CN210203864U - Intelligent temperature-adjusting multifunctional electric heating table board - Google Patents

Abstract

The utility model discloses a multi-functional warm table of electricity that intelligence adjusted temperature, including table, control circuit, the table has the table leg, the right side is equipped with recess I on the table, be equipped with warm cushion of electricity in the recess I, warm cushion of electricity includes cushion I, heat conduction cushion II, carbon fiber heating wire, cushion I is placed in recess I, I inside carbon fiber heating wire that is equipped with of cushion, be equipped with temperature sensor on the carbon fiber heating wire, heat conduction cushion II is laid on the table, the table right side is equipped with the insulating waterproof box of plastics I, be equipped with control circuit and chargeable lithium cell in the insulating waterproof box of plastics I, it has display module and button module to inlay on the insulating waterproof box of plastics I, I next door of the insulating waterproof box of plastics is equipped with the plug, control circuit includes main control chip, a single-chip microcomputer, the warm cushion control module of electricity, bee calling organ control module. The utility model discloses have winter's cold-proof measure and summer's fan function, can satisfy requirements such as study and official working comfort level and operation convenience.

Description

Intelligent temperature-adjusting multifunctional electric heating table board

Technical Field

The utility model relates to an intelligent temperature-adjusting multifunctional electric heating table.

Background

When cold winter comes, for many students who like to use the small table plate to read books or study on the bed and people who like to use the small table plate to work, hands and feet of people become cold and stiff in winter, and the progress of reading and studying and the working efficiency are influenced greatly. In order to solve the problem, people generally choose to wear gloves, use an electric oven or turn on an air conditioner indoors. But in the above several cases: the wearing of the glove can greatly influence the flexibility of the finger holding the pen for writing; if the heating equipment such as an electric oven is placed and used beside a table, the most worried about the safety problem is that clothes and books can be burnt out by carelessly separating the heating equipment too close, the electric heating equipment on the table can be affected, the electric heating equipment is damaged, and if the electric heating equipment is used on a bed, great potential safety hazards can be caused. When people use heating equipment such as an electric oven and the like for heating for a long time, the generated heat temperature can lead people to feel dry heat on the skin, and the use of electric heater equipment can cause great energy waste, and the electric heater equipment is improper to use and is easy to cause fire or scald the skin; if the air conditioner is used for heating, the energy consumption is too large. When summer comes, people need to consider solving the problem of hot summer heat, and most people often choose to use an electric fan or turn on an air conditioner in order to increase the comfort of reading books and working. However, the fan occupies a large space on the bed and is accompanied by noise, and the air conditioner consumes too much energy, so that the invention of the equipment is necessary to solve the problems, thereby ensuring the comfort in the process of study or office work. At present, the problem that the traditional small table cannot perfectly solve is that the comfort level of people is improved mostly by designing the shape of the table, and the problem is not thoroughly solved.

The electric heating table is a contact electric heating device, and is characterized by that a specially-made flexible cable type electric heating element whose insulating property can be up to standard is made into the form of coiled snake, and woven into the soft pad made of synthetic resin material or sewed into the soft pad, and when it is powered on, it can give out heat. The heating table is mainly used for increasing the temperature of the table top when people feel cold and are frozen to achieve the purpose of heating. It has low power consumption, adjustable temperature, convenient use and wide application. With the development of science and technology, the development of the electric heating table board is greatly improved, the use range is more and more extensive, but the electric heating table board is always a great hidden danger of causing fire, and probably due to nonstandard behaviors during use or fake and fake products sold by unqualified merchants. The electric heating table board is used as a life appliance used in a short distance, and once a safety accident occurs, the life and property of the consumers are greatly threatened.

Disclosure of Invention

In order to solve the technical problem, the utility model provides a simple structure, the intelligent electric heating table that adjusts the temperature that the security is good.

The utility model provides a technical scheme of above-mentioned problem is: a multifunctional electric heating table board capable of intelligently adjusting temperature comprises a table board, a plug, a plastic insulating waterproof box, table legs, a plastic insulating waterproof box I, an electric heating cushion and a control circuit, wherein the four corners of the lower surface of the table board are provided with foldable table legs, the right side of the upper surface of the table board is provided with a groove I, the electric heating cushion is arranged in the groove I and comprises a cushion I, a heat-conducting cushion II and a carbon fiber heating wire, the cushion I is placed in the groove I, the inside of the cushion I is provided with a plurality of carbon fiber heating wires coated with a layer of heat-resistant resin, the carbon fiber heating wire is provided with a temperature sensor, the heat-conducting cushion II is laid on the upper surface of the table board, the lower surface of the heat-conducting cushion II is contacted with the cushion I, the right side of the table board is provided with the plastic insulating waterproof box I, the control circuit and a lithium battery are arranged in the plastic, display module and button module have been inlayed on the insulating waterproof box of plastics I, and I next door of the insulating waterproof box of plastics is equipped with two hole plugs embedded in the table inside, and bee calling organ control module sets up on the table, control circuit includes main control chip singlechip, is used for the motor drive module of driving the fan, is used for controlling the warm cushion control module of electric heating of carbon fiber heater temperature, is used for the bee calling organ control module of warning, and display module, button module, temperature sensor, carbon fiber heater, motor drive module, warm cushion control module of electric heating, bee calling organ control module all link to each other with the singlechip.

Above-mentioned multi-functional warm table of electricity that intelligence adjusted temperature, I embedded plastics of recess have waterproof box II of insulating, cushion I is placed in waterproof box II of insulating of plastics, and I upper surface of cushion and table upper surface parallel and level.

Above-mentioned multi-functional warm table of electric that intelligence adjusted temperature, open the table front end has the spout track, in the spout track vertically runs through the table and stretches into recess I, the slidable is equipped with warm cushion position adjuster of electricity on the spout track, warm cushion position adjuster of electricity stretch into in recess I and with I fixed connection of cushion, adjust the position of cushion I in plastic insulation waterproof box II through adjusting the position of warm cushion position adjuster of electricity on the spout track.

Above-mentioned multi-functional electric warm table that intelligence adjusted temperature, table upper surface rear end is equipped with recess II, is equipped with the light in the recess II, and the light passes through hose fixed mounting on the right side cell wall of recess II, and the fluorescent tube of light is fire-retardant insulating plastic material, is equipped with the touch switch I of adjusting light luminance on the fluorescent tube, and the light is connected with the singlechip.

Above-mentioned multi-functional electric warm table that intelligence adjusted temperature, table upper surface left side is equipped with recess III, is equipped with the fan in the recess III, and the fan passes through bellows fixed mounting on the cell wall of recess III, is equipped with touch switch II of regulation wind-force size on the fan, and the fan is connected with the singlechip.

Above-mentioned multi-functional electric warm table that intelligence adjusted temperature, table front end shape is the rectangle, and four angles of table are the fillet, and the table front end is inside sunken arc form, and crooked radian is 160 degrees.

Above-mentioned multi-functional electric heating table that intelligence adjusted temperature, table front end bilateral symmetry is equipped with the formula of pushing up baffle, and the formula of pushing up baffle outside is parallel with the table edge.

Above-mentioned multi-functional warm table of electric that intelligence adjusted temperature, the table front end is equipped with human infrared sensor module, and human infrared sensor module links to each other with the singlechip.

Above-mentioned multi-functional electric heating table that intelligence adjusted temperature, table leg bottom parcel has cotton pad.

Above-mentioned multi-functional electric warm table that intelligence adjusted temperature, cushion I adopts synthetic resin material to make, cushion II adopts heat conduction waterproof material to make.

The beneficial effects of the utility model reside in that: the table legs of the utility model are foldable, the four corners of the table legs can be opened, and the table legs can be stably placed on a bed, a sofa, a floor and the like for more effective study and office; the electric heating table plate comprises an intelligent control system, can carry out AD acquisition on the temperature of the electric heating table plate through a temperature sensor, converts the temperature into a digital signal and transmits the digital signal to a control circuit, the control circuit adopts a single chip microcomputer, and then the single chip microcomputer displays the acquired signal through an OLED display screen. Meanwhile, the single chip microcomputer can continuously perform key scanning, key temperature setting, key timing setting and temperature control, and the heating, heat preservation and work stop states of the intelligent control cushion I are realized by comparing the set temperature and the collected temperature. The user can set for the temperature gear and the timing constant temperature duration that oneself wanted through adjusting the button module on warm table right side of electricity. When a user sets a temperature gear, the system monitors and collects the temperature of the electric heating table plate in real time and compares the temperature with a set temperature value, and if the temperature is lower than the set initial value, the carbon fiber heating wire is heated until the temperature reaches the set value; if the temperature reaches or exceeds the set value, the heating is immediately stopped. When the constant temperature duration is set by a user, the system is switched from a heating mode to a constant temperature mode, and the buzzer control module can send out three reminding sounds to indicate that the heating process of the electric heating table plate is finished; therefore, the time length required for heat preservation can be determined according to the requirements of users, and the electric energy can be saved. The temperature gears of different electric heating table boards can be set according to different personal preferences, so that the humanized setting of the product is increased. When the system detects that the temperature of the electric heating table exceeds the set alarm temperature, power-off protection is automatically adopted to prevent safety accidents. The touch switch II of fan and the touch switch I of light are all towards the table inboard, avoid the submergence of water, improve equipment's security performance, and the user can control the on or off and the wind-force regulation of fan through touch switch II, can control the on or off and the luminance regulation of light through touch switch I. A user can know the ideal achieved temperature gear, the constant temperature timing time length, the alarm temperature, the brightness level of an illuminating lamp and the wind power level of a fan through the OLED display screen, and the man-machine interaction function is fully realized. The power supply is very convenient, a user can connect the two-hole plug to supply power for an external power supply, and a rechargeable lithium battery built in the plastic insulating waterproof box I can also be used for supplying power. The device has no potential safety hazard of electric leakage, the whole circuits are connected to form a loop, and the circuit lead is wrapped by the insulating material, so that the design can effectively avoid the corrosion effect of a humid environment on the lead and the potential safety hazard of electric leakage. The fan sets up in the left recess III of warm table of electricity, the light is located the recess II of table rear end, can take out when using, not the time spent pack up, can save the utilization ratio and the parking space of table greatly, the front end ann of table has human infrared sensor module, can respond to whether someone in table dead ahead 3 meters, leave for a long time and forget when closing the power because of having the trouble when the user, the table can self-closing power, in case take place the incident. In summary, the utility model can adjust the temperature gear, the constant temperature and the brightness of the lighting lamp and the parameters of the fan wind power by the right key module when in use, and the human body infrared sensor module is arranged to ensure the safety when in use; the device also makes up the inconvenience brought by the fact that the existing small table board product does not consider the warm-keeping measures of people in winter and the fan function in summer and the study in a room with poor illumination, and can not meet the increasingly improved requirements of people on the study and office comfort, the operation convenience and the like.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a top view of the present invention.

Fig. 3 is a right side view of the present invention.

Fig. 4 is a front view of the present invention.

Fig. 5 is a front view of the electric warming cushion of the utility model.

Fig. 6 is a front view of the electric warming cushion of the utility model.

Fig. 7 is a block diagram of the circuit structure of the present invention.

Fig. 8 is a schematic circuit diagram of the main chip STC15 single chip of the control circuit of the present invention.

Fig. 9 is a schematic circuit diagram of a motor driving module of the fan.

Fig. 10 is a schematic circuit diagram of the temperature sensor.

Fig. 11 is a schematic circuit diagram of the electric warming cushion control module.

Fig. 12 is a schematic circuit diagram of a lighting lamp control module.

Fig. 13 is a schematic circuit diagram of the human body infrared sensor module.

Fig. 14 is a circuit schematic of the DC-DC voltage regulator module.

Fig. 15 is a schematic circuit diagram of the display module.

FIG. 16 is a schematic circuit diagram of a buzzer control module

Fig. 17 is a schematic circuit diagram of the key module.

FIG. 18 is a schematic diagram of a USB to TTL download module.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples.

As shown in fig. 1-6, the multifunctional electric heating table board with intelligent temperature adjustment comprises a wooden table board 1, a plug 4, a plastic insulating waterproof box II, table legs, a plastic insulating waterproof box I, an electric heating cushion and a control circuit.

Four corners of the lower surface of the table board 1 are provided with foldable table legs 11 made of alloy materials, so that a user can stably place the table legs on a bed, a sofa and the ground; when not in use, the desk plate can be folded below the desk plate 1, thereby greatly saving space and being convenient for storage; the lower end of the table leg 11 is wrapped by a silica gel cotton pad 12, so that the anti-slip table can effectively prevent from being skidded and can also prevent a bed sheet, a floor or a sofa from being scratched.

The table board comprises a table board 1 and is characterized in that a groove I is formed in the right side of the upper surface of the table board 1, an electric heating cushion is arranged in the groove I, the electric heating cushion comprises a cushion I14 made of a synthetic resin material, a heat conduction cushion II 18 made of a heat conduction waterproof material and a carbon fiber heating wire 15, a plastic insulation waterproof box II 13 is embedded in the groove I, the cushion I14 is placed in the plastic insulation waterproof box II 13, the upper surface of the cushion I14 is flush with the upper surface of the table board 1, a plurality of carbon fiber heating wires 15 coated with a layer of heat-resistant resin are arranged inside the cushion I14, each carbon fiber heating wire 15 comprises a temperature sensor 16 and is spirally wound by a core wire, a layer of heat-resistant resin is coated outside each heating wire 15, the defects that the strength of a metal wire electric heater is low and the oxidation is; heat conduction cushion II 18 is laid and is contacted at 1 upper surface of table and II 18 lower surfaces of heat conduction cushion and cushion I14, 16 real-time supervision carbon fiber heating wire 15's temperature through the temperature sensor that control circuit connects, select the temperature that generates heat of ideal through intelligent regulation, and I14 parcel carbon fiber heating wire 15 of cushion through synthetic resin material, then with heat transfer to on the heat conduction cushion II 18, through heat conduction cushion II 18 and the waterproof box II 13 of plastics insulation the seepage of water when having effectively prevented the use, the potential safety hazard that 15 direct contact table 1 wooden layer of carbon fiber heating wire lead to has also been avoided.

1 right side of table is equipped with plastic insulation waterproof box I5, is equipped with control circuit and rechargeable lithium cell in the plastic insulation waterproof box I5, and rechargeable lithium cell provides working power for whole electric heating table, and control circuit and rechargeable lithium cell are all by insulating plastic shell seal package, can make when the circular telegram if there is careless water dripping on it can not cause the potential safety hazard yet.

It has display module 6 and button module 7 to inlay on the insulating waterproof box of plastics I5, and display module 6 adopts the OLED display screen, and the user can directly select fixed recommendation duration (1 hour) or self-set time when selecting constant temperature duration through OLED display screen or button module 7, and when the specified duration of constant temperature reached the back, the system can be turned to the dormant mode by the constant temperature mode, and buzzer control module sends out three sound warning tones and points out that constant temperature mode is accomplished. Therefore, the intelligent timing function can be realized, electric energy can be saved, and safety accidents can be avoided.

The two-hole plug 4 embedded in the table board 1 is arranged beside the plastic insulating waterproof box I5, and the two-hole plug 4 can be stored in a retractable manner when not in use, so that the occupied space can be reduced, and the desk is convenient to converge and carry; when the product is used, a user can connect the two-hole plug 4 to supply power for an external power supply, and can also supply power for a rechargeable lithium battery placed in the plastic insulating waterproof box I5; when the external power supply is connected, the built-in rechargeable lithium battery can be charged, and when a user needs to use the rechargeable lithium battery and does not have a power interface, the built-in rechargeable lithium battery can be used for supplying power as required, so that the practicability of the product is greatly improved. The used charging management chip has three charging modes of trickle, constant current and constant voltage, the charging current can reach 2A, and the charging management chip has protection measures such as under-voltage locking, overvoltage protection, over-temperature protection and the like. The charging process is convenient, fast and safe.

Buzzer control module sets up on table 1, control circuit includes main control chip singlechip, is used for driving the motor drive module of fan, is used for controlling the warm cushion control module of electric heating of 15 temperatures of carbon fiber heater, is used for the buzzer control module of reporting to the police, and display module 6, button module 7, temperature sensor 16, carbon fiber heater 15, motor drive module, warm cushion control module of electric heating, buzzer control module all link to each other with the singlechip.

Consider the different use habits of many users, open 1 front end of table has aluminum alloy spout track 9, and spout track 9 vertically runs through table 1 and stretches into in recess I, the last slidable of spout track 9 is equipped with electrically warmed cushion position adjuster 10, electrically warmed cushion position adjuster 10 stretch into in recess I and with I14 fixed connection of cushion, adjust the position of cushion I14 in II 13 of plastic insulation waterproof box through adjusting the position of electrically warmed cushion position adjuster 10 on spout track 9, adjust the region that generates heat of user's own ideal, greatly increased the effective area that generates heat like this.

The rear end of the upper surface of the table plate 1 is provided with a groove II, an illuminating lamp 2 is arranged in the groove II, the illuminating lamp 2 is fixedly arranged on the right groove wall of the groove II through a hose, a user can bend freely and even rotate 180 degrees to adjust the illuminating angle of the illuminating lamp 2 to avoid the problem of poor light illumination, and the illuminating lamp can be contracted for storage when not in use, so that the occupied space can be reduced, and the convergence and the portability are convenient; the lamp tube of the illuminating lamp 2 is made of flame-retardant insulating plastic, the touch switch I for adjusting the brightness of the illuminating lamp 2 is arranged on the lamp tube, three-gear light adjustment can be performed, and a user can adjust and select different gears when using the lamp, so that satisfactory illumination conditions are achieved; the illuminating lamp 2 is connected with the single chip microcomputer.

The left side of the upper surface of the table plate 1 is provided with a groove III, a fan 3 is arranged in the groove III, the fan 3 is fixedly arranged on the groove wall of the groove III through a corrugated pipe, fan blades of the fan 3 are made of pvc materials, the flexible corrugated pipe can enable a user to randomly adjust the blowing direction, the air quantity is large, the noise is small, and the fan can be contracted and stored when not in use, so that the occupied space can be reduced, and the convergence and the portability are convenient; be equipped with touch switch II of adjusting the wind-force size on the fan 3, the user can adjust the gear of selecting different when using, improves user's comfort level, and fan 3 is connected with the singlechip.

The shape of the front end of the table board 1 is rectangular, four corners of the table board 1 are round corners, the front end of the table board 1 is in an inwards-concave arc shape, the bending radian is 160 degrees, the arc waist support design is possessed, and the utilization rate of the table top of the table board 1 is increased.

Push-up type baffles 17 are symmetrically arranged on two sides of the front end of the table plate 1, and the outer sides of the push-up type baffles 17 are parallel to the edge of the table plate 1. In order to prevent the objects on the table top from sliding off, the wooden push-up baffle 17 can be pulled up, which greatly increases the convenience and diversity of the product in use.

The human body infrared sensor module 8 is arranged at the front end of the table board 1, and the human body infrared sensor module 8 is connected with the single chip microcomputer. Whether people are in3 meters in the dead ahead of table 1 can be responded to human infrared sensor module 8, leaves and forgets when closing the power again because of having the trouble for a long time when the user, and human infrared sensor module 8 can the self-closing table 1's power in case the incident takes place, has improved the security greatly, has also prolonged the life of warm cushion of electricity.

The circuit structure diagram of the present invention is shown in fig. 7. When the equipment is in a charging state, electric energy is input into the charging module through the electric energy input port to charge the lithium battery, and when the equipment is in a using state, the electric energy is input into the DC-DC voltage stabilizing circuit through the lithium battery to obtain stable voltage and then is supplied to each module for use. The main control chip of the device adopts an STC15F2K60S2 single chip microcomputer, changes parameters needing to be set by receiving data input by the temperature sensor 16, the human body infrared sensor module 8 and the key module 7, and controls the heating and timing power-off of the carbon fiber heating wire 15, the motor driving control module of the illuminating lamp 2 and the fan 3, the OLED liquid crystal display 6, the buzzer control module, the human body infrared sensor module 8 and the temperature sensor to work.

The utility model discloses do not have the potential safety hazard of electric leakage, whole circuit links into the return circuit and circuit wire 19 is outer to be wrapped up insulating material, and this design can effectively avoid appearing humid environment to the erosion action of wire 19 and the potential safety hazard of electric leakage.

The utility model discloses a working process does: firstly, initializing a system (interrupting a timer and initializing a module), then standby judging whether a key module 7 is pressed to change internal parameters, if so, updating the display of the key module, and if the changed parameters are parameters of a motor driving module for controlling the fan 3, performing PWM (pulse width modulation) control on the motor by using the single chip microcomputer to realize the speed regulation of different gears of the fan; if the parameters for controlling the illuminating lamp 2 are changed, the singlechip can control the switch of the illuminating lamp 2; if the parameters of the heating warm cushion control module are changed, when the heating gear is set to be T ℃, the single chip microcomputer can control the relay to enable the carbon fiber heating wire 15 to be electrically heated to be heated to a corresponding gear. And after the adjustment is finished, the OLED display screen updates the display information in real time and continues to detect the key module 7. If the key module 7 is pressed, the corresponding parameters are continuously adjusted.

The utility model discloses a timer interrupt process does: firstly, the interrupt time length of a timer of 50ms is set, then the timer is initialized and the initial value of the timer is reset, and then the temperature sensor DS18B20 collects the temperature T in real time₀And C, and transmitting the data to a singlechip. Then the singlechip controls the real-time temperature T₀The temperature is compared with the set gear temperature T DEG C of the heating warm cushion. If it is T₀>T, closing the heating warm cushion to stop heating; if it is T-T₀<And 3, opening the heating warm cushion to start heating and temperature rise. Next, PWM control of the fan step is performed, and then ts timing of the timer is performed. If it is t>300s, namely judging whether the human body infrared sensor module detects a person after 5 minutes, if so, resetting the system timer by clearing time t, and timing again; if no person is detected in front of the desk plate, the single chip microcomputer resets, all the modules stop working, and the desk plate enters a standby state.

The circuit schematic diagram of the main control chip of the STC15 single chip microcomputer is shown in figure 8, the used main control chip is STC15F2K60S2, and the series of single chip microcomputers comprise a Central Processing Unit (CPU), a program memory (Flash), a data memory (SRAM), a timer, an IO port, high-speed A/D conversion, a watchdog, a UART ultra-high-speed asynchronous serial communication port 1/serial communication port 2, CCP/PWM/PCA, 1 group of high-speed synchronous serial ports SPI, an on-chip high-precision R/C clock, high-reliability reset and other modules. The STC15F2K60S2 series single-chip microcomputer almost comprises all unit modules required in data acquisition and control, and has complete functions and convenient use. Pins P2.0, P2.1 and P2.2 of the singlechip are connected with pins 6 ENA, pins 5 IN1 and pins 7 IN2 of 298N and are used for controlling the rotation of the motor and PWM speed regulation; a pin P3.2 of the singlechip is connected with a pin 2 DQ of two temperature sensors DS18B20, and temperature values acquired by the two temperature sensors are respectively read by utilizing the multipoint networking function of DS18B 20; pins P2.4 and P2.5 of the single chip are respectively connected with a base electrode of a PNP triode S8550 in the heating warm cushion control module and a base electrode of a PNP triode S8550 in the illuminating lamp control module, so that the temperature of the heating warm cushion is adjusted and the switch of the illuminating lamp is controlled; a P2.3 pin and a 1K resistor R23 of the singlechip are connected with a port of a BISS001 in the human body infrared sensor module after a 2 pin VO is connected in series, and the working state of the human body infrared sensor is scanned, so that corresponding safe and energy-saving treatment is performed; pins P1.0 and P1.1 of the singlechip are respectively connected with pins 2 SDA and 3 CLK in the four-pin OLED module to realize data writing and displaying; the P1.7 pin and the 10K resistor R2 of the singlechip are connected with the port of the buzzer module after the base of the PNP triode S8550 is connected in series, so that the functions of key press prompting and alarming are realized; the P1.2-P1.6 pins of the single chip are respectively connected with the ports of the five key modules, and the functions of key temperature regulation and the like are realized by scanning the electrical level of the key modules; the RXD/P3.1 and TXD/P3.0 pins of the singlechip are respectively connected with a 2-pin TXD of the CH340G, and a port formed by connecting a Schottky diode 1N5819 and a 3-pin RXD of the CH340G in series. In order to reduce voltage ripple and stabilize the power supply of the single chip microcomputer, two polar capacitors C10 and C11 are connected in parallel between VCC and GND of the single chip microcomputer.

The motor driving chip is 298N, and the schematic diagram of the motor driving module is shown in figure 9. 298N chip contains drive integrated circuit, belongs to H bridge integrated circuit, and its output current is 2A, maximum current 4A, and maximum operating voltage is 50V. L298N can receive standard logic level signal VSS, VSS can be connected with 4.5-7V voltage, 4-pin VS is connected with power supply voltage, VS voltage range is + 2.5V-46V, output current can reach 2A, and inductive load can be driven. The emitting electrodes of the lower tubes of the 1 pin and the 15 pin are respectively and independently led out so as to be connected with a current sampling resistor to form a current sensing signal, and the 1 pin and the 15 pin are directly grounded because the current sampling is not needed. 298N may drive two motors, 2OUT 1, 3 OUT2 and 13 OUT3, 14 OUT4 may be connected between the two motors respectively. The 5 pin IN1, the 7 pin IN2, the 10 pin IN3 and the 12 pin IN4 IN 298N receive input control level to control the positive and negative rotation of the motor. Pins 6 ENA and 11 ENB IN 298N are connected with a control enabling end to control the motor to stop rotating, when ENA is connected with high level to enable, the accessed levels of IN1 and IN2 are valid, otherwise, the motor stops rotating no matter what levels the IN1 and the IN2 are accessed; ENB is enabled for the same reason. If ENA is enabled to be connected with a high level, when IN1 is connected with a high level and IN2 is connected with a low level, OUT1 and OUT2 output voltage and current which can enable the motor to rotate forwards; when IN1 is connected to low level and IN2 is connected to high level, OUT1 and OUT2 output energy difference which enables the motor to rotate reversely; when IN1 and IN2 are at the same level, there is no energy difference between OUT1 and OUT2, and the motor does not rotate. If ENB is enabled high, IN3, IN4 are the same as IN1, IN 2. The device only needs to drive one fan, so that the motor only needs to be controlled by using IN1, IN2 and ENA, ENB IN 289N is connected with the ground to remove energy, IN1, IN2 and ENA are respectively connected with pins P2.1, P2.2 and P2.0 of the single chip microcomputer, and OUT1 and OUT2 are connected with two ends of a motor wire IN the fan. In addition, when there is a sudden change or decrease in the current of the motor, such as an inductive load, an abrupt voltage or an abrupt current is generated across the motor, which may damage 298N chips and other components. Therefore, OUT 1in 298N is connected with the anode of the freewheeling diode D3 and the cathode of D5, the cathode of the freewheeling diode D3 is connected with the circuit power supply, and the anode of the freewheeling diode D5 is connected with the power ground; and OUT2 is connected with the anode of freewheeling diode D4 and the cathode of D6, the cathode of freewheeling diode D4 is connected with the circuit power supply, and the anode of freewheeling diode D6 is connected with the power ground, so as to provide a path for sudden voltage current, the current can change more gently, the sudden voltage is avoided, and the motor driving circuit is more stable. If the speed of the fan is to be regulated, the P2.0 pin is used for PWM control of the ENA driving module, so that the speed regulation of different gears of the fan can be realized.

The temperature sensor adopts DS18B20, the device adopts two DS18B20 temperature sensors, and the schematic diagram of the temperature sensor module is shown in figure 10. The temperature measuring range of the temperature sensor DS18B20 is from-55 ℃ to +125 ℃, and the highest measuring precision can reach 0.0625 ℃. The bit number of the temperature conversion result of the DS18B20 can be determined by software programming, a digital signal with 9-12 bits can be output, and the default bit number of the temperature conversion result is 12 bits. When the conversion accuracy of DS18B20 is 12 bits (default accuracy), the maximum conversion time for performing one temperature acquisition conversion is 750 MS. DS18B20 does not need any peripheral component in use, and all sensing elements and conversion circuits are integrated in the temperature sensor, and when being connected with the singlechip, the singlechip can realize the bidirectional communication with DS18B20 by only needing one IO port. The DS18B20 has a unique 64-bit serial number in the ROM, so that the function of multipoint networking is supported, and a plurality of DS18B20 can be hung on one bus to realize the function of single-line multipoint temperature measurement. DS18B20 may be powered by two means: an external power supply working mode and a parasitic power supply mode. An external power supply is needed in the working mode, a 3-pin VDD of the temperature sensor is connected with a 5V power supply, and a 1-pin GND of the temperature sensor is connected with a GND power supply; in the parasitic power supply mode, an external power supply is not needed, when the 2-pin DQ of the temperature sensor is at a high level, the stable power supply of the temperature sensor is powered up by pulling up a pull-up resistor on a DQ line, and when the 2-pin DQ line of the temperature sensor is at a low level, the stable power supply of the temperature sensor is powered by a capacitor inside the stable power supply, and in the mode, the 3-pin VDD and the 1-pin GND of the temperature sensor are both connected with the GND of the power supply. As shown in fig. 12, two DS18B20 are hooked on a P3.2 line of a single chip microcomputer, a temperature sensor adopts an external power supply working mode, 2 pins DQ of two DS18B20 are connected with a 10K pull-up resistor R9, and a 0.1uF polarity capacitor C24 is connected between a 1 pin GND and a 3 pin VDD, so that the anti-interference capability of the DS18B20 can be enhanced, and the working stability can be ensured.

The heating warm cushion control module and the lighting control module are shown in figure 11. Because the temperature is a slowly changing quantity, the temperature of the heating wire in the heating pad can be adjusted by utilizing the on-off power supply and the off-off power loss of the relay. The heating warm cushion control module indirectly controls the S8550 triode Q2 by utilizing the single chip microcomputer, so that the effect of controlling the relay K1 coil can be achieved, and the heating warm cushion is controlled to adjust the temperature. As shown in fig. 11, the base of the S8550 transistor Q2 is connected to the P2.4 pin of the single chip, and a 10K pull-up resistor R3 is connected, so that the base voltage of the S8550 is default to high level, that is, the S8550 transistor Q2 is in a cut-off state by default (the relay coil does not work by default), the emitter of the transistor Q2 is connected to a 5V regulated power supply, and the collector is connected to one end of the relay K1 coil. One end of the coil of the relay K1 is connected with the collector of the S8550 triode Q2 and the cathode of the fly-wheel diode D7, the other end is connected with the power supply GND and the anode of the fly-wheel diode D7, the LED indicator lamp D8 is connected with a 4.7K resistor R4 in series and then connected to the two ends of the relay in parallel, the resistor R4 plays a role in limiting current, and the LED is used for indicating whether the coil works or not. When the single chip microcomputer P2.4 outputs low level, the S8550 triode Q2 is conducted, the coil of the relay K1 is electrified, the relay switch is closed, and the heating wire is electrified to generate heat; when the single chip microcomputer P2.4 outputs high level, the S8550 triode Q2 is cut off, the coil of the relay K1 loses power, the relay switch is disconnected, and the heating wire loses power and does not generate heat. When a pin P2.4 of the singlechip outputs a rising edge, the coil of the relay K1 is electrified and then loses electricity to generate certain reverse pulse, and at the moment, the freewheeling diode provides a path for the reverse pulse, so that the working stability of the circuit is ensured. The temperature control effect can be achieved by controlling the coil of the relay K1 within a certain temperature difference range.

The working principle of the lighting lamp control module is similar to that of the heating warm cushion, and as shown in fig. 12, the base of the S8550 triode Q3 is connected with P2.5 of the single chip microcomputer.

The human body infrared sensor module is shown in the schematic diagram of fig. 13. The human body has a constant body temperature, generally 37 ℃, so that infrared rays with a specific wavelength of about 10um can be emitted, and the infrared rays with the wavelength of about 10um emitted by the human body can be concentrated on the infrared induction source after being enhanced by the Fresnel lens. The infrared sensing source of the device adopts a pyroelectric sensor LHI778, when the infrared radiation temperature of a human body is received by the element, a signal loses charge balance, charges are released outwards to generate a voltage signal, and then the signal is amplified and output by a two-stage amplifying circuit inside the BISS0001 and can be identified and processed by a single chip machine. Among them, the fresnel lens has two effects: firstly, focusing, namely refracting the pyroelectric infrared signals on the pyroelectric sensor; the second function is to divide the detection area into a plurality of bright areas and dark areas, so that the moving object entering the detection area can generate a pyroelectric infrared signal on the pyroelectric sensor in the form of temperature change. As shown in fig. 13, a 1-pin D, a 2-pin S, and a 3-pin G of the LHI778 pyroelectric sensor U12 are respectively a positive sensor terminal, a signal terminal, and a negative sensor terminal. When infrared rays radiated from a human body are focused on the pyroelectric sensor through the Fresnel lens, the sensor in the circuit outputs a voltage signal which passes through a band-pass filter composed of C25 and R17, and allows the generated signal to move by infrared rays of about 10 um. Because the voltage of the detection signal output by the LHI778 pyroelectric sensor U12 is very weak and is a changing signal, and at the same time, the output signal is in a pulse form due to the action of the fresnel lens, the voltage signal output by the pyroelectric infrared sensor needs to be amplified. The module uses a two-stage operational amplifier inside the BISS0001 to carry out two-stage amplification on the signal, so that the signal can obtain enough gain. The photoresistor R12 is connected in series with the 1M resistor R11, then the 9 pins VC of the BISS0001 chip U11 are connected, the other ends of the two resistors in series are connected with a power supply GND, and the photoresistor R12 plays a role in illumination compensation. The 12 pin 2OUT of the BISS0001 chip U11 is the output end of the second-stage operational amplifier, the 13 pin 2 IN-is the inverting input end of the second-stage operational amplifier, the 14 pin 1IN + is the non-inverting input end of the first-stage operational amplifier, the 15 pin 1 IN-is the inverting input end of the first-stage operational amplifier, the 16 pin 1OUT is the output end of the first-stage operational amplifier, the 2OUT, the 2IN-, 1IN +, 1IN-, 1OUT pins IN the BISS0001 chip U11 are connected with a peripheral resistor capacitor to form a two-stage amplifying circuit, the voltage signal output by the pyroelectric infrared sensor is amplified, the amplified signal output is a 2-pin VO of a BISS0001 chip U11, the VO output end is connected with a 1K pull-up resistor R23 to form a reference voltage to prevent the signal from being too small, the adjustment of the slide rheostat R13 can adjust the amplification gain, namely, the adjustment of the detection distance of the pyroelectric infrared sensor can be used. The 3 pin RR1 of the BISS0001 chip U11 is an adjusting end of the output delay time TX, the 4pin RC1 is an adjusting end of the output delay time TX, the 5 pin RC2 is an adjusting end of the trigger blocking time Ti, the 6 pin RR2 is an adjusting end of the trigger blocking time Ti, RR1 and RC 1in the BISS0001 chip U11 and a peripheral 10K resistor R21, a 1M sliding rheostat R20 and a 0.01uF capacitor C31 form a circuit capable of adjusting the output delay time, and the level after triggering in the output delay time period is kept for a period of time. Pin 1A in the BISS0001 chip U11 is a repeatable trigger and non-repeatable trigger selection terminal, and when pin A is connected with high level, repeated triggering is allowed; otherwise, the triggering cannot be repeated. Pin a is 3.3V regulated, i.e., high, as shown in fig. 13, allowing for repeated triggering.

The schematic diagram of the voltage regulation module is shown in fig. 14, a voltage regulation chip LM7805 is adopted for the 5V voltage regulation module, and a HT7133-1 chip is adopted for the 3.3V voltage regulation module. The device uses a 12V power supply, the maximum input voltage of the LM7805 is 35V, the input-output difference needs to be kept more than 2V, the output voltage is 4.8V-5.2V, the typical output voltage value is 5.0V, the output peak current can reach 2.2A, and the power supply work of corresponding modules can be met. As shown in fig. 14, an LM7805 voltage stabilization chip U5 has input terminals of the chip connected in parallel to GND and 47uF polar capacitors C12 and 10uF polar capacitors C13, output terminals of the chip connected in parallel to GND and 10uF polar capacitors C14 and 470uF polar capacitors C15, and capacitors C12, C13, C14, and C15 all function to filter ripples and increase stability of a power supply. The device uses four LM7805 voltage stabilizing circuits, wherein one of the four LM7805 voltage stabilizing circuits independently supplies power to the STC15 single chip microcomputer, so that the single chip microcomputer has a stable voltage stabilizing power supply, and the other three modules respectively supply power to corresponding modules. The HT7133-1 chip U10 is a 3.3V voltage-stabilized output chip, a stabilized power supply supplies power to the human body infrared sensor, a pin 2 VIN of the HT7133-1 chip U10 is connected with a cathode of a 1N5819 diode D12, an anode of the 1N5819 diode D12 is connected with a 5V voltage-stabilized power supply, and the diode D12 can have a certain anti-reverse connection effect and protect the HT7133-1 from being damaged.

A schematic diagram of the display module is shown in fig. 15. The display module adopts a 4PIN OLED, the SDA is a data line, the CLK is a clock line, and the SDA and the CLK are respectively connected with the P1.0 PIN and the P1.1 PIN of the singlechip. The singlechip utilizes the two pins to simulate IIC time sequence to communicate with the OLED, and corresponding data parameters can be displayed on the OLED by writing display data into the OLED. The power supply used by the device is a 12V power supply, and the main switch S1 can control the power supply of all the modules.

The schematic diagram of the buzzer control module is shown in figure 16. The buzzer is driven by a PNP triode S8550, as shown in figure 16, the base of an S8550 triode Q1 is connected with a 10K resistor R2 in series, the other end of the R2 resistor is connected with a P1.7 pin of the singlechip, and the R2 resistor can prevent signal overload and improve impedance. The emitter of the S8550 triode Q1 is connected with a 5V regulated power supply, the collector of the triode Q1 is connected with the positive end of the buzzer LS1, and the negative end of the buzzer LS1 is connected with the power supply GND. When the P1.7 pin of the singlechip outputs low level, the S8550 triode Q1 is conducted, and the buzzer LS1 sounds; when the P1.7 pin of the single chip microcomputer outputs high level, the S8550 triode Q1 is cut off, and the buzzer LS1 loses power and does not sound.

The key module is shown in the schematic diagram of fig. 17, the key module comprises 5 touch keys, one ends of the five touch keys are connected with a power supply GND, and the other ends of the five touch keys are connected with P1.2-P1.6 of the single chip microcomputer. The programming of the key function can be realized by pulling up the pin software and eliminating the shake of the software through the singlechip.

Fig. 18 shows a schematic diagram of the SB to TTL download module. The CH340G chip U3 is a switching chip of a USB bus, can realize USB to serial port or USB to print the port, this module can realize the download to the one-chip computer program under cooperating with STC-ISP software. An 8-pin XO of a CH340G chip U3 is an output end of crystal oscillation and needs an external crystal and a capacitor, a 7-pin XI is an input end of the crystal oscillation and also needs the external crystal and the capacitor, so a 12MHz crystal oscillator X1 is connected between the XI and the XO in series, and the XI and the XO are respectively connected with a power supply GND in series with 22pF capacitors C8 and C9. When the chip U3 of the CH340G is connected with a 5V power supply voltage, a decoupling capacitor of 0.01uF is required to be connected to the 4-pin V3, and then the other end of the capacitor C7 is connected with a power supply GND. The 2-pin TXD of the CH340G chip U3 is connected with the RXD of the single chip microcomputer, the 3-pin RXD of the CH340G chip U3 is connected with the cathode of a 1N5819 diode D2, the anode of a 1N5819 diode D2 is connected with the TXD of the single chip microcomputer, and the diode D2 ensures that signals of the single chip microcomputer can only be transmitted to the CH340G in a one-way mode, so that the 3-pin RXD of the CH340G is prevented from influencing the program downloading of the single chip microcomputer.

The working process and the using method of the utility model are as follows. When the device is used, the positions of the table legs 11 are adjusted, the table board 1 is placed stably, and the power switch is turned on. And the single chip microcomputer sends control signals to each module through the key module 7. Then, the temperature gear, the constant temperature duration, the illumination lamp brightness and the fan wind power of the electric warming cushion are continuously set through the key module 7, and the OLED display screen can display modified parameters in real time. When the temperature of the electric warming cushion reaches a set temperature gear, stopping heating and switching to a constant temperature mode; and when the set constant temperature duration is reached, stopping heat preservation and sending out a prompt tone, wherein the constant temperature is ended, and the system is switched to a standby mode. When the electric heating cushion is used, if the heating position of the electric heating cushion on the table board is required to be adjusted, the position of the electric heating cushion can be adjusted by pulling the position adjuster 10 of the electric heating cushion. When the human body infrared sensing device 8 does not detect people in3 meters in front of the table plate within 5 minutes, the single chip microcomputer resets, and all the modules stop working. When needs use light 2, fan 3, only need pull out it from this side of table, adjust suitable position, through touch switch I, touch switch II adjust can. When the power plug 4 is connected for charging, the charging indicator lamp is on, and when the charging is completed, the charging indicator lamp is turned off. When the table top needs to be placed obliquely, the wooden baffle 17 on the front side can be pulled up. When the device is not used and needs to be stored, the switch is closed, the table legs 11 are folded, and the illuminating lamp 2, the fan 3 and the wooden baffle 17 are put back to complete storage.

Claims (10)

1. The utility model provides a multi-functional warm table of electricity that intelligence adjusted temperature which characterized in that: the table comprises a table plate, a plug, a plastic insulating waterproof box, table legs, a plastic insulating waterproof box I, an electric heating cushion and a control circuit, wherein the four corners of the lower surface of the table plate are provided with foldable table legs, the right side of the upper surface of the table plate is provided with a groove I, the electric heating cushion is arranged in the groove I and comprises a cushion I, a heat-conducting cushion II and a carbon fiber heating wire, the cushion I is placed in the groove I, the inside of the cushion I is provided with a plurality of carbon fiber heating wires coated with a layer of heat-resistant resin, the carbon fiber heating wire is provided with a temperature sensor, the heat-conducting cushion II is laid on the upper surface of the table plate, the lower surface of the heat-conducting cushion II is contacted with the cushion I, the right side of the table plate is provided with the plastic insulating waterproof box I, the plastic insulating waterproof box I is internally provided with, display module and button module have been inlayed on the insulating waterproof box of plastics I, and I next door of the insulating waterproof box of plastics is equipped with two hole plugs embedded in the table inside, and bee calling organ control module sets up on the table, control circuit includes main control chip singlechip, is used for the motor drive module of driving the fan, is used for controlling the warm cushion control module of electric heating of carbon fiber heater temperature, is used for the bee calling organ control module of warning, and display module, button module, temperature sensor, carbon fiber heater, motor drive module, warm cushion control module of electric heating, bee calling organ control module all link to each other with the singlechip.

2. The intelligent temperature-regulating multifunctional electric heating table board as claimed in claim 1, wherein: the I embedded waterproof box II that has plastics of recess, cushion I is placed in waterproof box II of plastics insulation, and I upper surface of cushion and table upper surface parallel and level.

3. The intelligent thermoregulation multifunctional electric heating table board of claim 2, characterized in that: the utility model discloses a table, including table, electrically warmed cushion position adjuster, electrically warmed cushion I is adjusted the position in plastic insulation waterproof box II through adjusting in the position on the table of chute track.

4. The intelligent thermoregulation multifunctional electric heating table board of claim 2, characterized in that: the desk plate upper surface rear end is equipped with recess II, is equipped with the light in the recess II, and the light passes through hose fixed mounting on the right side cell wall of recess II, and the fluorescent tube of light is fire-retardant insulating plastic material, is equipped with the touch switch I of adjusting light luminance on the fluorescent tube, and the light is connected with the singlechip.

5. The intelligent thermoregulation multifunctional electric heating table board of claim 2, characterized in that: the desk plate upper surface left side is equipped with recess III, is equipped with the fan in the recess III, and the fan passes through bellows fixed mounting on the cell wall of recess III, is equipped with touch switch II of adjusting the wind-force size on the fan, and the fan is connected with the singlechip.

6. The intelligent thermoregulation multifunctional electric heating table board of claim 2, characterized in that: the shape of the front end of the table plate is rectangular, four corners of the table plate are round corners, the front end of the table plate is in an inwards-concave arc shape, and the bending radian is 160 degrees.

7. The intelligent thermoregulation multifunctional electric heating table board of claim 2, characterized in that: push-up type baffles are symmetrically arranged on two sides of the front end of the table plate, and the outer sides of the push-up type baffles are parallel to the edge of the table plate.

8. The intelligent thermoregulation multifunctional electric heating table board of claim 2, characterized in that: the human body infrared sensor module is arranged at the front end of the table plate and connected with the single chip microcomputer.

9. The intelligent thermoregulation multifunctional electric heating table board of claim 2, characterized in that: the bottom of the table legs is wrapped with a cotton pad.

10. The intelligent thermoregulation multifunctional electric heating table board of claim 2, characterized in that: the cushion I is made of a synthetic resin material, and the cushion II is made of a heat-conducting waterproof material.

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