JP2010153083A - Lighting control system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting control system in which the illumination state of all lamps which obtain a drive current from a DC power supply is collectively changed by a one-two switch operation and all the lamps are simultaneously turned off, when the DC power supply is turned off by a package switch. <P>SOLUTION: The lighting control system 100 is provided with a plurality of lighting control devices k (k=1, 2,..., n) which are connected to a DC power supply 50 of DC 100 V that supplies a drive current and a lamp L<SB>k</SB>and relays the drive current supplied from the DC power supply 50 to the lamp L<SB>k</SB>, and a package switch SW1 which switches over On-Off of an electrical path to connect each of the plurality of lighting control devices k and the DC power supply 50. Furthermore, each of lighting control devices k is provided with an FET Q1 and a CPU 10, which turn On and Off the drive current supplied to the lamp L<SB>1</SB>. Then, the CPU 10 makes the FET Q1 go into an On state or to an Off state, corresponding to a blackout time t by the one-two switching operation. Thereby, illumination state of all lamps L<SB>k</SB>is collectively. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a lighting control system that turns on and off a plurality of lamps collectively by operating a batch switch.

2. Description of the Related Art Conventionally, a lighting control system in which a switch is provided on a wall of a room where a single lighting device is installed, and a driving current supplied to the single lighting device from a commercial AC power source is turned on and off by the switch has been widely used. .
In this lighting control system, a user operates a switch to turn on or off one lighting device or change a load state mode.
Patent Document 1 discloses an illumination control system that changes the mode of a load state by a one-two switch operation on a dedicated power switch provided between an AC commercial power supply and a lighting device.
Japanese Patent Laid-Open No. 9-223584

  However, in the conventional lighting control system, it is not assumed that a plurality of lighting devices are turned on or off all at once with a batch switch, and the load state mode of the plurality of lighting devices is assumed to be a one-to-switch operation for the batch switch. Even if it is changed at, the following problems occur. That is, there is a variation in the measurement of the off time of the collective switch among the lighting devices, and even if several of the lighting devices change modes, the remaining lighting devices may not change mode.

  An object of the present invention is to provide an illumination control system that collectively changes the illumination state of all lamps that obtain drive current from a DC power supply by a one-to-switch operation.

  The lighting control system of the present invention has the following configuration in order to solve the above problems.

(1) DC power supply,
A lighting control device connected to the lamp, wherein a plurality of lighting control devices for controlling a drive current supplied from the DC power source to the lamp;
A collective switch for switching on and off an electric circuit connecting each of the plurality of lighting control devices and the DC power source, and a lighting control system comprising:
Each of the plurality of lighting control devices includes:
A switch element for turning on and off the drive current supplied to the lamp;
A control circuit for monitoring an input voltage input from the DC power supply via the collective switch, and measuring an off time of the DC power supply by the collective switch based on the input voltage;
A dedicated switch for accepting on / off switching of the switch element,
The control circuit is characterized in that the switch element that is turned on or off by the dedicated switch is turned on or off according to an off time of the DC power source by the collective switch.

  In this configuration, it is assumed that the user performs a one-to-two switch operation on the collective switch. The one-two switch operation is an operation in which the DC power source is turned off with the collective switch and the DC power source is turned on again with the collective switch within a specified time. Further, the switch element is constituted by a transistor, for example. The lamp is composed of, for example, an LED, a fluorescent lamp with a built-in DC-DC converter, or a light bulb.

  In this configuration, when the user turns off the DC power supply with the collective switch, the input voltage decreases. At this time, the control circuit included in each of the plurality of lighting control devices starts measuring the off time of the DC power supply. When the user turns on the DC power source again with the collective switch, the input voltage is restored. The control circuit included in each of the plurality of lighting control devices sets the switch element to an on state or an off state in accordance with the off time of the DC power supply applied up to this time. For the measurement of the off time, a control circuit constituted by a CPU or the like is used to suppress detection variations among the lighting control devices. Therefore, the lamps connected to each of the plurality of lighting control devices are turned on or off all at once.

As described above, the illumination state of all the lamps that obtain the drive current from the DC power supply can be changed at a time by the one-two switch operation.
In addition, the user can change the lighting state of the lamp of his / her seat to a desired state by operating a dedicated switch. Furthermore, even if the illumination states of the lamps are different from each other, the illumination states of all the lamps can be changed to the same illumination state at a time by a one-two switch operation.

(2) The control circuit includes:
When the off time of the DC power source is within the second time from the first time, the switch element is turned on,
When the off time of the DC power supply is longer than the second time, the switch element is turned off, and the switch element is kept off even when the collective switch is turned on again.

In this configuration, the state of the switch element corresponding to the off time of the DC power supply is clearly shown.
In this configuration, when the off time of the DC power source is within the second time from the first time, the switch elements are turned on, that is, all the lamps are turned on.
On the other hand, when the off time of the DC power supply is longer than the second time, the switch elements are turned off, that is, all the lamps are turned off.

(3) The control circuit includes:
Count the number of times that the batch switch was operated so that the off time of the DC power supply is within the second time from the first time,
When the number of times becomes a predetermined number of times or more within a predetermined time, after the switch element is turned on, switching of the switch element by the dedicated switch is prohibited.

In this configuration, it is assumed that the one-two switch operation is continuously performed a predetermined number of times. The predetermined number of times is, for example, twice.
In this configuration, when the control circuit prohibits switching of the switch element by the dedicated switch, the illumination state of each lamp does not change even if any of the dedicated switches is operated.
Thereby, for example, in a scene where an emergency occurs in a train, an airplane, an office, etc., even if any of a plurality of dedicated switches is inadvertently operated, the lamp does not turn off. Thereby, since all the lamps can be maintained in an lit state in an emergency, a person can be safely guided to the exit.

  According to the present invention, the illumination state of all the lamps that obtain the drive current from the DC power supply can be changed simultaneously and simultaneously by a one-two switch operation.

  Hereinafter, an illumination control system according to an embodiment of the present invention will be described.

FIG. 1 is a system configuration diagram of a lighting control system according to an embodiment of the present invention. The illumination control system 100 includes a DC 100V DC power supply 50 that supplies a drive current and a plurality of illumination control devices k (k = 1) that control the illumination state of the lamp L _k (k = 1, 2,..., N). ,..., N) and a collective switch SW1 for switching on and off the electric circuit connecting each of the plurality of lighting control devices k and the DC power source 50. In the illumination control system 100, the lamp _Lk is installed for illumination in, for example, each seat in each train vehicle, each desk in the office, each seat in an airplane, and the like. The lamp L _k is composed of, for example, a fluorescent lamp with a built-in DC-DC converter or an LED array. The collective switch SW1 is attached to, for example, the wall of the leading vehicle if it is a train, the wall of the room where the lamp _Lk is installed if it is an office, or the wall around the boarding gate if it is an airplane. With this lighting control system 100, a manager (cleaner or the like) of this system operates the batch switch SW1 to turn on or turn off all the lamps L _k (k = 1 to n) at a time. The administrator changes collectively by one-two switch operation of the collective switch SW1 lighting state of the plurality of lamps L _k to obtain a driving current from the DC power source 50.

Each of the plurality of lighting control device k, is connected to the lamp L _k, relays the drive current supplied from the DC power supply 50 to the lamp L _k. Further, each of the plurality of lighting control device k, dedicated switch SWk accepts the switching of the lighting state of the lamp L _k unlit + 1 (k = 1,2, ··· , n) are provided .

  Here, since each lighting control device k shown in FIG. 1 has the same configuration, the lighting control device 1 (that is, k = 1) will be described as a representative of all the lighting control devices k. FIG. 2 is a circuit diagram showing a main configuration of the lighting control apparatus according to the embodiment of the present invention.

As shown in FIG. 2, the lighting control device 1 includes a DC-DC converter circuit 11 that generates a power supply voltage of 18 V by stepping down an input voltage of 100 V input from the DC power supply 50 via the collective switch SW1. a series regulator IC12 which steps down the supply voltage has been 18V generates a power supply voltage of 5V, the CPU10 driven by power supply voltage of the generated 5V, FET for turning on and off the driving current supplied to the lamp L ₁ (field provided with effect transistor) Q1, and a dedicated switch SW2 receives the switching between the oFF state and the lighting state of the lamp L _1, a.
Furthermore, the illumination control device 1 includes an inrush prevention resistor R1 in order to suppress an inrush current when the collective switch SW1 is turned on. This reduces the electrical stress applied to the collective switch SW1 when a plurality of lighting control devices k (k = 1 to n) are connected to the DC power supply 50 via the collective switch SW1. In addition, an LCR filter for suppressing harmonics is provided at the front stage of the resistor R1, a backflow prevention diode is provided at the rear stage of the resistor R1, and a large voltage for holding the power supply voltage of the CPU 10 for a predetermined time after the collective switch SW1 is turned off. An aluminum electrolytic capacitor C2 having a capacity is provided.
The reason why Q1 is constituted by FET is to minimize power loss, and may be constituted by other elements at the time of implementation.

  CPU10 is a control circuit which controls operation | movement of each part of the illumination control apparatus 1 main body, and incorporates the 1st timer circuit (not shown) which measures the below-mentioned power failure time t.

  The DC-DC converter circuit 11 steps down the voltage across the aluminum electrolytic capacitor C1 that becomes 100V by the input voltage input to the lighting control device 1 to a power supply voltage of 18V and outputs it. The power supply voltage is stabilized at 18 V by the aluminum electrolytic capacitor C2.

  The series regulator IC 12 steps down the voltage across the aluminum electrolytic capacitor C2 to a power supply voltage of 5V and outputs it. This power supply voltage is stabilized at 5 V by the aluminum electrolytic capacitor C3. The 5V power supply voltage is input to the CPU 10.

  The input voltage input to the illumination control device 1 is divided by resistors R2 and R3, and the divided resistors are input to the analog port A1 of the CPU 10. Thereby, the CPU 10 monitors the input voltage input to the illumination control device 1.

  The correspondence relationship between the resistance voltage dividing value and the input voltage value is adjusted in advance. In this embodiment, an input voltage value of 50 V or less corresponds to a resistance voltage division value of 1.19 V or less, and an input voltage value of 60 V or more corresponds to a resistance voltage division value of 1.43 V or more.

  The CPU 10 applies a voltage from the digital port D1 to the gate of the FET Q1 to turn on the FET Q1, or stops applying the voltage to turn off the FET Q1. More specifically, the FET Q1 is turned on when the CPU 10 turns on the transistor Q3 from the digital port D1 and turns on the transistor Q2.

The dedicated switch SW2 is a switch that accepts on / off switching of the FET Q1. When the dedicated switch SW2 is pressed, the CPU 10 detects the falling edge of the digital port D2 and performs chattering prevention processing. Thereafter, the CPU 10 recognizes that the dedicated switch SW2 has become Low, and inverts the switch state of the FET Q1. Here, each dedicated switch SWk + 1 (k = 1, 2,..., N) is installed, for example, in each seat in each train vehicle, each desk in the office, and each seat in an airplane. . Then, a passenger sitting in each seat of each vehicle in the train, an employee sitting in each desk in the office, or a passenger sitting in each seat in the airplane can switch the dedicated switch SWk + 1 (k = 1, 2,. Operate n). Therefore, the lighting state of each lamp L _k varies by dedicated switch SWk + 1 of the same subscript k is operated.

  FIG. 3 is a flowchart showing an operation performed by the CPU of the lighting control apparatus according to the embodiment of the present invention. In this operation, it is assumed that the administrator performs a one-to-two switch operation on the batch switch SW1. The one-two switch operation is an operation of turning off the collective switch SW1 and turning on the collective switch SW1 again within a specified time. Further, 0.2 second corresponds to the “first time” of the present invention, and 1.0 second corresponds to the “second time” of the present invention.

When the collective switch SW1 is turned on, the CPU 10 determines whether or not the input voltage is 50 VDC or less from the value of the resistance voltage divided input to the analog port A1 (S1). When the input voltage is higher than DC50V, the CPU 10 recognizes that the current is in an energized state (S11), and maintains the on or off state of the FET Q1 (S12). Thereby, the illumination state of the lamp L ₁ does not change. If it is determined that the dedicated switch SW2 is switched (S13), CPU 10 inverts the switching state of the FET Q1 (i.e. from the ON state to the OFF state or from the OFF state to the ON state), changing the lighting state of the lamp _{L 1} (S14). On the other hand, if it is determined that the dedicated switch SW2 has not been switched (S13), the CPU 10 maintains the switch state of the FET Q1 (S15). Then, after S14 or S15, the CPU 10 returns to S1. In this way, the lighting conditions of the lamp L _k varies by dedicated switch SWk + 1 of the same subscript k is operated.

Here, the change of the illumination state of each lamp according to the operation timing of the collective switch SW1 will be described with reference to FIG. FIG. 4 is a diagram illustrating an example of changes in the illumination state of the _three lamps L ₁ , L ₂ , and L ₃ depending on the operation timing of the collective switch SW1.

First, it is assumed that the illumination state of each of the lamps L ₁ , L ₂ and L ₃ immediately before the collective switch SW1 is turned off is the state shown in FIG. When the user turns off the collective switch SW1 in this state, the input voltage becomes DC 50V or less, and the resistance divided value input to the analog port A1 becomes 1.19V or less.

As a result, the CPU 10 recognizes that the power failure state of S1 is positive (S2), and starts measuring the power failure time t in the first timer circuit (S3). Then, when the administrator turns on the DC power supply 50 again with the collective switch SW1, the input voltage rises to DC 60V or more and becomes energized. In accordance with the power failure time t, the CPU 10 turns the FET Q1 on or off as shown in FIGS. 4 (B1), (C1), and (C2).
Note that even if the collective switch SW1 is turned off, electric charges remain in the electrolytic capacitors C1, C2, and C3, so that the CPU 10 can be driven for a while after the collective switch SW1 is turned off. In order to achieve this driving, a large-capacity electrolytic capacitor C2 (2200 μF) is provided in this embodiment.

CPU10 determines whether it became DC60V or more within 0.2 second (S4). When it is determined that reaches or exceeds DC60V within 0.2 seconds, CPU 10 does not change the lighting conditions of the lamp _{L 1,} i.e. to maintain the on or off state of the FET Q1 (S5), the process proceeds to S13. Thereby, the illumination state of each lamp _{L 1,} L 2, _{L 3} is in the state shown in FIG. 4 (B1).

On the other hand, if it is determined that not become more DC60V within 0.2 seconds, CPU 10 is to the FETQ1 in the OFF state (S6), the lamp _{L 1} to OFF state. Here, the illumination states of the lamps L ₁ , L ₂ , and L ₃ are all turned off as shown in FIG. 4 (B2). The reason for turning off the light after 0.2 seconds has elapsed is to suppress the current consumption of the drive circuit that turns on the FET Q1 and to secure the power supply voltage of the CPU 10 during the off-period of the batch switch SW1.

When 0.2 seconds have passed, the CPU 10 determines whether or not the voltage has become DC 60 V or more within 1 second (S7). When it is determined that reaches or exceeds DC60V within one second, CPU 10 is to the FETQ1 in the ON state (S8), the lamp _{L 1} to the lighting state. Here, the illumination state of each of the lamps L ₁ , L ₂ and L _{3 is changed from} the state shown in FIG. 4 (B2) to the fully lit state shown in FIG. 4 (C1). Further, after S8, the CPU 10 proceeds to S13.

  On the other hand, if it is determined that the voltage has not reached 60 V DC within 1 second, the CPU 10 maintains the FET Q1 in the off state (S9).

  Then, after 1 second has elapsed, the CPU 10 determines whether or not the input voltage is DC 60 V or more (S10). If the collective switch SW1 is turned on after 1 second has elapsed in the fully extinguished state shown in FIG. 4B2, the input voltage becomes DC 60V or higher, and the resistance divided value input to the analog port A1 becomes 1.43V or higher. .

Thereby, CPU10 recognizes that it became the energization state of determination affirmation of S10 (S11). Then, CPU 10 maintains the ON or OFF state of the FET Q1 (S12), does not change the lighting conditions of the lamp _{L 1.} Therefore, the illumination state of each of the lamps L ₁ , L ₂ , and L ₃ remains unchanged from the all-off state shown in FIG. 4 (B2) and remains in the all-off state shown in FIG. 4 (C2). Thereafter, the CPU 10 performs the above-described operations from S11 to S15.
In addition, although CPU10 resets the timer of a 1st timer circuit between S12 and S13, illustration is abbreviate | omitted in FIG.

As described above, the illumination state of all the lamps L _k (k = 1 to n) that obtain the drive current from the DC power supply 50 can be changed at once by a one-to-switch operation (see FIGS. 4C1 and C2).

Further, the user can change only the switch SWk + 1 (k = 1,2, ···, n) by operating the lighting state of the lamp L _k of his seat to a desired state (FIG. 4 (See (A)). Moreover, be different for each illumination state of each lamp L _k as shown in FIG. 4 (A), the same lighting conditions at once illuminated state by the one-two switch operation of the entire lamp L _{k (k} = 1 to n) (See FIGS. 4C1 and 4).

  Moreover, the following modifications can be employed in the embodiment of the present invention.

  The CPU 10 shown in FIG. 2 further includes a counter (not shown) that counts the number of counts and a second timer circuit (not shown) that measures time to determine 2 seconds described later.

  FIG. 5 is a flowchart showing an operation performed by the CPU of the lighting control apparatus which is a modification of the embodiment of the present invention. This operation is an operation in which S101 to S106 are added to the operation of FIG. 3, and the other processes (S1 to S15) are the same. In this operation, it is assumed that the administrator performs the one-two switch operation twice in an emergency.

  After S3, the CPU 10 starts measuring time in the second timer circuit (S101).

If it is determined in S7 that the voltage has become DC 60V or more within 1 second, the CPU 10 increases the count number of the counter by 1 (S102), and then turns on the FET Q1 (S8). Here, the illumination state of each of the lamps L ₁ , L ₂ and L _{3 is changed from} the state shown in FIG. 4 (B2) to the fully lit state shown in FIG. 4 (C1).

  The CPU 10 determines whether or not the count number of the counter has reached a predetermined number (two times in this embodiment) within 2 seconds (S103, S104). When the count number does not exceed the predetermined number within 2 seconds, the CPU 10 resets the timer of the first timer circuit (S105), and returns to S1.

If the count is equal to or greater than the predetermined number within 2 seconds, the CPU 10 invalidates the operation of the dedicated switch SW2 (S106) and returns to S1. Thereafter, the CPU 10 ignores the operation of the dedicated switch SW2 and prohibits the on / off switching of the FET Q1. Therefore, in the context of emergency in such as a train or an airplane or in the office occurs, even if inadvertently one of the dedicated switch SWk + 1 is operated, lamp L _k is not turned off. Accordingly, it is possible to maintain full lamp L _k in the full lighting state in an emergency, it is possible to safely induce human outlet.
If the timer of the second timer circuit has passed 2 seconds, the CPU 10 resets the timer and counter of the first and second timer circuits, and proceeds to S13.

The system block diagram of the illumination control system which is embodiment of this invention The circuit diagram which shows the main structures of the illumination control apparatus which is embodiment of this invention The flowchart which shows the operation | movement which CPU of the illumination control apparatus which is embodiment of this invention performs. The figure which shows an example of the change of the illumination state of each lamp by the operation timing of a batch switch The flowchart which shows the operation | movement which CPU of the illumination control apparatus which is a modification of embodiment of this invention performs.

Explanation of symbols

1, 2, 3,..., N ... Lighting control device 10 ... CPU
11 ... DC-DC converter circuit 12 ... Series regulator IC
50 ... DC power source 100 ... lighting control system _{L 1, L 2, L 3} , ···, L n ... lamp SW1 ... collective switches SW2, SW3, SW4, ···, SWn + 1 ... dedicated switch

Claims (3)

DC power supply,
A lighting control device connected to the lamp, wherein a plurality of lighting control devices for controlling a drive current supplied from the DC power source to the lamp;
A collective switch for switching on and off an electric circuit connecting each of the plurality of lighting control devices and the DC power source, and a lighting control system comprising:
Each of the plurality of lighting control devices includes:
A switch element for turning on and off the drive current supplied to the lamp;
A control circuit for monitoring an input voltage input from the DC power supply via the collective switch, and measuring an off time of the DC power supply by the collective switch based on the input voltage;
A dedicated switch for accepting on / off switching of the switch element,
The lighting control system, wherein the control circuit sets the switch element in an on state or an off state by the dedicated switch to an on state or an off state according to an off time of the DC power source by the collective switch. The control circuit includes:
When the off time of the DC power source is within the second time from the first time, the switch element is turned on,
The switch element is turned off when the off time of the DC power supply is longer than the second time, and the switch element is kept off even when the collective switch is turned on again. The lighting control system described. The control circuit includes:
Count the number of times that the batch switch was operated so that the off time of the DC power supply is within the second time from the first time,
3. The switch element according to claim 1, wherein when the number of times becomes a predetermined number of times or more within a predetermined time, the switch element is turned on and then the on / off switching of the switch element by the dedicated switch is prohibited. The lighting control system described.

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