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Software filtering method for displaying waveform

A software filtering and waveform display technology, applied in the field of medical devices, to achieve the effect of keeping waveforms undistorted, improving reliability, and improving accuracy and stability

Active Publication Date: 2013-07-03
BEIJING AEONMED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the costs, hidden dangers and delays caused by hardware filtering, the present invention provides a software filtering method for displaying waveforms

Method used

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Embodiment Construction

[0019] In order to describe the technical content, structural features, achieved goals and effects of the present invention in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.

[0020] This embodiment only takes the AD conversion of the 10-bit precision MCU and the filtering of pressure data as examples. attached figure 1 It is a flow chart of a filtering method for displaying waveforms in an embodiment of the present invention. As shown in the figure, firstly, the data collected by the MCU is converted by ADC (i.e., an analog / digital converter), and the converted data is converted according to the actual pressure value Calculate the corresponding relationship with the AD value, and then get the actual pressure value.

[0021] Set up a cache. According to the resolution of the LCD screen, the length of the curve displayed on the LCD screen and the system clock, the number of displayable points in the abscissa ca...

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Abstract

The invention discloses a software filtering method for displaying the waveform. The software filtering method comprises the following steps: S1, acquiring data by using an MCU (Micro Control Unit) and carrying out ADC (Analog To Digital Converter) conversion on the acquired data; S2, calculating the converted data according to the corresponding relation between actual pressure values and an AD (Analog To Digital) value to obtain the actual pressure values and storing the actual pressure values into a cache; S3, counting the quantity of the pressure values of the cache and calculating to solve an average pressure value P; S4, calculating the display height H of the pressure values on a liquid crystal screen according to the average pressure value and the actual pressure value corresponding to each point; and S5, calculating to obtain the curve height which is actually outputted and displayed. According to the software filtering method disclosed by the invention, a pressure curve is better filtered; stray waves are effectively filtered on the basis of meeting the real-time property; distorting phenomena of graphic curves such as delay are avoided; in addition, the accuracy and the stability of waveform display are improved; and meanwhile, the distortionless of the waveform is better maintained and the reliability of the system is improved.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to a software filtering method for displaying waveforms. Background technique [0002] In current medical equipment such as ventilator, anesthesia machine, etc., in order to make the user interface clearer and easier to read, relevant important monitoring data are increasingly displayed in graphics. In the prior art, there are many algorithms for accurate calculation and output of graphics and curves. However, for the special requirements of medical equipment safety, stability and real-time, most of the relevant algorithms use expensive advanced boards, or common MCU (Micro Control Unit, the Chinese name is the micro control unit, also known as the single-chip microcomputer), the method of using the hardware AD conversion directly through simple filtering, if it still fails to meet the requirements, it is necessary to filter the relevant hardware circuits in advance, in order to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 刘建军
Owner BEIJING AEONMED