The Design of Electronic Monitor Used in Hospital

An electronic monitor for hospital inpatients is designed in this paper. Patients can give a calling signal by button, and the monitor can detect and display the infusion speed and give a alarm in time when the speed is too fast or too slow, in addition, it also can set various time for activity to inform medical staff. The whole system is divided into the host and the extension, the host display the current time and set various time for activities by DS1302 chip, the extension give the calling signal by keyboard, the host receive it through communication and display the bed number, the infusion speed is detected through the photoelectric method and is send to the extension for display and alarm. The monitoring instrument has great application value which can avoid failure during the process of transfusion and improve working efficiency.

Designing of Velocity Measuring System of Initiating Explosive Devices Based on Photoelectric Method

This paper introduced a new method of designing on the velocity measuring system of initiating explosive devices. We designed multiple selectable targets using the principle of photoelectric conversion. When the object passed through the targets, two pulses would generate separately. Through counting the spacing interval of the two pulses, we could calculate the mean velocity of the object passing through the targets, and revise it into the muzzle velocity. This paper designed the structure of photoelectric targets and circuits of the measuring system, also processed revising and error analysis of the measurement result. The system designed in this paper has the features of simple, reliable, high accuracy, good dynamic response, easy to disassemble and maintain, and is suitable for various environment with the reducing of the errors and inconvenience of traditional velocity measurements.