A variable height magnetic scale tape arrangement device

Abstract

The invention discloses a variable height magnetic grid ruler band arrangement device and belongs to the control lever displacement measurement technology field. The device is characterized in that two ends of a first rocker arm are provided with first tooth type portions; two ends of a second rocker arm are provided with second tooth type portions; the second tooth type portions are mutually engaged with the first tooth type portions so that a motion track of a center of a circle of an arc slide rail is vertical to a pedestal; the first rocker arm and the second rocker arm are divided into two segments along a center, the two segmented portions are screwed together through a locking screw and are mutually rotated; two ends of the first rocker arm and the second rocker arm are connected toan arc guide rail and the pedestal; and a graduation ruler is detachably arranged on the pedestal. During usage, one end is in a free state and the other end is hinged to the pedestal and is maintained to be vertical to the pedestal; and a height position of the arc slide rail and an installation position of the pedestal are adjusted so that the center of the circle of the arc guide rail is completely superposed with a rotation center of a control lever, and rotation displacements of the rotation center and an installation plane to different levers can be measured.

Description

technical field [0001] The invention belongs to the technical field of displacement measurement of a helicopter joystick, and in particular relates to a variable-height magnetic grating tape arrangement device. Background technique [0002] The on-board ground test of the dynamic characteristics of the helicopter flight control system is a test for verifying the actual physical characteristics of the helicopter flight control system to determine the compliance between the actual physical characteristics and the design requirements, which is crucial to ensure the safety of the helicopter flight control effect, and the displacement of the joystick is one of the key test parameters of the test. [0003] In the past, the following devices and methods were used to test the displacement of the joystick in the test: [0004] 1. Use a pull-wire displacement sensor to measure the straight-line distance from the test point of the joystick to the outlet of the sensor pull-wire; [00...

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Problems solved by technology

Therefore, for the helicopter joystick system whose angular displacement of each joystick is between 20°-40°, there is a large error in the joystick displacement measured by this method.

[0008] Secondly, the joystick displacement obtained by the above-mentioned second device and method is difficult to meet the requirements of the test task. The reason is that the movement of the joystick in this test task is an instantaneous step movement or a high-frequency oscillation movement. There are high requirements for response speed, and it is difficult for the existing angle sensors in the laboratory to meet such high response speed requirements, and it is difficult to ensure the accuracy of data

[0009] Finally, the above-mentioned third device and method are similar to the principle of the present invention, but because the parameters of each control channel of each model, that is, the radius of rotation at each joystick test point, are not the same, each test needs to process arcs with different radii. Due to the different parameters of each channel of the same model, there are two or more specifications of the curved ruler to be processed, and the device has poor versatility and economy; at the same time, it requires a lot of time to install the curved ruler with this method. Auxiliary installation equipment, such as magnetic meter bases, extension rods, fixed bolts and nuts, etc., are extremely inconvenient to install and debug, especially for the test tasks carried out on helicopters, where the operating space is narrow and small parts are easy to drop, which in turn brings great security risk

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