CN208110835U - Signals of vehicles acquisition testing control system - Google Patents
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- CN208110835U CN208110835U CN201820741888.8U CN201820741888U CN208110835U CN 208110835 U CN208110835 U CN 208110835U CN 201820741888 U CN201820741888 U CN 201820741888U CN 208110835 U CN208110835 U CN 208110835U
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Abstract
The utility model discloses a kind of signals of vehicles acquisition testing control system, when the utility model enters predetermined detection area by using geomagnetism detecting sensor acquisition vehicle, the earth induction strength signal that magnetic field intercepts generate over the ground, i.e. using earth magnetic field ferromagnetic object (vehicle) by when variation realize the acquisition to signals of vehicles, therefore will not climate influence, and since geomagnetism detecting sensor only has reaction to ferromagnetic object, only detect vehicular traffic, therefore erroneous detection can be effectively reduced (i.e. using the data of nonferromagnetic object as vehicle data processing).In addition, the on-off model or level signal that the source of early warning in various intelligent transportation systems can identify are converted to through signal processor by the earth induction strength signal for obtaining geomagnetism detecting sensor, so as to so that source of early warning directly makes warning information according to the on-off model or level signal that are converted to.
Description
Technical field
The utility model relates to field of intelligent transportation technology, in particular to a kind of signals of vehicles acquisition testing control system.
Background technique
Intelligent transportation is a service system based on hyundai electronics information technology towards communications and transportation.Its outstanding feature
Be with the collection of information, processing, publication, exchange, analysis, using serving as theme, provide multifarious service for traffic participant.
The key for realizing intelligent transportation is vehicle flowrate, flow velocity, occupation rate, the vehicle how fast and accurately acquired on lane
Away from grade comprehensive traffics data when head, and the various infrared sensing detection devices released at present are easy by radio frequency spoke in the concrete realization
The interference penetrated, and in environment temperature and close detected object temperature, detection and sensitivity can all be affected.
In addition, another common detection realized using weighing sensor to vehicular traffic, it can be due to weighing sensor
The weighing sensor that itself center of gravity is higher, overload capacity is poor and preparation weighs greatly is difficult to reach asking for high class of accuracy
Topic influences to acquire speed and accuracy.
Also, above two mode, require vehicle after testing equipment when, data could be obtained, can not be in default peace
The acquisition testing to signals of vehicles is realized in gamut in advance so that various traffic control systems can not make in advance it is pre-
It is alert.
Above content is only used to facilitate the understanding of the technical scheme, and is not represented and is recognized that above content is existing skill
Art.
Utility model content
The main purpose of the utility model is to provide a kind of signals of vehicles acquisition testing control system, it is intended to solve existing skill
The acquisition testing to signals of vehicles, and the technical problem that collected signals of vehicles accuracy is low can not be realized in art in advance.
To achieve the above object, the utility model proposes signals of vehicles acquisition testing control system, including：Geomagnetism detecting
Sensor and signal processor, the geomagnetism detecting sensor and the signal processor communicate to connect, and the geomagnetism detecting passes
Sensor is embedded under road surface locating for lane；
The geomagnetism detecting sensor, when entering predetermined detection area for obtaining vehicle, magnetic field intercepts are generated over the ground
Earth induction strength signal, and the earth induction strength signal is transmitted to the signal processor, the default detection zone
Domain is using the geomagnetism detecting sensor mounting location as the center of circle, using the preset length region determining as radius；
The signal processor, for the earth induction strength signal received to be converted to on-off model or electricity
Ordinary mail number.
Preferably, the geomagnetism detecting sensor is wireless geomagnetism detection sensor.
Preferably, radio band of the wireless geomagnetism detection sensor work in 433MHz；
Correspondingly, the wireless geomagnetism detection sensor is by the radio band of 433MHz, by the earth induction intensity
Signal is transmitted to the signal processor.
Preferably, radio band of the wireless geomagnetism detection sensor work in 2.4GHz；
Correspondingly, the wireless geomagnetism detection sensor is by the radio band of 2.4GHz, by the earth induction intensity
Signal is transmitted to the signal processor.
Preferably, the wireless geomagnetism detection is sensed as flow type wireless geomagnetism detection sensor.
Preferably, the signal processor is wireless geomagnetism communication base station.
Preferably, the wireless geomagnetism communication base station is also used to using in RS232 interface, RS485 interface, Ethernet interface
Any one or any combination, the on-off model or the level signal are transmitted to the safety management of rail traffic crossing
Prior-warning device in system.
Preferably, the wireless geomagnetism communication base station is also used to utilize Ethernet interface, wireless fidelity interface, mobile phone
Any one in mobile communication standards interface, purple peak protocol interface or any combination, by the on-off model or the electricity
Ordinary mail number is transmitted to vehicle management platform.
It is right when technical solutions of the utility model enter predetermined detection area by using geomagnetism detecting sensor acquisition vehicle
Earth's magnetic field cutting generate earth induction strength signal, i.e., using earth magnetic field ferromagnetic object (vehicle) by when variation come
Realize acquisition to signals of vehicles, thus will not climate influence, and since geomagnetism detecting sensor is only to ferromagnetism object
Body has reaction, i.e., only detects vehicular traffic, therefore erroneous detection can be effectively reduced (i.e. using the data of nonferromagnetic object as vehicle
Data processing).In addition, being converted to by the earth induction strength signal for obtaining geomagnetism detecting sensor through signal processor
The on-off model or level signal that source of early warning in various intelligent transportation systems can identify, so as to so that source of early warning
Warning information is directly made according to the on-off model or level signal that are converted to.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, the structure that can also be shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the structural block diagram of the utility model signals of vehicles acquisition testing control system first embodiment；
Fig. 2 is the schematic diagram in the utility model signals of vehicles acquisition testing control system concrete application；
Fig. 3 is the structural block diagram of the utility model signals of vehicles acquisition testing control system second embodiment；
Fig. 4 is the structural block diagram of the utility model signals of vehicles acquisition testing control system 3rd embodiment.
Description of symbols：
| Label | Title |
| 100 | Lane |
| 101 | The wireless geomagnetism detection sensor of first early warning position is set |
| 102 | The wireless geomagnetism detection sensor of second early warning position is set |
| 103 | The wireless geomagnetism detection sensor of third early warning position is set |
| R1 | The range that wireless geomagnetism detection sensing 101 can detect |
| R2 | The range that wireless geomagnetism detection sensing 102 can detect |
| R3 | The range that wireless geomagnetism detection sensing 103 can detect |
| 200 | Wireless geomagnetism communication base station |
| 300 | Vehicle |
The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, fall within the protection scope of the utility model.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute in the utility model embodiment
It is only used for explaining in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, such as
When the fruit particular pose changes, then directionality instruction also correspondingly changes correspondingly.
In addition, the description for being related to " first ", " second " etc. in the present invention is used for description purposes only, and cannot understand
For its relative importance of indication or suggestion or implicitly indicate the quantity of indicated technical characteristic.Define as a result, " first ",
The feature of " second " can explicitly or implicitly include at least one of the features.In addition, the technical side between each embodiment
Case can be combined with each other, but must be based on can be realized by those of ordinary skill in the art, when the combination of technical solution
Occur it is conflicting or when cannot achieve should people think that the combination of this technical solution is not present, also do not wanted in the utility model
Within the protection scope asked.
The utility model proposes a kind of signals of vehicles acquisition testing control systems.
Referring to Fig.1, Fig. 1 is the structural block diagram of the utility model signals of vehicles acquisition testing control system first embodiment,
As shown in Figure 1, the signals of vehicles acquisition testing control system includes：Geomagnetism detecting sensor 1001 and signal processor 1002.
Wherein, the geomagnetism detecting sensor 1001 is communicated to connect with the signal processor 1002, the geomagnetism detecting
Sensor 1001 is embedded under road surface locating for lane.
Specifically, the geomagnetism detecting sensor 1001 in this example, enters predetermined detection area for obtaining vehicle
When, the earth induction strength signal that magnetic field intercepts generate over the ground, and the earth induction strength signal is transmitted to the signal
Processor 1002.
It should be noted that predetermined detection area described in the present embodiment is with the geomagnetism detecting sensor 1001 peace
Holding position is the center of circle, and with preset length, the maximum distance that the geomagnetism detecting sensor such as selected is able to detect that determines for radius
Region.
The signal processor 1002 in this example, for being converted to the earth induction strength signal received
On-off model or level signal.
In addition, it is noted that being routed to reduce, the geomagnetism detecting in the signals of vehicles acquisition testing control system
Sensor 1001 can use wireless geomagnetism detection sensor, and signal processor 1002 can use wireless geomagnetism communication base station,
The transmission of data is realized using the wireless communication module of each device inside.
In addition, in order to guarantee that earth induction strength signal is transmitted to wireless geomagnetism communication base by wireless geomagnetism detection sensor
During standing, the loss of signal is reduced, can be transmitted using dedicated radio band, for example passes through setting wireless geomagnetism
Detection sensor works in the radio band of 433MHz, so as to so that wireless geomagnetism detection sensor passes through the wireless of 433MHz
The earth induction strength signal is transmitted to wireless geomagnetism communication base station by frequency range.
Also for example, being worked by setting wireless geomagnetism detection sensor in the radio band of 2.4GHz, so as to so that nothing
The earth induction strength signal is transmitted to wireless geomagnetism communication by the radio band of 2.4GHz by line geomagnetism detecting sensor
Base station.
Also for example, wireless geomagnetism detection sensor, which can be set, can work at the same time in the wireless of 433MHz and 2.4GHz
Frequency range, so as to so that wireless geomagnetism detection sensor according to the actual situation, by the radio band of 433MHz or 2.4GHz, is incited somebody to action
The earth induction strength signal is transmitted to wireless geomagnetism communication base station.
In addition, being mainly used for acquiring on lane by the signals of vehicles acquisition testing control system provided in this present embodiment
The signals of vehicles of traveling, thus the wireless geomagnetism detection sensing selected is specially flow type wireless geomagnetism detection sensor, thus
The comprehensive traffics data such as vehicle flowrate, flow velocity, occupation rate, time headway can be preferably obtained in dynamic traffic.
During the signals of vehicles acquisition testing control system provided in the present embodiment in order to facilitate understanding is applied in practice
Deployment and working method, are specifically described below in conjunction with Fig. 2.
As shown in Fig. 2, in the concrete realization, staff can be on the lane 100 for needing to carry out signals of vehicles acquisition
Several wireless geomagnetism detection sensors are set, in Fig. 2 for 3, respectively wireless geomagnetism detection sensor 101, wirelessly
Magnetic measurement sensor 102, wireless geomagnetism detection sensor 103.
Wherein, the range that wireless geomagnetism detection sensor 101 can be detected is R1,102 institute of wireless geomagnetism detection sensor
The range that can be detected is R2, and the range that wireless geomagnetism detection sensor 103 can be detected is R3.
It should be understood that the range of R1, R2, R3 and the wireless geomagnetism detection sensor of selection can be detected when working
Maximum distance it is related, in the concrete realization, those skilled in the art can according to need selection suitable wireless geomagnetism inspection
Survey sensor.
In addition, the vehicle 300 travelled on lane shown in Figure 2 is to travel from right to left, thus wireless geomagnetism detection passes
The first early warning position that sensor 101 is arranged, peristoma are 10 meters on the right side of the intersection of positions, i.e., when vehicle 300 is to intersection
When the direction running of crossing, wireless geomagnetism detection sensor 101 detects at first, wireless geomagnetism detection sensor 102 be arranged the
Two early warning positions, can be the position apart from 5 meters on the right side of intersection, and the third that wireless geomagnetism detection sensor 103 is arranged is pre-
Alert position can be the position apart from 2 meters on the left of intersection, i.e., when wireless geomagnetism detection sensor 103 detects that vehicle 300 is cut
Earth induction strength signal caused by earth's magnetic field is cut, indicates that vehicle 300 has moved away from intersection.
In addition, in order to which the earth induction strength signal for guaranteeing that above-mentioned 3 wireless geomagnetism detection sensors are got can turn
It is changed to on-off model or level signal, it is therefore desirable to when disposing wireless geomagnetism detection sensor, build in preset location
Vertical one or more wireless geomagnetism communication base station 200, so that being embedded in the wireless geomagnetism detection sensor under 100 road surface of lane
101, wireless geomagnetism detection sensor 102, wireless geomagnetism detection sensor 103 can be established with wireless geomagnetism communication base station 200
Communication connection, and after getting earth induction strength signal, it can smoothly be transmitted to 200 turns of line earth magnetism communication base station
It changes.
It should be noted that the above is only for example, the technical solution to the application does not constitute restriction, specific real
In existing, those skilled in the art, which can according to need, to be configured, herein with no restrictions.
By foregoing description it is not difficult to find that the signals of vehicles acquisition testing control system provided in the present embodiment, by adopting
When land used magnetic measurement sensor acquisition vehicle enters predetermined detection area, the earth induction intensity that magnetic field intercepts generate over the ground is believed
Number, i.e., using earth magnetic field ferromagnetic object (vehicle) by when variation realize the acquisition to signals of vehicles, therefore will not
The influence of climate, and since geomagnetism detecting sensor only has reaction to ferromagnetic object, i.e., vehicular traffic is only detected, therefore
Erroneous detection can be effectively reduced (i.e. using the data of nonferromagnetic object as vehicle data processing).In addition, by the way that earth magnetism is examined
It surveys the earth induction strength signal that sensor obtains and is converted to the source of early warning in various intelligent transportation systems through signal processor
The on-off model or level signal that can be identified, so as to so that the on-off model that source of early warning directly basis is converted to
Or level signal makes warning information.
Further, as shown in figure 3, proposing the utility model signals of vehicles acquisition testing control system based on first embodiment
The second embodiment of system, in the present embodiment, in order to facilitate intelligent transportation system, such as rail traffic crossing safety management system energy
It is enough that resulting on-off model or level signal progress early warning, the generation to avoid traffic accident, vehicle are converted according to signal processor
Signal processor 1002 in signal acquisition testing control system is converted by the earth induction strength signal received
After on-off model or level signal, using any one in RS232 interface, RS485 interface, Ethernet interface or it can appoint
The on-off model or the level signal are transmitted to the dress of the early warning in the safety management system of rail traffic crossing by meaning combination
2001 are set, so that the prior-warning device 2001 is receiving the on-off model or the level signal, and is received described
Other in the safety management system of rail traffic crossing check equipment, as infrared detection sensor is detecting pedestrian close to lane
When the detection signal of Shi Shengcheng, warning information is played.
In addition, in the concrete realization, vehicle distances alarm point (such as distance can determine for the ease of prior-warning device 2001
Intersection or the more section of flow of the people, vehicle flowrate) distance, to make different early warning according to different distances
Information, the geomagnetism detecting sensor used in this example can be the geomagnetism detecting sensor with fixed identifier, i.e. lane
The geomagnetism detecting sensor of upper different location setting all has unique distinguishing mark, and then signal processor 1002 again will conversion
When the resulting on-off model or the level signal are transmitted to prior-warning device 2001, the fixed of oneself can also be identified
Number be transmitted to prior-warning device 2001, thus make prior-warning device 2001 receive the on-off model or the level signal and
After the fixed identifier, the distance of vehicle distances alarm can be fast and accurately determined, and make corresponding warning information.
Specifically, prior-warning device 2001 is receiving the on-off model or the level signal and the fixed identification
After number, determine that the mode of the distance of vehicle distances alarm can be as described below：
Firstly, searching the fixed identifier pair in the first mapping table prestored according to the fixed identifier
The location information answered.
Then, according to the on-off model or the level signal, institute is searched in the second mapping table prestored
State on-off model or the corresponding first distance apart from the geomagnetism detecting sensor 1001 of the level signal.
Finally, determining the vehicle distances alarm point according to the location information and the first distance that find
Then distance makes corresponding warning information according to the distance of distance.
Such as be phonetic alarm in prior-warning device 2001, such as when buzzer, loudspeaker equipment, if had received
Other check equipment, such as the detection signal that infrared detection sensor is generated when detecting pedestrian close to lane, and determine
The distance of the vehicle distances alarm point is 10 meters, then plays " motor vehicle, which will be sailed, to be come, and is please passed through with caution "；If it is determined that institute
The distance for stating vehicle distances alarm point is 2 meters, then plays phonetic warnings information such as " motor vehicle to be ready passing through, and please bear with ".
It such as, is also alarm lamp in prior-warning device 2001, when such as red greenish-yellow three colors alarm lamp, if having received other
It checks equipment, such as the detection signal that infrared detection sensor is generated when detecting pedestrian close to lane, and determines described
The distance of vehicle distances alarm point is 10 meters, then lights the amber light of alarm lamp, prompts pedestrian that will have motor vehicle to sail and comes；Such as
The distance for the vehicle distances alarm point that fruit determines is 2 meters, then puts sending out a warning for alarm lamp, is prompting pedestrian's motor vehicle just
Pass through；If it is determined that the distance of the vehicle distances alarm point be then to light street lamp far from 2 meters of alarm lamp, prompt passing
Pedestrian's motor vehicle is separate, can pass through.
Also such as, prior-warning device 2001 be LED display when, if having received other check equipment, such as it is infrared
The detection signal that detection sensor is generated when detecting pedestrian close to lane, and the vehicle distances alarm point determined
Distance is 10 meters, then display " motor vehicle, which will be sailed, to be come, and is please passed through with caution " on LED display；If it is determined that the vehicle
The distance of distance alarm point is 2 meters, then shows that texts such as " motor vehicle to be ready passing through, and please bear with " are pre- on LED display
Alert information.
Also such as, prior-warning device 2001 be above-mentioned three kinds when, if having received other check equipment, such as infrared inspection
Survey the detection signal that generates when detecting pedestrian close to lane of sensor, and the vehicle distances alarm point determined away from
From rear, then the phonetic alarm, the alarm lamp, the LED display make corresponding early warning simultaneously to root, such as both broadcast language
Sound warning information, and light corresponding alarm lamp and show corresponding warning information on LED display.
It should be noted that the above is only for example, the technical solution to the application does not constitute restriction, specific real
In existing, those skilled in the art, which can according to need, to be configured, herein with no restrictions.
In addition, RS232 interface described in the present embodiment, RS485 interface are that communication on signal processor 1002 connects
Mouthful.
In specific implementation, RS232 interface is usually gone out with the kenel of 9 pins (DB-9) or 25 pins (DB-25)
It is existing, also referred to as asynchronous transmission standard interface in the field of business, since its is cheap, programming is easy, and can make than other interfaces
With longer conducting wire, therefore it can guarantee the construction cost and application range of this system.
RS485 interface can then guarantee that signal processor 1002 can be realized networking, and then facilitate signal processor 1002
With the communication of other equipment.
About RS232 interface, the use of RS485 interface, those skilled in the art can according to need selection, herein not
It repeats, is also not particularly limited again.
Further, as shown in figure 4, proposing the utility model signals of vehicles acquisition testing control system based on first embodiment
The 3rd embodiment of system, in the present embodiment, in order to further improve the application of intelligent transportation system, signals of vehicles acquisition testing
Signal processor 1002 in control system by the earth induction strength signal received be converted to on-off model or
After level signal, Ethernet interface, Wireless Fidelity (WIreless-FIdelity, WI-FI) interface, mobile phone row can be utilized
Dynamic communication standard (such as 4G network, 5G network) interface, purple peak agreement (Zigbee, a kind of short distance, low-power consumption wireless communication association
View) any one or any combination in interface, the on-off model or the level signal are transmitted to vehicle management and put down
Platform 3001, so that administrative staff can understand the operation conditions of vehicle in time, and according to travel condition of vehicle and ambient enviroment, and
When adjust operational mode, such as slow down, postpone traveling.
The above is only the preferred embodiment of the present invention, and therefore it does not limit the scope of the patent of the utility model,
It is all under the inventive concept of the utility model, equivalent structure made based on the specification and figures of the utility model becomes
It changes, or directly/be used in other related technical areas indirectly and be included in the scope of patent protection of the utility model.
Claims (8)
1. a kind of signals of vehicles acquisition testing control system, which is characterized in that including：Geomagnetism detecting sensor and signal processing
Device, the geomagnetism detecting sensor and the signal processor communicate to connect, and the geomagnetism detecting sensor is embedded in lane institute
Under the road surface at place；
The geomagnetism detecting sensor, when entering predetermined detection area for obtaining vehicle, over the ground magnetic field intercepts generate earth magnetism
Induction signal, and the earth induction strength signal is transmitted to the signal processor, the predetermined detection area is
Using the geomagnetism detecting sensor mounting location as the center of circle, using the preset length region determining as radius；
The signal processor, for the earth induction strength signal received to be converted to on-off model or level letter
Number.
2. signals of vehicles acquisition testing control system as described in claim 1, which is characterized in that the geomagnetism detecting sensor
For wireless geomagnetism detection sensor.
3. signals of vehicles acquisition testing control system as claimed in claim 2, which is characterized in that the wireless geomagnetism detection passes
Radio band of the sense device working in 433MHz；
Correspondingly, the wireless geomagnetism detection sensor is by the radio band of 433MHz, by the earth induction strength signal
It is transmitted to the signal processor.
4. signals of vehicles acquisition testing control system as claimed in claim 2, which is characterized in that the wireless geomagnetism detection passes
Radio band of the sense device working in 2.4GHz；
Correspondingly, the wireless geomagnetism detection sensor is by the radio band of 2.4GHz, by the earth induction strength signal
It is transmitted to the signal processor.
5. signals of vehicles acquisition testing control system as claimed in claim 2, which is characterized in that the wireless geomagnetism detection passes
Sense is flow type wireless geomagnetism detection sensor.
6. such as the described in any item signals of vehicles acquisition testing control systems of claim 2 to 5, which is characterized in that the signal
Processor is wireless geomagnetism communication base station.
7. signals of vehicles acquisition testing control system as claimed in claim 6, which is characterized in that the wireless geomagnetism communicates base
Station is also used to using RS232 interface, RS485 interface, any one or any combination in Ethernet interface, by the switching value
Signal or the level signal are transmitted to the prior-warning device in the safety management system of rail traffic crossing.
8. signals of vehicles acquisition testing control system as claimed in claim 6, which is characterized in that the wireless geomagnetism communicates base
Station is also used to using in Ethernet interface, wireless fidelity interface, mobile phone mobile communication standard interface, purple peak protocol interface
Any one or any combination, are transmitted to vehicle management platform for the on-off model or the level signal.
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| CN201820741888.8U CN208110835U (en) | 2018-05-17 | 2018-05-17 | Signals of vehicles acquisition testing control system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112389504A (en) * | 2019-08-12 | 2021-02-23 | 李辉 | Locomotive positioning detection method, device, server and system |
| CN114298068A (en) * | 2021-12-29 | 2022-04-08 | 中国电信股份有限公司 | Vehicle door control system, method, device, electronic equipment and storage medium |
-
2018
- 2018-05-17 CN CN201820741888.8U patent/CN208110835U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112389504A (en) * | 2019-08-12 | 2021-02-23 | 李辉 | Locomotive positioning detection method, device, server and system |
| CN114298068A (en) * | 2021-12-29 | 2022-04-08 | 中国电信股份有限公司 | Vehicle door control system, method, device, electronic equipment and storage medium |
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Effective date of registration: 20200102 Address after: 430074 10 / F, building A3, software industry phase III, No. 1, Guanshan Avenue, Donghu New Technology Development Zone, Wuhan, Hubei Province Patentee after: Wuhan CITMS High-tech Co., Ltd. Address before: 430000 Hubei Wuhan East Lake New Technology Development Zone, 1 East Road, No. 1, 1.2 phase 1-3, 01 floor, B1 building, Optics Valley business mansion. Patentee before: Wuhan Euro Ni Tai Technology Co., Ltd. |
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