CN201162544Y - Intelligent monitoring instrument for mine stray current - Google Patents

Intelligent monitoring instrument for mine stray current Download PDF

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Publication number
CN201162544Y
CN201162544Y CNU2008200187056U CN200820018705U CN201162544Y CN 201162544 Y CN201162544 Y CN 201162544Y CN U2008200187056 U CNU2008200187056 U CN U2008200187056U CN 200820018705 U CN200820018705 U CN 200820018705U CN 201162544 Y CN201162544 Y CN 201162544Y
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China
Prior art keywords
intelligent monitor
data acquisition
stray
stray current
current
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Application number
CNU2008200187056U
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Chinese (zh)
Inventor
吴元峰
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吴元峰
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Priority to CNU2008200187056U priority Critical patent/CN201162544Y/en
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Publication of CN201162544Y publication Critical patent/CN201162544Y/en

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Abstract

The utility model discloses a mine stray current intelligent monitor, the core circuit of which is a completely integrated mixed signal system grade microprocessor chip. Stray current signals to be detected are accessed to the data acquisition forward channel of the intelligent monitor through a wiring terminal, processed by the data acquisition forward channel of the intelligent monitor and output to the ADC voltage signal input end of the processor chip. CUP in the chip timely acquires the conversion output of ADC. Digital judge is implemented after the digital filtering. When the limit is overrun, alarming signals are sent out, and an alarming circuit alarms. The CUP in the chip outputs the worked out stray current numerical values to a data acquisition afterward channel through a DAC circuit in the chip to be processed to obtain standard signals. The CPU simultaneously stores the worked out stray current numerical values in a flash erasable memory and sends the numerical values to a Chinese LCD display module to be real-timely displayed. The mine stray current intelligent monitor has the functions of measurement, calculation, memory storage, industrial standard signal output, digital interface, alarming, etc.

Description

A kind of Stray Current in Mines intelligent monitor

Technical field

The utility model relates to the electrical measurement technology, relates in particular to a kind of Stray Current in Mines intelligent monitor.

Background technology

In China mine, single trolley line formula dc electric formula electric locomotive is widely used as the important haulage device in down-hole.In this networking, feeder line is erected at above the electric locomotive, utilize conveying track double as backflow conductor, but do not have electrical insulation between track and the roadway floor, should be all through rail flow back into unsteady flow electric current some is flowed into the earth through rail, flow back to traction current transformation institute through the earth again.This part not in accordance with regulations the electric current that flows of path (promptly without rail flow back to traction current transformation electric current) be called stray electrical current.

The existence of stray electrical current is to mine underground work personnel's the life security and the potential harm of security presence of production equipment.Its main harm sex expression is: 1, stray electrical current may cause the blast of electric cap mistake.When the potential difference between track and tunnel rock or the metal object (as pipeline, cable sheath etc.) that communicates with the tunnel rock reaches 1~1.5V, if in two detonation leads of electric cap one contacts with rail, another root contacts with rock or other metal objects (with the rock person of communicating), the electric current that flows through in the electric cap might surpass 93m A, will ignite electric cap, this situation is very dangerous.2, to cable and corrosion of pipe.The stray electrical current metallic conductors such as the metallic conduit that communicates with the earth and cable sheath of will flowing through.On these metallic conductors, also will form anode region and cathodic region.Because the humidity of down-hole and the existence of acid water, thereby the corrosion phenomenon that can produce electrolysis in the anode region of metallic conductor.The size of corrosiveness and the size of stray electrical current and relevant by the length of electric current perdurabgility.Add up according to interrelated data: 1 year corrodible 9.1kg steel of the stray electrical current of 1A or 10.3kg copper or 33.3kg lead.The more important thing is that the galvano-cautery effect of metal and cable sheath is also inhomogeneous.After the cable sheath part was by eating thrown, moisture enters cable can make insulation be destroyed, and accidents caused.3,, make leak detection relay generation misoperation to the influence of low pressure leak detection relay.

China is in order to prevent and treat the mine stray electrical current, country successively formulated People's Republic of China's coal industry standard " traction network stray electrical current Prevention Technique standard under the coal mine " (MT670-1997) and State Standard of the People's Republic of China's " Measurement of Stray Current in Mines " (GB/T17682-1999).But because stray electrical current is to be subjected to traction electric motor operating condition and a dynamic variable of real-time change, now relevant monitoring technology means and the more outmoded backwardness of equipment, Common Instrument is some common pointer instruments, so in measuring at the scene, often can only draw the data of certain time point, the actual change situation that can not reflect stray electrical current, and mensuration work is wasted time and energy.Just because of this, many mines do not go for this mensuration work, to such an extent as to do not understand the distribution situation of this Stray Current in Mines, this has buried great hidden danger for the safety in production in mine.Still do not realize the plant and instrument of dynamic monitoring stray electrical current at present both at home and abroad.A kind of instrument that can the timely monitor stray electrical current is badly in need of in the mine, detects the content of stray electrical current, in order to taking control measures.Therefore, design Stray Current in Mines intelligent monitor has important practical significance, and this will play great function to the safety in production of mine.

Summary of the invention

The purpose of this utility model provides a kind of Stray Current in Mines intelligent monitor that integrates sensor and recorder, and it has functions such as measurement, calculating, storage memory, industry standard signal output, digital interface, warning.

The Stray Current in Mines intelligent monitor, it is characterized in that core circuit is fully-integrated mixed-signal system level microprocessor chip, after stray electrical current signal to be measured is handled through wiring terminal access intelligent monitor data acquisition forward path, output to the ADC voltage signal input of processor chips, the conversion of CPU timing acquiring ADC output in the sheet is through behind the digital filtering, carrying out numerical value judges, when transfiniting, send alarm signal, report to the police by warning circuit; CPU outputs to the processing of data acquisition backward channel with the stray electrical current numerical value that calculates through the DAC circuit in the sheet and obtains industry standard signal in the sheet, so that can network with current mine commonly used monitoring system, CPU is kept at the stray electrical current numerical value that calculates in the flash memory simultaneously and send Chinese fonts lcd module to show in real time.Also be provided with serial communication interface and expansion has keypad.

The technical solution of the utility model is: the Stray Current in Mines intelligent monitor mainly is made up of circuit such as embedded microcontroller, data acquisition forward path, data output backward channel, flash memory, real-time clock, Interface for digital communication, warning circuit, Chinese fonts lcd module, keyboards.Embedded microcontroller adopts fully-integrated mixed-signal system level chip C8051F, this is the type that a kind of extremely is suitable for TT﹠C system, it has adopted pipelining, the execution efficient height of instruction, multiple resources such as house dog, ADC, DAC, voltage reference output, timer have been comprised in the sheet, and integrated JTAG, support online programming.Stray electrical current signal to be measured inserts intelligent monitor data acquisition forward path through wiring terminal, through becoming the voltage signal that ADC can handle in the C8051F sheet after the forward path conditioning.The conversion of CPU timing acquiring ADC output in the C8051F sheet through behind the digital filtering, is carried out numerical value and is judged, when transfiniting, sends alarm signal.CPU becomes according to predefined scale the stray electrical current numerical value that calculates the industry standard signal of 4~20mA or 200~1000Hz through DAC circuit or photoelectric isolating circuit, so that can network with current mine commonly used monitoring system, CPU is kept at the stray electrical current numerical value that calculates in the flash memory simultaneously and send Chinese fonts lcd module to show in real time.This Stray Current in Mines intelligent monitor has RS232 or RS485 serial communication interface, all image data can be transferred in the computer with digital communication mode, so that further handle.May realize measuring work such as control, clock alignment, transmission data by keyboard circuit.

This Stray Current in Mines intelligent monitor major function has: the measurement category of (1) stray electrical current is 0~1A; (2) but the storage memory capacity of monitor can be protected its continuous operation 24 hours at least; (3) has the overload alarm function; (4) data can keep after the power down; (5) monitor has standard signal output (4~20mA or 200~1000Hz) can network with current mine commonly used monitoring system.(6) have RS232 or RS485 serial communication interface, all image data can be transferred in the computer, in order to post-processed.(7) adopt the liquid crystal display of keyboard and dot matrix Chinese, easy to operate, man-machine interface close friend.

Description of drawings:

Fig. 1 is the utility model schematic block circuit diagram.

Fig. 2 is the utility model circuit theory diagrams

The specific embodiment

The utility model is described in further detail below in conjunction with the embodiment of accompanying drawing:

Embodiment of the present utility model provides a kind of Stray Current in Mines intelligent monitor that integrates sensor and recorder, and it has functions such as measurement, calculating, storage memory, industry standard signal output, digital interface, warning.Want in the present embodiment, described standard for serial communication is the RS485 standard for serial communication, perhaps the RS232 standard for serial communication; Its standard signal that has is output as 4~20mA or 200~1000Hz, can network with current mine commonly used monitoring system.

Embedded microcontroller adopts fully-integrated mixed-signal system level chip C8051F020, comprised in its sheet that house dog, sampling rate are multiple resources such as 12 ADC of KHZ, 12 DAC, voltage reference output, timer, and integrated JTAG, support online programming.It is the main data acquisition forward path that makes up that stray electrical current signal to be measured inserts operational amplifier LM224 through wiring terminal, through becoming 0~2.5V voltage signal that ADC can handle in the C8051F020 sheet after the forward path conditioning.The conversion of CPU timing acquiring ADC output in the C8051F sheet through behind the digital filtering, is carried out numerical value and is judged, when transfiniting, sends alarm signal.CPU is the industry standard signal (or become through digital I0 mouth and photoelectric isolating circuit 200~1000Hz industry standard signal) of the main data acquisition backward channel output 4~20mA that makes up through 12 DAC circuit in the sheet and with LM224 according to predefined scale with the stray electrical current numerical value that calculates, so that can network with current mine commonly used monitoring system, CPU is kept at the stray electrical current numerical value that calculates among the flash memory 24C256 simultaneously and send Chinese fonts lcd module to show in real time.This Stray Current in Mines intelligent monitor adopts MAX232 or MAX485 chip formation to have RS232 or RS485 serial communication interface, all image data can be transferred in the computer with digital communication mode, so that further handle.Keyboard circuit is total to be shifted, to adjust, confirms, withdraws from four keys, and the keyboard multiplexing function that adopts during programming cooperates menu in Chinese can realize measuring work such as control, clock alignment, transmission data easily.

Claims (3)

1, Stray Current in Mines intelligent monitor, it is characterized in that core circuit is fully-integrated mixed-signal system level microprocessor chip, after stray electrical current signal to be measured is handled through wiring terminal access intelligent monitor data acquisition forward path, output to the ADC voltage signal input of processor chips, the conversion of CPU timing acquiring ADC output in the sheet is through behind the digital filtering, carrying out numerical value judges, when transfiniting, send alarm signal, report to the police by warning circuit; CPU outputs to the processing of data acquisition backward channel with the stray electrical current numerical value that calculates through the DAC circuit in the sheet and obtains industry standard signal in the sheet, so that can network with current mine commonly used monitoring system, CPU is kept at the stray electrical current numerical value that calculates in the flash memory simultaneously and send Chinese fonts lcd module to show in real time.
2, Stray Current in Mines intelligent monitor according to claim 1 is characterized in that also being provided with serial communication interface and expansion has keypad.
3, Stray Current in Mines intelligent monitor according to claim 1, it is characterized in that described core circuit is that fully-integrated mixed-signal system level microprocessor chip adopts C8051F020, the data acquisition forward path is main the structure by operational amplifier LM224, the data acquisition backward channel is main the structure with LM224, and flash memory adopts 24C256.
CNU2008200187056U 2008-03-01 2008-03-01 Intelligent monitoring instrument for mine stray current CN201162544Y (en)

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Application Number Priority Date Filing Date Title
CNU2008200187056U CN201162544Y (en) 2008-03-01 2008-03-01 Intelligent monitoring instrument for mine stray current

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2008200187056U CN201162544Y (en) 2008-03-01 2008-03-01 Intelligent monitoring instrument for mine stray current

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CN201162544Y true CN201162544Y (en) 2008-12-10

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101833313A (en) * 2010-03-29 2010-09-15 哈尔滨工程大学 Plastic optical fiber bus optical information coupling device
CN101833312A (en) * 2010-03-29 2010-09-15 哈尔滨工程大学 Photoelectrical coupling type terminal device
CN102508018A (en) * 2011-11-10 2012-06-20 上海电机学院 Stray current monitoring and protecting device and method
CN103711524A (en) * 2013-12-31 2014-04-09 西安科技大学 Coal mine stray current monitoring system of ZigBee network
CN103792418A (en) * 2014-01-06 2014-05-14 沈阳化工大学 Intelligent stray current testing instrument
CN105403762A (en) * 2015-11-30 2016-03-16 重庆金鑫智慧科技有限公司 Intelligent monitor for mine stray current
CN107671021A (en) * 2017-09-15 2018-02-09 辽宁工程技术大学 A kind of coal mine safety monitoring device
CN111024769A (en) * 2019-12-17 2020-04-17 中国矿业大学 Coal mine advanced detection method for heading machine

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101833313A (en) * 2010-03-29 2010-09-15 哈尔滨工程大学 Plastic optical fiber bus optical information coupling device
CN101833312A (en) * 2010-03-29 2010-09-15 哈尔滨工程大学 Photoelectrical coupling type terminal device
CN102508018A (en) * 2011-11-10 2012-06-20 上海电机学院 Stray current monitoring and protecting device and method
CN103711524A (en) * 2013-12-31 2014-04-09 西安科技大学 Coal mine stray current monitoring system of ZigBee network
CN103711524B (en) * 2013-12-31 2016-02-10 西安科技大学 The colliery scramble current monitoring system of ZigBee-network
CN103792418A (en) * 2014-01-06 2014-05-14 沈阳化工大学 Intelligent stray current testing instrument
CN105403762A (en) * 2015-11-30 2016-03-16 重庆金鑫智慧科技有限公司 Intelligent monitor for mine stray current
CN107671021A (en) * 2017-09-15 2018-02-09 辽宁工程技术大学 A kind of coal mine safety monitoring device
CN111024769A (en) * 2019-12-17 2020-04-17 中国矿业大学 Coal mine advanced detection method for heading machine

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Granted publication date: 20081210