Ground debugging method of slope monitoring system in helicopter assembly process

Abstract

The application discloses a ground debugging method for a slope monitoring system in a helicopter assembly process, relates to the technical field of helicopter assembly, and comprises the following steps: two or three aviation levels are removed from a dashboard of a helicopter and are respectively installed on installation platforms of slope monitoring system checking devices; the slope monitoring system checking devices placed on the ground are leveled, an electronic angle gauge arranged on the slope monitoring system checking devices is used to read angle values, so that a debugging reference is established; and on the basis of the leveled slope monitoring system checking devices, the sockets on the helicopter are connected to the plug lead wires of the aviation levels through extension lead wires. The application realizes multi-angle attitude calibration of the slope monitoring system by constructing a controllable tilting debugging environment on the ground and introducing an electronic angle gauge as a unified reference, reduces flight risks, and simultaneously completes synchronous detection and multi-point checking of multiple aviation levels, guarantees measurement consistency, and improves overall stability of the system and assembly quality.

Description

Technical Field

[0001] This application relates to the field of helicopter assembly technology, specifically to a ground debugging method for a slope monitoring system during helicopter assembly. Background Technology

[0002] In the field of aviation, due to the high-altitude environment and lack of ground reference points, the human ability to judge attitude using vision and balance organs is essentially ineffective. Therefore, specialized instruments are necessary to monitor and judge flight attitude. Currently, helicopters are typically equipped with a slope monitoring system to achieve attitude monitoring and early warning functions. This system mainly consists of an airborne horizon instrument, a slope monitor, and signal indicators. The airborne horizon instrument, based on the fixed-axis characteristic of its internal gyroscope, can sense changes in the aircraft's attitude relative to the direction of Earth's gravity and output corresponding angle information. The slope monitor processes the horizon instrument signal, and when it detects that the aircraft's attitude reaches a preset threshold (such as 15° or 33°), it triggers an alarm signal and alerts the pilot to a dangerous attitude state via indicator lights on the instrument panel. This type of slope monitoring system plays a crucial role in ensuring helicopter flight safety, especially during takeoff, landing, and low-altitude flight, providing timely warnings of attitude anomalies, and is one of the key safety systems in existing aviation equipment.

[0003] However, under current technological conditions, the aforementioned slope monitoring system still has significant shortcomings during the assembly and commissioning phases. Particularly during ground commissioning, because the helicopter itself is stationary, it cannot realistically simulate multi-angle attitude changes during flight, resulting in a lack of effective verification methods for the calibration of the horizon instrument and the entire slope monitoring system. In actual assembly and test flights, there have been multiple instances where the set angle values ​​corresponding to slope alarm signals were inconsistent with the actual aircraft attitude, indicating that existing commissioning methods cannot guarantee the accuracy and consistency of the system output. Furthermore, due to the limited resolution of the horizon instrument's scale, it is difficult to meet the requirements of high-precision commissioning, further exacerbating the risk of error accumulation in the absence of high-precision reference measurement methods. These problems directly affect the reliability of the slope monitoring system, thus posing a potential threat to flight safety.

[0004] Therefore, there is an urgent need for a debugging method that can simulate different attitude angle changes of helicopters under ground conditions and achieve high-precision calibration, so as to make up for the shortcomings of existing technologies in debugging and verification capabilities.

[0005] The information disclosed in the background section is only intended to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0006] The purpose of this application is to provide a ground debugging method for a slope monitoring system during helicopter assembly, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this application provides the following technical solution: a ground debugging method for a slope monitoring system during helicopter assembly, characterized by comprising the following steps: Remove two or three aerial horizon instruments from the helicopter instrument panel and install them on the mounting platform of the slope monitoring system calibration equipment to ensure that each aerial horizon instrument is calibrated under the same calibration benchmark. The slope monitoring system calibration equipment placed on the ground is leveled, and the angle values ​​are read by the electronic angle meter set on the slope monitoring system calibration equipment to establish a calibration benchmark. Based on the calibration of the slope monitoring system, the extension wires are used to connect the corresponding sockets on the helicopter to the plugs of each aviation horizon instrument, the relevant power supply on the helicopter is turned on, and the slope selection switch on the instrument panel is set to the predetermined slope angle. Based on the completed electrical connection and parameter settings, rotate the rotary handle of the slope monitoring system calibration equipment to drive the worm gear and turbine transmission in the adjustment mechanism, thereby causing the installation platform to tilt to simulate the slope attitude change of a helicopter in the air. When the installation platform rotates to the predetermined slope angle, the alarm signal status on the instrument panel is detected, and the deflection angle of each aviation horizon instrument is read and compared with the measurement value of the electronic angle instrument to complete the accuracy calibration of the slope monitoring system.

[0008] The slope monitoring system calibration equipment includes a base, an adjustment mechanism, an installation platform, and an electronic angle meter. The base adopts a one-piece metal structure and is equipped with multi-point support legs. The legs have an adjustment mechanism for horizontal adjustment. At the same time, the bottom of the base is equipped with a shock-absorbing structure to reduce external vibration interference. The installation platform is installed above the adjustment mechanism and maintains a stable connection with the base, thereby ensuring structural stability and repeatability during the angle measurement process.

[0009] The adjustment mechanism includes a handle, a worm gear, a worm wheel, a fixed platform, and a moving platform. The handle and the worm gear transmit torque through a rigid connection. The worm gear and the worm wheel form a meshing transmission structure. The worm wheel is installed inside the fixed platform. The moving platform is connected to the worm wheel and achieves tilting motion around a predetermined axis through transmission. The worm gear transmission achieves the self-locking characteristic of angle adjustment, thereby ensuring that the position remains stable at any angle.

[0010] The installation platform is set up with multiple independent installation stations. Each installation station is processed based on the same plane reference. Each station is equipped with positioning holes and fixing structures for installing aerial horizon instruments, thereby ensuring that multiple aerial horizon instruments are under the same spatial reference conditions and avoiding the impact of installation errors on angle measurement results.

[0011] The electronic angle meter uses a tilt measurement device based on MEMS technology. Internally, it obtains the tilt angle by detecting the change in capacitance difference caused by the change in the gravitational component of the mass block. Combined with the signal acquisition circuit and algorithm compensation module, it outputs the angle value. By compensating for temperature drift and zero drift, it achieves a stable angle output, which serves as the angle measurement reference.

[0012] A support structure is set between the mobile platform and the fixed platform. The support structure adopts the form of rolling bearings or sliding pairs to reduce transmission friction resistance and improve the smoothness of tilting movement. The mobile platform adopts a reinforced structural design to support multiple aerial horizon instruments, thereby avoiding local deformation during angle adjustment.

[0013] The surface of the mounting platform is precision machined to ensure flatness within a predetermined range. Furthermore, the mounting platform and the mobile platform are connected by a fastening structure to ensure no relative displacement between them during angle changes, thus maintaining the consistency of the attitude of each aerial horizon instrument.

[0014] The slope monitoring system calibration equipment performs repeated calibration through multi-angle adjustment, covering multiple preset values, including small and large angle ranges. By establishing the error distribution relationship of the aerial horizon instrument through multi-point angle measurement data, a comprehensive evaluation of the measurement performance of each aerial horizon instrument can be achieved.

[0015] Each aerial horizon instrument is electrically connected to the power interface on the helicopter via an extension cable. The extension cable is shielded to reduce signal interference, thereby ensuring that the working status of the aerial horizon instrument is consistent with the actual installed status and improving the authenticity of the debugging results.

[0016] By comparing and analyzing the angle data output by each aerial horizon instrument with the measurement results of the electronic angle instrument, the deviation values ​​between each aerial horizon instrument are obtained. Through the deviation analysis results, consistency differences are identified, and the aerial horizon instruments with deviations are corrected, thereby improving the overall measurement consistency of the slope monitoring system.

[0017] The technical effects and advantages provided by this application in the above technical solution are as follows: This application establishes a controllable tilt calibration environment on the ground, enabling the slope monitoring system to complete multi-angle attitude calibration during the assembly phase. This avoids relying on the flight test phase for error exposure and improves the pre-calibration level. During calibration, an electronic angle meter is introduced as a unified angle reference, ensuring that the slope alarm trigger angle remains consistent with the actual attitude angle. This improves the accuracy of alarm signals, ensuring pilots receive reliable alerts during critical attitude changes and reducing safety risks caused by angle misjudgments.

[0018] This application enables simultaneous testing of multiple aerial horizon instruments under the same reference conditions during the commissioning process. By unifying the installation reference and angle measurement method, the output results of each testing unit are compared and analyzed, thereby ensuring the measurement consistency among the instruments. Repeated calibration under multi-point angle conditions can effectively identify the source of deviation and make targeted adjustments, making the overall output of the slope monitoring system more stable and reliable. At the same time, it improves the level of assembly quality control and enhances the system's adaptability and operational reliability during actual flight. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 This is a schematic diagram of the calibration equipment for the slope monitoring system of this application.

[0021] Figure 2 This is a schematic diagram of the organization to be adjusted in this application.

[0022] 1. Base; 2. Adjustment mechanism; 3. Mounting platform; 4. Electronic angle gauge; 5. Slope monitoring system calibration equipment; 11. Handle; 22. Fixed platform; 33. Moving platform. Detailed Implementation

[0023] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that the description of this disclosure will be more complete and fully convey the concept of the exemplary embodiments to those skilled in the art.

[0024] like Figure 1 and Figure 2 As shown, this application provides a ground debugging method for a slope monitoring system during helicopter assembly.

[0025] Implementation Method 1: In this implementation method, a ground debugging method for a slope monitoring system during helicopter assembly is carried out using a slope monitoring system calibration device 5. This calibration device 5 serves as the core debugging platform, used to construct controllable attitude change conditions in a ground environment, thereby replacing the helicopter's in-flight attitude change process and achieving calibration and verification of the slope monitoring system. The overall structure of the slope monitoring system calibration device 5 includes a base 1, an adjustment mechanism 2, a mounting platform 3, and an electronic angle meter 4. These components are rationally arranged according to their functions to ensure a stable, reliable, and highly accurate debugging process.

[0026] The base 1 serves as the supporting foundation for the entire slope monitoring system calibration equipment 5. It is preferably made of high-strength metal materials, such as aluminum alloy or steel structure materials, to improve overall rigidity and resistance to deformation. Anti-slip pads or adjustable feet can be installed under the base 1 to adapt to different ground conditions. Initial leveling can be achieved by adjusting the feet, thus providing a foundation for subsequent precision leveling. The upper surface of the base 1 has a mounting surface for fixing the adjustment mechanism 2, ensuring that the adjustment mechanism 2 does not experience relative displacement during operation, thereby ensuring the stability and repeatability of angle adjustment.

[0027] The adjustment mechanism 2 is positioned above the base 1 and serves as the key structure for achieving angle changes. The adjustment mechanism 2 mainly includes a handle 11, a fixed platform 22, and a moving platform 33. The fixed platform 22 is fixedly connected to the base 1, serving as a support component for the transmission structure. The moving platform 33 is positioned above the fixed platform 22 and is connected to the handle 11 via a worm gear transmission structure. The handle 11 is fixedly connected to the worm. When the operator rotates the handle 11, the worm rotates synchronously, engaging with a worm gear inside the fixed platform 22 to drive the moving platform 33 to tilt around a specific axis. This worm gear structure has a self-locking characteristic; when the applied external force stops, the moving platform 33 can stably maintain its current angle position, preventing rotation or wobbling, thus ensuring angle stability during adjustment.

[0028] The movable platform 33 is located on top of the adjustment mechanism 2, and the mounting platform 3 is installed above it. The movable platform 33 can be continuously adjusted within a certain angle range under the action of a worm gear transmission, preferably designed to be adjustable within ±45° to cover the common range of helicopter attitude changes. Bearings or sliding support structures can be installed between the movable platform 33 and the fixed platform 22 to reduce rotational resistance and improve the smoothness of adjustment. Meanwhile, angle scale markings can be installed on the side or bottom of the movable platform 33 to help roughly determine the current tilt angle.

[0029] Mounting platform 3 is positioned above mobile platform 33, serving as the mounting carrier for the aerial horizon instrument. Mounting platform 3 preferably employs a planar structure design and is secured to mobile platform 33 using bolts or clips to ensure robust installation. Multiple mounting positions can be provided on mounting platform 3 to simultaneously secure two or three aerial horizon instruments. All mounting positions maintain a unified reference plane to ensure that multiple aerial horizon instruments can be calibrated under the same reference conditions, thereby achieving consistent calibration. Positioning holes or limiting structures can be provided on the surface of mounting platform 3 to prevent positional shifts of the aerial horizon instruments during calibration.

[0030] An electronic angle gauge 4 is installed on one side or the upper surface of the mounting platform 3 to measure the tilt angle of the mounting platform 3 in real time. The electronic angle gauge 4 employs an angle measurement device based on MEMS technology. When the mounting platform 3 tilts, the component of the detection mass block inside the electronic angle gauge 4 changes in the direction of gravity, causing a change in capacitance difference or resonant frequency. The internal circuit acquires this signal, converts it through analog conversion, and compensates for it with algorithms before outputting the angle value. The electronic angle gauge 4 has a high resolution, for example, reaching an accuracy of 1″, which can meet the ±1.5° adjustment accuracy requirement of the slope monitoring system. The output of the electronic angle gauge 4 can be directly read through a display screen, allowing operators to easily monitor the current angle status in real time.

[0031] During the commissioning process, firstly, two or three aerial horizon indicators are removed from the helicopter instrument panel and installed in their respective mounting positions on mounting platform 3. They are then secured with screws or clamps to ensure stable installation. Next, each aerial horizon indicator is electrically connected to its socket on the helicopter via extension cables, ensuring it operates under the same power supply conditions as in actual operation. After the electrical connection is complete, the helicopter's power supply is turned on, putting the aerial horizon indicators into operational status.

[0032] After completing the equipment connection, the slope monitoring system calibration device 5 is calibrated. By adjusting the support feet of the base 1 or adjusting its position, the electronic angle meter 4 is made to display a zero-degree state, thereby establishing a unified calibration benchmark. This calibration process has a significant impact on the accuracy of subsequent calibrations; therefore, it is necessary to ensure that the reading of the electronic angle meter 4 is stable and the error is within the allowable range.

[0033] After leveling is completed, the slope selection switch on the helicopter instrument panel is set to a predetermined angle, such as 15° or 33°. Then, the operator slowly rotates handle 11, driving the moving platform 33 to tilt via a worm gear transmission structure, thereby causing the mounting platform 3 and the aviation horizon instrument mounted on it to change angle synchronously. During rotation, the rotation speed and angle are controlled by observing the readings of the electronic angle gauge 4, gradually bringing the mounting platform 3 closer to the target angle value.

[0034] When the electronic angle gauge 4 displays a value of 15° or 33°, stop rotating the handle 11. At this time, the moving platform 33 remains stable under the self-locking action of the worm gear. The operator observes the status of the warning indicator lights on the helicopter instrument panel to determine whether they have been triggered normally at the set angle. At the same time, the operator reads the deflection angle of each aerial horizon instrument and compares it with the value displayed by the electronic angle gauge 4. If there is a deviation between the aerial horizon instrument readings and the electronic angle gauge 4, the deviation value is recorded, and adjustments or calibrations are made as needed.

[0035] Through the above steps, the slope changes of a helicopter under different attitudes in the air can be simulated under ground conditions, enabling dynamic debugging and accuracy calibration of the slope monitoring system. This method not only verifies the accuracy of the slope alarm signal triggering but also performs consistency comparisons of multiple aerial horizon instruments, thereby improving the reliability of the entire slope monitoring system. Furthermore, the high-precision measurement capabilities of the electronic angle gauge 4 effectively compensate for the insufficient resolution of the aerial horizon instrument scale, reducing human reading errors and improving the reliability of the debugging results.

[0036] In practical applications, the slope monitoring system can be calibrated at multiple points by repeatedly adjusting different angles, such as 10°, 20°, and 30°, thereby further improving the overall system performance. Through these methods, critical debugging work can be completed without relying on flight conditions, significantly reducing flight test risks and improving quality control during the assembly phase.

[0037] Implementation Method Two: In this implementation method, a ground-based calibration method for a slope monitoring system during helicopter assembly aims to improve calibration accuracy. This is achieved through structural optimization of the slope monitoring system calibration device 5, improvement of measurement accuracy, and refinement of the error control mechanism, thus enabling high-precision calibration of the slope monitoring system. The slope monitoring system calibration device 5 includes a base 1, an adjustment mechanism 2, a mounting platform 3, and an electronic angle meter 4. Each structure in this implementation method is optimized to meet the requirements of high-precision calibration.

[0038] The base 1 serves as the fundamental support structure for the entire slope monitoring system calibration equipment 5, and in this embodiment, it employs a highly stable structural design. The base 1 is preferably made of high-rigidity materials, such as thick-walled steel plates or an integral cast structure, to reduce minor deformations caused by external disturbances during commissioning. The bottom of the base 1 can be equipped with a multi-point support structure, including three or four adjustable legs, allowing for initial leveling of the base 1 by adjusting the height of the legs. Each leg can be fitted with a rubber shock-absorbing pad or composite damping material to absorb ground vibrations or impacts generated during operation, thereby reducing the impact of vibration on measurement accuracy. Simultaneously, a counterweight structure can be installed inside the base 1 to increase overall inertia by adding mass, further enhancing equipment stability and preventing swaying during adjustment.

[0039] The adjustment mechanism 2, mounted above the base 1, is the core component for achieving precise angle adjustment. In this embodiment, the adjustment mechanism 2 employs a high-precision worm gear transmission structure, where the handle 11 and the worm are rigidly connected via a key or fastening structure, ensuring that the rotation of the handle 11 is transmitted to the worm without backlash. The worm meshes with a high-precision turbine housed inside the fixed platform 22. The turbine is manufactured using precision machining processes, and its tooth profile is trimmed to reduce meshing backlash and transmission errors. The fixed platform 22 is fixedly mounted on the base 1, and its internal structure supports the worm gear transmission assembly while ensuring the stability of the transmission shaft.

[0040] The movable platform 33 is positioned above the fixed platform 22 and connected to a worm gear via a worm wheel drive. Driven by the handle 11, the movable platform 33 can smoothly tilt around a predetermined axis of rotation. A rolling bearing or high-precision sliding pair is installed between the movable platform 33 and the fixed platform 22 to reduce frictional resistance and improve smoothness of movement. The structural design of the movable platform 33 prioritizes rigidity and uniform force distribution. Its upper surface, serving as the support surface for the mounting platform 3, must ensure that no local deformation occurs at different tilt angles, thereby avoiding affecting the accuracy of angle measurement.

[0041] Mounting platform 3 is fixed above moving platform 33 for mounting aerial horizon instruments. In this embodiment, mounting platform 3 adopts a high flatness design, and its surface is precision-machined to control the flatness error within a small range, ensuring the consistency of attitude of each aerial horizon instrument after installation. Mounting platform 3 is provided with multiple mounting holes or positioning slots for fixing two or three aerial horizon instruments. Each mounting position is based on the same reference plane, ensuring that multiple aerial horizon instruments can be adjusted under the same angular reference. Mounting platform 3 and moving platform 33 are fixed together by bolts or an integrated structure to avoid relative displacement during adjustment.

[0042] The electronic angle gauge 4 is installed at the upper left corner of the mounting platform 3, serving as a high-precision angle measurement reference in this embodiment. Built using MEMS technology, the electronic angle gauge 4 incorporates micromechanical structures to sense changes in the direction of gravity. When the mounting platform 3 tilts, the component of the detection mass block within the electronic angle gauge 4 changes in the direction of gravity, causing changes in capacitance difference or resonant frequency. The electronic angle gauge 4 integrates a signal processing circuit to acquire the detected signal, digitize it via an analog-to-digital converter, and then compensate for errors such as temperature drift and zero-point drift using algorithms, ultimately outputting a stable and highly accurate angle value. The resolution of the electronic angle gauge 4 reaches the 1″ level, far exceeding the 5° scale resolution of an aerial horizon instrument, thus providing a reliable reference for high-precision calibration.

[0043] During the commissioning preparation phase, the aerial horizon instrument is removed from the helicopter's instrument panel and installed in its respective mounting positions on the mounting platform 3, secured with screws or clamps to ensure a firm installation. Subsequently, the aerial horizon instrument is connected to the helicopter's onboard socket via an extension cable, and the helicopter's power supply is turned on, putting the aerial horizon instrument into normal working condition. After completing the electrical connection, the slope monitoring system calibration device 5 is calibrated. By adjusting the feet of the base 1 or fine-tuning its position, the electronic angle gauge 4 is made to display a zero-degree reading, thus establishing a unified commissioning benchmark.

[0044] During the debugging process, the adjustment mechanism 2 is precisely operated via handle 11. Each rotation of handle 11 results in a small angle, which, through the worm gear reduction transmission, causes a minute angular change in the moving platform 33, thus achieving fine angle adjustment. The operator observes the real-time readings of the electronic angle gauge 4 to gradually adjust the mounting platform 3 to the target angle, such as 15° or 33°. Because the worm gear structure has a high transmission ratio, it can achieve a small output change corresponding to a small input angle, thus enabling high-resolution angle adjustment.

[0045] Once the electronic angle gauge 4 displays that the target angle has been reached, the handle 11 is stopped from being rotated. At this point, the moving platform 33 maintains a stable position under the action of the transmission structure. The operator reads the indicated angle of the aerial horizon instrument and compares it with the measured value of the electronic angle gauge 4. If there is a deviation in the aerial horizon instrument reading, the deviation data is recorded and adjustments are made as needed. By repeatedly adjusting at different angle points, such as 10°, 20°, and 25°, an error curve for the aerial horizon instrument can be established, thereby achieving more accurate calibration.

[0046] In this embodiment, achieving high precision relies not only on the measurement capabilities of the electronic angle meter 4, but also on the stability of the overall structure and the precision control of the transmission system. Through the vibration-damping design of the base 1, the precision transmission structure of the adjustment mechanism 2, the high flatness of the mounting platform 3, and the high-resolution measurement capabilities of the electronic angle meter 4, a complete high-precision calibration system is formed, thereby meeting the ±1.5° calibration accuracy requirement of the slope monitoring system.

[0047] Furthermore, in practical applications, measurement accuracy can be further improved through ambient temperature control. For example, debugging can be performed in a constant temperature environment to reduce the impact of temperature changes on the electronic angle meter 4. Simultaneously, zero-point calibration can be performed on the electronic angle meter 4 before use to eliminate deviations caused by long-term use. These measures can further improve the stability and reliability of the debugging results.

[0048] This implementation method enables high-precision debugging of the slope monitoring system in a ground environment, effectively solving the problem of insufficient accuracy in traditional methods, significantly improving the accuracy of slope alarm threshold settings, and thus reducing the safety risks caused by attitude misjudgment during flight.

[0049] Implementation Method 3: In this implementation method, a ground debugging method for a slope monitoring system during helicopter assembly revolves around the consistency debugging of multiple aerial horizon instruments. By constructing a multi-station unified reference structure on the slope monitoring system calibration device 5, synchronous calibration and error comparison of multiple aerial horizon instruments under the same attitude conditions are achieved, thereby improving the overall measurement consistency and reliability of the slope monitoring system. The slope monitoring system calibration device 5 includes a base 1, an adjustment mechanism 2, a mounting platform 3, and an electronic angle meter 4. These structures work together to complete the consistency debugging process of multiple instruments.

[0050] The base 1, serving as the overall support structure, is crucial in this embodiment for ensuring the stability of the equipment when multiple instruments are operating simultaneously. The base 1 is constructed from high-rigidity materials, such as thick plate steel or a welded structure, to enhance its resistance to deformation. The base 1 has multiple support legs at its bottom, each equipped with a fine-tuning mechanism for precise adjustment of the equipment's level. During multi-instrument commissioning, due to the multiple instrument loads on the mounting platform 3, the base 1 needs high load-bearing capacity and anti-overturning ability. Therefore, reinforcing ribs or counterweights can be installed inside the base 1 to improve overall stability and lower the center of gravity, thereby reducing minor swaying during angle adjustments.

[0051] The adjustment mechanism 2, located between the base 1 and the mounting platform 3, is the core component for achieving unified attitude adjustment. The adjustment mechanism 2 includes a handle 11, a fixed platform 22, and a moving platform 33. The fixed platform 22 is fixedly connected to the base 1, serving as the transmission support foundation. The handle 11 is connected to a worm gear, which is supported by bearings within the internal structure of the fixed platform 22 to ensure smooth rotation. The worm gear precisely meshes with a turbine inside the fixed platform 22. As the handle 11 rotates, the worm gear drives the turbine to rotate, thereby causing the moving platform 33 to tilt around a fixed axis. The moving platform 33 is designed to maintain structural rigidity even when supporting multiple aerial horizon instruments; therefore, it preferably employs an integrally machined structure or a reinforced plate structure to avoid localized deformation under uneven stress.

[0052] Mounting platform 3, fixed above mobile platform 33, serves as the mounting carrier for multiple aerial horizon instruments. In this embodiment, mounting platform 3 adopts a multi-station layout design, with multiple mounting positions set on its upper surface. Each mounting position is machined based on the same geometric reference plane, thereby ensuring planar consistency between the mounting positions. The surface of mounting platform 3 undergoes precision grinding, and its flatness is controlled within a high precision range, thus avoiding measurement errors caused by inconsistent mounting surfaces. Each mounting position is equipped with an independent fixing structure, such as screw holes, slots, or clamping mechanisms, to fix the aerial horizon instrument, ensuring that no positional shift or loosening occurs during debugging.

[0053] The electronic angle gauge 4 is installed in a fixed position on the mounting platform 3, such as the upper left corner, to provide a unified angle reference. During multi-instrument consistency debugging, the electronic angle gauge 4 not only performs angle measurement but also serves as a reference standard for all airborne horizon instruments. Built using MEMS technology, the electronic angle gauge 4 obtains the tilt angle by detecting changes in the mass block's position under gravity, and performs data calculation and compensation through an internal signal processing unit to output a high-precision angle value. The accuracy of the electronic angle gauge 4 is preferably at the 1″ level, far exceeding the scale resolution of airborne horizon instruments, providing a reliable basis for consistency comparison.

[0054] During the commissioning preparation phase, two or three aerial horizon indicators are removed from the helicopter instrument panel and installed at multiple stations on the mounting platform 3. Each aerial horizon indicator is installed using an independent fixing structure, ensuring that their installation orientation is consistent to avoid errors caused by differences in installation orientation. Subsequently, each aerial horizon indicator is connected to the helicopter's power interface via extension cables, ensuring that each aerial horizon indicator is under power supply conditions consistent with actual operating conditions. After completing the electrical connection, the slope monitoring system calibration device 5 is calibrated by adjusting the feet of the base 1 to make the electronic angle gauge 4 display zero degrees, thereby establishing a unified angle reference benchmark.

[0055] After leveling is completed, the multi-instrument consistency debugging process begins. The operator slowly rotates the adjustment mechanism 2 via handle 11, driving the moving platform 33 to tilt, thereby causing the mounting platform 3 and all its aerial horizon instruments to change angle synchronously. During angle adjustment, the readings of the electronic angle meter 4 are observed to control the mounting platform 3 to gradually reach the preset angle, such as 15° or 33°. Once the target angle is reached, the rotation of handle 11 is stopped, and the moving platform 33 maintains a stable position under the action of the worm gear transmission structure.

[0056] Under stable conditions, the deflection angles of each aerial horizon instrument are simultaneously read and the corresponding data are recorded. By comparing the readings of each aerial horizon instrument with the measurements of the electronic angle meter 4, the error value of each aerial horizon instrument relative to the reference angle can be obtained. Furthermore, by analyzing the differences in readings between different aerial horizon instruments, the consistency between multiple instruments can be determined. For example, if there are significant differences in the readings of the aerial horizon instruments under the same angular conditions, it indicates a consistency deviation, requiring further calibration.

[0057] After completing the measurement at one angle point, the mounting platform 3 can be adjusted to other angles, such as 10°, 20°, 25°, etc., using handle 11, and the above measurement process can be repeated under multiple angle conditions. Through multi-point data acquisition, error distribution curves for each aerial horizon instrument can be established, and their consistency trends can be analyzed. Based on this, aerial horizon instruments with larger deviations can be individually adjusted or corrected, thereby improving overall consistency.

[0058] During the consistency debugging process, data recording methods, such as manual recording or electronic acquisition, can be introduced to collect and analyze the readings of each aerial horizon instrument at different angles. Statistical methods can be used to calculate the maximum deviation, average deviation, and standard deviation between each instrument, thereby quantifying the level of consistency. Instruments exceeding the allowable error range can be recalibrated or replaced, ensuring that the overall performance of the slope monitoring system meets design requirements.

[0059] The aforementioned multi-instrument consistency calibration method enables the synchronous calibration and consistency verification of multiple airborne horizon instruments under ground conditions, effectively avoiding misjudgments caused by differences between instruments during actual flight. This method achieves systematic calibration of multiple detection units through a unified angle reference, synchronous adjustment, and multi-point measurement, thereby improving the overall reliability of the slope monitoring system. Furthermore, this method can complete the calibration work without relying on flight conditions, reducing risks during flight testing and improving assembly and calibration efficiency.

[0060] In practical applications, the structure of the installation platform 3 can be further optimized, for example, by adding more workstations to accommodate different models of instruments, or by setting adjustable mounting bases to fit equipment of different sizes. Simultaneously, the electronic angle meter 4 can be periodically calibrated to ensure the accuracy of benchmark measurements. Through the aforementioned extended design, the slope monitoring system calibration device 5 can have wider applicability and higher debugging capabilities, thus playing a crucial role in the helicopter assembly process.

[0061] The foregoing has only described certain exemplary embodiments of this application by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of this application. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of this application.

Claims

1. A ground debugging method for a slope monitoring system during helicopter assembly, characterized in that, Includes the following steps: Remove two or three aerial horizon instruments from the helicopter instrument panel and install them on the mounting platform of the slope monitoring system calibration equipment. The slope monitoring system calibration equipment placed on the ground is leveled, and the angle values ​​are read by the electronic angle meter set on the slope monitoring system calibration equipment to establish a calibration benchmark. Based on the calibration of the slope monitoring system, the extension wires are used to connect the corresponding sockets on the helicopter to the plugs of each aviation horizon instrument, the relevant power supply on the helicopter is turned on, and the slope selection switch on the instrument panel is set to the predetermined slope angle. Based on the completed electrical connection and parameter settings, rotate the rotary handle of the slope monitoring system calibration equipment to drive the worm gear and turbine transmission in the adjustment mechanism, thereby causing the installation platform to tilt to simulate the slope attitude change of a helicopter in the air. When the installation platform rotates to the predetermined slope angle, the alarm signal status on the instrument panel is detected, and the deflection angle of each aviation horizon instrument is read and compared with the measurement value of the electronic angle instrument to complete the accuracy calibration of the slope monitoring system.

2. The ground debugging method for a slope monitoring system during helicopter assembly according to claim 1, characterized in that, The slope monitoring system calibration equipment includes a base, adjustment mechanism, installation platform and electronic angle meter. The base adopts an integral metal structure and is equipped with multi-point support legs. The legs have an adjustment structure, and the bottom of the base is equipped with a shock-absorbing structure.

3. The ground debugging method for a slope monitoring system during helicopter assembly according to claim 2, characterized in that, The adjustment mechanism includes a handle, a worm gear, a worm wheel, a fixed platform, and a moving platform. The handle and the worm gear transmit torque through a rigid connection. The worm gear and the worm wheel form a meshing transmission structure. The worm wheel is installed inside the fixed platform. The moving platform is connected to the worm wheel and achieves tilting motion around a predetermined axis through transmission. The angle adjustment self-locking characteristic is achieved through worm gear transmission.

4. The ground debugging method for a slope monitoring system during helicopter assembly according to claim 2, characterized in that, The installation platform is set up with multiple independent installation stations. Each installation station is processed based on the same plane reference. Each station is equipped with positioning holes and fixing structures for installing aerial horizon instruments, ensuring that multiple aerial horizon instruments are under the same spatial reference conditions.

5. The ground debugging method for a slope monitoring system during helicopter assembly according to claim 2, characterized in that, The electronic angle meter uses a tilt measurement device based on MEMS technology. Internally, it obtains the tilt angle by detecting the change in capacitance difference caused by the change in the gravitational component of the mass block. Combined with the signal acquisition circuit and algorithm compensation module, it outputs the angle value. The angle output is achieved by compensating for temperature drift and zero drift, thus serving as the angle measurement reference.

6. The ground debugging method for a slope monitoring system during helicopter assembly according to claim 3, characterized in that, A support structure is set between the mobile platform and the fixed platform. The support structure adopts the form of rolling bearings or sliding pairs. The mobile platform adopts a reinforced structural design to support multiple aerial horizon instruments.

7. The ground debugging method for a slope monitoring system during helicopter assembly according to claim 2, characterized in that, The surface of the installation platform is precision machined to ensure flatness within a predetermined range, and the installation platform and the moving platform are connected by a fastening structure to ensure no relative displacement between them during angle changes.

8. The ground debugging method for a slope monitoring system during helicopter assembly according to claim 2, characterized in that, The slope monitoring system calibration equipment performs repeated calibration through multi-angle adjustment, covering multiple preset values, including small and large angle ranges. By establishing the error distribution relationship of the aerial horizon instrument through multi-point angle measurement data, a comprehensive evaluation of the measurement performance of each aerial horizon instrument can be achieved.

9. The ground debugging method for a slope monitoring system during helicopter assembly according to claim 1, characterized in that, Each aerial horizon instrument is electrically connected to the power interface on the helicopter via an extension cable. The extension cable is shielded to reduce signal interference, thereby ensuring that the working status of the aerial horizon instrument is consistent with the actual installed status.

10. A ground debugging method for a slope monitoring system during helicopter assembly according to claim 2, characterized in that, By comparing and analyzing the angle data output by each aerial horizon instrument with the measurement results of the electronic angle instrument, the deviation values ​​between each aerial horizon instrument are obtained. The consistency differences are identified through the deviation analysis results, and the aerial horizon instruments with deviations are corrected.

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