In a connection arrangement between a sensor and connection leads, only a small installation space is required. To this end, the connection arrangement has a signal amplifier, which is electrically contacted by means of bond connections with the sensor and the connection leads. This is achieved by means of connecting elements, which are designed as thin sheet-metal shaped parts and are fixed with tab-shaped end sections in a housing of plastic, in which the signal amplifier is also inserted. The...

Disclosed is an apparatus for generating a pulse train whose instantaneous repetition rate represents the instantaneous angular velocity of a rotating device. An oscillator feeds a high frequency signal to a coil through which a center pole of magnetic material projects. The rotating device causes an object such as a gear to rotate, at least a portion of the extremity of which (e.g., the tips of its teeth, in the case of a gear) repeatedly comes into close contact with the tip of the center pole...

An apparatus for detecting displacements of existing movable bodies made of ferromagnetic materials and magnetized by external magnetic fields, comprising a magnetic sensor disposed in the vicinity of the movable body for detecting change in the magnetic field caused by the motion of the body, and a processor for converting the outputs of the magnetic sensor into pulse signals.

The drive has a switching logic which includes a means for producing a correction signal in response to the switching-in of the motor. This correction signal serves to compensate for the kinetic energy of the moving parts of the drive by moving up the lower limit valve of an error signal (derived from the difference between the actual value of the adjusting element position and a fixed value) so as to permit more accurate switching-out and stopping of the motor. Other features are added to preve...

A system for detecting the rotational speed of a rotating body comprising the steps of generating two kinds of signals A and B having alternating wave forms and corresponding to the rotational speed of the rotating body by means of position-detecting devices (5a, 5b), the signals A and B having the same amplitude and having phases deviating by 90.degree., producing switching signals S(A), S(A), S(B), and S(B) from the signals A and B by means of zero-cross circuits (711, 712), producing inverted...

A wheel speed sensor apparatus for detecting the rotational speed of a road wheel of an automotive vehicle. The apparatus includes a toothed rotor rotatable with a road wheel of the vehicle. A sensor main body contains an element which produces an electical signal in response to adjacent passage of the rotor teeth upon rotation of the sensor rotor. The sensor main body is fitted inside inside a metallic sleeve in a manner such that a tip end section of the sensor main body is in close proximity ...

A cycle time of pulses converted from an electrical signal generated at a rotational sensor is counted. In determining a cycle of the pulses, either a rising edge or a falling edge of the pulse is selected. As the selection of the either edge affects accuracy of the rotational speed measurement, two modes are proposed. One is suitable for a lower speed range in which either of the rising and falling edges is selected for every pulse monitoring period considering the relative phase position of th...

A device for sensing the input shaft speed of an automotive automatic transmission that is driven by the engine through the fluid coupling of a torque converter. The speed sensor device includes circumferentially spaced markings about the transmission input shaft and a speed sensor that is placed at close proximity to the circumferentially spaced markings through a hole in the torque converter stator shaft. An electronic control unit (ECU) analyzes the sensor output signal and in the case of an ...

A tachometer system in which a carrier signal is transmitted to a speed sensing and transmission-line-length compensating device. Bursts of the carrier signal are relayed by the device to a detector and comparator circuit where a signal is recovered indicating the rate at which objects pass the speed sensing device. A method of compensating for differences in transmission line length in different systems by tuning the speed sensing device to a resonant frequency greater than the frequency of the...

The following specification describes an alternator operated tachometer utilizing an air core gauge driven by a saturable transformer having one or more choke coils selectively connected to the transformer primary for providing a relatively constant energy input to the transformer independent of alternator output voltage or the use of a battery with the alternator. A housing within the tachometer magnetically insulates the gauge and the arrangement for mounting the components provides space savi...