Robert Boschgmbh

Other

Manfred Rothley

Erich Zabler

Karlheinz Storck

Marion Simon

Robert Hugel

Roland Mueller-Fiedler

Peter Hauler

Kurt Neuffer

Walter Jansche

Karl-Franz Reinhart

Lars Erdmann

Claus-Dietrich Pilch

Wilhelm Leneke

Lothar Bollweber

Joerg' Schieferdecker

Rolf J&auml;hne

J&ouml;rg Schieferdecker

An apparatus for sensing electromagnetic radiation with local resolution for image-producing sensors that can be economically produced and installed is decribed. This is achieved, in that a micromechanically producible optical imaging system is provided.

Apparatus for sensing electromagnetic radiation

Presented is a sensor system for the detection of thermal radiation, with a substrate (,) and several sensor elements (,) on the substrate (,), in which case at least one self-test device (,) is provided in order to generate heat which can be used for the heating of one or more sensor elements (,). The sensor elements (,) can be heated according to a typical time pattern during the self-testing process. Also presented is an advantageous process for the manufacture of the sensor system as well as an advantageous configuration of the total system, including signal processing.

Sensor system and manufacturing process as well as self-testing process

Circuit arrangement for transmitting measurement values on vehicle wheels

To simplify a field plate effect speed and position sensor, particularly for association with the starter gear of an automotive-type internal combustion engine, four meander-arranged permalloy resistance tracks are located on a substrate at the corners of a rectangle, spaced, in circumferential direction, by about half the pitch distance of the teeth (2) of the starter gear. The resistances can be connected in a voltage divider (FIG. 4) configuration, or in form of a bridge circuit (FIG. 5) supplied from a constant current source (CC) to eliminate temperature variation affects, and providing alternating current output voltages within the wide range of temperature of essentially uniform level as the teeth (2) scan the sensor, a special marker tooth (10) providing an output signal of different level. Preferably, the resistances (5-8) are formed as meander-shaped thin film vapor deposited tracks on a silicon substrate (4), a permanent magnet (9) providing bias magnetization, the direction of which changes with respect to the orientation of the meander tracks--preferably 45.degree. with respect to the direction of rotation (11) to cause the resistance elements to either have high, or low resistances (FIG. 3).

Gear tooth position and speed sensor with four, bridge circuit

To determine the rotary speed of a toothed element (1), for example the starter gear of an internal combustion (IC) engine, or a toothed wheel coupled to a wheel of a vehicle for evaluation of the speed, and change in speed thereof, for use in a brake anti-block system, a magnetic field is generated, for example by a permanent magnet (3) which has both radial and tangential components with respect to the teeth (2) of the rotary element. A magnetic field dependent sensor (4) such as a Hall generator or a thin-film permalloy-type magneto-resistive sensor is positioned to respond to the tangential component of the magnetic field, to thereby eliminate shifts in the null or center line about which the field strength undulates as the disk rotates to permit ready evaluation of the output from the sensor by threshold circuitry.

Rotary speed sensor with Hall generator responding to tangential

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Kraichtal, Germany

Manfred Rothley