摘要:
A microsensor for detecting corrosive media acting on a bulk metallic material when mounted in situ adjacent a location in the bulk metallic material. The microsensor includes a plurality of corrosion sensors (4A, 4B, 4C) exposed to the corrosive media, each having corrosive tracks formed from a patterned conductive thin film. The different sensors have different characteristics, such as track width, track thickness, track composition, surface type, sensor type, etc. so as to provide the sensors with different sensitivities, corrosion indications and lifetime characteristics. Such microsensor arrangements provide improved corrosion detection at high degrees of miniaturisation.
摘要:
A microsensor for detecting corrosive media acting on a bulk metallic material when mounted in situ adjacent a location in the bulk metallic material. The microsensor includes a plurality of corrosive tracks (16; 132; 216B) exposed to the corrosive media, each said corrosive track being formed as a patterned conductive thin film track. The tracks follow serpentine paths which include a plurality of bends, at least two of which are of opposite curvature, to provide a high degree of miniaturisation coupled with accurate and reliable corrosion sensing characteristics. The corrosive tracks may be formed from an alloy material, such as an aluminium alloy, to mimic the corrosive characteristics of a bulk metallic alloy and to provide improved corrosion detection for components made from such materials at high degrees of miniaturisation.
摘要:
A vibrator 10, which is formed in a silicon wafer 1 by means of MEMS technique, has eight beam portions (beams) 12 supported at a central portion 11 and extending in the radial direction while mutually keeping the same angle and has a ring portion 13 connected to the eight beam portions 12. Outside the ring portion 13, eight electrodes 21a to 21h for electrostatic actuation, capacitance detection, or the like are spaced uniformly with a gap 22 created between the ring portion 13 and the electrodes 21a to 21h. Inside the ring portion 13, sixteen electrodes 23 for frequency adjustment are spaced uniformly with a gap 24 created between the ring portion 13 and the electrodes 23.
摘要:
A vibrating structure gyroscope having a silicon substantially planar ring vibrating structure (1) capacitive means for imparting drive motion to and sensing motion of the vibrating structure (1), and a screen layer (15) surrounding the capacitive means is made by depositing photoresist material (9) on a glass or silicon substrate (7), hardening, patterning and developing the photoresist (9) to expose areas of the substrate (7), etching the exposed areas to form cavities (10) therein, stripping any remaining photoresist material (9) attaching a silicon layer (8) to the cavitated substrate (7) depositing a layer of aluminium on the silicon layer (8), depositing photoresist material on the aluminium layer, hardening, patterning and developing the photoresist layer to expose areas of the aluminium layer, etching the exposed areas of the aluminium layer to leave regions of aluminium on the silicon layer providing bond pads (11, 12, 13 and 14), stripping the remaining photoresist from the aluminium layer, depositing another layer of photoresist material on the silicon layer (8) over the remaining deposited aluminium layer regions, hardening, patterning and developing the layer of photoresist material to expose areas of the silicon layer (8) and deep reactive ion etching the exposed areas of the silicon layer (8) to form therefrom the substantially planar ring vibrating structure (1) mounted by a hub (4) above the cavities (10).
摘要:
A vibrator 10, which is formed in a silicon wafer 1 by means of MEMS technique, has eight beam portions (beams) 12 supported at a central portion 11 and extending in the radial direction while mutually keeping the same angle and has a ring portion 13 connected to the eight beam portions 12. Outside the ring portion 13, eight electrodes 21a to 21h for electrostatic actuation, capacitance detection, or the like are spaced uniformly with a gap 22 created between the ring portion 13 and the electrodes 21a to 21h. Inside the ring portion 13, sixteen electrodes 23 for frequency adjustment are spaced uniformly with a gap 24 created between the ring portion 13 and the electrodes 23.
摘要:
A separator is disclosed for separating particles of at least first and second mass/size ranges from an ambient fluid (e.g. gaseous) medium in which they are present, particles of the first range being of generally larger size/mass than particles of the second range. The separator is especially designed for use in an air monitoring device which is designed for rapid detection of micro-organisms such as bacteria, viruses, pathogens and the like, and is designed to be portable so that it can be readily and rapidly deployed in both civilian and military environments and can be used indoors and outdoors; it can also be designed for personal use.