Multi-sensor detector with adjustable sensor sampling parameters
First Claim
1. A multi-sensor detector comprising:
- a first ambient condition sensor;
a second, different ambient condition sensor;
control circuits, coupled to the sensors, responsive to a predetermined output from the first sensor for altering at least one of an amplitude drive parameter, a sample time parameter, a frequency drive parameter and a modulation parameter of the second sensor.
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Accused Products
Abstract
A dual sensor detector incorporates a fire sensor, such as a smoke or heat sensor, and a gas sensor. Control circuitry is coupled to the sensors. In response to a sensed fire condition, such as due to heat or smoke, a constant sample rate sampling parameter, such as a sample time interval or a drive amplitude, is increased for the second sensor so as to increase its signal-to-noise ratio and resolution. The second sensor will be operated with the increased sample interval or drive amplitude so long as the first sensor continues to exhibit the detection of a condition. When the first sensor drops outs of the detection of a condition, the alterable parameter of the second sensor is reset to its quiescent state which draws a lower current value.
28 Citations
52 Claims
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1. A multi-sensor detector comprising:
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a first ambient condition sensor;
a second, different ambient condition sensor;
control circuits, coupled to the sensors, responsive to a predetermined output from the first sensor for altering at least one of an amplitude drive parameter, a sample time parameter, a frequency drive parameter and a modulation parameter of the second sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A multi-sensor ambient condition detector comprising:
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a fire sensor;
a gas sensor; and
control circuit wherein a duty cycle parameter of the gas sensor is switched from one value to another in response to a selected output from the fire sensor. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A multi-sensor detector comprising:
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a first, ambient condition sensor;
a second, different ambient condition sensor;
control circuits coupled to the sensors for responding to a condition indicating output from the first sensor by altering a sampling related parameter of the second sensor to increase the signal-to-noise ratio of output signal. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A multi-sensor detector comprising:
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a first ambient condition sensor;
a second, different ambient condition sensor;
control circuits, coupled to the sensors, responsive to a predetermined output from the first sensor for switching the second sensor from a first level of resolution to a second greater level of resolution. - View Dependent Claims (32, 33, 34, 35, 37, 38, 39, 40, 41)
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36. A multi-sensor detector comprising:
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a first ambient condition sensor;
a second, different ambient condition sensor;
control circuits, coupled to the sensors, responsive to a predetermined output from the first sensor for switching the second sensor from a first mode of operation with a first signal-to-noise ratio to a second mode of operation with a second, improved signal-to-noise ratio.
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42. A multi-sensor detector comprising:
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a first ambient condition sensor;
a second, different ambient condition sensor which includes a radiation-emitter and circuitry to sense radiation from the emitter;
control circuits coupled to the sensors, responsive to an output from the first sensor to alter a drive amplitude parameter of the emitter. - View Dependent Claims (43, 44, 45, 46, 47, 49, 50, 51, 52)
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48. A multi-sensor detector comprising:
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a first ambient condition sensor;
a second, different ambient condition sensor which includes a radiation emitter and circuitry to sense radiation from the emitter;
control circuits coupled to the sensors, responsive to an output from the first sensor to alter a drive time parameter of the emitter.
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Specification