Data processing: speech signal processing – linguistics – language – Speech signal processing – Application
Patent
1997-04-04
1999-11-09
Hudspeth, David R.
Data processing: speech signal processing, linguistics, language
Speech signal processing
Application
704273, 364426041, 364460, G10L 506
Patent
active
059831880
DESCRIPTION:
BRIEF SUMMARY
1. FIELD OF THE INVENTION
The present invention is directed to limiting the speed of an automobile via voice-activated control.
2. DESCRIPTION OF THE RELATED ART
When an automobile is being driven, above all in built-up areas, very severe demands are made of the vehicle driver. He must constantly observe the traffic situation and be aware of rapid changes to which he must adapt his driving behavior. In addition, he has to pay attention to traffic symbols and signboards, and this may be very difficult, above all in strange districts, especially when he also has to recognize and comply with road signs as well. Finally, the vehicle driver should also comply with the general speed limit and, where appropriate, speed limits differing from this and even changing frequently, and he should operate his vehicle accordingly, without causing a traffic obstruction by driving too slowly.
SUMMARY OF THE INVENTION
The object on which the invention is based is to make it easier for the vehicle driver at least to adhere to the speed limit applicable in each case.
This object is achieved by a method for limiting the speed of an automobile. The method includes the steps of, during a preparatory phase: a) during driving at a selected speed, a voice signal corresponding to the selected speed signal is uttered, b) the voice signal is converted into a primary electronic voice value signal by means of a sound recorder, and c) a speed signal corresponding to the selected speed is generated as a limit value signal by a signal converter. Both the primary voice value signal and the limit value signal are stored in relation to one another as a pair of signals in a signal memory by actuating a memory key. The method also includes the steps of, for speed limitation during travel, a) a voice signal corresponding to the selected limit signal is uttered, b) this voice signal is converted into a secondary voice value signal by means of the sound recorder, c) the secondary voice value signal is supplied to a control device and is compared in a first comparator with the primary voice value signal, and, if the two voice value signals coincide, a coincidence signal is generated. If there is a coincidence, the limit value signal is compared in a second comparator with the actual speed signal corresponding to the speed in operation and a difference signal is formed from it, and, in the event of a negative difference signal, an actuating signal is generated, by means of which a regulator reducing the supply of energy to the engine is actuated.
The method may further include, in the preparatory phase, a) during driving at a plurality of selected speeds, a voice signal is uttered corresponding to the selected speed in each case, b) each voice signal is converted into a primary electronic voice value signal by means of a sound recorder, and c) a speed signal corresponding to the selected speed in each case stored in relation to one another as a pair of signals in a signal memory by actuating a memory key.
The memory may further include the step of generating, by a manually actuable signal generator, the selected limit value signals on the basis of a manual setting.
The method may further include the step of, when the memory key is actuated for storing the respective pair of signals, an inactivating signal is generated which temporarily inactivates the comparators of the control device.
The method may further include the steps of, a) at the start of the preparatory phase, a setting switch is set to the `storage` position, as a result of which the signal lines to the comparators of the control device are interrupted, and b) after the conclusion of the preparatory phase, the setting switch is changed over to `operation` position again.
The method may further include the step of, when the memory key is actuated for storing the respective pair of signals, the primary voice value signal is at the same time also stored in a separate memory and is transmitted from this memory to the control device as a secondary voice value signal only after the releas
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Chawan Vijay B.
Hudspeth David R.
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