Paver paving speed instability, is the main factor affecting the pavement smoothness. The main reasons for instability are:
Engine speed change.
The change of volume ratio of hydraulic components.
The Change of Slip Rate.
These three aspects are associated with sudden changes in load during the paving operation. The constant speed of the paver can not be achieved only by controlling the throttle of the engine or by manually controlling the variable displacement pump (the precise control of the paving speed can not be guaranteed). Most modern paver machines are fitted with a speed sensor, The speed signal and set the speed of contrast processing, and then output signal control walking variable pump; constant power control system installed at the same time to ensure that the sudden increase in load when the engine is not an effective means of speed, that is, the system automatically allocate power, When the engine is out of speed, the spiral and vibrating power consumption system will automatically adjust the screw speed and vibration frequency, reduce the power of the hydraulic system, avoid the speed dropping, realize uniform paving and ensure smoothness.[url=http://smallroadroller.com]Small Road Roller - Shanghai Doan Machinery Technology Co.,Ltd[/url]

Automatic leveling control system
Automatic leveling control system from the type of data source can be divided into analog signals and digital signals, digital controller not only improves the control accuracy of the system, but also improves the overall performance of the system: If the fault alarm, fault diagnosis, display operating status And so on, has been widely used.Data acquisition methods are divided into: contact and non-contact. Contact leveling has pull the steel fiber and dragging long boots, are relatively easy to implement, simple, less investment, can achieve vertical, contact within the limited flatness; non-contact leveling with ultrasonic and laser two forms, Can be high precision, high reliability, comprehensive compensation correction bias, to achieve the automatic leveling system network, intelligent control. The technology is mature, multi-group multi-probe intelligent control system, detection range, high precision, comprehensive compensation correction bias, can alternate the use of surface reference and line reference, can achieve large-scale Of the flatness control.
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