JPH084286B2 - Tele control device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a telecontrol device for controlling an electric device in a home from a telephone outside the home by using a general telephone line.

[Conventional technology]

In recent years, a telecontrol device has been developed that controls an electric device such as an air conditioner and a lighting device in a home from a telephone outside the home using a telephone line. This is because when you make a call from a telephone outside the home, the telecontrol device detects a call signal for a certain time (or a certain number of times),
When the telephone line outside the home automatically sends a control signal to the telecontrol device, the telecontrol device receives this control signal and the control signal is automatically closed. According to the above, electric appliances and the like in the home are controlled. A so-called push tone telephone DTMF (Dual tone Malti-Frequency) signal is often used as the control signal, and for example, the air conditioner is turned on for "5 #".

Such a telecontrol device is disclosed in
It is described in detail in JP-A-61-43866.

In the following explanation, the state in which the telephone line is DC-connected is called the off-hook state, the state in which the telephone line is open is on-hook, and the DC state of the telephone line is collectively called the hook state. To On a regular phone,
The state where the handset is raised is the off-hook state, and the state where the handset is placed is the on-hook state.

[Problems to be solved by the invention]

Although the above-mentioned conventional telecontrol device detects a call signal for a certain period of time and then goes into an off-hook state to receive a control signal, a telephone terminal (non-telephone) such as an answering machine is provided on the same telephone line. When a call signal arrives, an answering machine on the same line responds to this call signal and switches the telephone line when a call signal arrives. There is also a problem that the telecontrol device may not be able to perform the telecontrol operation because it may be in an off-hook state.

An object of the present invention is to solve the above-mentioned problems of the prior art and to provide a telecontrol device capable of performing a normal operation even when another telephone terminal is connected to the same line. To provide.

[Means for solving problems]

In order to achieve the above object, the present invention comprises, in addition to the conventional telecontrol device, means for detecting the hook state of the connected telephone line.

[Action]

Whether the means sets another telephone terminal connected to the same telephone line into an on-hook state after the response of the other telephone terminal ends after the other telephone terminal is turned off-hook in response to the call signal. It is detected that the telecontrol operation is started based on the detection result.

〔Example〕

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

FIG. 1 is a block diagram showing an embodiment of a telecontrol device according to the present invention, in which 101 is a general telephone line, 1
02 is a telecontrol device, 103 is a switch circuit, 104 is a termination circuit, 105 is a control signal receiving circuit, 106 is a response signal transmitting circuit, 107 is an incoming detection circuit, 108 is a hook state detection circuit,
109 is a main control circuit by a computing device (CPU), 110 is a device interface circuit, 111 is a mode setting circuit, 112 is an incoming time setting circuit, 113 is a controlled device (for example, air conditioner, lighting, VTR, etc.), 114 is It is an answering machine as another telephone terminal connected to the telephone line 101.

FIG. 2 is an operation explanatory view of the telecontrol device 102 in FIG. 1, and shows a signal state of the telephone line 101 in FIG.

Here, the telephone line 101 has two signal lines L ₁ and L ₂
And the voltage between these signal lines L ₁ and L ₂ is applied to the telephone line 101.
Let's call it the voltage of. In FIG. 2, the signal line L ₂ is assumed to be grounded.

In FIG. 1, a main control circuit 109 controls and manages the entire telecontrol device 102. The switch circuit 103 is for connecting the telephone line 101 to the telecontrol device, and when these are connected, the telephone circuit 101 is DC-connected by the termination circuit 104. Receiver circuit 105
Receives a control signal for controlling the controlled device 113 sent through the telephone line 101. When the DTMF signal is used as the control signal, the receiving circuit 105 is a DTMF signal receiving circuit. When the receiving circuit 105 receives the control signal, the transmitting circuit transmits the response signal. A voice or a simple tone signal is used as the response signal. The incoming call detection circuit 107 detects a call signal. The hook state detection circuit 108 is for detecting whether or not another telephone terminal connected to the same telephone line 101 is in the hook state.
The mode setting circuit 111 switches between a so-called home mode and an out-of-home mode (a mode in which a telecontrol operation is performed and is also called a telecon mode or an automatic reception mode). The incoming time setting circuit 112 sets the detection time (or the number of times of calling) of the calling signal in the incoming detection circuit 107. When the call signal is detected for the set detection time (or the number of calls), the telephone line 101 goes off-hook and the telecontrol operation starts.

 Next, the operation of this embodiment will be described with reference to FIG.

First, the mode setting circuit 111 of the telecontrol device 102.
To go out mode. In this state, when an incoming call is received from an unspecified telephone, the polarity of the voltage is inverted in the telephone line 101 as shown in FIG.
The 16 Hz ringing signal then appears. Therefore, at time t ₁ after a certain period of time, the answering machine 114 automatically receives and automatically closes the telephone line 101 into an off-hook state. When the telephone line 101 goes off-hook, the voltage polarity of the telephone line 101 is reversed again. At this time, however, since the telephone line 101 is DC-connected by the answering machine 114, the voltage of the telephone line 101 is on-hook. The voltage V _s is lower than the voltage V _{0 in} the (normal state) (determined as +42 to +52 V by the technical standard). The answering machine 114 operates in this state. After that, when the operation of the answering machine 114 is finished and an on-hook response is made (the line is opened) (at t _{2 in} FIG. ₂ ), the telephone line 101 is opened and its voltage becomes V ₀ again.

The hook state detection circuit 108 thus makes the answering machine 114
Is activated and the telephone line 101 goes off-hook,
When this operation is completed and the telephone line 101 is put into the on-hook state, the switch circuit 103 is closed (t in FIG. 2).
₃ ), the telephone line 101 is connected to the telecontrol device 102. As a result, the telephone line 101 is DC-connected by the terminating circuit 104, and the off-hook state is set again to start the telecontrol operation. That is, when the control signal receiving circuit 105 receives the predetermined control signal in the telecontrol device 102 and the control signal receiving circuit 105 receives the control signal, the main control device 109 decodes the control signal and receives the control signal via the device interface circuit 110. The control device 113 is controlled.

As described above, in this embodiment, in response to the call signal that notifies the incoming call, first, the answering machine 114 operates, and it is detected that the operation is completed and the telecontrol device 10 is detected.
2 starts to work. When the telecontrol operation is completed (t ₄ time of the second view), the switch circuit
103 opens to release the telephone line 101 and returns to the normal state.

In addition, the time from time t _{2 to} time t ₃ in FIG. ₂ is usually about 100 msec or less. With this setting, the exchange cannot recognize that it is on-hook, and the telephone line is connected to the other party. It has been done.

Next, when the mode setting circuit 111 is set to the home mode, the switch circuit 103 is always open and the telecontrol device 102 does not perform the telecontrol operation.

Further, when the answering machine 114 is not connected to the same telephone line 101 and is set in the outing mode, or even if the answering machine is connected and the answering machine is not in the outing mode, the incoming call detection circuit 107 It is the same as in the prior art that the call signal is detected by the incoming time setting circuit 112 for a certain period of time and then closed by the switch circuit 103 to start the telecontrol operation. However, as shown in FIG. 1, when the answering machine 114 is connected to the same telephone line 101, the set time of the incoming call time setting circuit 112 is the answering machine 114.
It is necessary to set a time longer than the incoming call detection time when the automatic reception is performed, or to stop the operation of the incoming call detection circuit 107.

Further, in FIG. 1, the telecontrol operation is performed only when the mode setting circuit 111 is set to the out-of-service mode, but the mode set by setting the incoming call detection time to a somewhat long time. However, in this case, the mode setting circuit 111 and the like may be omitted.

By the way, when the answering machine 114 is connected to the same telephone line 101, the hook state detecting circuit 107 simply detects the off-hook and the on-hook of the answering machine 114 to operate the telecontrol device 102.
If a call is made (sent) from 14, there is a possibility that the telecontrol device 102 may operate even after the talk is finished and the receiver is placed. For this reason, there is a method in which the telecontrol device 102 is provided with a timeout process in which the operation is terminated when a predetermined control signal is not received for a certain period of time. Should not work. Therefore, for that purpose, only when the incoming call detection circuit 107 detects the incoming call by the call signal shown in FIG. 2 or the polarity reversal of the voltage of the telephone line 101, and the off-hook state and the on-hook state are detected thereafter. The telecontrol device 102 may be operated.

FIG. 3 is a circuit diagram showing a specific example of the hook state detection circuit 108 in FIG. 1, in which 301 to 304 are diodes,
305 to 308 are resistors, 309 are capacitors, 310 is a voltage comparator,
311 is a reference voltage source.

In this specific example, when the telephone line 101 is DC-closed (off-hook), the voltage of the telephone line 101 drops to V _S , as shown in FIG. 2, so that this can be detected. .

In FIG. 3, the signal voltage of the telephone line 101 is rectified by a rectifier circuit including diodes 301 to 304 and supplied to a low pass filter including a resistor 305 and a capacitor 309.
This low-pass filter is for blocking the call signal of 16 Hz shown in FIG. The output voltage of this low-pass filter is divided by resistors 306 and 307, and voltage comparator 310
Is compared with the reference voltage Eφ from the reference voltage source 311. Here, the reference voltage Eφ is a resistance of 30 when the telephone line 101 is in a normal state (the signal voltage of the telephone line 101 is V _{0 in} FIG. 2).
It is lower than the divided voltage by 6,307 and is set higher than the divided voltage by the resistors 306, 307 when the telephone line 101 is in the off-hook state (the signal voltage of the telephone line 101 is V _{S in} FIG. 2). Therefore, the resistor 308 is connected to the output terminal of the voltage comparator 310.
Since the power supply voltage Vcc is applied via the
When 01 is in a normal state, the output level of the voltage comparator 310 is “H” (high level), but when the telephone line 101 is off-hook, the output level of the voltage comparator 310 is “L” (low level). The hook state of the telephone line 101 can be detected.

Note that the signal voltages V ₀ and V _S are the telephone line 101 and the termination circuit 104.
The voltage V ₀ of the telephone line 101 in the normal state is first detected and the hook state of the telephone line 101 is detected by the change from the voltage V _0. is there.

FIG. 4 is a circuit diagram showing another specific example of the hook state detection circuit 108 in FIG. 1, in which 401 and 402 are photocouplers, 403 to 406 are resistors, and 407 and 408 are inverter circuits.

As shown in FIG. 2, the voltage of the telephone line 101 reverses its polarity once upon arrival of an incoming call, and when it is off hooked, it reverses its polarity again and returns to the original polarity. In this specific example, the hook state of the telephone line 101 is detected by detecting the polarity reversal.

In FIG. 4, first, in a normal state, the telephone line 101
Since the signal line L ₁ has a higher potential than the signal line L ₂ , the photocoupler 402 is off, the photocoupler 401 is on, the output a of the inverter circuit 407 is “H”, and the output of the inverter circuit 408 is b becomes "L". Next, when there is an incoming call,
Since the polarity of the voltage of the telephone line 101 is inverted and the potential of the signal line L ₂ is higher than that of the signal line L ₁ , the photocoupler 401 is turned off and the photocoupler 402 is turned on. Therefore, the output a of the inverter circuit 407 becomes "L" and the output b of the inverter circuit 408 becomes "H". After that, when the answering machine 114 (FIG. 1) goes off-hook, the polarity of the voltage of the telephone line 101 is inverted again, and the output a of the inverter circuit 407 becomes "H" and the output b of the inverter circuit 408 becomes "L". In this way, the hook state of the answering machine 114 can be detected by detecting the change in the output a of the inverter circuit 407 and the output b of the inverter circuit 408.

FIG. 5 is a circuit diagram showing still another embodiment of the hook state detection circuit 108 in FIG. 1, in which 501 to 505 are resistors, 506 and 507 are photocouplers, and 508 and 509 are inverter circuits. Corresponding parts are designated by the same reference numerals.

In this specific example, when an off-hook state (a state where the telephone line is closed in terms of direct current) occurs, a current flows through the telephone line. Therefore, by detecting this current, the hook state of the line is detected.

In FIG. 5, when the answering machine 114 goes off-hook in response to an incoming call, a current flows through the resistor 501 and a potential difference is generated across the resistor 501. Therefore, depending on the polarity of the voltage of the telephone line 101, the photo coupler 502 or the photo coupler 503
Turns on. For example, when the potential of the signal L ₁ is higher than that of the signal line L ₂ , the photocoupler 506 is turned on and the output c of the inverter circuit 508 becomes “H”. Therefore, the inverter circuit 508 output c
Alternatively, when the output d of the inverter circuit 509 is "H", the answering machine 114 is in the off-hook state.

In this case, answering machine 11
It is necessary to connect 4 between the switch 103 and the hook state detection circuit 108.

FIG. 6 is a circuit diagram showing a specific example of the incoming call detection circuit 107 in FIG. 1, in which 601 to 604 are diodes, 605 are photocouplers, 606 and 607 are capacitors, 608 to 610 are resistors, and 611 is an inverter circuit. Is.

In FIG. 6, when a calling signal is sent through the telephone line 101, only this calling signal is a capacitor.
It is separated by 606, is full-wave rectified by a rectifier composed of diodes 601-604, and is supplied to the photocoupler 605. Resistance 61
0, the capacitor 607 constitutes an integrating circuit, by which the calling signal is converted into a DC voltage of "H". Therefore, in this specific example, when the calling signal is detected, the output e of the inverter circuit 611 becomes "L" only during the period when the calling signal of 16 Hz is present. Therefore, by the main controller 109 monitoring this "L" output signal for a predetermined time,
Can detect incoming calls.

FIG. 7 is a circuit diagram showing a specific example of the termination circuit 104 in FIG. 1, in which 701 is an inductor, 702 is a resistor, and 70
3 is a so-called line transformer.

In the concrete example of FIG. 7 (a), the telephone line 101 is simply terminated by direct current. The specific example of FIG. 7B is to be terminated by the line transformer 703, and in this case, it is possible to terminate both in terms of direct current and alternating current. As such a line transformer, the impedance of the primary side and the secondary side is usually 600Ω, and the DC resistance of the primary side is 100Ω.
Use something of a degree.

FIG. 8 is a block diagram showing another embodiment of the telecontrol device according to the present invention, in which 102A and 102B are telecontrol devices, 113A is a controlled device as a VTR, 113B is an air conditioner as a controlled device, and 115 is This is a response order setting circuit, and the parts corresponding to those in FIG.

In this embodiment, a telecontrol device for controlling each of a plurality of controlled devices can be connected to the same telephone line.

In the figure, the VTR 113A is a telecontrol device 102A.
The air conditioner 113B is controlled by the telecontrol device 102B. Since the configurations of the telecontrol devices 102A and 102B are the same, the telecontrol device 102A will be described.

The telecontrol device 102A includes a response order setting circuit 1 in addition to the configuration of the telecontrol device 102 shown in FIG.
15 are provided. The response order setting circuit 115 includes
Data representing the response order of the telecontrol device is set. Here, the telecontrol device 102A for VTR
No. 3 data is set in the response order setting circuit 115 of
It is assumed that the data No. 2 is set in the response order setting circuit (not shown) of the tele-control device 102B for the air conditioner.

If there is an incoming call and a ringing signal arrives from the telephone line 101, the answering machine 114 will return the telephone line 1 after a certain time.
Set 01 to off-hook state and start operation. After that, when the answering machine 114 finishes its operation and the telephone line 101 goes into the on-hook state, the telecontrol device 102B for the air conditioner detects this and puts the telephone line 101 into the on-hook state to perform the telecontrol operation of the air conditioner 113B. . Then, when the telecontrol operation of the air conditioner ends and the telephone line 101 goes into the on-hook state, next, the hook state detection circuit 108 of the VTR telecontrol device 102A detects this and puts the telephone line 101 into the off-hook state. VTR113A
Perform the telecontrol operation of.

In this way, by setting the response order of the plurality of telecontrol devices separately, it is possible to connect them to the same telephone line.

Although the embodiments of the present invention have been described above, the controlled equipment of the telecontrol device is usually an air conditioner or a lighting.
A bath or the like is conceivable, but other than this, an answering machine or a line control unit of a facsimile machine may be used. Further, in each of the embodiments, the telecontrol device and the controlled device are separately provided, but the controlled device may of course have the telecontrol device built therein.

〔The invention's effect〕

As described above, according to the present invention, the telecontrol operation can be performed without being disturbed by the answering machine, and the operation of the answering machine is not disturbed. Therefore, it is the same as the answering machine. It can be used by using the telephone line.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a telecontrol device according to the present invention, and FIG. 2 is an operation explanatory view of this embodiment.
3 to 5 are circuit diagrams showing a concrete example of the hook state detecting circuit in FIG. 1, FIG. 6 is a circuit diagram showing a concrete example of the incoming call detecting circuit in FIG. 1, and FIG. a),
8B is a circuit diagram showing a specific example of the termination circuit in FIG. 1, and FIG. 8 is a block diagram showing another embodiment of the telecontrol device according to the present invention. 101… telephone line, 102,102A, 102B… telecontrol equipment,
103 ... Switch, 104 ... Termination circuit, 105 ... Control signal receiving circuit,
107 ... incoming call detection circuit, 108 ... hook state detection circuit, 113 ... controlled device.

Claims (1)

[Claims] 1. A telecontrol device which is connected to a telephone line and receives a control signal sent via the telephone line to control a controlled device, wherein an incoming call detecting means for detecting an incoming call from the telephone line. And a hook detecting means for detecting a hook state of the telephone line is provided, and the incoming call detecting means detects an incoming call from the telephone line,
Subsequently, the hook detection means is configured to be in the receivable state of the control signal when it is detected that the telephone line is changed from the on-hook state to the off-hook state and is changed from the off-hook state to the on-hook state. A telecontrol device characterized in that