JP3509201B2 - Automatic lighting equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic lighting device for automatically detecting a human body or the like.

[0002]

2. Description of the Related Art Conventionally, an automatic lighting device, such as a lighting device installed in a private room such as a toilet, is automatically turned on when a person enters the private room and is automatically turned off when a person leaves the room. As disclosed in Japanese Laid-Open Patent Publication No. 61-77596, at least a sensor for detecting the opening and closing of a door and a sensor for detecting the presence of a person inside the private room are provided. Further, automatic blinking control can be performed by combining a sensor that detects the opening and closing of the door with a timer.

FIG. 8 shows an example of a sensor for detecting the presence of a person (referred to as a distance measuring sensor 1 here).

The distance measuring sensor 1 includes a light emitting section 2 which constantly outputs infrared rays, a light projecting lens 3 which projects infrared rays from the light emitting section 2 onto an object A or B, and infrared rays reflected by the object A or B. A light receiving lens 4 for receiving light, a light receiving section 5 for receiving infrared rays from the object A or the object B through the light receiving lens 4, a light emitting section 2 and a control section 6 for controlling the light receiving section 5,
The infrared light emitted from the light emitting unit 2 is received by the position where it returns to the light receiving unit 5, that is, the infrared light reflected by the object A is received at the position a of the light receiving unit 5, but in the case of the object B, the light receiving unit 5
The distance from the distance measuring sensor 1 to the object A or B is detected by receiving the light at the position b, and the distance from the distance measuring sensor 1 to the object A or B measured as described above is detected. A corresponding signal is input to the comparison circuit unit 7, the comparison circuit unit 7 determines that the object A or B is closer than a predetermined distance, and the signal is transmitted to the lighting circuit unit 8. Lighting circuit section 8
Receives the transmitted signal and controls the lighting of the lighting load 9 (hereinafter referred to as the light source 9).

Another example of an automatic illuminating device equipped with the distance measuring sensor 1 described above is disclosed in, for example, Japanese Patent Application Laid-Open No. 5-242974, and another example of the distance measuring sensor 1 is, for example, Japanese Patent Application Laid-open No. There is one disclosed in Japanese Patent No. 18258, and the distance measuring sensors shown in these two publications do not need to be an object having heat. Therefore, for example, an object other than a person having heat, such as a human being. In addition to being effective, the structure is relatively inexpensive because it is not easily affected by the ambient temperature, and the accuracy of the light receiving element does not need to be high.

Next, a second distance measuring sensor, which does not need to be a substance having heat, is used in a private room such as a toilet.
Conventional examples of the above are shown in FIGS. 9 to 11.

In this conventional example, it is assumed that the human body moves on a substantially straight line, and the distance measuring sensor 1 has a position 11 (a wall portion or a ceiling portion of a private room) facing a door 10 for a person to enter and leave the room. The light source 9 is arranged at a distance L ₀ from the door 10 and is arranged in a direction to detect the door 10.
Is placed on the wall or ceiling of the private room, and the distance between the distance measuring sensor 1 and the human body is shorter than the distance La, or the door 10 is opened (the distance between the distance measuring sensor 1 and the object to be detected is L). _The light source 9 is turned on when the distance is shorter than ₀ , the distance between the distance measuring sensor 1 and the human body is equal to or more than the distance La, and the door 10 is closed (the distance between the distance measuring sensor 1 and the object to be detected is The light source 9 is turned off in a state of becoming L ₀ or more), and the operation will be briefly described with reference to FIGS. 9 to 11 .

First, as shown in FIG. 9, when the human body is outside the private room and the door 10 is closed, the distance measuring sensor 1 detects the door 10 and the distance between the distance measuring sensor 1 and the door 10 is increased. Since La is equal to L ₀ , the light source 9 is off.
As shown in FIG. 10, when the human body is outside the private room and the door 10 is opened, the distance measuring sensor 1 detects the door 10 and the distance Lb between the distance measuring sensor 1 and the door 10 is less than L ₀ . Since it is short, the light source 9 is turned on. Further, as shown in FIG. 11, when the human body is inside the private room and the door 10 is closed, the distance measuring sensor 1 detects a human, and the distance Lc between the distance measuring sensor 1 and the human is less than L ₀ . Since it is short, the light source 9 maintains the lighting state.

[0009]

However, when the first conventional example is used in a private room such as a toilet as shown in FIGS. 9 to 11, a door open / close detection sensor and a human body presence detection sensor are used. 2 sensors are required, resulting in high cost.

In the second conventional example, when the door 10 is inwardly opened as shown in FIG. 10, the opening / closing of the door 10 can be detected to control the lighting of the light source 9. 12
For example, when the door 10 is open as shown in FIG.
Since the distance Ld between the distance measuring sensor 1 and the door 10 or the person at the time of opening is longer than the distance L ₀ , the light source 9 is in the off state, which is inconvenient.

The present invention has been made in view of the above problems. An object of the present invention is to turn on a light source from the time a person opens a door to enter a private room until the person closes the door to exit. The present invention provides an automatic lighting device that can be easily controlled to be in the off state and to be turned off in other states, and can be easily dimmed.

[0012]

In order to solve the above problems, according to the invention of claim 1, a power source, a lighting load, a distance measuring sensor for measuring a distance to a human body or an object, and Private room composed of a comparison circuit section for comparing and outputting the output data of the distance measuring sensor and the prestored reference data, and a lighting circuit section for receiving the output signal of the comparison circuit section and controlling the output of the lighting load Automatic lighting equipment for
The comparison circuit unit is in a mode in which a lighting load is turned off when the output data and the reference data are substantially equal to each other.
Illumination when the output data and the reference data are not equal
It is characterized in that the load is switched to a lighting mode .

According to the invention of claim 2, the reference data is
The data is the initial data of the output data when the power is turned on.
Data, or data set arbitrarily .

According to the invention of claim 3, the comparison time
In the road portion, the output data is substantially constant a plurality of times within a fixed time.
In the case of
Output means of the lighting load by the switching means.
It is characterized by switching the mode .

[0015]

[0016]

[0017]

[0018]

According to the first aspect of the present invention, the distance measuring sensor measures the distance between the distance measuring sensor and the object and outputs the output data.
The data is compared with the reference data stored in the comparison circuit section and output
Turn off the lighting load when the data and the reference data are almost equal
The output data and the reference data
If not equal, switch to a mode in which the lighting load is turned on .

[0019]

According to the second aspect of the present invention, the output data when the power is turned on or the arbitrarily set data is set as the reference data, thereby saving the trouble of storing the reference data in advance. .

According to the third aspect of the invention, when the output data is substantially constant a plurality of times within a constant time, it is judged whether the output data is substantially equal or not, and the lighting load output mode is switched.

[0022]

[0023]

[0024]

【Example】

(Embodiment 1) FIG. 1 is a block diagram of a first embodiment according to the present invention, and FIG. 2 is a flow chart showing the operation of a comparison circuit section 7.
Fig.

The difference from the second conventional example shown in FIGS. 9 to 11 is that the distance L is measured twice within a predetermined time, and the two distance data L are the reference data L ₀ ± α (α Is to be within the measurement error), the comparison circuit unit 7 is operated so as to change the lighting mode from the lighting state to the non-lighting state, and other same configurations are denoted by the same reference numerals. Is omitted.

Next, the operation of the comparison circuit section 7 will be briefly described with reference to FIG. First, the lighting mode is initialized to "off" (shown in FIG. 2), and the lighting mode flag is used to branch between lighting and extinguishing. The distance L is compared with the reference data L ₀ ± α.
(Shown in FIG. 2) At that time, if L ₀ −α ≦ L ≦ L ₀ + α, it is held for a fixed time T (shown in FIG. 2), and the measured distance L and the reference data L ₀ ± α are again set. In comparison, L ₀ −α ≦ L ≦
When L ₀ + α (shown in FIG. 2) holds, the light is turned off. (Shown in FIG. 2) Further, depending on the lighting mode flag, there is a branch between lighting and extinguishing, and in the case of extinguishing, the measured distance L and the reference data L ₀ ± α are compared. (Shown in FIG. 2) At that time, if L ₀ −α ≦ L ≦ L ₀ + α is established, the measurement distance L and the reference data L ₀ ± α are again compared. L ₀
If −α ≦ L ≦ L ₀ + α is not established, the light is turned on (see FIG. 2).
Shown in. ) Change the lighting mode to "lighting" and change the lighting mode.
The flag returns to the place where the light is turned on and the light is turned off. (Returning to FIG. 2.) Here, the infrared rays emitted from the distance measuring sensor 1 are emitted at the moment when a person passes through the entrance of the private room when entering or leaving the room, or when a person enters the room and proceeds through the private room. In order to prevent flicker of the light source due to the fact that L ₀ −α ≦ L ≦ L ₀ + α is temporarily established by blocking or detecting opening / closing of the door,
Measure the distance L twice. Furthermore, although the human is delayed from changing to off state only for a predetermined time T after leaving, the effect of the present invention is not changed by shortening the setting of the predetermined time T.

(Embodiment 2) FIG. 3 is a flow chart showing the operation of the comparison circuit section 7 of the second embodiment according to the present invention.

The difference from the first embodiment shown in FIG. 2 is that instead of the extinguishing mode, a dimming lighting mode (here, a dark lighting mode is used).
Called Do. ) Is used to measure the distance between the door and the distance measuring sensor 1 immediately after the power is turned on when the door is closed and the room is empty, and the distance is set as the reference data L ₀ .
The block diagram is the same as in FIG.

Next, the operation of the comparison circuit section 7 will be briefly described with reference to FIG. First, in the dark lighting mode when the power is turned on (shown in FIG. 3 (1)), the distance between the door and the distance measuring sensor 1 is measured (shown in FIG. 3 (2)), and the distance is measured. The data is stored as the reference data L0. (Shown in FIG. 3 (3).) Then, the measured distance L and the reference data L0 ± α are compared, and at that time, L0−α ≦ L ≦ L0 + α (shown in FIG. 3 (4)) is established. If not, it will be brightly lit. (Shown in Fig. 3 (5).) Once established, the measurement distance L and the reference data L0 ±
Compare with α. (Indicated in FIG. 3 (4).) In the dark lighting state, the measured distance L is compared with the reference data L0 ± α, and at that time, L0−α ≦ L ≦ L0 + α (see FIG. 3 (4)). (Shown) is established, it becomes a dark lighting state. (Shown in Figure 3 (6).)
If not, the measurement distance L and the reference data L0 ± α
Compare with. (Shown in Fig. 3 (5).) After the power is turned on, the reference data L is previously set by repeating the above operation.
It is not necessary to store 0 in the comparison circuit unit 7. In this embodiment, the reference data L0 is stored in the comparison circuit unit 7 when the power is turned on, but the value of the reference data L0 may be set separately. In that case, A in FIG. In this case, the value of the reference data L0 may be set (Reference Example 1). Reference Example 1 is shown in FIG.

In the reference example 1 , the distance measuring sensor 1 is installed on the lower surface of the hanging type lighting fixture 11 from the ceiling 10, and the irradiation surface 13 of the table 12 and the distance measuring sensor arranged directly under the lighting fixture 11. By measuring the height L with the lighting fixture 1,
A light source such as a fluorescent lamp 14 provided inside 1 is dimming controlled so that the illuminance of the irradiation surface 13 is always constant. That is, since the illuminance on the irradiation surface 13 is inversely proportional to the square of the distance L, the light output x1 of the fluorescent lamp 14 at the height of the distance L1 with respect to the light output x of the fluorescent lamp 14 at the height L is: The dimming control is performed so that x1 = x × L1 2 × L2.

[0031] Figure 5 a side view of Reference Example 2 Reference Example 2, the operation waveform diagram in FIG. 6, flow showing the operation of the comparator circuit 7 - shows the door in FIG. 9 - tea.

Reference Example 2 uses the second embodiment shown in FIG. 3 for a stand lighting fixture 17 having, for example, an incandescent lamp 16 as a light source 15, and a distance measuring device installed below the stand lighting fixture 17. The distance L2 between the distance measuring sensor 1 and the hand is measured by holding a human hand or the like directly under the sensor 1, and dimming control of the incandescent lamp 16 is performed. The time to hold a hand or the like is measured to switch between lighting maintenance and dimming control.

Next, the operation will be briefly described with reference to FIG. Since the hand is not moved from time A to time B (time t ₁ ), the distance L ₂ is substantially constant, but time t ₁ is from time A to time C (reference time T _{1 in the} lighting maintaining mode). Light output x ₁ of the incandescent lamp 16 at time A because it is shorter than
To maintain. The distance L ₂ is substantially constant from time D to time F (time t ₂ ), but time t ₂ is from time D to time E.
Since it is longer than (reference time T ₁ ), the lighting maintaining mode is changed to the dimming level setting mode from time E. Although the distance L ₂ changes by moving the hand from time F to time H, the light output of the incandescent lamp 16 is x ₁ according to the distance L _2.
→ x ₂ → x ₃ Time H to time I (time t
_{Since the} hand is not moved up to ₃ ), the distance L ₂ is substantially constant, but the time t ₃ is from time H to time J (dimming level setting mode).
Since the dimming level setting mode is maintained because it is shorter than the reference time T ₂ in the mode), the light of the incandescent lamp 16 is changed by changing the distance L ₂ between the dimming level setting modes. The output can change. Since the distance L ₂ is changed from time I to time J, the light output of the incandescent lamp 16 changes from x ₃ to x ₄ . Since the hand is not moved from the time J to the time L (time t ₄ ), the distance L ₂ is substantially constant, and since the time t ₄ is longer than the reference time T ₂ (time J to time K), the dimming level setting mode is set. Change from lighting mode to lighting maintenance mode. At time M, the light output x ₄ of the incandescent lamp 16 is maintained even if the hand is moved out of the position directly below the distance measuring sensor 1. The operation described above is briefly shown in the flowchart of FIG. 6, and the description thereof is omitted.

With this configuration, for example, a volume dial for setting the dimming level is not needed, and the degree of freedom in designing the stand lighting fixture is increased. In addition, by providing the reference time, it is possible to prevent malfunctions, for example, by detecting insects passing directly under the stand lighting fixture.

Further , the distance measuring sensor 1 in the first and second embodiments is a shear which outputs, for example, 8-bit data.
GP2D05 manufactured by B. Inc., and the comparison circuit unit 7 may be, for example, a one-chip microcomputer having an 8-bit input port and two 1-bit output ports.
The lighting circuit unit 8 may be means for turning on / off the power supply from the commercial power source to the light source 9, which is composed of, for example, a thyristor or a relay.

[0036]

According to the first aspect of the present invention, it is possible to provide an automatic lighting device for a private room in which the output mode of the lighting load can be switched by moving the position of a person or an object.

[0037]

According to the second aspect of the invention, the reference data is set in advance.
It is possible to provide an automatic lighting device for a private room that does not require the trouble of storing the data in the comparison circuit unit .

According to the third aspect of the invention, when the output data is substantially constant a plurality of times within a certain period of time, the output mode of the illumination load is switched depending on whether the output data is substantially equal or not. Thus, it is possible to prevent a malfunction of switching the output of the lighting equipment.

[0040]

[0041]

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment according to the present invention.

FIG. 2 is a diagram showing a flow chart according to the embodiment.

FIG. 3 is a diagram showing a flow chart of a second embodiment according to the present invention.

FIG. 4 is a schematic side view showing Reference Example 1 .

5 is a schematic side view showing Reference Example 2. FIG.

FIG. 6 is a diagram showing operation waveforms according to the reference example .

FIG. 7 is a diagram showing a flow chart according to the reference example .

FIG. 8 is a block diagram showing a first conventional example according to the present invention.

FIG. 9 is a first schematic diagram showing a second conventional example according to the present invention.

FIG. 10 is a second schematic diagram according to the conventional example.

FIG. 11 is a third schematic diagram according to the conventional example.

FIG. 12 is a fourth schematic diagram according to the conventional example.

[Explanation of symbols]

1 ranging sensor 7 Comparison circuit section 8 Lighting circuit section 9 Lighting load

Claims (3)

(57) [Claims] 1. A power supply, a lighting load, a distance measuring sensor for measuring a distance to a human body or an object, and a comparison circuit section for comparing and outputting output data of the distance measuring sensor and reference data stored in advance. And a lighting circuit unit that receives the output signal of the comparison circuit unit and controls the output of the lighting load.
In automatic lighting system for private, the comparing circuit, the
If the output data and the reference data are approximately equal, the illumination
Set the output data and the reference data to the mode to turn off the load.
Mode to turn on the lighting load when the data is not equal
An automatic lighting device for a private room , characterized by being switched to . 2. The reference data is before the power is turned on.
Initial data of output data, or set arbitrarily
The automatic lighting device for a private room according to claim 1, which is data . 3. The output data of the comparison circuit unit is equal to
If the above is approximately equal when the number of times is approximately constant within a fixed time,
By the means for switching when it judges that they are not equal
3. The automatic lighting device for a private room according to claim 1, wherein the output mode of the lighting load is switched .