CN108840191A - Sideslip monitoring device - Google Patents
Sideslip monitoring device Download PDFInfo
- Publication number
- CN108840191A CN108840191A CN201810886083.7A CN201810886083A CN108840191A CN 108840191 A CN108840191 A CN 108840191A CN 201810886083 A CN201810886083 A CN 201810886083A CN 108840191 A CN108840191 A CN 108840191A
- Authority
- CN
- China
- Prior art keywords
- resistance
- sideslip
- steel band
- photo resistance
- composite steel
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0006—Monitoring devices or performance analysers
- B66B5/0018—Devices monitoring the operating condition of the elevator system
- B66B5/0031—Devices monitoring the operating condition of the elevator system for safety reasons
Landscapes
- Indicating And Signalling Devices For Elevators (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
- Elevator Control (AREA)
Abstract
The present invention discloses a kind of sideslip monitoring device, including：At least a pair of of photo resistance, each pair of photo resistance includes being separately positioned on first photo resistance and the second photo resistance on the left side and the right of the composite steel band of elevator；Electric resistance measuring apparatus is adapted to detect for the resistance value of the first and second photo resistance；With sideslip judgment means, suitable for judged according to the resistance value detected composite steel band whether sideslip.When composite steel band is in correct operating position, the photosensitive surface of the first and second photo resistance is blocked completely by composite steel band.When composite steel band deviates its correct operating position, at least part of one photosensitive surface in the first and second photo resistance is not blocked by composite steel band, another photosensitive surface is blocked completely by composite steel band.Sideslip monitoring device of the invention can detect and monitor in real time composite steel band whether sideslip, therefore, the security performance of the elevator greatly improved.
Description
Technical field
The present invention relates to a kind of sideslip monitoring devices, more particularly to a kind of clad steel for capableing of real-time detection and monitoring elevator
Band whether the sideslip monitoring device of sideslip.
Background technique
Elevator generally includes carriage, counterweight, composite steel band and traction machine, and composite steel band is for drawing carriage and counterweight.It is multiple
It closes steel band and traction sheave is frictionally engaged, therefore, traction machine can drive composite steel band mobile.In order to reduce the traction of traction machine
Power is connected with counterweight diversion sheave (movable pulley) on composite steel band.Due to that can have some deviations when elevator is installed, this can be led
Composite steel band is caused to be easy its correct operating position (or being sideslip) of offset.When composite steel band sideslip, composite steel band can be from
It is jumped out in the race of traction sheave or counterweight diversion sheave, this can cause to be seriously worn to composite steel band.Once composite steel band is excessively ground
Damage has the danger for causing fracture, seriously threatens the safe operation of elevator.In order to guarantee elevator safety operation, it is necessary to artificial regular
Check composite steel band whether sideslip.But artificially inspect periodically composite steel band whether sideslip be not only very time-consuming, but also cannot and
Shi Faxian composite steel band sideslip, however it remains biggish security risk.
Summary of the invention
The purpose of the present invention aims to solve the problem that at least one aspect of the above-mentioned problems in the prior art and defect.
According to an aspect of the present invention, a kind of sideslip monitoring device is provided, suitable for real-time detection and monitors answering for elevator
Close steel band whether sideslip.The sideslip monitoring device includes：At least a pair of of photo resistance, each pair of photo resistance include first photosensitive
Resistance and the second photo resistance, first photo resistance are arranged in the left side in the width direction of composite steel band, and described second
The right in the width direction of composite steel band is arranged in photo resistance；Electric resistance measuring apparatus, with first photo resistance and institute
The second photo resistance electrical connection is stated, the resistance value of first photo resistance and second photo resistance is adapted to detect for；And race
Inclined judgment means are electrically connected with the electric resistance measuring apparatus, suitable for according to first photo resistance that detects and described the
The resistance value of two photo resistance come judge the composite steel band whether sideslip.When the composite steel band is in correct operating position
When, the photosensitive surface of first photo resistance and second photo resistance is in face of the composite steel band and by the clad steel
Band blocks completely.When the composite steel band deviates its correct operating position, first photo resistance and second light
At least part of one photosensitive surface in quick resistance is not blocked by the composite steel band, another photosensitive surface quilt
The composite steel band blocks completely.
The embodiment of an exemplary according to the present invention, when detecting first photo resistance and described second photosensitive
When one resistance value in resistance is lower than predetermined threshold, it is correct that the sideslip judgment means determine that the composite steel band deviates it
Operating position.
The embodiment of another exemplary according to the present invention, when detecting first photo resistance and second light
One resistance value in quick resistance is lower than predetermined threshold and when another resistance value is higher than the predetermined threshold, the race
Inclined judgment means determine that the composite steel band deviates its correct operating position.
The embodiment of another exemplary according to the present invention, the sideslip monitoring device further includes deflection warning device,
The deflection warning device is electrically connected with the sideslip judgment means；When the sideslip judgment means determine the clad steel band-offset
When moving its correct operating position, the deflection warning device sounds an alarm in time.
The embodiment of another exemplary according to the present invention, when the composite steel band is in correct operating position,
The resistance value of first photo resistance and second photo resistance is equal to first resistor value, and the first resistor value is higher than institute
State predetermined threshold.
The embodiment of another exemplary according to the present invention, when the composite steel band deviates its correct operating position
When, one resistance value in first photo resistance and second photo resistance is lower than the predetermined threshold, another
Resistance value be equal to the first resistor value.
The embodiment of another exemplary according to the present invention, when the composite steel band deviates to the left, first light
The resistance value of quick resistance is lower than the predetermined threshold, and the resistance value of second photo resistance is equal to the first resistor value.
The embodiment of another exemplary according to the present invention, when the composite steel band deviates to the right, second light
The resistance value of quick resistance is lower than the predetermined threshold, and the resistance value of first photo resistance is equal to the first resistor value.
The embodiment of another exemplary according to the present invention, at least one in the traction sheave and counterweight diversion sheave of elevator
A place is provided with one or more pairs of photo resistance.
The embodiment of another exemplary according to the present invention is provided with one or more pairs of at the traction sheave of the elevator
The photo resistance；And one or more pairs of photo resistance are provided at the counterweight diversion sheave of the elevator.
The embodiment of another exemplary according to the present invention, the sideslip monitoring device further includes mounting plate, the peace
Loading board is fixed on the traction machine of the elevator or the mounting rack of counterweight, and the photo resistance is fixed on the mounting plate.
The embodiment of another exemplary according to the present invention, the electric resistance measuring apparatus are arranged on the mounting plate,
The pin of the photo resistance is electrically connected to the electric resistance measuring apparatus.
The embodiment of another exemplary according to the present invention, the mounting plate are circuit board, the electric resistance measuring apparatus
For the resistance detecting circuit being formed on the circuit board.
The embodiment of another exemplary according to the present invention, the sideslip judgment means are arranged on the circuit board,
And it is electrically connected by the conductive trace on the circuit board with the electric resistance measuring apparatus.
In the embodiment of aforementioned each exemplary of the invention, sideslip monitoring device can detect and monitor in real time multiple
Close steel band whether sideslip, therefore, the security performance of the elevator greatly improved.
By the description made for the present invention of below with reference to attached drawing, other objects and advantages of the present invention will be aobvious and easy
See, and can help that complete understanding of the invention will be obtained.
Detailed description of the invention
Fig. 1 shows the schematic diagram of the elevator of the embodiment of an exemplary according to the present invention；
Fig. 2 shows the schematic diagram of the sideslip monitoring device of the embodiment of an exemplary according to the present invention；
Fig. 3 shows the stereoscopic schematic diagram of the photo resistance of sideslip monitoring device shown in Fig. 2.
Specific embodiment
Below with reference to the embodiments and with reference to the accompanying drawing the technical solutions of the present invention will be further described.Illustrating
In book, the same or similar drawing reference numeral indicates the same or similar component.Following reference attached drawings are to embodiment of the present invention
Illustrate to be intended to explain present general inventive concept of the invention, and is not construed as to a kind of limitation of the invention.
In addition, in the following detailed description, to elaborate many concrete details to provide to present disclosure convenient for explaining
The comprehensive understanding of embodiment.It should be apparent, however, that one or more embodiments without these specific details can also be with
It is carried out.In other cases, well known construction and device is diagrammatically embodied to simplify attached drawing.
General technical design according to the present invention, provides a kind of sideslip monitoring device, is suitable for real-time detection and monitoring
The composite steel band of elevator whether sideslip, the sideslip monitoring device includes：At least a pair of of photo resistance, each pair of photo resistance include
The left side in the width direction of composite steel band is arranged in first photo resistance and the second photo resistance, first photo resistance,
The right in the width direction of composite steel band is arranged in second photo resistance；Electric resistance measuring apparatus, it is photosensitive with described first
Resistance and second photo resistance electrical connection, are adapted to detect for the resistance of first photo resistance and second photo resistance
Value；With sideslip judgment means, be electrically connected with the electric resistance measuring apparatus, suitable for according to first photo resistance that detects and
The resistance value of second photo resistance come judge the composite steel band whether sideslip.When the composite steel band is in correct work
When making position, the photosensitive surface of first photo resistance and second photo resistance is in face of the composite steel band and described
Composite steel band blocks completely.When the composite steel band deviates its correct operating position, first photo resistance and described
At least part of one photosensitive surface in second photo resistance is not blocked by the composite steel band, another photosensitive
It is blocked completely by the composite steel band on surface.
Fig. 1 shows the schematic diagram of the elevator of the embodiment of an exemplary according to the present invention；
As shown in Figure 1, in the illustrated embodiment, which mainly includes control system 100, traction machine 200, brake
210, carriage 300, counterweight 400 and composite steel band 500.Traction machine 200 is for driving carriage 300 mobile, and brake 210 is for stopping
Only carriage 300.Brake 210 applies braking moment on the output shaft of traction machine 200, guarantees the output shaft of traction machine 200 not
Rotation, so as to keep carriage 300 slack.
As shown in Figure 1, in the illustrated embodiment, the traction sheave 10 of composite steel band 500 and traction machine 200 is frictionally engaged,
Therefore, traction machine 200 can drive composite steel band 500 mobile.In order to reduce the driving force of traction machine 200, in composite steel band 500
On be connected with counterweight diversion sheave (movable pulley) 20.
As shown in Figure 1, in the illustrated embodiment, due to that can have some deviations when elevator is installed, this will lead to multiple
It closes steel band 500 and is easy its correct operating position (or being sideslip) of offset.When 500 sideslip of composite steel band, composite steel band 500
It can be jumped out from the race 11,12 of traction sheave 10 or counterweight diversion sheave 20, this can cause to be seriously worn to composite steel band 500.One
500 excessive wear of denier composite steel band has the danger for causing fracture, seriously threatens the safe operation of elevator.In order to guarantee that elevator is pacified
Row for the national games, whether the sideslip of sideslip monitors the composite steel band 500 that the present invention provides a kind of suitable for detecting and monitoring elevator in due course
Device.
Fig. 2 shows the schematic diagram of the sideslip monitoring device of the embodiment of an exemplary according to the present invention；Fig. 3 display figure
The stereoscopic schematic diagram of the photo resistance of sideslip monitoring device shown in 2.
As shown in Figures 2 and 3, in the illustrated embodiment, which mainly includes：At least a pair of photosensitive electricity
Resistance 31,32, electric resistance measuring apparatus (not shown) and sideslip judgment means (not shown).
As shown in Figures 2 and 3, in the illustrated embodiment, each pair of photo resistance 31,32 includes 31 and of the first photo resistance
Second photo resistance 32.The left side in the width direction of composite steel band 500, the second photo resistance is arranged in first photo resistance 31
32 are arranged in the right in the width direction of composite steel band 500.Electric resistance measuring apparatus and the first photo resistance 31 and second are photosensitive
Resistance 32 is electrically connected, and is adapted to detect for the resistance value of the first photo resistance 31 and the second photo resistance 32.Sideslip judgment means and electricity
Measuring device electrical connection is hindered, suitable for judging according to the resistance value of the first photo resistance 31 and the second photo resistance 32 that detect
Composite steel band 500 whether sideslip.
As shown in Figures 2 and 3, in the illustrated embodiment, when composite steel band 500 is in correct operating position, the
Photosensitive surface 31a, 32a of one photo resistance 31 and the second photo resistance 32 are in face of composite steel band 500 and complete by composite steel band 500
It blocks entirely, at this point, photosensitive surface 31a, 32a of the first photo resistance 31 and the second photo resistance 32 cannot receive ambient light
Line, therefore, the resistance value of the first photo resistance 31 and the second photo resistance 32 are larger.
As shown in Figures 2 and 3, in the illustrated embodiment, when composite steel band 500 deviates its correct operating position,
At least part of one photosensitive surface in first photo resistance 31 and the second photo resistance 32 is not by composite steel band 500
It blocks, another photosensitive surface is blocked completely by composite steel band 500.At this point, the first photo resistance 31 and the second photo resistance
One photosensitive surface in 32 can receive ambient, and therefore, resistance value can become smaller.
Therefore, sideslip monitoring device of the invention can be according to the resistance of the first photo resistance 31 and the second photo resistance 32
The variation of value come monitor composite steel band 500 whether sideslip.
As shown in Figures 2 and 3, in the illustrated embodiment, when detecting the first photo resistance 31 and the second photo resistance
When one resistance value in 32 is lower than predetermined threshold, sideslip judgment means determine that composite steel band 500 deviates it and correctly works
Position.
As shown in Figures 2 and 3, in the illustrated embodiment, when detecting the first photo resistance 31 and the second photo resistance
One resistance value in 32 lower than predetermined threshold and when another resistance value is higher than predetermined threshold, sentence by sideslip judgment means
Determine composite steel band 500 and deviates its correct operating position.
As shown in Figures 2 and 3, in the illustrated embodiment, sideslip monitoring device further includes deflection warning device, the sideslip
Warning device is electrically connected with sideslip judgment means.When sideslip judgment means determine that composite steel band 500 deviates its correct working position
When setting, deflection warning device sounds an alarm in time.
As shown in Figures 2 and 3, in the illustrated embodiment, when composite steel band 500 is in correct operating position, the
The resistance value of one photo resistance 31 and the second photo resistance 32 is equal to first resistor value, which is higher than aforementioned predetermined threshold
Value.
As shown in Figures 2 and 3, in the illustrated embodiment, when composite steel band 500 deviates its correct operating position,
One resistance value in first photo resistance 31 and the second photo resistance 32 is lower than predetermined threshold, another resistance value is equal to
First resistor value.
As shown in Figures 2 and 3, in the illustrated embodiment, when composite steel band 500 deviates to the left, the first photo resistance
31 resistance value is lower than predetermined threshold, and the resistance value of the second photo resistance 32 is equal to first resistor value.
As shown in Figures 2 and 3, in the illustrated embodiment, when composite steel band 500 deviates to the right, the second photo resistance
32 resistance value is lower than predetermined threshold, and the resistance value of the first photo resistance 31 is equal to first resistor value.
As shown in Figures 2 and 3, in the illustrated embodiment, in the traction sheave of elevator 10 and counterweight diversion sheave 20 extremely
One or more pairs of photo resistance 31,32 are provided at one few.
As shown in Figures 2 and 3, in the illustrated embodiment, one or more pairs of light are provided at the traction sheave of elevator 10
Quick resistance 31,32.Meanwhile one or more pairs of photo resistance 31,32 are also equipped at the counterweight diversion sheave of elevator 20.
As shown in Figures 2 and 3, in the illustrated embodiment, sideslip monitoring device further includes mounting plate 40, the mounting plate 40
It is fixed on the traction machine 200 of elevator or the mounting rack of counterweight 400, photo resistance 31,32 is fixed on mounting plate 40.
As shown in Figures 2 and 3, in the illustrated embodiment, electric resistance measuring apparatus is arranged on mounting plate 40, photo resistance
31,32 pin 31b, 32b is electrically connected to electric resistance measuring apparatus.
As shown in Figures 2 and 3, in the illustrated embodiment, mounting plate 40 can be circuit board, and electric resistance measuring apparatus can be with
To form resistance detecting circuit on circuit boards.
As shown in Figures 2 and 3, in the illustrated embodiment, sideslip judgment means can be set on circuit boards, and can be with
It is electrically connected by the conductive trace on circuit board with electric resistance measuring apparatus.
It will be understood to those skilled in the art that embodiment described above is all exemplary, and this field
Technical staff can make improvements, the rushing in terms of not recurring structure or principle of structure described in various embodiments
It can be freely combined in the case where prominent.
Although in conjunction with attached drawing, the present invention is described, and embodiment disclosed in attached drawing is intended to preferred to the present invention
Embodiment illustrates, and should not be understood as to a kind of limitation of the invention.
Although some embodiments of this present general inventive concept have been shown and have illustrated, those of ordinary skill in the art will be managed
Solution can make a change these embodiments in the case where the principle and spirit without departing substantially from this present general inventive concept, of the invention
Range is limited with claim and their equivalent.
It should be noted that word " comprising " is not excluded for other element or steps, word "a" or "an" is not excluded for multiple.Separately
Outside, the range that any element label of claim should not be construed as limiting the invention.
Claims (14)
1. a kind of sideslip monitoring device, suitable for the composite steel band (500) of real-time detection and monitoring elevator whether sideslip, feature exists
In the sideslip monitoring device includes：
At least a pair of of photo resistance (31,32), each pair of photo resistance (31,32) include that the first photo resistance (31) and second are photosensitive
Resistance (32), the left side that first photo resistance (31) is arranged in the width direction of composite steel band (500), second light
The right that quick resistance (32) is arranged in the width direction of composite steel band (500)；
Electric resistance measuring apparatus is electrically connected with first photo resistance (31) and second photo resistance (32), is adapted to detect for
The resistance value of first photo resistance (31) and second photo resistance (32)；With
Sideslip judgment means are electrically connected with the electric resistance measuring apparatus, suitable for according to first photo resistance detected
(31) and the resistance value of second photo resistance (32) come judge the composite steel band (500) whether sideslip,
When the composite steel band (500) is in correct operating position, first photo resistance (31) and second light
The photosensitive surface (31a, 32a) of quick resistance (32) hides completely in face of the composite steel band (500) and by the composite steel band (500)
Gear,
When the composite steel band (500) deviates its correct operating position, first photo resistance (31) and described second
At least part of one photosensitive surface in photo resistance (32) is not blocked by the composite steel band (500), another
Photosensitive surface blocked completely by the composite steel band (500).
2. sideslip monitoring device according to claim 1, it is characterised in that：
When detecting one resistance value in first photo resistance (31) and second photo resistance (32) lower than pre-
When determining threshold value, the sideslip judgment means determine that the composite steel band (500) deviates its correct operating position.
3. sideslip monitoring device according to claim 1, it is characterised in that：
When detecting one resistance value in first photo resistance (31) and second photo resistance (32) lower than pre-
When determining threshold value and another resistance value and being higher than the predetermined threshold, the sideslip judgment means determine the composite steel band
(500) its correct operating position is deviated.
4. sideslip monitoring device according to claim 2 or 3, it is characterised in that：
The sideslip monitoring device further includes deflection warning device, and the deflection warning device is electrically connected with the sideslip judgment means
It connects；
When the sideslip judgment means determine that the composite steel band (500) deviates its correct operating position, the sideslip report
Alarm device sounds an alarm in time.
5. sideslip monitoring device according to claim 2 or 3, it is characterised in that：
When the composite steel band (500) is in correct operating position, first photo resistance (31) and second light
The resistance value of quick resistance (32) is equal to first resistor value, and the first resistor value is higher than the predetermined threshold.
6. sideslip monitoring device according to claim 5, it is characterised in that：
When the composite steel band (500) deviates its correct operating position, first photo resistance (31) and described second
One resistance value in photo resistance (32) is lower than the predetermined threshold, another resistance value is equal to the first resistor
Value.
7. sideslip monitoring device according to claim 6, it is characterised in that：
When the composite steel band (500) deviates to the left, the resistance value of first photo resistance (31) is lower than the predetermined threshold
The resistance value of value, second photo resistance (32) is equal to the first resistor value.
8. sideslip monitoring device according to claim 6, it is characterised in that：
When the composite steel band (500) deviates to the right, the resistance value of second photo resistance (32) is lower than the predetermined threshold
The resistance value of value, first photo resistance (31) is equal to the first resistor value.
9. sideslip monitoring device according to claim 1, it is characterised in that：
It is provided at least one of the traction sheave (10) of elevator and counterweight diversion sheave (20) place one or more pairs of described photosensitive
Resistance (31,32).
10. sideslip monitoring device according to claim 9, it is characterised in that：
One or more pairs of photo resistance (31,32) are provided at the traction sheave (10) of the elevator；And
One or more pairs of photo resistance (31,32) are provided at the counterweight diversion sheave (20) of the elevator.
11. sideslip monitoring device according to claim 1, it is characterised in that：
The sideslip monitoring device further includes mounting plate (40), and the mounting plate (40) is fixed on the traction machine of the elevator
(200) or on the mounting rack of counterweight (400), the photo resistance (31,32) is fixed on the mounting plate (40).
12. sideslip monitoring device according to claim 11, it is characterised in that：
The electric resistance measuring apparatus is arranged on the mounting plate (40), the pin (31b, 32b) of the photo resistance (31,32)
It is electrically connected to the electric resistance measuring apparatus.
13. sideslip monitoring device according to claim 12, it is characterised in that：
The mounting plate (40) is circuit board, and the electric resistance measuring apparatus is the resistance detection electricity being formed on the circuit board
Road.
14. sideslip monitoring device according to claim 13, it is characterised in that：
The sideslip judgment means are arranged on the circuit board, and pass through the conductive trace and the resistance on the circuit board
Measuring device electrical connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810886083.7A CN108840191B (en) | 2018-08-06 | 2018-08-06 | Deviation monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810886083.7A CN108840191B (en) | 2018-08-06 | 2018-08-06 | Deviation monitoring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108840191A true CN108840191A (en) | 2018-11-20 |
| CN108840191B CN108840191B (en) | 2021-03-30 |
Family
ID=64192739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810886083.7A Active CN108840191B (en) | 2018-08-06 | 2018-08-06 | Deviation monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108840191B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110482356A (en) * | 2019-09-18 | 2019-11-22 | 日立电梯（中国）有限公司 | A kind of elevator steel belt deviation monitoring correcting device |
| CN111638560A (en) * | 2019-03-01 | 2020-09-08 | 中国农业大学 | Sunlight greenhouse roller shutter positioning method and synchronous monitoring method |
| CN111847174A (en) * | 2020-08-28 | 2020-10-30 | 福建省特种设备检验研究院 | Traction sheave wear degree monitoring device and method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103010704A (en) * | 2012-12-19 | 2013-04-03 | 肇庆宏旺金属实业有限公司 | Steel band running deviation correcting system and deviation correcting method |
| CN206599338U (en) * | 2017-03-01 | 2017-10-31 | 广州广日电梯工业有限公司 | Elevator traction steel band caging system |
-
2018
- 2018-08-06 CN CN201810886083.7A patent/CN108840191B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103010704A (en) * | 2012-12-19 | 2013-04-03 | 肇庆宏旺金属实业有限公司 | Steel band running deviation correcting system and deviation correcting method |
| CN206599338U (en) * | 2017-03-01 | 2017-10-31 | 广州广日电梯工业有限公司 | Elevator traction steel band caging system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111638560A (en) * | 2019-03-01 | 2020-09-08 | 中国农业大学 | Sunlight greenhouse roller shutter positioning method and synchronous monitoring method |
| CN111638560B (en) * | 2019-03-01 | 2022-03-15 | 中国农业大学 | Sunlight greenhouse roller shutter positioning method and synchronous monitoring method |
| CN110482356A (en) * | 2019-09-18 | 2019-11-22 | 日立电梯（中国）有限公司 | A kind of elevator steel belt deviation monitoring correcting device |
| CN111847174A (en) * | 2020-08-28 | 2020-10-30 | 福建省特种设备检验研究院 | Traction sheave wear degree monitoring device and method thereof |
| CN111847174B (en) * | 2020-08-28 | 2021-11-09 | 福建省特种设备检验研究院 | Traction sheave wear degree monitoring device and method thereof |
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| Publication number | Publication date |
|---|---|
| CN108840191B (en) | 2021-03-30 |
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