CN111047877A - Ground induction coil device for license plate recognition system - Google Patents
Ground induction coil device for license plate recognition system Download PDFInfo
- Publication number
- CN111047877A CN111047877A CN201911141043.0A CN201911141043A CN111047877A CN 111047877 A CN111047877 A CN 111047877A CN 201911141043 A CN201911141043 A CN 201911141043A CN 111047877 A CN111047877 A CN 111047877A
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- induction coil
- license plate
- box
- ground induction
- coil device
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- 230000006698 induction Effects 0.000 title claims abstract description 32
- 238000009434 installation Methods 0.000 claims abstract description 49
- 238000012545 processing Methods 0.000 claims abstract description 8
- 241000883990 Flabellum Species 0.000 claims abstract description 3
- 230000001681 protective effect Effects 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 12
- 239000010935 stainless steel Substances 0.000 claims description 12
- 229910001220 stainless steel Inorganic materials 0.000 claims description 12
- 210000001503 joint Anatomy 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 9
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 238000000034 method Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/02—Detecting movement of traffic to be counted or controlled using treadles built into the road
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/017—Detecting movement of traffic to be counted or controlled identifying vehicles
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/042—Detecting movement of traffic to be counted or controlled using inductive or magnetic detectors
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/048—Detecting movement of traffic to be counted or controlled with provision for compensation of environmental or other condition, e.g. snow, vehicle stopped at detector
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- General Induction Heating (AREA)
Abstract
The invention relates to the technical field of license plate recognition equipment, and discloses a ground induction coil device for a license plate recognition system, which comprises an embedded box, wherein eight embedded nails are fixedly installed at the bottom of the embedded box, an installation box is movably installed on the inner bottom wall of the embedded box, an installation plate is movably installed in the installation box, and the top of the installation plate is provided with a vent hole, one end of which penetrates through the installation box and extends to the bottom of the installation plate. This a ground induction coil device for license plate identification system, generate heat the stick through setting up, rotation axis and flabellum, the user is when the user is using equipment, temperature sensor detects the ambient temperature that the coil body is located, when the temperature is less than the default, central processing unit opens the stick and the CD-ROM drive motor that generate heat, the ambient temperature that the coil body is located rises, close stick and the CD-ROM drive motor that generates heat when reaching the default temperature, so, the coil body can not be out of order under low temperature weather, user's vexation has been removed from, user's use has been made things convenient for.
Description
Technical Field
The invention relates to the technical field of license plate recognition equipment, in particular to a ground induction coil device for a license plate recognition system.
Background
The ground induction coil has simple action principle, two to three turns of conducting wires are embedded in a circular groove with the diameter of about one meter or a rectangular groove with the same area, which is made on the ground, so as to form the ground induction coil embedded on the ground, the coil and a capacitor together form an oscillating circuit, when a large metal object such as an automobile passes through, a space medium changes to cause the change of oscillation frequency, and the change can be used as a confirmation signal that the automobile passes through
The conventional ground induction coil device for the license plate recognition system is frequently out of order and misaligned in winter, and the sensitivity of the ground induction coil is lost in low temperature, so that a user is very annoying, and therefore, the ground induction coil device for the license plate recognition system is provided.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the ground induction coil device for the license plate recognition system, which has the advantages of no failure in low-temperature weather and the like, and solves the problems that the traditional ground induction coil device for the license plate recognition system often has failure and misalignment in winter and the sensitivity of the ground induction coil is lost in low-temperature condition.
(II) technical scheme
In order to achieve the purpose of preventing the failure in low-temperature weather, the invention provides the following technical scheme: a ground induction coil device for a license plate recognition system comprises an embedded box, wherein eight embedded nails are fixedly arranged at the bottom of the embedded box, an installation box is movably arranged on the inner bottom wall of the embedded box, an installation plate is movably arranged in the installation box, vent holes are formed in the top of the installation plate, one ends of the vent holes penetrate through and extend to the bottom of the installation plate, threaded through holes are formed in the left side and the right side of the installation box, one ends of the threaded through holes penetrate through and extend to the inside of the installation box, butt joint threaded grooves are formed in the left side and the right side of the installation box, butt joint screws, one ends of the threaded through holes penetrate through and extend into the butt joint threaded grooves, a coil body is fixedly arranged at the top of the installation plate, a lifting ring is fixedly arranged at the top of the installation box, two heating rods are fixedly arranged on the inner bottom wall of the installation, the inner bottom wall of the installation box is fixedly provided with a vertical plate at the right side of the heating rod, the left side of the vertical plate is fixedly provided with a protective cover, the left side of the vertical plate is fixedly provided with a driving motor at the inner part of the protective cover, the output end of the driving motor is fixedly provided with a rotating shaft with one end penetrating and extending to the left side of the protective cover, the top and the bottom of the rotating shaft are both fixedly provided with fan blades, the inner bottom wall of the installation box is fixedly provided with a temperature sensor at the right side of the vertical plate, the inner bottom wall of the installation box is fixedly provided with a central processing unit at the right side of the temperature sensor, the left and the right sides of the inner wall of the embedded box are both fixedly provided with two clamping sleeve rods, one ends of the two clamping sleeve rods, far away from the embedded box, are both fixedly connected with a positioning plate, the top of the positioning plate is, the inside movable mounting of embedding case has the apron that contacts with the stopper, the slot has been seted up at the top of stopper, the equal fixed mounting in bottom left and right sides of apron has one end to run through and extend to the inside picture peg of slot.
Preferably, the embedded box and the embedded nails are both made of stainless steel, and the eight embedded nails are equidistantly distributed at the bottom of the embedded box.
Preferably, the installation box and the installation plate are made of PVC plastics, and the diameter of the vent hole is one centimeter.
Preferably, the thread through hole and the butt joint thread groove are matched with a butt joint screw, and the lifting ring is made of stainless steel.
Preferably, the protective cover is made of copper-aluminum alloy, and the thickness of the inner wall of the protective cover is zero point five centimeters.
Preferably, the heating rod, the driving motor and the temperature sensor are all electrically connected with the central processing unit, and the fan blades are aluminum plates.
Preferably, the centre gripping loop bar includes restriction loop bar and centre gripping spring, centre gripping spring has been cup jointed to the outside of restriction loop bar, the restriction loop bar further includes hollow rod and interior pole, the inside movable mounting of hollow rod has one end to run through and extends to the outside interior pole of hollow rod.
Preferably, the positioning plate and the introducing plate are both made of stainless steel, and the introducing plate is designed in an inclined mode.
Preferably, the cover plate is made of stainless steel, and the slot is matched with the inserting plate.
(III) advantageous effects
Compared with the prior art, the invention provides a ground induction coil device for a license plate recognition system, which has the following beneficial effects:
1. this a ground induction coil device for license plate identification system, generate heat the stick through setting up, the riser, the protection casing, driving motor, rotation axis and flabellum, the user is when the user is using equipment, temperature sensor detects the ambient temperature that the coil body is located, when the temperature is less than the default, central processing unit opens the stick and the driving motor that generate heat, coil body place ambient temperature rises, close stick and driving motor that generate heat when reaching the preset temperature, so, the coil body can not be out of order under low temperature weather, user's vexation has been removed from, user's use has been made things convenient for.
2. This a ground induction coil device for license plate identification system through setting up embedded box, embedding nail, install bin and mounting panel, and the user is when the user is using equipment, and the user digs the groove at the erection equipment highway section, puts into embedded box, and the surface covers pitch, when needs overhaul change coil body, digs the pitch of covering, take out the install bin can, the coil body can not be infected with pitch, takes out easily, so, has further made things convenient for user's use.
Drawings
FIG. 1 is a schematic structural diagram of a ground induction coil device for a license plate recognition system according to the present invention;
FIG. 2 is an enlarged view of a ground coil device for a license plate recognition system according to the present invention, shown at A in FIG. 1;
fig. 3 is an enlarged view of a ground induction coil device for a license plate recognition system according to the present invention, which is shown at B in fig. 1.
In the figure: the heat-insulation board comprises an embedded box 1, an embedded nail 2, an installation box 3, an installation plate 4, a thread through hole 5, a thread groove 6, a butt screw 7, a coil body 8, a lifting ring 9, a heating rod 10, a vertical plate 11, a driving motor 12, a rotating shaft 13, fan blades 14, a temperature sensor 15, a central processor 16, a clamping sleeve rod 17, a positioning plate 18, a lead-in plate 19, a limiting block 20, a cover plate 21, an air vent 22, a protective cover 23, a slot 24 and a plug board 25.
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, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, a ground induction coil device for a license plate recognition system comprises an embedded box 1, eight embedded nails 2 are fixedly installed at the bottom of the embedded box 1, an installation box 3 is movably installed on the inner bottom wall of the embedded box 1, an installation plate 4 is movably installed inside the installation box 3, a vent hole 22 with one end penetrating and extending to the bottom of the installation plate 4 is opened at the top of the installation plate 4, threaded through holes 5 with one end penetrating and extending to the inside of the installation box 3 are opened at the left side and the right side of the installation box 3, butt-joint threaded grooves 6 are opened at the left side and the right side of the installation box 4, butt-joint screws 7 with one end penetrating through the threaded through holes 5 and extending into the butt-joint threaded grooves 6 are movably installed at the left side and the right side of the installation box 3, a coil body 8 is fixedly installed at the top of the installation box 4, a lifting ring 9 is fixedly installed at the top of the installation box 3, a vertical plate 11 is fixedly arranged on the inner bottom wall of the installation box 3 and positioned at the right side of the heating rod 10, a protective cover 23 is fixedly arranged on the left side of the vertical plate 11 and positioned inside the protective cover 23, a driving motor 12 is fixedly arranged on the left side of the vertical plate 11 and positioned inside the protective cover 23, a rotating shaft 13 with one end penetrating through and extending to the left side of the protective cover 23 is fixedly arranged at the output end of the driving motor 12, fan blades 14 are fixedly arranged at the top and the bottom of the rotating shaft 13, a temperature sensor 15 is fixedly arranged on the inner bottom wall of the installation box 3 and positioned at the right side of the vertical plate 11, a central processing unit 16 is fixedly arranged on the inner bottom wall of the installation box 3 and positioned at the right side of the temperature sensor 15, two clamping sleeve rods 17 are fixedly arranged at the left side and the right side of the inner wall of the embedded, the left side and the right side of the inner wall of the embedded box 1 and above the clamping sleeve rod 17 are both fixedly provided with a limiting block 20, the embedded box 1 is internally movably provided with a cover plate 21 contacted with the limiting block 20, the top of the limiting block 20 is provided with a slot 24, the left side and the right side of the bottom of the cover plate 21 are both fixedly provided with inserting plates 25, one ends of which penetrate through and extend into the slot 24, the embedded box 1 and the embedded nails 2 are both made of stainless steel, eight embedded nails 2 are equidistantly distributed at the bottom of the embedded box 1, the installation box 3 and the installation plate 4 are both made of PVC plastic, the diameter of the vent hole 22 is one centimeter, the threaded through hole 5 and the butt threaded slot 6 are both matched with the butt screw 7, the lifting ring 9 is made of stainless steel, the protection cover 23 is made of copper-aluminum alloy, the thickness of the zero point of the inner wall of the protection cover 23 is five centimeters, the clamping loop bar 17 comprises a limiting loop bar and a clamping spring, the clamping spring is sleeved outside the limiting loop bar, the limiting loop bar further comprises a hollow bar and an inner bar, the inner bar with one end penetrating and extending to the outside of the hollow bar is movably mounted inside the hollow bar, the positioning plate 18 and the introducing plate 19 are made of stainless steel, the introducing plate 19 is designed in an inclined mode, the cover plate 21 is made of stainless steel, the inserting groove 24 is matched with the inserting plate 25, the heating bar 10, the vertical plate 11, the protective cover 23, the driving motor 12, the rotating shaft 13 and the fan blades 14 are arranged, when a user uses the device, the temperature sensor 15 detects the environment temperature of the coil body 8, when the temperature is lower than a preset value, the central processor 16 turns on the heating bar 10 and the driving motor 12, the environment temperature of the coil body 8 rises, and when the preset temperature is reached, the heating bar 10 and the driving motor 12 are turned off, therefore, the vexation of having removed the user from, made things convenient for user's use, through setting up embedded box 1, embedding nail 2, install bin 3 and mounting panel 4, the user is when the user is using equipment, the user digs the groove at the erection equipment highway section, put into embedded box 1, the surface covering pitch, when coil body 8 is more changed in needs maintenance, dig the pitch that covers, take out install bin 3 can, coil body 8 can not be infected with the pitch, take out easily, so, further made things convenient for user's use.
To sum up, the ground induction coil device for the license plate recognition system comprises a heating rod 10, a vertical plate 11, a protective cover 23, a driving motor 12, a rotating shaft 13 and fan blades 14, wherein when a user uses the device, a temperature sensor 15 detects the ambient temperature of a coil body 8, when the temperature is lower than a preset value, a central processing unit 16 turns on the heating rod 10 and the driving motor 12, the ambient temperature of the coil body 8 rises, and when the preset temperature is reached, the heating rod 10 and the driving motor 12 are turned off, so that the coil body 8 does not malfunction in low-temperature weather, the trouble of the user is avoided, the use of the user is facilitated, by arranging an embedded box 1, an embedded nail 2, a mounting box 3 and a mounting plate 4, when the user uses the device, the user puts the embedded box 1 into a road section groove of the mounting device, covers asphalt on the surface, and when the coil body 8 needs to be overhauled and replaced, dig open the pitch that covers, take out install bin 3 can, coil body 8 can not be infected with pitch, takes out easily, so, further made things convenient for user's use, solved the ground induction coil device that traditional is used for license plate identification system and used often the condition emergence that the failure is out of alignment winter, under the low temperature condition, the problem of ground induction coil sensitivity loss.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A ground induction coil device for a license plate recognition system, includes embedded case (1), its characterized in that: the embedded box is characterized in that the bottom of the embedded box (1) is fixedly provided with eight embedded nails (2), the inner bottom wall of the embedded box (1) is movably provided with an installation box (3), the inner part of the installation box (3) is movably provided with an installation plate (4), the top of the installation plate (4) is provided with an air vent (22) with one end penetrating and extending to the bottom of the installation plate (4), the left side and the right side of the installation box (3) are both provided with a thread through hole (5) with one end penetrating and extending to the inner part of the installation box (3), the left side and the right side of the installation plate (4) are both provided with butt joint thread grooves (6), the left side and the right side of the installation box (3) are both movably provided with butt joint screws (7) with one end penetrating the thread through hole (5) and extending to the butt joint thread grooves (6), the top of, the top fixed mounting of install bin (3) has lifting ring (9), the interior diapire fixed mounting of install bin (3) has the stick (10) that generates heat that quantity is two, the interior diapire of install bin (3) just is located the right side fixed mounting who generates heat stick (10) and has riser (11), the left side fixed mounting of riser (11) has protection casing (23), the left side of riser (11) just is located protection casing (23) inside fixed mounting has driving motor (12), the output fixed mounting of driving motor (12) has one end to run through and extend to the left rotation axis (13) of protection casing (23), the top and the bottom of rotation axis (13) all fixed mounting have flabellum (14), the interior diapire of install bin (3) just is located the right side fixed mounting of riser (11) and has temperature sensor (15), the interior diapire of install bin (3) just is located the right side fixed mounting of temperature sensor (15) has central processing unit (16), the equal fixed mounting of the inner wall left and right sides of embedding case (1) has quantity to be two centre gripping loop bar (17), two the one end of embedding case (1) is kept away from in centre gripping loop bar (17) all with locating plate (18) fixed connection, the top fixed mounting of locating plate (18) has introduces board (19), the equal fixed mounting in top that the inner wall left and right sides of embedding case (1) just is located centre gripping loop bar (17) has stopper (20), the inside movable mounting of embedding case (1) has apron (21) that contacts with stopper (20), slot (24) have been seted up at the top of stopper (20), the equal fixed mounting in bottom left and right sides of apron (21) has one end to run through and extend to inside picture peg (25) of slot (24).
2. The ground induction coil device for the license plate recognition system of claim 1, wherein: the embedded box (1) and the embedded nails (2) are both made of stainless steel, and the eight embedded nails (2) are equidistantly distributed at the bottom of the embedded box (1).
3. The ground induction coil device for the license plate recognition system of claim 1, wherein: the mounting box (3) and the mounting plate (4) are both made of PVC plastic, and the diameter of the vent hole (22) is one centimeter.
4. The ground induction coil device for the license plate recognition system of claim 1, wherein: the thread through hole (5) and the butt joint thread groove (6) are matched with a butt joint screw (7), and the lifting ring (9) is made of stainless steel.
5. The ground induction coil device for the license plate recognition system of claim 1, wherein: the protective cover (23) is made of copper-aluminum alloy, and the thickness of the inner wall of the protective cover (23) is zero point five centimeters.
6. The ground induction coil device for the license plate recognition system of claim 1, wherein: the heating rod (10), the driving motor (12) and the temperature sensor (15) are all electrically connected with the central processing unit (16), and the fan blades (14) are aluminum plates.
7. The ground induction coil device for the license plate recognition system of claim 1, wherein: centre gripping loop bar (17) are including restriction loop bar and centre gripping spring, centre gripping spring has been cup jointed to the outside of restriction loop bar, restriction loop bar further includes hollow rod and interior pole, the inside movable mounting of hollow rod has one end to run through and extends to the outside interior pole of hollow rod.
8. The ground induction coil device for the license plate recognition system of claim 1, wherein: the positioning plate (18) and the lead-in plate (19) are both made of stainless steel, and the lead-in plate (19) is designed in an inclined mode.
9. The ground induction coil device for the license plate recognition system of claim 1, wherein: the cover plate (21) is made of stainless steel, and the slot (24) is matched with the plug board (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911141043.0A CN111047877A (en) | 2019-11-20 | 2019-11-20 | Ground induction coil device for license plate recognition system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911141043.0A CN111047877A (en) | 2019-11-20 | 2019-11-20 | Ground induction coil device for license plate recognition system |
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| Publication Number | Publication Date |
|---|---|
| CN111047877A true CN111047877A (en) | 2020-04-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911141043.0A Pending CN111047877A (en) | 2019-11-20 | 2019-11-20 | Ground induction coil device for license plate recognition system |
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| CN (1) | CN111047877A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101009819A (en) * | 2006-12-27 | 2007-08-01 | 湖南大学 | Vehicle security vision intelligent detection device |
| KR20090056053A (en) * | 2007-11-29 | 2009-06-03 | 경북대학교 산학협력단 | Vehicle management apparatus and method |
| CN202676737U (en) * | 2012-06-15 | 2013-01-16 | 四川纵横测控技术股份有限公司 | Portable detection device with heating function |
| CN109147067A (en) * | 2018-07-23 | 2019-01-04 | 四川曜诚鑫科技有限公司 | A kind of parking lot appearance identification control method |
| CN208384639U (en) * | 2018-04-12 | 2019-01-15 | 交通运输部路网监测与应急处置中心 | A kind of lane high speed ETC vehicle is deducted fees system |
| CN109523801A (en) * | 2018-11-20 | 2019-03-26 | 江西育泊科技有限公司 | A kind of TDMA wireless geomagnetism wagon detector |
| CN110042775A (en) * | 2019-05-05 | 2019-07-23 | 王岩 | A kind of road traffic engineering slowing-down structure |
-
2019
- 2019-11-20 CN CN201911141043.0A patent/CN111047877A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101009819A (en) * | 2006-12-27 | 2007-08-01 | 湖南大学 | Vehicle security vision intelligent detection device |
| KR20090056053A (en) * | 2007-11-29 | 2009-06-03 | 경북대학교 산학협력단 | Vehicle management apparatus and method |
| CN202676737U (en) * | 2012-06-15 | 2013-01-16 | 四川纵横测控技术股份有限公司 | Portable detection device with heating function |
| CN208384639U (en) * | 2018-04-12 | 2019-01-15 | 交通运输部路网监测与应急处置中心 | A kind of lane high speed ETC vehicle is deducted fees system |
| CN109147067A (en) * | 2018-07-23 | 2019-01-04 | 四川曜诚鑫科技有限公司 | A kind of parking lot appearance identification control method |
| CN109523801A (en) * | 2018-11-20 | 2019-03-26 | 江西育泊科技有限公司 | A kind of TDMA wireless geomagnetism wagon detector |
| CN110042775A (en) * | 2019-05-05 | 2019-07-23 | 王岩 | A kind of road traffic engineering slowing-down structure |
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Application publication date: 20200421 |
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