CN110568796A - Intelligent home system based on single chip microcomputer control - Google Patents
Intelligent home system based on single chip microcomputer control Download PDFInfo
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- CN110568796A CN110568796A CN201910910998.1A CN201910910998A CN110568796A CN 110568796 A CN110568796 A CN 110568796A CN 201910910998 A CN201910910998 A CN 201910910998A CN 110568796 A CN110568796 A CN 110568796A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24215—Scada supervisory control and data acquisition
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Abstract
The invention discloses an intelligent home system based on single-chip microcomputer control. Aiming at the requirements and the method of the intelligent home system, STC89C52 is adopted as a core controller, an HX1838 integrated chip is adopted as a core device, and the core device is combined with an A/D conversion chip TLC549C to form the requirements of home equipment for medium-remote control and full-automatic intelligent control; time information is automatically generated by using a clock chip DS 1302; reading temperature data is realized by adopting DS18b 20; the conversion of the analog quantity generated by the photoresistor 5537 into a digital quantity is completed by TLC 549C; the current is amplified by using a driving chip ULN2003L so as to drive the controlled household appliance; the relay SRD-05V is used for realizing small current control and large current control, so that the STC89C52 chip is used for controlling the household appliance; the time information and the temperature information are displayed using the liquid crystal display LCD 1602.
Description
Technical Field
The invention relates to remote infrared remote control of household equipment, and can realize full-automatic intelligent control.
Background
With the rapid development of science and technology and the continuous improvement of the living standard of people, a series of applications using a single chip microcomputer as a control core also continuously enter our lives. Therefore, the smart home system based on the single chip microcomputer control is produced. Based on the 51 single chip microcomputer, the infrared remote control device and the modularized device, the design and the manufacture of the multifunctional and high-performance electronic product are not complicated any more. The invention takes a 51 single chip microcomputer as a main core processor, an infrared receiving circuit as a remote end receiving controller, an external clock chip is adopted to provide time information, and meanwhile, a system carries a plurality of sensors, so as to achieve the effect of intelligent control. In addition, the invention is also provided with a liquid crystal display, so that a user can directly check the current time and the indoor temperature.
Disclosure of Invention
The invention aims to provide an intelligent home system based on single-chip microcomputer control, and aims to solve the problems that a large number of household appliances exist in a home, so that the number of switches is large, the number of remote controllers is large, individual household appliances cannot be switched on and off regularly, the safety problem cannot be treated in a unified mode, and the like.
The technical scheme adopted by the invention is as follows:
The invention discloses an intelligent home system based on single chip microcomputer control, which comprises a 51 single chip microcomputer circuit, an infrared receiving circuit, a clock circuit, an illumination detection circuit, a temperature detection circuit, an A/D conversion circuit and a drive circuit, wherein the 51 single chip microcomputer circuit is connected with a power supply circuit, the clock circuit, the infrared receiving circuit, the temperature detection circuit and the drive circuit, and the illumination detection circuit is connected with the A/D conversion circuit;
The 51 single chip microcomputer circuit adopts STC89C52, a drive chip ULN2003L is used for completing current amplification so as to drive the controlled household appliance, meanwhile, a relay SRD-05V is used for realizing small current control and large current control, and a main controller STC89C52 is used for controlling the household appliance;
The relay SRD-05V is used for realizing small current control and large current control, and further realizing STC89C52 chip control of the household appliance, and 3 terminals are arranged on the SRD-05V, wherein the 1 and 2 terminals are normally closed terminals, and the 1 and 3 terminals are normally open terminals; when the control end of the singlechip STC89C52 sends a high level to the B pole of the triode, the triode Q1 is conducted, the light-emitting diode LED1 works, meanwhile, the coil is electrified to generate an electromagnetic effect, the relay is attracted, and the 1 end and the 3 end are connected; when the control end of the singlechip supplies low level to the B pole of the triode, the triode Q1 is cut off, no current flows through the coil, no electromagnetic effect is generated, and the 1 and 3 ends are restored to be in a normally open state; all the diodes D3 are connected in parallel in reverse direction at two ends of the coil, the diode D3 is a consumption diode, the diode does not work in normal operation, a strong back electromotive force is generated on the coil in the moment when the relay is powered off, and D3 is used for consuming the back electromotive force.
Furthermore, a remote control device is formed by a 38KHZ remote controller and an infrared receiving head HX1838 and is used for transmitting and receiving infrared signals so as to achieve medium and long distance control;
further, the luminosity collection module collects luminosity analog quantity by using a photoresistor 5537, converts the luminosity analog quantity into digital quantity by using an A/D conversion circuit TLC549C chip and transmits the digital quantity to STC89C 52.
Furthermore, the temperature detection circuit utilizes the temperature sensor DS18b20 to read and transmit temperature data to STC89C 52.
Further, the clock circuit automatically generates time information using the clock chip DS1302 to transmit to the STC89C 52.
further, a manual mode, an automatic mode or a custom setting mode is selected by a key.
further, the system also comprises a liquid crystal display circuit connected with the 51 SCM circuit, and displays time information, temperature information and current mode information by using a Liquid Crystal Display (LCD) 1602.
Furthermore, the power circuit is connected with the 51 singlechip circuit.
The invention has the advantages of
The invention adopts STC89C52 as a core controller, takes an HX1838 integrated chip as a core device, is combined with an A/D conversion chip TLC549C, and forms the requirements of the household equipment for medium-remote control and full-automatic intelligent control under the control of STC89C 52; the clock chip DS1302 is used for automatically generating time information of second, minute, hour, day, week, month and year; reading temperature data is realized by adopting DS18b 20; the conversion of the analog quantity generated by the photoresistor 5537 into a digital quantity is completed by TLC 549C; the current is amplified by using a driving chip ULN2003L so as to drive the controlled household appliance; the relay SRD-05V is used for realizing small current control and large current control, so that the STC89C52 chip is used for controlling the household appliance; the time information and the temperature information are displayed using the liquid crystal display LCD 1602.
drawings
FIG. 1 is a general schematic diagram of the design of a 51-chip microcomputer software system.
FIG. 2 is a flow chart of the design of a 51-chip microcomputer software system.
Fig. 3 is a schematic diagram of a 51-chip microcomputer minimum system.
Fig. 4 is a schematic diagram of the infrared remote control principle.
Fig. 5 is a schematic diagram of an infrared receiving circuit.
Fig. 6 is a schematic diagram of a photometric acquisition circuit.
Fig. 7 is a schematic diagram of a relay circuit.
fig. 8 is a clock circuit schematic.
Fig. 9 is a schematic design diagram of a smart home system based on single-chip microcomputer control.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the following detailed description refers to the accompanying drawings and examples.
FIG. 1 is a general schematic diagram of the design of a 51-chip microcomputer software system. In the whole system, the main controller STC89C52 plays a key role, and the functions of decoding infrared signals, state switching control of household equipment, display interface updating and the like are all completed by the main controller STC89C 52. The design of the STC89C52 software system is mainly divided into five modules: the first is a key mode selection module, and the system can be selected to work in a manual mode, an automatic mode or a self-defined setting mode through keys; the second is infrared signal decoding, which is a remote control device composed of a 38KHZ remote controller and a HX1838 infrared receiving head and used for transmitting and receiving infrared signals to achieve medium and long distance control, thereby separating from the traditional fixed place switch; the third is a luminosity acquisition module, which acquires luminosity analog quantity by using a photoresistor 5537, converts the luminosity analog quantity into digital quantity by using a chip TLC549C and transmits the digital quantity to STC89C 52; the fourth step is temperature data acquisition, namely, a temperature sensor DS18b20 is utilized to read temperature data and transmit the temperature data to STC89C 52; the fifth step is time information reading, and second, minute, hour, day, week, month and year time information is automatically generated by using a clock chip DS1302 and is transmitted to the singlechip; the sixth is a display module, which displays time information and temperature information by using a Liquid Crystal Display (LCD) 1602; and the seventh module is a household equipment module, a drive chip ULN2003L is used for amplifying current so as to drive the controlled household equipment, and a relay SRD-05V is used for realizing small current control and large current control so as to control the household equipment by a main controller STC89C 52. Compared with other common household systems, the system is more integrated, intelligent and personalized, can control multiple paths of household appliances simultaneously in the system in an integrated mode, is matched with a relay change-over switch, and is suitable for most household appliances in the market. The intellectualization is realized in that the system is matched with HX1838 to complete remote control; the DS18b20 chip completes temperature control; the photoresistor 5537 is matched with a chip TLC549C to complete the control of luminosity; the chip DS1302 completes the functions of timing, reservation, etc. of the device. The individuation is embodied in that the user can complete the setting of information such as temperature, luminosity, time timing and the like according to personal requirements.
FIG. 2 is a flow chart of the design of a 51-chip microcomputer software system. The main tasks of the STC89C52 are decoding of infrared signals, state switching control of household equipment, reading and display interface updating of temperature and luminosity information and user personalized information setting. First, STC89C52 needs to complete the initialization of the system, then read the time, temperature, luminosity and other information, and display the temperature information and the time information on the main interface display. The system then scans the keys for a determination of whether the keys have been pressed. When the manual mode key is pressed, the program starts to read the signal in the infrared receiving circuit, the equipment performs corresponding operation according to the received corresponding infrared signal, and returns to perform cycle operation after the operation is completed. When the automatic mode key is pressed, the operation or non-operation of the equipment is controlled by judging whether the temperature information, the luminosity information and the time timing which are read above reach the corresponding threshold values. When the user-defined setting mode is pressed, an object to be set is selected through a key, information to be set is input, and finally, the operation is returned to carry out circular operation.
Fig. 3 is a schematic diagram of a 51-chip microcomputer minimum system. The main task of the 51-singlechip minimum system is to provide peripheral circuits required by normal work of the chip STC89C 52. Wherein a crystal oscillator of 12MHZ is used to provide the basic clock signal for the system. The independent keys and the resistor and the capacitor are used for forming a reset circuit, so that the circuit can realize power-on reset and key reset.
Fig. 4 is a schematic diagram of the infrared remote control principle. The infrared remote control system is divided into a transmitting part and a receiving part. A remote control device is composed of a 38KHZ remote controller and an HX1838 infrared receiving head. The main component of the infrared emitting part is an infrared light emitting diode. The remote controller mainly comprises a key circuit, a coding system, a modulation circuit, an amplifying circuit, a transmitting circuit and the like. When a certain key is pressed by the remote controller, the coding circuit can generate a corresponding coding signal, then modulation and power amplification are carried out, and finally, the transmitting circuit transmits the signal outwards. The main element of the receiving section is a photodiode. The infrared receiving circuit mainly comprises a receiving circuit, an amplifying circuit, a modulating circuit, a decoding circuit and the like. The receiving circuit modulates and demodulates the signal emitted by the infrared remote controller to restore the signal into the original code emitted by the remote controller, and finally transmits the original code to the singlechip
Fig. 5 is a schematic diagram of an infrared receiving circuit. The main chip of the infrared receiving circuit adopts HX1838, which is different from the general TL0038 receiver in the market, the receiver has lower power consumption, higher sensitivity and stronger anti-interference capability, and the maximum receiving distance can reach about 18 meters. The peripheral circuit of the receiving circuit consists of an R5 current-limiting resistor, an R6 pull-up resistor and a filter capacitor connected between the power supply and the ground.
Fig. 6 is a schematic diagram of a photometric acquisition circuit. The luminosity acquisition circuit mainly selects TLC549C as a chip, the circuit is composed of a photoresistor and an AD conversion chip, and analog signals acquired by the photoresistor are converted into digital signals through the AD converter and sent to the singlechip. The resistor R4 is used to divide the voltage with the light sensitive resistor, and the resulting analog signal is transmitted to the ANLGIN (analog signal input) port of the chip. The capacitor C1 connected between the power supply and ground is used to filter out noise of the power supply and smooth the pulsating dc voltage. Two diodes as reverse connection protection device
Fig. 7 is a schematic diagram of a relay circuit. The relay SRD-05V is adopted to realize small current control and large current control, and further realize that the STC89C52 chip controls the household appliance. The relay and the universal socket are matched in the system, so that the system can be directly connected with most of household appliances, and the universality of the system is greatly improved. It can be seen that there are 3 terminals at Ps, where the 1, 2 ends are normally closed ends and the 1, 3 ends are normally open ends. When the control end of the singlechip supplies high level to the B pole of the triode, the triode Q1 is conducted, the light emitting diode LED1 works, meanwhile, the coil is electrified to generate electromagnetic effect, the relay is attracted, and the 1 end and the 3 end are connected; when the control end of the single chip microcomputer sends low level to the B pole of the triode, the triode Q1 is cut off, no current flows through the coil, no electromagnetic effect is generated, and the 1 end and the 3 end are restored to be in a normally open state. Wherein the D3 diode is also called a depletion diode. When the relay works normally, the diode does not work, a strong reverse electromotive force can be generated on a coil at the moment when the relay is powered off, if the diode is not added, the reverse electromotive force can directly act on the triode, the triode is easy to burn, and the diode is reversely connected in parallel at two ends of the coil to consume the reverse electromotive force.
fig. 8 is a clock circuit schematic. The clock circuit main chip selects the DS1302, and the chip can automatically generate time information of second, minute, hour, day, week, month and year, and then the time information is read and transmitted by the main control chip STC89C52 to be displayed on the display circuit LCD 1602. The chip is a serial interface real-time clock chip from Dallas corporation, usa. It has two power supplies, one being a main power supply and the other being a backup power supply. Meanwhile, a crystal oscillator of 32.768KHz is externally connected as an external oscillation source of the chip.
Fig. 9 is a schematic design diagram of a smart home system based on single-chip microcomputer control. It mainly introduces some chips needed by system design, and the connection mode between chips and their peripheral circuit construction.
The invention discloses an intelligent household method based on single chip microcomputer control, which comprises the following steps
Step 1, STC89C52 needs to complete the initialization of the system, then reads the information of time, temperature, luminosity and the like, and displays the temperature information, the time information and the current mode information on a main interface display;
Step 2, the system scans the key to judge whether the key is pressed down; when a manual mode key is pressed, a program starts to read signals in the infrared receiving circuit, the equipment performs corresponding operation according to the received corresponding infrared signals, and returns to perform circulating operation after the corresponding operation is completed;
And 3, when the automatic mode key is pressed, controlling the equipment to work or not to work by judging whether the read temperature information and the read luminosity information reach the corresponding threshold values or not.
And 4, when the user-defined setting mode key is pressed down, selecting an object to be set through a key, such as time timing, a temperature threshold value, a luminosity threshold value and the like. And inputting information to be set, and returning to perform circulating operation after finishing the inputting.
Claims (8)
1. An intelligent home system based on single-chip microcomputer control is characterized by comprising a 51 single-chip microcomputer circuit, an infrared receiving circuit, a clock circuit, an illumination detection circuit, a temperature detection circuit, an A/D conversion circuit and a drive circuit, wherein the 51 single-chip microcomputer circuit is connected with a power supply circuit, the clock circuit, the infrared receiving circuit, the temperature detection circuit and the drive circuit, and the illumination detection circuit is connected with the A/D conversion circuit;
The 51 single chip microcomputer circuit adopts STC89C52, a drive chip ULN2003L is used for completing current amplification so as to drive the controlled household appliance, meanwhile, a relay SRD-05V is used for realizing small current control and large current control, and a main controller STC89C52 is used for controlling the household appliance;
The relay SRD-05V is provided with 3 terminals, wherein the ends 1 and 2 are normally closed ends, and the ends 1 and 3 are normally open ends; when the control end of the singlechip STC89C52 sends a high level to the B pole of the triode, the triode Q1 is conducted, the light-emitting diode LED1 works, meanwhile, the coil is electrified to generate an electromagnetic effect, the relay is attracted, and the 1 end and the 3 end are connected; when the control end of the singlechip supplies low level to the B pole of the triode, the triode Q1 is cut off, no current flows through the coil, no electromagnetic effect is generated, and the 1 and 3 ends are restored to be in a normally open state; all the diodes D3 are connected in parallel in reverse direction at two ends of the coil, the diode D3 is a consumption diode, the diode does not work in normal operation, a strong back electromotive force is generated on the coil in the moment when the relay is powered off, and D3 is used for consuming the back electromotive force.
2. The smart home system based on the single chip microcomputer control according to claim 1, wherein the infrared remote control system is divided into a transmitting part and a receiving part; a remote control device is formed by a 38KHZ remote controller and an infrared receiving head HX1838 and is used for transmitting and receiving infrared signals so as to achieve medium and long distance control; the main element of the infrared emission part is an infrared light emitting diode; the remote controller comprises a key circuit, a coding system, a modulation circuit, an amplifying circuit and a transmitting circuit, wherein when the remote controller presses a certain key, the coding circuit can generate a corresponding coding signal, then the modulation and power amplification are carried out, and finally the transmitting circuit transmits the signal outwards; the receiving part is a photosensitive diode; the infrared receiving circuit comprises a receiving circuit, an amplifying circuit, a modulating circuit and a decoding circuit; the receiving circuit modulates and demodulates the signal emitted by the infrared remote controller to restore the signal into an original code emitted by the remote controller, and finally transmits the original code to the singlechip.
3. The smart home system based on the single chip microcomputer control of claim 1, wherein the luminosity collection module collects luminosity analog quantity by using a photosensitive resistor 5537, converts the luminosity analog quantity into digital quantity by using an A/D conversion circuit TLC549C chip and transmits the digital quantity to STC89C 52; the R4 resistor is used for carrying out voltage division with the photoresistor, and an obtained analog signal is transmitted to an analog signal input end port of the chip; a capacitor C1 connected between the power supply and the ground is used for filtering noise waves of the power supply and smoothing pulsating direct current voltage; the two diodes D1, D2 act as reverse-connected protection devices.
4. The smart home system based on single-chip microcomputer control of claim 1, wherein the temperature detection circuit utilizes a temperature sensor DS18b20 to read and transmit temperature data to STC89C 52.
5. The smart home system based on single chip microcomputer control of claim 1, wherein the clock circuit automatically generates time information by using the clock chip DS1302 and transmits the time information to the STC89C 52.
6. The smart home system based on single chip microcomputer control of claim 1, wherein a manual mode or an automatic mode is selected by a key.
7. The smart home system based on single chip microcomputer control of claim 1, further comprising a liquid crystal display circuit connected to the 51 single chip microcomputer circuit, wherein the liquid crystal display LCD1602 is used to display time information, temperature information and current mode information.
8. The smart home system based on single-chip microcomputer control of claim 1, wherein the power circuit is connected with a 51-chip microcomputer circuit.
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| CN201910910998.1A CN110568796A (en) | 2019-09-25 | 2019-09-25 | Intelligent home system based on single chip microcomputer control |
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| CN201910910998.1A CN110568796A (en) | 2019-09-25 | 2019-09-25 | Intelligent home system based on single chip microcomputer control |
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2019
- 2019-09-25 CN CN201910910998.1A patent/CN110568796A/en active Pending
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| CN105404256A (en) * | 2015-11-26 | 2016-03-16 | 国网山东无棣县供电公司 | GSM-based intelligent household system |
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