Embodiment
Below with reference to accompanying drawings, embodiments of the invention are described.
For example, as shown in Figure 1, present embodiment is the wireless transmitter 10 that is fit to be applied to lighting apparatus, and this lighting apparatus will be installed in a plurality of illuminating equipments in places such as each room, corridor and control as control object.Wireless transmitter 10 is installed in a plurality of places.When wireless transmitter 10 senses when having the people to occur in its each sensing region, wireless transmitter 10 is by using the radio communication of infrared ray etc., send the open-interval that is used for opening the start signal of illuminating equipment and being used for the prolongation illuminating equipment to receiver 20 and prolong signal, thus the control illuminating equipment.
Notice that Fig. 1 shows the situation that two wireless transmitter 10a and 10b are installed.Under this Installation Modes, for example, from living room and the dining room combined and kitchen (hereinafter to be referred as " LDK ") when going out by entrance, the wireless transmitter 10a that is installed in the place, corridor senses the someone and occurs as the people.Like this, wireless transmitter 10a sends start signal and prolongs signal, to open the illuminating equipment of LDK, successfully opens the illuminating equipment of porch then.In addition, in Fig. 1, for example, when moving towards LDK as the people enters entrance outside the room after, the wireless transmitter 10b that is installed in the porch senses the someone and occurs.Like this, wireless transmitter 10b sends start signal and prolongs signal, to open the illuminating equipment of entrance, successfully opens the illuminating equipment of LDK then.
As shown in Figure 2, each wireless transmitter 10 includes: power supply 11 provides the driving electric energy; Personage's transducer 12, whether the someone occurs sensing; Lightness transducer 13, the sensitive context lightness; Control unit 14 produces start signal and prolongs signal; Switch 15 is operated based on the start signal that is produced by control unit 14 and prolongation signal; And infrarede emitting diode (LED) 16, the emission infrared ray.
For example, power supply 11 comprises battery.This power supply 11 provides the driving electric energy to above-mentioned wireless transmitter 10.
For example, personage's transducer 12 comprises thermoelectric element etc.Whether the someone occurs the heat ray sensing of the human body institute radiation that personage's transducer 12 occurs in sensing region by sensing.When personage's transducer 12 senses the someone when occurring, provide consequent sensing signal to control unit 14.
For example, lightness transducer 13 comprises phototransistor etc.Lightness transducer 13 sensitive context lightness.When lightness transducer 13 senses lightness when being lower than the predetermined luminance grade, provide consequent sensing signal to control unit 14.
For example, control unit 14 comprises microcomputer etc.Control unit 14 produces start signal based on the sensing signal that provides from personage's transducer 12.In addition, after sending start signal, control unit 14 produces the prolongation signal based on the sensing signal that provides from personage's transducer 12 or based on the sensing signal that provides from personage's transducer 12 and lightness transducer 13 respectively.Particularly, if when lighting apparatus be when no matter how the environment lightness has the people to occur just continuing to open the type of illuminating equipment, 14 of control units produce the prolongation signal based on the sensing signal that provides from personage's transducer 12.In addition, when lighting apparatus is only (for example to be lower than the predetermined luminance grade in the environment lightness, at night etc.) and when just continuing to open the type of illuminating equipment when having the people to occur, control unit 14 produces based on the sensing signal that provides from personage's transducer 12 and lightness transducer 13 respectively and prolongs signal.Then, control unit 14 provides the start signal that produces and prolongs signal to switch 15.
For example, switch 15 comprises the switch element such as transistor.Switch 15 is operated based on the start signal that is produced by control unit 14 and prolongation signal, to open infrared LED 16.
Infrared LED 16 is launched infrared ray after the driving of switch 15, the driving of switch 15 is based on the start signal that is produced by control unit 14 and prolong signal.Like this, infrared LED 16 sends this start signal and this prolongation signal.Each start signal and each the prolongation signal launched by infrared LED 16 arrive receiver 20 by infrared communication, and are used for the control illuminating equipment accordingly.
Above-mentioned wireless transmitter 10 produces start signal and prolongs signal by control unit 14 in the following manner.Like this, even sense simultaneously under the situation that the someone occurs at a plurality of wireless transmitters 10, wireless transmitter 10 also can prevent the interfering with each other of start signal in the receiver 20, and prevents from prolonging in the receiver 20 the interfering with each other of signal.
Particularly, wireless transmitter 10 produces and sends two signals continuously by control unit 14, as start signal.At this moment, wireless transmitter 10 changes in such as 30 milliseconds to 200 milliseconds etc. scheduled time scope randomly from sending first start signal to the time interval that sends second start signal.
In order to describe foregoing in detail, consider following situation: two wireless transmitter 10a and 10b sense the someone simultaneously respectively and occur.In this case, shown in the dotted line part a among Fig. 3, wireless transmitter 10a and 10b sense the someone simultaneously by personage's transducer 12 respectively and occur.Thereafter, wireless transmitter 10a and 10b produce first start signal simultaneously by control unit 14.Thereafter, wireless transmitter 10a and 10b with for example 8 milliseconds time span, send start signal from infrared sensor 16 simultaneously.
After this, the wireless transmitter 10a of one of wireless transmitter produces second start signal from sending after first start signal begins through 80 milliseconds by control unit 14.Then, wireless transmitter 10a sends second start signal by infrared sensor 16 continuously together with first start signal.Simultaneously, wireless transmitter 10b produces second start signal from sending after first start signal begins through 100 milliseconds by control unit 14.Then, wireless transmitter 10b sends second start signal by infrared sensor 16 continuously together with first start signal.
In this case, even receiver 20 can't be identified first start signal that sends respectively from wireless transmitter 10a and 10b, receiver 20 also can receive and identify second start signal that sends respectively from wireless transmitter 10a and 10b definitely.Thus, receiver 20 can be carried out cancellation to first start signal and handle, and can control illuminating equipment based on second start signal.
In addition, shown in the dotted line part b among Fig. 3, each is also for example changing from sending first start signal to sending the time interval that prolongs signal in 5 seconds to 5.5 seconds the scheduled time scope randomly among wireless transmitter 10a and the 10b.
Like this, receiver 20 can receive and identify the prolongation signal that sends respectively from wireless transmitter 10a and 10b definitely.Like this, receiver 20 can prolong signal based on these and controls illuminating equipment.
Notice that can decide in response to the shortest unlatching driving time of illuminating equipment from sending first start signal to sending the time interval that prolongs signal, in each wireless transmitter 10, this shortest unlatching driving time can be set.Particularly, when the shortest unlatching driving time of setting of illuminating equipment is 10 seconds, wireless transmitter 10 will be set in about 5 seconds to 5.5 seconds to sending the time interval that prolongs signal from sending first start signal.Like this, first prolong signal even receiver 20 can't be identified from what wireless transmitter 10a and 10b sent respectively, receiver 20 also can receive and identify definitely from what wireless transmitter 10a and 10b sent respectively and second prolong signal.
Like this, each wireless transmitter 10 sends two start signal at interval continuously with random time.In addition, each wireless transmitter 10 is to send the prolongation signal at interval from sending the random time that first start signal begins.Like this, even wireless transmitter 10 can't use first start signal to communicate, wireless transmitter 10 also can use second start signal definitely and prolong signal and communicate.
Note, though the description with reference to Fig. 3 is 8 milliseconds hypothesis based on each start signal and the time span that prolongs signal, but when each start signal is standard code with the prolongation signal, they are the signals that comprise 48 bits separately, have about 80 milliseconds time span (as shown in Figure 4).State in the use under the situation of standard code, because the time span of a signal is longer, even each radio transmitter 10 sends signal at interval with random time, also occurs overlapping between the start signal easily and prolong overlapping between the signal.
In addition, for example, as shown in Figure 5, because each wireless transmitter 10 sends two start signal, so that the signal that sends is not overlapping with the signal that another wireless transmitter 10 sends, so be necessary to be set at the twice of time span of a signal or longer, for example 160 milliseconds or longer with sending this two start signal time intervals.Thus, bigger up to the time lag of opening illuminating equipment by second start signal when first start signal overlaps each other, and problem that the user is done not feel like oneself can appear in each wireless transmitter 10.
In this case, as shown in Figure 6, wish that each wireless transmitter 10 uses the shortening sign indicating number as each start signal and prolongs signal, time span in the shortening sign indicating number is than the weak point of standard code, for example, be the signal that comprises 5 bits, its time length approximately is 8 milliseconds.As mentioned above, each wireless transmitter 10 all uses and shortens sign indicating number.Like this, wireless transmitter 10 makes overlapping between the start signal and prolongs overlapping difficult generation between the signal.In addition, for example, as shown in Figure 7, in order to send two start signal, so that the signal that sends is not overlapping with the signal that sends from another wireless transmitter 10,10 of each wireless transmitters need be set at least 16 milliseconds with the time interval that sends these two start signal.Like this, even under the situation that first start signal overlaps each other, wireless transmitter 10 also can reduce significantly up to the time lag by second start signal unlatching illuminating equipment, thereby can strengthen user's the sense of security.
In addition, wireless transmitter 10 can increase by two pattern numbers in the time interval between the start signal by using the shortening sign indicating number, thereby can reduce the probability that signal overlaps each other.
Particularly, under the situation of using standard code, in order to make each wireless transmitter 10 send two start signal, and the signal that sends can be not overlapping with the signal of another wireless transmitter 10 transmissions, for example, as shown in Figure 8, be necessary the time interval T from the trailing edge of first start signal to the rising edge of second start signal is set at the time span of a start signal or longer.Therefore, till two start signal transmission end, each wireless transmitter 10 needs the time of at least 240 milliseconds (=80 milliseconds * 3).Here, if from each wireless transmitter 10 sense the someone when occurring to the time lag of opening illuminating equipment be 300 milliseconds or shorter, then can not go wrong in the practical application.Be about 100 milliseconds the time lag up to the unlatching illuminating equipment when in addition, receiving start signal from receiver 20.Therefore, in each wireless transmitter 10, sensing the someone from personage's transducer 12 approximately is 200 milliseconds up to the 16 luminous time lags that allow of infrared LED when occurring.Therefore, under the situation of using standard code, in fact, each wireless transmitter 10 can not send two start signal at interval with random time.
Therefore, wireless transmitter 10 increases by two pattern numbers in the time interval between the start signal by using the shortening sign indicating number.Particularly, when each start signal and the time span that prolongs signal were 8 milliseconds, as shown in Figure 9, for example wireless transmitter 10 can be in 200 milliseconds of times that allow, and sent signal to have 12 patterns to the peaked time interval.Therefore, 10 combination in any that need utilization to select from the combination of 12 patterns in the time interval of wireless transmitter send signal, and wireless transmitter 10 can significantly reduce the probability that signal overlaps each other thus.
As mentioned above, wireless transmitter 10 sends start signal and prolongs signal in response to sense someone's time lag that allows when infrared LED 16 is luminous when occurring from personage's transducer 12, and time span is short as much as possible in each signal.Like this, wireless transmitter 10 can significantly reduce the probability that signal overlaps each other.In addition, this representative can be installed wireless transmitter 10 simultaneously, and its number is corresponding to the pattern number.Therefore, wireless transmitter 10 can enlarge the sensing region of personage's transducer 12, and can improve the degree of freedom of setting sensing region greatly.
As described in detail above, based on the sensing signal that provides from personage's transducer 12, with random time at interval produce and send two start signal by control unit 14 according to each wireless transmitter 10 of the embodiment of the invention.In addition, after sending second start signal, wireless transmitter 10 produces and sends the prolongation signal with from sending the random time interval that first start signal begins based on the sensing signal that provides from personage's transducer 12.
Like this, even sense simultaneously under the situation that the someone occurs at a plurality of wireless transmitters 10, wireless transmitter 10 also can prevent the interfering with each other of start signal in the receiver 20, and can prevent from prolonging the interfering with each other of signal in the receiver 20, thereby suitably controls illuminating equipment.
In addition, in each wireless transmitter 10, control unit 14 decides from sending first start signal to sending the time interval that prolongs signal in response to the shortest unlatching driving time of the illuminating device that can set in wireless transmitter 10.Like this, even receiver 20 can't be identified the first prolongation signal that sends from wireless transmitter 10, receiver 20 also can receive and identify the second prolongation signal that sends from wireless transmitter 10 definitely.
In addition, in each wireless transmitter 10, control unit 14 transmissions are shortened sign indicating number as control signal and prolongation signal, and the time span in the shortening sign indicating number is than the start signal of standard code and the time span weak point of prolongation signal.Like this, wireless transmitter 10 makes overlapping between the start signal and prolongs overlapping difficult generation between the signal.Like this, even under the situation that first start signal overlaps each other, wireless transmitter 10 also can reduce significantly up to the time lag of opening illuminating equipment by second start signal.
In addition, in each wireless transmitter 10, control unit 14 is in response to sense someone's time span that decide start signal and prolong signal the time lag that allows when infrared LED 16 is luminous when occurring from personage's transducer 12.Like this, each wireless transmitter 10 can increase by two pattern numbers in the time interval between the start signal, thereby can reduce the probability that signal overlaps each other.
In addition, each wireless transmitter 10 does not send start signal at interval and prolongs signal with random time, shorten sign indicating number as start signal and prolongation signal but pass through control unit 14 transmissions, the time span in the shortening sign indicating number is than the start signal of standard code and the time span weak point of prolongation signal.Even only take these measures, wireless transmitter 10 also can make overlapping between the start signal and prolong overlapping difficult generation between the signal.Even under the situation that first start signal overlaps each other, wireless transmitter 10 also can reduce significantly up to the time lag of opening illuminating equipment by second start signal.
Notice that above-described embodiment is example of the present invention.Therefore, the invention is not restricted to above-described embodiment.Obviously, even under the situation of using other embodiment except above-described embodiment, under the prerequisite that does not deviate from according to technological thought of the present invention, for design waits, also can there be multiple change.
Commercial Application
According to thermal radiation radio transmitter of the present invention, even sense simultaneously under the situation that the someone occurs at a plurality of wireless transmitters, wireless transmitter also can prevent the interfering with each other of start signal in the receiver, and can prevent from prolonging the interfering with each other of signal in the receiver, thereby suitably control control object.