Preh-werke Gmbh Co. Kg

Preh Gmbh

Prkh Gmbh

Hans-Michael Schmitt

Thomas Polzer

Juergen Bach

Martin Blaufuss

Oswald Reuss

Gottfried Berthold

Rudolf Hartmann

Annegret Suckfuell

Klaus Hemmert

Bernhard Knuettel

Guenther Oennig

Anton Ruettiger

Maik Rienecker

Bernhard Knüttel

Sandro Krempel

Jochen Gans

Claudia Wolny

Nicole STÜTZE

Michael Reiser

Martin Hauck

Andrej Afanasjevas

An apparatus is provided for measuring wear-induced displacement of a brake lining with respect to an associated brake caliper, comprising a gear mechanism for converting the wear-induced displacement into a rotary movement, having a sensor for detecting the rotary movement, wherein a contact-free coupling is provided for transmitting the rotary movement to the sensor. The apparatus is designed in such a way that the sensor generates an analogue or pulse-width-modulated detection signal for determining the wear-induced displacement of the brake lining, wherein the detection signal corresponds to the respective displacement caused by the rotary movement. The invention also related to a corresponding method for measuring the wear-induced displacement of a brake lining with respect to an associated brake caliper.

Brake lining wear sensor

A capacitive rain sensor for a motor vehicle is provided that includes a printed circuit board with sensor structures laminated thereon and with electronic components, wherein the sensor structures and the electronic components are arranged on different sides of the printed circuit board.

Capacitive rain sensor

Conductive adhesive bonds are used preferably where the contact bonds are subject to great temperature variations, for example, on a throttle valve controller. In order to increase the mechanical stabilization of the conductive adhesive bonds, the surface of the contacts are machined and provided with structures such as ribbing, prickles, etc. As a result of this structuring, the conductive adhesive interlocks mechanically at these points. This leads to a high contact reliability also at extreme temperature changes.

Conductive adhesive bond

The mechanical connection of contacts through induction soldering is improved. To which end, a plastic dome is produced through preliminary encapsulation by injection molding of at least one contact and subsequent final encapsulation, where the two contact geometries to be joined can, for example, be premated. With an appropriate solder preform, the plug-in connection can be secured through induction soldering by enclosing this dome. The appropriate tool is then placed over the plastic dome, by which the heat generated melts the solder preform and securely joins the two contacts to one another.

Method of improving connection of contacts

The regulated heating and air conditioning installations normally enable, when controlled, integration of the main factors affecting the comfort of passengers, in particular preventing the windscreen and the other windows from getting clouded. In order to detect incipient mist formation, condensation and moisture sensors generate detection signals, which initiate steps for preventing mist formation when a threshold value is exceeded. Measures are taken for preventing mist formation based on requirements and in a manner adapted to the changing moisture conditions of the glass panes, for example, by using points of intervention stored in a processor. Steps are therefore taken to prevent mist formation, based on moisture variation gradients of the glass panes. Depending on the moisture of the glass panes varying in time and in terms of values, each point of intervention is generally set on as soon as possible, but the latest possible, the local conditions and local meteorological elements being taken into consideration when the method is applied.

Method and apparatus for preventing fogging on the windows of a motor vehicle

The invention relates to a sensor unit for detecting the wetting of a window. Signals from the condensation sensor are used to control an air conditioning, heating, and/or ventilation unit. The signals of the rain sensor, on the contrary, are used to control a windshield wiper or washing unit for vehicles. A sensor unit, which comprises two sensors, is placed on the interior of the window. In a preferred variant, both are coupled to a common switchable evaluation unit, so that through mutual evaluation of the two sensors or their signals, both incipient condensation on the interior of a vehicle window and the wetting of the exterior, e.g., by rain, is detected. In an improvement of the invention, both sensors are integrated into a sensor module.

Sensor unit for detecting the wetting of a window

As is well known, the influencing variables most important for a sense of comfort are considered during regulation in controlled heating and air conditioning units. Incipient condensation on the windshield or other windows in particular is to be prevented thereby. Sensor modules, inter alia, are employed for this purpose, which have, for example, a capacitative thin-layer sensor. An additional thermopile is provided for determining the window temperature. The present idea eliminates the determination of the window temperature, for which purpose a sensor working capacitatively in the exemplary embodiment is brought directly to the window temperature and a direct thermal coupling of the sensor with the window occurs via a metal plate connected directly to the sensor and a thin adhesive film. The metal plate can thereby form one of the electrodes of the sensor itself or be connected to said electrode in a direct thermal manner. The use of the sensor in the sensor module is a further preferred embodiment.

Sensor for detecting condensation and use in a sensor module

A capacitive sensor for detecting surface condensation which includes a carrier ( ), a metal layer ( ) applied to the carrier ( ) to form an interdigital structure, a passivation layer ( ) formed over the metal layer ( ), and a hydrophilic layer ( ) applied over the passivation layer ( ), where the hydrophilic layer ( ) increases a surface tension of the passivation layer ( ).

Capacitive sensor for detecting surface condensation

In known sensors, 'failure' conditions led to approximately a 10 fold amplification of the failures. Contrary to this, a rotation-angle sensor of this invention provides a rotation-angle sensor housing (5) held within a component cover (1) to have translatory movement, with a rotation-angle-sensor shaft (3) and a component shaft (6) being coupled via a coupling piece (7). Each shaft end (8, 9) of the coupling piece has flat-edge portions, with one shaft end (9) having many more of flat-edge portions than does the other shaft end (8). The rotation-angle-sensor shaft (3) and the component shaft (6) have complementary recesses for receiving the shaft ends. This rotation-angle sensor is particularly adapted to be used for monitoring brake lining of vehicles.

Rotation-angle sensor for displaying a plurality of rotations of a shaft

A diode mount for an LED (2) with a plug connector (3) and compensating resistor (4) is manufactured by injection molding a one piece housing and mounting an LED and plug connector therein. An electrical connection between the LED and the plug connector, as well as a mechanical fixing, is accomplished by an electrically-conductive paste (5). At the same time, the electrically-conductive paste forms the compensating resistor.

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Muennerstadt, Germany

Hans-Michael Schmitt