CN114062211A - Magnetic suspension volume concentration detection method, detection system and magnetic powder flaw detection system - Google Patents
Magnetic suspension volume concentration detection method, detection system and magnetic powder flaw detection system Download PDFInfo
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- 239000000725 suspension Substances 0.000 title claims abstract description 333
- 239000006247 magnetic powder Substances 0.000 title claims abstract description 129
- 238000001514 detection method Methods 0.000 title claims abstract description 98
- 239000007788 liquid Substances 0.000 claims abstract description 67
- 238000000034 method Methods 0.000 claims abstract description 24
- 238000007689 inspection Methods 0.000 claims abstract description 16
- 239000006249 magnetic particle Substances 0.000 claims description 14
- 238000004891 communication Methods 0.000 claims description 7
- 230000007547 defect Effects 0.000 description 14
- 238000010586 diagram Methods 0.000 description 13
- 230000002776 aggregation Effects 0.000 description 4
- 238000004220 aggregation Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 238000004062 sedimentation Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000012956 testing procedure Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F22/00—Methods or apparatus for measuring volume of fluids or fluent solid material, not otherwise provided for
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/83—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
- G01N27/84—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields by applying magnetic powder or magnetic ink
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N2015/0687—Investigating concentration of particle suspensions in solutions, e.g. non volatile residue
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Abstract
The embodiment of the invention provides a method and a system for detecting the volume concentration of a magnetic suspension and a magnetic powder inspection system, and the specific implementation scheme is as follows: the detection system comprises: the device comprises a magnetic suspension liquid loading container, a magnetic device, a control device and a detection device; the control device is detachably connected with the magnetic suspension liquid loading container; the magnetic device is positioned below the bottom of the magnetic suspension liquid loading container; the control device is used for controlling the magnetic suspension loading container to obtain a magnetic suspension to be detected with a preset volume from the magnetic powder flaw detector; the magnetic suspension loading container is used for loading the magnetic suspension to be detected; the magnetic device is used for adsorbing magnetic powder in the magnetic suspension to be detected to the bottom of the magnetic suspension loading container within a preset time; the detection device is used for obtaining the volume data of the magnetic powder in the magnetic suspension loading container and the volume data of the magnetic suspension to be detected, and calculating to obtain the volume concentration of the magnetic suspension. The detection system of the embodiment of the invention improves the efficiency of detecting the volume concentration of the magnetic suspension.
Description
Technical Field
The embodiment of the invention relates to the technical field of workpiece flaw detection, in particular to a magnetic suspension volume concentration detection method, a detection system and a magnetic powder flaw detection system.
Background
When wet magnetic powder inspection is carried out, small-particle magnetic powder is mixed into carrier liquid, the carrier liquid is used as a carrier to uniformly spray and arrange the magnetic powder on the surface of a workpiece, if the magnetized workpiece has defects, a leakage magnetic field can appear at the defect position, and the leakage magnetic field can attract the magnetic powder distributed in the carrier liquid around the defect position to gather to form magnetic marks to find the defects. The suspension obtained by mixing magnetic powder and carrier liquid according to a certain proportion is called magnetic suspension, and the quantity of magnetic powder can be expressed by volume concentration of magnetic suspension. The volume concentration of the magnetic suspension has great influence on the sensitivity of displaying defects, and the magnetic powder inspection sensitivity is different due to different concentrations. If the concentration is too low, the magnetic powder amount is not enough attracted by the leakage magnetic field at the defect position, and the defect is missed to be detected due to unclear magnetic mark display. When the concentration is too high, a lot of magnetic powder can be retained on the surface of a workpiece, an excessive background is generated, the background is poor, the situation that the magnetic powder distributed around the defect and magnetic marks formed at the defect are mixed into a piece in a fuzzy mode is easily caused, and therefore the workpiece flaw detection is carried out after the volume concentration of the magnetic suspension is detected.
Currently, the volume concentration of the magnetic suspension is generally detected by allowing magnetic powder particles dispersed in a carrier liquid to settle to the bottom region of the device under the action of gravity in a horizontal standing environment of a loading container, so as to observe the volume concentration of the magnetic suspension. This method requires a long time for standing, and the efficiency of detecting the volume concentration of the magnetic suspension is low.
Disclosure of Invention
The invention provides a magnetic suspension volume concentration detection method, a magnetic suspension volume concentration detection system and a magnetic powder flaw detection system, which are used for solving the problem of low efficiency of detecting the volume concentration of the magnetic suspension at present.
In a first aspect, an embodiment of the present invention provides a system for detecting a volume concentration of a magnetic suspension, where the system includes:
the device comprises a magnetic suspension liquid loading container, a magnetic device, a control device and a detection device;
the control device is detachably connected with the magnetic suspension liquid loading container; the magnetic device is positioned below the bottom of the magnetic suspension liquid loading container;
the control device is used for controlling the magnetic suspension loading container to obtain a magnetic suspension to be detected with a preset volume from the magnetic powder flaw detector; the magnetic suspension loading container is used for loading the magnetic suspension to be detected;
the magnetic device is used for adsorbing magnetic powder in the magnetic suspension to be detected to the bottom of the magnetic suspension loading container within a preset time;
the detection device is used for acquiring the magnetic powder volume data in the magnetic suspension loading container and the magnetic suspension volume data to be detected, and calculating to obtain the magnetic suspension volume concentration according to the magnetic powder volume data and the magnetic suspension volume data to be detected.
Further, in the system described above, the magnetic suspension loading container is a tapered long-neck settling tube.
Further, the system as described above, the detection device includes: electronics and level sensors;
the liquid level sensor is arranged on the inner wall of the magnetic suspension loading container; the height of the liquid level sensor relative to the bottom of the magnetic suspension loading container is the same as the height of the liquid level of the magnetic suspension to be detected; the liquid level sensor is in communication connection with the electronic equipment;
the liquid level sensor is used for sending liquid level information of the magnetic suspension to be detected in the magnetic suspension loading container to the electronic equipment; the electronic equipment is used for obtaining magnetic powder volume data in the magnetic suspension loading container and liquid level information sent by the liquid level sensor, and calculating according to the magnetic powder volume data and the liquid level information to obtain the magnetic suspension volume concentration.
Further, the system as described above, the detection device further includes a shooting unit; the shooting unit is in communication connection with the electronic equipment;
the shooting unit is used for shooting the whole image of the magnetic suspension loading container after the preset time and sending the whole image to the electronic equipment; the electronic equipment is specifically used for calculating to obtain magnetic powder volume data according to the whole image.
Further, in the system as described above, when the electronic device calculates the magnetic powder volume data according to the whole image, the electronic device is specifically configured to:
analyzing the color information in the whole image, and calculating to obtain magnetic powder volume data according to the color information.
Further, in the system as described above, the surface of the magnetic suspension loading container is provided with volume scales: the whole image comprises volume scale information;
the electronic equipment is specifically used for analyzing the volume scale information in the whole image and calculating to obtain magnetic powder volume data according to the volume scale information.
Further, in the system as described above, the surface of the magnetic device is closely connected with the bottom of the magnetic suspension loading container; the magnetic force of the magnetic device is between 22 oersted and 24 oersted.
Further, in the system as described above, the preset time is 45 seconds.
The second aspect of the embodiments of the present invention provides a method for detecting volume concentration of a magnetic suspension, including:
the control device controls the magnetic suspension loading container to obtain and load a preset volume of magnetic suspension to be detected from the magnetic powder flaw detector;
adsorbing the magnetic powder in the magnetic suspension to be detected to the bottom of the magnetic suspension loading container by a magnetic device within a preset time;
the detection device obtains the magnetic powder volume data in the magnetic suspension loading container and the magnetic suspension volume data to be detected, and calculates the magnetic suspension volume concentration according to the magnetic powder volume data and the magnetic suspension volume data to be detected.
A third aspect of an embodiment of the present invention provides a magnetic particle inspection system, including: a magnetic powder flaw detector and the magnetic suspension volume concentration detection system of any one of the first aspect; the magnetic powder flaw detector is in communication connection with the magnetic suspension volume concentration detection system;
the magnetic powder flaw detector is used for preparing magnetic suspension to be detected;
the magnetic suspension volume concentration detection system is used for acquiring the magnetic suspension to be detected from the magnetic powder flaw detector, detecting the volume concentration of the magnetic suspension to be detected, and sending a concentration qualified signal to the magnetic powder flaw detector when the volume concentration meets a preset threshold interval;
the magnetic particle flaw detector is also used for carrying out flaw detection operation on the workpiece to be detected according to the qualified concentration signal.
The embodiment of the invention provides a magnetic suspension volume concentration detection method, a detection system and a magnetic powder inspection system, wherein the detection system comprises: the device comprises a magnetic suspension liquid loading container, a magnetic device, a control device and a detection device; the control device is detachably connected with the magnetic suspension liquid loading container; the magnetic device is positioned below the bottom of the magnetic suspension liquid loading container; the control device is used for controlling the magnetic suspension loading container to obtain a magnetic suspension to be detected with a preset volume from the magnetic powder flaw detector; the magnetic suspension loading container is used for loading the magnetic suspension to be detected; the magnetic device is used for adsorbing magnetic powder in the magnetic suspension to be detected to the bottom of the magnetic suspension loading container within a preset time; the detection device is used for acquiring the magnetic powder volume data in the magnetic suspension loading container and the magnetic suspension volume data to be detected, and calculating to obtain the magnetic suspension volume concentration according to the magnetic powder volume data and the magnetic suspension volume data to be detected. The detection system controls the magnetic suspension loading container to obtain the magnetic suspension to be detected with the preset volume from the magnetic powder flaw detector through the control device, and adsorbs the magnetic powder in the magnetic suspension to be detected to the bottom of the magnetic suspension loading container in the preset time through the magnetic device, so that the process from the dispersion state of the magnetic powder in the carrier liquid to the aggregation state of the magnetic powder at the bottom of the converged magnetic suspension loading container is accelerated, and the time of the whole magnetic suspension volume concentration measurement process is reduced. Meanwhile, the volume concentration of the magnetic suspension is automatically calculated through the detection device, so that the efficiency of calculating the volume concentration of the magnetic suspension is improved, and the efficiency of detecting the volume concentration of the magnetic suspension is further improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1a is a schematic diagram of a magnetic suspension loading container before standing in a conventional magnetic suspension volume concentration detection mode;
FIG. 1b is a schematic diagram of a magnetic suspension loading container after standing still in a conventional magnetic suspension volume concentration detection mode;
FIG. 2 is a schematic structural diagram of a system for detecting the volume concentration of a magnetic suspension according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a magnetic suspension volume concentration detection system according to another embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a magnetic suspension volume concentration detection system according to another embodiment of the present invention;
FIG. 5 is a schematic flow chart of a method for detecting the volume concentration of a magnetic suspension according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a magnetic particle inspection system according to an embodiment of the present invention.
Description of the symbols:
10. a magnetic suspension loading container; 20. a magnetic device; 30. a control device; 40. a detection device; 41. an electronic device; 43. a liquid level sensor; 45. a shooting unit; 210. a magnetic powder flaw detector; 230. magnetic suspension volume concentration detecting system.
With the above figures, certain embodiments of the invention have been illustrated and described in more detail below. The drawings and the description are not intended to limit the scope of the inventive concept in any way, but rather to illustrate it by those skilled in the art with reference to specific embodiments.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
The technical solution of the present invention will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present invention will be described below with reference to the accompanying drawings.
First, terms related to embodiments of the present invention are explained:
magnetic suspension: the magnetic powder and the carrier liquid are mixed according to a certain proportion to form suspension.
Magnetic powder inspection: the magnetic powder with small particles is uniformly distributed on the surface of a workpiece, and if the surface of the workpiece has defects, a leakage magnetic field can appear at the defects when the workpiece is magnetized. The leakage magnetic field attracts the small magnetic powder particle gathering defect which is arranged around the workpiece defect in advance to form magnetic marks, and the defects are found and distinguished by observing the morphological characteristics of the formed magnetic marks, so that the purpose of flaw detection is achieved.
In order to better understand the system for detecting the volume concentration of the magnetic suspension provided by the embodiment of the invention, the following description is provided for the detection mode of the volume concentration of the existing magnetic suspension. As shown in fig. 1a and 1b, fig. 1a is a schematic diagram of a magnetic suspension loading container in a conventional magnetic suspension volume concentration detection method before standing, and fig. 1b is a schematic diagram of a magnetic suspension loading container in a conventional magnetic suspension volume concentration detection method after standing. The existing magnetic suspension volume concentration detection mode generally comprises the steps of manually taking a certain volume of magnetic suspension from a magnetic powder flaw detector through a magnetic suspension loading container 10, and then placing the magnetic suspension loading container 10 on a special bracket on a horizontal plane. And after standing for 30-35 minutes, manually observing and measuring the volume number of the magnetic powder sediment at the bottom of the magnetic suspension loading container 10. The precipitation volume number is the volume concentration of the magnetic suspension detected this time. The existing magnetic suspension volume concentration detection mode basically depends on an artificial mode, the process of detecting the magnetic suspension volume concentration at least needs 30 minutes, the detection efficiency is low, and the whole workpiece flaw detection process is influenced. The magnetic suspension loading container is controlled by the control device to obtain the magnetic suspension to be detected with the preset volume from the magnetic powder flaw detector, and the magnetic powder in the magnetic suspension to be detected is adsorbed to the bottom of the magnetic suspension loading container within the preset time through the magnetic device, so that the process from the dispersed state of the magnetic powder in the carrier liquid to the aggregation state of the magnetic suspension collecting loading container bottom is accelerated. Generally, the preset time is 40-45 seconds, and compared with the existing magnetic suspension volume concentration detection mode, the time of the whole magnetic suspension volume concentration measurement process is reduced. Meanwhile, the volume concentration of the magnetic suspension is automatically calculated through the detection device, so that the efficiency of calculating the volume concentration of the magnetic suspension is improved, and the efficiency of detecting the volume concentration of the magnetic suspension is further improved.
The embodiments of the present invention will be described with reference to the accompanying drawings.
Fig. 2 is a schematic structural diagram of a magnetic suspension volume concentration detection system according to an embodiment of the present invention, and as shown in fig. 2, the magnetic suspension volume concentration detection system according to the embodiment includes:
magnetic suspension loading container 10, magnetic device 20, control device 30 and detection device 40.
The control device 30 is detachably connected to the magnetic suspension loading container 10. The magnetic device 20 is located below the bottom of the magnetic suspension loading vessel 10.
The control device 30 is used for controlling the magnetic suspension loading container 10 to obtain the magnetic suspension to be detected with the preset volume from the magnetic powder inspection machine. The magnetic suspension loading container 10 is used for loading the magnetic suspension to be detected.
The magnetic device 20 is used for adsorbing magnetic powder in the magnetic suspension to be detected to the bottom of the magnetic suspension loading container 10 within a preset time.
The detection device 40 is used for acquiring magnetic powder volume data and magnetic suspension volume data to be detected in the magnetic suspension loading container 10, and calculating to obtain the magnetic suspension volume concentration according to the magnetic powder volume data and the magnetic suspension volume data to be detected.
In this embodiment, the magnetic suspension loading container 10 is a container for loading magnetic suspension, and the magnetic suspension loading container 10 may be a long neck container, or may be a container with a tapered bottom end, preferably a container with a tapered bottom end. The magnetic device 20 is a device having a magnetic force, and may include a permanent magnet, a magnet, or the like having a magnetic force. The control device 30 is a device for controlling the movement of the magnetic suspension loading container 10 and obtaining the magnetic suspension to be detected. The control device 30 may be a robot arm or other control device, which is not limited in this embodiment.
In this embodiment, the control device 30 is detachably connected to the magnetic suspension loading container 10, and when control is needed, the control device 30 is connected to the magnetic suspension loading container 10 to facilitate control of the control device 30. When control is not required, control device 30 can be stored separately from magnetic suspension loading vessel 10 to facilitate storage of the device after the testing procedure. Meanwhile, the control device 30 may also shake the magnetic suspension loading container 10 loaded with the magnetic suspension to be detected uniformly during detection, so that the magnetic powder is distributed uniformly in the carrier liquid and the magnetic force is more uniform. Thereby improving the accuracy of the detection.
In the present embodiment, the magnetic device 20 is located below the bottom of the magnetic suspension loading container 10, and the distance between the magnetic device 20 and the bottom of the magnetic suspension loading container 10 is related to the magnetic strength of the magnetic device 20. When the magnetic force applied to the bottom of the magnetic suspension loading container 10 is within a certain threshold value, the distance between the magnetic force and the bottom of the magnetic suspension loading container may be 1 cm, 2 cm or 5 cm. The magnetic force can be calculated according to a formula of the magnetic force and the distance. The preset time can be 40-45 seconds, when the preset time is in the interval, the accuracy of detecting the volume concentration of the magnetic suspension can be the same as that of the existing detection mode, and meanwhile, the detection time is shorter than that of the existing detection mode, so that the efficiency of detecting the volume concentration of the magnetic suspension is improved.
In this embodiment, the magnetic powder flaw detector includes a magnetic suspension spraying circulation system, and the magnetic suspension spraying circulation system is used for continuously spraying and circulating the prepared magnetic suspension to sufficiently stir the magnetic suspension. When the volume concentration of the magnetic suspension is to be detected, the control device 30 can control the magnetic suspension loading container 10 to obtain the magnetic suspension to be detected from the magnetic suspension spraying circulation system.
In this embodiment, the mode of acquiring the magnetic powder volume data in the magnetic suspension loading container 10 and the magnetic suspension volume data to be detected by the detecting device 40 may be to acquire color information of the liquid in the magnetic suspension loading container 10 through the shooting unit 45, so as to acquire the magnetic powder volume data and the magnetic suspension volume data to be detected, or may be to acquire the magnetic powder volume data and the magnetic suspension volume data to be detected through other modes, which is not limited in this embodiment.
Alternatively, in this embodiment, magnetic suspension loading vessel 10 is a tapered long-necked sedimentation tube.
In this embodiment, when magnetic suspension loads container 10 for the long neck sedimentation tube of toper, the magnetic more disperses in magnetic suspension loads container 10, and it is more even to distribute, simultaneously, when adsorbing the magnetic through magnetic means 20, the magnetic also can accurately fall into to the bottom in the toper region to improve the accuracy of detecting magnetic volume data, thereby improve the accuracy of detecting magnetic suspension volume concentration.
The embodiment of the invention provides a magnetic suspension volume concentration detection system, which comprises: magnetic suspension loading container 10, magnetic device 20, control device 30 and detection device 40. The control device 30 is detachably connected to the magnetic suspension loading container 10. The magnetic device 20 is located below the bottom of the magnetic suspension loading vessel 10. The control device 30 is used for controlling the magnetic suspension loading container 10 to obtain the magnetic suspension to be detected with the preset volume from the magnetic powder inspection machine. The magnetic suspension loading container 10 is used for loading the magnetic suspension to be detected. The magnetic device 20 is used for adsorbing magnetic powder in the magnetic suspension to be detected to the bottom of the magnetic suspension loading container 10 within a preset time. The detection device 40 is used for acquiring magnetic powder volume data and magnetic suspension volume data to be detected in the magnetic suspension loading container 10, and calculating to obtain the magnetic suspension volume concentration according to the magnetic powder volume data and the magnetic suspension volume data to be detected. The detection system of the embodiment of the invention controls the magnetic suspension loading container 10 to obtain the magnetic suspension to be detected with the preset volume size from the magnetic powder flaw detector through the control device 30, and adsorbs the magnetic powder in the magnetic suspension to be detected to the bottom of the magnetic suspension loading container 10 in the preset time through the magnetic device 20, thereby accelerating the process of the magnetic powder from the dispersed state in the carrier liquid to the aggregation state at the bottom of the converged magnetic suspension loading container 10, and reducing the time of the whole magnetic suspension volume concentration measurement process. Meanwhile, the volume concentration of the magnetic suspension is automatically calculated through the detection device 40, so that the efficiency of calculating the volume concentration of the magnetic suspension is improved, and the efficiency of detecting the volume concentration of the magnetic suspension is further improved.
Fig. 3 is a schematic structural diagram of a magnetic suspension volume concentration detection system according to another embodiment of the present invention, and as shown in fig. 3, each device of the magnetic suspension volume concentration detection system according to the present embodiment is further refined on the basis of the magnetic suspension volume concentration detection system according to the previous embodiment, and then the magnetic suspension volume concentration detection system according to the present embodiment further includes the following technical solutions.
Optionally, in this embodiment, the detecting device 40 includes: electronics 41 and a level sensor 43.
Wherein the liquid level sensor 43 is arranged on the inner wall of the magnetic suspension loading container 10. The height of the liquid level sensor 43 relative to the bottom of the magnetic suspension loading container 10 is the same as the liquid level of the magnetic suspension to be detected. The level sensor 43 is communicatively connected to the electronic device 41.
Meanwhile, the liquid level sensor 43 is used for sending the liquid level information of the magnetic suspension to be detected in the magnetic suspension loading container 10 to the electronic device 41. The electronic device 41 is used for acquiring magnetic powder volume data in the magnetic suspension loading container 10 and liquid level information sent by the liquid level sensor 43, and calculating to obtain the magnetic suspension volume concentration according to the magnetic powder volume data and the liquid level information.
In this embodiment, the electronic device 41 may be a computer, an electronic detection instrument, an intelligent device, or other devices with a computing function. The liquid level sensor 43 may be disposed on the inner wall of the magnetic suspension loading container 10 and fixed at a height, and when the control device 30 controls the magnetic suspension loading container 10 to load the magnetic suspension to be detected and the liquid level height of the magnetic suspension to be detected is consistent with the height of the liquid level sensor 43, the magnetic suspension to be detected is stopped being obtained. By fixing the liquid level sensor 43 at a height, the obtained magnetic suspension to be detected can be fixed at a fixed value, for example, a height corresponding to 100 ml, so that the steps of obtaining the volume data of the magnetic suspension to be detected are reduced, the overall step of detecting the volume concentration of the magnetic suspension is simplified, and the efficiency of detecting the volume concentration of the magnetic suspension is improved. Meanwhile, the liquid level sensor 43 may not be fixed at a height, and may rise as the liquid level of the magnetic suspension to be detected rises. At this time, the electronic device 41 only needs to acquire the liquid level information sent by the liquid level sensor 43 to acquire the corresponding volume data of the magnetic suspension to be detected.
In this embodiment, the method of obtaining the volume concentration of the magnetic suspension by calculation according to the magnetic powder volume data and the liquid level information is to obtain a ratio of the magnetic powder volume data to the liquid level information to the magnetic suspension volume data to be detected.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a magnetic suspension volume concentration detection system according to another embodiment of the present invention.
Optionally, in this embodiment, the detection device 40 further includes a shooting unit 45. The photographing unit 45 is communicatively connected to the electronic device 41.
The photographing unit 45 is configured to photograph an overall image of the magnetic suspension loading container 10 after a preset time, and send the overall image to the electronic device 41. The electronic device 41 is specifically configured to calculate magnetic particle volume data from the whole image.
In this embodiment, the shooting unit 45 may be placed at a short distance from the magnetic suspension loading container 10 to ensure that a clear overall image of the magnetic suspension loading container 10 can be shot, and the distance between the shooting unit 45 and the magnetic suspension loading container 10 may be 30 centimeters, 50 centimeters, and the like, which is not limited in this embodiment. The overall image of magnetic suspension loading vessel 10 must contain the complete magnetic suspension loading vessel 10. The clearer the overall image is, the better.
Optionally, in this embodiment, when obtaining the magnetic powder volume data according to the whole image calculation, the electronic device 41 is specifically configured to:
analyzing the color information in the whole image, and calculating according to the color information to obtain the magnetic powder volume data.
In this embodiment, because the carrier liquid and the magnetic powder in the magnetic suspension are separated in the shot overall image, the color of the magnetic powder region is black, and the color of the carrier liquid region is light, for example, when the carrier liquid is water, the color of the carrier liquid region is light yellow. Magnetic powder volume data can be obtained through calculation by analyzing color information in the whole image. The calculation may be performed by comparing the data of the size of the magnetic suspension loading container 10 with the data of the size of the magnetic suspension loading container 10 in the overall image to determine the ratio of the overall image to the actual size of the magnetic suspension loading container 10. Then, magnetic powder volume data is calculated according to the proportion of the magnetic powder region in the whole image and the proportion of the whole image to the actual magnetic suspension loading container 10. Therefore, the accuracy of the magnetic powder volume data obtained through color information calculation is high.
Optionally, in this embodiment, the surface of the magnetic suspension loading container 10 is provided with volume scales: the whole image contains volume scale information.
The electronic device 41 is specifically configured to analyze volume scale information in the whole image, and calculate to obtain magnetic powder volume data according to the volume scale information.
In this embodiment, the surface of the magnetic suspension loading container 10 is provided with a volume scale, and the finer the volume scale is, especially in the bottom region of the magnetic suspension loading container 10. The volume scale information in the whole image can be analyzed and obtained through the electronic device 41, so that more accurate magnetic powder volume data can be obtained.
Alternatively, in this embodiment, the surface of the magnetic device 20 is closely attached to the bottom of the magnetic suspension loading container 10. The magnetic force of the magnetic device 20 is between 22 oersted and 24 oersted.
In this embodiment, because magnetic force device's magnetic force is too big, in the predetermined time, magnetic volume data has great error, leads to magnetic volume data littleer. When the magnetic force of the magnetic device is too small, the magnetic powder volume data is larger in the preset time. The magnetic force of the magnetic device needs to be kept in a proper interval. When the surface of the magnetic device 20 is closely connected with the bottom of the magnetic suspension loading container 10, the magnetic force of the magnetic device 20 is between 22 oersted and 24 oersted, so that the detection accuracy of the volume concentration of the whole magnetic suspension can be the same as that of the existing detection mode. Meanwhile, the magnetic powder volume data can avoid the problem of overlarge or undersize magnetic force, so that larger errors are generated.
Optionally, in this embodiment, the preset time is 45 seconds.
In this embodiment, the preset time is preferably 45 seconds, during which the magnetic device 20 can adsorb the magnetic powder to the bottom of the magnetic suspension loading container 10, and the adsorption degree is the same as that of the conventional detection method in which the magnetic powder is left standing for 35 minutes. Thereby reducing the detection time of the volume concentration of the magnetic suspension and improving the detection efficiency of the volume concentration of the magnetic suspension.
In the magnetic suspension volume concentration detection system of this embodiment, the control device 30 controls the magnetic suspension loading container 10 to obtain the magnetic suspension to be detected from the magnetic powder inspection machine, the magnetic device 20 adsorbs the magnetic powder to the bottom of the magnetic suspension loading container 10 within a preset time, for example, 40 to 45 seconds, the shooting unit 45 and the liquid level sensor 43 are used to obtain the magnetic suspension volume data to be detected and the magnetic powder volume data, and the electronic device 41 calculates the magnetic suspension volume concentration data according to the magnetic suspension volume data to be detected and the magnetic powder volume data. By the automated cooperation of the control device 30, the magnetic device 20, the photographing unit 45, the liquid level sensor 43, and the electronic device 41, an automated detection flow can be realized. Meanwhile, the magnetic powder is adsorbed to the bottom of the magnetic suspension loading container 10 within a preset time, such as 40-45 seconds, through the magnetic device 20, so that the time for gathering the magnetic powder can be greatly shortened, the time for detecting the volume concentration of the magnetic suspension is shortened, and the efficiency for detecting the volume concentration of the magnetic suspension is improved.
Fig. 5 shows a flow chart of a method for detecting a volume concentration of a magnetic suspension according to an embodiment of the present invention, where fig. 5 is a schematic diagram of a flow chart of a method for detecting a volume concentration of a magnetic suspension according to an embodiment of the present invention. The method for detecting the volume concentration of the magnetic suspension comprises the following steps:
and S101, controlling the magnetic suspension loading container to obtain and load the magnetic suspension to be detected with a preset volume from the magnetic powder flaw detector by the control device.
And S102, adsorbing the magnetic powder in the magnetic suspension to be detected to the bottom of the magnetic suspension loading container by the magnetic device within a preset time.
And S103, acquiring magnetic powder volume data and magnetic suspension volume data to be detected in the magnetic suspension loading container by the detection device, and calculating according to the magnetic powder volume data and the magnetic suspension volume data to be detected to obtain the magnetic suspension volume concentration.
In the magnetic particle inspection method provided in this embodiment, based on the structure and function of the magnetic suspension volume concentration detection system, the structure and function of the magnetic suspension volume concentration detection system are similar to those of the magnetic suspension volume concentration detection system provided in the first embodiment or the second embodiment of the present invention, and are not described in detail here.
The embodiment of the invention provides a method for detecting the volume concentration of a magnetic suspension, which comprises the following steps: and the control device controls the magnetic suspension loading container to obtain and load the magnetic suspension to be detected with a preset volume from the magnetic powder flaw detector. And adsorbing the magnetic powder in the magnetic suspension to be detected to the bottom of the magnetic suspension loading container by the magnetic device within a preset time. The detection device obtains magnetic powder volume data in the magnetic suspension loading container and magnetic suspension volume data to be detected, and calculates the magnetic suspension volume concentration according to the magnetic powder volume data and the magnetic suspension volume data to be detected.
According to the method provided by the embodiment of the invention, the magnetic suspension loading container is controlled by the control device to obtain the magnetic suspension to be detected with the preset volume from the magnetic powder flaw detector, and the magnetic powder in the magnetic suspension to be detected is adsorbed to the bottom of the magnetic suspension loading container within the preset time through the magnetic device, so that the process from the dispersed state of the magnetic powder in the carrier liquid to the aggregation state of the magnetic suspension collecting loading container bottom is accelerated, and the time of the whole magnetic suspension volume concentration measurement process is reduced. Meanwhile, the volume concentration of the magnetic suspension is automatically calculated through the detection device, so that the efficiency of calculating the volume concentration of the magnetic suspension is improved, and the efficiency of detecting the volume concentration of the magnetic suspension is further improved.
Fig. 6 is a schematic structural diagram of a magnetic particle inspection system according to an embodiment of the present invention, as shown in fig. 6, in this embodiment, the magnetic particle inspection system includes: a magnetic particle flaw detector 210 and a magnetic suspension volume concentration detection system 230 in any of the above embodiments. The magnetic particle flaw detector 210 is in communication connection with the magnetic suspension volume concentration detection system 230.
The magnetic particle inspection machine 210 is used to prepare a magnetic suspension to be inspected.
The magnetic suspension volume concentration detection system is used for acquiring the magnetic suspension to be detected from the magnetic powder flaw detector 210, detecting the volume concentration of the magnetic suspension to be detected, and sending a concentration qualified signal to the magnetic powder flaw detector 210 when the volume concentration meets a preset threshold interval.
The magnetic powder flaw detector 210 is further configured to perform flaw detection on the workpiece to be detected according to the qualified concentration signal.
In the magnetic particle inspection system provided in this embodiment, the structure and function of the magnetic suspension volume concentration detection system are similar to those of the magnetic suspension volume concentration detection system provided in the first embodiment or the second embodiment of the present invention, and are not described again.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the embodiments of the invention following, in general, the principles of the embodiments of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the embodiments of the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of embodiments of the invention being indicated by the following claims.
It is to be understood that the embodiments of the present invention are not limited to the precise arrangements described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of embodiments of the invention is limited only by the appended claims.
Claims (10)
1. A system for detecting the volumetric concentration of a magnetic suspension, the system comprising:
the device comprises a magnetic suspension liquid loading container, a magnetic device, a control device and a detection device;
the control device is detachably connected with the magnetic suspension liquid loading container; the magnetic device is positioned below the bottom of the magnetic suspension liquid loading container;
the control device is used for controlling the magnetic suspension loading container to obtain a magnetic suspension to be detected with a preset volume from the magnetic powder flaw detector; the magnetic suspension loading container is used for loading the magnetic suspension to be detected;
the magnetic device is used for adsorbing magnetic powder in the magnetic suspension to be detected to the bottom of the magnetic suspension loading container within a preset time;
the detection device is used for acquiring the magnetic powder volume data in the magnetic suspension loading container and the magnetic suspension volume data to be detected, and calculating to obtain the magnetic suspension volume concentration according to the magnetic powder volume data and the magnetic suspension volume data to be detected.
2. The system of claim 1, wherein the magnetic suspension loading vessel is a tapered long neck settling tube.
3. The system of claim 2, wherein the detection device comprises: electronics and level sensors;
the liquid level sensor is arranged on the inner wall of the magnetic suspension loading container; the height of the liquid level sensor relative to the bottom of the magnetic suspension loading container is the same as the height of the liquid level of the magnetic suspension to be detected;
the liquid level sensor is in communication connection with the electronic equipment;
the liquid level sensor is used for sending liquid level information of the magnetic suspension to be detected in the magnetic suspension loading container to the electronic equipment;
the electronic equipment is used for obtaining magnetic powder volume data in the magnetic suspension loading container and liquid level information sent by the liquid level sensor, and calculating according to the magnetic powder volume data and the liquid level information to obtain the magnetic suspension volume concentration.
4. The system of claim 3, wherein the detection device further comprises a camera unit;
the shooting unit is in communication connection with the electronic equipment;
the shooting unit is used for shooting the whole image of the magnetic suspension loading container after the preset time and sending the whole image to the electronic equipment;
the electronic equipment is specifically used for calculating to obtain magnetic powder volume data according to the whole image.
5. The system according to claim 4, wherein the electronic device, when calculating the magnetic powder volume data from the whole image, is specifically configured to:
analyzing the color information in the whole image, and calculating to obtain magnetic powder volume data according to the color information.
6. The system of claim 4, wherein the surface of the magnetic suspension loading container is provided with volume scales: the whole image comprises volume scale information;
the electronic equipment is specifically used for analyzing the volume scale information in the whole image and calculating to obtain magnetic powder volume data according to the volume scale information.
7. The system of any one of claims 1 to 6, wherein the surface of the magnetic device is in close contact with the bottom of the magnetic suspension loading container; the magnetic force of the magnetic device is between 22 oersted and 24 oersted.
8. The system of claim 1, wherein the preset time is 45 seconds.
9. A method for detecting the volume concentration of a magnetic suspension is characterized by comprising the following steps:
the control device controls the magnetic suspension loading container to obtain and load a preset volume of magnetic suspension to be detected from the magnetic powder flaw detector;
adsorbing the magnetic powder in the magnetic suspension to be detected to the bottom of the magnetic suspension loading container by a magnetic device within a preset time;
the detection device obtains the magnetic powder volume data in the magnetic suspension loading container and the magnetic suspension volume data to be detected, and calculates the magnetic suspension volume concentration according to the magnetic powder volume data and the magnetic suspension volume data to be detected.
10. A magnetic particle inspection system, comprising: a magnetic particle flaw detector and a magnetic suspension volume concentration detection system according to any one of claims 1 to 8; the magnetic powder flaw detector is in communication connection with the magnetic suspension volume concentration detection system;
the magnetic powder flaw detector is used for preparing magnetic suspension to be detected;
the magnetic suspension volume concentration detection system is used for acquiring the magnetic suspension to be detected from the magnetic powder flaw detector, detecting the volume concentration of the magnetic suspension to be detected, and sending a concentration qualified signal to the magnetic powder flaw detector when the volume concentration meets a preset threshold interval;
the magnetic particle flaw detector is also used for carrying out flaw detection operation on the workpiece to be detected according to the qualified concentration signal.
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