CN107063073B - Object deformation electromagnetic monitoring device and method - Google Patents
Object deformation electromagnetic monitoring device and method Download PDFInfo
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- CN107063073B CN107063073B CN201710234442.6A CN201710234442A CN107063073B CN 107063073 B CN107063073 B CN 107063073B CN 201710234442 A CN201710234442 A CN 201710234442A CN 107063073 B CN107063073 B CN 107063073B
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- 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
- G01B7/24—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in magnetic properties
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Abstract
The invention discloses an electromagnetic monitoring device and a method for object deformation, which adopts an electromagnetic nondestructive testing method, the device comprises a plurality of electromagnetic detection coils, an electromagnetic detection instrument and a monitoring data management system, the plurality of electromagnetic detection coils are distributed and fixed on the surface of a monitoring part of a monitored object in a cascading manner or embedded and fixed in the monitoring part, and are distributed and fixed in a linear array or a planar array or a space three-dimensional array manner according to the structural characteristics and the monitoring requirements of the monitoring part of the monitored object, wherein at least one electromagnetic detection coil is used as an excitation coil and is electrically connected with a signal excitation end of the electromagnetic detection instrument, the rest plurality of electromagnetic detection coils are used as a receiving coil and an excitation coil and are electrically connected with a signal receiving end of the electromagnetic detection instrument, and the change of induced current signal parameters of the plurality of electromagnetic detection coils electrically connected with the signal receiving end of the, the structure state change of the monitored part of the monitored object is indirectly monitored, a real-time and effective structure state change monitoring result can be obtained, and the method is particularly suitable for asymmetrical deformation monitoring work of symmetrical objects.
Description
Technical Field
The invention relates to a nondestructive monitoring device and a nondestructive monitoring method, in particular to an object deformation electromagnetic monitoring device and a method.
Background
Currently, the facility equipment structure health monitoring technology has extremely important application significance in the safe operation of the facility equipment. For example, in the operation process of facilities such as bridges, buildings, dams and the like, an effective monitoring technology is adopted to monitor the structural deformation change of the facilities, but no effective and reasonable monitoring technical means is applied to actual engineering so far.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an object deformation electromagnetic monitoring device and method, which adopt an electromagnetic nondestructive testing method to realize dynamic monitoring of deformation of an object.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides an object deformation electromagnetism monitoring devices, includes a plurality of electromagnetic detection coils, electromagnetic detection instrument, monitoring data management system, its characterized in that:
the electromagnetic detection coils are distributed and fixed on the surface of the monitored part of the monitored object in a cascading manner or embedded and fixed in the monitored part, and are distributed and fixed in a linear array or area array or space three-dimensional array manner according to the structural characteristics of the monitored part of the monitored object;
the cascade type refers to that: at least one electromagnetic detection coil is used as an excitation coil and is electrically connected with a signal excitation end of an electromagnetic detection instrument; the other electromagnetic detection coils are not only receiving coils but also exciting coils and are electrically connected with a signal receiving end of the electromagnetic detection instrument; the electromagnetic detection coils electrically connected with the signal receiving end of the electromagnetic detection instrument are used as the receiving coils to generate induction current and transmit the induction current to the electromagnetic detection instrument when the electromagnetic detection coils electrically connected with the signal excitation end of the electromagnetic detection instrument excite an alternating magnetic field, and the induction generated alternating magnetic field excites the next electromagnetic detection coil adjacent to the electromagnetic detection instrument to generate induction current and alternating magnetic field;
the electromagnetic detection instrument is electrically connected with the monitoring data management system.
An object deformation electromagnetic monitoring method adopts the device, and is characterized in that: the monitoring method comprises two processes of first calibration and actual measurement,
the first calibration process is that,
a. after a plurality of electromagnetic detection coils are distributed and fixed on the surface of a monitored part of a monitored object in a cascading manner, an electromagnetic detection instrument excites the electromagnetic detection coils electrically connected with a signal excitation end of the electromagnetic detection instrument, the rest of the plurality of electromagnetic detection coils electrically connected with a signal receiving end of the electromagnetic detection instrument generate induction current and alternating magnetic field one by one, and the generated induction current is sent to the electromagnetic detection instrument;
b. the electromagnetic detection instrument sends induction current signal parameters of a plurality of electromagnetic detection coils which are electrically connected with the signal receiving end to a monitoring data management system, wherein the induction current signal parameters are obtained by analysis and processing;
c. the monitoring data management system receives and stores induced current signal parameters of a plurality of electromagnetic detection coils electrically connected with a signal receiving end of the electromagnetic detection instrument, and the induced current signal parameters are used as calibration reference induced current signal parameters;
the actual measurement process is that,
d. the electromagnetic detection instrument periodically excites the electromagnetic detection coils electrically connected with the signal excitation end of the electromagnetic detection instrument and sends induced current signal parameters of the electromagnetic detection coils electrically connected with the signal receiving end of the electromagnetic detection instrument to the monitoring data management system;
f. the monitoring data management system stores induced current signal parameters of a plurality of electromagnetic detection coils electrically connected with a signal receiving end of the electromagnetic detection instrument, and a monitoring curve of each electromagnetic detection coil is manufactured according to the induced current signal parameters and monitoring time of each electromagnetic detection coil; when the induced current signal parameter of each electromagnetic detection coil is the same as the calibrated reference induced current signal parameter stored in the step c, the monitoring curve has no mutation, and the surface state of the monitored part of the monitored object can be judged to have no change; when the induced current signal parameters of one or more electromagnetic detection coils are different from the corresponding calibrated reference induced current signal parameters stored in the step c, the monitoring curve of one or more electromagnetic detection coils is suddenly changed, and the structural state of the monitored part of the monitored object where one or more electromagnetic detection coils are located can be judged to be changed.
An object deformation electromagnetic monitoring method is characterized in that a monitoring data management system is used for manufacturing a dynamic monitoring graph of the surface of the monitored part of the monitored object according to the position parameter of each electromagnetic detection coil electrically connected with a signal receiving end of an electromagnetic detection instrument on the surface of the monitored part of the monitored object, the induced current signal parameter of each electromagnetic detection coil electrically connected with the signal receiving end of the electromagnetic detection instrument and monitoring time, and monitoring personnel can conveniently and visually monitor the structural state change of the monitored part of the monitored object.
The invention has the advantages that the electromagnetic nondestructive detection method is adopted, the device comprises a plurality of electromagnetic detection coils, an electromagnetic detection instrument and a monitoring data management system, the plurality of electromagnetic detection coils are distributed and fixed on the surface of the monitoring part of the monitored object in a cascading way or embedded and fixed in the monitoring part, and are distributed and fixed in a linear array or a planar array or a space three-dimensional array form according to the structural characteristics and the monitoring requirements of the monitoring part of the monitored object, wherein at least one electromagnetic detection coil is used as an excitation coil and is electrically connected with a signal excitation end of the electromagnetic detection instrument, the rest plurality of electromagnetic detection coils are used as a receiving coil and an excitation coil and are electrically connected with a signal receiving end of the electromagnetic detection instrument, and the structural state change of the monitoring part of the monitored object is indirectly monitored by monitoring the change of induced current signal parameters of the plurality of electromagnetic detection coils electrically connected with the, the real-time and effective monitoring result of the structural state change can be obtained, and the method is particularly suitable for the asymmetrical deformation monitoring work of symmetrical objects.
The present invention will be described in further detail with reference to the following embodiments, but the present invention is not limited to the embodiments.
Drawings
The invention will be further elucidated with reference to an embodiment in the drawing.
Fig. 1 is a schematic diagram of a monitoring apparatus and method according to a first embodiment of the invention.
Fig. 2 is a schematic diagram of comparison between induced current signal parameters of a plurality of middle electromagnetic detection coils and calibrated reference induced current signal parameters in the monitoring method according to the first embodiment of the invention.
Fig. 3 is a schematic view of a monitoring curve of the first embodiment of the present invention.
Fig. 4 is a schematic view of the distribution of the area array of the electromagnetic detection coils of the monitoring apparatus according to the second embodiment of the present invention.
Fig. 5 is a schematic diagram of a three-dimensional array distribution of electromagnetic detection coils of a monitoring device according to a third embodiment of the invention.
In the figure, t. an electromagnetic detection coil electrically connected with a signal excitation end of an electromagnetic detection instrument, r. an electromagnetic detection coil electrically connected with a signal receiving end of the electromagnetic detection instrument, e. the electromagnetic detection instrument, d. a monitoring data management system, a. a monitored object, v. an induced current signal parameter, and t. monitoring time.
Detailed Description
In a first embodiment, as shown in fig. 1, 2, and 3, an object deformation electromagnetic monitoring apparatus includes a plurality of electromagnetic detection coils, an electromagnetic detection instrument E, and a monitoring data management system D, and is characterized in that:
the electromagnetic detection coils are distributed and fixed on the surface of the monitoring part of the monitored object A in a cascading manner or embedded and fixed in the monitoring part, and are distributed and fixed in a linear array manner according to the structural characteristics of the monitoring part of the monitored object;
the cascade type refers to that: at least one electromagnetic detection coil is used as an excitation coil and is electrically connected with a signal excitation end of an electromagnetic detection instrument E; the other electromagnetic detection coils are not only receiving coils but also exciting coils and are electrically connected with a signal receiving end of an electromagnetic detection instrument E; the electromagnetic detection coil R is used as a receiving coil to generate induction current and transmit the induction current to the electromagnetic detection instrument E, and the electromagnetic detection coil R is used for generating an alternating magnetic field by induction, the induction generated alternating magnetic field excites the next electromagnetic detection coil R which is electrically connected with the signal receiving end of the electromagnetic detection instrument E and is adjacent to the electromagnetic detection coil R to generate induction current and alternating magnetic field, so that the electromagnetic detection coils R electrically connected with the signal receiving end of the electromagnetic detection instrument E generate induction current and alternating magnetic field one by one, and are used as receiving coils and exciting coils;
the electromagnetic detection instrument E is electrically connected with the monitoring data management system D.
An object deformation electromagnetic monitoring method adopts the device, and is characterized in that: the monitoring method comprises two processes of first calibration and actual measurement,
the first calibration process is that,
a. after a plurality of electromagnetic detection coils are distributed and fixed on the surface of a monitored part of a monitored object A in a cascading manner, an electromagnetic detection instrument E excites the electromagnetic detection coils T electrically connected with a signal excitation end of the electromagnetic detection instrument E, the rest of the plurality of electromagnetic detection coils electrically connected with a signal receiving end of the electromagnetic detection instrument E generate induction current and alternating magnetic field one by one, and the generated induction current is sent to the electromagnetic detection instrument E;
b. the electromagnetic detection instrument E sends induction current signal parameters V of a plurality of electromagnetic detection coils R which are electrically connected with a signal receiving end to a monitoring data management system D;
c. the monitoring data management system D receives and stores induced current signal parameters V of a plurality of electromagnetic detection coils R electrically connected with a signal receiving end of an electromagnetic detection instrument E, and the induced current signal parameters V are used as calibration reference induced current signal parameters V;
the actual measurement process is that,
d. the electromagnetic detection instrument E periodically excites the electromagnetic detection coils T electrically connected with the signal excitation end of the electromagnetic detection instrument E and sends induced current signal parameters V of the electromagnetic detection coils R electrically connected with the signal receiving end of the electromagnetic detection instrument E to the monitoring data management system D;
f. the monitoring data management system D stores the induced current signal parameters V of the plurality of electromagnetic detection coils electrically connected with the signal receiving end of the electromagnetic detection instrument E, and makes a monitoring curve of each electromagnetic detection coil R according to the induced current signal parameters V and the monitoring time t of each electromagnetic detection coil R; when the induced current signal parameter V of each electromagnetic detection coil R is the same as the calibrated reference induced current signal parameter V stored in the step c, the monitoring curve has no mutation, and the surface state of the monitored part of the monitored object A can be judged to have no change; when the induced current signal parameter V of one or more electromagnetic detection coils R is different from the corresponding calibrated reference induced current signal parameter V stored in step c, the monitoring curve of one or more electromagnetic detection coils R changes suddenly, and it can be determined that the structural state of the monitored part of the monitored object a where one or more electromagnetic detection coils R are located changes.
An object deformation electromagnetic monitoring method is characterized in that a monitoring data management system D is used for manufacturing a dynamic monitoring graph of the surface of the monitored part of a monitored object A according to the position parameter of each electromagnetic detection coil R electrically connected with a signal receiving end of an electromagnetic detection instrument E on the surface of the monitored part of the monitored object A, the induced current signal parameter V of each electromagnetic detection coil R electrically connected with the signal receiving end of the electromagnetic detection instrument E and monitoring time t, and monitoring personnel can conveniently monitor structural state changes of the monitored part of the monitored object A visually.
Fig. 4 is a schematic diagram of the distribution of the area array of the electromagnetic detection coils of the monitoring device according to the second embodiment of the present invention, which is suitable for the surface state monitoring operation of an object with a large area.
Fig. 5 is a schematic diagram of the spatial three-dimensional array distribution of the electromagnetic detection coils of the monitoring device according to the third embodiment of the present invention, which is suitable for the overall structural state monitoring operation of a large-sized spatial three-dimensional structure object.
The above embodiments are only used to further illustrate the object deformation electromagnetic monitoring device and method of the present invention, but the present invention is not limited to the embodiments, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention fall within the protection scope of the technical solution of the present invention.
Claims (3)
1. The utility model provides an object deformation electromagnetism monitoring devices, includes a plurality of electromagnetic detection coils, electromagnetic detection instrument, monitoring data management system, its characterized in that:
the electromagnetic detection coils are distributed and fixed on the surface of the monitoring part of the monitored object in a cascading manner or embedded and fixed in the monitoring part, and are distributed and fixed in a linear array or area array or space three-dimensional array manner according to the structural characteristics and the monitoring requirements of the monitoring part of the monitored object;
the cascade type refers to that: at least one electromagnetic detection coil is used as an excitation coil and is electrically connected with a signal excitation end of an electromagnetic detection instrument; the other electromagnetic detection coils are not only receiving coils but also exciting coils and are electrically connected with a signal receiving end of the electromagnetic detection instrument; the electromagnetic detection coils electrically connected with the signal receiving end of the electromagnetic detection instrument are used as the receiving coils to generate induction current and transmit the induction current to the electromagnetic detection instrument when the electromagnetic detection coils electrically connected with the signal excitation end of the electromagnetic detection instrument excite an alternating magnetic field, and the induction generated alternating magnetic field excites the next electromagnetic detection coil adjacent to the electromagnetic detection instrument to generate induction current and alternating magnetic field;
the electromagnetic detection instrument is electrically connected with the monitoring data management system.
2. An electromagnetic monitoring method for deformation of an object, which adopts the device of claim 1, and is characterized in that: the monitoring method comprises two processes of first calibration and actual measurement,
the first calibration process is that,
a. after a plurality of electromagnetic detection coils are distributed and fixed on the surface of a monitored part of a monitored object in a cascading manner, an electromagnetic detection instrument excites the electromagnetic detection coils electrically connected with a signal excitation end of the electromagnetic detection instrument, the rest of the plurality of electromagnetic detection coils electrically connected with a signal receiving end of the electromagnetic detection instrument generate induction current and alternating magnetic field one by one, and the generated induction current is sent to the electromagnetic detection instrument;
b. the electromagnetic detection instrument sends induction current signal parameters of a plurality of electromagnetic detection coils which are electrically connected with the signal receiving end to a monitoring data management system, wherein the induction current signal parameters are obtained by analysis and processing;
c. the monitoring data management system receives and stores induced current signal parameters of a plurality of electromagnetic detection coils electrically connected with a signal receiving end of the electromagnetic detection instrument, and the induced current signal parameters are used as calibration reference induced current signal parameters;
the actual measurement process is that,
d. the electromagnetic detection instrument periodically excites the electromagnetic detection coils electrically connected with the signal excitation end of the electromagnetic detection instrument and sends induced current signal parameters of the electromagnetic detection coils electrically connected with the signal receiving end of the electromagnetic detection instrument to the monitoring data management system;
f. the monitoring data management system stores induced current signal parameters of a plurality of electromagnetic detection coils electrically connected with a signal receiving end of the electromagnetic detection instrument, and a monitoring curve of each electromagnetic detection coil is manufactured according to the induced current signal parameters and monitoring time of each electromagnetic detection coil; when the induced current signal parameter of each electromagnetic detection coil is the same as the calibrated reference induced current signal parameter stored in the step c, the monitoring curve has no mutation, and the surface state of the monitored part of the monitored object can be judged to have no change; when the induced current signal parameters of one or more electromagnetic detection coils are different from the corresponding calibrated reference induced current signal parameters stored in the step c, the monitoring curve of one or more electromagnetic detection coils is suddenly changed, and the structural state of the monitored part of the monitored object where one or more electromagnetic detection coils are located can be judged to be changed.
3. An electromagnetic monitoring method for deformation of an object according to claim 2, characterized in that: furthermore, the monitoring data management system makes a dynamic monitoring graph of the surface of the monitored part of the monitored object according to the position parameter of each electromagnetic detection coil electrically connected with the signal receiving end of the electromagnetic detection instrument on the surface of the monitored part of the monitored object, the induced current signal parameter of each electromagnetic detection coil electrically connected with the signal receiving end of the electromagnetic detection instrument and the monitoring time, so that monitoring personnel can monitor the structural state change of the monitored part of the monitored object visually.
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| CN112020166B (en) * | 2019-05-30 | 2022-03-18 | 宁波方太厨具有限公司 | Heating circuit feasibility verification method for electromagnetic heating wire coil |
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| DE3936817A1 (en) * | 1989-11-04 | 1991-05-08 | Waelischmiller Hans Dipl Ing F | Overload protection for hot cell manipulator arm - has induction coil with core attached to sprung end of manipulator cross beam support for overload deflection measurement |
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