JPS6328397B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to an opening/closing control device that controls a plurality of receiving sections using a signal from a transmitting section, and particularly to a circuit configuration that prevents erroneous control during simultaneous closing operations. Conventionally, in order to centrally control a large number of receivers from a central transmitter, a switch was placed in each receiver that operates individually in response to the closing operation at the central transmitter, providing one-to-one control. It was getting worse. This control method does not pick up electromagnetic noise, so there is no need to worry about malfunctions, and it is a reliable method, but it requires a control line for each controlled object, and if the number of controlled areas is n, one common line (ground (n+1) control lines are required, and when there are many objects to be controlled, the wiring materials and construction costs for the control lines become enormous, resulting in high costs. In order to eliminate this drawback, the operation signal is converted into a binary code, an address code is set for each controlled object, and a circuit is provided to decode it. Control is performed by selectively opening and closing the controlled object using the predetermined address code. A method for reducing the number of lines and construction costs has already been filed by the present applicant. The method will be explained with reference to the circuit diagram shown in FIG. In this circuit diagram, a control line 3 connecting transmitter 1 and receiver 2
This is an example when is a 4-conductor. If one of the four conductors is designated as a common line _3E , the remaining three conductors can be used for signals, so they are designated as 3 ₁ to 3 ₃ . The transmitter 1 is provided with three control relays _RY1 to _RY3 , and the closing contacts of the control relays are connected to control lines 3 ₁ to 3 ₃ correspondingly, respectively. In addition, operation switches C ₁ to C ₇ are arranged in the transmitter 1, and between the operation switches and control relays R _Y1 to R _Y3 ,
For example, by providing an encoding circuit 4 consisting of diodes arranged in a matrix, and selecting and energizing only the control relay R _Y1 when operating the operation switch _C1 to close the circuit, the following table shows As shown, seven combinations are obtained.

[Table] The closing contacts of control relays R _Y1 to _{R Y3} are connected to control lines ₃₁ to _33, respectively, so the control relays
Seven types of signals can be obtained depending on the number of combinations of energizations R _Y1 to R _Y3 . Next, each of the seven receiving sections 2 ₁ to 2 ₇ has a closing contact or an opening contact 1.
Three sets of receiving relays R _A1 to R _A3 ...... R _G1 to R _G3 each are arranged, and for example, in the receiving section ₂₁ , the closing contact of the receiving relay R _A1 connected to the control line ₃₁ and the control line 3 are arranged. ₂ , 3 Receive relay R _A2 connected to ₃ ,
Connect in series with the open contact of R _A3 . Furthermore, in each of the receiving sections ₂₁ to ₂₇ , the open contacts of the receiving relays are always a combination of at least one set in a different order, and when the control relays R _Y1 to R _Y3 in the table above are energized, the closed contacts and the energized ones are used. If not, seven types of receiving sections 2 can be configured by connecting them in series as open contacts. Thus, by operating the operating switch _C1 of the transmitting section 1, the receiving section ₂₁ is activated. In this way, seven signals can be sent using four control lines, whereas conventional one-to-one signals would only send three signals. Generally, if the number of control lines is n, by using one as a common line, (n-1) lines can be used for signals, and [2 ^(n-1) -1] signals can be sent. . For example, with six control lines, 31 signals can be sent, and with eight control lines, 127 signals can be sent, so signals can be sent with an extremely small number of control lines compared to the number of carrier signals. In the opening/closing control device with such a configuration, when the operation signals are given completely independently in time under the supervision of one operator, the predetermined control object address code is generated accurately and the purpose is Opening/closing control can be performed. However, in the case of automatic operation or simultaneous operations by multiple operators, multiple operation signals may be input at the same time. For example, in FIG. 1, when operating switch C ₁ is operated to close the circuit, when operating switch C ₂ is operated to close the circuit, control relays R _Y1 and R _Y2 are energized, and control relay R _Y3 is activated.
is not energized. In this state, as is clear from the above table, the receiver 2 that operates is not the target receivers 2 ₁ and 2 ₂ but the receiver 2 ₄ that is not the target of operation and is selected and operates. In other words, this opening/closing control device has the disadvantage that erroneous selection occurs when simultaneous closing operations are performed. The object of the present invention is to eliminate the above-mentioned drawbacks and to provide an opening/closing control device that does not cause erroneous selection even if simultaneous closing operations are performed. According to the present invention, the above object is to convert an operation signal from an operation switch provided for each controlled object to be opened/closed into a parallel address code set for each controlled object by an encoding circuit, and The address code signal is sent in parallel to the controlled object side via a plurality of lines, and the controlled object side accepts the signal through a logic circuit that accepts only the address code signal that matches the set address code, and operates the operating switch. In an opening/closing control device that opens and closes a controlled object specified by;
Simultaneous operation prevention circuit that disables operation signals issued from other operation switches at least during the period after the operation signal is issued from the operation switch until the opening/closing operation of the controlled object specified by the operation switch is completed. This can be achieved by providing the above-mentioned operation switch and the above-mentioned encoding circuit. Embodiments of the present invention will be described below based on the drawings. FIG _. 2 is a circuit diagram of a switching control device that is an embodiment of the present invention _. A closing prevention circuit 5 is provided. Since the circuit configuration of this simultaneous closing prevention circuit differs depending on the type and structure of the operation switch, the simultaneous closing prevention circuit corresponding to each operation switch will be explained below. First, when the operation switch is an automatic return switch such as a push button switch and the operation signal is transmitted as a pulse signal, the simultaneous closing prevention circuit is as shown in FIG. That is, in the figure, 11 _-1 to 11 _-o are push button switches P ₁ to _{P o
12-1} to 12 _-o are logic circuits, and _13-1 to 13 _-o are logic circuits that are controlled by the outputs of _12-1 to 12 _-o in the receiving section. an operation pulse generation circuit that generates an output whose pulse width can be varied according to the operating time of the 14;
_-1 to 14 _-o is the operation pulse generation circuit 13 _-1 to 13 _-o
This is an inverting circuit that inverts the signal from. The operation of this simultaneous injection prevention circuit 5 is as follows. When pushbutton switch P ₁ is pressed, the signal enters operation detection circuit 11 _-1 and a pulse output is output, which then goes to logic circuit 1.
Enter _2-1 . while the other pushbutton switch P ₂ ~ _{P o}
Since there is no signal from the negative circuits 14 _-2 to 14 _-o , there is an output "1", which is the logic circuit 12 _-1 described above.
Therefore, it is output from the logic circuit and enters the operation pulse generation circuit 13 _-1 . The operation pulse generating circuit _13-1 outputs a pulse with a predetermined width and enters the encoding circuit 4, and the receiving section ₂₁ is operated by a command from the transmitting section 1. However, even if the pushbutton switch _P2 is pressed and closed while the pushbutton switch _P1 is closed, the output from the operation detection circuit _11-2 is input to the logic circuit 12-2, but the output from the negation circuit _14-1 is input to the logic circuit _12-2 . The output will be a “0” signal (this is the push button switch P ₁
The output from the operation pulse generation circuit enters the inverting circuit _14-1 due to the closing of , so the output of the inverting circuit _14-1 becomes "0"), so the output of the logic circuit _12-2 becomes a "0" signal and the push button is pressed. Switch _P2 signal is not accepted. After a certain period of time (pulse width time of operation pulse generation circuit 13 _-1 ), the output of negation circuit 14 _-1 changes from "0" to "1", but at that time, even if push button switch P ₂ is kept pressed, operation is not possible. Since the output of the detection circuit _11-1 changes from " ₁ " to "0", the signal of the push-button switch P 2 will remain unchanged unless the push-button switch P ₂ is opened and closed again without input to the logic circuit _12-1 . Not accepted. This prevents simultaneous closing even if a plurality of push button switches P ₂ to _{P o} are closed at the time when the operation by push button switch P ₁ is completed. Next, when the operating switch is a non-automatic return switch such as a toggle switch and transmits a continuous signal, the simultaneous closing prevention circuit is as shown in FIG. That is, 11 _-a to 1 _oa are operation detection circuits that output a pulse signal only when the toggle switches S ₁ to S _o are closed, and 11 _-b to 1 _ob are negative only when the toggle switches S ₁ to _{S o} are opened. Circuits 51-5n
operation detection circuits that issue pulse signals in response to signals sent through 21 _-a to 2 _oa and 21 _-b to 2 _ob;
is a logic circuit, 31 to 3 _o is a flip-flop circuit,
_41-4o are control circuits in which an operation pulse generation circuit is combined with an operation detection circuit for detecting rising and falling edges, and _51-5o and _61-6o are inverting circuits for inverting signals. The operation of this simultaneous injection prevention circuit 5 is as follows. Toggle switch S ₂
When the toggle switch _S1 is closed when _S0 is open, the flip-flop circuit 31 is set via the operation detection circuit 11 _-a and the logic circuit 21 _-a . The rise of the set signal from the flip-flop circuit 31 is detected in the control circuit 41, and a signal with a predetermined pulse width is output. The signal enters the encoding circuit 4, and a command from the transmitter 1 causes the receiver ₂₁ to close. When the toggle switch _S1 is opened in this state, the output of the NOT circuit 51 becomes "1" and the flip-flop circuit 31 is reset via the operation detection circuit 11 _-b and the logic circuit 21 _-b . The fall of the reset signal from the flip-flop circuit 31 is detected in the control circuit 41, and a signal with a predetermined pulse width is output. The signal enters the encoding circuit 4, and a command from the transmitting section 1 causes the receiving section ₂₁ to open. For example _, if toggle switch _S2 is closed while toggle switch S1 is closed and receiving section ₂₁ is closed, the signal is blocked by logic circuit 22 _-a (this is because toggle switch S2 is closed). ₁ is closed, the signal from the control circuit 41 is inverted by the NOT circuit 61, becomes a "0" signal, and is input to the logic circuit _22a ). Furthermore, even if the closing operation of the receiving section ₂₁ is completed while the toggle switch _S2 remains closed, the output of the operation detection circuit 12 _-a has already changed from "1" to "0". If there is no input to the logic circuit 22 _-a and the toggle switch _S2 is once opened and then closed again, the signal from the toggle switch _S2 cannot be received. Receiving section 2 ₁
After the closing operation is completed (at this time, toggle switch _S1 is in the closed state), close toggle switch _S2 ,
Even if the toggle switch _S1 is opened when the receiving section ₂₂ is open, the signal is blocked by the logic circuit 21 _- b and the receiving section ₂₁ is not opened, and after the closing operation of the receiving section ₂₂ is completed, the toggle switch S1 is turned off. ₁ (at this time, the receiving section 2 ₁ is closed, so there is no problem), and then opening it again, the receiving section 2 ₁ can be operated to close. In this way, whether the operation input signal to the opening/closing control device is a pulse signal (automatic return switch such as a push button switch) or a continuous signal (non-automatic return switch such as a toggle switch), erroneous selection due to simultaneous closing operations is prevented. be able to. By adding the above-mentioned simultaneous closing prevention circuit to the transmitter of the opening/closing control device, it is possible to reliably prevent the mistaken selection of opening/closing operations of the controlled object due to simultaneous operation commands that tend to occur during high-frequency operations or operations by multiple operators. be able to.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram of a conventional opening/closing control device, Fig. 2 is a circuit diagram of an opening/closing control device which is an embodiment of the present invention, and Fig. 3 is a simultaneous closing prevention circuit in Fig. 2 in which the operation input is a pulse signal. FIG. 4 is a circuit diagram applied when the simultaneous input prevention circuit shown in FIG. 2 is used when the operation input is a continuous signal. 4: Encoding circuit, 5: Simultaneous input prevention circuit, 11
_-1 ~ 11 _-o , 11 _-a ~ 1 _oa , 11 _-b ~ 1 _ob : operation detection circuit, 12 _-1 ~ 12 _-o , 21- _a ~ 2 _oa ,
21 _-b ~ 2n- _b ; logic circuit, 13 _-1 ~ 13 _-o :
Operation pulse generation circuit, 14 _-1 to 14 _-o , 51 to 5
_o , 61 to 6 _o : inversion circuit, 31 to 3 _o : flip-flop circuit, 41 to 4 _o : control circuit, C ₁ to _{C 7} ,
P ₁ ~ _{P o} , S ₁ ~ _{S o} : Operation switch (P ₁ ~ _{P o} : push button switch, S ₁ ~ _{S o} : toggle switch).

Claims (1)

[Claims] 1. An operation signal from an operation switch provided for each controlled object to be opened/closed is converted into a parallel address code set for each controlled object by an encoding circuit, and the converted address code is converted into a parallel address code set for each controlled object. The signals are sent in parallel to the controlled object side via multiple lines, and the controlled object side accepts the signals through a logic circuit that accepts only address code signals that match the set address code, and then operates the operating switch. In an opening/closing control device in which a specified controlled object is opened/closed; at least during the period after the operation signal is issued from the operating switch until the opening/closing operation of the controlled object specified by the operating switch is completed. The opening/closing control device is characterized in that a simultaneous operation prevention circuit is provided between the operation switch and the encoding circuit to invalidate operation signals issued from other operation switches. 2. In the opening/closing control device according to claim 1, the operation switch is an automatic return switch, and the simultaneous operation prevention circuit includes an operation detection circuit that detects that the operation switch is operated and generates a pulse output; Each operating switch is provided with a logic circuit that accepts an output as one input, and an operating pulse generation circuit that receives the output from the logic circuit, generates an operating pulse of a predetermined time width, and sends the generated operating pulse to the encoding circuit;
A signal related to the output state of the operation pulse generation circuit corresponding to another operation switch is input to the other input of the logic circuit, and a pulse output is generated from the operation pulse generation circuit corresponding to the other operation switch. An opening/closing control device characterized in that an output is generated from the logic circuit on the condition that the logic circuit is not in use. 3. In the opening/closing control device according to claim 1; the operation switch is a non-automatic return switch; the simultaneous operation prevention circuit includes an operation detection circuit that generates a pulse output each time the operation switch is operated and a return operation; a logic circuit that receives an output; a flip-flop circuit whose output state changes each time it receives an output from the logic circuit; Each operating switch is provided with an operating pulse generating circuit to be sent to the encoding circuit; the logic circuit corresponding to one operating switch receives a signal related to the output state of the operating pulse generating circuit corresponding to the other operating switch. An opening/closing control device characterized in that an output is generated from the logic circuit on the condition that a pulse output is not generated from an operation pulse generation circuit corresponding to the other operation switch.