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我矿二坑电工组在矿领导的倡议和支持下,为克服过去采用绝缘铁道作路轨信号发生器及踏板开关自动控制电动风门因铁道漏电以致失灵的缺点,根据半导体管体积小,重量轻,使用寿命长,安全可靠,不需预热,没有电子管和光导管的热惰性,且电压低,灵敏度高等优点,提出了光电自动风门的设计方案。经过试验研究,于一九七三年元月在473中段西部通风系统安装使用。半
In order to overcome the shortcomings that the insulated electric rail used as rail signal generator and pedal switch to automatically control the electric air damper due to railway leakage during the mine’s initiative and support by mine leadership, according to the small size and light weight of the semiconductor tube, Long service life, safe and reliable, without preheating, no thermal inertness of electron tube and light guide, low voltage and high sensitivity, a design scheme of a photoelectric automatic air door is proposed. After the pilot study, it was installed and used in the western ventilation system in mid-473 in January 1973. half