JPS58187096A - Transmission system of control signal - Google Patents

Abstract

PURPOSE:To decrease the number of transmission line, by switching a ground line in response to an object to be controlled, in transmitting a control signal to two objects to be controlled at the same location apart from a control station. CONSTITUTION:The control station is provided with two AND circuits 8, 9 and control signals A, B are inputted to respective input terminals. The objects 3, 4 to be controlled provided at a remote location are connected to the control station with two transmission lines 10, 11. The lines 10, 11 go to the ground potential when the AND circuits 8, 9 are set off. Thus, when the AND circuits 8, 9 are set on and off respectively, the line 11 becomes the ground line, and the control signal A is transmitted to a light emitting element 3 via the line 10, a light emitting element 3 and the ground line 11. Similarly, when the AND circuits 8, 9 are set off and on respectively, since the transmission line 10 becomes the ground line, the control signal B is transmitted to the light emitting element 4.

Description

[Detailed Description of the Invention] tal Technical Field of the Invention The present invention connects two objects to be controlled located in the same field far from a control station using l vs. The 7th and 1st stations transmit all control signals from the control station.
5j with all your strength! Control that can be achieved! l(] Concerning the signal transmission formula.

fbl Prior Art and Problems FIG. 1 is a block diagram of a circuit of a conventional control signal transmission system.

In the figure, 1 and 2 are gate circuits, 3 and 4 are light emitting elements, and 5 and 7
Fi line, 6-wire earth return wire, 几,, 几.

is a resistance, and +v+ + + V t is a DC power supply.

Figure 1) The light emitting elements 3.4 are located at the same location and each indicates a controlled object that requires an earth return line.Each earth return a commonly uses the earth 1j dart 6, tR to the light emitting element 3 is a positive DC power supply +
■ From 1, it passes through the entire ground return line 6 through the resistor Rtll path 5 and flows to the ground.
The current flows from the positive DC power supply +■, through the resistor 16 line 7, and through the earth return edge 6 to the ground, and the output side of the gate circuit 1,203 in the control station receives the control signal. When there is no light emitting element (0"), it becomes γ-closed, and when the control signal becomes 1#, it becomes open. Therefore, when you want to light up 6 light emitting elements, 3.4 light emitting elements are controlled. Signals A, By (l'' can be set to 1, or if you want to turn off the light, set it to 0.) In this way, using three wires, control inertia from the control station can be obtained from the control station. Light emitting element 3.4 (object to be controlled) , malfunction prevention U
) In order to prevent the controlled object υ) from being grounded at a certain point, the entire ground return line is used, and then it is grounded at the control station.

However, the method described above has the disadvantage of requiring three lines.U) In order to eliminate the defect a, there is also a method that uses all of a pair of lines and multiplexes the sideways signals A and Bi. ), a multiplexing device is required for the control station l1l), and a demultiplexing device is required on the side of the controlled object, which has the disadvantage of requiring a complicated circuit.

(cl Invention (/J Purpose) The purpose of the present invention is to meet the above requirements and to
] When a control station sends a control t1 signal to 62 controlled objects that are in the same location and require earth return ligation,
The object of the present invention is to provide a control signal transmission system that can be realized with a simple circuit using a pair of a[18].

tdl Structure of the Invention In order to achieve the above-mentioned object, the first (1) controlled object is a ground return line for a pair of lines, and the second controlled object is In addition to the pair of lines, connect them to form a perfect ground return line, and when sending a signal tube from the control station to the first controlled object, connect the pair of lines to a 10,000-ton ground, and connect the second line to the ground. When sending a signal to an object to be controlled, the pair of lines and the like must be completely grounded.

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

FIG. 2 shows a block diagram of a circuit for a control signal transmission system according to an embodiment of the present invention. In the figure, the same functions as those in FIG. , l(1, 11 indicate the line.

The AND circuit 8.9 is grounded when there is no output (when it is 10'') and is open when there is an output (when it is 11'). Therefore, the control signal ACD "l" 1 light emitting element 3 If the output of the AND circuit 9Cb is grounded, the output of the AND circuit 9Cb is grounded, and the current is a positive DC source, the resistance ratio is 101ka, and the light emitting element 3 (object to be controlled) is all Is it track 11? ] There are 6 flows at the end of the corner, so the IIj path 11 becomes the earth return line, and it is possible to send a 1-bit signal tube. Also, if you want to send 9 of control@signal H to all 1# light emitting elements 4 (objects to be controlled), use the gate ill.
If the total number of bucket signals is 11, the output of the lower circuit 8 (V1, --
1 is the positive through-flow power supply +V, the resistor is 1 t, the circuit 11 is connected 9 times, and the 9th line 4 t'lk passes through the line 10 and flows to ground. ) The track 10 becomes the earth return line and can send a signal of -1".Of course, if the control signals A and B are 0", no current flows through the light emitting elements 3.4, so it is recognized. I can do it.

By doing this (one light from the control station), it is possible to send the control signal B to the light emitting elements 3 and 4 (object to be controlled) using the 1w path.

Is diagram 8g3 a control signal in an embodiment of the present invention? Transmit to others 1
FIG. 3 is a circuit cuff block diagram when it is desired to insulate the control object from the side or from the controlled object tstW& side.

In the figure, the same functions as those in Figure 2 are indicated by the same symbols.

Reference numerals 12 and 13 are photocups located on the side of the object to be controlled; 15 and 17 are emitters and z elements; and 16 and 18 are light receiving elements.

The difference between Fig. 3 and Fig. 2 is that there is a photocoupler 12 on the input side of the two controlled objects. t3 is provided, and the control signal A sent in the same manner as in the case of Fig. 2 is "1".
In case c), the light emitting element 15 emits light, and the light emitting element 15 emits light through the light receiving element 16, which is a photoelectric conversion element.

When a current flows to the a' side and the control signal A is "O", no current flows. Also, if the sent control signal B is "B", the element 17 emits light, @S, or flows to the b and b' sides via the light receiving element IFI, which is a photoelectric conversion element, and the control signal B If the force s−o”z)l, no current will flow.

With this shift, the control signal A and control signal B can be received by the food coupler 12 and 13 and transmitted to others, and can be transmitted to the controlled object. Line 1 (If you want to insulate it from lines 1 and 11, you can also insulate it.

Figure @4 is a block diagram of a circuit when it is desired to send control signals A and BQ simultaneously in an embodiment of the present invention.

Components in the figure that have the same functions as those in FIG. 3 are indicated by the same symbols.

19 and 20 are low pass filters (hereinafter referred to as LPF) that remove frequency components of the gate control signal.

In the case of FIGS. 2 and 1 to 3, the control signal AC1)"B and the control signal B "B" cannot be sent at the same time, but FIG. 4 is an example in which the control signals A and 13t are sent simultaneously. If control signals A and Bo > clock period sufficiently earlier than the clock period of the pulse signal, the gate control signal is always set by 1°.
0". As a result, both control signals A and B become "l".
”, the control signals A, B and the gate control signal “
When the gate control signal is "l", the current due to "l" of the control signal B is positive [current power + t + resistance R].

11M11. Through i-optical element 17.1aWrlOt, 77
The gate control signal flows to the output r-s of the Y circuit 8, and the gate control signal is “
0", go to the control signal 〇) The current due to "1" is a positive DC power supply + ■ l + resistor f't+, II 'dlr lO
+ flows to the ground of the output of the AND circuit 9 via the light emitting element 15eIlk131 it-. The 1-bit signal that is turned on and off by these gate control signals is connected to the photocouplers 12 and 1.
The signal is sent from the output side of the LPF 19, 20, and the frequency components that are turned on and off by the gate control signal are removed. Therefore, the control signals A and B are sent simultaneously to the LPF 19 and 20. Even in the case of BI, control signals can be sent from the control station to the controlled object. Of course, when the control signals A and B are "O", the output of the AND circuit 8.9 is grounded, so no tilt force is output to the LPPs 19 and 20. For example, when the control signal AfJS is "1", the control signal B is
When is "0", the same principle as explained above is used, and the signal of "11" from the output side of LPF 19 is "1" than the output of LPF 20.
0" signal is output. Therefore, the 1st extension code A, +31
Can be transmitted simultaneously.

lfl Effects of the Invention As explained in detail above, according to the present invention, it is necessary to connect the ground 11 to the same location far from the control station.
Since it is possible to send control signals to one flIII controlled 8 trenches with a simple circuit using a control station and a pair of line sound, it is possible to eliminate approximately t-1 line or to use a complicated circuit. circuit? It has the effect of eliminating the need to use it65

[Brief explanation of the drawing]

Figure 1 is a diagram of a conventional control signal transmission circuit (/JPro), and Figure 2 is a circuit diagram of a control circuit according to an embodiment of the present invention. Figure 3 shows a control signal in an embodiment of the present invention?Circuit Q]F IJ in the case of a transmission line 6 or when it is desired to insulate the controlled object from the line side This is a block diagram of a circuit when it is desired to send control signals A and Bt simultaneously. In the figure, 1.2 is a gate circuit, 3, 4, 15.17 are light emitting elements, 5, 7, 10.11 are lines, 6 8.9 is the earth return line, 7-knot circuit, 8.9 is the AND circuit, t2.13 is the photocoupler, IJ18 is the light receiving element R, R, the resistor, +V, , +V is the positive OJ alternating current power supply, 19. 20 shows the low-frequency r wave generator 1. 57

Claims (1)

[Claims] When transmitting a control signal from the control station using one pair of lines for each of the first and second controlled objects located at the same location, and using one pair of lines as the ground return line, the first (/) controlled object connects the other of the pair of lines to the #l second controlled object so that it becomes an r-return line, and connects the second controlled object from the control station to the ground line. When sending a signal to the first controlled object, one of the pair of lines should be grounded, and when sending a signal to the second controlled object, the other routes of the pair should be fully grounded. Control No. 1 transmission method with 1* characteristics.