CN215935117U

CN215935117U - Electric blanket temperature control board

Info

Publication number: CN215935117U
Application number: CN202122093618.5U
Authority: CN
Inventors: 周薇
Original assignee: Wuxi Institute of Technology
Current assignee: Wuxi Institute of Technology
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2022-03-01
Anticipated expiration: 2031-08-31

Abstract

The utility model discloses an electric blanket temperature control plate which comprises a processing module, a serial port communication module, a power supply module, a trigger module, a display module and a temperature detection module, wherein the processing module is used for processing the temperature of an electric blanket; the serial port communication module, the trigger module, the display module and the temperature detection module are all connected with the processing module; one end of the trigger module is connected with the processing module, and the other end of the trigger module is connected with the power supply module; the power supply module comprises a zero-crossing detection module and a stabilized voltage supply; the trigger module comprises a bidirectional thyristor and a photoelectric coupler. The temperature control board of the electric blanket provided by the utility model can realize zone control of the electric blanket and can also safely and efficiently adjust the temperature of each area respectively, thereby meeting the requirements of different people and different parts on temperature differentiation.

Description

Electric blanket temperature control board

Technical Field

The utility model belongs to the technical field of electric blankets, and particularly relates to a temperature control plate of an electric blanket.

Background

An electric blanket, also called an electric mattress, is a contact type electric warming device, which weaves a specially made soft cable type electric heating element with the insulation performance reaching the standard into a blanket in a shape of a snake disk, and generates heat when electrified; the quilt is mainly used for increasing the temperature in the quilt when people sleep to achieve the purpose of warming, and can also be used for removing dampness of the quilt.

At present, in the related art, the temperature control board of the electric blanket realizes the functions of stepless temperature adjustment and automatic temperature control by using a microcontroller and power electronic devices, can be adjusted to a proper temperature according to users of different ages and different constitutions, and even can be controlled in a partition manner on one electric blanket to realize the respective opening or closing of each area.

However, although the temperature control plate in the related art is more and more simplified in structure and more powerful in function, the following defects still exist, namely, the temperature of each area cannot be safely and efficiently adjusted while the electric blanket is subjected to zone control, and the requirements of different people and different parts on temperature differentiation cannot be further met.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: in order to overcome the defects in the prior art, the utility model provides a temperature control plate of an electric blanket, which aims to solve the technical problem of how to safely and efficiently adjust the temperature of each area while carrying out zone control on the electric blanket so as to meet the requirements of different people and different parts on temperature differentiation.

The technical scheme is as follows: in order to achieve the purpose, the utility model adopts the technical scheme that:

an electric blanket temperature control plate comprises a processing module, a serial port communication module, a power supply module, a trigger module, a display module and a temperature detection module;

the serial port communication module, the trigger module, the display module and the temperature detection module are all connected with the processing module;

one end of the trigger module is connected with the processing module, and the other end of the trigger module is connected with the power supply module;

the power supply module comprises a zero-crossing detection module and a stabilized voltage supply;

the trigger module comprises a bidirectional thyristor and a photoelectric coupler.

Optionally, the electric blanket temperature control board further comprises an infrared receiving module, and the infrared receiving module is connected with the processing module.

Optionally, the model of the infrared receiving module is VS 1838B.

Optionally, the electric blanket temperature control plate further comprises a buzzer, and the buzzer is connected with the processing module.

Optionally, the processing module is implemented as an STC12C5a60S2 single chip microcomputer main control chip.

Optionally, the serial port communication module is RS-232 in model.

Optionally, the regulated power supply comprises an LM7805 regulator chip and a plurality of filter capacitors connected to each other.

Optionally, the triac is model BTA06 and the opto-coupler is implemented as an optically isolated triac driver MOC 3021.

Optionally, the temperature detection module is implemented as a temperature sensor of the LM35 series.

Optionally, the display module is implemented as an LCD1602A type LCD screen, and the LCD1602A type LCD screen is implemented as an HD44780 chip type.

Has the advantages that: compared with the prior art, the temperature control board for the electric blanket provided by the utility model can realize zone control of the electric blanket, and can also safely and efficiently adjust the temperature of each area respectively, so that the requirements of different people and different parts on temperature differentiation are met.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:

fig. 1 is a schematic diagram of a hardware connection of an electric blanket temperature control board according to an exemplary embodiment of the present invention;

fig. 2 is a schematic diagram illustrating a negative feedback control principle of a processing module of an electric blanket temperature control board according to an exemplary embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "central", "longitudinal", "lateral", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The utility model is further described with reference to the following figures and examples.

As shown in fig. 1, the electric blanket temperature control board comprises a processing module, a serial communication module, a power module, a trigger module, a display module and a temperature detection module; the serial port communication module, the trigger module, the display module and the temperature detection module are all connected with the processing module; one end of the trigger module is connected with the processing module, and the other end of the trigger module is connected with the power supply module; the power supply module comprises a zero-crossing detection module and a stabilized voltage supply; the trigger module comprises a bidirectional thyristor and a photoelectric coupler.

The electric blanket temperature control board also comprises an infrared receiving module, and the infrared receiving module is connected with the processing module. The model of the infrared receiving module is VS 1838B. The VS1838B infrared receiving module is packaged in a direct-insert mode by adopting inner and outer double shielding, outputs matched TTL and CMOS level, and has high sensitivity and good anti-interference performance, and the receiving distance can reach 20 meters.

The electric blanket temperature control plate also comprises a buzzer, and the buzzer is connected with the processing module. The functions of sounding and alarming of the remote control key are realized by programming.

The processing module is realized as an STC12C5A60S2 singlechip main control chip. The STC12C5A60S2 singlechip main control chip is a new generation 8051 singlechip with high speed, low power consumption and ultra-strong anti-interference, and the instruction code is completely compatible with the traditional 8051, but the speed is 8-12 times faster. The built-in A/D conversion function provides ISP (programmable in system) function, and the user program can be directly downloaded through a serial port.

The serial port communication module is RS-232 in model. On one hand, the RS-232 serial port communication module burns and writes an MCS-51 assembly language program compiled on a PC into a main control chip of an STC12C5A60S2 singlechip after RS-232 level conversion through a serial port, thereby realizing embedded program development; and on the other hand, a serial port communication program is compiled, and information in a register of a main control chip of the STC12C5A60S2 singlechip is uploaded to a PC (personal computer) for program analysis, processing and debugging.

The voltage-stabilizing power supply comprises an LM7805 voltage-stabilizing chip and a plurality of filter capacitors which are connected with each other, and then 5V working voltage required by system work is obtained.

The model of the bidirectional thyristor is BTA06, the photoelectric coupler is an optical isolation bidirectional thyristor driver MOC3021, and the photoelectric coupler can control the LED inside the photoelectric coupler to emit light at any time by the STC12C5A60S2 singlechip main control chip, so that the bidirectional thyristor BTA06 is switched on.

The temperature detection module is realized by a temperature sensor of LM35 series, and the temperature sensor of LM35 series has higher working precision and wider linear working range. The output voltage is linearly proportional to the temperature, the output voltage is increased by 10mv at 1 ℃ per liter, and the device does not need external calibration or fine adjustment and is easy to use.

The display module is realized as an LCD1602A type liquid crystal screen, the built-in chip type of the LCD1602A type liquid crystal screen is realized as HD44780, and a control program compiled based on the HD44780 can be conveniently applied to most character type liquid crystals on the market, so that a good foundation is laid for upgrading and commercialization of a system in the future.

In the embodiment of the application, the zero-crossing detection module is a key part of the bidirectional thyristor shift voltage regulation and is used for detecting the moment when the alternating-current power supply voltage passes through the zero voltage, and the zero-crossing point is used as the reference of the trigger delay of the bidirectional thyristor.

Optionally, the electric blanket temperature control plate is also connected with a relay module, which is used for solving the problem that the strong current loop always has conducted alternating current and cannot be turned off, and greatly improving the safety performance of the product.

The utility model also provides a working principle of the electric blanket temperature control plate:

on one hand, during work, a zero-crossing detection module captures a zero crossing point of sinusoidal alternating current, the load power control is realized by utilizing the matching of the zero point, and simultaneously, a commercial power synchronous pulse is generated to be used as the reference of the bidirectional thyristor phase-shifting conduction angle, so that the average output power of a multi-path heating source is controlled.

On the other hand, the system adopts an incremental PID control algorithm, the temperature sampled by the ADC is used as a feedback parameter, and the power output quantity is adjusted in real time so as to keep the temperature constant near a target value set by a user. The calculation formula of the incremental PID control algorithm is as follows:

in the equation KP × KP1, it is described that when adjusting PID parameters, tuning can be coordinated by using a common coefficient K, where K is a power of 2. For a PID controller, the most important parameters are the proportional coefficient KP, the integral coefficient KI, the differential coefficient KD, and the sampling period T. When adjusting each parameter on site, the values of KP, KI and KD are adjusted repeatedly according to the influence trend of different parameters of PID on performance, usually according to the setting steps of firstly proportional, then integral and then differential.

By combining the descriptions of the control system and the control strategy and combining the specific situation of using hardware in the design, a structure diagram of negative feedback control of the main control chip of the STC12C5A60S2 singlechip can be obtained, as shown in FIG. 2, the bidirectional controllable silicon takes the task of DA conversion, and the conversion of the conduction angle of the bidirectional controllable silicon needs to be replaced by digital quantity; during programming, the numerical values of A/D sampling are binary numbers of 1 byte in the design, the output quantity of the PID controller is stored by a RAM unit of 3 bytes, and therefore specific processing is needed to be carried out corresponding to the change of the conduction angle in the program; because the heating device has an accumulation function, the output state of the last control period can be naturally maintained, which brings great convenience to the programming of the incremental PID program; in addition, the temperature set value is input through an external infrared remote controller, the infrared remote controller is used as a key input mode, and a serial port communication module, a buzzer and other modules are matched to enhance the man-machine interaction function.

In conclusion, the single chip microcomputer is used as a main control chip, multi-temperature-zone control of the electric blanket is realized based on an incremental PID control strategy, wherein an MCS-51 assembly language is adopted for writing embedded programs of the single chip microcomputer, a 51 single chip microcomputer multitask mechanism based on a non-preemptive kernel is introduced, sub programs of all modules are multitasked, and the operation efficiency of the control chip is improved; the temperature of the multi-channel heating module is automatically controlled by writing an incremental PID algorithm program and adjusting corresponding parameters. The temperature control board of the electric blanket provided by the utility model can realize zone control of the electric blanket and can also safely and efficiently adjust the temperature of each area respectively, thereby meeting the requirements of different people and different parts on temperature differentiation.

The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the utility model and these are intended to be within the scope of the utility model.

Claims

1. The electric blanket temperature control board is characterized by comprising a processing module, a serial port communication module, a power supply module, a trigger module, a display module and a temperature detection module;

2. The electric blanket temperature control board of claim 1, further comprising an infrared receiving module, wherein the infrared receiving module is connected with the processing module.

3. The electric blanket temperature control panel of claim 2, wherein the infrared receiving module is model number VS 1838B.

4. The electric blanket temperature control board of claim 1, further comprising a buzzer, wherein the buzzer is connected with the processing module.

5. The electric blanket temperature control board of claim 1, wherein the processing module is implemented as an STC12C5a60S2 single chip microcomputer main control chip.

6. The electric blanket temperature control plate of claim 1, wherein the serial port communication module is RS-232 in type.

7. The electric blanket temperature control plate of claim 1, wherein the voltage-stabilized power supply comprises an LM7805 voltage-stabilizing chip and a plurality of filter capacitors connected with each other.

8. The electric blanket temperature control board of claim 1, wherein the triac is of type BTA06 and the opto-coupler is implemented as an opto-isolated triac driver MOC 3021.

9. The electric blanket temperature control panel of claim 1, wherein the temperature detection module is implemented as a temperature sensor of the LM35 series.

10. The electric blanket temperature control plate of claim 1, wherein the display module is implemented as an LCD1602A type LCD screen, and the LCD1602A type LCD screen has a built-in chip model implemented as HD 44780.