KR900006431Y1 - Remote control system by highfrequency signals - Google Patents

Abstract

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Description

Remote control device using high frequency signal

1 is a circuit diagram of the transmitter side in the present invention.

2 is a circuit diagram of the receiver side in the present invention.

(A) of FIG. 3 is a digital signal waveform diagram which is shown in connection point A and (D) in FIG. 1 and FIG. 2, (b) is connection point (B) and (in FIG. 1 and FIG. Signal waveform diagram shown in C).

* Explanation of symbols for main parts of the drawings

10: power supply unit 20: digital signal generation unit

30: oscillator 40: modulator

50: high frequency oscillation unit 60: intermediate frequency amplification and transmission unit

70: high frequency amplifier 80: local oscillator

90: frequency conversion unit 100: filter unit

110: integrated circuit for high frequency reception 120: inverting circuit

130: digital signal discrimination unit 140: flip-flop circuit

150: drive output portion Q _{1 to} Q ₈ : transistor

FET: Field Effect Transistor IC ₁ : Encoder IC

IC ₂ : Integrated Circuit IC for High Frequency Reception IC ₃ : Tow Decoder IC

IC ₄ : Decoder IC X-TAL ₁ ~ X-TAL ₃ : Crystal Oscillator

CF _{1 to} CF ₂ : Ceramic filter F / F: Flip-Flop

Ry: Relay I ₁ Inverter

Con: Converter VD: Variable Capacitance Diode

D ₁ : light emitting diode D ₂ -D ₆ : diode

VR ₁ -VR ₂ : Variable resistor R ₁ -R ₁₃ : Resistance

C ₁ -C ₅ : Condenser L ₁ -L ₄ : Choke Coil

IFT ₁ -IFT ₄ : Intermediate frequency transformer OSC: Oscillating coil

ANT ₁ , ANT ₂ : Antenna KB: Keyboard Switch

SD ₁ , SD ₂ : DIP switch group

SD ₃ : Switch group corresponding to keyboard switch (KB)

S ₀ : power switch

S ₁ , S ₂ , S ₃ , S ₄ , S ₅ : Switch built in DIP switch group (SD ₁ , SD ₂ )

S ₆ , S ₇ , S ₈ , S ₉ : Switch built in switch group (SD ₃ )

S _RY : Relay contact

The present invention relates to a remote control device that can automatically control the power of various electrical equipment at a long distance, off.

In the related art, a remote control device using an optical signal has been proposed as a remote control circuit of this kind, but it transmits an optical signal according to a light emitting state of a light emitting element connected to a transmitter and receives the signal transmitted from the light receiver of the receiver. The on / off control of the power supply of the electric device connected thereto is performed. When an obstacle such as an object or a wall exists between the transmitter and the receiver, the optical signal transmitted from the transmitter cannot be transmitted to the receiver. As the range of remote control can be limited to a space free of obstacles, the practicality is reduced, and the limitation of use is that the transmitter and receiver operate only at the same angle as the line.

In addition, the remote control device using the radio has been designed to compensate for this drawback, since the transmission and reception signals are a single one, there is a problem that the malfunction occurs due to interference between the giga mutual communication when using the same type of remote control device at a short distance. .

The present invention can effectively control the remote control operation without any obstacles and remote transmission / reception angles in view of the above drawbacks, and can control only the electric equipment connected to a certain receiver by encrypting the transmission signal with a combination of switches. In order to improve the reliability as well as to prevent malfunction due to interference, it will be described in detail by the accompanying drawings as follows.

In FIG. 1, an encoder IC (IC ₁ ), a keyboard switch (KB), a dip switch group (SD ₁ ), a light emitting diode (D ₁ ), a diode (D ₂ ), (D ₃ ), and a resistor are connected to the power supply unit 10. (R _{1 to} R ₃ ) and a resistor (R ₄ ) and an encoder IC (IC ₁ ) connected to the digital signal generator 20 connected by the capacitor C ₁ and connected to one side of the dip switch group SD ₁ . A known oscillator 30, a modulator 40, a high frequency oscillator 50, an intermediate frequency amplification and transmitter 60 are connected to each other via a diode D ₃ connected to the output side of the circuit). As shown in the figure, a resistor (R ₅ ) is applied to a known high frequency receiving circuit composed of a high frequency amplifier 70, a local oscillator 80, a frequency converter 9, a filter 100, and an integrated circuit for high frequency reception 110. , R ₆ ) and an inverting circuit 120 connected with a transistor Q ₇ , and through the resistor R ₇ , a decoder IC (IC ₄ ), a dip switch group (SD ₂ ), (SD ₃ ), Open with diode (D ₄ ), resistor (R ₈ -R ₁₀ ), capacitor (C ₂ -C ₄ ) The connected digital signal discriminating unit 130 is connected to the converter (Con), flip-flop (F / F), resistors (R ₁₁ to R ₁₃ ), diodes (D ₅ ), inverters (I ₁ ), and capacitors ( C ₅ ) connects the flip-flop circuit unit 140 connected to the transistor Q ₈ , the diode D ₆ , and the driving output unit 150 connected to the relay Ry to form a receiver.

Unexplained code Vcc is a power supply terminal, the rest of the unexplained code is described in the description of the code for the main part of the figure.

Referring to the effects of the present invention configured as described above are as follows.

In FIG. ₁ , a keyboard switch KB for inputting a combined signal connected to a dip switch group SD ₁ in which n switches are combined in parallel and an N encoder IC IC ₁ is input. It is used as a switch for the encoder. The number of input terminals of the encoder IC (IC ₁ ) is T, the number of switches built in the dip switch group (SD ₁ ) is n, and the encoders can be connected to each keyboard switch (KB). When the number of input terminals of the order IC (IC ₁ ) is N, N = Tn, and assuming that the number of signals combined by the keyboard switch KB is Z, Z = 2 ^e -1 (-is the power switch). (S ₀ ) is turned on and the keyboard switch (KB) is not pressed as a natural combination signal (0000…) state). For example, five switches are provided for an encoder IC having nine input terminals. In case of connecting the built-in DIP switch group (SD ₁ ), the 15 combined signals can be converted to encoder IC (IC ₁ ), any number of switches in the dip switch group SD ₁ connected to the encoder IC (IC ₁ ) can be combined by the user on or off and the power switch (S ₀ ) is turned on. In the state (light emitting diode D ₁ is on), press the designated number of the receiver connected to the electric equipment to be remotely controlled as the keyboard switch KB and the combination of the dip switch group SD ₁ and the keyboard switch KB ) (E.g. 1 = A (1000), 2 = B (0100), 3 = C (0010), 4 = D (0001), 5 = AB (1100), 6 = AC (1010), 7 = AD (1001), 8 = BC (0110), 9 = BD (0101), 10 = CD (0011), 11 = ABC (1110), 12 = ABD (1101), 13 = ACD (1011), 14 = BCD (0111), 15 = combined with ABCD (1111) is input to the encoder IC (IC ₁ ) operating in the low active, so that the digital signal in the low state by the binary method is condenser (C ₁ ) and a resistor (R ₃₎ is coded (coding) encoded in the order IC (IC ₁₎ and a period of the time constant according to the encoding order IC (IC ₁₎ It is displayed on the output terminal (A).

At this time, the low-level digital signal appearing at the output terminal A is applied to the oscillator 30 through the diode D ₃ of the reverse connection. The variable resistor VR ₁ of the oscillator 30 corrects the distortion of the digital signal. By doing so, an accurate square wave digital signal is obtained, and the digital signal at this time is mixed with the oscillation signal so that the signal to be transmitted appears at its connection point (B).

In this way, the signal appearing at the connection point B is modulated by the modulator 40, and then mixed with a stable high frequency signal of a constant frequency by the crystal oscillation element X-TAL ₁ of the high plate oscillator 50 to amplify the intermediate frequency. And amplified by the transmitter 60 appropriately and then transmitted through the transmit antenna ANT ₁ .

In such a state, the receiving antenna ANT ₂ shown in FIG. 2 receives the signal transmitted from the transmitter and amplifies the weak high frequency signal in the high frequency amplifier 70 to be applied to the frequency change unit 90.

At this time, in the frequency converter 90, another high frequency signal generated from the local oscillator 80 is mixed and an FM intermediate frequency of 10.7MHZ is made through the ceramic filter CF ₁ of the filter unit 100. high-frequency receiving integrated circuit IC, so is the (IC ₂₎ standing so perform the intermediate frequency amplifier and detection standing output terminal (C) of the high-frequency reception integrated circuit IC (IC ₂₎ of the credit the integrated circuit 110, the first Fig. The same signal waveform as the signal appearing at the connection point B of the oscillation section 30 is shown, and this signal is passed through the tondecoder IC (IC ₃ ), so that the connection point D at its output side is the encoder IC of FIG. The same digital signal as the signal appearing at the output terminal A of (IC ₁ ) appears, and this low signal is inverted through the resistor R ₅ and the transistor Q ₇ , that is, to the connection point A of FIG. 1. High signal with inverted digital signal appearing Is applied to the decoder IC (IC ₄ ).

At this time, the decoder IC IC ₄ is connected to the encoder IC IC _{1 of the} transmitter of FIG. 1 by a combination of the switch group SD ₃ corresponding to the dip switch group SD ₂ and the keyboard switch KB. The dip switch group SD ₂ corresponds to the combination of the dip switch group SD ₁ because the corresponding signal is outputted when compared with the combination of the dip switch group SD ₁ and the keyboard switch KB. Signal is received, the switch group SD ₃ receives a signal corresponding to the selected combination of the keyboard switch KB, and the decoder IC IC ₄ outputs a signal to trigger the pull-flop F / F. As the output Q changes to a high or low state, the transistor Q ₈ connected thereto changes to a conductive or non-conductive state, thereby controlling the relay Ry connected to the collector side of the transistor Q ₈ . on, its contact point (S _RY) is on, according to the former off state of the various kinds of the electrical equipment connected thereto To be able to control that.

The present invention operated as described above is a signal output by operating the decoder IC when the combination of the keyboard switch of the transmitter and the combination of the corresponding switch of the receiver coincides with each other in a combination of the dipswitch groups. By controlling the operation of the relay, it is possible to control the power supply of various electric devices, thereby preventing malfunction due to interference of conventional devices, and in the case of using multiple receivers, different combinations of dip switch groups connected to each receiver are used. By controlling only the electrical equipment connected to a certain receiver, it is possible to provide a very convenient effect that can be used for home use as well as remote control of home appliances.

Claims (1)

A transmitter for transmitting the digital signal output from the digital signal generator 20 through the oscillator 30, the modulator 40, the high frequency oscillator 50, and the intermediate frequency amplification and transmitter 60, and the transmission output from the transmitter. High frequency amplification unit 70, local oscillator 80, frequency converter 90 and filter unit 70, local oscillator 80, frequency converter 90 and filter unit 100 and the high frequency signal In the remote control device for transmitting and receiving using a high frequency signal configured to receive in a high frequency receiving circuit connected to the integrated circuit 110, the digital signal generating unit 20 of the encoder IC (IC ₁ ) A keyboard switch (KB) for inputting a combined signal to an input terminal and a dip switch group (SD ₁ ) in which n switches are connected in parallel are connected to each other, and the resistors (R ₅ ), ( R _6), and a transistor (Q _7), inverter circuit 120 is connected, and the Consisting of the output side has a decode order IC (IC ₄₎ connected to the switch group (SD ₃₎ the input terminal corresponding to the dip switch group (SD ₂₎ and the keyboard Eau switch (KB) of the parallel connection to the last 120 The digital signal discriminating unit 130 is connected, and the flip-flop circuit 140 formed by connecting the flip-flop F / F is connected to the output side of the digital signal discriminating unit 130 through the converter Con. Dip in the digital signal generator 20 of the transmitter is formed by connecting the drive output unit 150 composed of transistor Q ₈ having a relay Ry connected to the collector to the output side of the flip-flop circuit unit 140. Remote control device using a high frequency signal, characterized in that configured to operate when the combination signal of the position group (SD ₁ ) and the keyboard switch (KB) match the corresponding signal of the digital signal determination unit 130 of the receiver.