3D Printed Interdigitated Capacitor Based Tilt Sensor

Abstract

This paper presents a tilt sensor comprising of 3D printed capacitive sensors located at the four ends of a '+' shaped channel to provide the orientation of objects by using the capacitive fluid level measurement concept. The interdigitated capacitive sensors were developed by 3D printing and the channel was filled with ecoflex and silicone oil to obtain two variants of tilt sensor. The results show a change in the capacitance of ~11.5% and ~9.53% for ecoflex and silicone oil-based sensors respectively. A drift of ~2.6% is observed for ecoflex and ~0.16% for silicone oil. Considering the lower viscosity and the lower drift, the silicone oil-based tilt sensors were further investigated and two tilt sensors with varying silicone volumes (1ml and 1.5ml) were fabricated and compared for tilt angles ranging from 0 o to 30 o. The result from all four interdigitated capacitive sensors in the tilt sensing structure show similar rate of change in capacitance (~0.67% per degree increase in the tilt angle) with a standard deviation of ~±0.1%. However, the sensor with higher volume of silicone oil (1.5ml) saturated at a tilt angle of ~20 o which is ~10 o smaller than the response of the sensor fabricated with 1ml of silicone oil (saturated at 30 o). We also demonstrate the possibility of extending the sensor range by optimizing the volume of fluid and the channel's fluid capacity. With integration of fabricated tilt sensor with a robots' body, white cane or smart objects etc., it will be possible to obtain the information about orientation.

Level Detection Equipment for Measuring the Influence of Different Leveling Accuracies on Linear Error

“…So, the aforesaid test values have passed the criteria, and the regression equation is expressed as Eq. (20). 11 Journal of Sensors the fitness is very high, as shown in Figure 22 and Eqs.…”

“…This study develops an equipment of the leveling accuracy real-time measurement system, and the sensing equipment is an electrolyte level sensor. When a leveling error occurs, the bubble moves to the end on higher level, the difference in electrolyte liquid contact area generates voltage difference, and current level condition can be known by analyzing this voltage difference [18][19][20]. The aforesaid equipment is drawn in a circuit, as shown in Figure 5.…”

Fused Deposition Modeling‐Based 3D‐Printed Electrical Interconnects and Circuits

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Characterization and Benchmark of a Novel Capacitive and Fluidic Inclination Sensor

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