CN-121994443-A - Enhanced wireless synchronous release device for multi-model wind tunnel test

Abstract

The invention relates to an enhanced wireless synchronous release device for a multi-model wind tunnel test, which consists of a wireless remote control unit, a fusing electrode loop and a remote monitoring unit. The wireless remote control unit is used for carrying out low-delay remote control instruction transmission and high-reliability data interaction through high-frequency short-code infrared communication and low-power radio frequency wireless respectively, the fusing control unit is used for receiving infrared instructions through narrow-spectrum filtering, narrow-band amplifying filtering, hardware demodulation and software code detection, the programmable delay and discharge control of a discharge window are realized based on boosting charging, high-voltage capacitor storage and digital pulse width variable chopper control, the fusing electrode loop is connected in series with a buffer inductor to improve the energy utilization efficiency, abnormal reset detection and state continuous working modes are adopted to enhance the working reliability, and the remote monitoring unit is connected with the wireless remote control unit in a wired mode to realize remote monitoring. The invention can greatly improve the anti-interference capability and reliability of the low-delay wireless remote control in the scenes such as wind tunnel model release and the like.

Inventors

• SHAO CHUNLI
• GUO JIAXING
• Yang shuanglong
• YU WANSHUN
• HAN ZEHUA

Assignees

• 安徽大学

Dates

Publication Date

20260508

Application Date

20260120

Claims (5)

1. 1. The utility model provides an enhancement mode wireless synchronous release device for multi-model wind tunnel test, based on the synchronous release scheme of resistance wire instantaneous heavy current heating fusing model suspension wire for single model or multi-model wireless remote control synchronous release in wind tunnel model free flight test or the external model release test adopts the components of a whole that can function independently design, comprises four parts of wireless remote control unit 1, fusing control unit 2, fusing electrode return circuit 3 and remote monitoring unit 4, its characterized in that: The wireless remote control unit 1 is arranged outside the models and is used for locally interactively setting working parameters and monitoring working states, meanwhile, receiving externally input model release control signals and remotely controlling the fuse control unit 2 arranged inside each model to discharge to the fuse electrode loop 3, so that synchronous release of the model is realized by synchronously heating the fuse model suspension wires, and in addition, the working parameter setting of the remote monitoring unit 4 is received and the working states are fed back in a wired communication mode, so that convenient and fast multi-model wireless synchronous fuse release of remote monitoring is realized; the wireless remote control unit 1 and the fusing control unit 2 adopt a dual-mode communication mode combining low-delay infrared short-code communication and low-power consumption radio frequency communication, the wireless remote control unit 1 transmits a model release instruction by transmitting a high-frequency short-code infrared signal, the fusing control unit 2 in each model completes the ultra-low delay reliable receiving of the high-frequency short-code infrared instruction by means of narrow-spectrum infrared filtering, transimpedance amplification, hardware demodulation and software digital code detection of an infrared receiving probe, thereby realizing low-delay fusing release remote control resisting complex electromagnetic and thermal infrared interference, the wireless remote control unit 1 realizes reliable parameter setting and state interaction of each fusing control unit 2 by low-power consumption radio frequency communication, the fusing control unit 2 adopts a mode of boosting charge and capacitor high-voltage energy storage to buffer energy, adopts a digital variable pulse width chopping control mode to control a fusing electrode loop 3 in which one or more fusing electrodes and a buffer inductor are connected in series to realize high-power short-time discharging of a programmable window, the fusing electrodes adopt a metal frame and insulator split combined structure design, the fusing electrodes are embedded with a resistor wire suspension wire and a bracket thereof, meanwhile, the function of a connecting piece between the suspension wire and the model and the function of a suspension wire fuse are born, wherein a resistance wire is connected in series in a fusing electrode loop and reliably contacts with the suspension wire of the model; the wireless remote control unit 1 and the fusing control unit 2 both adopt low-power consumption main control chips as control cores, are powered by batteries, respectively support independent programmable delay, and meet the requirements of self-defined delay fusing trigger release under different wind tunnel test conditions, and the fusing control unit 2 simultaneously outputs synchronous trigger signals with single-path or multi-path independent programmable delay so as to be used for self-defined delay work triggering of other devices in the model in different wind tunnel tests.
2. 2. The enhanced wireless synchronous release device for the multi-model wind tunnel test of claim 1, wherein the wireless remote control unit 1 takes a low-power-consumption main control chip as a control core, adopts battery power supply as a local interaction terminal and a communication control relay of the device, adopts a wired mode to receive an external model release control signal TRIG, adopts a dual-mode communication mode combining low-delay infrared coding communication and low-power-consumption radio frequency communication to send a low-delay instruction to the fusing control unit 2 and perform bidirectional data interaction, and adopts a wired communication mode to interact with the remote monitoring unit 4 so as to realize the relay functions of local working parameter interaction configuration, wireless forwarding of the model release control signal TRIG and remote monitoring, and accordingly, the wireless remote control unit 1 consists of a remote control main control module 1a, a release control signal input module 1b, an infrared instruction transmitting module 1c, a wireless radio frequency communication module 1d, a wired communication module 1e, a man-machine interaction module 1f and a power management module 1 g; The remote control main control module 1a consists of a crystal oscillator circuit, a reset circuit and a program downloading/debugging circuit which are necessary for the operation of a low-power-consumption main control chip, and the functions of the wireless remote control unit 1 are realized by uniformly scheduling and coordinating the cooperative work of all modules in the wireless remote control unit 1 through software; the software in the remote control main control module 1a carries out reset mode detection in each starting initialization stage so as to distinguish normal reset from abnormal reset, under the condition of normal reset, the software in the remote control main control module 1a sends initialization instructions to each fusing control unit 2 through a wireless radio frequency communication module 1d after carrying out state initialization on the wireless remote control unit 1 itself so as to lead each fusing control unit 2 to carry out state initialization, under the condition of abnormal reset, the software in the remote control main control module 1a reads the working process state of the wireless remote control unit 1 before abnormal reset from a nonvolatile memory and continues the execution of the working process state so as to avoid the interruption of the working process or logic confusion of the whole device caused by single-sided accidental restart of the wireless remote control unit 1 in practical application, and improve the working robustness of the device so as to avoid the failure of high-cost wind tunnel test as much as possible; The release control signal input module 1b consists of a pulse interference suppression circuit, a level conversion circuit and a pulse detection synchronous window with software programmable duration in a hardware level, and effectively avoids narrow pulse interference on a model release control signal input port through soft and hard combination, and correctly identifies an effective model release control signal TRIG exceeding a specified duration, thereby improving the working reliability of the device and avoiding ineffective triggering in a wind tunnel test; the pulse interference suppression circuit adopts an RC low-pass filter formed by resistors and capacitors or a pulse group suppression circuit comprising elements such as transient voltage suppression diodes (TVSs), piezoresistors (MOVs) or magnetic beads and the like to effectively filter high-frequency noise and pulse group interference, the level conversion circuit adopts a resistor divider circuit to realize conversion from a high-voltage logic level to a low-voltage logic level or adopts a level conversion chip to realize conversion of different logic levels so as to perform logic level conversion when the logic level of a model release control signal TRIG is not matched with the logic level of a main control chip in a remote control main control module 1a, and a pulse detection synchronous window with software programmable duration is directly realized by a timing module in the remote control main control module 1a, namely, the valid model release control signal is judged to be valid only when the valid trigger level duration of a TRIG signal exceeds the duration of the synchronous window so as to further enhance the suppression capability on narrow pulse interference; The infrared instruction transmitting module 1c consists of a hardware circuit module consisting of a communication code modulating circuit, a logic AND gate circuit, a switch driving circuit and a high-power infrared transmitting circuit and a software control strategy of high-frequency, narrow pulse and short-code infrared transmitting, the high-power infrared transmitting circuit consists of a small-resistance resistor, a high-power infrared luminotron IR and a high-frequency switch, the master control chip software in the remote control master control module 1a controls and outputs a high-frequency narrow pulse switch signal, in addition, the communication code modulating circuit is driven to output a short-code signal, the high-frequency narrow pulse switch signal and the short-code signal logically AND gate after control switch driving circuit drive the high-frequency switch in the high-power infrared transmitting circuit to do a switching action, thereby controlling the infrared transmitting tube in the high-power infrared transmitting circuit to transmit a high-power high-frequency infrared remote control instruction with short-code information, the infrared remote control instruction comprises but not limited by an infrared remote control handshake instruction and an infrared remote control release instruction, the fuse control unit 2 in each model is used for monitoring and synchronizing the connection state of low-delay infrared code, accordingly, the infrared instruction transmitting module 1c can realize the discharge to the fuse electrode loop 3 by means of the infrared communication with the help of the complex environment, the infrared communication has the capability of inhibiting the infrared interference, the infrared interference of the low-delay environment, the infrared code has the infrared interference can realize the low-delay time has the low-delay remote control instruction, and the remote control has the capability of the remote control of the low-frequency remote control information by the low-frequency remote control device has the low-delay command, and the remote control device has the low-delay environment has high interference capability, and has high interference, and has high noise, and has high resistance, and long-delay and far infrared control, and has high control and has high noise and low noise, thereby ensuring the synchronous transmission of the infrared remote control instruction with long time, high reliability, low delay and self-defined delay time; The wireless radio frequency communication module 1d adopts a low-power consumption radio frequency wireless communication scheme supporting broadcast transmission and point-to-point transmission, is used for bidirectional data interaction and heartbeat packet transmission of the wireless remote control unit 1 and the fusing control units 2 in each model so as to realize wireless setting of working parameters and monitoring of working states of the fusing control units 2, software of the wireless radio frequency communication module 1d adopts a dynamic connection management mode to maintain a list of the fusing control units 2 which are in wireless connection with the wireless remote control unit 1, so that the wireless radio frequency communication module can automatically adapt to wireless communication connection requirements of different numbers of the fusing control units 2 in different application scenes and automatically recover connection after node connection abnormality of the fusing control units 2 is eliminated, and the robustness of a system is improved; The wired communication module 1e is preferably a differential wired communication scheme, and is configured to receive a parameter setting instruction, a remote operation instruction, and a data request instruction of the remote monitoring unit 4 and perform corresponding setting, operation, and status feedback, so as to realize remote monitoring and improve application convenience; the man-machine interaction module 1f integrates keys and display components and is used for locally browsing, setting and monitoring working states of working parameters of the wireless remote control unit 1 and the fusing control units 2; The power management module 1g is composed of a voltage conversion circuit and a battery management circuit, and is responsible for converting battery voltage into voltage required by the operation of each module of the wireless remote control unit 1, and realizing battery electric quantity monitoring and charging protection control.
3. 3. The enhanced wireless synchronous release device for the multi-model wind tunnel test of claim 1 is characterized in that the fusing control unit 2 takes a low-power consumption main control chip as a control core, adopts battery power supply, consists of a low-voltage control part and a high-voltage energy storage and discharge part, is arranged in each model to be released, adopts narrow-spectrum infrared filtering, transimpedance amplification, hardware demodulation and software digital coding detection technology to realize low-delay, anti-interference and high-reliability receiving, adopts a low-power consumption radio frequency communication technology to carry out data interaction with the wireless remote control unit 1 to complete working parameter setting and state feedback, adopts a single-gear or multi-gear boosting charging technology to control rapid high-voltage charge energy storage, adopts a digital variable pulse width chopper control technology to control large-current discharge of a programmable delay and a programmable discharge time window to realize the fusing release model, and simultaneously supports synchronous trigger signal output of single-path or multi-path independent programmable delay for the work triggering of other devices in the model to be released when receiving an infrared remote control release instruction transmitted by the wireless remote control unit 1, and comprises a main control unit 2, a radio frequency module 2b, a radio frequency module 2c, a power supply module 2c and a power supply module 2g to realize the interaction and a high-voltage synchronous release module 2 f; The fusing main control module 2a consists of a crystal oscillator circuit, a reset circuit and a program downloading/debugging circuit which are necessary for the operation of the low-power-consumption main control chip, and the functions of the fusing control unit 2 are realized by uniformly scheduling and coordinating the cooperative operation of all modules in the fusing control unit 2 through software; under the condition of normal reset, the software in the fusing main control module 2a initializes the state of the fusing control unit 2, under the condition of abnormal reset, the software in the fusing main control module 2a reads the working process state of the fusing control unit 2 before abnormal reset from a nonvolatile memory and continues the execution of the working process state, so as to avoid the interruption of the working process or logic confusion of the whole device caused by the unilateral accidental restart of the fusing control unit 2 in practical application, and improve the working robustness of the device to avoid the failure of high-cost wind tunnel test as much as possible; The wireless radio frequency communication module 2b adopts the same low-power consumption radio frequency wireless communication scheme as the wireless radio frequency communication module 1d in the wireless remote control unit 1, and is used for bidirectional interactive communication between the fusing control unit 2 and the wireless remote control unit 1, so that the wireless remote control unit 1 can realize wireless setting of working parameters and monitoring of working states of the fusing control unit 2; The infrared instruction receiving module 2c consists of a hardware part consisting of a narrow-spectrum infrared filter, an infrared receiving tube, a transimpedance amplifying circuit, a narrow-band filter circuit and a hardware demodulation circuit and a software digital coding detection technology; the infrared light signal of the short-code infrared remote control instruction sent by the wireless remote control unit 1 is filtered by a narrow-spectrum infrared filter and then received by an infrared receiving tube, so that the anti-interference capability on complex infrared signals in the environment is enhanced on an optical path; the output signal of the infrared receiving tube is amplified by a transimpedance amplifying circuit and then filtered by a narrow-band filtering circuit to further inhibit infrared interference in the same spectrum band in the environment and amplify an effective infrared remote control signal, then demodulated into a short-code digital signal by a low-delay hardware demodulation circuit, sent to a digital input port of a main control chip in a fusing main control module 2a, and detected by a software digital code in the main control chip to obtain a code value of a short-code infrared remote control instruction, so that corresponding interaction or control operation is carried out according to the code value of the infrared remote control instruction; The high-voltage energy storage and discharge module 2d consists of a hardware part consisting of a boost circuit, a single/multi-gear charging circuit, a high-voltage energy storage capacitor, a charging voltage detection circuit and a discharge control circuit and a software control strategy of digital variable pulse width chopper discharge control; the boost circuit is used for boosting the low voltage supplied by the battery to the high voltage required by high-power discharge of the fusing electrode loop 3, the single/multi-stage charging circuit is composed of one or more solid-state switch circuits and is used for charging the high-voltage energy storage capacitor by adopting a high-voltage power supply output by the boost circuit, the single-stage charging circuit or the multi-stage charging circuit and a specific charging gear are comprehensively determined according to the target voltage, the charging speed and the requirement on the whole volume of the fusing control unit 3, the high-voltage energy storage capacitor adopts a high-capacity high-voltage capacitor to increase the storage energy and the discharging time constant as much as possible, the charging voltage detection circuit is used for detecting the voltage at two ends of the high-voltage energy storage capacitor in real time, feeding the voltage back to the fusing main control module 2a for software charge control after digital quantization, and simultaneously feeding the voltage back to the wireless remote control unit 1, the discharging control circuit is composed of a high-power MOS tube and an isolation driving circuit thereof, a discharging interface circuit and a bypass discharging circuit, the high-power MOS tube is connected in series in the main discharging circuit between the output of the high-voltage energy storage capacitor and the discharging interface, the high-voltage MOS tube is connected in series with the high-voltage power storage capacitor output and the discharging circuit through the solid-state switch circuit and the high-state switch circuit 2a to realize manual switch-state switch-controlled switch-on-off, the power switch-off and the power switch-off circuit is realized by the high-state switch voltage switch circuit and the high-voltage switch control circuit, and the power switch-state switch control circuit is connected to realize the manual switch control, the bypass discharge can be performed through manual control or software control so that the voltage at two ends of the high-voltage energy storage capacitor is reduced to a safe voltage range through the bypass discharge by manually discharging the electric energy on the high-voltage energy storage capacitor during the test and maintenance of the device; in the aspect of software control, a target gear voltage of single-gear charge or multi-gear charge can be programmed and set, a fusing control signal for driving on-off of a high-power MOS tube in a discharging control circuit is generated in a digital variable pulse width chopping control mode, a pulse width scheme such as a first pulse width scheme, a subsequent pulse scheme and the like is optimized to accelerate temperature rise of a resistance wire in a fusing electrode and limit maximum thermal stress, and a self-defined delay and a self-defined discharging window duration are supported, so that self-defined delayed variable pulse width chopping discharging control is carried out on the fusing electrode loop 3 according to requirements of different wind tunnel test scenes, the effective discharging window width and discharging energy are ensured, and the gasification phenomenon of the resistance wire in the fusing electrode loop 3 due to large thermal stress in an initial high-voltage discharging stage of a high-voltage energy storage capacitor is reduced, so that the service life of the resistance wire in the fusing electrode loop 3 is prolonged, and the working reliability of the device is further improved; 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, and is used for independently delaying and outputting a single-path or multi-path synchronous trigger signal to other working equipment after receiving other equipment trigger control instructions or infrared remote control release instructions transmitted by radio frequency wireless communication; the driving buffer circuit is used for converting a trigger signal output by the fusing main control module 2a in the fusing control unit 2 into a digital control trigger signal required by the operation trigger of external equipment, and comprises an isolation circuit, a level conversion circuit and a driving buffer circuit which are necessary under different scenes, wherein when the application is required to provide an isolated synchronous trigger output signal, the isolation circuit is required to be included in the synchronous trigger signal output module 2e, when the logic level of the input trigger signal required by the application target control equipment is different from the logic level of the synchronous trigger signal directly output by the fusing control unit 2, the level conversion circuit is required to be included in the synchronous trigger signal output module 2e, when the current driving capability of the input trigger signal required by the application target control equipment is large, the driving buffer circuit is required to be included in the synchronous trigger signal output module 2e, and when the application is not required to be isolated, level conversion and driving buffer, the synchronous trigger signal output module 2e does not need an additional circuit, and only depends on a main control chip in the fusing 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, and the wireless remote control unit 1 is used for carrying out the setting up of the wireless remote control unit 2 through the man-machine interaction and the wireless remote control unit 1 and carrying out the wireless remote control unit to execute the wireless radio frequency control; the man-machine interaction module 2f integrates keys and display components, is used for locally performing bypass discharge through the keys and monitoring the working state of the fusing control unit 2, and can also be used for locally browsing and setting working parameters of the fusing control unit 2; The power management module 2g is composed of a voltage conversion circuit and a battery management circuit, and is responsible for converting the battery voltage into the voltage required by the operation of each module of the fusing control unit 2, and realizing the monitoring of the battery electric quantity and the charging protection control.
4. 4. The enhanced wireless synchronous release device for a multi-model wind tunnel test according to claim 1, wherein the fusing electrode loop 3 consists of one or more fusing electrodes, a buffer inductor and wires for connecting the fusing electrodes and the buffer inductor in series, the quantity of the fusing electrodes is determined according to the suspension requirement of an actual model, the fusing electrodes are designed by adopting a split combined structure of a metal frame and an insulator, embedded resistance wires and supports thereof are arranged at suspension points in the model, the embedded resistance wires are in contact with the suspension wires of the model, the function of connecting pieces between the suspension wires and the model and the function of a suspension wire fuse are simultaneously born, the resistance wires and the buffer inductor in all the fusing electrodes are connected in series on a discharge output interface of a high-voltage energy storage discharge module 2d of the fusing control unit 2 through the wires so as to synchronously flow through large current released by the fusing control unit 2, and the buffer inductor is matched with a reversely parallel high-power diode on the discharge interface of the fusing control unit 2 so as to continuously heat the resistance wires in the fusing electrodes, the suspension wires at the fusing electrodes are synchronously heated, and the suspension wires at the suspension points on the fusing electrodes are synchronously released, and the model is synchronously released.
5. 5. The enhanced wireless synchronous release device for the multi-model wind tunnel test, as set forth in claim 1, wherein the remote monitoring unit 4 is a device comprising an input function, a display function and a communication function matched with the wired communication module 5 in the wireless remote control unit 1, and is used for performing remote bidirectional interactive communication with the wireless remote control unit 1, so as to realize remote setting and state monitoring of the working parameters of the wireless remote control unit 1 and the fusing control unit 2, thereby providing a safe and reliable remote monitoring function for application scenes, particularly dangerous wind tunnel test scenes, facilitating timely detection and treatment of abnormal situations in application, and reducing invalid test situations.

Description

Enhanced wireless synchronous release device for multi-model wind tunnel test Technical Field The invention relates to the technical field of wind tunnel tests, in particular to a single-model or multi-model wireless remote control synchronous release device used in a free flight test or an externally-hung model release test of a wind tunnel model, which aims to solve the problems of insufficient anti-interference capability, high delay, poor reliability, low usability and the like of the existing synchronous release technology. Background In wind tunnel tests such as free flight and external model release, the model needs to be suddenly released, and the falling gesture and the initial gesture of the model in the effective wind tunnel test time after release are required to keep extremely small deviation. The method has the advantages of high requirements on the model release control technology, small control delay, small release gesture change, high system reliability, good repeatability and small interference on the flow field around the released model. The prior art mainly comprises an electromagnetic release technology, a mechanical cutting release technology and a thermal fusing release technology. The invention patent CN112284674A (He Chao, an electromagnet suspension throwing device for a hypersonic wind tunnel model free flight test, 2021-01-29) discloses an electromagnetic release technology, which is characterized in that the problems of large delay, poor release synchronism and the like caused by hysteresis exist through an electromagnet adsorption model and then sudden power-off release, and the surface of the model is required to be provided with a magnetic conduction material for adsorption. The invention patent CN118980488A (square vibration, low disturbance high response speed releasing device and control method of wind tunnel test system, 2024-10-10) discloses a mechanical cutting releasing technology, which adopts a rope hanging model, and rapidly cuts off the model hanging rope through controlling the sudden action of a blade so as to release the model, and has the problems of large mechanical action delay, poor synchronism, large volume of an actuating mechanism and the like, and the problem that the actuating mechanism is difficult to install in the model, and residual rope exists on the model after cutting release so as to easily disturb a flow field. The invention patent CN114813028A (Liu Hongsha, a mechanical throwing device in a wind tunnel free throwing test, 2022-07-29) discloses a thermal fusing release technology, wherein a mechanical structure is restrained by a mechanical structure constraint model, a spring stores energy and is locked by a constantan wire, and then the constantan wire is suddenly electrified and fused to unlock the mechanical structure and realize model release by means of spring force, so that the problems of large action delay of the mechanical structure and large synchronous error of multi-model release are also existed, and the adjustment is difficult. The invention patent CN117782502A (Liu Shiran, a shock tunnel model suspension test device and method, 2024-03-29) is disclosed which comprises an external remote control, a receiver mounted inside the mould, a release mechanism for the suspension wire of the fuse-blowing mould, The device comprises a capacitor charging device and a resistance wire which is tightly attached to a model suspension wire, wherein a receiver in the model receives a remote control trigger signal sent by a remote controller and then sends a control command to control a fully charged capacitor to instantly discharge to a plurality of resistance wires which are tightly attached to the suspension wire in the model, so that the resistance wire is quickly heated and fused to realize model release, and under the condition that the suspension wire adopts a thermosensitive wire such as a high force Ma Xian and the self gravity of the model, the model suspension wire can be quickly fused from the inside of the model, thereby the model can be released and dropped almost unaffected under the conditions of shock tunnel test and the like under ideal conditions, and a flow field around the model is free from the influence of interference factors such as the suspension wire. however, in the invention patent CN117782502a (Liu Shiran, a shock tunnel model suspension test device and method, 2024-03-29), a specific technology of fuse release control is not disclosed, and in particular, specific technical schemes are not provided for the millisecond delay requirement of the shock tunnel test, the complex electromagnetic and thermal infrared interference problem caused by the operation of multiple devices in the model in a vacuum environment, and the problem of short service life caused by the easy gasification of a resistance wire under the condition of heavy current discharge, so that the problems of large delay, false triggering, short ser