Strip steel thickness real-time monitoring system and method based on laser ranging

Abstract

The invention provides a strip steel thickness real-time monitoring system and method based on laser ranging. The strip steel thickness real-time monitoring system comprises a laser monitoring unit, a transmission unit, a laser correction unit and a data processing unit. The laser monitoring unit comprises a base, a monitoring assembly connected to the base and a vibration isolation base arranged between the base and the monitoring assembly. The laser monitoring unit comprises a base frame, a first detection part moving in the strip steel conveying direction, a second detection part arranged on the first detection part and a driving assembly driving the second detection part. The first detection part comprises first detection pieces arranged on the upper side and the lower side of the strip steel and is used for detecting the thickness of the strip steel; the second detection part is arranged on the side, away from the initial end, of the first detection piece. The second detection part comprises a mechanical detection assembly and a pressing assembly. The mechanical detection assembly is used for collecting the deformation error value of the strip steel. The problem of measurement flicker caused by strip steel surface deformation is solved, and the strip steel thickness measurement accuracy can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of monitoring equipment in the field of metal smelting, and particularly relates to a real-time strip thickness monitoring system based on laser ranging. The present invention also relates to a method for monitoring a strip using the monitoring system. Background Art

[0002] In the industrial field, accurate thickness measurement of strips is crucial for ensuring product quality, safety performance, and the stability of the production process. Although laser thickness gauges have a certain environmental adaptability, drastic changes in factors such as temperature, humidity, and vibration in the environment may still have a certain impact on the measurement accuracy. For example, in an environment with large temperature changes, the propagation speed of the laser may change, thereby affecting the accuracy of the measurement results. Especially for the hot-rolled wire rod site, due to the harsh on-site environment, high requirements for the optical-mechanical part of the laser thickness gauge, and short optical paths, the accuracy and stability of the instrument are affected, and the laser tube is relatively easy to be damaged.

[0003] In addition, the rolling speed's influence on the thickness gauge is one of the important parameters in the monitoring process. When the rolling speed is too fast, the accuracy of the thickness gauge will be affected, resulting in inaccurate measurement results. At high rolling speeds, large eddy currents and vibrations will be generated, making it impossible for the thickness gauge to accurately detect the thickness of the strip. Moreover, the texture, protrusions, or pits on the surface of the strip material will directly affect the measurement results.

[0004] In addition, when the difference between the protrusions or holes on the strip surface and the strip surface increases, the original signal is affected, that is, the difference between the detection signal and the reference signal is large, and the flashing problem is likely to occur, resulting in inaccurate measurement results and unable to effectively ensure the measurement effect of the laser thickness gauge. Summary of the Invention

[0005] In view of this, the present invention aims to propose a real-time strip thickness monitoring system based on laser ranging to solve the measurement flashing problem caused by strip surface deformation and improve the measurement accuracy of strip thickness.

[0006] To achieve the above object, the technical solution of the present invention is realized as follows:

[0007] A real-time strip thickness monitoring system based on laser ranging includes a laser monitoring unit, a transmission unit, a laser correction unit, and a data processing unit;

[0008] The laser monitoring unit includes a base, a monitoring component connected to the base, and a vibration isolation base provided between the base and the monitoring component;

[0009] The laser monitoring unit includes a base frame, a first detection part moving along the strip transmission direction, a second detection part provided on the first detection part, and a driving component for driving the second detection part;

[0010] The first detection unit includes first detection members provided on both the upper and lower sides of the strip steel, and the first detection unit is used to detect the thickness of the strip steel; the second detection unit is provided on one side of the first detection member away from the initial end;

[0011] The second detection unit includes a mechanical detection component and a pressing component, and the mechanical detection component is used to collect the deformation error value of the strip steel.

[0012] Further, the first detection unit further includes a mounting bracket connected to the base frame. The mounting bracket is in a "C" shape, and the two first detection members are respectively connected to both ends of the mounting bracket; the strip steel passes through the middle of the mounting bracket.

[0013] Further, a driving transmission component and a driven transmission component are provided at both ends of the base frame along the strip steel transmission direction, and a first driving unit is provided above the base frame. The driving transmission component and the driven transmission component are transmitted through a belt, and the second detection unit is connected to the belt.

[0014] Further, along the width direction of the strip steel, two opposite cross beams are respectively provided at both ends of the base frame. Guide rails are provided on the cross beams, and a guide seat is slidably connected to the guide rails. The guide seat is connected to the belt;

[0015] The second detection unit includes a connecting beam connected to the guide seat, and the mechanical detection component is provided on the connecting beam.

[0016] Further, the mechanical detection component includes a second driving unit, a first hinge seat provided on the power output end of the second driving unit, a first mounting seat pivotally connected to the first hinge seat, a telescopic tube connected to the first mounting seat, and a touch plate connected to the lower end of the telescopic tube;

[0017] The telescopic tube includes a fixed end and a movable end; the touch plate is connected to the movable end, and an elastic member is provided between the movable end and the fixed end, and a second detection member for detecting the telescopic amount of the elastic member;

[0018] The second driving unit drives the touch plate to abut against or away from the strip steel.

[0019] Further, a profile is further provided between the telescopic tube and the touch plate. Locking plates are provided on the outside of the mounting seat. The two locking plates are provided on both sides of the telescopic rod. Flanges bent towards the middle are provided below the locking plates. Protrusions engaged with the flanges are provided on the profile. Connecting plates are provided at the ends of the two locking plates, and the connecting plates fix the locking plates on both sides of the mounting seat.

[0020] Further, the pressing component includes a third driving part connected to the connecting beam, a second hinge seat connected to the power output end of the third driving part, a second mounting seat pivotally connected to the second hinge seat, a rectangular tube connected to the second mounting seat, and a pressing plate connected to the lower end of the rectangular tube;

[0021] The third driving part drives the pressing plate to abut against or away from the strip steel.

[0022] Further, the laser correction unit further includes a support plate arranged on the base frame, and a fourth driving part for driving the support plate to slide along the width direction of the strip steel is arranged on the base frame;

[0023] A correction plate is arranged on the support plate.

[0024] Further, the data processing unit includes a microcontroller module, a power management module, a display module, a communication module, a signal processing module, a time measurement and distance calculation module, and a receiving module for receiving laser emission signals;

[0025] The data processing unit is arranged inside the base frame.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] For the strip steel thickness real-time monitoring system based on laser ranging of the present invention, a first detection part is provided to detect the thickness of the strip steel, and a driving component and a second detection part are additionally provided. The mechanical detection component of the second detection part is used to collect the deformation error value of the strip steel, realizing the combination of mechanical measurement and laser measurement to achieve the purpose of calibration, and avoiding the inaccuracy of measurement data caused by the flashing of the first detection piece due to the deformation of the strip steel. At the same time, driven by the driving component, the first detection part can perform detection when it has the same transmission speed as the strip steel and is relatively stationary with respect to the strip steel, and the first detection piece performs detection when the pressing component presses the strip steel, further ensuring the accuracy of the detection data.

[0028] Another object of the present invention is to propose a strip steel thickness real-time monitoring method based on laser ranging, and this monitoring method includes the following steps:

[0029] Step 1, the transmission unit transmits the strip steel at a predetermined speed so that the strip steel passes through the monitoring space of the laser monitoring unit;

[0030] Step 2, the mechanical detection component of the second detection part is in terminal contact with the strip steel. During the transmission of the strip steel, the mechanical detection component collects the telescopic value of the strip steel caused by the convex or concave plane of the strip steel, and transmits the telescopic value to the data processing unit for calculation to obtain the deformation error value of the strip steel;

[0031] Step 3: The driving component drives the first detection part and the second detection part to move from the initial end of the base frame to the terminal end. During this process, adjust the moving speed of the first detection part and the second detection part to be the same as the predetermined speed. The pressing component is fixed on the strip steel, and the first detection part conducts detection;

[0032] The first detection piece emits laser beams on both the upper surface and the lower surface of the strip steel, and receives the reflected light. The optical influence is converted into an electrical signal through a charge-coupled device, and the electrical signal is transmitted to the data processing unit for calculation;

[0033] Step 4: Calculate the distances between the upper surface and the lower surface of the strip steel and the sensor. Calculate the thickness of the strip steel through the two measured distances between the sensor;

[0034] The calculation formula for the strip steel thickness is: Strip steel thickness = H - h1 - h2

[0035] Wherein, H is the distance between the two laser ranging sensors, h1 is the distance measured by the upper laser ranging sensor, and h2 is the distance measured by the lower laser ranging sensor;

[0036] Step 5: Determine whether the deformation error value in Step 2 exceeds the set threshold; when the deformation error value collected in Step 2 exceeds the threshold, calculate whether the error between the strip steel thickness dimension and the initial thickness dimension is equal to the deformation error value. If the difference calculation exceeds the tolerance range, the data processing unit issues an alarm signal;

[0037] Step 6: If the deformation error value does not exceed the set threshold, the driving component drives the first detection part and the second detection part to move from the terminal end of the base frame to the initial end for reset;

[0038] Step 7: After a set distance, repeat Steps 2 to 6 again until the strip steel is completely transmitted.

[0039] In the real-time strip steel thickness monitoring method based on laser ranging described in the present invention, after the mechanical detection component in Step 2 contacts the transmitted strip steel, it expands and contracts due to the convex or concave phenomenon of the strip steel, and then the expansion and contraction value is collected to obtain the deformation error value of the strip steel. The thickness measurement value of the strip steel is obtained through the detection and calculation in Steps 3 and 4. Compare the thickness dimension with the initial dimension. If the difference between the error value and the obtained deformation error value is within the tolerance range, the measurement can continue. If the difference exceeds the tolerance range, it indicates that the deformation of the strip steel is large, and the data processing unit issues an alarm signal for subsequent processing. The monitoring method of the present invention uses mechanical detection to recheck the data monitored by the laser, avoiding measurement data errors caused by inaccurate laser test sensors and ensuring the accuracy of the strip steel thickness measurement. Description of the Drawings

[0040] The accompanying drawings that form a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0041] Figure 1 is the front view schematic diagram of the strip thickness real-time monitoring system based on laser ranging according to the embodiment of the present invention;

[0042] Figure 2 is the top view schematic diagram of the strip thickness real-time monitoring system based on laser ranging according to the embodiment of the present invention;

[0043] Figure 3 is the front view schematic diagram of the active transmission component according to the embodiment of the present invention;

[0044] Figure 4 is the front view schematic diagram of the second detection part according to the embodiment of the present invention;

[0045] Figure 5 is the side view schematic diagram of the second detection part according to the embodiment of the present invention;

[0046] Figure 6 is the side view schematic diagram of the mechanical detection component according to the embodiment of the present invention;

[0047] Figure 7 is the connection structure schematic diagram of the first hinge seat, telescopic tube, elastic member, profile, and touch plate according to the embodiment of the present invention;

[0048] Figure 8 is the three-dimensional connection schematic diagram of the second driving part, the first hinge seat, and the first mounting seat according to the embodiment of the present invention.

[0049] Explanation of reference numerals:

[0050] 1, laser monitoring unit; 2, transmission unit; 3, vibration isolation seat; 4, base; 5, strip; 6, support plate; 7, fourth driving part; 8, correction plate;

[0051] 101, base frame; 102, first detection part; 103, active transmission component; 104, driven transmission component; 105, second detection part; 106, driving component; 107, first driving part; 108, cross beam; 109, guide rail; 110, guide seat; 111, belt; 112, connecting beam;

[0052] 301, mechanical detection component; 302, pressing component;

[0053] 1021, mounting frame;

[0054] 3011. Second driving part; 3012. First hinge seat; 3013. First mounting seat; 3014. Telescopic tube; 3015. Touch plate; 3016. Elastic member; 3017. Profile; 3018. Locking plate; 3019. Protrusion;

[0055] 3020. Connecting plate;

[0056] 3021. Rectangular tube; 3022. Pressing plate. Detailed implementation mode

[0057] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0058] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "back", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0059] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection", "connection member" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in combination with specific situations.

[0060] The present invention will be described in detail below with reference to the drawings and in combination with embodiments.

[0061] This embodiment relates to a strip thickness real-time monitoring system based on laser ranging. Generally speaking, as Figures 1 to 2 shown, the monitoring system includes a laser monitoring unit 1, a transmission unit 2, a laser correction unit, and a data processing unit. The laser monitoring unit 1 includes a base 4, a monitoring component connected to the base 4, and a vibration isolation seat 3 provided between the base 4 and the monitoring component. The laser monitoring unit 1 includes a base frame 101, a first detection part 102 that moves along the transmission direction of the strip 5, a second detection part 105 provided on the first detection part 102, and a driving component 106 that drives the second detection part 105.

[0062] Among them, the first detection unit 102 includes first detection components arranged on the upper and lower sides of the strip steel 5. The first detection unit 102 is used to detect the thickness of the strip steel 5. The second detection unit 105 is arranged on one side of the first detection component away from the initial end. The second detection unit 105 includes a mechanical detection component 301 and a pressing component 302. The mechanical detection component 301 is used to collect the deformation error value of the strip steel 5.

[0063] In the real-time monitoring system for the thickness of the strip steel 5 based on laser ranging of this embodiment, by setting the first detection unit 102 to detect the thickness of the strip steel 5, and additionally setting the driving component 106 and the second detection unit 105. The mechanical detection component 301 of the second detection unit 105 is used to collect the deformation error value of the strip steel 5, realizing the combination of mechanical measurement and laser measurement to achieve the purpose of calibration, and avoiding the inaccuracy of measurement data caused by the flashing of the first detection component due to the deformation of the strip steel 5. At the same time, under the drive of the driving component 106, the first detection unit 102 can detect when it is at the same transmission speed as the strip steel 5 and the two are relatively stationary. When the pressing component 302 presses the strip steel 5, the first detection component conducts detection, further ensuring the accuracy of the detection data.

[0064] Based on the above overall introduction, an exemplary structure of the real-time monitoring system for the thickness of the strip steel 5 based on laser ranging of this embodiment is as Figures 1 to 2 shown. This monitoring system is placed after rolling in the strip steel 5 production line and can conduct real-time monitoring on the thickness of the rolled strip steel 5. Moreover, in this embodiment, by setting the vibration isolation base 3, the base 4 is isolated from the monitoring component, reducing the vibration frequency of the monitoring component caused by its connection with the production line and improving the monitoring effect.

[0065] As a preferred implementation manner, as Figures 1 to 2 shown, the first detection unit 102 further includes a mounting frame 1021 connected to the base frame 101. The mounting frame 1021 is in a "C" shape, and two first detection components are respectively connected to both ends of the mounting frame 1021. The strip steel 5 passes through the middle of the mounting frame 1021. The first detection component in this embodiment is a laser displacement sensor.

[0066] In addition, as Figures 1 to 4 shown, active transmission components 103 and driven transmission components 104 arranged along the transmission direction of the strip steel 5 are provided at both ends of the base frame 101, and a first driving part 107 is provided above the base frame 101. The active transmission components 103 and the driven transmission components 104 are transmitted through a belt 111, and the second detection unit 105 is connected to the belt 111. As a specific implementation manner, the first driving part 107 adopts a motor with a speed reducer.

[0067] Furthermore, still as Figures 1 to 4As shown, along the width direction of the strip steel 5, two cross beams 108 arranged oppositely are respectively provided at both ends of the base frame 101. A guide rail 109 is provided on the cross beam 108, and a guide seat 110 is slidably connected to the guide rail 109. The guide seat 110 is connected to the belt 111; the second detection part 105 includes a connecting beam 112 connected to the guide seat 110, and the mechanical detection component 301 is arranged on the connecting beam 112.

[0068] As Figures 1 to 4 shown, the active transmission component 103 includes an active transmission shaft connected to the base frame 101, active belt wheels connected to both ends of the active transmission shaft, and an active wheel arranged on the transmission shaft. The power output end of the first driving part 107 is connected with a driving wheel, and the driving wheel and the active wheel are driven by the belt 111.

[0069] As described above, two opposite cross beams 108 are provided at both ends of the base frame 101. The length direction of the cross beam 108 is arranged along the transmission direction. Both the second detection part 105 and the first detection part 102 are driven to move along the length direction of the cross beam 108. The driven transmission component 104 includes a driven transmission shaft and driven belt wheels connected to both ends of the driven transmission shaft. The active transmission shaft and the driven transmission shaft are respectively arranged at both ends of the cross beam 108, and the active belt wheels and the driven belt wheels are connected by a transmission belt 111. The second detection part 105 is connected to the transmission belt 111.

[0070] As a preferred embodiment, in combination with Figures 3 to 8 shown, the mechanical detection component 301 includes a second driving part 3011, a first hinge seat 3012 arranged on the power output end of the second driving part 3011, a first mounting seat 3013 pivotally connected to the first hinge seat 3012, a telescopic tube 3014 connected to the first mounting seat 3013, and a touch plate 3015 connected to the lower end of the telescopic tube 3014. The telescopic tube 3014 includes a fixed end and a movable end; the touch plate 3015 is connected to the movable end, and an elastic member 3016 and a second detection member for detecting the telescopic amount of the elastic member 3016 are arranged between the movable end and the fixed end. The second driving part 3011 drives the touch plate 3015 to abut against or away from the strip steel 5.

[0071] In this embodiment, the second driving part 3011 adopts a telescopic cylinder. The power output end of the telescopic cylinder is connected to the first hinge seat 3012 through a pin shaft. The two first mounting seats 3013 are respectively connected to the cylinders on both sides of the first hinge seat 3012. A locking groove is provided on the first mounting seat 3013. The first mounting seat 3013 is sleeved on the first hinge seat 3012 and tightened by bolts so that the two are fastened. When it is necessary to adjust the angle of the touch plate 3015 relative to the strip steel 5, the bolts can be loosened for adjustment, which can adapt to strip steels 5 of different specifications.

[0072] Further, as Figures 5 to 8 shown, a profile 3017 is also provided between the telescopic tube 3014 and the touch plate 3015. A locking plate 3018 is provided outside the mounting seat. The two locking plates 3018 are arranged on both sides of the telescopic rod. A flanging bent towards the middle is provided below the locking plate 3018. A protrusion 3019 engaged with the flanging is provided on the profile 3017. Connecting plates 3020 are provided at the ends of the two locking plates 3018, and the connecting plates 3020 fix the locking plates 3018 on both sides of the mounting seat. By providing the locking plate 3018, it is convenient to fix the profile 3017 and the telescopic tube 3014, increasing the convenience and efficiency of assembly.

[0073] In addition, as Figure 5 shown, the pressing assembly 302 includes a third driving part connected to the connecting beam 112, a second hinge seat connected to the power output end of the third driving part, a second mounting seat pivotally connected to the second hinge seat, a rectangular tube 3021 connected to the second mounting seat, and a pressing plate 3022 connected to the lower end of the rectangular tube 3021. The third driving part drives the pressing plate 3022 to abut against or away from the strip steel 5. As Figure 1 shown, the two connecting beams 112 are respectively connected to the upper and lower ends of the mounting frame 1021. In this embodiment, two groups of monitoring components are respectively arranged above and below the base frame 101 to facilitate the omnidirectional monitoring of both sides of the strip steel 5.

[0074] More specifically, as Figures 1 to 2 shown, the laser correction unit further includes a support plate 6 arranged on the base frame 101. A fourth driving part 7 for driving the support plate 6 to slide along the width direction of the strip steel 5 is provided on the base frame 101. A correction plate 8 is provided on the support plate 6. By providing the correction plate 8, the laser displacement sensor is corrected regularly to ensure the accuracy of the measurement result.

[0075] The data processing unit of this embodiment includes a microcontroller module, a power management module, a display module, a communication module, a signal processing module, a time measurement and distance calculation module, and a receiving module for receiving laser emission signals. The data processing unit is arranged inside the base frame 101, and a protective cover is provided outside the base frame 101 to prevent external dust from entering.

[0076] Among them, the first detection component includes a laser diode with high power and narrow pulse width as the emitter, and the receiving module uses a photosensitive diode with high-speed response as the receiver. Through an appropriate filtering circuit, the interference of ambient light can be reduced and the signal-to-noise ratio can be improved.

[0077] In this embodiment, an STM32F103 series microcontroller is used as the core of the system. It has a built-in high-performance ARM Cortex-M3 core, multiple peripheral interfaces and rich timer resources, meeting the requirements of the laser ranging system. The communication module supports data exchange with other devices or the host computer. Signal processing module: Through the ADC function of STM32, the analog signal is converted into a digital signal, and digital signal processing algorithms such as filtering and amplification are used to improve the signal quality and reduce noise interference. The time measurement and distance calculation module uses the high-precision timer of STM32 to accurately measure the time difference between the emission and reception of laser pulses, and combines the speed of light constant to calculate the distance between the target and the ranging system through trigonometric functions.

[0078] This embodiment also relates to a real-time strip thickness monitoring method based on laser ranging. The monitoring method includes the following steps:

[0079] Step 1, the transmission unit 2 transmits the strip 5 at a predetermined speed, so that the strip 5 passes through the monitoring space of the laser monitoring unit 1.

[0080] Step 2, the mechanical detection component 301 of the second detection part 105 contacts the strip 5 terminally. During the transmission of the strip 5, the mechanical detection component 301 collects the telescopic value caused by the protrusion or depression on the plane of the strip 5, and transmits the telescopic value to the data processing unit for calculation to obtain the deformation error value of the strip 5.

[0081] Step 3, the driving component 106 drives the first detection part 102 and the second detection part 105 to move from the initial end to the terminal end of the base frame 101. During this process, the moving speeds of the first detection part 102 and the second detection part 105 are adjusted to be the same as the predetermined speed, the pressing component 302 is fixed on the strip 5, and the first detection part 102 performs detection.

[0082] The first detection component emits laser beams on the upper and lower surfaces of the strip 5 at the same time and receives the reflected light. The optical influence is converted into an electrical signal through a charge-coupled device, and the electrical signal is transmitted to the data processing unit for calculation.

[0083] Step 4, calculate the distances between the upper and lower surfaces of the strip 5 and the sensor, and calculate the thickness of the strip 5 through the two measured distances between the sensor.

[0084] The calculation formula for the thickness of the strip 5 is: Strip 5 thickness = H - h1 - h2

[0085] Where, H is the distance between the two laser ranging sensors, h1 is the distance measured by the upper laser ranging sensor, and h2 is the distance measured by the lower laser ranging sensor.

[0086] Step 5: Determine whether the deformation error value in Step 2 exceeds the set threshold; when the deformation error value collected in Step 2 exceeds the threshold, calculate whether the error between the thickness dimension of the strip 5 and the initial thickness dimension is equal to the deformation error value. If the difference calculation exceeds the tolerance range, the data processing unit issues an alarm signal.

[0087] Step 6: If the deformation error value does not exceed the set threshold, the driving assembly 106 drives the first detection unit 102 and the second detection unit 105 to move and reset from the terminal of the base frame 101 to the initial end.

[0088] Step 7: After a set distance, repeat Steps 2 to 6 again until the strip 5 is completely transported.

[0089] In the real-time strip thickness monitoring method based on laser ranging of this embodiment, after the mechanical detection component 301 in Step 2 contacts the transported strip 5, it expands and contracts due to the convex or concave phenomenon of the strip 5, and then the telescopic value is collected to obtain the deformation error value of the strip 5. The thickness measurement value of the strip 5 is obtained through the detection and calculation in Steps 3 and 4. The thickness dimension is compared with the initial dimension. If the difference between the error value and the obtained deformation error value is within the tolerance range, the measurement can continue. If this difference exceeds the tolerance range, it means that the deformation of the strip 5 is large, and the data processing unit issues an alarm signal for subsequent processing. In the monitoring method of the present invention, mechanical detection is used to recheck the data monitored by laser to avoid incorrect measurement data caused by inaccurate laser test sensors and ensure the accuracy of the thickness measurement of the strip 5.

[0090] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A real-time monitoring system for strip thickness based on laser ranging, characterized in that: It comprises a laser monitoring unit (1), a transmission unit (2), a laser correction unit, and a data processing unit; The laser monitoring unit (1) comprises a base (4), a monitoring component connected to the base (4), and a vibration isolation seat (3) arranged between the base (4) and the monitoring component; The monitoring component comprises a base frame (101), a first detection part (102) moving along the transmission direction of the strip steel (5), a second detection part (105) arranged on the first detection part (102), and a driving component (106) driving the second detection part (105); The first detection part (102) comprises first detection pieces arranged at the upper and lower sides of the steel strip (5), and the first detection part (102) is used to detect the thickness of the steel strip (5); the second detection part (105) is arranged at a side of the first detection piece away from the initial end; The second detection part (105) comprises a mechanical detection component (301) and a pressing component (302), wherein the mechanical detection component (301) is used to collect the deformation error value of the steel strip (5).

2. The real-time monitoring system for strip thickness based on laser ranging according to claim 1 is characterized in that: The first detection part (102) further comprises a mounting frame (1021) connected to the base frame (101); the mounting frame (1021) is in a "C" shape; two first detection members are respectively connected to two ends of the mounting frame (1021); and the steel strip (5) is transmitted through the middle of the mounting frame (1021).

3. The real-time monitoring system for strip thickness based on laser ranging according to claim 2 is characterized in that: An active transmission component (103) and a driven transmission component (104) are provided at both ends of the base frame (101) along the transmission direction of the strip steel (5), and a first driving unit (107) is provided above the base frame (101). The active transmission component (103) and the driven transmission component (104) are transmitted via a belt (111), and the second detection unit (105) is connected to the belt (111).

4. The real-time monitoring system for strip thickness based on laser ranging according to claim 3 is characterized in that: Along the width direction of the strip steel (5), two oppositely arranged cross beams (108) are respectively provided at both ends of the base frame (101), a guide rail (109) is provided on the cross beam (108), a guide seat (110) is slidably connected to the guide rail (109), and the guide seat (110) is connected to the belt (111); The second detection portion (105) comprises a connection beam (112) connected to the guide seat (110), and the mechanical detection component (301) is arranged on the connection beam (112).

5. The real-time monitoring system for strip thickness based on laser ranging according to claim 4 is characterized in that: The mechanical detection component (301) comprises a second driving part (3011), a first hinged seat (3012) arranged on the power output end of the second driving part (3011), a first mounting seat (3013) pivotally connected to the first hinged seat (3012), a telescopic tube (3014) connected to the first mounting seat (3013), and a touch plate (3015) connected to the lower end of the telescopic tube (3014); The telescopic tube (3014) comprises a fixed end and a movable end; the touch plate (3015) is connected to the movable end, and an elastic member (3016) and a second detection member for detecting the telescopic amount of the elastic member (3016) are provided between the movable end and the fixed end; The second driving part (3011) drives the contact plate (3015) to abut against or move away from the steel strip (5).

6. The real-time monitoring system for strip thickness based on laser ranging according to claim 5 is characterized in that: A profile (3017) is also provided between the telescopic tube (3014) and the touch plate (3015), a locking plate (3018) is provided on the outer side of the mounting seat, two locking plates (3018) are provided on both sides of the telescopic rod, a flange bent toward the middle is provided below the locking plate (3018), a protrusion (3019) engaged with the flange is provided on the profile (3017), and connecting plates (3020) are provided at the ends of the two locking plates (3018), and the connecting plates (3020) fix the locking plates (3018) to both sides of the mounting seat.

7. The real-time monitoring system for strip thickness based on laser ranging according to claim 6 is characterized in that: The pressing assembly (302) comprises a third driving part connected to the connecting beam (112), a second hinged seat connected to the power output end of the third driving part, a second mounting seat pivotally connected to the second hinged seat, a rectangular tube (3021) connected to the second mounting seat, and a pressing plate (3022) connected to the lower end of the rectangular tube (3021); The third driving unit drives the pressing plate (3022) to abut against or move away from the steel strip (5).

8. The real-time monitoring system for strip thickness based on laser ranging according to claim 6 is characterized in that: The laser correction unit further comprises a support plate (6) arranged on the base frame (101), and the base frame (101) is provided with a fourth driving part (7) for driving the support plate (6) to slide along the width direction of the strip steel (5); A correction plate (8) is provided on the support plate (6).

9. The real-time monitoring system for strip thickness based on laser ranging according to claim 1 is characterized in that: The data processing unit includes a microcontroller module, a power management module, a display module, a communication module, a signal processing module, a time measurement and distance calculation module, and a receiving module for receiving laser emission signals; The data processing unit is arranged in the base frame (101).

10. A real-time monitoring method for strip thickness based on laser ranging, characterized in that: The steps include: Step 1: The transmission unit (2) transmits the steel strip (5) at a predetermined speed, so that the steel strip (5) is transmitted through the monitoring space of the laser monitoring unit (1); Step 2: The terminal of the mechanical detection component (301) of the second detection part (105) contacts the steel strip (5); during the transmission of the steel strip (5), the mechanical detection component (301) collects the expansion and contraction value of the mechanical detection component (301) caused by the convexity or concavity of the plane of the steel strip (5), and transmits the expansion and contraction value to the data processing unit for calculation, thereby obtaining the deformation error value of the steel strip (5); Step 3: The driving component (106) drives the first detection part (102) and the second detection part (105) to move from the initial end to the terminal end of the base frame (101). During this process, the moving speed of the first detection part (102) and the second detection part (105) is adjusted to be the same as the predetermined speed. The pressing component (302) is fixed on the strip steel (5), and the first detection part (102) performs detection. The first detection element simultaneously emits laser beams on the upper and lower surfaces of the steel strip (5), receives reflected light, converts the optical impact into an electrical signal through a charge coupled device, and transmits the electrical signal to a data processing unit for calculation; Step 4, calculating the distance between the upper surface and the lower surface of the steel strip (5) and the sensor, and calculating the thickness of the steel strip (5) through the distance between the two measured values ​​and the sensor; The calculation formula of the thickness of the strip steel (5) is: Strip steel (5) thickness = H-h1-h2 Where H is the distance between the two laser ranging sensors, h1 is the distance measured by the upper laser ranging sensor, and h2 is the distance measured by the lower laser ranging sensor; Step 5, determining whether the deformation error value in step 2 exceeds a set threshold value; when the deformation error value collected in step 2 exceeds the threshold value, calculating whether the error between the thickness dimension of the strip steel (5) and the initial thickness dimension is equal to the deformation error value, and if the calculated difference exceeds the tolerance range, the data processing unit sends an alarm signal; Step 6: If the deformation error value does not exceed the set threshold value, the driving component (106) drives the first detection part (102) and the second detection part (105) to move from the terminal end of the base frame (101) to the initial end to reset; Step 7: After the set distance has passed, steps 2 to 6 are repeated again until the transmission of the steel strip (5) is completed.

Images