公开(公告)号：US4140908A

公开(公告)日：1979-02-20

申请号：US821882

申请日：1977-08-04

申请人： Tom L. Erb

发明人： Tom L. Erb

IPC分类号： G01F23/288 ,  G01F23/00

CPC分类号： G01F23/2885

摘要： In a switching circuit for controlling the level of material in a container, a first counter accumulates pulses generated at a rate inversely related to the level of the material up to a first predetermined total. A second counter accumulates clock pulses up to a second predetermined total representing a fixed counting interval. The counters are connected in a race circuit wherein the one to reach its predetermined total first resets both counters and controls the race circuitry. The first counter sets a control circuit to indicate a low level condition or to activate an alarm, and the second counter resets the control circuit to indicate a high level condition. After the control circuit has been set by the first counter, the race circuit is responsive to a third predetermined total of the first counter, less than the first predetermined total, representing, for example, a level to which a container is to be filled. The first and third predetermined totals provide a hysteresis effect to prevent the switching circuit from "hunting" around the level at which material is to be added or an alarm condition shown.

摘要翻译： 在用于控制容器中的材料水平的开关电路中，第一计数器以与材料的电平相反的速率产生的脉冲产生直到第一预定总数的脉冲。 第二计数器累积表示固定计数间隔的第二预定总数的时钟脉冲。 计数器连接在赛道电路中，其中达到其预定总量的计数器首先复位两个计数器并控制比赛电路。 第一计数器设置控制电路以指示低电平状态或激活警报，并且第二计数器复位控制电路以指示高电平状况。 在第一计数器设置了控制电路之后，比赛电路响应第一计数器的第三预定总数，小于第一预定总数，表示例如要填充容器的水平。 第一和第三预定总计提供滞后效应，以防止开关电路围绕要添加材料的水平或所示的报警状态“摆动”。

公开(公告)号：US5495218A

公开(公告)日：1996-02-27

申请号：US230387

申请日：1994-04-20

申请人： Tom L. Erb ,  Michael H. Fesler ,  Hugh L. Perry, III

发明人： Tom L. Erb ,  Michael H. Fesler ,  Hugh L. Perry, III

IPC分类号： H01P1/08 ,  H01P5/00

CPC分类号： H01P1/08

摘要： A microwave waveguide is presented which includes a gas tight seal which provides pressure isolation between two portions of the waveguide. In accordance with an important feature of this invention, an upper flange includes a threaded axial opening for receiving and retaining a threadably mated dielectric filling material. If the thread pitch is small relative to the signal wavelength, the threaded section has essentially the same electrical characteristics as a smooth waveguide. The resulting structure provides an economical and practical method of retaining a solid dielectric filling material in a waveguide against high pressure without changing the effective diameter of the waveguide. In accordance with another feature of this invention, a novel high pressure seal is provided between the upper and lower flanges in the area surrounding the threaded axial opening. This high pressure seal comprises the capture of a membrane or disk of soft material, preferably polytetrafluoroethylene (PTFE), in an essentially constant volume, closed cavity. The PTFE thus acts like a compressed fluid and provides for high pressure gas operation in hostile environmental conditions with reduced failure relative to prior art PTFE (or like materials) to metal sealing arrangements. In accordance with still another feature of this invention, the sealing membrane or disk described above is rendered thin (on the order of 0.002 to 0.020 inches) and includes outer dimensions which are larger than the outer dimensions of the waveguide. The disk or membrane is thin enough so as not to impact the electrical characteristics of the waveguide.

摘要翻译： 提出了一种微波波导，其包括气体密封，其在波导的两个部分之间提供压力隔离。 根据本发明的重要特征，上凸缘包括用于接收和保持螺纹配合的电介质填充材料的螺纹轴向开口。 如果螺距相对于信号波长较小，则螺纹部分具有与光滑波导基本相同的电特性。 所得到的结构提供了一种在不改变波导的有效直径的情况下将固体电介质填充材料保持在波导中以抵抗高压的经济实用的方法。 根据本发明的另一特征，在围绕螺纹轴向开口的区域中，在上凸缘和下凸缘之间设置有新的高压密封。 该高压密封包括在基本上恒定体积的封闭空腔中捕获软质材料（优选聚四氟乙烯（PTFE））的膜或盘。 因此PTFE因此像压缩流体一样起作用，在恶劣的环境条件下提供高压气体操作，相对于现有技术的PTFE（或类似材料）与金属密封装置相比，具有降低的故障。 根据本发明的另一个特征，上述密封膜或盘变薄（约0.002至0.020英寸），并且包括大于波导的外部尺寸的外部尺寸。 盘或膜足够薄，以免影响波导的电特性。

公开(公告)号：US4590579A

公开(公告)日：1986-05-20

申请号：US539045

申请日：1983-10-04

申请人： Tom L. Erb

发明人： Tom L. Erb

IPC分类号： G01N9/24 ,  G01N23/12 ,  G01N7/00 ,  G01N9/00

CPC分类号： G01N9/24 ,  G01N23/12

摘要： A device is provided for enabling the signal generated by a sensing device to be presented which is representative of the property sensed of a flowing material over a conveyor, or the like. The output is presented for observation and/or as a usable input to control means responsive to the sensed property. A pair of signals, one with a slow time constant, the other with a fast time constant, is derived from the sensing device signal. An output signal is in turn derived from one of the two signals, normally the slow. From the event rate in the sensing device, the expected statistical deviation is computed and utilized as the threshold of divergence of the pair of signals. When the divergence exceeds the threshold, the fast signal is switched to be the same value as the slow signal so that no perceptible perturbation appears in the output and the output signal is derived from the fast signal. At the next and each successive fast time constant, if the convergence still exists, the slow signal is set equal to the fast signal. When the divergence ceases, the value of the slow signal is switched to be the value of the fast signal and the output is switched to come from the slow signal for stable representation of a stable condition.

摘要翻译： 提供了一种用于使得能够呈现由感测装置产生的信号的装置，其代表通过输送机等上的流动材料感测的特性。 该输出被提供用于观察和/或作为对可检测属性的响应的控制装置的可用输入。 从感测装置信号导出一对信号，一个具有慢时间常数的信号，另一个具有快速时间常数。 输出信号又从两个信号中的一个导出，通常是慢的。 根据感测装置中的事件速率，计算预期的统计偏差并将其用作该对信号的发散阈值。 当发散超过阈值时，快速信号被切换为与慢信号相同的值，使得输出中不出现可感知的扰动，并且从快速信号导出输出信号。 在下一个和每个连续的快速时间常数中，如果收敛仍然存在，则将慢信号设置为等于快速信号。 当发散停止时，慢信号的值被切换为快速信号的值，并且输出被切换为来自慢信号以稳定表示稳定条件。

公开(公告)号：US4295378A

公开(公告)日：1981-10-20

申请号：US120189

申请日：1980-02-11

申请人： Tom L. Erb ,  Wendell D. Miller

发明人： Tom L. Erb ,  Wendell D. Miller

IPC分类号： G01F1/66

CPC分类号： G01F1/663

摘要： A method of placement of transducers on a pipe in positions where their beam axes intersect a point on the locus of points where the incremental flow is equal to the average flow is shown and described.

摘要翻译： 示出并描述了将换能器放置在管道上的位置，其中它们的光束轴线与增量流量等于平均流量的点的轨迹上的点相交的位置。

公开(公告)号：US5305237A

公开(公告)日：1994-04-19

申请号：US729457

申请日：1991-07-12

申请人： Thomas H. Dalrymple ,  Buford R. Jean ,  Tom L. Erb ,  Frederick L. Whitehead

发明人： Thomas H. Dalrymple ,  Buford R. Jean ,  Tom L. Erb ,  Frederick L. Whitehead

IPC分类号： B67D7/36 ,  G01F23/284 ,  G01F23/00

CPC分类号： B67D7/362 ,  G01F23/284

摘要： A method and system for monitoring the level of flowable material contained in a transportable vessel that utilizes microwave gauging technology. The system includes a microwave lens/seal assembly, a microwave transceiver assembly, a controller/processor assembly and a computer. The lens/seal assembly is permanently secured to the vessel. The microwave transceiver assembly is adapted to be releasably attached to the vessel. The controller/processor assembly and the computer may be located at a loading/unloading facility.

摘要翻译： 一种用于监测使用微波测量技术的运输容器中包含的可流动材料的水平的方法和系统。 该系统包括微波透镜/密封组件，微波收发器组件，控制器/处理器组件和计算机。 透镜/密封组件永久固定在容器上。 微波收发器组件适于可释放地附接到容器。 控制器/处理器组件和计算机可以位于装载/卸载设施。

公开(公告)号：US4396911A

公开(公告)日：1983-08-02

申请号：US248075

申请日：1981-03-27

申请人： James V. Motsinger ,  Tom L. Erb

发明人： James V. Motsinger ,  Tom L. Erb

IPC分类号： G01F23/00 ,  G01F23/288 ,  G08B21/00

CPC分类号： G01F23/2885 ,  G01F23/0069

摘要： An apparatus for monitoring the level of material in a plurality of hoppers or bins includes a radiation source and sensor associated with each hopper. Each sensor generates an output signal representing the incidence of radiation passing through the material in the respective hopper. The sensor output signals are supplied to individual sample/hold circuits where they are temporarily stored. A central control circuit cyclically reads the stored signals from the sample/hold circuits and then generates a reset signal to clear the sample/hold circuits. The central control circuit compares the sum of the sensor output signals for each sensor over a predetermined time interval with at least one reference signal representing a predetermined material amount to generate a status signal for each hopper. A plurality of indicator circuits are responsive to respective condition of the status signals for visually and/or audibly indicating to an operator the status of the material level in the associated hopper.

摘要翻译： 用于监测多个料斗或料仓中的材料水平的装置包括与每个料斗相关联的辐射源和传感器。 每个传感器产生一个表示通过相应料斗中的材料的辐射入射的输出信号。 传感器输出信号被提供给临时存储的各个采样/保持电路。 中央控制电路循环地读取来自采样/保持电路的存储信号，然后产生复位信号以清除采样/保持电路。 中央控制电路将预定时间间隔内的每个传感器的传感器输出信号的总和与表示预定材料量的至少一个参考信号进行比较，以产生每个料斗的状态信号。 多个指示器电路响应状态信号的相应条件，以在视觉上和/或可听见地向操作者指示相关漏斗中的材料水平的状态。

公开(公告)号：US4279167A

公开(公告)日：1981-07-21

申请号：US80730

申请日：1979-10-01

申请人： Tom L. Erb ,  Wendell D. Miller

发明人： Tom L. Erb ,  Wendell D. Miller

IPC分类号： G01F1/66 ,  G01N29/02

CPC分类号： G01F1/663 ,  G01N2291/02836

摘要： A coupling device for attachment of a sonic doppler flowmeter to pipes or conduits is shown and described. In this coupling, a temperature compensated liquid wedge is used to couple the transducer to the wall of the pipe or conduit, and means are shown and described for eliminating bubbles from the liquid wedge region.

摘要翻译： 示出并描述了用于将声波多普勒流量计连接到管道或管道的耦合装置。 在该耦合中，温度补偿液体楔用于将换能器耦合到管道或管道的壁上，并且示出并描述了用于消除液体楔形区域中的气泡的装置。