CN113783497A - Filter frequency modulation control method - Google Patents
Filter frequency modulation control method Download PDFInfo
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- CN113783497A CN113783497A CN202111009798.2A CN202111009798A CN113783497A CN 113783497 A CN113783497 A CN 113783497A CN 202111009798 A CN202111009798 A CN 202111009798A CN 113783497 A CN113783497 A CN 113783497A
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- Prior art keywords
- processor
- hall sensor
- frequency modulation
- linear hall
- filter
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/14—Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/207—Hollow waveguide filters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Control Of Position Or Direction (AREA)
Abstract
The present disclosure provides a filter frequency modulation control method, which includes the following steps: setting the frequency of a required filter, inputting a frequency signal into a processor, controlling the motor to rotate by the processor, driving an actuating mechanism to push a medium sheet to move linearly by the motor, and enabling an induction piece on the actuating mechanism to move linearly synchronously with the medium sheet; the linear sensor detects the position of the induction piece and feeds detection information back to the processor, the processor judges whether the medium piece moves in place or not according to the feedback information of the linear sensor until the medium piece moves to a position matched with the set frequency, and the processor controls the motor to stop rotating to finish the frequency modulation of the filter. This openly adopts linear sensor to detect the position of response piece to the feedback detects information and controls the displacement of medium piece for the treater, thereby realizes the accurate frequency modulation of wave filter, and the precision of frequency modulation is high, and the difficult error etc. that appears of frequency modulation has improved precision, stability and the reliability etc. of wave filter.
Description
Technical Field
The present disclosure relates to filters, and more particularly, to a frequency modulation control method for a filter.
Background
The filter is a frequency selection device, can effectively filter the frequency point of specific frequency in the power line or frequencies except the frequency point to obtain a power signal of specific frequency, or eliminate the power signal after a specific frequency, thereby filtering various power supplies, signals and the like, ensuring the stability and reliability of circuit operation, and being an important component in the field of electronic communication. At present, the frequency modulation control of a filter generally converts the rotary motion output by a motor into the horizontal motion of a sliding table through a screw pair, and then changes the gap between a filter medium sheet fixedly connected with the sliding table and a resonant cavity, so that the waveform frequency band of the filter reaches a required value, the frequency modulation is realized, and the frequency modulation frequency of the filter corresponds to the position of the medium sheet one to one.
However, most of the existing frequency modulation methods adopt an encoder mode to indirectly detect the position of a medium sheet, the number of rotating turns of a motor output shaft is controlled by the encoder, and then the number of rotating turns of the motor output shaft is converted into the moving distance of the medium sheet.
Disclosure of Invention
The disclosure aims to provide a filter frequency modulation control method, which can solve at least one of the above technical problems, and the technical scheme of the disclosure is as follows:
a frequency modulation control method of a filter comprises the following steps:
setting the frequency of a required filter, inputting a frequency signal into a processor, controlling the motor to rotate by the processor, driving an actuating mechanism to push a medium sheet to move linearly by the motor, and enabling an induction piece on the actuating mechanism to move linearly synchronously with the medium sheet;
the linear sensor detects the position of the induction piece and feeds detection information back to the processor, the processor judges whether the medium piece moves in place or not according to the feedback information of the linear sensor until the medium piece moves to a position matched with the set frequency, and the processor controls the motor to stop rotating to finish the frequency modulation of the filter.
In some embodiments, the linear sensor is a linear hall sensor, the sensing element is a permanent magnet, the input voltage of the linear hall sensor is kept unchanged, the output voltage of the linear hall sensor linearly changes along with the linear movement of the permanent magnet, the output voltage of the linear hall sensor corresponds to the frequency one by one, the output voltage of the linear hall sensor is fed back to the processor in real time, the processor determines whether the medium sheet is moved in place according to the output voltage of the linear hall sensor, then the processor controls the motor to stop rotating or continue to rotate and adjust until the actual output voltage fed back to the processor by the linear hall sensor is consistent with the output voltage of the linear hall sensor corresponding to the set frequency after the medium sheet stops moving.
In some embodiments, the linear hall sensor is input with a voltage from a regulated power supply.
In some embodiments, the processor employs a microprocessor.
In some embodiments, the actuator adopts a screw rod mechanism, a motor drives a screw rod of the screw rod mechanism to rotate, a sliding table of the screw rod mechanism drives a medium sheet connected with the sliding table to move linearly, and a permanent magnet is fixed on the sliding table.
In some embodiments, the motor drives the screw rod to rotate through the speed reducer.
In some embodiments, the linear hall sensor is fixedly mounted on the support.
In some embodiments, the linear hall sensor is located on one side of the sliding table in the moving direction, and the permanent magnet is located on one side of the sliding table close to the linear hall sensor.
The beneficial effects of this disclosure are: motor drive actuating mechanism promotes medium piece linear motion, the synchronous linear motion of response piece and medium piece on the actuating mechanism, linear transducer detects through the position to the response piece, detect the position of medium piece promptly, and the moving distance that the feedback detected information controlled the medium piece for the treater, thereby realize the accurate frequency modulation of wave filter, the precision of frequency modulation is high, the difficult error etc. that appears of frequency modulation, the precision, stability and the reliability etc. of having improved the wave filter, the application and the development of wave filter have been enlarged.
In addition, in the technical solutions of the present disclosure, the technical solutions can be implemented by adopting conventional means in the art, unless otherwise specified.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic diagram of a filter frequency modulation control method according to an embodiment of the disclosure.
Fig. 2 is a schematic diagram illustrating a filter frequency modulation control method according to an embodiment of the disclosure.
Fig. 3 is a curve of the output voltage of the linear hall sensor according to an embodiment of the present disclosure corresponding to a permanent magnet (dielectric sheet).
Fig. 4 is a schematic structural diagram of a filter frequency modulation device according to an embodiment of the present disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of some, but not all, embodiments of the disclosure and are not to be considered as limiting the disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
In the description of the present disclosure, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "both ends", "both sides", "bottom", "top", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the elements referred to must have a particular orientation or be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present disclosure. Furthermore, the terms "first," "second," "upper," "lower," "primary," "secondary," and the like are used for descriptive purposes only and may be used for purposes of simplicity in more clearly distinguishing between various components and not to indicate or imply relative importance.
In the description of the present disclosure, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are used in a broad sense and can be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, or connected through the inside of two elements. The specific meaning of the above terms in the present disclosure can be understood in specific instances by those of ordinary skill in the art.
Referring to fig. 1 to 4, a filter frequency modulation control method according to the present disclosure is schematically shown, including the following steps:
the frequency of the filter and the position of the medium piece are in a one-to-one correspondence relationship, corresponding information is stored and recorded in a processor, the frequency of the required filter is set, a frequency signal is input into the processor, then the processor controls the motor to rotate, usually, the processor calculates the number of turns of the motor which needs to rotate according to the correspondence relationship between the frequency and the position of the medium piece, the transmission ratio of a transmission system and the like, and transmits the corresponding signal to a driver of the motor to drive the motor to rotate, the motor drives the medium piece to move linearly through driving an executing mechanism, and an induction part on the executing mechanism and the medium piece synchronously move linearly, namely the induction part and the medium piece synchronously move together;
the linear sensor detects the position of the induction piece and feeds detection information back to the processor, the processor judges whether the medium piece moves in place according to the feedback information of the linear sensor, and then the motor is controlled to stop rotating or continue rotating until the medium piece moves to a position matched with the set frequency, and the processor finally controls the motor to stop rotating to finish frequency modulation of the filter.
The displacement sensor is also called a linear sensor, and is used for converting various measured physical quantities into electric quantities, such as a linear displacement sensor, a photoelectric displacement sensor and a linear hall sensor.
The linear sensor adopts a linear Hall sensor, and the sensing part adopts a permanent magnet, such as a magnet, magnetic steel and the like. Keeping the input voltage of the linear hall sensor unchanged, the output voltage of the linear hall sensor is linearly related to the magnetic field strength where the linear hall sensor is located, that is, the output voltage of the linear hall sensor linearly changes along with the linear movement of the permanent magnet, as shown in fig. 3, the corresponding relation between the output voltage of the linear hall sensor and the permanent magnet (dielectric sheet) is linear, so that the output voltage of the linear hall sensor and the frequency modulation frequency correspond to each other one by one, and the corresponding information between the output voltage of the linear hall sensor and the frequency modulation frequency is stored and recorded in the processor as a comparison with the actual output voltage fed back to the processor by the linear hall sensor during frequency modulation, that is, a theoretical value.
In the frequency modulation process, the motor drives the actuating mechanism to push the medium sheet and the permanent magnet to synchronously and linearly move, the input voltage of the linear Hall sensor is not changed, the actual magnetic field intensity of the linear Hall sensor synchronously changes along with the actual position change of the permanent magnet relative to the linear Hall sensor, thereby the output voltage of the linear Hall sensor also changes synchronously, the linear Hall sensor feeds the output voltage back to the processor in real time, the processor determines whether the medium piece moves in place or not according to the comparison of the actual output voltage fed back by the linear Hall sensor and the stored and recorded theoretical value, then the processor controls the motor to stop rotating or continue rotating and adjusting until the medium piece stops moving, and the actual output voltage fed back to the processor by the linear Hall sensor is consistent with the output voltage of the linear Hall sensor corresponding to the set frequency, so that the accurate frequency modulation of the filter is completed. If the actual output voltage fed back to the processor by the linear Hall sensor is larger or smaller than the theoretical value stored and recorded in the processor after the medium sheet stops moving, the actual moving distance of the medium sheet is larger or smaller, the processor recalculates and controls the motor to rotate to perform corresponding adjustment, after the medium sheet moves again and stops, the actual output voltage is fed back to the processor by the linear Hall sensor, the position of the medium sheet is repeatedly judged and adjusted until the position of the medium sheet is consistent with the set position matched with the frequency, and therefore accurate frequency modulation of the filter is achieved.
When the motor loses steps or the fit clearance of the transmission system causes that the medium sheet does not move to the set position, the position of the medium sheet can be readjusted through the feedback of the linear Hall sensor until the medium sheet moves to the position matched with the set frequency, and therefore accurate frequency modulation of the filter is achieved.
The voltage is input to the linear Hall sensor through the voltage stabilizing power supply, the voltage stabilizing power supply is high in efficiency, small in size and light in weight, stable current can be provided for the linear Hall sensor, the input voltage of the linear Hall sensor is guaranteed to be stable and unchanged, and the precision is higher.
The microprocessor is a central processing unit consisting of one or a few large-scale integrated circuits, can finish the operations of instruction fetching, instruction executing, information exchange with an external memory and a logic component and the like, and has the advantages of small volume, light weight, easy modularization and the like.
The actuator adopts a screw rod mechanism, as shown in fig. 4, the output end of the motor is connected with a screw rod driving the screw rod mechanism, the medium sheet is connected with a sliding table of the screw rod mechanism, and the permanent magnet is fixed on the sliding table of the screw rod mechanism. The motor drives the screw rod of the screw rod mechanism to rotate, and the sliding table of the screw rod mechanism moves linearly along with the rotation of the screw rod, so that the permanent magnet and the medium sheet are driven to move linearly and synchronously.
The motor passes through the reduction gear drive lead screw and rotates, and the reduction gear can adopt planet speed reduction structure or other suitable speed reduction structure, and the reduction gear can increase output torque, reduce output speed etc. and is more stable, reliable.
Linear hall sensor fixed mounting is on the support, and linear hall sensor is located the one side of slip table direction of motion, and the permanent magnet is located the one side that the slip table is close to linear hall sensor, and it is more convenient to operate, and is more stable, reliable.
Compared with the prior art, the advantage of this disclosure has: the linear sensor adopts a linear Hall sensor, the sensing part adopts a permanent magnet, the linear Hall sensor feeds back the output voltage of the linear change to the processor in real time along with the real position change of the permanent magnet relative to the linear Hall sensor, the processor determines whether the medium piece moves in place or not according to the comparison of the actual output voltage fed back by the linear Hall sensor and a stored and recorded theoretical value, then the processor controls the motor to stop rotating or continue to rotate and adjust until the medium piece stops, the actual output voltage fed back to the processor by the linear Hall sensor is consistent with the output voltage of the linear Hall sensor corresponding to the set frequency, the accurate frequency modulation of the filter is completed, and when the medium piece does not move to the set position due to the step loss of the motor or the fit clearance of a transmission system, the position of the medium piece can be readjusted through the feedback of the linear Hall sensor, the frequency modulation method has the advantages that the operation is convenient until the dielectric sheet moves to the position matched with the set frequency, the frequency modulation precision is high, the frequency modulation is not prone to error, the precision, the stability, the reliability and the like of the filter are improved, and the application and the development of the filter are enlarged.
The foregoing is directed to embodiments of the present disclosure, which are provided for illustration only and not for limitation, and it is understood that modifications and substitutions may be made by those skilled in the art without departing from the spirit of the disclosure and all such modifications and substitutions are to be considered within the scope of the appended claims. In this case all the details may be replaced with equivalent elements, and the materials, shapes and dimensions may be any.
Claims (8)
1. The filter frequency modulation control method is characterized by comprising the following steps:
setting the frequency of a required filter, inputting a frequency signal into a processor, controlling the motor to rotate by the processor, driving an actuating mechanism to push a medium sheet to move linearly by the motor, and enabling an induction piece on the actuating mechanism to move linearly synchronously with the medium sheet;
the linear sensor detects the position of the induction piece and feeds detection information back to the processor, the processor judges whether the medium piece moves in place or not according to the feedback information of the linear sensor until the medium piece moves to a position matched with the set frequency, and the processor controls the motor to stop rotating to finish the frequency modulation of the filter.
2. The filter frequency modulation control method according to claim 1, wherein the linear sensor is a linear hall sensor, the sensing element is a permanent magnet, the input voltage of the linear hall sensor is kept unchanged, the output voltage of the linear hall sensor linearly changes along with the linear movement of the permanent magnet, the output voltage of the linear hall sensor corresponds to the frequency one to one, the linear hall sensor feeds back the output voltage to the processor in real time, the processor determines whether the medium sheet is moved in place according to the output voltage of the linear hall sensor, and then the processor controls the motor to stop rotating or continue to rotate and adjust until the actual output voltage fed back to the processor by the linear hall sensor is consistent with the output voltage of the linear hall sensor corresponding to the set frequency after the medium sheet stops moving.
3. A method of frequency modulation control for a filter according to claim 2 wherein the voltage is input to the linear hall sensor by a regulated power supply.
4. A method as claimed in claim 3, wherein said processor is a microprocessor.
5. A frequency modulation control method for a filter according to claim 4, wherein the actuator adopts a screw mechanism, a motor drives a screw of the screw mechanism to rotate, a sliding table of the screw mechanism drives a medium sheet connected with the sliding table to move linearly, and a permanent magnet is fixed on the sliding table.
6. A filter frequency modulation control method according to claim 5, wherein the motor drives a screw rod to rotate through a speed reducer.
7. The filter frequency modulation control method of claim 6, wherein the linear Hall sensor is fixedly mounted on a support.
8. The method of claim 7, wherein the linear Hall sensor is located at one side of the moving direction of the sliding table, and the permanent magnet is located at one side of the sliding table close to the linear Hall sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111009798.2A CN113783497A (en) | 2021-08-30 | 2021-08-30 | Filter frequency modulation control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111009798.2A CN113783497A (en) | 2021-08-30 | 2021-08-30 | Filter frequency modulation control method |
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| CN113783497A true CN113783497A (en) | 2021-12-10 |
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| CN202111009798.2A Withdrawn CN113783497A (en) | 2021-08-30 | 2021-08-30 | Filter frequency modulation control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114284660A (en) * | 2021-12-24 | 2022-04-05 | 武汉凡谷电子技术股份有限公司 | Frequency shift method of frequency-adjustable filter |
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2021
- 2021-08-30 CN CN202111009798.2A patent/CN113783497A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114284660A (en) * | 2021-12-24 | 2022-04-05 | 武汉凡谷电子技术股份有限公司 | Frequency shift method of frequency-adjustable filter |
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Application publication date: 20211210 |