Low-delay high-reliability wireless control synchronous release device suitable for wind tunnel test suspension model

Abstract

The invention relates to a low-delay high-reliability wireless control synchronous release device suitable for a wind tunnel test suspension model, which adopts a synchronous release scheme of fusing a model suspension line by an instant high-power synchronous heating resistance wire, and consists of a wireless remote control unit, a fusing control unit and a fusing electrode loop, the wireless remote control unit and the fusing control unit achieve low-delay remote control instruction sending and reliable data interaction through short-time-window infrared remote control communication and low-power-consumption radio frequency wireless communication, and the interference resistance and reliability of infrared remote control are improved through high-frequency narrow-pulse infrared emission, narrow-spectrum light filtering, narrow-band amplification, hardware demodulation and software detection. Self-defined delay release and independent synchronous triggering of external equipment are realized by adopting independent programmable delay and polarity configuration, and synchronous large-current discharge is realized by adopting a mode of electrically connecting all fusing electrodes in series to heat a fusing suspension wire so as to realize synchronous release of a model. According to the invention, the requirements of low delay, high reliability and high synchronization of wireless remote control in model release can be effectively met.

Description

Technical Field

[0001] This invention relates to the field of wind tunnel testing technology, specifically to a wireless remote control device for rapid release of a model in wind tunnel testing, in order to solve problems in the prior art such as large release delay, poor synchronization, weak anti-interference, and easy disturbance of model attitude and test flow field during the release process. Background Technology

[0002] In wind tunnel tests such as free flight and external model release, the model needs to be released suddenly, and the model's falling attitude must maintain a minimal deviation from its initial attitude within the effective wind tunnel test time after release. This places extremely high demands on the model release control technology, requiring not only minimal control delay and release attitude change, but also high system reliability, good repeatability, and minimal disturbance to the flow field around the model after release. Existing publicly disclosed technologies include electromagnetic release technology, mechanical cutting release technology, and thermal fuse release technology. Invention patent CN112284674A (He Chao, An Electromagnetic Suspension and Release Device for Hypersonic Wind Tunnel Model Free Flight Test, 2021-01-29) discloses an electromagnetic release technology, which mainly uses an electromagnet to attract a model with magnetically conductive materials, and then suddenly releases it when the power is cut off. This technology suffers from problems such as release delay due to magnetic hysteresis, and poor synchronization and large attitude changes during release and fall due to uneven magnetic hysteresis attraction forces at different positions or points on the attraction surface of irregularly shaped models, especially large models. The invention patent CN118980488A (Fang Zhen, Control method for low-disturbance high-response speed release device and wind tunnel test system, 2024-10-10) discloses a mechanical cutting release technology, which is mainly for rope-suspended models. It releases the model by controlling the sudden synchronous action of the blade to quickly cut the suspension rope of the model. However, it has problems such as large mechanical action delay and large actuation mechanism size, resulting in large model release delay and poor synchronization. It is also difficult to install inside the model and can only be used for cutting lines outside the model, which causes the model to fall with the rope. There are two main publicly disclosed thermal release technologies: One is a thermal release technology disclosed in invention patent CN114813028A (Liu Hongshan, A mechanical release device in a wind tunnel free-release test, 2022-07-29). This technology uses a mechanical structure to constrain the model, stores energy in a spring, and locks the mechanical structure with a constantan wire. Then, a sudden surge of electricity causes the constantan wire to melt instantly, and the spring's elastic potential energy drives the mechanical structure to release the model. This method suffers from a large delay in the mechanical structure's action and significant synchronization errors when releasing multiple models. The other is invention patent CN117782502A (Liu Shiran, A shock tunnel model suspension test device and method, 2024-03-2). 9) discloses a technology for releasing a model by melting the suspension wire of a model using a fuse. The technology consists of an external remote controller, a receiver installed inside the model, a capacitor charging device, and resistance wires attached to the suspension wires of the model. After receiving a remote control trigger signal from the remote controller, the receiver inside the model sends a control command to control the fully charged capacitor to discharge instantaneously to multiple resistance wires attached to the suspension wires in series inside the model. This causes the resistance wires to heat up rapidly, melting the suspension wires and releasing the model. When the suspension wires are made of thermally sensitive wires such as Dyneema wire and the model itself is under its own weight, the suspension wires can be quickly cut off from inside the model, so that the model's attitude is almost unaffected in scenarios such as shock tunnel tests and the flow field around the model is not affected by interference factors such as the suspension wires.However, the invention patent CN117782502A (Liu Shiran, A Shock Tunnel Model Suspension Test Device and Method, 2024-03-29) does not disclose the specific technology of fuse release control, and does not provide a clear technical solution for the problems of high control delay and anti-interference requirements in shock tunnels and other environments. Therefore, this invention mainly targets scenarios where wind tunnel models are in free flight or externally attached models are being released. Based on a fuse release scheme for multi-point suspension models, it provides a low-latency, high-reliability wireless control synchronous release device to achieve low-latency synchronous fuse release of suspension lines at multiple suspension points of the model in wind tunnel tests while ensuring reliability.

[0003] Therefore, this invention addresses the technical requirements for low-latency, high-synchronization, and high-reliability release of models in wind tunnel free-flight and external model release tests. It provides a low-latency, high-reliability wireless control synchronous release device suitable for suspended models in wind tunnel tests, solving the problems of large release delay, low synchronization accuracy, weak anti-interference ability, and insufficient reliability of existing electromagnetic release, mechanical cutting, and thermal melting technologies, as well as the additional interference to the initial attitude of the model and the test flow field caused by the movement of the release mechanism or the residue of external suspended objects. Summary of the Invention

[0004] The specific technical solution of this invention is as follows: A synchronous release scheme is adopted, which uses instantaneous high-power synchronous heating of resistance wires to fuse and break the model suspension wires. This scheme employs a split design, consisting of a wireless remote control unit, a fuse control unit, and a fuse electrode circuit. The wireless remote control unit is installed outside the wind tunnel test model and is responsible for receiving the release control signal. It then wirelessly remotely controls the fuse control unit, installed inside the model, to discharge high power to the fuse electrode circuit, thereby synchronously heating the resistance wires in all the fuse electrodes connected in series in the circuit, causing them to rapidly heat up and synchronously fuse the model suspension wires in contact with them, achieving synchronous model release. The wireless remote control unit and the fuse control unit use a dual-mode communication method combining low-latency infrared communication and low-power radio frequency communication. The wireless remote control unit uses a short-time-window high-frequency narrow-pulse modulation method to send high-power infrared remote control command signals, while the fuse control unit employs narrow-spectrum filtering, narrow-band amplification, hardware demodulation, and software detection. The system combines receiving, demodulating, and parsing infrared remote control commands to achieve hardware-level long-distance, interference-resistant, and low-latency wireless transmission and identification of fuse release commands, suppressing uncertain light pollution and thermal radiation interference in different wind tunnel test environments. The wireless remote control unit achieves reliable parameter setting and status interaction of the fuse control unit through low-power radio frequency communication. The fuse control unit consists of a low-voltage control circuit and a high-voltage energy storage and discharge circuit. It uses boost charging and high-voltage capacitor energy storage to buffer energy and uses instantaneous capacitor discharge to synchronously provide a high-power discharge current to all fuse electrodes connected in series in the fuse electrode circuit, causing them to heat up rapidly and fuse the model suspension wire. The fuse electrode adopts a separate combination structure of metal frame and insulator, with embedded resistance wire and its support. It simultaneously serves as a connector between the suspension wire and the model and as a suspension wire fuse. The resistance wire is connected in series in the fuse electrode circuit and makes reliable contact with the model suspension wire. Both the wireless remote control unit and the fuse control unit use a low-power main control chip as the control core and are powered by batteries. They each support independent programmable delays to meet the needs of custom delay fuse triggering and release under different wind tunnel test conditions. The fuse control unit also has multiple independently programmable delay synchronous trigger signal outputs for custom delay operation triggering of other devices inside the model in different wind tunnel tests.

[0005] Accordingly, a low-latency, high-reliability wireless control synchronous release device for wind tunnel test suspension models of the present invention includes: a wireless remote control unit 1, a fuse control unit 2, and a fuse electrode circuit 3.

[0006] The wireless remote control unit 1 is used to receive release control signals, generate high-power infrared fuse trigger command signals after programmable delay, trigger the fuse control unit to perform fuse operation, and has human-machine interaction functions to set parameters and display status for remote control. It consists of a remote control main control module 1a, a low-power radio frequency communication module 1b, a release control signal input module 1c, a high-power infrared transmitting module 1d, a human-machine interaction module 1e, and a power management module 1f.

[0007] The remote control main control module 1a consists of a low-power main control chip and the crystal oscillator circuit, reset circuit, and program download / debugging circuit necessary for its operation. It realizes the function of the wireless remote control unit 1 by uniformly scheduling and coordinating the collaborative work of each module in the wireless remote control unit 1 through software.

[0008] The low-power radio frequency communication module 1b consists of a low-power radio frequency communication chip and its supporting circuits. It uses mature and reliable low-power radio frequency communication technology to realize bidirectional data interaction between the wireless remote control unit 1 and the fuse control unit 2, thereby completing the parameter configuration and working status monitoring of the fuse control unit 2, ensuring good anti-interference ability and communication stability, and monitoring the communication connection through periodic heartbeat packets.

[0009] The release control signal input module 1c consists of a front-end hardware filtering circuit, a high-precision timer inside the main control chip, and related software decision-making procedures. This module employs a two-stage collaborative anti-interference mechanism of "hardware preprocessing + software time window verification." First, the input signal is preprocessed by the hardware filtering circuit to filter out high-frequency noise and fast pulse group interference. Then, under software control, the high-precision timer is invoked to perform a secondary decision on the signal pulse width based on a preset time window, thereby completely eliminating narrow pulse interference. The time window parameters used in the software decision-making are configured through the human-machine interface module 1e to adapt to the needs of different application scenarios. This design effectively suppresses various transient interferences in the input signal while ensuring a stable and reliable response of the release control signal in complex electromagnetic environments and all operating scenarios.

[0010] The high-power infrared emitting module 1d consists of a hardware circuit module comprising a high-frequency switching circuit, a switch driving circuit, a current-limiting resistor R, and a high-power infrared emitting diode IR, and a software control strategy for high-frequency, narrow-pulse infrared emission with a short time window. The low-power main control chip in the remote control main control module 1a uses software control to output a high-frequency, narrow-pulse switching signal with a short time window to control the switch driving circuit, which drives the high-frequency switching circuit connected in series in the power supply, current-limiting resistor R, and high-power infrared emitting diode IR circuit, thus controlling the infrared emitting diode IR to emit infrared remote control commands. The infrared remote control commands are divided into infrared remote control handshake commands and infrared remote control release commands based on the length of the short time window. The ultra-short window high-frequency narrow pulse control emits... The infrared remote control command is an infrared remote control handshake command, used to monitor the low-latency infrared communication connection status in real time; the infrared remote control command issued by the short-window high-frequency narrow pulse control is an infrared remote control release command, used to synchronously trigger the fuse control unit 2 in the model to control the discharge to the fuse electrode circuit 3; accordingly, the high-power infrared emitting module 1d effectively avoids electromagnetic interference in complex environments by means of infrared communication, and realizes low-latency wireless remote control by means of short-time window infrared remote control command. By combining high-frequency, narrow pulse drive with low current limiting resistor R and high-power infrared emitting tube IR, the anti-ambient light interference capability of the short-time window infrared remote control command is further improved, while increasing the wireless remote control distance while maintaining low power consumption.

[0011] The human-computer interaction module 1e consists of buttons and a display component, and is used for real-time display, convenient browsing and reliable configuration of system operating parameters.

[0012] The power management module 1f consists of a rechargeable battery, a voltage conversion circuit, and a battery management circuit. The voltage conversion circuit, composed of a DC-DC converter and a linear regulator, is responsible for converting the battery voltage to the voltage required for operation of each module in the wireless remote control unit 1, achieving stable voltage output and ripple suppression. The battery management circuit is responsible for real-time monitoring and safety management of the battery status, supporting low battery warnings and safe battery charging.

[0013] The fuse control unit 2 interacts with the wireless remote control unit 1 via radio frequency wireless communication, receiving parameter configurations and executing energy storage charging control commands. Simultaneously, this unit receives and parses infrared remote control commands from the wireless remote control unit 1, including infrared remote control handshake commands and infrared remote control release commands, and generates a fuse release control signal based on the infrared remote control release command to perform a discharge operation on the fuse electrode circuit 3. The fuse control unit 2 employs a combination of narrow-spectrum filtering, high-frequency amplification, and hardware demodulation to achieve reliable reception and demodulation of infrared remote control commands. Based on a preset programmable delay, it precisely controls the high-voltage energy storage capacitor to discharge at high power into the fuse electrode circuit 3 to execute the fuse release operation. The fuse control unit 2 can also output a synchronous trigger signal with independent programmable delay and polarity to drive external devices to work collaboratively. Accordingly, the fuse control unit 2 consists of a fuse main control module 2a, a low-power radio frequency communication module 2b, an infrared remote control receiving module 2c, a high-voltage energy storage discharge module 2d, a synchronous signal output module 2e, and a power management module 2f.

[0014] The fuse control module 2a consists of a low-power main control chip and the crystal oscillator circuit, reset circuit, and program download / debugging circuit necessary for its operation. It realizes the function of the fuse control unit 2 by uniformly scheduling and coordinating the collaborative work of each module in the fuse control unit 2 through software.

[0015] The low-power radio frequency communication module 2b adopts the same radio frequency wireless communication scheme as the wireless low-power radio frequency communication module 1b in the wireless remote control unit 1, and is used for bidirectional interactive communication between the fuse control unit 2 and the wireless remote control unit 1, so as to realize the wireless setting of the working parameters and monitoring of the working status of the fuse control unit 2 by the wireless remote control unit 1.

[0016] The infrared remote control receiver module 2c consists of an infrared receiving probe, a transimpedance amplifier circuit, a narrowband filter circuit, a hardware demodulation circuit, and an infrared remote control command software parsing and decision program. The infrared receiving probe is composed of a narrow-spectrum infrared filter and a high-sensitivity photodiode (PD). The infrared remote control command signal received by the infrared remote control receiver module 2c from the wireless remote control unit 1 is first filtered by the narrow-spectrum infrared filter on the infrared receiving probe to remove ambient light interference from other spectra, and then picked up by the high-sensitivity photodiode (PD) and converted into a photocurrent signal. The photocurrent signal output by the infrared receiving probe is amplified and filtered by the transimpedance amplifier circuit and the narrowband filter circuit to amplify the effective infrared remote control signal and filter out infrared interference of the same spectrum, thereby improving the signal-to-noise ratio. The signal after narrowband filtering enters the low-delay hardware demodulation circuit for demodulation into a short-time-window single-pulse command signal, and is sent to the digital input port of the fuse control unit 2 to blow the main control module 2a. The software program in the fuse-based main control module 2a analyzes infrared remote control commands by detecting the effective pulse level width of short-time-window single-pulse command signals. It identifies ultra-short pulse width commands as infrared remote control handshake commands and relatively long pulse width commands as infrared remote control release commands. Accordingly, the infrared remote control receiver module 2c uses a narrow-spectrum filter to filter out ambient light interference, further suppresses infrared interference in the same spectral band and improves the command signal-to-noise ratio through transimpedance amplification and narrow-band filtering, and distinguishes handshake commands from release control commands by software detection of the command pulse time window length, thereby improving the reliability of wireless infrared remote control.

[0017] The high-voltage energy storage discharge module 2d consists of a boost circuit, a single / multi-stage charging circuit, a high-voltage energy storage capacitor, a charging voltage detection circuit, a high-power discharge circuit, a bypass discharge circuit, and software control logic. The boost circuit raises the battery voltage to the high voltage required to drive the fuse electrode circuit 3 for high-power discharge. The single / multi-stage charging circuit consists of one or more solid-state switching circuits, used to charge the high-voltage energy storage capacitor using the high voltage output from the boost circuit. The single / multi-stage charging circuit comprehensively determines whether to use a single-stage or multi-stage charging scheme based on the target charging voltage, charging speed requirements, and the overall size limitations of the fuse control unit 2, and selects the corresponding specific charging stage. The high-voltage energy storage capacitor uses a large-capacity, high-voltage, and low-equivalent series resistance capacitor to maximize its energy storage capacity and discharge time constant, and to ensure that the fuse electrode circuit 3 can obtain a higher discharge voltage during high-power discharge, thereby improving discharge efficiency. The charging voltage detection circuit monitors the voltage across the high-voltage energy storage capacitor in real time and transmits the voltage signal to the input port of the fuse control module 2a for voltage feedback-based charging control. Simultaneously, the detected voltage information is transmitted back to the wireless remote control unit 1 for operational status monitoring. The high-power discharge circuit consists of a high-power switching transistor, an isolation drive circuit, and a discharge interface. The high-power switching transistor is connected in series in the high-power discharge loop between the output terminal of the high-voltage energy storage capacitor and the discharge interface. The fuse release control signal output by the fuse control module 2a drives the high-power switching transistor to conduct via the isolation drive circuit, thereby achieving high-power discharge to the fuse electrode loop 3. The bypass discharge circuit mainly consists of a manual button, a solid-state switch, and a discharge current-limiting resistor. It supports both manual operation and software control triggering modes and is used to discharge energy from the high-voltage energy storage capacitor during device testing or maintenance, ensuring that the capacitor voltage drops below a safe threshold. In terms of software control, the target voltage for single or multiple charging levels can be configured on the wireless remote control unit 1 and sent to the fuse control unit 2 via low-power radio frequency communication. The fuse release control signal that drives the high-power switching transistor to conduct is generated by the fuse main control module 2a, which supports programmable delay generation. The release control signal level width can be configured by software to adapt to the needs of different wind tunnel test scenarios. Furthermore, the pulse width of the fuse release control signal can be matched for different numbers and resistance values ​​of fuse electrodes in the fuse electrode circuit 3 to reduce resistance wire vaporization and improve operational reliability.

[0018] The synchronous trigger signal output module 2e consists of a drive buffer circuit and an independent programmable delay and programmable polarity configuration software control strategy. It is used to independently delay and output single or multiple synchronous trigger signals to other working devices after receiving trigger control commands from other devices transmitted via radio frequency wireless communication or infrared remote control release commands. The drive buffer circuit is used to convert the trigger signal output by the fuse control unit 2's fuse main control module 2a into a digital control trigger signal required for external device operation. This includes necessary isolation circuits, level conversion circuits, drive buffer circuits, or combinations thereof for different scenarios. When an isolated synchronous control output signal is required in the application, the synchronous trigger signal output module 2e must include an isolation circuit. When the logic level of the input trigger signal required by the target control device differs from the synchronous trigger signal directly output by the fuse control unit 2, the synchronous trigger signal output module 2e must include a level conversion circuit. When the current driving capability of the input trigger signal required by the target control device is large, the synchronous trigger signal output module 2e must include a drive buffer circuit. When isolation, level conversion, and drive buffering are not required in the application, the synchronous trigger signal output module 2e does not require additional circuitry and relies solely on the main control chip in the fuse main control module 2a to directly output the synchronous trigger signal. The independent delay and signal polarity configuration of each synchronous trigger signal output channel are set through the human-machine interface module 1e of the wireless remote control unit 1 and transmitted to the fuse control unit 2 for execution via low-power radio frequency wireless communication.

[0019] The power management module 2f consists of a rechargeable battery, a voltage conversion circuit, and a power management circuit. The voltage conversion circuit comprises a DC-DC converter and a linear regulator circuit, employing multiple isolated power conversion paths to provide independent and isolated stable operating power to modules with different electrical characteristics, such as the low-voltage control circuit and the high-voltage energy storage and discharge circuit. The battery management circuit is responsible for real-time monitoring and safety management of the battery status, supporting low battery warnings and safe battery charging.

[0020] The fusible electrode circuit 3 consists of one or more fusible electrodes and circuit wires. The fusible electrode adopts a separate combination structure of metal frame and insulator, with embedded resistance wire and its support, serving as both a connector between the suspension wire and the model and a suspension wire fuse. The resistance wire makes reliable contact with the model suspension wire. The resistance wires in each fusible electrode are connected in series through the circuit wire to form a circuit, which is connected to the output interface of the high-voltage energy storage discharge module 2d of the fusible control unit 2. This allows the large current released by the fusible control unit 2 to flow synchronously, thereby achieving reliable and synchronous fusing control of the suspension wires at each suspension point of the model, and thus realizing the synchronous release of the model.

[0021] The workflow of this invention is as follows: First, according to application requirements, the fuse control unit 2 and the fuse electrode circuit 3 are installed inside the model to be released. The wireless remote control unit 1 is installed outside the model at a location that does not interfere with the wind tunnel test flow field and facilitates the establishment of stable radio frequency and infrared communication with the fuse control unit 2 inside the model. The model release control signal line of the wind tunnel test system itself is connected to the interface of the release control signal input module 1c of the wireless remote control unit 1. Second, the operating parameters of the wireless remote control unit 1 and the fuse control unit 2 are set by operating the wireless remote control unit 1. Third, the wireless remote control unit 1 sends a charging preparation command to the fuse control unit 2 through radio frequency wireless communication. The fuse control unit 2 begins to control the charging of the high-voltage energy storage capacitor. After the energy storage capacitor voltage reaches the preset operating voltage, it enters a ready state waiting for the infrared remote control release command. The wireless remote control unit 1 and the fuse control unit 2 are in the ready state. The system periodically performs infrared remote control handshake commands and radio frequency wireless communication handshake commands to ensure a normal connection. Then, after receiving a valid external release control signal from the wind tunnel system, the wireless remote control unit 1 controls the high-power infrared transmitting module 1d to send an infrared remote control release command to the fuse control unit 2. The fuse control unit 2 receives and parses the infrared command as an infrared remote control release command, and immediately, or after an independently programmable delay, controls a high-power discharge to the fuse electrode circuit 3. It also outputs an independently programmable delay, polarity-specific synchronous trigger signal through the synchronous trigger signal output module 2e. Finally, after issuing the fuse release signal and the synchronous trigger signal, the fuse control unit 2 transmits the final state of this execution back to the wireless remote control unit 1 for display via low-power radio frequency communication. The voltage on the high-voltage energy storage capacitor can be discharged to a safe voltage state by operating the bypass discharge button in the fuse control unit 2. After one process is completed, the device returns to standby mode.

[0022] The advantages of this invention are as follows: It employs a short-time-window, high-frequency, narrow-pulse modulation method to transmit high-power infrared remote control commands. Combined with narrow-spectrum filtering, high-frequency amplification, narrow-band filtering, and hardware demodulation, it achieves reliable reception and parsing of infrared remote control commands, significantly improving the system's anti-interference capability in complex electromagnetic and thermal infrared interference environments. Simultaneously, it ensures low-latency remote control and a longer infrared remote control distance. Relying on a mature low-power radio frequency communication solution, it ensures reliable bidirectional interaction between parameter settings and status feedback. Through a flexibly selectable single- or multi-stage charging circuit, the charging speed can be optimized according to specific application requirements. The fuse release control signal has an adjustable pulse width, preventing overheating and vaporization or ablation of the resistance wire in the fuse electrode circuit 3 due to excessively long discharge times. Both the wireless remote control unit 1 and the fuse control unit 2 support independent programmable delays. Furthermore, the fuse control unit 2 can also delay the fuse release control signal and output synchronous trigger signals with multiple independent programmable delays, thus flexibly adapting to the diverse needs of different wind tunnel tests for release timing and multi-device collaborative triggering. In summary, this invention provides a low-latency, high-reliability wireless synchronous release device that enhances anti-interference capability, system reliability, and ease of operation, and is suitable for the precise release of suspended models in wind tunnel tests. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structural topology of a low-latency, high-reliability wireless control synchronous release device suitable for wind tunnel test suspension models according to the present invention;

[0024] Figure 2 This is a functional block diagram of the wireless remote control unit in the device of the present invention;

[0025] Figure 3 This is a schematic diagram of the circuit topology of the high-power infrared transmitting module in the wireless remote control unit of the device of the present invention.

[0026] Figure 4 This is a schematic diagram of a short-time-window high-frequency narrow-pulse switching signal from the wireless remote control unit of the device of the present invention to issue infrared remote control commands;

[0027] Figure 5 This is a functional block diagram of the fuse control unit in the device of the present invention;

[0028] Figure 6 This is a schematic diagram of the circuit topology of the infrared remote control receiver module in the fuse control unit of the present invention;

[0029] Figure 7 This is a schematic diagram of the infrared receiving probe structure in the infrared remote control receiving module of the fuse control unit of the present invention;

[0030] Figure 8This is a schematic diagram of the signal processing flow of the infrared remote control receiver module circuit in the fuse control unit of the present invention.

[0031] Figure 9 This is a schematic diagram of a single-stage charging circuit in the fuse control unit of the present invention;

[0032] Figure 10 This is a schematic diagram of a three-level charging circuit in the fuse control unit of the present invention;

[0033] Figure 11 This is a schematic diagram of a high-power discharge circuit in the fuse control unit of the present invention;

[0034] Figure 12 This is a schematic diagram of a bypass discharge circuit in the fuse control unit of the present invention;

[0035] Figure 13 This is a schematic diagram of a dual-electrode fusible electrode circuit of the device of the present invention; Detailed Implementation

[0036] The present invention will be further described below with reference to the accompanying drawings:

[0037] The core idea of ​​this invention is to address the technical challenges of low latency, anti-interference, high reliability, and synchronized release in multi-point synchronous fuse release and wireless remote control of suspended models during wind tunnel testing. This invention proposes a dual-mode communication approach combining low-latency infrared communication and low-power radio frequency wireless communication, along with a hardware-software integrated anti-interference method and a solution for synchronous discharge of fuse electrodes in series. To meet the low-latency control requirement, low-latency infrared communication based on short-time-window high-frequency narrow-pulse modulation and hardware demodulation is employed to achieve millisecond-level remote control command transmission. To address the anti-interference requirement in complex testing environments, a receiving scheme combining high-power infrared transmission with narrow-spectrum filtering, narrow-band amplification, hardware demodulation, and software detection is used to suppress optical, thermal, and electromagnetic interference. To meet the high reliability requirement, a dual-mode communication and programmable timing control system is designed for the wireless remote control unit 1 and the fuse control unit 2, supporting independent delay and multi-channel synchronous triggering to adapt to diverse testing scenarios. To address the challenge of synchronous release of multiple suspension points, all fuse electrode resistance wires are connected in series in a single loop to ensure synchronized current at each suspension point and consistent fuse action. Accordingly, the device of the present invention adopts a split design, consisting of three parts: a wireless remote control unit 1, a fuse control unit 2, and a fuse electrode circuit 3. The wireless remote control unit 1 is installed outside the wind tunnel test model and interacts bidirectionally with the fuse control unit 2 installed inside the model through low-power radio frequency wireless communication. It is responsible for receiving release control signals and sending wireless remote control commands to the fuse control unit 2 through low-latency infrared communication, controlling it to discharge high power to the fuse electrode circuit 3, thereby synchronously heating the resistance wires in all the fuse electrodes connected in series in the circuit, causing them to heat up rapidly, and then synchronously melting the suspension wires of the model that are in contact with them, so as to realize the synchronous release of the model.

[0038] The wireless remote control unit 1 is used to receive release control signals, generate high-power infrared fuse trigger command signals after a programmable delay, and trigger the fuse control unit to perform a fuse-breaking operation. It also has human-machine interaction functions for setting parameters and displaying status for remote control. Accordingly, the wireless remote control unit 1 consists of a remote control main control module 1a, a low-power radio frequency communication module 1b, a release control signal input module 1c, a high-power infrared transmitting module 1d, a human-machine interaction module 1e, and a power management module 1f. Its functional structure topology is as follows: Figure 2 As shown, the functionality of each module depends on the hardware circuitry and the software strategy within the main control chip.

[0039] The remote control main control module 1a preferably uses a low-power microcontroller as the main control chip, such as the MSP430FR series microcontroller, and consists of the crystal oscillator circuit, reset circuit, and program download / debugging circuit necessary for its operation. The module coordinates the collaborative work of each module in the wireless remote control unit 1 through unified software scheduling and coordination to realize the function of the wireless remote control unit 1.

[0040] The low-power radio frequency communication module 1b consists of a low-power radio frequency communication chip and its supporting circuits, such as Bluetooth, Zigbee or StarFlash. It uses mature and reliable low-power radio frequency communication technology to realize bidirectional data interaction between the wireless remote control unit 1 and the fuse control unit 2, thereby completing the parameter configuration and working status monitoring of the fuse control unit 2, ensuring good anti-interference ability and communication stability, and monitoring the communication connection through periodic heartbeat packets.

[0041] The release control signal input module 1c consists of a front-end hardware filtering circuit, a high-precision timer inside the main control chip, and related software decision-making procedures. This module employs a two-stage collaborative anti-interference mechanism of "hardware preprocessing + software time window verification." First, the input signal is preprocessed by a hardware filtering circuit (e.g., an RC low-pass filter composed of resistors and capacitors) to filter out high-frequency noise and fast pulse group interference. Then, under software control, the high-precision timer is invoked to perform a secondary decision on the signal pulse width based on a preset time window, thereby completely eliminating narrow pulse interference. The time window parameters used in the software decision-making are configured through the human-machine interface module 1e to adapt to the needs of different application scenarios. This design effectively suppresses various transient interferences in the input signal while ensuring a stable and reliable response of the release control signal in complex electromagnetic environments and all operating scenarios.

[0042] The high-power infrared emitting module 1d consists of a hardware circuit module comprising a high-frequency switching circuit, a switch driving circuit, a current-limiting resistor R, and a high-power infrared emitting diode IR, and a software control strategy for high-frequency, narrow-pulse infrared emission with a short time window. The low-power main control chip in the remote control main control module 1a uses software control to output a high-frequency, narrow-pulse switching signal with a short time window to control the switch driving circuit, which drives the high-frequency switching circuit connected in series in the power supply, current-limiting resistor R, and high-power infrared emitting diode IR circuit, thus controlling the infrared emitting diode IR to emit infrared remote control commands. The infrared remote control commands are divided into infrared remote control handshake commands and infrared remote control release commands based on the length of the short time window. The ultra-short window high-frequency narrow pulse control emits... The infrared remote control command is an infrared remote control handshake command, used to monitor the low-latency infrared communication connection status in real time; the infrared remote control command issued by the short-window high-frequency narrow pulse control is an infrared remote control release command, used to synchronously trigger the fuse control unit 2 in the model to control the discharge to the fuse electrode circuit 3; accordingly, the high-power infrared emitting module 1d effectively avoids electromagnetic interference in complex environments by means of infrared communication, and realizes low-latency wireless remote control by means of short-time window infrared remote control command. By combining high-frequency, narrow pulse drive with low current limiting resistor R and high-power infrared emitting tube IR, the anti-ambient light interference capability of the short-time window infrared remote control command is further improved, while increasing the wireless remote control distance while maintaining low power consumption.

[0043] Figure 4The diagram shows a short-time-window high-frequency narrow-pulse switching signal output by the remote control main control module 1a in the wireless remote control unit 1. The high-frequency narrow-pulse frequency is generally not lower than 10kHz, and the duty cycle does not exceed 1 / 3; the switching signal time window T1 corresponding to the infrared remote control handshake command generally does not exceed one-third of the switching signal time window T2 of the infrared remote control release command, and both do not exceed 1ms.

[0044] The human-machine interface module 1e consists of buttons and a display unit, used for real-time display, convenient browsing, and reliable configuration of system operating parameters. In specific implementations, the human-machine interface module 1e typically includes two or more buttons, a low-power LCD screen or digital tube, LED status indicator lights, etc.

[0045] The power management module 1f consists of a rechargeable battery, a voltage conversion circuit, and a battery management circuit. The voltage conversion circuit, composed of a DC-DC converter and a linear regulator, is responsible for converting the battery voltage to the voltage required for operation of each module in the wireless remote control unit 1, achieving stable voltage output and ripple suppression. The battery management circuit is responsible for real-time monitoring and safety management of the battery status, supporting low battery warnings and safe battery charging.

[0046] The fuse control unit 2 interacts with the wireless remote control unit 1 via radio frequency wireless communication, receiving parameter configurations and executing energy storage charging control commands. Simultaneously, the unit receives and parses infrared remote control commands from the wireless remote control unit 1, including infrared remote handshake commands and infrared remote release commands, and generates a fuse release control signal based on the infrared remote release command to perform a discharge operation on the fuse electrode circuit 3. The fuse control unit 2 employs a combination of narrow-spectrum filtering, high-frequency amplification, and hardware demodulation to reliably receive and demodulate infrared remote control commands. Based on a preset programmable delay, it precisely controls the high-voltage energy storage capacitor to discharge at high power to the fuse electrode circuit 3 to execute the fuse release operation. The fuse control unit 2 can also output a synchronous trigger signal with independent programmable delay and polarity to drive external devices to work collaboratively. Accordingly, the fuse control unit 2 consists of a fuse main control module 2a, a low-power radio frequency communication module 2b, an infrared remote control receiving module 2c, a high-voltage energy storage discharge module 2d, a synchronous signal output module 2e, and a power management module 2f; its functional structure topology is as follows: Figure 5 As shown, the functionality of each module depends on the hardware circuitry and the software strategy within the main control chip.

[0047] The fuse control module 2a preferably uses a low-power microcontroller as the main control chip, such as the MSP430FR series microcontroller, and consists of the crystal oscillator circuit, reset circuit, and program download / debugging circuit necessary for its operation. The fuse control unit 2 realizes its function by uniformly scheduling and coordinating the collaborative work of each module in the fuse control unit 2 through software.

[0048] The low-power radio frequency communication module 2b adopts the same radio frequency wireless communication scheme as the wireless low-power radio frequency communication module 1b in the wireless remote control unit 1, such as Bluetooth, Zigbee or StarFlash, for bidirectional interactive communication between the fuse control unit 2 and the wireless remote control unit 1, so as to realize the wireless setting of the working parameters and monitoring of the working status of the fuse control unit 2 by the wireless remote control unit 1.

[0049] The infrared remote control receiver module 2c consists of an infrared receiving probe, a transimpedance amplifier circuit, a narrowband filter circuit, a hardware demodulation circuit, and an infrared remote control command parsing and decision-making software program. A typical circuit topology of the infrared remote control receiver module 2c is as follows: Figure 6 As shown; the infrared receiving probe consists of a narrow-spectrum infrared filter and a high-sensitivity photodiode (PD), as follows. Figure 7 As shown. The infrared remote control command signal received by the infrared remote control receiving module 2c from the wireless remote control unit 1 is first filtered by a narrow-spectrum infrared filter on the infrared receiving probe to remove ambient light interference from other spectra, and then picked up by a high-sensitivity photodiode PD and converted into a photocurrent signal. The photocurrent signal output by the infrared receiving probe is amplified and filtered by a transimpedance amplifier circuit and a narrow-band filter circuit to amplify the effective infrared remote control signal and filter out infrared interference of the same spectrum, thereby improving the signal-to-noise ratio. A typical structure of the narrow-band filter circuit is a narrow-pass bandpass filter with gain amplification to perform secondary amplification and bandpass filtering on the signal amplified by the transimpedance amplifier circuit. The signal after narrow-band filtering enters a low-delay hardware demodulation circuit composed of a comparator circuit, a low-pass filter circuit, and a hysteresis comparator circuit, and is demodulated into a short-time-window single-pulse command signal, which is then sent to the digital input port of the fuse control unit 2a in the fuse control unit 2.

[0050] Figure 8 What is shown is Figure 6 The diagram shows the signal waveforms of each circuit node in the signal processing flow of the infrared remote control receiver module 2c. The photocurrent signal output by the infrared receiver probe is converted from an I / V signal by a transimpedance amplifier circuit to obtain a voltage signal S1. After secondary amplification and bandpass filtering by a narrowband filter circuit, it is converted into a short-time single-frequency sinusoidal signal S2. Then, it is edge-shaped by a comparator circuit to become a short-time high-frequency square wave pulse signal S3. After passing through a low-pass filter circuit, it becomes a short-time single-pulse signal S4 with a smooth edge. Finally, it is converted into a short-time window single-pulse command signal S5 with a steep edge by a hysteresis comparator circuit. The software program in the fuse control module 2a analyzes the infrared remote control command by detecting the effective pulse level width T of the short-time window single-pulse command signal S5; when T < T sh When T > T, it is determined to be an infrared remote control handshake command; sh The time is determined to be an infrared remote control release command; where T shThe value is taken as the value between the time window length T1 of the infrared remote control handshake command sent by the wireless remote control unit 1 and the infrared remote control release command T2, i.e., T1 <T sh <T2。

[0051] Accordingly, the infrared remote control receiver module 2c uses a narrow-spectrum filter to filter out ambient light interference, and uses transimpedance amplification and narrow-band filtering circuits to further suppress infrared interference in the same spectral band and improve the command signal-to-noise ratio. It also uses software detection of the command pulse time window length to distinguish between infrared remote control handshake commands and infrared remote control release commands, thereby improving the reliability of wireless infrared remote control.

[0052] The high-voltage energy storage and discharge module 2d consists of a boost circuit, a single / multi-stage charging circuit, a high-voltage energy storage capacitor, a charging voltage detection circuit, a high-power discharge circuit, a bypass discharge circuit, and software control logic.

[0053] The boost circuit typically employs an isolated DC-DC boost circuit to increase the battery voltage to the high voltage required to drive the fusible electrode circuit 3 to achieve high-power discharge, such as 100V-300V.

[0054] The single / multi-stage charging circuit consists of one or more solid-state switching circuits, used to charge the high-voltage energy storage capacitor using the high voltage output from the boost circuit. The single / multi-stage charging circuit determines whether to use a single-stage or multi-stage charging scheme based on the target charging voltage, charging speed requirements, and limitations on the overall size of the fuse control unit 2, and selects the corresponding specific charging stage. A single-stage charging circuit is used when the target charging voltage is low, the charging speed requirement is not high, or the miniaturization requirement of the fuse control unit 2 is high; conversely, if the charging speed requirement is high, a multi-stage charging circuit is used while meeting the miniaturization requirements of the fuse control unit 2. Figure 9 The diagram shows a single-stage charging circuit; the charging current of the energy storage capacitor gradually decreases as the voltage across the energy storage capacitor increases, thus causing the charging speed to gradually decrease. Figure 10 The diagram shows a three-level charging circuit. The switching of the charging level is controlled by the fuse main control module 2a based on the charging voltage feedback. When the charging voltage rises to a target voltage, it switches to the next charging level to overcome the problem that the charging current decreases and the charging speed slows down as the energy storage capacitor voltage increases.

[0055] The high-voltage energy storage capacitor uses a large-capacity, high-voltage, and low-equivalent series resistance capacitor, which aims to maximize its energy storage capacity and discharge time constant, and ensure that the fuse electrode circuit 3 can obtain a higher discharge voltage when performing high-power discharge, thereby improving the discharge efficiency.

[0056] The charging voltage detection circuit is used to monitor the voltage across the high-voltage energy storage capacitor in real time and transmit the voltage signal to the input port of the fuse main control module 2a to realize charging control based on voltage feedback; at the same time, the detected voltage information is transmitted back to the wireless remote control unit 1 for working status monitoring.

[0057] A high-power discharge circuit consists of a high-power switching transistor, an isolation drive circuit, and a discharge interface, such as... Figure 11 As shown; the high-power switching transistor is connected in series in the high-power discharge circuit between the output terminal of the high-voltage energy storage capacitor and the discharge interface; the fuse release control signal output by the fuse main control module 2a drives the high-power switching transistor to conduct through the isolation drive circuit, thereby realizing the high-power discharge of the fuse electrode circuit 3.

[0058] The bypass discharge circuit mainly consists of a manual button, a solid-state switch, and a discharge current-limiting resistor, such as... Figure 12 As shown, it supports both manual operation and software control triggering modes, and is used to release energy on the high-voltage energy storage capacitor during device testing or maintenance to ensure that the capacitor voltage drops below the safe threshold.

[0059] In terms of software control, the target voltage for single or multiple charging levels can be configured on the wireless remote control unit 1 and sent to the fuse control unit 2 via low-power radio frequency communication. The fuse release control signal that drives the high-power switching transistor to conduct is generated by the fuse main control module 2a, which supports programmable delay generation. The release control signal level width can be configured by software to adapt to the needs of different wind tunnel test scenarios. Furthermore, the pulse width of the fuse release control signal can be matched for different numbers and resistance values ​​of fuse electrodes in the fuse electrode circuit 3 to reduce resistance wire vaporization and improve operational reliability.

[0060] The synchronous trigger signal output module 2e consists of a drive buffer circuit and an independent programmable delay and programmable polarity configuration software control strategy. It is used to independently delay and output single or multiple synchronous trigger signals to other working devices after receiving trigger control commands from other devices transmitted via radio frequency wireless communication or infrared remote control release commands. The drive buffer circuit is used to convert the trigger signal output by the fuse control unit 2's fuse main control module 2a into a digital control trigger signal required for external device operation. This includes necessary isolation circuits, level conversion circuits, drive buffer circuits, or combinations thereof for different scenarios. When an isolated synchronous control output signal is required in the application, the synchronous trigger signal output module 2e must include an isolation circuit. When the logic level of the input trigger signal required by the target control device differs from the synchronous trigger signal directly output by the fuse control unit 2, the synchronous trigger signal output module 2e must include a level conversion circuit. When the current driving capability of the input trigger signal required by the target control device is large, the synchronous trigger signal output module 2e must include a drive buffer circuit. When isolation, level conversion, and drive buffering are not required in the application, the synchronous trigger signal output module 2e does not require additional circuitry and relies solely on the main control chip in the fuse main control module 2a to directly output the synchronous trigger signal. The independent delay and signal polarity configuration of each synchronous trigger signal output channel are set through the human-machine interface module 1e of the wireless remote control unit 1 and transmitted to the fuse control unit 2 for execution via low-power radio frequency wireless communication.

[0061] The power management module 2f consists of a rechargeable battery, a voltage conversion circuit, and a power management circuit. The voltage conversion circuit comprises a DC-DC converter and a linear regulator circuit, employing multiple isolated power conversion paths to provide independent and isolated stable operating power to modules with different electrical characteristics, such as the low-voltage control circuit and the high-voltage energy storage and discharge circuit. The battery management circuit is responsible for real-time monitoring and safety management of the battery status, supporting low battery warnings and safe battery charging.

[0062] The fusible electrode circuit 3 consists of one or more fusible electrodes and circuit wires. The fusible electrodes employ a separate structure design of a metal frame and insulator, embedding resistance wires and their supports. They simultaneously function as a connector between the suspension wire and the model, and as a suspension wire fuse, ensuring reliable contact between the resistance wire and the model's suspension wire. The resistance wires in each fusible electrode are connected in series via circuit wires to form a circuit, which is then connected to the output interface of the high-voltage energy storage and discharge module 2d of the fusible control unit 2. This allows the large current released by the fusible control unit 2 to flow synchronously, thereby achieving reliable and synchronous fusing control of the suspension wires at each suspension point of the model, and ultimately realizing the synchronous release of the model. A fusible electrode circuit 3 containing two fusible electrodes is described below. Figure 13 As shown.

[0063] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A low-latency, high-reliability wireless control synchronous release device suitable for wind tunnel test suspended models, employing a synchronous release scheme that uses instantaneous high-power synchronous heating of resistance wires to fuse the model's suspension wires, is used for sudden release of the model in scenarios such as wind tunnel free-flight tests or external model release. It consists of three parts: a wireless remote control unit, a fuse control unit, and a fuse electrode circuit; characterized in that: The wireless remote control unit is installed outside the wind tunnel test model. It receives the release control signal and wirelessly remotely controls the fuse control unit installed inside the model to discharge a high-power signal to the fuse electrode circuit. This synchronously heats the resistance wires in all the fuse electrodes connected in series in the circuit, causing them to rapidly heat up and simultaneously fuse the model suspension wires in contact with them, achieving synchronous model release. The wireless remote control unit and the fuse control unit use a dual-mode communication method combining low-latency infrared communication and low-power radio frequency communication. The wireless remote control unit uses a short-time-window high-frequency narrow-pulse modulation method to send high-power infrared remote control command signals, while the fuse control unit employs narrow-spectrum filtering, narrow-band amplification, and hardware decoding. The infrared remote control command is received, demodulated, and parsed using a combination of modulation and software detection, thereby achieving hardware-level long-distance, anti-interference, and low-latency wireless transmission and identification of fuse release commands, suppressing uncertain light pollution and thermal radiation interference in different wind tunnel test environments; the wireless remote control unit achieves reliable parameter setting and status interaction of the fuse control unit through low-power radio frequency communication; the fuse control unit consists of a low-voltage control circuit and a high-voltage energy storage and discharge circuit, using boost charging and high-voltage capacitor energy storage to buffer energy, and using instantaneous capacitor discharge to synchronously provide a high-power discharge current to all fuse electrodes connected in series in the fuse electrode circuit to rapidly heat up and fuse the model suspension wire; The fusible electrode adopts a separate structure design of metal frame and insulator, with embedded resistance wire and its support. It simultaneously serves as a connector between the suspension wire and the model and as a suspension wire fuse. The resistance wire is connected in series in the fusible electrode circuit and makes reliable contact with the model suspension wire. Both the wireless remote control unit and the fuse control unit use a low-power main control chip as the control core and are powered by batteries. They each support independent programmable delays to meet the needs of custom delay fuse triggering and release under different wind tunnel test conditions. The fuse control unit also has multiple independently programmable delay synchronous trigger signal outputs for custom delay operation triggering of other devices inside the model in different wind tunnel tests.

2. A low delay and high reliability wireless control and synchronization release device for a suspended model in a wind tunnel test according to claim 1, characterized in that: The wireless remote control unit 1 is used to receive release control signals, generate high-power infrared fuse trigger command signals after programmable delay, triggering the fuse control unit to perform fuse operation, and has human-machine interaction functions to set parameters and display status for remote control. It consists of a remote control main control module 1a, a low-power radio frequency communication module 1b, a release control signal input module 1c, a high-power infrared transmitting module 1d, a human-machine interaction module 1e, and a power management module 1f. The remote control main control module 1a consists of a low-power main control chip and the crystal oscillator circuit, reset circuit, and program download / debugging circuit necessary for its operation. It realizes the function of the wireless remote control unit 1 by uniformly scheduling and coordinating the collaborative work of each module in the wireless remote control unit 1 through software. The low-power radio frequency communication module 1b consists of a low-power radio frequency communication chip and its supporting circuits. It uses mature and reliable low-power radio frequency communication technology to realize bidirectional data interaction between the wireless remote control unit 1 and the fuse control unit 2, thereby completing the parameter configuration and working status monitoring of the fuse control unit 2, ensuring good anti-interference capability and communication stability, and monitoring the communication connection through periodic heartbeat packets. The release control signal input module 1c consists of a front-end hardware filtering circuit, a high-precision timer inside the main control chip, and related software decision-making programs. This module adopts a two-level collaborative anti-interference mechanism of "hardware preprocessing + software time window verification". First, the input signal is preprocessed by the hardware filtering circuit to filter out high-frequency noise and fast pulse group interference. Then, under software control, the high-precision timer is called to make a secondary decision on the signal pulse width according to the preset time window, thereby completely eliminating narrow pulse interference. The time window parameters used by the software decision are configured through the human-machine interaction module 1e to adapt to the needs of different application scenarios. This design effectively suppresses various transient interferences in the input signal while ensuring the stable and reliable response of the release control signal in complex electromagnetic environments and all working scenarios. The high-power infrared emitting module 1d consists of a hardware circuit module comprising a high-frequency switching circuit, a switch driving circuit, a current-limiting resistor R, and a high-power infrared emitting diode IR, and a software control strategy for high-frequency, narrow-pulse infrared emission with a short time window. The low-power main control chip in the remote control main control module 1a uses software control to output a high-frequency, narrow-pulse switching signal with a short time window to control the switch driving circuit, which drives the high-frequency switching circuit connected in series in the power supply, current-limiting resistor R, and high-power infrared emitting diode IR circuit, thus controlling the infrared emitting diode IR to emit infrared remote control commands. The infrared remote control commands are divided into infrared remote control handshake commands and infrared remote control release commands based on the length of the short time window. The ultra-short window high-frequency narrow pulse control emits... The infrared remote control command is an infrared remote control handshake command, used to monitor the low-latency infrared communication connection status in real time; the infrared remote control command issued by the short-window high-frequency narrow pulse control is an infrared remote control release command, used to synchronously trigger the fuse control unit 2 in the model to control the discharge to the fuse electrode circuit 3; accordingly, the high-power infrared emitting module 1d effectively avoids electromagnetic interference in complex environments by means of infrared communication, and realizes low-latency wireless remote control by means of short-time window infrared remote control command. By combining high-frequency, narrow pulse drive with low current limiting resistor R and high-power infrared emitting tube IR, the anti-ambient light interference capability of short-time window infrared remote control command is further improved, while increasing the wireless remote control distance while maintaining low power consumption; The human-computer interaction module 1e consists of buttons and a display component, and is used for real-time display, convenient browsing and reliable configuration of system operating parameters; The power management module 1f consists of a rechargeable battery, a voltage conversion circuit, and a battery management circuit. The voltage conversion circuit consists of a DC-DC converter circuit and a linear voltage regulator circuit, which is responsible for converting the battery voltage into the voltage required for the operation of each module of the wireless remote control unit 1, so as to achieve stable voltage output and ripple suppression. The battery management circuit is responsible for real-time monitoring and safety management of the battery status, and supports low battery warning and safe battery charging.

3. A low delay and high reliability wireless control and synchronization release device for a suspended model in a wind tunnel test according to claim 1, characterized in that: The fuse control unit 2 interacts with the wireless remote control unit 1 via radio frequency wireless communication, receiving parameter configurations and executing energy storage charging control commands. Simultaneously, this unit receives and parses infrared remote control commands from the wireless remote control unit 1, including infrared remote control handshake commands and infrared remote control release commands, and generates a fuse release control signal based on the infrared remote control release command to perform a discharge operation on the fuse electrode circuit 3. The fuse control unit 2 employs a combination of narrow-spectrum filtering, high-frequency amplification, and hardware demodulation to reliably receive and demodulate infrared remote control commands. Based on a preset programmable delay, it precisely controls the high-voltage energy storage capacitor to discharge at high power into the fuse electrode circuit 3 to execute the fuse release operation. The fuse control unit 2 can also output a synchronous trigger signal with independent programmable delay and polarity to drive external devices to work collaboratively. Accordingly, the fuse control unit 2 consists of a fuse main control module 2a, a low-power radio frequency communication module 2b, an infrared remote control receiving module 2c, a high-voltage energy storage discharge module 2d, a synchronous signal output module 2e, and a power management module 2f. The fuse control module 2a consists of a low-power main control chip and the crystal oscillator circuit, reset circuit, and program download / debugging circuit necessary for its operation. It realizes the function of the fuse control unit 2 by uniformly scheduling and coordinating the collaborative work of each module in the fuse control unit 2 through software. The low-power radio frequency communication module 2b adopts the same radio frequency wireless communication scheme as the wireless low-power radio frequency communication module 1b in the wireless remote control unit 1, and is used for bidirectional interactive communication between the fuse control unit 2 and the wireless remote control unit 1, so as to realize the wireless setting of the working parameters and monitoring of the working status of the fuse control unit 2 by the wireless remote control unit 1. The infrared remote control receiving module 2c consists of an infrared receiving probe, a transimpedance amplifier circuit, a narrowband filter circuit, a hardware demodulation circuit, and an infrared remote control command software parsing and decision program. The infrared receiving probe is composed of a narrow-spectrum infrared filter and a high-sensitivity photodiode PD. The infrared remote control command signal received by the infrared remote control receiving module 2c from the wireless remote control unit 1 is first filtered by the narrow-spectrum infrared filter on the infrared receiving probe to remove ambient light interference from other spectra, and then picked up and converted into a photocurrent signal by the high-sensitivity photodiode PD. The photocurrent signal output by the infrared receiving probe is amplified and filtered by the transimpedance amplifier circuit and the narrowband filter circuit to amplify the effective infrared remote control signal and filter out infrared interference of the same spectrum, thereby improving the signal-to-noise ratio. After narrowband filtering... The signal enters the low-latency hardware demodulation circuit and is demodulated into a short-time-window single-pulse command signal, which is then sent to the digital input port of the fuse control unit 2's fuse master control module 2a. The software program in the fuse master control module 2a analyzes the infrared remote control command by detecting the effective pulse width of the short-time-window single-pulse command signal, determining the ultra-short pulse width command as an infrared remote control handshake command and the relatively long pulse width command as an infrared remote control release command. Accordingly, the infrared remote control receiver module 2c uses a narrow-spectrum filter to filter out ambient light interference, uses transimpedance amplification and narrow-band filtering to further suppress infrared interference in the same spectral band and improve the command signal-to-noise ratio, and uses software detection of the command pulse time window length to distinguish between handshake commands and release control commands, thereby improving the reliability of wireless infrared remote control. The high-voltage energy storage and discharge module 2d consists of a boost circuit, a single / multi-stage charging circuit, a high-voltage energy storage capacitor, a charging voltage detection circuit, a high-power discharge circuit, a bypass discharge circuit, and software control logic. The boost circuit is used to increase the battery voltage to the high voltage required to drive the fuse electrode circuit 3 to achieve high-power discharge. The single / multi-stage charging circuit consists of one or more solid-state switching circuits, used to charge the high-voltage energy storage capacitor using the high voltage output from the boost circuit. The single / multi-stage charging circuit is determined comprehensively based on the target charging voltage, charging speed requirements, and the overall size limitations of the fuse control unit 2. A single-level or multi-level charging scheme is available, with the specific charging level selected. The high-voltage energy storage capacitor uses a large-capacity, high-voltage, and low-equivalent series resistance capacitor to maximize its energy storage capacity and discharge time constant, and to ensure that the fuse electrode circuit 3 can obtain a higher discharge voltage during high-power discharge, thereby improving discharge efficiency. The charging voltage detection circuit is used to monitor the voltage across the high-voltage energy storage capacitor in real time and transmit the voltage signal to the input port of the fuse main control module 2a for voltage feedback-based charging control. Simultaneously, the detected voltage information is transmitted back to the wireless remote control. Control unit 1 monitors the working status; the high-power discharge circuit consists of a high-power switching transistor, an isolation drive circuit, and a discharge interface; the high-power switching transistor is connected in series in the high-power discharge circuit between the output terminal of the high-voltage energy storage capacitor and the discharge interface; the fuse release control signal output by the fuse main control module 2a drives the high-power switching transistor to conduct through the isolation drive circuit, thereby realizing high-power discharge of the fuse electrode circuit 3; the bypass discharge circuit mainly consists of a manual button, a solid-state switch, and a discharge current-limiting resistor, supporting both manual operation and software control triggering modes, used to discharge energy on the high-voltage energy storage capacitor during device testing or maintenance. To ensure that the capacitor voltage drops below the safety threshold; in terms of software control, the target voltage for single or multiple charging stages can be configured on the wireless remote control unit 1 and sent to the fuse control unit 2 via low-power radio frequency communication; the fuse release control signal that drives the high-power switching transistor to conduct is generated by the fuse main control module 2a, which supports programmable delay generation, and the release control signal level width can be configured by software to adapt to the needs of different wind tunnel test scenarios, and can perform pulse width matching of the fuse release control signal for different numbers and resistance values ​​of fuse electrodes in the fuse electrode circuit 3 to reduce resistance wire vaporization and improve working reliability; The synchronous trigger signal output module 2e consists of a drive buffer circuit and an independently programmable delay and programmable polarity configuration software control strategy. It is used to independently delay and output single or multiple synchronous trigger signals to other working devices after receiving trigger control commands from other devices transmitted via radio frequency wireless communication or infrared remote control release commands. The drive buffer circuit converts the trigger signal output by the fuse control unit 2's fuse main control module 2a into a digital control trigger signal required for external device operation. This includes necessary isolation circuits, level conversion circuits, drive buffer circuits, or combinations thereof for different scenarios. When an isolated synchronous control output signal is required in the application, the synchronous trigger signal output module 2e must include an isolation circuit. When the target control device requires input... When the logic level of the trigger signal differs from that of the synchronous trigger signal directly output by the fuse control unit 2, the synchronous trigger signal output module 2e must include a level conversion circuit; when the target control device requires a large current driving capability for the input trigger signal, the synchronous trigger signal output module 2e must include a drive buffer circuit; when isolation, level conversion, and drive buffering are not required in the application, the synchronous trigger signal output module 2e does not require additional circuitry and only relies on the main control chip in the fuse main control module 2a to directly output the synchronous trigger signal; the independent delay and signal polarity configuration of each synchronous trigger signal output channel are set through the human-machine interaction module 1e of the wireless remote control unit 1 and transmitted to the fuse control unit 2 for execution via low-power radio frequency wireless communication; The power management module 2f consists of a rechargeable battery, a voltage conversion circuit, and a power management circuit. The voltage conversion circuit is composed of a DC-DC converter circuit and a linear voltage regulator circuit, and adopts multiple isolated power conversion paths to provide independent and isolated stable operating power for modules with different electrical characteristics, such as low-voltage control circuit and high-voltage energy storage and discharge circuit. The battery management circuit is responsible for real-time monitoring and safety management of the battery status, and supports low battery warning and safe battery charging.

4. The low-latency, high-reliability wireless control synchronous release device for wind tunnel test suspension models as described in claim 1, characterized in that: The fusible electrode circuit 3 consists of one or more fusible electrodes and circuit wires. The fusible electrodes adopt a separate combination structure of metal frame and insulator, with embedded resistance wire and its support. They simultaneously serve as the connection between the suspension wire and the model and the suspension wire fuse. The resistance wire is in reliable contact with the model suspension wire. The resistance wires in each fusible electrode are connected in series through the circuit wire to form a circuit, which is connected to the output interface of the high-voltage energy storage discharge module 2d of the fusible control unit 2. The large current released by the fusible control unit 2 flows synchronously through the circuit, thereby realizing reliable and synchronous fusible control of the suspension wires at each suspension point of the model, and thus realizing the synchronous release of the model.

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