Self-energized temperature-measuring notebook cooler

Abstract

The utility model provides a self-powered temperature-measuring notebook cooler, which comprises an annular base, a temperature sensor and a fan, an external magnet is arranged at the top end of a fan blade of the fan, and at least one group of piezoelectric devices for supplying energy to the temperature sensor is arranged on the inner side of the annular base; the piezoelectric device comprises a retainer mounting base, a cantilever beam is arranged on the retainer mounting base, piezoelectric patches are arranged on the two sides of the root of the cantilever beam respectively, tip magnets are arranged on the two sides of the top of the cantilever beam respectively, and the tip magnets are used for magnetically attracting external magnets to cause vibration of the cantilever beam; vertical plates are arranged at the two ends of the retainer mounting seat, and retainers used for limiting the swing amplitude of the cantilever beam are arranged on the vertical plates respectively. When the device is used for piezoelectric vibration energy recovery, the energy-obtaining cantilever beam can work at a low but wide frequency bandwidth, fatigue damage is reduced, the durability of the self-energy-obtaining temperature measurement assembly of the notebook computer radiator is improved, and meanwhile it is ensured that output energy can meet the requirement for work of a temperature sensor.

Description

Technical Field

[0001] The utility model relates to the field of self-powered equipment, in particular to a self-powered temperature measuring notebook radiator. Background Art

[0002] With the development of society, laptops are gradually becoming thinner and lighter, which leads to heating and temperature rise during the operation of the equipment, and the temperature needs to be monitored at all times. However, traditional temperature detection equipment requires additional power supply circuits and data transmission circuits, which is not conducive to thinness. At present, obtaining energy from the surrounding environment has gradually developed into a new technical idea. Among them, vibration energy is widely present in industrial sites and surrounding environments. Recovering energy from the vibration environment and directly converting it into power supply for low-power microelectronic components has great application potential. The vibration structures commonly used in piezoelectric vibration energy recovery devices are cantilever beam structure, circular structure, cymbal structure and other forms. Among them, the traditional cantilever beam structure is the most commonly used form, with a simple structure and easy to implement. However, the existing piezoelectric vibration energy recovery is mostly a fixed frequency working mode, that is, the piezoelectric energy recovery device can only work within a narrow single frequency range, and the frequency of the vibration source in the environment may fluctuate at any time within a certain range, or there are multiple vibration frequencies. At this time, if the resonant frequency of the recovery device cannot match the frequency of the environmental vibration source well, the recovered energy will be greatly reduced, and the overall output power will also decrease sharply, making it difficult to ensure the normal operation of microelectronic devices such as wireless temperature measurement devices.

[0003] In order to stably power the wireless temperature measuring device in a wider vibration frequency range, the invention patent with the authorization announcement number CN106385198B discloses an S-shaped piezoelectric cantilever beam self-powered wireless temperature measuring device for measuring ambient temperature. The device includes a piezoelectric self-powered module, in which the S-shaped piezoelectric cantilever beam converts the mechanical energy of ambient vibration into electrical energy using the piezoelectric effect, and the energy collection management circuit and the energy storage device are suitable for transforming and storing the electrical energy generated by the S-shaped piezoelectric cantilever beam; a temperature measurement module suitable for measuring ambient temperature; a main control module for controlling the piezoelectric self-powered module to power other modules, control the operation of the wireless communication module and the temperature measurement module; the wireless communication module sends the temperature measurement result to the external platform according to the control signal received from the external platform, and the display module is used to display the debugging and operation status of the device. Although the device can stably power the wireless temperature measuring device in a wider vibration frequency range, the device will suffer from fatigue damage prematurely due to long-term unconstrained vibration, and the durability is low. Utility Model Content

[0004] In order to enable the energy-harvesting cantilever beam to work at a lower but wider frequency bandwidth during piezoelectric vibration energy recovery, reduce fatigue damage, improve the durability of the self-energy-harvesting temperature measurement component of the notebook radiator, and ensure that the output energy can meet the work of the temperature sensor, the technical solution adopted by the utility model is: a self-powered temperature measurement notebook radiator, including an annular base, a temperature sensor and a fan, the top of the fan blade is provided with an external magnet, and the inner side of the annular base is provided with at least one group of piezoelectric devices for supplying energy to the temperature sensor;

[0005] The piezoelectric device comprises a stopper mounting seat, a cantilever beam is arranged on the stopper mounting seat, piezoelectric sheets are arranged on both sides of the root of the cantilever beam, and tip magnets are arranged on both sides of the top of the cantilever beam, and the tip magnets are used to attract the external magnet with magnetic force to cause the cantilever beam to vibrate;

[0006] Vertical plates are arranged at both ends of the stopper mounting seat, and stoppers for limiting the swing amplitude of the cantilever beam are respectively arranged on the vertical plates.

[0007] Based on the above, in order to be able to adjust the vibration amplitude of the cantilever beam, the number of the external magnets and the number of the tip magnets are adjustable.

[0008] Based on the above, in order to adjust the vibration amplitude of the cantilever beam and ensure that the piezoelectric sheet does not exceed the strain limit, the distance between the stopper and the cantilever beam is adjustable.

[0009] Based on the above, the position where the stopper is installed on the vertical plate is adjustable.

[0010] Based on the above, in order to symmetrically limit the vibration amplitude of the cantilever beam, a pair of the stoppers are symmetrically arranged with the center line of the cantilever beam as the symmetry axis.

[0011] Based on the above, in order to continuously vibrate the cantilever beam, the tip magnet is respectively disposed on the blade of each fan.

[0012] Based on the above, in order to ensure that the piezoelectric sheet can continuously generate electricity, a plurality of groups of piezoelectric devices are arranged on the inner side of the annular base, and a circular array of the plurality of piezoelectric devices is arranged on the inner side of the annular base.

[0013] Based on the above, in order to facilitate limiting the vibration amplitude of the cantilever beam, the stopper is a mallet-shaped structural member with one end thick and the other end thin, and the thin end of the stopper is arranged on the inner side of the vertical plate.

[0014] Based on the above, in order to reduce wiring, the temperature sensor is connected to a wireless communication module.

[0015] Based on the above, the piezoelectric patch is a flexible macro-fiber composite material MFC patch.

[0016] Specifically, the energy source of the cantilever beam vibration is that the fan blades are fixed with an external magnet, and the cantilever beam is fixed with a tip magnet. During the rotation of the fan, the external magnet and the tip magnet attract each other, thereby causing the cantilever beam to vibrate.

[0017] The stopper is made of steel. The stopper is fixed on both sides of the cantilever beam. When the working amplitude of the cantilever beam exceeds the design amplitude, the cantilever beam will contact the stopper and reach the design amplitude.

[0018] At the same time, the device can broaden the effective frequency band of the vibration energy capture system by adjusting the size of the magnetic force and the position of the stop block. Specifically, when the vibration amplitude of the cantilever beam is large, the number of magnets is reduced to reduce the magnetic force, and when the vibration amplitude of the cantilever beam is small, the number of magnets is increased to increase the magnetic force. Changing the position of the stopper is to adjust the position of the stopper according to the actual speed of the fan. When the fan speed is too fast, the stopper is moved forward to reduce the effective length of the cantilever beam. When the fan speed is too low, the stopper is moved backward to increase the effective length of the cantilever beam, so that the device can work as much as possible in the designed state.

[0019] Specifically, the device's energy acquisition and data transmission process is that when the MFC patch is deformed by external force, a charge voltage is generated inside the piezoelectric patch, which is AC, and is rectified into DC through a rectifier bridge, and then output to the temperature sensor to power it. The temperature sensor returns the measured data to the display end via WIFI, thereby realizing the self-energy acquisition temperature measurement of the temperature sensor.

[0020] The utility model has substantial features and progress compared to the prior art. Specifically, the self-powered temperature measuring notebook radiator provided by the utility model can capture energy from the rotation of the fan, realize the energy self-supply of the temperature sensor, reduce their dependence on batteries or power supplies, reduce the energy consumption of the sensor, avoid the temperature sensor being restricted by external energy and wiring, and take advantage of the trend of thin and light notebooks. At the same time, by utilizing the mutual attraction between the external magnet and the tip magnet during the rotation of the fan to cause the cantilever beam to vibrate, and fixing the stopper on both sides of the cantilever beam, when the working amplitude of the cantilever beam exceeds the design amplitude, the cantilever beam will contact the stopper and reach the design amplitude, thereby ensuring that when performing piezoelectric vibration energy recovery, the energy-harvesting cantilever beam can work at a lower but wider frequency bandwidth, reducing fatigue damage, and improving the durability of the self-powered temperature measuring component of the notebook radiator, while ensuring that the output energy can meet the temperature sensor operation.

[0021] Furthermore, the device can be developed for self-powered monitoring of bearing-type machinery, and can power sensors for bearing health monitoring, thus promoting the intelligent development of bearings.

[0022] Furthermore, the device can also reduce the dependence of wireless sensors on traditional batteries and reduce harm to the environment. It belongs to the field of green energy and has great environmental benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The utility model is a schematic diagram of a notebook radiator fan structure with self-energy supply and temperature measurement.

[0024] Figure 2 The utility model is a schematic diagram of the structure of a piezoelectric device in a notebook radiator with self-power supply and temperature measurement.

[0025] Figure 3 The utility model is a schematic diagram of the structure of a stop mechanism in a notebook radiator with self-energy supply and temperature measurement.

[0026] Figure 4 The utility model is a schematic diagram of a piezoelectric sheet and a cantilever beam structure in a notebook radiator with self-powered temperature measurement.

[0027] Figure 5 The utility model provides a simplified circuit diagram of a notebook radiator with self-power supply and temperature measurement.

[0028] Figure 6 The utility model is a schematic diagram of the effective length of a cantilever beam in a notebook radiator with self-power supply and temperature measurement.

[0029] In the figure: 1. annular base; 2. fan blades; 3. external magnet; 4. stopping mechanism; 5. piezoelectric sheet; 6. cantilever beam; 7. tip magnet; 8. fan; 9. stopper mounting seat; 10. vertical plate; 11. stopper; 12. swing channel. DETAILED DESCRIPTION

[0030] The technical solution of the utility model is further described in detail below through specific implementation methods.

[0031] Example 1

[0032] This embodiment provides a notebook radiator with self-powered temperature measurement, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, it comprises an annular base 1, a temperature sensor and a fan 8. An external magnet 3 is arranged at the top of the blade 2 of the fan 8. At least one group of piezoelectric devices for supplying energy to the temperature sensor is arranged on the inner side of the annular base 1.

[0033] Specifically, Figure 2 and Figure 3As shown, the piezoelectric device includes a stopper mounting seat 9, on which a cantilever beam 6 is arranged. Piezoelectric sheets 5 are respectively arranged on both sides of the root of the cantilever beam 6, and tip magnets 7 are respectively arranged on both sides of the top of the cantilever beam 6. The tip magnets 7 are used to magnetically attract the external magnet 3 to cause the cantilever beam 6 to vibrate. Vertical plates 10 are arranged at both ends of the stopper mounting seat 9, and stoppers 11 for limiting the swing amplitude of the cantilever beam 6 are respectively arranged on the vertical plates 10. The space between a pair of the stoppers 11 forms a swing channel 12 for the cantilever beam to swing.

[0034] In this embodiment, in order to adjust the vibration amplitude of the cantilever beam, the number of the external magnets and the number of the tip magnets are adjustable. In order to adjust the vibration amplitude of the cantilever beam and ensure that the piezoelectric sheet does not exceed the strain limit, the distance between the stopper and the cantilever beam is adjustable. The position where the stopper is installed on the vertical plate is adjustable.

[0035] like Figure 4 As shown, in this embodiment, the piezoelectric sheet 5 is a flexible macro-fiber composite material MFC patch. The external magnet and the tip magnet are commonly used magnets.

[0036] Specifically, the working principle of the device is: the nonlinear stiffness caused by magnetic force, beam end displacement and substrate excitation during vibration energy capture. The external magnet and the tip magnet are arranged in a way that the interaction leads to lateral attraction, which reduces the equivalent bending stiffness of the beam and thus reduces the resonant frequency.

[0037] Specifically, Figure 6 As shown, when the cantilever beam engages the stopper, the effective length of the cantilever beam changes from L to L-L0, resulting in an increase in the equivalent stiffness and shifting the resonance to a higher frequency.

[0038] These two mechanisms enable the system to operate at a lower but wider frequency bandwidth. By adjusting the magnetic force and the position of the stopper, it can adapt to environmental vibrations of different frequencies. Figure 5 As shown in the figure, when subjected to vibration, the dynamic strain in the MFC patch will generate voltage in the external resistor, which is AC, and then rectified into DC by the rectifier bridge, and then output to the temperature sensor to power it. The temperature sensor returns the measured data to the display end via WIFI, thus realizing the self-energy temperature measurement of the temperature sensor.

[0039] Example 2

[0040] This embodiment provides a self-powered temperature measuring notebook radiator, which is different from Embodiment 1 in that, in this embodiment: in order to symmetrically limit the vibration amplitude of the cantilever beam, a pair of the stoppers are symmetrically arranged with the center line of the cantilever beam as the symmetry axis.

[0041] Example 3

[0042] This embodiment provides a self-powered temperature measuring notebook radiator, which is different from the first or second embodiment in that in this embodiment: in order to continuously vibrate the cantilever beam, each fan blade is provided with the tip magnet. In order to ensure that the piezoelectric sheet continuously obtains energy to generate electricity, multiple groups of piezoelectric devices are provided on the inner side of the annular base, and the multiple groups of piezoelectric devices are arranged in a circular array on the inner side of the annular base.

[0043] Example 4

[0044] This embodiment provides a self-powered temperature measuring notebook radiator, which differs from Embodiment 1 in that, in this embodiment: in order to facilitate limiting the vibration amplitude of the cantilever beam, the stopper is a mallet-shaped structural member with one end thick and the other end thin, and the thin end of the stopper is arranged on the inner side of the vertical plate.

[0045] Example 5

[0046] This embodiment provides a notebook radiator with self-powered temperature measurement, which is different from the first embodiment in that in this embodiment: in order to reduce wiring, the temperature sensor is connected to a wireless communication module. The wireless communication module is a commonly used wireless communication module. The temperature sensor is a commonly used temperature sensor.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for protection of the utility model.

Claims

1. A notebook radiator with self-powered temperature measurement, characterized in that: It comprises an annular base, a temperature sensor and a fan, wherein the top of the fan blade is provided with an external magnet, and the inner side of the annular base is provided with at least one group of piezoelectric devices for supplying energy to the temperature sensor; The piezoelectric device comprises a stopper mounting seat, a cantilever beam is arranged on the stopper mounting seat, piezoelectric sheets are arranged on both sides of the root of the cantilever beam, and tip magnets are arranged on both sides of the top of the cantilever beam, and the tip magnets are used to attract the external magnet with magnetic force to cause the cantilever beam to vibrate; Vertical plates are arranged at both ends of the stopper mounting seat, and stoppers for limiting the swing amplitude of the cantilever beam are respectively arranged on the vertical plates.

2. A self-powered temperature measuring notebook radiator according to claim 1, characterized in that: The number of the external magnets and the number of the tip magnets are adjustable.

3. A self-powered temperature measuring notebook radiator according to claim 1 or 2, characterized in that: The distance between the stopper and the cantilever beam is adjustable.

4. The self-powered temperature measuring notebook radiator according to claim 1, characterized in that: The position where the stopper is mounted on the vertical plate is adjustable.

5. A self-powered temperature measuring notebook radiator according to claim 1, 2 or 4, characterized in that: A pair of the stoppers are symmetrically arranged with the center line of the cantilever beam as a symmetry axis.

6. A self-powered temperature measuring notebook radiator according to claim 5, characterized in that: The tip magnet is respectively arranged on the blade of each fan.

7. A self-powered temperature measuring notebook radiator according to claim 2 or 4, characterized in that: A plurality of groups of piezoelectric devices are arranged on the inner side of the annular base, and a circular array of the plurality of groups of piezoelectric devices is arranged on the inner side of the annular base.

8. The self-powered temperature measuring notebook radiator according to claim 7, characterized in that: The stopper is a mallet-shaped structural member with one end being thick and the other end being thin, and the thin end of the stopper is arranged on the inner side of the vertical plate.

9. The self-powered temperature measuring notebook radiator according to claim 1, characterized in that: The temperature sensor is connected with a wireless communication module.

10. A self-powered temperature measuring notebook radiator according to claim 1 or 2 or 4 or 9, characterized in that: The piezoelectric patch is a flexible macro-fiber composite material MFC patch.

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