JP2000286068A - Heat ray sensing type automatic switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a user-friendly, excellent lighting controller allowing dim ming setting according to operating environment on site. SOLUTION: This heat ray sensing type automatic switch comprises a master device A and a slave device B respectively having heat ray sensors 17, 37 for detecting heat rays, connected to each other through a signal line S. The master device A has a switch element inserted in a power supply line to a lighting load L, and a signal processing part for turning the switch element on and off according to the presence and absence of a human body on the basis of output of the respective heat ray sensors 17, 37. The slave device B has a transmitting/receiving circuit part 31 for transmitting a signal for controlling the lighting load according to the presence and absence of the human body on the basis of the output of its own heat ray sensor 37 to the master device A through the signal line S. The master device A has a slide-type or volume- type knob 19 for setting a prescribed dimming level, while the signal processing part outputs a trigger signal according to the prescribed dimming level set by the slide-type or volume-type knob 19 to the switch element when turning the switch element on and off.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for automatically turning on a load by detecting a heat ray radiated from a human body or the like.
The present invention relates to a heat ray sensing type automatic switch that is turned off.

[0002]

2. Description of the Related Art Conventionally, there has been provided a heat ray sensing type automatic switch which is used for the purpose of detecting the entrance and exit of a person such as an entrance and lighting an illumination load by using a heat ray sensor comprising a pyroelectric element or the like. I have. This type of heat ray sensing type automatic switch includes a heat ray sensor, a switch element that is turned on / off in response to the presence or absence of a human body based on an output of the heat ray sensor, and a signal processing unit that generates a control signal to the switch element. It is common practice to mount a case incorporating the above on a ceiling or the like, and control the turning on and off of the lighting load by inserting a switch element into a power supply path to the lighting load.

In many cases, it is not necessary to turn on the lighting load during daytime when the surroundings are bright. Therefore, an illuminance sensor for detecting ambient illuminance is provided as means for detecting day or night, and a heat ray sensor and an illuminance sensor are provided. In general, the lighting state of the lighting load is controlled by a combination of the outputs described above.

For example, during a daytime when the surroundings are bright, the lighting load is turned off regardless of whether or not a person is detected by the heat ray sensor. Dimming lighting is performed, and when a person is detected by the heat ray sensor, the lighting load is rated (hereinafter referred to as full lighting). Here, during dimming lighting, for example, the light output is set to be about 40% of the full lighting. Such control forms are created for use in gate lights, stairs, corridors, and the like, and by turning on the lighting load with low illuminance even when no person is present,
It can give people a sense of security.

[0005]

However, in the above-described control mode, when the surroundings are dark and no person is detected regardless of the passing frequency of the person, the lighting load is dimmed and lit at a preset level. Therefore, the period during which the lighting load is turned on needlessly is long, and power is wasted. That is, there is a problem that the lighting load is often turned on even in the middle of the night when almost no people pass, so that the dimming setting according to the use environment cannot be easily made on site.

The present invention has been made in view of the above points, and an object of the present invention is to provide an easy-to-use and excellent lighting control device capable of performing on-site dimming setting according to a use environment. It is in.

[0007]

According to a first aspect of the present invention, in order to achieve the above object, a master unit and a slave unit each having a hot wire sensor for detecting a hot wire are connected via a signal line,
The parent device includes a switch element inserted into a power supply path to the lighting load, and a signal processing unit that turns on and off the switch element so as to correspond to the presence or absence of a human body based on the output of each heat ray sensor. A transmission / reception circuit unit for transmitting a signal for controlling a lighting load to the parent device via the signal line based on the output of the heat ray sensor of the child device so as to respond to the presence or absence of a human body. In an automatic switch, the parent device is
A slide-type or volume-type knob for setting a predetermined predetermined dimming level is provided, and the signal processing unit responds to the predetermined dimming level by the slide-type or volume-type knob when turning on / off the switch element. The trigger signal is supplied to the switch element.

[0008]

1 and 2 show an embodiment of a heat ray sensing type automatic switch according to the present invention. As shown in FIG. 1 or FIG. 2, the parent device A and the child device B are connected by a two-wire signal line S, and the heat rays generated from the human body and the like are detected by the heat ray sensors provided in the parent device A and the child device B. By detecting, lighting on / off of the lighting load L is controlled.

Next, the operation of the automatic switch for sensing heat rays will be described with reference to FIGS. In FIG. 3, the commercial power supply AC is rectified and smoothed by the constant voltage circuit 11 and stabilized. The DC power output from the constant voltage circuit 11 is supplied to the signal processing unit 10. The signal processing unit 10 is configured such that the output of the hot-wire sensor circuit 17 including the hot-wire sensor is amplified and input by the amplifier circuit 18 and includes a switch element based on the output of the hot-wire sensor circuit 17. By controlling the load control unit 14, the lighting on / off of the illumination load L is controlled.

The main unit A is provided with a slide type or volume type knob 19 provided therein.
By making this knob 19 variable, the signal processing unit 10
Supplies a trigger signal corresponding to a predetermined dimming level to the dimming circuit 21 to control dimming of the illumination load L. That is, as shown in FIG. 5, the lighting load while no person is detected can be easily changed from a certain set dimming ratio a to a dimming ratio b corresponding to the site.

By the way, the parent device A determines whether or not the hot-wire sensor circuit 37 provided in the child device B has detected a heat ray.
A slave unit signal transmitting / receiving circuit 13 having a function of inputting 0 is provided. The parent device A uses a constant voltage circuit 11 as a power supply and a current limiting circuit 1 to a child device B connected by a signal line S which is an electric wire connected to a terminal (terminal for child device connection: not shown).
2 and the slave unit signal transmission / reception circuit 13,
Is configured to change the line voltage of the signal line S when a heat ray is detected by its own heat ray sensor circuit 37. As a basic configuration of the slave unit B, for example, a pair of terminals to which the signal line S is connected, a bridge rectifier circuit having an AC side terminal connected to both terminals, and a DC side end of the bridge rectifier circuit And a transmission / reception circuit 31 comprising a series circuit of a Zener diode and a switch element connected to the transmission / reception circuit 31. The switch element is turned on / off based on an output of a hot-wire sensor circuit 37 connected to the transmission / reception circuit 31 via an amplification circuit 38. It has become. In short, the line voltage of the signal line S changes in two stages in accordance with the presence or absence of the detection of the hot wire on the slave B, and a binary signal due to this voltage change is transmitted to the master A. Because

On the other hand, the slave unit signal transmitting / receiving circuit 13 of the master unit A detects the line voltage of the signal line S connected to the pair of terminals for connecting the slave unit, compares the detected voltage with the reference voltage, and compares the detected voltage with the reference voltage. The presence or absence of the detection of the heat ray in the slave unit B is determined based on the magnitude relation with the above. This determination result is input to the signal processing unit 10, and the signal processing unit 10 changes the output signal to the load control unit 14 as in the case of the detection by the hot-wire sensor circuit 17 of the parent device A. Therefore, even when a heat ray is detected by the heat ray sensor circuit 37 of the slave B, the lighting load L connected to the master A
Is lit. Thus, the control of the lighting load L as shown in FIG. 4 can be performed.

[0013]

According to the first aspect of the present invention, a master unit and a slave unit each having a heat ray sensor for detecting a heat ray are connected via a signal line, and the master unit has a predetermined light control level. The switch is provided with a slide type or volume type knob, and the signal processing unit supplies a trigger signal corresponding to a predetermined dimming level to the switch element by a slide type or volume type knob when turning on / off the switch element. Therefore, when the load is a lighting load, there is an effect that the dimming control according to the site can be simplified for the lighting load.

[Brief description of the drawings]

FIG. 1 is an external block diagram showing an embodiment of a heat ray sensing type automatic switch according to the present invention.

FIG. 2 is an external block diagram showing another embodiment of the heat ray sensing type automatic switch according to the present invention.

FIG. 3 is a circuit block diagram showing one embodiment of a heat ray sensing type automatic switch according to the present invention.

FIG. 4 is an example of an on-site construction drawing of a heat ray sensing type automatic switch according to the present invention.

FIG. 5 is a view for explaining the operation of the heat ray sensing type automatic switch according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 signal processing unit 11 constant voltage circuit 12 current limiting circuit 13 slave unit signal transmission / reception circuit 14 load control unit 17 hot wire sensor circuit 18 amplifier circuit 19 slide or volume knob 21 dimming circuit 31 transmission / reception circuit 37 hot wire sensor circuit 38 amplification Circuit A Main unit AC commercial power supply B Slave unit L Lighting load S Signal line

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2G065 AA03 AB02 BC03 BC07 BC21 BC31 DA20 3K073 AA75 AA86 BA25 CA01 CA05 CC02 CC12 CG21 CJ01 CJ02 5G055 BB05 5J050 AA35 AA44 BB22 CC07 DD18 FF36

Claims (1)

[Claims] 1. A master unit and a slave unit each having a hot-wire sensor for detecting a hot-wire are connected via a signal line, the master unit is a switch element inserted into a power supply path to a lighting load, and each hot-wire sensor And a signal processing unit for turning on / off the switch element so as to correspond to the presence or absence of the human body based on the output of the slave unit.The slave unit responds to the presence or absence of the human body based on the output of the heat ray sensor of the slave unit. A transmission / reception circuit unit for transmitting a signal for controlling a lighting load to the master unit via the signal line, wherein the master unit is a slide type or volume control for setting a predetermined dimming level. When the switch element is turned on / off, the signal processing section supplies a trigger signal corresponding to a predetermined dimming level to the switch element by the slide type or volume type knob. A heat ray sensing type automatic switch characterized by the following.