CN107153379A - A kind of intelligent switch - Google Patents

Abstract

The invention discloses a kind of intelligent switch, including respectively, the key-press module inputted for the clock circuit of Time Calculation, the numeral method module for showing the time, temperature collect module, the bell circuit of temperature over-range, function selection with parameter, the relay switch circuit of control apparatus switch and the system with monolithic mechatronics reset the reset circuit resetted.The intelligent switch is controlled using single-chip microcomputer, and circuit is simple, occupies little space, and electrical equipment temperature detect switch (TDS) and time switch can be achieved.

Description

a smart switch

technical field

The invention relates to the control field of smart home, in particular to an intelligent switch.

Background technique

With the development of science and technology and the increase of people's living needs, people's ways and attitudes towards life have undergone great changes. In their own homes, they are pursuing convenience and intelligence. However, in today's families, the control of most home appliances has not become more convenient and intelligent, and the use of electrical appliances is still controlled by yourself; and the traditional switch can no longer fulfill the functions people want, and cannot meet the needs of people's lives today. Demand, so we need a new control method, smart switch can solve these problems well. Despite this, smart switches have not been popularized in life, and the functions of smart switches are relatively single, which cannot make life convenient; the homogeneity of products is serious, and the functions are similar; capital heat is high, But the user recognition is not high; even the practical value of some products is not high.

Contents of the invention

In view of the above problems, the present invention provides an intelligent switch, which has the functions of electronic clock, state switching, turning on and off of household lamps with regular work and rest, ringing a bell, turning on and off of temperature-controlled air conditioners or fans, and the like.

The present invention adopts the following technical solutions, an intelligent switch, including a clock circuit for time calculation, a digital tube display module for displaying time, a temperature acquisition module, a ringing circuit for temperature exceeding the limit, and a function The button module for selection and parameter input, the relay switch circuit for controlling electrical switches, and the reset circuit for system clearing and reset.

As a further improvement, the model of the single-chip microcomputer is AT89C51, which is compatible with the standard MCS-51 command system and 80C51 pin structure, and integrates a general-purpose 8-bit central processing unit and an ISP Flash storage unit in the chip.

As a further improvement, the key circuit is a key switch connected to the I/O port of the single-chip microcomputer, including a key for setting the timing mode of the switch light, a key for setting the timing of turning on the light, a key for setting the timing of turning off the light, and a key for setting the temperature. Lower limit mode selection button, set temperature upper limit button, set temperature lower limit button, manned/unattended state mode selection button and reset button.

As a further improvement, the clock circuit is an oscillating circuit comprising a crystal oscillator and two capacitors, and the two capacitors are respectively connected in parallel to the two terminals connecting the crystal oscillator and the single-chip computer; the clock circuit is controlled by the single-chip computer. The output shows the time.

As a further improvement, the digital tube display module can also output and display temperature, and the temperature information collected by the temperature acquisition module is received by the single-chip microcomputer to control the output temperature of the digital tube display module.

As a further improvement, the said nixie tube display module is connected with the single-chip microcomputer through a dynamic display interface.

As a further improvement, the temperature acquisition circuit uses a DS18B20 digital sensor, and its I/O interface is connected to the I/O interface of the single-chip microcomputer with a data line.

As a further improvement, the relay switch circuit includes a temperature relay and a time relay, the temperature relay is controlled by the single-chip microcomputer according to the temperature condition set by the key module, and the time relay is controlled by the single-chip microcomputer according to the timing set by the key module Light switch.

As a further improvement, the reset circuit includes a capacitor, a grounding resistor, a series resistor and a reset button, and the series resistor is connected in series with the reset button and then connected in parallel with the capacitor.

As a further improvement, its control method steps are:

1), start the smart switch, the system is initially set to the unmanned state, the single-chip microcomputer and the clock circuit are started, the digital tube display module displays the time, and other circuits and modules are in a dormant state; press the button module "Manned/unmanned state setting "Function button, set to manned state, all circuits and modules start, temperature control and timing control;

2), temperature control: start the temperature acquisition module, collect the ambient temperature, and judge according to the temperature range input by the button module. The temperature relay is closed, and the air conditioner starts; when the ambient temperature is lower than the set temperature range, the single-chip microcomputer controls the temperature relay to be disconnected, and the air conditioner is turned off;

3) Timing control: The single-chip microcomputer detects the timing setting of the button module input, and when the set opening time is reached, the single-chip output controls the time relay of the relay switch circuit to close, and the light source is turned on; when the light source timing reaches the set closing time, the single-chip microcomputer controls the time The relay opens and the light source turns off.

The present invention not only solves the problem of furniture intelligent control, but also has the following beneficial effects: the present invention adopts the control of a single-chip microcomputer, does not have complicated control circuits, takes up little space, has quick response, simple operation, and fast switching; it has electronic clock, state switching, work and rest Timed on and off of home lights, ringing when temperature exceeds the limit, start and close of temperature-controlled air conditioners and fans, etc.; according to the set occupant/unoccupied state, some modules are selectively turned on or off to implement multi-function and Switch between low power consumption, more power saving.

Description of drawings

Fig. 1 is the structural block diagram of intelligent switch of the present invention;

Fig. 2 is the pin arrangement diagram of AT89C51 single-chip microcomputer of the embodiment of the present invention;

Fig. 3 is the circuit schematic diagram of the clock circuit of the embodiment of the present invention;

Fig. 4 is the circuit schematic diagram of the temperature acquisition module of the embodiment of the present invention;

Fig. 5 is the schematic circuit diagram of the nixie tube display module of the embodiment of the present invention;

Fig. 6 is the circuit schematic diagram of the relay switch circuit of the embodiment of the present invention;

Fig. 7 is the circuit schematic diagram of the bell circuit of the embodiment of the present invention;

FIG. 8 is a schematic circuit diagram of a reset circuit according to an embodiment of the present invention;

Fig. 9 is a flowchart of a control method according to an embodiment of the present invention.

detailed description

In order to make the purpose, technical solutions and points of the embodiments of the present invention clearer, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only preferred embodiments of the present invention, not all Examples should not be used to limit the scope of rights of the present invention.

As shown in Figure 1, an intelligent switch includes a clock circuit for time calculation, a digital tube display module for displaying time, a temperature acquisition module, a ringing circuit for temperature exceeding the limit, and a function selection The button module for inputting parameters, the relay switch circuit for controlling electrical switches, and the reset circuit for system clearing and reset.

Fig. 2 is the pin arrangement diagram of the AT89C51 single-chip microcomputer of the embodiment, AT89C51 is a low power consumption, high-performance CMOS 8-bit single-chip microcomputer, the Flash read-only that can be repeatedly erased and written 1000 times including 4k Bytes ISP (In-system programmable) in the chip Program memory, the device is manufactured using ATMEL's high-density, non-volatile storage technology, compatible with the standard MCS-51 command system and 80C51 pin structure, integrated in the chip with a general-purpose 8-bit central processing unit and ISP Flash storage unit, powerful The AT89C51 microcomputer can provide a cost-effective solution for many embedded control application systems.

As shown in Figure 3, the clock circuit is a clock oscillation circuit, including two capacitors and a crystal oscillator X1. The two capacitors C1 and C2 are respectively connected in parallel to the two terminals XT1 and XT2 of the crystal oscillator. XT1 is connected to the 19 pins (XTAL1) and XT2 of the AT89C51 microcontroller. Connect the 18-pin (XTAL2) of the AT89C51 microcontroller; the crystal oscillator X1 is 12MHz, and the two capacitors are 30pF. The clock circuit can realize accurate control of circuit time and provide time reference for AT89S51 single-chip microcomputer.

As shown in Figure 4, the temperature acquisition module uses a digital temperature sensor DS18B20 for temperature acquisition. The circuit connection is simple. The VDD interface of the DS18B20 temperature sensor is externally connected to the VCC voltage source, and its I/O interface is connected to the pin P2.4 of the AT89S51 microcontroller through a data line. , the VDD interface and the data line are also connected in series with a resistor R3, the resistance of R3 is 4.7KΩ, and the GND interface is grounded.

Figure 5 is the digital tube display module, which uses a single-chip microcomputer to connect with the dynamic display interface of the digital tube to display time, and displays the digital time through the input of the segment code of the digital tube. The digital tube display module can also be used to display temperature, and the temperature information collected by the temperature acquisition module is received by the single-chip microcomputer to control the digital tube display module to output and display the temperature. Among them, the four NOT gates dynamically displayed by the digital tube are respectively connected to pins 5, 6, 7, and 8 (P1.4, P1.5, P1.6, P1.7) of the microcontroller, and the 8 segments of the digital tube (dp, g , f, e, d, c, b, a) and 28 ~ 21 pins (P2.7 ~ P2.0) of the microcontroller respectively. It can be seen that the 8 segments of the 4-digit digital tube are jointly controlled by the single-chip microcomputer P2.7~P2.0, and the COM bit of the common port of each digital tube is strobed by P1 port P1.4, P1.5, P1.6, P1. 7 is controlled by the NOT gate SN74LS04N. Which potential of the common terminal (C4~C1) changes from 0 to 1, and the corresponding digital tube runs. When the potential of P2.7~P2.0 is 1, the corresponding 8-segment digital tube lights up, displaying 0~9). If the single-chip I/O adopts a static driving method to drive a digital tube, an 8-bit I/O port is required. Although this driving method is simple and has high brightness, it consumes power and wastes I/O port resources. When it is necessary to drive more than 4 digital tubes, it is necessary to expand the I/O port or add a decoding driver for driving, and the hardware circuit design is complex and resource-consuming. Although the dynamic display interface mode takes up CPU time, it saves hardware and the interface circuit is simple.

Fig. 6 is the circuit schematic diagram of the relay switch circuit in the embodiment, the relay switch circuit includes a temperature relay and a time relay, the relay is a kind of electrical control device, when the change of the input quantity reaches the specified requirement, in the electrical output circuit An electrical appliance that causes a predetermined step change in the controlled quantity is actually an "automatic switch" that uses a small current to control a large current operation. The resistance R1 end of the relay circuit is connected to pin 2 (P1.1) of the single-chip microcomputer, and a PNP type triode amplifier circuit is used. The current at both ends of the coil is provided by the triode. On, the coil has current, and the relay pulls in. When the high level is sent, the triode is cut off, the coil has no current, and the relay is disconnected. The function of the diode is that when the coil generates a strong counter electromotive force at the moment of power failure, it can be consumed with it, so that it is not easy to burn out the triode. The output end of the relay is equivalent to a single-pole double-throw switch, and the moving contact is grounded. When the switch is connected to the left static contact, the circuit is connected. When the temperature sensor detects that the ambient temperature reaches the set value, the temperature relay is closed or disconnected through the output of the single-chip microcomputer, thereby controlling the regular operation of the air conditioner. The control of the LED lights uses a time relay. The time relay is a kind of relay that closes or disconnects the controlled circuit when the output part needs to be delayed or limited to the specified time when the input signal is added or removed. When the single-chip microcomputer detects the timing of turning on or off the light, the output of the single-chip microcomputer makes the time relay close or open, causing the light to turn on and off.

The schematic diagram of the ringing circuit is shown in Figure 7. The input of the circuit is connected to pin 1 (P1.0) of the single-chip microcomputer. The ringing circuit uses a buzzer FM and has its own oscillation circuit inside, which can be controlled by the output and input of the single-chip microcomputer. Level drive, the input is amplified and input to the buzzer FM through the amplifier Q1 connected in series with the resistor R18, and the buzzer FM is externally connected with the input voltage VCC. When the AT89S51 single-chip microcomputer detects that the temperature collected by the temperature acquisition module exceeds the set temperature, the single-chip microcomputer will output a level to drive the ringing circuit to ring the bell.

As shown in Figure 8, the reset circuit is connected to 9 pins (RST) of the AT89S51 microcontroller, including capacitor C18, grounding resistor R25, series resistor R24 and reset button K19, and the series resistor is connected in parallel with the capacitor after being connected in series with the reset button, wherein R24 is 100Ω, R25 is 10KΩ, and C18 is 100nF. The reset button is set on the button module, and the reset button can be pressed to complete the system reset.

The intelligent switch control system of the invention can realize intelligent control of household appliances. In a preferred embodiment, the intelligent switch uses the temperature relay and the time relay to respectively perform temperature control switch and timing switch of the LED light on the air conditioner. The control method of the control system is shown in Figure 9:

1), start the smart switch, the system is initially set to the unmanned state, the single-chip microcomputer and the clock circuit are started, the digital tube display module displays the time, and other circuits and modules are in a dormant state; press the button module "Manned/unmanned state setting "Function button, set to manned state, all circuits and modules start, temperature control and timing control;

2), temperature control: the temperature acquisition module starts to collect the ambient temperature. When the temperature is higher than the set temperature range, the single-chip microcomputer controls the ringing circuit to start ringing once, and at the same time controls the temperature relay of the relay switch circuit to close, and the air conditioner starts; when the environment When the temperature is lower than the set temperature range, the single-chip microcomputer controls the temperature relay to disconnect, and the air conditioner is turned off;

3) Timing control: The single-chip microcomputer detects the timing setting of the button module input, and when the set opening time is reached, the single-chip output controls the time relay of the relay switch circuit to close, and the light source is turned on; when the light source timing reaches the set closing time, the single-chip microcomputer controls the time The relay opens and the light source turns off.

The limit of time and temperature is all pre-set by the key module, and the key circuit is that the key switch is connected with the I/O port of the single-chip microcomputer, including (1) setting the switch light timing mode selection key, the key and the 39 pins of the single-chip microcomputer (P0.0) connection; (2) Set the timing button for turning on the light, which is connected to the 38-pin (P0.1) of the single-chip microcomputer; (3) Set the timing button for turning off the light, and the button is connected to the 37-pin (P0.2) of the single-chip microcomputer ) connection; (4) set the temperature upper and lower limit mode selection button, the button is connected with the 36-pin (P0.3) of the single-chip microcomputer; (5) set the temperature upper limit button, and the button is connected with the 35-pin (P0.4) of the single-chip microcomputer; (6) set the temperature lower limit button, the button is connected with the 34-pin (P0.5) of the single-chip microcomputer; (7) the selection button of the presence/absence state mode, the button is connected with the 33-pin (P0.6) of the single-chip microcomputer; (8 ) reset, and the button is connected to pin 9 (RST) of the microcontroller.

The invention adopts a single-chip microcomputer as a control module, has a simple circuit structure, more efficient control, takes up less space, can realize temperature control and timing switch, can realize multi-function and low power consumption state switching, and saves more power.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, and any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be Included within the protection scope of the present invention.

Claims (10)

1. a kind of intelligent switch, it is characterised in that including respectively with monolithic mechatronics for Time Calculation clock circuit, For showing that numeral method module, temperature collect module, the bell circuit of temperature over-range, the function of time select defeated with parameter Key-press module, the relay switch circuit of control apparatus switch and the system entered resets the reset circuit resetted.

2. a kind of intelligent switch according to claim 1, it is characterised in that the model AT89C51 of described single-chip microcomputer, General 8 central processing units and ISP are integrated with compatibility standard MCS-51 instruction systems and 80C51 pin configurations, chip Flash memory cell.

3. a kind of intelligent switch according to claim 1, it is characterised in that described key circuit is key switch and list The connection of I/O mouthfuls of piece machine, including configuration switch lamp timing mode selection key, setting turn on light regularly button, setting turn off the light timing by Key, design temperature bound mode selection button, design temperature upper limit button, design temperature lower limit button, someone/unmanned state Mode selection button and reset key.

4. a kind of intelligent switch according to claim 1, it is characterised in that described clock circuit is to include a crystal oscillator With the oscillating circuit of two electric capacity compositions, two described electric capacity are connected in parallel on two terminals that crystal oscillator is connected with single-chip microcomputer respectively； Clock circuit controls the numeral method module output display time by single-chip microcomputer.

5. a kind of intelligent switch according to claim 4, it is characterised in that numeral method module can also output display temperature Degree, the temperature information for receiving temperature collect module collection by single-chip microcomputer controls numeral method module to export.

6. a kind of intelligent switch according to claim 1, it is characterised in that described numeral method module and single-chip microcomputer Connected using Dynamic Announce interface.

7. a kind of intelligent switch according to claim 1, it is characterised in that described temperature collection circuit is used DS18B20 digital transducers, its I/O interfaces data wire is connected with single-chip processor i/o interface.

8. a kind of intelligent switch according to claim 1, it is characterised in that described relay switch circuit include temperature after Electrical equipment and the time relay, the temperature conditionss control air-conditioning that described temperature relay is set by single-chip microcomputer according to key-press module are opened Close, the timing controlled lamp source that the time relay is set by single-chip microcomputer according to key-press module is switched.

9. a kind of intelligent switch according to claim 1, it is characterised in that described reset circuit includes electric capacity, ground connection Resistance, series resistance and reset key, described series resistance are in parallel with electric capacity after being connected with reset key.

10. a kind of intelligent switch according to claim any one of 1-9, it is characterised in that the controlling party of the intelligent switch Method step is：

1) intelligent switch, is started, system is initially set to unmanned state, and single-chip microcomputer and clock circuit start, numeral method mould Block shows the time, and other circuits and module are in a dormant state；Push button " someone/nobody state setting " function of module Button, is set as someone's state, and all circuits and module start, and carry out temperature control and timing controlled；

2), temperature control：Temperature collect module starts, and gathers environment temperature, and the temperature range inputted according to key-press module judges, When temperature is higher than design temperature scope, single-chip microcomputer control bell circuit starts jingle bell once, while controlling relay switch circuit Temperature relay is closed, starting of air conditioner；When environment temperature is less than design temperature scope, single-chip microcomputer control temperature relay breaks Open, air-conditioning is closed；

3), timing controlled：The time set of monolithic machine testing key-press module input, reaches setting opening time, single-chip microcomputer output The time relay closure of relay switch circuit is controlled, lamp source is opened；When lamp source timing reaches the setting shut-in time, single-chip microcomputer control The time relay processed is disconnected, and lamp source is closed.