Abstract: A method is disclosed for determining the rotor angular position of a rotating electrical machine, which machine has a set of stator windings and a set of rotor windings, and in which method the set of stator windings is fed by an associated converter unit. First, the set of stator windings is then short-circuited at at least three predeterminable short-circuiting times by means of the converter unit within one revolution of the rotor given an assumed speed of the rotor. Then, the phase angle of the respective stator current is determined at each short-circuiting time, a differential phase angle being formed from phase angles determined at in each case two temporally adjacent short-circuiting times.

Abstract: The invention relates to a method for controlled braking of an electrically powered lifting action in the event of a failure, such that at least one of the nominal values for “rotational direction” and/or “operating speed” and/or “door position” and/or “motor capacity” and/or “motor current” is ascertained and compared with an actual value, and such that a motorized braking process or motorized stopping process is triggered by a departure of the actual value from the nominal value that lies outside a predetermined range. In addition the invention relates to a device for applying said method.

Abstract: A controller for controlling a sliding roof sets, as an operating area, a predetermined range in the sunroof slidable range and controls a motor driving the sliding roof such that the sliding roof slides in the operating area. When the sliding roof stops near a sliding lock end, the stop position is stored on an assumption that the positional deviation would occur. The sliding roof slides again from the stop position. Based on whether a traveling distance from the stop position to the sliding roof comes into contact with the tilt lock end is longer than the sunroof slidable range, the positional deviation is determined. It is possible to accurately determine whether the sliding member is locked and stopped by positional deviation or the intrusion of foreign object.

Abstract: An air cleaner is provided according to an embodiment of the invention. The air cleaner includes a volatile memory including an air cleaner state memory element and a non-volatile memory including an air cleaner state backup memory element. The air cleaner is configured to store an air cleaner state to the air cleaner state memory element of the volatile memory and store the air cleaner state to the air cleaner state backup memory element of the non-volatile memory.

Abstract: A wireless 3D auto-offset system for robot arms is provided. The wireless 3D auto-offset monitor sensor of the system includes an electronic leveling sensor, a Z-axis optical scale, and an XY-axes CCD monitor sensor for monitor and judgment of level states, offsets, and gaps, respectively.

Abstract: An object of the invention is to provide a servo control device capable of making zero the positional deviation the positional deviation at a constant speed as well as the positional deviation at a constant acceleration or at constant acceleration and jerk, thereby providing a high-precision follow-up response. In order to solve this problem, the servo control device according to the invention includes a position controller (3) for generating a speed command that matches the motor output with a target position, a feed-forward controller (4) for adding a signal obtained by multiplying the differential of a target command by a gain and a signal obtained by multiplying the second-order differentiation of the target command by a gain and generating a speed feed-forward signal, and a speed controller (2) for performing I-P or PI control of the motor (1).

Abstract: A motor control system for controlling a plurality of motors for moving an object in respectively different axial directions that includes a plurality of target devices, each target device including a (pulse width modulation) PWM signal generator that generates a PWM signal for driving a motor using a triangular signal, and a host device for supplying a synchronization signal to each of the target devices, wherein each target device is arranged with a corresponding motor, and each PWM signal generator resets the triangular signal in response to the synchronization signal.

Abstract: There is provided a controller for a motor capable of changing the phase difference between two rotors that can prevent demagnetization of permanent magnets or the rotors. The motor has two rotors each having a permanent magnet and phase difference changing driving means for changing the phase difference between the rotors. The controller has a demagnetization determining means for determining whether or not demagnetization of the permanent magnets of the rotors occurs during operation of the motor, and rotor phase difference controlling means for controlling the phase difference changing driving means to change the phase difference between the rotors from a current phase difference to a phase difference that results in a higher strength of a composite field of the permanent magnets if the result of determination by the demagnetization determining means is positive.

Abstract: This invention relates to a device and method for controlling the motor of treadmill, in which an operational frequency baseline value for the motor is pre-set in a frequency converter, according to the operational frequency of the motor being higher or lower than the pre-set baseline value, the six exiting coils of the motor would be controlled to be Y-wiring connected or ?-wiring connected, there of the motor is in Y-wiring in low speed operation and is in ?-wiring in high speed operation, with which high torque is maintained in whether the motor is running at high speed or low speed, and then speed stall is prevented to improve safety in use.

Abstract: The battery charger includes a first charging circuit controlling input power to charge an external battery detachably mounted to the charger; an internal secondary battery charged by the input power; a charge/discharge control circuit charging the internal battery by the input power and controlling a charge of the internal battery; and a control circuit controlling an operative state of the first charging circuit and the charge/discharge control circuit. The charger serves to charge the detachably mounted external battery both by the input power and by the internal battery. The charger is so structured that when the input power is not in a inputted state, the control circuit supplies the electric power from the internal battery to the charge/discharge control circuit into an operative state, where an operative state of the internal battery is controlled, thus discharging the internal battery to charge the external battery by the discharged electric power.

Abstract: A handheld mobile communication device includes a rechargeable first battery for powering the device. A charger includes a second battery. The charger is configured to be detachably coupled to and supported by the device. The device and the charger can be carried together as a single unit as the charger charges the first battery with power from the second battery.

Abstract: A battery isolator for an electrical system having a first battery, a second battery and a charging source continuously coupled to one of the first and second batteries. The battery isolator comprises an inductor having a first terminal and a second terminal, a first switch connected between a positive terminal of the first battery and the first terminal of the inductor, and a second switch connected between a second terminal of the inductor and a positive terminal of the second battery. The first and second switches are selectively actuated in a predetermined manner, such that the battery isolator can be used to charge one of the first battery and the second battery. At least one of the first and second switches may be selectively actuated to prevent one of the first and second batteries from substantially discharging the other battery when a charging source is not present.

Abstract: Battery chargers and combinations. In some aspects and in some constructions, the invention may provide a combination including a battery charger having a housing and a charging circuit, and protective structure separate from and connectable with the battery charger. The protective structure, when connected, extending from the housing beyond a battery connected to the battery charger. In some aspects and in some constructions, the invention may also provide a combination including a first battery charger, a second battery charger and a connecting structure operable to connect the first battery charger and the second battery charger as a unit. In some aspects and in some constructions, the invention may further provide a combination including a battery charger and a handle separate from and connectable with the battery charger. In addition, in some aspects and in some constructions, the invention may provide a battery charger including a housing having a base and an upper portion opposite the base.

Abstract: A battery management system (BMS) manages a battery for a hybrid vehicle including an engine control unit and a motor generator controlled by the engine control unit and connected to a battery including at least one battery pack, each pack including a plurality of battery cells. The BMS includes a sensor and an MCU unit. The sensor detects temperature, current, and open circuit voltage (OCV) of the battery. The MCU receives the detected temperature, current, and OCV, calculates a key-off time period which is a period between a time point when a battery key-on state ends and a time point when a subsequent battery key-on state begins, calculates an OCV error range corresponding to an SOC error range detected at the key-off time point, and infers an initial SOC of the battery.

Abstract: Provided is a charging and discharging protection circuit realizing low current consumption in an overcurrent detection state, easy calculation of an automatic return impedance, and high usability. A pull-down circuit for pulling down an overcurrent detection terminal to a VSS terminal is connected in series between the overcurrent detection terminal and a switching circuit. The switching circuit is connected in series between the pull-down circuit and the VSS terminal.

Abstract: An apparatus is provided to manage a charge/discharge current of an on-vehicle battery. The apparatus comprises a detecting unit detecting an actual amount of the charge/discharge current and a receiving unit receiving information indicating generating operations of an on-vehicle generator. The apparatus also comprises a control unit controlling the generating operations of the generator so that the charge/discharge current keeps a given value specified, on the basis of the detected actual the charge/discharge current and the received information. The apparatus also comprises determining and setting units. The determining unit determines whether a voltage of the battery satisfies a given condition for the voltage, by monitoring the voltage in a state where the generating operation of the generator is controlled. The setting unit sets, as an amount of offset of the charge/discharge current, a charge/discharge current detected when it is determined that the voltage of the battery satisfies the given condition.

Abstract: The state-of-charge adjusting apparatus which enables to shorten a time to reach a capacity equalization is provided. A CPU extracts a block consisting of a plurality of unit cells connected continuously to each other, the plurality of the unit cells each having a voltage higher than a target voltage, and connects both ends of each block to a discharge resistance to make each block discharge. Thereafter, the CPU extracts a unit cell having a voltage higher than the target voltage and connects both ends of the extracted unit cell to the discharge resistance to make the extracted unit cell discharge until the voltage of the extracted unit cell reaches the target voltage.

Abstract: A battery device includes a battery cell constituted by a secondary cell, a case that houses the battery cell, and a battery-side positive electrode terminal and a battery-side negative electrode terminal electrically provided in the case and connected to the battery cell. The battery device further includes a temperature detecting unit that detects the temperature of the battery cell, a temperature control unit that heats and/or cools the battery cell when an electric current is supplied thereto, and a current control unit that divides, according to the temperature detected by the temperature detecting unit, an externally-supplied charging current supplied from the outside via the battery-side positive electrode terminal and the battery-side negative electrode terminal into a first current supplied to the battery cell and a second current supplied to the temperature control unit.

Abstract: A method for charging portable electronic device is disclosed. When the portable electronic device is connected to a power source, the method selects a protecting mode or a fast charging mode to charge the battery according to the current operating status of the portable electronic device. Simultaneously, the battery power is also controlled within a safety range. Therefore, the invention can charge the battery of the portable electronic device at a high speed without affecting the efficiency of the device. Moreover, the battery is also protected from being overcharged to extend the life of the battery.

Abstract: [Problem] To enable easy charging control when charging a filter capacitor. [Means for Resolution] In an electric vehicle control apparatus, a converter 3 having a bridge circuit formed by making inverse-parallel connection of rectifying devices 1a to 1d and self-arc-suppressing devices 2a to 2d is connected to a secondary winding 5a of a main transformer 5, and a filter capacitor 8 is connected to an output end of the converter 3. Moreover, an inverter 9 that converts DC power to AC power is connected to both ends of the filter capacitor 8, and charging of the filter capacitor 8 is carried out before the inverter 9 is actuated.

Abstract: Apparatus and method are provided, for connecting prime mover driven alternator to circuit that has an existing alternating current. Alternator is connected to circuit when minimum current flows to or from alternator. The actual current is measured by controller following connection and the value of this current is used to determine the optimal connection conditions when alternator is next connected. Alternator is disconnected by controller by running down prime mover, monitoring the current and stalling prime mover when the current flow is at a minimum.

Abstract: A hand-held power tool has a drive motor driving a tool and a generator. One or more heating devices having one or more heating elements are provided. The generator supplies the one or more heating devices with energy. A control device controls a power supplied to the one or more heating elements as a function of at least one operating parameter of the drive motor.

Abstract: An apparatus for controlling a power converter operating in response to a modulating signal during successive switching cycles includes: (a) A signal sensor coupled with the converter and sensing an extant signal during the extant cycle. (b) A signal level predictor coupled for receiving a reference signal and establishing a predicted level for the extant switching cycle. (c) A comparer coupled with the signal sensor and the signal level predictor for presenting a first output signal when the extant signal and the predicted signal level have a first relationship and for presenting a second output signal when the extant signal and the predicted signal level have a second relationship. (d) A control unit coupled with the comparer and with the converter for interrupting presentation of the modulating signal to the converter device when the comparing unit presents a selected one of the first and second output signals.

Abstract: A voltage regulator having overvoltage protection is described, which is situated in a vehicle electrical system between the generator that is situated in a first voltage level and a battery that is situated in a second voltage level. A generator is used, in this instance, as a generator whose control voltage is freely selectable within specifiable limits. The voltage regulator, which is embodied as an in-phase regulator, makes available a regulated voltage on the output side, which is used for supplying the usual vehicle electrical system users as well as for charging the battery. The in-phase regulator is furnished with an electronics system or an intelligence which includes a microprocessor and which evaluates supplied data with regard to voltages, currents or load breakings and which specifies response criteria, and, upon the reaching of certain response criteria, initiates the measures which then become necessary.

Abstract: A power supply device, comprising first and second lead terminals for connection with a load, a fuel cell, an energy storage element connected between the first and second lead terminals, a synchronous-rectification switching power-source portion for converting the output voltage of the fuel cell to the output voltage of the energy storage element and outputting it to the first and second lead terminals, and a current-detecting portion for detecting the output current of the fuel cell, the switching power-source portion further comprising a first switching element connected to the energy storage element in series, a second switching element connected to the energy storage element in parallel, and a simultaneous-turn-off controller for turning off the first and second switching elements simultaneously when the output current detected by the current-detecting portion is not larger than a preset current threshold.

Abstract: This present invention relates to a voltage converting apparatus with auto-adjusting boost-multiple, which includes a microprocessor unit, a boost multiple control unit, a boost unit, and a voltage converting unit. According to the digital signal, the microprocessor unit generates an output voltage information and a converting multiple information. According to the output voltage information, the boost multiple control unit computes the corresponding relation between an output voltage and an input voltage in order to generate the boost multiple information. Based on the boost multiple information, the boost unit can amplify the output voltage to generate an converting operation voltage. The voltage converting unit operates between the converting operation voltage and a fist voltage, and converts a reference voltage into the output voltage according to the converting multiple information.

Abstract: A semiconductor integrated circuit includes a first circuit block which operates at a first internal voltage, a second circuit block which operates at a second internal voltage, is connected to an output stage of the first circuit block, and receives a signal from the first circuit block, and a voltage controller which supplies the first internal voltage to the first circuit block by using a first high-potential power, supplies the second internal voltage to the second circuit block by using a second high-potential power, and performs control such that the second internal voltage does not exceed the first internal voltage.

Abstract: A phase control device for use with a voltage-boosting DC/DC converter includes a current sensor for detecting a current flowing through at least one of the primary and secondary windings of a transformer of the DC/DC converter, a ripple determining section for, on the basis of a current signal detected by the current sensor, determining an amount of current ripple occurring when a first switching element or second switching element switches to an ON state, and a phase regulating section for, on the basis of the amount of current ripple determined by the ripple determining section, regulating a phase related to an ON time of each of the first and second switching elements such that the amount of current ripple is reduced to zero.

Abstract: A voltage regulator has a device for regulating an output voltage, having an input to receive an input voltage and an output to deliver an output voltage of a constant level, and a device for correcting a drop-out voltage violation, coupled to the device for regulating, to determine an occurrence of a drop-out voltage violation and to cause the device for regulating to change the level of the output voltage upon detection of the drop-out voltage violation. A method for regulating an output voltage has the steps of receiving an input voltage, generating and outputting a regulated output voltage of a constant level, monitoring occurrence of a drop-out voltage violation, and causing a change of the level of the output voltage upon detection of the drop-out voltage violation.

Abstract: A multiple output stage converter (MOSC) and an operating method thereof are provided. The MOSC includes a first transistor, a second transistor, a third transistor, and a logic control module. A terminal of the first transistor, a terminal of the second transistor, and a terminal of the third transistor are coupled to a power source via an inductor. Another terminal of the first transistor is coupled to a first output terminal. Another terminal of the second transistor is coupled to a second output terminal. Another terminal of the third transistor is coupled to a ground voltage. The logic control module is used to control the on/off state of the second transistor. The well of the second transistor is floating when the first transistor or the third transistor is on. The well of the second transistor is floated or coupled to the second output terminal when the second transistor is on.

Abstract: A switching regulator for inputting a power source, supplying output power to an external circuit, and adjusting the output voltage to a target voltage, the switching regulator has a switching regulator circuit having first and second transistors, a feedback circuit that receives the output voltage, and outputs a control pulse signal at a frequency in accordance with the received output voltage; a PLL circuit unit having a PLL circuit, and a first control signal generating circuit that outputs the first control signal for controlling the first transistor; and a drive circuit that outputs a second control signal that controls the second transistor; and a control circuit that monitors the period of the PLL output pulse and the control pulse signal, and controls the ON and OFF timing of the second transistor when a difference of monitored periods.

Abstract: An apparatus to prevent overheating of a print head. The apparatus includes a temperature sensing unit, a voltage dividing unit, and a comparing unit. The temperature sensing unit includes a first resistor having a low temperature coefficient of resistance (TCR) and a second resistor having a higher TCR than the first resistor, and outputs a voltage between the first resistor and the second resistor. The first resistor and the second resistor are connected in series. The voltage dividing unit divides a reference voltage and outputs the divided reference voltage. The comparing unit compares the output voltage of the temperature sensing unit and the output voltage of the voltage dividing unit and outputs a signal to stop an operation of the print head according to the comparison result.

Abstract: A micropower Maximum Power Point Tracker (?MPPT) suitable for use in low power applications to maximize the power output for a solar-power cell array. In one embodiment, a ?MPPT comprises an electrical circuit which includes a microprocessor/microcontroller used to execute the ?MPPT control algorithm, and a modulator controller to control the pulse width or frequency to a high speed switch. In addition, the electrical circuit may include an analog-to-digital (A/D) converter usable to measure the input voltage from a connected solar array, the current through an inductor of the circuit, and the voltage of an attached energy store/load. In another embodiment, the ?MPPT may operates in at least two modes depending on the energy store/loads conditions.

Abstract: An exemplary voltage regulating circuit (20) includes a voltage modulating unit (22, 24) and a voltage-dividing unit (26). The voltage-dividing unit includes a voltage divider (27) and at least one voltage stabilizing circuit (28) electrically coupled to the voltage divider. The voltage modulating unit transforms an input voltage to an operation voltage. The voltage divider divides the operation voltage into a plurality of sub-voltages, the at least one voltage stabilizing circuit stabilizes a corresponding one of the sub-voltages at a desired value, and the at least one voltage stabilizing circuit outputs the stabilized voltage.

Abstract: A constant-current circuit and a system power source using this constant-current circuit are disclosed, which can generate plural highly accurate constant currents and supply them as bias currents by reducing variations caused by a change of a manufacturing process and a change of temperature. An operational amplification circuit AMP controls the operation of PMOS transistors M1 and M2 so that negative feedback is applied to a variation of one of currents i1 and i2 flowing from the PMOS transistors M1 and M2 and the variation is canceled.

Abstract: A synchronous rectification switching regulator, and a control circuit and a control method for controlling the synchronous rectification switching regulator. The regulator includes an output terminal, a first switching device, an inductor, a second switching device for synchronous rectification, a control circuit unit to control switching of the first switching device and cause the second switching device to perform switching opposite to that of the first switching device, and a reverse current detection circuit unit to detect a generation or an indication of a reverse current flowing from the output terminal to the second switching device and make the control circuit unit turn off the second switching device when a generation or an indication of the reverse current is detected. The reverse current detection circuit unit stops detecting a generation or an indication of the reverse current while the second switching device is turned off by the control circuit unit.

Abstract: A sensor arrangement including a control circuit is disclosed. In at least one embodiment, at least one sensor electrode can be charged and/or discharged therewith and a comparator unit for the comparison of a provided voltage for the at least one electrode with a reference voltage. A duration necessary for the charging/discharging of the at least one sensor electrode is determined, whereby, from the determined duration, it is determined whether a sensor event, in the form of a hybridisation between trap molecules and the particles for recording, has occurred.

Abstract: A method for setting a reference potential of a current sensor in a power semiconductor device is disclosed. On the basis of a specific geometry and a typical two-dimensional potential distribution of the power semiconductor device, a plurality of tapping points is predetermined on an area of the power semiconductor device. On the basis of the specific geometry of the power semiconductor device, a line course between the tapping points and a measuring point for measuring a potential average value is determined and realized. Respective potential values are detected at the tapping points and fed to the measuring point. The potential average value is determined at the measuring point. The potential of the current sensor is set to the potential average value thus determined.

Abstract: An electrical phase checking apparatus includes a first voltage sensor, a first current sensor, a first binary indicator corresponding to the first voltage and current sensors, a second voltage sensor, a second current sensor, and a second binary indicator corresponding to the second voltage and current sensors. The first binary indicator is configured to indicate when a phase separation between a voltage waveform measured by the first voltage sensor and a current waveform measured by the first current sensor is not more than a first value, and the second binary indicator is configured to indicate when a phase separation between a voltage waveform measured by the second voltage sensor and a current waveform measured by the second current sensor is not more than a second value.

Abstract: A utility meter having a temperature compensation function provides advantages such as improved time keeping accuracy. According to an exemplary embodiment, a utility meter includes at least one sensor for detecting an ambient temperature at a location corresponding to a component such as a crystal oscillator that enables a time keeping function of the meter, and generating an output signal representative of the detected ambient temperature. A device such as a digital signal processor adjusts at least one clock maintained by the time keeping function of the meter in dependence upon the output signal from the at least one sensor.

Abstract: A method and apparatus for simultaneously measuring current flows through individual structures in a multi-structure composite joint is provided. The method comprising inserting a printed circuit board, etched with Rogowski coil sensory circuits, inside the joint between at least two structures with the at least two structures extending through the Rogowski coil sensory circuits in the printed circuit board; detecting induced current in the at least two fasteners; transmitting the induced current to a passive integrator array for capturing transient pulses from the printed circuit board and integrating the pulses into an array output; transmitting the array output to a processing unit.

Abstract: Vertical contactors regularly arrayed over a film is brought into vertical contact with the end faces of wiring terminals formed at one end of a flexible flat cable, and signal lines from a narrowed-pitch contactor array are connected to a printed circuit board. For this purpose, there is to be realized a coordinate transforming apparatus for electrical signal connection including: a device that has probe input terminals and probe output terminals arrayed in narrow-pitch lines which come into contact with and establish continuity to a wafer pad and in which the probe output terminals are arrayed two-dimensionally in a wide pitch over a substantial plane; a y-directional wiring group in which the probe output terminals and transformation wiring input terminals cross each other to come into contact with and establish continuity among each other; and an x-directional wiring group that crosses and establishes continuity to the output terminals of the y-directional wiring group.

Abstract: A method for calibrating a transfer function of a magnetic sensor (MS) on a substrate (SBSTR) in which sensor (MS) the presence of magnetizable objects (SPB) can be detected by magnetizing the objects (SPB) by a magnetic field (H) delivered by a magnetic field generator (WR1, WR2) and in which the transfer function is defined as the transfer from an electrical input signal (Iin) for generating the magnet field H, via magnetic stray field (SF) radiated by the objects (SPB) when magnetized, to an electrical output signal (Iout) delivered by the sensor (MS), comprising the steps of: putting sample fluid on the substrate (SBSTR), the sample fluid comprising a large amount of the magnetizable objects (SPB), attracting part of the magnetizable objects (SPB) towards the magnetic sensor (MS), activating the electrical input signal (Iin), thereby generating the magnet field (H), measuring the electrical output signal (Iout) as a response to the electrical input signal (Iin), calculating the transfer function from the

Abstract: A position sensor system including a magnet, a magnetic flux sensor positioned a distance away from the magnet, the magnetic flux sensor and the magnet defining a flux path therebetween, and a flux guide positioned in the flux path to guide magnetic flux to the magnetic flux sensor.

Abstract: A portable terminal device is disclosed that includes a movable part having a display part; an arm part supporting the movable part so that the movable part is rotatable at least ±90° with reference to a rotation center position around a rotation center; and a position detection part detecting the position of the movable part relative to the arm part. The position detection part includes magnets, magnetic sensors detecting the magnetic fields thereof, and a calculation part determining the position of the movable part based on sensor outputs. The magnets are provided in one of the arm part and the movable part so as to be 90° apart from each other around the rotation center. The magnetic sensors are provided in the other one of the arm part and the movable part so as to oppose the corresponding magnets when the movable part is positioned at the rotation center position.

Abstract: A vehicle includes a magnetic sensor comprising a plurality of layers including a substrate having circuitry, at least one conductive layer to interconnect the circuitry, and an insulator layer to electrically insulate the at least one conductive layer. First and second conductive layers are generally parallel to the substrate with a dielectric layer disposed between the first and second conductive layers such that the first and second conductive layers and the dielectric layer form a capacitor. A first terminal is electrically connected to the first conductive layer and a second terminal is electrically connected to the second conductive layer.

Abstract: A rotation measurement system comprises a rotatable annular magnetic encoder 16 carrying a series of encoding elements 23 arranged around the circumference of the encoder according to a periodic pattern, characterized in that it comprises a primary sensor assembly 38 comprising at least a primary magnetic sensor 38 disposed facing the encoding elements for detecting the angular position of the encoder with a discrete angular resolution of a fraction of a revolution equal to or less than one period of the encoder and an electronic counter for the number of fractions of a revolution made, and a secondary sensor assembly comprising secondary magnetic sensors 24a to 24d, 25a to 25d disposed facing the encoding elements for determining an absolute position of the encoder between two positions separated by at least one fraction of a revolution.

Abstract: A method, computer-readable medium, and apparatus for measuring properties of a magnetic read head are provided. In one embodiment, the method includes providing a first and a second magnetic read head. A first dimension of the first magnetic read head is different from a corresponding first dimension of the second magnetic read head. The method further includes determining a first change in conductance of the first magnetic read head resulting from an applied magnetic field and a second change in conductance of the second magnetic read head resulting from the applied magnetic field. The first change in conductance and the second change in conductance are used to determine a change in the first dimension and the corresponding first dimension of the first and second magnetic read heads, respectively. The change in the first dimension and the corresponding first dimension results from a manufacturing process of the first and second magnetic read heads.

Abstract: A detecting device includes a viscoelastic magnet obtained by kneading and molding a magnet material and a viscoelastic material and a magnetic-flux detecting unit that detects a change in a magnetic flux density vector due to deformation of the viscoelastic magnet.

Abstract: NMR spin echo signals are acquired downhole. A partial least squares method is used to determine parameters of a parametric model of the T2 distribution whose output matches the measurements. The model parameters are telemetered to the surface where the properties of the formation are reconstructed. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).