EP0484184A1 - Life-saving alarm for persons in a water medium - Google Patents

Life-saving alarm for persons in a water medium Download PDF

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Publication number
EP0484184A1
EP0484184A1 EP91310141A EP91310141A EP0484184A1 EP 0484184 A1 EP0484184 A1 EP 0484184A1 EP 91310141 A EP91310141 A EP 91310141A EP 91310141 A EP91310141 A EP 91310141A EP 0484184 A1 EP0484184 A1 EP 0484184A1
Authority
EP
European Patent Office
Prior art keywords
signal
alarm
transmitter
receiver
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP91310141A
Other languages
German (de)
English (en)
French (fr)
Inventor
Alfredo Tadeo Diaz Valdez
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0484184A1 publication Critical patent/EP0484184A1/en
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/02—Alarms for ensuring the safety of persons
    • G08B21/08—Alarms for ensuring the safety of persons responsive to the presence of persons in a body of water, e.g. a swimming pool; responsive to an abnormal condition of a body of water
    • G08B21/088—Alarms for ensuring the safety of persons responsive to the presence of persons in a body of water, e.g. a swimming pool; responsive to an abnormal condition of a body of water by monitoring a device worn by the person, e.g. a bracelet attached to the swimmer
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B23/00—Alarms responsive to unspecified undesired or abnormal conditions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C9/00—Life-saving in water
    • B63C9/21—Boats, rafts, buoys or the like, characterised by signalling means, e.g. lights, reflectors

Definitions

  • This invention relates to a safety system, and more particularly to a life-saving alarm for persons in a water medium.
  • an object of this invention to provide an immersion alarm (or an immersion sensor) intended to save the lives of persons, either children or invalids who accidentally fall into the water, and even persons practising water sports, or swimmers, in an emergency situation.
  • the invention relates to a protective element to be used mainly by those persons who are not able to swim, in case they fall into the water by accident or are totally or partially unable to make the minimum necessary movements to keep floating.
  • the protective element allows these persons to be in the water playing or amusing themselves without any risk to their lives.
  • the element can be used by persons who, even when they can swim, can find themselves in a dangerous situation (cramp, tiredness, watercurrent dragging, injury, etc.).
  • the present invention is characterized by the features set out in the characterizing portion of claim 1.
  • the alarm means to be attached to the body of the user may be in the form of a necklace, belt, wrist strap, etc.
  • Said alarm means may for example be activated when in contact with water to cause a signal to be emitted.
  • the invention also contemplates an apparatus receiving said signal, which should be located within a suitable sensing range, so that, when the receiver senses said signal this means that the immersion in water of the person equipped with the alarm means has been detected, and consequently an alert is given in this emergency situation.
  • the receiver may in turn activate an audible (or other) alarm device located at a place where help can be given to the person in danger.
  • the invention disclosed in this specification provides an ingenious and effective solution to the above-mentioned problems and allows the presence of children near seas, rivers, ponds, swimming-pools or any water medium, without any annoying discrimination but nevertheless noticeably decreasing the risks of any accidents caused by drowning (asphyxia by immersion).
  • the invention herein contained solves the above referred difficulties, on the basis of an alarm means which, once attached to the body of the user (e.g. a child), for example in the form of a necklace, belt, etc., allows parents to be on the alert as soon as the child enters the water; alternatively, if desired, the child may be allowed to remain safely in the water as long as the neck is not immersed. Furthermore, as above indicated, in the case of swimmers facing critical situations, they may be able to press a switch to activate the alarm.
  • an alarm means which, once attached to the body of the user (e.g. a child), for example in the form of a necklace, belt, etc., allows parents to be on the alert as soon as the child enters the water; alternatively, if desired, the child may be allowed to remain safely in the water as long as the neck is not immersed. Furthermore, as above indicated, in the case of swimmers facing critical situations, they may be able to press a switch to activate the alarm.
  • the alarm means may consist of an immersion sensor connected to a transmitter to send a remote signal through a short distance to a receiver which, when said sensor comes into contact with water, receives a signal activating the alarm.
  • the system is when necessary activated, not automatically, but by means of a release device such as a push button, etc.
  • the invention additionally comprises a perimetral antenna, one or more buoys, or an arrangement of posts, piles, rock fills, walls, etc., equipped with repeaters to receive the signals from any activated transmitters and to re-transmit the same with greater strength and at longer range.
  • the alarm device consists of a transmitter means 20, of a UHF or VHF modulated high frequency remote signal, which in turn comprises an activating means 23 for activating said transmitter means, which is carried by the user on a holder element 24.
  • the system is completed by a receiver means 21 for receiving the signal emitted by the remote transmitter means 20, when activated by the activating means 23.
  • the receiver means 21 is connected to an alarm device 25 which is operated when the receiver means 21 receives the signal from said transmitter means 20.
  • This receiver means 21 is arranged at a fixed place remote from said transmitter means 20.
  • the signal transmitter means 20 as shown in Figure 2 comprises a high frequency stage formed by a high frequency N-P-N transistor TRI connected to the tuned circuit formed by LI and CVI, CVI being variable in order to fix the frequency.
  • resistor RI In series with the collector-emitter path of transistor TRI is a resistor RI which limits the current and is connected to ground.
  • a bias resistor R2 Between the power supply and the base of transistor TRI, is a bias resistor R2, and between the transistor base and the tuned circuit is a feedback capacitor CI.
  • the choke ZI connected to the output of the tuned circuit attenuates the radio frequency flow to the power supply, and the capacitor C2 limits the radio-frequency existing in the emitter of TRI.
  • the modulation frequency is received at the base of transistor TRI through diode DI.
  • the low-frequency stage generating the information to be modulated comprises the integrated circuit ICI which connects the output of contact 17 to ground according to a predetermined code established by a combination of ground-connecting contacts 1 to 12 of ICI.
  • the integrated circuit ICI is MM53200N.
  • the oscillator is deblocked and emits a series of carrier waves.
  • Contact 13 of ICI constitutes the input of the local oscillator of the integrated circuit, which is connected to the RC network formed by R3 and C3 and which fixes the clock frequency of the low frequency stage.
  • the LED diode DLI further to operating as a resistance to adjust the supply voltage, is also useful for detecting the correct operation of the signal transmitter since, when activating means 30 is closed, the diode DLI sets the anode to the positive supply voltage, and flashes with the power supply voltage.
  • the coil LI also operates as transmitting antenna, whereby the signal transmitter has highly reduced dimensions.
  • the signal receiving means 21 is shown in more detail in the circuit diagram of Figure 3, the operation of which will be hereinafter described.
  • the signal coming from the antenna ANT is received at the base of the transistor TR10 after passing through the capacitor C12.
  • Both TR10 and C12 form, together with the tuned circuit L10-CV10 and network R10-D10 and R14 (the base biasing of transistor TR10), a superreaction type of receiver.
  • Capacitors C13 and C14 and choke ZI determine the reaction frequency for detecting the signal.
  • This detected PCM signal once filtered by the low-pass filter formed by R13, C15 and C16 to eliminate the high frequency component of the signal, is then amplified by TR12, which together with low resistance R16 and base polarization resistance R17 constitutes a high-gain amplifier.
  • the signal filtered by capacitor C17 is then amplified by transistor TR13 which is connected to the emitter resistor R21 to limit the capacity of the amplifier.
  • Pass-band clipping capacitor C19 is further connected to the collector and to the base of transistor TR13.
  • the output of this amplifying stage is coupled with the base of transistor TR14, by means of capacitor C20 and diode D15, once the signal has been rectified by means of diode D12 and filtered by capacitor C21.
  • the following stage comprises a Schmitt trigger, formed by transistors TR14 and TR15, and whose switching threshold is determined by the resistor R27.
  • This PCM signal is compared at IC2 with the shape of the signal which, once previously programmed, is memorised and, in the case of coincidence, is connected to ground contact 17 of IC2.
  • a PNP transistor TR16 connected to contact 17 of the IC2 by resistor R29, operates the transistor and biases the base of transistor TR17, which is connected to the divider formed by resistors R22 and R32 thus saturating the transistor and activating the coil of relay RL1, closing contacts C-B and connecting supply to the transducer Bo that omits the audible alarm signal.
  • the portion of the circuit appearing at the top is a conventional stabilized continuous current power supply circuit and is included only as reference for the case in which the circuit is connected to a 12V battery; it therefore does not need to be described in any detail herein.
  • the activating means 23 is formed by two electrodes, referenced 30 in Figure 2, which close the circuit when immersed in water.
  • an amplifying stage can be included between electrodes 30 and the supply circuit.
  • a circuit for controlling the activating means can be included, to allow detection of a temporary closure of the circuit activated by electrodes 30 without operating the alarm (e.g. as a result of a mere splash or by only a brief immersion).
  • Such control circuit is not herein illustrated as it is widely known in the art.
  • the audible alarm device 25 connected to receiver means 21 for receiving the remote signal, is formed by an acoustic transducer referenced as Bo in Figure 3.
  • the alarm device 25 can be of progressively increasing intensity.
  • the holder element 24 is attached to the user, either by the neck, wrist, waist or ankle, etc., depending on whether the transmitter is expected to operate when the user just enters the water (ankle), the water level exceeds a particular limit (waist) or when the water reaches a level of total prohibition or danger (neck).
  • Receiver means 21 for receiving the remote signal is arranged near the water medium, so that when a user carrying the remote signal transmitter means 20 enters the water and the activating means 23 becomes below the surface of the water medium, the transmitter means is activated and the respective signal is received by the antenna and then amplified, thus activating the alarm device 25 which indicates that the user is in the water with the activating means 23 below the water surface; the alarm device 25 consequently warns the persons in charge of the control and/or surveillance so that they can assist the person in an emergency situation.
  • the remote signal transmitter 20 may operate as a UHF or VHF high-frequency system; a modulation frequency indicative of a respective one of several users can be designed, and associated with different kinds of alarms so that it will be possible to determine which of the various users in the water medium is the one with the activating means 23 below the water surface. This is due to the fact that the integrated circuits applied to the signal transmitter means 20 and to the signal receiver means 21 can be programmed.
  • the embodiment illustrated in Figure 8 offers the possibility of having the antenna of the remote signal receiver means 21 formed by a frame antenna 31 perimetrally disposed with respect to the water medium or pool 32. Such a perimetral antenna allows the reception of the remote signal from a place very distant from the site where the emergency occurs. It is to be noted that the preferred embodiment of this invention is based on the emission of UHF or VHF frequency signals.
  • FIG. 6 Another embodiment of this alarm system is illustrated in Figures 6 and 7, and allows the detection and location of a user carrying the remote signal transmitter means 20 when said user is in the water medium, such as the sea, a river or a lake.
  • Figure 6 shows an arrangement by means of which the location of the user carrying the remote signal transmitter 20 can also be detected, especially when the water medium concerned is of a considerable size, such as the sea, a river, a lake, etc.
  • buoys 33, 34 and 35 arranged in the water medium 32 comprise repeater stations which emit signals which are received at the coast 36 by the receiver means 21 having a circuit which, in addition to emitting the alarm signal, also activates the monitor or computer interface 37 in which a respective alarm 33′, 34′ or 35′ is operated according to which of the buoys is emitting the signal.
  • the remote signal transmitter means 20 attached to the user's body effects a low-power transmission due to the reduced size thereof and its signal is transmitted at a higher intensity by the repeater station of the nearest buoy.
  • the nearer repeater station is one of the buoys 33, 34 and 35, it will re-transmit the signal noticeably increasing its power and range and also at a different frequency.
  • Figure 7 shows a remote signal transmitter means 20 with a manually operable activating means 23 which activates said means.
  • the antenna 42 By means of the antenna 42, it transmits the coded signal which is received by antenna 43 in the nearest buoy having a receiver means 22 similar to that shown in Figure 3.
  • This receiver means 22 is fed by a supply battery 45, which is in turn connected to a battery charger 46 for automatically recharging it.
  • the transmitter-repeater 47 When the receiver means 22 receives the coded signal, the transmitter-repeater 47 is activated and this, in turn, emits by means of antenna 48 a longer range signal which is received by antenna 49 of the receiver means 21 connected to the monitor device 37 of Figures 6 and 7. By means of the sound transducer and of the associated screen, the monitor device 37 indicates which one of the buoys is emitting the signal.
  • the holder element 24 for the transmitter means 20 may be formed by a band 50 of fixed or adjustable length, whose free end includes a closure device formed by a tapered tongue 52 which in its upper part carries a lug 53 projecting above the upper surface of said tongue 52, the lug 53 being arranged to be in a retracted position with respect to the tongue 52 and comprising a locking system using a key which can be inserted by opening 54.
  • the system is completed at the other end 55 of the band 50 by a staple 56, which allows the insertion of the tongue 52 by pressing the lug 53 inside the tongue 52 until it passes the staple 56, the lug 53 being locked when returning to its initial position outside the tongue 52.
  • a staple 56 which allows the insertion of the tongue 52 by pressing the lug 53 inside the tongue 52 until it passes the staple 56, the lug 53 being locked when returning to its initial position outside the tongue 52.
  • the band 50 can be fixed at any part of the user's body, such as by the ankle, waist, arm or neck, and has the transmitter means 20 attached thereto with electrodes 30 of activating means 23 exposed so that, when in contact with water, the circuit is closed and the remote signal transmitter means 20 is activated.
  • Activating means 23 of the remote signal transmitter means 20 can have variations from the above described pattern; for example electrodes 30 can be covered by a water-proofing adhesive tape, so that the activating means 23 can be immersed in water and only activated when the user removes said adhesive tape and closes the circuit by thus bringing the electrodes 30 into contact with water.
  • Another alternative use of this invention intended for swimmers, consists in placing the activating means 23 in a watertight case, with a switch operated by pressure through a flexible wall of said watertight case.
  • the remote transmitter 20 and receiver 21 may operate on audio frequency sound signals or ultrasonic signals.

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  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Alarm Systems (AREA)
  • Emergency Alarm Devices (AREA)
  • Selective Calling Equipment (AREA)
EP91310141A 1990-11-01 1991-11-01 Life-saving alarm for persons in a water medium Withdrawn EP0484184A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AR31826990 1990-11-01
AR90318269 1990-11-01

Publications (1)

Publication Number Publication Date
EP0484184A1 true EP0484184A1 (en) 1992-05-06

Family

ID=3478795

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91310141A Withdrawn EP0484184A1 (en) 1990-11-01 1991-11-01 Life-saving alarm for persons in a water medium

Country Status (7)

Country Link
EP (1) EP0484184A1 (es)
JP (1) JPH04274598A (es)
KR (1) KR920010521A (es)
BR (1) BR9104729A (es)
CA (1) CA2054532A1 (es)
MX (1) MX9101863A (es)
ZA (1) ZA918658B (es)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0653737A2 (en) * 1993-11-15 1995-05-17 Brian William Casey A detection device
GB2287564A (en) * 1994-03-09 1995-09-20 John Adam French Overboard alarm and detector
FR2725819A1 (fr) * 1994-07-19 1996-04-19 Patrick Andre Henri Chevalier Installation pour la protection de personnes exposees aux risques de chute dans de l'eau ou d'eloignement
ES2110900A1 (es) * 1995-04-26 1998-02-16 Vera Valentin Miota Instalacion para la inmovilizacion de cualquier embarcacion a motor, por caida al agua.
WO1998039752A1 (en) * 1997-03-05 1998-09-11 Justin James Phillbrook Mayday communication apparatus
WO2000021050A1 (en) * 1998-10-07 2000-04-13 Diel Marketing Proprietary Limited Alarm arrangement
ES2192147A1 (es) * 2002-03-14 2003-09-16 Carlos Horacio Placenti Dispositivo avisador para salvamento de personas en medios acuaticos y procedimiento correspondiente.
WO2003076265A1 (es) * 2002-03-14 2003-09-18 Carlos Horacio Placenti Dispositivo avisador para salvamento de personas en medios acuaticos y procedimiento correspondiente
ES2293760A1 (es) * 2004-12-21 2008-03-16 Exex Pool, S.L. Dispositivo de seguridad personal en piscinas.
CN104994302A (zh) * 2015-07-21 2015-10-21 马科峰 一种基于rfid技术的游泳池定向无线信号触发器

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2878179B2 (ja) * 1996-04-12 1999-04-05 日本電気移動通信株式会社 水難通報装置
KR20030094793A (ko) * 2002-06-07 2003-12-18 기한전자주식회사 무선 센서를 이용한 방범장치
FR2881837B1 (fr) * 2005-02-10 2007-04-06 Stephane Leal Dispositif de signalisation et de localisation d'un individu a la mer et procede pour sa mise en oeuvre
JP2007026331A (ja) * 2005-07-20 2007-02-01 Marine Giken:Kk 溺れ監視システム
KR100972024B1 (ko) * 2008-03-18 2010-08-19 대우조선해양이엔알 주식회사 초음파발신기가 부착된 수중 이동체의 위치파악 장치
EP2803125B1 (en) 2012-01-10 2016-09-14 Hzo Inc. Methods, apparatuses and systems for monitoring for exposure of electronic devices to moisture and reacting to exposure of electronic devices to moisture
US9146207B2 (en) 2012-01-10 2015-09-29 Hzo, Inc. Methods, apparatuses and systems for sensing exposure of electronic devices to moisture
KR101560114B1 (ko) 2013-01-08 2015-10-13 에이치제트오 인코포레이티드 전자 장치의 수분에의 노출을 검출하고 그에 반응하는 장치, 시스템, 및 방법
CN111540173B (zh) * 2020-04-22 2021-07-27 上海振华重工电气有限公司 一种基于智能画面识别的落水报警系统及方法
WO2022044996A1 (ja) * 2020-08-23 2022-03-03 義基 片上 警報吹鳴器
JP6962651B1 (ja) * 2020-08-23 2021-11-05 義基 片上 警報吹鳴器

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3810146A (en) * 1972-03-22 1974-05-07 Dworcan M Alarm system for the safety of non-swimmers
US3953843A (en) * 1974-05-09 1976-04-27 General Scanning Devices, Inc. Swimming pool alarm
US4714914A (en) * 1983-12-05 1987-12-22 Automatic Safety Products Liquid immersion alarm
FR2609961A1 (fr) * 1987-01-22 1988-07-29 Poirier Alain Dispositif d'alerte de la chute d'un homme a la mer
US4777477A (en) * 1987-04-27 1988-10-11 Watson Ronald R Surveillance alarm-security system
GB2212642A (en) * 1987-11-17 1989-07-26 John Martin Monitoring system
DE3815611A1 (de) * 1988-05-05 1989-11-16 Kolbatz Klaus Peter Notrufmeldeeinrichtung
US4918433A (en) * 1989-09-21 1990-04-17 Moore Robert L Water immersion alarm belt

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3810146A (en) * 1972-03-22 1974-05-07 Dworcan M Alarm system for the safety of non-swimmers
US3953843A (en) * 1974-05-09 1976-04-27 General Scanning Devices, Inc. Swimming pool alarm
US4714914A (en) * 1983-12-05 1987-12-22 Automatic Safety Products Liquid immersion alarm
FR2609961A1 (fr) * 1987-01-22 1988-07-29 Poirier Alain Dispositif d'alerte de la chute d'un homme a la mer
US4777477A (en) * 1987-04-27 1988-10-11 Watson Ronald R Surveillance alarm-security system
GB2212642A (en) * 1987-11-17 1989-07-26 John Martin Monitoring system
DE3815611A1 (de) * 1988-05-05 1989-11-16 Kolbatz Klaus Peter Notrufmeldeeinrichtung
US4918433A (en) * 1989-09-21 1990-04-17 Moore Robert L Water immersion alarm belt

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0653737A2 (en) * 1993-11-15 1995-05-17 Brian William Casey A detection device
EP0653737A3 (en) * 1993-11-15 1996-01-31 Brian William Casey Detection device.
GB2287564A (en) * 1994-03-09 1995-09-20 John Adam French Overboard alarm and detector
FR2725819A1 (fr) * 1994-07-19 1996-04-19 Patrick Andre Henri Chevalier Installation pour la protection de personnes exposees aux risques de chute dans de l'eau ou d'eloignement
ES2110900A1 (es) * 1995-04-26 1998-02-16 Vera Valentin Miota Instalacion para la inmovilizacion de cualquier embarcacion a motor, por caida al agua.
WO1998039752A1 (en) * 1997-03-05 1998-09-11 Justin James Phillbrook Mayday communication apparatus
WO2000021050A1 (en) * 1998-10-07 2000-04-13 Diel Marketing Proprietary Limited Alarm arrangement
ES2192147A1 (es) * 2002-03-14 2003-09-16 Carlos Horacio Placenti Dispositivo avisador para salvamento de personas en medios acuaticos y procedimiento correspondiente.
WO2003076265A1 (es) * 2002-03-14 2003-09-18 Carlos Horacio Placenti Dispositivo avisador para salvamento de personas en medios acuaticos y procedimiento correspondiente
ES2213478A1 (es) * 2002-03-14 2004-08-16 Carlos Horacio Placenti Mejoras en el objeto de la patente principal n.200200604 por: "dispositivo avisador para salvamento de personas en medios acuaticos y procedimiento correspondiente.
ES2293760A1 (es) * 2004-12-21 2008-03-16 Exex Pool, S.L. Dispositivo de seguridad personal en piscinas.
CN104994302A (zh) * 2015-07-21 2015-10-21 马科峰 一种基于rfid技术的游泳池定向无线信号触发器
CN104994302B (zh) * 2015-07-21 2018-09-21 马科峰 一种基于rfid技术的游泳池安全保障系统

Also Published As

Publication number Publication date
KR920010521A (ko) 1992-06-26
MX9101863A (es) 1992-07-08
BR9104729A (pt) 1992-06-23
CA2054532A1 (en) 1992-05-02
JPH04274598A (ja) 1992-09-30
ZA918658B (en) 1993-04-30

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