JP3826427B2 - Load control device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a load control device that turns a load on and off and holds the load on for a predetermined holding time.
[0002]
[Prior art]
As this type of load control device, there has been conventionally one in which power supply to an illumination load is on / off controlled by a relay. For example, the relay is driven based on the detection output of the heat ray sensor that detects the heat rays emitted from the human body, and the lighting load is turned on and off by turning on and off the contact point inserted between the power source and the lighting load. While controlling, while a predetermined holding time is counted by the timer means, the lighting load is held in a lighting state.
[0003]
[Problems to be solved by the invention]
However, in the above-described conventional configuration, in order to forcibly turn off the illumination load during the counting of the holding time by the timer means, a manual switch that always turns off the illumination load must be operated. Even if a human body is detected, the illumination load cannot be turned on, and there is a problem that it is not easy to use.
[0004]
In addition, in the above conventional configuration, the lighting load is always turned on when a human body is detected by a heat ray sensor regardless of the surrounding brightness. However, when it is installed in a meeting room of an office building, for example, sufficient light is obtained by natural light during the day, although it is not particularly necessary to turn on the lighting load. However, while a person is present in the conference room, the human body is detected by the heat ray sensor and the illumination load is turned on, and there is a problem that wasteful energy is consumed.
[0005]
  BookInventionthe aboveThe purpose is to solve the problem and the lighting load can be forcibly turned off.TheConvenienceIs good andAn object of the present invention is to provide a load control device that can save energy.
[0006]
[Means for Solving the Problems]
  In order to achieve the above object, the invention according to claim 1 is a switch means for turning on / off the power supply from the commercial power source to the lighting load, and a timer means for counting a holding time during which the power supply to the lighting load is held. A control means for switching the switching means and turning on the illumination load until the counting of the holding time by the timer means, a heat ray sensor for detecting the heat rays emitted from the human body, and a detection area based on the detection output of the heat ray sensor A detecting means for generating a detection output when the presence of a person in the vehicle is detected, a brightness sensor for detecting ambient illuminance, and a timer clear switch for clearing the count of the holding time by the timer means, the control means, When the ambient illuminance detected by the brightness sensor is below a predetermined value and a detection output is generated from the discrimination means, switch means is used. As well as on the lighting load with your to turn off the lighting load by controlling the switch means when the count of the hold time is cleared by the timer clear switchA signal output unit that is a load control device and is controlled by the control unit and outputs a signal to the outside when the ambient illuminance detected by the brightness sensor is equal to or less than a predetermined value and a detection output is generated from the determination unit And a signal output brightness sensor on / off switch for turning on / off the control of the signal output means by the control means based on the detected illuminance of the brightness sensor.The illumination load can be forcibly turned off by clearing the count of the holding time with the timer clear switch, and the timer means starts counting from the beginning if a detection output is generated from the determination means next time. Since the illumination load is turned on for a predetermined holding time, usability is improved. In addition, the illumination load can be turned on only when necessary according to the ambient illuminance, and energy saving can be achieved by eliminating unnecessary lighting of the illumination load.Furthermore, if the brightness sensor on / off switch for signal output is turned off, the presence or absence of the human body detected by the heat ray sensor can be monitored externally based on the signal from the signal output means regardless of whether the illumination load is on or off. .
[0008]
  Claim2The invention of claim1In this invention, at least a switch means, a timer means, and a control means are provided, and a brightness sensor is disposed inside the container, so that a space for installing the brightness sensor is unnecessary. It becomes.
  Claim3The invention of claim1In this invention, at least a switch means, a timer means, and a control means are provided, and a sensor connection terminal for connecting a brightness sensor is provided to the container, and the lighting load is turned on. It is possible to install a brightness sensor at a location optimal for determining whether or not the illuminance is present.
[0009]
  Claim4The invention of claim1 or 2 or 3In this invention, a brightness sensor on / off switch for turning on / off switching of the switch means by the control means based on the illuminance detected by the brightness sensor is provided, and the human body is detected by the heat ray sensor regardless of the ambient illuminance. The lighting load can be turned on / off based only on the above, and the inspection work after construction can be easily performed.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail. The present embodiment relates to a load control device with a heat ray sensor formed by connecting a slave unit equipped with a heat ray sensor to a master unit for controlling on / off of an illumination load. It goes without saying that the technical idea of the present invention can be applied to all load control devices that turn on and off and keep the load on while the holding time is counted by the timer means. .
[0012]
FIG. 1 is a block diagram showing this embodiment, and a pair of power supply terminals T to which a commercial power supply AC is connected.₁, T₁And a pair of load terminals T to which the lighting load L is connected₂, T₂And these power terminals T₁, T₁And load terminal T₂, T₂A normally open relay contact (hereinafter referred to as “main contact”) r inserted between the commercial power supply AC and the lighting load L via₀And the main contact r₀A normally open auxiliary relay contact (hereinafter referred to as a “secondary contact”) that is opened and closed in conjunction with₁And the main contact r₀And slave contact r₁Relay driving unit 2 having a latching relay (not shown) for opening and closing (ON / OFF), and a set signal (main contact r) of the latching relay for relay driving unit 2₀To turn on the latching relay) and reset signal (main contact r)₀To drive the latching relay to the direction of turning off the main contact r₀A microcomputer (hereinafter abbreviated as “microcomputer”) 1 which is a control means for performing on / off control of the device and a slave contact r₁And a slave contact state detector 3 for detecting the on / off state of the.
[0013]
A pair of power terminals T₁, T₁In the meantime, a first power supply circuit 4 for generating a 24V DC power source used for a driving power source for a latching relay and a second power source for generating a 5V DC power source used for an operation power source for the microcomputer 1 and the like. The circuit 5 is connected in parallel. A pair of signal output terminals T is provided between the output terminals of the first power supply circuit 4._Three, T_ThreeA relay contact for signal output (hereinafter referred to as “signal contact”) r which is inserted between them and will be described later._sA signal output relay drive unit 6 including a relay for opening and closing the relay is connected in parallel with the relay drive unit 2.
[0014]
Moreover, the subunit | mobile_unit B which comprised the heat ray sensor S which detects the heat ray radiated | emitted from a human body like a pyroelectric element is the main contact r.₀A pair of slave unit connection terminals T of the master unit A having the microcomputer 1 and the like_Four, T_FourConnected to. Furthermore, handset connection terminal T_Four, T_FourIs connected to the microcomputer 1 via the slave unit interface unit 7, and when the presence of a person in the detection area is detected by the heat ray sensor S of the slave unit B, a human body detection signal is sent from the slave unit interface unit 7 to the microcomputer 1. Entered. That is, in this embodiment, the subunit interface unit 7 serves as a determination unit. However, such determination means may be provided on the handset B side. Although only one slave unit B is shown, the slave unit connection terminal T_Four, T_FourA plurality of slave units B can be connected to.
[0015]
In addition, a pair of sensor connection terminals T provided in the parent device A_Five, T_FiveCan be connected to the brightness sensor C. This brightness sensor C converts ambient illuminance into an electrical signal by a photoelectric conversion element such as CdS, for example, and outputs a detection signal from the brightness sensor C to the microcomputer 1 via the sensor interface unit 8. Entered. Further, in the present embodiment, the built-in brightness sensor C ′ built in the parent device A is connected to the sensor connection terminal T._Five, T_FiveAre connected to the sensor interface unit 8 in parallel. Therefore, the microcomputer 1 can know the ambient illuminance based on the detection output of the external brightness sensor C and the built-in brightness sensor C ′.
[0016]
In the master unit A, the manual on switch SW₁, Manual off switch SW₂Automatic switch SW_ThreeAre interface sections 9 respectively.₁~ 9_ThreeIt is connected to the microcomputer 1 via Each switch SW₁~ SW_ThreeThe operation when is operated will be described later. Further, the microcomputer 1 is connected with a variable resistor VR for variably adjusting the timer time of its own timer, and the timer time can be arbitrarily set by the variable resistor VR. Furthermore, the timer clear switch SW for forcibly clearing the count of the holding time by the timer of the microcomputer 1_FourIs a pair of switch connection terminals T₆, T₆This switch connection terminal T₆, T₆Are connected to the microcomputer 1 via the switch interface unit 10. Timer clear switch SW_FourMay be provided in the parent device A.
[0017]
The basic operation of the present embodiment is that when at least one of the ambient illuminances detected by the external brightness sensor C and the built-in brightness sensor C ′ is equal to or less than a threshold value, that is, the parent device A is installed. When at least one of the ambient illuminance of the place where the external brightness sensor C is installed is equal to or lower than a predetermined illuminance, the human body is within the detection area by the slave unit B. When detected, the lighting load L is turned on for a predetermined holding time (timer time) and the signal terminal T_Three, T_ThreeWhen no signal is output more and any of the ambient illuminances is equal to or greater than the threshold value, the illumination load L is not turned on even if the human body is detected by the slave unit B. The threshold value can be switched in two steps (bright and dark) by a threshold value switch SWc connected to the microcomputer 1. The signal terminal T_Three, T_ThreeAs will be described later, the no-voltage signal output from the is supplied to a display such as an external pilot lamp, and the presence or absence of a person in the detection area can be monitored using this display.
[0018]
By the way, in this embodiment, the signal terminal T_Three, T_ThreeThere are two operation modes corresponding to the manner in which the no-voltage signal is output from. In the first mode, the microcomputer 1 uses the signal terminal T based only on the human body detection signal from the child unit B regardless of the ambient illuminance._Three, T_ThreeThe second mode is a mode for outputting a no-voltage signal from the signal terminal T._Three, T_ThreeThis is a mode in which the microcomputer 1 outputs the no-voltage signal based on the human body detection signal only when the output timing of the no-voltage signal from the lamp coincides with the lighting timing of the lighting load L and the ambient illuminance is less than or equal to the threshold value. . These two modes are switched by changing the internal processing of the microcomputer 1 according to the on / off state of the signal output brightness sensor on / off switch SWb connected to the microcomputer 1. It is appropriately selected according to the installation location and the use environment. Note that the timer time (holding time) for turning on the lighting load L can be adjusted by the variable resistor VR connected to the microcomputer 1, and in the present embodiment, the minimum time is about 10 seconds to the maximum about 30 minutes. Can be set to any time in the range.
[0019]
In addition to the first and second modes described above, in this embodiment, the manual on switch SW of the parent device A₁, Manual off switch SW₂Automatic switch SW_ThreeThere are three operation modes (continuous on mode, continuous off mode, and automatic mode) set by operating. That is, in the continuous on mode, the human body detection signal from the slave unit B and the ambient illuminance detected by the brightness sensors C and C ′ are ignored by the microcomputer 1 and the illumination load L is always lit. In the continuous cut mode, the human body detection by the handset B is ignored by the microcomputer 1 and the illumination load L is always turned off. Further, in the automatic mode, the illumination load L is turned on / off according to the ambient illuminance detected by the brightness sensors C and C ′ and the presence / absence of human body detection by the slave unit B. In the present embodiment, the brightness sensor C ′ is built in the parent device A, so that the installation space for the brightness sensor C ′ is not required, and the sensor connection terminal T to which the external brightness sensor C is connected._Five, T_FiveIs provided in the parent device A, the brightness sensor C can be installed in a place optimal for illuminance determination as to whether or not the illumination load L is turned on, and usability can be improved.
[0020]
Next, the operation of this embodiment will be described with reference to FIGS.
First, the operation in the first mode will be described with reference to the flowcharts of FIGS. 2 and 3, the time charts of FIGS. 4 and 5, and the state transition diagrams of the microcomputer 1 of FIGS. As shown in FIGS. 4 and 5, immediately after the power is turned on, the microcomputer 1 is in a standby state until the initialization of the microcomputer 1 is completed and the operation is stabilized, and the automatic mode is automatically set. After stabilization, the microcomputer 1 takes in the detection signals from the external brightness sensor C and the built-in brightness sensor C ′ via the sensor interface unit 8, and the ambient illuminance of both exceeds the preset threshold value. Judge whether or not. FIG. 4 is a time chart showing the operation when the ambient illuminance detected by at least one of the brightness sensors C and C ′ is less than or equal to the threshold value, and FIG. 6 is a state transition diagram of the microcomputer 1 at that time. Note that the symbols {circle around (1)} to {circle around (9)} shown in the lower part of FIG. 4 correspond to the respective states marked with the symbols {circle around (1)} to {circle around (9)} in FIG. Is the same. In this state, the child unit B detects a human body in the detection area, and if a human body detection signal is input from the child unit interface unit 7 to the microcomputer 1 (in FIG. 6 and FIG. 7, “child unit input is ON”). The microcomputer 1 outputs a set signal to the relay drive unit 2 to drive the latching relay on, thereby the main contact r₀Is turned on and the illumination load L is lit ((1) → (2)). At the same time as the set signal, the microcomputer 1 outputs an ON signal to the signal output relay drive unit 6 to drive the relay, and during output of the ON signal, the signal contact r_sIs turned on.
[0021]
Here, the microcomputer 1 starts a timer operation by its own timer from the input time of the human body detection signal, and continues to output the ON signal until the count of the holding time T set by the variable resistor VR is completed (▲ 2 ▼). However, if the human body detection signal is input again by the end of the counting of the holding time T, the microcomputer 1 retriggers the timer at that time to clear the count value, and causes the timer to perform the timer operation from the beginning. (See FIG. 4). When the count of the holding time T by the timer is finished, the microcomputer 1 connects the main contact r to the relay drive unit 2.₀Is output, and the output of the ON signal to the signal output relay drive unit 6 is stopped. Then, a slave contact point r is detected by the slave contact state detection unit 3.₁Is detected, the microcomputer 1 detects that the main contact r is off.₀Is also determined to have been normally turned off, and returns to the state of waiting for the input of the human body detection signal from the slave unit B ((2) → (1)).
[0022]
On the other hand, the slave contact state detector 3 detects the slave contact r despite the reset signal being output.₁If it is not detected that is turned off, the main contact r₀In such a case, the microcomputer 1 starts from the main routine of FIG.₀The process branches to a subroutine (see FIG. 3) for releasing the welding. In this subroutine, the microcomputer 1 outputs a set signal to the relay drive unit 2 after setting the counter to an initial value (= 1), and then outputs a reset signal. In this way, by continuously outputting the set signal and the reset signal within a relatively short time, mechanical vibration such as chattering occurs in the latching relay of the relay drive unit 2. Therefore, the main contact r₀If the welding is relatively light, the portion welded by the vibration can be cut off. And the main contact r₀If is turned off, the microcomputer 1 returns to the main routine. The main contact r₀Is not turned off, the above operation is repeated n times set in advance in the program, and the main contact r is still₀Can no longer be turned off, it is no longer the main contact r₀Is considered to be severely welded, the microcomputer 1 ends the subroutine, for example, the main contact r₀Executes processing to notify the welding (such as the warning lamp lighting display). The number of repetitions can be set arbitrarily, but it is desirable to set it to about 6 for practical use.
[0023]
By the way, the manual off switch SW in the automatic mode.₂When is operated, the microcomputer 1 shifts to the continuous cut mode (1 → 4), and the microcomputer 1 immediately outputs a reset signal to turn off the lighting load L if the lighting load L is on. However, the manual off switch SW is turned on while the lighting load L is lit in the automatic mode.₂Is operated, only the no-voltage signal output is continuously output until the holding time T elapses ((2) → (3) → (4)). In the automatic mode, the manual on switch SW₁Is operated (1 →→ 6), the microcomputer 1 always turns on the illumination load L and the signal terminal T._Three, T_ThreeSignal contact r connected between_sContinue to output a no-voltage signal while keeping ON. Further, in the continuous cut mode or the continuous on mode, the manual on switch SW is used.₁And manual off switch SW₂When is operated, the mode shifts to the continuous on mode and the continuous off mode ((6) → (8) → (1), (4) → (1)), respectively.
[0024]
Here, the timer clear switch SW is turned on while the lighting load L is lit in the automatic mode._FourWhen is turned on, the microcomputer 1 clears the count value of its own timer, outputs a reset signal to the relay drive unit 2 to turn off the illumination load L, and simultaneously outputs the signal output relay drive unit 6. On the other hand, the output of the ON signal is stopped ((6) → (8) → (1)). That is, according to the present embodiment, the timer clear switch SW_FourThe illumination load L can be turned off in the automatic mode with the manual off switch SW.₂Compared with the case where the lighting load L is turned off, the lighting load L is not turned on even if the human body detection signal is input next, and there is an advantage that the usability can be improved. .
[0025]
When the ambient illuminance is greater than or equal to the threshold value, as shown in FIGS. 2, 5, and 7, the manual on switch SW₁The lighting load L remains in an extinguished state unless the operation is performed and the automatic detection mode, the continuous on mode, or the continuous off mode is selected. Is input to the signal terminal r for the holding time T._sTurns on and outputs a no-voltage signal.
[0026]
Next, the operation in the second mode will be described with reference to the flowchart of FIG. 8 and the time charts of FIGS. As in the first mode, after the respective parts are stabilized after the power is turned on, the microcomputer 1 takes in the detection signals from the external brightness sensor C and the built-in brightness sensor C ′ via the sensor interface unit 8. , It is determined whether or not both ambient illuminances exceed a preset threshold value. FIG. 9 is a time chart showing an operation when at least one of the ambient illuminances is equal to or less than a threshold value. In this state, the handset B detects the human body, and if the handset detection signal is input to the microcomputer 1 from the handset interface section 7, the microcomputer 1 outputs a set signal to the relay drive section 2 to turn on the latching relay. Drive. As a result, the main contact r₀Is turned on and the illumination load L is lit. At the same time as the set signal, the microcomputer 1 outputs an ON signal to the signal output relay drive unit 6 to drive the relay, and during output of the ON signal, the signal contact r_sIs turned on and a no-voltage signal is output. When the timer of the microcomputer 1 finishes counting the holding time T, a reset signal is output to the relay drive unit 2 to turn off the illumination load L, and an ON signal is output to the signal output relay drive unit 6. Stop the output of. Then, a slave contact point r is detected by the slave contact state detection unit 3.₁Is detected, the microcomputer 1 detects that the main contact r is off.₀Is determined to have been normally turned off, and the process returns to the state of waiting for the input of the human body detection signal from the handset B. The slave contact state detector 3 detects the slave contact r.₁Is not detected, the main contact r₀If the microcomputer 1 is determined to be welded, the microcomputer 1 branches to the subroutine of FIG. 3 and executes the operation described above.
[0027]
In the automatic mode, the manual off switch SW₂Is operated, the microcomputer 1 shifts to the continuous cut mode, and if the lighting load L is on, the microcomputer 1 immediately outputs a reset signal to turn it off, and also stops the no-voltage signal output. On the other hand, in the automatic mode, the manual on switch SW₁Is operated, the microcomputer 1 switches on the lighting load L at all times, and if the slave unit B detects a human body, the signal terminal T_Three, T_ThreeIn the meantime, a no-voltage signal is output for the holding time T. Further, in the continuous cut mode or the continuous on mode, the manual on switch SW is used.₁And manual off switch SW₂When is operated, the mode shifts to the continuous on mode and the continuous off mode, respectively. Note that the timer clear switch SW is turned on when the illumination load L is on in the automatic mode or the continuous on mode._FourIs turned on, the count value of the timer of the microcomputer 1 is cleared and the illumination load L is turned off.
[0028]
On the other hand, when the ambient illuminance is greater than or equal to the threshold value, the manual on switch SW is used as shown in FIG.₁As long as the lighting load L is not operated to shift to the continuous on mode, the lighting load L remains in the off state, and the signal terminal T is detected even if the handset B detects the human body._Three, T_ThreeNo voltage signal is output. In the present embodiment, the brightness sensor C in the microcomputer 1 is turned on by turning on the brightness sensor ON / OFF switch SWa connected to the microcomputer 1 in both the first mode and the second mode. , C ′ can be ignored, and the illumination load L can be controlled to be turned on / off only by human body detection by the slave unit B. That is, by turning off the functions of the brightness sensors C and C ′ as described above with the brightness sensor ON / OFF switch SWa, the inspection work after the construction of the parent device A and the child device B can be easily performed. There is an advantage.
[0029]
Next, the structure of the parent device A of this embodiment will be described with reference to FIGS.
The circuit of the parent device A described above includes two printed circuit boards 21 as shown in FIG.₁, 21₂Mounted on each printed circuit board 21₁, 21₂Are connected by a connection cable 22 such as a flat cable. These printed circuit boards 21₁, 21₂Is housed in a container 20 composed of a synthetic resin body 20a and a cover 20b. The container body 20 is formed in a dimension that can be attached to a so-called double attachment frame 40 for a wiring device that is standardized in JIS (Japanese Industrial Standard) or the like. As shown in FIG. 11, the two mounting frames 40 are formed by arranging normal standardized mounting frames on the left and right sides and integrally mounting window portions.
[0030]
Manual on switch SW is on the front of cover 20b₁, Manual off switch SW₂Automatic switch SW_Three, Brightness sensor on / off switch SWa, signal output brightness sensor on / off switch SWb, and threshold value selector switch SWc.₁~ 23₆A sliding operation knob 24 of the variable resistor VR for adjusting the holding time T of the timer, and the printed circuit board 21.₂A light receiving window 25 that faces the light receiving surface of a built-in brightness sensor C ′ made of CdS or the like mounted on the outside and an operation display unit 26 that displays the lighting state of the illumination load L are disposed. . As shown in FIG. 15, slide type switches are used for the brightness sensor on / off switch SWa, the signal output brightness sensor on / off switch SWb, and the threshold value switch SWc. Further, the operation units 23 of the brightness sensor on / off switch SWa, the signal output brightness sensor on / off switch SWb, and the threshold value switch SWc._Four~ 23₆In addition, the operation knob 24 of the variable resistor VR is hidden by a door 27 that is openably and closably attached to the front surface of the cover 20b so as not to be inadvertently operated. The door 27 is pivotably locked at one end to a groove 20c provided on the front surface of the cover 20b. The door 27 is opened from the groove 20c with the door 27 opened at a substantially right angle to the front surface of the cover 20b. It can be pushed inside 20b. Therefore, the door 27 can be fixed when the holding time T is adjusted.
[0031]
Further, a power terminal T is provided inside one side of the body 20a formed in a substantially box shape.₁, T₂And load terminal T₂, T₂The quick connection terminal 28 is mounted, and a wire insertion hole 29 for inserting an electric wire connected to the quick connection terminal 28 is provided on the bottom surface of the body 20a. Further, a signal terminal T is provided on the bottom surface of the body 20a._Three, T_Three, Handset connection terminal T_Four, T_Four, Sensor connection terminal T_Five, T_Five, Switch connection terminal T₆, T₆The screw type terminal 30 which comprises is provided.
[0032]
The main body 20 of the parent device A configured as described above has a plurality of pairs of engaging claws 35 projecting from the side surface of the cover 20b in a state of being inserted into the window portion of the mounting frame 40. It is fixed to the mounting frame 40 by engaging with engagement holes 41 formed in the side piece. Therefore, the embedded wiring device using the mounting frame 40 and the mounting frame 40 can be shared, and it is not necessary to newly manufacture a mounting member, leading to a reduction in manufacturing cost, and also during construction. Since construction techniques similar to those for wiring equipment can be applied, it is not necessary to learn new techniques.
[0033]
In this embodiment, the latching relay is exemplified as the switch means for turning on / off the lighting load L. However, the switch means is not limited to this, and a so-called single steep relay (monostable relay), a semiconductor switch, or the like is used. It is also possible to use.
FIG. 16 shows a load control device according to the present embodiment arranged in a meeting room of an office building, and a single parent device A includes a plurality of child devices B... And a plurality of lighting loads L. It is a schematic block diagram at the time of connecting. The master unit A is disposed on the wall using the mounting frame 40, and is connected to the AC power source AC and the plurality of illumination loads L through a power supply line Lp, and the plurality of slave units B through two signal lines. Terminal unit connection terminal T by Ls_Four, T_FourIt is connected to the. In addition, the signal terminal T of the parent device A_Three, T_ThreeIs connected to a display lamp La installed outside the door D of the conference room, and is connected to a display transformer Tr for supplying power from the AC power supply AC. Although not shown, the sensor connection terminal T of the parent device A_Five, T_FiveIs connected to an external brightness sensor C disposed at a predetermined location in the conference room via a signal line. On the other hand, the subunits B are arranged on the ceiling A and detect the presence / absence of a person in the detection area X expanding downward. When the ambient illuminance is below the threshold value and the human body is detected by the slave unit B ..., the master unit A turns on the plurality of illumination loads L ... and outputs a signal to the display transformer Tr. The display lamp La is turned on by supplying power to the display lamp La. That is, the presence / absence of a person in the conference room can be monitored from the outside by turning on / off the display lamp La.
[0034]
As described above, according to this embodiment, human body detection by a plurality of slave units B is managed by a single master unit A even in a place such as the conference room where the range of lighting control is wider than that in a general home. Thus, on / off control of the plurality of lighting loads L can be performed.
[0035]
【The invention's effect】
  According to the first aspect of the present invention, there is provided a switch means for turning on / off the power supply from the commercial power source to the lighting load, a timer means for counting a holding time during which the power supply to the lighting load is held, and a timer for controlling the switching of the switch means. The control means for turning on the illumination load until the counting of the holding time by the means, the heat ray sensor for detecting the heat rays emitted from the human body, and the presence of a person in the detection area are detected based on the detection output of the heat ray sensor. A detection means for generating a detection output, a brightness sensor for detecting the ambient temperature, and a timer clear switch for clearing the count of the holding time by the timer means, and the control means includes the ambient temperature detected by the brightness sensor. When the illuminance is below a predetermined value and the detection output is generated from the discrimination means, the switch means is controlled to turn on the illumination load. Both turns off the lighting load by controlling the switch means when the count of the hold time is cleared by the timer clear switchA load control device, a signal output means for outputting a signal externally controlled by the control means when the ambient temperature detected by the brightness sensor is below a predetermined value and a detection output is generated from the discrimination means And a signal output brightness sensor on / off switch for turning on / off the control of the signal output means by the control means based on the detected illuminance of the brightness sensor.Therefore, the load can be forcibly turned off by clearing the holding time count with the timer clear switch, and if the detection output is next generated from the discriminating means, the timer means starts counting from the beginning, and Since the illumination load is turned on only for the holding time, there is an effect that usability is improved.AlsoThe illumination load can be turned on only when necessary according to the ambient illuminance, and there is an effect that energy saving can be achieved by eliminating unnecessary lighting of the illumination load.Furthermore, if the brightness sensor on / off switch for signal output is turned off, the presence or absence of the human body detected by the heat ray sensor can be monitored externally based on the signal from the signal output means regardless of whether the illumination load is on or off.There is an effect.
[0037]
  Claim2The invention of the present invention is provided with a container in which at least switch means, timer means and control means are mounted, and a brightness sensor is disposed in the interior of the container, so that the installation space for the brightness sensor becomes unnecessary, There is an effect that the construction can be saved.
  Claim3According to the present invention, at least the switch means, the timer means, and the control means are provided, and the sensor connection terminal for connecting the brightness sensor is provided to the container. It is possible to install a brightness sensor at an optimal place for determining the illuminance, and there is an effect that the usability can be improved.
[0038]
  Claim4Since the invention includes a brightness sensor on / off switch for turning on / off the switching means of the switch means by the control means based on the illuminance detected by the brightness sensor, only the human body detection by the heat ray sensor is possible regardless of the ambient illuminance. Based on this, the lighting load can be turned on / off, and the inspection work after the construction can be easily performed.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating an embodiment.
FIG. 2 is a flowchart for explaining the operation of the above.
FIG. 3 is a flowchart for explaining the operation of the above.
FIG. 4 is a time chart for explaining the operation described above.
FIG. 5 is a time chart for explaining the operation described above.
FIG. 6 is a state transition diagram of the microcomputer for explaining the operation described above.
FIG. 7 is a state transition diagram of the microcomputer for explaining the operation described above.
FIG. 8 is a flowchart for explaining the operation of the above.
FIG. 9 is a time chart for explaining the operation described above.
FIG. 10 is a time chart for explaining the operation described above.
FIG. 11 is a front plan view showing the master unit of the above.
FIG. 12 is a rear view showing the master unit of the above.
13 is a cross-sectional view taken along line XX of FIG.
FIG. 14 is a plan view showing a state in which the body and cover of the parent device are opened.
FIGS. 15A and 15B show a main part of the main unit of the above, wherein FIG. 15A is a plan view and FIG.
FIG. 16 is a schematic configuration diagram showing an example of a usage state of the above.
[Explanation of symbols]
A parent device
B child unit
C, C 'brightness sensor
AC commercial power
L Lighting load
1 Microcomputer
2 Relay drive unit
r₁  Main contact
VR variable resistor
SW_Four  Timer clear switch

Claims (4)

Switch means for turning on / off the power supply from the commercial power source to the lighting load, timer means for counting the holding time during which the power supply to the lighting load is held, and switching time of the switch means to count the holding time by the timer means Control means for turning on the illumination load until the end, a heat ray sensor for detecting heat rays emitted from the human body, and a detection output is generated when the presence of a person in the detection area is detected based on the detection output of the heat ray sensor A determining means, a brightness sensor for detecting the ambient illuminance, and a timer clear switch for clearing the count of the holding time by the timer means, and the control means has the ambient illuminance detected by the brightness sensor being a predetermined value or less. And when the detection output is generated from the discrimination means, the switch means is controlled to turn on the illumination load, and the timer A load controller to turn off the lighting load by controlling the switch means when the count of the hold time is cleared by the rear switch, ambient illuminance detected by the brightness sensor is equal to or less than a predetermined value and the determination means Signal output means for outputting a signal to the outside controlled by the control means when detection output is generated, and signal output for turning on / off the control of the signal output means by the control means based on the illuminance detected by the brightness sensor A load control device comprising a brightness sensor on / off switch for use . 2. The load control device according to claim 1, further comprising a housing in which at least a switch means, a timer means and a control means are mounted, and a brightness sensor is disposed inside the housing. 2. A load control apparatus according to claim 1, further comprising a housing in which at least the switch means, the timer means and the control means are mounted, and provided with a sensor connection terminal for connecting a brightness sensor to the body. . 4. The load control device according to claim 1, further comprising a brightness sensor on / off switch for turning on / off the switching control of the switch means by the control means based on the illuminance detected by the brightness sensor .

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