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Agitating lorry constant-speed control method

A technology of constant speed control and mixer truck, which is applied to control devices, cement mixing devices, chemical instruments and methods, etc., can solve the problems of high cost and unsuitable popularization of constant speed control methods, and achieve convenient operation, quality assurance, and reduction of cost effect

Inactive Publication Date: 2012-06-06
SHANGHAI QUNMEI INDAL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The constant speed control method using this control method has the problem of high cost and is not suitable for popularization in China

Method used

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  • Agitating lorry constant-speed control method
  • Agitating lorry constant-speed control method
  • Agitating lorry constant-speed control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0019] like image 3 As shown, a constant speed control method for a mixer truck provided by the present invention includes the following steps:

[0020] Step 1. The user inputs the target speed, industrial and mining data into the controller through the main control panel, and the controller combines the target speed with the formula Calculate the current output to the proportional valve, where I represents the proportional valve current, Indicates the target speed of the mixing bucket, represents the target engine speed, Indicates the dead zone current of the proportional valve, K is a constant. The controller adopts PID closed-loop control through PWM mode to realize high-precision output of proportional valve current.

[0021] Step 2. The controller outputs the throttle control voltage to the engine ECU, measures the actual engine speed through feedback, and adjusts the engine speed to the specified .

[0022] Step 3. The proportional valve controls the...

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Abstract

The invention relates to an agitating lorry constant-speed control method. The agitating lorry constant-speed control method is characterized in that two PWM signals are output to a control interface of a proportional valve by a singlechip, is subjected to power amplification, is output to the proportional valve, is fed back to the control interface of the proportional valve, is subjected to current sampling, wherein the current sampling is carried out by the control interface of the proportional valve, is subjected to amplification filtering, and is output to an analog digital conversion input port of the singlechip; the singlechip can carry out closed-loop control by a PID algorithm and output an appointed current to the proportional valve; an engine ECU outputs an engine speed signal to the singlechip through an engine speed input interface; and the singlechip can calculate an engine speed in a pulse width measurement way. The agitating lorry constant-speed control method adopts an open-loop control technology so that a rotation rate sensor needed in closed-loop control is avoided; a cost is reduced; high-precision constant-speed control of a concrete agitating and conveying lorry is realized; concrete quality is guaranteed in conveying; and a conveying distance is extended. The agitating lorry constant-speed control method also adopts a wireless remote control display technology so that user operation is very convenient.

Description

technical field [0001] The invention relates to a constant speed control method of a mixer truck, which is used for reversing and speed regulation control of a mixing tank during the process of feeding, conveying and discharging a concrete mixer truck. Background technique [0002] With the wide application of commercial concrete, the mixer truck has become an indispensable means of transportation. Due to cost constraints, most mixer trucks are powered by the engine chassis. During transportation, with the different road conditions, the rotation speed of the mixing drum will be unstable, and the concrete flow in the drum will be uneven, which will affect the quality of the concrete. On the other hand, when the mixer truck is distributing materials, it is also necessary to control the output speed; when feeding, the feeding speed needs to be adjusted according to different types of concrete. In order to solve the above problems, there have been several constant spee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28C5/42B28C7/02
Inventor 蒋飞翔
Owner SHANGHAI QUNMEI INDAL
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