CN112532339B - Method and device for actively inhibiting electromagnetic interference of arc of pantograph-catenary - Google Patents
Method and device for actively inhibiting electromagnetic interference of arc of pantograph-catenary Download PDFInfo
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- CN112532339B CN112532339B CN202011487657.7A CN202011487657A CN112532339B CN 112532339 B CN112532339 B CN 112532339B CN 202011487657 A CN202011487657 A CN 202011487657A CN 112532339 B CN112532339 B CN 112532339B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/60—Jamming involving special techniques
- H04K3/62—Jamming involving special techniques by exposing communication, processing or storing systems to electromagnetic wave radiation, e.g. causing disturbance, disruption or damage of electronic circuits, or causing external injection of faults in the information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/80—Jamming or countermeasure characterized by its function
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
Abstract
The invention discloses a method and a device for actively inhibiting bow net arc electromagnetic interference, which judge the intensity degree of the bow net arc electromagnetic interference in real time through bow net arc electromagnetic interference information measured by an electromagnetic wave sensor, feed back the bow net arc electromagnetic interference information to a signal processing unit for electromagnetic interference comparison, and regulate and control an electromagnetic wave generating device to emit electromagnetic waves with the same frequency, the same amplitude and the opposite phase as the bow net arc electromagnetic interference through the signal processing unit, and generate destructive interference with the electromagnetic interference generated by the bow net arc, thereby greatly inhibiting the electromagnetic interference of the bow net arc to the inside and the outside of a train.
Description
Technical Field
The invention relates to the technical field of electromagnetic interference suppression, in particular to a method and a device for actively suppressing electromagnetic interference of a bow net arc.
Background
In recent years, with the continuous progress of high-speed railway technology, the speed of a train is faster and faster, and the bow net electric arc phenomenon is more and more serious, so that a lot of hazards brought by the phenomena are more threatening the life and property safety of people, and become one of the great obstacles of railway development.
The formation of bow-net arcs is accompanied by intense electromagnetic radiation, which produces severe electromagnetic pollution. Power electronics, wireless communication devices and other digitizing devices are widely used in modern electric locomotives. The electromagnetic sensitive devices work in an electromagnetic environment when a train runs, are very easily affected by electromagnetic interference of the train to cause the abnormal work of the electromagnetic sensitive devices, and even threaten the driving safety when the electromagnetic sensitive devices are serious. Therefore, exploring methods for suppressing electromagnetic interference of pantograph-catenary arc and maintaining safe and stable operation of trains are one of the main development directions of next-generation electric locomotives.
Disclosure of Invention
Aiming at the defects in the prior art, the method and the device for actively inhibiting the electromagnetic interference of the pantograph-catenary arc provided by the invention solve the problem of the excessively strong electromagnetic interference of the pantograph-catenary arc in the electric locomotive.
In order to achieve the purpose of the invention, the invention adopts the technical scheme that: a method for actively suppressing electromagnetic interference of a bow net arc comprises the following steps:
s1, collecting electromagnetic interference data of an arc network arc through an electromagnetic wave sensor and transmitting the data to a signal processing unit;
s2, finding the central point of the pantograph-catenary arc column through the signal processing unit according to the pantograph-catenary arc electromagnetic interference data, starting the motor control unit, and adjusting the angle of the electromagnetic wave transmitting device until the electromagnetic wave transmitting device is over against the central point of the pantograph-catenary arc column;
and S3, starting the electromagnetic wave emission device to emit electromagnetic waves to the central point of the arc column of the arc net, and generating destructive interference with the electromagnetic interference of the arc net, so as to inhibit the electromagnetic interference of the arc net.
Further, step S2 comprises the following substeps:
s21, based on the pantograph-catenary arc electromagnetic interference data, finding the position with the strongest pantograph-catenary arc electromagnetic interference, namely the central point of a pantograph-catenary arc column, through the signal processing unit, and transmitting the position information of the central point of the pantograph-catenary arc column to the motor control unit;
and S22, according to the position information of the central point of the arc column of the pantograph net, the rotating direction and the number of turns of the main lifting motor are adjusted through the motor control unit, and the main lifting motor drives the electromagnetic wave emitting device to move until the electromagnetic wave emitting device is over against the central point of the arc column of the pantograph net.
Further, step S3 comprises the following substeps:
s31, processing the pantograph-catenary arc electromagnetic interference data through a signal processing unit to obtain real-time frequency, amplitude and phase information of the pantograph-catenary arc electromagnetic interference;
s32, transmitting the real-time frequency, amplitude and phase information of the electromagnetic interference of the pantograph-catenary arc to a transmitting control unit through a signal processing unit;
s33, the electromagnetic wave emitting device is controlled by the emitting control unit to emit electromagnetic waves with the same frequency, the same amplitude and the opposite phase information as those of the pantograph-catenary arc electromagnetic interference, and destructive interference is generated between the electromagnetic waves and the pantograph-catenary arc electromagnetic interference, so that the pantograph-catenary arc electromagnetic interference is suppressed.
An apparatus for actively suppressing bow net arc electromagnetic interference, comprising: the device comprises a signal processing unit, a motor control unit, a main lifting motor, an emission control unit, an electromagnetic wave shielding pot main rotating rod, a main lifting rod, a lifting rod base, an electromagnetic wave shielding pot auxiliary rotating rod, an auxiliary lifting rod, an electromagnetic wave sensor emission device support frame, an electromagnetic wave emission device, a main lifting rod rack, a main lifting rod gear, a pantograph slide plate support and a pantograph head support;
the signal processing unit is respectively in communication connection with the emission control unit and the motor control unit; the emission control unit is in communication connection with the electromagnetic wave emission device; the motor control unit is electrically connected with the main lifting motor respectively; the electromagnetic wave shielding pot is fixedly connected with the electromagnetic wave emitting device through the emitting device support frame and is used for concentrating the electromagnetic waves emitted by the electromagnetic wave emitting device and absorbing the electromagnetic interference of the bow net electric arc which cannot be compensated; one end of the electromagnetic wave shielding pot main rotating rod is fixedly connected with the electromagnetic wave shielding pot, and the other end of the electromagnetic wave shielding pot main rotating rod is rotatably connected with one end of the main lifting rod rack and used for adjusting the rotating angle of the electromagnetic wave transmitting device together with the electromagnetic wave shielding pot auxiliary rotating rod; two main lifting rod gears are arranged inside one end of each main lifting rod, and the other end of each main lifting rod gear is fixedly connected with the lifting rod base; the other end of the main lifting rod rack is trapped between the two main lifting rod gears and is in meshing transmission with the two main lifting rod gears; the main elevating motor includes: a first motor and a second motor; the first motor and the second motor are respectively fixedly connected with a main lifting rod gear and respectively drive one main lifting rod gear; the lifting rod base is fixed on the pantograph angle of the pantograph; one end of the auxiliary lifting rod is fixedly connected with the lifting rod base, and the other end of the auxiliary lifting rod is rotatably connected with one end of the electromagnetic wave shielding pot auxiliary rotating rod; the other end of the electromagnetic wave shielding pot auxiliary rotating rod is fixedly connected with the electromagnetic wave shielding pot; the electromagnetic wave sensor is fixedly connected with the auxiliary lifting rod and used for collecting bow net arc electromagnetic interference data in real time; one end of the pantograph slide plate bracket is fixedly connected with the pantograph slide plate, and the other end of the pantograph slide plate bracket is fixedly connected with the pantograph head bracket; and the pantograph angle of the pantograph is fixed on the pantograph slide plate bracket.
Further, the pantograph pan support comprises: a pantograph slide plate base, a slide plate support rod bolt, a slide plate support rod, a support connecting rod, a slide plate support rod base and a pantograph head base bolt;
the base of the pantograph slide plate is respectively fixedly connected with the pantograph slide plate and the pantograph angle; one end of the slide plate support rod is fixedly connected with the pantograph slide plate base through a slide plate support rod bolt, and the other end of the slide plate support rod is fixedly connected with one end of the support connecting rod; the other end of the supporting connecting rod is fixedly connected with one end of the sliding plate supporting rod base; the other end of the sliding plate support rod base is fixedly connected with the pantograph bow support through a bow base bolt.
Further, the pantograph bow holder comprises: the pantograph head comprises a pantograph head base, a base connecting frame, a pantograph head fixing frame, a pantograph head connecting rod hole, a pantograph head connecting rod bolt and a pantograph head connecting rod;
one end of the pantograph head base of the pantograph is fixedly connected with the other end of the sliding plate support rod base through a pantograph head base bolt; one end of the base connecting frame is fixedly connected with one side of the middle of the pantograph head base; the bow fixing frame is of a U-shaped symmetrical structure, one end of the bow fixing frame is fixedly connected with the other end of the base connecting frame, and the symmetrical line of the bow fixing frame is fixedly provided with the same symmetrical bow connecting rod hole and the same symmetrical bow connecting rod bolt; the symmetrical line of the bow head fixing frame is provided with a screw hole, and two sides of the symmetrical line are provided with bolt bases; the bow connecting rod bolt is fixedly connected with a bow connecting rod hole through a screw hole and is fixedly connected with the bow fixing frame through a bolt base; the bow connecting rod is fixedly connected with the bow connecting rod bolt.
Further, the types of ICP materials laid on the electromagnetic wave shielding pan include: PAN polyaniline, PPY polypyrrole, and PTH polythiophene.
Further, the lifter base is made of SMC composite material.
In conclusion, the beneficial effects of the invention are as follows:
1. the electromagnetic interference degree of the pantograph-catenary arc is judged in real time through the electromagnetic interference information of the pantograph-catenary arc measured by the electromagnetic wave sensor, and then the information is fed back to the signal processing unit for electromagnetic interference comparison, and the signal processing unit regulates and controls the electromagnetic wave generating device to emit electromagnetic waves which have the same frequency, the same amplitude and the opposite phase with the pantograph-catenary arc electromagnetic interference and generate destructive interference with the electromagnetic interference generated by the pantograph-catenary arc, so that the electromagnetic interference of the pantograph-catenary arc to the inside and the outside of the train is greatly inhibited, the electric equipment around the train is effectively protected, and the ecological environment along the train is also protected;
2. according to the invention, the active electromagnetic interference suppression device is arranged at the pantograph angle of the high-speed train, the auxiliary lifting rod and the lifting rod base can prevent the contact wire from sliding out of the sliding plate area when sliding, so that the problem that the contact wire can slide out of the pantograph angle to the area below the pantograph head when sliding at high speed is solved, the stability of current collection of a pantograph-catenary system is effectively improved, and the safe and stable operation of the train is well ensured;
3. according to the invention, electromagnetic waves with different frequencies, amplitudes and phases are selected according to the information of pantograph-catenary arc electromagnetic interference monitored and fed back by the electromagnetic wave sensor in real time, so that the working efficiency is effectively improved, the cost is saved, and the convenience in operation is further improved;
4. the invention controls the on-off of the electromagnetic wave emitting device through the motor control unit and the emitting device control unit, further improves the pertinence and the accuracy of the electromagnetic wave emitting angle, and enables the electromagnetic interference suppression device of the whole high-speed train to be more automatic.
Drawings
FIG. 1 is a flow chart of a method for actively suppressing electromagnetic interference in a bow net arc;
FIG. 2 is a front view of an apparatus for actively suppressing electromagnetic interference from a bow net arc;
FIG. 3 is a side view of an apparatus for actively suppressing electromagnetic interference from a bow net arc;
FIG. 4 is a schematic structural view of an electromagnetic wave shielding pan;
FIG. 5 is a schematic view of the interior of the main lift pins;
wherein, 1, electromagnetic wave shielding pot; 2. the electromagnetic wave shielding pan main rotating rod; 3. a main lifting rod; 4. a lifter base; 5. a pantograph angle; 6. an electromagnetic wave shielding pan auxiliary rotating rod; 7. an auxiliary lifting rod; 8. an electromagnetic wave sensor; 9. a transmitting device support frame; 10. an electromagnetic wave emitting device; 11. a main lifter bar frame; 12. a main lifter gear; 13. a bow net arc column; 14. a pantograph slide plate; 15. a pantograph pan support; 151. a pantograph slide plate base; 152. a slide plate support rod bolt; 153. a slide plate support rod; 154. a support link; 155. a slide plate support rod base; 156. a bow head base bolt; 16. a pantograph head support; 161. a pantograph head base; 162. a base connecting frame; 163. a bow head fixing frame; 164. a bow connecting rod aperture; 165. a bow tie rod bolt; 166. a bow head connecting rod.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
As shown in fig. 1, a method for actively suppressing electromagnetic interference of a bow net arc includes the following steps:
s1, collecting electromagnetic interference data of a bow net arc through an electromagnetic wave sensor 8 and transmitting the data to a signal processing unit;
s2, finding the central point of the pantograph-catenary arc column through the signal processing unit according to the pantograph-catenary arc electromagnetic interference data, starting the motor control unit, and adjusting the angle of the electromagnetic wave emitting device 10 until the electromagnetic wave emitting device 10 is over against the central point of the pantograph-catenary arc column;
step S2 includes the following substeps:
s21, based on the pantograph-catenary arc electromagnetic interference data, finding the position with the strongest pantograph-catenary arc electromagnetic interference, namely the central point of a pantograph-catenary arc column, through the signal processing unit, and transmitting the position information of the central point of the pantograph-catenary arc column to the motor control unit;
and S22, adjusting the rotating direction and the number of turns of the main lifting motor through the motor control unit according to the position information of the central point of the arc column of the pantograph net, and driving the electromagnetic wave emitting device 10 to move through the main lifting motor until the electromagnetic wave emitting device 10 is over against the central point of the arc column of the pantograph net.
And S3, starting the electromagnetic wave emitting device 10 to emit electromagnetic waves to the central point of the arc column of the arc network, and generating destructive interference with the electromagnetic interference of the arc network, so as to inhibit the electromagnetic interference of the arc network.
Step S3 comprises the following sub-steps:
s31, processing the pantograph-catenary arc electromagnetic interference data through a signal processing unit to obtain real-time frequency, amplitude and phase information of the pantograph-catenary arc electromagnetic interference;
s32, transmitting the real-time frequency, amplitude and phase information of the electromagnetic interference of the pantograph-catenary arc to a transmitting control unit through a signal processing unit;
and S33, controlling the electromagnetic wave emitting device 10 to emit electromagnetic waves with the same frequency, the same amplitude and the opposite phase information as those of the pantograph-catenary arc electromagnetic interference through the emission control unit, and generating destructive interference with the pantograph-catenary arc electromagnetic interference so as to inhibit the pantograph-catenary arc electromagnetic interference.
As the pantograph-catenary arc can generate strong electromagnetic interference, the amplitude, the phase and the like of the pantograph-catenary arc are changed in real time along with the offline process of the pantograph-catenary, and in order to suppress the pantograph-catenary arc electromagnetic interference in real time, the additional electromagnetic wave can generate destructive interference with the pantograph-catenary arc electromagnetic interference under the action of an external electromagnetic field as long as the amplitude and the phase of the additional electromagnetic wave correspond to the pantograph-catenary arc electromagnetic interference in real time one by one, so that the aim of suppressing the pantograph-catenary arc electromagnetic interference is fulfilled, and the running stability of a train is greatly improved.
According to the knowledge of optics and electromagnetism, when two lines of electromagnetic waves propagate and overlap in the same medium, the particles of the medium in the overlapping range are acted by the two lines of electromagnetic waves at the same time. If the amplitude of the electromagnetic wave is not large, the vibration displacement of the medium particle in the overlapping range is equal to the vector sum of the displacements caused by each wave, which is called the wave superposition principle. If the peak of one of the two waves and the valley of the other wave arrive at the same location at the same time, the two waves are said to be in anti-phase at that point, and the interfering waves will produce the smallest amplitude, known as destructive interference.
The electromagnetic wave intensity is defined as the average value of energy in a unit area perpendicular to the propagation direction in unit time and time, namely the average value of a Bovingtin vector and time, and the expression of the electromagnetic wave intensity I is as follows:
wherein c is the propagation speed of electromagnetic waves, epsilon is the relative dielectric constant of the medium, mu is the conductivity of the medium,
is a vector of the glass print booth,
is the electric field strength.
The total electromagnetic wave intensity after two lines of electromagnetic waves interfere can be obtained by the formula:
wherein, I 1 For the intensity of the electromagnetic interference of the bow net arc, I 2 To emit the electromagnetic wave intensity, δ is the phase difference between two lines of electromagnetic waves.
According to the formula, the intensity of the interfered electromagnetic wave is a function of the phase difference, and the electromagnetic wave has a maximum value when delta =0,2 pi, 4 pi and 8230
Has a minimum value when delta = pi, 3 pi, 5 pi, \ 8230
In particular, when the two lines of electromagnetic waves have the same intensity, I 1 ＝I 2 ＝I 0 The above formula can be simplified to:
the maximum value at this time is 4I 0 The minimum value is 0.
Because the limitation of the prior art means, it is very difficult that two rows of electromagnetic waves generate destructive interference in real time, and in the embodiment, a mode of combining online with offline is adopted: performing online frequency tracking by using a phase-locked loop, and performing online amplitude and phase modulation by using a DSP circuit; establishing an off-line database which comprises position data of contact line hard points and excessive equal pantograph-catenary arc generating areas; the electromagnetic wave cancellation data corresponds to the electromagnetic interference of the pantograph-catenary arc with different frequencies, amplitudes and phases; and the electromagnetic wave data of the past cancellation are obtained on the same line at different contact line positions and at different train running speeds. The corresponding cancellation signal parameters can be conveniently searched in the database according to the dynamic parameters of the pantograph-catenary arc, so that the active cancellation signals can be calculated in advance and quickly generated and transmitted, and the effect of real-time destructive interference is approached.
However, during offline pantograph, the length of the arc column may change as the pantograph progresses offline. Therefore, in the actual operation process, the electromagnetic wave sensor 8 can collect the pantograph-catenary arc information in real time, and the signal processing unit adjusts the angle of the electromagnetic wave emitting device 10 according to the collected pantograph-catenary arc information, so that the electromagnetic wave emitting device 10 can follow the change of the central position of the pantograph-catenary arc column 13 and always just face the center of the arc column, the accuracy of the whole device is improved, and the working efficiency is guaranteed.
As shown in fig. 2 to 3, an active device for suppressing electromagnetic interference of a bow net arc comprises: the device comprises a signal processing unit, a motor control unit, a main lifting motor, an emission control unit, an electromagnetic wave shielding pan 1, an electromagnetic wave shielding pan main rotating rod 2, a main lifting rod 3, a lifting rod base 4, an electromagnetic wave shielding pan auxiliary rotating rod 6, an auxiliary lifting rod 7, an electromagnetic wave sensor 8, an emission device supporting frame 9, an electromagnetic wave emission device 10, a main lifting rod frame 11, a main lifting rod gear 12, a pantograph slide plate 14, a pantograph slide plate support 15 and a pantograph head support 16;
the signal processing unit is respectively in communication connection with the emission control unit and the motor control unit; the emission control unit is in communication connection with the electromagnetic wave emission device 10; the motor control unit is electrically connected with the main lifting motor respectively; the electromagnetic wave shielding pot 1 is fixedly connected with an electromagnetic wave emitting device 10 through an emitting device support frame 9 and is used for concentrating the electromagnetic waves emitted by the electromagnetic wave emitting device 10 and absorbing the electromagnetic interference of bow net electric arcs which cannot be offset; one end of the electromagnetic wave shielding pot main rotating rod 2 is fixedly connected with the electromagnetic wave shielding pot 1, and the other end of the electromagnetic wave shielding pot main rotating rod is rotatably connected with one end of the main lifting rod rack 11 and used for adjusting the rotating angle of the electromagnetic wave transmitting device 10 together with the electromagnetic wave shielding pot auxiliary rotating rod 6; two main lifting rod gears 12 are arranged inside one end of the main lifting rod 3, and the other end of the main lifting rod is fixedly connected with the lifting rod base 4; the other end of the main lifting rod rack 11 is trapped between the two main lifting rod gears 12 and is in meshing transmission with the two main lifting rod gears 12; the main elevating motor includes: a first motor and a second motor; the first motor and the second motor are respectively fixedly connected with a main lifting rod gear 12 and respectively drive one main lifting rod gear 12; the lifting rod base 4 is fixed on the pantograph angle 5; one end of the auxiliary lifting rod 7 is fixedly connected with the lifting rod base 4, and the other end of the auxiliary lifting rod is rotatably connected with one end of the electromagnetic wave shielding pot auxiliary rotating rod 6; the other end of the electromagnetic wave shielding pan auxiliary rotating rod 6 is fixedly connected with the electromagnetic wave shielding pan 1; the electromagnetic wave sensor 8 is fixedly connected with the auxiliary lifting rod 7 and is used for collecting bow net arc electromagnetic interference data in real time; one end of the pantograph slide plate bracket 15 is fixedly connected with the pantograph slide plate 14, and the other end of the pantograph slide plate bracket is fixedly connected with the pantograph head bracket 16; the pantograph angle 5 is fixed on the pantograph slide plate bracket 15.
Pantograph slide plate support 15 comprises: a pantograph slide base 151, a slide support rod bolt 152, a slide support rod 153, a support link 154, a slide support rod base 155, and a pantograph head base bolt 156;
the pantograph slide plate base 151 is fixedly connected with the pantograph slide plate 14 and the pantograph angle 5 respectively; one end of the slide plate support rod 153 is fixedly connected with the pantograph slide plate base 151 through a slide plate support rod bolt 152, and the other end thereof is fixedly connected with one end of a support connecting rod 154; the other end of the support connecting rod 154 is fixedly connected with one end of the sliding plate support rod base 155; the other end of the slide support rod base 155 is fixedly connected to the pantograph head support 16 via a head base bolt 156.
The pantograph head support 16 includes: a pantograph head base 161, a base connecting frame 162, a pantograph head fixing frame 163, a pantograph head connecting rod hole 164, a pantograph head connecting rod bolt 165 and a pantograph head connecting rod 166;
one end of the pantograph head base 161 is fixedly connected with the other end of the sliding plate support rod base 155 through a head base bolt 156; one end of the base connecting frame 162 is fixedly connected with one side of the middle of the pantograph head base 161; the bow fixing frame 163 is of a U-shaped symmetrical structure, one end of the bow fixing frame is fixedly connected with the other end of the base connecting frame 162, and a bow connecting rod hole 164 and a bow connecting rod bolt 165 which are also symmetrical are fixed on a symmetrical line of the bow fixing frame; screw holes are formed in the symmetry line of the bow fixing frame 163, and bolt bases are arranged on two sides of the symmetry line; the bow connecting rod bolt 165 is fixedly connected with the bow connecting rod hole 164 through a screw hole and is fixedly connected with the bow fixing frame 163 through a bolt base; the bow connecting rod 166 is fixedly connected to the bow connecting rod bolt 165.
The types of ICP materials laid on the electromagnetic wave shielding pan 1 include: PAN polyaniline, PPY polypyrrole and PTH polythiophene are used for concentrating electromagnetic waves emitted by the electromagnetic wave emitting device 10 and absorbing the electromagnetic interference of the bow net arc which cannot be counteracted.
The lifter base 4 is made of SMC composite material and is used for electrical insulation and protection of the whole device. The electromagnetic wave emitting device 10 is an adjustable ultrashort wave emitting device, and the frequency, amplitude and phase of the electromagnetic wave emitting device can be adjusted.
As shown in fig. 4, the electromagnetic wave emitting device 10 is connected to the inner wall of the electromagnetic wave shielding pot 1 through three emitting device supporting frames 9 with angles of 120 ° to each other.
As shown in fig. 5, two sets of gears are used for lifting the main lifting rod 3, the two sets of gears are respectively controlled by two stepping motors, and the main lifting rod 3 and the auxiliary lifting rod 7 can jointly adjust the angle of the electromagnetic wave emitting device by setting the rotation direction and the number of turns of the two sets of gears.
In this embodiment, as shown in fig. 2 and fig. 3, the entire active electromagnetic interference suppression device is installed at the pantograph bow angle 5 of the high-speed train, and the auxiliary lifting rod 7 and the lifting rod base 4 thereof can prevent the contact wire from sliding out of the sliding plate area when sliding, so that the problem that the contact wire can slide out of the pantograph bow angle to the area below the pantograph bow when sliding at a high speed is solved, the stability of current collection of the pantograph-catenary system is effectively improved, and the safe and stable operation of the train is well ensured.
Through the design, the invention not only effectively inhibits the electromagnetic interference of the arc of the pantograph net, but also protects the safety of the electric equipment and personnel around the train, and the device has high automation degree, high accuracy and easy operation, and has strong practical value and popularization value.
Claims (6)
1. An active pantograph-catenary arc electromagnetic interference suppression device, comprising:
the device comprises a signal processing unit, a motor control unit, a main lifting motor, an emission control unit, an electromagnetic wave shielding pot (1), an electromagnetic wave shielding pot main rotating rod (2), a main lifting rod (3), a lifting rod base (4), an electromagnetic wave shielding pot auxiliary rotating rod (6), an auxiliary lifting rod (7), an electromagnetic wave sensor (8), an emission device support frame (9), an electromagnetic wave emission device (10), a main lifting rod rack (11), a main lifting rod gear (12), a pantograph slide plate (14), a pantograph slide plate support (15) and a pantograph head support (16);
the signal processing unit is respectively in communication connection with the emission control unit and the motor control unit; the emission control unit is in communication connection with an electromagnetic wave emission device (10); the motor control unit is electrically connected with the main lifting motor respectively; the electromagnetic wave shielding pot (1) is fixedly connected with the electromagnetic wave emitting device (10) through the emitting device support frame (9) and is used for concentrating the electromagnetic waves emitted by the electromagnetic wave emitting device (10) and absorbing the non-cancelable bow net arc electromagnetic interference; one end of the electromagnetic wave shielding pot main rotating rod (2) is fixedly connected with the electromagnetic wave shielding pot (1), and the other end of the electromagnetic wave shielding pot main rotating rod is rotatably connected with one end of the main lifting rod frame (11) and is used for adjusting the rotating angle of the electromagnetic wave transmitting device (10) together with the electromagnetic wave shielding pot auxiliary rotating rod (6); two main lifting rod gears (12) are arranged inside one end of the main lifting rod (3), and the other end of the main lifting rod gears is fixedly connected with the lifting rod base (4); the other end of the main lifting rod rack (11) is trapped between the two main lifting rod gears (12) and is in meshing transmission with the two main lifting rod gears (12); the main elevating motor includes: a first motor and a second motor; the first motor and the second motor are respectively and fixedly connected with a main lifting rod gear (12) and respectively drive one main lifting rod gear (12); the lifting rod base (4) is fixed on a pantograph bow angle (5); one end of the auxiliary lifting rod (7) is fixedly connected with the lifting rod base (4), and the other end of the auxiliary lifting rod is rotatably connected with one end of the electromagnetic wave shielding pot auxiliary rotating rod (6); the other end of the electromagnetic wave shielding pan auxiliary rotating rod (6) is fixedly connected with the electromagnetic wave shielding pan (1); the electromagnetic wave sensor (8) is fixedly connected with the auxiliary lifting rod (7) and is used for collecting pantograph-catenary arc electromagnetic interference data in real time, one end of the pantograph slide plate support (15) is fixedly connected with the pantograph slide plate (14), and the other end of the pantograph slide plate support is fixedly connected with the pantograph head support (16); the pantograph angle (5) is fixed on the pantograph slide plate bracket (15);
the active bow net arc electromagnetic interference suppression device executes the following method:
s1, acquiring bow net arc electromagnetic interference data through an electromagnetic wave sensor (8) and transmitting the data to a signal processing unit;
s2, finding the central point of the bow net arc column through the signal processing unit according to the bow net arc electromagnetic interference data, starting the motor control unit, and adjusting the angle of the electromagnetic wave emitting device (10) until the electromagnetic wave emitting device (10) is over against the central point of the bow net arc column;
s3, starting the electromagnetic wave emitting device (10) to emit electromagnetic waves to the central point of the arc column of the arc net, and generating destructive interference with the electromagnetic interference of the arc net, so as to inhibit the electromagnetic interference of the arc net;
step S3 comprises the following sub-steps:
s31, processing the pantograph-catenary arc electromagnetic interference data through a signal processing unit to obtain real-time frequency, amplitude and phase information of the pantograph-catenary arc electromagnetic interference;
s32, transmitting the real-time frequency, amplitude and phase information of the electromagnetic interference of the pantograph-catenary arc to a transmitting control unit through a signal processing unit;
s33, the electromagnetic wave emitting device (10) is controlled by the emitting control unit to emit electromagnetic waves with the same frequency, the same amplitude and the opposite phase information as those of the pantograph-catenary arc electromagnetic interference, and destructive interference is generated between the electromagnetic waves and the pantograph-catenary arc electromagnetic interference, so that the pantograph-catenary arc electromagnetic interference is suppressed.
2. The active pantograph arc electromagnetic interference suppression device of claim 1, wherein the step S2 comprises the following sub-steps:
s21, based on the pantograph-catenary arc electromagnetic interference data, finding the position with the strongest pantograph-catenary arc electromagnetic interference, namely the central point of the pantograph-catenary arc column through the signal processing unit, and transmitting the position information of the central point of the pantograph-catenary arc column to the motor control unit;
s22, according to the position information of the central point of the arc column of the pantograph net, the rotating direction and the number of turns of the main lifting motor are adjusted through the motor control unit, and the electromagnetic wave emitting device (10) is driven to move through the main lifting motor until the electromagnetic wave emitting device (10) is over against the central point of the arc column of the pantograph net.
3. An active pantograph arc emi suppression device according to claim 1, wherein the pantograph pan carriage (15) comprises: a pantograph slide plate base (151), a slide plate support rod bolt (152), a slide plate support rod (153), a support connecting rod (154), a slide plate support rod base (155) and a pantograph head base bolt (156);
the pantograph slide plate base (151) is fixedly connected with the pantograph slide plate (14) and the pantograph angle (5) respectively; one end of the slide plate support rod (153) is fixedly connected with the pantograph slide plate base (151) through a slide plate support rod bolt (152), and the other end of the slide plate support rod is fixedly connected with one end of a support connecting rod (154); the other end of the supporting connecting rod (154) is fixedly connected with one end of a sliding plate supporting rod base (155); the other end of the sliding plate support rod base (155) is fixedly connected with a pantograph bow support (16) through a bow base bolt (156).
4. An active pantograph arc emi device according to claim 3, wherein said pantograph head support (16) comprises: a pantograph head base (161), a base connecting frame (162), a pantograph head fixing frame (163), a pantograph head connecting rod hole (164), a pantograph head connecting rod bolt (165) and a pantograph head connecting rod (166);
one end of the pantograph head base (161) is fixedly connected with the other end of the sliding plate support rod base (155) through a pantograph head base bolt (156); one end of the base connecting frame (162) is fixedly connected with one side of the middle of the pantograph head base (161); the bow fixing frame (163) is of a U-shaped symmetrical structure, one end of the bow fixing frame is fixedly connected with the other end of the base connecting frame (162), and a bow connecting rod hole (164) and a bow connecting rod bolt (165) which are symmetrical in the same way are fixed on a symmetrical line of the bow fixing frame; screw holes are formed in the symmetry line of the bow head fixing frame (163), and bolt bases are arranged on two sides of the symmetry line; the bow connecting rod bolt (165) is fixedly connected with the bow connecting rod hole (164) through a screw hole and is fixedly connected with the bow fixing frame (163) through a bolt base; the bow connecting rod (166) is fixedly connected with the bow connecting rod bolt (165).
5. The active bow net arc electromagnetic interference suppression device according to claim 1, wherein the ICP material laid on the electromagnetic wave shielding pot (1) is of a type comprising: PAN polyaniline, PPY polypyrrole, and PTH polythiophene.
6. An active pantograph arc electromagnetic interference device as claimed in claim 1, wherein said lifter base (4) is made of SMC composite material.
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| CN204044263U (en) * | 2014-08-20 | 2014-12-24 | 中国铁道科学研究院标准计量研究所 | Pantograph contact line relation testing table |
| US10332260B2 (en) * | 2014-09-15 | 2019-06-25 | Dti Group Limited | Identification of a contact point between a pantograph and a power supply line in an image |
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