A comprehensive test system and test method for an electronic automatic parachute opener

Abstract

The present invention discloses a comprehensive testing system and method for an electronic automatic parachute opener. The system comprises a control cabinet, a vacuum test chamber, an atmospheric data measuring instrument, and a temperature chamber. The control cabinet is connected to the atmospheric data measuring instrument via a communication cable, the atmospheric data measuring instrument is connected to the vacuum test chamber via an air pipe, the control cabinet is connected to the vacuum test chamber via a communication cable, and the control cabinet is connected to the temperature chamber via a communication cable. The vacuum test chamber is placed within the temperature chamber. The vacuum test chamber is used to simulate the unlocking environment of the electronic automatic parachute opener. This invention enables automated testing and verification of the performance of the electronic automatic parachute opener, reducing the testing workload of the electronic automatic parachute opener system and shortening the testing cycle.

Description

Technical Field

[0001] The invention belongs to the technical field of testing aviation lifesaving equipment and relates to a comprehensive testing system and a testing method for an electronic automatic parachute opener. Background Art

[0002] A parachute is a critical aviation tool used by airborne troops during combat and training missions, and by skydiving enthusiasts for aerial sports. During use, a parachute expands from its collapsed state, unlocked by the parachute opener. This release utilizes the air resistance experienced during descent to achieve mid-air deceleration and a safe landing. The parachute opener is the core control device for parachute opening. Its performance and reliability directly impact the ability of the parachute to open under specified conditions, and thus the safety of the user. Therefore, pre-shipment performance testing of the parachute opener, as well as regular performance testing during use, is crucial to ensuring its reliability.

[0003] The present invention relates to an electronic automatic parachute opener performance comprehensive testing system capable of realizing automated testing of multiple key performance indicators of the electronic automatic parachute opener.

[0004] In recent years, with the complex and changeable geographical environment conditions during airborne combat training, the performance requirements for the supporting parachute openers have become increasingly higher; from the development of mechanical parachute openers to electronic automatic parachute openers, the performance of parachute openers has been greatly improved; electronic automatic parachute openers have the characteristics of high performance index testing requirements, strong applicability of test environment, large output and large quantity.

[0005] The electronic automatic parachute opener's main principle is to use a microcontroller to detect altitude through a pressure sensor and calculate the rate of altitude change during descent (i.e., descent velocity) using a dedicated algorithm. This determines whether the altitude and descent speed of the electronic automatic parachute opener meet the requirements for deployment. When the requirements are met, an electrical signal is output to activate the pyrotechnic cutter, severing the cord on the parachute bag and deploying the parachute. The comprehensive electronic automatic parachute opener test system provides a simulated vacuum environment with adjustable altitude and speed. It also allows for the insertion and removal of soft-lock pins, captures the electrical signal triggered by the parachute opener's unlocking, and records the simulated altitude and speed values ​​at that time. It also enables online editing of electronic automatic parachute opener parameters.

[0006] Currently, test devices for parachute openers are mainly used for performance testing of traditional mechanical parachute openers. For example, the invention patent with authorization announcement number CN 112731789 B, "A device and method for detecting time of an opener," protects a device and method for testing the opening time of a traditional mechanical parachute opener. This patent is inconsistent with the performance testing items of electronic automatic parachute openers and cannot meet the high-performance testing requirements of electronic automatic parachute openers. In addition, the performance of only one parachute opener can be tested at a time, resulting in low efficiency.

[0007] Therefore, there is an urgent need for an automated device for comprehensive testing of electronic automatic parachute openers to meet the actual requirements of high-performance testing of batch electronic automatic parachute openers. Summary of the Invention

[0008] The purpose of the present invention is to provide a comprehensive test system and test method for an electronic automatic parachute opener. The present invention realizes automated test and verification of the performance of the electronic automatic parachute opener, thereby reducing the test workload of the electronic automatic parachute opener system and shortening the test cycle.

[0009] The technical solution of the present invention is: a comprehensive testing system for an electronic automatic parachute opener, characterized in that it includes a control cabinet, a vacuum test chamber, an atmospheric data measuring instrument and a high and low temperature chamber; the control cabinet is connected to the atmospheric data measuring instrument via a communication cable, the atmospheric data measuring instrument is connected to the vacuum test chamber via an air pipe, the control cabinet is connected to the vacuum test chamber via a communication cable, the control cabinet is connected to the high and low temperature chamber via a communication cable, and the vacuum test chamber is placed in the high and low temperature chamber; the vacuum test chamber is used to simulate the unlocking environment of the electronic automatic parachute opener.

[0010] In the aforementioned electronic automatic parachute opener comprehensive test system, the vacuum test chamber includes a vacuum chamber, a middle-layer mounting plate assembly, and a soft-lock needle drive assembly; the middle-layer mounting plate assembly is horizontally installed in the middle of the vacuum chamber, dividing the vacuum chamber into upper and lower spaces; the soft-lock needle drive assembly is installed in the lower space of the vacuum chamber, and a vacuum chamber cover is provided on the top of the vacuum chamber. The vacuum chamber cover realizes 120° opening and closing of the moving shaft through the cam structure on the rotating frame; there is a rectangular groove on the upper surface of the vacuum chamber, and a vacuum sealing gasket is pasted on the lower surface of the vacuum chamber cover, which is matched with the moving shaft closing structure to ensure When the cover is closed, the lower surface of the cover coincides with the upper surface of the vacuum box, and the four flower-shaped handles are rotated 180° and then tightened so that the middle protrusion of the vacuum sealing gasket is embedded in the rectangular groove, thereby achieving a tight fit between the cover and the vacuum box; the lower part of the space of the vacuum box is separated by a partition, and the enclosed space formed by the partition, the middle mounting plate assembly and the vacuum box is used to install the power device, communication cable, control cable and filler of the soft lock needle drive assembly; the other part of the space formed by the partition and the vacuum box is connected to the upper space of the vacuum box, and is used to accommodate the cable of the electronic automatic umbrella opener.

[0011] In the aforementioned electronic automatic parachute opener comprehensive test system, the middle-layer mounting plate assembly includes a middle-layer mounting plate, a parameter setting line pressure plate, a parameter setting line, a parachute opener host mounting slot, a cable pressure plate, a cutter signal test line, a parachute opener handheld device mounting slot, a clamping mechanism, a handheld device pressure plate, a hinge and a pressure pad; a runway-shaped hole is left on one side of the middle-layer mounting plate, and the parameter setting line connector can pass through the hole, and is fixedly connected to the middle-layer mounting plate through the parameter setting line pressure plate with a semicircular hole on the side, so that the parameter setting line connector is effectively positioned; a large circular hole is left in the middle of the middle-layer mounting plate, and the cutter signal test line is The signal test line connector can pass through the hole and is fixedly connected to the middle mounting plate through the cable pressure plates with semicircular holes on the two sides, so that the cutter signal test line connector can be effectively positioned. The umbrella opener host mounting slot is fixedly mounted on the middle mounting plate and is used to install the electronic automatic umbrella opener host; the umbrella opener handheld device mounting slot is fixedly mounted on the middle mounting plate and is used to install and position the electronic automatic umbrella opener handheld device; the pressure plate is connected to the umbrella opener handheld device mounting slot through a hinge to achieve 95° rotation opening and closing; a pressure pad is pasted under the pressure plate, and when the pressure plate is closed, the pressure plate is pressed by the clamping mechanism.

[0012] In the aforementioned electronic automatic parachute opener comprehensive test system, the soft lock pin drive assembly includes a low-temperature module, a low-temperature servo motor, a limit switch, a dust cover, a soft lock pin bracket, and a modified soft lock pin assembly; the modified soft lock pin assembly is installed on the soft lock pin bracket, the soft lock pin bracket and the dust cover are installed on the low-temperature module slider, and the low-temperature servo motor is installed on the low-temperature module to convert the shaft rotation into slider movement, drive the soft lock pin bracket and the dust cover to move horizontally, and then drive the modified soft lock pin assembly to move horizontally to realize the plug-in and pull-out action; one side of the middle mounting plate contains a rectangular hole, and the soft lock pin bracket The bracket passes through the rectangular hole and is fastened to the slider on the low-temperature module, and through the dust cover installed on the slider and the flexible accordion cover installed on the soft lock pin bracket and the middle mounting plate, the flexible accordion cover shrinks during the insertion and removal of the soft lock pin bracket to ensure that the rectangular hole is always closed; the modified soft lock pin bracket contains a runway-shaped hole, and the modified soft lock pin assembly passes through the runway-shaped hole to adjust the position of the modified soft lock pin so that the modified soft lock pin is aligned with the soft lock pin socket of the handheld device, and the modified soft lock pin assembly is tightened so that the modified soft lock pin can be normally inserted and removed from the soft lock pin socket of the handheld device to achieve locking and unlocking actions.

[0013] In the aforementioned electronic automatic parachute opener comprehensive test system, the atmospheric data measuring instrument is connected to the pressure control nozzle of the vacuum test chamber through an air pipe.

[0014] In the aforementioned comprehensive test system for electronic automatic parachute openers, the vacuum test chamber equipped with the electronic automatic parachute opener can be placed inside a high and low temperature chamber to achieve continuous performance testing of the electronic automatic parachute opener under three environmental conditions: normal temperature, high temperature, and low temperature, thereby more accurately testing the performance of the electronic automatic parachute opener under different environmental conditions.

[0015] The test method of the aforementioned electronic automatic parachute opener comprehensive test system is as follows:

[0016] Step 1: Place the vacuum test chamber, control cabinet, atmospheric data measuring instrument, and high and low temperature chamber together, and connect them via communication cables and air pipes to form a comprehensive test system for electronic automatic parachute openers.

[0017] Step 2: Power on and preheat for 10 minutes, and then the atmospheric data measuring instrument will do a self-test.

[0018] Step 3: Install the electronic automatic parachute opener to be tested in a vacuum test chamber, close the lid and seal it, and then place it in a high and low temperature chamber;

[0019] Step 4: Set the performance parameters of the electronic automatic parachute opener, the parameters of the atmospheric data measuring instrument and the temperature information of the high and low temperature chamber through the control cabinet;

[0020] Step 5: Control the soft lock pin to move and insert it into the electronic automatic parachute opener;

[0021] Step 6: Control the atmospheric data measuring instrument to apply pressure to the vacuum test chamber at a preset rate, thereby establishing a simulated high-altitude environment with a specified ascent speed and altitude in the vacuum test chamber;

[0022] Step 7: After reaching the preset height, control the soft lock pin to pull out, that is, apply the unlock control information;

[0023] Step 8: Control the air pressure in the vacuum chamber to drop at a specified rate. When the specified height is reached, the electronic automatic parachute opener is unlocked and the cutter releases an electrical signal. At this time, the cutter signal test line collects the cutter's electrical signal. During this process, the height and descent speed information in the vacuum chamber near the specified height point, as well as the corresponding time information, are recorded in real time.

[0024] Step 9: Find the corresponding air pressure height value and descent speed value in the vacuum test chamber when the cutter electrical signal is collected, determine whether it meets the requirements, and output a report;

[0025] Step 10: After the test is completed, the next test is performed in a loop.

[0026] In step 8 of the test method of the aforementioned electronic automatic parachute opener comprehensive test system, when the parachute opener is unlocked, a dedicated circuit is used to capture the short signal and delay the signal for a period of time, so that the control cabinet can effectively capture the signal and record the corresponding time value; the cutter electrical signal is input into the dedicated circuit, the signal is isolated by the photoelectric coupler, and enters the positive electrode of the photoelectric coupler after current limiting by the resistor. The collector of the photoelectric coupler is indirectly connected to the 5V power supply through a pull-up resistor. When the cutter signal is input into the photoelectric coupler, the potential between the collector of the photoelectric coupler and the pull-up resistor is briefly pulled down from 5V to 0V and then restored to 5V. The signal is connected to the delay circuit, which is mainly composed of a monostable The monostable multivibrator is composed of a monostable multivibrator and peripheral resistors and capacitors. The input end of the delay circuit captures the falling edge of the level change, and its output end outputs a change from a low level of 0V to a high level of 5V. At the same time, after the monostable multivibrator is triggered, it charges the peripheral capacitor. When the input becomes a low level, the output end of the delay circuit discharges through the charged capacitor and resistor, thereby continuing the high level state of the output end. By selecting appropriate capacitors and resistors, the continuous output time of the high level can be determined; at the same time, connecting the output end of the delay circuit to a bipolar buffer can improve the load capacity of the dedicated circuit and give the output end of the dedicated circuit a certain level signal, further improving the anti-interference ability of the circuit.

[0027] In step 9 of the aforementioned test method for the electronic automatic parachute opener integrated test system, at the time the cutter signal is captured, multiple altitude values ​​and multiple altitude descent speed values ​​recorded closest to that time are found, and functional relationships between the multiple altitude values ​​and multiple altitude descent speed values ​​and the time value are established. The altitude value and altitude descent speed value corresponding to the time the cutter signal is captured are calculated; a report is then generated to automatically calculate the parachute opening altitude and speed error values.

[0028] The advantages of the present invention are: Under the premise of single-time installation and positioning of the electronic automatic parachute opener, the present invention satisfies comprehensive performance testing of electronic automatic parachute openers under three operating conditions: high temperature, low temperature, and normal temperature. The system creates a simulated high-altitude pressure environment with adjustable parameters for the electronic automatic parachute opener, enabling the parachute opener to operate under ground conditions. The system can simultaneously install and fix multiple electronic automatic parachute openers, and automatically lock and unlock the electronic automatic parachute openers. The system uses a dedicated circuit to collect instantaneous cutter signals emitted by the electronic automatic parachute opener and uses a dedicated algorithm to process the data, ensuring accurate and reliable data collection. The system can remotely set the parameters of multiple parachute openers online, avoiding repeated manual unpacking, waiting, and parameter setting. The comprehensive testing system for electronic automatic parachute openers has good human-computer interaction and accurate and reliable data collection. Traditional mechanical parachute opener testing equipment can only realize single data measurement of a single parachute opener at room temperature. Completing the measurement of all data of a single parachute opener at room temperature, high temperature and low temperature requires multiple manual operations of the test bench, mechanical parachute opener, high and low temperature chamber, etc., and manual recording of data, with a low degree of automation. In comparison, the test system and method involved in the present invention can shorten the effective time of the original parachute opener test to about 1 / 30, significantly improving the test efficiency; the test chamber of traditional mechanical parachute opener testing equipment simulates the height of the space, has low control sensitivity and low test accuracy. In comparison, the test system and method involved in the present invention can effectively improve the original parachute opener test accuracy by about 10 times, and has good practical application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is the schematic diagram of the comprehensive test system for electronic automatic parachute openers.

[0030] Figure 2 This is a schematic diagram of the vacuum test chamber structure.

[0031] Figure 3 Schematic diagram of the vacuum box structure (open cover state).

[0032] Figure 4 Schematic diagram of the vacuum box structure (closed state).

[0033] Figure 5 Schematic diagram of the cover flip structure

[0034] Figure 6 This is a schematic diagram of the middle-layer mounting plate assembly structure.

[0035] Figure 7 It is a schematic diagram of the structure of the clamping mechanism.

[0036] Figure 8 This is a schematic diagram of the soft lock needle drive component structure.

[0037] Figure 9This is a flow chart for comprehensive performance testing of electronic automatic parachute openers.

[0038] Figure 10 Schematic diagram of a dedicated circuit for collecting cutting signals

[0039] In the figure: 1-vacuum box, 2-middle mounting plate assembly, 3-soft lock needle drive assembly, 101-vacuum box, 1011-rectangular groove, 102-partition, 103-flower handle, 104-filler, 105-flexible accordion cover, 106-vacuum box cover, 107-vacuum sealing pad, 108-pressure control nozzle, 109-detection nozzle, 110-parameter setting port, 111-pneumatic port, 112-cutter test port, 113-control port, 114-rotating frame, 1141-rotating frame cam, 1142-rotating frame waist hole, 115-moving shaft, 116-clamping seat, 1161-clamping seat cam, 201-middle mounting plate, 202-parameter setting Wire pressure plate, 203-parameter setting line, 204-parachute opener host installation slot, 205-electronic automatic parachute opener host, 206-cable pressure plate, 207-cutter signal test line, 208-parachute opener handheld device installation slot, 209-cylindrical pin, 210-clamping mechanism, 2101-clamping mechanism mounting support, 2102-spring, 2103-locking mechanism pressure plate, 2104-clamping sleeve, 211-handheld device pressure plate, 212-electronic automatic parachute opener handheld device, 213-hinge, 214-pressure pad, 301-low temperature module, 302-limit switch, 303-dust cover, 304-low temperature servo motor, 305-soft lock pin bracket, 306-modified soft lock pin assembly. DETAILED DESCRIPTION

[0040] The present invention will be further described below with reference to the accompanying drawings and examples, but they are not intended to limit the present invention.

[0041] Example 1. See Figures 1-10 , an embodiment of the present invention provides an electronic automatic parachute opener comprehensive test system, the electronic automatic parachute opener comprehensive test system mainly includes a control cabinet, a vacuum test chamber, an atmospheric data measuring instrument and a high and low temperature chamber; the components are connected by air pipes, control cables and communication cables, and are controlled by dedicated test software to form a comprehensive test system, which can realize the installation, fixation, automatic locking and unlocking of 5 electronic automatic parachute openers; and realize the online setting of the parachute opening parameters of the 5 electronic automatic parachute openers, the control of the height and change speed of the simulated space in the vacuum test chamber, the precise control of the plug-in and pull-out status of the 5 soft lock pins, the precise capture of the unlocking signals of the 5 electronic automatic parachute openers, the correction and processing of the 5 groups of signal data, and then complete the automatic comprehensive test of the height-speed mode performance of the 5 electronic automatic parachute openers, and realize the interaction of human-computer information through the display. Among them:

[0042] The control cabinet mainly includes an industrial computer, drawers, a drawer keyboard assembly, a serial port adapter box, resistors, a circuit board assembly, a servo motor driver, and is connected by lines. A communication interface and a control interface for connecting to a vacuum test chamber, an atmospheric data measuring instrument, and a high and low temperature chamber are reserved on the front panel of the cabinet. Through the control of a dedicated software program, it is possible to control the height and height change speed of the simulated space in the vacuum test chamber, set the parameters of the electronic automatic parachute opener online, accurately control the plugging and unplugging status of the soft lock pin, accurately capture the unlocking signal of the electronic automatic parachute opener, correct and process the signal data, and then complete the height-speed mode performance test of the electronic automatic parachute opener, and realize human-computer information interaction through the display.

[0043] The serial port adapter box can convert the parameter signal output by the USB of the electronic automatic parachute opener into an RS232 signal, connect and communicate with the computer via PCI, and realize the calculation and display of the parameter signal and parameter setting through dedicated software, and transmit it back to the electronic automatic parachute opener, thereby realizing the online setting of the parameters of the electronic automatic parachute opener;

[0044] The servo motor driver is used to drive the low-temperature servo motor in the vacuum test chamber to rotate, thereby controlling the precise movement of the slider on the module, thereby driving the soft lock pin to complete the plugging and unplugging action, realizing precise control of the plugging and unplugging status of the soft lock pin, and then completing the locking and unlocking action.

[0045] The resistor is selected based on the current in the cutter when the electronic automatic parachute opener releases the unlocking signal, and is used to replace the consumable cutter to complete the unlocking signal measurement;

[0046] The circuit board assembly uses a dedicated circuit to accurately and reliably collect the current signal in the resistor at the unlocking moment (less than 10ms), and transmits the collected current signal to the industrial computer through the data acquisition card. The industrial computer records the corresponding time value through dedicated software.

[0047] Vacuum test chamber (see Figure 2 ), the vacuum test chamber mainly includes a vacuum box body 1, a middle-layer mounting plate assembly 2, and a soft lock pin drive assembly 3, which are used to establish a simulation space for comprehensive performance testing of an electronic automatic umbrella opener, and realize automatic locking, unlocking, and signal transfer functions; the middle-layer mounting plate assembly 2 is horizontally installed in the middle of the vacuum box body 101, positioned by a cylindrical pin 209, and fixedly connected to the support boss of the vacuum box body 101 by a countersunk screw, dividing the vacuum box body 1 into upper and lower spaces; the soft lock pin drive assembly 3 is installed at the bottom of the vacuum box body 101 and fixed to the bottom of the vacuum box body 101 by screws.

[0048] The vacuum box 1 mainly includes a vacuum box 101, a rotating frame 114, a vacuum box cover 106, a vacuum sealing gasket 107, a flower-shaped handle 103, a partition 102, a filler 104, a flexible accordion cover 105, a pressure control nozzle 108, a detection nozzle 109, a pneumatic port 111, a parameter setting port 110, a cutter test port 112 and a control port 113, etc. Various signals can be transferred to the outside of the box while ensuring sealing, so as to simulate the high-altitude pressure environment when an electronic automatic parachute opener opens the parachute, that is, to establish a vacuum pressure enclosed space that changes with altitude. A clamping seat 116 is installed on the vacuum box cover 106, and the rotating frame 114 contains a rotating frame waist-shaped hole 1142. The dynamic shaft 115 passes through the rotating frame waist-shaped hole 1142 and is fixedly connected to the clamping seat 116, wherein the dynamic shaft 115 can move in the waist-shaped hole to realize the rotation of the vacuum box cover 106 around the dynamic shaft 115, so that when the vacuum sealing gasket 107 is compressed, the cover 106 and the vacuum box body 101 are tightly fitted to ensure that the vacuum box body 1 has good sealing performance; wherein the clamping seat 116 and the rotating frame 114 are connected through the clamping seat cam 1161 and the rotating frame cam 1141, which can realize the cover 106 to rotate 120° around the dynamic axis, that is, the cover can be opened and closed 120°.

[0049] There is a rectangular groove 1011 on the upper surface of the vacuum box 101, and a vacuum sealing gasket 107 is pasted on the lower surface of the vacuum box cover 106. It is equipped with a dynamic shaft closing structure to ensure that the lower surface of the cover 106 coincides with the upper surface of the vacuum box 101 when the cover is closed. The four flower-shaped handles 103 are rotated 180° and then tightened so that the middle protrusion of the vacuum sealing gasket 107 is embedded in the rectangular groove 1011, thereby achieving a close fit between the cover 106 and the vacuum box 101, thereby effectively ensuring that the vacuum box 1 has good sealing performance. Partition 102 is installed vertically on one side of the lower space of vacuum chamber 101, separating the lower space. The enclosed space formed by partition 102, middle mounting plate assembly 2, and vacuum chamber 101 is used to install the power unit of soft lock needle drive assembly 3, communication cables, control cables, and filler 104. Filler 104 is made of high-density sponge material, effectively filling the empty space within the enclosed space, reducing the effective vacuum volume within vacuum chamber 101 and facilitating the regulation of vacuum pressure within vacuum chamber 1. Another portion of the space communicates with the upper space of vacuum chamber 101 and accommodates the cables of electronic automatic parachute openers 205 and 212. Pressure control nozzle 108 is threadedly connected to vacuum chamber 101 and sealed with raw tape. It can be connected to an external atmospheric data measuring instrument to regulate the air pressure within vacuum chamber 101. The detection nozzle 109 is connected to the vacuum box 101 via a threaded connection and is sealed with adhesive tape. It can be used to connect an external pressure sensor to monitor the pressure inside the vacuum box 101. When monitoring is not required, the nozzle plug can be used to plug the interface. The parameter setting port 110 is tightly connected to the outer wall of the vacuum box 101 using a sealed electrical connector. The inner side is connected to the electronic automatic umbrella opener parameter setting port via the parameter setting line 203. The outer side can be connected to other components to realize the parameter signal transfer function. The cutter test port 112 is tightly connected to the outer wall of the vacuum box 101 using a sealed electrical connector. The inner side is connected to the electronic automatic umbrella opener handheld device 212 via the cutter signal test line 207. The outer side can be connected to other components to realize the cutting electrical signal transfer function. The control port 113 is firmly connected to the outer wall of the vacuum box 101 by a sealed electrical connector. The inner side is connected to the low-temperature servo motor 304 in the soft lock needle drive assembly 3 through a wire, and the outer side can be connected to other components, thereby realizing the transfer function of the control signal of the soft lock needle drive assembly 3.

[0050] The middle-layer mounting plate assembly 2 mainly includes a middle-layer mounting plate 201, a parameter setting line pressure plate 202, a parameter setting line 203, an umbrella opener host mounting slot 204, a cable pressure plate 206, a cutter signal test line 207, an umbrella opener handheld device mounting slot 208, a clamping mechanism 210, a handheld device pressure plate 211, a hinge 213 and a pressure pad 214, etc., which can realize the functions of installing and fixing the electronic automatic umbrella opener host 205, installing, positioning and tightening the electronic automatic umbrella opener handheld device 212, and locking the communication line. The middle-level mounting plate 201 has a runway-shaped hole below the parameter setting line pressure plate 202. The parameter setting line 203 connector can pass through this hole and is fixedly connected to the middle-level mounting plate 201 via the parameter setting line pressure plate 202 with a semicircular hole on the side. This effectively locks the parameter setting line 203 connector in place and prevents it from falling under the middle-level mounting plate 201. This allows the parameter setting line 203 to be removed without damaging or disassembling the parameter setting line 203 connector, facilitating maintenance. A large circular hole is left in the center of the middle-level mounting plate 201. The cutter signal test line 207 connector can pass through this hole and is fixedly connected to the middle-level mounting plate 201 via two cable pressure plates 206 with semicircular holes on the sides. This effectively locks the cutter signal test line 207 connector in place and prevents it from falling under the middle-level mounting plate 201. This allows the cutter signal test line 207 to be removed without damaging or disassembling the cutter signal test line 207 connector, facilitating maintenance. The parachute opener main unit mounting slot 204 is fixedly mounted on the middle mounting plate 201 and is used for mounting an electronic automatic parachute opener main unit 205 . The umbrella opener handset mounting slot 208 is fixedly mounted on the middle mounting plate 201 and is used to mount and position an electronic automatic umbrella opener handset 212; the handset pressure plate 211 is connected to the umbrella opener handset mounting slot 208 by a hinge and can be rotated 95 degrees to open and close; a pressure pad 214 is pasted under the pressure plate 211. When the pressure plate 211 is closed, the pressure plate 211 is pressed by the clamping mechanism 210, and the handset 212 is conveniently fastened without scratching the surface of the handset 212; the clamping mechanism 210 mainly includes a clamping mechanism mounting pillar 2101, a spring 2102, a locking mechanism pressure plate 2103, and a clamping sleeve 2104. The spring 2102 can be compressed by rotating the clamping sleeve 2104, thereby dynamically adjusting the distance between the locking mechanism pressure plate 2103 and the clamping mechanism mounting pillar 2101, thereby controlling the tightness of the locking mechanism pressure plate 2103 pressing the pressure plate 211.

[0051] The soft locking pin drive assembly 3 mainly includes a low-temperature module 301, a low-temperature servo motor 304, a limit switch 302, a dust cover 303, a soft locking pin bracket 305, a modified soft locking pin assembly 306, etc., which can drive the five modified soft locking pin assemblies 306 to perform plugging and unplugging actions, thereby realizing the automatic locking and unlocking functions of the five electronic automatic parachute openers. The modified soft locking needle assembly 306 is installed on the soft locking needle bracket 305, the soft locking needle bracket 305 and the dust cover 303 are installed on the low-temperature module slider, and the low-temperature servo motor 304 is installed on the low-temperature module 301, which converts the shaft rotation into slider movement, drives the soft locking needle bracket 305 and the dust cover 303 to move horizontally, and then drives the modified soft locking needle assembly 306 to move horizontally to realize the plugging and unplugging action; one side of the middle mounting plate 201 contains a rectangular hole, and the soft locking needle bracket 305 is fastened to the slider on the low-temperature module 301 through the rectangular hole, and through the dust cover 303 installed on the slider and the flexible accordion cover 105 installed on the soft locking needle bracket 305 and the middle mounting plate 201, the flexible accordion cover 105 contracts during the plugging and unplugging movement of the soft locking needle bracket 305 to ensure that the rectangular hole is always closed; the limit switch 302 can adjust the position to limit the limit stroke of the module slider. The modified soft locking pin bracket 305 contains a runway-shaped hole, and the modified soft locking pin assembly 306 passes through the runway-shaped hole. By adjusting the position of the modified soft locking pin, all the modified soft locking pins are aligned with the sockets of all installed handheld soft locking pins, and the modified soft locking pin assembly 306 is tightened so that the modified soft locking pin can be normally inserted and removed from the handheld soft locking pin socket, thereby realizing the simultaneous locking and unlocking actions of the five modified soft locking pin assemblies 306.

[0052] The atmospheric data measuring instrument is connected to the vacuum test chamber pressure control nozzle through the air pipe, which can realize parameterized regulation of the air pressure in the vacuum test chamber and display the simulated vacuum environment state in the vacuum test chamber with altitude and speed values;

[0053] The high and low temperature chamber is connected to the network cable interface on the front panel of the control cabinet through a network cable to realize temperature information interaction. The temperature, heating rate and other information of the high and low temperature chamber can be remotely set online through the dedicated software in the control cabinet; the vacuum test chamber equipped with the electronic automatic umbrella opener can be placed inside the high and low temperature chamber, and the performance of the electronic automatic umbrella opener can be continuously tested under three environmental conditions: normal temperature, high temperature and low temperature, thereby more accurately testing the performance of the electronic automatic umbrella opener under different environmental conditions.

[0054] On the other hand, Figure 9As shown, the present invention provides a comprehensive testing method for electronic automatic parachute openers, which is applied to the above-mentioned comprehensive testing system for electronic automatic parachute openers. The comprehensive testing system can meet the performance testing requirements of five electronic automatic parachute openers under normal temperature, high temperature, and low temperature environments. The testing methods under high and low temperatures are similar. The testing methods under normal temperature are slightly modified compared to those under high and low temperatures. The testing methods under high temperature environment are introduced below:

[0055] Step 1: Place the vacuum test chamber, control cabinet, atmospheric data measuring instrument, and high and low temperature chamber together and connect them through cables and air pipes to form an electronic automatic parachute opener comprehensive test system;

[0056] Step 2: Power on and preheat for 10 minutes, and then the atmospheric data measuring instrument will do a self-test.

[0057] Step 3: Install the electronic automatic parachute opener to be tested in the vacuum test chamber, close the cover tightly, and close the high and low temperature chamber doors;

[0058] Step 4: Set the performance parameters of the electronic automatic parachute opener, the parameters of the atmospheric data measuring instrument, and the temperature information of the high and low temperature chamber on the control cabinet;

[0059] Step 5: Control the soft lock pin to move and insert it into the electronic automatic parachute opener;

[0060] Step 6: Control the atmospheric data measuring instrument to apply pressure to the vacuum test chamber at a preset rate, thereby establishing a simulated high-altitude environment with a specified ascent speed and altitude in the vacuum test chamber;

[0061] Step 7: After reaching the preset height, control the soft lock pin to pull out, that is, apply the unlock control information;

[0062] Step 8: Control the air pressure in the vacuum chamber to decrease at a specified descent rate. When the specified height is reached, the electronic automatic parachute opener will be unlocked, that is, the cutter will release an electrical signal. At this time, the cutter signal test line 207 collects the cutter's electrical signal and transmits it to the control cabinet and records the corresponding time point information. During this process, the height and height descent speed information in the vacuum test chamber near the specified height point and the corresponding time information are recorded in real time;

[0063] Step 9: Find out the air pressure height value and descent speed value in the vacuum test chamber corresponding to the cutter electrical signal, determine whether they meet the requirements, and output the report.

[0064] Step 10: After the test is completed, the next test is performed in a loop.

[0065] Preferably, in step 1, the high and low temperature chamber can be used selectively. When conducting high and low temperature tests, the vacuum test chamber is placed inside the high and low temperature chamber, and then the lines and pipelines are connected, and the temperature inside the high and low temperature chamber is regulated by the control system; when conducting normal temperature tests, the vacuum test chamber can be placed outside the high and low temperature chamber without the need to connect and communicate with the high and low temperature chamber; the soft lock pin in the vacuum test chamber is initially in the pulled-out state.

[0066] Preferably, in step 3, the electronic automatic umbrella opener is connected to the parameter setting line and the cutter signal test line, and the flexible soft locking pin is slightly inserted into the soft locking pin hole of the electronic automatic umbrella opener handheld device.

[0067] Preferably, the step 5 can precisely control the speed and displacement of the soft locking needle insertion.

[0068] Preferably, in step 8, when the parachute opener is unlocked, the duration of the released electrical signal is very short, about 10ms. A dedicated circuit is used to capture this short signal and delay the signal for a period of time, so that the control cabinet can effectively capture the signal and record the corresponding time value. This short signal enters the dedicated circuit through the socket P1. The socket P1 is connected to the resistor R1. The other end of the resistor R1 is connected to the positive electrode of the photocoupler U1. The negative electrode of U1 is connected to another port of the socket P1. The emitter of U1 is connected to the ground. The collector of U1 is connected to one end of the resistor R2 and is also connected to the A1 end of the integrated circuit U2. The other end of the resistor R2 is connected to a 5V power supply. The CEXT2 end of U2 is connected to the capacitor C1. The other end of the capacitor C1 is connected in parallel with the REXT / CEXT2 end of U2 and then connected to the resistor R3. The other end of the resistor R3 is connected to the 5V power supply. The CLR1 end and the B1 end of U2 are both connected to the 5V power supply. The terminal is connected to the 1A terminal of the integrated circuit U3, the VCC terminal of U3 is connected to the 5V power supply, the GND terminal of U3 is connected to the ground, one end of the resistor R4 is connected to the 5V power supply, and the other end of the resistor R4 is connected in parallel with the 1Y terminal of U3 and then connected to the socket P2. The P2 terminal is the output signal terminal of the dedicated circuit.

[0069] Preferably, in step 9, at the moment when the cutter signal is captured, the five altitude values ​​and the five altitude descent speed values ​​recorded closest to the time point are found, and functional relationships between the five altitude values ​​and the five altitude descent speed values ​​and the time value are established respectively, and the altitude value and the altitude descent speed value corresponding to the moment when the cutter signal is captured are calculated; and a report is generated to automatically calculate the parachute opening height and speed error value.

[0070] The above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with this technical field within the scope disclosed in the present invention should be covered by the protection scope of the present invention.

Claims

1. An electronic automatic parachute opener comprehensive test system, characterized in that: It includes a control cabinet, a vacuum test chamber, an atmospheric data measuring instrument, and a high and low temperature chamber. The control cabinet is connected to the atmospheric data measuring instrument via a communication cable, the atmospheric data measuring instrument is connected to the vacuum test chamber via an air pipe, the control cabinet is connected to the vacuum test chamber via a communication cable, and the control cabinet is connected to the high and low temperature chamber via a communication cable. The vacuum test chamber is placed in the high and low temperature chamber. The vacuum test chamber is used to simulate the unlocking environment of the electronic automatic parachute opener. The vacuum test chamber includes a vacuum chamber, a middle-layer mounting plate assembly, and a soft-lock needle drive assembly; the middle-layer mounting plate assembly is horizontally installed in the middle of the vacuum chamber to divide the vacuum chamber into upper and lower spaces; the soft-lock needle drive assembly is installed in the lower space of the vacuum chamber, and a vacuum chamber cover is provided on the top of the vacuum chamber. The vacuum chamber cover is opened and closed 120 degrees by a cam structure on a rotating frame; a rectangular groove is provided on the upper surface of the vacuum chamber, and a vacuum sealing gasket is pasted on the lower surface of the vacuum chamber cover, which is matched with a dynamic shaft closing structure to ensure that the lower surface of the cover is in contact with the lower surface of the cover when the cover is closed. The upper surfaces of the vacuum box overlap, and the four flower-shaped handles are rotated 180 degrees and then tightened to allow the central protrusion of the vacuum sealing gasket to fit into the rectangular groove, achieving a tight fit between the cover and the vacuum box. The lower part of the vacuum box is separated by a partition. The enclosed space formed by the partition, the middle mounting plate assembly and the vacuum box is used to install the power device of the soft lock needle drive assembly, communication cables, control cables and fillers. The other part of the space formed by the partition and the vacuum box is connected to the upper space of the vacuum box and is used to accommodate the cables of the electronic automatic parachute opener. The middle-layer mounting plate assembly includes a middle-layer mounting plate, a parameter setting line pressure plate, a parameter setting line, an umbrella opener host mounting slot, a cable pressure plate, a cutter signal test line, an umbrella opener handheld device mounting slot, a clamping mechanism, a handheld device pressure plate, a hinge and a pressure pad; a runway-shaped hole is left on one side of the middle-layer mounting plate, and the parameter setting line connector can pass through the hole, and is fixedly connected to the middle-layer mounting plate through the parameter setting line pressure plate with a semicircular hole on the side, so that the parameter setting line connector can be effectively positioned; a large circular hole is left in the middle of the middle-layer mounting plate, and the cutter signal test line connector can pass through the hole The holes are fixedly connected to the middle-layer mounting plate through the cable pressing plates with semicircular holes on the two sides, so that the cutter signal test line connector is effectively positioned. The umbrella opener host mounting slot is fixedly mounted on the middle-layer mounting plate and is used to install the electronic automatic umbrella opener host; the umbrella opener handheld device mounting slot is fixedly mounted on the middle-layer mounting plate and is used to install and position the electronic automatic umbrella opener handheld device; the pressing plate is connected to the umbrella opener handheld device mounting slot through a hinge to achieve 95° rotation opening and closing; a pressure pad is pasted under the pressing plate, and when the pressing plate is closed, the pressing plate is pressed by the clamping mechanism.

2. The electronic automatic parachute opener comprehensive test system according to claim 1, characterized in that: The soft lock needle drive assembly includes a low-temperature module, a low-temperature servo motor, a limit switch, a dust cover, a soft lock needle bracket, and a modified soft lock needle assembly; the modified soft lock needle assembly is installed on the soft lock needle bracket, the soft lock needle bracket and the dust cover are installed on the low-temperature module slider, and the low-temperature servo motor is installed on the low-temperature module to convert the shaft rotation into slider movement, drive the soft lock needle bracket and the dust cover to move horizontally, and then drive the modified soft lock needle assembly to move horizontally to realize the plugging and unplugging action; one side of the middle mounting plate contains a rectangular hole, and the soft lock needle bracket passes through the rectangular hole and the low-temperature The slider on the module is tightly connected, and through the dust cover installed on the slider and the flexible accordion cover installed on the soft lock pin bracket and the middle mounting plate, the flexible accordion cover shrinks during the insertion and removal of the soft lock pin bracket to ensure that the rectangular hole is always closed; the modified soft lock pin bracket contains a runway-shaped hole, and the modified soft lock pin assembly passes through the runway-shaped hole. By adjusting the position of the modified soft lock pin, the modified soft lock pin is aligned with the soft lock pin socket of the handheld device, and the modified soft lock pin assembly is tightened, so that the modified soft lock pin can be normally inserted and removed from the soft lock pin socket of the handheld device to achieve locking and unlocking actions.

3. The electronic automatic parachute opener comprehensive testing system according to claim 1, characterized in that: The atmospheric data measuring instrument is connected to the pressure control nozzle of the vacuum test box through an air pipe.

4. The electronic automatic parachute opener comprehensive testing system according to claim 1, characterized in that: The vacuum test chamber equipped with an electronic automatic parachute opener can be placed inside a high and low temperature chamber to achieve continuous performance testing of the electronic automatic parachute opener under three environmental conditions: normal temperature, high temperature, and low temperature, thereby more accurately testing the performance of the electronic automatic parachute opener under different environmental conditions.

5. A testing method for the electronic automatic parachute opener comprehensive testing system according to any one of claims 1 to 4, characterized in that: Step 1: Place the vacuum test chamber, control cabinet, atmospheric data measuring instrument, and high and low temperature chamber together, and connect them via communication cables and air pipes to form a comprehensive test system for electronic automatic parachute openers. Step 2: Power on and preheat for 10 minutes, and then the atmospheric data measuring instrument will do a self-test. Step 3: Install the electronic automatic parachute opener to be tested in a vacuum test chamber, close the lid and seal it, and then place it in a high and low temperature chamber; Step 4: Set the performance parameters of the electronic automatic parachute opener, the parameters of the atmospheric data measuring instrument and the temperature information of the high and low temperature chamber through the control cabinet; Step 5: Control the soft lock pin to move and insert it into the electronic automatic parachute opener; Step 6: Control the atmospheric data measuring instrument to apply pressure to the vacuum test chamber at a preset rate, thereby establishing a simulated high-altitude environment with a specified ascent speed and altitude in the vacuum test chamber; Step 7: After reaching the preset height, control the soft lock pin to pull out, that is, apply the unlock control information; Step 8: Control the air pressure in the vacuum chamber to drop at a specified rate. When the specified height is reached, the electronic automatic parachute opener is unlocked and the cutter releases an electrical signal. At this time, the cutter signal test line collects the cutter's electrical signal. During this process, the height and descent speed information in the vacuum chamber near the specified height point, as well as the corresponding time information, are recorded in real time. Step 9: Find the corresponding air pressure height value and descent speed value in the vacuum test chamber when the cutter electrical signal is collected, determine whether it meets the requirements, and output a report; Step 10: After the test is completed, the next test is performed in a loop.

6. The testing method of the electronic automatic parachute opener comprehensive testing system according to claim 5, characterized in that: In step 8, when the parachute opener is unlocked, a dedicated circuit is used to capture a short signal and delay the signal for a period of time, so that the control cabinet can effectively capture the signal and record the corresponding time value; the cutter electrical signal is input into the dedicated circuit, the signal is isolated by the photoelectric coupler, and enters the positive electrode of the photoelectric coupler after current limiting by the resistor. The collector of the photoelectric coupler is indirectly connected to the 5V power supply through a pull-up resistor. When the cutter signal is input into the photoelectric coupler, the potential between the collector of the photoelectric coupler and the pull-up resistor is briefly pulled down from 5V to 0V and then restored to 5V. The signal is connected to the delay circuit, which is mainly composed of a monostable multivibrator and an external resistor. The delay circuit is composed of a capacitor, the input end of the delay circuit captures the falling edge of the level change, and its output end output changes from a low level of 0V to a high level of 5V. At the same time, the monostable multivibrator is triggered to charge the peripheral capacitor. When the input becomes a low level, the output end of the delay circuit discharges through the charged capacitor and resistor, thereby continuing the high level state of the output end. By selecting appropriate capacitors and resistors, the continuous output time of the high level can be determined; at the same time, connecting the output end of the delay circuit to a bipolar buffer can improve the load capacity of the dedicated circuit, and at the same time give the output end of the dedicated circuit a certain level signal, further improving the anti-interference ability of the circuit.

7. The test method of the electronic automatic parachute opener comprehensive test system according to claim 5, wherein: In step 9, at the moment when the cutter signal is captured, multiple altitude values ​​and multiple altitude descent speed values ​​recorded closest to the time point are found, and functional relationships between the multiple altitude values ​​and multiple altitude descent speed values ​​and the time value are established respectively, and the altitude value and altitude descent speed value corresponding to the moment when the cutter signal is captured are solved; and a report is generated to automatically calculate the parachute opening height and speed error value.

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