CN208833873U - A kind of low voltage mine cable insulation monitoring device - Google Patents
A kind of low voltage mine cable insulation monitoring device Download PDFInfo
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- CN208833873U CN208833873U CN201821528242.8U CN201821528242U CN208833873U CN 208833873 U CN208833873 U CN 208833873U CN 201821528242 U CN201821528242 U CN 201821528242U CN 208833873 U CN208833873 U CN 208833873U
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Abstract
The utility model discloses a kind of low voltage mine cable insulation monitoring devices, including multiple current temperature monitoring modulars and data processing monitoring module, the current temperature monitoring modular includes current acquisition unit and temperature collecting cell, the current acquisition unit includes current sensor and signal conditioning circuit, the temperature collecting cell includes temperature sensor and filter circuit, the data processing monitoring module includes the first data processing module, second data processing module and remote monitoring terminal, first data processing module includes the first microcontroller, first SRAM memory and the first flash storage, second data processing module includes the second microcontroller, second SRAM memory and the second flash storage.The utility model structure is simple, at low cost, and safe and reliable, real-time detection, improves safety of coal mines, practical.
Description
Technical field
The utility model belongs to mine low-voltage cable insulation state monitoring technical field, more particularly, to a kind of mining low pressure
Cable insulation monitoring device.
Background technique
The electricity consumption of underground coal mine power is by cable power supply, and underworkings is narrow, dark humidity, it may occur that caving and rock collapse
Sunken accident makes cable that short circuit, state of insulation easily occur in operation, and then causes gas and dust explosion, equipment burnout to underground
Power supply and production safety bring great threat.Downhole cable maintenance at present still uses scheduled overhaul mode, i.e., periodically to electricity
Cable carries out preventive trial and daily maintenance, makes an inspection tour.People is overhauled for the mechanical damage failure occurred most frequently in underground
Member can be had found by Daily Round Check.For humidified insulation and insulation ag(e)ing, because it is physics, the chemical change that insulating inner occurs
It generally can not with the naked eye observe, the process of especially insulation ag(e)ing continues to be not easy to be found more long, can pass through for such failure
The degree of some state parameter changed to reflect its insulation degradation in monitoring cable insulation ageing process.
Common state parameter has dielectric loss angle tan δ, flip-flop, insulation resistance, cable surface temperature, part to put
Electricity.Wherein flip-flop, partial discharge quantity are widely used in the monitoring of high-voltage cable insulating.It is surveyed at present using digital insulation
When trying device detection cable insulation against ground resistance, it is necessary to which the power supply for cutting off cable is unable to real-time detection；There is also digital Jie in market
Loss measurement instrument reflects its dielectric performance by the dielectric loss angle tan δ of cable, but its higher cost；In addition, at present
Detection only generally is carried out to the surface temperature of cable or only the earth current of cable is detected, such detection mode list
One, once detection device breaks down, then it cannot reflect cable insulation status in time.Therefore, nowadays lack a kind of structure letter
Single, the reasonable low voltage mine cable insulation monitoring device of design, it is mining by the temperature integrated judgement of earth current and cable surface
The state of insulation of low-voltage cable, at low cost and safe and reliable, real-time detection.
Utility model content
It is a kind of mining the technical problem to be solved by the utility model is in view of the deficiency of the prior art, provide
Low-voltage cable insulation monitoring device, simple structure and reasonable design and it is easy to use, using effect is good, pass through ground connection electricity
The state of insulation of stream and the temperature integrated judgement low voltage mine cable of cable surface, at low cost and safe and reliable, real-time detection are kept away
Exempt from low voltage mine cable state of insulation and caused by safety accident, improve safety of coal mines, it is practical.
In order to solve the above technical problems, the technical solution adopted in the utility model is: a kind of low voltage mine cable insulation prison
Survey device, it is characterised in that: including multiple current temperatures being monitored respectively to the state of insulation of multiple mine low-voltage cables
Monitoring modular and the data processing monitoring module to connect with multiple current temperature monitoring modulars, the current temperature monitor mould
Block includes the current acquisition unit detected to the earth current of mine low-voltage cable and to mine low-voltage cable surface temperature
The temperature collecting cell detected, the current acquisition unit include current sensor and connect with current sensor output
Signal conditioning circuit, the temperature collecting cell includes temperature sensor and the filtered electrical that connects with temperature sensor output end
Road；
The data processing monitoring module includes that the first data processing module, the second data processing module and long-range monitoring are whole
End, first data processing module include the first microcontroller and the first SRAM memory for connecting with the first microcontroller
With the first flash storage, second data processing module includes the second microcontroller and connects with the second microcontroller
The second SRAM memory and the second flash storage, the remote monitoring terminal be computer, first microcontroller with
Second microcontroller connects and carries out data communication, and second microcontroller and computer carry out data communication, the signal
The output end of conditioning circuit and filter circuit connects with the first microcontroller.
Above-mentioned low voltage mine cable insulation monitoring device, it is characterised in that: the output of the computer is terminated with alarm
Device and display screen, second microcontroller are connected by serial communication modular with computer.
Above-mentioned low voltage mine cable insulation monitoring device, it is characterised in that: the signal conditioning circuit includes chip
Three tunnels of the 1st pin of LM2902DR, the chip LM2902DR point, connect with one end of capacitor C8, another way is through resistance all the way
R15 ground connection, third road connects with one end of capacitor C11；The 2nd pin of the chip LM2902DR is grounded through resistance R16, described
The 3rd pin of chip LM2902DR divides two-way, is grounded all the way through capacitor C13, and another way connects with one end of resistance R24；It is described
The other end of resistance R24 divides two-way, connects all the way with the other end of capacitor C8, and another way connects with one end of resistance R23；It is described
The other end of resistance R23 divides two-way, connects all the way through resistance R21 with the output end of current sensor, another way connects through resistance R28
Ground；The 4th pin of the chip LM2902DR connects+12V power output end, and the 5th pin of the chip LM2902DR divides three tunnels,
The first via connects with the other end of capacitor C11, the second road resistance R22 ground connection, third road and the 10th of the chip LM2902DR
Pin connects；Three tunnels of the 6th pin of the chip LM2902DR point, the first via are grounded through resistance R26, the second tunnel and double diode
The 2nd pin of BAV99 connects, and third road connects with one end of resistance R29；The 7th pin of the chip LM2902DR and double two
The 3rd pin of pole pipe BAV99 connects, and the 8th pin of the chip LM2902DR divides two-way, all the way with one end phase of resistance R31
It connects, another way connects with one end of resistance R19；The 9th pin of the chip LM2902DR divides two-way, all the way with resistance R30's
One end connects, and another way connects with the other end of resistance R31；The other end of the resistance R30 divides two-way, all the way with resistance R29
The other end connect, another way connects with the 1st pin of double diode BAV99；The 11st pin of the chip LM2902DR connects-
12nd pin of 12V power output end, the chip LM2902DR connects with one end of resistance R20, the chip LM2902DR
The 13rd pin and the connecting pin of the 14th pin divide two-way, connect all the way through resistance R14 with the first microcontroller, another way and electricity
The one end for holding C10 connects；The other end of the capacitor C10 point three tunnels, connect with the other end of resistance R19 all the way, another way with
The other end of resistance R20 connects, and third road is grounded through capacitor C14.
Above-mentioned low voltage mine cable insulation monitoring device, it is characterised in that: the filter circuit includes chip LM358,
The normal phase input end of the chip LM358 is divided into two-way, is grounded all the way through capacitor C12, one end phase of another way and resistance R18
It connects；The other end of the resistance R18 divides two-way, connects all the way through resistance R17 with the output end of temperature sensor, another way and electricity
The one end for holding C9 connects；The inverting input terminal of the chip LM358 connects with one end of resistance R25, and the resistance R25's is another
Two-way is divided at end, is grounded all the way, another way connects with one end of resistance R27；Three tunnels of the output end of the chip LM358 point, all the way
Connect with the other end of capacitor C9, the other end connects with the other end of resistance R27, and third road connects with the first microcontroller.
Above-mentioned low voltage mine cable insulation monitoring device, it is characterised in that: the mine low-voltage cable is MY-0.38/
0.66 movable rubber jacketed flexible cable for mining or MYP-0.66/1.14 mine movable shield soft rubber cable.
Above-mentioned low voltage mine cable insulation monitoring device, it is characterised in that: the mine low-voltage cable include restrictive coating,
The power core conductor being arranged in restrictive coating and the ground wire core conductor being arranged in restrictive coating, the power core conductor include
A phase cable core conductor, B phase cable core conductor and C phase cable core conductor, the A phase cable core conductor, B phase cable core conductor, C phase cable core conductor
With insulating layer, and the A phase cable core conductor, B phase cable core conductor, C phase cable core conductor and ground are provided with outside ground wire core conductor
Insulation fill stratum is filled between cable core conductor, the current sensor is mounted in ground wire core conductor, the temperature sensor
3-2 is mounted on restrictive coating.
Above-mentioned low voltage mine cable insulation monitoring device, it is characterised in that: the first microcontroller is TMS320VC5509
DSP microcontroller, the second microcontroller be AT91RM9200 ARM9 microcontroller.
Compared with the prior art, the utility model has the following advantages:
1, used current monitoring device simple structure and reasonable design and easy to operate, input cost is lower.
2, used current acquisition unit includes current sensor and signal conditioning circuit, and current sensor is to mining low
The earth current of voltage cable is acquired, and the earth current for the low voltage mine cable that will test is sent to signal condition electricity
Road, the earth current for the low voltage mine cable that signal conditioning circuit will test is sent to the first microcontroller, to be connect
Earth-current, convenient for the analysis of subsequent low voltage mine cable state of insulation.
3, used temperature collecting cell includes temperature sensor and filter circuit, and temperature sensor is to mining low tension
Cable surface temperature is acquired, and the low voltage mine cable surface temperature that will test is sent to filter circuit, and filter circuit will
The low voltage mine cable surface temperature signal detected is sent to the first microcontroller after being filtered denoising, to obtain
Low voltage mine cable surface temperature, convenient for the analysis of subsequent low voltage mine cable state of insulation.
4, the state of insulation of used current sensor and the common detection cable of temperature sensor is because of temperature sensing
Device is laid in outside the restrictive coating of cable, in this way in view of in downhole cable operational process movement it is more frequent, damage temperature sensor and
Can not detection cable state of insulation；It in addition is because there are three phase unbalance currents will cause current sensor detection in power grid
The earth current arrived increases, to judge the state of insulation of cable by accident, therefore composite cable surface temperature and earth current, improves inspection
Survey the reliability and accuracy of device.
In conclusion the utility model is designed reasonably and it is easy to use, using effect is good, pass through earth current and electricity
The state of insulation of cable surface temperature comprehensive descision low voltage mine cable, at low cost and safe and reliable, real-time detection avoid mining
Low-voltage cable state of insulation and caused by safety accident, improve safety of coal mines, it is practical.
Below by drawings and examples, the technical solution of the utility model is described in further detail.
Detailed description of the invention
Fig. 1 is the schematic block circuit diagram of the utility model.
Fig. 2 is the circuit diagram of the utility model signal conditioning circuit.
Fig. 3 is the circuit diagram of the utility model filter circuit.
Fig. 4 is the structural schematic diagram of the utility model low voltage mine cable.
Description of symbols:
1-1-restrictive coating；1-2-A phase cable core conductor；1-3-B phase cable core conductor；
1-4-C phase cable core conductor；1-5-ground wire core conductor；1-6-insulating layer；
1-7-insulation fill stratum；2-display screens；3-temperature collecting cells；
3-1-temperature sensor；3-2-filter circuit；4-alarms；
5-current acquisition units；5-1-current sensor；5-2-signal conditioning circuit；
6-the first microcontroller；7-the second microcontroller；8-the first SRAM memory；
9-the first flash storage；10-the second SRAM memory；
11-the second flash storage；12-serial communication modulars；13-computers.
Specific embodiment
As shown in Figure 1, a kind of low voltage mine cable insulation monitoring device, including it is multiple respectively to multiple mine low-voltage cables
The state of insulation current temperature monitoring modular being monitored and the data to connect with multiple current temperature monitoring modulars at
Monitoring module is managed, the current temperature monitoring modular includes the current acquisition detected to the earth current of mine low-voltage cable
Unit 5 and the temperature collecting cell 3 detected to mine low-voltage cable surface temperature, the current acquisition unit 5 include electricity
Flow sensor 5-1 and the signal conditioning circuit 5-2 to connect with current sensor 5-1 output end, the temperature collecting cell 3 include
The temperature sensor 3-1 and filter circuit 3-2 to connect with temperature sensor 3-1 output end；
The data processing monitoring module includes that the first data processing module, the second data processing module and long-range monitoring are whole
End, first data processing module include the first microcontroller 6 and the first SRAM to connect with the first microcontroller 6 storage
Device 8 and the first flash storage 9, second data processing module include the second microcontroller 7 and with the second microcontroller
7 the second SRAM memories 10 and the second flash storage 11 to connect, the remote monitoring terminal are computer 13, described the
One microcontroller 6 connects with the second microcontroller 7 and carries out data communication, and second microcontroller 7 is carried out with computer 13
The output end of data communication, the signal conditioning circuit 5-2 and filter circuit 3-2 connect with the first microcontroller 6.
In the present embodiment, the output of the computer 13 is terminated with alarm 4 and display screen 2, second microcontroller 7
Connected by serial communication modular 12 with computer 13.
As shown in Fig. 2, the signal conditioning circuit 5-2 includes chip LM2902DR, the chip in the present embodiment
Three tunnels of the 1st pin of LM2902DR point, connect with one end of capacitor C8, another way is grounded through resistance R15, third Lu Yu electricity all the way
The one end for holding C11 connects；The 2nd pin of the chip LM2902DR is grounded through resistance R16, and the 3rd of the chip LM2902DR the
Pin divides two-way, is grounded all the way through capacitor C13, and another way connects with one end of resistance R24；The other end of the resistance R24 point
Two-way connects with the other end of capacitor C8 all the way, and another way connects with one end of resistance R23；The other end of the resistance R23 point
Two-way connects through resistance R21 with the output end of current sensor 5-1 all the way, and another way is grounded through resistance R28；The chip
The 4th pin of LM2902DR connects+12V power output end, three tunnels of the 5th pin point of the chip LM2902DR, the first via and electricity
The other end for holding C11 connects, and the second road resistance R22 ground connection, third road connects with the 10th pin of the chip LM2902DR；Institute
Three tunnels of the 6th pin point of chip LM2902DR are stated, the first via is grounded through resistance R26, the second tunnel and the 2nd of double diode BAV99
Pin connects, and third road connects with one end of resistance R29；The 7th pin of the chip LM2902DR is with double diode BAV99's
3rd pin connects, and the 8th pin of the chip LM2902DR divides two-way, connects all the way with one end of resistance R31, another way with
One end of resistance R19 connects；The 9th pin of the chip LM2902DR divides two-way, connects all the way with one end of resistance R30, separately
Connect all the way with the other end of resistance R31；The other end of the resistance R30 divides two-way, all the way with the other end phase of resistance R29
It connects, another way connects with the 1st pin of double diode BAV99；It is defeated that the 11st pin of the chip LM2902DR connects -12V power supply
12nd pin of outlet, the chip LM2902DR connects with one end of resistance R20, the 13rd pin of the chip LM2902DR
Divide two-way with the connecting pin of the 14th pin, connects all the way through resistance R14 with the first microcontroller 6, the one of another way and capacitor C10
End connects；Three tunnels of the other end of the capacitor C10 point, connect with the other end of resistance R19 all the way, and another way is with resistance R20's
The other end connects, and third road is grounded through capacitor C14.
As shown in figure 3, the filter circuit 3-2 includes chip LM358 in the present embodiment, the positive of the chip LM358
Input terminal is divided into two-way, is grounded all the way through capacitor C12, and another way connects with one end of resistance R18；The resistance R18's is another
Two-way is divided at end, connects all the way through resistance R17 with the output end of temperature sensor 3-1, another way connects with one end of capacitor C9；Institute
The inverting input terminal for stating chip LM358 connects with one end of resistance R25, and the other end of the resistance R25 divides two-way, connects all the way
Ground, another way connect with one end of resistance R27；The output end of the chip LM358 point three tunnels, all the way with the other end of capacitor C9
Connect, the other end connects with the other end of resistance R27, and third road connects with the first microcontroller 6.
In the present embodiment, the mine low-voltage cable is MY-0.38/0.66 movable rubber jacketed flexible cable for mining or MYP-
0.66/1.14 mine movable shields soft rubber cable.
As shown in figure 4, the mine low-voltage cable includes restrictive coating 1-1, is arranged in restrictive coating 1-1 in the present embodiment
Power core conductor and the ground wire core conductor 1-5 that is arranged in restrictive coating 1-1, the power core conductor includes A phase core
Conductor 1-2, B phase cable core conductor 1-3 and C phase cable core conductor 1-4, A phase cable core conductor 1-2, B phase cable core conductor 1-3, the C phase
Insulating layer 1-6, and A phase cable core conductor 1-2, the B phase core are provided with outside cable core conductor 1-4 and ground wire core conductor 1-5
Insulation fill stratum 1-7, the current sensor 5- are filled between conductor 1-3, C phase cable core conductor 1-4 and ground wire core conductor 1-5
1 is mounted on ground wire core conductor 1-5, and the temperature sensor 3-2 is mounted on restrictive coating 1-1.
In the present embodiment, the first microcontroller 6 is the DSP microcontroller of TMS320VC5509, and the second microcontroller 7 is
The ARM9 microcontroller of AT91RM9200.
In the present embodiment, it should be noted that the connecting pin of the 13rd pin and the 14th pin of the chip LM2902DR
Divide two-way, connects all the way through resistance R14 with the A/D translation interface AIN0 of the first microcontroller 6, the output of the chip LM358
The third road at end connects with the A/D translation interface AIN1 of the first microcontroller 6.
In the present embodiment, it is that TI company releases that the first microcontroller 6, which is the DSP microcontroller of TMS320VC5509,
High-performance, low-power consumption 16 are fixed-point DSP chip, and cost is relatively low, and internal contain 10 Approach by inchmeal A/D converters.
In the present embodiment, external the first SRAM memory 8 and the first flash storage 9 are set and carry out extended menory, one
Aspect is on the other hand to avoid the loss of acquisition earth current data to improve processing speed.
In the present embodiment, the first SRAM memory 8 is set, is to provide for the first microcontroller 6 and operational data is provided
Temporary parking space.
In the present embodiment, the setting of the first flash storage 9 is in order to by the multiple mining low tensions of each sampling instant
The earth current value of cable and the storage of mining voltage cables surface temperature value, and the first flash storage 9 can be under power-down conditions
Not losing for the preservation of realization data, guarantee electric current and temperature detection data, improves cable detection accuracy.
In the present embodiment, the first SRAM memory 8 is the SRAM memory of the HY57V161610D of Hynix company.
In the present embodiment, the first flash storage 9 is the flash storage of SST39VF3201.
In the present embodiment, is communicated, do not needed by HPI interface between the first microcontroller 6 and the second microcontroller 7
Increase the circuit of periphery, it is simple and convenient, the conflict between hardware is effectively evaded in communication process, improves the first microcontroller
6 and the respective speed of service of the second microcontroller 7, compared with being adapted to, real-time is high, volume of transmitted data is more.
In the present embodiment, it is a be based on that the second microcontroller 7, which is the ARM9 microcontroller of AT91RM9200,
32 8-digit microcontrollers of ARM920T core, dominant frequency 180MHz, processing speed is fast, and function is strong, and cost performance is high, it can configure it
The function register of his chip, scheduling controlling whole system works in normal operation.
In the present embodiment, the second microcontroller 7 is set, is on the one hand realized to the multiple low voltage mine cables of each sampling instant
Earth current value and mining voltage cables surface temperature value storage, checked convenient for data；It on the other hand is in order to mining low
The earth current value of voltage cable and the storage of mining voltage cables surface temperature value carry out discriminatory analysis, judge the mining low tension of each item
Cable insulation status, and when certain low voltage mine cable insulation insulation decline, it issues warning signal and reminds mine to computer 13
Electromechanical personnel in time overhaul this route, and the second microcontroller 7 and the division of labor of the first microcontroller 6, are to guarantee two
The reliable and stable operation of person, improves the monitoring time of monitoring device.
In the present embodiment, because the inside of the ARM9 microcontroller of AT91RM9200 only has 16KB DARAM, it is therefore desirable to
The second SRAM memory 10 and the second flash storage 11 outside being arranged carry out extended menory, are on the one hand to improve fortune
Speed is calculated, the loss for receiving earth current data is on the other hand avoided.
In the present embodiment, the second SRAM memory 10 is set, is to provide for the second microcontroller 7 and processing data is provided
Temporary parking space.
In the present embodiment, the setting of the second flash storage 11 is multiple mining in order to receive each sampling instant
The earth current value of low-voltage cable and the storage of mining voltage cables surface temperature value, and the second flash storage 11 can fallen
The preservation that data are realized in electric situation guarantees that the historical data of current detecting data is not lost, convenient for checking.
In the present embodiment, the second SRAM memory 8 is the CMOS Static RAM IS63LV1024 of ISSI company.
In the present embodiment, the second flash storage 9 is that 16M × 8 K9F2808U0B store flash storage.
In the present embodiment, the state of insulation of current sensor 5-1 and the common detection cable of temperature sensor 3-1 are set, are
Because temperature sensor 3-2 be laid in cable restrictive coating or or metallic sheath in, in this way in view of in downhole cable operational process
Movement it is more frequent, damage temperature sensor and can not detection cable state of insulation；In addition be because power grid in there are three-phases not
Balanced balanced current will cause the earth current that current sensor 5-1 is detected and increase, to judge the state of insulation of cable by accident, therefore comprehensive
Cable surface temperature and earth current are closed, the reliability and accuracy of detection device are improved.
In the present embodiment, the earth current of cable is detected to judge cable by the way that current sensor 5-1 is arranged
State of insulation is because the state of insulation of cable declines, and ground connection line current can increase when the aging of underground low-voltage cable or by the time of tide
Greatly.
In the present embodiment, setting temperature sensor 3-2 is detected the insulation to judge cable to the temperature of cable surface
State is because the numerical value of insulating resistance of cable can detect cable by measuring temperature with the temperature change of cable
Insulation resistance, and then cable insulation status is judged by the insulation resistance of cable；In addition, the temperature of cable surface is excessive, hold
Easily make cable insulation accelerated ageing, or even causes dielectric thermal breakdown；And temperature is excessive, it cannot be guaranteed that cable leakproof or
It works normally.
In the present embodiment, current sensor 5-1 is the measurement of DL-CT03C1.0 precision current transformer 5A/5mA punching.
In the present embodiment, the temperature sensor 3-1 is FBT-T02 fiber grating temperature sensor.
When the utility model is specifically used, current sensor 5-1 examines the earth current signal of low voltage mine cable
It surveys, and the earth current signal for the low voltage mine cable that will test is sent to signal conditioning circuit 5-2, signal conditioning circuit 5-
The earth current signal of 2 pairs of low voltage mine cables is filtered conditioning, and by the low voltage mine cable after multiple filtering conditionings
Earth current signal is sent to the first microcontroller 6, the ground connection of the low voltage mine cable after the filtering conditioning of the first 6 pairs of microcontroller
Current signal is handled, and obtains the earth current value of low voltage mine cable；Meanwhile temperature sensor 3-1 is to mining low pressure
Cable surface temperature signal is detected, and the low voltage mine cable temperature signal that will test is sent to filter circuit 3-2, filter
Wave circuit 3-2 is filtered conditioning to low voltage mine cable temperature signal, and by multiple filtered low voltage mine cable temperature
Signal is sent to the first microcontroller 6, and the first 6 pairs of microcontroller filters at the low voltage mine cable temperature signal after conditioning
Reason, and obtains low voltage mine cable surface temperature value, and the first microcontroller 6 is by the earth current value of obtained low voltage mine cable
It is stored in the first flash storage 9 with low voltage mine cable surface temperature value, and the first microcontroller 6 is mining by what is obtained
The earth current value and low voltage mine cable surface temperature value of low-voltage cable are sent to the second microcontroller 7, the second microcontroller 7
It receives the earth current value of low voltage mine cable and low voltage mine cable surface temperature value and is stored in the second flash storage
In 11, the second microcontroller 7 judges the earth current value for receiving low voltage mine cable with earth current threshold value, together
When, the low voltage mine cable surface temperature value received is compared by the second microcontroller 7 with temperature threshold, when the second micro-control
The mine that the earth current value that device 7 processed receives low voltage mine cable is less than earth current threshold value and the second microcontroller 7 receives
It is less than temperature threshold with low-voltage cable surface temperature value, then low voltage mine cable state of insulation is good；When the second microcontroller 7 connects
The mining low pressure that the earth current value for receiving low voltage mine cable is greater than earth current threshold value or the second microcontroller 7 receives
Cable surface temperature value is greater than temperature threshold, then low voltage mine cable state of insulation insulation decline, and the second microcontroller 7 sends pre-
Alert order to computer 13, computer 13 controls alarm 4 and alarms, and computer 13 controls display screen 2 and shows mining low tension
Cable insulation decline, it is at low cost by the state of insulation of the temperature integrated judgement low voltage mine cable of earth current and cable surface, and
Safe and reliable, real-time detection, avoid low voltage mine cable state of insulation and caused by safety accident, improve safety of coal mines, it is real
It is strong with property.
The above is only the preferred embodiment of the utility model, not imposes any restrictions to the utility model, all
According to any simple modification to the above embodiments of the utility model technical spirit, change and equivalent structural changes, still
Belong in the protection scope of technical solutions of the utility model.
Claims (7)
1. a kind of low voltage mine cable insulation monitoring device, it is characterised in that: including multiple respectively to multiple mine low-voltage cables
The state of insulation current temperature monitoring modular being monitored and the data to connect with multiple current temperature monitoring modulars at
Monitoring module is managed, the current temperature monitoring modular includes the current acquisition detected to the earth current of mine low-voltage cable
Unit (5) and the temperature collecting cell (3) that mine low-voltage cable surface temperature is detected, the current acquisition unit (5)
Including current sensor (5-1) and the signal conditioning circuit (5-2) to connect with current sensor (5-1) output end, the temperature
Acquisition unit (3) includes temperature sensor (3-1) and the filter circuit (3-2) that connects with temperature sensor (3-1) output end；
The data processing monitoring module includes the first data processing module, the second data processing module and remote monitoring terminal,
First data processing module includes that the first microcontroller (6) and the first SRAM to connect with the first microcontroller (6) are deposited
Reservoir (8) and the first flash storage (9), second data processing module include the second microcontroller (7) and with second
The second SRAM memory (10) and the second flash storage (11) that microcontroller (7) connects, the remote monitoring terminal are meter
Calculation machine (13), first microcontroller (6) connect with the second microcontroller (7) and carry out data communication, second micro-control
Device (7) processed and computer (13) carry out data communication, the output end of the signal conditioning circuit (5-2) and filter circuit (3-2)
Connect with the input terminal of the first microcontroller (6).
2. low voltage mine cable insulation monitoring device described in accordance with the claim 1, it is characterised in that: the computer (13)
Output is terminated with alarm (4) and display screen (2), and second microcontroller (7) is by serial communication modular (12) and calculates
Machine (13) connects.
3. low voltage mine cable insulation monitoring device according to claim 1 or 2, it is characterised in that: the signal condition
Circuit (5-2) includes chip LM2902DR, three tunnels of the 1st pin of the chip LM2902DR point, all the way with one end of capacitor C8
Connect, another way is grounded through resistance R15, and third road connects with one end of capacitor C11；The 2nd pin of the chip LM2902DR
It is grounded through resistance R16, the 3rd pin of the chip LM2902DR divides two-way, is grounded all the way through capacitor C13, another way and resistance
One end of R24 connects；The other end of the resistance R24 divides two-way, connects all the way with the other end of capacitor C8, another way and resistance
One end of R23 connects；The other end of the resistance R23 divides two-way, all the way the output through resistance R21 Yu current sensor (5-1)
End connects, and another way is grounded through resistance R28；The 4th pin of the chip LM2902DR connects+12V power output end, the chip
Three tunnels of the 5th pin of LM2902DR point, the first via connect with the other end of capacitor C11, the second road resistance R22 ground connection, third road
Connect with the 10th pin of the chip LM2902DR；Three tunnels of the 6th pin of the chip LM2902DR point, the first via is through resistance
R26 ground connection, the second tunnel connect with the 2nd pin of double diode BAV99, and third road connects with one end of resistance R29；The chip
The 7th pin of LM2902DR connects with the 3rd pin of double diode BAV99, and the 8th pin of the chip LM2902DR is divided to two
Road connects with one end of resistance R31 all the way, and another way connects with one end of resistance R19；Draw the 9th of the chip LM2902DR
Foot divides two-way, connects all the way with one end of resistance R30, and another way connects with the other end of resistance R31；The resistance R30's is another
Two-way is divided in one end, connects all the way with the other end of resistance R29, and another way connects with the 1st pin of double diode BAV99；It is described
The 11st pin of chip LM2902DR connects -12V power output end, and the 12nd pin of the chip LM2902DR is with resistance R20's
One end connects, and two-way is divided in the 13rd pin of the chip LM2902DR and the connecting pin of the 14th pin, all the way through resistance R14 and
One microcontroller (6) connects, and another way connects with one end of capacitor C10；The other end of the capacitor C10 point three tunnels, all the way with
The other end of resistance R19 connects, and another way connects with the other end of resistance R20, and third road is grounded through capacitor C14.
4. low voltage mine cable insulation monitoring device according to claim 1 or 2, it is characterised in that: the filter circuit
(3-2) includes chip LM358, and the normal phase input end of the chip LM358 is divided into two-way, is grounded all the way through capacitor C12, another way
Connect with one end of resistance R18；The other end of the resistance R18 divides two-way, all the way through resistance R17 and temperature sensor (3-1)
Output end connect, another way connects with one end of capacitor C9；The inverting input terminal of the chip LM358 and the one of resistance R25
End connects, and the other end of the resistance R25 divides two-way, is grounded all the way, and another way connects with one end of resistance R27；The chip
Three tunnels of the output end of LM358 point, connect with the other end of capacitor C9, the other end connects with the other end of resistance R27, third all the way
Road connects with the first microcontroller (6).
5. low voltage mine cable insulation monitoring device according to claim 1 or 2, it is characterised in that: the mine low pressure
Cable is that MY-0.38/0.66 movable rubber jacketed flexible cable for mining or MYP-0.66/1.14 mine movable shield soft rubber cable.
6. low voltage mine cable insulation monitoring device according to claim 1 or 2, it is characterised in that: the mine low pressure
Cable includes restrictive coating (1-1), setting in the power core conductor in restrictive coating (1-1) and is arranged in restrictive coating (1-1)
Ground wire core conductor (1-5), the power core conductor include A phase cable core conductor (1-2), B phase cable core conductor (1-3) and C phase line
Core conductor (1-4), the A phase cable core conductor (1-2), B phase cable core conductor (1-3), C phase cable core conductor (1-4) and wire core are led
It is provided with insulating layer (1-6) outside body (1-5), and the A phase cable core conductor (1-2), B phase cable core conductor (1-3), C phase line
It is filled with insulation fill stratum (1-7) between core conductor (1-4) and ground wire core conductor (1-5), current sensor (5-1) installation
On ground wire core conductor (1-5), the temperature sensor 3-2 is mounted on restrictive coating (1-1).
7. low voltage mine cable insulation monitoring device according to claim 1 or 2, it is characterised in that: the first microcontroller
(6) the DSP microcontroller for being TMS320VC5509, the second microcontroller (7) are the ARM9 microcontroller of AT91RM9200.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821528242.8U CN208833873U (en) | 2018-09-19 | 2018-09-19 | A kind of low voltage mine cable insulation monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821528242.8U CN208833873U (en) | 2018-09-19 | 2018-09-19 | A kind of low voltage mine cable insulation monitoring device |
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| Publication Number | Publication Date |
|---|---|
| CN208833873U true CN208833873U (en) | 2019-05-07 |
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ID=66313833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821528242.8U Expired - Fee Related CN208833873U (en) | 2018-09-19 | 2018-09-19 | A kind of low voltage mine cable insulation monitoring device |
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| CN (1) | CN208833873U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112858859A (en) * | 2021-04-19 | 2021-05-28 | 江苏森海电气有限公司 | Crosslinked polyethylene power cable insulation monitoring device |
| CN113253064A (en) * | 2021-04-12 | 2021-08-13 | 广东电网有限责任公司广州供电局 | Method and device for detecting partial discharge of cable |
-
2018
- 2018-09-19 CN CN201821528242.8U patent/CN208833873U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113253064A (en) * | 2021-04-12 | 2021-08-13 | 广东电网有限责任公司广州供电局 | Method and device for detecting partial discharge of cable |
| CN112858859A (en) * | 2021-04-19 | 2021-05-28 | 江苏森海电气有限公司 | Crosslinked polyethylene power cable insulation monitoring device |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190507 Termination date: 20190919 |