JPS6255356B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a remote control device for controlling the lighting of a lighting fixture attached to a ceiling surface from a remote location, for example.

This type of device needs to be equipped with a transmitter and a receiver installed in a load such as a lighting fixture to prevent the lighting fixture from malfunctioning due to external noise. Therefore, it is conceivable to transmit and receive FM signals in order to distinguish the external noise, but the circuit configurations such as the FM signal forming circuit on the transmitter side and the FM detection circuit on the receiver side are complicated. Furthermore, Japanese Patent Application Laid-Open No. 49-28793 discloses a remote control device using ultrasonic waves, but the remote control signal in this device depends on the length of time the operation button of the ultrasonic generator is pressed. However, only one pulse with a specified duration is oscillated, and if that one massage signal is lost due to some reason such as noise and is not received correctly, normal operation will not occur. There are drawbacks that cannot be expected.

The present invention was invented in view of this point, and one embodiment of the present invention will be described below with reference to the drawings.
In Figure 1, 1 is attached to the ceiling of the room,
This is a hook ceiling socket connected to indoor wiring, and electromechanically connects a hook ceiling plug 4 originally provided at the tip of a cord 3 of a lighting fixture 2. In the present invention, a receiver main body 5 containing receiver circuit components described later is attached between the socket 1 and the plug 4. The receiver main body has a plug 6 on the upper surface that is coupled and fixed to the socket 1, a socket 7 that is coupled and fixed to the plug 4 on the lower surface, and a ceramic microphone 9 that receives signals from the transmitter main body 8 on the lower surface. and indicator light 1
0 is set. The transmitter body 8 is also provided with a ceramic speaker 11 for transmitting signals, an indicator light 12, and an operation switch 13, and houses transmitter circuit components to be described later, and also has a charging plug 14 for charging the built-in secondary battery. is installed.

As shown in Figure 2a, the transmitter consists of a power supply circuit, an oscillation circuit, a control circuit, an amplification circuit, and a ceramic speaker SP.In order to make it portable, a secondary battery E is used in the power supply circuit. Equipped with a charging circuit. The details of each of these circuits are explained in the second section.
Shown in Figure b.

The charging circuit is the plug blade 15 of the charging plug 14,
The step-down transformer T ₁ has a primary coil connected to the transformer 15, and a rectifier diode D ₁ and a current limiting resistor R ₁ connected to the secondary coil side of the transformer.

The power supply circuit consists of a secondary battery E, a constant voltage circuit connected to both ends of the secondary battery E, and an operation switch 13, and the constant voltage circuit is mainly composed of a transistor _Q1 , resistors _R2 to _R4 , and a constant voltage diode _D2 . ,
A series circuit of a light emitting diode D ₃ as an indicator light ₁₂ and backflow blocking diodes D ₄ and D ₅ is connected in parallel to the collector resistor R 4 . light emitting diode
Since the voltage drop of the current limiting resistor _R1 is applied to _D3 , it indicates when the secondary battery E is being charged, and when the secondary battery voltage decreases, the transistor _Q1 turns off, the light goes out, and the battery E is terminated. Display voltage. Further, the constant voltage circuit generates a constant voltage V _A.

The oscillation circuit consists of inverter ₁ and NAND,
When the operation switch ₁₃ is closed, the carrier wave frequency fo is obtained by the time constant of the capacitor C ₁ and the resistor R ₅ .

The control circuit consists of inverters I ₂ and I ₃ , and the pulse width t ₁ is determined by the time constant of a capacitor C ₂ and a resistor R ₆ .
A pulse train with a pulse interval t ₂ is generated (Fig. 4a). Inverters I ₁ to I ₃ and NAND, NA ₁ are one
It may also be configured with a NAND integrated circuit. NAND,
One terminal of NA ₁ is for Stroop input,
A carrier wave is generated at "H" level. Therefore, the pulse width t ₁ is equal to the carrier wave frequency fo.
Note that the resistors R ₇ and R ₈ are resistors for clamping a swing voltage higher than the drain voltage and source voltage by the capacitors C ₁ and C _2, respectively. In addition, in the embodiment, fo=
40KHz, t ₁ ≒ t ₂ = 100ms.

The amplification circuit converts the pulse oscillation wave obtained from the oscillation circuit into a carrier wave frequency using a resistor _R9 and a capacitor _C3 .
If only fo is made into a sine wave and inputted to the base of transistor _Q2 , an output of about 70Vp-p can be obtained from step-up transformer L. When this voltage is applied to the ceramic speaker SP, it emits an ultrasonic pulse _P1 shown in FIG. 4A. Oscillation is stopped by opening the operation switch 13. R ₁₀ and R ₁₁ are bias resistors,
_C4 is a capacitor.

Next, as shown in Fig. 3a, the receiver connects in cascade the amplification circuit, detection circuit, filter circuit, envelope detection circuit, storage circuit, and control circuit XI connected to the ceramic microphone M, and also adjusts the power supply voltage of these circuits. It consists of power supply circuit XII that supplies

Power supply circuit XII steps down the voltage of the commercial input from the hook ceiling plug 6 with a step-down transformer _T2 ,
By rectifying with D ₆ and smoothing with capacitor C ₄ , an unstabilized voltage V _B is obtained, and at the same time, a stabilized voltage V _C is obtained with resistor R ₁₂ , constant voltage diode D ₇ and smoothing capacitor C ₆ . The stabilized voltage becomes the power supply voltage for the integrated circuit, and the unregulated voltage V _B becomes the other power supply voltage.

The amplifying circuit consists of transistors Q ₃ to _{Q 5} , capacitors C ₇ to _{C 12} and resistors R ₁₃ to _{R 23} , and mainly amplifies the carrier wave frequency fo of the input signal P ₁ from the ceramic microphone M, and sends it to the final stage. An output signal _P2 shown in FIG. 4B is produced as the collector output of transistor _Q5 .

The detection circuit uses a diode D ₈ , a resistor R ₂₄ and a capacitor C ₁₃ to smooth the carrier frequency fo to obtain a pulse signal, and further uses a resistor R ₂₅ and a buffer B consisting of two inverters to generate a noise-free signal as shown in Fig. 4C. Outputs stable output signal _P3 .

_The filter circuit includes circuits ′ and ″, and the output signal P ₄ (FIG. 4D) of the inverter I ₄ of the circuit ′ and the output signal P ₅ (Fig. 4 D) of _the inverter I ₅ of the circuit ″ This is a circuit that synthesizes the signals shown in Figure E using NAND and NA _2. The detection output signal P ₃ is divided by resistors R ₂₆ and R ₂₇ at the rise time, and the input of inverter I ₄ is held at "H". The inverter output _P4 is "L". When the detection output signal _P3 falls, the capacitor _C14 is charged via the resistor _R26 , so the inverter output is the capacitor _C14 and the resistor _R26.
"H" output is produced with a pulse width of time constant _t3 . Therefore, ' becomes a circuit for detecting the fall of the detection output signal _P3 . On the other hand, the detection output signal P ₃ becomes the input signal of the circuit ', that is, the input signal of NOR, NO ₁ ,
The circuit ' consisting of NOR, NO ₁ , NO ₂ , inverter _I5, etc. outputs an output signal _P5 (Fig. 4 E) with a pulse width _t5 only for pulse signals with a pulse width longer than a predetermined pulse width _t4 . . The pulse width t ₄ is determined by the time constant of the capacitor C ₁₅ and the resistor R ₂₈ , and the pulse width t ₅ is determined by the time constant of the capacitor C ₁₆ and the resistor R _29. In the example, t ₄ = 90 ms and t = 20 ms. There is. Therefore, the pulse width t ₁ of the detection output signal P ₃ is the predetermined pulse width t ₄
If it is narrower, the output P ₅ of NOR and NO ₂ is “L”
The NAND, NA ₂ output signal _P6 remains at the "H" level and no "L" level output is produced. When the pulse width t ₁ of the detection output signal P ₃ is different
Figure 5 shows the changes in the output signal _P6 of NAND, _NA2 . In addition, D ₉ and D ₁₀ in Fig. 3b are diodes, and C ₁₇
is a capacitor.

Envelope detection circuit uses filter output signal
The retriggerable monostable multivibrator F ₁ with P ₆ as input maintains the output signal P ₇ at the "H" level as shown in Figure 4 G while the pulse of the filter output signal P ₆ is being output. do. The output signal
P ₇ maintains the "H" level for a certain period t ₆ after the pulse of the filter output signal P ₆ disappears, and the certain period t ₆ is determined by the time constant of the capacitor C ₁₈ and the resistor R ₃₀ , as shown in FIG. Pulse width of ultrasonic pulse _P1 shown in A
It is set longer than the sum (t ₁ +t ₂ ) of t ₁ and pulse interval t ₂ .

The memory circuit uses a D-input bistable multivibrator _F2 , and obtains a Q output and an output from the output signal _P7 of the envelope detection circuit. The output of Q is applied to the base of the transistor _Q6 via the resistor _R31 , and lights up the light emitting diode _D11 as the position indicator light 10 of the ceramic microphone M when the lighting device 2 is not in operation. The output signal _P8 is maintained at the "H" level by the first output signal _P7 of the envelope detection circuit, and the transmitter operation switch 1 is
The second output signal P ₇ ' of the envelope detection circuit is turned on again after being turned off once, and becomes the "L" level signal P ₈ '.

The control circuit XI has a hook ceiling socket 7 connected to the hook ceiling plug 6 of the power supply circuit XII via a relay switch S, and the hook ceiling plug 4 of the lighting device 2 is coupled to the socket.
The control circuit XI also has a transistor _Q7 whose collector load is a relay coil RY that opens and closes the relay switch S, and the output signal of the memory circuit, that is, the output of the bistable multivibrator _F2, is connected to the base of the transistor Q7 via a resistor _R32 . Signal _P8 is applied. Therefore, when the output signal _P8 is at the "H" level, the relay switch S closes and the lighting fixture 2 lights up, and the output signal _P8
When is at the "L" level, the lighting fixture 2 is turned off by opening the relay switch S.

As described above, according to the present invention, the filter circuit transmits and receives equidistant rectangular wave pulses on which a carrier wave is superimposed, detects a pulse having a predetermined detection output pulse width among the received pulses, and provides a predetermined output. The predetermined output is obtained by combining both output signals of a circuit that detects a pulse having a pulse width of An envelope detection circuit whose width is longer than the sum of its pulse interval is connected to the input side of the memory circuit, so even if the first transmitted pulse cannot be received for some reason, if the next consecutive pulse can be received. To turn a lighting device on and off, and to prevent the output of a storage circuit from becoming unstable even when rectangular wave pulses at predetermined intervals are continuously received and a large number of pulses from a filter circuit are output in succession. Therefore, even without using an FM signal as a transmitting/receiving signal, the remote control operation becomes stable and reliable, and the circuit configuration of the transmitter/receiver can be simplified compared to one using an FM signal.

[Brief explanation of the drawing]

The drawings show an embodiment of the device according to the invention, FIG. 1 being a partial perspective view of a luminaire with a transceiver;
Fig. 2a is a block diagram of the transmitter, b is its specific circuit diagram, Fig. 3a is a block diagram of the receiver, b is its specific circuit diagram, Fig. 4 is a waveform diagram for explaining operation, Fig. 5 The figure is a waveform diagram showing different output signals of the filter circuit for detection output signals of different pulse widths. P ₁ ...Square wave pulse, 8...Transmitter (main body),
2...Load (lighting equipment), 5...Receiver (main body),
...detection circuit, ...filter circuit, ...
Envelope detection circuit,...memory circuit, XI...
Control circuit, ″...predetermined pulse width detection circuit,
′...Pulse falling detection circuit.

Claims (1)

[Claims] 1 comprising means for continuously transmitting rectangular wave pulses of a predetermined width on which a carrier wave is superimposed at equal intervals, and means for receiving the rectangular wave pulses, and the receiving means includes a circuit for detecting the received wave, and the detection circuit. a filter circuit that detects the width of the output pulse of the filter circuit and generates a predetermined output pulse; an envelope detection circuit that can be retriggered by the output pulse of the filter circuit; and a memory circuit that is inverted by the output signal of the envelope detection circuit; a control circuit that controls the load using the output signal of the storage circuit; the filter circuit includes a circuit that detects only pulses having a predetermined pulse width from among the output pulses of the detection circuit; Consists of a circuit that detects the falling edge.
The output signals from both circuits are combined to obtain the predetermined output pulse and output to the envelope detection circuit, and the delay time of the envelope detection circuit is determined by the pulse width of the rectangular wave pulse and the pulse interval thereof. A remote control device characterized by being set longer than the sum.