CN113464849A - Ore pulp pipeline displacement fault detection system based on ZigBee and multi-hop routing - Google Patents
Ore pulp pipeline displacement fault detection system based on ZigBee and multi-hop routing Download PDFInfo
- Publication number
- CN113464849A CN113464849A CN202110646010.2A CN202110646010A CN113464849A CN 113464849 A CN113464849 A CN 113464849A CN 202110646010 A CN202110646010 A CN 202110646010A CN 113464849 A CN113464849 A CN 113464849A
- Authority
- CN
- China
- Prior art keywords
- zigbee
- node
- displacement
- pipeline
- ore pulp
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 38
- 238000001514 detection method Methods 0.000 title claims abstract description 12
- 238000004891 communication Methods 0.000 claims abstract description 22
- 230000003321 amplification Effects 0.000 claims description 16
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 16
- 230000001133 acceleration Effects 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 5
- 238000004364 calculation method Methods 0.000 claims description 3
- 230000008054 signal transmission Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 12
- 238000012544 monitoring process Methods 0.000 abstract description 5
- 239000002002 slurry Substances 0.000 abstract description 5
- 238000003912 environmental pollution Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
本发明涉及一种基于ZigBee与多跳路由的矿浆管道位移故障检测系统，在矿浆管道的各接口处设置若干采集节点，在中控室设置一个协调节点，并采用ZigBee无线通信技术组建自组网络，各采集节点和协调节点能相互通信，实现管道沿线数据无线传输、管道位移量实时监测；系统采用AVDOjr多跳路由算法，实现级联方式长距离数据传输、网络自愈功能，在某个节点故障的情况下任能正常工作；采集节点采集到的位移信息经无线自组网络传送到协调节点，再由协调节点通过RS232总线传送到PC机中，由PC机进行数据的显示、保存；本发明可实时在线监测矿浆管道的位移故障情况，并做出预警，有效保障了矿浆管道输送的稳定运行、减少因管道地基位移导致的经济损失和环境污染。
The invention relates to a slurry pipeline displacement fault detection system based on ZigBee and multi-hop routing. Several acquisition nodes are set at each interface of the ore slurry pipeline, a coordination node is set in the central control room, and ZigBee wireless communication technology is used to form a self-organized network. Each acquisition node and coordination node can communicate with each other to realize wireless data transmission along the pipeline and real-time monitoring of pipeline displacement; the system adopts AVDOjr multi-hop routing algorithm to realize cascaded long-distance data transmission and network self-healing function. It can work normally under the circumstance; the displacement information collected by the collecting node is transmitted to the coordinating node through the wireless ad hoc network, and then transmitted to the PC by the coordinating node through the RS232 bus, and the data is displayed and saved by the PC; the invention It can monitor the displacement failure of the slurry pipeline online in real time, and make an early warning, which effectively guarantees the stable operation of the slurry pipeline transportation and reduces the economic loss and environmental pollution caused by the displacement of the pipeline foundation.
Description
Technical Field
The invention relates to a pulp pipeline displacement fault detection system based on ZigBee and multi-hop routing, and belongs to the technical field of measurement and control.
Background
The slurry pipeline is a special conveying pipeline which mixes granular solid minerals with a liquid medium, transports the mixture by adopting a pumping method and separates the mixture at the terminal of the pipeline. Compared with the traditional transportation modes (railway and road), the pipeline transportation has the following characteristics: (1) the investment is less and the construction speed is high; (2) the method is not limited by the terrain, the line distance is short, and the transportation cost is low; (3) the occupied area is small, and the soil can still be cultivated after the pipeline is buried; (4) not influenced by climate change; (5) no-load reverse transportation exists, and the cost is saved; (6) the equipment is reliable in operation and low in maintenance cost; (7) no noise and environmental pollution are generated; (8) the automation degree is high, and a large amount of manpower and energy can be saved. The long-distance ore pulp pipeline transportation is the most economic, efficient and reliable mineral transportation mode at present, and plays an important role in resource development of remote mines far away from a railway line, relieving railway transportation tension, and solving the problems of outward transportation of concentrate and tailing discharge.
Due to the restriction of the mineral origin place, most of the ore pulp pipelines are laid in mountainous areas with steep mountains, complex terrains and inconvenient traffic. The Kunming big red mountain iron ore concentrate conveying pipeline is a long-distance ore pulp conveying pipeline with the longest distance, the highest lift and the most pump stations in China, and three pump stations and four intermediate pressure monitoring stations are arranged along the way. The pipeline has complex terrain along the way, needs to cross over three mountains and spans 38 river valleys. In this region, the possibility that mountain landslide mud-rock flow takes place in rainwater weather is very big, and mountain in case not hard up pipeline foundation in a single day becomes flexible etc. reason and leads to the pipeline displacement, and the accumulation of pipeline displacement is very big to pipeline harm, and especially is very big to the influence of the monolithic connection degree of pipeline, the phenomenon such as pipeline fracture appears very probably. Once a disaster occurs, the damage to the pipeline transportation capacity is great, and the pollution to the surrounding environment is also serious. Reliable sensors and electrical equipment are needed to be additionally adopted, a high-efficiency and real-time detection system is designed, displacement of pipelines along the line is checked, timely early warning is made on disasters, and unnecessary economic loss and environmental pollution are avoided.
Disclosure of Invention
The invention aims to solve the technical problem of providing an ore pulp pipeline displacement fault detection system based on ZigBee and multi-hop routing, which can monitor the displacement condition of an ore pulp pipeline along the line in real time and can timely and effectively give an early warning when the displacement exceeds a certain threshold value. The system adds an AVDOjr multi-hop algorithm, realizes a network self-healing function, realizes data cascade transmission, overcomes the defect of short communication distance of the traditional ZigBee detection system, meets the communication requirement under the condition of long-distance pipelines, and solves the safety problem of pipeline lines caused by pipeline displacement when ore pulp is conveyed.
The technical scheme of the invention is as follows: a pulp pipeline displacement fault detection system based on ZigBee and multi-hop routing comprises a pipeline, acquisition nodes, coordination nodes and a PC (personal computer); the collection node is installed at the pipeline interface, the coordination node is installed at the top of the central control room, and the PC is fixed in the central control room.
And the coordination nodes arranged in the central control room establish a wireless ad hoc network, and the acquisition nodes arranged at the joints of all the ore pulp pipelines gradually join the ad hoc network to form a complete detection communication network. And then the acquisition node periodically detects the acceleration signal at the position through a sensor, and after data processing, the acquisition node obtains the displacement and transmits the displacement to the coordination node through a wireless network. And finally, after receiving the acquisition node signal, the coordination node uploads the acquisition node signal to a PC (personal computer) through an RS232 communication module, carries out real-time monitoring on the software of the PC and stores data.
The acquisition node comprises a sensor, a ZigBee main control chip and a power amplification antenna; the sensor is connected with the ZigBee main control chip, the ZigBee main control chip is connected with the power amplification antenna, and the sensor, the ZigBee main control chip and the power amplification antenna are respectively connected with the solar power supply module.
The coordination node comprises a ZigBee main control chip, a power amplification antenna and an RS232 communication module; the ZigBee main control chip is respectively connected with the power amplification antenna and the RS232 communication module, and the RS232 communication module and the PC are used for signal transmission.
The main control chip of the acquisition node and the coordination node adopts CC2530, the SOC chip integrates the MCU and the ZigBee core encoder, and the peripheral circuit is simple and easy to develop; the radio frequency ends of all nodes of the system are provided with a power amplifier and a low noise amplifier; the sensor adopts an MEMS six-axis motion processing sensor MPU6050, a 16-bit mode is set, the measuring range is plus or minus 16g, and the displacement is obtained by output digital acceleration values through secondary integral calculation; the system power supply adopts a solar power supply module with an MPPT controller, 1.6W and 3.2V output to supply power, and the requirement of a low-power-consumption system is met; data transmission between nodes adopts a ZigBee multi-hop algorithm, a network self-healing function is realized, and the whole network can still work normally under the condition that a certain node fails.
The invention can effectively ensure the operation of pipeline transportation and reduce the economic loss and environmental pollution caused by the displacement of the pipeline foundation. The system uses the solar power supply module to supply power, and effectively avoids the trouble of difficult power supply and battery replacement under the condition of complex terrain. Meanwhile, the invention has the advantages of simple structure, easy installation and debugging, stability and reliability.
The invention has the beneficial effects that: the system applies the ZigBee wireless communication technology to pipeline displacement monitoring, and has the characteristics of low power consumption and convenience in installation and construction; the MEMS six-axis motion processing sensor has the characteristics of small volume, high integration level, simple interface circuit and low application cost; by utilizing the AVDOjr multi-hop algorithm, multi-hop transmission can be realized among the nodes, and the network has a self-healing function and certain popularization and application values.
Drawings
FIG. 1 is a schematic diagram of an implementation layout of the present invention;
FIG. 2 is a block diagram of the system of the present invention;
FIG. 3 is a schematic diagram of a power amplifying antenna of the present invention;
fig. 4 is a flow chart of a collection node program of the present invention.
In the figure: the system comprises a pipeline 1, a collection node 2, a coordination node 3, a solar power supply module 4, a PC 5, a sensor 6, a main control chip CC2530, a power amplification antenna 8, an RS232 communication module 9 and a power amplifier 10.
Detailed Description
The invention is further described with reference to the following drawings and detailed description.
Example 1: as shown in fig. 1, in a pulp pipeline displacement fault detection system based on ZigBee and multi-hop routing, a plurality of acquisition nodes are arranged at each interface of a pulp pipeline, a coordination node is arranged in a central control room, and an ad hoc network is established by using a ZigBee wireless communication technology, and each acquisition node and the coordination node can communicate with each other, so that wireless transmission of data along the pipeline and real-time monitoring of pipeline displacement are realized; the system adopts AVDOjr multi-hop routing algorithm to realize the functions of long-distance data transmission and network self-healing in a cascade mode, and can work normally under the condition that a certain node fails; the displacement information acquired by the acquisition node is transmitted to the coordination node through the wireless ad hoc network, and then transmitted to the PC through the RS232 bus by the coordination node, and the data is displayed and stored by the PC.
The system comprises a pipeline 1, a collection node 2, a coordination node 3 and a PC (personal computer) 5. The collection node 2 is installed at the interface of the pipeline 1, the coordination node 3 is installed at the top of the central control room, and the PC 5 is fixed in the central control room. And a coordination node 3 arranged in a central control room establishes a wireless ad hoc network, and acquisition nodes 2 arranged at the joints of the ore pulp pipelines 1 gradually join the ad hoc network to form a complete detection communication network.
As shown in fig. 2, the acquisition node 2 includes a sensor 6, a ZigBee main control chip 7, and a power amplification antenna 8; the sensor 6 is connected with a ZigBee main control chip 7, the ZigBee main control chip 7 is connected with a power amplification antenna 8, and the sensor 6, the ZigBee main control chip 7 and the power amplification antenna 8 are respectively connected with the solar power supply module 4.
The coordination node 3 comprises a ZigBee main control chip 7, a power amplification antenna 8 and an RS232 communication module 9; the ZigBee main control chip 7 is respectively connected with the power amplification antenna 8 and the RS232 communication module 9, and the RS232 communication module 9 is in signal transmission with the PC 5.
The sensor 6 sends the acquired acceleration signal into the ZigBee main control chip 7, the acceleration signal is subjected to secondary integration to obtain displacement, and the displacement is transmitted through a wireless network. The displacement information collected by the collection node 2 is transmitted to the coordination node 3, and then transmitted to the PC 5 through the RS232 communication module 9. The collection node 2 is used as a terminal node to collect and send data, has the functions of a routing node and a repeater, and realizes data receiving and forwarding.
The pipeline is located in a mountainous area with an altitude of three kilometers, the terrain is complex, wired wires are not easy to lay, and the collection node 2 is powered by the solar power supply module 4.
The invention adopts AVDOjr algorithm when the nodes are networked, and realizes the functions of data cascade, multi-hop transmission and network self-healing. And a plurality of acquisition nodes 2, wherein adjacent acquisition nodes 2 are spaced by 200 meters, and 400m between spaced nodes belongs to a communication range of 1km for line-of-sight transmission. Even if one node in the middle has a problem, the node can skip the connection of the first-level node and access the next-level node route in a multi-hop mode, and the reliability of communication is ensured.
The ZigBee main control chip 7 is a CC2530 chip.
The solar power supply module 4 is provided with an MPPT controller.
The sensor 6 adopts an MEMS six-axis motion processing sensor MPU6050, a 13-bit mode is set, the measuring range is plus or minus 16g, and the displacement is obtained by output digital acceleration values through twice integral calculation.
As shown in fig. 3, the ZigBee main control chip 7 based on the ZigBee protocol is a low power consumption device, the transmission power is not high, and in order to increase the transmission distance, a power amplifier 10 and a low noise amplifier are additionally installed at the ZigBee transmit-receive end. The line-of-sight transmission distance between every two wireless modules can reach one kilometer.
As shown in fig. 4, the acquisition node 2 is implemented as follows: firstly, initializing a sensor 6 and a ZigBee main control chip 7 in an acquisition node 2, setting timing time in the ZigBee main control chip 7, and reading whether network information has data to be forwarded or not when the timing time is up; if the timing time is not up, reading the output data of the sensor and calculating the displacement, calculating the size of the displacement, judging whether the threshold is exceeded or not, if the threshold is reached, sending an alarm, and sending the data; if not, turning to timing, and if the timing time is up, judging whether data needs to be forwarded, if so, forwarding the data, and if not, continuing to count down.
While the present invention has been described in detail with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, and various changes can be made without departing from the spirit and scope of the present invention.
Claims (7)
1. The utility model provides an ore pulp pipeline displacement fault detection system based on zigBee and multihop route which characterized in that: the system comprises a pipeline (1), a collection node (2), a coordination node (3) and a PC (personal computer) (5);
the acquisition node (2) is installed at the interface of the pipeline (1), the coordination node (3) is installed at the top of the central control room, and the PC (5) is fixed in the central control room;
the coordination nodes (3) installed in the central control room establish a wireless ad hoc network, and the acquisition nodes (2) installed at the joints of the ore pulp pipelines (1) gradually join the ad hoc network to form a complete detection communication network.
2. The system for detecting the displacement fault of the ore pulp pipeline based on ZigBee and multi-hop routing according to claim 1, wherein: the acquisition node (2) comprises a sensor (6), a ZigBee main control chip (7) and a power amplification antenna (8);
the sensor (6) is connected with the ZigBee main control chip (7), the ZigBee main control chip (7) is connected with the power amplification antenna (8), and the sensor (6), the ZigBee main control chip (7) and the power amplification antenna (8) are respectively connected with the solar power supply module (4).
3. The system for detecting the displacement fault of the ore pulp pipeline based on ZigBee and multi-hop routing according to claim 1, wherein: the coordination node (3) comprises a ZigBee main control chip (7), a power amplification antenna (8) and an RS232 communication module (9); the ZigBee main control chip (7) is respectively connected with the power amplification antenna (8) and the RS232 communication module (9), and the RS232 communication module (9) is in signal transmission with the PC (5).
4. The system for detecting the displacement fault of the ore pulp pipeline based on ZigBee and multi-hop routing according to claim 2 or 3, wherein: and a power amplifier (10) and a low noise amplifier are additionally arranged at the transmitting and receiving end of the ZigBee main control chip (7).
5. The system for detecting the displacement fault of the ore pulp pipeline based on ZigBee and multi-hop routing according to claim 4, wherein: the ZigBee main control chip (7) is a CC2530 chip.
6. The system for detecting the displacement fault of the ore pulp pipeline based on ZigBee and multi-hop routing according to claim 2, wherein: the solar power supply module (4) is provided with an MPPT controller.
7. The system for detecting the displacement fault of the ore pulp pipeline based on ZigBee and multi-hop routing according to claim 2, wherein: the sensor (6) adopts an MEMS six-axis motion processing sensor MPU6050, a 13-bit mode is set, the measuring range is plus or minus 16g, and the displacement is obtained by output digital acceleration values through twice integral calculation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110646010.2A CN113464849A (en) | 2021-06-10 | 2021-06-10 | Ore pulp pipeline displacement fault detection system based on ZigBee and multi-hop routing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110646010.2A CN113464849A (en) | 2021-06-10 | 2021-06-10 | Ore pulp pipeline displacement fault detection system based on ZigBee and multi-hop routing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113464849A true CN113464849A (en) | 2021-10-01 |
Family
ID=77869657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110646010.2A Pending CN113464849A (en) | 2021-06-10 | 2021-06-10 | Ore pulp pipeline displacement fault detection system based on ZigBee and multi-hop routing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113464849A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100094583A1 (en) * | 2006-10-05 | 2010-04-15 | Claudio Borean | Sensor network |
| CN202648641U (en) * | 2012-06-27 | 2013-01-02 | 昆明理工大学 | Pipeline displacement detection system based on zigbee wireless communication |
| CN204085562U (en) * | 2014-07-04 | 2015-01-07 | 魏晓斌 | A kind of wireless mine environment monitoring system based on ZigBee and GPRS |
| CN204649174U (en) * | 2015-04-23 | 2015-09-16 | 昆明理工大学 | A kind of device of monitoring piping displacement |
| CN205482806U (en) * | 2016-01-13 | 2016-08-17 | 昆明理工大学 | Pipeline displacement monitoring system based on zigBee and GPRS transmission |
| CN209166334U (en) * | 2018-12-06 | 2019-07-26 | 云南大学 | Length based on ZigBee multi-hop technology is away from piping displacement detection system |
-
2021
- 2021-06-10 CN CN202110646010.2A patent/CN113464849A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100094583A1 (en) * | 2006-10-05 | 2010-04-15 | Claudio Borean | Sensor network |
| CN202648641U (en) * | 2012-06-27 | 2013-01-02 | 昆明理工大学 | Pipeline displacement detection system based on zigbee wireless communication |
| CN204085562U (en) * | 2014-07-04 | 2015-01-07 | 魏晓斌 | A kind of wireless mine environment monitoring system based on ZigBee and GPRS |
| CN204649174U (en) * | 2015-04-23 | 2015-09-16 | 昆明理工大学 | A kind of device of monitoring piping displacement |
| CN205482806U (en) * | 2016-01-13 | 2016-08-17 | 昆明理工大学 | Pipeline displacement monitoring system based on zigBee and GPRS transmission |
| CN209166334U (en) * | 2018-12-06 | 2019-07-26 | 云南大学 | Length based on ZigBee multi-hop technology is away from piping displacement detection system |
Non-Patent Citations (1)
| Title |
|---|
| 靳振宇: "基于Zigbee技术的管道位移检测系统设置", 《中国优秀硕士硕士学位论文全文数据库-信息科技辑》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109474899A (en) | A kind of automatic monitoring RTU and group network system based on Beidou cloud Internet of Things | |
| CN101452629B (en) | Landslide Disaster Remote Monitoring System | |
| CN103968800A (en) | System and method for wireless monitoring of deformation of shield tunnel | |
| CN205121825U (en) | Tailing storehouse safety monitoring system | |
| CN108566437A (en) | Bolt fastening security remote control network system | |
| CN202331181U (en) | Frozen-thawed ring monitoring system for plateau frozen earth tunnel | |
| CN110176948A (en) | LoRa+PLC bimodulus built-in module and the communication structure and the means of communication for using the module | |
| CN105222840A (en) | Real-time monitoring system and method for let-down ecological flow of hydraulic and hydroelectric engineering | |
| CN209105464U (en) | A kind of automatic monitoring RTU and group network system based on Beidou cloud Internet of Things | |
| Nguyen | Energy efficient wireless sensor network and low power consumption station design for an urban water level monitoring system | |
| CN205545368U (en) | Mineral output detecting system based on GPRS radio communication | |
| CN202403736U (en) | Bridge structure health monitoring system based on ZigBee network | |
| CN208984011U (en) | Miniaturized RTK Beidou deformation monitoring system | |
| CN205029666U (en) | Electric power terminal communication expanding unit of carrier wave and wireless combination | |
| KR20110061191A (en) | Underground City Gas Facility Management System | |
| CN113464849A (en) | Ore pulp pipeline displacement fault detection system based on ZigBee and multi-hop routing | |
| CN202648641U (en) | Pipeline displacement detection system based on zigbee wireless communication | |
| CN209525474U (en) | A kind of power grid microclimate monitoring and early warning platform based on satellite remote sensing | |
| CN204677235U (en) | A kind of intelligent all downhole safety warning device | |
| CN209166334U (en) | Length based on ZigBee multi-hop technology is away from piping displacement detection system | |
| CN202661107U (en) | Vibration-temperature integrated type sensor for mines | |
| CN212645641U (en) | Photoelectric micro-displacement monitoring equipment based on finished oil pipeline site | |
| CN206035481U (en) | Water pressure monitoring system in pit drills in distributing type colliery based on zigBee | |
| CN214151976U (en) | System for realizing data wireless transmission for light measurement station | |
| CN211454374U (en) | Be applied to photovoltaic power plant unmanned aerial vehicle state monitoring module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211001 |
|
| RJ01 | Rejection of invention patent application after publication |