Abstract: A magnetic field sensor comprises a power source, an indicator and a microprocessor. The power source supplies current to the indicator. The indicator turns on when a magnetic field is sensed and the indicator turns off when a magnetic field is not sensed. The microprocessor renders the indicator inoperable a predetermined period of time after the magnetic field sensor is powered up.

Abstract: An MRI room door assembly for use in protecting an entrance to a room containing an MRI scanner system. The assembly comprising a doorframe that is suitable to be fixed in position within or around an opening to the room, a door that is fixed to the doorframe, and an sealing arrangement that seals the door to the frame when it is at rest in the closed position and which is released as a user initiates an opening of the door. At least one or more of the door and the doorframe include a built in safety system which provides a function relating to preventing ferrous objects being brought unintentionally close to the MRI scanner system.

Abstract: A capacitance-to-voltage conversion circuit including a variable capacitance element, an integration circuit, and first and second sample and hold circuits. Capacitance value of the variable capacitance element varies depending on a physical quantity. The integration circuit outputs a voltage as a result of integration. The first sample and hold circuit samples and holds the voltage. The second sample and hold circuit samples and holds the sampled voltage and performs a simultaneous sampling operation in synchronism with the first sample and hold circuit at the same period as at least an initial sampling period. The second sample and hold circuit performs a sampling operation at a rear-end period in a sampling period of the first sample and hold circuit other than the sampling period.

Abstract: A method is provided for measuring a thickness of a layer of rubber-like material. The layer of rubber-like material includes a free face in contact with air and a face joined to an adjacent reinforcement made of elements electrically insulated from one another. Each of the elements includes at least one hysteretic material having a magnetic permeability greater than the magnetic permeability of air. According to the method, a sensitive element, which emits an alternating magnetic field, is brought towards the layer of rubber-like material whose thickness is to be measured, hysteretic losses in the adjacent reinforcement are measured at terminals of the sensitive element, and a thickness of the layer of rubber-like material is evaluated based on the hysteretic losses.

Abstract: A magnetic field measurement device capable of accurate measurement of a magnetic field even after a sensitivity of an MI sensor varies is provided. A magnetic field measurement device (1) includes an MI sensor (2) and a sensitivity calculation means (3). The MI sensor (2) includes a magneto-sensitive body (20), a detection coil (21) and a magnetic field generation coil (22) that generates a magnetic field upon energization. The sensitivity calculation means (3) varies a current flowing in the magnetic field generation coil (22) in a state where an outside-sensor magnetic field HO acting on the magneto-sensitive body (20) from outside the MI sensor (2) is constant. Consequently, the magnetic field acting on the magneto-sensitive body (20) is varied to calculate a sensitivity a by dividing a variation in an output voltage of the detection coil (21) by a variation in the magnetic field acting on the magneto-sensitive body (20).

Abstract: An electronic apparatus includes a first detection electrode group, a second detection electrode group, a third detection electrode group, a rotating member for moving among positions in which the rotating member faces the first to third detection electrode groups, a detection unit for detecting electrostatic capacitances of the first to third detection electrode groups, a determination unit for determining a rotation direction, a rotation amount, or a rotation angle of the rotating member in accordance with the electrostatic capacitances of the first to third detection electrode groups and threshold values for the first to third detection electrode groups, and an updating unit for updating a reference value of one of the first to third detection electrode groups corresponding to a selected smallest electrostatic capacitance using the selected smallest electrostatic capacitance.

Abstract: There is provided an apparatus, a monitoring arrangement, a method, a crane and a tool for monitoring a condition of an elongated ferrous object having a longitudinal axis. Two magnetizing circuits including magnetic poles are arranged along the longitudinal axis of the object. A magnetic flux guide connects the poles. The magnetizing circuits are arranged around the object at opposite sides along the longitudinal axis, wherein the magnetizing circuits are hinged together to be movable between a closed position, where the object is enclosed between the poles of the magnetizing circuits and an open position, where monitored object is removable from the apparatus.

Abstract: OBJECT To improve the strength of a probe guide and improve the abrasion resistance of the probe guide. MEANS FOR SETTLEMENT A guide plate 20 is formed of a silicon plate 22 having guide holes 23 respectively adapted to support contact probes 13, the inner walls of the guide holes 23 include a guide film 25 formed on the inner wall surfaces of corresponding penetration-processed holes 24 of the silicon plate 22, the cross-sectional areas of the penetration-processed holes 24 gradually increase toward a first surface of the silicon plate 22, and the film thickness of the guide film 25 gradually increases toward the first surface of the silicon plate 22. By employing such a configuration, as compared with the tilts of the inner wall surfaces of the penetration-processed holes 24, the tilts of the inner wall surfaces of the guide holes 23 can be suppressed, and the strength of the silicon plate 20 can be improved. Accordingly, the abrasion resistance of a probe guide 100 can be improved.

Abstract: An electromagnetic sensing system operates either in land environments or in marine environments on the floor of a body of water to measure electromagnetic fields. The sensing system has electrodes that provide capacitive coupling to the local environment where measurements are being made. A new method of deployment in water provides considerable size and weight reductions. The size and weight reductions also facilitate deployment and rapid repositioning on land. The system is particularly beneficial for surveying sites adjacent to bodies of water.

Abstract: A clamp meter is revealed. The clamp includes a pair of jaws disposed on a main body. The main body is arranged with a display panel and a plurality of buttons. The pair of jaws can be opened or closed by manual operation to get data of an object that users intend to measure. The data is transferred to the main body and shown on the display panel. Users can switch to the electrical parameter that they need by pressing the buttons. The clamp meter features on a plurality of indicator lights disposed on the pair of jaws. Users can obtain current data directly by observing the indicator lights.

Abstract: A measuring circuit for a multisensory detector is provided, including a plurality of detection branches mounted in parallel, with each detection branch of said plurality of detection branches including at least two dipoles mounted in series, and at least one reference branch, including a polarizing source and another at least two dipoles mounted in series, with the reference branch being connected in parallel to at least two detection branches among the plurality of detection branches, so as to form a Wheatstone bridge with each one of the detection branches among the plurality of detection branches.

Abstract: A measuring system and drive system with a measuring system, a magnet, a transmitter, and a magnetic field sensor. The magnetic field sensor is arranged between the magnet and the transmitter. The transmitter has a number of segments made of a magnetically conductive material, each segment having a wing shape with a web edge that is radially directed outwards, each web edge being diagonally designed towards the rotational direction, and that each web edge is distanced from the magnetic field sensor by an air gap.

Abstract: A sensor circuit and method. The circuit includes a first subcircuit that includes a first sense capacitor, a first integration capacitor, and a first clock input for receiving a first digital clock signal for initiating discharge of the first integration capacitor at time T. The circuit includes a second subcircuit that includes a second sense capacitor, a second integration capacitor, and a second clock input for receiving a second digital clock signal for initiating discharge of the second integration capacitor at time T+Td. A rate of discharge of the first and second integration capacitors is at least partly determined by a capacitance of the first and second sense capacitor, respectively. At time Teval, after initiation of discharge of the first and second sense capacitors, the extent to which the first and second integration capacitors have discharged is compared. A digital signal indicating the result of the comparison is outputted.

Abstract: An orientation sensor includes a sensor housing, a sensor actuator, and a motion sensor. The sensor housing has a cavity disposed therein. The sensor actuator is disposed within the housing and is configured for movement within the cavity in a direction that is influenced by a magnetic field between the sensor actuator and an electronic device external to the orientation sensor. The motion sensor is disposed within the housing and configured to detect the direction of movement of the sensor actuator within the cavity.

Abstract: The disclosure concerns an electromagnetic logging tool for recording the electromagnetic properties of a subterranean rock formation. One version of the disclosure includes an electromagnetic transmitter that transmits an electromagnetic signal into a downhole formation, an electromagnetic receiver that receives the electromagnetic signal formation; and a cavity antenna in which the interior of the cavity contains a metamaterial made up of a plurality of unit cells that include split ring resonators or other devices such as electric-LC resonators.

Abstract: The disclosure concerns a device for obtaining electromagnetic measurements in a wellbore. In one implementation, the device includes an electromagnetic source carried by the device and a metamaterial arranged to cover a portion of the device in order to divert electromagnetic waves from the source around the covered portion of the device. In one version, the electromagnetic radiation from the source impinging on the portion of the device covered by the metamaterial, and on the electronics carried by the devices that are covered by the metamaterial is reduced. Depending on the implementation, the electromagnetic source may be an antenna, such as a coil antenna. Also, the antenna coil may be wrapped circumferentially around the tool.

Abstract: The present invention relates to a spring contact, which is integrally formed by blanking and bending a metal plate member, the spring contact comprising: an upper head portion 32 having an upper tip 31 protruding upward; a spring portion (36) formed by a strip cylindrically bent, the strip extending in a zigzag pattern from an upper connection portion 35 extending downward from the upper head portion 32; a lower head portion 39 extending downward from a lower connection 37 extending from the lower end of the spring portion 36; and a lower tip 40 being provided on the lower end of the lower head portion 39. The present invention is advantageously suitable for manufacturing a fine-pitch spring contact and can improve productivity and reduce manufacturing costs.

Abstract: A combination test device including detection circuitry, outlet tester circuitry, and a single housing. The detection circuitry is configured to wirelessly detect a voltage. The outlet tester circuitry electrically is configured to perform a plurality of electrical outlet testing functions. The single housing has a first end, a second end opposite the first end, and an enclosure between the first end and the second end. The enclosure encloses the detection circuitry positioned at the first end and encloses the outlet tester circuitry positioned at the second end.

Abstract: The invention relates to a device (1) for measurement of an angle of an axis of rotation (10), comprising a magnet (12) with a magnet surface (14), which is pivotally assembled at the axis of rotation (10), and further comprising a sensor (16) for recognition of external magnetic flux lines of the magnet (12). According to the invention, the magnet (12) comprises at least a first magnet section (20) with a magnetic first orientation (22) and the magnet (12) further at least comprises a second magnet section (24) with a second magnetic orientation (26), wherein the first magnetic orientation (22) is displaced from the second magnetic orientation (26), whereby the magnet surface (14) comprises a different concentration of external magnetic flux lines.

Abstract: Methods and apparatus to provide an integrated circuit having a magnetic sensing element having differential first and second outputs and an input, the input to receive current and first and second switches coupled to a respective one of the differential first and second outputs. A first voltage source is coupled between the first and second switches, the first and second switches having a first state in which the first voltage source is coupled across the differential first and second outputs, and an IC output can output a voltage corresponding to the first voltage source when the first and second switches are in the first state for monitoring operation of a signal path from the magnetic sensing element to the IC output.