Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for high precision collecting weak signal and circuit thereof

A weak signal, high-precision technology, applied in signal transmission systems, electrical signal transmission systems, instruments, etc., to achieve the effect of measurement

Inactive Publication Date: 2006-09-20
TIANJIN UNIV
View PDF2 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many people who have studied various data acquisition systems: for example, invention patents designed by Wang Lixin (a high-speed and large-capacity data acquisition system based on CPLD and SDRAM, application number CN200410043813.5) and invention patents designed by Wang Guyin (multiple channel high-speed data acquisition device, application number CN89106196.7), etc., but the above-mentioned design can only obtain the precision of the analog-to-digital converter (Analog Digital Convertor, ADC) adopted in the design

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for high precision collecting weak signal and circuit thereof
  • Method for high precision collecting weak signal and circuit thereof
  • Method for high precision collecting weak signal and circuit thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0022] As shown in Figure 1, described adder 101 is outputted to analog-to-digital converter 102 after the sawtooth wave or triangular wave signal output of the signal under test and sawtooth wave or triangular wave generating circuit 104 are added, and analog-to-digital converter 102 converts the signal into After the digital signal is processed by the microprocessor 103, a high-precision digital signal can be obtained.

[0023] Suppose the detected signal ( figure 2 The dotted line in ) is less than a quantization level of the analog-to-digital converter (the level corresponding to 1 LSB, figure 2 The thin solid line in), under normal circumstances, the analog-to-digital converter cannot distinguish such a measured signal, but if there is a sawtooth wave with an amplitude equal to the quantization level superimposed, the analog-to-digital converter will be able to...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a high accuracy weak signal collecting method and circuit, adding a to-be-detected signal to a sawtooth or triangular waveform signal and making high speed sampling in the period of the sawtooth or triangular waveform signal, able to implement detecting a signal lower than quantized level of an A / D converter and the detecting accuracy can be higher than resolution of the used A / D converter.

Description

technical field [0001] The invention relates to electronic circuits, in particular to a data acquisition circuit capable of measuring low-frequency signals with high precision. Background technique [0002] High-precision data acquisition plays an extremely important role in various industrial measurement and control systems, instrumentation and scientific research. There are many people who have studied various data acquisition systems: for example, invention patents designed by Wang Lixin (a high-speed and large-capacity data acquisition system based on CPLD and SDRAM, application number CN200410043813.5) and invention patents designed by Wang Guyin (multiple channel high-speed data acquisition device, application number CN89106196.7), etc., but the above-mentioned design can only obtain the precision of the analog-to-digital converter (Analog Digital Convertor, ADC) adopted in the design. Contents of the invention [0003] The technical problem to be solved by the pres...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G08C19/16
Inventor 林凌李刚
Owner TIANJIN UNIV