Vehicular emergency vehicle alarm apparatus
First Claim
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1. A vehicular mountable apparatus for detecting vehicular speed monitoring signals and for detecting nearby emergency vehicles comprising:
- a first sensor for sensing modulated light from an emergency vehicle warning light and generating an alarm signal in response;
a second sensor for sensing a vehicular speed monitoring signal and generating a ranging signal in response; and
an alarm coupled to the first and second sensors for issuing an alarm in response to generation of any of the ranging signal and the alarm signal.
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Abstract
An apparatus for detecting vehicular speed monitoring signals and for detecting nearby emergency vehicles includes a first sensor for sensing modulated light from an emergency vehicle warning light and generating an alarm signal in response; a second sensor for sensing an incident vehicular speed monitoring signal and generating a ranging signal in response; and an alarm coupled to the first and second sensors for issuing an alarm in response to generation of any of the ranging signal and the alarm signal.
93 Citations
20 Claims
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1. A vehicular mountable apparatus for detecting vehicular speed monitoring signals and for detecting nearby emergency vehicles comprising:
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a first sensor for sensing modulated light from an emergency vehicle warning light and generating an alarm signal in response; a second sensor for sensing a vehicular speed monitoring signal and generating a ranging signal in response; and an alarm coupled to the first and second sensors for issuing an alarm in response to generation of any of the ranging signal and the alarm signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A vehicular mountable apparatus for detecting vehicular speed monitoring signals and for detecting nearby emergency vehicles comprising:
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a sensor for sensing a laser light vehicular speed monitoring signal and generating a laser light ranging detection signal in response and for sensing a modulated light signal from an emergency vehicle warning light and generating an alarm signal in response; and an alarm coupled to the sensor for issuing an alarm in response to generation of any of a laser light ranging signal and an alarm signal. - View Dependent Claims (16, 17, 18)
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19. A vehicular mountable apparatus for detecting nearby emergency vehicles comprising:
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a sensor for sensing incident modulated light from an emergency vehicle warning light and generating an alarm signal in response; an alarm coupled to the sensor for issuing an alarm in response to generation of an alarm signal; and a demodulator connected between the sensor and the alarm for demodulating signals produced by the sensor and for generating an alarm signal only when the incident light is modulated at a frequency to which the demodulator is responsive, the demodulator including a pulse counter coupled to the sensor for counting pulses produced by the sensor in a fixed length time period and an AND gate receiving the outputs of the pulse counter and the sensor for comparing pulses counted in the fixed length time period to at least one frequency to which the demodulator is responsive and for rejecting frequencies not corresponding to the modulated frequency to which the demodulator is responsive. - View Dependent Claims (20)
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Specification