A camera for industrial intelligent vision acquisition

Abstract

The present invention belongs to the technical field of cameras, and in particular, to a camera for industrial intelligent vision acquisition. The following scheme is now proposed, which includes a camera body. An installation frame is fixed to the top end of the camera body. A rotating tube is rotatably provided on one side of the installation frame. Two vertically arranged air pipes are communicated with the bottom end of the rotating tube. Both ends of the air pipes are open. An air extraction pipe is communicated with the top end of the rotating tube. The rotating tube is drivingly connected to a motor. The present invention performs dust suction on the surface of the lens through the pipe orifice at the top end of the air pipe, and absorbs the floating dust in the lower position area through the pipe orifice at the bottom end of the air pipe, thereby improving the cleanliness of the area between the lens and the workpiece during the shooting operation, and thus ensuring the accuracy and effectiveness of visual acquisition of the workpiece at each fixed-point interval.

Description

Technical Field

[0001] The present invention relates to the technical field of cameras, and particularly relates to a camera for industrial intelligent vision acquisition. Background Art

[0002] The camera for industrial vision acquisition is a key component of an industrial vision system. It converts an optical image into an electrical signal, and then through digital processing, transmits the image data to a computer or other image processing devices for analysis and processing. Usually, visual acquisition is often performed on continuously spaced workpieces to judge product quality.

[0003] Referring to the Chinese patent with the patent announcement number CN214675324U, a camera for industrial intelligent vision acquisition is disclosed, including a camera main body. A lens is integrally formed on the camera main body, and a fixing ring is integrally formed at the side position of the lens on the camera main body. Connection slots are symmetrically arranged in the fixing ring, and positioning circular grooves are arranged on the inner side walls of the connection slots.

[0004] However, in the application environment of actual visual acquisition cameras in industrial production, due to environmental factors or product itself factors, it is easy to cause floating debris or particles between the product and the camera. Especially during the use process of intermittent shooting and acquisition, long-term use will affect the accuracy of visual acquisition. Summary of the Invention

[0005] Based on the technical problems in the background art, the present invention proposes a camera for industrial intelligent vision acquisition.

[0006] The camera for industrial intelligent vision acquisition proposed by the present invention includes a camera main body. An installation frame is fixed at the top end of the camera main body. A rotating pipe is rotatably arranged on one side of the installation frame. Two vertically arranged air pipes are communicated with the bottom end of the rotating pipe. Both ends of the air pipes are open. An air extraction pipe is communicated with the top end of the rotating pipe. The rotating pipe is drivingly connected with a motor.

[0007] Preferably, a fixing rod is installed at the bottom of the installation frame. The fixing rod is located on the side of the camera main body away from the rotating pipe. Two leaf plates are arranged below the fixing rod. A rotating cylinder is fixed at one end of the leaf plate close to the fixing rod. The inner wall of the rotating cylinder and the outer wall of the fixing rod are rotationally connected through a torsion spring. A limiting block is installed on the fixing rod at the position between the two leaf plates.

[0008] Preferably, the distance between the two leaf plates gradually increases from the fixing rod towards the direction of the camera main body. The leaf plates are sequentially arranged as leaf one, leaf two, and leaf three from the fixing rod towards the direction of the camera main body. Leaf one, leaf two, and leaf three are integrally formed structures. The inclination angle of leaf two is smaller than the inclination angles of leaf one and leaf three. Leaf three is located at the position close to the air pipe.

[0009] Preferably, a light source is installed on the outer wall of the second blade facing the camera body, and a plurality of dust sticking tapes are installed on the outer wall of the first blade facing the camera body.

[0010] Preferably, the bottom end of the rotating pipe is communicated with two horizontally arranged connecting pipes, the two connecting pipes are symmetrically arranged, one side of the air duct is communicated with a horizontally arranged positioning pipe, the positioning pipe and the connecting pipe are rotatably arranged through a bearing, and a plurality of air holes are formed in the outer wall of the air duct.

[0011] Preferably, mounting rods are installed at both ends of the rotating pipe at the bottom of the mounting frame, the two mounting rods are located in the area between the two air ducts, magnets are fixed at the positions of the bottom ends of the mounting rods facing the air ducts, and magnetic attraction sheets are fixed on both sides of the positioning pipe outside the air duct, and the positions of the magnetic attraction sheets correspond to those of the magnets.

[0012] Preferably, a barometric pressure sensor is installed at the bottom end of the connection between the rotating pipe and the connecting pipe, and the barometric pressure sensor is used to monitor the barometric pressure intensity of the air extraction at the bottom end of the rotating pipe; the motor is connected with a current monitoring module, and the power monitoring module is used to monitor the current magnitude and fluctuation of the motor.

[0013] Preferably, a torsion monitoring module is arranged in the rotating cylinder, and the torsion monitoring module is used to monitor the torsion magnitude of the torsion spring.

[0014] Preferably, the monitoring data of the barometric pressure sensor, the current monitoring module and the torsion monitoring module are uploaded to the central processor, and an evaluation coefficient is obtained after comprehensive analysis and calculation. The calculation and judgment logic of the evaluation coefficient is as follows:

[0015] Step 1: The barometric pressure sensor obtains the barometric pressure value monitored in real time , the current monitoring module obtains the current value monitored in real time , and the torsion monitoring module obtains the torsion value monitored in real time ;

[0016] Step 2: Define the barometric pressure deviation rate , the current deviation rate and the torsion deviation rate ;

[0017] , where is the average barometric pressure value under normal conditions;

[0018] , where is the average current value under normal conditions;

[0019] , where is the average torsion value under normal conditions;

[0020] Step 3: Calculate the evaluation coefficient , , where , and are weight coefficients, and ;

[0021] Step 4: Compare the evaluation coefficient with the preset thresholds and , where :

[0022] When , it indicates that the dust density under the lens is within the normal range;

[0023] When , it indicates that the dust density under the lens begins to increase;

[0024] When , it indicates that the dust density under the lens is too high.

[0025] Preferably, in Step 3, , , .

[0026] The beneficial effects of the present invention are as follows:

[0027] In the present invention, the surface of the lens is vacuumed through the nozzle at the top of the air duct, and the floating dust in the lower position area is absorbed through the nozzle at the bottom of the air duct, so as to improve the cleanliness of the area between the lens and the workpiece during the shooting operation, thereby ensuring the accuracy and effectiveness of the visual acquisition of the workpiece at each fixed-point interval.

[0028] In the present invention, the attractive force of the moving air duct cooperates with the torsion spring to make the two vane plates open and close reciprocally. During shooting, the surrounding air flow can be diverted away from the lens through the opening and closing operation, and is blocked by the vane plates with an overall inclined setting at both ends, so as to prevent a large amount of external dust from diffusing under the lens and affecting the accuracy of the visual acquisition of the workpiece.

[0029] In the present invention, by calculating and analyzing the evaluation coefficients of various parameter deviation rates, the current operating state of the equipment can be more accurately reflected, the production process can be adjusted in a timely manner, and the stability and consistency of the product quality can be ensured, thereby further improving the effectiveness and accuracy of the visual acquisition during the long-term working process. Description of the Drawings

[0030] Figure 1 is a schematic structural diagram of the overall state of a camera for industrial intelligent visual acquisition proposed by the present invention;

[0031] Figure 2 This is a schematic diagram of the overall structure of a camera for industrial intelligent vision acquisition proposed by the present invention;

[0032] Figure 3 This is a schematic diagram of the rotating tube structure of a camera for industrial intelligent vision acquisition proposed by the present invention;

[0033] Figure 4 This is a schematic diagram of the structure at the pipe joint position of a camera for industrial intelligent vision acquisition proposed by the present invention;

[0034] Figure 5 This is a schematic diagram of the air duct structure of a camera for industrial intelligent vision acquisition proposed by the present invention;

[0035] Figure 6 This is a sectional view schematic diagram of the connection pipe position of a camera for industrial intelligent vision acquisition proposed by the present invention;

[0036] Figure 7 This is a schematic diagram of the fixed rod structure of a camera for industrial intelligent vision acquisition proposed by the present invention;

[0037] Figure 8 This is a schematic diagram of the vane structure of a camera for industrial intelligent vision acquisition proposed by the present invention;

[0038] Figure 9 This is a schematic diagram of the distribution structure of the air duct and vanes of a camera for industrial intelligent vision acquisition proposed by the present invention.

[0039] In the figure: 1 mounting frame, 2 camera main body, 3 rotating tube, 301 connecting pipe, 4 air duct, 401 positioning pipe, 5 motor, 6 air extraction pipe, 7 pipe joint, 8 first gear, 9 second gear, 10 air holes, 11 fixed rod, 12 vane, 121 first blade, 122 second blade, 123 third blade, 13 rotating cylinder, 14 limiting block, 15 light source, 16 dust sticking tape, 17 mounting rod, 18 magnet, 19 magnetic attracting piece, 20 air pressure sensor. Detailed implementation manners

[0040] Example 1: Refer to Figures 1-9, A camera for industrial intelligent vision acquisition, including a camera body 2. A mounting frame 1 for positioning is fixed at the top of the camera body 2. It should be noted that the lens of the camera body 2 is located at a position far from the mounting frame 1. A rotating tube 3 is rotatably arranged on one side of the mounting frame 1. Two vertically arranged air ducts 4 are connected to the bottom end of the rotating tube 3. Both ends of the air duct 4 are open. A suction pipe 6 is connected to the top end of the rotating tube 3. The top of the outer wall of the rotating tube 3 is drivingly connected to a motor 5. It should be noted that: A pipe joint 7 is fixed at the position of the mounting frame 1 corresponding to the rotating tube 3 at the top. The top end of the outer wall of the rotating tube 3 is rotatably connected to the bottom of the pipe joint 7. The suction pipe 6 is fixed to the top end of the pipe joint 7. One end of the suction pipe 6 far from the pipe joint 7 is connected to an air pump through a hose. A gear one 8 is fixed on the outer wall of the rotating tube 3. A gear two 9 meshing with the gear one 8 is installed on the output shaft of the motor 5; During use, the camera body 2 performs intermittent shooting and acquisition operations. The motor 5 makes the rotating tube 3 drive the two air ducts 4 below to rotate, makes the air ducts 4 rotate in a circle around the vertical axis outside the camera body 2, and makes the air ducts 4 alternately approach or move away from the lens of the camera body 2. When both air ducts 4 are outside the camera body 2, the camera body 2 performs shooting and acquisition operations. When the air ducts 4 rotate to a position close to the lens below the camera body 2, dust suction operations are performed on the surface of the lens through the nozzle at the top end of the air duct 4, and dust floating in the area below is absorbed through the nozzle at the bottom end of the air duct 4, so as to improve the cleanliness of the area between the lens and the workpiece during the shooting operation, thereby ensuring the accuracy and effectiveness of visual acquisition of the workpiece at each fixed-point interval.

[0041] In the present invention, a fixing rod 11 is installed at the bottom of the mounting frame 1. The fixing rod 11 is located on the side of the camera body 2 far from the rotating tube 3. Two leaf plates 12 are arranged below the fixing rod 11. A rotating cylinder 13 is fixed at the end of the leaf plate 12 close to the fixing rod 11. The inner wall of the rotating cylinder 13 and the outer wall of the fixing rod 11 are rotationally connected through a torsion spring. A limiting block 14 is installed at the position of the fixing rod 11 between the two leaf plates 12. The distance between the two leaf plates 12 gradually increases from the fixing rod 11 towards the direction of the camera body 2. The leaf plates 12 are successively arranged as a first blade 121, a second blade 122, and a third blade 123 from the fixing rod 11 towards the camera body 2. The first blade 121, the second blade 122, and the third blade 123 are integrally formed structures. The inclination angle of the second blade 122 is smaller than the inclination angles of the first blade 121 and the third blade 123. The third blade 123 is located at a position close to the air duct 4. It should be noted that: As Figure 1 shown in state one, it is the shooting state. At this time, the two air ducts 4 are at both ends of the rotating tube 3 and far from the lens. The air holes 10 on the air duct 4 are at both sides, and one side of the air holes 10 is exactly facing the third blade 123; As Figure 2The second state shown is the dust suction state. At this time, one of the air ducts 4 is exactly below the lens. The upper and lower ends of the air duct 4 perform dust suction operations, and the air holes 10 on both sides of the air duct 4 suck the surrounding area and attract the position of the second blade 122. Thus, during the rotation of the air duct 4, in addition to directly sucking the shooting area below the lens, the attractive force of the movement of the air duct 4 cooperates with the torsion spring operation to make the two vane plates 12 reciprocally open and close. During shooting, the surrounding air flow can be diverted towards the outside away from the lens through the opening and closing operation, and is blocked by the vane plates 12 with an overall inclined setting at both ends, so as to prevent a large amount of external dust from diffusing below the lens and affecting the accuracy of visual acquisition of the workpiece.

[0042] In the present invention, a light source 15 is installed on the outer wall of the second blade 122 facing the camera body 2 to assist in increasing the environment of the shooting area to avoid the influence of the vane plate's 12 light blocking, thereby ensuring the visual acquisition effect; a plurality of dust sticking tapes 16 are installed on the outer wall of the first blade 121 facing the camera body 2. When dust is introduced into one side of the opening of the two vane plates 12, it will be sucked out by the air duct 4, and when the dust is introduced into the position of the rotating cylinder 13, the dust sticking tapes 16 can adhere to the dust, thereby improving the effectiveness and accuracy during visual acquisition.

[0043] In the present invention, the bottom end of the rotating pipe 3 is connected to two horizontally placed connecting pipes 301, and the two connecting pipes 301 are symmetrically arranged. One side of the air duct 4 is connected to a horizontally arranged positioning pipe 401. The positioning pipe 401 and the connecting pipe 301 are rotatably arranged through a bearing. A plurality of air holes 10 are opened on the outer wall of the air duct 4. During the process of the air duct 4 performing circular rotation along with the rotating pipe 3, external dust and air flow will enter from both ends and the peripheral air holes 10 of the air duct 4. Due to the change of the air flow during the rotation of the air duct 4 and the uneven distribution of the externally floating dust, the air duct 4 will rotate around the positioning pipe 401 while rotating around the rotating pipe 3 along with the rotating pipe 3. Thus, by rotating the air duct 4 below the lens of the camera body 2, the dust suction operation effect on the surrounding environment can be improved, so as to further improve the accuracy of visual acquisition after the air duct 4 moves away.

[0044] At both ends of the rotating tube 3 at the bottom of the mounting frame 1 in the present invention, there are vertically downward extending mounting rods 17. The two mounting rods 17 are located in the area between the two air ducts 4. At the position where the bottom end of the mounting rod 17 faces the air duct 4, there is a magnetic block 18 fixed. On both sides of the positioning tube 401 outside the air duct 4, there are magnetic attraction pieces 19 fixed. The positions of the magnetic attraction pieces 19 correspond to those of the magnetic block 18. When the two air ducts 4 rotate to both ends of the rotating tube 3, the air ducts 4 are at the position closest to the magnetic block 18. Under the action of magnetic attraction, the air ducts 4 are kept vertically placed in this state, so as to increase the attraction of the air holes 10 outside the air ducts 4 to the vane plates 12, so that the two vane plates 12 are closed. When the air ducts 4 are away from the magnetic block 18, the magnetic attraction weakens, and the effectiveness of the rotation of the air ducts 4 around the positioning tube 401 is ensured by the wind force and the uneven distribution of dust.

[0045] Embodiment 2: Refer to Figures 1-9 , a camera for industrial intelligent vision acquisition. On the basis of Embodiment 1, a pressure sensor 20 is installed at the bottom end where the rotating tube 3 and the connecting tube 301 are connected. The pressure sensor 20 is used to monitor the air pressure intensity of the air extraction at the bottom end of the rotating tube 3. When there is too much dust floating in the air cavity around the lower part of the lens, the more concentrated the dust inhaled into the connecting tube 301 and the rotating tube 3, the smaller the air pressure will be; if the air pressure is too small, it may indicate that there is too much dust under the lens, which will affect the shooting accuracy and it is necessary to remind the staff in time;

[0046] The motor 5 is connected with a current monitoring module. The power monitoring module is used to monitor the current magnitude and fluctuation of the motor 5. The motor 5 drives the rotating tube 3 and the air duct 4 to rotate circumferentially. When the dust in the chamber under the lens is too concentrated, it will increase the resistance of the rotation of the air duct 4, thereby increasing the load of the motor 5. Similarly, it will also cause changes in the data monitored by the current monitoring module; when the current value is too large, it may indicate that the external dust is too concentrated, which will affect the visual acquisition effect and it is necessary to remind the staff in time.

[0047] In the present invention, a torsion monitoring module is arranged in the rotating cylinder 13. The torsion monitoring module is used to monitor the torsion of the torsion spring. The attraction force generated during the rotation of the air duct 4 causes the two vane plates 12 to open and close. When the vane plates 12 deflect inward and close, they will squeeze the torsion spring and make the torsion increase. If there is too much dust floating under the lens and the resistance of the vane plates 12 is too large, it will lead to a decrease in the deflection angle compared with the conventional one, that is, the torsion will become smaller; if the torsion is too small, it may indicate that the external dust is too concentrated, which will affect the visual acquisition effect and it is necessary to remind the staff in time.

[0048] In the present invention, the monitoring data of the pressure sensor 20, the current monitoring module and the torsion monitoring module are uploaded to the central processor. After comprehensive analysis and calculation, an evaluation coefficient is obtained. The calculation and judgment logic of the evaluation coefficient is:

[0049] Step 1: The pressure sensor 20 obtains the real-time monitored pressure value , it should be noted that: the pressure value can be the average value during the period when the air duct 4 rotates from directly below the lens to the end position of the rotating pipe 3, and the current monitoring module obtains the real-time monitored current value , it should be noted that: the current value can be the average value during the period when the air duct 4 rotates from directly below the lens to the end position of the rotating pipe 3, and the torque monitoring module obtains the real-time monitored torque value , it should be noted that: the torque value can be the average value or the maximum value during the period when the air duct 4 rotates from directly below the lens to the end position of the rotating pipe 3;

[0050] Step 2: Define the pressure deviation rate , current deviation rate and torque deviation rate ;

[0051] , where is the average pressure value under normal conditions, which can be determined in advance through experiments;

[0052] , where is the average current value under normal conditions, which can be determined in advance through experiments;

[0053] , where is the average torque value under normal conditions, which can be determined in advance through experiments;

[0054] Step 3: Calculate the evaluation coefficient , , where , and are weight coefficients, and ;

[0055] , when is relatively larger than , it indicates that the influence of air pressure change on the overall situation is more significant. At this time, will approach 1; conversely, when is relatively larger than , will approach 0;

[0056] , this formula makes will change dynamically with the size of relative to ; when is larger, will approach 1, indicating that the weight of the current change in the overall evaluation increases; when is large, will approach 0;

[0057] , so that it is possible to more accurately adjust the weight coefficient according to the changes in different monitoring data to comprehensively evaluate the impact of the dust condition under the lens on the visual acquisition effect, so as to improve the accuracy and effectiveness of the evaluation coefficient calculation and judgment;

[0058] Step Four: Compare the evaluation coefficient with the preset thresholds and , where :

[0059] When , the system is in a normal state, indicating that the dust density under the lens is within the normal range and will not have an obvious impact on the visual acquisition effect, and the system can continue to work normally;

[0060] When , the system is in a warning state, indicating that the dust density under the lens begins to increase and may have a certain impact on the visual acquisition effect. At this time, the system should issue a warning signal to remind the staff to pay attention to the dust situation;

[0061] When , the system is in an abnormal state, indicating that the dust density under the lens is too high, which will seriously affect the accuracy and effectiveness of visual acquisition. The system should immediately stop the visual acquisition operation and issue an alarm signal;

[0062] By calculating and analyzing the evaluation coefficients of these parameter deviation rates, it can more accurately reflect the current operating state of the equipment, and can timely adjust the production process to ensure the stability and consistency of product quality, thereby further improving the effectiveness and accuracy of visual acquisition during long-term operation.

[0063] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A camera for industrial intelligent vision acquisition, comprising a camera body (2), and a mounting bracket (1) is fixed to the top of the camera body (2), characterized in that, One side of the mounting frame (1) is rotatably provided with a rotating pipe (3). The bottom end of the rotating pipe (3) is communicated with two vertically arranged air pipes (4). Both ends of the air pipe (4) are open. The top end of the rotating pipe (3) is communicated with an air suction pipe (6). The rotating pipe (3) is drivingly connected with a motor (5). The bottom of the mounting frame (1) is provided with a fixed rod (11). The fixed rod (11) is located on the side of the camera body (2) away from the rotating pipe (3). Two blade plates (12) are arranged below the fixed rod (11). One end of the blade plate (12) close to the fixed rod (11) is fixed with a rotating cylinder (13). The inner wall of the rotating cylinder (13) and the outer wall of the fixed rod (11) are rotationally connected through a torsion spring. A limiting block (14) is installed on the fixed rod (11) at the position between the two blade plates (12). The distance between the two blade plates (12) gradually increases from the fixed rod (11) towards the direction of the camera body (2). The blade plates (12) are successively arranged as blade one (121), blade two (122) and blade three (123) from the fixed rod (11) towards the direction of the camera body (2). The blade one (121), the blade two (122) and the blade three (123) are of an integrally formed structure. The inclination angle of the blade two (122) is smaller than the inclination angles of the blade one (121) and the blade three (123). The blade three (123) is located at the position close to the air pipe (4).

2. The camera for industrial intelligent vision acquisition according to claim 1, characterized in that, A light source (15) is installed on the outer wall of the blade two (122) facing the camera body (2). A plurality of dust sticking tapes (16) are installed on the outer wall of the blade one (121) facing the camera body (2).

3. A camera for industrial intelligent vision acquisition according to any one of claims 1 to 2, characterized in that, The bottom end of the rotating pipe (3) is communicated with two horizontally placed connecting pipes (301). The two connecting pipes (301) are symmetrically arranged. One side of the air pipe (4) is communicated with a horizontally arranged positioning pipe (401). The positioning pipe (401) and the connecting pipe (301) are rotationally arranged through a bearing. A plurality of air holes (10) are formed in the outer wall of the air pipe (4).

4. The camera for industrial intelligent vision acquisition according to claim 3, wherein Mounting rods (17) are installed at both ends of the rotating pipe (3) at the bottom of the mounting frame (1). The two mounting rods (17) are located in the area between the two air pipes (4). A magnetic block (18) is fixed at the bottom end of the mounting rod (17) facing the air pipe (4). Magnetic attraction sheets (19) are fixed on both sides of the positioning pipe (401) outside the air pipe (4). The positions of the magnetic attraction sheets (19) correspond to those of the magnetic block (18).

5. The camera for industrial intelligent vision acquisition according to claim 3, characterized in that, A pressure sensor (20) is installed at the bottom end where the rotating pipe (3) and the connecting pipe (301) are connected. The pressure sensor (20) is used to monitor the air pressure intensity of the air suction at the bottom end of the rotating pipe (3); The motor (5) is connected with a current monitoring module. The power monitoring module is used to monitor the current magnitude and fluctuation condition of the motor (5).

6. The camera for industrial intelligent vision acquisition according to claim 5, characterized in that, A torsion monitoring module is arranged in the rotating cylinder (13). The torsion monitoring module is used to monitor the torsion magnitude of the torsion spring.

7. The camera for industrial intelligent vision acquisition according to claim 6, characterized in that, The monitoring data of the pressure sensor (20), the current monitoring module and the torsion monitoring module are uploaded to a central processing unit. After comprehensive analysis and calculation, an evaluation coefficient is obtained. The calculation and judgment logic of the evaluation coefficient is as follows: Step 1: The pressure sensor (20) obtains the real-time monitored pressure value , and the current monitoring module obtains the real-time monitored current value , and the torque monitoring module obtains the real-time monitored torque value ; Step 2. Define the air pressure deviation rate , the current deviation rate and the torque deviation rate ; , where is the average air pressure value under normal conditions; , where is the average current value in the normal state; , where is the average torque value in the normal state; Step 3: Calculate the evaluation coefficient , , where , and are the weight coefficients of the air pressure deviation rate, the current deviation rate, and the torque deviation rate, respectively, and ; Step 4. Compare the evaluation coefficient with the preset threshold and where : When it indicates that the dust density under the lens is within the normal range; When it indicates that the dust density under the lens begins to increase; When it indicates that the dust density under the lens is too high.

8. A camera for industrial intelligent vision acquisition according to claim 7, characterized in that, In step three, , , .

Images