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Reversing alarm

a technology of reversing alarm and reversing sound, which is applied in the field of reversing alarm to achieve the effect of facilitating the location of sound sources and increasing the usefulness of reversing safety alarm

Inactive Publication Date: 2014-05-27
BRIGADE ELECTRONICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is a reversing alarm for a vehicle that produces an audible signal containing broad band sound (BBS). The use of BBS to determine the location of the noise source has been disclosed in previous patents. The reversing alarm has several advantages, including faster dissipation of noise, greater audibility, and reduced noise nuisance. The alarm also has a narrower bandwidth, making it more efficient and cost-effective. It includes a muting circuit for producing pulsed bursts of sound that are easy to detect, a clipper circuit for reshaping the corners of the pulsed signal, and a voltage regulator to protect the alarm from power fluctuations. The components of the alarm are mounted on the exterior of a vehicle for easy installation.

Problems solved by technology

It is known that the human ear and brain can process BBS in such a way that the location of the noise can be determined, whereas this is not possible with a sound containing only one or a few frequencies.

Method used

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Examples

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Embodiment Construction

[0030]FIG. 1 shows a block diagram of a voltage regulator 10 having an input indicated at 12 and an output indicated at 14. The input voltage is taken from a standard vehicle battery producing nominally 12 V DC or possibly 24 V DC. The voltage regulator 10 accepts the input voltage, which can vary according to the condition of the battery between say 9 V DC and 28 V DC, and regulates and stabilises it to produce an output voltage of approximately 8 V DC. This output voltage is used to power the reversing alarm according to the present invention. Thus the alarm is powered by a vehicle's existing ordinary battery, and no additional power source is required.

[0031]FIG. 2 shows an embodiment of an alarm according to the present invention, in block diagram form. The blocks represent various components of an electronic circuit.

[0032]The circuit is powered by the 8 V DC supply derived from the voltage regulator 10, this voltage being feed to each block (connections not shown).

[0033]A high v...

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Abstract

A reversing alarm for a vehicle emits an audible signal in the form of pulses of broad band sound when the vehicle is put into reverse gear. The broad band sound allows persons in the vicinity to locate the vehicle, as the human brain is able to process broad band sound to pinpoint the location of the sound source in a way which is not possible with single tone sounds. The alarm is implemented via a simple electronic circuit which uses a zener diode as a signal generator 20 to generate the broad band sound.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application is a continuation of PCT / GB01 / 01196 filed on Mar. 19, 2001, which is incorporated herein by reference.[0002]The present invention relates to a reversing alarm for a vehicle.BACKGROUND OF THE INVENTION[0003](1) Field of the Invention[0004]It is widely recognised that safety is greatly increased if a vehicle has some form of alarm fitted which operates to warn people when the vehicle is reversing. This applies to many types of vehicles, including cars, vans, lorries, and buses, and also light and heavy mobile plant such as tractors, fork-lift trucks, dozers and loaders.[0005]Such alarms typically take the form of either a light and / or an audible sound which is operated when the vehicle is put into reverse gear. Ideally, the alarm is activated automatically by engaging reverse gear. Previously proposed alarms have combined both light and sound, so that the presence of a reversing vehicle is apparent even if the vehicle is out...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): B60Q1/26B60Q1/22B60Q5/00G10K9/12G10K15/04H04R1/00H04R1/02
CPCB60Q1/22B60Q5/00
Inventor HANSON-ABBOTT, CHRISTOPHERYAMASHITA, MASATO
Owner BRIGADE ELECTRONICS
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