JPH01157196A - Transmitter-receiver - Google Patents

Abstract

PURPOSE:To cause the reset of a power source supplied device to be automatic by stopping power source supply for a constant time and after that, executing the power source supply again when abnormality is generated in signal transmitting operation between the power source supplied device and a power source supplying device. CONSTITUTION:When a signal is not returned from a remote controller 2a by the trouble of the remote controller 2a or the short circuit of transmitting lines 3a and 3b or a transmitting error is generated, a transistor 17 is turned off by a signal from a microcomputer 8 and the energizing of a coil 18 is stopped. Then, a switch 20a is turned off and the power source supply to the remote controller 2a is stopped. After that, when the constant time passes, the switch 20a is turned on again by a relay circuit 14. Further, when the signal is not returned to the microcomputer 8 or the transmitting error is generated, the switch 20a is turned off again and the microcomputer 8 executes the transmission and reception of the signal successively with remote controllers 2a, 2b and 2c. Then, a power source is supplied only to the remote controller which is properly operated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a transmitting/receiving device that turns on and off the supply of power to a remote control that controls a controlled device from a remote location.

2. Description of the Related Art Conventionally, in order to remotely control a controlled device, a remote controller is connected to the controlled device by a wire, and the controlled device is controlled by operating the remote controller.

Problem to be Solved by the Invention However, when an abnormality occurs such as a signal not being transmitted from the remote control to the controlled device or a signal transmission error occurring, the controlled device automatically deals with this abnormal situation. I couldn't. Therefore, the user has to turn off the power to the controlled device and then turn it on again to reset the microcomputer of the controlled device, which is extremely inconvenient to use.

In view of the above problems, the present invention has been devised so that when a signal is not transmitted from the remote control or a transmission error occurs, a microcomputer automatically determines an abnormal state, controls the power supply to the remote control, and automatically resets the remote control. The purpose is to

Means for Solving the Problems To achieve the above object, the transmitting/receiving device of the present invention comprises: a power supply communication terminal device having a power supply means; 1, the power source! The power-supplied communication terminal device operates by receiving power supply from the mutually-supplied communication terminal device, and the transmission line connects each of the devices and transmits and receives signals and power. If an abnormality occurs in the signal transmission operation with the power-supplied communication terminal device, the power supply to the power-supplied communication terminal device is stopped for a certain period of time, and then power is supplied again. This configuration includes power control means that automatically resets the power supply terminal device.

Effect ゛With this means, if the circuit operation of the power supplied terminal device becomes abnormal due to noise etc. and signal transmission between the power supplied terminal device and the power supplied terminal device cannot be performed normally, the power supplied terminal device is After the power supply is temporarily turned off, it is turned on again after a certain period of time.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

The figure is a block diagram of a central control device according to an embodiment of the present invention.

In the figure, 1 is a controlled device, and 2a, 2b, and gC are remote controllers that control the controlled device 1. 3a, 3
b is a transmission line connecting the controlled device 1 and the remote controller 2a+2'bt2c, and transmits power and signals in a superimposed manner. 4
is a power supply circuit, and commercial power a! is supplied via terminals 5a and 5b. X6
The power source is supplied from the power source and converted into a voltage necessary for electronic circuit operation, and the voltage is supplied to the remote controllers 2a, 2b, and 2c.

A modulation circuit 7 modulates a signal from a microcomputer (hereinafter referred to as "microcomputer") 8 to generate a signal in a primary winding 10 of a transformer 9. The signal generated in the primary winding 10 is transmitted via the secondary winding 11 to the remote controllers 2a, 2b, 2C via transmission lines 3a, 3b.

Conversely, the signals transmitted from the remote controllers 2a, 2b, and 2C are generated in the secondary winding 11 of the transformer 9, and are generated in the primary winding 11 of the transformer 9.
1 to the demodulation circuit 12. The signal that has entered the demodulation circuit 12 is converted into AM detection or digital pulses by the demodulation circuit 12, and is input to the microcomputer 8. 13 is a capacitor which, together with the transformer 9, separates the power supply and the signal.

Reference numeral 14a is a relay circuit consisting of a resistor 15, 16, a transistor 17, a coil 18, and a diode 19. The transistor 17 is turned on and off by a signal from the microcomputer 8, and the switch 20a is turned on and off in response to the signal from the microcomputer 8. In addition, 14b and 14c are also relay circuits, and 20b.

20c is also a switch that turns on and off in correspondence with the relay circuits 14b and 14c, respectively.

Next, the operations of the relay circuits 14a, 14b, 14c and the switches 20a, 20b, 20c will be explained.

First, the microcomputer 8 passes current through the resistor 15 of the relay circuit 14a and turns on the transistor 17, which energizes the coil 18, turns on the switch 20a, and supplies a signal and power to the remote controller 2a. Then, due to a malfunction of the remote control 2a or a short circuit between the transmission lines 3a and 3b, the remote control 2a
If no signal is returned from the controller or a transmission error occurs, the coil 1B is de-energized, the switch 20a is turned off, and the power supply to the remote controller 2a is stopped. After a certain period of time has elapsed, the relay circuit 14a again activates the switch 2.
Even if 0a is turned on, the signal is still output to microcontroller 8.
If the transmission does not return to normal or a transmission error occurs, the switch 20a is turned off again.

Also, relay circuits 14b, 14c and switch 20b.

The operation of 20C is exactly the same. Furthermore, 21a.

21b, 21c, 21d, 21e, and 21f are connection terminals.

As described above, in this embodiment, the microcomputer 8
, 2b, and 2c in order, and are operating correctly.

It supplies power only to 2C.

In the non-embodiment, each remote controller 2a, 2b, 2c is provided with a switch 20a, 20b, 20c, but in another embodiment, all the remote controllers may be turned on and off with one relay circuit and switch.

As described above, in the embodiment of the present invention, the controlled device 1 serves as a power supply communication terminal device, the remote controllers 2a, 2b, and 2C serve as power supply communication terminal devices, and the microcomputer 8 and relay circuits 14a, 14b serve as power control means.
, 14c and switches 20a, 20b, 20c perform their respective functions.

Effects of the Invention As described above, according to the present invention, the following effects can be obtained.

(11) When an abnormality occurs in the remote control signal and the microcomputer malfunctions, the microcomputer can automatically determine the abnormal condition, automatically turn off the power, and reset the microcomputer to return to normal operation.

(2) It is easy to use because the user does not have to turn off the power himself when the remote control malfunctions.

[Brief explanation of the drawing]

The figure is a block diagram of a central control device according to an embodiment of the present invention. 1... Controlled device, 2a, 2b, 2c...
...Remote control, 3a, 3b...Transmission line, 7.
... Modulation circuit, 8 ... Microcomputer, 12 ... Demodulation circuit, 14a, 14b
, 14cm...Relay circuit.

Claims (1)

[Claims] A power supply communication terminal device having a power supply means, a power supply receiving communication terminal device that operates by receiving power supply from the power supply communication terminal device, and each of the devices are connected to exchange signals and power. and a transmission line, the power supply communication terminal device is configured to maintain a constant power supply to the power supply terminal device when an abnormality occurs in the signal transmission operation between the power supply communication terminal device and the power supply receiving communication terminal device. A transmitting/receiving device comprising a power control means that automatically resets the terminal device to which power is supplied by supplying power again after stopping for a certain period of time.