CN101893723B - Automatic induction method - Google Patents
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- CN101893723B CN101893723B CN201010244920XA CN201010244920A CN101893723B CN 101893723 B CN101893723 B CN 101893723B CN 201010244920X A CN201010244920X A CN 201010244920XA CN 201010244920 A CN201010244920 A CN 201010244920A CN 101893723 B CN101893723 B CN 101893723B
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Abstract
The invention discloses an automatic induction method for controlling corresponding equipment in a kitchen or a lavatory. The method comprises the following steps of: regularly sampling ambient light and calculating the intensity of the ambient light through an ambient light inductor at first; when the variable quantity of the intensity of the ambient light is more than a preset limit, turning ona proximity inductor to detect whether a user uses the corresponding equipment in the kitchen or the lavatory or not; when the proximity inductor does not detect that the user enters into sensing regions within a specific judgment time, stopping the detection of the proximity inductor and starting the collection of the ambient light again; and when the proximity inductor detects that the user enters into sensing regions within the specific judgment time, controlling to finish the work of the corresponding equipment in thekitchen or the lavatory, then stopping the detection of the proximity inductor and starting the collection of the ambient light again. The automatic induction method can effectively reduce the energy consumption of an inductor used for controlling the equipment in the kitchen or the lavatory.
Description
[technical field]
The present invention relates to a kind of automatic induction method, relate in particular to the automatic induction method that is used to control other equipment in automatic faucet or kitchen, the lavatory.
[background technology]
In the prior art, the inductor that is applied to other equipment (like urinal, w.c.pan etc.) in automatic faucet and kitchen or the lavatory of controlling is generally the infrared induction sensor.The traditional infrared induction pick-up comprises infrared transmitter and infrared remote receiver.Wherein, infrared transmitter be with regular time do not stop at interval send infrared ray to induction region, sent once in for example per 0.3 second.And said infrared remote receiver receives the infrared signal of returning.According to being carried out power, the intensity of the infrared signal that receives detects; Judge that equipment has or not the user in kitchen or the lavatory; Thereby control kitchen or lavatory equipment are carried out corresponding action, for example control water outlet or the sealing of automatic faucet, the bath of control urinal etc.Specifically, on water swivel example with the infrared induction sensor application.When the infrared inductor judgement had the user to get into induction region, the control water swivel was opened valve and water outlet; When judging that the user leaves induction region, control the water swivel valve-off and sealing.And for example, on urinal example with the infrared induction sensor application.When the infrared inductor judgement had the people to use, control urinal outlet valve was opened and is carried out preceding bath; And after judging no user (being that the user leaves), control urinal outlet valve is opened once more and is carried out backlash.According to foregoing description, realized that by the infrared induction sensor water swivel and lavatory bath device works automatically.This is the industry general technology of employing of institute at present.
Because traditional infrared induction water swivel all is to adopt powered by direct current, how to save the electric energy that infrared inductor consumes, prolong battery serviceable life, become industry institute question of common concern.In order to realize the purpose of low-power consumption, people improve for the induction mode of traditional infrared induction sensor.Under normal condition, infrared inductor is responded to lower transmission frequency emission infrared ray.In case when judging when having the user to use kitchen or lavatory in relevant device the ultrared frequency quickening of infrared induction sensor emission.Yet it is very limited that the effect of saving power consumption on the one hand is set like this, can reduce the comfort level of use on the other hand, when for example being applied on the automatic faucet, after the user is put into induction region at the beginning, may the long period just understand water outlet.
Even if in continuous exploration, but traditional infrared induction sensor no matter be which kind of frequency to launch infrared ray with, all needs continual work to people to the low-power consumption implementation method of infrared inductor.Therefore, the energy of infrared induction sensor consumption is very considerable.For general occasion, the automatic induction tap of frequency of utilization lower (using every day 50 times) for example, it sends energy that infrared light consumed will be above 30% of total power consumption.
Simultaneously, also occurred novel inductors such as microwave Doppler inductor, ultrasonic sensing device are applied in kitchen or the lavatory in the prior art in recent years.Compare traditional infrared inductor, this type inductor can not receive many constraints of environment.But the need of work of these inductors consumes more electric energy, even needs to use alternating current could guarantee its routine work.
No matter adopt which kind of inductor and which kind of mode, the problem that power consumption can't reduce is perplexing us all the time.In the today of advocating energy-conserving and environment-protective, people are especially constantly exploring and research, in the hope of developing the good and more energy-conservation automatic induction system of a kind of inductive effects.
[summary of the invention]
The object of the present invention is to provide a kind of low-power consumption, detect accurate automatic induction method.
The object of the invention is realized through one of following technical scheme: a kind of automatic induction method in order to control kitchen or lavatory relevant device, comprises the steps: through environment light sensor timing sampling surround lighting and computing environment light intensity.When the variable quantity of ambient light intensity greater than preset limit value, open near inductor, whether detect has the user to use kitchen or lavatory relevant device.When in the judgement time of regulation, when not detected the user and get in the induction region, withdraw near inductor and detect near inductor, carry out the surround lighting collection again.When in the judgement time of regulation, when having detected the user and get in the induction region, then control corresponding kitchen or lavatory equipment work near inductor, execute associative operation after, withdraw near inductor and detect, carry out the surround lighting collection again.
Further, said environment light sensor is passive photodiode.
Further, said is infrared inductor near inductor, comprises to induction region launching the infrared receiver that infrared signal is returned in ultrared infrared emission unit and reception.
The object of the invention is realized through two of following technical scheme: a kind of automatic induction method in order to control kitchen or lavatory relevant device, comprises the steps: through environment light sensor timing sampling surround lighting and computing environment light intensity.The variable quantity that is positioned at preset compare threshold interval and ambient light intensity when the ambient light intensity value is opened near inductor greater than preset limit value, and whether detect has the user to use kitchen or lavatory relevant device.When in the judgement time of regulation, when not detected the user and get in the induction region, withdraw near inductor and detect near inductor, carry out the surround lighting collection again.When in the judgement time of regulation, when having detected the user and get in the induction region, then control corresponding kitchen or lavatory equipment work near inductor, execute associative operation after, withdraw near inductor and detect, carry out the surround lighting collection again.
Further, said environment light sensor is passive photodiode.
Further, said is infrared inductor near inductor, judges with normal working frequency emission infrared light.
Further; Automatic induction method also comprises low light level state determining step: when ambient light intensity value during less than the interval minimum value of compare threshold, be judged as low light level state, carry out infrared judgement; Under said low light level state, infrared determination frequency is less than normal working frequency.
Further; Automatic induction method also comprises high light state determining step: when ambient light intensity value during greater than the interval maximal value of compare threshold, be judged as the high light state, carry out infrared judgement; Under said high light state, infrared determination frequency is more than or equal to normal working frequency.
Compared with prior art; Environment light sensor through passive or low-power consumption carries out pre-detection; Mainly trigger bigger the carrying out user mode near inductor work and detect of relative power consumption again, further control kitchen and lavatory equipment and carry out corresponding action according to the variable quantity of ambient light intensity.Be provided with like this, help realizing low-power consumption, make that automatic induction system is more energy-conservation, it is more accurate to detect.
[description of drawings]
Fig. 1 is the structured flowchart of automatic induction system of the present invention.
Fig. 2 is an automatic induction system partial circuit synoptic diagram of the present invention.
Fig. 3 is a preferred implementation schematic flow sheet of automatic induction method of the present invention.
Fig. 4 is another preferred implementation schematic flow sheet of automatic induction method of the present invention.
Fig. 5 is another preferred implementation schematic flow sheet of automatic induction method of the present invention.
Fig. 6 is another preferred implementation schematic flow sheet of automatic induction method of the present invention.
Fig. 7 a is under the situation of unglazed interference, the ambient light intensity value synoptic diagram that collects.
Fig. 7 b is under the situation that has light to disturb, the ambient light intensity value synoptic diagram that collects.
Fig. 8 is the schematic flow sheet of anti-power frequency light interference method in the automatic induction method of the present invention.
[embodiment]
As shown in Figure 1, automatic induction system 100 of the present invention is applied in automatic faucet or kitchen, the lavatory on other relevant devices, like urinal, w.c.pan etc.In the embodiment as shown in Figure 1, automatic induction system 100 of the present invention comprises environment light sensor 1, infrared inductor 2 and controller 3.Ambient light intensity in wherein said environment light sensor 1 detection kitchen, the lavatory around the relevant device 4 changes, and testing result is exported to controller 3.Controller 3 judges according to information such as environment light intensity and variable quantities whether decision starts infrared inductor 2 work or get into duty from dormant state.After infrared inductor 2 was activated, whether infrared inductor 2 emission infrared light detection had object (like human body or staff etc.) to get into induction region.Infrared inductor 2 is exported to controller 3 with detected result.3 pairs of these infrared external reflection signals of controller are handled, and decision is action further, for example control in the opening the valve water outlet, close valve seal or kitchen of water swivel, the lavatory other equipment execution corresponding action etc.
Wherein, environment light sensor 1 is the light sensor that is used for ambient light, can be photodiode, phototriode or photoresistance etc.In the present invention one preferred embodiment, this environment light sensor 1 adopts photodiode.Because photodiode is a kind of semiconductor devices that can transform light energy be become electric energy, generally as silicon photocell.Photodiode is a kind of passive sensing device, itself is not catabiotic, is commonly referred to as passive photodiode.Therefore, compare phototriode or photoresistance etc., adopt photodiode, can realize Zero-energy consumption as environment light sensor.Really, under the situation of conditions permit, for example battery capacity is enough big etc., and environment light sensor 1 also can adopt light sensors such as phototriode or photoresistance.
Said infrared inductor 2 comprises infrared light transmitter unit and infrared light receiving element.Said infrared light transmitter unit is generally light emitting diode, to induction region emission infrared ray; And said infrared light transmitter unit receives from induction region and returns the infrared external reflection signal of returning, and this infrared external reflection signal is exported to controller 3 handle.
Said controller 3 is connected with the topworks of environment light sensor 1, infrared inductor 2 and kitchen, lavatory relevant device 4, in order to process information and control corresponding topworks and carry out corresponding actions.
Under the unmanned state that uses, said environment light sensor 1 is sensed ambient light intensity to be constant or slowly to change, therefore, this moment infrared inductor 2 can not work or with the long time interval (as: 2 seconds) to induction region emission infrared ray.Here reach in the following description, send infrared ray with the long time interval and can be called dormant state.Under dormant state, infrared inductor 2 also is work.
When the approaching said kitchen of user, lavatory relevant device 4, said environment light sensor 1 is sensed this relevant device 4 surrounding environment light intensities and is produced sudden change.Environment light sensor 1 is passed to controller 3 with the jump signal that detects.
3 pairs of jump signals that receive of controller are handled, and it is pre-conditioned whether the variable quantity of judging ambient light intensity satisfies, as whether the variable quantity of judging ambient light intensity is greater than preset limit value.When satisfy pre-conditioned after, trigger infrared inductor 2 work, send infrared ray with normal frequency of operation to induction region.Below the present invention in each embodiment, set infrared inductor 2 normal frequency of operation and be 0.3 second and launch once.Perhaps adjust the infrared frequency of infrared inductor 2, get into normal operating conditions, send infrared ray to induction region with normal frequency of operation from dormant state.In another embodiment of the present invention; Except that the variable quantity of judging ambient light intensity whether satisfy pre-conditioned; It is pre-conditioned to judge also whether the ambient light intensity value satisfies; Judge that promptly working as the ambient light intensity value is positioned at preset compare threshold interval, the variable quantity of judging ambient light intensity again is greater than preset limit value.Specifically, repeat no more please with reference to the description in the automatic induction method of the present invention embodiment shown in Figure 4 here.
Said infrared inductor 2 infrared emission units emission infrared ray is accurately discerned user's position and is judged.Infrared inductor 2 infrared receivers will detect the infrared external reflection signal and pass to controller 3; And then handle by 3 pairs of these infrared external reflection signals of controller; Control relevant device 4 actions in kitchen or the lavatory; As control the water outlet of water swivel valve opening solenoid valve, or the valve opening solenoid valve bath of control urinal etc.
As stated, infrared inductor 2 is not worked or is in dormant state when unmanned the use.Satisfy preset condition and have only when environment light sensor 1 detected surround lighting variable quantity etc., infrared inductor 2 is just started working or is got into duty by dormant state.Because the work of environment light sensor 1 does not require the expenditure of energy or consumes minimum energy, therefore, with prior art comparatively speaking, can effectively reduce system power dissipation through automatic induction system 100 of the present invention.Further, be used as basis for estimation, start infrared inductor according to the variable quantity of ambient light intensity, make judge more accurate, reliably.
Utilize above-mentioned automatic gain control unit, automatic gain control can be divided into fourth gear.First grade, first, second analog switch K1 and K2 connect, and first, second, third resistance R 1, R2, R3 form parallel connection; Second grade, the first analog switch K1 connects, and the second analog switch K2 breaks off, and the first, the 3rd resistance R 1, R3 form path; Third gear, the first analog switch K1 breaks off, and the second analog switch K2 connects, and second, third resistance R 2, R3 form path; Fourth speed, first, second analog switch K1 and K2 break off, and this moment the 3rd, resistance R 3 formed path.
In the present invention one preferred embodiment, resistance R 1 is 470K, and resistance R 2 is 2M, and resistance R 3 is 20M.When analog switch K1, K2 connected, feedback resistance was about 380K; When the K1 connection, when K2 broke off, feedback resistance was about 470K; When the K1 disconnection, when K2 connected, feedback resistance was about 1.8M; When K1, K2 broke off, feedback resistance was about 20M.
Really, according to practical situations, the control of the automatic gain of automatic gain control unit of the present invention can be two grades or other many grades.Said automatic gain control circuit changes accordingly.
Above-mentioned automatic gain control unit implementation procedure is following:
Be provided with in advance the compare threshold interval (P2, P1), wherein first compare threshold is P1, second compare threshold is P2.
When ambient light intensity magnitude of voltage during greater than the first compare threshold P1, then reduce feedback resistance, reduce gain.Especially, when the ambient light intensity magnitude of voltage is tuned to minimumly greater than the first compare threshold P1 and gain, then think the high light state, i.e. light direct projection state.
When ambient light intensity magnitude of voltage during less than the second compare threshold P2, then increase feedback resistance, improve gain.Especially, when the ambient light intensity magnitude of voltage is tuned to the highlyest less than the second compare threshold P2 and gain, then think low light level state, i.e. night or dark state.
When being in above-mentioned high light state or low light level state, directly open infrared inductor 2, carry out infrared judgement.Under low light level state, can think (like evening) under the dark state that frequency of utilization is lower, so the infrared emission frequency is less than normal working frequency, like 0.5 second or infrared ray of emission in 0.8 second.Under low light level state, the infrared emission cycle was good between 0.5 second to 1 second.Under the high light state, the infrared emission frequency is more than or equal to normal working frequency, as once with normal working frequency emission in 0.3 second, or greater than normal working frequency with emission in 0.2 second once.
In the present invention one preferred embodiment, 80%, the second compare threshold P2 that the said first compare threshold P1 value is the circuit maximum voltage value is 20% of a circuit maximum voltage value.Selecting of above-mentioned resistance and compare threshold can effectively be eliminated the control return difference, avoids the frequent variations that gains.In addition, increase low light level state model and high light state model, make that automatic induction system 100 inductions of the present invention are more reliable, perfect.
Through foregoing circuit, automatic induction system 100 of the present invention can be implemented in 0.5LUX and in the scope of 1000LUX, discerns, and can satisfy the actual needs in kitchen or the lavatory fully.
Because automatic induction system 100 of the present invention is applied to occasions such as kitchen or lavatory, is easy to receive the interference of power frequency light such as fluorescent light.Shown in Fig. 7 a and Fig. 7 b, under the situation of unglazed interference, the ambient light intensity magnitude of voltage that is collected is more steady.And when light disturbed, tangible fluctuation then can take place in the ambient light intensity magnitude of voltage that is collected.Therefore, under the situation that light disturbs, the ambient light intensity magnitude of voltage that is collected can't truly reflect actual conditions and by the judgement that possibly lead to errors.Therefore, automatic induction system 100 of the present invention also comprises anti-power frequency light interference units.Should being provided with of anti-power frequency light interference units can prevent of the interference of power frequency light effectively, make that environment light sensor 1 detected ambient light intensity was more accurate, the elevator system overall performance the surround lighting collection.
As shown in Figure 8, the implementation procedure of anti-power frequency light interference units is following:
Usually (for example: half-wave 50Hz/60Hz) is interference period T with power frequency because power frequency light disturbs.
At first, T/2 in the cycle with uniform time interval sampling N secondary environment light intensity value.In the present invention one preferred embodiment, N equals 5.
Secondly, calculate the relative undulate quantity Δ V of the ambient light intensity that collects.In the present invention one preferred embodiment, utilize formula: calculate Δ V=(Vmax-Vmin)/((Vmax+Vmin)/2).Said Vmax value and Vmin value are respectively the minimum and maximum value of voltage of ambient light intensity in the T/2 cycle.
Do you once more, judge that said relative undulate quantity Δ V is less than preset definite value W? As be judged as and be, judge that no power frequency light disturbs, export as ambient light intensity with the mean value of sampling for above-mentioned N time.As be not judged as not, judging has power frequency light to disturb, and with the same interval N secondary environment light intensity of sampling again, exports as ambient light intensity with the mean value of sampling for 2N time.
In the present invention one preferred embodiment, this W value is 3%.
Because anti-power frequency light interference units adopts different environment light intensity calculating method having power frequency light to disturb and not having under the situation of power frequency light interference, therefore can also effectively reduce power consumption, meets the development trend of energy-conserving and environment-protective.
With reference to shown in Figure 3, automatic induction method one of the present invention preferred embodiment in, automatic induction method of the present invention comprises the steps:
It is K that preset ambient light intensity changes limit value.If the variable quantity of double ambient light intensity, judges that jump signal is arranged greater than preset limit value K, get into step 3; Otherwise, be judged as no jump signal, get back to step 1 and gather surround lighting and computing environment light intensity again.In the present invention one preferred embodiment, said limit value K is 5%.
In this step, the variable quantity of the judgement ambient light intensity of foregoing description is for judging double ambient light intensity value variable quantity.Then; In some cases; For example under the user moves more slowly situation, if only judge according to the variable quantity of continuous ambient light intensity value, the situation that is easy to cause because this variable quantity is not more than preset limit value judging inefficacy takes place.Therefore, in other embodiments of the present invention, the variable quantity of judging ambient light intensity also can be to judge the ambient light intensity value variable quantity of certain hour at interval, as judge at interval once, twice or the ambient light intensity value variable quantity of collection period repeatedly.
As in the judgement time of regulation, when not detected the user and getting in the induction region, withdraw from infrared judgement, return step 1 and carry out surround lighting again and detect.As when having detected the user and getting into induction zone, then control corresponding kitchen or lavatory equipment work, for example water swivel opens the valve water outlet or closes valve seal etc.After executing associative operation, withdraw from infrared judgement, return step 1 and carry out the surround lighting detection again.
In order to improve the accuracy that surround lighting detects, automatic induction method of the present invention another preferred embodiment in, automatic induction method of the present invention increases ambient light intensity value determining step.With reference to shown in Figure 4, automatic induction method of the present invention comprises the steps:
Does step 2 judge that the ambient light intensity value is positioned at preset compare threshold interval? As be judged as not, directly get back to step 1, resampling surround lighting and computing environment light intensity; As be judged as and be, get into step 3.
Preset compare threshold interval be (P2, P1), wherein first compare threshold is P1, second compare threshold is P2.In the present invention one preferred embodiment, 80%, the second compare threshold P2 that the said first compare threshold P1 value is the circuit maximum voltage value is 20% of a circuit maximum voltage value.
It is K that preset ambient light intensity changes limit value.If the variable quantity of double ambient light intensity, judges that jump signal is arranged greater than preset limit value K, get into step 4; Otherwise, be judged as no jump signal, get back to step 1 and gather surround lighting and computing environment light intensity again.In the present invention one preferred embodiment, said limit value K is 5%.
In this step, the variable quantity of the judgement ambient light intensity of foregoing description is for judging double ambient light intensity value variable quantity.Then; In some cases; For example under the user moves more slowly situation, if only judge according to the variable quantity of continuous ambient light intensity value, the situation that is easy to cause because this variable quantity is not more than preset limit value judging inefficacy takes place.Therefore, in other embodiments of the present invention, the variable quantity of judging ambient light intensity also can be to judge the ambient light intensity value variable quantity of certain hour at interval, as judge at interval once, twice or the ambient light intensity value variable quantity of collection period repeatedly.
When carrying out infrared judgement, in the judgement time of regulation, when getting in the induction region, withdraw from infrared judgement as not detected the user, return step 1 and carry out the surround lighting detection again; As when having detected the user and getting in the induction region, promptly control corresponding kitchen or lavatory equipment work, for example water swivel opens the valve water outlet or closes valve seal.After executing associative operation, withdraw from infrared judgement, return step 1 and carry out the surround lighting detection again.
In this embodiment, increase to judge whether the ambient light intensity value is positioned at the determining step in preset compare threshold interval, whether the variable quantity that goes again to judge ambient light intensity is greater than preset limit value.Feasible judgement is more accurate.
With reference to shown in Figure 5; Automatic induction method of the present invention another preferred embodiment in; In order to guarantee effective work of automatic induction system under low light level state (like night) or high light state; Automatic induction method of the present invention increases low light level state model and the judgement of high light state model on second preferred embodiment the basis, comprise the steps:
Does step 2 judge that the ambient light intensity value is positioned at preset compare threshold interval? As be judged as not, get into step 3; As be judged as and be, get into step 4.
Preset compare threshold interval (P2, P1), wherein first compare threshold is P1, second compare threshold is P2.In the present invention one preferred embodiment, 80%, the second compare threshold P2 that the said first compare threshold P1 value is the circuit maximum voltage value is 20% of a circuit maximum voltage value.
When ambient light intensity during greater than the first compare threshold P1, then think the high light state, start infrared inductor 2, carry out infrared judgement.Determination frequency under the high light state model is more than or equal to normal working frequency.In an embodiment of the present invention, under the high light state model, the time of opening infrared judgement was made as 60 seconds, and determination frequency is to judge once in 0.2 second.In another embodiment of the present invention, under the high light state model, the time of opening infrared judgement was made as 60 seconds, and determination frequency is to judge once in 0.3 second.
When ambient light intensity during less than the second compare threshold P2, then think low light level state, start infrared inductor 2, carry out infrared judgement.Determination frequency under low light level state model is less than normal working frequency.Under low light level state model, the time of opening infrared judgement was made as 60 seconds, and determination frequency is to judge once in 0.5 second.Really, also can be to judge once in 0.8 second.In general, once be good to judge in 0.5 to 1 second the scope.
It is K that preset ambient light intensity changes limit value.If the variable quantity of double ambient light intensity, judges that jump signal is arranged greater than preset limit value K, get into step 5; Otherwise, be judged as no jump signal, get back to step 1 and gather surround lighting and computing environment light intensity again.In the present invention one preferred embodiment, said limit value K is 5%.
In this step, the variable quantity of the judgement ambient light intensity of foregoing description is for judging double ambient light intensity value variable quantity.Then; In some cases; For example under the user moves more slowly situation, if only judge according to the variable quantity of continuous ambient light intensity value, the situation that is easy to cause because this variable quantity is not more than preset limit value judging inefficacy takes place.Therefore, in other embodiments of the present invention, the variable quantity of judging ambient light intensity also can be to judge the ambient light intensity value variable quantity of certain hour at interval, as judge at interval once, twice or the ambient light intensity value variable quantity of collection period repeatedly.
Step 5 is carried out infrared judgement, detects object.Start infrared inductor 2, also comprise making infrared inductor 2 get into duty from dormant state.Here, the time of opening infrared judgement was made as 2 seconds, and frequency of operation is to judge once in 0.3 second.
When carrying out infrared judgement, in the judgement time of regulation, when getting in the induction region, withdraw from infrared judgement, return step 1 and carry out surround lighting again and detect as not detected the user; As when having detected the user and getting into induction region, promptly control corresponding kitchen or lavatory equipment work, for example water swivel opens the valve water outlet or closes valve seal.After executing associative operation, withdraw from infrared judgement, return step 1 and carry out the surround lighting detection again.
Further, automatic induction method of the present invention another preferred embodiment in, automatic induction method of the present invention also comprises Gain Automatic adjusting.With reference to shown in Figure 6, automatic induction method of the present invention comprises the steps:
Does step 2 judge that the ambient light intensity value is positioned at preset compare threshold interval? As be judged as not, get into step 3; As be judged as and be, get into step 4.
Preset compare threshold interval (P2, P1), wherein first compare threshold is P1, second compare threshold is P2.In the present invention one preferred embodiment, 80%, the second compare threshold P2 that the said first compare threshold P1 value is the circuit maximum voltage value is 20% of a circuit maximum voltage value.
When ambient light intensity value during, judge that further gain control is a deep low gear greater than the first compare threshold P1? As be judged as not, gain control is reduced by one grade; As be judged as and be, then think the high light state, start infrared inductor, carry out infrared judgement.Determination frequency under the high light state model is more than or equal to normal working frequency.In an embodiment of the present invention, under the high light state model, the time of opening infrared judgement was made as 60 seconds, and determination frequency is to judge once in 0.2 second.In another embodiment of the present invention, under the high light state model, the time of opening infrared judgement was made as 60 seconds, and determination frequency is to judge once in 0.3 second.
Especially, in the present invention one preferred embodiment, gain control is directly got back to step 1, resampling surround lighting and computing environment light intensity after reducing by one grade.Really, in another embodiment of the present invention, gain control also can start infrared inductor and carry out infrared judgement after reducing by one grade.Here, the time of opening infrared judgement was made as 2 seconds, and determination frequency is to judge once in 0.3 second.
When ambient light intensity value during, judge that further gain control is for the most high-grade whether less than the second compare threshold P2? As be judged as not, gain control is increased by one grade; As be judged as and be, then think low light level state, start infrared inductor, carry out infrared judgement.Determination frequency under low light level state model is less than normal working frequency.Under low light level state model, the time of opening infrared judgement was made as 60 seconds, and determination frequency is to judge once in 0.5 second.Really, also can be to judge once in 0.8 second.In general, judged once be good with 0.5 to 1 second.
Especially, in the present invention one preferred embodiment, gain control is directly got back to step 1, resampling surround lighting and computing environment light intensity after increasing by one grade.Really, in another embodiment of the present invention, gain control also can start infrared inductor and carry out infrared judgement after increasing by one grade.Here, the time of opening infrared judgement was made as 2 seconds, and determination frequency is to judge once in 0.3 second.
The subnormal frequency of operation of determination frequency under low light level pattern.Because under low light level pattern, very likely be under night or the dark state, in this case, the general frequency of using is very low, therefore can reduce determination frequency, realizes low-power consumption.Determination frequency under the high light pattern will be higher than normal frequency of operation.Under the high light pattern, increase determination frequency, can be so that judgement be more accurate.
It is K that preset ambient light intensity changes limit value.If the variable quantity of double ambient light intensity, judges that jump signal is arranged greater than preset limit value K, get into step 3; Otherwise, be judged as no jump signal, get back to step 1 and gather surround lighting and computing environment light intensity again.In the present invention one preferred embodiment, said limit value K is 5%.
In this step, the variable quantity of the judgement ambient light intensity of foregoing description is for judging double ambient light intensity value variable quantity.Then; In some cases; For example under the user moves more slowly situation, if only judge according to the variable quantity of continuous ambient light intensity value, the situation that is easy to cause because this variable quantity is not more than preset limit value judging inefficacy takes place.Therefore, in other embodiments of the present invention, the variable quantity of judging ambient light intensity also can be to judge the ambient light intensity value variable quantity of certain hour at interval, as judge at interval once, twice or the ambient light intensity value variable quantity of collection period repeatedly.
Step 5 is carried out infrared judgement, detects object.Start infrared inductor 2, also comprise making infrared inductor 2 get into duty from dormant state.Here, the time of opening infrared judgement was made as 2 seconds, and frequency of operation is to judge once in 0.3 second.
When carrying out infrared judgement, in the judgement time of regulation, when getting in the induction region, withdraw from infrared judgement, return step 1 and carry out surround lighting again and detect as not detected the user; As when having detected the user and getting into induction region, promptly control corresponding kitchen or lavatory equipment work, for example water swivel opens the valve water outlet or closes valve seal.After executing associative operation, withdraw from infrared judgement, return step 1 and carry out the surround lighting detection again.
Shown in Fig. 7 a and Fig. 7 b, under the situation of unglazed interference, the ambient light intensity magnitude of voltage that is collected is more steady.And when light disturbed, tangible fluctuation then can take place in the ambient light intensity magnitude of voltage that is collected.Therefore, under the situation that light disturbs, the ambient light intensity magnitude of voltage that is collected can't truly reflect actual conditions and by the judgement that possibly lead to errors.Therefore, in order to judge more accurately and reliably, automatic induction method of the present invention is in execution in step: gather and during the computing environment light intensity, can add anti-power frequency light and disturb step.Because automatic induction system of the present invention is applied to occasions such as kitchen or lavatory; Be easy to receive the interference of power frequency light such as fluorescent light; Therefore; Should being provided with of anti-power frequency light interference units can prevent of the interference of power frequency light effectively, make that the detected ambient light intensity of environment light sensor was more accurate, the elevator system overall performance the surround lighting collection.
As shown in Figure 8, concrete performing step is following:
Step 1: earlier T/2 in the cycle with uniform time interval sampling N secondary environment light intensity.Usually (for example: half-wave 50Hz/60Hz) is interference period T with power frequency because power frequency light disturbs.Therefore, earlier T/2 in the cycle with uniform time interval sampling N secondary environment light intensity.In the present invention one preferred embodiment, N equals 5.
Does step 3 judge that said relative undulate quantity Δ V is less than preset definite value W? As be judged as and be, judge that no power frequency light disturbs, and gets into step 4; As be judged as not, judging has power frequency light to disturb, and gets into step 5.In the present invention one preferred embodiment, this W value is 3%.
Step 5 with the same interval N secondary environment light intensity of sampling again, is exported as ambient light intensity with the mean value of 2N sampling.
Be applied to be illustrated on the water swivel below in conjunction with automatic induction system of the present invention and method.
The environment light sensor 1 of automatic induction system 100 of the present invention, infrared inductor 2 are installed on respectively on water swivel (not shown) body, and controller 3 is connected with environment light sensor 1, infrared inductor 2, the flowing water Valve of control water swivel.Said environment light sensor 1 is installed and water swivel water nozzle place, and the ambient light intensity that detects the water swivel below changes.Infrared inductor 2 is installed and water swivel base annex or water nozzle places, and whether induction is used has the entering of object (staff) in the zone or leave.
When the user need use water swivel, the user made the surround lighting of water swivel water nozzle below change near water swivel.After environment light sensor 1 detected variable quantity surpassed preset value, infrared inductor 2 was activated or enters into duty from dormant state.When staff gets into the induction region of infrared inductor 2, controller 3 control water swivel valve opening solenoid valve water outlets.When infrared inductor was sensed staff and left, controller 3 control water swivels closed valve seals.Subsequently, infrared inductor 2 is closed or is entered into dormant state from duty.When environment light sensor 1 was judged as low light level state or high light state, infrared inductor was according to the program emission infrared ray of setting before this.
Really, automatic induction system of the present invention and method also can be applicable in other sanitary bath equipments such as urinal, w.c.pan.
In each embodiment of said the present invention, the surveyed area of environment light sensor 1 can with the induction region of infrared inductor 2, according to practical situations, can be identical, also can be different.
In each embodiment of said the present invention, open infrared inductor 2, be meant that letting infrared inductor 2 never work to gets into duty, or enter into duty from dormant state.Here, what need to specify is, infrared inductor 2 also is work in dormant state following time, just infrared emission frequency lower (as: emission in 2 seconds once) under dormant state.In some cases, environment light sensor 1 can because by foreign matter block, object gets into the induction region surround lighting and changes small etc. former thereby can't operate as normal.At this moment; As when being in the infrared inductor 2 of working under the dormant state and having detected object and get into induction region; Can get into normal operating conditions from dormant state; With normal frequency of operation (once) emission infrared ray, and testing result is passed to controller 3 also carry out corresponding operation through controller 3 like emission in 0.3 second.Afterwards or above-mentioned situation recurs twice or repeatedly after, infrared inductor 2 can carry out work with normal operating conditions always.Up to judging normally ambient light of environment light sensor 1, infrared inductor 2 carries out work according to previous program, promptly relies on environment light sensor 1 detected ambient light intensity variable quantity and startup work.Therefore, the present invention also can comprise the disposal route that anti-system can't work, and mainly comprises as follows:
When environment light sensor 1 detected ambient light intensity does not have to change or variable quantity during not greater than preset limit value; And the infrared inductor 2 that is in dormant state has been when having detected object, and infrared inductor 2 carries out work with normal working frequency emission infrared ray.
When above-mentioned situation in the predetermined time limit, recur N (N is more than or equal to 1) inferior after, infrared inductor 2 carries out work with normal working frequency emission infrared ray always.In the present invention one preferred embodiment, N equals 2.It is K that preset ambient light intensity changes limit value.In the present invention one preferred embodiment, said limit value K is 5%.
When judging that environment light sensor 1 ambient light changes and variable quantity during, think that environment light sensor 1 can operate as normal greater than the limit value set.At this moment, infrared inductor 2 carries out work with normal working frequency emission infrared ray no longer always.But, rely on environment light sensor 1 detected ambient light intensity variable quantity and startup work according to original program.
In addition, the infrared inductor 2 in above-mentioned each embodiment, but also can substitute by other inductors of microwave sensor, ultrasonic sensing device or other induction targets things entering induction region.For instance; When using microwave sensor; Environment light sensor senses in the surveyed area that ambient light intensity changes and variable quantity when being higher than preset limit value; Start microwave sensor or make microwave sensor enter into duty from dormant state, whether induction has object to get in the induction region.When not sensed object entering induction region like microwave sensor, dormant state is closed or got into to microwave sensor after opening certain hour (as 2 seconds).After having sensed object and get into or leave induction region like microwave sensor, carry out corresponding operation, for example control the valve opening solenoid valve water outlet of relevant device or close valve seal through controller.Subsequently, dormant state is closed or got into to microwave sensor.
But above-mentioned infrared inductor, microwave sensor, ultrasonic sensing device and other induction targets things get into other inductors of induction region and can be referred to as near inductor.Need to prove that the unlatching of describing in each embodiment among the present invention is meant near inductor: making never works near inductor gets into duty, or enters into duty from dormant state.The light sensor that is used for ambient light can be referred to as environment light sensor like inductors such as photodiode, phototriode or photoresistance.
Variable quantity according to ambient light intensity among the present invention is judged, only compares and judges according to ambient light intensity, and is more reliable.Only whether judge, be easy to cause erroneous judgement disconnected greater than certain value according to ambient light intensity.For example under bright environment, the intensity level that environment light sensor collects is under the state greater than definite value always; Perhaps under darker environment, the intensity level that environment light sensor collects is under the state less than definite value always.Obviously, under above-mentioned state of giving an example, environment light sensor can't operate as normal.And the present invention judges according to the variable quantity of ambient light intensity, can overcome above-mentioned defective, and intelligence is reliable more.Specifically, when the variable quantity of ambient light intensity greater than preset limit value, start and detect near inductor.Further, the present invention judges according to the variable quantity of ambient light intensity value and surround lighting more jointly, then makes the present invention more perfect.Specifically, the variable quantity that is positioned at preset compare threshold interval and ambient light intensity when the ambient light intensity value starts and detects near inductor greater than preset limit value.Really; Under some special situation; The variable quantity that is positioned at preset compare threshold interval and ambient light intensity greater than preset limit value or when the ambient light intensity value when the variable quantity of ambient light intensity is greater than preset limit value, and promptly judging has the people to use equipment between relevant bathroom and kitchen.
Though disclosed embodiment of the present invention above, they are not the limitations of the scope of the invention, know those skilled in the art person the modification and the variation of the above practical implementation is also contained within the scope of the present invention.
Claims (8)
1. an automatic induction method in order to control kitchen or lavatory relevant device, is characterized in that: comprise the steps:
Through environment light sensor timing sampling surround lighting and computing environment light intensity;
When the variable quantity of ambient light intensity greater than preset limit value, open near inductor, whether detect has the user to use kitchen or lavatory relevant device;
When in the judgement time of regulation, when not detected the user and get in the induction region, withdraw near inductor and detect near inductor, carry out the surround lighting collection again;
When in the judgement time of regulation, when having detected the user and get in the induction region, then control corresponding kitchen or lavatory equipment work near inductor, execute associative operation after, withdraw near inductor and detect, carry out the surround lighting collection again.
2. automatic induction method as claimed in claim 1 is characterized in that: said environment light sensor is passive photodiode.
3. automatic induction method as claimed in claim 1 is characterized in that: said is infrared inductor near inductor, comprises to induction region launching the infrared receiver that infrared signal is returned in ultrared infrared emission unit and reception.
4. an automatic induction method in order to control kitchen or lavatory relevant device, is characterized in that: comprise the steps:
Through environment light sensor timing sampling surround lighting and computing environment light intensity;
The variable quantity that is positioned at preset compare threshold interval and ambient light intensity when the ambient light intensity value is opened near inductor greater than preset limit value, and whether detect has the user to use kitchen or lavatory relevant device;
When in the judgement time of regulation, when not detected the user and get in the induction region, withdraw near inductor and detect near inductor, carry out the surround lighting collection again;
When in the judgement time of regulation, when having detected the user and get in the induction region, then control corresponding kitchen or lavatory equipment work near inductor, execute associative operation after, withdraw near inductor and detect, carry out the surround lighting collection again.
5. automatic induction method as claimed in claim 4 is characterized in that: said environment light sensor is passive photodiode.
6. automatic induction method as claimed in claim 4 is characterized in that: said is infrared inductor near inductor, judges with normal working frequency emission infrared light.
7. automatic induction method as claimed in claim 6; It is characterized in that: automatic induction method also comprises low light level state determining step: when ambient light intensity value during less than the interval minimum value of compare threshold; Be judged as low light level state; Carry out infrared judgement, under said low light level state, infrared determination frequency is less than normal working frequency.
8. automatic induction method as claimed in claim 6; It is characterized in that: automatic induction method also comprises high light state determining step: when ambient light intensity value during greater than the interval maximal value of compare threshold; Be judged as the high light state; Carry out infrared judgement, under said high light state, infrared determination frequency is more than or equal to normal working frequency.
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| CN103218587B (en) * | 2013-04-11 | 2016-03-16 | 广东省电信规划设计院有限公司 | Proximity transducer, RFID card reader and close to method for sensing |
| DE102014002686B4 (en) * | 2014-02-28 | 2016-07-21 | Abb Ag | Infrared motion detector |
| CN105357818B (en) * | 2015-11-06 | 2018-03-20 | 海信（山东）空调有限公司 | A kind of line control machine control method |
| CN106597789B (en) | 2016-12-21 | 2019-08-13 | 海信集团有限公司 | The control method and device of laser projection device |
| CN112460742B (en) * | 2020-11-19 | 2021-11-23 | 珠海格力电器股份有限公司 | Control method and device of sensor, storage medium and processor |
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