Heating control method and system for substrate glass forming furnace

Abstract

The invention discloses a substrate glass forming furnace heating control method and system, and the method comprises the steps: obtaining a heating control signal of a substrate glass forming furnace, and determining a corresponding control mode and a control loop from a heating control database according to the type of the heating control signal; and acquiring a preset temperature demand value of the substrate glass forming furnace and a current temperature value of a temperature detection point of the substrate glass forming furnace, and starting a corresponding control mode and a control loop based on the preset temperature demand value, the current temperature value and the type of the heating control signal, so that the temperature of the substrate glass forming furnace tends to the preset temperature demand value. According to the heating control method and system for the substrate glass forming furnace, centralized and accurate operation and control of a plurality of control loops are realized, so that the heating control operation of the substrate glass forming furnace is simpler, and the control stability and safety are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of substrate glass forming furnaces, and in particular to a heating control method and system for a substrate glass forming furnace. Background Art

[0002] Due to the large number of heating control loops in the substrate glass forming furnace, a large number of parameter settings and adjustment operations in the temperature control process rely on manual input by personnel, but the corresponding process production control links are complex, requiring personnel to have a strong sense of responsibility and rich practical experience to control this temperature control. However, in actual process adjustments, the consistency of personnel operation adjustment time and adjustment value is poor, and there is a certain gap between the actual temperature curve and the ideal temperature curve. Summary of the invention

[0003] In order to solve the technical problems existing in the background technology, the present invention provides a heating control method and system for a substrate glass forming furnace.

[0004] A heating control method for a substrate glass forming furnace proposed by the present invention comprises the following steps:

[0005] S1, obtaining a heating control signal of a substrate glass forming furnace, and determining a corresponding control mode and control loop from a heating control database according to the type of the heating control signal;

[0006] S2, obtaining a preset temperature requirement value of the substrate glass forming furnace and a current temperature value of a temperature detection point of the substrate glass forming furnace, and starting a corresponding control mode and a control loop based on the preset temperature requirement value, the current temperature value and the type of the heating control signal, so that the temperature of the substrate glass forming furnace tends to the preset temperature requirement value;

[0007] S3, within a preset time period, calculating the temperature change difference of the substrate glass forming furnace, and comparing the temperature change difference with a preset difference range according to a control monitoring strategy corresponding to the control mode;

[0008] S4. When the temperature change difference does not meet the preset difference range, a control mode switching instruction is generated.

[0009] Preferably, the type of the heating control signal includes but is not limited to temperature control signal, power control signal, voltage control signal, current control signal; the control mode includes but is not limited to temperature mode, power mode, voltage mode, current mode; the control loop includes but is not limited to temperature loop, power loop, voltage loop, current loop; the heating control database is pre-configured with a one-to-one mapping relationship between the type of heating control signal and the control mode and the control loop.

[0010] Preferably, the temperature control signal, the temperature mode, and the temperature loop have a one-to-one mapping relationship between each other; the power control signal, the power mode, and the power loop have a one-to-one mapping relationship between each other; the voltage control signal, the voltage mode, and the voltage loop have a one-to-one mapping relationship between each other; the current control signal, the current mode, and the current loop have a one-to-one mapping relationship between each other; step S1 specifically includes:

[0011] Acquire a heating control signal of a substrate glass forming furnace, and perform type analysis on the heating control signal to determine the type of the heating control signal;

[0012] According to the type of the heating control signal, the corresponding control mode and control loop are queried from the heating control database.

[0013] Preferably, step S2 specifically includes:

[0014] Obtain the preset temperature requirement value of the substrate glass forming furnace and the current temperature value of the temperature detection point of the substrate glass forming furnace;

[0015] Calculate the required temperature difference and the temperature adjustment direction according to the preset temperature requirement value and the current temperature value. The temperature adjustment direction includes heating up and cooling down.

[0016] The corresponding control mode and control loop are started according to the required temperature difference, the temperature adjustment direction and the type of heating control signal, so that the temperature of the substrate glass forming furnace reaches the preset temperature requirement value.

[0017] Preferably, the preset difference range includes but is not limited to a first change threshold, a second change threshold, a third change threshold, and a fourth change threshold; the control monitoring strategy specifically includes:

[0018] When the control mode is specifically a temperature mode, within a preset time period, a temperature change difference is calculated, and it is determined whether the temperature change difference meets a preset first change threshold;

[0019] When the control mode is specifically the power mode, within a preset time period, the temperature change difference is calculated, and it is determined whether the temperature change difference meets a preset second change threshold;

[0020] When the control mode is specifically a voltage mode, within a preset time period, a temperature change difference is calculated, and it is determined whether the temperature change difference meets a preset third change threshold;

[0021] When the control mode is specifically the current mode, the temperature change difference is calculated within a preset time period, and it is determined whether the temperature change difference meets a preset fourth change threshold.

[0022] Preferably, step S4 specifically includes:

[0023] When the control mode is specifically a temperature mode, the temperature change difference is compared with a first change threshold, and when the temperature change difference does not meet the first change threshold, a control mode switching instruction is generated;

[0024] When the control mode is specifically a power mode, the temperature change difference is compared with a second change threshold, and when the temperature change difference does not meet the second change threshold, a control mode switching instruction is generated;

[0025] When the control mode is specifically a voltage mode, the temperature change difference is compared with a third change threshold, and when the temperature change difference does not meet the third change threshold, a control mode switching instruction is generated;

[0026] When the control mode is specifically the current mode, the temperature change difference is compared with the fourth change threshold, and when the temperature change difference does not meet the fourth change threshold, a control mode switching instruction is generated.

[0027] Preferably, it also includes:

[0028] According to the control mode switching instruction, the heating control signal of the substrate glass forming furnace is changed, and steps S1 to S4 are repeated until the temperature of the substrate glass forming furnace reaches a preset temperature requirement value.

[0029] The present invention provides a heating control system for a substrate glass forming furnace, comprising:

[0030] A data distribution module, used for obtaining a heating control signal of the substrate glass forming furnace, and determining a corresponding control mode and control loop from a heating control database according to the type of the heating control signal;

[0031] A data processing module is used to obtain a preset temperature requirement value of the substrate glass forming furnace and a current temperature value of a temperature detection point of the substrate glass forming furnace, and start a corresponding control mode and a control loop based on the preset temperature requirement value, the current temperature value and the type of the heating control signal, so that the temperature of the substrate glass forming furnace tends to the preset temperature requirement value;

[0032] The data monitoring module is used to calculate the temperature change difference of the substrate glass forming furnace within a preset time period, and compare the temperature change difference with a preset difference range according to the control monitoring strategy corresponding to the control mode;

[0033] The instruction switching generation module is used to generate a control mode switching instruction when the temperature change difference does not meet the preset difference range.

[0034] In the present invention, the proposed substrate glass forming furnace heating control method and system obtains the heating control signal of the substrate glass forming furnace, and determines the corresponding control mode and control loop from the heating control database according to the type of the heating control signal; obtains the preset temperature requirement value of the substrate glass forming furnace and the current temperature value of the temperature detection point of the substrate glass forming furnace, and starts the corresponding control mode and control loop based on the preset temperature requirement value, the current temperature value and the type of the heating control signal, so that the temperature of the substrate glass forming furnace tends to the preset temperature requirement value; within the preset time period, calculates the temperature change difference of the substrate glass forming furnace, and compares the temperature change difference with the preset difference range according to the control monitoring strategy corresponding to the control mode; when the temperature change difference does not meet the preset difference range, generates a control mode switching instruction. The centralized and precise operation and control of multiple control loops are realized, making the heating control operation of the substrate glass forming furnace simpler and improving the stability and safety of the control. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A structural schematic diagram of the working process of a heating control method for a substrate glass forming furnace proposed by the present invention;

[0036] Figure 2 A schematic structural diagram of a control loop implementation method of a substrate glass forming furnace heating control method proposed by the present invention;

[0037] Figure 3 A schematic diagram of the system architecture of a substrate glass forming furnace heating control system proposed by the present invention;

[0038] Figure 4 This is a structural schematic diagram of a control interface of a heating control system for a substrate glass forming furnace proposed by the present invention. DETAILED DESCRIPTION

[0039] Reference Figure 1-4 The present invention provides a method for controlling heating of a glass substrate forming furnace, comprising the following steps:

[0040] S1. Obtain a heating control signal of a substrate glass forming furnace, and determine a corresponding control mode and control loop from a heating control database according to the type of the heating control signal.

[0041] In this embodiment, the types of heating control signals include but are not limited to temperature control signals, power control signals, voltage control signals, and current control signals; control modes include but are not limited to temperature modes, power modes, voltage modes, and current modes; control loops include but are not limited to temperature loops, power loops, voltage loops, and current loops; the heating control database is pre-configured with a one-to-one mapping relationship between the types of heating control signals and control modes and control loops.

[0042] In this embodiment, there is a one-to-one mapping relationship between the temperature control signal, the temperature mode, and the temperature loop; there is a one-to-one mapping relationship between the power control signal, the power mode, and the power loop; there is a one-to-one mapping relationship between the voltage control signal, the voltage mode, and the voltage loop; there is a one-to-one mapping relationship between the current control signal, the current mode, and the current loop; step S1 specifically includes:

[0043] Acquire a heating control signal of a substrate glass forming furnace, and perform type analysis on the heating control signal to determine the type of the heating control signal;

[0044] According to the type of the heating control signal, the corresponding control mode and control loop are queried from the heating control database.

[0045] S2. Obtain a preset temperature requirement value of the substrate glass forming furnace and a current temperature value of a temperature detection point of the substrate glass forming furnace, and start a corresponding control mode and control loop based on the preset temperature requirement value, the current temperature value, and the type of heating control signal, so that the temperature of the substrate glass forming furnace tends to the preset temperature requirement value.

[0046] In this embodiment, step S2 specifically includes:

[0047] Obtain the preset temperature requirement value of the substrate glass forming furnace and the current temperature value of the temperature detection point of the substrate glass forming furnace;

[0048] Calculate the required temperature difference and the temperature adjustment direction according to the preset temperature requirement value and the current temperature value. The temperature adjustment direction includes heating up and cooling down.

[0049] The corresponding control mode and control loop are started according to the required temperature difference, the temperature adjustment direction and the type of heating control signal, so that the temperature of the substrate glass forming furnace reaches the preset temperature requirement value.

[0050] S3. Within a preset time period, the temperature change difference of the substrate glass forming furnace is calculated, and the temperature change difference is compared with a preset difference range according to a control monitoring strategy corresponding to the control mode.

[0051] In this embodiment, the preset difference range includes but is not limited to the first change threshold, the second change threshold, the third change threshold, and the fourth change threshold; the control monitoring strategy specifically includes:

[0052] When the control mode is specifically a temperature mode, within a preset time period, a temperature change difference is calculated, and it is determined whether the temperature change difference meets a preset first change threshold;

[0053] When the control mode is specifically the power mode, within a preset time period, the temperature change difference is calculated, and it is determined whether the temperature change difference meets a preset second change threshold;

[0054] When the control mode is specifically a voltage mode, within a preset time period, a temperature change difference is calculated, and it is determined whether the temperature change difference meets a preset third change threshold;

[0055] When the control mode is specifically the current mode, the temperature change difference is calculated within a preset time period, and it is determined whether the temperature change difference meets a preset fourth change threshold.

[0056] In this embodiment, the preset difference range is set according to different control loops corresponding to different control modes, so that the temperature change difference changes stably within the adjustment period, thereby facilitating timely processing of temperature changes in the substrate glass forming furnace and avoiding the impact of temperature differences on production work.

[0057] S4. When the temperature change difference does not meet the preset difference range, a control mode switching instruction is generated.

[0058] In this embodiment, step S4 specifically includes:

[0059] When the control mode is specifically a temperature mode, the temperature change difference is compared with a first change threshold, and when the temperature change difference does not meet the first change threshold, a control mode switching instruction is generated;

[0060] When the control mode is specifically a power mode, the temperature change difference is compared with a second change threshold, and when the temperature change difference does not meet the second change threshold, a control mode switching instruction is generated;

[0061] When the control mode is specifically a voltage mode, the temperature change difference is compared with a third change threshold, and when the temperature change difference does not meet the third change threshold, a control mode switching instruction is generated;

[0062] When the control mode is specifically the current mode, the temperature change difference is compared with the fourth change threshold, and when the temperature change difference does not meet the fourth change threshold, a control mode switching instruction is generated.

[0063] In this embodiment, it also includes:

[0064] According to the control mode switching instruction, the heating control signal of the substrate glass forming furnace is changed, and steps S1 to S4 are repeated until the temperature of the substrate glass forming furnace reaches a preset temperature requirement value.

[0065] In this embodiment, when the control mode switching instruction is issued, the heating control signal of the substrate glass forming furnace can also be manually changed, or the priority of the control mode can be set, and the control mode can be switched step by step according to the priority of the control mode during the control mode switching.

[0066] In this embodiment, if Figure 2 As shown, the control loop is specifically a temperature loop and a power loop, and the control loop specifically includes a DCS system, a temperature controller, a power controller, a selector, a power regulator, a heater, a temperature detection element, and a power detection element. The DCS system is connected to the temperature controller and the power controller respectively through the DP bus, and the output results of the temperature controller and the power controller act on the power regulator after passing through the selector, and the power regulator outputs electrical energy to the heater.

[0067] Temperature control includes temperature detection elements and temperature controllers. The temperature controller receives the temperature value of the temperature detection element and can realize the temperature automatic or means control function of the circuit. Power control includes power detection elements and power controllers. The power controller receives the power value of the power detection element and can realize the power automatic or means control function of the circuit.

[0068] In this embodiment, hardware and software are combined, and the DCS system controls the corresponding controller through a bus connection mode, the controller outputs to the power regulator, the power regulator output acts on the heater, and the temperature and power feedback values ​​are respectively given to the temperature controller and the power controller. The present invention configures the control program and control screen through the DCS control station, and acts on the corresponding control loop and heater through the bus control mode, thereby realizing a remote, automatic, and multi-mode controlled loop heating system.

[0069] In this embodiment, the DCS system performs software configuration to realize remote control of the heating circuit. The DCS system includes DCS program configuration software, flow chart configuration software and DCS operation station. The control program is compiled using the DCS program configuration software to realize the required control functions. The flow chart configuration software is used to complete the design of the operation screen in the operation station, and the operation screen is connected to the corresponding control program to realize remote control from the upper computer to the lower computer. The configured control screen is presented on the DCS operation station. The control screen content includes all the circuits that need to be controlled. The control screen realizes target value setting, circuit selection, control mode selection, control mode selection, parameter setting, inspection confirmation and heating circuit startup operations.

[0070] Reference Figure 1-4 The present invention provides a substrate glass forming furnace heating control system, comprising:

[0071] A data distribution module, used for obtaining a heating control signal of the substrate glass forming furnace, and determining a corresponding control mode and control loop from a heating control database according to the type of the heating control signal;

[0072] A data processing module is used to obtain a preset temperature requirement value of the substrate glass forming furnace and a current temperature value of a temperature detection point of the substrate glass forming furnace, and start a corresponding control mode and a control loop based on the preset temperature requirement value, the current temperature value and the type of the heating control signal, so that the temperature of the substrate glass forming furnace tends to the preset temperature requirement value;

[0073] The data monitoring module is used to calculate the temperature change difference of the substrate glass forming furnace within a preset time period, and compare the temperature change difference with a preset difference range according to the control monitoring strategy corresponding to the control mode;

[0074] The instruction switching generation module is used to generate a control mode switching instruction when the temperature change difference does not meet the preset difference range.

[0075] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A heating control method for a substrate glass forming furnace, characterized in that: The following steps are involved: S1, obtaining a heating control signal of a substrate glass forming furnace, and determining a corresponding control mode and control loop from a heating control database according to the type of the heating control signal; S2, obtaining a preset temperature requirement value of the substrate glass forming furnace and a current temperature value of a temperature detection point of the substrate glass forming furnace, and starting a corresponding control mode and a control loop based on the preset temperature requirement value, the current temperature value and the type of the heating control signal, so that the temperature of the substrate glass forming furnace tends to the preset temperature requirement value; S3, within a preset time period, calculating the temperature change difference of the substrate glass forming furnace, and comparing the temperature change difference with a preset difference range according to a control monitoring strategy corresponding to the control mode; S4. When the temperature change difference does not meet the preset difference range, a control mode switching instruction is generated.

2. The method for controlling heating of a substrate glass forming furnace according to claim 1, characterized in that: The types of the heating control signals include but are not limited to temperature control signals, power control signals, voltage control signals, and current control signals; the control modes include but are not limited to temperature modes, power modes, voltage modes, and current modes; the control loops include but are not limited to temperature loops, power loops, voltage loops, and current loops; the heating control database is pre-configured with a one-to-one mapping relationship between the types of heating control signals and control modes and control loops.

3. The substrate glass forming furnace heating control method according to claim 2, characterized in that: The temperature control signal, the temperature mode, and the temperature loop have a one-to-one mapping relationship between each other; the power control signal, the power mode, and the power loop have a one-to-one mapping relationship between each other; the voltage control signal, the voltage mode, and the voltage loop have a one-to-one mapping relationship between each other; the current control signal, the current mode, and the current loop have a one-to-one mapping relationship between each other; step S1 specifically includes: Acquire a heating control signal of a substrate glass forming furnace, and perform type analysis on the heating control signal to determine the type of the heating control signal; According to the type of the heating control signal, the corresponding control mode and control loop are queried from the heating control database.

4. The substrate glass forming furnace heating control method according to claim 2, characterized in that: Step S2 specifically includes: Obtain the preset temperature requirement value of the substrate glass forming furnace and the current temperature value of the temperature detection point of the substrate glass forming furnace; Calculate the required temperature difference and the temperature adjustment direction according to the preset temperature requirement value and the current temperature value. The temperature adjustment direction includes heating and cooling. The corresponding control mode and control loop are started according to the required temperature difference, the temperature adjustment direction and the type of heating control signal, so that the temperature of the substrate glass forming furnace reaches the preset temperature requirement value.

5. The substrate glass forming furnace heating control method according to claim 1, characterized in that: The preset difference range includes but is not limited to a first change threshold, a second change threshold, a third change threshold, and a fourth change threshold; the control monitoring strategy specifically includes: When the control mode is specifically a temperature mode, within a preset time period, a temperature change difference is calculated, and it is determined whether the temperature change difference meets a preset first change threshold; When the control mode is specifically the power mode, within a preset time period, the temperature change difference is calculated, and it is determined whether the temperature change difference meets a preset second change threshold; When the control mode is specifically a voltage mode, within a preset time period, a temperature change difference is calculated, and it is determined whether the temperature change difference meets a preset third change threshold; When the control mode is specifically the current mode, the temperature change difference is calculated within a preset time period, and it is determined whether the temperature change difference meets a preset fourth change threshold.

6. The method for controlling heating of a substrate glass forming furnace according to claim 5, characterized in that: Step S4 specifically includes: When the control mode is specifically a temperature mode, the temperature change difference is compared with a first change threshold, and when the temperature change difference does not meet the first change threshold, a control mode switching instruction is generated; When the control mode is specifically a power mode, the temperature change difference is compared with a second change threshold, and when the temperature change difference does not meet the second change threshold, a control mode switching instruction is generated; When the control mode is specifically a voltage mode, the temperature change difference is compared with a third change threshold, and when the temperature change difference does not meet the third change threshold, a control mode switching instruction is generated; When the control mode is specifically the current mode, the temperature change difference is compared with the fourth change threshold, and when the temperature change difference does not meet the fourth change threshold, a control mode switching instruction is generated.

7. The substrate glass forming furnace heating control method according to claim 1, characterized in that: Also includes: According to the control mode switching instruction, the heating control signal of the substrate glass forming furnace is changed, and steps S1 to S4 are repeated until the temperature of the substrate glass forming furnace reaches a preset temperature requirement value.

8. A heating control system for a substrate glass forming furnace, characterized in that: include: A data distribution module, used for obtaining a heating control signal of the substrate glass forming furnace, and determining a corresponding control mode and control loop from a heating control database according to the type of the heating control signal; A data processing module is used to obtain a preset temperature requirement value of the substrate glass forming furnace and a current temperature value of a temperature detection point of the substrate glass forming furnace, and start a corresponding control mode and a control loop based on the preset temperature requirement value, the current temperature value and the type of the heating control signal, so that the temperature of the substrate glass forming furnace tends to the preset temperature requirement value; The data monitoring module is used to calculate the temperature change difference of the substrate glass forming furnace within a preset time period, and compare the temperature change difference with a preset difference range according to the control monitoring strategy corresponding to the control mode; The instruction switching generation module is used to generate a control mode switching instruction when the temperature change difference does not meet the preset difference range.

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