Abstract: The sensor successively calculates a rolling angle, pitch angle and azimuth from the coordinate transformation matrix with the level error and azimuth error compensated. It calculates azimuth error compensatory values using the GPS direction signal and calculates a difference between the GPS direction signal and magnetic azimuth signal under a condition wherein the reliability of the GPS direction signal is high, whereas it calculates azimuth error compensatory values using the calculated difference between the GPS direction signal and magnetic azimuth signal and the magnetic azimuth signal under a condition wherein the reliability of the GPS direction signal is not high and under a condition wherein the reliability of the magnetic azimuth signal is not low.

Abstract: The present invention provides a small, low power consumption ultrasonic flow velocity meter. The burst signal generation section 110 generates two kinds of burst signals with a phase difference and sends these burst signals to a pair of transmission/reception ultrasonic transducers 6 and 7 located on the upstream side and downstream side of the conduit to be measured 9. Upon reception of the corresponding burst signals, the pair of the transmission/reception ultrasonic transducers 6 and 7 convert the burst signals, send ultrasonic waves with a phase difference to the conduit to be measured 9, receive the ultrasonic wave sent by the other transmission/reception ultrasonic transducer and propagated through the conduit to be measured and convert the ultrasonic waves to received signals.

Abstract: To provide a gyro compass for the use of a high speed ship, in a gyro compass of the type having north-seeking means which is applied to support a gyro sphere or gyro case immersed in a liquid in a tank, a substantially first-order lag filter is provided in an azimuth follow-up loop or a damping loop, the substantially first-order lag filter having a time constant T.sub.F which is approximately equal to a ratio C/k.sub.T of the viscosity torque coefficient C to the twisting torque coefficient k.sub.T of the torque produced between the tank and the gyro case. A speed error correcting means has a substantially first-order lag filter having a time constant which is approximately equal to that of the north-seeking means, and is applied to correct the output of azimuth indicator by a speed error correcting angle through the substantially first-order lag filter.

Abstract: This invention relates to a vibration-type gyro apparatus for measuring an angular velocity using the Coriolis force exerted on a tuning fork. The tuning fork has two vibrational members symmetric about a Z axis. The two vibrational members vibrate along Z axis and are displaced along a Y axis by the Coriolis force. Each of the two vibrational members includes a cantilevered tabular member arranged along an XZ plane and has a shape symmetric about the center axis thereof. Electrode sections are formed on the two sides of the vibrational members, and electrodes are formed in the internal space of a casing at positions corresponding to the electrode sections. The electrodes are arranged by being deviated outward or inward of the center axis of the vibration members with respect to the electrode sections. Each of the electrodes is supplied with a displacement detection AC voltage and a control voltage from a detection and drive circuit.

Abstract: An apparatus of for measuring roughness of a road surface such as convex, concave or inclination is to be mounted on the vehicle. The apparatus comprises a rotation driving member for generating rotation motion in vertical plane and for outputting a signal concerning its rotation angle. An inclinometer is provided to detect an inclined angle of the rotation driving member. A distance measuring member for measuring distance from road surface as being rotated by the rotation motion from said rotation driving member. A processing unit calculates a vertical distance and a horizontal distance between the apparatus and the road surface by means of the inclined angle detected by the inclinometer and the rotation angle detected by the rotation driving member.

Abstract: A response permission command is transmitted from a reader/writer, thereby setting all of data carriers to a response possible state. Subsequently, a data return command is transmitted, thereby returning data for collation on a bit unit basis. The reader/writer transmits a data collation command of, for example, bit 0 to each of the data carriers when recognizing the return of the data in which bits 0 and 1 mixedly exist. When an own return bit coincides with a collation bit, each of the data carrier judges that the collation succeeds and returns a next bit for collation. When they don't coincide, however, a state of the data carrier is switched to a response inhibition state. By repeating such processes with respect to all of the bits of the data for collation, only one data carrier finally remains in a response possible state and generates an access permission command, thereby performing the reading or writing operation.

Abstract: A waveguide having a pair of quarter-wavelength impedance transformers and adapted to divide and combine microwaves. The pair of quarter-wavelength impedance transformers includes two strip transmission lines connected together at one end, two ground conductors each located adjacent to and spaced from a respective one of said strip transmission lines, each said ground conductor serving as a ground potential at least mutually to the adjacent strip transmission line, and a dielectric substrate supporting thereon said strip transmission lines and said ground conductors. The two strip transmission lines may be connected to each other at numerous positions by resistors.

Abstract: An ultrasonic wave is emitted from an ultrasonic wave transducer for transmission to polymeric materials and received by an ultrasonic wave transducer for reception arranged at a predetermined distance away from the transducer for transmission. A propagation time of the ultrasonic wave and the level of the reception wave are measured during the process to heat or cool the polymeric materials. A state of the polymeric materials is discriminated on the basis of a characteristic curve which is determined by the propagation time and the reception wave level of the ultrasonic wave. In the case of measuring an asphalt paved road, when shoulder characteristics appear on the characteristic curve which is determined by the propagation time of the ultrasonic wave and the reception wave level, it is determined that a solid state in which a traffic lane can be opened was obtained.

Abstract: A distributed-line power divider comprising: a common port and n distributing ports adapted to be connected with respective external lines; and n impedance transformers disposed between the common port and the distributing ports and having a filter function. The filter function of the impedance transformers may be a low-pass filter, a high-pass filter or a band-pass filter.