fig5

Figure 5. (A) Diagram of an automobile engine model; (B) Model engine diagram of pasted PAN/Zr(OAc)₄ composite nanofiber membrane sensor and (C) local magnification sensor output interface temperature display; (D) Pyroelectric output of 450 °C heat-treated PAN/Zr(OAc)₄ membrane sensor for different heat source temperature gradients (ΔT = 100, 200, 300, 400, 500 K); (E) Fitted curve of pyroelectric output voltage as a function of temperature gradient; (F) Local temperature normal and (G) local temperature too high. PAN: Polyacrylonitrile; Zr(OAc)₄: zirconium acetate.