CN101614597B - Monitoring device used for high voltage cable connector status in mine roadway - Google Patents

Monitoring device used for high voltage cable connector status in mine roadway Download PDF

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Publication number
CN101614597B
CN101614597B CN2009100749781A CN200910074978A CN101614597B CN 101614597 B CN101614597 B CN 101614597B CN 2009100749781 A CN2009100749781 A CN 2009100749781A CN 200910074978 A CN200910074978 A CN 200910074978A CN 101614597 B CN101614597 B CN 101614597B
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unit
microcontroller
data
temperature
monitoring
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CN2009100749781A
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CN101614597A (en
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宋建成
齐建伟
郑丽君
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太原理工大学
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Abstract

The invention provides a monitoring device which is used for the high voltage cable connector status in a mine roadway, wherein, a temperature sensor, a humidity sensor and a current transformer are connected with a data acquisition unit through signal wires; the data acquisition unit, a data storage unit, a keyboard, a display unit, a clock unit and an acousto-optic warning unit are connected with a microcontroller unit through an I/O port; and the microcontroller unit is formed by the connection between a serial port and a communication unit. The invention is simple in structure, low in cost, safe and reliable in performance, and can monitor the temperature, current and humidity of the cable connector in real time, thus being applicable to the monitoring of high pressure cable connection device in the mine roadway and other high voltage electric power equipment.

Description

A kind of monitoring device that is used for high voltage cable connector status in mine roadway
Technical field
The present invention relates to a kind of monitoring device of high voltage cable connector status, comprise a kind of monitoring system that is used for high voltage cable connector status in mine roadway of temperature sensor, Temperature Humidity Sensor, current transformer, micro controller unit, data acquisition unit, data storage cell, keyboard and display unit, acousto-optic warning unit and communication unit.
Technical background
Mine laneway constantly extends because of cutting coal, the reach of the heading equipment that high-tension cable cuts coal with the tunnel and constantly extending forward, and the joint that the tunnel is used to connect high-tension cable more under the deep-well is many more.In electrical network, the electrical network of voltage below 1KV is low voltage electric network, is high-voltage fence at 3~330KV.Generally speaking, under coal mine, just need a high-voltage cable joint every 300~500 meters in the high-voltage fence.Because under the coal mine, the spark that high-voltage cable joint produces causes gas or coal dust explosion easily, so the connection of high-voltage cable joint must be adopted the mine explosion-suppression termination that meets the mine safety standard.The mine explosion-suppression termination is a kind of device that the mine high-voltage cable joint connects that is specifically designed to.This device is that a end by high-voltage cable joint is with after an end of another high-tension cable is connected, be fixed on the insulator foot, adopt O-ring seal and explosion-resistant enclosure that high-voltage cable joint and external environment are isolated fully, to satisfy tunnel the move forward demand of safety utilization of electric power of heading equipment that cuts coal.Under the running status of the high voltage of mine laneway coal mining heading equipment, big electric current, the connection of high-voltage cable joint directly influences continuity, reliability and the security of pit mining power supply.The reliability of mine laneway high-voltage cable joint is relevant with the temperature rise of cable splice, electric current and humidity, relevant with the crimp quality of mine laneway cable splice, the factors such as tension force and overload degree of bearing, these factors all may make the cable splice worsening condition, contact resistance increases, cause that contact temperature raises, the oxidation of aggravation surface in contact, thereby cause the loosening place of local melting welding or contact to produce arc discharge, cause the generation of major accidents such as cable splice fault even blast, also lack effective monitoring device at present at the mine laneway high-voltage cable joint.
Existing high voltage cable connector status in mine roadway monitoring mainly is by artificial employing temperature Instrument regular visit, by manual detection problems such as inaccurate, omission and monitoring time be long often appear detecting like this, and time-consuming, effort, poor reliability, Monitoring Data is single and can not store automatically and analyze, can not on-line monitoring and automatic management.
The existing bibliographical information relevant with the high voltage cable connector status in mine roadway monitoring device have North China Electric Power University to appoint swallow and doctor Liang Ming to be published in " electrical applications " 2005 the 12nd phases to be entitled as " mine high voltage power transmission temperature of cable junction cruising inspection system ", this system only can simply monitor the temperature of cable splice, regularly collect data, then the data upload of gathering is handled to host computer by temperature polling instrument.This monitoring device can not show and upload data in real time, is in time to send alerting signal in the fault burst.Appointing intelligent and doctor Sun Jiping to be published in " coal science and technology " 2006 the 12nd phases in China Mining University is entitled as in " research of mine cable on-line temperature monitoring method " literary composition, has proposed a kind of on-line monitoring method that adopts microprocessing and bus type digital temperature sensing technology to combine.This method also is the temperature of Monitoring High Voltage Cable joint only, there are not monitoring current and humidity, can not reflect electric current and variation of temperature trend in real time, and can not monitor the humidity of mine flameproof high-voltage cable termination, judge the quality of the sealing of termination, thereby can not comprehensively grasp the status information that fault takes place.
Therefore, want to solve long-term, stable, the safe electrical problem of heading equipment that mine laneway cuts coal, press for a kind of simple in structure, reliability is high, convenient wiring distributed networked monitoring device, and can formerly monitor the tunnel variation of heading equipment that cut coal in real time with temperature, electric current and the humidity of high-tension cable, understand the transmission of electricity state of high-voltage cable joint in real time, in time find the fault of high-voltage cable joint, give warning in advance, the accident that prevents enlarges, and avoids mine disaster to take place.
Summary of the invention
The invention provides a kind of monitoring device that is used for high voltage cable connector status in mine roadway, with the variable condition on-line monitoring problem of the temperature, electric current and the humidity that solve the mine laneway high-voltage cable joint.
The technical solution used in the present invention comprises temperature sensor, Temperature Humidity Sensor, current transformer, micro controller unit, data acquisition unit, data storage cell, keyboard and display unit, clock unit, acousto-optic warning unit and communication unit.Its formation is: temperature sensor, Temperature Humidity Sensor, current transformer are to be connected with data acquisition unit by signal wire, data acquisition unit, data storage cell, keyboard, display unit, clock unit and acousto-optic warning unit are to be connected with micro controller unit by the I/O mouth, micro controller unit is to be connected with communication unit by serial ports to be used for the monitoring device of high voltage cable connector status in mine roadway, monitors temperature, electric current and the humidity of cable splice in real time;
Described micro controller unit is that crystal oscillator (X1/X2) is connected with the crystal oscillator pin I/O interface of microcontroller (U0), reset button (S1) is connected with the reset pin I/O of microcontroller (U0), and debugging interface (U1) is connected with the corresponding I/O interface of microcontroller (U0).
Described data acquisition unit is divided into current acquisition unit, temperature collecting cell and ambient humidity collecting unit.Signal conditioning circuit one side that the current acquisition unit is made up of operational amplifier (U5/U6/U7/U8/U9/U10) is connected with current transformer (U2/U3/U4), and opposite side is connected with the A/D conversion I/O of microcontroller.
Described temperature data samwpling unit is that the data line of temperature sensor (U11/U12/U13) is connected with microcontroller I/O.
Described humiture data acquisition unit is that the clock line of Temperature Humidity Sensor (U14) is connected with microcontroller I/O with data line.
Described data storage cell is that the data line of EEPROM (U15) is connected with microcontroller I/O with clock line.
Described keyboard unit is that 3 * 3 keyboards are connected with the I/O that microcontroller has interrupt function.
Described display unit is that the 8 bit parallel data lines and the control line of display (U16) is connected with microcontroller I/O.
Described acousto-optic warning unit is that triode (Q1/Q2) side is connected with luminotron (LED), loudspeaker (LS).Opposite side is connected with microcontroller I/O interface.
Described clock unit comprises that mainly the crystal oscillator pin of clock chip (U17) is connected with crystal oscillator (X1), and power lead is connected with standby power supply (B1) with system power supply VCC, and data line is connected with microcontroller I/O interface with clock line.
Described communication unit is that photoelectric isolating device (U19/U20/U21) side is connected with RS-485 bus driver (U22), and opposite side is connected with the serial ports of microcontroller MCU.Photoelectric isolating device is connected with system insulating power supply (U18) with RS-485 bus driver power lead.
Described microcontroller has solidified temperature, electric current and humidity detection program, comprises initialize routine, A/D conversion routine, data processing subroutine, clock subroutine, sound and light alarm subroutine, keyboard and display subroutine and communication program.
Above-mentioned a kind of advantage that monitoring device had and the good effect that is used for high voltage cable connector status in mine roadway of the invention process is: monitoring device employing digital temperature sensor, digital hygro sensor summation current transformer detect the state of mine laneway high-voltage cable joint, have solved the problem of mine high-voltage cable joint on-line monitoring.Adopt photoelectric isolation technology, reduced the problem of down-hole high pressure high-intensity magnetic field greatly the interference and the influence of monitoring device communication unit.Adopting integrated circuit (IC) chip, make monitoring device simple in structure, with low cost, safe and reliable, and increased historical storage, time keeping function, is a kind of real time on-line monitoring device.
Compare with existing cable temperature monitoring device, this device has increased current acquisition unit and humidity collecting unit, and the current monitoring unit can be understood connector temperature in real time and change whether exceed normal range with electric current; The humidity detection unit can be understood the interior humidity of mine explosion-suppression high-tension cable termination that is used to connect high-voltage cable joint at any time, has guaranteed the sealing of mine explosion-suppression high-tension cable termination.This device has been realized mine high-voltage cable joint temperature by adopting the microcontroller technology, the continuous on-line monitoring of electric current and ambient humidity, it is untimely to have solved the data acquisition that relies on manual inspection over a long period of time and cause, inaccurate and the problem of not having on-the-spot early warning of criterion, the manual inspection of having avoided, reduced work of maintenance personnel intensity, improved the intelligent degree of operational management, accelerated the information feedback of equipment running status, shortened the time of fault judgement and processing, improved the reliability of mine laneway high-voltage cable joint to Operation of Electric Systems, reduced because of the economic loss that cable splice has a power failure and blast causes, avoided the generation of mine disaster.
Not only hardware configuration is simple for this mine laneway high-voltage cable joint monitoring device, cost is lower, easy for installation, antijamming capability is strong, and system detects accurately reliable and stablely, is applicable to that mine laneway cuts coal heading equipment with the on-line monitoring of high-voltage cable joint and the on-line monitoring of other high-voltage cable joint.
Description of drawings
Fig. 1 is a system architecture diagram of the present invention;
Fig. 2 is micro controller unit circuit theory diagrams of the present invention;
Fig. 3 is data acquisition unit circuit theory diagrams of the present invention;
Fig. 4 is data storage cell circuit theory diagrams of the present invention;
Fig. 5 is keyboard unit circuit theory diagrams of the present invention;
Fig. 6 is a display unit circuit schematic diagram of the present invention;
Fig. 7 is clock unit circuit theory diagrams of the present invention;
Fig. 8 acousto-optic warning unit circuit theory diagrams;
Fig. 9 is communication unit circuit theory diagrams of the present invention.
Embodiment
Below by embodiment a kind of monitoring device that is used for high voltage cable connector status in mine roadway that the present invention proposes is described in further detail, the those of ordinary skill of affiliated specialty is after having read present embodiment, can understand and implement the present invention, equally, this specific embodiment also can bring aforesaid advantage and good effect, realizes purpose of the present invention.
Specific embodiment 1
As Fig. 1, be used for that monitoring device is to be made of temperature sensor, Temperature Humidity Sensor, current transformer, micro controller unit, data acquisition unit, data storage cell, keyboard and display unit, clock unit, acousto-optic warning unit and communication unit at the bottom of the high voltage cable connector status in mine roadway.Current transformer measures each phase current signal of termination inner cable, temperature sensor measures the temperature signal of termination inner cable junction, Temperature Humidity Sensor measures ambient humidity signal in the termination, other each element circuit combines in and finishes corresponding functions of modules on the circuit board, temperature sensor wherein, Temperature Humidity Sensor, current transformer, link to each other with data acquisition unit on the circuit board by signal transmssion line, data acquisition unit, data storage cell, keyboard, display unit, clock unit, with acousto-optic warning unit is to be connected with micro controller unit by the I/O mouth, and micro controller unit is to be connected with communication unit by serial ports.Micro controller unit is the core of this device, by signal bus temperature sensor, Temperature Humidity Sensor, current transformer are sampled, and data analysis processing to gathering, carry out analysis and judgement according to the result who handles, when finding the trouble spot is arranged, carry out sound and light alarm, and check, keep in repair; Simultaneously the data of gathering are sent to host computer by order wire, the host computer management system is analyzed, handles, is filed data.
As Fig. 2, described micro controller unit: mainly the signal with the data acquisition unit collection carries out data processing, obtains the needed information of other element circuit.Microcontroller (U0) has adopted 16 low-power scm chips of high-performance of TI company, adopts two kinds of different crystal oscillators, can adopt button (S1) to realize the reset function of monitoring system in different crystal oscillator (X1/X2) work down.
As Fig. 3, described data acquisition unit: mainly be the collection that realizes current signal, temperature signal and moisture signal.Current signals adopts the method for AC sampling, and the current signal in the one-period is gathered 128 points, handles by microcontroller then, calculates the effective value of current signal.Selection of temperature signal adopts the digital temperature sensor of unibus, temperature signal is directly changed into serial digital signal handles for micro controller unit.The digital temperature sensor of two-wire system bus is adopted in the collection of moisture signal, moisture signal is directly changed into digital signal handles for micro controller unit.The current acquisition unit with current transformer (U2/U3/U4) gather simulating signal by the signal conditioning circuit formed by operational amplifier components and parts such as (U5/U6/U7/U8/U9/U10) processing and convert the signal that microcontroller can directly read to.Wherein the A/D modular converter is 12 A/D modular converters that microcontroller carries, and three tunnel conditioning back simulating signals link to each other with microcontroller P6.0, P6.1, P6.2 respectively.Temperature data samwpling unit mainly is to realize that by digital temperature sensor (U11/U12/U13) clock line of digital temperature sensor links to each other with P2.2 with P2.0, the P2.1 of microcontroller respectively with data line to selection of temperature signal.The humidity data collecting unit mainly is to realize the collection of ambient humidity, the clock line of digital hygro sensor are linked to each other with P2.3, the P2.4 of microcontroller respectively with data line by digital hygro sensor (U14).
As Fig. 4, described data storage cell: mainly be electric current, the temperature and humidity data of monitoring to be stored on time, be convenient to the analysis of historical data and consult.Data storage cell has been expanded 512K capacity EEPROM (U15).I is adopted in the storage of EEPROM data 2The C mode bus, address wire A0, A1, A2 ground connection, the EEPROM clock line links to each other with microcontroller P3.6, P3.7 respectively with data line.
As Fig. 5, described keyboard: mainly be the setting that realizes early-warning parameters by button.Keyboard Designing is 3 * 3 nine keys, and keyboard links to each other with the I/O that microcontroller has interrupt function.Three temperature by the key control three-phase, two buttons are used to control clock demonstration and environment temperature demonstration, and two buttons are used to move to left and the right-cursor key, and two buttons are used for confirming (preservation) and ESC Escape.
As Fig. 6, described display unit: mainly monitored data information is carried out the scene and show.In the unit, data bus links to each other with microcontroller P4 mouth, control line and microcontroller P3.0, P3.1, P3.2.LCD (U16) liquid crystal display is four lines eight row, the first row demonstration time, and the second row display environment temperature and humidity, the third line shows each phase temperature of cable junction value in turn, fourth line shows each phase current values in turn.
As Fig. 7, described acousto-optic warning unit: mainly be when current signal, temperature signal and moisture signal surpass the value of setting in advance, realize sound and light alarm, remind the staff to have fault to take place.Microcontroller is controlled triode (Q1/Q2) by P6.7, thereby luminotron (LED) and loudspeaker (LS) are controlled, and realizes warning function.
As Fig. 8, described clock unit: the correct time value when mainly obtaining measured current, temperature and ambient temperature and humidity, for the fault status information inquiry provides valuable information.Clock unit mainly is made of clock chip (U11), crystal oscillator (X1) and standby power supply (B1), the data line of clock chip, clock line, reset line link to each other with the P2.7 mouth with P2.5, the P2.6 of microcontroller, and adopting the dual power supply mode, system clock unit still can operate as normal after the unexpected power down of assurance civil power.
As Fig. 9, described communication unit: mainly be in order to realize and the communication of host computer and the centralized displaying and the processing of data.Monitoring device and host computer use the RS-485 bus to carry out data communication, and host computer is is once patrolled and examined each monitoring device at set intervals, and Monitoring Data is uploaded to host computer.Communication unit is made of power supply (U18), photoelectric isolating device (U19/U20/U21) and RS-485 bus driver (U22).The insulating power supply that interface working power using system provides, the RS-485 bus driver carries out data communication by the serial ports of photoelectric isolating device and microcontroller.
A kind of hardware configuration that is used for the monitoring device of high voltage cable connector status in mine roadway that the invention process is above-mentioned, those skilled in the art can obtain the combination of corresponding system software and software, and can realize the automated job of mine laneway high-voltage cable joint shape operational management, improve mine laneway high-voltage cable joint reliability of operation.

Claims (1)

1. monitoring device that is used for high voltage cable connector status in mine roadway, comprise temperature sensor, Temperature Humidity Sensor, current transformer, micro controller unit, data acquisition unit, data storage cell, acousto-optic warning unit, communication unit, keyboard, display unit, clock unit, it is characterized in that:
Temperature sensor, Temperature Humidity Sensor, current transformer are connected with data acquisition unit by signal wire, data acquisition unit, data storage cell, keyboard, display unit, clock unit and acousto-optic warning unit are connected with micro controller unit by the I/O mouth, micro controller unit is connected to form the monitoring device that is used for high voltage cable connector status in mine roadway by serial ports and communication unit, monitors temperature, electric current and the humidity of cable splice in real time;
Described micro controller unit is that crystal oscillator (X1/X2) is connected with the crystal oscillator pin I/O interface of microcontroller (U0), reset button (S1) links to each other with the reset pin I/O of microcontroller (U0), and debugging interface (U1) is connected with the corresponding I/O interface of microcontroller (U0);
Described data acquisition unit is divided into current acquisition unit, temperature collecting cell and ambient humidity collecting unit; Signal conditioning circuit one side that the current acquisition unit is made up of operational amplifier (U5/U6/U7/U8/U9/U10) is connected with current transformer (U2/U3/U4), and opposite side is connected with the A/D conversion I/O of microcontroller;
Described temperature data samwpling unit is that the data line of temperature sensor (U11/U12/U13) is connected with microcontroller I/O;
Described humidity data collecting unit is that the clock line of Temperature Humidity Sensor (U14) is connected with microcontroller I/O with data line;
Described data storage cell is that the data line of EEPROM (U15) is connected with microcontroller I/O with clock line;
Described keyboard unit is that 3 * 3 keyboards are connected with the I/O that microcontroller has interrupt function;
Described display unit is that the 8 bit parallel data lines and the control line of display (U16) is connected with microcontroller I/O;
Described acousto-optic warning unit is that two triodes (Q1/Q2) side links to each other with loudspeaker (LS) with luminotron (LED) respectively, and opposite side is connected with microcontroller I/O interface;
Described clock unit comprises that mainly the crystal oscillator pin of clock chip (U17) is connected with crystal oscillator (X1), and power lead is connected with standby power supply (B1) with system power supply VCC, and data line is connected with microcontroller I/O interface with clock line;
Described communication unit is that photoisolator (U19/U20/U21) side is connected with RS-485 bus driver (U22), and opposite side is connected with the serial ports of microcontroller MCU; Photoisolator is connected with system insulating power supply (U18) with RS-485 bus driver power lead.
CN2009100749781A 2009-07-21 2009-07-21 Monitoring device used for high voltage cable connector status in mine roadway CN101614597B (en)

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