阅读说明：本技术 一种压电与电磁复合能量环形俘获装置 (Piezoelectric and electromagnetic composite energy annular capture device ) 是由 施阁 徐苴邴 曾文涛 施浙斌 林如斌 王晨宇 胡项展 曾传军 于 2021-09-09 设计创作，主要内容包括：本发明公开了一种压电与电磁复合能量环形俘获装置,包括圆环管、两个圆环连接件、圆环盖、三个磁球、线圈、以及压电悬臂梁,所述的压电悬臂梁包括质量块永磁体、弹性基板以及压电陶瓷纤维片,压电悬臂梁的一端通过圆环盖固定在圆环管上,另一端包含质量块永磁体,处于自由状态,所述的圆环盖通过两个圆环连接件与圆环管相连,线圈缠绕在圆环管上,将磁球放入圆环管,磁球在圆环管中滑动时一边通过与质量块永磁体的磁力作用激励压电陶瓷纤维片,一边通过与线圈的相对运动产生电磁感应现象输出电能,该装置可以将周边的振动能量通过压电与电磁效应转换为电能,适用于俘获人体活动时产生的振动能。(The invention discloses a piezoelectric and electromagnetic composite energy ring capture device, which comprises a ring tube, two ring connectors, a ring cover, three magnetic balls, a coil and a piezoelectric cantilever beam, wherein the piezoelectric cantilever beam comprises a mass block permanent magnet, an elastic substrate and a piezoelectric ceramic fiber sheet, one end of the piezoelectric cantilever beam is fixed on the ring tube through the ring cover, the other end of the piezoelectric cantilever beam comprises the mass block permanent magnet and is in a free state, the ring cover is connected with the ring tube through the two ring connectors, the coil is wound on the ring tube, the magnetic balls are placed in the ring tube, the magnetic balls slide in the ring tube while exciting the piezoelectric ceramic fiber sheet through the magnetic force action of the mass block permanent magnet and generating an electromagnetic induction phenomenon to output electric energy through the relative motion with the coil, the device can convert the peripheral vibration energy into electric energy through the piezoelectric and electromagnetic effects, is suitable for capturing the vibration energy generated by the human body during the activity.)

1. A piezoelectric and electromagnetic composite energy ring capture device comprises a circular ring tube (1), two circular ring connecting pieces (2), a circular ring cover (3), three magnetic balls (4), a coil (5) and a piezoelectric cantilever beam (9), wherein the piezoelectric cantilever beam (9) comprises a mass block permanent magnet (6), an elastic substrate (7) and a piezoelectric ceramic fiber sheet (8), one end of the piezoelectric cantilever beam (9) is fixed on the circular ring tube (1) through the circular ring cover (3), the other end of the piezoelectric cantilever beam comprises the mass block permanent magnet (6) and is in a free state, the circular ring cover (3) is connected with the circular ring tube (1) through the two circular ring connecting pieces (2), the coil (5) is wound on the circular ring tube (1) to place the magnetic balls (4) into the circular ring tube (1), and the piezoelectric ceramic fiber sheet (8) is excited under the magnetic force action of the permanent magnet mass block (6) when the magnetic balls (4) slide in the circular ring tube (1), on one side, the device generates an electromagnetic induction phenomenon through relative motion with the coil (5) to output electric energy, and the device can convert peripheral vibration energy into electric energy through piezoelectric and electromagnetic effects and is suitable for capturing the vibration energy generated during human body movement.

2. The piezoelectric and electromagnetic composite energy ring capture device according to claim 1, wherein the piezoelectric cantilever beam (9) can be excited by sliding the magnetic ball (4) in the circular tube (1), and the other side and the coil (5) generate electromagnetic induction to output electric energy.

3. A piezoelectric and electromagnetic combined energy toroidal trapping device according to claim 1, wherein the efficiency of trapping vibrational energy can be increased by superposition of magnetic balls (4), the higher the number of magnetic balls (4) is, the higher the efficiency is.

4. The piezoelectric and electromagnetic combined energy ring capture device according to claim 1, wherein in order to reduce the frictional resistance of the magnetic ball (4) in the circular tube (1), the device can be made of glass or other materials.

5. A piezoelectric and electromagnetic combined energy toroidal trapping device according to claim 1, wherein said magnetic ball (4) is associated with a mass permanent magnet (6), which may be a ferrite magnet or a rare earth permanent magnet.

Technical Field

The invention belongs to the technical field of vibration energy capture, and particularly relates to a piezoelectric and electromagnetic composite energy annular capture device.

Background

With the continuous development of semiconductor devices and integrated circuit technologies, smart technologies can also be combined with wearable devices to form a unique network depending on the human body, and it is expected that the perception of the human body can be enhanced by various wearable devices. Under the demands of many fields and the stimulation of rapid development of the internet, Huashi, apples, millets, Sony and other electronic equipment businesses are at a large time looking at wearable equipment and serve as a high-point for future electronic business competition. However, the power consumption of these wearable devices is increasing continuously in applications of realizing various functions, which leads to the drawback of power supply problem, and thus the power supply problem of the wearable devices gradually becomes a research hotspot, the batteries of the conventional wearable devices can be divided into two categories, one of which is that button batteries are used as main power supply units, and need to be replaced periodically and cannot be charged, and data transmission of the wearable devices is also interrupted when the batteries are replaced by detaching the devices, which brings great invariance to users. The other type is that the lithium battery is used as a main power supply unit of the equipment, an external charging wire and a charging socket are needed, and the standby time is only several months at the longest. Therefore, the problems of power endurance of the wearable device, heavy battery size and the like are solved.

Currently, the existing environmental vibration energy trapping forms are mainly classified into electromagnetic type, electrostatic type and piezoelectric type. The single piezoelectric vibration energy capture device has larger output voltage, smaller output current and capacitive output impedance; the single electromagnetic vibration energy capture device has small output voltage, large output current and inductive output impedance. Moreover, the electromechanical conversion efficiency and the output power of the two single forms are low, so that the two vibration energy capture modes are coupled to improve the acquisition efficiency.

The invention discloses a piezoelectric and electromagnetic composite energy ring capture device, which comprises a ring tube, two ring connectors, a ring cover, three magnetic balls, a coil and a piezoelectric cantilever beam, wherein the piezoelectric cantilever beam comprises a mass block permanent magnet, an elastic substrate and a piezoelectric ceramic fiber sheet, one end of the piezoelectric cantilever beam is fixed on the ring tube through the ring cover, the other end of the piezoelectric cantilever beam comprises the mass block permanent magnet and is in a free state, the ring cover is connected with the ring tube through the two ring connectors, the coil is wound on the ring tube, the magnetic balls are placed in the ring tube, the magnetic balls slide in the ring tube while exciting the piezoelectric ceramic fiber sheet through the magnetic force action of the mass block permanent magnet and generating an electromagnetic induction phenomenon to output electric energy through the relative motion with the coil, the device can convert the peripheral vibration energy into electric energy through the piezoelectric and electromagnetic effects, is suitable for capturing the vibration energy generated by the human body during the activity.

Disclosure of Invention

The purpose of the invention is as follows: the piezoelectric and electromagnetic composite energy annular capture device has the advantages that the collection efficiency of vibration energy is improved in a piezoelectric and electromagnetic composite energy collection mode, and the problem of low energy capture efficiency during human body activities is solved by utilizing an up-conversion mode.

In order to realize the invention, the technical scheme is as follows: a piezoelectric and electromagnetic composite energy annular capture device comprises a circular ring tube, two circular ring connecting pieces, a circular ring cover, three magnetic balls, a coil and a piezoelectric cantilever beam, the piezoelectric cantilever beam comprises a mass block permanent magnet, an elastic substrate and a piezoelectric ceramic fiber piece, one end of the piezoelectric cantilever beam is fixed on the circular ring tube through a circular ring cover, the other end of the piezoelectric cantilever beam comprises the mass block permanent magnet and is in a free state, the ring cover is connected with the ring pipe through two ring connecting pieces, the coil is wound on the ring pipe, the magnetic ball is placed in the ring pipe, the piezoelectric ceramic fiber sheet is excited under the action of magnetic force of the mass block permanent magnet when the magnetic ball slides in the ring pipe, and the electromagnetic induction phenomenon is generated through the relative motion of the magnetic ball and the coil to output electric energy, the device can convert the peripheral vibration energy into electric energy through piezoelectric and electromagnetic effects, and is suitable for capturing the vibration energy generated during the movement of a human body.

The invention has the beneficial effects that:

1. the invention adopts non-contact magnetic coupling effect, can convert external low-frequency vibration into high-frequency vibration of the natural frequency of the piezoelectric cantilever beam, and realizes up-conversion of a working frequency band.

2. The invention adopts the collection of the piezoelectric and electromagnetic composite energy, and can improve the collection efficiency of the vibration energy and the output power of the device.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a piezoelectric cantilever according to the present invention;

FIG. 3 is a schematic view of a circular ring tube according to the present invention;

FIG. 4 is a schematic diagram of the polarity of a magnetic sphere according to the present invention;

wherein: 1: a circular ring tube; 2: a circular ring connector; 3: a ring cover; 4: a magnetic ball; 5: a coil; 6: a mass block permanent magnet; 7: an elastic substrate; 8: a piezoelectric ceramic fiber sheet; and 9, piezoelectric cantilever beam.

Detailed Description

A piezoelectric and electromagnetic composite energy ring capture device comprises a circular ring tube (1), two circular ring connecting pieces (2), a circular ring cover (3), three magnetic balls (4), a coil (5) and a piezoelectric cantilever beam (9), wherein the piezoelectric cantilever beam (9) comprises a mass block permanent magnet (6), an elastic substrate (7) and a piezoelectric ceramic fiber sheet (8), one end of the piezoelectric cantilever beam (9) is fixed on the circular ring tube (1) through the circular ring cover (3), the other end of the piezoelectric cantilever beam comprises the mass block permanent magnet (6) and is in a free state, the circular ring cover (3) is connected with the circular ring tube (1) through the two circular ring connecting pieces (2), the coil (5) is wound on the circular ring tube (1) to place the magnetic balls (4) into the circular ring tube (1), and the piezoelectric ceramic fiber sheet (8) is excited under the magnetic force action of the permanent magnet mass block (6) when the magnetic balls (4) slide in the circular ring tube (1), on one side, the device generates an electromagnetic induction phenomenon through relative motion with the coil (5) to output electric energy, and the device can convert peripheral vibration energy into electric energy through piezoelectric and electromagnetic effects and is suitable for capturing the vibration energy generated during human body movement.

The working principle is as follows: the device utilizes the magnetic action of a magnetic ball (4) and a mass block permanent magnet (6) to excite a piezoelectric ceramic fiber sheet (8) when the magnetic ball slides in a circular ring tube (1), and generates an electromagnetic induction phenomenon through the relative motion with a coil (5) to output electric energy.

Preferably, the piezoelectric cantilever beam (9) can be excited by sliding the magnetic ball (4) in the circular tube (1), and the other side and the coil (5) generate an electromagnetic induction phenomenon to output electric energy.

Preferably, the efficiency of capturing the vibration energy can be improved by the superposition of the magnetic balls (4), and the efficiency is higher when the number of the magnetic balls (4) is larger.

Preferably, in order to reduce the frictional resistance of the magnetic ball (4) in the circular ring pipe (1), the glass material can be selected, and other materials can also be selected.

The technical features mentioned above are combined with each other to form various embodiments which are not listed above, and all of them are regarded as the scope of the present invention described in the specification; also, modifications and variations may be suggested to those skilled in the art in light of the above teachings, and it is intended to cover all such modifications and variations as fall within the true spirit and scope of the invention as defined by the appended claims.