CN112555109B - Energy recovery system based on walking power generation - Google Patents

Energy recovery system based on walking power generation Download PDF

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Publication number
CN112555109B
CN112555109B CN202011262388.4A CN202011262388A CN112555109B CN 112555109 B CN112555109 B CN 112555109B CN 202011262388 A CN202011262388 A CN 202011262388A CN 112555109 B CN112555109 B CN 112555109B
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motor
module
energy storage
bottom plate
walking
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CN112555109A (en
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徐俊
郜浩楠
李士盈
梅雪松
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Xian Jiaotong University
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Xian Jiaotong University
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G5/00—Devices for producing mechanical power from muscle energy
    • F03G5/02—Devices for producing mechanical power from muscle energy of endless-walk type, e.g. treadmills
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
    • H02K7/1807—Rotary generators
    • H02K7/1853—Rotary generators driven by intermittent forces
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rehabilitation Tools (AREA)

Abstract

The invention discloses an energy recovery system based on walking power generation, which realizes continuous electric energy recovery through a mechanical structure and realizes storage and utilization of electric energy through a subsequent control circuit and an energy storage device. The system comprises two one-way rotating mechanisms, a motor and speed change module, a rectification voltage regulation and control module and an energy storage and power supply module. In the walking process, the front single-line rotating mechanism and the rear single-line rotating mechanism can drive the motor to rotate towards the same direction, so that intermittent walking motion is converted into continuous rotating motion of the motor, and electric energy generated by the motor is transmitted to the subsequent rectification voltage regulation and control module. The module converts alternating current transmitted by the motor into direct current through the rectifier bridge, and then the direct current passes through the filter circuit and the buck-boost circuit, the controller controls the buck-boost circuit to enable the direct current output by the controller to supply power to the subsequent energy storage and power supply module, and meanwhile the controller can control the motor to generate proper damping to adapt to the change of gait when a human body walks.

Description

Energy recovery system based on walking power generation
Technical Field
The invention belongs to the field of wearable equipment, and particularly relates to an energy recovery system based on walking power generation.
Background
With the integrated and miniaturized development of the semiconductor technology, the intelligent and flexible breakthrough of the manufacturing industry is made by means of the mobile and comprehensive popularization of the internet, and the intelligent wearable equipment appears in the visual field of people one after another and enters the life of people. The intelligent wearable device not only can help people to perceive the external environment where the intelligent wearable device is located, but also can realize seamless butt joint and communication of man-machine information under the assistance of a computer, the Internet or other sensing devices. In order to realize many functions, the wearable device has a very strict demand for electric energy. Wearable devices are basically designed with low power consumption and equipped with high-performance batteries, but the battery endurance of the wearable devices is still insufficient in some occasions.
In order to solve the problem of continuous power supply of wearable devices, various methods for spontaneously capturing energy from the environment or from the human body, such as solar energy, vibration energy of the environment, thermal energy of the human body, mechanical energy of the human body, and the like, have been studied. The power of solar power generation is very high, which can meet the requirement of power supply for electronic equipment, but it needs a very large area of photovoltaic cells, and the power supply is unstable due to weather; vibration in the environment is everywhere, however, the natural vibration frequency is low and the energy is very weak, so that the output power of the wearable device cannot meet the requirements of the wearable device; although the method for capturing the heat energy of the human body can work all day long, the efficiency is very low, and the obtained power is also difficult to satisfy; the human body is in an active state for a long time in one day, the active human body has a large amount of mechanical energy which is finally dissipated in the form of heat, and the potential energy of human body movement, particularly the potential energy of the human body and the weight center of gravity of the human body moving downwards when the human body walks, has great potential utilization value. Research shows that the energy generated by normal people when walking can reach 67W.
Therefore, mechanical energy is recovered from a human body and converted into electric energy, considerable power can be output, the wearable device can work for a long time, and the wearable device is expected to be a continuous power supply.
Because the piezoelectric material is small in size and easy to integrate at the sole, most walking power generation devices adopt the piezoelectric material to collect walking energy. However, the piezoelectric material has low energy density and limited recovery power, which limits its application. Other walking power generation devices adopt motors to recover energy, and because the gait of a human body is intermittent in the walking process, the electric energy generated by the recovery devices is not continuous.
Disclosure of Invention
The invention aims to solve the problems and provides an energy recovery system based on walking power generation, which recovers, stores and utilizes energy in the walking process.
The invention is realized by adopting the following technical scheme:
an energy recovery system based on walking power generation comprises an energy storage and power supply module, a rectification voltage regulation and control module, a motor and speed change module and a one-way rotating mechanism; the one-way rotating mechanism comprises a supporting plate, a front support, a front bottom plate, a rear support, a rear bottom plate, a V-shaped spring piece, a bearing seat, a clamp spring, a bearing, a first one-way bearing and a second one-way bearing; the energy storage and power supply module and the rectification voltage regulation and control module are fixed at the top of the support plate, a bearing seat and a motor support are installed in the middle of the bottom of the support plate, the motor and the speed change module are fixed on the motor support, one end of a central shaft is installed on the bearing seat through a bearing, the axial displacement of the central shaft is fixed through a clamp spring, the other end of the central shaft is connected with the motor and the speed change module, a first one-way bearing and a second one-way bearing are installed on the central shaft, and the axial movement of the two one-way bearings is limited through a shaft sleeve;
the front support is connected with the outer ring of the second one-way bearing, one end of the front bottom plate is connected with the support plate through a V-shaped spring piece, the other end of the front bottom plate is connected with the front support, the rear support is fixedly connected with the outer ring of the first one-way bearing, one end of the rear bottom plate is connected with the support plate through a V-shaped spring piece (5), and the other end of the rear bottom plate is connected with the rear support;
when the device is used, the unidirectional rotating mechanism converts the intermittent movement of the gait into continuous unidirectional rotating movement, the motor is driven to rotate through the motor and the speed changing module, electric energy is output, the electric energy is transmitted to the rectifying voltage regulating and controlling module through a power line of the motor, and finally the electric energy is transmitted to the energy storage and power supply module to realize power supply.
The invention is further improved in that the first one-way bearing and the second one-way bearing are installed in the same direction.
The invention has the further improvement that one end of the front bottom plate is connected with the supporting plate through three V-shaped spring pieces; one end of the rear bottom plate is connected with the supporting plate through three V-shaped spring pieces.
The invention has the further improvement that the motor and speed changing module comprises a motor and a reduction box; the rectification voltage regulation and control module comprises a rectification bridge, a filter circuit, a buck-boost circuit and a controller; the energy storage and power supply module comprises an energy storage battery, the other end of the central shaft is fixedly connected with one end of the reduction gearbox, the other end of the reduction gearbox is connected with the motor, a power line of the motor is connected with the rectifier bridge, the signal line is connected with the controller, the output end of the rectifier bridge is connected with the input end of the filter circuit, the output end of the filter circuit is connected with the input end of the boost-buck circuit, the output end of the boost-buck circuit is connected with the energy storage battery, and the controller is also connected with the control end of the boost-buck circuit.
The invention has the further improvement that when the rotation of the central shaft passes through the motor and the speed change module, the rotating speed of the central shaft is improved by utilizing the speed increasing effect of the reduction box, so that the subsequent connected motor can generate enough voltage.
The system is further improved in that the support plate is used for standing the human body, and the system can convert the intermittent gait motion of the human body in the walking process into continuous rotating motion so as to drive the central shaft to rotate in the walking process of the human body.
The invention has the further improvement that alternating current output by the motor and the speed changing module is transmitted to the rectification voltage regulating and controlling module, the alternating current transmitted by the motor is converted into direct current through the rectifier bridge by the module, and then the direct current passes through the filter circuit and the voltage boosting and reducing circuit, and the controller controls the voltage boosting and reducing circuit to enable the direct current output by the voltage boosting and reducing circuit to supply power to the subsequent energy storage and power supply module.
The invention is further improved in that the energy storage and supply module stores the direct current delivered by the rectification voltage regulation and control module in a rechargeable battery and supplies power to the wearable device in need.
Compared with the prior art, the invention has at least the following beneficial technical effects:
(1) the invention converts the intermittent motion of the whole gait of a person in the walking process into continuous one-way motion through the front and rear one-way rotating mechanisms, and can effectively improve the energy recovery efficiency, thereby continuously supplying power to wearable equipment and enhancing the cruising ability of the wearable equipment.
(2) The walking power generation system can be matched with the gait motion of a human body during walking through the controller while walking power generation is utilized, so that the wearing is more comfortable.
Drawings
FIG. 1 is a schematic diagram of an energy recovery system based on walking power generation of the present invention;
FIG. 2 is a schematic view of the energy recovery system during travel; wherein FIG. 2(a) is a case where the forefoot lands during walking, and FIG. 2(b) is a case where the heel lands during walking;
FIG. 3 is a schematic diagram of the complete structure of the energy recovery system;
FIG. 4 is a cross-sectional view of the energy recovery system taken along a central axis; wherein FIG. 4(a) is a cross-sectional view of FIG. 4 (b);
FIG. 5 is a schematic view of the energy recovery system without two V-shaped spring strips.
Description of reference numerals: 1 is an energy storage and power supply module; 2 is a rectification voltage regulation and control module; 3 is a supporting plate; 4 is a rear bottom plate; 5 is a V-shaped spring piece; 6 is a rear bracket; 7 is a bearing seat; 8 is a central shaft; 9 is a clamp spring; 10 is a bearing; 11 is a front bracket; 12 is a front bottom plate; 13 is a motor and a speed changing module; 14 is a first one-way bearing; 15 is a shaft sleeve; 16 is a second one-way bearing; and 17 is a motor bracket.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description will be made on the specific implementation, structure and features of an energy recovery system based on walking power generation in accordance with the present invention with reference to the accompanying drawings and examples.
Referring to fig. 1, the energy recovery system based on walking power generation provided by the invention realizes continuous electric energy recovery through a unique mechanical structure, and stores and utilizes the electric energy through a subsequent control circuit and an energy storage device. The invention comprises the following steps: two unidirectional rotating mechanisms, a motor and speed change module 13, a rectification voltage regulation and control module 2 and an energy storage and power supply module 1.
Referring to fig. 2, fig. 2(a) shows the situation that the front toe touches the ground during walking, at this time, the one-way rotating mechanism in front of the system is compressed, and the second one-way bearing 16 works in a locked state, so as to drive the central shaft 8 to rotate clockwise; when the toe is off, the second one-way bearing 16 works in a free state, so that the one-way rotating mechanism does not influence the clockwise rotation of the central shaft 8 when being restored. Fig. 2(b) shows the heel landing condition during walking, the second one-way bearing 16 and the first one-way bearing 14 are installed in the same direction, when the one-way rotation mechanism behind the system is compressed, the first one-way bearing 14 works in a free state and does not affect the clockwise rotation of the central shaft 8, and when the heel leaves, the one-way rotation mechanism is restored, and at this time, the first one-way bearing 14 works in a locked state and drives the central shaft 8 to continue to rotate clockwise. Therefore, the front and the rear one-way rotating mechanisms drive the central shaft 8 to rotate clockwise when working, and the movement is not interfered with each other, so that the energy recovery efficiency during walking is effectively improved.
Referring to fig. 3, 4, and 5, the two unidirectional rotating mechanisms include: the device comprises a supporting plate 3, a rear bottom plate 4, a V-shaped spring piece 5, a rear support 6, a bearing seat 7, a central shaft 8, a clamp spring 9, a bearing 10, a front support 11, a front bottom plate 12, a first one-way bearing 14, a shaft sleeve 15, a second one-way bearing 16 and a motor support 17; the motor and speed changing module 13 comprises a motor and a reduction box; the rectification voltage regulation and control module 2 comprises a rectification bridge, a filter circuit, a boost-buck circuit and a controller; the energy storage and power supply module 1 comprises an energy storage battery and a charging device. The two one-way rotating mechanisms are fixed on the same central shaft 8, the central shaft 8 is fixedly connected with one end of the reduction gearbox, the other end of the reduction gearbox is connected with the motor, a power line of the motor is connected with the rectifier bridge, a signal line is connected with the controller, the output end of the rectifier bridge is connected with the input end of the filter circuit, the output end of the filter circuit is connected with the input end of the boost-buck circuit, the output end of the boost-buck circuit is connected with the energy storage battery, and the controller is also connected with the control end of the boost-buck circuit. When the rotation of the central shaft 8 passes through the motor and the speed change module 13, the rotation speed is increased by using the speed increasing effect of the reduction gearbox, so that the subsequently connected motor can generate enough voltage.
The energy storage and power supply module 1 and the rectification, voltage regulation and control module 2 are fixed on the top of the support plate 3, a bearing seat 7 and a motor support 17 are installed in the middle of the bottom of the support plate 3, a motor and speed change module 13 is fixed on the motor support 17, one end of a central shaft 8 is installed on the bearing seat 7 through a bearing 10 and is fixed in axial displacement through a clamp spring 9, the other end of the central shaft is connected with the motor and speed change module 13, a first one-way bearing 14 and a second one-way bearing 16 are installed on the central shaft 8 and are limited in axial movement through a shaft sleeve 15, the rotation of the inner ring of the central shaft is limited through a flat key, the installation directions of the first one-way bearing 14 and the second one-way bearing 16 are the same, the front support 11 is connected with the outer ring of the second one-way bearing 16, one end of the front bottom plate 12 is connected with the support plate 3 through three V-shaped spring pieces 5, the other end of the front support 11 is connected with the front support 11, therefore in the normal walking process, when the front bottom plate 12 contacts the ground, the front bottom plate is compressed, the second one-way bearing 16 works in a locking state, so that the central shaft 8 is driven to rotate, the motor and the motor in the speed change module 13 are driven to rotate clockwise, the V-shaped spring piece 5 can reset the front bottom plate 12 when the front bottom plate 12 leaves the ground, and the rotation of the central shaft 8 cannot be influenced by the movement of the front bottom plate 12 due to the one-way rotation characteristic of the second one-way bearing 16; same back support 6 links firmly with first one-way bearing 14 outer lane, the one end of back bottom plate 4 is connected with backup pad 3 through three V type spring leaf 5, the other end links firmly with back support 6, in normal walking process, back bottom plate 4 can be compressed when contacting ground, first one-way bearing 14 work is in free state, can not influence the rotation of center pin 8, back bottom plate 4V type spring leaf 5 makes its reset when leaving ground, first one-way bearing 14 work is in the locking state, back bottom plate 4 drives the clockwise rotation of center pin 8 this moment. Human body is at the in-process of normal walking, and the heel lands earlier, and back bottom plate 4 contact ground compressed this moment, and when heel liftoff, back bottom plate 4 reconversion drives the motor clockwise rotation in motor and the variable speed module 13 this moment, and later tiptoe lands, and preceding bottom plate 12 contact ground compressed this moment, continues to drive the motor clockwise rotation in motor and the variable speed module 13.
In the normal walking process of a person, the intermittent motion of a gait is converted into continuous unidirectional rotation motion by the unidirectional rotation mechanism, the motor is driven to rotate by the motor and the speed change module 13, so that the module can output electric energy, the electric energy is transmitted to the rectification voltage regulation and control module 2 through a power line of the motor, alternating current transmitted by the motor is converted into direct current through the rectification bridge by the module, the direct current subsequently passes through the filter circuit and the voltage boosting and reducing circuit, the direct current output by the controller can supply power to the subsequent energy storage and power supply module 1 by controlling the voltage boosting and reducing circuit, and meanwhile, the controller can control the motor to generate proper damping to adapt to the change of the gait when the person walks.

Claims (5)

1. An energy recovery system based on walking power generation is characterized by comprising an energy storage and power supply module (1), a rectification voltage regulation and control module (2), a motor and speed change module (13) and a one-way rotating mechanism; wherein the content of the first and second substances,
the unidirectional rotating mechanism comprises a supporting plate (3), a front support (11), a front bottom plate (12), a rear support (6), a rear bottom plate (4), a V-shaped spring piece (5), a bearing seat (7), a clamp spring (9), a bearing (10), a first unidirectional bearing (14) and a second unidirectional bearing (16); the energy storage and power supply module (1) and the rectification voltage regulation and control module (2) are fixed at the top of the support plate (3), a bearing seat (7) and a motor support (17) are installed at the middle position of the bottom of the support plate (3), the motor and speed change module (13) are fixed on the motor support (17), one end of the central shaft (8) is installed on the bearing seat (7) through a bearing (10) and is fixed in axial displacement by a clamp spring (9), the other end of the central shaft is connected with the motor and speed change module (13), a first one-way bearing (14) and a second one-way bearing (16) are installed on the central shaft (8), and axial movement of the two one-way bearings is limited through a shaft sleeve (15);
the front support (11) is connected with the outer ring of the second one-way bearing (16), one end of the front bottom plate (12) is connected with the support plate (3) through a V-shaped spring piece (5), the other end of the front bottom plate is connected with the front support (11), the rear support (6) is fixedly connected with the outer ring of the first one-way bearing (14), one end of the rear bottom plate (4) is connected with the support plate (3) through the V-shaped spring piece (5), and the other end of the rear bottom plate is connected with the rear support (6);
the motor and speed changing module (13) comprises a motor and a reduction box; the rectification voltage regulation and control module (2) comprises a rectification bridge, a filter circuit, a boost-buck circuit and a controller; the energy storage and power supply module (1) comprises an energy storage battery, the other end of the central shaft (8) is fixedly connected with one end of a reduction gearbox, the other end of the reduction gearbox is connected with a motor, a power line of the motor is connected with a rectifier bridge, a signal line is connected with a controller, the output end of the rectifier bridge is connected with the input end of a filter circuit, the output end of the filter circuit is connected with the input end of a boost-buck circuit, the output end of the boost-buck circuit is connected with the energy storage battery, and the controller is also connected with the control end of the boost-buck circuit;
when the device is used, the unidirectional rotating mechanism converts the intermittent movement of the gait into continuous unidirectional rotating movement, the motor is driven to rotate through the motor and the speed changing module (13), electric energy is output, the electric energy is transmitted to the rectifying, voltage regulating and controlling module (2) through a power line of the motor, and finally transmitted to the energy storage and power supply module (1) to realize power supply;
the support plate (3) is used for standing a human body, and the system can convert the intermittent motion of gait of the human body into continuous rotary motion in the walking process of the human body so as to drive the central shaft (8) to rotate;
alternating current output by the motor and speed change module (13) is transmitted to the rectification voltage regulation and control module (2), the alternating current transmitted by the motor is converted into direct current through the rectifier bridge by the module, the direct current subsequently passes through the filter circuit and the voltage boosting and reducing circuit, and the controller controls the voltage boosting and reducing circuit to enable the direct current output by the controller to supply power to the subsequent energy storage and power supply module (1).
2. The walking-based power generation energy recovery system according to claim 1, wherein the first one-way bearing (14) and the second one-way bearing (16) are installed in the same direction.
3. The energy recovery system based on walking power generation as claimed in claim 1, wherein one end of the front bottom plate (12) is connected with the supporting plate (3) through three V-shaped spring pieces (5); one end of the rear bottom plate (4) is connected with the supporting plate (3) through three V-shaped spring pieces (5).
4. The energy recovery system based on walking power generation as claimed in claim 1, wherein when the rotation at the central shaft (8) passes through the motor and the speed change module (13), the rotation speed is increased by the speed increasing effect of the reduction gearbox, so that the subsequently connected motor can generate enough voltage.
5. A walking power generation based energy recovery system according to claim 1, characterized in that the energy storage and supply module (1) stores the direct current delivered by the rectified voltage regulation and control module (2) in a rechargeable battery and that supplies the needed wearable device.
CN202011262388.4A 2020-11-12 2020-11-12 Energy recovery system based on walking power generation Active CN112555109B (en)

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CN1080700A (en) * 1992-07-01 1994-01-12 邢去非 Two-to-one direction changing rotary gearing device
CN104993566B (en) * 2015-07-02 2017-02-22 北京理工大学 Human body foot mechanical energy generating apparatus
CN106122377B (en) * 2016-06-29 2018-11-27 杨亦勇 A kind of single direction rotation device for realizing big corner high torque
CN107269455B (en) * 2017-07-07 2020-10-30 大连理工大学 Power generation device depending on swing
CN108248320B (en) * 2018-01-19 2023-06-20 西南交通大学 Shock absorber for recovering automobile vibration energy
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