JPS62299198A - Ultrasonic remote controller - Google Patents

Abstract

PURPOSE:To identify various signal contents transmitted with an ultrasonic microphone by providing a control circuit to amplitude-modulate two optional frequencies in the unstable multivibrator of plural oscillating frequencies. CONSTITUTION:The frequency of one of two optional unstable multivibrators 2 is, as a control signal, a carrier-frequency (fc) used when a transmitting signal is executed, and a carrier, for which the transmitting signal is executed by a modulator 4, is amplitude-modulated by a frequency (fa) oscillated by other unstable multivibrator 2. In such case for a carrier (fc) not audible to a human body and other oscillating frequency (fa), the loser side wave of the frequency component of fc-fa is generated by the amplitude modulation, while an audible frequency component is included as a 'beat,' an ultrasonic microphone is oscillated and controlled and the transmitting condition can be recognized with an ear. By selecting (fal) with a selecting switch for the oscillating frequency (fa), the 'beat' different from the one mentioned earlier of an fc-fal can be heard by the human body.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention Industrial Application Field The present invention relates to an ultrasonic remote control device that uses ultrasonic waves as a means of control in a wireless remote control device (hereinafter referred to as a remote control device). It is.

2. Prior Art Conventionally, there have been two methods for remote control devices, one using infrared rays and the other using ultrasonic waves, but each has advantages and disadvantages, and one of them has become mainstream depending on the state of technological development at the time. In recent years, many infrared systems have been used.
The content selected by the SI1o1 switch 102 is translated into a transmission signal, the transmission infrared LED IP3 is made to emit light, the signal is received by the reception LED 105, the signal is amplified by the amplifier 106, and the carrier frequency is removed and detected by the diode IQ7. The system was configured as a remote control device that used a receiving LSI to identify and control the output.

On the other hand, ultrasonic remote control devices have been reviewed in recent years because they can be easily configured as remote control devices that do not use complicated transmission signals compared to infrared type devices.

Problems to be Solved by the Invention However, with such conventional configurations, both infrared and ultrasonic systems use signals that cannot be recognized by the human five senses, and there are teeth,
so that the user of the remote control device can determine the transmission status.
For example, if a display element such as an LED is attached to the transmitter side, the power of the transmitter will increase, and if a power source such as a battery is used, the lifespan will be shortened. In addition, if a transmitter has a large number of transmission codes, it will not be possible to transmit in the dark. There have been problems in that many display elements are used to identify the state and the drive circuit for the display elements is complicated.

The present invention is intended to solve these conventional problems, and aims to provide an ultrasonic remote control device that uses an ultrasonic remote control device that has been reviewed in recent years and can identify the transmission state. It is.

Means for Solving the Problem In order to solve this problem, the present invention has a switch for selecting any two oscillation frequencies in an astable multivibrator with a plurality of different oscillation frequencies oscillated by a power source such as a battery. The ultrasonic microphone includes a control circuit and an ultrasonic microphone whose oscillation is controlled by the control circuit.

Function: The ultrasonic remote control device having this configuration performs amplitude modulation of two arbitrary frequencies using the control circuit, and the resulting lower side wave becomes an audible frequency.

EXAMPLE An example of the present invention will be described below with reference to the drawings. FIG. 1 shows a block diagram of an ultrasonic remote control device according to an embodiment of the present invention. In an astable multivibrator 2 with a plurality of different oscillation frequencies oscillated by a power source 6 such as a battery, any two frequencies can be controlled. One of the frequencies selected by the selectable switch 3 is used as a signal carrier wave (frequency is fc), and the other (frequency is fa) is oscillated and corner-modulated by a modulator 4, and oscillation is controlled by the ultrasonic microphone 1. . Note that 6 in the figure represents a Korg, and 7 represents an amplifier.

The operation of the ultrasonic remote control device of this embodiment configured as described above will be explained below.

First, the frequency of one of two arbitrary astable multivibrators 2 is used as a control signal, and the carrier frequency fc used when converting it into a transmission signal, and the carrier wave converted into a transmission signal by the modulator 4 is used as a control signal. The amplitude is modulated by the frequency fa oscillated by the multivibrator 2.

At this time, the carrier wave f is inaudible to the human body. and other oscillation frequencies fa by amplitude modulation. The lower side wave of the frequency component of -fa is generated, and the ultrasonic microphone is controlled to oscillate in a state where the audio frequency component is included as "1 beat", and the transmission state can be recognized by the ear. By selecting 8 with the selection switch, the human body hears a "beat" that is different from that of f.-fal.

As described above, according to this embodiment, the transmission state of the ultrasonic remote controller can be identified from the amplitude modulation of two arbitrary oscillation frequencies.

In the above configuration, there is one ultrasonic microphone for transmission, but as shown in Figure 3, there is one ultrasonic microphone for transmission signals.
If one ultrasonic microphone is used and the other ultrasonic microphone is set to oscillate at a different frequency, the amplitude will be modulated in the air, and a similar 6-beat effect can be obtained. If the other ultrasonic microphone is also encoded as a transmission signal and oscillates as shown in Figure 2, it will be heard as an intermittent sound, so the type of transmission signal can be identified by the different intermittent sounds.

Effects of the Invention As is clear from the above description of the embodiments, according to the present invention, by providing a control circuit that modulates the oscillator of two arbitrary frequencies in an astable multivibrator with a plurality of oscillation frequencies, an ultrasonic microphone can be produced. In addition to being able to identify the contents of various signals emitted by the The effect is that the machine can be made cheaper and lighter.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the configuration of an ultrasonic remote control device according to an embodiment of the present invention, and FIG. 2 is a diagram showing the relationship between carrier waves and side waves.
Fig. 3 and Fig. 4 respectively show the present invention 1... Ultrasonic microphone, 2... Astable multivibrator, 3... Frequency selection switch, 4...
...Modulator, 6...Power source for batteries, etc., 6...
...Korg, 8...Ear, 9...Lower side wave. Name of agent: Patent attorney Toshio Nakao and one other person
Shichiho m-ni 2, -yuku -4 blow 3rd figure

Claims (2)

[Claims] (1) Equipped with a power source such as a battery, an astable multivibrator with a plurality of different oscillation frequencies oscillated by the power source, and a control circuit having a switch for selecting any two oscillation frequencies from the plurality of oscillation frequencies. and an ultrasonic microphone whose oscillation is controlled by this control circuit. (2) The control circuit amplitude modulates arbitrary two frequencies in an astable multivibrator with a plurality of different oscillation frequencies, with one being the carrier wave of the main signal and the other being the lower side wave generated by modulation with the above frequency. The ultrasonic remote control device according to claim 1, wherein the oscillation wave is converted into an audible frequency.