JP5052425B2 - lighting equipment - Google Patents

Description

  The present invention relates to a lighting apparatus that saves power by turning on a light source for a predetermined lighting time in response to human detection by a human sensor.

  2. Description of the Related Art Conventionally, a lighting fixture with a human sensor has been designed to save power by turning on the illumination for a certain period of time when the presence of a person is detected by the human sensor. In many cases, a pyroelectric infrared sensor (hereinafter referred to as a pyroelectric sensor) is used as a human sensor used in this type of lighting apparatus.

  Since the pyroelectric sensor detects the sensor signal based on the difference before and after the change only when the incident heat dose changes, the sensor signal is not detected when the person is stationary. Therefore, a timer that is triggered when a sensor signal is detected and counts for a certain period of time is used. The lamp is lit while the timer is counting, and the lamp remains lit for a certain period of time even when the person is stationary. I am doing so. In addition, when the sensor signal is detected again during the count, the timer resets the count at that time, thereby extending the count and extending the lighting time.

  By the way, in the illumination control as described above, even if a person passes through the detection area, it is lit for a certain period of time, so that power is wasted, so it is desirable to shorten the lighting holding time. However, when the lighting holding time is shortened, when a person is stationary in the detection area, the person may be turned off (referred to as “lighting off at present”) even if the person stays.

Therefore, human detection during the lighting holding time period is measured, and if the number of occurrences of human detection is large, the lighting holding time is lengthened.If the number of occurrences of human detection is small, the lighting holding time is shortened to save energy. There is known an illuminating device that is designed to prevent attended lights from being turned off (see, for example, Patent Document 1). However, this device increases or decreases the lighting holding time by the number of person detections during the lighting holding time. Therefore, when the lighting holding time is shortened, the count number inevitably decreases, and accurate lighting holding time control becomes difficult. For this reason, in such a conventional lighting fixture, the actual use situation does not match the lighting holding time, and there are cases where the lighting is useless.
JP 2001-85170 A

  The present invention solves the above-mentioned problem, and according to human detection by a human sensor, in a lighting fixture that lights a light source that is determined in advance, an actual use situation and a lighting holding time are determined. An object of the present invention is to provide a lighting apparatus that can be made appropriate and can more reliably save power and prevent light from being turned off.

  In order to achieve the above object, the invention of claim 1 includes a light source, a human sensor, and a control unit that lights the light source for a predetermined lighting holding time according to human detection by the human sensor. The control unit measures a lighting time from when the light source is turned on until the light source is turned off, and a turn-off time from when the light source is turned off to when the light source is turned on for a certain time. The measured lighting time is used as a seating time, and the extinguishing time measured when the light source transitions from the lighting state to the extinguishing state and then enters the lighting state again is shorter than a predetermined time. If it is time, it is assumed that this turn-off time is also present, and it is used as total seating time. The total turn-off time is combined, and the turn-off time regarded as the presence time is subtracted from the measured turn-off time. The total time spent The time ratio between the total seated time and the total absent time within the certain time is obtained, and when the time ratio of the total seated time is higher than a predetermined ratio, the lighting is performed after the start of the measurement for the next certain time. The holding time is lengthened, and when the time ratio is lower than the predetermined ratio, the lighting holding time is shortened.

  According to a second aspect of the present invention, in the lighting apparatus according to the second aspect, the control unit obtains an average value of a maximum value and a minimum value of the total seating time within the predetermined time, and the average value is calculated in advance. When the predetermined value is larger than the predetermined value, the lighting holding time is further lengthened, and when the average value is smaller than the predetermined value, the lighting holding time is further shortened.

  According to the invention of claim 1, when the turn-off time is shorter than the predetermined time, when a person passes through the detection area or is stationary, the short turn-off time is regarded as the seating time. , Can improve the accuracy of the presence time, improve the accuracy of the time ratio of the total absence time to the total absence time, and when this time ratio is high, the lighting holding time of the light source is lengthened, so that It is possible to suppress light extinction at the time expected to stay. In addition, when the time ratio is low, the seating time is short, and the lighting holding time of the light source is shortened, so that power can be saved.

  According to the invention of claim 2, when the average value of the maximum value and the minimum value of the total seating time is larger or smaller than the predetermined value, it is considered that each seating time within a certain time is long or short. Thus, the lighting holding time increased or decreased based on the time ratio can be corrected by making it longer or shorter, so that it is possible to more precisely carry out suppression of light extinction during a person's stay and control of power saving during absence.

  Hereinafter, the lighting fixture 1 which concerns on one Embodiment of this invention is demonstrated with reference to drawings. FIG. 1 shows an electrical configuration of the lighting fixture 1 of the present embodiment. The luminaire 1 includes a human sensor 2 that detects the presence of a person and outputs a sensor signal, a holding time setting unit 3 that receives the sensor signal and sets a predetermined lighting holding time, and the lighting holding time. The control unit 4 that controls the lighting of the lighting unit 5 based on the above, the lighting unit 5 that is controlled to be turned on by the control unit 4, the light source 6 that is driven to be turned on by the lighting unit 5, and a power source that supplies commercial power to these units And a power supply unit 7. The holding time setting unit 3 includes a holding timer 31 that counts down a predetermined lighting holding time, a lighting timer 32 that counts a lighting time from when the light source 6 is turned on until it is turned off, and after the light source 6 is turned off. Stores the extinction timer 33 that counts the extinction time until it is illuminated, the measurement timer 34 that counts a predetermined time for measuring the illumination time and extinction time, and the timer time that each timer 31 to 34 counts Storage unit 35. The storage unit 35 includes a semiconductor storage element such as a flash memory or an EEPROM as a storage medium. As the light source 6, a fluorescent lamp or an LED is preferably used.

  The human sensor 2 can be a pyroelectric sensor, a radio wave sensor such as a millimeter wave, and an imaging device. Here, the pyroelectric sensor is used to detect infrared rays emitted from the human body and output human sensor signals. To do.

  The holding time setting unit 3 is composed of a microcomputer, a logic IC, and the like. When a sensor signal is input from the human sensor 2, the holding time setting unit 3 sets a lighting holding time in the holding timer 31, counts the holding timer time, and When the holding timer 31 starts counting the holding timer time, a lighting instruction signal is output to the control unit 4, and when the holding timer time count ends, a turn-off instruction signal is output.

  The holding timer 31 is constituted by a microcomputer, a logic IC, or the like, starts counting down the holding timer time set together with the sensor signal input, and is reset by the countdown. Further, when the sensor signal is input again during the countdown, the count of the holding timer 31 is reset, and thus the lighting holding time is extended.

  The lighting timer 32 starts counting at the same time as the holding time setting unit 3 outputs a lighting instruction signal to the control unit 4, and then counts the time until the holding time setting unit 3 outputs a turn-off instruction signal to the control unit 4. Then, the lighting time during which the light source 6 is turned on is measured. The lighting timer 32 stores the count value of the lighting time in the storage unit 35 when the counting is completed, and the count is reset.

  The turn-off timer 33 starts counting at the same time as the holding time setting unit 3 outputs a turn-off instruction signal to the control unit 4, and then counts the time until the holding time setting unit 3 outputs a turn-on instruction signal to the control unit 4. Then, the turn-off time during which the light source 6 is turned off is measured. Further, the extinguishing timer 33 stores the count value of the extinguishing time in the storage unit 35 when the count is completed, and the count is reset.

  The measurement timer 34 is a timer for setting a time interval for measuring the turn-on time and the turn-off time, and a predetermined time (here, for example, 10 minutes, 1 hour, 1 day, etc.) is set as the timer time. Count down. The measurement timer 34 starts counting down at the same time as the holding time setting unit 3 issues a lighting instruction signal to the control unit 4, and is reset when counting down for a certain time is completed. At the same time as the counting of the measurement timer 34 is completed, the lighting timer 32 and the extinguishing timer 33 are also terminated, and the lighting time and the extinguishing time measured by the timers 32 and 33 at that time are stored in the storage unit 35. .

  The control unit 4 includes a microcomputer, a logic IC, and the like. The control unit 4 monitors the signal from the holding time setting unit 3, and when the signal is input, controls the lighting unit 5 to light up in a normal state. In addition, when the count signal of the holding timer time is not input, the control unit 4 controls to turn off the lighting output of the lighting unit 5 to turn off the light source 6.

  Further, the control unit 4 sets the lighting time measured by the lighting timer 32 within a certain time as the seating time, and also sets a predetermined threshold Tmin (predetermined time) among each of the lighting times measured by the lighting timer 33. ) Considering the shorter turn-off time as attendance time, the total stay time (Ta) is combined, and the total turn-off time excluding the turn-off time regarded as the attendance time from the measured turn-off time The time (Tb) is stored in the storage unit 35. Further, the control unit 4 calculates a time ratio (Ta / Tb) between the total absence time (Ta) and the total absence time (Tb), and stores the calculated time ratio together with a predetermined ratio. 35. Here, the control unit 4 compares the time ratio with the predetermined ratio. When the time ratio is higher than the predetermined ratio, the lighting holding time is lengthened after the start of the measurement for the next certain time, and the time ratio is the predetermined ratio. When it is lower, the holding timer time of the holding timer 31 is controlled so as to shorten the lighting holding time.

  The lighting unit 5 includes an electronic circuit such as a fluorescent lamp ballast for driving the light source 6 to light. The lighting unit 5 drives the light source 6 to turn on by receiving an on / off signal or a dimming signal for blinking the light source 6 from the control unit 4.

Lighting control based on human detection of the lighting fixture 1 configured as described above will be described with reference to FIGS. 2 and 3. 2A to 2C show time charts of operations when the sensor signal S1 is detected a plurality of times within the lighting holding time Tn. Here, as shown in FIG. 2A, the sensor signal S1 from the human sensor 2 is detected at times t1, t2, t4, and t6, and the sensor signal detected at time t2 is detected at time t1. Is located within the lighting holding time Tn. Time measuring timer 34 at t1, the start counting the timer time of a predetermined time T _0.

  Also, as shown in FIG. 2B, when the holding timer time of the holding timer 31 is set to a predetermined N (seconds) at the time t1, and the holding timer 31 starts counting, a lighting instruction signal is transmitted. At the same time, the lighting timer 32 starts. At this time, the lighting holding time Tn is equivalent to the holding timer time N. When the sensor signal S1 is detected again at time t2 before the countdown of the holding timer 31 started at time t1 is completed, the countdown of the holding timer 31 is reset and the lighting holding time is until t3 (= t2 + Tn). Extend. As a result, as shown in FIG. 2C, the light source 6 is turned on from time t1 to time t3. After that, when the count of the holding timer 31 ends at time t3, a turn-off instruction signal is sent, and this turn-off instruction is sent. The light source 6 is turned off by the signal. At this time, the lighting timer 32 is stopped, the lighting time Tp1 counted by the lighting timer 32 is stored in the storage unit 35, and the counting of the extinguishing timer 33 is started.

Here, the light source 6 is turned off until time t4 after time t3, and when the next sensor signal S1 is detected at time t4, the turn-off timer 33 stops. At this time, the extinguishing time Tr1 (= t4-t3) is measured by the extinguishing timer 33 and stored in the storage unit 35. At the same time, the holding timer 31 is reset, and the countdown is restarted with the holding timer time set to N (seconds). Thereafter, likewise, each time the sensor signal S1 is detected, the lighting of the turn-on duration Tn, repeated subsequent off, until the count is over time tm for a predetermined time T ₀ by the measuring timer 36, the lighting time Tp2, Tp3 and turn-off times Tr2 and Tr3 are measured, respectively. At this time tm, the turn-on timer 32 and the turn-off timer 33 are forcibly terminated, and the last turn-on time or turn-off time of the fixed time T ₀ is stored. Although started simultaneously with input of the first sensor signal S1 to the start of the predetermined time T ₀ (time t1), even earlier than the time t1, it may be slow.

Of the predetermined time is measured in the _{T 0} the extinguishing time Tr1, Tr2, Tr3, the extinguishing time Tr1 is regarded as presence time since held below the threshold value Tmin that is set in advance. That is, the control unit 4 determines that the turn-off time Tr1 is a seating time, thereby setting the seating time Ta1 from the time t1 to the time t5 to a value obtained by adding the turn-off time Tr1 to the lighting time Tp1 + Tp2.

As a result, the total presence time Ta within a certain period of time _{T 0,} the Ta = Ta1 + Ta2 = Tp1 + Tr1 + Tp2 + Tp3. The total total absence time Tb is Tb = Tb1 + Tb2 = Tr2 + Tr3.

  Here, the time of the threshold value Tmin is, for example, relatively high when the person is staying in the lighting state when the holding timer 31 is ended, and then is temporarily turned off, and when the person immediately moves and is detected and turned on again. Short turn-off time. Therefore, the control unit 4 identifies that a person stays in the detection area when the turn-off time is shorter than the threshold value Tmin. Thereby, the calculation accuracy of the total seating time Ta is improved.

Here, the control unit 4, when the time ratio determined based on the total presence time Ta (Ta / Tb) is larger than a predetermined ratio that is determined in advance, a long total attendance time Ta at a certain time T ₀ Assuming that many people pass and stay in the detection area, in the next operation for a certain period T ₀ , the lighting holding time Tn is controlled to be longer to prevent attended lighting. Further, when the time ratio is less than the predetermined ratio, the total presence time Ta shorter, as a small passage and stay human in the detection area, the same next operation for a period of time T _0, shortens the turn-on duration Tn To save power by controlling.

When the time ratio measured every fixed time T ₀ is larger than the predetermined ratio, the holding timer time (N) is corrected for a unit time (for example, x seconds), for example, corrected continuously m times. In such a case, the correction time can be set to m times the unit time. Further, when the measured time ratio is smaller than the predetermined ratio, the holding timer time (N) is corrected so as to decrease by a unit time (for example, y seconds), for example, corrected n times continuously. In this case, the correction time can be n times the unit time.

3A to 3C show time charts of operations when the sensor signal S1 is detected only once within the lighting holding time Tn and the timer 1 is not reset. Here, as shown in FIG. 3A, the sensor signal S1 is detected at times t1, t4, and t6, but is not detected during lighting. Accordingly, as shown in FIG. 3 (b), in a predetermined time T _0, hold timer 31 is not reset within the lighting holding time Tn. Further, as shown in FIG. 3C, the measured extinguishing times Tr2, Tr3, Tr4 are all longer than Tmin.

As a result, the total presence time Ta = Ta3 + Ta4 + Ta2 = Tp4 + Tp2 + Tp3 , and the total absence time Tb = Tb3 + Tb1 + Tb2 = Tr4 + Tr2 + Tr3 in the predetermined time _{T 0.} Both are the measured lighting time and extinguishing time itself.

Even when there is no correction in the total seating time Ta as described above, the lighting holding time Tn can be changed based on the comparison between the time ratio and the predetermined ratio, as described above. It can be set to an appropriate value according to the usage environment (number of users, usage, usage frequency) of the appliance 1. Further, even when the usage environment changes, the holding timer time can be corrected automatically and appropriately without any special setting change by the user. At this time, depending on the usage environment, for example, by changing the value of the predetermined time T ₀ in advance depending on the time zone or date when the traffic is expected to be high or low, the fixed period T ₀ is set when the traffic is high. The response can be quickened by shortening. Further, by increasing the value of the predetermined time T _0, determine the presence time and absence time based on the data of many lighting time measured on and off time, the lighting at the next predetermined time based on the time ratio The holding time Tn can be corrected with high accuracy.

Thus, according to the lighting apparatus 1 of the present embodiment, when the turn-off time is shorter than the threshold value Tmin, the accuracy of the total seating time Ta can be improved by regarding the turn-off time as the seating time. , when the time ratio to the total absence time Tb of the total presence time Ta is higher than the predetermined ratio, because the longer the turn-on duration Tn in the next predetermined time T _0, a time which is expected person is staying Can be suppressed from being turned off. Further, when the time ratio is low, the seating time Ta is short, and the lighting holding time Tn is shortened, so that power can be saved. Thereby, an actual use condition and lighting holding time can be made appropriate, and power saving and prevention of standing-off can be achieved.

  Further, in the above, the lighting holding time Tn is corrected by unit time by comparing the time ratio with the predetermined ratio, and depending on the difference between them (time ratio one predetermined ratio) or (predetermined ratio one hour ratio). Thus, the correction time can be weighted. For example, the lighting holding time Tn is lengthened when the difference is large, and is decreased when the difference is small. Thereby, a suitable holding timer time suitable for the use environment can be set.

  Next, a modification of one embodiment of the present invention will be described with reference to FIG. FIG. 4 shows a configuration of the holding time setting unit 3 in this modification. This modification further includes a detection timer 36 in which the holding time setting unit 3 counts the number of detections of the sensor signal, and the number of detections per unit time of the sensor signal in the measured total seating time Ta is a predetermined number of times. When it is larger, the lighting holding time Tn is lengthened, and when it is less than a predetermined number of times, the lighting holding time Tn is shortened.

Control unit 4 stores the detection frequency of the sensor signals counted by the predetermined time T ₀ within the total presence time measured by Ta and the detection timer 36 in the storage unit 35, the ratio of the detection frequency and the total presence time Ta Obtain the number of detections per unit seated time. When the number of unit detection times is larger than a predetermined number of times, the lighting holding time Tn is lengthened. When the number of unit detection times is smaller than the predetermined number, the lighting holding time Tn is shortened.

  Here, when the time ratio is larger than the predetermined ratio, when the unit detection number is larger than the predetermined number in the state of the long lighting holding time (Tn + α, α is the first correction time), the lighting holding time. Is set to a longer lighting holding time (Tn + α + β) (β is the second correction time), so that it is possible to further suppress the person from turning off the light even when the person is present. When the number of unit detections is smaller than the predetermined number, the lighting holding time is shortened to (Tn + α−β). As a result, the correction of the first correction time α that has gone too far can be corrected. It should be noted that this -β correction may be time-saving or omitted.

  Similarly, when the time ratio is smaller than the predetermined ratio and the unit detection frequency is smaller than the predetermined number in the state of the short lighting holding time (Tn−α), the shorter lighting holding time is further shortened. By setting the holding time (Tn-α-β), more power can be saved. When the number of unit detection times is larger than the predetermined number, the lighting holding time is lengthened to (Tn−α + β). As a result, the first correction time α that has gone too far can be corrected.

  As described above, according to the present modification, when the number of unit detection times is larger or smaller than a predetermined number, each person's seating time is long or short, assuming that the frequency of movement of the person within a certain time is high or low. Can be considered. Thereby, since the lighting holding time Tn increased or decreased based on the time ratio can be corrected by making it longer or shorter, it is possible to finely control the extinction during the stay of the person and the control of power saving during the absence.

  Next, another modification of the present invention will be described. Since this modification is basically the same as that of the embodiment, the drawings are omitted. In this modification, an average value of the maximum value and the minimum value of the total seating time is obtained, and when the average value is larger than a predetermined value, the lighting holding time is further increased, and the average value is determined as the predetermined value. When it is smaller than the value, the lighting holding time is further shortened.

The control unit 4, the individual presence time in the total presence time measured at predetermined time intervals _{T 0} (e.g., Ta1~Ta2, Ta2~Ta4) (see FIGS. 2 and 3, hereinafter the same) each of the Find the average of the maximum and minimum values. At this time, the resulting time average value is greater than a predetermined value, in a continuous long stay in the predetermined time T ₀ is large, a longer turn-on duration Tn. Further, when the obtained average value is smaller than the predetermined value, the lighting holding time Tn is shortened on the assumption that there are few continuous long stays.

  Here, when the time ratio is larger than the predetermined ratio, when the average value is larger than the predetermined value in the state of the long lighting holding time (Tn + α), this lighting holding time is further increased to the lighting holding time (Tn + α + β). Adjust to. As a result, it is possible to further suppress the light from being turned off even when a person is present. When the average value is smaller than the predetermined value, the lighting holding time is shortened to (Tn + α−β). As a result, the first correction time α that has gone too far can be corrected.

  Similarly, when the time ratio is smaller than the predetermined ratio and the average value is smaller than the predetermined value in the shortened lighting holding time (Tn−α) state, the lighting holding time is further shortened ( By adjusting to (Tn-α-β), more power can be saved. When the average value is larger than the predetermined value, the lighting holding time is increased by β to (Tn−α + β). As a result, the correction of the first correction time α that has gone too far can be corrected.

  As described above, according to the present modification, when the average value of the maximum value and the minimum value is larger or smaller than the predetermined value, each individual seating time within a certain time is regarded as long or short. The lighting holding time increased / decreased based on the ratio can be corrected by making it longer or shorter, and the same effect as the modified example can be obtained, and the detection timer 36 (see FIG. 4) is not required, and the cost is reduced.

In addition, this invention is not limited to the structure of said various embodiment, A various deformation | transformation is possible suitably in the range which does not change the meaning of invention. For example, a suitable predetermined value can be stored in advance as the lighting holding time based on the time ratio, and the predetermined value stored corresponding to the obtained time ratio can be changed. In the above-described various embodiments, the predetermined ratio to be compared with the time ratio between the absence time and the absence time is one, but it may be set to a plurality. Further, although the threshold value of the turn-off time is set to one stage of Tmin, it may be set to two or more stages such as Tmin and Tmax. Further, based on the change in time ratio during the measurement of the predetermined time T _0, by changing the time width of the measurement even during a predetermined time T _0, it can be corrected quickly turn-on duration flexibly.

The electric block diagram of the lighting fixture which concerns on one Embodiment of this invention. (A) is a figure which shows the sensor signal containing multiple times of detection within the lighting holding time of the said instrument, (b) is a figure for demonstrating correction | amendment of a seating time when the light extinction time is short, (c) is The figure which shows the lighting output of a light source. (A) is a figure which shows a sensor signal when there is no reset of lighting holding time in the said apparatus, (b) is a figure for demonstrating the seating time when a light extinction time is long, (c) is the lighting output of a light source FIG. The electric block diagram of the holding | maintenance time setting part in the modification of one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lighting fixture 2 Human sensor 3 Holding time setting part 31 Holding timer 32 Light-on timer 33 Light-off timer 34 Measurement timer 35 Memory | storage part 36 Detection timer 4 Control part 6 Light source T ₀ Fixed time Ta Total seating time Ta1-Ta4 Seating time Tb1 to Tb3 absent time Tn lighting holding time Tp1 to Tp4 lighting time Tr1 to Tr4 extinguishing time Tmin threshold (predetermined time)

Claims (2)

In a luminaire comprising a light source, a human sensor, and a lighting holding time of a predetermined light source according to human detection by the human sensor, a control unit that lights the light source,
The controller is
The lighting time from when the light source is turned on until it is turned off, and the turning off time from when the light source is turned off until it is turned on next, are measured for a fixed time,
With the measured lighting time as the seating time,
When the light extinction time measured when the light source transitions from the on state to the off state and then enters the on state again is shorter than a predetermined time, the extinguishing time is also considered to be present. The total seating time,
The total absence time is a time obtained by subtracting the turn-off time regarded as the presence time from the measured turn-off time,
The time ratio between the total seated time and the total absent time within the certain time is obtained, and when the time ratio of the total seated time is higher than a predetermined ratio, the lighting is performed after the start of the measurement for the next certain time. A lighting apparatus characterized by lengthening a holding time and shortening the lighting holding time when the time ratio is lower than the predetermined ratio.   The control unit obtains an average value of the maximum value and the minimum value of the total seating time within the predetermined time, and when the average value is larger than a predetermined value, the lighting holding time is lengthened, The lighting fixture according to claim 1, wherein the lighting holding time is shortened when the average value is smaller than the predetermined value.

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