Evaluation Method and Device for Heat Insulation Effect of Lightweight Heat-Insulating Refractory Bricks

Abstract

The present invention relates to a method and device for evaluating the thermal insulation effect of lightweight insulating refractory bricks. The method comprises: receiving a digital signal from a data acquisition card, the data acquisition card being used to obtain analog electrical signals from a plurality of different sensors, and performing analog-to-digital conversion on the analog electrical signals to convert the analog electrical signals into digital signals. The digital signal is converted into physical quantity data, and a PID algorithm is called to compare the physical quantity data with a set value to calculate the error between the physical quantity data and the set value. A control signal is obtained based on the error between the physical quantity data and the set value, and the control signal is sent to a temperature control system to control the temperature control system to adjust the heat output to the set value. Under set heating conditions, the temperature at the same depth of different test walls at two test locations is monitored respectively, and the thermal insulation effect of the different test walls is evaluated based on the temperature difference at the same depth, thereby realizing the evaluation of the thermal insulation effect of lightweight insulating refractory bricks under simulated working conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of refractory material testing, in particular to a method and device for evaluating the thermal insulation effect of lightweight heat-insulating refractory bricks. Background Art

[0002] Refractory materials are essential raw materials for numerous high-temperature process industries, including metallurgy, cement, glass, and chemicals. They play a vital role in ensuring the smooth and safe operation of these pillar industries of the national economy. Refractory materials are essential for the lining of high-temperature kilns. Due to various factors, including the kiln's structural type, fuel type, operating conditions, and process requirements, the refractory lining varies in material selection, structural design, and masonry implementation. The ultimate goal is to meet the production needs of high-temperature kilns as much as possible while saving time and costs. The refractory lining of a high-temperature kiln is generally a composite lining consisting of a working layer, a permanent layer, and an insulation layer. The outermost layer of the refractory lining is a steel structure that secures and restrains the refractory lining.

[0003] It's well known that steel softens and loses its rigidity and strength when exposed to excessive temperatures, posing a significant risk to the structural stability and safety of large, high-temperature kilns. Furthermore, if the steel structure outside the multi-layer refractory lining becomes overheated, it indicates excessive heat loss from the high-temperature zone, which in turn increases energy consumption during the production process. Therefore, real-time temperature monitoring of the outer steel structure of high-temperature kilns has become essential. While this method provides real-time insights into the kiln's operating conditions and can, to a certain extent, prevent safety incidents, it is ultimately a "post-event" measure taken after the refractory lining has been constructed. Even if problems and potential hazards can be identified promptly during operation, the cost of addressing them can be high.

[0004] Currently, before the construction of refractory furnace linings, different standard methods can be used to test the thermal conductivity of different refractory materials. For example, for dense refractory materials, they can be measured according to GB / T 5990-2021 "Test method for thermal conductivity of refractory materials (hot wire method)", GB / T 36133-2018 "Test method for thermal conductivity of refractory materials (platinum resistance thermometer method)", and GB / T 22588-2008 "Flash method for measurement of thermal conductivity or thermal diffusivity". For lightweight insulating refractory materials, they are often measured according to YB / T 4130-2005 "Test method for thermal conductivity of refractory materials (water flow plate method)", GB / T 5990-2021 "Test method for thermal conductivity of refractory materials (hot wire method)", or GB / T 37796-2019 "Test method for thermal conductivity of insulating refractory materials (calorimeter method)". Based on thermal conductivity test results, multi-layer structural models, and heat transfer principles, or by directly using thermal simulation software, the temperature field of a multi-layer refractory lining can be simulated to predict the temperature at the outer steel structure. However, these methods generally require sampling and / or sample preparation before testing the thermal conductivity of refractory materials. This raises questions about the representativeness of the samples, affecting the reference value of the test results. Furthermore, these methods only reflect the thermal conductivity of individual samples and struggle to capture the combined effects of the masonry structure and slurry in the actual multi-layer refractory lining.

[0005] In summary, the existing method for testing the thermal conductivity of refractory materials predicts the temperature of the steel structure in advance, which has a large deviation from the actual situation and has low accuracy. Summary of the Invention

[0006] Based on this, it is necessary to provide a method and device for evaluating the thermal insulation effect of lightweight insulating refractory bricks, which can reduce the deviation between the predicted temperature and the actual situation and thus improve the test accuracy, in order to address the above technical problems.

[0007] The present invention provides a method for evaluating the thermal insulation effect of lightweight insulating refractory bricks, the method comprising:

[0008] receiving a digital signal from a data acquisition card, wherein the data acquisition card is used to acquire analog electrical signals from a plurality of different sensors and perform analog-to-digital conversion on the analog electrical signals to convert the analog electrical signals into the digital signals;

[0009] Converting the digital signal into physical quantity data, and calling a PID algorithm to compare the physical quantity data with a set value to calculate an error between the physical quantity data and the set value;

[0010] obtaining a control signal according to an error between the physical quantity data and a set value, and sending the control signal to a temperature control system to control the temperature control system to adjust the heat output to reach the set value;

[0011] Under set heating conditions, the temperatures at the same depth of different test walls at the first test location and the second test location are monitored to evaluate the thermal insulation effects of the different test walls;

[0012] Among them, the multiple different sensors include thermocouples, voltage meters and current meters, and the multiple different sensors are electrically connected to the data acquisition card respectively. The thermocouple is used to measure the temperature in the heating furnace. The first test position and the second test position are symmetrically arranged on both sides of the heating rod and have the same heating conditions. The data acquisition card is electrically connected to the heating rod through a thyristor to control the heating temperature of the heating furnace to reach the set temperature based on the measured temperature of the thermocouple in response to the control signal.

[0013] In one embodiment, the step of receiving a digital signal from a data acquisition card includes:

[0014] Sending a first request to the data acquisition card, wherein the data acquisition card acquires real-time analog electrical signals from the multiple different sensors in real time in response to the first request and converts the real-time analog electrical signals into real-time digital signals;

[0015] A real-time digital signal is received from the data acquisition card in real time based on the first request, where the real-time digital signal is obtained by the data acquisition card performing analog-to-digital conversion on the real-time analog electrical signal.

[0016] In one embodiment, a signal amplifier is provided between the multiple different sensors and the data acquisition card, and the signal amplifier is used to amplify the analog electrical signals from the multiple different sensors and send the amplified analog electrical signals to the data acquisition card when the amplified signals reach a set threshold.

[0017] In one embodiment, the data acquisition card is specifically used to perform analog-to-digital conversion on the analog electrical signal amplified by the signal amplifier, so as to convert the amplified analog electrical signal into the digital signal.

[0018] In one embodiment, the physical quantity data includes temperature value data, voltage value data, and current value data;

[0019] The converting the digital signal into physical quantity data, and calling a PID algorithm to compare the physical quantity data with a set value to calculate an error between the physical quantity data and the set value, includes:

[0020] Based on the physical quantity data, obtain temperature value data corresponding to the thermocouple, and obtain an error between the temperature value data and a set temperature value according to the temperature value data, wherein the error includes a current error, an accumulated error value, and an error change rate;

[0021] The PID algorithm is called to perform comprehensive calculation on the current error, the accumulated error value and the error change rate to generate the control signal, which is an analog electrical signal generated by digital-to-analog conversion.

[0022] In one embodiment, obtaining a control signal based on an error between the physical quantity data and a set value, and sending the control signal to a temperature control system to control the temperature control system to adjust the heat output to reach the set value, includes:

[0023] The control signal is sent to the data acquisition card, and the data acquisition card sends the control signal to the thyristor after receiving the control signal;

[0024] The thyristor is used to adjust the voltage of the heating rod according to the control signal to change the heating power of the heating rod.

[0025] In one embodiment, the thyristor is a semiconductor device used to control the on / off of alternating current, and the voltage and current of the heating rod are adjusted by changing the conduction angle of the thyristor;

[0026] The method further comprises:

[0027] In each cycle of the alternating current between the heating rod and the thyristor, a trigger pulse is controlled to be applied at the first moment of each cycle to increase the conduction time of the thyristor and increase the voltage of the heating rod; and

[0028] Controlling the trigger pulse to be applied at the second moment of each cycle to shorten the conduction time of the thyristor and reduce the voltage of the heating rod;

[0029] The first moment is earlier than the second moment in each cycle.

[0030] The present invention also provides a device for evaluating the thermal insulation effect of lightweight insulating refractory bricks, the device comprising:

[0031] a signal receiving module, configured to receive digital signals from a data acquisition card, wherein the data acquisition card is configured to acquire analog electrical signals from a plurality of different sensors and perform analog-to-digital conversion on the analog electrical signals to convert the analog electrical signals into the digital signals;

[0032] an error calculation module, configured to convert the digital signal into physical quantity data, and call a PID algorithm to compare the physical quantity data with a set value to calculate an error between the physical quantity data and the set value;

[0033] a signal control module, configured to obtain a control signal based on an error between the physical quantity data and a set value, and send the control signal to a temperature control system to control the temperature control system to adjust the heat output to reach the set value;

[0034] a thermal insulation effect evaluation module, configured to monitor the temperature at the same depth of different test walls at the first test location and the second test location under set heating conditions, so as to evaluate the thermal insulation effects of the different test walls;

[0035] Among them, the multiple different sensors include thermocouples, voltage meters and current meters, and the multiple different sensors are electrically connected to the data acquisition card respectively. The thermocouple is used to measure the temperature in the heating furnace. The first test position and the second test position are symmetrically arranged on both sides of the heating rod and have the same heating conditions. The data acquisition card is electrically connected to the heating rod through a thyristor to control the heating temperature of the heating furnace to reach the set temperature based on the measured temperature of the thermocouple in response to the control signal.

[0036] The present invention also provides an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, it implements the method for evaluating the thermal insulation effect of lightweight insulating refractory bricks as described in any one of the above.

[0037] The present invention also provides a computer storage medium storing a computer program, which, when executed by a processor, implements the method for evaluating the thermal insulation effect of lightweight insulating refractory bricks as described in any one of the above.

[0038] The present invention also provides a computer program product, comprising a computer program, which, when executed by a processor, implements the method for evaluating the thermal insulation effect of lightweight insulating refractory bricks as described in any one of the above.

[0039] The above-mentioned method and device for evaluating the thermal insulation effect of lightweight insulating refractory bricks monitors the temperature at the same depth of different test walls by symmetrically setting two test positions with the same heating conditions on both sides of the heating furnace, and records the temperature in real time through a data acquisition card (DAQ board) during the monitoring process. By comparing the temperature difference at the same depth of the test wall at the two test positions, the thermal insulation effect of the lightweight insulating refractory bricks used for test wall masonry is evaluated, which reduces the deviation between the predicted temperature and the actual situation, thereby improving the test accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0041] Figure 1 This is a flow chart of a method for evaluating the thermal insulation effect of lightweight insulating refractory bricks provided by the present invention;

[0042] Figure 2 A schematic diagram of the temperature control system structure of a method for evaluating the thermal insulation effect of lightweight insulating refractory bricks in a specific embodiment of the present invention;

[0043] Figure 3 The second flow chart of the method for evaluating the thermal insulation effect of lightweight insulating refractory bricks provided by the present invention;

[0044] Figure 4 The third flow chart of the method for evaluating the thermal insulation effect of lightweight insulating refractory bricks provided by the present invention;

[0045] Figure 5 This is a fourth flow chart of the method for evaluating the thermal insulation effect of lightweight insulating refractory bricks provided by the present invention;

[0046] Figure 6 A schematic diagram of the structure of a device for evaluating the thermal insulation effect of lightweight insulating refractory bricks provided by the present invention;

[0047] Figure 7 This is a diagram of the internal structure of the computer device provided by the present invention. DETAILED DESCRIPTION

[0048] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying 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 making creative efforts shall fall within the scope of protection of the present invention.

[0049] The following combination Figure 1-Figure 7 The present invention describes a method and device for evaluating the thermal insulation effect of lightweight insulating refractory bricks.

[0050] like Figure 1 As shown, in one embodiment, a method for evaluating the thermal insulation effect of lightweight insulating refractory bricks includes the following steps:

[0051] Step S110 , receiving a digital signal from a data acquisition card, where the data acquisition card is used to acquire analog electrical signals from a plurality of different sensors and perform analog-to-digital conversion on the analog electrical signals to convert the analog electrical signals into digital signals.

[0052] Specifically, the computer receives digital signals from a data acquisition card, which is used to obtain analog electrical signals from multiple different sensors and perform analog-to-digital conversion on the analog electrical signals to convert the analog electrical signals into digital signals.

[0053] Among them, multiple different sensors include thermocouples, voltage meters and current meters, and multiple different sensors are electrically connected to the data acquisition card respectively. The thermocouples are used to measure the temperature inside the heating furnace. The first test position and the second test position are symmetrically arranged on both sides of the heating rod and have the same heating conditions. The data acquisition card is electrically connected to the heating rod through a thyristor to control the heating temperature of the heating furnace to reach the set temperature based on the measured temperature of the thermocouple in response to the control signal.

[0054] In some embodiments, a signal amplifier is provided between multiple different sensors and the data acquisition card. The signal amplifier is used to amplify the analog electrical signals from the multiple different sensors and send the amplified analog electrical signals to the data acquisition card when the amplified signals reach a set threshold.

[0055] In addition, the data acquisition card is specifically used to perform analog-to-digital conversion on the analog electrical signal amplified by the signal amplifier, so as to convert the amplified analog electrical signal into a digital signal.

[0056] Step S120 , converting the digital signal into physical quantity data, and calling a PID algorithm to compare the physical quantity data with a set value to calculate an error between the physical quantity data and the set value.

[0057] Specifically, the computer converts the received digital signal into physical quantity data, and calls the PID algorithm to compare the physical quantity data with the set value to calculate the error between the physical quantity data and the set value.

[0058] In step S130 , a control signal is obtained according to the error between the physical quantity data and the set value, and the control signal is sent to the temperature control system to control the temperature control system to adjust the heat output to reach the set value.

[0059] Specifically, the computer obtains a control signal based on the error between the physical quantity data and the set value, and sends the control signal to the temperature control system to control the temperature control system to adjust the heat output to reach the set value.

[0060] It should be noted that the computer sends the control signal to the data acquisition card, and the data acquisition card sends the control signal to the thyristor after receiving the control signal.

[0061] The thyristor is used to adjust the voltage of the heating rod according to the control signal to change the heating power of the heating rod.

[0062] Step S140 , monitoring the temperatures at the same depth of different test walls at the first test location and the second test location under set heating conditions, to evaluate the thermal insulation effects of the different test walls.

[0063] Specifically, the computer monitors the temperature at the same depth of different test walls at the first test position and the second test position respectively under the heating condition of the pre-controlled heating furnace reaching the set value, so as to evaluate the thermal insulation effect of different test walls.

[0064] It should be noted that the computer monitors the temperatures at the same depth of different test walls at the first test location and the second test location under the heating conditions of the set values, and the monitoring results obtained are used to characterize the difference in thermal insulation effects of different test walls at the first test location and the second test location.

[0065] The different test walls at the first test location and the second test location include but are not limited to test walls of the same material but different structures, test walls of different materials but different structures, and test walls of different materials but the same structure.

[0066] The above-mentioned method for evaluating the thermal insulation effect of lightweight insulating refractory bricks monitors the temperature at the same depth of different test walls by symmetrically setting two test positions with the same heating conditions on both sides of the heating furnace, and records the temperature in real time through a data acquisition card (DAQ board) during the monitoring process. By comparing the temperature difference at the same depth of the test wall at the two test positions, the thermal insulation effect of the lightweight insulating refractory bricks used for test wall masonry is evaluated, which reduces the deviation between the predicted temperature and the actual situation, thereby improving the test accuracy.

[0067] In a specific embodiment, the method for evaluating the thermal insulation effectiveness of lightweight insulating refractory bricks provided by the present invention is characterized by simultaneously considering the comprehensive thermal insulation effects of three factors: refractory bricks, refractory mortar, and masonry method. The two test walls can be made of the same material and structure, allowing for consistency in test results, or they can be made of different materials or masonry methods, allowing for simultaneous comparison and evaluation of differences between different materials.

[0068] In this embodiment, combined with Figure 2As shown, the temperature control system includes a thermocouple (a type of temperature sensor), a signal amplifier, a voltage meter, a current meter, a DAQ board (data acquisition card), a computer, a thyristor and a heating rod. In the process of evaluating the thermal insulation effect of different refractory materials, the thermocouple and the current / voltage meter will amplify the collected analog electrical signal by the amplifier to a certain range (set value) and then transmit it to the DAQ board. The DAQ board will perform analog-to-digital conversion on the received analog electrical signal and transmit the obtained digital signal to the computer. The computer will then convert the received digital signals corresponding to the temperature, current and voltage into corresponding measurement value data (physical quantity data), and compare the measurement value data with the set value to obtain the error between the measurement value and the set value. The PID algorithm will then generate a comprehensive temperature control signal based on the error and send the temperature control signal to the DAQ board. The temperature control signal will be adjusted to the control voltage of the heating rod through the thyristor, and finally the heating temperature will be stably controlled at the set value.

[0069] In this embodiment, a DAQ (data acquisition card) receives analog electrical signals from various sensors (thermocouples, voltage meters, and current meters). The DAQ performs analog-to-digital conversion (A / D) on these analog signals, converting them into digital signals representing the measured values of physical quantities such as temperature, voltage, and current. The DAQ then transmits the resulting digital signals to a computer, which receives these digital signals and converts them into corresponding physical quantity data, such as temperature, voltage, and current. The computer analyzes and processes the received data, typically including recording, displaying, and performing further calculations. Using a PID algorithm, the computer compares the measured temperature value with a set value and calculates a control signal to adjust the heating system's output to ensure the temperature reaches the preset value.

[0070] In this embodiment, the PID algorithm generates a control signal by calculating the error between the temperature measurement (obtained from the thermocouple) and the target set temperature.

[0071] The PID algorithm consists of the following three parts:

[0072] Proportional (P): Generates a control signal based on the magnitude of the current error.

[0073] Integration (I): Generates a control signal based on the accumulated value of the error to eliminate long-term steady-state errors.

[0074] Derivative (D): Generates a control signal based on the rate of change of the error to predict future error trends and make preemptive adjustments.

[0075] Through the combined calculations of these three components, the PID algorithm generates a comprehensive control signal to regulate the temperature, obtaining an appropriate temperature signal and transmitting it to the DAQ. The computer, based on the PID algorithm, generates an appropriate control signal, typically an analog signal generated through digital-to-analog conversion (D / A conversion). This control signal is then transmitted to the DAQ board. Upon receiving the control signal, the DAQ board transmits it to the thyristor (SCR). The SCR adjusts the voltage of the heater rod based on the control signal, thereby varying the heater's power and ultimately controlling the heating temperature.

[0076] In this embodiment, the thyristor voltage regulation principle is as follows:

[0077] A thyristor (SCR) is a semiconductor device that can be used to control the on / off flow of alternating current (AC). By varying the SCR's conduction angle (trigger angle), the voltage and current through the heater can be adjusted, thereby controlling the heating power. The SCR's conduction time is typically determined by controlling the timing of the trigger pulse during each AC cycle. When the trigger pulse is applied early in each cycle, the SCR conducts longer, resulting in a higher voltage on the heater. When the trigger pulse is applied later in each cycle, the SCR conducts shorter, resulting in a lower voltage on the heater. By adjusting the trigger pulse timing (i.e., the conduction angle), the voltage across the heater can be precisely controlled, thereby regulating the temperature.

[0078] In this embodiment, the temperature at the same depth of two test walls (symmetrically arranged) is monitored and recorded under identical heating conditions. The temperature at the same depth after reaching equilibrium reflects the thermal insulation effectiveness of the two masonry structures. It is generally believed that, at the same thickness (depth) and under the same heating conditions, the higher the measured temperature, the worse the thermal insulation effectiveness; conversely, the lower the measured temperature, the better the thermal insulation effectiveness. This embodiment is characterized by the ability to directly compare or evaluate the thermal insulation effectiveness of the refractory masonry structures being compared, both during the heating process and at equilibrium under identical conditions. This allows for simple operation, and the conditions more closely resemble actual operating conditions, resulting in more intuitive results.

[0079] like Figure 3 As shown, in one embodiment, the method for evaluating the thermal insulation effect of lightweight insulating refractory bricks provided by the present invention receives a digital signal from a data acquisition card, and includes the following steps:

[0080] Step S310: sending a first request to a data acquisition card. The data acquisition card acquires real-time analog electrical signals from a plurality of different sensors in real time in response to the first request, and converts the real-time analog electrical signals into real-time digital signals.

[0081] Step S320: receiving a real-time digital signal from the data acquisition card in real time based on the first request. The real-time digital signal is obtained by performing analog-to-digital conversion on the real-time analog electrical signal by the data acquisition card.

[0082] like Figure 4 As shown, in one embodiment, the method for evaluating the thermal insulation effect of lightweight insulating refractory bricks provided by the present invention converts a digital signal into physical quantity data, and calls a PID algorithm to compare the physical quantity data with a set value to calculate the error between the physical quantity data and the set value, specifically comprising the following steps:

[0083] Step S122: Based on the physical quantity data, obtain the temperature value data corresponding to the thermocouple, and obtain the error between the temperature value data and the set temperature value according to the temperature value data. The error includes the current error, the accumulated error value, and the error change rate.

[0084] Step S124 , calling the PID algorithm to perform comprehensive calculation on the current error, the accumulated error value, and the error change rate to generate a control signal, which is an analog electrical signal generated by digital-to-analog conversion.

[0085] like Figure 5 As shown, in one embodiment, the method for evaluating the thermal insulation effect of lightweight insulating refractory bricks provided by the present invention further includes the following steps:

[0086] Step S510 , in each cycle of the alternating current between the heating rod and the thyristor, controlling the trigger pulse to be applied at the first moment of each cycle to increase the conduction time of the thyristor and increase the voltage of the heating rod.

[0087] It should be noted that the thyristor is a semiconductor device used to control the on and off of alternating current. The voltage and current of the heating rod are adjusted by changing the conduction angle of the thyristor.

[0088] Step S520 , controlling the trigger pulse to be applied at the second moment of each cycle to shorten the conduction time of the thyristor and reduce the voltage of the heating rod.

[0089] The first moment is earlier than the second moment in each cycle.

[0090] The following describes the thermal insulation effect evaluation device of the lightweight thermal insulation refractory brick provided by the present invention. The thermal insulation effect evaluation device of the lightweight thermal insulation refractory brick described below and the thermal insulation effect evaluation method of the lightweight thermal insulation refractory brick described above can be referred to each other.

[0091] like Figure 6 As shown, in one embodiment, a device for evaluating the thermal insulation effect of lightweight insulating refractory bricks includes a signal receiving module 610 , an error calculation module 620 , a signal control module 630 and a thermal insulation effect evaluation module 640 .

[0092] The signal receiving module 610 is used to receive digital signals from a data acquisition card. The data acquisition card is used to obtain analog electrical signals from multiple different sensors and perform analog-to-digital conversion on the analog electrical signals to convert the analog electrical signals into digital signals.

[0093] The error calculation module 620 is used to convert the digital signal into physical quantity data, and call the PID algorithm to compare the physical quantity data with the set value to calculate the error between the physical quantity data and the set value.

[0094] The signal control module 630 is used to obtain a control signal according to the error between the physical quantity data and the set value, and send the control signal to the temperature control system to control the temperature control system to adjust the heat output to reach the set value.

[0095] The thermal insulation effect evaluation module 640 is used to monitor the temperature at the same depth of different test walls at the first test location and the second test location under set heating conditions to evaluate the thermal insulation effects of different test walls.

[0096] Among them, multiple different sensors include thermocouples, voltage meters and current meters, and multiple different sensors are electrically connected to the data acquisition card respectively. The thermocouples are used to measure the temperature inside the heating furnace. The first test position and the second test position are symmetrically arranged on both sides of the heating rod and have the same heating conditions. The data acquisition card is electrically connected to the heating rod through a thyristor to control the heating temperature of the heating furnace to reach the set temperature based on the measured temperature of the thermocouple in response to the control signal.

[0097] In this embodiment, the thermal insulation effect evaluation device of the lightweight insulating refractory brick provided by the present invention further includes a data request module for:

[0098] A first request is sent to the data acquisition card. The data acquisition card acquires real-time analog electrical signals from a plurality of different sensors in real time in response to the first request, and converts the real-time analog electrical signals into real-time digital signals.

[0099] A real-time digital signal is received from the data acquisition card in real time based on the first request. The real-time digital signal is obtained by performing analog-to-digital conversion on the real-time analog electrical signal by the data acquisition card.

[0100] In this embodiment, the lightweight insulating refractory brick thermal insulation effect evaluation device provided by the present invention has a signal amplifier provided between multiple different sensors and a data acquisition card. The signal amplifier is used to amplify the analog electrical signals from multiple different sensors and send the amplified analog electrical signals to the data acquisition card when the amplification reaches a set threshold.

[0101] In this embodiment, in the thermal insulation effect evaluation device of the lightweight thermal insulating refractory brick provided by the present invention, the data acquisition card is specifically used to perform analog-to-digital conversion on the analog electrical signal amplified by the signal amplifier to convert the amplified analog electrical signal into a digital signal.

[0102] In this embodiment, the device for evaluating the thermal insulation effect of lightweight thermal insulating refractory bricks provided by the present invention has physical quantity data including temperature value data, voltage value data, and current value data.

[0103] The error calculation module is specifically used for:

[0104] Based on the physical quantity data, obtain the temperature value data corresponding to the thermocouple, and obtain the error between the temperature value data and the set temperature value according to the temperature value data. The error includes the current error, the accumulated error value and the error change rate;

[0105] The PID algorithm is called to perform comprehensive calculations on the current error, the accumulated error value, and the error change rate to generate a control signal, which is an analog electrical signal generated by digital-to-analog conversion.

[0106] In this embodiment, the device for evaluating the thermal insulation effect of lightweight insulating refractory bricks provided by the present invention, the signal control module is specifically used to:

[0107] The control signal is sent to the data acquisition card, and after receiving the control signal, the data acquisition card sends the control signal to the thyristor.

[0108] The thyristor is used to adjust the voltage of the heating rod according to the control signal to change the heating power of the heating rod.

[0109] In this embodiment, the thermal insulation effect evaluation device of the lightweight insulating refractory brick provided by the present invention, the thyristor is a semiconductor device used to control the on and off of alternating current, and the voltage and current of the heating rod are adjusted by changing the conduction angle of the thyristor.

[0110] Also includes a heater rod control module for:

[0111] In each cycle of the alternating current between the heating rod and the thyristor, a trigger pulse is controlled to be applied at the first moment of each cycle to increase the conduction time of the thyristor and increase the voltage of the heating rod.

[0112] The trigger pulse is controlled to be applied at the second moment of each cycle to shorten the conduction time of the thyristor and reduce the voltage of the heating rod.

[0113] The first moment is earlier than the second moment in each cycle.

[0114] Figure 7The following is a schematic diagram of the physical structure of an electronic device. The electronic device may be a smart terminal, and its internal structure diagram may be as follows: Figure 7 As shown. The electronic device includes a processor, a memory, and a network interface connected via a system bus. The processor of the electronic device is used to provide computing and control capabilities. The memory of the electronic device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the electronic device is used to communicate with an external terminal via a network connection. When the computer program is executed by the processor, a method for evaluating the thermal insulation effect of lightweight insulating refractory bricks is implemented, which method includes:

[0115] receiving digital signals from a data acquisition card, the data acquisition card being used to acquire analog electrical signals from a plurality of different sensors and performing analog-to-digital conversion on the analog electrical signals to convert the analog electrical signals into digital signals;

[0116] Convert the digital signal into physical quantity data, and call the PID algorithm to compare the physical quantity data with the set value to calculate the error between the physical quantity data and the set value;

[0117] A control signal is obtained based on the error between the physical quantity data and the set value, and the control signal is sent to the temperature control system to control the temperature control system to adjust the heat output to the set value;

[0118] Under the set heating conditions, the temperature at the same depth of different test walls at the first test location and the second test location is monitored to evaluate the thermal insulation effect of different test walls;

[0119] Among them, multiple different sensors include thermocouples, voltage meters and current meters, and multiple different sensors are electrically connected to the data acquisition card respectively. The thermocouples are used to measure the temperature inside the heating furnace. The first test position and the second test position are symmetrically arranged on both sides of the heating rod and have the same heating conditions. The data acquisition card is electrically connected to the heating rod through a thyristor to control the heating temperature of the heating furnace to reach the set temperature based on the measured temperature of the thermocouple in response to the control signal.

[0120] Those skilled in the art will understand that Figure 7 The structure shown in the figure is merely a block diagram of a portion of the structure related to the solution of the present invention, and does not constitute a limitation on the electronic device to which the solution of the present invention is applied. The specific electronic device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0121] On the other hand, the present invention also provides a computer storage medium storing a computer program, which, when executed by a processor, implements a method for evaluating the thermal insulation effect of lightweight insulating refractory bricks, the method comprising:

[0122] receiving digital signals from a data acquisition card, the data acquisition card being used to acquire analog electrical signals from a plurality of different sensors and performing analog-to-digital conversion on the analog electrical signals to convert the analog electrical signals into digital signals;

[0123] Convert the digital signal into physical quantity data, and call the PID algorithm to compare the physical quantity data with the set value to calculate the error between the physical quantity data and the set value;

[0124] A control signal is obtained based on the error between the physical quantity data and the set value, and the control signal is sent to the temperature control system to control the temperature control system to adjust the heat output to the set value;

[0125] Under the set heating conditions, the temperature at the same depth of different test walls at the first test location and the second test location is monitored to evaluate the thermal insulation effect of different test walls;

[0126] Among them, multiple different sensors include thermocouples, voltage meters and current meters, and multiple different sensors are electrically connected to the data acquisition card respectively. The thermocouples are used to measure the temperature inside the heating furnace. The first test position and the second test position are symmetrically arranged on both sides of the heating rod and have the same heating conditions. The data acquisition card is electrically connected to the heating rod through a thyristor to control the heating temperature of the heating furnace to reach the set temperature based on the measured temperature of the thermocouple in response to the control signal.

[0127] In another aspect, a computer program product or computer program is provided, the computer program product or computer program including computer instructions stored in a computer-readable storage medium. A processor of an electronic device reads the computer instructions from the computer-readable storage medium, and when the processor executes the computer instructions, a method for evaluating the thermal insulation effect of lightweight insulating refractory bricks is implemented, the method comprising:

[0128] receiving digital signals from a data acquisition card, the data acquisition card being used to acquire analog electrical signals from a plurality of different sensors and performing analog-to-digital conversion on the analog electrical signals to convert the analog electrical signals into digital signals;

[0129] Convert the digital signal into physical quantity data, and call the PID algorithm to compare the physical quantity data with the set value to calculate the error between the physical quantity data and the set value;

[0130] A control signal is obtained based on the error between the physical quantity data and the set value, and the control signal is sent to the temperature control system to control the temperature control system to adjust the heat output to the set value;

[0131] Under the set heating conditions, the temperature at the same depth of different test walls at the first test location and the second test location is monitored to evaluate the thermal insulation effect of different test walls;

[0132] Among them, multiple different sensors include thermocouples, voltage meters and current meters, and multiple different sensors are electrically connected to the data acquisition card respectively. The thermocouples are used to measure the temperature inside the heating furnace. The first test position and the second test position are symmetrically arranged on both sides of the heating rod and have the same heating conditions. The data acquisition card is electrically connected to the heating rod through a thyristor to control the heating temperature of the heating furnace to reach the set temperature based on the measured temperature of the thermocouple in response to the control signal.

[0133] Those skilled in the art will understand that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided by the present invention may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory.

[0134] By way of illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0135] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0136] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A method for evaluating the thermal insulation effect of lightweight insulating refractory bricks, characterized in that: The method comprises: receiving a digital signal from a data acquisition card, wherein the data acquisition card is used to acquire analog electrical signals from a plurality of different sensors and perform analog-to-digital conversion on the analog electrical signals to convert the analog electrical signals into the digital signals; Converting the digital signal into physical quantity data, and calling a PID algorithm to compare the physical quantity data with a set value to calculate an error between the physical quantity data and the set value; obtaining a control signal according to an error between the physical quantity data and a set value, and sending the control signal to a temperature control system to control the temperature control system to adjust the heat output to reach the set value; Under set heating conditions, the temperatures at the same depth of different test walls at the first test location and the second test location are monitored to evaluate the thermal insulation effects of the different test walls; Among them, the multiple different sensors include thermocouples, voltage meters and current meters, and the multiple different sensors are electrically connected to the data acquisition card respectively. The thermocouple is used to measure the temperature in the heating furnace. The first test position and the second test position are symmetrically arranged on both sides of the heating rod and have the same heating conditions. The data acquisition card is electrically connected to the heating rod through a thyristor to control the heating temperature of the heating furnace to reach the set temperature based on the measured temperature of the thermocouple in response to the control signal.

2. The method for evaluating the thermal insulation effect of lightweight insulating refractory bricks according to claim 1, characterized in that: The receiving of the digital signal from the data acquisition card comprises: Sending a first request to the data acquisition card, wherein the data acquisition card acquires real-time analog electrical signals from the multiple different sensors in real time in response to the first request and converts the real-time analog electrical signals into real-time digital signals; A real-time digital signal is received from the data acquisition card in real time based on the first request, where the real-time digital signal is obtained by the data acquisition card performing analog-to-digital conversion on the real-time analog electrical signal.

3. The method for evaluating the thermal insulation effect of lightweight insulating refractory bricks according to claim 1, wherein: A signal amplifier is provided between the multiple different sensors and the data acquisition card. The signal amplifier is used to amplify the analog electrical signals from the multiple different sensors and send the amplified analog electrical signals to the data acquisition card when the amplified signals reach a set threshold.

4. The method for evaluating the thermal insulation effect of lightweight insulating refractory bricks according to claim 3, characterized in that: The data acquisition card is specifically used to perform analog-to-digital conversion on the analog electrical signal amplified by the signal amplifier, so as to convert the amplified analog electrical signal into the digital signal.

5. The method for evaluating the thermal insulation effect of lightweight insulating refractory bricks according to claim 1, characterized in that: The physical quantity data includes temperature value data, voltage value data and current value data; The converting the digital signal into physical quantity data, and calling a PID algorithm to compare the physical quantity data with a set value to calculate an error between the physical quantity data and the set value, includes: Based on the physical quantity data, obtain temperature value data corresponding to the thermocouple, and obtain an error between the temperature value data and a set temperature value according to the temperature value data, wherein the error includes a current error, an accumulated error value, and an error change rate; The PID algorithm is called to perform comprehensive calculation on the current error, the accumulated error value and the error change rate to generate the control signal, which is an analog electrical signal generated by digital-to-analog conversion.

6. The method for evaluating the thermal insulation effect of lightweight insulating refractory bricks according to claim 5, characterized in that: The step of obtaining a control signal based on an error between the physical quantity data and a set value, and sending the control signal to a temperature control system to control the temperature control system to adjust the heat output to reach the set value, includes: The control signal is sent to the data acquisition card, and the data acquisition card sends the control signal to the thyristor after receiving the control signal; The thyristor is used to adjust the voltage of the heating rod according to the control signal to change the heating power of the heating rod.

7. The method for evaluating the thermal insulation effect of lightweight insulating refractory bricks according to any one of claims 1 to 6, characterized in that: The thyristor is a semiconductor device used to control the on and off of alternating current. The voltage and current of the heating rod are adjusted by changing the conduction angle of the thyristor. The method further comprises: In each cycle of the alternating current between the heating rod and the thyristor, a trigger pulse is controlled to be applied at the first moment of each cycle to increase the conduction time of the thyristor and increase the voltage of the heating rod; and Controlling the trigger pulse to be applied at the second moment of each cycle to shorten the conduction time of the thyristor and reduce the voltage of the heating rod; The first moment is earlier than the second moment in each cycle.

8. A device for evaluating the thermal insulation effect of lightweight insulating refractory bricks, characterized in that: The device comprises: a signal receiving module, configured to receive digital signals from a data acquisition card, wherein the data acquisition card is configured to acquire analog electrical signals from a plurality of different sensors and perform analog-to-digital conversion on the analog electrical signals to convert the analog electrical signals into the digital signals; an error calculation module, configured to convert the digital signal into physical quantity data, and call a PID algorithm to compare the physical quantity data with a set value to calculate an error between the physical quantity data and the set value; a signal control module, configured to obtain a control signal based on an error between the physical quantity data and a set value, and send the control signal to a temperature control system to control the temperature control system to adjust the heat output to reach the set value; a thermal insulation effect evaluation module, configured to monitor the temperature at the same depth of different test walls at the first test location and the second test location under set heating conditions, so as to evaluate the thermal insulation effects of the different test walls; Among them, the multiple different sensors include thermocouples, voltage meters and current meters, and the multiple different sensors are electrically connected to the data acquisition card respectively. The thermocouple is used to measure the temperature in the heating furnace. The first test position and the second test position are symmetrically arranged on both sides of the heating rod and have the same heating conditions. The data acquisition card is electrically connected to the heating rod through a thyristor to control the heating temperature of the heating furnace to reach the set temperature based on the measured temperature of the thermocouple in response to the control signal.

9. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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