A continuous casting machine ladle weight measurement system and measurement method

Abstract

The present invention discloses a continuous casting machine ladle weight measurement system and measurement method. The continuous casting machine ladle weight measurement system includes a weighing box, a test light source, a bearing pressure head, an optical fiber sensor, a first photoelectric detection module, a measurement control module, a temperature detection component and a temperature adjustment component; the weighing box includes an installation cavity, and the optical fiber sensor is arranged in the installation cavity; the optical fiber sensor includes a sensor body and an optical fiber, and the optical fiber is arranged on the sensor body and the end thereof passes through the installation cavity; the input end of the first photoelectric detection module is connected to the end of the optical fiber passing through the installation cavity, and the measurement control module is electrically connected to the output end of the first photoelectric detection module; the bearing pressure head is used to bear the ladle, and the sensor body includes a pressure-bearing part for transmitting the pressure exerted on the bearing pressure head to the optical fiber. By adopting the above scheme, the problems that the existing measurement system cannot overcome the influence of high temperature and the conventional optical fiber sensor cannot be used for the continuous casting machine ladle weight measurement are solved.

Description

Technical Field

[0001] The invention relates to the technical field of ladle weight measurement, and in particular to a continuous casting machine ladle weight measurement system and a measurement method. Background Art

[0002] The existing continuous casting machine ladle weight measurement system (with a range of more than 200 tons) uses high-temperature resistant resistive strain sensors for measurement. However, the existing resistive strain sensors can only work in an environment below 250°C. Under normal circumstances, the temperature of the ladle transmitted to the resistive strain sensor is around 200°C. At around 1600°C, molten steel overflows during the pouring process, and the resistive strain sensor and signal wires are often burned. In addition, the temperature fluctuation range of the resistive strain sensor is large, and the measurement data needs to be temperature compensated. The existing measurement method cannot overcome the impact of high temperature on the measurement system.

[0003] In recent years, people have made some achievements in the application research of optical fiber weight sensors, such as using the optical power loss caused by optical fiber microbending to establish the relationship between optical loss and strain to measure the strain size to obtain weight data; when various fiber gratings are subjected to pressure, the optical path will change due to the change of refractive index and optical fiber length, resulting in a change in the reflected wavelength. △ λ, by measuring the reflected wavelength shift △ The size of λ can be used to obtain weight data. Optical fiber has the characteristics of high temperature resistance and strong anti-interference ability. The fiber grating sensor with the worst temperature conditions can also be used in an environment above 400℃.

[0004] The continuous casting machine ladle weight range is as high as 100 tons, the environmental conditions are poor, and the temperature fluctuation range is large. Conventional fiber optic sensors are difficult to apply to the continuous casting machine ladle weight measurement. There is a problem of strain and temperature cross-sensitivity in fiber grating measurement, and the continuous casting machine ladle weight measurement environment is difficult to overcome the impact of temperature changes.

[0005] In summary, for the application scenario of continuous casting machine ladle weight, there are problems that the existing measurement system cannot overcome the influence of high temperature, and conventional optical fiber sensors cannot be used to measure the weight of continuous casting machine ladle. Summary of the invention

[0006] The present invention provides a continuous casting machine ladle weight measurement system and a measurement method to solve the problems that the existing measurement system cannot overcome the influence of high temperature and the conventional optical fiber sensor cannot be used for continuous casting machine ladle weight measurement.

[0007] According to one aspect of the present invention, a continuous casting machine ladle weight measurement system is provided, the continuous casting machine ladle weight measurement system comprising a weighing box, a test light source, a bearing pressure head, an optical fiber sensor, a first photoelectric detection module, a measurement control module, a temperature detection member and a temperature adjustment component;

[0008] The weighing box comprises an installation cavity, and the optical fiber sensor is arranged in the installation cavity;

[0009] The test light source is used to output light source;

[0010] The optical fiber sensor comprises a sensor body and an optical fiber, wherein the optical fiber is arranged on the sensor body and an end of the optical fiber passes through the installation cavity;

[0011] The input end of the first photoelectric detection module is connected to the end of the optical fiber passing through the installation cavity, and the measurement control module is electrically connected to the output end of the first photoelectric detection module;

[0012] The bearing pressure head is arranged on the weighing box and is used to bear the ladle, and the sensor body comprises a pressure bearing part, and the pressure bearing part is used to transmit the pressure exerted on the bearing pressure head to the optical fiber;

[0013] The temperature detection element is arranged in the installation cavity, and is used to detect the temperature of the installation cavity to obtain a temperature signal;

[0014] The temperature regulating component is used to regulate the temperature in the installation cavity;

[0015] The measurement control module is electrically connected to the temperature detection component and the temperature adjustment component, and is used to drive the temperature adjustment component to operate based on the temperature signal so that the temperature in the installation cavity is within a preset temperature range.

[0016] In an optional embodiment of the present invention, the sensor body includes a first elastic body and a second elastic body, the upper surface of the first elastic body is etched with a plurality of first half tracks for accommodating the optical fiber, the lower surface of the second elastic body is etched with a plurality of second half tracks for accommodating the optical fiber, the first half track and the second half track are used to form a concave track when the upper surface of the first elastic body and the lower surface of the second elastic body are connected, and a high temperature resistant adhesive is applied in the concave track;

[0017] The optical fiber extends back and forth in a circuitous manner and passes through a plurality of the concave channels.

[0018] In an optional embodiment of the present invention, a guide groove is provided at the upper end of the second elastic body, and the optical fiber sensor further comprises a sensor pressure head, the lower end of the sensor pressure head is inserted into the guide groove, the upper end of the sensor pressure head forms the pressure-bearing portion, and the lower end of the bearing pressure head contacts the pressure-bearing portion;

[0019] And / or, the optical fiber sensor further comprises an optical fiber protective cover, wherein the optical fiber protective cover covers the optical fibers exposed from the recessed channels on both sides of the sensor body.

[0020] In an optional embodiment of the present invention, the weighing box is provided with an air inlet and an air outlet communicating with the installation cavity, and the air outlet is connected to an air outlet pipe;

[0021] The temperature adjustment component includes an air pump, and the air pump is connected to the air outlet pipe;

[0022] The continuous casting machine ladle weight measurement system also includes a protection tube, one end of which is connected to the sensor body, the end of the optical fiber passing through the sensor body is inserted into the protection tube, and the other end of the protection tube passes into the outlet pipe through the outlet hole.

[0023] In an optional embodiment of the present invention, the continuous casting machine ladle weight measurement system further includes a second photoelectric detection module and a light source control module;

[0024] The second photoelectric detection module is used to detect the light source output brightness of the test light source;

[0025] The light source control module is used to control the light source output of the test light source based on the light source output brightness, so that the light source output brightness is within a preset brightness range.

[0026] In an optional embodiment of the present invention, the continuous casting machine ladle weight measurement system further comprises an optical switch assembly;

[0027] There are multiple optical fiber sensors, which are divided into two groups. The two groups of optical fiber sensors are respectively used to detect the two arm ladles of the continuous casting machine. The optical switch component is used to control the first photoelectric detection module to detect one group of optical fiber sensors.

[0028] According to another aspect of the present invention, a method for measuring the weight of a continuous casting ladle is provided. The method for measuring the weight of a continuous casting ladle is applied to the continuous casting ladle weight measuring system according to any embodiment of the present invention. The method for measuring the weight of a continuous casting ladle comprises:

[0029] Establish the corresponding relationship between loss light intensity and ladle weight;

[0030] Obtain the output light intensity of the test light source;

[0031] Acquire the current light intensity detected by the first photoelectric detection module;

[0032] Determine a current loss light intensity based on the current light intensity and the output light intensity;

[0033] The current ladle weight is determined based on the current loss light intensity and the corresponding relationship.

[0034] In an optional embodiment of the present invention, before determining the current loss light intensity based on the current light intensity and the output light intensity, the method further includes:

[0035] Establish the temperature drift correction relationship of loss light intensity;

[0036] Correspondingly, after determining the current loss light intensity based on the current light intensity and the output light intensity, the method further includes:

[0037] Get the current temperature;

[0038] Correcting the current loss light intensity based on the current temperature and the temperature drift correction relationship;

[0039] Accordingly, determining the current ladle weight based on the current loss light intensity and the corresponding relationship includes:

[0040] The current ladle weight is determined based on the corrected current loss light intensity and the corresponding relationship.

[0041] In an optional embodiment of the present invention, the step of establishing a temperature drift correction relationship of the optical fiber sensor includes:

[0042] Place the optical fiber sensor in a constant temperature box;

[0043] Control the output light intensity of the test light source to output a preset intensity;

[0044] Acquire the current light intensity detected by the first photoelectric detection module;

[0045] Increase the test temperature according to the preset rule;

[0046] Select multiple different test temperatures as temperature test points;

[0047] Determine the optical loss drift at the current test temperature based on the deviation between the output light intensity at the temperature test point and the current light intensity;

[0048] The current test temperature and the optical loss drift at the current test temperature are associated to form a temperature drift correction relationship for the optical fiber sensor.

[0049] In an optional embodiment of the present invention, the establishing of the correspondence between the loss light intensity and the ladle weight includes:

[0050] Dividing a plurality of continuous weight test ranges based on a plurality of weight test points according to a preset rule, wherein the plurality of weight test points include a zero point;

[0051] Control the output light intensity of the test light source to output a preset intensity;

[0052] Acquire the current light intensity detected by the first photoelectric detection module when the load-bearing pressure head is idle;

[0053] The weight output value of the control measurement control module is controlled to be zero;

[0054] Determining the loss light intensity when the bearing pressure head is idle based on the difference between the current light intensity and the output light intensity;

[0055] Acquire the current light intensity detected by the first photoelectric detection module when the load-bearing pressure head is placed on the test object with a weight value corresponding to the weight test point adjacent to the zero point;

[0056] Determine the loss light intensity when the load-bearing pressure head carries the test object with a weight value corresponding to the current weight test point based on the difference between the zero point and the current light intensity at the current weight test point;

[0057] Determine the correspondence between the loss light intensity and the ladle weight within the weight test range from zero point to an adjacent weight test point based on the loss light intensity when the load-bearing pressure head is empty and when the load-bearing pressure head bears a test object of a weight value corresponding to the current weight test point;

[0058] When the load-bearing pressure head is placed on a test object having a weight value corresponding to the next weight test point adjacent to the current weight test point, the first photoelectric detection module detects and obtains the current light intensity of the next weight test point;

[0059] Determine the loss light intensity when the load-bearing pressure head carries the test object having a weight value corresponding to the next weight test point based on the difference between the current light intensity at the next weight test point and the current light intensity at the current weight test point;

[0060] Determine the correspondence between the loss light intensity and the ladle weight within the weight test range from the current weight test point to the next weight test point based on the loss light intensity when the load-bearing pressure head bears the test object with the corresponding weight value at the current weight test point and the next weight test point;

[0061] By analogy, starting from the zero point, the loss light intensity of all weight test points is determined in turn, and the corresponding relationship between the loss light intensity and the ladle weight within the weight test range formed by two adjacent weight test points is determined, until the corresponding relationship between the loss light intensity and the ladle weight within all weight test ranges is determined.

[0062] The technical solution of the embodiment of the present invention is to set up an optical fiber sensor and a load-bearing pressure head. When measuring the weight, it is only necessary to place the ladle on the load-bearing pressure head. The pressure-bearing part on the sensor body will transmit the pressure on the load-bearing pressure head to the optical fiber. When the optical fiber is subjected to pressure, it will cause a change in optical power loss. The magnitude of the optical loss will be different for different pressures. The light intensity output by the optical fiber after being subjected to pressure is detected by the first photoelectric detection module. The test control module can obtain the light loss situation and then obtain the weight of the ladle by comparing the light intensity output by the optical fiber after being subjected to pressure with the initial light intensity output by the test light source. By setting the optical fiber sensor inside the weighing box, it is possible to prevent molten steel from overflowing and burning the optical fiber sensor, and it is possible to better protect the optical fiber sensor and related circuits, and overcome the influence of high temperature environment, steel slag, etc. At the same time, the optical fiber has the characteristics of high temperature resistance and strong anti-interference ability, and can be used in high temperature environment. By setting the temperature detection part and the temperature adjustment component, the test control module can adjust the temperature in the installation cavity through the temperature adjustment component according to the temperature detected by the temperature detection part, so as to achieve constant control of the temperature of the weighing box, thereby preventing the large temperature fluctuation range on site, large deviation of the test data, and the inability of conventional optical fiber sensors to measure the weight of the continuous casting machine ladle. This solves the problem that the existing measurement system cannot overcome the influence of high temperature and the conventional optical fiber sensors cannot be used to measure the weight of the continuous casting machine ladle.

[0063] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0065] Figure 1 A structural schematic diagram of a ladle weight measurement system for a continuous casting machine provided in Embodiment 1 of the present invention;

[0066] Figure 2 A circuit block diagram of a continuous casting machine ladle weight measurement system provided in Embodiment 1 of the present invention;

[0067] Figure 3 is a front view of a first elastic body provided in Embodiment 1 of the present invention;

[0068] Figure 4 yes Figure 3 A top view of the first elastic body;

[0069] Figure 5 is a bottom view of a second elastic body provided in Embodiment 1 of the present invention;

[0070] Figure 6 yes Figure 5 A front view of the second elastic body;

[0071] Figure 7 is a schematic diagram of placing an optical fiber on a first elastic body provided by Embodiment 1 of the present invention;

[0072] Figure 8 is a schematic diagram of a connection structure between a first elastic body and a second elastic body provided in Embodiment 1 of the present invention;

[0073] Fig. 9 is a partial cross-sectional view of an optical fiber sensor provided in Embodiment 1 of the present invention;

[0074] Fig.10 This is a schematic diagram of a connection structure between a protection tube and an air outlet pipe provided in Embodiment 1 of the present invention;

[0075] Fig.11 A circuit block diagram of another continuous casting machine ladle weight measurement system provided in Embodiment 1 of the present invention;

[0076] Fig.12 A circuit block diagram of another continuous casting machine ladle weight measurement system provided in Embodiment 1 of the present invention;

[0077] Fig.13 A flow chart of a method for measuring the weight of a continuous casting machine ladle provided in the second embodiment of the present invention;

[0078] Fig.14 A flow chart of a method for measuring the weight of a continuous casting machine ladle provided in Embodiment 3 of the present invention;

[0079] Fig.15 for Fig.14 A flowchart of the steps in the process of establishing a temperature drift correction relationship of an optical fiber sensor;

[0080] Fig.16 for Fig.14 The flowchart of the steps in the figure is used to establish the corresponding relationship between the loss light intensity and the ladle weight.

[0081] Wherein: 1. weighing box; 101. installation cavity; 102. air inlet; 103. air outlet; 104. air outlet pipe; 1041. main road; 1042. first branch road; 1043. second branch road; 2. test light source; 3. bearing pressure head; 4. optical fiber sensor; 41. sensor body; 411. first elastic body; 412. second elastic body; 42. optical fiber; 43. first half road; 44. guide groove; 45. optical fiber protective cover; 46. sensor pressure head; 47. protective tube; 48. second half road; 5. first photoelectric detection module; 6. measurement control module; 7. temperature detection component; 8. temperature adjustment component; 81. vacuum pump; 9. second photoelectric detection module; 10. light source control module; 11. optical switch component; 111. first optical switch; 112. second optical switch. DETAILED DESCRIPTION

[0082] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0083] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0084] Embodiment 1

[0085] Figure 1 This is a schematic diagram of the structure of a continuous casting machine ladle weight measurement system provided in Embodiment 1 of the present invention. Figure 2 A circuit block diagram of a continuous casting machine ladle weight measurement system provided in Embodiment 1 of the present invention, such as Figure 1 and Figure 2 As shown, the continuous casting machine ladle weight measurement system includes a weighing box 1, a test light source 2, a bearing pressure head 3, an optical fiber sensor 4, a first photoelectric detection module 5, a measurement control module 6, a temperature detection component 7 and a temperature adjustment component 8.

[0086] The weighing box 1 includes an installation cavity 101 , and the optical fiber sensor 4 is disposed in the installation cavity 101 , wherein the installation cavity 101 is a closed cavity, and a sealed partition can be made inside the weighing box 1 and around the optical fiber sensor 4 to form the installation cavity 101 .

[0087] The test light source 2 is used to output a light source; wherein the test light source 2 refers to a light source capable of outputting brightness, and in a specific embodiment, may be an LED light source.

[0088] The optical fiber sensor 4 includes a sensor body 41 and an optical fiber 42. The optical fiber 42 is arranged on the sensor body 41 and the end thereof passes through the mounting cavity 101. The bearing pressure head 3 is arranged on the weighing box 1 and is used to bear the ladle. The sensor body 41 includes a pressure-bearing part, and the pressure-bearing part is used to transmit the pressure exerted on the bearing pressure head 3 to the optical fiber 42. Among them, the sensor body 41 refers to the main part of the optical fiber sensor 4, and the bearing pressure head 3 refers to the component used to bear the ladle. The ladle can be placed on the bearing pressure head 3 during weighing. The lower end of the bearing pressure head 3 can penetrate into the weighing box 1 and contact with the pressure-bearing part, so that the pressure exerted on the bearing pressure head 3 can be transmitted to the pressure-bearing part. Since the optical fiber 42 is arranged on the sensor body 41, the pressure exerted on the bearing pressure head 3 can be transmitted to the optical fiber 42 through the pressure-bearing part. When the optical fiber 42 is subjected to pressure, it will cause a change in optical power loss. The magnitude of the optical loss will be different depending on the pressure exerted.

[0089] The input end of the first photoelectric detection module 5 is connected to the end of the optical fiber 42 passing through the installation cavity 101, and the measurement control module 6 is electrically connected to the output end of the first photoelectric detection module 5. The first photoelectric detection module 5 refers to a module capable of detecting optical signals, which can detect the light intensity of the optical fiber 42, and the test control module refers to a functional module capable of performing logical control. The test control module compares the light intensity output by the optical fiber 42 after being subjected to pressure with the initial light intensity output by the test light source 2, so as to obtain the light loss situation and then obtain the weight of the ladle.

[0090] The temperature detection component 7 is arranged in the installation cavity 101, and is used to detect the temperature of the installation cavity 101 to obtain a temperature signal; the temperature adjustment component 8 is used to adjust the temperature in the installation cavity 101; the measurement control module 6 is electrically connected to the temperature detection component 7 and the temperature adjustment component 8, and is used to drive the temperature adjustment component 8 to operate based on the temperature signal so that the temperature in the installation cavity 101 is within a preset temperature range.

[0091] The temperature detection component 7 refers to a component capable of detecting temperature. In a specific embodiment, the temperature detection component 7 is at least one of a temperature sensor and a temperature measuring thermocouple. The temperature adjustment component 8 refers to a component capable of adjusting the temperature in the installation cavity 101. The preset temperature range refers to a preset constant temperature range that the installation cavity 101 should be in. The test control module adjusts the temperature in the installation cavity 101 through the temperature adjustment component 8 according to the temperature detected by the temperature detection component 7, so as to achieve constant control of the temperature of the weighing box 1.

[0092] The above scheme, by setting the optical fiber sensor 4 and the bearing pressure head 3, only needs to place the ladle on the bearing pressure head 3 when measuring the weight. The pressure-bearing part on the sensor body 41 will transmit the pressure on the bearing pressure head 3 to the optical fiber 42. When the optical fiber 42 is subjected to pressure, it will cause the optical power loss to change. The pressure is different, and the size of the optical loss is also different. The light intensity output by the optical fiber 42 after being subjected to pressure is detected by the first photoelectric detection module 5. The test control module can obtain the light loss situation by comparing the light intensity output by the optical fiber 42 after being subjected to pressure with the initial light intensity output by the test light source 2, and then obtain the weight of the ladle. By setting the optical fiber sensor 4 inside the weighing box 1, it can prevent the molten steel from overflowing and burning the optical fiber sensor 4, and can better protect the optical fiber sensor 4 and related circuits, overcome the influence of high temperature environment, steel slag, etc. At the same time, the optical fiber 42 has the characteristics of high temperature resistance and strong anti-interference ability, and can be used in a high temperature environment. By setting the temperature detection part 7 and the temperature adjustment component 8, the test control module can adjust the temperature in the installation cavity 101 through the temperature adjustment component 8 according to the temperature detected by the temperature detection part 7, so as to achieve constant control of the temperature of the weighing box 1, thereby preventing the occurrence of large fluctuations in the field temperature, large deviations in the test data, and the inability of the conventional optical fiber sensor 4 to be used for the continuous casting machine ladle weight measurement. The problem that the existing measurement system cannot overcome the influence of high temperature and the conventional optical fiber sensor 4 cannot be used for the continuous casting machine ladle weight measurement is solved.

[0093] In an optional embodiment of the present invention, Figure 1 As shown, the sensor body 41 includes a first elastic body 411 and a second elastic body 412. Figure 3 and Figure 4 As shown, the upper surface of the first elastic body 411 is etched with a plurality of first half tracks 43 for accommodating the optical fiber 42, as shown in FIG. Figure 5 and Figure 6 As shown, the lower surface of the second elastic body 412 is etched with a plurality of second half-tracks 48 for accommodating the optical fiber 42, and the first half-track 43 and the second half-track 48 are used to form a concave channel when the upper surface of the first elastic body 411 and the lower surface of the second elastic body 412 are connected, and a high temperature resistant adhesive is applied in the concave channel; Figure 7 and Figure 8As shown, the optical fiber 42 extends back and forth in a circuitous manner and passes through a plurality of concave channels.

[0094] Among them, the first elastic body 411 and the second elastic body 412 are connected to form the sensor body 41, and a small amount of high temperature resistant adhesive can be applied to the upper surface of the first elastic body 411, and then the lower surface of the second elastic body 412 is covered, so that the connection between the first elastic body 411 and the second elastic body 412 can be achieved. The optical fiber 42 extends back and forth in a circuitous manner and is inserted into multiple concave channels, which means that the optical fiber 42 is first inserted from one end of a concave channel to the other end, and then inserted from the other end of the next concave channel to one end, and the cycle repeats until all the concave channels are inserted. During the specific installation, when the first elastic body 411 and the second elastic body 412 are not connected, a small amount of high temperature resistant adhesive can be applied to the first half channel 43 and the second half channel 48, and then the optical fiber 42 is extended back and forth in a circuitous manner and inserted into multiple first half channels 43, and finally the upper surface of the first elastic body 411 and the lower surface of the second elastic body 412 are connected, at this time, the first half channel 43 and the second half channel 48 form a concave channel, and the optical fiber 42 will be in the concave channel. By making the sensor body 41 include the first elastomer 411 and the second elastomer 412, since both the first elastomer 411 and the second elastomer 412 are elastic, better elastic deflection can be achieved, and the first half track 43 and the second half track 48 make the sensor body 41 have a good overload limiting effect. At the same time, there are multiple recesses, and the optical fiber 42 is arranged in the recess, which can not only avoid the optical fiber 42 from being damaged by force, but also increase the deformation length and deformation amount of the optical fiber 42, thereby improving the measurement sensitivity.

[0095] Based on the above embodiments, Figure 1 and Figure 8 As shown, a guide groove 44 is provided at the upper end of the second elastic body 412, and the optical fiber sensor 4 further includes a sensor pressure head 46, the lower end of the sensor pressure head 46 is inserted into the guide groove 44, the upper end of the sensor pressure head 46 forms a pressure-bearing portion, and the lower end of the bearing pressure head 3 contacts the pressure-bearing portion. The shape of the sensor pressure head 46 matches the shape of the guide groove 44, and the guide groove 44 can guide the sensor pressure head 46, so that the pressure can be transmitted to the optical fiber 42 more accurately.

[0096] Based on the above embodiments, Fig. 9As shown, the optical fiber sensor 4 also includes an optical fiber 42 protective cover, which covers the optical fibers 42 exposed from the concave channels on both sides of the sensor body 41. Since the optical fiber 42 extends back and forth in a circuitous manner and passes through multiple concave channels, when passing from the end of one concave channel to another adjacent concave channel, the optical fiber 42 will be partially exposed from the concave channel. By setting the optical fiber 42 protective cover to cover the optical fibers 42 exposed from the concave channels on both sides of the sensor body 41, the optical fiber 42 can be protected. In a specific embodiment, the optical fiber 42 protective cover is filled with high temperature resistant asbestos and other protective materials, which can better protect the optical fiber 42.

[0097] In an optional embodiment of the present invention, Figure 1 and Fig.10 As shown, the weighing box 1 is provided with an air inlet 102 and an air outlet 103 communicating with the installation cavity 101, and the air outlet 103 is connected to an air outlet pipe 104; the temperature adjustment component 8 includes an air pump 81, and the air pump 81 is connected to the air outlet pipe 104. The air pump 81 can allow the external cold air to enter the installation cavity 101 from the air inlet 102, and then the hot air in the installation cavity 101 will be discharged from the air outlet pipe 104. The operation speed of the air pump 81 is different, and the air exchange efficiency inside and outside the installation cavity 101 will be different, so that the temperature inside the installation cavity 101 can be controlled.

[0098] On the basis of the above embodiment, the continuous casting machine ladle weight measurement system further includes a protection tube 47, one end of which is connected to the sensor body 41, the end of the optical fiber 42 passing through the sensor body 41 is passed through the protection tube 47, and the other end of the protection tube 47 passes through the outlet pipe 104 through the outlet hole 103. Among them, since the protection tube 47 is sleeved outside the end of the optical fiber 42 passing through the sensor body 41, it can protect the optical fiber 42.

[0099] In a specific embodiment, the air outlet pipe 104 includes a main path 1041, a first branch 1042, and a second branch 1043. One end of the main path 1041 is connected to both the first branch 1042 and the second branch 1043, and the other end of the main path 1041 is connected to the air outlet 103. The protection tube 47 passes through the main path 1041 and exits from the first branch 1042. The air pump 81 is disposed on the second branch 1043. Thus, the protection tube 47 and the air outlet pipe 104 can be separated.

[0100] In an optional embodiment of the present invention, Figure 2 As shown, the continuous casting machine ladle weight measurement system also includes a second photoelectric detection module 9 and a light source control module 10. The second photoelectric detection module 9 is used to detect the light source output brightness of the test light source 2. The light source control module 10 is used to control the light source output of the test light source 2 based on the light source output brightness, so that the light source output brightness is within a preset brightness range.

[0101] Among them, the second photoelectric detection module 9 refers to a module that can detect the light source output brightness of the test light source 2, and the light source control module 10 refers to a module that can control the brightness output of the test light source 2. Since the light source output brightness of the test light source 2 is unstable, it may affect the measurement result. The second photoelectric detection module 9 monitors the brightness output change of the test light source 2 in real time, and adjusts the light source control module 10 so that the light source output brightness remains constant to obtain a stable light source. This can improve the accuracy of weight measurement and obtain better measurement repeatability.

[0102] In an optional embodiment of the present invention, there are multiple optical fiber sensors 4, and the multiple optical fiber sensors 4 are connected in parallel or in series. The number of load-bearing pressure heads 3 is the same as the number of optical fiber sensors 4, and they are connected one-to-one with the optical fiber sensors 4. For example, in a specific embodiment, there are four optical fiber sensors 4, and the four load-bearing pressure heads 3 corresponding to the four optical fiber sensors 4 can be used to support the four corners of the ladle respectively. Since the volume of the ladle is usually large, by providing four optical fiber sensors 4 and four load-bearing pressure heads 3, the weight of the ladle can be better measured. Exemplarily, the four sensors are connected in series and electrically connected to the first photoelectric detection module 5. In another specific embodiment, as Fig.11 As shown, four optical fiber sensors 4 are connected in parallel, and the number of first photoelectric detection modules 5 is also four, and each optical fiber sensor 4 is connected to a first photoelectric detection module 5 in its parallel branch. In practical applications, the optical fiber sensors 4 can be connected in series or in parallel and the number of optical fiber sensors 4 can be selected according to the use requirements, and no specific limitation is made here.

[0103] In an optional embodiment of the present invention, Fig.12 As shown, the continuous casting machine ladle weight measurement system also includes an optical switch component 11; there are multiple optical fiber sensors 4, and the multiple optical fiber sensors 4 are divided into two groups. The two groups of optical fiber sensors 4 are respectively used to detect the two arm ladles of the continuous casting machine, and the optical switch component 11 is used to control the first photoelectric detection module 5 to detect one group of optical fiber sensors 4.

[0104] The number of optical fiber sensors 4 in each group is not limited. In a specific embodiment, the number of optical fiber sensors 4 in each group is four. The optical switch assembly 11 is a component that physically switches or logically operates the optical signal in the optical transmission line or the integrated optical circuit. By switching the two groups of optical fiber sensors 4 by the optical switch, the first photoelectric detection module 5 can detect any group of optical fiber sensors 4. In specific use, the two groups of optical fiber sensors 4 can be used to detect the ladles of the two arms of the continuous casting machine respectively. By setting the optical switch assembly 11, the conversion of the output signal of the weight detection of the ladles of the two rotating arms of the continuous casting machine can be realized. Therefore, there is no need to set up two sets of measurement systems, and the ladles of the two arms of the continuous casting machine can be measured uninterruptedly.

[0105] In a specific embodiment, when the continuous casting machine ladle weight measurement system also includes a test light source 2, a second photoelectric detection module 9 and a light source control module 10, the optical switch assembly 11 includes a first optical switch 111 and a second optical switch 112, two groups of optical fiber sensors 4 are connected in parallel, and the optical fiber sensors 4 of each group are connected in series. The input end of the first optical switch 111 is connected to the test light source 2, and the first output end and the second output end of the first optical switch 111 are electrically connected to the input ends of the two groups of optical fiber sensors 4, respectively. The output ends of the two groups of optical fiber sensors 4 are electrically connected to the first input end and the second input end of the second optical switch 112, respectively. The output end of the second optical switch 112 is electrically connected to the first photoelectric detection module 5, and the test control module is electrically connected to the control ends of the first optical switch 111 and the second optical switch 112. The two groups of optical fiber sensors 4 are divided into a first group and a second group. When the first group needs to be enabled, the test control module sends a control signal to the first optical switch 111 and the second optical switch 112. At this time, the first optical switch 111 enables the optical signal of the test light source 2 to be output to the first group of optical fiber sensors 4, and the second optical switch 112 enables the optical signal output by the first group of optical fiber sensors 4 to be transmitted to the first photoelectric detection module 5, so as to detect the ladle of one rotating arm of the continuous casting machine. When the second group needs to be enabled, the test control module sends a control signal to the first optical switch 111 and the second optical switch 112. At this time, the first optical switch 111 enables the optical signal of the test light source 2 to be output to the second group of optical fiber sensors 4, and the second optical switch 112 enables the optical signal output by the second group of optical fiber sensors 4 to be transmitted to the first photoelectric detection module 5, so as to detect the ladle of another rotating arm of the continuous casting machine. In addition, the signal switching through the optical switch assembly 11 has higher reliability than the existing collector ring transmission.

[0106] Embodiment 2

[0107] Fig.13 A flow chart of a method for measuring the weight of a continuous casting machine ladle provided in the second embodiment of the present invention. The method for measuring the weight of a continuous casting machine ladle is applied to the continuous casting machine ladle weight measuring system described in any embodiment of the present invention. Fig.13 As shown, the continuous casting machine ladle weight measurement method includes:

[0108] S110. Establish a corresponding relationship between the loss light intensity and the ladle weight.

[0109] Among them, the loss light intensity is the optical power loss of the optical fiber after it is subjected to the ladle pressure. When the optical fiber is subjected to pressure, it will cause the optical power loss to change. The magnitude of the optical loss will be different with different pressures. Therefore, there is a corresponding relationship between the loss light intensity and the ladle weight. The corresponding relationship between the loss light intensity and the ladle weight can be established in advance through testing.

[0110] S120: Obtain the output light intensity of the test light source.

[0111] The test light source is the light source that outputs light to the optical fiber when measuring the ladle weight, and the output light intensity is the brightness of the light output by the test light source.

[0112] S130: Acquire the current light intensity detected by the first photoelectric detection module.

[0113] Among them, the current light intensity is the light intensity output by the optical fiber after light loss occurs due to the ladle pressure.

[0114] S140. Determine a current loss light intensity based on the current light intensity and the output light intensity.

[0115] The current loss light intensity is the difference between the output light intensity and the current light intensity. The current loss light intensity can be obtained by subtracting the current light intensity from the output light intensity.

[0116] S150. Determine the current ladle weight based on the current loss light intensity and the corresponding relationship.

[0117] Among them, since the corresponding relationship is the corresponding relationship between the loss light intensity and the ladle weight, the current ladle weight corresponding to the current loss light intensity can be obtained according to the current loss light intensity and the corresponding relationship, thereby realizing the measurement of the ladle weight.

[0118] The above scheme establishes a corresponding relationship between the loss light intensity and the ladle weight, obtains the output light intensity of the test light source, then obtains the current light intensity detected by the first photoelectric detection module, and then determines the current loss light intensity based on the current light intensity and the output light intensity, and finally determines the current ladle weight based on the current loss light intensity and the corresponding relationship. This can conveniently realize the measurement of the ladle weight and solve the problem that the existing measurement system cannot overcome the influence of high temperature and that conventional optical fiber sensors cannot be used for continuous casting machine ladle weight measurement.

[0119] Embodiment 3

[0120] Fig.14 A flow chart of a method for measuring the weight of a continuous casting machine ladle provided in Example 3 of the present invention. This embodiment is an improvement on Example 2. Optionally, before determining the current loss light intensity based on the current light intensity and the output light intensity, it also includes: establishing a temperature drift correction relationship for the loss light intensity. Accordingly, after determining the current loss light intensity based on the current light intensity and the output light intensity, it includes: obtaining the current temperature; correcting the current loss light intensity based on the current temperature and the temperature drift correction relationship; accordingly, determining the current ladle weight based on the current loss light intensity and the corresponding relationship includes: determining the current ladle weight based on the corrected current loss light intensity and the corresponding relationship. Based on this, Fig.14 As shown, the method includes:

[0121] S210. Establish a corresponding relationship between the loss light intensity and the ladle weight.

[0122] S220, establishing a temperature drift correction relationship for loss light intensity.

[0123] Among them, the value of the loss light intensity may deviate at different temperatures. The temperature drift correction relationship refers to the corresponding relationship between temperature and the loss light intensity correction amount, that is, the corresponding loss light intensity correction amount at different temperatures is different.

[0124] S230: Obtain the output light intensity of the test light source.

[0125] S240: Acquire the current light intensity detected by the first photoelectric detection module.

[0126] S250. Determine a current loss light intensity based on the current light intensity and the output light intensity.

[0127] S260: Get the current temperature.

[0128] The current temperature refers to the temperature of the space where the optical fiber sensor is currently located, and the temperature can be detected by a temperature detection component.

[0129] S270. Correct the current loss light intensity based on the current temperature and the temperature drift correction relationship.

[0130] Among them, since the temperature drift correction relationship refers to the corresponding relationship between temperature and loss light intensity correction amount, the loss light intensity correction amount refers to the value used to correct the current loss light intensity. By knowing the current temperature, the loss light intensity correction amount corresponding to the current temperature can be known, and the current loss light intensity can be corrected.

[0131] S280. Determine the current ladle weight based on the corrected current loss light intensity and the corresponding relationship.

[0132] Among them, determining the current ladle weight by the corrected current loss light intensity can make the measured ladle weight more accurate, thereby improving the measurement accuracy.

[0133] In an optional embodiment of the present invention, Fig.15 As shown, the establishment of the temperature drift correction relationship of the optical fiber sensor includes:

[0134] S221. Place the optical fiber sensor in a constant temperature box.

[0135] The constant temperature box refers to a box in which the temperature at various locations is kept constant. When the optical fiber sensor is placed in the constant temperature box, the optical fiber sensor is connected to the first photoelectric detection module, and the first photoelectric detection module is also connected to the measurement control module.

[0136] S222, controlling the test light source to output a light intensity of a preset intensity.

[0137] The output light intensity is the light intensity output from the test light source to the optical fiber.

[0138] S223: Acquire the current light intensity detected by the first photoelectric detection module.

[0139] Among them, the current light intensity is the light intensity output by the optical fiber.

[0140] S224. Increase the test temperature according to a preset rule.

[0141] The test temperature is the current temperature in the thermostat.

[0142] S225. Select a plurality of different test temperatures as temperature test points.

[0143] The selection of the temperature test points may be selected according to user needs. For example, in this embodiment, 50° C., 100° C., 150° C., 200° C., and 250° C. may be selected as the temperature test points.

[0144] S226: Determine the optical loss drift at the current test temperature based on the deviation between the output light intensity at the temperature test point and the current light intensity.

[0145] Among them, the optical loss offset reflects the deviation between the output light intensity and the current light intensity, which can be obtained by subtracting the current light intensity from the output light intensity. Theoretically, when the optical fiber is not under pressure, there will be no optical loss on the optical fiber, but in practice, there will still be optical loss drift. The optical loss drift can be determined by the deviation between the output light intensity and the current light intensity. Since the optical loss drift will be different at different temperatures, the current test temperature is the test temperature corresponding to the temperature test point. By setting different temperature test points, measuring the output light intensity and the current light intensity at different temperature test points, and then according to the deviation between the two, the optical loss drift at the current test temperature can be obtained.

[0146] S227: Correlate the current test temperature with the optical loss drift at the current test temperature to form a temperature drift correction relationship for the optical fiber sensor.

[0147] By associating the current test temperature with the optical loss drift at the current test temperature, the optical loss drift at different test temperatures can be conveniently determined, that is, the temperature drift correction relationship of the optical fiber sensor is formed. Then, the current loss light intensity can be corrected by the optical loss offset at the current test temperature.

[0148] The following is a specific embodiment to illustrate the specific way to establish the temperature drift correction relationship of the optical fiber sensor. The optical fiber sensor is placed in a constant temperature box, and the first photoelectric detection module and the measurement control module are connected in series or parallel as described above. A test light source with an intensity of i is used for testing. Under room temperature, the first photoelectric detection module measures a light intensity of i0. The test temperature increases according to a certain rule. For example, 50°C, 100°C, 150°C, 200°C, and 250°C are selected as test points, and the measurement system measures light intensities of i1, i2, i3, i4, and i5. The light loss drift caused by temperature changes is γ1=i1-i0, γ2=i2-i0, γ3=i3-i0, γ4=i4-i0, and γ5=i5-i0. In the measurement calculation of the continuous casting machine ladle weight, the light intensity drift loss is subtracted for the corresponding temperature, so that the current loss light intensity can be corrected, so that the final ladle weight is more accurate.

[0149] In an optional embodiment of the present invention, Fig.16 As shown, the corresponding relationship between the loss light intensity and the ladle weight is established, including:

[0150] S210. Divide a plurality of continuous weight test ranges based on a plurality of weight test points according to a preset rule, wherein the plurality of weight test points include a zero point.

[0151] The weight test points correspond to different weight values ​​of the object being measured. The zero point refers to the point when the weight is zero, that is, the load-bearing pressure head is empty and no ladle is placed.

[0152] S211, controlling the test light source to output a light intensity of a preset intensity.

[0153] The output light intensity is the light intensity output from the test light source to the optical fiber.

[0154] S212, obtaining the current light intensity detected by the first photoelectric detection module when the bearing pressure head is idle.

[0155] The empty position of the bearing pressure head corresponds to the zero point of the weight test point. At this time, the current light intensity detected by the first photoelectric detection module is the light intensity output when the optical fiber is not under pressure.

[0156] S213. Control the weight output value of the measurement control module to be zero.

[0157] Among them, since the load-bearing pressure head is empty at this time, the weight output value of the measurement control module should be zero.

[0158] S214. Determine the loss light intensity when the bearing pressure head is idle based on the difference between the current light intensity and the output light intensity.

[0159] The loss light intensity when the bearing pressure head is idle is the output light intensity minus the current light intensity.

[0160] S215, obtaining the current light intensity detected by the first photoelectric detection module when the load-bearing pressure head places the test object at a weight value corresponding to the weight test point adjacent to the zero point.

[0161] Among them, the weight test points are sorted by size, different weight test points correspond to different weight values, and the test object can be a weight or a substitute.

[0162] S216. Determine the loss light intensity when the bearing pressure head bears the test object with a weight value corresponding to the current weight test point based on the difference between the zero point and the current light intensity at the current weight test point.

[0163] Among them, when the optical fiber is under pressure, strain will be generated, which will lead to light loss. Therefore, based on the difference between the zero point and the current light intensity of the current weight test point, the loss light intensity when the bearing pressure head bears the test object with the weight value corresponding to the current weight test point can be determined.

[0164] S217. Determine the correspondence between the loss light intensity and the ladle weight within the weight test range from the zero point to the adjacent weight test point based on the loss light intensity when the load-bearing pressure head is empty and when the load-bearing pressure head bears a test object with a weight value corresponding to the current weight test point.

[0165] Among them, at this time, the zero point and the adjacent weight test point are the two endpoints of the weight test range from the zero point to the adjacent weight test point. By knowing the loss light intensity at the two endpoints, the light loss corresponding to each kg of weight can be calculated, and the correspondence between the loss light intensity and the ladle weight in the weight test range from the zero point to the adjacent weight test point can be obtained.

[0166] S218. When the load-bearing pressure head is placed on a test object having a weight value corresponding to the next weight test point adjacent to the current weight test point, the first photoelectric detection module detects and obtains the current light intensity of the next weight test point.

[0167] S219. Based on the difference between the current light intensities at the next weight test point and the current weight test point, determine the loss light intensity when the bearing pressure head bears the test object having a weight value corresponding to the next weight test point.

[0168] S2110. Determine the correspondence between the loss light intensity and the ladle weight within the weight test range from the current weight test point to the next weight test point based on the loss light intensity when the load-bearing pressure head bears the test object with the corresponding weight values ​​at the current weight test point and the next weight test point.

[0169] Among them, at this time, the current weight test point and the next weight test point are the two endpoints of the weight test range from the current weight test point to the next weight test point. By knowing the loss light intensity at the two endpoints, the light loss corresponding to each kg of weight can be calculated, and the correspondence between the loss light intensity and the ladle weight in the weight test range from the current weight test point to the next weight test point can be obtained.

[0170] S2111. By analogy, starting from the zero point, determine the loss light intensity of all weight test points in turn, and determine the corresponding relationship between the loss light intensity and the ladle weight within the weight test range formed by two adjacent weight test points, until the corresponding relationship between the loss light intensity and the ladle weight within all weight test ranges is determined.

[0171] Among them, through the above method, the loss light intensity of each weight test point is determined in turn, and then the corresponding relationship between the loss light intensity and the ladle weight within the weight test range formed by the weight test point and the previous weight test point is determined, so that the corresponding relationship between the loss light intensity and the ladle weight in all weight test ranges can be determined, and then the weight value of the ladle can be obtained according to the different loss light intensities. Through segmented calibration, the corresponding relationship between the loss light intensity and the ladle weight can be obtained more accurately than the whole segment, thereby improving the accuracy of ladle weight measurement.

[0172] The following is a specific example to illustrate the specific method of calibrating the loss light intensity and the ladle weight. In this example, there are multiple optical fiber sensors connected in series. Assuming that the weight range of the continuous casting machine is 200t, it is segmented according to weight test points such as 0t, 50t, 100t, 150t, and 200t. That is, it will be divided into four weight test ranges of 0-50t, 50t-100t, 100t-150t, and 150t-200t.

[0173] The system first calibrates the first test point, i.e., the zero point: set the test light source output brightness i, read the current light intensity i01 detected by the first photoelectric detection module, and set the weight output value of the control measurement control module to 0t. Then the optical loss of the optical fiber measurement line of the weight measurement system γ01=i-i01.

[0174] The weight test point adjacent to the zero point, that is, the second test point 50t: place a 50t weight or substitute on the bearing pressure head, read the current light intensity i02 detected by the first photoelectric detection module, and set the weight output value of the measurement control module to 50t. Then the optical loss of the optical fiber measurement line of the weight measurement system γ02=i01-i02, then the corresponding optical loss k2=γ01÷50000 for each kg weight, and the first photoelectric detection module measured value i'02 corresponding to the weight output value of the measurement control module is output in proportion to k2, that is, the weight value is (i01-i'02)÷k2. That is, within the 0-50t weight test range, assuming that the weight of the ladle is X1, the light loss detected by the first photoelectric detection module when the bearing pressure head bears a ladle with a weight of X1 is i'02, and at this time X1=(i01-i'02)÷k2.

[0175] The third weight test point, i.e. 100t: weight weights or substitutes are evenly placed at the position of the bearing pressure head to increase to 100t, the current light intensity i03 detected by the first photoelectric detection module is read, and the weight output value of the control measurement control module is set to 100t. Then the optical loss γ03=i02-i03 is added to the optical fiber measurement line of the weight measurement system, and the optical loss k3=γ03÷50000 is corresponding to each kg of weight. The weight output value of the measurement control measurement control module corresponding to the value i'03 measured by the first photoelectric detection module in the 50-100t weight test range is output in proportion to k3, that is, the weight value is 50000+(i02-i'03)÷k3. That is, within the 50t-100t weight test range, assuming that the weight of the ladle is X2, when the bearing pressure head carries a ladle with a weight of X2, the optical loss detected by the first photoelectric detection module is i'03, and at this time X2=50000+(i02-i'03)÷k3.

[0176] The fourth weight test point, i.e. 150t: weight weights or substitutes are evenly placed at the position of the bearing pressure head to increase to 150t, the current light intensity i04 detected by the first photoelectric detection module is read, and the weight output value of the control measurement control module is set to 150t. Then the optical loss γ04=i03-i04 is added to the optical fiber measurement line of the weight measurement system, and the optical loss k4=γ04÷50000 is corresponding to each kg of weight. The value i'04 measured by the first photoelectric detection module in the 100-150t weight test range is set, and the weight output value of the measurement control measurement control module is output in proportion to k4, that is, the weight value is 100000+(i03-i'04)÷k4. That is, within the 100t-150t weight test range, assuming that the weight of the ladle is X3, the light loss detected by the first photoelectric detection module when the bearing pressure head bears a ladle with a weight of X3 is i'04, and at this time X3=100000+(i03-i'04)÷k4.

[0177] The fifth weight test point, i.e. 200t: weight weights or substitutes are evenly placed at the position of the bearing pressure head to increase to 200t, the current light intensity i05 detected by the first photoelectric detection module is read, and the weight output value of the control measurement control module is set to 150t. Then the optical loss γ05=i04-i05 is increased in the optical fiber measurement line of the weight measurement system, and the optical loss k5=γ05÷50000 is corresponding to each kg of weight. The value i'05 measured by the first photoelectric detection module in the 150-200t weight test range is set, and the weight output value of the corresponding measurement control measurement control module is output in proportion to k5, that is, the weight value is 150000+(i04-i'05)÷k5. That is, within the 150t-200t weight test range, assuming that the weight of the ladle is X4, when the bearing pressure head carries a ladle with a weight of X4, the optical loss detected by the first photoelectric detection module is i'05, and at this time X4=150000+(i04-i'05)÷k5.

[0178] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0179] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A continuous casting machine ladle weight measurement system, characterized in that: It includes a weighing box, a test light source, a load-bearing pressure head, an optical fiber sensor, a first photoelectric detection module, a measurement control module, a temperature detection component and a temperature adjustment component; The weighing box comprises an installation cavity, and the optical fiber sensor is arranged in the installation cavity; The test light source is used to output light source; The optical fiber sensor comprises a sensor body and an optical fiber, wherein the optical fiber is arranged on the sensor body and an end of the optical fiber passes through the installation cavity; The input end of the first photoelectric detection module is connected to the end of the optical fiber passing through the installation cavity, and the measurement control module is electrically connected to the output end of the first photoelectric detection module; The bearing pressure head is arranged on the weighing box and is used to bear the ladle, and the sensor body comprises a pressure bearing part, and the pressure bearing part is used to transmit the pressure exerted on the bearing pressure head to the optical fiber; The temperature detection element is arranged in the installation cavity, and is used to detect the temperature of the installation cavity to obtain a temperature signal; The temperature regulating component is used to regulate the temperature in the installation cavity; The measurement control module is electrically connected to the temperature detection element and the temperature adjustment component, and is used to drive the temperature adjustment component to operate based on the temperature signal so that the temperature in the installation cavity is within a preset temperature range; The sensor body comprises a first elastic body and a second elastic body, the upper surface of the first elastic body is etched with a plurality of first half tracks for accommodating the optical fiber, the lower surface of the second elastic body is etched with a plurality of second half tracks for accommodating the optical fiber, the first half track and the second half track are used to form a concave track when the upper surface of the first elastic body and the lower surface of the second elastic body are connected, and a high temperature resistant adhesive is applied in the concave track; The optical fiber extends back and forth in a circuitous manner and passes through a plurality of the concave channels.

2. The continuous casting machine ladle weight measurement system according to claim 1, characterized in that: The upper end of the second elastic body is provided with a guide groove, the optical fiber sensor further comprises a sensor pressure head, the lower end of the sensor pressure head is inserted into the guide groove, the upper end of the sensor pressure head forms the pressure-bearing part, and the lower end of the bearing pressure head contacts the pressure-bearing part; And / or, the optical fiber sensor further comprises an optical fiber protective cover, wherein the optical fiber protective cover covers the optical fibers exposed from the recessed channels on both sides of the sensor body.

3. The continuous casting machine ladle weight measurement system according to claim 1 or 2, characterized in that: The weighing box is provided with an air inlet and an air outlet communicating with the installation cavity, and the air outlet is connected with an air outlet pipe; The temperature adjustment component includes an air pump, and the air pump is connected to the air outlet pipe; The continuous casting machine ladle weight measurement system also includes a protection tube, one end of which is connected to the sensor body, the end of the optical fiber passing through the sensor body is inserted into the protection tube, and the other end of the protection tube passes into the outlet pipe through the outlet hole.

4. The continuous casting machine ladle weight measurement system according to claim 1 or 2, characterized in that: The continuous casting machine ladle weight measurement system also includes a second photoelectric detection module and a light source control module; The second photoelectric detection module is used to detect the light source output brightness of the test light source; The light source control module is used to control the light source output of the test light source based on the light source output brightness, so that the light source output brightness is within a preset brightness range.

5. The continuous casting machine ladle weight measurement system according to claim 1 or 2, characterized in that: The continuous casting machine ladle weight measurement system also includes an optical switch assembly; There are multiple optical fiber sensors, which are divided into two groups. The two groups of optical fiber sensors are respectively used to detect the two arm ladles of the continuous casting machine. The optical switch component is used to control the first photoelectric detection module to detect one group of optical fiber sensors.

6. A method for measuring the weight of a continuous casting machine ladle, characterized in that: The continuous casting machine ladle weight measurement system applied to any one of claims 1 to 5, wherein the continuous casting machine ladle weight measurement method comprises: Establish the corresponding relationship between loss light intensity and ladle weight; Obtain the output light intensity of the test light source; Acquire the current light intensity detected by the first photoelectric detection module; Determine a current loss light intensity based on the current light intensity and the output light intensity; The current ladle weight is determined based on the current loss light intensity and the corresponding relationship.

7. The method for measuring the weight of a continuous casting machine ladle according to claim 6, characterized in that: Before determining the current loss light intensity based on the current light intensity and the output light intensity, the method further includes: Establish the temperature drift correction relationship of loss light intensity; Correspondingly, after determining the current loss light intensity based on the current light intensity and the output light intensity, the method further includes: Get the current temperature; Correcting the current loss light intensity based on the current temperature and the temperature drift correction relationship; Accordingly, determining the current ladle weight based on the current loss light intensity and the corresponding relationship includes: The current ladle weight is determined based on the corrected current loss light intensity and the corresponding relationship.

8. The method for measuring the weight of a continuous casting machine ladle according to claim 7, characterized in that: Establish the temperature drift correction relationship of the optical fiber sensor, including: Place the optical fiber sensor in a constant temperature box; Control the output light intensity of the test light source to output a preset intensity; Acquire the current light intensity detected by the first photoelectric detection module; Increase the test temperature according to the preset rule; Select multiple different test temperatures as temperature test points; Determine the optical loss drift at the current test temperature based on the deviation between the output light intensity at the temperature test point and the current light intensity; The current test temperature and the optical loss drift at the current test temperature are associated to form a temperature drift correction relationship for the optical fiber sensor.

9. The method for measuring the weight of a continuous casting machine ladle according to claim 7 or 8, characterized in that: The establishing of the corresponding relationship between the loss light intensity and the ladle weight includes: Dividing a plurality of continuous weight test ranges based on a plurality of weight test points according to a preset rule, wherein the plurality of weight test points include a zero point; Control the output light intensity of the test light source to output a preset intensity; Acquire the current light intensity detected by the first photoelectric detection module when the load-bearing pressure head is idle; The weight output value of the control measurement control module is controlled to be zero; Determining the loss light intensity when the bearing pressure head is idle based on the difference between the current light intensity and the output light intensity; Acquire the current light intensity detected by the first photoelectric detection module when the load-bearing pressure head is placed on the test object with a weight value corresponding to the weight test point adjacent to the zero point; Determine the loss light intensity when the load-bearing pressure head carries the test object with a weight value corresponding to the current weight test point based on the difference between the current light intensity at the zero point and the current weight test point; Determine the corresponding relationship between the loss light intensity and the ladle weight within the weight test range from zero point to an adjacent weight test point based on the loss light intensity when the load-bearing pressure head is empty and when the load-bearing pressure head bears a test object of a weight value corresponding to the current weight test point; When the load-bearing pressure head is placed on a test object having a weight value corresponding to a next weight test point adjacent to the current weight test point, the first photoelectric detection module detects and obtains the current light intensity of the next weight test point; Determine the loss light intensity when the load-bearing pressure head carries the test object having a weight value corresponding to the next weight test point based on the difference between the current light intensity at the next weight test point and the current light intensity at the current weight test point; Determine the correspondence between the loss light intensity and the ladle weight within the weight test range from the current weight test point to the next weight test point based on the loss light intensity when the load-bearing pressure head bears the test object with the corresponding weight value at the current weight test point and the next weight test point; By analogy, starting from the zero point, the loss light intensity of all weight test points is determined in turn, and the corresponding relationship between the loss light intensity and the ladle weight within the weight test range formed by two adjacent weight test points is determined, until the corresponding relationship between the loss light intensity and the ladle weight within all weight test ranges is determined.

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