Robert Boschgmbh

Axel-Werner Haag

Uwe Konzelmann

Manfred Strohrmann

Hans Hecht

Gerhard Hueftle

Hans Beyrich

Rolf Reischl

Reinhold Herrmann

Edda Sommer

Alexander Markov

Joerg Brueckner

Hans Loistl

Kurt Weiblen

Wolfgang Kienzle

Klaus Reymann

Josef Kleinhans

Dieter Tank

Norbert Schneider

Stefan Lehenberger

Manfred Lembke

Helmut Bassler

Frank Steuber

Achim Briese

Michael Rittmann

Wolfgang-Michael Mueller

Thomas Schwartzkopff

Waldemar Guenther

Marco Neuscheler

Alexander Kromer

Holger Unger

Michael Eppler

Bastian Bodenberger

Karl Wenzel

Henninge Marberg

Guenther Frick

Anke Fleischer, Legal Representative

Marie-Luise Beck, Legal Representative

Hildegard Nelson, Legal Representative

Metin Guerer

Guido Kleinhans, Legal Representative

A sensor is provided for determining at least one parameter of a fluid medium flowing through a measurement channel, in particular an intake air mass flow of an internal combustion engine. The sensor has a sensor housing, in particular a plug-in sensor that is inserted into or is insertable into a flow tube, in which sensor a measurement channel is fashioned, and has at least one sensor chip situated in the measurement channel for determining the parameter of the fluid medium. The sensor housing has an electronics compartment for accommodating an electronics module and has an electronics compartment cover for closing the electronics compartment. The electronics compartment cover has, at least in part, electrically conductive properties. For example, the electronics compartment cover is placed onto the electrical ground of the sensor and, viewed in projection, partly or completely covers the sensor chip.

Sensor for determining at least one parameter of a fluid medium flowing through a measurement channel

A sensor for determining at least one parameter of a fluid medium, in particular an intake air mass flow of an internal combustion engine, flowing through a measuring channel is provided. The sensor includes a sensor housing, in particular a plug-in sensor that is introduced or introducible into a flow tube and in which the measuring channel is formed, and at least one sensor chip situated in the measuring channel for determining the parameter of the fluid medium. The sensor housing includes an electronics compartment for accommodating an electronic module, and an electronics compartment cover for closing the electronics compartment. The electronics compartment cover has electrically conductive properties at least in part. The electronic module is electrically conductively connected to an interior of the electronics compartment cover.

Sensor for determining at least one parameter of a fluid medium flowing through a measuring channel

A circuit system for measuring a sensor element capacitance of a sensor element, in particular of a capacitive humidity sensor, including: the sensor element, which has the sensor element capacitance; a charge storage element, which is connected directly, or only via a resistor element, in series to the sensor element; and a control unit, which is configured to charge the charge storage element to a reference voltage and to successively transfer the charge via the sensor element capacitance until the charge storage element has reached a particular comparison voltage, the sensor element number of transfer processes thus ascertained representing information about the sensor element capacitance of the sensor element.

Circuit system for measuring a sensor element capacitance

A method for correcting an oscillator frequency of in particular a digital transmitter/receiver interface for transmitting measurement signals of a sensor to a control unit. The method includes outputting of a first reference frequency signal by the sensor, the first reference frequency signal and comparing it with a second reference frequency signal by the control unit, calculating a correction factor on the basis of the first and second reference frequency signals, and correcting the frequency signals representing actual measured quantities subsequently sent by the sensor and received by the control unit based on the calculated correction factor to obtain corrected frequency signals.

Method for correcting an oscillator frequency

Methods and/or devices for detecting the flow rate of a flowing medium, in particular the flow rate of a flowing air mass, are described, in which the flowing medium is detected with two evaluation methods that operate according to different principles and the two measurement signals obtained are set in relation to each other in order to determine correction methods. Since the two measurement methods react differently to interference effects, the comparison of the two output signals permits conclusions to be drawn as to the type and the order of magnitude of the interference effects and a corrected measurement signal can be obtained, which is independent of the interference effects.

Method and device for determining the throughput of a flowing medium

A measuring device, with a digital interface for the transmission of digital signals to an evaluation unit, is disclosed, whereby the interface includes a clock input, to which a system clock signal is fed, a signal input, to which a measured signal is applied, an arithmetic unit, which derives an output signal from the clock signal and measured signal, and a signal output where the output signal is output and transmitted to the evaluation unit. Measurement accuracy may be improved by transmitting a reference signal that is a signal derived from the clock signal, and using this reference signal to correct the output signal.

Measuring system with ratiometric frequency output

The invention proposes a device for measuring the mass of a flowing medium, in particular the mass of air aspirated by internal combustion engines. The device has a platelike sensor element which is accommodated in a recess of a sensor carrier, and which with a sensor region that has at least one measuring resistor is exposed to the flowing medium in order to measure its mass. The sensor element is accommodated essentially flush in the recess and is retained in the recess by being glued to a bottom face in the recess. The bottom face of the recess of the sensor carrier has a troughlike indentation, which extends at least partially along the circumference of the sensor element outside the sensor region that has the at least one measuring resistor. The device according to the invention is intended to measure the mass of a flowing medium, in particular for measuring the mass of air aspirated by internal combustion engines.

Flow rate meter

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Stuttgart, Germany

Axel-Werner Haag