Development of residual voltage testing equipment / 中国医疗器械杂志
Chinese Journal of Medical Instrumentation
;
(6): 261-286, 2014.
Article
in Chinese
| WPRIM
| ID: wpr-259876
ABSTRACT
For the existing measurement methods of residual voltage which can't turn the power off at peak voltage exactly and simultaneously display waveforms, a new residual voltage detection method is put forward in this paper. First, the zero point of the power supply is detected with zero cross detection circuit and is inputted to a single-chip microcomputer in the form of pulse signal. Secend, when the zero point delays to the peak voltage, the single-chip microcomputer sends control signal to power off the relay. At last, the waveform of the residual voltage is displayed on a principal computer or oscilloscope. The experimental results show that the device designed in this paper can turn the power off at peak voltage and is able to accurately display the voltage waveform immediately after power off and the standard deviation of the residual voltage is less than 0.2 V at exactly one second and later.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Electric Power Supplies
/
Signal Processing, Computer-Assisted
/
Microcomputers
/
Equipment Design
Language:
Chinese
Journal:
Chinese Journal of Medical Instrumentation
Year:
2014
Type:
Article
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