WO2022262249A1 - Information and energy multiplexing receiving apparatus and wireless receiving link system - Google Patents

Abstract

The present application relates to an energy multiplexing receiving apparatus, comprising a power division module, a control module, and an energy storage module, wherein the power division module divides a 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 same to a peripheral circuit. Further provided in the present application is a wireless receiving link system comprising the energy multiplexing receiving apparatus.

Description

Signal multiplexing receiving device and wireless receiving link system

Cross References to Related Applications

This application claims the priority of the Chinese application filed on June 18, 2021, entitled "Signal Energy Multiplexing Receiving Device and Wireless Receiving Link System", with application number 2021106753156, the disclosure of which is fully incorporated by reference in this application middle.

technical field

The present application relates to the technical field of communication equipment, in particular to a signal energy multiplexing receiving device and a wireless receiving link system.

Background technique

Wireless energy transmission is a technology that can collect environmental energy and convert it into DC energy, where environmental energy includes thermal energy, solar energy, electromagnetic energy, etc. Wireless energy carrying technology refers to the technology that uses electromagnetic waves as the carrier of information transmission and energy transmission, and can simultaneously transmit information and energy. This technology can be regarded as a combination of wireless communication technology and wireless energy transmission technology.

At present, the research on wireless energy carrying technology mainly focuses on the optimization of the throughput of the wireless energy carrying communication system, the optimization of energy and information ratio, the optimization of the modulation mode of the wireless energy carrying communication system, etc., and less involves the prototype of the wireless energy carrying communication system.

Contents of the invention

The present application provides a signal multiplexing receiving device and a wireless receiving link system.

A signal energy multiplexing receiving device, comprising a power division module, a control module and an energy storage module, the power division module is connected to the control module and the energy storage module respectively, the energy storage module is connected to the control module, and the control module is connected to a peripheral circuit;

The power dividing module divides the received rectified signal into baseband signal and DC energy, sends the baseband signal to the control module and sends the DC energy to the energy storage module, and the energy storage module stores the energy carried in the DC energy. When the voltage of the energy module is not less than the preset startup voltage corresponding to the control module, the control module demodulates the baseband signal and outputs it to the peripheral circuit.

In one of the embodiments, the above-mentioned signal energy multiplexing receiving device 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 through the second matching resistor module connection.

In one of the embodiments, the signal energy multiplexing receiving device further includes a boost module, and the second matching resistor is connected to the energy storage module through the boost module.

In one of the embodiments, the boost module includes an overcharge-proof boost chip, the energy storage module includes a backup battery and a super capacitor, the backup battery and the super capacitor are respectively connected to the boost chip, and the control module is connected to the super capacitor. Take electricity from the capacitor.

In one of the embodiments, the control module is also used to demodulate and separate the baseband signal into a display signal, a feedback signal and a control signal, send the display signal to the display device in the peripheral circuit, and send the feedback signal to the display device in the peripheral circuit. The feedback device sends a control signal to the back-end load in the peripheral circuit. The feedback signal is used to control the feedback device to feed back the energy acquisition status of the receiving end to the transmitter. The control signal is used to control whether the back-end load is powered to start.

In one of the embodiments, the control module is also used to obtain the power consumption corresponding to the display device, the feedback device, and the back-end load, and obtain the charging amount of the energy storage module, and control the display device and the feedback device according to the power consumption and charging amount And whether the back-end load takes power to start.

In one of the embodiments, the power dividing module includes a signal receiving interface connected in sequence, an adjustable power dividing unit and an impedance matching unit, the signal receiving interface receives the rectified signal, and the adjustable power dividing unit divides the rectified signal power into baseband signal and DC energy, and adjust the ratio of the baseband signal and DC energy, and the impedance matching unit makes the baseband signal and the rectified signal impedance match.

In one of the embodiments, the power dividing module includes a signal receiving interface, a first adjustable resistance, a second adjustable resistance and a third adjustable resistance;

One end of the first adjustable resistor is connected to the signal receiving interface, the other end of the first adjustable resistor is respectively connected to one end of the second adjustable resistor and one end of the third adjustable resistor, and the other end of the second adjustable resistor is connected to the storage 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 power into baseband signal and DC energy. The resistance value of the two adjustable resistors is related.

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.

In one of the embodiments, when the voltage of the energy storage module is not less than a second predetermined value, the control module controls the display device and the feedback device in the peripheral circuit to take power from the energy storage module to work, and the second predetermined value is greater than the preset start-up voltage .

In one of the embodiments, the energy storage module is respectively connected with the control module, the display device and the feedback device, and the energy of the energy storage module is supplied to the control module, the display device and the feedback device respectively.

In one of the embodiments, the feedback signal includes the voltage value and/or signal-to-noise ratio of the received signal at the receiving end, and when the voltage value or the signal-to-noise ratio is lower than a third predetermined value, the transmitting end is made to adjust the transmission mode or change the transmission mode in the transmitting end. The location of the transmitter.

In one embodiment, a boost peripheral circuit is arranged around the boost chip, and the boost peripheral circuit is used to control the boost stop threshold and/or the boost output threshold.

In addition, the present application provides a wireless receiving link system, including a receiving component, a rectifying component, and the above-mentioned signal multiplexing receiving device connected in sequence.

The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below. Other features, objects and advantages of the present application will be apparent from the description, drawings and claims.

Description of drawings

FIG. 1 is an application environment diagram of a signal multiplexing receiving device of the present application in an embodiment;

FIG. 2 is a schematic structural diagram of a signal energy multiplexing receiving device in an embodiment;

Fig. 3 is a schematic structural diagram of a signal multiplexing receiving device in another embodiment;

FIG. 4 is a schematic diagram of a circuit principle of a boost module in another embodiment;

Fig. 5 is a structural schematic diagram of a signal energy multiplexing receiving device in an application example;

Fig. 6 is a schematic diagram of the partial circuit principle of the microcontroller part of the signal energy multiplexing receiving device in an application example;

7 is a schematic diagram of the circuit principle of the switch chip;

Fig. 8 is a schematic diagram of the circuit principle of the power dividing module in an embodiment;

FIG. 9 is a schematic structural diagram of the wireless receiving link system of the present application in an embodiment;

FIG. 10 is a schematic diagram of an application environment of the wireless receiving link system of the present application in an embodiment;

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 purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

At present, the wireless energy carrying communication system is mainly related to the energy harvesting circuit of radio frequency energy harvesting. The receiver can realize the storage and management of the DC energy passing through the radio frequency rectification circuit through the energy management chip. However, this energy harvesting circuit cannot demodulate information. In fact, the significance of radio frequency energy wireless transmission is to complete energy transmission while transmitting information. Simply transmitting information or energy is a waste of energy.

Based on this, the present application provides a signal multiplexing receiving device and a wireless receiving link system capable of transmitting information and energy.

In order to describe the technical solutions and effects of the signal multiplexing receiving device of the present application in detail, the following will briefly introduce the related knowledge of signal transmission (transmission link) and signal reception (reception link) in the field of wireless communication.

From the perspective of the overall system framework, to ensure the operation of the entire receiver, two parts, the transmitting link and the receiving link, are required. The transmitting link includes digital modules, analog modules and transmitting antennas, and the receiving link includes receiving antennas, rectifiers Circuit and information energy composite receiver, as shown in Figure 1, the overall operating mechanism is: the digital module modulates the signal, this work can be carried out on platforms such as FPGA, and the modulated digital signal enters the analog module for up-conversion, After filtering, signal amplification and other steps, it becomes an analog signal that can be transmitted by the transmitting antenna. The transmitting antenna uses electromagnetic waves as the carrier to radiate the RF energy carrying the signal to free space, and the receiving antenna receives the RF energy carrying the signal within a corresponding distance. The radio frequency energy enters the radio frequency rectification circuit, and after rectification, the DC energy carrying the baseband signal is output to the back-end composite receiver. The composite receiver separates the energy from the information, the information path performs information demodulation, and the energy path performs boosting and energy storage , the energy output terminal of the composite receiver is connected to the back-end load to provide energy for the back-end load.

The signal energy multiplexing receiving device provided by this application can be applied to the application scenario shown in Figure 1, and it can specifically replace the composite receiver in Figure 1. In practical applications, the signal energy multiplexing receiving device of this application includes a power division Module, control module and energy storage module, the power division module divides the rectified signal into baseband signal and DC energy, sends the baseband signal to the control module and sends the DC energy to the energy storage module, and the energy storage module stores the DC energy The control module detects the voltage of the energy storage module, and when the voltage is not less than the preset start-up voltage, the baseband signal is demodulated and output.

In one embodiment, as shown in FIG. 2 , a signal energy multiplexing receiving device is provided, including a power division module 110, a control module 120 and an energy storage module 130, and the power division module 110 is connected to the control module 120 and the energy storage module respectively. The module 130 is connected, the energy storage module 130 is connected with the control module 120, and the control module 120 is connected with the peripheral circuit;

The power dividing module 110 divides the received rectified signal into 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, and the energy storage module 130 stores the DC energy carried energy, when the voltage of the energy storage module 130 is not less than the preset startup voltage corresponding to the control module 120, the control module 120 demodulates the baseband signal and outputs it to the peripheral circuit.

The power division module 110 is used to divide the rectified signal into baseband signal and DC energy, wherein the baseband signal is the 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 startup, which can demodulate and separate three types of signals: display signal, feedback signal and control signal, wherein the display signal is used to control the display information of the display device in the peripheral circuit, and the feedback signal is used to control The feedback device in the peripheral circuit returns the energy acquisition status of the receiving end to the signal transmitting end, and the signal transmitting end can adjust the transmitting position, Transmission mode and other parameters, so that the receiving end (receiving link) can receive better quality signals. The energy storage module 130 is used to store the energy carried in the DC energy signal. As the charging time goes by, the voltage in the energy storage module 130 gradually increases. When it reaches the preset start-up voltage corresponding to the control module 120, the control module 120 takes energy from the energy storage module 130 to demodulate the baseband signal. Further, if the energy in the energy storage module 130 is sufficient (for example, the voltage in the energy storage module 130 exceeds a second predetermined value, and the second predetermined value is greater than the preset start-up voltage), the control module 120 can also control other devices in the peripheral circuit ( For example, the above-mentioned display device, feedback device, etc.) obtain power from the energy storage module 130 to work.

The signal energy multiplexing receiving device of this application includes a power division module 110, a control module 120, and an energy storage module 130. The power division module 110 divides the received rectified signal into a baseband signal and DC energy, and sends the baseband signal to The control module 120 sends the DC energy to the energy storage module 130, and the energy storage module 130 stores the energy carried in the DC energy. When the voltage 130 of the energy storage module is not less than the preset start-up voltage corresponding to the control module 120, the control module 120 will Baseband signal demodulation output peripheral circuit. The whole device can divide the rectified signal power into baseband signal and DC energy, store the DC energy in the energy storage module 130, and only when the voltage in the energy storage module 130 reaches the preset start-up voltage, the control module 120 will start the pair of Baseband signal demodulation avoids energy consumption caused by frequent "trial" demodulation signals when the preset start-up voltage is not reached, resulting in failure to demodulate normally, and multiplex transmission of information and energy can be realized.

As shown in FIG. 3 , in one embodiment, the above-mentioned signal multiplexing receiving device further includes a first matching resistor 140 and a second matching resistor 150, and the power dividing module 110 is connected to the control module 120 through the first matching resistor 140, 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 the first matching resistor 140 . Specifically, the first matching resistor 140 is an external matching resistor of the ADC, and the baseband signal specifically enters the ADC sampling port of the control module 120 , and the control module 120 demodulates the baseband signal. The DC energy enters the energy storage module 130 through the second matching resistor 150 . Specifically, the DC voltage of the DC energy obtained through the power dividing module 110 is very weak, and after the DC energy is divided, it needs to pass through a matching resistor first, because at the initial stage of the receiving end, all the components of the entire receiving system are turned off State, the overall resistance of the receiving system is very low, but the optimal resistance point of the front-end rectification circuit is generally between several hundred ohms and several thousand ohms, so it is necessary to add matching resistors to help the rectification circuit work at the optimum point to achieve energy conversion Maximize efficiency.

As shown in FIG. 3 , in one embodiment, the signal energy multiplexing receiving device further includes a boost module 160 , and the second matching resistor 150 is connected to the energy storage module 130 through the boost module 160 .

As mentioned above, the DC voltage of the DC energy is very weak, so a booster module is needed to assist in boosting the voltage so that the voltage can meet the working voltage requirements of the back-end load. Further, the DC energy flows through the second matching resistor 150 and reaches the boost module 160. The boost module 160 pre-configures the boost output threshold and the boost stop threshold through the external hardware configuration circuit to prevent the circuit from overcharging. The boost module 160 The output end of the booster module 160 is connected to the energy storage module 130, and the energy storage module 130 can start to store energy when the voltage output by the booster module 160 reaches a certain level.

Further, the energy storage module includes a backup battery and a supercapacitor, wherein the supercapacitor is used as the core energy storage device, and the backup battery and the supercapacitor are respectively connected to the boost module. The boost module can specifically be a boost chip, a backup battery and a super capacitor. The capacitors are respectively connected to two different pins on the boost chip.

In a specific embodiment, the power dividing module 110, the control module 120, the energy storage module 130 and the boost module 160 mentioned above may be implemented by dedicated hardware (such as an electronic circuit). Furthermore, the power dividing module 110 may be, for example, a power divider, the control module 120 is, for example, a controller, a microcontroller or a control chip, the energy storage module 130 is, for example, an energy storage circuit, and the boost module 160 is, for example, a boost circuit.

In order to further explain in detail the relevant content of the energy path in the signal energy multiplexing receiving device of the present application, a specific example will be used below, and the description will be expanded 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 supercapacitor. As shown in Figure 4, the DC energy after power division is connected to the VIN pin of the boost chip through VCC-in, and the boost chip programs the boost characteristics in the form of external circuit design, as shown in Figure 4, SETSD, SETBK, The resistors R5, R6, R7, R8, R12, R14, R15, and R16 connected to TERM, SETPG, and SETHYST can determine the boost stop threshold of the boost device, the discharge cut-off voltage of the energy storage device, and when to use the backup battery. Enabling the above functions will allow the boost chip to operate according to the preset state without external control. In Figure 4, C10 and C11 are backup batteries and supercapacitors respectively. The main energy storage device is a supercapacitor. The boost chip will continue to provide boosted energy for the supercapacitor. It should be noted that the capacitance value of the supercapacitor should not be too large. Otherwise, the charging will be very slow, but it should not be too small. If it is too small, the entire device will not be able to run for too long when the external energy source is lost. 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 ² , where C is the value of the capacitor, and U is the voltage across the capacitor. It can be seen from the above formula that the larger C is, the larger the energy storage is, and the larger U is, the larger the energy storage is. However, the larger C and U are, the later charging will be very slow. The control module will take power directly from the supercapacitor, as shown in the BAT+ pin in Figure 4. When the charging voltage rises to the minimum operating voltage of the control module, the control module will start to work. In addition, the display device and feedback in the peripheral circuit The device will also draw power from BAT+, but it will be controlled by the control module to prevent it from continuously consuming power.

In one of the embodiments, the control module is also used to obtain the power consumption corresponding to the display device, the feedback device, and the back-end load, and obtain the charging amount of the energy storage module, and control the display device and the feedback device according to the power consumption and charging amount And whether the back-end load takes power to start.

The control module also manages the power of the display devices, feedback devices and back-end loads contained in the peripheral circuits, so as to prevent these peripheral devices from consuming too much power and causing the entire device to fail to achieve normal communication (demodulation). Specifically, a control circuit can also be provided between the control module and the back-end load, and the control module outputs an enable signal to control the control circuit to control whether the back-end load is allowed to take power, and the control module also directly outputs the enable signal to the display device and the feedback device, the display device and the feedback device determine whether they can take power from the energy storage module only after receiving the enable signal from the control module.

In order to further illustrate the above control process, a specific example will be used below, and the process of baseband signal demodulation and device power acquisition control in peripheral circuits will be introduced in detail in conjunction with FIG. 5 . 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 Figure 5, the DC energy flows through the matching resistor and reaches the boost circuit. The boost circuit pre-configures the boost output threshold and the boost stop threshold through the external hardware configuration circuit to prevent the circuit from being overcharged. The output of the boost circuit The energy storage circuit will start to store energy when the voltage output by the booster module reaches a certain level. The energy storage circuit will be directly connected to the microcontroller, display device, and feedback device, respectively corresponding to the DC energy a circuit, DC energy circuit b, DC energy circuit C, the corresponding DC energy channel a of the microcontroller will continue to take power from the energy storage circuit, when the voltage reaches the minimum operating voltage of the microcontroller, the microcontroller starts to work, and attention should be paid Although the DC energy circuit B and the DC energy circuit C are directly connected to the display device and the feedback device, whether they work or not will be controlled by the microcontroller, so there will be no uncontrolled power consumption of electrical appliances, and at the same time The power consumption of end-use appliances is directly controlled by the control circuit and does not take the form of direct connection to the energy storage circuit.

In one of the embodiments, the control module is also used to demodulate and separate the baseband signal into a display signal, a feedback signal and a control signal, send the display signal to the display device in the peripheral circuit, and send the feedback signal to the display device in the peripheral circuit. Feedback device and send the control signal to the back-end load in the peripheral circuit. The feedback signal is used to control the feedback device to feed back the energy acquisition state of the receiving end to the transmitter of the rectified signal. The control signal is used to control whether the back-end load takes power Start or remain silent.

The control module demodulates and separates the baseband signal into a display signal, a feedback signal and a control signal. The feedback signal is a signal used by the transmitter to obtain the energy acquisition status of the receiver, and then the transmitter changes the transmission mode based on the feedback signal. The receiver can process the voltage value or the overall signal-to-noise ratio of the ADC sampling signal. When the voltage value or the signal-to-noise ratio is high (for example, higher than the third predetermined value), it means that the receiver is located in a large energy coverage area and should be kept In the current transmission method, when the voltage value or signal-to-noise ratio is low (for example, lower than the third predetermined value), it means that the receiver is located at the edge of energy coverage, and the position of the transmitter or the transmission method should be adjusted, and the corresponding feedback signal It needs to be transmitted back through the back-end feedback device. The types of feedback devices include LoRa (Long Range Radio, long-distance radio), wireless module, Bluetooth module, etc. It should be noted that feedback calibration generally only needs to be performed once, and does not need to be in the work for a long time state, so the energy consumption is small; the display signal is connected to the display device, and the device user can monitor the information received by the device in real time, and can manually intervene on the receiver at any time; the control signal is to control whether the DC energy can supply power to the load The signal that the load may have is: sensor equipment, monitoring equipment, control equipment and other electrical appliances. The significance of this module setting is that in the process of circuit boosting, if the back-end load is directly connected to the energy storage circuit, Energy will continue to be consumed by the back-end load. If the power of the back-end load is too large, the charging speed is even slower than the power consumption speed of the back-end load. At this time, the boost circuit can be equivalent to not working, and the entire receiving end is meaningless. , so this application first ensures that the boost circuit can make the microcontroller work, and then the microcontroller manages whether the back-end load is working through the control circuit, and at the same time, when the energy consumption is too large, some electrical appliances are turned off in time to ensure the normal operation of the entire receiver run.

In a specific application example, the control module can be a microcontroller. The specific structure of the microcontroller and other circuits is shown in Figure 6. The baseband signal after power division reaches the ADC0 port through the matching resistor, and the microcontroller can control the external input The baseband signal is sampled and divided into display signal, feedback signal and control signal according to the type of signal. After running the code inside the microcontroller, the display signal, feedback signal and control signal will be distinguished. The display signal passes through CS, WR and DA. The port is transmitted to the Display module of the display device for viewing by the monitoring personnel; it is judged according to the voltage level of the ADC0 sampling signal or the signal-to-noise ratio of the signal, and the relative position status information is input to the Feedback module through the TXD pin and returned to the receiver end, which is convenient for the transmitter to judge the status of the receiver, so as to adjust the transmission mode in real time; the control signal comes from the transmitter, and after the control module receives the control command from the transmitter, it configures the switch chip through the pins (see Figure 7 for details of the switch chip). The energy terminal determines whether the devices at the back end of JP8, JP9, and JP10 are turned off. At the same time, in the absence of external energy input, in order to prevent excessive power consumption of the device, the MCU will sample the voltage value of the BAT+ super capacitor in real time to determine the power consumption speed, and then select Turn off the devices at the back end of JP8, JP9, and JP10 to achieve the purpose of energy saving. P6.3/CB3/A3 shown in Figure 6 is the capacitor voltage monitoring pin. Further, a boost peripheral circuit is provided around the boost chip, and the boost peripheral circuit is used to control parameters such as a boost stop threshold, a boost output threshold, and the like. That is, the boost chip is provided with a programmable circuit, which is used to detect the voltage in the energy storage module. When the voltage reaches the preset start-up voltage corresponding to the microcontroller, the microcontroller takes the energy from the energy storage module. electric start.

In one of the embodiments, the power dividing module includes a signal receiving interface connected in sequence, an adjustable power dividing unit and an impedance matching unit, the signal receiving interface receives the rectified signal, and the adjustable power dividing unit divides the rectified signal power into Baseband signal and DC energy, and adjust the ratio of baseband signal and DC energy.

The signal receiving interface can be understood as the rectified signal receiving port. The adjustable power division unit is used to realize the power division of the rectified signal, which is divided into baseband signal and DC energy, and also supports the ratio of baseband signal and DC energy Adjustment, the impedance matching unit is used to achieve impedance matching between the baseband signal obtained after power division and the rectified signal, so as to achieve a higher signal-to-noise ratio.

The above-mentioned adjustable power dividing unit and impedance matching unit can be realized by special hardware (such as electronic circuit).

Specifically, as shown in Figure 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 the first adjustable resistor R10 is connected to the signal The receiving interface JP11 is connected, the other end of the first adjustable resistor R10 is respectively connected to one end of the second adjustable resistor R9 and one end of the third adjustable resistor R11, and the other end of the second adjustable resistor R9 is connected to the energy storage module, 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 power into baseband signal and DC energy, the baseband signal The ratio of the DC energy to the DC 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 makes the signal path and the external input achieve impedance matching.

The rectified signal is connected through the JP11 interface shown in Figure 8. The second adjustable resistor R9 and the first adjustable resistor R10 play the role of power division. Adjusting the resistance of R9 and R10 can determine the VCC-in energy path The ratio of the ADC0 signal path, while the first adjustable resistor R10 and the third adjustable resistor R11 can determine the input impedance of ADC0, in the case of determining the value of the first adjustable resistor R10 and the second adjustable resistor R9, By adjusting the third adjustable resistor R11, the signal path can be matched with the external input impedance to achieve the highest signal-to-noise ratio. It should be pointed out that the second adjustable resistor R9 of the energy circuit not only has the function of power division, but also can play the role of matching the energy circuit, because the external rectification circuit requires a large resistance value of the back-end load, and only the boost device When working, the load at the back end is very small, which makes the rectifier circuit unable to work at the optimum point, so an additional resistor is needed to help the rectifier circuit reach the optimum point, and the second adjustable resistor R9 plays this role. Furthermore, because boost devices generally have a voltage stabilizing function, a diode D1 must be connected in series in front of VCC-in. Preferably, a Schottky diode with low forward conduction voltage is used to prevent the voltage stabilizing function of the boost device from being affected. The sampling signal value of the ADC channel.

As shown in FIG. 9 , the present application also provides a wireless receiving link system, including a receiving component 200 , a rectifying component 300 , and the above-mentioned signal multiplexing receiving device 100 connected in sequence.

In the wireless receiving link system of this application, the receiving component 200 receives the wireless signal, and the rectifying component 300 rectifies the wireless signal. The rectified signal contains baseband signal and DC energy, and the rectified signal is sent to the signal energy complex. Using the receiving device 100, the signal energy multiplexing receiving device 100 includes a power division module, a control module and an energy storage module. The power division module divides the rectified signal into a baseband signal and a DC energy, and sends the baseband signal to the control module and The DC energy is sent to the energy storage module, and the energy storage module stores the energy carried in the DC energy. 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 the baseband signal and outputs it. The whole system can divide the rectified signal power into baseband signal and DC energy, and store the DC energy in the energy storage module. Only when the voltage in the energy storage module reaches the preset start-up voltage, the control module will start to decompose the baseband signal. The modulation avoids energy consumption caused by frequent "trial" demodulation signals when the preset start-up voltage is not reached, resulting in the failure of normal demodulation, 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 can be applied to the scenario shown in Figure 9. In this specific application scenario, the signal energy multiplexing receiving device is an integrated composite receiver, and the receiving component is a receiving antenna. Components are not shown, and the back-end loads are replaced by sensor nodes.

Figure 10 is a wireless energy-carrying communication system of a wireless sensor network. In this scenario, there will be multiple wireless sensor monitoring devices to monitor the back-end devices respectively. In this application scenario, there are often a lot of wireless sensor nodes Yes, it will be very troublesome if wiring or battery power supply is used to provide power for sensor nodes, because wiring will make the entire monitoring scene dense and easily damaged. If using batteries, it is very difficult to manually replace batteries, so you need to use better energy supply method. The wireless receiving link system of this application can better solve this problem. In this scenario, only one or a few radio frequency energy and signal transmitting units need to be deployed to complete the coverage of the entire wireless sensor network area. The transmitting unit (such as a transmitter) radiates energy and signals into the air in the form of electromagnetic waves. The sensor node receives the electromagnetic waves carrying energy and signals through the receiving antenna, and then separates them through the integrated composite receiver. The energy will be stored in the receiver. The information transmitted by the energy storage module and the transmitting module will be demodulated and processed by the receiver, and the receiver will perform operations according to the information content of the transmitting module, such as displaying the transmitting command, feeding back the status information of the receiver, and selecting which devices to supply power to the back-end, etc. It needs to be clear that in the actual application process, it is best to ensure that the energy storage device has a certain amount of power, which can meet the operating voltage of the microcontroller, so that when it is used for the first time, the microcontroller can feed back status information according to the received voltage, so that the transmitter can Adjust the transmission mode in real time, and the feedback work is usually only done once. The transmitter will store the feedback information, and then will transmit information and energy to each node in a targeted manner. When the transmitting module turns off the transmission of information and energy, the integrated composite receiver will continue to work using the electric energy stored in the energy storage circuit, and monitor the power consumption of the energy storage circuit in real time. When the power consumption increases, some sensors can be turned off Node's module for energy saving.

In this application example, the processing logic for the energy link is shown in Figure 11. When energy enters the input terminal of the boost chip, the boost chip will judge whether its voltage has reached its start-up voltage. If it does not reach the start-up voltage, it will keep silent. As the voltage output by the boost chip rises to store electric energy, the boost chip will judge whether it has reached the boost stop threshold according to the voltage set by the external hardware configuration circuit during this process. If it does not reach the boost stop threshold, it will continue to boost the voltage. When the boost stop threshold is reached, the voltage value is maintained.

The processing logic for the information link (baseband signal) is shown in FIG. 12 . After the ADC samples the input signal, it is sent to the microcontroller for demodulation. The microcontroller will separate the information according to the encoding method determined jointly with the transmitter. Specifically, the receiver can judge different signals through the agreement with the transmitter. Types such as feedback signals, display signals, and control signals. First, it is judged according to the feedback signal whether it is necessary to feed back the status of the receiver. For example, when the transmitter needs to feedback with the receiver, it will send the corresponding feedback demand signal, and the receiver can perform the feedback process after receiving the signal. If it is necessary to feed back the state of the receiver, it will feed back to the transmitter through the feedback module, and the transmitter will properly adjust the transmission mode according to the information fed back so that the transmission of information and energy reaches the optimal value. If it is not necessary to feed back the state of the receiver, then keep the feedback module Silence; secondly, judge whether there is information to be displayed according to the display signal, and if so, start the display module, and the information will be displayed by the display module; otherwise, keep the display module silent; finally judge whether there is a control command according to the control signal, and Select the load that needs power supply to start supplying power, otherwise, keep the load silent. Specifically, the above transmitter adjustment process is: when the transmitter performs spatial scanning, it will continuously obtain the feedback signal sent by the feedback device, and its main form is the average value of the sampled voltage within a period of time. After completing the spatial scan, the transmitter will poll all the feedback results, find out the beamforming factor corresponding to the maximum value, adjust the pattern of the transmitting antenna and then realize the beam alignment to the receiver.

The technical features of the above embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be It is considered to be within the range described in this specification.

The above examples only express several implementation modes of the present application, and the description thereof is relatively specific and detailed, but should not be construed as limiting the patent scope of the present application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of protection of the patent application should be based on the appended claims.

Claims (14)

A signal energy multiplexing receiving device, which is located at the receiving end of wireless communication and includes a power division module, a control module, and an energy storage module, the power division module is respectively connected to the control module and the energy storage module, and the The energy storage module is connected to the control module, and the control module is connected to the peripheral circuit; The power dividing module divides the received rectified signal into baseband signal and DC energy, and sends the baseband signal to the control module, and sends the DC energy to the energy storage module, and the energy storage The module stores the energy carried in the DC energy, and when the voltage of the energy storage module is not less than the preset startup voltage corresponding to the control module, the control module demodulates the baseband signal and outputs it to the peripheral circuit . The device according to claim 1, further comprising 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 control module through the The second matching resistor is connected to the energy storage module. The device according to claim 2, further comprising a boost module, the second matching resistor is connected to the energy storage module through the boost module. The device according to claim 3, wherein the boost module includes an overcharge-proof boost chip, and the energy storage module includes a backup battery and a supercapacitor, and the backup battery and the supercapacitor are respectively connected to the The boost chip is connected, the control module is connected with the supercapacitor, and takes power from the supercapacitor. The device according to claim 1, wherein the control module is further used to demodulate and separate the baseband signal into a display signal, a feedback signal and a control signal, and send the display signal to a display device in a peripheral circuit , sending the feedback signal to the feedback device in the peripheral circuit, and sending the control signal to the back-end load in the peripheral circuit, the display signal is used to control the display device to display information, and the feedback signal is used The control feedback device feeds back the energy acquisition status of the receiving end to the transmitting end of the wireless communication, and the control signal is used to control whether the back-end load is powered to start. The device according to claim 5, wherein the control module is further used to obtain the power consumption corresponding to the display device, the feedback device, and the back-end load, and to obtain the charging amount of the energy storage module and controlling whether the display device, the feedback device, and the back-end load are powered on according to the power consumption and the charging amount. The device according to claim 1, wherein the power dividing module includes a signal receiving interface, an adjustable power dividing unit and an impedance matching unit connected in sequence, the signal receiving interface receives the rectified signal, and the adjustable power The sub-unit divides the rectified signal power into a baseband signal and DC energy, and adjusts a ratio between the baseband signal and the DC energy. The device according to claim 1, wherein 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 to the signal receiving interface, and the other end of the first adjustable resistor is respectively connected to 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 to 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 power into baseband signal and DC energy, the baseband signal and the The ratio of the DC energy is related to the resistance values of the first adjustable resistor and the second adjustable resistor. The device according to claim 8, wherein the power dividing module further includes a diode, and the first adjustable resistor is connected to the energy storage module through the diode. The device according to claim 1, wherein, when the voltage of the energy storage module is not less than a second predetermined value, the control module controls the display device and the feedback device in the peripheral circuit to obtain energy from the energy storage module. Electric operation, the second predetermined value is greater than the preset start-up voltage. The device according to claim 5, wherein the energy storage modules are respectively connected to the control module, the display device and the feedback device, and the energy of the energy storage modules is respectively supplied to the control module, the display device, and the feedback device. The display device and the feedback device. The device according to claim 5, wherein the feedback signal comprises a voltage value and/or a signal-to-noise ratio of a received signal at the receiving end, and when the voltage value or the signal-to-noise ratio is lower than a third predetermined value , causing the transmitting end to adjust the transmitting mode or change the position of the transmitter in the transmitting end. The device according to claim 4, wherein a boost peripheral circuit is arranged around the boost chip, and the boost peripheral circuit is used to control a boost stop threshold and/or a boost output threshold. A wireless receiving link system, which includes sequentially connected receiving components, rectifying components and the signal energy multiplexing receiving device according to any one of claims 1-13.

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