CN114593859A - Bolt connecting piece assembly auxiliary teaching system and method - Google Patents
Bolt connecting piece assembly auxiliary teaching system and method Download PDFInfo
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- CN114593859A CN114593859A CN202210268896.6A CN202210268896A CN114593859A CN 114593859 A CN114593859 A CN 114593859A CN 202210268896 A CN202210268896 A CN 202210268896A CN 114593859 A CN114593859 A CN 114593859A
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- 238000000034 method Methods 0.000 title claims abstract description 52
- 238000012549 training Methods 0.000 claims abstract description 31
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 239000010409 thin film Substances 0.000 claims description 4
- 239000002120 nanofilm Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/24—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/18—Measuring force or stress, in general using properties of piezo-resistive materials, i.e. materials of which the ohmic resistance varies according to changes in magnitude or direction of force applied to the material
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B5/00—Electrically-operated educational appliances
- G09B5/02—Electrically-operated educational appliances with visual presentation of the material to be studied, e.g. using film strip
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B9/00—Simulators for teaching or training purposes
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Business, Economics & Management (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses an auxiliary teaching system and method for assembling a bolt connecting piece, wherein the system comprises a pressure sensor, a data acquisition unit, a computer and a display; the pressure sensor collects the pressure applied to the bolt connecting assembly in the process of screwing the nut in real time and transmits a signal to the data collector; the data acquisition unit receives the signals transmitted by the pressure sensor, collects and records the real-time resistance value of the pressure sensor and transmits the resistance signals to the computer; a memory in the computer stores a curve of the resistance value of the pressure sensor, which is acquired during each training, along with the change of time to form a data set; the reference curve generation module selects data from a data set stored in a database as a reference curve according to engineering requirements; the final display shows the resistance value versus time. The system and the method provided by the invention overcome the problem that the teacher and the father cannot teach or teach the father by hand when meeting the assembly of special structures with narrow space and the like in the process of teaching the father or the father.
Description
Technical Field
The invention relates to the technical field of design of auxiliary teaching systems, in particular to an auxiliary teaching system and method for assembling a bolt connecting piece.
Background
Bolted joints are a common form of joint in engineered structures. Extensive testing and use experience has demonstrated that: higher bolt pretension is beneficial for the reliability of the connection and the lifetime of the connection, especially for connections with sealing requirements. Of course, in common jargon, "what is exactly the opposite", too high a pretension, if not properly controlled or accidentally overloaded, will also often lead to collapse of the material and failure of the joint. Therefore, it is very important to accurately determine the pretension of the bolt. Although automatic bolt assembly is available in many fields with the development of automation technology, manual operation is still required in some special fields and industries or in some special structures. Thus, the country also has many "national craftsmen" who are particularly situated in different professions. The excellent manual techniques of the craftsmen in the large country also need to be inherited, which forms a culture mode of 'teachers and vain'. In the project of teaching teachers and parents to cultivate brothers, theoretical knowledge can be taught, and actual technologies can be guided by hands, but for some special connecting structures which are extremely narrow in space, cannot be guided by hands and the like, in the training process, the condition that the brothers cannot completely master the operating skills of the teachers and parents and the training purpose is difficult to achieve exists.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an auxiliary teaching system and method for assembling a bolt connecting piece.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a bolt connecting piece assembly auxiliary teaching system comprises a pressure sensor, a data acquisition unit, a computer and a display;
the pressure sensor is used for collecting the pressure applied to the bolt connecting assembly in the process of screwing the nut in real time and transmitting a signal to the data collector;
the data acquisition unit receives the signals transmitted by the pressure sensor, collects and records the real-time resistance value of the pressure sensor and transmits the resistance signals to the computer;
the computer comprises a memory and a reference curve generation module;
the memory is used for storing a curve of the resistance value of the pressure sensor, which is acquired during each training, along with the change of time to form a data set; the reference curve generation module selects data from a data set stored in a database as a reference curve according to engineering requirements;
the display displays a curve of the resistance value over time.
Furthermore, the pressure sensor is a thin film piezoresistive pressure sensor, and a sensitive element is made of a carbon nano film or carbon nano paper. However, the actual application is not limited to the piezoresistive pressure sensor, and the form of the pressure sensor can be selected according to the actual situation in engineering so as to achieve the purpose of technical training.
Further, the reference curve generation module can simulate the curve of the resistance value of the pressure sensor changing along with time through a mathematical modeling method to serve as the reference curve.
Furthermore, the reference curve generation module displays the obtained reference curve through a display, and displays the curve which is acquired in real time during training and changes with time of the resistance value of the pressure sensor in the same coordinate system.
On the other hand, the invention also provides a method for performing auxiliary teaching of bolt connecting piece assembly by adopting the auxiliary teaching system for bolt connecting piece assembly, which comprises the following steps:
step 1: installing a pressure sensor between a nut and a connecting piece in the bolt connecting assembly;
step 2: generating a reference curve during training by a reference curve generating module;
and step 3: during training, a student controls a data acquisition unit to acquire the resistance value of the pressure sensor in real time by a computer in the process of screwing the nut of the bolt connecting assembly;
and 4, step 4: the method comprises the following steps that a curve of the resistance value of the pressure sensor changing along with time obtained in real time in the trainee training process and a reference curve are displayed on a display under the same coordinate system;
and 5: the student compares the curve of the resistance value of the pressure sensor changing along with the time obtained in real time in the training process with a reference curve, and adjusts the force in the tightening process, namely, the aim of assisting teaching is achieved.
Further, the method for generating the reference curve during training by the reference curve generation module is as follows: selecting data from a data set stored in a database as a reference curve according to engineering requirements; or simulating the time-varying curve of the resistance value of the pressure sensor as a reference curve by a mathematical modeling method.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
1. the system and the method provided by the invention overcome the problem that teachers and parents cannot teach or brother with hands when the teachers and parents are in the assembly of special structures with narrow space and the like in the process of training the brother;
2. the system of the invention has simple structure, convenient assembly and manufacture, uncomplicated data processing and visual presentation.
3. The piezoresistive film pressure sensor made of the nano material has the advantages of small thickness, customizable size and shape and good corrosion resistance.
Drawings
FIG. 1 is a schematic structural diagram of an auxiliary teaching system for bolt connection assembly according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a position installation situation of a bolt connection assembly and a pressure sensor according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a situation of too small force during trainee training according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating the situation of excessive training of trainees in the embodiment of the present invention;
FIG. 5 is a diagram illustrating a situation that a trainee exercises with a small force first and then a large force;
fig. 6 is a schematic diagram of the situation that the trainee exercises first in strength and then in strength in the embodiment of the invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
As shown in fig. 1, the bolt joint fitting assistant teaching system in the present embodiment is as follows.
The system comprises a pressure sensor, a data acquisition unit, a computer and a display;
the pressure sensor is used for collecting the pressure applied to the bolt connecting assembly in the process of screwing the nut in real time and transmitting a signal to the data collector;
the data acquisition unit receives the signals transmitted by the pressure sensor, collects and records the real-time resistance value of the pressure sensor and transmits the resistance signals to the computer;
the computer comprises a memory and a reference curve generation module;
the memory is used for storing a curve of the resistance value of the pressure sensor, which is acquired during each training, along with the change of time to form a data set; the reference curve generation module selects data from a data set stored in a database as a reference curve according to engineering requirements;
the display displays a curve of the resistance value over time.
Furthermore, the pressure sensor is a thin film piezoresistive pressure sensor, and a sensitive element is made of a carbon nano film or carbon nano paper. However, the actual application is not limited to the piezoresistive pressure sensor, and the form of the pressure sensor can be selected according to the actual situation in engineering so as to achieve the purpose of technical training.
In this embodiment, the pressure sensor is a circular thin film piezoresistive pressure sensor, a circular hole is formed in the center of the circle, the diameter of the hole is larger than that of the screw and smaller than that of the nut, so that the pressure sensor can be sleeved on the screw and cannot fall off, the installation structure of the pressure sensor is as shown in fig. 2, the screw penetrates through the connected piece a and the connected piece B, the pressure sensor is sleeved on the screw, and finally the nut is screwed in.
Further, the reference curve generation module can simulate a curve of the resistance value of the pressure sensor along with time through a mathematical modeling method to serve as a reference curve.
In this embodiment, the reference curve model obtained by the mathematical modeling method is:
R＝-0.35+18.75×t-3.2×t^2+0.13×t^3
where t is the sampling time.
Furthermore, the reference curve generation module displays the obtained reference curve through a display, and displays the curve which is acquired in real time during training and changes with time of the resistance value of the pressure sensor in the same coordinate system.
On the other hand, the invention also provides a method for performing auxiliary teaching of bolt connecting piece assembly by adopting the auxiliary teaching system for bolt connecting piece assembly, which comprises the following steps:
step 1: installing a pressure sensor between a nut and a connecting piece in the bolt connecting assembly;
step 2: generating a reference curve during training by a reference curve generating module;
and step 3: during training, a student controls a data acquisition unit to acquire the resistance value of the pressure sensor in real time by a computer in the process of screwing the nut of the bolt connecting assembly;
and 4, step 4: the curve of the resistance value of the pressure sensor changing along with time obtained in real time in the training process of the student and a reference curve are displayed on the display under the same coordinate system;
and 5: the student compares the curve of the resistance value of the pressure sensor changing along with the time obtained in real time in the training process with a reference curve, and adjusts the force in the tightening process, namely, the aim of assisting teaching is achieved.
Further, the method for generating the reference curve during training by the reference curve generation module is as follows: selecting data from a data set stored in a database as a reference curve according to engineering requirements; or simulating the time-varying curve of the resistance value of the pressure sensor as a reference curve by a mathematical modeling method.
In this embodiment, the pair of the reference curve obtained by the trainee through multiple trainings and the curve obtained in real time during the trainings is shown in fig. 3, 4, 5 and 6, wherein the resistance of the sensor is lower than that of the reference curve in the whole during the assembling process of the trainee shown in fig. 3, which indicates that the strength of the trainee is too small. Therefore, the trainee needs to increase the force in the later assembling process and continuously adjust until the trainee fits the reference curve. Figure 4 shows the student during the assembly process with the resistance of the sensor being overall higher than the reference curve, which indicates that the student is overly aggressive. Therefore, the trainee needs to reduce the force in the later assembling process and continuously adjust until fitting with the reference curve. Fig. 5 shows the student assembling the resistance of the sensor as a whole below the reference curve and then above the reference curve, which indicates that the student's force is too low and then too high. Therefore, the trainee needs to increase the force and then decrease the force in the later assembly process, and continuously adjust the force until the force is matched with the reference curve. Fig. 6 shows the student during the assembly process, the resistance of the sensor is generally higher than the reference curve and then lower than the reference curve, which indicates that the student is too much and then too little. Therefore, the trainee needs to reduce the force and then increase the force in the later assembling process, and continuously adjust the force until the force is matched with the reference curve.
Of course, in the assembling process of the student, the variation of the resistance value of the sensor may be various, but the change of the resistance value of the sensor can be compared with the reference curve in the assembling process according to the variation of the resistance value of the sensor, so as to judge the skill and force of the student, make corresponding adjustment, and finally achieve the purpose of fitting the curves together, that is, to say, the assembling skill and force of the student are consistent with the reference curve, that is, the final cultivation purpose is achieved.
Claims (6)
1. A bolt connecting piece assembly auxiliary teaching system is characterized by comprising a pressure sensor, a data acquisition unit, a computer and a display;
the pressure sensor is used for collecting the pressure applied to the bolt connecting assembly in the process of screwing the nut in real time and transmitting a signal to the data collector;
the data acquisition unit receives the signals transmitted by the pressure sensor, collects and records the real-time resistance value of the pressure sensor and transmits the resistance signals to the computer;
the computer comprises a memory and a reference curve generation module;
the memory is used for storing a curve of the resistance value of the pressure sensor, which is acquired during each training, along with the change of time to form a data set; the reference curve generation module selects data from a data set stored in a database as a reference curve according to engineering requirements;
the display displays a curve of the resistance value over time.
2. The bolt connector assembly assistant teaching system according to claim 1, wherein the pressure sensor is a thin film piezoresistive pressure sensor, and the sensing element is made of carbon nano-film or carbon nano-paper.
3. The bolt connector assembly auxiliary teaching system according to claim 1, wherein the reference curve generation module simulates a curve of a resistance value of the pressure sensor with time as a reference curve by a mathematical modeling method.
4. The bolt connecting piece assembly auxiliary teaching system according to claim 1 or 3, wherein the reference curve generation module displays the obtained reference curve through a display, and displays the curve of the resistance value of the pressure sensor, which is acquired in real time during training, with the change with time in the same coordinate system.
5. The method for teaching aid in assembly of bolted connections using the system for teaching aid in assembly of bolted connections of claim 4, comprising the steps of:
step 1: installing a pressure sensor between a nut and a connecting piece in the bolt connecting assembly;
step 2: generating a reference curve during training by a reference curve generating module;
and step 3: during training, a student controls a data acquisition unit to acquire the resistance value of the pressure sensor in real time by a computer in the process of screwing the nut of the bolt connecting assembly;
and 4, step 4: the method comprises the following steps that a curve of the resistance value of the pressure sensor changing along with time obtained in real time in the trainee training process and a reference curve are displayed on a display under the same coordinate system;
and 5: the student compares the curve of the resistance value of the pressure sensor changing along with the time obtained in real time in the training process with a reference curve, and adjusts the force in the tightening process, namely, the aim of assisting teaching is achieved.
6. The method for assisting in teaching bolt joint assembling according to claim 5, wherein the method for generating the reference curve during training by the reference curve generation module is: selecting data from a data set stored in a database as a reference curve according to engineering requirements; or simulating the time-varying curve of the resistance value of the pressure sensor as a reference curve by a mathematical modeling method.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210268896.6A CN114593859A (en) | 2022-03-18 | 2022-03-18 | Bolt connecting piece assembly auxiliary teaching system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210268896.6A CN114593859A (en) | 2022-03-18 | 2022-03-18 | Bolt connecting piece assembly auxiliary teaching system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116067555A (en) * | 2023-04-06 | 2023-05-05 | 西南交通大学 | Bolt looseness detection system and method for urban rail transit and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107192494A (en) * | 2017-05-14 | 2017-09-22 | 北京工业大学 | A kind of device and method for the measure axial bolts relaxation for considering Contact characteristics |
| CN107271097A (en) * | 2017-06-09 | 2017-10-20 | 北京工业大学 | A kind of device and method of real-time measurement bolt clamping force decay |
| CN215341561U (en) * | 2021-06-28 | 2021-12-28 | 芜湖市奇瑞汽车职业培训学校 | Screwing up evaluation system |
-
2022
- 2022-03-18 CN CN202210268896.6A patent/CN114593859A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107192494A (en) * | 2017-05-14 | 2017-09-22 | 北京工业大学 | A kind of device and method for the measure axial bolts relaxation for considering Contact characteristics |
| CN107271097A (en) * | 2017-06-09 | 2017-10-20 | 北京工业大学 | A kind of device and method of real-time measurement bolt clamping force decay |
| CN215341561U (en) * | 2021-06-28 | 2021-12-28 | 芜湖市奇瑞汽车职业培训学校 | Screwing up evaluation system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116067555A (en) * | 2023-04-06 | 2023-05-05 | 西南交通大学 | Bolt looseness detection system and method for urban rail transit and storage medium |
| CN116067555B (en) * | 2023-04-06 | 2023-06-23 | 西南交通大学 | Bolt looseness detection system and method for urban rail transit and storage medium |
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