Drive control device used for proportional valve

A proportional valve and drive unit technology, applied in valve devices, valve operation/release devices, electrical program control, etc., can solve problems affecting accuracy and safety, strong electromagnetic interference, and no feedback of control output results. Achieve the effect of improving accuracy and low interference, improving accuracy and safety, and improving safety

Inactive Publication Date: 2011-07-06
BEIJING AEONMED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The control method of PWM pulse width modulation is easy to chatter and has strong electromagnetic interference; while the topology of the constant current source control method is more complicated
Moreover, these two control circuits are open-loop control, and do not have the function of feedback of control output results, which affects the accuracy and safety of their applications.

Method used

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  • Drive control device used for proportional valve
  • Drive control device used for proportional valve
  • Drive control device used for proportional valve

Examples

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Embodiment Construction

[0020] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0021] figure 1 A block diagram of a proportional valve drive control device according to an embodiment of the present invention is shown, including: a drive unit 10 , a drive feedback unit 20 , a logic processing unit 30 and a power supply and protection unit 40 .

[0022] Such as figure 1 As shown, the logic processing unit 30 is respectively connected to the drive unit 10, the drive feedback unit 20 and the power supply and protection unit 30, the drive unit 10 is also connected to the drive feedback unit 20 and the proportional valve, and the power supply and protection unit 40 is also connected to the proportional valve , in this embodiment, the low-voltage analog control signal from the logic processing unit 30 is input to the drive unit 10, and the drive unit 10 converts the control voltage signal into a stable drive current ...

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PUM

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Abstract

The invention provides a drive control device used for a proportional valve, comprising a drive unit, a drive feedback unit, a logic processing unit and a power supply and protective unit, wherein, the drive unit is used for receiving the input of control signals, converting the control signals into drive signals, and controlling the opening of the proportional valve according to the drive signal; the drive feedback unit is connected with the drive unit, and is used for monitoring the drive signals of the drive unit, and providing a monitoring signal; the logic processing unit is connected with the drive feedback unit, is used for processing the monitoring signal output by the drive feedback unit, and providing a protective signal; and the power supply and protective unit is connected between the logic processing unit and the proportional valve, and is used for executing the protective operation of the proportional valve according to the protective signal output by a logic processing component. The drive control device can enable the proportional valve to have high accuracy and safety.

Description

technical field [0001] The invention relates to the field of medical ventilation equipment, in particular to a drive control device for a proportional valve. Background technique [0002] In the process of mechanically ventilating patients with medical ventilation equipment such as ventilators, it is very important to implement precise and safe control of the ventilation volume, especially for infants and critically ill patients. dangerous, even life-threatening. Therefore, the precise and safe control of the proportional valve that controls the ventilation flow has become a crucial link, that is, the drive circuit of the proportional valve is required to be able to drive the proportional valve accurately and safely. [0003] The design method of the proportional valve drive circuit is mainly based on the PWM pulse width modulation control method and the constant current source method. The control method of PWM pulse width modulation is easy to chatter and has strong elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/05F16K31/02
Inventor 郭伟
Owner BEIJING AEONMED
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