JPH0344705B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention outputs a status signal regarding the operating state from a first device that performs a predetermined operation to a second device, and outputs a status signal regarding the operating state from the second device to the first device. The present invention relates to a control method for controlling the operation of a first device by outputting a control signal to the device.

[Summary of the invention]

The present invention outputs a status signal related to the operating state from a first device that performs a predetermined operation to a second device, and outputs a control signal from the second device to the first device to control the operation of the first device. In the control method, the state signal is a signal of a first level and a second level different from the first level, the non-energized state of the first device corresponds to the first level, and the state signal is a signal of a second level different from the first level. The energization state of the device corresponds to the second level, and the energization state corresponds to the first level.
The operating state of the first device corresponds to the first level, and the inactive state of the first device corresponds to the second level, and the operation of the first device is controlled by a simple and low-cost configuration. It was made so that it could be done.

[Conventional technology]

Conventionally, when connecting an adapter to a tape recorder to operate an answering machine, for example, the fourth
It was configured as shown in the figure. In the same figure, 1
is a portable tape recorder that is capable of recording and reproducing audio signals on magnetic tape housed in a cassette or microcassette. 2 is an adapter, and tape recorder 1
is now connected to a telephone line. The adapter 2 inputs a remote control signal (control signal) to a remote control signal input terminal of the tape recorder 1 to control its operation.

When a call signal arrives from the telephone line, the adapter 2 detects it and closes the telephone line.
A control signal A is output to the tape recorder 1. This control signal causes the tape recorder 1 to start playing back the built-in cassette tape. Therefore, a response message previously recorded on a magnetic tape is sent to the caller via the telephone line, thereby realizing an answering machine function.

[Problem that the invention seeks to solve]

In this way, the conventional control method transmits a remote control signal (control signal) from the adapter 2 to the remote control signal input terminal of the tape recorder 1.
Since the operation of tape recorder 1 is simply controlled by inputting The drawback was that unnecessary troubles such as closures were likely to occur.

[Means for solving problems]

A control method according to the present invention is a control method in which a second device outputs a control signal to a first device that performs a predetermined operation, and the operation of the first device is controlled based on the control signal. , the first device outputs a status signal regarding its operating state to the second device, and the status signal includes a first level consisting of a predetermined DC component and a predetermined DC component different from the first level. a signal varying between a second level, the first level representing a non-energized state of the first device or a energized state and operating state of the first device; represents the energized state and non-operating state of the first device, and when the second device outputs the control signal of the energized state command to the first device, the level of the DC component of the state signal is Depending on whether or not the first device is reversed, it is determined whether the first device is in a de-energized state or in an energized and operating state.

[Effect]

In the present invention, a status signal consisting of a first or second level representing the presence or absence of an operation in the first device is output from a first device on the controlled side to a second device on the control side. Based on the signal level of this status signal, the second device can detect whether the first device is energized and non-operating, or whether it is de-energized or energized and operating. Furthermore, the second device outputs a control signal of an energization state command to the first device, the first device operates based on this control signal, and after this operation, the first device outputs a control signal. A second device detects whether the level of the DC component of the state signal is inverted. Based on this detection result, the second device can detect whether the first device is in a de-energized state or in an energized and operating state. In this way, the second device can determine the three aspects of the first device, namely, the de-energized state, the energized state and the operating state, or the energized state and the non-operating state, based on the state signal, and the second device can determine the three aspects of the first device: Control operations safely and appropriately.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a block diagram of an apparatus implementing the control method of the present invention. In the same figure, 11
12 is a double deck, 12 is an amplifier, 13 is a speaker system, and 14 is a tuner (or the same applies to a record player, a digital audio disc player, etc.), and these constitute a high-fidelity audio device. Reference numeral 15 denotes an adapter that is added as necessary when realizing an answering machine function using the high-fidelity audio device.
The adapter 15 sends the control signal A to the double deck 11.
Also, the double deck 11 outputs a status signal B to the adapter 15 indicating its operating status.

The double deck 11 has at least a playback deck 31 and a recording and playback deck 32. 33 is a control circuit consisting of a microcomputer, etc., which includes decks 31, 32 and switching means 3.
4. Control the power supply circuit 35, etc. The reproduced signal from the deck 31 is output to the switching means 34. Further, the reproduction signal and the recording signal are transmitted and received between the deck 32 and the switching means 34. A terminal I of the control circuit 33 is connected to a predetermined reference voltage via a resistor 36 and a diode 37.
It is connected to the adapter 15 via. Further, the terminal O of the control circuit 33 is connected via a resistor 38 to the base of an NPN transistor 39 whose emitter is grounded.

On the other hand, the adapter 15 has a switching means 41. The switching means 41 is connected to the switching means 34 of the double deck 11, the amplifier 12, and the telephone line, and is configured to switch the connections therebetween. 42 is a detection circuit that detects a calling signal from the telephone line. 43 is a detection circuit that detects a marker signal of a predetermined frequency. 44 is a control circuit such as a microcomputer, which controls various circuits, means, etc. The terminal O of the control circuit 44 is connected via the resistor 45.
It is connected to the base of NPN transistor 46. The emitter of the transistor 46 is grounded, and the collector is connected to a predetermined reference voltage via a diode 47 and a resistor 48. Also, the control circuit 44
Terminal I is connected to a predetermined reference voltage via a resistor 49, and is also connected to the collector of the transistor 39 of the double deck 11. 50
is the switch that is turned on when the answering machine is activated.

The output of the amplifier 12 is supplied to a speaker system 13, and the output of the tuner 14 is supplied to the amplifier 12.

The effect will now be explained. When operating as a normal high-speed audio device without realizing the answering machine function, switch 5 of the adapter 15
0 is turned off.

For example, when a copy operation is commanded in such a state, the control circuit 33 controls the switching means 34 to input the playback signal from the deck 31 to the deck 32 as a recording signal. At this time, the decks 31 and 32 are operable because power is supplied from the power supply circuit 35 which is controlled by the control circuit 33 and turned on. Therefore, the reproduced signal from the magnetic tape on the deck 31 can be recorded on the magnetic tape on the deck 32.

Further, when the switch 50 is off, the control circuit 44
controls the switching means 41 and connects the switching means 34 of the double deck 11 to the amplifier 12. Therefore, by selecting the function mode of the amplifier 12 as deck, the reproduced signal from the deck 31 or 32 can be input to the amplifier 12, amplified, and output to the speaker system 13. In addition, by selecting the function mode of the amplifier 12 as tuner, the playback signal from the tuner 14 is transferred to the deck 3.
2 as a recording signal, and can be recorded on the magnetic tape.

Next, when performing an answering machine operation, the switch 50 of the adapter 15 is turned on. At this time, the control circuit 44 inverts the output of the terminal O from a low level to a high level for a relatively short predetermined period of time. Therefore resistance 4
A high level pulse is input to the base through the transistor 5, during which the transistor 46 is turned on. As a result, a low level control signal A is input to the diode 37 of the double deck 11, the diode 37 is turned on, one end of the resistor 36 is grounded via the transistor 46, and a low level signal (A) is input to the terminal I of the control circuit 33. pulse) is input. For example, the interval between the generation of such a pulse and the generation of the next pulse is set to be logical 1 and 0, so that a code signal of a predetermined bit is expressed. The control circuit 44 outputs a predetermined code signal (pulse train) when performing a predetermined operation, and when the predetermined pulse train is input to its terminal I, the control circuit 33 performs a predetermined operation corresponding to the code, and It is preprogrammed to output a predetermined status signal. For example, when the double deck 11 is in a standby state with no power supplied (however, backup power is still supplied to the control circuit 33 etc.), the control circuit 33 outputs a low level signal from its terminal O, and the transistor 39 is turned on. Turn it off. Therefore, a high level status signal B is input to the terminal I of the control circuit 44 via the resistor 49 in the adapter 15.

In such a standby state, a predetermined operation is performed according to a flowchart as shown in FIG. 3, for example. That is, first, when the detection circuit 42 detects a calling signal (bell signal), the control circuit 44 determines whether the status signal B from the double deck 11 is at a low level. Here, control circuits 33 and 44
, a low level status signal causes the double deck deck 11 to be energized and inactive (stopped), and a high level status signal causes the double deck deck 11 to be in the energized state and inactive (stopped) state.
The non-energized state of the double deck 11 or the energized state and operation (play) state of the double deck 11 are respectively made to correspond to the non-energized state.
Therefore, when the status signal is not at a low level, the control circuit 44 determines that the double deck 11 is in a non-energized state, outputs a high level pulse train from the terminal O, and sends a low level control signal (pulse train) to the control circuit 33. (FIG. 2A; in the same figure, for convenience, a code signal consisting of a pulse train is shown as one pulse). At this time, the control circuit 33 turns on the power supply circuit 35 to turn on the double deck 11 and outputs a high level signal from the terminal O to turn on the transistor 39. Therefore, a low level status signal is input to the terminal I of the control circuit 44 (FIG. 2B). When a control signal is output to make the double deck 11 energized, the control circuit 44 then sets a flag in the built-in register (F=1). After waiting for a predetermined time sufficient for the power supply circuit 35 to turn on, the level of the status signal is determined again. When the status signal is not at a low level (energized state), the flag is reset (F=
0), and perform error handling as if some kind of failure had occurred (for example, take measures such as prohibiting all answering machine operations from now on).

When the control circuit 44 detects the calling signal, it determines that the double deck 11 is already in the energized state if the status signal is at a low level, and outputs a control signal from the terminal O after waiting for a predetermined time. At this time, the control circuit 33 causes the magnetic tape on the deck 31 to run in the forward direction, starts the playback operation, and outputs a high level signal from the terminal O to invert the status signal to a high level (see FIG. 2B). ). On the other hand, control circuit 4
4 simultaneously starts a timer for time T ₁ and determines whether the status signal has become high level (play) by the time T ₁ has elapsed. Predetermined time T ₁
Error handling occurs when a high level status signal is not obtained within the specified time. When a high level status signal is obtained within the predetermined time _T1 , the control circuit 44 closes the telephone line and controls the switching means 41,
The telephone circuit is connected to the switching means 34. Therefore, the response message previously recorded on the magnetic tape of the deck 31 is sent out to the telephone line, and a message sending operation is performed.

When the message sending operation is started, the timer operation of execution _T2 is started at the same time. During time _T2 , the status signal and the marker signal recorded at the end of the response message on the magnetic tape of the deck 31 are monitored. If the status signal is inverted to a low level before time T ₂ has elapsed, or if the marker signal is not detected by the detection circuit 43 even after time T ₂ has elapsed, error processing is performed. When the detection circuit 43 detects the marker signal, the control circuit 44 outputs a control signal to the control circuit 33. time T ₃ at the same time
The timer operation is started, and the control circuit 33
If the running of the magnetic tape on the deck 31 is not stopped (inverting the status signal to a low level) within _T3 , error processing is performed.

When the running of the magnetic tape on the deck 31 is stopped within time _T3 and the status signal is inverted to a low level, the control circuit 44 outputs a control signal to the control circuit 33, causing the deck 32 to move the magnetic tape in the forward direction. Run it in recording mode. Simultaneously with the command to run the magnetic tape on the deck 32, a timer operation for time _T4 is started. Error processing is performed when the magnetic tape does not start running (the status signal is inverted to high level) in the recording state within time _T4 . When the magnetic tape starts running in the recording state within time _T4 and the state signal is inverted to a high level, the control circuit 44 switches the switching means 4
1 to connect the telephone line to the switching means 34. Therefore, a message recording operation is performed in which a caller's message input via the telephone line is recorded on the magnetic tape of the deck 32.

At the same time as the message recording operation starts, time T ₅
The timer operation is started. The status signal is monitored for a time _T5 , during which error handling occurs when the status signal flips to a low level. When time _T5 has elapsed, control circuit 44 issues a control signal to control circuit 33. At this time, the control circuit 33
The running of the magnetic tape No. 2 is stopped, the recording state is canceled, and the state signal is inverted to a low level. Error handling occurs if the status signal does not flip to a low level within time _T6 .

When the status signal is inverted to low level (when the recording status is released) within time _T6 , the control circuit 44
A control signal is sent to the control circuit 33, and the control circuit 33 causes the deck 31 to travel in the opposite direction at high speed (rewind). Also in this case, if rewind is not started within time _T7 , error processing is performed.

Rewind is initiated within time T ₇ and when the status signal flips to a high level, a timer operation at time T ₈ is initiated. If rewinding is not completed within time _T8 , error processing is performed.

When the magnetic tape is rewound to the starting point and stopped within time T ₈ and the status signal is reversed to low level,
A control signal is sent from the control circuit 44 to the control circuit 33, and the magnetic tape on the deck 31 is run in the forward direction. Error processing is performed when running is not started within time _T9 .

When running is started within time T ₉ and the status signal is inverted to high level, a timer operation at time T ₁₀ is started. The timer running status signal at time _T10 is monitored and error handling occurs when the status signal flips to a low level during that time.

When the time _T10 has elapsed, a control signal is sent from the control circuit 44 to the control circuit 33, and the running of the magnetic tape on the deck 31 is stopped. Since this time _T10 corresponds to the time from the start point of the magnetic tape to the start point of the response message, the response message is cued. If the magnetic tape does not stop even after time _T11 has elapsed after outputting the stop signal, error processing is performed.

When the magnetic tape stops and the status signal goes low within time _T11 , it is then determined whether a flag is set in the register (F=1). When the flag is set (F=1), a calling signal is detected and the power is turned on, so a control signal is output from the control circuit 44 to the control circuit 33, and the power supply circuit 35 is turned off. After resetting the register (to F=0), the telephone line is opened and the system enters a standby state.

When the flag is not set (when F=0)
Since the power supply circuit 35 was already on when the calling signal was detected, the telephone line is opened and the telephone line is shifted to the standby state without turning off the power supply circuit 35. In this way, in the above, the power supply circuit 35 of the double deck 11 is directly controlled by the adapter 15, but for example, the power supply circuit 35 of the double deck 11 is supplied from the amplifier 12, and the power circuit 35 of the double deck 11 is directly controlled by the adapter 15.
An advantage arises when the power supply of the double deck 11 is indirectly controlled by controlling the power supply of the amplifier 12. That is, for example, when the reproduced signal from the tuner 14 is output to the speaker system 13 via the amplifier 12, the tuner 1
4, it becomes possible to realize the above-described answering machine operation without interfering with playback.

Also, if you accidentally turn on the switch 50 while using the double deck 11 (for example, during a copy operation),
When the calling signal is detected and the control signal is issued, the decks 31 and 32 are in operation, so the status signal is at a high level (meaning in operation or in a non-energized state). Therefore, a control signal is issued from the control circuit 44 to the control circuit 33 to turn on the power, and the register is set. However, since the operation of the power supply circuit 35, which is already on, does not change, the status signal is inverted to a low level. do not. As a result, the registers are reset, error handling is performed, and no answering machine operation is performed.

Although the above description has been made using an example in which the operation of the double deck 11 is controlled by the adapter 15, the controlling device and the controlled device are not limited to this, and it is also possible to control an audio-visual device by a remote control device, The present invention can also be applied to cases where household electronic devices and the like are controlled using a telephone line. Furthermore, control signals or status signals can also be transmitted and received wirelessly.

〔effect〕

As explained above, according to the present invention, a status signal indicating the presence or absence of an operation in the first device on the controlled side is output to the second device on the control side, and the second device transmits the signal to the first device. By detecting whether or not the level of the status signal is inverted when a control signal for the energized state command is output using the first device, it is possible to determine whether the first device is in the de-energized state, the energized state and the operating state, or the energized state and the non-operating state. Each of the three aspects can be determined on the second device side based on the status signals, and the second device can safely and efficiently control the first device without requiring many status signals (many codes). This has the effect of allowing proper control. Therefore, an answering machine function can be realized with a simple configuration by simply adding an adapter without making any major changes to the high-fidelity audio device, which includes, for example, a so-called double deck, an amplifier, a speaker system, etc.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an apparatus implementing the control method of the present invention, FIG. 2 is a waveform diagram thereof, FIG. 3 is a flowchart thereof, and FIG. 4 is a block diagram of an apparatus implementing the conventional control method. . 1...Tape recorder, 2...Adapter, 11
...Double deck, 12...Amplifier, 13...Speaker system, 14...Tuner, 15...Adapter, 31,32...Deck, 33,34...
Control circuit, 34, 41...Switching means, 42...Detection circuit, 43...Detection circuit.

Claims (1)

[Claims] 1. A control method in which a second device outputs a control signal to a first device that executes a predetermined operation, and controls the operation of the first device based on the control signal, The first device outputs a status signal related to its operating state to the second device, and the status signal includes a first level consisting of a predetermined DC component and a second level consisting of a predetermined DC component different from the first level. a signal that fluctuates between two levels, the first level representing a non-energized state of the first device or an energized and operating state of the first device; The second device represents an energized state and a non-operating state of the first device, and when the second device outputs a control signal of a energized state command to the first device, the level of the DC component of the state signal is inverted. The first one depends on whether you do it or not.
A control method characterized by determining whether the device is in a de-energized state or in an energized and operating state.