抄録
A new type pneumatic delay element was developed to realize high reproducibility and high accuracy. The reproducibility is calculated to be better than ±0.025% of delay time, comparing with restrictor and constant volume capacitor combination of ±5 to 7% error. The error of ±0.08 to 0.14% was realized for 1 to 3s delay with 47cm3 and 97.5cm3 chambers.
The elements are designed to combine a chamber with films and a back pressure sensor. A film is installed to make a similar shape to the chamber. One side of the chamber is divided by a flat film with bleed holes. The film approached to the sensor after predetermined time, and delayed signal is emitted. Input signals generated by a solenoid operated valve give higher accuracy that by fluidic devices. Static and dynamic characteristics affecting the accuracy are investigated.
