摘要:
2-4-Dichloro-3-alkyl-6-nitrophenols which are useful as intermediate of cyan couplers in color photography are prepared by sulfonating 4-chloro-3-alkyl-phenols to obtain 5-chloro-4-alkylhydroxybenzenesulfonic acids, chlorinating the acids in an aqueous phase to obtain 3,5-dichloro-4-alkyl-2-hydroxybenzenesulfonic acids and nitrating the sulfonic acids.
摘要:
The sensor device includes a counter for counting the number of count commands used to perform measurements while maintaining among multiple sensor devices the ratio of measurement intervals; a ratio-holding-unit for setting the ratio to a desired ratio and holding respective values of the ratio for each of the multiple sensor devices; a sampling-timing-generating-unit for receiving a count value of the counter and the setting value of the ratio held by the ratio-holding-unit, and for generating a sampling timing signal based on the comparison result between the count value and the setting value; and a sampling-unit for sampling a detection signal detected by the detecting unit, by using the sampling timing signal generated by the sampling-timing-generating-unit.
摘要:
An adjustable power supply (1) for light emitting diode arrangements (11), with the power supply (1) being dimensioned for a power class. The power supply (1) has an adjustable current source (3) and an adjustable power limitation (4), and the power limitation (4) is adjustable within the limits of the power class. The power supply (1) further has a control component (5) that is suitable for running an operating program (8). This operating program (8) uses, as its input parameters (7), the number of light emitting diodes (13) to be controlled and their method of connection and, from these parameters, it calculates the required current and the required power, according to which the current source (3) and the power limitation (4) are adjusted and regulated.
摘要:
The present invention relates to a spatial information detecting system. A magnetic sensor driving unit drives a magnetic sensor via a multiplexer unit. Signals of the magnetic sensor are converted from analog signals to digital signals, and are transmitted from a data transmitting unit to an arithmetic unit as magnetic data. A Fourier transform unit calculates the amplitudes and phases of a plurality of frequency components of individual axes from the output signal of the magnetic data receiving unit. A magnetic field vector calculating unit calculates signs of the amplitudes of the individual axes from phase relationships between the plurality of frequency components on the individual axes from the output signal from the Fourier transform unit, and calculates the magnetic field vector representing the direction and magnitude of the magnetic field from the signs and amplitudes. A direction calculating unit calculates the direction of the information terminal.
摘要:
A discharge lamp lighting apparatus includes an input power supply, a power supply circuit, a bridge circuit having switching elements Q1 to Q4 that performs AC operation of a discharge lamp, a lighting circuit, a control circuit that controls the power supply circuit, and a drive circuit that drives bridge circuit. An overcurrent suppressing circuit having a resistance element and a switching element connected to the resistance element in parallel therewith is connected between the negative side of the bridge circuit and the negative side of the power supply circuit, so that the overcurrent suppressing circuit automatically adjusts current flowing to the switching elements and suppresses the overcurrent upon starting the discharge lamp.
摘要:
A tilt sensor capable of measuring a tilt angle by utilizing piezoresistive effect without selectively etching a substrate having piezoresistors formed therein, wherein the backside of the silicon substrate 1 having piezoresistors R1 to R4 formed therein is uniformly ground to a deflectable thickness, both ends of the silicon substrate 1 are supported by a support member 2, and a weight member 3 is provided at the center of the silicon substrate 1 through a convex portion 3a.
摘要:
A static magnetic field and a gradient magnetic field which is of the same direction as the former but the intensity of which is graded in three intersecting directions are applied to an examinee's body so that space information therefrom can be discriminated. High-frequency pulses are applied by a solenoid coil and/or a surface coil to the examinee's body and a nuclear magnetic resonance signal therefrom is received to obtain the spatial distribution of information contained in the received signal. A static field generating means is constructed so that the static magnetic field is directed horizontal and the examinee's body is brought into and out of the static magnetic field perpendicularly thereto from the horizontal direction. The axis of the solenoid coil crosses the static magnetic field perpendicularly thereto and is held horizontal, and the examinee's body can be positioned in the solenoid coil. The surface coil whose RF direction is vertical is disposed in adjacent relation to a target region of the examinee's body so that the nuclear magnetic resonance signal can also be received by the surface coil.
摘要:
The present invention relates to a physical quantity measuring instrument and signal processing method thereof capable of reducing noise components and improving reliability without increasing size or cost of the circuit. A physical quantity detecting unit (11) has signal detecting components for detecting a plurality of signals based on a desired physical quantity and detects the desired physical quantity. A signal processing unit (12) executes signal processing of the signals detected on the individual detecting axes by the physical quantity detecting unit (11) for linearly combining the signals in different combinations with time. An arithmetic processing unit (13) combines and calculates a plurality of signals based on the physical quantity associated with the physical quantity detecting unit (11) from the signal data output by the signal processing unit (12). It can linearly combine the signals from the plurality of detecting axes in different combinations with time, output them, and obtain desired signal components whose noise components are reduced by calculating the outputs.
摘要:
There are provided an azimuth measurement device and its method for realizing an update of an offset calculated from the data acquired by azimuth measurement. A geomagnetism output measured by a 3-axis magnetic sensor is amplified and input to an A/D conversion section. A chopper section is arranged for switching the terminals for driving an X-axis, Y-axis and a Z-axis magnetic sensor and applies drive voltage output from a drive power source section to the X-axis, the Y-axis and the Z-axis magnetic sensor. The output amplified value amplified by the amplification section is converted from an analog signal to a digital signal by the ND conversion section and then is input to a sensitivity/offset correction calculation section. Output data from this sensitivity/offset correction calculation section is input to an azimuth calculation section and the corresponding azimuth information is output. A reliability information calculation section outputs reliability information.
摘要:
The present invention relates to an acceleration measuring device capable of acquiring the offset for correcting the output of a triaxial acceleration sensor. The invention is provided with an acceleration sensor for detecting the acceleration in a triaxial direction, a data acquisition portion for acquiring the triaxial output data, a data selecting portion for judging whether repeatedly acquired triaxial output data are appropriate to make a selection, a data accumulating portion for accumulating the thus selected triaxial output data, a reference point estimating portion estimating coordinate values of the reference point determined in the three-dimensional cartesian space by referring to the distribution of a predetermined number of accumulated triaxial output data in a three-dimensional cartesian space when each axial component is given as a coordinate value, and an offset correction/calculation portion for correcting the offset of the triaxial output data of the acceleration sensor.