JPH0487500A - Wireless remote control system - Google Patents

Abstract

PURPOSE:To use plural remote controllers for one master set by outputting a transmission signal of a different frequency from a master set sequentially in a radio wave and forming plural resonance circuits resonated with the transmission signal to a remote controller so as to select them by a switch. CONSTITUTION:A master set 1 is provided with a signal generator 4 generating a transmission signal of a different frequency designated in advance at a prescribed period sequentially and uses a relay to select an FM-modulated signal, for example, at a prescribed period. The signal generating section 4 receives a power voltage VCC and its output terminal is connected to one contact (a) of a switch section 5 selecting the transmission mode and the reception mode for a prescribed period. The other contact (b) of the switch section 5 is connected to the input side of a detection section 6 amplifying an echo (reflecting signal) from remote controllers 2, 3 to detect the presence of the echo, and a common terminal (c) of the switch section 5 is connected to a loop antenna L1 for radio transmission and reception.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a main unit that outputs control signals to electrical equipment in a house, and a remote control (remote control) that performs wireless transmission and reception between the main unit and the main unit. The present invention relates to a wireless remote control system consisting of a device.

[Conventional technology] Conventionally, this type of wireless remote control system has
For example, there is one shown in Japanese Patent Laid-Open No. 62-27891. This is configured as a locking detection device that detects the locking of a sliding door, and a processing section on the main device side and a sensor section on the remote control device side are coupled by electromagnetic induction. In other words, the fixed coil of the oscillation circuit on the base unit side and the movable coil of the sensor circuit on the remote control device side are arranged to face each other when the sliding door is closed, and both coils are placed close to each other. At times, the LC resonance circuit of the sensor section is activated.

(Problem to be Solved by the Invention) However, in the conventional remote control system using electromagnetic inductive coupling as described above, the detection distance between the base unit and the remote control device is short, and the distance between the remote control device and the base is short. However, since the remote control device requires a power source and an active element for transmitting signals, the structure becomes complicated.
In addition to being expensive, it is necessary to direct the signal generation section toward the controlled object, and since the sensor section of the remote control device is composed of an LC resonant circuit, the frequency width required to identify the same number of channels is limited. The problem was that it was wide.

This invention was made by focusing on these problems, and it is possible to use a plurality of remote control devices in the base unit, the detection distance is long, the structure of the remote control device is simple, and there is no need for a power supply. It is an object of the present invention to provide a wireless remote control system that does not require the signal generating section to be directed toward a controlled object and that uses a narrow frequency range.

[Means to solve the problem]

The wireless remote control system of the present invention is configured as follows.

(2) Consists of a base unit that sequentially wirelessly outputs transmission signals of different frequencies, and a remote control unit that receives the transmission signals transmitted from the base unit, and the remote control unit has multiple units that can be turned on and off by operating the operation unit. , a circuit in which vibrators having different resonance frequencies are connected in series to each of these switches, a resonant circuit section having a loop antenna for transmission and reception, and a capacitor, and the base unit is configured to connect to the resonant circuit section of the remote control device. A signal generating section that sequentially generates a transmission signal of the same frequency as the resonant frequency of each vibrator, and a detecting section that detects a reflected signal output from the remote control device when any switch of the remote control device is turned on. Ta.

(2) Consists of a base unit that sequentially outputs transmission signals of specific frequencies wirelessly, and a remote control device that receives the transmission signals transmitted from the base unit, and the remote control device is turned on and off by operating the operation unit. The main device includes a plurality of switches, a circuit in which a load capacitance is connected in series to each of these switches to generate a resonance frequency, a resonant circuit section having a vibrator, a loop antenna for transmitting and receiving, and a capacitor, A signal generating section that sequentially generates a transmission signal of the same frequency as the resonance frequency due to each load capacitance of the resonant circuit section of the remote control device and a reflected signal output from the remote control device when either switch of the remote control device is turned on are detected. A detection section is provided.

(2) In the above-mentioned wireless remote control system, the signal generator of the base unit generates transmission signals of different frequencies at a predetermined cycle, and the switch unit for switching between the transmission mode and the reception mode at a predetermined cycle is activated by the base unit. It was established in

[Effect]

In the wireless remote control system of the present invention, transmission signals of different frequencies are sequentially transmitted wirelessly from the base unit at, for example, a predetermined period. Then, when a desired switch is operated with the remote control device, the switch is turned on, and a mutually induced current flows through the resonant circuit by the transmission signal having the resonant frequency corresponding to the switch. At this time, a reflected signal is output from the remote control device, this signal is detected by the detection section of the base unit, and control corresponding to the operation of the switch is performed.

(Embodiment) FIG. 1 is a schematic diagram showing the configuration of a wireless remote control system according to an embodiment of the present invention. This system is
It consists of a base unit 1 that sequentially outputs transmission signals of different frequencies wirelessly, and two remote control devices 2.3 that receive the transmission signal 13 transmitted from this base unit 1. One of the remote control units 2 is a fixed type. The remote control device 3 is configured as a centralized control panel, and the other remote control device 3 is portable.

The base unit 1 includes a signal generator 4 that sequentially generates transmission signals of different pre-specified frequencies at a predetermined cycle, and switches, for example, an FM modulated signal at a constant cycle using a relay. This signal generating section 4 has a power supply voltage ■c
c is input, and the output terminal is connected to one contact a of a switch section 5 that switches between a transmission mode and a reception mode at a predetermined period. The other contact point of the switch section 5 is connected to the input end of a detection section 6 that amplifies echoes (reflected signals) from remote control devices 2 and 3 to be described later and detects the presence or absence of the echoes. The common terminal C of No. 5 is connected to a loop antenna L for wireless transmission and reception. This loop antenna L1 does not have to be integrated, but may have separate antennas for transmission and reception. Further, the output side of the detection section 6 is connected to the input side of a processing section 7 that performs predetermined signal processing, and the output side of the processing section 7 is connected to the input end of the control section 8. The control unit 8 is configured to output control signals to controlled objects such as electric shutters, lighting equipment, and electric doors.

The remote control device 2 has a plurality of switches S on the front operation section.

-57 push button sections are provided, and each of the switches S0 to S is turned on and off by pressing these push button sections.

In the example shown in the figure, the 1st floor (floor) shutters, entrance lock, 2nd floor shutters, and IF blinds are opened and closed by remote control (OPEN, 5H).
UT) switches S0 to S7 are arranged. And these switches S. ~S7 are connected in series with crystal oscillators each having a different resonance frequency (fo-f?), and the signal generating section 4 of the base unit 1 has the same frequency as the resonance frequency of these crystal oscillators. The transmitting signals including the signals are sequentially generated.

Further, the remote control device 3 is also equipped with switches 88 to 510 similar to the remote control device 2. In the example shown, the switch S8 is for turning on and off the lighting equipment (ONloFF);
Switch S9. SlO is used for dimming control. And these switches 88-S. Also, respectively f8~f
Crystal resonators having a resonance frequency of lo are connected in series to form a resonance circuit section.

FIG. 2 is a circuit diagram showing the configuration of the transmitting and receiving sections of the base unit 1 and the remote control device 3. As shown in FIG.

The loop antenna L of base unit 1 has a function as a coil, and a capacitor CI is connected in series with the antenna L.
A C resonance circuit is formed. And remote control device 3
Loop antenna L for transmitting and receiving also has the function of a coil.
2 are provided, and these loop antennas Ll,
The base unit 1 and the remote control device 3 are configured to be coupled by mutual guidance M by L2. In addition, the remote control unit M3
A capacitor C2 is connected in parallel with the loop antenna L2, and each switch 88-S. The above-mentioned resonant frequency f
Circuits in which crystal resonators X8 to XIO having different angles of 8 to f1 degrees are connected in series are connected in parallel. This parallel circuit, capacitor C2, and loop antenna L2 form a resonant circuit section 9 of the LCX resonant circuit.

FIG. 3 is a perspective view showing the internal structure of the remote control device 3. As shown in FIG. As shown in the figure, the loop antenna L2 is provided in a coil shape and is embedded within the housing.

Note that the remote control device 2 is also configured in the same manner as the remote control device 3.

Next, the operation will be explained.

As mentioned above, the signal generator 4 of the base unit 1 outputs signals of different frequencies at a constant cycle, and the switch unit 5 selects contacts a and b according to the cycle, and selects the transmit mode and the receive mode. has been switched. Then, a transmission signal of the specific frequency mentioned above is outputted at a constant cycle via the loop antenna L1. In this state, if, for example, the switch S8 of the remote control device 3 is operated and turned on, the remote control device A current flows through the resonant circuit section 9 of No. 3, and the aforementioned echo of frequency f6 is output.

This echo is received by base unit 1 and detected by detection unit 6. Then, based on the detected information, a control signal is output from the control section 8 to a predetermined controlled object. At this time, it is necessary to keep pressing the switch S8 of the remote control device 3 until the transmission signal of the corresponding frequency f6 is received.

Next, the above-mentioned transmission and reception operations will be explained step by step.

(i) First, when the switch unit 5 of the base unit 1 falls to the contact a side, a current with a certain frequency f x (X = O to 10) flows from the signal generating unit 4 to the loop antenna L1.

(ii) As a result, magnetic flux is generated in the loop antenna L, and at this time, it is directly connected to the switch turned on by the push button suppression operation among the multiple crystal oscillators X0 to x18 in the remote control device 2.3. A current due to mutual induction flows only through the vibrators that are connected.

(iri) Next, the switch unit 5 of the base unit 1 falls to the contact side, and as a result, the magnetic flux from the loop antenna L1 disappears, and the magnetic flux (
echo) occurs.

(iv) Due to the echo from the remote control device 2.3 above,
A current flows through the loop antenna of base unit 1 due to mutual induction.

(V) The detection section 6 amplifies the induced current to detect the presence or absence of an echo and its frequency, and outputs the information to the processing section 7.

Then, a signal subjected to predetermined signal processing is outputted from the processing section 7 to the control section 8, and a control signal (drive signal) is outputted from the control section 8 to the controlled object corresponding to the detection frequency.

(vi) The next frequency f8 or + from the signal generator 4 of the base unit 1
(When X=tO, f.) A signal is generated.

(vji) The switch unit 5 is switched to the contact a side, and the operations (i) to (vi) described above are repeated.

Note that when an echo is output from the remote control device 2.3 in the operation (iii) above, since a crystal resonator is used in the resonant circuit, the attenuation of the echo is gradual. Also, (v
) When detecting an echo, even if a signal with a frequency other than the one corresponding to the turned-on switch of the remote controllers 2 and 3 is output from the base unit 1, it will not be detected because the attenuation is large.

In this way, wireless transmission and reception is performed between the base unit 1 and the remote control device 2.3, and the remote control device 2.3 can remotely control the controlled object.

At this time, in this embodiment, since the remote control device 2.3 is configured with the LCX resonant circuit as described above, the L
The attenuation of the echo is more gradual than when using the C resonant circuit, the echo level after the same amount of time has passed, and the detection distance is therefore longer. Figure 4 shows the echo level (V) and time (1) when using the LCX resonant circuit of this example.
FIG. 5 shows the relationship between the echo level (Vl and time (1)) when a conventional LC resonant circuit is used.

Figures 4(a) and 5(a) show the main unit 1 and the remote control device 2.
．． When the distance between 3 and 3 is short (several cm), Fig. 4(b),
Fig. 5(b) shows the case of an intermediate distance, and Fig. 4(C) and Fig. 5(C) show the case of a long distance (several meters). The time required for switching the switch unit 5, ΔV, indicates the echo amplitude necessary for detection. In this embodiment, detection is possible up to the intermediate distance shown in FIG. 4(b), but with the LC circuit, detection is not possible as shown in FIG. 5(b).

Moreover, with the configuration of the above embodiment, a plurality of remote control devices 2, 3 can be used for -1 base unit 1, and the structure of the remote control device 2.3 can also be simplified. That is,
Since mutual induction is used, there is no need to use active elements for power supply and transmission in the remote control device 2.3, and there is no need to direct the remote control device 2.3 toward the object to be controlled. Furthermore, since the Q (resonance selectivity) of the LCX resonant circuit is larger than that of the LC resonant circuit, the frequency width required to identify the same number of channels is narrower, and the cost can be reduced.

FIG. 6 is an explanatory diagram showing an example of the case where the above-mentioned remote control system is applied to a control system in a house. The main body of the main unit 1 is installed in the ceiling, etc., and the loop antenna L1 is installed around the ceiling in the room. Also, this base unit 1
are lighting equipment 10, electric shutters and electric blinds 11.
It is connected to the electric door lock device 12 and the like through a signal line, and is also connected to an LED display 13 that displays various control contents.

FIG. 7 is a circuit diagram showing another embodiment of the present invention, in which only the configurations of the transmitting and receiving sections of the base unit 1 and the remote control device 3 are shown, and the other configurations are the same as those of the previous embodiment. ing. In this embodiment, the resonant circuit section 9 of the remote control device M3 is
Each switch 38 to S. It is composed of a circuit in which load capacitances CXa to CX, which make the resonance frequencies different from each other, are connected in series, a single crystal resonator X, a loop antenna L2 for transmitting and receiving, and a capacitor C2.

FIG. 8 shows the internal configuration of this remote control device 3.

In the remote control device 3 configured in this way, the load capacitance CX, ~CX, o added in series to the crystal oscillator
The number of oscillations of the crystal resonator X changes accordingly. and,
This number of oscillations, that is, the load capacitances Cx8 to CX + o are selected by switches S8 to S810.

That is, even with such a configuration, it is possible to provide the same function as the resonant circuit section 9 of FIG. 2, and therefore, it is possible to obtain the same effect as the above-described embodiment.

〔Effect of the invention〕

As described above, according to the present invention, transmission signals of different frequencies are sequentially output wirelessly from the base unit, and a plurality of resonant circuits that resonate with the e-mail transmission signal are configured on the remote control device side, and can be selected by a switch. Since the reflected signal from this remote control device is detected by the base unit, multiple remote control devices can be used on the base unit, and the detection distance is also longer. Therefore, the structure of the remote control device is simplified, there is no need to direct the signal generating section toward the object to be controlled, and the frequency width used can be narrowed.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing the configuration of a wireless remote control system according to an embodiment of the present invention, FIG. FIGS. 4(a) and 4(b) are perspective views showing the internal configuration of the remote control device shown in FIG. (C) is a characteristic diagram showing the relationship between the echo level and time in the resonant circuit section of FIG. 2, and FIG. 5(a). (b), (C> are characteristic diagrams showing the relationship between echo level and time in a conventional resonant circuit section, and Fig. 6 shows an example of the case where the remote control system of Fig. 1 is applied to a control system in a house. An explanatory diagram, FIG. 7 is a circuit diagram showing another embodiment of the present invention, and FIG. 8 is a perspective view showing the internal configuration of the remote control device shown in FIG. 7. 1. Base unit 2. 3...Remote control device 4...Signal generation section 5...Switch section 6...Detection section 7...Processing section 8... ...Control unit 9...Resonance circuit section, L2...Loop antenna C,,C2...
...Capacitor

Claims (3)

[Claims] (1) Consists of a base unit that sequentially wirelessly outputs transmission signals of different frequencies and a remote control device that receives the transmission signals transmitted from the base unit, and the remote control device is turned on and off by operating the operation unit. The main device includes a plurality of switches, a parallel circuit in which vibrators having different resonance frequencies are connected in series to each of these switches, and a resonant circuit section having a loop antenna for transmission and reception and a capacitor, a signal generating section that sequentially generates a transmission signal having the same frequency as the resonant frequency of each vibrator of the circuit section; and a detecting section that detects a reflected signal output from the remote control device when any switch of the remote control device is turned on. A wireless remote control system featuring: (2) Consists of a base unit that sequentially wirelessly outputs transmission signals of different frequencies and a remote control device that receives the transmission signals transmitted from the base unit, and the remote control device is turned on and off by operating the operation unit. The base unit includes a plurality of switches, a parallel circuit in which load capacitances are connected in series to each switch to have different resonance frequencies, a resonant circuit section having a vibrator, a loop antenna for transmitting and receiving, and a capacitor, A signal generating section that sequentially generates a transmission signal of the same frequency as the resonance frequency due to each load capacitance of the resonant circuit section of the remote control device and a reflected signal output from the remote control device when either switch of the remote control device is turned on are detected. A wireless remote control system comprising: a detection unit for detecting (3) The signal generating section of the base unit is characterized in that the base unit is provided with a switch unit that generates transmission signals of different frequencies at a predetermined cycle and switches between a transmission mode and a reception mode at a predetermined cycle. The wireless remote control system according to claim 1 or 2.