JPS6048959B2 - wireless remote control - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION In the present invention, channels are set for each pair of transmitter 1 and receiver 2, and corresponding receiver 3 is set to 1 for each channel.
１－ノ 、、、、、、、 -１ -１４、－｜゛、嘗、、ι】－L■53【KO、、、、１３３日■一柘工訳 １－１－１４．－｜゛、嘗、、ι】−L■53【KO・、、、１３３日■１柘工訳 ３．Controlling the external load 3 In the wireless remote controller, N modulation frequencies (N is a natural number of 2 or more) are arranged in M pieces (M is a natural number of 2 or more) in chronological order to set each channel, and the transmitter 1 and receiver A modulated wave generating circuit 6 which generates a time-series modulated frequency signal according to the channel setting by the channel setting unit 4, and a modulated wave The transmitter 1 is equipped with a modulation circuit 7 that modulates a carrier wave using the output of the generator circuit 6, and the receiver 2 is equipped with N filter circuits 8, . . . 8N corresponding to N modulation frequencies, respectively. The outputs of the circuits 8, . A wireless remote controller is characterized in that it is configured to discriminate the calling of its own channel by comparing the setting order by the setting unit 5, and its purpose is to be able to freely set a large number of channels, and to To provide a wireless remote control which can easily change channels and eliminates the possibility of interference.

Generally, wireless devices that use radio waves are installed on walls, doors, etc.
Because signals can be transmitted even through windows, it can be used for a variety of purposes compared to other methods that use light or ultrasonic waves. It can be used for many purposes, such as notifying people when they are coming home from outside, or emergency notifications from the bathroom or toilet, and transmitting signals from outdoor crime prevention sensors in the garden or around the house. Because of their omnidirectional propagation characteristics, they propagate unconditionally to the surrounding environment, and if the number of set channels is small, there is a risk of mutual interference.

'The usual way to set this channel is to change the modulation frequency to distinguish each channel, but this method only allows channels to be set for about 10 to 2 hours, so many wireless devices If it becomes available, it is expected that a lot of interference will occur.

Therefore, in order to prevent such interference from occurring, it is necessary to increase the overall number of channels, but if interference still occurs, the customer must change the channel where the interference occurred to avoid interference. become. However, in order to switch channels, the modulation frequency is changed analogously on the transmitting side, and the inductance of the coil of the filter circuit, the capacitance of the capacitor, or the resistance value of the resistor is changed analogously on the receiving side in accordance with this modulation frequency. It is necessary to change the settings, and there is a problem that it becomes difficult or impossible for the user to change the channel settings, especially when the number of channels is increased. The present invention has been provided in view of the above points, and in order to achieve multi-channeling, each channel is set by arranging N modulation frequencies in M time series, and transmitters and By providing each receiver with a channel setting section, anyone can easily change the channel setting.One embodiment of the present invention will be described in detail below with reference to the drawings.

In the following example, by using four modulation frequencies with N=4 and arranging them in 10 time series with M=10, it is possible to set a channel of 410:10.5×lσ. It is set as. : Figure 1 shows the circuit diagram of transmitter 1! There is a channel setting section 4 formed of a matrix circuit like a pin board, and an arithmetic processing L like a microcomputer.
Formed with SI: a modulated wave generation circuit 6, a reference signal generation circuit 10 with an oscillation frequency of about 300 KHz that supplies a reference clock signal to the modulated wave generation circuit 6, and a 300M
a carrier wave generation circuit 11 having an oscillation frequency of about Hz;
The modulation circuit 7 is connected in series to the carrier wave generation circuit 11 and is controlled by the output of the modulation wave generation circuit 6. Thus, the modulated wave generation circuit 6 is connected to each terminal in 4 rows and 10 columns of the channel setting section 4, and selects each modulation frequency in each of the 4 rows of the channel setting section 4, and selects each modulation frequency in each of the m columns. It specifies each timing in the time series, and sequentially specifies the read timing of each column of the river column by the output of the modulated wave generation circuit 6, and reads the channel set row in the specified column (i.e., the timing (Specification data of the modulation frequency to be generated) is read into the modulation wave generation circuit 6, and based on this read data signal, the reference clock signal output from the reference signal generation circuit 10 is divided, and a predetermined modulation frequency signal is output. do. The modulated frequency signal which is obtained as the output of the modulated wave generation circuit 6 and which changes moment by moment at each time point in the time series is inputted to the modulation circuit 7, and the 300 MHz carrier wave generated by the carrier wave generation circuit 11 is
It is modulated by a modulation frequency signal obtained by combining and arranging x modulation frequencies in time series, and is emitted into space from an antenna that also serves as the oscillation coil 12. Therefore, as shown in Figure 2, the transmitted radio waves are sent as signals modulated at one of the four modulation frequencies at each of the first to tenth time timings in the time series. Normally, for the purpose of improving the reliability of signal transmission and preventing malfunction, a time-series modulated frequency signal consisting of these time timings is sent out multiple times, and then if a separate control signal is required, it is controlled. Sends data to call the receiver 2 of the channel, and the called receiver 2 controls the external load 3 based on the reception control data, and the external load 3 controlled by the receiver 2 is unique. If it is determined that there is only one control content, there is no need to send separate control data, and the above-mentioned time-series modulated frequency signal can be used to set the channel of each receiver 2 and to adjust the external load caused by the receiver 2. 3 is transmitted, and when the receiver 2 receives a time-series modulated frequency signal as shown in FIG. The external load 3 is controlled to turn on and off at the same time. In addition, when transmitting control data other than the time-series modulated frequency signal for channel calling, for example, the frequency of the modulated L frequency signal transmitted after this time-series modulated frequency signal is made to correspond to the control content for each external load, Further, the control data may also be transmitted using a time-series modulated frequency signal different from that for channel calling. FIG. 3 shows a circuit diagram of a receiver 2 according to an embodiment of the present invention.
A gain amplifier 14 whose gain is set to about 80 dB, and four band-pass filter circuits 8, . . . , whose center frequencies are set to F, ~F, respectively.

and these filter circuits 8,...8. , a channel setting section 5 formed of something like a pin board, and the comparators 15, . . . formed of an arithmetic processing LSI such as a microcomputer. - 15, a channel discrimination circuit 9 which inputs the output of the group and the output of the channel setting section 5, and the channel discrimination circuit 9 further discriminates the control data signal, and is a speaker drive circuit which drives the speaker as the external load 3. 16 and a relay 17 that controls an appropriate external load.
8 is driven and controlled according to the content of the received control data signal. Therefore, the modulated carrier signal received by the receiving antenna 19 is amplified and demodulated by the front end 13, and then sent to each filter circuit 8, via the gain amplifier 14.
...8. are input in parallel. Filter circuit 8,...
・8 corresponds to each of the four modulation frequencies F, . . . F4, and generates an output from the filter circuit 8, . 15,...15. corresponding filter circuits 8, . . . 8. It is determined whether an output has occurred in
Therefore, one of the comparators 151...15 is selected depending on the frequency of the demodulated signal received at that time. An output is generated and input to the channel discrimination circuit 9.The channel discrimination circuit 9 inputs each output of the comparators 15, . . . It is configured to set sequential column signals for the boat matrix and read the output from the row where the channel setting in this specified group has been performed.
If the first demodulated signal in the time series produces an output in one of the comparators 151...15, then the comparator 15,...15 that produced this output
, and the channel set row in the first column that is read into the channel discrimination circuit 9 when the read command signal in the first column is given to the channel setting section 5 as the first in the time series. The channel determination circuit 9 compares and determines the numbers, and if they match, it waits for the comparators 15, . The comparators 15, . . . , 15 which gave the signal and produced an output also at this second time timing. If the number matches the number of the row in which the channel is set in the second column, the third reception waiting state is entered in the same manner. Thus, the comparators 15, . . . 15 operated at the time timings from the first to the first time. When all the numbers match the numbers in the rows in which channels are set from the first column to the first page of the channel setting section 5, it is determined that the channel of the receiver 2 has been called, and this The external load 3 is directly controlled by the discrimination signal, or the channel discrimination circuit 9 is switched to the control data signal reception mode, and the external load 3 is controlled according to the content of the received control data. When controlling the speaker drive circuit 16 shown in the figure when controlling the external load 3, a signal obtained by appropriately frequency-dividing the internal clock signal is given from the channel discrimination circuit 9, and this frequency-divided signal causes the speaker to ring. It is designed to do so. Figure 4 shows the filter circuit 8
, and a comparator 15, in which the input terminal of the filter circuit 81 is connected to the gain amplifier 154.
The output of the comparator 15 is input to the channel discrimination circuit 9. As described above, in the present invention, the transmitter is provided with a channel setting section and a modulated wave generation circuit, and the receiver is provided with a channel setting section and a channel discrimination circuit. Although it is possible to set a large number of NM channels by arranging M channels in time series, the channel setting sections provided in the transmitter and receiver are constructed using a matrix circuit such as a pin board. Because it is configured, anyone can freely change channels by simply setting pins corresponding to channels in the rows and columns of the pinboard, and it is possible to set a large number of channels. This has the effect of reducing the risk of malfunction due to interference, and even if malfunction occurs due to interference, anyone can freely and easily avoid the interference by changing the channel. .

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of a transmitter according to an embodiment of the present invention, FIG. 2 is a waveform diagram of a modulated frequency signal sequence arranged in time series, and FIG.
The figure is a circuit block diagram of the receiver same as above, and FIG. 4 is a circuit diagram showing an example of the filter circuit and comparator same as above. Channel setting sections of the transmitter and receiver, respectively; 6 is a modulated wave generation circuit; 7 is a modulation circuit; 8, . . . , 8N are filter circuits; and 9 is a channel discrimination circuit.

Claims (1)

[Claims] 1 Set the channel for each pair of transmitter and receiver,
In a wireless remote control that calls a corresponding receiver for each channel and controls an external load by the called receiver, N modulation frequencies (N is 2
The above natural numbers) are arranged chronologically in M pieces (M is a natural number of 2 or more) to set each channel, and a channel setting section is provided in each of the transmitter and receiver with a matrix circuit like a pin board, The transmitter is equipped with a modulated wave generation circuit that generates a time-series modulation frequency according to the channel setting by the channel setting section, and a modulation circuit that modulates a carrier wave using the output of this modulated wave generation circuit.
N filter circuits corresponding to respective modulation frequencies are provided, each output of these filter circuits and the output of the channel setting section are input to a channel discrimination circuit, and the output order of each filter circuit is discriminated by the channel discrimination circuit. A wireless remote controller is configured to discriminate whether a channel is being called by comparing the order of settings made by a channel setting section.