CN202898443U - Wireless blast furnace cooling water temperature difference on-line measuring system - Google Patents
Wireless blast furnace cooling water temperature difference on-line measuring system Download PDFInfo
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- CN202898443U CN202898443U CN 201220370612 CN201220370612U CN202898443U CN 202898443 U CN202898443 U CN 202898443U CN 201220370612 CN201220370612 CN 201220370612 CN 201220370612 U CN201220370612 U CN 201220370612U CN 202898443 U CN202898443 U CN 202898443U
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- 238000004891 communication Methods 0.000 claims description 14
- 238000012545 processing Methods 0.000 claims description 8
- 230000002087 whitening effect Effects 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 5
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Abstract
The utility model relates to a wireless blast furnace cooling water temperature difference on-line measuring system, comprising a network server, an industrial computer, a data converter, a receiving station, and a sending node, wherein the sending node sends the detected water temperature information to the receiving station; the receiving station sends the received temperature information to the industrial computer through the data converter; and the industrial computer is used to send the received temperature information to the network server. Compared with a wired water temperature measuring system, the all-digital wireless blast furnace cooling water temperature difference on-line measuring system provided by the utility model has the following advantages that each temperature measuring point of the system uses a digital temperature measuring chip and a wireless digital transmission mode, so cable restriction is eliminated, temperature measurement is more accurate, and transmission is simpler; and no cable for the connection with the outside is arranged, so the measuring points are more easily sealed to be more outstanding in a high-temperature, high-dust and moisture environment.
Description
Technical Field
The utility model belongs to the technical field of blast furnace water difference in temperature on-line monitoring technique and specifically relates to a wireless blast furnace cooling water difference in temperature on-line measuring system.
Background
The blast furnace is a sealed and large high-temperature reaction vessel. The change of corrosion or junction thickness in the furnace can be intuitively and rapidly reflected on the change of the heat flow intensity of the cooling water, and meanwhile, effective cooling and reasonable heat load are also the keys for realizing long service life and high efficiency of the blast furnace, so that the real-time collection of the water temperatures of different cooling water pipes is important for calculating and monitoring the heat flow intensity of a cooling system on line, and the method is an important basis for judging the corrosion and junction thickness conditions in the furnace and reasonably adjusting cooling parameters.
At present, the measurement of the water temperature difference of a cooling wall of a blast furnace is mainly divided into two types: single-point hand-held water temperature measurement and wired water temperature measurement systems. The single-point hand-held water temperature measurement only depends on manual timing measurement of a small amount of cooling wall water temperature difference of the furnace hearth, the detection force is small, the real-time performance is not achieved, the potential safety hazard of personnel exists, and the erosion change and the safety condition of the furnace hearth cannot be timely mastered. The wired water temperature measuring system mostly adopts a thermal resistor or a digital temperature chip. The measuring system adopting the thermal resistor generally needs wires with different lengths due to the special environment of the blast furnace, so different measuring points form different errors, and the wires are influenced by the environment and can influence the temperature measurement. Although the measurement system adopting the digital temperature chip eliminates the influence of the environment on temperature measurement, the complex environment of the blast furnace makes wiring difficult, the circuit is easy to be corroded by high temperature and water vapor, and the whole system is usually paralyzed due to single-point failure.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to prior art's not enough, provide a wireless blast furnace cooling water difference in temperature on-line measuring system, broken away from the restriction of cable for the temperature measurement is more accurate, and the transmission is more simple and convenient, and single temperature measurement point has fine interchangeability, can arrange wantonly, makes single temperature measurement point relatively independent, even break down, can not influence entire system's operation.
The utility model discloses mainly realize through following technical scheme: a wireless blast furnace cooling water temperature difference on-line measuring system comprises a network server, an industrial control computer, a data converter, a receiving station and a transmitting node; wherein,
the transmitting node sends the detected water temperature difference information to a receiving station;
the receiving station sends the received temperature information to the industrial control computer through the data converter;
and the industrial control computer is used for sending the received temperature information to the network server.
Preferably, the transmitting node performs whitening processing on the detected temperature information, and the receiving station performs anti-whitening processing on the received temperature information.
Preferably, the system adopts a mesh network topology structure mode, and the system uses the same frequency band or different frequency channels for communication.
Preferably, each transmitting node has a unique address identifier for marking the acquired address information of the temperature information, so as to detect the temperature information corresponding to each position in time.
Preferably, a plurality of receiving relay stations are arranged between the receiving station and the transmitting node;
and the receiving relay station is used for sending the received information to the receiving station.
Preferably, the receiving relay station is specifically configured to select a closest routing link from the received temperature information of the transmitting node corresponding to the located area to forward the temperature information to an upper level until the temperature information is transmitted to the total receiving station.
Preferably, when detecting that a certain routing link fails, the receiving relay station is further specifically configured to select a new routing path for transmission.
Preferably, the system transmits information by using a star topology structure, the system comprises a plurality of receiving stations, the plurality of stations correspond to transmitting nodes in a set area, the plurality of receiving stations are connected by an industrial bus, the system comprises a plurality of different frequency bands, and the frequency bands do not interfere with each other.
Preferably, each frequency band is composed of the receiving station and a plurality of the transmitting nodes, and each transmitting node has a unique address identifier corresponding to the frequency band; and the receiving station is used for receiving the temperature information of the transmitting node corresponding to the frequency band.
Preferably, the industrial control computer polls the plurality of receiving stations through the engineering bus at set time intervals.
The utility model has the advantages that: the utility model discloses a full-digital wireless blast furnace cooling water difference in temperature on-line measuring system compares with wired temperature measurement system, and every temperature measurement point of this system all adopts digital temperature measurement chip, wireless digital transmission mode, has broken away from the restriction of cable, and the temperature measurement is more accurate, and the transmission is more simple and convenient. The single temperature measuring point has good interchangeability and can be arranged at will, and the single temperature measuring point is relatively independent, so that the operation of the whole system cannot be influenced even if a fault occurs. Because no cable connected with the outside exists, the temperature measuring point is easier to seal, and the temperature measuring device has more advantages in high-temperature, high-dust and water vapor environments.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the system of the present invention;
fig. 2 is a schematic structural diagram of a second embodiment of the system of the present invention;
fig. 3 is a schematic structural diagram of the emitting point in the system of the present invention.
Description of the drawings:
1 is a network server, 2 is an industrial control computer, 3 is a data converter, 4 is a receiving station, 5 is a receiving relay station, and 6 is a transmitting node;
the device comprises a MCU (microprogrammed control unit) 12, a temperature acquisition module 13, a wireless transceiver module 14, a battery power detection module 15 and an industrial battery 16.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.
The utility model provides a wireless blast furnace cooling water difference in temperature on-line measuring system send-receiver process adopts high performance low-power consumption radio frequency chip to realize. The communication between the receiving (relaying) and transmitting modules is in a one-to-many manner, and generally one receiving (relaying) station collects temperature data of a plurality of transmitting nodes.
The whole system works in a 2.4G or 433M frequency band and adopts IEEE802.15.4/Zigbee or other low-power-consumption personal area network protocols. The system comprises a network server, an industrial control computer, a data converter, a plurality of receiving (relay) stations and a plurality of transmitting nodes.
In order to avoid mutual interference among single transmitting nodes, the system adopts a CSMA/CD (carrier sense multiple access/collision detection) communication mode. Therefore, the utilization efficiency of space resources is improved, and the reliability of communication is also improved.
The format of the data packet includes the following items: preamble, synchronization vocabulary, packet length, address bytes, payload, 2 byte CRC. The preamble and the synchronous word both adopt 32bits, and CRC is adopted to improve the accuracy of data.
The wireless signal adopts Q-QFSK or GFSK modulation method, and adopts FEC (forward error correction) data coding technology.
In addition, in order to ensure the integrity of data and the reliability of communication, the transmitting node performs whitening processing on the data, and the receiving node performs inverse whitening processing on the data.
The whole system is divided into two topological structures, namely a full wireless transmission mode and a wired and wireless combined mode.
The system adopts a mesh network topology structure in a full wireless transmission mode, and comprises a network server 1, an industrial personal computer 2, a data converter 3, a receiving station 4 and a transmitting node 6 as shown in figure 1; wherein, the transmitting node 6 sends the detected water temperature information to the receiving station 4; the receiving station 4 sends the received temperature information to the industrial control computer 2 through the data converter 3; the industrial control computer 2 is used for sending the received temperature information to the network server 1. The whole system works in the same frequency band or a plurality of frequency bands, and each transmitting node 6 has an address identification which is unique in the whole network. And a plurality of relay stations 5 are also arranged in the whole system, and when the relay stations 5 receive the temperature data of the transmitting node 6 in the area, the nearest routing link is selected to be forwarded to the upper-level route until the temperature data is transmitted to the receiving station 4. Generally, in order to ensure the stability of transmission, a certain redundancy is added to the whole network, and when a problem occurs in a certain routing link, a new routing path is selected for transmission. In this way, the arrangement of the transmitting nodes 6 is greatly facilitated.
In a wired and wireless combined transmission mode, a system adopts a star-shaped topological structure, as shown in fig. 2, wherein a plurality of receiving stations 4 connected with an industrial bus are added in the system mode shown in fig. 1, the whole system is composed of a plurality of different frequency bands, and the frequency bands do not interfere with each other. Each frequency band is composed of a receiving site 4 and a plurality of transmitting nodes 6, and each transmitting node 6 has an address identifier unique to the frequency band. The receiving station 4 is responsible for receiving data of the transmitting node 6 of the frequency band. The industrial control computer 2 polls a plurality of receiving stations 4 through an industrial bus at regular intervals. The receiving stations 4 to the central control room industrial control computer 2 are connected by a twisted pair line in a bus transmission mode and transmitted to the central control room industrial control computer 2.
As shown in fig. 3, the transmitting node comprises: the system comprises a micro control processor MCU12, a wireless transceiver module 14, a temperature measuring module 13, a battery power monitoring module 15 and an industrial battery 16. The industrial battery 16 is connected with the micro control processor MCU12, the micro control processor MCU12 is respectively connected with the temperature acquisition module 13, the wireless transceiver module 14 and the battery electric quantity detection module 15, the transmitting node is powered by the industrial battery 16, the non-working time is in the sleep mode of ultra-low power consumption at ordinary times, the transmitting node is awakened by a timer at intervals of set time according to needs, the water temperature is measured, the data is transmitted to a receiving station through the wireless transceiver module, and then the transmitting node enters the sleep mode again. The wireless transceiver module is mainly responsible for wireless communication with the receiving station. The temperature measuring module is matched with the imported high-precision temperature measuring chip to collect the water temperature in and out. The battery power detection module measures the power of the industrial battery which supplies power at regular time, and once the power is low, the battery is alarmed to prompt the replacement of the battery.
The utility model discloses implement on blast furnace stave cooling water system, all install the wireless blast furnace cooling water difference in temperature measuring device of full-digital in the exit of the cooling water of the furnace hearth, wind gap, furnace waist, furnace belly, the shaft of a furnace of blast furnace, divide into several regions with blast furnace from the top down simultaneously, receive (relay) website in every regional installation. Compared with the traditional wired water temperature measuring system, on a blast furnace needing to be provided with hundreds of thousands of temperature measuring devices, the wireless mode is undoubtedly much simpler and more convenient. A large number of cables are required to be arranged in the wired water temperature measuring system according to the position of a field temperature measuring point, and the temperature collector is required to be arranged near the temperature measuring point due to the limitation of the collection of the temperature points and the communication distance of the temperature collector. Thus, the system is very messy in a complex blast furnace environment and inconvenient to maintain. And often can lead to a collection website or even the whole system to be out of order because a temperature measuring device goes wrong.
The wireless mode just avoids the problems. Because the temperature measuring device is not limited by cables, the temperature measuring device can be randomly arranged, and a receiving (relay) station can be installed in a place which does not obstruct the field and is safe. Moreover, each temperature measuring device is relatively independent, and the worry that the whole system is possibly paralyzed when a single point of a bus system is in problem does not exist.
Therefore, in the complex environment of the blast furnace, the construction cost and the later maintenance cost can be greatly reduced by selecting wireless network transmission compared with a wired water temperature measuring system.
The wireless system adopts a highly integrated design, and all digital signals are transmitted from temperature acquisition to wireless transmission, so that the external interference is minimized, and the temperature measurement precision and transmission are guaranteed.
In order to avoid mutual interference between single transmitting nodes, the system adopts a communication mode of CSMA/CD (carrier sense multiple access/collision detection), wherein the CSMA/CD is a distributed medium access control protocol, and each node in the network can independently determine the transmission and the reception of data frames. Each node firstly carries out carrier monitoring before sending a data frame, and only when a medium is idle, the frame is allowed to be sent. At this time, if two or more nodes simultaneously monitor that the medium is idle and transmit a frame, a collision phenomenon occurs, and at this time, the transmitted frames all become invalid frames, and the transmission immediately declares failure. Each node must be able to detect whether a collision occurs at any time, and once a collision occurs, the transmission should be stopped so as to avoid the waste of medium bandwidth due to the transmission of invalid frames, and then the medium is contended again and the frames are retransmitted after a random delay time. The CSMA/CD can better utilize resources to detect whether the carrier wave with the same frequency exists in the air before data is transmitted for the communication mode. If the carrier waves with the same frequency exist in the air at the current time, data are not sent; if there is no same carrier in the air, indicating that the space resources are now unoccupied, data may be transmitted. Therefore, the utilization efficiency of space resources is improved, and the reliability of communication is also improved.
The wireless signal adopts GFSK modulation format and FEC (forward error correction) data coding technology. FEC refers to that a signal is processed in a certain format before being transmitted, and is decoded according to a predetermined algorithm at a receiving end to achieve the purpose of finding and correcting an error code. Due to the influence of collision and time-varying signals, data received through a real communication channel can often suffer burst errors, in order to increase the robustness of multiple bits generated by the errors, error detection in transmission is verified by a receiving party, and in an FEC mode, a receiving end not only can find errors, but also can determine the positions of errors of binary code elements, so that the errors can be corrected. FEC is used for the data portion and CRC vocabulary to reduce the overall bit error rate that occurs during operation at the sensitivity limit. Redundancy is added to the transmitted data so that the receiving end can store the original data in the event of errors in some bits.
In addition, in order to ensure the integrity of data and the reliability of communication, the transmitting node performs whitening processing on the data, and the receiving node performs inverse whitening processing on the data. The whitening process is mainly to avoid too long continuous 0 or 1 bit stream patterns during transmission. The baseband processor needs to determine whether the data is 0 or 1 from the received analog data signal, but an excessively long continuous 0 or 1 bit stream causes problems. Since no reference point exists in the received analog data signal, as in the direct current signal, a correction has to be made in dependence on the last few transmission signals received. Any continuous string of long-sequence bit streams of 0 or 1 may cause a correction failure. It is therefore desirable to scramble the signal using data whitening techniques to greatly reduce the likelihood of long sequence 0 or 1 bit stream bursts.
The output power of the wireless transceiver module is more than or equal to 10dBm, and the actual measurement effective open communication distance is more than 300 meters. Through tests, no dead point is arranged at any position of the blast furnace, and the wireless transceiving of the temperature acquisition system can be fully performed.
The utility model discloses a full-digital wireless blast furnace cooling water difference in temperature on-line measuring system compares with wired temperature measurement system, and every temperature measurement point of this system all adopts digital temperature measurement chip, wireless digital transmission mode, has broken away from the restriction of cable, and the temperature measurement is more accurate, and the transmission is more simple and convenient. The single temperature measuring point has good interchangeability and can be arranged at will, and the single temperature measuring point is relatively independent, so that the operation of the whole system cannot be influenced even if a fault occurs. Because no cable connected with the outside exists, the temperature measuring point is easier to seal, and the temperature measuring device has more advantages in high-temperature, high-dust and water vapor environments.
The invention has been described in detail, but it will be apparent that modifications and adaptations can be made by those skilled in the art without departing from the scope of the invention as defined in the appended claims.
Claims (10)
1. A wireless blast furnace cooling water temperature difference on-line measuring system is characterized by comprising a network server, an industrial control computer, a data converter, a receiving station and a transmitting node; wherein,
the transmitting node sends the detected water temperature information to a receiving site;
the receiving station sends the received temperature information to the industrial control computer through the data converter;
and the industrial control computer is used for sending the received temperature information to the network server.
2. The wireless blast furnace cooling water temperature difference on-line measuring system of claim 1, wherein the transmitting node performs whitening processing on the detected temperature information, and the receiving station performs anti-whitening processing on the received temperature information.
3. The system of claim 1, wherein the system adopts a mesh network topology, and the system uses the same frequency band or different frequency channels for communication.
4. The wireless blast furnace cooling water temperature difference online measurement system according to claim 2, wherein each transmitting node has a unique address identifier for marking the acquired address information of the temperature information so as to detect the temperature information corresponding to each position in time.
5. The wireless blast furnace cooling water temperature difference on-line measuring system according to claim 1, wherein a plurality of receiving relay stations are provided between the receiving station and the transmitting node;
and the receiving relay station is used for sending the received information to the receiving station.
6. The system of claim 5, wherein the receiving relay station is specifically configured to select a nearest routing link from the received temperature information of the transmitting node corresponding to the located area to forward the temperature information to an upper level until the temperature information is transmitted to the total receiving station.
7. The system according to claim 5, wherein the receiving relay station is further configured to select a new routing path for transmission when a failure of a routing link is detected.
8. The system of claim 1, wherein the system transmits information by using a star topology structure, the system comprises a plurality of receiving stations, the plurality of stations correspond to transmitting nodes in a set area, the plurality of receiving stations are connected by an industrial bus, the system comprises a plurality of different frequency bands, and the frequency bands do not interfere with each other.
9. The system of claim 8, wherein each frequency band is composed of the receiving station and a plurality of transmitting nodes, and each transmitting node has a unique address identifier corresponding to the frequency band; and the receiving station is used for receiving the temperature information of the transmitting node corresponding to the frequency band.
10. The system of claim 8, wherein the industrial control computer polls a plurality of receiving stations through an engineering bus at a set time interval.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220370612 CN202898443U (en) | 2012-07-30 | 2012-07-30 | Wireless blast furnace cooling water temperature difference on-line measuring system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220370612 CN202898443U (en) | 2012-07-30 | 2012-07-30 | Wireless blast furnace cooling water temperature difference on-line measuring system |
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| CN202898443U true CN202898443U (en) | 2013-04-24 |
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| CN 201220370612 Expired - Lifetime CN202898443U (en) | 2012-07-30 | 2012-07-30 | Wireless blast furnace cooling water temperature difference on-line measuring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102851424A (en) * | 2012-07-30 | 2013-01-02 | 北京北科亿力科技有限公司 | Online cooling water temperature difference measuring system for wireless blast furnace |
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- 2012-07-30 CN CN 201220370612 patent/CN202898443U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102851424A (en) * | 2012-07-30 | 2013-01-02 | 北京北科亿力科技有限公司 | Online cooling water temperature difference measuring system for wireless blast furnace |
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