CN103019183A - Remote wireless monitoring method for thickener - Google Patents
Remote wireless monitoring method for thickener Download PDFInfo
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- CN103019183A CN103019183A CN2012104778319A CN201210477831A CN103019183A CN 103019183 A CN103019183 A CN 103019183A CN 2012104778319 A CN2012104778319 A CN 2012104778319A CN 201210477831 A CN201210477831 A CN 201210477831A CN 103019183 A CN103019183 A CN 103019183A
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- concentrator
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- radio station
- thickener
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The invention discloses a remote wireless monitoring method for a thickener. The method is applied to that a DCS (distributed control system) system or a PLC (programmable logic controller) system performs remote wireless monitoring on the thickener. The wireless monitoring method comprises the following steps of: erecting an outdoor antenna and installing a feed line nearby a remote controller and a thickener controller at first; then respectively installing data transfer radios on the thickener controller and the remote controller; connecting the data transfer radios and the antenna via the feed line, and setting parameters of the data transfer radios; and according to different communication interfaces and different communication protocols of the remote controller, finally setting interface parameters on a DCS controller or a PLC, the data transfer radios and the thickener controller, and writing programs and setting communication areas in the controllers to enable the DCS controller or the PLC controller to perform data exchange with one or more thickener controllers, thus realizing the remote monitoring on the thickener. Via the remote wireless monitoring method for the thickener, disclosed by the invention, the problem of remote monitoring on the thickener in the case that the wiring can not be realized is solved.
Description
Technical field
The present invention is applied to DCS or PLC system to the remote wireless monitoring of concentrator.
Background technology
Concentrator is widely used in Mineral Processing Industry as the major equipment of concentrated ore pulp.Concentrator purpose in process of production is the ore pulp that certified concentration is provided to rear operation, guarantees that mineral slurry flux satisfies Production requirement.Because its complex process, severe operational environment, add from the supplied materials change of properties of higher level's technique frequent, therefore for equipment is carried out valid function, the raising craft precision, on medium-and-large-sized concentrator, automatic control system replaces the control mode that the on-site manual operation becomes main flow gradually.Automatic control system is applied to not only improve in the concentrator operational characteristic of system, and can become the part of PCS layer (process control station) in the CIMS in Enterprise, be convenient to the operation of concentration of enterprises supervision and operating equipment, more the important process information access MES layer (manufacturing execution system layer) in the concentrator or ERP layer (Enterprise Resources Plan layer) can be carried out unified management.Yet because structure and the working method of concentrator uniqueness, particularly for the concentrator of peripheral-traction structure, the equipment Local Controller often is installed on the walking crane span structure, although this setup is convenient equipment on the crane span structure is directly controlled, but because crane span structure can clockwise rotate take the concentrator center as axle, make that direct wiring is connected very difficult between concentrator and remote control equipment when concentrator moves.Receive the run action of concentrator status information and control concentrator in order to satisfy remote equipment, therefore need a kind of novel control mode, thus the demand of industrial production of the concentrator big data quantity control that solution traditional wiring mode can't satisfy.
Summary of the invention
The object of the present invention is to provide a kind of remote wireless monitoring method to concentrator.
The present invention makes remote controllers (DCS or PLC controller) obtain the information in the concentrator controller by the mode of radio communication, can control and monitor at remote location the running status of concentrator thereby make to need not between remote controllers and concentrator controller to connect up.
Described wireless monitoring method performing step is as follows:
Step 1, near remote controllers and concentrator controller, set up exterior aerial, feeder line is installed.
Described remote controllers are positioned at long-distance control cabinet, and described concentrator controller is positioned at the concentrator on-site control.Step 2, at concentrator controller and remote controllers data radio station is installed respectively, is connected by data line between described data radio station and the concentrator controller, be connected by data line between data radio station and the remote controllers.Select data radio station with same-interface form according to the system controller of practical application.Data radio station is connected with the concentrator controller with remote controllers respectively.
Described data radio station refers to the high-performance expert data transmission radio station in conjunction with digital processing technology and radiotelegraphy realization.Be characterized in adopting digital signal processing, digital modulation and demodulation, has the multiple interfaces mode, such as serial line interface or Ethernet interface, select the communication interface mode of which kind of form to be determined by the communication protocol that equipment adopted of being communicated by letter, and wireless digital broadcasting station is transparent for communication protocol.
Step 3, data radio station is connected with antenna through feeder line, the data radio station parameter is set.
Step 4, according to the different communication interface of remote controllers (DCS and PLC), different communication protocol, at DCS controller or PLC controller, data radio station, concentrator controller interface parameters is set, and coding arranges communication zone in controller, make DCS controller or PLC controller can and one or more concentrator controller between carry out exchanges data, realize the remote monitoring to concentrator.
Described DCS refers to distributed control system or Distributed Control System (DCS), Distributed Control Systems.
Described PLC refers to programmable logic controller (PLC), Programmable Logic Controller.
The invention has the advantages that:
The invention solves in the situation that can't connect up the remote monitoring problem of concentrator.
Description of drawings
Fig. 1 is the process flow diagram of the remote wireless monitoring method of concentrator provided by the invention;
Fig. 2 equipment connection schematic diagram;
Fig. 3 antenna height calculates schematic diagram;
Many concentrators of Fig. 4 remote control network schematic diagram.
Embodiment
Below in conjunction with accompanying drawing concentrator wireless monitoring method provided by the invention is elaborated.
The remote wireless monitoring method performing step flow process of described concentrator specifically comprises the steps: as shown in Figure 1
1, equipment is connected such as Fig. 2, at first need the installation room outside antenna, the height that palpus counting chamber outside antenna needs before installing.Because China radio control department has marked two frequency ranges specially as the special-purpose frequency range of wireless data sending, be respectively two frequency ranges of 230MHz and 860MHz (at present China's overwhelming majority data radio station products all are distributed in the 230MHz frequency range), namely be operated in VHF(very high frequency(VHF)) and the UHF(superfrequency) ultrashort wave frequency band on.Ultrashort wave (USW) mainly is the transmission of doing than short distance; different with high frequency (HF) is; its signal can not reflected usually in ionosphere; the radio wave propagation of ultrashort wave frequency band is by carrying out in the air; and usually can be subjected to environmental factor (blocking such as landform) to affect its signal, so the antenna height of antenna is the key that determines communication distance.
The antenna height of how to confirm antenna is by the visual range decision of communication point-to-point transmission.The relation of visual range and antenna height such as Fig. 3, because the impact of earth curvature, select maximum visual distance D kilometer between (antenna height is respectively H rice and h rice) for two of remote controllers antenna installation position and place, concentrator controller antenna installation position, its computing formula is as follows:
Described maximum visual distance refers to the ultimate range that mutually can see.
Fix antenna by calculating gained maximum visual distance, one of feeder line is connected on the antenna and with the other end causes indoor switch board.
If need to monitor a plurality of concentrators, such as Fig. 4, remote controllers must be selected omnidirectional antenna as main website, and the concentrator controller can be selected orientation or omnidirectional antenna as slave station.
Therefore 2, the hardware data kind of interface of communicating by letter of remote controllers and concentrator controller mainly contains serial communication interface and Ethernet interface, and number turns the radio station and also should select the product that corresponding interface is provided.If the use serial communication interface directly is connected data line to connect with remote controllers the data radio station serial line interface and is got final product with concentrator controller serial line interface; If the use Ethernet interface, available Ethernet switch is connected with remote controllers data radio station with the concentrator controller.For making things convenient for the setting of messaging parameter, the suggestion remote controllers are selected identical communication interface type with the concentrator controller, thereby use identical method of attachment.If can't use identical communication interface, the interface type that then can use interface convertor to convert a certain needs to communicates.
Data radio station preferably is installed in the concentrator on-site control of the long-distance control cabinet of remote controllers and concentrator controller, so both convenient be connected with the concentrator controller to be connected with remote controllers also be convenient to from described long-distance control cabinet and concentrator on-site control, draw Power supply.
3, data radio station is connected with feeder, suggestion is installed lightning protection additional between feeder and data radio station, thus the work safety of protection data radio station equipment under thunderstorm weather.
The arrange software supporting by data radio station arranges and debugs the data radio station parameter, the parameter that need to arrange comprise with remote controllers and concentrator controller between data-interface parameter and the wireless communication parameters of communicating by letter.
The setting of a/ data-interface parameter:
If the use serial communication interface, parameter will with remote controllers and consistent the getting final product of concentrator controller serial line interface parameter; If the use Ethernet interface needs by ethernet rule mask and distributing IP address on demand to be set.
The setting of b/ wireless communication parameters:
By the radio relevant laws and regulations station radio communication frequency is set, and setting wireless data dissemination speed as required, for guaranteeing the quality of communication, generally wireless signal transmission power is made as maximal value.
After setting wireless communication parameters, we also need whether to satisfy application requirements according to radio station debugging software monitoring wireless communication parameters.The below describes several important parameters:
Received field strength Pr also claims received signal strength RSSI (Received Signal Strength Indicator), in radio communication, signal of communication is aloft propagated with electromagnetic form, it is excited by alternating electric field at a high speed, and electric wave sends from the radio station, through feeder line and antenna, by in the air in the communication process of a distant place signal decayed, field intensity is different during to remote receiver, and the signal to noise ratio (S/N ratio) of demodulated output signal also can be different, thereby the judgement that affects system causes error code.If field intensity is too little, though distance nearlyer receiver also can not receive signal.So received field strength is another key factor that determines communication distance.Received field strength Pr can represent with following formula:
Pr＝Pt+Gt+Gr－Lt－Lr－Lo
Pr: normal incoming level (dBm)
Pt: the power of posting a letter (dBm)
Gt, Gr: dual-mode antenna gain (dBm)
Lt, Lr: transmitting-receiving feeder loss (dBm)
Lo: free space loss (dBm),
Lo＝32.45+20lgf(MHz)+20lgD(Km)
Its threshold level is also different according to the requirement of its value of difference of environment for use: the city 〉-90dBm, suburb 〉-100dBm, field 〉-110dBm, if less than this value, need to strengthen antenna gain or increasing transmitting terminal radio station power or increase antenna height etc. according to actual conditions.Received field strength Pr and its threshold level level difference are apart from larger, and fading margin is more, and antijamming capability is stronger, and error code is fewer, and the General Requirements fading margin is more than 20dB.
Signal to noise ratio snr (Signal-to-noise ratio), its value is greater than 20dB, if illustrate that received signal quality is poor or electric wave, electrical Interference are arranged less than this value.
Transmission frequency and receive frequency, this application is selected the 220-240MHz radio station, and lower frequency can make it have certain diffracting power.Transmitting-receiving frequency between the radio station must be mutually corresponding, and transmitting-receiving frequency is set as required, and the transmitting-receiving frequency change surpasses ± 2MHz.
The power P of posting a letter t is determined by selected data radio station performance index, and the general data radio station maximum of the using power of posting a letter is namely 5 watts of 37dBm, and minimum for 20dBm is 100 milliwatts, generalized case is set to maximal value with emissive power and gets final product.Can whether consistent with setting value by the software test actual emission power, if inconsistent, illustrate that radio station and antenna, feeder line do not mate, need to check the cable connection state.
Error rate BER (bit error ratio) is observed Bit Error Ratio Measurement after the parameter setting is finished, guarantee that BER is less than 10E-6.
4, the data-interface parameter of remote controllers and concentrator controller arranged, what the electric type of interface was common is serial ports or Ethernet interface.For serial ports baud rate, parity checking, position of rest are set mainly, corresponding parameter is consistent gets final product in its value and the data radio station; For Ethernet interface, by ethernet rule subnet mask is set, and will needs accordingly the IP address of communication value equipment to be arranged on the same network segment to get final product.
After setting parameter according to the electric type of communication interface, also need the communication protocol explanation according to selected remote controllers or concentrator controller, set correlation parameter according to its rule of communication, such as master slave mode and station address etc.Because the kind of communication protocol is relatively many, the communication protocol that the different brands controller adopts is often also different.If the data communication of striding between agreement also needs to use third-party protocol conversion product, this type of product price is higher and increased the trouble spot of system, and therefore suggestion is in the situation that conditions permit, the as far as possible identical or same brand product of selection protocol.
5, according to selected remote controllers, the corresponding communication instruction that uses opertaing device to provide is finished remote controllers to the read-write operation of concentrator controller data, then reaches the purpose of remote monitoring concentrator by reading and writing data of remote controllers of monitoring.
Claims (7)
1. concentrator remote wireless monitoring method is characterized in that:
Step 1, near remote controllers and concentrator controller, set up exterior aerial, feeder line is installed;
Step 2, at concentrator controller and remote controllers data radio station is installed respectively, is connected by data line between described data radio station and the concentrator controller, be connected by data line between data radio station and the remote controllers;
Step 3, data radio station is connected with antenna through feeder line, the data radio station parameter is set;
Step 4, at remote controllers, data radio station, concentrator controller interface parameters is set, and coding arranges communication zone in controller, make remote controllers can and one or more concentrator controller between carry out exchanges data, realize the remote monitoring to concentrator.
2. concentrator remote wireless monitoring method according to claim 1, it is characterized in that: described remote controllers are positioned at long-distance control cabinet, and described concentrator controller is positioned at the concentrator on-site control.
3. concentrator remote wireless monitoring method according to claim 1, it is characterized in that: described remote controllers, concentrator controller have the interface shape identical with data radio station, or are convertible into identical interface shape.
4. concentrator remote wireless monitoring method according to claim 1, it is characterized in that: described remote controllers are DCS controller or PLC controller.
5. concentrator remote wireless monitoring method according to claim 1 is characterized in that: maximum visual distance D kilometer between two points at remote controllers antenna installation position and place, concentrator controller antenna installation position, and its computing formula is as follows:
Wherein, antenna height is respectively H rice and h rice.
6. concentrator remote wireless monitoring method according to claim 1 is characterized in that: install lightning protection additional between described data radio station and feeder.
7. concentrator remote wireless monitoring method according to claim 1, it is characterized in that: described data radio station parameter comprises data-interface parameter and wireless communication parameters.
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| CN2012104778319A CN103019183A (en) | 2012-11-22 | 2012-11-22 | Remote wireless monitoring method for thickener |
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| CN2012104778319A CN103019183A (en) | 2012-11-22 | 2012-11-22 | Remote wireless monitoring method for thickener |
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| CN103019183A true CN103019183A (en) | 2013-04-03 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108152835A (en) * | 2016-12-02 | 2018-06-12 | 上海华测导航技术股份有限公司 | Test method based on data radio station transmission range built in GNSS receiver |
| CN112445136A (en) * | 2020-12-16 | 2021-03-05 | 北京科技大学 | Thickener prediction control method and system based on continuous time neural network |
Citations (3)
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| US5963444A (en) * | 1996-09-18 | 1999-10-05 | Mitsubishi Denki Kabushiki Kaisha | Control apparatus having remote PLC device and control method for same |
| CN2580497Y (en) * | 2002-07-25 | 2003-10-15 | 北京安控科技发展有限公司 | Remote distance terminal controller for water source well |
| CN1832612A (en) * | 2005-03-09 | 2006-09-13 | 华为技术有限公司 | Method for implementing network planning of open field |
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2012
- 2012-11-22 CN CN2012104778319A patent/CN103019183A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5963444A (en) * | 1996-09-18 | 1999-10-05 | Mitsubishi Denki Kabushiki Kaisha | Control apparatus having remote PLC device and control method for same |
| CN2580497Y (en) * | 2002-07-25 | 2003-10-15 | 北京安控科技发展有限公司 | Remote distance terminal controller for water source well |
| CN1832612A (en) * | 2005-03-09 | 2006-09-13 | 华为技术有限公司 | Method for implementing network planning of open field |
Non-Patent Citations (3)
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| 刘子玉等: "一种基于无线数传电台通讯的远程监控系统", 《工业控制计算机》, vol. 19, no. 2, 28 February 2006 (2006-02-28), pages 32 - 33 * |
| 安军强: "基于PLC、数传电台和工控机的无线监控系统", 《自动化博览》, vol. 23, no. 3, 30 June 2006 (2006-06-30), pages 76 - 77 * |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108152835A (en) * | 2016-12-02 | 2018-06-12 | 上海华测导航技术股份有限公司 | Test method based on data radio station transmission range built in GNSS receiver |
| CN112445136A (en) * | 2020-12-16 | 2021-03-05 | 北京科技大学 | Thickener prediction control method and system based on continuous time neural network |
| CN112445136B (en) * | 2020-12-16 | 2022-02-22 | 北京科技大学 | Thickener prediction control method and system based on continuous time neural network |
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Application publication date: 20130403 |