Programmable rotating speed signal device based on software and hardware dual TMR type

Abstract

The invention discloses a programmable rotating speed signal device based on a software and hardware dual TMR type. The programmable rotating speed signal device comprises a first control module, a second control module and a third control module. The first control module and the second control module are in two-way data connection, the second control module and the third control module are in two-way data connection, and the first control module and the third control module are in two-way data connection. According to the programmable rotating speed signal device based on the software and hardware dual TMR type, the output mode that the three control modules simultaneously work is adopted, three paths of input signals are analyzed and output inside each control module through software, output signals of the three independent control modules are subjected to hardware TMR vote output, and then the dual TMR purpose is achieved. An independent measuring circuit and an independent power supply circuit are arranged inside each control module, the reliability and stability of the device are greatly improved, and safe and stable operation of a hydroelectric generating set is effectively improved.

Description

technical field [0001] The invention relates to the technical field of rotational speed signal devices, in particular to a dual TMR type programmable rotational speed signal device based on software and hardware. Background technique [0002] The traditional speed signal device and the speed signal device based only on probe level or software level redundancy have the following problems: 1. There is only one control module or PLC or single-chip microcomputer in the hardware main circuit. When the control module level module or DI, DO of the PLC body When a module fails, the entire device is in a state of failure or collapse; 2. When the single-hardware TMR redundant speed signal device is working, if there is any failure in the PT system loop or the ZVPU loop, it will cause TMR to exit and cannot To achieve the purpose of TMR; 3. A single hardware TMR type redundant speed signal device is usually equipped with a power supply system. When the switching power supply in the dev...

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Problems solved by technology

[0002] The traditional speed signal device and the speed signal device based only on probe level or software level redundancy have the following problems: 1. There is only one control module or PLC or single-chip microcomputer in the hardware main circuit. When the control module level module or DI, DO of the PLC body When a module fails, the entire device is in a state of failure or collapse; 2. When the single-hardware TMR redundant speed signal device is working, if there is any failure in the PT system loop or the ZVPU loop, it will cause TMR to exit and cannot To achieve the purpose of TMR; 3. Single hardware TMR type redundant speed signal device, usually set a set of power supply system, when the switching power supply in the device body fails, the system stops working

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