CN111579137A - Lifting force measuring method and device for magnetic yoke type magnetic particle flaw detector - Google Patents
Lifting force measuring method and device for magnetic yoke type magnetic particle flaw detector Download PDFInfo
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- CN111579137A CN111579137A CN202010562616.3A CN202010562616A CN111579137A CN 111579137 A CN111579137 A CN 111579137A CN 202010562616 A CN202010562616 A CN 202010562616A CN 111579137 A CN111579137 A CN 111579137A
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- flaw detector
- yoke type
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- pressure sensor
- particle flaw
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- 239000006249 magnetic particle Substances 0.000 title claims abstract description 57
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 35
- 239000010959 steel Substances 0.000 claims abstract description 35
- 238000012360 testing method Methods 0.000 claims abstract 3
- 238000012544 monitoring process Methods 0.000 claims description 7
- 230000035945 sensitivity Effects 0.000 claims description 6
- 238000005070 sampling Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 3
- 238000012935 Averaging Methods 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- 239000004973 liquid crystal related substance Substances 0.000 claims 2
- 239000006247 magnetic powder Substances 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 8
- 230000007547 defect Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000007689 inspection Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The invention relates to a method and a device for measuring the lifting force of a magnetic yoke type magnetic particle flaw detector, which effectively solve the problems of discontinuity and inaccuracy of the detection of the flaw detector in the prior art; the magnetic yoke type magnetic particle flaw detector comprises a magnetic yoke type magnetic particle flaw detector and is characterized by further comprising a base, wherein a pressure sensor is fixedly connected to the base, a steel plate is placed on the pressure sensor, the magnetic yoke type magnetic particle flaw detector is placed on the steel plate, and the pressure sensor is electrically connected with a controller fixedly connected to the base; the steel plate is contacted with the magnetic yoke type magnetic particle flaw detector to generate lifting force; the device has a simple structure, can accurately test the lifting force value of the flaw detector, and has strong practicability.
Description
Technical Field
The invention relates to the technical field of magnetic particle inspection, in particular to a method and a device for measuring the lifting force of a magnetic yoke type magnetic particle inspection machine.
Background
Magnetic particle inspection is a method for inspecting defects in materials and workpieces by using magnetic phenomena, and is widely used in the aviation, navigation, automobile, boiler and railway sectors, wherein in nondestructive testing of pressure-bearing equipment, the magnetic yoke method has the following advantages and is most widely applied: non-electrical contact; defects in any direction can be found by changing the orientation of the magnetic yoke; the portable magnet yoke can be brought to the field for detection, and is flexible and convenient; can be used to detect painted workpieces (when the paint thickness allows); the detection sensitivity is high.
The magnetic yoke type magnetic particle flaw detector consists of a magnetizing power supply and a magnetic yoke, and can be used for detecting ferromagnetic materials, workpiece surfaces (such as semi-finished products, welding parts, repaired parts and the like) and near-surface defects. The invention designs a measuring device for the lifting force of a magnetic yoke type magnetic particle flaw detector, which aims to solve the technical problems that the lifting force of the magnetic yoke type magnetic particle flaw detector is accurately and quickly measured, and the quality control of supervision departments is strongly guaranteed.
Therefore, the invention provides a method and a device for measuring the lifting force of a magnetic yoke type magnetic particle flaw detector to solve the problem.
Disclosure of Invention
Aiming at the situation, in order to overcome the defects of the prior art, the invention provides a method and a device for measuring the lifting force of a magnetic yoke type magnetic particle flaw detector, which effectively solve the problems of discontinuity and inaccuracy of the detection of the flaw detector in the prior art.
The magnetic yoke type magnetic particle flaw detector comprises a magnetic yoke type magnetic particle flaw detector and is characterized by further comprising a base, wherein a pressure sensor is fixedly connected to the base, a steel plate is placed on the pressure sensor, the magnetic yoke type magnetic particle flaw detector is placed on the steel plate, and the pressure sensor is electrically connected with a controller fixedly connected to the base;
the magnetic yoke type magnetic particle flaw detector is contacted with the steel plate to generate lifting force.
Preferably, a CPU chip is integrated in the pressure sensor and communicates with the controller through an MODBUS protocol.
Preferably, the number of the pressure sensors is four, and the four pressure sensors are respectively arranged at four corners of the base.
Preferably, the signals collected by the pressure sensor are converted into 24-bit digital quantity through a band-pass filter, a programmable amplifier and an analog-digital converter which are integrated on a CPU chip, the CPU performs digital filtering on the received digital quantity, integrates the digital quantity into an MODBUS protocol packet and sends the MODBUS protocol packet to the controller, and the controller integrates the received four digital quantities, averages the four digital quantities and calculates the lifting force;
and a display screen is integrated in the controller.
Preferably, the output sensitivity of the pressure sensor is more than or equal to 2.0 +/-10% mv/v, and the nonlinear error is less than or equal to 0.02% F.S.
Preferably, the sampling frequency of the pressure sensor is 1600 Hz.
Preferably, the sampling frequency of the pressure sensor is 1600 Hz.
Preferably, the pressure sensor is detachably connected with an object stage, and four corners of the object stage are detachably connected with clamp pliers.
The invention makes improvement aiming at the problems of discontinuity and inaccuracy of the detection of the flaw detector in the prior art, adopts the method of utilizing the sensor to bear the weight and detect the weight change of the heavy object, and simultaneously carries out real-time calculation by matching with the controller and the CPU, thereby ensuring to obtain an accurate lifting force value; the high-frequency sensor is used for collecting the gravity change in real time, so that a continuous numerical value change curve is obtained through CPU calculation, the continuity and the accuracy of the lifting force detection are guaranteed, the structure is simple, the lifting force numerical value of the flaw detector can be accurately tested, and the practicability is high.
Drawings
FIG. 1 is a schematic front view of the present invention.
FIG. 2 is a schematic view of an electronic module according to the present invention.
Detailed Description
The foregoing and other aspects, features and advantages of the invention will be apparent from the following more particular description of embodiments of the invention, as illustrated in the accompanying drawings in which reference is made to figures 1-2. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
In the description of the present invention, it is to be understood that the terms "upper", "middle", "outer", "inner", and the like, indicate orientations or positional relationships, are used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referenced components or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
The embodiment I is a lifting force measuring device of a magnetic yoke type magnetic particle flaw detector, which comprises a magnetic yoke type magnetic particle flaw detector 1 serving as a flaw detector to be detected in the device and is characterized by further comprising a base 2, wherein the base 2 is placed on the ground and used for providing a fixed foundation for a subsequent structure, a pressure sensor 3 is fixedly connected to the base 2, a steel plate 4 is placed on the pressure sensor 3, the magnetic yoke type magnetic particle flaw detector 1 is placed on the steel plate 4, the pressure sensor 3 can sense and monitor the weight change of the steel plate 4 in real time, the pressure sensor 3 is electrically connected with a controller 5 fixedly connected to the base 2, the controller 5 is electrically connected with an external power supply and supplies power to the pressure sensor 3, the pressure sensor 3 can send the weight change detected in real time to the controller 5 and the controller 5 processes and calculates, the controller 5 in integrated data processing unit, memory cell and display screen, the data processing unit is internal to have input the computational formula in advance, the data processing unit can be finally passed through the display screen with the lifting force of the yoke formula magnetic particle flaw detector 1 that awaits measuring and show, the computational formula is: lift = initial value of pressure monitored by pressure sensor 3-critical state pressure value monitored by pressure sensor 3; wherein, the magnetic yoke type magnetic particle flaw detector 1 can generate lifting force when contacting with the steel plate 4, the initial pressure value detected by the pressure sensor 3 is the weight pressure value of the steel plate 4, and the measured value of the pressure sensor 3 is a positive value; the critical state pressure value monitored by the pressure sensor 3 is the pressure value of the yoke type magnetic particle flaw detector 1 which is about to be separated from the critical state of the steel plate 4, and the measured value of the pressure sensor 3 is a negative value; it should be noted that the self weight of the whole measuring device is larger than the lifting force of the magnetic yoke type magnetic particle flaw detector 1, and the arrangement can ensure that the magnetic yoke type magnetic particle flaw detector 1 to be measured cannot lift the steel plate 4, so that the pressure sensor 3 can accurately detect the pressure value in the critical state;
in a specific use of the present embodiment, the method includes the following steps:
firstly, placing a steel plate 4 on a pressure sensor 3, stably placing a magnetic yoke type magnetic particle flaw detector 1 to be detected on the steel plate 4, and electrifying the magnetic yoke type magnetic particle flaw detector 1;
the second step is that: starting the controller 5 of the device, monitoring an initial pressure value by the pressure sensor 3 and sending the initial pressure value to the controller 5;
the third step: slowly lifting the magnetic yoke type magnetic particle flaw detector 1 away from the steel plate 4 by hand, in the process, sending real-time monitoring data to the controller 5 by the pressure sensor 3, monitoring a critical state pressure value and sending the critical state pressure value to the controller 5 at the moment of separation of the magnetic yoke type magnetic particle flaw detector 1 and the steel plate 4, and calculating the lifting force of the magnetic yoke type magnetic particle flaw detector 1 to be detected by the controller 5 according to a formula and displaying the lifting force on a display screen;
the fourth step: recording data and clearing the data through the controller 5;
the fifth step: and repeating the first step to the fourth step for multiple measurements.
In the second embodiment, on the basis of the first embodiment, the pressure sensors 3 are four and are respectively arranged at four corners of the base 2, the stress of the steel plate 4 can be uniform and stable due to the arrangement, and the accuracy of the pressure value monitored in real time can be ensured due to the arrangement of the four sensors.
Third embodiment, on the basis of second embodiment, pressure sensor 3 in integrated with the CPU chip, the CPU chip passes through MODBUS protocol and controller 5 communication, the content is disclosed, the hardware is simple, easily dispose, it is very suitable under the condition that this device is less to data processing, the signal that pressure sensor 3 gathered is converted into 24 digit figure through band-pass filter, programmable amplifier, the analog-to-digital converter integrated on the CPU chip, CPU carry out digital filtering to the digital figure received and integrate into MODBUS protocol package and send to controller 5, controller 5 integrate four digital figures received and calculate the lifting force after averaging, controller 5 in integrated with the display screen, the display screen is used for showing lifting force and this device operating condition.
In the fourth embodiment, on the basis of any one of the first to third embodiments, the output sensitivity of the pressure sensor 3 is greater than or equal to 2.0 ± 10% mv/v, the nonlinear error is less than or equal to 0.02% F.S, the sampling frequency of the pressure sensor 3 is 1600Hz, the arrangement can ensure that the sensitivity of the pressure sensor 3 is limited, and the pressure sensor 3 with high sensitivity and high precision is adopted to ensure that the pressure sensor 3 can react to the pressure changes of the steel plate 4 and the magnetic yoke type magnetic particle flaw detector 1 and can quickly and timely send the pressure changes to the controller 5.
Fifth embodiment, on the basis of first embodiment, pressure sensor 3 on can dismantle and be connected with objective table 6, 6 four corners of objective table all can dismantle and be connected with compressing forceps 7, objective table 6 is used for bearing steel sheet 4 and waits to detect yoke formula magnetic particle flaw detector 1, guarantees steel sheet 4 and objective table 6 in close contact with, guarantees that steel sheet 4 and objective table 6 do not have the space between with, compressing forceps 7's effect lies in steel sheet 4 location and direction.
When the magnetic yoke type magnetic particle flaw detector is used specifically, in the first step, a steel plate 4 is placed on a pressure sensor 3, the magnetic yoke type magnetic particle flaw detector 1 to be detected is stably placed on the steel plate 4, and the magnetic yoke type magnetic particle flaw detector 1 is electrified;
the second step is that: starting the controller 5 of the device, monitoring an initial pressure value by the pressure sensor 3 and sending the initial pressure value to the controller 5;
the third step: slowly lifting the magnetic yoke type magnetic particle flaw detector 1 away from the steel plate 4 by hand, in the process, sending real-time monitoring data to the controller 5 by the pressure sensor 3, monitoring the minimum pressure value and sending the minimum pressure value to the controller 5 when the magnetic yoke type magnetic particle flaw detector 1 is separated from the steel plate 4, calculating the lifting force of the magnetic yoke type magnetic particle flaw detector 1 to be detected by the controller 5 according to a formula, and displaying the lifting force on a display screen;
the fourth step: recording data and clearing the data through the controller 5;
the fifth step: and repeating the first step to the fourth step for multiple measurements.
The invention makes improvement aiming at the problems of discontinuity and inaccuracy of the detection of the flaw detector in the prior art, adopts the method of utilizing the sensor to bear the weight and detect the weight change of the heavy object, and simultaneously carries out real-time calculation by matching with the controller and the CPU, thereby ensuring to obtain an accurate lifting force value; the high-frequency sensor is used for collecting the gravity change in real time, so that a continuous numerical value change curve is obtained through CPU calculation, the continuity and the accuracy of the lifting force detection are guaranteed, the structure is simple, the lifting force numerical value of the flaw detector can be accurately tested, and the practicability is high.
Claims (9)
1. The lifting force measuring device of the magnetic yoke type magnetic particle flaw detector comprises a magnetic yoke type magnetic particle flaw detector (1) and is characterized by further comprising a base (2), wherein a pressure sensor (3) is fixedly connected to the base (2), a steel plate (4) is placed on the pressure sensor (3), the magnetic yoke type magnetic particle flaw detector (1) is placed on the steel plate (4), and the pressure sensor (3) is electrically connected with a controller (5) fixedly connected to the base (2);
the magnetic yoke type magnetic particle flaw detector (1) is in contact with the steel plate (4) to generate lifting force.
2. The lifting force measuring device of magnetic particle flaw detector of magnetic yoke type of claim 1, characterized in that, the pressure sensor (3) is integrated with a CPU chip, the CPU chip communicates with the controller (5) through MODBUS protocol.
3. The lifting force measuring device of magnetic powder flaw detector of yoke type according to claim 1, wherein the pressure sensors (3) are four and are respectively disposed at four corners of the base (2).
4. The lifting force measuring device of the magnetic yoke type magnetic particle flaw detector of claim 3, characterized in that the signal collected by the pressure sensor (3) is converted into 24-bit digital quantity through a band-pass filter, a programmable amplifier and an analog-digital converter which are integrated on a CPU chip, the CPU performs digital filtering on the received digital quantity and integrates the digital quantity into an MODBUS protocol packet and sends the MODBUS protocol packet to the controller (5), and the controller (5) integrates the received four digital quantities and calculates the lifting force after averaging;
and a display screen is integrated in the controller (5).
5. The lifting force measuring device of a magnetic particle flaw detector of a magnetic yoke type according to any one of claims 1-4, characterized in that the output sensitivity of the pressure sensor (3) is greater than or equal to 2.0 ± 10% mv/v, and the non-linearity error is less than or equal to 0.02% F.S.
6. The lifting force measuring device of a magnetic particle testing machine with a magnetic yoke as claimed in any of claims 1-4, characterized in that the sampling frequency of the pressure sensor (3) is 1600 Hz.
7. The lifting force measuring device of magnetic particle testing machine of claim 5, wherein the sampling frequency of the pressure sensor (3) is 1600 Hz.
8. The lifting force measuring device of the magnetic yoke type magnetic particle flaw detector according to claim 1, characterized in that the pressure sensor (3) is detachably connected with an object stage (6), and four corners of the object stage (6) are detachably connected with clamp pliers (7).
9. A lifting force measuring method of a magnetic yoke type magnetic particle flaw detector is characterized by comprising the following steps:
the first step is as follows: placing a steel plate (4) on a pressure sensor (3), stably placing a magnetic yoke type magnetic particle flaw detector (1) to be detected on the steel plate (4), and electrifying the magnetic yoke type magnetic particle flaw detector (1);
the second step is that: according to the prompt of pressing a key on a liquid crystal display screen on the controller (5), the controller (5) starts to collect and record the pressure value monitored by the pressure sensor (3);
the third step: the magnetic yoke type magnetic particle flaw detector (1) is lifted away from the steel plate (4) by a hand, in the process, the pressure sensor (3) sends real-time monitoring data to the controller (5), when the magnetic yoke type magnetic particle flaw detector (1) is separated from the steel plate (4), a button on the controller (5) is pressed down, the controller (5) finishes collecting and recording pressure values monitored by the pressure sensor (3), the controller (5) obtains the pressure value at the moment when the magnetic yoke type magnetic particle flaw detector is separated from the steel plate (4) and the pressure value after complete separation through a filtering algorithm according to the recorded pressure values, the lifting force of the magnetic yoke type magnetic particle flaw detector (1) to be detected is calculated according to a formula and displayed on a liquid crystal display screen of the controller (5);
the fourth step: recording data and clearing the data through a controller (5);
the fifth step: and repeating the first step to the fourth step for multiple measurements.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010562616.3A CN111579137A (en) | 2020-06-19 | 2020-06-19 | Lifting force measuring method and device for magnetic yoke type magnetic particle flaw detector |
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| CN202010562616.3A CN111579137A (en) | 2020-06-19 | 2020-06-19 | Lifting force measuring method and device for magnetic yoke type magnetic particle flaw detector |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113254875A (en) * | 2021-04-23 | 2021-08-13 | 四川瑞精特科技有限公司 | Lifting force measuring method for magnetic yoke type magnetic particle flaw detector |
| CN116046228A (en) * | 2023-02-23 | 2023-05-02 | 济宁鲁科检测科技有限公司 | Magnetic particle inspection equipment lifting force measuring device and method based on strain gauge |
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| CN107144399A (en) * | 2016-12-14 | 2017-09-08 | 中国航空工业集团公司北京长城计量测试技术研究所 | A kind of lifting force value loads the small value impulsive force generating means of the degree of accuracy |
| CN211954523U (en) * | 2020-06-19 | 2020-11-17 | 河南省计量科学研究院 | Lifting force measuring device of magnetic yoke type magnetic particle flaw detector |
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2020
- 2020-06-19 CN CN202010562616.3A patent/CN111579137A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202562886U (en) * | 2012-03-23 | 2012-11-28 | 新疆维吾尔自治区计量测试研究院 | Detector for magnet yoke type magnetic powder flaw detector |
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| CN107144399A (en) * | 2016-12-14 | 2017-09-08 | 中国航空工业集团公司北京长城计量测试技术研究所 | A kind of lifting force value loads the small value impulsive force generating means of the degree of accuracy |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113254875A (en) * | 2021-04-23 | 2021-08-13 | 四川瑞精特科技有限公司 | Lifting force measuring method for magnetic yoke type magnetic particle flaw detector |
| CN113254875B (en) * | 2021-04-23 | 2022-11-22 | 四川中测仪器科技有限公司 | Lifting force measuring method for magnetic yoke type magnetic particle flaw detector |
| CN116046228A (en) * | 2023-02-23 | 2023-05-02 | 济宁鲁科检测科技有限公司 | Magnetic particle inspection equipment lifting force measuring device and method based on strain gauge |
| CN116046228B (en) * | 2023-02-23 | 2023-09-05 | 济宁鲁科检测科技有限公司 | Magnetic particle inspection equipment lifting force measuring device and method based on strain gauge |
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