A temperature control system for a natural rubber curing room

Abstract

The present application relates to natural rubber processing temperature control technical field, especially to a kind of natural rubber rubber oven temperature control system, including temperature acquisition module, main control module and heating execution module, temperature acquisition module receives the analog electric signal output by multiple thermocouples and is converted into digital temperature signal transmission to main control module, main control module resolves and extracts local temperature value in different space positions and calculates temperature deviation, and then power regulation instruction is sent to heating execution module, heating execution module resolves power regulation instruction and extracts duty cycle data and adjusts the actual on-time ratio of electric heating element, adjusts the input electric power of electric heating element.The present application solves the technical problem that actual temperature control is not accurate due to single thermocouple cannot accurately reflect the actual temperature of each point through multi-point temperature sensing and weighted operation mechanism.

Description

Technical Field

[0001] This invention relates to the field of temperature control technology for natural rubber processing, and more particularly to a temperature control system for a natural rubber drying room. Background Technology

[0002] The processing of natural rubber requires heating the rubber blocks in a drying chamber. This chamber is equipped with a temperature control system, which includes a heating element, a temperature sensor, and a controller. The temperature sensor collects the ambient temperature signal inside the drying chamber and continuously sends it to the controller. The controller receives the ambient temperature signal and compares it with a preset temperature value. Based on the difference, it adjusts the input power of the heating element. Changes in the input power result in changes in the heat generated by the heating element; by adjusting the heat generated, the actual ambient temperature inside the drying chamber can be altered.

[0003] Current temperature control systems rely solely on a single thermocouple installed inside the drying chamber as a temperature sensor. However, the drying chamber is a large space with often uneven airflow. This uneven airflow leads to significant temperature differences in different areas, and a single thermocouple can only detect the localized temperature signal at its specific installation location. This localized temperature reading cannot accurately reflect the actual temperature at every point. The controller, relying solely on this single localized temperature signal to adjust the heating power, is prone to feedback errors, resulting in inaccurate temperature control within the drying chamber. For example, if the thermocouple is installed near a vent, the entry of cold air will cause a temperature drop around the vent. The thermocouple will detect this lower localized temperature signal and send it to the controller. Upon receiving this signal, the controller will directly increase the operating power of the heating device, causing the actual temperature in areas further away from the vent to rise. Excessively high ambient temperatures in areas away from the vent can damage the internal physical properties of the natural rubber blocks. Since a single thermocouple cannot accurately reflect the actual temperature at every point, the temperature regulation function will ultimately fail. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a temperature control system for a natural rubber drying room. This invention solves the technical problem that the actual temperature control of the drying room is inaccurate because a single thermocouple cannot accurately reflect the actual temperature of each spatial location.

[0005] To solve the above-mentioned technical problems, the specific contents of the present invention are as follows: The present invention provides a temperature control system for a natural rubber drying room, comprising physical equipment and a control device that establishes a communication connection with the physical equipment; The physical device includes multiple thermocouples and heating elements; the multiple thermocouples are distributed in multiple different spatial locations inside the drying chamber; the heating elements are arranged inside the drying chamber; the multiple thermocouples are electrically connected to the control device, and the heating elements are electrically connected to the control device. The control device includes a temperature acquisition module, a main control module, and a heating execution module; The temperature acquisition module establishes an electrical connection with multiple thermocouples, receives analog electrical signals output by multiple thermocouples, converts the analog electrical signals into digital temperature signals, and transmits the digital temperature signals unidirectionally to the main control module. The main control module is communicatively connected to the temperature acquisition module. The main control module receives the digital temperature signal, parses the digital temperature signal to extract the local temperature values ​​at different spatial locations, calculates the temperature deviation based on the local temperature values, generates a power adjustment command based on the temperature deviation, and sends the power adjustment command to the heating execution module. The heating execution module is communicatively connected to the main control module. The heating execution module receives the power adjustment command, parses the power adjustment command to extract the duty cycle data, adjusts the actual conduction time ratio of the heating element according to the duty cycle data, and adjusts the input power of the heating element.

[0006] Furthermore, in the temperature control system of the natural rubber drying room of the present invention, the temperature acquisition module includes a signal conditioning unit and an analog-to-digital conversion unit; the signal conditioning unit receives the analog electrical signal, performs hardware filtering and signal amplification on the analog electrical signal to generate a conditioning signal, and sends the conditioning signal to the analog-to-digital conversion unit; the analog-to-digital conversion unit receives the conditioning signal and converts the conditioning signal into the digital temperature signal.

[0007] Furthermore, in the temperature control system of the natural rubber drying room of the present invention, the main control module includes a data receiving port, a microprocessor chip, and an instruction output port; the data receiving port receives the digital temperature signal and transmits the digital temperature signal to the microprocessor chip; the microprocessor chip receives the digital temperature signal, extracts the corresponding local temperature value from the digital temperature signal, calculates the temperature deviation, and compares the temperature deviation with a preset fluctuation threshold; when the temperature deviation exceeds the preset fluctuation threshold, the microprocessor chip generates the power adjustment instruction and sends the power adjustment instruction to the instruction output port; the instruction output port receives the power adjustment instruction and sends the power adjustment instruction to the heating execution module.

[0008] Furthermore, in the temperature control system of the natural rubber drying room of the present invention, the microprocessor chip is provided with a first weight value and a second weight value; the microprocessor chip runs a multi-point temperature weighted calculation program, taking the local temperature value corresponding to one of the different spatial locations as the main feedback temperature variable, referring to the local temperature values ​​corresponding to the other different spatial locations as auxiliary feedback temperature variables, multiplying the first weight value with the main feedback temperature variable to obtain a first product, multiplying the second weight value with the auxiliary feedback temperature variable to obtain a second product, and adding the first product and the second product to obtain the temperature deviation.

[0009] Furthermore, the temperature control system of the natural rubber drying room of the present invention includes a first side wall, a second side wall and a central area; a plurality of thermocouples are respectively arranged on the first side wall, the second side wall and the central area; wherein, two thermocouples are arranged on the first side wall, two thermocouples are arranged on the second side wall and one thermocouple is arranged in the central area.

[0010] Furthermore, the temperature control system of the natural rubber drying room of the present invention includes a drying room having side walls and a ceiling; the thermocouples arranged on the first side wall and the second side wall are all on the same horizontal plane and are at a set distance from the side walls; the thermocouples arranged in the central area are located at a set installation height from the ceiling.

[0011] Furthermore, in the temperature control system for a natural rubber drying room described in this invention, the control device further includes an alarm module; the main control module compares the local temperature value with a preset safe temperature range, and when the local temperature value exceeds the preset safe temperature range, it generates an alarm trigger level and sends the alarm trigger level to the alarm module; the alarm module receives the alarm trigger level and generates a warning signal.

[0012] Furthermore, in the temperature control system for a natural rubber drying room of the present invention, the physical device further includes an audible and visual warning component; the alarm module includes a drive circuit; the drive circuit receives the alarm trigger level, amplifies the alarm trigger level to generate a power drive signal, and sends the power drive signal to the audible and visual warning component; the audible and visual warning component receives the power drive signal and converts the power drive signal into a visible light signal and a high-frequency sound wave signal.

[0013] Furthermore, in the temperature control system of the natural rubber drying room of the present invention, the heating execution module includes a power adjustment component; the power adjustment component receives the power adjustment command, parses the power adjustment command to extract the duty cycle data, generates a pulse power supply voltage with a corresponding pulse width according to the duty cycle data, outputs the pulse power supply voltage to the heating element, and adjusts the electrical energy input of the heating element according to the conduction time of the pulse power supply voltage.

[0014] Furthermore, in the temperature control system of the natural rubber drying room described in this invention, the heating element releases heat into the drying room, and the heat causes a change in the ambient temperature inside the drying room; multiple thermocouples sense the changed ambient temperature and generate the analog electrical signal, and transmit the analog electrical signal to the temperature acquisition module.

[0015] Beneficial effects of this invention: This invention provides a temperature control system for a natural rubber drying chamber, achieving technical effects through the coordinated operation of physical equipment and a control device. The physical equipment includes multiple thermocouples and heating elements distributed across various spatial locations within the drying chamber. The thermocouples sense the physical heat at different spatial locations and generate analog electrical signals. The control device includes a temperature acquisition module that receives the analog electrical signals and converts them into digital temperature signals. A main control module receives the digital temperature signals and analyzes and extracts local temperature values ​​from different spatial locations. The main control module calculates the temperature deviation based on the multiple local temperature values ​​and generates a power adjustment command. A heating execution module receives the power adjustment command and analyzes and extracts duty cycle data. The heating execution module adjusts the actual conduction time ratio of the heating elements based on the duty cycle data to adjust the input power of the heating elements. The multi-point data calculation mechanism of multiple thermocouples arranged in different spatial locations, combined with the main control module, overcomes the shortcomings of existing technologies. In existing technologies, a single thermocouple can only detect local temperature signals at a specific installation location and is prone to feedback deviations. The local temperature values ​​collected by multiple distributed thermocouples can accurately reflect the actual ambient temperature inside the drying chamber. The main control module regulates the heating element based on local temperature values ​​from multiple spatial locations. This avoids the inaccurate temperature control issues caused by relying on a single local temperature signal to adjust the heating element. The control device dynamically adjusts the input electrical power based on multi-point physical heat data, achieving precise control of the actual ambient temperature inside the drying chamber. Attached Figure Description

[0016] To more clearly illustrate the technical solution of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0017] Figure 1 The present invention provides a system architecture diagram of a temperature control system for a natural rubber drying room. Detailed Implementation

[0018] To make the technical solution of the present invention clearer, the present invention will be clearly and completely described below with reference to specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figure 1 The present invention provides a temperature control system for a natural rubber drying room, comprising physical equipment and a control device that establishes a communication connection with the physical equipment; The physical device includes multiple thermocouples and heating elements; the multiple thermocouples are distributed in multiple different spatial locations inside the drying chamber; the heating elements are arranged inside the drying chamber; the multiple thermocouples are electrically connected to the control device, and the heating elements are electrically connected to the control device. The control device includes a temperature acquisition module, a main control module, and a heating execution module; The temperature acquisition module establishes an electrical connection with multiple thermocouples, receives analog electrical signals output by multiple thermocouples, converts the analog electrical signals into digital temperature signals, and transmits the digital temperature signals unidirectionally to the main control module. The main control module is communicatively connected to the temperature acquisition module. The main control module receives the digital temperature signal, parses the digital temperature signal to extract the local temperature values ​​at different spatial locations, calculates the temperature deviation based on the local temperature values, generates a power adjustment command based on the temperature deviation, and sends the power adjustment command to the heating execution module. The heating execution module is communicatively connected to the main control module. The heating execution module receives the power adjustment command, parses the power adjustment command to extract the duty cycle data, adjusts the actual conduction time ratio of the heating element according to the duty cycle data, and adjusts the input power of the heating element.

[0020] Regarding the physical sensing and data conversion steps of the temperature control system for the natural rubber drying room, multiple thermocouples positioned at different locations within the drying room detect the physical heat at their respective locations and convert this physical heat into millivolt-level analog electrical signals using the Seebeck effect. The temperature acquisition module receives the continuous analog electrical signals output by multiple thermocouples, performs low-pass filtering to eliminate high-frequency electromagnetic interference, and simultaneously uses an operational amplifier circuit to amplify the millivolt-level analog electrical signals to the standard sampling voltage range of the analog-to-digital converter (ADC). Subsequently, the ADC discretizes and quantizes the amplified analog electrical signals according to a set sampling frequency, generating digital temperature signals with channel identifiers. Finally, the temperature acquisition module transmits the packaged digital temperature signal unidirectionally to the main control module via a serial communication bus.

[0021] In the process of executing the main control module's data parsing and power adjustment command generation, the specific calculation and threshold determination mechanism is as follows: The microprocessor inside the main control module receives the digital temperature signal from the serial communication bus, decomposes the digital temperature signal according to the communication protocol frame format, and extracts the local temperature value corresponding to the spatial position of each channel identifier. After extracting the local temperature value, the main control module executes the temperature deviation calculation and threshold determination program. Taking a preset target temperature of 60℃ and a preset fluctuation threshold of 2℃ as an example, if the parsed and extracted local temperature value of the first spatial position is 57℃, the microprocessor subtracts 57℃ from 60℃ to calculate the temperature deviation of the first spatial position as 3℃. The microprocessor compares the 3℃ temperature deviation with the preset fluctuation threshold of 2℃ and determines that the temperature deviation exceeds the preset fluctuation threshold, thereby triggering the power compensation calculation logic. The microprocessor substitutes the 3℃ temperature deviation into the proportional-integral-derivative control algorithm formula, and after proportional amplification, deviation integral accumulation, and differential lead calculation, calculates the duty cycle data required to compensate for the 3℃ temperature difference as 85%, writes the 85% duty cycle data into the control register, generates a power adjustment command, and sends it to the heating execution module.

[0022] Regarding the execution steps of adjusting the input power of the heating execution module, the specific hardware coordination instructions are as follows: The microcontroller inside the heating execution module receives the power adjustment instruction from the main control module, parses the power adjustment instruction, and extracts the 85% duty cycle data. Based on the 85% duty cycle data, the microcontroller configures the parameters of the overload register and compare register of the internal pulse width modulation generator, and outputs a control level with the corresponding pulse width to the external solid-state relay drive circuit. The solid-state relay performs alternating on / off actions according to the high and low states of the control level, controlling the AC mains power connected to the heating element to maintain an 85% actual conduction time ratio within one control cycle. The heating element performs resistive load heating at an 85% actual conduction time ratio, changing the effective input power consumed by the heating element per unit time, thereby regulating the Joule heat released by the heating element into the physical space inside the drying chamber.

[0023] Regarding the signal conditioning and analog-to-digital conversion steps of the temperature acquisition module, the underlying data processing path is as follows: The signal conditioning unit included in the temperature acquisition module receives the analog electrical signal output by the thermocouple; the signal conditioning unit internally incorporates a passive RC low-pass filter circuit and a high-precision instrumentation amplifier chip. The signal conditioning unit uses the passive RC low-pass filter circuit to truncate the analog electrical signal, filtering out high-frequency interference components mixed in by electromagnetic radiation in the industrial environment, thus completing the hardware filtering operation; the signal conditioning unit uses the instrumentation amplifier chip to perform linear voltage amplification on the hardware-filtered analog electrical signal, amplifying the tiny voltage amplitude at the millivolt level to a standard voltage range matching the subsequent sampling input range, generating a conditioning signal, and sending the conditioning signal to the analog-to-digital conversion unit; the analog-to-digital conversion unit internally integrates a high-resolution analog-to-digital conversion chip. The analog-to-digital conversion unit receives the conditioning signal and performs analog voltage holding and digital quantization encoding operations on the conditioning signal according to the set discrete sampling clock frequency, converting the continuously changing conditioning signal into a discrete digital temperature signal.

[0024] In the process of the main control module parsing data and generating power adjustment instructions, the specific physical conversion mechanism and data algorithm logic are as follows: The data receiving port of the main control module receives digital temperature signals via a serial communication bus and transmits the digital temperature signals to the cache register array inside the microprocessor chip without delay; the microprocessor chip receives the digital temperature signals, disassembles the digital temperature signals according to the communication protocol frame format, and extracts the local temperature values ​​carried in the digital temperature signals; the microprocessor chip calls the internal arithmetic logic unit to calculate the temperature deviation and reads the preset fluctuation threshold pre-written in the memory, comparing the magnitude of the temperature deviation with the preset fluctuation threshold; taking a preset fluctuation threshold of 2℃ and a temperature deviation of 4.4℃ calculated by the microprocessor chip as an example, the underlying numerical substitution is performed, the microprocessor chip executes the hardware comparison instruction, and finds that the temperature deviation of 4.4℃ exceeds the preset fluctuation threshold of 2℃, the closed-loop compensation algorithm module inside the microprocessor chip is then triggered, generating a power adjustment instruction containing specific duty cycle compensation parameters, and sending the power adjustment instruction to the instruction output port; the instruction output port receives the power adjustment instruction and sends the power adjustment instruction to the heating execution module through the underlying optocoupler isolation drive circuit.

[0025] Regarding the steps of the multi-point temperature weighted calculation program executed by the aforementioned microprocessor chip, the specific data dimension mapping and matrix concatenation logic is as follows: A first weight value and a second weight value are permanently burned into the non-volatile memory within the microprocessor chip; the microprocessor chip runs the multi-point temperature weighted calculation program, reading local temperature values ​​corresponding to different spatial locations during the addressing cycle, using one of the local temperature values ​​corresponding to a different spatial location as the main feedback temperature variable, and referring to the local temperature values ​​corresponding to the other different spatial locations as auxiliary feedback temperature variables; the first weight value is set to 0.7, and the second weight... Taking a value set to 0.3, a main feedback temperature variable mapped to 5℃, and an auxiliary feedback temperature variable mapped to 3℃ as an example, the microprocessor chip performs a low-level substitution calculation. The microprocessor chip calls the low-level hardware multiplier to multiply the first weight value of 0.7 with the main feedback temperature variable of 5℃, resulting in a first product of 3.5℃. The microprocessor chip then multiplies the second weight value of 0.3 with the auxiliary feedback temperature variable of 3℃, resulting in a second product of 0.9℃. Finally, the microprocessor chip calls the adder circuit to perform an accumulation operation on the first product of 3.5℃ and the second product of 0.9℃, outputting a numerical result of 4.4℃, thus obtaining the temperature deviation.

[0026] Regarding the spatial layout steps of the thermocouples inside the drying chamber, the specific physical topology configuration at the bottom layer is as follows: the internal space of the drying chamber is divided into three major monitoring domains: the first side wall, the second side wall, and the central area; five thermocouples form a multi-node spatial temperature sensing network; two thermocouples are fixedly arranged on the insulating mounting surface of the first side wall to capture the heat at the boundary of the alternating hot and cold zones near the entrance and exit areas of the drying chamber; two thermocouples are symmetrically arranged on the insulating mounting surface of the second side wall to capture the heat deposition state away from the entrance and exit areas; and one thermocouple is suspended in the central area to detect the core physical heat of the heat convection rising channel inside the drying chamber.

[0027] Regarding the specific three-dimensional spatial positioning of thermocouples in different spatial locations, the underlying size parameters and physical installation logic are as follows: The drying chamber has side walls and a ceiling. The system is preset to be 15cm away from the side walls, and the same horizontal plane is preset to be an elevation reference 1m off the ground. The thermocouples placed on the first and second side walls are offset from the side walls by a preset distance of 15cm to avoid temperature measurement errors caused by the cold bridge effect of heat conduction on the surface of the side walls, and are uniformly aligned to the same horizontal plane 1m off the ground. The thermocouples placed in the central area are vertically aligned with the ceiling structure and are suspended and fixed at a preset installation height of 1m from the ceiling to avoid laminar flow stagnation areas in the corners of the ceiling to obtain the true physical environment temperature of the dynamic airflow.

[0028] In the process of executing the above-mentioned main control module condition judgment and driving the alarm module, the specific numerical comparison logic and hardware conversion mechanism are as follows: The main control module calls the internal arithmetic logic unit to read and extract the local temperature value, and extracts the preset safe temperature range upper and lower limit parameters solidified in the memory; taking the preset safe temperature range set to 50℃ to 70℃ as an example, the underlying calculation is performed. If the local temperature value extracted by the main control module in the current clock cycle is 74℃, the main control module executes the numerical comparison instruction, determines that the local temperature value of 74℃ exceeds the upper limit boundary of the preset safe temperature range of 70℃, and triggers the state toggling operation of the general input and output pins inside the main control module; the main control module pulls the specified output pin from the 0V reference state to the 3.3V logic high state, generates a 3.3V alarm trigger level, and sends the alarm trigger level to the alarm module via the signal cable; the switching transistor circuit inside the alarm module receives the 3.3V alarm trigger level, and the switching transistor circuit is controlled to cross the turn-on threshold and enter the saturation conduction range, connecting the power supply link of the downstream load, and driving the alarm module to generate an audible and visual warning signal.

[0029] The main control module's internal memory stores preset fluctuation thresholds and preset safe temperature ranges. The main control module uses an arithmetic logic unit to extract the vulcanization critical temperature of the natural rubber block and the ambient heat dissipation rate of the drying chamber. These values ​​are then substituted into a tolerance evaluation algorithm to calculate the preset fluctuation threshold, set at 2 degrees Celsius. Simultaneously, the main control module extracts the physical deformation initiation temperature and scorch failure temperature of the natural rubber block. The physical deformation initiation temperature is used as the lower limit of the preset safe temperature range, and the scorch failure temperature is used as the upper limit, thus setting the preset safe temperature range to 50 to 70 degrees Celsius. Furthermore, the alarm module extracts the semiconductor conduction characteristic parameters of the internal switching transistor circuit and sets an activation threshold based on these parameters, ultimately setting the activation threshold to 1.5 volts. The main control module and the alarm module use these numerical benchmarks to compare and determine the physical state.

[0030] Regarding the physical execution steps of the alarm module driving the audible and visual warning component, the underlying circuit conversion and signal evolution mechanism is as follows: The driving circuit inside the alarm module receives the alarm trigger level sent by the main control module. The driving circuit integrates an optocoupler isolation chip and a high-power field-effect transistor. The driving circuit uses the optocoupler isolation chip to isolate the low-voltage control side from the high-voltage load side. The driving circuit uses the high-power field-effect transistor to receive the alarm trigger level and controls the conduction state of the source and drain. It performs power amplification processing on the low-voltage alarm trigger level to generate a power drive signal with the ability to drive the load. The power drive signal is sent to the audible and visual warning component configured at the physical device end via the power transmission cable. The audible and visual warning component has a light-emitting diode array and a piezoelectric buzzer connected in series inside. The audible and visual warning component receives the power drive signal. The power drive signal drives the light-emitting diode array to undergo electronic energy level transitions and emit high-brightness visible light signals. At the same time, the power drive signal drives the piezoelectric ceramic sheet inside the piezoelectric buzzer to undergo high-frequency mechanical vibration, converting electrical energy into high-frequency sound wave signals. The physical warning information is released to the outside through the visible light signal and the high-frequency sound wave signal.

[0031] Regarding the control steps for the output pulse power supply voltage of the aforementioned heating execution module, the underlying hardware coordination and energy regulation logic is as follows: The power regulation component configured inside the heating execution module receives the power regulation command issued by the main control module through the signal bus. The logic decoding circuit inside the power regulation component parses the power regulation command and extracts the duty cycle data carried in the power regulation command. Taking an 85% duty cycle calculated by the microprocessor chip and a fixed control period of 10 seconds as an example, the underlying numerical substitution is performed, and the power regulation component calls the internal pulse width modulation generator to read the 85% duty cycle. The pulse width modulation generator generates a trigger pulse sequence with a high-level duration of 8.5 seconds and a low-level duration of 1.5 seconds according to the duty cycle data of 85%. The trigger pulse sequence drives the internal solid-state relay to alternately cut off and close the power supply circuit, generating a pulse power supply voltage corresponding to the high-level pulse width. The power regulation component outputs the pulse power supply voltage to the heating element installed inside the drying chamber. According to the conduction time accumulated by the pulse power supply voltage in a single control cycle, the continuous state of the heating element obtaining effective working current is dynamically adjusted, thereby changing the amount of electrical energy input of the heating element per unit time.

[0032] In the aforementioned process of heating the electric heating element and implementing closed-loop feedback, the specific physical conversion mechanism and data flow network are as follows: The electric heating element receives the pulsed supply voltage and generates a Joule heating effect, converting the consumed electrical energy input into physical heat energy. The electric heating element continuously releases heat into the enclosed space inside the drying chamber. The released heat is physically diffused inside the drying chamber through air convection and thermal radiation, causing the ambient temperature at different locations within the drying chamber to dynamically rise or fall. Multiple thermocouples distributed at different locations within the drying chamber sense the changed ambient temperature. The bimetallic temperature sensing nodes inside the thermocouples experience temperature gradient changes, and the thermocouples use the Seebeck effect to convert the changed ambient temperature back into a millivolt-level analog electrical signal. Multiple thermocouples continuously transmit the analog electrical signal reflecting the actual physical state along signal wires to the temperature acquisition module, which then re-executes discretization sampling and analog-to-digital conversion operations to construct a seamless closed-loop feedback control loop from physical heating execution to spatial temperature sensing.

[0033] The microprocessor chip internally operates a multi-point temperature weighted calculation formula. The multi-point temperature weighted calculation formula is expressed as follows:

[0034] In the multi-point temperature weighted calculation formula, This represents the temperature deviation that the microprocessor chip accumulates by calling the adder circuit. This represents the first weight value burned into the non-volatile memory of the microprocessor chip. This represents the main feedback temperature variable extracted by the microprocessor chip. This represents the second weight value that is programmed into the non-volatile memory of the microprocessor chip. This represents the auxiliary feedback temperature variable extracted by the microprocessor chip. The proportional-integral-derivative (PID) control algorithm formula runs synchronously within the microprocessor chip. The PID control algorithm formula is expressed as:

[0035] In the proportional-integral-derivative control algorithm formula, This represents the duty cycle data of the microprocessor chip's computational output. The current time identifier representing discrete sampling. This represents the preset scaling factor of the microprocessor chip. This represents the state parameter of the temperature deviation accumulated by the adder circuit of the microprocessor chip at the current time. This represents the preset integral coefficient of the microprocessor chip. The identifier representing the integral variable used by the microprocessor chip to perform integral operations. The state parameter representing the temperature deviation of the accumulated output of the microprocessor chip under the continuous integral variable identifier. This represents the preset differential coefficients of the microprocessor chip. This represents the differential rate of change result of the microprocessor chip in response to temperature deviation. The system uses an example with a first weight value set to 0.7, a second weight value set to 0.3, a main feedback temperature variable mapped to 5℃, an auxiliary feedback temperature variable mapped to 3℃, and a preset fluctuation threshold of 2℃ for physical hardware and numerical substitution simulation. The microprocessor chip calls the underlying hardware multiplier to multiply the first weight value of 0.7 by the main feedback temperature variable of 5℃, obtaining a first product of 3.5℃. The microprocessor chip calls the underlying hardware multiplier to multiply the second weight value of 0.3 by the auxiliary feedback temperature variable of 3℃, obtaining a second product of 0.9℃. The microprocessor chip calls the adder circuit to add the first product of 3.5℃ to the second product of 0.9℃, outputting a temperature deviation of 4.4℃. The microprocessor chip executes a hardware comparison instruction to determine that the temperature deviation of 4.4℃ exceeds the preset fluctuation threshold of 2℃. The microprocessor chip triggers its internal floating-point unit to substitute the 4.4℃ temperature deviation, a proportional coefficient set to 10%, an integral coefficient set to 2%, and a derivative coefficient set to 5% into the proportional-integral-derivative (PID) control algorithm formula to perform low-level floating-point mathematical operations. The microprocessor chip ultimately calculates that the duty cycle data required to compensate for the 4.4℃ physical temperature difference is 85%. The microprocessor chip then transmits the packaged 85% duty cycle data to the heating execution module via the bus line.

[0036] The microprocessor chip internally constructs a multi-point temperature-weighted computation model and a proportional-integral-derivative (PID) control model. The microprocessor chip uses its arithmetic logic unit to extract discrete thermodynamic parameters from multiple spatial locations and maps these parameters to multi-level data nodes, thus constructing the spatial topology of the multi-point temperature-weighted computation model. Subsequently, the microprocessor chip configures the first and second weight values ​​as data addressing coefficients for the multi-point temperature-weighted computation model. The multi-point temperature-weighted computation model receives local temperature values ​​as input data and performs multiply-add matrix operations through the data addressing coefficients, thereby outputting the temperature deviation characterizing the global thermal field offset distribution. Simultaneously, the microprocessor chip extracts the scalar heat capacity and convective heat transfer coefficient of the natural rubber block to construct a PID control model. The PID control model receives the temperature deviation as an input parameter and uses a proportional amplifier, numerical integrator, and differential lead network to perform continuous time-domain processing on the temperature deviation, ultimately outputting duty cycle data that adjusts the actual conduction time ratio of the heating element.

[0037] For specific applications in natural rubber processing, the input and output data of the proportional-integral-derivative (PID) control algorithm running within the microprocessor chip have an inherent physical relationship. The input data represents local temperature values ​​at different spatial locations. The output data represents the duty cycle data driving the heating element. The microprocessor chip extracts the specific heat capacity parameter of the natural rubber block, set at 1.88 kJ / kg Kelvin, and the air convection heat transfer coefficient inside the drying chamber, set at 25 watts / m² Kelvin. The microprocessor chip calls the arithmetic logic unit to substitute the specific heat capacity parameter of 1.88 kJ / kg Kelvin and the air convection heat transfer coefficient of 25 watts / m² Kelvin into the thermodynamic heat transfer equation. The microprocessor chip calculates that the heat absorption scalar of the natural rubber block at a preset target temperature of 60℃ is 450 watts. Based on this 450 watt heat absorption scalar, the microprocessor chip sets a proportional coefficient of 10%, an integral coefficient of 2%, and a derivative coefficient of 5% as the initial reference parameters for the underlying floating-point operations. Local temperature values ​​at different spatial locations reflect the true physical thermal field distribution around the natural rubber block. The microprocessor chip uses a multi-point temperature weighted calculation formula to convert these local temperature values ​​into a 4.4℃ temperature deviation, comprehensively representing the thermodynamic offset distribution. This 4.4℃ temperature deviation serves as the sole input variable for the proportional-integral-derivative (PID) control algorithm in the underlying calculations. The microprocessor chip, combined with the set initial reference parameters, performs proportional amplification, integral accumulation, and differential lead calculations on the 4.4℃ temperature deviation. The microprocessor chip outputs 85% duty cycle data. This 85% duty cycle data directly controls the physical conversion rate of Joule heat released by the heating element into the drying chamber. The Joule heat released by the heating element achieves physical energy balance with the 450-watt heat absorption scalar of the natural rubber block. The data flow mechanism of the PID control algorithm deeply integrates digital variables with the physical heat absorption characteristics of the natural rubber block, clarifying the inherent physical mapping logic between input and output data.

[0038] As a further extension of the technical solution of the present invention, the following is a specific embodiment focusing on the underlying hardware collaboration and data processing verification mechanism: For the application scenarios of uneven airflow circulation and cold air intrusion in the drying room during the processing of natural rubber, the underlying physical hardware interaction and data acquisition verification path is as follows: thermocouples arranged on the first side wall, the second side wall and the central area of ​​the drying room synchronously sense the physical thermal radiation energy around the natural rubber block and convert the physical thermal radiation energy into analog electrical signals; the analog electrical signals specifically include continuously fluctuating weak voltage amplitude parameters and phase parameters.

[0039] The temperature acquisition module establishes electrical connections with multiple thermocouples, and its internal signal conditioning unit receives analog electrical signals output from these thermocouples. The signal conditioning unit performs hardware filtering on the analog signals to remove high-frequency noise, and simultaneously amplifies the signals to generate a conditioned signal, which is then sent to the analog-to-digital converter (ADC). The ADC receives the conditioned signal, performs discrete quantization according to a preset sampling rate, and converts the conditioned signal into a digital temperature signal. The digital temperature signal specifically includes channel identification codes corresponding to different physical spatial locations and discrete temperature characterization codes. Finally, the ADC unidirectionally transmits the digital temperature signal to the main control module within the control device.

[0040] In the physical transformation mechanism of data parsing and collaborative control within the main control module, the underlying matrix splicing logic and threshold judgment processing steps are as follows: The data receiving port within the main control module receives the digital temperature signal and transmits it to the microprocessor chip. The microprocessor chip receives and parses the channel identification code and discretized temperature characterization code within the digital temperature signal, extracting the local temperature values ​​corresponding to different spatial locations; the local temperature values ​​characterize the real-time thermodynamic scalar state of each specific monitoring node inside the drying chamber.

[0041] The microprocessor chip is pre-configured with a preset fluctuation threshold, a preset target temperature, a first weight value, and a second weight value. The microprocessor chip runs a multi-point temperature weighting calculation program, using the local temperature value corresponding to the first side wall as the main feedback temperature variable, and referencing the local temperature values ​​corresponding to the central area and the second side wall as auxiliary feedback temperature variables. Subsequently, the microprocessor chip calls the underlying multiplier logic gate circuit to perform a low-level multiplication operation on the first weight value and the main feedback temperature variable to obtain a first product, and simultaneously performs a low-level multiplication operation on the second weight value and the auxiliary feedback temperature variable to obtain a second product. The microprocessor chip then calls the adder logic gate circuit to perform an addition operation on the first product and the second product, obtaining a comprehensive temperature deviation characterizing the overall spatial thermodynamic shift distribution of the natural rubber drying chamber.

[0042] The microprocessor chip invokes a comparator circuit to perform a hardware-level voltage comparison between the temperature deviation and a preset fluctuation threshold. When the temperature deviation exceeds the reference voltage boundary defined by the preset fluctuation threshold, the microprocessor chip generates a power adjustment command containing duty cycle data. The duty cycle data is specifically defined as the ratio of the duration of the high-level state of the trigger pulse within a single pulse control cycle to the total time of the cycle. The microprocessor chip sends the power adjustment command to the command output port, which then receives the power adjustment command and sends it to the heating execution module.

[0043] Regarding the linkage between the power output of the heating execution module and the system safety defense, the specific hardware coordination and energy conversion logic is as follows: The power regulation component inside the heating execution module receives and parses the power regulation command, extracts the duty cycle data, and then generates a pulse supply voltage with a corresponding pulse width according to the duty cycle data. The power regulation component outputs the pulse supply voltage to the heating element arranged inside the drying chamber; the pulse supply voltage drives the heating element to generate Joule heat, and adjusts the effective electrical energy input of the heating element according to the conduction time of the pulse supply voltage, dynamically changing the physical heat released by the heating element to the natural rubber block.

[0044] The alarm module in the control device maintains bus communication and listening with the main control module. The microprocessor chip continuously compares the local temperature value with the preset safe temperature range. When the local temperature value exceeds the upper or lower limit of the preset safe temperature range, the main control module generates an alarm trigger level and sends the alarm trigger level to the alarm module. The drive circuit in the alarm module receives the alarm trigger level, performs power stage voltage amplification on the alarm trigger level to generate a power drive signal, and then sends the power drive signal to the audible and visual warning component installed at the physical device end. The audible and visual warning component receives the power drive signal, converts electrical energy into visible light signals and high-frequency sound wave signals, and issues a physical warning to the external work space.

Claims

1. A temperature control system for a natural rubber drying room, characterized in that, Includes physical equipment and control devices that establish communication connections with said physical equipment; The physical device includes multiple thermocouples and heating elements; the multiple thermocouples are distributed in multiple different spatial locations inside the drying chamber; the heating elements are arranged inside the drying chamber; the multiple thermocouples are electrically connected to the control device, and the heating elements are electrically connected to the control device. The control device includes a temperature acquisition module, a main control module, and a heating execution module; The temperature acquisition module establishes an electrical connection with multiple thermocouples, receives analog electrical signals output by multiple thermocouples, converts the analog electrical signals into digital temperature signals, and transmits the digital temperature signals unidirectionally to the main control module. The main control module is communicatively connected to the temperature acquisition module. The main control module receives the digital temperature signal, parses the digital temperature signal to extract the local temperature values ​​at different spatial locations, calculates the temperature deviation based on the local temperature values, generates a power adjustment command based on the temperature deviation, and sends the power adjustment command to the heating execution module. The heating execution module is communicatively connected to the main control module. The heating execution module receives the power adjustment command, parses the power adjustment command to extract the duty cycle data, adjusts the actual conduction time ratio of the heating element according to the duty cycle data, and adjusts the input power of the heating element.

2. The temperature control system for a natural rubber drying room according to claim 1, characterized in that, The temperature acquisition module includes a signal conditioning unit and an analog-to-digital conversion unit; the signal conditioning unit receives the analog electrical signal, performs hardware filtering and signal amplification on the analog electrical signal to generate a conditioning signal, and sends the conditioning signal to the analog-to-digital conversion unit; the analog-to-digital conversion unit receives the conditioning signal and converts the conditioning signal into the digital temperature signal.

3. The temperature control system for a natural rubber drying room according to claim 2, characterized in that, The main control module includes a data receiving port, a microprocessor chip, and an instruction output port. The data receiving port receives the digital temperature signal and transmits it to the microprocessor chip. The microprocessor chip receives the digital temperature signal, extracts the corresponding local temperature value from the digital temperature signal, calculates the temperature deviation, and compares the temperature deviation with a preset fluctuation threshold. When the temperature deviation exceeds the preset fluctuation threshold, the microprocessor chip generates a power adjustment instruction and sends it to the instruction output port. The instruction output port receives the power adjustment instruction and sends it to the heating execution module.

4. The temperature control system for a natural rubber drying room according to claim 3, characterized in that, The microprocessor chip has a first weight value and a second weight value. The microprocessor chip runs a multi-point temperature weighted calculation program, taking the local temperature value corresponding to one of the different spatial locations as the main feedback temperature variable, referring to the local temperature values ​​corresponding to the other different spatial locations as auxiliary feedback temperature variables, multiplying the first weight value by the main feedback temperature variable to obtain a first product, multiplying the second weight value by the auxiliary feedback temperature variable to obtain a second product, and adding the first product and the second product to obtain the temperature deviation.

5. The temperature control system for a natural rubber drying room according to claim 4, characterized in that, The drying chamber has a first side wall, a second side wall, and a central area; multiple thermocouples are respectively arranged on the first side wall, the second side wall, and the central area; wherein, two thermocouples are arranged on the first side wall, two thermocouples are arranged on the second side wall, and one thermocouple is arranged in the central area.

6. The temperature control system for a natural rubber drying room according to claim 5, characterized in that, The drying chamber has side walls and a ceiling; the thermocouples arranged on the first side wall and the second side wall are all on the same horizontal plane and are at a set distance from the side walls; the thermocouples arranged in the central area are located at a set installation height from the ceiling.

7. The temperature control system for a natural rubber drying room according to claim 6, characterized in that, The control device also includes an alarm module; the main control module compares the local temperature value with a preset safe temperature range, and when the local temperature value exceeds the preset safe temperature range, it generates an alarm trigger level and sends the alarm trigger level to the alarm module. The alarm module receives the alarm trigger level and generates an alarm signal.

8. The temperature control system for a natural rubber drying room according to claim 7, characterized in that, The physical device further includes an audible and visual warning component; the alarm module includes a driving circuit; the driving circuit receives the alarm trigger level, amplifies the alarm trigger level to generate a power driving signal, and sends the power driving signal to the audible and visual warning component; the audible and visual warning component receives the power driving signal and converts the power driving signal into a visible light signal and a high-frequency sound wave signal.

9. The temperature control system for a natural rubber drying room according to claim 8, characterized in that, The heating execution module includes a power adjustment component; the power adjustment component receives the power adjustment command, parses the power adjustment command to extract the duty cycle data, generates a pulse power supply voltage with a corresponding pulse width according to the duty cycle data, outputs the pulse power supply voltage to the heating element, and adjusts the power input of the heating element according to the conduction time of the pulse power supply voltage.

10. The temperature control system for a natural rubber drying room according to claim 9, characterized in that, The heating element releases heat into the drying chamber, causing a change in the ambient temperature inside the drying chamber; the multiple thermocouples sense the changed ambient temperature, generate an analog electrical signal, and transmit the analog electrical signal to the temperature acquisition module.

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