Self-contained detection method and device
First Claim
1. An autonomous detection device for detecting smoke, gas, fire or flames, comprising:
- a sensor sensitive to smoke, gas, fire or flames;
a power supply;
an alarm emitting an alarm signal when the sensor detects smoke, gas, fire or flames;
an acousto-electric transducer only activated, when the sensor does not detect smoke, gas, fire or flames, at time intervals to receive an acoustic signal and to emit an electrical signal representative of the acoustic signal; and
a controller for recognizing a predefined acoustic signal according to the electrical signal emitted by the transducer and triggering an emission of a state message by the alarm, when the sensor does not detect smoke, gas, fire or flames, to confirm that the detection device is operating correctly and when the predefined acoustic signal is recognized.
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Accused Products
Abstract
The detection device comprises a sensor, a power supply, an alarm and an acousto-electric transducer. The activated acousto-electric transducer receives an acoustic signal and emits an electrical signal representative of the acoustic signal. The detection device further comprises a means of recognizing a predefined acoustic signal according to the electrical signal emitted by the transducer and triggering an emission of a message by the alarm when the predefined acoustic signal is recognized. The acoustic-electric transducer is only activated at regular intervals. Preferably, the transducer also serves an alarm to emit the message when the predefined acoustic signal is recognized.
12 Citations
18 Claims
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1. An autonomous detection device for detecting smoke, gas, fire or flames, comprising:
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a sensor sensitive to smoke, gas, fire or flames; a power supply; an alarm emitting an alarm signal when the sensor detects smoke, gas, fire or flames; an acousto-electric transducer only activated, when the sensor does not detect smoke, gas, fire or flames, at time intervals to receive an acoustic signal and to emit an electrical signal representative of the acoustic signal; and a controller for recognizing a predefined acoustic signal according to the electrical signal emitted by the transducer and triggering an emission of a state message by the alarm, when the sensor does not detect smoke, gas, fire or flames, to confirm that the detection device is operating correctly and when the predefined acoustic signal is recognized. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 18)
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16. An autonomous detection method utilizing a sensor sensitive to smoke, gas, fire or flames, a power supply and an alarm emitting an alarm signal when the sensor detects smoke, gas, fire or flames, the method comprising the steps of:
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activating an acousto-electric transducer only, when the sensor does not detect smoke, gas, fire or flames, at time intervals; receiving an acoustic signal by the activated transducer; and recognizing a predefined acoustic signal and triggering an emission of a state message by the alarm, when the sensor does not detect smoke, gas, fire or flames, to confirm that the detection device is operating correctly and when said predefined signal is recognized.
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Specification