Concrete mixing truck, and control apparatus and control method thereof

Abstract

The invention provides a concrete mixing truck, and a control apparatus and a control method thereof. The apparatus comprises a plurality of sensors and an intelligent controller; signals collected by the plurality of sensors at least comprise an engine rotating speed signal, a mixing drum rotating speed signal and a main oil pump displacement signal; the intelligent controller comprises an analysis module used for analyzing an expected mixing drum rotating speed based on a transit time of the transit mixing truck and a preset mixing drum revolution total frequency according to a concrete transit mixing standard, a mixing drum rotating speed control module used for controlling the mixing drum to mix concrete in the expected mixing drum rotating speed according to the mixing drum rotating speed signal or controlling the mixing drum rotating speed according to a preset concrete transmit mixing requirement, and an energy saving matching module used for controlling the engine rotating speed of the mixing truck and the main oil pump displacement according to a best fuel oil consumption curve. In the invention, the concrete mixing quality is guaranteed, and energy saving is also realized.

Description

technical field [0001] The invention relates to the control technology of a concrete mixer truck, and in particular to a concrete mixer truck, a control device and a control method thereof. Background technique [0002] Usually, construction sites are widely required to use commercial concrete for construction operations. Concrete materials (including water) are prepared in advance by the concrete mixing plant and loaded into the concrete mixer truck, and the concrete is required to ensure the original strength and usability when it is transported to the construction site. Spend. The strength and usability of the final concrete delivered to the construction site depends on the degree of mixing during transportation. Relevant requirements and standards for concrete mixing and transportation have been formulated at home and abroad according to the characteristics of domestic building materials. For example, the full-load concrete transportation standard recommended by the co...

AI Technical Summary

Problems solved by technology

The specific control method of this scheme is to use a set of controller and micro-motor to control the opening degree of the engine throttle to realize the control of the engine speed. During the use of this control system, the controller maintains the speed of the mixing drum at a certain level. In terms of speed, controlling the micro-motor frequently adjusts the displacement of the variable pump, causing excessive wear and tear on the variable-displacement mechanical structure of the pump, high temperature of the micro-motor, etc., seriously affecting the life and reliability of the system

And the speed setting of the mixing drum adopts fixed constant speed control, and the optimal speed of the mixing drum cannot be selected according to the actual situation, which is difficult to meet the needs of concrete mixing quality control in the process of concrete mixing and transportation

[0010] Usually, too few rotations of the mixing drum will lead to performance degradation when the concrete reaches the construction site, and too many rotations will cause excessive wear of the mixing blades and cause excessive fuel consumption of the mixer truck

At the same time, if the speed of the mixer drum fluctuates frequently during driving, it will affect the stable driving of the mixer truck, which will easily lead to uncomfortable driving experience and traffic accidents

[0011] In the control scheme of the existing concrete mixer truck, there is no effective automatic control of the rotation speed and the total number of rotations of the mixing drum in accordance with the JG / T5094-1997 standard, and the energy-saving power of the mixer truck in the loading and unloading condition. matching control scheme

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