great effect of three way catalytic convertor (twc) performance on oxygen sensor output voltage has made the sensor (located after catalyst) as the main signal in almost all today’s twc monitoring algorithms. in this paper output voltage of nonlinear oxygen sensor is estimated using a nonlinear autoregressive with exogenous inputs (narx) model. the estimation uses ecu calculated exhaust gas flo...

Dimensional Discrepancies Overrolling of Debris Corrosion Other Fatigue Absrrucr-The development of an in-line, full flow oil debris sensor for aircraft engine condition assessment is described. First used on the F22 fighter, this sensor is the only “ all-metals” debris detector in production. The sensor is based on an inductive measurement technique which enables the system to detect, count an...

We have developed WaterWOLF, a new electronic system and signal processing algorithm for evaluating flow components in pipes. These techniques nonintrusively convert an existing flow meter into a high resolution wireless meter for determining flow rates in real-time. These techniques exploit new tunneling magneto-resistive materials (TMR) for detecting very small magnetic fields generated by ce...

In this study, the radio frequency (R. F.) sputtering system and screen printing technology were used to fabricate the arrayed pH sensor. And the glucose oxidase (GOx) enzyme was immobilized on the arrayed pH sensor as the arrayed glucose biosensor. Furthermore, the computer numerical control (CNC) technique was used to fabricate the microfluidic mold. The differential reference electrode can p...

in this study, using sound created by wheat grain passing through a pipe, wheat flow rate was measured. the developed device consists of a hopper, metering device, sound sensor, delivery tube, dc motor and power supply. several wheat mass flow rates were tested and the sound signal created by the passage of the grain through the discharge tube was measured and transferred to a computer using da...

A system using low-cost and off-the-shelf electronic components for measuring very low flow rates of liquids is reported. The system records the time duration a liquid column needs to travel, in a transparent capillary, between two optical sensors. The average flow rate is then calculated from the time duration, the distance of the two sensors, and the diameter of the capillary. Our first proto...

In response to a magnetic field impulse, magnetostrictive magnetoelastic sensors mechanically vibrate. These vibrations can be detected in several ways: optically from the amplitude modulation of a reflected laser beam, acoustically using a microphone or hydrophone, and by using a pickup coil to detect the magnetic flux emitted from the sensor. Earlier work has shown that the resonant frequency...

In this paper, we present a novel micromachined hot-film flow sensor system realized by a technique using a film depositing processes and incorporating a standard printed circuit. Sensor electrodes and electronic circuits are preprinted on a flexible substrate of polyimide (PI), i.e., a flexible printed circuit board (FPCB). The sensing element, which is made of Cr/Ni/Pt with a temperature coef...