CN110543131B - Emergency notification system for machine room - Google Patents
Emergency notification system for machine room Download PDFInfo
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- CN110543131B CN110543131B CN201910959007.9A CN201910959007A CN110543131B CN 110543131 B CN110543131 B CN 110543131B CN 201910959007 A CN201910959007 A CN 201910959007A CN 110543131 B CN110543131 B CN 110543131B
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- 238000004891 communication Methods 0.000 claims abstract description 7
- 230000007613 environmental effect Effects 0.000 claims abstract description 7
- 238000012545 processing Methods 0.000 claims abstract description 6
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 9
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 5
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 3
- 230000006855 networking Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
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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
- G05B19/0423—Input/output
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
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Abstract
The invention discloses a machine room emergency notification system, which can comprise a host, a collection node, a positioning node, a sensor and an upper computer, wherein the host, the collection node and the positioning node are all provided with ZigBee modules to form a ZigBee wireless local area network, the ZigBee modules of the host are used as a coordinator, the ZigBee modules of the collection node and the positioning node are used as routers, the sensor is electrically connected with the collection node, the upper computer is in communication connection with the host, and the collection node is used for collecting environmental data through the sensor and then broadcasting and sending the collected data at regular time; the positioning node is used for receiving the data sent by the acquisition node, detecting and processing the position information of the acquisition node, sending the processed data to the host computer at fixed points, and the upper computer is used for displaying the data sent by the host computer.
Description
Technical Field
The invention belongs to the field of machine room monitoring equipment, and particularly relates to a machine room emergency notification system.
Background
In recent years, the number of emergency plans generated in a machine room is continuously increased, and the problem of how to strengthen safe production and improve the working efficiency of early warning and post-remediation is solved before the lead and the main departments of all levels. Under the conditions of high-speed development of economy and shortage of energy supply, the relationship of how to process and guarantee safety and improve the usability of the system needs to be studied intensively. The economic development cannot be at the cost of environment and life, so that the informatization management level of the safety production is improved, the long-acting mechanism of the safety production with disaster prevention and remedy as main targets is enhanced, and the method is a necessary way of the safety production work in China.
Under extreme environments, such as typhoons, earthquakes and the like, and under the condition that a network is not available, a monitoring system independent of a traditional network is needed to monitor the environment of a machine room.
Disclosure of Invention
The invention aims to provide a machine room emergency notification system so as to solve the technical problems. For this purpose, the invention adopts the following specific technical scheme:
the system comprises a host, a collection node, a positioning node, a sensor and an upper computer, wherein the host, the collection node and the positioning node are respectively provided with a ZigBee module so as to form a ZigBee wireless local area network, the ZigBee modules of the host are used as a coordinator, the ZigBee modules of the collection node and the positioning node are used as routers, the sensor is electrically connected with the collection node, the upper computer is in communication connection with the host, and the collection node is used for collecting environmental data through the sensor and then broadcasting and sending the collected data at regular time; the positioning node is used for receiving the data sent by the acquisition node, detecting and processing the position information of the acquisition node, sending the processed data to the host computer at fixed points, and the upper computer is used for displaying the data sent by the host computer.
Further, the data format sent by the collection node is as follows:
| 0 | 1 | 2 | 3 | 4 | 5 | (6-13) | (14 15) |
| 'c' | 'a' | 'i' | 'R' | 'O' | 'U' | IEEE | NID |
| 16 | 17 | 18 | 19 | 20 | 21 | ||
| Mark | Temp | CO | H2S | REF.x | FEF.y |
wherein, 0-5 bit is the name of the acquisition node, IEEE is the physical address, NID is the network address, mark=0 represents the acquisition node, temp is the temperature value, CO is the carbon monoxide concentration, H2S is the hydrogen sulfide concentration, REF.x and REF.y are the geographic position coordinates of the reference node.
Further, the positioning node detects the position information of the acquisition node specifically as follows: according to the detected link quality information LQI value of the acquisition node, a distance value between the positioning node and the acquisition node is obtained by using an interpolation method, and the LQI value, the geographic position coordinate and the distance value are stored in a structural body, wherein the structural body has the following format:
wherein x and y are geographical position coordinates of the acquisition node, LQI is a link quality information LQI value, and Distance is a Distance value between the positioning node and the acquisition node.
Further, the host computer is connected with the upper computer through serial communication.
Further, the host, positioning node and acquisition node each comprise a CC2430 host processor.
Further, the acquisition node includes a mobile wearable device having a pulse detection module.
Further, the ZigBee wireless local area network is a mesh network.
By adopting the technical scheme, the invention has the beneficial effects that: the machine room emergency notification system is independent of a network system of a machine room, and is safer and more reliable than the existing machine room monitoring system.
Drawings
For further illustration of the various embodiments, the invention is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present invention. The components in the figures are not drawn to scale and like reference numerals are generally used to designate like components.
FIG. 1 is a schematic block diagram of a machine room emergency notification system according to an embodiment of the present invention;
FIG. 2 is a schematic circuit diagram of the machine room emergency notification system shown in FIG. 1;
FIG. 3 is a workflow diagram of a host of the machine room emergency notification system shown in FIG. 1;
FIG. 4 is a workflow diagram of an acquisition node of the machine room emergency notification system shown in FIG. 1;
fig. 5 is a workflow diagram of a positioning node of the machine room emergency notification system shown in fig. 1.
Detailed Description
The invention will now be further described with reference to the drawings and detailed description.
Fig. 1 shows a machine room emergency notification system according to an embodiment of the invention. The whole hardware of the machine room emergency notification system takes CC2430 of TI company as a main processor, and is matched with peripheral serial ports and various sensors to form a minimum measurement and control system, and the schematic diagram of the system is shown in figure 2. The machine room emergency notification system can comprise a host 1, an acquisition node 2, a positioning node 3, a sensor 4 and an upper computer 5. The host 1, the acquisition node 2 and the positioning node 3 are all provided with ZigBee modules so as to form a ZigBee wireless local area network. The ZigBee module of the host 1 is used as a coordinator, and the ZigBee modules of the acquisition node 2 and the positioning node 3 are used as routers. It should be noted that: the network is a mesh network, and the acquisition node and the positioning node belong to routers. Since the router programs are identical, we use to distinguish between the two devices by reading the level of the external input pin p1_0. The specific networking process is as follows:
firstly, a wireless local area network is built through a coordinator, and the networking mode of the coordinator is power-on immediate networking.
Second, the router joins the network. After the router is powered on, it immediately searches whether the router owns a proper zigbee network, and if so, sends a join request.
The specific structure and workflow of the host 1, the acquisition node 2 and the positioning node 3 are described below, respectively.
1. Host machine
The main functions of the host are as follows:
(1) When the system starts, the coordinator performs networking;
(2) When receiving the router joining request, assigning a network ID number to the router joining request;
(3) And integrating the data sent by the positioning nodes and then transmitting the integrated data to the upper computer for display through the serial port.
The working flow chart is shown in fig. 3, and is specifically as follows:
first, the host performs networking through its ZigBee module (i.e., coordinator). After the host is electrified, automatically sending a network construction request, waiting for networking feedback information, and if the networking is unsuccessful, retransmitting the networking request after a period of time delay until the networking is successful.
Second, it is determined whether a router (acquisition node or positioning node) is added. If so, the network ID number is allocated to the network address, the physical address and the network address are stored through a linked list, and a message of successfully joining the network is sent through a serial port.
Finally, the data sent by the positioning node is received, and the data sent by the positioning node can be received by the host because the data sent by the acquisition node is broadcast, and the processed data of the acquisition node is contained in the data sent by the positioning node, so that the host only needs to process the data of the positioning node. And reading the data of the positioning nodes, dividing the data, and sending the divided data to an upper computer for display through a serial port. In this embodiment, the host computer is connected to the upper computer through serial communication. Of course, other communication connection methods well known to those skilled in the art can be adopted between the upper computer and the host.
2. Acquisition node
The main functions of the acquisition node are as follows:
(1) When power is on, the wireless local area network is requested to be added by sending a network adding request, and data is sent, wherein the data format is as follows:
the purpose of sending the data is to alert the user if the joining of the network was successful.
(2) Data of each environment sensor is collected and broadcast. In a specific embodiment, the environmental sensor includes a temperature sensor, a carbon monoxide gas sensor, and a hydrogen sulfide sensor. In this case, the data format transmitted by the acquisition point is as follows:
wherein IEEE is a physical address, NID is a network address, mark=0 flag bit acquisition node,
temp is a temperature value, which is a degree celsius value, and if the ambient temperature is 25 ℃, 25 is sent. CO is the carbon monoxide concentration, H2S is the hydrogen sulfide concentration, and REF.x and REF.y are the geographical location coordinates of the reference node.
It should be appreciated that the electrical connection between the sensor and the collection node may be made by wired or wireless means. Of course, the acquisition node and the environmental sensor may also be integrated.
In addition, the acquisition node may also include a mobile wearable device having a pulse detection module. When the machine room manager wears the mobile wearing equipment, the upper computer can monitor the position of the machine room manager.
In this embodiment, the temperature sensor is an AD590. Which is a monolithically integrated two-terminal temperature-sensing current source produced by analog devices corporation of the united states. Its main characteristics are as follows:
(1) The temperature is linearly related to the voltage.
(2) The temperature measurement range of AD590 is-55 ℃ to +150 ℃.
(3) The power supply voltage range of AD590 is 4V-30V. AD590 can withstand 44V forward voltage and 20V reverse voltage, and thus the device reverse connection is not damaged.
(4) The precision is high, and the nonlinear error is +/-0.3 ℃.
The temperature values were calculated as: temperature= (acquisition voltage value 100-273) deg.c. Therefore, the temperature of the environment can be obtained by performing AD conversion on the acquired output voltage of the AD590 and then performing simple algebraic calculation.
In this embodiment, the carbon monoxide gas sensor is MQ-7.MQ-7 is a sensing element composed of a miniature AL2O3 ceramic tube, a SnO2 sensing layer, a measuring electrode and a heater, and is fixed in a cavity made of plastic or stainless steel. The heater provides necessary working conditions for the gas sensor, the filter cavity filled with active carbon further weakens the interference of nitrogen oxides and alkane gases, and the packaged gas sensor has 6 needle-shaped pins, 4 pins for signal extraction and 2 pins for heating current supply.
Working principle: the sensor surface resistance Rs is obtained by outputting an effective voltage signal VRL on a load resistor RL connected in series with the sensor surface resistance Rs, and the relation between the two is:
Rs/RL＝(Vc-VRL)/VRL。
3. positioning node
The main functions of the positioning node are as follows:
(1) Power-on joining network
(2) Receiving and processing data of the acquisition node
(3) And sending the integrated data of the acquisition nodes and the positioning information of the acquisition nodes to a coordinator at fixed points.
The working flow chart is shown in fig. 5, when the positioning node successfully joins the network, the positioning node can receive the data of the acquisition node, process the data, and send the data to the host after the data acquisition processing is completed.
Specifically, when the positioning node receives data, it first determines whether the data is an acquisition node, that is, whether the 16 th bit Mark value of the transmitted data is 0. And secondly, storing the environmental information acquired by the acquisition node. Because the stored media are arrays, the length of the stored media is the number of the acquisition nodes, when the data enter the positioning nodes, the oldest data in the past are circularly covered, and the received link quality information LQI value and the geographic position of the acquisition nodes are stored in a structural body, and the format of the structural body is as follows:
the x and y are read from the data packet sent by the acquisition node, the x, y and LQI values of the acquisition node are respectively the LQI values of the link quality information of the acquisition node, and the Distance is used for recording the Distance between the two receiving and transmitting nodes. The LQI value has a certain relation with the distance between the two receiving and transmitting nodes, so the distance between the two receiving and transmitting nodes can be obtained through the LQI value obtained through actual measurement. More specifically, the table is queried by the received data LQI value, and the closest Distance value is found and then stored in the Distance data of the corresponding structure.
The data between the actual measured LQI value and distance are shown in table 1:
TABLE 1
Description: LQI1 and LQI2 are two measurements from near and far to near, respectively.
Interpolation is performed by adopting the open condition, and the obtained LQI value and distance query table is shown in Table 2:
TABLE 2
| Distance (cm) | 130 | 140 | 150 | 160 | 170 | 180 | 190 | 200 |
| LQI | 43 | 41 | 39 | 37 | 36 | 35 | 34 | 33 |
| Distance (cm) | 210 | 220 | 230 | 240 | 250 | 260 | 270 | 280 |
| LQI | 33 | 32 | 32 | 31 | 31 | 29 | 26 | 23 |
| Distance (cm) | 290 | 300 | 310 | 320 | 330 | 340 | 350 | 360 |
| LQI | 21 | 19 | 17 | 15 | 13 | 12 | 11 | 10 |
| Distance (cm) | 370 | 380 | 390 | 400 | 430 | 450 | 500 | 530 |
| LQI | 9 | 8 | 7 | 7 | 6 | 5 | 5 | 4 |
| Distance (cm) | 550 | 600 | 650 | 700 | 800 | |||
| LQI | 3 | 3 | 2 | 1 | 0 |
The working principle of the machine room emergency notification system of the present invention is briefly described below. The acquisition node acquires environmental data and the like through various sensors connected with the acquisition node, and then periodically broadcasts and transmits the acquired data; the positioning node acquires equipment information and environment information and receives data sent by the acquisition node, and positions personnel by receiving the signal intensity of the data of the acquisition node and the geographic position of the acquisition node, and the acquisition node sends the data to the host at fixed points after finishing the data processing; the host computer feeds back the data to the upper computer for display through the serial port in real time. The machine room emergency notification system is independent of the existing machine room network system, so that the machine room can be monitored under the emergency situations such as fire disaster and the like of the machine room, the safety of working personnel of the machine room is ensured, and the machine room emergency notification system is safer and more reliable than the existing machine room monitoring system.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (3)
1. The machine room emergency notification system is characterized by comprising a host, acquisition nodes, positioning nodes, sensors and an upper computer, wherein the host, the acquisition nodes and the positioning nodes are all provided with ZigBee modules so as to form a ZigBee wireless local area network, the ZigBee modules of the host are used as a coordinator, the ZigBee modules of the acquisition nodes and the positioning nodes are used as routers, the sensors are electrically connected with the acquisition nodes, the upper computer is in communication connection with the host, and the acquisition nodes are used for acquiring environmental data through the sensors and then broadcasting and sending the acquired data at regular time; the positioning node is used for receiving the data sent by the acquisition node, detecting and processing the position information of the acquisition node, sending the processed data to the host at fixed points, and the upper computer is used for displaying the data sent by the host;
the data format sent by the acquisition node is as follows:
wherein, 0-5 bits are the name of the acquisition node, IEEE is a physical address, NID is a network address, mark=0 represents the acquisition node, temp is a temperature value, CO is a carbon monoxide concentration, H2S is a hydrogen sulfide concentration, REF.x and REF.y are geographical position coordinates of the reference node;
the positioning node detects the position information of the acquisition node and specifically comprises the following steps: according to the detected link quality information LQI value of the acquisition node, a distance value between the positioning node and the acquisition node is obtained by using an interpolation method, and the LQI value, the geographic position coordinate and the distance value are stored in a structural body, wherein the structural body has the following format:
wherein x and y are geographic position coordinates of the acquisition node, LQI is a link quality information LQI value, and Distance is a Distance value between the positioning node and the acquisition node;
the acquisition node comprises a mobile wearable device, and the mobile wearable device is provided with a pulse detection module.
2. The machine room emergency notification system of claim 1, wherein the host computer is connected to the host computer through serial communication.
3. The machine room emergency notification system of claim 1, wherein the ZigBee wireless local area network is a mesh network.
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| CN110543131B true CN110543131B (en) | 2024-03-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105872064A (en) * | 2016-04-21 | 2016-08-17 | 珠海市埃帝尔软件技术有限公司 | System and method for indoor monitoring positioning based on cloud computing and sensor network |
| WO2017012468A1 (en) * | 2015-07-17 | 2017-01-26 | 袁丽 | Wireless communication system and method for smart traffic monitoring |
| CN206908869U (en) * | 2017-06-21 | 2018-01-19 | 湖北民族学院 | A kind of electric inspection process robot positioning system based on ZigBee technology |
| CN211826933U (en) * | 2019-10-10 | 2020-10-30 | 厦门理工学院 | Emergency notification system for machine room |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2652996A1 (en) * | 2010-12-13 | 2013-10-23 | Xandem Technology, LLC | Systems and methods of device-free motion detection and presence detection |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017012468A1 (en) * | 2015-07-17 | 2017-01-26 | 袁丽 | Wireless communication system and method for smart traffic monitoring |
| CN105872064A (en) * | 2016-04-21 | 2016-08-17 | 珠海市埃帝尔软件技术有限公司 | System and method for indoor monitoring positioning based on cloud computing and sensor network |
| CN206908869U (en) * | 2017-06-21 | 2018-01-19 | 湖北民族学院 | A kind of electric inspection process robot positioning system based on ZigBee technology |
| CN211826933U (en) * | 2019-10-10 | 2020-10-30 | 厦门理工学院 | Emergency notification system for machine room |
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