Device and method for accurately locating linear push rod

Abstract

The invention discloses a device and a method for accurately locating a linear push rod. The device comprises a base frame arranged at the bottom of a base, as well as the linear push rod and a vertical rod which are arranged on the base frame, wherein the linear push rod pushes the vertical rod to rotate and touches limiters; feature locating patterns are arranged on the base frame; a scanner isarranged on the vertical rod; after the limiters transmit a signal, the linear push rod stops rotating; the scanner continuously scans the feature locating patterns and judges whether the vertical rodis accurately located or not; if not, the linear push rod rotates in a fine tuning manner, and the vertical rod is continuously adjusted until the vertical rod is accurately located. The device and the method disclosed by the invention have the advantages that broad localization of the limiter is combined with accurate location of the scanner, and no structure of the linear push rod needs to be changed; the accurate localization depends on position judgment of the scanner to the feature locating patterns and can be suitable for linear push rods with any model numbers; the quantity of the limiters and the mounting positions are not limited and accurate location of multiple positions can be realized.

Description

technical field [0001] The invention relates to the field of vehicle-mounted mobile measurement, in particular to a device and method for precise positioning of a linear push rod. Background technique [0002] With the rise of digital maps, the accuracy and timeliness of map information has become one of the important factors for users to choose digital maps. In order to obtain various map information in a timely and accurate manner, it is necessary to use a vehicle-mounted mobile measurement system for measurement. In order to meet the measurement requirements, a linear push rod is installed on the roof to change the installation position of the structural parts. A measuring device is installed to measure map information. If the linear actuator cannot be positioned accurately, it will take a lot of time to correct the obtained data later, which not only increases the workload, but also prolongs the time for the digital map to go online. [0003] The linear push rods provi...

AI Technical Summary

Problems solved by technology

[0003] The linear push rods provided by the prior art generally change the structure of the push rod itself. If the push rod is used for a long time, the internal limit structure will be displaced by the limit device or mechanical friction due to friction or external vibration. Loss will lead to the failure of the function of the limit contact, which will cause the motor to fail to cut off the circuit, and the motor will continue to rotate to push the straight rod to move. If there are other structural parts on the path of the push rod, it will damage the structural parts and also It will damage the push rod; and most of the linear push rods are fixed in a vertical limit mode, that is, there is only one vertical position limit. When the system requires positioning in multiple positions, it has certain difficulties

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