JP2600571Y2 - Load control system - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a load control system for controlling the outputs of a plurality of loads arranged apart from each other so that the outputs become substantially equal.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4, a load control system for controlling a plurality of lighting loads 1 by a single operation device 2 is known. In this load control system,
A plurality of lighting loads 1 are connected to one operating device 2 via a signal line Ls, which is a transmission path, and a light output of a specific lighting load 1 is detected by a sensor 3 and input to the operating device 2. It is configured as follows.

The operating device 2 includes a fader 5 for setting a dimming level f ₀ (that is, output of a load). When the fader 5 is operated, data of the corresponding dimming level f ₀ is transmitted to a signal line Ls.
Is transmitted to each lighting load 1 via the. Than it is controlled dimming by the data in dimming levels f ₀ transmitted from the lighting load 1 at the operation unit 2. Further, the output of the sensor 3 for detecting the light output of the specific lighting load 1 is input to the operation device 2, and the operation device 2 corrects the dimming level f ₀ according to the output of the sensor 3, and The feedback control is performed so that the dimming level f ₀ set in the step is maintained. If this load control system is used, a large number of lighting loads 1 can be dimmed and controlled simultaneously from a distant place by one operating device 2.

However, as shown in FIG. 5, when the dimming level set by the operation device 2 is f ₀ , the light output of each lighting load 1 should theoretically be L, but actually, it is L. An output according to the theory cannot be obtained due to the characteristics and dirt of each lighting load 1, and different light outputs L ₀ , L ₁ , and L ₂ are obtained from the lighting load 1. Here, the light output is feedback-controlled by detecting the light output of the specific lighting load 1 with the sensor 3, but the variation of the light output of each lighting load 1 is not solved.

In order to solve the above problems, the present inventors have devised a load control system as shown in FIG.
In this load control system, each lighting load 1 and the operating device 2 are connected via controllers 4a and 4b, and each of the controllers 4a and 4b is provided with sensors 3a and 3b for detecting the light output of the lighting load 1. . One specific controller 4a is connected via a signal line Ls so as to receive the data of the dimming level f ₀ from the operating device 2 and transmit the detection data of the sensor 3a to the operating device 2. ,
The other controller 4b is connected to the controller 2 via the signal line Xs.

In this configuration, when the fader 5 provided on the operation device 2 is operated, the data of the corresponding dimming level f ₀ is transmitted to the controller 4a via the signal line Ls, and the lighting load connected to the controller 4a 1 is subjected to dimming control.
At the same time, data of the dimming level f ₀ is transmitted to the other controller 4b via the signal line Xs, and the lighting load 1 is turned on at the dimming level f ₀ . At this time, the light output of the illumination load 1 is detected by the sensor 3 and returned to the operation device 2. The operating device 2, transmitted via a signal line Xs output value L ₀ of the sensor 3a sent back from the controller 4a to the other controllers 4b. Here, data transmitted from the operating device 2 to the controller 4b is transmitted according to a predetermined transmission format. Upon receiving the data from the operating device 2, the controller 4b sets this data as a target value of the output of the sensor 3b,
The dimming levels f ₁ and f ₂ of the lighting load 1 are feedback-controlled so that the output value of the illumination load 1 approaches the target value. Therefore,
As shown in FIG. 7, the light output of each lighting load 1 is the sensor 3a.
Is substantially equal to the detection value L ₀ at

[0007]

In the above-described configuration, if the positional relationship between the sensors 3a and 3b and the lighting load 1 is appropriately set, the light output of each lighting load 1 can be made equal. However, in the above configuration, there is a limitation that only one controller 4a for connecting the illumination load 1 for providing the reference light output can be provided in the system. Therefore, a large number of lighting loads 1 installed in a relatively large area
Is controlled by one system, and when the area is further divided into a plurality of small areas and the lighting load 1 is turned on for each of the small areas, a reference light output is given to the small area where the lighting load 1 is to be turned on. Without the illumination load 1, there is a problem that the light output cannot be made uniform.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and it is possible to provide a plurality of loads for giving a reference value of output in one system, and thus to provide a load provided in one system. It is an object of the present invention to provide a load control system capable of setting the output of each load equally even when only a part of the load is operated.

[0009]

According to the present invention, in order to achieve the above object, a plurality of controllers connected via a transmission line and provided with respective loads are provided, and each controller detects an output of the load. A first control unit that feedback-controls an output of the load so as to reduce a difference between a target value set based on a reference signal input from the outside through a transmission path and a value detected by the sensor; The controller of the unit is provided with an operating device that generates an output setting signal according to the operation amount, and the controller to which the operating device is connected performs the first operation when a change in the load output is requested by the output setting signal from the operating device. The feedback control by the first control unit is stopped, the output of the load is set according to the manipulated variable, and the reference signal corresponding to the output of the load detected by the sensor is transmitted to the transmission line. And a second control unit.

[0010]

According to the above construction, a plurality of controllers are connected via a transmission line, and the first control unit provided in each controller has a target set based on a reference signal input from outside via the transmission line. Since the output of the load is feedback-controlled so as to reduce the difference between the value and the value detected by the sensor, the output of the load connected to each controller can be made substantially equal if a reference signal is given to each controller through a transmission line. . Here, some controllers are provided with an operating device corresponding to the operation amount, and a controller to which the operating device is connected is provided with a second control unit,
The second control unit stops the feedback control by the first control unit when the change of the output of the load is requested from the operating device, sets the output of the load according to the operation amount, and detects the output by the sensor. The reference signal corresponding to the output of the load is transmitted to the transmission line, and the reference signal corresponding to the output of the load provided in the controller is transmitted to the transmission line by the operation of the operating device. The output of the provided load can be made uniform.

That is, a plurality of controllers to which a load for giving an output reference value is connected can be provided in the system.
If the controller does not operate the operation device, the output of the load is set according to the reference signal transmitted from the other controller. When controlling a large number of loads by one system, only a part of the loads operates. Even in this case, the output of each load can be made uniform.

[0012]

In this embodiment, as shown in FIG. 1, a plurality of controllers 4a and 4b are sequentially connected via a signal line Xs, which is a transmission line, to form a signal line Xs in a loop. I have. However, other connection forms may be employed depending on the format of the signal to be transmitted.

As shown in FIG. 2, each of the controllers 4a and 4b includes a signal transmission / reception unit 11 connected to the signal line Xs, and signals transmitted and received via the signal transmission / reception unit 11 mainly include a microprocessor. The processing is performed in the control unit 10. The control unit 10 is connected to a lighting load 1 as a load, and the light output of the lighting load 1 connected to each controller 4a, 4b is a sensor 3 provided in the same controller 4a, 4b.
Is detected by Further, the control unit 10 includes a signal line Xs
An interface 12 for connecting a wall switch, a light receiving element for receiving a re-common signal, and the like so that the lighting load 1 can be turned on / off by a signal from a wall switch or a remote controller without depending on a signal transmitted. Is provided.

When the control unit 10 of each of the controllers 4a and 4b receives a later-described reference signal transmitted through the signal line Xs, it sets a target value for the detection value of the sensor 3 based on the data of the reference signal, and performs detection. The light output of the illumination load 1 is feedback-controlled so that the difference between the value and the target value becomes small. That is, when the reference signal is transmitted to the signal line Xs, the light output of the illumination load 1 is set to be equal in all the controllers 4a and 4b. Such a feedback control function is provided by all the controllers 4a, 4a.
b is provided as a first control unit.

On the other hand, in the present embodiment, one system connected through the signal line Xs is divided into _two regions A ₁ and A ₂ , and each one of the regions A ₁ and A ₂ is divided into _two regions A ₁ and A ₂ . The operating device 2 is connected to the controller 4a via a signal line Ls. When the controller 4a to which the operating device 2 is connected receives a change request when the operation amount of a fader (not shown) provided in the operating device 2 is changed, the first control unit stops the feedback control, controlling the light output of the lighting load 1 according to the dimming level f ₁ supplied from the operation unit 2 (see FIG. 3). Further, it sends a reference signal to be detected value L ₁ data at the sensor 3 in the state at this time to the signal line Xs. The function of transmitting the reference signal to the signal line Xs according to the operation of the operation device 2 is provided as a second control unit in the controller 4a.

Therefore, all the other controllers 4a and 4b except the controller 4a on which the operating device 2 is operated.
Now, as shown in FIG. 3, the sensor 3
Are setting the target value L ₁ of the detected value at each controller 4a, 4b in the dimming level corresponding to the target value L ₁ is set, the light output of all the lighting load 1 is substantially equal to It is. Here, it is assumed that the degree of variation in the detection value of each sensor 3 is sufficiently smaller than the light output of the illumination load 1. The operation unit 2 of each region A _1, A ₂
Are unlikely to be operated at the same time, and there is almost no possibility that reference signals generated based on the operations of the plurality of operating devices 2 will compete. If such a conflict becomes a problem, the conflict can be avoided by a well-known method of setting priorities and the like.

According to the above configuration, when the lighting load 1 is turned on / off for each of the regions A ₁ and A ₂ (for example, if different addresses are set for the controllers 4a and 4b,
The operation can be performed for each of the areas A ₁ and A ₂ ), and even if the lighting load 1 of one of the areas A ₁ and A ₂ is turned off,
The controller 4a to which the operation device 2 is connected is connected to the other areas A ₁ ,
Since it exists also in A ₂ , the light output of the illumination load 1 in the areas A ₁ and A ₂ can be made uniform by operating the operation device 2.

In this embodiment, the lighting load 1 is used as the load.
However, the technical idea of the present invention can be applied to other loads. For signal transmission between the operating device 2 and the controller 4a, a multiplex transmission signal can be used, or a pulse signal indicating a dimming level by a pulse duty width can be used.

[0019]

According to the present invention, as described above, a plurality of controllers are connected via a transmission line, and the first control unit provided in each controller is based on a reference signal input from the outside through the transmission line. The output of the load is feedback controlled so as to reduce the difference between the set target value and the value detected by the sensor.If a reference signal is given to each controller through the transmission line, the output of the load connected to each controller will be almost equal. can do. Here, some controllers are provided with an operating device corresponding to the operation amount, and a controller to which the operating device is connected is provided with a second control unit. When the change of the load output is requested from the controller, the feedback control by the first control unit is stopped, the output of the load is set according to the manipulated variable, and the reference signal corresponding to the output of the load detected by the sensor is set. Is transmitted to the transmission line, the reference signal corresponding to the output of the load provided in the controller is transmitted to the transmission line by the operation of the operation device, and the outputs of the loads provided in the other controllers are made uniform. There is an advantage that can be.

That is, a plurality of controllers to which a load for giving a reference value of the output is connected can be provided in the system.
If the controller does not operate the operation device, the output of the load is set according to the reference signal transmitted from the other controller. When controlling a large number of loads by one system, only a part of the loads operates. In this case, the output of each load can be made uniform.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment.

FIG. 2 is a block diagram of a controller used in the embodiment.

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

FIG. 4 is a schematic configuration diagram showing a conventional example.

FIG. 5 is an operation explanatory diagram of a conventional example.

FIG. 6 is a schematic configuration diagram showing another conventional example.

FIG. 7 is an operation explanatory diagram of the conventional example of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lighting load 2 Operating device 3 Sensor 4a Controller 4b Controller 10 Control part Ls signal line Xs signal line

Claims (1)

(57) [Scope of request for utility model registration] 1. A controller comprising a plurality of controllers connected via a transmission line and each provided with a load, wherein each of the controllers is based on a sensor for detecting an output of the load and a reference signal inputted from the outside through the transmission line. A first control unit that performs feedback control of the output of the load so as to reduce the difference between the set target value and the detection value of the sensor, and generates an output setting signal corresponding to the operation amount to some controllers. An operation device is provided, and the controller to which the operation device is connected stops the feedback control by the first control unit and controls the output of the load when a change in load output is requested by an output setting signal from the operation device. A load control system comprising: a second control unit that sets a value according to an amount and sends a reference signal according to a load output detected by a sensor to a transmission line.