JP2661215B2 - Telecontrol device and telephone terminal system - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telecontrol device and a telephone terminal system capable of setting or controlling the operation of an electric device from a remote place via a telephone line.

2. Description of the Related Art Conventionally, a telephone terminal device that controls an electric device from a remote place via a telephone line has been used. Some of these control a video tape recorder (hereinafter referred to as a VTR) with an infrared light signal.

This device is connected to a telephone line, automatically closes the telephone line when a bell signal is detected, and sets a recording channel, a recording start time, and a recording end time by a remote signal transmitted by a caller. When the recording start time comes, the channel selected by the remote operation and the recording start signal are transmitted to the VTR by the same infrared light signal as the infrared light signal emitted by the remote controller attached to the VTR, and the VTR To start recording. Next, when the recording end time comes, the telephone terminal device sends a stop signal to the VTR again to stop recording by the VTR. Such a video telephone controller supplies power to each circuit from a battery.

Problems to be Solved by the Invention By the way, VTRs generally use commercial power as their power source, and when a power failure occurs during recording, the information, that is, the recording channel information and the recording start time information are erased. Since the recording is not started again after the restoration of the power failure, there is a problem that if a power failure occurs during the recording, the recording by the VTR is interrupted after the time of the power failure.

Means for Solving the Problems In order to solve the above problems, the telecontrol device and the telephone terminal system of the present invention provide a power supply unit for supplying power from a commercial power supply to each unit, and a power failure and a power failure recovery of the commercial power supply. A power failure detection means for detecting, a control signal generation means for outputting a signal stored in the storage means to the controlled part, and a control signal generation means for determining when a time of the timer means matches an operation start time stored in the storage means. Generating a control signal for starting operation from the control signal generating means to the controlled unit,
When the time of the timer means coincides with the operation end time stored in the storage means, the control signal generating means generates an operation end control signal to the controlled part, and the power failure detection means performs a power failure recovery. Output a signal, and when the time indicated by the timer means is between the operation start time and the operation end time stored in the storage means, the control signal generation means starts the operation with respect to the controlled unit. Control means for performing control to generate a control signal.

Operation With this configuration, the power of the controlled device and the telecontrol device together with the controlled device are interrupted and restored, and the time when the power is restored is determined by the time when the controlled device must be started to operate by the telecontrol device and continue to operate. When this is the case, the telecontrol device starts operating the controlled device.

Embodiment An embodiment of the present invention will be described below.

In this embodiment, VT is used as an example of a telephone terminal device.
A description will be given using a video controller capable of controlling R.

FIG. 1 is a block diagram of a video controller according to an embodiment of the present invention, FIG. 2 is a circuit diagram showing details of a power supply circuit and a power failure detection circuit, FIG. 3 is a timing chart of each voltage at the time of power failure, and FIG. FIG. 4 is a timing chart of each voltage at the time of restoration from power failure, and FIG. 5 is a flowchart showing an operation at the time of restoration of power failure.

In FIG. 1, 1 is a telephone line, 2 is a telephone terminal device, 3
Is a telephone line interface, and 4 is control means constituted by a microcomputer. 5 is a memory provided in the control means 4, 6 is an infrared signal drive circuit, 7 is an infrared light emitting diode, 8 is a timer provided in the control means 4, 9 is a power supply circuit, 10 is a power failure detection circuit, and 11 is a telephone. AC adapter that supplies power to terminal device 2, 12 is VTR, 13 is V
Remote control attached to TR12, 14 is control means 4 and memory 5
And a backup power supply for backup operation of the timer 8.

In FIG. 2, 21 is a transistor, 22 is a Zener diode, 23 is a resistor, 24 is a capacitor, 25 is a backup capacitor of the control means 4, 26 is a diode, 27 and 28 are voltage dividing resistors, and 29 is a Schmitt inverter. is there.

The operation of the telephone terminal configured as described above will be described below.

First, when an incoming signal is input from the telephone line 1 to the telephone terminal device 2, the telephone line interface 3 detects it and automatically closes the telephone line. In this state the caller is VTR
When a signal for recording reservation is transmitted, the signal is converted into a 4-bit signal by the telephone line interface 3 and transmitted to the control means 4.

The recording start time information, the recording end time information, and the recording channel information are stored in the memory 5 of the control means 4 by the 4-bit signal. The control means 4 performs a time counting operation by the timer 8, compares the recording start time stored in the memory 5 with the current time by the timer 8 as needed, and stores the recording start time stored in the memory 5. If it matches, the recording start signal of the VTR 12 is output to the infrared signal drive circuit 6, and the infrared light emitting diode 7 emits the infrared light of the recording start toward the VTR 12 (the infrared light of the recording start is the VTR 1
The remote control 13 attached to 2 is set in advance to be the same as the infrared light that instructs the VTR 12 to start recording), and the VTR starts recording. After that, the control means 4 compares the recording end time stored in the memory 5 with the current time of the timer 8 as needed, and if the current time matches the recording end time stored in the memory 5, The control means outputs a signal to the infrared signal drive circuit 6 to emit the same infrared light as the stop signal of the remote controller of the VTR.

 Next, the power supply circuit 9 and the power failure detection circuit 10 will be described.

These details are shown in FIG. The power supply circuit 9 is stabilized by the transistor 21, the zener diode 22, the resistor 23, and the capacitor 24 because the DC input from the AC adapter 11 includes a pulsating component and has a voltage fluctuation due to the combined use of other air conditioners and the like. Let me. Also backup capacitor
25 is to prevent the operation of the control means 4 and the timer 8 from being stopped even when the supply of power from the AC adapter 11 is stopped, and to prevent the information stored in the memory 5 from being lost due to a power failure. Provided, diode
26 is for preventing the backflow of this electric charge.
And VB.

 Next, the operation when the commercial power supply is cut off will be described.

When the commercial power supply is interrupted, the current supply from the emitter of the transistor 21 stops, and the voltage of the VA system rapidly decreases. Therefore, the capacitor 24 and the voltage dividing resistor 2
The potential VC of the voltage dividing circuit constituted by 7, 28 also drops accordingly. The fluctuation of the potential VC is converted from a low level to a high level by the Schmitt inverter 29 operated by the backup capacitor 25, and transmitted to the port A of the control means 4. The control means 4 detects the voltage change of the port A, and the control means 4 recognizes that the commercial power supply has been stopped.

 FIG. 3 shows a timing chart of the above operation.

The potential of VB is controlled by the control means 4 and the Schmitt inverter 29.
Since the power consumption is small, the power is held by the backup capacitor 25 for a certain period of time. Schmitt inverter 29
The potential VC, which is the input voltage of, decreases more rapidly than at the time of the power failure.
The threshold voltage VTHL of the IC 29 is constant because the drive voltage VB is constant. When VC falls below VTHL, the output of the Schmitt inverter 29 changes from low level to high level. Thus, the control means 4 detects that a power failure has occurred.

Next, FIG. 4 shows the operation timing of each unit when the power failure is restored. VA rises from around 0 V at the same time as recovery, and the potential VC of the input of the Schmitt inverter 29 rises similarly.
When the potential VC of the input to the Schmitt inverter 29 becomes larger than the threshold voltage of the Schmitt inverter 29, the output of the Schmitt inverter 29 changes from the low level to the high level and is input to the port A of the control means 4, and No. 4 detects that the power failure has been restored. Then, at the time of restoration from power failure, the control means 4 performs processing as shown in FIG. Here, the recovered time (T.NOW) is the recording start time (T.Rec.Start) and the recording end time (T.Rec.En
If it is during d), the infrared signal is driven via the infrared signal drive circuit 6 to drive the infrared light emitting diode 7 to control the VTR 12 to emit infrared light for starting recording.

 The operation of this embodiment is executed according to the above procedure.

As described above, the present invention provides a power supply unit that supplies power from a commercial power supply to each unit of the apparatus, a power failure detection unit that detects a power failure and restoration of a power failure of the commercial power source, and a signal stored in the storage unit. Control signal generating means for outputting to the controlled part, control of the operation start from the control signal generating means to the controlled part when the time of the timer means coincides with the operation start time stored in the storage means. A signal is generated, and when the time of the timer means matches the operation end time stored in the storage means, the control signal generation means generates an operation end control signal to the controlled unit, and further comprises the power failure The control signal is generated when the detection means outputs a power failure recovery signal and the time indicated by the timer means is between the operation start time and the operation end time stored in the storage means. Control means for controlling the means to generate an operation start control signal from the means to the controlled part, the telecontrol device and the telephone terminal system
If the power is restored and the power is restored together with the controlled device, and the time at which the power is restored is the time when the controlled device has been started to operate by the telecontrol device and must continue to operate, Since the telecontrol device automatically starts operation, it can minimize the damage caused by a power failure, that is, the time during which recording cannot be performed when using a VTR as a control device. There is a great thing.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a telecontrol device and a telephone terminal system according to an embodiment of the present invention. FIG. 2 is a circuit diagram showing a power supply circuit and a power failure detection circuit used in the embodiment.
FIG. 3 is a timing chart showing a change in each voltage at the time of power failure in the embodiment, FIG. 4 is a timing chart showing a change in each voltage at the time of restoration from power failure in the embodiment, and FIG. 5 is a power failure in the embodiment. It is a flowchart which shows the flow of operation | movement at the time of restoration. DESCRIPTION OF SYMBOLS 1 ... Telephone line, 2 ... Telephone terminal device, 3 ... Telephone line interface, 4 ... Control means, 5 ... Memory, 6 ... Infrared signal drive circuit, 7 ... Infrared light emitting diode, 8 ... Timer, 9 Power supply circuit, 10 Power failure detection circuit, 11 AC adapter, 12 VTR, 13 Remote control, 14 Backup power supply, 21 Transistor, 22 Zener diode, 23 … Resistance, 24 …… Capacitor, 25 …… Backup capacitor, 26 …… Diode, 27,28… Division resistor, 29 …… Schmidt inverter

Claims (3)

(57) [Claims] 1. A remote circuit connected to a telephone line, automatically closing the telephone line in response to an incoming signal, and detecting a remote signal input from the telephone line and representing an operation start time and an operation end time. Telephone line interface means for outputting a signal corresponding to a remote signal, storage means for storing a signal output from the telephone line interface means, timer means for performing a timekeeping operation, information holding in the storage means, and A backup power supply for backing up the operation of the timer means, a power supply means for supplying power from the commercial power supply to each unit of the apparatus, a power failure detection means for detecting a power failure and restoration of the power failure of the commercial power supply, and a signal stored in the storage means Control signal generating means for outputting to the controlled unit,
When the time of the timer means coincides with the operation start time stored in the storage means, the control signal generation means generates an operation start control signal to the controlled unit, and the time of the timer means and the storage When the operation end time stored in the means matches, the control signal generation means generates an operation end control signal to the controlled unit, the power failure detection means outputs a power failure recovery signal, and the timer When the time indicated by the means is between the operation start time and the operation end time stored in the storage means, control is performed such that the control signal generation means generates an operation start control signal to the controlled unit. A telecontrol device comprising: 2. A telephone terminal system comprising: a telecontrol unit; and a controlled unit that receives a control signal from the telecontrol unit and performs an operation corresponding to the control signal. , Automatically connects the telephone line in response to the incoming signal connected to the telephone line, detects the remote signal indicating the operation start time and operation end time input from the telephone line, and responds to the detected remote signal Telephone line interface means for outputting the output signal, storage means for storing the signal output from the telephone line interface means, timer means for performing a timekeeping operation, holding of information in the storage means and operation of the timer means A backup power supply for backing up the power, a power supply means for supplying power from the commercial power supply to each unit of the apparatus, Power failure detection means for detecting power recovery, control signal generation means for outputting a signal stored in the storage means to the controlled unit, and a time of the timer means and an operation start time stored in the storage means The control signal generating means generates an operation start control signal for the controlled part when the values coincide with each other, and the control signal generating means when the time of the timer means matches the operation end time stored in the storage means. Generating a control signal for terminating the operation to the controlled unit, further outputting the power failure recovery signal from the power failure detection means, and the operation start time stored in the storage means the time indicated by the timer means And control means for controlling the control signal generating means to generate a control signal for starting operation to the controlled part when the time is between the operation end time and the operation end time. Terminal system. 3. The telephone terminal system according to claim 2, wherein said controlled unit is a video tape recorder.