JP2023021504A - Mobile terminal under disaster - Google Patents

Abstract

To enable a mobile device buried in a debris flow or an avalanche to oscillate a specified frequency.SOLUTION: A mobile terminal such as a smartphone is equipped with a sensor for detecting a disaster. When a person using a mobile terminal encounters a disaster such as a mudslide or an avalanche that suddenly occurs, the mobile terminal involved in the disaster detects the disaster at the same time, and detects a sudden change in radio wave condition, for example, in a case that the radio wave condition from a base station suddenly gets out of range because the mobile terminal is buried, whereby it is possible to find a buried location in a short period of time by transmitting a specified frequency by an oscillator incorporated in the mobile terminal even when the mobile terminal is broken.SELECTED DRAWING: Figure 1

Description

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

Due to the effects of global warming in recent years, landslide disasters occur every year not only in Japan but all over the world due to short periods of heavy rain, and there are frequent cases where many people are buried alive. When going to a dangerous place as a job or due to unavoidable circumstances, attach a rescue transmitter to your helmet or wrists and ankles from the beginning, so that even if you are buried, the signal from the transmitter will be detected immediately. It is possible to help. For example, in Patent Document 1, a plurality of oscillators are attached to a buried subject in advance, and even if the buried subject is buried alive, it is possible to rescue the buried subject based on the signal from the transmitter.

JP 2017-156221

In Patent Document 1, it is described that by attaching a plurality of oscillators with different wavelengths to the buried person in advance, the buried place can be accurately detected and rescued quickly using heavy machinery etc., but Hiroshima and Atami. Like the landslide disaster in 2010, in the case of being caught in a sudden debris flow in an environment where you live normally in a residential area, as long as you install multiple oscillators in advance, you can evacuate before the disaster occurs. However, it has not been proposed to use familiar portable terminals as oscillators.

Therefore, it is an object of the present invention, which is different from Patent Document 1, that when a person who uses a mobile terminal nearby suddenly becomes a burial person, the mobile terminal is in the clothing of the burial person or in a very close place. Based on the premise, the focus is placed on the mobile terminal becoming an oscillator.

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

Furthermore, in the case of a waterproof type mobile terminal, even if the liquid crystal screen or the case is broken, if the battery is still running, power will be supplied to the oscillator for several days to several weeks until the battery becomes empty. , increasing the likelihood that the buried subject will be found.

According to the present invention described above, mobile terminals, which are most commonly used in environments with good radio wave conditions, such as residential areas, incorporate an oscillator that serves as a distress signal in an emergency. It becomes an oscillator with high utility value.

3 is a diagram showing the configurations of the mobile terminal and the oscillator of the present invention; FIG. Fig. 3 shows a functional block diagram of the oscillator of the present invention; FIG. 5 is a flow chart showing determination by the control unit during standby according to the present invention;

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

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a functional block diagram when an oscillator 101 is incorporated inside a mobile terminal 100 such as a smartphone that is commonly used. The battery 105 is a rechargeable high-capacity secondary battery called a lithium-ion battery, and is usually used for the portable terminal. Therefore, the oscillator 101 is not supplied with power and does not operate unless it is determined that there is a disaster. That is, when the disaster detection sensor unit 102 detects the occurrence of a disaster, the control unit 104 activates the driving unit 103, power is supplied from the battery 105 to the oscillator 101, and the oscillator 101 oscillates at a prescribed frequency. Start sending to the outside.

FIG. 2 is a functional block diagram of the oscillator 200 . When power is supplied to the oscillator 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 power supply are both the built-in battery 205 built in the oscillator 200 and the battery 210 for the portable terminal. becomes unusable, power is supplied from the built-in battery 205 to the oscillator circuit 203, and the oscillator 101 operates. The relay circuit 204 is preferably a mechanical relay that cannot be reopened once it is closed, but a semiconductor type relay is also possible due to space and cost considerations. The relay circuit 204 is operated by a transistor-controlled relay operating circuit 207, the transistor is turned on, current flows through the internal coil of the relay circuit 204, and the relay is closed. Power is supplied to the relay operating circuit 207 by the driving unit 211 of the portable terminal 100 by the control unit 212, the relay circuit 204 is closed, and the built-in battery 205 and the battery 210 are oscillated. Circuit 203 is powered. A diode 215 is for isolating the internal battery 205 and the battery 210 .

The oscillation circuit 203 preferably has a low-frequency long wave that can reach 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 pulse-like output to increase instantaneous transmission power. Since the wavelength of the antenna 202 becomes longer as the oscillation circuit 203 becomes longer, in order to reduce the size of the oscillator 200, a thin and compact spiral antenna such as a spiral antenna designed in a spiral pattern on a thin flexible substrate is used. antenna is desirable. Recently, a radio wave technology has been developed that enables radio waves to reach the ground even if it is buried in earth and sand, so such a technology may be introduced. The case 201 is made of a non-metallic material such as reinforced plastic that allows radio waves to pass through, and must be strong enough not to break even if a large amount of pressure is applied due to a debris flow or the like. If so, the applied pressure will be small, and the possibility of breaking is low. The terminals A 208 and B 209 are metal terminals embedded in the case 201, and usually have a structure in which they are brought into contact with the pressure of a spring pin or the like. Since the spring pin of the terminal is detached, dirt and snow do not enter the inside of the oscillator 200 . Furthermore, the oscillator 200 is a chip component that is solder-mounted on the printed circuit board inside the mobile terminal 100, and the case of the oscillator 200 is soldered to the printed circuit board. By soldering the terminals A 208, B 209, and C 213 attached to the circuit board to the printed circuit board, the possibility that the oscillator 200 will be destroyed is reduced even if a large external pressure is applied.

The sensor unit 102 includes a pressure sensor that detects pressure due to earth and sand or snow, a strain sensor that detects small strain, an AE sensor that detects cracks, peelings, and cracks in the cabinet of the mobile terminal 100, and a metal crack that detects breakage. A plurality of sensors, such as a magnetic sensor that detects a debris flow or an avalanche, are used to instantly detect a debris flow or an avalanche. By turning on power to 101, said oscillator 200 will start transmitting a distress signal.

When the portable terminal 100 is destroyed by a debris flow or an avalanche, and power is continuously supplied from the battery 210 of the portable terminal 100 to the oscillation circuit 203 via the terminal A208 of the oscillation section 200, the battery 210 has a 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 for the oscillator 200 is only the built-in battery 205, so there is little self-discharge, high voltage, high capacity button type small lithium ion A battery or the like is desirable.

Furthermore, 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 fully charged.

FIG. 3 is a flow chart showing the time course from when the portable terminal 100 is in a standby state until the control unit 212 determines that a disaster has occurred after a disaster has occurred. When the mobile terminal 100 is in a standby state, the normal intermittent reception interval is a very long interval of several seconds in order to suppress 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 very short intermittent reception intervals of, for example, 50 ms. This is based on the assumption that earth, sand, and snow are rushing at high speed like a debris flow or an avalanche. Even if an environment in good condition suddenly changes to an environment in which the radio wave condition is poor, such as being out of service area, the sensor unit 102 can detect the disaster if the sampling is as short as 50 ms, and the control unit 212 can detect the radio wave from the base station. A state can be established and the oscillator 200 can be activated. Needless to say, if the portable terminal 100 is being used by the user, the relay operation circuit 207 is turned on at any time because the reception is not intermittent.

The present invention will now be described with reference to examples. For the purpose of explanation, it is assumed that Mr. A is the user of the mobile terminal 100, and that Mr. A lives in a typical wooden detached house in a residential area. The radio wave condition from the base station is very good, and the electric field strength antenna bar displayed on the display unit of the mobile terminal 100 is assumed to be three or four. Like many users, Mr. A operates the mobile terminal 100 in his room in the detached house to make calls, make calls, shop online, or enjoy games, or use the mobile terminal 100 in his room There is also the possibility that it is charging, that is, it is in a standby state. Alternatively, the user may be preparing to go out with the mobile terminal 100 in a pocket or bag. That is, it is very likely that the mobile terminal 100 is located near Mr. A.

In this state, if the slope of the back mountain suddenly becomes a debris flow and hits Mr. A's house, there is a high possibility that Mr. A will be swept away along with his house. As a result, it is presumed that the portable terminal 100 in the vicinity of Mr. A will also be 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 is already pulsing at a prescribed frequency that serves as a distress signal. If the detailed information on the frequency is notified in advance to the police, fire departments, Ministry of Internal Affairs and Communications, local governments nationwide, the Self-Defense Forces, etc. from telecommunications carriers such as Docomo, AU, and Softbank, the frequency will be It is possible to bring a handy type receiver to the site and detect the fine frequency generated from inside the debris flow or avalanche, and find Mr. A, who is a buried subject.

Of course, the purpose is to rescue them as survivors, but in the current situation, there are many cases where people are buried in debris flows like those in Hiroshima and Atami for more than a month, and cannot respond to the wishes of their families to find them as soon as possible. Even if they are not alive, it is extremely important to find them as soon as possible, and the present invention can meet such expectations. Furthermore, when a debris flow occurs, the sediment is still in a fluid state, and the characteristics of long-wave diffraction and interference can be used. There is a possibility that it will disappear, and rescue as soon as possible is desired.

The above-mentioned invention is an oscillator that has spread to almost every person in the field where torrential rains have caused debris flows due to the effects of recent global warming, making it difficult to search for buried victims. to provide an inexpensive and efficient search tool. In the embodiment, long-wave radio waves are used as notification means, but minute vibrations or sounds such as bells and tuning forks may be used as notification means.

100 mobile terminal 101 oscillator 102 sensor unit 103 driving unit 104 control unit 105 battery
200 oscillator 201 case 202 antenna 203 oscillator circuit 204 relay circuit 205 built-in battery
207 Relay operating circuit 208 Terminal A 209 Terminal B 210 Battery 211 Actuator
212 Control part 213 Terminal C 214 Charging circuit 215 Diode

Claims (3)

A mobile terminal communicating with a base station, the mobile terminal comprising buried state detection means for detecting a buried state of the mobile terminal, and notification means activated when the buried state detection means is activated. A mobile terminal characterized by: 3. The burial detection means detects the burial state when the electric field strength of the radio wave received by the mobile terminal from the base station drops from a predetermined value or more to a predetermined value or less within a predetermined time. 1 mobile terminal described. 2. The mobile terminal according to claim 1, wherein the notification means identifies the location of the mobile terminal by transmitting specified frequency, vibration, or sound.

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