A method and device for adaptive sampling of analog signals

An adaptive sampling, analog signal technology, applied in the field of signal processing, can solve the problems of increasing system maintenance cost, occupying system power consumption, reducing system working time, etc.

Active Publication Date: 2020-10-23
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In wireless data acquisition devices that focus on power consumption, collecting and transmitting unnecessary sampling data will occupy most of the system power consumption, reduce system working time, and increase system maintenance costs (battery replacement, etc.)

Method used

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  • A method and device for adaptive sampling of analog signals
  • A method and device for adaptive sampling of analog signals
  • A method and device for adaptive sampling of analog signals

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Embodiment Construction

[0057]Reference will now be made in detail to the exemplary embodiments which are exemplified in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings indicate the same or similar elements unless otherwise stated. The implementations described in the following exemplary embodiments are not meant to correspond to all implementations of the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present disclosure as recited in the appended claims.

[0058] figure 1 It is a flow chart of an analog signal adaptive sampling method according to an exemplary embodiment. Such as figure 1 As shown, the method may include:

[0059] Step 100, collect the analog signal output by the sensor, and perform signal conditioning, so that the signal amplitude is within the measurement range; the sensor is a sensor that outputs an analog signal;

[0060] The...

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Abstract

The invention discloses a method and a device for self-adaptive sampling of an analog signal. The method comprises the steps of: acquiring analog signals output by a sensor, and performing signal conditioning; determining a digital quantity obtained by sampling of the analog signals under a designated analog-to-digital conversion frequency and an acquisition timestamp; determining a threshold value for analog-to-digital conversion frequency adjustment of acquired signals; determining difference degrees between the currently acquired signal and the signals acquired at a plurality of previous sampling moments; and determining a new sampling frequency according to the determined difference degrees, the analog-to-digital conversion frequency at the moment, and the threshold value of the analog-to-digital conversion frequency adjustment. Through adoption of the method and the device of the invention, a sampling rate of a data acquisition device is dynamically adjusted according to a relative variation ratio of sampling data, and a sampling frequency is iteratively adjusted on the condition of not measuring the sampling frequency, therefore, accuracy of sampling is ensured, and unnecessary sampling data is reduced.

Description

technical field [0001] The invention relates to the field of signal processing, in particular to an analog signal self-adaptive sampling method and device. Background technique [0002] In industrial production and testing sites, it is often necessary to use various types of sensors that output analog signals to monitor various parameters and indicators in the production process. For example, in automobile brake experiments, temperature sensors, pressure sensors, pedal force sensors, displacement sensors and other sensors are widely used. Since the frequency of the sensor signal cannot be determined, traditional data acquisition devices generally use twice the estimated maximum signal frequency for sampling. However, under normal working conditions, the frequency of the sensor signal is far lower than the estimated maximum signal frequency, and most of the sampled data is unnecessary. In wireless data acquisition devices that focus on power consumption, collecting and tran...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R19/25H03M1/12
CPCG01R19/2509H03M1/1245
Inventor 贺诗波徐帅陈积明史治国李传武陈亮
Owner ZHEJIANG UNIV
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