CN109617260B - Electromagnetic energy conversion device and system - Google Patents
Electromagnetic energy conversion device and system Download PDFInfo
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- CN109617260B CN109617260B CN201910075198.2A CN201910075198A CN109617260B CN 109617260 B CN109617260 B CN 109617260B CN 201910075198 A CN201910075198 A CN 201910075198A CN 109617260 B CN109617260 B CN 109617260B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J15/00—Systems for storing electric energy
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Abstract
The invention relates to the technical field of energy conversion, and provides an electromagnetic energy conversion device and system, which comprise an antenna, a rectification module, a load module, a voltage division module and a control module, wherein the antenna converts a received electromagnetic signal into an electric signal and then transmits the electric signal to the rectification module; the control module acquires a voltage division signal corresponding to the load module through the voltage division module, sets a target rectification parameter of the rectification module according to the voltage division signal so as to rectify the electric signal, adjusts the resistance value of the load module according to the voltage division signal, and then performs impedance matching with the rectification module; the rectifying module rectifies the electric signal according to the target rectifying parameter and transmits the rectified electric signal to the load module; when the load module is matched with the rectifying module in impedance, the rectified electrical signal is transmitted to the energy storage device for storage. The electromagnetic energy conversion device and the electromagnetic energy conversion system provided by the invention solve the problems that the electromagnetic energy conversion device in the prior art cannot normally work in a changing environment and is not strong in adaptability.
Description
Technical Field
The invention relates to the technical field of energy conversion, in particular to an electromagnetic energy conversion device and system.
Background
The radio frequency/microwave energy collection technology is an important component of the wireless power transmission technology, and receives radio signals transmitted in the air or in a directional mode through an antenna, and the radio signals are converted into direct current signals to be stored or directly supplied to an electric system.
Because the receiving antenna of the microwave/radio frequency energy collecting system is in a far-field working state, the received power can be in a changing state due to the influence of multipath fading, position change and the like. And the detection module of the microwave/radio frequency energy collection system is a nonlinear device, and the Power Conversion Efficiency (PCE) of the detection module is related to the input power (Pin), so that the power conversion efficiency of the energy collection system presents a single-bump narrow-band input signal characteristic. Meanwhile, since the device parasitic parameters of the energy collector are closely related to the input signal, the power conversion efficiency of the energy collection system can also be greatly changed under different power input signals. The change of the input power caused by the changing environment seriously affects the actual working state of the energy collecting system, and even seriously causes the power conversion efficiency to be sharply reduced, so that the energy collecting system is difficult to work normally and the actual use of the energy collecting system is restricted.
The electromagnetic energy conversion device in the prior art can not work normally in a changing environment, and has low adaptability.
Disclosure of Invention
The invention aims to provide an electromagnetic energy conversion device and an electromagnetic energy conversion system, which aim to solve the problems that the electromagnetic energy conversion device in the prior art cannot normally work in a changing environment and is not strong in adaptability.
In order to achieve the above purpose, the embodiment of the present invention adopts the following technical solutions:
the invention provides an electromagnetic energy conversion device and a system, wherein the electromagnetic energy conversion device is electrically connected with an energy storage device and comprises an antenna, a rectification module, a load module, a voltage division module and a control module, wherein the control module is electrically connected with the rectification module, the load module and the voltage division module; the antenna is used for receiving electromagnetic signals, converting the electromagnetic signals into electric signals and transmitting the electric signals to the rectifying module; the control module is used for acquiring a voltage division signal corresponding to the load module through the voltage division module, setting a target rectification parameter of the rectification module according to the voltage division signal so as to rectify the electric signal, adjusting the resistance value of the load module according to the voltage division signal and then performing impedance matching with the rectification module; the rectifying module is used for rectifying the electric signal according to a target rectifying parameter set by the control module and transmitting the rectified electric signal to the load module; and the load module is used for transmitting the rectified electrical signal to the energy storage device for storage when the load module is matched with the rectifying module in impedance.
Further, the rectification module comprises a first selection unit, a first rectification unit and a second rectification unit, the first rectification unit corresponds to a first rectification parameter, the second rectification unit corresponds to a second rectification parameter, the first selection unit is electrically connected with the first rectification unit and the second rectification unit, the first selection unit is electrically connected with the antenna and the control module, and the first rectification unit and the second rectification unit are electrically connected with the load module; the control module is further configured to control the first selection unit to be conducted with a target rectification unit according to a target rectification parameter, so that the target rectification unit rectifies the electrical signal, where the target rectification unit is the first rectification unit or the second rectification unit.
Further, the first rectifying unit comprises a first rectifying circuit and a first low-pass filter, the first rectifying circuit is electrically connected with the first selecting unit, and the first low-pass filter is electrically connected with the load module; the first rectifying circuit comprises a first matching circuit and a first rectifying tube circuit, the first matching circuit is electrically connected with the first selecting unit, and the first rectifying tube circuit is electrically connected with the first low-pass filter.
Further, the first matching circuit comprises a first capacitor, a first transmission line, a second transmission line and a third transmission line, and the first rectifier tube circuit comprises a first diode and a second diode; the first selection unit, the first capacitor, the second transmission line, the second diode and the first low-pass filter are electrically connected in sequence, one end of the first capacitor is electrically connected with the first selection unit, the other end of the first capacitor is electrically connected with one end of the second transmission line, one end of the second transmission line is electrically connected with the first transmission line, the other end of the second transmission line is electrically connected with the third transmission line, the other end of the second transmission line is electrically connected with the cathode of the first diode and the anode of the second diode, the anode of the first diode is grounded, and the cathode of the second diode is electrically connected with the first low-pass filter.
Further, the second rectifying unit comprises a second rectifying circuit and a second low-pass filter, the second rectifying circuit is electrically connected with the first selecting unit, and the second low-pass filter is electrically connected with the load module; the second rectifying circuit includes a second matching circuit and a second rectifier tube circuit, the second matching circuit is electrically connected to ground through the second rectifier tube circuit, and the second matching circuit is electrically connected to the second low-pass filter.
Further, the second matching circuit includes a second capacitor, a fourth transmission line, a fifth transmission line, a sixth transmission line, a seventh transmission line, an eighth transmission line, a ninth transmission line, and a tenth transmission line, and the second rectifier circuit includes a third diode and a fourth diode; the first selection unit, the second capacitor, the fourth transmission line, the eighth transmission line and the second low-pass filter are electrically connected in sequence, one end of the second capacitor is electrically connected with the first selection unit, the other end of the second capacitor is electrically connected with one end of the fourth transmission line, one end of the fourth transmission line is also electrically connected with the fifth transmission line, the other end of the fourth transmission line is electrically connected with one end of the sixth transmission line, one end of the seventh transmission line and one end of the eighth transmission line, the other end of the seventh transmission line is electrically connected with the cathode of the third diode, the anode of the third diode is grounded, the other end of the eighth transmission line is electrically connected with one end of the ninth transmission line, one end of the tenth transmission line and the second low-pass filter, and the other end of the tenth transmission line is electrically connected with the cathode of the fourth diode, the anode of the fourth diode is grounded.
Further, the load module comprises a second selection unit and a resistor array, the second selection unit is electrically connected with the control module and the rectifying module, the resistor array is electrically connected with the energy storage device, the resistor array comprises a plurality of resistors, and the plurality of resistors are electrically connected with the second selection unit; the control module is further used for controlling the second selection unit to be conducted with a target resistor according to the voltage division signal so as to adjust the resistance value of the load module.
Furthermore, the control module comprises a microcontroller and a wake-up clock unit, the microcontroller is electrically connected with the wake-up clock unit, and the microcontroller is electrically connected with the voltage division module, the rectification module and the load module; the awakening clock unit is used for awakening the microcontroller according to a preset time interval.
Further, the voltage dividing module includes a first voltage dividing resistor and a second voltage dividing resistor, one end of the first voltage dividing resistor is electrically connected to the load module, the other end of the first voltage dividing resistor is connected in series with the second voltage dividing resistor and grounded, and an input end of the control module is electrically connected between the first voltage dividing resistor and the second voltage dividing resistor to obtain the voltage dividing signal.
An electromagnetic energy conversion system comprises the electromagnetic energy conversion device, the electromagnetic energy conversion device comprises an antenna, a rectification module, a load module, a voltage division module and a control module, the control module is electrically connected with the rectification module, the load module and the voltage division module, the rectification module is electrically connected with the antenna and the load module, the load module is electrically connected with the voltage division module, and the load module is electrically connected with an energy storage device; the antenna is used for receiving electromagnetic signals, converting the electromagnetic signals into electric signals and transmitting the electric signals to the rectifying module; the control module is used for acquiring a voltage division signal corresponding to the load module through the voltage division module, setting a target rectification parameter of the rectification module according to the voltage division signal so as to rectify the electric signal, adjusting the resistance value of the load module according to the voltage division signal and then performing impedance matching with the rectification module; the rectifying module is used for rectifying the electric signal according to a target rectifying parameter set by the control module and transmitting the rectified electric signal to the load module; and the load module is used for transmitting the rectified electrical signal to the energy storage device for storage when the load module is matched with the rectifying module in impedance. The electromagnetic energy conversion system further comprises an energy storage device, and the electromagnetic energy conversion device is electrically connected with the energy storage device.
Compared with the prior art, the invention has the following beneficial effects:
according to the electromagnetic energy conversion device provided by the invention, the voltage division module is used for acquiring the voltage division signal corresponding to the load module, the target rectification parameter of the rectification module and the resistance value of the load module are adjusted according to the voltage division signal, so that the rectification module rectifies the electric signal transmitted by an antenna according to the target rectification parameter, the load module and the rectification module are subjected to impedance matching so as to efficiently transmit the rectified electric signal to the energy storage device for storage, and the control module adjusts the target rectification parameter of the rectification module and the resistance value of the load module according to the actual situation, so that the electromagnetic energy conversion device provided by the embodiment of the invention can still normally work in a changing environment, and the adaptability of the electromagnetic energy conversion device is improved.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a first block diagram of an electromagnetic energy conversion device provided by an embodiment of the present invention.
Fig. 2 illustrates a second block schematic diagram of an electromagnetic energy conversion device provided by an embodiment of the present invention.
Fig. 3 shows a block schematic diagram of a rectifier module provided by an embodiment of the invention.
Fig. 4 shows a circuit diagram of a first rectifying unit provided in an embodiment of the present invention.
Fig. 5 shows a circuit diagram of a second rectifying unit provided by an embodiment of the present invention.
Fig. 6 shows a circuit diagram of a load module provided by an embodiment of the invention.
Fig. 7 shows a circuit diagram of a voltage divider module according to an embodiment of the present invention.
Fig. 8 illustrates a block schematic diagram of an electromagnetic energy conversion system provided by an embodiment of the present invention.
Icon: 10-an electromagnetic energy conversion system; 100-electromagnetic energy conversion means; 110-an antenna; 120-a rectification module; 121-a first selection unit; 122-a first rectifying unit; 1221-a first rectifying circuit; 12211 — a first matching circuit; 12212-a first rectifier circuit; 1222-a first low pass filter; 123-a second rectifying unit; 1231-a second rectification circuit; 12311 — a second matching circuit; 12312-second rectifier circuit; 1232 — a second low pass filter; 130-a load module; 131-a second selection unit; 132-a resistive array; 140-a voltage division module; 150-a control module; 151-a microcontroller; 152-wake up clock unit; 200-an energy storage device; c1 — first capacitance; c2 — second capacitance; d1 — first diode; d2 — second diode; d3 — third diode; d4 — fourth diode; TL1 — first transmission line; TL 2-second transmission line; TL 3-third transmission line; TL 4-fourth transmission line; TL 5-fifth transmission line; TL 6-sixth transmission line; TL 7-seventh transmission line; TL 8-eighth transmission line; TL 9-ninth transmission line; TL 10-tenth transmission line; rs 1-first divider resistor; rs 2-second divider resistor; r1 — first resistance; r2 — second resistance; r3 — third resistance; r4-fourth resistor; r5-fifth resistor; r6-sixth resistance; r7 — seventh resistor; r8 — eighth resistance.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
The radio frequency/microwave energy collection technology is an important component of the wireless power transmission technology, and receives radio signals transmitted in the air or in a directional mode through an antenna, and the radio signals are converted into direct current signals to be stored or directly supplied to an electric system.
Because the receiving antenna of the microwave/radio frequency energy collecting system is in a far-field working state, the received power can be in a changing state due to the influence of multipath fading, position change and the like. And the detection module of the microwave/radio frequency energy collection system is a nonlinear device, and the Power Conversion Efficiency (PCE) of the detection module is related to the input power (Pin), so that the power conversion efficiency of the energy collection system presents a single-bump narrow-band input signal characteristic. Meanwhile, since the device parasitic parameters of the energy collector are closely related to the input signal, the power conversion efficiency of the energy collection system can also be greatly changed under different power input signals. The change of the input power caused by the changing environment seriously affects the actual working state of the energy collecting system, and even seriously causes the power conversion efficiency to be sharply reduced, so that the energy collecting system is difficult to work normally and the actual use of the energy collecting system is restricted.
In order to solve the problem that the electromagnetic energy conversion device 100 cannot work normally in a changing environment and is not highly adaptable, an embodiment of the present invention provides an electromagnetic energy conversion device 100, which efficiently transmits a rectified electrical signal to an energy storage device 200 for storage, can still work normally in a changing environment, and has the advantages of relatively stable power conversion efficiency under a relatively wide input signal, and high applicability.
Referring to fig. 1, a first block diagram of an electromagnetic energy conversion device is provided according to an embodiment of the present invention. The electromagnetic energy conversion device 100 is electrically connected to the energy storage device 200, the electromagnetic energy conversion device 100 includes an antenna 110, a rectifying module 120, a load module 130, a voltage dividing module 140 and a control module 150, the control module 150 is electrically connected to the rectifying module 120, the load module 130 and the voltage dividing module 140, the rectifying module 120 is electrically connected to the antenna 110 and the load module 130, the load module 130 is electrically connected to the voltage dividing module 140, and the load module 130 is electrically connected to the energy storage device 200.
The antenna 110 is electrically connected to the rectifying module 120, and is configured to receive the electromagnetic signal, convert the electromagnetic signal into an electrical signal, and transmit the electrical signal to the rectifying module 120. The antenna 110 is a part for receiving an electromagnetic wave in a radio apparatus and converting the propagated electromagnetic wave into a guided wave propagating on a transmission line. In particular, the antenna 110 may be used to receive electromagnetic energy such as radio frequency and microwave. The antenna 110 may be, but is not limited to, a one-dimensional antenna 110 or a two-dimensional antenna 110. It should be noted that the electrical signal in the embodiment of the present invention is a signal transmitted through a circuit.
The rectifying module 120 is electrically connected to the antenna 110, the load module 130, and the control module 150, and is configured to rectify the electrical signal transmitted from the antenna 110 according to a target rectification parameter under the control of the control module 150, and transmit the rectified electrical signal to the load module 130.
Referring to fig. 2, the rectifying module 120 includes a first selecting unit 121, a first rectifying unit 122 and a second rectifying unit 123, the first selecting unit 121 is electrically connected to the first rectifying unit 122 and the second rectifying unit 123, the first selecting unit 121 is electrically connected to the antenna 110 and the control module 150, and the first rectifying unit 122 and the second rectifying unit 123 are electrically connected to the load module 130.
The first rectifying unit 122 corresponds to a first rectifying parameter, the second rectifying unit 123 corresponds to a second rectifying parameter, at the same time point, the first selecting unit 121 can only be conducted with one target rectifying unit, the target rectifying unit can be the first rectifying unit 122 or the second rectifying unit 123, the target rectifying parameter can be the first rectifying parameter or the second rectifying parameter, when the target rectifying parameter is the first rectifying parameter, the target rectifying unit corresponding to the target rectifying parameter is the first rectifying unit 122, and when the target rectifying parameter is the second rectifying parameter, the target rectifying unit corresponding to the target rectifying parameter is the second rectifying unit 123. Specifically, the first selection unit 121 is conducted with a target rectification unit corresponding to the target rectification parameter under the control of the control module 150, the electric signal transmitted by the antenna 110 passes through the first selection unit 121 to the target rectification unit, and the target rectification unit rectifies the electric signal to obtain a rectified electric signal. As an embodiment, the first rectifying unit 122 may be a low power rectifying unit, and the second rectifying unit 123 may be a high power rectifying unit.
The first selection unit 121 is electrically connected to the antenna 110, the first rectification unit 122, the second rectification unit 123 and the control module 150, and the first selection unit 121 is configured to be conducted with the first rectification unit 122 or the second rectification unit 123 according to a target rectification parameter under the control of the control module 150, and transmit an electrical signal transmitted by the antenna 110 to a target rectification unit corresponding to the target rectification parameter for rectification after the conduction. The first selection unit 121 may be a two-out-of-one data selector, or may be another multiplexer, and when the first selection unit 121 is another multiplexer, two paths of the selection multiplexer may be connected to the first rectification unit 122 and the second rectification unit 123, respectively.
In other embodiments of the present invention, the first selecting unit 121 may also be a single-pole double-throw switch, when the first selecting unit 121 is a single-pole double-throw switch, the connection relationship of the circuit may change adaptively, the first selecting unit 121 is electrically connected to the first rectifying unit 122 or the second rectifying unit 123, and at the same time, the first selecting unit 121 is electrically connected to only one of the first rectifying unit 122 and the second rectifying unit 123.
It should be noted that, when the control module 150 does not set the target rectification parameter, the first selection unit 121 may conduct one of the first rectification unit 122 and the second rectification unit 123, specifically, the first selection unit 121 is electrically connected to the second rectification unit 123, and the first selection unit 121 is conducted to the second rectification unit 123.
The first rectifying unit 122 is electrically connected to the first selecting unit 121 and the load module 130, and is configured to rectify the electrical signal transmitted by the first selecting unit 121 when the target rectifying unit is the first rectifying unit 122.
Referring to fig. 3, the first rectifying unit 122 includes a first rectifying circuit 1221 and a first low-pass filter 1222, the first rectifying circuit 1221 is electrically connected to the first selecting unit 121, and the first low-pass filter 1222 is electrically connected to the load module 130. The first rectifying circuit 1221 is configured to primarily rectify the electrical signal transmitted by the first selecting unit 121, and the first low-pass filter 1222 is configured to filter the primarily rectified electrical signal to obtain a rectified and filtered (hereinafter referred to as "rectified") electrical signal, and transmit the rectified and filtered electrical signal to the load module 130.
The first rectifying circuit 1221 includes a first matching circuit 12211 and a first rectifier circuit 12212, the first matching circuit 12211 is electrically connected to the first selection unit 121, and the first rectifier circuit 12212 is electrically connected to the first low-pass filter 1222.
Referring to fig. 4, the first matching circuit 12211 includes a first capacitor C1, a first transmission line TL1, a second transmission line TL2, and a third transmission line TL3, and the first rectifying tube 12212 includes a first diode D1 and a second diode D2; the first selection unit 121, the first capacitor C1, the second transmission line TL2, the second diode D2 and the first low-pass filter 1222 are electrically connected in sequence, one end of the first capacitor C1 is electrically connected to the first selection unit 121, the other end of the first capacitor C1 is electrically connected to one end of the second transmission line TL2, one end of the second transmission line TL2 is further electrically connected to (one end of) the first transmission line TL1, the other end of the second transmission line TL2 is electrically connected to (one end of) the third transmission line TL3, the cathode of the first diode D1 and the anode of the second diode D2 are both electrically connected, the anode of the first diode D1 is grounded, and the cathode of the second diode D2 is electrically connected to the first low-pass filter 1222. The other end of the first transmission line TL1 and the other end of the third transmission line TL3 are both floating.
The second rectifying unit 123 is electrically connected to the first selecting unit 121 and the load module 130, and is configured to rectify the electrical signal transmitted by the first selecting unit 121 when the target rectifying unit is the second rectifying unit 123.
The second rectifying unit 123 includes a second rectifying circuit 1231 and a second low-pass filter 1232, the second rectifying circuit 1231 and the second low-pass filter 1232 are electrically connected, the second rectifying circuit 1231 is electrically connected to the first selecting unit 121, and the second low-pass filter 1232 is electrically connected to the load module 130. The second rectifying circuit 1231 is configured to primarily rectify the electrical signal transmitted by the first selecting unit 121, and the second low-pass filter 1232 is configured to filter the primarily rectified electrical signal to obtain a rectified and filtered (hereinafter referred to as "rectified") electrical signal, and transmit the rectified and filtered electrical signal to the load module 130.
The second rectification circuit 1231 includes a second matching circuit 12311 and a second rectifier tube circuit 12312, the second matching circuit 12311 is electrically connected to the first selection unit 121, the second matching circuit 12311 is electrically connected to the ground through a second rectifier tube circuit 12312, and the second matching circuit 12311 is electrically connected to the second low-pass filter 1232.
Referring to fig. 5, the second matching circuit 12311 includes a second capacitor C2, a fourth transmission line TL4, a fifth transmission line TL5, a sixth transmission line TL6, a seventh transmission line TL7, an eighth transmission line TL8, a ninth transmission line TL9, and a tenth transmission line TL10, and the second rectifying circuit 12312 includes a third diode D3 and a fourth diode D4; the first selection unit 121, the second capacitor C2, the fourth transmission line TL4, the eighth transmission line TL8 and the second low-pass filter 1232 are electrically connected in sequence, one end of the second capacitor C2 is electrically connected to the first selection unit 121, the other end of the second capacitor C2 is electrically connected to one end of the fourth transmission line TL4, one end of the fourth transmission line TL4 is further electrically connected to (one end of) the fifth transmission line TL5, the other end of the fourth transmission line TL4 is electrically connected to (one end of) the sixth transmission line TL6, one end of the seventh transmission line TL7 and one end of the eighth transmission line TL8, the other end of the seventh transmission line TL7 is electrically connected to the cathode of the third diode D3, the anode of the third diode D3 is grounded, the other end of the eighth transmission line TL8 is electrically connected to (one end of) the ninth transmission line TL9, one end of the tenth transmission line TL10 and the second low-pass filter 1232, the other end of the tenth transmission line TL10 is electrically connected to the cathode of the, the anode of the fourth diode D4 is grounded. The other end of the fifth transmission line TL5, the other end of the sixth transmission line TL6, and the other end of the ninth transmission line TL9 are all suspended.
The load module 130 is electrically connected to the rectifying module 120, the voltage dividing module 140 and the control module 150, the load module 130 is electrically connected to the energy storage device 200, and the load module 130 is used for performing impedance matching with the rectifying module 120 under the control of the control module 150, so that the output power corresponding to the rectified electrical signal is maximally transmitted to the energy storage device 200 for storage.
The load module 130 includes a second selection unit 131 and a resistor array 132, the second selection unit 131 is electrically connected to the control module 150 and the rectifying module 120, the resistor array 132 is electrically connected to the energy storage device 200, the resistor array 132 includes a plurality of resistors, and the plurality of resistors are electrically connected to the second selection unit 131.
The second selecting unit 131 is electrically connected to the resistor array 132, the rectifying module 120 and the control module 150, and is configured to be conducted with a target resistor in the resistor array 132 under the control of the control module 150, so as to adjust the resistance of the load module 130. The target resistance may be one or more resistances in the resistor array 132. The second selection unit 131 may be a multiplexer, for example, an eight-out-of-one selection chip with model number SN74CBTLV 3251. Referring to FIG. 6, the SN74CBTLV3251 chip includes an S0 input terminal, an S1 input terminal, an S2 input terminal,
The input end, the output end of B1, the output end of B2, the output end of B3, the output end of B4, the output end of B5, the output end of B6, the output end of B7 and the output end of B8. An S0 input, an S1 input, an S2 input, and
the input ends are electrically connected with the control module 150, a first resistor R1 is connected between the output end of the B8 and the output end of the B7, a second resistor R2 is connected between the output end of the B7 and the output end of the B6, a third resistor R3 is connected between the output end of the B6 and the output end of the B5, a fourth resistor R4 is connected between the output end of the B5 and the output end of the B4, a fifth resistor R5 is connected between the output end of the B4 and the output end of the B3, a sixth resistor R6 is connected between the output end of the B3 and the output end of the B2, a seventh resistor R7 is connected between the output end of the B2 and the output end of the B1.
In other embodiments of the present invention, the second selecting unit 131 may also be a single-pole eight-throw switch, when the second selecting unit 131 is a single-pole eight-throw switch, the connection relationship of the circuit changes adaptively, and the second selecting unit 131 is electrically connected to one resistor in the resistor array 132, that is, the second selecting unit 131 is electrically connected to only one resistor in the resistor array 132 at the same time.
The voltage dividing module 140 is electrically connected to both the load module 130 and the control module 150, and the input end of the control module 150 obtains a voltage dividing signal corresponding to the load module 130 through the voltage dividing module 140. Referring to fig. 7, the voltage dividing module 140 includes a first voltage dividing resistor Rs1 and a second voltage dividing resistor Rs2, one end of the first voltage dividing resistor Rs1 is electrically connected to the load module 130, the other end of the first voltage dividing resistor Rs1 is connected in series with the second voltage dividing resistor Rs2 and grounded, and an input end of the control module 150 is electrically connected between the first voltage dividing resistor Rs1 and the second voltage dividing resistor Rs2 to obtain a voltage dividing signal. Port 1 is an output voltage port and port 2 is a connection port of the control module 150. Since the ratio of the first voltage-dividing resistor Rs1 to the second voltage-dividing resistor Rs2 is fixed, when the voltage-dividing signal corresponding to the load module 130 is detected, the output voltage corresponding to the target resistor in the load module 130 can be obtained, and the output voltage is the voltage-dividing signal (Rs1+ Rs2)/Rs 2.
The control module 150 is electrically connected to the rectifying module 120, the load module 130, and the voltage dividing module 140, and is configured to obtain a voltage dividing signal corresponding to the load module 130 through the voltage dividing module 140, set a target rectifying parameter of the rectifying module 120 according to the voltage dividing signal to rectify the electrical signal, and adjust a resistance value of the load module 130 according to the voltage dividing signal, so that the resistance value of the load module 130 is impedance-matched with the rectifying module 120, and output power corresponding to the rectified electrical signal is maximized.
Specifically, the control module 150 compares the divided voltage signal with a voltage threshold, sets the target rectification parameter as a first rectification parameter when the divided voltage signal is smaller than the divided voltage threshold, and sets the target rectification parameter as a second rectification parameter when the divided voltage signal is greater than or equal to the divided voltage threshold. The control module 150 pre-stores a one-to-one correspondence relationship between the voltage dividing signal and the load resistance value, and the control module 150 finds the corresponding load resistance value according to the detected voltage dividing signal to adjust the resistance value of the load module 130.
The control module 150 includes a microcontroller 151 and a wake-up clock unit 152, the microcontroller 151 is electrically connected to the wake-up clock unit 152, and the microcontroller 151 is electrically connected to the voltage dividing module 140, the rectifying module 120 and the load module 130.
The microcontroller 151 is electrically connected to the voltage dividing module 140, the rectifying module 120 and the load module 130, and is configured to obtain a voltage dividing signal corresponding to the load module 130 through the voltage dividing module 140, set a target rectifying parameter of the rectifying module 120 according to the voltage dividing signal to rectify the electrical signal, and adjust a resistance value of the load module 130 according to the voltage dividing signal, so that the resistance value of the load module 130 is impedance-matched with the rectifying module 120, and output power corresponding to the rectified electrical signal is maximized.
As an embodiment, the microcontroller 151 may be an integrated circuit chip having signal Processing capability, and the microcontroller 151 may be a general-purpose Processor including a Central Processing Unit (CPU), a Network Processor (NP), etc., and may also be a digital signal Processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. For example, the microcontroller 151 may be, but is not limited to, a single chip microcomputer of the STC32L152C8T6 series.
The wake-up clock unit 152 is electrically connected to the microcontroller 151, and is configured to wake up the microcontroller 151 at preset time intervals. The preset time interval may be a user-defined time interval, for example, 10 s. The wakeup clock unit 152 sends a wakeup signal to the microcontroller 151 at regular time to wake up the microcontroller 151, and when the microcontroller 151 receives the wakeup signal, the microcontroller starts to enter a working state, executes to acquire a voltage division signal, sets a target rectification parameter of the rectification module 120 and adjusts the resistance value of the load module 130 according to the voltage division signal, continues for a period of time, and then enters a sleep state until a next wakeup signal arrives, and the microcontroller 151 continues to repeat the above operations to reduce the energy consumption of the microcontroller 151.
The working principle provided by the embodiment of the invention is as follows: in the electromagnetic energy conversion device 100, the antenna 110 converts the received electromagnetic signal into an electrical signal, converts the electrical signal into a direct current electrical signal through the rectifying module 120, and transmits the direct current electrical signal to the load module 130, the control module 150 detects a voltage division signal corresponding to the load module 130 through the voltage division module 140, sets a target rectifying parameter of the rectifying module 120 according to the voltage division signal to rectify the electrical signal, adjusts a resistance value of the load module 130 according to the voltage division signal, and then performs impedance matching with the rectifying module 120, so that the output power corresponding to the rectified electrical signal is maximally transmitted to the energy storage device 200 for storage.
Referring to fig. 8, an electromagnetic energy conversion system 10 according to an embodiment of the present invention includes the electromagnetic energy conversion device 100 and an energy storage device 200, where the energy storage device 200 is electrically connected to the electromagnetic energy conversion device 100, and the energy storage device 200 stores the rectified electrical signal transmitted by the electromagnetic energy conversion device 100.
The energy storage device 200 is used for storing the electrical signal transmitted from the electromagnetic energy conversion device 100, and the energy storage device 200 may be, but is not limited to, an inductor, a capacitor, a superconducting energy storage device, and the like.
In summary, in the electromagnetic energy conversion device and the electromagnetic energy conversion system provided by the present invention, the control module detects the voltage division signal corresponding to the load module through the voltage division module, sets the target rectification parameter of the rectification module according to the voltage division signal to rectify the electrical signal, adjusts the resistance value of the load module according to the voltage division signal, and then performs impedance matching with the rectification module, so as to maximize the output power corresponding to the rectified electrical signal, and transmits the rectified electrical signal to the energy storage device for storage. Compared with the prior art, the electromagnetic energy conversion system and the electromagnetic energy conversion device provided by the embodiment of the invention have the following beneficial effects: firstly, determining target rectification parameters according to voltage division signals corresponding to a load module, and selecting a proper target rectification unit to rectify an electric signal so as to adapt to different electromagnetic signals; secondly, in order to reduce the power consumption of the whole controller, the microcontroller adopts two states of working and sleeping for monitoring and controlling. In a working state, the electromagnetic energy conversion device detects the partial pressure in real time and sets a target rectification parameter of the rectification module and the resistance value of the load module; in the sleep state, the energy consumption is reduced, the wake-up clock unit provides wake-up signals periodically, and the microcontroller is recovered to work.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
Claims (8)
1. An electromagnetic energy conversion device is characterized in that the electromagnetic energy conversion device is electrically connected with an energy storage device and comprises an antenna, a rectifying module, a load module, a voltage dividing module and a control module, wherein the control module is electrically connected with the rectifying module, the load module and the voltage dividing module;
the antenna is used for receiving electromagnetic signals, converting the electromagnetic signals into electric signals and transmitting the electric signals to the rectifying module;
the control module is used for acquiring a voltage division signal corresponding to the load module through the voltage division module, setting a target rectification parameter of the rectification module according to the voltage division signal so as to rectify the electric signal, adjusting the resistance value of the load module according to the voltage division signal and then performing impedance matching with the rectification module;
the rectifying module is used for rectifying the electric signal according to a target rectifying parameter set by the control module and transmitting the rectified electric signal to the load module;
the load module is used for transmitting the rectified electrical signal to the energy storage device for storage when the load module is matched with the rectifying module in impedance;
the control module comprises a microcontroller and a wake-up clock unit, the microcontroller is electrically connected with the wake-up clock unit, and the microcontroller is electrically connected with the voltage division module, the rectification module and the load module;
the awakening clock unit is used for awakening the microcontroller according to a preset time interval;
the voltage dividing module comprises a first voltage dividing resistor and a second voltage dividing resistor, one end of the first voltage dividing resistor is electrically connected to the load module, the other end of the first voltage dividing resistor is connected in series with the second voltage dividing resistor and grounded, and the input end of the control module is electrically connected between the first voltage dividing resistor and the second voltage dividing resistor to acquire the voltage dividing signal.
2. The electromagnetic energy conversion device of claim 1, wherein said rectification module comprises a first selection unit, a first rectification unit and a second rectification unit, said first rectification unit corresponds to a first rectification parameter, said second rectification unit corresponds to a second rectification parameter, said first selection unit is electrically connected to said first rectification unit and said second rectification unit, said first selection unit is electrically connected to said antenna and said control module, and said first rectification unit and said second rectification unit are electrically connected to said load module;
the control module is further configured to control the first selection unit to be conducted with a target rectification unit according to a target rectification parameter, so that the target rectification unit rectifies the electrical signal, where the target rectification unit is the first rectification unit or the second rectification unit.
3. The electromagnetic energy conversion device of claim 2, wherein said first rectification unit comprises a first rectification circuit and a first low pass filter, said first rectification circuit being electrically connected to said first low pass filter, and said first rectification circuit being electrically connected to said first selection unit, said first low pass filter being electrically connected to said load module;
the first rectifying circuit comprises a first matching circuit and a first rectifying tube circuit, the first matching circuit is electrically connected with the first selecting unit, and the first rectifying tube circuit is electrically connected with the first low-pass filter.
4. The electromagnetic energy conversion device of claim 3, wherein said first matching circuit comprises a first capacitor, a first transmission line, a second transmission line, and a third transmission line, said first rectifier circuit comprising a first diode and a second diode;
the first selection unit, the first capacitor, the second transmission line, the second diode and the first low-pass filter are electrically connected in sequence, one end of the first capacitor is electrically connected with the first selection unit, the other end of the first capacitor is electrically connected with one end of the second transmission line, one end of the second transmission line is electrically connected with the first transmission line, the other end of the second transmission line is electrically connected with the third transmission line, the other end of the second transmission line is electrically connected with the cathode of the first diode and the anode of the second diode, the anode of the first diode is grounded, and the cathode of the second diode is electrically connected with the first low-pass filter.
5. The electromagnetic energy conversion device of claim 2, wherein said second rectification unit comprises a second rectification circuit and a second low pass filter, said second rectification circuit being electrically connected to said second low pass filter, and said second rectification circuit being electrically connected to said first selection unit, said second low pass filter being electrically connected to said load module;
the second rectifying circuit includes a second matching circuit and a second rectifier tube circuit, the second matching circuit is electrically connected to ground through the second rectifier tube circuit, and the second matching circuit is electrically connected to the second low-pass filter.
6. The electromagnetic energy conversion device of claim 5, wherein said second matching circuit comprises a second capacitor, a fourth transmission line, a fifth transmission line, a sixth transmission line, a seventh transmission line, an eighth transmission line, a ninth transmission line, and a tenth transmission line, said second rectifier circuit comprises a third diode and a fourth diode;
the first selection unit, the second capacitor, the fourth transmission line, the eighth transmission line and the second low-pass filter are electrically connected in sequence, one end of the second capacitor is electrically connected with the first selection unit, the other end of the second capacitor is electrically connected with one end of the fourth transmission line, one end of the fourth transmission line is also electrically connected with the fifth transmission line, the other end of the fourth transmission line is electrically connected with one end of the sixth transmission line, one end of the seventh transmission line and one end of the eighth transmission line, the other end of the seventh transmission line is electrically connected with the cathode of the third diode, the anode of the third diode is grounded, the other end of the eighth transmission line is electrically connected with one end of the ninth transmission line, one end of the tenth transmission line and the second low-pass filter, and the other end of the tenth transmission line is electrically connected with the cathode of the fourth diode, the anode of the fourth diode is grounded.
7. The electromagnetic energy conversion device of claim 1, wherein said load module comprises a second selection unit and a resistor array, said second selection unit being electrically connected to said resistor array, said second selection unit being electrically connected to both said control module and said rectifying module, said resistor array being electrically connected to said energy storage device, said resistor array comprising a plurality of resistors, and said plurality of resistors being electrically connected to said second selection unit;
the control module is further used for controlling the second selection unit to be conducted with a target resistor according to the voltage division signal so as to adjust the resistance value of the load module.
8. An electromagnetic energy conversion system comprising the electromagnetic energy conversion device of any of claims 1-7, the electromagnetic energy conversion system further comprising an energy storage device, the electromagnetic energy conversion device being electrically connected to the energy storage device.
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