Robert Boschgmbh

Dieter Meyer

Ehrenfried Fabry

Klaus Krockenberger

Ulrich Kanzler

Werner Wiedemann

Hans Petermann

Juergen Leinberger

George Goddard

Dieter Faber

Georg Goddard

Bernhard Pirkl

In a two-wire line between a transmitter and a receiver, voltage or current pulses are used to transmit information, the content of which is contained in the period duration. This is achieved in that a transmitter connects or disconnects the operating voltage for a receiver using a switch. It is not necessary to have a digital-analog conversion or the reverse. Furthermore, a high pulse-duty factor is used, so that the supplying of the receiver is always guaranteed.

Circuit arrangement for transmitting information on a two-wire line

In a device for measuring the distance to an obstacle, a second transmission pulse as a control measurement for an ultrasonic distance measurement is transmitted only when an echo signal has been received for a first transmission pulse. In addition, a timing window, within which the expected echo signal falls when it is reflected by an obstacle, is created. In this manner, interference signals are advantageously suppressed and the measuring time is accelerated, so that for an application in a motor vehicle to measure distance, a current measured value is always known while the vehicle velocity and the path covered are taken into consideration.

Method and device for ultrasonic distance measuring

Liquid crystal indicator, preferably for motor vehicles

Display apparatus with liquid crystal cells, preferably for motor

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Feucht, Germany

Dieter Meyer