CN109152161B - Illumination control device and method - Google Patents

Abstract

The illumination control device and method of the present invention perform effective delay control according to the situation in the space. A delay time for delaying lighting and extinguishing control is stored in a storage unit (13) for each time zone, and when at least one of a first change from an occupied state to an unoccupied state and a second change from the unoccupied state to the occupied state is confirmed based on the detected presence/absence state, an illumination control unit (15) acquires a delay time (Td) of a change confirmation time zone corresponding to a change confirmation time (Tc) at which the change is confirmed from the storage unit (13), and performs delay control for controlling lighting and extinguishing of an illumination device (Q) with the arrival of a delay control time (Tw) obtained by adding the delay time (Td) to the change confirmation time (Tc).

Description

Illumination control device and method

Technical Field

The present invention relates to a lighting control technique that controls turning on and off of a plurality of lighting devices provided in a facility.

Background

Conventionally, there has been proposed an illumination control technique for detecting the presence or absence of a person in an illumination area of an illumination device using an infrared detection element such as a thermopile, a thermistor, or a stomaometer, which is called a pyroelectric infrared sensor, and turning on and off the illumination device based on the detection result (for example, see patent document 1). In this lighting control technology, when a person present in a lighting area moves, lighting on or off of a lighting device is controlled based on a result of human detection detected by a change in illuminance or a movement of heat, using a characteristic that a change in illuminance or a movement of heat occurs.

[ Prior art documents ]

[ patent document ]

[ patent document 1 ] Japanese patent laid-open No. 2013 and 093103

Disclosure of Invention

[ problem to be solved by the invention ]

In such an illumination control technique, when the illumination device is turned on or off based on only the result of human detection, for example, when a human is present at the boundary of the illumination area, the human detection result changes in sequence due to the influence of the microsecond motion of the human, and therefore the illumination device may repeatedly blink. When such flickering occurs, not only a sense of discomfort is given to people, but also a cause of shortening the service life of the illumination apparatus.

Conventionally, in the lighting control technology, in order to suppress the occurrence of such flicker, a delay control technology is used. The delay control is to delay turning off of the lighting device by a predetermined delay time from the time when the presence of a person can no longer be detected without turning off the lighting device immediately after the presence of the person is detected and in the case where the presence can no longer be detected.

However, according to such conventional illumination control, for example, when a person walks everywhere in a situation where the number of persons is small in a space such as late night time, the illumination devices in the illumination areas corresponding to the movement paths where the lights are turned off before the turning on of the illumination devices are turned on, and then the turning off of the illumination is delayed by a certain delay time by the delay control. Therefore, even if a person passes through the illumination area, the illumination apparatus unnecessarily continues to be lit, and thus there is a problem in that additional power consumption is generated.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an illumination control technique capable of performing effective delay control in accordance with the situation in a space.

[ MEANS FOR SOLVING PROBLEMS ] A method for producing a semiconductor device

In order to achieve the above object, a lighting control device according to the present invention is a lighting control device that detects a person present in a space as a control target from a thermal image detected from the space, and performs lighting control on lighting equipment provided in the space based on an obtained person detection result, the lighting control device including: a storage unit that stores a delay time for delaying the turning-on/off control for each time zone; a human detection unit that detects a state of presence or absence of a human based on the thermal image; and an illumination control unit that, when at least one of a first change from a presence state to an absence state and a second change from the absence state to the presence state is confirmed based on the detected presence/absence state, acquires a delay time of a change confirmation time period corresponding to a change confirmation time at which the change is confirmed from the storage unit, and performs delay control of turning on or off the illumination device with the delay time delayed from the change confirmation time.

In one configuration example of the illumination control device according to the present invention, the storage unit stores an off delay time and an on delay time as the delay time for each of the time periods, and the illumination control unit acquires the off delay time of the change confirmation time period from the storage unit as the delay time when the first change is confirmed and acquires the on delay time of the change confirmation time period as the delay time when the second change is confirmed.

In one configuration example of the illumination control device according to the present invention, the storage unit stores, for each of the time periods, whether or not control is performed regarding the delay control, the illumination control unit checks, with reference to the storage unit, whether or not the control is performed regarding a time period at a current time when the delay control is performed, performs the delay control when the control is displayed with the delay control, and turns off the illumination device when the control is displayed without the delay control.

In one configuration example of the illumination control device according to the present invention, the delay time is shorter in a time period in which the probability that the space is in an unmanned state is higher.

In one configuration example of the illumination control device according to the present invention, the delay time is shorter as the on delay time used for lighting becomes darker outdoors.

Further, a lighting control method according to the present invention is a lighting control method for detecting a person present in a space as a control target from a thermal image detected from the space and performing lighting control on lighting equipment provided in the space based on an obtained person detection result, the lighting control method including: a storage step in which a storage unit stores a delay time for delaying the turning-on/off control for each time zone; a person detection step in which a person detection unit detects a state of presence or absence of a person based on the thermal image; and an illumination control step in which, when at least one of a first change from a presence state to an absence state and a second change from the absence state to the presence state is confirmed based on the detected presence/absence state, an illumination control unit acquires, from the storage unit, a delay time of a change confirmation time period corresponding to a change confirmation time at which the change is confirmed, and performs delay control of turning on or off the illumination device by delaying the change confirmation time by the delay time.

[ Effect of the invention ]

According to the present invention, the delay time for the delay control, that is, the length of time for delaying the turning on or off is switched according to the change confirmation time period at the change confirmation time at which the presence or absence of the change in the state is confirmed. Therefore, effective delay control corresponding to the case of a space that varies according to the time period becomes possible. Therefore, a shorter delay time can be set for a time period such as a late night time period in which there are few people in the space. Therefore, for example, in the case where a person walks around in such a time period, even if the lighting devices of the respective lighting areas corresponding to the movement paths that were extinguished before that are turned on, they can be immediately extinguished with a shorter delay time, as a result of which unnecessary lighting of the lighting devices can be suppressed, and generation of additional power consumption can be suppressed.

Drawings

Fig. 1 is a block diagram showing a configuration of an illumination control apparatus.

Fig. 2 shows an example of the structure of the delay time information.

Fig. 3 is a flowchart showing the illumination control process.

Detailed Description

Next, an embodiment of the present invention will be described with reference to the drawings.

[ Lighting control device ]

First, the illumination control device 10 of the present embodiment will be described with reference to fig. 1. Fig. 1 is a block diagram showing a configuration of an illumination control apparatus.

The lighting control device 10 is constituted as a whole by an information processing device such as an industrial controller or a server device, detects a person U existing in a space R as a control target based on a thermal image detected by an infrared sensor SP provided in the space R, and controls turning on or off of a lighting apparatus Q provided in the space R based on the obtained person detection result.

The infrared sensor SP is an infrared sensor such as a thermopile array sensor disposed on a ceiling or a wall of the space R, and has a function of detecting a thermal image of the floor of the space R at regular intervals and transmitting the detected thermal image to the lighting control device 10 via the communication line L1.

The lighting apparatus Q is a lighting apparatus such as a fluorescent lamp provided in the ceiling of the space R, and has a function of turning on/off in accordance with lighting control from the lighting control device 10 connected via the communication line L1.

The SP is not particularly limited as long as it is disposed at a position where it can detect a thermal image of the illumination region provided for each illumination apparatus Q, and the positional relationship between the SP and Q is not particularly limited.

The illumination control apparatus 10 includes, as main functional sections, a communication I/F section 11, a thermal image acquisition section 12, a storage section 13, a person detection section 14, and an illumination control section 15. Among these functional units, the thermal image acquisition unit 12, the person detection unit 14, and the illumination control unit 15 are realized by cooperation of a Central Processing Unit (CPU) and a program.

The communication I/F unit 11 has a function of performing data communication with the infrared sensor SP and the lighting apparatus Q via the communication line L1.

The thermal image acquisition unit 12 has a function of acquiring the thermal image from the infrared sensor SP received by the communication I/F unit 11 and storing the thermal image in the storage unit 13.

The storage unit 13 is configured by a storage device such as a hard disk or a semiconductor memory, and has a function of storing various processing information and programs used for lighting control processing in the lighting control device 10. The main processing information stored in the storage unit 13 includes delay time information in addition to the thermal image.

Fig. 2 shows an example of the structure of the delay time information. Here, the control presence or absence Cont of the delay control, the off delay time Tdoff, and the on delay time Tdon are registered as a group for each time slot. The off delay time Tdoff represents a time to delay the turning-off of the lighting apparatus Q, and the on delay time Tdon represents a time to delay the turning-on of the lighting apparatus Q. Further, Tdoff and Tdon may be shared to share one delay time Td.

Fig. 2 shows a setting example in the case where the space R is a living room of an office, for example, for a time period "00: 00-07: 00 "and" 22: 00-24: 00 ", Tdoff is set to 5sec and Tdon is set to 0 sec. Therefore, the lighting device can be turned on immediately as it enters the lighting area and can be turned off quickly as it leaves the lighting area, depending on a dark night condition and few people.

In addition, for the period "07: 00-12: 00 "and" 13: 00-18: 00 ", Tdoff is 60sec, Tdon is 60 sec. Therefore, the delay control with a certain delay time is performed according to the daytime brightness and the situation that many people exist and move, and the frequent turning on and off can be suppressed.

In addition, for the period "18: 00-22: 00 ", Tdoff is set to 30sec and Tdon is set to 10 sec. Therefore, it is possible to quickly light up as entering the illumination area according to the situation where the outside is dark and there are fewer people in the overtime period, and to extinguish with a delay time shorter than the daytime according to the departure from the illumination area.

In addition, for the period "12: 00-13: 00 ", set to Cont without control. Therefore, in the case of a noon break time in which the operation is not performed, the lighting control is stopped, and all the lighting apparatuses Q can be turned off to reduce power consumption.

The human detection section 14 has the following functions: a function of searching for a human region showing the surface temperature of the human U with respect to the temperature distribution obtained from the time-series thermal image stored in the storage unit 13; and detecting a state indicating whether or not one or more persons U exist for each illumination area of the illumination apparatus Q based on the obtained search result, and outputting it as a detection result.

The illumination control unit 15 has the following functions: a function of acquiring a delay time Td of the change confirmation time period Tp corresponding to a change confirmation time Tc of the change in the presence/absence confirmation state, based on the delay time information of the storage unit 13, when the detection result obtained by the person detection unit 14, that is, the state of the presence/absence in the illumination area of the illumination device Q changes; a function of performing delay control to turn on or off the lighting device Q at Td obtained by delaying from Tc; and a function of confirming whether or not control related to the time zone of the current time is performed with reference to the delay time information of the storage unit 13 when delay control is performed, performing delay control when the control is performed and the display is performed, and turning off the lighting device Q without performing delay control when the control is performed and the display is performed.

[ operation of the present embodiment ]

Next, the operation of the illumination control apparatus 10 according to the present embodiment will be described with reference to fig. 3. Fig. 3 is a flowchart showing the illumination control process. Here, a case where the lighting control is performed on any one of the lighting apparatuses Q will be described.

First, the thermal image acquisition unit 12 acquires a new thermal image transmitted from the infrared sensor SP and stores the new thermal image in the storage unit 13 (step 100), and the person detection unit 14 detects the presence or absence of the person U associated with the illumination area of the illumination device Q based on the new thermal image stored in the storage unit 13 (step 101).

Next, the lighting control unit 15 refers to the delay time information in the storage unit 13, and checks whether or not there is control Cont for delay control for the current time zone corresponding to the current time (step 102).

If Cont regarding the current time zone indicates no control (no in step 102), the lighting control unit 15 does not perform lighting control based on the result of human detection, turns off the lighting apparatus Q (step 103), and moves to step 100.

If Cont regarding the current time zone indicates control is present (yes in step 102), the illumination control unit 15 checks whether or not the presence/absence state of the illumination area of the illumination device Q has changed from the previous presence/absence state (step 104), and if the presence/absence state has not changed (no in step 104), returns to step 100.

On the other hand, if there is a change in the presence/absence state (yes in step 104), the lighting control unit 15 checks whether or not the change in the presence/absence state is the first change indicating a change from the presence state to the absence state (step 110).

If the change in the presence/absence state is the first change (step 110: yes), the lighting control unit 15 acquires the off delay time Tdoff regarding the change confirmation time period Tp from the delay time information in the storage unit 13 as the delay time Td (step 111). Then, the lighting control unit 15 calculates the turning-off time Twoff delayed by Tdoff from Tc to Tc + Tdoff (step 112), turns off the lighting apparatus Q with the arrival of Twoff (step 113), and returns to step 100.

If the change in the presence/absence state is the second change indicating a change from the unattended state to the manned state (no in step 110), the lighting control unit 15 acquires the on delay time Tdon with respect to the change confirmation time period Tp from the delay time information in the storage unit 13 as the delay time Td (step 114). Then, the lighting control unit 15 calculates the lighting time Twon delayed by Tdon from Tc to Tc + Tdon (step 115), and turns on the lighting apparatus Q with the arrival of Twon (step 116), and then returns to step 100.

[ Effect of the present embodiment ]

In this way, in the present embodiment, the delay time Td for delaying the lighting and extinguishing control is stored in the storage unit 13 for each time period in advance, and when at least one of the first change from the occupied state to the unoccupied state and the second change from the unoccupied state to the occupied state is confirmed based on the detected presence/absence state, the lighting control unit 15 acquires the delay time Td of the change confirmation time period Tp corresponding to the change confirmation time Tc at which the change is confirmed from the storage unit 13, and performs the delay control of lighting or extinguishing the lighting device Q by delaying the delay time Td from Tc.

Thus, the delay time Td for the delay control, i.e., the time length delayed for turning on or off, is switched according to the change confirmation time period Tp of the change confirmation time Tc for confirming the change in the state of presence or absence. Therefore, effective delay control corresponding to the case of the space R varying according to the time period becomes possible.

Therefore, the shorter delay time Td can be set for a time period such as a late night time period in which the number of people U in the space R is small. Therefore, for example, in the case where a person walks around in such a time period, even if the lighting apparatuses Q of the respective lighting areas corresponding to the movement paths extinguished before that are turned on, they can be immediately turned off with a short delay time, as a result of which unnecessary lighting of the lighting apparatuses Q can be suppressed, and generation of additional power consumption can be suppressed.

In the present embodiment, the off delay time Tdoff and the on delay time Tdon are stored in the storage unit 13 for each time period as the delay time Td, and the illumination control unit 15 may acquire Tdoff of the change confirmation time period Tp as Td from the storage unit 13 when the first change is confirmed, and acquire Tdon of Tp as Td from the storage unit 13 when the second change is confirmed. Thus, different Td can be set for the first variation and the second variation, and flexible delay control can be realized.

In the present embodiment, the storage unit 13 stores the presence or absence of control indicating the presence or absence of the delay control for each time segment, and the lighting control unit 15 may check the presence or absence of control of the change confirmation time segment Tp when the on-off control based on the delay control time Tw is performed, perform the on-off control based on the delay control time Tw when the presence or absence of the display is the delay control, and turn off the lighting apparatus Q when the presence or absence of the display is the no delay control. This makes it possible to easily stop the delay control in an arbitrary time period and reduce power consumption.

In the present embodiment, the higher the probability that the space R is in an unmanned state, the shorter the time length of the delay time Td can be. This enables very effective delay control according to the situation of the space R.

In the present embodiment, the time length of the on delay time Tdon for lighting in the delay time Td can be shortened as the outdoor time zone is darker. Thus, even if the outdoor is dark, the lighting apparatus Q can be immediately turned on according to the movement of the person, and uneasiness due to darkness can be reduced.

[ expansion of embodiment ]

Although the present invention has been described above with reference to the embodiments, the present invention is not limited to the above embodiments. Various modifications which can be understood by those skilled in the art can be made in the structure and details of the present invention within the scope of the present invention. In addition, any combination can be implemented in the respective embodiments within a range not to be contradicted.

In addition, in the present embodiment, a device capable of dimming may be used as the lighting device Q. In this case, the lighting state does not require 100% brightness, and the lighting state may be assigned a medium brightness. In addition, when the lighting control of the lighting device Q is performed by setting the luminance in advance for each time slot in the delay time information of the storage unit 13, the lighting control unit 15 may acquire the luminance corresponding to the time slot from the delay time information to perform the lighting control of the lighting device Q.

Description of the symbols

10 lighting control device, 11 communication I/F section, 12 thermal image acquisition section, 13 storage section, 14 human detection section, 15 lighting control section, SP infrared sensor, Q lighting equipment, R space, U human, L1 communication line, Td delay time, Tdoff off delay time, Tdon on delay time, Tc change confirmation time, Tp change confirmation time, Tw delay control time, Tdoff off extinguishing time, Twon on time, Cont control state.

Claims (5)

1. An illumination control apparatus that detects a person present in a space as a control target from a thermal image detected from the space, and performs on-off control of illumination devices provided in the space based on an obtained person detection result, the illumination control apparatus comprising:

a storage unit that stores a delay time for delaying the turning-on/off control for each time zone;

a human detection unit that detects a state of presence or absence of a human based on the thermal image; and

an illumination control unit that, when at least one of a first change from a manned state to an unmanned state and a second change from the unmanned state to the manned state is confirmed based on the detected presence/absence state, acquires a delay time of a change confirmation time period corresponding to a change confirmation time at which the change is confirmed from the storage unit, and performs delay control of turning on or off the illumination device with the delay time delayed from the change confirmation time,

the delay time is shorter in a time period in which the probability that the space is free of human states is higher.

2. The lighting control device of claim 1,

the storage section stores an off delay time and an on delay time as the delay time for each of the time periods,

the illumination control unit acquires the off delay time of the change confirmation time period from the storage unit as the delay time when the first change is confirmed, and acquires the on delay time of the change confirmation time period as the delay time when the second change is confirmed.

3. The lighting control device according to claim 1 or 2,

the storage unit stores the control on the delay control for each of the time periods,

the lighting control unit checks whether or not the control regarding the time zone at the current time is performed with reference to the storage unit when the delay control is performed, performs the delay control when the control is displayed with the delay control, and turns off the lighting device when the control is displayed without the delay control.

4. The lighting control device of claim 1,

the on delay time used at the time of lighting out of the delay times is a period of time that is darker outdoors, the shorter the time length thereof.

5. A lighting control method that detects a person present in a space as a control target from a thermal image detected from the space, and performs on-off control of lighting devices provided in the space based on an obtained person detection result, the lighting control method comprising:

a storage step in which a storage unit stores a delay time for delaying the turning-on/off control for each time zone;

a person detection step in which a person detection unit detects a state of presence or absence of a person based on the thermal image; and

an illumination control step in which an illumination control unit acquires a delay time of a change confirmation time period corresponding to a change confirmation time at which the change is confirmed from the storage unit when at least one of a first change from the presence state to the absence state and a second change from the absence state to the presence state is confirmed based on the detected presence/absence state, and performs delay control of turning on or off the illumination device with the delay time delayed from the change confirmation time,

the delay time is shorter in a time period in which the probability that the space is free of human states is higher.

Images