A thickness monitoring system for float glass production

Abstract

This invention discloses a thickness monitoring system for float glass production, relating to the field of glass thickness monitoring technology. The invention includes a beam moving mechanism, a dual-beam emitting assembly, a photosensitive element array, and a thermal control condensation system. By setting a first and a second beam emitter to achieve reflection positioning and refraction thickness measurement respectively, combined with the first photosensitive element to form a dual-spot, the glass thickness is accurately calculated. A beam splitter and a reflector work together to achieve upper surface positioning, while the second photosensitive element is used to detect operational vibrations and provide fault warnings. The system is equipped with an electric cylinder to adjust the angle, ensuring stable beam pointing. The first photosensitive element is equipped with a cooling structure to effectively suppress thermal noise interference and improve measurement accuracy. It is suitable for thickness monitoring in high-strength continuous float glass production lines.

Description

Technical Field

[0001] This invention relates to the field of glass thickness monitoring technology, specifically a thickness monitoring system for float glass production. Background Technology

[0002] Currently, thickness monitoring systems in float glass production lines primarily rely on fixed-angle single-beam laser or ultrasonic ranging devices. These are typically positioned above the glass surface, with single, immovable monitoring points, failing to meet the demand for comprehensive, wide-area glass coverage inspection. During glass movement, existing systems struggle to dynamically track thickness changes at multiple locations in real time, creating blind spots. Furthermore, existing systems generally lack angle stability adjustment structures, making the beam angle susceptible to vibration interference and inaccuracies. Simultaneously, the photosensitive receiver generates thermal noise signals during prolonged operation, leading to decreased measurement accuracy. Additionally, if internal components such as rollers and bearings within the detection device age or fail, abnormal vibrations may occur during operation; however, traditional equipment lacks the ability to recognize these vibrations, easily resulting in misinterpretations of measurement results. In summary, existing monitoring equipment generally suffers from low accuracy, limited detection area, unstable operation, poor heat dissipation, and weak fault warning capabilities. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the present invention provides the following technical solution: a thickness monitoring system for float glass production, comprising a conveyor roller for supporting the horizontal movement of the glass, a crossbeam plate suspended above the conveyor roller perpendicular to the glass movement direction, and a monitoring unit slidably mounted on the crossbeam plate; the monitoring unit includes a reinforcing frame, a base plate fixedly mounted on the lower surface of the reinforcing frame, an evaporation chamber fixedly mounted on the base plate, a flat mounting plate fixedly mounted on the side of the evaporation chamber, a heat absorption chamber fixedly connected to the lower surface of the evaporation chamber, a first photosensitive element fixedly and sealed to the bottom of the heat absorption chamber, and two mutually fixed first and second light emitters movably mounted on the lower surface of the flat mounting plate through a light emitter bracket, the first and second light emitters emitting two parallel beams of light; the first photosensitive element is used to receive and monitor the light emitted by the first and second light emitters.

[0004] Preferably, two horizontal and parallel sliding guide rods are fixedly mounted on the crossbeam plate, and a driving friction strip is provided between the two sliding guide rods. The driving friction strip is fixed to the crossbeam plate. A sliding frame is slidably mounted on the two sliding guide rods, wherein the reinforcing frame is fixedly mounted on the sliding frame.

[0005] Preferably, a plurality of parallel heat-absorbing plates are fixedly installed on the side of the first photosensitive element facing the heat-absorbing chamber, and a condenser heat sink is fixedly and sealed on the evaporation chamber. The heat-absorbing chamber and the evaporation chamber are filled with electronic fluorinated liquid, the liquid level being lower than the bottom of the evaporation chamber and able to submerge the heat-absorbing plates. The condenser heat sink is provided with a plurality of parallel heat sink fins, each heat sink fin being hollow and communicating with the interior of the evaporation chamber.

[0006] Preferably, an electric cylinder is movably mounted on the flat mounting plate, and a swing arm is fixedly mounted at the movable connection between the first light emitter, the second light emitter, and the light emitter bracket via a rotating shaft (wherein the light emitter bracket is fixedly fitted to the flat mounting plate, and the light emitter bracket is movably fitted to the first light emitter and the second light emitter), so that the swing arm moves synchronously with the first light emitter and the second light emitter, and the end of the swing arm away from the second light emitter is movably connected to the end of the telescopic rod of the electric cylinder.

[0007] Preferably, a light-shielding tube is also fixedly installed on the flat mounting plate. The inner wall of the light-shielding tube is provided with multiple convex rings arranged in an array along its own axis for reflecting light inside the light-shielding tube. A second photosensitive element is fixedly installed on the top surface of the inner wall of the light-shielding tube, and a heat sink for the second photosensitive element is fixedly provided at the position of the top of the outer surface of the light-shielding tube aligned with the position of the second photosensitive element.

[0008] Preferably, the second photosensitive element is provided with an inclined reflective mirror located below the outside of the light-shielding tube. The reflective mirror is elastically mounted on a swing spring bracket via a swing spring. The swing spring bracket is fixedly mounted on a beam splitter bracket. The beam splitter bracket is fixedly mounted on a flat mounting plate. A beam splitter is also fixedly mounted on the beam splitter bracket. The beam splitter forms a 45-degree angle with the light emitted by the first light emitter. The beam splitter is used to split the light emitted by the first light emitter into two beams. One beam passes through the beam splitter and illuminates the glass surface to be monitored. The other beam is reflected by the beam splitter onto the reflective mirror, and the reflective mirror reflects the light onto the second photosensitive element.

[0009] Preferably, a drive pressure frame is fixedly installed on the reinforcing frame, and two parallel roller guide slides are slidably installed on the drive pressure frame. A roller frame is fixedly installed between the two roller guide slides, and a roller that rotatably engages with the drive friction strip is rotatably installed on the roller frame. A compression spring is arranged around each of the two roller guide slides, and the two ends of the compression spring are fixedly engaged with the roller frame and the drive pressure frame.

[0010] Preferably, a drive motor fixing beam is fixedly installed on the reinforcing frame and the drive pressure frame. The drive motor fixing beam is suspended above the condenser heat sink. A drive motor is fixedly installed on the drive motor fixing beam. A tension pulley bracket is also slidably installed on the drive pressure frame. A tension pulley is rotatably installed on the tension pulley bracket. The output shaft of the drive motor is connected to the pulley via a transmission belt. The tension pulley is used to tension the transmission belt. A tensioning rubber strip is elastically connected between the tension pulley bracket and one end of the top edge of the drive pressure frame. The tensioning rubber strip is used to pull the tension pulley bracket and the tension pulley to move away from the pulley.

[0011] Preferably, a rectangular through hole is provided in the middle of the base plate, and an ND filter is fixedly installed in the rectangular through hole in a way that is easy to disassemble. A protective cover is fixedly installed on the base plate in a way that is easy to disassemble. The side of the protective cover facing the crossbeam plate is open to facilitate the heat dissipation of the condenser heat sink and the heat sink of the second photosensitive element.

[0012] Compared with the prior art, the present invention has the following advantages: (1) The present invention combines dual-beam projection with multi-point photosensitive elements to dynamically monitor the thickness information at any position in the length and width directions of the glass during its movement. The first beam emitter achieves upper surface reflection distance measurement through the cooperation of a beam splitter and a reflective mirror to determine whether the glass has bulging deformation. The second beam emitter combines refraction and reflection dual-spot positioning to realize the geometric calculation of the overall thickness of the glass, thereby significantly improving the measurement accuracy and spatial resolution, and is suitable for continuous production lines of float glass; (2) The first and second beam emitters of the present invention are connected to an angular displacement sensor through a swing arm mechanism driven by an electric cylinder, which can sense the beam deviation caused by vibration or equipment drift during operation and automatically adjust the emitter angle to ensure that the light stably illuminates the target area; (3) The present invention, through The vibration detection mechanism composed of the reflective lens and the second photosensitive element can judge abnormal vibrations caused by aging or damage of rollers or bearings in real time, thereby identifying abnormal operating conditions of the equipment in advance; (4) By configuring a heat-absorbing sheet and a heat-absorbing chamber on the back of the photosensitive element, the present invention effectively reduces the thermal noise generated by the long-term operation of the photosensitive element, ensures that the photosensitive element is in the ideal temperature range during system operation, and improves the spot resolution and measurement consistency; (5) The monitoring part of the present invention adopts a combination of sliding guide rail and friction drive structure, which is convenient to slide along the crossbeam to different positions. Limit control is set at both ends of the crossbeam, and the system can move and scan in a Z-shape as needed. At the same time, the ND filter can effectively reduce the interference of external natural light on the photosensitive element. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structural layout of the present invention.

[0014] Figure 2 This is a schematic diagram of the overall structure of the present invention.

[0015] Figure 3 This is a schematic diagram of the structure of the roller in this invention.

[0016] Figure 4 This is a schematic diagram of the compression spring structure of the present invention.

[0017] Figure 5 This is a schematic diagram of the light-shielding tube structure of the present invention.

[0018] Figure 6 This is a schematic diagram of the structure of the beam splitter in this invention.

[0019] Figure 7 This is a schematic diagram of the structure of the heat-absorbing sheet in this invention.

[0020] In the diagram: 101-Crossbeam plate; 102-Sliding guide rod; 103-Drive friction strip; 104-Sliding frame; 105-Reinforcing frame; 106-Base plate; 107-ND filter; 108-Protective cover; 109-Drive motor fixing beam; 110-Drive pressure frame; 111-Roller frame; 112-Roller; 113-Compression spring; 114-Roller guide rod; 115-Transmission belt; 116-Tightening pulley; 117-Drive motor; 118-Tightening pulley bracket; 119-Tightening rubber strip; 120- Evaporation chamber; 121-Condensation heat sink; 122-Heat absorption chamber; 123-Heat absorption fin; 124-First photosensitive element; 125-Flat mounting plate; 126-Electric cylinder; 127-Swing arm; 128-Light emitter bracket; 129-First light emitter; 130-Second light emitter; 131-Beam splitter; 132-Second photosensitive element heat sink; 133-Second photosensitive element; 134-Light shield; 135-Reflecting mirror; 136-Oscillating spring; 137-Oscillating spring bracket; 138-Beam splitter bracket. Detailed Implementation

[0021] The following is in conjunction with the appendix Figures 1-7 The technical solution of the present invention will be further illustrated through specific embodiments.

[0022] This invention provides a thickness monitoring system for float glass production, including a conveyor roller for supporting the horizontal movement of the glass. A crossbeam plate 101 is suspended above the conveyor roller, perpendicular to the glass movement direction. A monitoring unit is slidably mounted on the crossbeam plate 101. The monitoring unit includes a reinforcing frame 105, a base plate 106 is fixedly installed on the lower surface of the reinforcing frame 105, an evaporation chamber 120 is fixedly suspended on the base plate 106, a flat mounting plate 125 is fixedly installed on the side of the evaporation chamber 120, a heat absorption chamber 122 is fixedly connected to the lower surface of the evaporation chamber 120, and a first photosensitive element 124 is fixedly and sealed to the bottom of the heat absorption chamber 122. Two mutually fixed first light emitters 129 and second light emitters 130 are movably mounted on the lower surface of the flat mounting plate 125 through a light emitter bracket 128. The first light emitters 129 and second light emitters 130 emit two parallel beams of light. The first photosensitive element 124 is used to receive and monitor the light emitted by the first light emitters 129 and second light emitters 130. Two horizontal and parallel sliding guide rods 102 are fixedly mounted on the crossbeam plate 101. A driving friction strip 103 is provided between the two sliding guide rods 102 and is fixed on the crossbeam plate 101. A sliding frame 104 is slidably mounted on the two sliding guide rods 102, and a reinforcing frame 105 is fixedly mounted on the sliding frame 104. Multiple parallel heat-absorbing plates 123 are fixedly mounted on the side of the first photosensitive element 124 facing the heat-absorbing chamber 122. A condensing heat sink 121 is fixedly and sealed on the evaporation chamber 120. Electronic fluorinated liquid is provided in the heat-absorbing chamber 122 and the evaporation chamber 120. The liquid level is lower than the bottom of the evaporation chamber 120 and can submerge the heat-absorbing plates 123. Multiple parallel heat dissipation fins are provided on the condensing heat sink 121. Each heat dissipation fin is hollow and communicates with the interior of the evaporation chamber 120. An electric cylinder 126 is movably mounted on a flat mounting plate 125. A swing arm 127 is fixedly mounted at the movable connection between the first light emitter 129, the second light emitter 130 and the light emitter bracket 128 via a rotating shaft (where the light emitter bracket 128 is fixedly fitted with the flat mounting plate 125, and the light emitter bracket 128 is movably fitted with the first light emitter 129 and the second light emitter 130), so that the swing arm 127 moves synchronously with the first light emitter 129 and the second light emitter 130. The end of the swing arm 127 away from the second light emitter 130 is movably connected to the end of the telescopic rod of the electric cylinder 126. A light-shielding tube 134 is also fixedly installed on the flat mounting plate 125. Multiple convex rings are arranged in an array along the axial direction on the inner wall of the light-shielding tube 134 for reflecting light inside the light-shielding tube 134. A second photosensitive element 133 is fixedly installed on the top surface of the inner wall of the light-shielding tube 134. A heat sink 132 for the second photosensitive element is fixedly installed at the top of the outer surface of the light-shielding tube 134, which is aligned with the position of the second photosensitive element 133.The second photosensitive element 133 is located below the outside of the light-shielding tube 134 and has an inclined reflective mirror 135. The reflective mirror 135 is elastically mounted on the swing spring bracket 137 via the swing spring 136. The swing spring bracket 137 is fixedly mounted on the beam splitter bracket 138. The beam splitter bracket 138 is fixedly mounted on the flat mounting plate 125. A beam splitter 131 is also fixedly mounted on the beam splitter bracket 138. The beam splitter 131 forms a 45-degree angle with the light emitted by the first light emitter 129. The beam splitter 131 is used to split the light emitted by the first light emitter 129 into two beams. One beam passes through the beam splitter 131 and illuminates the glass surface to be monitored. The other beam is reflected by the beam splitter 131 onto the reflective mirror 135. The reflective mirror 135 reflects the light onto the second photosensitive element 133.

[0023] A drive pressure frame 110 is fixedly installed on the reinforcing frame 105. Two parallel roller guide slides 114 are slidably installed on the drive pressure frame 110. A roller frame 111 is fixedly installed between the two roller guide slides 114. A roller 112 that rotatably engages with the drive friction strip 103 is rotatably installed on the roller frame 111. A compression spring 113 is arranged around each of the two roller guide slides 114. The two ends of the compression spring 113 are fixedly engaged with the roller frame 111 and the drive pressure frame 110. A drive motor fixing beam 109 is fixedly installed on the reinforcing frame 105 and the drive pressure frame 110. The drive motor fixing beam 109 is suspended above the condenser heat sink 121. A drive motor 117 is fixedly installed on the drive motor fixing beam 109. A tension pulley bracket 118 is also slidably installed on the drive pressure frame 110. A tension pulley 116 is rotatably installed on the tension pulley bracket 118. The output shaft of the drive motor 117 is connected to the roller 112 by a transmission belt 115. The tension pulley 116 is used to tension the transmission belt 115. A tensioning rubber strip 119 is elastically connected between the tension pulley bracket 118 and one end of the top edge of the drive pressure frame 110. The tensioning rubber strip 119 is used to pull the tension pulley bracket 118 and the tension pulley 116 to move away from the roller 112. A rectangular through hole is provided in the middle of the base plate 106. An ND filter 107 is fixedly installed in the rectangular through hole in a way that is easy to disassemble. A protective cover 108 is fixedly installed on the base plate 106 in a way that is easy to disassemble. The side of the protective cover 108 facing the crossbeam plate 101 is open to facilitate the heat dissipation of the condenser heat sink 121 and the second photosensitive element heat sink 132.

[0024] The working principle of the thickness monitoring system for float glass production disclosed in this invention is as follows: Glass coming off the production line is transported by conveyor rollers, and a crossbeam plate 101 is installed on the glass. The movement of the glass will cause relative movement with the protective cover 108, which is used to monitor the thickness of the glass at different positions in the length direction. To monitor the thickness at different positions in the width direction of the glass, the drive motor 117 needs to be started. The output shaft of the drive motor 117 drives the roller 112 to rotate through the transmission belt 115. The rotation of the roller 112 will roll on the drive friction strip 103, thereby causing the drive pressure frame 110, the reinforcing frame 105, and the reinforcing frame 105 to slide on the sliding guide rod 102. The sliding guide rod 102 is equipped with adjustable limit switches at both ends to control the rotation direction of the output shaft of the drive motor 117, so that the entire protective cover 108 reciprocates linearly on the sliding guide rod 102 (the higher the frequency of reciprocating motion, the greater the monitoring density; generally, a Z-shaped monitoring is sufficient).

[0025] The monitoring process involves emitting a beam of light angled towards the upper surface of the glass using a second light emitter 130 and a first light emitter 129, allowing both beams to illuminate and pass through the glass. The light emitted by the first light emitter 129 is split into two beams by a beam splitter 131. One beam illuminates the monitored glass surface and is then reflected by the glass surface to the first photosensitive element 124, where it is received. This process is used to determine the distance between the upper surface of the glass and the lower surface of the ND filter 107 (or other components; since the relative positions are fixed, the ND filter 107 is used as a reference). Specifically, if the upper surface of the glass moves upward (due to convex deformation or changes in thickness), the reflection point of the light emitted by the first light emitter 129 on the upper surface of the glass will change, thus causing a change in the position of the light spot received on the first photosensitive element 124 (since the distance between each pixel on the first photosensitive element 124 is fixed, this can be determined by monitoring the light spot at the corresponding pixel position). The light reflected by the beam splitter 131 is reflected by the reflector 135 and then shines on the second photosensitive element 133. As the equipment operates, the bearings inside some rotating parts (bearings are installed in all rotating parts) may be damaged, such as the bearing balls falling off. This will cause the protective cover 108 to vibrate during movement. Due to the weight of the reflector 135 itself, the reflector 135 will swing on the swing spring 136. This will cause the light spot received by the second photosensitive element 133 to swing. At this time, the specific situation of the fault can be determined by the change frequency of the light signal received by the position of the pixel on the second photosensitive element 133 (the cause of the fault can be roughly predicted by the vibration state). At the end position of the reciprocating motion of the protective cover 108, the reflector 135 will also swing due to the acceleration. However, the frequency of this swing is different from the frequency when the fault occurs. Therefore, the frequency of the swing of the reflector 135 at the corresponding movement speed of the protective cover 108 is filtered out. Since the whole system is in motion, the second light emitter 130 and the first light emitter 129 are set to have adjustable angles on the light emitter bracket 128. An angular displacement sensor is set at the connection between the light emitter bracket 128 and the second light emitter 130 and the first light emitter 129 to monitor the angle information of the first light emitter 129 and the second light emitter 130 on the light emitter bracket 128. The electric cylinder 126 is used to adjust the angle so that it remains constant (the electric cylinder 126 does not work under normal operating conditions, and the extension rod of the electric cylinder 126 has a self-locking function).

[0026] The light emitted by the second light emitter 130 directly illuminates the upper surface of the glass. After reflection from the upper surface of the second light emitter 130, the reflected light illuminates the first photosensitive element 124, forming a light spot on the first photosensitive element 124. Simultaneously, the light emitted by the second light emitter 130 enters the interior of the glass and is refracted inside the glass. When the refracted light exits from the interior of the glass downwards, it is reflected inside the glass. The reflected light then passes through the upper surface of the glass from the interior of the glass and is refracted again before illuminating the first photosensitive element 124, forming a light spot on the first photosensitive element 124. At this point, two light spots corresponding to those emitted by the second light emitter 130 are formed on the first photosensitive element 124. The distance between the two light spots is determined by the distance between the pixels, and the thickness of the glass can be calculated through geometric operations. The first photosensitive element 124 generates thermal noise during prolonged operation, thus requiring cooling. A heat-absorbing sheet 123 is installed on the back of the first photosensitive element 124. The heat-absorbing sheet 123 absorbs the heat from the first photosensitive element 124 and transfers it to the electronic fluorinated liquid inside the heat-absorbing chamber 122, causing the fluorinated liquid to evaporate. The evaporated electronic fluorinated liquid condenses on the condensing heat sink 121 and falls back into the heat-absorbing chamber 122 under gravity (the condensing heat sink 121, evaporation chamber 120, and heat-absorbing chamber 122 are set under negative pressure). To improve heat dissipation efficiency, a convection fan can be added to the condensing heat sink 121 to increase airflow speed. The protective cover 108 has many gaps, and its movement causes relative movement between the air and the condensing heat sink 121 (or through holes can be opened on the surface of the protective cover 108).

Claims

1. A thickness monitoring system for float glass production, comprising conveyor rollers for supporting the horizontal movement of the glass, characterized in that: A crossbeam plate (101) is suspended above the conveyor roller, perpendicular to the direction of glass movement, and a monitoring unit is slidably mounted on the crossbeam plate (101); The monitoring unit includes a reinforcing frame (105), a base plate (106) is fixedly installed on the lower surface of the reinforcing frame (105), an evaporation chamber (120) is fixedly mounted on the base plate (106), a flat mounting plate (125) is fixedly installed on the side of the evaporation chamber (120), a heat absorption chamber (122) is fixedly connected to the lower surface of the evaporation chamber (120), a first photosensitive element (124) is fixedly and sealed to the bottom of the heat absorption chamber (122), and two mutually fixed first light emitters (129) and second light emitters (130) are movably mounted on the lower surface of the flat mounting plate (125) through a light emitter bracket (128). The first light emitter (129) and the second light emitter (130) emit two parallel beams of light; the first photosensitive element (124) is used to receive and monitor the light emitted by the first light emitter (129) and the second light emitter (130); A light-shielding tube (134) is also fixedly mounted on the flat mounting plate (125). Multiple convex rings are arranged in an array along the inner wall of the light-shielding tube (134) to reflect light inside the tube. A second photosensitive element (133) is fixedly mounted on the top surface of the inner wall of the light-shielding tube (134). A heat sink (132) for the second photosensitive element is fixedly mounted at a position aligned with the top of the outer surface of the light-shielding tube (134) with the second photosensitive element (133). A reflective mirror (135) is arranged at an angle below the second photosensitive element (133) outside the light-shielding tube (134). The reflective mirror (135) is elastically mounted on a swing spring bracket (136) via a swing spring (136). 7) The swing spring bracket (137) is fixedly installed on the beam splitter bracket (138), the beam splitter bracket (138) is fixedly installed on the flat mounting plate (125), and the beam splitter bracket (138) is also fixedly installed on the beam splitter bracket (138). The beam splitter (131) forms a 45-degree angle with the light emitted by the first light emitter (129). The beam splitter (131) is used to split the light emitted by the first light emitter (129) into two beams. One beam passes through the beam splitter (131) and illuminates the glass surface to be monitored. The other beam is reflected by the beam splitter (131) onto the reflector (135). The reflector (135) reflects the light onto the second photosensitive element (133).

2. The thickness monitoring system for float glass production according to claim 1, characterized in that: Two horizontal and parallel sliding guide rods (102) are fixedly mounted on the crossbeam plate (101). A driving friction strip (103) is provided between the two sliding guide rods (102) and the driving friction strip (103) is fixed on the crossbeam plate (101). A sliding frame (104) is slidably mounted on the two sliding guide rods (102), wherein a reinforcing frame (105) is fixedly mounted on the sliding frame (104).

3. The thickness monitoring system for float glass production according to claim 2, characterized in that: The first photosensitive element (124) has multiple parallel heat-absorbing plates (123) fixedly installed on the side facing the heat-absorbing chamber (122). A condenser heat sink (121) is fixedly and sealed on the evaporation chamber (120). Electronic fluorinated liquid is provided in the heat-absorbing chamber (122) and the evaporation chamber (120). The liquid level is lower than the bottom of the evaporation chamber (120) and can submerge the heat-absorbing plates (123). The condenser heat sink (121) has multiple parallel heat sink fins. Each heat sink fin is hollow and communicates with the interior of the evaporation chamber (120).

4. The thickness monitoring system for float glass production according to claim 3, characterized in that: An electric cylinder (126) is movably mounted on a flat mounting plate (125). A swing arm (127) is fixedly mounted at the movable connection between the first light emitter (129), the second light emitter (130) and the light emitter bracket (128) via a rotating shaft, so that the swing arm (127) moves synchronously with the first light emitter (129) and the second light emitter (130). The end of the swing arm (127) away from the second light emitter (130) is movably connected to the end of the telescopic rod of the electric cylinder (126).

5. The thickness monitoring system for float glass production according to claim 4, characterized in that: A drive pressure frame (110) is fixedly installed on the reinforcing frame (105). Two parallel roller guide slides (114) are slidably installed on the drive pressure frame (110). A roller frame (111) is fixedly installed between the two roller guide slides (114). A roller (112) that is rotatably installed on the roller frame (111) and is in frictional rolling cooperation with the drive friction strip (103) is mounted on the roller frame (111). A compression spring (113) is arranged around each of the two roller guide slides (114). The two ends of the compression spring (113) are fixedly cooperated with the roller frame (111) and the drive pressure frame (110).

6. The thickness monitoring system for float glass production according to claim 5, characterized in that: A drive motor fixing beam (109) is fixedly installed on the reinforcing frame (105) and the drive pressure frame (110). The drive motor fixing beam (109) is suspended above the condenser heat sink (121). A drive motor (117) is fixedly installed on the drive motor fixing beam (109). A tension pulley bracket (118) is also slidably installed on the drive pressure frame (110). A tension pulley (116) is rotatably installed on the tension pulley bracket (118). The output shaft of (117) is connected to the roller (112) by a transmission belt (115), wherein the tension pulley (116) is used to tension the transmission belt (115), and a tensioning rubber strip (119) is elastically connected between the tension pulley bracket (118) and one end of the top edge of the drive pressure frame (110). The tensioning rubber strip (119) is used to pull the tension pulley bracket (118) and the tension pulley (116) to move away from the roller (112).

7. The thickness monitoring system for float glass production according to claim 6, characterized in that: A rectangular through hole is provided in the middle of the base plate (106). An ND filter (107) is fixedly installed in the rectangular through hole in a way that is easy to disassemble. A protective cover (108) is fixedly installed on the base plate (106) in a way that is easy to disassemble. The side of the protective cover (108) facing the crossbeam plate (101) is open to facilitate the heat dissipation of the condenser heat sink (121) and the second photosensitive element heat sink (132).

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