CN110007637B - ZigBee-based intelligent bus temperature and humidity monitoring controller - Google Patents

ZigBee-based intelligent bus temperature and humidity monitoring controller Download PDF

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CN110007637B
CN110007637B CN201910399841.7A CN201910399841A CN110007637B CN 110007637 B CN110007637 B CN 110007637B CN 201910399841 A CN201910399841 A CN 201910399841A CN 110007637 B CN110007637 B CN 110007637B
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temperature
humidity
cluster head
nodes
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CN110007637A (en
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孙延锋
朱恩龙
柏军
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Guangdong Xinnanda Cable Industry Co ltd
Wu Long
Xie Feng
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
    • G05B19/0428—Safety, monitoring
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/20—Pc systems
    • G05B2219/24—Pc safety
    • G05B2219/24215—Scada supervisory control and data acquisition

Abstract

Intelligent bus humiture monitoring controller based on zigBee, including monitoring controller, repeater and remote monitoring terminal, monitoring controller is used for gathering the temperature and the humidity data of generating line in real time to the temperature and the humidity data that will gather and obtain transmit to the repeater through zigBee wireless communication technology, forward to remote monitoring terminal by the repeater, remote monitoring terminal is used for showing received temperature and humidity data in real time to report to the police when temperature or humidity data surpass the safety threshold promptly. The invention has the beneficial effects that: the intelligent bus temperature and humidity monitoring controller based on the ZigBee is used for monitoring the bus temperature/humidity based on the ZigBee wireless communication technology, can effectively solve the problems that a wired network needs additional wiring, the structure is complex, the existing network communication is not smooth and the like, and achieves the real-time monitoring function of the intelligent bus temperature/humidity with low power consumption, low price and high reliability.

Description

ZigBee-based intelligent bus temperature and humidity monitoring controller
Technical Field
The invention relates to the field of bus safety monitoring, in particular to an intelligent bus temperature and humidity monitoring controller based on ZigBee.
Background
In recent years, power systems have been developed rapidly, the voltage level and capacity have been increased with the progress of modernization, and the conventional cable as a power transmission conductor has not been able to meet the requirements in a large current transmission system. The intelligent bus is produced as a novel electric lead and has very great advantages when large current is transmitted, but because the bus duct structure is compact, the copper bars are pressed together tightly, and the requirement on heat dissipation and insulating property is high. If the temperature is too high, the aging of the insulation of the outer layer of the bus can be accelerated, and even a fire can be caused. If the humidity is too high or the bus bar is in a humid environment for a long time, the insulation of the bus bar may be reduced, and potential safety hazards are caused. Therefore, the temperature and the humidity of the bus can be monitored in real time, and the method has important significance for safe operation of the bus and electrical equipment.
Disclosure of Invention
Aiming at the problems, the invention aims to provide an intelligent bus temperature and humidity monitoring controller based on ZigBee.
The purpose of the invention is realized by the following technical scheme:
an intelligent bus temperature and humidity monitoring controller based on ZigBee comprises a monitoring controller, a repeater and a remote monitoring terminal, the monitoring controller comprises a temperature and humidity monitoring module, a microprocessor module and a ZigBee module, the temperature and humidity monitoring module is used for acquiring temperature and humidity signals at the bus joint in real time and sending the acquired signals to the microprocessor module for analysis and processing, the microprocessor module feeds back the processed temperature and humidity data to the ZigBee module, the ZigBee module transmits the processed temperature and humidity data to the repeater by adopting a ZigBee wireless communication technology, the data are transmitted to the remote monitoring terminal by the repeater, the remote monitoring terminal comprises a data display unit and a danger alarm unit, the data display unit is used for displaying the received temperature and humidity data in real time, the danger alarm unit is used for alarming when the temperature or humidity data exceeds a safety threshold value.
The beneficial effects created by the invention are as follows: the intelligent bus temperature and humidity monitoring controller based on the ZigBee is used for monitoring the bus temperature and humidity based on the ZigBee wireless communication technology, can effectively solve the problems that a wired network needs additional wiring, the structure is complex, the existing network communication is not smooth and the like, and achieves the real-time monitoring function of intelligent bus temperature/humidity with low power consumption, low price and high reliability.
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The invention is further described with the aid of the accompanying drawings, in which, however, the embodiments do not constitute any limitation to the invention, and for a person skilled in the art, without inventive effort, further drawings may be derived from the following figures.
FIG. 1 is a schematic structural view of the present invention;
reference numerals:
a monitoring controller 1; a repeater 2; a remote monitoring terminal 3; a temperature and humidity monitoring module 11; a microprocessor module 12; a ZigBee module 13; a data display unit 31; a hazard warning unit 32.
Detailed Description
The invention is further described with reference to the following examples.
Referring to fig. 1, the intelligent bus temperature and humidity monitoring controller based on ZigBee of this embodiment includes a monitoring controller 1, a relay 2, and a remote monitoring terminal 3, where the monitoring controller 1 includes a temperature and humidity monitoring module 11, a microprocessor module 12, and a ZigBee module 13, the temperature and humidity monitoring module 11 is configured to collect temperature and humidity signals at a bus joint in real time and send the collected signals to the microprocessor module 12 for analysis and processing, the microprocessor module 12 feeds back the processed temperature and humidity data to the ZigBee module 13, the ZigBee module 13 transmits the processed temperature and humidity data to the relay 2 by using a ZigBee wireless communication technology, and forwards the processed temperature and humidity data to the remote monitoring terminal 3 through the relay 2, the remote monitoring terminal 3 includes a data display unit 31 and a hazard alarm unit 32, and the data display unit 31 is configured to display the received temperature and humidity data in real time, the hazard warning unit 32 is configured to warn when the temperature or humidity data exceeds a safety threshold.
Preferably, the temperature and humidity monitoring module 11 includes a temperature sensor and a humidity sensor, and the temperature sensor and the humidity sensor are installed at the bus joint and used for acquiring temperature and humidity signals at the bus joint in real time.
Preferably, the temperature sensor is a resistance temperature sensor.
Preferably, the humidity sensor employs a DHT11 probe.
Preferably, the repeater 2 forwards the received temperature and humidity data to the remote monitoring terminal 3 in a WiFi, network cable or RS485 bus manner.
The preferred embodiment provides an intelligent bus temperature and humidity monitoring controller based on ZigBee, bus temperature and humidity monitoring based on ZigBee wireless communication technology can effectively solve the problems that a wired network needs additional wiring, the structure is complex, the existing network communication is not smooth and the like, and the real-time monitoring function of intelligent bus temperature/humidity with low power consumption, low price and high reliability is realized.
Preferably, the ZigBee module 13 transmits the processed temperature and humidity data to the relay 2 by using a ZigBee wireless communication technology, in which a clustering routing mechanism is used.
Preferably, in each round of clustering stage, each sensor node generates a random number between 0 and 1, and when the random number is smaller than an election threshold, the sensor node is selected as a temporary cluster head, wherein an election threshold t (i) corresponding to a sensor node i has a calculation formula as follows:
Figure GDA0002400287870000031
where p represents the expected clusterhead percentage, r represents the current round number, and G represents the most recent
Figure GDA0002400287870000032
Set of nodes in turn that do not become temporary clusterheads, E0(i) Represents the initial energy value of sensor node i, and e (i) represents the current energy value of sensor node i.
In the preferred embodiment, the random rotation is adopted to elect the temporary cluster head, so that the fairness of competition of the sensor nodes for the temporary cluster head in the network is ensured, the energy value of the sensor nodes is introduced into the election threshold value as the weight, the sensor nodes with more residual energy have more chances to be elected as the temporary cluster head, and the energy load of the network is balanced to a certain extent.
Preferably, after the election of the temporary cluster head is completed, the elected temporary cluster head is screened, specifically:
(1) firstly, determining a neighboring temporary cluster head of the temporary cluster head, and if the distance between two temporary cluster heads is smaller than the cluster radius corresponding to any one of the temporary cluster heads, and the two temporary cluster heads are neighboring temporary cluster heads, then the neighboring temporary cluster head set of the temporary cluster head Ci is expressed as:
Figure GDA0002400287870000033
in the formula, l (C)i，Cj) Indicating a temporary clusterhead CiAnd a temporary clusterhead CjThe distance between the two or more of the two or more,
Figure GDA0002400287870000034
indicating a temporary clusterhead CiThe radius of the cluster of (a),
Figure GDA0002400287870000035
indicating a temporary clusterhead CjCluster radius of (C)i) Indicating a temporary Cluster head CiThe neighbor temporary cluster head number of (1);
(2) the temporary cluster head performs final cluster head competition in a neighbor temporary cluster head set in a competition mode, selects the temporary cluster head with the maximum probability value as a final cluster head, and sets a temporary cluster head CiThe probability of becoming the final cluster head is g (C)i) Then g (C)i) The calculation formula of (2) is as follows:
Figure GDA0002400287870000036
in the formula, W (C)i) Indicating a temporary Cluster head CiNeighbor temporary cluster head, piece (C)j) Indicating a temporary clusterhead CjNumber of sensor nodes within cluster radius of (e) (C)j) Indicating a temporary clusterhead CjThe current value of the energy of the current,
Figure GDA0002400287870000037
indicating a temporary clusterhead CjAverage amount of data sent by sensor nodes within a cluster radius, EeWhich represents the unit energy consumption of the transmitted data,
Figure GDA0002400287870000038
indicating a temporary clusterhead CjCommunication radius of (e)fsA power amplification factor representing a free space model;
and after the final election of the cluster head nodes is finished, the cluster member nodes judge which cluster head is added according to the strength of the received signals, so that the clustering is finished.
The preferred embodiment screens the selected temporary cluster heads aiming at the phenomenon that the temporary cluster heads randomly selected by the method are distributed intensively and unevenly, and selects the temporary cluster heads in the neighbor temporary cluster head set in a competition mode, so that the finally selected cluster head nodes are prevented from being aggregated.
Preferably, in a data transmission stage after clustering is completed, the cluster head nodes transmit the temperature and humidity data collected in the cluster to the ZigBee coordinator in an inter-cluster multi-hop transmission manner, and the adjacent cluster head nodes also transmit the data in a multi-hop transmission manner.
In the data transmission stage, the preferred embodiment transmits the temperature and humidity data collected by the cluster head nodes to the ZigBee coordinator by adopting a inter-cluster multi-hop mode, so that the energy consumption of the cluster head nodes in the data transmission process can be effectively reduced.
Preferably, the data transmission between the adjacent cluster head nodes is realized by selecting an auxiliary routing node in the cluster between the adjacent cluster head nodes, firstly, a candidate node for election of the auxiliary routing node is selected, and if at least one neighbor node of a sensor node in the cluster where the cluster head node is located belongs to a neighbor cluster, the sensor node is a candidate node of the auxiliary routing node competing for the cluster head node;
defining a time threshold T, and broadcasting the candidate nodes after the time threshold is reachedThe information of the auxiliary routing node competing for the cluster head node is broadcasted, if the candidate nodes of the auxiliary routing node competing for the cluster head node receive the information of the competing auxiliary routing node, the competing auxiliary routing node is abandoned, and the device is arranged
Figure GDA0002400287870000041
For competing cluster head nodes CHiCandidate node of the auxiliary routing node, then the candidate node
Figure GDA0002400287870000042
The corresponding time thresholds are:
Figure GDA0002400287870000043
in the formula (I), the compound is shown in the specification,
Figure GDA0002400287870000044
representing candidate nodes
Figure GDA0002400287870000045
Corresponding time threshold, T0Indicating the time slot duration allocated to the transfer of control messages,
Figure GDA0002400287870000046
representing candidate nodes
Figure GDA0002400287870000047
Competition cluster head node CHiThe weight of the auxiliary routing node of (2),
Figure GDA0002400287870000048
Figure GDA0002400287870000049
wherein the content of the first and second substances,
Figure GDA00024002878700000410
representing candidate nodes
Figure GDA0002400287870000051
To its cluster head node CHiThe distance of (a) to (b),
Figure GDA0002400287870000052
representing a passing of a candidate node
Figure GDA0002400287870000053
The number of neighbor cluster head nodes that can be connected,
Figure GDA0002400287870000054
representing candidate nodes
Figure GDA0002400287870000055
To its neighbor cluster head node CHsThe distance of (a) to (b),
Figure GDA0002400287870000056
representing candidate nodes
Figure GDA0002400287870000057
The initial value of the energy,
Figure GDA0002400287870000058
representing candidate nodes
Figure GDA0002400287870000059
The current value of the energy of the current,
Figure GDA00024002878700000510
indicating a competing cluster head node CHiM (CH), a candidate node of the auxiliary routing node ofi) Indicating a competing cluster head node CHiThe number of candidate nodes of the secondary routing node,
Figure GDA00024002878700000511
representing candidate nodes
Figure GDA00024002878700000512
Current energy value of a1Denotes a constant of smaller value, q1And q is2Is a rightCoefficient of weight, and q1+q2＝1。
In the preferred embodiment, the auxiliary routing nodes are selected between the adjacent cluster head nodes in a broadcasting mode to realize multi-hop data transmission between the adjacent cluster heads, so that the data transmission distance of the cluster head nodes can be effectively reduced, the energy consumption of the cluster head nodes in data transmission is reduced, and the life cycle of the cluster head nodes is prolonged; because the auxiliary routing node is selected in a broadcasting mode, the auxiliary routing node is only required to be selected from the sensor nodes of which at least one neighbor node belongs to the neighbor cluster, so that the energy consumption of message transmission when the auxiliary routing node is selected can be effectively saved; in addition, in the defined weight formula of the competitive auxiliary routing node, the distance from the candidate node to the self cluster head node and the adjacent cluster head node is smaller, the currently consumed energy value is smaller, and the weight of the candidate node with more connected adjacent cluster heads is smaller, so that the time threshold set according to the weight is shorter, the probability that the candidate node selects the auxiliary routing node is increased, the elected auxiliary routing node has a longer service cycle, the distance of data transmission of the cluster head node can be effectively reduced, the diversity of next-hop cluster head node selection is ensured, and the energy consumption of message transmission when the cluster head node selects the auxiliary routing node is reduced.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims (5)

1. An intelligent bus temperature and humidity monitoring controller based on ZigBee is characterized by comprising a monitoring controller, a repeater and a remote monitoring terminal, wherein the monitoring controller comprises a temperature and humidity monitoring module, a microprocessor module and a ZigBee module, the temperature and humidity monitoring module is used for collecting temperature and humidity signals at a bus joint in real time and sending the collected signals to the microprocessor module for analysis and processing, the microprocessor module feeds the processed temperature and humidity data back to the ZigBee module, the ZigBee module transmits the processed temperature and humidity data to the repeater by adopting a ZigBee wireless communication technology and forwards the data to the remote monitoring terminal by the repeater, a clustering routing mechanism is adopted in the ZigBee wireless communication technology, the data enter a data transmission stage after clustering is completed, and cluster head nodes transmit the temperature and humidity data collected in a cluster to the coordinator by adopting a multi-hop transmission mode among cluster heads, the method comprises the following steps that data transmission is carried out between adjacent cluster head nodes in a multi-hop transmission mode, multi-hop transmission between the adjacent cluster head nodes is achieved by selecting auxiliary routing nodes in a cluster, candidate nodes of auxiliary routing nodes are selected for election, and if at least one neighbor node of a sensor node in the cluster where the cluster head nodes are located belongs to a neighbor cluster, the sensor node is a candidate node of the auxiliary routing node competing for the cluster head node;
defining a time threshold T, broadcasting a message for election the auxiliary routing node of the cluster head node by the candidate node after the time threshold is reached in a broadcasting mode, abandoning election of the auxiliary routing node by the candidate node of other auxiliary routing nodes competing for the cluster head node if the candidate node of the auxiliary routing node receives the message for election the auxiliary routing node, and setting
Figure FDA0002400287860000011
For competing cluster head nodes CHiCandidate node of the auxiliary routing node, then the candidate node
Figure FDA0002400287860000012
The corresponding time thresholds are:
Figure FDA0002400287860000013
in the formula (I), the compound is shown in the specification,
Figure FDA0002400287860000014
to representCandidate node
Figure FDA0002400287860000015
Corresponding time threshold, T0Indicating the time slot duration allocated to the transfer of control messages,
Figure FDA0002400287860000016
representing candidate nodes
Figure FDA0002400287860000017
Competition cluster head node CHiThe weight of the auxiliary routing node of (2),
Figure FDA0002400287860000018
Figure FDA0002400287860000019
wherein the content of the first and second substances,
Figure FDA00024002878600000110
representing candidate nodes
Figure FDA00024002878600000111
To its cluster head node CHiThe distance of (a) to (b),
Figure FDA00024002878600000112
representing a passing of a candidate node
Figure FDA00024002878600000113
The number of the neighbor cluster head nodes that can be connected,
Figure FDA00024002878600000114
representing candidate nodes
Figure FDA00024002878600000115
To its neighbor cluster head node CHsThe distance of (a) to (b),
Figure FDA00024002878600000116
representing candidate nodes
Figure FDA00024002878600000117
The initial value of the energy of the light source,
Figure FDA00024002878600000118
representing candidate nodes
Figure FDA00024002878600000119
The current value of the energy of the current,
Figure FDA00024002878600000120
indicating a competing cluster head node CHiM (CH), a candidate node of the auxiliary routing node ofi) Indicating a competing cluster head node CHiThe number of candidate nodes of the secondary routing node,
Figure FDA00024002878600000121
representing candidate nodes
Figure FDA0002400287860000021
Current energy value of a1Denotes a constant of smaller value, q1And q is2Is a weight coefficient, and q1+q2The remote monitoring terminal comprises a data display unit and a danger alarm unit, wherein the data display unit is used for displaying received temperature and humidity data in real time, and the danger alarm unit is used for alarming when the temperature or humidity data exceed a safety threshold value.
2. The intelligent bus temperature and humidity monitoring controller based on ZigBee of claim 1, wherein the temperature and humidity monitoring module comprises a temperature sensor and a humidity sensor, and the temperature sensor and the humidity sensor are installed at a bus joint and used for collecting temperature and humidity signals at the bus joint in real time.
3. The ZigBee-based intelligent bus temperature and humidity monitoring controller as claimed in claim 2, wherein the temperature sensor is a resistance temperature sensor.
4. The ZigBee-based intelligent bus temperature and humidity monitoring controller as claimed in claim 3, wherein the humidity sensor employs a DHT11 probe.
5. The ZigBee-based intelligent bus temperature and humidity monitoring controller as claimed in claim 4, wherein the repeater forwards the received temperature and humidity data to the remote monitoring terminal in a WiFi, network cable or RS485 bus manner.
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