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A PWM circuit duty ratio adjustment method, controller and blood pressure measuring device

A technology of PWM circuit and duty ratio, which is applied in the electronic field, can solve the problem that the adjustment method cannot adapt to the driving voltage, etc.

Active Publication Date: 2020-05-05
GUANGZHOU SHIYUAN ELECTRONICS CO LTD +1
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  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the application provides a PWM circuit duty ratio adjustment method, controller and blood pressure measurement device to solve the problem that the existing adjustment method cannot adapt to a wider driving voltage

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  • A PWM circuit duty ratio adjustment method, controller and blood pressure measuring device
  • A PWM circuit duty ratio adjustment method, controller and blood pressure measuring device
  • A PWM circuit duty ratio adjustment method, controller and blood pressure measuring device

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Embodiment Construction

[0066] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present application as recited in the appended claims.

[0067] The terminology used in this application is for the purpose of describing particular embodiments only, and is not intended to limit the application. As used in this application and the appended claims, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the term...

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Abstract

The invention provides a PWM circuit duty ratio adjusting method, a controller and a blood pressure measurement device. The PWM circuit duty ratio adjusting method comprises the steps that when the blood pressure measurement device works, and air pressure in a cuff and driving voltage of an air pump are obtained in real time; when the air pressure in the cuff exceeds a first preset value for the first time, a first coefficient in a function relation between driving energy and the air pressure is calculated; after the voltage in the cuff exceeds the first preset value, on the basis of the calculated first coefficient, driving energy of the present time is determined according to the air pressure of the present time and the function relation between the driving energy and the air pressure; the driving duty ratio of the present time is determined according to the determined driving energy and the driving voltage of the present time, and a PWM circuit is indicated to generate a PWM signalwith the duty ratio equal to the driving duty. The PWM circuit duty ratio adjusting method, the controller and the blood pressure measurement device can adapt to wider driving voltage.

Description

technical field [0001] The present application relates to the field of electronic technology, and in particular to a method for adjusting the duty ratio of a PWM circuit, a controller and a blood pressure measuring device. Background technique [0002] When the blood pressure measuring device is working, when the air pressure in the cuff of the blood pressure measuring device is greater than the normal blood pressure (20mmHg) of the human body, in order to improve the accuracy of the measurement results, it is usually necessary to keep the increase rate of the air pressure in the cuff constant. In order to achieve constant speed pressurization, the control of the air pump is particularly important. The driving circuit of the air pump generally adopts a pulse width modulation (PulseWidth Modulation, PWM) circuit, and the pumping power of the air pump can be adjusted by adjusting the duty cycle of the PWM signal to achieve constant speed. Pressurize quickly. [0003] The exis...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/0225A61B5/021
Inventor 高平东
Owner GUANGZHOU SHIYUAN ELECTRONICS CO LTD
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