Abstract: A weighing section includes a plurality of weighing members and a power supply mechanism. The weighing members weigh an object while moving. The power supply mechanism includes a fixed section, a rotatable section moving along the movement of the weighing members, a primary coil provided on the fixed section, and a secondary coil provided on the rotatable section. The power supply mechanism supplies power to the primary coil, retrieves an induced electromotive force from the secondary coil, and supplies power to the weighing members.

Abstract: A down hole apparatus for measure while drilling usage comprising, in combination, a housing including one or more housing unit sections along apparatus, and defining an axis length, a motor stator for a motor driven by drilling fluids, a motor rotor for said motor driven by drilling fluid, a bent subassembly at the lower end of said downhole apparatus, said subassembly providing a relatively small angular deviation between said housing unit axis and an axis defined by said bent subassembly, an output shaft extending within said bent subassembly for use in driving a drill bit, a bearing assembly to support said output shaft for rotation within said housing, a torsion bar or flexible shaft connecting said motor rotor to said output shaft, said torsion bar or flexible shaft accommodating both eccentric motion of said rotor and the bend and relative motion between the said main housing axis and the bent subassembly axis, and a sensor and data transmission assembly located on the main housing in a parallel relati

Abstract: If external magnetic field(s) (external noise) is/are present, equivalent noise component(s) might be produced at both receiving coil(s) and dummy coil(s), and respective noise components from receiving coil(s) and dummy coil(s) might be made to at least partially cancel out one another at differential amplifier(s), substantially only signal component(s) due to magnetic field(s) from transmitting coil(s) being applied by way of differential amplifier(s) to comparator(s), where same is/are binarized and is/are moreover output by way of output control circuitry and respective transistor(s).

Abstract: The present invention is directed to a method for decreasing high frequency (HF) radiation emission in a power line. The method involves transmitting a utility power signal over the power line and transmitting a high frequency communication signal over the power line so as to provide a combined utility and high frequency signal over the power line. A plurality of inductors are provided, disposed along the power line.

Abstract: A system for transmitting data through a string of downhole components. In one aspect, the system includes first and second magnetically conductive, electrically insulating elements at both ends of the component. Each element includes a first U-shaped trough with a bottom, first and second sides and an opening between the two sides. Electrically conducting coils are located in each trough. An electrical conductor connects the coils in each component. In operation, a varying current applied to a first coil in one component generates a varying magnetic field in the first magnetically conductive, electrically insulating element, which varying magnetic field is conducted to and thereby produces a varying magnetic field in the second magnetically conductive, electrically insulating element of a connected component, which magnetic field thereby generates a varying electrical current in the second coil in the connected component.

Abstract: The invention relates to an inductive transmitter for transmitting measurement data and electrical energy between two components (1, 2) that move in relation to each other, having at least one primary (3, 5) and at least one secondary transmitter component (4, 6). There is one transmitter (3, 4) for transmitting measurement data and one transmitter (5, 6) for transmitting electrical energy, with the primary (3, 5) and secondary (4, 6) transmitter components being disposed in separate chambers (7, 8) that are magnetically shielded from each other to a large extent. The chambers (7, 8) are formed on the components by concentric, radial metal walls of the chamber elements (1, 2), with the concentric walls extending into each other in such a way that they form chambers (7, 8) situated radially one behind the other.

Abstract: A terminal for generating an electromagnetic field adapted to communicating with at least one transponder, and a method for controlling such a terminal including: an oscillating circuit adapted to being excited by a remote supply signal of the transponder; an amplitude demodulator for detecting possible data transmitted by the transponder; circuitry for regulating the signal phase in the terminal's oscillating circuit on a reference value; circuitry for measuring variables linked to the current in the oscillating circuit and to the voltage thereacross; and circuitry for comparing current values of these variables to predetermined values, to determine the presence of a transponder.

Abstract: A signal repeater, a system utilizing one or more signal repeaters, and a method for detecting a transient disturbance in the surface charge on drill pipe, which system, apparatus and method are collectively used to transfer data from deep-well and high-conductivity formation subterranean environments to a point nearer to the surface. The signal repeater comprises a housing that is securably mountable to the interior of a pipe-string disposed in a wellbore, which repeater receives and stores electrical signals for resending at an appropriate time.

Abstract: A system for monitoring the temperature prevailing in the stator unit of an electric drive includes a temperature sensor that is integrated into the windings of the stator unit and that transmits a temperature-dependent sensor signal. The sensor signal may be injected via an electrical transmitter unit into the signal processing unit of a position measuring device connected to the drive.

Abstract: Two A.C. output signals amplitude-modulated in accordance with two function values (sine and cosine) differing from each other in correspondence to a position-to-be-detected are received from a position sensor such as a resolver. By performing an addition or subtraction between a signal derived by shifting the electric phase of one of the received A.C. output signals by a predetermined angle, and the other received signal, two electric A.C. signals (sin(?t±d+?), sin((?t±d??)) are electrically synthesized which have electric phase angles (?) corresponding to the position-to-be-detected and are phase-shifted in opposite directions. “±d” here represents phase variation error caused by factors, other than the position-to-be-detected, such as temperature change. In the synthesized two signals, the phase variation errors (±d) appear in the same direction, while the phase differences (?) corresponding to the position are shifted in opposite, positive and negative, directions.

Abstract: A low voltage low power signal processing system and method for use in low power and/or portable measuring instruments such as linear or rotary encoders, electronic calipers and the like. In one embodiment, the analog-to-digital converter is implemented as a parallel, single ramp, with two matched comparators for each leg of differential input, which can be implemented with relatively simple circuitry, and consequently be of a small size. The system may be used with a three-phase transducer configuration, for which the preferred signal processing techniques are able to cancel most of the third harmonic distortion in the system, and for which the fully differential signal processing methods of the invention are advantageous. The invention may be used in a portable measuring instrument that operates from a single 1.5 volt watch battery or solar cell, and that has a current drain of 5 microamps.

Abstract: An apparatus for sensing variations in an inductive field, or inductive sensor. The inductive sensor is adapted for detecting the lateral offset of a vehicle within a roadway, especially those with multiple traffic lanes, without regard to lane boundaries, which may vary. Lateral offset information is necessary for determining lane usage statistics and is useful in detecting unsafe driving behaviors evidenced by erratic variations in lane position. Such unsafe driving behaviors are indicative of, for example, intoxicated or drowsy drivers, obstacles in the roadway requiring drastic avoidance measures, aggressive driving and other generally unsafe roadway conditions. In addition, lane position information can be passed back to the vehicle to allow for automated lane-keeping or passed to other detectors for self-calibration of the system.

Abstract: A system for transmitting data and/or energy between a chassis and a seat that is movably arranged on the chassis, the seat being able to glide with the aid of slides in guide rails attached to the chassis; one iron-core half of a transformer, the iron-core half bearing at least one primary winding is positioned on the slide gliding in the guide rail, the primary winding being a cable in the guide rail; and the other iron-core half of the transformer, having a secondary winding, is positioned on the seat, the two limbs of the other iron-core half being arranged in the longitudinal direction with respect to the guide rail, and both iron-core halves of the transformer being positioned relative to each other for the data and/or energy transmission.

Abstract: A current target angle stored in a target angle register is subtracted from the immediately preceding target angle stored in a register by a subtracting device. As a result, the length (amount) and direction between the immediately preceding target angle to the current angle are generated. With the generated length and direction, a model acceleration generating circuit generates model acceleration data. With a count value of a current velocity detecting counter and a velocity data sequence that is output from a model velocity generating circuit, velocity error data is generated. With a count value of a current position detecting counter and a position data sequence that is output from a model position generating circuit, position error data is generated. The model acceleration data, the velocity error data, and the position error data are added by an adding device. The added result is supplied to a driver. The driver outputs a current that drives a pan motor.

Abstract: A cable composed of material capable of conducting light, sound, or electricity is inserted by appropriate means into a material to be examined. A portion of said cable having predetermined parameters is fixed internally within the material. The cable is equipped with anchors that restrict movement within the material to be examined. Displacement or deformation of the material to be examined results in displacement and deformation of the sensor cable system. The anchors preferably concentrate stress or deformation at specific points of the cable as the cable deforms. The anchors may also allow movement of the cable such that displacement and deformation of the cable within the material is reduced.

Abstract: ? The inductive position sensor includes a scale (10) with a series of conductive loops spaced out by a pitch T and a cursor (20) provided with conductors forming each a series of alternating hairpin turns spaced out by a pitch T, the inducing (21 to 23; 42, 44) and induced (31 to 33; 41, 43) cursor conductors are laid out in two separate interlaced conductor groups, coupling between inducing and induced conductors of the second group taking place only via the scale loops. Such a sensor is simple, robust, accurate, insensitive to external electromagnetic fields and tolerant of misalignment between cursor and scale.

Abstract: A winding band including at least one conductor is arranged on a carrier in a housing, and is coupled to a rotative part, so that a wound-up length of a wound-up portion of the winding band varies corresponding to a rotational movement of the rotative part. At least one measuring inductor is arranged proximate to the wound-up portion of the winding band. The angular position of the rotative part is determined by detecting an electromagnetic field coupling between the measuring inductor and the wound-up portion of the winding band, and evaluating the amplitude, frequency and/or phase of an induced voltage arising in the inductor due to the coupling.

Abstract: A four-row tapered roller bearing is incorporated in the clearance between the inner surface of a housing and the outer surface of a rolling roller. A pair of supporting members supporting sensor devices are fitted in and supported by a part of the inner surface of the housing in such a manner that they are opposed to the ends of outer rings of the four-row tapered roller bearing disposed close to the both axial ends thereof. The sensor devices each comprise a distortion gauge as a detecting portion and a first coil for transmitting as a wireless signal a signal obtained by processing an output signal outputted from the distortion gauge. A second coil for receiving the wireless signal transmitted by the first coil is retained on a part of a member other than the supporting members.

Abstract: A terminal for generating an electromagnetic field adapted to cooperate with at least one transponder when the transponder enters the electromagnetic field, the terminal including circuitry for determining the distance separating the at least one transponder from the terminal without requiring any transmission from the transponder to the terminal. In one example, the terminal also includes a phase regulation loop that regulates the phase of a signal in an oscillating circuit of the terminal with respect to a reference value.

Abstract: The invention relates to an inductive transmitter for transmitting measurement data and electrical energy between two components (1, 2) that move in relation to each other, having at least one primary (3, 5) and at least one secondary transmitter component (4, 6). There is one transmitter (3, 4) for transmitting measurement data and one transmitter (5, 6) for transmitting electrical energy, with the primary (3, 5) and secondary (4, 6) transmitter components being disposed in separate chambers (7, 8) that are magnetically shielded from each other to a large extent. The chambers (7, 8) are formed on the components by concentric, radial metal walls of the chamber elements (1, 2), with the concentric walls extending into each other in such a way that they form chambers (7, 8) situated radially one behind the other.

Abstract: A direct current and an alternate current are simultaneously supplied from a constant current circuit to a detection coil. At least one of the ratio of the direct current to the alternate current, the ratio of an alternate current component to a direct current component of an impedance in a detecting section, a temperature characteristic of the ratio of the direct current to the alternate current, and a temperature characteristic of the ratio of the alternate current component to the direct current component of the impedance of the detecting section is set in such a manner that the margin of fluctuation of a temperature coefficient of a peak value of an output voltage from the detecting section in a whole displacement zone of a core relative to the detection coil is smaller than the margin of fluctuation of a temperature coefficient of the alternate current component of the impedance of the detection coil at the frequency of the alternate current.

Abstract: An inductive measuring transducer having bodies that are movable one relative to the other, one of such bodies (sensor component 2) comprising at least one inductive sensor (6) that produces an alternating magnetic field, and the other body (pickup component 1) comprising one or more inductive pickups into which the alternating magnetic field of the inductive sensor(s) (6) is/are injected, there being provided an electronic circuit (3) for supplying the inductive sensor (6) with an alternating current and a circuit for evaluating the output voltages of the measuring transducer, is characterized in that the pickup component (1) comprises a closed conductor loop (10) in which the one or more inductive sensors (6) of the sensor component (2) induce(s) a voltage so that a voltage curve independent of the position of the sensor component (2) relative to the pickup component (1) develops over the conductor loop (10), and that resistors (11) are connected along the conductor loop (10), which have their other ends co

Abstract: A method and a device for controlling a robot on the basis of data from sensors with their own sensor data structures. For solving the problem of adapting to different sensors and their data structures and consequently permitting in simple manner the use of different sensors without intervening in the actual robot control program, according to the system the sensor data are processed to robot control data with a control data structure usable by a system control program and a processing device suitable for the same is provided.

Abstract: An apparatus for sensing variations in an inductive field, or inductive sensor. The inductive sensor is adapted for detecting the lateral offset of a vehicle within a roadway, especially those with multiple traffic lanes, without regard to lane boundaries, which may vary. Lateral offset information is necessary for determining lane usage statistics and is useful in detecting unsafe driving behaviors evidenced by erratic variations in lane position. Such unsafe driving behaviors are indicative of, for example, intoxicated or drowsy drivers, obstacles in the roadway requiring drastic avoidance measures, aggressive driving and other generally unsafe roadway conditions. In addition, lane position information can be passed back to the vehicle to allow for automated lane-keeping or passed to other detectors for self-calibration of the system.

Abstract: A detect ion unit 10, which is disposed in opposite relation to a scale 12, includes a transmission coil 10a and a detection coil 10b. A metal film 10g formed of two opposing metal films is provided between a silicon substrate and the transmission coil 10a, one of the two metal films is connected to a drive circuit 10c, and the other is connected to the transmission coil 10a. The metal film 10g provides the capacitance C of an LC resonance circuit, so that a chip capacitor is made unnecessary. The metal film 10g may be formed of a magnetic material.

Abstract: A non-contact type displacement sensor is provided with a housing, a rotational shaft being in an approximately cylindrical hollow shape, a magnetic circuit forming member disposed in an inner space of the rotational shaft, and a magnetic sensing element supported by a housing so as to be positioned on a central axis of the rotational shaft in a space enclosed by the magnetic circuit forming member, wherein the magnetic sensing element is not displaced.

Abstract: An electromagnetic transponder including an oscillating circuit adapted to extracting from a radiating field a high-frequency amplitude-modulated signal, circuitry for extracting from said high-frequency signal an approximately D.C. supply voltage, a demodulator of data carried by the high-frequency signal, and circuitry for separately regulating the supply voltage and a useful voltage carrying the data.

Abstract: A system for transmitting data between a rotating system and a stationary system. This system has a patch antenna affixed to the surface of a rotating body. A transmitter splits an RF signal into n identical RF signals. The n RF signals are phase shifted to have phases that are 360 divided by n degrees apart. The RF signals are then sequentially applied to the n patch antennas which broadcast the RF signals. A stationary receive antenna receives broadcast RF signals from one of the n patch antennas at a time. As a first antenna rotates out of range of the receive antenna, second antenna rotates into range. The phase shift between the RF signals broadcast between from the first and second antenna assures that data is not lost as the rotation occurs.

Abstract: A wide-area remote telemetry system which monitors and controls remote devices by means of a information control system. The system uses a plurality of sensor interface modules which constantly monitor devices for triggering events. The sensor interface modules transmit information to at least one data collection module which gathers, process, stores and transmits information to a host system via standard external communication systems. The host module receives, records, processes, and transmits information to the network. The information may then be transmitted to customers or may be accessed by customers as desired.

Abstract: The use of an articulated transformer whose windings do not completely encircle the shaft, and with a small gap in-between being provided so that the mounting structure can be opened and the windings slipped over the shaft before being closed once again to form a tuned transformer resonating at the frequency of an electrical power oscillator connected to transmit electrical power from a first location towards a second location.

Abstract: The electrical apparatus comprises a monitoring device of at least one electrical component comprising electromagnetic receiving means connected to at least one sensor, and designed to receive an electromagnetic radiation from electromagnetic emitting means. The electrical switchgear support in the form of a rail comprises electromagnetic emitting means designed to emit an electromagnetic radiation to at least one electrical apparatus. The monitoring device comprises electromagnetic emitting means designed to emit an electromagnetic radiation to at least one electrical apparatus and to receive a return signal. The electrical installation comprising electrical apparatuses, at least one support and or a monitoring device.

Abstract: On an electric cooker the sensor circuit (1) detects the presence of a pan (2) on each heater (F1-F4) and comprises a microcontroller (4) and a generator (6,7) that supply a high-frequency current (Ig) to a respective sensor loop (E1-E4) of each heater which generates a magnetic field, and two maximum and minimum reference signals (Vr0,Vr1) for all the heaters (F1-F4) obtained in the working temperature condition and a circuit (9-13) for measuring and evaluating the voltage (Vs) produced in each sensor loop, with a circuit part (11,11′) for demodulation into low frequency of the measuring and reference signals (Vs,Vr0,Vr1), and their differential amplification (Vm,Vrr).

Abstract: A communication system which utilizes the building metal frame as a communication medium is described. More particularly, and in accordance with one embodiment of the present invention, a wire coil is located near to one of the frame pieces so that the coil lays flat in the plane of the building face. A time varying current in the coil creates a time varying magnetic dipole field. This field changes the flux within a “flux window” which is defined as one of the rectangular sections formed by the frame steel members. This changing flux creates a time varying potential around the window, which creates a time varying current that acts in opposition to the induced flux. This current also excites a time varying flux in the neighboring flux windows, which induces time varying fluxes in their neighbors and so on.

Abstract: A recording and/or reproducing apparatus (1) adapted to receive a record carrier (4) advantageously includes a transponder communication device (35) having a planiform station transmission coil (37) for the contactless communication with a record record-carrier transmission coil (50) combined with the record carrier (4), and includes holding means (51) for holding the station transmission coil (37) which extend away from the station transmission coil (37) into the space which is remote from the record-carrier transmission coil (50).

Abstract: Several sensors are provided for determining one of a number of physical roperties including pressure, temperature, chemical species, and other physical conditions. In general, the sensors feature a resonant circuit with an inductor coil which is electromagnetically coupled to a transmitting antenna. When an excitation signal is applied to the antenna, a current is induced in the sensor circuit. This current oscillates at the resonant frequency of the sensor circuit. The resonant frequency and bandwidth of the sensor circuit is determined using an impedance analyzer, a transmitting and receiving antenna system, or a chirp interrogation system. The resonant frequency may further be determined using a simple analog circuit with a transmitter. The sensors are constructed so that either the resonant frequency or bandwidth of the sensor circuit, or both, are made to depend upon the physical properties such as pressure, temperature, presence of a chemical species, or other condition of a specific environment.

Abstract: A method and system for transmitting data using a low frequency offset, differential voltage, OOK transmission technique have been described. According to one embodiment, an analog or digital signal is sent or received and converted, if necessary, into or from serial format onto or out of a power line. This signal is an OOK modulated sinusoidal offset signal with an associated differential voltage. Next, the transmitted signal is input into an additive coupler which serves as an interface to the power-line network. At the far end, an additive decoupler receives the transmission and sends the frequency out to the designated amplifiers to provide the needed voltages to activate the OOK detection system. This system uses current detection that is activated every time the designated OOK signal frequency is received. Further, the OOK signal is decoded and information split off to the designated leads.

Abstract: A test device (1) for testing a module (2) for a data carrier intended for contactless communication includes a carrier signal generator (14) which is arranged to generate a carrier signal (CS) whereby a test signal (TS) can be generated, a conductive connection being provided between the carrier signal generator (14) and a module (2) to be tested, which connection includes an impedance (31), preferably being a series resistor (31), which is connected directly ahead of a module terminal (5) of the module (2) to be tested, the test device (1) being provided with at least one detection device (34, 35) for determining an analog characteristic value (C, m) of a module (2) to be tested while utilizing the test signal (TS) appearing on an impedance terminal (32) of the impedance (31).

Abstract: The present invention provides a subsurface instrument and a system for the collection and transmission of deep ocean data utilizing standard buoy mooring lines. The system includes a moored surface buoy and a submerged data collection instrument both inductively coupled to the buoy cable. The instrument has a transducer responsive to the characteristics of seawater. A slave modem is interconnected to the transducer through an A/D converter allowing analog transducer signals to be converted to standard telephone modem signals. The modem signals are inductively coupled into the mooring cable and received by a master modem located in the buoy. The buoy may contain a satellite transceiver allowing transmission of the signals to a remote location. The subsurface instrument is battery powered and battery life is extended by powering down when the instrument is not in use.

Abstract: An encoder comprises position detecting device for detecting a magnetic pole position and a rotational position of a motor. The encoder also includes a memory portion for storing parameter information particular to the motor or the position detecting device. A transmitting portion of the encoder is provided for externally transmitting parameter information particular to the position detecting device as a differential signal. A transmission suspension request detecting device is provided for detecting that the differential signal is driven by a given signal externally provided such that the differential signal does not exist as a transmission signal and for generating a transmission suspension request signal requesting suspension of transmission of the differential signal.

Abstract: A universal utility usage data gathering system that is capable of operating with any other read pad data gathering system, regardless of protocol. The universal system comprises of two components. One—a transponder which is the actual device that accumulates utility usage and will transfer accumulated usage to a reader/interrogator system. Two—the universal reader/interrogator, which will universally read any transponder for which the reader is programmed to accept from the transponder read pad. The universal reader/interrogator is based on standard micro-electronic chips and utilizes a multi-tapped antenna making the device capable of communicating with any transponder. The universal reader/interrogator will determine what protocol from any transponder.

Abstract: A magnetic induction time-multiplexed two-way short-range wireless communications system, and related method, includes a first portable unit and a second portable unit. The first portable unit receives first unit input signals and provides first unit output signals. Also, the first portable unit includes a first unit transducer system for generating a first inductive field based upon the first unit input signals during a first time slot and for converting a second inductive field into the first unit output signals during a second time slot. The second portable unit receives second unit input signals and provides second unit output signals. Also, the second portable unit includes a second unit transducer system for generating the second inductive field based upon the second unit input signals during the second time slot and for converting the first inductive field into the second unit output signals during the first time slot.