CN114277706A - Self-adaptive control height limiting device based on magneto-rheological - Google Patents
Self-adaptive control height limiting device based on magneto-rheological Download PDFInfo
- Publication number
- CN114277706A CN114277706A CN202210075460.5A CN202210075460A CN114277706A CN 114277706 A CN114277706 A CN 114277706A CN 202210075460 A CN202210075460 A CN 202210075460A CN 114277706 A CN114277706 A CN 114277706A
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- China
- Prior art keywords
- metal shell
- height limiting
- limiting device
- conductive metal
- magnetic
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F13/00—Arrangements for obstructing or restricting traffic, e.g. gates, barricades ; Preventing passage of vehicles of selected category or dimensions
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
- H01F7/0273—Magnetic circuits with PM for magnetic field generation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/20—Electromagnets; Actuators including electromagnets without armatures
- H01F7/202—Electromagnets for high magnetic field strength
Abstract
The invention relates to a magnetorheological-based self-adaptive control height limiting device, which comprises steel upright columns arranged on the left side and the right side, wherein a cross beam is arranged at the top ends of the upright columns, a rotatable magnetic-conducting metal shell is arranged on the cross beam, a stop plate is connected below the magnetic-conducting metal shell, a permanent magnet ring fixed with the cross beam is arranged in the magnetic-conducting metal shell, and an excitation coil is fixedly arranged on the inner wall surface, far away from the cross beam, in the magnetic-conducting metal shell; a sealing ring is coaxially arranged in the magnetic conductive metal shell, a sealing cavity is defined by the sealing ring, the inner wall of the magnetic conductive metal shell, the permanent magnet ring or the fixing piece and the excitation coil, and magnetorheological fluid is filled in the sealing cavity; the stop plate is provided with a speed switch with a time delay function, the height limiting device also comprises a direct current power supply, and the direct current power supply, the speed switch and the excitation coil are connected into a current loop through a lead. The invention improves the defects of the steel frame height limiting rod and the flexible height limiting rod, can change the rotation resistance of the stop plate according to whether the vehicle speed reaches a set value, and ensures that the vehicle is stopped when the vehicle speed is lower and can safely pass when the vehicle speed is higher.
Description
Technical Field
The invention belongs to the field of civil traffic engineering, and particularly relates to a magnetorheological-based adaptive control height limiting device.
Background
The height limiting rod is often arranged on roads and bridges with low bearing capacity and long new construction or service time, is mainly used for limiting the passing of ultrahigh and heavy-duty vehicles, and plays roles in protecting the roads and bridges and guaranteeing the driving safety. At present, China has no specific standard for the height and width, the moving device, the color, the material and the like of the height limiting rod, and the height limiting rod is mostly of a firm steel frame structure under the common condition, and part of the height limiting rod is also formed by vertically hanging a steel plate or a rubber material and the like below a cross rod.
Practical application effects show that although the steel frame structure height limiting rod can effectively limit the passing of ultrahigh vehicles, when the warning of the height limiting rod is not obvious or a driver cannot find the warning in time, the vehicles easily impact the height limiting rod at a higher speed, so that the vehicles and the height limiting rod are damaged and block the traffic, and in case of serious conditions, the personal safety of the driver and passengers is endangered, and serious life and property loss is caused; although the flexible height-limiting rod can effectively prevent traffic accidents and traffic jams caused by high-speed collision rods, when a driver has a lucky psychology, the driver can forcibly pass through the flexible height-limiting rod hung with a steel plate or a rubber material only by slowing down the speed of the vehicle. Therefore, the flexible height-limiting rod cannot effectively limit the height under certain conditions, and damage to the road and bridge caused by an ultrahigh vehicle is possible.
Disclosure of Invention
The invention aims to provide an adaptive control magnetorheological height limiting device capable of automatically adjusting the impact force according to the change of the vehicle speed, so as to solve the problems of traffic accidents and traffic jam caused by the fact that a steel frame structure height limiting rod is easy to generate impact in the prior art and simultaneously solve the problem that a flexible height limiting rod cannot limit the height of a low-speed vehicle.
In order to achieve the purpose, the self-adaptive control height limiting device based on magneto-rheological property adopts the following technical scheme: a self-adaptive control height limiting device based on magneto-rheological comprises a steel upright column, a steel transverse beam, a magnetic field sensor and a magnetic field sensor, wherein the left side and the right side of the self-adaptive control height limiting device are respectively provided with the steel upright column, and the top end of each upright column is fixedly connected with a cylindrical steel transverse beam; one or more annular magnetic metal shells capable of rotating around the axis of the cross beam are installed at equal intervals along the length direction of the cross beam, the magnetic metal shells are connected with the cross beam through rolling bearings, annular grooves are radially carved in the magnetic metal shells, a non-magnetic annular base is fixedly installed on the cross beam in the annular grooves of the magnetic metal shells, an annular permanent magnet is fixedly installed on the outer peripheral surface of the annular base, and excitation coils are coaxially and fixedly wound on the inner wall surface, far away from the cross beam, in the annular grooves of the magnetic metal shells; gaps are reserved between the magnet exciting coil and the permanent magnet in the radial direction and between the permanent magnet and the magnetic metal shell annular groove in the axial direction; coaxial annular sealing rings are filled between the inner surface of the annular groove of the magnetic conductive metal shell and the outer surfaces of two sides of the annular base, a sealing cavity is defined by the outer surfaces of the sealing rings, the inner wall of the annular groove of the magnetic conductive metal shell, the permanent magnet and the excitation coil, and magnetorheological fluid is filled in the sealing cavity; a rectangular rubber stop plate is fixedly arranged right below the outer peripheral surface of the magnetic metal shell through a round steel pipe; a speed switch with a time delay function is arranged on the lower left of the surface of the rectangular rubber stop plate, two leads are connected to the outside of the speed switch, one lead is connected with a direct-current power supply arranged below the cross beam, the other lead is connected with a joint on the outermost layer of the excitation coil, and a joint on the innermost layer of the excitation coil is connected with the direct-current power supply; the direct current power supply, the speed switch, the excitation coil and the lead wire form a complete self-adaptive control current loop together.
The magnetic conductive metal shell is rotatably arranged on the cross beam through a bearing.
The non-magnetic annular base is made of stainless steel.
The direct current power supply can be charged by a solar cell panel and also can be supplied with power by an alternating current power supply.
The magnetic conductive metal shell is made of electrician pure iron DT 4.
The speed sensor in the speed switch can receive the pulse frequency generated by the ultrahigh vehicle to be monitored, has a time delay function and can be automatically disconnected after being electrified for a period of time.
The invention has the beneficial effects that: under the working state, the magnet exciting coil, the direct-current power supply and the speed switch are connected with a stroke self-adaptive control current loop through conducting wires, and a speed sensor in the speed switch can receive the pulse frequency generated by the ultrahigh vehicle to be monitored. When the tested ultrahigh vehicle is ready to be forced to pass through the height limiting device at a low speed, the pulse frequency generated by the tested ultrahigh vehicle is less than the set frequency of the speed switch, the speed switch is switched off, the magnetic field excited by the permanent magnet ring is densely distributed in the magnetorheological fluid, the shear strength of the magnetorheological fluid is high, the magnetic conductive metal shell and the rectangular rubber baffle plate are fixed on the cross beam and cannot rotate, and therefore the ultrahigh vehicle cannot pass through. When the tested ultrahigh vehicle approaches the height limiting device at a high speed due to negligence, the pulse frequency generated by the device is greater than the set frequency of the speed switch, the speed switch is closed, the current is generated in the self-adaptive control current loop, the magnetic field generated after the excitation coil is electrified and the magnetic field generated by the permanent magnet ring are mutually offset, the shearing yield strength of the magnetorheological fluid in the sealed cavity is almost zero under the condition of no magnetic field, the magnetic conductive metal shell can freely rotate around the cross beam along with the rectangular rubber stop plate, and the vehicle can safely pass through the device. After the impact is finished, the rectangular rubber stop plate is restored to the original position due to the self-weight action during the delay of the speed switch, and the rectangular rubber stop plate continues to work normally. Meanwhile, the defects of the steel frame structure height limiting rod and the flexible height limiting rod are overcome.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of an adaptive control magneto-rheological height limiting device of the present invention;
fig. 2 is a schematic cross-sectional view of the internal structure of the magnetic conductive metal casing in fig. 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
The invention discloses an embodiment of a magnetorheological-based adaptive control height limiting device, which comprises the following steps: as shown in fig. 1 and 2, the adaptive control magnetorheological height limiting device comprises a steel upright post 1 respectively arranged at the left side and the right side, and a cylindrical steel beam 2 fixedly connected to the top end of the upright post 1; one or more annular magnetic metal shells 3 capable of rotating around the axis of the cross beam 2 are installed at equal intervals along the length direction of the cross beam 2, the magnetic metal shells 3 are connected with the cross beam 2 through rolling bearings 4, annular grooves are carved in the magnetic metal shells 3 along the radial direction, a non-magnetic annular base 5 is fixedly installed on the cross beam 2 in the annular grooves of the magnetic metal shells 3, an annular permanent magnet ring 6 is fixedly installed on the outer peripheral surface of the annular base 5, excitation coils 7 are fixedly wound on the inner wall surface of the annular grooves of the magnetic metal shells 3 far away from the cross beam 2 in a coaxial mode, and magnetic induction lines 61 generated by the permanent magnet ring 6 are densely distributed in the magnetic metal shells 3 around the excitation coils 7; gaps are reserved between the magnet exciting coil 7 and the permanent magnet circular ring 6 in the radial direction and between the permanent magnet circular ring 6 and the magnetic conductive metal shell 3 in the axial direction; coaxial annular sealing rings 8 are filled between the inner surface of the annular groove of the magnetic conductive metal shell 3 and the outer surfaces of two sides of the annular base 5, a sealing cavity is defined by the outer surfaces of the sealing rings 8, the inner wall of the annular groove of the magnetic conductive metal shell 3, the permanent magnet ring 6 and the excitation coil 7, and magnetorheological fluid 9 is filled in the sealing cavity; a rectangular rubber stop plate 11 is fixedly arranged right below the outer peripheral surface of the magnetic metal shell 3 through a round steel pipe 10; a speed switch 21 with a time delay function is arranged on the lower left of the surface of the rectangular rubber stop plate 11, two leads are connected to the outside of the speed switch 21, one lead is connected with a direct current power supply 22 arranged below the cross beam 2, the other lead is connected with a joint on the outermost layer of the excitation coil 7, and a joint on the innermost layer of the excitation coil 7 is connected with the direct current power supply 22; the direct current power supply 22, the speed switch 21, the excitation coil 7 and the conducting wire form a complete self-adaptive control current loop together.
The working principle of the self-adaptive control magnetorheological height limiting device is as follows: in the working state, the excitation coil 7, the direct current power supply 22, the speed switch 21 and the conducting wire form an adaptive control current loop, and a speed sensor in the speed switch 21 can receive the pulse frequency generated by the ultrahigh vehicle to be monitored. When the tested ultrahigh vehicle is ready to be forced to pass through the height limiting device at a low speed, the generated pulse frequency is less than the set frequency of the speed switch, and the speed switch 21 is in an open state at the moment, so that no current exists in the self-adaptive control current loop; the magnetic field excited by the permanent magnet ring 6 is densely distributed in the magnetorheological fluid 9, the shear yield strength of the magnetorheological fluid 9 is high, the magnetic conductive metal shell 3, the permanent magnet ring 6 and the non-magnetic conductive annular base 5 are firmly fixed together and cannot rotate, and therefore the rectangular rubber stop plate 11 vertically and fixedly arranged below the magnetic conductive metal shell 3 through the circular steel tube 10 can effectively play a role in blocking, and vehicles cannot pass through. When the tested ultrahigh vehicle approaches the height limiting device at a high speed due to negligence, the pulse frequency generated by the device is greater than the set frequency of the speed switch, the speed switch is in a closed state at the moment, the current is generated in the self-adaptive control current loop, the exciting coil 7 generates a magnetic field after being electrified, the direction of the magnetic field generated by the exciting coil 7 is opposite to that of the magnetic field generated by the permanent magnet ring 6, the magnetic fields in the sealed cavity are mutually offset due to the opposite directions, the magnetorheological fluid 9 presents the characteristic of low-viscosity Newtonian fluid under the condition of zero magnetic field, and the shearing yield strength is almost zero; when an ultrahigh vehicle impacts the rectangular rubber stop plate 11 at a high speed, the magnetic conductive metal shell 3 can rotate freely around the cross beam 2 along with the rectangular rubber stop plate 11, so that the impact force is greatly reduced, the vehicle can safely pass through, after the impact is finished, the speed switch 21 is automatically switched off after a period of time delay, and the rectangular rubber stop plate 11 is restored to the original position due to the self-weight action during the time delay of the speed switch 21. After each work is finished, the speed switch 21 and the magnetic conductive metal shell 3 fixedly provided with the rectangular rubber stop plate 11 both automatically recover to the original positions, and the normal work is continued.
The self-adaptive control magnetorheological height limiting device simultaneously overcomes the defects of a steel frame structure height limiting rod and a flexible height limiting rod, can change the rotation resistance of parts of the self according to whether the ultrahigh vehicle speed reaches a set value or not when a vehicle is impacted, ensures that the ultrahigh vehicle is stopped when the speed is lower and can safely pass through when the speed is higher, and avoids traffic accidents; due to the 9 millisecond reaction speed of the magnetorheological fluid, the height limiting device has extremely short reaction time and high safety and reliability.
In other embodiments of the invention, the non-magnetic annular base 5 is not arranged, the permanent magnet ring 6 is directly and fixedly arranged on the cross beam 2, and a sealing cavity is defined by the sealing ring 8, the inner wall of the magnetic metal shell 3, the permanent magnet ring 6 and the excitation coil 7; the number of the stopping main bodies can be adjusted according to actual needs; the stopper plate 11 rubber material may be replaced by a flexible material such as sponge.
Claims (8)
1. A self-adaptive control height limiting device based on magneto-rheological is characterized in that: the magnetic conductive metal shell is internally provided with a permanent magnet ring fixedly connected with the cross beam, and an excitation coil is coaxially and fixedly arranged on the inner wall surface of the magnetic conductive metal shell, which is far away from the cross beam; gaps are arranged between the magnet exciting coil and the permanent magnet ring in the radial direction and between the permanent magnet ring and the magnetic conductive metal shell in the axial direction, a sealing ring is coaxially arranged in the magnetic conductive metal shell, a sealing cavity is defined by the sealing ring, the inner wall of the magnetic conductive metal shell, the permanent magnet ring and the magnet exciting coil, and magnetorheological fluid is filled in the sealing cavity; the height limiting device also comprises a direct current power supply, and the direct current power supply, the magnet exciting coil and the speed switch form an adaptive control current loop through a lead.
2. The adaptive magnetorheological-based control height limiting device according to claim 1, wherein: the permanent magnet circular ring is fixedly sleeved on the cross beam, and the sealing cavity is defined by a sealing ring, the inner wall of the magnetic metal shell, the permanent magnet circular ring and the magnet exciting coil.
3. The adaptive magnetorheological-based control height limiting device according to claim 1, wherein: the magnetic conductive metal shell is rotatably arranged on the cross beam through a bearing.
4. The adaptive control magnetorheological high-limit apparatus according to claim 1, wherein: the magnetic conductive metal shell is made of electrician pure iron DT 4.
5. The adaptive magnetorheological-based control height limiting device according to claim 1, wherein: the direct current power supply is charged by a solar cell panel.
6. The adaptive magnetorheological-based control height limiting device according to claim 1, wherein: the DC power supply is charged by an AC power supply.
7. The adaptive magnetorheological-based control height limiting device according to claim 1, wherein: the stop plate is a rubber plate, and the rubber plate is connected to the magnetic conductive metal shell through a connecting rod.
8. The adaptive magnetorheological-based control height limiting apparatus according to claim 7, wherein: the connecting rod is a round steel pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210075460.5A CN114277706B (en) | 2018-01-19 | 2018-01-19 | Self-adaptive control height limiting device based on magnetorheological fluid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810051396.0A CN108193615B (en) | 2018-01-19 | 2018-01-19 | Self-adaptive control magnetorheological height limiting device |
| CN202210075460.5A CN114277706B (en) | 2018-01-19 | 2018-01-19 | Self-adaptive control height limiting device based on magnetorheological fluid |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810051396.0A Division CN108193615B (en) | 2018-01-19 | 2018-01-19 | Self-adaptive control magnetorheological height limiting device |
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| CN114277706A true CN114277706A (en) | 2022-04-05 |
| CN114277706B CN114277706B (en) | 2023-05-09 |
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| CN202210075460.5A Active CN114277706B (en) | 2018-01-19 | 2018-01-19 | Self-adaptive control height limiting device based on magnetorheological fluid |
| CN201810051396.0A Active CN108193615B (en) | 2018-01-19 | 2018-01-19 | Self-adaptive control magnetorheological height limiting device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104652316A (en) * | 2015-02-02 | 2015-05-27 | 辽宁石油化工大学 | Safety height limiting rod |
| CN104652319A (en) * | 2015-02-07 | 2015-05-27 | 辽宁石油化工大学 | Inflatable safe height-limiting rod |
| CN204898552U (en) * | 2015-07-13 | 2015-12-23 | 山东省五金研究所 | Warning limit for height railing |
| CN208266735U (en) * | 2018-01-19 | 2018-12-21 | 郑州大学 | A kind of magnetorheological height limiter of self adaptive control |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003054417A2 (en) * | 2001-11-08 | 2003-07-03 | Satcon Technology Corporation | Continuously variable transmissions using magnetorheological fluid or oil shear and methods of and systems for using the same in a vehicle, in-wheel application |
| KR101359181B1 (en) * | 2011-12-23 | 2014-02-12 | 주식회사 포스코 | Active guard fence |
| KR101603846B1 (en) * | 2014-06-20 | 2016-03-25 | 정광용 | Robot Apparatus of Traffic Control Mannequin |
| CN104404896B (en) * | 2014-12-02 | 2016-03-16 | 四川大学 | Intelligent magneto-rheological deceleration strip |
| CN204825698U (en) * | 2015-07-29 | 2015-12-02 | 胡中林 | Limit for height pole |
| CN105421260B (en) * | 2015-10-30 | 2017-07-14 | 贾峰 | Highway anti-collision height limit frame |
| CN206486833U (en) * | 2016-12-27 | 2017-09-12 | 西安品质信息科技有限公司 | A kind of multistage intelligent limit for height system |
-
2018
- 2018-01-19 CN CN202210075460.5A patent/CN114277706B/en active Active
- 2018-01-19 CN CN201810051396.0A patent/CN108193615B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104652316A (en) * | 2015-02-02 | 2015-05-27 | 辽宁石油化工大学 | Safety height limiting rod |
| CN104652319A (en) * | 2015-02-07 | 2015-05-27 | 辽宁石油化工大学 | Inflatable safe height-limiting rod |
| CN204898552U (en) * | 2015-07-13 | 2015-12-23 | 山东省五金研究所 | Warning limit for height railing |
| CN208266735U (en) * | 2018-01-19 | 2018-12-21 | 郑州大学 | A kind of magnetorheological height limiter of self adaptive control |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108193615B (en) | 2023-05-12 |
| CN114277706B (en) | 2023-05-09 |
| CN108193615A (en) | 2018-06-22 |
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