Graphene-based vehicle door handle heating method, system and equipment and storage medium

Abstract

The invention discloses a graphene-based vehicle door handle heating method, system and device and a storage medium, graphene heating cloth is installed in a vehicle door handle structure, a temperature controller is connected with the graphene heating cloth through an electric beam, and a mobile terminal is in communication connection with the temperature controller. Controlling a temperature controller to collect a first temperature and a second temperature corresponding to the graphene heating cloth; performing smooth filtering processing on the first temperature and the second temperature to obtain a current target temperature; determining a current temperature deviation according to the current target temperature and the expected temperature; based on the current temperature deviation, a preset period PWM voltage signal is determined according to the rate proportion control parameter, the deviation integral control parameter and the deviation differential control parameter, and a heating actuator arranged in the graphene heating cloth is driven through the preset period PWM voltage signal to conduct heating. The graphene heating cloth is controlled to work through the mobile terminal, and intelligent temperature control of the graphene heating cloth is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of heating control, and particularly relates to a graphene-based door handle heating method, system, device, and storage medium. Background Art

[0002] With the development of technology and the improvement of people's living standards, cars have become an essential means of transportation in people's daily lives. However, in winter, car door handles are often frozen, making it impossible for car owners to open the door handles normally, thus affecting the travel of car owners. In the prior art, heaters are used to heat the door handles, or electric heating wires are installed inside the door handles to melt the ice and frost on the door handles. Although the existing solutions can solve the problem of frozen door handles to a certain extent, they still have some problems and disadvantages. First, using heaters to heat the door handles consumes a large amount of electric energy, which burdens the car's battery. Especially in winter when the temperature is low, the performance of the car's battery will be affected, thus affecting the effect of the heater. Second, the existing control methods for electric heating wires are relatively simple and cannot be accurately controlled according to actual needs, which may cause the door handles to be overheated or overcooled, thus affecting the use effect. Therefore, how to achieve precise temperature control while reducing vehicle energy consumption has become an urgent technical problem to be solved.

[0003] The above content is only used to assist in understanding the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The main object of the present invention is to provide a graphene-based door handle heating method, system, device, and storage medium, aiming to solve the technical problem of how to achieve precise temperature control while reducing vehicle energy consumption.

[0005] To achieve the above object, the present invention provides a graphene-based door handle heating method. The graphene heating cloth is installed inside the door handle structure body, and the temperature controller is connected to the graphene heating cloth through an electric beam. The mobile terminal is communicatively connected to the temperature controller. The graphene-based door handle heating method includes:

[0006] Within a preset time, control the temperature controller to collect the first temperature and the second temperature corresponding to the graphene heating cloth;

[0007] Perform a smoothing filter process on the first temperature and the second temperature to obtain the current target temperature;

[0008] Determine the current temperature deviation according to the current target temperature and the desired temperature, and calculate the rate proportional control parameter, deviation integral control parameter, and deviation differential control parameter according to the current temperature deviation;

[0009] Determine a preset period PWM voltage signal based on the rate proportional control parameter, the deviation integral control parameter, and the deviation differential control parameter, and drive a heating actuator built in the graphene heating cloth through the preset period PWM voltage signal to heat the door handle.

[0010] Optionally, the step of calculating the rate proportional control parameter according to the current temperature deviation includes:

[0011] Perform look-up table linear interpolation on the current temperature deviation to obtain a first proportional parameter and a second proportional parameter;

[0012] Determine a target proportional parameter according to the first proportional parameter and the second proportional parameter;

[0013] Calculate the rate proportional control parameter according to the target proportional parameter, the current temperature deviation, and the integration period.

[0014] Optionally, the step of calculating the deviation integral control parameter according to the current temperature deviation includes:

[0015] Determine a deviation integral according to the current temperature deviation, and determine whether the deviation integral is within a preset integral range;

[0016] If so, calculate the deviation integral control parameter according to the deviation integral, the target proportional parameter, and the integration period.

[0017] Optionally, the step of calculating the deviation differential control parameter according to the current temperature deviation includes:

[0018] Determine the previous temperature deviation corresponding to the current temperature deviation;

[0019] Calculate a deviation difference between the current temperature deviation and the previous temperature deviation;

[0020] Calculate the deviation differential control parameter according to the deviation difference, the differential period, the integration period, and the target proportional parameter.

[0021] Optionally, the step of determining the preset period PWM voltage signal based on the rate proportional control parameter, the deviation integral control parameter, and the deviation differential control parameter includes:

[0022] Determine a preset initial duty ratio of the PWM voltage signal;

[0023] Calculate the preset period PWM voltage signal according to the rate proportional control parameter, the deviation integral control parameter, the deviation differential control parameter, and the preset initial duty ratio.

[0024] Optionally, the step of driving the heating actuator built in the graphene heating cloth to heat the door handle by the preset periodic PWM voltage signal includes:

[0025] Perform fixed-point processing on the preset periodic PWM voltage signal to obtain a fixed-point PWM voltage signal;

[0026] Perform amplitude limiting and smoothing processing on the fixed-point preset periodic PWM voltage signal, and drive the heating actuator built in the graphene heating cloth to heat the door handle by the processed preset periodic PWM voltage signal.

[0027] In addition, to achieve the above object, the present invention also provides a graphene-based door handle heating system. The graphene heating cloth is installed inside the door handle structure body, and the temperature controller is connected to the graphene heating cloth through an electric beam. The mobile terminal is communicatively connected to the temperature controller. The graphene-based door handle heating system includes:

[0028] An acquisition module, configured to control the temperature controller to collect a first temperature and a second temperature corresponding to the graphene heating cloth within a preset time;

[0029] A processing module, configured to perform smoothing filtering processing on the first temperature and the second temperature to obtain a current target temperature;

[0030] A calculation module, configured to determine a current temperature deviation according to the current target temperature and the desired temperature, and calculate a rate proportional control parameter, a deviation integral control parameter, and a deviation differential control parameter according to the current temperature deviation;

[0031] A control module, configured to determine a preset periodic PWM voltage signal based on the rate proportional control parameter, the deviation integral control parameter, and the deviation differential control parameter, and drive the heating actuator built in the graphene heating cloth to heat the door handle by the preset periodic PWM voltage signal.

[0032] In addition, to achieve the above object, the present invention also provides a graphene-based door handle heating device. The device includes: a memory, a processor, and a graphene-based door handle heating program stored on the memory and executable on the processor. The graphene-based door handle heating program is configured to implement the steps of the graphene-based door handle heating method as described above.

[0033] In addition, to achieve the above object, the present invention also provides a storage medium. A graphene-based door handle heating program is stored on the storage medium. When the graphene-based door handle heating program is executed by a processor, the steps of the graphene-based door handle heating method as described above are implemented.

[0034] Within a preset time, the present invention first controls a thermostat to collect a first temperature and a second temperature corresponding to a graphene heating cloth, performs a smoothing filter process on the first temperature and the second temperature to obtain a current target temperature, then determines a current temperature deviation based on the current target temperature and an expected temperature, and calculates a rate proportional control parameter, a deviation integral control parameter, and a deviation differential control parameter according to the current temperature deviation. After that, a preset period PWM voltage signal is determined based on the rate proportional control parameter, the deviation integral control parameter, and the deviation differential control parameter. Finally, a heating actuator built in the graphene heating cloth is driven by the preset period PWM voltage signal to heat the door handle. The graphene material of the present invention has excellent thermal conductivity and can make the door handle reach an ideal thawing temperature in a short time. The graphene heating cloth continues to work through control by a mobile terminal, thus avoiding the inconvenience of the vehicle owner having to manually thaw the door handle, and further realizing intelligent temperature control of the graphene heating cloth, improving the convenience and comfort of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a schematic structural diagram of a graphene-based door handle heating device in a hardware operating environment related to the embodiment solution of the present invention;

[0036] Figure 2 is a structural diagram of the installation of a graphene heating cloth in the first embodiment of the graphene-based door handle heating method of the present invention;

[0037] Figure 3 is a schematic flowchart of the first embodiment of the graphene-based door handle heating method of the present invention;

[0038] Figure 4 is a structural block diagram of the first embodiment of the graphene-based door handle heating system of the present invention.

[0039] The realization, functional features, and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0040] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0041] Refer to Figure 1 , Figure 1 is a schematic structural diagram of a graphene-based door handle heating device in a hardware operating environment related to the embodiment solution of the present invention.

[0042] As Figure 1As shown in the figure, the graphene-based door handle heating device may include: a processor 1001, such as a Central Processing Unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen and an input unit such as a keyboard. Optionally, the user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a Wireless-Fidelity (Wi-Fi) interface). The memory 1005 may be a high-speed Random Access Memory (RAM) or a stable non-volatile memory (Non-Volatile Memory, NVM), such as a disk memory. Optionally, the memory 1005 may also be a storage system independent of the aforementioned processor 1001.

[0043] Those skilled in the art can understand that Figure 1 the structure shown in the figure does not constitute a limitation on the graphene-based door handle heating device, and it may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements.

[0044] As Figure 1 shown, the memory 1005, as a storage medium, may include an operating system, a network communication module, a user interface module, and a graphene-based door handle heating program.

[0045] In Figure 1 the graphene-based door handle heating device shown in the figure, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with users; the processor 1001 and the memory 1005 in the graphene-based door handle heating device of the present invention may be arranged in the graphene-based door handle heating device. The graphene-based door handle heating device calls the graphene-based door handle heating program stored in the memory 1005 through the processor 1001 and executes the graphene-based door handle heating method provided by the embodiments of the present invention.

[0046] In a specific implementation, referring to Figure 2 , Figure 2 is the installation structure diagram of the graphene heating cloth for the first embodiment of the graphene-based door handle heating method of the present invention. Figure 2Among them, 101 is a graphene heating cloth, 102 is a car door, 103 is a thermostat, and 104 is a mobile terminal. Among them, the graphene heating cloth 101 is installed inside the car door 102 near the door handle. The thermostat 103 gets power from the vehicle through a power cable harness. The graphene heating cloth 101 is connected to the thermostat 103 through a wire harness. The in-vehicle graphene door handle heating system built into the mobile terminal 104 communicates with the thermostat 103 via Bluetooth to achieve precise temperature control of the graphene heating cloth 101.

[0047] It should also be noted that the size of the heating cloth needs to be confirmed with the automobile factory in advance, and it can be customized according to different vehicle models and installed inside the door handle structure. The thermostat can be built into the vehicle or externally connected to the vehicle. The thermostat is a multi-channel control and can be connected to multiple graphene heating cloths. Figure 2 Among them, the thermostat is a 6-channel control. In this embodiment, four types of controllers corresponding to 2 / 4 / 6 / 8 channels can be designed according to user needs.

[0048] An embodiment of the present invention provides a graphene-based door handle heating method. Refer to Figure 3 , Figure 3 which is a schematic flowchart of the first embodiment of the graphene-based door handle heating method of the present invention.

[0049] In this embodiment, the graphene-based door handle heating method includes the following steps:

[0050] Step S10: Control the thermostat to collect the first temperature and the second temperature corresponding to the graphene heating cloth within a preset time.

[0051] It is easy to understand that the execution subject of this embodiment can be a mobile terminal with functions such as data processing, network communication, and program running. The in-vehicle graphene door handle heating system (i.e., the intelligent temperature control APP) is built into the mobile terminal, or it can be other computer devices with similar functions. This embodiment is not limited.

[0052] The mobile terminal can expand functions such as remote start, online upgrade, adaptive temperature adjustment, and automatic heating on / off.

[0053] Before temperature control, parameter reset and update are also required. The code for parameter reset and update is as follows:

[0054] static void htclth_actr_ctrl_reset(uint8 htr){

[0055] v_htclth_ctrl[htr].e_s = 0;

[0056] v_htclth_ctrl[htr].e_1 = 0;

[0057] v_htclth_ctrl[htr].u_1 = 0;

[0058] v_htclth_ctrl[htr].phs = HTCLTH_CTRL_PHS_RST;

[0059] }

[0060] / *Parameter update* /

[0061] static void htclth_actr_ctrl_update(uint8 htr, sint16 e_k, uint16 u_k) {

[0062] if ((e_k > HTCLTH_CTRL_ETH_M) && (e_k < HTCLTH_CTRL_ETH_P)) { / *When the deviation is within the integrable range, the cumulative deviation is included* /

[0063] v_htclth_ctrl[htr].e_s += e_k;

[0064] }

[0065] v_htclth_ctrl[htr].e_1 = e_k;

[0066] v_htclth_ctrl[htr].u_1 = u_k;

[0067] v_htclth_ctrl[htr].phs++;

[0068] if (v_htclth_ctrl[htr].phs >= HTCLTH_CTRL_PHS_NRM) {

[0069] v_htclth_ctrl[htr].phs = HTCLTH_CTRL_PHS_NRM;

[0070] }

[0071] }

[0072] The preset time can be user - defined, such as 20ms. For example, at 10ms, the temperature of the graphene heating cloth is collected through the thermostat, and at 20ms, the temperature of the graphene heating cloth is collected through the thermostat. Then, the temperatures collected at 10ms and 20ms need to be converted into resolutions suitable for temperature control respectively to obtain the corresponding first temperature and second temperature.

[0073] Step S20: Perform smoothing filtering on the first temperature and the second temperature to obtain the current target temperature.

[0074] In specific implementation, it is necessary to perform smoothing filtering on the first temperature and the second temperature to filter out the temperature fluctuations, and use the filtered temperature as the current target temperature. The resolution corresponding to the current target temperature is the same as that corresponding to the first temperature and the second temperature.

[0075] Step S30: Determine the current temperature deviation according to the current target temperature and the desired temperature, and calculate the rate proportional control parameter, the deviation integral control parameter, and the deviation differential control parameter according to the current temperature deviation.

[0076] It should be noted that the desired temperature is the temperature at which the door handle is to be achieved, which is set by the user through the graphene door handle heating system on the mobile terminal.

[0077] Further, the processing method for calculating the rate proportional control parameter according to the current temperature deviation is to perform look-up table linear interpolation on the current temperature deviation to obtain the first proportional parameter and the second proportional parameter; determine the target proportional parameter according to the first proportional parameter and the second proportional parameter; calculate the rate proportional control parameter according to the target proportional parameter, the current temperature deviation, and the integral period.

[0078] It should also be understood that look-up table linear interpolation is a data estimation method for finding unknown data points between known data points in a data table.

[0079] In specific implementation, calculate the current temperature deviation by determining the current target temperature and the desired temperature, perform look-up table linear interpolation on the current temperature deviation to obtain the known data points, i.e., the first proportional parameter and the second proportional parameter, and then determine the target proportional parameter Kp corresponding to the first proportional parameter and the second proportional parameter.

[0080] Rate proportional control parameter = (Target proportional parameter Kp * Current temperature deviation e_k * Integral period Ti) / Integral period Ti

[0081] It should also be noted that different heating speeds can be achieved through the control of the proportional parameter.

[0082] In specific implementation:

[0083] / * Definition of the table for calculating the proportional control parameter * /

[0084] #define HTCLTH_KP_BP(4)

[0085] static uint16 r_htclth_bp_kp_tc[HTCLTH_KP_BP] = {

[0086] T_D2C(1),

[0087] T_D2C(2),

[0088] T_D2C(5),

[0089] T_D2C(10),

[0090] };

[0091] static sint16 r_htclth_bp_kp_kp[HTCLTH_KP_BP] = {

[0092] HTCLTH_CTRL_RD * HTCLTH_PWM_THV / T_D2C(2),

[0093] HTCLTH_CTRL_RD * HTCLTH_PWM_THV / T_D2C(4),

[0094] HTCLTH_CTRL_RD * HTCLTH_PWM_THV / T_D2C(5),

[0095] HTCLTH_CTRL_RD * HTCLTH_PWM_THV / T_D2C(10),

[0096] };

[0097] / * Proportional control parameter calculation (linear interpolation by looking up table according to deviation) * /

[0098] static sint32 htclth_actr_calc_kp(sint16 e_k) {

[0099] sint32 k_p;

[0100] if (e_k < 0) {

[0101] e_k = 0 - e_k;

[0102] }

[0103] k_p = (sint32)utl_lkup_u16_s16((uint16)e_k, HTCLTH_KP_BP, r_htclth_bp_kp_tc, r_htclth_bp_kp_kp);

[0104] return (k_p);

[0105] }

[0106] / *u_k = Kp*(e_k + e_s / Ti + Td*d_k) + U0* /

[0107] / *u_k = Kp*e_k + Kp*e_s / Ti + Kp*Td*d_k + U0* /

[0108] / *u_k = (Kp*Ti*e_k + Kp*e_s + Kp*Td*Ti*d_k) / Ti + U0* /

[0109] Further, the processing method for calculating the integral control parameter of the deviation according to the current temperature deviation is to determine the integral of the deviation according to the current temperature deviation, and judge whether the integral of the deviation is within a preset integral range; if so, calculate the integral control parameter of the deviation according to the integral of the deviation, the target proportional parameter and the integral period.

[0110] It should be understood that the integral of the deviation is the accumulated value of the current temperature deviation, and the preset integral range is user-defined.

[0111] Integral control parameter of deviation = (target proportional parameter Kp * integral of deviation e_s) / integral period Ti

[0112] Further, the processing method for calculating the differential control parameter of the deviation according to the current temperature deviation is to determine the previous temperature deviation corresponding to the current temperature deviation; calculate the deviation difference between the current temperature deviation and the previous temperature deviation; calculate the differential control parameter of the deviation according to the deviation difference, the differential period, the integral period and the target proportional parameter.

[0113] The deviation difference can also be understood as the differential of the temperature deviation.

[0114] Differential control parameter of deviation = (target proportional parameter Kp * differential of temperature deviation d_k * integral period Ti * differential period Td) / integral period Ti

[0115] It should also be noted that the stable final target temperature (i.e., the desired temperature) is controlled through the cooperation of the integral control parameter of the deviation and the differential control parameter of the deviation.

[0116] Step S40: Determine a PWM voltage signal with a preset period based on the rate proportional control parameter, the integral control parameter of the deviation, and the differential control parameter of the deviation, and drive a heating actuator built in the graphene heating cloth through the PWM voltage signal with the preset period to heat the door handle.

[0117] Further, the processing method for determining the preset period PWM voltage signal based on the rate proportional control parameter, the integral of deviation control parameter, and the derivative of deviation control parameter is to determine the preset initial duty cycle of the PWM voltage signal; calculate the preset period PWM voltage signal according to the rate proportional control parameter, the integral of deviation control parameter, the derivative of deviation control parameter, and the preset initial duty cycle.

[0118] u_k = (Kp * Ti * e_k + Kp * e_s + Kp * Td * Ti * d_k) / Ti + U0

[0119] u_k is the preset period PWM voltage signal (i.e., the duty cycle of the PWM voltage signal), and U0 is the duty cycle of the default output (i.e., the preset initial duty cycle).

[0120] In this embodiment, a 10 ms period PWM voltage signal with an appropriate duty cycle can be obtained to drive the heating actuator built in the graphene heating cloth to heat the door handle.

[0121] It should also be noted that before driving the heating actuator built in the graphene heating cloth to heat the door handle, the preset period PWM voltage signal needs to be quantized to obtain a quantized PWM voltage signal, and the quantized preset period PWM voltage signal is subjected to amplitude limiting and smoothing processing, and the processed preset period PWM voltage signal is used to drive the heating actuator built in the graphene heating cloth to heat the door handle.

[0122] In specific implementation, the temperature control code for realizing door handle heating is:

[0123] / * Output duty cycle calculation, control period: 20 ms (50 Hz) * /

[0124] uint16 htclth_actr_duty_ctrl(uint8 htr) {

[0125] sint32 k_p;

[0126] sint32 u_k;

[0127] sint32 e_s;

[0128] sint16 e_k;

[0129] sint16 d_k = 0;

[0130] e_k = T_D2C(v_htclth_actr_tgt[htr]) - v_htclth_snsr_phy[htr];

[0131] / * Calculate the deviation between the target temperature and the actual temperature * /

[0132] k_p = htclth_actr_calc_kp(e_k);

[0133] / * Calculate the proportional control parameter based on the deviation * /

[0134] u_k = k_p * HTCLTH_CTRL_TI * e_k;

[0135] / * Calculate the proportional control output * /

[0136] if ((e_k > HTCLTH_CTRL_ETH_M) && (e_k < HTCLTH_CTRL_ETH_P)) { / * If the deviation is within the integrable range * /

[0137] e_s = v_htclth_ctrl[htr].e_s + e_k;

[0138] / * Calculate the deviation integral * /

[0139] u_k += k_p * e_s;

[0140] / * Include the integral control output in the control output * /

[0141] }

[0142] if (v_htclth_ctrl[htr].phs >= HTCLTH_CTRL_PHS_EK1) {

[0143] / * If there is at least one deviation * /

[0144] d_k = e_k - v_htclth_ctrl[htr].e_1;

[0145] / * Calculate the deviation difference * /

[0146] u_k += k_p * HTCLTH_CTRL_TD * HTCLTH_CTRL_TI * d_k;

[0147] / * Include the differential control output in the control output * /

[0148] }

[0149] u_k / = HTCLTH_CTRL_RD;

[0150] / * Fixed-point processing of the control output: divide by the denominator for rounding * /

[0151] u_k / = HTCLTH_CTRL_TI;

[0152] / *Fixed-point processing of the control output: divide by the integration period* /

[0153] u_k += HTCLTH_PWM_DFT;

[0154] / *Add the default control output to the control output* /

[0155] if(u_k <= HTCLTH_PWM_OFF){

[0156] / *Limit the control output* /

[0157] u_k = HTCLTH_PWM_OFF;

[0158] }else if(u_k >= HTCLTH_PWM_THV){

[0159] u_k = HTCLTH_PWM_THV;

[0160] }

[0161] / *Smooth the control output* /

[0162] u_k = (v_htclth_ctrl[htr].u_1 * HTCLTH_PWM_WT_HST + u_k * HTCLTH_PWM_WT_CRT) / HTCLTH_PWM_WT_RND;

[0163] / *Update the control algorithm parameters* /

[0164] htclth_actr_ctrl_update(htr, e_k, (uint16)u_k);

[0165] return((uint16)u_k);

[0166] }

[0167] In this embodiment, within a preset time, the thermostat is first controlled to collect the first temperature and the second temperature corresponding to the graphene heating cloth, and the first temperature and the second temperature are smoothed and filtered to obtain the current target temperature. Then, the current temperature deviation is determined based on the current target temperature and the desired temperature, and the rate proportional control parameter, the deviation integral control parameter, and the deviation differential control parameter are calculated according to the current temperature deviation. After that, a preset period PWM voltage signal is determined based on the rate proportional control parameter, the deviation integral control parameter, and the deviation differential control parameter. Finally, the heating actuator built in the graphene heating cloth is driven by the preset period PWM voltage signal to heat the door handle. The graphene material in this embodiment has excellent thermal conductivity and can make the door handle reach the ideal thawing temperature in a short time. The graphene heating cloth continues to work through the control of the mobile terminal, thus avoiding the inconvenience of the vehicle owner having to manually thaw the door handle, and further realizing the intelligent temperature control of the graphene heating cloth, improving the convenience and comfort of use.

[0168] Refer to Figure 4 , Figure 4 which is the structural block diagram of the first embodiment of the graphene-based door handle heating system of the present invention.

[0169] The graphene heating cloth is installed inside the door handle structure body, and the thermostat is connected to the graphene heating cloth through an electric beam, and the mobile terminal is communicatively connected to the thermostat;

[0170] As Figure 4 shown, the graphene-based door handle heating system proposed in the embodiment of the present invention includes:

[0171] An acquisition module 4001, configured to control the thermostat to collect the first temperature and the second temperature corresponding to the graphene heating cloth within a preset time;

[0172] A processing module 4002, configured to perform smoothing and filtering processing on the first temperature and the second temperature to obtain the current target temperature;

[0173] A calculation module 4003, configured to determine the current temperature deviation based on the current target temperature and the desired temperature, and calculate the rate proportional control parameter, the deviation integral control parameter, and the deviation differential control parameter according to the current temperature deviation;

[0174] A control module 4004, configured to determine a preset period PWM voltage signal based on the rate proportional control parameter, the deviation integral control parameter, and the deviation differential control parameter, and drive the heating actuator built in the graphene heating cloth to heat the door handle through the preset period PWM voltage signal.

[0175] Other embodiments or specific implementations of the graphene-based door handle heating system of the present invention may refer to the above-described method embodiments and will not be elaborated herein.

[0176] It should be noted that in this document, the terms "including", "comprising", or any other variation thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system including a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or system. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article, or system including that element.

[0177] The serial numbers of the above-described embodiments of the present invention are only for description and do not represent the superiority or inferiority of the embodiments.

[0178] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-described embodiment methods can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as a read-only memory / random access memory, magnetic disk, optical disk) and includes several instructions for causing a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in various embodiments of the present invention.

[0179] The above are only the preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or equivalent process transformation made by using the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A door handle heating method based on graphene, characterized in that: The graphene heating cloth is installed inside the door handle structure, the thermostat is connected to the graphene heating cloth through an electric beam, and the mobile terminal is connected to the thermostat for communication. The graphene-based door handle heating method includes the following steps: Within a preset time, controlling the temperature controller to collect the first temperature and the second temperature corresponding to the graphene heating cloth; Performing smoothing filtering on the first temperature and the second temperature to obtain a current target temperature; Determine a current temperature deviation according to the current target temperature and the expected temperature, and calculate a rate proportional control parameter, a deviation integral control parameter, and a deviation differential control parameter according to the current temperature deviation; A preset period PWM voltage signal is determined based on the rate proportional control parameter, the deviation integral control parameter and the deviation differential control parameter, and the preset period PWM voltage signal is used to drive the heating actuator built into the graphene heating cloth to heat the door handle.

2. The method according to claim 1, characterized in that The step of calculating the rate proportional control parameter according to the current temperature deviation comprises: Performing table lookup and linear interpolation on the current temperature deviation to obtain a first proportional parameter and a second proportional parameter; Determine a target scale parameter according to the first scale parameter and the second scale parameter; A rate proportional control parameter is calculated according to the target proportional parameter, the current temperature deviation and an integral period.

3. The method according to claim 2, characterized in that The step of calculating the deviation integral control parameter according to the current temperature deviation comprises: Determine a deviation integral according to the current temperature deviation, and determine whether the deviation integral is within a preset integral range; If so, a deviation integral control parameter is calculated according to the deviation integral, the target proportional parameter and the integral period.

4. The method according to claim 3, characterized in that The step of calculating the deviation differential control parameter according to the current temperature deviation comprises: Determine a previous temperature deviation corresponding to the current temperature deviation; Calculating a deviation difference between the current temperature deviation and the last temperature deviation; A deviation differential control parameter is calculated according to the deviation difference, the differential period, the integral period and the target proportional parameter.

5. The method according to claims 1 to 4, characterized in that The step of determining a preset period PWM voltage signal based on the rate proportional control parameter, the deviation integral control parameter and the deviation differential control parameter comprises: determining a preset initial duty cycle of the PWM voltage signal; A preset period PWM voltage signal is calculated according to the rate proportional control parameter, the deviation integral control parameter, the deviation differential control parameter and the preset initial duty cycle.

6. The method according to claim 5, characterized in that The step of driving the heating actuator built into the graphene heating cloth to heat the door handle by the preset period PWM voltage signal comprises: Performing fixed-point processing on the preset period PWM voltage signal to obtain a fixed-point PWM voltage signal; The fixed-point preset period PWM voltage signal is limited and smoothed, and the processed preset period PWM voltage signal is used to drive the heating actuator built into the graphene heating cloth to heat the door handle.

7. A door handle heating system based on graphene, characterized in that: The graphene heating cloth is installed inside the door handle structure, the thermostat is connected to the graphene heating cloth through an electric beam, and the mobile terminal is connected to the thermostat for communication. The graphene-based door handle heating system includes: An acquisition module, used for controlling the temperature controller to acquire the first temperature and the second temperature corresponding to the graphene heating cloth within a preset time; A processing module, used for performing smoothing filtering on the first temperature and the second temperature to obtain a current target temperature; a calculation module, configured to determine a current temperature deviation according to the current target temperature and the expected temperature, and calculate a rate proportional control parameter, a deviation integral control parameter, and a deviation differential control parameter according to the current temperature deviation; A control module is used to determine a preset period PWM voltage signal based on the rate proportional control parameter, the deviation integral control parameter and the deviation differential control parameter, and drive the heating actuator built into the graphene heating cloth to heat the door handle through the preset period PWM voltage signal.

8. A door handle heating device based on graphene, characterized in that: The device comprises: a memory, a processor, and a graphene-based door handle heating program stored in the memory and executable on the processor, wherein the graphene-based door handle heating program is configured to implement the steps of the graphene-based door handle heating method as described in any one of claims 1 to 6.

9. A storage medium, characterized in that: The storage medium stores a graphene-based door handle heating program, and when the graphene-based door handle heating program is executed by the processor, the steps of the graphene-based door handle heating method as described in any one of claims 1 to 6 are implemented.

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