CN115128155B - Multi-channel triaxial magnetic leakage detection probe - Google Patents
Multi-channel triaxial magnetic leakage detection probe Download PDFInfo
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- CN115128155B CN115128155B CN202210553831.6A CN202210553831A CN115128155B CN 115128155 B CN115128155 B CN 115128155B CN 202210553831 A CN202210553831 A CN 202210553831A CN 115128155 B CN115128155 B CN 115128155B
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- 239000000523 sample Substances 0.000 title claims abstract description 40
- 238000001514 detection method Methods 0.000 title claims abstract description 31
- 239000003990 capacitor Substances 0.000 claims abstract description 8
- 230000004907 flux Effects 0.000 claims abstract description 8
- 102100036285 25-hydroxyvitamin D-1 alpha hydroxylase, mitochondrial Human genes 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 101000875403 Homo sapiens 25-hydroxyvitamin D-1 alpha hydroxylase, mitochondrial Proteins 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000013039 cover film Substances 0.000 claims description 3
- 239000010408 film Substances 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- 238000005868 electrolysis reaction Methods 0.000 claims description 2
- 239000003292 glue Substances 0.000 claims description 2
- 239000002184 metal Substances 0.000 abstract description 12
- 229910052751 metal Inorganic materials 0.000 abstract description 12
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 230000002093 peripheral effect Effects 0.000 abstract description 5
- 230000003750 conditioning effect Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 8
- 230000009471 action Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 241000465502 Tobacco latent virus Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
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- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The invention discloses a multichannel triaxial magnetic flux leakage detection probe. In the invention, the probe has much smaller volume, so the accuracy is higher when the damage condition of the detected metal object is positioned. The power supply voltage required by the probe is 3.3V, the output quantity of the sensor is 12bit, an additional AD conversion circuit is not required to be added between the main control for receiving the output quantity of the sensor, and a simple peripheral circuit formed by a resistor and a capacitor is only required to be used for signal conditioning. The subsequent engineering cost and the complexity of engineering technology are greatly reduced. The PFC soft board with almost negligible thickness is adopted in the invention, and basically the influence on the lift-off value between the probe and the detected metal is negligible, so that the detection precision is improved, and the convenience in use and detection is improved.
Description
Technical Field
The invention belongs to the technical field of magnetic leakage detection, and particularly relates to a multichannel triaxial magnetic leakage detection probe.
Background
The damage condition of the surface of the metallic material is generally measured by adopting uniaxial magnetosensitive components such as HALL and TMR, but the identification rate of uniaxial magnetic leakage signals on the damage is lower. For the triaxial scheme, three uniaxial magnetosensitive components are currently used to measure three different axial leakage magnetic fields in three different directions at the same point in space. The sensor array formed by the single-axis combination has larger volume and lower precision. In general, a single-axis magneto-sensitive component needs 5V voltage to supply power, the output quantity of a sensor is analog quantity, an AD conversion processing circuit is additionally added in a subsequent controller for receiving the output of the sensor, and once the number of channels is increased, the AD conversion circuit becomes complex, and the cost is increased. The circuit board of the sensor probe adopts a PCB board with a certain thickness, which can cause the lift-off value between the probe and the detected metal object to increase the thickness of the PCB. 3D magnetic sensor components have only recently been produced.
However, a multi-channel triaxial magnetic leakage detection probe formed by using the TLVs 493A1B6 is not adopted at present.
Disclosure of Invention
The invention aims at: in order to solve the problems, a multi-channel triaxial magnetic leakage detection probe is provided.
The technical scheme adopted by the invention is as follows: the multichannel triaxial magnetic leakage detection probe adopts 8 TLV493A1B6 magnetic sensors to form a sensor array, the distance between two adjacent sensor components is 5.4mm, and an IIC communication mode is adopted between the 8 components and a main control MCU outside the probe; all VDD, SDA, SCL pins of 8 components are connected with a resistor of 110 ohms and led out, and all GND pins are connected and led out; a100 nf filter capacitor is connected in series between the VDD pin and GND of each component.
In a preferred embodiment, both the resistance and capacitance in the probe are encapsulated with 0805 patches, and TLV493 is encapsulated with patches as well.
In a preferred embodiment, the Layout of the circuit board adopts two layers, namely a Bottom Layer and a Top Layer, which are connected by a through hole with the diameter of 1.27 mm.
In a preferred embodiment, the pins VDD1 to VDD8 and GND are all led out to connect to a pad.
In a preferred embodiment, the substrate of the circuit board is glue-electrolyzed, and the copper thickness of the two Layout layers is 1OZ.
In a preferred embodiment, the cover film of the circuit board is a yellow film, and the silk screen is white; the overall dimensions of the circuit board were 25.2mm x 55.4mm x 0.23mm.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:
1. In the invention, three single-axis magnetosensitive components are replaced by the 3D magnetic sensor to detect the triaxial leakage magnetic field signal of a certain point in the space, thereby reducing the volume of the probe and improving the leakage detection precision. More characteristic leakage magnetic field signals can be detected than with a single axis probe. And the Flexible Printed Circuit (FPC) board is adopted, so that the lift-off value between the sensor and the detected metal object is reduced, and the detection precision is improved. The 8 triaxial magnetic sensors are closely arranged with the maximum electrical limit, so that the magnetic flux leakage detection precision is improved.
2. In the invention, 8-channel three-axis magnetic leakage detection probes are formed by adopting 8 patch-packaged 3D magnetic sensor components TLV493A1B6 and peripheral circuits. Compared with the method for detecting the single-axis magnetic leakage signal characteristics of the detected metal object by utilizing the single-axis magnetic sensitive element, the three-axis magnetic sensitive element adopted in the invention can detect the three different axial magnetic leakage signal characteristics of the detected metal object, so that the identification dimension is higher and the damage signal identification degree is higher. Compared with a triaxial leakage magnetic field detection probe consisting of a plurality of groups of three uniaxial magnetic sensitive components, the volume of the probe is much smaller, so that the accuracy in positioning the damage condition of the detected metal object is higher. The power supply voltage required by the probe is 3.3V, the output quantity of the sensor is 12bit, an additional AD conversion circuit is not required to be added between the main control for receiving the output quantity of the sensor, and a simple peripheral circuit formed by a resistor and a capacitor is only required to be used for signal conditioning. The subsequent engineering cost and the complexity of engineering technology are greatly reduced. The PFC soft board with almost negligible thickness is adopted in the invention, and basically the influence on the lift-off value between the probe and the detected metal is negligible, so that the detection precision is improved, and the convenience in use and detection is improved.
Drawings
FIG. 1 is a schematic diagram of an eight-channel triaxial magnetic flux leakage detection probe according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
With reference to figure 1 of the drawings,
The multichannel triaxial magnetic leakage detection probe adopts 8 TLV493A1B6 magnetic sensors to form a sensor array, the distance between two adjacent sensor components is 5.4mm, and an IIC communication mode is adopted between the 8 components and a main control MCU outside the probe; all VDD, SDA, SCL pins of 8 components are connected with a resistor of 110 ohms and led out, and all GND pins are connected and led out; a100 nf filter capacitor is connected in series between the VDD pin and GND of each component, and 8 patch-packaged 3D magnetic sensor components TLV493A1B6 and a peripheral circuit are adopted to form an 8-channel triaxial magnetic leakage detection probe. Compared with the method for detecting the single-axis magnetic leakage signal characteristics of the detected metal object by utilizing the single-axis magnetic sensitive element, the three-axis magnetic sensitive element adopted in the invention can detect the three different axial magnetic leakage signal characteristics of the detected metal object, so that the identification dimension is higher and the damage signal identification degree is higher. Compared with a triaxial leakage magnetic field detection probe consisting of a plurality of groups of three uniaxial magnetic sensitive components, the volume of the probe is much smaller, so that the accuracy in positioning the damage condition of the detected metal object is higher. The power supply voltage required by the probe is 3.3V, the output quantity of the sensor is 12bit, an additional AD conversion circuit is not required to be added between the main control for receiving the output quantity of the sensor, and a simple peripheral circuit formed by a resistor and a capacitor is only required to be used for signal conditioning. The subsequent engineering cost and the complexity of engineering technology are greatly reduced. The PFC soft board with almost negligible thickness is adopted in the invention, and basically the influence on the lift-off value between the probe and the detected metal is negligible, so that the detection precision is improved, and the convenience in use and detection is improved.
The resistor and the capacitor in the probe are packaged by 0805 patches, and the TLV493 is packaged by the patches.
The Layout of the circuit board adopts two layers, namely a Bottom Layer and a Top Layer, which are connected by a through hole with the diameter of 1.27 mm.
The pins VDD1 to VDD8 and GND are led out to be connected with a bonding pad.
The substrate of the circuit board adopts glue electrolysis, and the copper thickness of the two Layout layers is 1OZ.
The cover film of the circuit board adopts a yellow film, and the silk screen is white; the overall dimensions of the circuit board were 25.2mm x 55.4mm x 0.23mm.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. Multichannel triaxial magnetic leakage detection probe, its characterized in that: the detection probe is applied to a circuit board, 8 TLV493A1B6 magnetic sensors are adopted by the detection probe to form a sensor array, the distance between two adjacent sensor components is 5.4mm, and an IIC communication mode is adopted between the 8 components and a main control MCU outside the probe; all VDD, SDA, SCL pins of 8 components are connected with a resistor of 110 ohms and led out, and all GND pins are connected and led out; a100 nf filter capacitor is connected in series between the VDD pin and GND of each component.
2. The multi-channel triaxial magnetic flux leakage detection probe according to claim 1, characterized in that: the resistor and the capacitor in the probe are packaged by 0805 patches, and the TLV493 is packaged by the patches.
3. The multi-channel triaxial magnetic flux leakage detection probe according to claim 1, characterized in that: the Layout of the circuit board adopts two layers, namely a Bottom Layer and a Top Layer, which are connected by a through hole with the diameter of 1.27 mm.
4. The multi-channel triaxial magnetic flux leakage detection probe according to claim 1, characterized in that: the pins VDD1 to VDD8 and GND are led out to be connected with a bonding pad.
5. The multi-channel triaxial magnetic flux leakage detection probe according to claim 1, characterized in that: the substrate of the circuit board adopts glue electrolysis, and the copper thickness of the two Layout layers is 1OZ.
6. The multi-channel triaxial magnetic flux leakage detection probe according to claim 1, characterized in that: the cover film of the circuit board adopts a yellow film, and the silk screen is white; the overall dimensions of the circuit board were 25.2mm x 55.4mm x 0.23mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210553831.6A CN115128155B (en) | 2022-05-19 | 2022-05-19 | Multi-channel triaxial magnetic leakage detection probe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210553831.6A CN115128155B (en) | 2022-05-19 | 2022-05-19 | Multi-channel triaxial magnetic leakage detection probe |
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| CN115128155A CN115128155A (en) | 2022-09-30 |
| CN115128155B true CN115128155B (en) | 2024-07-12 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954683A (en) * | 2014-05-16 | 2014-07-30 | 北京理工大学 | Reconfigurable modular electromagnetic array sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5521143B1 (en) * | 2013-03-06 | 2014-06-11 | 独立行政法人交通安全環境研究所 | Magnetic detector |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954683A (en) * | 2014-05-16 | 2014-07-30 | 北京理工大学 | Reconfigurable modular electromagnetic array sensor |
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