CN109322667A - A kind of automatic protection prior-warning device and method applied in coalcutter Transient detection - Google Patents
A kind of automatic protection prior-warning device and method applied in coalcutter Transient detection Download PDFInfo
- Publication number
- CN109322667A CN109322667A CN201811570427.XA CN201811570427A CN109322667A CN 109322667 A CN109322667 A CN 109322667A CN 201811570427 A CN201811570427 A CN 201811570427A CN 109322667 A CN109322667 A CN 109322667A
- Authority
- CN
- China
- Prior art keywords
- coalcutter
- current
- vibratory output
- fpga unit
- current value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/24—Remote control specially adapted for machines for slitting or completely freeing the mineral
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/04—Safety devices
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The present invention provides a kind of automatic protection prior-warning device and method applied in coalcutter Transient detection, and current sensor incudes the current value of cutting motor power line, and the current value of induction is transferred to FPGA unit；Vibrating sensor is used to incude the vibratory output of coalcutter cutting head, and the vibratory output of induction is transferred to FPGA unit；FPGA unit is used to obtain the vibratory output threshold value of coalcutter cutting head and the current threshold of cutting motor power line, and received current value is compared with current threshold, also received vibratory output is compared with vibratory output threshold value；When received current value exceeds threshold value beyond vibratory output threshold value or received current value and vibratory output beyond current threshold or received vibratory output, to coalcutter PLC module alert.With detection accuracy height, the advantages such as range is big, frequency is high are vibrated, can realize the real-time monitoring to oscillation intensity and vibration frequency in coal machine working condition well.
Description
Technical field
The present invention relates to coalcutter technical field more particularly to a kind of apply the automatic protection in coalcutter Transient detection pre-
Alarm device and method.
Background technique
When mine silo shearer cutting head operation, top beam or other hard iron ores are visited before often encountering hydraulic prop
Deng, the pick on coal machine cutting head is very easy to damage at this time, and hoistway supporting brandreth and main motor also will receive certain damage, from
And it will affect security performance and coal mining efficiency.It is directed to this problem at present, main use monitors main motor coil current size
Method to judge whether that cutting is abnormal indirectly, and for current value generally using conventional mutual inductor detection, this detection mode has speed
Distinct disadvantages, the protecting effects being finally reached such as the slow, low precision of degree are lower.
Summary of the invention
In order to overcome the deficiencies in the prior art described above, the present invention provides a kind of apply in the automatic of coalcutter Transient detection
Protect prior-warning device, comprising: current sensor, vibrating sensor and FPGA unit；
Current sensor and vibrating sensor are connect with FPGA unit respectively；FPGA unit is connect with coalcutter PLC module；
Current sensor is arranged on coalcutter cutting motor power line, and current sensor is for incuding cutting motor power line
Current value, and the current value of induction is transferred to FPGA unit；
Vibrating sensor is arranged close to coalcutter cutting head, and vibrating sensor is used to incude the vibratory output of coalcutter cutting head, and
The vibratory output of induction is transferred to FPGA unit；
FPGA unit is used to obtain the vibratory output threshold value of coalcutter cutting head and the current threshold of cutting motor power line, will connect
The current value of receipts is compared with current threshold, and also received vibratory output is compared with vibratory output threshold value；
When received current value beyond current threshold or received vibratory output beyond vibratory output threshold value or received current value and
When vibratory output exceeds threshold value, to coalcutter PLC module alert.
Preferably, current sensor includes: Rogowski coil and current acquisition integrator；Rogowski coil is looped around coal mining machine-cut
It cuts in the motor line of force, when flowing through electric current on power line, the electric current that Rogowski coil induces passes through current acquisition integrator quilt
Acquisition, the current value of acquisition are transmitted to FPGA unit.
Preferably, coalcutter is provided with multiple cutting motors, and each cutting motor is provided with current sensor；
Coalcutter is provided with multiple cutting heads, and each cutting head is provided with vibrating sensor；
FPGA unit is also used to when the current value of any cutting motor power line of coalcutter is beyond threshold value, to coalcutter PLC
Module alert；
When the vibratory output of any cutting head of coalcutter exceeds threshold value, to coalcutter PLC module alert.
Preferably, FPGA unit is communicated to connect using CAN2.0 communication modes and coalcutter PLC module.
Preferably, FPGA unit includes: FPGA processor, AD converter, power module and communication module；
FPGA processor is connect with current sensor and vibrating sensor respectively by AD converter；
FPGA processor is communicated to connect by communication module and coalcutter PLC module；
Power module is used to power to FPGA unit internal module, and the voltage of confession is carried out to hand over straight conversion, transformation and pressure stabilizing.
Preferably, vibrating sensor uses KS74C10 model sensor.
A kind of automatic protection method for early warning applied in coalcutter Transient detection, method include:
Current sensor incudes the current value of cutting motor power line, and the current value of induction is transferred to FPGA unit；
Vibrating sensor incudes the vibratory output of coalcutter cutting head, and the vibratory output of induction is transferred to FPGA unit；
FPGA unit obtains the vibratory output threshold value of coalcutter cutting head and the current threshold of cutting motor power line；
Received current value is compared FPGA unit with current threshold, also carries out received vibratory output and vibratory output threshold value
It compares；
When received current value beyond current threshold or received vibratory output beyond vibratory output threshold value or received current value and
When vibratory output exceeds threshold value, to coalcutter PLC module alert.
Preferably, method further include:
Rogowski coil is looped around on coalcutter cutting motor power line, and when flowing through electric current on power line, Rogowski coil is induced
Electric current it is collected by current acquisition integrator, the current value of acquisition is transmitted to FPGA unit.
Preferably, method further include:
FPGA unit obtains the coalcutter enabling signal that coalcutter PLC module issues；
FPGA unit judges the current value for whether having induction on coalcutter cutting motor power line；
When FPGA unit receives the current value on coalcutter cutting motor power line, by received current value and current threshold
It is compared, judges whether superthreshold；
If exceeding threshold value, electric current superthreshold warning message is issued to coalcutter PLC module；
When coalcutter PLC module persistently receives in preset duration beyond threshold information, the control cutting of coalcutter PLC module
Motor is out of service.
Preferably, method further include:
If the current value on coalcutter cutting motor power line is without departing from threshold value, cutting motor starting operation, vibrating sensor
Incude the vibratory output of coalcutter cutting head, and the vibratory output of induction is transferred to FPGA unit；
Received vibratory output is compared FPGA unit with vibratory output threshold value；If exceeding threshold value, sent out to coalcutter PLC module
Vibratory output superthreshold warning message out；
When coalcutter PLC module persistently receives in preset duration beyond threshold information, the control cutting of coalcutter PLC module
Motor is out of service.
As can be seen from the above technical solutions, the invention has the following advantages that
In the present invention, current sensor uses flexible Luo-coil current detecting, has the advantages such as detection accuracy is high, speed is fast,
Effective detection to coal cutting motor transient dash current, fuselage main body when vibrating sensor incudes the work of coal machine can be realized well
Vibration frequency and oscillation intensity, and it is converted into analog voltage signal in specific proportions.The present invention has detection accuracy
Height vibrates the advantages such as range is big, frequency is high, can realize well to the oscillation intensity and vibration frequency in coal machine working condition
Real-time monitoring can issue reminding alarm in time once there is superthreshold situation, avoid failure propagation, influence to mine.
Detailed description of the invention
In order to illustrate more clearly of technical solution of the present invention, attached drawing needed in description will be made below simple
Ground introduction, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ordinary skill
For personnel, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the automatic protection prior-warning device schematic diagram applied in coalcutter Transient detection；
Fig. 2 is the automatic protection prior-warning device embodiment schematic diagram applied in coalcutter Transient detection；
Fig. 3 is the automatic protection prior-warning device embodiment schematic diagram applied in coalcutter Transient detection.
Specific embodiment
The present invention provides a kind of automatic protection prior-warning device applied in coalcutter Transient detection, as shown in Figure 1, comprising:
Current sensor 1, vibrating sensor 2 and FPGA unit 3；
Current sensor 1 and vibrating sensor 2 are connect with FPGA unit 3 respectively；FPGA unit 3 and coalcutter PLC module 4 connect
It connects；
Current sensor 1 is arranged on coalcutter cutting motor power line 13, and current sensor 1 is for incuding cutting motor power
The current value of line, and the current value of induction is transferred to FPGA unit 3；
Vibrating sensor 2 is arranged close to coalcutter cutting head, and vibrating sensor 2 is used to incude the vibratory output of coalcutter cutting head,
And the vibratory output of induction is transferred to FPGA unit 3；
FPGA unit 3 is used to obtain the vibratory output threshold value of coalcutter cutting head and the current threshold of cutting motor power line, will
Received current value is compared with current threshold, and also received vibratory output is compared with vibratory output threshold value；
When received current value beyond current threshold or received vibratory output beyond vibratory output threshold value or received current value and
When vibratory output exceeds threshold value, to 4 alert of coalcutter PLC module.
Technology as described herein may be implemented in hardware, software, firmware or any combination of them.The various spies
Sign is module, and unit or assembly may be implemented together in integration logic device or separately as discrete but interoperable logic
Device or other hardware devices.In some cases, the various features of electronic circuit may be implemented as one or more integrated
Circuit devcie, such as IC chip or chipset.
It in order to make the invention's purpose, features and advantages of the invention more obvious and easy to understand, below will be with specific
Examples and drawings, the technical solution protected to the present invention are clearly and completely described, it is clear that implementation disclosed below
Example is only a part of the embodiment of the present invention, and not all embodiment.Based on the embodiment in this patent, the common skill in this field
Art personnel all other embodiment obtained without making creative work belongs to the model of this patent protection
It encloses.
In embodiment provided by the invention, as shown in Fig. 2, current sensor 1 includes: Rogowski coil 11 and current acquisition product
Divide device 12；Rogowski coil 11 is looped around on 15 power line 13 of coalcutter cutting motor, when flowing through electric current on power line, Roche line
The electric current that circle 11 induces is collected by current acquisition integrator 12, and the current value of acquisition is transmitted to FPGA unit 3.
In embodiment provided by the invention, as shown in figure 3, coalcutter 9 is provided with multiple cutting motors, each cutting motor
It is provided with current sensor 1；Coalcutter is provided with multiple cutting heads, and each cutting head is provided with vibrating sensor 2；FPGA
Unit 3 is also used to send out when the current value of any cutting motor power line of coalcutter is beyond threshold value to coalcutter PLC module 4
Warning message out；When the vibratory output of any cutting head of coalcutter exceeds threshold value, alarm signal is issued to coalcutter PLC module 4
Breath.
FPGA unit 3 is communicated to connect using CAN2.0 communication modes and coalcutter PLC module 4.FPGA unit 3 includes:
FPGA processor 6, AD converter 5, power module 8 and communication module 7；FPGA processor 6 by AD converter 5 respectively with electricity
Flow sensor 1 and vibrating sensor 2 connect；FPGA processor 6 is communicated to connect by communication module 7 and coalcutter PLC module 4；
Power module 8 is used to power to 3 internal module of FPGA unit, and the voltage of confession is carried out to hand over straight conversion, transformation and pressure stabilizing.Vibration
Dynamic sensor 2 uses KS74C10 model sensor.
The computer program product of computer-readable medium can form a part, may include packaging material.Data
Computer-readable medium may include computer storage medium, such as random access memory (RAM), read-only memory
(ROM), nonvolatile RAM (NVRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), flash memory, magnetic or
Optical data carrier and analog.In some embodiments, a kind of manufacture product may include that one or more computers can
Read storage media.
It includes that one or more processors execute that the code or instruction, which can be software and/or firmware by processing circuit,
Such as one or more digital signal processors (DSP), general purpose microprocessor, application-specific integrated circuit (ASICs), scene can be compiled
Journey gate array (FPGA) or other equivalents are integrated circuit or discrete logic.Therefore, term " processor, " due to
It can refer to that any aforementioned structure or any other structure are more suitable for the technology as described herein realized as used herein.Separately
Outside, in some respects, function described in the disclosure can be provided in software module and hardware module.
System uses FPGA for core using real-time detection transient current data and coal mining fuselage vibratory output data respectively
Main control unit, to the particular algorithm that current curve is combined with oscillating curve so that coalcutter cutting head encounter supporting brandreth or
It can effective automatic protection early warning effect when other hard iron ores.
The present invention also provides a kind of automatic protection method for early warning applied in coalcutter Transient detection, method includes:
Current sensor incudes the current value of cutting motor power line, and the current value of induction is transferred to FPGA unit；
Vibrating sensor incudes the vibratory output of coalcutter cutting head, and the vibratory output of induction is transferred to FPGA unit；
FPGA unit obtains the vibratory output threshold value of coalcutter cutting head and the current threshold of cutting motor power line；
Received current value is compared FPGA unit with current threshold, also carries out received vibratory output and vibratory output threshold value
It compares；
When received current value beyond current threshold or received vibratory output beyond vibratory output threshold value or received current value and
When vibratory output exceeds threshold value, to coalcutter PLC module alert.
Method may be achieved in many ways method and device of the invention.For example, can be by software, hardware, solid
Part or software, hardware, firmware any combination realize method and device of the invention.The step of for the method
Said sequence is merely to be illustrated, and the step of method of the invention is not limited to sequence described in detail above, unless with it
Its mode illustrates.In addition, in some embodiments, the present invention can be also embodied as recording program in the recording medium,
These programs include for realizing machine readable instructions according to the method for the present invention.Thus, the present invention also covers storage and is used for
Execute the recording medium of program according to the method for the present invention.
In this method, Rogowski coil is looped around on coalcutter cutting motor power line, when flowing through electric current on power line, sieve
The coil-induced electric current out of family name is collected by current acquisition integrator, and the current value of acquisition is transmitted to FPGA unit.
In this method, FPGA unit obtains the coalcutter enabling signal that coalcutter PLC module issues；
FPGA unit judges the current value for whether having induction on coalcutter cutting motor power line；
When FPGA unit receives the current value on coalcutter cutting motor power line, by received current value and current threshold
It is compared, judges whether superthreshold；
If exceeding threshold value, electric current superthreshold warning message is issued to coalcutter PLC module；
When coalcutter PLC module persistently receives in preset duration beyond threshold information, the control cutting of coalcutter PLC module
Motor is out of service.
Method further include: if the current value on coalcutter cutting motor power line is without departing from threshold value, cutting motor starting
Operation, vibrating sensor incude the vibratory output of coalcutter cutting head, and the vibratory output of induction is transferred to FPGA unit；
Received vibratory output is compared FPGA unit with vibratory output threshold value；If exceeding threshold value, sent out to coalcutter PLC module
Vibratory output superthreshold warning message out；
When coalcutter PLC module persistently receives in preset duration beyond threshold information, the control cutting of coalcutter PLC module
Motor is out of service.
Current sensor incudes the transient current on two coal machine cutting motor operation power lines in method, and by it by spy
Certainty ratio is converted to analog voltage signal.In present embodiment, current sensor uses flexible Luo-coil current detecting, has
The advantages such as detection accuracy is high, speed is fast, can realize effective detection to coal cutting motor transient dash current, the vibration well
The vibration frequency and oscillation intensity of fuselage main body when dynamic sensor is used to incude the work of coal machine, and it is converted in specific proportions
For analog voltage signal.In present embodiment, vibrating sensor uses KS74C10 model sensor, uses German MMF superelevation
Frequency technical grade acceleration transducer detection mode has the advantages such as detection accuracy is high, vibration range is big, frequency is high, can be well
Realize the real-time monitoring to oscillation intensity and vibration frequency in coal machine working condition.
When flowing through electric current on power line, the electric current that Rogowski coil induces is collected by current acquisition integrator, vibration
Dynamic sensor is placed in coal mining machine electric control box, built-in highly sensitive high-range acceleration transducer, when coalcutter work, is generated
Mechanical movement acceleration be just built acceleration transducer perception, be then reacted to vibratory output, FPGA is placed in electric cabinet,
Two current sensors of acquisition and vibration sensor signal, the method combined using current curve with oscillating curve are comprehensive in real time
The working condition for judging coalcutter cutting head is closed, while using CAN2.0 communication modes and PLC signal interaction, reaching timely guarantor
Protect the effect of coalcutter cutting head.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of automatic protection prior-warning device applied in coalcutter Transient detection characterized by comprising current sensor,
Vibrating sensor and FPGA unit；
Current sensor and vibrating sensor are connect with FPGA unit respectively；FPGA unit is connect with coalcutter PLC module；
Current sensor is arranged on coalcutter cutting motor power line, and current sensor is for incuding cutting motor power line
Current value, and the current value of induction is transferred to FPGA unit；
Vibrating sensor is arranged close to coalcutter cutting head, and vibrating sensor is used to incude the vibratory output of coalcutter cutting head, and
The vibratory output of induction is transferred to FPGA unit；
FPGA unit is used to obtain the vibratory output threshold value of coalcutter cutting head and the current threshold of cutting motor power line, will connect
The current value of receipts is compared with current threshold, and also received vibratory output is compared with vibratory output threshold value；
When received current value beyond current threshold or received vibratory output beyond vibratory output threshold value or received current value and
When vibratory output exceeds threshold value, to coalcutter PLC module alert.
2. the automatic protection prior-warning device according to claim 1 applied in coalcutter Transient detection, which is characterized in that
Current sensor includes: Rogowski coil and current acquisition integrator；Rogowski coil is looped around coalcutter cutting motor power
On line, when flowing through electric current on power line, the electric current that Rogowski coil induces is collected by current acquisition integrator, acquisition
Current value is transmitted to FPGA unit.
3. the automatic protection prior-warning device according to claim 1 or 2 applied in coalcutter Transient detection, feature exist
In,
Coalcutter is provided with multiple cutting motors, and each cutting motor is provided with current sensor；
Coalcutter is provided with multiple cutting heads, and each cutting head is provided with vibrating sensor；
FPGA unit is also used to when the current value of any cutting motor power line of coalcutter is beyond threshold value, to coalcutter PLC
Module alert；
When the vibratory output of any cutting head of coalcutter exceeds threshold value, to coalcutter PLC module alert.
4. the automatic protection prior-warning device according to claim 1 or 2 applied in coalcutter Transient detection, feature exist
In,
FPGA unit is communicated to connect using CAN2.0 communication modes and coalcutter PLC module.
5. the automatic protection prior-warning device according to claim 1 or 2 applied in coalcutter Transient detection, feature exist
In,
FPGA unit includes: FPGA processor, AD converter, power module and communication module；
FPGA processor is connect with current sensor and vibrating sensor respectively by AD converter；
FPGA processor is communicated to connect by communication module and coalcutter PLC module；
Power module is used to power to FPGA unit internal module, and the voltage of confession is carried out to hand over straight conversion, transformation and pressure stabilizing.
6. the automatic protection prior-warning device according to claim 1 or 2 applied in coalcutter Transient detection, feature exist
In,
Vibrating sensor uses KS74C10 model sensor.
7. a kind of automatic protection method for early warning applied in coalcutter Transient detection, which is characterized in that method includes:
Current sensor incudes the current value of cutting motor power line, and the current value of induction is transferred to FPGA unit；
Vibrating sensor incudes the vibratory output of coalcutter cutting head, and the vibratory output of induction is transferred to FPGA unit；
FPGA unit obtains the vibratory output threshold value of coalcutter cutting head and the current threshold of cutting motor power line；
Received current value is compared FPGA unit with current threshold, also carries out received vibratory output and vibratory output threshold value
It compares；
When received current value beyond current threshold or received vibratory output beyond vibratory output threshold value or received current value and
When vibratory output exceeds threshold value, to coalcutter PLC module alert.
8. the automatic protection method for early warning according to claim 7 applied in coalcutter Transient detection, which is characterized in that side
Method further include:
Rogowski coil is looped around on coalcutter cutting motor power line, and when flowing through electric current on power line, Rogowski coil is induced
Electric current it is collected by current acquisition integrator, the current value of acquisition is transmitted to FPGA unit.
9. the automatic protection method for early warning according to claim 7 applied in coalcutter Transient detection, which is characterized in that side
Method further include:
FPGA unit obtains the coalcutter enabling signal that coalcutter PLC module issues；
FPGA unit judges the current value for whether having induction on coalcutter cutting motor power line；
When FPGA unit receives the current value on coalcutter cutting motor power line, by received current value and current threshold
It is compared, judges whether superthreshold；
If exceeding threshold value, electric current superthreshold warning message is issued to coalcutter PLC module；
When coalcutter PLC module persistently receives in preset duration beyond threshold information, the control cutting of coalcutter PLC module
Motor is out of service.
10. the automatic protection method for early warning according to claim 9 applied in coalcutter Transient detection, which is characterized in that
Method further include:
If the current value on coalcutter cutting motor power line is without departing from threshold value, cutting motor starting operation, vibrating sensor
Incude the vibratory output of coalcutter cutting head, and the vibratory output of induction is transferred to FPGA unit；
Received vibratory output is compared FPGA unit with vibratory output threshold value；If exceeding threshold value, sent out to coalcutter PLC module
Vibratory output superthreshold warning message out；
When coalcutter PLC module persistently receives in preset duration beyond threshold information, the control cutting of coalcutter PLC module
Motor is out of service.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811570427.XA CN109322667A (en) | 2018-12-19 | 2018-12-19 | A kind of automatic protection prior-warning device and method applied in coalcutter Transient detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811570427.XA CN109322667A (en) | 2018-12-19 | 2018-12-19 | A kind of automatic protection prior-warning device and method applied in coalcutter Transient detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109322667A true CN109322667A (en) | 2019-02-12 |
Family
ID=65256932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811570427.XA Pending CN109322667A (en) | 2018-12-19 | 2018-12-19 | A kind of automatic protection prior-warning device and method applied in coalcutter Transient detection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109322667A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE32463E (en) * | 1975-03-10 | 1987-07-28 | Norton Christensen, Inc. | Method of and apparatus for telemetering information from a point in a well borehole to the earth's surface |
| CN2797746Y (en) * | 2005-04-18 | 2006-07-19 | 三一重型装备有限公司 | Means for protecting tracting unit of coal mining machine |
| CN102262179A (en) * | 2011-04-19 | 2011-11-30 | 重庆大学 | Unipolar current-voltage integration sensor |
| CN108426607A (en) * | 2018-03-15 | 2018-08-21 | 山东里能鲁西矿业有限公司 | A kind of automatic warning device and method of coalcutter Transient detection |
-
2018
- 2018-12-19 CN CN201811570427.XA patent/CN109322667A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE32463E (en) * | 1975-03-10 | 1987-07-28 | Norton Christensen, Inc. | Method of and apparatus for telemetering information from a point in a well borehole to the earth's surface |
| CN2797746Y (en) * | 2005-04-18 | 2006-07-19 | 三一重型装备有限公司 | Means for protecting tracting unit of coal mining machine |
| CN102262179A (en) * | 2011-04-19 | 2011-11-30 | 重庆大学 | Unipolar current-voltage integration sensor |
| CN108426607A (en) * | 2018-03-15 | 2018-08-21 | 山东里能鲁西矿业有限公司 | A kind of automatic warning device and method of coalcutter Transient detection |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103713217B (en) | The on-line monitoring method of Operation Condition of Power Transformers under a kind of Direct Current Bias | |
| CN104549979B (en) | Based on phase-shifting full-bridge high-power ultrasound generator | |
| CN104716522B (en) | Intelligent temporary ground wire | |
| CN106033201A (en) | Wearable equipment and electric tool | |
| CN103235568B (en) | A kind of nuclear power plant equipment condition monitoring wireless detection device | |
| CN104280683A (en) | Mechanical fault monitoring device for power transformer motor and fan | |
| CN109322667A (en) | A kind of automatic protection prior-warning device and method applied in coalcutter Transient detection | |
| CN104827929B (en) | The control method and device of electric automobile | |
| CN108426607A (en) | A kind of automatic warning device and method of coalcutter Transient detection | |
| CN203402849U (en) | Radar collision-avoidance device of portal crane | |
| CN202937433U (en) | Diaphragm pump failure warning system based on vibration detection | |
| US20150102805A1 (en) | Intelligent train wheel sensor | |
| CN207434912U (en) | Bridge construction tower crane safety monitoring system based on Internet of Things | |
| CN104834255A (en) | Large-power rectification cabinet water-cooled bus real-time monitoring system | |
| CN104697734A (en) | Method for detecting strip breaking fault of rotor of cage type sensing motor based on vibration signal and method for implementing method | |
| CN108152524A (en) | A kind of Hall wheel detector and its method of work | |
| CN202350904U (en) | Integrated vibration transmitter | |
| CN203310850U (en) | Signal conditioning device of mining vibration acceleration sensor | |
| CN204203259U (en) | A kind of magneto-electric tachogenerator and performance testing device thereof | |
| CN103033658A (en) | Electric meter box with alarm | |
| CN202255643U (en) | Monitoring protection device for rotary machinery | |
| CN201945601U (en) | Intelligent velocity measuring device for railway trains | |
| CN207407930U (en) | A kind of fruits and vegetables transport monitoring system | |
| CN208296919U (en) | A kind of contactless no magnetic tamper detection device for gauge table | |
| CN205677754U (en) | A kind of high water head large capacity hydroelectric generator group vibration throw protection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190212 |