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公开(公告)号：US5491424A
公开(公告)日：1996-02-13
申请号：US289716
申请日：1994-08-12
申请人： Madhu P. Asar , Harry L. Maddox
发明人： Madhu P. Asar , Harry L. Maddox
CPC分类号： G01R27/205 , G01R31/04
摘要： A test fixture is provided for testing the resistance associated with contamination material on the surface of electrical contacts mounted to a printed circuit board. A probe used to engage the contacts consists of first and second conductive probe segments which form a sandwich about a layer of insulating material. A current source provides a constant alternating current which is applied across the first and second probe segments. Circuitry is provided for amplifying the alternating current voltage developed across the first and second probe segments in response to the constant current. Circuitry is provided for rectifying the amplified alternating current voltage to provide a direct current voltage which is proportional to the measured resistance of the contact engaged by the probe. Data corresponding to the bulk and contact resistance associated with the clean contact is stored in memory of a computer. The bulk resistance represented by the stored data is subtracted from the measured resistance represented by the DC voltage of the contact under test in order to determine the contamination resistance.
摘要翻译： 提供测试夹具，用于测试与安装到印刷电路板的电触头表面上的污染物质相关的电阻。 用于接合触点的探针由第一和第二导电探针段组成，其围绕绝缘材料层形成夹层。 电流源提供施加在第一和第二探针段上的恒定交流电流。 提供电路用于响应于恒定电流来放大在第一和第二探针段上产生的交流电压。 提供电路用于整流放大的交流电压以提供与由探针接合的触点的测量电阻成比例的直流电压。 与清洁接触相关的体积和接触电阻相应的数据存储在计算机的存储器中。 为了确定耐污染性，从由测试的接触的直流电压表示的测量电阻中减去由存储数据表示的体积电阻。
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公开(公告)号：US5473254A
公开(公告)日：1995-12-05
申请号：US289717
申请日：1994-08-12
申请人： Madhu P. Asar
发明人： Madhu P. Asar
CPC分类号： G01R27/205 , G01R31/043
摘要： A test fixture is provided for testing the resistance associated contamination material on the surface of electrical contacts mounted to a printed circuit board. An elongated probe is provided which has an axis perpendicular to X and Y planes. A mechanism is provided for maintaining the probe in a precise perpendicular orientation to the X and Y planes while permitting movement of the probe along its axis in the Z plane to engage an aligned contact. A predetermined bias force is exerted by the probe along its axis while engaging the contact to be tested.
摘要翻译： 提供了一种测试夹具，用于测试安装在印刷电路板上的电触头表面上的与电阻相关的污染物质。 提供了具有垂直于X和Y平面的轴的细长探针。 提供了一种用于将探针保持在与X平面和Y平面精确垂直取向的机构，同时允许探针沿着Z轴平面中的轴线移动以接合对准的接触。 探针沿其轴线施加预定的偏压力，同时接合待测试的触点。
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73.发明授权Soil electrode assembly for protecting and supporting an electrode member for measuring the resistivity of a volume of the soil 失效用于保护和支撑用于测量土壤体积的电阻率的电极构件的土壤电极组件
公开(公告)号：US5450012A
公开(公告)日：1995-09-12
申请号：US120779
申请日：1993-09-15
CPC分类号： G01V3/02
摘要： A soil electrode assembly supports an electrode member disposed in soil in front of another electrode member so that a resistivity of a volume of the soil that is between the electrode members is measured by energizing and monitoring the electrode members. The soil electrode assembly includes a substantially flat support member having two principal opposite faces and a lower end drivable into the soil. The support member is made of rigid material. One of the faces of the support member includes a first opening providing an access to a first compartment. The soil electrode assembly also includes a substantially flat insulating member having two principal opposite faces. The insulating member is mounted in the first compartment. One of the faces of the insulating member includes a second opening providing an access to a second compartment. An electrode member is mounted in the second compartment.
摘要翻译： 土壤电极组件支撑设置在另一个电极构件前面的土壤中的电极构件，使得通过激励和监测电极构件来测量电极构件之间的土壤体积的电阻率。 土壤电极组件包括具有两个主要相对面的基本平坦的支撑构件和可移动到土壤中的下端。 支撑构件由刚性材料制成。 支撑构件的一个面包括提供进入第一隔室的第一开口。 土壤电极组件还包括具有两个主要相对面的基本平坦的绝缘构件。 绝缘构件安装在第一隔室中。 绝缘构件的一个表面包括提供进入第二隔室的第二开口。 电极构件安装在第二隔室中。
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74.发明授权
公开(公告)号：US5428296A
公开(公告)日：1995-06-27
申请号：US888592
申请日：1992-05-27
CPC分类号： G01R27/20
摘要： A probe assembly for measuring resistivity of a soil is connected to a measuring apparatus capable of generating a constant DC current signal into two electric leads. The probe assembly includes a short circuit connector; double-pole double-throw switch having two fixed contacts, and two switched contacts alternatively connectable to the electric leads or to the short circuit connector, respectively; and two electrodes connected to the fixed contacts respectively. Each of the electrodes has a portion of its surface forming a conductive surface. The conductive surfaces are substantially opposite to each other when the electrodes are put into the soil. In a stand-by position, the switched contacts are connected to the short circuit connector. In an operating position for measurement, the switched contacts are connected to the electrical leads, whereby when a measurement is performed, the switched contacts are switched from the stand-by position to the operating position so that the DC current signal can be injected into the electrodes and produce a voltage between the electrical leads that is indicative of the resistivity of the soil between said electrodes.
摘要翻译： 用于测量土壤电阻率的探针组件连接到能够将恒定的直流电流信号产生为两个电引线的测量装置。 探针组件包括短路连接器; 具有两个固定触点的双极双掷开关，以及可分别连接到电引线或短路连接器的两个开关触点; 和分别连接到固定触头的两个电极。 每个电极具有其表面的一部分形成导电表面。 当电极放入土壤时，导电表面基本上彼此相对。 在待机位置，开关触点连接到短路连接器。 在用于测量的操作位置中，开关触点连接到电引线，由此当进行测量时，开关触点从待机位置切换到操作位置，使得DC电流信号可以被注入到 电极，并且在电引线之间产生电压，其表示所述电极之间的土壤的电阻率。
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公开(公告)号：US5021625A
公开(公告)日：1991-06-04
申请号：US362990
申请日：1989-06-08
CPC分类号： B23K11/256 , G01R27/205
摘要： A preweld resistance check for resistance welding machines uses an open circuited measurement to determine the welding machine resistance, a closed circuit measurement to determine the parallel resistance of a workpiece set and the machine, and a calculation to determine the resistance of the workpiece set. Any variation in workpiece set or machine resistance is an indication that the weld may be different from a control weld.
摘要翻译： 电阻焊机的预焊电阻检查使用开路测量来确定焊接机电阻，闭路测量以确定工件组和机器的并联电阻，以及用于确定工件组的电阻的计算。 工件设置或机器阻力的任何变化表明焊缝可能与控制焊缝不同。
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公开(公告)号：US4649374A
公开(公告)日：1987-03-10
申请号：US568604
申请日：1984-01-06
申请人： Jan C. Hoigaard
发明人： Jan C. Hoigaard
CPC分类号： G01R31/025 , G01R27/20 , G01R31/026 , Y10S128/908
摘要： An electrostatic system monitor and method for monitoring the operation of static control equipment such as conductive workbench and floor mats, conductive wrist straps, and the integrity of ground connections and soldering irons and to activate indicators and alarms when the static control equipment deteriorates or malfunctions by having resistances outside of predetermined values and ranges of resistance. The electrostatic system monitor also provides for the detection of unsafe voltage potentials on soldering irons, and for a surface resistance probe for measuring the surface conductivity of conductive surfaces of the static control equipment.
摘要翻译： 一种用于监控静电控制设备（例如导电工作台和地板垫，导电腕带）以及接地连接和烙铁完整性的静电系统监视器和方法，并且当静态控制设备恶化或故障时激活指示器和报警 具有超过预定值和电阻范围之外的电阻。 静电系统监视器还提供检测烙铁上的不安全电压电位，以及用于测量静态控制设备的导电表面的表面电导率的表面电阻探头。
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77.发明授权Measuring attachment connectible to a multimeter for measuring earth resistances 失效可连接万用表测量接地电阻的测量附件
公开(公告)号：US4590421A
公开(公告)日：1986-05-20
申请号：US549457
申请日：1983-11-07
申请人： Daniel Arnoux , Jean Bousquet , Claude Genter
发明人： Daniel Arnoux , Jean Bousquet , Claude Genter
CPC分类号： G01R27/20
摘要： The invention provides a measuring attachment connectible to a multimeter for measuring earth resistances, comprising a casing having a first group of terminals for a measurement signal and a second group of terminals for electrical connection of the attachment to a multimeter, and electric circuits housed in the casing and comprising generator means for generating an AC current of constant value but of a frequency different from that of the mains and its harmonics, said generator means having an output connected to first and second terminals of said first group of terminals, and a synchronous detector having a measurement signal input which is connected to said second terminal and to a third terminal of said first group of terminals, a control input which is connected to said generator means and an output which is connected to first and second terminals of said second group of terminals.
摘要翻译： 本发明提供了可连接到万用表测量接地电阻的测量附件，包括具有用于测量信号的第一组端子的壳体和用于将附件电连接到万用表的第二组端子，以及容纳在该测量信号中的电路 壳体并且包括用于产生恒定值但是与电源及其谐波不同的频率的AC电流的发电机装置，所述发电机装置具有连接到所述第一组端子的第一和第二端子的输出端，以及同步检测器 具有连接到所述第二端子和所述第一组端子的第三端子的测量信号输入端，连接到所述发生器装置的控制输入端和连接到所述第二组端子的第一和第二端子的输出端 终端。
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公开(公告)号：US4577086A
公开(公告)日：1986-03-18
申请号：US530657
申请日：1983-09-09
摘要： A method and apparatus of monitoring the resistance characteristics of a circuit carrying an alternating current or a current having an alternating component is described. The apparatus includes first integration or averaging means for integrating or averaging the potential drop for the period between instants when the instantaneous current has the same value in a current loop; and display means for displaying a value representative of the output from the integration or averaging means.
摘要翻译： 描述了监测承载具有交替分量的交流电流或电流的电路的电阻特性的方法和装置。 该装置包括第一积分或平均装置，用于在瞬时电流在电流回路中具有相同值时在时刻之间积分或平均电位降; 以及显示装置，用于显示代表积分或平均装置的输出的值。
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公开(公告)号：US4430610A
公开(公告)日：1984-02-07
申请号：US333509
申请日：1981-12-22
CPC分类号： H02H11/001 , G01R27/20 , G01R27/205 , G01R31/021
摘要： The grounding of an electrical apparatus is monitored by a primary circuit which is inductively coupled to a coil connected in series between the grounding line of the power cord and a grounding terminal on the electrical apparatus to which a second grounding line is connected.
摘要翻译： 电气设备的接地由主电路监控，该主电路与电源线的接地线与连接有第二接地线的电气设备上的接地端子串联连接的线圈感应耦合。
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公开(公告)号：US4356444A
公开(公告)日：1982-10-26
申请号：US216385
申请日：1980-12-15
申请人： Alfredo Saenz, Jr.
发明人： Alfredo Saenz, Jr.
IPC分类号： G01R27/20
CPC分类号： G01R27/20 , C23F13/22 , C23F2213/32
摘要： An apparatus for testing the pipe-to-soil potential of a buried pipeline having a plurality of rectifiers electrically connected to it in spaced-apart intervals for applying an electrical potential to the pipe includes a plurality of interrupter units electrically connected to the rectifiers for turning them on and off at intervals. A clock reference unit is electrically connectable to each of the interrupters for synchronizing them for turning all of the rectifiers on and off in unison. A portable sensing device produces signals indicative of the pipe-to-soil potential of the pipe and directs these signals to a demultiplexer unit which is also synchronized with the clock reference unit for separating the signals corresponding to the ON and OFF potentials which are then separately recorded.The method of the invention thus includes alternately turning each rectifier on and off, synchronizing the turning on and off of all of the rectifiers, producing signals indicative of the pipe-to-soil potential of the pipe at various positions therealong and separating the signals indicative of the ON and OFF potentials in synchronization with the rectifiers so that the ON and OFF potentials may be separately recorded.
摘要翻译： 一种用于测试具有多个整流器的埋地管道的管间土电位的装置，其间隔开间隔地隔开间隔地向管道施加电势，该多个整流器电连接到整流器用于转动 他们间歇地打开和关闭。 时钟参考单元可电连接到每个断路器，用于使它们同步，以一致地打开和关闭整个整流器。 便携式感测装置产生指示管道的土壤潜力的信号，并将这些信号引导到解复用器单元，该解复用器单元也与时钟参考单元同步，用于分离对应于接通和关断电位的信号， 记录。 因此，本发明的方法包括交替地使每个整流器打开和关闭，同步所有整流器的接通和断开，产生指示管道在其各个位置处的管道到土壤势的信号，并且分离信号指示 与整流器同步的ON和OFF电位，使得ON和OFF电位可以被单独记录。
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