JP2016005332A - Power generator and electronic apparatus including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power generator capable of generating a large amount of power in a wide frequency band to efficiently generating electric power from environmental vibrations which are widely generated in daily life, and an electronic apparatus including the same.SOLUTION: A power generator 1a includes: a pair of weights 2a and 2b each of which is connected to yokes 6a, 6b respectively; a frame 3a fixed to a vibration source 10; a pair of magnetostrictors 4a and 4b; a pair of magnetic coils 5a and 5b wound on the magnetostrictors 4a and 4b respectively; a pair of yokes 6a and 6b which are constituted of a magnetic member, one end of which is fixed to a post 8a and the other end is connected to the weight 2a, 2b respectively; permanent magnets 7a, 7b and 7c, 7d for bias magnetic field, which are connected to the yokes 6a, 6b and the magnetostrictors 4a, 4b respectively; a post 8a fixed to the frame 3a; a first and a second vibration power converter each of which is constituted of power supply circuits 9a, 9b connected to the magnetic coil 5a and 5b respectively; and a vibration source 10.

Description

  The present invention relates to a power generation device and an electronic apparatus including the power generation device.

  Conventionally, as a power generation device, one that generates power by rotating a generator using thermal power, hydraulic power, nuclear power, wind power, or the like is generally used. In portable devices, for example, a solar cell that generates power using sunlight or illumination light or a power generation device that generates power using daily vibration is known, for example, as described in Patent Document 1 below.

  FIG. 7 is a diagram illustrating a configuration example of the power generation device described in Patent Document 1. In the configuration example of FIG. 7, the power generation device 100 includes an elastic body 31, a weight body 32, a displacement transmission member 33, a piezoelectric body 34, a support body 35, a rectifier circuit 36, a charging circuit 37, and an oscillation circuit 38. A large amount of power generation is obtained only when vibration occurs at a constant resonance frequency determined by the spring constant and mass of the mass 31 and the weight body 32.

JP 2000-197373 A (FIG. 3)

  In the conventional power generation apparatus shown in FIG. 7, it is rare that the daily environmental vibration vibrates at a constant frequency, and vibrates in a frequency band having a certain width. In addition, there is a problem that a sufficient amount of power generation cannot be obtained when power is generated by daily environmental vibration using a conventional power generation device.

  Therefore, in order to solve the above-described problems, the present invention provides a power generator capable of obtaining a large amount of power generation in a wide frequency band in order to efficiently extract power from the environmental vibration phenomenon that occurs widely on a daily basis, and An object of the present invention is to provide an electronic apparatus equipped with the same.

  In order to solve the above-mentioned problem, in the invention described in claim 1, a support body that receives vibration from a vibration source, at least two or more vibration power conversion means that are configured to be fixed to the support body and vibrate, And at least two weights configured to vibrate by being connected to at least two vibration power conversion means one by one, and the weights of the plurality of weights are all different. And

  According to a second aspect of the present invention, in the first aspect of the present invention, a permanent magnet and an electromagnet are provided at opposite positions of the weight body and the support, and the repulsive force and the attractive force are changed by changing the polarity of the electromagnet. It is made to generate.

  According to a third aspect of the present invention, in the first aspect of the present invention, a pair of permanent magnets is provided at a position opposite to the weight body and the support, and the polarity is set so that the pair of permanent magnets repel each other. It is characterized by being.

  According to a fourth aspect of the present invention, there is provided a support that receives vibration from a vibration source, vibration power conversion means that is fixed to the support and configured to vibrate, and is vibrated by being connected to the vibration power conversion means. And a permanent magnet and an electromagnet are provided at positions opposed to the weight body and the support body.

  According to a fifth aspect of the present invention, there is provided a support body that receives vibration from a vibration source, at least two or more vibration power conversion means that are fixed to the support body and vibrate, and the at least two or more vibration power conversion means. And at least two weights configured to vibrate by being connected to the vibration power conversion means one by one, and the weights of the plurality of weights are all the same.

  According to a sixth aspect of the present invention, in the fifth aspect of the present invention, a permanent magnet and an electromagnet are provided at opposite positions of the weight body and the support, and the repulsive force and the attractive force are changed by changing the polarity of the electromagnet. It is made to generate.

  According to a seventh aspect of the present invention, in the fifth aspect of the present invention, a pair of permanent magnets is provided at a position opposite to the weight body and the support, and the polarity is set so that the pair of permanent magnets repel each other. It is characterized by being.

  According to an eighth aspect of the present invention, there is provided a support that receives vibration from a vibration source, vibration power conversion means that is fixed to the support and configured to vibrate, and is connected to the vibration power conversion means to vibrate. And a pair of permanent magnets are provided at opposing positions of the weight body and the support body.

  According to a ninth aspect of the invention, in the invention according to any one of the first to eighth aspects, the vibration power conversion means produces an inverse magnetostriction effect due to stress on the magnetostriction means accompanying vibration. The magnetic flux changes to generate a counter electromotive force.

  According to a tenth aspect of the present invention, there is provided an electronic apparatus including the power generation device according to any one of the first to ninth aspects.

  According to the present invention, since it is possible to efficiently extract power from environmental vibrations caused by daily random frequencies, it is possible to effectively use the vibration energy that has been wasted in the past, and it is necessary to replace power supply facilities and batteries. It becomes possible to make maintenance-free by using it as an operating power source for the wireless sensor.

It is a figure which shows the structure of the electric power generating apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows the other structural example (the 1) of the electric power generating apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows the other structural example (the 2) of the electric power generating apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows the structure of the electric power generating apparatus which concerns on the 2nd Embodiment of this invention. It is a figure which shows the structure of the electric power generating apparatus which concerns on the 3rd Embodiment of this invention. It is a figure which shows the structure of the power supply circuit used for the electric power generating apparatus which concerns on the 1st thru | or 3rd embodiment. It is a figure which shows the example of 1 structure of the conventional electric power generating apparatus.

Hereinafter, embodiments of the present invention will be described in detail.
[Embodiment 1]
FIG. 1 is a diagram illustrating a configuration of a power generation device according to a first embodiment of the present invention. In FIG. 1, the power generator 1a according to the first embodiment of the present invention is configured such that a plurality of vibration power converters are provided on the left and right of a column 8a fixed to the frame 3a. That is, the first vibration power converter includes a weight 2a connected to the yoke 6a, a frame 3a fixed to the vibration source 10, a magnetostrictive element 4a, a magnetic coil 5a wound around the magnetostrictive element 4a, Fixed to the frame 3a, a yoke 6a composed of a magnetic member, one fixed to the column 8a and the other connected to the weight 2a, the bias field permanent magnets 7a and 7b connected to the yoke 6a and the magnetostrictive element 4a. The support column 8a, the power supply circuit 9a connected to the magnetic coil 5a, and the vibration source 10 are configured. The yoke 6a, the permanent magnet 7a, the magnetostrictive element 4a, and the permanent magnet 7b constitute a magnetic circuit.

  Then, the frame 3a and the support column 8a vibrate due to the vibration of the vibration source 10 that vibrates in the direction of the up and down arrows shown at the left end of the figure. The configured resonance means resonates according to the following equation (1).

Here, k is a spring constant value corresponding to the substantial elastic modulus of the resonance means, and m is a mass value corresponding to the substantial mass of the resonance means. f is a resonance frequency, which is a predetermined value if the spring constant value k and mass value m of the resonance means are constant.

  When the magnetostrictive element 4a expands and contracts due to resonance, the magnetic flux of the magnetostrictive element 4a changes due to the inverse magnetostrictive effect, thereby generating a counter electromotive force in the magnetic coil 5a. Therefore, the yoke 6a, the permanent magnet 7a, the magnetostrictive element 4a, and the permanent magnet 7b constitute a (first) vibration power converter.

  The second vibration power converter includes a weight 2b connected to the yoke 6b, a frame 3a fixed to the vibration source 10, a magnetostrictive element 4b, a magnetic coil 5b wound around the magnetostrictive element 4b, Is fixed to the column 8a, the other is fixed to the frame 3a, the yoke 6b made of a magnetic member connected to the weight 2b, the bias field permanent magnets 7c and 7d connected to the yoke 6b and the magnetostrictive element 4b, and the frame 3a. The power supply circuit 9b connected to the magnetic pole 5b, and the vibration source 10 are configured. The yoke 6b, the permanent magnet 7c, the magnetostrictive element 4b, and the permanent magnet 7d constitute a magnetic circuit.

  Then, the frame 3a and the support column 8a vibrate due to the vibration of the vibration source 10 that vibrates in the direction of the up and down arrows shown at the left end of the figure. The configured resonance means resonates according to the above equation (1).

  When the magnetostrictive element 4b expands and contracts due to resonance, the magnetic flux of the magnetostrictive element 4b changes due to the inverse magnetostrictive effect, thereby generating a counter electromotive force in the magnetic coil 5b. Therefore, the yoke 6b, the permanent magnet 7c, the magnetostrictive element 4b, and the permanent magnet 7d constitute a (second) vibration power converter.

  In the above description, the weight 2a included in the first vibration power conversion device and the weight 2b included in the second vibration power conversion device have different masses. Since the resonance frequency of the vibration power converter of this embodiment is different from the resonance frequency of the second vibration power converter, the frequency band that can be generated by the vibration power converter is widened, and a large amount of power generation can be obtained in a wide frequency band. .

  FIG. 2 is a diagram illustrating another configuration example (No. 1) of the power generation device according to the first embodiment of the present invention. In FIG. 2, a power generator 1a ′ according to another configuration example (part 1) of the present invention is permanently attached to the weight 2a and the frame 3a of the power generator 1a according to the first embodiment of the present invention shown in FIG. Except for the fact that the magnets 11a and 11b are provided and the permanent magnets 11c and 11d are provided on the weight 2b and the frame 3a, respectively, the rest of the configuration is related to the first embodiment of the present invention shown in FIG. Since it is the same as the power generation device 1a, the description thereof will be omitted.

  In FIG. 2, the polarities of the permanent magnets 11a and 11b and the permanent magnets 11c and 11d are set so as to repel each other by their magnetic force. For this reason, since a larger acceleration is generated by applying a repulsive force to the vibration of the weight 2a and the weight 2b due to resonance, as a result, a large amount of power generation can be obtained as the first and second vibration power converters. I am doing so. Further, similarly to the power generation device 1a according to the first embodiment of the present invention shown in FIG. 1, the weight 2a included in the first vibration power conversion device and the weight 2b included in the second vibration power conversion device Since the masses are different from each other and the resonance frequency of the first vibration power converter differs from the resonance frequency of the second vibration power converter due to the vibration generated by the vibration source 10, the vibration power converter The frequency band in which power can be generated is widened, and a large amount of power generation can be obtained in a wide frequency band.

  FIG. 3 is a diagram illustrating another configuration example (No. 2) of the power generation device according to the first embodiment of the present invention. In FIG. 3, a power generator 1a ″ according to another configuration example (No. 2) of the present invention is permanently attached to the weight 2a and the frame 3a of the power generator 1a according to the first embodiment of the present invention illustrated in FIG. Except for the point that the magnet 11a and the electromagnet 11e are provided, and the weight 2b and the frame 3a are provided with the permanent magnet 11c and the electromagnet 11f, the remaining configuration is the same as that of the first embodiment of the present invention shown in FIG. Since it is the same as the electric power generating apparatus 1a which concerns, description is abbreviate | omitted.

  In FIG. 3, a permanent magnet 11a and an electromagnet 11e, and a permanent magnet 11c and an electromagnet 11f are provided, and a repulsive force and an attractive force are generated between the permanent magnets 11a and 11c by the polarity applied to the electromagnets 11e and 11f. To be able to.

  When the polarities of the electromagnets 11e and 11f are set so as to repel each other with the permanent magnets 11a and 11c, another configuration example of the power generator according to the first embodiment of the present invention shown in FIG. As in the case of (No. 1), a repulsive force is applied to the vibrations of the weights 2a and 2b due to resonance and a larger acceleration is generated. As a result, the first and second vibration power converters are obtained. A large amount of power generation can be obtained. On the other hand, when the polarities of the electromagnets 11e and 11f are set so as to attract each other with the permanent magnets 11a and 11c, the resonance frequencies of the first and second vibration power converters can be adjusted. When the vibration frequency of the vibration source 10 deviates from the resonance frequency of the resonance means, it is possible to obtain a large amount of power generation by adjusting the resonance frequency.

  As described above, the power generation device according to the first embodiment of the present invention shown in FIGS. 1 to 3 has a configuration including a plurality of vibration power conversion devices on the left and right of the support column 8a fixed to the frame 3a. When the weights of the weights 2a and 2b are changed, the resonance frequencies can be made different between the first vibration power converter and the second vibration power converter, so that the weights of the weights 2a and 2b are appropriately changed. Thus, even when the vibration frequency of the vibration source 10 changes in a certain bandwidth, a stable power generation amount can be obtained.

  On the other hand, when the weights of the weights 2a and 2b are the same, the resonance frequency is the same in the first vibration power converter and the second vibration power converter, so that one vibration power converter is configured as a whole. In other words, a large amount of power generation can be obtained from one oscillating power converter. The illustrated example shows a configuration example when the weights of the weights 2a and 2b are changed, and the illustration is omitted when the weights of the weights 2a and 2b are the same.

Here, the configuration of the power supply circuits 9a to 9d according to the embodiment of the present invention will be described with reference to FIG. In FIG. 6, a configuration example of the power supply circuit used in the power generation device according to the first embodiment shown in FIGS. 1 to 3 will be described, but the configuration also in the power generation devices according to the second and third embodiments. Since it is basically the same, the description thereof will be omitted. That is,
The entire power supply circuit including the power supply circuits 9a and 9b shown in FIGS. 1 to 3 includes a rectifying means 91 for rectifying an alternating current generated in the magnetic coils (coil windings) 5a and 5b, as shown in FIG. 97, smoothing means 92, 98 for smoothing the pulsating current rectified by the rectifying means 91, 97, power storage means 94 composed of a secondary battery or a capacitor, and the power stored in the power storage means 94 is output to the output terminal 96 Control means for controlling the output means 95 and the smoothing outputs of the smoothing means 92 and 98 to be stored in the power storage means 94 as charge inputs and to output the power stored in the power storage means 94 from the output means 95 to the output terminal 96. 93. Here, the rectifying means 91 and the smoothing means 92 corresponding to the magnetic coil (coil winding) 5a are provided in the power supply circuit 9a, and the rectifying means 97 and the smoothing means 98 corresponding to the magnetic coil (coil winding) 5b are the power supply. It is provided in the circuit 9b. Power storage means 94, output means 95, control means 93, and output terminal 96, which are common circuit elements for magnetic coil (coil winding) 5a and magnetic coil (coil winding) 5b, are connected to power supply circuits 9a and 9b. Any of these may be provided. 1 to 3, the power supply circuits 9a and 9b are shown as independent circuit units, but the power supply circuits 9a and 9b may be configured as an integrated circuit unit. In addition, about the power supply circuit 9c used for the electric power generating apparatus which concerns on 2nd Embodiment mentioned later, and the power supply circuit 9d used for the electric power generating apparatus which concerns on 3rd Embodiment, the magnetic coil (coil winding) 5a is each magnetic coil. The configuration is the same as that shown in FIG. 6 except that it is read as (coil winding) 5c, 5d, and the magnetic coil (coil winding) 5b, the rectifying means 97 and the smoothing means 98 are not required.

[Embodiment 2]
FIG. 4 is a diagram illustrating a configuration of a power generation device according to the second embodiment of the present invention. In FIG. 4, a power generator 1b according to a second embodiment of the present invention includes a weight 2c connected to a yoke 6c, a frame 3b fixed to the vibration source 10, a magnetostrictive element 4c, and a magnetostrictive element 4c. A rotated magnetic coil 5c, a yoke 6c made of a magnetic member, one of which is fixed to the column 8b and the other connected to the weight 2c, and a bias magnetic field permanent magnet 7e connected to the yoke 6c and the magnetostrictive element 4c. , 7f, a support 8b fixed to the frame 3b, one permanent magnet 11g fixed to the weight 2c at the opposite position so that the mutual magnetic force repels, and the other permanent magnet 11h fixed to the frame 3b, A power supply circuit 9c connected to the magnetic coil 5c and a vibration source 10 are included.

  Then, the frame 3b and the support column 8b vibrate due to the vibration of the vibration source 10 that vibrates in the direction of the up and down arrows shown at the left end of the figure. The configured resonance means resonates according to the equation (1) described in the first embodiment.

  The yoke 6c, the permanent magnet 7e, the magnetostrictive element 4c, and the permanent magnet 7f constitute a magnetic circuit. When the magnetostrictive element 4c expands and contracts due to resonance, the magnetic flux of the magnetostrictive element 4c changes due to the inverse magnetostrictive effect, thereby generating a counter electromotive force in the magnetic coil 5c. Therefore, the yoke 6c, the permanent magnet 7e, the magnetostrictive element 4c, and the permanent magnet 7f constitute a vibration power converter.

  The polarities of the permanent magnets 11g and 11h are set so that they are repelled by the mutual magnetic force. For this reason, since a larger acceleration is generated by applying a repulsive force to the vibration of the weight 2c due to resonance, a large amount of power generation can be obtained as a vibration power converter as a result.

[Embodiment 3]
FIG. 5 is a diagram illustrating a configuration of a power generation device according to the third embodiment of the present invention. In FIG. 5, a power generator 1c according to the third embodiment of the present invention is a permanent magnet instead of the permanent magnet 11g and the permanent magnet 11h in the power generator 1b according to the second embodiment of the present invention shown in FIG. The magnet 11j and the electromagnet 11k are configured to face each other. In this embodiment, repulsive force and attractive force can be generated between the permanent magnet 11j by changing the polarity of the electromagnet 11k (changing the current direction).

  When the repulsive force is generated by changing the polarity of the electromagnet 11k, the operation is the same as that of the second embodiment, and a large amount of power generation can be obtained as in the second embodiment. On the other hand, when the attraction force is generated by changing the polarity of the electromagnet 11k, the resonance frequency can be adjusted. Therefore, when the vibration frequency of the vibration source 10 deviates from the resonance frequency of the resonance means, the resonance frequency is set. By adjusting, it is possible to obtain a large amount of power generation. Since other configurations are the same as those of the second embodiment, description thereof is omitted. In FIG. 5, the sign of the bias magnetic field generating permanent magnets 7e and 7g shown in FIG. 4 is changed to be the bias magnetic field generating permanent magnets 7g and 7h.

  By applying the power generation device of the present invention described above as a power supply device for a wireless sensor, it is possible to overcome the problems related to power supply in the wireless sensor, and to realize a maintenance-free wireless sensor that does not require a power supply facility. it can. In other words, the wireless sensor generally requires power supply from an external power supply or battery mounting as an operating power supply. However, when power is supplied from an external power supply, a new power supply is available if the power supply is not nearby. It is necessary to provide facilities, and when the battery is mounted, it is necessary to frequently replace the battery according to the battery life, and the power generation apparatus of the present invention is applied to the above-described problems in the power supply in the wireless sensor. This can be solved.

1a to 1c Power generation device 2a to 2d Weight 3a to 3c Frame 4a to 4d Magnetostrictive element 5a to 5d Magnetic coil (coil winding)
6a to 6d Yoke 7a to 7h Bias magnetic field generating permanent magnet 8a to 8c Post 9a to 9d Power supply circuit 10 Vibration source 11a to 11d, 11g to 11h, 11j Permanent magnet 11e to 11f, 11k Electromagnet 91, 97 Rectifying means 92, 98 Smoothing means 93 Control means 94 Power storage means 95 Output means 96 Output terminal

Claims (10)

  A support body that receives vibrations from a vibration source, at least two or more vibration power conversion means fixed to the support body and configured to vibrate, and one connection to each of the at least two or more vibration power conversion means And at least two or more weights configured to vibrate, and the weights of the plurality of weights are all made different.   2. The power generation according to claim 1, wherein a permanent magnet and an electromagnet are provided at opposite positions of the weight body and the support body, and a repulsive force and an attractive force are generated by changing the polarity of the electromagnet. apparatus.   The power generator according to claim 1, wherein a pair of permanent magnets is provided at a position opposite to the weight body and the support body, and the polarity is set so that the pair of permanent magnets repel each other.   A support body that receives vibration from a vibration source, vibration power conversion means that is fixed to the support body and configured to vibrate, and a weight body that is connected to the vibration power conversion means and configured to vibrate. And a permanent magnet and an electromagnet are provided at positions opposed to the weight body and the support body.   A support body that receives vibrations from a vibration source, at least two or more vibration power conversion means fixed to the support body and configured to vibrate, and one connection to each of the at least two or more vibration power conversion means And at least two or more weights configured to vibrate, and the weights of the plurality of weights are all made the same.   6. The power generation according to claim 5, wherein a permanent magnet and an electromagnet are provided at positions opposite to the weight body and the support body, and a repulsive force and an attractive force are generated by changing the polarity of the electromagnet. apparatus.   6. The power generator according to claim 5, wherein a pair of permanent magnets is provided at a position opposite to the weight body and the support body, and the polarity is set so that the pair of permanent magnets repel each other.   A support body that receives vibration from a vibration source, vibration power conversion means that is fixed to the support body and configured to vibrate, and a weight body that is connected to the vibration power conversion means and configured to vibrate. And a pair of permanent magnets are provided at positions opposed to the weight body and the support body.   9. The oscillating power conversion means generates a counter electromotive force by changing a magnetic flux by producing an inverse magnetostriction effect due to stress on the magnetostriction means caused by vibration. The power generation device according to one item.   An electronic device comprising the power generation device according to any one of claims 1 to 9, wherein the electronic device is configured.