Pedal stroke and loading force measuring device and method

Abstract

The invention discloses a pedal stroke and loading force measuring device and method, and belongs to the field of aeronautical manufacturing engineering / aircraft assembly, and the pedal stroke and loading force measuring device comprises a fixed end part, a main body, a handheld terminal and a displacement measuring wire harness. The fixed end comprises a fixed sucker, a fixed base, a transverse measurement rotating shaft and a longitudinal measurement rotating shaft. The main body comprises a displacement sensor, a pressure sensor, a mounting plane, a pedal plane, a pedal fixing surface, high-density sponge and fixing nails. And the fixed end is connected with the displacement sensor of the main body through a displacement measurement wire harness. The main body is connected with the handheld terminal through a data wire harness; and the fixed end is not physically connected with the handheld terminal. According to the invention, the difficulty in measuring the pedal stroke and the loading force of the control system can be reduced, the error of a measurement result caused by the reading error of an operator is avoided, and the problem that the parameters of a pedal mechanism after a seat is mounted in a cabin are difficult to measure is also solved; the two physical quantities of force and displacement can be measured synchronously, the operation process is simplified, the operation difficulty is reduced, and the measurement efficiency and precision are improved.

Description

Technical Field

[0001] The present invention belongs to the field of aviation manufacturing engineering / aircraft assembly, and relates to a foot pedal stroke and load force measuring device and a measuring method. It is a device for confirming the foot pedal stroke amount and load force in the aircraft assembly and debugging process. It is used to digitally measure the stroke and load force of the foot pedal mechanism of the control system after the installation of the control system, without being restricted by the space after the seat is installed, and meets the use requirements of a single operator for measurement in the aircraft cockpit. Background Art

[0002] The control system is an important part of aircraft flight control and is highly related to flight safety. In the control system, the foot pedal mechanism is an institution composed of a parallel four-bar linkage, which is used to control the deflection of the aircraft rudder, the turning of the front landing gear wheels and other actions. During the assembly and debugging of a manned aircraft, it is necessary to measure and calibrate the load force and displacement of the foot pedal of the control system. However, the space in the aircraft cockpit is narrow, the installation position of the foot pedal mechanism is forward, and the longitudinal space is extremely limited. After the seat is installed, it is even more difficult to measure with a steel ruler and a push-pull force gauge.

[0003] Therefore, in order to effectively solve the problems of low measurement accuracy of the displacement and load force of the foot pedal mechanism of the control system and great measurement difficulty restricted by the narrow space of the cockpit, this invention is studied to achieve the purpose of synchronous measurement of two physical quantities of force and displacement, changing the measurement result from manual reading to digital display, simplifying the operation process, reducing the operation difficulty, and improving the measurement efficiency and accuracy. Summary of the Invention

[0004] In view of the problems and requirements existing in the prior art, according to the installation characteristics of the foot pedal mechanism of the on-board control system, measurement requirements and the actual situation such as the operation space in the aircraft cockpit, the present invention designs and manufactures a set of foot pedal stroke and load force measuring device to meet the high-precision and digital measurement of the stroke and load force of the foot pedal mechanism before and after the seat is installed in the cockpit, which is convenient for an operator to quickly complete the measurement of the two physical quantities. At the same time, the measurement results can be digitally displayed and recorded.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] A foot pedal stroke and load force measuring device, the composition of the measuring device is as Figure 1 、 Figure 2 shown, mainly including a fixed suction cup 1, a fixed base 2, a transverse measurement rotating shaft 3, a longitudinal measurement rotating shaft 4, a displacement measurement wire harness 5, a displacement sensor 6, a pressure sensor 7, an installation plane 8, a foot pedal plane 9, a foot pedal fixing surface 10, a handheld terminal housing 11, a data wire harness 12, a high-density sponge 13, a fixing nail 14, a display screen 15, a switch 16, an operation button 17, a multi-functional interface 18, and a solving unit 19.

[0007] According to the functional partition, the pedal stroke and load force measuring device is divided into three major parts: a fixed end, a main body, and a handheld terminal. Among them, the fixed end is composed of a fixed suction cup 1, a fixed base 2, a transverse measurement rotating shaft 3, and a longitudinal measurement rotating shaft 4; the main body is composed of a displacement sensor 6, a pressure sensor 7, a mounting plane 8, a foot pedal plane 9, a pedal fixing surface 10, a high-density sponge 13, and a fixing nail 14; the handheld terminal is composed of a handheld terminal housing 11, a display screen 15, a switch 16, operation buttons 17, a multi-functional interface 18, and a solving unit 19. The fixed end and the main body are connected by a displacement measurement wire harness 5; the main body and the handheld terminal are connected by a data wire harness 12; there is no physical connection between the fixed end and the handheld terminal. Specifically:

[0008] The fixed end part: The fixed suction cup 1 is a rubber part, which is used to adsorb the fixed end on any plane, and the other end is connected to the fixed base 2, and the two together form a measurement reference for adsorption on the plane. The transverse measurement rotating shaft 3 and the longitudinal measurement rotating shaft 4 are installed on the fixed base 2; the transverse measurement rotating shaft 3 can rotate axially within the range of ±90°, and collect the transverse rotation angle, and the graduation value is 1°. Similarly, the longitudinal measurement rotating shaft 4 can rotate axially within the range of ±90°, and collect the longitudinal rotation angle, and the graduation value is 1°.

[0009] The main body part: The displacement measurement wire harness 5 connects the fixed end to the displacement sensor 6. The foot pedal plane 9 is installed on the mounting plane 8. The displacement sensor 6 and the pressure sensor 7 are installed on the foot pedal plane 9. The displacement sensor 6 is used to measure and collect the real displacement amount when the pedal mechanism moves, and the pressure sensor 7 is used to collect the load force applied by the operator to the pedal mechanism, and integrates the data collection and data transmission functions of the displacement sensor.

[0010] Furthermore, the sides of the displacement sensor 6 and the pressure sensor 7 facing the pedal mechanism are glued to one side of the mounting plane 8, and the foot pedal plane 9 is installed on the mounting plane 8 through the fixing nail 14. The other side of the mounting plane 8 is connected to the pedal fixing surface 10 through the high-density sponge 13, and the pedal fixing surface 10 is used to fit with the on-board pedal.

[0011] The handheld terminal part: The solving unit 19 is installed in the handheld terminal housing 11 and is connected to the main body through the data wire harness 12, and is used to collect the measurement parameters output by the main body. The display screen 15 embedded in the handheld terminal housing 11 is used to display the measurement results and guide the operator to operate, and the switch 16 is used to control the power on and off of the whole set of devices. During use, the operator controls each option in the display screen through the operation buttons 17 according to the measurement requirements to realize operations such as result reading and difference calculation. After the measurement is completed, the measurement data is exported to the industrial control computer through the multi-functional interface 18 to realize the digital archiving of the measurement data.

[0012] A method for using a foot pedal stroke and load force measuring device, comprising the following steps:

[0013] Step 1: Fix the main body part of the foot pedal stroke and load force measuring device (hereinafter referred to as the device) on the foot pedal of the control system to ensure that the foot pedal fixing surface 10 is completely fitted with the foot pedal of the control system without relative movement. At this time, the fixing suction cup 1 and the handheld terminal part can be placed arbitrarily.

[0014] Step 2: The operator stabilizes the main body part of the device with the foot, pulls out the displacement measurement wire harness 5, and at the same time, fixes the fixing suction cup 1 to any suitable position on the cockpit floor. During the operation, the air in the fixing suction cup 1 needs to be evacuated. To ensure the displacement measurement accuracy of the foot pedal of the control system, when the fixing suction cup 1 is fixed, the axial direction of the transverse measurement rotating shaft 3 of the device is kept consistent with the heading of the aircraft to be measured.

[0015] Step 3: After the main body part of the device and the fixing suction cup 1 are firmly fixed, start the handheld terminal and enter the measurement interface.

[0016] Step 4: Enter the displacement measurement interface, and zero the load force before measurement; select the measurement direction as longitudinal, calculate the longitudinal displacement when the foot pedal of the control system is in the initial position state at this time, and record it.

[0017] Step 5: The operator slowly and evenly pedals the main body part fixed on the foot pedal of the control system in the cockpit, the force application point is on the foot pedal plane 9, stops the foot pedal stroke at the limit position, calculates the longitudinal displacement when the foot pedal of the control system is at the limit position at this time, and records it.

[0018] Step 6: The operator slowly stops applying force, and the foot pedal mechanism slowly returns to the middle position. At this time, the on-aircraft measurement is completed.

[0019] Step 7: Through the screen prompt and operation buttons of the handheld terminal, calculate the difference between the two measured displacement amounts, and the result is the foot pedal stroke of the control system.

[0020] The beneficial effects of the present invention are:

[0021] The present invention can reduce the difficulty of measuring the foot pedal stroke and load force of the control system, improve the measurement accuracy, avoid the error of the measurement result caused by the reading error of the operator, and also solve the problem that it is difficult to measure the parameters of the foot pedal mechanism after installing the seat in the cockpit. The present invention not only saves the measurement cycle, but also improves the professional technical level and optimizes the test process, bringing higher economic and social benefits to scientific research and production. Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram (isometric view) of the present invention.

[0023] Figure 2 Structural diagrams (isometric view) of different angles of the present invention and Figure 1 are shown.

[0024] Figure 3 The front view of the present invention;

[0025] Figure 4 The side view of the present invention;

[0026] Figure 5 The top view of the present invention.

[0027] In the figure: 1 fixed suction cup, 2 fixed base, 3 transverse measurement rotating shaft, 4 longitudinal measurement rotating shaft, 5 displacement measurement wire harness, 6 displacement sensor, 7 pressure sensor, 8 mounting plane, 9 foot pedal plane, 10 footrest fixing surface, 11 handheld terminal housing, 12 data wire harness, 13 high-density sponge, 14 fixing nail, 15 display screen, 16 switch, 17 operation button, 18 multi-functional interface, 19 calculation unit. Specific embodiments

[0028] The present invention will be further described below in conjunction with specific implementation cases.

[0029] A foot pedal stroke and load force measuring device, the composition of the measuring device is as Figure 1 , Figure 2 shown, mainly including a fixed suction cup 1, a fixed base 2, a transverse measurement rotating shaft 3, a longitudinal measurement rotating shaft 4, a displacement measurement wire harness 5, a displacement sensor 6, a pressure sensor 7, a mounting plane 8, a foot pedal plane 9, a footrest fixing surface 10, a handheld terminal housing 11, a data wire harness 12, a high-density sponge 13, a fixing nail 14, a display screen 15, a switch 16, an operation button 17, a multi-functional interface 18, and a calculation unit 19.

[0030] According to the functional partition, the foot pedal stroke and load force measuring device is divided into three major parts: a fixed end, a main body, and a handheld terminal. Among them, the fixed end is composed of a fixed suction cup 1, a fixed base 2, a transverse measurement rotating shaft 3, and a longitudinal measurement rotating shaft 4; the main body is composed of a displacement sensor 6, a pressure sensor 7, a mounting plane 8, a foot pedal plane 9, a footrest fixing surface 10, a high-density sponge 13, and a fixing nail 14; the handheld terminal is composed of a handheld terminal housing 11, a display screen 15, a switch 16, an operation button 17, a multi-functional interface 18, and a calculation unit 19. The fixed end is connected to the main body through a displacement measurement wire harness 5; the main body is connected to the handheld terminal through a data wire harness 12; there is no physical connection between the fixed end and the handheld terminal. Specifically:

[0031] The fixed-end part: The fixed suction cup 1 is made of rubber and is used to adsorb the fixed end on any plane. The other end of the fixed suction cup is connected to the fixed base 2, and the two together form a measurement reference for adsorption on the plane. The transverse measurement rotating shaft 3 and the longitudinal measurement rotating shaft 4 are installed on the fixed base 2. The transverse measurement rotating shaft 3 can rotate axially within the range of ±90° and collect the transverse rotation angle, with a graduation value of 1°. Similarly, the longitudinal measurement rotating shaft 4 can rotate axially within the range of ±90° and collect the longitudinal rotation angle, with a graduation value of 1°.

[0032] The main body part: The displacement measurement wire harness 5 connects the fixed end to the displacement sensor 6. The foot pedal plane 9 is installed on the installation plane 8. The displacement sensor 6 and the pressure sensor 7 are installed on the foot pedal plane 9. The displacement sensor 6 is used to measure and collect the actual displacement when the foot pedal mechanism moves, and the pressure sensor 7 is used to collect the load force applied by the operator to the foot pedal mechanism, and integrates the functions of data acquisition and data transmission of the displacement sensor.

[0033] Further, the sides of the displacement sensor 6 and the pressure sensor 7 facing the foot pedal mechanism are glued to one side of the installation plane 8. The foot pedal plane 9 is installed on the installation plane 8 through the fixing nails 14, and the displacement sensor and the pressure sensor are clamped between the two planes. The other side of the installation plane 8 is connected to the foot pedal fixing surface 10 through the high-density sponge 13, and the foot pedal fixing surface 10 is used to fit with the on-aircraft foot pedal.

[0034] The handheld terminal part: The calculation unit 19 is installed in the handheld terminal housing 11 and is connected to the main body through the data wire harness 12, and is used to collect the measurement parameters output by the main body. The display screen 15 embedded in the handheld terminal housing 11 is used to display the measurement results and guide the operator to operate. The switch 16 is used to control the power-on and power-off of the whole device. During use, the operator controls the options in the display screen through the operation button 17 according to the measurement requirements to realize operations such as result reading and difference calculation. After the measurement is completed, the measurement data is exported to the industrial control computer through the multi-functional interface 18 to realize the digital archiving of the measurement data.

[0035] When the present invention is specifically applied, it can realize the measurement of the foot pedal stroke and load force of the control system by a single person in the aircraft cockpit. The specific steps are as follows:

[0036] Step 1: Fix the main body part of the foot pedal stroke and load force measurement device (hereinafter referred to as the device) on the control system foot pedal to ensure that the foot pedal fixing surface 10 is completely fitted with the control system foot pedal without relative movement. At this time, the fixed suction cup 1 and the handheld terminal part can be placed randomly to avoid bumping with the system and the airframe structure.

[0037] Step 2: The operator stabilizes the main body of the device with feet, pulls out the displacement measurement wire harness 5, and at the same time, fixes the fixed suction cup 1 to any appropriate position on the cockpit floor. During the operation, the air in the fixed suction cup 1 needs to be exhausted. To ensure the measurement accuracy of the foot pedal displacement of the control system, when fixing the fixed suction cup 1, keep the axial direction of the transverse measurement rotating shaft 3 of the device consistent with the heading of the aircraft to be measured.

[0038] Step 3: After the main body of the device and the fixed suction cup 1 are firmly fixed, turn on the handheld terminal through the switch on its side and enter the measurement interface. When placing the main body, since there is a certain inclination angle between the foot pedal of the control system and the vertical line, in order to balance the force exerted by the device itself on the pressure sensor, the load force is cleared before measurement.

[0039] Step 4: According to the prompts on the screen of the handheld terminal, perform selection operations through the four operation buttons of "up", "down", "left", and "right" on the handheld terminal. A short press is for moving, and a long press is for confirmation. Enter the displacement measurement interface, select the measurement direction as longitudinal, calculate the longitudinal displacement when the foot pedal of the control system is in the initial position state at this time, and record it.

[0040] Step 5: The operator slowly and evenly pedals the main body fixed on the foot pedal of the control system in the cockpit. The force application point is on the foot pedal plane 9, and stops the foot pedal stroke at the limit position. Select "load force" on the screen of the handheld terminal. The value displayed at this time is the load force of the foot pedal of the control system; select "displacement", perform the same operation as the previous step, select the measurement direction as longitudinal, calculate the longitudinal displacement when the foot pedal of the control system is at the limit position at this time, and record it.

[0041] Step 6: The operator slowly stops applying force, and the foot pedal mechanism slowly returns to the middle position. At this time, the on-aircraft measurement is completed, and the operator can remove the main body of the device and store it properly.

[0042] Step 7: Through the picture prompts and operation buttons of the handheld terminal, calculate the difference between the two measured displacement values, and the result is the foot pedal stroke of the control system.

[0043] Step 8: After completing the on-aircraft test, connect the data cable of the industrial control computer to the multifunctional interface of the handheld terminal of the device, enter the test software of the industrial control computer, and the operator can import the process record and result of this measurement and archive them according to the actual situation.

[0044] The above embodiments only represent the implementation modes of the present invention, but should not be construed as limiting the scope of the patent of the present invention. It should be noted that for those skilled in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A pedal stroke and load force measuring device, characterized in that, The measuring device includes a fixed-end part, a main body, a handheld terminal, and a displacement measurement wire harness (5); The fixed end includes a fixed suction cup (1), a fixed base (2), a transverse measurement rotating shaft (3), and a longitudinal measurement rotating shaft (4); the main body includes a displacement sensor (6), a pressure sensor (7), a mounting plane (8), a foot pedal plane (9), a footrest fixing surface (10), a high-density sponge (13), and fixing nails (14); the fixed end is connected to the displacement sensor (6) of the main body through the displacement measurement wire harness (5); the main body is connected to the handheld terminal through a data wire harness (12); there is no physical connection between the fixed end and the handheld terminal.

2. The pedal stroke and load force measuring device according to claim 1, characterized in that The fixed end: The fixed suction cup (1) is used to adsorb the fixed end on any plane, and its other end is connected to the fixed base (2), and the two together form a measurement reference adsorbed on the plane; the transverse measurement rotating shaft (3) and the longitudinal measurement rotating shaft (4) are installed on the fixed base (2); the transverse measurement rotating shaft (3) can rotate axially within a range of ±90° and collect the transverse rotation angle, with a graduation value of 1°; the longitudinal measurement rotating shaft (4) can rotate axially within a range of ±90° and collect the longitudinal rotation angle, with a graduation value of 1°.

3. The pedal stroke and load force measuring device according to claim 2, characterized in that, The fixed suction cup (1) is a rubber part.

4. The pedal stroke and load force measuring device according to claim 1, characterized in that, The main body: The foot pedal plane (9) is installed on the mounting plane (8); the displacement sensor (6) and the pressure sensor (7) are installed on the foot pedal plane (9), and the displacement sensor (6) is used to measure and collect the true displacement amount when the footrest mechanism moves, and the pressure sensor (7) is used to collect the load force applied by the operator to the footrest mechanism, and integrates the functions of data acquisition and data transmission of the displacement sensor.

5. The pedal stroke and load force measuring device according to claim 4, wherein The sides of the displacement sensor (6) and the pressure sensor (7) facing the footrest mechanism are adhesively bonded to one side of the mounting plane (8), and the foot pedal plane (9) is installed on the mounting plane (8) through fixing nails (14).

6. The pedal stroke and load force measuring device according to claim 4, characterized in that The other side of the mounting plane (8) is connected to the footrest fixing surface (10) through a high-density sponge (13), and the footrest fixing surface (10) is used to fit with the on-board footrest.

7. A pedal stroke and load force measuring device according to claim 1, characterized in that, The handheld terminal includes a handheld terminal housing (11), a display screen (15), operation buttons (17), a multi-functional interface (18), and a calculation unit (19).

8. A pedal stroke and load force measuring device according to claim 7, characterized in that, The handheld terminal part: The calculation unit (19) is installed in the handheld terminal housing (11) and is connected to the main body through a data wire harness (12) for collecting the measurement parameters output by the main body; the display screen (15) embedded in the handheld terminal housing (11) is used to display the measurement results and guide the operator to operate; during use, the operator controls each option in the display screen through the operation buttons (17) according to the measurement requirements to realize the operations of result reading and difference calculation; after the measurement is completed, the measurement data is exported to the industrial control computer through the multi-functional interface (18) to realize the digital archiving of the measurement data.

9. A method for using the pedal stroke and load force measuring device according to any one of claims 1-8, characterized in that Including the following steps: Step 1: The foot pedal stroke and load force measuring device is hereinafter referred to as the device. Fix the main body of the device on the foot pedal of the control system to ensure that the foot pedal fixing surface (10) is completely fitted with the foot pedal of the control system without relative movement; at this time, the fixed suction cup (1) and the handheld terminal part can be placed arbitrarily. Step 2: The operator stabilizes the main body of the device with the foot and pulls out the displacement measurement wire harness (5). At the same time, fix the fixed suction cup (1) at any suitable position on the cockpit floor. Step 3: After the main body of the device and the fixed suction cup (1) are firmly fixed, start the handheld terminal and enter the measurement interface. Step 4: Enter the displacement measurement interface, and zero the load force before measurement; select the measurement direction as longitudinal, calculate the longitudinal displacement of the control system foot pedal in the initial position state at this time, and record it. Step 5: The operator slowly and evenly pedals the main body fixed on the foot pedal of the control system in the cockpit. The force application point is on the foot pedal plane (9), and the foot pedal stroke stays at the limit position. Calculate the longitudinal displacement of the control system foot pedal at the limit position at this time, and record it. Step 6: The operator slowly stops applying force, and the foot pedal mechanism slowly returns to the center. At this time, the on-board measurement is completed. Step 7: Through the screen prompt and operation buttons of the handheld terminal, calculate the difference between the displacement amounts measured twice, and the result is the foot pedal stroke of the control system.

10. The method of using a pedal stroke and load force measuring device according to any one of claims 1-8 as described in claim 9, characterized in that, In Step 2, when operating, it is necessary to evacuate the air in the fixed suction cup (1); to ensure the measurement accuracy of the displacement of the control system foot pedal, when the fixed suction cup (1) is fixed, the axial direction of the transverse measurement rotating shaft (3) of the device is the same as the heading of the aircraft to be measured.

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