title: [Test methods of visual alarm signal for medical alarm systems].
abstract: This paper introduces several test methods of characteristics of alarm indicator lights which can be used in the medical alarm system to verify the compliance of YY 0709-2009. These methods include the direct measurement of the pulse current supply of the alarm signals, image analysing of a video and reception by photoelectric sensor. After the comparation of the advantages and disadvantages among these methods, this paper proposes a new method of signal reception. This method which used a silicon photocell as the sensor with light filter in its front, and amplified circuit in the output end then used an oscillograph as the reviewer, has resolved the testing difficulties of the flashing signal simulating by LCD, and can be applied to test the alarm indicator lights in any medical electrical equipment.
authors.forename: Yun
authors.initials: Y
authors.lastname: Zhang
authors.forename: Yiding
authors.initials: Y
authors.lastname: Sun
mesh_terms: D056902:Clinical Alarms; D004867:Equipment Design; D012815:Signal Processing, Computer-Assisted