JPS59202743A - Transmitting and receiving device - Google Patents

Abstract

PURPOSE:To simplify the configuration of a circuit and to apply a titled device to a home electric appliance by using in common a carrier signal for superposing an information signal, and a clock signal to a transmitting and receiving digital logical circuit for managing the transmission and reception of a signal. CONSTITUTION:In a power source supply side transmitting and receiving device 1, a signal superposing and separating circuit 10 executes a superposition and a separation of a power source VB and an information signal. It is executed by setting a capacity of a capacitor 8, and an equivalent inductance seen from the secondary winding side of a transformer 6 to a suitable value. A base band signal (DATA) of an information signal outputted from a transmitting and receiving digital logical circuit 14, and a carrier signal (CARRIER) outputted from an oscillating circuit 13 are inputted to a modulating circuit 11, and the signals are modulated to drive the transformer 6 of the signal supperposing and separating circuit 10 and to superpose the information signal on a transmission line. On the contrary, the information signal transmitted from other transmitting and receiving device through transmission lines 5a, 5b is separated and detected from a power source component by the signal superposing and separating circuit 10 to be inputted to a demodulating circuit 12. A rectangular pulse outputted from the oscillating circuit 13 is provided as a carrier signal to the modulating circuit 11, and also inputted as the clock signal of the transmitting and receiving digital logical circuit 14.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a transmitting/receiving device that can be applied to a remote control system for remotely controlling gas water heaters, 20,000 oil boilers, etc. The present invention relates to a transmitting/receiving device suitable for being mounted on a power supply line for transmission.

Conventional configuration and its problems Conventionally, when remotely controlling a gas water heater, 20,000 oil boiler, etc., a dedicated signal line was extended from the equipment itself, and a switch and one display lamp were installed at the end of the signal line. is the most rudimentary, and many products have been commercialized. However, such a configuration has the drawback that the number of signal lines increases, making wiring work complicated. In particular, when connecting multiple remote controllers to perform remote control from various locations, the signal line extension method described above cannot be used.

Therefore, we came up with a remote control method that incorporates digital signal transmission technology and wired communication technology, makes the information signal to be transmitted correspond to digital bits, and supplies power and transmits the information signal over a pair of transmission lines. It will be done.

However, in order to incorporate and commercialize such digital signal transmission technology and wired communication technology into remote control systems for household electric appliances such as gas water heaters and oil boilers, there have traditionally been problems in terms of cost. There was a problem.

In other words, it is no exaggeration to say that it depends on whether the equipment/function can be realized at the lowest possible cost.

These requirements include, of course, that direct materials must be cheap, all parts must be housed in a small remote control case, and they must also be easy to inspect and manage during mass production. It also includes the fact that the cost for doing so is low.

Purpose of the Invention The present invention seeks to solve cost problems when applying digital signal transmission and wired communication technology as described above to products in the field of consumer electronics such as household electrical equipment. To provide a transmitting/receiving device that has a simple circuit configuration, reduces costs, and requires less inspection and management time during mass production, and is intended to be applied to electric equipment such as gas water heaters and oil boilers. The purpose is to

Structure of the Invention The present invention uses a pair of transmission lines to modulate a signal superimposition/separation circuit for supplying power and transmitting information, and to modulate an information signal to be transmitted to another transmitting/receiving device, and transmitting the signal in a narrow band. a demodulation circuit for demodulating modulated information signals received from other transmitting/receiving devices, and a transmitting/receiving digital circuit for managing the transmission and reception of the input/output information signals in accordance with pre-agreed communication rules. It is modulated by a logic circuit and an oscillation circuit that provides a clock signal to the transmitting/receiving digital logic circuit and a carrier signal to the modulation circuit. The configuration is shared by both.

Description of examples An embodiment of the present invention is shown in FIGS. 1(a) and 1(b).

Figure 1(a) shows a transmitting/receiving device that carries a power supply source and supplies power to other transmitting/receiving devices by connecting a 100VK to the ``Yakugenpachi'' for nm, and Figure 1(b) ) is conversely l
This figure shows a transmitting/receiving device receiving an E source.

In FIG. 1(a), 1 indicates the entire configuration of the transmitter/receiver on the power supply side, which connects C to the commercial power source via terminals 2a and 2b.
Connected to 100■. 3 has 'junior circuit engineering', Ac
10OV input is required for electronic circuit operation →-12
- source VB Kf for converting to DC voltage such as V, +5V, etc., and transmitting it to the transmitting/receiving device on the power supply side.
It is something to be admired.

The terminals 4a and 4b are for connecting the transmission lines sa and 5b to supply power to other transmitting/receiving devices and for transmitting and receiving information signals, and are connected to both ends of the power supply VB via the signal superimposition/separation circuit 10-. 7a and 7b.

In the signal superimposition/separation circuit 1o, a capacitor 8 is connected in parallel to the power supply VB, and a secondary winding 6 of a transformer 6 is connected in series to the power supply VB.
b is connected, and superimposition and separation of the power supply B and the information signal is performed.

That is, by setting the capacitor 8's capacitance ff1C + the equivalent inductance L seen from the secondary winding side of the transformer 6 to appropriate values, the respective impedances Z c and Z L with respect to the frequency f have the characteristics as shown in Fig. 2. It can be done. Now, if the frequency of the power supply VB is 11 and the frequency of the information signal is 12, then at the frequency a fl,
Zc〉〉ZL1 frequency e f 2, ZL〉〉Z
c, and on both sides of capacitor 8, the power supply VB
The power supply VB and the information signal are separated by the well-acclaimed electric circuit principle that only the information signal component appears at both ends of the secondary winding 6b of the transformer 6. . Note that the frequency f2 becomes a carrier frequency.

Tuning capacitors 9 are provided at both ends of the primary winding 6a of the transformer 6 to impart frequency selectivity to the transmission and reception of information signals. Further, a variable UA9 circuit 11 and a guard circuit 12 are connected.

The modulation circuit 11 receives the baseband signal (DATA) of the information signal outputted from the output terminal (OUT) of the transmitting/receiving digital logic circuit 14 and the carrier signal (CARRIER) outputted from the oscillation circuit 13.
^1, the transformer 6 of the signal superimposition/separation circuit 10 is driven, and the information signal is placed on the transmission line.

Conversely, information signals transmitted from other transmitting/receiving devices via transmission lines sa and sb are separated and detected as 4k components by a signal superimposition/separation circuit 10 and then input to a demodulation circuit 12. The information signal restored to the original baseband signal by the demodulation circuit 12 is input manually from the input terminal (I N ) of the input/transmit/receive digital logic circuit 14 and processed.

The transmitting/receiving digital logic circuit 14 manages the transmission and reception of information signals in accordance with the pre-agreed communication rules to be described later, as well as the input/output circuit 15 which is made up of LEDs, keys, switches, relays, volumes, sensors, etc. It exchanges input/output information with the . This input/output information is mutually borrowed between other far away transmitting/receiving devices via the transmitting/receiving digital logic circuit 14.

Moreover, the rectangular pulse output from the oscillation circuit 13 mentioned above is
In addition to being given as a carrier signal to the modulation circuit 11, it is also input as a clock signal to the transmitting/receiving digital logic circuit 14. Note that it is preferable to use a microcomputer for the transmitting/receiving digital logic circuit 14.

Next, in FIG. 1(b), 16 is the power supply IIj1]
The overall configuration of the transmitter/receiver is shown below. Transmission lines 5a, 5b are connected to the terminals 17a, 1Yb, and receive transmitted power and input/output information signals. The power source and information signal separation means are as explained in Fig. 1(a),
The power supply VB appearing at both ends of the capacitor 8 is connected to the power supply circuit H1.
8, the DC voltage is converted into a stabilized DC voltage of, for example, -12V, +sV, and the entire transmitting/receiving device 16 of the power supply f141 is operated.

Regarding the circuit block of 1゛1L (see Section 11.1(a)
), so it will be omitted here.

Note that the same-at number is used for the same-promotion block.

Next, FIG. 3 shows another practical example in which a microcomputer 14a having a built-in clock oscillation circuit 19 is used as the transmitting/receiving digital logic circuit 14.

General (7C) The clock oscillation circuit 19 is composed of an inverter element 198'''c, and its power and output are connected to the terminal 20a of the microcomputer 14a.

20b. Through terminals 1 and 9, these terminals are 20
a.

20 b i/(: For example, to connect an oscillating element 21 such as a crystal, a ceramic emitting atom or condenser, or a resistor (l) to cause oscillation.

In the figure, 22 is an impedance conversion circuit composed of an Eminotanoro circuit, etc., which buffer-links the output signal of the oscillation circuit 19 outputted from the terminal 20b to create a carrier signal (CARRIER), which is output to the modulation circuit 11. It is something to do.

FIG. 4 shows an example of a signal packet structure of an information signal to be transmitted and received, and FIG. 5 shows an example of a unit code forming information No. 4-F5.

In FIG. 4, at the beginning of the signal packet, a 2-bit length g1 code 23 is provided, and a special bit pattern as shown in FIG. 5(C) is assigned. During this time, the bit pattern of the J■ code is as follows, where T is the 1-bit length, and /2 T1 theory J, jlj
"O" consists of /2T and is a pattern that never appears in the following fields of test nation address 24, data 25, and error f edge 26. In other words, from destination address 24 onwards, double reference codes whose logic is inverted at -T as shown in Figures 5(a) and (b) are used, and in these combinations, the synchronization code described above is Never take a hint pattern.

Information signals having such a unit code and signal packet configuration are inputted and outputted in a hint serial manner by the transmitting/receiving digital logic circuit 14, and Vf*U transmission between each transmitting/receiving device is performed.

As is clear from the above explanation, the frequency variation of the clock signal that constitutes the unit code, that is, the 1-bit length "f" of the signal, and serves as the reference time for determination, affects the reliability of transmission and reception. is clear.

Generally, the signal superimposition and separation circuit 10 for outputting information signals between the transmission line and the transmission line has good frequency selectivity in order to transmit information signals in a narrow band. I like the property of only letting it pass. Therefore,
The frequency accuracy of the carrier signal for modulating the information signal also affects the reliability of transmission and reception, and is an item that needs to be managed in case of inheritance.

Effects of the Invention As is clear from the detailed explanation above, the present invention provides a carrier signal for superimposing an information signal on a power supply line, and management of signal transmission and reception in accordance with a pre-agreed communication protocol. This configuration shares the clock signal to the transmitting and receiving digital logic circuits for the purpose of transmitting and receiving data, and has the following effects.

First, since it is only necessary to manage the oscillation frequency of one oscillation circuit, inspection and adjustment can be carried out in a very tMJ manner, and the cost required for this can be reduced.

■ Since the number of parts is reduced, it is obvious that the cost of direct materials will be reduced, and the case of the remote control can be made smaller.

[Brief explanation of the drawing]

Figures 1 (a) and (b) are circuit configuration diagrams of a transmitting/receiving device showing an embodiment of the present invention. power supply side) 5a,
sb...Transmission line, 10...Signal superposition/separation circuit, 11...Modulation circuit, 12...Demodulation circuit, 13...Oscillation circuit , 14...
Transmitting/receiving digital logic circuit, 16... Transmitting/receiving device (power receiving side).

Claims (3)

[Claims] (1) A pair of transmission lines for transmitting information signals superimposed on a power supply, a signal superimposition/separation circuit for inputting/outputting information signals between the transmission lines, and a power supply for transmitting information signals. and a demodulation circuit for demodulating the modulated information signal inputted from the signal superposition/separation circuit. a clock-synchronous transmitting/receiving digital logic circuit for transmitting and receiving information signals between the modulating circuit and the demodulating circuit in accordance with a pre-agreed communication protocol; a carrier signal input to the modulating circuit; A transmitting/receiving device comprising an oscillation circuit for outputting a clock signal input to the transmitting/receiving digital logic circuit. (2) The transmitting/receiving device according to claim 1, which uses a microcomputer as the transmitting/receiving digital logic circuit. (3) The transmitting/receiving device according to claim 2, which uses a microcomputer that includes a clock oscillation circuit, and supplies rectangular wave pulses emitted from the microcomputer itself to the modulation circuit as a carrier signal. .