Embedded proportional controller

A proportional controller, embedded technology, applied in the field of hydraulic control, can solve the problems of inconvenient operation and adjustment, unreadable data, single control function, etc. Effect

Inactive Publication Date: 2011-09-14
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, analog proportional controllers have disadvantages such as inconvenient operation and adjustment, easy wear and damage of adjusting potentiometers, unreadable data and inability to communicate with other devices, inherent temperature drift characteristics, and difficulty in ensuring control accuracy and reliability. And the control function is single, once it is made, the circuit must be replaced to change the function

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] see figure 1 and Figure 5 , the embedded proportional controller includes a housing and a circuit board installed in the housing. The circuit structure on the circuit board is composed of an embedded microprocessor and peripheral circuits connected to the embedded microprocessor and for the embedded microprocessor and It consists of a power supply module powered by peripheral circuits. The embedded microprocessor includes an A / D conversion unit, a memory and PWM output control unit, a digital input and output unit, a logic control unit and an interface control unit. The peripheral circuit includes an input signal conditioning circuit, a power amplifier circuit, a display circuit, a feedback indicating circuit, an RS232 interface circuit, a keyboard input circuit and a power supply module. The voltage input terminal and the current input terminal are connected to the A / D conversion unit through the input signal conditioning circuit, the power amplifier circuit is conne...

Embodiment 2

[0021] This embodiment is basically the same as Embodiment 1, and the special features are as follows:

[0022] The voltage input terminal 10 is connected to the A / D conversion unit 241 through the input signal conditioning circuit 21 through the U / U conversion circuit 19, and the current input terminal 10 is connected to the A / D conversion unit 241 through the input signal conditioning circuit 21 through the I / U conversion circuit 20. The D conversion unit 241 is connected, and the voltage input terminal 10 and the current input terminal 11 are connected to the terminal post 9 on the rear terminal panel 8 of the casing 1 .

[0023] The display circuit 27 is connected with a nixie tube 5 installed on the front control panel 3 of the casing 1 .

[0024] The lower side of the front control panel 3 of the housing 1 is arranged with six adjustment knobs 4 connected to the circuit board 6 .

Embodiment 3

[0026] Such as figure 1 The embedded proportional controller shown is based on an embedded microprocessor, which includes an A / D conversion unit, a PWM output control unit, a logic control unit, a digital input and output unit, an interface control unit, and a memory. In the three-dimensional perspective view of the embedded proportional controller shown in Figure 6, the embedded microprocessor and various peripheral circuits are all printed on the circuit board 6, and the circuit board 6 receives the voltage input by the terminal 9 on the rear wiring panel 8 or After the current signal is converted into a digital signal by the input conditioning circuit and the A / D conversion unit, it is input to the embedded microprocessor, and the digital signal can also be directly input to the embedded microprocessor through the peripheral keyboard input circuit, and the embedded microprocessor can directly input the digital signal to the embedded microprocessor. Adjustment and processing...

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PUM

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Abstract

The invention relates to an embedded proportional controller, which comprises a housing and a circuit board arranged therein. A circuit structure on the circuit board comprises an embedded microprocessor, a peripheral circuit connected with the embedded microprocessor, and a power supply module which supplies power for the embedded microprocessor and the peripheral circuit, wherein, the embedded microprocessor comprises an A/D converting unit, a memory and PWM output control unit, a digital quantity input and output unit, a logic control unit and an interface control unit, the peripheral circuit comprises an input signal conditioning circuit, a power amplification circuit, a display unit, a feedback indication circuit, an RS232 interface circuit, a keyboard entry circuit and a power supply module. An voltage input terminal and a current input terminal are connected with the A/D converting unit via the input signal conditioning circuit, the power amplification circuit is connected with the PWM output control unit, and the display circuit is connected with the digital quantity input and output unit. The embedded proportional controller is convenient in signal processing and strong in anti-interference capability, and can communicate with an upper computer. By the invention, only software parameters need to be changed corresponding to different proportioning valves, allowing no change to hardware circuit.

Description

technical field [0001] The invention relates to a proportional controller, which is a device for controlling and driving various electro-hydraulic proportional valves, and belongs to the technical field of hydraulic control. Background technique [0002] The proportional controller is the control and drive device of the electro-hydraulic proportional valve. At present, most of the existing proportional controllers are composed of analog circuits to complete functions such as ramp time adjustment, frequency adjustment, gain adjustment and power amplification of the control signal. However, analog proportional controllers have disadvantages such as inconvenient operation and adjustment, easy wear and damage of adjusting potentiometers, unreadable data and inability to communicate with other devices, inherent temperature drift characteristics, and difficulty in ensuring control accuracy and reliability. And the control function is single, once it is made, the circuit must be r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D11/13
Inventor 程大伟邢科礼金侠杰
Owner SHANGHAI UNIV
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