WO2000021222A1

WO2000021222A1 - Device for detecting power-on of portable phone and warning device

Info

Publication number: WO2000021222A1
Application number: PCT/JP1999/005515
Authority: WO
Inventors: Isamu Nagano; Kozo Hashimoto; Satoshi Yagitani; Norio Fukuhisa
Original assignee: Nisshin Sangyo Co., Ltd.; Kagaku Gijutsu Shinko Jigyodan
Priority date: 1998-10-07
Filing date: 1999-10-07
Publication date: 2000-04-13
Also published as: AU6004199A

Abstract

A detecting device and a warning device for preventing a portable phone whose power is on from being carried in a place where the portable phone is susceptible to radio wave interference. The device of the invention comprises a test ID transmitter (4) for transmitting a dummy signal for altering or erasing a base-station ID stored in the portable phone, an antenna (2) for receiving the radio wave of communication band of the portable phone, level sensing means (9, 10) for measuring the level of the received radio wave, and means (12, 13) for outputting detection signals a and b when the received wave exceeds a predetermined level. A portable phone in a narrow sense transmits a radio wave when an ID radio wave of greater intensity is received or when the portable phone loses the base-station ID having been stored therein. Contrarily, a PHS transmits a radio wave even while the user is not talking over the PHS. Since a transmitter for transmitting a dummy radio wave is provided, the portable phone in a narrow sense forcedly transmits a radio wave for connection confirmation. When the strength of the received radio wave is greater than a preset strength, it is judged that a portable phone (in a wide sense) whose power is on is present.

Description

Details

Power supply state detection device and warning device for mobile phone

The present invention relates to a device that detects that a mobile phone is brought into a facility or place, such as a hospital or an aircraft, which is susceptible to radio interference while being powered on, and outputs a warning message and a warning signal as necessary. Things. Background art

Hospitals and aircraft are equipped with sophisticated electronics that are susceptible to interference from noise radio waves. Failure of these electronic devices can cause serious accidents. In facilities and places equipped with such electronic devices, it is necessary to avoid bringing mobile phones into the facilities and places with the power on. Therefore, at these facilities and locations, for example, put a message on the entrance of the hospital or broadcast a message requesting that the mobile phone be turned off in a hospital lobby or on an airplane. It is prevented from being brought in while it is in the on state.

However, since mobile phones are small, it is not possible to recognize whether or not they have a mobile phone from their appearance. In addition, as mobile phones have become widespread and the number of owners has increased significantly, awareness of having mobile phones has been decreasing. Furthermore, as mobile phones become more widely owned, many people overlook or ignore warnings due to carelessness or low awareness of radio interference. Are more likely to be brought to hospital rooms and aircraft. In such a case, if a mobile phone is used near a doctor, nurse, or crew member, or a call is received from another person and the ring tone sounds, those concerned turn off the mobile phone. However, in places where there is no such stakeholder, mobile phones may be used unknowingly or due to low awareness of radio interference. It becomes difficult to avoid such situations.

Thus, the present invention detects that a person passing through a passage or gate has a mobile phone in a power-on state, and can issue a warning or forcibly turn off the mobile phone. Therefore, an object of the present invention is to provide a detection device and a warning device for detecting a power-on state of a mobile phone. Disclosure of the invention

The power-on state detection device for a mobile phone according to the present invention includes a test ID transmitter 4 for transmitting a dummy signal for changing or deleting the base station ID stored in the mobile phone, and a radio wave of a communication band of the mobile phone. It comprises a receiving antenna 2, level detecting means 9 and 10 for a received radio wave, and means 12 and 13 for outputting detection signals a and b when the received radio wave exceeds a predetermined level.

The test ID transmitter 4 and the receiving antenna 2 should be provided in a passage or gate 1 provided with a radio shielding wall or a radio shielding door. By adopting this means, it is possible to prevent the intensity of the dummy radio wave from becoming excessive, and to avoid the occurrence of radio interference due to the dummy radio wave. In some cases, instead of providing a radio wave shielding wall or radio wave shielding door, a jamming radio wave may be transmitted to a passage or gate, and a test ID transmitter may be installed at a boundary position away from the area where the radio wave reaches. it can. When performing signal processing in analog, the level detection means 9 and 10 of the received radio wave and the output means 12 and 13 of the detection signal are used by mobile phones of each system including PHS It is preferable to provide a plurality of series in parallel corresponding to the frequency of the communication band to be used. Furthermore, a local oscillator 6 can be provided between the receiving antenna 2 and the level detectors 9 and 10 to reduce the frequency of the received radio wave by superimposing it on the received radio wave.

When performing signal processing digitally, a local oscillator that outputs sine waves with different phases, A / D converters for each signal modulated with a different sine wave, and a digital signal processor are provided. The digital signal processing unit processes the level detection and output of the detection signal by software.

By employing these means, the accuracy and stability of detection can be improved, and the cost of the apparatus can be reduced.

When the power-on state of the mobile phone is detected, a warning message is broadcasted through the speaker or the mobile phone outputs a ring tone to warn the user. The former warning device includes a power-on state detection device provided with the above-described means, a storage device 15 for storing or not storing a warning message, and a speaker 3 for generating the message, and a comparator 1 of the detection device. When the detection signals a and b are output from the terminals 2 and 13, the message storage or the corresponding message of the synthesizing device is output to the speaker driver 17.

In addition, the latter warning device includes a power-on state detection device having the above-described means, terminal ID recognition means 25 and 26 included in a received signal, and a terminal calling device that calls a terminal based on the recognized ID. 27, and can be realized by operating the terminal calling device when the detection signals a and b are output from the detection device. The warning message in this case should be transmitted to the terminal or output from a separately provided speaker.

If necessary, it is technically possible to send a signal for forcibly turning off the power of the mobile phone using the detection signals a and b.

Mobile phones are broadly divided into narrowly defined mobile phones (CDMs) that enable calls even during high-speed movement. A, PDC, cellular, etc.) and PHS with a short radio wave range. A mobile phone in a narrow sense does not emit radio waves except during a call when receiving ID radio waves transmitted from a base station (when in an area where calls can be made through the base station). When a stronger ID radio wave is received or the stored base station ID is lost, a radio wave for base station change or connection confirmation is transmitted. The PHS, on the other hand, periodically checks radio waves at short intervals to check the connection even when not in use.

Therefore, if only the PHS in the power-on state is to be detected, it is sufficient to receive the radio wave in the communication band of the PHS and detect whether or not the intensity is equal to or higher than a predetermined value. However, mobile phones in the narrow sense do not emit radio waves unless they are in a call when in a communicable area, so radio waves are not emitted simply when the power is on, so it is possible to detect this. Can not.

According to the present invention, a mobile phone in a narrow sense passing through the passage or the gate by providing a transmitter of a dummy radio wave in a passage or a gate such as a guideway to a hospital entrance or a boarding gate of an aircraft, for example. Forcing the device to receive a fake ID radio wave stronger than the original ID radio wave or to receive a radio wave that erases the ID of the base station and forcibly transmit a radio wave for confirming the connection. Transmission of the connection confirmation radio wave is performed when entering the passage or gate (when receiving the dummy radio wave) and when passing (when the dummy radio wave disappears and returns to the original ID radio wave reception state), The receiving antenna 2 for receiving the communication radio wave may be provided inside the passage or inside the gate 1, or may be provided at a position after passing through.

In an area where the original ID radio wave intensity is extremely small, it is easy to transmit a dummy radio wave that is strong enough to cause the mobile phone to transmit the connection confirmation radio wave. Transmitting radio waves may itself cause problems. In such a case, a passage or game Provide a wall or door that is shielded from electromagnetic waves to reduce the strength of the original ID radio wave and increase the strength of the dummy radio wave relatively.

A reception antenna 2 for receiving radio waves in the PHS communication band and in the narrow-band communication band of a mobile phone is provided in a passage or gate provided with such a transmitter for a radio wave, and signals of these frequencies are received. By amplifying, it is possible to detect both the mobile phone and the PHS in a narrow sense in the power-on state passing through the passage or the gate.

The signal received by the receiving antenna 2 is amplified by the amplifiers 7 and 8, and then compared with the set intensity set by the comparators 12 and 13. It determines that there is a mobile phone in a state (in a broad sense) and outputs detection signals a and b. Since the band used by the mobile phone has a very high frequency and signal processing is difficult, the signal received by the receiving antenna 2 is multiplied by a signal of a similar frequency generated by the local oscillator 6 to obtain By generating a low-frequency signal based on the difference, amplifying the signal at that frequency with an intermediate-frequency amplifier, and comparing it with the set intensity, it is possible to stabilize operation and reduce equipment costs. it can.

When the presence of a powered-on (broadly defined) mobile phone is detected by the above means, a warning message is broadcast to instruct the mobile phone holder to turn off the power. If more rigorous processing is required, a staff member is assigned to confirm that the power has been turned off, or the power is forcibly turned off by remote control.

Also, when transmitting a signal, the mobile phone transmits the terminal ID of the mobile phone at the same time, so it recognizes the terminal ID of the received signal and calls the mobile phone whose connection has been confirmed from the dummy base station. Is possible. As a result, a message asking the user to turn off the mobile phone can be individually transmitted to the person who has the mobile phone. In addition, sounding a ring tone on the mobile phone can alert the owner who has forgotten that the mobile phone is turned on. In this case, it is desirable to minimize the output of the transmitted radio wave in order to avoid radio interference caused by transmitting the warning signal to each mobile phone as much as possible. As a result, the range of the radio waves can be very short (for example, about 3 meters). At such a short range, even if the person walks at a speed, the owner moves out of the range of the radio wave while listening to the incoming call sound and performing the incoming call operation, making it impossible to warn. . This problem can be solved by arranging a plurality of transmitting antennas 19 at intervals commensurate with the reach of radio waves along the direction of movement of people in a passage or gate. The signals sent to the multiple transmitting antennas are the same signal, and are signals output from one terminal call / message transmission circuit.

Also, a message requesting a power-off of a mobile phone without generating a message but merely generating a ringtone can be output from the speaker 3. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a block diagram showing a first embodiment of the present invention, in which a warning message is broadcast by a speaker. FIG. 2 is a block diagram showing a second embodiment of the present invention, in which a terminal ID is recognized and a warning message is transmitted to a mobile phone holder. FIG. 3 is a block diagram showing a third embodiment of the present invention, showing an example in which functions similar to those in FIG. 2 are realized by digital signal processing. In the figure, reference numeral 1 is a shield gate, 2 is a receiving antenna, 3 is a spin force, 4 is a test ID transmitter, a and b are detection signals, and 19 is a transmitting antenna. BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 1 is an explanatory diagram showing a first embodiment of the present invention. Hospital entrance and aircraft A dummy radio wave in the frequency range emitted by the base station of a mobile phone in a narrow sense is sent to a passage or gate 1, which is an entrance or exit to places where carrying-in of mobile phones is prohibited, such as a passage connecting to the boarding gate. A test ID transmitter 4, a receiving antenna 2 for receiving radio waves in the communication band of PHS and mobile phones in a narrow sense, and a speaker 3 are provided.

The passage or gate 1 may have a shield structure for blocking ID radio waves transmitted from the base station. The shield structure can be realized by, for example, making the glass of the door netted glass or finishing the walls of the passage with interior materials with wire mesh. A passage to the boarding gate of an aircraft can be realized by making the wall surrounding the passage a metal peripheral wall. If the passage is a tunnel of some length, its entrance may be left open.

The radio wave received by the receiving antenna 2 provided in the passage or gate 1 is amplified by the wideband amplifier 5 and then superimposed with the high frequency output from the local oscillator 6 and converted to an intermediate frequency suitable for processing such as amplification. Is done. The obtained intermediate frequency signals are selectively amplified by the intermediate frequency amplifiers 7 and 8 corresponding to the mobile phone frequency band and the PHS frequency band in a narrow sense, respectively. Is detected by the level detectors 9 and 10.

On the other hand, the detection level setting unit 11 sets the detection level of each radio wave corresponding to the frequency band of the mobile phone in the narrow sense and the frequency band of the PHS, respectively. The intensity of the detected radio wave is compared with the detection level set in the digital keypad 11 by the comparators 12 and 13.When the level of the detected radio wave is high, the comparators 12 and 13 detect the detection signal a. And b.

In this way, it is detected that the mobile phone in the power-on state is passing through the passage or gate 1 which is the detection target area. In the embodiment of FIG. 1, the warning signals stored in the message memory 15 are sped up by the detection signals a and b. Output to force 3. That is, the message selection transfer circuit 16 is turned on by the detection signals a and b, and the message stored in the message memory 15 is sent to the speaker 3 via the low-frequency amplifier 17. The message may say, for example, "Your mobile phone is turned on. Turn it off in hospitals (or airplanes)." .

To detect and compare the level of the received radio wave, simply detect the strength of the amplified electric signal to detect whether or not the level exceeds a certain level. However, a DSP (digital signal processor), By using the neural network technology, it is possible to provide a learning function for level detection and to perform detection with higher accuracy.

In the above-described embodiment, an example has been described in which a mobile phone in a powered-on state passing through a set passage or gate is detected, and a predetermined message is broadcast based on the detection signal. It is technically possible to have the person turn off the power by paying direct attention, or to forcibly turn off the power by sending a power cutoff radio wave.

The test ID transmitter 4 may be a device that constantly emits a dummy radio wave.However, for example, in a passage with little traffic, a human sensor 18 is provided when a person passes through the passage or gate. Only a single radio wave may be transmitted. At hospital entrances that have automatic doors, it is possible to operate the test ID transmitter with a signal from a sensor that automatically opens and closes the door.

FIG. 2 is a diagram showing a second embodiment of the present invention. When a mobile phone in a power-on state is detected, a warning message is directly transmitted to a mobile phone who has called the mobile phone and performed an incoming call operation. It is something to do. Hereinafter, only portions different from the first embodiment will be described. Intermediate frequency amplifier provided in the level detection circuit of PHS and mobile phones in a narrow sense 7,

The intermediate frequency is superimposed on the output of 8 by the second-stage local oscillators 21 and 22 to obtain a frequency suitable for signal analysis, amplified by amplifiers 23 and 24, and detected and demodulated. Circuit circuit 25. When transmitting a radio wave, a mobile phone outputs a terminal ID signal so that the receiver can recognize the transmission destination. The detection / demodulation / decoding circuit restores the input signal to a signal before modulation and sends it to the terminal ID recognition circuit 26. The terminal ID recognition circuit 26 reads the terminal ID of the mobile phone that transmitted the radio wave from the input signal, and calls the terminal ID and outputs it to the message transmission circuit 27.

The message memory 15 stores a message to be transmitted to a speaker or a mobile phone. The selective transfer circuit 16 switches the message transfer destination to the speaker 3 or the terminal according to the operation of the switching switch during operation and the output frequency of the detection signals a and b from the comparators 12 and 13. Switch to 27. When a person carrying a powered-on mobile phone passes through the shield gate 1, the mobile phone sends a radio wave to confirm the connection. This radio wave is received by the reception antenna 2, and if the signal level is equal to or higher than the set value, the detection signals a and b are sent from the comparators 12 and 13 to the selective transfer circuit 16. On the other hand, the terminal ID read from the received radio wave is sent to the terminal call / message transmission circuit 27. Then, the selective transfer circuit 16 sends an operation command and a message to the terminal call / message transmission circuit 27, and the terminal call / message transmission circuit 27 receives the terminal ID received from the terminal ID recognition circuit 26 based on the terminal ID. Make a phone call and send a message requesting that the mobile phone be turned off.

Terminal calling-The signal of the message transmission circuit 27 is simultaneously transmitted from a plurality of transmission antennas 19 arranged at predetermined intervals in the passage or gate 1, and the mobile phone in the power-on state passes through the area where the transmission antenna 19 is arranged. Since the warning signal continues to be received while moving, the warning message can be transmitted to the owner who performed the incoming call operation during that time. When the detection signals a and b are output from the comparators 12 and 13 at a high frequency, the selective transfer circuit 16 sends the message in the message memory 15 to the speaker 3 and sends the message to all the members. Note that terminal ID recognition can be performed in a short period of time, so by providing a plurality of terminal call and message transmission circuits 27, if the detection signals a and b are output at a high frequency, It is also possible to send messages directly to individual telephones.

FIG. 3 shows a third embodiment of the present invention, and shows an example in which a mobile phone is detected and a terminal ID is recognized by digital processing. In this example, the received radio wave amplified by the broadband amplifier 5 is divided into two, and the sine wave of the local oscillator 6 is added to one of the two, and the cosine wave is added to the other to obtain a base band or a low frequency close to this. A quadrature frequency conversion is performed, and each is converted to a digital signal by A / D converters 33, 3 4 through low-pass filters 31, 32. The two digital signals obtained in this manner are input to a digital signal processing unit 36 centered on a DSP (Digital Signal Processor) 35, and are subjected to predetermined arithmetic processing, whereby the difference signal between the two input signals is obtained. Information contained in received radio waves and its intensity can be detected.

Therefore, the digital signal processing unit 36 performs the same processing as in the above-described embodiment, that is, the detection of the signal level of the communication band of the PHS or the mobile phone in a narrow sense, the comparison of the detected signal level with the set value, and the transmission method of the mobile phone. The second execution is performed by executing the corresponding decoding processing and terminal ID recognition processing, and outputting the obtained detection signals a and b and the terminal ID to the selective transfer circuit 16 and the terminal call / message transmission circuit 27. The same detection and warning processing as described in the example can be performed.

Furthermore, according to the third embodiment in which the received radio wave is detected by digital processing, the processing program registered in the digital signal processing unit 36 can be changed to flexibly change or diversify the transmission method of the telephone. Can respond. Industrial applicability

By installing the power-on state detection device for a mobile phone of the present invention at, for example, the entrance of a sick person or the boarding gate of an aircraft, it is possible to detect that the mobile phone in the power-on state is brought into a hospital or an aircraft, and Action can be taken. In addition, the warning device of the present invention can automatically issue a warning to a person who attempts to bring a mobile phone into a hospital or an aircraft while the power is on, and turn off the power. Therefore, by using the device of the present invention in a place where disturbance due to transmission or reception of a mobile phone is disturbed, occurrence of a failure due to a radio wave can be prevented beforehand, and safe operation of the facility can be achieved.

Claims

Range of blue demand

1. A test ID transmitter that transmits a dummy signal of the base station ID of the mobile phone, a receiving antenna for the radio wave in the communication band of the mobile phone, an amplifier of the received radio wave, a level detecting means of the received radio wave, and the received radio wave. Means for outputting a detection signal when a level exceeds a set level.

2. The power supply for a mobile phone according to claim 1, wherein the test ID transmitter (4) and the receiving antenna (2) are provided in a radio wave shielding wall or a passage or a gate having a radio wave shielding door. On-state detector.

3. A plurality of received radio wave level detection means and detection signal output means are provided in parallel in correspondence with the frequencies of a plurality of communication bands used by the mobile phone, and the reception is performed between the reception antenna and the level detection means. 3. The power-on state detection device for a mobile phone according to claim 1, further comprising a local oscillator that reduces a frequency of a received radio wave by superimposing the received radio wave on a radio wave.

4. A local oscillator that outputs sine waves with different phases, an A / D converter for each signal modulated with a different sine wave, and a digital signal processor are provided. 3. The power-on state detection device for a mobile phone according to claim 1, further comprising a detection unit, and a unit that outputs a detection signal when a received radio wave exceeds a set level.

5. The mobile phone power-on state detecting device according to claim 1, 2, 3, or 4, Notification means for storing or synthesizing the notification message, a speaker, and a transfer means for transmitting the warning message at the above-mentioned speed. When the detection signal is output from the power-on state detecting device, the message is stored or synthesized. A power-on state warning device for a mobile phone, which outputs a message corresponding to the means to a speaker.

6. The power-on state detecting device for a mobile phone according to claim 1, 2, 3, or 4, a means for recognizing a terminal ID included in a received signal, and a terminal calling device for calling a terminal based on the recognized ID. A terminal calling device is operated when a detection signal is output from the power-on state detecting device.