CN113258949B - Signal-energy multiplexing receiving device and wireless receiving link system - Google Patents
Signal-energy multiplexing receiving device and wireless receiving link system Download PDFInfo
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- CN113258949B CN113258949B CN202110675315.6A CN202110675315A CN113258949B CN 113258949 B CN113258949 B CN 113258949B CN 202110675315 A CN202110675315 A CN 202110675315A CN 113258949 B CN113258949 B CN 113258949B
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- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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- 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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
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Abstract
The application relates to a multiplex receiving device, including merit divide the module, control module and energy storage module, the merit divides the module to divide into baseband signal and direct current energy with the signal after the received rectification to send baseband signal to control module and send direct current energy to energy storage module, the energy that carries in the energy storage direct current energy, when energy storage module's voltage is not less than the preset starting voltage that control module corresponds, control module with baseband signal demodulation output peripheral circuit. The whole device can divide the rectified signal into baseband signals and direct current energy, and the direct current energy is stored in the energy storage module, so that multiplexing transmission of information and energy can be realized. In addition, the application also provides a wireless receiving link system comprising the multiplexing receiving device.
Description
Technical Field
The present application relates to the field of communications equipment technologies, and in particular, to a signal-energy multiplexing receiving apparatus and a wireless receiving link system.
Background
Wireless energy transfer in a broad sense is a technology that can collect environmental energy, including thermal energy, solar energy, electromagnetic energy, etc., and convert it into direct current energy. The wireless energy carrying technology generally refers to a technology that uses electromagnetic waves as carriers for information transmission and energy transmission and can simultaneously transmit information and energy, and the technology can be regarded as a combination of wireless communication technology and wireless energy transmission technology.
The research of the wireless energy carrying technology in the academic world continues till now, the research content of the academic world on the wireless energy carrying technology mainly focuses on the aspects of throughput optimization, energy and information ratio optimization, modulation mode optimization and the like of a wireless energy carrying communication system, and a prototype of the wireless energy carrying communication system is rarely made actually by people.
At present, energy collecting circuits for collecting radio frequency energy are mainly related to wireless energy carrying communication systems, and the receiver can realize storage and management of direct current energy passing through a radio frequency rectifying circuit through an energy management chip. However, the energy acquisition circuit cannot realize information demodulation, and the meaning of radio frequency energy wireless transmission is that energy transmission is completed while information is transmitted, and pure information transmission or energy transmission wastes energy.
Disclosure of Invention
In view of the above, it is necessary to provide a signal multiplexing receiving apparatus and a wireless receiving link system that can realize transmission of information and energy.
A signal-energy multiplexing receiving device comprises a power division module, a control module and an energy storage module, wherein the power division module is respectively connected with the control module and the energy storage module;
the power dividing module divides the received rectified signal into a baseband signal and direct current energy, sends the baseband signal to the control module and sends the direct current energy to the energy storage module, the energy storage module stores energy carried in the direct current energy, and when the voltage of the energy storage module is not less than a preset starting voltage corresponding to the control module, the control module demodulates the baseband signal and outputs the baseband signal to the peripheral circuit.
In one embodiment, the signal-energy multiplexing receiving apparatus further includes a first matching resistor and a second matching resistor, the power dividing module is connected to the control module through the first matching resistor, and the power dividing module is connected to the energy storage module through the second matching resistor.
In one embodiment, the signal-energy multiplexing receiving device further includes a boosting module, and the second matching resistor is connected to the energy storage module through the boosting module.
In one embodiment, the boosting module comprises an overcharge-preventing boosting chip, the energy storage module comprises a standby battery and a super capacitor, the standby battery and the super capacitor are respectively connected with the boosting chip, and the control module is connected with the super capacitor and is used for taking electricity from the super capacitor.
In one embodiment, the control module is further configured to demodulate and separate the baseband signal into a display signal, a feedback signal, and a control signal, send the display signal to a display device in the peripheral circuit, send the feedback signal to a feedback device in the peripheral circuit, and send the control signal to a back-end load in the peripheral circuit, where the feedback signal is used to control the feedback device to feed back a receiving-end energy obtaining state to the sending end, and the control signal is used to control whether the back-end load gets power to start.
In one embodiment, the control module is further configured to obtain power consumption corresponding to the display device, the feedback device, and the rear end load, obtain a charging amount of the energy storage module, and control whether the display device, the feedback device, and the rear end load are powered on or off according to the power consumption and the charging amount.
In one embodiment, the power dividing module includes a signal receiving interface, an adjustable power dividing unit, and an impedance matching unit, which are connected in sequence, the signal receiving interface receives the rectified signal, the adjustable power dividing unit divides the rectified signal into a baseband signal and dc energy, and adjusts a ratio of the baseband signal to the dc energy, and the impedance matching unit matches the baseband signal with the rectified signal in impedance.
In one embodiment, the power dividing module includes a signal receiving interface, a first adjustable resistor, a second adjustable resistor, and a third adjustable resistor;
one end of the first adjustable resistor is connected with the signal receiving interface, the other end of the first adjustable resistor is respectively connected with one end of the second adjustable resistor and one end of the third adjustable resistor, the other end of the second adjustable resistor is connected with the energy storage module, and the other end of the third adjustable resistor is grounded;
the signal receiving interface receives the rectified signal, the first adjustable resistor and the second adjustable resistor divide the rectified signal into a baseband signal and direct current energy, and the ratio of the baseband signal to the direct current energy is related to the resistance values of the first adjustable resistor and the second adjustable resistor.
In one embodiment, the power dividing module further includes a diode, and the first adjustable resistor is connected to the energy storage module through the diode.
This application signal can multiplexing receiving arrangement, including merit divide module, control module and energy storage module, the merit divides the signal after will receiving the rectification to divide into baseband signal and direct current energy, and with baseband signal transmission to control module and with direct current energy transmission to energy storage module, the energy that carries among the energy storage direct current energy, when energy storage module's voltage is not less than the preset starting voltage that control module corresponds, control module exports peripheral circuit with baseband signal demodulation. The whole device can divide the signal merit after the rectification into baseband signal and direct current energy, stores the direct current energy to the energy storage module, and only when the voltage in the energy storage module reaches the preset starting voltage, the control module can start the demodulation of the baseband signal, thereby avoiding that the frequent trial demodulation signal leads to energy consumption when the preset starting voltage is not reached, leading to the unable normal demodulation, and realizing the multiplexing transmission of information and energy.
In addition, the application provides a wireless receiving link system, which comprises a receiving component, a rectifying component and the above-mentioned signal energy multiplexing receiving device which are connected in sequence.
This application wireless receiving link system, the signal after the receiving element receives the rectification, the rectification subassembly rectifies the signal after the rectification, and signal transmission after the rectification after with the rectification is to multiplexing receiving arrangement, multiplexing receiving arrangement of signal energy includes the merit and divides the module, control module and energy storage module, the merit divides the signal after the rectification into baseband signal and direct current energy, and with baseband signal transmission to control module and with direct current energy transmission to energy storage module, the energy that carries among the energy storage module storage direct current energy, when the voltage of energy storage module is not less than the preset starting voltage that control module corresponds, control module is with baseband signal demodulation output. The whole system can divide the signal power after rectification into a baseband signal and direct current energy, the direct current energy is stored in the energy storage module, only when the voltage in the energy storage module reaches the preset starting voltage, the control module can start the demodulation of the baseband signal, the problem that the energy is consumed due to frequent trial demodulation signals when the preset starting voltage is not reached is avoided, the normal demodulation is not realized, and the multiplexing transmission of information and energy can be realized.
Drawings
Fig. 1 is a diagram illustrating an application environment of a signal multiplexing receiving device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a signal energy multiplexing receiving device in one embodiment;
fig. 3 is a schematic structural diagram of a signal energy multiplexing receiving device in another embodiment;
FIG. 4 is a schematic circuit diagram of a boost module in another embodiment;
fig. 5 is a schematic structural diagram of a signal multiplexing receiving device in an application example;
FIG. 6 is a schematic diagram of a partial circuit of a microcontroller portion of an embodiment of a multiplexing receiving apparatus;
FIG. 7 is a schematic circuit diagram of a switch chip;
fig. 8 is a schematic circuit diagram of a power dividing module in an embodiment;
FIG. 9 is a schematic diagram of a wireless receive chain system according to an embodiment of the present application;
FIG. 10 is a diagram illustrating an exemplary embodiment of a wireless receive link system;
FIG. 11 is a schematic diagram of energy link control logic;
fig. 12 is a schematic diagram of information link control logic.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
To describe the technical solution and effect of the signal multiplexing receiving apparatus in the present application in detail, first, a brief description will be made on the knowledge about signal transmission (transmission link) and signal reception (reception link) in the wireless communication field.
From the framework of the whole system, to ensure the operation of the whole receiver, two parts, namely a transmitting link and a receiving link, are required, the transmitting link includes a digital module, an analog module and a transmitting antenna, the receiving link includes a receiving antenna, a rectifying circuit and an information energy composite receiver, as shown in fig. 1, the whole operation mechanism is: the digital module modulates signals, the work can be carried out on platforms such as FPGA and the like, the modulated digital signals enter the analog module to be subjected to up-conversion, filtering, signal amplification and other steps to be converted into analog signals which can be transmitted by a transmitting antenna, the transmitting antenna uses electromagnetic waves as a carrier to radiate radio frequency energy carrying the signals to a free space, a receiving antenna receives the radio frequency energy carrying the signals in a corresponding distance, the radio frequency energy enters a radio frequency rectifying circuit and is rectified to output direct current energy carrying baseband signals to a rear-end composite receiver, the composite receiver separates the energy from the information, an information circuit carries out information demodulation, the energy circuit carries out boosting and energy storage, and an energy output end of the composite receiver is connected with a rear-end load to provide energy for the rear-end load.
The utility model provides a multiplexing receiving arrangement of letter energy can be applied to in the application scene that fig. 1 shows, it specifically can replace the compound receiver in fig. 1, in practical application, this application multiplexing receiving arrangement of letter energy includes the merit and divides the module, control module and energy storage module, the merit divides the signal after will rectifying to divide into baseband signal and direct current energy, and send baseband signal to control module and send direct current energy to energy storage module, the energy that carries in the energy storage module storage direct current energy, control module detects the voltage of energy storage module, when voltage is not less than predetermineeing starting voltage, with baseband signal demodulation output.
In an embodiment, as shown in fig. 2, a signal-energy multiplexing receiving apparatus is provided, which includes a power dividing module 110, a control module 120, and an energy storage module 130, where the power dividing module 110 is connected to the control module 120 and the energy storage module 130, the energy storage module 130 is connected to the control module 120, and the control module 120 is connected to a peripheral circuit;
the power dividing module 110 divides the received rectified signal into a baseband signal and dc energy, and sends the baseband signal to the control module 120 and sends the dc energy to the energy storage module 130, the energy storage module 130 stores energy carried in the dc energy, and when the voltage of the energy storage module 130 is not less than a preset starting voltage corresponding to the control module 120, the control module 120 demodulates the baseband signal and outputs the baseband signal to a peripheral circuit.
The power dividing module 110 is configured to divide the rectified signal into a baseband signal and a dc energy, where the baseband signal is a signal (communication signal) to be transmitted, the baseband signal is sent to the control module 120, and the dc energy is sent to the energy storage module 130. The control module 120 demodulates the baseband signal after being started, and may demodulate and separate three types of signals, i.e., a display signal, a feedback signal, and a control signal, where the display signal is used to control display information of a display device in the peripheral circuit, the feedback signal is used to control a feedback device in the peripheral circuit to return a receiving end energy obtaining state to the signal transmitting end, and the signal transmitting end may adjust parameters such as a transmitting position and a transmitting mode according to returned receiving end energy obtaining state data (mainly including a receiving signal voltage value and/or a signal-to-noise ratio, etc.), so that the receiving end (receiving link) receives a signal with better quality. The energy storage module 130 is configured to store energy carried in the dc energy signal, and as the charging time elapses, the voltage in the energy storage module 130 gradually increases, and when the voltage increases to a preset starting voltage corresponding to the control module 120, the control module 120 obtains energy from the energy storage module 130 to work, so as to demodulate the baseband signal. Further, if the energy in the energy storage module 130 is sufficient, the control module 120 may also control other devices (such as the aforementioned display device and feedback device) in the peripheral circuit to take power from the energy storage module 130.
The signal-energy multiplexing receiving device comprises a power dividing module 110, a control module 120 and an energy storage module 130, wherein the power dividing module 110 divides a received rectified signal into a baseband signal and direct current energy, sends the baseband signal to the control module 120 and sends the direct current energy to the energy storage module 130, the energy storage module 130 stores energy carried in the direct current energy, and when the voltage 130 of the energy storage module is not less than a preset starting voltage corresponding to the control module 120, the control module 120 demodulates the baseband signal and outputs the baseband signal to a peripheral circuit. Whole device can divide into baseband signal and direct current energy with the signal merit after the rectification, with direct current energy storage to energy storage module 130, and only when the voltage in energy storage module 130 reaches and predetermines starting voltage, control module 120 just can start the demodulation to the baseband signal, avoids leading to expending the energy in the frequent "trial" demodulation signal when not reaching and predetermine starting voltage, leads to unable normal demodulation, can realize the multiplexing transmission of information and energy.
As shown in fig. 3, in an embodiment, the signal-energy multiplexing receiving apparatus further includes a first matching resistor 140 and a second matching resistor 150, the power dividing module 110 is connected to the control module 120 through the first matching resistor 140, and the power dividing module 110 is connected to the energy storage module 130 through the second matching resistor 150.
The baseband signal enters the control module 120 through an ADC external matching resistor (the first matching resistor 140), specifically enters an ADC sampling port of the control module 120, and is demodulated by the control module 120. The dc energy enters the energy storage module 130 through the second matching resistor 150. Specifically, the dc voltage of the dc energy obtained by the power dividing module 110 is very weak, and the dc energy needs to pass through a matching resistor after being divided, because all devices of the whole receiving system are in an off state at the initial working stage of the receiving end, the overall resistance of the receiving system is very low, but the working optimal resistance point of the front-end rectifying circuit generally has between several hundred ohms and several thousand ohms, so the matching resistor needs to be added to help the rectifying circuit work at the optimal point to maximize the energy conversion efficiency.
As shown in fig. 3, in one embodiment, the above-mentioned signal-energy multiplexing receiving apparatus further includes a voltage boosting module 160, and the second matching resistor 150 is connected to the energy storage module 130 through the voltage boosting module 160.
As mentioned above, the dc voltage of the dc energy is weak, so the boost circuit is needed to boost the voltage to meet the operating voltage requirement of the back-end load. Further, the direct current energy reaches the boosting module 160 after flowing through the second matching resistor 150, the boosting module 160 is configured with a boosting output threshold and a boosting stop threshold in advance through an external hardware configuration circuit, the circuit is prevented from being overcharged, the output end of the boosting module 160 is connected with the energy storage module 130, and the energy storage module 130 can start energy storage when the boosting threshold reaches a certain level.
Further, the energy storage module includes backup battery and super capacitor, and wherein, super capacitor is as the energy storage device of core, and backup battery and super capacitor are connected with the module of stepping up respectively, and the module of stepping up specifically can be the chip of stepping up, and backup battery and super capacitor connect respectively in two different pins on the chip of stepping up.
To explain the related contents of the energy circuit in the energy multiplexing receiving device of the present application in further detail, a specific example will be adopted below, and the description will be made with reference to fig. 4. In this specific example, the boost module is a boost chip, and the energy storage module includes a backup battery and a super capacitor. As shown in fig. 4, the power-divided dc energy is connected to the VIN pin of the boost chip through VCC-in, and the boost chip programs the boost characteristic in the form of an external circuit design, for example, as shown in fig. 4, resistors R5, R6, R7, R8, R12, R14, R15, and R16 connected to setpgg, setsyst can determine the boost threshold of the boost device, the discharge cutoff voltage of the energy storage device, and when to start the backup battery. In fig. 4, C10 and C11 are a backup battery and a super capacitor, respectively, a main energy storage device is a super capacitor, and a boost chip will continuously provide boosted energy for the super capacitor, it should be noted that the capacitance value of the super capacitor cannot be too large, otherwise, the charging will be very slow, but cannot be too small, and if the capacitance value is too small, when an external energy source is lost, the whole device will not run for too long. Specifically, the specific value of the super capacitor is mainly based on the power of the back-end load and the required working time, the energy storage formula of the capacitor is W =1/2CU, where C is the capacitance value number and U is the voltage across the capacitor, and it can be seen from the above formula that the larger C is, the larger U is, but the larger C, U is, the slower the back end of charging is. The control module will get power directly from the super capacitor, as shown in fig. 4 as BAT + pin, when the charging voltage rises to the lowest working voltage of the control module, the control module will start working, in addition, the display device and the feedback device in the peripheral circuit will get power from BAT + but will be controlled by the control module to prevent continuous power consumption.
In one embodiment, the control module is further configured to obtain power consumption corresponding to the display device, the feedback device, and the rear end load, obtain a charging amount of the energy storage module, and control whether the display device, the feedback device, and the rear end load are powered on or off according to the power consumption and the charging amount.
The control module also manages the electric energy of the display equipment, the feedback equipment and the rear-end load contained in the peripheral circuit, so as to avoid that the peripheral equipment consumes excessive electric energy to cause that the whole device can not realize normal communication (demodulation). Particularly, a control circuit can be further arranged between the control module and the rear-end load, the control module outputs an enable signal to control the control circuit so as to control whether the rear-end load is allowed to take power, the control module also directly outputs an enable signal to a display device and a feedback device, and the display device and the feedback device can determine whether the power can be taken from the energy storage module only after receiving the enable signal of the control module.
To further explain the above control process, the following describes the processes of baseband signal demodulation and power control of devices in peripheral circuits in detail with reference to fig. 5 by using specific examples. In this specific application example, the control module is a microcontroller and the energy storage module is an energy storage circuit.
Specifically, as shown in fig. 5, the dc energy flows through the matching resistor and then reaches the voltage boost circuit, the voltage boost circuit configures a boost output threshold and a boost stop threshold in advance through an external hardware configuration circuit to prevent the circuit from overcharging, the output end of the voltage boost circuit is connected to the energy storage circuit, the energy storage circuit can start energy storage when the boost threshold reaches a certain level, the energy storage circuit is directly connected to the microcontroller, the display device and the feedback device, and respectively corresponds to the dc energy a circuit, the dc energy b circuit and the dc energy c circuit, the dc energy a circuit corresponding to the microcontroller will continuously obtain power from the energy storage circuit, when the voltage reaches the lowest working voltage of the microcontroller, the microcontroller starts to work, and it should be noted that the dc energy b circuit and the dc energy c circuit are the direct connection display device and the feedback device, but their work is controlled by the microcontroller, therefore, the condition that the electric appliance is not controlled to take electricity can not occur, and meanwhile, the electricity consumption of the electric appliance at the rear end is directly controlled by the control circuit and does not adopt the form of directly connecting the energy storage circuit.
In one embodiment, the control module is further configured to demodulate and separate the baseband signal into a display signal, a feedback signal, and a control signal, send the display signal to a display device in the peripheral circuit, send the feedback signal to a feedback device in the peripheral circuit, and send the control signal to a back-end load in the peripheral circuit, where the feedback signal is used to control the feedback device to feed back a receiving-end energy obtaining state to a sending end of the rectified signal, and the control signal is used to control whether the back-end load gets power to start or keeps silent.
The control module demodulates and separates the baseband signal into a display signal, a feedback signal and a control signal, wherein the feedback signal is used for the transmitting terminal to acquire the energy acquisition state of the receiving terminal, and further changes the signal of the transmitting mode, the receiver can process the voltage value or the overall signal-to-noise ratio condition of the ADC sampling signal, when the voltage value or the signal-to-noise ratio is high, which indicates that the receiver is located in a large energy coverage area, the current transmission mode should be maintained, when the voltage value or the signal-to-noise ratio is low, the receiver is located at the edge zone covered by the energy, the position or the transmitting mode of the transmitter is adjusted, the corresponding feedback signal needs to be transmitted back through feedback equipment at the rear end, the feedback equipment is of the type LoRa, a wireless module, a Bluetooth module and the like, and the feedback calibration generally only needs to be carried out once and does not need to be in a working state for a long time, so that the energy consumption is low; the display signal is connected to the display equipment, the information content received by the equipment is monitored by the equipment user in real time, and manual intervention can be performed on the receiver at any time; the control signal is a signal for controlling whether the dc energy can supply power to the load, and the load may have the following types of devices: the module is characterized in that in the process of circuit boosting, if a rear-end load is directly connected with an energy storage circuit, energy can be continuously consumed by the rear-end load, if the power of the rear-end load is overlarge, the charging speed is even smaller than the power consumption speed of the rear-end load, at the moment, the booster circuit can be equivalently out of work, and the whole receiving end loses significance.
In a specific application example, the control module may be a microcontroller, the microcontroller and other circuits are configured as shown in fig. 6, the baseband signal after power division reaches an ADC0 port through a matching resistor, the microcontroller can sample the baseband signal input from outside, and divide the baseband signal into a Display signal, a feedback signal, and a control signal according to the signal type, the microcontroller distinguishes the Display signal, the feedback signal, and the control signal after running a code inside the microcontroller, and the Display signal is transmitted to the Display module of the Display device through CS, WR, and DA ports for a monitoring person to view; the relative position state information is input into a Feedback module of the Feedback module through a TXD pin and is transmitted back to the receiving end according to the voltage of the ADC0 sampling signal or the signal-to-noise ratio of the signal, so that the state of the receiving end can be conveniently judged by the transmitting end, and the transmitting mode can be regulated and controlled in real time; the control signal comes from the transmitting terminal, the control module determines whether the devices at the rear ends of JP8, JP9 and JP10 are turned off or not through the enabling terminal of the pin configuration switch chip (the switch chip is specifically shown in fig. 7) after receiving the control command of the transmitting terminal, and meanwhile, under the condition that no external energy is input, in order to prevent the devices from excessively consuming power, the MCU determines the power consumption speed by sampling the voltage value of BAT + super capacitor in real time, and then selectively turns off the devices at the rear ends of JP8, JP9 and JP10, so as to achieve the purpose of saving energy, for example, P6.3/CB3/A3 shown in fig. 6 is a capacitor voltage monitoring pin. Furthermore, a peripheral circuit is arranged around the boost chip and used for controlling parameters such as a capacitor boost threshold value, a voltage output threshold value and the like. The boost chip is provided with a programmable circuit which is used for detecting the voltage in the energy storage module, and when the voltage reaches the preset starting voltage corresponding to the microcontroller, the microcontroller is powered on and started from the energy storage module.
In one embodiment, the power dividing module includes a signal receiving interface, an adjustable power dividing unit, and an impedance matching unit, which are sequentially connected, where the signal receiving interface receives a rectified signal, and the adjustable power dividing unit power divides the rectified signal into a baseband signal and dc energy, and adjusts a ratio of the baseband signal to the dc energy.
The signal receiving interface can be understood as a rectified signal receiving port, the adjustable power division unit is used for realizing power division of the rectified signal, namely, dividing the rectified signal into a baseband signal and direct-current energy, and also supporting adjustment of the ratio of the baseband signal to the direct-current energy, and the impedance matching unit is used for realizing impedance matching between the baseband signal obtained after power division and the rectified signal so as to achieve a higher signal-to-noise ratio.
Specifically, as shown in fig. 8, the power dividing module includes a signal receiving interface JP11, a first adjustable resistor R10, a second adjustable resistor R9, and a third adjustable resistor R11; one end of a first adjustable resistor R10 is connected with the signal receiving interface JP11, the other end of the first adjustable resistor R10 is respectively connected with one end of a second adjustable resistor R9 and one end of a third adjustable resistor R11, the other end of the second adjustable resistor R9 is connected with the energy storage module, and the other end of the third adjustable resistor R11 is grounded; the signal receiving interface JP11 receives the rectified signal, the first adjustable resistor R10 and the second adjustable resistor R9 divide the rectified signal into a baseband signal and direct current energy, the ratio of the baseband signal to the direct current energy is related to the resistance values of the first adjustable resistor R10 and the second adjustable resistor R9, and the third adjustable resistor R11 enables the signal path to be matched with external input in impedance.
The rectified signal is accessed through a JP11 interface shown in fig. 8, the adjustable resistor R9 and the adjustable resistor R10 play a role of power division, the resistance values of the adjustable resistor R9 and the adjustable resistor R10 can be adjusted to determine the ratio of the VCC-in energy circuit to the ADC0 signal circuit, meanwhile, the adjustable resistor R10 and the adjustable resistor R11 can determine the input impedance of the ADC0, and under the condition that the values of the adjustable resistor R10 and the adjustable resistor R9 are determined, the signal circuit can be matched with the external input impedance by adjusting the adjustable resistor R11 to achieve the highest signal-to-noise ratio. It should be noted that the adjustable resistor R9 of the energy circuit not only has a power dividing function, but also can perform a matching function of the energy circuit, because the external rectifying circuit requires a larger resistance value of the load at the rear end, and only the boost device has a small load at the rear end when operating, the rectifying circuit cannot operate at the optimal point, and therefore an additional resistor is required to help the rectifying circuit reach the optimal point, and the adjustable resistor R9 performs this function. Further, since the boost device generally has a voltage stabilizing function, a diode D1, preferably a schottky diode with low forward conducting voltage, must be connected in series at the front end of VCC-in to prevent the voltage stabilizing function of the boost device from affecting the sampling signal value of the ADC circuit.
As shown in fig. 9, the present application further provides a wireless receiving link system, which includes a receiving component 200, a rectifying component 300, and the above-mentioned signal multiplexing receiving apparatus 100, which are connected in sequence.
The wireless receiving link system comprises a receiving component 200, a rectifying component 300, a power division module, a control module and an energy storage module, wherein the rectified signals comprise baseband signals and direct current energy, the rectified signals are sent to the signal energy multiplexing receiving device 100, the signal energy multiplexing receiving device 100 comprises the power division module, the control module and the energy storage module, the power division module divides the rectified signals into the baseband signals and the direct current energy, the baseband signals are sent to the control module and the direct current energy is sent to the energy storage module, the energy storage module stores energy carried in the direct current energy, and when the voltage of the energy storage module is not less than the preset starting voltage corresponding to the control module, the control module demodulates and outputs the baseband signals. The whole system can divide the signal power after rectification into a baseband signal and direct current energy, the direct current energy is stored in the energy storage module, only when the voltage in the energy storage module reaches the preset starting voltage, the control module can start the demodulation of the baseband signal to avoid that the energy is consumed due to frequent trial demodulation of the signal when the preset starting voltage is not reached, so that the normal demodulation cannot be realized, and the multiplexing transmission of information and energy can be realized.
In a specific application example, the wireless receiving link system of the present application may be applied to a scenario as shown in fig. 9, where the signal energy multiplexing receiving apparatus is an integrated receiver, the receiving component is a receiving antenna, the rectifying component is not shown, and the backend load is replaced by a sensing node. In particular, the present invention relates to a method for producing,
fig. 10 is a wireless energy-carrying communication system of a wireless sensor network, in this scenario, a plurality of wireless sensor monitoring devices respectively monitor a backend device, in this application scenario, there are often a large number of wireless sensor nodes, and it is very troublesome to provide electric energy to the sensor nodes by using a wiring or battery-powered manner, because the wiring makes the entire monitoring scenario circuit intensive and vulnerable, and when a battery is used, it is very difficult to manually replace the battery, so a better energy supply method needs to be used. The wireless receiving link system can better solve the problem, and under the scene, the coverage of the whole wireless sensor network area can be completed only by arranging one or more radio frequency energy and signal transmitting units. The transmitting unit radiates energy and signals into the air in an electromagnetic wave mode, the sensing node receives the electromagnetic waves carrying the energy and the signals through the receiving antenna, the electromagnetic waves are separated through the integrated composite receiver, the energy can be stored in an energy storage module of the receiver, information transmitted by the transmitting module can be demodulated and processed by the receiver, and the receiver can execute operation according to the information content of the transmitting module, such as displaying a transmitting instruction, feeding back the state information of the receiver, selecting which devices at the rear end to supply power and the like. It is clear and definite to need, in carrying out practical application in-process, guarantee that energy storage device has certain electric quantity earlier best, can satisfy microcontroller's operating voltage, like this when using for the first time, microcontroller can be according to receiving voltage feedback state information to the transmitting terminal can adjust the transmission mode in real time, feedback work general condition only do once can, the transmitter will store feedback information, follow-up will have corresponding to every node transmission information and energy. When the transmitting module is used for switching off information and energy transmission, the integrated composite receiver can continuously work by using the electric energy stored by the energy storage circuit and monitor the power consumption condition of the energy storage circuit in real time, and when the power consumption is increased, the modules of some sensing nodes can be switched off so as to save energy.
In this application example, the processing logic for the energy link is shown in fig. 11. When energy enters the input end of the boost chip, the boost chip can automatically judge whether the voltage value of the boost chip reaches the starting voltage of the boost chip, if the voltage value of the boost chip does not reach the starting voltage, the boost chip keeps silent, if the voltage value of the boost chip reaches the starting voltage, the boost chip starts to boost, at the moment, the energy storage device also stores electric energy along with the rise of the voltage output by the boost chip, in the process, the boost chip can judge whether the voltage value reaches the boost threshold value according to the voltage set by the hardware configuration circuit at the outer end, if the voltage value does not reach the boost threshold value, the boost chip continues to boost, and if the voltage value reaches the boost threshold value, the voltage value is kept.
The processing logic for the information link (baseband signal) is shown in fig. 12. An ADC samples an input signal and then transmits the input signal to a microcontroller for demodulation, the microcontroller performs information separation according to a coding mode determined together with a transmitting terminal, firstly, whether the state of a receiver needs to be fed back is judged (specifically, the receiver can judge three different signal types in a mode appointed with the transmitter, when the transmitter needs to feed back with the receiver, a corresponding feedback demand signal is sent, the receiver can perform a feedback process after receiving the signal), if so, the receiver feeds back the signal to the transmitter through a feedback module, the transmitter properly adjusts the transmitting mode according to the fed-back information so that the transmission of the information and the energy reaches an optimal value, and if not, the feedback module is kept silent; secondly, judging whether information needing to be displayed exists or not, if so, starting a display module, displaying the information by the display module, and if not, keeping the display module silent; and finally, judging whether a control instruction exists or not, selecting the load needing power supply according to the control instruction to start power supply, and keeping the load silent if the control instruction does not exist. Specifically, the transmitter adjustment process includes: when the transmitter performs spatial scanning, a feedback signal sent by the feedback device is continuously obtained, and the main form of the feedback signal is an average value of sampled voltages in a period of time. After the space scanning is finished, the transmitter polls all feedback results, finds out the beam forming factor corresponding to the maximum value, and adjusts the directional diagram of the transmitting antenna to realize the beam alignment receiver.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. A signal-energy multiplexing receiving device is characterized by comprising a power dividing module, a control module, an energy storage module, a first matching resistor and a second matching resistor, wherein the power dividing module is respectively connected with the control module and the energy storage module;
the power dividing module divides a received rectified signal into a baseband signal and direct current energy, sends the baseband signal to a control module and sends the direct current energy to the energy storage module, the energy storage module stores energy carried in the direct current energy, and when the voltage of the energy storage module is not less than a preset starting voltage corresponding to the control module, the control module demodulates the baseband signal and outputs the baseband signal to the peripheral circuit;
the first matching resistor and the second matching resistor enable the rectifying circuit to work at an optimal point so as to achieve the maximization of energy conversion efficiency;
the power division module comprises a signal receiving interface, a first adjustable resistor, a second adjustable resistor and a third adjustable resistor; one end of the first adjustable resistor is connected with the signal receiving interface, the other end of the first adjustable resistor is respectively connected with one end of the second adjustable resistor and one end of the third adjustable resistor, the other end of the second adjustable resistor is connected with the energy storage module, and the other end of the third adjustable resistor is grounded; the signal receiving interface receives the rectified signal, the first adjustable resistor and the second adjustable resistor divide the rectified signal into a baseband signal and direct current energy, and the ratio of the baseband signal to the direct current energy is related to the resistance values of the first adjustable resistor and the second adjustable resistor.
2. The apparatus of claim 1, further comprising a boost module, wherein the second matching resistor is connected to the energy storage module through the boost module.
3. The device of claim 2, wherein the boost module comprises an overcharge-prevention boost chip, the energy storage module comprises a backup battery and a super capacitor, the backup battery and the super capacitor are respectively connected with the boost chip, and the control module is connected with the super capacitor to take power from the super capacitor.
4. The apparatus according to claim 1, wherein the control module is further configured to demodulate and separate the baseband signal into a display signal, a feedback signal, and a control signal, send the display signal to a display device in a peripheral circuit, send the feedback signal to a feedback device in the peripheral circuit, and send the control signal to a back-end load in the peripheral circuit, where the feedback signal is used to control the feedback device to feed back a receiving-end energy obtaining state to the sending end, and the control signal is used to control whether the back-end load gets power to start.
5. The apparatus according to claim 4, wherein the control module is further configured to obtain power consumption corresponding to the display device, the feedback device, and the back-end load, obtain a charging amount of the energy storage module, and control whether to start or not to start the display device, the feedback device, and the back-end load according to the power consumption and the charging amount.
6. The apparatus of claim 1, wherein the power dividing module further comprises a diode, and the first adjustable resistor is connected to the energy storage module through the diode.
7. A wireless receiving link system, characterized in that it comprises a receiving component, a rectifying component and the signal multiplexing receiving device of any one of claims 1-6 connected in sequence.
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| CN202110675315.6A CN113258949B (en) | 2021-06-18 | 2021-06-18 | Signal-energy multiplexing receiving device and wireless receiving link system |
| PCT/CN2021/141649 WO2022262249A1 (en) | 2021-06-18 | 2021-12-27 | Information and energy multiplexing receiving apparatus and wireless receiving link system |
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