Device and method of interface for achieving connection of distributed control system and measuring device

Abstract

The invention discloses a device and method of an interface for achieving connection of a distributed control system and a measuring device. The device comprises multiple branches of input channels, an isolating module and a control module. Each input channel comprises a simulation data collecting module of an AI channel, a filter capacitor and a shaping module, wherein the filter capacitor and the shaping module are in a highway addressable remote transducer (HART) channel. The filter capacitor filters and outputs HART signals, the shaping module strobes input or output HART signals to conduct shaping and filtering. A control module processes the shaped and filtered HART signals to obtain HART data, simultaneously simulation current signals input from the AI channel are processed into current data, and the HART data and the current data are transmitted to a distributed control system processing unit (DPU). By means of the device and method, industrial signals are transmitted between the distributed control system (DCS) device and an intelligent measuring device, simultaneously bi-directional digital communication is conducted conveniently, a signal transmission method is greatly simplified, and the reliability of the interface is improved through redundancy design.

Description

technical field

[0001] The invention relates to a data exchange technology of a distributed control system (DCS, Distributed Control System), in particular to an interface device and a method for realizing the interconnection between a distributed control system and an intelligent measuring device. Background technique

[0002] The distributed control system is a multi-level computer system composed of a process control level and a process monitoring level with a communication network as a link. It integrates computer (Computer), communication (Communication), display (CRT) and control (Control) technologies. (that is, 4C technology), the basic idea is to realize the decentralized control of the system, centralized operation, hierarchical management, flexible configuration and convenient configuration. DCS has the functions of data acquisition, direct digital control, human-computer interaction, monitoring and management.

[0003] Since the advent of the distributed control...

Examples

Embodiment Construction

[0046] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments. It should be understood that the following examples are only used to illustrate and explain the present invention, but not to limit the technical solution of the present invention.

[0047] The embodiment of the input interface device realizing the interconnection between the distributed control system and the intelligent measuring equipment of the present invention, its principle is as follows figure 1 As shown, including multiple input channels, isolation modules and control modules, where:

[0048] In addition to the analog input (AI) channel, each input channel also includes a filter capacitor (Ci, i=1~16) and a shaping module (i, i=1~16) of the HART channel, where:

[0049] One end of the filter capacitor is connected to the first input terminal (In ia, i=1~16) of the corresponding input channel, and the other ...

technical field

[0001] The invention relates to a data exchange technology of a distributed control system (DCS, Distributed Control System), in particular to an interface device and a method for realizing the interconnection between a distributed control system and an intelligent measuring device. Background technique

[0002] The distributed control system is a multi-level computer system composed of a process control level and a process monitoring level with a communication network as a link. It integrates computer (Computer), communication (Communication), display (CRT) and control (Control) technologies. (that is, 4C technology), the basic idea is to realize the decentralized control of the system, centralized operation, hierarchical management, flexible configuration and convenient configuration. DCS has the functions of data acquisition, direct digital control, human-computer interaction, monitoring and management.

[0003] Since the advent of the distributed control...

Examples

Embodiment Construction

[0046] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments. It should be understood that the following examples are only used to illustrate and explain the present invention, but not to limit the technical solution of the present invention.

[0047] The embodiment of the input interface device realizing the interconnection between the distributed control system and the intelligent measuring equipment of the present invention, its principle is as follows figure 1 As shown, including multiple input channels, isolation modules and control modules, where:

[0048] In addition to the analog input (AI) channel, each input channel also includes a filter capacitor (Ci, i=1~16) and a shaping module (i, i=1~16) of the HART channel, where:

[0049] One end of the filter capacitor is connected to the first input terminal (In ia, i=1~16) of the corresponding input channel, and the other ...

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