PWM circuit duty ratio adjustment method and system for blood pressure measuring device

A technology of blood pressure measurement device and PWM circuit, which is applied in the electronic field, can solve the problems affecting the adjustment effect of the duty ratio, and achieve the effects of reducing the influence, improving accuracy, and high adjustment effect

Active Publication Date: 2018-11-27
GUANGZHOU SHIYUAN ELECTRONICS CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a PWM circuit duty ratio adjustment method and system for a blood pressure measurement device in view of the technical problem that the traditional scheme easily affects the duty ratio adjustment effect.

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  • PWM circuit duty ratio adjustment method and system for blood pressure measuring device
  • PWM circuit duty ratio adjustment method and system for blood pressure measuring device
  • PWM circuit duty ratio adjustment method and system for blood pressure measuring device

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Embodiment Construction

[0060] The specific implementation of the PWM circuit duty ratio adjustment method and system of the blood pressure measuring device of the present invention will be described in detail below with reference to the accompanying drawings.

[0061] refer to figure 1 , figure 1 Shown is a flow chart of a PWM circuit duty ratio adjustment method of a blood pressure measuring device in one embodiment, including the following steps:

[0062] S10, when the blood pressure measuring device is working, obtain the real-time air pressure in the cuff;

[0063] The above-mentioned blood pressure measurement device may generally include an air pump, a pressure sensor, a cuff and a controller, etc., and the above-mentioned air pump may be controlled by a PWM circuit to control parameters such as cuff inflation volume or inflation speed, and the above-mentioned pressure sensor may be Measure the real-time air pressure in the cuff, and send the real-time air pressure to the controller, so that...

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Abstract

A PWM circuit duty ratio adjustment method and system for a blood pressure measurement apparatus. The PWM circuit duty ratio adjustment method for a blood pressure measurement apparatus comprises the following steps: when a blood pressure measurement apparatus is used, acquiring a real-time atmospheric pressure in a cuff (S10); calculating a duty ratio of a PWM circuit in the blood pressure measurement apparatus according to the real-time atmospheric pressure and a duty ratio-atmospheric pressure relation model (S20), wherein the duty ratio-atmospheric pressure relation model represents a functional relation between the duty ratio and the atmospheric pressure when a rising velocity of the atmospheric pressure in the cuff is constant; and adjusting a working duty ratio of the PWM circuit according to the duty ratio (S30). The PWM circuit duty ratio adjustment method and system for a blood pressure measurement apparatus are applicable to various kinds or types of blood pressure measurement apparatuses, have a relatively high adjustment effect, and ensure the working stability of a PWM circuit.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a method and system for adjusting the duty cycle of a PWM circuit of a blood pressure measuring device. Background technique [0002] In blood pressure measuring devices such as rising method electronic sphygmomanometer measurement, in order to improve the accuracy and stability of measurement, it is usually necessary to keep the rising speed of the air pressure in the cuff of the blood pressure measuring device constant. The constant pressurization speed can reduce the interference of the air pump on the measurement results and obtain a relatively stable signal. In order to achieve constant speed pressurization, the control of the air pump is particularly important. The drive of the air pump generally adopts a PWM circuit, and the inflating power of the air pump can be adjusted by adjusting the duty cycle of the PWM to achieve a constant acceleration of the air pressure in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K3/017A61B5/022
CPCH03K3/017A61B5/022
Inventor 高平东郑洪涛李世兴李国春李艳峰
Owner GUANGZHOU SHIYUAN ELECTRONICS CO LTD
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