CN111835149A - Mine hoisting system health state monitoring method based on main shaft measuring point strain - Google Patents
Mine hoisting system health state monitoring method based on main shaft measuring point strain Download PDFInfo
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- CN111835149A CN111835149A CN202010700840.4A CN202010700840A CN111835149A CN 111835149 A CN111835149 A CN 111835149A CN 202010700840 A CN202010700840 A CN 202010700840A CN 111835149 A CN111835149 A CN 111835149A
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- driving shaft
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000012544 monitoring process Methods 0.000 title claims abstract description 29
- 230000036541 health Effects 0.000 title claims abstract description 18
- 230000001681 protective effect Effects 0.000 claims description 19
- 230000008859 change Effects 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000012806 monitoring device Methods 0.000 abstract 1
- 230000003862 health status Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
- H02H7/0852—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load directly responsive to abnormal temperature by using a temperature sensor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/25—Devices for sensing temperature, or actuated thereby
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
- H02K11/35—Devices for recording or transmitting machine parameters, e.g. memory chips or radio transmitters for diagnosis
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/60—Controlling or determining the temperature of the motor or of the drive
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention relates to the technical field of mine hoisting systems, and discloses a mine hoisting system health state monitoring method based on main shaft measuring point strain. The mine hoisting system monitoring device has the advantages that the state of the driving shaft and the servo motor during rotation is automatically monitored, the driving shaft and the servo motor are prevented from continuously rotating when the load is too large, the probability of damage to the driving shaft and the servo motor due to the too large load is reduced, an operator can be conveniently reminded of the operation state of the mine hoisting system at the first time, the speed of the mine hoisting system during maintenance is increased, the protection effect of the mine hoisting system during use is improved, and the service life of the mine hoisting system is prolonged.
Description
Technical Field
The invention relates to the technical field of mine hoisting systems, in particular to a mine hoisting system health state monitoring method based on main shaft measuring point strain.
Background
The mine hoisting system hoists coal and gangue along a shaft, and hoists personnel and equipment, which are links for connecting a mine underground production system and a ground industrial square. The mine hoist is a key component of a mine hoisting system and plays an important role in the whole mine production.
At present, the existing mine hoisting system health state monitoring method based on main shaft measuring point strain has some defects, for example; the existing mine hoisting system based on main shaft measuring point strain can not monitor the state of a driving shaft and a servo motor when rotating, and the driving shaft and the servo motor can continue to rotate when being overloaded, so that the damage probability of the driving shaft and the servo motor due to the overload is improved, the operating state of the mine hoisting system can not be reminded to operators in the first time, the maintenance speed of the mine hoisting system is reduced, the protection effect of the mine hoisting system in the use process is reduced, and the service life of the mine hoisting system is shortened.
Disclosure of Invention
The invention aims to provide a mine hoisting system health state monitoring method based on main shaft measuring point strain, and solves the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a health state monitoring method of a mine hoisting system based on main shaft measuring point strain comprises a fixed table, wherein a supporting leg, a protective box, a fixed seat, a through groove and a servo motor are arranged on the fixed table, the supporting leg is fixedly connected with the bottom of the fixed table through a bolt, the protective box is fixedly connected with the left side of the upper surface of the fixed table through a screw, the fixed seat is fixedly connected with the upper surface of the fixed table through a screw and symmetrically arranged on two sides of the through groove, the through groove is positioned in the middle of the fixed table, the servo motor is fixedly connected with the right side of the upper surface of the fixed table through a screw, a hinge, a PLC (programmable logic controller) and a loudspeaker are arranged on the protective box, one end of the hinge is fixedly connected with the left side of the protective box through a screw, and the PLC is fixedly connected with the inside of the protective box through a screw, the loudspeaker pass through the screw with the inside upper wall fixed connection of guard box, the other end of hinge passes through screw fixed connection chamber door, the fixing base passes through the bearing and connects the driving shaft, the driving shaft passes through screw fixed connection line roller, the line roller passes through the hoist cable connection and promotes the frame, the PLC controller has temperature sensor, speed sensor and electromagnetic switch through wire electric connection.
As a preferred embodiment of the invention, the supporting legs are provided with four and are symmetrically arranged at four corners of the bottom of the fixed table.
As a preferred embodiment of the present invention, the through groove penetrates through the inside of the fixing table and corresponds to a position of the wire roller.
In a preferred embodiment of the present invention, one end of the driving shaft is fitted in the middle of the bearing and rotatably connected to the middle of the bearing.
As a preferred embodiment of the present invention, the outer ring of the bearing is fixedly connected to the inside of the fixing base by a screw, and both ends of the bearing are communicated with both sides of the fixing base.
As a preferred embodiment of the present invention, the temperature sensor passes through the outside of the fixed base and is fixedly connected to the left surface of the left driving shaft by a screw.
As a preferred embodiment of the present invention, an output end of the servo motor is rotatably connected to the driving shaft through a bearing and is electrically connected to the electromagnetic switch through a wire, and the rotation speed sensor is fixedly connected to a right end of the servo motor through a screw.
As a preferred embodiment of the present invention, the method for monitoring the health status of the mine hoisting system based on the strain of the spindle measuring point comprises the following monitoring steps:
a. firstly, respectively monitoring the temperature generated when the driving shaft rotates and the rotating speed of the servo motor by a temperature sensor and a rotating speed sensor;
b. after the step a is finished, when the temperature generated when the driving shaft rotates is higher than a preset value of a temperature sensor or the change of the rotating speed of a motor rotating shaft of the servo motor is large, the temperature sensor or the rotating speed sensor can transmit the detection result to the PLC;
c. and c, after the step b is finished, the PLC receives the information and then controls the electromagnetic switch to be switched off, so that the servo motor stops operating, and then the loudspeaker is controlled to give an alarm for reminding.
Compared with the prior art, the invention has the following beneficial effects:
when the invention is used, the temperature sensor and the rotating speed sensor respectively monitor the temperature generated when the driving shaft rotates and the rotating speed of the servo motor, when the temperature generated when the driving shaft rotates is higher than the preset value of the temperature sensor or the rotating speed change of the motor rotating shaft of the servo motor is large, the temperature sensor or the rotating speed sensor can transmit the detection result to the PLC controller, the PLC controller can control the electromagnetic switch to be switched off after receiving the information, so that the servo motor stops operating, and then the loudspeaker is controlled to alarm and remind, thereby realizing the automatic monitoring of the rotating state of the driving shaft and the servo motor, avoiding the driving shaft and the servo motor from continuing rotating when the load is overlarge, reducing the damage probability of the driving shaft and the servo motor due to overlarge load, and being convenient for reminding operators of the operating state of the mine hoisting system at the first time, the speed of the mine hoisting system during maintenance is accelerated, the protection effect of the mine hoisting system during use is improved, and the service life of the mine hoisting system is prolonged.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a front view of a mine hoist system health status monitoring method based on spindle measurement point strain in accordance with the present invention;
FIG. 2 is an internal view of a protective box of the mine hoisting system health status monitoring method based on main shaft measuring point strain according to the present invention;
FIG. 3 is a fixing base sectional view of a mine hoist system health status monitoring method based on spindle measurement point strain according to the present invention;
FIG. 4 is a control flow chart of the mine hoist system health status monitoring method based on the strain of the spindle measuring point.
In the figure: fixed station 1, supporting leg 2, guard box 3, fixing base 4, logical groove 5, servo motor 6, hinge 7, PLC controller 8, speaker 9, chamber door 10, bearing 11, driving shaft 12, line roller 13, hoist cable 14, promotion frame 15, temperature sensor 16, speed sensor 17, electromagnetic switch 18.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: a health state monitoring method of a mine hoisting system based on main shaft measuring point strain comprises a fixed table 1, wherein a supporting leg 2, a protective box 3, a fixed seat 4, a through groove 5 and a servo motor 6 are arranged on the fixed table 1, the supporting leg 2 is fixedly connected with the bottom of the fixed table 1 through a bolt, the protective box 3 is fixedly connected with the left side of the upper surface of the fixed table 1 through a screw, the fixed seat 4 is fixedly connected with the upper surface of the fixed table 1 through a screw and symmetrically arranged on two sides of the through groove 5, the through groove 5 is positioned in the middle of the fixed table 1, the servo motor 6 is fixedly connected with the right side of the upper surface of the fixed table 1 through a screw, a hinge 7, a PLC (programmable logic controller) 8 and a loudspeaker 9 are arranged on the protective box 3, one end of the hinge 7 is fixedly connected with the left side of the protective box 3 through a screw, PLC controller 8 through the screw with the inside fixed connection of protective housing 3, speaker 9 through the screw with the inside upper wall fixed connection of protective housing 3, screw fixed connection chamber door 10 is passed through to the other end of hinge 7, fixing base 4 passes through bearing 11 and connects driving shaft 12, driving shaft 12 passes through screw fixed connection line roller 13, line roller 13 passes through hoist cable 14 and connects promotion frame 15, PLC controller 8 has temperature sensor 16, tacho sensor 17 and electromagnetic switch 18 through wire electric connection.
Further, the supporting legs 2 are provided with four and symmetrically arranged at four corners of the bottom of the fixed station 1, and the function of the supporting legs is effective.
Further, the through groove 5 penetrates the inside of the fixing table 1, and functions to be effective in correspondence with the position of the wire roller 13.
Further, one end of the driving shaft 12 is fitted in the middle of the bearing 11 and rotatably connected to the middle of the bearing 11, which is effective.
Further, the outer ring of the bearing 11 is fixedly connected with the inside of the fixed seat 4 through a screw, and two ends of the bearing 11 are communicated with two sides of the fixed seat 4, so that the bearing is effective.
Further, the temperature sensor 16 passes through the outside of the fixed base 4 and is fixedly connected with the left surface of the driving shaft 12 through a screw, and the function thereof is effective.
Further, the output end of the servo motor 6 is rotatably connected with the driving shaft 12 through a bearing 11 and is electrically connected with the electromagnetic switch 18 through a lead, and the rotating speed sensor 17 is fixedly connected with the right end of the servo motor 6 through a screw and can be effective.
Further, the health state monitoring method of the mine hoisting system based on the strain of the spindle measuring point comprises the following monitoring steps:
a. firstly, a temperature sensor 16 and a rotating speed sensor 17 respectively monitor the temperature generated when the driving shaft 12 rotates and the rotating speed of the servo motor 6;
b. after the step a is finished, when the temperature generated when the driving shaft 12 rotates is higher than a preset value of the temperature sensor 16 or the change of the rotating speed of the motor rotating shaft of the servo motor 6 is large, the temperature sensor 16 or the rotating speed sensor 17 transmits the detection result to the PLC 8;
c. after the step b is finished, the PLC 8 receives the information and then controls the electromagnetic switch 18 to be switched off, so that the servo motor 6 stops operating, and then controls the loudspeaker 9 to give an alarm.
When the method for monitoring the health state of the mine hoisting system based on the strain of the spindle measuring point is used, firstly, the temperature sensor 16 and the rotating speed sensor 17 respectively monitor the temperature generated when the driving shaft 12 rotates and the rotating speed of the servo motor 6, when the temperature generated when the driving shaft 12 rotates is higher than a preset value of the temperature sensor 16 or the rotating speed change of a motor rotating shaft of the servo motor 6 is large, the temperature sensor 16 or the rotating speed sensor 17 can transmit the detection result to the PLC 8, the PLC 8 can control the electromagnetic switch 18 to be switched off after receiving the information, so that the servo motor 6 stops operating, and then the loudspeaker 9 is controlled to give an alarm.
The invention discloses a fixing table 1, supporting legs 2, a protective box 3, a fixing seat 4, a through groove 5, a servo motor 6, hinges 7, a PLC controller 8, a loudspeaker 9, a box door 10, a bearing 11, a driving shaft 12, a wire roller 13, a sling 14, a lifting frame 15, a temperature sensor 16, a rotating speed sensor 17, an electromagnetic switch 18 and other parts are all universal standard parts or parts known by technicians in the field, the structure and the principle of the parts can be known by technicians or conventional experimental methods, the invention realizes automatic monitoring of the rotating state of the driving shaft 12 and the servo motor 6, avoids continuous rotation of the driving shaft 12 and the servo motor 6 when the load is overlarge, reduces the damage probability of the driving shaft 12 and the servo motor 6 due to overlarge load, and is convenient for reminding the operators of the operating state of a mine lifting system at the first time, the speed of the mine hoisting system during maintenance is accelerated, the protection effect of the mine hoisting system during use is improved, and the service life of the mine hoisting system is prolonged.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. A mine hoisting system health state monitoring method based on main shaft measuring point strain comprises a fixed station (1) and is characterized in that: the supporting leg (2), the protective box (3), the fixing seat (4), the through groove (5) and the servo motor (6) are arranged on the fixing table (1), the supporting leg (2) is fixedly connected with the bottom of the fixing table (1) through a bolt, the protective box (3) is fixedly connected with the left side of the upper surface of the fixing table (1) through a screw, the fixing seat (4) is fixedly connected with the upper surface of the fixing table (1) through a screw and symmetrically arranged on two sides of the through groove (5), the through groove (5) is positioned in the middle of the fixing table (1), the servo motor (6) is fixedly connected with the right side of the upper surface of the fixing table (1) through a screw, a hinge (7), a PLC (8) and a loudspeaker (9) are arranged on the protective box (3), one end of the hinge (7) is fixedly connected with the left side of the protective box (3) through a screw, PLC controller (8) through the screw with the inside fixed connection of protective housing (3), speaker (9) through the screw with the inside upper wall fixed connection of protective housing (3), the other end of hinge (7) passes through screw fixed connection chamber door (10), driving shaft (12) is connected through bearing (11) in fixing base (4), driving shaft (12) are through screw fixed connection line roller (13), line roller (13) are through hoist cable (14) connection lifting frame (15), PLC controller (8) have temperature sensor (16), tachometer (17) and electromagnetic switch (18) through wire electric connection.
2. The method for monitoring the health state of the mine hoisting system based on the strain of the spindle measuring points as claimed in claim 1, wherein the method comprises the following steps: the supporting legs (2) are four and symmetrically arranged at four corners of the bottom of the fixed table (1).
3. The method for monitoring the health state of the mine hoisting system based on the strain of the spindle measuring points as claimed in claim 1, wherein the method comprises the following steps: the through groove (5) penetrates through the inside of the fixed table (1) and corresponds to the position of the wire roller (13).
4. The method for monitoring the health state of the mine hoisting system based on the strain of the spindle measuring points as claimed in claim 1, wherein the method comprises the following steps: one end of the driving shaft (12) is embedded in the middle of the bearing (11) and is rotatably connected with the middle of the bearing (11).
5. The method for monitoring the health state of the mine hoisting system based on the strain of the spindle measuring points as claimed in claim 1, wherein the method comprises the following steps: the outer ring of the bearing (11) is fixedly connected with the inside of the fixed seat (4) through a screw, and two ends of the bearing (11) are communicated with two sides of the fixed seat (4).
6. The method for monitoring the health state of the mine hoisting system based on the strain of the spindle measuring points as claimed in claim 1, wherein the method comprises the following steps: the temperature sensor (16) penetrates through the outside of the fixed seat (4) and is fixedly connected with the left surface of the driving shaft (12) through a screw.
7. The method for monitoring the health state of the mine hoisting system based on the strain of the spindle measuring points as claimed in claim 1, wherein the method comprises the following steps: the output end of the servo motor (6) is rotatably connected with the driving shaft (12) through a bearing (11) and is electrically connected with the electromagnetic switch (18) through a lead, and the rotating speed sensor (17) is fixedly connected with the right end of the servo motor (6) through a screw.
8. The method for monitoring the health state of the mine hoisting system based on the strain of the spindle measuring points as claimed in claim 1, wherein the method comprises the following steps: the monitoring steps are as follows:
a. firstly, a temperature sensor (16) and a rotating speed sensor (17) respectively monitor the temperature generated when a driving shaft (12) rotates and the rotating speed of a servo motor (6);
b. after the step a is finished, when the temperature generated when the driving shaft (12) rotates is higher than a preset value of the temperature sensor (16) or the change of the rotating speed of the motor rotating shaft of the servo motor (6) is large, the temperature sensor (16) or the rotating speed sensor (17) can transmit the detection result to the PLC (8);
c. and b, after the step b is finished, the PLC (8) receives the information and then controls the electromagnetic switch (18) to be switched off, so that the servo motor (6) stops operating, and then the loudspeaker (9) is controlled to give an alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010700840.4A CN111835149A (en) | 2020-07-20 | 2020-07-20 | Mine hoisting system health state monitoring method based on main shaft measuring point strain |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010700840.4A CN111835149A (en) | 2020-07-20 | 2020-07-20 | Mine hoisting system health state monitoring method based on main shaft measuring point strain |
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| CN111835149A true CN111835149A (en) | 2020-10-27 |
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| CN110775761A (en) * | 2019-10-22 | 2020-02-11 | 徐州立方机电设备制造有限公司 | Wireless real-time monitoring device for vertical shaft lifting container |
| CN110745442A (en) * | 2019-11-07 | 2020-02-04 | 上海速锐信息技术有限公司 | Synchronous vertical lifting system for stereoscopic warehouse |
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Application publication date: 20201027 |
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