CN215599555U - Intelligent household appliance and light-sensing control device thereof - Google Patents
Intelligent household appliance and light-sensing control device thereof Download PDFInfo
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- CN215599555U CN215599555U CN202121694771.7U CN202121694771U CN215599555U CN 215599555 U CN215599555 U CN 215599555U CN 202121694771 U CN202121694771 U CN 202121694771U CN 215599555 U CN215599555 U CN 215599555U
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Abstract
The utility model discloses an intelligent household appliance and a light sensation control device thereof. The light sensation control device includes: the device comprises a photosensitive assembly, a direct current filter circuit, a zero-crossing detection circuit and a controller; the photosensitive assembly is used for collecting photoelectric signals and outputting the photoelectric signals to the direct current filter circuit, and the photoelectric signals represent the ambient brightness; the direct current filter circuit is used for filtering a direct current component in the photoelectric signal and outputting the photoelectric signal after the direct current component is filtered to the zero-crossing detection circuit; the zero-crossing detection circuit is used for sending a zero-crossing signal to the controller under the condition that the amplitude of the photoelectric signal after the direct-current component is filtered is detected to be zero, so that the controller is triggered to send a light sensation control instruction to the light sensation control device. The light sense controlling means carries out light sense control to intelligent household electrical appliances based on photoelectric signal after the filtering stroboscopic interference signal to can avoid because of the frequent control of intelligence household electrical appliances that stroboscopic interference leads to.
Description
Technical Field
The utility model relates to the field of intelligent household appliances, in particular to an intelligent household appliance and a light sensation control device thereof.
Background
At present, most of intelligent household appliances have a light sensation control function, namely, the operation data of the intelligent household appliances are adjusted according to the ambient brightness, for example, the brightness of an illuminating lamp on the intelligent household appliance is adjusted. Among the prior art, the ambient brightness signal through photosensitive element collection directly carries out light sense control to intelligent household electrical appliances, because the stroboscopic problem of indoor lighting lamp, causes the ambient brightness signal of gathering to have stroboscopic interference signal, carries out light sense control based on the ambient brightness signal of direct collection, can make intelligent household electrical appliances frequently controlled, and user experience is not good on the one hand, and on the other hand can increase the energy consumption of intelligent household electrical appliances.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defect that in the prior art, the light sensation control is carried out by directly acquiring an ambient brightness signal, and the intelligent household appliance is frequently controlled due to the fact that the acquired ambient brightness signal has a stroboscopic interference signal, and provides an intelligent household appliance and a light sensation control device thereof.
The utility model solves the technical problems through the following technical scheme:
in a first aspect, a light sensing control device for an intelligent household appliance is provided, wherein the intelligent household appliance comprises a light sensing control device; the light sensation control device includes: the photosensitive component, the direct current filter circuit, the zero-crossing detection circuit and the controller, wherein the input end of the direct current filter circuit is connected with the output end of the photosensitive component, the output end of the direct current filter circuit is connected with the input end of the zero-crossing detection circuit, and the output end of the zero-crossing detection circuit is connected with the controller;
the photosensitive assembly is used for collecting photoelectric signals and outputting the photoelectric signals to the direct current filter circuit, and the photoelectric signals represent ambient brightness;
the direct current filter circuit is used for filtering a direct current component in the photoelectric signal and outputting the photoelectric signal after the direct current component is filtered to the zero-crossing detection circuit;
the zero-crossing detection circuit is used for sending a zero-crossing signal to the controller under the condition that the amplitude of the photoelectric signal after the direct-current component is filtered is detected to be zero, so as to trigger the controller to send a light sensation control instruction to the light sensation control device.
Optionally, the photosensitive component comprises: a photosensitive element and a sampling circuit;
the sampling circuit comprises a first resistor, a second resistor and a first capacitor, wherein one end of the first resistor is respectively connected with the output end of the photosensitive element, one end of the second resistor and one end of the first capacitor, the other end of the first resistor and the other end of the first capacitor are grounded, and the other end of the second resistor is connected with the direct current filter circuit.
Optionally, the photosensitive component comprises: photosensitive element and sampling circuit, sampling circuit includes third resistance and RC filtering branch road, RC filtering branch road includes fourth resistance and second electric capacity, the one end of third resistance respectively with photosensitive element's output with the one end of fourth resistance is connected, the other end ground connection of third resistance, the other end of fourth resistance with the one end of second electric capacity and direct current filter circuit connects.
Optionally, a cutoff frequency of the RC filtering branch is smaller than a frequency threshold.
Optionally, the capacitance value of the second capacitor is smaller than a capacitance threshold.
Optionally, the dc filter circuit includes a third capacitor;
one end of the third capacitor is connected with the output end of the photosensitive assembly, and the other end of the third capacitor is connected with the input end of the zero-crossing detection circuit.
Optionally, the light sensation control device further includes: a timer and a comparator; the zero detection circuit is connected with the controller through the timer and the comparator;
the timer is used for starting timing under the condition of receiving the zero-crossing signal for the first time and sending timing duration to the controller under the condition of receiving the zero-crossing signal for the second time.
Optionally, the light sensation control device is an illuminating lamp;
the illuminating lamp is electrically connected with the controller.
Optionally, the controller is a micro control unit MCU or a programmable logic controller PLC or a system on a chip SOC.
The second aspect provides an intelligent household appliance, the intelligent household appliance comprises a light sensation control device and any one of the light sensation control devices, and the light sensation control device is electrically connected with the light sensation control device.
The positive progress effects of the utility model are as follows: the light sense controlling means carries out light sense control to intelligent household electrical appliances based on photoelectric signal after the filtering stroboscopic interference signal to can avoid because of the frequent control of intelligence household electrical appliances that stroboscopic interference leads to.
Drawings
Fig. 1 is a schematic block diagram of a light-sensing control device of an intelligent household appliance according to an exemplary embodiment of the present invention;
FIG. 2a is a circuit diagram of the optical sensing assembly of FIG. 1 according to an exemplary embodiment of the present invention;
FIG. 2b is another circuit diagram of the sensing assembly of FIG. 1 provided in an exemplary embodiment of the utility model;
fig. 3 is a schematic block diagram of another light-sensing control device for an intelligent home appliance according to an exemplary embodiment of the present invention.
Detailed Description
The utility model is further illustrated by the following examples, which are not intended to limit the scope of the utility model.
Fig. 1 is a schematic block diagram of a light-sensing control device of an intelligent household appliance according to an exemplary embodiment of the present invention, where the light-sensing control device is used to perform light-sensing control on a light-sensing control device of the intelligent household appliance. Referring to fig. 1, the light sensation control apparatus includes: photosensitive component 11, direct current filter circuit 12, zero crossing detection circuit 13 and controller 14. The input end of the direct current filter circuit 12 is connected with the output end of the photosensitive component 11, the output end of the direct current filter circuit 12 is connected with the input end of the zero-crossing detection circuit 13, and the output end of the zero-crossing detection circuit is connected with the controller 14.
The photosensitive component 11 is used for collecting photoelectric signals and outputting the photoelectric signals to the direct current filter circuit 12, and the photoelectric signals represent the ambient brightness. The photoelectric signal may be a photo-voltage signal or a photo-current signal, and the photo-sensing control process is described below by taking the photoelectric signal as the photo-voltage signal.
In one embodiment, referring to fig. 2a, the photosensitive element 11 comprises: a light sensitive element D and a sampling circuit 111. The photosensitive element converts the ambient light signal into a photocurrent signal, and the sampling circuit converts the photocurrent signal output by the photosensitive element D into a photovoltage signal. The sampling circuit 111 comprises a first resistor R1, a second resistor R2 and a first capacitor C1, wherein one end of the first resistor R1 is connected with the output end of the photosensitive element D, one end of the second resistor R2 and one end of the first capacitor C1, the other end of the first resistor R1 and the other end of the first capacitor C1 are both grounded, and the other end of the second resistor R2 is connected with the dc filter circuit 12.
In one embodiment, referring to fig. 2b, the photosensitive element 11 comprises: photosensitive element D and sampling circuit, sampling circuit include third resistance R3 and RC filtering branch 1111, and RC filtering branch 1111 includes fourth resistance R4 and second electric capacity C2, and the one end of third resistance R3 is connected with photosensitive element D's output and the one end of fourth resistance R4 respectively, and the other end of third resistance R3 is ground connection, and the other end of fourth resistance R4 is connected with the one end of second electric capacity C2 and DC filter circuit 12 respectively.
The cut-off frequency of the RC filtering branch circuit is larger than a frequency threshold, the frequency threshold is determined according to the stroboscopic frequency of the indoor illuminating lamp, namely the cut-off frequency of the RC filtering branch circuit needs to be larger than the stroboscopic frequency (for example, 120Hz) of the known common indoor illuminating lamp, when the stroboscopic interference of the light source exists, particularly the stroboscopic interference of the light source brings about the condition of large fluctuation, and after filtering, the stroboscopic interference of the light source can be effectively reduced.
The capacitance value of the second capacitor C2 is smaller than the capacitance threshold, and the capacitance threshold can be set according to actual requirements. The magnitude of the second capacitor C2 affects the response time of the ambient light data change, so the capacitance of the second capacitor C2 should not be too large.
The dc filter circuit 12 is configured to filter a dc component in the photovoltaic signal, and output the photovoltaic signal after the dc component is filtered to the zero-crossing detection circuit 13. The photovoltaic signal formed by natural light is a direct current quantity, and the amplitude of the photovoltaic signal does not form periodic fluctuation, so that the collected photovoltaic signal is approximately a direct current stable voltage under the condition of no stroboscopic interference signal, and the detected photovoltaic signal also can periodically fluctuate due to the fact that the frequency flicker of the indoor illuminating lamp is periodic variation under the condition of stroboscopic interference. After the photovoltage signal passes through the dc filter circuit 12, a dc component therein is filtered, and whether the photovoltage signal includes a strobe interference signal can be determined by determining whether an amplitude of an output result of the dc filter circuit 12 is periodically fluctuated.
In one embodiment, DC filter circuit 12 includes a third capacitor. One end of the third capacitor is connected with the output end of the photosensitive component 11, and the other end of the third capacitor is connected with the input end of the zero-crossing detection circuit 13.
In one embodiment, referring to fig. 3, the light sensation control device further includes a timer 15 and a comparator 16, and the zero detection circuit is connected to the controller 14 through the timer 15 and the comparator 16.
The zero-crossing detection circuit 13 is configured to output a zero-crossing signal to the timer 15 when detecting that the output result of the dc filter circuit 12 is 0, that is, the amplitude of the photovoltage signal after the dc component is filtered is zero.
The timer 15 is configured to start timing when receiving the zero-cross signal for the first time, stop timing when receiving the zero-cross signal for the second time, and send a timing duration to the comparator 16. The comparator 16 outputs the comparison result of the counted time length and the time length threshold a to the controller 14. The photovoltaic signal formed by natural light is a direct current, the amplitude of the photovoltaic signal does not form periodic fluctuation, and the ambient brightness does not fluctuate greatly within 1 second under normal conditions, so that under the condition of no stroboscopic interference, the amplitude of the collected photovoltaic signal is basically unchanged, the timing duration is close to 0, and the duration threshold value A can be set to be smaller, for example, the duration threshold value A takes a value within the range of 0 s-0.008 s.
If the comparison result is that the timing duration is less than the duration threshold value a, the controller 14 determines that the amplitude of the output result of the dc filter circuit 12 does not fluctuate periodically, the photovoltage signal acquired by the photosensitive component 11 does not have a stroboscopic interference signal, and the controller 14 directly performs the light sensation control on the light sensation control device 17 of the intelligent household appliance according to the photovoltage signal acquired by the photosensitive component 11.
If the comparison result is that the timing duration is not less than the duration threshold value a, the controller 14 determines that the amplitude of the output result of the dc filter circuit 12 is periodically fluctuated, the photovoltage signal acquired by the photosensitive component 11 has a stroboscopic interference signal, and the controller 14 performs the light sensing control on the light sensing control device 17 of the intelligent household appliance according to the photovoltage signal after the stroboscopic interference signal is filtered.
In an embodiment, if the controller 14 determines that the photovoltage signal acquired by the photosensitive component 11 has a strobe interference signal, the controller 14 triggers the sampling circuit to sample the photovoltage signal for multiple times in a strobe period, and the controller 14 obtains an average value (a direct current component) of the multiple samples, that is, the photovoltage signal after the strobe interference signal is filtered. The reason is that the positive and negative half-cycle interferences formed by the strobe interference signal cancel each other out after averaging, so the averaged value is the dc component of the photovoltage signal, and the dc component represents the ambient brightness after the strobe interference signal is filtered out. According to nyquist sampling law, after the frequency of a strobe interference signal (the strobe frequency is 1/T) in sampling data is determined, data extraction is performed on an ambient light signal at a sampling frequency greater than 2f, and the acquired data is averaged in units of the strobe period T measured by the above scheme. The deviations of the positive period and the negative period of the sine component of the stroboscopic interference can be mutually offset, so that the obtained average value is the sampling value corresponding to the stable ambient light data. Aiming at the problem of stroboscopic interference, the stroboscopic-based fluctuation is a sine wave with fixed frequency, the fluctuation frequency is used as a sampling period, and the period of integral multiple is sampled to obtain an average value, so that the stroboscopic problem can be eliminated. Here, it is necessary to ensure that the number of sampling points satisfies the nyquist sampling law, i.e., the sampling frequency needs to be greater than 2 times the signal frequency.
In one embodiment, for the strobe interference, the data fluctuation caused by the strobe interference can be eliminated in a fixed sampling period mode. For example, after determining the frequency of the strobe interference signal, the controller 14 triggers the sampling circuit to use an odd multiple of a half of the period thereof as the sampling period (i.e. 1, 3, 5, etc. times of the half period as the sampling period), so that it can be ensured that two adjacent sampling values are respectively located in the positive half period and the negative half period of the interference waveform, and thus the positive and negative values can be cancelled out to eliminate the sampling value fluctuation caused by the strobe. By setting the sampling period to be odd times of half of the light source stroboscopic interference period T, the period setting is more flexible, and no special requirements are made on program main cycle and interrupt processing. And the stroboscopic interference can eliminate the fluctuation caused by the interference by respectively taking one number from the positive period and the negative period.
In one embodiment, the light sensation control device is a light lamp, which is electrically connected to the controller 14. The controller 14 carries out light sense control to the light of intelligent household electrical appliances according to the photovoltage signal after filtering stroboscopic interference signal to can avoid because of the stroboscopic interference of indoor lighting, the frequent control that goes on the light of intelligent household electrical appliances, avoid the light of intelligent household electrical appliances to appear the situation that luminance is dim and dim.
In one embodiment, the controller 14 is a micro control unit MCU or a programmable logic controller PLC or a system on a chip SOC.
The embodiment of the utility model also provides an intelligent household appliance, which comprises a light sensation control device and the light sensation control device provided by any one of the embodiments, wherein the light sensation control device is electrically connected with the light sensation control device, and the light sensation control device carries out light sensation control on the light sensation control device of the intelligent household appliance according to the light voltage signal after the stroboscopic interference signal is filtered, so that the intelligent household appliance can be prevented from being frequently controlled due to stroboscopic interference.
While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the utility model, and these changes and modifications are within the scope of the utility model.
Claims (10)
1. The light sensation control device of the intelligent household appliance is characterized in that the intelligent household appliance comprises a light sensation control device; the light sensation control device includes: the photosensitive component, the direct current filter circuit, the zero-crossing detection circuit and the controller, wherein the input end of the direct current filter circuit is connected with the output end of the photosensitive component, the output end of the direct current filter circuit is connected with the input end of the zero-crossing detection circuit, and the output end of the zero-crossing detection circuit is connected with the controller;
the photosensitive assembly is used for collecting photoelectric signals and outputting the photoelectric signals to the direct current filter circuit, and the photoelectric signals represent ambient brightness;
the direct current filter circuit is used for filtering a direct current component in the photoelectric signal and outputting the photoelectric signal after the direct current component is filtered to the zero-crossing detection circuit;
the zero-crossing detection circuit is used for sending a zero-crossing signal to the controller under the condition that the amplitude of the photoelectric signal after the direct-current component is filtered is detected to be zero, so as to trigger the controller to send a light sensation control instruction to the light sensation control device.
2. The light sensation control device of an intelligent household appliance according to claim 1, wherein the photosensitive assembly comprises: a photosensitive element and a sampling circuit;
the sampling circuit comprises a first resistor, a second resistor and a first capacitor, wherein one end of the first resistor is respectively connected with the output end of the photosensitive element, one end of the second resistor and one end of the first capacitor, the other end of the first resistor and the other end of the first capacitor are grounded, and the other end of the second resistor is connected with the direct current filter circuit.
3. The light sensation control device of an intelligent household appliance according to claim 1, wherein the photosensitive assembly comprises: photosensitive element and sampling circuit, sampling circuit includes third resistance and RC filtering branch road, RC filtering branch road includes fourth resistance and second electric capacity, the one end of third resistance respectively with photosensitive element's output with the one end of fourth resistance is connected, the other end ground connection of third resistance, the other end of fourth resistance with the one end of second electric capacity and direct current filter circuit connects.
4. The light sensation control device of an intelligent household appliance according to claim 3, wherein the cutoff frequency of the RC filter branch is less than a frequency threshold.
5. The light sensation control device of an intelligent household appliance according to claim 3, wherein the capacitance value of the second capacitor is smaller than a capacitor threshold value.
6. The light sensation control device of an intelligent household appliance according to claim 1, wherein the direct current filter circuit comprises a third capacitor;
one end of the third capacitor is connected with the output end of the photosensitive assembly, and the other end of the third capacitor is connected with the input end of the zero-crossing detection circuit.
7. The light sensation control device of an intelligent household appliance according to claim 1, further comprising: a timer and a comparator; the zero detection circuit is connected with the controller through the timer and the comparator;
the timer is used for starting timing under the condition of receiving the zero-crossing signal for the first time and sending timing duration to the controller under the condition of receiving the zero-crossing signal for the second time.
8. The light sensation control device of an intelligent household appliance according to claim 1, wherein the light sensation control device is an illuminating lamp;
the illuminating lamp is electrically connected with the controller.
9. The light sensation control device of an intelligent household appliance according to claim 1, wherein the controller is a Micro Control Unit (MCU), a Programmable Logic Controller (PLC) or a System On Chip (SOC).
10. An intelligent household appliance, which is characterized by comprising a light sensation control device and the light sensation control device as claimed in any one of claims 1 to 9, wherein the light sensation control device is electrically connected with the light sensation control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121694771.7U CN215599555U (en) | 2021-07-23 | 2021-07-23 | Intelligent household appliance and light-sensing control device thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121694771.7U CN215599555U (en) | 2021-07-23 | 2021-07-23 | Intelligent household appliance and light-sensing control device thereof |
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| Publication Number | Publication Date |
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| CN215599555U true CN215599555U (en) | 2022-01-21 |
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| CN202121694771.7U Active CN215599555U (en) | 2021-07-23 | 2021-07-23 | Intelligent household appliance and light-sensing control device thereof |
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- 2021-07-23 CN CN202121694771.7U patent/CN215599555U/en active Active
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