Abstract: A system for measuring a vehicle's height above ground level including a sensor which is preassembled and incorporated in the shock absorber of the vehicle eliminating assembly operations and fasteners in attaching the unit to the vehicle and protecting the sensor from impacts and the action of external agents due to its shielded position within the shock absorber.

Abstract: A transformer device for the detection of vehicle attitude, comprising a signal sensor, which is arranged inside the cylinder of the shock absorber coaxially with the piston thereof. The sensor cooperates with an amplifier for amplifying the detected signals. The sensor includes a differential transformer comprising a primary AC-fed coil and two secondary coils each having one of their ends electrically connected to the other. The remaining end of each secondary coil is electrically connected to the amplifier to which the output sensor signal is applied to be amplified, before being applied to the output of the device. The signal is a function of the voltage induced voltage in the secondary coils of the differential transformer which is determined by the piston position with respect to the primary coil and secondary coil and thereby the relative positioning of the piston inside the shock absorber cylinder.

Abstract: A circuit for the detection of vehicle attitude, comprising a signal sensor, which is arranged inside the cylinder of a shock absorber and coaxial with the piston thereof. The sensor cooperates with a processor for receiving and processing the sensor signals. The sensor includes a first coil electrically connected to a second coil. The free ends of the coils are electrically connected to capacitive circuit means so as to form a variable-frequency resonant circuit fed by an AC power supply through suitable terminals. The circuit is connected to the inputs of parallel processors which convert the frequencies of the variable signal controlled by the sensor and of the fixed signal provided by the power supply to variable-voltage signals, respectively. Both converted signals are applied to a comparator circuit at the output terminals of which any voltage change is measured so as to detect any relative position change of the piston with respect to the cylinder.

Abstract: A system for measuring a vehicle's height above ground level including a sensor which is preassembled and incorporated in the shock absorber of the vehicle eliminating assembly operations and fasteners in attaching the unit to the vehicle and protecting the sensor from impacts and the action of external agents due to its shielded position within the shock absorber.