CN212054276U

CN212054276U - Rainfall response smart window

Info

Publication number: CN212054276U
Application number: CN202020242790.5U
Authority: CN
Inventors: 杨童舒; 董青迅
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-03-03
Filing date: 2020-03-03
Publication date: 2020-12-01
Anticipated expiration: 2030-03-03

Abstract

The utility model provides a rainfall response smart window, is including installing glass's window frame and the actuating mechanism of drive window frame switch, still includes detecting system, detecting system still includes the control system who is connected with light emission end and light receiving terminal including installing light emission end and the light receiving terminal of interval on glass, control system includes the emission control ware, the steerable light emission end of emission control ware carries out periodic emission, control system still with actuating system control connection. Rainfall response smart window and control method adopts the optics principle, according to the strong and weak rainwater of judging on the window glass of received light what, judges the rainfall size, and the ventilation is taken into account when the angle that opens and shuts of automatic control window guarantees indoor rain-proof, takes care of user's many-sided demand, and market prospect is wide.

Description

Rainfall response smart window

Technical Field

The utility model belongs to building house field relates to an intelligent household equipment, concretely relates to rainfall response smart window.

Background

The intelligent house is the development trend of future life, has also appeared the smart window of rainwater response on the market, but nevertheless can not obtain user's favor all the time, and the reason has three points:

firstly, present smart window is not accurate enough to the response of rainfall, and most rainfall response all is fixed position installation rainwater sensor around the window, can not reflect the degree that the window is actually drenched by the rainwater, causes the mistake of window to open and shut.

Secondly, the current smart window has weak adjusting capacity, and basically adopts the method that the window is opened fully when no rain exists, the window is closed fully when sensing rain, and the window cannot be opened and closed at a proper angle according to the rainfall.

Thirdly, the current smart windows are basically sliding windows, but most families use more convenient and beautiful casement windows, so that the application of the smart windows is further limited.

SUMMERY OF THE UTILITY MODEL

For overcoming the defect that prior art exists, the utility model discloses a rainfall response smart window.

Rainfall response smart window, including the actuating mechanism who installs glass's window frame and drive window frame switch, still include detecting system, detecting system still includes the control system who is connected with light emission end and light receiving terminal including installing on glass and possessing the light emission end and the light receiving terminal of interval, control system includes the emission control ware, the steerable light emission end of emission control ware carries out periodic emission, control system still is connected with actuating system.

Preferably, the control system comprises a single chip microcomputer PC16F90, a driver CD4094 connected with the single chip microcomputer PC16F90 and an LED constant current circuit of which the input end is connected with the CD4094, the constant current circuit comprises an operational amplifier and a switching tube which are in negative feedback connection, and the switching tube is connected with an LED which is used as a light emitting end in series.

Preferably, the driving system is a telescopic rod arranged between the window frame and the window fixing surface and a motor driving the telescopic rod to stretch.

Preferably, the telescopic rod is provided with a pressure sensor.

Preferably, the light emitting end and the light receiving end are located on the same side of the glass.

Preferably, the incident angle of the light emitting end incident to the glass is 42 to 60 degrees.

Rainfall response smart window adopts the optics principle, according to receiving light strong and weak the judgement window glass on the rainwater how much, judges the rainfall size, and the automatic control window angle that opens and shuts compromises the ventilation when guaranteeing indoor rain-proof, looks after user's many-sided demand, market prospect is wide.

Drawings

Fig. 1 is a schematic view of a specific judgment process of the present invention;

FIG. 2 is a schematic diagram of total reflection of light rays inside the glass in the absence of rain;

FIG. 3 is a schematic view showing the total reflection and refraction of light rays inside and on the surface of a glass in the presence of rain;

FIG. 4 is a schematic diagram of an embodiment of a circuit portion of the control system of the present invention;

FIG. 5 is a schematic view of an embodiment of the external structure of the window according to the present invention;

fig. 6 is a schematic diagram of a specific flow chart of the present invention for implementing periodic transmission;

the name of the reference numbers in the figure is 1-glass, 2-light emitting end, 3-light receiving end, 4-raindrop, 5-telescopic rod, 6-motor, 7-control system, VCC-power voltage, R1-first resistor, R2-second resistor, R3-constant current circuit, Q-switch tube and D-light emitting diode.

Detailed Description

The following provides a more detailed description of the present invention.

Rainfall response smart window, including the actuating mechanism who installs glass 1's window frame and drive window frame switch, still include detecting system, detecting system still includes the control system who is connected with light emission end and light receiving terminal including installing on glass and possessing interval light emission end 2 and light receiving terminal 3, control system includes the emission control ware, the steerable light emission end of emission control ware carries out periodic emission, control system still with actuating system control is connected.

Wherein, light emission end can adopt luminous LED, and the light receiving terminal generally is photoelectric conversion diode, can turn into the signal of telecommunication with received light signal, photoelectric conversion diode front end still generally is provided with the wave filter, filters other light except that LED is luminous, only detects the light in the certain frequency range of light emission end transmission.

After the control system is installed, the system is adjusted to work in the best matching state by the circuit, and the signal value received by the receiving end in the initial state of no rain to the window glass is taken as a standard value, and the standard value is recorded and stored in the memory of the control system, such as an EEPROM.

Glass commonly for having two parallel plane's glass commonly used, as shown in fig. 2, the light of light emission end transmission advances glass with certain angle slant incidence, light emission end and light receiving terminal should have a determining deviation, this interval is relevant with incident angle and glass thickness, guarantees to experience once at least, the multiple reflection of being best is and is incited to the light receiving terminal, generally can get more than 5 times of glass thickness can.

The light emitted by the light emitting end enters the glass, is reflected at least once and then enters the receiving end, the received optical signal is converted into an electric signal by the photoelectric conversion diode at the receiving end, and the received electric signal is converted into a digital signal by the control system to carry out digital-to-analog conversion and sampling. The value of the received signal is judged through calculation processing of the received signal and compared with a previously prestored standard value.

The specific principle of judgment is as follows: as shown in fig. 3, in rainy days, rainwater appears on the outward surface of the glass, the refractive index of the rainwater is greater than that of air, after the rainwater appears, the reflectivity of the emitted light at the glass boundary changes, after multiple reflections, the change is amplified for multiple times, so that the intensity of the light received by the light receiving end changes, and finally the change is reflected by the change of the number value of the electrical signal formed by converting the optical signal.

For more convenient calculation and analysis, it is generally desirable that the light is totally reflected inside the glass in non-rainy days, the refractive index of the glass of a common window is about 1.5, and the critical angle of total reflection of the light when the light enters the air from the glass is gamma, then

Sin90 °/Sin γ =1.5, γ =41.8 °, i.e. at an angle of incidence greater than 41.8 °, total reflection occurs at the glass-air interface.

Meanwhile, the incident angle is expected to satisfy the condition that when the glass surface is wetted in rainy days, total reflection does not occur at the glass-water interface, when light enters water from the glass, the refractive index of the water is 1.3, and the critical angle of the total reflection occurs when the light enters the water from the glass is R, then Sin R/Sin 90 degrees =0.867, R =60.12 degrees, and therefore, when the incident angle is smaller than 60 degrees, the total reflection does not occur.

For example, the incident angle is 45 ℃, under the condition of no rain, the two interfaces of the glass are all reflected, the light signal received by the light receiving end is basically lossless, namely the received value is equal to or slightly different from the standard value.

In case of rain, the reflectivity caused by rain is assumed to be 80%, the received light is reflected by the glass-water interface twice and then received by the light receiving end, the received light intensity value is theoretically 64% of the transmitting end, namely the received light intensity value is 64% of the standard value and is obviously smaller than the standard value, at this time, it can be determined that rain occurs, the control system controls the driving system to close the window frame, and a specific control flow is shown in fig. 1.

In a preferred embodiment, a plurality of difference thresholds can be set, and the driving mechanism is controlled to close the window frame according to different rainfall amounts, when the rainfall amount is small, on one hand, a retention water layer is not easy to form on the surface of the glass rapidly, and simultaneously, for multiple reflections, raindrops do not always exist at each reflection point, which can cause the difference value between the final reflected light value and the standard value to change when the rainfall amount is different, so that the plurality of difference thresholds can be set to reflect different rainfall amounts.

For example, the difference threshold is two T1 and T2 with different magnitudes, where T2 is larger, the driving system controls the window to be completely closed according to the comparison result between the difference between the reflected light value and the standard value and the different difference threshold, when the difference between the reflected light value and the standard value is detected to be larger than T2, the driving system controls the window to be completely closed, and when the difference between the reflected light value and the standard value is detected to be only larger than T1 but smaller than T2, the driving system controls the window to be half closed, for example, the opening and closing angle of the window is changed from 90 degrees to 45 degrees or 30 degrees.

In order to avoid the interference of external light, such as the interference of driving car lamps, street lamps and the like. The utility model discloses can adopt the modulation transmission of certain frequency at the transmitting terminal, for example as shown in FIG. 4 a concrete implementation who gives control system, control system includes singlechip PC16F90 and rather than the driver CD4094 of being connected, still includes the LED constant current circuit that input and CD4094 are connected, constant current circuit includes operational amplifier and the switch tube that a negative feedback is connected, the switch tube establishes ties with the LED as light transmitting terminal, and driver CD4094 actually can drive eight at most ways of LED simultaneously, only draws in FIG. 4 and utilizes pin Q1 to carry out driven all the way.

In the embodiment shown in fig. 4, when the light is output, the operational amplifier LM358 of the constant current circuit equalizes the voltage at the inverting input terminal to the voltage at the non-inverting input terminal through the negative feedback connection of the switching tube Q, generates a constant current at the light emitting diode D through the constant current resistor R3, and forms a reference voltage input to the non-inverting input terminal of the operational amplifier by connecting the first resistor and the second resistor in series in a voltage division manner. When no illumination is output, the output of the driver chip 4094 to the positive input end of the operational amplifier is in a high impedance state, the voltage value is zero, and the light emitting diode D does not emit light.

A Timer2 provided in the single chip microcomputer 16F690 itself may be used to generate a Timer interrupt, and the on/off of the light emitting diode is alternately controlled by inverting the C6 pin of the OE terminal of the driver chip CD4094 connected to the transmitting terminal, so that the positive voltage of the light emitting diode is a high-frequency square wave signal, which generates periodic light emission, and the time period of the light emission should be equal to or longer than the time required for detection by the control system, thereby implementing frequency modulation on the light emitting diode to achieve the purpose of anti-interference, and the specific implementation flow is shown in fig. 6.

The control system detects the reflected light signals only in the light emitting period of the light emitting diode, can continuously detect the average value of a plurality of periods as the reflected light value compared with the standard value, and can avoid the interference caused by instant strong light such as the irradiation of the lamp of a vehicle.

The method can dynamically modify the standard value for better interference resistance, and in the initial state, after the control system is installed, the system works in the best matching state by adjusting the circuit, the signal value received by the receiving end in the initial state of no rain of the window glass is required to be taken as a standard value, and in the subsequent process, the standard value can be continuously and dynamically updated.

The light sensor receives light and converts the light into a digital signal which can be recognized by the singlechip, which is a mature prior art and is not described in detail herein.

A specific updating method may be to set a standard value and a difference threshold value, for example, the standard value is 100, the difference threshold value is 30, and enter a pending state of updating the standard value in a no-rain state, that is, the reflected light signal may be continuously stored, when the difference between the reflected light signal and the previous standard value is greater than the difference threshold value, it is considered that rain occurs, and then the mean value of the reflected light values in a previous period, for example, 1000 reflection cycles, is taken as a new standard value, and the time period is not longer, and generally does not exceed 1 hour.

And after the rain is considered to occur, the standard numerical value is not updated any more until the difference value between the reflected light value and the standard numerical value is lower than the difference threshold value or is lower than the difference threshold value for a certain time, the rain is considered to stop, and the updating undetermined state of the standard numerical value is restarted at the moment.

By adopting the updating method, the reflectivity change caused by the contamination of the outer layer of the glass or the use of the LED after long-term use can be automatically ignored, the dynamic change of the standard value caused by the difference between the daytime and the night or the weather can be overcome, the standard value can be dynamically updated, and the rain condition judgment after long-term use is more accurate.

As fig. 5 shows a typical external mechanical structure implementation, the driving system is a telescopic rod 5 installed between the window frame and the window fixing surface and a motor 6 driving the telescopic rod to extend and retract; the light emission end and the light receiving end are usually positioned on the same side of the glass 1, if the light emission end and the light receiving end cannot be in the inner side of rain at first, the emission end 2 and the receiving end 3 can be connected with the controller through wiring along the inside of the telescopic rod 5 or the edge of the window frame or the inside of the window frame, the control system 7 can be installed on the fixed surface of the window body, and data transmission between the control system and the emission end and the receiving end can also be communicated through wireless transmission modes such as Bluetooth.

The telescopic link can be provided with the pressure sensor who is connected with control system, senses barrier or mechanical fault and can automatic shutdown when leading to the stroke to be obstructed, guarantees safe in utilizationly.

Rainfall response smart window and control method adopts the optics principle, according to the strong and weak rainwater of judging on the window glass of received light what, judges the rainfall size, and the ventilation is taken into account when the angle that opens and shuts of automatic control window guarantees indoor rain-proof, takes care of user's many-sided demand, and market prospect is wide.

In the foregoing, the preferred embodiments of the present invention, if not obviously contradictory or based on a certain preferred embodiment, can be combined and used by any superposition, the specific parameters in the embodiments and examples are only for clearly expressing the utility model verification process of the utility model, and are not used for limiting the patent protection scope of the present invention, the patent protection scope of the present invention is still based on the claims, and all the equivalent structural changes made by the contents of the specification and the drawings of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a rainfall response smart window, is including the window frame of installing glass (1) and the actuating mechanism of drive window frame switch, its characterized in that still includes detecting system, detecting system is including installing light emission end (2) and the light receiving terminal (3) of interval on glass and possessing, still includes the control system who is connected with light emission end (2) and light receiving terminal (3), control system (7) are including the emission control ware, the steerable light emission end of emission control ware carries out periodic emission, control system (7) still are connected with actuating system.

2. The rainfall-sensing smart window according to claim 1, wherein said control system comprises a single-chip PC16F90 and a driver CD4094 connected thereto, and further comprising an LED constant current circuit having an input terminal connected to the CD4094, said constant current circuit comprising an operational amplifier and a switching tube connected in negative feedback, said switching tube being connected in series with the LED as a light emitting terminal.

3. The rainfall induction smart window of claim 1 wherein the drive system is a telescoping rod (5) mounted between the window frame and the window mounting surface and a motor (6) driving the telescoping rod.

4. A rainfall sensing smart window according to claim 3 wherein the telescopic rod (5) is provided with a pressure sensor.

5. A rain sensing smart window as claimed in claim 1, characterized in that the light emitting end (2) and the light receiving end (3) are located on the same side of the glass.

6. The rainfall-sensing smart window of claim 1, wherein the angle of incidence of the light emitting end (2) into the glass (1) is 42-60 degrees.