Radar self-checking signal cavity power division equipment with anti-interference structure

Abstract

The invention discloses radar self-checking signal cavity power dividing equipment with an anti-interference structure, and relates to the technical field of wireless radio frequency devices, the radar self-checking signal cavity power dividing equipment comprises a cavity, output ends, input ends and a vibration module, the left side of the outer wall of the cavity is provided with the two input ends, the right side of the outer wall of the cavity is provided with the two output ends, and the vibration module is connected with the output ends. An output end is installed on the right of each of the front side and the rear side of the outer wall of the cavity, a vibration module is installed on the lower side of the outer wall of the cavity, and the vibration module comprises a piezoelectric actuator, a three-axis acceleration sensor, a spectrum analyzer, an elastic base and an energy assembly. By installing the vibration module, the function of automatically eliminating environmental vibration is achieved, the problems that vibration sensing precision is insufficient, passive vibration isolation response lags behind, the energy utilization rate is low and the environmental adaptability is poor are solved, vibration can be actively restrained, dependence on external energy is reduced, and the vibration sensing precision and the environmental adaptability of equipment are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless radio frequency devices, and in particular to a radar self-test signal cavity power splitter device with an anti-interference structure. Background Art

[0002] Modern radar systems have significantly increased their requirements for high-precision, multi-target detection, and anti-interference capabilities, leading to increased hardware design complexity. As a key component of the RF front-end, the cavity power splitter directly affects the radar signal distribution efficiency and anti-interference performance. To accommodate multi-band radars, the power splitter must cover a wider frequency band, reduce hardware redundancy, and integrate a cavity design with filtering and isolation functions to reduce system complexity and improve reliability. Traditional cavity power dividers are prone to mechanical resonance due to their rigid mounting structure, while the use of passive vibration isolators such as air springs has certain limitations in vibration isolation performance. In addition, the vibration during the operation of the cooling system will also interfere with signal transmission.

[0003] Patent CN104882659B discloses a cavity power divider and an antenna. The above patent avoids the problem of difficult control of solder volume and low production efficiency of the cavity power divider.

[0004] The above patent provides at least one welding groove connected to the wiring port on the top of the side wall for enclosing the power splitter cavity. The welding groove is used to place solder, which not only allows the cable braided layer to be welded to the wiring port provided on the side wall by induction welding, avoiding the manual welding method of using an electric soldering iron and improving production efficiency, but also the amount of solder can be controlled even if a hollow power splitter cavity is adopted. Therefore, the cavity power splitter of the present invention effectively solves the inconvenience and defects existing in the existing cavity power splitter both in terms of function and performance, and there is room for optimization in eliminating the influence of environmental vibration on signal transmission.

[0005] To this end, the present application proposes a radar self-test signal cavity power splitter device with an anti-interference structure that automatically eliminates environmental vibrations. Summary of the Invention

[0006] The purpose of the present invention is to provide a radar self-test signal cavity power splitter device with an anti-interference structure to solve the technical problem of interference of environmental vibration on signal transmission raised in the above background technology.

[0007] To achieve the above objectives, the present invention provides the following technical solutions: a radar self-test signal cavity power splitter with an anti-interference structure, comprising a cavity, an output terminal, an input terminal, and a vibration module, wherein two input terminals are installed on the left side of the cavity outer wall, two output terminals are installed on the right side of the cavity outer wall, an output terminal is installed on the right side of the front and rear sides of the cavity outer wall, and a vibration module is installed on the lower side of the cavity outer wall; The vibration module includes: a piezoelectric actuator, a three-axis acceleration sensor and a spectrum analyzer, an elastic base and an energy component; A piezoelectric actuator is installed on the lower side of the outer wall of the cavity, an elastic base is installed on the lower side of the outer wall of the piezoelectric actuator, a three-axis acceleration sensor is installed at the connection between the elastic base and the cavity, spectrum analyzers are installed on the rear side of the outer wall of the input end and the front side of the outer wall of the output end, and an energy component is installed between the upper side of the outer wall of the piezoelectric actuator and the cavity.

[0008] Preferably, the energy component includes: a transducer, a storage unit and a heat sink; A transducer is installed between the upper side of the outer wall of the piezoelectric actuator and the cavity, a storage unit is installed on the lower part of the inner wall of the cavity, the storage unit is connected to the transducer through a copper-plated spring contact, and radiators are installed on the front and back sides of the piezoelectric actuator.

[0009] Preferably, a holder is installed on the upper side of the outer wall of the input end, the slider is fixed to the interface by mechanical locking through the holder, and the holder is connected to the spectrum analyzer through a signal line. The switching module includes: an interface, a slide groove, a slider, a sealing shell and a switching motor; An interface is installed on the left side of the outer wall of the input end, a sealing shell is installed on the left side of the outer wall of the interface, a slider is installed on the upper side of the outer wall of the interface, the slider is connected to the switching motor through a connecting shaft, a slide is installed on the upper side of the outer wall of the cavity, and a switching motor is installed on the rear side of the outer wall of the slide, and the switching motor is connected to the spectrum analyzer and storage unit respectively through signal lines.

[0010] Preferably, the input end is connected to the output end through a signal path installed on the rear side of the outer wall of the input end, and a path component is installed on the rear side of the outer wall of the switching motor, and the path component includes: a baffle, a push rod, a rotating shaft and a lock; A baffle is installed on the upper side of the outer wall of the signal path, a rotating shaft is installed on the upper side of the outer wall of the baffle, and a push rod is installed on the upper side of the outer wall of the rotating shaft. The rotating shaft, the push rod and the lock are connected to the switch installed on the output side of the switching motor through a connecting shaft.

[0011] Preferably, the transducer is connected to the heat pipe through a connecting pipe, and the heat module includes: a heat pipe, a heat exchange plate, a temperature sensor and a circulation pump; A heat pipe is installed on the lower side of the outer wall of the signal path, a heat exchange plate is installed on the inner side wall of the cavity, a temperature sensor is installed on the upper side of the outer wall of the signal path, and a circulation pump is installed on the right side of the outer wall of the vibration module. The circulation pump is connected to the heat pipe and the heat exchange plate through a connecting pipe, and the circulation pump is connected to the temperature sensor and storage unit respectively through signal lines.

[0012] Preferably, the piezoelectric actuator comprises: a first piezoelectric element, a pre-compression spring, an inertial mass block and a transmission unit; A first piezoelectric element is installed between the transducer and the piezoelectric actuator. A preload spring is installed on the edge of the first piezoelectric element. The preload spring is fixed in the groove of the elastic base through a thread. An inertial mass block is installed on the top of the output side of the first piezoelectric element. A transmission unit is installed through the middle of the inner wall of the cavity. The inertial mass block is connected to the transmission unit through a connecting shaft.

[0013] Preferably, the transducer comprises: a heat exchanger, a second piezoelectric element, a connecting tube and an extraction circuit; A second piezoelectric element is installed between the piezoelectric actuator and the cavity. A heat exchanger is installed in the middle of the outer wall of the second piezoelectric element. The heat exchanger is connected to the cooling tube through a connecting tube. The second piezoelectric element and the heat exchanger are connected to the storage unit through an extraction circuit.

[0014] Preferably, the radiator comprises: a fan and a cooling pipe; Fans are installed on the front and back sides of the outer wall of the piezoelectric actuator, and a cooling pipe is installed between the fan and the piezoelectric actuator. The fan is connected to the switch installed at the output side of the switching motor through a connecting shaft, and the cooling pipe is connected to the circulation pump through a connecting pipe.

[0015] Preferably, the signal path includes: an attenuator, a low noise amplifier and a power splitter network; An attenuator is installed on the rear side of the outer wall of the input end, and a low-noise amplifier is installed on the rear side of the outer wall of the attenuator. The output side of the low-noise amplifier is connected to a power splitter network. After the signal is input from the input end, it passes through the attenuator and the attenuation is dynamically adjusted by the MCU. The low-noise amplifier amplifies the signal with a gain of 20dB to 40dB, thereby improving the signal-to-noise ratio. The signal is then branched and output from the output end through the power splitter network.

[0016] Preferably, the circulating pump comprises: a pump body, an impeller, a sealing ring and a circulating motor; A pump body is installed on the right side of the outer wall of the vibration module, and an impeller is installed in the middle of the inner wall of the pump body. The impeller is connected to the circulation motor through a connecting shaft. A sealing ring is installed at the connection between the pump body and the heat conduction pipe, heat exchange plate and cooling pipe through a connecting pipe. A circulation motor is installed on the lower side of the outer wall of the pump body, and the circulation motor is connected to the storage unit through a signal line.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention, by installing a vibration module, realizes the function of automatically eliminating environmental vibrations, solving the problems of insufficient vibration perception accuracy, delayed passive vibration isolation response, low energy utilization, and poor environmental adaptability. It can actively suppress vibrations, reduce dependence on external energy, and improve the vibration perception accuracy and environmental adaptability of the equipment. 2. The present invention, by installing an energy component and a switching module, realizes the function of dynamically switching the input terminal, solving the problems of being unable to adapt to different signal sources, prone to signal crosstalk and high signal loss. It can perform high-precision signal comparison tests, reduce crosstalk between different signals, suppress intermodulation interference caused by high-frequency signal leakage, and extend the service life of the equipment. 3. The present invention, by installing energy components and path modules, realizes the function of automatically switching path modes, solving the problems of fixed paths that cannot be adjusted in real time, easy loosening in vibrating environments, and poor environmental adaptability. It can flexibly adjust the number of signal paths, reduce the energy consumption of the device, and improve the device's anti-interference ability and environmental adaptability. 4. The present invention realizes energy self-sufficiency by installing energy components and heat modules, solves the problems of dependence on external power supply, insufficient utilization of waste heat and poor environmental adaptability, can utilize the waste heat of the equipment to generate electricity, extends the service life of the equipment, and improves the environmental adaptability and energy saving of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view structural schematic diagram of the present invention; Figure 2 It is a side structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the energy components and signal pathway structure of the present invention; Figure 4 This is a schematic diagram of the switching module structure of the present invention; Figure 5 Schematic diagram of the pathway module structure of the present invention; Figure 6 This is a schematic diagram of the heat module structure of the present invention; Figure 7 Schematic diagram of the heat exchanger and radiator structure of the present invention; Figure 8 It is a schematic structural diagram of the circulation pump of the present invention.

[0019] In the figure: 1. Cavity; 2. Output terminal; 3. Input terminal; 4. Piezoelectric actuator; 5. Triaxial acceleration sensor; 6. Spectrum analyzer; 7. Elastic base; 8. Transducer; 9. Storage unit; 10. Radiator; 11. Fixer; 12. Slider; 13. Interface; 14. Slide; 15. Sealed shell; 16. Switching motor; 17. Signal path; 18. Baffle; 19. Push rod; 20. Rotating shaft; 21. Lock; 22. Switch; 23. Heat pipe; 24. Heat exchange plate; 25. Temperature sensor; 26. Circulation pump; 27. First piezoelectric element; 28. Preload spring; 29. ​​Inertial mass block; 30. Transmission unit; 31. Heat exchanger; 32. Second piezoelectric element; 33. Connecting pipe; 34. Extraction circuit; 35. Attenuator; 36. Low-noise amplifier; 37. Power splitter network; 38. Fan; 39. Cooling pipe; 40. Pump body; 41. Impeller; 42. Sealing ring; 43. Circulation motor. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc., should be understood in a broad sense. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a mechanical connection or an electrical connection; it may refer to a direct connection or an indirect connection through an intermediate medium; it may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0023] Example 1: Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 7 A radar self-test signal cavity power splitter with an anti-interference structure includes a cavity 1, an output terminal 2, an input terminal 3, and a vibration module. Two input terminals 3 are installed on the left side of the outer wall of the cavity 1, two output terminals 2 are installed on the right side of the outer wall of the cavity 1, and an output terminal 2 is installed on the right side of the front and rear sides of the outer wall of the cavity 1. A vibration module is installed on the lower side of the outer wall of the cavity 1; The vibration module includes: a piezoelectric actuator 4, a triaxial acceleration sensor 5 and a spectrum analyzer 6, an elastic base 7 and an energy component; A piezoelectric actuator 4 is installed on the lower side of the outer wall of the cavity 1, an elastic base 7 is installed on the lower side of the outer wall of the piezoelectric actuator 4, a three-axis acceleration sensor 5 is installed at the connection between the elastic base 7 and the cavity 1, a spectrum analyzer 6 is installed on the rear side of the outer wall of the input end 3 and the front side of the outer wall of the output end 2, and an energy component is installed between the upper side of the outer wall of the piezoelectric actuator 4 and the cavity 1; The energy component includes: a transducer 8, a storage unit 9 and a heat sink 10; A transducer 8 is installed between the upper side of the outer wall of the piezoelectric actuator 4 and the cavity 1. A storage unit 9 is installed on the lower part of the inner wall of the cavity 1. The storage unit 9 is connected to the transducer 8 through a copper-plated spring contact. Heat sinks 10 are installed on the front and back sides of the piezoelectric actuator 4. The piezoelectric actuator 4 includes: a first piezoelectric element 27, a pre-compression spring 28, an inertial mass block 29 and a transmission unit 30; A first piezoelectric element 27 is installed between the transducer 8 and the piezoelectric actuator 4. A preload spring 28 is installed on the edge of the first piezoelectric element 27. The preload spring 28 is fixed to the groove of the elastic base 7 by a thread. An inertial mass block 29 is installed on the top of the output side of the first piezoelectric element 27. A transmission unit 30 is installed through the middle of the inner wall of the cavity 1. The inertial mass block 29 is connected to the transmission unit 30 via a connecting shaft. The transducer 8 includes a heat exchanger 31, a second piezoelectric element 32, a connecting tube 33 and an extraction circuit 34. A second piezoelectric element 32 is installed between the piezoelectric actuator 4 and the cavity 1. A heat exchanger 31 is installed in the middle of the outer wall of the second piezoelectric element 32. The heat exchanger 31 is connected to the heat pipe 23 via a connecting pipe 33. The second piezoelectric element 32 and the heat exchanger 31 are connected to the storage unit 9 via an extraction circuit 34. The radiator 10 includes a fan 38 and a cooling pipe 39; Fans 38 are installed on the front and rear sides of the outer wall of the piezoelectric actuator 4. A cooling pipe 39 is installed between the fan 38 and the piezoelectric actuator 4. The fan 38 is connected to the switch 22 installed on the output side of the switching motor 16 through a connecting shaft. The cooling pipe 39 is connected to the circulation pump 26 through a connecting pipe. Furthermore, during the operation of the device, the vibration frequency of the environment in which the cavity 1 is located is detected by the three-axis acceleration sensor 5, and the spectrum characteristics of the transmission signal are detected by the spectrum analyzer 6 located at the output end 2 and the input end 3, and analyzed in combination with the spectrum characteristics of the signal before entering the input end 3. When the environmental vibration frequency is the same as or similar to the signal spectrum, the control storage unit 9 outputs a voltage signal to the first piezoelectric element 27 to form an electric field, and axial deformation is generated through the inverse piezoelectric effect. The preload spring 28 simultaneously applies a constant mechanical preload force to the first piezoelectric element 27. The inertial mass block 29 rigidly connected to the first piezoelectric element 27 converts high-frequency rotation into low-frequency mechanical displacement through the inertial effect, so that the vibration frequency of the piezoelectric actuator 4 can match the vibration environment requirements of 5Hz to 50Hz. The piezoelectric deformation generated by the first piezoelectric element 27 is transmitted to the transmission unit 30 through the connecting shaft. The transmission unit 30 starts to act on the cavity 1 to actively eliminate the interference of external vibration. At the same time, the elastic base 7 at the bottom assists in eliminating In addition to environmental vibration, when the environmental vibration frequency is greater than 200Hz, the second piezoelectric element 32 located between the piezoelectric actuator 4 and the cavity 1 uses the positive piezoelectric effect to convert energy under the action of environmental vibration, and transmits the converted electrical energy through the extraction circuit 34 to the storage unit 9 for storage. In this process, in order to reduce or eliminate the impact of environmental vibration on the cavity 1, the piezoelectric actuator 4 and the elastic base 7 assist in weakening the impact of environmental vibration. The heat sink 10 located on the front and rear sides of the piezoelectric actuator 4 is started, and the switching motor 16 and the fan 38 are connected through the switch 22. The fan 38 is driven to rotate by the switching motor 16 to accelerate the cooling effect of the cooling pipe 39, and the two are assisted in heat dissipation to avoid the temperature increase causing the signal to be offset due to temperature changes, thereby realizing the function of automatically eliminating environmental vibration, solving the problems of insufficient vibration perception accuracy, delayed passive vibration isolation response, low energy utilization and poor environmental adaptability, and can actively suppress vibration, reduce dependence on external energy, and improve the vibration perception accuracy and environmental adaptability of the equipment.

[0024] Example 2: Please refer to Figure 1 、 Figure 3 and Figure 4 , a radar self-test signal cavity power splitter device with an anti-interference structure, the energy component includes: a transducer 8, a storage unit 9 and a radiator 10; A transducer 8 is installed between the upper side of the outer wall of the piezoelectric actuator 4 and the cavity 1. A storage unit 9 is installed on the lower part of the inner wall of the cavity 1. The storage unit 9 is connected to the transducer 8 through a copper-plated spring contact. Heat sinks 10 are installed on the front and back sides of the piezoelectric actuator 4. A holder 11 is installed on the upper side of the outer wall of the input end 3, and the slider 12 is fixed to the interface 13 by mechanical locking through the holder 11. The holder 11 is connected to the spectrum analyzer 6 through a signal line. The switching module includes: an interface 13, a slide 14, a slider 12, a sealed shell 15 and a switching motor 16; An interface 13 is installed on the left side of the outer wall of the input end 3, a sealing shell 15 is installed on the left side of the outer wall of the interface 13, a slider 12 is installed on the upper side of the outer wall of the interface 13, and the slider 12 is connected to the switching motor 16 via a connecting shaft. A chute 14 is installed on the upper side of the outer wall of the cavity 1, and a switching motor 16 is installed on the rear side of the outer wall of the chute 14. The switching motor 16 is connected to the spectrum analyzer 6 and the storage unit 9 respectively through signal lines; Furthermore, when the signal input to the cavity 1 is a signal of a different frequency band or the device needs to be tested in a diversified manner, the connection between the interface 13 and the two input terminals 3 located on the left side of the outer wall of the cavity 1 is switched, so that the input terminals 3 can adapt to the access requirements of different signal sources. At the same time, when the performance difference between different input signals needs to be compared during self-test or calibration, the response characteristics of different signal sources can be quickly tested by switching the input terminals 3. When the input terminal 3 needs to be switched, the switching motor 16 receives the switching signal, and the switch 22 located on the output side of the switching motor 16 connects the switching motor 16 with the holder 11, releasing the mechanical lock between the holder 11 and the slider 12. Then, the switch 22 is controlled to connect the switching motor 16 with the slider 12. Driven by the switching motor 16, the slider 12 slides in the slide groove 14. Move the slider 12 and the interface 13 connected to the slider 12. When moving to another input end 3, the switching motor 16 stops operating, and the switch 22 connects the switching motor 16 to the holder 11, restoring the mechanical locking state between the slider 12 and the holder 11, completing the switching of the input end 3, and allowing the signal to be input into the cavity 1 from the other input end 3. During the switching process, the sealing shell 15 located on the front side of the outer wall of the interface 13 ensures that no debris will appear in the input end 3 before and after switching, avoiding the impact of debris on signal transmission, realizing the function of dynamically switching the input end 3, solving the problems of being unable to adapt to different signal sources, prone to signal crosstalk and high signal loss, enabling high-precision signal comparison testing, reducing crosstalk between different signals, suppressing intermodulation interference caused by high-frequency signal leakage, and extending the service life of the equipment.

[0025] Example 3: Please refer to Figure 1 、 Figure 3 and Figure 5 , a radar self-test signal cavity power splitter device with an anti-interference structure, the energy component includes: a transducer 8, a storage unit 9 and a radiator 10; A transducer 8 is installed between the upper side of the outer wall of the piezoelectric actuator 4 and the cavity 1. A storage unit 9 is installed on the lower part of the inner wall of the cavity 1. The storage unit 9 is connected to the transducer 8 through a copper-plated spring contact. Heat sinks 10 are installed on the front and back sides of the piezoelectric actuator 4. The input end 3 is connected to the output end 2 via a signal path 17 installed on the rear side of the outer wall of the input end 3. A path component is installed on the rear side of the outer wall of the switching motor 16. The path component includes: a baffle 18, a push rod 19, a rotating shaft 20 and a lock 21; A baffle 18 is mounted on the upper side of the outer wall of the signal path 17, a rotating shaft 20 is mounted on the upper side of the outer wall of the baffle 18, a push rod 19 is mounted on the upper side of the outer wall of the rotating shaft 20, and the rotating shaft 20, the push rod 19 and the lock 21 are connected to a switch 22 mounted on the output side of the switching motor 16 via a connecting shaft; The signal path 17 includes: an attenuator 35, a low noise amplifier 36 and a power splitter network 37; An attenuator 35 is installed on the rear side of the outer wall of the input terminal 3. A low-noise amplifier 36 is installed on the rear side of the outer wall of the attenuator 35. The output side of the low-noise amplifier 36 is connected to a power splitter network 37. After the signal is input from the input terminal 3 and passes through the attenuator 35, the attenuation is dynamically adjusted by the MCU. The low-noise amplifier 36 amplifies the signal with a gain of 20dB to 40dB, thereby improving the signal-to-noise ratio. The signal is then branched and output from the output terminal 2 through the power splitter network 37. Furthermore, after the signal is input from the input terminal 3 through the interface 13, it enters the attenuator 35. The attenuator 35 dynamically adjusts the signal attenuation through the MCU, so that the device can adapt to different input power scenarios. After attenuation, the signal enters the low noise amplifier 36, which amplifies the signal with a gain of 20dB to 30dB and a noise factor of less than or equal to 2dB, which can improve the signal-to-noise ratio of weak signals. It then enters the power division network 37 to complete the signal branching. When it is necessary to monitor multiple targets or directions at the same time, it is necessary to increase the number of signal paths 17 to expand the coverage range, and in low load conditions, the signal is amplified by 20dB to 30dB and the noise factor is less than or equal to 2dB. In this state, it is necessary to close non-essential paths to reduce power consumption and thermal noise. In addition, in a high-interference environment, the redundant signal path 17 can be closed to reduce the signal even if multipath reflection is caused. When it is necessary to reduce the signal path 17, the switch 22 located in front of the output side of the switching motor 16 is used to connect the switching motor 16 to the push rod 19. Driven by the switching motor 16, the push rod 19 pushes the rotating shaft 20 and the baffle 18 downward to close the originally open signal path 17, so that the two output terminals 2 on the right side of the outer wall of the cavity 1 are closed, and the signal is output from the input terminals 2 on the right side of the front and rear sides of the cavity 1. The output of the output terminal 2 is output. When the two adjacent output terminals 2 need to output signals, the switching motor 16 is connected to the rotating shaft 20 through the switch 22. The switching motor 16 drives the rotating shaft 20 to rotate the baffle 18 at a specific angle, so that the signal is output from the adjacent output terminal 2. During the path switching process, after the baffle 18 completes the switching, the locker 21 located on the right side of the outer wall of the baffle 18 locks the rotating shaft 20, the push rod 19 and the baffle 18. At the same time, the switch 22 disconnects the switching motor 16 from the push rod 19 and the rotating shaft 20, so that the position of the baffle 18 is fixed to avoid the signal transmission. During the transmission process, the signal path 17 is switched incorrectly due to vibration. When it is necessary to increase the signal path 17, the lock 21 on the push rod 19 and the rotating shaft 20 is canceled, and the position of the baffle 18 is adjusted under the action of the switch 22 and the switching motor 16, so as to increase the number of signal paths 17, realize the function of automatic switching path mode, solve the problems of fixed paths that cannot be adjusted in real time, easy loosening in a vibrating environment, and poor environmental adaptability, can flexibly adjust the number of signal paths 17, reduce the energy consumption of the equipment, and increase the anti-interference ability and environmental adaptability of the equipment.

[0026] Example 4: Please refer to Figure 1 、 Figure 3 、 Figure 6 、 Figure 7 and Figure 8 , a radar self-test signal cavity power splitter device with an anti-interference structure, the energy component includes: a transducer 8, a storage unit 9 and a radiator 10; A transducer 8 is installed between the upper side of the outer wall of the piezoelectric actuator 4 and the cavity 1. A storage unit 9 is installed on the lower part of the inner wall of the cavity 1. The storage unit 9 is connected to the transducer 8 through a copper-plated spring contact. Heat sinks 10 are installed on the front and back sides of the piezoelectric actuator 4. The transducer 8 is connected to the heat pipe 23 through a connecting pipe. The heat module includes: a heat pipe 23, a heat exchange plate 24, a temperature sensor 25 and a circulation pump 26; A heat pipe 23 is installed on the lower side of the outer wall of the signal path 17, a heat exchange plate 24 is installed on the inner side wall of the cavity 1, a temperature sensor 25 is installed on the upper side of the outer wall of the signal path 17, and a circulation pump 26 is installed on the right side of the outer wall of the vibration module. The circulation pump 26 is connected to the heat pipe 23 and the heat exchange plate 24 through a connecting pipe. The circulation pump 26 is connected to the temperature sensor 25 and the storage unit 9 through signal lines. The transducer 8 includes: a heat exchanger 31, a second piezoelectric element 32, a connecting tube 33 and an extraction circuit 34; A second piezoelectric element 32 is installed between the piezoelectric actuator 4 and the cavity 1. A heat exchanger 31 is installed in the middle of the outer wall of the second piezoelectric element 32. The heat exchanger 31 is connected to the cooling tube 39 via a connecting tube 33. The second piezoelectric element 32 and the heat exchanger 31 are connected to the storage unit 9 via an extraction circuit 34. The circulation pump 26 includes: a pump body 40, an impeller 41, a sealing ring 42 and a circulation motor 43; A pump body 40 is installed on the right side of the outer wall of the vibration module, and an impeller 41 is installed in the middle of the inner wall of the pump body 40. The impeller 41 is connected to the circulation motor 43 through a connecting shaft. A sealing ring 42 is installed at the connection between the pump body 40 and the heat conduction pipe 23, the heat exchange plate 24 and the cooling pipe 39 through a connecting pipe. A circulation motor 43 is installed on the lower side of the outer wall of the pump body 40. The circulation motor 43 is connected to the storage unit 9 through a signal line. Furthermore, during the operation of the device, the temperature sensor 25 located on the upper side of the outer wall of the signal path 17 detects the temperature inside the cavity 1. The heat generated during the operation of the device passes through the heat pipe 23 located on the lower side of the outer wall of the signal path 17 and the heat exchange plate 24 located on the inner side wall of the cavity 1, and is connected to the storage unit 9 through the circulation motor 43, driving the impeller 41 to rotate at 800rpm / min~3000rpm / min. The low-temperature liquid in the cooling pipe 39 is sucked into the pump body 40. The pressure of the low-temperature liquid increases under the action of the centrifugal force of the impeller 41. The pressurized low-temperature liquid enters the heat pipe 23 and the heat exchange plate 24 through the connecting pipe. The low-temperature liquid entering the heat pipe 23 and the heat exchange plate 24 reduces the temperature inside the cavity 1 through radiation heat dissipation and convection heat dissipation. After the heat dissipation is completed The high-temperature liquid flows back into the cooling pipe 39 through the connecting pipe by gravity to complete the heat exchange. After the liquid that absorbs heat flows back into the cooling pipe 39, the temperature sensor 25 detects that the temperature inside the cavity 1 has dropped, and the switch 22 at the output side of the switching motor 16 connects the fan 38 to the switching motor 16 to cool the high-temperature liquid in the cooling pipe 39 to dissipate the heat. The heat exchanger 31 located in the middle of the outer wall of the cooling pipe 39 senses the temperature difference and uses the temperature difference to generate electricity. The generated electricity is transmitted to the storage unit 9 through the extraction circuit 34, realizing the function of energy self-sufficiency, solving the problems of dependence on external power supply, insufficient utilization of waste heat and poor environmental adaptability, and being able to use the waste heat of the equipment to generate electricity, thereby extending the service life of the equipment and improving the environmental adaptability and energy saving of the equipment.

[0027] Example 5: Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 6 and Figure 7 A radar self-test signal cavity power splitter with an anti-interference structure includes a cavity 1, an output terminal 2, an input terminal 3, and a vibration module. Two input terminals 3 are installed on the left side of the outer wall of the cavity 1, two output terminals 2 are installed on the right side of the outer wall of the cavity 1, and an output terminal 2 is installed on the right side of the front and rear sides of the outer wall of the cavity 1. A vibration module is installed on the lower side of the outer wall of the cavity 1; The vibration module includes: a piezoelectric actuator 4, a triaxial acceleration sensor 5 and a spectrum analyzer 6, an elastic base 7 and an energy component; A piezoelectric actuator 4 is installed on the lower side of the outer wall of the cavity 1, an elastic base 7 is installed on the lower side of the outer wall of the piezoelectric actuator 4, a three-axis acceleration sensor 5 is installed at the connection between the elastic base 7 and the cavity 1, a spectrum analyzer 6 is installed on the rear side of the outer wall of the input end 3 and the front side of the outer wall of the output end 2, and an energy component is installed between the upper side of the outer wall of the piezoelectric actuator 4 and the cavity 1; The energy component includes: a transducer 8, a storage unit 9 and a heat sink 10; A transducer 8 is installed between the upper side of the outer wall of the piezoelectric actuator 4 and the cavity 1. A storage unit 9 is installed on the lower part of the inner wall of the cavity 1. The storage unit 9 is connected to the transducer 8 through a copper-plated spring contact. Heat sinks 10 are installed on the front and back sides of the piezoelectric actuator 4. The transducer 8 is connected to the heat pipe 23 through a connecting pipe. The heat module includes: a heat pipe 23, a heat exchange plate 24, a temperature sensor 25 and a circulation pump 26; A heat pipe 23 is installed on the lower side of the outer wall of the signal path 17, a heat exchange plate 24 is installed on the inner side wall of the cavity 1, a temperature sensor 25 is installed on the upper side of the outer wall of the signal path 17, and a circulation pump 26 is installed on the right side of the outer wall of the vibration module. The circulation pump 26 is connected to the heat pipe 23 and the heat exchange plate 24 through a connecting pipe. The circulation pump 26 is connected to the temperature sensor 25 and the storage unit 9 through signal lines. The transducer 8 includes: a heat exchanger 31, a second piezoelectric element 32, a connecting tube 33 and an extraction circuit 34; A second piezoelectric element 32 is installed between the piezoelectric actuator 4 and the cavity 1. A heat exchanger 31 is installed in the middle of the outer wall of the second piezoelectric element 32. The heat exchanger 31 is connected to the cooling tube 39 via a connecting tube 33. The second piezoelectric element 32 and the heat exchanger 31 are connected to the storage unit 9 via an extraction circuit 34. Furthermore, during the operation of the device, the heat inside the cavity 1 is concentrated and transferred to the cooling pipe 39 through the heat pipe 23 and the heat exchange plate 24, and then the high-temperature liquid in the cooling pipe 39 is cooled by the fan 38. When the heat inside the cavity 1 is eliminated, the liquid flow, the rotation of the fan 38, and the operation of the circulation pump 26 will all generate vibrations. The generated vibrations will be transmitted to the cavity 1, thereby affecting the transmission of the signal in the signal path 17. When the vibration amplitude exceeds 50μm, the imbalance of the power division ratio may cause insertion loss fluctuations of more than 0.5dB, affecting the synchronization accuracy of multi-channel signals. Vibration will also be generated when the heat exchanger 31 uses temperature difference to generate electricity. Therefore, during the operation of the device, the vibration condition of the cavity 1 is collected by the three-axis acceleration sensor 5, and the vibration condition is compared with the signal information input by the input terminal 3. When the vibration affects the stability of signal transmission, the piezoelectric actuator 4 is used to vibrate the device itself. The spring base 7 assists in the vibration elimination process, offsetting the vibration generated by the device operation, thereby improving the stability of the device operation.

[0028] Working principle: When the signal input to the cavity 1 is a signal of a different frequency band or the device needs to be tested in a diversified manner, the connection between the interface 13 and the two input terminals 3 located on the left side of the outer wall of the cavity 1 is switched so that the input terminals 3 can adapt to the access requirements of different signal sources. At the same time, when self-test or calibration is performed, it is necessary to compare the performance differences between different input signals. By switching the input terminals 3, the response characteristics of different signal sources can be quickly tested. When the input terminal 3 needs to be switched, the switching motor 16 receives the switching signal, and the switch 22 located on the output side of the switching motor 16 connects the switching motor 16 to the holder 11, releasing the mechanical lock between the holder 11 and the slider 12. Tighten, then control the switch 22 to connect the switching motor 16 with the slider 12. Driven by the switching motor 16, the slider 12 slides in the slide groove 14, moving the slider 12 and the interface 13 connected to the slider 12. When moving to the other input end 3, the switching motor 16 stops operating, and the switch 22 connects the switching motor 16 with the holder 11, restoring the mechanical locking state between the slider 12 and the holder 11, completing the switching of the input end 3, so that the signal is input into the cavity 1 from the other input end 3. During the switching process, the sealing shell 15 located on the front side of the outer wall of the interface 13 ensures that no debris will appear in the input end 3 before and after the switching, thereby preventing the debris from affecting the signal transmission; After the signal is input from the input end 3 through the interface 13, it enters the attenuator 35. The attenuator 35 dynamically adjusts the signal attenuation through the MCU, so that the device can adapt to different input power scenarios. After attenuation, the signal enters the low-noise amplifier 36 to amplify the signal with a gain of 20dB to 30dB and a noise figure less than or equal to 2dB, which can improve the signal-to-noise ratio of weak signals. It then enters the power division network 37 to complete the signal branching. When it is necessary to monitor multiple targets or directions at the same time, it is necessary to increase the number of signal paths 17 to expand the coverage range. In a low-load state, it is necessary to close unnecessary paths to reduce power consumption and thermal noise. In addition, in a high-interference environment, the redundant signal path 17 can be closed to reduce the signal caused by multipath reflection. When it is necessary to reduce the signal path 17, the switching motor 16 is connected to the push rod 19 through the switch 22 located on the front side of the output side of the switching motor 16. Driven by the switching motor 16, the push rod 19 pushes the rotating shaft 20 and the baffle 18 downward to open the originally open signal. The signal path 17 is closed, so that the two output terminals 2 located on the right side of the outer wall of the cavity 1 are closed, and the signal is output from the output terminals 2 located on the right side of the front and rear sides of the cavity 1. When the two adjacent output terminals 2 need to output signals, the switching motor 16 is connected to the rotating shaft 20 through the switch 22. The switching motor 16 drives the rotating shaft 20 to rotate the baffle 18 at a specific angle, so that the signal is output from the adjacent output terminals 2. During the path switching process, after the baffle 18 completes the switching, the locker 21 located on the right side of the outer wall of the baffle 18 locks the rotating shaft 20, the push rod 19 and the baffle 18. At the same time, the switcher 22 disconnects the switching motor 16 from the push rod 19 and the rotating shaft 20, so that the position of the baffle 18 is fixed to avoid erroneous switching of the signal path 17 due to vibration during signal transmission. When it is necessary to increase the signal path 17, the lock on the push rod 19 and the rotating shaft 20 by the locker 21 is released, and the position of the baffle 18 is adjusted under the action of the switcher 22 and the switching motor 16, thereby increasing the number of signal paths 17. During the operation of the device, the vibration frequency of the environment in which the cavity 1 is located is detected by the three-axis acceleration sensor 5, and the spectrum characteristics of the transmission signal are detected by the spectrum analyzer 6 located at the output end 2 and the input end 3. The spectrum characteristics of the signal before entering the input end 3 are analyzed. When the environmental vibration frequency is the same or similar to the signal spectrum, the control storage unit 9 outputs a voltage signal to the first piezoelectric element 27 to form an electric field, and an axial deformation is generated through the inverse piezoelectric effect. The preload spring 28 applies a constant mechanical preload force to the first piezoelectric element 27 at the same time. The inertial mass block 29 rigidly connected to the first piezoelectric element 27 converts the high-frequency rotation into a low-frequency mechanical displacement through the inertial effect, so that the vibration frequency of the piezoelectric actuator 4 can match 5H In order to meet the vibration environment requirements of z~50Hz, the piezoelectric deformation generated by the first piezoelectric element 27 is transmitted to the transmission unit 30 through the connecting shaft. The transmission unit 30 starts to act on the cavity 1 to actively eliminate the interference of external vibration. At the same time, the elastic base 7 at the bottom assists in eliminating environmental vibration. The transducer 8 generates electricity through the positive piezoelectric effect to eliminate part of the environmental vibration. The piezoelectric actuator 4 and the elastic base 7 assist in weakening the influence of environmental vibration. The radiator 10 located on the front and rear sides of the piezoelectric actuator 4 is started, and the switching motor 16 and the fan 38 are connected through the switch 22. The fan 38 is driven to rotate by the switching motor 16, which accelerates the cooling effect of the cooling pipe 39 and assists in heat dissipation of the two to avoid the temperature increase causing the signal to be offset due to temperature change. During the operation of the equipment, the temperature sensor 25 located on the upper side of the outer wall of the signal path 17 detects the temperature inside the cavity 1. The heat generated during the operation of the equipment passes through the heat pipe 23 located on the lower side of the outer wall of the signal path 17 and the heat exchange plate 24 located on the inner side wall of the cavity 1, and is connected to the storage unit 9 through the circulation motor 43, driving the impeller 41 to rotate at 800rpm / min~3000rpm / min. The low-temperature liquid in the cooling pipe 39 is sucked into the pump body 40. The pressure of the low-temperature liquid increases under the action of the centrifugal force of the impeller 41. The pressurized low-temperature liquid enters the heat pipe 23 and the heat exchange plate 24 through the connecting pipe. The low-temperature liquid entering the heat pipe 23 and the heat exchange plate 24 reduces the temperature inside the cavity 1 through radiation heat dissipation and convection heat dissipation. After the heat dissipation is completed, the high-temperature liquid is circulated. The liquid is returned into the cooling pipe 39 through the connecting pipe due to gravity to complete the heat exchange. After the liquid that absorbs heat is returned into the cooling pipe 39, the temperature sensor 25 detects that the temperature inside the cavity 1 has dropped. The switch 22 at the output side of the switching motor 16 connects the fan 38 to the switching motor 16 to cool the high-temperature liquid in the cooling pipe 39 to dissipate the heat. The heat exchanger 31 located in the middle of the outer wall of the cooling pipe 39 senses the temperature difference and uses the temperature difference to generate electricity. The generated electric energy is transmitted to the storage unit 9 through the extraction circuit 34. When the ambient vibration frequency is greater than 200Hz, the second piezoelectric element 32 located between the piezoelectric actuator 4 and the cavity 1 uses the positive piezoelectric effect to convert energy under the action of the ambient vibration, and transmits the converted electric energy to the storage unit 9 through the extraction circuit 34 for storage.

[0029] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A radar self-test signal cavity power splitter with an anti-interference structure, characterized by: The device comprises a cavity (1), an output terminal (2), an input terminal (3) and a vibration module, wherein two input terminals (3) are installed on the left side of the outer wall of the cavity (1), two output terminals (2) are installed on the right side of the outer wall of the cavity (1), one output terminal (2) is installed on the right side of the front and rear sides of the outer wall of the cavity (1), and the vibration module is installed on the lower side of the outer wall of the cavity (1); The vibration module comprises: a piezoelectric actuator (4), a three-axis acceleration sensor (5), a spectrum analyzer (6), an elastic base (7), and an energy component; A piezoelectric actuator (4) is installed on the lower side of the outer wall of the cavity (1), an elastic base (7) is installed on the lower side of the outer wall of the piezoelectric actuator (4), a three-axis acceleration sensor (5) is installed at the connection between the elastic base (7) and the cavity (1), a spectrum analyzer (6) is installed on the rear side of the outer wall of the input end (3) and the front side of the outer wall of the output end (2), and an energy component is installed between the upper side of the outer wall of the piezoelectric actuator (4) and the cavity (1).

2. The radar self-test signal cavity power splitter device with an anti-interference structure according to claim 1, characterized in that: The energy component comprises: a transducer (8), a storage unit (9) and a heat sink (10); A transducer (8) is installed between the upper side of the outer wall of the piezoelectric actuator (4) and the cavity (1), a storage unit (9) is installed at the lower part of the inner wall of the cavity (1), and the storage unit (9) is connected to the transducer (8) through a copper-plated spring contact. Heat sinks (10) are installed on the front and rear sides of the piezoelectric actuator (4).

3. The radar self-test signal cavity power splitter device with an anti-interference structure according to claim 1, characterized in that: A holder (11) is installed on the upper side of the outer wall of the input end (3), and the slider (12) is fixed to the interface (13) by mechanical locking through the holder (11). The holder (11) is connected to the spectrum analyzer (6) through a signal line. The switching module includes: an interface (13), a slide groove (14), a slider (12), a sealing shell (15) and a switching motor (16); An interface (13) is installed on the left side of the outer wall of the input end (3), a sealing shell (15) is installed on the left side of the outer wall of the interface (13), a slider (12) is installed on the upper side of the outer wall of the interface (13), the slider (12) is connected to the switching motor (16) through a connecting shaft, a slide groove (14) is installed on the upper side of the outer wall of the cavity (1), and a switching motor (16) is installed on the rear side of the outer wall of the slide groove (14), and the switching motor (16) is connected to the spectrum analyzer (6) and the storage unit (9) respectively through signal lines.

4. The radar self-test signal cavity power splitter device with an anti-interference structure according to claim 1, characterized in that: The input end (3) is connected to the output end (2) via a signal path (17) installed on the rear side of the outer wall of the input end (3); a path component is installed on the rear side of the outer wall of the switching motor (16), and the path component includes: a baffle (18), a push rod (19), a rotating shaft (20) and a lock (21); A baffle (18) is installed on the upper side of the outer wall of the signal path (17), a rotating shaft (20) is installed on the upper side of the outer wall of the baffle (18), a pushing rod (19) is installed on the upper side of the outer wall of the rotating shaft (20), and the rotating shaft (20), the pushing rod (19) and the lock (21) are connected to a switch (22) installed on the output side of the switching motor (16) through a connecting shaft.

5. The radar self-test signal cavity power splitter device with an anti-interference structure according to claim 2, characterized in that: The energy converter (8) is connected to the heat conducting pipe (23) via a connecting pipe, and the heat module comprises: a heat conducting pipe (23), a heat exchange plate (24), a temperature sensor (25) and a circulation pump (26); A heat conducting pipe (23) is installed on the lower side of the outer wall of the signal path (17), a heat exchange plate (24) is installed on the inner side wall of the cavity (1), a temperature sensor (25) is installed on the upper side of the outer wall of the signal path (17), and a circulation pump (26) is installed on the right side of the outer wall of the vibration module. The circulation pump (26) is connected to the heat conducting pipe (23) and the heat exchange plate (24) through a connecting pipe, and the circulation pump (26) is connected to the temperature sensor (25) and the storage unit (9) through a signal line.

6. The radar self-test signal cavity power splitter device with an anti-interference structure according to claim 1, characterized in that: The piezoelectric actuator (4) comprises: a first piezoelectric element (27), a pre-compression spring (28), an inertial mass block (29) and a transmission unit (30); A first piezoelectric element (27) is installed between the transducer (8) and the piezoelectric actuator (4), a preload spring (28) is installed on the edge of the first piezoelectric element (27), the preload spring (28) is fixed in the groove of the elastic base (7) through a thread, an inertial mass block (29) is installed on the top of the output side of the first piezoelectric element (27), a transmission unit (30) is installed through the middle of the inner wall of the cavity (1), and the inertial mass block (29) is connected to the transmission unit (30) through a connecting shaft.

7. The radar self-test signal cavity power splitter device with an anti-interference structure according to claim 2, characterized in that: The transducer (8) includes: a heat exchanger (31), a second piezoelectric element (32), a connecting tube (33) and an extraction circuit (34); A second piezoelectric element (32) is installed between the piezoelectric actuator (4) and the cavity (1), a heat exchanger (31) is installed in the middle of the outer wall of the second piezoelectric element (32), the heat exchanger (31) is connected to the cooling tube (39) through a connecting tube (33), and the second piezoelectric element (32) and the heat exchanger (31) are connected to the storage unit (9) through an extraction circuit (34).

8. The radar self-test signal cavity power splitter device with an anti-interference structure according to claim 2, characterized in that: The radiator (10) comprises: a fan (38) and a cooling pipe (39); Fans (38) are installed on both sides of the outer wall of the piezoelectric actuator (4), and a cooling pipe (39) is installed between the fan (38) and the piezoelectric actuator (4). The fan (38) is connected to the switch (22) installed at the output side of the switching motor (16) through a connecting shaft, and the cooling pipe (39) is connected to the circulation pump (26) through a connecting pipe.

9. The radar self-test signal cavity power splitter device with an anti-interference structure according to claim 4, characterized in that: The signal path (17) includes: an attenuator (35), a low noise amplifier (36) and a power splitter network (37); An attenuator (35) is installed on the rear side of the outer wall of the input end (3), and a low-noise amplifier (36) is installed on the rear side of the outer wall of the attenuator (35). The output side of the low-noise amplifier (36) is connected to a power division network (37). After the signal is input from the input end (3), it passes through the attenuator (35) and the attenuation is dynamically adjusted by the MCU. The low-noise amplifier (36) amplifies the signal with a gain of 20dB to 40dB, thereby improving the signal-to-noise ratio. The signal is then branched and output from the output end (2) through the power division network (37).

10. The radar self-test signal cavity power splitter device with an anti-interference structure according to claim 5, characterized in that: The circulating pump (26) comprises: a pump body (40), an impeller (41), a sealing ring (42) and a circulating motor (43); A pump body (40) is installed on the right side of the outer wall of the vibration module, an impeller (41) is installed in the middle of the inner wall of the pump body (40), the impeller (41) is connected to the circulation motor (43) through a connecting shaft, a sealing ring (42) is installed at the connection between the pump body (40) and the heat pipe (23), the heat exchange plate (24) and the cooling pipe (39) through a connecting pipe, and a circulation motor (43) is installed on the lower side of the outer wall of the pump body (40), and the circulation motor (43) is connected to the storage unit (9) through a signal line.

Images