JPH035035B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of the Invention] The present invention relates to a lighting control system that centrally controls a large number of lighting loads from a main operation panel via a plurality of terminals, and particularly relates to a lighting control system that centrally controls a large number of lighting loads from a main operation panel via a plurality of terminals, and in particular, The present invention relates to a system that controls illuminance according to changes.

[Background of the Invention] Conventionally, lighting control systems are known that centrally control one or more lighting loads connected to each of a plurality of terminals based on control signals from a main operation panel. The brightness of lamps used as lighting loads in such systems changes over time. For this reason, in conventional lighting control systems, the illuminance of all lighting loads is manually adjusted at once according to the time that has passed since the lamp was replaced.

However, in this conventional form,
Manual illuminance adjustment requires unnecessary manpower and is inconvenient in that precise illuminance settings cannot be made. Furthermore, the conventional system has the disadvantage that illuminance control can only be performed when all or almost all of the lamps in the lighting load are replaced at once.

[Summary and Object of the Invention] In view of the above-mentioned problems with the conventional type, the object of the present invention is to provide a lighting control system in which a main operation panel or the like has a built-in means for controlling illuminance in response to changes in lamps over time. Based on the concept, illuminance control that corresponds to secular changes in lighting loads is automatically performed to save labor, and illuminance control can be performed for each group to enable highly accurate illuminance adjustment. The aim is to suppress unnecessary power consumption.

The present invention comprises a main operation panel and a plurality of terminals connected to the main operation panel via transmission lines and each connected to one or more lighting loads, and control signals transmitted from the main operation panel. In a lighting control system that controls the operation of each lighting load,
The present invention is characterized in that the main operation panel is provided with means for storing a control sequence for controlling illuminance in response to secular changes in the brightness of lamps of the lighting load, and a switch for starting the sequence.

[Description of Examples] Examples of the present invention will be described below with reference to the drawings.
FIG. 1 shows the configuration of a lighting control system according to an embodiment of the present invention. The system in the figure includes a main operation panel 1, a plurality of terminals 3-1, 3-2, ..., 3-n connected to the main operation panel 1 via a transmission line 2, and a single terminal connected to each terminal. Alternatively, it is composed of a plurality of lighting loads 4, lamp exchange switches 5-1, . . . , 5-m, optical sensors 6, and the like.

In the system shown in FIG. 1, a main operation panel 1 has a processor and a memory device (not shown), and controls lighting, turning off, and dimming of lighting loads connected to each terminal according to a program stored in the memory device. Do this. Each terminal 3-1, 3-2,...,3
-n includes a circuit that receives control signals from the main operation panel 1 via the transmission line 2, and controls each lighting load 4, i.e., turns on, turns off, and so on based on the received control signals.
It is also equipped with a circuit for controlling light, etc. The illuminance of each lighting load is controlled by, for example, adjusting the flow angle of the power source using a thyristor or the like in accordance with a control signal.

In the system shown in FIG. 1, a processor in the main operation panel 1 sends control signals to each terminal 3-1, 3-2, ..., 3-n according to the illuminance detected by the optical sensor 6. Controls each lighting load. For example, when the illuminance is within a predetermined range, dimming control is performed according to the output of the optical sensor 6, and when the illuminance is brighter than the predetermined range, the lighting load is turned off; If it is darker than a predetermined range, the brightness of the lighting load is kept at the highest level.

Incidentally, the brightness of the lamps constituting each lighting load 4 changes over time. For example, in the case of an incandescent lamp, as shown by the solid line in FIG. 2, the brightness Lx is highest at To when new, and the brightness decreases as the usage time increases. Incidentally, in FIG. 2, time _T1 indicates the time when the lamp was replaced, and the brightness increases again at this time _T1 . In order to deal with such secular changes in the lighting load, in the system shown in FIG. There is. This correction data is, for example, an illuminance setting value that is stored in correspondence with the usage time of the lamp. With such correction data, the actual illuminance setting value can be changed depending on the usage time of the lamp, for example, as shown by the dotted line in FIG. Through control using such correction data, the actual illuminance is maintained at a value close to the appropriate illuminance level La for a long period of time.

The main operation panel 1 is further provided with lamp replacement switches 5-1 and 5-m, which are pressed down when replacing the lamp. These switches may be provided for each terminal 3-1, 3-2, . . . , 3-n, or one lamp exchange switch may be provided for each of a plurality of terminals. Then, lamp replacement is performed all at once for the lighting loads corresponding to at least one lamp replacement switch. When the lamp replacement switch is pressed, a lighting control sequence based on the correction data is started, and thereafter, even if the output of the optical sensor 6 is the same, the illuminance setting value is adjusted according to the usage time of the lamp, and changes in illuminance due to secular changes in the lighting load are accurately adjusted. Corrected.

Note that the lighting load control sequence is, for example, assuming that the lamp is replaced once a year, and initially setting the illuminance to 70% of the maximum illumination setting value, and setting the illuminance to 85% three months after lamp replacement. After six months, the illuminance is adjusted to 100%, that is, the maximum setting value, and the illuminance is used for six months at the maximum setting value. The brightness of the lighting load is controlled by adjusting the flow angle of the power supply using a thyristor or the like in accordance with the illuminance setting value.

[Effects of the Invention] As described above, according to the present invention, by pressing the lamp replacement switch when replacing the lamp, the illuminance is automatically corrected in accordance with the aging of the lamp, so that the illuminance is always optimal. At the same time, wasteful power consumption is prevented. Furthermore, it becomes possible to replace lamps for each group corresponding to the lamp replacement switch, increasing the degree of freedom in lamp replacement.

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram showing the configuration of a lighting control system according to an embodiment of the present invention, and FIG.
The figure is a graph for explaining the illuminance correction operation in the system of FIG. 1. 1; Main operation panel, 2; Transmission line, 3-1, 3-2,
..., 3-n; Terminal, 4; Lighting load, 5-1,
..., 5-m; lamp exchange switch, 6; light sensor.

Claims (1)

[Claims] 1 Equipped with a main operation panel and a plurality of terminals connected to the main operation panel via transmission lines and connected to one or more lighting loads, each of which is controlled by a control signal transmitted from the main operation panel. In a lighting control system for controlling the operation of a load, means for storing a control sequence for controlling illuminance in response to secular changes in the brightness of a lamp of a lighting load in the main operation panel, and a switch for starting the sequence. A lighting control system characterized by being provided with.