Stay type tachometer

Abstract

The invention relates to a stay type tachometer which comprises two tachometers connected with each other by a circuit. Each tachometer comprises a tachometer case, a laser transmitter and a laser receiver are respectively arranged on two corresponding inner walls of the tachometer case, a draw bar sleeve is arranged between the laser transmitter and the laser receiver and is fixed onto a bottom plate of the tachometer case, a draw bar is arranged on the draw bar sleeve, a trigger block is arranged on the draw bar, one end of the draw bar is connected with the corresponding inner wall of the tachometer case by a first return spring, and the other end of the draw bar is connected with a stay. The stay type tachometer has the advantages that the stay type tachometer can measure speeds continuously around the clock under complicated weather conditions in severe natural environments with large quantities of flying gravel, sandy soil and dust, is simple in structure, convenient to install, precise in speed measurement and stabile in performance and is portable.

Description

technical field [0001] The invention relates to a rope-drawing speedometer. Background technique [0002] With the continuous development of traffic safety in our country, it is very important to accurately measure the speed of vehicles on various traffic sections, especially the precise speed measurement of vehicles on special road sections. At present, the speed measuring devices of motor vehicles in my country are mainly non-contact laser speed measuring instruments and radar speed measuring instruments. However, ordinary laser speed measuring, radar speed measuring and other speed measuring methods are easily affected by harsh natural environments, climatic conditions, and complex weather conditions. It achieves uninterrupted measurement around the clock, especially when it is used on special road sections, such as vehicle speed measurement in the avoidance lane, there will be a lot of flying gravel and dust, so that the traditional laser speedometer cannot accurately mea...

AI Technical Summary

Problems solved by technology

At present, the speed measuring devices of motor vehicles in my country are mainly non-contact laser speed measuring instruments and radar speed measuring instruments. However, ordinary laser speed measuring, radar speed measuring and other speed measuring methods are easily affected by harsh natural environments, climatic conditions, and complex weather conditions. Achieve all-weather uninterrupted measurement, especially when it is used on special road sections, such as the vehicle speed measurement process in the avoidance lane, there will be a lot of flying gravel and dust, making the traditional laser speedometer unable to accurately measure the real speed of the vehicle

In short, when the traditional non-contact speedometer is used on a special road section, it exposes many insurmountable difficulties.

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