JP2008225874A - Portable communication terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that since a conventional fire alarm is configured of main parts such as a sensing part, a power source part, a control part and a warning part as a single body, it is difficult to reduce costs, and it is impossible to get any application function such as notification. <P>SOLUTION: A notification function for issuing warning of a fire to a portable communication terminal communicatively connected through a radio line is integrated so that a power source part, a control part 6, and a warning part can be shared, and that costs can be reduced. Also, a communication function is used so that such an application function as notification can be utilized. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a portable communication terminal which incorporates a notification function for alarming a fire and executes a fire notification function together with an application function including a communication function.

  Fire alarms are installed in various buildings and facilities such as houses and offices, enabling early detection of fire. In addition, measures have been taken to prevent the spread of damage by early detection of fire, such as the mandatory installation of fire alarms in the bedrooms and stairs of ordinary houses since June 1, 2006.

  Conventionally, there is one described in Patent Document 1 as a fire alarm that is compact and easy to install. This fire alarm is designed to be compact by incorporating all of the main components of the alarm, the sensing unit, power supply unit, control unit, and alarm unit into one plate.

Japanese Patent Laid-Open No. 9-44767

  Conventional fire alarms constitute fire alarms alone, and it is difficult to reduce costs, and application functions such as notification cannot be obtained.

  The present invention has been made in view of such a conventional problem, and by incorporating a notification function for alarming a fire into a portable communication terminal capable of communicating via a wireless line, cost reduction and notification etc. An object of the present invention is to obtain a portable communication terminal having a fire alarm function capable of realizing the application function.

  A mobile communication terminal according to the present invention is a mobile communication terminal capable of communicating via a wireless line, and is provided in the vicinity of an opening provided in a housing that houses a main body, and a light projecting element and a light receiving shaft that emit light The smoke detection means comprising a light receiving element provided by shifting the light from the optical axis of the light projecting element, application functions including a communication function are executed, and a fire is determined based on an output signal from the light receiving element of the smoke detection means. The control unit is composed of a notification unit that warns of a fire when the control unit determines that a fire has occurred.

  According to the present invention, by incorporating the fire alarm function in the mobile communication terminal, the main components of the fire alarm can be shared with the components of the mobile communication terminal, and the cost can be reduced. There is an effect that the function can be realized.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram of a mobile phone as a mobile communication terminal according to an embodiment of the present invention. 1 is for receiving a radio frequency radio signal from a base station and transmitting a radio frequency radio signal to the base station. An antenna 2 is a duplexer for sharing the antenna 1 for transmission and reception, and 3 is a receiving unit for inputting a high-frequency signal received by the antenna 1 via the duplexer 2, and the high-frequency signal and the synthesizer 4 By mixing with the local oscillation frequency to oscillate, it is converted into an intermediate frequency signal. The transmitter 5 converts the transmission signal into a high-frequency signal by mixing it with a local oscillation frequency oscillated by the synthesizer 4, and the high-frequency signal is wirelessly transmitted from the antenna 1 to the base station via the duplexer 2. Sent.

  Reference numeral 6 denotes a control unit that controls each unit of the mobile phone, and executes processing according to a program stored in the ROM 7. Reference numeral 8 denotes a RAM for writing and reading data when the control unit 6 executes processing according to a program, and 9 is an acoustic control unit for processing an audio signal, to which a speaker 10 and a microphone 11 are connected. A display control unit 12 displays a video signal input from the control unit 6 on the LCD 13. Reference numeral 14 denotes a fire sensor for detecting a fire provided in the vicinity of a sound hole of a speaker for notifying an incoming call, and a specific configuration is shown in FIG.

  FIG. 2 is a block diagram showing a schematic configuration of the fire sensor, which includes a light projecting element 16 such as a light emitting diode and a light receiving element 17 such as a photodiode provided in a dark box 15. The light receiving element 17 is arranged with its light receiving axis shifted from the optical axis of the light projecting element 16. The detection signal of the light receiving element 17 is used as a signal for determining the presence or absence of a fire, and the determination is performed by the control unit 6. That is, as will be described later, the control unit 6 determines the presence or absence of a fire based on the detection signal from the light receiving element 17 and the time-up signal of the timer 6a.

  Next, an outline of the operation of the mobile phone will be described with reference to FIG. A high-frequency audio signal received through the antenna 1 and the duplexer 2 is converted into an intermediate frequency signal that can be easily processed by the control unit 6 in the receiving unit 3 and then input to the acoustic control unit 9 through the control unit 5. . The sound control unit 9 transmits a sound signal to the speaker, and is subjected to electric-sound conversion and output as sound. On the other hand, the voice collected by the microphone 11 is voice-electrically converted by the microphone 11 and transmitted to the acoustic control unit 9. The audio signal transmitted to the acoustic control unit 9 is input to the transmission unit 5 via the control unit 6. The audio signal is converted into a high-frequency signal to be wirelessly transmitted by the transmission unit 5 and wirelessly transmitted via the duplexer 2 and the antenna 1. The LCD 13 displays a processing status of the control unit 6 and an operation of an operation unit (not shown), and displays an image signal input via the display control unit 12.

  By the way, the mobile phone is equipped with various functions in addition to the original call. The control unit 6 executes various application programs according to user operations. That is, the control unit 6 includes a CPU 61 and an application activation unit 62 as shown in FIG. 3, and the CPU 61 is connected to the fire sensor 14, the other sensors 18, the operation unit 19, and the like. The application activation unit 62 can access application programs such as FM radio, music player, moving image reproduction, GPS application, and fire alarm application stored in the ROM 7 to activate the program. When the CPU 61 receives an instruction for starting an application program from the fire sensor 14, the sensor 18, or the operation unit 19, the CPU 61 starts the application starting unit 62 and executes the application program stored in the ROM 7.

  Hereinafter, the operation of starting the fire alarm application by the fire sensor 14 will be described.

  The CPU 61 inputs a detection signal from the light receiving element 17 of the fire sensor 14. As described above, since the light receiving element 17 is arranged with its light receiving axis shifted from the optical axis of the light projecting element 16, the normal detection signal is at a zero level. However, when a fire occurs and smoke flows into the dark box 15, the light projected from the light projecting element 16 is diffusely reflected by the smoke that flows. The irregularly reflected light is received by the light receiving element 17, and accordingly, the light receiving element 17 outputs a current as a detection signal to the CPU 61, and the CPU 61 detects the generation of smoke. In the detection signal of the light receiving element 17, the higher the smoke density, the more light from the light projection axis scatters, so the current increases.

  However, if the CPU 61 determines that a fire has occurred because the level of the detection signal has reached the predetermined level L1, the fire will be notified even if transient smoke such as cigarette smoke is detected, It is not preferable. FIG. 4 is a characteristic diagram in which the vertical axis indicates smoke density and the horizontal axis indicates time, and shows a case of transient smoke and a case of fire. In the case of transient smoke, the smoke concentration reaches L1, but does not reach L2, and falls below the L1 level as time passes. On the other hand, in the case of a fire, the time when the smoke concentration reaches L1 is quick and exceeds the smoke concentration L2.

  The CPU 61 uses the fire alarm application stored in the ROM 7 so as not to issue an alarm for transient smoke, but to reliably alarm the fire. Hereinafter, the processing of the CPU 61 accompanying the activation of the fire alarm application will be described based on the flowchart of FIG.

  When the fire alarm application is activated, the CPU 61 determines whether the smoke density L output from the light receiving element 17 is equal to or higher than a predetermined level L1 (ST1). If the smoke density L is below the predetermined level L1, the CPU 61 does nothing. If the smoke density L is greater than or equal to the predetermined level L1 in ST1, a timer is started in ST2. At this time, since the CPU 61 cannot determine whether the smoke is transient smoke or fire smoke, an alarm such as ringing cannot be issued, but an initial alarm that may cause a fire flashes on the LCD 13 or the like of the mobile phone. It may be displayed.

  Next, in ST3, it is determined whether the smoke density L output from the light receiving element 17 is equal to or higher than L2 higher than L1. If the smoke density L is greater than or equal to L2 in ST3, the CPU 61 determines that a fire has occurred and issues an alarm from the speaker 10 (ST4). If the smoke density L is less than or equal to L2 in ST3, it is determined in ST5 whether the specified time has elapsed since the timer activation, and if not, the process returns to ST3. On the other hand, if the specified time has elapsed since the timer activation in ST5, the process proceeds to ST6 to determine whether the smoke density L is equal to or higher than a predetermined level L1. If the smoke density L is less than or equal to the predetermined level L1 in ST6, the process is terminated, and if it is greater than or equal to L1, the process returns to ST2 to continue the process. As a result, according to this embodiment, the temporary smoke does not issue an alarm and can reliably alarm the fire.

  In the above embodiment, since a function for notifying a fire is incorporated into a mobile phone, it is carried in the daytime and used as an original phone. Therefore, the fire alarm application may be automatically activated only at night. Moreover, it is good also as what is started by operating an operation part when a user needs.

  In the above embodiment, only an alarm is notified when a fire is detected. However, a fire detection may be transmitted to a preset address by e-mail when a fire is detected. Furthermore, a telephone call may be made to a preset destination to report the occurrence of a fire. For example, the mobile communication terminal according to the present invention may be installed on the second floor of a residence, and a call may be made to a landline or mobile phone installed on the first floor when a fire is detected.

  The present invention can be added as an application function to a mobile communication device such as a mobile phone.

1 is a block diagram showing a configuration of a mobile phone according to an embodiment of the present invention. It is the block diagram which showed the structure of the outline | summary of the fire sensor which concerns on embodiment of this invention. It is the block diagram which showed the waist | hip | lumbar part of the mobile telephone which concerns on embodiment of this invention. It is the characteristic figure which showed the change of the smoke density in the case of a transient smoke and a fire. It is a flowchart for demonstrating operation | movement of the fire alarm application which concerns on this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Antenna 3 Receiving part 5 Transmitting part 6 Control part 14 Fire sensor 16 Light projecting element 17 Light receiving element

Claims (4)

A mobile communication terminal capable of communicating via a wireless line,
A smoke detection means comprising a light projecting element that is provided in the vicinity of an opening provided in a housing that accommodates the main body, and a light receiving element provided by shifting the light receiving axis and the light receiving axis of the light projecting element;
A control unit that executes an application function including a communication function and determines a fire based on an output signal from the light receiving element of the smoke detecting unit,
A portable communication terminal comprising a notification means for alarming a fire when the control unit determines that a fire has occurred. 2. The mobile communication terminal according to claim 1, wherein the mobile communication terminal is configured to send a preset content to a predetermined destination by e-mail or make a telephone call in conjunction with the determination by the control unit as a fire. 2. The mobile communication terminal according to claim 1, wherein the opening is a sound hole of a speaker that notifies an incoming call. The control unit determines that a fire has occurred when the output signal level L of the light receiving element reaches a second threshold value L2 higher than the first threshold value L1 within a predetermined time after the first threshold value L1 is exceeded. The mobile communication terminal according to claim 1.

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