JP6997902B1 - Mobile terminal in the event of a disaster - Google Patents

Abstract

PROBLEM TO BE SOLVED: To oscillate a specified frequency in a mobile terminal buried in a debris flow or an avalanche. SOLUTION: When a mobile terminal such as a smartphone is equipped with a sensor for detecting a disaster and a person using the mobile terminal encounters a disaster such as a sudden landslide or an avalanche, the mobile terminal involved in the disaster at the same time. By detecting a sudden change in the radio wave condition, such as when a disaster is detected and the radio wave condition from the base station suddenly goes out of service due to being buried, even if the mobile terminal is destroyed, the oscillator built into the mobile terminal can be used. By transmitting the specified frequency, it is possible to find the burial site in a short time. [Selection diagram] Fig. 1

Description

The present invention contributes to rescue by transmitting an emergency distress signal to determine the burial place when a mobile terminal such as a smartphone is buried together with a user of the mobile terminal in a disaster such as a debris flow or an avalanche.

Due to the effects of global warming in recent years, landslide disasters occur every year not only in Japan but also around the world due to short-term heavy rains, and many people are often buried alive. If you go to a dangerous place as a profession or for unavoidable circumstances, attach a rescue transmitter to your helmet or wrist / ankle from the beginning, and even if it is buried, immediately detect the signal from the transmitter. It is possible to rescue. For example, in Patent Document 1, a plurality of oscillators are attached to a buried person in advance, and even if the buried person is buried alive, it is possible to rescue the buried person based on a signal from a transmitter.

Japanese Patent Laid-Open No. 2017-156221

Patent Document 1 describes that by equipping a buried person with a plurality of oscillators having different wavelengths in advance, the buried place can be accurately detected and rescued quickly by using a heavy machine or the like. In the case of being caught in a sudden debris flow in an environment where you normally live in a residential area, such as a landslide disaster, you should evacuate before the disaster occurs, as long as you install multiple oscillators in advance. It is possible, and it has not been proposed to use a familiar mobile terminal as an oscillator.

Therefore, an object of the present invention is that, unlike Patent Document 1, when a person who uses a mobile terminal close to him / her suddenly becomes a buried person, the mobile terminal is located in the clothes of the buried person or in a very close place. The main focus is on the mobile terminal becoming an oscillator on the premise of.

In the present invention, in order to solve the above problems, an independent oscillator is placed in a small case inside the mobile terminal, and in the event of a disaster such as a debris flow, the mobile terminal is described before it is destroyed. The oscillator automatically operates to transmit a constant frequency, which can be useful for subsequent rescue operations.

Furthermore, in the case of a waterproof mobile terminal, even if the LCD screen or case is broken, if the battery is running, power will be supplied to the oscillator for several days to several weeks until the battery is empty. , The chances of a buried person being found are high.

According to the present invention described above, in an environment where radio waves are normally used such as in a residential area, the most used mobile terminal has an oscillator that serves as an emergency distress signal, so that it can be used most in the event of a sudden disaster. It will be a highly useful oscillator.

It is a figure which shows the structure of the said portable terminal and the said oscillator of this invention. The functional block diagram of the oscillator of this invention is shown. It is a flow diagram which shows the determination of the control part at the time of standby of this invention.

FIG. 1 shows the configuration of the mobile terminal and the oscillator according to the present invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a functional block diagram when the oscillator 101 is built in a mobile terminal 100 such as a smartphone that is generally used. The battery 105 is a rechargeable high-capacity secondary battery called a lithium-ion battery, and is usually used for the mobile terminal. Therefore, the oscillator 101 is not supplied with power and is not operating except when it is determined that a disaster has occurred. That is, when the sensor unit 102 for disaster detection detects the occurrence of a disaster, the control unit 104 operates the drive unit 103, power is supplied from the battery 105 to the oscillator 101, and the oscillator 101 oscillates a specified frequency. Start sending to the outside.

FIG. 2 is a functional block diagram of the oscillator 200, and when power is supplied to the oscillation circuit 203, a specified frequency is automatically transmitted and radio waves are transmitted from the antenna 202. The oscillation circuit 203 and the battery for supplying power are both the built-in battery 205 built in the oscillator 200 and the battery 210 for the mobile terminal. In the unlikely event that the mobile terminal 100 is destroyed, the battery 210 When the built-in battery 205 becomes unusable, power is supplied from the built-in battery 205 to the oscillation circuit 203, and the oscillator 101 operates. The relay circuit 204 is a mechanical relay, and a type of relay that cannot be opened again once the relay is closed is desirable, but a semiconductor type relay is also possible in terms of space and cost. The relay circuit 204 is operated by a transistor-controlled relay operating circuit 207, the transistor is turned on, a current flows through the internal coil of the relay circuit 204, and the relay is closed. In the relay operating circuit 207, the drive unit 211 of the portable terminal 100 is supplied with power to the relay operating circuit 207 by the control unit 212, the relay circuit 204 is closed, and the built-in battery 205 and the battery 210 oscillate. Power the circuit 203. This is because the diode 215 isolates the built-in battery 205 and the battery 210.

It is desirable that the oscillation circuit 203 has a long low frequency wave that reaches the ground even when it is buried in earth and sand or an avalanche. Further, it is desirable that the transmitted radio wave is not a continuous output but a pulsed output, and the instantaneous transmission power is increased. Since the wavelength of the antenna 202 becomes longer when the oscillation circuit 203 becomes a long wave, the antenna 202 is thin and small, such as a spiral antenna designed with a vortex pattern on a thin flexible substrate in order to make the oscillator 200 compact. Antenna is desirable. Recently, radio wave technology has been developed that allows radio waves to reach the ground even if they are buried in earth and sand, so such technology may be introduced. The case 201 must be made of a non-metal material such as reinforced plastic that allows radio waves to pass through, and must have strength that does not break even when a large pressure is applied due to earth and stone currents. For example, the size of the case 201 is about several millimeters square. If so, the applied pressure will be small and the possibility of destruction is low. Terminals A208 and B209 are metal terminals embedded in the case 201, and usually have a structure in which they are contacted by pressure such as a spring pin. Even if the mobile terminal 100 is destroyed by the pressure of a debris flow or an avalanche, the metal Since the spring pin of the terminal is removed, no earth or sand or snow will enter the inside of the oscillator 200. Further, the oscillator 200 is used as a chip component to be soldered to the printed circuit board inside the portable terminal 100, and the case of the oscillator 200 is soldered to the printed circuit board to not only increase the strength but also to increase the strength of the case 201. By soldering the terminal A208, the terminal B209, and the terminal C213 attached to the printed circuit board to the printed circuit board, the possibility that the oscillator 200 will be destroyed even if a large external pressure is applied is reduced.

The sensor unit 102 detects a pressure sensor that detects pressure due to earth and sand or snow, a strain sensor that detects small strains, an AE sensor that detects cracks, peelings, and cracks in the cabinet of the mobile terminal 100, and cracks and breaks in metal. The sensor unit 102 detects an abnormality and the control unit 104 detects the abnormality by the time the mobile terminal 100 is destroyed by the earth and stone flow or the avalanche. By starting the power supply to the 101, the oscillator 200 starts transmitting the rescue signal.

When the power supply to the oscillation circuit 203 is continued from the battery 210 of the mobile terminal 100 to the oscillation circuit 203 via the terminal A208 of the oscillation unit 200 due to the destruction state of the mobile terminal 100 due to a landslide or an avalanche, the battery 210 Due to its high capacity, the oscillator 200 can continue to emit radio waves for several days to several weeks. If the battery 210 is severely damaged and destroyed, the power source of the oscillator 200 is only the built-in battery 205, so that there is little spontaneous discharge, and a high voltage and high capacity button-type small lithium ion. Batteries etc. are desirable.

Further, if the oscillator 200 is provided with an additional terminal C213 and the built-in battery 205 is charged from the battery 210 through the charging circuit 214 in a normal state, the built-in battery 205 is always in a fully charged state.

FIG. 3 is a flowchart showing the time history until the mobile terminal 100 is in the standby state and the control unit 212 determines that a disaster has occurred after a disaster has occurred. When the mobile terminal 100 is in the standby state, the interval of normal intermittent reception is a very long interval of several seconds in order to suppress the consumption of the battery 210. When the plurality of sensor units 102 detect a disaster, the radio waves from the base station are sampled at a very short interval of intermittent reception, for example, 50 mS. This assumes that debris flow and avalanche will rush at high speed like a debris flow and avalanche, and no matter how fast the debris flow and avalanche rush, the mobile terminal 100 will be buried in the earth and sand and destroyed, resulting in radio waves from the base station. Even if the radio wave condition suddenly changes from a good condition to an environment such as out of service area, if the sampling is as short as 50 mS, the sensor unit 102 detects a disaster and the control unit 212 detects the radio wave from the base station. The state can be determined and the oscillator 200 can be operated. It goes without saying that if the mobile terminal 100 is used by the user, the relay operating circuit 207 is turned on at any time because it is not an intermittent reception.

The present invention will be described with reference to examples. In the explanation, it is assumed that the user of the mobile terminal 100 is Mr. A, and Mr. A lives in a general wooden house in a residential area. The radio wave condition from the base station is very good, and the environment is such that three or four electric field strength antenna bars displayed on the display unit of the mobile terminal 100 are standing. Like many users, Mr. A operates the mobile terminal 100 in his room in the house to enjoy lines, calls, online shopping, games, or the mobile terminal 100 in his room. It may be charging, that is, in a standby state. Alternatively, the mobile terminal 100 may be put in a pocket or bag to prepare for going out. That is, it is very likely that the mobile terminal 100 is located in the vicinity of Mr. A.

In this state, if the slope of the back mountain suddenly becomes a debris flow and attacks Mr. A's house, it is very likely that Mr. A will be washed away with the house. As a result, it is presumed that the mobile terminal 100 in the vicinity of Mr. A is also swept away together with Mr. A. That is, the probability that the mobile terminal 100 exists in the vicinity of the position where Mr. A is buried is also very high.

The oscillator 101 inside the mobile terminal 100 has already pulsed a predetermined frequency that becomes a distress signal. If detailed information on the frequency is notified in advance by telecommunications carriers such as DoCoMo, AU, and Softbank to police, fire departments, the Ministry of Internal Affairs and Communications, local governments, and the Self-Defense Forces nationwide, the frequency will be reported at the same time as the disaster occurs. There is a possibility that Mr. A, who is a buried person, can be found by bringing a handy type receiver to the site to detect the minute frequency generated from the inside of a debris flow or an avalanche.

Of course, the purpose is to be rescued as a survivor, but in the current situation where there are many cases where the family is buried in a debris flow such as Hiroshima or Atami for more than a month and cannot respond to the wishes of the family to find out quickly. It is very important to find out as soon as possible, even if it is not alive, and the present invention can meet such expectations. Furthermore, when a debris flow occurs, the earth and sand are still in a fluid state, and characteristics such as diffraction by long waves and interference can be used, but over time, the earth and sand solidify into individuals, and the characteristics of long waves can be used. There is a possibility that it will disappear, and it is hoped that it will be rescued as soon as possible.

The above-mentioned invention is an oscillator for a mobile terminal that is indispensable for users who are widely used in the field where it is difficult to search for buried people each time a guerrilla rainstorm causes a debris flow due to the influence of global warming in recent years. By incorporating the above, it provides an inexpensive and efficient search tool. In the embodiment, a long wave radio wave is used as the notification means, but minute vibration or a sound such as a bell or a tuning fork may be used as the notification means.

100 Mobile terminal 101 Oscillator 102 Sensor unit 103 Drive unit 104 Control unit 105 Battery
200 Oscillator 201 Case 202 Antenna 203 Oscillator circuit 204 Relay circuit 205 Built-in battery
207 Relay operation circuit 208 terminal A 209 terminal B 210 Battery 211 Drive
212 Control unit 213 Terminal C 214 Charging circuit 215 Diode

Claims (1)

It is a mobile terminal that communicates with a base station, and the mobile terminal includes a burial detecting means for detecting the burial state of the mobile terminal and a notification means that operates when the burial detecting means is activated, and the burial detection is performed. The means is a mobile terminal characterized in that when the electric field strength of the radio wave received from the base station by the mobile terminal drops from a state of a predetermined value or more to a predetermined value or less within a predetermined time, it is detected as a buried state.

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