3), that is, when bending of the sway vibrating body 1 in an arced shape relaxed (“B” in FIG. 2, the sway vibrating body 1 bends in a downstream direction in response to a fluid force F exerted on a circumference surface thereof by a water current, sways in a bending state, and generates tension within a maximum deflection angle (maximum variation) from the direction of water current.
In order to achieve the present invention, a preferable mode is one that wherein includes a sway vibrating body, made up of a bowstring member or an arched shape of a tension generating member, which bends in response to a fluid force exerted on a circumference surface thereof by a water current, sways in a bending state, and generates tension in response to a deflection angle from a direction of the water current, and a pair of tension power generating units, each made up of a piezoelectric element and a tension transmitting plate, for converting the tension transmitted as compressive stress from the sway vibrating body to the piezoelectric element through the tension transmitting plate into the electric power. On the other hand, when the deflection angle of the sway vibrating body (bowstring member) 1 reaches its maximum “α” (FIG.
Dolores Musculares Y Fiebre
The minimum tension generated in the sway vibrating body 1 acts as minimum pressure on the piezoelectric elements 5, 5 through the tension transmitting plate 6, 6, whereby output voltage from each tension power generating unit 2, 2 also reaches its minimum ((c) in FIG. With respect to the Karman vortices, its occurrence frequency is uniquely determined by fluid properties, such as a density and viscosity of fluid, a current velocity, and a diameter of the column body. FIG. 4 is an illustration for explaining a related art, including a group of wave form charts showing vibration displacements and tension variations of a column body making up a Karman vortex power generating device, and an output voltage from piezoelectric elements body making up the Karman vortex power generating device. Flow separation tram a smooth surface of the column body is an origin of Kaman vortices, and therefore fluid separation becomes responsible for originating a turbulent flow, instead of the Karman vortices, as loss of smoothing on the surface of the column body is advanced.
Tecnicas De Relajacion
The fluttering vibration power generating device described in non-patent reference 1 includes a multi-articulated flat plate for vibrating in a fluttering mode in a mean wind/water flow, and a piezoelectric element for generating electric power from the fluttering vibration generated by the multi-articulated flat plate. The Kalman vortex power generating device described in patent references 2 and 3, includes a column body (including a cylindrical body) and a pair of piezoelectric elements, and when a water current collides with the column body, is configured to convert electromagnetically or piezoelectrically a vibration caused by the Kalman vortex street into an electric output. The fluctuating tension “σ” is transmitted from the sway vibrating body 1 to the piezoelectric elements 5, 5 through the tension transmitting plates 6, 6, and converted into an electric output ((c) in FIG. As mentioned above, with the present embodiment, the fluctuating tension (tension variation) “σ” due to a periodic vibration angular variation of the sway vibrating body 1 is applied to the piezoelectric elements 5, 5 as the fluctuating pressure P to be converted into an output voltage.
Dolor Muscular Antebrazo
1, includes an AC/DC (Direct Current/Alternating Current) separator 9 for passing only an AC component out of electric power output from the tension power generating units 2, 2, and an accumulator 10 for accumulating AC power output from the AC/DC separator 9. The electric power accumulated in accumulator 10 is supplied to an observation equipment (not shown) and alike. Moreover, with the fluttering vibration power generating device (wind/water power generating device) described in non-patent reference 1, there is a problem that the above-mentioned multi-articulated flat plate for generating fluttering vibration is complicated in mechanical structure, and it is difficult to keep performance withstanding over long periods of time against a variety of external variations, such as variations of current in direction and in flow rate.
In such a case, the vibration period of the sway vibrating body 1 varies with velocity and direction of tidal current, whereas the fluctuating tension generated in the sway vibrating body 1 does not vary much in amplitude. If the tape shape of tension generating member is formed to have further an arched cross-sectional shape, since still greater amplitude of vibration and still greater tension variation can be achieved, and therefore electric power can be generated from water current power with a still higher degree of efficiency. Even from this point, according to the sway vibration power generating device of the first embodiment, more stable electric power can be generated from water current power. 1 is a partially perspective and cross-sectional view with a schematic block diagram for schematically showing electrical and mechanical configurations of a water current power generating device according to a first exemplary embodiment of the present invention.
The present invention relates to a water current power generating device capable of generating electric power from water current power, and more particularly to the water current power generating device for generating electric power, by utilizing a vibration phenomenon in which a bowstring member or a bow-shaped member bends in a downstream direction, generates tension and sways in a bending and tensioned state, when put in a water current. 3, a periodic tension “σ” of the sway vibrating body 1 generated corresponding to a period of the sway vibration acts on the piezoelectric element 5 as a fluctuating pressure P (FIG. In each tension power generating unit 2, a through hole 7 a is formed in a center portion of the piezoelectric element 5, and a through holes 7 b is formed in a center portion of the tension transmitting plate 6, so that the through holes 7 a, 7 b have a common axial center.
Dolor Muscular En El Pecho
Moreover, a stainless steel and a titanium material which each are excellent in corrosion resistance, and a steel material such as a piano wire which suffers little change in elongation may be used as preferable metals for the bowstring member. Also, the piezoelectric element 5, a power outgoing line and a like making up each tension power generating unit 2 are waterproofed by resin coating, insert molding or a like (not shown) in order to prevent an electric short circuit.
- Ayudar a programar la radioterapia
- Ultra cavitación
- ¿Cuándo se aconseja aplicar los factore
- Espasmo ou inflamación dos músculos da cabeza e o pescozo
- Tumores benignos y malignos
- The apparatus of claim 7, further comprising a pin joint
- FIG. 5C depicts a perspective view of another embodiment of a kinetic energy conversion system
- Pela el jengibre, pícalo en pequeños trozos y procede a rallarlos
Two tension power generating units 2, 2 (piezoelectric element 5, 5) are placed on opposite sides of a plurality of supporting columns 3, 3,. Dolor lumbar pdf . Also, in the above exemplary embodiment, the case is described where fluctuating pressure (compressive stress) is applied to a piezoelectric element. Third Exemplary embodiment Next, a third exemplary embodiment of the present invention is described. Here, a period of self-sustained sway vibration is determined by a type of fluid, structural parameters of the sway vibrating body 1 (in detail, a cross section structure, length, density, and flexibility) and tension generated in the sway vibrating body 1. The tension occurs in the sway vibrating body 1 in response to fluid forces F exerted on a circumference surface thereof by a fluid current/flow (a water current/flow in the present embodiment). Next, operations of the present embodiment are described.