JPS62196927A - Load controller - Google Patents

Abstract

PURPOSE:To attain the control of load through several areas without using any exclusive wiring by superposing a high frequency signal modulated by the control signal on a power line and using this power line as a transmission line for information. CONSTITUTION:Plural plug socket switches 2 and a plug socket adaptor 1 are connected to a power line 6 via an attachment plug 7. Then the connection/ disconnection is carried out between a load 5 connected to the adaptor 1 and the line 6 with push of a switch 4, for example, among those switches 2. The state of the load 5 is inverted with push of each switch 3. In an internal circuit of the switch 2, the input state is inverted to a control circuit 29 when the switch 4 is turned on. Thus the control signal is sent to a transmission/reception circuit 28 from the circuit 29 to invert the state of the load 5. The circuit 28 modulates the high frequency with said control signal and supplied this signal to the line 6 via the plug 7.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a load control device that can drive/stop a load supplied with power from a power line from a plurality of locations.

[Conventional technology]

Figure 5 is published in Matsushita Electric Works' 1985/4 general catalog for electrical equipment materials, for example. In Figure 92, which is a conventional circuit wiring diagram for driving/stopping one load using multiple switches, ooew is a changeover switch that changes the state of the load, and switch o11 is (31a) (31b) (31c).
(31a) (3) with 51c) as a fulcrum point.
1b), switch C (3 is (53a)
) (33b) The switch (to) has the same structure as switch C311, which has three terminals (33c) as a fulcrum and switches to (33a) and (55b).
32 with 4 terminals: 2a, 32b, 32c, 32d)
The connections a)-(52c), (32b)-(32d) are (32a)-(32)), (52b)-(32
c) K switch.

(b) is the power supply, (6) is the power line, (6a) (6b bar 6c)
)(6d)(6e)(6f)(6g) is the wiring between each terminal, and (51 is the load supplied with power from the power line).

Next, the operation will be explained. As shown in Figure 5, power supply (b)
Load (5) - switch (to) - switch (2) in series from
) - When connected to the switch (υ - power supply (to)), the power line (6f bar 6e bar 6d
)(6c) is ', (3
1a)-(33a), (31b)-(33b),
(31a)-(33b) or (31b)-(33a)
A path is made between the switch 6υ and the switch (to) using any combination of the above. By the way, this power line (6f bar 6s (6d) (6c)
The connection status of is that each time switches 6υ (to) and (to) are switched, they are connected and separated, so one load (5) can be connected from different locations where switch 0υ @ (to) exists. , can be controlled to drive/stop, respectively. In this figure, there are only three switches, but to increase the number of control points, connect a switch similar to switch (to) in series between switch C31) and switch (to). The number of control points can be increased by the number of points.

[Problem that the invention seeks to solve]

The conventional device for driving/stopping one load using multiple switches is configured as described above.

Dedicated wiring is required for load control, and there is a problem in that the wiring work is complicated in existing houses and buildings.

This invention was made to solve the above-mentioned problems, and uses power line carrier communication in which a high frequency signal modulated by a control signal is superimposed on the t-force line, and the power i is used as an information transmission path. An object of the present invention is to obtain a load control device that can control loads from multiple locations without using dedicated wiring.

[Means for solving problems]

A load control device according to the present invention that controls one load from multiple locations includes a plurality of outlet switches that modulate W force lines with control signals and transmit high-frequency signals, and demodulates the high-frequency signals from these outlet switches. , one outlet adapter is provided to connect/separate the load and the power line.

[Effect]

In this invention, power line carrier communication is used for signal transmission between the outlet switch and the outlet adapter, so by superimposing a high frequency signal modulated with a control signal on the power line, control can be performed using only existing wiring without using dedicated wiring. Since the signal can be transmitted to one target location, the target load can be controlled from multiple locations having transmitting terminals.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

Figure 1 is a system diagram of this invention, and in Figure 91 (6
) is a power line that supplies power and superimposes a high-frequency signal, (5I is a load supplied with power from the power line, (71
is a plug, (1) is a plug (71 and load +51
0N1 of load (5) by relaying between
An outlet adapter that performs 0FF, (2) is an outlet switch that performs 0N10FF of the load (5:) connected to outlet adapter +11 using power line transport.
, +41 is a switch that is included in the outlet switch (2) and generates a high frequency signal to control the load +51.

Figure 2 is an internal circuit diagram of the outlet adapter (11). In Figure 0, 71 is the plug, (8) is the power supply circuit that supplies power to each part, and (9) is the transmission/reception circuit for the high-frequency signal superimposed on the power line. , α1 transmits and receives baseband data to and from the transmitter/receiver circuit (9), and checks whether the load (5) is connected to the power line (6) (fC#).

Alternatively, a control circuit that controls a keep relay that connects/disconnects the power line (6) and the load (51), α3 ti4
12)1C! 4) (C) is resistance, α3α9 is PNP
) transistor, tte is the reset coil of the keep relay, αa is the set coil of the keep relay, α9Gυ is the diode, ■ is the contact of the keep relay with terminals (20a) (20b), c! 3 is a photocoupler containing a light emitting diode (2Q) and a phototransistor (23b), and 2 is a capacitor.

Figure 3 is the internal circuit diagram of the outlet switch (2).
In figure 0, (7) is the plug, @ is the power supply circuit that supplies power to each part, @ is the transmission/reception circuit for the high frequency signal to be superimposed on the power line, (to) is the transmission/reception circuit (to) and the transmission/reception of baseband data. or switch (4) to 0N10.
A control circuit for checking the FF state, ■ is a resistor.

Figure 4 shows the control circuit αG in the outlet adapter (11).
3 is a flowchart showing the control processing operation of FIG.

Next, the operation will be explained. As shown in the system diagram shown in Fig. 1, in this system, a plurality of outlet switches 12 (and one outlet adapter (1)
is connected with the plug (7), and the load (51) connected to the power line (61) connected to the outlet adapter (1) is connected/disconnected to any one of the plurality of outlet switches (2).
It is executed by pressing the switch (4) on the stand.

The state of the load 15+ is reversed by pressing the respective switch (3).

In the internal circuit of the outlet switch (2) shown in Fig. 3, when the switch (41) is turned on, the input state to the control circuit (2) is reversed, and the input state from the control circuit (2) to the transmitting/receiving circuit (2) is reversed.
A control signal that inverts the state of the load (5) is transmitted to the load (5).The transmitter/receiver circuit modulates a high frequency with the control signal and injects this signal into the power line (6) via the plug (7).

In the internal circuit of the outlet adapter shown in Figure 2, the high-frequency signal from the outlet switch (2) described above is input to the transmitter/receiver circuit (9) via the plug (7), where the control signal is demodulated. and is transmitted to the control circuit αG. Therefore, when the demodulation control signal is received, the control circuit αG:
In order to immediately reverse the state of the load (5), drive the set coil αδ or reset coil (161).Now, when driving the set coil αδ, an L level pulse is generated on the port on the resistor I side, which is normally at H level. and transistor ri'JfoNVcf.

On the other hand, when the reset coil t1e is driven, the normal H
A low level pulse is generated on the port on the resistor α2 side, which is the level, and transistor 0 is turned on.

By the way, determine whether to drive the set coil α8f or to drive the reset coil tte by checking the contact point (20) of the relay.
b) Depends on whether the side KW force is supplied or not.

If the contact ■ is OFF, no current will flow through the light emitting diode (25a) of the photocoupler (c).
The phototransistor (23b) is OFF rap, due to the action of the pull-up resistor (to), and the input to the control circuit is H.
level. On the other hand, if contact ■ is ON.

A current flows through the light emitting diode (2k) of the photocoupler (to) every half cycle of the power supply frequency via diode 01) and resistor clD, and the phototransistor (25b)
) switches between half cycles and. This switching voltage and voltage are smoothed by a resistor (c) and a capacitor (1), thereby lowering the input voltage to the control circuit α1. Based on this potential difference, the control circuit α1 detects whether the relay contact ■ is ON or OFF, and if it is ON, it drives the reset coil αe, and if it is OFF, it drives the set coil Q8. In addition, after the control circuit 0I generates a drive pulse to the relay, it checks the state of the relay contact ■ again, and if this is the same state as before the pulse was generated,
It also has the function of sending the same pulse again and repeating this until the state is reversed. This operation is as shown in chart 70 in FIG.

〔Effect of the invention〕

As described above, according to the present invention, since power line carrier communication is used for load control, there is no need for dedicated wiring or its incidental construction, and the control switch can be installed anywhere where power lines are wired. It is possible to control one load from multiple locations.

[Brief explanation of drawings]

FIG. 1 is a system diagram of a load control device according to an embodiment of the present invention, FIG. 2 is an internal circuit diagram of the outlet adapter in FIG. 1, and FIG. 3 is an internal circuit diagram of the outlet switch in FIG. 1. 1wc4 is a processing flowchart of a control circuit of an outlet adapter, and FIG. 5 is a wiring diagram of a conventional load control device. In the figure, (1) is the outlet adapter, (2) is the outlet switch, (41 is the load control switch, (51 is the load), (6) is the power line, (7) is the plug, and (8) is the outlet adapter. Power supply circuit, (9) is the same transmitting/receiving circuit, al
is the same control circuit, fi3 fi4101) C24)
2!9 C3G is a resistor, f131+15 is a PNP transistor, de is a reset coil, (lηα1lc311
is a diode. A8 is set coil, C! I indicates the relay contact, ■ indicates the photocoupler, (to) indicates the capacitor, (5) indicates the power supply circuit of the outlet switch, @ indicates the transmitting/receiving circuit, Ca1 indicates the control circuit, 0υQ33 indicates the switch, and (b) indicates the power source. . Note that the reference numerals in the middle of each figure indicate the same or equivalent parts. Figure 1 Figure 2 12) 42) 2425: JAM. 1315; PNP) Lunge 26: Funnacer No. 3rIJ 30-2'@Figure 4

Claims (3)

[Claims] (1) A plurality of outlet switches that are connected to a power line and have a switch in the main body, generate a control signal every time the switch is pressed, and inject a high frequency signal modulated by the control signal into the power line and transmit it; Also connected to the power line,
A load control device comprising: an outlet adapter that receives the high frequency signal, demodulates the control signal, and controls a load supplied with power from a power line to be stopped when being driven and to be inverted when stopped. Device. (2) The load control device according to claim 1, wherein the outlet adapter includes means for checking the operating state of the load. (3) The load control device according to claim 2, wherein a photocoupler operated by the voltage supplied to the load is used as the operating state confirmation means for the load.