CN111123881A - High-precision household electrical appliance control system - Google Patents
High-precision household electrical appliance control system Download PDFInfo
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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
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS], computer integrated manufacturing [CIM]
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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
- G05B15/00—Systems controlled by a computer
- G05B15/02—Systems controlled by a computer electric
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
- G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
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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
- G05B2219/26—Pc applications
- G05B2219/2642—Domotique, domestic, home control, automation, smart house
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention provides a high-precision household appliance control system which comprises a display unit, a storage unit, a control unit, a dust detection unit, a signal processing unit, an embedded controller, a power supply unit, a temperature sensor, a humidity sensor, a WiFi unit and a remote monitoring end, wherein the dust detection unit comprises a light source and a light intensity sensor, the light source is arranged on the ground in a house, the light source emits light signals, the light intensity sensor is arranged on the ceiling in the house and used for receiving the light intensity emitted by the light source, the light intensity sensor converts the received light intensity into electric signals, the light intensity sensor transmits the electric signals to the signal processing unit, the signal processing unit can greatly improve the detection precision of the light intensity sensor, and then the control unit is used for carrying out high-precision control on indoor household appliances.
Description
Technical Field
The invention relates to the field of intelligent household appliances, in particular to a high-precision household appliance control system.
Background
Smart homes originated in the united states. In 1984, the reconstruction of the United states of America 'urban office building' was completed, marking the formation of the first recognized 'intelligent building' in the world. At first, the UTBS of the project contractor realizes the monitoring and control of the lighting, elevator, air conditioner and other devices of a building by connecting the computer with the communication device in the building, and simultaneously provides the information service functions of voice call, e-mail and the like. Later, countries such as europe and singapore successively put forward own intelligent home solutions.
At present, the intelligent home development of developed countries in foreign countries is relatively mature compared with that of China, a system standard suitable for the country is gradually formed, and with the Korea and the capital adjacent to China, a mature intelligent home ecological circle is gradually formed by means of the high-speed development of scientific technology, all home products are respectively owned by their own functions and work in cooperation with each other, the home owner needs to be managed together, the intelligent home industry in Japan is relatively developed, the automatic networking of home appliances is widely realized at present, and an automatic door identification system is realized by means of a biological authentication technology. In addition, the smart home devices of the notebook are almost non-porous. For example, some families install an intelligent sphygmomanometer on a toilet seat, and the intelligent device can automatically detect the blood pressure and the blood sugar value of a user and display the blood pressure and the blood sugar value of all the families on a special display screen. Korea divides the functions of the smart home system more carefully and more normatively. Korean credit 4A describes their digital home system (HDS) AnyDevice, anytime, anywhere, anyservice, in the sense that the system allows a user to operate Any device in the home and enjoy Any Service anywhere and at Any Time. For example, some smart home systems set the refrigerator to be always in an on state and connect the refrigerator to the network, and meanwhile, use the refrigerator as a control center of the smart system. The intelligent refrigerator can provide delicious recipes and realize the functions of surfing the internet and watching television; the home health examination system installed in the bedroom can monitor the body temperature, pulse, breath and other symptoms of the user at any time, so that a doctor can monitor the health condition of the user in time. And the patient and the doctor can consult face to face by networking the television in the bedroom.
In China, the smart home is not an independent product or system, is not an intelligent cell in the traditional sense, and is a multi-level home intelligent solution based on the cell. Compared with foreign countries, the development of the intelligent home industry in China is lagged, and the development of the intelligent home industry in China successively goes through a concept year, a research and development year, an experiment year, a popularization year and a popularization year, so that the real intelligent home network large market in China cannot be formed until 2007.
With the development of economy and the progress of science and technology, various household appliances in the household life of people are increasingly abundant. The various household appliances are independent from each other, and the control modes are different, so that the unified management and control of the user are inconvenient. The single household appliance service can not meet the requirements of users slowly, and the realization of unified management and remote control of various household appliances is a future development trend. The traditional remote household appliance control system mostly uses a PC as a control terminal, and the networking mode mostly adopts a wired mode, so that the system has the defects of high power consumption, wiring requirement, inconvenient movement of the control terminal and the like.
Disclosure of Invention
Therefore, in order to overcome the above problems, the present invention provides a high precision household electrical appliance control system, which comprises a display unit, a storage unit, a control unit, a dust detection unit, a signal processing unit, an embedded controller, a power supply unit, a temperature sensor, a humidity sensor, a WiFi unit and a remote monitoring terminal, wherein the dust detection unit comprises a light source and a light intensity sensor, the light source is arranged on the ground in a home, the light source emits a light signal, the light intensity sensor is arranged on the ceiling in the home, the light intensity sensor is used for receiving the light intensity emitted by the light source, the light intensity sensor converts the received light intensity into an electrical signal, the light intensity sensor transmits the electrical signal to the signal processing unit, the signal processing unit can greatly improve the detection precision of the light intensity sensor, and then the control unit is used for.
The invention provides a high-precision household appliance control system which comprises a display unit, a storage unit, a control unit, a dust detection unit, a signal processing unit, an embedded controller, a power supply unit, a temperature sensor, a humidity sensor, a WiFi unit and a remote monitoring end.
Wherein, the dust detecting element is used for gathering the interior dust signal of house, the output of dust detecting element is connected with signal processing unit's input, signal processing unit's output is connected with embedded controller's input, temperature sensor is used for gathering the interior temperature signal of house, temperature sensor's output is connected with embedded controller's input, humidity transducer is used for gathering the interior humidity signal of house, humidity transducer's output is connected with embedded controller's input, embedded controller passes through the wiFi unit and is connected with the remote monitoring end, power supply unit provides electric power support for embedded controller and wiFi unit, the input of display element, the input of storage unit and the input of control unit all are connected with embedded controller's output.
Preferably, the dust detection unit is used for collecting a dust signal in a house, an output end of the dust detection unit is connected with an input end of the signal processing unit, the signal processing unit is used for processing the received dust signal and then transmitting the processed dust signal to the embedded controller, a dust threshold signal is stored in the embedded controller, the embedded controller compares the received dust signal with the dust threshold signal, if the dust signal received by the embedded controller is greater than the dust threshold signal, the embedded controller sends a first trigger signal to the control unit, and the control unit receives the first trigger signal and then controls air dust removal equipment in the house to carry out indoor dust removal operation.
Preferably, the temperature sensor is used for collecting a temperature signal in a home, the temperature sensor transmits the collected temperature signal to the embedded controller, a temperature threshold signal is stored in the embedded controller, if the temperature signal received by the embedded controller is greater than the temperature threshold signal, the embedded controller sends a second trigger signal to the control unit, the control unit receives the second trigger signal and then controls the air conditioning equipment in the home to perform cooling operation until the temperature signal collected by the temperature sensor is equal to the temperature threshold signal, if the temperature signal received by the embedded controller is less than the temperature threshold signal, the embedded controller sends a third trigger signal to the control unit, and the control unit receives the third trigger signal and then controls the air conditioning equipment in the home to perform heating operation until the temperature signal collected by the temperature sensor is equal to the temperature threshold signal.
Preferably, the humidity sensor is used for collecting a humidity signal in a home, the humidity sensor transmits the collected humidity signal to the embedded controller, a humidity threshold signal is stored in the embedded controller, if the humidity signal received by the embedded controller is greater than the humidity threshold signal, the embedded controller sends a fourth trigger signal to the control unit, the control unit receives the fourth trigger signal and then controls the dehumidification equipment in the home to perform dehumidification operation, until the humidity signal collected by the humidity sensor is equal to the humidity threshold signal, if the humidity signal received by the embedded controller is less than the humidity threshold signal, the embedded controller sends a fifth trigger signal to the control unit, and the control unit receives the fifth trigger signal and then controls the humidification equipment in the home to perform humidification operation until the humidity signal collected by the humidity sensor is equal to the humidity threshold signal.
Preferably, the embedded controller transmits the received temperature signal, the received humidity signal and the received dust signal to the display unit for displaying, transmits the received temperature signal, the received humidity signal and the received dust signal to the storage unit for storing, and transmits the received temperature signal, the received humidity signal and the received dust signal to the remote monitoring end through the WiFi unit.
Preferably, the power supply unit includes a commercial power 220VAC, a rectifying unit and a voltage converting unit, the commercial power 220VAC transmits 220VAC to the rectifying unit, the rectifying unit converts the received 220VAC into 5DC and then provides power support for the embedded controller, the rectifying unit transmits the converted 5DC to the voltage converting unit, and the voltage converting unit converts the received 5DC into 3.3DC and then provides power support for the WiFi unit.
Preferably, the dust detection unit includes a light source disposed on the ground in the home, and a light intensity sensor disposed on the ceiling in the home, the light intensity sensor being configured to receive light intensity emitted by the light source, the light intensity sensor converting the received light intensity into an electrical signal, the light intensity sensor transmitting the electrical signal to the signal processing unit.
Preferably, the light intensity sensor is used for receiving the light intensity emitted by the light source, the light intensity sensor converts the received light intensity into a voltage signal V0 and transmits the voltage signal V0 to the signal processing unit, V1 is the voltage signal processed by the signal processing unit, the signal processing unit comprises a signal amplifying unit and a signal filtering unit, the output end of the light intensity sensor is connected with the input end of the signal amplifying unit, the output end of the signal amplifying unit is connected with the input end of the signal filtering unit, and the output end of the signal filtering unit is connected with the input end of the embedded controller.
Preferably, the signal amplifying unit includes resistors R1-R9, capacitors C1-C2, and operational amplifiers a1-A3, wherein the resistor R9 is a sliding rheostat.
Wherein, the output end of the optical intensity sensor is connected with one end of a resistor R1, the other end of the resistor R1 is connected with the non-inverting input end of an operational amplifier A1, one end of a resistor R2 is connected with the inverting input end of an operational amplifier A1, one end of a resistor R2 is connected with one end of a capacitor C1, the other end of a resistor R2 is connected with the other end of a capacitor C1, the other end of a resistor R2 is connected with the output end of an operational amplifier A1, one end of a resistor R5 is connected with the output end of an operational amplifier A1, one end of a resistor R3 is grounded, the other end of a resistor R3 is connected with the non-inverting input end of an operational amplifier A2, one end of a resistor R4 is connected with the output end of an operational amplifier A2, the other end of a resistor R4 is connected with the inverting input end of an operational amplifier A2, one end of a capacitor C2 is connected with one end of a resistor R4, the other end of, the other end of the resistor R6 is connected with the non-inverting input end of the operational amplifier A3, the other end of the resistor R6 is further connected with one end of the resistor R8, the other end of the resistor R8 is grounded, the other end of the resistor R5 is connected with one end of the resistor R7, the other end of the resistor R5 is connected with the inverting input end of the operational amplifier A3, the other end of the resistor R7 is connected with the output end of the operational amplifier A3, one end of the resistor R9 is connected with the other end of the capacitor C2, the other end of the resistor R9 is connected with one end of the capacitor C1, and the output end of the operational amplifier A3 is connected with the.
Preferably, the signal filtering unit includes resistors R10-R12, capacitors C3-C5, and an operational amplifier A4.
The output end of the signal amplification unit is connected with one end of a resistor R10, one end of a capacitor C3 and a capacitor C4 which are connected in parallel is connected with the output end of an operational amplifier A4, the other end of a capacitor C3 and a capacitor C4 which are connected in parallel is connected with the other end of a resistor R10, one end of a capacitor C5 is grounded, the other end of a capacitor C5 is connected with the non-inverting input end of an operational amplifier A4, one end of a resistor R11 is connected with one end of a capacitor C3 and a capacitor C4 which are connected in parallel, the other end of a resistor R11 is connected with the other end of a capacitor C5, the inverting input end of an operational amplifier A4 is connected with the output end of the operational amplifier A4, one end of a resistor R12 is connected with the output end of the operational amplifier A4, the other end of the resistor R12 is connected with the input.
Preferably, the embedded controller is STM32F 107.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention provides a high-precision household appliance control system which comprises a display unit, a storage unit, a control unit, a dust detection unit, a signal processing unit, an embedded controller, a power supply unit, a temperature sensor, a humidity sensor, a WiFi unit and a remote monitoring end, wherein the dust detection unit comprises a light source and a light intensity sensor, the light source is arranged on the ground in a house, the light source emits light signals, the light intensity sensor is arranged on the ceiling in the house and used for receiving light intensity emitted by the light source, the light intensity sensor converts the received light intensity into electric signals, the light intensity sensor transmits the electric signals to the signal processing unit, the signal processing unit can greatly improve the detection precision of the light intensity sensor, and then the control unit is used for carrying out high-precision control on indoor household.
(2) The invention also discloses that the dust detection unit comprises a light source and a light intensity sensor, the light source is arranged on the ground in the house, the light source emits light signals, the light intensity sensor is arranged on the ceiling in the house, the light intensity sensor is used for receiving the light intensity emitted by the light source, the light intensity sensor converts the received light intensity into electric signals, and the light intensity sensor transmits the electric signals to the signal processing unit.
(3) The invention also discloses that the noise of the signal processing unit is within 1.25nV, the drift is 0.75 muV/DEG C, and the detection precision of the light intensity sensor is greatly improved.
Drawings
FIG. 1 is a schematic diagram of a high-precision appliance control system of the present invention;
FIG. 2 is a schematic view of a dust detection unit of the present invention;
fig. 3 is a circuit diagram of a signal processing unit of the present invention.
Detailed Description
The high-precision household electrical appliance control system of the invention is described in detail below with reference to the accompanying drawings and embodiments.
As shown in fig. 1, the high-precision household appliance control system provided by the invention comprises a display unit, a storage unit, a control unit, a dust detection unit, a signal processing unit, an embedded controller, a power supply unit, a temperature sensor, a humidity sensor, a WiFi unit and a remote monitoring end.
Wherein, the dust detecting element is used for gathering the interior dust signal of house, the output of dust detecting element is connected with signal processing unit's input, signal processing unit's output is connected with embedded controller's input, temperature sensor is used for gathering the interior temperature signal of house, temperature sensor's output is connected with embedded controller's input, humidity transducer is used for gathering the interior humidity signal of house, humidity transducer's output is connected with embedded controller's input, embedded controller passes through the wiFi unit and is connected with the remote monitoring end, power supply unit provides electric power support for embedded controller and wiFi unit, the input of display element, the input of storage unit and the input of control unit all are connected with embedded controller's output.
In the above embodiment, the dust detection unit is configured to collect a dust signal in a home, an output end of the dust detection unit is connected to an input end of the signal processing unit, the signal processing unit performs signal processing on the received dust signal and then transmits the processed dust signal to the embedded controller, a dust threshold signal is stored in the embedded controller, the embedded controller compares the received dust signal with the dust threshold signal, if the received dust signal received by the embedded controller is greater than the dust threshold signal, the embedded controller sends a first trigger signal to the control unit, and the control unit receives the first trigger signal and then controls the home air dust removal device to perform indoor dust removal operation.
The temperature sensor is used for collecting temperature signals in a home, the temperature sensor transmits the collected temperature signals to the embedded controller, temperature threshold signals are stored in the embedded controller, if the temperature signals received by the embedded controller are larger than the temperature threshold signals, the embedded controller sends second trigger signals to the control unit, the control unit receives the second trigger signals and then controls the air conditioning equipment in the home to carry out cooling operation until the temperature signals collected by the temperature sensor are equal to the temperature threshold signals, if the temperature signals received by the embedded controller are smaller than the temperature threshold signals, the embedded controller sends third trigger signals to the control unit, and the control unit receives the third trigger signals and then controls the air conditioning equipment in the home to carry out heating operation until the temperature signals collected by the temperature sensor are equal to the temperature threshold signals.
The humidity sensor is used for collecting humidity signals in a home, the humidity signals collected by the humidity sensor are transmitted to the embedded controller, a humidity threshold signal is stored in the embedded controller, if the humidity signals received by the embedded controller are larger than the humidity threshold signal, the embedded controller sends a fourth trigger signal to the control unit, the control unit receives the fourth trigger signal and then controls the dehumidification equipment in the home to perform dehumidification operation, until the humidity signals collected by the humidity sensor are equal to the humidity threshold signal, if the humidity signals received by the embedded controller are smaller than the humidity threshold signal, the embedded controller sends a fifth trigger signal to the control unit, the control unit receives the fifth trigger signal and then controls the humidification equipment in the home to perform humidification operation, and until the humidity signals collected by the humidity sensor are equal to the humidity threshold signal.
The embedded controller transmits the received temperature signal, the received humidity signal and the received dust signal to the display unit to be displayed, transmits the received temperature signal, the received humidity signal and the received dust signal to the storage unit to be stored, and transmits the received temperature signal, the received humidity signal and the received dust signal to the remote monitoring end through the WiFi unit.
Furthermore, the high-precision household appliance control system provided by the invention comprises a display unit, a storage unit, a control unit, a dust detection unit, a signal processing unit, an embedded controller, a power supply unit, a temperature sensor, a humidity sensor, a WiFi unit and a remote monitoring end, wherein the dust detection unit comprises a light source and a light intensity sensor, the light source is arranged on the ground in a house, the light source emits a light signal, the light intensity sensor is arranged on the ceiling in the house and used for receiving the light intensity emitted by the light source, the light intensity sensor converts the received light intensity into an electric signal, the light intensity sensor transmits the electric signal to the signal processing unit, the signal processing unit can greatly improve the detection precision of the light intensity sensor, and then the control unit is used for carrying out high-precision control on.
Furthermore, the output signals of the light intensity sensor, the temperature sensor and the humidity sensor are all voltage signals, and meanwhile, the dust signal threshold, the temperature signal threshold and the humidity signal threshold are all voltage signals, so that the output signals of the light intensity sensor, the temperature sensor and the humidity sensor do not need to be converted into a dust concentration value, a temperature value and a humidity value, and the running speed of the high-precision household electrical control system is improved.
As shown in fig. 1, the power supply unit includes a commercial power 220VAC, a rectifying unit, and a voltage converting unit, where the commercial power 220VAC transmits 220VAC to the rectifying unit, the rectifying unit converts the received 220VAC into 5DC and then provides power support for the embedded controller, the rectifying unit transmits the converted 5DC to the voltage converting unit, and the voltage converting unit converts the received 5DC into 3.3DC and then provides power support for the WiFi unit.
As shown in fig. 2, the dust detection unit includes a light source and a light intensity sensor, the light source is disposed on the ground in the house, the light source emits a light signal, the light intensity sensor is disposed on the ceiling in the house, the light intensity sensor is used for receiving the light intensity emitted by the light source, the light intensity sensor converts the received light intensity into an electric signal, and the light intensity sensor transmits the electric signal to the signal processing unit.
At present, dust detectors which are put into use are mainly divided into two types, namely a microcomputer laser type detector and an alternating current electrostatic induction type detector. Dust meters based on tribostatic technology use a probe inserted into the flue gas duct, which measures the change in the charge carried by the particles and records the relevant data. They can only measure dust that is colliding or very close to the probe. Dust meters based on the opacity technique measure particle density mainly by means of light transmission and use a narrow beam of light through the flue gas duct to measure the value of light absorption. The dust measuring instrument based on the light scattering technology measures the content of the particles by using the flash frequency reflected by the particles and the duration of the process, and has the greatest advantage that errors caused by humidity and other factors can be greatly reduced. The dust measuring instrument based on the light absorption technology utilizes the principle that when light waves pass through a linear substance, the light waves interact with the substance, one part of the light waves is absorbed by a medium, the other part of the light waves is scattered by the medium, and the rest part of the light waves keeps the original propagation direction and passes through the medium. The measuring instrument calculates the dust concentration by measuring the energy intensity of incident light and the energy intensity of emergent light, and has the greatest advantage that an accurate measuring result can be ensured when the dust concentration is higher.
The dust detection unit provided by the invention comprises a light source and a light intensity sensor, wherein the light source is arranged on the ground in a home, the light source emits a light signal, the light intensity sensor is arranged on the ceiling in the home, the light intensity sensor is used for receiving the light intensity emitted by the light source, and the light intensity sensor converts the received light intensity into an electric signal.
As shown in fig. 3, the light intensity sensor is used for receiving the light intensity emitted by the light source, the light intensity sensor converts the received light intensity into a voltage signal V0, and transmits the voltage signal V0 to the signal processing unit, V1 is the voltage signal processed by the signal processing unit, the signal processing unit includes a signal amplifying unit and a signal filtering unit, the output end of the light intensity sensor is connected with the input end of the signal amplifying unit, the output end of the signal amplifying unit is connected with the input end of the signal filtering unit, and the output end of the signal filtering unit is connected with the input end of the embedded controller.
Specifically, the signal amplification unit comprises resistors R1-R9, capacitors C1-C2 and operational amplifiers A1-A3, wherein the resistor R9 is a sliding rheostat.
Wherein, the output end of the optical intensity sensor is connected with one end of a resistor R1, the other end of the resistor R1 is connected with the non-inverting input end of an operational amplifier A1, one end of a resistor R2 is connected with the inverting input end of an operational amplifier A1, one end of a resistor R2 is connected with one end of a capacitor C1, the other end of a resistor R2 is connected with the other end of a capacitor C1, the other end of a resistor R2 is connected with the output end of an operational amplifier A1, one end of a resistor R5 is connected with the output end of an operational amplifier A1, one end of a resistor R3 is grounded, the other end of a resistor R3 is connected with the non-inverting input end of an operational amplifier A2, one end of a resistor R4 is connected with the output end of an operational amplifier A2, the other end of a resistor R4 is connected with the inverting input end of an operational amplifier A2, one end of a capacitor C2 is connected with one end of a resistor R4, the other end of, the other end of the resistor R6 is connected with the non-inverting input end of the operational amplifier A3, the other end of the resistor R6 is further connected with one end of the resistor R8, the other end of the resistor R8 is grounded, the other end of the resistor R5 is connected with one end of the resistor R7, the other end of the resistor R5 is connected with the inverting input end of the operational amplifier A3, the other end of the resistor R7 is connected with the output end of the operational amplifier A3, one end of the resistor R9 is connected with the other end of the capacitor C2, the other end of the resistor R9 is connected with one end of the capacitor C1, and the output end of the operational amplifier A3 is connected with the.
Specifically, the signal filtering unit comprises resistors R10-R12, capacitors C3-C5 and an operational amplifier A4.
The output end of the signal amplification unit is connected with one end of a resistor R10, one end of a capacitor C3 and a capacitor C4 which are connected in parallel is connected with the output end of an operational amplifier A4, the other end of a capacitor C3 and a capacitor C4 which are connected in parallel is connected with the other end of a resistor R10, one end of a capacitor C5 is grounded, the other end of a capacitor C5 is connected with the non-inverting input end of an operational amplifier A4, one end of a resistor R11 is connected with one end of a capacitor C3 and a capacitor C4 which are connected in parallel, the other end of a resistor R11 is connected with the other end of a capacitor C5, the inverting input end of an operational amplifier A4 is connected with the output end of the operational amplifier A4, one end of a resistor R12 is connected with the output end of the operational amplifier A4, the other end of the resistor R12 is connected with the input.
In the foregoing embodiment, in the signal amplifying unit, the resistance of the resistor R1 is 150k ohms, the resistance of the resistor R2 is 150k ohms, the resistance of the resistor R3 is 150k ohms, the resistance of the resistor R4 is 150k ohms, the resistance of the resistor R5 is 20k ohms, the resistance of the resistor R6 is 20k ohms, the resistance of the resistor R7 is 300k ohms, the resistance of the resistor R8 is 300k ohms, the full-stroke resistance of the resistor R9 is 104 ohms, the capacitance of the capacitor C1 is 5p normal, the capacitance of the capacitor C2 is 5p normal, and all the models of the operational amplifiers a1-A3 are 37 OP 37G.
Furthermore, since the signal detected by the sensor is weak and the frequency is high (about 200 kHz), the signal amplification unit provided by the present invention is required to have high input impedance, high common mode rejection ratio, good symmetry, and a sufficiently wide frequency band, and an amplification circuit is configured by using three operational amplifiers.
As can be seen from the circuit diagram, the circuit of the signal amplification unit provided by the invention keeps perfect symmetry from the input stage to the output stage, and the gain is as follows:
the gain of the signal amplification unit can be changed by adjusting the slide rheostat R9 without influencing the symmetry of the signal amplification unit circuit, and the common mode rejection ratio CMRR of the current is determined by the CMRR of the operational amplifier A2 and the precision of R7/R5= R8/R6, so that the resistors R5-R7 all adopt precision resistors in specific application so as to ensure that the amplification circuit has higher CMRR.
Because the signal frequency of the sensor is about 200kHz, the frequency is higher for the operational amplifier in the prior art, and the amplification effect on weak signals is ensured, the bandwidth gain product of the signal amplification unit is not less than 10MHz, and the high-frequency operational amplifier OP37G is selected in the signal amplification unit, and the bandwidth gain product is 63 MHz. The invention also provides a signal amplifying unit, which is characterized in that a 5pF capacitor is respectively connected in parallel to the resistor R2 and the resistor R4 by adopting lead compensation, so that a zero point is added at the loop gain curve fz, wherein,
in the signal filtering unit, the resistance of the resistor R10 is 36k ohms, the resistance of the resistor R11 is 36k ohms, the resistance of the resistor R12 is 1k ohms, the capacitance of the capacitor C3 is 0.1 μ farad, the capacitance of the capacitor C4 is 0.1 μ farad, the capacitance of the capacitor C5 is 0.1 μ farad, and the signal of the operational amplifier a4 is OPA 277.
The signal filtering unit is a low-pass filter and can filter noise signals with the frequency of about 50Hz, and the transfer function of the signal filtering unit is as follows:
the cut-off frequency fc of the signal filtering unit is:
the quality factor Q of the signal filtering unit is:
the noise of the signal processing circuit provided by the invention is within 1.25nV, and the drift is 0.75 muV/DEG C.
Specifically, the embedded controller is STM32F 107.
The high-precision household electrical appliance control system provided by the invention is communicated with the main control chip STM32F107 through an SPI bus.
The SPI (synchronous serial interface technology) allows the microcontroller, such as the MCU or the ARM, to perform data interaction with various peripherals in a full-duplex synchronous serial manner. In actual design, 5 pins (wherein 4 pins are connected with the SPI controller, and the other pin is used as an interrupt input line) are distributed on the main control chip STM32F107, so that control and data transmission of synchronous serial communication between the chip and the main control chip STM32F107 can be realized, the occupation of chip pins is saved, and the space is saved for PCB layout.
In specific operation, the main program first performs initialization processing of the system, including pin port initialization, SPI initialization, timer setting, and the like of the STM32F107 chip. The EnterMode variable flag is set to wait for configuration, when the EnterMode variable is 1, smartconfig configuration process can be started, and when the EnterMode variable is 0, the waiting is continued. The CC3000Connected variable is used for judging whether the smartconfig network configuration process is finished, if the variable is 1, the smartconfig process is finished, the CC3000 equipment is Connected to the wireless network, and the data transmission process is started after the configuration process is finished. Meanwhile, after the configuration process is finished, the variable CC3000Connected is set to 0 and stored in the EEPROM, so that the configuration process is performed only once. If reconfiguration is required, the variable CC3000Connected may be set to 1 in the configuration wait state.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (10)
1. The utility model provides a high accuracy household electrical appliances control system which characterized in that, high accuracy household electrical appliances control system includes display element, memory cell, the control unit, dust detecting element, signal processing unit, embedded controller, power supply unit, temperature sensor, humidity transducer, wiFi unit and remote monitoring end.
2. The high-precision household appliance control system according to claim 1, wherein the dust detection unit is used for collecting household dust signals, the dust detection unit is connected with the signal processing unit, the signal processing unit is connected with the embedded controller, the temperature sensor is used for collecting household temperature signals, the temperature sensor is connected with the embedded controller, the humidity sensor is used for collecting household humidity signals, the humidity sensor is connected with the embedded controller, the embedded controller is connected with the remote monitoring end through the WiFi unit, the input end of the display unit, the input end of the storage unit and the control unit are connected with the embedded controller.
3. The high-precision household appliance control system according to claim 2, wherein the signal processing unit performs signal processing on the received dust signal and transmits the processed dust signal to the embedded controller, a dust threshold signal is stored in the embedded controller, the embedded controller compares the received dust signal with the dust threshold signal, if the dust signal received by the embedded controller is greater than the dust threshold signal, the embedded controller sends a first trigger signal to the control unit, and the control unit receives the first trigger signal and then controls household air dust removal equipment to perform indoor dust removal operation.
4. The high-precision household electrical appliance control system according to claim 2, wherein the temperature sensor transmits the collected temperature signal to the embedded controller, a temperature threshold signal is stored in the embedded controller, if the temperature signal received by the embedded controller is greater than the temperature threshold signal, the embedded controller sends a second trigger signal to the control unit, the control unit receives the second trigger signal and then controls the household air conditioner to perform cooling operation until the temperature signal collected by the temperature sensor is equal to the temperature threshold signal, if the temperature signal received by the embedded controller is less than the temperature threshold signal, the embedded controller sends a third trigger signal to the control unit, and the control unit receives the third trigger signal and then controls the household air conditioner to perform heating operation, until the temperature signal collected by the temperature sensor is equal to the temperature threshold signal.
5. The high-precision household appliance control system according to claim 2, wherein the humidity sensor is used for collecting a humidity signal in a household, the humidity sensor transmits the collected humidity signal to the embedded controller, a humidity threshold signal is stored in the embedded controller, if the humidity signal received by the embedded controller is greater than the humidity threshold signal, the embedded controller sends a fourth trigger signal to the control unit, the control unit receives the fourth trigger signal and then controls the household dehumidifying device to perform dehumidifying operation until the humidity signal collected by the humidity sensor is equal to the humidity threshold signal, if the humidity signal received by the embedded controller is less than the humidity threshold signal, the embedded controller sends a fifth trigger signal to the control unit, and the control unit receives the fifth trigger signal and then controls the household humidifying device to perform humidifying operation, until the humidity signal collected by the humidity sensor is equal to a humidity threshold signal; embedding controller with received temperature signal, humidity signal and dust signal transmission extremely the display element shows, embedding controller with received temperature signal, humidity signal and dust signal transmission extremely the memory cell saves, embedding controller passes through received temperature signal, humidity signal and dust signal wiFi unit transmission extremely remote monitoring end.
6. The system of claim 1, wherein the power unit comprises a commercial power 220VAC, a rectifying unit and a voltage converting unit, wherein the commercial power 220VAC transmits 220VAC to the rectifying unit, the rectifying unit converts the received 220VAC into 5DC and then provides power support for the embedded controller, the rectifying unit transmits the converted 5DC to the voltage converting unit, and the voltage converting unit converts the received 5DC into 3.3DC and then provides power support for the WiFi unit.
7. The high-precision household appliance control system according to claim 1 or 2, wherein the dust detection unit comprises a light source and a light intensity sensor, the light source is arranged on the ground in the house, the light source emits a light signal, the light intensity sensor is arranged on the ceiling in the house, the light intensity sensor is used for receiving the light intensity emitted by the light source, the light intensity sensor converts the received light intensity into an electric signal, and the light intensity sensor transmits the electric signal to the signal processing unit.
8. The high-precision household electrical appliance control system according to claim 7, wherein the light intensity sensor is configured to receive light intensity emitted by the light source, convert the received light intensity into a voltage signal V0, and transmit the voltage signal V0 to the signal processing unit, V1 is the voltage signal processed by the signal processing unit, the signal processing unit includes a signal amplification unit and a signal filtering unit, an output end of the light intensity sensor is connected to an input end of the signal amplification unit, an output end of the signal amplification unit is connected to an input end of the signal filtering unit, and an output end of the signal filtering unit is connected to an input end of the embedded controller.
9. The high-precision household electrical appliance control system according to claim 8, wherein the signal amplification unit comprises resistors R1-R9, capacitors C1-C2 and operational amplifiers a1-A3, and the resistor R9 is a slide rheostat; wherein, the output end of the light intensity sensor is connected with one end of a resistor R1, the other end of the resistor R1 is connected with the non-inverting input end of an operational amplifier A1, one end of a resistor R2 is connected with the inverting input end of the operational amplifier A1, one end of a resistor R2 is connected with one end of a capacitor C1, the other end of a resistor R2 is connected with the other end of a capacitor C1, the other end of a resistor R2 is connected with the output end of an operational amplifier A1, one end of a resistor R5 is connected with the output end of an operational amplifier A1, one end of a resistor R3 is grounded, the other end of a resistor R3 is connected with the non-inverting input end of an operational amplifier A2, one end of a resistor R4 is connected with the output end of an operational amplifier A2, the other end of a resistor R4 is connected with the inverting input end of an operational amplifier A2, one end of a capacitor C2 is connected with one end of a resistor R4, the other end of a, the other end of the resistor R6 is connected with the non-inverting input end of the operational amplifier A3, the other end of the resistor R6 is further connected with one end of the resistor R8, the other end of the resistor R8 is grounded, the other end of the resistor R5 is connected with one end of the resistor R7, the other end of the resistor R5 is connected with the inverting input end of the operational amplifier A3, the other end of the resistor R7 is connected with the output end of the operational amplifier A3, one end of the resistor R9 is connected with the other end of the capacitor C2, the other end of the resistor R9 is connected with one end of the capacitor C1, and the output end of the operational amplifier A3 is connected with the input.
10. The high-precision household electrical appliance control system according to claim 8, wherein the signal filtering unit comprises resistors R10-R12, capacitors C3-C5 and an operational amplifier a 4; the output end of the signal amplification unit is connected with one end of a resistor R10, one end of a capacitor C3 and a capacitor C4 which are connected in parallel is connected with the output end of an operational amplifier A4, the other end of a capacitor C3 and a capacitor C4 which are connected in parallel is connected with the other end of a resistor R10, one end of a capacitor C5 is grounded, the other end of a capacitor C5 is connected with the non-inverting input end of an operational amplifier A4, one end of a resistor R11 is connected with one end of a capacitor C3 and a capacitor C4 which are connected in parallel, the other end of a resistor R11 is connected with the other end of a capacitor C5, the inverting input end of an operational amplifier A3527 is connected with the output end of an operational amplifier A4, one end of a resistor R12 is connected with the output end of an operational amplifier A4, the other end of a resistor R12 is connected with the input end of the embedded.
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| CN207675600U (en) * | 2017-12-07 | 2018-07-31 | 华北科技学院 | A kind of intelligence high-precision dust sensor |
| CN109781190A (en) * | 2019-03-26 | 2019-05-21 | 南京梵科智能科技有限公司 | A kind of construction site environment comprehensive monitoring system |
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