JPH0837091A - Heat ray detection type illumination load control system - Google Patents

Abstract

PURPOSE:To extend the life of an illumination load by reducing the repetition frequency in a unit time for turning the illumination load on or off when the illumination load is turned on or off in response to the presence of a person. CONSTITUTION:When a heat ray sensor 1 detects the heat rays from a human body in a detection region, a switch element 3 inserted between a commercial power source AC and an illumination load L is turned on. A timer 4 turns the switch element 3 off after the on-state of the switch element 3 is maintained for a prescribed delay time. The timer 4 is provided with a variable-time section 11, and the variable-time section 11 extends the delay time as the number of times that a person is detected by the heat ray sensor 1 is increased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat ray detecting type illumination load control system for automatically turning on / off a lighting load by detecting a heat ray from a human body.

[0002]

2. Description of the Related Art Generally, this kind of heat ray detection type illumination load control system detects a heat ray from a human body by a heat ray sensor composed of a pyroelectric infrared sensor, and a relay or a semiconductor inserted between a power source and an illumination load. It is configured to turn off the switch element when a certain delay time set by the timer elapses after turning on the switch element including the switching element. In this way, the lighting load can be automatically turned on and off depending on the presence or absence of a person within the detection area of the heat ray sensor, so that it is relatively rarely used by people such as toilets, corridors, and stairs. By adopting the lighting for the place, it is possible to suppress unnecessary power consumption due to unnecessary lighting of the lighting load, and prevent forgetting to turn off the lighting load.

[0003]

By the way, the frequency with which a person uses the above-mentioned place is not constant but varies depending on the date and time. However, in the above configuration, since the delay time is fixedly set to a fixed value, it is not possible to cope with changes in the frequency of use by people. In other words, when the time from when a user is detected by the heat ray sensor until when the next user is detected is slightly longer than the delay time, the lighting load turns on immediately after turning off. The lighting load is frequently turned on and off. In general, the lighting load is heavily stressed when it is turned on. Therefore, if the lighting load is frequently turned on and off in a short time, the life of the lighting load is shortened.

An object of the present invention is to solve the above-mentioned problems, and by adjusting the delay time in accordance with the frequency of use (detection frequency) by humans, the repetition frequency of turning on / off the lighting load per unit time. It is intended to provide a heat ray detection type lighting load control system which reduces the heat dissipation and extends the life of the lighting load.

[0005]

According to a first aspect of the present invention, there is provided a heat ray sensor for detecting a heat ray from a human body within a detection area, and the heat ray sensor is turned on when the human body is detected and turned off after a predetermined delay time. Switch element, a timer that defines the delay time, and a lighting load that is connected to a power source via the switch element.The timer extends the delay time as the number of times of human detection per unit time increases. It is characterized by including a time varying unit for performing.

According to the second aspect of the present invention, the timer includes a clock section for measuring the day of the week and the time, an input section for inputting the delay time in association with the day of the week and the time, and a day of the week input from the input section. And a memory that stores the time and the delay time in association with each other, and a delay control unit that employs the delay time stored in the memory when the current time measured by the clock unit matches the day of the week and the time stored in the memory. It is characterized by including.

According to the third aspect of the present invention, the timer includes a clock section for clocking a day of the week and a time, and a time varying section for a day of the week and a time at which the number of detections of a person per unit time exceeds a prescribed threshold value. A memory that stores the delay time in association with the required delay time; and a delay control unit that adopts the delay time stored in the memory when the current time measured by the clock unit matches the day of the week and the time stored in the memory. It is characterized by including.

According to a fourth aspect of the present invention, there is provided a heat ray sensor for detecting a heat ray from a human body in the detection area, and a switch element which is turned on when the human body is detected by the heat ray sensor and is turned off after a predetermined delay time. A timer for defining the delay time and a lighting load connected to a power source through a switch element are provided, and the lighting load is characterized in that all lighting is performed when the switching element is on and dimming lighting is performed when the switching element is off.

According to a fifth aspect of the present invention, a heat ray sensor for detecting heat rays from a human body in a detection area, a lighting load, and when the human body is detected by the heat ray sensor, the lighting load is fully lit for a predetermined delay time, etc. In the period (1), a dimming circuit for dimming and lighting, and a timer for defining the delay time are provided.

[0010]

According to the structure of the invention of claim 1, since the timer is provided with the time varying unit for extending the delay time as the number of times of detecting a person per unit time increases, when the frequency of detecting a person is relatively high. By extending the delay time, the next person can be detected by the heat ray sensor while the lighting load is not extinguished, so the frequency of lighting and extinguishing the lighting load is relatively low, resulting in stress to the lighting load. The life of the lighting load can be reduced and the life of the lighting load can be extended.

According to the second aspect of the present invention, a memory for storing the day of the week and the time input from the input unit and the delay time in association with each other is provided, and the present time stored in the clock unit is stored in the memory. The corresponding delay time stored in the memory is used when the specified day of the week and time match, so the day of the week and the time known to be frequently used can be controlled by the delay time stored in the memory. , The frequency of turning on and off the lighting load is claimed.
It can be further reduced compared to the configuration of.

According to the third aspect of the present invention, the day of the week and the time at which the number of times of detection of a person per unit time exceeds the specified threshold value are associated with the delay time obtained by the time variable unit at that time. Since the delay time stored in the memory is used when the current time stored in the memory and clocked by the clock matches the day and time stored in the memory, it depends on the frequency of human detection at each time on each day. Since the delay time is automatically registered in the memory, the delay time is learned for the days and times when the frequency of human detection exceeds the threshold. In short, an appropriate delay time is set without the need to manually input the delay time.

According to the structure of the invention of claim 4, when the switch element is turned on, the lighting load is fully turned on, and when the switch element is turned off, the lighting load is dimmed and turned on. Since there is no stress caused by shifting to, the stress on the lighting load is relatively small and the life of the lighting load is long even when the frequency of human detection is relatively high. Moreover, when the lighting load is used for street lights, it dims the light when people are not passing through to reduce power consumption, but gives a sense of anxiety to passersby when it is completely turned off and dark. And if you use it for lighting stairs or corridors,
Even from the time when a person is detected until the lighting load is fully lit, you can see your feet, which increases safety.

According to the configuration of the invention of claim 5, the lighting load is fully turned on only within a delay time after a person is detected, and the dimming lighting is performed during other periods. There is no stress due to repeated turning on and off of the load, the life of the lighting load is long, it is energy saving when used for street lights and does not cause people anxiety, and it is safe when used for lighting stairs and corridors Can be secured. In addition, a dimming circuit is provided that turns on the lighting load for a specified delay time when the human body is detected by the heat ray sensor, and dims the lighting during other periods, so dimming can be performed by external control. It is applicable even when a lighting load that does not exist is used.

[0015]

【Example】

(Embodiment 1) In this embodiment, as shown in FIG. 1, a heat ray sensor 1 including a pyroelectric infrared sensor is provided.
When a heat ray from a human body existing in the detection area of 1 is detected, the switch element 3 formed of a relay or a semiconductor switching element is turned on through the controller 2. The switch element 3 is inserted between the commercial power supply AC and the lighting load L, and the lighting load L is turned on / off according to the on / off of the switch element 3. The control unit 2 turns off the switch element 3 and turns off the lighting load L after a delay time set by the timer 4 has elapsed since the person was detected by the heat ray sensor 1.

The timer 4 is provided with a time varying unit 11 that changes the delay time according to the frequency of human detection by the heat ray sensor 1. The time varying unit 11 constantly obtains the number of times a person is detected per unit time, and increases the delay time as the number of times increases. Here, if the delay time is extended and exceeds the predetermined time, the extension time becomes infinite. That is, the lighting load L is always on. In this way, when the frequency of human detection increases, the time until the lighting load L is turned off is extended to reduce the frequency of turning off the lighting load L.
By lighting the lighting load L almost continuously, it is possible to reduce the stress on the lighting load L caused by repeating lighting and extinguishing.

Further, the timer 4 is an input unit 1 for inputting a desired delay time at a desired day of the week and time (time zone).
2 and a memory 13 that stores the day of the week and the time input from the input unit 12 in association with the delay time, so that the delay time at a specific day of the week and time can be stored in the memory 13 in advance. Further, the timer 4 includes a clock unit 14 that measures the current time by day and time.
And the current time measured by the clock unit 14 is stored in the memory 13
When the day of the week and the time stored in
3 and a delay control unit 15 that employs the delay time stored in FIG. That is, when the day of the week and the time of day when a person is frequently detected are known in advance, the day of the week and the time of day are stored in the memory 13 together with the desired delay time.
And the delay time stored in the memory 13 is stored in the control unit 2
To be used in. In this case, the delay time stored in the memory 13 is used in preference to the delay time calculated by the time varying unit 11. Alternatively, the longer one of the delay times may be adopted. put it here,
The configuration of the timer 4 excluding the control unit 2 and the input unit 12 is realized by a microcomputer. Further, when the time zone in which the frequency of human detection is high is stored in the memory 13, the start time and the end time of the time zone are stored.

As described above, the delay time is varied according to the frequency with which a person is detected by the heat ray sensor 1, and a time schedule is set for the days and times when the frequency with which a person is detected is known in advance. Since the delay time is defined by this, it is possible to reduce the number of times the lighting load L repeats turning on and off, and as a result, the stress of the lighting load L is reduced and the life of the lighting load L is extended. is there.

At the time of actual construction, as shown in FIG. 2, the circuit portion excluding the heat ray sensor 1 and the lighting load L is provided in one body 5, and the body 5 is attached to a wall or the like. The commercial power supply AC is connected to the body 5, and the heat ray sensor 1
The lighting load L and the body 5 are connected via the connection line 6. A switch group SW as the input unit 12 is provided on the front surface of the body 5. The switch group SW includes a switch for selecting an operation mode for performing the above operation and a setting mode for setting data to be stored in the memory 13, a day of the week selection switch, a switch for selecting start time and end time, and a time selection. , A switch for selecting the delay time, and the like are provided. Further, a display portion DP for displaying the selected day of the week, time and delay time is provided. The ON / OFF of the switch element 3 is displayed by an operation indicator lamp LD including a light emitting diode, and an automatic mode in which the lighting load L is turned on / off depending on the presence or absence of a person, and the lighting load L is turned on regardless of the presence or absence of a person. A mode selection switch MS is provided that selects a manual lighting mode and a manual lighting mode in which the lighting load L is turned off regardless of the presence or absence of a person.

(Embodiment 2) This embodiment is basically the same as the first embodiment, but as shown in FIG. 3, the data to be stored in the memory 13 is not input from the input unit 12 but is automatically input. It is designed to be registered. That is,
The difference from the first embodiment lies in the timer 4 and the time variable unit 1
In No. 1, when the detection frequency of a person exceeds the specified threshold value, the obtained delay time is stored in the memory 13 in association with the current day of the week and time counted by the clock unit 14. As the time, the time at which the detection frequency exceeds the threshold and the time at which the detection frequency becomes equal to or less than the threshold are stored as the start time and the end time, respectively.

With the above configuration, the delay time corresponding to the day of the week and the time can be automatically registered in the memory 13, and there is an advantage that no trouble is involved in the registration. In addition, since the day of the week and the time having a high detection frequency are automatically selected and the delay time is set, the delay time is not unnecessarily extended and wasteful power consumption can be suppressed. That is, in the configuration of this embodiment, the delay time is learned. Here, since it is possible that the frequency of human detection may increase sporadically for one week only for a specific day and time, when the delay time read from the memory 13 is adopted, the delay time read from the memory 13 is used. If the delay time is shorter than the delay time calculated by the time variable unit 11 at that time, the registered contents of the memory 13 may be deleted.

The operation of this embodiment is summarized in FIG. That is, when the power is turned on, it is determined whether or not a person is detected by the heat ray sensor 1 (S1), and when a person is detected, it is determined whether or not it is within a certain time since the person was previously detected (S2). ). In this way, when the number of times a person is detected within a fixed time from the previous detection exceeds the specified number of times (S3), the delay time required by the time varying unit 11 and the clock unit 14 are clocked at that time. The day of the week and the time (time zone) are stored in the memory 13 (S4). In short, when the human detection frequency exceeds the threshold value, it is registered in the memory 13. If the time interval for detecting a person exceeds a certain time, the number of times of detecting the person is reset to 0 (S5). During the period when the number of inputs is within the specified number (including 0), the value specified as the reference value of the delay time is set to the day of the week and the time (time zone).
It is also stored in the memory 13 (S6). Next, the delay time stored in the memory 13 is read out, the time measurement of the delay time is started (S7), and the time measurement until the next detection is started (S8). After that, when the measurement of the delay time has expired (S9), the switch element 3 is controlled to be turned off so that the lighting load L is turned off (S10). If the delay time has not expired, the measurement of the delay time is further continued (S11), and the lighting load L is kept on until the delay time expires (S12) (S13). If the delay time has expired without turning off the lighting load L, the number of times of detection is increased by 1 (S14).

(Embodiment 3) The present embodiment is another configuration for reducing the stress caused by the lighting load L being repeatedly turned on and off, and the lighting load L is set to the full lighting state by a contact input from the outside. The one that can switch between the dimming lighting state is used. An example of this type of lighting load (lighting fixture) L is a lighting load L that uses a fluorescent lamp as a light source and includes a ballast, and the light output of the fluorescent lamp can be selected by selecting a tap provided on the ballast by contact input. There is one that can be switched in stages.

In order to control such a lighting load L,
As shown in FIG. 5, as the switch element 3, the lighting load L
Is provided with a switch element 3a for turning on and off, and a switch element 3b that is connected to the tap of the ballast and switches the light output of the lighting load L in two stages. Switch element 3a,
Reference numeral 3b is a contact of each separate latching relay Rya, Ryb, and each latching relay Rya, Ryb is an auxiliary contact ra, r which is turned on together with the switch elements 3a, 3b.
b is also provided. When the auxiliary contacts ra and rb are turned on, the input to the signal processing unit CN composed of the microcomputer configuring the control unit 2 and the timer 4 becomes L level, and the switch element 3a, which is a contact of the latching relays Rya and Ryb, The open / closed state of 3b can be known. Power supply to the signal processing unit CN is a transformer T for stepping down commercial power, a diode bridge DB for full-wave rectification,
Power is supplied from a power supply circuit 7 including a smoothing capacitor C and a stabilized power supply unit RG. Also, the latching relay Ry
Power supply for driving a and Ryb is supplied from both ends of the smoothing capacitor C.

The heat ray sensor 1 comprises a sensor portion 1a and a sensor input portion 1b which generates a detection output based on the output of the sensor portion 1a, and the presence of a person in the detection area of the heat ray sensor 1 is detected. In the signal processing unit CN including the microcomputer, the switch element 3b, which is the contact of the latching relay Ryb, is turned on. In the present embodiment, the switch element 3a is always kept on after the power is turned on, and the lighting load L is kept in a constant lighting state. Therefore, the illumination load L is in the dimming lighting state during the period in which the switch element 3b before the person is detected is off, and the light output is 10 when the switch element 3b is turned on in response to the person's detection.
The lighting load L is lit in the fully lit state with 0%. After that, when a certain delay time elapses, the switch element 3b is turned off, and the lighting load L returns to the dimming lighting state in which the light output is reduced.

The operation is summarized as shown in FIG. First, when the power is turned on, it is determined whether or not a person is detected by the heat ray sensor 1 (S1), and when a person is detected, the timer value is reset and the signal processing unit CN starts measuring the delay time (S2 to S4). ). While the delay time is being measured, the lighting load L is turned on in the full lighting state (S5). When the delay time has elapsed (S3), the lighting load L is turned on in the dimming lighting state (S6).

At the time of construction, as shown in FIG. 7, a case 8 accommodating the heat ray sensor 1, the switch elements 3a and 3b, the signal processing unit CN and the power supply circuit 7 is attached to a ceiling or the like,
The lighting load L may be connected via the four connecting lines 9.
As described above, the lighting load L is normally lit in the dimming lighting state, and when the person is detected, the lighting load L is lit in the full lighting state for a certain period of time. When it is used for such a case, it has an advantage that power is saved by dimming the light when there is no traffic, as compared with the conventional case where the light is always turned on in the full lighting state. Moreover, since the switch elements 3a and 3b are the contacts of the latching relays Rya and Ryb, they are turned on.
The current flows through the coil only when it is switched off,
This also leads to power saving, and since the lighting load L only repeats the full lighting state and the dimming lighting state after the power is turned on, the lighting load L is repeatedly turned on and off every time a person is detected. The life of L becomes long. Further, even when there is no traffic, the light is turned on in a dimmed state instead of being turned off, so that the surroundings can be seen to some extent and the anxiety is not given. When used for lighting stairs, compared to the case where the lighting load L is turned off when a person is not detected, it is possible to prevent the danger caused by walking on the stairs before the lighting load L is turned on. .

The signal processing unit CN may control the delay time for switching from the full lighting state to the dimming lighting state as in the first and second embodiments. (Fourth Embodiment) In the third embodiment, the switch elements 3a and 3b are used for switching between the full lighting state and the dimming lighting state, but in this embodiment, the high frequency inverter is configured to light the fluorescent lamp. An example of switching the lighting load L between the full lighting state and the dimming lighting state will be shown. Here, the high-frequency inverter uses an inverter that can change the power supply to the fluorescent lamp by changing the on / off duty ratio of the switching element.

Therefore, in this embodiment, as shown in FIG. 8, by controlling the duty ratio of the output of the control circuit 10 for controlling the on / off of the switching elements of the high frequency inverter, the lighting load L is fully turned on. Is switched to the dimming lighting state. The control circuit 10, after stepping down the commercial power supply transformer T _1, smoothed by the smoothing capacitor C ₁ as well as full-wave rectified by the diode bridge DB _1, a power supply which is stabilized by three-terminal regulator RG _1. The reference voltage obtained from this power source using the Zener diode ZD ₁ and the resistors R ₁ and R ₂ is compared with the voltage across the capacitor C ₂ by the comparator CP ₁ . The comparator CP ₁ is provided with a resistor R ₀ connected between the input and output, and a hysteresis is provided so that the reference voltage is lowered when the output becomes L level. The capacitor C ₂ is connected from the power source to the transistor Q ₁ , the resistor R ₃ ,
It is charged through the diode D _{1 and} discharged through the resistors R ₄ and R ₅ . The base of transistor Q ₁ is connected to the connection point of the resistors R _6, R _7, the resistors R _6, a series circuit of R ₇ transistor Q ₂ of the phototransistor PT and the switching a light receiving element of the photocoupler PC
Is connected in series to the collector-emitter of the power source and the series circuit is connected between both ends of the power supply. Moreover, the base of the transistor Q ₂ is connected to the output terminal of the comparator CP _2, and compares the voltage across the output and the Zener diode ZD ₁ of the comparator CP ₂ in the comparator CP _1. Emitting diode PE is a light emitting element of the photocoupler PC, the collector of the transistor Q ₃ which conducts both are controlled by the output of the signal processing unit CN - are connected in series to the emitter.

However, when the power is turned on, the capacitor C ₂
Is not charged, the output of comparator CP ₁ is H
Then, the output of the comparator CP ₂ also becomes H level, and the transistor Q ₂ is turned on. Photo coupler P
The phototransistor PT of C is always conductive when the power is turned on, but during the period when no person is detected by the heat ray sensor 1, in the signal processing unit CN, the conduction amount of the transistor Q ₃ is reduced to reduce the light emission luminance of the light emitting diode PE. I keep it low. Therefore, the conduction amount of the phototransistor PT is also small. As a result, the transistor Q ₂ is on, but the amount of current passing between the collector and the emitter of the transistor Q ₁ is small, and the terminal voltage of the capacitor C ₂ reaches the voltage at the connection point of the resistors R ₁ and R _2. It will take a relatively long time. When the terminal voltage of the capacitor C ₂ reaches the voltage at the connection point of the resistors R ₁ and R ₂ , the output of the comparator CP ₁ becomes L level, the output of the comparator CP ₂ also becomes L level, and the transistor Q ₂ is turned off. Become. That is, the transistor Q _{1 is} also turned off and the capacitor C ₂ is discharged through the resistors R ₄ and R ₅ . When the terminal voltage of the capacitor C ₂ decreases to the reference voltage set by the resistors R ₀ to R _2, the transistor Q ₁ is turned on again, the charging of the capacitor C ₂ is started. As described above, by repeatedly charging and discharging the capacitor C ₂ , the control output is taken out from the both ends of the resistor R ₃ to the high frequency inverter.

When a person is detected by the heat ray sensor 1, the transistor Q ₃ is completely turned on, and the light emitting diode P
E is turned on with high brightness to bring the phototransistor PT into full conduction. That is, the amount of conduction when the transistor Q ₁ is on also increases, and the charging time of the capacitor C ₂ is shortened. Therefore, the ON period of the control output of the high frequency inverter is shortened.

The heat ray sensor 1, the signal processing unit CN, and the power supply circuit 7 are configured in the same manner as in the third embodiment, and the output of the signal processing unit CN is used to output the signal to the high frequency inverter via the photocoupler PC as a switch element. By changing the duty ratio of the control signal, the lighting load L can be switched between the full lighting state and the dimming lighting state. Here, it is the same as in the third embodiment that all lights are turned on for a certain delay time after a person is detected and light is turned on in other periods. However, at the time of construction, as shown in FIG. 9, the connection line 9 between the body 8 and the lighting load L is 2
Become a line.

(Fifth Embodiment) In the third and fourth embodiments, the illumination load L using the fluorescent lamp has been illustrated, but in the present embodiment, the case where the incandescent light bulb is used as the illumination load L will be described. In the present embodiment, as shown in FIG. 10, the configuration for changing the power supplied to the lighting load L is a phase control system and is provided separately from the lighting load L. That is, the known dimming circuit 16 using the triac TA is provided, and the conduction angle of the triac TA is controlled by the signal processing unit CN.
The signal processing unit CN uses the triac TA based on the zero-cross point of the commercial power source input from the zero-cross detection circuit 17.
Control the conduction angle of. The conduction angle of the triac TA is controlled via the photocoupler PC ₁ controlled by the signal processing unit CN. As described above, the full lighting state and the dimming lighting state of the lighting load L are performed by the control of the triac TA from the signal processing unit CN, so that only one latching relay Rya is provided to turn on / off the lighting load L. Only the switch element 3a to be controlled is provided, and the switch element 3b is unnecessary. Further, since the lighting load L is always turned on, an off switch SF for instructing the signal processing unit CN to forcibly turn off the light load L is added.
The heat ray sensor 1 and the power supply circuit 7 are the same as those in the third embodiment.

Also with this configuration, when a person is detected, the triac TA is controlled so that the lighting load L is fully turned on for a certain delay time and the lighting load L is dimmed and turned on during other periods. Of. With this control, the operation is similar to that of the third embodiment. Further, at the time of construction, as shown in FIG. 11, the body 8 accommodating the circuit portion excluding the lighting load L, which is an incandescent light bulb, is attached to the ceiling, and the body 8 and the lighting load L are connected by two connecting lines. Can be connected.

(Embodiment 6) This embodiment is an example in which an incandescent lamp is used as the lighting load L as in the case of the fifth embodiment. As shown in FIG. 12, the lighting load L is an inverter as a dimming circuit. By turning on the light by 18, the inverter 18 is controlled to switch between the full lighting state and the dimming lighting state. In this configuration, since the incandescent light bulb as the illumination load L is supplied from the inverter 18, two lines may be used for the commercial power source and two lines for the illumination load L as the connection line. This makes it possible to carry out the same construction as in the shown Example 5. Also, the signal processing unit C
N directly controls the inverter 18 so that the lighting load L
The configuration is simplified because the switch is switched between the full lighting state and the dimming lighting state. The configurations of the heat ray sensor 1, the signal processing unit CN, and the power supply circuit 7 are the same as those in the third embodiment.

[0036]

According to the invention of claim 1, the timer is provided with the time variable portion for extending the delay time as the number of times of detecting the person per unit time increases. Therefore, when the frequency of detecting the person is relatively high, the delay time is increased. By extending the lighting load, the next person can be detected by the heat ray sensor while the lighting load is not turned off, and the lighting load turns on and off relatively less frequently, resulting in less stress on the lighting load. Therefore, there is an advantage that the life of the lighting load can be extended.

The invention of claim 2 is provided with a memory for storing the day of the week and the time input from the input section in association with the delay time, and the current time measured by the clock section is stored in the memory. Since the corresponding delay time stored in the memory is used when the time and the time match, the day and time that are known to be frequently used are controlled by the delay time stored in the memory.
This has an advantage that the frequency of turning on / off the lighting load can be further reduced as compared with the configuration of claim 1.

According to a third aspect of the present invention, the day of the week and the time at which the number of times a person is detected per unit time exceeds a prescribed threshold value are stored in the memory in association with the delay time obtained by the time variable unit at that time. , If the current time measured by the clock unit matches the day of the week and time stored in the memory, the delay time stored in the memory is used, so the memory is delayed according to the frequency of human detection at each time on each day. Since the time is automatically registered, the delay time is learned for the day of the week and the time when the frequency of human detection exceeds the threshold value. In short, there is an advantage that an appropriate delay time is set without the need to manually input the delay time.

According to the invention of claim 4, when the switch element is turned on, the lighting load is fully lit and when the switching element is off, the lighting load is dimmed and lit. Therefore, the lighting load is not extinguished, and the extinguished state is changed to the lit state. Since there is no stress caused by, the stress on the lighting load is relatively low even when the frequency of human detection is relatively high, and the life of the lighting load is extended. Moreover, when the lighting load is used for street lights, it dims the light when people are not passing through to reduce power consumption, but gives a sense of anxiety to passersby when it is completely turned off and dark. If it is used for lighting stairs or corridors, there is an advantage that the foot can be seen even during the period from when a person is detected to when the lighting load is fully turned on, resulting in higher safety.

According to the fifth aspect of the invention, the lighting load is fully lit only within the delay time after a person is detected, and the dimming lighting is performed in other periods. It is said that there is no stress caused by repeatedly turning off the lights, the life of the lighting load is long, it is energy saving when used for street lights and does not cause people to feel uneasy, and it can be used safely for lighting of stairs and corridors. There are advantages. In addition, a dimming circuit is provided that turns on the lighting load for a specified delay time when the human body is detected by the heat ray sensor, and dims the lighting during other periods, so dimming can be performed by external control. There is also an advantage that it can be applied even when a lighting load that does not exist is used.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment.

FIG. 2 is a perspective view showing a construction state of the first embodiment.

FIG. 3 is an operation explanatory diagram of the first embodiment.

FIG. 4 is a block diagram showing a second embodiment.

FIG. 5 is a circuit diagram showing a third embodiment.

FIG. 6 is an operation explanatory diagram of the third embodiment.

FIG. 7 is a perspective view showing a construction state of a third embodiment.

FIG. 8 is a circuit diagram showing a fourth embodiment.

FIG. 9 is a perspective view showing a construction state of Example 4;

FIG. 10 is a circuit diagram showing a fifth embodiment.

FIG. 11 is a perspective view showing a working state of Example 5;

FIG. 12 is a circuit diagram showing a sixth embodiment.

[Explanation of symbols]

 1 heat ray sensor 3 switch element 3a switch element 3b switch element 4 timer 11 time variable section 12 input section 13 memory 14 clock section 15 delay control section AC commercial power supply L lighting load

Claims (5)

[Claims] 1. A heat ray sensor for detecting a heat ray from a human body within a detection area, a switch element which is turned on when the human body is detected by the heat ray sensor and is turned off after a predetermined delay time, and the delay time is defined. And a lighting load connected to the power supply via a switch element, the timer
A heat ray detection type illumination load control system comprising a time variable unit for extending the delay time as the number of times of human detection per unit time increases. 2. The timer comprises a clock section for measuring the day of the week and the time, an input section for inputting the delay time in association with the day of the week and the time, and a day of the week and the time and the delay time inputted from the input section. And a delay control unit that employs the delay time stored in the memory when the current time measured by the clock unit matches the day of the week and the time stored in the memory. The heat load detection type lighting load control system according to claim 1. 3. The timer comprises a clock section for clocking the day of the week and the time, and a delay for the day and time when the number of times of human detection per unit time exceeds a prescribed threshold value at that time by the time varying section. A memory for storing the time in association with the time; and a delay controller for adopting the delay time stored in the memory when the current time measured by the clock matches the day of the week and the time stored in the memory. Claim 1
The heat ray detection type lighting load control system described. 4. A heat ray sensor for detecting a heat ray from a human body within a detection area, a switch element which is turned on when the human body is detected by the heat ray sensor and is turned off after a predetermined delay time, and the delay time is defined. And a lighting load connected to a power source through a switch element, and the lighting load is fully lit when the switch element is on and dimmed when the switch element is off. . 5. A heat ray sensor for detecting heat rays from a human body within a detection area, a lighting load, and when the human body is detected by the heat ray sensor, the lighting load is fully turned on for a predetermined delay time and adjusted for other periods. A heat ray detection type illumination load control system comprising a light control circuit for turning on light and a timer for defining the delay time.