Thickness monitoring system for float glass production

Abstract

The invention discloses a thickness monitoring system for float glass production, and relates to the technical field of glass thickness monitoring. The device comprises a cross beam moving mechanism, a double-light-ray emitting assembly, a photosensitive element array and a thermal control condensation system. The first light emitter and the second light emitter are arranged to achieve reflection positioning and refraction thickness measurement respectively, double light spots are formed in combination with the first photosensitive element, and the thickness of the glass is accurately calculated; the spectroscope is matched with the reflective mirror to realize upper surface positioning, and the second photosensitive element is used for identifying operation vibration and realizing fault early warning. The system is provided with an electric cylinder adjusting angle to ensure stable light beam pointing. The first photosensitive element is provided with a cooling structure, thermal noise interference is effectively suppressed, and the measurement precision is improved. The method is suitable for thickness monitoring of a high-strength continuous float glass production line.

Description

Technical Field

[0001] The present invention relates to the technical field of glass thickness monitoring, in particular to a thickness monitoring system for float glass production. Background Art

[0002] Currently, thickness monitoring systems in float glass production lines primarily rely on fixed-angle, single-beam laser or ultrasonic ranging devices, typically positioned above the glass surface. These devices, with a single, immovable monitoring point, cannot meet the requirements for full-coverage inspection of wide glass surfaces. As the glass moves, existing systems struggle to dynamically track thickness changes at multiple locations in real time, resulting in blind spots. Furthermore, existing systems generally lack an angle stability adjustment mechanism, making the beam angle susceptible to vibration interference and misalignment. Furthermore, long-term operation of the photosensitive receiver generates thermal noise, reducing measurement accuracy. Furthermore, if components such as rollers and bearings within the detection device body age and become damaged, abnormal vibrations may occur during operation. However, conventional equipment lacks the ability to detect vibration states, making it prone to misjudgment of measurement results. In summary, existing monitoring equipment generally suffers from low accuracy, limited detection ranges, unstable operation, poor heat dissipation, and weak fault warning capabilities. Summary of the Invention

[0003] In order to overcome the defects of the above-mentioned prior art, the present invention provides the following technical solutions: A thickness monitoring system for float glass production, comprising a conveying roller for supporting the horizontal movement of glass, a crossbeam plate is arranged above the conveying roller perpendicular to the moving direction of the glass, and a monitoring unit is slidably provided on the crossbeam plate; the monitoring unit comprises a reinforcement frame, a bottom plate is fixedly mounted on the lower surface of the reinforcement frame, an evaporation chamber is fixedly mounted on the bottom plate, a flat mounting plate is fixedly mounted on the side of the evaporation chamber, a heat absorption chamber is fixedly connected to the lower surface of the evaporation chamber, a first photosensitive element is fixedly and sealedly connected to the bottom of the heat absorption chamber, and two mutually fixed first and second light emitters are movably mounted on the lower surface of the flat mounting plate through a light emitter bracket, and the first and second light emitters emit two beams of parallel 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 provided on the crossbeam plate, a driving friction strip is provided between the two sliding guide rods, and the driving friction strip is fixed on the crossbeam plate; a sliding frame is slidably installed on the two sliding guide rods, wherein the reinforcement frame is fixedly installed on the sliding frame.

[0005] Preferably, a plurality of parallel heat-absorbing sheets are fixedly mounted on one side of the first photosensitive element facing the heat-absorbing chamber, and a condensation heat sink is fixedly and sealedly mounted on the evaporation chamber, wherein electronic fluorine liquid is arranged in the heat-absorbing chamber and the evaporation chamber, and the liquid level is lower than the bottom of the evaporation chamber and can cover the heat-absorbing sheet; wherein the condensation heat sink is provided with a plurality of parallel heat-dissipating fins, and each heat-dissipating fin adopts a hollow setting connected to the interior of the evaporation chamber.

[0006] Preferably, an electric cylinder is movably mounted on the planar 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 matched with the planar mounting plate, and the light emitter bracket is movably matched with 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 mounted on the flat mounting plate, and the inner wall of the light-shielding tube is provided with a plurality of convex rings along its own axial array for reflecting light inside the light-shielding tube; a second photosensitive element is fixedly mounted on the top surface of the inner wall of the light-shielding tube, and a second photosensitive element heat sink is fixedly provided at a position where the top of the outer surface of the light-shielding tube is aligned with the second photosensitive element.

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

[0009] Preferably, a driving pressure frame is fixedly mounted on the reinforcing frame, two parallel roller guide slides are slidably mounted on the driving pressure frame, a roller frame is fixedly mounted between the two roller guide slides, and a roller is rotatably mounted on the roller frame for frictionally rolling with the driving friction strip; an extrusion spring is arranged around both roller guide slides, and both ends of the extrusion spring are fixedly fitted with the roller frame and the driving pressure frame.

[0010] Preferably, a driving motor fixing beam is fixedly installed on the reinforcement frame and the driving pressure frame, the driving motor fixing beam is suspended above the condensing heat sink, the driving motor is fixedly installed on the driving motor fixing beam, and a tensioning pulley bracket is also slidably installed on the driving pressure frame, and a tensioning pulley is rotatably installed on the tensioning pulley bracket. The output shaft of the driving motor and the roller are connected through a transmission belt, wherein the tensioning pulley is used to tighten the transmission belt, and a tensioning rubber strip is elastically connected between the tensioning pulley bracket and one end of the top edge of the driving pressure frame, and the tensioning rubber strip is used to pull the tensioning pulley bracket and the tensioning pulley to move in a direction away from the roller.

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

[0012] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention can dynamically monitor the thickness information of any position in the length and width directions of the glass during its movement by combining dual-beam projection with multi-point photosensitive elements. The first light emitter realizes upper surface reflection ranging through the cooperation of a spectroscope and a reflective lens, which is used to determine whether the glass has convex deformation. The second light emitter combines refraction and reflection dual spot positioning to realize geometric calculation of the overall thickness of the glass, thereby significantly improving the measurement accuracy and spatial resolution, and is suitable for float glass continuous production lines; (2) The first and second light emitters of the present invention are connected to the 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 irradiates the target area; (3) The present invention realizes The vibration detection mechanism composed of the reflective lens and the second photosensitive element can judge in real time the abnormal vibration caused by the aging or damage of the roller or bearing, thereby identifying the abnormal working condition of the equipment in advance; (4) The present invention effectively reduces the thermal noise generated by the long-term operation of the photosensitive element by configuring a heat absorption plate and a heat absorption chamber on the back of the photosensitive element, ensuring that the photosensitive element is in the ideal temperature range during the operation of the system, and improving the spot resolution and measurement consistency; (5) The monitoring part of the present invention adopts a combination of sliding guide rails and friction drive structures to facilitate sliding to different positions along the beam. The two ends of the beam are set with limit controls, 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. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0015] Figure 3 It is a structural schematic diagram of the roller of the present invention.

[0016] Figure 4 It is a structural schematic diagram of the extrusion spring of the present invention.

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

[0018] Figure 6 It is a structural schematic diagram of the spectroscope of the present invention.

[0019] Figure 7 It is a structural schematic diagram of the heat absorbing plate of the present invention.

[0020] In the figure: 101- crossbeam plate; 102- sliding guide rod; 103- driving friction strip; 104- sliding frame; 105- reinforcing frame; 106- bottom plate; 107- ND filter; 108- protective cover; 109- driving motor fixing beam; 110- driving pressure frame; 111- roller frame; 112- roller; 113- extrusion spring; 114- roller guide slide; 115- driving belt; 116- tension pulley; 117- driving motor; 118- tension pulley bracket; 119- tension rubber strip; 120- Evaporation chamber; 121-condensation heat sink; 122-heat absorption chamber; 123-heat absorption plate; 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-shielding tube; 135-reflective lens; 136-swing spring; 137-swing spring bracket; 138-beam splitter bracket. DETAILED DESCRIPTION

[0021] The following is combined with Figure 1-Figure 7 , and further illustrate the technical solution of the present invention through specific implementation methods.

[0022] The present invention provides a thickness monitoring system for float glass production, comprising a conveyor roller for supporting the horizontal movement of glass. A crossbeam 101 is overhead mounted above the conveyor roller, perpendicular to the direction of glass movement. A monitoring unit is slidably mounted on the crossbeam 101. The monitoring unit comprises a reinforcement frame 105. A bottom plate 106 is fixedly mounted on the lower surface of the reinforcement frame 105. An evaporation chamber 120 is overhead and fixedly mounted on the bottom plate 106. A planar mounting plate 125 is fixedly mounted 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 sealedly connected to the bottom of the heat absorption chamber 122. Two mutually fixed first and second light emitters 129 and 130 are movably mounted on the lower surface of the planar mounting plate 125 via a light emitter bracket 128. The first and second light emitters 129 and 130 emit two parallel light beams. The first photosensitive element 124 is used to receive and monitor the light emitted by the first and second light emitters 129 and 130. Two horizontal, parallel sliding guide rods 102 are fixedly mounted on the crossbeam 101. A driving friction strip 103 is disposed between the two sliding guide rods 102 and fixed to the crossbeam 101. A sliding frame 104 is slidably mounted on the two sliding guide rods 102, with a reinforcement frame 105 fixedly mounted on the sliding frame 104. A plurality of parallel heat-absorbing fins 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 sealedly mounted on the evaporation chamber 120. The heat-absorbing and evaporation chambers 122 and 120 contain electronic fluoride liquid, with the liquid level below the bottom of the evaporation chamber 120 and sufficient to cover the heat-absorbing fins 123. The condensing heat sink 121 is equipped with a plurality of parallel heat-dissipating fins, each of which has a hollow structure that communicates with the interior of the evaporation chamber 120. An electric cylinder 126 is movably mounted on the planar mounting plate 125, and a swing arm 127 is fixedly mounted on the movable connection between the first light emitter 129, the second light emitter 130 and the light emitter bracket 128 via a rotating shaft (wherein the light emitter bracket 128 is fixedly matched with the planar mounting plate 125, and the light emitter bracket 128 is movably matched with the first light emitter 129, the second light emitter 130), so that the swing arm 127 moves synchronously with the first light emitter 129, the second light emitter 130, and 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 mounted on the planar mounting plate 125. The inner wall of the light-shielding tube 134 is provided with a plurality of convex rings along its own axial array for reflecting light inside the light-shielding tube 134. A second photosensitive element 133 is fixedly mounted on the top surface of the inner wall of the light-shielding tube 134. A second photosensitive element heat sink 132 is fixedly provided at a position where the top of the outer surface of the light-shielding tube 134 is aligned with the second photosensitive element 133.The second photosensitive element 133 is located below the outside of the light-shielding tube 134 and is provided with an inclined reflective lens 135. The reflective lens 135 is elastically mounted on the swing spring bracket 137 through a swing spring 136. The swing spring bracket 137 is fixedly mounted on the spectrometer bracket 138. The spectrometer bracket 138 is fixedly mounted on the flat mounting plate 125. A spectrometer 131 is also fixedly mounted on the spectrometer bracket 138. The spectrometer 131 and the light emitted by the first light emitter 129 form a forty-five-degree angle. The spectrometer 131 is used to split the light emitted by the first light emitter 129 into two beams, one of which passes through the spectrometer 131 and irradiates the glass surface to be monitored, and the other beam is reflected by the spectrometer 131 onto the reflective lens 135. The reflective lens 135 reflects the light onto the second photosensitive element 133.

[0023] A driving pressure frame 110 is fixedly mounted on the reinforcing frame 105, and two parallel roller guide slides 114 are slidably mounted on the driving pressure frame 110. A roller frame 111 is fixedly mounted between the two roller guide slides 114, and a roller 112 is rotatably mounted on the roller frame 111, which is in friction and rolling cooperation with the driving friction strip 103; an extrusion spring 113 is arranged around the two roller guide slides 114, and the two ends of the extrusion spring 113 are fixedly cooperated with the roller frame 111 and the driving pressure frame 110. A driving motor fixed beam 109 is fixedly installed on the reinforcement frame 105 and the driving pressure frame 110. The driving motor fixed beam 109 is suspended above the condensing heat sink 121. A driving motor 117 is fixedly installed on the driving motor fixed beam 109. A tensioning pulley bracket 118 is also slidably installed on the driving pressure frame 110. A tensioning pulley 116 is rotatably installed on the tensioning pulley bracket 118. The output shaft of the driving motor 117 is connected to the roller 112 through a transmission belt 115, wherein the tensioning pulley 116 is used to tighten the transmission belt 115. A tensioning rubber strip 119 is elastically connected between the tensioning pulley bracket 118 and one end of the top edge of the driving pressure frame 110. The tensioning rubber strip 119 is used to pull the tensioning pulley bracket 118 and the tensioning pulley 116 to move in a direction away from the roller 112. A rectangular through hole is provided in the middle of the base plate 106, in which an ND filter 107 is fixedly installed in a manner that is easy to disassemble. A protective cover 108 is fixedly installed on the base plate 106 in a manner that is easy to disassemble. The side of the protective cover 108 facing the crossbeam plate 101 is open to facilitate heat dissipation of the condensation heat sink 121 and the second photosensitive element heat sink 132.

[0024] The operating principle of a thickness monitoring system for float glass production disclosed herein is as follows: Glass coming off the production line is transported by conveyor rollers, and a crossbeam 101 is mounted on the glass. The movement of the glass causes relative movement with a protective cover 108, which is used to monitor the thickness of the glass at different locations along its length. Monitoring the thickness of different locations along its width requires activating a drive motor 117. The output shaft of the drive motor 117 rotates a roller 112 via a transmission belt 115. The rotation of the roller 112 rolls on a drive friction strip 103, causing the pressure frame 110, the reinforcement frame 105, and the reinforcement frame 105 to slide on a sliding guide rod 102. Adjustable limit switches are installed at both ends of the sliding guide rod 102 to control the rotation direction of the output shaft of the drive motor 117, causing the protective cover 108 to move back and forth linearly on the sliding guide rod 102. (The higher the frequency of the reciprocating motion, the greater the monitoring density; a zigzag pattern is generally sufficient for monitoring.)

[0025] The monitoring process involves the second light emitter 130 and the first light emitter 129 emitting a single light beam obliquely directed toward the top surface of the glass. Both beams 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 strikes the monitored glass surface, then reflects off the glass surface and reaches the first photosensitive element 124, where it is detected. This process is used to determine the distance between the top surface of the glass and the bottom surface of the neutral density filter 107 (or other components, as their relative positions are fixed; the neutral density filter 107 is used as a reference here). Specifically, if the top surface of the glass moves upward (due to convex deformation or thickness changes), the reflection point of the light emitted by the first light emitter 129 on the top surface of the glass will change, causing the position of the light spot detected by the first photosensitive element 124 to change. (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.) The light reflected by the beam splitter 131 will be reflected by the reflective lens 135 and then illuminate the second photosensitive element 133. As the equipment operates, the bearings inside some rotating parts (all rotating parts are equipped with bearings) may be damaged, such as the bearing balls falling off. At this time, the protective cover 108 will shake during movement. Due to the weight of the reflective lens 135 itself, the reflective lens 135 will swing on the swing spring 136, which will cause the light spot received by the second photosensitive element 133 to shake. At this time, the specific situation of the fault can be determined by the frequency change of the light signal received by the position of the pixel point on the second photosensitive element 133 (the cause of the fault can be roughly predicted by the vibration state. At the end point position of the overall reciprocating motion of the protective cover 108, due to the acceleration, the reflective lens 135 will also shake, but the shaking frequency is different from the frequency during the fault. Therefore, the frequency of the shaking of the reflective lens 135 at the corresponding movement speed of the protective cover 108 is filtered out). Since the whole is in a state of 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 provided 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, and to adjust the angles through the electric cylinder 126 so that the angles remain unchanged (the electric cylinder 126 does not work under normal working conditions, and the telescopic rod of the electric cylinder 126 has a self-locking function).

[0026] The light emitted by the second light emitter 130 will directly illuminate the upper surface of the glass, and then after being reflected by the upper surface of the second light emitter 130, the reflected light will illuminate the first photosensitive element 124, forming a light spot on the first photosensitive element 124. At the same time, the light emitted by the second light emitter 130 will be absorbed into the interior of the glass and refracted inside the glass. When the refracted light is emitted from the inside of the glass to the bottom of the glass, it will be reflected inside the glass. The reflected light will pass through the upper surface of the glass from the inside of the glass and refract again, and then illuminate the first photosensitive element 124, forming a light spot on the first photosensitive element 124. At this time, two light spots corresponding to the light emitted by the second light emitter 130 will be formed on the first photosensitive element 124. The distance between the two light spots is obtained by the distance between the pixel points, and the thickness of the glass can be obtained by geometric calculations. The first photosensitive element 124 generates thermal noise when operating for extended periods of time, so cooling the first photosensitive element 124 is necessary. A heat-absorbing sheet 123 is disposed 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 fluoride liquid within the heat absorption chamber 122, causing the liquid to evaporate. The evaporated electronic fluoride liquid condenses on the condensation heat sink 121, and the condensed electronic fluoride liquid falls back into the heat absorption chamber 122 under the action of gravity (negative pressure is employed within the condensation heat sink 121, evaporation chamber 120, and heat absorption chamber 122). To improve heat dissipation efficiency, a convection fan can be installed on the condensation heat sink 121 to increase air flow. The protective cover 108 has numerous gaps, and movement of the protective cover 108 also causes relative movement between the air and the condensation heat sink 121 (or, alternatively, through-holes can be provided on the surface of the protective cover 108).

Claims

1. A thickness monitoring system for float glass production, comprising a conveyor roller for supporting the horizontal movement of glass, characterized in that: A crossbeam plate (101) is overhead and perpendicular to the moving direction of the glass above the conveying roller, and a monitoring unit is slidably provided on the crossbeam plate (101); The monitoring unit includes a reinforcement frame (105), a bottom plate (106) is fixedly mounted on the lower surface of the reinforcement frame (105), an evaporation chamber (120) is fixedly mounted on the bottom plate (106), a plane mounting plate (125) is fixedly mounted 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 sealed and connected 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 plane mounting plate (125) through a light emitter bracket (128), the first light emitter (129) and the second light emitter (130) emit two parallel light beams; 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).

2. A thickness monitoring system for float glass production according to claim 1, characterized in that: Two horizontal and mutually parallel sliding guide rods (102) are fixedly provided 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 reinforcement 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: A plurality of parallel heat-absorbing fins (123) are fixedly mounted on one side of the first photosensitive element (124) facing the heat-absorbing chamber (122), and a condensation heat sink (121) is fixedly and sealedly mounted on the evaporation chamber (120), wherein electronic fluoride liquid is disposed in the heat-absorbing chamber (122) and the evaporation chamber (120), and the liquid level is lower than the bottom of the evaporation chamber (120) and can cover the heat-absorbing fin (123); wherein a plurality of parallel heat-dissipating fins are disposed on the condensation heat sink (121), and each heat-dissipating fin is hollow and communicates with the interior of the evaporation chamber (120).

4. A thickness monitoring system for float glass production according to claim 3, characterized in that: An electric cylinder (126) is movably mounted on the flat mounting plate (125), and a swing arm (127) is fixedly mounted on a 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), and an 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 light-shielding cylinder (134) is also fixedly mounted on the plane mounting plate (125), and a plurality of convex rings are arranged on the inner wall of the light-shielding cylinder (134) along its own axial array for reflecting light inside the light-shielding cylinder (134); a second photosensitive element (133) is fixedly mounted on the top surface of the inner wall of the light-shielding cylinder (134), and a second photosensitive element heat sink (132) is fixedly provided at a position where the top of the outer surface of the light-shielding cylinder (134) is aligned with the second photosensitive element (133).

6. The thickness monitoring system for float glass production according to claim 5, characterized in that: The second photosensitive element (133) is located below the outside of the light-shielding tube (134) and is provided with an inclined reflective lens (135). The reflective lens (135) is elastically mounted on a swing spring bracket (137) through a swing spring (136). The swing spring bracket (137) is fixedly mounted on a spectroscope bracket (138). The spectroscope bracket (138) is fixedly mounted on a flat mounting plate (125). A spectroscope bracket (138) is also fixedly mounted on the spectroscope bracket (138). The beam splitter (131) and the light emitted by the first light emitter (129) form an angle of forty-five degrees. The beam splitter (131) is used to split the light emitted by the first light emitter (129) into two beams, one of which passes through the beam splitter (131) and irradiates the glass surface to be monitored, and the other beam is reflected by the beam splitter (131) onto the reflective lens (135), and the reflective lens (135) reflects the light onto the second photosensitive element (133).

7. The thickness monitoring system for float glass production according to claim 6, characterized in that: A driving pressure frame (110) is fixedly mounted on the reinforcing frame (105), two parallel roller guide slide bars (114) are slidably mounted on the driving pressure frame (110), a roller frame (111) is fixedly mounted between the two roller guide slide bars (114), and a roller (112) is rotatably mounted on the roller frame (111) for frictionally rolling with the driving friction strip (103); an extrusion spring (113) is arranged around each of the two roller guide slide bars (114), and both ends of the extrusion spring (113) are fixedly matched with the roller frame (111) and the driving pressure frame (110).

8. The thickness monitoring system for float glass production according to claim 7, characterized in that: A driving motor fixed beam (109) is fixedly mounted on the reinforcing frame (105) and the driving pressure frame (110). The driving motor fixed beam (109) is suspended above the condensing heat sink (121). A driving motor (117) is fixedly mounted on the driving motor fixed beam (109). A tensioning pulley bracket (118) is also slidably mounted on the driving pressure frame (110). A tensioning pulley (116) is rotatably mounted on the tensioning pulley bracket (118). The driving motor The output shaft of (117) is connected to the roller (112) via a transmission belt (115), wherein the tensioning pulley (116) is used to tighten the transmission belt (115), and a tensioning rubber strip (119) is elastically connected between the tensioning pulley bracket (118) and one end of the top edge of the driving pressure frame (110), and the tensioning rubber strip (119) is used to pull the tensioning pulley bracket (118) and the tensioning pulley (116) to move in a direction away from the roller (112).

9. The thickness monitoring system for float glass production according to claim 8, characterized in that: A rectangular through hole is provided in the middle of the bottom plate (106), and an ND filter (107) is fixedly installed in the rectangular through hole in a manner that is easy to disassemble. A protective cover (108) is fixedly installed on the bottom plate (106) in a manner that is easy to disassemble. The side of the protective cover (108) facing the crossbeam plate (101) is open to facilitate heat dissipation of the condensation heat sink (121) and the second photosensitive element heat sink (132).

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