Passenger car mass center position measurement device and measurement and calculation method

Abstract

The present invention relates to a passenger car mass center position measurement device and measurement and calculation method, and belongs to the automobile test field. The passenger car mass center position measurement device and measurement and calculation method comprises a hydraulic jack, an induction type displacement sensor, a rubber blanket with a groove, a stay wire displacement sensor, a wheeled pallet, a front wheel position laser range finder, a back wheel position laser range finder, a jack position laser range finder, a front wheel sucker type laser range finder installing device, a back wheel sucker type laser range finder installing device, a jack position movable laser range finder installing device, a wheel load instrument, an information conditioning device, a data collection card, a computer and a measured passenger car, and is characterized in that after an automobile is lifted by the hydraulic jack, the wheel load instrument measures the loads of the shafts of the passenger car, the laser range finders measure the wheel base and the lifted height of the passenger car, and the data is sent to the computer to process, thereby obtaining the concrete position of the mass center of the passenger car. The device is simple in structure, high in measurement precision and wide in application range.

Description

technical field [0001] The invention includes a passenger car mass center position measuring device and a measuring and calculating method, belonging to the field of automobile testing. Background technique [0002] The position of the center of mass of a car is an important parameter of the car, which has a major impact on the handling stability, braking performance, and safety of the car. As a commercial vehicle for carrying passengers and their luggage, the safety of passenger cars is particularly important, and the position of the center of mass height Measurement plays an important role in the development and commissioning of passenger cars. [0003] At present, there are many methods for measuring the position of the center of mass of a car, such as the swing method, the suspension method, the platform support reaction force method, and the mass response method, but these methods all require large measuring tools or the construction of a large working platform. Place ...

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Problems solved by technology

[0003] At present, there are many methods for measuring the position of the center of mass of a car, such as the swing method, the suspension method, the platform support reaction force method, and the mass response method, but these methods all require large measuring tools or the construction of a large working platform. Place it on a swinging experimental platform, and calculate the height of the center of mass of the car according to the principle of single-degree-of-freedom weak damping and micro-vibration, but the platform needs to be large, and it is inconvenient to change the experimental location; the suspension method must pass through the vertical plane of the suspension point when the object is freely suspended The position of the center of mass is determined by the principle of the principle, because more than three suspension points need to be selected, and larger lifting equipment is required for lifting, which is still not very convenient; the platform support reaction method needs to place the vehicle under test on the platform, and the laboratory Lifting the car and the platform to a certain angle at the same time to measure the redistribution of mass and calculate the position of the center of mass requires a large platform; in the mass response method, the laboratory lifts one end of the car, which will cause certain damage to the experimental car

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