CN115979111A - High-strength bolt fastening maintenance system and method - Google Patents
High-strength bolt fastening maintenance system and method Download PDFInfo
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- CN115979111A CN115979111A CN202211682791.1A CN202211682791A CN115979111A CN 115979111 A CN115979111 A CN 115979111A CN 202211682791 A CN202211682791 A CN 202211682791A CN 115979111 A CN115979111 A CN 115979111A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The invention discloses a high-strength bolt fastening maintenance system and a method, belonging to the field of bolt maintenance, wherein the maintenance system comprises a gap monitoring module, an ultrasonic monitoring module, a data acquisition module and an information analysis processing module; the gap monitoring module is used for monitoring the gap change of the flange to lock the misalignment bolt area and transmitting monitoring information to the data acquisition module; the ultrasonic monitoring module is used for monitoring the bolt pretightening force deviation condition and transmitting monitoring information to the data acquisition module; the data acquisition module is used for acquiring the flange gap change information and the bolt pretightening force deviation information and transmitting the flange gap change information and the bolt pretightening force deviation information to the information processing module; the information analysis processing module is used for making a differential maintenance scheme according to the flange gap change information and the bolt pretightening force deviation information. The invention adopts a connecting flange gap monitoring and bolt pretightening force ultrasonic detection system, accurately identifies the misaligned bolt, and formulates a differential maintenance scheme to implement the overhaul and maintenance of the bolt.
Description
Technical Field
The invention relates to the field of bolt maintenance, in particular to a high-strength bolt fastening maintenance system and a high-strength bolt fastening maintenance method.
Background
At present, bolts are frequently used in the mechanical assembly industry, the firmness of mechanical assembly is directly influenced by the quality of the bolts, and the bolts are fastened together through nuts when being assembled for the first time. However, as the mechanical device is used and time passes, the nut and the bolt may loosen, and the bolt itself may change, so that the load value borne by the bolt changes. Therefore, the bolt-fastening performance needs to be repaired and maintained.
The existing wind power high-strength bolt is inconvenient to identify the stress state of the service bolt, so that the bolt is generally maintained at regular intervals according to experience values, on one hand, the loosened bolt cannot be maintained in time, and the fatigue damage of the low-pretightening-force service is aggravated; on the other hand, for the bolt which is not loosened, frequent torque application causes damage to the internal tissue and the joint surface of the high-strength bolt, and the service life is influenced.
Accordingly, one skilled in the art provides a high-strength bolt-fastening maintenance system and method to solve the problems set forth in the background art described above.
Disclosure of Invention
The invention aims to provide a high-strength bolt fastening maintenance system and a high-strength bolt fastening maintenance method, which adopt a connecting flange gap monitoring and bolt pretightening force ultrasonic detection system to accurately identify an out-of-alignment bolt and formulate a differential maintenance scheme to implement the maintenance and repair of the bolt so as to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
a high-strength bolt fastening maintenance system comprises a gap monitoring module, an ultrasonic monitoring module, a data acquisition module and an information analysis processing module; the gap monitoring module is used for monitoring the gap change of the flange to lock the misalignment bolt area and transmitting monitoring information to the data acquisition module; the ultrasonic monitoring module is used for monitoring the bolt pretightening force deviation condition and transmitting monitoring information to the data acquisition module; the data acquisition module is used for acquiring the flange gap change information and the bolt pretightening force deviation information and transmitting the flange gap change information and the bolt pretightening force deviation information to the information processing module; the information analysis processing module is used for formulating a differential maintenance scheme according to the flange gap change information and the bolt pretightening force deviation information to implement the overhaul and maintenance of the bolt; clearance monitoring module includes clearance displacement sensor and clearance displacement sensor down, and goes up clearance displacement sensor and clearance displacement sensor down and fix respectively on last flange and lower flange, go up clearance displacement sensor and the relative setting of clearance displacement sensor down and have the quilt survey clearance, clearance monitoring module's specific monitoring process is: when the flange bolt is loosened, the flange gap is enlarged, displacement data between the upper gap displacement sensor and the lower gap displacement sensor are driven to change, the size and the position of a measured gap can change due to the influence of alternating load, and the bolt loosening condition of the whole flange can be reflected by monitoring the change of the measured gap; ultrasonic monitoring module includes ultrasonic detection equipment and inhales the probe with the magnetism that ultrasonic detection equipment is connected, and inhale the probe magnetism and inhale the tip of fixing at the flange bolt, ultrasonic monitoring module's concrete monitoring process is: the magnetic suction probe is used for respectively measuring the transit time of longitudinal waves and transverse waves of the flange bolt in a stressed state, and then ratio operation is carried out, so that the pretightening force information of the flange bolt can be obtained.
As a further scheme of the invention: the gap monitoring modules are uniformly distributed on the upper flange and the lower flange at equal angles.
As a still further scheme of the invention: the upper gap displacement sensor comprises a circuit board card and an induction coil, and the lower gap displacement sensor comprises an induction triggering module.
As a still further scheme of the invention: the gap monitoring module transmits monitoring information to the data acquisition module in an RS485 communication mode.
As a still further scheme of the invention: the calculation process of the pre-tightening force of the flange bolt is as follows:
wherein F is the pretightening force of the bolt; e is the elastic modulus of the bolt material; s is the sectional area of the bolt; Δ L is the deformation of the bolt; and L is the clamping length of the bolt pair.
As a further scheme of the invention: the specific formulation process of the differentiated maintenance scheme comprises the following steps:
the method comprises the following steps: marking out the bolts with abnormality within three months, and counting the installation time of all the bolts;
step two: determining the maintenance frequency of each bolt according to the installation time of the bolt and the abnormal times;
step three: and marking the abnormal bolt on a map, and arranging X workers in a preset range for maintenance by taking the abnormal bolt as a central point.
As a further scheme of the invention: the specific determination process of the repair frequency in the second step is as follows:
s1: marking the times of the abnormality of each bolt in three months as A;
s2: marking the installation time of each bolt as B according to the monthly shares, and calculating according to the full moon when the bolt is not full of the moon;
s3: enabling the overhauling frequency of each bolt to be C, wherein C =3A +2B;
s4: the weekly maintenance frequency of each bolt is calculated to be f = (7 × 24)/C, namely, each bolt is maintained every f hours in one week.
As a further scheme of the invention: the bolt abnormality in the first step means that any one or two of the gap change of the flange and the pretightening force deviation of the bolt occur.
As a further scheme of the invention: in the third step, if N abnormal bolts are concentrated on the same device, the number X of workers who go to maintenance before is adjusted, and the specific adjustment is as follows:
if N is less than or equal to 3, then X =1;
if N is more than 3 and less than or equal to 10, then X =3;
if N > 10, X =5.
The application also discloses a high-strength bolt fastening maintenance method, which comprises the following steps:
monitoring flange clearance changes to lock out misaligned bolt areas;
monitoring the bolt pretightening force deviation condition;
collecting flange gap change information and bolt pretightening force deviation information;
and formulating a differentiated maintenance scheme according to the flange gap change information and the bolt pretightening force deviation information to implement the overhaul and maintenance of the bolt.
Compared with the prior art, the invention has the beneficial effects that:
1. adopt flange clearance monitoring and bolt pretightning force ultrasonic detection system, accurate discernment is misaligned the bolt, overhauls and maintains: rapidly locking the misaligned bolt area according to the change of the clearance through clearance monitoring; then, accurately detecting the bolt with pretightening force deviation by using ultrasonic detection equipment; and carrying out the overhaul and maintenance of the bolt according to a differentiated maintenance scheme.
2. The utility model provides a bolt that the differentiation maintenance scheme can learn which positions appears unusually or damages easily through statistics bolt unusual number of times, the ageing degree of bolt is confirmed to rethread statistics bolt's installation time, its ageing degree is just also higher more for a long time more for installation time, learn the maintenance frequency of every bolt through these two parameters at last, this setting can avoid real-time detection under the prerequisite of guaranteeing maintenance quality, the energy can be saved, furthermore, carry out the bolt that different suitable different positions that the differentiation was overhauld can be better according to the different situation of every bolt, improve the detection precision. When the abnormal bolt is maintained specifically, the nearest proper number of workers are dispatched to maintain by taking the position of the abnormal bolt as a center, so that the workload of the workers is not overlarge on the premise of ensuring that the maintenance work is finished smoothly.
3. The method can be used for timely and fully maintaining the misalignment bolt, avoiding the occurrence of bolt breakage faults, saving the fault processing cost and reducing the complaints of customers.
4. The moment of the misalignment bolt is maintained, the same stress environment as that of the peripheral bolt can be kept, uneven stress is avoided, and damage to the bolt is reduced;
5. the maintenance frequency of the normally-used bolt is reduced, and the external force damage of the bolt is reduced;
6. and the maintenance workload is reduced, so that the maintenance cost is saved.
Drawings
FIG. 1 is a block diagram of a high-strength bolt fastening maintenance system;
FIG. 2 is a flow chart of a high strength bolt tightening maintenance method;
fig. 3 is a combined view of an upper gap displacement sensor and a lower gap displacement sensor according to the present application.
In the figure: 1. an upper flange; 2. a lower flange; 3. an upper gap displacement sensor; 4. a lower gap displacement sensor; 5. the measured gap.
Detailed Description
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
Referring to fig. 1 to 3, in an embodiment of the present invention, a high-strength bolt fastening maintenance system includes a gap monitoring module, an ultrasonic monitoring module, a data acquisition module, and an information analysis processing module; the clearance monitoring module is used for monitoring the change of the clearance of the flange to lock the misalignment bolt area and transmitting monitoring information to the data acquisition module; the ultrasonic monitoring module is used for monitoring the bolt pretightening force deviation condition and transmitting monitoring information to the data acquisition module; the data acquisition module is used for acquiring the flange gap change information and the bolt pretightening force deviation information and transmitting the flange gap change information and the bolt pretightening force deviation information to the information processing module; the information analysis processing module is used for formulating a differential maintenance scheme according to the flange gap change information and the bolt pretightening force deviation information to implement the overhaul and maintenance of the bolt; the clearance monitoring module includes clearance displacement sensor 3 and clearance displacement sensor 4 down, and goes up clearance displacement sensor 3 and clearance displacement sensor 4 down and fix respectively on last flange 1 and lower flange 2, goes up clearance displacement sensor 3 and clearance displacement sensor 4 relative setting down and has the quilt survey clearance 5, and the concrete monitoring process of clearance monitoring module is: when the flange bolt is loosened, the flange gap is enlarged, the displacement data between the upper gap displacement sensor 3 and the lower gap displacement sensor 4 is driven to change, the size and the position of the measured gap 5 can change due to the influence of alternating load, and the bolt loosening condition of the whole flange can be reflected by monitoring the change of the measured gap 5; ultrasonic monitoring module includes ultrasonic detection equipment and inhales the probe with the magnetism that ultrasonic detection equipment is connected, and the magnetism of inhaling the probe magnetism is inhaled and is fixed the tip at the flange bolt, and ultrasonic monitoring module's specific monitoring process is: the magnetic suction probe is used for respectively measuring the transit time of longitudinal waves and transverse waves of the flange bolt in a stressed state, and then ratio operation is carried out, so that the pretightening force information of the flange bolt can be obtained. This application adopts flange clearance monitoring and bolt pretightning force ultrasonic detection system, and accurate discernment is misaligned the bolt to formulate the maintenance and the maintenance that the differentiation was maintained the scheme and is implemented the bolt.
In this embodiment: the gap monitoring modules are uniformly distributed and installed on the upper flange 1 and the lower flange 2 at equal angles by a sector (in the embodiment, the sector angle is 60 degrees). This setting can reduce the quantity of clearance monitoring module under the prerequisite of effective monitoring to this cost is practiced thrift. It should be noted that, the number of bolts of the wind turbine blade root and the tower drum is large, and the spatial position span is large, so that it is necessary to perform online monitoring on a plurality of bolts on the wind turbine generator, the pretightening force state of the flange bolt of the tower drum of the wind turbine generator is monitored in real time through the high-strength bolt fastening maintenance system, the problem of loosening or breaking is predicted in advance, and the safe and stable operation of the wind turbine generator set is ensured.
In this embodiment: the upper gap displacement sensor 3 comprises a circuit board card and an induction coil, and the lower gap displacement sensor 4 comprises an induction triggering module. The induction coil and the induction triggering module are used for inducing variation when the gap is changed and converting the variation into digital information through the circuit board card.
In this embodiment: the gap monitoring module transmits monitoring information to the data acquisition module in an RS485 communication mode. The RS485 communication mode is stable and efficient.
In this embodiment: the ultrasonic detection pretightening force detection principle is that according to the acoustic elasticity principle, the speed of ultrasonic waves generates tiny change due to the existence of fastening force in materials, the fastening force in a detected bolt can be measured by utilizing the ultrasonic waves by researching the relation between the axial stress of the detected bolt and the change rate of the propagation time of the ultrasonic waves, the method utilizes the propagation speed or the propagation time of the ultrasonic waves and other parameters to represent the stress of the bolt, and the speed of the ultrasonic waves is generally not directly measured in practical application but is converted into a measurement sound time value. The sound time value refers to the round trip time required for the ultrasonic wave to propagate along the axial direction of the bolt. The measurement using the sound time value is divided into a longitudinal wave method and a longitudinal and transverse wave method. According to the method, the transverse wave and longitudinal wave combined technical principle is utilized, the transit time of the longitudinal wave and the transverse wave of the bolt in a stressed state is measured respectively, and then the ratio operation is carried out, so that the axial stress of the bolt can be obtained. The method is suitable for measuring the stress of the installed and unassemblable bolts, the bolts do not need to be calibrated, the requirement of general engineering application can be met by simple operation, and the stress of the bolts can be quickly and accurately detected.
In this embodiment: the calculation process of the pre-tightening force of the flange bolt is as follows:
wherein F is the pretightening force of the bolt; e is the elastic modulus of the bolt material; s is the sectional area of the bolt; Δ L is the deformation of the bolt; l is the clamping length of the bolt pair.
In this embodiment: the specific making process of the differentiated maintenance scheme comprises the following steps: the method comprises the following steps: marking out the bolts with abnormality within three months, and counting the installation time of all the bolts; step two: determining the maintenance frequency of each bolt according to the installation time of the bolt and the abnormal times; step three: the bolt with the abnormality is marked on the map, and then X workers are arranged in a preset range (in the embodiment, the preset range is three kilometers in radius) by taking the bolt with the abnormality as a center point to maintain. This application can learn the bolt of which position appears unusually or damages easily through statistics bolt unusual number of times, the ageing degree of bolt is confirmed to the installation time of rethread statistics bolt, its ageing degree is just also higher more for the installation time of being of a specified duration, learn the maintenance frequency of every bolt through these two parameters at last, it needs to explain that, the maintenance is judged through gathering flange clearance change information and bolt pretightning force deviation information, and when overhauing the target bolt, its relevant flange clearance change information is gathered from the nearest clearance monitoring module of distance target bolt.
In this embodiment: the specific determination process of the repair frequency in the second step is as follows: s1: marking the times of the abnormality of each bolt in three months as A; s2: marking the installation time of each bolt as B according to the monthly shares, and calculating the times of less than full months according to full months; s3: enabling the maintenance frequency of each bolt per week to be C, C =3A +2B;
s4: the weekly maintenance frequency of each bolt is calculated to be f = (7 × 24)/C, namely, each bolt is maintained every f hours in one week. This setting can avoid real-time detection under the prerequisite of guaranteeing maintenance quality, and the energy can be saved carries out the differentiation according to the different situation of every bolt and overhauls the bolt that is suitable for different positions that can be better, improves and detects the precision.
In this embodiment: the bolt is abnormal in the first step, namely any one or two of the gap change of the flange and the pretightening force deviation of the bolt occur.
In this embodiment: in the third step, if N abnormal bolts are concentrated on the same device, the number X of workers who go to maintenance is adjusted correspondingly, and the specific adjustment is as follows: if N is less than or equal to 3, then X =1; if N is more than 3 and less than or equal to 10, then X =3; if N > 10, X =5. The more of the unusual bolt that appears on same equipment, the more serious abnormal condition that just explains this equipment, maintenance work load just also is big more, lets under this kind of circumstances let alone do the life of three people, not only can cause staff's imbalance of psychology, still can let maintenance efficiency low, for this reason, this application carries out the adaptability adjustment to the staff's of maintenance quantity according to actual conditions to under the prerequisite of guaranteeing that maintenance work accomplishes smoothly, can not make staff's work load too big.
The application also discloses a high-strength bolt fastening maintenance method, which comprises the following steps:
monitoring flange clearance changes to lock out misaligned bolt areas;
monitoring the bolt pretightening force deviation condition;
acquiring flange gap change information and bolt pretightening force deviation information;
and formulating a differentiated maintenance scheme according to the flange gap change information and the bolt pretightening force deviation information to implement the overhaul and maintenance of the bolt.
The invention adopts a connecting flange clearance monitoring and bolt pretightening force ultrasonic detection system to accurately identify the misaligned bolt for overhauling and maintaining: rapidly locking the misaligned bolt area according to the change of the clearance through clearance monitoring; then, accurately detecting the bolt with pretightening force deviation by using ultrasonic detection equipment; and carrying out the overhaul and maintenance of the bolt according to a differentiated maintenance scheme. In addition, this application can in time be to misalignment bolt maintenance of heart, avoids the bolt fracture trouble to take place, practices thrift the fault handling cost, reduces the customer and complains about. The moment of the misalignment bolt is maintained, the same stress environment as that of the peripheral bolt can be kept, uneven stress cannot occur, and damage to the bolt is reduced; the maintenance frequency of the normal service bolt is reduced, and the external force damage of the bolt is reduced; and the maintenance workload is reduced, so that the maintenance cost is saved. In addition, the differentiation maintenance scheme of this application can learn the bolt of which position appears unusually or damages easily through statistics bolt unusual number of times, the ageing degree of bolt is confirmed to rethread statistics bolt's installation time, its ageing degree is just also higher more for a long time for installation time, learn the maintenance frequency of every bolt through these two parameters at last, this setting can avoid real-time detection under the prerequisite of guaranteeing maintenance quality, the energy can be saved, furthermore, carry out the bolt that different suitable different positions that the differentiation was overhauld can be better according to the different situation of every bolt, improve detection accuracy. When the abnormal bolt is maintained specifically, the nearest proper number of workers are dispatched to maintain by taking the position of the abnormal bolt as a center, so that the workload of the workers is not overlarge on the premise of ensuring that the maintenance work is finished smoothly.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (10)
1. A high-strength bolt fastening maintenance system is characterized by comprising a gap monitoring module, an ultrasonic monitoring module, a data acquisition module and an information analysis processing module;
the clearance monitoring module is used for monitoring the change of the clearance of the flange to lock the misalignment bolt area and transmitting the monitoring information to the data acquisition module; the ultrasonic monitoring module is used for monitoring the bolt pretightening force deviation condition and transmitting monitoring information to the data acquisition module; the data acquisition module is used for acquiring flange gap change information and bolt pretightening force deviation information and transmitting the flange gap change information and the bolt pretightening force deviation information to the information processing module; the information analysis processing module is used for formulating a differential maintenance scheme according to the flange gap change information and the bolt pretightening force deviation information to implement the overhaul and maintenance of the bolt;
clearance monitoring module includes clearance displacement sensor and clearance displacement sensor down, and goes up clearance displacement sensor and clearance displacement sensor down and fix respectively on last flange and lower flange, go up clearance displacement sensor and the relative setting of clearance displacement sensor down and have the quilt survey clearance, clearance monitoring module's specific monitoring process is: when the flange bolt is loosened, the flange gap is enlarged, the displacement data between the upper gap displacement sensor and the lower gap displacement sensor is driven to change, the size and the position of the measured gap are changed due to the influence of alternating load, and the bolt loosening condition of the whole flange can be reflected by monitoring the change of the measured gap;
ultrasonic monitoring module includes ultrasonic detection equipment and inhales the probe with the magnetism that ultrasonic detection equipment is connected, and inhales the probe magnetism and inhale the tip of fixing at the flange bolt, ultrasonic monitoring module's specific monitoring process is: the magnetic suction probe is used for respectively measuring the transit time of longitudinal waves and transverse waves of the flange bolt in a stressed state, and then the ratio operation is carried out, so that the pre-tightening force information of the flange bolt can be obtained.
2. The high-strength bolt-fastening maintenance system according to claim 1, wherein the gap monitoring modules are uniformly distributed in a sector with equal angles on the upper flange and the lower flange.
3. The high-strength bolt-fastening maintenance system according to claim 1, wherein the upper gap displacement sensor comprises a circuit board card and an induction coil, and the lower gap displacement sensor comprises an induction trigger module.
4. The high-strength bolt fastening maintenance system according to claim 1, wherein the gap monitoring module transmits monitoring information to the data acquisition module in an RS485 communication manner.
5. The high-strength bolt-tightening maintenance system according to claim 1, wherein the calculation process of the flange bolt pre-tightening force is as follows:
wherein F is the pretightening force of the bolt; e is the elastic modulus of the bolt material; s is the sectional area of the bolt; Δ L is the deformation of the bolt; and L is the clamping length of the bolt pair.
6. The high-strength bolt-fastening maintenance system according to claim 1, wherein the differential maintenance scheme is specifically formulated as follows:
the method comprises the following steps: marking out the bolts with abnormality within three months, and counting the installation time of all the bolts;
step two: determining the maintenance frequency of each bolt according to the installation time of the bolt and the abnormal times;
step three: and marking the abnormal bolt on a map, and arranging X workers in a preset range for maintenance by taking the abnormal bolt as a central point.
7. The high-strength bolt fastening maintenance system according to claim 6, wherein the specific determination process of the repair frequency in the second step is as follows:
s1: marking the times of the abnormality of each bolt in three months as A;
s2: marking the installation time of each bolt as B according to the monthly shares, and calculating the times of less than full months according to full months;
s3: enabling the maintenance frequency of each bolt per week to be C, C =3A +2B;
s4: the weekly maintenance frequency of each bolt is calculated to be f = (7 × 24)/C, namely, each bolt is maintained every f hours in one week.
8. The high-strength bolt-tightening maintenance system according to claim 6, wherein the abnormality of the bolt in the first step is one or both of a change in a gap between the flange and a deviation in a pretightening force of the bolt.
9. The high-strength bolt fastening maintenance system according to claim 6, wherein in the third step, if the N abnormal bolts are concentrated on the same equipment, the number X of workers going to be maintained is adjusted, specifically as follows:
if N is less than or equal to 3, then X =1;
if N is more than 3 and less than or equal to 10, then X =3;
if N > 10, X =5.
10. A high-strength bolt fastening maintenance method is characterized by comprising the following steps:
monitoring flange clearance changes to lock out misaligned bolt areas;
monitoring the bolt pretightening force deviation condition;
acquiring flange gap change information and bolt pretightening force deviation information;
and formulating a differentiated maintenance scheme according to the flange gap change information and the bolt pretightening force deviation information to implement the overhaul and maintenance of the bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211682791.1A CN115979111A (en) | 2022-12-27 | 2022-12-27 | High-strength bolt fastening maintenance system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211682791.1A CN115979111A (en) | 2022-12-27 | 2022-12-27 | High-strength bolt fastening maintenance system and method |
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| CN115979111A true CN115979111A (en) | 2023-04-18 |
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| CN202211682791.1A Pending CN115979111A (en) | 2022-12-27 | 2022-12-27 | High-strength bolt fastening maintenance system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117404260A (en) * | 2023-12-14 | 2024-01-16 | 吉睿智控科技（天津）有限公司 | Bolt loosening monitoring method and device, electronic equipment and storage medium |
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2022
- 2022-12-27 CN CN202211682791.1A patent/CN115979111A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117404260A (en) * | 2023-12-14 | 2024-01-16 | 吉睿智控科技（天津）有限公司 | Bolt loosening monitoring method and device, electronic equipment and storage medium |
| CN117404260B (en) * | 2023-12-14 | 2024-02-13 | 吉睿智控科技（天津）有限公司 | Bolt loosening monitoring method and device, electronic equipment and storage medium |
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