Innovative Design of Applying TRIZ Technology to Safety Control of Low-Cost Electric Rolling Door

Abstract

The electric rolling doors are extensively used in Taiwan; however, the accidents of personal injuries caused by electric rolling doors frequently occur. The doors have caused injuries, and even casualties in worst cases. Based on TRIZ contradiction matrix and inventive principles, this study used a laser module, a photoresistor receiver, and mirror reflected refraction to construct a low-cost safety control circuit device. This safety control circuit device can be used for electric rolling doors (3m high and 8m wide) that are commonly used for residential houses. When the electric rolling door is in operation, any objects of the height over 10cm entering or existing in the range of the electric rolling door can be detected by the control device. The actuation of the electric rolling door is then stopped, and an alarm gives out warning sound, so that possible injuries may be prevented. The material cost of this control device is below 2,000 NTD, and this design is cost-effective.