Author: Huang Lin

Source: "Science 24 hours" in 2015 the first five pages 38-40, a total of three

Abstract: Existing single stretcher shape and can not be changed. Due to the need stretcher places often poor road conditions, the use of a stretcher will bring great inconvenience, and even the wounded on stretchers would bring more damage. Therefore, we think it should invent a suitable balance stretcher rugged road use, better protection of the wounded.

Access to such information through the Internet, go to the hospital visit, after consulting experts and other ways to carry out investigation, we found that, although the existing rescue stretcher can be folded, but do not have the balance function (Figure 1). In order to better design, we find several more typical stretcher designed for use as a reference.

The stretcher (Figure 2) field for the wounded in case of non-road ambulance. It works through the gyroscope to detect gravitational stretcher verticality signal and transmits the microcontroller, generates a pulse signal through the microcontroller to drive the servo motor, and finally by the servo motor to adjust the angle to control the front stretcher, back, left and right directions s level.

The traditional stretcher to carry at least two health care workers, and to cope with stairs or ramps will be some strenuous. The stretcher (Figure 3) uses a similar caterpillar bent piece design, just to mention medical stretcher live one, it will automatically shrink from the stretcher, wounded and stretcher between a certain barrier. If at the same time with the wheels at the bottom, even escort the wounded tasks can be completed by one person, saving manpower.

In order to provide a suitable stretcher rugged road use, to ensure that the wounded lay on stretchers always in a horizontal state, we have adopted the principle of a parallelogram and an isosceles triangle in the bit line is high mathematical knowledge to design, make Stretcher can automatically adjust the balance center of gravity changes and changes in the human terrain.

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