摘要:
A condom testing apparatus utilizing an arcing electrical current to detect holes and excessively thin wall areas in a condom mounted on a conductive testing mandrel, where the condom is passed across a conductive fabric member to test the main body and transition portion of the condom, and is passed through the bristles of a conductive brush member to test the nipple end of the condom. In alternative embodiments, the apparatus may utilize only conductive fabric or only conductive brushes.
摘要:
A method of inspecting a crack in a ceramic substrate that is not exposed on the surface. The method can detect all cracks and make objective judgement possible by expressing the inspection result as numerical data. Conductors are disposed on both faces of a ceramic substrate, wherein one of the conductors is a conductive liquid; the insulation resistance value or an electric property dependent on the insulation resistance is measured with the conductive liquid or other conductors electrically connected to the conductive liquid which are used as electrodes.
摘要:
A method of determining the position and condition of reinforcing steel embedded in concrete is described. The method is non-invasive. Electrodes are use to carry out the method by contacting the outer surface of the concrete. The method measures the impedance of selected regions of the concrete by measuring the voltage generated across said selected regions by a current flowing through the concrete.
摘要:
A testing device for detecting defects in insulation of electrosurgical instruments that includes an implement or wand having a distal end, an electrode for generating a spark adapted to detect a defect in the insulation, and mounting means for removably mounting the electrode to the distal end of the implement. The removable mounting means includes a shank that is received in a socket or bore defined in the distal end of the wand and is engageable with the wand within the socket so the shank can easily be removed from the socket after use. The wand is releasably engageable with the housing by a flexible bracket that extends from the housing. The device may include a pad having a reflective top surface with ridges upon which the surgical instrument to be tested is placed.
摘要:
Methods are provided for detecting and locating leaks in liners used as barriers in the construction of landfills, surface impoundments, water reservoirs, tanks, and the like. Electrodes are placed in the ground around the periphery of the facility, in the leak detection zone located between two liners if present, and/or within the containment facility. Electrical resistivity data is collected using these electrodes. This data is used to map the electrical resistivity distribution beneath the containment liner between two liners in a double-lined facility. In an alternative embodiment, an electrode placed within the lined facility is driven to an electrical potential with respect to another electrode placed at a distance from the lined facility (mise-a-la-masse). Voltage differences are then measured between various combinations of additional electrodes placed in the soil on the periphery of the facility, the leak detection zone, or within the facility. A leak of liquid though the liner material will result in an electrical potential distribution that can be measured at the electrodes. The leak position is located by determining the coordinates of an electrical current source pole that best fits the measured potentials with the constraints of the known or assumed resistivity distribution.
摘要:
A method for detecting exposed steel in the surface of reinforced concrete, comprising the steps of: moving an electrode across an exposed surface of said concrete; connecting said electrode to one terminal of a power source; connecting the other terminal of said power source to the reinforcement of said concrete; said power source providing a high voltage current effective to produce a spark across an air gap occurring when exposed steel is detected, said spark initiating a means to signal the occurrence of said exposed steel.
摘要:
Disclosed is a method for measuring the metal exposure in a resin covering area of a metal container or a constituent member thereof, which comprises contacting the resin covering area of the metal container or the constituent member thereof with a measuring electrode through an electrolytic solution, relatively moving the resin covering area and the measuring electrode in a certain direction while always holding the electrolytic solution between the measuring electrode and the resin covering area, measuring a leak current between the metal substrate of the metal container or constituent member at predetermined pitches and detecting the metal exposure of the resin covering area as leak currents at respective parts discriminately.According to this measuring method, the degree of the metal exposure can be easily measured as the leak current at respective parts discriminately, and statistical processing of the measured leak current values can be easily performed.
摘要:
A method of and an apparatus for detecting damage to a buried object which includes the steps of (a) providing a buried object extending in a longitudinal direction which has an electrically insulating layer over a conductive member, (b) connecting one terminal of a power supply to the conductive member at a first position thereon, (c) connecting the other terminal of the power supply to an ammeter which is grounded, (d) connecting both terminals of at least one voltmeter to the conductive member on each side of the first position with the terminals of each voltmeter being spaced apart in the longitudinal direction, (e) connecting at least one voltmeter and the ammeter to data processing equipment for analyzing output values from the at least one voltmeter and the ammeter when power is supplied to the conductive member from the power supply, (f) supplying electric current from the power supply to the conductive member, and (g) measuring and comparing output values from the ammeter and the at least one voltmeter for detecting the presence of damage to the buried object and the relative location of any damage present as indicated by larger output values from any of the at least one voltmeter connected to the conductive member between the first position and a point of damage to the buried object.
摘要:
A system for testing plastic cuvette belts for leak holes in the cuvettes comprises an array of conductive probes which are inserted into respective ones of a group of adjacent cuvettes. Alternate probes are biased to opposite high potentials sufficient to create arcing between the probes through any faulty seal in the cuvettes. A grounded electrode outside the cuvette enables holes to the outside to be detected also.
摘要:
An electrode probe assembly for monitoring and finding fault in the glass lining of metal vessels, pipes or the like, characterized by a cup-shaped electrode with an insulated stud inserted through a hole in the wall of a mounting member. An insulating gasket insulates the electrode from the member. Resilient means bias the cup-shape electrode against the gasket preventing leakage due to shrinkage of the gasket. Electrical connection of an insulated circuit is made to the stud.