摘要:
A support for sensor elements, especially temperature, throughflow or chemical sensors, comprises a supporting element composed of a ceramic material and having at least one throughgoing opening, a thin ceramic foil arranged on the supporting element so as to cover the opening to support a sensor element in the region of the opening.
摘要:
A fast-responding temperature sensor, for measuring temperature of a medium, features a resistance element (12) formed as a film on an insulating substrate (10). The resistance element is disposed in a bubble or dome (11) of ceramic, preferably glass ceramic, which is formed on, and bowed with respect to, the insulating substrate (10).
摘要:
A device for measuring a flowing air quantity is proposed which comprises a sensor element which is exposed to the flowing air, is constructed in thick-film technology and contains a heating film resistor (R.sub.H), which is arranged on an insulating substrate (10) and through which current flows, and a sensor film resistor (R.sub.S) which is likewise arranged on the insulating substrate (10), serves to sense the temperature of the heating film resistor (R.sub.H) and is a component of a bridge circuit. The heating film resistor (R.sub.H) and the sensor film resistor (R.sub.S), separated from one another by an intermediate film (13) which is a good conductor of heat but is electrically insulating, are accommodated in a bubble (11) which is made of ceramic material, in particular of glass ceramic, and is arched on the insulating substrate (10). The thin diaphragm (14) made of a ceramic material ensures effective thermal uncoupling of the film resistors (R.sub.H, R.sub.S) from the insulating substrate (10). Short response times are thereby achieved.
摘要:
An acceleration sensor having a piezoelectric sensor element, which is supported as a flexural resonator in a holding module and whose electrodes are connected to an evaluation circuit. The holding module mechanically fixes the sensor element in position and provides, at the same time, for its electrical contacting.
摘要:
A gas sensor device has a carrier plate of ceramic or glass. The carrier has apertures which leave only strips in a spiral configuration connecting a middle region of the carrier to the outer region thereof. The apertures may be mere slits separating the connection strips or they may be apertures providing larger air gaps. On each middle region so provided on the carrier a sensor element is located that has two electrodes and a sensitive layer which establishes a conducting connection between the electrodes. The electrodes and the sensitive layer are directly applied to the upper surface of the middle region. The two electrodes are comb shaped and are placed in inter-digital configuration to define a meandering gap between them. On the underside of the middle region of the carrier a heating element for the sensor element is provided and, if desired, also a temperature measuring resistance for regulating the temperature produced by a heating resistor. Conducting paths are located on the connecting strips between the middle region and the outer region of the carrier for connecting a sensor element and its heater to circuits on the outer region of the carrier plate.
摘要:
In an acceleration pick-up (11), the bending spring (13) is a substrate plate, e.g. produced from Al.sub.2 O.sub.3, which is arranged at one side on an elevated portion (12) of a support (10) produced from mechanically rigid material. Accordingly, the resistors (19 to 22) and particularly the evaluating circuit (24) on an elevated portion (12) of the support (10) can be arranged jointly on the bending spring (13) and applied in a single work step using thick-film technology. In addition, a cut out portion (14) is formed in the bending spring (13), so that two bending webs (15, 16) can be formed at the greatest possible distance from one another. Two of the resistors (19, 21) are arranged on the bending webs (15, 16) and one of the remaining resistors (20, 22) is arranged in the area of the cut out portion (14). Accordingly, an electrical monitoring of the mechanical state of the bending spring (13) is made possible.
摘要:
An acceleration pickup for releasing occupant protecting devices in power vehicles has a housing, a ceramic plate which acts as a bending spring and is clamped at its one end in the housing, and expansion-sensitive resistances arranged in the ceramic plate. The housing is composed of several layers of ceramic structural parts and is produced by a thick film technique.
摘要:
An electronic device includes a resonant circuit and an evaluation circuit. The resonant circuit includes an acceleration-sensitive sensor which is excited to vibrate during a testing phase of the acceleration-sensitive sensor. The evaluation circuit is coupled to the resonant circuit to determine a performance reliability of the acceleration-sensitive sensor.
摘要:
A sensor device has a quartz tuning fork and an analysis circuit arranged on a common board inside a common housing. The quartz tuning fork has its own, second housing within the common housing for acoustically decoupling the tuning fork from the analysis circuit. The second housing also has an opening for equalizing the pressure and temperature between the second housing and the rest of the common housing. The analysis circuit, which is connected via the electrical wires to the quartz tuning fork, performs linearization, signal amplification and elimination of environmental influences on the signals emitted by the quartz tuning fork. The signals processed by the analysis circuit are further transmitted via common housing's electrical contacts to external elements. Because of the physical proximity of the quartz tuning fork and the analysis circuit, interference attributable to electrical connections between the two elements is minimized. Furthermore, because the tuning fork and the analysis circuit are exposed to the same temperature, temperature-related fluctuations in the electrical signals of the tuning fork may be accurately counter-balanced by the analysis circuit.
摘要:
A shunting element includes two terminal elements for bridging an electrical component, at least one semiconductor component, and at least one electrically conducting layer connecting the semiconductor component to the two terminal elements, the electrically conducting layer being alloyed with the semiconductor component to form a shorting element upon the passage of a current which increases the temperature in the electrically conducting layer and in the semiconductor component to a given value.