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公开(公告)号：US11624759B1
公开(公告)日：2023-04-11
申请号：US17654234
申请日：2022-03-09
发明人： Chih-Chieh Liao , Chih-Feng Cheng , Yu-Min Sun
摘要： A testing socket includes a metal block, an assembly block, an analog ground probe pin and a digital ground probe pin. The metal block is formed with a concave portion and used to connect to an independent main ground. The assembly block is electrically isolated from the metal block, and detachably embedded in the recess, so that the metal block and the assembly block are assembled together to be a probe holder. The digital grounding probe is inserted in the metal block, electrically connected to the independent main ground through the metal block. The digital ground probe pin can be electrically connected to a device to be tested (DUT) and the independent main ground. The analog ground probe pin is inserted in the assembly block, and electrically connected to the DUT and another independent main ground.
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公开(公告)号：US11578566B2
公开(公告)日：2023-02-14
申请号：US17159943
申请日：2021-01-27
IPC分类号： G01R27/18 , E21B41/00 , G01R31/12 , G01R27/20 , E21B43/117
摘要： An inspection tool and associated methods for testing physical and electrical properties of a perforating gun and sending the perforating gun to a wellbore site with at least one of an electrical property and a dimension that has been previously verified. The perforating gun may be received in a perforating gun holder positioned between a first connecting portion and second connecting portion. The first connecting portion may be moved from a first position to a second position at which the at least one of the electrical property and the dimension is measured. Upon verification that the at least one of the electrical property and the dimension is within a predetermined specification, the perforating gun may be sent to the wellbore site.
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公开(公告)号：US11249123B2
公开(公告)日：2022-02-15
申请号：US17134564
申请日：2020-12-28
发明人： Zhimin Dan , Yizhen Hou , Weiping Sun , Meng Li , Wei Zhang , Teng Yu
IPC分类号： G01R27/20 , H01H47/00 , H01M10/42 , B60L50/60 , B60L3/00 , B60L3/12 , G01R31/327 , G01R31/00
摘要： Provided is a method and device for obtaining internal side and external side insulation resistances of a relay. The method includes: controlling an insulation resistance obtaining circuit to output an AC signal; when both a main relay and a pre-charge relay are switched off, obtaining a first phase shift of the AC signal between two sampling points according to first collected electrical signals; obtaining an internal side insulation resistance of the main relay according to the first collected electrical signals and the first phase shift; controlling the pre-charge relay to be switched on; when the main relay is switched off and the pre-charge relay is switched on, obtaining a second phase shift of the AC signal between the two sampling points according to second collected electrical signals; and obtaining an external side insulation resistance of the main relay according to the second collected electrical signals and the second phase shift.
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公开(公告)号：US20210215739A1
公开(公告)日：2021-07-15
申请号：US17116838
申请日：2020-12-09
发明人： Hisato KAWAHARA , Hiroaki YUASA , Hidetoshi KUSUMI
IPC分类号： G01R1/04 , H01R13/193 , H01R13/11 , G01R27/20
摘要： An evaluation method is a method for evaluating a charging connector in coolability by connecting an evaluation jig to the charging connector, the charging connector including a pair of male terminals coolable with a coolant, the evaluation jig including a pair of female terminals, the pair of female terminals being connected to the pair of male terminals in evaluating the charging connector in coolability. The method comprises: connecting the pair of female terminals to the pair of male terminals; adjusting a connection state between the male terminal and the female terminal such that contact resistance between the terminals is 0.06 mΩ or more and 0.15 mΩ or less; and after the adjusting, evaluating the coolability depending on whether the male and female terminals have a temperature of 90° C. or lower when a charging current of 400 A is supplied to the terminals for 30 minutes.
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公开(公告)号：US11016131B2
公开(公告)日：2021-05-25
申请号：US16072969
申请日：2016-04-29
申请人： HP INDIGO B.V.
发明人： Gideon Amir
摘要： In an example, monitoring circuitry includes a first and a second coupling to electrically connect the monitoring circuitry to a monitored circuit having a resistance. The resistance of the monitored circuit may be indicative of a status, and the monitored circuit may be connected in series between the first and second coupling. The first coupling comprises a plurality of galvanically separated connection elements which are to form an electrical connection with a common connection element of the monitored circuit. The monitoring circuitry further comprises a monitoring apparatus to determine the resistance of the monitored circuit via the first coupling and the second coupling. The monitoring apparatus is to acquire a plurality of electrical values and to use the plurality of electrical values to determine a value of the resistance of the monitored circuit.
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公开(公告)号：US20210116486A1
公开(公告)日：2021-04-22
申请号：US17134564
申请日：2020-12-28
发明人： Zhimin DAN , Yizhen Hou , Weiping Sun , Meng Li , Wei Zhang , Teng Yu
摘要： Provided is a method and device for obtaining internal side and external side insulation resistances of a relay. The method includes: controlling an insulation resistance obtaining circuit to output an AC signal; when both a main relay and a pre-charge relay are switched off, obtaining a first phase shift of the AC signal between two sampling points according to first collected electrical signals; obtaining an internal side insulation resistance of the main relay according to the first collected electrical signals and the first phase shift; controlling the pre-charge relay to be switched on; when the main relay is switched off and the pre-charge relay is switched on, obtaining a second phase shift of the AC signal between the two sampling points according to second collected electrical signals; and obtaining an external side insulation resistance of the main relay according to the second collected electrical signals and the second phase shift.
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公开(公告)号：US10921358B2
公开(公告)日：2021-02-16
申请号：US16526573
申请日：2019-07-30
发明人： Chih-Chiang Lai
摘要： A testing system for testing a device under test including a plurality of circuits under test includes a probe card, testing apparatus, and a controller. The probe card includes a plurality of probes temporarily coupled to the circuits under test. The testing apparatus holds the probe card and tests the circuits under test through tine probe card. The controller controls the testing apparatus and executes a testing procedure that includes: measuring the contact resistance values between the probe card and each of the circuits under test; determining a statistical value of the contact resistance values; determining whether the statistical value exceeds a first threshold; when the statistical value does not exceed the first threshold, setting a clean flag to be in a first state; otherwise, setting the clean flag to be in a second state; and performing a clean operation on the probes according to the clean flag.
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公开(公告)号：US20200049748A1
公开(公告)日：2020-02-13
申请号：US16580921
申请日：2019-09-24
摘要： A system and method for determining material resistivity. A current of one or more frequencies is generated using a circuitry. The one or more frequencies is directed using one or more electrodes into a surround-ing material. The resistivity of the material surrounding the electrodes and a drilling tool is measured by detecting the current at the one or more fre-quencies.
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公开(公告)号：US20190072610A1
公开(公告)日：2019-03-07
申请号：US16083512
申请日：2017-03-15
申请人： WESTERNGECO LLC
发明人： Kambiz Iranpour , Stefan Johansson , Hans Paulson
摘要： Embodiments disclosed herein are directed towards systems and methods for electric current leakage detection in a land seismic system. Embodiments may include generating at least one test signal using a digital to analog converter “DAC” circuitry, wherein the DAC circuitry includes an output operatively connected to earth ground. Embodiments may further include alternately grounding a positive path to an analog to digital converter “ADC” circuitry during a first time window and a negative path to the analog to digital converter during a second time window while measuring an ADC signal. Embodiments may also include determining an average amplitude of the first time window and the second time window and determining a leakage resistance based upon, at least in part, the average amplitude of the first time window and the second time window.
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公开(公告)号：US20190064239A1
公开(公告)日：2019-02-28
申请号：US15978975
申请日：2018-05-14
发明人： Chung Seok Lee , Eun Byul Kim , Kyeong Yeol Heo
摘要： A display device including a first substrate including a display area and a non-display area, a circuit film connected to the first substrate, a printed circuit board (PCB) connected to the circuit film, and a first inspection pad, a second inspection pad, and a third inspection pad located in the non-display area and a bridge configured to electrically connect the first inspection pad, the second inspection pad, and the third inspection pad. The circuit film includes a first line electrically connected to the first inspection pad, a second line electrically connected to the second inspection pad, a third line electrically connected to the third inspection pad, and a branch point configured to branch at least one line from the first line, the second line, and the third line into two sub-lines. The PCB includes a test pad unit connected to the first line, the second line, and the third line.
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