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Analog-to-digital conversion error self-correction device and method

A technology of analog-to-digital conversion and analog-to-digital converter, applied in the direction of analog/digital conversion calibration/testing, etc., can solve problems such as wrong collection results, and achieve the effect of compensating conversion parameters

Active Publication Date: 2014-06-25
SHANGHAI FUXIN INTELLIGENT TRANSPORTATION SOLUTIONS
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In industrial control systems and safety signal systems, it is often necessary to control the acquisition error of analog-to-digital conversion to ensure that the acquisition error is within a certain range, otherwise it may lead to wrong acquisition results and cause serious consequences

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  • Analog-to-digital conversion error self-correction device and method
  • Analog-to-digital conversion error self-correction device and method

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Embodiment Construction

[0024] The invention provides a circuit structure and method for self-correction of analog-to-digital conversion errors. It can avoid the accuracy deterioration and uncontrollability of the analog-to-digital conversion device due to the inconsistent performance of the individual analog-to-digital conversion devices and the change of the application environment. The structure and method can dynamically compensate the conversion parameters of the analog-to-digital converter.

[0025] The structure and method for self-correction of analog-to-digital conversion errors provided by the present invention can be applied to fields including but not limited to safety signal systems, industrial control systems, and the like.

[0026] The circuit part of the method for self-correction of the analog-to-digital conversion error described in the present invention is as follows: figure 2 As shown, it consists of a current limiting resistor 1, a voltage reference chip 2, a reference voltage d...

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Abstract

The invention discloses an analog-to-digital conversion error self-correction device and method. The device comprises a number of reference voltage input ends and analog signal input ends, an analog switch, a voltage follower, an analog-to-digital converter and a microcontroller. A number of reference voltage input ends and analog signal input ends are respectively connected with the analog switch. The analog switch is connected with the voltage follower. The voltage follower is connected with the analog-to-digital converter. The analog-to-digital converter is connected with the microcontroller. The microcontroller outputs a channel gating signal to the analog switch. According to the invention, deteriorated and uncontrollable accuracy of the analog-to-digital converter under the circumstances of inconsistent performances between analog-to-digital converter individuals, changed application environment and the like can be avoided, and dynamic compensation can be carried out on the conversion parameters of the analog-to-digital converter.

Description

technical field [0001] The invention discloses a device and method for error self-correction of analog-to-digital converters that can be applied to safety signal systems, industrial control signal systems and other systems. Background technique [0002] In industrial control systems and safety signal systems (applied to avionics, railway signals, nuclear power and other industries), the signal of the system analog sensor is generally collected by an analog-to-digital converter (ADC), and the obtained digital value is sent to the microcontroller After processing. [0003] Such as figure 1 As shown, it is a common circuit structure of an analog input channel at present, and the circuit is composed of a voltage follower circuit 9 , an analog-to-digital converter 10 , and a microcontroller circuit 11 . Because the precision of the analog-to-digital converter circuit will vary with the influence of factors such as product batches and ambient temperature. When the accuracy of t...

Claims

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Application Information

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IPC IPC(8): H03M1/10
Inventor 谌锋杨朝霞俞泓崔捷浩王军伟
Owner SHANGHAI FUXIN INTELLIGENT TRANSPORTATION SOLUTIONS
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