Automatic Control Detection and Installation Device for Aircraft Fuel System Signalers and Its Usage Method

Abstract

The present invention belongs to the field of automatic control detection of aircraft fuel system signalers, and particularly relates to an automatic control detection installation device and a usage method for aircraft fuel system signalers. The present invention realizes the test requirements for automatic control detection of signalers at all installation positions of the aircraft fuel tank, and can quickly and effectively conduct pre-installation tests and post-installation troubleshooting of fuel system signalers. Since the device wall panel is made of acrylic material and the adopted oil level measurement standard sensor has visibility and judgment ability, it is convenient to observe and judge the working process of all signalers, so as to avoid the blind area that cannot be accurately judged by ordinary devices. Using this device for detection can automatically control and detect the fuel system signalers at all installation positions and working states in the closed area of the fuel tank. Ensure the consistency of fuel system signaler products in pre-installation and post-installation tests. This device has good installation processability, simple operation, strong versatility, high service life, and reduces the manufacturing cost of parts.

Description

Technical Field

[0001] The present invention belongs to the field of automatic control detection of aircraft fuel system signalers, and particularly relates to an automatic control detection installation device and a usage method for aircraft fuel system signalers. Background Art

[0002] A variety of models of fuel system signalers are installed at different positions in each fuel tank of the aircraft, which are used to convert the height of different fuel levels in the aircraft fuel tank into on-off signals to achieve the automatic control function of the fuel system. The installation positions of the fuel system signalers in the fuel tank are divided into the lower part, the middle part, and the upper part, which can meet the accurate measurement of the fuel level in the fuel tank under various flight attitudes of the aircraft. The installation quality of the fuel system signalers in the closed area of the fuel tank is very important. For the automatic control detection of the fuel system signalers that simulate all installation positions and working states in the closed area of the aircraft fuel tank to meet the accurate and fast requirements in production detection. In view of the frequent failures of the fuel system signalers in the closed area of the aircraft fuel tank in recent years, to solve the problem of the lack of automatic control detection technology for fuel system signalers in production, so as to improve the automatic control detection technology of fuel system signalers installed at different positions in each fuel tank of the aircraft, ensure the smooth progress of the debugging test in the closed area of the on-board fuel tank, reduce the drawbacks that affect the production progress such as repeated removal and installation of the fuel tank and troubleshooting and repair due to the self-failure problems of the fuel system signaler finished products after installation, save the aircraft debugging cycle, and ensure the installation quality of the on-board finished products.

[0003] Regarding the capacity building for the pre-installation detection of fuel system signalers at different installation positions in the closed area of the aircraft fuel tank and solving the problem of difficult troubleshooting in the closed area of the fuel tank after installation, through the analysis and simulation of the working principle, installation position, and test process of the fuel system signalers in the closed area of the fuel tank, planning the test principle and the research task of the detection device, using the method based on the simulated fuel tank to achieve the automatic control detection of the fuel system signalers at all installation positions in the closed area of the fuel tank, and using the automatic control detection test device of the fuel system signaler in the simulated fuel tank to achieve the effect of automatic control detection of all models of fuel system signalers in the closed area of the fuel tank, and realizing the function of automatic control detection of all models of fuel system signalers in the simulated closed area of the fuel tank. Summary of the Invention

[0004] The present invention aims to solve the technical problems existing in the existing test technology or related technologies, and fill the technical gap in the automatic control detection of fuel system signalers at each installation position of the aircraft fuel tank.

[0005] The present invention is used for the automatic control detection of fuel system signalers that simulate all installation positions and working states in the closed area of the aircraft fuel tank, so as to improve the automatic control detection technology of fuel system signalers installed in the aircraft fuel tank and achieve the purpose of accurate detection.

[0006] The technical solution of the present invention is as follows:

[0007] An automatic control detection and installation device for an aircraft fuel system signaler. The installation positions of the fuel system signaler in the fuel tank are divided into the lower part, the middle part, and the upper part, which can meet the accurate measurement of the fuel level in the fuel tank under various flight postures of the aircraft.

[0008] The automatic control detection and installation device for the fuel system signaler includes a lower installation unit of the simulated fuel tank, a middle installation unit of the simulated fuel tank, and an upper installation unit of the simulated fuel tank.

[0009] The lower installation unit of the simulated fuel tank includes a bottom plate with an oil inlet, an anti-impact cap, a left side plate, a rear plate, a right side plate, cross-recessed countersunk head screws, a lower front plate, a lower signaler mounting plate, a steel sleeve, a sealing washer, a lower signaler mounting plug, and a compression assembly.

[0010] The size of the oil inlet of the bottom plate with an oil inlet meets the size requirements of the oil inlet pipe connecting to the automatic control detection oil rack tabletop, and it is the inlet / outlet for adding / discharging oil during automatic control detection. The anti-impact cap is fixed to the oil inlet of the bottom plate with an oil inlet by cross-recessed countersunk head screws respectively, which is used to prevent the bad control of the refueling impact caused by unstable refueling. The left side plate, the rear plate, the right side plate, and the lower front plate are fixed around the bottom plate with an oil inlet by cross-recessed countersunk head screws to form the lower housing of the device. The lower signaler mounting plate is fixed to the lower front plate by a steel sleeve, a sealing washer, and cross-recessed countersunk head screws, which is used for the mounting port position of the fuel system signaler whose installation position is at the lower part of the fuel tank. The lower signaler mounting plug is used to seal the mounting port when the fuel system signaler to be measured is not installed, which is used for dust prevention of the lower installation unit of the simulated fuel tank.

[0011] The middle installation unit of the simulated fuel tank includes a middle signaler mounting and fixing seat, an O-ring, countersunk head screws, a sealing washer, a positioning pin, a right side plate, and a middle signaler mounting plug.

[0012] The middle signaler mounting and fixing seat is fixed to the right side plate by a positioning pin, an O-ring, countersunk head screws, and a sealing washer. Its size meets the size requirements of the fuel system signaler whose installation position is in the middle of the fuel tank, which is used for the installation and fixation of the fuel system signaler whose installation position is in the middle of the fuel tank. The middle signaler mounting plug is used to seal the mounting port when the fuel system signaler to be measured is not installed, which is used for dust prevention of the middle installation unit of the simulated fuel tank.

[0013] The upper installation unit of the simulated fuel tank includes a left side plate, a rear plate, a right side plate, cross-recessed countersunk head screws, cross-recessed pan head screws, a dust cover, a handle, an upper front plate, a support bar, a mark transmission fixing bracket, an upper signaler mounting plate, a magnetostrictive level sensor, a fuel tank fixing block, and hexagon bolts.

[0014] The left plate, rear plate, right plate, and upper front plate are fixed with cross-recessed countersunk head screws to form the housing of the simulation fuel tank upper installation unit device and are connected and fixed to the housing of the simulation fuel tank upper installation unit device. The dust cover covers the simulation fuel tank upper installation unit device, and its size needs to be larger than the housing of the simulation fuel tank upper installation unit device to meet the requirement of directly covering the simulation fuel tank device, playing the role of preventing fuel volatilization and splashing outside and dust prevention in the simulation fuel tank device. The handle is fixed on the dust cover with cross-recessed pan head screws for convenient picking up and placing of the dust cover. The calibration and transmission fixing bracket is fixed on the support bar with cross-recessed countersunk head screws for fixing the magnetostrictive liquid level sensor, and its size meets the installation requirements of the magnetostrictive liquid level sensor. The magnetostrictive liquid level sensor is used for the sensing and detection functions of the automatic control end signal. The upper signaler mounting plate is fixed on the support bar with cross-recessed countersunk head screws, and its size meets the size requirements of the fuel system signaler at the upper part of the fuel tank for the mounting opening position of the fuel system signaler at the upper part of the fuel tank. The fuel tank fixing block is fixed on the rear plate with hexagon bolts for the installation and fixation of the simulation fuel tank device.

[0015] The usage method of the automatic control detection installation device for the aircraft fuel system signaler includes the following steps:

[0016] The first step is measurement. According to the overall size, installation position, and signal point position of the fuel system signaler to be measured, calculate the upper and lower ranges L1 of the trigger signal, and then select a magnetostrictive liquid level sensor that meets the requirements according to L1, that is, the oil level measurement standard sensor, and require the effective range L2 of the oil level measurement standard sensor to be ≥ mm. Then, calculate the overall height H of the simulation fuel tank according to L2 and the upper and lower dead zones L3 of the oil level measurement standard sensor, and require H ≥ mm. To meet the installation requirements of fuel system signalers at different installation positions, the simulation fuel tank detection and installation device for the automatic control detection of fuel system signalers needs to be designed as a special-shaped box body. On the premise of facilitating the installation of the fuel system signaler to be measured and the oil level measurement standard sensor, calculate the overall size of the simulation fuel tank detection and installation device to meet the test installation requirements of the automatic control detection of fuel system signalers and confirm the rationality of the test device design.

[0017] The second step is processing. According to the size requirements of the test installation simulation fuel tank for the automatic control detection of fuel system signalers, select transparent acrylic plates with a thickness of d to process each component of the installation simulation fuel tank, and process the installation opening hole positions of the signalers at the middle installation position on the right plate, the installation opening hole positions of the signalers at the lower installation position on the lower signaler mounting plate, the fuel inlet hole positions on the bottom plate with a fuel inlet, the installation opening hole positions of the signalers at the upper installation position on the upper signaler mounting plate, and the corresponding plugs to play the role of dust prevention in a 1:1 ratio.

[0018] Step 3: Assembly. The bottom plate with an oil inlet, left side plate, rear plate, right side plate, lower front plate, lower signaler mounting plate, upper front plate, and support bars are all made of acrylic board material. Before assembling the device, all components need to be cleaned. Clean the contact surfaces of the bottom plate with an oil inlet, left side plate, rear plate, right side plate, lower front plate, lower signaler mounting plate, upper front plate, and support bars. The inner wall of the device can be wiped with white silk cloth or a wet cotton ball, gently rubbing until no dirt is visible on the white silk cloth or wet cotton ball. All components to be transferred into the device and the signaler to be measured need to be wiped clean. Fasten with screws to ensure that the standard scale line is at the same height as the center line of the fuel system signaler. Bond the bottom plate with an oil inlet, left side plate, rear plate, right side plate, lower front plate, lower signaler mounting plate, upper front plate, and support bars firmly with acrylic glue, and no leakage is allowed at the contact surface joints. Assemble the remaining components to ensure no leakage at the interfaces. After the device is assembled, a dust plug needs to be covered when not in use to keep its interior clean and free of dirt.

[0019] Step 4: Installation. Align the oil inlet of the bottom plate with an oil inlet of the device with the oil inlet pipe on the automatic control test oil rack tabletop, and then apply appropriate downward pressure to make the oil inlet of the device fit completely with the oil inlet pipe to form a sealed state. Then fix the device on the metal bracket of the automatic control test oil rack tabletop with bolts.

[0020] Step 5: Use. Install the signaler of the fuel system to be measured on the corresponding mounting hole positions on the device according to its lower, middle, and upper mounting positions respectively, and then connect the magnetostrictive liquid level sensor and the signaler of the fuel system to be measured to the automatic control end. During installation, the signaler at the upper mounting position is installed through the upper mounting unit of the simulation fuel tank. Using the weight of the signaler itself, no fixation is required during detection. The signaler at the middle mounting position is installed through the mounting hole position of the middle mounting unit of the simulation fuel tank, installed from the inside of the fuel tank outward, positioned using the positioning holes and bolts, and the sealing performance of this hole position is ensured through O-ring seals, bolts, and sealing gaskets. The signaler at the lower mounting position is installed from bottom to top through the mounting hole position of the lower mounting unit of the simulation fuel tank of the device, and the sealing performance of this hole position is ensured through O-ring seals, bolts, and sealing gaskets.

[0021] This device can meet the installation requirements for the automatic control and detection of the signaler of the aircraft fuel system. It can achieve the capacity building for pre-installation testing of signalers at all installation positions in the enclosed area of the aircraft fuel tank and solve the problem of difficult troubleshooting in the enclosed area of the fuel tank after installation.

[0022] Advantages of the present invention:

[0023] The present invention has been verified through tests. The device design is applicable to the test installation of automatic control detection of fuel system signalers at all installation positions and working states of aircraft fuel tanks. According to the usage method of this device, the test requirements for automatic control detection of signalers at all installation positions of aircraft fuel tanks can be achieved, and the pre-installation test and post-installation troubleshooting of fuel system signalers can be carried out quickly and effectively. Since the device wall panel uses acrylic material and the adopted oil level measurement standard sensor has visibility and judgment ability, the working process of all signalers can be conveniently observed and judged to avoid the blind area that cannot be accurately judged by ordinary devices. Using this device for detection can automatically control and detect the fuel system signalers at all installation positions and working states in the fuel tank closed area. Ensure the consistency of fuel system signaler products in pre-installation and post-installation tests. This device has good installation processability, simple operation, strong versatility, high service life, reduces the manufacturing cost of parts, improves the ability of automatic control detection of fuel system signalers at all installation positions and working states in the aircraft fuel tank closed area, and achieves the purpose of accurate detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Front view of the device of the present invention;

[0025] Figure 2 Left view of the device of the present invention;

[0026] Figure 3 Right view of the device of the present invention;

[0027] Figure 4 Front sectional view of the device of the present invention.

[0028] In the figure: 1 bottom plate with an oil inlet, 2 impact-proof cap, 3 left side plate, 4 rear plate, 5 right side plate, 6 middle signaler installation and fixing seat, 7 O-ring, 8 countersunk head screw, 9 cross recessed countersunk head screw, 10 cross recessed pan head screw, 11 dust cover, 12 handle, 13 sealing washer, 14 positioning pin, 15 lower front plate, 16 lower signaler installation plate, 17 steel sleeve, 18 sealing washer, 19 upper front plate, 20 support bar, 21 standard transmission fixing bracket, 22 upper signaler installation plate, 23 middle signaler installation plug, 24 magnetostrictive liquid level sensor, 25 lower signaler installation plug, 26 compression assembly, 27 fuel tank fixing block, 28 hexagon bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] Embodiment 1:

[0030] The automatic control detection installation device for aircraft fuel system signalers. The installation positions of the fuel system signalers in the fuel tank are divided into lower, middle, and upper parts, which can meet the accurate measurement of the fuel tank oil level in various flight postures of the aircraft.

[0031] The automatic control detection and installation device of the fuel system signaler includes a lower mounting unit of the simulation fuel tank, a middle mounting unit of the simulation fuel tank, and an upper mounting unit of the simulation fuel tank.

[0032] The lower mounting unit of the simulation fuel tank includes a bottom plate 1 with an oil inlet, an impact-proof cap 2, a left side plate 3, a rear plate 4, a right side plate 5, a cross-slot countersunk head screw 9, a lower front plate 15, a lower signaler mounting plate 16, a steel sleeve 17, a sealing washer 18, a lower signaler mounting plug 25, and a compression assembly 26.

[0033] The size of the oil inlet of the bottom plate 1 with an oil inlet meets the size requirements of the oil inlet pipe connecting to the tabletop of the automatic control detection oil rack, and it is the inlet / outlet for adding / discharging oil during automatic control detection. The impact-proof cap 2 is fixed on the oil inlet of the bottom plate 1 with an oil inlet by cross-slot countersunk head screws 9 respectively, which is used to prevent the poor control of the refueling impact caused by unstable refueling. The left side plate 3, the rear plate 4, the right side plate 5, and the lower front plate 15 are fixed around the bottom plate 1 with an oil inlet by cross-slot countersunk head screws 9 to form the lower housing of the device. The lower signaler mounting plate 16 is fixed on the lower front plate 15 by a steel sleeve 17, a sealing washer 18, and cross-slot countersunk head screws 9, which is used for the mounting port position of the fuel system signaler located at the lower part of the fuel tank. The lower signaler mounting plug 25 is used to seal the mounting port and simulate the dust prevention of the lower mounting unit of the simulation fuel tank, and the compression assembly 26 is fixed on the lower signaler mounting plug 25.

[0034] The middle mounting unit of the simulation fuel tank includes a middle signaler mounting and fixing seat 6, an O-ring 7, a countersunk head screw 8, a sealing washer 13, a positioning pin 14, a right side plate 5, and a middle signaler mounting plug 23.

[0035] The middle signaler mounting and fixing seat 6 is fixed on the right side plate 5 by a positioning pin 14, an O-ring 7, a countersunk head screw 8, and a sealing washer 13. Its size meets the size requirements of the fuel system signaler located in the middle of the fuel tank and is used for the installation and fixation of the fuel system signaler located in the middle of the fuel tank. The middle signaler mounting plug 23 is used to seal the mounting port when the fuel system signaler to be measured is not installed, and it is used to simulate the dust prevention of the middle mounting unit of the simulation fuel tank.

[0036] The upper mounting unit of the simulation fuel tank includes a left side plate 3, a rear plate 4, a right side plate 5, a cross-slot countersunk head screw 9, a cross-slot pan head screw 10, a dust-proof cover 11, a handle 12, an upper front plate 19, a support bar 20, a label transmission fixing bracket 21, an upper signaler mounting plate 22, a magnetostrictive level sensor 24, a fuel tank fixing block 27, and a hexagon bolt 28.

[0037] The left side plate 3, rear plate 4, right side plate 5, and upper front plate 19 are fixed with cross-recessed countersunk head screws 9 to form the housing of the upper mounting unit device of the simulated fuel tank, and are connected and fixed to the housing of the upper mounting unit device of the simulated fuel tank. The dust cover 11 covers the upper part of the upper mounting unit device of the simulated fuel tank, and its size needs to be larger than the housing of the upper mounting unit device of the simulated fuel tank to meet the requirement of directly covering the simulated fuel tank device, so as to prevent the fuel in the simulated fuel tank device from volatilizing and splashing out and play a role in dust prevention. The handle 12 is fixed on the dust cover 11 with cross-recessed pan head screws 10 for conveniently picking up and placing the dust cover 11. The marker transmission fixing bracket 21 is fixed on the support bar 20 with cross-recessed countersunk head screws 9 for fixing the magnetostrictive liquid level sensor 24, and its size meets the installation requirements of the magnetostrictive liquid level sensor 24. The magnetostrictive liquid level sensor 24 is used for the sensing and detection functions of the automatic control end signal. The upper signaler mounting plate 22 is fixed on the support bar 20 with cross-recessed countersunk head screws 9, and its size meets the size requirements of the fuel system signaler at the upper part of the fuel tank for the installation position, and is used for the installation opening position of the fuel system signaler at the upper part of the fuel tank. The fuel tank fixing block 27 is fixed on the rear plate 4 with hexagon bolts 28 for the installation and fixation of the simulated fuel tank device.

[0038] Embodiment 2:

[0039] The usage method of the automatic control detection installation device for the aircraft fuel system signaler includes the following steps:

[0040] The first step is measurement. According to the overall dimensions, installation position, and signal point position of the fuel system signaler to be measured, calculate the upper and lower ranges L1 of the trigger signal, and then select a magnetostrictive liquid level sensor that meets the requirements according to L1, that is, the oil level measurement standard sensor, and require that the effective range L2 of the oil level measurement standard sensor ≥ L1 + 50 mm. Then, calculate the overall height H of the simulated fuel tank according to L2 and the upper and lower dead zones L3 of the oil level measurement standard sensor, and require that H ≥ L2 + L3 + 50 mm. To meet the installation requirements of fuel system signalers at different installation positions, the simulated fuel tank detection installation device for the automatic control detection of fuel system signalers needs to be designed as a special-shaped box body. On the premise of facilitating the installation of the fuel system signaler to be measured and the oil level measurement standard sensor, calculate the overall dimensions of the simulated fuel tank detection installation device to meet the test installation requirements of the automatic control detection of fuel system signalers and confirm the rationality of the test device design.

[0041] Step 2: Processing. According to the size requirements of the test installation simulation fuel tank automatically controlled by the fuel system signaler, select transparent acrylic plates with a thickness of d to process each component of the installation simulation fuel tank, and process the mounting hole positions for the signalers at the middle mounting position on the right side plate 5, the mounting hole positions for the signalers at the lower mounting position on the lower signaler mounting plate 16, the fuel inlet hole positions on the bottom plate 1 with a fuel inlet, the mounting hole positions for the signalers at the upper mounting position on the upper signaler mounting plate 22, as well as the corresponding plugs to play a role in dust prevention.

[0042] Step 3: Assembly. The bottom plate 1 with a fuel inlet, the left side plate 3, the rear plate 4, the right side plate 5, the lower front plate 15, the lower signaler mounting plate 16, the upper front plate 19, and the support bar 20 are all made of acrylic plate material. Before assembling the device, all components need to be cleaned. Clean the contact surfaces of the bottom plate 1 with a fuel inlet, the left side plate 3, the rear plate 4, the right side plate 5, the lower front plate 15, the lower signaler mounting plate 16, the upper front plate 19, and the support bar 20. The inner wall of the device can be wiped with white silk cloth or a wet cotton ball, gently rubbing until there is no dirt visible on the white silk cloth or wet cotton ball. All components and the signaler to be tested that are to be transferred into the device need to be wiped clean. Fasten with screws to ensure that the standard scale line is at the same height as the center line of the fuel system signaler. Bond the bottom plate 1 with a fuel inlet, the left side plate 3, the rear plate 4, the right side plate 5, the lower front plate 15, the lower signaler mounting plate 16, the upper front plate 19, and the support bar 20 firmly with acrylic glue, and no leakage is allowed at the contact surface joints. Assemble the remaining components to ensure no leakage at the interfaces. After the device is assembled, a dust-proof plug needs to be covered when not in use to keep its interior clean and free of dirt.

[0043] Step 4: Installation. Align the fuel inlet of the bottom plate 1 with a fuel inlet of the device with the fuel inlet pipe on the automatic control test oil rack table, and then apply appropriate pressure downward to make the fuel inlet of the device fit completely with the fuel inlet pipe to form a sealed state. Then fix the device on the metal bracket of the automatic control test oil rack table with bolts.

[0044] Step 5: Use. Install the fuel system signaler under test on the corresponding mounting ports of the device according to its lower, middle, and upper mounting positions, and then connect the magnetostrictive liquid level sensor 24 and the fuel system signaler under test to the automatic control terminal. During installation, the signaler at the upper mounting position is installed through the upper mounting unit of the simulated fuel tank. Using the self-weight of the signaler, no fixation is required during testing. The signaler at the middle mounting position is installed through the mounting port of the middle mounting unit of the simulated fuel tank, installed from the inside of the fuel tank outward, positioned using the positioning holes and bolts, and the sealing of this hole position is ensured by the O-ring, bolts, and sealing gasket. The signaler at the lower mounting position is installed from bottom to top through the mounting hole of the lower mounting unit of the simulated fuel tank of the device, and the sealing of this hole position is ensured by the O-ring, bolts, and sealing gasket.

[0045] This device can meet the installation requirements for the automatic control and detection of the fuel system signaler of the aircraft. It can realize the capacity building for pre-installation testing of signalers at all mounting positions in the closed area of the aircraft fuel tank and solve the problem of difficult troubleshooting in the closed area of the fuel tank after installation.

Claims

1. Aircraft fuel system signaler automatic control detection and installation device, characterized in that, The automatic control detection and installation device of the fuel system signaler includes a lower installation unit of the simulation fuel tank, a middle installation unit of the simulation fuel tank, and an upper installation unit of the simulation fuel tank; The lower installation unit of the simulation fuel tank includes a bottom plate (1) with an oil inlet, an impact-proof cap (2), a left side plate (3), a rear plate (4), a right side plate (5), a lower front plate (15), a lower signaler installation plate (16), a steel sleeve (17), a sealing gasket (18), a lower signaler installation plug (25), and a compression assembly (26); The bottom plate (1) with an oil inlet is the inlet / outlet for adding / discharging oil during automatic control detection; the impact-proof cap (2) is respectively fixed on the oil inlet of the bottom plate (1) with an oil inlet, and the left side plate (3), rear plate (4), right side plate (5), and lower front plate (15) are fixed around the bottom plate (1) with an oil inlet to form the lower housing of the device; the lower signaler installation plate (16) is fixed on the lower front plate (15) with a steel sleeve (17) and a sealing gasket (18) for the installation opening position of the fuel system signaler located at the lower part of the fuel tank; the lower signaler installation plug (25) is used to seal the installation opening and for dust prevention of the lower installation unit of the simulation fuel tank, and the compression assembly (26) is fixed on the lower signaler installation plug (25); The middle installation unit of the simulation fuel tank includes a middle signaler installation and fixing seat (6), an O-ring (7), a countersunk head screw (8), a sealing gasket (13), a positioning pin (14), a right side plate (5), and a middle signaler installation plug (23); The middle signaler installation and fixing seat (6) is fixed on the right side plate (5) with a positioning pin (14), an O-ring (7), a countersunk head screw (8), and a sealing gasket (13) for the installation and fixing of the fuel system signaler located at the middle part of the fuel tank; the middle signaler installation plug (23) is used to seal the installation opening when the fuel system signaler to be tested is not installed and for dust prevention of the middle installation unit of the simulation fuel tank; The upper installation unit of the simulation fuel tank includes a left side plate (3), a rear plate (4), a right side plate (5), a dust cover (11), a handle (12), an upper front plate (19), a support bar (20), a transmitter fixing bracket (21), an upper signaler installation plate (22), a magnetostrictive level sensor (24), and a fuel tank fixing block (27); The left side plate (3), rear plate (4), right side plate (5), and upper front plate (19) are fixed with cross recessed countersunk head screws (9) to form the housing of the upper mounting unit device of the simulated fuel tank and are connected and fixed to the housing of the upper mounting unit device of the simulated fuel tank; the dust cover (11) covers the upper part of the upper mounting unit device of the simulated fuel tank, and its size needs to be larger than the housing of the upper mounting unit device of the simulated fuel tank; the handle (12) is fixed on the dust cover (11) for conveniently picking up and placing the dust cover (11); the marking and transmission fixing bracket (21) is fixed on the support bar (20) for fixing the magnetostrictive liquid level sensor (24), and its size meets the installation requirements of the magnetostrictive liquid level sensor (24); the magnetostrictive liquid level sensor (24) is used for the sensing and detection functions of the automatic control end signal; the upper signaler mounting plate (22) is fixed on the support bar (20), and its size meets the size requirements of the fuel system signaler at the upper part of the fuel tank for the installation opening position of the fuel system signaler at the upper part of the fuel tank; the fuel tank fixing block (27) is fixed on the rear plate (4) with hexagon bolts (28) for the installation and fixation of the simulated fuel tank device.

2. The automatic control detection and installation device for the aircraft fuel system signaler according to claim 1, characterized in that, The anti-impact cap (2) is fixed on the oil inlet of the bottom plate (1) with an oil inlet with cross recessed countersunk head screws (9) to prevent the poor control of the refueling impact caused by unstable refueling.

3. The automatic control detection and installation device for the aircraft fuel system signaler according to claim 1 or 2, characterized in that, The handle (12) is fixed on the dust cover (11) with cross recessed pan head screws (10) for conveniently picking up and placing the dust cover (11); the marking and transmission fixing bracket (21) is fixed on the support bar (20) with cross recessed countersunk head screws (9).

4. The automatic control detection and installation device for the aircraft fuel system signaler according to claim 1 or 2, characterized in that The upper signaler mounting plate (22) is fixed on the support bar (20) with cross recessed countersunk head screws (9).

5. The aircraft fuel system signaler automatic control detection and installation device according to claim 3, characterized in that, The upper signaler mounting plate (22) is fixed on the support bar (20) with cross recessed countersunk head screws (9).

6. The usage method of the automatic control detection and installation device for the aircraft fuel system signaler according to any one of claims 1 to 5, characterized in that, It includes the following steps: The first step is measurement; according to the overall dimensions, installation position, and signal point position of the measured fuel system signaler, calculate the upper and lower ranges L1 of the trigger signal, and then select a magnetostrictive liquid level sensor that meets the requirements according to L1, that is, the oil level measurement standard sensor, and require that the effective range L2 of the oil level measurement standard sensor ≥ (L1 + 50) mm. Then, calculate the overall height H of the simulated fuel tank according to L2 and the upper and lower dead zones L3 of the oil level measurement standard sensor, and require that H ≥ (L2 + L3 + 50) mm; to meet the installation requirements of fuel system signalers at different installation positions, the simulated fuel tank detection and installation device for automatic control detection of the fuel system signaler needs to be designed as a special-shaped box body. On the premise of facilitating the installation of the measured fuel system signaler and the oil level measurement standard sensor, calculate the overall dimensions of the simulated fuel tank detection and installation device; to meet the test installation needs of the automatic control detection of the fuel system signaler, confirm the rationality of the test device design. Step 2: Processing; According to the size requirements of the test installation of the simulated fuel tank automatically controlled by the fuel system signaler, select a transparent acrylic board with a thickness of d to process each component of the simulated fuel tank, and process the mounting hole positions of the signalers at the middle mounting position on the right side plate (5), the mounting hole positions of the signalers at the lower mounting position on the lower signaler mounting plate (16), the fuel inlet hole positions on the bottom plate (1) with a fuel inlet, the mounting hole positions of the signalers at the upper mounting position on the upper signaler mounting plate (22), and the corresponding plugs to play a role in dust prevention; Step 3: Assembly; Assemble the bottom plate (1) with a fuel inlet, the left side plate (3), the rear plate (4), the right side plate (5), the lower front plate (15), the lower signaler mounting plate (16), the upper front plate (19), and the support strip (20). Clean the contact surfaces of the bottom plate (1) with a fuel inlet, the left side plate (3), the rear plate (4), the right side plate (5), the lower front plate (15), the lower signaler mounting plate (16), the upper front plate (19), and the support strip (20). The inner wall of the device can be wiped with white silk cloth or a wet cotton ball, gently rubbing until no dirt is visible on the white silk cloth or wet cotton ball; all parts and the signaler to be tested that are to be transferred into the device need to be wiped clean; fasten with screws to ensure that the standard scale line is at the same height as the center line of the fuel system signaler; bond the bottom plate (1) with a fuel inlet, the left side plate (3), the rear plate (4), the right side plate (5), the lower front plate (15), the lower signaler mounting plate (16), the upper front plate (19), and the support strip (20) firmly with acrylic glue, and no leakage is allowed at the contact surface joints; assemble the remaining parts to ensure no leakage at the interfaces; after the device is assembled, a dust-proof plug needs to be covered when not in use to keep its interior clean and free of dirt; Step 4: Installation; Align the fuel inlet of the bottom plate (1) with a fuel inlet of the device with the fuel inlet pipe on the automatic control test oil rack table, and then apply appropriate pressure downward to make the fuel inlet of the device fit completely with the fuel inlet pipe to form a sealed state; then fix the device on the metal bracket of the automatic control test oil rack table with bolts; Step 5: Use; Install the signaler of the fuel system to be tested at the corresponding mounting hole positions on the device according to its lower, middle, and upper mounting positions respectively, and then connect the magnetostrictive liquid level sensor (24) and the signaler of the fuel system to be tested to the automatic control end; during installation, the signaler at the upper mounting position is installed through the upper mounting unit of the simulated fuel tank, and using the weight of the signaler itself, no fixing is required during testing; the signaler at the middle mounting position is installed through the mounting hole position of the middle mounting unit of the simulated fuel tank, installed from the inside of the fuel tank outward, positioned using the positioning holes and bolts, and the sealing performance of this hole position is ensured through an O-ring, bolts, and a sealing gasket; the signaler at the lower mounting position is installed from bottom to top through the mounting hole position of the lower mounting unit of the simulated fuel tank of the device, and the sealing performance of this hole position is ensured through an O-ring, bolts, and a sealing gasket.

7. The usage method of the automatic control detection and installation device for the aircraft fuel system signaler according to claim 6, characterized in that, The bottom plate (1) with an oil inlet, left side plate (3), rear plate (4), right side plate (5), lower front plate (15), lower signaler mounting plate (16), upper front plate (19), and support bar (20) are all made of acrylic sheet material.

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