JP3508442B2 - Hot wire automatic switch - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat ray type automatic switch for detecting the heat ray radiated from a human body to determine the presence or absence of a person and automatically turning on / off a lighting load. .

[0002]

2. Description of the Related Art Conventionally, heat rays from the human body (far infrared rays)
There is provided a heat ray type automatic switch that receives light from a heat ray sensor and turns on and off the illumination load based on a change in heat dose.

[0003]

By the way, in the conventional hot wire type automatic switch, only the instruction to turn on and off the illumination load is given, and the illumination load is turned off when no person is present in the predetermined detection area. It has become. However, when used for gate lights, stair lights, corridor lights, etc.,
You may want to keep the lighting load on for the purpose of ensuring safety. In addition, even when the lighting is used for other purposes, it is sometimes desired to secure the light to the extent that it is possible to confirm what is present in the surroundings, instead of completely turning off the lighting load when there is no person.

The present invention has been made in view of the above circumstances, and an object thereof is to turn on an illumination load with a low light output even when a person does not exist in the detection area, thereby providing a function as a night light and its surroundings. It is an object to provide a hot-wire automatic switch that controls a lighting load so as to have a function of ensuring a light that can confirm existing things.

[0005]

According to a first aspect of the present invention, there is provided a heat ray sensor for detecting a heat ray emitted from a human body, and a detection signal for detecting the presence of a person in a predetermined detection area based on the output of the heat ray sensor. The human detection means that generates the ambient light, the brightness sensor that detects the ambient brightness, the timer means that times a predetermined holding time for each generation of the detection signal, and the ambient brightness detected by the brightness sensor are defined. If the detection signal is generated during the period from the lighting value below the lighting value to the lighting value above the specified extinguishing value, the lighting load is turned on at the specified light output and the light output of the lighting load is changed when the holding time expires. Lighting control means for reducing the state before the detection signal is generated, and for turning off the lighting load regardless of the presence or absence of the detection signal during the period from when the ambient brightness is equal to or higher than the turn-off value to when it is equal to or lower than the turn-on value. The lighting control means includes a lighting load holding time during a period from when the ambient brightness detected by the brightness sensor is equal to or lower than the lighting value to when it is equal to or higher than the extinction value and excluding the holding time. The light is dimmed with less light output. According to this configuration, during the period from when the ambient brightness is below the lighting value to above the extinguishing value, the dimmed light is turned on even when no person is detected, so it can function as a night light. In places where it is desirable to keep the lights on even when there are no people, such as staircase lights and corridor lights, it is possible to combine the functions of the main lighting and the night lighting with one lighting load.

According to a second aspect of the present invention, a heat ray sensor for detecting a heat ray emitted from a human body, and a person detecting means for generating a detection signal when detecting the presence of a person in a predetermined detection area based on the output of the heat ray sensor. A timer means for timing a predetermined holding time each time a detection signal is generated, and lighting the lighting load with a predetermined light output when the detection signal is generated, and generating a detection signal of the light output of the lighting load when the holding time expires. Lighting control means for reducing the state to the previous state is provided, and the lighting control means dims the lighting load with a light output less than the holding time during the period excluding the holding time. According to this configuration, since the lighting load is dimmed and turned on even when the presence of a person is not detected, it is possible to confirm what is present at the location illuminated by the lighting load, and
When a person approaches, the light output of the lighting load increases and it becomes possible to see it better. Therefore, it can be used in applications such as illuminating the surroundings of an exhibit at a low illumination level in a museum, a museum, or various exhibition halls so that the required illumination level can be obtained when a person approaches. In addition to the effect, it also saves power.

According to a third aspect of the present invention, in the first aspect of the present invention, even if the lighting value is turned on when the lighting value and the extinguishing value are equal to or less than the lighting value and the lighting load is turned on, the surrounding brightness is equal to or more than the extinction value. It is set so that it does not become. By setting the lighting value and the extinguishing value in such a relationship, it is possible to prevent a malfunction due to lighting of the lighting load. According to the invention of claim 4, in the invention of claim 1, an external switch for instructing the lighting control device to reduce the light output of the lighting load during lighting to shift to the forced dimming mode can be connected. is there. According to this configuration, even when the dimming lighting is used as the night light, the lighting load can be turned off or the light output can be turned on by operating the external switch during the night when there is little traffic, which is wasteful. It becomes possible to suppress power consumption.

According to a fifth aspect of the present invention, in the first aspect of the invention, a predetermined operation effective time is timed after the ambient brightness detected by the brightness sensor becomes equal to or less than the lighting value.
The timer means is provided, and the lighting control means is shifted to the forced dimming mode in which the light output is further reduced when compared with the dimmed lighting state when the operation effective time expires. With this configuration, useless power consumption can be suppressed as in the case of the external switch, and the forced dimming mode is automatically entered, so the operation of the external switch becomes unnecessary.

According to a sixth aspect of the present invention, in the first aspect of the present invention, a clock means for counting a preset switching time is provided, and when the lighting control means comes to the switching time, the light output of the lighting load is dimmed and turned on. The forced dimming mode is further reduced. With this configuration, useless power consumption can be suppressed as in the case of the external switch, and the forced dimming mode is automatically entered, so the operation of the external switch becomes unnecessary. Moreover, the switching time can be set to a desired time without being influenced by the fluctuation of the sunset time depending on the season.

According to a seventh aspect of the invention, in the invention of the fourth to sixth aspects, the illumination load is turned off in the forced dimming mode. With this configuration, power consumption can be suppressed by turning off the illumination load in the forced dimming mode. According to an eighth aspect of the present invention, in the fourth to sixth aspects of the invention, when the detection signal is generated during the forced dimming mode, the lighting load is turned on for a holding time with a larger light output than before the generation of the detection signal. Is.
With this configuration, even when the lighting load is turned off in the forced dimming mode or is lighting with a low light output, the lighting load can be automatically turned on with an appropriate light output when a person is detected.

According to a ninth aspect of the present invention, in the fourth to sixth aspects of the invention, the forced dimming mode is canceled when the ambient brightness detected by the brightness sensor is equal to or higher than the extinction value. According to this configuration, the forced dimming mode is automatically released when the surroundings become bright as at dawn, and a special operation is not required to release the forced dimming mode, which is highly convenient.

According to a tenth aspect of the present invention, in the first or second aspect of the invention, a light amount setting means for setting the light output when the illumination load is dimmed and turned on is provided. With this configuration, the light output during dimming lighting can be set according to the specifications of the lighting load and the installation environment. Claim 11
In the invention of claim 1, in the invention of claim 1, when the ambient brightness becomes less than or equal to the lighting value and the lighting load starts dimming lighting, a value brighter than the surrounding brightness output by the brightness sensor by a predetermined value. Is provided as an extinguishing value. According to this configuration, the extinguishing value can be automatically set, and further, the optimal extinguishing value can be set according to the specifications of the lighting load, the installation conditions, and the like. In other words, depending on the specifications of the lighting load and the installation conditions, it is possible to set a turn-off value that is as close as possible to the lighting value. Even during dimming lighting, turn off the lighting load early at dawn. As a result, wasteful power consumption can be suppressed.

According to a twelfth aspect of the present invention, according to the first or second aspect of the invention, at least a heat ray sensor and a person detecting means can be connected to a slave unit which generates a detection signal when the presence of a person is detected. Is. According to this configuration, since the detection area can be formed using a plurality of heat ray sensors, it is possible to set a wide detection area or a detection area having a complicated shape.

[0014]

DETAILED DESCRIPTION OF THE INVENTION

(Embodiment 1) In this embodiment, as shown in FIG. 1A, a pyroelectric infrared sensor (hereinafter referred to as a pyroelectric sensor) 1 is used as a heat ray sensor for detecting a heat ray from a human body. The output of 1 is amplified by the amplifying unit 11 and then input to the microcomputer 2. The microcomputer 2 A / D-converts the output of the amplification unit 11, and further determines the presence or absence of a person in a preset detection area based on the output value of the pyroelectric sensor 1. Here, the detection area is a lens arranged in the path of incidence of heat rays to the pyroelectric sensor 1,
It is set by an optical element such as a mirror or a light shielding plate. Inside the microcomputer 2, when it is determined that a person exists in the detection area based on the output of the pyroelectric sensor 1, a detection signal is generated.

The microcomputer 2 is also connected to a brightness sensor 3 which detects ambient brightness using CdS or the like. The output of the brightness sensor 3 is A / D converted, and the ambient brightness detected by the brightness sensor 3 is compared with the extinguishing value and the lighting value set by the operation illuminance adjusting unit 4. The turn-off value is set to be several times (about four times) the turn-on value.
Here, a period from when the ambient brightness detected by the brightness sensor 3 is equal to or lower than the lighting value to when it is equal to or higher than the extinction value is a dark period, and a period when it is equal to or higher than the extinction value and equal to or lower than the illumination value. Will be called the light period. That is, the extinguishing value is set to the ambient brightness when illumination is no longer needed at dawn, and the lighting value is set to the ambient brightness when illumination is required in the evening, for example. . The operating illuminance adjusting unit 4 is composed of a changeover switch or a variable resistor, and adjusts the extinguishing value and the lighting value stepwise or continuously. The turn-off value and the turn-on value may be set individually, but since the setting operation is troublesome, the set-up operation is performed such that the turn-off value and the turn-on value maintain a constant difference or a constant magnification.

The microcomputer 2 has a function of turning on / off the bidirectional three-terminal thyristor (triac) 13 via the drive unit 12. This triac 13
Between the power supply terminals F ₁₁ and F ₁₂ that connect the commercial power supply AC and the load terminals F ₁₃ and F ₁₄ that connect the lighting load 5 (power supply terminal F ₁₁
And the load terminal F ₁₄ ) and the microcomputer 2 controls the conduction angle to adjust the power supplied to the lighting load 5 and change the light output. Here, lighting load 5
Although the case where the power supplied to the incandescent light bulb is controlled by the triac 13 is illustrated, the discharge lamp can be used as the illumination load 5 if a required lighting circuit is provided.

By the way, the most basic operation of the microcomputer 2 is in a period from when the ambient brightness detected by the brightness sensor 3 becomes equal to or lower than the lighting value to becomes equal to or higher than the extinction value, that is, in a dark period. Pyroelectric sensor 1
When a person is detected based on a change in the heat dose incident on (that is, when a detection signal is generated), the lighting load 5 is turned on, and the lighting load 5 is turned on by the microcomputer 2. Timed by the timer means provided. In the bright period, the pyroelectric sensor 1
The illumination load 5 is kept in the off state regardless of whether or not a person is detected by.

The timer means limits the predetermined holding time and the advance notice time shorter than the holding time each time the detection signal is generated, and is re-triggerable. That is, if the detection signal is generated before the holding time expires,
Since the time limit between the notice time and the hold time is redone, the notice time expires after the notice time elapses from the latest detection signal, and if the detection signal does not occur after the notice time expires, the hold time elapses. The holding time has expired. The notice time and the holding time are the operation holding time setting unit 14
The operation holding time setting unit 14 is composed of a changeover switch or a variable resistor. The operation holding time setting unit 14 sets two types of time, a notice time and a hold time. Generally, since the time difference between the notice time and the hold time may be a constant time of about several seconds, the time difference is fixed and one operation is performed. Both times can be set in the department.

In the present embodiment, the lighting load 5 can be turned on or off regardless of the output of the pyroelectric sensor 1, and it can be turned on or off in conjunction with the output of the pyroelectric sensor 1. An operation changeover switch 15 for selecting whether to turn off or to turn off the light is also provided. Further, an operation indicator lamp 16 including a light emitting diode for indicating whether or not a detection signal is generated is also provided. The power supply of the internal circuit is obtained by the stabilized DC power supply 17 which receives the commercial power supply AC connected to the power supply terminals F ₁₁ and F ₁₂ and outputs a constant DC voltage.
The microcomputer 2 is also connected to a reset circuit 18 which is an integrated circuit for resetting when the power is turned on.

As is clear from the above description, a person detecting means for generating a detection signal when it is determined that a person exists in the detection area based on the output of the pyroelectric sensor 1, a timer means for limiting the holding time, The lighting control means for controlling the lighting state of the lighting load 5 is realized by the microcomputer 2. Next, the operation of the circuit shown in FIG. 1A will be described.
In the present embodiment, the lighting load 5 is maintained in the off state regardless of the presence or absence of the detection signal in the bright period Pb (FIG. 1B), such as daytime, when the surroundings are bright.
As shown in FIG. 1B, during a dark period Pd where the surroundings are dark, such as at night, when a detection signal generated by a person's detection is generated at time t ₁ , the lighting load 5 is turned on (generally, rated lighting). .

After that, at the time t after the lighting load 5 is turned on.
_{When the} notice time T ₁ expires in ₃ , the optical output is 50%.
The light is dimmed and the notice is dimmed. This is for the purpose of warning the expiration of the retention time T _2, the lighting load 5 and the holding time T ₂ expires at time t ₄ will be further dimmed. However, as described above, the timer means is because it is Ritorigaraburu, when the detected signal during the holding time T ₂ (actually the period of time t ₂ ~ time t ₄ has) occurs, the lighting load 5 is full lighting, If there is no detection signal during the subsequent notice time T ₁ , the notice is dimmed after the notice time T ₁ expires. As a result, if a detection signal is generated during the period when the lighting load 5 is fully lit, the state of full lighting is extended by the notice time T ₁ minutes, and is detected during the period when the lighting load 5 is the notice dimming. If a signal is generated, it will return to the state of full lighting. In short, from the expiration of the notice time T _{1 to} the expiration of the holding time T ₂ , it is announced by the notice dimming that the lighting load 5 will be extinguished soon. Therefore, if a person in the detection area moves during this period, the lighting load 5 will be reduced. The lighting state of will be maintained. In this way, it is possible to prevent the lighting load 5 from being suddenly turned off, for example, when using the toilet or standing up. Further, if it is desired to maintain the lighting state of the lighting load 5, a detection signal is generated if the lighting load 5 moves within the detection area during the notice dimming, and the lighting load 5 is kept lighting.

By the way, in the present embodiment, as shown in FIG. 1B, the lighting load 5 is turned on with a predetermined light output even if a detection signal is not generated during the dark period Pd. The light output of the illumination load 5 at all times during the dark period Pd is set to, for example, 15% of the total lighting. With such an operation, the lighting load 5 can be kept dimmed as a night light even at night, and the lighting load 5 can be fully turned on only when a person approaches. In other words, it is possible to reduce the power consumption as compared with the case where all the lights are turned on without becoming dark even at night.

That is, the lighting load 5 is turned off in the bright period Pb such as daytime, and in the dark period Pd such as night, when the brightness becomes equal to or less than the lighting value at time t ₀ , the light output is reduced by 15%. It lights up. Further, when a person is detected during the dimming lighting period and a detection signal is generated at time t ₁ , all the light outputs of the lighting load 5 are turned on, and thereafter, when the notice time T ₁ elapses and time t ₃ is reached, 50 The light output of% dims the notice in advance.
Further, at the time t ₄ after the holding time T ₂ has passed, 15%
Return to the optical output of. In other words, one lighting load 5 makes it possible to provide a gate light, a corridor light, and the like with two functions of a main light and a night light.

By the way, in the present embodiment, the dark period
Since the lighting load 5 is turned on in Pd, it is turned on and turned off.
Value and L respectively₁, L₂If so, the brightness sensor 3
The detected ambient brightness changes as shown in Fig. 2 (a).
Will be changed. That is, the ambient brightness is the lighting value L₂
When it goes down to the dark period Pd, the lighting load 5 is turned on.
That will increase the brightness. However, the light-off value L₁
Is the lighting value L₂Is set high enough for
(For example, the turn-off value L₁80 lux, lighting value L ₁2
Set to 0 lux), and the brightness is off value L₁Over
However, the dark period Pd can be maintained. This
As described above, in order to maintain the dark period Pd, the lighting load 5 is turned on.
Light-off value L in consideration of the change in brightness₁And lighting value L₂When
It is necessary to set the difference between the
Light-off value L to accommodate changes in installation conditions, etc.₁And points
Light value L₂The difference between the
ing. Thus, the extinguishing value L₁And lighting value L₂Difference from
By taking it large enough, it becomes dark period Pd
Even if the light load 5 is turned on, the brightness is turned off L₁Lighting beyond
It is possible to avoid the inconvenience that the load 5 turns off again.
it can.

However, since the extinguishing value L ₁ needs to be set to a large value, the extinguishing of the lighting load 5 may be delayed and power may be wastefully consumed. Therefore, the brightness at the time when the lighting load 5 is turned on at the start of the dark period Pd is stored in the microcomputer 2, and as shown in FIG.
It is desirable to automatically set the value obtained by adding the required margin M to the stored brightness as the light-off value L ₁ . With this configuration, if only the lighting value L ₂ is set, the turning-off value L ₁ is automatically set according to the specifications of the lighting load 5 and the installation conditions, and the difference between the turning-off value L ₁ and the lighting value L ₂ is set. It is possible to set the extinguishing value L ₁ as dark as possible without having to allow a margin. As a result, lighting load 5 at dawn
It is possible to advance the time when the light is turned off, and as a result, it is possible to suppress unnecessary power consumption.

In the above example, the light output of the lighting load 5 is 15
%, 50%, and 100% (rated lighting) are switched, but this is an example, and each value of the light output is appropriately selected as necessary. Further, the reason why the total lighting is changed from 50% lighting to 50% lighting at the expiration of the notice time T ₁ is to make sure that the notice is recognized with a light amount difference that can be visually sufficiently recognized, and not necessarily. It does not have to be 50%. Similarly, when the lighting load 5 is turned on, the light output may be set to an appropriate light output instead of 100% lighting.

By the way, the above-mentioned heat wire type automatic switch Y is used.
Are configured to be mounted on the ceiling and arranged in parallel with the lighting load 5, as shown in FIG. This is to make the detection area substantially coincide with the light irradiation range of the illumination load 5. Specifically, by using a case 20 as shown in FIG. 4, it can be attached to the ceiling. Case 2
Reference numeral 0 includes a disk-shaped case body 21 and a cover 22 coupled to the central portion of the upper surface of the case body 21. An annular surrounding wall 21a is formed at the center of the upper surface of the case body 21,
Four connecting pieces 21b are erected on the upper edge of the surrounding wall 21a. A coupling hole 21c is formed in each of the coupling pieces 21b, and the cover 22 is coupled to the case body 21 by engaging the coupling hole 21c with the coupling projection 22a protruding from the side surface of the cover 22. The side surface of the cover 22 is formed with a groove portion 22b that fits into the coupling piece 21b, and the cover 2 is provided in a state where the coupling protrusion 22a is engaged with the coupling hole 21c in an uneven manner.
The side surface of 2 and the connecting piece 21b are substantially flush with each other.

The case 20 is fixed to the ceiling by using a pair of fittings 30 connected to the case 20 or by using a box screw screwed into an embedded box for wiring equipment. The mounting bracket 30 includes a column body 31 having a substantially U-shaped horizontal cross section that is detachably fitted into a mounting groove 23 provided in the peripheral portion of the case body 21, and a vertically extending tightening screw 32 is rotated on the column body 31. It is held freely. Also, tightening screw 3
A sandwiching piece 33 is screwed onto the 2 so that the sandwiching piece 33 can be moved up and down by rotation of the tightening screw 32. A pull-in notch 31a is formed on the upper side wall of the column 31. When the tightening screw 32 is rotated to move the sandwiching piece 33 upward, the sandwiching piece 33 is finally inserted into the pull-in notch 31a. There is.

Then, the mounting bracket 30 is attached to the case body 21.
When the tightening screw 32 is rotated so as to move the sandwiching piece 33 downward in the state of being fixed to, the sandwiching piece 33 comes out from the drawing-in notch 31a and projects outward in the diametrical direction of the case body 21, The distance from the case body 21 is reduced. Therefore, the clamping piece 32 is inserted into the pull-in notch 31a, the mounting bracket 30 is inserted into the through hole provided in the ceiling plate, and the tightening screw 32 is rotated with the case body 21 abutting on the ceiling surface. Then, when the sandwiching piece 33 is pulled down, the ceiling plate is sandwiched between the case body 21 and the sandwiching piece 33 at the peripheral portion of the through hole, so that the case 20 can be fixed to the ceiling.

On the other hand, when an embedded box such as a switch box for wiring equipment is installed on the ceiling, a box screw inserted into the box hole 24 provided in the peripheral portion of the case body 21 is screwed into the embedded box. If combined, the case 20 can be fixed to the ceiling. By the way, a circular window hole 25 is formed in the vicinity of the center of the portion of the case body 21 surrounded by the surrounding wall 21a. The window body 25 has a hemispherical rotating body 41a and a lens 41b respectively formed in the window hole 25.
A spherical rotating case 41 in which the lens and the lens frame 41c are combined is mounted. The rotating case 41 has a pair of projecting pieces 41d projectingly provided on the lens frame 41c inserted into a pair of groove parts 25a formed on the inner peripheral surface of the window hole 25, and the projecting piece 41d serves as an axis in the groove part 25a. It is possible to rotate and to rotate the protrusion 41d to slide in the groove 25a. Therefore, it is possible to orient the rotating case 41 in a desired direction. The rotating case 41 has a printed circuit board 42 on which the pyroelectric sensor 1 and the brightness sensor 3 are mounted.
Is stored.

The diameter of the rotating case 41 is smaller than the diameter of the window hole 25 and is mounted so as not to drop downward from the case body 21. Further, a pressing plate 44 fixed to the case main body 21 with a pair of fixing screws 43 is arranged on the upper surface side of the rotating case 41, and a support rod biased downward by a spring 45 to the pressing plate 44. 46 elastically contacts the upper surface of the rotating case 41 via the O-ring 47. Therefore,
When the rotating case 41 is pushed and rotated upward, the window 2
The frictional force with the peripheral portion of 5 can be reduced so that the rotating case 41 can be easily rotated. Further, since the O-ring 47 is provided, the frictional force prevents the rotating case 41 from being inadvertently displaced. It

In the case 20, two printed circuit boards 26a, 26b on which other circuit parts except the pyroelectric sensor 1 and the brightness sensor 3 are mounted are housed in a vertically arranged form, and an upper printed circuit board 26a is housed. A terminal portion 27 serving as a quick-connect terminal is mounted on the upper surface of the. That is, the terminal portion 27 accommodates a lock spring 27b formed by bending a band plate having a spring property in a terminal plate 27a having a substantially U-shaped horizontal cross section and connecting an electric wire to the terminal plate 27a.
And the lock spring 27b. Terminal part 2
The electric wire connected to 7 is inserted into the electric wire insertion port 27c formed on the upper wall of the cover 22, and the electric wire connected to the terminal portion 27 is provided so as to abut against each pair of lock springs 27b. By pressing the unlock button 27d, the lock spring 27b is pushed so as to increase the distance between the terminal plate 27a and the lock spring 27b. If the electric wire is pulled out in this state, the electric wire can be easily removed. A tool such as the tip of a flat-blade screwdriver is used to push the unlock button 27d, and the cover 22
The tool may be inserted into the tool insertion port 27e provided on the upper wall of the.

A terminal cover 28 capable of covering the wire insertion port 27c is detachably fitted on the upper surface of the case 20. The terminal cover 28 has engaging legs 28 a protruding downward, and the engaging legs 28 a are provided in the cover 22 to engage holes 2.
The terminal cover 28 is fixed to the case 20 by engaging with 2c. Further, a decorative plate 29 having an opening window 29a at the center is fitted on the lower surface side of the case body 21. The decorative plate 29 is a claw 29b provided on the peripheral portion.
Is fixed to the case body 21 by engaging with the peripheral portion of the case body 21, and the heads of the tightening screw 31 and the box screw are hidden.

(Embodiment 2) In this embodiment, as shown in FIG. 5, in the configuration of Embodiment 1, an external switch SW (see FIG. 6) which is a push button switch for instructing to turn off the light can be connected. A push button input detection unit 19a for detecting the operation of the external switch SW is provided with the connection terminals F ₁₅ and F _16.
And a current limiting circuit 19b. In other words, the push button input detector 19a detects the voltage between the connection terminals F _15, F _16, an external switch SW determines whether the press operation in accordance with the voltage value, the determination result to the microcomputer 2 The connection terminals F ₁₅ , F ₁₆
The current limiting circuit 19b is provided so that the current flowing through the external switch SW does not become excessive. On the other hand, the external switch SW is connected to the connection terminal F in response to the pressing operation.
By switching the Zener diode connected between the _15, F _16, and is configured to vary the voltage between the connection terminals F _15, F _16. As shown in FIG. 7, the connection terminals F ₁₅ and F ₁₆ are mounted on the upper surface side of the upper printed circuit board 26a.

The external switch SW is provided for instructing the microcomputer 2 to perform a forced dimming mode by pressing it. As shown in FIG. 8, when the forced dimming mode is instructed at time t ₅ , the lighting load 5 during the dimming lighting is forcibly turned off. With this function, when it is not necessary to light the lighting load 5 due to a decrease in traffic at night, the lighting load 5 can be forcibly turned off, and as a result, useless power consumption can be suppressed. Further, even when the lighting load 5 is turned off in the forced dimming mode, the pyroelectric sensor 1 detects a person and the time t ₆
If the detection signal is generated at 1, the lighting load 5 is fully turned on, and the notice time T ₁ and the holding time T ₂ are timed. This is convenient because the lighting load 5 can be automatically turned on when a person passes by even after the forced dimming mode is set. When the lighting load 5 is turned on after the shift to the forced dimming mode, the lighting load 5 is turned off after the holding time T ₂ has expired, and not turned on (preliminary dimming is performed). The forced dimming mode is automatically canceled when the ambient brightness reaches the extinction value and the bright period Pb is reached. Therefore, no special operation is required to cancel the forced dimming mode. In the forced dimming mode, the lighting load 5
May not be completely turned off, but the lighting load 5 may be turned on with a light output smaller than that during dimming lighting. Other configurations and operations are similar to those of the first embodiment.

(Third Embodiment) In the second embodiment, the forced dimming mode is selected by the external switch SW, but in the present embodiment, the external switch SW is not used, and a predetermined period is started from the start of the dark period Pd. This is to automatically shift to the forced dimming mode after the effective operation time T ₃ (see FIG. 10) has elapsed. That is, as shown in FIG. 10, at the dark period Pd at time t _0, the microcomputer 2 starts a timed operation effective time T _3, at operation effective in timed in time T ₃ 15% of the light output The dimming lighting is performed, and when the detection signal is generated, the advance notice time T ₁ and the holding time T ₂ are set, and the same operation as in the first embodiment is performed. On the other hand, when the effective operation time T ₃ expires, the lighting load 5 is turned off by switching to the forced dimming mode, or the lighting load 5 is turned on with a light output smaller than that during dimming lighting. Further, as in the second embodiment, if a detection signal is generated in the forced dimming mode, the lighting load 5 is turned on until the holding time expires, and then turned off (or dimmed at a low level).

By this operation, the external switch S
The W operation is no longer necessary and the usability is improved. Especially,
I have to switch to forced dimming mode every night
Convenience in high places. In addition, in the forced dimming mode
The cancellation is the same as in the second embodiment, and the light period Pb is entered.
Will be automatically released when By the way, operation valid time
T₃Is variable by the time setting unit 7 shown in FIG.
The interval setting unit 7 is composed of a variable resistor. This
Sea, effective time T ₃Is adjustable
Operation is effective according to the conditions such as the installation location of the lighting load 5
Time T₃Can be set appropriately. Other configurations and
The operation is similar to that of the second embodiment.

(Embodiment 4) In the present embodiment, the transition to the forced dimming mode is determined by the time. That is, as shown in FIG. 11 proceeds, is provided with a time display unit 8a and the time setting unit 8b, a forced dimming mode at time t ₅ that is set by the time setting unit 8b in the dark period Pd shown in FIG. 12 To do. The time display unit 8a is configured using a liquid crystal display or a light emitting diode display,
The time setting unit 8b is provided with a plurality of switches. When shifting to the forced dimming mode, the lighting load 5 is turned off or dimmed and turned on as in the second embodiment, and if a detection signal is generated during the forced dimming mode, all the lighting loads 5 are turned on until the holding time expires. Let The cancellation of the forced dimming mode is also the same as in the second embodiment, and the forced dimming mode is automatically canceled by shifting to the bright period Pb. With this configuration, it is not necessary to operate the external switch SW, and the usability is improved. In particular, it is convenient in a place where it is necessary to shift to the forced dimming mode every night. Other configurations and operations are similar to those of the second embodiment.

(Embodiment 5) In this embodiment, as shown in FIG. 13, in the structure of Embodiment 1, the brightness sensor 3 is used.
The operation illuminance adjusting unit 4 is omitted, and the illumination load 5 is controlled only according to the presence or absence of a person in the detection area regardless of the ambient brightness. That is, the operation related to the ambient brightness is omitted from the configuration of the first embodiment, and the lighting load 5 is always dimmed and turned on,
When the detection signal is generated, it is turned on for the holding time T ₂ . The light output during dimming lighting is set higher than that in the first embodiment.

This embodiment is used for the purpose of illuminating an exhibit in a museum or an exhibition hall, for example, by turning on dimmed lights when no people are in the vicinity, and turning on all lights when only people are present. is there. In this way, by changing the light amount of the illumination, it is possible to enhance the effect of attracting human eyes. Further, when there is no person, the light output of the illumination load 5 is reduced, so that the power consumption can be suppressed. Other configurations and operations are similar to those of the first embodiment.

(Sixth Embodiment) In this embodiment, the holding time T
A light output during dimming lighting other than ₂ can be set, and FIG. 14 shows an example in which a dimming level setting unit 9 for adjusting the light output during dimming lighting is provided in the first embodiment. Is shown. As the dimming level setting unit 9, one that is switched stepwise by using a changeover switch or one that is continuously adjusted by using a variable resistor is used.

According to this configuration, the light output at the time of dimming lighting can be adjusted according to the rating of the lighting load 5, the installation conditions of the lighting load 5, the surrounding environment, etc., and the convenience is improved. is there. The technical idea of this embodiment can be applied to the configuration of the fifth embodiment. (Embodiment 7) In this embodiment, the light output during the lighting period of the illumination load 5 corresponding to the advance notice time T ₁ in the configuration of Embodiment 1 is changed according to the ambient brightness. That is, the darker the surroundings, the lower the light output when the lighting load 5 is turned on. For example, if the ambient brightness is as shown in FIG.
It is assumed that the detection signal changes as shown in FIG.
5 (b), the light output when the lighting load 5 is lit during the above period is set as shown in FIG. 15 (c).

By such an operation, the difference in brightness before and after detecting a person can be reduced, the eyes can easily adapt to the change in brightness, and the degree of glare is reduced. In addition, the power consumption is reduced as compared with the case where the lighting load 5 is always turned on when the lighting load 5 is turned on. Other configurations and operations are similar to those of the first embodiment.

(Embodiment 8) In this embodiment, as shown in FIGS. 16 and 17, in the configuration of Embodiment 1, a slave unit X is used.
(See FIG. 18) connection terminal F ₁₇ , for connecting
F ₁₈ is provided. This configuration is basically be the same as that provided an external switch SW, and a child unit input detecting unit 19c that detects the operation of the slave unit X by a voltage change between the connection terminals F _17, F _18, connected and a current limiting circuit 19d that current flowing in the slave unit X through terminal F _17, F ₁₈ is limited so as not to excessively.

The child device X comprises a pyroelectric sensor and a person detecting means for generating a detection signal based on the output of the pyroelectric sensor, and is provided with a case having the same structure as the case 20. When the detection signal is generated in the slave X, the Zener diode provided in the slave X is used to connect the connection terminal F ₁₇ ,
The voltage between F ₁₈ is changed, and the slave unit input detection unit 19c that detects this voltage change supplies a detection signal to the microcomputer 2. This detection signal is logically ORed with the detection signal from the heat ray sensor 1 and used for processing in the microcomputer 2. In short, it is equivalent to using pyroelectric sensors in parallel. Like this, child device X
By using, it becomes possible to widen the detection area and to form a complicated detection area by combining the slave units X. Other configurations and operations are similar to those of the first embodiment.

[0046]

According to the invention of claim 1, a heat ray sensor for detecting a heat ray emitted from a human body, and a person for generating a detection signal when detecting the presence of a person in a predetermined detection area based on the output of the heat ray sensor A detection unit, a brightness sensor that detects the brightness of the surroundings, a timer unit that times a predetermined holding time each time a detection signal is generated, and the brightness of the surroundings detected by the brightness sensor is equal to or less than a specified lighting value. When the detection signal is generated during the period from when the lighting value exceeds the specified turn-off value, which is brighter than the lighting value, the lighting load is turned on with a predetermined light output, and when the holding time expires, the light output of the lighting load is generated. It is equipped with lighting control means that reduces the lighting load to the previous state, and turns off the lighting load regardless of the presence or absence of a detection signal during the period from when the ambient brightness exceeds the extinction value to below the lighting value. The means is a period from when the ambient brightness detected by the brightness sensor is equal to or lower than the lighting value to when it is equal to or higher than the extinction value, and excluding the holding time, the lighting load is less than the holding time. The light is dimmed by the output, and during the period from when the ambient brightness is below the lighting value to above the extinction value, it is dimmed even if no person is detected, so it should function as a night light. It is said that it is possible to combine the functions of the main lighting and night lighting with a single lighting load in places where it is desirable to keep the lights on even when there are no people, such as gate lights, stair lights, and corridor lights. There are advantages.

According to a second aspect of the present invention, a heat ray sensor for detecting a heat ray emitted from a human body, and a person detecting means for generating a detection signal when the presence of a person in a predetermined detection area is detected based on the output of the heat ray sensor. A timer means for timing a predetermined holding time each time a detection signal is generated, and lighting the lighting load with a predetermined light output when the detection signal is generated, and generating a detection signal of the light output of the lighting load when the holding time expires. A lighting control means for reducing the state to the previous state is provided, and the lighting control means dims the lighting load with a light output less than the holding time during a period excluding the holding time, and detects the presence of a person. Even when it is not turned on, the lighting load is dimmed and turned on, so you can check what is present in the area illuminated by the lighting load, and the light output of the lighting load increases when people approach it. There is an advantage that it is possible to better visibility Te. Therefore, it can be used in applications such as illuminating the surroundings of an exhibit at a low illumination level in a museum, a museum, or various exhibition halls so that the required illumination level can be obtained when a person approaches. In addition to the effect, it also has the effect of saving power.

As in the third aspect of the invention, the lighting value and the extinguishing value are set to such an extent that the surrounding brightness does not exceed the extinguishing value even if the surrounding brightness becomes the lighting value or less and the lighting load lights up. With this, it is possible to prevent a malfunction due to lighting of the lighting load. According to the invention of claim 4, an external switch capable of instructing the lighting control device so as to reduce the light output of the lighting load during lighting and shifting to the forced dimming mode can be connected. Even when the lights are on, it is possible to turn off the lighting load or turn on the lights with a lower light output by operating an external switch during the night when there is little traffic, and it is possible to suppress unnecessary power consumption. There is an advantage.

According to a fifth aspect of the present invention, the lighting control means is provided with the second timer means for timing the predetermined operation effective time after the ambient brightness detected by the brightness sensor becomes equal to or less than the lighting value. When the operation effective time expires, the light output is shifted to the forced dimming mode, which reduces the light output more than the dimmed lighting state, and it is possible to suppress the unnecessary power consumption as well as the external switch. Since the mode automatically shifts to the dimming mode, there is an advantage that the operation of an external switch becomes unnecessary.

According to a sixth aspect of the present invention, there is provided clock means for measuring a preset switching time, and when the lighting control means comes to the switching time, the light output of the lighting load is further reduced as compared with the dimmed lighting state. As with the external switch, it is possible to suppress unnecessary power consumption in the case of shifting to the forced dimming mode, and since it shifts to the forced dimming mode automatically, there is no need to operate the external switch. There are advantages. In addition, the switching time is not affected by the fluctuation of the sunset time depending on the season, and there is an effect that it can be set to a desired time.

As in the seventh aspect of the invention, in the case where the illumination load is turned off in the forced dimming mode, there is an advantage that power consumption can be suppressed by turning off the illumination load in the forced dimming mode. According to the invention of claim 8, when the detection signal is generated during the period of the forced dimming mode, the lighting load is turned on for a holding time with a light output larger than that before the generation of the detection signal. There is an advantage that the illumination load can be automatically turned on with an appropriate light output when a person is detected even when is turned off or is turned on with a low light output.

According to the ninth aspect of the present invention, the forced dimming mode is canceled when the ambient brightness detected by the brightness sensor is equal to or higher than the turn-off value. The light mode is automatically released, and no special operation is required to release the forced dimming mode, which improves convenience. According to the tenth aspect of the present invention, in the light quantity setting means for setting the light output when the lighting load is dimmed and turned on, the light output during the dimming lighting is set according to the specifications of the lighting load and the installation environment. There is an advantage that can be done.

According to the eleventh aspect of the present invention, when the ambient brightness becomes the lighting value or less and the lighting load starts the dimming lighting, the ambient brightness output by the brightness sensor is brighter by a predetermined value. A device equipped with an extinguishing value setting means for setting a value as an extinguishing value can automatically set the extinguishing value, and can set an optimal extinguishing value according to the specifications of the lighting load and installation conditions. There is an advantage that you can. In other words, depending on the specifications of the lighting load and the installation conditions, it is possible to set a turn-off value that is as close as possible to the lighting value. Even during dimming lighting, turn off the lighting load early at dawn. Therefore, there is an advantage that wasteful power consumption can be suppressed as a result.

According to a twelfth aspect of the present invention, according to the first or second aspect of the invention, at least a heat ray sensor and a person detecting means are provided, and a slave unit for generating a detection signal when the presence of a person is detected can be connected. Since the detection area can be formed by using a plurality of heat ray sensors, there is an advantage that it is possible to set a wide detection area or a detection area having a complicated shape.

[Brief description of drawings]

FIG. 1 shows the first embodiment, (a) is a block diagram,
(B) is an operation explanatory view.

FIG. 2 is an operation explanatory diagram of the above.

FIG. 3 is a diagram showing a usage pattern of the above.

FIG. 4 is an exploded perspective view of the above.

FIG. 5 is a block diagram showing a second embodiment.

FIG. 6 is a diagram showing a usage pattern of the above.

FIG. 7 is an exploded perspective view of the above.

FIG. 8 is an operation explanatory diagram of the above.

FIG. 9 is a block diagram showing a third embodiment.

FIG. 10 is an operation explanatory diagram of the above.

FIG. 11 is a block diagram showing a fourth embodiment.

FIG. 12 is an explanatory diagram of an operation of the above.

FIG. 13 is a block diagram showing a fifth embodiment.

FIG. 14 is a block diagram showing a sixth embodiment.

FIG. 15 is an operation explanatory view showing the seventh embodiment.

FIG. 16 is a block diagram showing an eighth embodiment.

FIG. 17 is an exploded perspective view of the above.

FIG. 18 is a diagram showing a usage pattern of the above.

[Explanation of symbols]

1 Pyroelectric Sensor 2 Microcomputer 3 Brightness Sensor 4 Operating Illuminance Adjuster 5 Lighting Load L ₁ Light-off Value L ₂ Lighting Value Pd Dark Period Pb Bright Period T ₂ Holding Time T ₃ Operation Effective Time X Slave Unit

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mototsugu Kawamata 1048, Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works, Ltd. (56) Reference JP-A-1-189586 (JP, A) JP-A-58-103228 ( JP, A) JP 58-48324 (JP, A) Actual development 62-121839 (JP, U) Actual development 57-192696 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H01H 35/00

Claims (12)

(57) [Claims] 1. A heat ray sensor for detecting a heat ray radiated from a human body, a person detecting means for generating a detection signal when detecting the presence of a person in a predetermined detection area based on the output of the heat ray sensor, and ambient brightness. Brightness sensor for detecting the brightness, timer means for timing a predetermined holding time each time a detection signal is generated, and a lighting value after the ambient brightness detected by the brightness sensor falls below a specified lighting value. When a detection signal is generated during the period until it becomes equal to or more than the bright specified extinction value, the lighting load is turned on with a predetermined light output, and when the holding time expires, the light output of the lighting load is reduced to the state before the detection signal is generated. The lighting control means includes a lighting control means for turning off the lighting load regardless of the presence or absence of a detection signal during a period from when the ambient brightness is equal to or higher than the turn-off value to when it is equal to or lower than the lighting value. During the period from when the ambient brightness detected by the sensor is below the lighting value to when it is above the extinction value and excluding the holding time, the lighting load is dimmed with a light output that is less than the holding time. A hot-wire type automatic switch characterized by: 2. A heat ray sensor for detecting a heat ray radiated from a human body, a person detecting means for generating a detection signal when detecting the presence of a person in a predetermined detection area based on the output of the heat ray sensor, and a detection signal of the detection signal. A timer means for limiting a predetermined holding time for each generation, and lighting the lighting load with a predetermined light output when a detection signal is generated, and reducing the light output of the lighting load to a state before the generation of the detection signal when the holding time expires. And a lighting control means for controlling the lighting control means, wherein the lighting control means causes the lighting load to be dimmed with a light output less than the holding time during a period excluding the holding time. 3. The lighting value and the extinguishing value are set to such an extent that the surrounding brightness does not exceed the extinguishing value even when the lighting load turns on and the surrounding brightness becomes equal to or less than the lighting value. The hot wire type automatic switch according to claim 1. 4. The heat wire according to claim 1, wherein an external switch for instructing the lighting control device to reduce the light output of the lighting load during lighting to shift to the forced dimming mode can be connected. Automatic switch. 5. A second timer means for timing a predetermined operation effective time after the ambient brightness detected by the brightness sensor becomes equal to or less than a lighting value, and the lighting control means is provided when the operation effective time expires. 2. The heat wire type automatic switch according to claim 1, wherein the heat ray automatic switch is shifted to a forced dimming mode in which the light output is further reduced as compared with the dimmed lighting state. 6. A clock means for timing a preset switching time, wherein the lighting control means shifts to a forced dimming mode for further reducing the light output of the lighting load from the dimmed lighting state at the switching time. Claim 1 characterized by the above.
Heat wire type automatic switch described. 7. The hot wire automatic switch according to claim 4, wherein the lighting control means turns off the lighting load in the forced dimming mode. 8. The lighting control means, when the detection signal is generated during the period of the forced dimming mode, lights the lighting load for a holding time with a light output larger than that before the generation of the detection signal. The hot wire type automatic switch according to claim 6. 9. The lighting control means cancels the forced dimming mode when the ambient brightness detected by the brightness sensor is equal to or higher than the extinction value.
Heat wire type automatic switch described. 10. The hot-wire automatic switch according to claim 1, further comprising a light quantity setting means for setting a light output when the lighting load is dimmed and turned on. 11. A value which is brighter by a predetermined value than the ambient brightness output from the brightness sensor when the ambient brightness becomes the lighting value or less and the lighting load starts dimming lighting is set as an extinction value. The heat wire type automatic switch according to claim 1, further comprising a turn-off value setting means. 12. A heat ray automatic system according to claim 1 or 2, wherein at least a heat ray sensor and a person detecting means are provided, and a slave unit which generates a detection signal when detecting the presence of a person is connectable. switch.