Electric breast pump with pressure feedback control based on flexible pressure sensor

Abstract

The invention relates to an electric breast pump for pressure feedback control based on a flexible pressure sensor. The electric breast pump comprises a breast pump shield, a main body, an air suction tube, a vacuum pump and a control host, and further comprises a piezoelectric film sensor and a feedback unit, wherein the breast pump shield is connected to the main body; the main body is connected to the vacuum pump by virtue of the air suction tube; the vacuum pump is arranged inside the control host; a receiving container is connected to the lower end of the main body; the piezoelectric film sensor is arranged on the inner side of the breast pump shield; the feedback unit is arranged inside the control host; the piezoelectric film sensor is connected to the feedback unit; the piezoelectric film sensor is used for detecting negative pressure born by surface tissues of breasts and for transmitting the negative pressure to the feedback unit; and the feedback unit is used for controlling suction force of the vacuum pump according to feedback information. Compared with the prior art, the electric breast pump disclosed by the invention can monitor pressure on the breasts of a breast pump user in real time and can dynamically regulate the vacuum suction force of the breast pump, so as to avoid breast injury caused by the excessive vacuum suction force and to protect the healthy breasts of the user.

Description

technical field [0001] The invention relates to an electric breast pump, in particular to an electric breast pump for pressure feedback control based on a flexible pressure sensor. Background technique [0002] Breastfeeding is an internationally recognized healthy way of breastfeeding. Pregnant women are generally working women with limited breastfeeding time. After deciding to breastfeed, they need to use professional equipment to express and store breast milk. At present, internationally renowned breast pump manufacturers include Medela, Philips, etc. The breast pumps produced by them are divided into electric type and manual type. For electric breast pumps, open-loop control is used. In the stage of stimulating lactation, a microcontroller is used to control high-frequency PWM waves, so that the negative pressure of the vacuum pump changes at a high frequency and small amplitude; The PWM wave makes the negative pressure change frequency of the vacuum pump low and the am...

AI Technical Summary

Problems solved by technology

By selecting a stepping motor and setting a negative pressure adjustment mechanism, a stable negative pressure can be generated, and the frequency of the piston is controlled by the stepping motor, which is closer to the baby's sucking frequency and improves the comfort of breastfeeding; the pressure display mechanism can make the user more intuitive Adjust the size of the negative pressure, but the above-mentioned feedback device uses a step-in cylinder to adjust the suction of the cylinder, resulting in a less sensitive response and poor accuracy. In addition, the structure of the patented electric breast pump is more complicated

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