CN113517671A - Lightning protection device of water level sensor - Google Patents
Lightning protection device of water level sensor Download PDFInfo
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- CN113517671A CN113517671A CN202111077813.7A CN202111077813A CN113517671A CN 113517671 A CN113517671 A CN 113517671A CN 202111077813 A CN202111077813 A CN 202111077813A CN 113517671 A CN113517671 A CN 113517671A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G13/00—Installations of lightning conductors; Fastening thereof to supporting structure
- H02G13/80—Discharge by conduction or dissipation, e.g. rods, arresters, spark gaps
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/14—Indicating direction of current; Indicating polarity of voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G13/00—Installations of lightning conductors; Fastening thereof to supporting structure
- H02G13/40—Connection to earth
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G13/00—Installations of lightning conductors; Fastening thereof to supporting structure
- H02G13/60—Detecting; Measuring; Sensing; Testing; Simulating
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Abstract
The invention provides a lightning protection device of a water level sensor, which comprises a floating ball type water level sensor, a mounting plate, a lightning protection cover, a lightning stroke detection mechanism, a main control unit and an electric turntable, wherein the lightning stroke detection mechanism comprises an insulating seat, a vertical metal cylinder, an inclined metal cylinder, a current transformer, a first drainage wire and a second drainage wire, the floating ball type water level sensor is arranged on the mounting plate, when lightning strikes, the vertical metal cylinder and the inclined metal cylinder are used as lightning conductors to conduct lightning conduction, the current transformer is arranged in the inclined metal cylinder, the first drainage wire and the second drainage wire both pass through the current transformer, the main control unit can judge the falling point of the lightning according to the current direction generated by the current transformer, when the lightning falls on the inclined metal cylinder, the main control unit can drive the lightning protection cover to rotate through the electric turntable, so that the side which is not struck by the lightning or has fewer lightning times is transferred to the side with more lightning directions, the lightning protection cover can prevent the lightning protection cover from being damaged by multiple times of lightning strikes at the same position.
Description
Technical Field
The invention relates to the technical field of lightning protection, in particular to a lightning protection device of a water level sensor.
Background
The hydraulic engineering buildings for flood-blocking, storing and regulating water flow can be called as reservoirs, the main functions of which include irrigation, flood control and power generation, the water level of the reservoir needs to be monitored constantly when the reservoir is used as an energy storage hydraulic power plant due to the change of seasons, such as rainy seasons and dry seasons, therefore, the existing energy storage reservoir is additionally provided with a water level sensor for real-time monitoring of water level, the common water level sensor is a floating ball type water level sensor, the floating ball type water level sensor comprises a magnetic floating ball, a measuring conduit, a signal unit, an electronic unit, a junction box and a mounting part, the specific gravity of the general magnetic floating ball is less than 0.5, the general magnetic floating ball can float on the liquid level and move up and down along the measuring conduit, the measuring element is installed in the measuring conduit, and can convert the measured liquid level signal into a resistance signal proportional to the liquid level change under the action of external magnetism, so as to realize the liquid level measurement.
When the floating ball type water level sensor detects the water level, the measuring conduit of the floating ball type water level sensor is exposed above the water surface, and the electric elements of the floating ball type water level sensor are fixed on the water surface through the mounting piece, in thunderstorm weather, lightning stroke often occurs, if the lightning falls on an electrical element or a measuring conduit of the floating ball type water level sensor, the floating ball type water level sensor cannot normally detect the water level, so that the water level height cannot be detected or water level detection data is incorrect, therefore, the normal and effective dispatching of energy storage and power generation can not be carried out, the lightning protection of the floating ball type water level sensor is basically carried out through the external shell at present, the lightning protection is only simply carried out by adopting the lightning protection mode of the external shell, the lightning direction is not detected, in a thunderstorm season, the same position of the external shell is possibly damaged by multiple lightning strikes, so that lightning protection cannot be performed.
Disclosure of Invention
Therefore, the lightning protection device of the water level sensor is used for lightning protection in a drainage mode, can determine the direction of lightning, changes the direction of the lightning protection cover and ensures the lightning protection effect.
The technical scheme of the invention is realized as follows:
a lightning protection device of a water level sensor comprises a floating ball type water level sensor, a mounting plate, a lightning protection cover, a lightning stroke detection mechanism, a main control unit and an electric rotary table, wherein the mounting plate is arranged on the inner side wall of a reservoir, a mounting groove is formed in the upper surface of the mounting plate, the floating ball type water level sensor comprises a magnetic floating ball, a measuring guide pipe and a Hall sensor, the measuring guide pipe vertically penetrates through the mounting groove, the magnetic floating ball is arranged in the part, below the mounting plate, of the measuring guide pipe, and the Hall sensor is arranged at the top in the measuring guide pipe; the electric rotary table is arranged in the mounting groove, the bottom of the lightning protection cover is embedded into the mounting groove and is connected with the top surface of the electric rotary table, and the part of the measuring guide pipe, which is positioned at the top of the mounting groove, is positioned inside the lightning protection cover; the lightning stroke detection mechanism comprises an insulating base, a vertical metal cylinder, an inclined metal cylinder, a current transformer, a first drainage wire and a second drainage wire, wherein the insulating base is arranged on the top surface of the lightning protection cover, the vertical metal cylinder is arranged on the top surface of the insulating base, the inclined metal cylinder is uniformly arranged on the side wall of the insulating base, one end of the inclined metal cylinder inclines downwards and is connected with the top surface of the lightning protection cover, the current transformer is arranged in the inclined metal cylinder and is close to the vertical metal cylinder, one end of the first drainage wire is connected with the inner wall of the vertical metal cylinder, the other end of the first drainage wire penetrates into the inclined metal cylinder through the insulating base and is electrically connected with the ground through the current transformer, one end of the second drainage wire is connected with the inner wall of one end, far away from the vertical metal cylinder, of the inclined metal cylinder, and the other end of the second drainage wire is connected with the ground after penetrating through the current transformer; the main control unit is arranged on the inner wall of the lightning protection cover and is respectively and electrically connected with the electric turntable, the Hall sensor and the current transformer.
Preferably, lightning protection cover includes first barrel, second barrel and elevating system, first barrel bottom is embedded into the mounting groove to be connected with electric turntable top surface, inside first barrel lateral wall was stretched into to second barrel bottom, its top seal, insulating seat and slope metal cylinder are connected with second barrel top surface, elevating system includes electric putter and kickboard, the kickboard sets up at second barrel outer wall, electric putter sets up at first barrel outer wall, and its output shaft is connected with the kickboard bottom surface, the main control unit is connected with the electric putter electricity.
Preferably, thunderbolt detection mechanism still includes becket and electrically conductive head, the becket sets up at the mounting groove inner wall, electrically conductive head sets up on first barrel lateral wall to with the becket contact, the becket passes through the earth connection and is connected with the earth electricity of reservoir one side, first drainage wire and second drainage wire are connected with electrically conductive head electricity through inside the first barrel lateral wall and the inside second barrel lateral wall.
Preferably, still include positioning mechanism, positioning mechanism includes and bumps pearl and piezoceramics piece with the constant head tank, elasticity that slope metal cylinder quantity is the same, the constant head tank evenly sets up at the mounting groove inner wall, piezoceramics piece sets up inside the constant head tank, elasticity bumps the pearl and evenly sets up on the outer lateral wall of first barrel, electric rotary table drives the rotatory messenger elasticity of lightning protection cover and bumps the pearl and imbed in the constant head tank, the main control unit is connected with piezoceramics piece electricity.
Preferably, the first cylinder side wall and the second cylinder side wall are formed by bonding a plurality of arc-shaped metal plates through insulating glue, the number of the arc-shaped metal plates of the first cylinder and the number of the arc-shaped metal plates of the second cylinder are the same as that of the inclined metal cylinders, and the end parts of the inclined metal cylinders are connected with the tops of the arc-shaped metal plates.
Preferably, a metal shielding net is arranged in the arc-shaped metal plate.
Preferably, the main control unit comprises an accumulation unit, a current direction identification unit and a control unit, the current direction identification unit is electrically connected with the current transformer, and the control unit is electrically connected with the accumulation unit, the current direction identification unit, the electric turntable and the hall sensor respectively.
Preferably, the main control unit further comprises a period calculation unit, the period calculation unit is electrically connected with the control unit, and the control unit drives the electric turntable to drive the lightning protection cover to rotate after the period stored in the period calculation unit is finished.
Preferably, the main control unit further comprises a comparison unit and a storage unit, a lightning stroke frequency threshold value born by the inclined metal cylinder in a single period is stored in the comparison unit, the control unit transmits the actual lightning stroke frequency to the storage unit according to the data of the current direction identification unit in a period set by the period calculation unit, the comparison unit reads the actual lightning stroke frequency in the storage unit and compares the actual lightning stroke frequency with the lightning stroke frequency threshold value, and sends a comparison result to the control unit, the control unit drives the electric turntable to drive the lightning protection cover to rotate when the actual lightning stroke frequency is greater than the lightning stroke frequency threshold value in the comparison result, and the control unit refreshes the data stored in the storage unit after the period set by the period calculation unit is over or the electric turntable is driven.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a lightning protection device of a water level sensor, which is used for lightning protection of a part of a floating ball type water level sensor above a mounting plate, wherein a lightning protection cover is covered outside a measuring guide pipe, and a vertical metal cylinder and an inclined metal cylinder are arranged at the top of the lightning protection cover.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only preferred embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic structural view of a lightning protection device of a water level sensor according to the present invention;
FIG. 2 is a sectional view of a lightning protection device of a water level sensor according to the present invention;
FIG. 3 is an enlarged view taken at A in FIG. 2;
FIG. 4 is a schematic view showing an internal structure of an inclined metal cylinder of a lightning protection device of a water level sensor according to the present invention;
FIG. 5 is a schematic view of a lightning protection device of a water level sensor according to the present invention;
in the figure, 1 is an installation plate, 2 is a main control unit, 3 is an electric turntable, 4 is an installation groove, 5 is a magnetic floating ball, 6 is a measurement guide pipe, 7 is a hall sensor, 8 is an insulation seat, 9 is a vertical metal cylinder, 10 is an inclined metal cylinder, 11 is a current transformer, 12 is a first drainage wire, 13 is a second drainage wire, 14 is a first cylinder, 15 is a second cylinder, 16 is an electric push rod, 17 is a push plate, 18 is a metal ring, 19 is a conductive head, 20 is a ground wire, 21 is a positioning groove, 22 is an elastic collision bead, 23 is a piezoelectric ceramic plate, 24 is an arc-shaped metal plate, 25 is a metal shielding net, 26 is an accumulation unit, 27 is a current direction identification unit, 28 is a control unit, 29 is a period calculation unit, 30 is a comparison unit, and 31 is a storage unit.
Detailed Description
For a better understanding of the technical content of the present invention, a specific embodiment is provided below, and the present invention is further described with reference to the accompanying drawings.
Referring to fig. 1 to 5, the lightning protection device of a water level sensor provided by the invention comprises a floating ball type water level sensor, a mounting plate 1, a lightning protection cover, a lightning stroke detection mechanism, a main control unit 2 and an electric rotary table 3, wherein the mounting plate 1 is arranged on the inner side wall of a reservoir, a mounting groove 4 is arranged on the upper surface of the mounting plate, the floating ball type water level sensor comprises a magnetic floating ball 5, a measuring conduit 6 and a hall sensor 7, the measuring conduit 6 vertically penetrates through the mounting groove 4, the magnetic floating ball 5 is arranged in the part, below the mounting plate 1, of the measuring conduit 6, and the hall sensor 7 is arranged at the top in the measuring conduit 6; the electric rotary table 3 is arranged in the mounting groove 4, the bottom of the lightning protection cover is embedded into the mounting groove 4 and is connected with the top surface of the electric rotary table 3, and the part of the measuring conduit 6, which is positioned at the top of the mounting groove 4, is positioned inside the lightning protection cover; the lightning stroke detection mechanism comprises an insulating base 8, a vertical metal cylinder 9, an inclined metal cylinder 10, a current transformer 11, a first drainage wire 12 and a second drainage wire 13, the insulating seat 8 is arranged on the top surface of the lightning protection cover, the vertical metal cylinder 9 is arranged on the top surface of the insulating seat 8, the inclined metal cylinders 10 are uniformly arranged on the side wall of the insulating seat 8, one end of the current transformer is inclined downwards and is connected with the top surface of the lightning protection cover, the current transformer 11 is arranged inside the inclined metal cylinder 10, and is arranged close to the vertical metal cylinder 9, one end of the first drainage wire 12 is connected with the inner wall of the vertical metal cylinder 9, the other end penetrates into the inclined metal cylinder 10 through the insulating seat 8, one end of the second drainage wire 13 is connected with the inner wall of one end of the inclined metal cylinder 10 far away from the vertical metal cylinder 9, and the other end of the second drainage wire passes through the current transformer 11 and then is connected with the earth electricity; the main control unit 2 is arranged on the inner wall of the lightning protection cover and is respectively and electrically connected with the electric turntable 3, the Hall sensor 7 and the current transformer 11.
The invention relates to a lightning protection device of a water level sensor, which is used for lightning protection of the floating ball type water level sensor, wherein a measuring conduit 6 of the floating ball type water level sensor penetrates through a mounting groove 4 of a mounting plate 1 and then extends into the water of a reservoir, a magnetic floating ball 5 is arranged at the lower end of the measuring conduit 6, a Hall sensor 7 is arranged at the upper end of the measuring conduit 6, the magnetic floating ball 5 can change along with the change of the liquid level of the reservoir, the change of the height of the magnetic floating ball 5 can change the magnetic field intensity detected by the Hall sensor 7, a main control unit 2 can convert the data transmitted by the Hall sensor 7 into the height of the liquid level of the reservoir to monitor the water level of the reservoir, and in order to prevent the part of the measuring conduit 6 above the mounting plate 1 from being struck by lightning, the lightning protection cover is arranged on the top surface of the mounting plate 1, and covers the measuring conduit 6 inside the lightning protection cover, the lightning is prevented from directly falling on the measuring pipe 6, and the normal use of the measuring pipe 6 is ensured.
The top of the lightning protection cover is provided with an insulating base 8 and a vertical metal cylinder 9, the vertical metal cylinder 9 is arranged at the top of the insulating base 8, the side wall of the insulating base 8 is uniformly provided with a plurality of inclined metal cylinders 10, the number of the inclined metal cylinders 10 is 4 or 8, different directions are represented, the vertical metal cylinder 9 and the inclined metal cylinders 10 can be equally used as lightning rods, when direct lightning strikes occur, lightning can fall on the vertical metal cylinder 9, the vertical metal cylinder 9 can conduct lightning current to the ground, when the lightning falls off in an inclined manner, the lightning can fall on the inclined metal cylinders 10, the inclined metal cylinders 10 can conduct the lightning current to the ground, the lightning can be prevented from directly falling on the lightning protection cover, and the lightning protection cover is prevented from being damaged by lightning strikes.
In the season of thunderstorms, the number of thunder will also increase, so the number of thunder falling on the vertical metal cylinder 9 and the inclined metal cylinder 10 will also increase, for the thunder falling on the vertical metal cylinder 9, because the vertical metal cylinder 9 is higher, the falling thunder will not affect the lightning protection cover, and for the thunder falling on the inclined metal cylinder 10, there is a risk of falling on the lightning protection cover, namely the thunder falling on the inclined metal cylinder 10 may fall on the lightning protection cover, therefore, the invention drives the rotation of the lightning protection cover by identifying the position and direction of the lightning falling point, to avoid the damage of the lightning protection cover caused by multiple times of lightning strikes, wherein the current transformer 11 is arranged in the inclined metal cylinder 10, the second current leading wire 13 and the first current leading wire 12 are respectively arranged in the inclined metal cylinder 10 and the vertical metal cylinder 9, the first drainage wire 12 and the second drainage wire 13 are connected with the ground after passing through the current transformer 11, and the difference is that the first drainage wire 12 and the second drainage wire 13 pass through the current transformer 11 from opposite directions, so that when a lightning strike occurs, the lightning current falling on the vertical metal cylinder 9 can be transmitted to the ground along the first drainage wire 12, and the lightning current falling on the inclined metal cylinder 10 can be transmitted to the ground along the second drainage wire 13, and the current transmission directions on the first drainage wire 12 and the second drainage wire 13 are different, so that the current directions induced and generated by the current transformer 11 are different, the main control unit 2 judges whether the lightning falls on the vertical metal cylinder 9 or the inclined metal cylinder 10 according to the current direction transmitted by the current transformer 11, and when the lightning falls on the inclined metal cylinder 10, the lightning direction can be judged according to the position of the transmitted current transformer 11, then the main control unit 2 drives the electric turntable 3 to drive the lightning protection cover, the insulating base 8, the vertical metal cylinder 9 and the inclined metal cylinder 10 to synchronously rotate, so that one side which is not struck by lightning rotates to one side which is struck by lightning, the condition that the same position is struck by multiple lightning is avoided, and the lightning protection cover is prevented from being damaged.
Preferably, lightning protection cover includes first barrel 14, second barrel 15 and elevating system, first barrel 14 bottom is embedded into mounting groove 4 to be connected with 3 top surfaces of electric turntable, inside first barrel 14 lateral walls was stretched into to second barrel 15 bottom, its top was sealed, insulating seat 8 and slope metal cylinder 10 are connected with 15 top surfaces of second barrel, elevating system includes electric putter 16 and pushing plate 17, pushing plate 17 sets up at 15 outer walls of second barrel, electric putter 16 sets up at first barrel 14 outer walls, and its output shaft is connected with pushing plate 17 bottom surface, main control unit 2 is connected with electric putter 16 electricity.
When the thunder and lightning fell on the slope metal cylinder 10, the vertical metal cylinder 9 has been walked around to the thunder and lightning on behalf of, and main control unit 2 still can drive first barrel 14 through elevating system and rise when controlling electric turntable 3 rotatory, makes the whole height increase of vertical metal cylinder 9, improves the probability that the thunder and lightning fell on vertical metal cylinder 9.
When the height of the vertical metal cylinder 9 is adjusted, the main control unit 2 drives the pushing plate 17 to lift through driving the electric push rod 16, so that the pushing plate 17 can drive the first cylinder 14 to move along the second cylinder 15 to adjust the overall height.
Preferably, the lightning stroke detection mechanism further comprises a metal ring 18 and a conductive head 19, the metal ring 18 is arranged on the inner wall of the mounting groove 4, the conductive head 19 is arranged on the side wall of the first cylinder 14 and is in contact with the metal ring 18, the metal ring 18 is electrically connected with the earth on one side of the reservoir through a grounding wire 20, and the first drainage wire 12 and the second drainage wire 13 are electrically connected with the conductive head 19 through the inside of the side wall of the first cylinder 14 and the inside of the side wall of the second cylinder 15.
When lightning strike occurs, lightning current can be conveyed to the conductive head 19 through the first drainage wire 12 or the second drainage wire 13, flows into the metal ring 18 through the conductive head 19, and then flows into the ground through the ground wire 20 to achieve lightning protection, and when the electric rotary table 3 drives the lightning protection cover to rotate, the conductive head 19 can be in contact with the metal ring 18, so that the lightning current can be smoothly poured into the ground.
Preferably, still include positioning mechanism, positioning mechanism includes and bumps pearl 22 and piezoceramics piece 23 with the same constant head tank 21 of slope metal cylinder 10 quantity, elasticity, constant head tank 21 evenly sets up at 4 inner walls of mounting groove, piezoceramics piece 23 sets up inside constant head tank 21, elasticity bumps pearl 22 evenly sets up on first barrel 14 lateral wall, electric rotary table 3 drives the rotatory messenger elasticity of lightning protection cover and bumps pearl 22 and imbed in constant head tank 21, main control unit 2 is connected with piezoceramics piece 23 electricity.
For the main control unit 2, the number of times that each inclined metal cylinder 10 can be struck by lightning is stored in the main control unit 2, the main control unit 2 can rotate the inclined metal cylinder 10 with less number of times of struck by lightning to the direction of more generated lightning within a certain time, and in order to realize the positioning of the rotation of the inclined metal cylinder 10, the invention is provided with a positioning mechanism, the outer side wall of the first cylinder body 14 below each inclined metal cylinder 10 is provided with an elastic collision bead 22, the inner wall of the installation groove 4 is uniformly provided with positioning grooves 21, the piezoelectric ceramic sheet 23 is arranged in the positioning grooves 21, before the main control unit 2 drives the lightning protection cover to rotate, the positions of the inclined metal cylinder 10 to be replaced and the inclined metal cylinder 10 to be replaced are firstly determined, namely the number of the inclined metal cylinders 10 spaced between the two is obtained, then the main control unit 2 drives the electric turntable 3 to drive the lightning protection cover to rotate, in the rotation process of the lightning protection cover, the elastic collision bead 22 moves out of the initial positioning groove 21, when the lightning protection cover moves to a different positioning groove 21, the elastic collision bead 22 is popped out of the positioning groove 21 to contact with the piezoelectric ceramic piece 23, so that the piezoelectric ceramic piece 23 generates an electric signal, and the main control unit 2 judges whether the inclined metal cylinder 10 to be replaced moves to the initial position of the inclined metal cylinder 10 to be replaced or not according to the frequency of the electric signal sent by the piezoelectric ceramic piece 23.
Preferably, the side wall of the first cylinder 14 and the side wall of the second cylinder 15 are formed by bonding a plurality of arc-shaped metal plates 24 through insulating glue, the number of the arc-shaped metal plates 24 of the first cylinder 14 and the number of the arc-shaped metal plates 24 of the second cylinder 15 are the same as that of the inclined metal cylinder 10, the end part of the inclined metal cylinder 10 is connected with the top of the arc-shaped metal plates 24, and a metal shielding net 25 is arranged in the arc-shaped metal plates 24.
The lightning directly falls on the lightning protection cover, which is the same as the lightning falls on the inclined metal cylinder 10, in addition to the vertical metal cylinder 9 and the inclined metal cylinder 10, and for this reason, the first cylinder 14 and the second cylinder 15 are provided as a structure formed by splicing a plurality of arc-shaped metal plates 24, and the splicing parts are bonded by insulating glue to separate the electric connection among the arc-shaped metal plates 24, while each inclined metal cylinder 10 is connected with the arc-shaped metal plates 24 of the second cylinder 15 in a one-to-one correspondence, when the lightning strikes on the side wall of the first cylinder 14 or the second cylinder 15, the lightning current is transmitted to the inclined metal cylinder 10 along the arc-shaped metal plate 24, the detection of the lightning direction and the drainage of the lightning are performed by the inclined metal cylinder 10, the metal shielding net 25 is disposed in the arc-shaped metal plate 24 to prevent the magnetic field generated by external lightning strike or other magnetic fields from affecting the inside.
Preferably, the main control unit 2 includes an integrating unit 26, a current direction identifying unit 27, and a control unit 28, the current direction identifying unit 27 is electrically connected to the current transformer 11, and the control unit 28 is electrically connected to the integrating unit 26, the current direction identifying unit 27, the electric turntable 3, and the hall sensor 7, respectively.
When lightning strikes occur on the vertical metal cylinder 9 or the inclined metal cylinder 10, lightning current can be transmitted on the first current-conducting wire 12 or the second current-conducting wire 13, and after the current transformer 11 generates induced current, the induced current signal is transmitted to the current direction recognition unit 27, the current direction recognition unit 27 recognizes the current direction and transmits the current direction to the control unit 28, the control unit 28 can recognize the lightning landing point according to the current direction, when the lightning strikes the inclined metal cylinders 10, the control unit 28 accumulates the actual number of lightning strikes stored in the accumulation unit 26, the accumulation unit 26 is used to independently store the actual number of lightning strikes of all the inclined metal cylinders 10, the control unit 28 can thus drive the rotation of the electric turntable 3 according to the data stored in the accumulation unit 26, moving the tilted metal cylinder 10 with a smaller number of lightning strikes to the location currently suffering from a lightning strike.
Preferably, the main control unit 2 further includes a period calculating unit 29, the period calculating unit 29 is electrically connected to the control unit 28, and the control unit 28 drives the electric turntable 3 to drive the lightning protection cover to rotate after the period stored in the period calculating unit 29 is over.
The period calculation unit 29 stores a fixed period, which may be one week, half month or one week, and after the period is over, the control unit 28 may transfer the tilted metal cylinders 10 with the least number of lightning strikes to the tilted metal cylinders 10 where the number of lightning strikes has traced back according to the number of lightning strikes to all the tilted metal cylinders 10.
Preferably, the main control unit 2 further includes a comparison unit 30 and a storage unit 31, the comparison unit 30 stores a lightning strike number threshold value born by the inclined metal cylinder 10 in a single period, the control unit 28 transmits the actual lightning strike number to the storage unit 31 according to the data of the current direction identification unit 27 in a period set by the period calculation unit 29, the comparison unit 30 reads the actual lightning strike number in the storage unit 31 and compares the actual lightning strike number with the lightning strike number threshold value, and sends the comparison result to the control unit 28, the control unit 28 drives the electric turntable 3 to drive the lightning protection cover to rotate when the actual lightning strike number is greater than the lightning strike number threshold value in the comparison result, and the control unit 28 refreshes the data stored in the storage unit 31 after the period set by the period calculation unit 29 is over or the electric turntable 3 is driven.
The invention provides a threshold limiting function for the rotation of the lightning protection cover, in addition to being performed after the end of the set period, first a maximum threshold value for the number of lightning strikes is stored in the comparison unit 30, in a period when a lightning strike occurs on the tilted metal cylinder 10, the control unit 28 will store the actual number of lightning strikes in the storage unit 31, the comparison unit 30 can read the actual number of lightning strikes in the storage unit 31, and compares the actual number of lightning strikes with the threshold value of the number of lightning strikes stored in the electric turntable, if the actual number of lightning strikes is greater than the threshold value of the number of lightning strikes, the control unit 28 drives the electric turntable 3 to drive the lightning protection cover to rotate so as to change the position of the lightning protection cover, that is, when a period is not finished, if a certain inclined metal cylinder 10 is struck by lightning for a large number of times, the control unit 28 may drive the electric turntable 3 to drive the lightning protection cover to rotate, that is, the adjustment priority performed when the number of times is greater than the threshold value is greater than the adjustment performed after the period is finished.
After the control unit 28 drives the electric turntable 3 when the actual lightning stroke number is greater than the threshold value of the lightning stroke number, the data stored in the storage unit 31 may be cleared and refreshed, so as to perform a new threshold value adjusting process.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. The lightning protection device of the water level sensor is characterized by comprising a floating ball type water level sensor, a mounting plate, a lightning protection cover, a lightning stroke detection mechanism, a main control unit and an electric rotary table, wherein the mounting plate is arranged on the inner side wall of a reservoir, a mounting groove is formed in the upper surface of the mounting plate, the floating ball type water level sensor comprises a magnetic floating ball, a measuring guide pipe and a Hall sensor, the measuring guide pipe vertically penetrates through the mounting groove, the magnetic floating ball is arranged in the part, below the mounting plate, of the measuring guide pipe, and the Hall sensor is arranged at the top in the measuring guide pipe; the electric rotary table is arranged in the mounting groove, the bottom of the lightning protection cover is embedded into the mounting groove and is connected with the top surface of the electric rotary table, and the part of the measuring guide pipe, which is positioned at the top of the mounting groove, is positioned inside the lightning protection cover; the lightning stroke detection mechanism comprises an insulating base, a vertical metal cylinder, an inclined metal cylinder, a current transformer, a first drainage wire and a second drainage wire, wherein the insulating base is arranged on the top surface of the lightning protection cover, the vertical metal cylinder is arranged on the top surface of the insulating base, the inclined metal cylinder is uniformly arranged on the side wall of the insulating base, one end of the inclined metal cylinder inclines downwards and is connected with the top surface of the lightning protection cover, the current transformer is arranged in the inclined metal cylinder and is close to the vertical metal cylinder, one end of the first drainage wire is connected with the inner wall of the vertical metal cylinder, the other end of the first drainage wire penetrates into the inclined metal cylinder through the insulating base and is electrically connected with the ground through the current transformer, one end of the second drainage wire is connected with the inner wall of one end, far away from the vertical metal cylinder, of the inclined metal cylinder, and the other end of the second drainage wire is connected with the ground after penetrating through the current transformer; the main control unit is arranged on the inner wall of the lightning protection cover and is respectively and electrically connected with the electric turntable, the Hall sensor and the current transformer.
2. The lightning protection device for the water level sensor according to claim 1, wherein the lightning protection cover comprises a first cylinder, a second cylinder and a lifting mechanism, the bottom of the first cylinder is embedded into the mounting groove and connected with the top surface of the electric turntable, the bottom of the second cylinder extends into the side wall of the first cylinder, the top of the second cylinder is sealed, the insulating base and the inclined metal cylinder are connected with the top surface of the second cylinder, the lifting mechanism comprises an electric push rod and a push plate, the push plate is arranged on the outer wall of the second cylinder, the electric push rod is arranged on the outer wall of the first cylinder, an output shaft of the electric push rod is connected with the bottom surface of the push plate, and the main control unit is electrically connected with the electric push rod.
3. The lightning protection device for the water level sensor according to claim 2, wherein the lightning strike detection mechanism further comprises a metal ring and a conductive head, the metal ring is disposed on the inner wall of the mounting groove, the conductive head is disposed on the side wall of the first cylinder and contacts with the metal ring, the metal ring is electrically connected to the ground on one side of the reservoir through a ground wire, and the first and second drainage wires are electrically connected to the conductive head through the inside of the side wall of the first cylinder and the inside of the side wall of the second cylinder.
4. The lightning protection device of a water level sensor according to claim 2, further comprising a positioning mechanism, wherein the positioning mechanism comprises positioning grooves, elastic collision beads and piezoelectric ceramic pieces, the number of the positioning grooves is the same as that of the inclined metal cylinders, the positioning grooves are uniformly arranged on the inner wall of the installation groove, the piezoelectric ceramic pieces are arranged inside the positioning grooves, the elastic collision beads are uniformly arranged on the outer side wall of the first cylinder, the electric rotary table drives the lightning protection cover to rotate, so that the elastic collision beads are embedded into the positioning grooves, and the main control unit is electrically connected with the piezoelectric ceramic pieces.
5. The lightning protection device for the water level sensor according to claim 2, wherein the first cylinder side wall and the second cylinder side wall are formed by bonding a plurality of arc-shaped metal plates through insulating glue, the number of the arc-shaped metal plates of the first cylinder and the number of the arc-shaped metal plates of the second cylinder are the same as that of the inclined metal cylinder, and the end part of the inclined metal cylinder is connected with the top of the arc-shaped metal plates.
6. The lightning protection device for the water level sensor according to claim 5, wherein a metal shielding net is arranged in the arc-shaped metal plate.
7. The lightning protection device for the water level sensor according to claim 1, wherein the main control unit comprises an accumulation unit, a current direction identification unit and a control unit, the current direction identification unit is electrically connected with the current transformer, and the control unit is electrically connected with the accumulation unit, the current direction identification unit, the electric turntable and the hall sensor respectively.
8. The lightning protection device of a water level sensor according to claim 7, wherein the main control unit further comprises a period calculation unit, the period calculation unit is electrically connected with the control unit, and the control unit drives the electric turntable to drive the lightning protection cover to rotate after the period stored in the period calculation unit is finished.
9. The lightning protection device for a water level sensor according to claim 8, the main control unit also comprises a comparison unit and a storage unit, the comparison unit internally stores a lightning stroke frequency threshold value born by the inclined metal cylinder in a single period, the control unit transmits the actual lightning stroke number to the storage unit according to the data of the current direction identification unit in a period set by the period calculation unit, the comparison unit reads the actual lightning stroke times in the storage unit and compares the actual lightning stroke times with a lightning stroke time threshold value, and sends the comparison result to the control unit, the control unit drives the electric turntable to drive the lightning protection cover to rotate when the actual lightning strike frequency is larger than the threshold value of the lightning strike frequency, and the control unit refreshes the data stored in the storage unit after one period set by the period calculation unit is finished or the electric turntable is driven.
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