Detection device for mining equipment circuit board

Abstract

The invention discloses a detection device for a mining equipment circuit board, which belongs to the technical field of visual inspection and comprises a support base, a magnetic suspension assembly, a visual inspection assembly and a controller. At least three vibration sensors are arranged in the supporting base and used for collecting vibration data of the supporting base in the X-axis direction, the Y-axis direction and the Z-axis direction in real time. The magnetic suspension assembly is arranged on the upper surface of the supporting base and is used for bearing a to-be-tested circuit board; the detection end of the visual detection assembly is arranged on the side, away from the supporting base, of the magnetic suspension assembly, faces the to-be-detected circuit board and is used for conducting visual detection on the to-be-detected circuit board. The controller is arranged on the supporting base and electrically connected with the magnetic suspension assembly and the at least three vibration sensors, and the controller is used for controlling the suspension state of the magnetic suspension assembly according to the vibration data collected by the at least three vibration sensors so as to counteract the influence of vibration on detection.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of visual detection, and particularly relates to a detection device for a mine equipment circuit board. BACKGROUND

[0002] In mine exploitation operations, the stable operation of mine equipment is directly related to the exploitation efficiency and operation safety, and the core control functions of the equipment often depend on various circuit boards, such as main control boards, drive boards, signal processing boards and the like. Due to the characteristics of high vibration, much dust and large humidity fluctuation of the mine environment, the circuit boards work in strong vibration conditions for a long time, and are prone to faults such as loose soldering points, component falling off and line aging and fracture. If timely detection and maintenance cannot be performed, the equipment may be shut down or even safety accidents may be caused.

[0003] At present, the detection of mine equipment circuit boards mainly adopts an offline detection mode: the circuit boards are first detached from the mine equipment, and then a simple detection environment is temporarily built on the mine equipment work site for detection. However, due to the influence of the mine operation environment, the mine equipment itself and the surrounding machinery will produce continuous vibration, which will cause relative displacement or shaking between the detection instrument and the circuit board, and then interfere with the visual detection accuracy, and misjudgment or missed judgment may easily occur. SUMMARY

[0004] Therefore, the application provides a detection device for a mine equipment circuit board, and the main purpose is to improve the in-situ detection accuracy of the mine equipment circuit board.

[0005] To achieve the above purpose, the application mainly provides the following technical scheme:

[0006] The application provides a detection device for a mine equipment circuit board, which is used for carrying out detection work on the circuit board of the mine equipment in situ, and the detection device comprises:

[0007] A support base, wherein at least three vibration sensors are built in the support base, and the at least three vibration sensors are respectively used for collecting vibration data of the support base in X-axis direction, Y-axis direction and Z-axis direction in real time;

[0008] A magnetic suspension assembly, which is arranged on the upper surface of the support base and is used for carrying a circuit board to be detected;

[0009] A visual detection assembly, wherein the detection end of the visual detection assembly is arranged on the side of the magnetic suspension assembly away from the support base and faces the circuit board to be detected, and the visual detection assembly is used for carrying out visual detection on the circuit board to be detected;

[0010] A controller is arranged on the support base and electrically connected with the magnetic suspension assembly and the at least three vibration sensors respectively, and is configured to control the suspension state of the magnetic suspension assembly according to the vibration data collected by the at least three vibration sensors, so as to offset the influence of vibration on detection.

[0011] Optionally, leveling legs are arranged at the four corners of the bottom of the support base respectively; a liquid metal cavity is formed in the interior of the end of the leveling leg away from the support base, and a liquid metal distribution change detection sensor is arranged in the interior of the liquid metal cavity; a piezoelectric ceramic fine adjuster is arranged at the end of the end of the leveling leg away from the support base, and the piezoelectric ceramic fine adjuster is electrically connected with the liquid metal distribution change detection sensor; the piezoelectric ceramic fine adjuster is configured to adjust the support height of the leveling leg according to the liquid metal distribution data collected by the liquid metal distribution change detection sensor, so as to calibrate the upper surface of the support base to a horizontal state.

[0012] Optionally, the magnetic suspension assembly comprises an electromagnetic array module and a suspension platform; the electromagnetic array module is arranged on the upper surface of the support base; the suspension platform is arranged on the side of the electromagnetic array module away from the support base; the magnetic field strength of the electromagnetic array module can form a gradient magnetic field of 0.8 to 1.2 T on the lower surface of the suspension platform; the suspension platform is configured to carry a circuit board to be detected and can realize suspension under the action of the electromagnetic force of the electromagnetic array module.

[0013] Optionally, the suspension platform is made of aluminum alloy, and the lower surface of the suspension platform is embedded with a soft magnetic alloy.

[0014] Optionally, a heat conduction layer is deposited on the upper surface of the suspension platform; the thickness of the heat conduction layer is 45 to 55 μm; and the thermal conductivity of the heat conduction layer is not less than 1500 W / (m·K).

[0015] Optionally, the magnetic suspension assembly further comprises a plurality of buffer springs and a plurality of buffer contacts; the plurality of buffer springs are arranged along the circumference of the electromagnetic array module and connected with the upper surface of the support base at one end; the plurality of buffer contacts are arranged between the buffer springs and the suspension platform and connected with the plurality of buffer springs one by one, wherein one end of the buffer contact is connected with the end of the corresponding buffer spring away from the support base, and the other end is connected with the lower surface of the suspension platform.

[0016] Optionally, the visual detection assembly comprises a fixing part, a driving part and a detection part; the fixing part is arranged on the support base; the driving part is arranged on the top of the fixing part, the driving end of the driving part penetrates through the fixing part, and a connecting flange is arranged on the protruding part of the driving end, the connecting flange being used for connecting the detection part; the detection end of the detection part is arranged towards the circuit board to be detected.

[0017] Optionally, the detection device for the circuit board of the mine equipment further comprises:

[0018] A dust isolation assembly;

[0019] The dust isolation assembly comprises a gas conveying device, a gas conveying pipe and an annular air duct; the gas conveying device is arranged on the support base; the gas outlet end of the gas conveying device is in communication with the gas conveying pipe; the end of the gas conveying pipe away from the gas conveying device is in communication with the annular air duct; the annular air duct is arranged on the side of the magnetic levitation assembly away from the support base, and the magnetic levitation assembly is located in the projection range of the annular air duct on the support base; the bottom of the annular air duct is provided with a plurality of air outlet heads; the plurality of air outlet heads are arranged towards the vertical direction, and are in communication with the annular air duct and uniformly arranged along the circumferential direction of the annular air duct.

[0020] Optionally, the dust isolation assembly further comprises a filter screen cover and an electrostatic adsorption filter screen; the filter screen cover is arranged at the air inlet end of the gas conveying device, and a magnetic adsorption filter unit is arranged in the filter screen cover; the electrostatic adsorption filter screen is horizontally arranged in the annular air duct; the electrostatic adsorption filter screen has a ring structure, and is continuously arranged along the circumferential direction of the annular air duct.

[0021] Optionally, the air outlet head has a reduced diameter structure, and the cross-sectional area of the air outlet head gradually decreases in the vertical direction.

[0022] By means of the above technical solution, the present application has at least the following beneficial effects:

[0023] The detection device for the circuit board of the mine equipment provided in the present application can collect vibration data of the support base in the X-axis direction, the Y-axis direction and the Z-axis direction in real time by arranging at least three vibration sensors, and the controller can dynamically adjust the levitation state of the magnetic levitation assembly, so as to actively offset the influence of vibration on the circuit board to be detected carried, to keep the circuit board to be detected stable relative to the visual detection assembly, to ensure that the visual detection assembly can obtain clear and stable images, to fundamentally reduce the detection error caused by vibration, and to reduce the risk of misjudgment or omission. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 A front view of the detection device for the circuit board of the mine equipment according to an optional embodiment of the present application;

[0025] Figure 2 A side view of a detection device for a mine equipment circuit board according to an optional embodiment of the present application;

[0026] Figure 3 A structural schematic view of a visual detection assembly according to an optional embodiment of the present application;

[0027] Figure 4 A structural schematic view of a leveling leg according to an optional embodiment of the present application; Figure 3

[0028] Figure 5 A structural schematic view of a dust isolation assembly according to an optional embodiment of the present application;

[0029] Figure 6 A structural schematic view of a dust isolation assembly according to an optional embodiment of the present application; Figure 5

[0030] A structural schematic view of a dust isolation assembly according to an optional embodiment of the present application; Figure 7

[0031] Figure 8 A structural schematic view of a dust isolation assembly according to an optional embodiment of the present application; Figure 7 A partial enlarged view at C in FIG. 1.

[0032] The reference signs are represented as:

[0033] 1, support base; 11, leveling leg; 111, liquid metal cavity; 12, piezoelectric ceramic fine adjuster; 2, magnetic suspension assembly; 21, electromagnetic array module; 22, suspension platform; 221, heat conduction layer; 23, buffer spring; 24, buffer contact; 3, visual detection assembly; 31, fixed part; 32, driving part; 33, detection part; 34, connecting flange; 4, controller; 5, dust isolation assembly; 51, gas conveying device; 52, gas conveying pipe; 53, annular air duct; 54, air outlet head; 55, filter screen cover; 56, electrostatic adsorption filter screen. DETAILED DESCRIPTION

[0034] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0035] ​​In addition, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eight" are used only for descriptive purpose and are not to be construed as indicating or implying relative importance or a specific number of the indicated technical features. Thus, features defined with "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eight" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0036] In the present application, unless otherwise explicitly and specifically defined, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] The preferred embodiments of the present application are described below in conjunction with the accompanying drawings, it should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0038] In conjunction with Figures 1 to 8 As shown in the drawings, according to the embodiments of the present application, a detection device for circuit board of mine equipment is provided, which is used for carrying out detection work on the circuit board of mine equipment in situ of the mine equipment. The detection device for circuit board of mine equipment comprises a support base 1, a magnetic suspension assembly 2, a visual detection assembly 3 and a controller 4. The support base 1 is internally provided with at least three vibration sensors, which are respectively used for collecting vibration data of the support base 1 in X-axis direction, Y-axis direction and Z-axis direction in real time. The magnetic suspension assembly 2 is arranged on the upper surface of the support base 1, and is used for carrying the circuit board to be detected. The detection end of the visual detection assembly 3 is arranged on the side of the magnetic suspension assembly 2 away from the support base 1, and is arranged towards the circuit board to be detected, and is used for visually detecting the circuit board to be detected. The controller 4 is arranged on the support base 1, and is electrically connected with the magnetic suspension assembly 2 and the at least three vibration sensors respectively. The controller 4 is used for controlling the suspension state of the magnetic suspension assembly 2 according to the vibration data collected by the at least three vibration sensors, so as to offset the influence of vibration on detection.

[0039] The detection device for the circuit board of the mining equipment provided in the embodiments of the present application is used for detecting the circuit board removed from the mining equipment in the original environment of the mining equipment, i.e., the field where the mining equipment is originally installed and operated, rather than in a stable environment such as a laboratory. It should be noted that, due to the continuous vibration in the mining field, such as equipment operation and mechanical operation, the traditional detection device for the circuit board of the mining equipment is prone to image blurring and detection errors due to vibration. The detection device for the circuit board of the mining equipment provided in the embodiments can collect vibration data of the support base 1 in the X-axis direction, the Y-axis direction and the Z-axis direction in real time through the arrangement of at least three vibration sensors, and the controller 4 dynamically adjusts the suspension state of the magnetic suspension assembly 2 accordingly, so as to actively offset the influence of vibration on the circuit board to be detected carried by the support base 1, so that the circuit board to be detected remains stable relative to the visual detection assembly 3, ensures that the visual detection assembly 3 obtains clear and stable images, fundamentally reduces the detection errors caused by vibration, and reduces the risk of misjudgment or omission. Here, the specific operation process is as follows: first, the circuit board to be detected is removed from the mining equipment, and then the removed circuit board to be detected is directly placed on the detection device for the circuit board of the mining equipment in the field of the mining equipment, and the detection work is carried out in the original environment.

[0040] The support base 1 can serve as the basic structure of the detection device for the circuit board of the mining equipment, and carry all other components.

[0041] Specifically, the support base 1 is internally provided with at least three vibration sensors, which are respectively responsible for collecting real-time vibration data in the X-axis, Y-axis and Z-axis directions. For example, the at least three vibration sensors include a first vibration sensor, a second vibration sensor and a third vibration sensor, the first vibration sensor is used to collect real-time vibration data in the X-axis direction, the second vibration sensor is used to collect real-time vibration data in the Y-axis direction, and the third vibration sensor is used to collect real-time vibration data in the Z-axis direction. Here, the X-axis direction refers to the horizontal left-right direction, the Y-axis direction refers to the horizontal front-back direction, and the Z-axis direction refers to the vertical up-down direction. It should be noted that the vibration sensor is provided with at least three vibration sensors because each direction requires one vibration sensor, and the number of vibration sensors can be increased to improve data reliability if there is a redundant design.

[0042] The upper surface of the support base 1 is provided with a magnetic suspension assembly 2, which can serve as a platform for carrying the circuit board to be detected, and use magnetic suspension technology to make the circuit board to be detected suspended above the base without direct contact. In the present embodiment, the suspension state of the circuit board to be detected on the magnetic suspension assembly 2, such as position, angle and height, can be dynamically adjusted to offset the vibration received by the support base 1.

[0043] The detection end of the visual detection assembly 3 is located above the magnetic suspension assembly 2, and the lens faces the circuit board to be detected below. In this embodiment, the visual detection assembly 3 can detect the circuit board to be detected by visual means such as a high-definition camera, an image recognition system, etc., for example, to identify whether the solder joints are detached, whether the lines are broken, whether the components are damaged, etc. It can be understood that the detection accuracy of the visual detection assembly 3 depends on the relative stability between the circuit board to be detected. If the circuit board to be detected vibrates, the image captured by the visual detection assembly 3 will be blurred, and the fault cannot be accurately determined.

[0044] The controller 4 is installed on the support base 1, for example, on the upper surface or side surface of the support base 1. In this embodiment, the controller 4 is connected with the vibration sensor and the magnetic suspension assembly 2 through wires to realize a closed loop of data acquisition, analysis and control.

[0045] Specifically, in actual application scenarios, the controller 4 first receives the X-axis, Y-axis and Z-axis vibration data transmitted by the three vibration sensors to master the vibration state of the support base 1 in real time; then calculates the amplitude, direction and frequency of the vibration according to the vibration data to determine how much displacement the circuit board to be detected will generate relative to the visual detection assembly 3 if it vibrates with the support base 1; and finally the controller 4 sends a reverse adjustment instruction to the magnetic suspension assembly 2, for example, if the support base 1 vibrates 1 mm to the left, the magnetic suspension assembly 2 controls the circuit board to be detected to move 1 mm to the right, so that the circuit board to be detected always remains in a stable position relative to the visual detection assembly 3. In this way, the visual detection assembly 3 can shoot images of the circuit board to be detected in a stable state to achieve accurate detection.

[0046] In some possible implemented embodiments of the present application, as shown in Figure 5 and Figure 6 The support base 1 is provided with leveling legs 11 at the four corners of the bottom thereof; a liquid metal cavity 111 is formed in the inside of the end of each leveling leg 11 away from the support base 1, and a liquid metal distribution change detection sensor is arranged in the inside of the liquid metal cavity 111; and a piezoelectric ceramic fine adjuster 12 is arranged at the end of the end of each leveling leg 11 away from the support base 1, and the piezoelectric ceramic fine adjuster 12 is electrically connected with the liquid metal distribution change detection sensor. The piezoelectric ceramic fine adjuster 12 is used to adjust the support height of the leveling leg 11 according to the liquid metal distribution data collected by the liquid metal distribution change detection sensor to calibrate the upper surface of the support base 1 to a horizontal state.

[0047] In this embodiment, the leveling legs 11 monitor the distribution state of the liquid metal in the liquid metal cavity 111 in real time through the liquid metal distribution change detection sensor, indirectly reflecting the tilt direction and angle of the support base 1; and then the piezoelectric ceramic fine adjuster 12 realizes micron-level or even nanometer-level expansion and contraction adjustment through the piezoelectric effect, accurately adjusts the height of each leveling leg 11, and finally calibrates the upper surface of the support base 1 to a horizontal state. Thus, a stable reference platform is provided for subsequent vibration cancellation of the magnetic suspension assembly 2 and accurate imaging of the visual detection assembly 3, avoiding systematic detection errors caused by the tilt of the support base 1. That is, the detection device for mine equipment circuit boards can flexibly adapt to the complex ground environment of the mine site, without the need to additionally build a flat detection platform, and can be quickly deployed and leveled in situ, significantly improving the practicality and convenience of the detection device for mine equipment circuit boards in the mine scene.

[0048] In this embodiment, by adjusting the height difference of the four leveling legs 11, the unevenness of the mine site ground can be offset, and finally the upper surface of the support base 1 is in a horizontal state, providing a basis for subsequent stable operation of the magnetic suspension assembly 2 and accurate imaging of the visual detection.

[0049] Specifically, the lower end of each leveling leg 11 is internally provided with a closed cavity, i.e., a liquid metal cavity 111. The liquid metal cavity 111 contains liquid metal, which can be gallium-indium alloy or other metals that are liquid at room temperature. At the same time, the liquid metal cavity 111 is provided with a liquid metal distribution change detection sensor. The liquid metal distribution change detection sensor can be understood as a plurality of electrodes or sensing elements distributed at different positions in the liquid metal cavity 111. When the support base 1 tilts due to uneven ground, the liquid metal will flow to the low place in the liquid metal cavity 111 due to gravity, causing the coverage of the liquid metal at different positions in the liquid metal cavity 111 to change. For example, when the support base 1 tilts to the left, the liquid metal in the liquid metal cavity 111 will gather more on the left side of the liquid metal cavity 111. At this time, the liquid metal distribution change detection sensor can accurately determine the tilt direction and angle of the position of the leveling leg 11 by detecting such distribution changes, such as the conduction state of different electrodes, resistance changes, etc., and then indirectly reflects the tilt state of the entire support base 1.

[0050] Further, the end of each leveling leg 11 in contact with the ground is mounted with a piezoelectric ceramic fine adjuster 12. Piezoelectric ceramic is a material that produces a small expansion and contraction when electrified, and the amount of deformation is proportional to the voltage, which can achieve micron-level or even nanometer-level precise control. Here, the piezoelectric ceramic fine adjuster 12 is electrically connected with the liquid metal distribution sensor, and can receive the inclination data transmitted by the sensor. For example, if the liquid metal distribution sensor detects that the support base 1 is inclined to the left, the controller 4 will control the piezoelectric ceramic material of the two leveling legs 11 on the left to elongate, or the piezoelectric ceramic material of the two leveling legs 11 on the right to shorten, and gradually level the support base 1 by fine-tuning the height difference of the four legs. It should be noted that the whole process is a dynamic feedback, the liquid metal distribution sensor detects the inclination state in real time, and the piezoelectric ceramic fine adjuster 12 continuously adjusts until the liquid metal is evenly distributed in the liquid metal cavity 111, indicating that the support base 1 is horizontal. In this embodiment, the piezoelectric ceramic fine adjuster 12 mounted on the four leveling legs 11 at the four corners of the support base is suitable for automatically leveling the support base 1 within a range of ±5° inclination of the mine bottom surface.

[0051] In some possible implementation embodiments disclosed in the present application, referring to Figures 1 to 4 As shown in the figure, the magnetic suspension assembly 2 includes an electromagnetic array module 21 and a suspension platform 22, the electromagnetic array module 21 is arranged on the upper surface of the support base 1, and the suspension platform 22 is arranged on the side of the electromagnetic array module 21 away from the support base 1. The magnetic field strength of the electromagnetic array module 21 can form a gradient magnetic field of 0.8 to 1.2T on the lower surface of the suspension platform 22, the suspension platform 22 is used to carry the circuit board to be tested, and can realize suspension under the action of the electromagnetic force of the electromagnetic array module 21.

[0052] In this embodiment, the electromagnetic array module 21 is arranged to make the suspension platform 22 have no physical contact with the support base 1, avoiding the problem that the vibration is directly transmitted to the circuit board to be tested through rigid connection in the traditional mechanical bearing mode, and structurally isolating part of the foundation vibration, thereby improving the starting point of anti-interference. At the same time, the gradient magnetic field of 0.8 to 1.2T formed by the electromagnetic array module 21 on the lower surface of the suspension platform 22 provides sufficient and controllable electromagnetic force for the suspension platform 22, which can stably carry the circuit board to be tested, and ensure that the circuit board to be tested will not fall due to gravity or slight external force, and can also realize fine adjustment of the suspension state, such as real-time correction of position, angle and height, thereby laying a force control foundation for offsetting vibration.

[0053] The electromagnetic array module 21 can be composed of a plurality of electromagnetic units arranged in a Halbach manner. By controlling the current of each electromagnetic unit, the electromagnetic array module 21 can form a gradient magnetic field with a strength of 0.8 to 1.2 T on the lower surface of the suspension platform 22. It should be noted that the gradient magnetic field refers to a magnetic field whose strength changes with the spatial position, showing a non-uniformly distributed magnetic field form.

[0054] Specifically, in the embodiment, the specific structure of the electromagnetic array module 21 is that 36 electromagnetic units are combined in a honeycomb arrangement, each of which contains two core components: a permanent magnet and a copper winding coil.

[0055] The suspension platform 22 is located above the electromagnetic array module 21. The suspension platform 22 is a component that directly carries the circuit board to be tested, and its material or structural design enables it to interact with the magnetic field generated by the electromagnetic array module 21, for example, the suspension platform 22 can contain a permanent magnet or a magnetic conductive material. Thus, under the action of the gradient magnetic field generated by the electromagnetic array module 21, the suspension platform 22 will be subjected to an upward electromagnetic force, and when this force and the gravity of the suspension platform 22 and the circuit board to be tested reach a balance, the suspension platform 22 and the circuit board to be tested will achieve a suspended state.

[0056] Specifically, in the vertical direction, the electromagnetic array module 21 and the suspension platform 22 are oppositely arranged, which makes the suspension platform 22 in a non-contact suspended state, and this state is controllable. Thus, on the one hand, since there is no physical contact between the electromagnetic array module 21 and the suspension platform 22, vibration can be prevented from being transmitted to the suspension platform 22 through rigid connection, thereby reducing vibration interference from the structure; on the other hand, the controller 4 can dynamically adjust the magnetic field distribution of the electromagnetic array module 21 according to the vibration data collected by the vibration sensor, and then change the size and direction of the electromagnetic force acting on the suspension platform 22 in real time, so as to accurately adjust the position and angle of the suspension platform 22, thereby actively offsetting the vibration influence and providing a stable detection object for the vision detection assembly 3. In actual application scenarios, when the vibration sensor on the support base 1 collects the vibration signal from the mine equipment, the electromagnetic array module 21 will perform reverse excitation according to the vibration phase. For example, when detecting the vibration in the vertical upward direction, the electromagnetic array module 21 located on the upper surface of the support base 1 will enhance the magnetic field to generate a downward attractive force on the suspension platform 22, so as to offset its upward displacement and ensure the stability of the suspension platform 22.

[0057] In the above embodiment, the suspension platform 22 is made of aluminum alloy, and the lower surface of the suspension platform 22 is embedded with soft magnetic alloy.

[0058] Here, the suspension platform 22 is made of aluminum alloy, which can reduce the mass of the suspension platform 22 itself, so that the electromagnetic array module 21 does not need to provide excessive electromagnetic force to realize the stable suspension of the suspension platform 22, reduces the requirement for the output power of the electromagnetic array module 21, and reduces the energy consumption. At the same time, the aluminum alloy has good mechanical strength and rigidity, can stably bear the circuit board to be detected, and ensures that the position stability of the circuit board to be detected will not be affected by the deformation of the circuit board to be detected in the suspended state, thereby providing a reliable bearing basis for detection.

[0059] Further, the soft magnetic alloy has the characteristics of high magnetic permeability and low coercivity, and is sensitive to the magnetic field. Embedding the soft magnetic alloy on the lower surface of the suspension platform 22 can enhance the interaction between the suspension platform 22 and the gradient magnetic field generated by the electromagnetic array module 21, so that the suspension platform 22 can more accurately respond to the change of the magnetic field of the electromagnetic array module 21, and improve the sensitivity and accuracy of the suspension state adjustment. For example, when the controller 4 needs to fine-tune the position of the suspension platform 22 to offset the vibration, the presence of the soft magnetic alloy can make the suspension platform 22 move more quickly and accurately in response to the change of the magnetic field, and ensure that the circuit board to be detected remains stable relative to the visual detection assembly 3. In this embodiment, the response time of the controller 4 is not more than 0.5s.

[0060] In some possible implementation examples of the present application, as shown in Figure 4 The upper surface of the suspension platform 22 is deposited with a heat-conducting layer 221, the thickness of the heat-conducting layer 221 is 45-55μm, and the thermal conductivity of the heat-conducting layer 221 is not less than 1500W / (m·K).

[0061] In this embodiment, the heat-conducting layer can quickly conduct the heat generated from the circuit board to be detected during the detection process, such as power-on test and signal transmission, to the suspension platform 22, so as to avoid the performance drift of the components caused by high temperature of the circuit board to be detected, thereby reducing the detection error.

[0062] The heat-conducting layer 221 can be a graphene heat-conducting layer 221, which can be prepared by a chemical vapor deposition process, and the thickness thereof is preferably 50μm.

[0063] In some possible implementation examples of the present application, as shown in Figures 1 to 4 The magnetic suspension assembly 2 further comprises a plurality of buffer springs 23 and a plurality of buffer contacts 24. The plurality of buffer springs 23 are arranged in a circumferential direction of the electromagnetic array module 21, and one end of each buffer spring 23 is connected to the upper surface of the support base 1. The plurality of buffer contacts 24 are arranged between the buffer springs 23 and the suspension platform 22, and are connected to the buffer springs 23 one by one. One end of each buffer contact 24 is connected to the end of the corresponding buffer spring 23 away from the support base 1, and the other end of the buffer contact 24 is connected to the lower surface of the suspension platform 22.

[0064] In this embodiment, the buffer spring 23 and the buffer contact 24 are arranged around the electromagnetic array module 21 in a circumferential manner, which can form a mechanical limiting structure for the suspended platform 22, preventing the suspended platform 22 from falling and rigidly colliding with the support base 1 or the electromagnetic array module 21 during power failure, thereby protecting the circuit board under test, the suspended platform 22 and the electromagnetic array module 21 from mechanical damage.

[0065] Among them, the buffer spring 23 can be a shape memory alloy spring, which has excellent elastic deformation capability and can effectively absorb external impact force; especially in the event of a sudden power failure of the detection device for the circuit board of mining equipment, the shape memory alloy spring can support and protect the suspended platform 22 through its own elastic buffering effect, preventing the suspended platform 22 from falling due to loss of electromagnetic force, thereby preventing it from rigidly colliding with the support base 1 or the electromagnetic array module 21.

[0066] Specifically, multiple buffer springs 23 are provided, and the multiple buffer springs 23 are evenly distributed around the core electromagnetic device of magnetic levitation. One end of the multiple buffer springs 23 is connected to the end of the buffer spring 23 away from the support base 1, and the other end is directly or indirectly connected to the lower surface of the suspension platform 22.

[0067] In this embodiment, the buffer spring 23 is indirectly connected to the lower surface of the suspension platform 22.

[0068] Specifically, a buffer contact 24 is provided between the buffer spring 23 and the suspension platform 22. The buffer contact 24 can be a tungsten alloy contact. In practical applications, multiple buffer contacts 24 are provided, and multiple buffer contacts 24 are provided in a one-to-one correspondence with multiple buffer springs 23. That is, each buffer spring 23 is equipped with a buffer contact 24 above it, and the buffer spring 23 is connected to the lower surface of the suspension platform 22 through the buffer contact 24.

[0069] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 3 As shown, the visual inspection component 3 includes a fixing part 31, a driving part 32, and a detection part 33; the fixing part 31 is disposed on the support base 1; the driving part 32 is disposed on the top of the fixing part 31, the driving end of the driving part 32 passes through the fixing part 31, and a connecting flange 34 is provided on the protruding part of the driving end, which is used to connect the detection part 33; the detection end of the detection part 33 is positioned facing the circuit board under test.

[0070] In this embodiment, the fixed part 31 is directly arranged on the support base 1, providing a stable basic support for the entire visual detection assembly 3, reducing detection errors caused by vibration or displacement during detection, and ensuring the positional accuracy of the detection part 33. At the same time, by arranging the driving part 32, the detection part 33 can be driven to rise and fall, achieving the purpose of adjusting the distance between the detection part 33 and the circuit board to be detected.

[0071] The fixed part 31 can be a fixed frame. One end of the fixed frame is fixedly connected to the side surface of the support base 1 by means of bolts or the like, and the other end is first extended away from the direction perpendicular to the upper surface of the support base 1, and then bent towards the horizontal direction parallel to the upper surface of the support base 1, forming a horizontal support section capable of carrying the driving part 32. It should be noted that the projection of the center point of the suspension platform 22 on the upper surface of the support base 1 is within the projection range of the horizontal support section on the upper surface of the support base 1, which can ensure that the detection end of the detection part 33 can always accurately cover the detection area of the circuit board to be detected on the suspension platform 22 when the detection part 33 is moved by the driving part 32, avoiding missed detection due to positional deviation.

[0072] The driving part 32 can be a hydraulic push rod. The hydraulic push rod is installed on the upper surface of the horizontal support section, and the driving end of the hydraulic support rod, i.e. the piston rod, penetrates the fixed frame, and the protruding part is provided with a connecting flange 34. The detection part 33 is detachably installed on the piston rod of the hydraulic push rod through the connecting flange 34.

[0073] The detection part 33 can be a CCD visual detection machine. In actual application scenarios, by starting the hydraulic push rod fixed on the fixed frame, the driving end of the hydraulic push rod will drive the connecting flange 34 to move, and then the CCD visual detection machine will be driven to move synchronously by the connecting flange 34, until the CCD visual detection machine is adjusted to a height suitable for detecting the circuit board to be detected. Therefore, the distance between the CCD visual detection machine and the circuit board to be detected can be conveniently adjusted to ensure that it is in the best detection position, thereby facilitating efficient and accurate visual detection of the circuit board to be detected.

[0074] In some possible implementation embodiments of the present application, see Figure 1 , Figure 2 and Figure 7As shown, the mine equipment circuit board detection device further comprises a dust isolation assembly 5; the dust isolation assembly 5 comprises a gas conveying device 51, a gas conveying pipe 52 and a ring-shaped air duct 53, the gas conveying device 51 is arranged on the support base 1, the gas outlet end of the gas conveying device 51 is in communication with the gas conveying pipe 52, one end of the gas conveying pipe 52 away from the gas conveying device 51 is in communication with the ring-shaped air duct 53, the ring-shaped air duct 53 is arranged on the side of the magnetic suspension assembly 2 away from the support base 1, and the magnetic suspension assembly 2 is located in the projection range of the ring-shaped air duct 53 on the support base 1; a plurality of air outlet heads 54 are arranged at the bottom of the ring-shaped air duct 53, the plurality of air outlet heads 54 are arranged towards the vertical direction and are in communication with the ring-shaped air duct 53 and are uniformly arranged along the circumference of the ring-shaped air duct 53.

[0075] In this embodiment, the gas conveying device 51 supplies gas to the ring-shaped air duct 53 through the gas conveying pipe 52, and the plurality of air outlet heads 54 at the bottom of the ring-shaped air duct 53 uniformly spray gas flow along the circumference, forming a gas flow barrier surrounding the magnetic suspension assembly 2. The gas flow barrier can block dust, impurities and the like in the external environment from entering the area where the magnetic suspension assembly 2 is located or the detection area of the circuit board to be detected, thereby reducing the equipment wear, detection accuracy decline or failure risk caused by dust.

[0076] Among them, the gas conveying device 51 can be a high-pressure gas pump. The high-pressure gas pump is fixedly arranged on one side of the support base 1 to provide a stable mounting basis for the entire dust isolation assembly 5. It should be noted that if the controller 4 and the fixed part 31 are also arranged on the side of the support base 1, the three are arranged on different sides of the support base 1, i.e. the controller 4, the fixed part 31 and the gas conveying device 51 each occupy an independent side of the support base 1, avoiding space conflicts caused by stacking components on the same side, while ensuring that the wiring, operation and heat dissipation of each component do not interfere with each other.

[0077] Among them, the gas conveying pipe 52 is a connecting pipe connecting the gas conveying device 51 and the ring-shaped air duct 53, used for conveying gas from the gas conveying device 51 to the ring-shaped air duct 53. In actual application scenarios, one end of the gas conveying pipe 52 is in communication with the gas outlet end of the gas conveying device 51, and the other end is in communication with the ring-shaped air duct 53, forming a closed gas transmission channel from the gas conveying device 51 to the gas conveying pipe 52 and then to the ring-shaped air duct 53.

[0078] Among them, the ring-shaped air duct 53 is a ring-shaped air duct structure used for distributing the gas conveyed by the gas conveying pipe 52 from the gas conveying device 51. In actual application scenarios, the ring-shaped air duct 53 is installed above the magnetic suspension assembly 2 and surrounds the periphery of the magnetic suspension assembly 2 to surround the magnetic suspension assembly 2 from above or from the side above.

[0079] The plurality of air outlet heads 54 are arranged on one side of the annular air duct 53 close to the magnetic levitation assembly 2, and are ports for gas ejection. The plurality of air outlet heads 54 are all directed towards the magnetic levitation assembly 2 or the circuit board to be detected carried thereby, and are in communication with the inside of the annular air duct 53, and are uniformly arranged along the circumferential direction of the annular air duct 53, so as to ensure that the gas can be uniformly ejected from different positions of the annular air duct 53.

[0080] Specifically, in an actual application scenario, when the gas conveying device 51 is started, the gas enters the annular air duct 53 through the gas conveying pipe 52, and is then vertically ejected downward through the plurality of uniformly distributed air outlet heads 54, so as to form a ring-shaped gas flow barrier surrounding the magnetic levitation assembly 2. Since the magnetic levitation assembly 2 is located in the projection range of the annular air duct 53, the ring-shaped gas flow barrier can effectively block the external dust from entering the magnetic levitation assembly 2 and the circuit board to be detected carried thereby, so as to avoid the dust from adhering to the detection part 33 or the surface of the object to be detected, and ensure the detection accuracy.

[0081] In some possible implemented embodiments of the present disclosure, referring to FIGS. 1 and 2, the dust isolation assembly 5 further comprises a filter cover 55 and an electrostatic adsorption filter screen 56. Figure 7 and Figure 8 The filter cover 55 is arranged at the gas inlet end of the gas conveying device 51, and the filter cover 55 is internally provided with a magnetic adsorption filter unit. The electrostatic adsorption filter screen 56 is horizontally arranged in the annular air duct 53, and the electrostatic adsorption filter screen 56 has a ring-shaped structure and is continuously arranged along the circumferential direction of the annular air duct 53.

[0082] In this embodiment, the filter cover 55 performs preliminary filtration on the large-particle impurities and magnetic dust at the gas inlet end, and the electrostatic adsorption filter screen 56 performs secondary fine filtration on the gas entering the annular air duct 53, so as to intercept the small non-magnetic impurities. The cooperation of the two can make the ejected gas flow barrier not only have the function of isolating the external dust, but also avoid that the gas conveyed by itself carries the impurities to pollute the detection area, so as to further improve the applicability of the dust isolation assembly 5 in the high-dust environment such as a mine, and protect the cleanliness of the circuit board to be detected and the visual detection assembly 3.

[0083] The magnetic adsorption filter unit can be a columnar magnet. The columnar magnet can adsorb the ferromagnetic dust in the air, such as metal scraps and iron powder commonly seen in a mine environment, through magnetic adsorption.

[0084] Specifically, the filter screen 55 is installed at the air inlet of the gas delivery device 51, that is, at the entrance where gas enters the gas delivery device 51. When the gas delivery device 51 draws in air, the outside air first passes through the filter screen 55, where the magnetic filtration unit adsorbs magnetic impurities. At the same time, the mesh structure of the filter screen 55 itself can intercept larger dust particles, such as dust and sand. This achieves gas source pretreatment, preventing impurities from being carried in the gas drawn in by the gas delivery device 51, and preventing impurities from entering subsequent pipelines or contaminating the detection area after being ejected with the airflow.

[0085] The electrostatic adsorption filter 56 has a ring structure and is continuously arranged along the circumferential direction of the ring air duct 53. That is, the shape of the electrostatic adsorption filter 56 matches that of the ring air duct 53, and it can completely cover the airflow channel inside the ring air duct 53, ensuring that all gas passing through the ring air duct 53 must pass through the electrostatic adsorption filter 56.

[0086] Specifically, the electrostatic adsorption filter 56 is horizontally positioned within the cavity of the annular air duct 53, adsorbing fine dust particles, such as small dust and smoke particles, from the gas through electrostatic effects. In practical applications, the gas transported by the gas delivery device 51 passes through the electrostatic adsorption filter 56 after entering the annular air duct 53. Fine impurities not intercepted by the filter screen 55 are electrostatically adsorbed, resulting in cleaner gas being ejected from the outlet 54.

[0087] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 8 As shown, the air outlet 54 has a reduced diameter structure, and the cross-sectional area of ​​the air outlet 54 gradually decreases in the vertical direction.

[0088] In this embodiment, by setting the exhaust head 54 to a narrow diameter structure, the gas velocity increases during ejection due to the reduced channel cross-section. According to Bernoulli's principle in fluid mechanics, the increased velocity is accompanied by an increase in dynamic pressure, thereby enhancing the jet pressure of the exhaust head 54. This creates a stronger and more concentrated airflow barrier, effectively resisting the intrusion of external dust and ensuring a more reliable isolation effect for the magnetic levitation component 2 and the detection area.

[0089] In this embodiment, the air outlet 54 is a tapered Venturi structure.

[0090] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0091] The above merely preferred embodiments of the present application are not used to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application. The above is merely the preferred embodiment of the present application, it should be pointed out that, for the ordinary skilled in the art, without departing from the technical principle of the present application, a number of improvements and variations can be made, these improvements and variations should also be considered as the protection scope of the present application.

Claims

1. A detection device for a mine equipment circuit board, characterized by, A mine equipment circuit board in-situ detection device for detecting a mine equipment circuit board in-situ, the device comprising: a support base, the support base being internally provided with at least three vibration sensors, the at least three vibration sensors being respectively used to collect vibration data of the support base in X-axis direction, Y-axis direction and Z-axis direction in real time; a magnetic levitation assembly, the magnetic levitation assembly being arranged on the upper surface of the support base and used to carry a circuit board to be detected; a visual detection assembly, a detection end of the visual detection assembly being arranged on the side of the magnetic levitation assembly away from the support base and facing the circuit board to be detected, and the visual detection assembly being used to perform visual detection on the circuit board to be detected; a controller, the controller being arranged on the support base and being electrically connected with the magnetic levitation assembly and the at least three vibration sensors, and the controller being used to control the levitation state of the magnetic levitation assembly according to the vibration data collected by the at least three vibration sensors, so as to offset the influence of vibration on detection.

2. The mine equipment circuit board inspection apparatus according to claim 1, characterized by The bottom corners of the support base are respectively provided with leveling legs, the inside of the end of each leveling leg away from the support base is provided with a liquid metal cavity, the inside of the liquid metal cavity is provided with a liquid metal distribution change detection sensor, and the end of each leveling leg away from the support base is provided with a piezoelectric ceramic fine adjuster, the piezoelectric ceramic fine adjuster is electrically connected with the liquid metal distribution change detection sensor, and the piezoelectric ceramic fine adjuster is used to adjust the support height of the leveling leg according to the liquid metal distribution data collected by the liquid metal distribution change detection sensor, so as to calibrate the upper surface of the support base to a horizontal state.

3. The mine equipment circuit board inspection apparatus according to claim 1, characterized by The magnetic levitation assembly comprises an electromagnetic array module and a levitation platform, the electromagnetic array module is arranged on the upper surface of the support base, the levitation platform is arranged on the side of the electromagnetic array module away from the support base, the magnetic field strength of the electromagnetic array module can form a gradient magnetic field of 0.8 to 1.2 T on the lower surface of the levitation platform, the levitation platform is used to carry the circuit board to be detected and can realize levitation under the action of the electromagnetic force of the electromagnetic array module.

4. The mine equipment circuit board detection device according to claim 3, characterized by The levitation platform is made of aluminum alloy, and the lower surface of the levitation platform is embedded with soft magnetic alloy.

5. The mine equipment circuit board detection apparatus according to claim 3, characterized by The upper surface of the levitation platform is deposited with a heat conduction layer, the thickness of the heat conduction layer is 45 to 55 μm, and the thermal conductivity of the heat conduction layer is not less than 1500 W / (m·K).

6. The mine equipment circuit board detection apparatus according to claim 3, characterized by The magnetic levitation assembly further comprises a plurality of buffer springs and a plurality of buffer contacts, the plurality of buffer springs are arranged along the circumference of the electromagnetic array module and connected with the upper surface of the support base at one end, the plurality of buffer contacts are arranged between the buffer springs and the levitation platform and connected with the plurality of buffer springs one by one, one end of each buffer contact is connected with the end of the corresponding buffer spring away from the support base, and the other end is connected with the lower surface of the levitation platform.

7. The mine equipment circuit board detection apparatus according to claim 1, characterized by The visual detection assembly comprises a fixing part, a driving part and a detection part; the fixing part is arranged on the support base; the driving part is arranged on the top of the fixing part, the driving end of the driving part penetrates through the fixing part, the protruding part of the driving end is provided with a connecting flange, and the connecting flange is used for connecting the detection part; the detection end of the detection part is arranged towards the circuit board to be detected.

8. The mine equipment circuit board detection apparatus according to claim 1, characterized by, Further comprising: A dust isolation assembly; The dust isolation assembly comprises a gas conveying device, a gas conveying pipe and an annular air duct, the gas conveying device is arranged on the support base, the gas outlet end of the gas conveying device is in communication with the gas conveying pipe, the end of the gas conveying pipe away from the gas conveying device is in communication with the annular air duct, the annular air duct is arranged on the side of the magnetic suspension assembly away from the support base, and the magnetic suspension assembly is located in the projection range of the annular air duct on the support base; the bottom of the annular air duct is provided with a plurality of air outlet heads, the plurality of air outlet heads are arranged towards the vertical direction, are in communication with the annular air duct and are uniformly arranged along the circumferential direction of the annular air duct.

9. The mine equipment circuit board detection apparatus according to claim 8, characterized by, The dust isolation assembly further comprises a filter screen cover and an electrostatic adsorption filter screen; the filter screen cover is arranged at the air inlet end of the gas conveying device, and the filter screen cover is internally provided with a magnetic adsorption filter unit; the electrostatic adsorption filter screen is horizontally arranged in the annular air duct, the electrostatic adsorption filter screen has an annular structure and is continuously arranged along the circumferential direction of the annular air duct.

10. The mine equipment circuit board detection apparatus of claim 8, wherein The air outlet head has a reduced diameter structure, and the cross-sectional area of the air outlet head gradually decreases in the vertical direction.

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