JP3005489B2 - Mobile phone alarm - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable telephone alarm device which issues a warning when a transmission radio wave from a portable telephone is sensed.

[0002]

2. Description of the Related Art A cellular phone is called a cellular system together with a car phone, and its communication service area is divided into areas called cells. A base station is installed for each cell, and a frequency channel is allocated. Also,
The base station is automatically switched so that the call can be continued even if the caller moves between cells during the call. In addition, the PH having the simplified type of the above-mentioned mobile phone
Each base station of the S (Personal Handyphone System) has a service area of a microcell configuration smaller than the cell of the mobile phone, and the service area is about several hundred meters. Such a mobile phone and its simplified PHS are both small and lightweight, and can be used anywhere in a geographical area where they can communicate with their communication base stations. Are likely to be more likely to be affected.

[0003]

A conventional portable telephone emits various frequencies by the transmitted radio waves. In particular, with the increase in the number of lines in recent years, it is expected that wavelengths that have not been used conventionally will be used. In addition, various considerations have been given to various types of disturbance radio waves for medical equipment and aircraft operating equipment as measures against malfunctions. The effect of no radio waves is also conceivable. The present invention has been made in view of such circumstances, and has as its object to provide a mobile phone alarm device that detects a radio wave emitted by a mobile phone and issues a warning to the user based on the detected radio wave. And

[0004]

According to the first aspect of the present invention,
An antenna for receiving radio waves transmitted from the mobile telephone, a radio portion for performing only demodulation of the transmission radio wave received by the antenna, and a control unit for discriminating the intensity of the signal demodulated by the radio section, said control A mobile phone alarm device comprising: a display unit that displays a warning in accordance with the result of the determination of the unit; and a speaker that issues an audio warning in accordance with the result of the determination by the control unit. According to a second aspect of the present invention, in the mobile phone alarm device according to the first aspect, the control unit stores therein a reference value of the signal strength, and sets the strength of the received signal as the reference value. A distinction is made by comparison. According to a third aspect of the present invention, in the mobile phone alarm device according to the second aspect, the control unit corrects and updates the reference value of the signal strength at any time according to a surrounding radio wave condition. I have.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A portable telephone alarm device according to one embodiment of the present invention will be described below with reference to the drawings. FIG.
FIG. 2 is a schematic diagram of a mobile phone alarm device according to the embodiment, and FIG. 2 is a schematic diagram of a mobile phone and a mobile phone base station that communicates with the mobile phone. Here, reference numeral 1 is an antenna for receiving a transmission radio wave from a mobile phone, reference numeral 2 is a radio unit for demodulating the transmission radio wave, reference numeral 3 is a control unit for determining the intensity of the demodulated radio wave, Reference numeral 4 denotes the control unit 3
Is a warning light that lights up while rotating when it is determined that the received radio wave is emitted from the mobile phone. Code 5
Is a warning message generation unit that generates a warning message that is generated by voice at the same time that the warning light 4 is turned on when the control unit 3 determines that the received radio wave is transmitted from the mobile phone in the same manner as described above. . Reference numeral 6 denotes a speaker that outputs a sound generated by the warning message generator 5. Reference numeral 8 denotes a main body of the mobile phone, reference numeral 7 denotes an antenna of the mobile phone 8 for transmitting and receiving radio waves, and reference numeral 10 denotes a wireless base station installed in a cell where a service of the mobile phone 8 is provided. , 9 denotes a base station 10 for transmitting and receiving radio waves.
Antenna.

FIG. 3 is an external perspective view of the portable telephone alarm device of the present embodiment. Here, reference numeral 11 denotes
It is a housing | casing of the mobile telephone alarm device of this invention. In the embodiment of the present drawing, a warning light 4 and an antenna 1 are integrally mounted on a housing 11 in which a speaker 6 is embedded and a radio unit 2, a control unit 3, and a warning message generation unit 5 are built. ing.

Next, the operation of the portable telephone alarm device according to the present embodiment will be described with reference to the flowchart of FIG.
First, at the beginning of the processing when the power is turned on, step S
In 1, the control unit 3 creates a value called a frequency band scan reference value and holds the value inside the control unit. This is a reference value for comparing the relative intensities of the received radio waves in later processing, and when there is an input radio wave that is sufficiently larger than this frequency band scan reference value, It is used to determine that the mobile phone is present near the mobile phone alarm device. In the actual setting of the frequency band scan reference value, immediately after the power is turned on, the intensity of the surrounding radio wave received through the antenna 1 is taken as an initial value. If there is a mobile phone in the vicinity during the initial setting, a high value is set as the frequency band scan reference value, but when the call is finished, the radio wave intensity drops, so The control unit 3 resets the lowered low value again as the frequency band scan reference value.

Next, in step S2, the portable telephone alarm device scans all frequency bands in the upward direction, that is, from the portable telephone to the portable telephone base station. As a specific example, when the mobile phone 8 receives a signal, the base station 10 transmits a signal for calling the mobile phone 8 from the antenna 9, the antenna 7 receives the signal, and the mobile phone 8 responds to the radio wave. Is transmitted from the antenna 7. This radio wave is received by the antenna 1 of the mobile phone alarm device and demodulated by the radio unit 2. Thereafter, in step 3, the control unit 3
Compares the intensity of the demodulated radio wave with the above-described frequency band scan reference value, and determines whether the difference is equal to or greater than a predetermined value. As a result of the comparison, if the difference is less than the predetermined value, the process proceeds to step S8, where a new frequency band scan reference value that reflects the intensity of the received and demodulated radio wave is obtained by calculation. As a result, after updating the frequency band scan reference value held in the control unit 3, the process proceeds to step S2.
And continue the frequency band scan.

If it is determined in step S3 that the difference between the radio wave intensities is equal to or greater than a predetermined value, it is determined that the mobile phone that is making a call is present around the mobile phone alarm device. Then, the process proceeds to step S4. here,
An alert is issued to the mobile phone during a call. Specifically, the warning light 4 is rotated / lit to give a visual warning, and at the same time, a message is played from the speaker 6 and the warning is also given by voice. This warning operation is continued until an end operation is performed in the following. Subsequently, in step S5, the frequency band scan is performed again, and in step S6, the above-mentioned frequency band scan reference value is compared with the radio field intensity.
If the difference is equal to or larger than the predetermined value, the process returns to step S5, and the frequency band scan is continued. This step S6
If the difference is smaller than the predetermined value, the process proceeds to step S7, and the warning operation started in step S4 is stopped here. After completing a series of processes, the process returns to step S2.

[0010]

As described above, according to the portable telephone alarm device of the present invention, the following effects can be obtained. 1. In places where you want to restrict the use of mobile phones, such as in hospitals and airplanes, detect radio waves emitted by mobile phones,
A warning can be automatically issued to the user of the mobile phone by a warning light and a sound. 2. By installing near the precision equipment, it is possible to eliminate the possibility that the mobile phone during a call may affect the precision equipment.

[Brief description of the drawings]

FIG. 1 is a block diagram of a mobile phone alarm device according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a mobile phone and a mobile phone base station communicating therewith.

FIG. 3 is an external perspective view of a mobile phone alarm device according to an embodiment of the present invention.

FIG. 4 is a flowchart showing an operation of the mobile phone alarm device according to one embodiment of the present invention.

[Explanation of symbols]

 1, 7, 9 antenna, 2 radio unit, 3 control unit, 4 warning light, 5 warning message generation unit, 6 speaker, 8 mobile phone, 10 base station, 11 housing

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G08B 25/10 H04B 7/26 H04B 17/00

Claims (3)

(57) [Claims] And 1. A antenna for receiving radio waves transmitted from the mobile phone, control of performing a radio unit that performs only demodulation of the transmission radio wave received by the antenna, the determination of the intensity of the signal demodulated by the radio section A mobile phone alarm device, comprising: a display unit that displays a warning in accordance with the result of the determination by the control unit; and a speaker that issues an audio warning in accordance with the result of the determination by the control unit. 2. The apparatus according to claim 1, wherein the control unit stores a reference value of the signal strength therein, and performs the determination by comparing the strength of the received signal with the reference value. 2. The mobile phone alarm device according to 1. 3. The mobile phone alarm device according to claim 2, wherein the control unit corrects and updates the reference value of the signal strength as needed according to the surrounding radio wave condition.