摘要:
A sensor for scanning physical processes in a combustion chamber of an internal combustion engine includes a pressure-sensitive element formed by two sapphire small parts one of which has a recess and forms a pressure diaphragm to which resistors are applied. The sensor is formed by means of the silicon-on-sapphire technology.
摘要:
A differential field plate or magnetically responsive resistors (4a, 4b) is so connected that two field plate resistors are serially connected and the common junction (J) thereof is connected to ground or, chassis; the output is taken across the free terminals of the resistance elements (4a, 4b), the resistance elements having a constant current applied thereto. The current is maintained constant for any particular temperature by a closed connecting loop including a comparator (22) comparing the voltage across any one of the field plate resistors (U.sub.A *) with a predetermined voltage (U.sub.o). Noise or disturbance voltages (U.sub.St1, U.sub.St2) are balanced out by the circuit and thus will not affect the output voltage derived across the free terminals of the field plate resistors (4a, 4b).
摘要:
An apparatus is proposed for detecting operating characteristics of an internal combustion engine. It has an optical sensor whose output signal is delivered to an amplifier with a variable transmission behavior. As a result, it is possible to have either a stepped or a continuous adaptation of the sensor sensitivity to various operational points of the engine. It is particularly proposed that the amplification for the measurement signal be selected to be high in the case of an opto-electrical combustion chamber observation in a low load range, while it is selected to be low in a high load range, so that relatively equalized measurement results are available for use.
摘要:
To form a temperature sensor, for example suitable in an automotive vehicle, to determine ambient temperatures, or to provide a temperature compensated thin-film circuit, for example for incorporation with an oscillator circuit, two stable thin-film layers are applied to a non-conductive substrate, the layers being capable of being etched. The overall temperature coefficient of resistance can be matched to a predetermined value by selective interconnection of at least two thin-film resistance elements formed by the thin films, of which one thin film resistance element for example comprises a nickel layer over a tantalum base, with a predetermined temperature coefficient of resistance, the other resistance element merely being the tantalum layer with essentially zero temperature coefficient of resistance, the overall temperature coefficient of resistance of the combination being determined by adjustment of the relative resistance values after measurement of the temperature coefficient of resistance of the nickel-tantalum layer to determine its actual temperature coefficient so that, in spite of tolerances in the manufacture of the thin films, interchangeable elements of highly accurate overall resistance and temperature coefficient of resistance values can be obtained.
摘要:
A Wiegand wire forms part of a stator coil facing a rotor on which permanent magnets are located. The stator coil has two coil portions or coil sections which are wound or connected to provide opposing inductive outputs upon passage of the magnets in front of the coils to cancel each other, the Wiegand wire change of magnetization providing the additional read-out output, the amplitude of which will be independent of speed, but the recurrence rate will depend upon speed of the magnets passing the stator of transducer.
摘要:
A variable inductor having a U-shaped magnetic core with a short-circuiting plate providing a short-circuiting ring for both legs of the core movable along the core legs in response to a displacement to be measured is connected in an electronic circuit to generate oscillation of a frequency that is either directly or inversely proportional to the displacement. For the inversely proportional case, the variable inductance component can be combined with an integrator function and connected to an operational amplifier, for generation of the output frequency with a small number of electrical components. The thickness and spacing of the core legs are varied along their length to produce a highly linear inductive transducer characteristic. The core legs are bent in a circle when it is desired to measure an angular displacement.
摘要:
A belt lock (8) for receiving an attachment element (2) of a safety belt (1) has an insertion opening (10) for the attachment element (2). In the belt lock (8), a connection element (20) is provided, which penetrates a locking opening (3) on the attachment element (2). The connection element (20) is disposed on a flat spring-type carrier (17), via which an insertion movement (24) of the connection element (20) into the locking opening (3) of the attachment element (2) takes place, when the attachment element operates a locking lever (12) by its insertion movement. The insertion movement (24) of the connection element (20) is monitored via a magnetic circuit containing a magnetic field-sensing sensor (31). A component (11, 20) of the belt lock (8) that fixes the attachment element (2) of the safety belt (1) is associated with a measuring element (20), with which a force operating on the belt lock can be determined via the magnetic circuit (16, 31).
摘要:
A device and a method, respectively, are proposed to detect side collisions, in which a temperature sensor is located in a motor-vehicle side section. In case of a side collision, the temperature sensor measures the short-term adiabatic temperature increase and a control device detects a side collision as a function of the measured temperature increase and the temperature gradient. A triggering decision is made by plausibility testing using an acceleration sensor.
摘要:
An arrangement that can be implemented with a simple circuit includes a measuring resistance that can either be connected in addition to a load or connected in place of the load. Furthermore, elements are provided that record the change in resistance resulting from the connection of the measuring resistance and signal when the change in resistance differs from a predefined value.
摘要:
An arrangement for activating a deployment mechanism of a restraint system includes a transfer unit whose secondary side is connected to the deployment mechanism. In order to prevent improper deployments of the restraint system, upstream from the deployment mechanism there is an electrical energy accumulator which is fed by a charging current delivered via the transfer unit. In addition, on the secondary side there is connected to the transfer unit a control circuit which, in reaction to a trigger signal that, in a situation requiring deployment of the restraint system, is delivered from the transfer unit, switches the electrical energy accumulator though to the deployment mechanism.