JP2015220774A - Vibration power generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration power generator which can improve generation efficiency.SOLUTION: The vibration power generator includes: a substrate 4 for receiving vibration from a vibration source 2; a first swing beam 6 having an intermediate part in the longer direction supported through a fulcrum 5 provided on the substrate, to swing around the fulcrum on receiving vibration; a pair of weight bodies 7, 8 fixed to both ends of the first swing beam; a plurality of first amplitude restriction devices 9-12, disposed in the movement direction of the pair of weight bodies, for restricting the amplitude of the first swing beam by a collision with the pair of weight bodies; and a pair of first vibration power converters 13, 14, disposed on both sides of the longer direction across the fulcrum of the first swing beam, for generating power by the enlargement or the compression of magnetic strain members 17, 21 by impact force caused by the collision between the weight bodies, which receives vibration, and the first amplitude restriction devices.

Description

  The present invention relates to a vibration power generation apparatus that generates power by vibration capable of supplying power to sensors installed on, for example, an expressway or a bridge.

As a power generation technique using vibration, a method using a piezoelectric element is well known. Many of the power generation methods using piezoelectric elements are to generate power by deforming the piezoelectric elements by applying external force to the piezoelectric elements in some way.
As a vibration power generation apparatus using a piezoelectric element, for example, there is one described in Patent Document 1. Patent Document 1 describes a sound power generation device that generates electric power using a piezoelectric element using air pressure fluctuation caused by sound, and a vibration force power generation apparatus that generates electric power using a piezoelectric element using pressure fluctuation caused by vibration.
A power generation method using a magnetostrictive element instead of a piezoelectric element has also been proposed. As a power generation method using a magnetostrictive element, for example, the one described in Patent Document 2 is known.

The vibration power generation apparatus using the magnetostrictive element of Patent Document 2 includes a power generation element 100 shown in FIGS. 7 (a) and 7 (b). 7A is a top view showing the power generation element 100, and FIG. 7B is a side view showing the power generation element 100. FIG.
The power generation element 100 includes coupling yokes 100a and 100b, magnetostrictive rods 110a and 110b supported in parallel to the coupling yokes 100a and 100b, coils 120a and 120b wound around the magnetostrictive rods 110a and 110b, and the coupling yoke 100a. And the back yoke 150 connected to the magnet 100b through permanent magnets 140a and 140b.

  As shown in FIG. 8, the power generating element 100 has a connecting yoke 100a fixed to a fixed portion to form a cantilever structure, and a bending stress P is applied to the connecting yoke 100b in a direction perpendicular to the axial direction of the power generating element 100. As a result, the magnetostrictive rods 110a and 110b are bent and deformed. As a result, the magnetic flux passing through the coils 120a and 120b changes due to the inverse magnetostrictive effect generated in the magnetostrictive rods 110a and 110b, thereby generating an induced voltage (or induced power) in the coils 120a and 120b. As a result, power can be generated by applying vibration to the power generation element 100.

JP 2006-166694 A Japanese Patent No. 4905820

  In the vibration power generation apparatus using the piezoelectric element described in Patent Document 1, the piezoelectric material constituting the piezoelectric element is a brittle material, and is a material that is weak against bending and impact. Therefore, an excessive load cannot be applied, and there is a problem that it is difficult to apply a large bending or impact in order to increase the power generation amount. In addition, the piezoelectric element has a high impedance at a low frequency, and when a load having a lower impedance than that of the piezoelectric element is connected, the voltage generated in the load is small, so the power obtained by power generation is small and the power generation efficiency is low. There is also a problem.

  On the other hand, the magnetostrictive material constituting the magnetostrictive rods 110a and 110b described in Patent Document 2 is a ductile material, and is more resistant to bending and impact than piezoelectric materials. Therefore, power generation is increased by applying large bending and impact. Is possible. In addition, since the impedance of the power generation element is lower than that of the piezoelectric material, there is little reduction in power generation efficiency due to connection of a load with low impedance, and the above-described problems of the piezoelectric material can be solved.

However, the vibration power generation apparatus described in Patent Document 2 requires a large excitation force from the vibration source to generate power by generating spring deformation of the magnetostrictive rod while vibrating, so that it absorbs vibration energy and generates power. There is an unresolved issue of reduced efficiency.
Then, this invention is made | formed paying attention to the unsolved subject of the said prior art example, and it aims at providing the vibration electric power generating apparatus which can raise electric power generation efficiency.

  In order to achieve the above object, a vibration power generation apparatus according to an aspect of the present invention includes a support body that receives vibration from a vibration source, and a longitudinal intermediate portion that is supported via a fulcrum provided on the support body. A first oscillating beam that oscillates around the fulcrum by receiving, a pair of weights fixed to both ends of the first oscillating beam, and a moving direction of at least one of the pair of weights And a first amplitude limiting device that limits the amplitude of the first oscillating beam by collision with the weight body, and at least the first of both sides in the longitudinal direction across the fulcrum of the first oscillating beam. A first vibration power conversion unit that is provided on the side where the one amplitude limiting device is disposed, and generates power when the magnetostrictive member expands or compresses by an impact force caused by a collision between the weight body that receives vibration and the first amplitude limiting device. And.

  According to the vibration power generator of the present invention, when vibration is transmitted from the vibration source, the first swing beam swings about the pivot point as a rotation center, and a pair of weights fixed to both ends of the first swing beam. When the weight collides with the first amplitude limiting device provided in the moving direction of at least one of the first and second weights, at least the first amplitude limiting device is disposed on both sides in the longitudinal direction of the first oscillating beam. Since the first oscillating power conversion unit provided on the side performs oscillating power generation, the power generation efficiency can be improved.

It is a figure which shows the vibration electric power generating apparatus of 1st Embodiment which concerns on this invention. It is a figure which shows the state which the magnetostrictive member which comprises the vibration electric power generating apparatus of 1st Embodiment compressively deforms. It is a figure which shows the state which the magnetostrictive member which comprises the vibration electric power generating apparatus of 1st Embodiment expands and deforms. It is a figure which shows the amplitude limiting apparatus in the vibration electric power generating apparatus of 2nd Embodiment which concerns on this invention. It is a figure which shows the vibration electric power generating apparatus of 3rd Embodiment which concerns on this invention. It is a figure showing an example of composition of a power circuit in a vibration power generator of a 1st embodiment concerning the present invention. It is a figure which shows the structure of the conventional electric power generation element. It is a figure which shows the structural example of the electric power generating apparatus by the electric power generating element shown in FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, modes for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the drawings.

[Embodiment 1]
FIG. 1 is a front view showing a vibration power generator according to a first embodiment of the present invention.
The vibration power generator 1 according to the first embodiment shown in FIG. 1 is provided on a device case 3 fixed to the upper part of the vibration source 2, a support column 4 rising from the bottom 3 a of the device case 3, and an upper part of the support column 4. An intermediate portion in the longitudinal direction is rotatably supported by the pin 5, and a swinging rod-like swinging beam 6 that swings around the pin 5 by receiving vertical vibration and fixed to both longitudinal ends of the swinging beam 6. Corresponding to the moving direction of the weight 8 and the pair of weights 7 and 8, the amplitude limiting devices 9 and 10 disposed on the upper wall 3b and the bottom 3a of the device case 2 corresponding to the moving direction of the weight 7 Amplitude limiting devices 11 and 12 disposed on the upper wall 3b and bottom 3a of the device case 2 to be configured, a pair of vibration power converters 13 and 14 provided on both sides in the longitudinal direction of the oscillating beam 6, a power supply circuit 201, It has.

The oscillating beam 6 is a member made of a magnetic material, and a pair of cutout portions 6a and 6b is formed by extending one side in the width direction in the longitudinal direction on both sides of the oscillating beam 6 in the longitudinal direction. In addition, magnetic rod-like portions 6c and 6d extending in the longitudinal direction along the notches 6a and 6b are formed.
Magnetostrictive rods 17 having permanent magnets 15 and 16 for supplying magnetic biases fixed to both ends extend parallel to the magnetic rod-like portion 6c and are fixed to both edges 6e and 6f in the longitudinal direction of one notch 6a. In addition, a magnetic coil 18 is wound around the magnetostrictive rod 17. The magnetic coil 18 is connected to the power supply circuit 201.

Further, at both longitudinal ends 6g and 6h of the other notch 6b, magnetostrictive rods 21 having permanent magnets 19 and 20 for supplying magnetic biases fixed to both ends extend in parallel to the magnetic rod-like portion 6d. The magnetostrictive rod 21 is wound with a magnetic coil 22. The magnetic coil 22 is connected to the power supply circuit 201.
Here, the magnetostrictive rods 17 and 21 are members made of iron gallium alloy or iron cobalt alloy. The permanent magnets 15, 16, 19, and 20 generate a bias magnetic field. The permanent magnets 15 and 16 are, for example, magnetized with S pole on the left end side and N pole on the right end side, and the permanent magnets 19 and 20 are magnetized with N pole on the left end side and S pole on the right end side, for example.

  As a result, one of the pair of vibration power converters 13, 14 has a magnetic rod-shaped portion 6 c extending in the longitudinal direction, a magnetostrictive rod 17, and the magnetic rod-shaped portion 6 c and the magnetostrictive rod 17 are magnetized. The oscillating beam 6 (both edges 6e and 6f in the longitudinal direction) and the magnetic coil 18 are connected to each other, and the magnetic flux emitted from the north pole of the permanent magnet 15 passes through the magnetostrictive rod 17 to pass through the permanent magnet 16 and magnetism. A magnetic path that reaches the S pole of the permanent magnet 15 through the rod-like portion 6c is formed.

  The other vibration power converter 14 includes a magnetic rod-shaped portion 6d extending in the longitudinal direction, a magnetostrictive rod 21, and an oscillating beam 6 (longitudinal direction) that magnetically connects the magnetic rod-shaped portion 6d and the magnetostrictive rod 21. Both edges 6g, 6h) and the magnetic coil 22, and the magnetic flux emitted from the N pole of the permanent magnet 19 passes through the magnetostrictive rod 21, passes through the permanent magnet 20, the magnetic rod-shaped portion 6d, and S of the permanent magnet 19 A magnetic path reaching the pole is formed.

The peristaltic beam 6 is not limited to a configuration made entirely of a magnetic material, and a loop of a magnetic circuit is formed corresponding to each of the magnetostrictive rods 17 and 21 on both sides of the oscillating beam 44 in the longitudinal direction. It is sufficient if the structure is such that
The amplitude limiting devices 9 and 10 include a displacement member 23 that abuts on the weight 7 fixed to one end in the longitudinal direction of the oscillating beam 6, and a coil that holds the displacement member 23 and is fixed to the upper wall 3b and the bottom 3a. It consists of a spring 24. The amplitude limiters 11 and 12 are also fixed to the upper wall 3b and the bottom 3a holding the displacement member 23 that contacts the weight 8 fixed to the other end in the longitudinal direction of the oscillating beam 6, and holding the displacement member 23. The coil spring 24 is provided. The coil springs 24 of the amplitude limiters 9 to 12 swing by the swinging beam 6 swinging around the pin 5 and elastically expanding and contracting when the weights 7 and 8 collide with the displacement member 23. While limiting the amplitude of the beam 6, a force in the opposite direction to the colliding direction is applied to the weight bodies 7 and 8 by its own spring restoring force.

Here, the support according to the present invention corresponds to the support column 4, the fulcrum according to the present invention corresponds to the pin 5, the first rocking beam according to the present invention corresponds to the rocking beam 6, and according to the present invention. The first amplitude limiting device corresponds to the amplitude limiting devices 9 to 12, the first vibration power conversion unit according to the present invention corresponds to the vibration power conversion units 13 and 14, and the spring member according to the present invention corresponds to the coil spring 24. doing.
A configuration of the power supply circuit 201 used in the vibration power generator 1 of the first embodiment will be described. FIG. 6 is a diagram illustrating a configuration example of the power supply circuit according to the first embodiment of the present invention. 6, 202a and 202b are rectifying means for rectifying the AC voltage generated in the magnetic coils 18 and 22 (coil windings), 203a and 203b are smoothing means for smoothing the rectified signals of the rectifying means 202a and 202b, and 205 is Power storage means 206 composed of a secondary battery or a capacitor, and 206 is output means for outputting the power stored in the power storage means 205 to the output terminal 207. Reference numeral 204 denotes control means for controlling the DC voltage smoothed by the smoothing means 203a and 203b to be stored in the power storage means 205 and supplying the power stored in the power storage means 205 to the output circuit 206.

Next, operations and effects of the first embodiment described above will be described with reference to FIGS. 1 and 2.
For example, on an expressway and a bridge, since aging progresses, it is necessary to arrange a structural health monitoring sensor such as an acceleration sensor, a vibration sensor, or a corrosion sensor to grasp a deterioration tendency.
These structural health monitoring sensors require a power source, but the storage battery has a limited life, and therefore needs to be replaced periodically, and its management becomes complicated. For this reason, the vibration power generator 1 is applied as a power source of the structural health monitoring sensor.

In the present embodiment, a highway or a bridge is used as the vibration source 2, and the vibration power generator 1 is installed on the vibration source 2.
In a state where no vibration is transmitted from the vibration source 2 to the device case 3, as shown in FIG. 1, the swing beam 6 is held in a horizontal state without swinging around the pin 5 as a rotation center. In the horizontal state of the beam 6, the magnetostrictive rods 17 and 21 of the pair of vibration power converters 13 and 14 are not stretched and deformed and the lines of magnetic force do not change, so that the voltage (power) from the magnetic coils 18 and 22 (coil winding) is changed. There is no output.

In this state, when the vehicle passes through the highway or the bridge (vibration source 2), the vibration is transmitted to the vibration power generator 1.
When the vibration energy in the vertical direction of the vibration source 2 is transmitted to the device case 3 of the vibration power generator 1, the swing beam 6 to which the vibration energy is transmitted through the support column 4 swings around the pin 5 as the rotation center. Then, the pair of weights 7 and 8 fixed to both ends of the oscillating beam 6 are in the primary mode resonance state.

As shown in FIG. 2, when the weight 7 collides with the amplitude limiting device 10 on the bottom 3 a by the swing of the swing beam 6, a reaction force is applied to the swing beam 6 from the displacement member 23 of the amplitude limiter 10. By inputting, the magnetostrictive rod 17 of the vibration power converter 13 is deformed in the compression direction.
The coil spring 24 of the amplitude limiter 10 that collides with the weight body 7 elastically expands and contracts to limit the amplitude of the oscillating beam 6 and exerts a pushing force in a direction opposite to the direction of collision by its own spring restoring force. Applying to the weight body 7, a swinging propulsion force (rotating operation with the pin 5 as a rotation center) is applied to the swinging beam 6.

As shown in FIG. 3, when the weight 7 collides with the amplitude limiting device 9 on the upper wall 3 b due to the swinging of the swinging beam 6, the reaction force is applied to the swinging beam 6 from the displacement member 23 of the amplitude limiting device 9. Is input, the magnetostrictive rod 17 of the vibration power converter 13 is deformed in the extending direction.
The coil spring 24 of the amplitude limiter 9 that collides with the weight body 7 elastically expands and contracts to limit the amplitude of the oscillating beam 6 and exerts a pressing force in the opposite direction to the direction of collision due to its own spring restoring force. A swinging propulsive force is applied to the swinging beam 6 by being applied to the weight body 7.

Although not shown, when the weight 8 collides with the amplitude limiting device 12 on the bottom 3a due to the swinging of the swinging beam 6, a reaction force is input to the swinging beam 6 from the displacement member 23 of the amplitude limiting device 12. Thus, the magnetostrictive rod 21 of the vibration power converter 14 is deformed in the compression direction.
In addition, the coil spring 24 of the amplitude limiter 12 that collides with the weight 8 restricts the amplitude of the oscillating beam 6 by elastic expansion and contraction, and is pushed up in the direction opposite to the direction of collision due to its own spring restoring force. A force is applied to the weight body 8 and a swinging propulsive force is applied to the swinging beam 6.

Although not shown, when the weight 8 collides with the amplitude limiting device 11 on the upper wall 3b due to the swinging of the swinging beam 6, a reaction force is input to the swinging beam 6 from the displacement member 23 of the amplitude limiting device 11. Thus, the magnetostrictive rod 21 of the vibration power converter 14 is deformed in the extending direction.
In addition, the coil spring 24 of the amplitude limiter 11 with which the weight 8 collides limits the amplitude of the swing beam 6 by elastic expansion and contraction, and pushes down in the direction opposite to the direction in which it collides with its own spring restoring force. A force is applied to the weight body 8 and a swinging propulsive force is applied to the swinging beam 6.

  In this way, the pair of vibration power converters 13 and 14 is repeatedly stretched and compressed on the magnetostrictive rods 17 and 21, and the lines of magnetic force change alternately due to the inverse magnetostrictive effect. This change in the magnetic force lines can generate vibration power by generating an induced voltage (induced power) in the magnetic coils 18 and 22 (coil windings) of the pair of vibration power converters 13 and 14 according to the law of electromagnetic induction.

  Therefore, in the vibration power generation apparatus 1 of the present embodiment, when vibration is transmitted from a highway or a bridge (vibration source 2), the swing beam 6 swings about the pin 5 as a rotation center, and both ends of the swing beam 6 are Since the pair of vibration power converters 13 and 14 generate vibration power by colliding with any of the amplitude limiters 9 to 12 provided in the moving direction of the weights 7 and 8 fixed to the vibration power generator 1, the vibration power generator 1 Can be supplied to the environmental health monitoring sensor as an operating power source, and these environmental health monitoring sensors can be operated.

In addition, the vibration power generation apparatus 1 of the present embodiment can improve the power generation efficiency because the pair of vibration power converters 13 and 14 simultaneously perform vibration power generation by swinging the swing beam 6.
Further, since the vibration power generation of the pair of vibration power converters 13 and 14 is performed only by the rocking beam 6 swinging around the pin 5 as a rotation center, a resonance phenomenon is caused with respect to the vibration in the low frequency region. Power generation.

In addition, the magnetostrictive rods 17 and 21 constituting the pair of vibration power conversion units 13 and 14 are ductile materials and are more resistant to bending and impact than the piezoelectric material. Therefore, the amount of power generation is increased by applying large bending and impact. It is possible.
Furthermore, the coil spring 24 constituting the amplitude limiting devices 9 to 12 in the present embodiment swings by applying a pressing force in the opposite direction to the weights 7 and 8 with respect to the direction of collision by its own spring restoring force. A swinging propulsive force is applied to the beam 6 and the swinging beam 6 repeats the swinging operation for a long time, so that the weights 7 and 8 collide with the amplitude limiting devices 9 to 12 and a pair of vibration power conversion units. Since 13 and 14 perform vibration power generation, the power generation efficiency can be further increased.

  In FIG. 1, as the amplitude limiting device, the amplitude limiting devices 9 and 10 disposed on the upper wall 3 b and the bottom portion 3 a of the device case 2 corresponding to the moving direction of the weight body 7, and the moving direction of the weight body 8. Although the structure provided with both the amplitude limiting devices 11 and 12 arrange | positioned at the upper wall 3b and the bottom part 3a of the apparatus case 2 is shown, it is not limited to such a structure. That is, a configuration in which the amplitude limiting device is arranged only at a position corresponding to the moving direction of one of the weights, for example, the upper wall 3b and the bottom 3a of the device case 2 corresponding to the moving direction of the weight 7 is provided. It can also be set as the structure provided only with the arrange | positioned amplitude limiting devices 9 and 10. FIG.

1 shows a configuration in which a pair of vibration power conversion units 13 and 14 are provided on both sides of the oscillation beam 6 in the longitudinal direction as the vibration power conversion unit. However, the configuration is not limited to such a configuration. Absent. That is, a configuration in which the vibration power conversion unit is provided only on one side of both sides of the oscillating beam 6 in the longitudinal direction, for example, only the vibration power conversion unit 13 may be provided.
In the configuration in which the amplitude limiting device is disposed only at a position corresponding to the moving direction of one of the pair of weights as described above, the vibration power conversion unit has both sides of the rocking beam 6 in the longitudinal direction. Of these, it is provided on the side where the amplitude limiting device is arranged.

Moreover, in FIG. 1, although the structure which has arrange | positioned the permanent magnets 15 and 16 for magnetic bias supply to the both ends of the magnetostriction rod 17 in the vibration power converter 13 was shown, for example, it is not limited to such a structure, A configuration may be adopted in which a permanent magnet for supplying a magnetic bias is arranged only at one end of the magnetostrictive rod 17. This also applies to the vibration power converter 14.
1 shows a configuration in which the magnetic coil 18 is wound around the magnetostrictive rod 17 in the vibration power conversion unit 13, for example, but the position where the magnetic coil is wound in the vibration power conversion unit is limited to the magnetostriction rod only. However, it may be wound around another member that forms a magnetic path together with the magnetostrictive rod. That is, in the vibration power converter 13, for example, a magnetic coil may be wound around the magnetic rod-shaped portion 6c, or a magnetic coil may be wound around both the magnetostrictive rod 17 and the magnetic rod-shaped portion 6c. This also applies to the vibration power converter 14.

  Further, in the vibration power generator 1 of the present embodiment, the swing beam 6 has a symmetrical structure with the support point by the pin 5 as the center in the longitudinal direction, and the weight body fixed to both ends in the longitudinal direction of the peristaltic beam 6. The mass of the weight 7 and the mass of the weight 8 are not limited to be equal to each other, and the balance structure is such that the moments about the pins 5 on both sides in the longitudinal direction of the peristaltic beam 6 are equal to each other. Good. For example, the length of one side (for example, the left side) of the support point by the pin 5 in the longitudinal direction of the oscillating beam 6 in FIG. 1 is made longer than that of the other side (for example, the right side), and is adjusted accordingly. Thus, the mass of the weight (weight 8) on the other side (for example, the right side) is made larger than that of the weight (weight 7) on the one side (for example, the left side) so that the moments on both sides are equal. It can also be set as this structure. Here, in the following, one of the support points by the pin 5 in the longitudinal direction of the swing beam 6 having an asymmetric structure and the other side of the one side that is longer than the other side will be referred to as “long arm”. The portion on the other side is referred to as a “short arm portion”. Further, the portions on both sides of the support point by the pin 5 in the longitudinal direction of the oscillating beam 6 having a symmetrical structure are referred to as “arm portions”, respectively.

  In the configuration of the asymmetric structure, a vibration power conversion unit (for example, the vibration power conversion unit 13) may be provided only on the long arm side of the swing beam 6. Here, when the total length of the oscillating beam 6 is the same between the asymmetric structure and the symmetric structure, the long arm portion of the oscillating beam 6 having the asymmetric structure is longer than the arm portion of the oscillating beam 6 having the symmetric structure. For this reason, the mass of the weight (for example, weight 7) fixed to the end of the long arm of the oscillating beam 6 having the asymmetric structure is fixed to the end of the arm of the oscillating beam 6 having the symmetric structure. When the mass is the same as the mass of the weight body, the impact force between the weight body (for example, the weight body 7) and the amplitude limiting device (for example, the amplitude limiting devices 9, 10) is larger than that in the configuration of the symmetrical structure. As a result, in the configuration having an asymmetric structure and the vibration power conversion unit provided only on the long arm portion side of the swing beam 6, the power generation capacity per vibration power conversion unit is compared with the configuration of the symmetry structure. Get higher.

In addition, since the configuration having the asymmetric structure as described above and the vibration power conversion unit provided only on the long arm side of the swing beam 6 is a configuration in which only one vibration power conversion unit is provided, Compared to the configuration of the symmetrical structure in which two vibration power converters are provided, the configuration is simpler and lower in cost.
In addition, the above-described asymmetric structure and the configuration in which the oscillating power conversion unit is provided only on the long arm side of the oscillating beam 6 has an amplitude only on the long arm side of the oscillating beam 6. Since a limiting device may be provided, the configuration is simpler and lower in cost than the symmetrical configuration in which two vibration power conversion units are provided.
In addition, since the configuration having the asymmetric structure as described above and the vibration power conversion unit provided only on the long arm side of the swing beam 6 is a configuration in which only one vibration power conversion unit is provided, Since only one system of rectifying means and smoothing means in the power supply circuit 201 (see FIG. 6) is required, this point is also simpler and lower than the configuration of the symmetrical structure in which two vibration power converters are provided. Cost composition.

[Embodiment 2]
Next, FIG. 4 is a figure which shows the amplitude limiting device in the vibration electric power generating apparatus of 2nd Embodiment which concerns on this invention. The amplitude limiting device in the second embodiment is an amplitude limiting device 25 having a structure different from that of the amplitude limiting devices 9 to 12 shown in the first embodiment. The configuration of the vibration power generation device of the present embodiment is the same as the configuration of the vibration power generation device of the first embodiment except for the structure of the amplitude limiting device.
In the present embodiment, like the amplitude limiting devices 9 to 12 of the first embodiment shown in FIG. 1, one weight body of a pair of weight bodies 7 and 8 fixed to both ends in the longitudinal direction of the oscillating beam 6. The two amplitude limiting devices 25 are arranged on the upper wall 3b and the bottom 3a of the device case 2 corresponding to the moving direction 7 and the upper wall 3b and the bottom 3a of the device case 2 corresponding to the moving direction of the other weight body 8 are arranged. Two amplitude limiting devices 25 are arranged in the middle.

  The amplitude limiting device 25 according to this embodiment includes a bottomed cylindrical device case 26 formed of a magnetic material, a lid portion 27 having an opening 27a formed of a magnetic material, and a ring shape disposed at the bottom of the device case 26. Permanent magnet 28, magnetostrictive member 29 made of iron gallium alloy or iron cobalt alloy housed in device case 26 above permanent magnet 28, magnetic coil 30 wound around the outer periphery of magnetostrictive member 29, and device A ring-shaped permanent magnet 31 disposed at the top of the case 26 and a displacement member 32 that contacts the magnetostrictive member 29 and passes through the opening 27a of the lid 27 and protrudes to the outside.

  As described above, the permanent magnets 28 and 31 provided for supplying the magnetic bias have a ring shape, that is, a hollow shape, and an upper space including the magnetic coil 30, the device case 26 and the lid portion 27, and the magnetic coil 30. They are arranged so as to be respectively accommodated in the lower space formed by the device case 26, and are magnetized in the displacement direction of the displacement member 32. The permanent magnet 31 arranged at the upper part of the device case 26 is magnetized, for example, with the S pole at the upper end and the N pole at the lower end, and the permanent magnet 28 arranged at the bottom of the device case 26 is, for example, the S pole at the upper end and the lower end. The side is magnetized to the N pole. Thereby, in the magnetic path composed of the displacement member 32, the magnetostrictive member rod 29, the device case 26, and the lid portion 27, the permanent magnets 28 and 31 can efficiently apply a bias magnetic field without becoming magnetic resistance.

The magnetic yoke according to the present invention corresponds to the device case 26 and the lid portion 27.
In this embodiment, similarly to the amplitude limiting devices 9 to 12 of the first embodiment shown in FIG. 1, the swinging amplitude limiting device 25 of the present embodiment is arranged instead of the amplitude limiting devices 9 to 12 of FIG. Then, when the vibration energy in the vertical direction is transmitted from the vibration source 2 to the device case 3 of the vibration power generator 1, the oscillating beam 6 to which the vibration energy is transmitted through the support column 4 has the pin 5 as the rotation center. The pair of weights 7 and 8 that oscillate and are fixed to both ends of the oscillating beam 6 is in a primary mode resonance state.

When the pair of weights 7 and 8 collide with the displacement member 32 of the amplitude limiting device 25 disposed on the bottom 3a and the upper wall 3b by the oscillation of the oscillation beam 6, the displacement member 32 compresses and deforms the magnetostrictive member 29. Works. The lines of magnetic force change due to the compressive deformation of the magnetostrictive member 29, and an induced voltage (induced power) is generated in the magnetic coil 30 (coil winding) of the amplitude limiting device 25 according to the law of electromagnetic induction to generate vibration power.
As described above, when the four amplitude limiting devices 25 collide with the pair of weights 7 and 8 due to the swinging of the swing beam 6, each of the four amplitude limiting devices 25 has an induced voltage (induced power). To generate vibration.

  Therefore, when the amplitude limiting device 25 of the present embodiment is installed instead of the amplitude limiting devices 9 to 12 of the vibration power generation device 1 of FIG. 1, the pair of vibration power conversion units 13 and 14 is caused by the swing of the swing beam 6. While simultaneously generating vibration, the magnetostrictive member 29, the magnetic coil 30 wound around the magnetostrictive member 29, the permanent magnets 28 and 31, the magnetic yoke (device case 26, lid portion 27), the pair of weights 7, Since the four amplitude limiting devices 25 each including the displacement member 32 that transmits the eight collisions to the magnetostrictive member 29 perform vibration power generation, the power generation efficiency can be further improved.

Even if the forming member of the displacement member 32 is not a magnetic material, the amplitude limiting device 25 performs a function of vibration power generation. However, the displacement member 32, the magnetostrictive member rod 29, the device case 26, and the lid portion 27 can That is, since the magnetic closed loop is configured to improve the power generation efficiency, it is preferable that the material for forming the displacement member 32 is made of a magnetic material as in the case 28 and the lid 27.
Here, the circuit block configuration of the power circuit used in the vibration power generator of the second embodiment is the same as that of the power circuit 201 used in the vibration power generator 1 of the first embodiment, and the circuit block configuration is not shown. To do. In the configuration in which the amplitude limiting devices 9 to 12 in the vibration power generator 1 of the first embodiment shown in FIG. 1 are replaced with the amplitude limiting device 25 as in the second embodiment, the swing beam 6 swings. When the four amplitude limiters 25 collide with the pair of weights 7 and 8, in addition to the vibration power converters 13 and 14, the four amplitude limiters 25 also generate induced voltages (induced powers). To generate vibration. Therefore, in addition to the rectifying means 202a and 202b and the smoothing means 203a and 203b corresponding to the magnetic coils 18 and 22 (coil windings) of the vibration power converters 13 and 14, the magnetic coils 30 of the four amplitude limiting devices 25 are provided. Four rectifying means for rectifying each AC voltage generated in the (coil winding) and four smoothing means for smoothing the rectified signals of the four rectifying means are further provided. The power storage means and the output means are one system common to the two smoothing means 203a and 203b corresponding to the vibration power converters 13 and 14 and the four smoothing means corresponding to the four amplitude limiting devices 25. (The power storage means 205 and the output means 206 in FIG. 6) may be sufficient.

  In FIG. 4, as permanent magnets for supplying magnetic bias, ring-shaped permanent magnets 28 and 31 include an upper space composed of a magnetic coil 30, a device case 26, and a lid 27, and a magnetic coil 30 and a device case. Although the configuration arranged so as to be accommodated in each of the lower spaces composed of 26 is shown, it is not limited to such a configuration. That is, only one ring-shaped permanent magnet can be accommodated in either the upper space composed of the magnetic coil 30, the device case 26 and the lid portion 27, or the lower space composed of the magnetic coil 30 and the device case 26. It is good also as a structure arrange | positioned. Further, for example, a permanent magnet for supplying magnetic bias may be configured to be interposed between the device case 26 and the lid 27, but the permanent magnet for supplying magnetic bias is in a magnetic path including the magnetostrictive member rod 29. In order to avoid the magnetic resistance, the configuration of the amplitude limiting device 25 shown in FIG. 4 is preferable.

[Embodiment 3]
Next, FIG. 5 is a front view showing a vibration power generator according to a third embodiment of the present invention.
In addition, the balance rod-like swing beam 6 that swings by receiving the vertical vibration shown in the first embodiment and members related to the swing beam 6 are assigned the same reference numerals, and the description thereof is omitted.
In the vibration power generation apparatus 40 of the present embodiment, a longitudinally intermediate portion is rotated by a device case 41 fixed to the upper part of the vibration source 2, a column 42 rising from the device case 41, and a pin 43 provided on the column 42. A swinging bar-like swinging beam 6 that is freely supported and swings around the pin 43 by receiving vertical vibration, and a pair of weights 7 and 8 fixed to both ends of the swinging beam 6 in the longitudinal direction. The amplitude limiting devices 9 and 10 disposed in the device case 41 corresponding to the moving direction of the weight body 7, the amplitude limiting devices 11 and 12 disposed in the device case 41 corresponding to the moving direction of the weight body 8, and swinging. A pair of vibration power converters 13 and 14 provided on both sides in the longitudinal direction of the beam 6 and a pin 43 provided on the support column 42 are rotatably supported in the middle in the longitudinal direction. Swing that swings around the center of rotation , A pair of weights 45 and 46 fixed to both ends in the longitudinal direction of the swing beam 44, and an amplitude limiting device 47 arranged horizontally in the device case 41 corresponding to the moving direction of the weight 45. , 48, and amplitude limiting devices 49, 50 arranged horizontally in the device case 41 corresponding to the moving direction of the weight body 46, and a pair of vibration power converters 51 provided on both sides in the longitudinal direction of the oscillating beam 44 , 52 and a power supply circuit 201B.

The rocking beam 44 is a member made of a magnetic material, and is arranged in the apparatus case 41 so as to extend in the vertical direction.
In addition, the peristaltic beam 6 and the peristaltic beam 44 may be a cross structure in which the peristaltic beam 6 and the peristaltic beam 44 are fixed to each other in an orthogonal state. Is preferred.

A pair of cutout portions 44a and 44b are formed by extending one side in the width direction in the longitudinal direction on both sides in the longitudinal direction of the oscillating beam 44, thereby forming a pair of cutout portions 44a and 44b, and extending along the cutout portions 44a and 44b. Magnetic rod-like portions 44c and 44d extending in the direction are formed.
Magnetostrictive rods 55 having permanent magnets 53 and 54 for supplying a magnetic bias at both ends extend in parallel to the magnetic rod-like portion 44c and are fixed to both longitudinal edges 44e and 44f of one notch 44a. In addition, a magnetic coil 56 is wound around the magnetostrictive rod 55. The magnetic coil 56 is connected to the power supply circuit 201A.

Further, magnetostrictive rods 59 with permanent magnets 57 and 58 for supplying a magnetic bias at both ends extend in parallel with the magnetic rod-like portion 44d at both longitudinal edges 44g and 44h of the other notch 44b. The magnetostrictive rod 59 has a magnetic coil 60 wound around it. The magnetic coil 60 is connected to the power supply circuit 201A.
The magnetostrictive rods 55 and 59 are members made of an iron gallium alloy or an iron cobalt alloy. Thus, the permanent magnets 53, 54, 57 and 58 generate a bias magnetic field. The permanent magnets 53 and 54 are, for example, magnetized with the S pole on the upper end and the N pole on the lower end, and the permanent magnets 57 and 58 are magnetized with the N pole on the upper end and the S pole on the lower end, for example.

  As a result, one of the pair of vibration power converters 51 and 52 includes a magnetic rod-shaped portion 44c extending in the longitudinal direction, the magnetostrictive rod 55, and the magnetic rod-shaped portion 44c and the magnetostrictive rod 55. The oscillating beam 44 (both edges 44e and 44f in the longitudinal direction) and the magnetic coil 56 are connected to each other, and the magnetic flux emanating from the north pole of the permanent magnet 53 passes through the magnetostrictive rod 55, and the permanent magnet 54 and magnetism. A magnetic path that reaches the south pole of the permanent magnet 53 through the rod-shaped portion 44c is formed.

  The other vibration power converter 52 includes a magnetic rod-shaped portion 44d extending in the longitudinal direction, a magnetostrictive rod 59, and an oscillating beam 44 (longitudinal direction) that magnetically couples the magnetic rod-shaped portion 44d and the magnetostrictive rod 59. Both edges 44g, 44h) and the magnetic coil 60, the magnetic flux from the N pole of the permanent magnet 57 passes through the magnetostrictive rod 59, passes through the permanent magnet 58, the magnetic rod-shaped portion 44d, and S of the permanent magnet 57. A magnetic path reaching the pole is formed.

The peristaltic beam 44 is not limited to a configuration made entirely of a magnetic material, and a loop of a magnetic circuit is formed corresponding to each of the magnetostrictive rods 55 and 59 on both sides in the longitudinal direction of the oscillating beam 44. It is sufficient if the structure is such that
The amplitude limiting devices 47 and 48 are a displacement member 23 fixed to the upper end of the swing beam 44 extending in the vertical direction and abutting against the weight body 45, and an inner wall of the device case 41 holding the displacement member 23. And a coil spring 24 fixed to the head. The amplitude limiting devices 49 and 50 are also fixed to the lower end of the oscillating beam 44 and come into contact with the weight body 46, and coil springs that hold the displacement member 23 and are fixed to the inner wall of the device case 41. 24. The coil springs 24 of the amplitude limiting devices 47 to 50 swing by swinging the swinging beam 44 around the pin 43 and elastically expanding and contracting when the weights 45 and 46 collide with the displacement member 23. In addition to limiting the amplitude of the beam 44, a force in the opposite direction to the colliding direction is applied to the weights 45 and 46 by its own spring restoring force.

Here, the support according to the present invention corresponds to the support column 42, the fulcrum according to the present invention corresponds to the pin 43, and the second rocking beam according to the present invention corresponds to the rocking beam 44, according to the present invention. The second amplitude limiter corresponds to the amplitude limiters 47 to 50, and the second vibration power converter according to the present invention corresponds to the vibration power converters 51 and 52.
The circuit block configuration of the power supply circuit 201A used in the vibration power generation device 40 of the third embodiment is the same as that of the power supply circuit 201 used in the vibration power generation device 1 of the first embodiment, and the illustration of the circuit block configuration is omitted. . Note that the vibration power generation apparatus 40 according to the third embodiment includes vibration power conversion units 51 and 52 in addition to the vibration power conversion units 13 and 14. For this reason, in addition to the rectifying means 202a and 202b and the smoothing means 203a and 203b corresponding to the magnetic coils 18 and 22 (coil windings) of the vibration power converters 13 and 14, the magnetic coil 56 of the vibration power converters 51 and 52 is provided. , 60 (coil windings) are further provided with two rectifying means for rectifying each AC voltage, and two smoothing means for smoothing the respective rectified signals of the two rectifying means. The power storage means and the output means are one system common to the two smoothing means 203a and 203b corresponding to the vibration power conversion sections 13 and 14 and the two smoothing means corresponding to the vibration power conversion sections 51 and 52. (The power storage means 205 and the output means 206 in FIG. 6) may be sufficient.

Next, operations and effects of the above-described third embodiment will be described.
When the vibration power generation apparatus 40 of this embodiment is installed on the vibration source 2 (highway or bridge), the vibration energy in the vertical direction transmitted from the vibration source 2 is oscillated by the oscillating beam 6 around the pin 43 as the rotation center. The pair of vibration power converters 13 and 14 vibrate and generate power by colliding with any of the amplitude limiting devices 9 to 12 provided in the moving direction of the weights 7 and 8 fixed to both ends of the swing beam 6. I do.

When the vibration energy in the horizontal direction is transmitted from the vibration source 2, the swing beam 44 to which the vibration energy is transmitted via the support column 42 swings around the pin 43 as a center of rotation. A pair of weight bodies 45 and 46 fixed to both ends are in a primary mode resonance state.
When the weight 45 collides with the amplitude limiter 47 due to the swing of the swing beam 44, a reaction force is input to the swing beam 44 from the displacement member 23 of the amplitude limiter 47, so that the vibration power converter 51 The magnetostrictive rod 55 is deformed in the compression direction.

The coil spring 24 of the amplitude limiter 47 that collides with the weight body 45 elastically expands and contracts to limit the amplitude of the oscillating beam 44 and to exert a pushing force in the opposite direction to the direction of collision due to its own spring restoring force. A swinging propulsive force (rotating operation with the pin 43 as a rotation center) is applied to the swinging beam 44 by being applied to the weight body 45.
Further, when the weight 45 collides with the amplitude limiter 48 due to the swing of the swing beam 44, a reaction force is input to the swing beam 44 from the displacement member 23 of the amplitude limiter 48, so that the vibration power conversion unit 51. The magnetostrictive rod 55 is deformed in the extending direction.

The coil spring 24 of the amplitude limiter 48 that collides with the weight body 45 elastically expands and contracts to limit the amplitude of the oscillating beam 44 and to exert a pressing force in the opposite direction to the direction of collision due to its own spring restoring force. A swinging propulsive force is applied to the swinging body 44 by being applied to the weight body 45.
Further, when the weight 46 collides with the amplitude limiter 49 due to the swing of the swing beam 44, a reaction force is input to the swing beam 44 from the displacement member 23 of the amplitude limiter 49, so that the vibration power conversion unit 52 The magnetostrictive rod 59 is deformed in the compression direction.

Further, the coil spring 24 of the amplitude limiting device 49 with which the weight 46 collides limits the amplitude of the oscillating beam 44 by elastic expansion and contraction, and pushes it up in the direction opposite to the direction of collision with its own spring restoring force. A force is applied to the weight body 46 and a swinging propulsive force is applied to the swinging beam 44.
When the weight 46 collides with the amplitude limiter 50 due to the swing of the swing beam 44, a reaction force is input to the swing beam 44 from the displacement member 23 of the amplitude limiter 50, so that the vibration power converter 52 The magnetostrictive rod 59 is deformed in the extending direction.

The coil spring 24 of the amplitude limiter 50 that collides with the weight body 46 limits the amplitude of the oscillating beam 44 by elastic expansion and contraction, and pushes it down in the direction opposite to the direction of collision due to its own spring restoring force. A force is applied to the weight body 46 and a swinging propulsive force is applied to the swinging beam 44.
In this way, the pair of oscillating power converters 51 and 52 of the oscillating beam 44 arranged in the vertical direction is repeatedly expanded and compressed on the magnetostrictive rods 55 and 59, and the lines of magnetic force are generated by the inverse magnetostrictive effect. It changes in an alternating shape. This change in magnetic field lines can generate vibrational power by generating an induced voltage (induced power) in the magnetic coils 56 and 60 (coil windings) of the pair of vibration power converters 51 and 52 according to the law of electromagnetic induction.

  Therefore, when the vertical vibration is transmitted from the vibration source 2 such as an expressway or a bridge, the vibration power generation device 40 of the present embodiment swings around the pin 43 as the rotation center and the amplitude limiting device 9. When a pair of vibration power converters 13 and 14 generate vibration power by colliding with any one of 12 to 12, and horizontal vibration is transmitted from the vibration source 2, the swing beam 44 swings around the pin 43 as a rotation center. Since the pair of vibration power converters 51 and 52 generate vibration power by moving and colliding with any of the amplitude limiters 47 to 50, power generation is efficiently performed with respect to vibration from an arbitrary direction from the vibration source 3. It can be performed.

In addition, although the apparatus of this embodiment uses the amplitude limiting apparatus 47-50 which consists of the displacement member 23 and the coil spring 24, it replaces with these and the vibration electric power generation shown in 2nd Embodiment (refer FIG. 4). When the amplitude limiting device 25 that performs the above is used, the power generation efficiency can be further improved.
Further, in FIG. 5, as an amplitude limiting device in the configuration of the oscillating beam 6 and the oscillating beam 44, the device case 41 corresponding to the moving direction of the weight body 45 is arranged in the horizontal direction. The configuration including both the amplitude limiting devices 47 and 48 arranged and the amplitude limiting devices 49 and 50 arranged horizontally in the device case 41 corresponding to the moving direction of the weight body 46 has been shown. It is not limited to. That is, a configuration in which the amplitude limiting device is disposed only at a position corresponding to the moving direction of one of the pair of weights, for example, the amplitude disposed horizontally in the device case 41 corresponding to the moving direction of the weight 45. A configuration including only the restriction devices 47 and 48 may also be adopted.

  Further, in FIG. 5, among the oscillating beam 6 and the oscillating beam 44, a pair of oscillating power converters on both sides in the longitudinal direction of the oscillating beam 44 is used as the oscillating power converter particularly in the configuration of the oscillating beam 44. Although the structure provided with 51 and 52 was shown, it is not limited to such a structure. That is, a configuration in which the vibration power conversion unit is provided only on one side of both sides of the swing beam 44 in the longitudinal direction, for example, a configuration in which only the vibration power conversion unit 51 is provided.

In the configuration in which the amplitude limiting device is disposed only at a position corresponding to the moving direction of one of the pair of weights as described above, the vibration power conversion unit has both sides of the rocking beam 44 in the longitudinal direction. Of these, it is provided on the side where the amplitude limiting device is arranged.
Further, in FIG. 5, a magnetic bias is supplied to both ends of the magnetostrictive rod 55 in the vibration power conversion unit 51, for example, as the vibration power conversion unit in the configuration of the rocking beam 44, particularly the rocking beam 44 side. However, the present invention is not limited to such a configuration, and a configuration in which a permanent magnet for supplying a magnetic bias is arranged only at one end of the magnetostrictive rod 55 may be adopted. . This also applies to the vibration power converter 52.

  In FIG. 5, among the oscillating beam 6 and the oscillating beam 44, the magnetic coil 56 is wound around the magnetostrictive rod 55 in the oscillating power converter 51, for example, as the oscillating power converter particularly in the configuration on the oscillating beam 44 side. Although the position where the magnetic coil is wound in the vibration power converter is not limited to the magnetostrictive rod, it is wound around another member that forms a magnetic path together with the magnetostrictive rod. Also good. That is, in the vibration power converter 51, for example, a magnetic coil may be wound around the magnetic rod-shaped portion 44c, or a magnetic coil may be wound around both the magnetostrictive rod 55 and the magnetic rod-shaped portion 44c. This also applies to the vibration power converter 52.

  Further, the configuration of the oscillation beam 44 side in the vibration power generation apparatus 40 of the present embodiment is a symmetrical structure in which the oscillation beam 44 is centered on a support point by the pin 43 in the longitudinal direction, and the longitudinal direction of the peristaltic beam 44 is The mass of the weight body 45 fixed to both ends and the mass of the weight body 46 are not limited to the same configuration. In the vertical oscillating beam 44, the longitudinal direction is parallel to the direction of the gravitational field, so that the moments can be balanced even if the weight body 45 and the weight body 46 are not of equal mass. However, a configuration in which the mass of the lower weight body 46 is larger than the mass of the upper weight body 45 is more preferable in that the behavior after the balance is lost due to vibration is stable.

DESCRIPTION OF SYMBOLS 1,40 ... Vibration generator, 2 ... Vibration source, 3,41 ... Apparatus case, 3a ... Bottom part, 3b ... Upper wall, 4,42 ... Post, 5,43 ... Pin, 6,44 ... Swing beam, 7 , 8, 45, 46 ... weight, 9, 10, 11, 12, 47, 48, 49, 50 ... amplitude limiter, 13, 14, 51, 52 ... vibration power converter, 6a, 6b, 44a, 44b ... notches, 6c, 6d, 44c, 44d ... magnetic bar-like parts, 6e, 6f, 6g, 6h, 44e, 44f, 44g, 44h ... both longitudinal edges, 15, 16, 19, 20, 53, 54 , 57, 58 ... permanent magnets, 17, 21, 55, 59 ... magnetostrictive rods, 18, 22, 56, 60 ... magnetic coils, 23 ... displacement members, 24 ... coil springs, 25 ... amplitude limiting devices, 26 ... device cases. 27 ... Lid, 27a ... Opening, 28 ... Permanent magnet, 29 Magnetostrictive member, 30 ... magnetic coil, 31 ... permanent magnet, 32 ... displacement member, 201,201A ... power supply circuit

Claims (10)

A support that receives vibration from a vibration source;
A first oscillating beam that is supported at a middle portion in the longitudinal direction via a fulcrum provided on the support and oscillates around the fulcrum by receiving vibration;
A pair of weights fixed to both ends of the first swing beam;
A first amplitude limiting device that is arranged in a moving direction of at least one of the pair of weights and limits the amplitude of the first swing beam by a collision with the weight;
Between at least one side of the longitudinal direction across the fulcrum of the first oscillating beam, on the side where the first amplitude limiting device is disposed, the weight body that receives vibration and the first amplitude limiting device A vibration power generation apparatus comprising: a first vibration power conversion unit that generates electric power by extending or compressing a magnetostrictive member by an impact force caused by a collision. The first amplitude limiting device is disposed in a moving direction of a pair of weights fixed to both ends of the first swing beam;
2. The vibration power generator according to claim 1, wherein the first vibration power converter is provided on both sides in a longitudinal direction across the fulcrum of the first swing beam. A second oscillating beam extending in a direction perpendicular to the first oscillating beam and having a longitudinal intermediate portion supported by the support body through the fulcrum so as to freely oscillate;
A pair of weights fixed to both ends of the second oscillating beam;
A second amplitude limiting device that is arranged in a moving direction of at least one of the pair of weights and limits the amplitude of the second rocking beam by a collision with the weight;
Between at least the second amplitude limiting device disposed on the both sides in the longitudinal direction across the fulcrum of the second oscillating beam, the weight body receiving vibration and the second amplitude limiting device The vibration power generation apparatus according to claim 1, further comprising: a second vibration power conversion unit that generates electric power by extending or compressing the magnetostrictive member by an impact force caused by a collision. The second amplitude limiting device is disposed in a moving direction of a pair of weights fixed to both ends of the second swing beam;
4. The vibration power generator according to claim 3, wherein the second vibration power converter is provided on both sides in the longitudinal direction across the fulcrum of the second rocking beam. 5.   The first oscillating power converter includes a first magnetostrictive rod extending in the longitudinal direction, a first magnetic member disposed parallel to the direction perpendicular to the longitudinal direction with respect to the first magnetostrictive rod, and these 2. A first connecting member that magnetically connects the first magnetostrictive rod and the first magnetic member, and a first magnetic coil wound around the first magnetostrictive rod. 5. The vibration power generation apparatus according to any one of 4 above.   6. A first permanent magnet disposed at at least one of both ends of the first magnetostrictive rod and supplying a magnetic bias to the first magnetostrictive member and the first magnetic member. The vibration power generator described.   The second vibration power converter includes a second magnetostrictive rod extending in the longitudinal direction, a second magnetic member disposed in parallel to the direction perpendicular to the longitudinal direction with respect to the second magnetostrictive rod, and these A second connecting member that magnetically connects the second magnetostrictive rod and the second magnetic member, and a second magnetic coil wound around the second magnetostrictive rod. 6. The vibration power generation apparatus according to any one of claims 6.   8. A second permanent magnet disposed at at least one of both ends of the second magnetostrictive rod and supplying a magnetic bias to the second magnetostrictive member and the second magnetic member. The vibration power generator described.   The amplitude limiting device includes a displacement member that receives an impact force due to the collision of the weight body and a spring member that holds the displacement member. The spring member collides with the weight body due to its own spring restoring force. The vibration power generator according to any one of claims 1 to 8, wherein a force is applied to push back the weight body in a direction opposite to the direction.   The amplitude limiting device includes a magnetostrictive member, a magnetic coil wound around the magnetostrictive member, a magnetic yoke that forms a magnetic path between the magnetostrictive member, and an impact force caused by the collision of the weight body to the magnetostrictive member. The vibration power generator according to claim 1, further comprising a displacement member that transmits the displacement member.

Images