CN112681159B - Road safety island anticollision facility and road safety island - Google Patents
Road safety island anticollision facility and road safety island Download PDFInfo
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- CN112681159B CN112681159B CN202011500305.0A CN202011500305A CN112681159B CN 112681159 B CN112681159 B CN 112681159B CN 202011500305 A CN202011500305 A CN 202011500305A CN 112681159 B CN112681159 B CN 112681159B
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- 206010039203 Road traffic accident Diseases 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 241000283070 Equus zebra Species 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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Abstract
The application relates to the field of urban road traffic safety protection equipment, in particular to a road safety island anti-collision facility. The vertical column comprises a mounting seat, a containing cavity arranged in the mounting seat, a vertical column arranged on the mounting seat, a driving device arranged in the containing cavity, a power supply part coupled with the driving device and used for supplying power to the driving device, a control system coupled with the driving device and used for controlling the driving device, and an induction part coupled with the control system and used for triggering the control system, wherein the vertical column comprises a connecting part and a telescopic part, the connecting part is arranged on a fixed seat, and the telescopic part is arranged in the containing cavity and movably connected with the connecting part. The application has the effects of reducing the influence of the stand columns on driving at night and reducing the occurrence rate of traffic accidents.
Description
Technical Field
The application relates to the field of urban road traffic safety protection equipment, in particular to a road safety island anti-collision facility.
Background
The safety island is a safety device installed on a zebra crossing, and aims to enable people to develop a habit of crossing a street for the second time, namely, the people arrive at a pedestrian safety island in the center of a road at the first green light time, and the green light is turned on for the second time to walk the remaining distance, so that the 'rush march' is avoided, and the benefits of old people, children and disabled people are particularly protected.
With respect to the related art among the above, the inventors consider that the following drawbacks exist: in order to protect the safety of pedestrians standing on the safety island, the upright posts are fixed at equal intervals along the circumferential direction of the safety island, and the upright posts can also influence the running of vehicles while protecting the safety of the pedestrians. Particularly, when the driver runs under the condition of insufficient light at night, the driver cannot avoid the upright posts and the safety islands, and easily collides with the upright posts and the safety islands, so that traffic accidents are caused.
Disclosure of Invention
In order to reduce the influence that the stand caused to driving at night, reduce the incidence of car accident, this application provides a road safety island anticollision facility and road safety island.
The above object of the present application is achieved by the following technical solutions:
in a first aspect, the present application provides a road safety island anticollision facility, comprising:
a mounting seat; the device is used for being uniformly arranged in the ground at intervals along the circumferential direction of the road safety island;
an accommodating chamber; is arranged in the mounting seat;
the upright post comprises a connecting part and a telescopic part, the connecting part is arranged on the fixed seat, and the telescopic part is arranged in the accommodating cavity and is movably connected with the connecting part;
the driving device is arranged in the accommodating cavity, is connected with the telescopic part and drives the telescopic part to axially extend out of or retract into the accommodating cavity along the connecting part;
the power supply part is coupled with the driving device and used for supplying electric energy to the driving device;
a control system coupled to the drive device for controlling the drive device; and
and the sensing part is coupled with the control system and used for triggering the control system.
Through adopting above-mentioned technical scheme, drive arrangement can drive the pars contractilis along connecting portion axial displacement, and when the vehicle normally traveled, the pars contractilis was located more than ground, and when the vehicle approached the safety island and had the collision trend, the pars contractilis withdrawal was held the intracavity, was located the below ground to reduce the influence that the stand led to the fact to traveling night, reduce the incidence of traffic accident.
Optionally, the driving device includes an electric cylinder disposed on the bottom wall of the accommodating cavity and a bracket disposed at a driving end of the electric cylinder, the bracket is fixedly connected to the telescopic portion, the electric cylinder drives the telescopic portion to move axially along the upright post through the bracket, and a control end of the electric cylinder is connected to the control system.
Through adopting above-mentioned technical scheme, a drive arrangement's concrete structure is given, and the electricity jar rotates the in-process, can drive the support and remove, and the support drives pars contractilis along connecting portion axial displacement, realizes stretching out or retracting the pars contractilis and holds the intracavity.
Optionally, the driving mechanism includes a first motor disposed on the bottom wall of the accommodating cavity, a gear disposed at a driving end of the first motor, and a rack disposed on the telescopic portion and engaged with the gear, the first motor drives the rack and the telescopic portion to move axially along the upright post through the gear, and a control end of the first motor is connected with the control system.
Through adopting above-mentioned technical scheme, a drive arrangement's concrete structure is given, and first motor rotates the in-process, can drive gear rotation, and gear drive rack is along the axial displacement of connecting portion, and the pars contractilis removes along with the rack, realizes that the pars contractilis stretches out or retracts and hold the intracavity.
Optionally, the power supply part comprises a solar panel for collecting solar energy, a controller connected to an output end of the solar panel, and a storage battery connected to an output end of the controller, wherein the storage battery is used for storing electric energy generated by the solar panel, and supplying the electric energy to the electric cylinder or the first motor through the controller, and supplying the electric energy to the control system.
Through adopting above-mentioned technical scheme, the electric energy storage that solar cell panel produced is in the battery, is supplied power by the battery during the use again, makes things convenient for night like this, and drive arrangement, control system and response part work.
Optionally, the sensing part includes a sensor for detecting a distance between the vehicle and the pillar, an output end of the sensor is connected to the control system, and a voltage input end of the sensor is connected to the power supply part.
Through adopting above-mentioned technical scheme, set up the inductor for detect out the vehicle apart from the distance of stand and safety island, make things convenient for control system control drive arrangement work, and then control the pars contractilis and stretch out or retract and hold the intracavity.
Optionally, the telescopic part fixing device further comprises a fixing device for temporarily fixing the telescopic part.
Through adopting above-mentioned technical scheme for at daytime the period, through the fixed pars contractilis of fixing device, reduce and hold the intracavity because of other artificial reasons lead to the pars contractilis retraction, to standing certain guard action of playing of pedestrian on the safety island.
Optionally, the fixing device includes a second motor disposed on an outer side wall of the connecting portion, a working cavity disposed in the connecting portion and communicated with an inner side wall of the connecting portion, a screw rod disposed in the working cavity and connected to a driving end of the second motor, and a sliding column disposed on the screw rod and abutted to the telescopic portion;
the control end of the second motor is coupled with the control system, and the voltage input end of the second motor is coupled with the power supply part;
the second motor drives the sliding column to reciprocate along the radial direction of the connecting part through the screw rod.
Through adopting above-mentioned technical scheme, given a fixing device's concrete structure, the second motor rotates the in-process, and drive screw rotates, and the screw rod drives the traveller along the radial movement of connecting portion in the working chamber, with pars contractilis butt for fixed pars contractilis.
Optionally, an end of the slide column away from the second motor is tapered in shape.
Through adopting above-mentioned technical scheme, when conical traveller contacted with pars contractilis, the pressure of contact segment was bigger, and positioning effect is better.
In a second aspect, the present application provides a road safety island, including any one of the road safety island anti-collision facilities described in the first aspect and the preferred examples of the first aspect, wherein the road safety island anti-collision facilities are uniformly arranged along the circumferential direction of the road safety island.
In summary, the present application includes at least one of the following beneficial technical effects:
1. be provided with the stand in this application, the stand includes connecting portion and pars contractilis, and when the vehicle approached the safety island and had the collision trend, the pars contractilis held the intracavity along the axial withdrawal of connecting portion under drive arrangement's drive, is located the below ground to reduce the stand and go the influence that causes night, reduce the incidence that the traffic accident took place.
2. This application is provided with fixing device, and fixing device includes second motor, screw rod and traveller, and at the time of daytime, the second motor rotates the in-process, and drive screw rotates, and the screw rod drives the traveller along connecting portion radial movement, traveller and pars contractilis butt, fixed pars contractilis, and the reduction leads to the pars contractilis retraction to hold the intracavity because of other artificial reasons, plays certain guard action to the pedestrian of standing on the safety island.
Drawings
Fig. 1 is a schematic perspective view of an embodiment of the present application.
Fig. 2 is a schematic structural diagram of a first driving device provided in an embodiment of the present application.
Fig. 3 is a schematic structural diagram of a second driving device provided in an embodiment of the present application.
Fig. 4 is an enlarged view of a portion a of fig. 3.
Fig. 5 is a block diagram schematically illustrating a structure of a power supply unit according to an embodiment of the present disclosure.
Fig. 6 is a schematic structural diagram of a control system according to an embodiment of the present application.
Fig. 7 is an enlarged view of a portion B of fig. 2.
Description of reference numerals: 1. a mounting seat; 2. an accommodating chamber; 3. a column; 31. a connecting portion; 32. a telescopic part; 4. a drive device; 41. an electric cylinder; 42. a support; 43. a first motor; 44. a gear; 45. a rack; 5. a power supply section; 51. a solar panel; 52. a controller; 521. a rectifying chip; 522. a power management chip; 523. an inverter; 53. a storage battery; 6. a control system; 61. a CPU; 62. a RAM; 63. a ROM; 64. a system bus; 65. an electric cylinder drive circuit; 66. a first motor drive circuit; 67. a second motor drive circuit; 68. a power supply driver; 7. a sensing portion; 71. a sensor; 8. a fixing device; 81. a second motor; 82. a working chamber; 83. a screw; 84. a traveler; 85. positioning a rod; 9. a road safety island; 10. a road.
Detailed Description
The present application is described in further detail below with reference to figures 1-7.
The embodiment of the application discloses road safety island anticollision institution. Referring to fig. 1 and 2, the road safety island collision avoidance facility is composed of a mounting seat 1, a containing cavity 2, a stand column 3, a driving device 4, a power supply part 5, a control system 6 (refer to fig. 7) and a sensing part 7. For convenience of description, the surface adjacent to the ground is a bottom surface, the surface opposite to the bottom surface is a top surface, and the remaining surfaces are referred to as side surfaces, based on the posture of the column 3 in use.
The upright column 3 comprises a connecting part 31 and a telescopic part 32, the connecting part 31 is vertically fixedly connected to the top wall of the mounting seat 1, the telescopic part 32 is movably arranged in the connecting part 31, and the telescopic part 32 can enter and exit the accommodating cavity 2 in the moving process.
The driving device 4 is installed in the accommodating chamber 2, and is used for providing power for the telescopic part 32, so that the telescopic part 32 enters and exits the accommodating chamber 2 along the axial direction of the connecting part 31.
The power supply portion 5 is installed on the accommodating chamber 2, the expansion portion 32 or the connecting portion 31, and functions to supply power to the driving device 4 so that the driving device 4 can operate.
The control system 6 is used for issuing an instruction to the driving device 4, and when the automobile has a tendency of colliding against the upright post 3, the telescopic part 32 enters the accommodating cavity 2, so that the collision between the automobile and the upright post 3 is reduced.
The induction part 7 is arranged on the connecting part 31 or the side, close to the road driving, of the road safety island 9 and is used for inducing the tendency that an automobile collides with the upright post 3, the induced signal is fed back to the control system 6, the control system 6 is triggered to control the driving device 4 to work, and the driving device 4 drives the telescopic part 32 to enter the accommodating cavity 2, so that the influence of the upright post 3 on the driving at night is reduced, and the occurrence rate of traffic accidents is reduced.
The technical solution of the present application is further described below with reference to specific usage scenarios.
Referring to fig. 1 and 2, if a section of road 10 is four lanes or eight lanes, the road safety island 9 is disposed in the transverse middle area of the road 10, and a plurality of mounting seats 1 may be provided and uniformly buried under the ground along the circumferential direction of the road safety island 9, wherein the specific value of the road safety island 9 is determined according to the circumference of the road safety island 9.
Referring to fig. 2 and 3, the top wall of the mounting seat 1 is flush with the road 10, the connecting portion 31 is integrally formed with the mounting seat 1 or directly welded on the top wall of the mounting seat 1, the height of the connecting portion 31 is flush with the height of the road safety island 9, the expansion portion 32 is sleeved in the connecting portion 31, the expansion portion 32 extends into the accommodating cavity 2 of the mounting seat 1 and is connected with the driving device 4, the expansion portion 32 axially enters and exits the accommodating cavity 2 along the connecting portion 31 under the effect of the driving device 4, namely, the expansion portion 32 is higher than the connecting portion 31 or lower than the height of the connecting portion 31.
In this embodiment, the driving device 4 has the following structures:
referring to fig. 2, in the first type, the driving device 4 is composed of an electric cylinder 41 and a bracket 42, the electric cylinder 41 is fixed on the bottom wall in the mounting base 1, the bracket 42 is mounted on the driving end of the electric cylinder 41 through a bolt, the expansion part 32 is clamped with the bracket 42 or fixed through a bolt, and the control end of the electric cylinder 41 is electrically connected with the control system 6.
In operation, the driving end of the electric cylinder 41 drives the bracket 42 to move along the vertical direction, that is, along the axial direction of the connecting portion 31, and when the bracket 42 moves, the bracket 42 drives the expansion portion 32 to move along the axial direction of the connecting portion 31, so as to realize the height that the expansion portion 32 is higher than the connecting portion 31 or lower than the connecting portion 31.
Referring to fig. 4, in the second type, the driving device 4 is composed of a first motor 43, a gear 44 and a rack 45, the first motor 43 is installed in the accommodating chamber 2, a control end of the first motor 43 is electrically connected to the control system 6, the gear 44 is fixedly connected to a driving end of the first motor 43, the rack 45 is welded to an outer side wall of the expansion part 32, and the gear 44 is engaged with the rack 45.
During operation, the driving end of the first motor 43 drives the gear 44 to rotate in the rotating process, the gear 44 drives the rack 45 to move along the axial direction of the connecting portion 31, and the rack 45 drives the telescopic portion 32 to move along the axial direction of the connecting portion 31 while moving, so that the telescopic portion 32 is higher than the connecting portion 31 or lower than the connecting portion 31.
Referring to fig. 5, as a specific embodiment of the lane adjusting apparatus provided by the application, the power supply part 5 is composed of a solar panel 51, a controller 52 and a storage battery 53, the storage battery 53 is placed in the accommodating chamber 2, the controller 52 may be installed together with the storage battery 53, or installed in the telescopic part 32 under the solar panel 51, or independently installed in a control box, and in this embodiment, the controller 52 is installed together with the storage battery 53.
The solar cell panel 51 is attached to the top end of the expansion part 32 of the column 3, and converts solar energy into electric energy by using the photoelectric effect of a semiconductor material. The controller 52 is used for charging the storage battery 53 by using the solar panel 51 and supplying power to the load by the storage battery 53 through the solar inverter 523, and mainly comprises a rectifier chip 521, a power management chip 522 and the inverter 523.
The current generated by the solar cell panel 51 tends to be smooth after passing through the rectifier chip 521, and then flows into the storage battery 53 through the power management chip 522 to be stored. At the time of output, the current in the battery 53 flows into the inverter 523 via the power management chip 522, passes through the inverter 523, and is input to the driving device 4, the control system 6, and the induction section 7.
It should be understood that the voltage output by the inverter 523 is constant, and for the driving device 4, the control system 6 and the induction part 7, if the voltage is not appropriate, a transformer needs to be additionally added. For example, if the output voltage of the battery 53 is 36V and the rated voltage of the control system 6 is 12V, a transformer for converting 36V to 12V is required between the two.
Referring to fig. 6, the control system 6, referred to above, may be a CPU61, a microprocessor, an ASIC, or one or more integrated circuits for controlling the execution of programs of the above. The control system 6 mainly comprises a CPU61, a RAM62, a ROM63, a system bus 64 and the like, wherein the CPU61, the RAM62 and the ROM63 are all connected to the system bus 64.
The control terminal of the electric cylinder 41 is connected to the system bus 64 via an electric cylinder drive circuit 65, the control terminal of the first motor 43 is connected to the system bus 64 via a first motor drive circuit 66, the control terminal of the second motor 81 is connected to the system bus 64 via a second motor drive circuit 67, and the controller 52 is connected to the system bus 64 via a power driver 68.
In some possible implementations, the control system 6 uses a PLC or a DCS. The current output by the power supply part 5 is transmitted to the electric cylinder 41 after passing through a contactor and a commutator, the contactor is responsible for switching on and off of a circuit, and the commutator is responsible for adjusting the flow direction of the current, so that the steering of the electric cylinder 41 is changed. The control system 6 of the contactors and commutators is controlled by means of relays. The core component of the electric cylinder 41 is a motor, so the control manner of the first motor 43 and the second motor 81 is the same as that of the electric cylinder 41, and the description thereof is omitted.
Referring to fig. 5 and 6, the sensing part 7 includes a sensor 71, and the sensor 71 may employ an acceleration sensor 71, a pressure sensor 71, or a vibration sensor 71. Wherein the sensor 71 is connected to the system bus 64 through a sensor via an inductive feedback circuit. In the night period, can detect the distance between car and the stand 3, when car stand 3 has the trend of collision, feed back to control system 6 through the control bus, control system 6 control drive arrangement 4 work, drive arrangement 4 drive stand 3 the pars contractilis 32 get into and hold in the chamber 2.
Referring to fig. 3 and 7, as a specific embodiment of the road safety island anti-collision facility provided by the application, a fixing device 8 is further included, it should be understood that, during the daytime, the telescopic portion 32 may be retracted into the cavity due to some human factors or other factors, and cannot protect pedestrians standing on the road safety island 9, so the fixing device 8 is provided to fix the telescopic portion 32, so that the height of the telescopic portion 32 is higher than that of the connecting portion 31, and a certain protection effect is provided for the pedestrians standing on the safety island.
In the present embodiment, the fixing device 8 has the following structure:
referring to fig. 7, in the first embodiment, the fixing device 8 is composed of four parts, namely, a second motor 81 disposed on the outer side wall of the connecting portion 31, a working chamber 82 opened in the connecting portion 31 and communicated with the inner side wall of the connecting portion 31, a screw 83 disposed in the working chamber 82 and connected to the driving end of the second motor 81, and a sliding column 84 disposed on the screw 83 and abutted to the telescopic portion 32, wherein the sliding column 84 can reciprocate along the working chamber 82.
The power when the sliding column 84 moves is provided by the second motor 81, the second motor 81 is installed on the outer side wall of the connecting portion 31, the voltage input end of the second motor 81 is connected with the power supply portion 5, the control end is connected with the control system 6, the driving shaft of the second motor 81 penetrates through the side wall of the connecting portion 31 to be connected with the screw 83, the sliding column 84 is sleeved on the screw 83, when the second motor 81 rotates, the screw 83 is driven to rotate, the screw 83 drives the sliding column 84 to slide in the working cavity 82 and abut against the side wall of the telescopic portion 32, and therefore the telescopic portion 32 is fixed.
In order to increase the pressure of the contact portion between the spool 84 and the telescopic portion 32 and to achieve a better positioning effect, the end of the spool 84 away from the second motor 81 is tapered.
Referring to fig. 3, in the second embodiment, the fixing device 8 is a positioning rod 85, a fixing block is welded on the outer side wall of the connecting portion 31, a positioning hole is radially formed in the fixing block along the connecting portion 31, and the positioning rod 85 penetrates through the positioning hole to position the telescopic portion 32.
Referring to fig. 1, the embodiment of the present application further discloses a road safety island, which includes any one of the above-mentioned road safety island anti-collision facilities, and any one of the above-mentioned road safety island anti-collision facilities is uniformly distributed along the circumferential direction of the road safety island 9. Wherein, the anti-collision facilities of the road safety island 9 are long-strip-shaped concrete-poured tables, and two ends of each table along the length direction of the road are arc-shaped; and in order to achieve the warning effect, the road safety island 9 is brushed with yellow and black spaced warning strips along the self circumferential direction.
Further, it should be understood that any one of the above-mentioned road safety island collision avoidance facilities operates when a vehicle collides against a safety island during night. Therefore, in daytime, even if the vehicle collides with the anti-collision facility of the road safety island 9, the anti-collision facility of the road safety island 9 does not work; in other words, in daytime, the road safety island anti-collision facility has the same function as a common blocking and preventing device, and plays a certain protection role for pedestrians standing on the safety island.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (4)
1. A road safety island anticollision facility, characterized by comprising:
a mounting seat (1); the safety island is used for being uniformly arranged in the ground at intervals along the circumferential direction of the road safety island (9);
an accommodation chamber (2); is arranged in the mounting seat (1);
the upright post (3) comprises a connecting part (31) and a telescopic part (32), the connecting part (31) is arranged on the fixed seat, and the telescopic part (32) is arranged in the accommodating cavity (2) and movably connected with the connecting part (31);
the driving device (4) is arranged in the accommodating cavity (2), is connected with the telescopic part (32) and drives the telescopic part (32) to axially extend out or retract into the accommodating cavity (2) along the connecting part (31);
a power supply section (5) coupled to the drive device (4) for supplying electrical energy to the drive device (4);
a control system (6) coupled to the drive device (4) for controlling the drive device (4); and
a sensing part (7) coupled with the control system (6) for triggering the control system (6);
the power supply part (5) comprises a solar panel (51) for collecting solar energy, a controller (52) connected with the output end of the solar panel (51) and a storage battery (53) connected with the output end of the controller (52), wherein the storage battery (53) is used for storing electric energy generated by the solar panel (51) and supplying the electric energy to the driving device (4) and the control system (6) through the controller (52); the controller (52) comprises a rectifying chip (521), a power management chip (522) and an inverter (523), and the controller (52) charges the storage battery (53) by using the solar panel (51) and supplies power to a load by using the storage battery (53) through the inverter (523); the current generated by the solar panel 51 sequentially passes through the rectifier chip (521) and the power management chip (522) and then flows into the storage battery (53) for storage, and the output current of the storage battery (53) flows into the inverter (523) through the power management chip (522) and then is input into the driving device (4), the control system (6) and the induction part (7) through the inverter (523);
the induction part (7) comprises a sensor (71) for detecting the distance between the automobile and the upright post (3), the output end of the sensor (71) is connected with the control system (6), and the voltage input end is connected with the power supply part (5);
the fixing device (8) is used for temporarily fixing the telescopic part (32) and is used for fixing the telescopic part (32) in the daytime; the fixing device (8) comprises a second motor (81) arranged on the outer side wall of the connecting part (31), a working cavity (82) which is arranged in the connecting part (31) and communicated with the inner side wall of the connecting part (31), a screw rod (83) which is arranged in the working cavity (82) and connected with the driving end of the second motor (81), and a sliding column (84) which is arranged on the screw rod (83) and abutted to the telescopic part (32); the control end of the second motor (81) is coupled with the control system (6), and the voltage input end is coupled with the power supply part (5); the second motor (81) drives the sliding column (84) to reciprocate along the radial direction of the connecting part (31) through a screw rod (83); the end of the sliding column (84) far away from the second motor (81) is conical in shape.
2. The road safety island anticollision facility according to claim 1, characterized in that: drive arrangement (4) including locating electric jar (41) on holding chamber (2) diapire and locating support (42) of electric jar (41) drive end, support (42) and pars contractilis (32) fixed connection, electric jar (41) are through support (42) drive pars contractilis (32) along stand (3) axial displacement, the control end and the control system (6) of electric jar (41) are connected.
3. The road safety island anticollision facility according to claim 1, characterized in that: drive arrangement (4) including locate first motor (43) on holding chamber (2) diapire, locate gear (44) of first motor (43) drive end and locate pars contractilis (32) and with gear (44) meshing rack (45), first motor (43) are through gear (44) drive rack (45) and pars contractilis (32) along stand (3) axial displacement, the control end and the control system (6) of first motor (43) are connected.
4. A road safety island, comprising a road safety island collision avoidance facility according to any one of claims 1 to 3, the road safety island (9) collision avoidance arrangements being arranged circumferentially and uniformly along the road safety island (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011500305.0A CN112681159B (en) | 2020-12-17 | 2020-12-17 | Road safety island anticollision facility and road safety island |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011500305.0A CN112681159B (en) | 2020-12-17 | 2020-12-17 | Road safety island anticollision facility and road safety island |
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| Publication Number | Publication Date |
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| CN112681159A CN112681159A (en) | 2021-04-20 |
| CN112681159B true CN112681159B (en) | 2022-07-01 |
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| CN202011500305.0A Expired - Fee Related CN112681159B (en) | 2020-12-17 | 2020-12-17 | Road safety island anticollision facility and road safety island |
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