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    • 2. 发明申请
    • Pressure and temperature measurement of a piezo-resistive device using differential channel of a ratiometric analog to digital converter
    • 使用比例模数转换器的差分通道的压阻元件的压力和温度测量
    • US20060052967A1
    • 2006-03-09
    • US11199761
    • 2005-08-09
    • James ChampionKenneth CupplesWojtek Miller
    • James ChampionKenneth CupplesWojtek Miller
    • G01D1/00G06F15/00G06M11/04
    • G01D21/02
    • A temperature and pressure measuring circuit is provided. The circuit comprises an uncompensated pressure transducer, an analog-to-digital converter, a reference resistive device, and first and second switches. The transducer has variable resistive devices between first, second, third, and fourth bridge nodes. The analog-to-digital converter has first and second reference inputs and first and second differential inputs. When the first switch couples the first differential input and the third bridge node and the second switch couples the second differential input and a ground, a bridge voltage is measurable and a bridge resistance is ratiometrically determinable. The bridge resistance is employed to calculate a temperature. When the first switch couples the first differential input and the first bridge node and the second switch couples the second differential input and the second bridge node, a differential voltage is measurable. The differential voltage is employed to calculate a pressure.
    • 提供温度和压力测量电路。 该电路包括无补偿的压力传感器,模数转换器,参考电阻装置以及第一和第二开关。 传感器在第一,第二,第三和第四桥节点之间具有可变电阻装置。 模数转换器具有第一和第二参考输入以及第一和第二差分输入。 当第一开关耦合第一差分输入和第三桥接节点并且第二开关耦合第二差分输入和地时,桥电压是可测量的,并且桥电阻是可计量确定的。 采用桥电阻来计算温度。 当第一开关耦合第一差分输入和第一桥接节点并且第二开关耦合第二差分输入和第二桥接节点时,差分电压是可测量的。 使用差分电压来计算压力。
    • 5. 发明授权
    • Machine fault detection using vibration signal peak detector
    • 使用振动信号峰值检测器进行机器故障检测
    • US5895857A
    • 1999-04-20
    • US840844
    • 1997-04-17
    • James C. RobinsonBrent VanvoorhisWojtek Miller
    • James C. RobinsonBrent VanvoorhisWojtek Miller
    • G01H1/00G01N29/11G01N29/12G01N29/46G01N29/48G01N29/00
    • G01N29/12G01H1/003G01N29/11G01N29/449G01N29/46G01N29/48G01N2291/2696
    • A signal processing device for processing a machine vibration signal includes a peak value detector for determining the peak vibration amplitude values during predetermined sample time periods. In one embodiment, the vibration signal is digitally processed prior to receipt by a digital peak value detector. In another embodiment, analog processing and peak value detection of the vibration signal is employed. The peak values are then made available for further processing. In many situations, the peak values will be associated with mechanical faults which will be detected at periodic rates corresponding to the mechanical component defect frequencies without additional signal enhancement. Further enhancement can be acquired by synchronous averaging the peak values with the speed of a rotating element. A signal representing the speed of a rotating element (target element) may be obtained directly from a speed sensor that is measuring the speed of the target element, or if the target element is inaccessible, a corrected pseudo-speed signal can be calculated from the speed of an accessible rotating element that is linked to the target element. Transformation of synchronous amplitudes to the frequency domain by means of a fast Fourier transform reveals information that can be used to assess whether or not a fault is present in the rotating machine element.
    • 用于处理机械振动信号的信号处理装置包括用于在预定采样时间段内确定峰值振幅值的峰值检测器。 在一个实施例中,振动信号在数字峰值检测器接收之前被数字处理。 在另一个实施例中,采用振动信号的模拟处理和峰值检测。 峰值随后可用于进一步处理。 在许多情况下,峰值将与机械故障相关联,机械故障将以对应于机械部件缺陷频率的周期速率检测,而不需要额外的信号增强。 可以通过使峰值与旋转元件的速度同步平均来获得进一步的增强。 可以从正在测量目标元件的速度的速度传感器直接获得表示旋转元件(目标元件)的速度的信号,或者如果目标元件不可访问,则可以根据目标元件的速度来计算校正的伪速度信号 连接到目标元件的可触及旋转元件的速度。 通过快速傅里叶变换将同步幅度转换到频域,显示可用于评估旋转机器元件中是否存在故障的信息。
    • 6. 发明申请
    • Wireless tank monitoring system having satellite communications capability
    • 具有卫星通信能力的无线水箱监控系统
    • US20060111040A1
    • 2006-05-25
    • US10996804
    • 2004-11-24
    • Patrick JenkinsPaul KronauWojtek Miller
    • Patrick JenkinsPaul KronauWojtek Miller
    • H04B7/185
    • H04B7/18513
    • A wireless tank monitoring system for remotely monitoring a plurality of storage tanks is provided. This tank monitoring system utilizes wireless communication from individual tank level monitors to a single SatComm Gateway. The SatComm Gateway then utilizes a low-Earth Orbit satellite constellation to transmit information to a central data collection center. The data collection center then provides access to this information to clients. These clients also have the capability of controlling individual monitors via the bi-directional communications path through the satellite link to the SatComm Gateway to the individual monitors. The SatComm Gateway packages the information from each of the monitors to optimize the communications through the satellite link to decrease the cost of transmission. Intrinsic safety is provided by each of the individual tank level monitors.
    • 提供一种用于远程监测多个储罐的无线罐监视系统。 这种油罐监控系统利用从单个油罐液位监测器到单个SatComm网关的无线通信。 然后,SatComm网关利用低地球轨道卫星星座将信息传输到中央数据采集中心。 然后,数据收集中心向客户端提供对此信息的访问。 这些客户端还具有通过双向通信路径通过卫星链路将个人监视器控制到SatComm网关到个人监视器的能力。 SatComm Gateway将来自每个监视器的信息进行封装,通过卫星链路优化通信,以降低传输成本。 每个坦克液位监视器都提供本质安全。
    • 8. 发明授权
    • Wireless tank monitoring system having satellite communications capability
    • 具有卫星通信能力的无线水箱监控系统
    • US08223027B2
    • 2012-07-17
    • US10996804
    • 2004-11-24
    • Patrick A. JenkinsPaul D. KronauWojtek Miller
    • Patrick A. JenkinsPaul D. KronauWojtek Miller
    • G08B21/00
    • H04B7/18513
    • A wireless tank monitoring system for remotely monitoring a plurality of storage tanks is provided. This tank monitoring system utilizes wireless communication from individual tank level monitors to a single SatComm Gateway. The SatComm Gateway then utilizes a low-Earth Orbit satellite constellation to transmit information to a central data collection center. The data collection center then provides access to this information to clients. These clients also have the capability of controlling individual monitors via the bi-directional communications path through the satellite link to the SatComm Gateway to the individual monitors. The SatComm Gateway packages the information from each of the monitors to optimize the communications through the satellite link to decrease the cost of transmission. Intrinsic safety is provided by each of the individual tank level monitors.
    • 提供一种用于远程监测多个储罐的无线罐监视系统。 这种油罐监控系统利用从单个油罐液位监测器到单个SatComm网关的无线通信。 然后,SatComm网关利用低地球轨道卫星星座将信息传输到中央数据采集中心。 然后,数据收集中心向客户端提供对此信息的访问。 这些客户端还具有通过双向通信路径控制各个监视器的能力,通过卫星链路将SatComm网关连接到各个监视器。 SatComm Gateway将来自每个监视器的信息进行封装,以通过卫星链路优化通信,从而降低传输成本。 每个坦克液位监视器都提供本质安全。