CN102097011B - Cluster-intelligence traffic-flow control system - Google Patents

Abstract

The invention relates to a cluster intelligent traffic flow control system, which belongs to the field of intelligent traffic. A single vehicle in this system is equipped with a microcomputer device. The main control CPU interface of the microcomputer device is connected with a wireless data transmission module and a preprogrammed input module. Information transfer stations are set along the road and at intersections. The wireless transceiver devices of the information transfer station are connected to the computer connected, and the computer is respectively connected to the central monitoring station and the intersection signal light device through the data line, and the power of each vehicle-mounted wireless transceiver device is the same and is additionally equipped with a power amplifier activation circuit. The invention can realize information exchange between single vehicles, so that multiple vehicles can generate swarm intelligence, and at the same time, there is information exchange between multiple groups, so that the groups can negotiate with each other, pass the intersection with the best plan, and avoid traffic Conflict; the structure of this system is simple, and the scheme is feasible.

Description

Cluster Intelligent Traffic Flow Control System

technical field

The invention relates to a traffic flow control system, in particular to a cluster intelligent traffic flow control system, which belongs to the comprehensive technical field of vehicle and traffic control.

Background technique

With the continuous advancement of science and technology, intelligent transportation has become the mainstream of research. But the current traffic flow does not have the characteristics of swarm intelligence, but considering the future development, swarm intelligent transportation will become the direction of future development. As far as the current technical means are concerned, it has become a feasible technical solution to endow each car with intelligence, such as adding an intelligent chip to the car. When a large area of vehicles adopts intelligent chips, the traffic flow on the road has the possibility of cluster intelligence. For automobiles, smart chips with high performance can be installed, so that a single car has powerful computing power and mobility, but the limitation of its perception ability limits the development of its intelligence. Considering the car as a kind of mobile robot, at the same time drawing on the technology of mobile robot wireless transmission network to enable the information exchange between cars (Xue Han, Li Xun, Ma Hongxu, Journal of Sensing Technology, Real-time mobile robot in unknown environment based on wireless sensor network Path Planning, Vol. 21, No. 5, May 2008), realizing swarm intelligence, continuous and large-scale monitoring of the environment can provide the vehicle with real-time perception of the overall situation and improve the vehicle's control over the environment. On the other hand, the further development of the characteristics of swarm intelligence can enable more groups to have information exchange, so that the groups can negotiate with each other, pass the intersection with the best plan, and avoid traffic conflicts. Combining the advantages of individual intelligence and swarm intelligence, the two complement each other, which can not only improve the perception of the surrounding vehicles of a single vehicle, but also have the characteristics of mutual negotiation between groups, becoming a "smart" traffic flow. Groups with intelligent traffic flow will coordinate with each other, and the vehicles in the group will seek the best position to keep individual vehicles in the best safe state. It greatly improves the efficiency of traffic flow and provides a feasible solution for alleviating traffic congestion. How to invent the simplest and most reliable swarm intelligent traffic flow control system is an extremely important subject. Currently, there are not many related technologies or patents related to swarm intelligent traffic flow.

Contents of the invention

The technical problem to be solved by the present invention is to provide a cluster intelligent traffic flow control system. With the help of the intelligent device built into the vehicle, the vehicle has the characteristics of cluster intelligence. It can realize information exchange between individual vehicles and make multiple vehicles generate Swarm intelligence, at the same time, there is information exchange between multiple groups, so that the groups can negotiate with each other, pass the intersection with the best plan, and avoid traffic conflicts; the structure of this system is simple, and the plan is feasible.

The solution adopted to solve the technical problems of the present invention is: a single car is equipped with a microcomputer device, the main control CPU interface of the microcomputer device is connected with a wireless data transmission module and a pre-programmed input module, and information transfer stations are arranged along the road and at crossroads. The wireless transceiver device of the information transfer station is connected to the computer, and the computer is respectively connected to the central monitoring station and the intersection signal light device through the data line. Among them, the pre-programmed input module presets the swarm intelligence program, communicates with adjacent vehicles through the wireless data transmission module of the microcomputer device, judges the relative distance and relative orientation between the surrounding vehicles, and obtains swarm intelligence, and the microcomputer device of the cluster vehicle Through comparison and statistics, the power amplification activation circuit installed in the vehicle at the center can be activated at this time, and it can obtain the number and average speed of the vehicle group. The larger wireless data transmission power represents the vehicle and information of the group. Publish and exchange transfer station to conduct data exchange with other vehicle groups, and negotiate how to pass the intersection ahead. Since the wireless transceiver devices of other vehicles in this group maintain the same power as before, they do not participate in the data exchange between the information release and exchange transfer station and other vehicle groups. .

The main control CPU interface of the vehicle-mounted microcomputer device is also connected with a vehicle control drive module, which is respectively connected to the electric control devices of steering, braking, fuel distribution and speed change on the vehicle through data lines. When the microcomputer device is set in the automatic state, it can drive automatically with the vehicles in the group according to the cluster intelligent program; when the microcomputer device is set in the manual state, if the driver's operation violates the cluster intelligent program and will cause traffic accidents, the microcomputer The device can force the vehicle back to automatic state through the vehicle control driver module.

The main control CPU interface of the vehicle-mounted microcomputer device is also connected with an angle and distance input module, a vehicle condition signal input module, a display module, a man-machine interface module, a power management module, a path target setting module, a GPS navigator and a data storage module. The angle and distance input module can be better used to judge the relative distance and relative orientation between the surrounding vehicles; the vehicle condition signal input module is realized by a plurality of instrument parameters and sensors of the car itself, and the instrument parameters in the car, such as the car Important parameters such as instantaneous speed, oil pressure, engine speed, gear position, and vehicle total mass are converted into digital signal inputs; the display module contains two display screens, one is used to display the driving route, and the other is used to display adjacent vehicles The number, orientation and distance of the vehicle, the range of the safe space and the current running speed of the vehicle; the man-machine interface module is used for man-machine dialogue, and certain parameters can be set, and manual driving or semi-automatic driving can be selected; the power management module can Automobile smart devices require power supply and power management; the route target setting module can input the destination to be reached, the GPS navigator can automatically select the driving route according to the road conditions ahead, and the data storage module is used to store various information data of the vehicle.

The vehicle-mounted wireless data transmission module is equipped with a rotating shielding antenna. The structure of the antenna is to fix the antenna base on the roof, and the signal shielding cover is rotatably connected to the antenna base. The motor and the drive gear mesh with the inner ring gear on the inner wall of the signal shield. The signal receiving antenna is installed inside the signal shield. There is a signal receiving window on the side wall of the signal shield. The telescopic transmitting antenna protrudes from the top of the signal shield. An angle pulse induction tooth is arranged on the antenna base, and an angle pulse electromagnetic induction head connected with a wireless data transmission module is installed at a position corresponding to the angle pulse induction tooth on the antenna base. The antenna can greatly improve the information receiving accuracy of the vehicle, and only when the window of the signal receiving window is aimed at the adjacent vehicle, the signal receiving antenna can receive the signal from the adjacent vehicle.

The beneficial effect of the invention is that: by virtue of the intelligent device built in the vehicle, the vehicle has the characteristic of swarm intelligence. In this control system, there is information exchange between individual vehicles, and the information exchange enables multiple vehicles to generate swarm intelligence; there is also information exchange between multiple traffic groups, so that the groups can negotiate with each other to achieve the best The scheme passes through the intersection to avoid traffic conflicts. Combining the advantages of individual intelligence and swarm intelligence, it not only improves the perception of the surrounding vehicles of a single vehicle, but also has the characteristics of mutual negotiation between groups, becoming a "smart" traffic flow, which greatly Improved traffic flow efficiency.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the system of the present invention;

Fig. 2 is the connection schematic diagram of single automobile microcomputer device of the present invention;

Fig. 3 is a schematic diagram of the structure of the rotating shade antenna of the present invention.

Among Fig. 1～3: 1. Intersection signal light device, 2. Information transfer station, 3. Data line, 4. Vehicle group, 5. Driving vehicle, 6. Computer, 7. Network, 8. Central monitoring station, 9. Main Control CPU, 10. Angle and distance input module, 11. Vehicle condition signal input module, 12. Display module, 13. Preprogrammed input module, 14. Man-machine interface module, 15. Power management module, 16. Path target setting module , 17. Vehicle control drive module, 18. Data storage module, 19. Wireless data transmission module, 20. Microcomputer device, 21. GPS navigator, 22. Transmitting antenna, 23. Signal shielding cover, 24. Signal receiving antenna, 25 .Internal ring gear, 26. Drive gear, 27. Drive motor, 28. Angle pulse induction tooth, 29. Angle pulse electromagnetic induction head, 30. Signal receiving window, 31. Antenna base, 32. Rotary shielding antenna.

detailed description

The present invention will be further described below in conjunction with drawings and embodiments.

All put into single car microcomputer device 20 in every car, the signal strength that sends is identical. The interface of the microcomputer device 20 is configured with an angle and distance input module 10, a vehicle condition signal input module 11, a display module 12, a pre-programmed input module 13, a man-machine interface module 14, a power management module 15, an automobile control drive module 17, and a path target setting module. Fixed module 16, data storage module 18, wireless data transmission module 19 and GPS navigator 21. Wherein the pre-programmed input module 13 presets the swarm intelligence program, exchanges information with adjacent vehicles through the wireless data transmission module 19 of the microcomputer device 20, and obtains swarm intelligence. A single vehicle is provided with an angle and distance input module 10, which can determine The relative distance and relative orientation between the surrounding vehicles, through comparison and statistics, the vehicle in the central position obtains the quantity and average speed of the vehicle group 4, and the vehicle represents the vehicle of this group as an independent commander (other vehicles do not participate in the comparison Information release exchange transfer station 2 data exchange) for wireless data transmission, that is, on the one hand, communicate with the information release exchange transfer station, and on the other hand directly communicate with other vehicle groups, and negotiate how to pass the intersection ahead.

The angle and distance input module 10 of a single vehicle microcomputer device 20 is composed of a rotating shield antenna 32, a signal processing device, and a compass reference signal source. The rotary shielding antenna 32 is composed of a data transmitting antenna 22, a signal shielding cover 23, a signal receiving antenna 24, an internal ring gear 25, a driving gear 26, a driving motor 27, an angle pulse induction tooth 28, an angle pulse electromagnetic induction head 29, and a signal receiving window 30. The antenna base 31 is assembled. Its working process is that the drive motor 27 drives the drive gear 26 to rotate (see Figure 3), and the gear meshes with the ring gear 25 of the signal shield to make the signal shield 23 rotate. The shield is provided with a signal receiving window 30, only when When the window is aimed at the adjacent vehicle, the signal receiving antenna 24 can receive the signal from the adjacent vehicle. The rotation angle of the shield can be realized by the angle pulse induction teeth 28 on the lower edge of the shield. When the shield rotates, the angle pulse electromagnetic induction head 29 installed on the antenna base 31 senses that the magnetic flux changes, and gives a rotation angle signal pulse , the pulse is compared with the reference signal given by the compass to obtain the azimuth of the signal source, thereby obtaining the azimuth of adjacent vehicles, and according to the number of signal sources, it is known how many vehicles there are in the surrounding area. After obtaining the position and number of adjacent vehicles, the distance between the self-vehicle and the adjacent vehicles must be judged. Considering that the signals sent by the single automobile microcomputer device 20 in each automobile are the same in strength, it is only necessary to judge the signal by the signal processing device. The strength of the source can get the distance of adjacent cars.

The vehicle condition signal input module 11 is realized by a plurality of instrument parameters and sensors of the vehicle itself. Convert important parameters such as vehicle transient speed, engine oil pressure, engine speed, gear position, vehicle total mass and other important parameters in the vehicle into digital signals and input them to the vehicle condition signal input module 11. These parameters can be used to judge whether the vehicle is running normally , if the car is abnormal, it will give even a reminder, and at the same time inform other vehicles of the judgment result. Other vehicles will make predictions in advance and change the following distance based on the presence of abnormal adjacent cars. The vehicle speed and quality parameters are used to calculate the safe space distance of the own vehicle, and the safe space distance is transmitted to adjacent vehicles through the wireless data transmission module 19, so as to coordinate with each other and avoid safety accidents such as rear-end collisions.

The display module 12 includes two display screens. One shows the driving route, which is the display screen of the GPS navigator 21, and the destination to be reached can be input by the path target setting module 16, and the GPS navigator 21 can automatically select the driving path according to the road conditions ahead; the other display module is used for Displays the number, orientation and distance of adjacent vehicles, the range of safe space and the current running speed (indicated by the size of the color block in the arrow) and direction required by the vehicle.

The pre-programming input module 13 includes the intelligent automatic driving control program of the vehicle, the cluster intelligent program of the vehicle and the group negotiation green wave intelligent program.

The vehicle's intelligent automatic driving control program is used to control the vehicle to automatically avoid the front target and realize automatic driving, so that the vehicle has a high degree of intelligence, but this intelligence only exists in an independent individual, and cannot coordinate the relationship between itself and the vehicle group. It is also impossible to realize the coordination between groups; the swarm intelligence program of this car is a. Coordinate the relationship between its own vehicle and adjacent vehicles, find the most appropriate position of itself in the group, so that its own vehicle is in the best position; b .Realize the cluster effect, gather your own vehicles into a suitable group, and realize the self-aggregation of the group in the swarm intelligent system; c. Conduct information exchange, find out the vehicle at the center to exchange information with other groups on behalf of the group , coordinate how to smoothly pass through the front intersection without conflicting with other groups.

The specific implementation scheme is by means of the theory of swarm intelligence. Swarm intelligence refers to the characteristics of unpredictable global intelligent behaviors that emerge from simple individuals through local interactions. Individuals in the system can realize complex behavior patterns by interacting with other individuals and the environment only under local perception. Swarm intelligence takes advantage of swarms to find solutions to complex problems without centralized control and without providing a global model. This scheme can finally converge the individuals in the group within a certain range, and during the movement of the group, the individuals will also maintain a certain degree of closeness under the interaction.

For N individuals in the system, first assume that the perception range of each individual is r, for individual i, only other individuals within this range can have an effect on it, and this range is realized by the strength of the antenna receiving signal , the signal is less than a specified value, then no signal is collected, the observable set for individual i is the set of all individuals within its perception range S _i ={j|ρ( _xi -x _j )=|| _xi -x _j ||≤r, j∈Φ}, where ρ( _xi -x _j ) represents the distance between individual x _i and x _j , and Φ represents the set of all individuals in the group. The number of other individuals that individual i can perceive is expressed as N _i = |S _i |, and the central positions of all individuals within the observable range of individual i are The vehicle at the center represents the information exchange between this group and other groups. The realization of aggregation requires the interaction between individuals. When the individuals in the group perceive other individuals, in order to ensure that they can gather into groups, the easiest way is to introduce the gravitational force between individuals. Similarly, in order to avoid collisions with other individuals, when two bodies are close to a certain extent, they need to stay away from each other, so it is necessary to introduce repulsion between individuals. The linear attractive force f _a (x, y) and the bounded repulsive force f _r (x, y) between individuals x and y are defined as:

${\mathrm{<span\; class="notranslate">\; f</span>}}_{\mathrm{<span\; class="notranslate">\; a</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; the\; y</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\left\{\begin{array}{cc}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; a</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; the\; y</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ,</span>& \mathrm{<span\; class="notranslate">\; \&rho;</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; the\; y</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; <</span>\mathrm{<span\; class="notranslate">\; r</span>}\\ \mathrm{<span\; class="notranslate">\; 0</span>}<span\; class="notranslate">\; ,</span>& \mathrm{<span\; class="notranslate">\; \&rho;</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; the\; y</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \&Greater\; Equal;</span>\mathrm{<span\; class="notranslate">\; r</span>}\end{array}\right.$

${\mathrm{<span\; class="notranslate">\; f</span>}}_{\mathrm{<span\; class="notranslate">\; r</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; the\; y</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\left\{\begin{array}{cc}\mathrm{<span\; class="notranslate">\; bexp</span>}<span\; class="notranslate">\; (</span>\frac{<span\; class="notranslate">\; -</span>{<span\; class="notranslate">\; |</span><span\; class="notranslate">\; |</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; the\; y</span>}<span\; class="notranslate">\; |</span><span\; class="notranslate">\; |</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}{\mathrm{<span\; class="notranslate">\; c</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; the\; y</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ,</span>& \mathrm{<span\; class="notranslate">\; \&rho;</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; the\; y</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; <</span>\mathrm{<span\; class="notranslate">\; r</span>}\\ \mathrm{<span\; class="notranslate">\; 0</span>}<span\; class="notranslate">\; ,</span>& \mathrm{<span\; class="notranslate">\; \&rho;</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; the\; y</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \&Greater\; Equal;</span>\mathrm{<span\; class="notranslate">\; r</span>}\end{array}\right.$

Among them, a>0 and b>0 represent the coefficients of attraction and repulsion respectively; 0<c<r is the range of repulsion. The gravitational value between individuals within the observable range increases with the increase of the distance between them, And the repulsion value is reduced. From the definition of attractive force and repulsive force, it can be seen that individual i is only affected by the force of individuals in the perception area, and other individuals do not act on it. The safe space range Q(x, y)=kr can be defined, and the swarm intelligence can be obtained by modifying and programming according to the above formula.

The group negotiation green wave intelligent program is entered into the CPU through the pre-programmed input module 13 to form a group negotiation green wave intelligence, which can communicate with other vehicle groups, and notify the result of the negotiation to the communication transfer station, control the traffic lights, and ensure the crossing Realize dynamic green wave traffic control without conflicts.

The man-machine interface module 14 is used for man-machine dialogue, and some parameters can be set, and manual driving and semi-automatic driving can be selected.

The power management module 15 can perform power supply and power management according to the requirements of a single car smart device.

The automobile control driving module 17 sends the control instructions given by the CPU to the control driving equipment for driving the direction, brake, accelerator, clutch, and gear of the automobile to realize automatic driving.

The wireless data transmission module 19 is divided into two working states. ① When it is in a non-central position, it communicates with adjacent vehicles to realize swarm intelligence, and receives road condition information issued by the information transfer station 2. These road condition information include road friction coefficient, Road slope, curved road conditions, historical traffic flow, accident statistics, weather conditions, etc. After the vehicle receives these information, it can adjust the driving speed, following distance, etc. to ensure the safety of the vehicle; ②When it is in the center position, the power amplifier circuit If it is activated, it can communicate with the outside world on behalf of the group, and transmit the average speed of the vehicle group, the total mass of the vehicle group, the total number of the vehicle group, and the real-time position data of the vehicle group to the information transfer station 2, and transmit the data through the network 7 Send it back to the central monitoring station 8, and the central monitoring station 8 can intuitively see the position and moving speed of the vehicle group. On the other hand, the information exchange between groups can be carried out through the information transfer station 2. The group negotiation green wave intelligent program of module 13 communicates with other vehicle groups, and notifies the information transfer station 2 of the negotiation result, controls the traffic lights of the intersection signal light device 1, ensures no conflicts at crossings, and realizes dynamic green wave traffic control.

The specific working process of the cluster intelligent traffic control system: firstly, the vehicle must be equipped with a single vehicle microcomputer device 20 . In the process of driving, in the case of automatic driving, the vehicles will be automatically classified into groups according to the current driving path of GPS, and an appropriate distance will be maintained. In the case of manual driving, according to the prompt of the display module unit 12, the driver can also enter the group and be in an appropriate position while driving. Due to the exchange of information between groups, swarm intelligence is generated. When in a non-central position, communicate with adjacent vehicles to realize cluster intelligence and receive road condition information released by the information transfer station. These road condition information include road friction coefficient, road slope, curved road conditions, historical traffic flow, accident statistics, Weather conditions, etc. After the vehicle receives this information, it can adjust the driving speed, following distance, etc. to ensure the safety of the vehicle. When in the central position, the vehicle-mounted high-power wireless data transmission device is activated to communicate information with the outside world on behalf of the group, and the average speed of the vehicle group, the total mass of the vehicle group, the total number of the vehicle group, and the real-time position of the vehicle group The data is transmitted to the information transfer station 2, and the data is sent back to the central monitoring station 8 through the network, and the central monitoring station 8 can intuitively see the position and moving speed of the vehicle group; The information transfer station 2 conducts information exchange, communicates with other vehicle groups through the group negotiation green wave intelligent program of the pre-programmed input module 13, and notifies the information transfer station 2 of the result of the negotiation, controls the traffic lights of the intersection signal light device 1, and ensures crossing Realize dynamic green wave traffic control without conflicts.

Claims (4)

1. a cluster-intelligence traffic-flow control system, it is characterized in that: single vehicle configures microcomputer apparatus, the master cpu interface of microcomputer apparatus is connected with wireless data transfer module and pre-programmed load module, roadside and intersection are provided with information terminal, the wireless transmitter of information terminal is connected with computing machine, and computing machine connects central monitoring station and belisha beacon device respectively by data line, the power of each onboard wireless R-T unit is identical and be also configured with power amplification active circuit in addition, wherein pre-programmed load module has preset swarm intelligence program, information interchange is carried out by the wireless data transfer module of microcomputer apparatus and adjacent vehicle, calculate the relative distance between surrounding vehicles and relative orientation, troop the microcomputer apparatus of vehicle by comparison and statistics, the power amplification active circuit that the vehicle being in center fills is activated startup, the microcomputer apparatus of the vehicle of center obtains quantity and the average velocity of this vehicle group, and represent in-group vehicle and terminal and other vehicle group carries out data exchange.

2. cluster-intelligence traffic-flow control system according to claim 1, it is characterized in that: the master cpu interface of vehicle-mounted microcomputer apparatus is also connected with automobile and controls driver module, this module respectively connected turning on automobile by data line, brake, the electric control gear of fuel distributing and speed change.

3. cluster-intelligence traffic-flow control system according to claim 2, is characterized in that: the master cpu interface of vehicle-mounted microcomputer apparatus is also connected with angle and distance input module, vehicle condition signal input module, display module, human-machine interface module, power management module, path goal setting module, GPS navigator and data memory module.

4. cluster-intelligence traffic-flow control system according to claim 2, it is characterized in that: vehicle-mounted wireless data transfer module is configured with rotary type and covers antenna, the structure of this antenna is fixed antenna pedestal on roof, signal mask is rotatably connected on antenna base, antenna base is fixed wtih the drive motor being furnished with driven wheel, driven wheel engages with the ring gear of signal mask inwall, signal mask is built with signal receiving antenna, signal mask sidewall has Signal reception window, telescopic emitting antenna stretches out from signal mask top, signal mask is provided with angle pulse induction tooth, the angle pulse electromagnetic induction head be connected with wireless data transfer module is housed in the position of antenna base corresponding angle pulse induction tooth.