JPS6219059Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a power line carrier remote control system that remotely controls an indoor load by superimposing a high frequency carrier signal on an indoor power line.

Conventionally, as shown in FIG. 1, a transmitter/receiver unit 4 has a built-in transmitter 2 that superimposes and transmits a carrier signal over a power line 1, and a receiver 3 that receives and detects the carrier signal transmitted via the power line 1. A power line carrier remote control system has been developed in which a plurality of power lines are connected to a power line, a load operation switch 5 is provided in a transmitter/receiver unit 4a for remote control, and a load 6 connected to a transmitter/receiver unit 4b for load control is controlled on/off. has been done. In such a system, the transmitter/receiver unit 4b that turns on and off the load sends its operation confirmation signal as a return signal to the remote control transmitter/receiver unit 4a connected to the load operation switch 5, and displays the status of the load 6. This system employs a so-called answer back system for operating the device 7. By the way, when applying such an answer-back type power line transport remote control system to a priority control system, that is, a control system in which the load operates only when switch B is turned on after switch A is turned on, the display device 7 is There was a drawback that the operation did not necessarily match the state of the load 6. That is, as shown in FIG. 3, the on/off contacts ₈₁ and ₈₂ are connected in series with the load 6, and for example, after operator A closes the on/off contact ₈₁ , operator B closes the on/off contact ₈₂ . If the wiring is such that the load 6 is turned on only when the relay is closed, the load 6 will not be turned on if the relay contact ₈₁ is open when the operator B closes the relay contact ₈₂ . However, in spite of this, a return signal indicating load conduction is sent back from the transmitting/receiving unit _4b2 via the power line 1, so the display device ₇₂ of the transmitting/receiving unit _4a2 enters the display state, resulting in an incorrect display. It was hot.

The present invention has been made to eliminate these drawbacks of the conventional example, and is applicable to a so-called answer-back type remote control system that sends back a return signal indicating the load status. To provide a power line conveyance remote control system which prevents erroneous display on a display device of a remote control transmitting/receiving unit and makes the actual on/off state of a load completely correspond to the display state of the display device when The purpose is to

The configuration of the present invention will be explained below with reference to an illustrated embodiment. As shown in FIGS. 1 and 2, a power line 1
A plurality of transmitter/receiver units 4 each having a built-in transmitter 2 that superimposes and transmits a carrier signal on the power line 1 and a receiver 3 that receives and detects the carrier signal sent via the power line 1 are connected to the power line 1 and remotely controlled. A load operation switch 5 is connected to the transmitter 2 of the transmitter/receiver unit 4a for load control, and a display device 7 for displaying the status of the load 6 is connected to the receiver 3.
In a power line carrier remote control system, in which an on/off contact 8 for load control is connected to the receiving section 3 of b, and a return signal generating circuit section 9 for generating a return signal indicating the status of the load 6 is connected to the transmitting section 2. The on/off contact ₈₁ of the first transmitting/receiving unit _4b1 for load control is interposed between the second transmitting/receiving unit _4b2 and the power line 1, and the on/off contact ₈₂ of the second transmitting/receiving unit _4b2 controls the load. 6. The high-frequency carrier signal superimposed on the power line 1 is transmitted in synchronization with the zero-crossing signal of the AC power supply voltage, and the on/off contact 8 and its on/off control are controlled depending on the position from the zero-crossing point and the superimposition time of the carrier signal. This is what we are trying to differentiate between. FIG. 1 is a block diagram showing the basic configuration of the power line carrier remote control system of the present invention. As shown in the figure, a block filter 11 is connected between the power line 1 to which a large number of transmitting/receiving units 4 are connected and the AC power source 10. is inserted to prevent high-frequency carrier signals from leaking into neighboring houses and causing noise disturbances or interference with other systems. Therefore, in the present invention, in the power line carrier remote control system as shown in FIG. ₁ , as shown in _FIG . _4b2 and the power line 1. Therefore, unless the on/off contact ₈₁ is closed in the first transmitter/receiver unit _4a1 for remote control, even if the relay contact ₈₂ is attempted to be closed in the second transmitter/receiver unit _4a2 for remote control, the transmitter/receiver will not work. Since the unit _4b2 is not connected to the power line 1, the relay contact ₈₂ does not operate, and since no return signal is sent back, the display device ₇₂ of the transmitting/receiving unit _4a2 does not light up. Therefore, if the display device ₇₁ connected to the first transmitting/receiving unit 4a ₁ for remote control lights up, the second transmitting/receiving unit 4a ₂
If the display device ₇₂ connected to the second transmitting/receiving unit _4a2 lights up, it can indicate that the load 6 is actually turned on. It is something that can be done.

The present invention is configured as described above, and when the load operation switch of the remote control transmitter/receiver unit closes the relay contact of the load control transmitter/receiver unit, a return signal for operation confirmation is sent back to the remote control transmitter/receiver. In a so-called answer-back type power line transport remote control system in which the display device of the transmitter/receiver unit is operated, the on/off contact of the first transmitter/receiver unit for load control is interposed between the second transmitter/receiver unit and the power line. However, since the load is controlled by the on/off contact of the second transmitting/receiving unit, operator A, for example, the bus, operates the first transmitting/receiving unit for remote control and controls the second transmitting/receiving unit for load control. When the transmitting/receiving unit for load control is connected to the power line, the display unit will display a message to that effect, and in this state, operator B, for example, a child, will operate the second transmitting/receiving unit for remote control to connect the second transmitting/receiving unit for load control. Only when the relay contact of the unit is closed, a load connected to the relay contact, for example a television, is switched on, and only then is the display of the second transmitter/receiver unit for remote control activated. Therefore, there is no problem such as the display device operating even though the load is not on as in the conventional example shown in Fig. 3, and the display state of the display device and the operating state of the load are always consistent. This has the advantage that it corresponds clearly.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the basic configuration of an answer-back type power line transport remote control system used in the present invention, and FIG. 2 is a circuit diagram of an embodiment of the present invention.
Figure 3 is a circuit diagram of a conventional example, where 1 is a power line and 2 is a circuit diagram of a conventional example.
3 is a transmitting section, 3 is a receiving section, 4a and 4b are transmitting/receiving units, 5 is a load operation switch, 6 is a load, 7 is a display device, 8 is an on/off contact, and 9 is a return signal generating circuit section.

Claims (1)

[Scope of utility model registration request] A transmitting/receiving unit for remote control is created by connecting multiple transmitting/receiving units to the power line, each of which has a built-in transmitter that superimposes a carrier signal on the power line and transmits it, and a receiver that receives and detects the carrier signal sent via the power line. A load operation switch is connected to the transmitter of the transmitter, and a display device for displaying the load status is connected to the receiver, and an on/off contact for load control is connected to the receiver of the transmitter/receiver unit for load control. In a power line carrier remote control system in which a return signal generating circuit unit for generating a return signal indicating the status of A power line transport remote control system in which a load is controlled by an on/off contact of a second transmitting/receiving unit.