CN113474742A

CN113474742A - Renewable energy collection method and device and controller

Info

Publication number: CN113474742A
Application number: CN201980000876.7A
Authority: CN
Inventors: 宋少丽
Original assignee: Cliff Shenguang Technology Shenzhen Co ltd
Current assignee: Cliff Shenguang Technology Shenzhen Co ltd
Priority date: 2019-06-20
Filing date: 2019-06-20
Publication date: 2021-10-01
Anticipated expiration: 2039-06-20
Also published as: WO2020252723A1; CN113474742B

Abstract

The application is applicable to the technical field of renewable energy sources, and provides a renewable energy source acquisition method, a renewable energy source acquisition device and a controller. The embodiment of the application acquires the weak current signal output by the renewable energy power generation module through the I/O port of the controller, and gathers the weak current signal, when the voltage of the gathered weak current signal is greater than a preset voltage threshold value, the current signal outputting a preset current value is charged for the energy storage module, so that the weak current signal can be effectively acquired, the weak current signal can be directly acquired through the I/O port of the controller, the power consumption is low, and the power consumption can be effectively reduced.

Description

Renewable energy collection method and device and controller

Technical Field

The application belongs to the technical field of renewable energy sources, and particularly relates to a renewable energy source acquisition method, a renewable energy source acquisition device and a controller.

Background

Renewable energy sources such as solar energy, hydroenergy, wind energy, biomass energy, wave energy, tidal energy, ocean temperature difference energy, geothermal energy and the like have the advantages of being rich in resources, clean, environment-friendly and the like, dependence on fossil energy sources such as petroleum and coal can be effectively reduced, and the requirement on sustainable energy sources is met.

Most of the existing renewable energy collecting devices have high requirements on the energy intensity of renewable energy, and when the energy intensity of the renewable energy is weak, the energy collection cannot be carried out, so that the energy collection effect is not ideal.

Content of application

In view of this, embodiments of the present application provide a method, an apparatus, and a controller for collecting renewable energy, which can effectively collect renewable energy with weak energy intensity.

A first aspect of an embodiment of the present application provides a renewable energy collection method, which is executed by a controller, and includes:

weak current signals output by the renewable energy power generation module are collected through an I/O port of the controller; wherein the weak current signal comprises at least one of a millivolt level voltage signal, a nanoamp level current signal, a microamp level current signal and a weak charge signal;

gathering the weak current signals;

detecting whether the voltage of the gathered weak current signal is greater than a preset voltage threshold value;

and when the voltage of the gathered weak current signal is greater than a preset voltage threshold value, outputting a current signal with a preset current value to charge the energy storage module.

A second aspect of the embodiments of the present application provides a controller, which includes a core, an I/O port, a register, a timer, an electric aggregation element, an SPI bus, an analog-to-digital converter, a voltage comparator, a PWM chip, a low voltage detection chip, and a computer program stored in the register, where the steps of the above renewable energy collection method are implemented when the core executes the computer program.

A third aspect of an embodiment of the present application provides a renewable energy collection device, including:

the controller described above; and

and the renewable energy power generation module and the energy storage module are electrically connected with the controller.

In one embodiment, the renewable energy power generation module comprises a weak photovoltaic panel and the energy storage module comprises at least one of a capacitor, a rechargeable battery, a memory metal, a fuel cell, a primary battery, a secondary battery, and a flash battery.

The embodiment of the application acquires the weak current signal output by the renewable energy power generation module through the I/O port of the controller, and gathers the weak current signal, when the voltage of the gathered weak current signal is greater than a preset voltage threshold value, the current signal outputting a preset current value is charged for the energy storage module, so that the weak current signal can be effectively acquired, the weak current signal can be directly acquired through the I/O port of the controller, the power consumption is low, and the power consumption can be effectively reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic flow chart of a renewable energy collection method provided in an embodiment of the present application;

fig. 2 is a schematic flow chart of a renewable energy collection method provided in an embodiment of the present application;

fig. 3 is a schematic flow chart of a renewable energy collection method provided in an embodiment of the present application;

fig. 4 is a schematic flow chart of a renewable energy collection method provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of a controller according to an embodiment of the present application.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "comprises" and "comprising," and any variations thereof, in the description and claims of this application and the drawings described above, are intended to cover non-exclusive inclusions. For example, a process, method, or system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus. Furthermore, the terms "first," "second," and "third," etc. are used to distinguish between different objects and are not used to describe a particular order.

One embodiment of the present application provides a renewable energy harvesting method performed by a controller, which may be a software program method stored inside the controller.

In Application, the controller may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, a discrete hardware component, and the like. The general-purpose processor may be a microprocessor, a Micro Controller Unit (MCU), a Single Chip Microcomputer (Single Chip Microcomputer), or any conventional processor.

As shown in fig. 1, a renewable energy collection method provided by an embodiment of the present application includes:

s101, acquiring a weak current signal output by a renewable energy power generation module through an I/O port of the controller; wherein the weak current signal comprises at least one of a millivolt level voltage signal, a nanoamp level current signal, a microamp level current signal and a weak charge signal.

In application, the controller is provided with at least one I/O port for connecting with at least one renewable energy power generation module, and each I/O port is correspondingly connected with one renewable energy power generation module so as to directly acquire weak current signals output by the renewable energy power generation modules through the I/O ports. The I/O port may be a GPIO (General-purpose input/output) port.

In application, the renewable energy power generation module comprises at least one of a solar power generation module, a water energy module, a wind energy module, a biomass energy module, a wave energy module, a tidal energy module, an ocean thermal energy module and a geothermal energy module.

In application, the solar power generation module may be a weak photovoltaic panel or a photosensitive element. The solar power generation module can convert an optical signal into an electrical signal in a low light environment, and the light intensity range of the optical signal in the low light environment can be set to [5lux, 50lux ]. The weak photovoltaic panel may be a silicon solar cell (e.g., amorphous silicon solar cell, monocrystalline silicon solar cell, polycrystalline silicon solar cell, etc.), a compound cell (e.g., gallium arsenide solar cell, cadmium telluride solar cell, etc.), a thin film solar cell (e.g., copper indium selenide thin film cell, copper zinc tin sulfide thin film solar cell, etc.), a fuel-sensitized solar cell, an organic solar cell, a perovskite solar cell, a graphene solar cell, a quantum dot solar cell, etc. The photosensitive element may be a photodiode, a phototransistor, or the like.

In one embodiment, the renewable energy power generation module comprises a weak photovoltaic panel.

As shown in fig. 2, in one embodiment, after step S101, the method includes:

step S201, a register and a timer of the controller are powered on and reset according to the weak current signal, and a system clock and user data are initialized to wake up the controller; the system clock is used for starting timing after initialization, and the user data comprises the preset voltage threshold value and the preset current value;

and S202, after waking up the controller, entering a sleep state.

In application, after an I/O port of a controller collects weak current signals, the controller is triggered to wake up once for a short time through the weak current signals, a register and a timer of the controller are reset, a system clock and user data are initialized, the system clock starts timing and the user data are loaded, subsequent steps can be normally carried out, after the controller is wakened up for a short time, the controller enters a dormant state again, power consumption is reduced, and more weak current signals are gathered to the maximum extent to charge an energy storage module.

As shown in fig. 3, in one embodiment, step S201 includes:

step S301, a register and a timer of the controller are powered on and reset according to the weak current signal;

step S302, defining a stack domain;

step S303, initializing an interrupt vector table;

step S304, initializing a system clock;

step S305, calling an entry function;

step S306, initializing an I/O port, an SPI bus, an analog-to-digital converter, a voltage comparator and user data of the controller; wherein the user data further comprises low voltage detection data.

In application, steps S301 to S305 are starting steps of a software program system solidified in an internal memory space of the controller, the software program system may be written in an assembly language, and the entry function includes a main function; calling a main function, namely starting to execute a system program, entering step S306, initializing each hardware and software data in the controller, providing a low voltage detection interrupt function by a low voltage detection chip in the controller, and detecting the voltage value and the electric quantity of the renewable energy power generation module or the energy storage module so as to obtain low voltage detection data.

And step S102, gathering the weak current signals.

In application, an electric aggregation element for aggregating weak electric signals is integrally arranged inside the controller, and the electric aggregation element comprises a MOS (metal oxide semiconductor) tube, a Charge storage diode, a capacitor, a Charge-coupled Device (CCD) and the like.

In one embodiment, step S102 includes:

the weak current signal is gathered by an electric gathering element of the controller.

And step S103, detecting whether the voltage of the gathered weak current signal is greater than a preset voltage threshold value.

In application, the voltage of the gathered weak current signal can be sampled by an analog-to-digital converter inside the controller, and then the voltage of the gathered weak current signal is compared with the preset voltage threshold value by a voltage comparator inside the controller to detect whether the voltage of the gathered weak current signal is greater than the preset voltage threshold value. The preset voltage threshold can be set to a voltage value capable of providing stable charging voltage and current for the energy storage module according to actual needs.

As shown in fig. 4, in the present embodiment, step S103 includes:

step S401, detecting the voltage of the gathered weak current signal;

step S402, acquiring the voltage rising speed of the gathered weak current signal according to the voltage of the weak current signal;

step S403, inquiring the generated power associated with the voltage rising speed in a preset inquiry table;

and S404, tracking the generated power according to an MPPT algorithm, and judging that the voltage of the gathered weak current signal is greater than a preset voltage threshold when the generated power is greater than a preset power threshold.

In application, the voltage rising speed of the gathered weak current signal in each preset time period can be calculated according to the voltage of the gathered weak current signal sampled by the analog-to-digital converter in each preset time period, wherein the voltage rising speed is (the voltage of the gathered weak current signal at the starting time of the preset time period-the voltage of the gathered weak current signal at the ending time of the preset time period)/the duration of the preset time period; the voltage variation curve of the gathered weak current signals along with time can be obtained according to a curve fitting method, the slope of the curve is calculated, the slope of the curve is in direct proportion to the voltage rising speed of the gathered weak current signals, and the voltage rising speed is in direct proportion to the generated power. The preset time period may be a unit time period, for example, 1 second, 1 minute, 1 hour, etc.

In application, the preset lookup table is used for recording the incidence relation between the voltage rising speed of the weak current signal and the power generation power of the renewable energy power generation module, and the incidence relation can be a mapping relation; the preset lookup Table may be a Look-Up-Table (LUT), or may be implemented by other devices or programs that have the same input voltage rising speed as the LUT, i.e., can output the generated power.

In application, the inquired generated Power can be tracked through an MPPT (Maximum Power Point Tracking) algorithm, and when the generated Power is greater than a preset Power threshold, it is determined that the voltage of the gathered weak current signal is greater than a preset voltage threshold. The preset power threshold value can be set according to actual needs. The MPPT algorithm tracks the power generation power in real time, and the energy storage module can be charged after the power generation voltage and current of the renewable energy power generation module reach appropriate values.

And step S104, when the voltage of the gathered weak current signal is greater than a preset voltage threshold value, outputting a current signal with a preset current value to charge the energy storage module.

In application, the energy storage module is charged by outputting a current signal with a preset current value, so that the charging stability and efficiency can be improved, the charging safety is ensured, and the service life of the energy storage module is prolonged.

In one embodiment, the energy storage module comprises at least one of a capacitor, a rechargeable battery, a memory metal, a fuel cell, a primary battery, a secondary battery, and a flash battery.

In application, the energy storage module may include at least one of a capacitor (e.g., a capacitor, a farad capacitor, a ceramic capacitor, etc.), a rechargeable battery (e.g., a nickel-metal hydride battery, a lithium battery, etc.), a memory metal, a fuel cell, a primary battery, a secondary battery, a flash battery, etc., which may be selected according to a required storage capacity. When the energy storage module comprises two or more batteries, the priority for charging the batteries can be set according to the voltage rising speed or the generated power, for example, when the voltage rising speed is greater than the preset speed or the generated power is greater than the preset power, the priority for setting the battery with large storage capacity is higher than the priority for setting the battery with small storage capacity, namely, the battery with large storage capacity is charged preferentially; conversely, a battery with a small storage capacity is set to have a higher priority than a battery with a large storage capacity, that is, a battery with a small storage capacity is charged with priority. The preset speed and the preset power can be set according to actual needs, and the preset power is larger than a preset power threshold.

In one embodiment, step S104 includes:

when the voltage of the gathered weak current signal is larger than a preset voltage threshold value, a PWM chip of the controller is awakened, and the gathered weak current signal is converted into a current signal with a preset current value through the PWM chip to charge the energy storage module.

In application, according to the voltage of the gathered weak current signal, a Pulse Width Modulation (PWM) chip is interrupted by a timer to charge the energy storage module, and the PWM chip converts the voltage waveform and the current waveform of the gathered weak current signal into a waveform suitable for charging the energy storage module to charge the energy storage module.

In one embodiment, the renewable energy harvesting method further comprises:

awakening the system when receiving an external interrupt signal or a low voltage signal, and entering a working state;

the external interrupt signal comprises a light synchronization signal or a low-illumination signal, the light synchronization signal and the low-illumination signal are used for triggering the controller to control the energy storage module to output a voltage signal with a preset voltage value to supply power to a light-emitting load, and the low-voltage signal is sent by a low-voltage detection chip of the controller.

In application, the light-emitting load can be a street lamp, an indoor illuminating lamp, a landscape lamp, a billboard lamp box and other lamps, and the light synchronization signal can be sent out by other light-emitting devices except the light-emitting load and is used for enabling the light-emitting load and the other light-emitting devices to synchronously emit light or twinkle. The low illumination signal can be sent out by an illuminometer or a light sensor when detecting that the ambient light illumination is lower than a preset illumination threshold value, and is used for enabling the luminous load to emit light or flicker, and the illuminometer or the light sensor is connected with the controller. The preset illumination threshold may be set according to actual needs, for example, 0lux to 100 lux. The low light level signal can be sent out by a system clock or a timer in the evening time period, and the evening time period can be set according to actual needs, for example, 18: 00-6: 00.

In application, the low voltage detection chip is used for detecting the voltage and the electric quantity of the energy storage module, and when the voltage or the electric quantity of the energy storage module reaches a certain degree (for example, when the voltage is greater than or equal to 80% of the rated voltage of the energy storage module, and the electric quantity is greater than or equal to 80% of the capacity of the energy storage module), the low voltage detection chip outputs a low voltage signal to wake up the controller, so that the controller enters a working state to supply power to the load. The load can be any load with rated working voltage in the output voltage range of the energy storage module, for example, a bright candle lamp, an automatic garbage bin motor, a door lock motor, a motor of a wireless communication module (for example, a Bluetooth module, a WiFi module, an infrared module and the like) intelligent door lock, a human body sensor, a smoke sensor and the like.

It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

As shown in fig. 5, an embodiment of the present application provides a controller 100, which includes a core 1, an I/O port 2, a register 3, a timer 4, an electrical aggregation element 5, an SPI bus 6, an analog-to-digital converter 7, a voltage comparator 8, a PWM chip 9, a low voltage detection chip 10, and a computer program 11, such as a renewable energy harvesting program, stored in the register 3 and operable on the core 1. The steps in the above embodiments of the renewable energy collection method, such as steps S101 to S104 shown in fig. 1, are implemented when the kernel 1 executes the computer program 11.

Illustratively, a computer program may be partitioned into one or more modules/units, which are stored in memory and executed by a kernel to complete the present application. One or more of the modules/units may be a series of computer program instruction segments capable of performing certain functions and describing the execution of the computer program in the controller. For example, the computer program may be divided into an acquisition module, an aggregation module, a detection module, and a charging module, each module having the following specific functions:

the acquisition module is used for acquiring weak current signals output by the renewable energy power generation module through an I/O port of the controller; wherein the weak current signal comprises at least one of a millivolt level voltage signal, a nanoamp level current signal, a microamp level current signal and a weak charge signal;

the aggregation module is used for aggregating the weak current signals;

the detection module is used for detecting whether the voltage of the gathered weak current signal is greater than a preset voltage threshold value or not;

and the charging module is used for outputting a current signal with a preset current value to charge the energy storage module when the voltage of the gathered weak current signal is greater than a preset voltage threshold value.

In one embodiment, the computer program may also be partitioned into the following modules:

the wake-up module is used for powering on and resetting a register and a timer of the controller according to the weak current signal, and initializing a system clock and user data so as to wake up the controller; the system clock is used for starting timing after initialization, and the user data comprises the preset voltage threshold value and the preset current value;

and the dormancy module is used for entering a dormancy state after waking up the controller.

In one embodiment, the wake-up module is further configured to wake up the system to enter the operating state when receiving an external interrupt signal or a low voltage signal.

In application, the controller may include, but is not limited to, the above-described devices. Those skilled in the art will appreciate that fig. 5 is merely an example of a controller and is not intended to be limiting and may include more or fewer components than shown, or some components may be combined, or different components, e.g., the controller may also include a system bus, a bus bridge, a voltage regulator circuit or chip, etc.

An embodiment of the present application also provides a renewable energy collection apparatus, including the controller; and

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules, so as to perform all or part of the functions described above. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus/controller and method may be implemented in other ways. For example, the above-described apparatus/controller embodiments are merely illustrative, and for example, a division of modules or units is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method of the embodiments described above can be realized by a computer program, which can be stored in a computer-readable storage medium and can realize the steps of the embodiments of the methods described above when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims

1. A renewable energy harvesting method, performed by a controller, the renewable energy harvesting method comprising:

gathering the weak current signals;

2. The method for renewable energy harvesting of claim 1, after acquiring the weak current signal via the I/O port of the controller, further comprising:

according to the weak current signal, a register and a timer of the controller are powered on and reset, and a system clock and user data are initialized to wake up the controller; the system clock is used for starting timing after initialization, and the user data comprises the preset voltage threshold value and the preset current value;

and after waking up the controller, entering a dormant state.

3. The renewable energy harvesting method of claim 2, wherein power-up resetting registers and timers of the controller, initializing a system clock, and user data based on the weak current signal to wake up the controller, comprising:

the register and the timer of the controller are powered on and reset according to the weak current signal;

defining a stack domain;

initializing an interrupt vector table;

initializing a system clock;

calling an entry function;

initializing an I/O port, an SPI bus, an analog-to-digital converter, a voltage comparator, a low-voltage detection chip and user data of the controller; wherein the user data further comprises low voltage detection data.

4. The renewable energy harvesting method of claim 1, wherein aggregating the weak electrical signals comprises:

5. The renewable energy harvesting method of claim 1, wherein the electric concentrating element comprises at least one of a MOS transistor, a charge storage diode, a capacitor, and an electric coupling element.

6. The renewable energy harvesting method of claim 1, wherein detecting whether the voltage of the weak electrical signal that has been aggregated is greater than a preset voltage threshold comprises:

detecting the voltage of the weak electric signal which is gathered;

acquiring the voltage rising speed of the gathered weak current signal according to the voltage of the weak current signal;

inquiring the generated power associated with the voltage rising speed in a preset inquiry table;

tracking the generated power according to an MPPT algorithm, and judging that the voltage of the gathered weak current signal is greater than a preset voltage threshold when the generated power is greater than a preset power threshold.

7. The method for collecting renewable energy according to claim 6, wherein when the voltage of the collected weak current signal is greater than a preset voltage threshold, outputting a current signal with a preset current value to charge the energy storage module, comprising:

8. The renewable energy harvesting method of any one of claims 1 to 7, further comprising:

9. A controller comprising a core, I/O ports, registers, timers, electro-aggregation elements, SPI bus, analog-to-digital converters, voltage comparators, PWM chip and low voltage detection chip and computer programs stored in said registers, said core implementing the steps of the renewable energy harvesting method according to any one of claims 1 to 8 when executing said computer programs.

10. A renewable energy collection device, comprising:

the controller of claim 9; and

11. The renewable energy harvesting device of claim 10, wherein the renewable energy generation module comprises a weak photovoltaic panel and the energy storage module comprises at least one of a capacitor, a rechargeable battery, a memory metal, a fuel cell, a primary battery, a secondary battery, and a flash battery.