Based on an analysis of the bending of the laminated piezo/carbon-fibre beam by the action of the waves, the electrical energy generated thereby can be estimated. 3, the assembly 20 generates electric energy by alternately stretching and compressing the piezoelectric elements 86, 88, 90 and 93 as the laminated elastic beam made of the elastic planar member 74 and the piezoelectric elements is bent by the action of successive waves 26 and 28. As seen in FIG. The assembly includes a plurality of piezoelectric elements extending along the elastic planar member. The elastic planar member so flattened causes compressive stress in the piezoelectric elements 226.5, 86.5, 228.5, 464, 466 and 468. Thus, when the assembly 20.5 is assembled and the elastic planar members 74.5 are clamped to the buoyant planar members 148.5 and 156.5, the elastic planar members are straightened again, further increasing in the compression of the piezo material to insure against the possibility of tensile rupture.
- Bandas elásticas
- Wave height upper limit: 4 m
- Tos fuerte o persistente
- FIG 44 illustrates some aspects of assembled details of a bilateral reciprocating embodiment
- Dolor a la tensión tisular
- Sensibilidad a la palpación sobre las articulaciones facetarias o los músculos paraespinales,
The assembly 20.4 thus includes the addition of relatively thin but stiff slats at regular intervals along the length of the elastic planar members 74.4, 406, 412, and 416. The width Ws of the slats in the direction of the wave motion is shaped to be at least four or five times less than the wavelength LWA.4 of the smallest wave from which the assembly 20.4 is being designed to extract energy. FIGS. 17 to 18 show part of an assembly 20.4 for generating energy from waves according to a fifth aspect. Assembly 20.4 is substantially the same as assembly 20 of FIGS. FIG. 12 is a schematic view of one of the piezoelectric elements of the assembly of FIG. As before, it should be noted there should be two or more piezoelectric elements in the direction along the waves in order that discontinuities of bending stiffness associated with the gap between the piezoelectric elements are minimised.
As before, the assembly 20.3 includes two or more piezoelectric elements (in the direction along the waves) in order that discontinuities of bending stiffness associated with the gap between the piezoelectric elements are minimised. However, the plurality of elastic planar members 74, 75, 77 and 79 is not strictly required, as the assembly 20 may include only a single, wide elastic planar member in other embodiments, for example. Each of the elastic planar members includes one or more said piezoelectric elements coupled thereto. The method includes providing an in-sea generator in electrical connection with the device. The material can manifest a high coupling coefficient and may therefore produce a high electrical output for a given input of mechanical (elastic) energy, such as about 46%, for example. Dolor de espalda en la parte alta . The piezoelectric elements may be purchased under the trade name “Soft PZT PIC181” at PI Ceramic GmbH, having an address of Lindenstrasse 07589, Lederhose, Germany.
Dolor Neuropático Crónico
10B, the assembly 20.1 includes a plurality of longitudinally spaced-apart lower rows of laterally spaced-apart piezoelectric elements coupled to and extending along the bottoms 76.1 of the elastic planar members 74.1 at locations between adjacent buoyant planar members 148 and 156. This includes a first lower row 269 of laterally spaced-apart piezoelectric elements 270 a and 270 b, a second lower row 271 of laterally spaced-apart piezoelectric elements 90.1 a and 90.1 b, a third lower row 273 of laterally spaced-apart piezoelectric elements 88.1 a and 88.1 b, and a fourth lower row 275 of laterally spaced-apart piezoelectric elements 274 a.
The elastic planar members are generally rectangular sheets in shape in this example. The fourth side of the buoyant planar member is between the third side and the fifth side of the buoyant planar member. A fifth said elastic planar member couples to and extends between the first side of the fifth said buoyant planar member and the fourth side of a sixth said buoyant planar member. The structure includes piezoelectric material members, preferably in the form of one or a laminate of sheets of such material. 1, the assembly 20 includes at least one and in this example a pair of connecting members, in this case tethers 54 and 56 that releasably tether the wave-interacting portion 48 of the assembly 20 to buoy 38. As seen in FIG. The device comprises at least one flexible, floatable tube which is closed at its two ends. 2, the buoyant planar member is rectangular in top and bottom profile in this example when viewed from above and below, is shaped to float along the surface 34 of the ocean waves 26, 28, 30 and 32, and may be at least partially submerged.
1, there is shown a floating piezoelectric assembly 20 for generating energy from water waves 22, 24, 26, 28, 30 and 32 seen in FIG. The buoyant planar member extends from side 60 to side 62 of the wave-interacting portion 48 of the assembly 20 seen in FIG. The elastic planar members 74 couple to and are between the buoyant planar member 68 and the weighted planar member in this example. 4 by elastic planar member 74 coupling to buoyant planar member 68. The elastic planar members in this example are made of carbon fibre composite, in this case a carbon fibre reinforced plastic which provides high strength and corrosion resistance. The assembly may be referred to a series of interconnected groups of six buoyant planar members 177, 280, 286, 294, 288 and 282 surrounding a space 333 where another identical buoyant planar member could have been located but has not been installed.
3 by the gap 92 between elements 88 and 90. This effect is minimized by staggering the rows 81 and 89 of elements 86 and 93 of the first layer 71 of piezoelectric elements above the elastic planar members 74 relative to the rows 95 and 97 of elements 88 and 90 of the second layer 73 of piezoelectric elements below the elastic planar member. Some buoyant planar members further include a third pair of elastic planar members 216 and 217 coupled to the ends 162 and 164 thereof and which are between the first side 158 and second side 160 of the buoyant planar member. The plurality of longitudinally spaced-apart rows of laterally spaced-apart elastic planar members includes a fifth row 224 of longitudinally spaced-apart elastic planar members 233, 235, 237, 239, 241 and 243. Postura dormir dolor lumbar . Elastic planar members 233, 235 and 237 couple to and extend from buoyant planar member 152 to other buoyant planar members (not shown) of the assembly 20 and elastic planar members 239, 241 and 243 couple to and extend from buoyant planar member 154 to other buoyant planar members (not shown) of the assembly in a like pattern as described above.
Tipos De Dolor De Espalda
19 and 20 with decimal extension “0.6” replacing decimal extension “0.5” and being added for numbers not previously having decimal extensions, and with the following exceptions. 1 to 8, with like parts having like numbers and functions as the assembly 20 shown in FIGS. 23 with decimal extension “0.8” replacing decimal extension “0.7” and being added for numbers previously not including decimal extensions.