WO2021094882A1 - Dispositif de sécurité de trappe - Google Patents

Dispositif de sécurité de trappe Download PDF

Info

Publication number
WO2021094882A1
WO2021094882A1 PCT/IB2020/060447 IB2020060447W WO2021094882A1 WO 2021094882 A1 WO2021094882 A1 WO 2021094882A1 IB 2020060447 W IB2020060447 W IB 2020060447W WO 2021094882 A1 WO2021094882 A1 WO 2021094882A1
Authority
WO
WIPO (PCT)
Prior art keywords
trapdoor
safety device
sensor
tilt sensor
light source
Prior art date
Application number
PCT/IB2020/060447
Other languages
English (en)
Inventor
Jasper THWAITE
Original Assignee
Thwaite Jasper
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 Thwaite Jasper filed Critical Thwaite Jasper
Publication of WO2021094882A1 publication Critical patent/WO2021094882A1/fr

Links

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
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
    • E02D29/127—Manhole shafts; Other inspection or access chambers; Accessories therefor with devices for impeding fall or injuries of persons
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
    • E02D29/14—Covers for manholes or the like; Frames for covers
    • E02D29/1481—Security devices, e.g. indicating unauthorised opening
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B5/00—Doors, windows, or like closures for special purposes; Border constructions therefor
    • E06B5/01—Trap-doors
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/02—Mechanical actuation
    • G08B13/08—Mechanical actuation by opening, e.g. of door, of window, of drawer, of shutter, of curtain, of blind
    • 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
    • G08B21/18—Status alarms
    • G08B21/22—Status alarms responsive to presence or absence of persons
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B23/00—Alarms responsive to unspecified undesired or abnormal conditions
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
    • G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources

Definitions

  • the present invention relates to a trapdoor safety device, in particular a safety device for warning passers-by of the presence of an open trapdoor.
  • Trapdoors are used in many premises, between floors and/or in flooring.
  • a light is provided to illuminate the area around the trapdoor. Rather than have the light permanently switched on, the light may require manual activation and manual deactivation to avoid energy wastage.
  • automatic light switches may be provided which are rigged to trapdoors and switch on when the trapdoor is open. However, this does prevent the risk presented to anyone in the trapdoor vicinity and in particular those who are not familiar with the area or even aware of the existence of the trapdoor. In such cases, the activation of a light may not provide sufficient or suitable warning of the presence of a trapdoor.
  • Cikon Chinese patent application CN-A-205 692 305 (XUE) discloses a safety warning device based on an electro-optical distance measurement (EDM).
  • EDM electro-optical distance measurement
  • Korean patent application KR 2014 0 002 669 discloses a fall protection device designed for a manhole.
  • US patent US 5 554 972 discloses apparatus and a method to provide an electronic perimeter warning system to prevent the ingress or egress of persons or machines from a selected area.
  • Korean patent application KR-A-20100022651 discloses a manhole cover device with a lamp is provided to prevent accidents.
  • the lamp illuminates an area around a manhole.
  • a controller is connected to a battery, and controls power supplied to the lamp.
  • a solar battery charges the battery.
  • Chinese patent application CN-A-105139561 discloses a manhole cover inclination alarm device which comprises an angle sensor which is used for detecting an inclination angle of the manhole cover.
  • a microprocessor is connected to the sensor. When the angle sensor detects that the manhole cover is inclined to a pre set angle, the inclination sensor causes an alarm to be generated.
  • Cida utility model CN-U-205 247 560 discloses a motor-driven lid for a manhole cover for use on highways.
  • An LED lamp has a control means which switches on a warning light in poor weather or low visibility.
  • Ciddle Chinese utility model CN-U-20896559
  • CHEN Chinese utility model CN-U-20896559
  • IOT internet of things
  • the alarm system comprises a well lid seat ring, an outer cover for sealing the well lid seat ring that is arranged on the upper portion of the well lid seat ring, and an inner cover which is arranged in the well lid seat ring.
  • the inner cover is provided with a groove for containing a sealed waterproof box. At least two symmetric glass containers are obliquely arranged in the sealed waterproof box and a mercury tilt switch detects inclination of the inner cover. When the lid is an alarm is triggered.
  • Chinese utility model CN-U-203588401 discloses a manhole cover monitoring and alarm system which includes a manhole cover body.
  • the lower surface of the manhole cover body is provided with a drive plate and a control box.
  • a mercury switch is arranged on the drive plate quite conveniently and triggers when the manhole cover is stolen or moved.
  • the control box transmits an alarm to a remote monitoring centre.
  • the present invention arose in order to overcome problems suffered by existing devices.
  • a trapdoor safety device comprising: a tilt sensor which in use is attached to an underside of a trapdoor; the tilt sensor is connected to a controller which receives a signal from a proximity sensor; also connected to the controller are a light source and an alert mechanism; the tilt sensor is operative, when the trapdoor is opened, to switch the proximity sensor from a quiescent state to an active state, so that the proximity sensor is operative to detect a proximity event, upon detection of a proximity event the controller receives the signal and causes the light source to illuminate the trapdoor and/or a trapdoor opening and activate the alert mechanism.
  • the trapdoor safety device becomes automatically active; that is switched from a quiescent to a non-quiescent or an active state. Therefore when the trapdoor is opened, even by a very small amount, the tilt sensor detects that the trapdoor has been displaced from its closed state or orientation and alerts the proximity sensor by causing it to be switched to a non-quiescent state. In this the alert mechanism is activated when a trapdoor securement means is damaged or partially opened. Only when the trapdoor is properly closed and secured, may the trapdoor safety device be switched to a dormant or quiescent state.
  • trapdoor may refer to any opening in a floor or ground that has a cover or a hatch or manhole cover.
  • the device may be housed within a single unit.
  • the single unit may be arranged on or near to the trapdoor and include wireless means which communicates with a proximity sensor which in some embodiments may be located outside the housing.
  • the device may comprise a plurality of components or units in communication one with another wirelessly or connected by hard-wiring, or a combination of wireless and hard wired connections.
  • the single unit may be adapted to be hung, stuck to or fixed to an underside of a trapdoor.
  • the safety device may be integrated with the trapdoor or frame in which the trapdoor is located.
  • the trapdoor comprises a securement means that securely closes the trapdoor and prevents opening until the securement means is unlocked or displaced which is authorised upon receipt of an authorisation command which may be transmitted from a wireless transmitter in the device.
  • the securement means may comprise a holster.
  • the alert mechanism may be activated when the trapdoor securement means is authorised so that it can be unlocked or displaced. This may be performed manually or by way of an automatic actuator when commanded. Alternatively, should the securement means become compromised, for example become damaged, the alert mechanism may issue a warning signal or alarm indicating that the safety device is damaged and may not be functioning.
  • the holster may receive at least one bolt in order to secure the trapdoor, and the bolt may include a bayonet which is adapted to turn within the holster and engage therein in order to secure the trapdoor.
  • An actuator which operates the bolt, in the holster, may be connected wirelessly or by a hardwire connection to the alert mechanism. Movement of the bolt within the holster, or out of the holster, thereby the causes the alert mechanism to be activated. In this way users and anyone in the surrounding area of the trapdoor is alerted to the danger of a trapdoor being open or a faulty trapdoor securement means.
  • the single unit which encloses the device, may be envisaged to be adapted to be displaceable from the underside of the trapdoor, for example for maintenance, upgrade or battery replacement.
  • the unit is adapted to be secured in a correct orientation on the trapdoor, such that the light source, for example, is correctly directed in use.
  • the unit may be connected to the trapdoor by a twist lock or a bayonet securement means, for example wherein the unit is placed and turned to secure the unit on the trapdoor. In this way the unit can only be fitted in a selected orientation which may be important when opening so as not to damage it against adjacent furniture or fittings.
  • the proximity event may be envisaged to relate to a person being detected when passing or being in the vicinity of the trapdoor.
  • the safety device When the trapdoor is open and the safety device is switched to an activate state, any time that a proximity event is detected the safety device is operative to generate an alert and/or activate a light.
  • the safety device may be programable to select the type of alerts, for example audible and/or visible, and the option to switch on a light to illuminate the area and/or a space below the trapdoor.
  • the light may include a sensor that detects level of light so that the light is only activated in low light levels or darkness.
  • the tilt sensor is operative to switch the proximity sensor to a quiescent state when the trapdoor is closed so as to avoid false indications of a proximity event. This prevents activation of the alerts and/or light when the trapdoor is closed.
  • the alert mechanism comprises an audible alert.
  • the device may comprise a loudspeaker, such that the alert is broadcast to the surrounding area thereby alerting passers-by audibly and upon detection of their presence.
  • the alert mechanism comprises a visual alert.
  • the device may comprise a flashing light or series of lights that are lit in sequence or that strobe. It is appreciated that the light used may be a dedicated and independent light from the light source which illuminate the area.
  • the proximity sensor emits an electromagnetic field or a beam of electromagnetic radiation and detects changes in the field or in a reflected signal.
  • the proximity sensor may comprise an optical sensor.
  • the proximity sensor comprises an infrared (IR) sensor or passive infrared (PIR) sensor.
  • IR infrared
  • PIR passive infrared
  • the proximity sensor comprises a radio frequency (RF) sensor.
  • RF radio frequency
  • the tilt sensor is operative to activate other electronic elements.
  • the energy source comprises a battery supplying electric current to at least one of and preferably all of: the proximity sensor, the light source, the alert mechanism and the tilt sensor. In other embodiments the energy source may comprise a mains electricity supply.
  • the device may comprise a timer, clock or timing means.
  • the device comprises a sleep mode, or low-power mode, which may be entered after no activity has been detected by the proximity sensor for a set or predefined period of time or at user specified times.
  • the proximity sensor may be enabled to switch the device to an operative mode, so as to enable the light source and/or the alert mechanism to operate.
  • the light source comprises a lens, which may be arranged to direct the light source and/or to enhance the light source.
  • the lens may diffuse or spread light from the light source at a low level around the trapdoor, so as to avoid dazzling passers-by. This controlled level of lighting also ensures that lighting of the area around the trapdoor is adequate to indicate clearly the trapdoor opening.
  • the lens may be combined with, or have associated therewith, one or more reflectors.
  • The, or each, reflector is ideally arranged to reflect and/or direct light in use, so as to alert anyone in the vicinity of the trapdoor or people who are passing- by.
  • several light sources may be disposed around the trapdoor.
  • the light source may comprise a plurality of lights or light emitting diodes (LEDs), arranged around the trapdoor entrance, for example around its perimeter.
  • LEDs light emitting diodes
  • the light source(s) may be operated in response to a signal from the proximity sensor. For example, they may be switched to change colour and/or flash on and off in sequence and/or switched to become brighter, upon receipt of a signal indicating proximity of a passer-by.
  • the tilt sensor is operative to activate and deactivate the proximity sensor. In this way the tilt sensor controls when the proximity sensor is active or dormant (quiescent) so that when the trapdoor is closed, and the tilt sensor detects and indicates that the trapdoor is closed, the device is not operative to detect proximity of passers-by as the safety device is in a quiescent state or hibernation mode.
  • the light source may not automatically switch off upon closure of the trapdoor but is arranged to remain illuminated for a pre-selected time after closing of the trapdoor as a courtesy light. This allows time for a user to lock and check the trapdoor and to vacate the area whilst it is remains lit.
  • the safety device may include a timer means that overrides the switching off the light source in order to achieve this.
  • the tilt sensor communicates with the proximity sensor by way of a wireless communication device, such as Bluetooth (RTM) transmitter.
  • a wireless communication device such as Bluetooth (RTM) transmitter.
  • the tilt sensor communicates with the alert mechanism by way of a wireless communication device, such as Bluetooth (RTM) transmitter.
  • the tilt sensor communicates with the light source by way of a wireless communication device, such as wireless transmitter which operates in accordance with Bluetooth (RTM) protocol.
  • a wireless communication device such as wireless transmitter which operates in accordance with Bluetooth (RTM) protocol.
  • the safety device has a transmitter that is operative to transmit a signal to a remote electronic device, such as a smartphone or tablet, or to a monitoring network, in order to indicate status of the trapdoor. For example, when the trapdoor is opened, and during the period it remains open, a status signal may be repeatedly transmitted until the trapdoor is closed. If suspected damage is detected, for example if the securement means is compromised, a warning signal is transmitted.
  • a user is able to monitor the status of the trapdoor remotely, for example on a personal computer, smartphone, tablet or on a portable wireless electronic device.
  • Figure 1 shows an isometric view of an embodiment of the device according to the present invention
  • Figure 2 shows a reverse isometric view of the embodiment of the device shown in Figure 1 ;
  • Figure 3 shows an exploded isometric view of the embodiment of the device shown in Figure 1 ;
  • Figure 4 shows a reverse isometric view of the embodiment of the device shown in Figure 1 ;
  • Figure 5 shows a view of a second embodiment of the device according to the present invention.
  • Figures 6A and 6B show an alternative embodiment of the invention with a light fitted above a trapdoor.
  • the device 99 comprises a trapdoor securement means which includes a holster 299, an electrical energy source (not shown), a proximity sensor 2, a light source 64, 66, a two part alert mechanism 17, 64 and a tilt sensor 7, wherein the proximity sensor 2 is arranged to detect proximity of a passer-by to the trapdoor and activate the alert mechanism to provide an alert of this proximity, the light source 66 is arranged to illuminate the trapdoor; and the tilt sensor 2 is arranged to deactivate the proximity sensor.
  • a trapdoor securement means which includes a holster 299, an electrical energy source (not shown), a proximity sensor 2, a light source 64, 66, a two part alert mechanism 17, 64 and a tilt sensor 7, wherein the proximity sensor 2 is arranged to detect proximity of a passer-by to the trapdoor and activate the alert mechanism to provide an alert of this proximity, the light source 66 is arranged to illuminate the trapdoor; and the tilt sensor 2 is arranged to deactivate the proximity sensor.
  • the embodiment comprises an octagonal device 99, comprised of a device unit 199 and a holster 299 adapted to secure to the underside of the trapdoor.
  • the unit 199 comprises an octagonal unit arranged to be located onto and secured on the underside of the trapdoor through a plurality of screw holes.
  • a bayonet mechanism comprising bayonet slots 29 in a wall 9 and bayonet studs 30 projecting from the unit sides.
  • the wall 9 fits inside the sides of the unit hidden by the outer sidewalls 8 of the unit.
  • a translucent or transparent lens 1 is arranged above the sidewalls 8 of the unit, having a flat top and eight substantially orthogonal panels between the top and unit sidewalls 8.
  • the octagonal panels of the lens extend substantially parallel the outer sidewalls of the unit, and cover over eight reflectors 6, which comprise frustoconical reflective portions with a light source 64, 66 at the base of each cone.
  • These light sources are light emitting diodes (LEDs).
  • One of the reflectors comprises a white LED 66 at the base of the cone.
  • the other reflectors comprise orange LEDs 64 at the base of the cones.
  • the lens 1 is made from polycarbonate and is tough in order to protect internal components of the device. Ribs or lenticules on the lens 1 help disperse light from the white and orange LEDs. In particular upright ribs 38 disperse or spread white light source 66 to either side of the trapdoor and device.
  • a PIR (passive infra-red) sensor 2 is located centrally on the device below the lens 1 in the first embodiment and near the top end of the device in use extending from the lens in the second embodiment.
  • the sensor 2 detects infra-red radiation from objects in its field of view and detects when a passer-by is walking too close to the device and/or trapdoor, even when the surrounding environment is dark.
  • the light sources 64, 66 such as flashing light and audible alert is switched on to warn passers-by of a potential hazard.
  • a PIR sensor PCB 4 (printed circuit board) holds the sensor in position and connects to a main PCB 7 below
  • the orange LED light sources 64 flash in 7 directions when the PIR sensor is triggered, visually alerting people of the trapdoor.
  • the white LED 66 turns on when the device is detected by the tilt sensor to be vertical, illuminating the trapdoor opening below, so the danger is visible in low light. The light is directed to a region surrounding the trapdoor opening.
  • the reflectors 6 direct the light from LEDs outwards, away from the device and are made from vacuum metallised polycarbonate.
  • a reflector bracket 5 and cover 3 hold the reflectors and LEDs securely in place and is made from sheet metal.
  • the audible alert 17 comprises a loudspeaker which activates when the PIR sensor is triggered and sounds an alarm and will also beep when the batteries are running low on power.
  • the main PCB and control means control all of the electronic components and the tilt sensor which turns off electronic components of the device when in a quiescent state or sleep mode when in a horizontal position i.e. when the trapdoor is closed. In this way a user may be enabled to allow the tilt sensor to activate and deactivate the proximity sensor and/or energise the light sources.
  • the tilt sensor when the tilt sensor is vertical (i.e. trapdoor open) the tilt sensor activates the white downward facing LED and puts the alarm into standby mode or non-quiescent state.
  • the unit sidewalls are made from injection moulded polycarbonate for impact resistance and UV stability.
  • the unit sidewalls 8 and the holster 299 comprise vents 22 for release of sound from the alert loudspeaker 17.
  • the unit holds three AA batteries under a battery cover 18 with a rubber seal to protect from water and dirt ingress into the base 31 of the unit.
  • the lens 1 is screwed onto the sidewall at plural screw clips 23.
  • the unit is adapted to be mounted to the underneath of a trapdoor using multiple screw fixings 33 and bayonet so the unit so the unit can easily be removed to replace the batteries.
  • a light 150 is fitted above a trapdoor 100.
  • the trapdoor 100 is connected to the floor 120 by way of a hinge 190.
  • Unit 110 is attached to an underside of the trapdoor 100.
  • the trapdoor 100 is opened, by throwing bolt 160 and releasing it from catch 170, the trapdoor is able to open on hinge 190 in the direction of arrow A.
  • the unit 110 switches from a quiescent mode to an active mode and a signal is transmitted from Bluetooth transmitter 120 to a Bluetooth receiver 140 which communicates with light 150. This results in the light 150 illuminating the area around the trapdoor 100 so as to show the opening and so indicates the risk of falling into the opening to passers by.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Structural Engineering (AREA)
  • Emergency Management (AREA)
  • Civil Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Emergency Alarm Devices (AREA)
  • Alarm Systems (AREA)

Abstract

La présente invention concerne un dispositif de sécurité de trappe agencé pour être fixé à une face inférieure d'une trappe et comprenant un moyen de fixation de trappe, une source d'énergie électrique, un capteur de proximité, une source de lumière, un mécanisme d'alerte et un capteur d'inclinaison. Le capteur de proximité est agencé pour détecter la proximité d'un passage par rapport à la trappe et activer le mécanisme d'alerte pour fournir une alerte de cet événement de proximité. La source de lumière est agencée pour éclairer la trappe ; et le capteur d'inclinaison est agencé pour activer et désactiver au moins l'un du capteur de proximité ou de la source de lumière.
PCT/IB2020/060447 2019-11-11 2020-11-06 Dispositif de sécurité de trappe WO2021094882A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1916340.1 2019-11-11
GB1916340.1A GB2588821B (en) 2019-11-11 2019-11-11 A trapdoor safety device

Publications (1)

Publication Number Publication Date
WO2021094882A1 true WO2021094882A1 (fr) 2021-05-20

Family

ID=69062233

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2020/060447 WO2021094882A1 (fr) 2019-11-11 2020-11-06 Dispositif de sécurité de trappe

Country Status (2)

Country Link
GB (1) GB2588821B (fr)
WO (1) WO2021094882A1 (fr)

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2089659U (zh) 1991-01-14 1991-11-27 中国科学技术大学 微波及毫米波半导体器件通用波导腔体
US5554972A (en) 1994-10-21 1996-09-10 Garlock Equipment Company Electronic perimeter warning system
US20060261941A1 (en) * 2005-05-20 2006-11-23 Drake David A Remote sensing and communication system
US20100019912A1 (en) * 2008-07-22 2010-01-28 Ussi, Llc Manhole security system
KR20100022651A (ko) 2008-08-20 2010-03-03 유진곤 램프가 구비된 맨홀덮개장치
US20110148631A1 (en) * 2009-12-21 2011-06-23 Mcgard Llc Manhole Security Cover
KR20140002669A (ko) 2010-11-12 2014-01-08 지멘스 피티이 엘티디 모듈러 전기화학 시스템들과 방법들
CN203588401U (zh) 2013-11-27 2014-05-07 成都扬帆电力制造有限公司 井盖监控报警系统
CN104464134A (zh) 2014-12-01 2015-03-25 福建三鑫隆新材料技术开发股份有限公司 倾斜式井盖报警系统及报警方法
CN105139561A (zh) 2015-08-07 2015-12-09 高坤 井盖倾斜报警装置、方法、系统及井盖
CN205247560U (zh) 2015-12-19 2016-05-18 长安大学 非机动道无井盖路段警示器
CN205692305U (zh) 2016-06-20 2016-11-16 苏州华徕光电仪器有限公司 一种基于光电测距的安全警示装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN208965591U (zh) * 2018-08-30 2019-06-11 福建泉欣电力有限公司 一种基于NB-IoT物联网的智能井盖

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2089659U (zh) 1991-01-14 1991-11-27 中国科学技术大学 微波及毫米波半导体器件通用波导腔体
US5554972A (en) 1994-10-21 1996-09-10 Garlock Equipment Company Electronic perimeter warning system
US20060261941A1 (en) * 2005-05-20 2006-11-23 Drake David A Remote sensing and communication system
US20100019912A1 (en) * 2008-07-22 2010-01-28 Ussi, Llc Manhole security system
KR20100022651A (ko) 2008-08-20 2010-03-03 유진곤 램프가 구비된 맨홀덮개장치
US20110148631A1 (en) * 2009-12-21 2011-06-23 Mcgard Llc Manhole Security Cover
KR20140002669A (ko) 2010-11-12 2014-01-08 지멘스 피티이 엘티디 모듈러 전기화학 시스템들과 방법들
CN203588401U (zh) 2013-11-27 2014-05-07 成都扬帆电力制造有限公司 井盖监控报警系统
CN104464134A (zh) 2014-12-01 2015-03-25 福建三鑫隆新材料技术开发股份有限公司 倾斜式井盖报警系统及报警方法
CN105139561A (zh) 2015-08-07 2015-12-09 高坤 井盖倾斜报警装置、方法、系统及井盖
CN205247560U (zh) 2015-12-19 2016-05-18 长安大学 非机动道无井盖路段警示器
CN205692305U (zh) 2016-06-20 2016-11-16 苏州华徕光电仪器有限公司 一种基于光电测距的安全警示装置

Also Published As

Publication number Publication date
GB2588821A (en) 2021-05-12
GB2588821B (en) 2021-11-10
GB201916340D0 (en) 2019-12-25

Similar Documents

Publication Publication Date Title
US5763872A (en) Motion actuated night light
US9445699B2 (en) Low power toilet light illuminator and night light with photosensor activation
US7321301B2 (en) Wireless children's safety light in a security system
US20100148989A1 (en) Safety or Alert Device
US6691467B2 (en) Illuminated security gate with optional audible alarm
AU2013101353A4 (en) Improvements to Pedestrian Crossings
EP3466760B1 (fr) Dispositif d'éclairage pouvant être utilisé pour le camping et les loisirs et assurant des fonctions de feu de détresse de sécurité de véhicule et de détection d'incendie
US6079157A (en) Illuminated security barrier for passageways
CA3069508A1 (fr) Detecteur de danger avec indicateur d'etat optique
NL2002293C2 (en) Emergency illumination device and method of operating an emergency illumination device.
WO2021094882A1 (fr) Dispositif de sécurité de trappe
KR102360604B1 (ko) 보안등
JP3139482U (ja) エスカレータ用警報装置
KR102477381B1 (ko) 쉼터의자를 가진 태양광 보안 폴 시스템
JP4941774B2 (ja) 不審者威嚇装置
ES2761819T3 (es) Conjunto de panel
CN218645508U (zh) 一种柱帽灯
AU2009101269A4 (en) Safety or alert device
CN208703783U (zh) 一种多功能安防照明装置
CN215133884U (zh) 一种防误伤紫外线灯
AU747406B2 (en) Motion actuated night light
AU2008101198A4 (en) Safety or alert device
CN200990514Y (zh) 具有防盗求救功能的停电照明设备
JP3130218U (ja) 防犯機能を持つ独立電源の照明灯
AU2008255236A1 (en) Safety or alert device

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20808192

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20808192

Country of ref document: EP

Kind code of ref document: A1