3
According to another aspect of the embodiments of the present application, there is also provided a nonvolatile storage medium in which a computer program is stored, wherein the computer program is configured to execute the method of determining the excitation frequency in embodiment 1 described above at the time of execution.
Example 4
According to another aspect of the embodiments of the present application, there is also provided a processor for running a program, wherein the program is configured to execute the method of determining the excitation frequency in embodiment 1 described above at run-time.
The foregoing embodiment numbers of the present application are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
In the foregoing embodiments of the present application, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.
In the several embodiments provided in the present application, it should be understood that the disclosed technology may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of the units, for example, may be a logic function division, and may be implemented in another manner, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The foregoing is merely a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application, which are intended to be comprehended within the scope of the present application.
Claims (9)
1. A method of determining an excitation frequency, comprising:
step A: acquiring a frequency range of a current frequency band of a sensor, wherein the sensor is used for detecting the tension of a pipeline to be detected; before the frequency range of the current frequency band of the sensor is acquired, acquiring the sensitivity range corresponding to the sensor; determining the frequency division width according to the sensitivity range and the parameter information of the sensor; dividing the range frequency range of the sensor into a plurality of equal-width frequency bands according to the frequency division width, wherein the current frequency band is any frequency band in the plurality of equal-width frequency bands;
and (B) step (B): determining a plurality of reference frequencies in the frequency range;
step C: processing the plurality of reference frequencies based on a random factor to obtain a plurality of random reference frequencies corresponding to the plurality of reference frequencies, wherein the reference frequencies are multiplied by the random factor to obtain random reference frequencies corresponding to the reference frequencies;
step D: exciting the sensor by adopting the plurality of random reference frequencies, and acquiring the signal amplitude of a feedback signal generated by the sensor;
step E: and E, repeatedly executing the steps A to E until the maximum signal amplitude in the current frequency band meets the preset condition, and determining the target reference frequency corresponding to the current frequency band as the excitation frequency.
2. The method of claim 1, wherein determining a plurality of reference frequencies in the frequency range comprises:
dividing the frequency range into a plurality of frequency bands;
and obtaining the plurality of reference frequencies according to the frequency setting at the dividing point of each frequency band as the reference frequency corresponding to each frequency band.
3. The method of claim 1, wherein exciting the sensor with the plurality of random reference frequencies and obtaining a signal amplitude of a feedback signal generated by the sensor comprises:
exciting the sensor at the plurality of random reference frequencies to generate feedback signals respectively corresponding to the plurality of reference frequencies;
and acquiring the signal amplitude of the feedback signal.
4. A method according to claim 3, wherein updating the frequency range corresponding to the current frequency band according to the signal amplitude comprises:
obtaining the maximum signal amplitude, and obtaining the maximum signal amplitude;
if the maximum signal amplitude is smaller than or equal to a preset amplitude, acquiring a reference frequency corresponding to the maximum signal amplitude;
and updating the frequency range corresponding to the current frequency band according to the reference frequency pair corresponding to the maximum signal amplitude.
5. The method according to claim 4, wherein the method further comprises:
and if the maximum signal amplitude is larger than the preset amplitude, determining that the maximum signal amplitude in the current frequency band meets the preset condition.
6. The method of claim 1, wherein after determining that the target reference frequency corresponding to the current frequency band is an excitation frequency, the method further comprises:
collecting resonance signals of the pipeline to be tested when resonating at the excitation frequency;
and determining the tension of the pipeline to be tested according to the resonance signal.
7. An excitation frequency determining apparatus, comprising:
the system comprises a first acquisition module, a second acquisition module and a control module, wherein the first acquisition module is used for acquiring a frequency range of a current frequency band of a sensor, and the sensor is used for detecting the tension of a pipeline to be detected; before the frequency range of the current frequency band of the sensor is acquired, acquiring the sensitivity range corresponding to the sensor; determining the frequency division width according to the sensitivity range and the parameter information of the sensor; dividing the range frequency range of the sensor into a plurality of equal-width frequency bands according to the frequency division width, wherein the current frequency band is any frequency band in the plurality of equal-width frequency bands;
a determining module for determining a plurality of reference frequencies in the frequency range;
the processing module is used for processing the plurality of reference frequencies based on a random factor to obtain a plurality of random reference frequencies corresponding to the plurality of reference frequencies, wherein the reference frequencies are multiplied by the random factor to obtain random reference frequencies corresponding to the reference frequencies;
the second acquisition module is used for exciting the sensor by adopting the plurality of random reference frequencies and acquiring the signal amplitude of the feedback signal generated by the sensor;
and the updating module is used for updating the frequency range corresponding to the current frequency band according to the signal amplitude, repeatedly executing the steps contained in the first acquisition module, the determining module, the processing module, the second acquisition module and the updating module until the maximum signal amplitude in the current frequency band meets the preset condition, and determining the target reference frequency corresponding to the current frequency band as the excitation frequency.
8. A non-volatile storage medium, characterized in that a computer program is stored in the non-volatile storage medium, wherein the computer program is arranged to perform the method of determining the excitation frequency as claimed in any one of claims 1 to 6 when run.
9. A processor, characterized in that the processor is adapted to run a program, wherein the program is arranged to perform the method of determining the excitation frequency as claimed in any one of claims 1 to 6 at run time.
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