Device for measuring and adjusting weight, center of gravity and rotary inertia of ship model

Abstract

The invention aims at providing a device for measuring and adjusting weight, center of gravity and rotary inertia of a ship model, which comprises a frame, a knife edge, a knife groove, a substrate, a wheel, a sensor and a base. The invention has high measuring and adjusting accuracy, reduces the error caused by angular surveying through an angle amplifying module and further improves the measuring and adjusting accuracy of the device. The invention has good stability, and the center of gravity of the system formed by the inner rotary part and the ship mode is located below the rotary knife edge, thereby increasing the restoring torque and improving the stability of the rotary system. The inner rotary part and the outer support part are designed in a form that ensures that the measurement and adjustment of weight, center of gravity and rotary inertia of the ship model including rolling rotary inertia can be realized conveniently. The invention integrates measurement and adjustment, i.e. the device measures weight, the center of gravity and rotary inertia of the ship model into a whole.

Description

technical field [0001] The invention relates to a measuring instrument, in particular to a device for measuring and adjusting the physical quantity of a mechanical structure. Background technique [0002] The ship model tank test is used to simulate the real sailing state of a real ship. In order to make the test data closer to the real state, the gravity and inertia of the ship model and the real ship must be kept similar. In the test preparation, the parameters of the model must be adjusted according to the needs and given values: the weight, center of gravity and moment of inertia of the ship model. The weight of the ship model is the basis for measuring other parameters of the ship model. The measurement and calculation process of many performance parameters of the ship model are based on the weight of the ship model. Therefore, the measurement of the weight of the ship model must be carried out as accurately as possible, especially In the ship resistance test, the acc...

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Problems solved by technology

[0005] Through literature search, it is found that the Chinese patent publication number is CN 1544888A, and the patent name is: digital ship model inertia adjustment frame. The device invented by this patent improves the accuracy and efficiency of the measurement and adjustment of the weight, center of gravity and moment of inertia of the ship model to a certain extent. , but there are the following disadvantages: (1) The center of gravity of the inertia frame and the ship model is above the rotating knife edge, and the center of gravity of the rotating system composed of the inertia frame and the ship model is high, and it is difficult to maintain stability when rotating and loading, which reduces the accuracy of measurement and adjustment and efficiency; (2) The vertical position of the center of gravity and the moment of inertia are measured using the principle of a micro-complex pendulum. The rotation angle of the system is small, and the rotation angle of the rotation system is not enlarged, which brings a large angle measurement error and reduces the measurement accuracy; (3) Its structure is inconvenient to measure the moment of inertia of ship model roll

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