The Institute of Applied Chemistry, an affiliate of the Chinese Academy of Sciences, started in 2001 to work on soft sensing membranes and associated dynamic cardiograph monitoring instrument, a major project initiated by the Chinese Ministry of Science and Technology. Scientists, through their more than 2 years' efforts, have worked out solutions to a range of key technologies, including synchronous stretching and corona polarization, orderly crystal forming orientation, and crystal form conversion. Scientists successfully produced, using functional merits of PVDF materials, soft piezoelectric sensing membranes that are able to collect very weak murmurs of human heart. They also designed the new manufacturing techniques and realized the consecutive production of the new membranes, a key component of the cardiograph instrument.

Researchers also realized the synchronous monitoring of cardiograph and heart murmurs, using simulator circuit, intelligent elements and USB interfaces. As a result, a dynamic instrument able to monitor cardiograph and heart murmurs with a greatly enhanced speed was born.

The new instrument has been used in hospitals on a trial basis. The preliminary testing results show that the instrument is able to monitor both cardiograph and heart murmurs when needed, possessing numerous merits, including no twisted signals, accurate and reliable testing data, fast speed, simplified operation and easy for carrying. The new instrument provides accurate and reliable data for cardiac muscle diseases examinations.