公开(公告)号：US5917840A

公开(公告)日：1999-06-29

申请号：US851977

申请日：1992-03-13

Applicant: M. Charles Cheney ,  Simon Korowitz ,  William M. Slechta ,  Nathan H. Tobol

Inventor： M. Charles Cheney ,  Simon Korowitz ,  William M. Slechta ,  Nathan H. Tobol

IPC: H04L1/00 ,  G06F11/10 ,  H03M13/00

CPC classification number: H04L1/0061 ,  H04L1/0086

Abstract: A method for transmitting messages between a communications controller and devices in a factory process control system, wherein each device has an associated identification number which is unique to that device. A message to be transmitted is compiled, and then based on the criticality of the message, one of a standard, secure, or critical message protocols is chosen for the message; each protocol being defined to generate a message checksum for the message in a manner different from the other protocols. The generated checksum is then included in the message. Using the secure and critical protocols, a message checksum is generated from the message to be transmitted and the identification number of the intended recipient device. In the secure protocol, the message checksum is included in the message, but the identification number is not included in the message; in the critical protocol, both the message checksum and the identification number are included in the message. A crosstalk query message may be sent from the controller to determine if a link of a factory process control system is susceptible to crosstalk. The controller sends to a link on which a particular device is known to reside a diagnostic message indicating the identification number of the particular device and requesting any other devices that unintentionally receive the message to transmit a response message to the communications controller.

Abstract translation: 一种用于在通信控制器和工厂过程控制系统中的设备之间传送消息的方法，其中每个设备具有该设备唯一的相关联的标识号。 要发送的消息被编译，然后基于消息的关键性，为消息选择标准，安全或关键消息协议之一; 每个协议被定义为以不同于其他协议的方式为消息生成消息校验和。 生成的校验和然后包含在消息中。 使用安全和关键的协议，从要发送的消息和预期接收方设备的标识号生成消息校验和。 在安全协议中，消息中包含消息校验和，但标识号不包括在消息中; 在关键协议中，消息中包括消息校验和和标识号。 可以从控制器发送串扰查询消息，以确定工厂过程控制系统的链路是否易于串扰。 控制器发送到特定设备已知的链路，其驻留有指示特定设备的标识号的诊断消息，并且请求无意地接收消息的任何其他设备向通信控制器发送响应消息。

公开(公告)号：US5181082A

公开(公告)日：1993-01-19

申请号：US514061

申请日：1990-04-24

Applicant: Anthony C. Jeannotte ,  Anthony C. Gilby ,  M. Charles Cheney ,  Barry J. Meneghelli

Inventor： Anthony C. Jeannotte ,  Anthony C. Gilby ,  M. Charles Cheney ,  Barry J. Meneghelli

IPC: G01N21/27 ,  G01N21/05 ,  G01N21/77 ,  G01N21/83 ,  G01N21/85 ,  G01N31/16

CPC classification number: G01N21/83 ,  G01N21/8507 ,  G01N2021/054 ,  G01N2021/1744 ,  G01N2201/064 ,  G01N2201/0642 ,  G01N2201/08 ,  G01N2201/084

Abstract: Radiant energy is transmitted to a probe element including an interior conical reflecting surface and a fluid sample chamber. Portions of the light which have been transmitted, partially attenuated, or scattered by a fluid sample in the sample chamber are directed by at least a portion of the interior conical reflecting surface to means for collecting the transmitted, partially attenuated, or scattered light. A stilling valve incorporated into the probe element enables elimination of entrained gas bubbles from the chamber. A specific application of the probe is disclosed in which a titration analyzer is combined with electro-optic signal conversion and processing circuits and a probe according to the invention to provide titration colorimetric endpoint determination in measuring the free fatty acid content of a fluid such as a edible oil or fat.

Abstract translation: 辐射能量传递到包括内部锥形反射表面和流体样品室的探针元件。 通过样品室中的流体样品透射，部分衰减或散射的光的部分由内部锥形反射表面的至少一部分引导到用于收集透射的，部分衰减的或散射的光的装置。 结合到探针元件中的静止阀能够消除来自腔室的夹带的气泡。 公开了探针的具体应用，其中滴定分析仪与电光信号转换和处理电路组合，根据本发明的探针结合以提供滴定比色终点测定，以测量流体的游离脂肪酸含量，例如 食用油或脂肪。

公开(公告)号：US5576497A

公开(公告)日：1996-11-19

申请号：US437336

申请日：1995-05-09

Applicant: James H. Vignos ,  M. Charles Cheney ,  Michael G. Drainville ,  Norman O. Fonteneau ,  Joseph J. Lewicke

Inventor： James H. Vignos ,  M. Charles Cheney ,  Michael G. Drainville ,  Norman O. Fonteneau ,  Joseph J. Lewicke

IPC: G01F1/32

CPC classification number: G01F1/329

Abstract: A method and apparatus for increasing the resolution and accuracy of flow measurements made by vortex flowmeters through the use of an adaptive filter. A vortex sensor signal is conditioned by a bandpass filter whose corner frequencies are dynamically altered as a function of the measured frequency of the vortex sensor signal. When the change in frequency is relatively small, the filters' corner frequencies are set to track the frequency signal in accordance with a specified bandwidth thereby improving the signal-to-noise ratio. For large frequency changes, a new frequency signal is searched for thereby avoiding tracking erroneous noise signals. Furthermore, compensation for additional or missed vortex pulses is made thereby generating a more accurate vortex frequency measurement.

Abstract translation: 一种用于通过使用自适应滤波器来增加由涡街流量计进行的流量测量的分辨率和精度的方法和装置。 涡流传感器信号由带通滤波器调节，该带通滤波器的角频率作为涡流传感器信号的测量频率的函数动态地改变。 当频率变化相对较小时，滤波器的转角频率被设置为根据指定的带宽跟踪频率信号，从而提高信噪比。 对于大的频率变化，搜索新的频率信号，从而避免跟踪错误的噪声信号。 此外，补充额外的或错过的涡流脉冲，从而产生更准确的涡流频率测量。

公开(公告)号：US4613482A

公开(公告)日：1986-09-23

申请号：US564791

申请日：1983-12-23

Applicant: M. Charles Cheney

Inventor： M. Charles Cheney

IPC: G01N25/30 ,  G01N25/22 ,  G01N33/22

CPC classification number: G01N25/22 ,  G01N33/225

Abstract: An apparatus for determining the heating value of a fuel gas stream of variable composition utilizes a housing of high thermal conductivity defining a small volume combustion chamber, and filled with a bed of highly thermally conductive particles surrounding an electrical-resistance heater. The heater maintains the internal temperature of the chamber above the combustion point of the fuel gas, to totally combust the enclosed sample. The bed of particles transmits the heating effects of the combustion to the housing. A temperature sensor attached to the housing communicates with a feedback controller which acts to maintain the housing temperature constant, by appropriately adjusting the electrical energy supplied to the heater. Means are provided to correlate changes in the electrical energy to the heating content of the fuel sample.

Abstract translation: 用于确定可变组合物的燃料气流的热值的装置利用限定小体积燃烧室的高热导率的壳体，并填充有围绕电阻加热器的高导热颗粒床。 加热器将室内部的温度保持在燃料气体的燃烧点之上，以完全燃烧封闭的样品。 颗粒床将燃烧的加热效应传递到壳体。 附接到壳体的温度传感器与反馈控制器通信，反馈控制器通过适当地调节供应给加热器的电能来保持壳体温度恒定。 提供装置以将电能的变化与燃料样品的加热含量相关联。