A new flame detector with one ultraviolet and two infrared detectors is designed. The ultraviolet detector is of rapid response(≤10 μs) while the two infrared detectors usually have a response time of more than 5 ms...A new flame detector with one ultraviolet and two infrared detectors is designed. The ultraviolet detector is of rapid response(≤10 μs) while the two infrared detectors usually have a response time of more than 5 ms. The ultraviolet detector is applied to deal with the flame of large scales. When facing the flame of mid or small scales, the three detectors cooperate. Employing the high-order derivatives of the sample data of the infrared circuits to improve the sensitivity, the response speed is greatly improved. The data of the temperature sensor is used to adjust circuit parameters in real time, thus reducing the effect of temperature drift. The flame detectors are tested at different distances and the response time is as rapid as 0.65 ms. The test results show that the new flame detector has the characteristics of high speed and a low rate of false alarms.展开更多
油水界面监测是保证储卸油顺利进行,油水置换工艺安全可靠的关键。针对一种新型的深水立柱式Spar钻井生产储卸油平台(spar drilling production storage offloading,简称SDPSO)的特点,在综述储油舱液面监测方法及1:40模型试验液面监测...油水界面监测是保证储卸油顺利进行,油水置换工艺安全可靠的关键。针对一种新型的深水立柱式Spar钻井生产储卸油平台(spar drilling production storage offloading,简称SDPSO)的特点,在综述储油舱液面监测方法及1:40模型试验液面监测方法基础上,对其进行油水界面监测方案研究。使用连续监测与高位/低位警报位置监测相结合的方式是适宜的,考虑到实际应用时的系统安全,对连续监测及高位/低位报警监测须至少设置两种独立的监测方式:连续监测采用流量计及压差法监测,高位/低位警报位置监测采用射线法、电容式方法、振棒物位开关监测。另外考虑到监测系统的可靠性,对每种检测装置需设置备用的监测回路。展开更多
基金Project of Special Zone for National Defense Science and Technology Innovation(No.Y7GW04C001)
文摘A new flame detector with one ultraviolet and two infrared detectors is designed. The ultraviolet detector is of rapid response(≤10 μs) while the two infrared detectors usually have a response time of more than 5 ms. The ultraviolet detector is applied to deal with the flame of large scales. When facing the flame of mid or small scales, the three detectors cooperate. Employing the high-order derivatives of the sample data of the infrared circuits to improve the sensitivity, the response speed is greatly improved. The data of the temperature sensor is used to adjust circuit parameters in real time, thus reducing the effect of temperature drift. The flame detectors are tested at different distances and the response time is as rapid as 0.65 ms. The test results show that the new flame detector has the characteristics of high speed and a low rate of false alarms.
文摘油水界面监测是保证储卸油顺利进行,油水置换工艺安全可靠的关键。针对一种新型的深水立柱式Spar钻井生产储卸油平台(spar drilling production storage offloading,简称SDPSO)的特点,在综述储油舱液面监测方法及1:40模型试验液面监测方法基础上,对其进行油水界面监测方案研究。使用连续监测与高位/低位警报位置监测相结合的方式是适宜的,考虑到实际应用时的系统安全,对连续监测及高位/低位报警监测须至少设置两种独立的监测方式:连续监测采用流量计及压差法监测,高位/低位警报位置监测采用射线法、电容式方法、振棒物位开关监测。另外考虑到监测系统的可靠性,对每种检测装置需设置备用的监测回路。
