Plate and strip edge detection system

Abstract

The utility model discloses a plate strip edge detection system, which comprises a light source module, a driving module and a transmission mechanism, wherein the transmission mechanism comprises a screw rod connected with the driving module, a nut sleeved on the screw rod and linear guide rails arranged on two sides of the transmission screw rod; the detection module comprises a connecting plate fixedly connected with the nut and a first probe and a second probe which are fixed on the connecting plate, and the connecting plate is in sliding connection with the guide rail through a sliding block; wherein the plate strip runs between the light source module and the detection module; the first probe and the second probe face the light source at different angles, and the detection module is driven by lead screw transmission to move linearly. The first probe and the second probe detect the edge position of the plate strip according to the received light intensity signals. Through cooperation of a lead screw transmission structure, a guide rail and a sliding block, the movement positioning precision of the detection module is improved, through comparison reference of detection signals of the first probe and the second probe, the influence of external interference factors can be reduced, and the detection precision of the edge position of the plate strip is improved.

Description

Technical Field

[0001] This utility model relates to the field of material processing and forming technology, and in particular to a strip edge detection system. Background Technology

[0002] During the processing of metal sheet and strip materials, the sheet and strip run on the production line, and the edge of the sheet and strip will shift left and right in the lateral position of the production line. In order to control the position of the sheet and strip, the detection system first needs to detect the position of the edge of the sheet and strip.

[0003] However, most common metal strip edge detection systems currently use a pulley drive mechanism to control the probe position. A motor drives the detection module via a synchronous belt, and a potentiometer measures the pulley's rotation angle in real time to obtain the probe's absolute position. The elastic deformation of the synchronous belt causes errors in the tooth pitch, resulting in low positioning accuracy of the drive module. This affects the control accuracy of the detection module, ultimately reducing its accuracy in detecting the strip edge position. Furthermore, common metal strip edge detection systems use a single probe to measure the strip boundary position, and environmental interference can lead to inaccurate measurement results. Utility Model Content

[0004] The purpose of this invention is to provide a strip edge detection system to improve the detection accuracy of the detection module in detecting the position of the strip edge.

[0005] To solve the above-mentioned technical problems, the present invention provides a technical solution as follows: A strip edge detection system, comprising: a fixing frame including a vertical rod and a horizontal rod perpendicular to the vertical rod; a light source module including a strip light source fixedly arranged along the axial direction of the horizontal rod; a drive module including a drive motor, the motor being fixedly arranged at the end of the vertical rod; a transmission mechanism including a transmission lead screw arranged parallel to the horizontal rod, a nut sleeved on the lead screw, and linear guide rails arranged parallel and symmetrically on both sides of the lead screw; one end of the lead screw is fixedly connected to the output shaft of the motor through a coupling; a detection module including a connecting plate, First probe and second probe; the connecting plate is slidably connected to the guide rail via a slider and fixedly connected to the nut; the first probe and second probe are fixedly mounted on the connecting plate; control device: used to control the drive module and process the detection signal; wherein, the strip runs between the light source module and the detection module, the first probe is set perpendicular to the optical axis of the light source, the second probe is set inclined towards the light source, the motor drives the lead screw to rotate, driving the detection module to move along the guide rail, and the first probe and second probe are configured to detect the edge position of the strip based on the received light intensity signal.

[0006] Furthermore, the strip runs horizontally between the light source and the detection module, the central axis of the first probe is perpendicular to the plane of the strip, and the angle between the central axis of the second probe and the plane of the strip is an acute angle, and the acute angle is greater than 45°.

[0007] Furthermore, the control device includes a signal processing module, which is configured to: acquire the analog signal output by the detection module; process the analog signal to determine the position information of the strip edge; and generate a control signal based on the strip edge position information to drive the detection module to move along the strip edge.

[0008] Furthermore, the drive module also includes an encoder connected to the output shaft of the motor. The signal processing module communicates with the encoder in real time to obtain the position signal output by the encoder. The signal processing module uses the position signal to accurately locate the detection module.

[0009] Furthermore, the control device also includes a controller, which is communicatively connected to the signal processing module. The controller is configured to: send working instructions to the signal processing module and receive device status information fed back by the signal processing module, including board edge position information and / or detection module status information.

[0010] Furthermore, the focal point of the central axis of the first probe and the central axis of the second probe on the light source is the same point.

[0011] Furthermore, the focal points of the first probe's central axis and the second probe's central axis on the light source are located at different positions.

[0012] The strip edge detection system provided by this utility model, compared with the prior art, can precisely control the movement accuracy of the detection module by setting up a lead screw transmission mechanism to support the detection module and a linear guide rail. Under the guidance of the slider and the linear guide rail, the detection module can form a stable and high-precision linear displacement, reduce the offset of the linear movement of the detection module, improve the positioning accuracy of the detection module, and enhance the detection accuracy of the detection module for the strip edge position. At the same time, by using a detection module composed of a first probe and a second probe set at different angles relative to the strip, the detection position of the probes on the strip edge can be compared and referenced, reducing the influence of external interference factors on the detection of the strip edge position, and further improving the detection accuracy of the detection module for the strip edge position. Attached Figure Description

[0013] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings represent similar elements. Unless otherwise stated, the figures in the drawings do not constitute a limitation on scale.

[0014] Figure 1 This is a three-dimensional structural diagram of the strip edge detection system in an embodiment of the present invention;

[0015] Figure 2 This is a front view of the strip edge detection system in an embodiment of this utility model;

[0016] Figure 3 This is a schematic diagram of the transmission mechanism structure in an embodiment of this utility model;

[0017] Figure 4 This is a schematic diagram illustrating the detection principle of the detection module when the first probe and the second probe are focused on the same point in one embodiment of the present invention.

[0018] Figure 5 This is a schematic diagram illustrating the principle of the detection module detecting the edge position when the first probe and the second probe are focused at different points in one embodiment of the present invention.

[0019] Explanation of reference numerals in the attached drawings: 1. Control device; 11. Controller; 12. Signal processing module; 2. Drive module; 21. Motor; 3. Transmission mechanism; 31. Guide rail; 32. Slider; 33. Lead screw; 34. Nut; 35. Connector; 36. Fixing plate; 37. Coupling; 4. Detection module; 41. Connecting plate; 42. First probe; 43. Second probe; 5. Light source module; 51. Light source; 6. Control box; 7. Plate and strip; 8. Fixing frame; 81. Horizontal bar; 82. Vertical bar. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to facilitate a better understanding of this application. However, the technical solutions claimed in the claims of this application can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0021] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0022] As Figures 1-3As shown, one embodiment of this utility model relates to a strip edge detection system, including: a fixing frame 8, which includes a vertical rod 82 and a horizontal rod 81 perpendicular to the vertical rod 82. A control box 6 is fixed to the end of the vertical rod 82. The control box 6 contains a control device 1 and a drive module 2. The drive module 2 includes a drive motor 21 fixed in the control box 6; a transmission mechanism 3, including a transmission screw 33 parallel to the horizontal rod 81, a nut 34 sleeved on the screw 33, and linear guide rails 31 parallel and symmetrically arranged on both sides of the transmission screw 33. The nut 34 and the screw 33 form a transmission connection, and the screw 33 and the nut 34 are threadedly connected. The rotational motion of the lead screw 33 is converted into the linear motion of the nut 34; one end of the transmission lead screw 33 is fixedly connected to the output shaft of the drive motor 21 through the coupling 37, and the motor 21 can drive the lead screw 33 to rotate through the coupling 37; the other end is rotatably connected to the fixed plate 36 through the connector 35; the light source module 5 includes a strip light source 51 fixedly arranged along the axial direction of the crossbar 81. The strip light source 51 is a single set of light sources 51, or it can be formed by combining multiple sets of light sources 51. The multiple sets of light sources 51 can be arranged at intervals or adjacent to each other; the detection module 4 includes a connecting plate 41, a first probe 42 and a second probe 43, and the first probe 42 and the second probe 43 are fixedly arranged on the connecting plate 36. On the same side of the connecting plate 41, preferably, the first probe 42 and the second probe 43 are located on the same plane and are spaced apart. The central axis of the first probe 42 intersects the central axis of the second probe 43. On the other side of the connecting plate 41 relative to the first probe 42 and the second probe 43, it is slidably connected to the linear guide rail 31 via a slider 32 and fixedly connected to the nut 34. When the nut 34 moves linearly relative to the lead screw 33, the base plate fixedly connected to the nut 34 slides along the linear guide rail 31 through the cooperation of the slider 32 and the guide rail 31, maintaining a stable linear displacement. The control device 1 is used to control the drive module 2 and process the detection. The signal strip 7 operates between the light source module 5 and the detection module 4. The first probe 42 is perpendicular to the strip light source 51, capable of receiving and detecting the light emitted by the strip light source 51 and generating an analog signal. The second probe 43 is tilted towards the strip light source 51, also capable of receiving and generating an analog signal. The control device 1 controls the drive module 2 based on the detection signal from the detection module 4. The lead screw 33 rotates under the drive of the drive motor 21, and the nut 34 sleeved on the lead screw 33 drives the detection module 4 to move along the linear guide rail 31. The first probe 42 and the second probe 43 detect the edge position of the strip 7 based on the received light intensity signal. When the strip 7 moves between the detection module 4 and the strip light source 51, the first probe 42 and the second probe 43 receive the light passing through the strip 7 and generate an analog signal.Since the light intensity corresponding to the part blocked by the strip 7 received by the detection module 4 will be much less than the light intensity corresponding to the unblocked part, that is, the light intensity corresponding to the edge position of the strip 7 will change abruptly, the detection module 4 will detect and locate the edge position based on the measured light intensity change process at different positions and record the position of the light intensity change.

[0023] In existing metal strip edge detection systems, pulley transmission mechanisms are mainly used to control the probe position. Specifically, a motor drives the detection module via a synchronous belt. However, the elastic deformation of the synchronous belt causes errors in the tooth pitch, resulting in low positioning accuracy of the drive module. The strip edge detection system provided by this invention uses a lead screw 33 to control the linear displacement of the detection module 4. This allows for precise control of the movement distance of the detection module 4. Guided by the slider 32 and the linear guide rail 31, the detection module 4 achieves stable, high-precision linear displacement, reducing the offset of its linear movement and improving its positioning accuracy. This enhances the detection accuracy of the detection module 4 in detecting the edge position of the strip 7.

[0024] One embodiment involves a strip edge detection system. The strip 7 runs horizontally between a strip light source 51 and a detection module 4, with its running direction perpendicular to the plane formed by the detection module 4 and the strip light source 51. The central axis of the first probe 42 is perpendicular to the plane of the strip 7, and the angle between the central axis of the second probe 43 and the plane of the strip 7 is acute, with the acute angle greater than 45°. By vertically positioning the first probe 42 and tilting the second probe 43, and by comparing the detection signals from the first probe 42 and the second probe 43, external interference can be effectively reduced, improving the detection accuracy of the detection module 4 in detecting the edge position of the strip 7.

[0025] One embodiment relates to a strip edge detection system. The control device 1 includes a signal processing module 12, which is configured to: acquire the analog signal output by the detection module 4; process the analog signal to determine the edge position information of the strip 7; and generate a control signal based on the edge position information of the strip 7 to drive the detection module 4 to move along the edge of the strip 7. The signal processing module 12 acquires the analog signal provided by the detection module 4, amplifies it to obtain a stable DC signal, and uses a PID algorithm to obtain the motion mode of the motor 21. The motor 21 drives the transmission mechanism 3 with the lead screw 33 to drive the movement of the detection module 4. Thus, the detection module 4 can stably and efficiently follow the changes in the edge position of the strip 7. It should be noted that the strip involved in this invention has low light transmittance, which should be less than 50%, and is particularly suitable for metal strips.

[0026] One embodiment involves a strip edge detection system. The drive module 2 further includes an encoder (not shown in the figures). The encoder is connected to the output shaft of the drive motor 21. The signal processing module 12 communicates with the encoder in real time to obtain the position signal output by the encoder. The signal processing module 12 uses the position signal to accurately position the detection module 4. Preferably, the control device 1 further includes a controller 11, which is communicatively connected to the signal processing module 12. The controller 11 is configured to: send working instructions to the signal processing module 12, and receive equipment status information fed back by the signal processing module 12, including strip edge position information and / or detection module 4 status information. Through the communication connection between the controller 11 and the signal processing module 12, different working instructions can be input according to the type of strip 7 to control the motion of the motor 21. At the same time, the controller 11 receives and displays the equipment status, enabling quick and timely equipment maintenance. The signal processing module 12 communicates with the encoder in real time. The signal processing module 12 directly reads the encoder signal on the motor 21 driver through the digital interface, thereby obtaining the specific position of the detection module 4. By using high-precision encoder products, the control accuracy of the drive module 2 on the probe position can be greatly improved, thereby further improving the detection accuracy of the detection module 4 on the edge position of the strip 7.

[0027] like Figure 5 As shown, in one embodiment, a strip edge detection system is involved, wherein the focal point of the central axis of the first probe 42 and the central axis of the second probe 43 on the light source 51 is the same point. When the first probe 42 is affected by external light pollution and deviates in detecting the edge position of the strip 7, the detection point of the second probe 43 is used as a reference for the background brightness of the detection point. This can effectively reduce the impact of light pollution on the detection of the edge position of the strip 7 and improve the detection accuracy of the detection module 4 in detecting the edge position of the strip 7.

[0028] like Figure 4 As shown, in one embodiment, a strip edge detection system is provided, wherein the focal points of the central axes of the first probe 42 and the second probe 43 on the light source 51 are located at different positions. By using the different focal positions of the first probe 42 and the second probe 43 on the light source 51, the position of the strip edge 7 can be compared and verified, reducing the impact of light source 51 malfunctions or strip 7 running fluctuations on detection accuracy, and improving the detection accuracy of the detection module 4 in detecting the position of the strip edge 7.

[0029] The strip edge detection system provided by this utility model, through the setting of a screw transmission mechanism supporting the detection module and the guiding setting of a linear guide rail, can precisely control the movement accuracy of the detection module. Under the guidance of the slider and the linear guide rail, the detection module can form a stable and high-precision linear displacement, reduce the offset of the linear movement of the detection module, improve the positioning accuracy of the detection module, and enhance the detection accuracy of the detection module for the strip edge position. At the same time, through the detection module consisting of a first probe and a second probe set at different angles relative to the strip, the detection position of the probes on the strip edge can be compared and referenced, reducing the influence of external interference factors on the detection of the strip edge position, and further improving the detection accuracy of the detection module for the strip edge position.

[0030] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications and improvements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the claims.

Claims

1. A strip edge detection system, characterized by include: Fixture (8): includes a vertical rod (82) and a horizontal rod (81) set vertically to the vertical rod (82); Light source module (5): includes a strip light source (51) fixedly arranged along the axial direction of the crossbar (81); Drive module (2): includes a drive motor (21), which is fixedly mounted at the end of the vertical rod (82); Transmission mechanism (3): includes a transmission screw (33) arranged parallel to the cross bar (81), a nut (34) sleeved on the screw (33), and linear guide rails (31) arranged parallel and symmetrically on both sides of the screw (33); one end of the screw (33) is fixedly connected to the output shaft of the motor (21) through a coupling (37); Detection module (4): includes a connecting plate (41), a first probe (42) and a second probe (43); the connecting plate (41) is slidably connected to the guide rail (31) via a slider (32) and fixedly connected to the nut (34); the first probe (42) and the second probe (43) are fixedly mounted on the connecting plate (41); Control device (1): used to control the drive module (2) and process the detection signal; The strip (7) runs between the light source module (5) and the detection module (4). The first probe (42) is set perpendicular to the optical axis of the light source (51), and the second probe (43) is set at an angle to the light source (51). The motor (21) drives the lead screw (33) to rotate, thereby moving the detection module (4) along the guide rail (31). The first probe (42) and the second probe (43) are configured to detect the edge position of the strip (7) based on the received light intensity signal.

2. The strip edge detection system of claim 1, wherein The strip (7) runs horizontally between the light source (51) and the detection module (4). The central axis of the first probe (42) is perpendicular to the plane of the strip (7). The angle between the central axis of the second probe (43) and the plane of the strip (7) is an acute angle, and the acute angle is greater than 45°.

3. The strip edge detection system of claim 1, wherein The control device (1) includes a signal processing module (12), which is configured to: acquire the analog signal output by the detection module (4); process the analog signal to determine the edge position information of the strip (7); generate a control signal based on the edge position information of the strip (7) to drive the detection module (4) to move along the edge of the strip (7).

4. The strip edge detection system of claim 3, wherein The drive module (2) also includes an encoder, which is connected to the output shaft of the motor (21). The signal processing module (12) communicates with the encoder in real time to obtain the position signal output by the encoder. The signal processing module (12) uses the position signal to accurately position the detection module (4).

5. The strip edge detection system according to claim 3 or 4, characterized in that The control device (1) further includes a controller (11), which is communicatively connected to the signal processing module (12). The controller (11) is configured to: send working instructions to the signal processing module (12) and receive device status information fed back by the signal processing module (12), including the edge position information of the board (7) and / or the status information of the detection module (4).

6. The strip edge detection system of claim 1, wherein The focal point of the central axis of the first probe (42) and the central axis of the second probe (43) on the light source (51) is the same point.

7. The strip edge detection system according to claim 1, characterized in that, The focal points of the first probe (42) and the second probe (43) on the light source (51) are located at different positions.

Images