CN105551262A - Vehicle detection method based on wireless geomagnetic detector and apparatus thereof - Google Patents
Vehicle detection method based on wireless geomagnetic detector and apparatus thereof Download PDFInfo
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- CN105551262A CN105551262A CN201510980777.3A CN201510980777A CN105551262A CN 105551262 A CN105551262 A CN 105551262A CN 201510980777 A CN201510980777 A CN 201510980777A CN 105551262 A CN105551262 A CN 105551262A
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- 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
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Abstract
The invention discloses a vehicle detection method based on a wireless geomagnetic detector and an apparatus thereof. A problem that energy consumption of a repeater is large in the prior art is solved. The method comprises the following steps that transmission equipment receives a time synchronization signal at the beginning of a work period and time synchronization is performed according to time synchronization information; the transmission equipment sends vehicle detection information to control equipment in the work period so that the control equipment processes the vehicle detection information after receiving the vehicle detection information, wherein the time synchronization signal is the time synchronization signal forwarded and received by other nearby transmission equipment or is the time synchronization signal sent by the control equipment.
Description
Technical field
The present invention relates to wireless communication technology field, especially a kind of vehicle checking method based on wireless geomagnetism detecting device and device.
Background technology
Along with the quickening of domestic and international transport development paces, intelligent transportation has been the inevitable development direction of urban traffic control, is the importance alleviated traffic congestion, improve communications and transportation and the efficiency of management.Building intelligent transportation system is a long-term complicated systems engineering, but its basis is acquisition of road traffic information, excellent acquisition of road traffic information mode is the strong backing that Traffic Information is issued, also be the foundation stone of intelligent transportation system, therefore the Intelligent Transport Systems Construction in a lot of city is all using acquisition of road traffic information and issues as point of penetration.
Along with the development of Internet of Things, as a kind of emerging detection mode, wireless geomagnetism detecting device receives extensive concern in recent years, and wireless geomagnetism detecting device is as the important step of Intelligent Transport Systems Construction, and existing collecting vehicle information mode the most advanced is that wireless geomagnetism detects information of vehicles.When vehicle is by being embedded in the earth magnetism under road surface, cause the change of geomagnetic field magnetic flux, the sensor of geomagnetism detecting device detects the change of geomagnetic field magnetic flux, calculate information of vehicles accordingly, the traffic parameters such as the vehicle flowrate in a period of time, car speed, time occupancy can be drawn, and transfer to main control system, be uploaded to terminal server by main control system, to meet the needs of traffic control system.
Repeater, as the communication transferring equipment of geomagnetism detecting system, needs according to vehicle pass-through situation, the communication information at any time between transfer geomagnetism detecting device and receiver, and make repeater always in running order, power consumption is larger.When carrying out growing the collection of distance road traffic delay, because needs adopt multilevel relay device to extend communication distance, be generally battery because earth magnetism vehicle equipment is self-powered, electricity is limited, the energy consumption exorbitant expenditure of repeater.
Summary of the invention
The invention provides a kind of method and device of the vehicle detection based on wireless geomagnetism detecting device, large in order to solve repeater energy ezpenditure in prior art, and between geomagnetism detecting device interior joint, transmit the problem of data accuracy difference.
The embodiment of the present invention provides a kind of vehicle checking method based on wireless geomagnetism detecting device, comprising:
Transmission equipment is time of reception synchronizing signal when the work period starts, and carries out time synchronized according to described time synchronization information;
Described transmission equipment sends vehicle detecting information to opertaing device in the work period, processes after the described vehicle detecting information of reception to make described opertaing device to described vehicle detecting information; Wherein, described time synchronizing signal is that other transmission equipments neighbouring forward the time synchronizing signal received or the time synchronizing signal sent by described opertaing device.
The transmission equipment of the embodiment of the present invention works within the work period, ensure that the normal work of transmission equipment, and saved the energy consumption of transmission equipment, and first carry out time synchronized when the work period starts, ensure that when vehicle detecting information transmission starts, send the accuracy of vehicle detecting information, solve the problem that in prior art, repeater energy ezpenditure is large.
Further, described transmission equipment is time of reception synchronizing signal when the work period starts, and comprising:
Described transmission equipment converts duty when the work period starts to by dormant state, and time of reception synchronizing signal;
Described transmission equipment sends after vehicle detecting information to opertaing device in the work period, also comprises:
Described transmission equipment converts dormant state to by duty at the end of the work period, and stops Received signal strength and send signal.
In the embodiment of the present invention, transmission equipment receives synchronizing signal when the work period starts, and after the work period terminates, stops Received signal strength and send signal, makes outside the work period, transmission equipment does not receive and does not send signal, reduce further the energy consumption of transmission equipment.
Further, described transmission equipment sends vehicle detecting information to opertaing device in the work period, also comprises:
Described transmission equipment, according to the number of retransmissions of setting, sends vehicle detecting information to described main control equipment.
In the embodiment of the present invention, transmission equipment transmits according to the number of retransmissions set instead of fixing number of retransmissions, ensure that and the reliability that data are transmitted improves transfer efficiency.
Further, described transmission equipment, after carrying out time synchronized, also comprises:
Described transmission equipment, according to the time synchronizing signal received, determines signal quality value, and according to the corresponding relation of signal quality value and signal number of retransmissions, determines the number of retransmissions that described signal quality is corresponding;
The described transmission equipment number of retransmissions determined upgrades the number of retransmissions of setting themselves.
In the embodiment of the present invention, according to the corresponding relation of signal quality and number of retransmissions, adaptive adjustment number of retransmissions, ensure that in transmitting procedure, can retransmit according to the number of retransmissions preset if transmission data have been lost or damaged, ensure that the reliability that data are transmitted, and improve effectiveness.
Further, described transmission equipment is vehicle equipment or repeater.
In the embodiment of the present invention, transmission equipment is vehicle equipment in wireless geomagnetism detection system or is repeater, and then ensure that repeater and vehicle equipment low energy consumption work, and when repeater or vehicle equipment carry out data transmission, the stability of transmission data and accuracy.
Further, described transmission equipment is vehicle equipment; Described transmission equipment sends vehicle detecting information to opertaing device in the work period, comprising:
Described transmission equipment detected vehicle by time obtain vehicle detecting information, and vehicle detecting information directly sent to described opertaing device or send to described opertaing device by repeater;
Described transmission equipment is repeater; Described transmission equipment sends vehicle detecting information to opertaing device in the work period, comprising:
The vehicle detecting information that described transmission equipment will obtain from vehicle equipment or other repeaters, directly sends to described opertaing device or sends to described opertaing device by repeater.
In the embodiment of the present invention, if transmission equipment is vehicle equipment, then within the work period, vehicle is sent to repeater or opertaing device through the vehicle detecting information of out-of-date acquisition, to enable wireless geomagnetism detection system obtain vehicle detecting information normally, and keep the low-power consumption work of vehicle equipment; When transmission equipment is repeater, owing to there is multiple repeater in long range propagation process, then after acquisition vehicle detecting information, be sent to next repeater or opertaing device, to ensure that wireless geomagnetism detection system can obtain vehicle detecting information normally, and keep the low-power consumption work of repeater.
The embodiment of the present invention also provides a kind of vehicle checking method based on wireless geomagnetism detecting device, comprising:
Opertaing device periodic broadcasting time synchronizing signal, carries out time synchronized when the work period starts according to the time synchronization information received to make transmission equipment;
Described opertaing device, after the vehicle detecting information receiving the transmission of described transmission equipment, processes described vehicle detecting information.
In the embodiment of the present invention, broadcast synchronization signal in the opertaing device cycle, carry out synchronously to make transmission equipment according to synchronizing signal, and after receiving the vehicle detecting information of transmission equipment transmission, vehicle detecting information is processed, ensure that transmission equipment is when the work period starts and the synchronousness of opertaing device, improve the accuracy of data transmission, solve repeater energy ezpenditure in prior art large, and between geomagnetism detecting device interior joint, transmit the problem of data accuracy difference.
The embodiment of the present invention also provides a kind of vehicle detection apparatus based on wireless geomagnetism detecting device, comprising:
Lock unit, for the time of reception synchronizing signal when the work period starts, carries out time synchronized according to described time synchronization information;
Transmitting element, for sending vehicle detecting information to opertaing device in the work period, processes described vehicle detecting information after the described vehicle detecting information of reception to make described opertaing device;
Wherein, described time synchronizing signal is that other transmission equipments neighbouring forward the time synchronizing signal received or the time synchronizing signal sent by described opertaing device.
Further, described lock unit, also for:
Duty is converted to by dormant state when the work period starts, and time of reception synchronizing signal;
At the end of the work period, convert dormant state to by duty, and stop Received signal strength and send signal.
Further, described transmitting element, also for:
According to the number of retransmissions of setting, send vehicle detecting information to described main control equipment.
Further, described transmitting element, also for:
According to the time synchronizing signal received, determine signal quality value, and according to the corresponding relation of signal quality value and signal number of retransmissions, determine the number of retransmissions that described signal quality is corresponding;
The number of retransmissions of setting themselves is upgraded with the number of retransmissions determined.
Further, described device is vehicle equipment or repeater.
Further, described device is vehicle equipment; Described lock unit, for:
Detected vehicle by time obtain vehicle detecting information, and vehicle detecting information directly sent to described opertaing device or send to described opertaing device by repeater;
Described device is repeater; Described biography lock unit, for:
By the vehicle detecting information obtained from vehicle equipment or other repeaters, directly send to described opertaing device or send to described opertaing device by repeater.
The embodiment of the present invention also provides a kind of vehicle detection apparatus based on wireless geomagnetism detecting device, comprising:
Radio unit, for periodic broadcasting time synchronizing signal, carries out time synchronized when the work period starts according to the time synchronization information received to make transmission equipment;
Processing unit, for after the vehicle detecting information receiving the transmission of described transmission equipment, processes described vehicle detecting information.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly introduced, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
A kind of wireless geomagnetism vehicle detecting system schematic diagram that Fig. 1 provides for the embodiment of the present invention;
The opertaing device airtime synchronizing signal scope schematic diagram that Fig. 2 provides for the embodiment of the present invention;
The structural representation of a kind of vehicle detection apparatus based on wireless geomagnetism detecting device that Fig. 3 provides for the embodiment of the present invention;
The another kind that Fig. 4 provides for the embodiment of the present invention is based on the structural representation of the vehicle detection apparatus of wireless geomagnetism detecting device;
The another kind that Fig. 5 provides for the embodiment of the present invention is based on the schematic flow sheet of the vehicle checking method of wireless geomagnetism detecting device;
The schematic flow sheet of a kind of vehicle checking method based on wireless geomagnetism detecting device that Fig. 6 provides for the embodiment of the present invention;
The schematic flow sheet of the vehicle checking method based on wireless geomagnetism detecting device that Fig. 7 provides for the embodiment of the present invention one;
The schematic flow sheet of the vehicle checking method based on wireless geomagnetism detecting device that Fig. 8 provides for the embodiment of the present invention two.
Embodiment
In order to make the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail, and obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment of the present invention transmission equipment is time of reception synchronizing signal when the work period starts, and carries out time synchronized according to described time synchronization information; Described transmission equipment sends vehicle detecting information to opertaing device in the work period, processes after the described vehicle detecting information of reception to make described opertaing device to described vehicle detecting information; Wherein, described time synchronizing signal is that other transmission equipments neighbouring forward the time synchronizing signal received or the time synchronizing signal sent by described opertaing device.In the embodiment of the present invention, transmission equipment works within the work period, ensure that the normal work of transmission equipment, and saved the energy consumption of transmission equipment, and first carry out time synchronized when the work period starts, ensure that when vehicle detecting information transmission starts, send the accuracy of vehicle detecting information, solve repeater energy ezpenditure in prior art large, and between geomagnetism detecting device interior joint, transmit the problem of data accuracy difference.
Figure 1 shows that the schematic diagram of a kind of vehicle detecting system based on wireless geomagnetism detecting device that the embodiment of the present invention provides, comprising: transmission equipment 101, opertaing device 102.Particularly, transmission equipment 101 can be repeater or vehicle equipment; Opertaing device 102 can be receiver or primary controller.
Repeater is arranged in order to the scope expanding data transmission in wireless geomagnetism detection system, the vehicle detecting information received can be sent to receiver, also the steering order that receiver sends can be sent to vehicle equipment.
Vehicle equipment can have vehicle by time obtain the speed of vehicle, the vehicle detecting information such as vehicle shape, wagon flow are blocked up, and by repeater or be directly transferred to receiver.
Receiver to receive the vehicle detecting information that repeater or vehicle equipment send, and vehicle detecting information can be stored, process, and vehicle detecting information sent to transportation network or teleseme; And receiver can also receive the steering order of transportation network or teleseme, steering order sent to vehicle equipment or send to vehicle equipment by repeater, to make vehicle equipment receive steering order, detect according to the content in steering order.
Transmission equipment 101, for the time of reception synchronizing signal when the work period starts, carries out time synchronized according to described time synchronization information; In the work period, send vehicle detecting information to opertaing device 102, after the described vehicle detecting information of reception, described vehicle detecting information is processed to make described opertaing device 102; Wherein, described time synchronizing signal is that other transmission equipments neighbouring forward the time synchronizing signal received or the time synchronizing signal sent by described opertaing device.
Opertaing device 102, for periodic broadcasting time synchronizing signal, after the vehicle detecting information receiving the transmission of described transmission equipment, processes described vehicle detecting information.
In embodiments of the present invention, if transmission equipment 101 is repeater, then repeater 101 receives the vehicle detecting information that vehicle equipment sends, vehicle detecting information is sent to opertaing device 102, optionally, the steering order that repeater 101 receiving control apparatus 102 sends, and steering order is sent to vehicle equipment.
If transmission equipment 101 is repeater, then because the embodiment of the present invention detects for long distance vehicle stream information, multiple repeater 101 is needed to carry out prolongation Distance Transmission, so the opposite end that repeater 101 transmission information sends in embodiments of the present invention can be other repeaters, it also can be opertaing device 102.
Repeater 101 for receiving vehicle detecting information, and repeater 101 reception described vehicle detecting information after send described vehicle detecting information to other repeaters 101 or opertaing device 102;
Repeater 101 work period is when arriving, repeater 101 can obtain power supply, realize normal work, at the end of repeater 101 work period, repeater 101 no longer transmits and receive data signal, but is in dormant state, when dormant state, carry out countdown to work period next time, when the work period arrives, repeater 101 works on.
In embodiments of the present invention, if transmission equipment 101 is vehicle equipment, then vehicle equipment 101 is after vehicle detecting information being detected, vehicle detecting information is sent to repeater, or in the Traffic flow detecting in short-distance transmission path, vehicle detecting information is directly sent to opertaing device 102 by vehicle equipment 101.
In embodiments of the present invention, vehicle equipment 101 detects the intensity in magnetic field, when having vehicle through out-of-date, magnetic field intensity can change, the strength information in magnetic field is converted to the strength signal in magnetic field and carries out amplification process to signal by vehicle equipment 101, signal intensity according to amplifying process has judged whether that vehicle passes through, generate the vehicle comprising time data and cover information, the information that then covered by vehicle converts vehicle detecting information to and is sent to repeater or opertaing device 102 by vehicle equipment 101.
In embodiments of the present invention, opertaing device 102 is receiver, receiver 102 is for receiving the vehicle detecting information that sends from vehicle equipment 101 or repeater 101 and sending vehicle detecting information to teleseme or transportation network, also can the steering order that is sent to of Received signal strength machine or transportation network, steering order is sent to vehicle equipment 101 or repeater 101.
Optionally, when the both sides in the traffic section being in long distance laid by vehicle equipment and receiver 102, vehicle equipment is needed to need to carry out transmission vehicle detecting information by repeater 101, repeater 101 is after receiving vehicle detecting information, send to receiver 102, state on the invention in embodiment, transmission equipment 101 is repeater.
Optionally, when vehicle equipment 101 lays with receiver 102 both sides being in more short-range traffic section, the transmission of repeater is not needed between receiver 102 and vehicle equipment 101, transmission can be completed, then state on the invention in embodiment, transmission equipment 101 is middle vehicle equipment.
In embodiments of the present invention, transmission equipment 101 is when the work period starts, the time synchronizing signal that receiving control apparatus 102 or other transmission equipments 101 send, and carry out time synchronized according to time synchronizing signal, ensure that transmission equipment 101 is before transmission vehicle detecting information, synchronous with node retention times all in wireless geomagnetism vehicle detecting system, after time synchronized, send vehicle detecting information to opertaing device 102.
Opertaing device 102 is transmitting time synchronizing signal periodically, make transmission equipment 101 receive time synchronized letter after and opertaing device 102 carry out time synchronized, and within the work period of transmission equipment 101, receive the vehicle detecting information of transmission equipment 101 transmission, after receiving vehicle detecting information, vehicle detecting information is processed.
In embodiments of the present invention, vehicle detecting information can be vehicle density, car speed, the parameters such as vehicle dimension.
Wherein, work period of transmission equipment 101 refers to carries out work with Fixed Time Interval, can arrange according to section wagon flow situation, if wagon flow is more, then the time interval is less, if wagon flow is less, can set interval longer, ensure that the energy consumption of transmission equipment 101 reduces.
The time synchronizing signal that transmission equipment 101 receives comprises timestamp, and timestamp is a character string normally, identifies the time at certain a moment uniquely, is the application of a kind of mutation of digital signature technology.Timestamp (time-stamp) is a voucher document formed after encryption, and it comprises three parts: the summary (digest) of the file that need add timestamp; DTS (DigitalTimeStampService, Digital Time-stamp service) receives the date and time of file; The digital signature of DTS.
In embodiments of the present invention, the process that timestamp produces is: the time synchronizing signal Hash coding encrypting added timestamp by the needs that root node sends forms summary, then this summary is sent to DTS, the time synchronizing signal that with the addition of timestamp again to this file encryption (digital signature), is then sent to other nodes in wireless geomagnetism detection system by DTS after adding the date and time information of time of receipt (T of R) synchronizing signal.
In embodiments of the present invention, transmission equipment 101 is after receiving the time synchronizing signal containing timestamp, timestamp is converted to the time, optionally, if timestamp is sql like language, then according to SQL timestamp conversion formula, be converted to central time zone time GMT, and according to central time zone time GMT and the conversion relation of Beijing time, obtain Beijing time.
Described transmission equipment 101 converts duty when the work period starts to by dormant state, and time of reception synchronizing signal;
Described transmission equipment 101 sends after vehicle detecting information to opertaing device in the work period, at the end of the work period, convert dormant state to by duty, and stops Received signal strength and send signal.
In embodiments of the present invention, described transmission equipment 101 can need to arrange work period timer according to system, when work period timer in transmission equipment 101 calculates work period arrival, then wake the operational module that transmission equipment is all up, transmission equipment 101 can normally be worked.
At the end of the work period, work period timer in transmission equipment 101 is started working, calculate wakeup time next time, optionally, when work period timer operation, when namely transmission equipment 101 is in dormant state, the power supply in transmission equipment 101 is only powered to work period timer, and other module of transmission equipment 101 is no longer powered, make the energy consumption of transmission equipment 101 minimum.
In embodiments of the present invention, transmission equipment 101 is when the work period works, need to send vehicle detecting information to opertaing device 102, the stability and the reliability that keep vehicle detecting information signal is needed in transmitting procedure, opertaing device is made to receive reliable vehicle detecting information, so just according to the number of retransmissions of setting, send vehicle detecting information to described main control equipment 102.
Described transmission equipment 101 is after carrying out time synchronized, transmission equipment 101 is according to when time of reception synchronizing signal, the signal quality detection signal determination signal quality value that time synchronizing signal comprises, wherein signal quality detection signal comprises signal intensity RSSI (ReceivedSignalStrengthIndication, and signal quality LQI (LinkQualityIndicator RSSI), LQI), according to RSSI and LQI, determine signal quality value, and according to the corresponding relation of signal quality value and number of retransmissions, determine the number of retransmissions of transmission equipment 101 and opposite end, and retransmit according to number of retransmissions.
Optionally, in embodiments of the present invention, the relation of setting signal mass value and number of retransmissions can be: when RSSI is greater than-50dBm, and LQI is 255 simultaneously, and obtaining signal quality value is 0, and corresponding number of retransmissions is 0; When RSSI is greater than-60dBm, and be less than-50dBm, LQI is 255 simultaneously, and obtaining signal quality value is 1, and corresponding number of retransmissions is 1; When RSSI is greater than-70dBm, and be less than-60dBm, LQI is 255 simultaneously, can be set to re-transmission 2 times.
In embodiments of the present invention, to the number of retransmissions of transmission equipment 101, can the upper limit be set, to ensure that the time delay of transmission equipment 101 reduces, optionally, the number of retransmissions of transmission equipment 101 can be set to 2 times, when number of retransmissions is calculated as more than 2 times, then retransmit according to 2 times.
Optionally, in embodiments of the present invention, adopt hybrid automatic repeat-request (HybridAutomaticRepeatreQuest, HARQ) retransmit, major technique has following three kinds: receiving end use FEC (ForwardErrorCorrection, forward error correction) technology correct institute wrong in can correct that is a part of; The packet that can not correct a mistake is judged by error-detecting; Abandoning can not the packet of error correction, resends identical packet to transmitting terminal request.
Optionally, retransmission mechanism is that transmission equipment 101 end often sends a packet bag and just temporarily stops, and waits for the confirmation of opposite end.When packet arrives opposite end, carry out error detection to it, if receive correct, return confirmation (ACK) signal, mistake then returns and does not confirm (NACK) signal.When transmission equipment 101 receives ack signal, needs compare the value between number of times and the number of retransmissions of setting retransmitted when receiving ack signal, if do not arrive the value of the number of retransmissions of setting, just continue to send the packet transmitted last time, until meet number of retransmissions; Do not confirm (NACK) signal when transmission equipment 101 termination receives, then resend the packet of transmission last time, until after the number of retransmissions arranged, send packet to opposite end.And during wait acknowledge information, channel is idle, do not send any data.
In embodiments of the present invention, described opertaing device 102 can be primary controller in vehicle detecting system or receiver, in embodiments of the present invention, opertaing device 102 is receiver, and receiver 102 can receive the vehicle detecting information that transmission equipment sends, the steering order of configuration software or transportation network transmission also can be received.
The time synchronizing signal that can contain timestamp with Fixed Time Interval broadcast is also comprised in receiver 102, in embodiments of the present invention, with receiver 102 for root node, i.e. the standard of time synchronized.
Optionally, can broadcast with the time interval of 125ms, and delimit certain broadcasting area, transmission equipment 101 in broadcasting area carries out time synchronized according to time synchronizing signal, and transmission equipment 101 continues the broadcasting area according to setting, broadcast to other transmission equipment 101 in broadcasting area, adopt hierarchical structure to realize the time synchronized of all nodes in system.
In embodiments of the present invention, optionally, use FTSP (FloodingTimeSynchronizationProtocol, Flooding Time-Synchronization agreement) carry out time synchronized, FTSP agreement adopts hierarchical structure, and root node is synchronisation source, and namely receiver is synchronisation source, can adapt to a large amount of sensor node, degree of accuracy is better.
As shown in Figure 2, S is synchronisation source and root node receiver 102, R1, R2, R3 is the receiving end in broadcasting area, can be repeater 101 in embodiments of the present invention, in wireless geomagnetism vehicle detecting system, each node comprises a local clock and a global clock, clock skew (offset) and the clock skew (skew) of local clock and global clock all adopt linear regression algorithm to estimate, by linear regression analysis, to clock drift, ((clockdrifts) compensates FTSP algorithm.
Optionally, multiple repeater 101 is comprised for wireless geomagnetism detection system, need to carry out synchronously to nodes all in wireless geomagnetism detection system, FTSP adopts hierarchical structure, root node and receiver 102 are defined as 0 grade, the root node broadcast domain node definition be in the circular scope shown in Fig. 4 is 1 grade of node, by that analogy, the synchronisation of nodes of rank k is the node of (k-1) to rank, all node periodic broadcast time synchronized messages, when k level node receive (k-1) level node sync message and synchronous after, generate new sync message and broadcast away.
Opertaing device 102 is after the vehicle detecting information receiving the transmission of described transmission equipment 101, described vehicle detecting information is processed, optionally, can store vehicle detecting information, and vehicle detecting information is calculated, calculate in setting-up time, the vehicle flowrate in this section, and information of vehicle flowrate is sent to the network control center.
Optionally, in embodiments of the present invention, receiver 102 can, when receiving steering order to transmission equipment 101 sending controling instruction, need before sending controling instruction to carry out time synchronized to the node in whole wireless geomagnetism detection system.
Based on identical technical conceive, the embodiment of the present invention also provides a kind of vehicle detection apparatus based on wireless geomagnetism detecting device, as shown in Figure 3, comprising:
Lock unit 201, for the time of reception synchronizing signal when the work period starts, carries out time synchronized according to described time synchronization information;
Transmitting element 202, for sending vehicle detecting information to opertaing device in the work period, processes described vehicle detecting information after the described vehicle detecting information of reception to make described opertaing device;
Wherein, described time synchronizing signal is that other transmission equipments neighbouring forward the time synchronizing signal received or the time synchronizing signal sent by described opertaing device.
Further, described lock unit 201, also for converting duty when the work period starts to by dormant state, and time of reception synchronizing signal;
Send after vehicle detecting information to opertaing device in the work period, also for:
At the end of the work period, convert dormant state to by duty, and stop Received signal strength and send signal.
Further, described transmitting element 202, also for:
According to the number of retransmissions of setting, send vehicle detecting information to described main control equipment.
Further, described transmitting element 202, also for:
According to the time synchronizing signal received, determine signal quality value, and according to the corresponding relation of signal quality value and signal number of retransmissions, determine the number of retransmissions that described signal quality is corresponding;
The number of retransmissions of setting themselves is upgraded with the number of retransmissions determined.
Further, described device is vehicle equipment or repeater.
Further, described device is vehicle equipment; Described lock unit 201, for:
Detected vehicle by time obtain vehicle detecting information, and vehicle detecting information directly sent to described opertaing device or send to described opertaing device by repeater;
Described device is repeater; Described biography lock unit 201, for:
By the vehicle detecting information obtained from vehicle equipment or other repeaters, directly send to described opertaing device or send to described opertaing device by repeater.
The embodiment of the present invention also provides a kind of vehicle detection apparatus based on wireless geomagnetism detecting device, as shown in Figure 4, comprising:
Radio unit 301, for periodic broadcasting time synchronizing signal, carries out time synchronized when the work period starts according to the time synchronization information received to make transmission equipment;
Processing unit 302, for after the vehicle detecting information receiving the transmission of described transmission equipment, processes described vehicle detecting information.
A kind of vehicle checking method based on wireless geomagnetism detecting device is provided in the embodiment of the present invention, from transmission equipment, as shown in Figure 5, can comprises:
Step 401, transmission equipment be time of reception synchronizing signal when the work period starts, and carries out time synchronized according to described time synchronization information;
Step 402, described transmission equipment send vehicle detecting information to opertaing device in the work period, process after the described vehicle detecting information of reception to make described opertaing device to described vehicle detecting information;
Wherein, described time synchronizing signal is that other transmission equipments neighbouring forward the time synchronizing signal received or the time synchronizing signal sent by described opertaing device.
Described transmission equipment is time of reception synchronizing signal when the work period starts, and comprising:
Described transmission equipment converts duty when the work period starts to by dormant state, and time of reception synchronizing signal;
Described transmission equipment converts dormant state to by duty at the end of the work period, and stops Received signal strength and send signal.
Described transmission equipment sends vehicle detecting information to opertaing device in the work period, also comprises:
Described transmission equipment, according to the number of retransmissions of setting, sends vehicle detecting information to described main control equipment.
Described transmission equipment, after carrying out time synchronized, also comprises:
Described transmission equipment, according to the time synchronizing signal received, determines signal quality value, and according to the corresponding relation of signal quality value and signal number of retransmissions, determines the number of retransmissions that described signal quality is corresponding;
The described transmission equipment number of retransmissions determined upgrades the number of retransmissions of setting themselves.
Described transmission equipment is vehicle equipment or repeater.
Described transmission equipment is vehicle equipment; Described transmission equipment sends vehicle detecting information to opertaing device in the work period, comprising:
Described transmission equipment detected vehicle by time obtain vehicle detecting information, and vehicle detecting information directly sent to described opertaing device or send to described opertaing device by repeater;
Described transmission equipment is repeater; Described transmission equipment sends vehicle detecting information to opertaing device in the work period, comprising:
The vehicle detecting information that described transmission equipment will obtain from vehicle equipment or other repeaters, directly sends to described opertaing device or sends to described opertaing device by repeater.
Accordingly, from opertaing device side, the vehicle checking method based on wireless geomagnetism detecting device provided in the embodiment of the present application can as shown in Figure 6, comprise:
Step 501, opertaing device periodic broadcasting time synchronizing signal, carry out time synchronized when the work period starts according to the time synchronization information received to make transmission equipment;
Step 502, described opertaing device, after the vehicle detecting information receiving the transmission of described transmission equipment, process described vehicle detecting information.
In order to more clearly understand the application, with instantiation, said system is described in detail below.
Embodiment one
In the embodiment of the present invention one, described wireless geomagnetism vehicle detecting system comprises vehicle equipment, multiple repeater, and receiver, due to the embodiment of the present invention for vehicle detection is carried out in long distance section, so in the present system, need by repeater, transmission range to be extended, the vehicle detecting information that then vehicle equipment collects passes to repeater, receiver is passed to by repeater, and only have repeater to receive time synchronizing signal in the broadcasting area of receiver, in the broadcasting area of repeater, vehicle equipment can receive time synchronizing signal, as shown in Figure 7, be specially:
Step 601, when the work period arrives, receiver is to the repeater transmitting time synchronizing signal in broadcasting area;
Step 602, repeater, after receiving time synchronizing signal, carries out time synchronized, makes repeater carry out synchronous with receiver;
Step 603, repeater is to the vehicle equipment transmitting time synchronizing signal in broadcasting area;
Step 604, vehicle equipment after receiving time synchronizing signal, carries out time synchronized at repeater, makes vehicle equipment carry out synchronous with repeater, makes all nodes in wireless geomagnetism vehicle detecting system carry out synchronously;
Step 605, vehicle equipment have vehicle by time, collection vehicle Detection Information, and send to repeater after collecting vehicle detecting information;
Step 606, repeater, when carrying out data transmission to receiver, needs to carry out signal quality detection, according to the signal quality detection signal determination signal quality value that time synchronizing signal in step 602 comprises, and according to the corresponding relation of signal quality value and number of retransmissions, determine number of retransmissions;
Step 607, repeater transmits according to the number of retransmissions determined, sends vehicle detecting information to receiver;
Step 608, receiver, after the vehicle detecting information receiving repeater transmission, processes vehicle detecting information and preserves.
Embodiment two
In the embodiment of the present invention two, transmission equipment is vehicle equipment, and vehicle equipment, after collecting vehicle detecting information, sends to receiver, to make receiver at the laggard row relax of acquisition vehicle detecting information, as shown in Figure 8, is specially:
Step 701, when the work period arrives, receiver is to the repeater transmitting time synchronizing signal in broadcasting area;
Step 702, vehicle equipment, after receiving time synchronizing signal, carries out time synchronized, makes vehicle equipment carry out synchronous with receiver;
Step 703, vehicle equipment have vehicle by time, collection vehicle Detection Information;
Step 704, vehicle equipment is when carrying out data transmission to receiver, need to carry out signal quality detection, according to the signal quality detection signal determination signal quality value that time synchronizing signal in a step 702 comprises, and according to the corresponding relation of signal quality value and number of retransmissions, determine number of retransmissions;
Step 705, vehicle equipment transmits according to the number of retransmissions determined, sends vehicle detecting information to receiver;
Step 706, receiver, after the vehicle detecting information receiving vehicle equipment transmission, processes vehicle detecting information and preserves.
The present invention describes with reference to according to the process flow diagram of the method for the embodiment of the present invention, equipment (system) and computer program and/or block scheme.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block scheme and/or square frame and process flow diagram and/or block scheme and/or square frame.These computer program instructions can being provided to the processor of multi-purpose computer, special purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computing machine or other programmable data processing device produce device for realizing the function of specifying in process flow diagram flow process or multiple flow process and/or block scheme square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in process flow diagram flow process or multiple flow process and/or block scheme square frame or multiple square frame.
These computer program instructions also can be loaded in computing machine or other programmable data processing device, make on computing machine or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computing machine or other programmable devices is provided for the step realizing the function of specifying in process flow diagram flow process or multiple flow process and/or block scheme square frame or multiple square frame.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (14)
1. based on a vehicle checking method for wireless geomagnetism detecting device, it is characterized in that, described method comprises:
Transmission equipment is time of reception synchronizing signal when the work period starts, and carries out time synchronized according to described time synchronization information;
Described transmission equipment sends vehicle detecting information to opertaing device in the work period, processes after the described vehicle detecting information of reception to make described opertaing device to described vehicle detecting information;
Wherein, described time synchronizing signal is that other transmission equipments neighbouring forward the time synchronizing signal received or the time synchronizing signal sent by described opertaing device.
2. method according to claim 1, is characterized in that, described transmission equipment is time of reception synchronizing signal when the work period starts, and comprising:
Described transmission equipment converts duty when the work period starts to by dormant state, and time of reception synchronizing signal;
Described transmission equipment sends after vehicle detecting information to opertaing device in the work period, also comprises:
Described transmission equipment converts dormant state to by duty at the end of the work period, and stops Received signal strength and send signal.
3. method according to claim 1, is characterized in that, described transmission equipment sends vehicle detecting information to opertaing device in the work period, also comprises:
Described transmission equipment, according to the number of retransmissions of setting, sends vehicle detecting information to described main control equipment.
4. method according to claim 3, is characterized in that, described transmission equipment, after carrying out time synchronized, also comprises:
Described transmission equipment, according to the time synchronizing signal received, determines signal quality value, and according to the corresponding relation of signal quality value and signal number of retransmissions, determines the number of retransmissions that described signal quality is corresponding;
The described transmission equipment number of retransmissions determined upgrades the number of retransmissions of setting themselves.
5., according to the arbitrary described method of Claims 1 to 4, it is characterized in that, described transmission equipment is vehicle equipment or repeater.
6. method according to claim 5, is characterized in that, described transmission equipment is vehicle equipment; Described transmission equipment sends vehicle detecting information to opertaing device in the work period, comprising:
Described transmission equipment detected vehicle by time obtain vehicle detecting information, and vehicle detecting information directly sent to described opertaing device or send to described opertaing device by repeater;
Described transmission equipment is repeater; Described transmission equipment sends vehicle detecting information to opertaing device in the work period, comprising:
The vehicle detecting information that described transmission equipment will obtain from vehicle equipment or other repeaters, directly sends to described opertaing device or sends to described opertaing device by repeater.
7. based on a vehicle checking method for wireless geomagnetism detecting device, it is characterized in that, described method comprises:
Opertaing device periodic broadcasting time synchronizing signal, carries out time synchronized when the work period starts according to the time synchronization information received to make transmission equipment;
Described opertaing device, after the vehicle detecting information receiving the transmission of described transmission equipment, processes described vehicle detecting information.
8. based on a vehicle detection apparatus for wireless geomagnetism detecting device, it is characterized in that, comprising:
Lock unit, for the time of reception synchronizing signal when the work period starts, carries out time synchronized according to described time synchronization information;
Transmitting element, for sending vehicle detecting information to opertaing device in the work period, processes described vehicle detecting information after the described vehicle detecting information of reception to make described opertaing device;
Wherein, described time synchronizing signal is that other transmission equipments neighbouring forward the time synchronizing signal received or the time synchronizing signal sent by described opertaing device.
9. device according to claim 8, is characterized in that, described lock unit, also for:
Duty is converted to by dormant state when the work period starts, and time of reception synchronizing signal;
At the end of the work period, convert dormant state to by duty, and stop Received signal strength and send signal.
10. device according to claim 8, is characterized in that, described transmitting element, also for:
According to the number of retransmissions of setting, send vehicle detecting information to described main control equipment.
11. devices according to claim 10, is characterized in that, described transmitting element, also for:
According to the time synchronizing signal received, determine signal quality value, and according to the corresponding relation of signal quality value and signal number of retransmissions, determine the number of retransmissions that described signal quality is corresponding;
The number of retransmissions of setting themselves is upgraded with the number of retransmissions determined.
12. according to Claim 8 ~ 10 arbitrary described devices, it is characterized in that, described device is vehicle equipment or repeater.
13. devices according to claim 12, is characterized in that, described device is vehicle equipment; Described lock unit, for:
Detected vehicle by time obtain vehicle detecting information, and vehicle detecting information directly sent to described opertaing device or send to described opertaing device by repeater;
Described device is repeater; Described biography lock unit, for:
By the vehicle detecting information obtained from vehicle equipment or other repeaters, directly send to described opertaing device or send to described opertaing device by repeater.
14. 1 kinds based on the vehicle detection apparatus of wireless geomagnetism detecting device, is characterized in that, comprising:
Radio unit, for periodic broadcasting time synchronizing signal, carries out time synchronized when the work period starts according to the time synchronization information received to make transmission equipment;
Processing unit, for after the vehicle detecting information receiving the transmission of described transmission equipment, processes described vehicle detecting information.
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| CN201510980777.3A CN105551262A (en) | 2015-12-23 | 2015-12-23 | Vehicle detection method based on wireless geomagnetic detector and apparatus thereof |
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| CN201510980777.3A CN105551262A (en) | 2015-12-23 | 2015-12-23 | Vehicle detection method based on wireless geomagnetic detector and apparatus thereof |
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