JPH10107662A - Information communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform simultaneous broadcasting of plural information by using weak radio waves and to obtain an inexpensive information communication system which does not have noise environmental pollution by transmitting service information in a weak radio wave and receiving and outputting service information which corresponds to a selected carrier frequency. SOLUTION: A transmitter 2 comprises an ultra high frequency transistor output circuit which outputs weak power of AM or FM broadcast frequencies, a crystal oscillator circuit which has high frequency stability and a modulator circuit, modulates data when an information signal generator 1 inputs it, turns ON-OFF a transmission operation through a control signal that is inputted from a signal controlling part 5 and outputs data to a mixer 3. Data is mixed by the mixer 3 and sent to transmitting antennas ANT1 to ANTn. Radio waves which are emitted from the antennas ANT1 to ANTn are detected by a tuning receiver when a frequency selective switch that selects a frequency is operated. A detected sound signal drives a speaker SP and sound information is communicated to a listener as a sound output.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information transmission system using weak radio waves of a radio broadcast frequency.

[0002]

2. Description of the Related Art For example, gas stations and markets,
In a predetermined service area such as an exhibition hall, PA (Public) is used as a means of transmitting business advertisements, service information, etc. for unspecified large numbers of people or passenger cars of about tens to hundreds of people.
Address) In addition to the loudspeaker method using amplified voice as represented by a speaker, a small transmitter connected to a loop antenna using electromagnetic induction and a plurality of portable electromagnetic induction receivers (rented to users) ) Was common.

[0003] These methods are selected after predicting the information to be transmitted and the intention of the receiver (such as the preference of information and the difficulty of receiving operation). When transmitting to a plurality of recipients at the same time without crosstalk, the electromagnetic induction method or the like is used,
In a wide place where crosstalk is not a problem in information transmission, a voice-based loudspeaker method is used.

[0004] Either of these methods is appropriate for the equipment to be used and the cost for its operation, and the receiver is familiar and easily accepted.

[0005]

However, any of the methods still has the following problems. The wide-ranging method of speaking has no scope for the listener to select information, and depending on the method of operation, may cause disgust to people unrelated to the information transmitted, and may be regarded as a problem in severe cases as noise pollution. There is.

In the case of the electromagnetic induction system, it is necessary to prepare an electromagnetic induction receiver, and since this receiver is a dedicated receiver of the system to be used, it is difficult to expect mass production effects, so that the receiver is relatively expensive. But it doesn't exist everywhere. An object of the present invention is to realize an information transmission system that solves these and other problems.

[0007]

SUMMARY OF THE INVENTION The present invention relates to an information transmission system for transmitting information to a mobile unit within a predetermined service area by a weak radio wave having a radio broadcast frequency band,
Information output means for respectively outputting a plurality of different service information, transmission means for transmitting each service information by a weak radio wave at a carrier frequency corresponding to each service information in the information output means, provided in the mobile body, Receiving means for receiving and outputting service information corresponding to the selected carrier frequency.

[0008] Further, a moving body detecting means for detecting the intrusion of a moving body into the predetermined service area, the information output means based on a moving body detection signal detected by the moving body detecting means, and the transmitting means. Control means for controlling the operation and non-operation of the information processing means, and an alarm means, wherein the control means performs the information output means and the transmission only when the moving object detection signal indicates invasion of a moving object in a predetermined time zone. Means for operating the warning means when the moving object detection signal indicates the invasion of the moving object outside of the predetermined time period.

[0009] Further, there is provided display means installed in the predetermined service area for displaying each of the carrier frequencies, a type of each service information corresponding to each of the carrier frequencies, and a content of each of the service information. It is characterized by the following.

[0010]

Next, an embodiment of the present invention will be described. FIG.
FIG. 1 is a configuration diagram showing a configuration of an embodiment of the present invention. In the present embodiment, it is assumed that a receiver for receiving an information signal uses a portable radio receiver, which is now widely used as a personal radio, or a car radio mounted on an automobile.

As shown in FIG. 1A, reference numeral 1 denotes an information signal generator (corresponding to an information output stage) which is constituted by a tape player, for example, a tape on which necessary information to be transmitted to the player is recorded. The tape player is loaded and the operation such as start and stop of the tape player is performed by a control signal input from the signal control unit 5, and the audio signal of the player is output to the modulator of the transmitter 2.

It is necessary to prepare a plurality of devices as necessary for the information signal generator. That is, if there are n types of information to be transmitted simultaneously, n devices are required. When all day operation is required or when the same information is repeatedly transmitted, the tape player is of an endless display mode capable of performing an endless display such as an auto-reversing type which is easy to operate.

Further, in the case of an operation operation by an automatic switch, which will be described later, the information signal generator 1 automatically enters a ready state (a message on a recording tape is caught) in which information is started when the automatic operation is completed. It is configured to be reset. Reference numeral 2 denotes a transmitter (corresponding to a transmitting means), which includes an ultrahigh-frequency transistor output circuit for outputting a very small power of an AM or FM broadcast frequency, a crystal oscillation circuit having a high frequency stability, a modulation circuit, and the like. The signal is modulated by an input from the controller 3, the transmission operation is turned on / off by a control signal input from the signal control unit 5, and output to the mixer 3.

The electric power of the radio wave is adjusted so as to be effective only in the service area. If the transmitter 2 has n types of information to be transmitted, n devices having different frequencies are required. In addition, the condition for selecting and setting the AM broadcast frequency band or the FM broadcast frequency band is that electromagnetic waves radiated from all information transmission systems must be mainly allowed within the regulation values of the Radio Law. , Taking into account the overall background noise depending on the installation location (such as the intensity of normal radio broadcast waves during the day and night and the yearly season, and the noise electric field intensity of fluorescent lamps and mercury lamps, etc.), A wide frequency band of a service area that can be stably received with clear voice is a setting condition and is selectively set.

The arrangement of the plurality of different frequencies is such that, when each frequency is received by a single receiver of the listener, the reception frequency is set in accordance with the frequency arrangement.
It is desirable that the transmission frequencies are arranged closely at certain intervals so that the tuning operation can be easily performed. In other words, the tuning operation of the receiver is performed by rotating the tuning dial, by pressing the search button to select a station, or by presetting a frequency and then pressing the preset button to select a preset station. Is generally equipped with a search tuning function, so if the transmission frequencies are arranged closely at certain intervals, all the arranged frequencies can be easily selected by pressing the search button sequentially. be able to.

Reference numeral 3 denotes a mixer, which is composed of a hybrid coil in which a plurality of input and output coils are wound around a toroidal ferrite core, or a plurality of resistor pads, and the like. Transmission antenna AN
Output to T1, ANT2, and ANTn. Reference numeral 4 denotes a sensor, which uses an infrared sensor or the like and includes a plurality of sensor units 41 and the like corresponding to the number of necessary places to be detected.

After detecting and processing infrared rays emitted from a human body, a car, or the like by each photoelectric element of the sensor unit 41, the detected power is output to a signal control section 5 (corresponding to control means). Reference numeral 5 denotes a signal control unit, which is an automatic switch for automatically selecting an operation based on an input signal for controlling the start or end of a broadcast from the sensor 4, and a broadcast operation at an arbitrary time manually regardless of an input signal from the sensor 4. Switch, an operation condition setting input keyboard 52 for initially setting automatic operation conditions, a signal processing / discriminating unit 51 mainly composed of a microprocessor, etc., and an information signal generator 1 and transmission as required. Control for starting and stopping the operation of the machine 2 or for operating the security alarm device is performed.

FIG. 2B shows a configuration on the receiving side, which is represented by a car radio. Radio waves of each frequency radiated from the transmitting antennas ANT1, ANT2, ANTn and the like input to the car antenna ANT have the same frequency. By operating the selected frequency selection switch, the audio signal detected by the tuning receiver drives the speaker SP and transmits audio information to the listener as an audio output.

FIG. 2 is a block diagram showing the configuration of the sensor output processing and the signal control section 5, which are the details of the inside of the sensor 4, which will be described. 41 is a sensor unit, and n sensor units are used as necessary, and each sensor unit (from A to n)
Is output to the combiner 42 that combines the respective detection signals.

Reference numeral 43 denotes a signal shaping unit which is composed of a capacitor and an OP amplifier, etc., detects a level which is continuous for a certain period of time among detection signals inputted from the coupler 42, and temporarily stores and holds a detection result for a certain period of time. Then, an erroneous detection signal is removed, and a necessary detection signal is output to the signal processing / determination unit 51. Reference numeral 51 denotes a signal processing / discriminating unit which is constituted by a microprocessor and its peripheral circuits, and detects a detection signal input from the signal shaping unit 43 and an operation condition signal previously input from an operation condition setting input keyboard 52 (this microprocessor sends the detection signal to the microprocessor). The operation condition signal is stored), and the result of the determination is output to one of the two output lines.

In this embodiment, the sensor 4 and the signal control unit 5 are separated from each other. However, the sensor 4 and the signal control unit 5 may be incorporated. That is, one output is output as a broadcast control signal, the other output is a security alarm control signal output for controlling a security alarm and the like, and the sensor 4 is used for both controlling the operation of the broadcasting means and controlling the operation of the security alarm. Means are provided.

According to this, the service advertisement broadcasting and the security alarm can be used together without increasing the cost. FIG. 3 is a pattern diagram showing an example of a detection range. In the sensor unit 41, a concave mirror or the like divided into several segments having different curvatures is arranged rearward of the photoelectric element and gathered toward the photoelectric element. It is configured to emit light, and the detection pattern is as shown in a side view shown in FIG. 7A and a plan view shown in FIG. 7B. A signal that changes through the detection pattern due to the movement of the object is output from the sensor unit 41. .

Next, the operation will be described. First, the sensor 4 outputs either the broadcast control signal or the security alarm control signal by an internally processed signal output,
The operation condition setting is performed by the signal processing /
It is initially input to the RAM of the microprocessor (not shown) of the determination unit 51.

This input is, for example, "business day", "business hours", "details during business hours (such as cueing of a message on a recording tape)", and non-business days, and the like. The information that is deemed necessary and the behavior of the recipient are predicted and input. Next, when the manual switch arranged in the signal control unit 5 is turned on, the operation of each information signal generator 1 and each transmitter 2 is started, and the transmission antennas ANT1 to ANTn are started.
A weak radio wave on which each information signal is superimposed is emitted.

When operating with this manual switch,
It is desirable that the information signal generator 1 operates in the end display mode (the recording tape has an arrangement of recorded information according to the end display method). next,
When the manual switch arranged in the signal control unit 5 is switched and the automatic switch is turned on, the number of persons from the sensor 4 during the business hours is determined based on the business day, time, and the like set by the operating condition setting input keyboard 52. The operation of each of the information signal generators 1 and each of the transmitters 2 is started by a detection signal output when the vehicle moves (enters), and a weak radio wave on which the information signals are superimposed is transmitted by the transmitting antennas ANT1 to ANTn.
Radiated from

Thus, the information signal generator 1 and the transmitter 2
Can be prevented from operating wastefully. When operated by the automatic switch, the information signal generator 1 may be automatically reset to an initial preparation state (a message on a recording tape is cued) in which information is started each time the automatic operation is completed. desirable. However, based on the time interval of the time when the detection signal for detecting the moving object is generated within a short time, the selection of whether the end display is good or the reset play for locating the message of the recording tape is good is made in a timely manner. Then, the operating condition setting input keyboard 52 may be operated.

Furthermore, when the intrusion of a person or a car is detected from the sensor 4 during non-business hours, the alarm device 7 is operated. The alarm device 7 includes a buzzer and an alarm lamp that are activated by an input control signal. As a practical example in which the above operation is performed, FIG. 4 shows an installation example of the present system at a gas station.

Although the information signal generator 1, the transmitter 2, the security alarm and the like are not shown, they are installed in the office of a gas station or the like. Since fluorescent lamps and discharge lamps are frequently used, the FM broadcast frequency with little background noise is preferable for transmission. In this installation example, the transmitting antennas ANT1 to ANT
The sensor n and the sensor 4 are arranged on the ceiling of the gas station premises (positions effective for performing functions that anticipate the average number of approach routes of vehicles and their traffic lines).

As an example of the type of information simultaneously broadcasted, "store service advertisement information" (for example, when the carrier frequency is 8
0.0 MHz), "road traffic information" (for example, carrier frequency 81.0 MHz), "weather forecast" (for example, carrier frequency 82.0 MHz), "sightseeing information" (for example, carrier frequency 83.0 MHz), etc. The information signal generator 1 uses at least four, the number of which is set to the greatest common divisor among the various driving purposes of the vehicle.

An image display unit 6 for displaying the frequency at which these pieces of information are broadcast, the type of information, and its contents.
Is arranged on a wall or the like that can be easily seen from each vehicle interior, and information display is performed based on the video information signal input from a video signal generator (not shown), so that the information transmission method and the like by the present system is visually known. Therefore, a large number of people who come to the store tune to the carrier frequency corresponding to the desired information of the car radio, and the above information is easily transmitted.

As described above, according to the present embodiment, since a weak radio wave is used, the listener can arbitrarily select information for one-way information transmission, and it is possible to prevent noise pollution and the like from occurring. Can be. Further, since the receiver used is an existing personal organic device such as a car radio, it is not necessary to prepare further, no additional cost is required, and the overall cost of the system can be reduced. it can.

[0032]

As described above in detail, according to the present invention, simultaneous pollution of a plurality of pieces of information using a weak radio wave, and control of broadcasting by detecting a signal of an object such as a person or a vehicle. It is possible to realize a low-priced information transmission system without any problem.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is a configuration diagram illustrating a sensor output processing configuration and a signal control unit.

FIG. 3 is a diagram showing an example of a detection range pattern of a sensor.

FIG. 4 is a diagram showing an example of arrangement of the present system at a gas station.

[Explanation of symbols]

 1 ... Information signal generator 2 ... Transmitter 3 ... Mixer 4 ... Sensor 5 ... Signal control unit 6 ... Image display Unit 7 Alarm device 41 Sensor unit 42 Combiner 43 Signal shaping unit 51 Signal processing / discriminating unit 52 Operation condition setting input keyboard

Claims (3)

[Claims] 1. An information transmission system for transmitting information to a mobile unit within a predetermined service area by a weak radio wave having a broadcast frequency band of a radio, comprising: information output means for outputting a plurality of different pieces of service information; Transmitting means for transmitting each service information by a weak radio wave at a carrier frequency corresponding to each service information in the output means; and receiving and outputting service information provided on the mobile body and corresponding to the selected carrier frequency. An information transmission system, comprising: a receiving means. 2. A moving object detecting means for detecting an intrusion of a moving object into the predetermined service area; a data output means based on a moving object detection signal detected by the moving object detecting means; and the transmitting means. Works,
Control means for controlling non-operation; and alarm means, wherein the control means operates the information output means and the transmission means only when the moving object detection signal indicates invasion of a moving object in a predetermined time zone. 2. The information transmission system according to claim 1, wherein the warning unit is operated when the moving object detection signal indicates the invasion of the moving object outside of the predetermined time period. 3. It is installed in the predetermined service area,
3. The system according to claim 1, further comprising a display unit for displaying each of the carrier frequencies, a type of each service information corresponding to each of the carrier frequencies, and a content of each of the service information. Information transmission system.