CN108917997A - A kind of connecting component stress mornitoring system suitable for small space - Google Patents
A kind of connecting component stress mornitoring system suitable for small space Download PDFInfo
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- CN108917997A CN108917997A CN201810842442.9A CN201810842442A CN108917997A CN 108917997 A CN108917997 A CN 108917997A CN 201810842442 A CN201810842442 A CN 201810842442A CN 108917997 A CN108917997 A CN 108917997A
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- stress
- component
- connecting element
- mechanical connecting
- signal
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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
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
- G01L1/2268—Arrangements for correcting or for compensating unwanted effects
- G01L1/2281—Arrangements for correcting or for compensating unwanted effects for temperature variations
Abstract
The invention discloses a kind of connecting component stress mornitoring systems suitable for small space, and structure is by stress measuring means；Stress monitoring mechanism and connection structure composition；When mechanical connecting element is by stress, deformation occurs for it, since distortion measurement component both ends are fixed in the effective stress interval range of mechanical connecting element, distortion measurement component will occur and the deformation of mechanical connecting element equal proportion, the form that the deformation of distortion measurement component can be converted into electric signal is transmitted, and pass through the comprehensive function of integrated data input/output port, signal conversion device, calibration record component, it is calculated according to dependent equation, it can get the stress condition of mechanical connecting element, and be shown on terminal processes controller, complete stress monitoring function；Rationally, cost is relatively low for the design of present apparatus system, and easy to operate, signal is accurate and is easy to read.
Description
Technical field
The present invention relates to stress mornitoring fields, and in particular, to a kind of connecting component stress inspection suitable for small space
Examining system.
Background technique
In engineering and scientific research project, the stress monitoring of connecting component is the important indicator of safeguards system safety in operation.
In engineering, the stress monitoring of connecting component is realized in turn generally by the deformation of measurement connecting component.Common measurement
Equipment has：Foil gauge, High-precision image instrument.For foil gauge, 5mm need to be greater than by needing to measure Spatial General 6 R, separately need to survey
Line is controlled, simultaneously for high temperature measurement, is needed separately with several temperature elements and corresponding observing and controlling line, to correct last calculated result.It is high
Precision image instrument is image analysis to be carried out for connecting component deformation position, and then determine the deformation of connecting component.And in reality
In the case of border, for being similar to equipment sealing bolt, pipe flange connection bolt etc., it is usually present narrow space, connecting component
The outer not applicable connecting component to narrow space of the methods of equipment or image analysis that increases carries out stress monitoring.
Summary of the invention
The present invention is directed to the existing status for being difficult to monitor, and provides a kind of connecting component stress inspection suitable for small space
Examining system, the present invention combine connecting component and sensor, can be widely applied to all kinds of radial directions such as bolt and threaded connection and axis
To the stress monitoring of connecting component.
There are many prior arts in terms of connecting component stress monitoring：
Such as patent CN103335588A provides a kind of measurement method of high-pressure closed vessel apparatus casing deformation, especially
It designs a kind of for the closed containers class electrical equipment shell distortion measurement application field such as power capacitor, oil-immersed transformer
The measurement method of high-pressure closed vessel apparatus casing deformation：Capacitor case deformation is converted analog signal electricity by strain gauge bridge
Increment value Δ Ra, Δ Rb are hindered, analog signal resistance delta value is exported by conditioning circuit to microcontroller, and microcontroller sampling is defeated
Enter signal and calculates the measured value of deformation, the temperature value of microcontroller temperature collection sensor, calculable capacitor shell deformation
Temperature compensation value, and deformation values are finally calculated, accurately obtain high-pressure closed vessel apparatus casing deformation values, and calculate and marking
Linearity calibration and zero point correction are carried out to distortion measurement tool under quasi- test environment.This method is suitable for electric appliance apparatus casing
Distortion measurement, monitoring result are deformation values, are that stress value has essence different from monitoring object of the present invention.Meanwhile the present invention adopts
With built-in structure, and the invention is using external monitoring layout, and the two has fundamental difference in structure and testing result.The hair
The bright stress mornitoring for being not applied for compact mechanical connecting element.
A kind of for another example method that can accurately measure hyperthermia stress-strain of patent CN101206148A, the patent are utilized and are demarcated
High temperature strain foil, component scene is measured under high temperature environment, so obtain components stress situation.This method is only
Single-point is measured, the whole measurement of components set objective is not applied for.This patent uses more for whole measurement
The measurement in point temperature field, solves the drawbacks of measurement range of the patent.This patent uses built-in detecting structure simultaneously, using stick
Shape or block-like distortion measurement equipment, meet and answer narrow space, are not suitable under the occasion for arranging foil gauge, stress mornitoring
Demand.
For another example article " A Methodology For On-Line Calculation Of Temperature And
Thermal Stress For Machine Components And Structures " is described, and this article provides a kind of machine
The scheme of tool equipment integrated stress verification.Integral Thought is to demarcate in advance to mechanical equipment and component, then on-line measurement
As a result it is calculated.When this method carries out stress monitoring for especially important equipment, logic calculation is particularly useful, but expends
It is higher.This patent in terms of logic calculation, using fitting function scheme, does not use interpolation method described in this article using numerical procedure
It is calculated, theoretically, improves a certain amount of measurement accuracy.In measurement scheme, this article the method need to arrange more
A sensing point, structure are complex, it is difficult to which, suitable for the whole monitoring of big system, the present invention uses integrated design, solves
The problems such as later period wiring signal transmitting of scheme described in this article.
For another example patent CN201410850516 provides a kind of stress distribution monitoring device and method, monitoring device are main
Holding circuit, multiway analog switch, A/D converter are used by piezoelectric fabric, Dynamic Signal amplifier, charge amplifier, signal
Constituted with microprocessor, monitoring method be by more piezoelectric fabric cross-distribution networkings on needing the structure member that detects,
The piezoelectricity information that perceptual structure component stress deformation generates determines the stress of structure member by the information processing of decussating fibers
Distribution.This monitoring method can analyze the stress distribution of mechanical and other structure members in real time, excessive to structure stress is avoided
And it is broken and has great importance.The patent is mainly using the method for more piezoelectric fabrics detection.The invention is for big deformation quantity
Monitoring has larger restriction, is not suitable for the mechanical connection situation of such as soft seal.Simultaneously because be planar design in structure, it is uncomfortable
The stress monitoring of irregular mechanical connecting element for small space.And the present invention is using built-in rodlike or block structure
Distortion measurement component solves the problems, such as the invention.
It is an object of the invention to overcome above-mentioned prior art disadvantage, a kind of interconnecting piece suitable for small space is provided
Part stress mornitoring system.The present invention can be divided into structure：Stress measuring means；Stress monitoring mechanism and connection structure.Pass through
Increase stress monitoring component and equipment, to complete the stress mornitoring of mechanical connecting element.It the composite can be widely applied to important machine
The stress monitoring of tool connecting component.
The present invention can be divided into structure：Stress measuring means；Stress monitoring mechanism and connection structure.Wherein stress measurement
Mechanism includes：Mechanical connecting element；Distortion measurement component；Temperature feedback device；Insulating element；Signal-powered mechanical connecting element；
Calibration record component.
Mechanical connecting element completes the connection function between component.In distortion measurement component layout and mechanical connecting element,
It is arranged along mechanical connecting element Impact direction, the material of distortion measurement component is selenium-tellurium alloy, and material feature is once to occur
Slight deformation will make its resistance biggish variation occur.Distortion measurement component includes that signaling interface and digital-to-analogue conversion connect
Mouthful, it can be by the resistance value of measurement deformable member, by the temperature feedback of temperature feedback device as a result, measurement result is converted into machine
The stress value size of tool connecting component.Insulating element mainly completes distortion measurement component, temperature feedback device and mechanical connecting element
Between electric insulation, be isolated relevant interference signal.Signal-powered mechanical connecting element is more socket aviation plugs and accordingly draws
Line composition, accomplishes distortion measurement component, temperature feedback device, the signal wire of calibration record component and supply lines and stress monitoring
The effect that the corresponding wiring of mechanism is connected.Calibration record component minute book stress measuring means calibration result, number, calibration date etc.
Important information, corresponding information are connect by signal-powered mechanical connecting element with stress monitoring mechanism, achievable upload information and
Update the function of corresponding information.
Stress monitoring mechanism mainly includes：Display, power supply, signal acquisition transmission board, data recordin module,
Four parts of logic calculation module.Display display measurement stress intensity, calibration value etc. and stress monitoring relevant information.Power supply electricity
Power supply needed for source provides stress measurement component and temperature feedback device, and have the function of signal isolation, different power units are isolated
Effect of signals can provide stable voltage and current according to power unit demand.Signal acquisition transmission board collect deformable member,
Temperature feedback device and calibration record component feedback information, are transmitted to logic calculation module and data recordin module.Logic calculation mould
Root tuber is computed acquisition stress value, and be transmitted to data recordin module according to the resistance signal and part temperatures of acquisition.Data record
Module records such as stress value, time of measuring important parameter, and accordingly result is fed back to the calibration record of stress measuring means
Component, to complete data more new function.Above data transmission mode can be used wireless transmission and carry out.Basic structure letter of the present invention
It is single, be based on metallic character, can be applied under the conditions of harsh environment after calibrated, it is online under off-line state, complete mechanical link
Part stress monitoring.Application prospect of the present invention is extensive, can be widely applied to the fields such as nuclear power, wind-powered electricity generation, thermoelectricity, chemical industry, petroleum and answers
Power monitoring requirements mechanical connecting element.Rationally, cost is relatively low, easy to operate for this system design.
One or more technical solution provided by the present application, has at least the following technical effects or advantages：
The present invention completes the measurement of mechanical connecting element deformation quantity by mechanical connecting element distortion measurement component；
The present invention is important by calibration record component minute book stress measuring means calibration result, number, calibration date etc.
Information completes upload information and updates the function of corresponding information；
The present invention, according to the resistance signal and part temperatures of acquisition, is computed and is mechanically connected by logic calculation module
Component stress value, and it is transmitted to data recordin module；
Measurement structure of the present invention is built in the mode of fastener, solves the problems, such as externally measured component occupied space, real
Showed a kind of connecting component stress mornitoring system suitable for small space, realize mechanical connecting element it is online offline stress
Monitoring function；In short, this system can be applied to can be widely applied to the fields such as nuclear power, wind-powered electricity generation, thermoelectricity, chemical industry, petroleum to answer
Power monitoring requirements mechanical connecting element stress monitoring system.Rationally, cost is relatively low, easy to operate for the design of present apparatus system.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention；
Fig. 1 is the stress monitoring system schematic diagram suitable for mechanical connecting element；
In Fig. 1,1- mechanical connecting element connects head end, and 2- mechanical connecting element connects tail end, 3- insulating element, 4- deformation
Measuring part connecting pin, 5- temperature feedback device, 6- integrated data input/output port, 7- signal conversion device, 8- mechanical fastener, 9-
Distortion measurement component, 10- calibration record component, 11- terminal processes controller.
Specific embodiment
To better understand the objects, features and advantages of the present invention, with reference to the accompanying drawing and specific real
Applying mode, the present invention is further described in detail.It should be noted that in the case where not conflicting mutually, the application's
Feature in embodiment and embodiment can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also
Implemented with being different from the other modes being described herein in range using other, therefore, protection scope of the present invention is not by under
The limitation of specific embodiment disclosed in face.
Referring to Fig. 1, it is several that 9 distortion measurement component both ends 1,2 are disposed with 5- temperature feedback device, and is connected to 6 integrated datas
Input/output port arranges 3 insulating elements on the outside of 5- temperature feedback device, and insulating element plays electric insulation, isolation signals influence,
And connection function, 9 distortion measurement components are fixed on 8- mechanical connecting element by connection types such as such as screw threads.At this time 9
There are proportional relations for distortion measurement component deformation quantity and 8 mechanical connecting element deformation quantities.6 integrated data input/output ports are by 9 shapes
Become measuring part deformation quantity to be transmitted to by way of electric signal in 7 signal conversion devices, while new number of 5- temperature feedback device passes through
6- integrated data input/output port is transmitted in 7 signal conversion devices.7 signal conversion devices are by these signals and 10- calibration record portion
Part internal calibration data are converted to connecting component stress result, and are transmitted to 11- terminal control unit, show stress on terminal control unit
As a result, calibration result can be simultaneously transmitted on 10 calibration record components.Connecting component Stress calculation equation is as follows：
F=fT(T)×La/Lx×fx(δ)
Wherein：fT(T) be mechanical connecting element stress Temperature affection factor (unit 1), only with mechanical link
The material of part is related；LaIt is effective stressed length of mechanical connecting element；LxIt is the effective stressed length of distortion measurement component, fx(δ)
It is function of the distortion measurement component stress value about deformation signal δ.
Use example 1：Calibration process
After mechanical connecting element is installed distortion measurement component, calibration need to be individually carried out.Calibration process is test
Machine successively at different temperatures, after applying different stress, obtains the stress Temperature affection factor f of mechanical connecting elementT(T) letter
Number, and by terminal control unit, by function transfer into 10 calibration record components.Complete calibration.
Use example 2：Monitoring process
When mechanical connecting element is by stress, deformation occurs, since mechanical connect is fixed at distortion measurement component both ends
In the effective stress interval range of relay part, distortion measurement component will occur and the deformation of mechanical connecting element equal proportion, and deformation is surveyed
The form that the deformation of amount component can be converted into electric signal is transmitted, and passes through the comprehensive function of 6,7,10 components, according to correlation
Equation calculation, can get the stress condition of mechanical connecting element, and be shown on terminal processes controller, complete stress monitoring function
Energy.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (9)
1. a kind of connecting component stress mornitoring system suitable for small space, which is characterized in that the system comprises：
Stress measuring means, stress monitoring mechanism and connection structure；Wherein, stress measuring means include：Mechanical connecting element, shape
Become measuring part, temperature feedback device, insulating element, signal-powered mechanical connecting element, calibration record component；Mechanical connecting element
The connection between component is completed, distortion measurement component layout is in mechanical connecting element, along mechanical connecting element Impact direction cloth
It sets；Distortion measurement component passes through the resistance value of measurement deformable member, by the temperature feedback of temperature feedback device as a result, measurement is tied
Fruit is converted into the stress value size of mechanical connecting element；Insulating element is for completing distortion measurement component, temperature feedback device and machine
Relevant interference signal is isolated in electric insulation between tool connecting component；Signal-powered mechanical connecting element is used for distortion measurement
Component, temperature feedback device, the signal wire of calibration record component and supply lines wiring corresponding to stress monitoring mechanism are connected；Calibration note
Record component is used to record the relevant information of stress measuring means；
Stress monitoring mechanism includes：Display, power supply, signal acquisition transmission board, data recordin module, logic calculation mould
Block；Display is for showing stress monitoring relevant information；Electricity needed for power supply provides stress measurement component and temperature feedback device
Source；Signal acquisition transmission board for collecting distortion measurement component, temperature feedback device and calibration record component feedback information, transmit
To logic calculation module and data recordin module；Logic calculation module is computed according to the resistance signal and part temperatures of acquisition
Stress value is obtained, and is transmitted to data recordin module；Data recordin module records relevant parameter, and accordingly result is fed back to and is answered
The calibration record component of power measuring mechanism, to complete data more new function.
2. the connecting component stress mornitoring system according to claim 1 suitable for small space, which is characterized in that deformation
The material of measuring part is selenium-tellurium alloy.
3. the connecting component stress mornitoring system according to claim 1 suitable for small space, which is characterized in that deformation
Measuring part includes signaling interface and digital-to-analogue conversion interface.
4. the connecting component stress mornitoring system according to claim 1 suitable for small space, which is characterized in that signal
Power supply mechanical connecting element include：More socket aviation plugs and respective lead.
5. the connecting component stress mornitoring system according to claim 1 suitable for small space, which is characterized in that calibration
Recording-member is used to record the calibration result, number, calibration date information of stress measuring means.
6. the connecting component stress mornitoring system according to claim 1 suitable for small space, which is characterized in that power supply
Power supply has the function of signal isolation, and the effect of signals of different power units is isolated.
7. the connecting component stress mornitoring system according to claim 1 suitable for small space, which is characterized in that display
Device display measurement stress intensity, calibration value.
8. the connecting component stress mornitoring system according to claim 1 suitable for small space, which is characterized in that data
Logging modle records stress value, time of measuring parameter.
9. the connecting component stress mornitoring system according to claim 1 suitable for small space, which is characterized in that connection
Component stress accounting equation is as follows：
F=fT(T)×La/Lx×fx(δ)
Wherein：fT(T) be mechanical connecting element stress Temperature affection factor, it is related with the material of mechanical connecting element；LaIt is machine
Effective stressed length of tool connecting component；LxIt is the effective stressed length of distortion measurement component, fx(δ) is distortion measurement component stress
It is worth the function about deformation signal δ.
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| CN201810842442.9A CN108917997B (en) | 2018-07-27 | 2018-07-27 | Adapting unit stress detecting system suitable for narrow and small space |
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| CN201810842442.9A CN108917997B (en) | 2018-07-27 | 2018-07-27 | Adapting unit stress detecting system suitable for narrow and small space |
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