CN109029954A - A kind of loosened screw warning device and system - Google Patents
A kind of loosened screw warning device and system Download PDFInfo
- Publication number
- CN109029954A CN109029954A CN201810896247.4A CN201810896247A CN109029954A CN 109029954 A CN109029954 A CN 109029954A CN 201810896247 A CN201810896247 A CN 201810896247A CN 109029954 A CN109029954 A CN 109029954A
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- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 25
- 230000001133 acceleration Effects 0.000 claims description 11
- 241000237983 Trochidae Species 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 6
- 230000004913 activation Effects 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 239000000696 magnetic material Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
Abstract
The invention discloses a kind of loosened screw warning devices, it includes sensor, fixed bracket, sensor is mounted on fixed bracket, has sensor hole, screw hole on fixed bracket, sensor is installed on the position on fixed bracket where sensor hole with dismountable connection type.Loosened screw warning device is installed on destination apparatus by the screw on destination apparatus by the screw hole on fixed bracket by the loosened screw warning device.When the screw on destination apparatus loosens, fixed bracket by cannot be stable be mounted on destination apparatus, the sensor fixed on bracket at this time will sense loosening and the alarm of screw, therefore loosened screw warning device provided by the invention is able to solve the technical issues of alarm free is when screw loosens to cause the accident.The invention also discloses a kind of loosened screw alarm system, which includes intelligent terminal and above-mentioned loosened screw warning device.
Description
Technical field
The present invention relates to electronic technology fields, more specifically to a kind of loosened screw warning device and system.
Background technique
It the loosening of screw and falls off and will will cause serious accident, for example, on lathe equipments and other precision instruments
Screw, which falls off, will occur serious accident, for a more actual example: because the loosened screw on tire falls off on highway
And tire is caused to fall off, thus cause that the vehicle has a car accident and Adjacent vehicles are there is a situation where accident frequently occurs,
Whether the screw that driver will not generally go through fixed tire before driving loosens, it is seen that providing one kind can guarantee to pacify
Entirely, the device for avoiding screw from occurring to loosen and cause the accident has become important research topic.
Summary of the invention
The main purpose of the present invention is to provide a kind of loosened screw warning device and systems, it is intended to solve in the prior art
The technical issues of alarm free is when screw loosens to cause the accident.
To achieve the above object, the present invention provides a kind of loosened screw warning device, loosened screw warning device installation
In on destination apparatus；Loosened screw warning device includes sensor and fixed bracket, has sensor hole, screw on fixed bracket
Hole；Sensor is installed on the position on fixed bracket where sensor hole with dismountable connection type；
Destination apparatus includes screw, and loosened screw warning device is installed on mesh by the screw hole on fixed bracket by screw
On device for mark.
Optionally, sensor includes sensor pedestal and nut cap；Sensor pedestal passes through sensor hole, and nut cap is to press
Connection type is mounted on sensor pedestal；
The bolt of screw passes through the screw hole on fixed bracket, and by screw by way of being threadedly coupled with nut
Device for warning looseness is installed on destination apparatus.
Optionally, nut cap includes: nut cap shell, electroconductive elastic sheet and cushion rubber, and electroconductive elastic sheet is placed in nut cap shell bottom, and cushion rubber is placed in
On electroconductive elastic sheet；
Sensor pedestal includes at least bottom case, antenna plate, battery, sensing mould group and top shell, antenna plate be placed in bottom case and
Insulating trip is equipped between antenna plate and bottom case, antenna plate is connect by conductive pin with battery；Sensing mould group is placed on battery, and electricity
Insulation paster is equipped between pond and sensing mould group；Conductive column is welded in sensing mould group；
Antenna plate, battery, sensing mould group are placed in bottom case by top shell, have conductive pole hole, the top of conductive column in top shell
It is arranged in conductive pole hole.
Optionally, the antenna for being wirelessly connected with intelligent terminal is provided in antenna plate；Sensing mould group includes PCB
Plate and the master chip being arranged on pcb board, high frequency chip, LED light and pressure switch module；Master chip respectively with high frequency cores
Piece, LED light and the electrical connection of pressure switch module, antenna are electrically connected with high frequency chip；
Pressure switch module has open state and closed state, when pressure switch module is in the open state, pressure
Switch module is used to detect the pressure state between sensor pedestal and nut cap, and pressure state is pressured state or not subjected to pressure shape
State；
When sensor pedestal and nut cap are in pressured state, master chip is in close state for controlling LED light；Work as sense
When survey device pedestal and nut cap are in not subjected to pressure state, master chip is in the open state and glittering according to presetting for controlling LED light
Mode carries out glittering；
Master chip is also used to pressure state being transmitted to high frequency chip；
High frequency chip be used for by pressure state by antenna transmission to intelligent terminal so that intelligent terminal is shown.
Optionally, state acquisition module is additionally provided on pcb board, state acquisition module is connect with master chip；
State acquisition module is for detecting destination apparatus state in which and the time in state；State is work shape
State or off working state；
When destination apparatus is in running order, it is in the open state that master chip controls pressure switch module；
When destination apparatus is in off working state and the time for being in off working state is greater than preset time threshold, main core
Piece control pressure switch module is in close state.
Optionally, Magnetic Sensor is additionally provided on pcb board, Magnetic Sensor is connect with master chip；
Magnetic Sensor is used for after by the magnetic material activation outside loosened screw warning device, by what is obtained from master chip
Status information is transmitted to intelligent terminal by Magnetic Sensor, for intelligent terminal display status information.
Optionally, temperature sensor is additionally provided on pcb board, temperature sensor is connect with master chip；
Temperature sensor is for detecting temperature and temperature being sent to master chip；Temperature is the temperature of destination apparatus, or/and
The temperature of loosened screw warning device；
High frequency chip is also used to the temperature obtained from master chip through antenna transmission to intelligent terminal, for intelligent terminal
Displays temperature.
Optionally, destination apparatus is vehicle tyre, and fixed bracket is that there are two the arc-shaped bracket of screw hole, arc-shapeds for tool
The radian of bracket and the radian of vehicle tyre match.
Optionally, state acquisition module includes acceleration transducer, timer；
Acceleration transducer is used to detect the acceleration of vehicle tyre, judges vehicle according to acceleration by state acquisition module
Tire is in running order or off working state；
Timer is used to record that vehicle tyre to be in running order or the time of off working state.
Further, the present invention also provides a kind of loosened screw alarm systems, which includes intelligence
It can terminal and loosened screw warning device as described above.
Beneficial effect
Loosened screw warning device provided by the invention includes sensor, fixed bracket, and sensor is mounted on fixed bracket
On, there is sensor hole, screw hole on fixed bracket, sensor is installed on fixed bracket with dismountable connection type and is sensed
Position where device hole.The loosened screw warning device by the screw on destination apparatus pass through the screw hole on fixed bracket from
And loosened screw warning device is mounted on destination apparatus.When the screw on destination apparatus loosens, fixed bracket will
Cannot be stable be mounted on destination apparatus, the sensor fixed on bracket at this time will sense loosening and the alarm of screw,
Therefore loosened screw warning device provided by the invention can carry out warning note before screw occurs to loosen, to avoid screw
Occur to loosen and cause serious accident, further ensures safety.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those skilled in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is a kind of structural schematic diagram of loosened screw warning device provided in an embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram of sensor provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of another loosened screw warning device provided in an embodiment of the present invention；
Fig. 4 is the scheme of installation that loosened screw warning device provided in an embodiment of the present invention is installed on destination apparatus；
Fig. 5 is the explosion split graph of sensor provided by the present invention；
Fig. 6 is the schematic diagram of each device connection relationship on loosened screw warning device pcb board provided by the present invention.
Specific embodiment
In order to make the invention's purpose, features and advantages of the invention more obvious and easy to understand, below in conjunction with the present invention
Attached drawing in embodiment, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described reality
Applying example is only a part of the embodiment of the present invention, and not all embodiments.Based on the embodiments of the present invention, those skilled in the art
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
For avoid equipment because loosened screw, fall off due to cause the generation of accident, the present invention provides a kind of loosened screw reports
Alarm device, the loosened screw warning device are installed in equipment, which is known as destination apparatus by the present invention, on the target device
There is the fixation that each device on target device is realized using screw.Referring to Fig. 1, loosened screw warning device packet provided by the invention
Sensor 1 and fixed bracket 2 are included, there is sensor hole 21, screw hole 22 on fixed bracket, sensor 1 is removably to connect
Mode is installed on the position on fixed bracket 2 where sensor hole 21, and the screw on destination apparatus passes through the spiral shell on fixed bracket 2
Loosened screw warning device is installed on destination apparatus by wire hole 22.
Referring to fig. 2, sensor 1 includes nut cap 11 and sensor pedestal 12, sensor in the other example of the present embodiment
The method being mounted on fixed bracket can be found in Fig. 3: sensor pedestal 12 passes through sensor hole 21, and then nut cap 11 is with pressing
Connection type is mounted on sensor pedestal 12.How loosened screw warning device is mounted on destination apparatus, reference can be made to
The example of dotted line frame position in Fig. 4, the Fig. 4 be only in the present embodiment loosened screw warning device be mounted on destination apparatus
One example, under the example, destination apparatus is screw hole there are two vehicle tyre and loosened screw warning device tools, vehicle wheel
The bolt that tire is tightened up a screw passes through the screw hole 22 on fixed bracket 2, and by screw by way of being threadedly coupled with nut
Device for warning looseness is installed on destination apparatus.It is to be appreciated that the radian phase of the radian of arc-shaped bracket and vehicle tyre
Matching.In addition, the quantity that the application provides support bracket fastened screw hole on loosened screw warning device can be only one, still
Its quantity is two under normal circumstances.
Referring to Fig. 5, Fig. 5 is the other example of the present embodiment, wherein the nut cap 11 in sensor 1 include nut cap shell 111,
Electroconductive elastic sheet 112 and cushion rubber 113；Sensor pedestal 12 in sensor 1 includes bottom case 121, antenna plate 122, battery 123, sense
Survey mould group 124 and top shell 125.The structural relation of each function element is as follows in nut cap 11 and sensor pedestal 12:
Nut cap 11: electroconductive elastic sheet 112 is placed in 111 bottom of nut cap shell, and cushion rubber 113 is placed on electroconductive elastic sheet 112.
Sensor pedestal 12: antenna plate 122 is placed in bottom case 121 and is equipped with insulating trip between antenna plate 122 and bottom case 121
1201, antenna plate 122 is connect by conductive pin 1202 with battery 123；Sensing mould group 124 is placed on battery 123, and battery 123
Insulation paster 1203 is equipped between sensing mould group 124；Conductive column 1204 is welded in sensing mould group 124；
Antenna plate 122, battery 123, sensing mould group 124 are placed in bottom case 121 by top shell, have conductive column in top shell 125
The top in hole 1205, conductive column 1204 is arranged in conductive pole hole 1205.
In other some examples, the antenna for being wirelessly connected with intelligent terminal is provided in antenna plate 122,
It is to be appreciated that intelligent terminal herein can be vehicle electronic device or user terminal, user terminal includes user's
Mobile phone, bracelet, plate etc..Sensing mould group 124 includes pcb board and the master chip being arranged on pcb board, high frequency chip, LED light
And pressure switch module, the connection relationship of each device are as follows: master chip respectively with high frequency chip, LED light and pressure switch
Module electrical connection, antenna are electrically connected with high frequency chip.It is to be understood that pressure switch module has open state and closes shape
State.When pressure switch module is in the open state, pressure switch module is used to detect the pressure between sensor pedestal and nut cap
Power state, pressure state herein are pressured state or not subjected to pressure state.When sensor pedestal and nut cap are in pressured state,
Master chip is in close state for controlling LED light；When sensor pedestal and nut cap are in not subjected to pressure state, master chip is used for
Control LED light it is in the open state and according to preset glittering mode carry out it is glittering.When pressure switch module is in close state,
It will not detect the pressure state between sensor pedestal and nut cap.It is understood that glittering mode of presetting herein is LED light
Light on and off is carried out according to certain frequency.In actual application, multiple loosened screw alarms will be will be installed on target device
Device is to detect the dropping situations of multiple position screws, for convenient for identifying it is that the screw at which position falls off, loosened screw
Buzzer is additionally provided on warning device, loosened screw warning device can be sent out buzzing while LED light light on and off, with
Prompt user is specifically that the screw at which position is loosened.Master chip is also used to press in addition to the light on and off for controlling LED
The pressure state that power switch module detects is transmitted to high frequency chip, and pressure state is passed through antenna transmission extremely by high frequency chip at this time
Intelligent terminal is for intelligent terminal display status information.
Under the other example of the present embodiment, it is additionally provided with the state acquisition module connecting with master chip on pcb board, is used for
Detect destination apparatus state in which and the time in state；State herein is destination apparatus state in which, including
Working condition or off working state.It will be appreciated that in actual application, in order to which real-time monitoring destination apparatus is tightened up a screw
Loosening situation, when destination apparatus is in running order, loosened screw warning device will always be in working condition, i.e. pressure
Switch module is in the open state and pressure state between real-time monitoring sensor pedestal and nut cap.When destination apparatus is in non-
Working condition and in off working state time be greater than preset time threshold when, for convenient for energy conservation, master chip will control pressure
Switch module is in close state.It corresponds in actual conditions, used in the loosened screw warning device in the present embodiment
Destination apparatus is vehicle tyre, then working condition herein can be understood as vehicle be it is mobile, at this time vehicle tyre be in turn
In dynamic；Off working state is that vehicle is to stop, and vehicle tyre does not rotate at this time, when vehicle is in rotation, master chip control
Pressing pressure switch module is constantly in open state；Stop when vehicle is in, master chip still can control at pressure switch module
In open state, but when vehicle stops and the time stopped being greater than preset time threshold, master chip controls pressure switch mould
Block is in close state.Preset time threshold herein can be preset by user.Additionally need understanding, state acquisition mould
Block includes acceleration transducer, timer, and acceleration transducer is used to detect the acceleration of vehicle tyre, by state acquisition module
Judge that vehicle tyre is in running order or off working state according to acceleration, work is then in by timer record vehicle tyre
Make the time of state or off working state.
Under the other example of the present embodiment, the Magnetic Sensor connecting with master chip is additionally provided on pcb board, for by
After magnetic material activation outside to loosened screw warning device, the status information obtained from master chip is transmitted by Magnetic Sensor
To intelligent terminal, for intelligent terminal display status information.
Under other some examples, the temperature sensor connecting with master chip, temperature sensor are additionally provided on pcb board
For detecting temperature and temperature being sent to master chip；Temperature herein is the temperature or/and loosened screw alarm of destination apparatus
The temperature of device.High frequency chip is also used to the temperature obtained from master chip through antenna transmission to intelligent terminal at this time, for
Intelligent terminal displays temperature is to prompt user.
Fig. 6 is a kind of example under the present embodiment, is had simultaneously on the pcb board of the loosened screw warning device under the example
Pressure switch module, high frequency chip, master chip, LED light, temperature sensor, state acquisition module and Magnetic Sensor, it is each
The connection relationship of device can be as shown in Figure 6.
The present invention also provides a kind of loosened screw alarm system, which includes intelligent terminal and such as
On loosened screw warning device, which can be with intelligent terminal interactive, and intelligent terminal can will be handed over
Mutual information is shown to prompt user.
Loosened screw warning device provided by the invention includes sensor, fixed bracket, and sensor is mounted on fixed bracket
On, which is mounted on fixed bracket on destination apparatus by the screw on destination apparatus.When target fills
When the screw set loosens, fixed bracket by cannot be stable be mounted on destination apparatus, fix the sense on bracket at this time
The loosening of screw will be sensed by surveying device, and be alarmed, therefore loosened screw warning device provided by the invention is able to solve screw
The technical issues of alarm free is when loosening to cause the accident.
It should be noted that for the various method embodiments described above, describing for simplicity, therefore, it is stated as a series of
Combination of actions, but those skilled in the art should understand that, the present invention is not limited by the sequence of acts described because
According to the present invention, certain steps can use other sequences or carry out simultaneously.Secondly, those skilled in the art should also know
It knows, the embodiments described in the specification are all preferred embodiments, and related actions and modules might not all be this hair
Necessary to bright.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, there is no the portion being described in detail in some embodiment
Point, it may refer to the associated description of other embodiments, meanwhile, the serial number of the above embodiments of the invention is only for description, does not represent
The superiority and inferiority of embodiment, those skilled in the art under the inspiration of the present invention, are not departing from present inventive concept and right is wanted
It asks under protected ambit, can also make many forms, all of these belong to the protection of the present invention.
Claims (10)
1. a kind of loosened screw warning device, which is characterized in that the loosened screw warning device is installed on destination apparatus；Institute
Stating loosened screw warning device includes sensor and fixed bracket, has sensor hole, screw hole on the fixed bracket；It is described
Sensor is installed on the position on the fixed bracket where the sensor hole with dismountable connection type；
The destination apparatus includes screw, and the screw is alarmed the loosened screw by the screw hole on the fixed bracket
Device is installed on the destination apparatus.
2. loosened screw warning device as described in claim 1, which is characterized in that the sensor include sensor pedestal and
Nut cap；The sensor pedestal passes through the sensor hole, and the nut cap is mounted on the sensor with the connection type pressed
On pedestal；
The bolt of the screw passes through the screw hole on the fixed bracket, and will by way of being threadedly coupled with nut
The loosened screw warning device is installed on the destination apparatus.
3. loosened screw warning device as claimed in claim 2, which is characterized in that the nut cap includes: nut cap shell, conductive bullet
Piece and cushion rubber, the electroconductive elastic sheet are placed in nut cap shell bottom, and the cushion rubber is placed on the electroconductive elastic sheet；
The sensor pedestal includes at least bottom case, antenna plate, battery, sensing mould group and top shell, and the antenna plate is placed in described
It is equipped in bottom case and between the antenna plate and the bottom case insulating trip, the antenna plate is connected by conductive pin and the battery
It connects；The sensing mould group is placed on the battery, and is equipped with insulation paster between the battery and the sensing mould group；The sense
It surveys in mould group and is welded with conductive column；
The antenna plate, battery, sensing mould group are placed in the bottom case by the top shell, have conductive pole hole in the top shell,
The top of the conductive column is arranged in the conductive pole hole.
4. loosened screw warning device as claimed in claim 3, which is characterized in that be provided with and be used for and intelligence in the antenna plate
The antenna that energy terminal is wirelessly connected；The sensing mould group include pcb board and the master chip being arranged on the pcb board,
High frequency chip, LED light and pressure switch module；The master chip respectively with the high frequency chip, LED light and pressure switch
Module electrical connection, the antenna are electrically connected with the high frequency chip；
The pressure switch module has open state and closed state, when the pressure switch module is in the open state,
The pressure switch module is used to detect the pressure state between the sensor pedestal and the nut cap, and the pressure state is
Pressured state or not subjected to pressure state；
When the sensor pedestal and the nut cap are in pressured state, the master chip is in for controlling the LED light
Closed state；When the sensor pedestal and the nut cap are in not subjected to pressure state, the master chip is for controlling the LED
Lamp it is in the open state and according to preset glittering mode carry out it is glittering；
The master chip is also used to the pressure state being transmitted to the high frequency chip；
The high frequency chip is used for the pressure state through the antenna transmission to the intelligent terminal for the intelligence
Terminal is shown.
5. loosened screw warning device as claimed in claim 4, which is characterized in that be additionally provided with state on the pcb board and adopt
Collect module, the state acquisition module is connect with the master chip；
The state acquisition module is for detecting the destination apparatus state in which and the time in the state；It is described
State is in working condition or off working state；
When the destination apparatus is in running order, it is in the open state that the master chip controls the pressure switch module；
When the destination apparatus is in off working state and the time for being in the off working state is greater than preset time threshold,
The master chip controls the pressure switch module and is in close state.
6. loosened screw warning device as claimed in claim 4, which is characterized in that be additionally provided with magnetic sensing on the pcb board
Device, the Magnetic Sensor are connect with the master chip；
The Magnetic Sensor is used for after by the magnetic material activation outside the loosened screw warning device, will be from the main core
The status information that piece obtains is transmitted to the intelligent terminal by the Magnetic Sensor, so that the intelligent terminal shows institute
State status information.
7. loosened screw warning device as claimed in claim 4, which is characterized in that be additionally provided with temperature biography on the pcb board
Sensor, the temperature sensor are connect with the master chip；
The temperature sensor is for detecting temperature and the temperature being sent to the master chip；The temperature is the target
The temperature of the temperature of device or/and the loosened screw warning device；
The temperature that the high frequency chip is also used to obtain from the master chip passes through the antenna transmission to the intelligence
Terminal, so that the intelligent terminal shows the temperature.
8. loosened screw warning device as claimed in claim 5, which is characterized in that the destination apparatus is vehicle tyre, institute
Stating fixed bracket is that there are two the arc-shaped bracket of screw hole, the radian of the arc-shaped bracket and the arcs of the vehicle tyre for tool
Degree matches.
9. loosened screw warning device as claimed in claim 8, which is characterized in that the state acquisition module includes acceleration
Sensor, timer；
The acceleration transducer is used to detect the acceleration of the vehicle tyre, is added by the state acquisition module according to described
Vehicle tyre described in velocity estimated is in running order or off working state；
The timer is used to record that the vehicle tyre to be in running order or the time of off working state.
10. a kind of loosened screw alarm system, which is characterized in that the loosened screw sensing system includes intelligent terminal and such as weighs
Benefit requires loosened screw warning device described in 4-9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810896247.4A CN109029954B (en) | 2018-08-08 | 2018-08-08 | Screw loosening alarm device and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810896247.4A CN109029954B (en) | 2018-08-08 | 2018-08-08 | Screw loosening alarm device and system |
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| CN109029954A true CN109029954A (en) | 2018-12-18 |
| CN109029954B CN109029954B (en) | 2024-03-08 |
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| CN201810896247.4A Active CN109029954B (en) | 2018-08-08 | 2018-08-08 | Screw loosening alarm device and system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110889485A (en) * | 2019-10-22 | 2020-03-17 | 浙江工商职业技术学院 | Counter mould |
| CN110925492A (en) * | 2019-11-29 | 2020-03-27 | 游代松 | Sewage treatment pipeline fixing device convenient to overhaul |
| CN111560741A (en) * | 2019-02-13 | 2020-08-21 | 青岛海尔洗衣机有限公司 | Wall-mounted clothes treatment equipment and installation detection method thereof |
| CN112082471A (en) * | 2020-09-16 | 2020-12-15 | 罗治军 | Formula wind generating set bolt on-line monitoring device is inhaled to magnetism |
| CN113899534A (en) * | 2020-07-05 | 2022-01-07 | 华东交通大学 | Platform canopy fixing screw looseness detection method |
| CN117168294A (en) * | 2023-09-04 | 2023-12-05 | 大庆石油管理局有限公司 | Screw looseness alarm device based on displacement of motor of tower type pumping unit |
| CN117168294B (en) * | 2023-09-04 | 2024-04-30 | 大庆石油管理局有限公司 | Screw looseness alarm device based on displacement of motor of tower type pumping unit |
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