Wireless power supply system for distributed sensor

Abstract

The utility model relates to a wireless power supply system for a distributed sensor, which comprises a transmitting end and a plurality of receiving ends, the transmitting end comprises a microwave source, a power amplifier module and a microstrip patch transmitting antenna, the half-power field angle alpha of the microstrip patch transmitting antenna meets the following condition: tan (alpha / 2) is greater than or equal to phi / 2d, d is the distance between the transmitting end and the receiving end, and the distance between the transmitting end and the receiving end is greater than or equal to phi / 2d. Phi is the transmission range of the transmitting antenna at the distance d; the sensor units are distributed in the transmission range with the phi as the diameter, and each sensor unit is connected with a receiving end. According to the utility model, non-contact power supply of the distributed sensor is realized, certain offset tolerance is provided, complete alignment is not needed during wireless power supply, and the operation difficulty in the arrangement process of the distributed sensor is reduced. According to the utility model, non-contact power supply of multiple distributed sensors by one transmitting end is realized, and wireless power supply of multiple sensors can be realized in a certain spatial range.

Description

Technical Field

[0001] This utility model belongs to the field of wireless power supply technology, and specifically relates to a wireless power supply system for distributed sensors. Background Technology

[0002] Currently, a large number of distributed sensing units assembled in aero engines to collect key parameters such as temperature, humidity, vibration, and eccentric speed are connected by cables to build the energy flow links and information flow links required for sensing and data transmission, enabling the prediction of health status and preventive maintenance at the aerospace system level.

[0003] However, cumbersome and bulky cables significantly reduce the safety and fuel efficiency of aviation systems. Battery-powered wireless sensors can reduce weight and improve system reconfigurability and reliability; however, limited battery capacity makes it difficult to meet the long-cycle power consumption requirements of distributed sensors for data acquisition, storage, high-speed data modulation, and transmission. Summary of the Invention

[0004] To meet the power consumption requirements of distributed sensors and improve the flexibility and convenience of sensor deployment, this utility model provides a wireless power supply system for distributed sensors, which features a single transmitter and multiple receivers, enabling wireless power supply for multiple sensors within a certain transmission distance.

[0005] The purpose of this utility model and the technical problem it solves are achieved by the following technical solution. A distributed sensor wireless power supply system according to this utility model includes a transmitter and multiple receivers. The transmitter includes a microwave source, a power amplifier module, and a microstrip patch transmitting antenna 3. The half-power angle α of the microstrip patch transmitting antenna 3 satisfies: tan(α / 2)≥Ф / 2d, where d is the distance between the transmitter and receivers, and Ф is the transmission range of the transmitting antenna at distance d. Sensor units 6 are distributed within the aforementioned transmission range with Ф as the diameter, and each sensor unit 6 is connected to a receiver.

[0006] The purpose of this utility model and the technical problems to be solved can be further achieved by the following technical measures.

[0007] The aforementioned wireless power supply system for distributed sensors includes a receiving antenna 4, a rectifier circuit, and a power control circuit. The rectifier circuit receives the high-frequency AC power transmitted by the receiving antenna 4 and converts it into DC power. The power control circuit receives the DC power transmitted by the rectifier circuit, converts it into the DC power required to power the sensor unit, and then transmits it to the sensor unit 6.

[0008] The aforementioned wireless power supply system for distributed sensors includes a transmitter metal housing and an auxiliary power printed circuit board 7, a signal generator 2, a power amplifier 5, and a microstrip patch transmitting antenna 3 located in the transmitter metal housing. The auxiliary power printed circuit board 7 is connected to a power input connector 8 on the transmitter metal housing 1 and converts the received DC power into the voltage required by the signal generator 2 and the power amplifier 5.

[0009] The aforementioned wireless power supply system for distributed sensors also includes a cooling fan 9 inside the metal housing 1 of the transmitter for dissipating heat from the power amplifier 5.

[0010] The aforementioned wireless power supply system for distributed sensors includes a receiver metal housing, within which the receiving antenna, rectifier circuit, and power management circuit are all located.

[0011] In the aforementioned wireless power supply system for distributed sensors, the metal casing of the receiver is made of aluminum alloy.

[0012] In the aforementioned wireless power supply system for distributed sensors, the metal housing of the receiver is a cuboid structure.

[0013] In the aforementioned wireless power supply system for distributed sensors, the metal casing of the transmitter is made of aluminum alloy.

[0014] In the aforementioned wireless power supply system for distributed sensors, the transmitting end metal housing has a cuboid structure.

[0015] In the aforementioned wireless power supply system for distributed sensors, the receiving antenna is a microstrip patch receiving antenna.

[0016] This utility model has significant advantages and beneficial effects compared with the prior art. Through the above technical solution, this utility model achieves considerable technological advancement and practicality, and has broad industrial application value. It possesses at least the following advantages:

[0017] a. This utility model realizes non-contact power supply for distributed sensors and has a certain degree of offset tolerance. It does not require perfect alignment when wirelessly powering the sensors, thus reducing the operational difficulty of the distributed sensor deployment process.

[0018] b. This utility model realizes non-contact power supply of one transmitter to multiple distributed sensors, that is, within a certain spatial range, multiple sensors can be wirelessly powered.

[0019] c. The microwave source, power amplifier module, and other components at the transmitting end use mature modules, which reduces the complexity of the system;

[0020] d. The receiving antenna, rectifier circuit, and power management circuit of the receiving end are integrated on a single printed circuit board, which features small size and high integration.

[0021] e. The receiver has a cuboid structure and can be directly mounted on the sensor without modifying the sensor structure or appearance. Attached Figure Description

[0022] Figure 1 This is a block diagram illustrating the principle of the wireless power supply system for distributed sensors according to this utility model.

[0023] Figure 2 This is a structural diagram of the wireless power supply system for distributed sensors according to this utility model;

[0024] Figure 3 Schematic diagram of a wireless power supply system transmitter for distributed sensors;

[0025] Figure 4 Schematic diagram of a wireless power supply system receiver for distributed sensors;

[0026] Figure 5 This diagram illustrates the relationship between the half-power angle of the transmitting antenna and the transmission distance and range.

[0027] Figure 6 A schematic diagram of the transmission link for a wireless power supply system for distributed sensors;

[0028] Figure 7 The simulation results are for the transmitting antenna;

[0029] Figure 8 The simulation results are for the receiving antenna.

[0030] [Explanation of Key Component Symbols]

[0031] 1: Metal casing of the transmitter

[0032] 2: Signal Generator

[0033] 3: Microstrip patch transmitting antenna

[0034] 4: Receiving antenna

[0035] 5: Power Amplifier

[0036] 6: Sensor Unit

[0037] 7: Auxiliary power supply printed circuit board

[0038] 8: Power input connector

[0039] 9: Cooling fan

[0040] 10: Receiver metal casing

[0041] 11: Circuit Module Detailed Implementation

[0042] To further illustrate the technical means and effects adopted by this utility model to achieve the intended purpose of the invention, the following detailed description of the specific implementation, structure, features and effects of the wireless power supply system for distributed sensors proposed according to this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0043] Please see Figure 1-8 This diagram illustrates the various components of the wireless power supply system for distributed sensors according to this invention. The system includes a transmitter and multiple receivers, each connected to at least one sensor unit 6 to charge the sensor unit 6. The transmitter includes a microwave source, a power amplifier module, and a transmitting antenna. The microwave source generates a fixed-frequency microwave signal, which is then amplified by the power amplifier module. The power amplifier module amplifies the microwave signal and outputs it to the transmitting antenna to transmit microwave energy into free space. In this embodiment, the transmitting antenna is a microstrip patch.

[0044] The receiving end includes a receiving antenna 4, a rectifier circuit, and a power control circuit. After the receiving antenna 4 captures the microwave energy emitted by the transmitting antenna, it converts it into high-frequency AC power and injects it into the rectifier circuit. The rectifier circuit converts the high-frequency AC power into DC power. After passing through the power management circuit, the DC power is converted into DC power required to power the sensor unit 6.

[0045] The microstrip patch used as the transmitting antenna in this invention is an n×n array microstrip patch antenna. The half-power angle α of this microstrip array antenna satisfies: tan(α / 2)≥Ф / 2d, where d is the distance between the transmitting end and the receiving end, and Ф is the transmission range of the transmitting antenna at a distance d. This transmission range is a circular area with Ф as its diameter. Therefore, when there is a distance d between the transmitting end and the receiving end of this invention, the receiving ends are distributed in a circular area with Ф as its diameter, thereby realizing wireless power transmission from one transmitting end to multiple distributed receiving ends.

[0046] This invention can also determine the output power of the power amplifier module based on the power required by the receiver, the gain of the receiving antenna, space loss, and the gain of the transmitting antenna. With a power amplifier module output power of 250W, a frequency of 2.45GHz, a transmitting antenna size of 12cm×12cm, and a receiving antenna size of 3cm×3cm, it can power approximately 280 sensors with a power consumption of 500mW within a transmission distance of 1m and a transmission area diameter of 0.7m. The transmitting antenna has a radiation gain of approximately 11.5dBi and a half-power angle of approximately 47°. Simulation results are as follows... Figure 7 As shown. The radiation gain of the receiving antenna is approximately 4.7 dBi, and the simulation results are as follows. Figure 8As shown.

[0047] In this embodiment of the invention, the transmitting end includes a transmitting end metal housing 1 and an auxiliary power supply printed circuit board 7, a signal generator 2, a power amplifier 5, and a microstrip patch transmitting antenna 3 located within the transmitting end metal housing 1. The signal generator 2 is a microwave source, and the power amplifier 5 is a power amplifier module. The auxiliary power supply printed circuit board 7 is connected to a power input connector 8 on the transmitting end metal housing 1, receiving external DC power through this connector 8. The auxiliary power supply printed circuit board 7 converts the received DC power into the voltage required by the signal generator 2 and the power amplifier 5. The power amplifier generates a microwave signal of a fixed frequency and injects it into the power amplifier for power amplification. After amplifying the microwave signal, the power amplifier outputs it to the microstrip patch transmitting antenna to transmit microwave energy into free space. The transmitting end metal housing 1 also includes a cooling fan 9 for air cooling of the power amplifier module.

[0048] The receiving end includes a receiving end metal housing 10 and a printed circuit board located inside the receiving end metal housing 10. The printed circuit board integrates a receiving antenna 4 and a circuit module 11. The receiving antenna 4 is a microstrip patch receiving antenna. The circuit module 11 includes a rectifier circuit and a power management circuit. The input terminal of the rectifier circuit is connected to the microstrip patch receiving antenna and converts the high-frequency AC power transmitted to it into DC power. The output terminal of the rectifier circuit is connected to the power management circuit. The power management circuit converts the received DC power into the DC power required by the sensor unit and sends it to the sensor unit 6.

[0049] In this embodiment of the invention, both the transmitting end metal housing 1 and the receiving end metal housing 10 are made of aluminum alloy. Preferably, both the transmitting end metal housing 1 and the receiving end metal housing 10 are cuboid structures.

[0050] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A wireless power supply system for distributed sensors, characterized in that, It includes a transmitter and multiple receivers. The transmitter includes a microwave source, a power amplifier module, and a microstrip patch transmitting antenna. The half-power angle α of the microstrip patch transmitting antenna satisfies: tan(α / 2)≥Ф / 2d, where d is the distance between the transmitter and the receiver, and Ф is the transmission range of the transmitting antenna at a distance d. Sensor units are distributed within the above-mentioned transmission range with Ф as the diameter, and each sensor unit is connected to a receiver.

2. The wireless power supply system for distributed sensors according to claim 1, characterized in that, The receiving end includes a receiving antenna, a rectifier circuit, and a power control circuit. The rectifier circuit receives the high-frequency AC power transmitted by the receiving antenna and converts it into DC power. The power control circuit receives the DC power transmitted by the rectifier circuit, converts it into DC power required to power the sensor unit, and then transmits it to the sensor unit.

3. The wireless power supply system for distributed sensors according to claim 2, characterized in that, The transmitter includes a transmitter metal housing and an auxiliary power printed circuit board, a signal generator, a power amplifier, and a microstrip patch transmitting antenna located in the transmitter metal housing. The auxiliary power printed circuit board is connected to the power input connector on the transmitter metal housing and converts the received DC power into the voltage required by the signal generator and the power amplifier.

4. The wireless power supply system for distributed sensors according to claim 3, characterized in that, The transmitter's metal casing is also equipped with a cooling fan for dissipating heat from the power amplifier.

5. The wireless power supply system for distributed sensors according to claim 2, characterized in that, The receiver includes a receiver metal housing, and the receiving antenna, rectifier circuit and power management circuit are integrated on a printed circuit board located inside the receiver metal housing.

6. The wireless power supply system for distributed sensors according to claim 2, characterized in that, The receiving antenna is a microstrip patch receiving antenna.

7. The wireless power supply system for distributed sensors according to claim 5, characterized in that, The receiver's metal casing is made of aluminum alloy.

8. The wireless power supply system for distributed sensors according to claim 7, characterized in that, The metal casing of the receiver is a cuboid structure.

9. The wireless power supply system for distributed sensors according to claim 4, characterized in that, The transmitter's metal casing is made of aluminum alloy.

10. The wireless power supply system for distributed sensors according to claim 9, characterized in that, The transmitter's metal casing has a cuboid structure.

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