CN108776280B - Piezoelectric energy collector testing device based on self-parameter dynamic vibration absorber - Google Patents

Abstract

A piezoelectric energy collector testing device based on a self-parameter dynamic vibration absorber, the present invention relates to a measuring device. The present invention generally adopts a simple cantilever beam structure to solve the problem of traditional piezoelectric energy collectors. Single, energy collection and vibration suppression of the base have great limitations, it includes exciter, upper plate, top plate, long head bolt, cantilever beam, piezoelectric ceramic sheet, acceleration sensor, lower plate, bottom plate , two mass blocks, multiple screws and multiple springs; the lower splint and the bottom plate are installed on the exciter, the upper splint is set above the lower splint, the bottom end of the screw is machined with external threads, and the long head bolts are set on the upper splint and the top plate The top of the long head bolt is machined with a rectangular groove, the bottom end of the cantilever beam is installed in the rectangular groove at the top of the long head bolt, and the piezoelectric ceramic sheet is pasted on one side of the cantilever beam. The invention belongs to piezoelectric energy collection. device testing technology.

Description

A Test Device for Piezoelectric Energy Harvester Based on Self-parameter Dynamic Vibration Absorber

technical field

The invention relates to a measuring device, in particular to a piezoelectric energy collector testing device based on a self-parameter dynamic vibration absorber, belonging to the technical field of piezoelectric energy collector testing.

Background technique

In recent years, the application scope of tiny electronic devices such as sensors has been expanding, and they have the characteristics of small energy consumption, huge quantity, wide distribution and harsh working environment. The traditional electrochemical cells that power them have shortcomings such as short lifespan and frequent replacement, which greatly increases the operating cost of such devices, so new energy supply methods are urgently needed.

There is abundant vibration energy in the external environment, especially in engineering practice, there is a lot of vibration energy that endangers the mechanical precision and life. If these energy are utilized, it will be able to supply energy for MEMS. Using piezoelectric materials to achieve electromechanical energy exchange, piezoelectric energy harvesters can continuously convert vibrational energy into electrical energy. In the past, the piezoelectric energy harvester usually adopts a simple cantilever beam structure, which is directly installed on the base. This device has a simple structure and a single function, and has great limitations in energy collection and vibration suppression of the base. .

SUMMARY OF THE INVENTION

In order to solve the problem that the traditional piezoelectric energy collector usually adopts a simple cantilever beam structure, the structure is simple, the function is single, and the energy collection and the vibration suppression of the base have great limitations, and further provides a Piezoelectric energy harvester test setup for self-parametric dynamic vibration absorbers.

The technical solution adopted by the present invention to solve the above problems is: it includes a vibration exciter, an upper splint, a top plate, a long head bolt, a cantilever beam, a piezoelectric ceramic sheet, an acceleration sensor, a lower splint, a bottom plate, two mass blocks, a plurality of The screw and multiple springs; the lower splint and the bottom plate are installed on the exciter from top to bottom, the upper splint is arranged above the lower splint, the bottom end of the screw is processed with an external thread, the bottom end of each screw is threadedly connected with the lower splint, the screw The top end is slidably connected with the upper splint and the top plate, each screw is sleeved with a spring, the top end of each spring is fixedly connected with the lower end surface of the upper splint, and the bottom end of each spring is fixedly connected with the upper end surface of the lower splint, The long head bolts are arranged on the upper splint and the top plate, and the long head bolts are threadedly connected with the upper splint and the top plate. The top of the long head bolts are machined with a rectangular groove, and the bottom end of the cantilever beam is installed in the rectangular groove at the top of the long head bolt. , the piezoelectric ceramic sheet is pasted on one side of the cantilever beam, the two mass blocks are relatively fixedly installed on the top of the cantilever beam through bolts, and the acceleration sensor is pasted on the upper end face of the lower splint.

The beneficial effects of the present invention are: by designing the beam and the system frequency to achieve a 1:2 relationship, the 1:2 internal resonance characteristic enables the unstressed beam to absorb energy from the system below and convert it into electrical energy, so as to achieve a more efficient Energy collection and vibration suppression effect; the present invention can also adjust the main vibration system spring 10, the number of nuts on the upper clamp plate 2 of the main vibration system, the weight of the mass block 5 and the position of the mass block 5 on the cantilever beam 6, so that the The invention can always be in an internal resonance state; the invention can also change the excitation frequency, so as to study the influence of the excitation frequency on the energy collection and vibration suppression effect of the dynamic vibration absorber; the invention can also change the excitation amplitude to study the effect of the excitation amplitude on the dynamic The influence of the vibration absorber on energy collection and vibration suppression effect; the invention can also change the size of the external load resistance, so as to study the influence of the external load resistance on the energy collection and vibration suppression effect of the dynamic vibration absorber.

Description of drawings

Fig. 1 is the overall structure front view of the present invention;

FIG. 2 is a side view of FIG. 1 .

Detailed ways

Embodiment 1: This embodiment is described with reference to FIGS. 1 to 2 . A piezoelectric energy collector testing device based on a self-parameter dynamic vibration absorber described in this embodiment includes a vibration exciter 1 , an upper splint 2 , and a top plate. 3. Long head bolt 4, cantilever beam 6, piezoelectric ceramic sheet 7, acceleration sensor 11, lower clamping plate 12, bottom plate 13, two mass blocks 5, multiple screws 9 and multiple springs 10; lower clamping plate 12 and bottom plate 13 It is installed on the exciter 1 from top to bottom, the upper clamp plate 2 is arranged above the lower clamp plate 12, the bottom end of the screw rod 9 is processed with an external thread, the bottom end of each screw rod 9 is threadedly connected with the lower clamp plate 12, and the top end of the screw rod 9 is connected to the lower clamp plate 12. The upper clamp plate 2 and the top plate 3 are slidably connected, each screw 9 is sleeved with a spring 10, and the top end of each spring 10 is fixedly connected with the lower end surface of the upper clamp plate 2, and the bottom end of each spring 10 is connected with the lower clamp plate 12. The upper end face is fixedly connected, the long head bolt 4 is arranged on the upper clamp plate 2 and the top plate 3, and the long head bolt 4 is threadedly connected with the upper clamp plate 2 and the top plate 3, the top of the long head bolt 4 is processed with a rectangular slot, and the cantilever beam 6 is The bottom end is installed in the rectangular slot at the top of the long head bolt 4, the piezoelectric ceramic sheet 7 is pasted on one side of the cantilever beam 6, and the two mass blocks 5 are relatively fixedly installed on the top of the cantilever beam 6 through bolts. The acceleration sensor 11 is pasted on the upper end surface of the lower splint 12 .

Specific embodiment 2: This embodiment is described with reference to FIG. 1 . A piezoelectric energy collector test device based on a self-parameter dynamic vibration absorber described in this embodiment further includes a gasket 8 , and the gasket 8 is close to the cantilever beam 6 Set in the rectangular slot at the top of the long head bolt 4. The cantilever beam 6 is installed in the rectangular groove at the top end of the long head bolt 4 more stably by the washer 8, and other structures and connection relationships are the same as in the first embodiment.

Embodiment 3: This embodiment is described with reference to FIG. 1 and FIG. 2 . A piezoelectric energy collector testing device based on a self-parameter dynamic vibration absorber described in this embodiment is installed at the top and bottom of each spring 10 respectively. There is a circular washer, the circular washer at the top of the spring 10 is installed on the lower end surface of the upper clamp plate 2 , and the circular washer at the bottom end of the spring 10 is installed on the upper end surface of the lower clamp plate 12 . Other structures and connection relationships are the same as in the first embodiment.

Embodiment 4: This embodiment will be described with reference to FIG. 1 . In this embodiment, a piezoelectric energy collector test device based on a self-parameter dynamic vibration absorber is described. The acceleration sensor 11 is pasted on the upper end surface of the lower splint 12 by glue. Other structures and connection relationships are the same as in the first embodiment.

Embodiment 5: This embodiment will be described with reference to FIG. 1 and FIG. 2 . A piezoelectric energy collector testing device based on a self-parameter dynamic vibration absorber described in this embodiment, the upper clamp plate 2 and the top plate 3 are fixedly connected, and the lower clamp plate 12 and the bottom plate 13 are fixedly connected. Other structures and connection relationships are the same as in the first embodiment.

Embodiment 6: This embodiment will be described with reference to FIG. 1. A piezoelectric energy harvester test device based on a self-parameter dynamic vibration absorber described in this embodiment, the cantilever beam 6 and the washer 8 are installed on the long head bolts through pins. 4 On the side wall of the rectangular slot at the top. Other structures and connection relationships are the same as in the first embodiment.

working principle

Install the self-parameter dynamic vibration absorber on the vibration exciter or mechanical equipment that needs to suppress vibration, the basic excitation will drive the up and down vibration of the dynamic vibration absorber, and due to the characteristics of 1:2 internal resonance, this up and down vibration will cause the beam to vibrate. Swing left and right. The piezoelectric ceramic sheet 7 is attached to the cantilever beam 6, and the piezoelectric ceramic sheet 7 will deform during the left and right swinging process. The piezoelectric ceramic sheet 7 has this characteristic. current, so it can be collected and used as electrical energy. Therefore, in the working process, it can not only collect electric energy, but also play the role of suppressing vibration. Part of the vibration mechanical energy is converted into electric energy, and the other part is consumed.

Claims (6)

1. a piezoelectric energy collector testing device based on self-parameter dynamic vibration absorber, is characterized in that: it comprises vibration exciter (1), upper clamp plate (2), top plate (3), long head bolt (4), A cantilever beam (6), a piezoelectric ceramic sheet (7), an acceleration sensor (11), a lower clamping plate (12), a bottom plate (13), two mass blocks (5), a plurality of screws (9) and a plurality of springs ( 10); the lower splint (12) and the bottom plate (13) are installed on the exciter (1) from top to bottom, the upper splint (2) is arranged above the lower splint (12), and the bottom end of the screw (9) is machined with an outer surface. screw thread, the bottom end of each screw rod (9) is threadedly connected with the lower clamp plate (12), the top end of the screw rod (9) is slidably connected with the upper clamp plate (2) and the top plate (3), and each screw rod (9) is sleeved with a A spring (10), the top end of each spring (10) is fixedly connected with the lower end surface of the upper clamp plate (2), the bottom end of each spring (10) is fixedly connected with the upper end surface of the lower clamp plate (12), the long head The bolts (4) are arranged on the upper clamp plate (2) and the top plate (3), and the long head bolts (4) are threadedly connected with the upper clamp plate (2) and the top plate (3). The slot, the bottom end of the cantilever beam (6) is installed in the rectangular slot at the top of the long head bolt (4), the piezoelectric ceramic sheet (7) is pasted on one side of the cantilever beam (6), and the two mass blocks ( 5) It is relatively fixedly installed on the top end of the cantilever beam (6) by means of bolts, and the acceleration sensor (11) is pasted on the upper end surface of the lower clamping plate (12). 2. A piezoelectric energy collector testing device based on self-parameter dynamic vibration absorber according to claim 1, characterized in that: it also comprises a gasket (8), and the gasket (8) is close to the cantilever beam (6) Set in the rectangular slot at the top of the long head bolt (4). 3. a kind of piezoelectric energy collector testing device based on self-parameter dynamic vibration absorber according to claim 1, is characterized in that: the top and bottom end of each spring (10) are respectively provided with a circular washer, the spring (10) 10) The circular washer at the top is installed on the lower end surface of the upper clamp plate (2), and the circular washer at the bottom end of the spring (10) is installed on the upper end surface of the lower clamp plate (12). 4. A piezoelectric energy collector testing device based on a self-parameter dynamic vibration absorber according to claim 1, characterized in that: the acceleration sensor (11) is pasted on the upper end surface of the lower splint (12) by glue. 5. a kind of piezoelectric energy collector testing device based on self-parameter dynamic vibration absorber according to claim 1, is characterized in that: upper splint (2) and top plate (3) are fixedly connected, and lower splint (12) and bottom plate ( 13) Fixed connection. 6. A piezoelectric energy collector testing device based on a self-parameter dynamic vibration absorber according to claim 1, characterized in that: the cantilever beam (6) and the gasket (8) are installed on the long head bolt (4) by a pin On the side wall of the top rectangular slot.

Images