32 results about "Stray voltage" patented technology

Apparatus and methods for detecting stray voltage anomalies in electric fields are provided herein. In some embodiments, an apparatus for detecting an electrical field may comprise: at least one sensor probe for generating data corresponding to an electrical field detected by the at least one sensor probe, wherein the at least one sensor probe comprises at least one electrode; a processor, coupled to the at least one sensor probe, for analyzing the data to identify a voltage anomaly in the electric field; and an indicator, coupled to the processor, for alerting a user to a presence of the voltage anomaly in the electric field.

A measuring device which uses two linked switches to carry out detection for measuring device is featured as carrying out stray current and stray voltage measurement of the earth to have accurate measuring result for earthing resistance, carrying out detection for connection state of resistance measuring device to earthing electrode to avoid measurement error caused by break point in connection.

Systems, methods, and apparatuses may be provided for stray voltage detection. The systems, methods and apparatuses may include providing a first antenna at a first location relative to a monitored equipment or structure, where the first antenna may be operative to detect a first electric field strength at the first location, providing a second antenna at a second location relative to the monitored equipment or structure, where the second antenna may be operative to detect a second electric field strength at the second location, and detecting a stray voltage based at least in part upon the detected first electric field strength and the second electric field strength.

The present invention is directed towards a mobile apparatus mounted to a motor vehicle for detecting energized objects. In some embodiments, the mobile apparatus comprising two or more photonic sensors, mounted to the motor vehicle, and coupled to a photo-receiver, wherein the photo-receiver generates a signal corresponding to an electric field detected by the two or more photonic sensors, for narrowing down the location of a hazardously energized object, a processor, coupled to the two or more photonic sensors, that digitizes the signal to form electric field data, produces field strengths of each of the at least one sensor probes, analyzes the field strengths to identify a general location of the hazardously energized object in the electric field, wherein the electric field data is analyzed based on an expected frequency pertaining to hazardous energy to locate an energized object proximate a street; and an indicator, coupled to the processor, that alerts a user to a presence of the energized object in the electric field proximate the street.

The invention discloses a method for calibrating characteristic waves of a power network by utilizing clock stamps, including the following steps: firstly, the waveform of voltage current of the power network is sampled, and the sampling value of stray voltage current is obtained; satellite signals are received during sampling, standard time information is generated and is maintained and processed, and the time of occurrence of an interrupt signal during sampling is recorded so as to form the clock stamp; secondly, Fourier transform is carried out on the sampling value of the stray voltage current, and the amplitude and the phase positions of fundamental and higher harmonics are obtained; thirdly, sampling instant high-accuracy clock stamps are added to the obtained amplitude and the phase positions of the fundamental and higher harmonics so as to form and transmit a data packet to other sites of the power network. The invention utilizes satellites for time synchronization so as to provide a uniform, high-accuracy and high-precision signal source for a vast geographical region, thereby eliminating the disadvantages of low accuracy of time synchronization, difficult data comparison, high data transmission quantity, and the like of a wide area network.

A system and method for monitoring and mitigating leakage currents is disclosed. The data acquisition system records data from multiple monitoring locations over extended periods of time to identify stray voltage and/or leakage currents present at the monitoring location. The data is processed to identify trends in the stray voltage and/or leakage currents and to suggest methods for mitigating the same.

A system and method are disclosed for providing an improved rack arm system wherein insulating material is utilized to guard against stray voltage. The system and method entail providing insulated rack arm systems for installation in new locations as well as a snap-on insulating piece for utilization with existing rack arm systems.

The invention discloses an all-side-pin-free flat semiconductor device packaging structure and method. The packaging structure comprises a lead frame and a bridge frame. The edge of the lead frame is provided with a plurality of cutting positioning marks. The cutting positioning marks partition the lead frame to lead frame units connected in a multi-row and multi-column mode. The bridge frame comprises bridge frame units connected in a multi-row and multi-column mode. When packaging is conducted, the bridge frame is arranged on the lead frame in a stacked mode, the cutting positioning marks are exposed, and the bridge frame units cover the lead frame units. The all-side-pin-free flat semiconductor device packaging structure has the following advantages that the current bearing capacity of a semiconductor device is improved, and a copper bridge can absorb the heat generated by chips instantaneously; the package cost is reduced; lower stray voltage is provided; production efficiency and package reliability are improved, integrated package to the maximum degree is achieved, and the utilization space is greatly increased.

A stray voltage suppression device includes a motor-driven conductive vane which rotates in planes oriented at least substantially parallel to the ground, with the motor casing being connected to the ground below. The device has been found useful to reduce or eliminate stray voltage about the area at which it is installed.

The invention discloses ground resistance measuring equipment and a ground resistance measuring method for a large transformer substation. The device comprises a current electrode, a voltage transformer, a current transformer, a controllable switch KA, a test power supply and a numerical control device. The ground resistance measuring equipment and the ground resistance measuring method for the large transformer substation provided by the invention have the technical effects that ground resistance measuring equipment of a controllable switch is additionally arranged in a current measurement loop, and the device can realize measuring ground stray current and stray voltage, so that the interference of stray current values and stray voltage values can be excluded when the ground resistance is measured, and the accuracy for measuring the ground resistance can be improved; in addition, the device is simple in structure and easy to operate, and a measuring value is not needed to be corrected repeatedly in the process of measuring.

A stray voltage detection system for detecting a stray voltage in pool water within a pool The system comprises a pair of elongate conductive elements, with one of the elongate conductive elements having a detector electrode end and a terminal end, and with the other elongate conductive element having a reference electrode end and a terminal end. The detector electrode end is positioned adjacent to an electrical fixture within the pool and the reference electrode end is positioned opposite from the detector electrode end. The terminal ends are connected to a microprocessor for measuring a voltage between the detector electrode end and reference electrode end. A voltage detection system for a pier, with the system having a pair of elongate conductive elements attached to a pair of corresponding pier pilings on opposite sides of a pier deck, and with the pair of conductive elements for measuring a voltage between the conductive elements.

A non-invasive measurement system (110) for measuring the electrical potential of a voltage source (20, 120) includes a sensing electrode (50, 151) spaced from the voltage source (20, 120). Preferably the voltage source (20, 120) is within a biological cell (115) located in a nutrient bath (119) including electrolytic medium (117) and an object (30, 190) is a portion of the electrolytic fluid (117) located between the cell (115) and the sensing electrode (50, 151). A feedback electrode (181) is formed in an annular shape and surrounds the sensing electrode (50, 151) thus creating an annular fluid region therebetween. The value of the voltage in the annular region (131) is set substantially equal to the value of the voltage in the object (190) and therefore the impedance between the object (190) and a stray voltage source (40) is maximized.

A directional flow current transducer is used as a transient stray voltage detector including a first transducer providing an output signal indicating the magnitude of stray current carried by a new grounding wire, and a second, separate transducer providing an output signal indicating the direction of the stray voltage (for either direct and/or alternating stray voltages). The new grounding wire might be between an equi-potential plane of a concrete platform for watering livestock and a grounding bus bar for grounding the service bond of the main electrical service panel, at a significant distance from the watering platform. The output of the directional flow current transducer is recorded, stored and analyzed as a function of time. Preferably by allowing comparison with the output of a second directional flow current transducer, the system allows transient, directional and locational stray voltage/stray current problems to be better identified, understood and addressed.