Cheng-Sheng Chang

Title: Cheng-Sheng Chang: Innovator in Dust Sampling Technology

Introduction

Cheng-Sheng Chang is a notable inventor based in Hsinchu, Taiwan. He has made significant contributions to the field of occupational safety through his innovative designs. His work primarily focuses on improving dust sampling techniques, which are crucial for ensuring workplace safety.

Latest Patents

Cheng-Sheng Chang holds a patent for a three-stage dust sampler. This device utilizes a porous foam as the impactor substrates. The sampler features an annular inlet that conforms to ISO/CEN/ACGIH inhalable sampling criteria. It includes two impactor stages designed to classify thoracic and respirable particles, along with a final filter to collect respirable particles after the impactors. The collection efficiency curves for thoracic and respirable dust meet ISO/CEN/ACGIH criteria when the jet-to-plate distance is set at 1.0. The cut-off aerodynamic diameters are 9.6 and 4.0 micrometers for the first and second impactor stages, respectively. Notably, the collection efficiencies for solid particles are equal to those for liquid particles, indicating that there is no solid particle bouncing from the foam substrates.

Career Highlights

Cheng-Sheng Chang is affiliated with the Institute of Occupational Safety and Health, Council of Labor Affairs. His work at this institution has allowed him to focus on developing technologies that enhance workplace safety and health standards.

Collaborations

Cheng-Sheng has collaborated with notable colleagues, including Tung-Sheng Shih and Da-Toung Tang. Their combined expertise contributes to the advancement of safety technologies in occupational settings.

Conclusion

Cheng-Sheng Chang's innovative contributions to dust sampling technology reflect his commitment to improving occupational safety. His patent for the three-stage dust sampler exemplifies the importance of effective dust management in the workplace.