CN102325387A - Streetlight light cluster type wireless network control system based on wireless sensor network - Google Patents
Streetlight light cluster type wireless network control system based on wireless sensor network Download PDFInfo
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Abstract
The invention discloses a streetlight light cluster type wireless network control system based on a wireless sensor network. The wireless network control system is used for detecting the motion states of vehicles by arranging sensor nodes at two sides of a road, sending the motion states of the vehicles to actuator nodes additionally arranged on streetlights in a wireless Ad Hoc network multi-hop communication manner; each actuator node is used for automatically regulating the streetlights in a safety distance range in front of the vehicles to be highly bright and the streetlights behind the vehicles to be lowly bright in a network coordination manner according to the motion states of the vehicles on a current road, so as to realize the cluster control on the streetlight light; and the wireless network control system is accessed to the internet through wireless network nodes, sends condition information of various nodes to a control center in real time, and receives control information from a remote control center. Compared with the traditional streetlight light control system, the streetlight light cluster type wireless network control system can be used for automatically regulating the streetlights according to the motion states of the vehicles to realize illumination on demand, thereby saving electric energy.
Description
Technical field
The present invention relates to fields such as cordless communication network, illumination, belong to a kind of based on radio sensing network (Wireless Sensor and Actuator Network, road light concentrating type wireless network control system WSAN).
Background technology
Urban road light control at present is mainly with light-operated [1; 2] and time control [3] dual mode be main, promptly detect a day luminous intensity and be implemented in and open street lamp at dusk, close street lamp or use single-chip microcomputer to store local sun set/raise time and accomplish control in the morning through photo resistance, photocell.But according to our investigation, major urban arterial highway is at 1:00 AM to 5 in this time period, and vehicle flowrate is quite rare, and when not having vehicle ', brightness that fully can be through reducing road is to reach purpose of energy saving.According to human visual system (HVS) theory, human eye feels to have the logarithm non-linear nature [4,5,6] to brightness, reduces by 50% luminous power, and human eye perceives brightness changes less than half the.And for street lamp under the situation that does not have vehicle to pass through, only need that street lamp is maintained minimum brightness and get final product.According to statistics, China's road lighting electricity consumption accounts for 2%～3% of gross generation, and the lighting energy saving transformation is necessary very much so carry out as required to street lamp.
The above-mentioned pertinent literature of mentioning:
[1] Yang Jinhuan, Chen Zhonghua. the design of light-operated solar street light [J]. solar energy, 2002 (5): 18-22
[2] to quick, Xu Yang, Cui Ping. based on wireless light-operated controller for road lamp design [J]. automation and instrument, 2007 (5): 41-43.
[3] Wu Lei, Wang Yubiao, the conventional road Lighting Design research [J] in city. lamp and illumination, 2007,32 (2): 40-43.
Hall?Charles?F，Hall?Ernest?L.A?nonlinear?model?for?the?spatial?characteristics?of?the?human?visual?system[J].IEEE?Transactions?on?Systems，Man?and?Cybernetics，1977，7(3)：161-170.
Liu Weiqi, Feng Rui, Zhou Fengkun. the relation [J] of Munsell colour system and human eye brightness. optical precision engineering, 1998,3 (6): 31-35.
Yao Juncai, Shen Jing, Wang Jianhua. the interior experimental study [J] of cathode-ray tube display brightness range to human-eye visual characteristic. Acta Physica Sinica, 2008,57 (07): 4034-4051.
Summary of the invention
The purpose of this invention is to provide a kind of road light concentrating type wireless network control system based on radio sensing network.
To achieve these goals, the technical scheme that the present invention adopted is:
A kind of road light concentrating type wireless network control system based on radio sensing network; Comprise sensor node, actuator node, gateway node and tele-control system; It is characterized in that motion state through sensor detected vehicle; Automatically street lamp is controlled, realized illumination as required, control method comprises following step:
(1) through places the motion state that sensor node detects vehicle in the road both sides;
(2), the running status of vehicle is sent to the actuator node that is installed on each street lamp with wireless self-organization network multi-hop communication mode;
(3) each actuator node is according to the running status of vehicle on the current road, with the mode of network cooperating, and the street lamp in the high bright vehicle front safe distance scope automatically, the street lamp of low bright rear view of vehicle is realized the concentrating type control to road light.
(4) the street lamp lamp light control system inserts the Internet through gateway node, sends each node condition information to control centre in real time, accepts the control information of remote control center simultaneously.
Said (1) step comprises following components:
A, use single-chip microcomputer carry out amplitude modulation(PAM) to infrared emission signal or ultrasonic emitting signal, and receiving end signal is carried out coherent computing, to filter the interference of occurring in nature, the robustness of enhanced system;
Fired infrared receiver that B, use were modulated or ultrasonic emitting receiving system have judged whether vehicle blocking-up or reflective infrared signal or ultrasonic signal through detection;
C, receive that according to checkout gear the time of vehicle blocking-up or reflected signal confirms the position of vehicle, and confirm speed, the size information of vehicle in view of the above.
Said (2) step comprises following components:
A, road transducer/actuator node on both sides of the road utilizes wireless transport module, forms a kind of topological structure that uses banded route;
B, the node that detects vehicle and other node switching information, and speed, the size information of the vehicle that obtains be sent to the actuator node.
Said (3) step comprises following components:
A, actuator node are confirmed the safe distance of vehicle according to control informations such as the car speed that obtains, sizes, produce control signal corresponding and drive street lamp, realize the control to street lamp brightness;
Form network between B, actuator and the adjacent node and carry out co-operation, realize concentrating type control street lamp.
Said (4) step is specially:
A, gateway node receive the information of each transducer, actuator node through wireless mode;
B, gateway node through network access module, send to the information that receives on the Internet with the information of each node;
C, remote control center receive the information of gateway node, and come out through the graphical display interface display;
D, remote control center are controlled single street lamp or all brightness of street lamp to the gateway node transmitting control commands;
After E, gateway node are received control command, control command is sent to transducer, the actuator node of whole or appointment with the mode of inundation or banded route.
Innovative point of the present invention is and can adjusts the street lamp state automatically according to situation such as the position of vehicle, speed, has both guaranteed the safety of night running, again can energy savings; Street lamp is in the low-light level state rather than cuts out, avoid frequent switch, prolong the street lamp life-span; Wireless senser/actor network and the Internet are combined, make things convenient for main frame that street lamp is managed.
The present invention has characteristics such as obvious, the intelligent degree height of energy-saving effect, forms the concentrating type wireless network through the wireless transmission chip between the node, need not to lay holding wire; Can insert the Internet, administrative staff can manage street lamp like a cork and need not to set up dedicated network.So no matter be to make novel energy-saving road lamp or existing street lamp is transformed, can not increase bigger extra cost, practical.
Description of drawings
Fig. 1 is a theory diagram of the present invention.
Fig. 2 is a principle schematic of the present invention.
Fig. 3 is measurement of vehicle speed of the present invention, big or small principle schematic.
Embodiment
Below in conjunction with accompanying drawing the present invention is made further detailed description.
A kind of road light concentrating type wireless network control system based on radio sensing network comprises:
Vehicle detection: the mode that adopts infrared detection.Design a transmitting node and a receiving node on both sides of the road respectively, can unobstructedly be received node in the infrared signal that does not have to launch under the situation of vehicle and receive; When vehicle ', IR is blocked, thereby has realized vehicle detection.
Street lamp brightness is regulated: be used for street lamp is carried out light control.Use light fixture to mainly contain high-pressure sodium lamp, LED lamp, fluorescent lamp and incandescent lamp etc. at present, their light regulating circuit has nothing in common with each other.
Network control: node is divided into transducer/actuator node and two parts of aggregation node among the present invention.Transducer/actuator node adopts the MSP430 chip of low-power consumption as main control chip, and transducer/actuator node has wireless routing function, and road transducer has on one side constituted a banded route network of static state.Aggregation node adopts the STM32F103VCT6 chip of ST Microelectronics, supports the 10M/100M adaptive network, supports that management node carries out remote access to it through the Internet.
The distribution of sensor node of the present invention has certain rules: node all is distributed on the straight line on both sides of the road, is similar to two ribbon routes; And the adjacent node on the two ribbon routes can carry out communication.Designed a kind of banded Routing Protocol according to this rule, satisfied the lamp that can turn on vehicle front when detecting vehicle rapidly, receive Control Node requirements such as control..
Concrete transmission means is following:
(1) aggregation node is broadcasted after receiving the group control information of administrative center.Make system can force to control street lamp under special circumstances and get into Gao Liang, low bright or closing state.Guaranteed that same message need not repeat to send.Because wireless senser/actor network is comparatively responsive to the consumption of energy, can combine the algorithm that floods of some conserve energy of topology use of node among the present invention again.
(2) each node carries out multicast after measuring vehicle, and gives administrative center through aggregation node with feedback information.Administrative center analyzes detection case, and to aggregation node transmission group control messages, aggregation node carries out multicast according to information in respective sets as required.Guaranteed the independence of message between group, do not influenced each other.
(3) administrative center controls individual node or certain node need be to administrative center's feedback information the time at needs, makes administrative center and individual node carry out clean culture through aggregation node.Control and response have been realized each node is inquired about in time.
Concentrating type control method of the present invention is:
To carry out concentrating type control to street lamp, at first will obtain the information such as speed, position and size of vehicle, and then confirm to turn on that lamp where, how long turn on the lamp (number that promptly turns on the light) of distance.The present invention obtains the size information of vehicle through the length that detects vehicle.Vehicle is in difference position constantly.Like Fig. 3, establishing the speed of vehicle between node 1 and node 2 is v, and the length of vehicle is L1, and the distance between the node is L2.T1, t2, t3 constantly the state of vehicle like figure.T1 constantly vehicle stop the infrared sensor of node 1, node 1, node 2 pick up counting, and send the message that detects vehicle to node 2; T2 constantly vehicle stop to stop the infrared sensor of node 1, node 1 stops timing, the time interval is Δ t1; Detect vehicle at t3 moment node 2, node 2 stops timing, and the time interval is Δ t2.
Then have:
Δt
1*v＝L
1
Δt
2*v＝L
2
Constitute the equation group with 5 parameters, wherein Δ t1, Δ t2 are known parameters.If the length L 2 between node 1 and the node 2 is also known, the speed v and the length that then can obtain vehicle are L1:
Chip for the wireless transmission chip belt RSSI that forms node (Received Signal Strength Indication receives the signal strength signal intensity indication) function can adopt the method that combines packet loss and RSSI to find range to obtain the distance L 2 between the node.Generally speaking, also can adopt the method for importing an average in advance to come the distance L 2 between the defined node.
After the speed v of acquisition vehicle and length are L1,, then can define a function if the street lamp quantity of Gao Liang is N:
N＝f(v，L1).
Wherein function f is the speed v of vehicle and the positive correlation function that length is L1, and concrete parameter can obtain according to practical experience.Obtaining behind the high bright quantity N is the state of may command street-lamp node, realizes cluster control.When vehicle flowrate is more, can temporarily forbid power saving function.
The content of not doing detailed description in this specification belongs to professional and technical personnel's known prior art in this area.
Claims (5)
1. road light concentrating type wireless network control system based on radio sensing network; Comprise sensor node, actuator node, gateway node and tele-control system; It is characterized in that motion state through sensor detected vehicle; Automatically street lamp is controlled, realized illumination as required, control method comprises following step:
(1) through places the motion state that sensor node detects vehicle in the road both sides;
(2), the running status of vehicle is sent to the actuator node that is installed on each street lamp with wireless self-organization network multi-hop communication mode;
(3) each actuator node is according to the running status of vehicle on the current road, with the mode of network cooperating, and the street lamp in the high bright vehicle front safe distance scope automatically, the street lamp of low bright rear view of vehicle is realized the concentrating type control to road light.
(4) the street lamp lamp light control system inserts the Internet through gateway node, sends each node condition information to control centre in real time, accepts the control information of remote control center simultaneously.
2. the road light concentrating type wireless network control system based on radio sensing network as claimed in claim 1, it is characterized in that: (1) step comprises following components:
A, use single-chip microcomputer carry out amplitude modulation(PAM) to infrared emission signal or ultrasonic emitting signal, and receiving end signal is carried out coherent computing, to filter the interference of occurring in nature, the robustness of enhanced system;
Fired infrared receiver that B, use were modulated or ultrasonic emitting receiving system have judged whether vehicle blocking-up or reflective infrared signal or ultrasonic signal through detection;
C, receive that according to checkout gear the time of vehicle blocking-up or reflected signal confirms the position of vehicle, and confirm speed, the size information of vehicle in view of the above.
3. the road light concentrating type wireless network control system based on radio sensing network as claimed in claim 1, it is characterized in that: (2) step comprises following components:
A, road transducer/actuator node on both sides of the road utilizes wireless transport module, forms a kind of topological structure that uses banded route;
B, the node that detects vehicle and other node switching information, and speed, the size information of the vehicle that obtains be sent to the actuator node.
4. the road light concentrating type wireless network control system based on radio sensing network as claimed in claim 1, it is characterized in that: (3) step comprises following components:
A, actuator node are confirmed the safe distance of vehicle according to control informations such as the car speed that obtains, sizes, produce control signal corresponding and drive street lamp, realize the control to street lamp brightness;
Form network between B, actuator and the adjacent node and carry out co-operation, realize concentrating type control street lamp.
5. the road light concentrating type wireless network control system based on radio sensing network as claimed in claim 1, it is characterized in that: (4) step is specially:
A, gateway node receive the information of each transducer, actuator node through wireless mode;
B, gateway node through network access module, send to the information that receives on the Internet with the information of each node;
C, remote control center receive the information of gateway node, and come out through the graphical display interface display;
D, remote control center are controlled single street lamp or all brightness of street lamp to the gateway node transmitting control commands;
After E, gateway node are received control command, control command is sent to transducer, the actuator node of whole or appointment with the mode of inundation or banded route.
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