Avl List Gmbh

Paul Kirschbaum

Klaus-Christoph Harms

Josef Glaser

Klaus Leitmeier

The invention involves a marked plate for a rotational angle sensor element for rotating structural parts, with many angle marks provided preferably oriented radially to the rotational axis and preferably arranged in the form of a collar arranged concentrically to the rotational axis and with at least one reference mark, which is formed by an angle mark that deviates in its modulating properties and thus is integrated in the collar of the angle marks. An angle sensor element system for rotating structural parts includes a marked plate that can be coupled to the rotating structural part and that merely has a collar of angle marks with integrated reference marks and a fixed scanning unit for it, including at least one transmitter of electromagnetic radiation and at least one receiver for the radiation modulated by the marked plate, as well as mechanisms for connection to an evaluation unit. In order to distinguish the reference marks with certainty from the remaining angle marks, a process for determining a reference value from an analog signal provides that for each angle and reference mark, from an analog peak value of the preceding angle marks, an peak value continuing the trend of peak values is determined and is used in the evaluation unit, changed by a defined value, as a threshold for the presence of the reference value that deviates in its modulation.

Marked plate for a rotational angle sensor element, an angular sensor element for rotating structural parts, and a process for determining a reference value

A sensor used especially for the measurement of the internal pressure of injection lines of diesel engines comprises two housing parts which are connected via an articulation and can be clamped to the line with a tension device. For simple and in particular one-handed attachment of the sensor in every state of opening or closing, the tension device is located in the same sector, facing the articulation, on one side of the external region of the tube. The connecting plug for the discharging of the measuring signals is preferably insertible in the correspondingly fashioned articulation and can be locked there.

Sensor for measuring the internal pressure of hollow bodies

A sensor is provided that can be used for measuring the internal pressure of injection lines of diesel engines includes two housing parts that are connected via a joint and can be clamped to the injection line using a clamping device. At least one electrical measuring element is pressed, in essentially uniform elastic fashion, onto the surface of the hollow body to be measured. The sensor also includes a support element that operates essentially in radial fashion. A protective film is arranged between the surface and the measuring element. The protective film has a thickness greater than or equal to the radial dimension of foreign bodies or the like that are to be expected on the surface of the hollow body to be measured. The protective film consists of plastic with a low modulus of elasticity. In this way, impurities, burrs and the like on the tube can easily be 'embedded' in the protective film, which, as a result of the low elasticity modulus, nonetheless still ensures a sufficiently good transmission to the measuring element of the surface expansions actually to be measured.

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Seiersberg, Austria

Paul Kirschbaum