Development Of Portable Automatical Transfer Facility For Human Body

Portable intellective transfer facility replaces the ordinary gravity transfusion by using the mini-electromotor, so it can accurately control the speed and quantity of the transfusion. By supervising the transfusion process, when abnormal cases happened, such as a pipeline jam or danger air bubbles, it can rapidly shut down transfusion way automatically in order to prevent the accidents caused by transfusion. The facility could stop automatically when the transfusion end up and reminds patient or paramedic by sound and lamplight. With its feature such as convenient tote, easy operation and so on, portable intellective transfer facility can improve security, accuracy and efficiency, alleviate work intensity of paramedic in the case of accurate transfusion, battlefield rescue, emergency and so on. It's a medical treatment equipment of high capability but low price.This thesis chooses a discal peristaltic pump and put forward amelioration schemes based on analysis of trait of transfer pump in common use presently and selects stepper motor as drive motor. In order to reduce the whole volume, the PCB board integrates stepper motor drive circuit, keyset, alarm circuit and LCD. Hardware circuit adopts C8051F005 singlechip as key part, and uses integrated monolithic chip L297 and L298 to realize chopper drive of stepper motor. And achieves the control of the transfusion rate and quantum through controlling the rotate speed and number of the step motor by keyset. The rubber joint between stepper motor and transfer pump can minish pulsation caused by the shake of the motor when transfusing.On the basis of analysis of characteristic of common air detector, in allusion to specific request of air bubble monitoring in the transfusion pipe, the thesis selects ultrasonic air detector to monitor air bubbles, then analyzes and reasons its feasibility in theory. The design of structure of ultrasonic transducer and circuit for signal disposing can realize dual air bubbles monitoring function.Users can set parameters of the transfer facility conveniently by keyset and LCD. The power monitoring, alarm system and hint functions enhance the reliability and security of the system. The function of temperature compensation eases the discomfort of patients brought by too low temperature of liquid...