CN110346739B - Magnetic permeability test apparatus and magnetic permeability test method - Google Patents
Magnetic permeability test apparatus and magnetic permeability test method Download PDFInfo
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- CN110346739B CN110346739B CN201910800387.1A CN201910800387A CN110346739B CN 110346739 B CN110346739 B CN 110346739B CN 201910800387 A CN201910800387 A CN 201910800387A CN 110346739 B CN110346739 B CN 110346739B
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- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
- G01R33/1223—Measuring permeability, i.e. permeameters
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Abstract
The invention provides a magnetic conductivity test device and a magnetic conductivity test method, which relate to the technical field of part quality detection, wherein the magnetic conductivity test device comprises a weak magnetic meter, an optical fiber sensor, a fixed frame, a movable frame and a movable mechanism; the weak magnetic meter and the optical fiber sensor are both arranged on one of the fixed frame and the movable frame, and the optical fiber sensor is configured to collect and send the movement information of the permanent magnet rod of the weak magnetic meter; the moving frame is connected to the fixed frame through a moving mechanism, and the moving mechanism is configured to drive the moving frame to reciprocate relative to the fixed frame so that the piece to be measured, which is arranged on the other one of the fixed frame and the moving frame, is close to or far away from the permanent magnet bar of the weak magnetic meter; the magnetic conductivity testing method is applied to the magnetic conductivity testing equipment, and the technical problems that in the prior art, the magnetic conductivity of parts is detected completely manually, human eye fatigue is easy to judge and mistakes are made in the detection process, and the detection efficiency is low are solved.
Description
Technical Field
The invention relates to the technical field of part quality detection, in particular to a magnetic permeability testing device and a magnetic permeability testing method.
Background
In the prior art, some parts containing ferrite can generate weak magnetic permeability, and when the parts are applied to electronic equipment, the parts can generate some negative effects on the electronic equipment, for example, when an FPC (Flexible Printed Circuit, abbreviated as FPC) Flexible board, i.e. a Flexible Circuit board, is produced, a steel sheet on the Flexible Circuit board can generate weak magnetic permeability, and when the magnetic permeability reaches a certain value, the parts can generate an effect on the function of the Flexible Circuit board.
At present, in the production process, in order to ensure that the magnetic permeability of the parts does not have negative influence on the function of finished equipment, or ensure that the magnetic permeability of the parts is in a range with small negative influence on the function production of the finished equipment; the method mainly adopts the weak magnetic meter to detect the magnetic permeability of the parts in advance.
The weak magnetic meter is a nondestructive testing instrument suitable for both workshop and field use, and its structure mainly includes shell body and permanent magnetic bar mounted on the shell body, in the course of use, a test standard sample with known magnetic conductivity can be mounted on the shell body, the permanent magnetic bar can be attracted by test standard sample, moved towards the test standard sample direction and adsorbed on the test standard sample, and the size of attraction force depends on the magnetic size of inserted test standard sample. The permanent magnet rod extends out of the shell, when a piece to be tested approaches the permanent magnet rod, the piece to be tested can attract the permanent magnet rod, and if the magnetic conductivity of the piece to be tested is larger than that of the test standard sample, the permanent magnet rod moves towards the piece to be tested and is adsorbed on the piece to be tested; if the magnetic conductivity of the piece to be tested is smaller than that of the test standard sample, the permanent magnetic rod is still adsorbed to the test standard sample; therefore, the magnetic permeability range of the to-be-tested piece can be calculated by continuously replacing the test standard samples with different known magnetic permeability, and the situation that the magnetic permeability of the to-be-tested piece is equal to that of the test standard sample is basically avoided in the actual use process.
However, at present, the weak-magnetic meter is used for detecting the magnetic permeability of the parts completely and manually, so that the human eye fatigue is easy to determine by mistake in the manual detection process, and the detection efficiency is low.
Disclosure of Invention
The invention aims to provide magnetic conductivity testing equipment and a magnetic conductivity testing method, which are used for solving the technical problems that in the prior art, the magnetic conductivity of parts is detected completely by manpower, the human eye fatigue is easy to judge by mistake in the detection process, and the detection efficiency is low.
In a first aspect, an embodiment of the present invention provides a magnetic permeability testing apparatus, including a weak magnetic meter, an optical fiber sensor, a fixed frame, a moving frame, and a moving mechanism;
the weak magnetic meter and the optical fiber sensor are both arranged on one of the fixed frame and the movable frame, and the optical fiber sensor is configured to collect and send the movement information of the permanent magnet rod of the weak magnetic meter;
the movable frame is connected to the fixed frame through the movable mechanism, and the movable mechanism is configured to drive the movable frame to reciprocate relative to the fixed frame so that the piece to be tested mounted on the other one of the fixed frame and the movable frame is close to or far away from the permanent magnet bar of the weak magnetic meter.
In an alternative embodiment, the fixture includes a frame body and an upper die assembly;
the upper die assembly comprises an upper die plate, and the upper die plate is fixed at the top of the frame body; the optical fiber sensor and the weak magnetic meter are both arranged on the upper template, and a permanent magnet rod of the weak magnetic meter extends downwards; the movable frame is positioned below the upper template and used for mounting the piece to be tested; the moving mechanism is configured to drive the moving frame to move up and down relative to the upper template so as to be close to or far away from the upper template.
In an alternative embodiment, the upper die assembly further comprises a fiber sensor mount comprising a first adjustment block and a second adjustment block;
the optical fiber sensor is fixed on the second adjusting block; the second adjusting block is connected to the first adjusting block in a mode that the vertical distance of the second adjusting block relative to the first adjusting block can be adjusted; the upper template is provided with a long hole, and the first adjusting block is connected in the long hole in a manner of sliding along the length direction of the long hole.
In an optional embodiment, the upper die assembly further comprises a weak magnetic meter mounting seat, and the weak magnetic meter mounting seat comprises a supporting column and a top pressure plate;
the supporting column is provided with a plurality of supporting columns, one end of each supporting column is connected with the top surface of the upper template, the other end of each supporting column is connected with the jacking plate, the weak magnetic meter is clamped between the upper template and the jacking plate, an opening is formed in the upper template, and a permanent magnet rod of the weak magnetic meter penetrates through the opening and extends downwards.
In an alternative embodiment, the flux-weakening meter mounting base further comprises a flux-weakening meter protection base; the weak magnetic meter protection seat is provided with a limit notch, and the weak magnetic meter protection seat is arranged in the opening in a mode that the limit notch semi-surrounds a permanent magnetic rod of the weak magnetic meter.
In an alternative embodiment, the moving frame comprises a lower template, a positioning block and a rotating piece;
the lower template is fixed on the moving mechanism; the positioning block is fixed on the upper surface of the lower template, and a positioning groove for fixing the piece to be measured is formed in the positioning block; the rotating piece is rotatably connected to the positioning block or the lower template and is configured to be capable of rotating relative to the positioning block to cover or be away from the positioning groove.
In an optional embodiment, a guide post is arranged on the lower template, a guide hole is formed in the upper template, and the guide post is inserted into the guide hole.
In an optional embodiment, the moving mechanism comprises a motor and a telescopic rod connected with the motor, and the motor is mounted on the fixed frame through a mounting plate; the movable frame is arranged on the telescopic rod, and the motor is configured to drive the telescopic rod to stretch and retract so as to drive the movable frame to reciprocate relative to the fixed frame.
In an optional embodiment, the magnetic permeability testing equipment further comprises a code scanning gun, wherein the code scanning gun is installed on one of the fixed frame and the movable frame, on which the weak magnetic meter is installed, and is configured to collect and send the number information of the piece to be tested.
In a second aspect, an embodiment of the present invention provides a magnetic permeability testing method, which is applied to the magnetic permeability testing apparatus described in any one of the foregoing embodiments.
Specifically, the magnetic permeability test method comprises a first step, a second step and a third step;
the first step comprises: installing a test standard sample at a set position of the weak magnetic meter; mounting a piece to be tested on one of the fixed frame and the movable frame, on which the weak magnetic meter is not mounted; driving the moving mechanism to enable the moving frame to move relative to the fixed frame so as to enable the piece to be detected to be close to the permanent magnet bar of the weak magnetic meter; the optical fiber sensor collects the movement information of the permanent magnet bar of the weak magnetic meter and transmits the collected information to an external control center;
the second step includes: comparing the magnetic permeability of the to-be-tested piece with the magnetic permeability of the test standard sample by the external control center according to the received signal;
if the permanent magnet bar is adsorbed on the test standard sample, the magnetic conductivity of the to-be-tested piece is smaller than that of the test standard sample;
if the permanent magnet bar moves towards the direction of the piece to be tested and is adsorbed on the piece to be tested, the magnetic conductivity of the piece to be tested is larger than that of the test standard sample;
the third step includes: obtaining the magnetic conductivity range of the piece to be measured after debugging according to the result of the comparison condition in the second step;
if the magnetic permeability of the piece to be tested is larger than that of the test standard sample, driving the moving mechanism to enable the moving frame to move relative to the fixed frame so as to enable the piece to be tested to be far away from the permanent magnet rod of the weak magnetic meter, then replacing the test standard sample with the magnetic permeability larger than that of the current test standard sample, and repeating the first step and the second step until the magnetic permeability of the piece to be tested is smaller than that of the test standard sample, so that the magnetic permeability range of the piece to be tested is obtained;
and if the magnetic permeability of the piece to be tested is smaller than that of the test standard sample, driving the moving mechanism to move the moving frame relative to the fixed frame so as to enable the piece to be tested to be far away from the permanent magnet rod of the weak magnetic meter, replacing the test standard sample with the magnetic permeability smaller than that of the current test standard sample, and repeating the first step and the second step until the magnetic permeability of the piece to be tested is larger than that of the test standard sample, so that the magnetic permeability range of the piece to be tested is obtained.
The embodiment of the invention can produce the following beneficial effects:
a first aspect of an embodiment of the present invention provides a magnetic permeability testing apparatus, which includes a weak magnetic meter, an optical fiber sensor, a fixed frame, a movable frame, and a moving mechanism; the weak magnetic meter and the optical fiber sensor are both arranged on one of the fixed frame and the movable frame, and the optical fiber sensor is configured to collect and send the movement information of the permanent magnet rod of the weak magnetic meter; the moving frame is connected to the fixed frame through a moving mechanism, and the moving mechanism is configured to drive the moving frame to reciprocate relative to the fixed frame so that the piece to be measured, which is arranged on the other one of the fixed frame and the moving frame, is close to or far away from the permanent magnet bar of the weak magnetic meter.
The embodiment of the invention can detect the magnetic conductivity of the piece to be detected containing low ferrite, such as a steel sheet on a flexible circuit board, so as to judge whether the piece to be detected meets the design requirement of the magnetic conductivity, thereby improving the product percent of pass. Meanwhile, in the embodiment of the invention, the weak magnetic meter in the prior art is arranged on one of the fixed frame and the movable frame, the piece to be detected is arranged on the other of the fixed frame and the movable frame, and the moving mechanism and the optical fiber sensor are matched to detect the magnetic conductivity of the parts in the production process and output data, and the central control system is matched to debug, so that the accuracy of the detection result is ensured, the invention has the advantages of convenience in operation, suitability for batch detection and the like, and the detection efficiency is greatly improved.
The second aspect of the embodiment of the present invention also provides a magnetic permeability testing method, which is applied to the magnetic permeability testing device.
Specifically, the magnetic permeability test method comprises a first step, a second step and a third step;
the first step comprises: installing a test standard sample at a set position of the weak magnetic meter; mounting the piece to be tested on one of the fixed frame and the movable frame without mounting the weak magnetic meter; the driving moving mechanism enables the moving frame to move relative to the fixed frame so that the piece to be detected is close to the permanent magnet bar of the weak magnetic meter; the optical fiber sensor collects the movement information of the permanent magnet bar of the weak magnetic meter and transmits the collected information to an external control center;
the second step comprises: the external control center compares the magnetic permeability of the to-be-tested piece with the magnetic permeability of the test standard sample according to the received signal;
if the permanent magnet bar is adsorbed on the test standard sample, the magnetic conductivity of the to-be-tested piece is smaller than that of the test standard sample;
if the permanent magnet bar moves towards the direction of the piece to be tested and is adsorbed on the piece to be tested, the magnetic conductivity of the piece to be tested is larger than that of the test standard sample;
the third step comprises: obtaining the magnetic conductivity range of the piece to be measured after debugging according to the result of the comparison condition in the second step;
if the magnetic permeability of the piece to be tested is larger than that of the test standard sample, driving the moving mechanism to enable the moving frame to move relative to the fixed frame so as to enable the piece to be tested to be far away from the permanent magnet bar of the weak magnetic meter, then replacing the test standard sample with the magnetic permeability larger than that of the current test standard sample, and repeating the first step and the second step until the magnetic permeability of the piece to be tested is smaller than that of the test standard sample, so that the magnetic permeability range of the piece to be tested is obtained;
and if the magnetic permeability of the piece to be tested is smaller than that of the test standard sample, driving the moving mechanism to move the moving frame relative to the fixed frame so as to enable the piece to be tested to be far away from the permanent magnet bar of the weak magnetic meter, replacing the test standard sample with the magnetic permeability smaller than that of the current test standard sample, and repeating the first step and the second step until the magnetic permeability of the piece to be tested is larger than that of the test standard sample, so that the magnetic permeability range of the piece to be tested is obtained.
The embodiment of the invention provides a specific use method for magnetic permeability test by using the magnetic permeability test equipment, which can achieve the same beneficial effects as the magnetic permeability test equipment.
In the magnetic permeability test equipment and the magnetic permeability test method provided by the embodiment of the invention, the piece to be tested mainly refers to a part containing ferrite.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is an axial view of the overall structure of a magnetic permeability testing device provided by an embodiment of the present invention;
FIG. 2 is a front view of the overall structure of a magnetic permeability testing apparatus provided by an embodiment of the present invention;
FIG. 3 is an isometric view of the overall structure of an upper mold assembly in a permeability testing apparatus according to an embodiment of the present invention;
FIG. 4 is a front view of the overall structure of an upper mold assembly in a permeability testing apparatus provided by an embodiment of the present invention;
FIG. 5 is a top view of the overall structure of an upper mold assembly in a permeability testing apparatus according to an embodiment of the present invention;
fig. 6 is a schematic overall structure diagram of a moving rack of the magnetic permeability testing apparatus according to the embodiment of the present invention, the moving rack being mounted on a moving mechanism at a first viewing angle;
fig. 7 is an enlarged view of a portion of the structure of fig. 6.
Icon: 1-a weak magnetometer; 11-permanent magnetic rod; 2-a fiber optic sensor; 3-a fixing frame; 31-a frame body; 32-an upper die assembly; 321-upper template; 3211-slotted hole; 3212-a pilot hole; 301-fiber sensor mount; 3011-a first conditioning block; 3012-a second conditioning block; 302-weak magnetic meter mounting base; 3021-support column; 3022-a top press plate; 3023-weak magnetic meter protecting base; 4-a moving rack; 41-a lower template; 42-positioning blocks; 421-a positioning groove; 43-a rotating member; 5-a moving mechanism; 51-a motor; 52-a telescopic rod; 53-mounting plate; 6-a guide post; 7-scanning a yard gun; 71-code scanning gun support.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "upper", "lower", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally laid out when products of the present invention are used, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Example one
The present embodiment provides a magnetic permeability testing apparatus, which includes a weak magnetic meter 1, an optical fiber sensor 2, a fixed frame 3, a moving frame 4, and a moving mechanism 5, referring to fig. 1 to 7. The weak magnetic meter 1 and the optical fiber sensor 2 are both arranged on one of the fixed frame 3 and the movable frame 4, and the optical fiber sensor 2 is configured to collect and transmit the movement information of the permanent magnet rod 11 of the weak magnetic meter 1; the movable frame 4 is connected to the fixed frame 3 by a moving mechanism 5, and the moving mechanism 5 is arranged to drive the movable frame 4 to reciprocate relative to the fixed frame 3 so that the object to be measured mounted on the other of the fixed frame 3 and the movable frame 4 approaches or separates from the permanent magnet bar 11 of the weak magnetic meter 1.
The embodiment can detect the magnetic conductivity of the piece to be detected containing low ferrite, such as a steel sheet on the flexible circuit board, so as to judge whether the piece to be detected meets the design requirement of the magnetic conductivity, and further improve the product percent of pass. Meanwhile, in the embodiment of the invention, the weak magnetic meter 1 in the prior art is arranged on one of the fixed frame 3 and the movable frame 4, the piece to be detected is arranged on the other of the fixed frame 3 and the movable frame 4, and the moving mechanism 5 and the optical fiber sensor 2 are matched to detect the magnetic conductivity of the parts and output data in the production process, and the detection result is debugged by matching with the central control system, so that the detection method has the advantages of convenience in operation, suitability for batch detection and the like, and is beneficial to greatly improving the detection efficiency.
Further, in the present embodiment, the moving mechanism 5 is disposed in various ways so as to be able to drive the moving frame 4 to reciprocate relative to the fixed frame 3, for example, the moving mechanism 5 is disposed so as to be able to drive the moving frame 4 to move left and right relative to the fixed frame 3 so as to move the object to be measured closer to or farther from the permanent magnet bar 11 of the weak magnetic meter 1. Referring to fig. 1 to 5, preferably, in an alternative embodiment of the present embodiment, the fixing frame 3 includes a frame body 31 and an upper mold assembly 32; the upper mold assembly 32 comprises an upper mold plate 321, and the upper mold plate 321 is fixed on the top of the frame body 31; the optical fiber sensor 2 and the weak magnetic meter 1 are both arranged on the upper template 321, and a permanent magnet rod of the weak magnetic meter 1 extends downwards; the movable frame 4 is positioned below the upper template 321 and used for mounting a piece to be tested; the moving mechanism 5 is configured to drive the moving frame 4 to move up and down relative to the upper platen 321 to approach or separate from the upper platen 321.
In the above preferred alternative embodiment, the fixed frame 3 and the movable frame 4 are arranged up and down in the space, so that the movable frame has the advantage of easy operation. Wherein, further, the frame body 31 may be a box frame as shown in fig. 1 and fig. 2, and the bottom of the frame body 31 may be provided with an operation table, a circuit board is arranged inside the operation table, the optical fiber sensor 2 is in circuit or signal connection with the circuit board, and a display screen may be correspondingly arranged on the operation table for visualizing the information sensed by the optical fiber sensor 2, the above circuit and signal connection forms are already well-established numerical control technologies in the existing numerical control technologies, and therefore, the specific structure and the working principle thereof are not repeated in this embodiment.
With continued reference to fig. 3 to 5, based on the above preferred alternative embodiment, further optionally, the upper die assembly 32 further includes an optical fiber sensor mounting seat 301, and the optical fiber sensor mounting seat 301 includes a first adjusting block 3011 and a second adjusting block 3012; the optical fiber sensor 2 is fixed on the second adjusting block 3012; the second adjusting block 3012 is connected to the first adjusting block 3011 so as to be able to adjust the vertical distance with respect to the first adjusting block 3011; a long hole 3211 is formed in the upper die plate 321, and the first adjusting block 3011 is connected to the inside of the long hole 3211 so as to be slidable in the longitudinal direction of the long hole 3211.
The second adjusting block 3012 can be connected to the first adjusting block 3011 in a manner of adjusting the vertical distance with respect to the first adjusting block 3011, for example, a plurality of assembling holes can be respectively formed in the first adjusting block 3011 and the second adjusting block 3012, and the first adjusting block 3011 is fixed to the second adjusting block 3012 by selectively positioning the assembling holes on the first adjusting block 3011 and the assembling holes on the second adjusting block 3012 and then positioning the first adjusting block 3012 by using bolts or other positioning members; or, a screw is connected to the second adjusting block 3012, a long circular hole extending in the up-down direction is formed in the first adjusting block 3011, the screw is fixed by a nut after passing through the long circular hole, and the mounting position of the second adjusting block 3012 with respect to the first adjusting block 3011 is adjusted by loosening or tightening the nut, or the like; further, a groove-type guide rail extending in the up-down direction may be provided on the first adjustment block 3011, and the second adjustment block 3012 may be provided in a concave portion of the guide rail and may slide along the guide rail, thereby facilitating adjustment of the installation position of the second adjustment block 3012 with respect to the first adjustment block 3011.
In addition, there are various mounting structures in which the first adjusting block 3011 can slide along the length direction of the long hole 3211, for example, but not limited to, there are limit protrusions provided at the bottom of the first adjusting block 3011, the limit protrusions are located inside the long hole 3211, a plurality of through holes are provided at positions of the upper die plate 321 near the long hole 3211 and distributed at equal intervals along the extending direction of the long hole 3211, through holes are also provided in the first adjusting block 3011, and when the limit protrusions of the first adjusting block 3011 slide to a set position along the long hole 3211, bolts or other positioning members sequentially pass through the through holes in the first adjusting block 3011 and the through holes in the upper die plate 321 to position the first adjusting block 3011, and the like.
In the above alternative embodiment, the first adjusting block 3011 and the second adjusting block 3012 are provided, so that the installation position of the optical fiber sensor 2 can be adjusted to be located at a good signal collecting position.
In addition, with continued reference to fig. 3-5, in an alternative embodiment of the present embodiment, upper die assembly 32 further includes a flux weakening gauge mounting base 302, where flux weakening gauge mounting base 302 includes a support post 3021 and a top pressure plate 3022; the supporting columns 3021 are provided with a plurality of supporting columns 3021, one ends of the supporting columns 3021 are connected to the top surface of the upper template 321, the other ends of the supporting columns 3021 are connected to the top pressure plate 3022, the weak magnetic sensor 1 is clamped between the upper template 321 and the top pressure plate 3022, an opening is formed in the upper template 321, and the permanent magnetic rod 11 of the weak magnetic sensor 1 passes through the opening and extends downward. Therefore, the top pressure plate 3022 of the weak magnetic meter mounting base 302 can press the weak magnetic meter 1 tightly, so that the weak magnetic meter 1 is prevented from jumping to influence a test result in the control process.
In the above-mentioned alternative embodiment, further optionally, referring to fig. 4 in combination with fig. 3 and 5, the flux weakening meter mounting base 302 further comprises a flux weakening meter protection base 3023; a limit notch is arranged on the weak magnetic meter protection seat 3023, and the weak magnetic meter protection seat 3023 is installed in the opening in a manner that the limit notch semi-surrounds the permanent magnet bar 11 of the weak magnetic meter 1. From this, accessible weak magnetism meter protection seat 3023 carries out spacing protection to the permanent-magnet bar 11 of weak magnetism meter 1, avoids permanent-magnet bar 11 to rock by a wide margin in the operation process, influences its removal route that reciprocates, and then strengthens measuring result's accuracy.
In addition, referring to fig. 6 and 7, in an alternative embodiment of the present embodiment, the moving frame 4 includes a lower template 41, a positioning block 42, and a rotating member 43; the lower template 41 is fixed on the moving mechanism 5; the positioning block 42 is fixed on the upper surface of the lower template 41, and a positioning groove 421 for fixing the piece to be measured is formed in the positioning block 42; the rotating member 43 is rotatably connected to the positioning block 42 or the lower mold plate 41 and configured to be rotatable relative to the positioning block 42 to cover or separate from the positioning groove 421. During the use, through placing the piece that awaits measuring in constant head tank 421, the mode of rotating swivel 43 is fixed the piece that awaits measuring again, has convenient operation, the stable beneficial effect of fixed effect, wherein, the preferred rotation of swivel 43 is connected in locating piece 42, and its mode of rotating the connection can be through articulated etc. such as bolt or rivet.
With continued reference to fig. 6 and 7, in combination with fig. 3 and 5, on the basis of the above-mentioned optional embodiment, further optionally, a guide post 6 is provided on the lower die plate 41, a guide hole 3212 is provided on the upper die plate 321, and the guide post 6 is inserted into the guide hole 3212. Therefore, the lower template 41 can be guided and limited relative to the movement path of the upper template 321 through the guide holes 3212 and the guide columns 6, the alignment accuracy of the piece to be detected when the piece to be detected is close to the permanent magnet bar 11 is ensured, and the detection accuracy is further improved.
In addition, referring to fig. 6 and 7, in an alternative embodiment of the present embodiment, the moving mechanism 5 includes a motor 51 and a telescopic rod 52 connected to the motor 51, the motor 51 is mounted to the fixed frame 3 through a mounting plate 53; the movable frame 4 is mounted on the telescopic rod 52, and the motor 51 is configured to drive the telescopic rod 52 to extend and retract so as to drive the movable frame 4 to reciprocate relative to the fixed frame 3. The specific arrangement structure and the working principle of the motor 51 for driving the telescopic rod 52 to stretch are the same as those of an electric push rod. Of course, the moving mechanism 5 may not have the above-described structure, and for example, the motor 51 may be replaced with an air cylinder or the like as long as the above-described driving function can be realized.
In addition, referring to fig. 3, 4 and 5, in an alternative embodiment of this embodiment, the magnetic permeability testing apparatus further includes a code scanning gun 7, where the code scanning gun 7 is mounted on one of the fixed frame 3 and the movable frame 4, on which the weak magnetic sensor 1 is mounted, through a code scanning gun support 71, and is configured to collect and transmit number information of the to-be-tested object. Therefore, the number information of the piece to be detected can be collected and recorded through the code scanning gun 7 so as to be used for data recording, and the code scanning gun 7 can be electrically connected with an external control center through signal connection.
Example two
The embodiment provides a magnetic permeability testing method, which is applied to magnetic permeability testing equipment.
Specifically, referring to fig. 1 to 7, the magnetic permeability test apparatus includes a weak magnetic meter 1, an optical fiber sensor 2, a fixed frame 3, a moving frame 4, and a moving mechanism 5. The weak magnetic meter 1 and the optical fiber sensor 2 are both arranged on one of the fixed frame 3 and the movable frame 4, and the optical fiber sensor 2 is configured to collect and transmit the movement information of the permanent magnet rod 11 of the weak magnetic meter 1; the movable frame 4 is connected to the fixed frame 3 by a moving mechanism 5, and the moving mechanism 5 is arranged to drive the movable frame 4 to reciprocate relative to the fixed frame 3 so that the object to be measured mounted on the other of the fixed frame 3 and the movable frame 4 approaches or separates from the permanent magnet bar 11 of the weak magnetic meter 1.
The magnetic permeability testing method comprises a first step, a second step and a third step.
The first step comprises: installing a test standard sample at a set position of the weak magnetic meter 1; mounting a piece to be tested on one of the fixed frame 3 and the movable frame 4 without the weak magnetic meter 1; driving the moving mechanism 5 to move the moving frame 4 relative to the fixed frame 3 so as to enable the piece to be detected to be close to the permanent magnet bar 11 of the weak magnetic meter 1; and the optical fiber sensor 2 collects the movement information of the permanent magnet bar 11 of the weak magnetic meter 1 and transmits the collected information to an external control center.
The second step comprises: and the external control center compares the magnetic permeability of the to-be-tested piece with the magnetic permeability of the test standard sample according to the received signal: if the permanent magnet bar 11 is adsorbed on the test standard sample, the magnetic conductivity of the to-be-tested piece is smaller than that of the test standard sample; if the permanent magnet bar 11 moves towards the direction of the piece to be tested and is adsorbed on the piece to be tested, the magnetic permeability of the piece to be tested is larger than that of the test standard sample.
The third step comprises: and (5) obtaining the magnetic permeability range of the piece to be measured after debugging according to the result of the comparison condition in the second step: if the magnetic permeability of the to-be-tested piece is larger than that of the test standard sample, the moving mechanism 5 is driven to enable the moving frame 4 to move relative to the fixed frame 3 so as to enable the to-be-tested piece to be far away from the permanent magnet bar 11 of the weak magnetic meter 1, then the test standard sample with the magnetic permeability larger than that of the current test standard sample is replaced, the first step and the second step are repeated until the magnetic permeability of the to-be-tested piece is smaller than that of the test standard sample, and therefore the magnetic permeability range of the to-be-tested piece is obtained; if the magnetic permeability of the piece to be tested is smaller than that of the test standard sample, the moving mechanism 5 is driven to enable the moving frame 4 to move relative to the fixed frame 3 so as to enable the piece to be tested to be far away from the permanent magnet bar 11 of the weak magnetic meter 1, then the test standard sample with the magnetic permeability smaller than that of the current test standard sample is replaced, the first step and the second step are repeated until the magnetic permeability of the piece to be tested is larger than that of the test standard sample, and therefore the magnetic permeability range of the piece to be tested is obtained.
In the magnetic permeability test equipment and the magnetic permeability test method provided by the embodiment of the invention, the piece to be tested mainly refers to a part containing ferrite.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A magnetic conductivity testing device is characterized by comprising a weak magnetic meter (1), an optical fiber sensor (2), a fixed frame (3), a movable frame (4) and a movable mechanism (5);
the weak magnetic meter (1) and the optical fiber sensor (2) are both arranged on one of the fixed frame (3) and the movable frame (4), and the optical fiber sensor (2) is configured to collect and send the movement information of a permanent magnet rod (11) of the weak magnetic meter (1); the moving frame (4) is connected to the fixed frame (3) through the moving mechanism (5), and the moving mechanism (5) is configured to drive the moving frame (4) to reciprocate relative to the fixed frame (3) so as to enable the piece to be tested, which is installed on the other one of the fixed frame (3) and the moving frame (4), to approach or separate from the permanent magnet bar (11) of the weak magnetic meter (1);
the fixed frame (3) comprises a frame body (31) and an upper die assembly (32); the upper die assembly (32) comprises an upper die plate (321), and the upper die plate (321) is fixed at the top of the frame body (31); the optical fiber sensor (2) and the weak magnetic meter (1) are both arranged on the upper template (321), and a permanent magnet rod of the weak magnetic meter (1) extends downwards; the movable frame (4) is positioned below the upper template (321) and used for mounting the piece to be tested; the moving mechanism (5) is configured to drive the moving frame (4) to move up and down relative to the upper template (321) to approach or separate from the upper template (321);
the upper die assembly (32) further comprises an optical fiber sensor mounting seat (301), and the optical fiber sensor mounting seat (301) comprises a first adjusting block (3011) and a second adjusting block (3012); the optical fiber sensor (2) is fixed on the second adjusting block (3012); the second adjusting block (3012) is connected to the first adjusting block (3011) in a manner that the vertical distance of the second adjusting block can be adjusted relative to the first adjusting block (3011); the upper template (321) is provided with a long hole (3211), and the first adjusting block (3011) is connected to the long hole (3211) in a manner of being capable of sliding along the length direction of the long hole (3211).
2. Magnetic permeability test apparatus according to claim 1, characterized in that the upper die assembly (32) further comprises a flux weakening meter mounting base (302), the flux weakening meter mounting base (302) comprising a support pillar (3021) and a top press plate member (3022);
the utility model discloses a light flux meter, including support column (3021), top pressure plate spare (3022), weak magnet meter (1) are fixed in the top surface of upper die plate (321), support column (3021) have a plurality ofly, and a plurality ofly the one end of support column (3021) all with the top surface of upper die plate (321) is connected, a plurality ofly the other end of support column (3021) all with top pressure plate spare (3022) are connected, weak magnet meter (1) card is in upper die plate (321) with between the top pressure plate spare (3022) seted up the opening on upper die plate (321), permanent bar (11) of weak magnet meter (1) pass the opening extends down.
3. Magnetic permeability test apparatus as claimed in claim 2, characterized in that the flux weakening meter mounting block (302) further comprises a flux weakening meter protection block (3023); the weak magnetic meter protection seat (3023) is provided with a limit notch, and the weak magnetic meter protection seat (3023) is installed in the opening in a mode that the limit notch semi-surrounds a permanent magnetic rod (11) of the weak magnetic meter (1).
4. Magnetic permeability test apparatus according to claim 1, characterized in that the moving stand (4) comprises a lower template (41), a positioning block (42) and a rotating member (43);
the lower template (41) is fixed on the moving mechanism (5); the positioning block (42) is fixed on the upper surface of the lower template (41), and a positioning groove (421) for fixing a piece to be measured is formed in the positioning block (42); the rotating member (43) is rotatably connected to the positioning block (42) or the lower template (41) and configured to be capable of rotating relative to the positioning block (42) to cover or separate from the positioning groove (421).
5. The magnetic permeability test equipment according to claim 4, wherein the lower template (41) is provided with a guide post (6), the upper template (321) is provided with a guide hole (3212), and the guide post (6) is inserted into the guide hole (3212).
6. Magnetic permeability test equipment according to any of claims 1 to 5 characterized in that the moving mechanism (5) comprises a motor (51) and a telescopic rod (52) connected to the motor (51), the motor (51) being mounted to the stationary frame (3) by means of a mounting plate (53); the movable frame (4) is mounted on the telescopic rod (52), and the motor (51) is configured to drive the telescopic rod (52) to stretch and retract so as to drive the movable frame (4) to move in a reciprocating manner relative to the fixed frame (3).
7. Magnetic permeability test equipment according to any of claims 1 to 5, characterized in that it further comprises a code scanning gun (7), said code scanning gun (7) being mounted on one of the fixed frame (3) and the mobile frame (4) on which the flux weakening meter (1) is mounted, configured to collect and send the number information of the piece under test.
8. A magnetic permeability test method characterized by being applied to the magnetic permeability test apparatus of any one of claims 1 to 7, comprising a first step, a second step, and a third step;
the first step comprises: installing a test standard sample at a set position of the weak magnetic meter (1); mounting a to-be-tested piece on one of the fixed frame (3) and the movable frame (4) without the weak magnetic meter (1); driving the moving mechanism (5) to enable the moving frame (4) to move relative to the fixed frame (3) so as to enable the piece to be detected to be close to the permanent magnet bar (11) of the weak magnetic meter (1); the optical fiber sensor (2) collects the movement information of the permanent magnet bar (11) of the weak magnetic meter (1) and transmits the collected information to an external control center;
the second step includes: comparing the magnetic permeability of the to-be-tested piece with the magnetic permeability of the test standard sample by the external control center according to the received signal;
if the permanent magnet bar (11) is adsorbed on the test standard sample, the magnetic permeability of the piece to be tested is smaller than that of the test standard sample;
if the permanent magnet bar (11) moves towards the direction of the piece to be tested and is adsorbed on the piece to be tested, the magnetic permeability of the piece to be tested is larger than that of the test standard sample;
the third step includes: obtaining the magnetic conductivity range of the piece to be measured after debugging according to the result of the comparison condition in the second step;
if the magnetic permeability of the piece to be tested is larger than that of the test standard sample, driving the moving mechanism (5) to enable the moving frame (4) to move relative to the fixed frame (3) so as to enable the piece to be tested to be far away from a permanent magnet bar (11) of the weak magnetic meter (1), then replacing the test standard sample with the magnetic permeability larger than that of the current test standard sample, and repeating the first step and the second step until the magnetic permeability of the piece to be tested is smaller than that of the test standard sample, so that the magnetic permeability range of the piece to be tested is obtained;
if the magnetic permeability of the piece to be tested is smaller than that of the test standard sample, the moving mechanism (5) is driven to enable the moving frame (4) to move relative to the fixed frame (3) so that the piece to be tested is far away from the permanent magnet bar (11) of the weak magnetic meter (1), then the test standard sample with the magnetic permeability smaller than that of the current test standard sample is replaced, the first step and the second step are repeated until the magnetic permeability of the piece to be tested is larger than that of the test standard sample, and therefore the magnetic permeability range of the piece to be tested is obtained.
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| CN205120942U (en) * | 2015-10-22 | 2016-03-30 | 钢铁研究总院 | Quick weak magnetism measuring device |
| CN106019184B (en) * | 2016-05-23 | 2018-08-28 | 上海美诺福科技股份有限公司 | Silicon steel sheet magnetic detection automatic slice inserting machine |
| CN108020795A (en) * | 2017-12-12 | 2018-05-11 | 江西中磁科技协同创新有限公司 | A kind of magnetic property of soft magnetic material test device |
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| CN109407018A (en) * | 2018-09-11 | 2019-03-01 | 北京工业大学 | High-resolution Barkhausen noise and incremental permeability scanning imaging system |
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