Device and method for dynamic diagnosis of multi-channel ADC crosstalk

A technology of diagnostic device and diagnostic method, applied in general control systems, program control, instruments, etc., can solve problems such as inaccurate data and no way to find out, etc.

Active Publication Date: 2019-10-18
CHINA NUCLEAR CONTROL SYST ENG
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  • Claims
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Problems solved by technology

[0004] For the acquisition of a large number of analog signals, multi-channel ADC acquisition circuits are usually used, and crosstalk between multi-channel ADCs is an easy problem. If there is multi-channel crosstalk without knowing it, the collected data may be inaccurate. And there is no way to find out, which leads to serious problems in the use of subsequent data and equipment control

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  • Device and method for dynamic diagnosis of multi-channel ADC crosstalk

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Embodiment 1

[0033] Such as figure 1 As shown, a dynamic diagnostic device for multi-channel ADC crosstalk includes a data processing unit. The ADC has 8 input channels IN1 to IN8 (only the first input channel IN1 and the eighth input channel IN8 are shown in the figure. ), each channel is connected to the input signal through an input control switch, and each channel is also connected to the ground through a ground control switch and connected to the reference voltage through a reference voltage control switch, and the output signal of the ADC is sent to the data processing through the bus unit, the ADC and the CPU are also connected through a digital isolator, and the digital isolator is used for bus isolation between the ADC and the CPU; the input control switch, reference voltage control switch and ground control switch (hereinafter collectively referred to as "channel switch") All are connected with the data processing unit, and the state of these channel switches is controlled by the...

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Abstract

The invention discloses a dynamic diagnosis device and a dynamic diagnosis method for crosstalk of a multi-channel ADC. The dynamic diagnosis device comprises a data processing unit. The ADC has M input channels, and the M is a natural number not less than 2. An output signal of the ADC is sent to the data processing unit. Each channel is connected with an input signal by means of an input controlswitch, is further connected to the ground by means of a grounding control switch, and is connected to a reference voltage by means of a reference voltage control switch. The dynamic diagnosis deviceand the dynamic diagnosis method can quickly diagnose crosstalk among the multi-channel ADC, can complete the ADC interchannel crosstalk diagnosis and channel normal acquisition functions within a cycle, so as to achieve the real-time performance of diagnosis and reliability of data acquisition, and support the design of an acquisition circuit with high diagnostic coverage.

Description

technical field [0001] The invention relates to the technical field of data acquisition, in particular to a dynamic diagnosis device and method for multi-channel ADC crosstalk. Background technique [0002] In the field of industrial control, especially in the field of digital instrumentation and control of nuclear power plants, a large number of analog output sensors will be used, so a large number of analog signals will be collected and monitored in real time through the control system. [0003] The nuclear power field is a field that has particularly high requirements for safety and reliability, so the acquisition system must ensure safety and high reliability. [0004] For the acquisition of a large number of analog signals, multi-channel ADC acquisition circuits are usually used, and crosstalk between multi-channel ADCs is an easy problem. If there is multi-channel crosstalk without knowing it, the collected data may be inaccurate. And there is no way to find out, whic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/042
Inventor 马权罗琦周静刘明星吴志强任俊如梁建王远兵韩文兴
Owner CHINA NUCLEAR CONTROL SYST ENG
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