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Functional safety type digital quantity input acquisition circuit and acquisition and diagnosis method thereof

A digital input, functional safety technology, applied in the direction of instruments, computer control, simulators, etc., can solve the problems of insufficient fault protection ability of digital input acquisition circuit without fault detection ability, etc., to improve reliability and realize fault detection. Effect

Inactive Publication Date: 2020-09-04
XUZHOU HEAVY MASCH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a functionally safe digital input acquisition circuit and its acquisition and diagnosis methods, so as to solve the problem of insufficient fault protection capability and no fault detection capability of the digital input acquisition circuit in the prior art. technical issues

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  • Functional safety type digital quantity input acquisition circuit and acquisition and diagnosis method thereof
  • Functional safety type digital quantity input acquisition circuit and acquisition and diagnosis method thereof
  • Functional safety type digital quantity input acquisition circuit and acquisition and diagnosis method thereof

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Embodiment Construction

[0039] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0040] In the prior art, an ordinary controller digital quantity acquisition circuit and a safety type controller digital quantity acquisition circuit are usually used for digital quantity acquisition. In order to enable those skilled in the art and related technical fields to understand the technical contents of the present invention more accurately, the related terminology is first explained as follows:

[0041] (1) Digital input module: DI module for short, usually used to collect high and low logic levels, such as switching on and off of a switch;

[0042] (2) 1oo2 Architecture: A redundant voting circuit structure consisting of two parallel channels, either of which can perform a security ...

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Abstract

The invention discloses a functional safety type digital quantity input acquisition circuit and an acquisition and diagnosis method thereof in the technical field of electrical control, and aims to solve the technical problems of insufficient fault protection capability and no fault detection capability of a digital quantity input acquisition circuit in the prior art. The acquisition circuit comprises a digital quantity input interface, a pull-up control circuit, a signal input circuit and a digital quantity acquisition MCU circuit. The digital quantity input interface is electrically connected with the digital quantity acquisition MCU circuit through the pull-up control circuit and the signal input circuit. The signal input circuit comprises a digital quantity input acquisition redundancyforward channel and a digital quantity input acquisition redundancy reverse channel which are connected in parallel and opposite to each other.

Description

technical field [0001] The invention relates to a function-safe digital quantity input acquisition circuit and its acquisition and diagnosis methods, which belong to the technical field of electric control. Background technique [0002] With the continuous improvement of functional safety requirements for special vehicles such as wheeled cranes and aerial work platforms in the construction machinery industry, ordinary construction machinery controllers can no longer meet the requirements for functional safety design and certification of construction machinery electrical systems. Functional safety controllers will Instead of ordinary controllers, in addition to completing the basic functions of ordinary controllers, it is also necessary to complete functions related to functional safety. [0003] Digital input acquisition modules are widely used in controllers. At present, digital input acquisition modules for ordinary controllers used in construction machinery can only compl...

Claims

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Application Information

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IPC IPC(8): G05B19/042
CPCG05B19/0425G05B2219/21155
Inventor 宋文生柴君飞齐行程张强唐正伟
Owner XUZHOU HEAVY MASCH CO LTD
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