Abstract: A method for judging vehicle collision in which an output signal from an acceleration sensor carried on a vehicle, which is obtained from a time of start of judgment on collision, is outputted through interval windows each having a predetermined time width of a plurality of sampling cycles and provided as those successively delayed by one sampling cycle respectively. A waveform of the output signal is Hadamard-transformed and decomposed into frequency components for each of the interval windows by using an Hadamard-transforming unit. A threshold value set for a predetermined frequency component and outputted from a threshold-outputting unit is compared with a level value of the predetermined frequency component selected from the frequency components obtained by the decomposition in the Hadamard-transforming unit, by using a collision-judging unit. Occurrence of collision of the vehicle is judged on the basis of a result of the comparison.

Abstract: A static reactive power compensating equipment includes a circuit for preventing harmonic currents generated by adjusting lag compensation current from phase control from flowing out of the equipment. A first reactor and a controller are connected to a switching circuit. A second reactor is connected between an output terminal and a connection node. The first reactor is also connected to the connection node such that the first and second reactors are series connected. A resonant circuit including a third reactor connected in series with a capacitor is connected to the connection node such that the resonant circuit is series connected with the second reactor and parallel connected to the first reactor. The resonant circuit is constructed to resonate at a predetermined frequency which substantially absorbs harmonic currents flowing from the static reactive power compensating equipment.

Abstract: An air bag apparatus for a vehicle is characterized in that an air bag, an inflator and acceleration sensors for controlling the inflator are closely disposed in a single place to constitute an air bag unit. The acceleration sensors in the air bag unit are made up of a plurality of acceleration sensors of different kinds. The air bag unit is disposed on a steering wheel and each of the acceleration sensors is disposed such that the direction of movement of a movable element to be provided in each of the acceleration sensors is parallel to an axis of rotation of the steering wheel. The inflator is electrically ignited and each of the acceleration sensors controls the electric current supply to the inflator.

Abstract: In a medium detecting system having a plurality of optical sensors, each including a light-emitting element and a light-receiving element whose current varies with the amount of light received, and a load resistance unit provided in common for the sensors, the resistance of the load resistance circuit can be varied in accordance with load resistance selecting data supplied thereto. A sensor selector is responsive to sensor selecting data for selecting one of the sensors and connecting the light-receiving element of the selected sensor to the load resistance unit. A rewritable memory stores the sensor selecting data and data used for selecting the load resistance.

Abstract: In an optical media monitoring device that detects presence of light-interrupting media between a photoemitter component and a photoreceptor component provided to operate in cooperation with each other, the photoemitter component is driven at a variable level of light emission, and a comparator compares the output of the photoreceptor component with a reference signal which is also variable. The driving means is controlled to cause the photoemitter component to emit a level of light lower than normally used for media detection. Dust degradation of the sensor is determined by checking, in a state of no media present and the reduced light emission of the photoemitter component, whether the output of the photoreceptor component is greater than the reference signal level.

Abstract: A time-axis correcting circuit for a recorded data reproducing device such as a video disc player in which, even when a dominant time-axis error component is not a single-frequency component, suppression thereof is sufficiently achieved with a relatively simple circuit configuration. The time-axis correcting circuit includes first and second time-axis correcting circuits, each of which has a flywheel oscillator servo loop. The oscillation frequency of the first flywheel oscillator servo loop is set close to the lowest frequency of the dominant time-axis error component to be suppressed while that of the second time-axis correcting circuit is set close to the highest frequency of the dominant time-axis error component to be suppressed.

Abstract: An apparatus for reproducing a video signal by detecting a video signal recorded on a rotary recording medium. The apparatus includes a variable delay for inputting and delaying a detected video signal, a phase comparator for comparing each phase of a timing signal, such as a horizontal sync signal, or the like, obtained from input and output sides of said variable delay, and a voltage-controlled oscillator for controlling a delay period of a variable delay receiving the output of a comparator.

Abstract: A time-axis correcting circuit for a recorded data reproducing device, such as a video tape player or video disc player, in which dominant and other time-axis errors are substantially completely suppressed. The reproduced signal is applied to the input of a variable delay circuit. A timing data component, such as the color burst signal, is separated from the delayed reproduced signal and applied to a flywheel oscillator, the open-loop oscillation frequency of which is set at least approximately to the frequency of a dominant time-axis error component to be suppressed. The output of the flywheel oscillator is applied through a voltage-controlled oscillator to the control input of the variable delay circuit.

Abstract: A color sign inserting circuit for a video signal reproducing system is disclosed, which comprises a the color burst detecting circuit for extracting color burst from a video signal detected from a recording system, a flywheel oscillator locked to the average values of the frequency and phase of a color burst signal extracted from the color burst detecting circuit for detecting time axis variation components, a phase shifter for controlling the phase of the clock output of the flywheel oscillator, and a sign inserting circuit for superimposing the output of the phase shifter and a sign signal on the video signal. Display of an inserted sign in color in the reproduction of video thus can be realized by merely adding an inexpensive color signal shifter to the conventional functions necessary for the video signal processing.

Abstract: An apparatus for reproducing recorded data by detecting data recorded on a rotary recording medium while rotating said rotary recording medium includes a variable delay for delaying a detected data signal, a phase-locked loop for generating a clock signal that controls the variable delay, and a reference signal generator for providing synchronization to a clock signal obtained from said phase-locked loop.

Abstract: In a disc reading device wherein the rotating speed is normally controlled by detecting the synchronizing signal part of a reproduced signal, a second speed control circuit is included for measuring the speed of the disc and controlling the speed to a desired value independently of the detected synchronizing signals. When signal drop-out or the like occurs, the second speed control circuit takes over.

Abstract: A two-way CATV system having a substantial number of terminals incorporates a central processor and transmitter system which continually interrogates the terminals at high speed, monitoring changes of usage of premium programs and other data while also permitting central control of access to restricted premium programs. For inexpensive but reliable intercommunication, short, fixed word length digital messages are frequency multiplexed onto the cable in both upstream and downstream directions, and subscriber groups are controllably selected in turn, with each subscriber being scanned in what may be an arbitrary order by transmission of unique private messages which are recognized at the terminal and in response to which previously prepared fixed length messages are immediately transmitted in return.