EP0901113A2 - Répulsion d'insectes - Google Patents
Répulsion d'insectes Download PDFInfo
- Publication number
- EP0901113A2 EP0901113A2 EP98306527A EP98306527A EP0901113A2 EP 0901113 A2 EP0901113 A2 EP 0901113A2 EP 98306527 A EP98306527 A EP 98306527A EP 98306527 A EP98306527 A EP 98306527A EP 0901113 A2 EP0901113 A2 EP 0901113A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- transducer
- alarm
- transducers
- smoke
- emit
- 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- Withdrawn
Links
Images
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
- G08B29/18—Prevention or correction of operating errors
- G08B29/185—Signal analysis techniques for reducing or preventing false alarms or for enhancing the reliability of the system
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
Definitions
- This invention relates to a insect repulsion.
- Alarm transducers generally comprise a sensor and/or a warning decvice mounted inside a housing.
- One such alarm transducer comprises a smoke detector having a housing, a sensing chamber mounted inside the housing and provided with an opening through which smoke can enter.
- a sensor inside the chamber senses the smoke either by optical or by ionisation methods.
- a disadvantage of known transducers, such as the above-mentioned smoke detector, is that insects can enter the sensing chamber through the an opening in the housing and cause a fault or a false alarm.
- Electronic insect repellant apparatus are known. However, such apparatus are relatively expensive, and thus it is extremey costly to provide one such apparatus in each room of a hotel or office etc.. Another disadvantage of such apparatus is that they are generally regarded as a luxury item and accordingly they are rarely purchased.
- an alarm transducer comprising a housing and sound generating means disposed inside the housing and arranged to emit high frequency audio sound.
- the high frequency audio sound say in the range of 7-20khz deters insects from entering the alarm housing but is inaudible to the human ear.
- the transducer is less susceptible to false alarms and faults caused by insects.
- the high frequency sound also deters insects from entering the room in which the alarm transducer is mounted and thus aditional insect repulsion apparatus do not need to be provided.
- the invention thus provides a convenient way of detering insects at cost which is neglible over the cost of a conventional alarm transducer.
- the alarm transducer comprises a smoke detector having a smoke sensing chamber or device.
- the smoke detector comprises an audible warning transducer which emits an audible alarm signal when smoke or heat is detected.
- the alarm transducer comprises an audible warning transducer. This type of transducer will also deter insects from entering a conventional smoke detector mounted in the same room or nearby.
- the audible warning transducer is also arranged to emit said audible alarm signal, thereby saving on component costs and size.
- the transducer comprises terminals for connecting to a control panel, which supplies power to the transducer, so that the are no batteries to replace.
- the transducer In the event of a mains power failure, power is supplied to the transducer from a battery, so that the transducer remains operable.
- the transducer preferably comprises means for inhibiting said high frequency audio sound, say in the event of a mains power failure.
- an alarm system comprising a control panel 10 and a plurality of remote transducers 11 connected to a cable 12, which extends from the control panel 10.
- the cable 12 carries data and control signals between the control panel 10 and the transducers 11, as well as carrying power to the transducers 11 from a mains power supply unit 13 in the control panel 10.
- the power supply unit 13 also applies power to a monitoring circuit 14 in the control panel 10.
- the power supply unit 13 is connected to a rechargeable battery 15, which provides standby power to the monitoring circuit 14 and remote transducers 11, in the event of a mains power failure.
- Each transducers 11 comprises an optical smoke sensor 20 having a chamber provided with a smoke inlet.
- a conventional optical sensing arrangement (not shown) is disposed in the chamber for sensing the presence of smoke therein.
- the sensing arrangement is connected to a control circuit 21 in the device 11.
- a rocking armature loudspeaker 22 is disposed in the device 11 and is connected to the control circuit 21.
- the control panel 10 applies power to the transducers 11 and the control circuits 21 therein monitor the output of their smoke sensor 20 for an alarm condition.
- the control circuit 21 in each transducer 11 also generates a high-frequency audio signal and applies it to a loudspeaker or other sounder 22, as long as control pulses are received from the control panel 10.
- the high-frequency sound output by the loudspeaker 22 acts as a deterrent to insects and thus the transducers 11 are less susceptible to faults and false alarms than conventional alarm transducers. The sound that it is emitted is inaudible to humans and thus does not cause a nuisance.
- control circuit 21 When smoke enters the sensor 20 of a transducer 11, the control circuit 21 thereof senses a change in output signal and applies an alarm signal to the control panel 10. The control panel 10 then outputs a control signal which activates each of the transducers 11, such that their control circuits 21 apply a high intensity pulsed audible warning signal to their respective loudspeakers 22.
- the rechargeable battery 15 continues to apply power to the monitoring circuit 14 of the control panel 10 and to the remote transducers 11, so that the alarm system remains operable.
- the monitoring circuit 14 in the panel 10 senses the loss of mains power and ceases to apply the above-mentioned signal to the cable 12, thereby preventing the transducers 11 from generating the insect repellant sound.
- the transducers 11 do not emit an insect repellant sound whilst there is a mains power failure and in this manner the life of the rechargeable battery is extended.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire-Detection Mechanisms (AREA)
- Fire Alarms (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9718547 | 1997-09-03 | ||
GBGB9718547.4A GB9718547D0 (en) | 1997-09-03 | 1997-09-03 | Smoke detector |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0901113A2 true EP0901113A2 (fr) | 1999-03-10 |
EP0901113A3 EP0901113A3 (fr) | 1999-12-29 |
Family
ID=10818371
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98306527A Withdrawn EP0901113A3 (fr) | 1997-09-03 | 1998-08-17 | Répulsion d'insectes |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0901113A3 (fr) |
GB (1) | GB9718547D0 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2093733A1 (fr) * | 2008-02-19 | 2009-08-26 | Siemens Aktiengesellschaft | Détection de fumée à l'aide de deux mesures à lumière diffusée spectrales différentes |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3891962A (en) * | 1971-10-07 | 1975-06-24 | Tritronics 1971 Ltd | Electronic insect controller |
GB2218552A (en) * | 1988-04-09 | 1989-11-15 | Lawrence Vivian Penheiro | Electric light installation |
US5189393A (en) * | 1991-06-07 | 1993-02-23 | The Watt Stopper Inc. | Dual technology motion sensor |
-
1997
- 1997-09-03 GB GBGB9718547.4A patent/GB9718547D0/en active Pending
-
1998
- 1998-08-17 EP EP98306527A patent/EP0901113A3/fr not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3891962A (en) * | 1971-10-07 | 1975-06-24 | Tritronics 1971 Ltd | Electronic insect controller |
GB2218552A (en) * | 1988-04-09 | 1989-11-15 | Lawrence Vivian Penheiro | Electric light installation |
US5189393A (en) * | 1991-06-07 | 1993-02-23 | The Watt Stopper Inc. | Dual technology motion sensor |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2093733A1 (fr) * | 2008-02-19 | 2009-08-26 | Siemens Aktiengesellschaft | Détection de fumée à l'aide de deux mesures à lumière diffusée spectrales différentes |
WO2009103668A1 (fr) * | 2008-02-19 | 2009-08-27 | Siemens Aktiengesellschaft | Détection de fumée au moyen de deux mesures de lumière diffuse spectralement différentes |
Also Published As
Publication number | Publication date |
---|---|
GB9718547D0 (en) | 1997-11-05 |
EP0901113A3 (fr) | 1999-12-29 |
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