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61. 发明授权

US5601763A In situ pipeline rehabilitation system 失效
标题翻译：原位管道修复系统
公开(公告)号：US5601763A
公开(公告)日：1997-02-11
申请号：US345996
申请日：1994-11-29
申请人： Robert M. Hunter , Frank M. Stewart , William H. Hunter
发明人： Robert M. Hunter , Frank M. Stewart , William H. Hunter
IPC分类号： B29C47/02 , B29C63/34 , B29C47/06
CPC分类号： B29C47/022 , B29C47/0023 , B29C63/34 , Y10S264/65 , Y10S425/039
摘要： Underground pipelines that carry wastewater, water, natural gas, and industrial fluids deteriorate with age. This invention is a process and apparatus for installing a thermoplastic liner in a dry pipeline to accomplish in situ rehabilitation. It involves extruding a tube of thermoplastic liner material within the interior of a dried and preheated pipeline in situ, said tube having an outside diameter smaller than the inside diameter of said pipeline. The tube is next expanded so that the outside diameter of said tube is substantially equal to the inside diameter of said pipeline. The expanded tube is then cooled and hardened in a liner configuration.
摘要翻译：携带废水，水，天然气和工业液体的地下管线随着年龄的恶化而下降。本发明是用于在干燥管道中安装热塑性衬垫以完成原位康复的方法和装置。它涉及在原位干燥和预热的管道的内部挤出一管热塑性衬垫材料，所述管的外径小于所述管道的内径。接下来扩管管，使得管的外径基本上等于所述管道的内径。然后将膨胀的管子以衬套构型冷却和硬化。

62. 发明授权

US5608171A Distributed, unattended wastewater monitoring system 失效
标题翻译：分布式无人值守废水监测系统
公开(公告)号：US5608171A
公开(公告)日：1997-03-04
申请号：US360300
申请日：1994-12-21
申请人： Robert M. Hunter , Frank M. Stewart
发明人： Robert M. Hunter , Frank M. Stewart
IPC分类号： G01F1/36 , G01F1/44 , G01F23/16 , G01N1/10 , G01N9/28 , G01N35/00
CPC分类号： G01N35/00871 , G01F1/363 , G01F1/44 , G01F23/168 , G01N1/10 , G01N35/00732 , G01N9/28 , G01N2001/1043 , G01N2035/00782 , G01N2035/00881
摘要： A distributed, unattended wastewater monitoring system that uses advances in low-energy signal processing and distributed microelectromechanical systems and that involves wireless interrogation of distributed, low-power, normally-off sensors. In a preferred embodiment, a plurality of flowmeter stations and at least one rain gauge station are networked through a base station for storm water discharge of infiltration-inflow monitoring. Wireless transceivers are used to transmit radio signals into and out of a sewer manhole.
摘要翻译：分布式，无人值守的废水监测系统，其使用低能量信号处理和分布式微机电系统的进步，涉及无线询问分布式，低功率，常闭传感器。在一个优选实施例中，多个流量计站和至少一个雨量计站通过基站联网，用于渗透流入监测的雨水排放。无线收发器用于将无线电信号发送到下水道人孔中。

63. 发明授权

US5406828A Method and apparatus for pressure and level transmission and sensing 失效
标题翻译：用于压力和液位传输和感测的方法和装置
公开(公告)号：US5406828A
公开(公告)日：1995-04-18
申请号：US153178
申请日：1993-11-16
申请人： Robert M. Hunter , Frank M. Stewart
发明人： Robert M. Hunter , Frank M. Stewart
IPC分类号： G01F1/36 , G01F1/44 , G01F23/16 , G01N1/10 , G01N9/28 , G01N35/00
CPC分类号： G01F1/44 , G01F1/363 , G01F23/168 , G01N1/10 , G01N35/00732 , G01N35/00871 , G01N9/28 , G01N2001/1043 , G01N2035/00782 , G01N2035/00881
摘要： This invention provides a method and apparatus for transmitting and sensing liquid pressure (head) and liquid level (depth) in flow metering, tide gauge and liquid salinity or slurry density measurement applications. The invention essentially eliminates the effect of pressure sensor temperature variations and the effect of long-term pressure sensor signal drift on pressure sensing accuracy by resetting the zero and gain of the pressure sensor prior to pressure measurement. A variety of sources of a known differential pressure may be used to reset the gain of the differential pressure sensor by simultaneously exposing both sides of the differential pressure sensor to the known differential pressure. In one embodiment of the invention, the head loss through exhaust port of a spring-biased comparitor is the known pressure differential used to reset the pressure sensor gain. In another embodiment, a U-tube manometer is used to set a known differential pressure across an adjustable differential pressure regulator or an adjustable spring-biased comparitor and that pressure differential is used. The invention provides accurate bubbler pressure measurement under conditions of rapidly varying liquid head by means of a single calibration of a differential pressure sensor instead of sequential calibrations of a gauge pressure sensor. The present invention provides a compact and lightweight manifold-mounted pneumatic integrated circuit and a method for in situ recalibration of relatively inexpensive pressure sensors.
摘要翻译：本发明提供了一种用于在流量计，潮汐计和液体盐度或浆料浓度测量应用中传输和感测液体压力（头部）和液位（深度）的方法和装置。通过在压力测量之前复位压力传感器的零点和增益，本发明基本上消除了压力传感器温度变化的影响以及长期压力传感器信号漂移对压力感测精度的影响。可以使用已知压差的各种来源，通过同时将差压传感器的两侧暴露于已知的压差来重置差压传感器的增益。在本发明的一个实施例中，通过弹簧偏置的比较器的排气口的头部损失是用于复位压力传感器增益的已知压力差。在另一个实施例中，使用U型管压力计来设置跨越可调压差调节器或可调节弹簧偏置的比较器的已知压差，并且使用压力差。本发明通过差压传感器的单次校准而不是表压式传感器的顺序校准，在快速变化的液体头的条件下提供精确的起泡器压力测量。本发明提供了一种紧凑且重量轻的歧管安装的气动集成电路和用于相对便宜的压力传感器的原位重新校准的方法。

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