A glass liquid level measuring device and method based on visual measurement technology

Abstract

The application discloses a glass liquid level measuring device and method based on visual measurement technology, which comprises a cooling protection device, a lens temperature protection control device, a data acquisition and analysis device, a liquid level measuring algorithm and an installation auxiliary device; the cooling protection device comprises a protection sleeve which is provided in a hollow cylinder structure. The glass liquid level measuring device and method based on visual measurement technology adopt a novel structure design, so that the device can shoot the glass liquid level in a kiln by using a visual camera during use, and then the actual height of the liquid level is calculated by using a proportional conversion method, so that the purpose of continuously measuring the liquid level height is achieved. When in use, the internal camera and lens are cooled by air cooling and water cooling, so that damage of the device caused by high temperature is avoided. When the temperature of the equipment is abnormal, the electric sliding block is used to store the equipment in the storage groove, and the cooling nozzle is used for emergency cooling, so that the device is further protected from damage.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of glass fiber kiln control, in particular to a glass liquid level measuring device and method based on visual measurement technology. BACKGROUND

[0002] The glass fiber kiln is the main thermal equipment for glass fiber production, and the glass liquid level height in the kiln needs to be measured during the production process. Due to its high temperature characteristics, the traditional glass fiber tank kiln glass liquid level measurement generally has two ways, namely contact measurement and non-contact measurement.

[0003] However, in actual use, the contact measurement (such as the prior art, a glass melting furnace liquid level measuring device is disclosed in Chinese patent CN207675262U, which belongs to the technical field of glass production. The glass melting furnace liquid level measuring device comprises a supporting plate and a measuring tool. The supporting plate is arranged on the pool wall brick, and the upper end surface of the supporting plate is arranged horizontally and is 3-10mm higher than the lower end of the measuring port. The measuring tool comprises a supporting rod and a measuring rod. The measuring tool can pass through the measuring port and does not contact the inner wall of the measuring port, so as to avoid the glass liquid sticking to the inner wall of the measuring port. During measurement, the measuring tool is placed on the supporting plate. After measurement, the glass liquid on the supporting plate can be easily cleaned or the supporting plate can be directly replaced, so as to ensure the horizontal placement and the accuracy of the placement height of the measuring tool. The glass liquid residue on the measuring port will not affect the measurement accuracy. The utility model has the advantages of simple structure, easy operation, accurate and rapid measurement of liquid level height, and stable glass liquid surface. The structure of the above-mentioned device needs to be placed into the kiln for measurement, and the data needs to be taken out for reading, so that the overall measurement process is discontinuous, and it is not convenient to obtain real-time measurement data.

[0004] Contact measurement (such as the prior art, disclosed in the Chinese patent with the publication number CN211527548U, a sealed rod type laser liquid level meter, the utility model relates to laser liquid level meter technical field, including range finder and laser liquid level meter, the laser liquid level meter is located at range finder one side position, the laser liquid level meter and range finder between fixed connection has connecting line, the lower end outer surface of range finder is fixedly installed with mounting plate, the mounting plate upper end middle position both sides are provided with mounting groove, the laser liquid level meter annular is fixedly installed with fixed plate near upper end position, the laser liquid level meter annular outer surface is movably installed with movable ring near lower end position. The device can not only quickly fix the laser liquid level meter, but also can move the laser liquid level meter after fixing, measure the distance of multi-direction liquid, and adjust the laser light intensity to prevent explosion accidents during the liquid level test of flammable and explosive liquids such as oil, and enhance the safety of the device body. The above-mentioned device has high overall use cost, and needs to be placed in the kiln during use. The temperature in the kiln is high, and the continuous high temperature in the long-term use process is easy to damage the device. SUMMARY

[0005] The purpose of the present application is to provide a glass liquid level measuring device and method based on visual measurement technology to solve the problem of measuring non-continuous, high cost and high temperature damage to the device in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a glass liquid level measuring device and method based on visual measurement technology, comprising a cooling protection device, a lens temperature protection control device, a data acquisition and analysis device, a liquid level measurement algorithm and an installation auxiliary device.

[0007] Preferably, the cooling protection device comprises: a protective sleeve, which is provided in a hollow cylindrical structure; a dustproof sleeve, which is installed on the outer front end of the protective sleeve, and a detachable installation structure is formed between the dustproof sleeve and the protective sleeve by using a thread structure that matches each other; an air inlet pipe, which is fixedly installed through the lower surface of the dustproof sleeve, compressed air adjusted in pressure is injected into the air inlet pipe, a pressurized nozzle is fixedly installed through the inside of the dustproof sleeve and communicates with the air inlet pipe, a water cooling pipe in a spiral structure is fixedly installed on the inside of the side wall of the protective sleeve, a circulating water pump is fixedly installed through the lower end of the water cooling pipe and located on the lower surface of the protective sleeve, and a refrigeration box is fixedly installed through the upper end of the water cooling pipe and located on the upper surface of the protective sleeve.

[0008] Preferably, the lens temperature protection device comprises: a support frame transversely mounted inside the protective sleeve, a temperature sensor fixedly installed on the upper surface of the middle position of the support frame, an electric sliding block fixedly installed on the lower surface of the middle position of the protective sleeve and connected with the mounting frame, and a sliding structure formed between the electric sliding block and the linear sliding rod inside the mounting frame.

[0009] Preferably, the data acquisition and analysis device comprises: a visual camera fixedly installed on the upper surface of the front end of the support frame, and an optical auxiliary lens installed at the front end of the visual camera; and an optical filter fixedly installed inside the front end of the protective sleeve, which is used to filter out the light that does not need to enter the visual camera.

[0010] Preferably, the calculation formula of the liquid level measurement algorithm is H=a-AK, K=b / B, specifically, the actual distance of the liquid level reaching the specified mark is calculated by automatically calibrating the measurement ratio of the fixed inner brick size in the kiln.

[0011] Preferably, the installation auxiliary device comprises: a kiln side wall made of bricks, a glass fiber liquid stored inside the kiln side wall, a receiving groove formed in the inside of the kiln side wall, and a mark point fixedly installed at a specified position of the kiln side wall for identification; a mounting frame fixedly installed at the rear end inside the receiving groove by bolts, which is used to install the protective sleeve; and a dismounting sheath fixedly installed inside the protective sleeve by a threaded structure, and the support frame is fixedly installed inside the dismounting sheath.

[0012] Preferably, a water storage tank is fixedly installed outside the kiln side wall, a water inlet pipe is fixedly installed inside the water storage tank, and a one-way valve is fixedly installed at the top end outside the water inlet pipe, which can ensure that the water in the water storage tank can only enter the relay tank inside through the water inlet pipe.

[0013] Preferably, the top end of the water inlet pipe penetrates and connects with the relay tank inside the kiln side wall, and the relay tank is fixedly installed with an extrusion air bag in communication with it, so that when the extrusion air bag is extruded, the internal air will extrude the water in the relay tank.

[0014] Preferably, a water outlet pipe is fixedly installed on the upper surface of the relay tank, and a communication structure is formed between the water outlet pipe and the cooling nozzle fixedly installed at the top end inside the receiving groove, so that the water in the relay tank is sprayed out from the cooling nozzle through the water outlet pipe to perform emergency cooling on the protective sleeve.

[0015] Preferably, the receiving groove is connected with the water storage tank through the reflux pipe fixedly installed therein to form a communication structure, and the lower surface of the receiving groove is provided in an inclined structure, so that the water falling after cooling can flow into the water storage tank again through the reflux pipe for recycling.

[0016] Compared with the prior art, the beneficial effects of the glass liquid level measuring device and method based on visual measurement technology are that: the device uses a novel structure design, so that the device uses a visual camera to shoot the glass liquid level inside the kiln during use, and then uses a proportional conversion method to calculate the actual height of the liquid level, so as to achieve the purpose of continuously measuring the liquid level height, and when in use, the internal camera and lens are cooled by air cooling and water cooling to avoid damage to the device caused by high temperature, and when the equipment temperature is abnormal, the electric sliding block is used to store the device in the storage groove and the emergency cooling nozzle is used for emergency cooling, further protecting the device from damage, and the specific contents are as follows:

[0017] 1. The cooperation between the visual camera, the auxiliary lens and the marker point, the height of the glass liquid level inside the kiln side wall is shot by the visual camera cooperating with the auxiliary lens, the actual height of the liquid level is calculated by the distance between the liquid level height and the marker point, and the specific formula is H=a-AK, K=b / B, wherein H is the actual liquid level, a is the distance from the actual marker point to the bottom of the kiln, A is the distance from the marker point to the liquid level in the shot picture, K is the shot picture proportion coefficient, b is the height of a brick on the kiln side wall, and B is the height of a brick on the kiln side wall in the shot picture.

[0018] 2. The cooperation between the pressurized nozzle, the air inlet pipe, the water cooling pipeline, the circulating pump and the cooling box, during the use of the device, air is introduced into the air inlet pipe and sprayed out through the pressurized nozzle, so that the filter is cooled and dusted, and under the action of the circulating water pump, the water cooled in the cooling box circulates in the water cooling pipeline, so that the visual camera and the auxiliary lens in the protective sleeve are cooled.

[0019] 3. The cooperation between the storage groove, the temperature sensor, the extrusion air bag and the water storage tank, when the temperature sensor detects abnormal temperature, the protective sleeve is stored in the storage groove by the electric sliding block, so as to be away from the high temperature area, and the extrusion air bag is extruded, so that the water from the water storage tank enters the relay tank and is sprayed out of the cooling nozzle, so as to cool the protective sleeve and avoid damage to the equipment in the protective sleeve. DETAILED DESCRIPTION

[0020] Figure 1 It is a schematic view of the partial front view structure of the kiln side wall of the present application;

[0021] Figure 2 It is a schematic view of the front view structure of the protective sleeve of the present application;

[0022] Figure 3 It is a schematic view of the front view structure of the protective sleeve of the present application; Figure 2 It is a schematic view of the front view structure of the protective sleeve of the present application;

[0023] Figure 4The schematic diagram of the top structure of the mounting frame of the present application is shown in the figure.

[0024] Figure 5 The schematic diagram of the enlarged structure at B in the present application is shown in the figure. Figure 1

[0025] Figure 6 The schematic diagram of the front structure of the protective sleeve of the present application in the storage state is shown in the figure.

[0026] Figure 7 The schematic diagram of the front cross-sectional structure of the water storage tank of the present application is shown in the figure.

[0027] Figure 8 The schematic diagram of the picture taken by the visual camera of the present application is shown in the figure.

[0028] In the figure: 1, kiln side wall; 2, storage groove; 3, mounting frame; 4, protective sleeve; 5, support frame; 6, visual camera; 7, auxiliary lens; 8, optical filter; 9, dustproof sheath; 10, dismounting sheath; 11, air inlet pipe; 12, water cooling pipeline; 13, circulating water pump; 14, refrigeration tank; 15, cooling spray head; 16, temperature sensor; 17, pressurized spray head; 18, electric sliding block; 19, straight line sliding rod; 20, water storage tank; 21, relay box; 22, extrusion air bag; 23, water inlet pipe; 24, one-way valve; 25, water outlet pipe; 26, return pipe; 27, mark point. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0030] Please refer to Figures 1-8 The present application provides a technical solution: a glass liquid level measuring device and method based on visual measurement technology, which comprises a cooling protection device, a lens temperature protection control device, a data acquisition and analysis device, a liquid level measurement algorithm and an installation auxiliary device.

[0031] ​The cooling protection device comprises: a protection sleeve 4 arranged as a hollow cylindrical structure; a dustproof sleeve 9 installed outside the front end of the protection sleeve 4, wherein a detachable installation structure is formed between the dustproof sleeve 9 and the protection sleeve 4 by using a thread structure matched with each other; an air inlet pipe 11 fixedly installed through the lower surface of the dustproof sleeve 9, wherein the air inlet pipe 11 is filled with compressed air after pressure regulation, the dustproof sleeve 9 is fixedly installed through the inside and is provided with a pressurized nozzle 17 in communication with the air inlet pipe 11, the side wall of the protection sleeve 4 is fixedly installed with a water cooling pipe 12 in a spiral structure, the lower end of the water cooling pipe 12 is fixedly installed through and is provided with a circulating water pump 13 located on the lower surface of the protection sleeve 4, and the upper end of the water cooling pipe 12 is fixedly installed through and is provided with a refrigeration box 14 located on the upper surface of the protection sleeve 4; the lens temperature protection device comprises: a support frame 5 installed horizontally inside the protection sleeve 4, wherein a temperature sensor 16 is fixedly installed on the upper surface of the middle position of the support frame 5, and an electric sliding block 18 connected with the mounting frame 3 is fixedly installed on the middle position of the lower surface of the protection sleeve 4, and a sliding structure is formed between the electric sliding block 18 and a linear sliding rod 19 inside the mounting frame 3; the data acquisition and analysis device comprises: a visual camera 6 fixedly installed on the upper surface of the front end of the support frame 5, and an optical auxiliary lens 7 is installed at the front end of the visual camera 6; an optical filter 8 fixedly installed inside the front end of the protection sleeve 4, wherein the optical filter 8 is used to filter out light that is not needed to enter the visual camera 6; the calculation formula of the liquid level measurement algorithm is H=a-AK, K=b / B, specifically, the size of the fixed inner brick in the kiln is measured and calibrated, then the actual distance of the liquid level reaching the specified mark is calculated, and the installation auxiliary device comprises: a kiln side wall 1 made of bricks, wherein the inside of the kiln side wall 1 stores glass fiber liquid, the inside of the kiln side wall 1 is provided with a receiving groove 2, and a mark point 27 for identification is fixedly installed at a specified position of the kiln side wall 1; a mounting frame 3 fixedly installed inside the receiving groove 2 at the rear end by using bolts, wherein the mounting frame 3 is used to install the protection sleeve 4; a dismounting sleeve 10 installed outside the rear side of the protection sleeve 4 by using a thread structure, and the inside of the dismounting sleeve 10 is fixedly installed with the support frame 5;

[0032] In use, the protective sleeve 4 is first installed inside the kiln side wall 1 using the mounting frame 3, and then the visual camera 6 and auxiliary lens 7 inside the protective sleeve 4 take pictures of the glass level inside the kiln side wall 1, at which time the filter 8 filters part of the light, and the images are transmitted to the computer through the optical fiber Ethernet, and then the computer calculates the real-time height of the liquid level (the specific formula is H = a - AK, K = b / B, where H is the actual liquid level, a is the distance from the actual marker point 27 to the bottom of the kiln, A is the distance from the marker point 27 to the liquid level in the photographed picture, K is the scale factor of the photographed picture, b is the height of a brick of the kiln side wall 1, and B is the height of a brick of the kiln side wall 1 in the photographed picture), and in the process of use, the air inlet pipe 11 is used to introduce pressure-adjusted air into the dustproof cover 9, and then the air is sprayed from the pressurized nozzle 17 to cool and cool the surface of the filter 8, while the circulating water pump 13 is turned on to circulate the water in the water cooling pipe 12 to achieve the purpose of cooling the protective sleeve 4. When the temperature sensor 16 inside the protective sleeve 4 detects an abnormal temperature, the electric sliding block 18 is turned on through the Bluetooth signal to make the electric sliding block 18 drive the protective sleeve 4 to slide above the straight sliding rod 19, and finally the protective sleeve 4 is stored in the storage groove 2 to be away from the high-temperature area.

[0033] The water storage tank 20 is fixedly installed outside the kiln side wall 1, the water inlet pipe 23 is installed through the inside of the water storage tank 20, the one-way valve 24 is fixedly installed outside the top end of the water inlet pipe 23, the relay box 21 located inside the kiln side wall 1 is connected through the top end of the water inlet pipe 23, the extrusion air bag 22 is fixedly installed on the side of the relay box 21 and communicates with the relay box 21, the water outlet pipe 25 is fixedly installed through the upper surface of the relay box 21, and the cooling nozzle 15 fixedly installed at the top end inside the storage groove 2 forms a communication structure with the water outlet pipe 25. The storage groove 2 forms a communication structure with the water storage tank 20 through the reflux pipe 26 installed therethrough, and the lower surface of the storage groove 2 is provided in an inclined structure.

[0034] When the protective sleeve 4 enters the storage groove 2, the extrusion air bag 22 is extruded to extrude the water in the relay box 21 through the gas in the extrusion air bag 22 (the relay box 21 generates negative pressure when the extrusion air bag 22 restores the deformation, so that the water in the water storage tank 20 is sucked into the inside through the water inlet pipe 23), and the water in the relay box 21 is sprayed from the cooling nozzle 15 through the water outlet pipe 25, so as to perform emergency cooling on the outer surface of the protective sleeve 4. After cooling, the water enters the reflux pipe 26 through the inclined structure below the storage groove 2, and finally enters the water storage tank 20 again through the reflux pipe 26 for recycling.

[0035] In the description of the application, unless otherwise specified and limited, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second", "third" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0036] In the description of the application, it should be noted that, unless otherwise specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0037] Although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the application shall be included in the protection scope of the application.

Claims

1. A glass liquid level measuring device based on vision measurement technology, characterized in that: The system includes a cooling protection device, a lens temperature protection control device, a data acquisition and analysis device, a liquid level measurement algorithm, and an installation auxiliary device. The cooling protection device includes: a protective sleeve (4), configured as a hollow cylindrical structure; a dustproof sleeve (9), installed on the outside of the front end of the protective sleeve (4), wherein the dustproof sleeve (9) and the protective sleeve (4) are connected by a mutually mating threaded structure to form a disassembly and installation structure; and an air inlet pipe (11), fixedly installed through the lower surface of the dustproof sleeve (9). 11) Pressurized compressed air is injected into the dustproof sleeve (9). A pressurized nozzle (17) connected to the air inlet pipe (11) is fixedly installed inside the dustproof sleeve (9). A water-cooled pipe (12) with a spiral structure is fixedly installed inside the side wall of the protective sleeve (4). A circulating water pump (13) located on the lower surface of the protective sleeve (4) is fixedly installed at the lower end of the water-cooled pipe (12). A refrigeration box (14) located on the upper surface of the protective sleeve (4) is fixedly installed at the upper end of the water-cooled pipe (12). The lens temperature protection device includes: a support frame (5), which is horizontally installed inside the protective sleeve (4). A temperature sensor (16) is fixedly installed on the upper surface of the middle position of the support frame (5). An electric slider (18) connected to the mounting frame (3) is fixedly installed on the middle position of the lower surface of the protective sleeve (4). The electric slider (18) and the linear slide rod (19) inside the mounting frame (3) form a sliding structure. The data acquisition and analysis device includes: a visual camera (6), which is fixedly installed on the upper surface of the front end of the support frame (5), and an optical auxiliary lens (7) is installed at the front end of the visual camera (6); a filter (8), which is fixedly installed inside the front end of the protective sleeve (4), and the filter (8) is used to filter out light that does not need to enter the visual camera (6); The calculation formula for the liquid level measurement algorithm is H = a - AK and K = b / B, where H is the actual liquid level, a is the distance from the actual marker point to the bottom of the kiln, A is the distance from the marker point to the liquid level in the captured image, K is the scale coefficient of the captured image, b is the actual height of a brick on the side wall of the kiln, and B is the height of a brick on the side wall of the kiln in the captured image. Specifically, the actual distance from the liquid level to the designated marker point is calculated by automatically calibrating and measuring the size of the fixed inner bricks in the kiln. The installation auxiliary device includes: a kiln sidewall (1) made of bricks, the inside of which stores glass fiber liquid, and a storage groove (2) is provided on the inside of which the kiln sidewall (1) is provided, and a marker point (27) for identification is fixedly installed at a designated position on the kiln sidewall (1); a mounting bracket (3) fixedly installed at the rear end inside the storage groove (2) by bolts, the mounting bracket (3) being used to install the protective sleeve (4); and a disassembly sleeve (10) installed on the outside of the rear side of the protective sleeve (4) by a threaded structure, and a support frame (5) fixedly installed inside the disassembly sleeve (10); A water storage tank (20) is fixedly installed on the outer side of the kiln sidewall (1), and an inlet pipe (23) is installed through the inside of the water storage tank (20), and a one-way valve (24) is fixedly installed on the outside of the top end of the inlet pipe (23). The top end of the water inlet pipe (23) is connected to a relay box (21) located inside the kiln side wall (1), and a compression airbag (22) connected to the relay box (21) is fixedly installed on the side of the relay box (21).

2. The glass liquid level measuring device based on vision measurement technology according to claim 1, characterized in that: A water outlet pipe (25) is fixedly installed through the upper surface of the relay box (21), and the water outlet pipe (25) and the cooling nozzle (15) fixedly installed at the top of the inside of the storage tank (2) form a communication structure.

3. The glass liquid level measuring device based on vision measurement technology according to claim 2, characterized in that: The storage trough (2) is connected to the water tank (20) through a return pipe (26) installed therethrough, and the lower surface of the storage trough (2) is set as an inclined structure.

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