KR100347081B1 - The cut-off circuit of the gas valve with utilizing the bell sounds of the telephone. - Google Patents

Abstract

The present invention relates to a gas valve blocking circuit by a telephone bell count, in particular, it is attached to an existing telephone line to count the ringer signal, and if the ringer signal is repeated a certain number of times, the home gas valve is shut off to prevent leakage of gas even when going out. The present invention relates to a gas valve shutoff circuit with a telephone bell count for remote control.

To this end, the present invention includes a ringer signal detector for detecting a ringer signal from the telephone line to generate a gentle pulse signal; A first trigger unit for receiving a pulse signal output from the ringer signal detector and triggering the pulse signal to generate a precise square wave; A first counting unit configured to ripple count the square wave output from the first trigger unit; A count control unit for resetting a value of the first counting unit when the square wave is not output from the first trigger unit; An open / close switch for applying a voltage signal of a “high” level once; A second trigger unit configured to receive a voltage signal from the open / close switch to trigger and generate a precise square wave; A second counting unit configured to receive a square wave output from the second trigger unit and to ripple count the reset unit according to a logic value of the most significant bit of the first counting unit; A buffer unit which receives the lowest bit value of the second counting unit and buffers and outputs the buffered bit; It consists of a drive unit for driving the gas valve switch in accordance with the voltage signal output from the buffer unit,

Accordingly, at home, the gas valve can be opened / blocked by an on / off switch, and when the call is made, the gas valve is automatically shut off without further manipulation by the user unless the incoming call is repeated for a predetermined number of times after the call. Operation has the effect of preventing the gas safety accident, the user's operating environment has a very simple advantage.

Description

The cut-off circuit of the gas valve with utilizing the bell sounds of the telephone.

The present invention relates to a gas valve blocking circuit by a telephone bell count, in particular, it is attached to an existing telephone line to count the ringer signal, and if the ringer signal is repeated a predetermined number of times, the home gas valve is shut off to prevent leakage of gas even when going out. The present invention relates to a gas valve shutoff circuit with a telephone bell count for remote control.

Recently, automation equipment such as factory automation system or office automation system has been widely used in daily life, and automation systems have already been introduced to general households, and thus, automatic crime prevention and fire occurrences have occurred. Remote control devices have been developed and used to notify or prevent accidents.

However, the home automation system is a very expensive system and has not been widely used yet. In the case of a system capable of remote control, the user's operation environment is difficult and it is difficult for everyone in the family to easily use. .

One of the most frequent safety accidents in the home is a gas leak. For example, a conventional SARS valve remote control system is in charge of control by using a telephone when going out. After dialing several times, the automatic incoming light is made and the password is checked and the opening and closing is controlled using the number buttons of the phone according to the guide message.

However, the conventional remote control systems as described above are cumbersome and difficult to use, and have a large manufacturing cost burden due to complicated circuits using a microprocessor or the like.

Therefore, the present invention has been proposed to solve the problems of the prior art, by counting the incoming ringer signal of the telephone using a simple logic and RC circuit and by using the remote control to automatically shut off the gas valve, the user's operation Its purpose is to provide a gas valve shutoff circuit that simplifies the environment.

To achieve the above object, the present invention provides a ringer signal detection unit for detecting a ringer signal from a telephone line and generating a gentle pulse signal; A first trigger unit for receiving a pulse signal output from the ringer signal detector and triggering the pulse signal to generate a precise square wave; A first counting unit configured to ripple count the square wave output from the first trigger unit; A count control unit for resetting a value of the first counting unit when the square wave is not output from the first trigger unit; An open / close switch for applying a voltage signal of a “high” level once; A second trigger unit configured to receive a voltage signal from the open / close switch to trigger and generate a precise square wave; A second counting unit configured to receive a square wave output from the second trigger unit and to ripple count the reset unit according to a logic value of the most significant bit of the first counting unit; A buffer unit which receives the lowest bit value of the second counting unit and buffers and outputs the buffered bit; It consists of a drive part which drives a gas valve switchgear according to the voltage signal output from this buffer part.

1-a circuit diagram showing a gas valve blocking circuit according to the present invention.

2 is a circuit diagram showing the configuration of a ringer signal detection unit of the present invention.

3 is a circuit diagram showing the configuration of a count control unit of the present invention.

4-a circuit diagram showing a configuration of a drive unit of the present invention.

5 is a circuit diagram showing a configuration of a control signal generator.

Fig. 6-Circuit diagram showing the configuration of the incoming call control section.

7 is a circuit diagram showing a configuration of a reproduction signal generator.

Explanation of symbols on the main parts of the drawings

1 ringer signal detection unit 2 second trigger unit

3: first counting unit 4: count control unit

5: 2nd trigger part 6: 2nd counting part

7: buffer part 8: drive part

9: control signal generating unit 10: incoming control unit

NAND1 ~ NAND6: NAND Gate SW: Switch

C3, C4, C6: Capacitor R3, R4, R6, R7: Resistance

Hereinafter, with reference to the accompanying Figures 1 to 7 will be described the technical configuration and operation of the present invention.

1 is a circuit diagram showing the configuration of a gas valve shutoff circuit by a telephone bell count according to the present invention.

The gas valve blocking circuit according to the present invention includes: a ringer signal detector (1) for detecting a ringer signal from a telephone line and generating a gentle pulse signal; A first trigger unit 2 for receiving and triggering a pulse signal output from the ringer signal detector 1 to generate a precise square wave; A first counting unit 3 which ripples the square wave output from the first trigger unit 2; A count control unit 4 for resetting the count value of the first counting unit 3 when the square wave is not output from the first trigger unit 2; An open / close switch (SW) for applying a voltage signal of a "high" level once; A second trigger unit 5 for receiving a voltage signal from the open / close switch SW to trigger and generate a precise square wave; A second counting unit 6 which receives the square wave output from the second triggering unit 5 and ripples the counting, and resets the logic wave according to the logic value of the most significant bit of the first counting unit 3; A buffer unit 7 for receiving and buffering the lowest bit value of the second counting unit 6 and outputting it; And a drive section 8 for driving a gas valve switch (not shown) in accordance with the voltage signal output from the buffer section 7.

Fig. 2 is a circuit diagram showing the ringer signal detection unit 1 of the present invention, and its operation relationship is as follows.

As shown in Fig. 2, the ringer signal detection unit 1 of the present invention is connected to the telephone lines L1 and L2 in parallel and detects only the ringer signal that is an AC component through the capacitors C1 and C2. And an amplifier 12 for half-wave rectifying and amplifying the voltage signal generated by the detector 11 to generate a gentle pulse signal. Here, the amplifier 12 outputs the voltage of the N1 node to the first trigger unit 2. When the ringer signal is not detected, the amplifier 12 outputs a "high" level voltage signal, and detects the ringer signal, "low" level. This generates a gentle pulse signal that transitions to.

The first trigger unit 2 includes NAND bases NAND1 and NAND2 having two input terminals connected to each other. A capacitor C4 and a resistor R3 coupled in parallel with the power supply voltage VDD and the resistor R3 are connected to the input side, and thus, "normal-high". "The input provides a stable operating state. Here, the NAND bases NAND1 and NAND2 receive a gentle pulse signal and operate to output a precise square wave, thereby preventing a malfunction due to noise introduced into the signal.

On the output side of the NAND base NAND2, a resistor (R4) connected to ground is combined to provide stable operation with a "normal-low" output. Here, the output square wave is input to the first counting unit 3 to count the number of ringer signal occurrences.

As shown in FIG. 3, the count controller 4 switches a capacitor C5 connected in parallel with the power supply voltage VDD and the other end voltage of the resistor R5 according to the output level of the NAND base NAND1. Will output using (Q2). Therefore, the count control unit 4 outputs a voltage of the "low" level, which is the ground voltage while the square wave is applied from the first trigger unit 2, that is, the ringer signal is detected through the telephone line. Therefore, the output of the counter control section 4 outputs a control signal of "high" level if the ringer signal is not detected, and outputs a control signal of "low" level only when the ringer signal is detected.

This control signal is input to the reset terminal of the first counting section 3.

Accordingly, the first counting unit 3 resets the count value while the control signal of the "high" level is input to the reset terminal, and the NAND base NAND2 during the ringer signal generation / detection period in which the control signal of the "low" level is input. Ripple counts from square wave output from In the circuit diagram shown in Fig. 1, the first counting section 3 is made up of a 4-bit ripple counter to output the value of the most significant bit (Count1). Therefore, the first counting unit 3 outputs a voltage signal Count1 having a "high" level when the ringer signal is repeatedly input eight times.

Then, the opening and closing switch (SW) is composed of a one-touch opening and closing switch for applying the power supply voltage of the "high" level once, so that a gentle pulse signal of "high" level having an arbitrary width every time the user presses the button once. Is applied to the second trigger section 5.

The second trigger unit 5 is composed of a NAND base NAND3 having two input terminals connected to each other. A capacitor C6 and a resistor R7 coupled in parallel with the ground are coupled to the input side to stably maintain a "normal-low" input state. It is configured to maintain. Therefore, the second trigger unit 5 receives a gentle pulse signal of an arbitrary width applied from the on / off switch SW to trigger a precise square wave of a “high” level, which is then input by the second counting unit 6. To print.

The second counting unit 6 receives the square wave output from the second triggering unit 5 and ripples the counting operation to output the least significant bit value to the buffer unit 7, and outputs the count value 1 of the first counting unit 3. ) To reset.

Accordingly, the output value of the second counting unit 6 is rippled every time the user presses the open / close switch SW.

That is, for example, when the user presses the opening / closing switch SW once, the output Count2 of the second counting unit 6 becomes “high”, and after pressing the opening / closing switch SW once, the second counting is performed. The output Count2 of the unit 6 becomes " low " and once the on / off switch SW is pressed again, " high "

The output Count2 level control of the second counting unit 6 by the operation of the opening / closing switch SW is an operation state when a signal having a low level is input to the reset terminal of the second counting unit 6. .

Here, since the most significant bit output value of the first counting unit is applied to the reset terminal of the second counting unit 6, when the ringer signal is counted 8 times or more, the output Count2 of the second counting unit 6 is an open / close switch (SW). Outputs a voltage signal Count2 at a "low" level at any time.

The buffer unit 7 includes NAND bases NAND4, NAND5, and NAND6 having two input terminals connected to each other, and receives and buffers the output Count2 of the second counting unit 6 so as to be stable and “low” or “high”. The voltage of the level is output to the driver 8 through the NAND base NAND4 and the NAND base NAND6, respectively.

4 is a circuit diagram showing the drive unit 8 of the present invention.

The driving unit 8 of the present invention applies a driving voltage for opening or closing a gas valve switch (not shown) according to the voltage level output from the buffer unit 7 through the switch leads 1 and 2 (GL1 and GL2). do.

That is, as shown in FIG. 4, when a "high" level voltage is applied from the buffer unit 7, the transistor Q3 receiving the "high" level voltage via the diode D3 is turned on. The ground voltage is applied to the switch lead wire GL1. As the potential of the switch lead wire GL1 becomes "low", the transistor Q6 is turned on, and the power supply voltage VDD is applied to the switch lead wire GL2.

As such, when the power supply voltage VDD is applied to the switch lead wire GL2 and a ground voltage is applied to the switch lead wire GL1, the gas valve switch (not shown) operates to open the valve.

When the voltage of the "low" level is applied from the buffer unit 7, the transistor Q4 receiving the voltage of the "low" level via the diode D4 is turned on to supply power to the switch lead wire GL1. The voltage VDD is applied. As the potential of the switch lead wire GL1 becomes "high", the transistor Q5 is turned on, and a ground voltage is applied to the switch lead wire GL2.

As such, when the power supply voltage VDD is applied to the switch lead wire GL1 and the ground voltage is applied to the switch lead wire GL2, the gas valve switch (not shown) operates to shut off the valve.

As described above, the gas valve blocking circuit by the telephone ring count according to the present invention can open / block the gas valve by the user pressing the opening / closing switch SW at home, and the gas valve blocking circuit of the present invention when going out. If you make a call to a phone with an alarm and you hear eight beeps, the gas valve can be shut off automatically.

In addition, it is more convenient to further include an answering machine with an automatic incoming call function in the present invention described above.

For example, the control signal generator 9 further includes a control signal generator 9 that receives the output Count1 of the first counting unit 3 and outputs a control signal having an arbitrary logic level. In accordance with the logic level of the control signal output from the Equipped with the incoming call control unit 10 for receiving the call can be configured to automatically receive the call after ringing eight times.

5 is a circuit diagram showing the configuration of the control signal generator 9, and FIG. 6 is a circuit diagram showing the configuration of the terminating control unit 10. As shown in FIG.

When the phone rings eight times or more, the first counting unit 3 outputs a voltage signal having a "high" level, and the transistor Q7 receiving the voltage inverting the voltage signal Count1 as a base is turned on. The control signal generator 9 outputs a voltage signal of "high" level.

The transistor Q8, which receives the “high” level voltage signal output from the control signal generator 9 as a base, is turned on to operate a relay to receive a telephone call.

Here, an audio recording and reproducing apparatus (not shown) is provided, and as shown in FIG. 7, a reproducing signal generating unit for applying a voltage of the N2 node as a base and outputting a ground voltage is further provided. When the P signal generated by the signal is applied as a playback enable signal of a voice recording and reproducing apparatus (not shown), it is possible to confirm whether or not the shut-off operation of the gas valve is performed on the telephone according to the recorded voice message.

As described above, the gas valve shutoff circuit by the telephone ring count according to the present invention can be conveniently attached to the existing telephone line, the home valve can be opened / closed by the on / off switch, and when the call is If you do not make an incoming call for a certain number of times after the call, you can automatically shut off the gas valve without any additional operation by the user, thus preventing gas safety accidents. have.

In addition, if the additional automatic response function is provided, the user can directly confirm the operation of the gas shut-off circuit by voice.

Claims (3)

A ringer signal detection unit 1 for detecting a ringer signal from the telephone line and generating a gentle pulse signal; A first trigger number (2) for receiving and triggering a pulse signal output from the ringer signal detector (1) to generate a precise square wave; A first counting unit 3 for ripple counting the square wave output from the first triggering unit 2; A count control unit (4) for resetting the count value of the first counting unit (3) when the square wave is not output from the first trigger unit (2); An open / close switch for applying a voltage signal of a high level once; A second trigger unit 5 for generating a precise square wave by receiving a voltage signal from the on / off switch; A second counting unit (6) for receiving a square wave output from the second trigger unit (5) and ripple counting and resetting it according to a logic value of the most significant bit of the first counting unit (3); An answering machine for answering a call and reproducing a recorded voice message according to a logic level of the most significant bit output value of the first counting unit 3; A buffer unit 7 for receiving and buffering the lowest bit value of the second counting unit 6 and outputting the result; And a driving unit (8) for driving the gas valve switch according to the voltage signal output from the buffer unit (7). delete The method of claim 1, The first and second triggers (2) (5) is a gas valve blocking circuit by the telephone bell count, characterized in that each of the two input terminals are connected to each other made of NAND gates.