CN103913619A - Current monitoring system and method based on wireless sensor network - Google Patents
Current monitoring system and method based on wireless sensor network Download PDFInfo
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- CN103913619A CN103913619A CN201210592898.7A CN201210592898A CN103913619A CN 103913619 A CN103913619 A CN 103913619A CN 201210592898 A CN201210592898 A CN 201210592898A CN 103913619 A CN103913619 A CN 103913619A
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Abstract
The invention provides a current monitoring system and method based on a wireless sensor network. The system comprises a host computer, an RS232 communications link, a network aggregation node, a Zigbee communication link and sensor nodes, and is characterized in that the sensor nodes collect current information; the sensor nodes are centered on the aggregation node to form a star topology network; the sensor nodes and the aggregation node are in communication connection via a Zigbee wireless transmission module; and the aggregation node and the host computer are in communication connection via an RS232 interface. By use of the technical scheme in the invention, current signals can be easily and flexibly monitored, the heavy cable work is effectively avoided, cordless communication is achieved, the cost of and difficulty in system layout are reduced and the project cycle is sped up.
Description
Technical field
The present invention relates to current monitoring technology, especially the current monitoring technology based on wireless sensor network.
Background technology
In Industry Control, often need to monitor the current parameters in a certain path, and with the basis for estimation of this shape paired fault.1, traditional approach need to insert galvanometer on the conductors such as electric wire, and electric current is sampled, and has suitable limitation.2, the data that sampling obtains are often delivered to data processing centre (DPC) by line transmission system, because line transmission system need to be implemented a large amount of wirings, have brought inconvenience to the system integration.
Wireless sensor network is a kind of network by forming with the sensor node of wireless data transceiving device.The various information of dynamically monitoring, perception, acquisition target is also processed these information, sends to remote terminal by wireless network.Wireless sensor network has broad application prospects in every field, has: low-power consumption, low cost, closely, prolong in short-term, high power capacity, high peace property, be operated in the plurality of advantages such as unlicensed band.
Summary of the invention
In order better to solve above two problems, need to use the current detecting system based on wireless sensor network.Object of the present invention is just being to provide a kind of system and method for the current monitoring based on wireless sensor network.
According to an embodiment of the invention, a kind of system of the current monitoring based on wireless sensor network is disclosed, described system comprises: host computer, RS232 communication link, network collects node, Zigbee communication link and sensor node.It is characterized in that: sensor node gathers current information, each sensor node forms star topology network centered by collecting node, sensor node and collecting between node communicates to connect by Zigbee wireless transport module, collects between node and host computer and uses RS232 interface communication to connect.
Described sensor node comprises the flush bonding processor unit of current signal collecting unit, analogy signal processing unit, photoelectricity isolated location, integrated wireless transmission-receiving function.It is characterized in that: current signal collecting unit Gather and input current signal information; Analogy signal processing unit carries out filtering clutter operation to signal; Photoelectricity isolated location is further isolated interference; The flush bonding processor unit of integrated wireless transmission-receiving function is sent to the data that collect to collect node.
Described network collects flush bonding processor and the RS232 communication interface that node comprises integrated wireless transmission-receiving function.It is characterized in that: the flush bonding processor of integrated wireless transmission-receiving function arranges the data that obtain, be uploaded to host computer by RS232 interface.
Described host computer comprises with the PC of RS232 interface and host computer interface program.It is characterized in that: RS232 interface received communication data, PC is presented in host computer interface after processing, and this host computer interface program is not in context of the present invention, this superfluous stating no longer.
Wherein current signal collecting unit is selected current transformer, and photoelectricity isolated location is selected controllable photoelectric coupled device TLP521-1, and CC2430/2431 chip is selected in flush bonding processor unit 504.
Embodiment according to another preferred, a kind of method of the current monitoring based on wireless sensor network is also disclosed, described method is by the System Implementation of the above-mentioned current monitoring based on wireless sensor network, and as mentioned above, described method comprises the steps: described system composition
Embedded system initialization, arranges correlation parameter.
System judges whether self node is that network collects node, as regard as true, transfering from one department to another system is written into network and collects node correlation parameter, RS232 communication module and wireless communication module step are set, be written into sensor node correlation parameter otherwise transfer from one department to another system, current data acquisition module and wireless communication module step are set.
System is written into network and collects node correlation parameter, and RS232 communication module and wireless communication module are set.
Whether system queries has host computer instruction to arrive, if regarded as very, turns by wireless communication module this instruction is sent to sensor node step, carries out wait operation steps otherwise transfer from one department to another system.
Whether system is carried out and is waited for operation, if overtime, system enters holding state, have host computer instruction to arrive step otherwise turn system queries.
If system receives host computer instruction, by wireless communication module, this instruction is sent to sensor node.
System wait data are returned, if obtain the data that requirement is returned, transfer from one department to another system the data of returning are rearranged, and are uploaded to host computer step by RS232 communication unit, carry out wait operation steps otherwise transfer from one department to another system.
System is carried out and is waited for operation, if overtime, system enters holding state, returns to step otherwise turn system wait data.
System rearranges the data of returning, and is uploaded to host computer by RS232 communication unit.
System is written into sensor node correlation parameter, and current data acquisition module and wireless communication module are set.
Whether system queries has radio frequency command to arrive, if regarded as very, transfers from one department to another system and carries out the sampling work to current data, obtains related data step, again waits for operation steps otherwise transfer from one department to another system execution.
Whether system is carried out and is again waited for operation, if overtime, system enters holding state, have radio frequency command to arrive step otherwise turn system queries.
System is carried out the sampling work to current data, obtains related data.
System is collected node by the related data collecting by Zigbee communication links to network, after completing, enters dormant state.
Wherein, in the time that network collects node in dormant state, can be waken up by host computer instruction and radio frequency command, when sensor node is during in dormant state, can be waken up by radio frequency command.
Owing to adopting technique scheme, advantage and good effect that the present invention has are: monitoring current signal easily and flexibly, effectively avoid heavy winding displacement work, and realize wirelessization of communication, reduce cost and the difficulty of system layout, accelerated construction period.
Accompanying drawing explanation
The structured flowchart of the current monitoring system based on wireless sensor network that Fig. 1 provides for the embodiment of the present invention;
The network that Fig. 2 provides for the embodiment of the present invention collects node hardware elementary diagram;
The sensor node hardware elementary diagram that Fig. 3 provides for the embodiment of the present invention;
Fig. 4 collects node software control flow chart for sensor node and network that the embodiment of the present invention provides.
Embodiment
As shown in Figure 1, the current monitoring system of wireless sensor network comprises: host computer 1, and RS232 communication link 2, network collects node 3, Zigbee communication link 4, sensor node 5.
Described host computer 1 is made up of PC and the host computer interface program of integrated RS232 communication interface, and this program is not in the context of this patent.
Described network collects node 2 hardware configuration principles as shown in Figure 2, is made up of flush bonding processor unit 302 of RS232 communications interface unit 301 and integrated wireless transmission-receiving function etc.RS232 communications interface unit 301 is responsible for implementing communicating by letter between host computer, and the transmission that network collects instruction and data between node 3 and each sensor node 5 is implemented in the flush bonding processor unit 302 of integrated wireless transmission-receiving function.
Described sensor node 5 hardware configuration principles as shown in Figure 3, by current signal collecting unit 501, analogy signal processing unit 502, photoelectricity isolated location 503, flush bonding processor unit 504 compositions such as grade of integrated wireless transmission-receiving function.
U1 is current signal collecting unit 501.Select current transformer, this device can be according to the current signal output respective waveforms of sampling, when in electric wire, change by alternating polarity current signal time, the signal of output is to have certain Wave crest and wave trough, the signal that changes alternately.
D2, D4, C3, R3 form analogy signal processing unit 502.Because the waveform of current transformer output is subject to sample rate current effect of signals larger, so must carry out relevant treatment to protect back-end circuit unaffected to it.Wherein D2, D4 composition clamping circuit, within being controlled at certain scope by sample voltage value.D2 cathode terminal access stabilized voltage supply, can guarantee D2 anode tap stable operating voltage (reference diode forward conduction magnitude of voltage takes the circumstances into consideration to revise cathode terminal access stabilized voltage supply value) below stabilivolt breakdown reverse voltage VZ.D4 anode tap ground connection, negative electrode termination sampled signal line, can prevent the appearance of reverse voltage.In application, need to be according to current transformer Real output waveform, determine the voltage stabilizing value of diode, in conjunction with the suitable diode of other parameters selections.C3, R3 form low-pass filter, further filtering clutter.
U2 is photoelectricity isolated location 503.For further protecting flush bonding processor; increase photoelectric isolating device; TLP521-1 is selected in recommendation; TLP521-1 is controllable photoelectric coupled device; realize front end and load is isolated completely; make the signal of prime can not have influence on the embedded system of rear class, increased safety and reliability.In the time that external pulse arrives, photo-coupler input end AN and CA conducting, the inner light signal conducting output terminal that produces,
Cause output terminal C and E conducting, R7 and processor pin link voltage fall, and produce and have certain frequency and the smooth pulse signal of waveform.Flush bonding processor can, by the modes such as interruption this pin voltage of sampling, be made corresponding judgement.
The flush bonding processor unit 504 of integrated wireless transmission-receiving function.Formed by U4 and related peripheral device.Wherein U4 recommends that to select CC2430/2431, this chip be the flush bonding processor of having integrated 2.4GHz radio frequency transceiver CC2420 and enhancement mode 8051 kernels, and only needs little external device just can fast and effeciently build radio sensing network.Flush bonding processor collects by network the instruction triggers data acquisition program that node is sent according to host computer, by the pin level value of continuous sampling flush bonding processor and photoelectricity isolated location connection, can judge the current signal being sampled whether exist with and frequency values.Obtain after related data, flush bonding processor uses self integrated wireless senser radio frequency transceiver, by Zigbee communication link 4, these data are reached to network and collect node 3, network collect node 3 by this data upload to host computer 1.
Fig. 4 is that sensor node 5 of the present invention and network collect node 3 software control flow charts, and the method comprises:
Step 401: embedded system initialization, correlation parameter is set, described correlation parameter is embedded system Common Parameters of the prior art, is not described in detail at this.
Step 402: system judges whether self node is that network collects node, as regard as very, go to step 403, otherwise go to step 410.
Step 403: system is written into network and collects node correlation parameter, and RS232 communication module and wireless communication module are set.
Step 404: whether system queries has host computer instruction to arrive, if regarded as very, goes to step 406, otherwise goes to step 405.
Step 405: system is carried out and waited for operation, if overtime, system enters holding state, otherwise goes to step 404.
Step 406: if system receives host computer instruction, by wireless communication module, this instruction is sent to sensor node.
Step 407: system wait data are returned, if obtain the data that requirement is returned, goes to step 409, otherwise goes to step 408.
Step 408: system is carried out and waited for operation, if overtime, system enters holding state, otherwise goes to step 407.
Step 409: system rearranges the data of returning, and is uploaded to host computer by RS232 communication unit.
Step 410: system is written into sensor node correlation parameter, arranges current data acquisition module and wireless communication module.
Step 411: whether system queries has radio frequency command to arrive, if regarded as very, goes to step 413, otherwise goes to step 412.
Step 412: system is carried out and waited for operation, if overtime, system enters holding state, otherwise goes to step 411.
Step 413: system is carried out the sampling work to current data, obtains related data.
Step 414: the data that system collects step 413 are collected node by Zigbee communication links to network, enters dormant state after completing.
Network collects node in the time of dormant state, can be waken up by host computer instruction and radio frequency command; Sensor node, in the time of dormant state, can be waken up by radio frequency command.
Above embodiment is only for illustrating the present invention; and be not limitation of the present invention; the those of ordinary skill in relevant technologies field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all technical schemes that are equal to also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (10)
1. the current monitoring system based on wireless sensor network, it is characterized in that: described system comprises host computer, RS232 communication link, network collects node, Zigbee communication link and sensor node, described sensor node gathers current information, each sensor node forms star topology network centered by network collects node, described sensor node and described network collect between node and communicate to connect by Zigbee wireless transport module, and described network collects between node and host computer and uses RS232 interface communication to connect.
2. a kind of current monitoring system based on wireless sensor network as claimed in claim 1, it is characterized in that, wherein said sensor node comprises the flush bonding processor unit of current signal collecting unit, analogy signal processing unit, photoelectricity isolated location, integrated wireless transmission-receiving function.
3. a kind of current monitoring system based on wireless sensor network as claimed in claim 2, is characterized in that, wherein current signal collecting unit Gather and input current signal information; Analogy signal processing unit carries out filtering clutter operation to signal; Photoelectricity isolated location is further isolated interference; The flush bonding processor unit of integrated wireless transmission-receiving function is sent to network by the data that collect and collects node.
4. a kind of current monitoring system based on wireless sensor network as claimed in claim 1, it is characterized in that, wherein said network collects flush bonding processor and the RS232 communication interface that node comprises integrated wireless transmission-receiving function, the flush bonding processor of described integrated wireless transmission-receiving function arranges the data that obtain, and is uploaded to host computer by RS232 interface.
5. a kind of current monitoring system based on wireless sensor network as claimed in claim 1, it is characterized in that, described host computer comprises with the PC of RS232 interface and host computer interface program, described RS232 interface received communication data, and PC is presented in host computer interface after processing.
6. a kind of current monitoring system based on wireless sensor network as claimed in claim 2 or claim 3, is characterized in that, wherein current signal collecting unit is selected current transformer, and photoelectricity isolated location is selected controllable photoelectric coupled device TLP521-1.
7. a kind of current monitoring system based on wireless sensor network as claimed in claim 2 or claim 3, is characterized in that, wherein CC2430/2431 chip is selected in flush bonding processor unit 504.
8. the current monitoring method based on wireless sensor network, described method is implemented by any one current monitoring system based on wireless sensor network in claim 1-7, it is characterized in that described method comprises the steps:
Embedded system initialization, arranges correlation parameter.
System judges whether self node is that network collects node, as regard as true, transfering from one department to another system is written into network and collects node correlation parameter, RS232 communication module and wireless communication module step are set, be written into sensor node correlation parameter otherwise transfer from one department to another system, current data acquisition module and wireless communication module step are set.
System is written into network and collects node correlation parameter, and RS232 communication module and wireless communication module are set.
Whether system queries has host computer instruction to arrive, if regarded as very, turns by wireless communication module this instruction is sent to sensor node step, carries out wait operation steps otherwise transfer from one department to another system.
Whether system is carried out and is waited for operation, if overtime, system enters holding state, have host computer instruction to arrive step otherwise turn system queries.
If system receives host computer instruction, by wireless communication module, this instruction is sent to sensor node.
System wait data are returned, if obtain the data that requirement is returned, transfer from one department to another system the data of returning are rearranged, and are uploaded to host computer step by RS232 communication unit, carry out wait operation steps otherwise transfer from one department to another system.
System is carried out and is waited for operation, if overtime, system enters holding state, returns to step otherwise turn system wait data.
System rearranges the data of returning, and is uploaded to host computer by RS232 communication unit.
System is written into sensor node correlation parameter, and current data acquisition module and wireless communication module are set.
Whether system queries has radio frequency command to arrive, if regarded as very, transfers from one department to another system and carries out the sampling work to current data, obtains related data step, again waits for operation steps otherwise transfer from one department to another system execution.
Whether system is carried out and is again waited for operation, if overtime, system enters holding state, have radio frequency command to arrive step otherwise turn system queries.
System is carried out the sampling work to current data, obtains related data.
System is collected node by the related data collecting by Zigbee communication links to network, after completing, enters dormant state.
9. a kind of current monitoring method based on wireless sensor network as claimed in claim 8, is characterized in that, wherein, in the time that network collects node in dormant state, can be waken up by host computer instruction and radio frequency command.
10. a kind of current monitoring method based on wireless sensor network as claimed in claim 8, is characterized in that, wherein, when sensor node is during in dormant state, can be waken up by radio frequency command.
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| CN109752628A (en) * | 2019-01-15 | 2019-05-14 | 国网辽宁省电力有限公司鞍山供电公司 | A kind of multifunctional mutual-inductor polarity test instrument based on embedded RTU |
| CN111398717A (en) * | 2020-04-07 | 2020-07-10 | 中山市鑫轩电子科技有限公司 | Early warning sensor for electric power operation monitoring |
| CN112511188A (en) * | 2020-12-03 | 2021-03-16 | 杭州得诚电力科技股份有限公司 | Anti-interference data acquisition method and device, electronic equipment and storage medium |
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| CN103913619B (en) | 2016-05-18 |
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