针对现有阀门泄漏检测方法多数存在信号采样频率过高、易受外界信号干扰、算法较复杂、通用性不强、难以准确及时地反映泄漏信息等问题,提出一种阀门泄漏检测装置的设计方案。采用光电传感技术对阀门泄漏检测装置的整体方案进行设计。...针对现有阀门泄漏检测方法多数存在信号采样频率过高、易受外界信号干扰、算法较复杂、通用性不强、难以准确及时地反映泄漏信息等问题,提出一种阀门泄漏检测装置的设计方案。采用光电传感技术对阀门泄漏检测装置的整体方案进行设计。根据设计要求,对其电源箱、逆变器箱、阀门泄漏检测单元进行设计,并以PLC为核心,对阀门泄漏检测箱进行优化设计。最后,搭建测试平台,对阀门泄漏检测装置进行测试。结果表明:阀门泄漏检测装置设计合理、结构科学,能够同时实现16个阀门泄漏的实时在线本地监测和远程监测,且其电源箱主备电切换响应时间为12.20 ms (满足不大于15 ms的要求)。该装置具有稳定性高、通用性强、实时性强等特点,为阀门泄漏检测的工程实际应用提供一定的参考。展开更多
A hierarchical reduced graphene oxide-MnO_(2)@polypyrrole coaxial nanotube composite hydrogel was prepared via oxidative polymerization of pyrrole in the presence of MnO_(2)nanotubes,followed by the hydrothermal treat...A hierarchical reduced graphene oxide-MnO_(2)@polypyrrole coaxial nanotube composite hydrogel was prepared via oxidative polymerization of pyrrole in the presence of MnO_(2)nanotubes,followed by the hydrothermal treatment of graphene oxide and MnO_(2)@polypyrrole coaxial nanotubes.The stable composite hydrogel with a hierarchical network was composed of one-dimensional MnO_(2)@polypyrrole coaxial nanotube and two-dimensional graphene nanosheet and characterized by scanning electron microscope,Fourier transform infrared spectroscopy,X-ray diffraction,Brunauer-Emmett-Teller surface,and X-ray photoelectron spectroscopy measurements.The composite hydrogel can be used as an efficient adsorbent for Cr(Ⅵ)removal due to the synergistic interaction between graphene and MnO_(2)@polypyrrole and the hierarchical structure of the hydrogel.Moreover,the composite hydrogel is easily separated because of its stable monolith,and it is reusable(76.8%of removal ability remaining after five adsorption-desorption cycles).The simple fabrication and cost-effective separation process together with the excellent absorption performance endow the composite hydrogel with great potential for practical wastewater treatment.展开更多
文摘针对现有阀门泄漏检测方法多数存在信号采样频率过高、易受外界信号干扰、算法较复杂、通用性不强、难以准确及时地反映泄漏信息等问题,提出一种阀门泄漏检测装置的设计方案。采用光电传感技术对阀门泄漏检测装置的整体方案进行设计。根据设计要求,对其电源箱、逆变器箱、阀门泄漏检测单元进行设计,并以PLC为核心,对阀门泄漏检测箱进行优化设计。最后,搭建测试平台,对阀门泄漏检测装置进行测试。结果表明:阀门泄漏检测装置设计合理、结构科学,能够同时实现16个阀门泄漏的实时在线本地监测和远程监测,且其电源箱主备电切换响应时间为12.20 ms (满足不大于15 ms的要求)。该装置具有稳定性高、通用性强、实时性强等特点,为阀门泄漏检测的工程实际应用提供一定的参考。
基金Funded by the Open/Innovation Fund of Hubei Three Gorges Laboratory(No.SK212002)。
文摘A hierarchical reduced graphene oxide-MnO_(2)@polypyrrole coaxial nanotube composite hydrogel was prepared via oxidative polymerization of pyrrole in the presence of MnO_(2)nanotubes,followed by the hydrothermal treatment of graphene oxide and MnO_(2)@polypyrrole coaxial nanotubes.The stable composite hydrogel with a hierarchical network was composed of one-dimensional MnO_(2)@polypyrrole coaxial nanotube and two-dimensional graphene nanosheet and characterized by scanning electron microscope,Fourier transform infrared spectroscopy,X-ray diffraction,Brunauer-Emmett-Teller surface,and X-ray photoelectron spectroscopy measurements.The composite hydrogel can be used as an efficient adsorbent for Cr(Ⅵ)removal due to the synergistic interaction between graphene and MnO_(2)@polypyrrole and the hierarchical structure of the hydrogel.Moreover,the composite hydrogel is easily separated because of its stable monolith,and it is reusable(76.8%of removal ability remaining after five adsorption-desorption cycles).The simple fabrication and cost-effective separation process together with the excellent absorption performance endow the composite hydrogel with great potential for practical wastewater treatment.
