CN112360860B - Threaded hole structure capable of accurately measuring threaded connection state in real time - Google Patents
Threaded hole structure capable of accurately measuring threaded connection state in real time Download PDFInfo
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- CN112360860B CN112360860B CN202011232146.0A CN202011232146A CN112360860B CN 112360860 B CN112360860 B CN 112360860B CN 202011232146 A CN202011232146 A CN 202011232146A CN 112360860 B CN112360860 B CN 112360860B
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- 238000005259 measurement Methods 0.000 claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims abstract description 15
- 239000004973 liquid crystal related substance Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 238000003754 machining Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 238000005457 optimization Methods 0.000 abstract 1
- 238000013461 design Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B33/00—Features common to bolt and nut
- F16B33/02—Shape of thread; Special thread-forms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B37/00—Nuts or like thread-engaging members
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
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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
- G01L1/16—Measuring force or stress, in general using properties of piezoelectric devices
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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
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
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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
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention discloses a threaded hole structure capable of accurately measuring a threaded connection state in real time, which comprises a threaded hole structure, a strain measurement module, a transmission module and a single chip microcomputer module; the thread hole structure increases the diameter of a root circle on the basis of a standard thread hole, so that the major diameter of the thread hole structure is larger than that of the corresponding standard thread hole, a part of thread-shaped space is reserved in the thread hole structure, and a strain sensor is attached to the inner wall of the reserved thread-shaped space; according to the invention, the stress and strain data of the threaded connection can be tracked and measured through the strain sensor tightly attached to the inner wall of the threaded hole, so that the purpose of monitoring the fastening state of the threads in real time and the aim of assisting the space optimization arrangement of the screws are achieved.
Description
Technical Field
The invention belongs to the technical field of mechanical engineering, and particularly relates to a threaded hole structure capable of accurately measuring a threaded connection state in real time, which is suitable for monitoring the connection state of threaded connection in real time and autonomously, judging the reliability of the threaded connection and assisting in deciding the optimal spatial arrangement of the threaded connection.
Background
Threaded connections are a very common connection method, and a large number of threaded connections are used in many large-scale devices such as airplanes, aircrafts, ships, and the like. The existing technical means is difficult to detect the connection state of the threaded connection in real time and independently, and the reliability of the threaded connection is mainly checked manually when an instrument stops working. However, the real-time and autonomous acquisition of the stress and strain data of the threads can realize safer and more comprehensive thread state monitoring, and is very important for monitoring the connection state and the running state of equipment in real time
According to the invention, the stress-strain data of the threaded connection is directly measured through the threaded hole structure, so that the connection state of the threaded connection is monitored in real time and autonomously.
The stress-strain state of the threaded connection of the direct measurement equipment brings great convenience for people to know the equipment state. By adopting the threaded hole structure, real-time and autonomous detection of the threaded connection state can be realized on the premise of not influencing the original connection strength, and an optimized screw space arrangement mode can be found. The requirement of aircraft, bridge, building etc. to the security in reality is very high, uses the helicitic texture that can direct measurement strain stress to have more real-time, comprehensive understanding to their safe state to make reasonable prediction and judgement, thereby very big promotion the security of equipment, reach effectual reduction in production cost and improve the target of design rationality.
Disclosure of Invention
The present invention is directed to a threaded hole structure capable of accurately measuring a threaded connection state in real time, so as to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a threaded hole structure capable of accurately measuring a threaded connection state in real time comprises a threaded hole structure, a strain measurement module, a transmission module and a single chip microcomputer module, wherein the strain measurement module is tightly attached to the inner wall of a threaded space of the threaded hole structure, the strain measurement module is electrically connected with the transmission module, and the transmission module is electrically connected with the single chip microcomputer module;
the thread hole structure increases the diameter of the root circle on the basis of corresponding to a standard thread hole, so that the major diameter of the thread hole structure is larger than that of the corresponding standard thread hole, a part of thread-shaped space is reserved in the thread hole structure, and a strain sensor can be attached to the thread-shaped inner hole space;
the strain sensor is tightly attached to the inner wall of the threaded hole space in a threaded manner, and the threads connected with the threaded hole cannot touch the strain sensor.
Preferably, the threaded hole structure meets the requirements of strength and rigidity standard parameters.
Preferably, the strain sensor can be a piezoelectric or photoelectric sensor.
Preferably, the single chip microcomputer module comprises a single chip microcomputer, an A/D converter, a liquid crystal display, a numerical value setting button and an alarm;
the liquid crystal display is used for displaying strain and stress values output by the singlechip;
the numerical value setting button is used for setting strain and stress thresholds which can be borne by threaded connection at the threaded hole structure according to actual conditions by a user;
the alarm gives an alarm when the strain and stress values measured by the threaded hole structure are larger than the threshold set by a user.
Preferably, the method for measuring the pressure in real time through the threaded hole structure comprises the following steps:
the method comprises the following steps: processing a threaded hole structure in the object by using threaded hole processing equipment, and tightly attaching a strain sensor to the inner wall of a threaded space of the threaded hole structure;
step two: the strain sensor sends out the measured strain value through the data transmission module;
step three: the operational amplifier amplifies the strain sensor original signal received by the singlechip to the electrical signal which is enough to be identified and received by the data acquisition card, and the A/D converter converts the analog signal into a digital signal;
step four: calculating a stress value according to the obtained strain value by a strain stress conversion algorithm;
step five: the liquid crystal display displays the strain and stress values output by the single chip microcomputer, compares a threshold value set by a user with a non-standard threaded hole measured value in real time and judges whether to give an alarm or not.
Has the advantages that:
(1) according to the threaded hole structure capable of accurately measuring the threaded connection state in real time, the adopted threaded hole structure increases the diameter of the root circle on the basis of corresponding to a standard threaded hole, and normal connection and use performance among threads are not affected; the strain sensor which is in close contact with the inner wall of the threaded hole can directly measure the strain of threaded connection, and the purpose of real-time and autonomous accurate measurement is achieved.
(2) According to the threaded hole structure capable of accurately measuring the threaded connection state in real time, the strain sensor is arranged inside the threaded hole, noise caused by external interference is avoided, and the measuring result is reliable and accurate.
(3) According to the threaded hole structure capable of accurately measuring the threaded connection state in real time, the threshold value is set through the numerical value setting button, and when the measured numerical value is larger than the set threshold value, the alarm immediately gives an alarm, so that the safe use state of equipment can be reported as early as possible, and the equipment is convenient to inspect, maintain and the like.
(4) According to the threaded hole structure capable of accurately measuring the threaded connection state in real time, the design parameters of the hole meet the corresponding requirements standards of strength, rigidity and the like, the connection task is completed, meanwhile, the digital modeling of the connection state of equipment is realized, and the threaded connection state can be monitored in real time and autonomously.
Drawings
Fig. 1 is a block diagram showing an overall structure of a threaded hole structure capable of precisely measuring a threaded connection state in real time according to the present invention.
Fig. 2 is a schematic cross-sectional view of a threaded hole structure capable of precisely measuring a threaded connection state in real time according to the present invention.
Fig. 3 is a schematic view of a threaded hole structure capable of precisely measuring a threaded connection state in real time according to the present invention.
Fig. 4 is a schematic diagram of the connection between the data transmission module of the threaded hole structure capable of precisely measuring the threaded connection state in real time and the single chip microcomputer.
Fig. 5 is a schematic view of a numerical display and alarm apparatus for a threaded hole structure capable of precisely measuring a threaded connection state in real time according to the present invention.
Fig. 6 is a control flowchart of a threaded hole structure capable of precisely measuring a threaded connection state in real time according to the present invention.
In the figure: 1-threaded hole structure, 11-thread-shaped space and 2-strain sensor.
Detailed Description
Embodiments of the present invention are further described below with reference to the accompanying drawings.
As shown in fig. 1-6, a threaded hole structure capable of precisely measuring a threaded connection state in real time and having functions of connecting and measuring a strain stress comprises a threaded hole structure 1, a strain measurement module, a data transmission module and a single chip microcomputer module, wherein the strain measurement module is tightly attached to the inner wall of a threaded space 11 of the threaded hole structure 1, the strain measurement module is electrically connected with the data transmission module, and the data transmission module is electrically connected with the single chip microcomputer module;
the thread hole structure increases the diameter of the root circle on the basis of corresponding to a standard thread hole, so that the major diameter of the thread hole structure is larger than that of the corresponding standard thread hole, a part of thread-shaped space is reserved in the thread hole structure, and a strain sensor can be attached to the thread-shaped inner hole space;
the strain sensor is tightly attached to the inner wall of the threaded hole space in a threaded manner, and the threads connected with the threaded hole cannot touch the strain sensor.
Preferably, the threaded hole structure meets the requirements of strength and rigidity standard parameters.
Preferably, the strain sensor can be a piezoelectric or photoelectric sensor.
Preferably, the single chip microcomputer module comprises a single chip microcomputer, an A/D converter, a liquid crystal display, a numerical value setting button and an alarm;
the liquid crystal display is used for displaying strain and stress values output by the singlechip;
the numerical value setting button is used for setting strain and stress thresholds which can be borne by threaded connection at the threaded hole structure according to actual conditions by a user;
the alarm gives an alarm when the strain and stress values measured by the threaded hole structure are larger than the threshold set by a user.
A method for measuring the threaded connection state in real time through a threaded hole structure comprises the following steps:
the method comprises the following steps: machining a threaded hole structure (1) in an object by using threaded hole machining equipment, and tightly attaching a strain sensor (2) to the inner wall of a threaded space (11) of the threaded hole structure (1);
step two: the strain sensor (2) sends out the measured strain value through the data transmission module;
step three: the operational amplifier amplifies the original signal of the strain sensor (2) received by the singlechip to the electrical signal which is enough to be identified and received by the data acquisition card, and the A/D converter converts the analog signal into a digital signal;
step four: calculating a stress value according to the obtained strain value by a strain stress conversion algorithm;
step five: the liquid crystal display displays the strain and stress values output by the single chip microcomputer, compares a threshold value set by a user with a non-standard threaded hole measured value in real time and judges whether to give an alarm or not.
The method mainly comprises the following four steps:
1. acquisition of signals:
the strain signal comes from a strain sensor tightly connected with the inner wall of the thread-like space.
2. And (3) transmission of signals:
and the strain value measured by the strain sensor is sent to the singlechip through the data transmission module.
3. And (3) processing signals:
the measured analog signal is amplified by an amplifying circuit, and then converted into a digital signal by an A/D converter. And the singlechip is used for filtering the obtained digital signal. The LCD displays the result, compares the set threshold value with the measured value in real time, and immediately responds to the interruption when the measured value is detected to be greater than or equal to the threshold value, cuts off the power supply and gives an alarm.
According to the threaded hole structure capable of accurately measuring the threaded connection state in real time, the adopted threaded hole structure increases the diameter of the root circle on the basis of corresponding to a standard threaded hole, and normal connection and use performance among threads are not affected; the strain sensor which is in close contact with the inner wall of the threaded hole can directly measure the strain of threaded connection, and the purpose of real-time and autonomous accurate measurement is achieved.
According to the threaded hole structure capable of accurately measuring the threaded connection state in real time, the strain sensor is arranged inside the threaded hole, noise caused by external interference is avoided, and the measuring result is reliable and accurate.
According to the threaded hole structure capable of accurately measuring the threaded connection state in real time, the threshold value is set through the numerical value setting button, and when the measured numerical value is larger than the set threshold value, the alarm immediately gives an alarm, so that the safe use state of equipment can be reported as early as possible, and the equipment is convenient to inspect, maintain and the like.
According to the threaded hole structure capable of accurately measuring the threaded connection state in real time, the design parameters of the hole meet the corresponding requirements standards of strength, rigidity and the like, the connection task is completed, meanwhile, the digital modeling of the connection state of equipment is realized, and the threaded connection state can be monitored in real time and autonomously.
The embodiments of the present invention have been described in detail, but the embodiments are merely examples, and the present invention is not limited to the above-described embodiments. Any equivalent modifications and substitutions to those skilled in the art are also within the scope of the present invention. Accordingly, equivalent alterations and modifications are intended to be included within the scope of the invention, without departing from the spirit and scope of the invention.
Claims (4)
1. The utility model provides a can real-time precision measurement threaded connection state's screw hole structure which characterized in that:
the thread hole structure comprises a thread hole structure (1) with the diameter of a root circle increased on the basis of a corresponding standard thread hole, a strain measurement module, a data transmission module and a single chip microcomputer module, wherein the strain measurement module is tightly attached to the inner wall of a thread of the thread hole structure (1), the strain measurement module is electrically connected with the data transmission module, and the data transmission module is electrically connected with the single chip microcomputer module;
the thread hole structure increases the diameter of the root circle on the basis of the corresponding standard thread hole, so that the major diameter of the thread hole structure is larger than that of the corresponding standard thread hole, and a part of thread-shaped space (11) is reserved in the thread hole structure;
the strain measurement module comprises a strain sensor (2), and the strain sensor (2) is tightly attached to the inner wall of the thread-shaped space (11);
the strain sensor is tightly attached to the inner wall of the thread-shaped space (11) of the threaded hole structure (1) in a spiral shape, and the thread connected with the threaded hole cannot touch the strain sensor (2).
2. A threaded hole structure capable of accurately measuring a threaded connection state in real time according to claim 1, characterized in that:
the strain sensor (2) can be a piezoelectric type or photoelectric type strain sensor.
3. A threaded hole structure capable of accurately measuring a threaded connection state in real time according to claim 1, characterized in that:
the single chip microcomputer module comprises a single chip microcomputer, an A/D converter, a liquid crystal display, a numerical value setting button and an alarm;
the liquid crystal display is used for displaying the strain and stress values output by the singlechip;
the numerical value setting button is used for setting the stress strain threshold of the threaded fastener connected at the threaded hole structure according to actual conditions by a user;
the alarm gives an alarm when the stress strain value measured by the threaded hole structure is greater than a threshold value set by a user.
4. A method for measuring a threaded connection state in real time through a threaded hole structure, which is characterized in that the threaded hole structure capable of accurately measuring the threaded connection state in real time according to any one of claims 1 to 3 is adopted, and the method comprises the following steps:
the method comprises the following steps: machining a threaded hole structure (1) in an object by using threaded hole machining equipment, and tightly attaching a strain sensor (2) to the inner wall of a threaded space (11) of the threaded hole structure (1);
step two: the strain sensor (2) sends out the measured strain value through the data transmission module;
step three: the operational amplifier amplifies the original signal of the strain sensor (2) received by the singlechip to the electrical signal which is enough to be identified and received by the data acquisition card, and the A/D converter converts the analog signal into a digital signal;
step four: calculating a stress value according to the obtained strain value by a strain stress conversion algorithm;
step five: the liquid crystal display displays the strain and stress values output by the single chip microcomputer, compares a threshold value set by a user with a non-standard threaded hole measured value in real time and judges whether to give an alarm or not.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011232146.0A CN112360860B (en) | 2020-11-06 | 2020-11-06 | Threaded hole structure capable of accurately measuring threaded connection state in real time |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011232146.0A CN112360860B (en) | 2020-11-06 | 2020-11-06 | Threaded hole structure capable of accurately measuring threaded connection state in real time |
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| Publication Number | Publication Date |
|---|---|
| CN112360860A CN112360860A (en) | 2021-02-12 |
| CN112360860B true CN112360860B (en) | 2021-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011232146.0A Active CN112360860B (en) | 2020-11-06 | 2020-11-06 | Threaded hole structure capable of accurately measuring threaded connection state in real time |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH682762A5 (en) * | 1990-03-08 | 1993-11-15 | Schlaepfer Messtechnik Ag | Expansion measuring device for metal structures |
| US7520174B2 (en) * | 2006-08-24 | 2009-04-21 | Ronald C. Clarke | Method and apparatus for indicating a load |
| CN101793578A (en) * | 2010-02-10 | 2010-08-04 | 中国人民解放军63908部队 | Chock plug capable of protecting pressure sensor from being ablated |
| CN102278126A (en) * | 2011-04-29 | 2011-12-14 | 中铁第四勘察设计院集团有限公司 | Force testing method for connecting bolt of duct pieces in shield tunnel |
| TWI510769B (en) * | 2013-03-25 | 2015-12-01 | Kabo Tool Co | A screw that senses tension |
| CN103528537A (en) * | 2013-10-28 | 2014-01-22 | 天津摩尔工程材料实验室 | Thread detection device |
| CN111059123A (en) * | 2019-11-13 | 2020-04-24 | 南昌大学 | Bolt structure capable of measuring pressure and intensity of pressure in real time |
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