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Signal sampling system and method

A signal sampling and signal technology, applied in general control systems, control/regulation systems, instruments, etc., can solve the problems of sensor range limitation, collected signal error, etc., and achieve the effect of improving measurement accuracy

Inactive Publication Date: 2015-02-25
INST OF NEW ENERGY SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a signal sampling system and method to solve the problem in the prior art that errors occur in the collected signal due to the limitation of the range of the sensor itself when the size of the collected signal changes.

Method used

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Embodiment 1

[0021] figure 1 A structural block diagram of the signal sampling system provided by the first embodiment of the present invention is shown, and the details are as follows:

[0022] The signal sampling system described in the embodiment of the present invention includes a plurality of sensors 101 of different ranges for converting the collected signals into corresponding analog electrical signals, and a plurality of sampling circuits corresponding to the ranges of the sensors 102, and a controller 103 for selecting and outputting a sensor of a corresponding range as a sampling output according to the magnitude of the collected signal value, wherein:

[0023] The input terminals of the plurality of sensors 101 detect the collected signals;

[0024] The output terminal of the sensor 101 is connected to the input terminal of the sampling circuit 102, and the sampling frequency of the sampling circuit 102 corresponds to the measuring range of the sensor 101;

[0025] The output ...

Embodiment 2

[0046] image 3 The implementation flow of the signal sampling method provided by the second embodiment of the present invention is shown, and the details are as follows:

[0047] The signal sampling method described in the embodiment of the present invention is the signal sampling system described in Embodiment 1, and the method includes:

[0048] In step S301, the measuring range of the sensor to which the signal value of the collected signal belongs is obtained.

[0049] Specifically, the range range of the sensor to which the signal value of the collected signal belongs is acquired, wherein the range range may be a separate range interval, such as for two sensors with ranges [A, B] and [B, C], which The range interval can be directly used to find the range range of the collected signal. When the ranges of the two sensors are [0,A] and [0,B] and A>B, it can be divided into [0,A]. [A,B] two intervals.

[0050] Likewise, the sensor in the embodiment of the present inventio...

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Abstract

The invention belongs to the field of signal sampling and provides a signal sampling method and system. The signal sampling system comprises multiple sensors, multiple sampling circuits and a controller, wherein the measuring ranges of the multiple sensors are different, the multiple sensors are used for converting acquired signals into corresponding analog electric signals, the sampling frequencies of the sampling circuits correspond to the measuring ranges of the sensors, the controller is used for selecting one sensor with the corresponding measuring range according to the value of a certain acquired signal to be used for sampling output, the acquired signals are detected by the input ends of the multiple sensors, the output ends of the sensors are connected with the input ends of the sampling circuits, the sampling frequencies of the sampling circuits correspond to the measuring ranges of the sensors, and the output ends of the sampling circuits are connected with the controller. The signal sampling method and system can be adapted to acquired signals with different degrees of intensity, the corresponding sensors and the corresponding sampling frequencies are adopted according to the acquired signals with different degrees of intensity, and thus a measurement value with higher precision can be obtained.

Description

technical field [0001] The invention belongs to the field of signal sampling, in particular to a signal sampling system and method. Background technique [0002] In the case of the photovoltaic grid-connected inverter controlling the AC output current or other control of the output current, it is necessary to collect the output current value, and use the collected current value as the feedback signal of the current control. The current controller or current The adjustment circuit adjusts the magnitude of the output current correspondingly according to the collected current feedback signal. [0003] At present, the current value is collected by using a current sensor to collect an induction signal corresponding to the magnitude of the current value, and sampling the induction signal through an AD sampling circuit to obtain a sampled current value. After the sampled current value is compared by the processor, a corresponding control command is sent to realize the adjustment o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/042
CPCG05B19/042
Inventor 劳长石
Owner INST OF NEW ENERGY SHENZHEN