Environmental energy collection system and method, electronic equipment and medium

Abstract

The invention provides an environment energy collection system and method, electronic equipment and a medium. According to the environment energy collecting system, a direct current environment energy collector is electrically connected with an energy collecting channel circuit and used for converting collected direct current environment energy into first direct current voltage and providing the first direct current voltage for the energy collecting channel circuit; the alternating-current environment energy collector is electrically connected with the energy collection channel circuit and is used for converting the collected alternating-current environment energy into second direct-current voltage and providing the second direct-current voltage for the energy collection channel circuit; the controller is used for determining the working mode of the energy collection channel circuit according to the first direct-current voltage and the second direct-current voltage and determining the target voltage output by the energy collection channel circuit according to the working voltage of the load; the energy collection channel circuit is used for switching to a working mode and outputting a target voltage when receiving the control signal, and the target voltage is greater than or equal to the working voltage of the load. According to the embodiment, the environment energy collecting capacity can be improved, and energy is stably and reliably supplied to the load.

Description

Technical Field

[0001] This disclosure relates to the field of energy harvesting technology, and more particularly to an energy harvesting system, method, electronic device, and medium. Background Technology

[0002] Energy harvesting technology refers to the technology of collecting energy in different physical forms from the natural environment through energy harvesters and converting it into electrical energy for storage, management and use.

[0003] Energy harvesting technology can be applied to widely distributed IoT devices, providing power for low-power IoT devices. Currently, this technology is widely used in railway monitoring, wearable devices, factory monitoring, and other applications.

[0004] However, existing environmental energy harvesting equipment has low output power and intermittent energy supply, making it unable to provide stable and reliable power for IoT devices. Summary of the Invention

[0005] This disclosure provides an environmental energy harvesting system, method, electronic device, and medium to solve the aforementioned technical problems.

[0006] According to a first aspect of this disclosure, an environmental energy harvesting system is provided, comprising: a DC environmental energy harvester, an AC environmental energy harvester, an energy harvesting channel circuit, and a controller;

[0007] The DC ambient energy harvester is electrically connected to the energy harvesting channel circuit and is used to convert the harvested DC ambient energy into a first DC voltage and provide it to the energy harvesting channel circuit.

[0008] The AC ambient energy harvester is electrically connected to the energy harvesting channel circuit and is used to convert the harvested AC ambient energy into a second DC voltage and supply it to the energy harvesting channel circuit.

[0009] The controller is used to determine the operating mode of the energy harvesting channel circuit based on the first DC voltage and the second DC voltage, and to determine the target voltage output by the energy harvesting channel circuit based on the operating voltage of the load.

[0010] The energy harvesting channel circuit is used to switch to the operating mode and output the target voltage when a control signal is received, the target voltage being greater than or equal to the operating voltage of the load.

[0011] Optionally, the DC ambient energy harvester is used to harvest light energy or thermoelectric energy; the AC ambient energy harvester is used to harvest vibration energy or radio frequency energy.

[0012] Optionally, the DC ambient energy harvester includes a DC sensor, a first charging switch, and a first capacitor; a first terminal of the first charging switch is electrically connected to a first terminal of the DC sensor, a second terminal of the first charging switch is electrically connected to a first terminal of the first capacitor and a first terminal of the energy harvesting channel circuit, and a control terminal of the first charging switch is electrically connected to the controller; a second terminal of the DC sensor is electrically connected to a second terminal of the first capacitor and a second terminal of the energy harvesting channel circuit.

[0013] The DC sensor is used to convert sensed DC ambient energy into fluctuating DC voltage;

[0014] The first capacitor is used to regulate the DC voltage and provide a stable DC voltage when the first charging switch is switched to the on state.

[0015] Optionally, the AC ambient energy harvester includes an AC sensor, a first rectifier bridge, a second charging switch, and a second capacitor; a first terminal of the first rectifier bridge is electrically connected to a second terminal of the second charging switch, a second terminal of the first rectifier bridge is electrically connected to a first terminal of the AC sensor, a third terminal of the first rectifier bridge is electrically connected to a second terminal of the AC sensor, a fourth terminal of the first rectifier bridge is electrically connected to a second terminal of the second capacitor and grounded, and a control terminal of the first rectifier bridge is electrically connected to the controller; a first terminal of the second charging switch is electrically connected to both a first terminal of the second capacitor and a third terminal of the energy harvesting channel circuit.

[0016] The AC sensor is used to convert sensed AC ambient energy into AC voltage;

[0017] The first rectifier bridge is used to convert the AC voltage into a fluctuating DC voltage;

[0018] The second capacitor is used to regulate the fluctuating DC voltage and provide a stable DC voltage.

[0019] Optionally, the energy harvesting channel circuit includes: a channel switching circuit and a voltage regulation circuit; the channel switching circuit is electrically connected to the DC ambient energy harvester, the AC ambient energy harvester, the voltage regulation circuit, and the controller, respectively; the voltage regulation circuit is electrically connected to the controller and the load, respectively.

[0020] The channel switching circuit is used to convert AC power into DC power according to the control signal of the controller, and to supply the DC power to the voltage adjustment circuit;

[0021] The voltage adjustment circuit is used to output the target voltage according to the control signal from the controller.

[0022] Optionally, the channel switching circuit includes: a first channel selection unit and a second channel selection unit;

[0023] The first input terminal of the first channel selection unit is electrically connected to the first terminal of the DC ambient energy harvester, the second input terminal of the first channel selection unit is electrically connected to the second terminal of the energy harvesting channel circuit and the first terminal of the AC ambient energy harvester, the first output terminal of the first channel selection unit is electrically connected to the first terminal of the voltage adjustment circuit, the second output terminal of the first channel selection unit is electrically connected to the second terminal of the energy harvesting channel circuit, and the control terminal of the first channel selection unit is electrically connected to the controller.

[0024] The first input terminal of the second channel selection unit is electrically connected to the first terminal of the AC ambient energy harvester, the second input terminal of the second channel selection unit is grounded, the first output terminal of the second channel selection unit is electrically connected to the second output terminal of the first channel selection unit, the second output terminal of the second channel selection unit is grounded, and the control terminal of the second channel selection unit is electrically connected to the controller.

[0025] The first channel selection unit is used to select the first transmission channel for the energy provided by the DC ambient energy harvester;

[0026] The second channel selection unit is used to select a second transmission channel for the energy provided by the AC environmental energy harvester; the first transmission channel and the second transmission channel are connected in series.

[0027] Optionally, the first channel selection unit includes: a first switching switch and a second switching switch;

[0028] The first terminal of the first switching switch is electrically connected to the first terminal of the second switching switch and the first terminal of the first inductor, the second terminal of the first switching switch is electrically connected to the first terminal of the DC ambient energy harvester, and the control terminal of the first switching switch is electrically connected to the controller.

[0029] The second terminal of the second switching switch is electrically connected to the second terminal of the DC ambient energy harvester, and the control terminal of the second switching switch is electrically connected to the controller;

[0030] The first switching switch is used to switch to the on state when a control signal is received, and the second switching switch is used to switch to the off state when no control signal is received. The first switching switch constitutes a first transmission channel for transmitting energy provided by the DC ambient energy harvester.

[0031] The first switching switch is used to switch to the off state when no control signal is received, and the second switching switch is used to switch to the on state when a control signal is received. The second switching switch constitutes a first transmission channel for transmitting energy provided by the DC ambient energy harvester.

[0032] Optionally, the second channel selection unit includes a third switching switch and a fourth switching switch;

[0033] The first terminal of the third switch is electrically connected to the second terminal of the DC ambient energy harvester and the first terminal of the fourth switch, respectively. The second terminal of the third switch is electrically connected to the second terminal of the AC ambient energy harvester and the second channel selection unit. The control terminal of the third switch is electrically connected to the controller. The second terminal of the fourth switch is grounded.

[0034] The third switching switch is used to switch to the on state when a control signal is received, and the fourth switching switch is used to switch to the off state when no control signal is received. The third switching switch constitutes a second transmission channel for transmitting energy provided by the DC ambient energy harvester.

[0035] The third switch is used to switch to the off state when no control signal is received, and the fourth switch is used to switch to the on state when a control signal is received. The fourth switch constitutes a second transmission channel for transmitting energy provided by the DC ambient energy harvester.

[0036] Optionally, the voltage regulation circuit includes a first inductor, a second inductor, and a switching unit; the first inductor is electrically connected to the switching unit and the channel switching circuit, respectively, and the second inductor is electrically connected to the switching unit and the load, respectively.

[0037] The switching unit is used to switch to a first conducting state when a control signal is received, and to switch to a second conducting state when no control signal is received;

[0038] The first inductor is used to charge when the switching unit is in a first on state and to discharge when the switching unit is in a second on state;

[0039] The second inductor is used to charge when the switching unit is in a first on state and to discharge when the switching unit is in a second on state.

[0040] Optionally, the switching unit includes: a fifth switching switch, a third capacitor, and a freewheeling diode;

[0041] The first terminal of the fifth switching switch is electrically connected to the second terminal of the first inductor, the second terminal of the fifth switching switch is grounded, and the control terminal of the fifth switching switch is electrically connected to the controller.

[0042] The first terminal of the third capacitor is electrically connected to the second terminal of the first inductor, and the second terminal of the third capacitor is electrically connected to the first terminal of the second inductor and the first terminal of the freewheeling diode, respectively; the second terminal of the freewheeling diode is grounded; and the second terminal of the second inductor is electrically connected to the load.

[0043] According to a second aspect of this disclosure, an environmental energy harvesting method is provided, comprising:

[0044] Obtain the voltage values ​​of the DC ambient energy harvester and the AC ambient energy harvester;

[0045] The operating mode of the energy harvesting channel circuit is determined based on the voltage values ​​of the DC ambient energy harvester and the AC ambient energy harvester.

[0046] The output voltage of the energy harvesting channel circuit is controlled according to the operating mode and the operating voltage of the load, and the output voltage is greater than or equal to the operating voltage of the load.

[0047] Optionally, the operating mode of the energy harvesting channel circuit is determined based on the voltage values ​​of the DC ambient energy harvester and the AC ambient energy harvester, including:

[0048] The voltage values ​​of the DC ambient energy harvester and the AC ambient energy harvester are respectively obtained in a first magnitude relationship with their respective voltage thresholds;

[0049] When the first size relationship indicates that at least one voltage value is less than its respective voltage threshold, the working mode of the energy harvesting channel circuit is determined to be the first working mode, in which the DC environment energy harvester and the AC environment energy harvester are time-division multiplexed for power supply.

[0050] When the first size relationship indicates that each voltage value is greater than or equal to its respective voltage threshold, the working mode of the energy harvesting channel circuit is determined to be the second working mode, in which the DC environment energy harvester and the AC environment energy harvester are connected in series and powered synchronously.

[0051] Optionally, controlling the output voltage of the energy harvesting channel circuit according to the operating mode and the operating voltage of the load includes:

[0052] The target switching frequency of the fifth switching switch in the energy harvesting channel circuit under the operating mode is determined based on the operating voltage of the load.

[0053] The energy harvesting channel circuit is controlled according to the operating mode, and the fifth switching switch is controlled to be turned on or off according to the target switching frequency, so as to control the output voltage of the energy harvesting channel circuit, wherein the output voltage is greater than or equal to the operating voltage of the load.

[0054] According to a third aspect of this disclosure, an electronic device is provided, comprising an ambient energy harvesting system as described in any of the first aspects; the controller of the ambient energy harvesting system includes a processor and a memory;

[0055] The memory is used to store computer programs that can be executed by the processor;

[0056] The processor is configured to execute a computer program in the memory to implement the method as described in any of the second aspects.

[0057] According to a fourth aspect of this disclosure, a non-transitory computer-readable storage medium is provided, which, when an executable computer program in the storage medium is executed by a processor, enables the implementation of the method as described in any of the second aspects.

[0058] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0059] The solution provided in this embodiment utilizes a DC ambient energy harvester to collect DC ambient energy and an AC ambient energy harvester to collect AC ambient energy, which can improve the ambient energy collection capability. Furthermore, the energy provided by the DC and AC ambient energy harvesters can improve the output power capability, thereby achieving the effect of providing stable and reliable power supply to the load.

[0060] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0061] Figure 1 This is a block diagram of an environmental energy harvesting system according to an embodiment of the present disclosure.

[0062] Figure 2 This is a circuit diagram of an environmental energy harvesting system according to an embodiment of the present disclosure.

[0063] Figure 3 This is an equivalent circuit diagram of mode 1 under a first operating mode according to an embodiment of the present disclosure.

[0064] Figure 4 This is an equivalent circuit diagram of mode 2 under a first operating mode according to an embodiment of the present disclosure.

[0065] Figure 5This is an equivalent circuit diagram of mode 3 under a first operating mode according to an embodiment of the present disclosure.

[0066] Figure 6 This is an equivalent circuit diagram of mode 4 in a first operating mode according to an embodiment of the present disclosure.

[0067] Figure 7 This is an equivalent circuit diagram of mode 5 under a first operating mode according to an embodiment of the present disclosure.

[0068] Figure 8 This is an equivalent circuit diagram of mode 6 in a first operating mode according to an embodiment of the present disclosure.

[0069] Figure 9 This is an equivalent circuit diagram of mode 7 in a second operating mode according to an embodiment of the present disclosure.

[0070] Figure 10 This is an equivalent circuit diagram of mode 8 in a second operating mode according to an embodiment of the present disclosure.

[0071] Figure 11 This is an equivalent circuit diagram of mode 9 in a second operating mode according to an embodiment of the present disclosure.

[0072] Figure 12 This is an equivalent circuit diagram of mode 10 in a second operating mode according to an embodiment of the present disclosure.

[0073] Figure 13 This is a flowchart of an environmental energy harvesting method according to an embodiment of the present disclosure.

[0074] Figure 14 This is a flowchart illustrating one embodiment of the present disclosure of obtaining a working mode.

[0075] Figure 15 This is a flowchart illustrating the control of the output voltage of an energy harvesting channel circuit according to an embodiment of the present disclosure.

[0076] Figure 16 This is a block diagram of an electronic device according to an embodiment of the present disclosure. Detailed Implementation

[0077] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses consistent with some aspects of this disclosure as detailed in the appended claims.

[0078] This disclosure provides an environmental energy harvesting system, method, electronic device, and medium. See also Figure 1 The environmental energy harvesting system includes: a DC environmental energy harvester 11, an AC environmental energy harvester 12, an energy harvesting channel circuit 13, and a controller 14;

[0079] The DC ambient energy harvester 11 is electrically connected to the energy harvesting channel circuit 13 and is used to convert the harvested DC ambient energy into a first DC voltage and supply it to the energy harvesting channel circuit 13.

[0080] The AC ambient energy harvester 12 is electrically connected to the energy harvesting channel circuit 13 and is used to convert the harvested AC ambient energy into a second DC voltage and supply it to the energy harvesting channel circuit 13.

[0081] The controller 14 is used to determine the operating mode of the energy harvesting channel circuit 13 based on the first DC voltage and the second DC voltage, and to determine the target voltage output by the energy harvesting channel circuit based on the operating voltage of the load.

[0082] The energy harvesting channel circuit 13 is used to switch to the operating mode and output a target voltage when a control signal is received. The target voltage is greater than or equal to the operating voltage of the load.

[0083] Understandably, the DC ambient energy harvester 11 is used to harvest one type of energy: light energy or thermoelectric energy. The AC ambient energy harvester 12 is used to harvest one type of energy: vibration energy or radio frequency energy. Therefore, the DC ambient energy harvester 11 and the AC ambient energy harvester 12 harvest different types of ambient energy. Those skilled in the art can select the energy harvested by the DC ambient energy harvester 11 and the AC ambient energy harvester 12 according to the specific scenario, thereby enriching the types of ambient energy harvested by the ambient energy harvesting system and improving its ability to harvest ambient energy.

[0084] Understandably, after determining the energy to be harvested, the implementation methods of the DC ambient energy harvester 11 and the AC ambient energy harvester 12 can be selected. For example, when the DC ambient energy harvester 11 harvests solar energy, photovoltaic modules can be used, and when harvesting thermoelectric energy, thermocouples can be used. Similarly, the AC ambient energy harvester 12 can be implemented using AC generators, nano-AC generators, piezoelectric ceramic materials, etc., and the selection can be made according to the specific scenario. As long as the conversion of AC ambient energy into current can be achieved, the corresponding scheme falls within the protection scope of this disclosure.

[0085] In one embodiment, see Figure 2 The DC ambient energy harvester 11 includes a DC sensor DC, a first charging switch Sin1, and a first capacitor Cin1;

[0086] The first terminal of the first charging switch Sin1 is electrically connected to the first terminal of the DC sensor DC. The second terminal of the first charging switch Sin1 is electrically connected to the first terminal of the first capacitor Cin1 and the first terminal of the energy harvesting channel circuit 13. The control terminal of the first charging switch Sin1 is electrically connected to the controller 14.

[0087] The second terminal of the DC sensor DC is electrically connected to the second terminal of the first capacitor Cin1 and the second terminal of the energy harvesting channel circuit 13, respectively.

[0088] DC sensors are used to convert sensed DC ambient energy into fluctuating DC voltage;

[0089] The first capacitor Cin1 is used to regulate the DC voltage and provide a stable DC voltage when the first charging switch Sin1 is switched to the on state.

[0090] In this embodiment, the DC ambient energy harvester 11 collects ambient energy. When the first charging switch Sin1 is switched to the on state, the DC sensor DC can charge the first capacitor Cin1. When the first charging switch Sin1 is switched to the off state, the DC sensor DC cannot charge the first capacitor Cin1.

[0091] In one embodiment, see further. Figure 2 The AC ambient energy harvester 12 includes an AC sensor AC, a first rectifier bridge BR1, a second charging switch Sin2, and a second capacitor Cin2.

[0092] The first terminal of the first rectifier bridge BR1 is electrically connected to the second terminal of the second charging switch Sin2. The second terminal of the first rectifier bridge BR1 is electrically connected to the first terminal of the AC sensor AC. The third terminal of the first rectifier bridge BR1 is electrically connected to the second terminal of the AC sensor AC. The fourth terminal of the first rectifier bridge BR1 is electrically connected to the second terminal of the second capacitor Cin2 and grounded. The control terminal of the first rectifier bridge BR1 is electrically connected to the controller 14.

[0093] The first terminal of the second charging switch Sin2 is electrically connected to the first terminal of the second capacitor Cin2 and the third terminal of the energy harvesting channel circuit 13, respectively.

[0094] AC sensors are used to convert sensed AC ambient energy into AC voltage;

[0095] The first rectifier bridge BR1 is used to convert AC voltage into fluctuating DC voltage;

[0096] The second capacitor, Cin2, is used to regulate the fluctuating DC voltage and provide a stable DC voltage.

[0097] In this embodiment, the AC ambient energy harvester 12 collects AC ambient energy. When the second charging switch Sin2 is switched to the on state, the AC current sensor AC can sense the AC ambient energy and output AC voltage. The first rectifier bridge BR1 can rectify the AC voltage to obtain a fluctuating DC voltage. When the second charging switch Sin2 is switched to the on state, the fluctuating DC voltage can charge the second capacitor Cin2. When the second charging switch Sin2 is switched to the off state, the AC current sensor AC cannot charge the second capacitor Cin2.

[0098] In one embodiment, see further. Figure 2 The first rectifier bridge BR1 includes a first controllable switch SR1, a second controllable switch SR2, a third controllable switch SR3, and a fourth controllable switch SR4. The first terminal of the first controllable switch SR1 is electrically connected to the first terminal of the first rectifier bridge BR1 and the first terminal of the second controllable switch SR2, respectively. The second terminal of the first controllable switch SR1 is electrically connected to the second terminal of the first rectifier bridge BR1 and the first terminal of the third controllable switch SR3, respectively. The second terminal of the second controllable switch SR2 is electrically connected to the third terminal of the first rectifier bridge BR1 and the first terminal of the fourth controllable switch SR4, respectively. The second terminal of the third controllable switch SR3 is electrically connected to the second terminal of the fourth controllable switch SR4 and the fourth terminal of the first rectifier bridge BR1, and is grounded. Furthermore, the control terminals of each of the first controllable switch SR1, the second controllable switch SR2, the third controllable switch SR3, and the fourth controllable switch SR4 are all electrically connected to the controller 14.

[0099] In this way, the AC voltage output by the AC current sensor can be rectified into a fluctuating DC voltage by the first rectifier bridge BR1. The specific working principle of the first rectifier bridge BR1 can be found in the existing rectifier bridge operating methods, and will not be limited here.

[0100] In one embodiment, see further. Figure 2 The energy harvesting channel circuit 13 includes: a channel switching circuit 20 and a voltage adjustment circuit 30; the channel switching circuit 20 is electrically connected to the DC ambient energy harvester 11, the AC ambient energy harvester 12, the voltage adjustment circuit 30 and the controller 14 respectively; the voltage adjustment circuit 30 is electrically connected to the controller 14 and the load RL respectively.

[0101] The channel switching circuit 20 is used to convert AC power into DC power according to the control signal of the controller, and to supply the DC power to the voltage adjustment circuit 30;

[0102] The voltage adjustment circuit 30 is used to output the target voltage according to the control signal of the controller 14.

[0103] In one embodiment, see further. Figure 2The channel switching circuit 20 includes: a first channel selection unit 21 and a second channel selection unit 22;

[0104] The first input terminal of the first channel selection unit 21 is electrically connected to the first terminal of the DC ambient energy harvester 11. The second input terminal of the first channel selection unit 21 is electrically connected to the second terminal of the energy harvesting channel circuit 13 and the first terminal of the AC ambient energy harvester 12. The first output terminal of the first channel selection unit 21 is electrically connected to the first terminal of the voltage adjustment circuit 30. The second output terminal of the first channel selection unit 21 is electrically connected to the second terminal of the energy harvesting channel circuit 13. The control terminal of the first channel selection unit 21 is electrically connected to the controller 14.

[0105] The first input terminal of the second channel selection unit 22 is electrically connected to the first terminal of the AC ambient energy harvester 12 and the third terminal of the energy harvesting channel circuit 13, respectively. The second input terminal of the second channel selection unit 22 is electrically connected to the fourth terminal of the energy harvesting channel circuit 13 and grounded. The first output terminal of the second channel selection unit 22 is electrically connected to the second output terminal of the first channel selection unit 21. The second output terminal of the second channel selection unit 22 is grounded to GND. The control terminal of the second channel selection unit 22 is electrically connected to the controller 14.

[0106] The first channel selection unit 21 is used to select the first transmission channel for the energy provided by the DC ambient energy harvester;

[0107] The second channel selection unit 22 is used to select a second transmission channel for the energy provided by the AC ambient energy harvester 12; the first transmission channel and the second transmission channel are connected in series RL.

[0108] In one embodiment, see further. Figure 2 The first channel selection unit 21 includes: a first switching switch S1 and a second switching switch S2;

[0109] The first terminal of the first switching switch S1 is electrically connected to the first terminal of the second switching switch S2 and the first terminal of the first inductor L, respectively. The second terminal of the first switching switch S1 is electrically connected to the first terminal of the DC ambient energy harvester 11. The control terminal of the first switching switch S1 is electrically connected to the controller 14.

[0110] The second terminal of the second switching switch S2 is electrically connected to the second terminal of the DC ambient energy harvester 11, and the control terminal of the second switching switch S2 is electrically connected to the controller 14.

[0111] The first switching switch S1 is used to switch to the on state when a control signal is received, and the second switching switch S2 is used to switch to the off state when no control signal is received. The first switching switch S1 constitutes the first transmission channel for the DC ambient energy harvester 11 to provide energy.

[0112] The first switching switch S1 is used to switch to the off state when no control signal is received, and the second switching switch S2 is used to switch to the on state when a control signal is received. The second switching switch S2 constitutes the first transmission channel for the DC ambient energy harvester 11 to provide energy.

[0113] In one embodiment, see further. Figure 2 The second channel selection unit 22 includes a third switching switch S3 and a fourth switching switch S4;

[0114] The first terminal of the third switch S3 is electrically connected to the second terminal of the DC ambient energy harvester 11 and the first terminal of the fourth switch S4, respectively. The second terminal of the third switch S3 is electrically connected to the second terminal of the AC ambient energy harvester 12 and the second channel selection unit 22. The control terminal of the third switch S3 is electrically connected to the controller 14. The second terminal of the fourth switch S4 is grounded to GND.

[0115] The third switching switch S3 is used to switch to the on state when a control signal is received, and the fourth switching switch S4 is used to switch to the off state when no control signal is received. The third switching switch S3 constitutes the second transmission channel for the DC ambient energy harvester 11 to provide energy.

[0116] The third switching switch S3 is used to switch to the off state when no control signal is received, and the fourth switching switch S4 is used to switch to the on state when a control signal is received. The fourth switching switch S4 constitutes the second transmission channel for the DC ambient energy harvester 11 to provide energy.

[0117] In one embodiment, see further. Figure 2 The voltage adjustment circuit 30 includes a first inductor L1, a second inductor L2, and a switching unit 31; the first inductor L1 is electrically connected to the switching unit 31 and the channel switching circuit 20, respectively, and the second inductor L2 is electrically connected to the switching unit 31 and the load RL, respectively.

[0118] The switching unit 31 is used to switch to a first conducting state when a control signal is received, and to switch to a second conducting state when no control signal is received;

[0119] The first inductor L1 is used to charge when the switching unit 31 is in a first conducting state and to discharge when the switching unit 31 is in a second conducting state.

[0120] The second inductor L2 is used to charge when the switching unit 31 is in the first conducting state and to discharge when the switching unit 31 is in the second conducting state.

[0121] In one embodiment, see further. Figure 2The switching unit 31 includes: a fifth switching switch S5, a third capacitor C3, and a freewheeling diode D1; the first terminal of the fifth switching switch S5 is electrically connected to the second terminal of the first inductor L1, the second terminal of the fifth switching switch S5 is grounded to GND, and the control terminal of the fifth switching switch S5 is electrically connected to the controller 14; the first terminal of the third capacitor C3 is electrically connected to the second terminal of the first inductor L1, and the second terminal of the third capacitor C3 is electrically connected to the first terminal of the second inductor L2 and the first terminal of the freewheeling diode D1 respectively; the second terminal of the freewheeling diode D1 is grounded to GND; and the second terminal of the second inductor L2 is electrically connected to the load RL.

[0122] The fifth switching switch S5 is used to switch to the on state after receiving a control signal. At this time, the first inductor L1 and the fifth switching switch S5 form a charging circuit for charging the first inductor L1. The freewheeling diode D1 is reverse biased and not conducting. The third capacitor C3, the second inductor L2, and the output capacitor Cout form a charging circuit, and the third capacitor C3 supplies power to the second inductor L2 and the output capacitor Cout. Alternatively, at this time, the voltage adjustment circuit 30 switches to the first on state, and both the first inductor L1 and the third inductor L2 are in the charging state.

[0123] The fifth switching switch S5 is used to switch to the off state after no control signal is received. At this time, the first inductor L1, the third capacitor S3, and the freewheeling diode D1 form a discharge circuit in which the first inductor L1 discharges and the third capacitor S3 discharges; the second inductor L2 and the output capacitor Cout form a discharge circuit, and the second inductor L2 supplies power to the output capacitor Cout. Alternatively, at this time, the voltage adjustment circuit 30 switches to the second conduction state, and both the first inductor L1 and the third inductor L2 are in the discharge state.

[0124] In one embodiment, see further. Figure 2 The energy harvesting channel circuit 13 also includes an output capacitor Cout. The first terminal of the output capacitor Cout is electrically connected to the second terminal of the second inductor L2, and the second terminal of the output capacitor Cout is grounded. The output capacitor Cout can store the energy provided by the first capacitor Cin1, the second capacitor Cin2, the first inductor L1, and the second inductor L2. Its output voltage Vout is the target voltage. The output voltage Vout is related to the duty cycle D of the fifth switching switch S5, as shown in equation (1).

[0125]

[0126] In equation (1), Vin can be Vin1, Vin2, or Vin1+Vin2.

[0127] Combination Figures 1-2Example of an environmental energy harvesting system, whose operating modes include:

[0128] First working mode

[0129] In this example, the first operating mode refers to the simultaneous collection of ambient energy by the DC ambient energy harvester 11 and the AC ambient energy harvester 12, with each independently transmitting energy; in other words, the first capacitor Cin1 and the second capacitor Cin2 are time-division multiplexed for power supply. It is understood that the first operating mode is suitable for scenarios with weak ambient energy and insufficient power supply. The DC ambient energy harvester 11 and the AC ambient energy harvester 12 achieve the effect of fully collecting different ambient energies by collecting ambient energy over a longer period. It is assumed that the instantaneous power provided by both the DC ambient energy harvester 11 and the AC ambient energy harvester 12 is low, i.e., the charging current provided is very small.

[0130] In one example, in the first operating mode, the first capacitor Cin1 discharges and the second capacitor Cin2 charges.

[0131] The discharge of the first capacitor Cin1 includes four modes: Mode 1, where the first capacitor Cin1 charges the first inductor L1; Mode 2, where the first capacitor Cin1 and the first inductor L jointly supply power to the load. In Modes 1 and 2, the AC sensor AC charges the second capacitor Cin2 in a normal manner. Mode 3, where the first capacitor Cin1 charges the first inductor L; Mode 4, where the first capacitor Cin1 and the first inductor L jointly supply power to the load. In Modes 3 and 4, the AC sensor AC charges the second capacitor Cin2 in an inverse manner. The normal manner refers to the charging circuit formed by the first controllable switch SR1 and the third controllable switch SR3, while the inverse manner refers to the charging circuit formed by the second controllable switch SR2 and the fourth controllable switch SR4.

[0132] Mode 1: The first charging switch Sin1 is switched to the off state and the second switching switch S2 is switched to the on state; the first switching switch S1, the fourth switching switch S4, and the fifth switching switch S5 are switched to the on state, and the second switching switch S2 and the third switching switch S3 are switched to the off state, thus obtaining the power supply circuit for the first capacitor Cin1 to charge the first inductor L, and the power supply circuit for the third capacitor to charge the second inductor L2. The equivalent circuit is as follows: Figure 3 The dashed line indicates that the second capacitor, Cin2, is continuously charging at this time.

[0133] Mode 2: The first charging switch Sin1 is switched to the off state and the second switching switch S2 is switched to the on state; the first switching switch S1 and the fourth switching switch S4 are switched to the on state, and the second switching switch S2, the third switching switch S3 and the fifth switching switch S5 are switched to the off state, thus obtaining the power supply circuit for the first capacitor Cin1 to charge the first inductor L. The equivalent circuit is as follows: Figure 4 The dashed line indicates that the second capacitor, Cin2, is continuously charging at this time.

[0134] Mode 3: The first charging switch Sin1 is switched to the off state and the second switching switch S2 is switched to the on state; the first switching switch S1, the fourth switching switch S4, and the fifth switching switch S5 are switched to the on state, and the second switching switch S2 and the third switching switch S3 are switched to the off state, thus obtaining the power supply circuit for the first capacitor Cin1 to charge the first inductor L. The equivalent circuit is as follows: Figure 5 The dashed line indicates that the second capacitor, Cin2, is continuously charging at this time.

[0135] Mode 4: The first charging switch Sin1 is switched to the off state and the second switching switch S2 is switched to the on state; the first switching switch S1 and the fourth switching switch S4 are switched to the on state, and the second switching switch S2, the third switching switch S3 and the fifth switching switch S5 are switched to the off state, thus obtaining the power supply circuit for the first capacitor Cin1 to charge the first inductor L. The equivalent circuit is as follows: Figure 6 The dashed line indicates that the second capacitor, Cin2, is continuously charging at this time.

[0136] In another example, in the first operating mode, the second capacitor Cin2 discharges while the first capacitor Cin1 charges. The discharge of the second capacitor Cin2 includes two modes: mode 5, where the second capacitor Cin2 charges the first inductor L; and mode 6, where the second capacitor Cin2 and the first inductor L jointly supply power to the load.

[0137] Mode 5: The first charging switch Sin1 is switched to the ON state and the second switching switch S2 is switched to the OFF state; the first switching switch S1 and the fourth switching switch S4 are switched to the OFF state, and the second switching switch S2, the third switching switch S3 and the fifth switching switch S5 are switched to the ON state, thus obtaining a power supply circuit for the second capacitor Cin2 to charge the first inductor L, and a power supply circuit for the third capacitor C3 to supply power to the output capacitor Cout and the second inductor L2. The equivalent circuit is as follows: Figure 7 The dashed line indicates that the first capacitor Cin1 is continuously charging at this time.

[0138] Mode 6: The first charging switch Sin1 is switched to the conducting state and the second switching switch S2 is switched to the off state; the first switching switch S1 and the fourth switching switch S4 are switched to the off state, and the second switching switch S2, the third switching switch S3 and the fifth switching switch S5 are switched to the conducting state, obtaining a power supply circuit for charging the third capacitor C3 by the second capacitor Cin2 and the first inductor device L, and a power supply circuit for supplying power to the output capacitor Cout by the second inductor device L2. The equivalent circuit is as shown by the dotted line in Figure 8 . At this time, the first capacitor Cin1 is in a continuous charging state.

[0139] In this embodiment, the voltage change frequency of the AC sensor AC is f2. Every time T2 / 2 (T2 = 1 / f2) elapses, the output of the AC sensor AC becomes positive or negative, and the system mode rotates from mode 1 to mode 2, or rotates from mode 3 to mode 4. At the same time, the system operating frequency is f1, and the controller completes the rotation of modes 1 to 4 in the first half cycle (0 < t < T1 / 2) (T1 = 1 / f1); in the second half cycle (T / 2 < t < T) time, it completes the switching between modes 5 and 6; and the time ratio of the switching of modes 1 to 6 determines the magnitude of the output voltage of the voltage adjustment circuit. Among them, T1 is the system operating cycle, and the relationship with the system power frequency f1 is f1 = 1 / T1; t is the timing time, and when t exceeds T1, it is cleared and the timing starts again.

[0140] Combined with the above process, in the first working mode, the maximum input voltage of the ambient energy harvesting system is Vin1 or Vin2, and the maximum transmitted energy in each cycle is the energy E1 stored in the first capacitor Cin1 and the second capacitor Cin2, as shown in Equation (2).

[0141]

[0142] If the boost effect of the voltage adjustment circuit is not considered, the maximum output voltage Vout1 of the system is as shown in Equation (3).

[0143] V = max{V in1 , V in2} (3)

[0144] Based on the above assumptions, the maximum output instantaneous power of the system is Pout1, as shown in Equation (4).

[0145]

[0146] Second working mode

[0147] In this example, the second operating mode refers to the scenario where the DC ambient energy harvester 11 and the AC ambient energy harvester 12 simultaneously output energy; or, in other words, by connecting the first capacitor Cin1 and the second capacitor Cin2 in series, the system can simultaneously harvest energy from two different types of AC ambient energy while increasing the maximum input voltage and maximum instantaneous output power. Understandably, in this operating mode, the DC ambient energy harvester 11 and the AC ambient energy harvester 12 have a stronger current-providing capability to keep the voltages of the first capacitor Cin1 and the second capacitor Cin2 stable.

[0148] The second operating mode includes: Mode 7, where the first capacitor Cin1 and the second capacitor Cin2 are connected in series to charge the first inductor L; Mode 8, where the first capacitor Cin1, the second capacitor Cin2, and the first inductor L together supply power to the load; and Mode 9, where the first capacitor Cin1 and the second capacitor Cin2 are charged separately.

[0149] Mode 7: The first charging switch Sin1 and the second charging switch Sin2 are switched to the off state, the first switching switch S1, the third switching switch S3 and the fifth switching switch S5 are switched to the on state, and the second switching switch S2 and the fourth switching switch S4 are switched to the off state. At this time, the first capacitor Cin1 and the second capacitor Cin2 are connected in series and charge the first inductor L together. The third capacitor C3 supplies power to the output capacitor Cout. The equivalent circuit is as follows. Figure 9 The example is a dashed line.

[0150] Mode 8: The first charging switch Sin1 and the second charging switch Sin2 are switched to the off state, the first switching switch S1 and the third switching switch S3 are switched to the on state, and the second switching switch S2, the fourth switching switch S4, and the fifth switching switch S5 are switched to the off state. At this time, the first capacitor Cin1, the second capacitor Cin2, and the first inductor L can charge the third capacitor C3, and the second inductor L2 supplies power to the output capacitor Cout. The equivalent circuit is as follows: Figure 10 The example is a dashed line.

[0151] Mode 9: The first capacitor Cin1 is charging, and the second capacitor is charging normally, as shown below. Figure 11 As shown.

[0152] Mode 10: The first capacitor Cin1 is charged, and the second capacitor is charged in a negative state, as shown below. Figure 12 As shown.

[0153] In the second working mode, the maximum input voltage of the environmental energy harvesting system is Vin1+Vin2. The maximum energy transmitted in each cycle is determined by the load. If the voltage adjustment circuit is not considered, the maximum output voltage of the system is Vout2, as shown in equation (5).

[0154] V out2 =V in1 +V in2 (5)

[0155] Furthermore, the maximum instantaneous output power of the system is Pout2, as shown in equation (6).

[0156]

[0157] Comparing equations (3) and (5), it can be seen that the maximum instantaneous power that the system can output within a cycle in working mode 2 is greater than the sum of the output power in the first half cycle and the second half cycle in working mode 1, as shown in equation (7).

[0158]

[0159] In this embodiment, the second operating mode can significantly increase the maximum instantaneous power of multiple energy harvesting systems in different types of AC environments.

[0160] By combining the first and second working modes, this disclosed solution can be applied to various environmental conditions to fully collect energy from multiple AC types of environments. It not only realizes the function of simultaneous collection of energy from two AC environments, increasing the total amount of energy collected, but also, through switching working modes, can increase the maximum instantaneous output power of the system when the environmental energy is sufficient, thus better meeting the power supply needs of IoT devices.

[0161] based on Figures 1-12 The illustrated environmental energy harvesting system, in this disclosure embodiment also provides an environmental energy harvesting method, see [link to relevant documentation]. Figure 13 This includes steps 131 to 133.

[0162] In step 131, the voltage values ​​of the DC ambient energy harvester and the AC ambient energy harvester are obtained.

[0163] In this step, the controller can acquire the output voltage values ​​of the DC ambient energy harvester, the AC ambient energy harvester, and the load's operating voltage. In one example, this can be determined by detecting the voltage values ​​of the first capacitor Cin1 and the second capacitor Cin2. When the load is a battery, the load's operating voltage refers to the battery's current voltage; when the load is a power-consuming device, the load's operating voltage refers to its rated operating voltage, which can be selected according to the specific scenario.

[0164] In step 132, the operating mode of the energy harvesting channel circuit is determined based on the voltage values ​​of the DC ambient energy harvester and the AC ambient energy harvester.

[0165] In one example, the operating mode of the energy harvesting channel circuit is determined based on the voltage values ​​of the DC ambient energy harvester and the AC ambient energy harvester, see [link to relevant documentation]. Figure 14 The process includes: In step 141, the controller can obtain a first magnitude relationship between the voltage values ​​of the DC ambient energy harvester and the AC ambient energy harvester and their respective voltage thresholds. The controller can obtain the voltage thresholds of the first capacitor Cin1 and the second capacitor Cin2, and then compare the first capacitor Cin1 and its voltage threshold and the second capacitor Cin2 and its voltage threshold to obtain the first magnitude relationship. It is understood that the first capacitor Cin1 and the second capacitor Cin2 each correspond to a first magnitude relationship. In step 142, when the first magnitude relationship indicates that the voltage value of at least one capacitor is less than its respective voltage threshold, the controller can determine that the operating mode of the energy harvesting channel circuit is a first operating mode, in which the DC ambient energy harvester and the AC ambient energy harvester are time-division multiplexed for power supply; in step 143, when the first magnitude relationship indicates that the voltage value of each capacitor is greater than or equal to its respective voltage threshold, the controller can determine that the operating mode of the energy harvesting channel circuit is a second operating mode, in which the DC ambient energy harvester and the AC ambient energy harvester are connected in series and synchronously powered.

[0166] In step 133, the output voltage of the energy harvesting channel circuit is controlled according to the operating mode and the operating voltage of the load, wherein the output voltage is greater than or equal to the operating voltage of the load.

[0167] In this step, the controller can control the output voltage of the energy harvesting channel circuit according to the operating mode and the operating voltage of the load. (See [link]) Figure 15 The process includes: In step 151, the controller can determine the target switching frequency of the fifth switching switch in the energy harvesting channel circuit under the operating mode based on the operating voltage of the load. In step 152, the controller can control the channel switching circuit in the energy harvesting channel circuit according to the operating mode and control the fifth switching switch to be turned on or off according to the target switching frequency, so as to control the output voltage of the energy harvesting channel circuit, wherein the output voltage is greater than or equal to the operating voltage of the load.

[0168] In this embodiment, the environmental energy harvesting system can be controlled to switch between the first and second operating states. For example, when the ambient energy is weak, the DC environmental energy harvester 11 and / or the AC environmental energy harvester 12 harvests environmental energy slowly. In this case, the system switches to the first operating state, utilizing the AC environmental energy harvester, which harvests environmental energy relatively quickly, to provide power, while the other AC environmental energy harvester first charges the capacitor, and then supplies power when the capacitor is fully charged. Alternatively, when the ambient energy is strong, the DC environmental energy harvester 11 and the AC environmental energy harvester 12 harvest environmental energy quickly. In this case, the system switches to the second operating state, utilizing both AC environmental energy harvesters to supply power simultaneously, which can improve the instantaneous output voltage and power. Furthermore, when the load is a battery, the second operating mode can be used to charge the battery initially; when the battery reaches a preset voltage, the system switches to the first operating mode to charge, improving charging efficiency. Also, when the load's operating voltage is low, the output voltage of the second operating mode may be higher than the load's operating voltage. In this case, the system switches to the first operating mode to supply power, thereby ensuring the load operates normally.

[0169] Figure 16 This is a block diagram illustrating an electronic device according to an exemplary embodiment. For example, the electronic device 1600 may be a smartphone, computer, digital broadcasting terminal, tablet device, medical device, fitness equipment, personal digital assistant, etc.

[0170] The electronic device may include Figures 1-12 In addition to the structure shown, refer to Figure 16 The electronic device 1600 may also include one or more of the following components: processing component 1602, memory 1604, power supply component 1606, multimedia component 1608, audio component 1610, input / output (I / O) interface 1612, sensor component 1614, communication component 1616, and image acquisition component 1618.

[0171] Processing component 1602 typically controls the overall operation of electronic device 1600, such as operations associated with display, telephone calls, data communication, camera operation, and recording operations. Processing component 1602 may include one or more processors 1620 to execute computer programs. Furthermore, processing component 1602 may include one or more modules to facilitate interaction between processing component 1602 and other components. For example, processing component 1602 may include a multimedia module to facilitate interaction between multimedia component 1608 and processing component 1602. In one example, the processing component may include a controller that includes a processor for performing the methods described above.

[0172] Memory 1604 is configured to store various types of data to support the operation of electronic device 1600. Examples of such data include computer programs for any application or method operating on electronic device 1600, contact data, phone book data, messages, pictures, videos, etc. Memory 1604 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. In one example, memory 1604 also includes processor-compatible memory for storing computer programs that the processor can execute.

[0173] Power supply component 1606 provides power to various components of electronic device 1600. Power supply component 1606 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to electronic device 1600. Power supply component 1606 may also utilize the aforementioned environmental energy harvesting system to collect environmental parameters for battery power.

[0174] Multimedia component 1608 includes a screen that provides an output interface between electronic device 1600 and target object. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touchscreen to receive input information from the target object. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may sense not only the boundaries of touch or swipe actions but also the duration and pressure associated with the touch or swipe operation.

[0175] Audio component 1610 is configured to output and / or input audio file information. For example, audio component 1610 includes a microphone (MIC) configured to receive external audio file information when electronic device 1600 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio file information may be further stored in memory 1604 or transmitted via communication component 1616. In some embodiments, audio component 1610 also includes a speaker for outputting audio file information.

[0176] I / O interface 1612 provides an interface between processing component 1602 and peripheral interface modules, such as keyboards, click wheels, buttons, etc.

[0177] Sensor assembly 1614 includes one or more sensors for providing state assessments of various aspects of electronic device 1600. For example, sensor assembly 1614 can detect the on / off state of electronic device 1600, the relative positioning of components (e.g., the display screen and keypad of electronic device 1600), changes in position of electronic device 1600 or a component, the presence or absence of contact between a target object and electronic device 1600, the orientation or acceleration / deceleration of electronic device 1600, and temperature changes of electronic device 1600. In this example, sensor assembly 1614 may include magnetic sensors, gyroscopes, and magnetic field sensors, and may also include inertial sensors, image sensors, etc., wherein the magnetic field sensor includes at least one of the following: a Hall sensor, a thin-film magnetoresistive sensor, and a magnetic fluid accelerometer.

[0178] Communication component 1616 is configured to facilitate wired or wireless communication between electronic device 1600 and other devices. Electronic device 1600 can access wireless networks based on communication standards, such as WiFi, 2G, 3G, 4G, 5G, or combinations thereof. In one exemplary embodiment, communication component 1616 receives broadcast information or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 1616 also includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0179] In an exemplary embodiment, the electronic device 1600 may be implemented by one or more application-specific integrated circuits (ASICs), digital information processors (DSPs), digital information processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components.

[0180] In an exemplary embodiment, a non-transitory computer-readable storage medium is also provided, which enables the implementation of the method described above when an executable computer program in the storage medium is executed by a processor.

[0181] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of this disclosure. This disclosure is intended to cover any variations, uses, or adaptations that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0182] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. An ambient energy harvesting system, characterized by, The application relates to an energy collection system. The DC environment energy collector is electrically connected with the energy collection channel circuit, and is used for converting collected DC environment energy into a first DC voltage and providing the first DC voltage to the energy collection channel circuit. The AC environment energy collector is electrically connected with the energy collection channel circuit, and is used for converting collected AC environment energy into a second DC voltage and providing the second DC voltage to the energy collection channel circuit. The controller is used for determining the working mode of the energy collection channel circuit according to the first DC voltage and the second DC voltage, and determining the target voltage output by the energy collection channel circuit according to the working voltage of a load. The energy collection channel circuit is used for switching to the working mode and outputting the target voltage when a control signal is received, and the target voltage is greater than or equal to the working voltage of the load. The DC environment energy collector is used for collecting light energy or temperature difference energy; and the AC environment energy collector is used for collecting vibration energy or radio frequency energy.

2. The ambient energy harvesting system of claim 1, wherein, The DC environment energy collector comprises a DC sensor, a first charging switch and a first capacitor; the first end of the first charging switch is electrically connected with the first end of the DC sensor; the second end of the first charging switch is electrically connected with the first end of the first capacitor and the first end of the energy collection channel circuit respectively; the control end of the first charging switch is electrically connected with the controller; the second end of the DC sensor is electrically connected with the second end of the first capacitor and the second end of the energy collection channel circuit respectively.

3. The ambient energy harvesting system of claim 1, wherein, The DC sensor is used for converting sensed DC environment energy into a fluctuant DC voltage. The first capacitor is used for stabilizing the DC voltage and providing a stable DC voltage when the first charging switch switches to a conducting state. The AC environment energy collector comprises an AC sensor, a first rectifier bridge, a second charging switch and a second capacitor; the first end of the first rectifier bridge is electrically connected with the second end of the second charging switch; the second end of the first rectifier bridge is electrically connected with the first end of the AC sensor; the third end of the first rectifier bridge is electrically connected with the second end of the AC sensor; the fourth end of the first rectifier bridge is electrically connected with the second end of the second capacitor and grounded; the control end of the first rectifier bridge is electrically connected with the controller; the first end of the second charging switch is electrically connected with the first end of the second capacitor and the third end of the energy collection channel circuit respectively.

4. The ambient energy harvesting system of claim 1, wherein, The AC sensor is used for converting sensed AC environment energy into an AC voltage. The first rectifier bridge is used for converting the AC voltage into a fluctuant DC voltage. The second capacitor is used for stabilizing the fluctuant DC voltage and providing a stable DC voltage. The energy collection channel circuit comprises a channel switching circuit and a voltage adjusting circuit; the channel switching circuit is electrically connected with the DC environment energy collector, the AC environment energy collector, the voltage adjusting circuit and the controller respectively; and the voltage adjusting circuit is electrically connected with the controller and a load respectively.

5. The ambient energy harvesting system of claim 1, wherein, ​ The channel switching circuit is configured to convert alternating current into direct current according to a control signal of the controller, and provide the direct current to the voltage adjustment circuit; The voltage adjustment circuit is configured to output the target voltage according to a control signal of the controller.

6. The ambient energy harvesting system of claim 5, wherein, The channel switching circuit comprises a first channel selection unit and a second channel selection unit. The first input end of the first channel selection unit is electrically connected with the first end of the direct current environment energy collector, the second input end of the first channel selection unit is electrically connected with the second end of the energy collection channel circuit and the first end of the alternating current environment energy collector respectively, the first output end of the first channel selection unit is electrically connected with the first end of the voltage adjustment circuit, the second output end of the first channel selection unit is electrically connected with the second end of the energy collection channel circuit, and the control end of the first channel selection unit is electrically connected with the controller. The first input end of the second channel selection unit is electrically connected with the first end of the alternating current environment energy collector, the second input end of the second channel selection unit is grounded, the first output end of the second channel selection unit is electrically connected with the second output end of the first channel selection unit, the second output end of the second channel selection unit is grounded, and the control end of the second channel selection unit is electrically connected with the controller. The first channel selection unit is configured to select a first transmission channel for the energy provided by the direct current environment energy collector. The second channel selection unit is configured to select a second transmission channel for the energy provided by the alternating current environment energy collector; and the first transmission channel and the second transmission channel are connected in series.

7. The ambient energy harvesting system of claim 6, wherein, The first channel selection unit comprises a first switching switch and a second switching switch. The first end of the first switching switch is electrically connected with the first end of the second switching switch and the first end of the first inductive device respectively, the second end of the first switching switch is electrically connected with the first end of the direct current environment energy collector, and the control end of the first switching switch is electrically connected with the controller. The second end of the second switching switch is electrically connected with the second end of the direct current environment energy collector, and the control end of the second switching switch is electrically connected with the controller. The first switching switch is configured to switch to a conducting state when a control signal is received, and the second switching switch is configured to switch to a non-conducting state when no control signal is received, and the first switching switch constitutes a first transmission channel for transmitting the energy provided by the direct current environment energy collector. The first switching switch is configured to switch to a non-conducting state when no control signal is received, and the second switching switch is configured to switch to a conducting state when a control signal is received, and the second switching switch constitutes a first transmission channel for transmitting the energy provided by the direct current environment energy collector.

8. The ambient energy harvesting system of claim 6, wherein, The second channel selection unit comprises a third switching switch and a fourth switching switch. The first end of the third switch is electrically connected with the second end of the direct current environment energy collector and the first end of the fourth switch, respectively, the second end of the third switch is electrically connected with the second end of the alternating current environment energy collector and the second channel selection unit, and the control end of the third switch is electrically connected with the controller; the second end of the fourth switch is grounded; The third switch is used for switching to the conducting state when the control signal is received, and the fourth switch is used for switching to the open state when the control signal is not received, and the third switch constitutes a second transmission channel for transmitting the energy provided by the direct current environment energy collector; The third switch is used for switching to the open state when the control signal is not received, and the fourth switch is used for switching to the conducting state when the control signal is received, and the fourth switch constitutes a second transmission channel for transmitting the energy provided by the direct current environment energy collector.

9. The ambient energy harvesting system of claim 5, wherein, The voltage adjustment circuit comprises a first inductive device, a second inductive device and a switch unit; the first inductive device is electrically connected with the switch unit and the channel switching circuit, respectively, and the second inductive device is electrically connected with the switch unit and the load, respectively; The switch unit is used for switching to a first conducting state when the control signal is received, and switching to a second conducting state when the control signal is not received; The first inductive device is used for charging when the switch unit is in the first conducting state and discharging when the switch unit is in the second conducting state; The second inductive device is used for charging when the switch unit is in the first conducting state and discharging when the switch unit is in the second conducting state.

10. The ambient energy harvesting system of claim 9, wherein, The switch unit comprises a fifth switch, a third capacitor and a freewheeling diode; The first end of the fifth switch is electrically connected with the second end of the first inductive device, the second end of the fifth switch is grounded, and the control end of the fifth switch is electrically connected with the controller; The first end of the third capacitor is electrically connected with the second end of the first inductive device, the second end of the third capacitor is electrically connected with the first end of the second inductive device and the first end of the freewheeling diode, respectively; the second end of the freewheeling diode is grounded; and the second end of the second inductive device is electrically connected with the load.

11. A method of ambient energy harvesting, the method comprising: It comprises: acquiring voltage values of a direct current environment energy collector and an alternating current environment energy collector; determining a working mode of an energy collection channel circuit according to the voltage values of the direct current environment energy collector and the alternating current environment energy collector; controlling an output voltage of the energy collection channel circuit according to the working mode and a working voltage of a load, the output voltage being greater than or equal to the working voltage of the load.

12. The method of claim 11, wherein, The method for determining a working mode of an energy collection channel circuit according to voltage values of a direct current environment energy collector and an alternating current environment energy collector comprises: acquiring a first size relationship between the voltage values of the direct current environment energy collector and the alternating current environment energy collector and respective voltage threshold values, respectively; determining the working mode of the energy harvesting channel circuit as a first working mode when the first size relationship indicates that there is at least one voltage value less than the respective voltage threshold, in which the DC ambient energy harvester and the AC ambient energy harvester are time-multiplexed for power supply in the first working mode; determining the working mode of the energy harvesting channel circuit as a second working mode when the first size relationship indicates that each voltage value is greater than or equal to the respective voltage threshold, in which the DC ambient energy harvester and the AC ambient energy harvester are series-synchronized for power supply in the second working mode.

13. The method of claim 11, wherein, controlling the output voltage of the energy harvesting channel circuit according to the working mode and the working voltage of the load, comprising: determining a target switching frequency of a fifth switching switch in the energy harvesting channel circuit according to the working voltage of the load in the working mode; controlling the output voltage of the energy harvesting channel circuit according to the working mode and the target switching frequency, in which the output voltage is greater than or equal to the working voltage of the load.

14. An electronic device, comprising: an ambient energy harvesting system as claimed in any one of claims 1 to 10; the controller of the ambient energy harvesting system comprising a processor and a memory; the memory is configured to store a computer program executable by the processor; the processor is configured to execute the computer program in the memory to implement the method as claimed in any one of claims 11 to 13.

15. A non-transitory computer-readable storage medium, comprising: the executable computer program in the storage medium, when executed by the processor, is capable of implementing the method as claimed in any one of claims 11 to 13.

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