JPS6322120B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a receiver for a remote control device, and its purpose is to turn on an aircraft switch provided at a load even when there is no on control signal from a transmitter. Then turn on the receiver,
To supply power to a load, to operate even when the load is a capacitive load as well as a resistive load, and to prevent a glow lamp from turning on in the case of a fluorescent lamp load, etc. In particular,
Another objective is to ensure that power is supplied to the load by the fuselage switch, and another objective is to make the configuration simple and inexpensive.

FIG. 1 is a basic circuit diagram of the remote control device of the present invention, in which an ON or OFF control signal is transmitted from a transmitter 1 to a receiver 4 via a signal line 3 by operating operation switches 2a and 2b, and is then received. The device 4 drives the relay 5 according to the control signal to turn on or off the switching contact 6, thereby controlling the load 7 on or off. At this time, it is the control signal from the transmitter 1 that controls the load 7 on and off, and there is an inconvenience that the load 7 cannot be controlled without the transmitter 1 at hand. If you want to do so, you must go to the location where the transmitter 1 is installed or connect the AC power source 8 directly to the load 7 without going through the receiver 4.
The benefits of remote control are lost.

FIG. 2 is a specific circuit diagram of an example of the transmitter 1 shown in _FIG . Then, the voltage after rectification is connected to resistors R ₁ and R ₂
divide the voltage and input it to inverter gate _G1 . The output waveform-shaped by inverter gate _G1 is input to inverter gate _G2 , and is also output to a differentiating circuit consisting of capacitor _C2 and resistor _R4 , and the output of inverter gate _G4 is pulsed as shown in Figure 3b. P ₁ is obtained and similarly inverter gate G ₃
A pulse P ₂ is obtained at the output of . Note that FIG. 3a shows the voltage waveform of the AC power supply 8, and _Vth is the threshold level of the inverter gate _G1 . here,
Normally, operating switches 2a and 2b are closed, so the output of OR gate _G5 is at "L" level, but when operating switch 2a is pressed and turned off,
A pulse _P1 is obtained at the output of the OR gate _G5 , and a pulse _P2 is obtained when the operating switch 2b is pressed.
The output of the oscillation circuit 9 composed of a Colpitts circuit or the like is controlled by the transistor _Q1 .
A carrier output as shown in FIG. 3c is transmitted onto the signal line 3 only when the base of the transistor _Q1 is at the "H" level.

In such a remote control device, the receiver 4
has conventionally been configured as shown in FIG. Fourth
In the figure, 8 is an AC power supply, this AC power supply 8 is rectified by a rectifier bridge BD ₂ , and the voltage after rectification is
The voltage is divided by R ₈ and R ₉ and input to inverter gate G ₆ . The same pulses as inverter gates _G3 and _G4 in FIG. 2 are obtained at the outputs of inverter gates _G8 and _G9 . That is, the threshold level of inverter gate _G6 is set to
By matching the threshold level of G ₁ , a pulse P ₁ is obtained at the output of the inverter gate G ₉ and a pulse P ₂ is obtained at the output of the inverter gate G ₈ . 10 is a demodulation circuit which demodulates the control signal on the signal line 3, and the AND gate _G11 outputs a pulse _P1 when the operation switch 2a of the transmitter 1 is pressed, and when the operation switch 2b of the transmitter 1 is pressed. When this happens, a pulse _P2 is obtained at the output of the AND gate _G10 . 11 is a reset flip-flop (hereinafter abbreviated as R-SF.F.);
- When the set input S of SF.F.11 is at “H” level, that is, when the operation switch 2a is pressed, the output Q
becomes "H" level, transistor _Q2 is turned on and drives relay 5, switching contact 6 is turned on and power is supplied to load 7. On the contrary, R-SF.F.11
When the reset input R is at "H" level, that is, when the operation switch 2b is pressed, the output Q is at "L" level.
level and the switching contact 6 turns off. In this way, the receiver 4 can be turned on and off by operating the operating switches 2a and 2b of the transmitter 1. However, generally the receiver 4 is not integrated with the load 7,
Receiver 4 is interposed between AC power supply 8 and load 7 as an adapter. In this case, the transmitter 1 is indispensable when supplying power to the load 7, and there is a problem with operability as described above, so it is desirable that the receiver 4 alone can control the supply of power to the load 7.

The present invention has been made in view of this point, and will be explained in detail below with reference to Examples.

In FIG. 5, reference numeral 12 denotes an outlet, which is connected in series to the switching contact 6 and connected to the AC power source 8. 7 is the load, indicating that it is a capacitive load.
It consists of a series circuit of C _L and aircraft switch S _L. 13 is a load detection circuit that detects that the load 7 is connected to the outlet 12. Ne ₁ is a neon tube that operates as a voltage absorption element, with a resistor R ₁₃ connected in series and connected in parallel to the switching contact 6, and from the connection point of this series circuit to the rectifier circuit 14 via the resistor R ₁₄ . Connecting. G ₁₂ and G ₁₃ are inverter gates, which together with resistors R ₁₆ and R ₂₀ form a waveform shaping circuit 15, and a capacitor C ₈ and resistor R ₁₇ form a differentiation circuit 16. G ₁₄ is Batshua Gate. D ₂ is a diode that bypasses the input of the rectifier circuit 14 to the AC power supply 8 , and D ₄ is a diode that feeds back the output of the R-SF.F. 11 that drives the relay 5 to the input of the rectifier circuit 14 .

The point of receiving the on/off control signal from the transmitter 1 and turning on/off the opening/closing contact 6 is the same as that in FIG. 4, and will not be described here. If no load 7 is connected to outlet 12, no voltage will be generated across resistor _R13 . The voltage in this case refers to the voltage that charges the capacitor _C7 . Therefore, the output of the rectifier circuit 14 is zero. Here, the load 7 is connected with the switching contact 6 in the off state, and the machine switch S _L
is on, the neon tube Ne ₁ is connected to both ends of the resistor R ₁₃ .
An alternating current voltage is applied through the resistor
It is input to the rectifier circuit ₁₄ via R14. The capacitor _C7 of the rectifier circuit 14 is charged, the voltage of the capacitor _C7 rises, and when this voltage exceeds a certain voltage, the waveform shaping circuit 15 operates and the inverter gate _G13 , which was initially at "L" level, is activated. The output becomes "H" level. Inverter gate G ₁₃
Detecting that the output of the output changes to "H" level, the differentiating circuit 16 and the buffer gate _G14 generate a pulse of a constant width at the time of the change, and the set input S of the R-SF.F.11 is output via the transistor _Q3 . The pulse of the constant width is input to. In this case, the AND gate
The output of _G11 and the output of buffer gate _G14 are input to an OR gate (not shown), and the output of the OR gate is input to R.
- You may input it to the set input S in the bottom 11 of SF.F.
As described above, when the set input S of the R-SF.F. 11 becomes "H" level, the switching contact 6 is turned on.

As described above, the load detection circuit 13 applies an AC voltage to the load 7 to detect whether or not the load 7 is connected, so there is no problem even if a capacitive load is connected to the load 7. In addition, since a voltage absorption element such as the neon tube Ne ₁ is used at both ends of the load 7, a voltage subtracted from the voltage applied to the neon tube Ne ₁ is applied to both ends of the load 7, and the fluorescent lamp load In such cases, the glow lamp does not continue to be lit and shorten the life of the glow lamp. Furthermore, among the voltages applied to the resistor _R13 , when a voltage (hereinafter referred to as reverse voltage) flowing in the direction of the neon tube _Ne1 through the resistor _R13 is applied, it is bypassed by the diode _D2 , so the capacitor C ₇ will not charge. When the capacitor _C7 is charged with a voltage in this direction, the load detection circuit 13 does not operate. Also, after the switching contact 6 is turned on, no voltage is generated across the resistor _R13 in the direction of charging the capacitor _C7 , but R-SF.F.1
Since the output Q of 1 is connected to the capacitor C ₇ via the diode D ₄ , the switching contact 6 is turned on.
That is, when the output Q of the R-SF.F.11 is at the "H" level, voltage is applied across the capacitor _C7 , and the load detection circuit 13 is activated during normal on/off control by the transmitter 1. does not operate, and operates only when the load 7 is connected.

FIG. 6 shows a load detection circuit 1 according to another embodiment of the present invention.
In the circuit diagram of Figure 3, instead of diode D ₂ in Figure 5,
The transistor _Q4 and the resistor _R24 cut off the aforementioned reverse voltage generated across the resistor _R22 . That is, when the connection side of the resistor R ₂₂ to the AC power supply 8 becomes positive, the transistor Q ₄ turns on and prevents the capacitor C ₇ from being charged.
The diode D ₂ in FIG. 5 needs to have a high withstand voltage, but the transistor Q ₄ in FIG. 6 does not have a mode in which a high voltage is applied, so it can be a low voltage transistor and can be made inexpensive. Although a neon tube Ne ₁ was used as the voltage absorption element, other voltage absorption elements,
It goes without saying that a Zener diode, for example, has a similar function.

As described above, the present invention turns on and off switching contacts for load control using on/off control signals from a transmitter.
In a receiver of a remote control device configured to perform off-control, it receives an on-off control signal from a transmitter to turn on and off a switching contact, and also controls a load connected to an outlet connected in series with the switching contact. A load detection circuit is provided to detect that the aircraft switch is turned on by applying a low AC voltage to the load, and the output of the load detection circuit turns on the switching contact. Power can be supplied to the load using the load's body switch even if the on control signal is not used. In other words, by turning on the machine switch, the load detection circuit detects the connection state of the load connected to the outlet, and the load detection circuit output turns on the switching contact to turn on the load.
Therefore, although conventionally the operation of the load could not be controlled except from the transmitter, by providing the load detection circuit, there is an effect that the operation of the load can be controlled on the load side by turning on the load body switch. Moreover, since the load detection circuit applies an AC voltage to the load to detect whether the load is connected or not, it is possible to detect the connection state of the load even if a capacitive load is connected as the load. Furthermore, since the load detection circuit applies a low AC voltage, even if the load is a fluorescent lamp load, the glow lamp will not be turned on, and the life of the fluorescent lamp load can be extended. Furthermore, connect the series circuit of the outlet and the switching contact to the AC power supply,
A series circuit of a voltage absorbing element and a resistor is connected in parallel to the opening/closing contact, and the output is input to a rectifier circuit through another resistor from the connection point of the voltage absorbing element and the resistor, and the output of the rectifier circuit is shaped into a waveform. A pulse of a constant width is formed by a differentiating circuit at the rise of the output voltage after being shaped by the circuit, and the pulse of a constant width is supplied to the set input of the drive circuit of the relay that drives the switching contact, and the input of the rectifier circuit. is bypassed to the AC power source by a diode, and the output of the drive circuit of the relay is returned to the rectifier circuit via the diode, so power can be reliably supplied to the load by the aircraft switch, and furthermore, the output of the relay drive circuit is fed back to the rectifier circuit via the diode. A series circuit of a voltage absorbing element and two resistors is connected in parallel, and input is input from the connection point of the resistor to the rectifier circuit via another resistor, and the power supply connection end of the resistor connected in series with the voltage absorbing element is connected. Since a load detection circuit is provided, which is connected to the base of the transistor with another resistor, the collector of the transistor is connected to the input of the rectifier circuit, and the emitter is connected to ground, the structure is simple and inexpensive. It is something to play.

[Brief explanation of the drawing]

Fig. 1 is a basic circuit diagram of a remote control device according to the present invention, Fig. 2 is a circuit diagram of the same transmitter, and Fig. 3 is a
~c is an operation time chart same as above, FIG. 4 is a circuit diagram of a conventional receiver, FIG. 5 is a circuit diagram of one embodiment of the present invention, and FIG. 6 is a main circuit of another embodiment of the present invention. It is a diagram. 1... transmitter, 4... receiver, 5... relay,
6...Switching contact, 7...Load, 8...AC power supply,
11...Set reset flip-flop, 12
... Outlet, 13 ... Load detection circuit, 14
... Rectifier circuit, 15 ... Waveform shaping circuit, 16 ...
Differential circuit, Ne ₁ ... Voltage absorption element, R ₁₃ , R ₁₄ ,
R ₂₁ , R ₂₂ , R ₂₃ , R ₂₄ ... Resistor, D ₂ , D ₄ ... Diode, Q ₄ ... Transistor, S _L ... Airframe switch.

Claims (1)

[Claims] 1. In a receiver of a remote control device configured to control on/off switching contacts for load control using on/off control signals from the transmitter, the on/off control signals from the transmitter A load detection circuit receives the signal and turns on/off the switching contact, and also applies a low AC voltage to the load to detect that the machine switch of the load connected to the outlet connected in series with the switching contact is turned on. A receiver for a remote control device, wherein the switching contact is turned on by the output of the load detection circuit. 2. A series circuit of an outlet and a switching contact is connected to an AC power source, and a series circuit of a voltage absorbing element and a resistor is connected in parallel to the switching contact, and the voltage absorbing element and the resistor are connected in a positive half cycle of the AC power source. A load that inputs the voltage generated at the connection point between the voltage absorbing element and the resistor to the rectifier circuit via another resistor, and bypasses the voltage generated at the connection point between the voltage absorbing element and the resistor to the AC power source using a diode during a negative cycle of the AC power source. A detection circuit is provided, the output of the rectifier circuit is shaped by a waveform shaping circuit, and then a pulse of a constant width is formed by a differentiating circuit at the rise of the output voltage, and the pulse of the constant width is used to drive a relay that drives the opening/closing contact. A receiver for a remote control device according to claim 1, characterized in that the receiver is supplied to a set input of the circuit, and also feeds back the output of the drive circuit of the relay to the rectifier circuit via another diode. . 3 Connect a series circuit of an outlet and a switching contact to an AC power supply, connect a series circuit of a voltage absorbing element and two resistors in parallel to the switching contact, and connect a series circuit of a voltage absorbing element and two resistors to the switching contact through another resistor. The power supply connection end of a resistor connected in series to the voltage absorption element as well as the input to the rectifier circuit is connected to the base of the transistor via another resistor, the collector of the transistor is connected to the input of the rectifier circuit, and the emitter is grounded. 2. A receiver for a remote control device according to claim 1, further comprising a load detection circuit connected to the receiver.