Electricity-to-heat temperature detection and control system, device and method

Abstract

The invention discloses an electricity-to-heat temperature detection and control system, device and method, which can realize continuous and comprehensive temperature detection in the whole heating process. Based on the real-time temperature information, the system can automatically adjust the heating power to ensure the temperature uniformity of the whole heating system, so that the heating system can stably operate under different working conditions and can basically and continuously maintain a preset temperature value.

Description

Technical Field

[0001] The present invention relates to the field of circuit technology, and in particular to an electric-to-heat temperature detection and control system, device and method. Background Art

[0002] With the widespread application of power-to-heat technologies, such as electric heating cables and electric heaters, in industrial and residential applications, the demand for precision and reliability in temperature detection and control is increasing. Temperature detection and control is one of the key technologies to ensure the safe and efficient operation of these products.

[0003] However, most existing temperature detection solutions usually install temperature sensors at one or several representative locations of the equipment, realize temperature detection by collecting the temperature signal of the point, and feed it back to the control system to adjust the heating power. It cannot fully reflect the temperature distribution of the entire heating system. In actual use, local temperatures may be too high or too low, resulting in product performance degradation or even damage; and its control system is difficult to achieve precise temperature regulation. For example, in complex working environments, such as frequent temperature changes or uneven loads, existing temperature control solutions are difficult to meet high-precision requirements, the temperature variation range is relatively large, and the temperature uniformity is poor.

[0004] To this end, the present invention provides an electric-to-heat temperature detection and control system, device, and method that enable continuous and comprehensive temperature monitoring throughout the entire heating process. Based on real-time temperature information, the system automatically adjusts heating power to ensure temperature uniformity throughout the heating system, enabling stable operation under varying operating conditions and consistently maintaining a predetermined temperature. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, this application provides an electric-to-heat temperature detection and control system, device, and method that enable continuous and comprehensive temperature detection throughout the entire heating process. Based on real-time temperature information, the system automatically adjusts heating power in real time to ensure temperature uniformity throughout the heating system, enabling stable operation under varying operating conditions and essentially maintaining a predetermined temperature.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] An electric-to-heat temperature detection and control system, comprising:

[0008] Microcontrol unit, power input module, thermistor alloy heating element, heating element resistance detection module, PID module and power adjustment module;

[0009] The power input module is connected to the micro control unit and an external power supply, and is used to convert the external power supply voltage into a voltage usable by the micro control unit;

[0010] The heating element resistance detection module is connected to the thermistor alloy heating element and the PID module respectively, and the heating element resistance detection module is used to detect the real-time resistance of the thermistor alloy heating element and output the real-time resistance to the PID module;

[0011] The PID module is connected to the micro-control unit, and the PID module compares the preset resistance value with the real-time resistance value and generates a comparison result. The PID module calculates the corresponding power output required to make the real-time resistance value reach the preset resistance value based on the comparison result, and outputs a signal of the corresponding power output power to the micro-control unit;

[0012] The power adjustment module is respectively connected to the thermistor alloy heating element, the micro control unit and the external power supply. The micro control unit sends a control signal to the power adjustment module according to the signal of the corresponding power output power. The power adjustment module adjusts the power output power delivered to the thermistor alloy heating element by the external power supply according to the control signal so that it reaches the size of the corresponding power output power.

[0013] As an improvement of the present application, the electric heat temperature detection and control system further includes a temperature and humidity detection module, which is connected to the micro control unit and is used to detect the temperature and humidity of the operating environment of the micro control unit.

[0014] As an improvement of the present application, the heating element resistance detection module includes a heating element current detection module and a heating element voltage detection module. The heating element current detection module is used to detect the real-time current signal flowing through the thermistor alloy heating element and send it to the microcontroller unit. The heating element voltage detection module is used to detect the real-time voltage signal of the thermistor alloy heating element and send it to the microcontroller unit. The microcontroller unit calculates the real-time resistance value based on the current current signal and the current voltage signal, and sends the real-time resistance value to the PID module.

[0015] As an improvement of the present application, the electric-to-heat temperature detection and control system also includes a preset temperature resistance module, which is connected to the PID module. The preset temperature resistance module is used to select the resistance corresponding to the thermistor alloy heating element when the thermistor alloy heating element is at the temperature value as the preset resistance value based on the temperature value input from the outside.

[0016] As an improvement of the present application, the electric heating temperature detection and control system also includes a serial port 1-RS485 circuit, and the heating element current detection module, the heating element voltage detection module and the PID module are connected to the micro control unit through the serial port 1-RS485 circuit.

[0017] As an improvement of the present application, the serial port 1-RS485 circuit includes a T1 serial port 1-RS485 circuit and a T2 serial port 1-RS485 circuit, the pins T1-RX, T1-RE and T1-TX of the T1 serial port 1-RS485 circuit are connected to the pins PC11, PD0 and PC10 of the micro control unit in sequence, and the pins T2-RX, T2-RE and T2-TX of the T2 serial port 1-RS485 circuit are connected to the pins PD2, PD1 and PC12 of the micro control unit in sequence.

[0018] As an improvement of the present application, the electric heat-to-temperature detection and control system also includes a network communication module and an I / O module. The network communication module is used to interact the data of the electric heat-to-temperature detection and control system with the cloud, and the I / O module is used to connect external input devices and output display devices.

[0019] An electric heating temperature detection and control device, comprising:

[0020] The device body and the electric heating temperature detection and control system as described in any of the above items;

[0021] The electric heating temperature detection and control system is arranged on the device body.

[0022] An electric heating temperature detection and control method is provided, which includes the following steps:

[0023] Reading the real-time resistance value of the thermistor alloy heating element;

[0024] Comparing the preset resistance value with the real-time resistance value, and calculating the corresponding electric output power required to make the real-time resistance value reach the preset resistance value;

[0025] outputting the signal corresponding to the electrical output power to the micro control unit;

[0026] The micro control unit controls the power adjustment module to adjust the power output power delivered by the external power source to the thermistor alloy heating element to reach the corresponding power output power.

[0027] As an improvement of the present application, the steps further include: selecting, based on the input temperature value, a resistance value corresponding to the thermistor alloy heating element when the thermistor alloy heating element is at the temperature value as a preset resistance value.

[0028] The present application provides an electric-to-heat temperature detection and control system, device, and method that enable continuous and comprehensive temperature detection throughout the entire heating process. Based on real-time temperature information, the system automatically adjusts heating power in real time to ensure temperature uniformity throughout the heating system, enabling stable operation under varying operating conditions and substantially maintaining a predetermined temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. The drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] The present application is further described below with reference to the accompanying drawings and examples.

[0031] Figure 1 This is a system block diagram of a type of electric-to-heat temperature detection and control system of the present application;

[0032] Figure 2 This is another system block diagram of the electric-to-heat temperature detection and control system of the present application;

[0033] Figure 3 This is a circuit diagram of the microcontroller unit of the electric-to-heat temperature detection and control system of the present application;

[0034] Figure 4 This is a circuit diagram of the power input module of the electric-to-heat temperature detection and control system of the present application;

[0035] Figure 5 This is a circuit diagram of the interface circuit of the heating element resistance detection module of the electric-to-heat temperature detection and control system of the present application;

[0036] Figure 6 This is a circuit diagram of the PID module interface circuit of the electric-to-heat temperature detection and control system of the present application;

[0037] Figure 7 This is the circuit diagram of the temperature and humidity detection module of the electric heat temperature detection and control system of the present application;

[0038] Figure 8 This is the circuit diagram of the serial port 1-RS485 circuit of the electric-to-heat temperature detection and control system of this application;

[0039] Figure 9 This is a schematic diagram of the heating element resistance detection module of the electric-to-heat temperature detection and control system of the present application;

[0040] Figure 10 This is a schematic diagram of the temperature and humidity detection module of the electric heat temperature detection and control system of the present application;

[0041] Figure 11 This is the first flow chart of the detection and control method of the electric-to-heat temperature detection and control system of the present application;

[0042] Figure 12 This is the second flow chart of the detection and control method of the electric-to-heat temperature detection and control system of the present application.

[0043] The detailed description of the reference numerals is as follows:

[0044] 1. Microcontroller unit; 2. Power input module; 3. Thermistor alloy heating element; 4. Heating element resistance detection module; 41. Heating element current detection module; 42. Heating element voltage detection module; 5. PID module; 6. Power adjustment module; 7. Temperature and humidity detection module; 71. Temperature detection module; 72. Humidity detection module; 8. Preset temperature resistance module; 9. Network communication module; 10. I / O module. DETAILED DESCRIPTION

[0045] Reference Figures 1 to 12 , an electric-to-heat temperature detection and control system, comprising:

[0046] Microcontrol unit 1, power input module 2, thermistor alloy heating element 3, heating element resistance detection module 4, PID module 5 and power adjustment module 6;

[0047] The power input module 2 is connected to the micro control unit 1 and an external power supply, and is used to convert the external power supply voltage into a voltage usable by the micro control unit 1;

[0048] The heating element resistance detection module 4 is connected to the thermistor alloy heating element 3 and the PID module 5 respectively, and the heating element resistance detection module 4 is used to detect the real-time resistance of the thermistor alloy heating element 3 and output the real-time resistance to the PID module 5;

[0049] The PID module 5 is connected to the micro control unit 1. The PID module 5 compares the preset resistance value with the real-time resistance value and generates a comparison result. The PID module 5 calculates the corresponding power output required to make the real-time resistance value reach the preset resistance value based on the comparison result, and outputs a signal of the corresponding power output power to the micro control unit 1.

[0050] The power adjustment module 6 is respectively connected to the thermistor alloy heating element 3, the micro control unit 1 and the external power supply. The micro control unit 1 sends a control signal to the power adjustment module 6 according to the signal of the corresponding power output power. The power adjustment module 6 adjusts the power output power delivered by the external power supply to the thermistor alloy heating element 3 according to the control signal so that it reaches the size of the corresponding power output power.

[0051] Through the setting of the above structure, an electric heating temperature detection and control system is provided, which can realize continuous and comprehensive temperature detection of the entire heating process. Based on the real-time temperature information, the system can automatically adjust the heating power to ensure the temperature uniformity of the entire heating system, so that it can operate stably under different working conditions and basically maintain a predetermined temperature value; it predetermines the resistance value corresponding to the thermistor alloy heating element 3 at the target temperature as a preset resistance value, and stores the value in the system. The power input module 2 converts the external power supply such as 220V AC into the voltage required by the micro control unit 1, such as 5V, 3.3V, to power the micro control unit 1. The heating element resistance detection module 4 collects the resistance value of the heating element in real time and transmits the data to the PID module 5. Since the resistance value of the thermistor is monotonically related to the temperature, such as the resistance value of the PTC thermistor increases with the increase of temperature, the real-time resistance value can directly reflect the current temperature, and the PID module 5 calculates the deviation between the preset resistance value and the real-time resistance value.

[0052] e(t)=R 预预 -R 实时 ,

[0053] And the control quantity is generated through the proportional P, integral I, and differential D formulas:

[0054]

[0055] The control amount corresponds to the target power output power required to make the real-time resistance value approach the preset resistance value, such as the adjustment amount of voltage or current.

[0056] The PID module 5 outputs the calculation result to the microcontroller unit 1, which generates a control instruction based on the signal. If the power adjustment module 6 is a thyristor voltage regulator, the microcontroller unit 1 outputs an analog signal to control the output voltage of the power adjustment module 6. If the power adjustment module 6 is a solid-state relay, the microcontroller unit 1 outputs a switching signal to control the on-off frequency of the power adjustment module 6 per unit time.

[0057] The power adjustment module 6, such as a thyristor voltage regulator, a solid-state relay, etc., adjusts the electric power input to the heating element according to the instructions of the micro control unit 1:

[0058] If the real-time resistance value is less than the preset resistance value, the temperature is too low, so increase the power output to speed up the temperature rise;

[0059] If the real-time resistance value is greater than the preset resistance value, the temperature is too high, and the power output is reduced to suppress the temperature rise.

[0060] This process is repeated to form a closed-loop control, and ultimately the resistance value, i.e., the temperature, of the thermistor alloy heating element 3 is stabilized near a preset value. The PID algorithm dynamically compensates for the resistance deviation, which can suppress interference such as power supply fluctuations and ambient temperature changes, thereby achieving high-precision temperature control. The high frequency of real-time resistance detection is determined by the sampling rate of the microcontroller unit 1, and the response speed is fast, so that the temperature can be maintained in a smaller range around the preset temperature.

[0061] Optional, such as Figure 3 As shown, the microcontroller unit 1 is of model STM32F407VET6.

[0062] It should be understood that the preset resistance value can be stored in the storage structure inside the electric heating temperature detection and control system of the present application, or in an external storage structure, or can be transmitted to the cloud and stored in the PID module 5, as long as it can be transmitted to the PID module 5 when it is compared with the real-time resistance value.

[0063] It should be understood that the preset resistance value refers to the resistance value of the thermistor alloy heating element 3 when it is at a temperature set by the user.

[0064] In this embodiment, the electric heat temperature detection and control system further includes a temperature and humidity detection module 7 , which is connected to the micro control unit 1 and is used to detect the temperature and humidity of the operating environment of the micro control unit 1 .

[0065] Through the setting of the above structure, the temperature and relative humidity of the operating environment of the microcontroller unit 1 can be collected in real time, and timely feedback can be given when the ambient temperature and relative humidity of the microcontroller unit 1 are abnormal, thereby avoiding problems such as circuit short circuit, component corrosion, calculation error, program jamming and even hardware damage caused by the chip due to temperature and humidity. For example, when the temperature and humidity of the operating environment of the microcontroller unit 1 are abnormal, the temperature and humidity detection module 7 can feedback the abnormality to the microcontroller unit 1, and the microcontroller unit 1 feedbacks the abnormality to the outside world through the error reporting device to minimize the abnormal risk and loss; wherein, the error reporting device can be an error light, a display device or a signal transmission device.

[0066] Optionally, the temperature and humidity detection module 7 includes a temperature detection module 71 and a humidity detection module 72 , wherein the temperature detection module 71 is used to detect the temperature of the operating environment of the micro control unit 1 , and the humidity detection module 72 is used to detect the relative humidity of the operating environment of the micro control unit 1 .

[0067] In this embodiment, the electric-to-heat temperature detection and control system further includes a comprehensive fault indicator light, which is used to reflect the real-time operating status of the electric-to-heat temperature detection and control system.

[0068] Through the setting of the above structure, the comprehensive fault indicator light can display in real time and intuitively whether the system has comprehensive fault conditions such as temperature detection abnormality, control module failure, power supply abnormality or component operation exceeding the limit through visual methods such as light color and flashing frequency. This is convenient for operation and maintenance personnel to quickly locate system hidden dangers and take maintenance measures in time, effectively improving the safety, reliability and fault handling efficiency of the electric heat conversion system, and realizing convenient monitoring and management of the system's full working condition operation status.

[0069] Optionally, when the temperature and humidity detection module 7 detects that the temperature and humidity of the operating environment of the micro control unit 1 are abnormal, an alarm may be issued through the comprehensive fault indicator light.

[0070] In this embodiment, the heating element resistance detection module 4 includes a heating element current detection module 41 and a heating element voltage detection module 42. The heating element current detection module 41 is used to detect the real-time current signal flowing through the thermistor alloy heating element 3 and send it to the microcontroller unit 1. The heating element voltage detection module 42 is used to detect the real-time voltage signal of the thermistor alloy heating element 3 and send it to the microcontroller unit 1. The microcontroller unit 1 calculates the real-time resistance value based on the current current signal and the current voltage signal, and sends the real-time resistance value to the PID module 5.

[0071] By setting up the above structure, the independent heating element current detection module 41 and heating element voltage detection module 42 are used to directly obtain the real-time voltage U and current I at both ends of the heating element, which can avoid the hysteresis and other errors of indirect measurement.

[0072] In this embodiment, the electric-to-heat temperature detection and control system also includes a preset temperature resistance module 8, which is connected to the PID module 5. The preset temperature resistance module 8 is used to select the resistance corresponding to the thermistor alloy heating element 3 when the thermistor alloy heating element 3 is at the temperature value input from the outside as the preset resistance value.

[0073] By setting the preset temperature resistance module 8, the system can flexibly select the preset resistance according to different needs during operation, that is, it can easily switch different target temperatures. This flexibility enables the system to adapt to a variety of different working scenarios and process requirements, and if the system needs to be upgraded or optimized later, such as improving the material or process of the heating element, resulting in changes in its temperature-resistance characteristics, it is only necessary to update the data in the preset temperature resistance module 8 without making large-scale changes to the entire control system. It has good scalability. At the same time, as the heating element is used, its performance may change to a certain extent. For example, factors such as aging may cause its temperature-resistance characteristics to change. The preset temperature resistance module 8 can store multiple temperature-resistance correspondences, and the system can dynamically adjust the preset resistance according to actual conditions, thereby compensating for changes in the performance of the heating element and ensuring that the system can stably achieve temperature control at different stages.

[0074] In this embodiment, the electric heating temperature detection and control system further includes a serial port 1-RS485 circuit, and the heating element current detection module 41, the heating element voltage detection module 42 and the PID module 5 are connected to the micro control unit 1 through the serial port 1-RS485 circuit.

[0075] like Figure 8 As shown, the serial port 1-RS485 circuit realizes multi-module collaboration through the unified RS485 bus protocol, supports long-distance, anti-interference data interaction, and provides a reliable communication foundation for real-time monitoring, precise control and fault protection of the electric heating system. In addition, connecting through the serial port 1-RS485 circuit can also simplify the maintenance process by dividing the modules, making it easier to replace the components when they are damaged.

[0076] In this embodiment, the serial port 1-RS485 circuit includes a T1 serial port 1-RS485 circuit and a T2 serial port 1-RS485 circuit. The pins T1-RX, T1-RE and T1-TX of the T1 serial port 1-RS485 circuit are connected to the pins PC11, PD0 and PC10 of the micro control unit 1 in sequence. The pins T2-RX, T2-RE and T2-TX of the T2 serial port 1-RS485 circuit are connected to the pins PD2, PD1 and PC12 of the micro control unit 1 in sequence.

[0077] By precisely connecting the pins of the T1 / T2 circuit of the serial port 1-RS485 circuit to the PC10-PC12 and PD0-PD2 of the microcontroller unit 1, independent control and parallel communication of the dual RS485 channels are achieved, providing an efficient and reliable data interaction channel for peripherals such as the current and voltage module and the PID module 5. This design fully utilizes the multiple USART resources and GPIO multiplexing function of the microcontroller unit 1, supports modular expansion, and enhances the system's anti-interference ability and fault tolerance in industrial environments. For example, the T1 channel is connected to the PID module 5 to transmit control instructions and feedback data in real time, and the T2 channel is connected to the heating element current detection module 41 and the heating element voltage detection module 42 to regularly collect the operating current / voltage of the thermistor alloy heating element.

[0078] In this embodiment, the electric heat-to-temperature detection and control system further includes a network communication module 9 and an I / O module 10. The network communication module 9 is used to exchange data of the electric heat-to-temperature detection and control system with the cloud, and the I / O module 10 is used to connect to external input devices and output display devices.

[0079] Through the setting of the above structure, the network communication module 9 enables the system to exchange data with the cloud. A large amount of data generated during the operation of the system, such as the real-time current, voltage, temperature, resistance and other data of the heating element, can be uploaded to the cloud server for storage. The cloud has a strong storage capacity, which can avoid the problem of limited local storage capacity. Moreover, with the help of data analysis tools and algorithms in the cloud, these data can be deeply mined and analyzed, such as analyzing the operating rules of the equipment, predicting equipment failures, evaluating system energy efficiency, etc., providing a strong basis for the optimization and improvement of the system. The I / O module 10 is connected to external input devices such as keyboards and touch screens, and users can use these devices to conveniently set parameters, select modes, and perform other operations on the system. At the same time, output display devices such as display screens and indicator lights can intuitively display information such as the system's operating status, temperature setting values, and real-time measurement values to the user, so that the user can clearly understand the working conditions of the system. This diversified operation and display method enhances the interactive experience between the user and the system and reduces the difficulty of operation.

[0080] In this embodiment, the electric-to-heat temperature detection and control system further includes an external FLASH module, and the external FLASH module is used to provide additional storage space for the electric-to-heat temperature detection and control system.

[0081] Through the above-mentioned configuration, the external FLASH module implements functions such as parameter storage and logging, ensuring that the device retains key configurations even after power failure. Its design takes into account communication speed, data security, and erase and write life, improving the system's intelligence and configurability.

[0082] The electric heating temperature detection and control device of this embodiment includes a device body and the electric heating temperature detection and control system as described in the above embodiment; wherein the electric heating temperature detection and control system is arranged on the device body.

[0083] Through the setting of the above structure, an electric heating temperature detection and control system is provided, which can realize continuous and comprehensive temperature detection of the entire heating process. Based on the real-time temperature information, the system can automatically adjust the heating power to ensure the temperature uniformity of the entire heating system, so that it can operate stably under different working conditions; it predetermines the resistance value corresponding to the thermistor alloy heating element 3 at the target temperature as a preset resistance value, and stores the value in the system. The power input module 2 converts the external power supply such as 220V AC into the voltage required by the micro control unit 1, such as 5V, 3.3V, to power the micro control unit 1. The heating element resistance detection module 4 collects the resistance value of the heating element in real time and transmits the data to the PID module 5. Since the resistance value of the thermistor is monotonically related to the temperature, such as the resistance value of the PTC thermistor increases with the increase of temperature, the real-time resistance value can directly reflect the current temperature, and the PID module 5 calculates the deviation between the preset resistance value and the real-time resistance value.

[0084] e(t)=R 预设 -R 实时 ,

[0085] And the control quantity is generated through the proportional P, integral I, and differential D formulas:

[0086]

[0087] The control amount corresponds to the target power output power required to make the real-time resistance value approach the preset resistance value, such as the adjustment amount of voltage or current.

[0088] The PID module 5 outputs the calculation result to the microcontroller unit 1, which generates a control instruction based on the signal. If the power adjustment module 6 is a thyristor voltage regulator, the microcontroller unit 1 outputs an analog signal to control the output voltage of the power adjustment module 6. If the power adjustment module 6 is a solid-state relay, the microcontroller unit 1 outputs a switching signal to control the on-off frequency of the power adjustment module 6 per unit time.

[0089] The power adjustment module 6, such as a thyristor voltage regulator, a solid-state relay, etc., adjusts the electric power input to the heating element according to the instructions of the micro control unit 1:

[0090] If the real-time resistance value is less than the preset resistance value, the temperature is too low, so increase the power output to speed up the temperature rise;

[0091] If the real-time resistance value is greater than the preset resistance value, the temperature is too high, and the power output is reduced to suppress the temperature rise.

[0092] This process is repeated to form a closed-loop control, and ultimately the resistance value, i.e., the temperature, of the thermistor alloy heating element 3 is stabilized near a preset value. The PID algorithm dynamically compensates for the resistance deviation, which can suppress interference such as power supply fluctuations and ambient temperature changes, thereby achieving high-precision temperature control. The high frequency of real-time resistance detection is determined by the sampling rate of the microcontroller unit 1, and the response speed is fast, so that the temperature can be maintained in a smaller range around the preset temperature.

[0093] Optional, such as Figure 3 As shown, the microcontroller unit 1 is of model STM32F407VET6.

[0094] It should be understood that the preset resistance value can be stored in the storage structure inside the electric heating temperature detection and control system of the present application, or in an external storage structure, or can be transmitted to the cloud and stored in the PID module 5, as long as it can be transmitted to the PID module 5 when it is compared with the real-time resistance value.

[0095] It should be understood that the preset resistance value refers to the resistance value of the thermistor alloy heating element 3 when it is at a temperature set by the user.

[0096] An electric heating temperature detection and control method is provided, which includes the following steps:

[0097] Preset the resistance value corresponding to a temperature value of the thermistor alloy heating element 3 to be a preset resistance value;

[0098] Reading the real-time resistance value of the thermistor alloy heating element 3;

[0099] Comparing the preset resistance value with the real-time resistance value, and calculating the corresponding electric output power required to make the real-time resistance value reach the preset resistance value;

[0100] Outputting the signal corresponding to the electrical output power to the micro control unit 1;

[0101] The micro control unit 1 controls the power adjustment module 6 to adjust the power output from the external power source to the thermistor alloy heating element 3 to reach the corresponding power output power.

[0102] The above method allows for continuous and comprehensive temperature monitoring throughout the heating process. Based on real-time temperature information, the system automatically adjusts heating power to ensure temperature uniformity throughout the heating system, enabling stable operation under varying operating conditions and maintaining a consistent, predetermined temperature.

[0103] In this embodiment, the steps further include: selecting, according to the input temperature value, a resistance value corresponding to the thermistor alloy heating element 3 when the thermistor alloy heating element 3 is at the temperature value as a preset resistance value.

[0104] Through the setting of the above method, the preset resistance value can be flexibly selected according to different needs during operation, that is, different target temperatures can be easily switched. This flexibility enables the method to adapt to a variety of different working scenarios and process requirements, and if the material or process of the heating element is subsequently improved, resulting in changes in its temperature-resistance characteristics, only the input temperature value needs to be updated without the need for large-scale changes, and it has good scalability. At the same time, as the heating element is used, its performance may change to a certain extent. For example, factors such as aging may cause its temperature-resistance characteristics to change. This step also makes it possible to dynamically adjust the preset resistance value according to actual conditions, thereby compensating for changes in the performance of the heating element and ensuring that the system can stably achieve temperature control at different stages.

[0105] The above descriptions are provided in conjunction with specific content to provide one or more embodiments, and the specific implementation of the present invention is not limited to these descriptions. Any similarity or similarity with the methods, structures, etc. of the present invention, or any technical deduction or substitution based on the concept of the present invention, shall be considered within the scope of protection of the present invention.

Claims

1. An electric heating temperature detection and control system, characterized in that: include: A microcontrol unit (1), a power input module (2), a thermistor alloy heating element (3), a heating element resistance detection module (4), a PID module (5) and a power adjustment module (6); The power input module (2) is connected to the micro control unit (1) and an external power source, and the power input module (2) is used to convert the external power source voltage into a voltage usable by the micro control unit (1); The heating element resistance detection module (4) is connected to the thermistor alloy heating element (3) and the PID module (5), respectively. The heating element resistance detection module (4) is used to detect the real-time resistance of the thermistor alloy heating element (3) and output the real-time resistance to the PID module (5); The PID module (5) is connected to the micro control unit (1), and the PID module (5) compares a preset resistance value with the real-time resistance value and generates a comparison result. The PID module (5) calculates the corresponding electric output power required to make the real-time resistance value reach the preset resistance value based on the comparison result, and outputs a signal of the corresponding electric output power to the micro control unit (1); The power adjustment module (6) is respectively connected to the thermistor alloy heating element (3), the micro control unit (1) and the external power supply. The micro control unit (1) sends a control signal to the power adjustment module (6) according to the signal of the corresponding power output power. The power adjustment module (6) adjusts the power output power transmitted by the external power supply to the thermistor alloy heating element (3) according to the control signal so that the power output power reaches the size of the corresponding power output power.

2. The electric heating temperature detection and control system according to claim 1, characterized in that: The electric heat transfer temperature detection and control system further comprises a temperature and humidity detection module (7), which is connected to the micro control unit (1) and is used to detect the temperature and humidity of the operating environment of the micro control unit (1).

3. The electric heating temperature detection and control system according to claim 1, characterized in that: The heating element resistance detection module (4) comprises a heating element current detection module (41) and a heating element voltage detection module (42), wherein the heating element current detection module (41) is used to detect a real-time current signal flowing through the thermistor alloy heating element (3) and send it to the microcontroller unit (1), and the heating element voltage detection module (42) is used to detect a real-time voltage signal of the thermistor alloy heating element (3) and send it to the microcontroller unit (1), and the microcontroller unit (1) calculates a real-time resistance value based on the current current signal and the current voltage signal, and sends the real-time resistance value to the PID module (5).

4. The electric heating temperature detection and control system according to claim 1, characterized in that: The electric-to-heat temperature detection and control system further comprises a preset temperature resistance module (8), the preset temperature resistance module (8) being connected to the PID module (5), and the preset temperature resistance module (8) being used to select, based on a temperature value input from the outside, a resistance value corresponding to the thermistor alloy heating element (3) when the thermistor alloy heating element (3) is at the temperature value as a preset resistance value.

5. The electric heating temperature detection and control system according to claim 3, characterized in that: The electric heating temperature detection and control system further comprises a serial port 1-RS485 circuit, and the heating element current detection module (41), the heating element voltage detection module (42) and the PID module (5) are connected to the micro control unit (1) via the serial port 1-RS485 circuit.

6. The electric heating temperature detection and control system according to claim 5, characterized in that: The serial port 1-RS485 circuit includes a T1 serial port 1-RS485 circuit and a T2 serial port 1-RS485 circuit, wherein the pins T1-RX, T1-RE and T1-TX of the T1 serial port 1-RS485 circuit are sequentially connected to the pins PC11, PD0 and PC10 of the micro control unit (1), and the pins T2-RX, T2-RE and T2-TX of the T2 serial port 1-RS485 circuit are sequentially connected to the pins PD2, PD1 and PC12 of the micro control unit (1).

7. The electric heating temperature detection and control system according to claim 1, characterized in that: The electric heat transfer temperature detection and control system further comprises a network communication module (9) and an I / O module (10). The network communication module (9) is used to exchange data of the electric heat transfer temperature detection and control system with the cloud, and the I / O module (10) is used to connect external input devices and output display devices.

8. An electric heating temperature detection and control device, characterized in that: include: The device body and the electric heating temperature detection and control system according to any one of claims 1 to 7; The electric heating temperature detection and control system is arranged on the device body.

9. An electric heating temperature detection and control method, providing an electric heating temperature detection and control system according to any one of claims 1 to 7, characterized in that: The following steps are involved: Reading the real-time resistance value of the thermistor alloy heating element (3); Comparing the preset resistance value with the real-time resistance value, and calculating the corresponding electric output power required to make the real-time resistance value reach the preset resistance value; Outputting the signal corresponding to the electrical output power to the micro control unit (1); The micro control unit (1) controls the power adjustment module (6) to adjust the power output power delivered by the external power source to the thermistor alloy heating element (3) to reach the corresponding power output power.

10. The method for detecting and controlling the temperature of the electric heating device according to claim 9, wherein: The step further comprises: selecting, based on the input temperature value, a resistance value corresponding to the thermistor alloy heating element (3) when the thermistor alloy heating element (3) is at the temperature value as a preset resistance value.

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