JP2000320238A - Voice guide system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To send a predetermined message to a specified walker having a portable terminal by using a door opening and shutting control sensor. SOLUTION: A voice guide system comprises a door opening and shutting control sensor 10 for an automatic door and a portable terminal 20 carried by a walker. The door opening and shutting control sensor 10 is provided with an infrared emitting element 11, an infrared receiving element 12 and their control means 13, and furthermore it is provided with a carrier oscillator 16, an information output means 17, an FM modulator 18 to FM-modulate carrier waves based on the information signals, a signal synthesizer 19 to synthesize the FM-modulated signals to an infrared emission driving pulse. The portable terminal 20 is equipped with a light receiving part 21 to receive an infrared signal outputted from the infrared emitting element 11, a demodulation means 23 to extract and demodulate the FM-modulated signals included in the infrared signal, and a speaker 25 driven based on the output of the demodulation means 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a voice guidance system, and more particularly, to a voice guidance system for transmitting a predetermined voice message using a sensor for controlling the opening and closing of an automatic door.

[0002]

2. Description of the Related Art Voice guidance systems are used in various places such as exhibitions, department stores, shopping streets, stations, and museums. Most of the contents are information on places and explanations of exhibits, but it is rather troublesome for those who already know the contents and explanations.

[0003] In order to provide voice guidance only to a specific person, a transceiver is used. In the case of a product exhibition or an art museum as an example, for example, a transmitter is installed in each booth, and a receiver is lent to a visitor as requested. According to this, the visitor can personally listen to the explanation of the exhibit at each booth using earphones or the like simply by moving.

[0004]

As an alternative to voice guidance, there is a visual guidance method such as a guidance board or a display board, but this is not effective for a visually impaired person.

[0005] Therefore, especially for blind people,
It is desired to introduce a voice guidance system using the above-described transceiver in department stores, shopping mall streets, and various facilities and buildings such as hospitals.

However, this requires a new transmitter to be installed for each key point, and thus the cost burden for introducing the system becomes a major obstacle. In addition, in the case of existing facilities, it is desirable to install them with a good appearance,
That means extra work.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to utilize a door open / close control sensor of an automatic door provided in many buildings. Another object of the present invention is to provide a voice guidance system capable of providing voice guidance to a specific person.

That is, the present invention is constructed from a door opening / closing control sensor for an automatic door and a portable terminal carried by a pedestrian, and when the portable terminal enters the monitoring area of the door opening / closing control sensor. Wherein the portable terminal responds and informs the portable pedestrian of predetermined information by voice, wherein the door open / close control sensor includes an infrared signal toward the monitoring area of the automatic door. An infrared light emitting element for outputting the infrared light, an infrared light receiving element for detecting the infrared pulse signal, and a control for sending a drive pulse to the infrared light emitting element at a constant period and controlling the opening and closing of the automatic door based on the output of the infrared light receiving element In addition to the means, a carrier oscillator that outputs a carrier wave of a predetermined frequency,
An information output means for outputting an information signal to be transmitted to the pedestrian; an FM modulator for FM-modulating a carrier outputted from the carrier wave oscillator with an information signal from the information output means; and a driving pulse for the infrared light emitting element And a signal synthesizer for synthesizing an FM modulation signal by the FM modulator. The portable terminal includes a light receiving unit that receives an infrared signal output from the infrared light emitting element and is included in the infrared signal. A demodulator for extracting and demodulating the FM modulation signal and a speaker driven based on an output of the demodulator are provided.

In the present invention, the information signal output from the information output means may be either analog or digital. In the case of analog, for example, LS
An audio recording / reproducing device using I or a magnetic tape as a recording medium can be used. According to this, a message desired to be conveyed by the microphone can be input and changed at any time, and the carrier is FM-modulated by the audio signal.

When the information signal is digitally output from the information output means, it is preferable to use an encoded ID signal (message identification signal).
Digital modulation (FSK) is performed by the D signal.

[0011] In this case, however, the portable terminal side:
Digital memory (preferably a flash memory card) in which a message corresponding to the ID signal is written
A message reading means for receiving the ID signal demodulated by the demodulating means and selecting and reading a corresponding message from the digital memory; and a D for converting the message read by the message reading means into an analog signal. A / A converter is further provided, and a speaker is driven by the output of the D / A converter.

Regardless of whether the carrier is analog-modulated or digital-modulated, the level (amplitude value) of the FM modulation signal output from the infrared light emitting element is set to be lower than the level of the monitoring infrared light output from the infrared light emitting element. By setting the value to a low value, interference of the FM modulated signal with the monitoring infrared ray is prevented, and the power consumption can be reduced.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be described in more detail with reference to an embodiment shown in the drawings.

As shown in the block diagram of FIG.
This voice guidance system is basically constructed of a door opening / closing control sensor 10 for controlling automatic door opening / closing and a portable terminal 20 carried by a pedestrian (for example, a blind person).

The door opening / closing control sensor 10 is provided with an infrared sensor comprising an infrared light emitting element 11 and an infrared light receiving element 12. This infrared sensor may be of a reflection type or a transmission type (beam type), but is a reflection type in this embodiment.

That is, infrared rays are emitted from the infrared light emitting element 11 toward a monitoring area set on the floor near the automatic door (not shown), and the reflected light is reflected by the infrared light receiving element 1.
The light is received at 2. In this embodiment, the infrared light emitting element 11 is composed of a light emitting diode, and the infrared light receiving element 12 is a light receiving diode.

The door opening / closing control sensor 10 has a microprocessor 13 as control means. The microprocessor 13 outputs a drive pulse at a constant cycle. This drive pulse is applied to the infrared light emitting element 1 via the drive circuit 14.
Given to one. As a result, infrared rays for monitoring are emitted from the infrared light emitting element 11 at regular intervals toward the monitoring area of the automatic door.

The infrared light receiving element 12 receives the reflected light and outputs a signal corresponding to the amount of the received light. This light reception output signal is input to the microprocessor 13 after being amplified by the amplifier 15 in a predetermined manner. Microprocessor 13
Monitors the level of the light reception output signal and outputs an opening / closing signal to the drive circuit of the automatic door according to the level fluctuation.

The above is the basic configuration of the door sensor. The door opening / closing control sensor 10 additionally outputs a carrier wave oscillator 16 for outputting a carrier wave of a predetermined frequency and an information signal to be transmitted to a pedestrian. Information output means 17
An FM modulator 18 for FM-modulating the carrier with an information signal from an information output means 17;
FM modulated to one drive pulse by the FM modulator 18
A signal synthesizer 19 for synthesizing the modulated signal.

Instead of using the carrier wave oscillator 16, the clock signal of the microprocessor 13 may be frequency-divided to obtain a carrier wave of a predetermined frequency, and such a mode is also included in the present invention.

In the present invention, the information output means 17 has the following two forms. The first mode is a case where an information signal is output as an analog signal. For this purpose, for example, an audio recording / reproducing device using an LSI or a magnetic tape as a recording medium is used. According to this, a message desired to be conveyed by the microphone can be input and changed at any time, and the carrier is FM-modulated by the audio signal.

The second mode is a case where an information signal is output as an encoded digital ID signal (message identification signal). In this case, the information output means 17 has, for example, a RAM (random access memory).
ry), and the carrier is digitally modulated (FSK) by the ID signal. In any case, the reading of information from the information output means 17 is controlled by the microprocessor 13.

The FM signal modulated by the FM modulator 18 is combined (superimposed) by a combiner 19 with a drive pulse sent from the microprocessor 13 at a constant period. Therefore, based on the synthesized signal, the infrared light emitting element 11 outputs the monitoring infrared light and the FM by the driving pulse.
An information transmission infrared ray based on the modulation signal is output.

The portable terminal 20 has an infrared light emitting element 1
There is provided a light receiving section 21 for receiving infrared rays from 1. The light receiving unit 21 may be a light receiving diode or a light receiving transistor, like the infrared light receiving element 12 on the door opening / closing control sensor 10 side.

The light receiving section 21 is connected to demodulation means 23 via a carrier amplifier 22. The carrier wave amplifier 22 has a filter function, extracts only a carrier wave (FM modulated wave) from the combined signal output from the light receiving unit 21, and amplifies the carrier wave in a predetermined manner.

The demodulation means 23 has an intermediate frequency amplification function and an FM demodulation function for converting and amplifying to another frequency in order to increase the selectivity of the carrier wave.
Is demodulated by the demodulation means 23. Then, the demodulated signal is supplied to the power amplifier 24, which drives the speaker 25. The speaker 25 may be an earphone type.

According to this embodiment, the portable terminal 20
An information signal sent from the door opening / closing control sensor 10 is a digital ID signal (in the case of the second embodiment described above).
It is configured to be able to handle the case where

That is, the digital memory 26 in which the message corresponding to the ID signal is written,
Receiving the demodulated ID signal at the digital memory 26
And a D / A converter 28 for converting a message read by the message reading means 27 into an analog signal. I have.

In this example, a flash memory card is used for the digital memory 26. In this flash memory card, the voice is pre-compressed and stored as a file.
The file is read out by the microprocessor 7 in response to the ID signal.

This file data (message) is D /
The signal is converted to an analog signal by an A converter 28 and is supplied to a power amplifier 24 that drives a speaker 25.
An input selection switch 29 for switching between the A converter 28 is provided.

That is, when the information signal sent from the door opening / closing control sensor 10 is an analog signal, the input selection switch 29 is switched to the demodulation means 23 side. When the information signal is a digital ID signal, the input selection switch 29 is switched. 2
9 is switched to the D / A converter 28 side. This switching is controlled by a microprocessor as the message reading means 27.

Here, an example of information (message) transmitted from the door opening / closing control sensor 10 to the portable terminal 20 will be described in the case of a hospital. "This door is an entrance for internal medicine. It is on the left side in the future. "" The medical treatment time is from 〜 to 時 hours. "" The medical treatment of today is finished. "

When the digital memory 26 is used, each message as described above is compressed and written in advance in a flash memory card or the like, and an ID signal corresponding to each message is transmitted to the door opening / closing control sensor 1.
It will be sent from 0.

Next, a driving pulse of the infrared light emitting element 11 and a synthesized signal obtained by synthesizing the driving pulse with the FM modulation signal will be described with reference to FIGS.

First, the driving pulse of the infrared light emitting element 11 will be described with reference to FIG. Note that FIG. 1 shows only a pair of infrared light emitting elements 11 and infrared light receiving elements 12, but actually a plurality of pairs (CH1 to CH3 in this example).
), And each pair is in charge of a different monitoring area near the automatic door.

According to the timing chart of FIG.
A driving pulse having a width of 80 μS (microsecond) is transmitted at a cycle of 16 mS (millisecond) to each of the infrared light emitting elements 11, and each channel has a delay time of 2 mS. That is, the driving pulse is transmitted to the infrared light emitting element 11 of each channel with a delay of 2 mS.

FIGS. 3 and 4 show waveform diagrams in which an FM modulation signal modulated by the FM modulator 18 is combined with a driving pulse for the infrared light emitting element 11 of each channel. FIG. 3 shows an example in which FM modulation signals by analog modulation are combined, and FIG. 4 shows an example in which FM modulation signals by digital modulation (FSK; frequency shift keying) are combined.

In the case of FIG. 3, the FM modulation signal is synthesized (superimposed) for a portion other than the drive pulse for the infrared light emitting element 11, but in the case of the FSK modulation of FIG.
For a predetermined time immediately after the drive pulse, in this example, 1.92 mS
Only the FSK modulated wave is synthesized.

In any case, the level (amplitude) of the FM modulation signal synthesized on each channel may be set smaller than the level of the driving pulse of the infrared light emitting element 11 sent from the microprocessor 13. According to this method, it is possible to prevent interference of the FM modulation signal with the monitoring infrared ray and reduce power consumption.

According to this voice guidance system, the pedestrian having the portable terminal 20 can use the door open / close control sensor 10
, When the FM modulated signal is received,
Predetermined information is obtained by the speaker 25.

Further, it is only necessary to add a carrier wave oscillator 16, an information output means 17, an FM modulator 18 and a synthesizer 19 to the existing door opening / closing control sensor 10, so that a large capital investment is required. Instead, it is possible to introduce this voice guidance system.

Although the present invention has been described with reference to specific embodiments, the present invention is not limited to these embodiments. It should be understood that modifications and equivalent techniques that can be easily made by those skilled in the art are included in the present invention.

For example, when the ID signal is not used,
The portable terminal 20 does not require the digital memory 26, the message reading means (microprocessor) 27, the D / A converter 28, and the input selection switch 29. The power amplifier 24 of the speaker 25 may be connected to the output side of the demodulating means 23. .

On the other hand, when only the ID signal is used, the D / D
A power amplifier 24 of a speaker 25 is provided at an output side of the A converter 28.
Should be connected.

[0045]

As described above, according to the present invention,
By using a door opening / closing control sensor (infrared sensor) of the automatic door, a predetermined message can be sent to a specific pedestrian having a portable terminal.

Therefore, since it is not necessary to separately provide a dedicated sensor for the voice guidance system, this voice guidance system can be easily and inexpensively manufactured without a significant construction work in a building having an automatic door such as a hospital. Can be introduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a voice guidance system according to the present invention.

FIG. 2 is a timing chart of an infrared light emitting element driving pulse sent from a microprocessor in the door opening / closing control sensor of the embodiment.

FIG. 3 shows an analog F pulse for driving the infrared light emitting element.
9 is a timing chart of a combined signal obtained by combining M modulation signals.

FIG. 4 is a timing chart of a synthesized signal obtained by synthesizing a digital FM modulation signal (FSK) with the infrared light emitting element driving pulse.

[Explanation of symbols]

 Reference Signs List 10 door opening / closing control sensor 11 infrared light emitting element 12 infrared light receiving element 13 microprocessor 14 infrared light emitting element driving circuit 15 light receiving amplifier of infrared light receiving element 16 carrier wave oscillator 17 information output means 18 FM modulator 19 synthesizer 20 portable terminal 21 light receiving section 22 Carrier amplifier 23 demodulation means 24 power amplifier 25 speaker 26 digital memory (flash memory card) 27 message reading means (microprocessor) 28 D / A converter 29 input selection switch

Claims (4)

[Claims] An automatic door control system comprising: a door opening / closing control sensor for an automatic door; and a portable terminal carried by a pedestrian. A voice guidance system in which a terminal responds and informs the portable pedestrian of predetermined information by voice, wherein the door opening / closing control sensor outputs an infrared signal toward a monitoring area of the automatic door. In addition to a light emitting element, an infrared light receiving element for detecting the infrared pulse signal thereof, and a drive pulse transmitted to the infrared light emitting element at a constant period, and a control means for controlling opening and closing of the automatic door based on an output of the infrared light receiving element. A carrier oscillator that outputs a carrier wave of a predetermined frequency, an information output unit that outputs an information signal to be transmitted to the pedestrian, and a signal output from the carrier oscillator. An FM modulator for FM-modulating the transmission with an information signal from the information output means; and a signal synthesizer for synthesizing an FM modulation signal by the FM modulator with a driving pulse of the infrared light emitting element. The terminal includes: a light receiving unit that receives an infrared signal output from the infrared light emitting element; a demodulating unit that extracts and demodulates the FM modulation signal included in the infrared signal; A voice guidance system comprising a driven speaker. 2. The voice guidance system according to claim 1, wherein a voice recording / reproducing device is used as the information output means, and the carrier is FM-modulated by the voice signal. 3. When the information signal output from the information output means is an encoded digital ID signal and the carrier is FM-modulated by the ID signal, the portable terminal includes the ID signal. And a message reading means for receiving the ID signal demodulated by the demodulation means, selecting and reading the corresponding message from the digital memory, and reading the message by the message reading means. 2. A voice guidance system according to claim 1, further comprising a D / A converter for converting the output message into an analog signal, wherein the speaker is driven by an output of the D / A converter. . 4. The level of the FM modulation signal output from the infrared light emitting element is set to a value lower than the level of monitoring infrared light output from the infrared light emitting element. The voice guidance system according to any one of claims 1 to 3.