A measurement of various drive cycles (urban and extra urban) was designed. An AIM EVO 5 data logger was used as a measurement hub. This data logger was attached to the motorcycle along with sensors which would measure all of the required parameters simultaneously as the motorcycle was driven along its route.
- Position, heading, altitude and velocity were all measured by the data logger’s on-board GPS
- Acceleration, roll, pitch and yaw were measured by the data logger’s on-board gyroscope
- Wheel speed was measured by magnetic hall effect sensors attached to the wheels
- Suspension displacement was measured by displacement potentiometers attached alongside the suspension
- Tyre pressure was measured by wireless tyre pressure sensors mounted to the tyre valves
- Wind velocity and direction were measured by an anemometer mounted to the front of the motorcycle
The motorcycle was driven along pre-determined routes which approximately corresponded to an urban and extra urban drive cycle, with the sensors feeding data into the data logger, which was recording everything at a sampling frequency of 10 Hz. The data was then wirelessly transmitted (via Wi-Fi) to a laptop for analysis.
g system is modular and easy to use: a printhead may be simply docked to a fluid aspiration device (JetSpyder™), which draws fluid samples from well plates containing fluid samples. The JetSpyder™ is removed allowing the printhead to then deposit well-controlled arrays of fluid droplets, with a precision on the order of 10 microns, onto slides or other media for analysis. In the operation of a modular fluidic system, however, it is complex and time-consuming to ensure correct mounting for operation, e.g. making sure seals are tight and fluid paths are well-aligned.
Figure 1 – shock absorber displacement sensor and wheel speed sensor mounted to the motorcycle
Figure 2 – Aim Evo 5 data logger in a box mounted to the rear of the motorcycle